Stapler

Abstract

To provide a stapler in which forces applied to a pair of needle feet are equalized by suppressing inclination of a driver.SOLUTION: A stapler 1A comprises: a driver 2A for driving a needle 10 comprising a needle crown 10a, a first needle foot 10b and a second needle foot 10c into a paper sheet; a driver shaft 3A for moving in a driving direction of the needle 10; and a driver attaching part 4A for supporting the driver 2A to the driver shaft 3A while allowing rotation in an axial direction of the needle crown 10A in a state where the needle 10 is set at a driving position.SELECTED DRAWING: Figure 2A

Description

[Technical field]

[0001] The present invention relates to a stapler that staples papers together. [Background technology]

[0002] A stapler has been proposed in which a driver that drives out staples is supported by a drive shaft (see, for example, Patent Document 1). In such a stapler, both the left and right sides of the driver are supported by the drive shaft.

[0003] Also, a technique has been proposed in which the center of the driver is pressed via a T-bolt to make the vertical position of the driver adjustable (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4513443 [Patent Document 2] Patent No. 3346194 Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional staplers, when the drive shaft (pin) is tilted due to bending or the like, the driver is tilted accordingly. When the driver is tilted, a difference occurs between the force applied to one staple leg and the force applied to the other staple leg when the driver presses the staple. This can cause the staple to buckle due to the uneven force applied to the pair of staple legs.

[0006] Therefore, a stapler is provided that suppresses the inclination of the driver and uniformly applies force to a pair of staple legs. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention provides a stapler comprising a driver that drives a needle consisting of a crown portion and a pair of legs into paper, a clincher that bends the legs that have been driven into the paper and penetrated it, and a support portion that supports the driver so that it can move in the needle driving direction, and the support portion supports the driver so that it can rotate along the axial direction of the crown portion when the needle is set in the driving position.

[0008] In the present invention, the driver and the support rotate relatively along the axial direction of the crown when the needle is set to the driving position, thereby preventing the driver from tilting with respect to the axial direction of the crown when the needle is set to the driving position. Effect of the Invention

[0009] In the present invention, when the driver drives the needle, a substantially equal force is applied to the first and second legs of the needle, which makes it possible to prevent the needle from buckling due to the uneven force being applied to the first and second legs. [Brief description of the drawings]

[0010] [Figure 1A] FIG. 1 is a perspective view showing an example of a binding device according to an embodiment of the present invention. [Figure 1B] 1 is a front cross-sectional view showing an example of a binding device according to an embodiment of the present invention; [Figure 2A] 1 is a front cross-sectional view showing an example of a stapler according to an embodiment of the present invention. [Figure 2B] FIG. 2 is a side view showing an example of a stapler according to the present embodiment. [Figure 2C] FIG. 1 is a front view showing an example of a stapler according to an embodiment of the present invention. [Diagram 3] 10A to 10C are front sectional views showing an example of an operation of the stapler according to the present embodiment. [Figure 4A] 10A to 10C are front sectional views showing an example of an operation of the stapler according to the present embodiment. [Figure 4B] 10A to 10C are front sectional views showing an example of an operation of the stapler according to the present embodiment. [Figure 5A] FIG. 13 is a perspective view showing a modified example of the stapler of the present embodiment. [Figure 5B] FIG. 13 is a perspective view of a driver illustrating a modified example of the stapler of the present embodiment. [Figure 6A] FIG. 11 is a perspective view showing another modified example of the stapler of the present embodiment. [Figure 6B] FIG. 11 is a perspective view of a driver illustrating another modified example of the stapler of the present embodiment. [Figure 7A] FIG. 11 is a perspective view showing another modified example of the stapler of the present embodiment. [Figure 7B] FIG. 11 is a perspective view of a driver illustrating another modified example of the stapler of the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a stapler and a binding device including a stapler according to the present invention will be described with reference to the drawings.

[0012] <Example of the configuration of the stapler according to the present embodiment> Fig. 1A is a perspective view showing an example of a binding device of the present embodiment, and Fig. 1B is a front cross-sectional view showing an example of the binding device of the present embodiment. Fig. 2A is a front cross-sectional view showing an example of a stapler of the present embodiment, Fig. 2B is a side view showing an example of the stapler of the present embodiment, and Fig. 2C is a front view showing an example of the stapler of the present embodiment. Fig. 2A is a cross-sectional view taken along line AA in Fig. 2B.

