JP2013064458A - Staple and stapler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a staple by which about two to eighty pieces of paper can be bound with light operation force.SOLUTION: The staple 10 includes: a needle crown 10a; and two needle feet 10b which is configured to bend in one direction from the both ends of the needle crown 10a, wherein an outside width dimension L4 of the needle crown 10a is 11.35 mm or more and 11.49 mm or less, a needle wire width L2 is more than 0.50 mm and less than 0.70 mm, a needle wire thickness L3 is more than 0.32 mm and less than 0.49 mm, and a length of the needle feet L1 is 10.0 mm that is less than or equal to the outside width dimension L4 of the needle crown.

Description

  The present invention relates to a staple capable of binding about 2 to 80 sheets and a stapler in which the staple is used.

  There are various types of staplers for binding sheets using staples depending on the number of sheets to be bound. Further, various types of staples used in the stapler are provided depending on the number of sheets to be bound.

  In general, when the number of sheets to be bound is small, staples with a small wire diameter are used, and when the number of sheets to be bound is large, staples with a large wire diameter are used. When the number of sheets to be bound is small, staples with short needle legs are used, and when the number of sheets to be bound is large, staples with long needle legs are used.

  Conventionally, there are many configurations in which one type of staple can be loaded in a small stapler having about 20 sheets. On the other hand, while binding a large number of sheets, many large staplers can be loaded with staples having different needle foot lengths.

  Regarding the staple for binding about 80 sheets of paper, the required requirement is that the thickness of the 80 sheets is about 7.2 mm first, so that 80 sheets can be penetrated and clinched. Needle foot length of about 10 mm is required.

  Conventionally, a staple referred to as No. 3 defined in Japanese Industrial Standard has been used as a staple for binding about 80 sheets. In the staple referred to as No. 3, staples having a needle crown outer width (outer dimension) of 12.93 mm, a needle line width of 0.70 mm, and a needle line thickness of 0.49 mm have been commercialized.

  However, in order to reduce the penetrating load so that the paper can be bound with a light force, the conventional needle line width and needle line thickness staple referred to as No. 3 has a large penetrating load. Also, when binding a small number of sheets, the appearance is poor because the needle line width and needle line thickness are large.

  On the other hand, as a staple for binding about 20 sheets, a staple called No. 10 defined in Japanese Industrial Standard has been used. In staple No. 10, staples having a crown outer dimension of 9.48 mm, a needle line width of 0.50 mm, and a needle line thickness of 0.32 mm have been commercialized.

  However, it has the staple line width and the needle line thickness of No. 10 staple, the outer diameter of the staple crown of No. 3 staple, and the length of the needle foot of about 10 mm for binding about 80 sheets of paper. With the staples that are provided, the buckling resistance is reduced, and when the number of sheets to be bound increases, buckling occurs at the needle crown.

  When the outer dimension of the needle crown is narrowed, the buckling generated in the needle crown tends to be improved. However, in order to be able to bind about 80 sheets of paper, if the length of the needle foot is set to about 10 mm, the outer dimension of the needle crown is 9.48 mm to match the staple called No. 10. The length of the needle foot is longer than the outer dimension of the needle crown. For this reason, when two sheets which are the minimum number of sheets to be bound are bound, the tip of the needle foot protrudes outward in the width direction from the needle crown on the front side of the sheet, and the appearance is poor.

  On the other hand, as a staple having an outer dimension of the needle crown of 10.0 mm or more, a staple having the same needle line width and needle line thickness as a staple called No. 10 and having an outer dimension of the needle crown of 11.42 mm has been commercialized. (For example, refer to Patent Document 1).

JP 2009-63054 A

  However, if the staple line and the needle line width and needle line thickness are the same as those of No. 10, even if the outer width of the needle crown is 11.42 mm, the length of the needle foot is about 10.0 mm and about 80 sheets of paper are used. When trying to bind, the buckling strength is insufficient.

  For this reason, conventionally, it is necessary to use different staples when binding a small number of sheets and binding a large number of sheets, and it is necessary to prepare a stapler corresponding to each staple.

  In addition, when binding a large number of sheets, it is necessary to use staples having a large needle line width and needle line thickness as referred to as No. 3, which has a large paper penetrating load and a large operating force for operating the stapler. And a large stapler was required.

  The present invention has been made to solve the above-described problems, and provides a staple capable of binding about 2 to 80 sheets of paper with a light operating force, and a stapler in which the staple is used. Objective.

  In order to solve the above-described problems, the present invention includes a needle crown and two needle legs that are bent in one direction from both ends of the needle crown, and the outer width dimension of the needle crown is 11. 35 mm or more and 11.49 mm or less, the needle line width is larger than 0.50 mm and smaller than 0.70 mm, the needle line thickness is larger than 0.32 mm and smaller than 0.49 mm, The staple is configured to have a length equal to or shorter than the outer width dimension of the needle crown.

  The present invention also provides a magazine unit having a magazine loaded with staples that are folded in one direction from both ends of the needle crown and the needle crown, and in which staples comprising two needle legs are loaded, and the staples stored in the magazine. A driver unit having a driver for driving and a clincher unit for bending the staple foot of the staple which is driven by the driver unit and penetrates the paper, and the staple loaded in the magazine has an outer width of the needle crown of 11.35 mm or more. 11. Needle length is configured to be less than 11.49 mm, needle line width is greater than 0.50 mm, less than 0.70 mm, needle line thickness is greater than 0.32 mm, less than 0.49 mm, and the length of the needle foot Is a stapler configured to have a length equal to or less than the outer width of the needle crown.

  In the present invention, since the needle line width and needle line thickness are thinner than the staple referred to as No. 3, the penetrating load is reduced even in the operation of binding about 80 sheets. Accordingly, it is possible to bind the paper with a light operation force by using a small stapler as compared with the conventional large stapler.

  Further, in the present invention, the needle line width and needle line thickness are thicker than the staple called No. 10, and the outer dimension of the needle crown is shorter than that of the staple called No. 3, so about 80 sheets. Even in the operation of binding the paper, the buckling strength can be improved.

  Furthermore, in the present invention, the outer dimension of the needle crown is configured to be longer than 10.0 mm, which is the length of the needle foot necessary for binding about 80 sheets of paper, so that the minimum number of sheets to be bound is two. Even when this paper is bound, the tip of the needle foot does not protrude outward in the width direction from the needle crown on the front side of the paper. Further, since the needle line width and needle line thickness are thinner than those of the staple called No. 3, the appearance can be improved.

  Therefore, in the present invention, it is possible to bind 2 to 80 sheets, which is the minimum number of sheets, without deteriorating the appearance when binding the sheets, with a light operating force, and without needle replacement. it can.

It is explanatory drawing which shows an example of the staple of this Embodiment. It is explanatory drawing which shows the stapler in the state which bound the paper. It is a graph which shows the relationship between the number of sheets of paper, and a penetration load. It is a sectional side view which shows the detail of the internal structure of the stapler of this Embodiment. It is a sectional side view which shows the internal structure of the stapler of this Embodiment. It is a side view of the stapler of this Embodiment in the state where the cover was removed. It is a sectional side view which shows the internal structure of the stapler of this Embodiment in the state which removed the cover. It is a perspective view which shows the internal structure of the stapler of this Embodiment. It is a perspective view which shows the internal structure of the stapler of this Embodiment. It is a partially broken perspective view which shows the internal structure of the stapler of this Embodiment. It is a side view which shows the external appearance of the stapler of this Embodiment. It is a perspective view which shows the external appearance of the stapler of this Embodiment. It is a perspective view which shows the external appearance of the stapler of this Embodiment. It is a disassembled perspective view which shows an example of the lower handle unit of this Embodiment. It is a disassembled perspective view which shows an example of the clincher unit of this Embodiment. It is a disassembled perspective view which shows an example of the upper handle unit of this Embodiment. It is a front view which shows an example of a clincher unit. It is a principal part top view which shows an example of a clincher unit. It is a principal part side view which shows an example of a clincher unit. It is an external appearance perspective view which shows an example of a clincher unit. It is a principal part perspective view which shows the structure which hold | maintains a clincher unit in a standby position. It is a principal part side view which shows the structure which hold | maintains a clincher unit in a standby position. It is a block diagram which shows an example of the partition plate holding a clincher. It is principal part side sectional drawing which shows an example of a magazine. It is principal part side sectional drawing which shows an example of a magazine. It is a principal part perspective view which shows an example of a staple guide. It is a perspective view which shows an example of a staple holder. It is front sectional drawing which shows the example of attachment of a staple holder. It is a sectional side view which shows the example of attachment of a staple holder. It is a sectional side view which shows an example of a locking mechanism. It is principal part plane sectional drawing which shows an example of a locking mechanism. It is a perspective view which shows an example of a front cover. FIG. 10 is a side cross-sectional view illustrating an operation of binding sheets with the stapler according to the present exemplary embodiment. It is a perspective view which shows the operation | movement which binds a paper with the stapler of this Embodiment. FIG. 10 is an operation explanatory diagram illustrating an example of a staple driving operation in the stapler according to the present embodiment. It is a principal part side view which shows an example of operation | movement of a slider. FIG. 10 is a side cross-sectional view illustrating an operation of binding sheets with a stapler according to a modified example. It is operation | movement explanatory drawing which shows an example of operation | movement of a clincher unit. It is operation | movement explanatory drawing which shows an example of operation | movement of a clincher unit. It is operation | movement explanatory drawing which shows an example of operation | movement of a clincher unit. It is a disassembled perspective view which shows the modification of a clincher unit. It is operation | movement explanatory drawing which shows an example of operation | movement of the clincher unit of a modification.

  Embodiments of staples and staplers according to the present invention will be described below with reference to the drawings.

<Configuration example of staple according to the present embodiment>
FIG. 1 is an explanatory view showing an example of a staple according to the present embodiment. FIG. 1 (a) is a front view of the staple according to the present embodiment, and FIG. 1 (b) is a side view of the staple according to the present embodiment. FIG.

  The staple 10 according to the present embodiment is loaded on a small stapler as compared with the conventional medium-sized stapler. From the minimum binding number of 2 sheets, the maximum binding number of sheets of about 80 sheets is light. It is designed to be bound by operating force and without needle replacement.

  As shown in FIG. 1 (a), the staple 10 includes a needle crown 10a and two needle legs 10b configured to be bent so as to be substantially parallel to one direction from both ends of the needle crown 10a. A plurality of staples 10 are bonded together to form a staple bundle.

  The 80 sheets have a thickness of about 7.2 mm if the standard sheet has a thickness of 0.09 mm. For this reason, in order to allow about 80 sheets of paper to penetrate and clinch, the length of the needle foot needs to be about 10.0 mm.

  Now, as an industrial product staple, if it tries to manufacture using the wire rod of the new dimension different from the wire rod currently employ | adopted with the existing staple, cost will become high. For this reason, it is also necessary to consider the use of the wire used in the existing staples.

  In the staple called No. 3 defined in Japanese Industrial Standard, the outer width dimension (outer dimension) of the needle crown is 12.93 mm, the needle line width is 0.70 mm, the needle line thickness is 0.49 mm, and the length of the needle foot Staples with a thickness of 6.0 mm have been commercialized.

  On the other hand, in the staple called No. 10 defined in the Japanese Industrial Standard, the outer dimension of the crown was 9.48 mm, the needle line width was 0.50 mm, the needle line thickness was 0.32 mm, and the needle foot was 5.0 mm. Staples have been commercialized.

  In stapling, if the length of the needle foot is less than half of the outer dimension of the needle crown, the two needle feet do not overlap in a state where the two sheets, which are the minimum number of sheets, are bound. However, since the number of sheets to be bound is defined by the length of staple needles, the number of sheets to be bound cannot be increased.

  Therefore, in order to increase the number of sheets to be bound with such a staple called No. 3, a staple called No. 3 U having a needle foot length of 10 mm has been commercialized.

  In staples in which the length of the needle foot is more than half of the outer dimension of the needle crown, the number of staples can be reduced by shifting the two needle feet in the front-rear direction perpendicular to the needle crown. When two sheets are bound, the two needle feet do not overlap.

  In addition, if the length of the needle foot is configured to be approximately equal to or less than the outer dimension of the needle crown, the tip of the needle foot is positioned on the surface of the paper when two sheets, which are the minimum number of sheets, are bound. It does not protrude outward in the width direction from the side needle crown, and the appearance is improved.

  However, the staples referred to as No. 3 and No. 3 U have a larger needle line width and needle line thickness than the staple referred to as No. 10. For this reason, the penetration load required to penetrate the paper increases.

  Therefore, in the stapler in which the staple referred to as No. 3 is used, particularly in the stapler in which the staple referred to as No. 3 U is used, it is necessary to lengthen the handle in order to reduce the operation force for pushing the handle. It is difficult to reduce the size of the stapler. A stapler that employs a mechanism called a booster mechanism that utilizes the lever principle has been commercialized. However, even if the booster mechanism is employed, it is difficult to reduce the size of the stapler.

