JP5115240B2 - Stapler - Google Patents

Description

  The present invention relates to an improved structure of a stapler for binding sheets used in an office or the like, and more particularly to an improved structure of a stapler provided with a booster mechanism effective in a binding operation for a large number of stacked sheets.

  In general, a stapler used in an office or home is configured to drive a staple onto a binding sheet by directly pressing a driver arm having a driver for driving staples. Recently, however, a handle member is provided on the driver arm, which is rotatable with an end rotation fulcrum whose position is shifted in the front-rear direction. A stapler has been known that has a structure that forms a force mechanism, and that reduces the operating force of the handle member in the sheet binding operation by using the boost effect of the boost mechanism, thereby facilitating the operation ( For example, see Patent Documents 1, 2, and 3).

In relation to this, from the viewpoint of universal design, more and more recent staplers are equipped with a booster mechanism that can be lightly bound.
No. 6-92075 JP 2006-102850 A JP2007-175835

  However, in order to be able to bind lightly, if the handle part is composed of two members, a driver arm and a handle member, and a booster mechanism using the lever principle is adopted, a large force is produced with a light force. The operation stroke of the handle member becomes large due to the structure to be made. For this reason, in the standby state, not only the space between the clincher groove and the magazine unit, which is the original space for inserting paper, but also a similar space portion is generated between the driver arm and the handle member. . In particular, in a small stapler, if the lever ratio is increased, the operation stroke required for the grip operation of the handle member is increased, so that a height is required. I have to be. Therefore, the user may accidentally insert the paper between the driver arm and the handle member when binding. Even if the handle member is operated in this state, not only the binding operation of the paper is not performed, but the mis-inserted paper is sandwiched between the driver arm and the handle member, so that the paper may be bent or damaged. There is a risk.

  In order to solve the problems peculiar to the stapler having the booster mechanism as described above, the present invention reliably prevents the paper from being erroneously inserted into the space between the driver arm and the handle member. The challenge is to provide a stapler that can be used.

In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a driver having a staple driving driver at a rear end portion of a clincher arm member having a clincher portion for bending a leg portion of a staple at a front end portion. The rear end portions of the arm and the magazine unit for loading the staples are pivotally supported, and the rear end portion of the handle member positioned on the opposite side of the magazine unit with respect to the driver arm is the pivot support position of the clincher arm member. The handle member is pivotally supported on the front end side, and the handle member is operatively connected to the driver arm via a booster mechanism, and the handle member is rotated to lower the driver together with the driver arm by the booster mechanism. A leg portion of the staple is passed through the binding member, and the back surface of the binding member in the clincher portion. Along a by the stapler to perform a stapling operation by bending, the sheet insertion preventing member prevents the paper into the space portion is inserted between the handle member and the driver arm is provided, the paper insertion prevention member In the non-binding operation, the tip is biased by an elastic member so as to close the gap between the handle member and the driver arm .

  According to a second aspect of the present invention, in the first aspect, the sheet insertion preventing member is formed to have a size that fits in a space between the handle member and the front and both sides of the driver arm during a binding operation. It is characterized by.

  According to a third aspect of the present invention, in the first or second aspect, the sheet insertion preventing member is pivotally supported by the handle member or the driver arm so as to be swingable.

According to a fourth aspect of the present invention, in the first aspect, the handle member includes a recess capable of accommodating at least a part of the paper insertion prevention member, and the paper insertion prevention member has the handle member or the end at one end side. A shielding plate that is pivotally supported by the driver arm and has the other end projecting from the recess and capable of shielding at least a part of the space between the handle member and the driver arm. A first engaging portion that engages with the handle member during non-binding operation and regulates the position of the sheet insertion preventing member that protrudes from the recess, and the binding plate A second engagement portion is formed which engages with the driver arm during operation and accommodates the sheet insertion preventing member in the recess.