[0013] The binding device 100A includes at least one stapler 1A and a drive unit 6 that drives the stapler 1A. In the example of Fig. 1A and Fig. 1B, two staplers 1A1 and 1A2 are driven by a single drive unit 6. Note that a binding device including the stapler 1A and the drive unit 6 may be referred to as a stapler.

[0014] The stapler 1A includes a driver 2A that drives the staple 10 and drives a pair of legs into the paper P, a driver shaft 3A that moves the driver 2A, and a driver attachment section 4A that rotatably supports the driver 2A and connects the driver 2A to the driver shaft 3A. The stapler 1A also includes a bending section 7 that bends the pair of legs of the staple 10 that has been driven into and pierced the paper P.

[0015] The needle 10 has a first needle foot 10b, which is one of a pair of legs bent in the driving direction of the needle 10 as indicated by the arrow A1, formed at one end of the needle crown 10a, which is the crown portion. The needle 10 also has a second needle foot 10c, which is the other of a pair of legs bent in the driving direction of the needle 10, formed at the other end of the needle crown 10a. The extension direction of the needle crown 10a is referred to as the axial direction.

[0016] The driver 2A is supported so as to be movable in the driving direction of the needle 10 and in the direction opposite to the driving direction of the needle 10. The driver 2A is rectangular plate-shaped, and the driving direction of the needle 10 is the longitudinal direction. The driver 2A is provided with a pressing part 20A that presses the needle crown 10a of the needle 10 at an end along the driving direction of the needle 10. The pressing part 20A is formed by a short side of the driver 2A and extends in the axial direction of the needle crown 10a. The length of the pressing part 20A in the extension direction (width in the left-right direction) of the driver 2A is approximately the same as the axial length of the needle crown 10a.

[0017] The driver shaft 3A is an example of a support part, and extends along the axial direction of the needle crown 10a when the needle 10 is set at the driving position. The axial direction of the needle crown 10a when the needle 10 is set at the driving position is indicated by arrow B. The driver shaft 3A extending along the axial direction of the needle crown 10a includes not only the case where the driver shaft 3A extends parallel to the axial direction of the needle crown 10a, but also the case where the driver shaft 3A extends at an angle to the axial direction of the needle crown 10a. The same applies to the driver shaft of the modified example described later. The driver shaft 3A is driven by a drive part 6 composed of a motor, gears, etc., and moves in the driving direction of the needle 10 and in the opposite direction.

[0018] The driver attachment part 4A is an example of a support part, and includes an action part 40A that receives a force to move the needle 10 in the driving direction and a force to move the needle 10 in the opposite direction. The action parts 40A are provided at two positions with a predetermined interval along the left-right direction intersecting the driving direction of the needle 10 and the opposite direction. The pair of action parts 40A are provided with an interval wider than the width of the driver 2A along the axial direction of the needle crown 10a. The action part 40A is formed of a hole into which the driver shaft 3A is inserted. When the action part 40A is a rectangular hole, the length of the first side and the second side perpendicular to the first side are approximately the same as the diameter of the driver shaft 3A. When the action part 40A is a circular hole, the diameter is approximately the same as the diameter of the driver shaft 3A.

[0019] The driver attachment portion 4A includes a support shaft 41A that rotatably supports the driver 2A. The support shaft 41A is provided on the side of the action portion 40A along the opposite direction to the driving direction of the needle 10. The support shaft 41A is cylindrical, and the axial direction of the cylinder is perpendicular to the driver shaft 3A. In the driver attachment portion 4A, the center of the pair of action portions 40A and the center of the support shaft 41A are aligned. That is, the distance L1 from one action portion 40A to the center O of the support shaft 41A and the distance L2 from the other action portion 40A to the center O of the support shaft 41A are configured to be equal. The distance L1 from one action portion 40A to the center O of the support shaft 41A and the distance L2 from the other action portion 40A to the center O of the support shaft 41A are distances along the extension direction of the driver shaft 3A inserted in the action portion 40A. As a result, the support shaft 41A is provided at the center of the interval between the pair of action portions 40A.