  Compared with the staples referred to as No. 3 and No. 3 U, the staple line width and needle line thickness of the staple referred to as No. 10 are set to be thin, and the penetration load is reduced. However, since the staple line width and the needle line thickness of the staple are thin, the strength is reduced as compared with the staples referred to as No. 3 and No. 3 U.

  For this reason, a staple having the same outer dimension of the needle crown and the length of the needle foot as that of the staple referred to as No. 3 U, and the same needle line width and needle line thickness as those of the staple referred to as No. 10 When trying to bind about a sheet of paper, the buckling strength decreases due to the long outer dimension of the needle crown, and the needle crown that receives the pressing force buckles.

  When the outer dimension of the needle crown is narrowed, the buckling strength generated in the needle crown tends to be improved. However, in order to be able to bind about 80 sheets of paper, if the needle foot length is set to 10.0 mm, the minimum number of sheets to be bound is 2 if the outer dimension of the needle crown is 10.0 mm or less. When the sheet is bound, the tip of the needle foot protrudes outward in the width direction from the needle crown on the front side of the sheet, and the appearance is poor.

  On the other hand, staples having an outer dimension of the needle crown of 12.26 mm, a needle line width of 0.51 mm, a needle line thickness of 0.37 mm, and a needle foot length of 6.0 mm have been commercialized.

  However, a staple with an outer dimension of the needle crown of 12.26 mm, a needle line width of 0.51 mm, and a needle line thickness of 0.37 mm, and a needle foot length of 10.0 mm, is intended to bind about 80 sheets. As a result, the buckling strength is reduced due to the long outer dimension of the needle crown, and the needle crown that receives the pressing force buckles.

  Furthermore, as a staple having an outer dimension of the needle crown of 10.0 mm or more, a staple having the same needle line width and needle line thickness as that of the staple No. 10 and having an outer dimension of the needle crown of 11.42 mm has been commercialized. Yes.

  However, for the staple No. 10 and the needle line width and needle line thickness, even if the outer dimension of the needle crown is 11.42 mm, the length of the needle foot is 10.0 mm, and about 80 sheets will be bound. Then, the buckling strength is reduced due to the narrow needle line width and needle line thickness and the long outer dimension of the needle crown, and the needle crown that receives the pressing force buckles.

  Therefore, in the staple 10 of the present embodiment, as shown in FIGS. 1A and 1B, the length L1 of the needle foot 10b is 10.0 mm, the needle line width L2 is 0.51 mm, and the needle line thickness L3. Was 0.37 mm, and the outer dimension L4 of the needle crown 10a was 11.42 mm.

  Specifically, the length L1 of the needle foot 10b is 10.0 mm as a reference dimension and 10 ± 0.5 mm in consideration of tolerances. The outer dimension L4 of the needle crown 10a was 11.42 mm as a reference dimension, and was 11.42 ± 0.07 mm in consideration of tolerances. In addition, the needle line width L2 was set to 0.51 mm with a reference dimension of 0.51 ± 0.03 mm in consideration of tolerances. The needle wire thickness L3 is 0.37 mm with a reference dimension of 0.37 ± 0.05 mm in consideration of tolerances. The inner width dimension (inner dimension) L5 of the needle crown 10a was 10.45 mm as a reference dimension, and was 10.45 ± 0.50 mm in consideration of tolerances.

  FIG. 2 is an explanatory diagram illustrating staples in a state where sheets are bound. In the staple 10, the length L1 of the needle foot 10b is slightly shorter than the outer dimension L4 of the needle crown 10a, and is configured to be substantially equivalent. In the stapler 1A described later, the two needle feet 10b are shifted and bent in the front-rear direction orthogonal to the needle crown 10a.

  As a result, as shown in FIGS. 2A and 2B, when two sheets P, which is the minimum number of sheets, are bound, the two needle feet 10b do not overlap, and the needles The tip of the foot 10b is configured not to protrude outward in the width direction from the needle crown 10a on the front side of the paper P.

  In the staple 10 according to the present embodiment configured with the dimensions shown in FIGS. 1A and 1B, when the sheet P is bound with about 2 to 80 sheets, which is the minimum number of sheets to be bound. It can be bound without changing the needle without deteriorating the appearance.

  Further, in the staple 10 of the present embodiment, the needle line width and the needle line thickness are thinner than those of the staples referred to as No. 3 and No. 3 U, so that the penetration load is reduced even in the operation of binding about 80 sheets of paper. Is done. Accordingly, it is possible to bind the paper with a light operation force by using a small stapler as compared with the conventional large stapler.

  Further, in the staple 10 of the present embodiment, the needle line width and needle line thickness are thicker than that of the staple referred to as No. 10, and the outer dimension of the needle crown 10a is compared with that of the staple referred to as No. 3. Since it is short, buckling of the needle crown 10a can be prevented even in the operation of binding about 80 sheets.

  Here, in the staple 10 of the present embodiment, the staple line width and the needle line thickness are the same as the staple referred to as No. 10, and the staple crown has an outer dimension of 11.42 mm, and the outer dimension of the needle crown 10a is the same. Although it is the same, the buckling strength can be improved and buckling can be prevented because the needle wire width and needle wire thickness are thicker than the staple called No. 10. As will be described later, it is possible to provide staple compatibility.

  In addition, the staple 10 according to the present embodiment can be manufactured by using a wire material that is used in an existing staple.

  The staples of the example and the comparative example were produced with the needle line width and needle line thickness shown in the following table, and the measurement of the through load was compared with the occurrence of buckling. Here, the staple of Example 1 in which the needle line width is 0.51 mm and the needle line thickness is 0.37 mm, and the staple of Comparative Example 1 in which the needle line width and the needle line thickness are the same as those of the staple No. 10 are the needles. The outer dimension of the crown was 11.40 mm. In the staple of Comparative Example 2 in which the needle line width and needle line thickness were the same as the staple called No. 3 (No. 3 U), the outer dimension of the needle crown was 12.78 mm.

  FIG. 3 is a graph showing the relationship between the number of sheets and the through load. As shown in the graph of FIG. 3, the staple of Comparative Example 1 in which the needle line width and the needle line thickness are the same as those of the staple referred to as No. 10 has a needle line width and a needle line thickness compared to the staple referred to as No. 3. Since it is thin, the through load is reduced. However, since the needle line width and needle line thickness were thin, the strength was lower than that of the staple called No. 3, and buckling occurred in the needle crown.

  In the staple of Comparative Example 2 in which the needle line width and the needle line thickness are the same as the staple referred to as No. 3, the occurrence of buckling at the needle crown is suppressed, but the needle line width compared to the staple referred to as No. 10 is suppressed. In addition, since the needle wire thickness is thick, the penetrating load increases.

  On the other hand, in the staple of Example 1 in which the needle line width is 0.51 mm and the needle line thickness is 0.37 mm, since the needle line width and the needle line thickness are thinner than the staple referred to as No. 3, 80 sheets. It was found that the penetration load was reduced even in the operation of binding about a sheet of paper, and the penetration load was reduced by about 25% compared to the staple called No. 3.

  Further, in the staple of Example 1, the needle line width and needle line thickness are thick compared to the staple referred to as No. 10, and the outer dimension of the needle crown is short compared to the staple referred to as No. 3, It has been found that the occurrence of buckling at the needle crown can be suppressed.

<Overall configuration example of the stapler according to the present embodiment>
4 is a side sectional view showing details of the internal configuration of the stapler according to the present embodiment, FIG. 5 is a side sectional view showing the internal configuration of the stapler according to the present embodiment, and FIG. 6 is a state where the cover is removed. FIG. 7 is a side sectional view showing the internal configuration of the stapler of the present embodiment with the cover removed.

  8 and 9 are perspective views showing the internal configuration of the stapler of the present embodiment, and FIG. 10 is a partially broken perspective view showing the internal configuration of the stapler of the present embodiment. Further, FIG. 11 is a side view showing the appearance of the stapler according to the present embodiment, and FIGS. 12 and 13 are perspective views showing the appearance of the stapler according to the present embodiment.

  The stapler 1A of the present embodiment uses the staple 10 described with reference to FIG. 1 and can bind about 80 sheets of paper with a light operating force as a small configuration compared to a conventional medium-sized stapler. It is what I did. In addition, the appearance can be improved even when a small number of sheets, such as two sheets, which are the initial number of sheets to be bound, are bound.

  The stapler 1A includes a lower handle unit 11a and an upper handle unit 11b. In this example, the stapler 1A is used in a form in which the lower handle unit 11a is placed at a work place such as a desk and the upper handle unit 11b is pushed.

  FIG. 14 is an exploded perspective view showing an example of the lower handle unit of the present embodiment, and FIG. 15 is an exploded perspective view showing an example of the clincher unit of the present embodiment. The lower handle unit 11a includes a clincher unit 2A that bends the needle foot 10b of the staple 10 that has penetrated the paper, and a slider 3 that locks and unlocks the clincher unit 2A at the standby position. Further, the lower handle unit 11a includes a lower handle frame 4 to which the clincher unit 2A and the slider 3 are attached.

  FIG. 16 is an exploded perspective view showing an example of the upper handle unit of the present embodiment. The upper handle unit 11b includes a magazine unit 5 in which the staples 10 are stored, and a driver unit 6 that drives out the staples 10 stored in the magazine unit 5. The upper handle unit 11 b includes a handle unit 7 that applies force to the driver unit 6 to drive the staples 10 stored in the magazine unit 5.

<Configuration example of clincher unit>
FIG. 17 is a front view showing an example of the clincher unit, FIG. 18 is a plan view of the main part showing an example of the clincher unit, FIG. 19 is a side view of the main part showing an example of the clincher unit, and FIG. It is an external appearance perspective view which shows an example.

  FIG. 21 is a perspective view of the main part showing a configuration for holding the clincher unit at the standby position, and FIG. 22 is a side view of the main part showing a configuration for holding the clincher unit at the standby position. Furthermore, FIG. 23 is a block diagram showing an example of a partition plate that holds the clincher.

  Next, the configuration of the clincher unit 2A will be described with reference to the drawings. The clincher unit 2A includes a pair of clincher 20L and 20R that bends the needle foot 10b of the staple 10 that has penetrated the paper, and a clincher holder 21 that supports the clincher 20L and the clincher 20R.

  The clincher unit 2A is configured to bend the needle foot 10b of the staple 10 by rotating the clincher 20L and the clincher 20R, and moves the clincher 20L and the clincher 20R closer to each other as a movement to start bending the needle foot 10b. A force to bend the needle foot 10b inward is applied.

  For this reason, the clincher unit 2A guides the movement of the clincher holder 21 in the up-and-down direction, and also pairs of clincher links 22L and 22R as a clincher driving mechanism that guides the rotation of the clincher 20L and 20R and the movement in the direction of separating. Is provided. Furthermore, the clincher unit 2 </ b> A includes a clincher receiver 23 that pushes up the clinchers 20 </ b> L and 20 </ b> R when the clincher holder 21 moves up and down.

  The clincher unit 2A includes a clincher frame 24 that rotatably supports the clincher links 22L and 22R and guides the movement of the clincher holder 21 to which the clincher 20L and 20R are attached in the up-and-down direction. Further, the clincher unit 2A includes a return spring 25 that pushes up the clincher holder 21 and a partition plate 26 that partitions the clincher 20L and the clincher 20R and holds the orientation of the clincher 20L and 20R.

  As shown in FIG. 18, in the clincher unit 2A, the clincher 20L and the clincher 20R are arranged with their positions shifted in the left-right direction along the needle crown 10a of the staple 10 and in the front-rear direction orthogonal to the needle crown 10a. .

  The clincher 20L is disposed so as to face one needle foot 10b of the staple 10, and toward the clincher 20R disposed on the upper surface facing the needle foot 10b while being shifted in the front-rear direction as shown in FIG. A clincher surface 20La inclined in the descending direction is formed. In addition, the clincher 20L has a pressing surface 20Lb that is pressed against the clincher receiver 23 on the lower surface on one end side facing the clincher receiver 23.

  The other end portion side of the clincher 20L is rotatably supported on the upper end side of the clincher link 22L by the shaft 20Lc and is supported by the clincher holder 21 so as to be rotatable and horizontally movable.

  The clincher 20R is disposed so as to face the other needle foot 10b of the staple 10, and toward the clincher 20L disposed on the upper surface facing the needle foot 10b while being shifted in the front-rear direction as shown in FIG. A clincher surface 20Ra inclined in the descending direction is formed. In addition, the clincher 20 </ b> R has a pressing surface 20 </ b> Rb that is pressed against the clincher receiver 23 on the lower surface on one end side facing the clincher receiver 23.

  The other end portion side of the clincher 20R is rotatably supported on the upper end side of the clincher link 22R by the shaft 20Rc, and is supported by the clincher holder 21 so as to be rotatable and horizontally movable.

