JP2012166340A - Stapler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stapler that reduces a sound pressure during stapling, and emits an ear-friendly sound.SOLUTION: The stapler includes: a coil spring provided between a bottom portion of a clincher guide 20a and a top portion of a clincher arm 1 to bias the clincher guide 20a upward; a spring 1i provided between the top portion of a clincher arm 1 on which the coil spring is provided and a bottom portion of a movable clincher 1h to bias the clincher 1h upward; and a clincher bumper 60 provided at least in a butt portion where the clincher 1h and the clincher arm 1 butt each other, to shock-absorb the clincher 1h upward biased by spring 1i. A predetermined gap W is formed between a surface on a side on which the clincher bumper 60 butts the clincher 1h and a surface on a side on which the clincher 1h butts the clincher bumper 60.

Description

  The present invention relates to a stapler that bends staples based on a predetermined binding force to bind sheets. Specifically, a binding member that cushions the shock, a binding arm portion that bends the staple by a movable needle bending portion and binds the paper, and a binding that guides the needle bending portion and is pushed down in response to the operation of the driving arm portion. By providing the buffer member at the abutting portion with the guide portion, the sound pressure when binding the staples can be reduced by the buffer member and the sound can be made unharsh.

  2. Description of the Related Art Conventionally, when binding a bundle of sheets, there are many cases where staples are driven into the bundle of sheets by a stapler to bind the bundle of sheets. The stapler includes a clincher arm, a clincher, a clincher guide, a magazine, a pusher, a driver arm, a driver, a handle, and the like, and presses and biases the staple loaded in the magazine to the staple punching port by the pusher.

  When a binding force is applied to the clincher arm, magazine, and driver arm, each having a bearing portion and sharing the main shaft, via the handle, the driver at the tip of the driver arm staples the topmost staple loaded in the magazine. It is made to come out at the exit.

  The staple driven out from the magazine descends while keeping the leg portion of the staple in a linear shape while pushing down the vertically movable clincher. When descending, the leg of the staple penetrates the paper sandwiched between the magazine and the clincher guide.

  After the staple legs penetrate the paper, the clincher guide is disengaged in response to the operation of the driver arm, and the clincher guide is pushed down by the magazine and lowered. At this time, since the leg portion of the staple is in contact with the clincher at the tip of the clincher arm, the tip of the staple is bent into a flat shape. When this operation is executed with a sheet bundle or the like sandwiched between the staple punching outlet of the magazine and the clincher, the sheet bundle can be bound into a glass shape or a flat shape with staples.

  In connection with such a conventional example, Patent Document 1 discloses a stapler having a clincher guide. According to this stapler, first, the binding sheet is sandwiched between the lower surface of the magazine and the clincher guide, and then the leading staple of the magazine is driven out by a driver. At this time, the leg portion of the staple penetrates the sheet while maintaining the linear shape. Thereafter, the clincher guide descends and the leg portion of the staple is bent by the clincher groove. As a result, the accuracy of stapling of the staples can be improved.

  Patent Document 2 discloses a stapler provided with a clincher that can move up and down. According to this stapler, the clincher urged upward by the spring attached to the clincher arm is guided to the clincher guide. With this configuration, both the clincher and the clincher guide are pushed down in response to the operation of the handle.

Japanese Unexamined Patent Application Publication No. 2004-230483 (7th and 8th pages, FIGS. 5 to 8) Japanese Patent Laying-Open No. 2003-311646 (FIG. 2)

  By the way, according to the conventional example and the stapler according to Patent Document 1, in order to improve the accuracy of stapling of the paper through the staple, the leg of the stapler is passed through the paper while maintaining the straight shape of the leg of the stapler by the clincher guide. ing. However, there is a problem that noise is generated when the clutch of the clincher guide is disconnected and the clincher guide is lowered. This noise is caused by the collision between the tip of the clincher guide and the tip of the clincher arm when the clincher guide is lowered. This noise is often felt annoying when the number of spells increases.

  In addition, there is a problem in that noise occurs due to a collision between a drive arm portion for driving staples based on the spelling force and an operation unit operated to apply the spelling force to the drive arm portion.

  Further, according to the stapler according to Patent Document 2, when the clincher is pushed down in response to the operation of the handle, there is a problem that the clincher collides with the clincher arm to generate noise.

  SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the problems associated with the conventional example, and it is an object of the present invention to provide a staple that can reduce the sound pressure when binding the staple and can make the sound unharmful. And

  In order to solve the above-described problems, a stapler according to the present invention has a staple ejection outlet for staple ejection at one end, and a drive unit that abuts against a loading unit in which staples are loaded and a staple located at the staple ejection outlet. A drive arm portion that strikes the staple based on a binding force, and a movable needle bending portion that bends the staple at one end, and is driven from the staple punching port by the drive portion. A binding arm portion that bends the staple at the needle bending portion and binds the paper; a binding guide portion that is provided on the binding arm portion so as to be able to guide the needle bending portion and is pushed down in response to an operation of the driving arm portion; A first spring provided between a lower portion of the binding guide portion and an upper portion of the binding arm portion and biasing the binding guide portion upward; and the binding provided with the first spring. A second spring provided between an upper portion of the needle portion and a lower portion of the needle bend portion, and a contact portion where at least the needle bend portion and the binding arm portion are in contact with each other. A buffer member for buffering the needle curved portion biased upward by the second spring, and a surface of the buffer member that contacts the needle curved portion and the needle curved portion A predetermined gap is provided between the surface abutting against the buffer member.

  According to the stapler of the present invention, the drive arm portion drives the staples based on the spelling force by the drive unit that contacts the staples positioned at the staple punching outlet of the loading unit. The binding arm portion binds the paper by bending the staple punched out from the staple punching port by the driving unit with a movable needle bending portion. The binding guide is pushed down in response to the operation of the drive arm. A first spring is provided between the lower part of the binding guide part and the upper part of the binding arm part, and the binding guide part is biased upward by the first spring. The second spring is provided between the upper portion of the binding arm portion where the first spring is provided and the lower portion of the needle bending portion, and the needle bending portion is attached upward by the second spring. Be forced. In this binding guide portion, a buffer member is provided at a contact portion where the needle bending portion and the binding arm portion contact each other, and the needle bending portion biased upward by the second spring is buffered. As a result, the needle bending portion and the binding arm portion come into contact with each other via the buffer member, so that the sound pressure when the staple is bound can be reduced.

  According to the stapler according to the present invention, the binding guide portion biased upward by the first spring and the binding arm portion provided with the second spring biasing the movable needle bending portion upward are provided. A buffer portion is provided in the abutting portion that abuts, and a predetermined gap is provided between a surface of the buffer member that contacts the needle bending portion and a surface of the needle bending portion that contacts the buffer member.

  By this gap, the needle-curved portion can be moved up and down, and the impact when the needle-curved portion comes into contact with the binding arm portion can be absorbed. As a result, the sound pressure at the time of binding the staples can be reduced and the high frequency can be reduced, so that the sound is not harsh.

It is sectional drawing which shows the structural example of the stapler 100 as embodiment which concerns on this invention. (A) And (B) is explanatory drawing which shows the example of a function of the clincher bumper 60 (the 1). (A) And (B) is explanatory drawing which shows the example of a function of the clincher bumper 60 (the 2). FIG. 6 is a perspective view illustrating a configuration example (No. 1) of the staple 30; (A) And (B) is a perspective view which shows the structural example (the 2) of the staple 30. FIG. (A)-(C) is a front view showing a comparative example of staples 30 ′, 30 ″, 30. (A) And (B) is a front view which shows the operation example of the staple 30. FIG. (A) And (B) is a front view which shows the operation example of staple 30 '' '. 3 is a perspective view showing a configuration example of parts related to a magazine 3. FIG. 3 is an exploded perspective view showing an example of assembling parts related to a magazine 3. FIG. (A) And (B) is explanatory drawing which shows the example of attachment of the needle clamp 40 (the 1). (A) And (B) is explanatory drawing which shows the example of attachment of the needle clamp 40 (the 2). (A) And (B) is explanatory drawing which shows the example of attachment of the staple guide 50 (the 1). (A) And (B) is a YY arrow sectional drawing which shows the example of attachment of the staple guide 50 (the 2). It is a perspective view which shows the structural example of the pusher. (A)-(C) are explanatory drawings which show the example of attachment of the pusher 6. FIG. (A) And (B) is a side view which shows the structural example of the pusher 6 '. (A) And (B) is explanatory drawing which shows the structural example of the driver 5. FIG. FIG. 4 is a perspective view showing an arrangement example of a driver 5 and a magazine 3. (A)-(D) are front views which show the operation example (the 1) of the driver 5 and the staple guide 50. FIG. (A)-(D) are side views which show the operation example (the 2) of the driver 5 and the staple guide 50. FIG. (A)-(D) are side views which show the operation example of the driver 5 and the needle presser 40. FIG. It is a perspective view which shows the example of mounting | wearing of the clincher bumper 60. FIG. 2 is an exploded perspective view showing a configuration and an assembly example of a clincher bumper 60. FIG. (A)-(C) are explanatory drawings which show the example of attachment of the clincher bumper 60. FIG. FIG. 5 is a perspective view showing an example of mounting the handle bumper 64. It is a disassembled perspective view which shows the structure of the handle bumper 64, and an assembly example (the 1). It is a disassembled perspective view which shows the structure of the handle bumper 64, and an assembly example (the 2). (A)-(C) are explanatory drawings which show the example of attachment of the handle bumper 64. FIG. (A) And (B) is explanatory drawing which shows the structural example of the coil springs 10, 20c, and 20d. 3 is an exploded perspective view showing an assembly example of the coil spring 10. FIG. FIG. 6 is a perspective view illustrating a configuration example (No. 1) of a back cover. (A)-(C) is explanatory drawing which shows the structural example (the 2) of the back cover 15. FIG. (A) And (B) is a perspective view which shows the example of mounting | wearing of the back cover 15 (the 1). (A) And (B) is explanatory drawing which shows the example of mounting | wearing of the back cover 15 (the 2). (A) And (B) is explanatory drawing which shows the example (the 3) with which the back cover 15 is mounted | worn. (A) And (B) is sectional drawing which shows the operation example of the stapler 100. FIG.

  Hereinafter, a stapler and staples according to embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a configuration example of a stapler 100 as an embodiment according to the present invention.

  A stapler 100 shown in FIG. 1 is a portable small stapler. As shown in FIG. 4, the stapler 100 has staples (needles) 30 that are larger in size than JIS standard No. 10 staples and smaller in size than JIS standard No. 3 staples. It is assumed that the intermediate size staple 30 of the No. 3 staple is adapted and used.

  The stapler 100 has a function of binding the staples 30 based on a predetermined binding force. The stapler 100 has a clincher arm 1. The clincher arm 1 constitutes an example of a binding arm portion, is formed by bending a metal plate so as to have a bottom plate surface and both side surfaces, and constitutes a main body base portion of the stapler 100. A clincher portion 1 s is attached to the tip of the clincher arm 1. The clincher portion 1s includes a clincher 1h having an upper end surface formed in a groove shape, and a spring (not shown) that urges the clincher 1h upward. The groove shape of the upper end surface of the clincher 1h has a functional structure that bends the leg portion 30b (see FIG. 4) of the staple 30 into a glasses shape or a flat shape. In addition, the clincher 1h having the configuration illustrated in the embodiment is an example suitable for bending the leg portion 30b of the staple 30 into a flat shape.