[0020] The driver 2A is supported by the driver attachment part 4A by the support shaft 41A at its end along the opposite direction to the driving direction of the needle 10. The driver 2A is configured such that the distance L10 from one end of the pressing part 20A to the center O of the support shaft 41A is equal to the distance L20 from the other end of the pressing part 20A to the center O of the support shaft 41A. The distance L10 from one end of the pressing part 20A to the center O of the support shaft 41A and the distance L20 from the other end of the pressing part 20A to the center O of the support shaft 41A are distances along the extension direction of the pressing part 20A. As a result, the center of the driver 2A along the axial direction of the needle crown 10a when the needle 10 is set at the driving position is supported by the support shaft 41A. The driver 2A and the driver attachment part 4A rotate relatively along the axial direction of the needle crown 10a when the needle 10 is set at the driving position, with the support shaft 41A as a fulcrum.

[0021] The stapler 1A includes a guide portion 5A that guides the driver 2A, which moves in the driving direction and the opposite direction of the staple 10, along the driving direction and the opposite direction of the staple 10. The guide portions 5A face each other with a width equal to the length in the extension direction (width in the left-right direction) of the pressing portion 20A of the driver 2A, and extend along the driving direction of the staple 10 and the opposite direction.

[0022] This prevents the driver 2A, which is guided by the guide portion 5A and moves in the driving direction and the opposite direction of the needle 10, from tilting with respect to the driving direction and the opposite direction of the needle 10. Therefore, the driver 2A prevents the pressing portion 20A from tilting with respect to the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0023] In the binding device 100A, one driver shaft 3A is passed through a pair of action portions 40A of the driver attachment portion 4A of the stapler 1A1 and a pair of action portions 40A of the driver attachment portion 4A of the stapler 1A2. As a result, in the binding device 100A, the two staplers 1A1 and 1A2 are connected by one driver shaft 3A driven by a single drive unit 6. In addition, a clincher (not shown) of the bending portion 7 is driven by the drive unit 6 via a transmission member 70.

[0024] <Example of operation of the stapler according to the present embodiment> 3, 4A, and 4B are front cross-sectional views showing an example of the operation of the stapler of this embodiment. FIG. 1A shows a state in which the driver shaft 3A is parallel to the axial direction of the needle crown 10a when the needle 10 is set to the driving position and is not tilted, and the driver 2A is in the standby position. FIG. 3 shows a state in which the driver shaft 3A is parallel to the axial direction of the needle crown 10a when the needle 10 is set to the driving position and is not tilted, and the driver 2A has moved from the standby position in the driving direction of the needle 10. FIG. 4A shows a state in which the driver shaft 3A is tilted to the axial direction of the needle crown 10a when the needle 10 is set to the driving position and the driver 2A is in the standby position. FIG. 4B shows a state in which the driver shaft 3A is tilted to the axial direction of the needle crown 10a when the needle 10 is set to the driving position and the driver 2A has moved from the standby position in the driving direction of the needle 10.

[0025] In stapler 1A, when driver shaft 3A is driven by drive unit 6 to move in the direction indicated by arrow A1 for driving staple 10, action portion 40A of driver attachment portion 4A is pushed in the direction for driving staple 10 by driver shaft 3A.

[0026] The driver 2A is connected to the driver attachment part 4A by a support shaft 41A. As a result, the driver 2A is pushed in the driving direction of the needle 10 via the support shaft 41A of the driver attachment part 4A, and moves from the standby position to the shooting position. When the driver 2A moves from the standby position shown in Figures 1A and 4A in the driving direction of the needle 10 as shown in Figures 3 and 4B, it is guided by the guide part 5A.

[0027] This prevents the pressing part 20A of the driver 2A from tilting with respect to the axial direction of the needle crown 10a when the needle 10 is set at the driving position, as indicated by the arrow B perpendicular to the driving direction of the needle 10. When the driver 2A moves from the standby position to the shooting position, the pressing part 20A presses the needle crown 10a of the needle 10, thereby shooting the needle 10.