  The clincher holder 21 includes a front holder 21a and a rear holder 21b along the front-rear direction orthogonal to the needle crown 10a of the staple 10. The clincher holder 21 is opposed to the front holder 21a and the rear holder 21b with a space in which the clincher 20L and the clincher 20R are stacked with the partition plate 26 interposed therebetween. In this example, the clincher holder 21 is formed by bending a plate material to form a front holder 21a and a rear holder 21b.

  In the clincher holder 21, a guide hole 21L into which the shaft 20Lc of the clincher 20L is inserted and a guide hole 21R into which the shaft 20Rc of the clincher 20R is inserted are formed in the front holder 21a and the rear holder 21b. The guide hole 21L and the guide hole 21R are long holes extending in the horizontal direction along the direction in which the clincher 20L and the clincher 20R are separated from each other.

  The clincher holder 21 supports the clincher 20L so that the clincher 20L can be rotated and moved in a direction to be separated from and connected to the clincher 20R by inserting the shaft 20Lc of the clincher 20L into the guide hole 21L. In addition, the clincher holder 21 supports the clincher 20R so that the clincher 20R can rotate and move in a direction in which the clincher 20R is separated from the clincher 20L by inserting the shaft 20Rc of the clincher 20R into the guide hole 21R.

  The clincher holder 21 is positioned rearward with respect to the clinchers 20L and 20R, and a receiving portion 21c that receives the force pushed up by the return spring 25 is formed in the rear holder 21b with which the slider 3 is in contact. The receiving part 21c is formed on the lower surfaces of the left and right sides of the rear holder 21b, and the return spring 25 is pressed up from below.

  In the clincher holder 21, a height restricting portion 21 d that restricts the movement of the clincher holder 21 that is pushed up by the return spring 25 is formed in the front holder 21 a that is positioned forward of the clincher 20 </ b> L, 20 </ b> R. The height restricting portion 21d is formed to protrude from the left and right sides of the front holder 21a to the side.

  The clincher link 22L is rotatably supported by the clincher frame 24 at the lower end side by the shaft 22La, and the clincher 20L is rotatably supported by the shaft 20Lc at the upper end side. The clincher 20L and the clincher link 22L are inserted into the guide hole 21L of the clincher holder 21 so that the shaft 20Lc can move along the elongated hole shape of the guide hole 21L.

  The clincher link 22R has a lower end side rotatably supported by the clincher frame 24 by a shaft 22Ra, and a clincher 20R rotatably supported by a shaft 20Rc on the upper end side. The clincher 20R and the clincher link 22R are inserted into the guide hole 21R of the clincher holder 21 so that the shaft 20Rc can move along the elongated hole shape of the guide hole 21R.

  Accordingly, the clincher link 22L rotatably supports the clincher 20L, and moves the clincher 20L in a direction to be separated from and connected to the clincher 20R by the lifting and lowering operation of the clincher holder 21. The clincher link 22R rotatably supports the clincher 20R, and moves the clincher 20R in a direction in which the clincher 20R moves away from and in contact with the clincher 20L by the lifting and lowering operation of the clincher holder 21.

  The clincher receiver 23 is inserted between the front holder 21a and the rear holder 21b by the downward movement of the clincher holder 21, and is attached to the clincher frame 24 at a position where the clincher 20L and the clincher 20R are pressed.

  The clincher frame 24 has a clincher link 22L rotatably supported by a shaft 22La on one side along the left-right direction and a clincher link 22R rotatably supported by a shaft 22Ra on the other side along the left-right direction. Is done.

  The clincher frame 24 includes a clincher guide 24 a that guides the lifting and lowering operation of the clincher holder 21. The clincher guide 24a has a width that matches the space between the front holder 21a and the rear holder 21b of the clincher holder 21, and is inserted between the front holder 21a and the rear holder 21b. Thereby, the raising / lowering operation of the clincher holder 21 is guided while the forward tilt and the rear tilt of the clincher holder 21 are suppressed.

  The clincher link 22 </ b> L and the clincher link 22 </ b> R are supported by the clincher holder 21 at the upper end side at a smaller interval than the lower end side supported by the clincher frame 24. The clincher link 22L rotates about the shaft 22La by the lifting / lowering operation of the clincher holder 21, and the clincher link 22R rotates about the shaft 22Ra by the lifting / lowering operation of the clincher holder 21.

  As the clincher holder 21 moves up and down, the clincher link 22L and the clincher link 22R are constant without changing the distance between the shaft 22La and the shaft 22Ra on the lower end side. On the other hand, the distance between the shaft 20Lc on the upper end side and the shaft 20Rc changes.

  In other words, the clincher link 22L and the clincher link 22R are configured such that the distance between the upper end side and the lower end side is narrower, so that the clincher link 22L moves to the clincher link 22R with the shaft 22La as a fulcrum as the clincher link 22R. It rotates in the approaching direction. In addition, the clincher link 22R rotates in the direction in which the upper end side approaches the clincher link 22L with the shaft 22Ra as a fulcrum by the downward movement of the clincher holder 21.

  Further, the clincher link 22L rotates in the direction in which the upper end side is separated from the clincher link 22R with the shaft 22La as a fulcrum by the ascending operation of the clincher holder 21. In addition, the clincher link 22R rotates in a direction in which the upper end side is separated from the clincher link 22L with the shaft 22Ra as a fulcrum by the ascending operation of the clincher holder 21.

  As a result, the clincher link 22L moves the shaft 20Lc along the guide hole 21L and the clincher link 22R moves along the guide hole 21R so that the shaft 20Rc moves along the guide hole 21R. The interval of 20Rc becomes narrow. Therefore, the clincher 20L and the clincher 20R move in a direction in which the clincher holder 21 is lowered by the downward movement of the clincher holder 21.

  Further, as the clincher holder 21 is lifted, the clincher link 22L moves the shaft 20Lc along the guide hole 21L, and the clincher link 22R moves the shaft 20Rc along the guide hole 21R so that the shaft 20Lc and the shaft 20Rc are moved. The interval of becomes wider. Accordingly, the clincher 20L and the clincher 20R are moved away from each other by the upward movement of the clincher holder 21.

  Next, a configuration for holding the clincher unit at the standby position will be described with reference to the drawings. The return spring 25 is constituted by a torsion coil spring in this example, and the front end side, which is one end portion, is fixed to the clincher frame 24. As shown in FIG. 22, the return spring 25 has one end on the rear end side in contact with the receiving portion 21c on the left and right sides of the rear holder 21b on the clincher holder 21, and the other on the rear end side. Is in contact with the receiving portion 21c on the left and right sides of the rear holder 21b.

  As shown in FIG. 21, the clincher holder 21 is in contact with a shaft 22 La that supports the clincher link 22 </ b> L on the clincher frame 24 with the height restricting portion 21 d on one side of the front holder 21 a. Further, in the clincher holder 21, the height restriction portion 21 d on the left and right sides of the front holder 21 a is in contact with the shaft 22 Ra that supports the clincher link 22 R on the clincher frame 24.

  As a result, the clincher holder 21 receives the substantially equal force on the left and right sides of the receiving portion 21c by the return spring 25, the rear holder 21b is pushed up, and the front holder 21a returns the left and right height restricting portions 21d. Movement due to the push-up by the spring 25 is restricted.

  In the clincher holder 21, the rear holder 21b positioned rearward with respect to the clinchers 20L and 20R is pushed up by the return spring 25, and the front holder 21a positioned forward with respect to the clincher 20L and 20R is moved upward with the shafts 22La and 22Ra. Movement in the direction is restricted.

  As a result, the clincher holder 21 to which the clinchers 20L and 20R are attached maintains a forward tilted state in a standby state in which the clincher holder 21 is pushed by the return spring 25. In this example, the return spring 25 is arranged on the front side of the clincher unit 2A. However, the return spring 25 may be arranged on the rear side of the clincher unit 2A to apply force to the rear holder 21b.

  Next, a configuration for holding the clinchers 20L and 20R in the standby state will be described with reference to the drawings. The partition plate 26 includes a bearing portion 26La into which the shaft 20Lc of the clincher 20L is inserted, and a bearing portion 26Ra into which the shaft 20Rc of the clincher 20R is inserted.

  The partition plate 26 is inserted between the clincher 20L and the clincher 20R and supported by the shaft 20Lc and the shaft 20Rc. The bearing portions 26La and 26Ra are formed in a long hole shape in accordance with the movement of the shafts 20Lc and 20Rc accompanying the movement of the clincher 20L and 20R in the direction in which the clincher 20L and 20R are separated from each other.

  The partition plate 26 includes a clincher surface 20La of the clincher 20L in a standby state and a partition portion 26b protruding upward from the clincher surface 20Ra of the clincher 20R. The partition plate 26 includes a spring portion 26Lc bent in the clincher 20L direction and a spring portion 25Rc bent in the clincher 20R direction.

  The side surface of the clincher 20L is pressed by the spring portion 26Lc of the partition plate 26, and the side surface of the clincher 20R is pressed by the spring portion 26Rc of the partition plate 26, so that the clincher 20L and the clincher 20R are oriented in the standby state. Retained.

<Configuration example of the lower handle unit>
Next, the configuration of the lower handle unit 11a will be described with reference to the drawings. In the lower handle unit 11a, the lower handle frame 4 is made of sheet metal or the like. The lower handle frame 4 has a clincher frame 24 constituting the clincher unit 2A attached to a front position. The lower handle frame 4 has a slider 3 attached to the rear of the clincher unit 2A. Further, the lower handle frame 4 is formed with an upper handle attachment portion 40 to which the upper handle unit 11b is attached.

  The slider 3 has a locking portion 30 formed on the front side facing the clincher unit 2A, and a link receiving portion 31 formed on the rear side. The slider 3 is attached to the lower handle frame 4 so as to be slidable along the front-rear direction, and is pressed by a spring (not shown) so that the rear holder 21b of the clincher holder 21 constituting the clincher unit 2A is engaged with the locking portion 30. Move forward to the position where Further, the slider 3 moves rearward so that the locking portion 30 is detached from the rear holder 21b of the clincher holder 21.

  In the lower handle unit 11a, a lower handle cover 41 having a shape covering the lower handle frame 4 is attached to the lower handle frame 4 to which the clincher unit 2A and the slider 3 are attached.

  In the lower handle unit 11a, a clincher cover 42 that covers the clincher unit 2A is attached to the lower handle cover 41. The clincher cover 42 includes clincher 20L and clincher 20R constituting the clincher unit 2A, a partition plate 26 sandwiched between the clinchers 20L and 20R, and an opening through which the clincher holder 21 to which the clinchers 20L and 20R are attached is exposed. The clincher cover 42 has a configuration that moves up and down in conjunction with the lifting operation of the clincher holder 21 and is attached to the lower handle cover 41.

  Further, in the lower handle unit 11 a, a paper guide 43 that regulates the paper position is attached to the lower handle cover 41. The paper guide 43 is attached to the lower handle cover 41 so as to be slidable in the front-rear direction. The paper guide 43 is configured to be capable of adjusting the position at which the staple 10 is bound by being abutted against the paper guide 43.

<Configuration example of magazine unit>
As shown in FIG. 16, the magazine unit 5 includes a magazine 50 in which the staples 10 are loaded, and a magazine guide 51 in which the magazines 50 are retractably stored for loading the staples 10.

  24 and 25 are side sectional views of the main part showing an example of the magazine, FIG. 26 is a perspective view of the main part showing an example of the staple guide, and FIG. 27 is a perspective view showing an example of the staple holder. The configuration of the magazine 50 will be described with reference to the drawings.

  The magazine 50 includes a staple guide 52 that guides the staple 10 and a staple holder 53 that holds the shape of the staple 10 separated by the driver unit 6.

  The magazine 50 has an upper surface opened to form a space in which the staples 10 can be loaded, and an opening 50b is formed at a lower portion of the magazine front wall 50a to which the staples 10 are pressed so as to pass the staples 10 separated into one. Is done. Further, the magazine 50 is configured such that the inner dimension of the opposing magazine side wall 50 c is slightly wider than the outer dimension of the needle crown 10 a of the staple 10. In this example, the inner dimension of the opposing magazine side wall 50c is set so that the staple 10 whose outer dimension of the needle crown 10a described in FIG. 1 is 11.42 mm can be loaded.

  The staple guide 52 is attached to a space inside the magazine 50. A coil spring 50d is attached between the magazine 50 and the staple guide 52, and the staple guide 52 is pressed toward the magazine front wall 50a.

  The staple guide 52 is configured to be slightly narrower than the inner dimension of the needle crown 10 a of the staple 10, and a space in which the needle foot 10 b of the staple 10 can be inserted is provided between the magazine side wall 50 c and the staple guide 52.

  In this example, the width of the staple guide 52 is set so that the staple 10 whose inner dimension of the needle crown 10a described in FIG. 1 is 10.45 mm can be loaded. Further, a space is provided between the magazine side wall 50c and the staple guide 52 in which the needle foot 10b of the staple 10 having a needle wire thickness of 0.37 mm can be inserted.