  Further, the clincher 1h is provided with a groove portion on the same straight line, and a straight bent structure (in-line clincher method) in which the leg portion 30b is bent along the same straight line, or a groove portion is provided on two straight lines. The tip part of the leg part 30b is bent by the groove part so that the tip parts do not face each other. In this example, the inline clincher method is applied to the clincher 1h.

  The clincher 1h biased upward is positioned in contact with the opening of the clincher guide portion 20. In this example, the upper end surface of the clincher 1 h is set at a position (top dead center) substantially equal to the opening surface of the clincher guide portion 20.

  The clincher guide portion 20 constitutes an example of a binding guide portion, and is attached to the clincher arm 1 to guide the clincher 1h. The clincher guide unit 20 temporarily holds an interval between the magazine 3 and the clincher 1h when the staple 30 is driven out from the staple punching outlet 12 of the magazine 3, and then an operation lever attached to the driver arm 4 It is operated by 5a and pushed down by the magazine 3.

  The clincher guide portion 20 includes a clincher guide 20a, a slide member 20b, and coil springs 20c (first springs) and 20d. The clincher guide 20a constitutes an example of a binding guide body, and has an engaging claw (not shown) at the rear end of the clincher guide 20a. The engaging claw rotates around the edge of an opening (not shown) of the clincher arm 1. It is movably engaged. The clincher guide 20a is biased upward by a coil spring 20c. At the tip of the clincher guide 20a, a contact column 20e extending in a substantially vertical direction from the main body of the clincher guide 20a is provided. The abutment column 20e is abutted and supported by a support portion 20f of a slide member (an example of a slide member) 20b that is slidably attached. Thereby, the clincher guide 20a is locked by the slide member 20b. The slide member 20b is biased forward by a coil spring 20d. In this way, the clincher guide portion 20 is configured.

  The back surface side of the clincher arm 1 is worn so as to be covered with a synthetic resin clincher arm cover (hereinafter referred to as a clincher cover 2) having a design shape. A magazine 3 that constitutes an example of a loading unit is rotatably attached to the clincher arm 1. The magazine 3 has a main frame 3a (see FIG. 9) having a predetermined shape. The magazine 3 has a staple punching port 12 at the front end of the main frame 3a, and has a hole for driving shaft fulcrum (hereinafter referred to as holes 3b and 3c) at the other end, and staples 30 are loaded. .

  On the rear side of the magazine 3, a main shaft pin (hereinafter referred to as a main pin 21) is engaged with the holes 3 b and 3 c of the clincher arm 1. The magazine 3 can be loaded with a series or two series of staple series 300 (see FIG. 4) having a series of bonded numbers of 50.

  In the magazine 3, a pusher 6 constituting an example of a pressing portion is slidably engaged with (slidably fitted with) the spring guide 6 a, and the staple 30 loaded in the magazine 3 is directed toward the staple punching outlet 12 at the tip. Operates to press.

  A coil spring 10 is disposed between the rear side of the magazine 3 and the rear side of the clincher arm 1. The coil spring 10 holds a predetermined gap between the clincher 1h and the staple punching port 12 in order to interpose a sheet bundle between the clincher arm 1 and the magazine 3.

  A driver arm 4 constituting an example of a drive arm portion is rotatably attached to the main pin 21 described above. The driver arm 4 has a main body frame. The main body frame is formed by bending a metal plate so as to have a top plate surface and both side surfaces. The driver arm 4 has a driver 5 (an example of a drive unit) at one end (front end) and a hole for receiving the main pin 21 (first drive shaft fulcrum) at the other end (rear end). have.

  The driver 5 has a substantially L shape having elasticity, and the main body portion of the driver 5 is attached in close contact with the top plate surface of the driver arm main body frame, and the tip portion of the driver 5 is the main body frame. It is mounted approximately perpendicular to the top plate surface. The rear end portion of the driver 5 is curved in a direction away from the top plate surface, and the curved elastic portion 5c (see FIG. 18A) contacts the staple cover 7 mounted on the magazine 3. Thereby, the intervals between the driver 5 and driver arm 4 and the magazine 3 can be kept constant during standby. The staple cover 7 constitutes an example of a loading covering portion, shares the main pin 21 at the rear end, and covers the staple 30 of the magazine 3.

  When the driver arm 4 is rotated in the direction in which the staple 30 is bound (counterclockwise), the rear end portion of the elastic driver 5 approaches the driver arm 4 and the driver 5 enters the inside of the magazine 3. . The driver 5 is brought into contact with the top of the top of the staple 30 pressed by the pusher 6 and is driven by pressing down on the top of the staple 30 with a pressing force applied to the driver arm 4.

  A staple cover 7 is installed on the magazine 3 inside the main body frame of the driver arm 4 so that the staples 30 loaded in the magazine 3 are pressed downward. The staple cover 7 is rotatably attached to the main pin 21. In this example, the end portion of the staple cover 7 has a U shape and is rotatably engaged so as to cover the main pin 21.

  A handle 8 constituting an example of an operation unit is provided above the driver arm 4 and operated to apply a binding force to the driver 5 of the driver arm 4. The handle 8 has a main frame 8a (see FIG. 27) formed by bending a metal plate so as to have a top plate surface and both side surfaces.

  A handle cover 9 that constitutes an example of an operation covering portion is provided on the upper portion of the handle 8, and is worn so as to cover the surface of the main frame 8 a of the handle 8. As with the clincher cover 2, the handle cover 9 is composed of a synthetic resin-made shaping frame having a design shape.

  The handle 8 and the handle cover 9 are rotatably engaged (pivoted) at a rear end portion thereof by a second drive shaft fulcrum portion (hereinafter referred to as a connection shaft 22) disposed above the main pin 21. . The connecting shaft 22 includes, for example, a convex shaft portion 22a (see FIG. 25) provided in a ring shape on the sheet metal side surface of the clincher arm 1 by burring or the like, and a U-shaped bearing portion provided on the sheet metal side surface of the handle 8. 22b (see FIG. 27).

  In addition, an action point q for pressing the driver arm 4 is set on the way from the connecting shaft 22 of the handle 8 and the handle cover 9 to its tip (in the direction of staple punching). The action point q is provided with a pin for action point (hereinafter referred to as action pin 23) for freely engaging the handle 8 and the driver arm 4.

  As described above, when the position of the connection shaft 22 is set higher than the position of the main pin 21 shared by the magazine 3 and the driver arm 4, the connection shaft is obtained when the tips of the handle 8 and the handle cover 9 are set to the force point p. 22 serves as a fulcrum, and the staple 30 can be bound with a small depressing force with the force point p of the handle cover 9 while depressing the driver arm 4 at the operating point q (a boosting mechanism).

  In this example, a back cover 15 is provided at the rear end portion of the stapler 100 in which the magazine 3, the driver arm 4, the main pins 21 of the staple cover 7, the connection shaft 22 of the handle 8 and the handle cover 9, and the like are configured. . The back cover 15 can prevent a foreign matter from entering an opening formed in a rear end side portion of the clincher cover 2 and the handle cover 9 and constitutes the stapler 100 having an aesthetic appearance. it can.

  Next, the operation of the stapler 100 will be described. When the handle 8 is pushed down from above the handle cover 9, the handle 8 rotates about the connecting shaft 22 and pushes down the action pin 23. When the action pin 23 is pressed, the driver arm 4 and the magazine 3 rotate around the main pin 21, and the front end of the magazine 3 comes into contact with the front end side of the clincher guide 20a. When the handle 8 is further pushed down from this state, the handle 8 and the driver arm 4 are rotated while the positions of the magazine 3 and the clincher guide 20a are fixed, and the driver 5 at the tip of the driver arm 4 is moved to the magazine 3. The leading staple 30 is driven out from the inside of the magazine 3 through the staple punching hole 12 to the outside. The staple 30 that has been struck down descends while maintaining the straight state of the leg portion 30b and resists the urging force of a spring 1i (first spring; see FIG. 2A) that urges the clincher 1h upward. Press down.

  Thereafter, when the handle 8 is further pushed down, the operation lever 5a attached to the driver arm 4 rotates counterclockwise, and the slide member 20b is retracted backward by the tip of the operation lever 5a. By the retraction movement of the slide member 20b, the contact column 20e of the clincher guide 20a supported by the support portion 20f of the slide member 20b is brought into a free state (clutch disengaged state), and the handle 8, the driver 5 and the magazine 3 are rotated. At the same time, the clincher guide 20a is pushed down through the magazine 3 and rotated. The clincher 1h is also pushed down to the bottom dead center. At this time, the staple 30 in contact with the driver 5 is bent into a flat shape by the rotation of the driver 5 and the clincher 1h located at the bottom dead center. In this way, the binding process of the staple 30 is performed.

  In the binding process of the staple 30, the clincher 1h pushed down in response to the operation of the handle 8 is supported by the clincher arm 1 to set the bottom dead center of the clincher 1h. In this case, a clincher bumper 60 for buffering the contact is provided at the contact portion between the clincher 1h and the clincher arm 1 in order to avoid an event in which the clincher 1h collides with the clincher arm 1 and generates noise. ing. The clincher bumper 60 constitutes an example of a buffer member.

  2A and 2B and FIGS. 3A and 3B are explanatory views showing an example of the function of the clincher bumper 60. FIG. FIG. 2A is an enlarged cross-sectional view of a main part of the stapler 100. 2B is a cross-sectional view of the main part of the stapler 100 shown in FIG. 2A as viewed in the direction of arrows X8-X8.

  In the stapler 100 shown in FIG. 2A, the driver arm 4 is pushed down, and the driver 5 drives the leading staple 30 of the magazine 3 halfway. As shown in FIG. 2B, the staple 30 driven out from the magazine 3 passes through the sheet bundle P sandwiched between the magazine 3 and the clincher guide 20a, and slightly pushes down the clincher 1h.

  A gap W is provided between the clincher 1h urged upward by the spring 1i shown in FIG. 2B and the clincher arm 1 so that the clincher 1h moves up and down. The gap W varies depending on the vertical position of the clincher 1h. In this example, the clincher bumper 60 is attached to the tip of the clincher arm 1. The bottom surface portion 1j of the clincher 1h contacts the clincher contact portion 60c of the clincher bumper 60.

  FIG. 3A is an enlarged cross-sectional view of a main part of the stapler 100. 3B is a cross-sectional view of the main part of the stapler 100 shown in FIG. 3A as viewed in the direction of arrows X9-X9. The stapler 100 shown in FIGS. 3A and 3B is a state where the driver arm 4 is further pushed down from the state shown in FIGS. 2A and 2B.

  At this time, the operation lever 5a attached to the driver arm 4 shown in FIG. 3A moves the slide member 20b backward by the tip of the operation lever 5a. By the retreating movement of the slide member 20b, the contact column 20e of the clincher guide 20a supported by the support portion 20f of the slide member 20b is brought into a clutch disengaged state.

  In this clutch disengaged state, the clincher guide 20 a and the clincher 1 h are pushed down through the magazine 3 as the driver arm 4 rotates. As shown in FIG. 3B, the clincher 1 h pushed down by the magazine 3 comes into contact with the clincher contact portion 60 c of the clincher bumper 60 attached to the clincher arm 1.