[0028] The driver 2A and the driver attachment part 4A rotate relatively around the support shaft 41A along the axial direction of the needle crown 10a when the needle 10 is set at the driving position. In addition, the driver 2A, which is guided by the guide part 5A and moves in the driving direction of the needle 10, is prevented from tilting the pressing part 20A with respect to the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0029] As shown in Figures 1A and 3, when the driver shaft 3A is not inclined with respect to the axial direction of the needle crown 10a when the needle 10 is set in the driving position, the extension direction of the driver shaft 3A is parallel to the extension direction of the pressing portion 20A of the driver 2A guided by the guide portion 5A.

[0030] As shown in Figures 4A and 4B, when the driver shaft 3A is inclined with respect to the axial direction of the needle crown 10a when the needle 10 is set at the driving position due to deformation or the like, the driver 2A and the driver attachment part 4A rotate relatively with the support shaft 41A as a fulcrum along the axial direction of the needle crown 10a when the needle 10 is set at the driving position. As a result, even when the driver shaft 3A is inclined with respect to the axial direction of the needle crown 10a when the needle 10 is set at the driving position, the driver 2A is prevented from inclining the pressing part 20A with respect to the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0031] Therefore, whether the driver shaft 3A is not tilted with respect to the axial direction of the needle crown 10a when the needle 10 is set in the driving position or is tilted, the driver 2A prevents the pressing portion 20A from tilting with respect to the axial direction of the needle crown 10a when the needle 10 is set in the driving position.

[0032] The support shaft 41A is provided at the center of the gap between the pair of action parts 40A. Furthermore, the driver 2A is supported by the support shaft 41A at the center along the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0033] As a result, the force exerted by the driver shaft 3A on the pair of operating portions 40A of the driver mounting portion 4A in the driving direction of the needle 10 is applied to the center of the driver 2A along the axial direction of the needle crown 10a when the needle 10 is set in the driving position.

[0034] Therefore, whether the driver shaft 3A is not tilted with respect to the axial direction of the needle crown 10a when the needle 10 is set in the driving position or is tilted, when the pressing portion 20A of the driver 2A presses the needle crown 10a of the needle 10, the force applied from the pressing portion 20A to one end side and the other end side of the needle crown 10a is approximately equal.

[0035] Therefore, when the driver 2A drives out the needle 10, a substantially equal force is applied to the first needle foot 10b and the second needle foot 10c. This prevents the needle 10 from buckling due to the uneven force applied to the first needle foot 10b and the second needle foot 10c.

[0036] 1A and 1B, the stapler 1A1 and the stapler 1A2 are connected by one driver shaft 3A. This requires only a transmission mechanism 60 such as a gear or a link that transmits a driving force from the drive unit 6 to the single driver shaft 3A. This allows a reduction in the number of parts and a reduction in costs compared to a configuration that includes a transmission mechanism 60 that transmits a driving force from the drive unit 6 to each driver shaft 3A of each stapler.

[0037] On the other hand, in the binding device 100A, a driver shaft that passes through a pair of action portions 40A of the driver mounting portion 4A of the stapler 1A1 and a driver shaft that passes through a pair of action portions 40A of the driver mounting portion 4A of the stapler 1A2 are connected between the stapler 1A1 and the stapler 1A2 to form a single driver shaft 3A. Therefore, the driver shaft 3A is longer than the stapler 1A shown in FIG. 2A etc. by the amount of connection between the stapler 1A1 and the stapler 1A2. When the driver shaft 3A is longer, it becomes easier to deform, such as bending.

[0038] However, even if the driver shaft 3A is inclined with respect to the axial direction of the needle crown 10a when the needle 10 is set at the driving position, the driver 2A is prevented from inclining the pressing portion 20A with respect to the axial direction of the needle crown 10a when the needle 10 is set at the driving position. Also, the force of the pair of action portions 40A of the driver attachment portion 4A being pressed in the driving direction of the needle 10 by the driver shaft 3A is applied to the center of the driver 2A along the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0039] Therefore, even if the driver shaft 3A is deformed such as bent, and the needle 10 is tilted with respect to the axial direction of the needle crown 10a when the needle 10 is set in the driving position, the force is applied approximately evenly to the first needle foot 10b and the second needle foot 10c when the driver 2A drives out the needle 10. This allows the driver shaft 3A to deform, while suppressing the occurrence of buckling of the needle 10 caused by the uneven force applied to the first needle foot 10b and the second needle foot 10c.

