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Dokumentenidentifikation EP1188523 21.09.2006
EP-Veröffentlichungsnummer 0001188523
Titel Heftpistole
Anmelder Max Co. Ltd., Tokio/Tokyo, JP
Erfinder Adachi, Max Co., Michiaki, Tokyo, JP;
Kosuge, c/o Max Co., Makoto, Tokyo, JP;
Ichiba, c/o Max Co., Tomofumi, Tokyo, JP
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 60122076
Vertragsstaaten DE, FR, GB
Sprache des Dokument EN
EP-Anmeldetag 12.09.2001
EP-Aktenzeichen 012503223
EP-Offenlegungsdatum 20.03.2002
EP date of grant 09.08.2006
Veröffentlichungstag im Patentblatt 21.09.2006
IPC-Hauptklasse B25C 5/16(2006.01)A, F, I, 20051017, B, H, EP
IPC-Nebenklasse B25C 1/00(2006.01)A, L, I, 20051017, B, H, EP   

Beschreibung[en]

The present invention relates to a staple gun according to the preamble of claim 1.

Description of the Prior Art

Conventionally, there are known staple guns such as those using electric power or compressed air to inject a staple into a target object.

Fig. 8 shows a staple injection nozzle 1 for injecting a staple from a staple gun into a target object. This staple injection nozzle 1 has a nozzle body 2 protruding from the front portion of the staple gun. In this nozzle body 2, a staple injection path 3 is formed through which the stable is injected. The staple (not depicted) has a pair of pins to be struck into a target object and a linking portion connecting these pins. The pins are set in the staple injection path 3 in such a manner that the pins are directed toward the target object. The staple set in the staple injection path 3 is pushed forward from the rear end thereof by a staple driver.

The staple injection path 3 has an upper portion closed by a cover plate 4 that can be opened, enabling to remove a staple which has been bent or a plurality of staples which are jammed.

In order to fix the cover plate 4, protrusions 5, 5 are provided at the top of two sides of the nozzle body 2. Bearings 9, 9 protrude from a rear portion of the surface of the cover plate 4 having a pin 8 for receiving a hinge portion 7 of a lock lever 6, so that both ends of a band 10 are rotatably held at both ends of the lock lever 6,

The cover plate 4 is supported on stepped portions 11, 11 formed on the side walls of the staple injection path 3. With the lock lever 6 rotated around the pin 8 to be in a raised state, the linkage portion 12 of the band 10 is set over the protrusions 5, 5. Then, the lock lever 6 is rotated around the pin 8 to be set in a lowered state and the band 10 is in an expanded state, so that the linkage portion 12 of the band is fixed to the stepped portions 11, 11.

However, such a staple gun has a problem that when a staple is injected from the staple injection nozzle 1, a staple may be subjected to a force caused by shock of the staple driver or hardness of a target object, the force tending to open, i.e., remove the cover plate 4 from the nozzle body 2. Moreover, when a staple is jammed in the staple injection path 3, the cover plate 4 is subjected to a force to open the cover plate 4 and a large load F is applied from the cover plate 4 directly to the linkage portion 12 of the band 10. This causes plastic deformation of the linkage portion 12, thereby lowering the force to push the cover plate 4. thus, the cover plate 4 begins to rattle, changing a staple injection orbit, which in turn easily causes a staple jam.

US-A-5 642 849 already discloses a staple gun comprising a main body and a staple injection nozzle for injecting a staple into a target object. The staple injection nozzle includes a nozzle body mounted on a staple striking body and a cover plate for removably closing an upper portion of a staple injection path of the nozzle body so as to guide the staple. The nozzle body is provided with protrusions to receive an end portion of the cover plate and press this cover plate from upward. Further, an urging member is provided to urge the cover plate in a direction that the end portion of the cover plate intrudes into the protrusions.

[Summary of the Invention]

It is an object of the present invention to provide a staple gun capable of suppressing rattle of a cover plate.

