JP4322014B2 - Stapler - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a binding sheet by ejecting a leading staple loaded in a magazine from a magazine toward a binding sheet by a driver, and bending a leg portion of the staple penetrating the binding sheet along a back surface of the binding sheet. This is related to the stapler.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a stapler is known in which a leg of a staple is substantially penetrated through a binding sheet and then the leg is engaged with a clincher so that the staple is folded along the back surface of the binding sheet. In this type of stapler, a magazine that contains a large number of staples, a driver that drives the staples in the magazine toward the binding paper, and a base that bends the staple legs that pass through the binding paper rotate or swing at the rear end. The base is formed with a clincher that engages and bends the staple legs penetrating the binding sheet, and a guide hole that guides the clincher at the front end portion and is formed with respect to the base. A clincher guide that is movably held is provided. The clincher guide supports the lower surface of the binding sheet in an upper position until almost all of the staple legs driven out from the magazine by the driver have penetrated the binding sheet, and the clincher is moved when substantially all of the staple legs have penetrated the binding sheet. By moving the guide to a lower position and engaging the staple leg with the clincher, the staple leg is bent along the back surface of the binding sheet.
[0003]
A mechanism for holding the tip of the clincher guide in the upper position and enabling the clincher guide to move to the lower position at a predetermined timing is necessary. The conventional mechanism is configured to move the clincher guide to the upper position by a spring. And an engaging position for supporting the clincher guide at an upper position by interposing the slide member between the clincher guide and the base. A clincher guide is provided so as to be slidable between a non-engagement position that allows movement to a lower position against the spring, and a slide member that is arranged at the engagement position by a biasing force of a spring is usually provided. The handle member is slid to the disengaged position in response to the staple driving operation of the handle member ( In example, see Patent Document 1).
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 6-50145
In the above prior art, in order to operate the slide member from the engagement position to the non-engagement position, a link member pivotally supported by the driver is provided, and the link member is connected to the magazine and the driver associated with the staple binding operation. The slide member is rotated from the engagement position to the non-engagement position by the lower end portion of the link member. That is, an appropriate timing of the staple binding operation in which the magazine is rotated toward the binding paper placed on the upper surface of the clincher guide, and the driver is further rotated so that the staples in the magazine are driven out toward the binding paper by the driver. The link member slides the slide member to the non-engagement position, and the clincher guide is allowed to descend, so that the clincher guide is moved to the lower position together with the magazine and the driver, and the staple leg is clinched. It is the structure made.
[0006]
[Problems to be solved by the invention]
By the way, in the above-described conventional stapler, the magazine is urged to rotate upward by a coil spring interposed between the magazine and the base support plate, and one driver is interposed between the magazine and the driver. The plate-shaped spring piece is urged to rotate upward with respect to the magazine. Then, the biasing force of the driver by the plate-shaped spring piece is more than the biasing force of the magazine by the coil spring so that the staples in the magazine are not driven out of the magazine by the driver before the magazine is rotated. It is set strongly. On the other hand, the link member is rotated as the driver and the magazine rotate relative to each other, and the driver rotates with respect to the magazine rotated until it comes into contact with the clincher guide by pressing and rotating the driver. The link member is rotated by the operation and the slide member is moved to the non-engagement position after staples in the magazine are driven out.
[0007]
When the slide member is moved to the non-engagement position, the magazine pressed by the plate spring piece of the driver presses the clincher guide downward and moves the clincher guide to the lower position. At this time, since the magazine is rotated ahead of the driver, a relative angle between the magazine and the driver is opened, and a lower end portion of the link member is separated from the slide member. For this reason, the slide member is returned to the front by the action of the urging spring, and the clincher guide may be pushed and moved forward as the slide member moves forward. As a result, the staple legs may be moved forward together with the binding sheets, and the leading ends of the staples may come out of the clincher grooves and enter between the clincher guides, resulting in binding failure.