[0040] <Modifications of the Stapler of the Present Embodiment> FIG. 5A is a perspective view showing a modified example of the stapler of the present embodiment, and FIG. 5B is a perspective view of a driver showing the modified example of the stapler of the present embodiment.

[0041] The modified stapler 1B includes a driver 2B that drives out the needle 10, and a driver shaft 3B that moves the driver 2B in the driving direction of the needle 10 and in the opposite direction, and supports the driver 2B rotatably along the axial direction of the needle crown 10a when the needle 10 is set in the driving position.

[0042] The driver 2B is supported so as to be movable in the driving direction of the needle 10 indicated by the arrow A1 and in the opposite direction. The driver 2B is a rectangular plate, and the driving direction of the needle 10 and the opposite direction are the longitudinal directions. The driver 2B has a pressing part 20B that presses the needle crown 10a of the needle 10 at an end along the driving direction of the needle 10. The driver 2B has an action part 22B that is supported by the driver shaft 3B at an end along the opposite direction to the driving direction of the needle 10 and receives a force to move the needle 10 in the driving direction and a force to move the needle in the opposite direction. The action part 22B is composed of a hole in which the driver shaft 3B enters and a gap is formed between the driver shaft 3B and the action part 22B that allows the driver shaft 3B to rotate relative to the driver 2B along the axial direction of the needle crown 10a when the needle 10 is set at the driving position. The action portion 22B is provided in the driver 2B at the center along the axial direction of the needle crown 10a in a state in which the needle 10 is set at the driving position, which is the extension direction of the pressing portion 20B.

[0043] The driver shaft 3B is an example of a support part, and extends along the axial direction of the needle crown 10a when the needle 10 is set at the driving position indicated by the arrow B. The driver shaft 3B is driven by a driving part (not shown) composed of a motor, gears, etc., and moves in the driving direction of the needle 10 and in the opposite direction.

[0044] As a result, the center of the driver 2B along the axial direction of the needle crown 10a when the needle 10 is set at the driving position, which is the extension direction of the pressing part 20B, is supported by the driver shaft 3B via the acting part 22B. The driver 2B and the driver shaft 3B rotate relatively with the acting part 22B as a fulcrum along the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0045] The stapler 1B includes a guide portion (not shown) that guides a driver 2B that moves in the direction in which the staples 10 are driven and in the opposite direction along the direction in which the staples 10 are driven and in the opposite direction.

[0046] The stapler 1B is configured without a guide section, and the driver 2B and the driver shaft 3B rotate relatively around the action section 22B along the axial direction of the needle crown 10a when the needle 10 is set at the driving position. As a result, the driver 2B, which is guided by a guide section (not shown) and moves in the driving direction of the needle 10, is prevented from tilting the pressing section 20B with respect to the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0047] Furthermore, the force with which the operating portion 22B of the driver 2B is pushed in the driving direction of the needle 10 by the driver shaft 3B is applied to the center of the driver 2B along the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0048] Therefore, whether the driver shaft 3B is not tilted with respect to the axial direction of the needle crown 10a when the needle 10 is set in the driving position or is tilted, when the pressing portion 20B of the driver 2B presses the needle crown 10a of the needle 10, the force applied from the pressing portion 20B to one end side and the other end side of the needle crown 10a is approximately equal.

[0049] Therefore, when the driver 2B drives out the staple 10, a substantially equal force is applied to the first staple leg 10b and the second staple leg 10c. As a result, the stapler 1B does not have a driver attachment portion as a support portion, and the occurrence of buckling of the staple 10 caused by the unequal force applied to the first staple leg 10b and the second staple leg 10c is suppressed.

[0050] FIG. 6A is a perspective view showing another modified example of the stapler of the present embodiment, and FIG. 6B is a perspective view of a driver showing another modified example of the stapler of the present embodiment.

[0051] Another modified stapler 1C includes a driver 2C for driving out the needle 10, and a driver shaft 3C for moving the driver 2C in the driving direction of the needle 10 and in the opposite direction, and for supporting the driver 2C rotatably along the axial direction of the needle crown 10a when the needle 10 is set in the driving position.