This object according to the invention is solved by a staple gun comprising the features of claim 1. Preferred embodiments of the staple gun are defined in the sub claims.

[Brief Description of Drawings]

  • Fig. 1 is an enlarged view of a staple injection nozzle of a staple gun according to an embodiment of the present invention.
  • Fig. 2 is a plan view of the staple injection nozzle of Fig. 1.
  • Fig. 3 is a side view showing engagement of main protrusions with cover protrusions in the staple injection nozzle of Fig. 1.
  • Fig. 4 is a cross sectional view showing the staple injection nozzle of Fig. 1 with a cover plate in an opened state.
  • Fig. 6 is a cross sectional view showing the staple injection nozzle of Fig.1 in a state prior to fixing the cover plate.
  • Fig. 6 is a cross sectional view of the cover plate of Fig. 5 set on the staple injection path and fixed to the staple injection path.
  • Fig. 7 shows an overall configuration of a staple gun having the staple injection nozzle of Fig. 1 to Fig. 7.
  • Fig. 8 is a partial enlarged view of a conventional staple injection nozzle.

Detailed Description of the Embodiments

Description will now be directed to a staple gun according to an embodiment of the present invention with reference to the attached drawings.

Fig. 7 shows a staple gun 20. The staple gun 20 includes: a staple gun main body 15; a handle 21 arranged below the staple gun main body 15; a trigger 22 arranged at left of the handle 21; and a staple injection nozzle 25 protruding forward from the left end of the staple gun main body 15. The staple gun main body 15 has a cylinder block 24 and a cylinder head 23.

A coupler 26 is arranged below the handle 21 of the staple gun 20. The coupler 26 is connected to a coupler (not depicted) of a compressed air supply hose (not depicted). Compressed air supplied from the coupler 26 is introduced to the cylinder head 23 through the interior of the handle 21 when the trigger 22 is pulled. Thus, the compressed air is supplied to the cylinder block 24. The cylinder block 24 has a built-in piston (not depicted). A staple driver is fixed to this piston. The staple driver extends from the cylinder block 24 to the staple injection nozzle and moves reciprocally in a staple injection path 43 (Fig. 1, Fig. 4 to Fig. 6) in the staple injection nozzle 25 in accordance with the reciprocal movement of the piston. Inside the staple injection path 43, a staple inlet 43a (Fig. 4 to Fig. 6) is formed for supplying U-shaped staples one by one from the staple guide 27 (Fig. 7).

The staple injection nozzle 26 has a nozzle body 28 attached to the staple gun main body 15 and a cover plate 29 attached to the upper portion of the nozzle body 28. On the nozzle body 28, a staple injection path 43 is formed. The cover plate 29 defines the upper portion of the staple injection path 43, so as to guide a staple to be injected, to a target object. At both sides of this cover plate 29, indentations 29A, 29A are formed. Bearings 35, 95 are arranged to protrude upward from both sides of rear portion of the cover plate 29.

At both sides of the nozzle body 28, protrusions 30, 30 are formed to be inserted into the indentations 29A, 29A of the cover plate 29, thereby fixing the cover plate 29. Each of the protrusions 30 is formed in a reversed L shape having a top portion 30a extending leftward in the figure. Below the top portions 90a, a taper surface 31 is formed in such a manner that the its height is gradually lowered toward the back (rightward in Fig. 3). The taper surface 31 is brought into abutment with a slanting surface (end portion) 33 of the left end 32 of the indentation 29A of the cover plate 29, so that the cover plate 29 is fixed to the nozzle body 28.

As shown in Fig. 4 to Fig. 6, at the back portion of the nozzle body 28, a plate member 45 is fixed by a bolt 44 so as to define the rear top portion of the staple injection path 43. This plate member 45 has hooks 39, 39 and stoppers 42, 42 at its both sides.

Moreover, the staple injection nozzle 25 has fixing means 34 for fixing the cover plate 29 to the nozzle body 28.