[0008]
The present invention solves the above-mentioned problems of the prior art, can prevent the clincher guide from moving forward even if the slide member is moved forward, eliminates binding defects such as clinch-shaped variations, and is uniform and It is an object to provide a stapler capable of performing a stable clinching operation.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a stapler according to the present invention includes a magazine unit that stores a large number of staples, a handle unit that drives the staples stored in the magazine unit toward a binding sheet, and legs of the staples that are punched from the magazine. A clincher arm having a clincher portion that bends the sheet is rotatably supported at each rear end portion, and the clincher portion is engaged with a staple leg penetrating the binding sheet to bend and form the staple leg. The clincher, a clincher guide that can swing between an upper position and a lower position with the rear lower end as a fulcrum, and the clincher guide held at the upper position at the front position, and the clincher guide moved downward at the rear position A slide member that enables a staple leg that has penetrated the spelling paper In stapler which is adapted to be bent along the back side of the paper, to form the movement restriction means for restricting the forward movement of the clincher guide between the clincher guide and the clincher arm, the clincher guide swing downward When moving, the protrusions formed on both side surfaces of the clincher guide are brought into contact with guide surfaces formed below the front end of the side wall of the clincher arm so that the opening of the clincher guide is substantially perpendicular to the clincher. It is characterized by guiding to .
[0010]
According to a second aspect of the present invention, the clincher guide has an opening for accommodating the clincher, and the movement restricting means is formed in a direction perpendicular to the front surface of the peripheral wall forming the opening, and the clincher. The guide piece is formed so as to protrude vertically upward from the arm.At least when the clincher guide moves downward, the guide rib and the guide piece come into contact with each other and the clincher guide moves forward. It is characterized in that it is restricted from doing.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the examples shown in the drawings. FIG. 1 shows an embodiment of a stapler according to the present invention. The stapler 1 has a magazine portion 2 capable of accommodating a large number of staples and a staple loaded in the magazine portion 2 facing a binding sheet. A clincher arm 5 provided on the front end side with a handle portion 3 that is pushed out and a clincher portion 4 that is bent from the magazine portion 2 and pierced along the back surface of the spelled paper. The magazine portion 2 and the handle portion 3 are rotatably supported on the clincher arm 5 by a support shaft 7 at the respective rear end portions.
[0012]
The magazine section 2 is formed in a box shape to accommodate a large number of staples, and has a magazine 9 in which a punching outlet 8 for ejecting staples toward a binding sheet is formed at a front end portion, and staples loaded in the magazine 9 And a needle cover 11 disposed so as to cover an upper portion of the magazine 9 that is open. The staples loaded in the magazine 9 are pressed and supplied to the front of the magazine 9 by the pusher 10 so that the leading staple is disposed at the punching hole 8. The magazine 9 is urged to rotate in a direction in which a tip portion thereof is directed upward by a coil spring 12 interposed between the magazine 9 and the clincher arm 5.
[0013]
The handle portion 3 is provided with a driver 13 disposed so as to face the punching hole 8 of the magazine 9. When the handle portion 3 is rotated with respect to the magazine portion 2, the driver 13 is moved to the magazine 9. The leading staple is stamped out from the punching hole 8. The handle portion 3 has its tip end directed upward with respect to the magazine portion 2 by bringing a plate-like spring piece 14 integrally formed behind the driver 13 into contact with the upper surface of the needle cover 11 of the magazine portion 2. It is biased to rotate in the direction. The handle portion 3 is rotated by depressing the operation arm 6 disposed above the handle portion 3, and the magazine portion 2 is also rotated via the plate-like spring piece 14 by the rotation of the handle portion 3. Has been to be.
[0014]
The clincher arm 5 is formed by bending a metal plate material so that the cross section has a U-shape, and is assembled integrally with the clincher arm 5 so as to cover both side surfaces and the lower surface of the clincher arm 5. An arm cover 15 is provided. Further, a clincher portion 4 is formed on the front upper surface of the clincher arm 5 so that the staple legs penetrating the binding paper are bent flat along the back surface of the binding paper. The clincher unit 4 accommodates the clincher 16 formed in a plate shape that engages with the leg of the staple that has penetrated the binding paper and bends the staple leg flat along the back surface of the binding paper, and the clincher 16. A clincher guide 18 formed with an opening 17 and supported so as to be swingable with respect to the clincher arm 5, and disposed between the clincher guide 18 and the clincher arm 5 and slidably supported along the clincher arm 5. It is comprised by the slide member 19 currently made.