According to a fifth aspect of the present invention, in the fourth aspect , the shielding plate portion includes a front plate portion capable of shielding at least a part of a front portion of the space portion between the handle member and the driver arm, and the space. And a side plate part capable of shielding at least a part of the side part of the part.

According to a sixth aspect of the present invention, in the fourth aspect , the first engaging portion is a protrusion formed so as to protrude from the tip of the shielding plate portion to the opening edge of the recess. Features.

According to a seventh aspect of the present invention, in the fourth aspect , the second engaging portion is an upper plate portion provided on an upper portion of the shielding plate portion.

According to an eighth aspect of the present invention, in any one of the fourth to seventh aspects, the paper insertion preventing member is urged by an elastic member so as to protrude from the recess of the handle member during a non-binding operation. It is characterized by that.

  According to the first aspect of the present invention, the handle member is operatively connected to the driver arm via the booster mechanism, and the handle member is rotated to lower the driver together with the driver arm by the booster mechanism, thereby causing the leg of the staple to move. A space between the handle member and the driver arm in a stapler that performs a binding operation by passing the portion through the binding member and bending the clincher portion along the back surface of the binding member. Since the paper insertion preventing member is provided on the base plate, only the base unit and the magazine unit are opened during the non-binding operation, and the upper handle member and the driver arm are blocked by the paper insertion preventing member. There is no mistake in the paper insertion position. Even if the paper is erroneously inserted, the leading edge of the paper hits the paper insertion preventing member and cannot be inserted. Therefore, it is possible to reliably prevent erroneous paper insertion.

Further, at the time of non-binding operation, the leading end portion of the sheet insertion preventing member is urged by the elastic member so as to close the gap between the handle member and the driver arm. Automatically moves to a position where the paper cannot be inserted by closing the space. Therefore, it is not necessary to move the sheet insertion preventing member to the closing position after the binding operation is completed.

  According to the invention of claim 2, the sheet insertion preventing member is formed in a size that fits in a gap between the handle member and the front and both sides of the driver arm during the binding operation. When the handle member is pushed down and rotated during the binding operation, the paper insertion preventing member fits in the gap between each front part and both side parts of the driver arm and the driver arm. The binding operation can always be performed smoothly without being pinched or bitten.

  According to the invention of claim 3, since the sheet insertion preventing member is pivotally supported by the handle member or the driver arm so as to be swingable, the space between the handle member and the driver arm during non-binding operation. The part can be closed and can be swung and stored between the handle member and the driver arm during the binding operation.

The invention according to claim 4 is capable of preventing the sheet from being inserted into the space between the handle member and the driver arm by the shielding plate portion of the sheet insertion preventing member during the non-binding operation, and during the non-binding operation. The first engagement portion engages with the handle member to regulate the position of the sheet insertion preventing member protruding from the recess, and the second engagement portion engages with the driver arm during the binding operation. Since at least a part of the paper insertion preventing member is accommodated in the recess, the paper insertion preventing member does not adversely affect the peripheral members, and the summary insertion preventing member is always smoothly moved according to the binding operation and the non-closing operation. Can be operated.

The invention according to claim 5 is characterized in that the shielding plate portion includes a front plate portion capable of shielding at least a part of a front portion of the space portion between the handle member and the driver arm, and a side portion of the space portion. Since it has a configuration including a side plate portion capable of shielding at least a part, it is possible to prevent erroneous insertion suitably for both wrong paper insertion from the front side of the driver arm and wrong paper insertion from the side portion. be able to.

In the invention according to claim 6 , since the first engaging portion is a protruding portion formed so as to be engageable with the opening edge of the recess from the tip of the shielding plate portion, the first engaging portion is ensured by a simple structure. In addition, the position of the sheet insertion preventing member can be restricted.

According to a seventh aspect of the present invention, the second engaging portion is an upper plate portion provided on the upper portion of the shielding plate portion, and the upper plate portion is also formed integrally with the shielding plate portion. Therefore, at least a part of the sheet insertion preventing member can be reliably accommodated in the recess of the handle member with a simple structure.