The fixing means 34 includes: a lock lever 37 whose rear portion is supported by a shaft 36 provided between the bearings 35, 35 of the cover plate 29; and a spring (urging member) for urging the lock lever 37 backward (rightward in Fig. 2 and Fig. 3). The spring 38 is constituted by a C-shaped needle when viewed in a plan view.

At both sides of the rear portion of the lock lever 37, bearing portions 41, 41 are provided to protrude downward. In the bearing portions 41, 41, a shaft 36 of bearings 35, 35 of the cover plate 29 is movably arranged. Moreover, both ends 38A, 38A of the spring 38 are rotatably held in the bearing portions 41, 41, i.e., at a position left (in Fig. 3 and Fig. 6) to the shaft 36 in such a manner that the lock lever 37 is rotated around the both ends 38A 38A.

As shown in Fig. 3 and Fig. 6, the spring 38 has intermittent portions 38B, 38B curved to protrude upward so as to have an elastic force and a rear portion 38C, which is rotatably held on hook portions 39, 39 of the plate member 45. Moreover, the spring 38 is regulated by stoppers 42, 42 of the plate member 45 in its leftward/rightward movement (upward/downward in Fig. 2).

The book portions 39, 39 have an open rear portion. When the cover plate 29 is opened in a normal condition, the hook portions 39, 39 rotatably hold the rear portion 38C of the spring 38. When the fixing means 34 is disassembled for repair, the rear portion 38C can be removed from the hook portions 39, 39.

When fixing this cover plate 29 onto the nozzle body 28, as shown in Fig. 5, the rear portion 38C of the spring 38 is held on the hook portions 39, 39 while the cover plate 29 is set on the staple injection path 43 as shown in Fig. 4, Here, the lock lever is in its raised state, the cover plate 29 is at a position forward from the position shown in Fig. 3, and the slanting surface 33 of the cover plate 29 is apart from the taper surface 31 of the protrusion 30 of the nozzle body 28.

As the lock lever 37 is tilted forward from this standing state, the lock lever is rotated counterclockwise (in Fig. 4) around the end portions 38A, 38A of the spring 38. This rotation of the lock lever 37 slides the cover plate 29 backward (rightward in Fig. 4). When the lock lever 37 is tilted as shown in Fig. 6, the slanting surface 33 of the cover plate 29 is brought into abutment with the taper surface 31 of the protrusion 80 of the nozzle body 28.

The cover plate 29 is urged backward by the urging force of the intermittent portion 38B of the spring 38, which in turn pushes the left end 32 of the indentation 29A of the cover plate 29 under the top portion 30a of the protrusion 30. That is, the cover plate 29 is pushed by the protrusion 30 from upward and firmly fixed to the nozzle body 28. This engagement is assured by a clearance in the order of 0.5 to 1 mm between the rear portion of the cover plate 29 and the front end 40 of the plate member 45.

When a staple is injected in a state with the cover plate 29 fixed to the nozzle body 28, shock of the staple driver and a hardness of a target object or staple jam generates a force to push the cover plate 29 upward, i.e., to open the cover plate 29, the force is applied to the taper surface 31 of the top portion 30a of the protrusion 30. However, since the top portion 30a of the protrusion 30 protrudes forward, it is possible to prevent opening of the cover plate 29.

Thus, the force pushing the cover plate 29 upward is applied only to the taper surface 31 of the protrusion 30 and not to the spring 38. Accordingly, there is no danger of expansion of the intermittent portions 88B, 88B of the spring 38 and it is possible to keep urging the cover plate 29 backward. Accordingly, it is possible to assure a force to press down the cover plate 29 and firmly fix the cover plate 29 to the nozzle body 28. Thus, it is possible to surely prevent rattling of the cover plate 29 which would derange the staple injection orbit, easily causing a staple jam.