[0015]
The clincher 16 has a clincher groove 20 formed on the upper end surface thereof so as to engage with the leg portions of the staples and guide the leg portions to be bent inward along the back surface of the binding sheet. It is accommodated in a groove formed on the side surface of the front end portion of the armature and is arranged so as to be movable in the vertical direction, and is biased upward by a spring 22 interposed between the clincher 16 and the bottom surface of the arm cover 15. ing.
[0016]
The clincher guide 18 is swingable with respect to the clincher arm 5 by engaging an engaging claw 23 formed on the bottom surface of the rear end with an edge facing the front of an opening 24 formed on the bottom wall of the clincher arm 5. An opening 17 for accommodating the clincher 16 is formed at the tip of the clincher guide 18. The clincher guide 18 is configured such that the opening 17 can swing vertically along the clincher 16 with the rear lower end serving as a swing fulcrum, and the bottom surface of the clincher guide 18 and the bottom wall of the clincher arm 5 The tip of the clincher guide 18 is urged to rotate upward by a spring 25 interposed therebetween. The protrusions 26 formed on both side surfaces of the clincher guide 18 are engaged with the protrusions 27 formed on the front end of the side wall of the clincher arm 5 so that the upward rotation position is restricted. The opening 17 of the clincher guide 18 is made to swing in a substantially vertical direction along the clincher 16 by being brought into contact with a guide surface 28 formed below the projecting piece 27 and guided downward.
[0017]
Further, a slide member 19 is interposed between the clincher guide 18 and the clincher arm 5. The slide member 19 is slidable in the front-rear direction along the bottom wall by engaging a claw piece 28 formed to protrude on the lower surface side with an edge of an opening 24 formed in the bottom wall of the clincher arm 5. It is supported and urged forward by a spring 29 disposed on the rear surface of the rear wall of the slide member 19. When the slide member 19 is arranged forward in the sliding direction by the elasticity of the spring 29, a support portion 19a (see FIG. 2) formed at the front end portion of the slide member 19 enters the lower surface of the clincher guide 18 to move the clincher. The guide 18 is prevented from swinging downward. In this state, the clincher guide 18 is held at an upper position with respect to the clincher arm 5 so as to support the binding paper at the upper position. The clincher groove 20 on the upper end surface of the clincher 16 is disposed at a position facing the upper end edge of the opening 25 formed in the clincher guide 18. When the slide member 19 is moved rearward in the sliding direction against the biasing force of the spring 29, the support portion 19a is separated from the lower surface of the clincher guide 18 and the tip portion of the clincher guide 18 is swung downward. It becomes ready to move.
[0018]
One end portion of an L-shaped link member 30 is pivotally supported on the handle portion 3 via a shaft portion 31. The link member 30 is slidably engaged with the upper surface of the needle cover 11 whose central bent portion 30a covers the upper surface of the magazine 9, and the other end 30b extending below the link member 30 is the It corresponds to the engagement piece 19b formed on the side surface of the slide member 19 so as to be engageable. The link member 30 is rotated about the central bent portion 30a as a fulcrum by rotating the handle portion 3 relative to the magazine portion 2 in order to drive the staples in the magazine 2 from the punching outlet 8 by the driver 13. The other end 30b presses the engagement piece 19b of the slide member 19 rearward, and slides the slide member 19 backward against the urging force of the spring 29.
[0019]
As shown in FIGS. 3 and 4, a spring 29 that urges the slide member 19 forward in the sliding direction includes a rear wall 19 c formed at the rear end of the slide member 19 and a rear end of the clincher guide 18. The slide member 19 is slid and biased forward by the spring 29, and the clincher guide 18 is slid and biased rearward by the spring 29. ing.