In the invention according to claim 8 , since the elastic member for urging the paper insertion preventing member to protrude from the recess of the handle member is provided, the first engaging portion of the paper insertion preventing member is the handle during the non-closing operation. The paper insertion preventing member is reliably positioned at the protruding position that engages with the opening edge of the recess of the member, so that the paper can be suitably prevented from being inserted into the gap between the handle member and the driver arm.

  Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a flat clinch type stapler according to an embodiment of the present invention.

  In the figure, reference numeral 1 denotes a clincher arm member, 2 denotes a driver arm, 3 denotes a magazine unit for loading staples, and 4 denotes a handle member having a grip portion.

  The clincher arm member 1 includes, for example, a clincher arm cover 5 provided with a hard synthetic resin, and a clincher arm 6 provided substantially horizontally on the upper surface of the clincher arm cover 5 and provided with metal as an example. Yes. Further, the clincher arm member 1 is configured such that a clincher guide member 9 rotates around a base end portion. A binding base portion 10 is formed at the tip of the clincher guide member 9, and the binding portion of the binding paper is positioned on the binding base portion 10.

  A binding hole 10 is provided with a through hole 11 in the vertical direction. A clincher 7 serving as a clincher portion is provided in the through-hole 11 so as to be movable in the vertical direction, and the clincher 7 is provided so as to extend in a substantially vertical direction with respect to the clincher arm 6. On the upper surface of the clincher 7, a clinch groove 7a for bending a leg portion of the staple is formed. The clincher 7 is biased upward by a spring 33.

  An engagement surface 10 a is provided on the lower surface of the clincher guide member 9. Between the clincher guide member 9 and the clincher arm 6, a compression coil spring 13 for biasing the binding base portion 10 side of the clincher guide member 9 upward is interposed.

  That is, the clincher guide member 9 is pivotable about the rear part, and the binding base part 10 at the front end is always urged to the position shown in FIG. Is lowered against the urging force of the compression coil spring 13. The clincher 7 is urged upward by a spring 33 as shown in the drawing, and ascends and descends along the through-hole 11 independently of the clincher guide member 9 with a staple driving operation described later. It is provided freely.

A slide member 15 is slidably disposed on the clincher arm 6 along the front-rear direction of the clincher arm 6. A locking projection 15 is provided at the tip of the slide member 15.
a is provided, and this locking projection 15a is engaged with an engagement surface 10a provided at the lower end of the binding table 10, and the clincher guide member 9 is rotated counterclockwise in FIG. That is, the binding table 10 is prevented from descending.

  The slide member 15 is urged by the spring 34 so that the locking projection 15a and the engagement surface 10a of the binding table 10 are engaged, and the engagement is released when the slide member 15 moves backward against the spring 34. It is configured to be.

  The magazine unit 3 is provided with a pusher (not shown) inside a magazine main body 20 rotatably supported via a shaft portion 16 provided on the side wall of the clincher arm member 1 at the base end portion. A staple launching port 17 is provided at the front end of the magazine body 20, and the loaded staple 18 is pressed forward by a pusher. The magazine unit 3 is urged upward by a compression coil spring 19 provided between the clincher arm 6 and the bottom rear end portion of the magazine unit 3.

  Above the magazine body 20, a staple presser 21 that is rotatably supported by the shaft portion 16 at the base end portion is disposed.

  A driver 22 for driving out staples is provided at the tip of the driver arm 2. The rear end portion of the driver arm 2 is pivotally supported by the rear end portion of the clincher arm member 1 through the shaft portion 16 together with the magazine unit 3. The driver arm 2 is biased upward of the magazine unit 3 by a leaf spring 29. Further, one end of a substantially L-shaped link member 23 is pivotally supported by the shaft portion 24 in the driver arm 2. The other end portion of the link member 23 can be engaged with the upright pieces 15b on both sides of the rear end of the slide member 15. That is, when the driver arm 2 is closed with respect to the clincher arm member 1 around the shaft portion 16 by a grip operation of the handle member 4, the other end portion of the link member 23 is moved and the standing piece 15 b of the slide member 15 is moved. Is pushed backward to retract the slide member 15 against the spring 34. As a result, the engagement state between the engaging projection 15a provided at the tip of the slide member 15 and the engagement surface 10a provided at the tip of the clincher guide member 9 is released.