[0052] The driver 2C is supported so as to be movable in the driving direction of the needle 10 indicated by the arrow A1 and in the opposite direction. The driver 2C is a rectangular plate, and the driving direction of the needle 10 and the opposite direction are the longitudinal directions. The driver 2C is provided with a pressing part 20C that presses the needle crown 10a of the needle 10 at an end along the driving direction of the needle 10. The driver 2C is provided with an action part 22C that is supported by the driver shaft 3C at an end along the opposite direction to the driving direction of the needle 10 and receives a force that moves the needle 10 in the driving direction and a force that moves the needle 10 in the opposite direction. The action part 22C is configured by providing a protrusion on the driver 2C. The action part 22C is provided in the driver 2C at the center along the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0053] The driver shaft 3C is an example of a support portion, and extends along the axial direction of the needle crown 10a when the needle 10 is set in the driving position. The driver shaft 3C is driven by a drive portion (not shown) that is composed of a motor, gears, etc., and moves in the driving direction of the needle 10 and in the opposite direction.

[0054] The driver shaft 3C is plate-shaped and has an acted-on portion 32C into which the acting portion 22C of the driver 2C is inserted. The acted-on portion 32C is formed with a hole between the acting portion 22C and the hole, which forms a gap that allows the driver shaft 3C to rotate relative to the driver 2C along the axial direction of the needle crown 10a when the needle 10 is set to the driving position.

[0055] As a result, the center of the driver 2C along the axial direction of the needle crown 10a when the needle 10 is set at the driving position is supported by the actuated part 32C of the driver shaft 3C via the acting part 22C. The driver 2C and the driver shaft 3C rotate relatively around the acting part 22C along the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0056] The stapler 1C includes a guide portion (not shown) that guides a driver 2C that moves in the direction in which the staples 10 are driven and in the opposite direction along the direction in which the staples 10 are driven and in the opposite direction.

[0057] The stapler 1C does not have a guide section, and the driver 2C and the driver shaft 3C rotate relatively around the action section 22C along the axial direction of the needle crown 10a when the needle 10 is set at the driving position. As a result, the driver 2C, which is guided by the guide section (not shown) and moves in the driving direction of the needle 10, is prevented from tilting the pressing section 20C with respect to the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0058] In addition, the force with which the acting portion 22C of the driver 2C is pushed in the driving direction of the needle 10 by the acted upon portion 32C of the driver shaft 3C is applied to the center of the driver 2C along the axial direction of the needle crown 10a when the needle 10 is set in the driving position.

[0059] Therefore, whether the driver shaft 3C is not tilted with respect to the axial direction of the needle crown 10a when the needle 10 is set in the driving position or is tilted, when the pressing portion 20C of the driver 2C presses the needle crown 10a of the needle 10, the force applied from the pressing portion 20C to one end side and the other end side of the needle crown 10a is approximately equal.

[0060] Therefore, when the driver 2C drives out the staple 10, a substantially equal force is applied to the first staple leg 10b and the second staple leg 10c. As a result, the stapler 1C does not have a driver attachment portion as a support portion, and the occurrence of buckling of the staple 10 caused by the unequal force applied to the first staple leg 10b and the second staple leg 10c is suppressed.

[0061] FIG. 7A is a perspective view showing another modified example of the stapler of the present embodiment, and FIG. 7B is a perspective view of a driver showing another modified example of the stapler of the present embodiment.

[0062] Another modified stapler 1D includes a driver 2D that drives out the needle 10, and a driver shaft 3D that moves the driver 2D in the driving direction of the needle 10 and in the opposite direction, and supports the driver 2D rotatably along the axial direction of the needle crown 10a when the needle 10 is set in the driving position.

[0063] The driver 2D is supported so as to be movable in the driving direction of the needle 10 and in the opposite direction. The driver 2D is a rectangular plate, and the driving direction of the needle 10 and the opposite direction are the longitudinal directions. The driver 2D is provided with a pressing part 20D that presses the needle crown 10a of the needle 10 at an end along the driving direction of the needle 10. The driver 2D is provided with an action part 22D that is supported by the driver shaft 3D at an end along the opposite direction to the driving direction of the needle 10 and receives a force to move the needle 10 in the driving direction and a force to move the needle 10 in the opposite direction. The action part 22D is configured by providing a hole that penetrates the front and back of the driver 2D. The action part 22D is provided in the driver 2D at a position that includes the center along the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0064] The driver shaft 3D is an example of a support portion, and extends along the axial direction of the needle crown 10a when the needle 10 is set at the driving position. The driver shaft 3D is driven by a drive portion (not shown) that is composed of a motor, gears, etc., and moves in the driving direction of the needle 10 and in the opposite direction.