Anspruch[de]
Heftpistole (20) mit einem Hauptkörper (15) und einer Heftklammer-Eintreibdüse (25) zum Eintreiben einer Heftklammer in ein Zielobjekt, welche Heftklammer-Eintreibdüse (25) einen Düsenkörper (28), der an einem Heftklammer-Schlagkörper befestigt ist, und eine Deckplatte (29) zum aufhebbaren Verschließen eines oberen Teils eines Heftklammer-Eintreibpfades (43) des Düsenkörpers (28), um die Heftklammer zu führen, enthält, wobei der Düsenkörper (28) Vorsprünge (30) zum Empfangen eines Endbereichs (33) der Abdeckplatte (29) und Drücken gegen diese Abdeckplatte (29) von oben hat, und

ein Druckteil (38) vorgesehen ist zum Drücken der Abdeckplatte (29) in einer Richtung, dass der Endbereich (33) der Abdeckplatte (29) in die Vorsprünge (30) eindringt,

weiterhin aufweisend einen Verriegelungshebel (37), der über eine Welle (36) auf der Abdeckplatte (29) in einer solchen Weise gelagert ist, dass der Verriegelungshebel (37) sich um die Welle (36) drehen kann,

wobei das Druckteil (38) angenähert in der Form des Buchstabens C gestaltet ist,

dadurch gekennzeichnet, dass

das Druckteil (38) zwei Endbereiche (38A) hat, die drehbar in einer Position vor der Wellenlagerposition des Verriegelungshebels (37) und einem hinteren Bereich (38C), der drehbar auf dem Düsenkörper (28) gehalten ist, gelagert sind, und die Abdeckplatte (29) geöffnet und geschlossen wird durch Drehen der Abdeckplatte (29) um einen hinteren Bereich (38C) des Druckteils (38), wobei das Druckteil (38) einen intermittierenden Bereich (38B) mit einer elastischen Kraft hat, um die Abdeckplatte (29) in Rückwärtsrichtung zu drücken, und,

wenn der Verriegelungshebel (37) geneigt ist, der Endbereich (33) der Abdeckplatte (29) mit den Vorsprüngen (30) durch die Druckkraft des Druckteils (38) in Eingriff ist, und wenn der Verriegelungshebel (37) angehoben ist, der Eingriff des Endbereichs (33) der Abdeckplatte (29) gelöst ist.
Heftpistole nach Anspruch 1, bei der das Druckteil (38) einen hinteren Bereich (38C) hat, der lösbar an dem Düsenkörper (28) befestigt ist. Heftpistole nach Anspruch 1, bei der der hintere Bereich (38C) des Druckteils (38) drehbar an einem Hakenbereich (39) gehalten ist, der an einem hinteren Bereich des Düsenkörpers (28) vorgesehen ist, um zu bewirken, dass die Abdeckplatte (29) sich um den Hakenbereich (39) dreht, und Vorsprünge (39a) vorgesehen sind, die an oberen Bereichen der Vorsprünge (30) in dem Düsenkörper (28) in Vorwärtsrichtung vorstehen, und bei der die Abdeckplatte (29) an dem Düsenkörper (28) fixiert ist durch den Eingriff von Endbereichen (32) der Abdeckplatte (29) mit der unteren Oberfläche der Vorsprünge (30a) an den Vorsprüngen (30) unter einer Vorspannkraft der Druckmittel (38), wenn die Abdeckplatte (29) auf dem Düsenkörper (28) angeordnet ist, der obere Bereich des Heftklammer-Eintreibpfades (43) des Düsenkörpers (28) geschlossen ist und der Verriegelungshebel (37) in Abwärtsrichtung gedreht ist,