  The handle member 4 is formed by integrally attaching a cover 4b made of a synthetic resin as an example to the outer surface side of a metal plate 4a as an example whose cross section is bent into a substantially U-shape. The unit 3 and the driver arm 2 are pivotally supported by a shaft portion 25 provided on the side wall of the clincher arm member 1 further on the distal end side than the shaft support position. Further, further on the distal end side than the shaft support position of the handle member 4, a common shaft pin 26 penetrates both side walls and both side walls of the driver arm 2, thereby constituting a booster mechanism.

  That is, when the handle member 4 is gripped, the handle member 4 is rotated about the shaft portion 25 to move the shaft pin 26 downward, so that the driver arm 2 is pushed down toward the clincher arm member 1. Thus, the driver 22 pushes the most advanced staple 18 toward the clincher 7 side. As described above, the distance between the shaft 25 serving as the fulcrum and the shaft pin 26 serving as the action point is short, and the distance between the tip of the handle member 4 serving as the power point and the shaft 25 is long. Even so, a large force is applied to the shaft pin 26.

  Next, a space portion 27 is formed between the handle member 4 and the driver arm 2. Further, a gap is also formed between the front portion 4c of the handle member 4 and the front portion of the driver arm 2 (driver 22), and the side portions 2a and 2a on both sides of the driver arm 2 and the side portions 4d and 4d on both sides of the handle member 4. Is formed.

  A paper insertion preventing member 28 is provided in the space 27 between the handle member 4 and the driver arm 2. As shown in FIG. 3, the sheet insertion preventing member 28 has a front plate portion 28a that forms part of the shielding plate portion and side plate portions 28b and 28b on both sides that form part of the shielding plate portion in plan view. The front plate portion 28a and the side plate portions 28b on both sides are connected to the front portion 4c of the handle member 4 and the driver arm 2. The front portion (driver 22) and the side portions 2a, 2a on both sides of the driver arm 2 and the side portions 4d, 4d on both sides of the handle member 4 are formed to fit in the gap 27.

  The front plate portion 28a constituting a part of the shielding plate portion only needs to be able to shield at least a part of the front portion of the space portion 27 between the handle member 4 and the driver arm 2, and the side plate. It suffices that the portions 28 b and 28 b can shield at least a part of the side portion of the space portion 27.

  The rear end of the paper insertion preventing member 28 is pivotally supported by a pin 30 serving as a pivotal support provided on the side wall of the handle member 4. Further, one end of a leaf spring 32 as an elastic member is fixed to the upper plate portion 28c, and the other end of the leaf spring 32 is engaged with the back surface of the handle member 4, thereby interposing the paper insertion preventing member 28. In the non-binding operation state always shown in FIG. 1 by the leaf spring 32, the sheet insertion preventing member 28 protrudes downward from the recess 4 e of the handle member 4 to form a space 27 between the driver arm 2 and the handle member 4. Energized to shield. Then, the protrusion position of the paper insertion preventing member 28 is formed by the engagement of the protrusion 28d formed to protrude from the tip of the paper insertion preventing member 28 and the opening edge 4f formed at the opening end of the recess 4e of the handle member 4. Is regulated. The upper plate portion 28c is disposed so as to be able to contact the upper surface of the driver arm 2. Therefore, as will be described later, when the handle member 4 is rotated downward during the binding operation, the paper insertion preventing member 28 also moves downward, and the upper plate portion 28c abuts against the upper surface of the driver arm 2. When the member 4 is rotated downward, the protrusion 28d of the paper insertion preventing member 28 is separated from the opening edge 4f of the handle member 4 and resists the bias of the leaf spring 32, so that at least a part of the paper insertion preventing member 28 is provided. Moves so as to be accommodated in the recess 4e.