  After the abutment, the staple 30 abutted on the driver 5 binds the sheet bundle P by folding the front end of the staple 30 into a flat shape by the rotation of the driver 5 and the clincher 1h located at the bottom dead center.

  Thus, the clincher 1h and the clincher arm 1 come into contact with each other via the clincher bumper 60. Thereby, since the sound pressure at the time of binding the staple 30 can be reduced and the high frequency can be reduced, the sound can be made unharsh.

  Next, the configuration of the staple 30 will be described. FIG. 4 is a perspective view showing a configuration example (No. 1) of the staple 30. Each of the staples 30 shown in FIG. 4 is bonded in series to form a staple series 300 composed of 50 pieces. The staple 3 is loaded in the magazine 3 in a state of 300.

  The staple 30 is larger in size than the JIS standard No. 10 staple 30 'shown in FIG. 6A and smaller in size than the JIS standard No. 3 staple 30 "shown in FIG. 6B. It consists of a crown portion 30a and a pair of leg portions 30b extending from both ends of the crown portion 30a.

  5A and 5B are explanatory views showing a configuration example (No. 2) of the staple 30. FIG. The staple 30 shown in FIG. 5A is a view of the staple 30 shown in FIG. 4 as viewed from above. The staple 30 shown in FIG. 5B is a view of the staple 30 shown in FIG. 4 as viewed from the front. When the total length of the inner width L5 of the pair of leg portions 30b shown in FIG. 5B and the thickness L4 of each leg portion 30b is the total length L1 of the crown portion 30a in the staple 30, the entire length of the crown portion 30a L1 is longer than 9.48 mm and shorter than 12.45 mm, and the sum of a pair of lengths L2 of the legs 30b of the staple 30 is equal to or less than the total length L1 of the crown 30a. It is formed. Further, the front-rear width L3 of the crown portion 30a is formed to be thicker than 0.47 mm and thinner than 0.53 mm, and the thickness L4 of each leg portion 30b is thicker than 0.30 mm and from 0.54 mm. Is also formed thin.

  6A to 6C are front views showing comparative examples of the staples 30 ', 30 "and 30. The JIS standard No. 10 staple 30' shown in FIG. The total length L1 ′ of 30a ′ is defined as 9.48 mm or less, the inner width L5 ′ of the pair of leg portions 30b ′ is defined as 8.40 mm or more, and the length L2 ′ of the leg portions 30b ′ is 4. .8 ± 0.2 mm, the thickness L4 ′ of each leg 30b ′ is defined as 0.30 mm or more, and the front-rear width is defined as 0.50 mm ± 0.03 mm.

  On the other hand, the JIS standard No. 3 staple 30 ″ shown in FIG. 6B assumes that the number of sheets to be bound is about 30, the length of the crown portion 30a ″ is 12.97 mm or less, and the pair of leg portions 30b. The “inner width L5” is defined to be 11.55 mm or more. In addition, the length L2 ″ of the leg portion 30b ″ is defined as 6.0 ± 0.2 mm, the thickness L4 ″ of each leg portion 30b ″ is defined as 0.45 mm or more, and the front-rear width is 0.70 mm ± It is defined as 0.03 mm.

  The staple 30 shown in FIG. 6C is formed in an intermediate size between the above-mentioned No. 10 staple 30 ′ and No. 3 staple 30 ″. In this example, the crown portion 30a of the staple 30 is No. 10. In the staple 30 ', the crown portion 30a' is formed to be longer than the overall length L1 'by a total length difference M1, and is formed to be shorter than the overall length L1 "of the crown portion 30a" of the No. 3 staple 30 "by a total length difference M2. Yes.

  The total length L1 of the crown portion 30a of the staple 30 is longer than the total length L1 ′ and shorter than the total length L1 ″, that is, a range N1 satisfying L1 ′ <L1 <L1 ″ (0 mm <N1 <2.97 mm). ). This maximum value 2.97 mm is calculated by the total length L1 ″ (12.45 mm) −the total length L1 ′ (9.48 mm)). Thus, the total length L1 of the crown portion 30a of the staple 30 is set.

  Further, the length L2 of the leg portion 30b of the staple 30 is formed such that the sum of a pair of the length L2 of the leg portion 30b is equal to or shorter than the total length L1 of the crown portion 30a. In this example, the length L2 of the leg 30b is set longer than the length L2 ′ of the leg 30b ′ by the total length difference M3 and shorter than the length L2 ″ of the leg 30b ″ by the total length difference M4. .

  As described above, since the sizes of the crown portion 30a and the leg portion 30b of the staple 30 are formed to be intermediate sizes in the conventional No. 10 and No. 3 staples, the staple 30 'of the No. 10 cannot be bound from a thin sheet bundle. Up to a bundle of sheets (sheet bundle of 20 or more sheets) can be bound with one type of staple.

  Moreover, since the sum of the lengths L2 of the pair of leg portions 30b of the staple 30 is set to be equal to or less than the total length L1 of the crown portion 30a, a particularly thin sheet bundle is bound when the staple 30 is bound. Even in this case, the tips of the leg portions 30b can be prevented from re-penetrating the paper. Further, it is possible to provide a booklet that looks good without the leg portions 30b of the staples 30 folded on the back surface of the sheet bundle contacting each other.

  Further, in this example, the thickness L4 of the leg 30b of the staple 30, that is, the thickness of the wire rod of the staple 30 is set to be substantially equal to the thickness L4 'of the No. 10 staple 30'. In this example, the front-rear width L3 (see FIG. 5A) of the staple 30 is set to a thickness substantially equal to the front-rear width of the No. 10 staple 30 '. As a result, the binding load can be reduced, and the staple 30 can be easily removed when a jam occurs.

  Further, since the staple 30 is formed using a wire material equivalent to the staple 30 'of No. 10 which is thinner than the wire of the No. 3 staple 30 ", the wire may be conspicuous even in the bound state. Also, the booklet looks good and the staple 30 cannot be loaded on a conventional staple for staple No. 10, so that the problem of using wrong size staples does not occur.

  Further, the staple 30 can be loaded on a conventional staple for No. 3 needle, but since the width of the crown portion is different, it can be immediately determined that the staple is erroneously loaded. Further, the staple 30 can be formed of a material having a large distribution amount and an inexpensive price.

  7A and 7B are front views showing an operation example of the staple 30. FIG. A staple 30 shown in FIG. 7A shows a basic state of a single staple 30. The staple 30 shown in FIG. 7B shows a bent state (clinch state) in which the base of each leg 30b is bent flat by about 90 ° inward from the basic state shown in FIG. 7A. In this bent state, the sum of the lengths of the pair of leg portions 30b (length L2 + length L2) is equal to or shorter than the total length L1 of the crown portion 30a.

  As a result, the tips of the legs 30b in the bent state do not come into contact with each other, so that a thin sheet bundle of about two sheets can be bound. The leg 30b preferably has a length L2 of the leg 30b set to the maximum length where the tips do not contact each other and extends by a total length difference M3 from the leg 30b ′ of the No. 10 staple 30 ′. Therefore, a sheet bundle having a thickness that cannot be bound by the No. 10 staple 30 'can be bound.

  As described above, according to the staple 30 according to the present invention, the total length L1 of the crown portion 30a of the staple 30 is longer than 9.48 mm and shorter than 12.45 mm, and the pair of legs of the staple 30 is formed. The sum of the lengths of the portions 30b is formed to be equal to or shorter than the total length L1 of the crown portion 30a.

  Therefore, a sheet bundle that cannot be bound by a staple 30 'of No. 10 from a thin sheet bundle (sheet bundle of 20 sheets or more) by the staple 30 formed in an intermediate size in the conventional No. 10 and No. 3 staples. Can be bound with one type of staple.

  Further, since the crown portion 30a is formed longer than the crown portion 30a 'of the No. 10 staple 30' by the total length difference M1, the staple 30 cannot be loaded into an existing No. 10 stapler magazine. As a result, if the length of the crown portion 30a ′ of the No. 10 staple 30 ′ is made constant and only the leg portion 30b ′ is extended, the staple in which only the leg portion 30b ′ is accidentally extended is used for the No. 10 staple. By loading the stapler on the stapler, it is possible to avoid the possibility that the stapler for No. 10 malfunctions (for example, the pusher link is broken or the staple cover is not closed properly).

  The staple 30 magazine can be loaded with staples 30. However, the staple 30 is formed so that the crown portion 30a is shorter than the crown portion 30a ″ of the No. 3 staple 30 ″ by the total length difference M2. , It can be immediately determined as a misload.

  Preferably, as shown in FIG. 8A, the length L11 of the crown portion 30a ′ ″ of the staple 30 ′ ″ is formed to be 11.35 mm or more and 11.49 mm or less, and the pair of leg portions 30b ″. The length L21 of each of 'may be 5.7 mm or more and 6.0 mm or less.

  In this case, if the length L21 of the pair of leg portions 30b ′ ″ is 6.0 mm, the relationship of L11 (11.49 mm) <L21 (6 mm) × 2 is obtained, but the staple 30 ′ ″. When clinching and bending, for the sake of clinching, a slight thickness d is generated in the bent portion R (see FIG. 8B), so that the crown portion 30a ′ ″ of the staple 30 ′ ″. This is because it is preferable that a slight extra length exists in the length of the leg 30b ′ ″ of the staple 30 ″ ′ with respect to the length of the staple 30 ″ ′.

  Next, the configuration of the pusher 6 assembled in the magazine 3 of the stapler 100, the needle presser 40 and the staple guide 50 constituting an example of the staple presser will be described. FIG. 9 is a perspective view illustrating a configuration example of parts related to the magazine 3. A staple guide 50 is slidably attached to the bottom surface of the main frame 3a of the magazine 3 shown in FIG. The staple guide 50 constitutes an example of a staple guide portion, and is biased toward the staple punching opening 12 of the magazine 3 by a spring 3i (see FIG. 14A).

  In front of the magazine 3, there is provided a front mounting portion 3d in which a part of the bottom surface of the magazine 3 is bent substantially vertically and the center portion is opened in a circular shape. The tip of a spring guide 6a constituting an example of the guide shaft portion is attached to the circular hole 3f (see FIG. 10) of the front attachment portion 3d. Further, at the rear of the magazine 3, as in the front, a part of the bottom surface of the magazine 3 is bent substantially vertically and a rear mounting portion 3e having a circular opening at the center is provided. The rear end of the spring guide 6a is attached to the circular hole 3g (see FIG. 10) of the rear attachment portion 3e. The rear end of the spring guide 6a is prevented from coming off by a main pin 21 (see FIG. 1) inserted into the holes 3b and 3c of the magazine 3.

  The pusher 6 is inserted into the spring guide 6a and is slidably attached. The pusher 6 is biased toward the staple punching port 12 by a spring spring 6b (biasing member) shown in FIG. 16A, and presses the staple 30 loaded in the magazine 3 toward the staple punching port 12 side.

  Next, a method for assembling the pusher 6, the needle presser 40 and the staple guide 50 in the magazine 3 will be described. FIG. 10 is an exploded perspective view showing an example of assembling the parts related to the magazine 3. The configuration of each part will be described at the same time.