  Further, in the magazine 50 configured with the above-described dimensions, the needle line width is 0.50 mm, the needle line thickness is 0.32 mm, the staple line, the needle line width, and the needle line thickness are the same as that of No. 10, and the outer dimensions of the needle crown are the same. Staples having a diameter of 11.42 mm can be loaded.

  As shown in FIG. 25, the staple guide 52 includes a shear guide portion 52a that applies a shearing force for separating the staples 10 into one, and a pressing guide that presses the separated staples 10 against the magazine front wall 50a. A width guide portion 52c for guiding the portion 52b and the needle foot 10b of the staple 10 in the width direction is provided.

  In the shear guide portion 52a, an interval t1 that is wider than the needle line width ts1 of one staple 10 and narrower than the needle line width of two staples 10 is formed between the upper surface of the front end side of the staple guide 52 and the magazine front wall 50a. It is formed with an inclined surface.

  The pressure guide portion 52b is configured such that the distance t2 between the width guide portion 52c and the magazine front wall 50a is slightly narrower than the needle line width of one staple 10 in a state where the width guide portion 52c is in contact with the magazine front wall 50a. And the staple 10 passing between the magazine front wall 50a is pressed against the magazine front wall 50a by the pressing guide portion 52b.

  Here, when the staple 10 having the length of the needle foot 10b of 10.0 mm is used as shown in FIG. 1, before the tip of the needle foot 10b reaches the paper, the needle crown 10a is pressed by the pressing guide portion. The height t3 of the shear guide portion 52a is set so as to be guided by 52b.

  The width guide portion 52c has a dimension slightly smaller than the needle line width of one staple 10, and protrudes forward from the pressing guide portion 52b. As shown in FIG. 26, the pair of left and right width guide portions 52 c are configured to have a width substantially the same as the inner dimension of the needle crown 10 a of the staple 10 and protrude from the staple guide 52 to the left and right.

  The staple holder 53 includes a needle crown guide portion 53a that holds the shape of the needle crown 10a of the staple 10 separated into one. The staple holder 53 is attached to the front end portion of the staple guide 52, the needle crown guide portion 53a is disposed between the pair of left and right pressing guide portions 52b, and the needle crown guide portion 53a faces the magazine front wall 50a of the magazine 50. .

  In the staple holder 53, the needle crown guide portion 53a is inclined so that the interval between the needle crown guide portion 53a and the magazine front wall 50a becomes narrower from the upper end side to the lower end side of the needle crown guide portion 53a. The lower end of the guide portion 53a contacts the magazine front wall 50a.

  The staple holder 53 is made of a material having elasticity, and when the staple 10 separated into one passes between the magazine front wall 50a and the staple guide 52, the staple crown 53a is pushed by the needle crown 10a and the needle crown guide portion 53a is elastic. By deforming, force is applied in the direction in which the needle crown 10a is pushed up, and deformation of the needle crown 10a is suppressed.

  FIG. 28 is a front sectional view showing an example of attachment of the staple holder, FIG. 29 is a side sectional view showing an example of attachment of the staple holder, and a configuration for attaching the staple holder 53 will be described with reference to each drawing. . The staple holder 53 has an attachment projection 53L formed on one of the left and right sides along the width direction, and an attachment projection 53R formed on the other side.

  It is preferable that two or more staple holders 53 are provided on one of the attachment convex portion 53L and the attachment convex portion 53R, and one or more are provided on the other. In this example, two positions are provided on each of the left and right side portions of the staple holder 53. Further, the mounting convex portion 53L and the mounting convex portion 53R are formed so as to protrude sideways in a symmetrical arrangement.

  In the staple guide 52, an attachment opening 52L into which the attachment protrusion 53L of the staple holder 53 is inserted is formed on one of the left and right sides along the width direction, and the attachment protrusion of the staple holder 53 is formed on the other side. A mounting opening 52R into which the portion 53R is inserted is formed.

  In the staple guide 52 and the staple holder 53, the attachment convex portions 53L and 53R of the staple holder 53 are inserted into the attachment openings 52L and 53R of the staple guide 52 at a predetermined insertion position, and the staple holder 53 is moved to the fixed position. Thus, the staple holder 53 is fixed to the staple guide 52.

  For this reason, the attachment opening 52L includes an insertion opening 52La into which the attachment protrusion 53L of the staple holder 53 at the insertion position is inserted in the operation of attaching the staple holder 53 to the staple guide 52.

  Further, the attachment opening 52L includes a support protrusion 52Lb that supports the attachment protrusion 53L of the staple holder 53 in a fixed position by an operation of moving backward with respect to the staple guide 52. Further, a position restricting portion 52 </ b> Lc for restricting the position of the staple holder 53 in the fixed position with the magazine front wall 50 a of the magazine 50 is provided.

  The attachment opening 52R includes an insertion opening 52Ra into which the attachment protrusion 53R of the staple holder 53 at the insertion position is inserted in the operation of attaching the staple holder 53 to the staple guide 52.

  Further, the attachment opening 52R includes a support protrusion 52Rb that supports the attachment protrusion 53R of the staple holder 53 at a fixed position by an operation of moving backward with respect to the staple guide 52. Furthermore, a position restricting portion 52Rc that restricts the position of the staple holder 53 at the fixed position with the magazine front wall 50a of the magazine 50 is provided.

  The attachment opening 52L is formed with insertion openings 52La at two locations and support projections 52Lb at three locations in accordance with the arrangement of the two attachment projections 53L of the staple holder 53. The insertion openings 52La and the support protrusions 52Lb are alternately arranged along the front-rear direction of the staple guide 52, and a position restricting portion 52Lc is formed at the rear end of the attachment opening 52L.

  Similarly, the attachment opening 52R is formed with insertion openings 52Ra at two locations and support projections 52Rb at three locations in accordance with the arrangement of the two attachment projections 53R of the staple holder 53. The insertion openings 52Ra and the support protrusions 52Rb are alternately arranged along the front-rear direction of the staple guide 52, and a position restricting portion 52Rc is formed at the rear end of the attachment opening 52R.

  The attachment opening 52L and the attachment opening 52R are formed such that the insertion opening 52La and the insertion opening 52Ra, and the support protrusions 52Lb and the support protrusions 52Rb are vertically symmetric.

  The method for attaching the staple holder 53 will be described. The staple holder 53 is arranged such that the attachment convex portions 53L and 53R are inserted between the left and right side walls of the staple guide 52 as shown in FIG. By tilting in the direction, the attachment convex portion 53L is inserted into the insertion opening portion 52La of the attachment opening portion 52L, and the attachment convex portion 53R is inserted into the insertion opening portion 52Ra of the attachment opening portion 52R.

  The staple holder 53 in which the mounting convex portion 53L is inserted into the insertion opening portion 52La and the mounting convex portion 53R is inserted into the insertion opening portion 52Ra has a substantially horizontal orientation as shown in FIG. Horizontal movement backward is possible.

  When the staple holder 53 in the insertion position as shown in FIG. 29 (a) is moved to the fixed position as shown in FIG. 29 (b), the mounting protrusion 53L is located between the left and right mounting openings 52L and 52R. 53R is sandwiched between the support protrusions 52Lb and 52Rb, and the staple holder 53 is restricted from rotating in a tilting direction.

  When the staple guide 52 to which the staple holder 53 is attached is attached to the magazine 50, and the coil spring 50d is attached between the magazine 50 and the staple guide 52, the staple guide 52 is pressed toward the magazine front wall 50a.

  When the staple guide 52 is pressed in the direction of the magazine front wall 50a, the needle crown guide portion 53a of the staple holder 53 is pressed against the magazine front wall 50a, and the rear end of the staple holder 53 is restricted in the position of the mounting openings 52L and 52R. The parts 52Lc and 52Rc are pressed.

  Thereby, the staple holder 53 is restricted from rotating in the tilting direction and moving in the front-rear direction in a state where the needle crown guide portion 53 a is pressed against the magazine front wall 50 a, and the magazine 50 through the staple guide 52 is regulated. Fixed to.

  In the configuration in which the staple holder is attached to the staple guide, conventionally, a convex portion is formed on the side of the staple holder, and an opening in which the convex portion of the staple holder is fitted is formed on the opposite side wall of the staple guide. The staple holder was attached by bending.

  However, the staple guide is deformed by the attachment of the staple holder, and there is a possibility that the dimensional accuracy of the parts required for staple driving, clinching, or the like cannot be ensured.

  In the present embodiment, when the staple holder 53 is attached to the staple guide 52, a force that deforms the component is not applied. As a result, the staple guide 52 and the like are not deformed by the attachment of the staple holder 53, and the dimensional accuracy of the parts required for driving out the staple 10 or clinching can be secured.

  Next, the configuration of the magazine guide 51 will be described with reference to the drawings. The magazine guide 51 has a front surface, an upper surface, and a rear surface opened to form a space in which the magazine 50 is housed so that it can be pulled out from the front surface.

  The magazine guide 51 includes a lock mechanism 54 that locks and unlocks the magazine 50 that is retractably stored. The magazine guide 51 includes a pusher 55 that pushes forward the staple 10 loaded in the magazine 50, a pusher spring 55a that pushes the pusher 55, and a spring guide 56 that guides the pusher spring 55a.

  Furthermore, the magazine guide 51 includes a guide cover 57 that guides the movement of the magazine 50 in the storage direction and the movement in the pull-out direction, and guides the staple 10 pressed by the pusher 55 together with the staple guide 52.

  The pusher 55 is attached inside the magazine 50 accommodated in the magazine guide 51 so as to be movable in the front-rear direction along the staple guide 52. The guide cover 57 is attached to the upper surface of the magazine guide 51, and guides the movement of the magazine 50 in the storage direction and the movement in the pull-out direction together with the magazine guide 51. Further, the staple 10 pressed by the pusher 55 is guided together with the staple guide 52.

  The pusher spring 55 a presses the pusher 55 toward the magazine front wall 50 a of the magazine 50. The pusher spring 55a is housed in the guide cover 57, and in this example, is connected to the pusher 55 in a U shape by a spring guide 56 attached to the front end side of the magazine guide 51.

  The magazine unit 5 includes a link 58 that transmits the movement of the upper handle unit 11b to the slider 3 of the lower handle unit 11a, and locks and unlocks the clincher unit 2A at the standby position.

  In the present embodiment, the link 58 is rotatably attached to the magazine guide 51 with the shaft 58a as a fulcrum, and the slider pressing portion 58b formed at one end of the substantially L shape is the link receiving portion 31 of the slider 3. The driver pressing portion 58c formed at the other end is pressed by the driver unit 6.

  The link 58 is configured with a weight distribution in which the slider pressing portion 58b rotates by its own weight in the direction in which the slider pressing portion 58b contacts the link receiving portion 31 of the slider 3, and the state in which the slider pressing portion 58b and the link receiving portion 31 are always in contact is maintained. . As a result, as shown in FIG. 7, in the link 58, the slider pressing portion 58 b is located behind the front end of the upper handle mounting portion 40 of the lower handle frame 4.

  The binding position of the staple 10 with respect to the paper is determined by the distance between the clincher 20L, 20R of the clincher unit 2A and the paper guide 43. For this reason, the slider pressing portion 58b of the link 58 is positioned behind the front end of the upper handle mounting portion 40 of the lower handle frame 4 so that the movement position of the paper guide 43 is reached to the front end of the upper handle mounting portion 40. Can be. Therefore, the distance from the edge of the paper to the binding position of the staple 10 can be increased.

  FIG. 30 is a side sectional view showing an example of the locking mechanism, and FIG. 31 is a plan sectional view of an essential part showing an example of the locking mechanism. Next, the configuration of the locking mechanism 54 will be described with reference to each drawing. .

  The lock mechanism 54 includes a magazine stopper 54a that locks the magazine 50 in the storage position, and a pusher switch 54b that moves the magazine stopper 54a. The lock mechanism 54 includes a magazine lock spring 54c that applies a force for pushing the magazine 50 in the ejecting direction and applies a force for rotating the magazine stopper 54a in the locking direction.

  The magazine stopper 54a has a lock claw 54d that fits into a lock opening 50e formed on the bottom surface on the rear end side of the magazine 50 at one end of a substantially L shape, and is a spring pressing portion 54e that is pushed by the magazine lock spring 54c. At the other end of the substantially L shape. The magazine stopper 54a is supported by the magazine guide 51 in a state where the magazine stopper 54a can rotate about a shaft 54f provided between the lock claw 54d and the spring pressing portion 54e.

  The pusher switch 54b is provided with a switch portion 54g that is manually pressed on the rear end side, and is rotatable via the shaft 54h and the other substantially L-shaped end portion on which the spring pressing portion 54e of the magazine stopper 54a is formed. Connected. The pusher switch 54b has a magazine lock spring 54c attached to the front end side across the shaft 54h.

