Stapler

Abstract

The invention provides a stapler, which can drive the punching of a needle and the bending of a stitch through a single driving part, and can perform stapling at the position of a fold of a booklet. A stapler (1A) is provided with: a punching unit (2) for punching staples; a bending part (3) which faces the punching part (2) across the paper area (10) and bends the stitch of the needle punched by the punching part (2); and a drive unit (5) that drives the striking unit (2) and the bending unit (3), the drive unit (5) being provided with: a motor (51) provided to the striking unit (2); and a first link (54) for transmitting the driving force of the motor (51) between the striking section (2) and the bending section (3), the first link (54) being provided on the outside of the paper region (10) on one side in a direction orthogonal to the paper feeding direction of the paper (P) passing through the paper region (10).

Description

Technical Field

[0001] The present invention relates to a stapler for binding a bundle of paper sheets by using a needle. Background Art

[0002] In a conventionally known general stapler bending device, a fixed bending portion having guide grooves for guiding a pair of staple pins to bend inwardly is arranged on the back side of the bound paper, and a driving portion is used to engage the staple pins punched from the surface side of the bound paper toward the bound paper, wherein the staple pins protruding toward the lower surface side of the bound paper are engaged with the guide grooves, thereby guiding the staple pins to bend inwardly.

[0003] In the above-described stapling by fixed clinching, the height dimension of the loop shape formed at the base of both legs of the staple is larger than the thickness of the bound paper sheets, and the thickness of the stapled portion increases.

[0004] Therefore, an electric stapler including a movable clincher that engages with staple legs that penetrate bound sheets and protrude toward the lower surface of the bound sheets and operates to bend the staple legs from the base side has been proposed (for example, see Patent Document 1).

[0005] In addition, as an electric stapler for saddle stitching that staples the center of a bundle of paper sheets, the following electric stapler has been proposed: a driving unit having a driving tool for driving out staples and a bending unit having a bending portion for bending the driven staples are separated from each other in the upper and lower parts, and the driving unit and the bending unit are respectively provided with a motor (for example, refer to Patent Document 2). Prior art literature

[0006] Patent Literature Patent document 1: Japanese Patent No. 3526682. Patent document 2: Japanese Patent No. 5310381. Summary of the invention Problems to be solved by the invention

[0007] In a saddle stitch stapler used for booklet binding, it is preferred to perform flat clinching in a manner that the stitch does not protrude from the fold of the booklet's folio. In order to achieve flat clinching, a movable clincher is generally used to bend the stitch from the root. However, in a stapler using a movable clincher, not only a motor for actuating the driver but also a motor for actuating the movable clincher is required.

[0008] In a general electric stapler that is not used for saddle stitching but for corner binding, since the paper feeding area of ​​the paper is small, the clincher and the punch can be arranged close to each other. Therefore, as described in Patent Document 1, it is relatively easy to realize a structure in which the punch and the punch are driven by one motor. In contrast, in a saddle stitching stapler, since a large paper feeding area must be ensured, the punch and the punch have to be arranged separately and at intervals. Therefore, it is structurally difficult to drive both the punch and the punch with one motor. Therefore, in the saddle stitching stapler so far, as described in Patent Document 2, a motor for the punch and a motor for the punch are separately provided.

[0009] However, since the motors are provided separately, the size of the device increases and the number of parts increases, which also becomes a factor of the cost increase.

[0010] Therefore, a stapler is provided which can operate both the driver and the clincher with one motor (i.e., can realize flat clincher), thereby suppressing the enlargement of the device, the increase in the number of components, and the associated cost increase. Means for solving problems

[0011] In order to solve the above-mentioned problems, the present invention provides a stapler for binding papers using needles, the stapler comprising: a punching section, which is arranged at a position perpendicular to the paper surface of the paper during the binding process, and punches needles into the paper; a bending section, which is arranged at a position opposite to the punching section across the paper during the binding process, and bends the pins of the needles punched by the punching section and penetrating the paper; a single motor, which drives the punching section and the bending section; a connecting section, which connects the punching section and the bending section on a side perpendicular to the paper feeding direction of the paper passing between the punching section and the bending section before and after the binding process and along the direction of the paper surface; and a transmission section, which transmits the driving force of the motor to the punching section and / or the bending section via the connecting section.

[0012] In the present invention, between the punching portion and the bending portion, the upstream side and the downstream side are opened with respect to the paper feeding direction of the paper, so that the paper can pass through. Effects of the Invention

[0013] In the present invention, the ejection portion and the bending portion of the stapler are driven by a single motor, and the folded portion of the booklet can be bound by needles, thereby reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A It is a front view showing an example of the stapler according to the present embodiment.

[0015] Figure 1B It is a main part perspective view which shows an example of the stapler of this embodiment.

[0016] Figure 1C It is an external perspective view showing an example of the stapler according to the present embodiment.

[0017] Figure 2A It is a main part front cross-sectional view showing an example of the bending portion of the stapler according to the present embodiment.

[0018] Figure 2B It is a main part front cross-sectional view showing an example of the bending portion of the stapler according to the present embodiment.

[0019] Figure 3A It is a front cross-sectional view showing an example of a bending portion of the stapler according to the present embodiment.

[0020] Figure 3B It is a front cross-sectional view showing an example of a bending portion of the stapler according to the present embodiment.

[0021] Figure 4 It is a main part perspective view showing an example of the driving unit of the stapler according to the embodiment.

[0022] Figure 5A It is a perspective view of main parts showing a modified example of the stapler according to the present embodiment.

[0023] Figure 5B It is a perspective view of main parts showing a modified example of the stapler according to the present embodiment.