  The magazine 3 shown in FIG. 10 is in a state where nothing is incorporated. An insertion opening 3m (see FIG. 11B) is provided at the base of the front mounting portion 3d of the magazine 3. The insertion portion 50a provided at the tip of the guide main body (an example of the guide main body) 50j of the staple guide 50 is inserted into the insertion opening 3m, and the rectangular shape provided on the bottom surface of the main frame 3a of the magazine 3 is inserted. A spring receiving portion 50c provided on the staple guide 50 is engaged with the opening 3h. Thereafter, one end of a spring 3i (see FIG. 14A) is attached to the spring receiving portion 50c, and the other end of the spring 3i is attached to a spring receiving portion 3k (see FIG. 14A) provided on the bottom surface of the magazine 3.

  The staple guide 50 slides (slides) within the gap between the spring receiving portion 50c and the rectangular opening 3h. This gap is set to be slightly longer than the front-rear width L3 of the staple 30 (see FIG. 5A). This is because, when the leading staple 30 loaded in the magazine 3 is driven and lowered, the staple portion 50 is urged toward the staple discharge port 12 side of the magazine 3 by the crown portion 30a of the staple 30. This is because the staple guide 50 is retracted in contact with the head of the sheet.

  After the staple guide 50 is attached to the magazine 3 in this way, the pusher 6 and the needle presser 40 are attached to the magazine 3. The pusher 6 includes a pusher body 6d and left and right pusher plates 6e. The pusher main body 6d constitutes an example of a pressing portion main body, and is installed inside the staple guide 50. One end of the pusher band 6c (see FIG. 16B) is inserted to fix the pusher band 6c.

  The left and right pusher plates 6 e constitute an example of first and second pressing plates, and are connected to both sides of the pusher body 6 d with the side guide portions 50 d at both ends of the staple guide 50 sandwiched therebetween, and are guided by the staple guide 50. Abuts against the staple 30.

  In the pusher 6, the pusher main body 6d and the left and right pusher plates 6e are integrally formed or formed separately. For example, in the case of the separate body formation, the pusher body 6d is formed by resin injection molding. The pusher plate 6e is formed by, for example, punching a metal plate with a press machine. In the case of the integral molding, the pusher main body 6d and the left and right pusher plates 6e are formed in a state of being connected in advance by, for example, resin injection molding.

  The pusher body 6d molded separately in this example has two protrusions 6f and 6g having different shapes for connecting the pusher plates 6e on both sides. For example, the protrusion 6f is formed in a rectangular parallelepiped, and the protrusion 6g is formed in a shape in which a part of the rectangular parallelepiped is missing. The protrusions 6f and 6g provided on both sides of the pusher body 6d constitute an example of first and second coupling portions.

  These protrusions 6f and 6g have different front and rear arrangements on the left and right sides of the pusher body 6d. In this example, on the left side of the pusher main body 6d, a projection 6f is disposed in front, and a projection 6g is disposed behind. Further, on the right side of the pusher main body 6d, a projection 6g is disposed in front, and a projection 6f is disposed behind.

  The pusher plate 6e is formed with two fitting holes (fitting portions) 6h and 6i that fit into the protrusions 6f and 6g. In this example, the fitting hole 6h is formed in a rectangular shape, and the fitting hole 6i is formed in a shape in which a part of the rectangular shape is cut.

  By thus forming the protrusions 6f and 6g and the fitting holes 6h and 6i in different shapes in the front and rear directions, the assembly direction of the pusher body 6d and the pusher plate 6e can be made constant. In this example, the left pusher plate 6e is attached to the pusher body 6d in a state where the left pusher plate 6e is rotated 180 ° with respect to the right pusher plate 6e (the front end and the rear end are switched). As a result, for example, variation in molding error generated during the punching and molding process of the pusher plate 6e can be made constant. In this example, the front and rear positions of the protrusions 6f and 6g are switched on the left and right sides of the pusher body 6d. However, the present invention is not limited to this, and the front and rear positions of the protrusions 6f and 6g are the same on the left and right sides of the pusher body 6d. May be. In this case, the left and right pusher plates 6e are attached to the pusher body 6d in the same direction. Also in this case, for example, variation in forming error generated in the punching and forming process of the pusher plate 6e can be made constant.

  The pusher body 6d includes a band insertion portion 6j at the top. The tip of a pusher band 6c (see FIG. 16B) that constitutes an example of the band portion is inserted and fixed to the band insertion portion 6j. The rear end of the pusher band 6c is attached to the staple cover 7 (see FIG. 1). The pusher 6 is pulled (pulled) in the direction opposite to the urging direction by the pusher band 6c in accordance with the rotation operation (opening operation) of the staple cover 7, and moves so as to retract toward the rear side of the magazine 3. Is done. The pusher body 6d includes an engagement groove 6k inside. A spring guide 6a as a guide shaft portion is engaged with the engagement groove 6k.

  The needle presser 40 has a function of pressing the staple 30 by pressing the staple 30 driven out from the staple punching port 12 of the magazine 3 against the inner wall of the front surface of the magazine 3. The needle presser 40 is formed in a curved (bent) plate shape by bending a metal plate substantially in half so as to have an acute angle, and retains elasticity by the curved plate shape. The needle presser 40 has an attachment portion 40c, and a hole portion 40a as a circular second hole portion is provided at the approximate center of the attachment portion 40c. Further, the rear end portion 40b of the attachment portion 40c is formed in a stepped shape so as to be inserted and fixed to the bottom surface of the main frame 3a of the magazine 3 via the insertion portion 50a of the staple guide 50.

  The needle presser 40 and the pusher 6 thus formed are attached to the magazine 3 to which the staple guide 50 is attached. First, the pusher plate 6e is attached to the pusher body 6d. For example, the fitting portion 6f of the pusher body 6d is fitted into the fitting hole 6h of the pusher plate 6e, and the fitting hole 6i is fitted into the protruding portion 6g, so that the pusher plate 6e is coupled to both sides of the pusher body 6d. Next, the rear end of the spring guide 6 a is engaged with the engagement groove 6 k of the pusher 6 from the front side of the pusher 6. After the engagement, the spring spring 6b (see FIG. 16A) is attached to the spring guide 6a. Thereby, the spring guide 6a is arranged between the upper side of the engagement groove 6k and the lower side of the band insertion portion 6j, and the spring guide 6a is loosely fitted to the pusher 6.

  After the pusher 6 is mounted in this manner, the main body frame 3a spans the rear end portion 40b of the needle presser 40 across the front mounting portion 3d of the magazine 3 with the tip of the needle presser 40 facing the front inner wall of the magazine 3. Is inserted into the opening 3n (see FIG. 11A) on the bottom surface of the needle, and the hole 40a of the needle presser 40 and the circular hole 3f as the first hole of the front mounting portion 3d are overlapped. Subsequently, the rear end portion of the spring guide 6a to which the pusher 6 is attached is inserted into the circular hole 3g of the rear attachment portion 3e of the magazine 3, and then the hole portion 40a of the needle presser 40 and the circular hole 3f of the front attachment portion 3d. Insert the tip of the spring guide 6a. At this time, the attachment portion 40c of the needle presser 40 is pressed against the front attachment portion 3d and fixed by a stopper 6m as a locking portion provided at the tip of the spring guide 6a. After inserting the distal end portion, the rear end portion of the spring guide 6a is retained by the main pin 21 (see FIG. 1). In this manner, the needle presser 40 and the pusher 6 are incorporated into the magazine 3. The left and right pusher plates 6e are installed in the gap between the side guide portion 50d of the staple guide 50 and the inner wall of the main frame 3a of the magazine 3. The pusher body 6d is installed between the left and right side guide portions 50d of the staple guide 50. When the pusher 6 is attached to the magazine 3, the side guide portion 50d of the guide main body 50j of the staple guide 50 is formed lower than the protrusions 6f and 6g that connect the pusher main body 6d and the left and right pusher plates 6e. .

  Next, the attachment method of the needle presser 40 and the configuration at the time of attachment will be described in detail. FIGS. 11A and 11B are explanatory views showing an attachment example (part 1) of the needle presser 40. FIG. FIG. 11A is composed of the magazine 3, the spring guide 6a, and the needle presser 40, and these components are viewed from above. In this example, the pusher 6 and the staple guide 50 shown in FIGS. 9 and 10 are not incorporated in the magazine 3 in FIG. 11A.

  The needle presser 40 shown in FIG. 11A is fixedly attached to the front mounting portion 3d of the magazine 3 by a spring guide 6a. In this example, the attachment portion 40c of the needle presser 40 has a rear end portion 40b (see FIG. 10) of the attachment portion 40c inserted into the opening 3n on the bottom surface of the magazine 3, and the attachment portion 40c is a spring guide 6a. The stopper 6m and the front mounting portion 3d are sandwiched. As a result, the needle presser 40 can be incorporated into the magazine 3 without requiring the addition of new attachment parts or a large design change. Note that the tip of the needle presser 40 is disposed so as to abut on the front inner wall of the magazine 3.

  11B is a cross-sectional view taken along arrow X1-X1 in FIG. 11A. In FIG. 11B, the staple 30 is illustrated by a two-dot chain line. The needle presser 40 shown in FIG. 11B has an elastic presser portion 40d on the distal end side. The needle presser 40 is installed so as to press the center portion of the crown portion 30a of the staple 30 in the process in which the staple 30 is lowered by the elastic presser portion 40d.

  12A and 12B are explanatory views showing an example (part 2) of attaching the needle presser 40. FIG. 12A is a cross-sectional view taken along arrow Y1-Y1 in FIG. 11A. FIG. 12B is an enlarged view of the inside of the broken line square of FIG. 12A. A rear end portion 40 b of the attachment portion 40 c of the needle presser 40 shown in FIG. 12B is inserted into the opening 3 n on the bottom surface of the magazine 3. Further, the attachment portion 40c of the needle presser 40 is sandwiched and fixed by the front attachment portion 3d of the magazine 3 and the stopper 6m of the spring guide 6a. The distal end portion of the elastic presser portion 40d of the needle presser 40 is disposed so as to contact the front inner wall of the magazine 3 and enter the opening 3p of the front inner wall.

  As described above, the stapler 100 according to the present invention includes the needle guide 40 that presses the staple 30 pushed out from the staple punching outlet 12 of the magazine 3 against the front inner wall of the magazine 3 and presses the staple 30, and includes the spring guide 6 a. Thus, the needle presser 40 is locked to the front mounting portion 3d of the magazine 3 and attached to the inside of the magazine 3.

  As a result, the needle presser 40 can be incorporated into the magazine 3 without requiring the addition of new attachment parts or a large design change. Accordingly, it is possible to simply provide the stapler 100 that is unlikely to cause the staple to buckle when the staple is driven.

  Next, the configuration when the staple guide 50 is attached will be described in detail. 13A and 13B are explanatory views showing an example (part 1) of attaching the staple guide 50. FIG. FIG. 13A is composed of the magazine 3 and the staple guide 50, and these components are viewed from above. In this example, the pusher 6, the spring guide 6 a, and the needle presser 40 shown in FIGS. 9 and 10 are not incorporated in the magazine 3 in FIG. 13A.

  The insertion portion 50a of the staple guide 50 is inserted and attached to the insertion opening 3m (see FIG. 11B) of the magazine 3 shown in FIG. 13A. Further, the spring receiving portion 50 c of the staple guide 50 is engaged with the opening 3 h of the magazine 3.