  When the magazine 50 is stored in the magazine guide 51, the magazine lock spring 54c comes into contact with the staple guide 52 of the magazine 50, and comes into contact with the spring pressing portion 54e of the magazine stopper 54a. The magazine lock spring 54c is prevented from coming off from the pusher switch 54b when the magazine 50 is pulled out by a retaining prevention convex portion 54i formed at the front end of the pusher switch 54b.

  In a state where the magazine 50 is housed in the magazine guide 51, as shown in FIG. 30A, between the rear end side of the staple guide 52 attached to the magazine 50 and the spring pressing portion 54e of the magazine stopper 54a. The magazine lock spring 54c is compressed.

  The magazine stopper 54a is rotated about the shaft 54f in a direction in which the lock claw 54d fits into the lock opening 50e of the magazine 50 when the spring pressing portion 54e is pressed, and the lock claw 54d is moved to the lock opening 50e. Fit.

  As a result, the magazine 50 is held in the magazine guide 51. Further, in the magazine 50, when the staple guide 52 is pressed by the magazine lock spring 54c, the staple guide 52 is moved in front of the magazine by the magazine lock spring 54c together with the coil spring 50d attached between the magazine 50 and the staple guide 52. It is pressed in the direction of the wall 50a.

  When the switch 54g is pushed, the pusher switch 54b rotates the magazine stopper 54a connected via the shaft 54h with the shaft 54f as a fulcrum, as shown in FIG. 30B, to lock the magazine stopper 54a. The claw 54d is removed from the lock opening 50e of the magazine 50.

  When the lock claw 54d of the magazine stopper 54a is removed from the lock opening 50e of the magazine 50, the force is restored by the compressed magazine lock spring 54c and the force applied by the pulled pusher spring 55a is pressed by the pusher 55. With this force, the magazine 50 is pressed forward, and the magazine 50 is pulled out from the magazine guide 51.

<Configuration example of driver unit>
Next, the configuration of the driver unit 6 will be described with reference to the drawings. The driver unit 6 includes a driver 60 that presses the leading one of the staples 10 loaded in the magazine 50 and penetrates the paper, and a driver arm 61 that presses the driver 60 and the link 58.

  The driver 60 has a plate thickness that matches the needle line width of one staple 10 and has a staple pressing portion 60a having a width that matches the outer dimension of the needle crown 10a of the staple 10 provided on the lower end side. It is comprised by the member of. Further, the driver 60 is provided with a shaft portion 60 b supported by the driver arm 61 and a driver pressing portion 60 c pressed by the driver arm 61 on the upper end side.

  The driver arm 61 includes a pressing surface 61a that presses the driver pressing portion 60c of the driver 60, and a driver guide groove 61b that supports the shaft portion 60b of the driver 60 and guides the driver 60 so that the driver 60 can rotate and slide.

  The driver arm 61 is configured by a curved surface having a pressing surface 61a curved in a concave shape, and the driver guide groove 61b is configured by a long hole curved in a concave shape extending in the front-rear direction following the pressing surface 61a.

  The magazine unit 5 and the driver unit 6 are attached to the upper handle mounting portion 40 of the lower handle frame 4 in a state where the magazine guide 51 and the driver arm 61 are rotatable about the shaft 54f. In this example, the magazine guide 51 and the driver arm 61 rotate coaxially with the magazine stopper 54a.

  In the driver unit 6, the driver 60 attached to the driver arm 61 is guided along the magazine front wall 50 a of the magazine 50 by a spring guide 56 attached to the magazine guide 51.

  The relative positional relationship between the driver 60 and the magazine 50 does not change while the magazine 50 and the paper do not contact each other and the driver arm 61 and the magazine guide 51 rotate integrally with the shaft 54f as a fulcrum.

  When a sheet is sandwiched between the clincher unit 2 </ b> A and the magazine 50 and the driver arm 61 rotates with respect to the magazine guide 51, the driver 60 is pressed against the driver arm 61 by the rotation of the driver arm 61 with respect to the magazine guide 51.

  Since the shaft portion 60b of the driver 60 is movable along the driver guide groove 61b, the position where the pressing surface 61a of the driver arm 61 contacts the driver pressing portion 60c of the driver 60 is displaced with the rotation of the driver arm 61. To do. As a result, the angle of the driver 60 that presses the staple 10 is maintained at a predetermined angle.

  In the standby state, the driver arm 61 is formed with an idle running space 61c between the driver pressing portion 58c of the link 58, and the driver arm 61 and the link 58 are not in contact with each other. While the magazine 50 and the paper do not contact each other and the driver arm 61 and the magazine guide 51 rotate integrally with the shaft 54f as a fulcrum, an empty running space 61c between the driver arm 61 and the driver pressing portion 58c of the link 58 is provided. Is retained.

  Then, a sheet is sandwiched between the clincher unit 2A and the magazine 50. When the driver arm 61 rotates with respect to the magazine guide 51, the link 58 is pressed by the rotation operation of the driver arm 61, and the link 58 is rotated about the shaft 58a to operate the slider 3.

<Configuration example of handle unit>
The handle unit 7 includes a handle arm 70 that presses the driver arm 61, an upper handle cover 71 that covers the handle arm 70, and a front cover 72 that covers a gap formed between the upper handle cover 71 and the driver arm 61. .

  The handle arm 70 includes a shaft hole portion 70b inserted into a shaft 70a attached to the upper handle attachment portion 40 of the lower handle frame 4, and is attached to the lower handle frame 4 via the shaft 70a and the shaft hole portion 70b. The handle arm 70 is connected to the driver arm 61 supported by the upper handle mounting portion 40 of the lower handle frame 4 by the shaft 54f by the shaft 70c.

  The handle arm 70 has a shaft hole portion 70b having a predetermined elongated hole shape. In this example, the distance between the shaft hole portion 70 b and the shaft 54 f serving as the rotation fulcrum of the driver arm 61 changes in a predetermined pattern as the handle arm 70 and the driver arm 61 rotate.

  The handle unit 7 and the driver unit 6 are configured such that the distance between the point at which the force is applied to the handle arm 70 and the shaft hole portion 70b that is the rotation fulcrum of the handle arm 70, and the shaft 70c and the shaft hole that are points at which the force is applied to the driver arm 61 The handle 70 is hung on the basis of the ratio of the distance to the portion 70b, the distance between the shaft 70c and the shaft 54f serving as the rotation fulcrum of the driver arm 61, and the distance between the point where the force is applied to the driver 60 and the shaft 54f. A booster mechanism with reduced load is realized.

  The shape of the shaft hole 70b is configured so that the load is heavy at the initial stage of pressing the handle arm 70, and the load becomes light when the staple 10 penetrates the paper.

  By providing such a booster mechanism, the stroke of the handle arm 70 becomes longer, and a gap is generated between the upper handle cover 71 and the driver arm 61 attached to the handle arm 70. Therefore, as shown in FIG. 4, a front cover 72 that covers the gap between the upper handle cover 71 and the driver arm 61 is attached.

  FIG. 32 is a perspective view showing an example of the front cover. The front cover 72 has a shape that covers the front and side of the gap between the upper handle cover 71 and the driver arm 61. As shown in FIG. 4, the front cover 72 has a shaft 72 a provided at one end inserted into a shaft hole 70 d provided in the handle arm 70, and is rotatable with the shaft 72 a as a fulcrum. Is attached to the handle arm 70.

  Further, as shown in FIG. 32, the front cover 72 has a groove 72b formed at the other end inserted into a guide projection 61d provided on the driver arm 61, and rotates and rotates the guide projection 61d as a fulcrum. It is attached to the driver arm 61 in a slidable state. In this example, the guide convex portion 61d has a T shape and is provided with a retaining portion 61e. The guiding convex portion 61d is inserted into the groove portion 72b of the front cover 72 so as to be slidable and rotatable, and the groove portion 72b. Is prevented from coming off.

  The mounting structure of the front cover 72 and the driver arm 61 is such that a guide convex portion having a retaining prevention shape is provided on the front cover 72 side, and the guide convex portion is inserted on the driver arm 61 side so as to be rotatable and slidable. It is good also as a structure provided with the groove part made. Further, the front cover 72 and the driver arm 61 are rotatably connected by the shaft portion and the shaft hole portion, and the front cover 72 and the handle arm 70 can be rotated and slid by the long hole-shaped shaft hole portion and the shaft portion. It is good also as a structure to connect.

<Operation example of stapler of this embodiment>
FIG. 33 is a side sectional view showing the operation of binding sheets with the stapler according to the present embodiment, and FIG. 34 is a perspective view showing the operation of binding sheets with the stapler according to the present embodiment. The operation of binding sheets with the stapler 1A of the present embodiment will be described.

  First, in the standby state of the stapler 1A, as shown in FIG. 33A, the gap between the upper handle cover 71 and the driver arm 61 is covered with a front cover 72 attached to the upper handle cover 71 and the driver arm 61. ing. This prevents any object from being inserted into the gap between the upper handle cover 71 and the driver arm 61.

  In the operation of binding the paper, the paper P is placed on the lower handle cover 41 and the clincher cover 42 of the lower handle unit 11a. In the stapler 1A, the position of the paper guide 43 is adjusted, and the paper P is abutted against the paper guide 43, so that the binding position by the staple 10 is adjusted.

  When the paper P is placed and the upper handle cover 71 is pushed in the arrow A direction from the standby state, the handle arm 70 covered by the upper handle cover 71 is moved between the shaft 70a and the shaft hole portion 70b shown in FIG. Rotates with the contact as a moving fulcrum As the handle arm 70 rotates, the driver arm 61 is pressed by the displacement of the shaft 70c, and the driver arm 61 rotates about the shaft 54f.

  The handle unit 7 and the driver unit 6 are configured such that the distance between the point where the force is applied to the handle arm 70 and the shaft hole 70b, the ratio between the shaft 70c and the shaft hole 70b, and the distance between the shaft 70c and the shaft 54f. And the load applied to the handle arm 70 is reduced by the ratio of the distance between the point where the force is applied to the driver 60 and the shaft 54f. Due to the shape of the shaft hole 70b, the load is heavy at the initial stage of pressing the handle arm 70, and the load becomes light when the staple 10 penetrates the sheet P as shown in FIG.

  When the upper handle cover 71 is pushed, the gap between the upper handle cover 71 and the driver arm 61 is gradually reduced. The front cover 72 rotates with respect to the handle arm 70 as a fulcrum with respect to the handle arm 70 in accordance with the displacement of the upper handle cover 71, the handle arm 70, and the driver arm 61.

  On the other hand, as shown in FIG. 4, the driver arm 61 rotates and slides with the guide convex portion 61d as a fulcrum by the engagement of the groove portion 72b and the guide convex portion 61d. When the gap between the upper handle cover 71 and the driver arm 61 is displaced in a narrowing direction, the distance between the shaft portion 72a on the handle arm 70 side and the guide convex portion 61d on the driver arm 61 side is shortened. As a result, the front cover 72 can follow the displacement of the gap between the upper handle cover 71 and the driver arm 61.

  Further, the front cover 72 is engaged with the handle arm 70 by the shaft portion 72a and does not easily come off. The driver arm 61 moves freely with respect to the displacement of the gap between the upper handle cover 71 and the driver arm 61 by the engagement of the groove 72b and the guide convex portion 61d, but does not easily come off. . Thereby, only the front cover 72 is moved, and any object is prevented from being caught in the gap between the upper handle cover 71 and the driver arm 61.

  FIG. 35 is an operation explanatory view showing an example of staple driving operation in the stapler of the present embodiment. Next, referring to each drawing, operations of the magazine unit 5 and the driver unit 6 when driving the staple 10 Will be described.

  In the initial stage when the handle arm 70 is pressed from the standby state, the magazine 50 and the paper P do not contact each other, and the driver arm 61 and the magazine guide 51 rotate integrally with the shaft 54f as a fulcrum.

  When the paper P is sandwiched between the clincher unit 2A and the magazine 50, the rotation of the magazine guide 51 is restricted, and the handle arm 70 is further pressed, so that the driver arm 61 rotates with respect to the magazine guide 51.

  When the driver arm 61 rotates with respect to the magazine guide 51, the driver 60 is pressed against the driver arm 61. As shown in FIG. 1, in the configuration in which the staple 10 in which the length of the needle foot 10b is 10.0 mm can be used, a long stroke of the driver is required. For this reason, in the configuration in which the driver is fixed to the driver arm, the change in the angle of the driver with respect to the magazine front wall 50a of the magazine 50 increases as the driver arm 61 rotates.

  On the other hand, as the driver 60 rotates, the position where the pressing surface 61a of the driver arm 61 and the driver pressing portion 60c of the driver 60 are in contact with each other is displaced, and the angle of the driver 60 that presses the staple 10 is The magazine 50 is maintained at a predetermined angle along the magazine front wall 50a.