  As described above, the front plate portion 28a or the side plate portions 28b and 28b constituting a part of the shielding plate portion engages with the handle member 4 during the non-binding operation and protrudes from the recess 4e. A first engagement portion (engagement portion 28d) that regulates the position of 28, and a second engagement that engages with the driver arm 2 during the binding operation to accommodate the paper insertion preventing member 28 in the recess 4e. Part (upper plate part 28c).

  The first engagement portion and the second engagement portion may be configured to engage with the handle member 4 and the driver arm 2, respectively, and are not limited to the above-described embodiment. For example, the first engaging portion does not have to be the protruding portion 28d formed at the tip of the paper insertion preventing member 28, and may be a protruding portion formed on the side portion. Further, the second engagement portion may be configured to engage the driver arm 2 by forming a protrusion on the side plate portion 28b instead of the upper plate portion 28c.

  Next, the operation of the stapler configured as described above will be described. First, in a standby state where the handle member 4 is not pushed down before the binding operation starts, when the magazine unit 3 and the driver arm 2 are lifted and opened above the clincher arm member 1 by the compression coil spring 19, the driver arm 2 The handle member 4 that is axially connected by the shaft pin 26 is also rotated upwardly of the driver arm 2 to be in an open state. The space 27 between the driver arm 2 and the tip of the handle member 4 is closed by a sheet insertion preventing member 28 that protrudes below the handle member 4 by a leaf spring 32. Accordingly, only the clincher arm member 1 and the magazine unit 3 are open, and the upper portion thereof is closed, so that the position for inserting the paper is not mistaken. Even if the paper P is erroneously inserted, the leading edge of the paper hits the paper insertion preventing member 28 and cannot be inserted into the space 27. Therefore, it is possible to reliably prevent erroneous paper insertion.

  Next, as shown in FIG. 2, in the binding operation, after inserting and placing a sheet (not shown) as a member to be bound on the binding base unit 10, the handle member 4 is pushed down and rotated by a gripping operation. Then, the driver arm 2 is pushed down via the shaft pin 26, and the magazine unit 3 rotates together with the driver arm 2 about the shaft portion 16 in the counterclockwise direction in FIG. 1 until the staple launching port 17 contacts the paper P. Move. When the handle member 4 is further lowered after the staple launching port 17 comes into contact with the sheet, the staple 18 loaded in the magazine unit 3 is ejected from the staple launching port 17 by the driver 22, and as a result, the leg of the staple is loaded. The part penetrates the sheet and further contacts the clincher 7 in the through hole 11, and pushes the clincher 7 against the spring 33. At the same time, as the driver arm 2 descends, the link member 23 rotates counterclockwise about the shaft portion 24, so that the other end portion retracts the slide member 15 against the biasing force of the spring 34. Thereby, the engagement state of the engagement surface 10a of the binding table 10 and the locking projection 15a of the slide member 15 is released, and the clincher guide member 9 is lowered while rotating. On the other hand, since the clincher 7 can no longer be lowered, the leg portion of the staple hits the clinching groove 7a of the clincher 7 and is bent sharply. Next, after the handle member 4 is released and returned to the state shown in FIG. 1, the sheet is taken out from the binding table 10. Thereby, one binding operation is completed.