  13B is a cross-sectional view taken along arrow X2-X2 in FIG. 13A. In FIG. 13B, the staple 30 is illustrated by a two-dot chain line. The gap between the side guide portion 50d of the staple guide 50 shown in FIG. 13B and the inner wall of the magazine 3 is set to be approximately the same as the thickness L4 of the leg portion 30b of the staple 30 (see FIG. 5B). As a result, rattling of the leg portion 30b of the staple 30 can be suppressed, so that the guide accuracy of the staple guide 50 can be increased.

  Further, on both sides of the leading end of the staple guide 50, an inverted U-shaped elastic U-shaped portion 50e (see FIG. 14B) is provided oppositely. The elastic U-shaped portion 50e supports the leg portion 30b of the staple 30 that is driven out from the staple punching port 12 and descends. The distance L6 between each tip 50i of the elastic U-shaped portion 50e and the inner wall of the magazine 3 is set to be narrower than the thickness L4 of the leg 30b of the staple 30.

  The elastic U-shaped portion 50e is formed when the leg portion 30b of the staple 30 lowered passes between each tip portion 50i of the elastic U-shaped portion 50e and the inner wall of the magazine 3 (interval L6). Comes into contact with each tip 50i of the elastic U-shaped portion 50e. At this time, each distal end portion 50i of the elastic U-shaped portion 50e is bent inward by the leg portion 30b and presses the both leg portions 30b against the both side walls of the magazine 3 so that the leg portions 30b return to the original state after passing. Return. As a result, the leg 30b of the staple 30 can be brought into close contact with the inner wall of the magazine 3 and the leg 30b can be ejected perpendicularly to the sheet. Therefore, the stapler 100 can obtain a stable spelling.

  14A and 14B are cross-sectional views taken along arrow Y2-Y2 of FIG. 13A showing an example (part 2) of attaching the staple guide 50. FIG. A spring receiving portion 50c of the staple guide 50 shown in FIG. 14A is engaged with a spring receiving portion 3k of the magazine 3 by a spring 3i. As a result, the staple guide 50 is slidably biased in the direction of the staple punching opening 12 of the magazine 3.

  The elastic U-shaped portion 50e provided at the tip of the staple guide 50 has a front end surface 50f of the elastic U-shaped portion 50e in contact with the front inner wall of the magazine 3. Further, a receiving part 50g is provided on the upper part of the front end face 50f of the elastic U-shaped part 50e. The receiving portion 50g has an inclined portion 50h in which a front end surface 50f is partially cut off obliquely.

  When the staple 30 is lowered, the receiving portion 50g receives the crown portion 30a of the staple 30, and the crown portion 30a is slidably contacted with the inclined portion 50h of the receiving portion 50g. By the sliding contact of the crown portion 30a, the inclined portion 50h of the staple guide 50 is retracted and the staple guide 50 is also retracted. Thus, the staple guide 50 is incorporated in the magazine 3.

  Next, the configuration of the pusher 6 will be described. FIG. 15 is a perspective view illustrating a configuration example of the pusher 6. The pusher 6 shown in FIG. 15 is in a state where pusher plates 6e are attached to the left and right of the pusher body 6d. As described with reference to FIG. 10, the protrusions 6f and 6g having different shapes provided on the pusher main body 6d have different front and rear arrangements on the left and right sides of the pusher main body 6d. In this example, on the left side of the pusher main body 6d, a projection 6f is disposed in front, and a projection 6g is disposed behind. Further, on the right side of the pusher main body 6d, a projection 6g is disposed in front, and a projection 6f is disposed behind.

  In the left pusher plate 6e, the fitting hole 6h is fitted into the protrusion 6f of the pusher body 6d, and the fitting hole 6i is fitted into the protrusion 6g. The right pusher plate 6e also has fitting holes 6h and 6i fitted into the protrusions 6f and 6g, respectively. As a result, since the front and rear arrangements of the protrusions 6f and 6g are different, the pusher body 6d of the right pusher plate 6e is inverted 180 ° with the front end and the rear end of the plate reversed with respect to the left pusher plate 6e. Is attached. Thereby, for example, it is possible to absorb a molding error that occurs in the punching molding process of the pusher plate 6e.

  FIGS. 16A to 16C are explanatory views showing an example of attachment of the pusher 6. FIG. 16A includes the magazine 3, the pusher 6, the spring guide 6 a, the needle presser 40, and the staple guide 50, and these components are viewed from above.

  In the pusher 6 shown in FIG. 16A, an engagement groove 6k (see FIG. 16C) of the pusher 6 is engaged with a spring guide 6a and fixed slidably. In the pusher 6, the rear end portion of the pusher 6 is urged toward the staple punching opening 12 by a spring spring 6 b.

  FIG. 16B is a top view showing a configuration example of the pusher band 6 c attached to the pusher 6. As the pusher band 6c, a tongue-shaped member having a predetermined length and having a sword tip portion 61, a T-shaped portion 62, and a protruding portion 63 is used. The pusher band 6c is made of synthetic resin. For example, the pusher band 6c is inserted into the band insertion portion 6j of the pusher 6 shown in FIG. 15 in such a manner that the sword tip 61 is once bent, and after the insertion, the sword tip 61 returns to a flat shape to prevent it from coming off. The T-shaped portion 62 and the protruding portion 63 are attached to the opening of the staple cover 7 shown in FIG.

  16C is a cross-sectional view taken along arrow X3-X3 in FIG. 16A. A pusher plate 6e of the pusher 6 is installed in a gap L7 between the side guide portion 50d of the staple guide 50 and the inner wall of the magazine 3. The thickness of the pusher plate 6e is set to be approximately the same as the gap L7. The pusher plate 6e is fitted to the protrusions 6f and 6g of the pusher main body 6d shown in FIG. 10, and is fixed to the pusher main body 6d.

  As described above, according to the stapler 100 according to the present invention, the pusher main body 6d that is installed inside the staple guide 50 and that the sword tip portion 61 at the tip of the pusher band 6c is inserted and locked, and the pusher main body 6d. The pusher 6 includes left and right pusher plates 6e that are provided on both sides of the staple plate 30 and abut against the staple 30.

  Therefore, in the stapler 100 having the staple guide 50, one end of the pusher band 6c can be attached to the pusher main body 6d without adding an attachment part. As a result, the height of the pusher body 6d can be kept low, and the size of the pusher 6 can be made compact. Moreover, the pusher 6 can take the structure which has predetermined intensity | strength with the pusher plate 6e formed with the metal plate.

  Subsequently, another configuration of the pusher 6 will be described. 17A and 17B are side views showing a configuration example of the pusher 6 '. A pusher 6 'shown in FIG. 17A includes a pusher body 6d', protrusions 6f 'and 6g', and left and right pusher plates 6e '.

  The left and right pusher plates 6e 'are formed in the same shape and have fitting grooves 6h', 6i '. The groove of the fitting groove 6h 'is formed deeper than the groove of the fitting groove 6i'.

  The pusher body 6d 'has two protrusions 6f' and 6g 'for connecting the pusher plates 6e' on both sides. For example, these protrusions 6f 'and 6g' are formed in a cylindrical shape.

  The protrusions 6f 'and 6g' are set so that the front and rear attachment positions are different between the left side surface and the right side surface of the pusher body 6d '. In this example, on the left side surface of the pusher main body 6d ′ shown in FIG. 17A, the protrusion 6f ′ positioned in front of the pusher main body 6d ′ is provided at a lower position than the protrusion 6g ′ positioned rearward. Yes. Further, on the right side surface of the pusher main body 6d ′ shown in FIG. 17B, the protrusion 6f ′ positioned in front of the pusher main body 6d ′ is positioned higher than the protrusion 6g ′ positioned rearward, opposite to the left side surface. Is provided.

  Accordingly, the left pusher plate 6e ′ in FIG. 17B is attached to the pusher body 6d ′ in a state where the front end and the rear end of the plate are reversed 180 ° with respect to the right pusher plate 6e ′ in FIG. 17A. . As a result, for example, variation in molding error generated during the punching molding process of the pusher plate 6e 'can be made constant.

  Next, the configuration of the driver 5 will be described. 18A and 18B are explanatory diagrams illustrating a configuration example of the driver 5. The driver 5 shown in FIG. 18A is an overall perspective view, and includes an elastic portion 5c, a launch portion 5d, and a mounting portion 5e.

  The driver 5 is attached to the driver arm 4 shown in FIG. 1 by fitting the opening 5f of the mounting portion 5e of the driver 5 to a convex portion (not shown) provided in an annular shape by burring or the like. In the driver 5 attached in this way, the curved elastic portion 5c comes into contact with the staple cover 7 mounted on the magazine 3 shown in FIG. 1, and the interval between the driver 5 and the driver arm 4 and the magazine 3 is increased. Keeps constant during standby.

  A driver 5d is provided at the tip of the driver 5. The driving unit 5d of the driver 5 rotates the driver arm 4 shown in FIG. 1 to drive the leading staple 30 of the magazine 3 from the inside of the magazine 3 to the outside.

  At the tip of the projecting portion 5d, there are provided a protruding portion (on teeth) 5b and a flat portion 5i (see FIG. 18B). The protrusions 5b are provided on both sides of the ejecting portion 5d and abut on the upper portions of the leg portions 30b of the staple 30 supported by the staple guide 50 (see FIG. 13B). The flat portion 5 i is pushed out after coming into contact with the crown portion 30 a of the staple 30 after the projection portion 5 b comes into contact with the leg portion 30 b of the staple 30.

  FIG. 18B is an enlarged front view of the main part showing a configuration example of the launching part 5 d of the driver 5. Each of the protrusions 5b provided on both sides of the tip of the launching part 5d shown in FIG. 18B has an inclined part 5g and a contact part 5h. The abutting portion 5 h is provided at the tip of the protruding portion 5 b and abuts above the leg portion 30 b of the staple 30. The inclined portion 5g is formed with a predetermined inclination with respect to the flat portion 5i of the driver 5. The inclined portion 5g smoothly forms the crown portion 30a of the staple 30 into a slightly curved shape when the staple 30 is driven out. As a result, the drag from the sheet on each of the leg portions 30b of the staple 30 can be offset by the curved crown portion 30a.

  FIG. 19 is a perspective view showing an arrangement example of the driver 5 and the magazine 3. The driver 5 shown in FIG. 19 is disposed at the tip of the magazine 3. At this time, the ejection portion 5 d of the driver 5 is disposed above the staple ejection opening 12 of the magazine 3. That is, when the driver 5 is pushed down, the driver 5 is arranged so that the tip of the ejecting portion 5 d of the driver 5 approaches the front inner wall of the magazine 3.

  Next, operations of the driver 5, the needle presser 40, and the staple guide 50 will be described. 20A to 20D are front views showing an operation example (part 1) of the driver 5 and the staple guide 50. FIG. 20A to 20D are cross-sectional views of the magazine 3 to which the staple guide 50 is attached and the staples 30 are loaded as seen from the direction of arrows X2-X2 shown in FIG. 13A.

  The staples 30 loaded in the magazine 3 shown in FIG. 20A are arranged at a position where the staples 30 are pressed by the pusher 6 shown in FIG.

  No binding force is applied to the driver arm 4 shown in FIG. 1, and the driver 5 abuts the elastic portion 5c of the driver 5 against the staple cover 7 mounted on the magazine 3 shown in FIG. The distance between the driver 5 and the magazine 3 is kept constant. As a result, the driving unit 5d of the driver 5 waits at a predetermined interval above the leading staple 30 of the staple series 300 (see FIG. 4) (standby state).