wobei der Eingriff der Endbereiche (32) der Abdeckplatte (29) mit den Vorsprüngen (30a) der Vorsprünge (30) in dem Düsenkörper (28) gelöst ist, wenn der Verriegelungshebel (37) in Aufwärtsrichtung gedreht ist und die Abdeckplatte (29) um den hinteren Bereich (38C) der Druckmittel (38) zusammen mit der Drehung des Verriegelungshebels (37) gedreht ist, um die Abdeckplatte (29) zu öffnen.
Heftpistole nach Anspruch 3, bei der die unteren Oberflächen der Vorsprünge (30A) an den Vorsprüngen (30) in dem Düsenkörper (28) kronische Oberflächen (31) haben, die in Rückwärtsrichtung des Düsenkörpers (28) allmählich nach unten gerichtet sind. Heftpistole nach Anspruch 3, bei der die Endbereiche (32) der Abdeckplatte (29) abgeschrägte Oberflächen (33) haben.
Anspruch[en]
A staple gun (20) comprising a main body (15) and a staple injection nozzle (25) for injecting a staple into a target object, the staple injection nozzle (25) including a nozzle body (28) mounted on a staple striking body and a cover plate (29) for removably closing an upper portion of a staple injection path (43) of the nozzle body (28) so as to guide the staple,

wherein the nozzle body (28) has protrusions (30) to receive an end portion (33) of the cover plate (29) and press this cover plate (29) from upward, and

an urging member (38) is provided to urge the cover plate (29) in a direction that the end portion (33) of the cover plate (29) intrudes into the protrusions (30), further

comprising a lock lever (37) supported via a shaft (36) on the cover plate (29) in such a manner that the lock lever (37) can rotate around the shaft (36),

wherein the urging member (38) is formed approximately in letter C shape characterized in that the urging member (38) has two end portions (38A) rotatably mounted at a position in front of the by-shaft-supporting position of the lock lever (37) and a rear portion (38C) rotatably held on the nozzle body (28), and the cover plate (29) is opened and closed by rotating the cover plate (29) around a rear portion (38C) of the urging member (38),

the urging member (38) has an intermittent portion (38B) having an elastic force so as to urge the cover plate (29) backward, and

when the lock lever (37) is tilted, the end portion (33) of the cover plate (29) is engaged with the protrusions (30) by the urging force of the urging member (38), and when the lock lever (37) is raised, the engagement of the end portion (33) of the cover plate (29) is released.
The staple gun as claimed in Claim 1, wherein the urging member (38) has a rear portion (38C) detachably attached to the nozzle body (28). A staple gun as claimed in claim 1, wherein said rear portion (38C) of said urging member (38) is rotatably held on a hook portion (39) provided on a rear portion of the nozzle body (28) for causing the cover plate (29) to rotate about the hook portion (39), and projections (30a) are provided which forwardly project on upper portions of the protrusions (30) in the nozzle body (28), and wherein said cover plate (29) being fixed to the nozzle body (28) by engaging end portions (32) of the cover plate (29) with lower surface of the projections (30a) in the protrusions (30) under a biased force of the means for urging (38) when the cover plate (29) is placed on the nozzle body (28), the upper portion of the staple injection path (43) of the nozzle body (28) is closed and then lock lever (37) is downwardly rotated, the engagement of the end portions (32) of the cover plate (29) and the projections (30a) of the protrusions (30) in the nozzle body (28) being disengaged when the lock lever (37) is upwardly rotated, and said cover plate (29) being rotated about the rear portion (38C) of the means for urging (38) together with rotation of the lock lever (37) to open the cover plate (29). The staple gun according to claim 3, wherein the lower surfaces of the projections (30a) in the protrusions (30) in the nozzle body (28) have tapered surfaces (31) lowering gradually in accordance with proceeding rearwardly of the nozzle body (28). The staple gun according to claim 3, wherein said end portions (32) of the cover plate (29) have slanting surfaces (33).
Anspruch[fr]
Pistolet-agrafeur (20) comprenant un corps principal (15) et une buse d'injection d'agrafe (25) pour injecter une agrafe dans un objet cible, la buse d'injection d'agrafe (25) comprenant un corps de buse (28) monté sur un corps de frappe d'agrafe et une plaque de recouvrement (29) pour fermer de manière détachable une partie supérieure d'un trajet d'injection d'agrafe (43) du corps de buse (28) de manière à guider l'agrafe, dans lequel le corps de buse (28) comporte des protubérances (30) pour recevoir une partie d'extrémité (33) de la plaque de recouvrement (29) et presser cette plaque de recouvrement (29) à partir du haut, et