  When the staple 10 loaded in the magazine 50 is pressed by the driver 60, the leading one of the staples 10 is positioned on the gap formed by the shear guide portion 52a shown in FIG. 25, and the second and subsequent staples are staple guides. Since it is in a state of being supported on the upper surface of 52, a shearing force is applied to the first staple 10 to separate them.

  The staple 10 pressed by the driver 60 enters the gap between the magazine front wall 50a and the pressing guide portion 52b through the gap between the magazine front wall 50a and the shear guide portion 52a.

  As described above, in the magazine 50, the staple guide 52 is pressed forward by the coil spring 50d and the magazine lock spring 54c, and the width guide portion 52c of the staple guide 52 is moved in front of the magazine except in the step of driving out the staple 10. It is in contact with the wall 50a.

  The pressing guide portion 52b is configured such that the interval t2 with the magazine front wall 50a is slightly narrower than the needle line width of one staple 10 in a state where the width guide portion 52c is in contact with the magazine front wall 50a.

  As a result, the staple 10 pressed by the driver 60 pushes the pressing guide portions 52b on the left and right ends of the needle crown 10a, elastically deforms the coil spring 50d in the pulling direction, and elastically compresses the magazine lock spring 54c. The staple guide 52 is retracted in the arrow R direction by being deformed.

  By retracting the staple guide 52, the staple 10 that enters between the pressing guide portion 52b and the magazine front wall 50a is moved by the coil spring 50d and the magazine lock spring 54c so that both ends of the needle crown 10a are pressed by the pressing guide portion 52b. 50a is pressed.

  In order to separate and drive out one staple by pressing with a driver, it is necessary to provide a gap wider than the staple line width of one staple between the front end of the staple guide and the front wall of the magazine. In a section where the gap between the leading end of the staple guide and the magazine front wall is wider than the staple line width of the staple, the staple crown of the staple can move back and forth.

  For this reason, there is a possibility that the posture of the staple is changed before the leading end of the staple foot of the staple lands on the paper and starts to penetrate. For staples with a long needle foot, even after the tip of the staple foot of the staple has landed on the paper and started to penetrate, the gap between the staple guide tip and the magazine front wall is larger than the staple line width of the staple. There was a possibility that the posture of the staple could change during the penetration of the needle foot due to the presence of the crown.

  In the present embodiment, the staple guide 52 is provided with a shear guide portion 52a and a pressing guide portion 52b, so that the staple 10 is separated into one by the shear guide portion 52a and the staple of the staple 10 separated into one. The crown 10a can be guided by the pressing guide portion 52b.

  Since the staple 10 passing between the pressing guide portion 52b and the magazine front wall 50a is pressed against the magazine front wall 50a by the pressing guide portion 52b at both ends of the needle crown 10a, a gap through which the staple crown 10a of the staple 10 can move back and forth. Does not occur.

  Further, as described above, as shown in FIG. 1, even when the staple 10 having the length of the needle foot 10b of 10.0 mm is used, before the tip of the needle foot 10b reaches the paper, the needle crown The shape of the shear guide portion 52a is set so that 10a is guided by the pressing guide portion 52b.

  Thereby, it is possible to prevent the posture of the staple 10 from changing before the leading end of the needle foot 10b of the staple 10 lands on the paper P and starts to penetrate. Further, before the tip of the needle foot 10b of the staple 10 lands on the paper P and begins to penetrate, the needle crown 10a passes through the shear guide portion 52a and is guided by the pressing guide portion 52b, so that the needle foot 10b penetrates. It is possible to prevent the posture of the staple 10 from changing.

  The staple 10 in the section where the needle crown 10a is guided by the pressing guide 52b is guided by the width guide 52c so that the distance between the two needle feet 10b is guided by the width guide 52c. It can be carried out.

  When the needle crown 10a passes through the pressing guide portion 52b, the staple 10 pressed by the driver 60 further retracts the staple guide 52 and enters a gap formed between the width guide portion 52c and the magazine front wall 50a. The staple 10 in the section where the needle crown 10a is guided between the width guide portion 52c and the magazine front wall 50a has no guide in the width direction at the width guide portion 52c because the needle foot 10b penetrates the paper P. However, it is possible to prevent the staple posture from changing.

  The staple 10 in the section where the needle crown 10a is guided by the pressing guide portion 52b and the staple 10 in the section where the needle crown 10a is guided between the width guide portion 52c and the magazine front wall 50a are staple holder 53. A force is applied in the direction in which the needle crown 10a is pushed up by the needle crown guide portion 53a. Thereby, it is possible to prevent deformation of the vicinity of the center of the needle crown 10a being bent downward by the pressing of the driver 60.

  The staple 10 according to the present embodiment has a narrower needle line width and needle line thickness than staples called No. 3 and No. 3 U, so even in an operation of binding about 80 sheets, which is the maximum number of sheets to be bound. The through load is reduced. Further, the load applied to the handle arm 70 is reduced by the booster mechanism. Accordingly, the paper P can be bound with a light operation force by using a small stapler in which the handle arm 70 or the like is shortened as compared with the conventional large stapler.

  Further, in the staple 10 of the present embodiment, the needle line width and needle line thickness are thicker than that of the staple referred to as No. 10, and the outer dimension of the needle crown 10a also takes into account the length of the needle foot 10b. Shorter than the staple called No.3. Thereby, even in the operation of binding about 80 sheets, the buckling strength is improved and the function of the staple holder 53 is added, so that the vicinity of the center of the needle crown 10a is bent downward by the pressing of the driver 60. Deformation can be prevented.

  FIG. 36 is a side view of the main part showing an example of the operation of the slider. Next, the operation of transmitting the movement of the link 58 in the upper handle unit 11b to the slider 3 will be described with reference to each drawing.

  In the standby state, as shown in FIG. 36A, the slider 3 is advanced to the clincher lock position, and the rear holder 21b of the clincher holder 21 constituting the clincher unit 2A is placed on the locking portion 30. Thereby, the downward movement of the clincher holder 21 is restricted.

  As shown in FIGS. 33 (a) and 34 (a), the driver arm 61 forms a free running space 61c between the driver pressing portion 58c of the link 58 and the driver arm 61 and the link 58 in the standby state. Are not touching.

  While the magazine 50 and the paper P do not contact each other and the driver arm 61 and the magazine guide 51 rotate integrally with the shaft 54f as a fulcrum, the idle running space between the driver arm 61 and the driver pressing portion 58c of the link 58 61c is held. On the other hand, when the driver arm 61 and the magazine guide 51 rotate integrally with the shaft 54 f as a fulcrum, the link 58 is displaced with respect to the link receiving portion 31 of the slider 3.

  The slider 3 and the link 58 contact the link receiving portion 31 and the slider pressing portion 58b from the standby state. Therefore, the slider 3 and the link 58 are set such that the shape of the link receiving portion 31 and the slider pressing portion 58b is such that the slider 3 does not move when the link 58 is displaced as the magazine guide 51 rotates with the shaft 54f as a fulcrum. The

  When the paper P is sandwiched between the clincher unit 2A and the magazine 50 and the driver arm 61 rotates with respect to the magazine guide 51, the staple 10 separated into one is driven out by the driver 60 as described above, and the staple 10 Needle foot 10b penetrates the paper P.

  When the driver arm 61 rotates with respect to the magazine guide 51, the idle running space 61c between the driver arm 61 and the link 58 is gradually narrowed. Then, after the leading end of the staple foot 10b of the staple 10 is removed from the back surface of the paper P, the driver arm 61 and the driver pressing portion 58c of the link 58 come into contact with each other as shown in FIGS. 33 (b) and 34 (b).

  At the stage where the driver arm 61 and the driver pressing portion 58c of the link 58 start to contact, as shown in FIG. 36B, the slider 3 does not move again, and the rear holder 21b of the clincher holder 21 moves to the locking portion 30. The lowering of the clincher holder 21 is restricted.

  When the handle arm 70 is further pressed and the driver arm 61 is further rotated with respect to the magazine guide 51, the link 58 is pressed by the rotation of the driver arm 61, as shown in FIGS. 33 (c) and 34 (c). As shown, the link 58 rotates about the shaft 58a.

  When the link 58 rotates, the link receiving portion 31 of the slider 3 is pushed by the slider pushing portion 58b. As a result, as shown in FIG. 36C, the slider 3 is retracted, the locking portion 30 is removed from the rear holder 21b of the clincher holder 21, and the clincher holder 21 can be lowered.

  In a conventional stapler equipped with a flat clinching mechanism and a booster mechanism, the end of the link is pivotally supported with respect to the driver arm, the paper is sandwiched between the clincher and the magazine, and the driver arm is attached to the magazine. At the timing when rotation starts, the link also starts rotating.

  On the other hand, the operation timing of the slider needs to be after the tip of the staple foot of the staple has penetrated the paper so that the penetrating load when the staple penetrates the paper does not overlap the load pulling the slider. For this reason, in the conventional stapler, an idle running space is provided between the slider pressing portion of the link and the slider. However, in the configuration using staples having a long needle foot, the stroke of the driver arm is large and the amount of operation of the link needs to be increased, so that the idle running space between the link and the slider becomes long.

  In order to increase the operation amount of the link, it is necessary to provide a slider pressing portion on the front side, and the insertion amount in the depth direction of the binding position of the sheet cannot be increased. In addition, the apparatus becomes larger in order to increase the amount of link operation.

  On the other hand, in the present embodiment, the link 58 is pivotally supported on the magazine guide 51, and the idle running space 61c is provided between the driver pressing portion 58c of the link 58 and the driver arm 61. Further, the link 58 has a weight distribution in which the slider pressing portion 58b rotates by its own weight in the direction in which the slider pressing portion 58b contacts the link receiving portion 31 of the slider 3, and the slider pressing portion 58b of the link 58 contacts the link receiving portion 31 of the slider 3 from the standby position. It was set as the structure made to do.

  By providing the idle running space 61 c between the link 58 and the driver arm 61, the timing when the paper P is sandwiched between the clincher unit 2 </ b> A and the magazine 50 and the driver arm 61 starts to rotate with respect to the magazine guide 51. Then, the link 58 does not start rotating. Then, after the leading end of the needle foot 10b of the staple 10 penetrates the paper P, the link 58 can start to rotate.

  As a result, even in the configuration in which the staple 10 having the length of the needle foot 10b of 10.0 mm can be used, the operation amount of the link 58 is reduced, and the configuration shown in FIGS. 7 and 33A, FIG. Even in the standby state shown, the state in which the slider pressing portion 58b and the link receiving portion 31 are always in contact is maintained, and the slider pressing portion 58b of the link 58 is located behind the front end of the upper handle mounting portion 40 of the lower handle frame 4. It can be configured.

  In the standby state, the slider pressing portion 58b of the link 58 is positioned behind the front end of the upper handle mounting portion 40 of the lower handle frame 4 so that the movement position of the paper guide 43 is set to the front end of the upper handle mounting portion 40. Can be up to.

  Therefore, as shown in FIG. 33A, if the position of the sheet guide 43 is the front end of the upper handle mounting portion 40, the distance from the end of the sheet P to the binding position of the staple 10 can be increased. . Further, if the position of the paper guide 43 is brought close to the clincher unit 2A, the distance from the end of the paper P to the binding position of the staple 10 can be shortened.

  FIG. 37 is a side sectional view showing an operation of binding sheets with a stapler according to a modification. In the modification of the present embodiment, the link 58D is in contact with the link receiving portion 31 of the slider 3 at the slider pressing portion 58e formed at one end of the substantially L shape. Further, the link 58D has a configuration in which the tip which is the other end is pivotally supported with respect to the driver arm 61F, and includes a slot 61g into which the shaft 58f of the link 58D is slidably inserted into the driver arm 61F. Thus, an empty running space 61h is provided.

  Further, the link 58D is provided with a sliding support portion 58g mounted on the magazine guide 51 at a substantially L-shaped apex portion between the slider pressing portion 58e and the shaft 58f, and is slidably supported on the upper surface of the magazine guide 51. The

  The link 58D is configured with a weight distribution in which the slider pressing portion 58e rotates by its own weight in a direction in contact with the link receiving portion 31 of the slider 3. The slider pressing portion 58e and the link receiving portion 31 are always in contact with each other, and the shaft 58f is a long hole. The state where the idle running space 61h is provided at the lower end side of 61g is maintained.

  The operation of the modified example will be described. As shown in FIG. 37A, the link 58D and the driver arm 61F have the shaft 58f of the link 58D positioned on the lower end side of the long hole 61g of the driver arm 61F in the standby state. An empty running space 61h is formed.

  While the magazine 50 and the paper P do not contact each other and the driver arm 61F and the magazine guide 51 rotate integrally with the shaft 54f as a fulcrum, there is no space between the slot 61g of the driver arm 61F and the shaft 58f of the link 58D. A running space 61h is maintained. On the other hand, when the driver arm 61F and the magazine guide 51 rotate integrally with the shaft 54f as a fulcrum, the link 58D is displaced with respect to the link receiving portion 31 of the slider 3.