  As described above, when the handle member 4 is pushed down and rotates, the front plate portion 28a and the side plate portions 28b on both sides of the paper insertion preventing member 28 are respectively connected to the front portion 4c of the handle member 4 and the driver arm 2. Between the front portion (driver 22) and the gap between the side portions 4d and 4d on both sides of the handle member 4 and the side portions 2a and 2a of the driver arm 2. 28 is not sandwiched or bitten between the handle member 4 and the driver arm 2. Further, even when the handle member 4 is rotated to the maximum and the front end thereof is closest to the clincher arm member 1, the paper insertion preventing member 28 is such that the upper plate portion 28 c of the paper insertion preventing member 28 is on the front end side of the driver arm 2. , The engagement between the engaging portion 28d and the opening edge 4f is released, and a part of the sheet insertion preventing member 28 is accommodated in the recess 4e. Therefore, it is possible to always perform a smooth binding operation without causing any adverse effects on the peripheral members. Further, since the paper insertion preventing member 28 is located above the lower end of the magazine unit 3, the paper insertion preventing member 28 does not hit the surface of the bound paper, and the binding operation can be performed smoothly at all times.

  Note that the attachment mode of the sheet insertion preventing member is not limited to the above-described embodiment. For example, the structure attached to a driver arm or a staple presser may be sufficient.

  Further, the sheet insertion preventing member may be plate-shaped and fixed to the back surface of the front end portion of the handle member.

The longitudinal cross-sectional view which shows the main structure part of the stapler of this invention A longitudinal sectional view showing a clinch state by the handle member pushing operation of the stapler and showing a side surface of the paper insertion preventing member that is not cut. Perspective view of paper insertion prevention member

DESCRIPTION OF SYMBOLS 1 Clincher arm member 2 Driver arm 3 Magazine unit 4 Handle member 27 Space part 28 Paper insertion prevention member

Claims (8)

At the rear end of the clincher arm member having a clincher portion for bending the leg portion of the staple at the front end, a driver arm having a driver for driving staples at the front end and the rear end of the magazine unit for loading the staple The rear end of the handle member positioned on the opposite side of the magazine unit with respect to the driver arm is pivotally supported from the pivot position of the clincher arm member to the front end side, and the handle member is boosted. Operatively connected to the driver arm through a mechanism, and by rotating the handle member, the driver is lowered together with the driver arm by the boosting mechanism to penetrate the staple leg with respect to the binding member, and A staple that performs a binding operation by bending the clincher portion along the back surface of the member to be bound. In Pura, the paper insertion preventing member prevents the paper into the space portion is inserted between the handle member and the driver arm is provided, the paper insertion preventing member, when in a non-binding operation, tip said handle member A stapler that is biased by an elastic member so as to close a gap between the driver arm and the driver arm .   2. The sheet insertion preventing member according to claim 1, wherein the sheet insertion preventing member is formed in a size that fits in a gap between the handle member and the front and both sides of the driver arm during a binding operation. Stapler.   The stapler according to claim 1 or 2, wherein the paper insertion preventing member is pivotally supported by the handle member or the driver arm so as to be swingable.   The handle member is provided with a recess capable of accommodating at least a part of the paper insertion preventing member, and the paper insertion preventing member is pivotally supported at one end side by the handle member or the driver arm so as to be swingable. The side plate is provided so as to be able to protrude from the recess, and has a shielding plate portion that can shield at least a part of the space between the handle member and the driver arm. A first engagement portion that engages with the handle member during binding operation and regulates the position of the paper insertion preventing member protruding from the recess, and engages with the driver arm during binding operation to insert the paper The stapler according to claim 1, wherein a second engagement portion that accommodates a prevention member in the recess is formed. The shielding plate part includes a front plate part capable of shielding at least a part of a front part of a space part between the handle member and the driver arm, and a side plate capable of shielding at least a part of a side part of the space part. The stapler according to claim 4 , further comprising a portion. 5. The stapler according to claim 4 , wherein the first engaging portion is a protruding portion that is formed so as to be able to engage with an opening edge of the recess from a tip of the shielding plate portion. The stapler according to claim 4 , wherein the second engagement portion is an upper plate portion provided on an upper portion of the shielding plate portion. The stapler according to any one of claims 4 to 7 , wherein the sheet insertion preventing member is urged by an elastic member so as to protrude from the recess of the handle member during a non-binding operation.

Images