[0065] The driver shaft 3D is plate-shaped and has an acted upon portion 32D that fits into the acting portion 22D of the driver 2D. The acted upon portion 32D is formed of a cylindrical protrusion that forms a gap between the acting portion 22D and the driver shaft 3D, allowing the driver 2D to rotate along the axial direction of the needle crown 10a when the needle 10 is set to the driving position.

[0066] As a result, the center of the driver 2D along the axial direction of the needle crown 10a when the needle 10 is set at the driving position is supported by the acted-on part 32D of the driver shaft 3D via the acting part 22D. The driver 2D and the driver shaft 3D rotate relatively around the acted-on part 32D along the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0067] The stapler 1D includes a guide portion (not shown) that guides a driver 2D that moves in the direction in which the staples 10 are driven and in the opposite direction along the direction in which the staples 10 are driven and the opposite direction.

[0068] The stapler 1D is configured without a guide section, and the driver 2D and the driver shaft 3D rotate relatively around the actuated section 32D along the axial direction of the needle crown 10a when the needle 10 is set at the driving position. As a result, the driver 2D, which is guided by a guide section (not shown) and moves in the driving direction of the needle 10, is prevented from tilting the pressing section 20D with respect to the axial direction of the needle crown 10a when the needle 10 is set at the driving position.

[0069] In addition, the force with which the acting portion 22D of the driver 2D is pushed in the driving direction of the needle 10 by the acted upon portion 32D of the driver shaft 3D is applied to the center of the driver 2D along the axial direction of the needle crown 10a when the needle 10 is set in the driving position.

[0070] Therefore, whether the driver shaft 3D is not tilted with respect to the axial direction of the needle crown 10a when the needle 10 is set in the driving position or is tilted, when the pressing portion 20D of the driver 2D presses the needle crown 10a of the needle 10, the force applied from the pressing portion 20D to one end side and the other end side of the needle crown 10a is approximately equal.

[0071] Therefore, when the driver 2D drives out the staple 10, a substantially equal force is applied to the first staple leg 10b and the second staple leg 10c. As a result, the stapler 1D does not have a driver attachment portion as a support portion, and buckling of the staple 10 caused by the unequal force applied to the first staple leg 10b and the second staple leg 10c is suppressed. [Explanation of symbols]

[0072] 1A, 1A1, 1A2, 1B, 1C, 1D... stapler, 2A, 2B, 2C, 2D... driver, 20A, 20B, 20C, 20D... pressing portion, 22B, 22C, 22D... acting portion, 3A, 3B, 3C, 3D... driver shaft (support portion), 32C, 32D... acted upon portion, 4A... driver mounting portion (support portion), 40A... acting portion, 41A... support shaft, 5A... guide portion, 10... needle, 10a... needle crown, 100A... binding device

Claims

1. a driver for driving a staple, which is composed of a crown portion and a pair of legs, into paper; a clincher that is driven into the paper and bends the leg that penetrates the paper; a support portion that supports the driver so as to be movable in the needle driving direction; A stapler comprising: The support portion is The driver is supported so as to be rotatable along the axial direction of the crown portion when the needle is set at the driving position. Stapler.

2. A guide portion is provided for guiding the driver in a driving direction when the driver drives the staple into the paper.

2. The stapler of claim 1.

3. The support portion rotatably supports a center position of the driver in the axial direction.

3. A stapler according to claim 1 or 2.

4. The support portion is a driver attachment portion that rotatably supports the driver; a driver shaft extending along the axial direction and configured to move the driver attachment portion in the driving direction; 4. The stapler of claim 3.

5. The support portion is a driver shaft extending in the axial direction, rotatably supporting the driver at a portion in the axial direction, and moving the driver in the driving direction; 4. The stapler of claim 3.

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