un élément de poussée (38) est prévu pour pousser la plaque de recouvrement (29) dans une direction dans laquelle la partie d'extrémité (33) de la plaque de recouvrement (29) pénètre dans les protubérances (30),

comprenant en outre un levier de verrouillage (37) supporté par l'intermédiaire d'un axe (36) sur la plaque de recouvrement (29) de manière à ce que le levier de verrouillage (37) puisse tourner autour de l'axe (36),

dans lequel l'élément de poussée (38) a approximativement la forme de la lettre C, caractérisé en ce que l'élément de poussée (38) comporte deux parties d'extrémité (38A) montées en rotation à une position face à la position de support par l'axe du levier de verrouillage (37) et une partie arrière (38C) maintenue en rotation sur le corps de buse (28), et la plaque de recouvrement (29) est ouverte et fermée en faisant tourner la plaque de recouvrement (29) autour d'une partie arrière (38C) de l'élément de poussée (38),

l'élément de poussée (38) comporte une partie intermittente (38B) ayant une force élastique de manière à pousser la plaque de recouvrement (29) en arrière, et

lorsque le levier de verrouillage (37) est basculé, la partie d'extrémité (33) de la plaque de recouvrement (29) est mise en prise avec les protubérances (30) par la force de poussée de l'élément de poussée (38), et lorsque le levier de verrouillage (37) est élevé, la mise en prise de la partie d'extrémité (33) de la plaque de recouvrement (29) est relâchée.
Pistolet-agrafeur selon la revendication 1, dans lequel l'élément de poussée (38) comporte une partie arrière (38C) fixée de manière détachable au corps de buse (28). Pistolet-agrafeur selon la revendication 1, dans lequel ladite partie arrière (38C) dudit élément de poussée (38) est maintenue en rotation sur une partie d'accrochage (39) prévue sur une partie arrière du corps de buse (28) pour amener la plaque de recouvrement (29) à tourner autour de la partie d'accrochage (39), et des protubérances (30a) sont prévues, lesquelles font saillie vers l'avant sur les parties supérieures des protubérances (30) dans le corps de buse (28), et dans lequel ladite plaque de recouvrement (29) est fixée au corps de buse (28) par les parties d'extrémité de mise en prise (32) de la plaque de recouvrement (29) avec la surface inférieure des protubérances (30a) dans les protubérances (30) sous une force de sollicitation des moyens pour pousser (38) lorsque la plaque de recouvrement (29) est placée sur le corps de buse (28), la partie supérieure du trajet d'injection d'agrafe (43) du corps de buse (28) est fermée et ensuite le levier de verrouillage (37) est tourné vers le bas, la mise en prise des parties d'extrémité (32) de la plaque de recouvrement (29) et des protubérances (30a) des protubérances (30) dans le corps de buse (28) étant relâchée lorsque le levier de verrouillage (37) est tourné vers le haut, et ladite plaque de recouvrement (29) étant tournée autour de la partie arrière (38C) des moyens pour pousser (38) par la rotation du levier de verrouillage (37) pour ouvrir la plaque de recouvrement (29). Pistolet-agrafeur selon la revendication 3, dans lequel les surfaces inférieures des protubérances (30a) dans les protubérances (30) dans le corps de buse (28) comportent des surfaces inclinées (31) s'abaissant graduellement en progressant vers l'arrière du corps de buse (28). Pistolet-agrafeur selon la revendication 3, dans lequel lesdites parties d'extrémité (32) de la plaque de recouvrement (29) comportent des surfaces en pente (33).






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

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