Title of Invention

"STAPLER COMPRISING A STAPLE MAGAZINE; A STAPLE COVER FOR COVERING AN UPPER FACE OF THE STAPLE MAGAZINE"

Abstract

A stapler comprising: a staple magazine (5); a staple cover (4) for covering an upper face of the staple magazine (5), the staple cover (4) is openable and closable; a pusher (10) arranged in the staple magazine (5); and a pusher band (11) having a first draw-out preventing portion (18) engageable with the pusher (10) and a second draw-out preventing portion (19,20) locked by the staple cover (4), the pusher band (11) is arranged slidably forward from the pusher (10); wherein the pusher (10) is moved rearward interlocking with an operation of opening the staple cover (4); characterized in that the pusher (10) includes a band guide portion (27), wherein, when the staple cover (4) is closed, a front end portion of the pusher band (11) is moved into a side of a lower face of a staple (S) along the band guide portion (27). Figure: 1

Full Text

The present invention relates to a stapler, particularly to a stapler improving a pusher band type link mechanism. Background Art: There is known a manual type stapler constituted such that when an openable and closable staple cover coupled with a staple magazine by a hinge is pulled up, a pusher at inside of the stapler magazine is automatically moved rearward by a link to thereby achieve convenience in charging a staple by dispensing with manual operation of the pusher. There is a stapler of this kind using a pusher band, as a link, made not of a metal band but of a soft resin. The pusher band is formed with draw-out preventing portions having a wide width at both ends thereof, a front end thereof is slidably engaged with a pusher by penetrating a slit formed at the pusher, and a rear end thereof is locked by a staple cover. When the staple cover is pulled up, the pusher band is pulled rearward by the staple cover, and the draw-out preventing portion at the front end of the pusher band pulls the pusher to move rearward. When the staple cover is closed after charging a staple, the pusher is brought into elastic contact with a rear end of the staple, the pusher band is pushed out frontward by passing the slit of the pusher and a front end portion thereof reaches a front portion of inside of the staple magazine along an upper face of the staple. In the stapler using the pusher band made of a resin as the link, there is a case in which the pusher band pushed out frontward of the pusher in closing the staple cover does not move straightly and the front end portion jumps out to a side of the staple magazine. In this case, the front end portion of the pusher band may be pinched by the staple magazine and the staple cover to damage, and when the draw-out preventing portion at the front end is broken, the draw-out preventing portion cannot pull the pusher and a function thereof as the link is lost. Disclosure of the Invention Hence, there is brought about a technical problem to be resolved for preventing a pusher band from being damaged, and it is an object of the present invention to resolve the above-described problem. The invention is proposed in order to achieve the above-described object to provide a stapler characterized in a stapler constituted such that a link mechanism is interposed between an openable and closable staple cover for covering an upper face of a staple magazine and a pusher at inside of the staple magazine and the pusher is moved rearward interlocking with operation of opening the staple cover, and the stapler includes a link mechanism slidably engaged with the pusher by forming a draw-out preventing portion at a front end portion of a pusher band and locking a rear end portion of the pusher band by the staple cover, in which a front portion of the pusher is provided with a band guide port ion which is directing frontward and downward, and when the staple cover is closed, a front end portion of the pusher band is brought into a side of a lower face of a staple along a lower face of the band guide portion. Brief description of the drawings: Fig.l is a side sectional view of a stapler showing an embodiment of the invention. Fig. 2 (a) is a plane view of a pusher band, and Fig. 2 (b) is a side view of the pusher band. Figs.3(a) through 3(d) show a stapler cover, Fig.3(a) is a plane view, Fig.3(b) is a front view, Fig.3(c) isapartially notched side view, and Fig.3(d) is a bottom view. Figs.4(a) through 4(f) show a pusher, Fig.4(a) is a side sectional view, Fig.4(b) is a plane view, Fig.4(c) is a front view, Fig.4 (d) is a side view, Fig.4 (e) is a rear view, and Fig.4(f) is a bottom view. Fig.5 is a plane view of the pusher showing a state of being attached with the pusher band. Fig.6 is a side sectional view of the pusher showing a state of moving forward the pusher band. Further, in notations in the drawings, numeral 1 designates a stapler, numeral 2 designates a handle, numeral 3 