  The slider 3 and the link 58D contact the link receiving portion 31 and the slider pressing portion 58e from the standby state. Therefore, the slider 3 and the link 58D are set such that the shape of the link receiving portion 31 and the slider pressing portion 58e is such that the slider 3 does not move when the link 58D is displaced as the magazine guide 51 rotates with the shaft 54f as a fulcrum. The

  When the paper P is sandwiched between the clincher unit 2A and the magazine 50 and the driver arm 61F rotates with respect to the magazine guide 51, the staple 10 separated into one is driven out by the driver 60 as described above, and the staple 10 Needle foot 10b penetrates the paper P.

  When the driver arm 61F rotates with respect to the magazine guide 51, the elongated hole 61g of the driver arm 61F is displaced with respect to the shaft 58f of the link 58D, and the idle running space 61h is gradually narrowed. Then, after the leading end of the staple foot 10b of the staple 10 has come off from the back surface of the paper P, as shown in FIG. 37 (b), 58f of the link 58D comes into contact with the upper end of the long hole 61g of the driver arm 61F.

  When 58f of the link 58D starts to contact the upper end of the long hole 61g of the driver arm 61F, the slider 3 does not move again, and the rear holder 21b of the clincher holder 21 is placed on the locking portion 30, and the clincher holder 21 is restricted.

  When the handle arm 70 is further pressed and the driver arm 61F further rotates with respect to the magazine guide 51, the link 58D is pressed by the rotation of the driver arm 61F and the long hole 61g presses the shaft 58f. As shown in (c), the link 58D rotates with the contact point between the sliding support portion 58g and the magazine guide 51 as a movement fulcrum.

  When the link 58D rotates, the link receiving portion 31 of the slider 3 is pushed by the slider pushing portion 58e. As a result, the slider 3 moves backward, the locking portion 30 is detached from the rear holder 21b of the clincher holder 21, and the clincher holder 21 can be lowered.

  Even in the modification, the operating amount of the link 58D can be reduced by providing the idle running space 61h by the shaft 58f of the link 58D and the long hole 61g of the driver arm 61F.

  As another modification, the link is pivotally supported with respect to the driver arm, and the driver arm is provided with an elongated hole into which the link shaft is slidably inserted so that the link moves in the direction of the driver arm. It is guided so that it can move along. The link has a slider pressing portion formed at one end of the substantially L shape in contact with the slider, and a driver pressing portion formed at the other end is pressed by the driver arm. And it is good also as a structure which provides a free running space between a driver press part and a driver arm. Further, the shape of the link is not limited to the L shape, and it is sufficient that a contact portion with the slider can be formed on one end side and a contact portion with the driver arm can be formed on the other end side.

  38 to 40 are operation explanatory views showing an example of the operation of the clincher unit. Next, the operation of the flat clinching mechanism will be described with reference to each drawing.

  When the paper P is placed at a predetermined position and the upper handle cover 71 is pressed, the staple 10 separated into one is driven out by the driver 60 as described above, and as shown in FIG. The needle foot 10b of the staple 10 pierces the paper P and starts to penetrate. When the needle foot 10b of the staple 10 starts to penetrate the paper P, the slider 3 does not move again, and the rear holder 21b of the clincher holder 21 is placed on the engaging portion 30 as described with reference to FIG. And the lowering of the clincher holder 21 is restricted.

  When the staple 10 is further driven out by the driver 60 and the tip of the needle foot 10b penetrates the paper P and protrudes from the back surface of the paper P, one needle foot 10b pushes the clincher 20L, and the other needle foot 10b pushes the clincher 20R. Push. At the stage where the tip of the needle foot 10b starts to protrude from the back surface of the paper P, the slider 3 does not move again and the rear holder 21b of the clincher holder 21 rests on the locking portion 30 as shown in FIG. And the lowering of the clincher holder 21 is restricted.

  The side surface of the clincher 20L is pressed by the spring portion 26Lc of the partition plate 26, and the side surface of the clincher 20R is pressed by the spring portion 26Rc of the partition plate 26, so that the orientation is maintained. However, the pressing force of the staple 10 by pressing of the driver 60 is stronger than the pressing force of the spring portion of the partition plate 26.

  As a result, as shown in FIGS. 38B and 40A, the clincher 20L rotates downward with the shaft 20Lc as a fulcrum when the clincher surface 20La is pressed against one needle foot 10b of the staple 10. The clincher 20R rotates downward about the shaft 20Rc when the clincher surface 20Ra is pressed against the other needle foot 10b of the staple 10.

  When the staple 10 is further driven out by the driver 60 and the leading end of the needle foot 10b penetrates the paper P, the slider 3 moves backward as shown in FIG. The locking portion 30 is detached from the side holder 21b, and the clincher holder 21 can be lowered.

  Thus, the clincher holder 21 is lowered as shown in FIG. 39A by the force with which the upper handle cover 71 is pushed and the magazine 50 pushes the clincher holder 21 through the paper P. With the downward movement of the clincher holder 21, the clincher link 22L rotates in a direction in which the upper end side approaches the clincher link 22R with the shaft 22La as a fulcrum. In addition, the clincher link 22R rotates in the direction in which the upper end side approaches the clincher link 22L with the shaft 22Ra as a fulcrum by the downward movement of the clincher holder 21.

  Thus, the clincher link 22L moves with the shaft 20Lc along the guide hole 21L and the clincher link 22R moves along the guide hole 21R with the shaft 20Lc. The interval between the shafts 20Rc becomes narrower. Therefore, the clincher holder 21 descends and moves horizontally in the direction in which the clincher 20L and the clincher 20R approach.

  Further, by the downward movement of the clincher holder 21, the clincher 20L has the pressing surface 20Lb pressed against the clincher receiver 23, and the clincher 20R has the pressing surface 20Rb pressed against the clincher receiver 23.

  Accordingly, the clincher 20L rotates upward with the shaft 20Lc as a fulcrum when the pressing surface 20Lb is pushed up by the clincher receiver 23, and the clincher 20R pushes the shaft 20Rc by pushing up the pressing surface 20Rb to the clincher receiver 23. Rotate upward to the fulcrum.

  Accordingly, the clincher 20L and the clincher 20R move in the direction in which the clincher 20L and the clincher 20R approach each other on the one needle foot 10b of the staple 10 that contacts the clincher 20L and the clincher surface 20La and the other needle foot 10b that contacts the clincher 20R and the clincher surface 20Ra. A force to be bent inside is applied. Then, the clincher 20L and the clincher 20R are turned upward to be bent inward.

  When the upper handle cover 71 is pushed and the magazine 50 pushes the clincher holder 21 through the paper P and the clincher holder 21 is lowered to the lowermost position, it is pushed up to the clincher receiver 23 as shown in FIG. The clincher 20L and the clincher 20R thus returned return to a substantially horizontal position. Thereby, the needle foot 10b of the staple 10 penetrating the paper P is bent along the surface of the paper P, and the clinch is completed.

  In a configuration in which the staple foot of the staple is bent by rotating the pair of left and right clincher, when the number of sheets to be bound is large and the protruding amount of the needle foot from the back side of the paper is small, the needle foot on the clincher surface above the clincher rotation fulcrum. Hits. In such a state, when the clincher rotates as a movement to start bending the needle foot, a force is applied to lift the needle foot outward.

  In the present embodiment, the length of the needle foot 10b of the staple 10 is 10.0 mm. However, in the operation of binding about 80 sheets of paper having a thickness of about 7.2 mm, the needle foot from the back surface of the paper P is used. The protruding amount of 10b is as small as about 2.8 mm. For this reason, the one needle foot 10b penetrating the paper P hits the clincher surface 20La on the upper side of the shaft 20Lc which is the rotation fulcrum of the clincher 20L. Similarly, the other needle foot 10b penetrating the paper P hits the clincher surface 20Ra above the shaft 20Rc that is the rotation fulcrum of the clincher 20R.

  Therefore, in the present embodiment, as a movement for starting the bending of the needle foot 10b, a force for bending the needle foot 10b inward can be applied by moving the clincher 20L and the clincher 20R closer to each other. Thus, even when the needle foot 10b hits the clincher surfaces 20La and 20Lb above the rotation fulcrum of the clincher 20L and 20R, a force that bends the needle foot 10b inward can be applied to perform a reliable clinching operation.

  After the clinching is completed, when the force pushing the upper handle cover 71 is released, the upper handle unit 11b is pushed up by a return spring (not shown). When the force pushing the clincher holder 21 is released, the clincher holder 21 is pushed up by the return spring 25.

  With the upward movement of the clincher holder 21, the clincher link 22L rotates in a direction in which the upper end side is separated from the clincher link 22R with the shaft 22La as a fulcrum. In addition, the clincher link 22R rotates in a direction in which the upper end side is separated from the clincher link 22L with the shaft 22Ra as a fulcrum by the ascending operation of the clincher holder 21.

  As described above, the clincher link 22L moves with the shaft 20Lc along the guide hole 21L, and the clincher link 22R moves with the shaft 20Lc when the shaft 20Rc moves along the guide hole 21R. The interval between the shafts 20Lc is increased.

  The side surface of the clincher 20L pushed up by the clincher receiver 23 and returned to the substantially horizontal position is pressed by the spring portion 26Lc of the partition plate 26, and the side surface of the clincher 20R is pressed by the spring portion 26Rc of the partition plate 26.

  As a result, the clincher 20L and the clincher 20R that have returned to the substantially horizontal position do not rotate downward due to their own weight, and maintain the substantially horizontal position, as shown in FIGS. 40 (b) to 40 (c). The clincher 20L and the clincher 20R are moved away from each other by the ascending motion of 21. Then, the clincher unit 2A returns to the standby position.

  In a configuration in which the staple foot of the staple is bent by the rotation operation of the pair of left and right clincher, the clincher receives no urging force in the rotation direction, rotates downward by the pressure by the needle foot, and returns by being pushed up by the clincher receiver. For this reason, the clincher may be rotated downward with the cuticle unit in the standby position.

  In such a state, a space is formed inside the clincher holder, which causes a foreign substance to enter. In addition, the appearance may be felt poor.

  On the other hand, in the present embodiment, since the orientation of the clinchers 20L and 20R can be held by the spring portions 26Lc and 26Rc provided on the partition plate 26, the orientations of the clincher 20L and the clincher 20R at substantially horizontal positions. Can be held until the staple 10 is pressed by the needle foot 10b.

  As a result, as shown in FIG. 20 and the like, in the standby state, the opening of the clincher cover 42 is closed with the clinchers 20L and 20R, and the cause of foreign matter entering can be eliminated. In addition, the appearance can be improved.

  FIG. 41 is an exploded perspective view showing a modified example of the clincher unit, and FIG. 42 is an operation explanatory diagram showing an example of the operation of the clincher unit of the modified example. The clincher unit 2B of the modified example moves the clincher in the direction of rotating and separating with a guide by a groove as a clincher driving mechanism.

  The clincher unit 2B includes a pair of clinchers 27L and 27R that bend the needle feet 10b of the staple 10 that has penetrated the paper, and a clincher holder 28 that supports the clincher 27L and the clincher 27R.

  The clincher unit 2B includes a holder guide 29 that guides the movement of the clincher holder 28 in the ascending / descending direction and guides the movement of the clinchers 27L and 27R in the direction of rotation and separation. Further, the clincher unit 2B includes a clincher receiver 29a that pushes up the clinchers 27L and 27R by the lifting and lowering operation of the clincher holder 28.

  The clincher unit 2B is arranged such that the clincher 27L and the clincher 27R are shifted in the left-right direction along the needle crown 10a of the staple 10 and in the front-rear direction orthogonal to the needle crown 10a.

  The clincher 27L is disposed so as to face the one needle foot 10b of the staple 10, and the clincher is inclined in a downward direction toward the clincher 27R disposed on the upper surface facing the needle foot 10b while being shifted in the front-rear direction. A surface 27La is formed. In the clincher 27L, a pressing surface 27Lb to be pressed by the clincher receiver 29a is formed on the lower surface on one end side facing the clincher receiver 29a.

  The clincher 27L is supported by the shaft 27Lc in the guide hole 28La of the clincher holder 28 so as to be rotatable and horizontally movable. The other end portion side of the clincher 27L is supported by the shaft 27Ld so as to be movable along the guide hole 28Lb of the clincher holder 28 and the guide hole 29Lb of the holder guide 29.

  The clincher 27R is disposed to face the other needle foot 10b of the staple 10, and the clincher is inclined in a downward direction toward the clincher 27L disposed on the upper surface facing the needle foot 10b with the position shifted in the front-rear direction. A surface 27Ra is formed. In the clincher 27R, a pressing surface 27Rb to be pressed against the clincher receiver 29a is formed on the lower surface on one end side facing the clincher receiver 29a.