  When a spelling force is applied to the driver arm 4, the driver 5 attached to the tip of the driver arm 4 starts to descend. For example, the driver 5 shown in FIG. 20B is in a state in which the contact portion 5 h of the projection portion 5 b of the driver 5 is in contact with the leg portion 30 b of the leading staple 30.

  Furthermore, when a spelling force is applied to the driver arm 4, the driver 5 starts ejecting the staple 30. For example, the driver 5 shown in FIG. 20C is in a state in which the leading staple 30 of the staple series 300 is ejected and separated, and the tips of the leg portions 30b of the staple 30 are inserted into the sheet bundle P. At this time, the protruding portion 5b of the ejecting portion 5d of the driver 5 presses the leg portion 30b of the leading staple 30 from substantially right above. Thereby, since the spelling force is transmitted to the leg part 30b in a substantially straight line via the protruding part 5b, the spelling force can be concentrated on the leg part 30b.

  When the staple 30 is lowered by pressing from the protrusion 5b, the space between each tip 50i of the elastic U-shaped portion 50e provided at the tip of the staple guide 50 and the inner wall of the magazine 3 (interval L6 shown in FIG. 13B). The leg 30b comes into contact with the respective tip portions 50i of the elastic U-shaped portion 50e when passing. At this time, each distal end portion 50i of the elastic U-shaped portion 50e is bent inward by the leg portion 30b and the leg portions 30b are pressed against both side walls of the magazine 3 so that the leg portion 30b is pressed against the sheet bundle P. Strike vertically. Thereby, since the leg part 30b is supported by the staple guide 50, buckling of the leg part 30b can be prevented.

  Further, the inclined portion 5g and the flat portion 5i of the protruding portion 5b smoothly form the crown portion 30a of the staple 30 in a slightly curved shape. As a result, the drag from the sheet bundle P applied to each of the leg portions 30b of the staple 30 can be offset by the curved crown portion 30a. As a result, the drag applied to the staple 30 can be suitably received, and the stapler 100 having high buckling property can be provided.

  Further, when a spelling force is applied to the driver arm 4, the driver 5 lowers the staple 30 that has been driven out. For example, the driver 5 shown in FIG. 20D is in a state where the staple 30 separated from the staple series 300 is lowered and the leading end of the leg portion 30b of the staple 30 penetrates the sheet bundle P. At this time, the protruding portion 5b of the ejecting portion 5d of the driver 5 continues to press the leg portion 30b of the leading staple 30.

  Further, each distal end portion 50i of the elastic U-shaped portion 50e is bent inward by the leg portion 30b, and the leg portions 30b are pressed against both side walls of the magazine 3 so that the leg portion 30b is pressed against the sheet bundle P. To be launched vertically.

  Further, the inclined portion 5g and the flat portion 5i of the protruding portion 5b smoothly form the crown portion 30a of the staple 30 in a slightly curved shape so that the drag from the sheet bundle P applied to each of the leg portions 30b of the staple 30 is provided. It cancels with the crown part 30a. In this way, the protrusions 5b of the ejecting portion 5d of the driver 5 and the tip portions 50i of the elastic U-shaped portion 50e of the staple guide 50 operate.

  As described above, according to the stapler 100 according to the present invention, the driver 5 provided at the tip of the driver arm 4 that drives out the staple 30 based on a predetermined binding force is used for the leg 30b of the staple 30 supported by the staple guide 50. The projection 5b is in contact with the upper side.

  Accordingly, since the spelling force is transmitted to the leg 30b via the protrusion 5b of the driver 5, the spelling force can be concentrated on the leg 30b. In addition, since the leg portion 30b is supported by the staple guide 50, buckling of the leg portion 30b can be prevented.

  Further, since the crown portion 30a of the staple 30 is curved by the protrusions 5b at both ends and the driver 5 main body, the drag force from the sheet bundle P on the leg portion 30b can be offset. Accordingly, it is possible to provide the stapler 100 having a high buckling property because the drag applied to the staple 30 can be suitably received.

  21A to 21D are side views showing an operation example (part 2) of the driver 5 and the staple guide 50. FIG. 21A to 21D are enlarged cross-sectional views of the main part of the magazine 3 to which the staple guide 50 is attached and loaded with the staple series 300 (the remaining number of staples is 6) as viewed from the direction of arrows Y2-Y2 shown in FIG. 13A. It is.

  The driver 5 arranged in the magazine 3 shown in FIG. 21A is in the standby state described above. In this state, the front end surface 50f of the elastic U-shaped portion 50e of the staple guide 50 is urged by a spring 3i (see FIG. 14A) and is in contact with the front inner wall of the magazine 3.

  When a spelling force is applied to the driver arm 4 from this standby state, the driver 5 attached to the tip of the driver arm 4 starts to descend. For example, the driver 5 shown in FIG. 21B is in a state in which the protruding portion 5b of the driver 5 comes into contact with the leg portion 30b of the leading staple 30 and starts firing the staple 30. In this state, the driver 5 shown in FIG. 21B is in a state where the leading staple 30 of the staple series 300 is ejected and separated, and the tips of the leg portions 30b of the staple 30 are inserted into the sheet bundle P. At this time, each distal end portion 50i (see FIG. 20C) of the elastic U-shaped portion 50e provided at the distal end of the staple guide 50 is bent inward by the leg portion 30b and the both leg portions 30b are connected to both side walls of the magazine 3. The leg 30b is driven out perpendicularly to the sheet bundle P.

  Further, when a binding force is applied to the driver arm 4, the driver 5 shown in FIG. 21C lowers the separated staple 30, and the leading end of the leg 30b of the staple 30 penetrates the sheet bundle P. At this time, the crown portion 30a of the leading staple 30 is in sliding contact with the inclined portion 50h (see FIG. 14B) of the elastic U-shaped portion 50e of the staple guide 50. By this sliding contact, as shown in FIG. 21C, the staple guide 50 biased toward the front side of the magazine 3 by the spring 3i (see FIG. 14A) is pushed back and slightly retracted. It should be noted that, when retracted slightly, the respective distal end portions 50i (see FIG. 20C) of the elastic U-shaped portion 50e of the staple guide 50 are bent inward by the leg portions 30b of the staple 30.

  Further, when a spelling force is applied to the driver arm 4, the driver 5 shown in FIG. As the staple 30 is lowered, the crown portion 30a of the staple 30 is in a state of being substantially in contact with the upper surface of the sheet bundle P. In the process of reaching this state, the staple guide 50 having the inclined portion 50h (see FIG. 14B) slidably contacted with the crown portion 30a is pushed back by the crown portion 30a, and the front-rear width L3 of the crown portion 30a (see FIG. 5A). ) At this time, the staple guide 50 supports the crown portion 30a of the staple 30 against the front inner wall of the magazine 3 by the front end surface 50f. Thereby, buckling of the crown part 30a can be prevented. When the staple guide 50 is retracted to the position shown in FIG. 21D, each tip 50i (see FIG. 20C) of the elastic U-shaped portion 50e of the staple guide 50 bent inward by the leg portion 30b of the staple 30. Return to the original state (see FIG. 20D).

  22A to 22D are side views showing examples of operations of the driver 5 and the needle presser 40. 22A to 22D show a part of the magazine 3 to which the needle presser 40 and the staple guide 50 are attached and loaded with the staple series 300 (the remaining number of staples is 6) as viewed from the direction of the arrows Y1-Y1 shown in FIG. 11A. It is sectional drawing of crushing.

  The driver 5 arranged in the magazine 3 shown in FIG. 22A is in the standby state described above. In this state, the needle presser 40 attached to the front mounting portion 3d of the magazine 3 is arranged so that the tip of the needle presser 40 abuts against the front inner wall of the magazine 3 and enters the opening 3p of the front inner wall. Has been. At this time, the needle presser 40 is not in contact with the leading staple 30.

  When a spelling force is applied to the driver arm 4 from this standby state, the driver 5 attached to the tip of the driver arm 4 starts to descend. For example, the driver 5 shown in FIG. 22B is in a state in which the leading staple 30 of the staple series 300 is ejected and separated, and the tips of the leg portions 30b of the staple 30 are inserted into the sheet bundle P. At this time, the elastic presser portion 40 d of the needle presser 40 is in contact with the crown portion 30 a of the staple 30.

  Furthermore, when a binding force is applied to the driver arm 4, the driver 5 shown in FIG. 22C lowers the separated staple 30. As the staple 30 is lowered, the staple 30 is in a state where the tip of the leg portion 30b penetrates the sheet bundle P. When the staple 30 is lowered, the elastic presser portion 40d of the needle presser 40 that is in contact with the crown portion 30a of the staple 30 uses the elastic force generated from the curved plate shape of the staple presser 40 to place the crown portion 30a on the front inner wall of the magazine 3. To support the crown portion 30a. At this time, in the needle presser 40, since the elastic presser portion 40d is bent, the interval between the elastic presser portion 40d and the mounting portion 40c is smaller than this interval shown in FIGS. 22A and 22B.

  Further, when a spelling force is applied to the driver arm 4, the driver 5 shown in FIG. As the staple 30 is lowered, the crown portion 30a of the staple 30 is in a state of being substantially in contact with the upper surface of the sheet bundle P. In the process of reaching this state, the elastic pressing portion 40d continues to support the crown portion 30a by pressing the crown portion 30a against the front inner wall of the magazine 3 using its own elastic force.

  In addition, the front-end | tip part of the elastic pressing part 40d is formed in the shape a little along the outer side. This is a period from the initial state where the staple 30 starts to descend (see FIG. 22B) to the state where the crown 30a is substantially in contact with the upper surface of the sheet bundle P (see FIG. 22D) after the descending is completed. This is because the crown portion 30a is pressed against the front inner wall of the magazine 3 to support the crown portion 30a for as long as possible. That is, as shown in FIG. 22B, in the initial state where the staple 30 starts to descend, the crown portion 30a is pressed against the front inner wall of the magazine 3 on the base end side of the elastic pressing portion 40d. Thereafter, after the leg portion 30b of the staple 30 penetrates the sheet bundle P, as shown in FIG. 22C, the crown portion 30a is formed at a portion formed in a shape slightly along the outer side of the distal end portion of the elastic pressing portion 40d. Press against the front inner wall of magazine 3.

  By combining with the staple guide 50, the pusher 6, the driver 5 having the protrusion 5b, and the needle presser 40, a high binding ability can be obtained while the height of the main body of the stapler 100 is kept low.

  Next, the clincher bumper 60 will be described in detail. FIG. 23 is a perspective view showing a mounting example of the clincher bumper 60. The clincher bumper 60 is provided at a position where the clincher arm 1 and the clincher guide portion 20 (see FIG. 1) contact each other and a position where the clincher arm 1 and the clincher 1h contact each other, and cushions the contact. . In this example, the clincher bumper 60 is attached to the tip of the clincher arm 1 with which the clincher guide portion 20 and the clincher 1h abut. The clincher guide unit 20 shown in FIG. 1 guides the clincher 1h as described above.

  The clincher bumper 60 is made of a rubber material or a resin foam material. This resin-based foam material is formed by foaming a resin, and there are a wide variety of cushioning materials depending on the type of resin, firing method, expansion ratio, and the like. Of course, not limited to these, the clincher bumper 60 may be formed using other materials having a buffer function similar to a rubber material or the like.