designates a driver arm, numeral 4 designates a staple cover, numeral 5 designates a staple magazine, numeral 6 designates a clincher arm, numeral 10 designates a pusher, numeral 11 designates a pusher band, numeral 12 designates a long hole, numeral 13 designates a clincher, numeral 14 designates a driver, numerals 18, 19, 20 designate draw-out preventing portions, numeral 27 designates a band guide portion, and notation S designates a staple. Best Mode for Carrying Out the Invention: A detailed description will be given of an embodiment of the invention in reference to drawings as follows. Fig.l shows the stapler 1 and the handle 2, the driver arm 3, the staple cover 4, the staple magazine 5, and the clincher arm 6 are coupled by a hinge of a hollow pin 7. A spring guide shaft 8 is provided at inside of the staple magazine 5 in a front and rear direction, and the pusher 10 is urged forward by a compression coil spring 9 outwardly fitted to the spring guide shaft 8. The pusher 10 is inserted with a front end portion of the pusher band 11 made of a soft resin of polyethylene or the like, and a rear end portion of the pusher band 11 is inserted into the long hole 12 formed at the staple cover 4. When the handle 2 is pulled up upward from an initial state of Fig.l, the driver arm 3 and the stapler cover 4 are also pulled up along with the handle 2 to open an upper face of the staple magazine 5, at this occasion, the pusher band 11 is pulled rearward by the staple cover 4 to thereby move rearward the pusher 10 at inside of the staple magazine 5 to thereby bring about a state of capable of charging the staple into the staple magazine 5. When the handle 2, the driver arm 3 and the staple cover 4 are closed after charging a member of connecting the staples pressed into a "C" shape, the pusher 10 released of tension by the pusher band 11 is brought into elastic contact with a rear end face of the staple, and the staple is pressed to a front inner wall face of the staple magazine 5. When the clincher arm 6 and the handle 2 are gripped to close after charging the staple, the driver arm 3 and the staple cover 4 and the staple magazine 5 are moved downward and a front lower face of the staple magazine 5 is brought into contact with the clincher 13 via a binding sheet (not illustrated) , the driver arm 3 is further moved downward and the driver 14 provided at the front end of the driver arm 3 injects downward the staple at the frontmost row at inside of the staple magazine 5. The clincher arm 6 is provided with the flat clinch mechanism, and is formed to move rearward a stopper 16 of the flat clinch mechanism by a link 15 one end of which is engaged with the driver arm 3 by constituting a force point by an upper face of the staple magazine 5. In injecting the staple by moving downward the driver arm 3, the link 15 is pivoted by making the driver arm 3 proximate to the staple magazine 5, and a lower end of the link 15 impinges on the stopper 16 to slide rearward the stopper 16. A clincher guide 17 released of support by detaching the stopper 16 from the clincher guide 17 pressed by the staple magazine 5 is pressed downward and a front end portion of the staple impinges on the clincher 13 to be flatly folded to bend. Next, an explanation will be given of a pusher link mechanism. Figs.2 (a) and 2(b) show the pusher band 11 which is formed with the draw-out preventing portions 18, 19, 20 widths of which are expanded at both front and rear ends thereof and a slightly front side of a rear end thereof. Figs.3(a) through 3 (d) show the staple cover 4 formed with the long hole 12 which is long in a front and rear direction at a ceiling face slightly frontward from a bearing 21 at a rear end thereof, and the pusher band 11 is locked by inserting a rear portion of the pusher band 11 into the long hole 12 and bringing side edges of the long hole 12 between the draw-out preventingportions 19, 20(second draw-out preventing portion) at two locations of the rear portion. Figs.4(a) through 4(f) show the pusher 10 inserted into the staple magazine 5, which is an injection-molded resin part of polyacetal or the like and two front and rear faces of which are opened for penetrating the spring guide shaft 8 shown in Fig. 1 in the front and rear direction. The compression spring 9 is brought into elastic contact with a spring receiving portion 22 provided at a front portion of the pusher 10 to urge forward the pusher 10 and front end faces 23 on two left and right sides of the pusher 10 are brought into contact with the staple. Band support portions 24 projected to inner sides are provided at left and right inner wall faces of the pusher 10, and a front end portion of the pusher band 11 is inserted into a gap between the hand support portions 24 and a ceiling portion 25. Rear portions of the left and right band support portions 24 are raised vertically to be continuous to the ceiling portion 25, when