[0020]
Between the clincher guide 18 and the clincher arm 5, a movement restricting means 32 for restricting the forward movement of the clincher guide 18 is formed. The movement restricting means 32 is integrally formed with a plurality of guide ribs 33 formed perpendicularly to the front surface of the front wall forming the opening 17 for accommodating the clincher 16 at the front portion of the clincher guide 18 and the clincher arm. A guide piece 34 is formed so as to protrude vertically upward from the front end portion of the arm cover 15 to which the arm cover 15 is attached. The slide member 19 is slid rearward so that the tip portion of the clincher guide 18 is lowered. When the guide rib 33 slidably contacts the guide piece 34 when swinging in the direction, the forward movement of the clincher guide 18 is restricted. Accordingly, it is possible to prevent the binding sheet and the staple leg penetrating the binding sheet together with the clincher guide 18 from moving forward with respect to the clincher 16.
[0021]
The operation of the above embodiment will be described with reference to FIGS. As shown in FIG. 5, when a binding sheet is inserted into the upper surface of the clincher guide 18 and the operation arm 6 is pressed down, the handle portion 3 is rotated and the magazine portion 2 is moved via the plate-like spring piece 14 of the handle portion 3. Is pushed and rotated, and the binding sheet is nipped between the lower surface of the magazine 9 and the clincher guide 18. At this time, since the slide member 19 enters the lower surface side of the clincher guide 18 and holds the clincher guide 18 in the upper position, the binding sheet is supported in the upper position and the rotation of the magazine unit 2 is stopped. As the handle portion 3 is further rotated, the leading staple in the magazine 9 is driven out toward the binding paper by the driver 13 of the handle portion 3.
[0022]
As shown in FIG. 6, the leg of the staple punched out by the driver 13 penetrates the binding paper and comes into contact with the clincher 16 to push the clincher 16 against the spring 22. The spring 22 that biases the clincher 16 upward is extremely weak and the staple leg is not bent at this point. The link member 30 is rotated by the rotation of the handle portion 3 and the magazine portion 2 when the driver 13 has driven almost all of the staple legs in the magazine 9 to a position penetrating the binding paper, and the link member 30 is rotated. The other end portion 30b of the slide member 19 engages with the engagement piece 19b of the slide member 19 to slide the slide member 19 backward against the elasticity of the spring 29. The movement of the slide member 19 causes the support portion 19a to move rearward from the lower surface of the clincher guide 18 and to allow the clincher guide 18 to rotate downward.
[0023]
When the slide member 19 supporting the clincher guide 18 in the upper position moves rearward, the magazine portion 2 that has been pressed downward through the plate spring piece 14 is pressed by the elasticity of the plate spring piece 14. The clincher guide 18 is rotated downward while being pressed downward. At this time, as shown in FIG. 7, the clincher guide 18 does not move forward because the guide rib 33 formed on the front side of the front wall of the opening 17 is in contact with the guide piece 34 formed on the arm cover 15. The binding sheet placed on the upper surface of the clincher guide 18 is also not moved forward, and the staple leg tip penetrating the binding sheet can be prevented from deviating from the clincher groove 20 of the clincher 16.
[0024]
Thereafter, as shown in FIG. 8, the handle portion 3 is further rotated by the pressing operation of the operation arm 6, and the staple leg is moved along the back surface of the binding sheet between the tip of the driver 13 and the clincher groove 20 of the clincher 16. Then, the staple binding is completed.
[0025]
In the above embodiment, before the stapling operation is performed, the guide rib 33 formed on the clincher guide 18 and the guide piece 34 formed on the arm cover 15 are separated from each other, and the distal end portion of the clincher guide 18 swings downward. In this case, the guide rib 33 and the guide piece 34 are set to engage with each other. However, the guide rib 33 and the guide piece 34 may be set in a state where they are always in contact with each other. Further, in order to restrict the forward movement of the clincher guide 18, a guide rib 33 is formed on the wall on the front side of the opening of the clincher guide 18, and the guide rib 33 is formed on the guide piece 34 formed to protrude from the arm cover 15. Although configured to abut, the present invention is not limited to this configuration, and movement restricting means 32 that restricts forward movement of the clincher guide 18 between the clincher guide 18 and the clincher portion. It can be realized by forming. Further, the groove 20 on the upper end surface of the clincher 16 is disposed at a position facing the upper end edge of the opening 25 formed in the clincher guide 18, but is fixed to the arm cover 15 at a predetermined interval from the upper end edge of the opening 25. It may be arranged.