  FIG. 24 is an exploded perspective view showing the configuration and assembly example of the clincher bumper 60. The clincher bumper 60 shown in FIG. 24 includes a fitting portion 60a having a substantially “U” shape in cross section, a notch portion 60b having a “U” shape, and a clincher contact portion 60c.

  A spring 1i for biasing the clincher 1h is disposed in the notch 60b of the clincher bumper 60. Clincher contact portions 60c are provided on both sides of the notch 60b. Each of the bottom surface portions 1j of the clincher 1h is in contact with each of the clincher contact portions 60c.

  When the clincher bumper 60 is attached to the clincher arm 1, the tip of the clincher arm 1 is fitted to the fitting portion 60a. Thereafter, the clincher arm 1 to which the clincher bumper 60 is attached is attached to the clincher cover 2. At this time, the tip of the clincher bumper 60 abuts on the tip inner wall 2 a of the clincher cover 2. The tip of the clincher bumper 60 is prevented from coming off by the tip inner wall 2a. Further, the left and right ends of the clincher bumper 60 abut on the protrusions 2 b provided on both side walls of the clincher cover 2. The clincher bumper 60 is secured in the left-right direction by the protrusions 2b on both sides. The spring 1i is inserted into the bottom projection 2c of the clincher cover 2 and fixed.

  FIGS. 25A to 25C are explanatory views showing an example of attachment of the clincher bumper 60. FIG. FIG. 25A is a top view of the state where the clincher bumper 60 is attached to the clincher arm 1 as viewed from above. 25B is a cross-sectional view taken along arrow X4-X4 shown in FIG. 25A. The tip of the clincher arm 1 is inserted and attached to a fitting portion 60a having a substantially “U” cross section of the clincher bumper 60 shown in FIG. 25B. FIG. 25C is a front view seen from the direction of arrow Y4 shown in FIG. 25A. The clincher bumper 60 shown in FIG. 25C is formed to have a thickness about three times the thickness of the clincher arm 1.

  As described above, according to the stapler 100 according to the present invention, the clincher bumper 60 that cushions the impact is provided, the contact portion between the clincher guide portion 20 and the clincher arm 1 and the clincher 1h and the clincher arm 1 illustrated in FIG. The clincher bumper 60 is interposed and attached to the contact portion.

  Accordingly, the clincher guide portion 20 and the clincher arm 1 come into contact with each other through the clincher bumper 60, and the clincher 1h and the clincher arm 1 come into contact with each other through the clincher bumper 60. That is, as shown in FIG. 3B, the clincher 1h pushed down by the magazine 3 comes into contact with the clincher bumper 60 attached to the clincher arm 1 at the bottom 1j. Thereby, since the sound pressure at the time of binding the staple 30 can be reduced and the high frequency can be reduced, the sound can be made unharsh.

  Next, the handle bumper 64 will be described. FIG. 26 is a perspective view illustrating an example in which the handle bumper 64 is mounted. The handle bumper 64 shown in FIG. 26 constitutes an example of a second buffer member. The handle bumper 64 is provided at a position where the driver arm 4 (see FIG. 1) and the handle 8 come into contact with each other, and cushions the contact. In this example, the handle bumper 64 is attached to the tip of the handle 8 with which the driver arm 4 abuts.

  The handle bumper 64 is made of a rubber material or a resin foam material. Of course, the present invention is not limited thereto, and the handle bumper 64 may be formed using another material having a buffer function similar to that of a rubber material or the like.

  FIG. 27 is an exploded perspective view showing a configuration and an assembly example (1) of the handle bumper 64. The handle bumper 64 shown in FIG. 27 has two fitting protrusions (an example of a second fitting portion) 64a having a substantially “T” shape on the back side 64b. These fitting protrusions 64 a are fitted into the fitting holes 8 b of the handle 8. Thereafter, the handle 8 having the handle bumper 64 attached to the tip is attached to the handle cover 9. At this time, the tip of the handle bumper 64 is inserted into the tip groove 9 a of the handle cover 9. The front end groove 9a fixes the handle bumper 64 while preventing the front end from coming off and preventing the handle bumper 64 from dropping.

  FIG. 28 is an exploded perspective view showing the configuration and assembly example (2) of the handle bumper 64. Each of the substantially “T” -shaped fitting protrusions 64 a provided at the rear end portion of the rear side 64 b of the handle bumper 64 shown in FIG. 28 is fitted into each of the fitting holes 8 b of the handle 8. In this example, the substantially “T” -shaped fitting protrusion 64 a is formed in a protruding shape on the main body of the handle bumper 64. The fitting protrusion 64a is formed in a rod shape from the base to the tip, and the tip portion is formed in a flat plate shape. Further, a hooking claw portion 64c is provided at the front end portion of the back surface side 64b of the handle bumper 64.

  The fitting hole 8b for fitting the fitting projection 64a is opened in a convex shape. First, the flat tip of the fitting protrusion 64a is inserted into the wide region of the convex fitting hole 8b. Next, the handle bumper 64 into which the fitting protrusion 64a is inserted is slid in the direction of the arrow Q1, and the claw portion 64c of the handle bumper 64 is engaged with the engagement portion 8c of the handle 8. Thereby, the handle bumper 64 can be fixed to the handle 8.

  FIGS. 29A to 29C are explanatory views showing examples of attaching the handle bumper 64. FIG. FIG. 29A is a bottom view of the state in which the handle bumper 64 is attached to the handle 8 as seen from the bottom (in the direction of arrow Q2 shown in FIG. 28). 29B is a cross-sectional view taken along arrow X5-X5 shown in FIG. 29A. The tip end portion of the fitting protrusion 64 a of the handle bumper 64 shown in FIG. 29B is hooked and fixed to the upper surface of the handle 8. FIG. 29C is a front view seen from the direction of arrow Y5 shown in FIG. 29A. In the handle bumper 64 shown in FIG. 29C, the tip end portion of the fitting protrusion 64 a is hooked on the upper surface of the handle 8 and fixed.

  Thus, the handle 8 and the driver arm 4 come into contact with each other via the handle bumper 64. Thereby, since the sound pressure at the time of binding the staple 30 can be reduced and the high frequency can be reduced, the sound can be made unharsh.

  In the above-described embodiment, the handle bumper 64 and the clincher bumper 60 are fitted and attached. However, the present invention is not limited to this, and the handle bumper 64 and the clincher bumper 60 may be attached using an adhesive. Although the handle bumper 64 is attached to the handle 8, it may be attached to the tip of the driver arm 4. Further, although the clincher bumper 60 is attached to the clincher arm 1, it may be attached to the lower end of the clincher 1h.

  Next, the coil springs 10, 20c, and 20d having a function of suppressing the vibration of the spring provided in the stapler 100 will be described. FIGS. 30A and 30B are explanatory diagrams illustrating a configuration example of the coil springs 10, 20c, and 20d. FIG. 30A is a cross-sectional view illustrating a configuration of a main part of the stapler 100 and illustrating an installation example of the coil springs 10, 20c, and 20d.

  The coil spring 10 shown in FIG. 30A constitutes an example of a third urging member and an example of a loading portion urging member, and is installed between the rear side of the magazine 3 and the rear side of the clincher arm 1. As described with reference to FIG. 1, the coil spring 10 urges the magazine 3 upward to interpose a bundle of sheets between the clincher arm 1 and the magazine 3, and the clincher 1 h and the staple punching port 12. A predetermined gap is held between the two.

  The coil spring 20c constitutes an example of a first urging member, and is installed between the clincher guide 20a of the clincher guide portion 20 and the clincher arm 1, and urges the clincher guide 20a upward. The coil spring 20d constitutes an example of a second urging member, is installed between the rear end portion of the clincher guide 20a and the slide member 20b, and urges the slide member 20b forward.

  FIG. 30B is a perspective view illustrating a configuration example of the coil springs 10, 20c, and 20d. The coil spring 10 includes a spring body 10a and a vibration isolation member 70. In the spring body 10a, a wire is spirally formed so as to have elasticity. The vibration isolation member 70 is formed in a columnar shape, and is formed to have a diameter slightly larger than or equal to the inner diameter of the spring body 10a. Of course, the shape of the vibration isolating member 70 is not limited to a cylindrical shape, and may be any shape as long as it can be stored in the spring body 10a, such as a cube or a rectangular parallelepiped.

  The anti-vibration member 70 is installed inside the spring body 10a, and contacts the spring body 10a to suppress vibration of the spring body 10a. For the vibration isolating member 70, for example, a porous resin material such as a sponge is used. Of course, the present invention is not limited to this, and the vibration isolation member 70 may be formed using another material having a vibration isolation function similar to a sponge or the like. For example, a structure in which the spring body 10a is entirely or partially covered with a tubular member formed of a rubber material or the like can be considered.

  Similar to the coil spring 10, the coil spring 20 c includes a spring body 20 cc and a vibration isolation member 70. The anti-vibration member 70 is installed inside the spring main body 20cc, and comes into contact with the spring main body 20cc to suppress vibration.

  Similarly to the coil spring 10, the coil spring 20 d has a spring body 20 dd and a vibration isolation member 70. The anti-vibration member 70 is installed inside the spring body 20dd, and comes into contact with the spring body 20dd to suppress vibration.

  FIG. 31 is an exploded perspective view showing an assembly example of the coil spring 10. A cylindrical anti-vibration member 70 having a diameter slightly larger than the inner diameter of the spring body 10a shown in FIG. 31 is pushed into the spring body 10a from the direction of the arrow Q3. At this time, the width of the vibration-proof member 70 such as sponge is reduced and pushed into the spring body 10a. Thereby, the coil spring 10 in which the vibration isolating member 70 is in contact with the inside of the spring main body 10a can be configured. The coil springs 20c and 20d are also assembled in the same manner as the coil spring 10.

  Thus, according to the stapler 100 according to the present invention, the coil spring 20c that urges the clincher guide 20a upward, and the slide member 20b that is provided so as to be able to hold the clincher guide 20a in the upper position are urged forward. The coil spring 20d is provided, and the anti-vibration member 70 for suppressing vibration is provided on the coil spring 20c or 20d or the coil springs 20c and 20d.

  Therefore, the self-vibration when the coil springs 20c and 20d are repelled by the vibration isolation member 70 can be quickly damped. Thereby, the vibration sound of the coil spring resulting from the vibration of these coil springs can be reduced.

  Further, according to the stapler 100 according to the present invention, the coil spring 10 that biases the magazine 3 upward is provided, and the vibration isolating member 70 that suppresses vibration is provided on the coil spring 10.

  Therefore, the self-vibration when the coil spring 10 is repelled by the vibration isolation member 70 can be quickly damped. Thereby, the vibration sound of a coil spring resulting from this coil spring 10 vibrating can be reduced.

  Next, the back cover 15 attached to the back of the stapler 100 will be described. FIG. 32 is a perspective view showing a configuration example (No. 1) of the back cover 15. The back cover 15 shown in FIG. 32 constitutes an example of a covering member, and has a base end portion 15a and a flexible curved cover portion 15d (an example of a covering portion). The back cover 15 has a base end portion 15 a attached to the bottom surface of the magazine 3 shown in FIG. 1, and a handle portion 15 e of the curved cover portion 15 d connected to the base end portion 15 a straddling the magazine 3. 8 and the handle cover 9 are attached to cover the back of the stapler 100.