the pusher band 11 is inserted from a rear side into the gap between the band support portions 24 and the ceiling portion 25, the pusher band 11 which is an elastic member is passed at inside of the gap by being flexed, as shown by Fig.5, the draw-out preventing portion 18 (first draw-out preventing portion) of the pusher band 11 is caught by vertical wall face portions 26 at rear ends of the band support portions 24, and the pusher band 11 and the pusher 10 are connected. A front portion of the pusher 10 is provided with the band guide portion 27 lowered in the front lower direction, and a lower end of the band guide portion 27 becomes lower than a height of the staple. When the pusher band 11 is pushed out frontward in a state of fixing the pusher 10, a front end portion of the pusher band 11 impinges on a lower face of the band guide portion 27 to deviate downward and move forward. When the handle 2 is returned to the initial state after charging the staple to the staple magazine 5 by opening the staple cover 4, the pusher band 11, the rear end portion of which is locked by the staple cover 4, is pushed out forward, and as shown by Fig. 6, the front end portion of the pusher band 11 impinges on the lower face of the band guide portion 27 to be brought to a side of a lower face of the staple S to move forward. The pusher band 11 is moved forward at inside of a space surrounded by the staple magazine 5 and the spring guide shaft 8 and the staple S in an up and down direction and a left and right direction and therefore, different from the stapler of the background art in which the pusher band is moved forward along the upper face of the staple, the pusher band 11 is not jumped out to the side of the staple magazine 4 and the pusher band 11 can be prevented from being damaged by being pinched by the staple magazine 5 and the staple cover 4. Further, the invention is not limited to the above-described embodiment but can variously be modified within the technical range of the invention and the invention naturally covers the modifications. The application is based on Japanese Patent Application (Japanese Patent Application No.2002-096798) filed on March 29, 2002 and content thereof is incorporated here by reference. Industrial Applicability: As has been explained above, the stapler of the present invention is constituted such that when the staple cover is closed, the front end portion of the pusher band is moved into the side of the lower face of the staple and therefore, the pusher band is not damaged by being pinched by the staple magazine and the staple cover, which is the invention achieving an effect in preventing the pusher band from being deteriorated and destructed. WE CLAIM: 1. A stapler comprising: a staple magazine (5); a staple cover (4) for covering an upper face of the staple magazine (5), the staple cover (4) is openable and closable;a pusher (10) arranged in the staple magazine (5); and a pusher band (11) having a first draw-out preventing portion (18) engageable with the pusher (10) and a second draw-out preventing portion (19,20) locked by the staple cover (4), the pusher band (11) is arranged slidably forward from the pusher (10); wherein the pusher (10) is moved rearward interlocking with an operation of opening the staple cover (4), characterized in that, the pusher (10) includes a band guide portion (27), wherein, when the staple cover (4) is closed, a front end portion of the pusher band (11) is moved into a side of a lower face of a staple (S) along the band guide portion (27). 2. The stapler as claimed in claim 1, wherein the band guide portion (27) is provided at a front portion of the pusher (10) and directing frontward and downward; and wherein when the staple cover (4) is closed, the front end portion of the pusher band (11) is brought into a side of the lower face of the staple (S) along a lower face of the band guide portion (27). 3. The stapler as claimed in claim 1, wherein the staple cover (4) includes a long hole (12); and, wherein the second draw-out preventing portion (19,20) of the pusher band (11) is locked by the long hole (12).

Documents:

2883-DELNP-2004-Abstract-(03-06-2010).pdf

2883-delnp-2004-abstract.pdf

2883-DELNP-2004-Claims-(03-06-2010).pdf

2883-delnp-2004-claims.pdf

2883-DELNP-2004-Correspondence-Others-(03-06-2010).pdf

2883-delnp-2004-correspondence-others.pdf

2883-DELNP-2004-Description (Complete)-(03-06-2010).pdf

2883-delnp-2004-description (complete).pdf

2883-DELNP-2004-Drawings-(03-06-2010).pdf

2883-delnp-2004-drawings.pdf

2883-DELNP-2004-Form-1-(03-06-2010).pdf

2883-delnp-2004-form-1.pdf

2883-delnp-2004-form-18.pdf

2883-DELNP-2004-Form-2-(03-06-2010).pdf

2883-delnp-2004-form-2.pdf

2883-delnp-2004-form-3.pdf

2883-DELNP-2004-Form-5-(03-06-2010).pdf

2883-delnp-2004-form-5.pdf

2883-DELNP-2004-GPA-(03-06-2010).pdf

2883-delnp-2004-gpa.pdf

2883-delnp-2004-pct-210.pdf

2883-delnp-2004-pct-308.pdf