  The clincher 27R is supported by the shaft 27Rc in the guide hole 28Ra of the clincher holder 28 so as to be rotatable and movable in the horizontal direction. The other end of the clincher 27R is supported by the shaft 27Rd so as to be movable along the guide hole 28Rb of the clincher holder 28 and the guide hole 29Rb of the holder guide 29.

  The clincher holder 28 is composed of elongated holes in which the guide hole 28La and the guide hole 28Ra extend in the horizontal direction. In addition, the clincher holder 28 includes guide holes 28 </ b> Lb and guide holes 28 </ b> Rb that are elongated holes that are inclined in a direction in which the distance between the lower end side and the upper end side becomes narrower.

  In the holder guide 29, the guide hole 29Lb and the guide hole 29Rb are long holes inclined in a direction in which the distance between the lower end side and the upper end side becomes narrower. The clincher unit 2B pushes the clincher 27L and the clincher 27R by pushing up the clincher 27L and 27R by the locus of the shafts 27Ld and 27Rd of the clincher 27L and 27R passing through the guide hole 29Lb and the guide hole 29Rb of the holder guide 29, and the clincher 27L. Move in the direction of rotation and separation.

  The operation of the modified clincher unit will be described. As shown in FIG. 42A, when the tip of the needle foot 10b of the staple 10 penetrates the paper P and protrudes from the back surface of the paper P, one needle foot 10b is The clincher 27L comes into contact, and the other needle foot 10b comes into contact with the clincher 27R. At the stage where the tip of the needle foot 10b starts to protrude from the back surface of the paper P, the lowering of the clincher holder 28 is restricted.

  When the staple 10 is further driven and the tip of the needle foot 10b penetrates the paper P, the clincher holder 28 can be lowered. As a result, the clincher holder 28 is lowered by the force pushing the clincher holder 28 through the paper P as shown in FIG.

  With the downward movement of the clincher holder 28, the shaft 27Lc guided by the guide hole 28La of the clincher holder 28 moves in a direction approaching the clincher 27R, and the shaft 27Ld guided by the guide hole 29Lb of the holder guide 29 moves. , Move toward the clincher 27R. Further, when the clincher holder 28 is lowered, the clincher 27R moves in a direction in which the shaft 27Rc guided by the guide hole 28Ra of the clincher holder 28 approaches the clincher 27L and is guided by the guide hole 29Rb of the holder guide 29. 27Rd moves in a direction approaching the clincher 27L.

  As a result, the clincher 27L and 27R move in the direction in which the clincher 27L and the clincher 27R approach each other as the distance between the shaft 27Lc and the shaft 27Rc is reduced by the downward movement of the clincher holder 28.

  Further, when the clincher holder 28 is lowered, the pressing surface 27Lb of the clincher 27L is pressed against the clincher receiver 29a, and the pressing surface 27Rb of the clincher 27R is pressed against the clincher receiver 29a.

  Accordingly, the clincher 27L rotates upward with the shaft 27Lc guided by the guide hole 28La of the clincher holder 28 as a fulcrum, and the clincher 27R moves upward with the shaft 27Rc guided by the guide hole 28Ra of the clincher holder 28 as a fulcrum. Rotate.

  Therefore, the clincher 27L and the clincher 27R move in the direction in which the clincher 27L and the clincher 27R approach the one needle leg 10b of the staple 10 that contacts the clincher 27L and the clincher surface 27La and the other needle foot 10b that contacts the clincher 27R and the clincher surface 27Ra. A force to be bent inside is applied. Then, the clincher 27L and the clincher 27R are turned upward to be bent inward.

  When the clincher holder 28 is lowered to the lowermost position, as shown in FIG. 42 (c), the clincher 27L and the clincher 27R pushed up by the clincher receiver 29a become substantially horizontal positions. Thereby, the needle foot 10b of the staple 10 penetrating the paper P is bent along the surface of the paper P, and the clinch is completed.

  Next, with reference to each figure, the operation | movement which bends by shifting the needle leg 10b which penetrated the paper P back and forth is demonstrated. One needle foot 10b of the staple 10 in contact with the clincher 20L and the clincher surface 20La and the other needle foot 10b in contact with the clincher 20R and the clincher surface 20Ra are moved in a direction in which the clincher 20L and the clincher 20R approach each other, and upward. Each of which is bent inward.

  The clincher unit 2A is disposed to be inclined with respect to the needle crown 10a of the staple 10, and the clincher 20L and the clincher 20R are inclined with respect to the needle crown 10a of the staple 10 as shown in FIG. The position is shifted.

  As a result, by the horizontal movement and rotation of the clincher 20L, 20R, one needle leg 10b of the staple 10 is obliquely guided by the inclination of the clincher surface 20La shown in FIG. 19 in the direction of the arrow NL approaching the clincher 20R side. To be bent. The other needle leg 10b is bent obliquely while being guided in the direction of the arrow NR approaching the clincher 20L side by the inclination of the clincher surface 20Ra.

  One staple leg 10b and the other staple leg 10b of the staple 10 are bent while moving in a direction in which they approach each other, and contact the partition portion 26b of the partition plate 26, respectively.

  Thereby, when the number of sheets P to be bound is small, as shown in FIG. 13C, the two needle legs 10b are bent without overlapping with a gap corresponding to the plate thickness of the partition plate 26.

  In the configuration in which the clincher is provided with a groove to guide the needle foot, the thickness of the convex portion between the groove is required, and the interval between the needle feet cannot be reduced. Further, if there is no partition between the clincher, the needle feet may overlap each other.

  In the present embodiment, the clincher 20L and the clincher 20R are partitioned using the partition plate 26, so that the two needle legs 10b can be folded without being overlapped. Since the partition plate 26 also functions as a spring for maintaining the orientation of the clincher 20L, 20R, the partition plate 26 can be formed of a thin steel plate having high strength with respect to the staple 10.

  Thereby, the clearance gap between the two needle feet 10b can be made the minimum clearance defined by the partition plate 26.

  Next, with reference to each figure, the operation | movement which keeps the direction of clincher unit 2A in the same state in the state which received the press state and the standby state is demonstrated. 21 and 22, the clincher holder 21 is positioned forward with respect to the clincher 20L and 20R, with the rear holder 21b positioned rearward with respect to the clincher 20L and 20R being pushed up by the return spring 25. The front holder 21a is restricted from moving upward by the shafts 22La and 22Ra.

  As a result, the clincher holder 21 to which the clinchers 20L and 20R are attached maintains a forward tilted state indicated by an arrow F1 in a standby state where the clincher holder 21 is pushed up by the return spring 25.

  When the clincher holder 21 is pushed downward through the paper P by the force with which the needle foot 10b of the staple 10 penetrates the paper P, the penetration load F2 is applied to the clincher holder 21. The clincher holder 21 is in a state where the rear holder 21b is placed on the engaging portion 30 of the slider 3, and when the penetrating load F2 is applied, the clincher holder 21 also maintains the forward tilted state indicated by the arrow F1.

  The raising and lowering of the clincher holder 21 is guided by the clincher guide 24a. However, in order to shorten the height direction, if the height of the clincher guide 24a is shortened, the tilt in the front-rear direction is likely to occur.

  If the direction of the clincher changes before and after the penetrating load is applied, the position of the paper shifts and the needle foot moves back and forth while passing through the paper, and the needle foot does not pass through the paper and cannot be bound. There is a case. In the present embodiment, since the orientation of the clincher holder 21 does not change before and after the penetrating load is applied, the deviation of the paper P can be suppressed, and the staple foot of the staple 10 can be reliably penetrated.

  In the present embodiment, since the slider 3 is disposed behind the clincher unit 2A, the pushing force is applied to the rear holder 21b. However, the slider 3 may be disposed in front of the clincher unit. For example, if a pushing force is applied to the front holder, the direction of the clincher holder can be made the same before and after the penetrating load is applied.

  Next, the operation of the lock mechanism 54 of the magazine 50 will be described with reference to the drawings. As shown in FIG. 30A, when the magazine 50 is housed in the magazine guide 51, it is between the rear end side of the staple guide 52 attached to the magazine 50 and the spring pressing portion 54e of the magazine stopper 54a. The magazine lock spring 54c is compressed.

  The magazine stopper 54a is rotated about the shaft 54f in a direction in which the lock claw 54d fits into the lock opening 50e of the magazine 50 when the spring pressing portion 54e is pressed, and the lock claw 54d is moved to the lock opening 50e. Fit. As a result, the magazine 50 is held in the magazine guide 51.

  As shown in FIG. 30B, when the switch portion 54g is pushed, the pusher switch 54b rotates the magazine stopper 54a connected via the shaft 54h around the shaft 54f to lock the magazine stopper 54a. The claw 54d is removed from the lock opening 50e of the magazine 50.

  When the lock claw 54d of the magazine stopper 54a is removed from the lock opening 50e of the magazine 50, the magazine 50 is pressed forward by the force restored by the compressed magazine lock spring 54c, and the magazine 50 is pulled out from the magazine guide 51. .

  When storing the magazine 50, when the magazine 50 is pushed into the magazine guide 51, the staple guide 52 of the magazine 50 presses the spring pressing portion 54e of the magazine stopper 54a via the magazine lock spring 54c. As a result, the magazine stopper 54a rotates about the shaft 54f in the direction in which the lock claw 54d fits into the lock opening 50e of the magazine 50, and the lock claw 54d fits into the lock opening 50e.

  In the configuration in which the magazine is slid, the magazine protrudes by using the force of the pusher spring that presses the staple. Therefore, when the number of stored staples is large, the protruding amount of the magazine increases. However, when the number of staples is small or when the staples are not stored, the protruding amount of the magazine decreases.

  On the other hand, in the present embodiment, the magazine lock spring 54c receives a constant pressing force when the lock mechanism 54 is locked regardless of the remaining number of staples 10 in the magazine 50, and the magazine 50 protrudes. The amount can be made substantially constant.

  In the stapler 1A of the present embodiment provided with the magazine 50 in which the staple 10 of the present embodiment configured with the above-described dimensions is loaded, the staple line No. 10 has the same needle line width and needle line thickness, and the needle Staples and magazines with a crown outer dimension of 11.42 mm and a needle foot length of 6.0 mm can be shared.

  For this reason, in the staple 10 of the present embodiment, it is possible to bind about 2 to 80 sheets, which is the minimum number of sheets, without changing the needle, while the stapler using the staple 10 of the present embodiment. In 1A, the staples can be exchanged and used according to the user's request or the like.

  The present invention is applied to a staple that can increase the number of sheets to be bound by using a staple having a long needle foot.

  1A ... Stapler, 10 ... Staple, 10a ... Needle crown, 10b ... Needle foot, 11a ... Lower handle unit, 11b ... Upper handle unit, 2A, 2B ... Clincher unit 20L, 20R ... clincher, 3 ... slider, 4 ... lower handle frame, 5 ... magazine unit, 50 ... magazine, 6 ... driver unit, 60 ... driver, 7 ... Handle unit

Claims (5)

A needle crown, and two needle legs configured to be bent in one direction from both ends of the needle crown;
The outer width dimension of the needle crown is configured to be 11.35 mm or more and 11.49 mm or less,
The needle line width is configured to be larger than 0.50 mm and smaller than 0.70 mm.
The needle wire thickness is configured to be larger than 0.32 mm and smaller than 0.49 mm,
The staple is characterized in that the length of the needle foot is equal to or less than the length of the outer width of the needle crown. The staple according to claim 1, wherein the reference dimension of the needle line width is 0.51 mm, and the reference dimension of the needle line thickness is 0.37 mm. The staple according to claim 1 or 2, wherein a reference dimension of the outer width dimension of the needle crown is 11.42 mm, and a reference dimension of the length of the needle foot is 10.0 mm. A magazine unit including a needle crown and a magazine loaded with staples that are folded in one direction from both ends of the needle crown and are configured with two needle legs;
A driver unit having a driver for driving out the staple stored in the magazine;
A clincher unit that is punched out by the driver unit and folds the staple foot of the staple penetrating the paper;
The staple loaded in the magazine is
The outer width dimension of the needle crown is configured to be 11.35 mm or more and 11.49 mm or less,
The needle line width is configured to be larger than 0.50 mm and smaller than 0.70 mm.
The needle wire thickness is configured to be larger than 0.32 mm and smaller than 0.49 mm,
A stapler, wherein a length of the needle foot is equal to or less than a length equal to an outer width dimension of the needle crown. The clincher unit is
A pair of clinchers that respectively bend the two needle feet of the staple;
A clincher drive mechanism for moving the pair of clincher in a direction to rotate and separate;
The clincher is such that the tip of the staple foot of the staple that has passed through the maximum number of sheets to be bound hits above the rotation fulcrum by the clincher driving mechanism,
5. The stapler according to claim 4, wherein the clincher driving mechanism moves the pair of clinchers closer to each other as a movement for starting the folding of the staple foot of the staple that has penetrated the sheet.

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