  The base end 15a includes a base end main body 15x, two protrusions 15b provided on the left and right of the base end main body 15x, and a claw-like hook provided at the rear center of the base end main body 15x. Part 15c. The two protrusions 15b are formed so as to protrude toward the left and right ends of the base end main body 15x.

  A rectangular parallelepiped first and second convex portions 15h and 15f are provided at the distal end and the center of the upper surface of the base end portion main body 15x. These convex portions 15 h and 15 f are fitted into concave portions (not shown) provided on the bottom surface of the magazine 3. Thereby, rattling of the base end part 15a attached to the magazine 3 can be prevented. A reinforcing rib 15g is provided at the rear end of the base end main body 15x.

  Further, a curved cover portion 15d is connected to the rear end of the base end portion 15a via a bending fulcrum portion PP. The curved cover portion 15d is made of, for example, a synthetic resin by a mold injection molding, and has a hard property that can be elastically deformed in the plate thickness direction.

  The curved cover portion 15d rotates with respect to the bending fulcrum portion PP. In this example, the folding fulcrum part PP is formed thinner than the thickness of the curved cover part 15d, and constitutes a self hinge. When the spelling force is transmitted to the curved cover portion 15d, the curved cover portion 15d rotates clockwise and counterclockwise with reference to the folding fulcrum portion PP.

  33A to 33C are explanatory diagrams illustrating a configuration example (No. 2) of the back cover 15. FIG. 33A is a side view of the back cover 15. The curved cover portion 15d of the back cover 15 shown in FIG. 33A rises substantially vertically from the bottom of the base end portion 15a, and is then bent into approximately 90 °, and further shaped into a curved shape that keeps the horizontal portion beyond that. Has been. The gap between the upper surface of the base end main body 15 x and the hooking portion 15 c is provided to be approximately the same as the thickness of the bottom surface of the magazine 3. The protrusion 15b is formed in an “L” shape and has elasticity.

  FIG. 33B is a front view of the back cover 15 (viewed from the direction of arrow Q4 in FIG. 33A). The tips of the “L” -shaped protrusions 15b provided on the left and right shown in FIG. 33B are formed to protrude outward. FIG. 33C is a top view of the back cover 15 (viewed from the direction of the arrow Q5 in FIG. 33B). As shown in FIG. 33B, the tip of the protrusion 15b is formed to protrude outward.

  34A and 34B are perspective views showing a mounting example (No. 1) of the back cover 15. FIG. 34A is a view of the back cover 15 attached to the rear end of the magazine 3 as seen from the upper oblique side. FIG. 34B is a view of the back cover 15 attached to the rear end of the magazine 3 as seen from the bottom oblique side. The magazine 3 is provided with a bowl-shaped attachment portion 3r extending from the bottom surface side of the magazine 3 and a fitting portion 3s (see FIG. 19) at a position (rear end) away from the attachment portion 3r by a predetermined distance. It has been.

  When the back cover 15 is attached to the magazine 3, the hook portion 15 c (see FIG. 32) of the back cover 15 is hooked and fixed to the fitting portion 3 s of the magazine 3, and the protruding portion 15 b of the back cover 15 is attached to the magazine 3. Engages with the mounting portion 3r. Thereby, the back cover 15 can be easily and firmly attached to the magazine 3 without affecting the inside of the magazine 3.

  In this example, the attachment portion 3r has a recess 3t (see FIG. 10) for preventing the removal. The concave portion 3t of the attachment portion 3r prevents the protruding portion 15b from coming out to the rear end side of the magazine 3.

  For this reason, in the process of assembling the stapler 100, when the back cover 15 is assembled to the magazine 3 to form an intermediate assembly, the back cover 15 can be prevented from easily falling off from the magazine 3, and the stapler 100 can be prevented. Assembling work becomes easier.

  FIGS. 35A and 35B are explanatory views showing a mounting example (No. 2) of the back cover 15. FIG. 35A is a view of the back cover 15 attached to the rear end of the magazine 3 as seen from the bottom surface side. 35B is a cross-sectional view taken along arrow X6-X6 in FIG. 35A. The hooking portion 15 c of the back cover 15 shown in FIG. 35B is hooked and fixed to the fitting portion 3 s of the magazine 3. Further, the convex portions 15 h and 15 f of the back cover 15 are fitted into concave portions (not shown) provided on the bottom surface of the magazine 3.

  36A and 36B are explanatory views showing a mounting example (No. 3) of the back cover 15. FIG. FIG. 36A is a view of the back cover 15 attached to the rear end of the magazine 3 as viewed from the side. 36B is an enlarged cross-sectional view taken along arrow X7-X7 in FIG. 36A. The tip of the protrusion 15b of the back cover 15 is hooked and fixed to the attachment 3r of the magazine 3 shown in FIG. 36B. Thus, the back cover 15 is attached to the magazine 3.

  Thus, according to the stapler 100 according to the present invention, the claw-like hooking portion 15c of the back cover 15 covering the back of the stapler 100 is hooked and fixed to the fitting portion 3s of the magazine 3, and the back cover is provided. Fifteen protrusions 15b are engaged with attachment portions 3r extending from the bottom surface side of the magazine 3.

  Therefore, the back cover 15 can be easily and firmly attached to the magazine 3 without affecting the inside of the magazine 3. Thereby, the inside of the magazine 3 can be used effectively. In particular, in the stapler 100 provided with the staple guide 50, the degree of freedom in designing the inside of the magazine 3 is limited. Therefore, the effect of the back cover 15 becomes remarkable.

  Subsequently, an operation example of the stapler 100 will be described with reference to FIG. In this operation example, the effects of the clincher bumper 60, the handle bumper 64, the vibration isolating member 70, and the back cover 15 will be described.

  37A and B are cross-sectional views showing an example of the operation of the stapler 100. FIG. The stapler 100 illustrated in FIG. 37A is in the above-described standby state (the same state as the stapler 100 illustrated in FIG. 1). The back cover 15 is attached to the bottom surface of the magazine 3, and the bottom surface of the back cover 15 is pressed and fixed by the coil spring 10.

  In this standby state, the curved cover portion 15d of the back cover 15 rises substantially perpendicular to the bottom portion of the base end portion 15a, and is then bent at approximately 90 °, and further bent so as to keep the horizontal portion. It is shaped into a shape. At this time, the distal end portion 15e of the curved cover portion 15d is located in the gap between the handle 8 and the handle cover 9, and the back of the stapler 100 is covered with the curved cover portion 15d.

  In the stapler 100 shown in FIG. 37B, a binding force is applied to the handle 8 through the handle cover 9 from this standby state, the handle 8 is rotated, and the staple 30 of the magazine 3 is driven by the driver 5, and the clincher guide. In this state, the clincher guide 20a of the unit 20 is lowered to bind the sheet bundle.

  In this binding state, the distal end portion 15 e of the curved cover portion 15 d of the back cover 15 is slightly retracted from the standby state with the rotation of the handle 8 and is positioned in the gap between the handle 8 and the handle cover 9. The back of the stapler 100 is covered with the curved cover portion 15d.

  At this time, for example, if the distal end portion 15e of the curved cover portion 15d is designed to extend between the handle 8 and the driver arm 4, the curved cover portion 15d is crushed by the handle 8 to be deformed and spelled. There is a problem of wasting power. In this example, since the distal end portion 15e of the curved cover portion 15d extends between the handle 8 and the handle cover 9, the curved cover portion 15d can avoid interference from the handle 8. Waste can be saved.

  Further, as a silencing effect, the handle 8 and the staple cover 7 are brought into contact with each other via the handle bumper 64 attached to the tip of the handle 8, so that the sound pressure when the staple 30 is bound can be reduced.

  Further, the clincher arm 1 and the clincher guide 20a come into contact with each other through the clincher bumper 60 attached to the tip of the clincher arm 1, and the clincher arm 1 and the clincher 1h come into contact with each other. Can be reduced and the high frequency can be reduced. Thereby, it can be set as the sound which is not harsh.

  The coil spring 10 that biases the magazine 3 upward, the coil spring 20c that biases the clincher guide 20a upward, and the coil spring 20d that biases the slide member 20b forward are provided with vibration-proof members 70 such as sponges. Therefore, the vibration generated in these coil springs can be quickly attenuated, and the vibration noise of the coil springs can be reduced.

  The present invention is applied to a stapler in which a staple leg composed of a crown part and leg parts provided at both ends of the crown part is passed through a sheet based on a predetermined binding force, and the leg part is bent to bind the sheet. It is preferable.

1 Clincher arm (binding arm)
1h clincher (needle part)
2 Clincher cover (binding cover)
3 Magazine (loading section)
3h Rectangular hole (first opening)
4 Driver arm (drive arm)
5 Driver (Driver)
5a Operation lever (operation arm)
5b Protruding part 6 Pusher (pressing part)
6a Spring guide (guide shaft)
6b Spring spring (biasing member)
6c Pusher band (band part)
7 Staple cover (loading cover)
8 Handle (operation part)
9 Handle cover (operation cover)
10 Coil Spring 12 Staple Punching Port 15 Back Cover (Coating Member)
15a Base end portion 15b Projection portion 15c Hook portion 15d Curved cover portion 15e Tip portion 20 Clincher guide portion (binding guide portion)
20a Clincher guide (binding guide body)
20b Slide member (sliding member)
20c, 20d Coil spring 30 Staple 30a Crown part 30b Leg part 40 Needle presser 50 Staple guide (staple guide part)
60 clincher bumper (buffer member)
60a Fitting part (first fitting part)
60c Clincher contact part 64 Handle bumper 70 Anti-vibration member 100 Stapler

Claims (4)

A loading unit having a staple punching outlet for staple driving at one end and loaded with staples;
A driving arm portion that has a driving portion that contacts a staple located at the staple punching hole at one end, and drives the staple based on a spelling force;
A binding arm portion that has a movable needle bending portion that bends the staple at one end, and binds the staple by bending the staple launched from the staple punching port by the driving portion at the needle bending portion;
A binding guide portion provided on the binding arm portion so as to be able to guide the needle bending portion, and pushed down in response to an operation of the driving arm portion;
A first spring provided between a lower portion of the binding guide portion and an upper portion of the binding arm portion and biasing the binding guide portion upward;
A second spring provided between an upper portion of the binding arm portion provided with the first spring and a lower portion of the needle bending portion and biasing the needle bending portion upward;
A cushioning member provided at a contact portion where at least the needle bending portion and the binding arm portion contact each other, and buffering the needle bending portion biased upward by the second spring;
A stapler having a predetermined gap in the contact portion. The buffer member is
Provided in the binding arm, the gap is
The stapler according to claim 1, wherein the stapler is provided between a surface of the buffer member that is in contact with the needle bending portion and a surface of the needle bending portion that is in contact with the buffer member. The needle bending portion is
The stapler according to claim 1, wherein the stapler is provided so as to be movable, and the buffer member is provided on at least one of the needle bending portion and the binding arm portion. The needle curved portion and the binding guide portion are:
The needle bending portion is pushed down by the staple driven out by the driving portion, and then both the needle bending portion and the binding guide portion are pushed down in response to the operation of the driving arm portion. The stapler according to claim 1.

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