[0026]
【The invention's effect】
According to the present invention, between the upper position where the binding paper is supported at the upper position and the binding paper is penetrated, and the lower position where the staple leg penetrating the binding paper is bent along the back surface of the binding paper. A movement restricting means that forms a movable clincher guide between the clincher guide and the clincher arm forms a movement restricting means for restricting the forward movement of the clincher guide, and the clincher guide swings downward. In some cases, the protrusions formed on both side surfaces of the clincher guide are brought into contact with a guide surface formed below the front end of the side wall of the clincher arm to guide the opening of the clincher guide in a substantially vertical direction along the clincher. since the way, the clincher guide movement child forward when the clincher guide swings from the upper position to the lower position Without, therefore staple legs tip it is possible to prevent causing any defects or disconnected clinch the clincher groove of the clincher.
[0027]
According to the invention of claim 2, an opening for accommodating the clincher is formed in the clincher guide, and the movement restricting means is formed in a direction perpendicular to the front wall surface of the opening formed in the clincher guide, and The guide piece is formed by projecting upward from the clincher arm in the vertical direction. At least when the clincher guide moves downward, the guide rib and the guide are brought into contact with each other so that the clincher guide moves forward. In addition to preventing the staple leg tip from coming out of the clincher groove of the clincher and causing a clinching failure, it is possible to simplify the configuration and suppress an increase in cost. .
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a stapler according to an embodiment of the present invention. FIG. 2 is a perspective view of a clincher guide and a slide member of the same stapler as FIG. 1. FIG. FIG. 4 is a partial cross-sectional view in which the stapler clincher portion of FIG. 1 is enlarged. FIG. 5 is a longitudinal side view showing an operation state in which the binding paper is sandwiched between the magazine portion and the clincher guide. FIG. 6 is a longitudinal side view showing an operating state in a state where staples are ejected onto a binding sheet. FIG. 7 is a longitudinal side view showing an operating state in which a clincher guide is swung downward. Longitudinal side view showing the operating state of the completed state [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stapler 2 Magazine part 3 Handle part 4 Clincher part 5 Clincher arm 9 Magazine 14 Plate-like spring piece 16 Clincher 18 Clincher guide 19 Slide member 30 Link member 32 Movement control means 33 Guide rib 34 Guide piece

Claims (2)

A clincher arm that includes a magazine unit that stores a large number of staples, a handle unit that drives the staples stored in the magazine unit toward a binding sheet, and a clincher unit that bends the legs of the staples that are punched from the magazine. And a clincher that engages with a staple leg penetrating the binding paper and bends and forms the staple leg, and an upper position with the rear lower end as a fulcrum. The binding sheet includes a clincher guide that can swing between a lower position and a slide member that holds the clincher guide at an upper position at a front position and allows the clincher guide to move downward at a rear position. A staple that folds the leg of the staple that penetrates the back of the stapled paper. In scan, to form a movement restricting means for restricting the forward movement of the clincher guide between the clincher guide and the clincher arm, when the clincher guide swings downward, on both sides of the clincher guide A stapler , wherein the formed protrusion is brought into contact with a guide surface formed below the front end of the side wall of the clincher arm to guide the opening of the clincher guide in a substantially vertical direction along the clincher .   An opening for accommodating the clincher is formed in the clincher guide, and the movement restricting means is formed with a guide rib formed in a vertical direction on a front surface of the peripheral wall forming the opening, and upward from the clincher arm in the vertical direction. The guide rib is configured to project, and at least when the clincher guide moves downward, the guide rib and the guide piece abut against each other to restrict the clincher guide from moving forward. The stapler according to claim 1.

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