[0024] Fig. 6A It is a perspective view of main parts showing another modified example of the stapler of the present embodiment.

[0025] Figure 6B It is a perspective view of main parts showing another modified example of the stapler of the present embodiment.

[0026] Fig. 7A It is a perspective view of main parts showing another modified example of the stapler of the present embodiment.

[0027] Figure 7B It is a perspective view of main parts showing another modified example of the stapler of the present embodiment.

[0028] Fig. 8A It is a front view showing a modified example of the stapler according to the present embodiment.

[0029] Figure 8B It is a front view showing a modified example of the stapler according to the present embodiment.

[0030] Figure 8C It is a front view showing a modified example of the stapler according to the present embodiment.

[0031] Fig.8D It is a front view showing a modified example of the stapler according to the present embodiment. DETAILED DESCRIPTION

[0032] Hereinafter, an example of an embodiment of the stapler of the present invention will be described with reference to the drawings.

[0033] <Configuration Example of Stapler of the Present Embodiment> Figure 1A 1 is a front view showing an example of a stapler according to the present embodiment, Figure 1B 1 is a perspective view showing a main part of an example of a stapler according to the present embodiment. Figure 1C 2 is a perspective view showing an example of the stapler of the present embodiment. Figure 2A , Figure 2B 1 is a front cross-sectional view of a main part showing an example of a bending portion of the stapler according to the present embodiment, Figure 3A , Figure 3B 1 is a front cross-sectional view showing an example of a bending portion of the stapler of the present embodiment. Figure 4 It is a main part perspective view showing an example of the driving unit of the stapler according to the present embodiment.

[0034] The stapler 1A includes a punching unit 2, a bending unit 3, a connecting unit 100, transmission units 101, 102, 103, and a driving unit 5. The punching unit 2 is provided at a position perpendicular to the paper surface of the paper P during the binding process of binding the paper P with the needle 11, and punches the needle 11 toward the paper P. The bending unit 3 is provided at a position facing the punching unit 2 across the paper P during the above-mentioned binding process, and bends a pair of pins 11a and 11b of the needle 11 punched by the punching unit 2 and penetrating the paper P. The connecting unit 100 connects the punching unit 2 and the bending unit 3 on a side perpendicular to the paper feeding direction of the paper P passing between the punching unit 2 and the bending unit 3 before and after the above-mentioned binding process and along the paper surface of the paper P. The paper feeding direction of the paper P is indicated by an arrow F. In addition, the direction along the paper surface of the paper P is indicated by an arrow C. The driving unit 5 includes a single motor 51. The single motor 51 drives the punching unit 2 and the bending unit 3. The transmission part 101 transmits the driving force of the motor 51 to the punching part 2. The transmission part 102 transmits the driving force of the motor 51 to the connecting part 100. The transmission part 103 transmits the driving force of the motor 51 to the bending part 3 via the connecting part 100. The details of the connecting part 100, the transmission parts 101, 102, and 103 will be described later. The punching part 2 and the bending part 3 face each other with the paper area 10 in between. The stapler 1A includes a frame 10a, a frame 10b, and a pair of frames 10c and 10d connecting the frame 10a and the frame 10b. The paper area 10 is composed of a space between the punching part 2 and the bending part 3. The space between the punching part 2 and the bending part 3 is defined by the frame 10a, the frame 10b, and a pair of frames 10c and 10d connecting the frame 10a and the frame 10b.

[0035] The frame 10a has a punching unit 2 disposed therein, constituting the outer casing of the punching unit 2. In addition, the frame 10a has a motor 51 and transmission units 101 and 102 disposed therein. The frame 10b has a bending unit 3 disposed therein, constituting the outer casing of the bending unit 3. In addition, the frame 10b has a transmission unit 103 disposed therein. The frame 10c connects the frame 10a and the frame 10b on one side which is perpendicular to the paper feeding direction of the paper P indicated by the arrow F and along the direction of the paper surface of the paper P. The frame 10c has a connecting unit 100 disposed therein. The frame 10d connects the frame 10a and the frame 10b on the other side which is perpendicular to the paper feeding direction of the paper P and along the direction of the paper surface of the paper P. The punching unit 2 does not protrude from the frame 10a to the inner side of the paper area 10 except when the punching unit 2 is in the operation of clamping the paper P between the frame 10a and the bending unit 3. In addition, the motor 51 and the transmission units 101 and 102 do not protrude from the frame 10a to the inner side of the paper area 10. Furthermore, the bending portion 3 and the transmission portion 103 do not protrude from the frame 10b to the inside of the paper region 10. In addition, the connection portion 100 does not protrude from the frame 10c to the inside of the paper region 10.

[0036] Thus, the paper area 10 is opened on the upstream and downstream sides relative to the paper feeding direction of the paper P, and the paper P can pass through. In addition, the two sides of the paper area 10 that are perpendicular to the paper feeding direction of the paper P and along the paper surface of the paper P are blocked by the frames 10c and 10d. The frame 10c and the frame 10d face each other at a distance wider than the maximum width of the paper P that can pass through. In addition, the frame 10a and the frame 10b face each other at a distance wider than the thickness of the stack of the maximum number of sheets of paper P that can be bound. Moreover, the punching part 2 and the bending part 3 are connected via the frames 10c and 10d on both sides that are perpendicular to the paper feeding direction of the paper P and along the paper surface of the paper P.

[0037] The driving unit 2 includes a first driving unit 21, a second driving unit 22, and a power transmission unit 23. The first driving unit 21 is an example of a driving unit or a first driving unit. The needle 11 driven by the first driving unit 21 is an example of a first needle, and a pair of pins 11a and 11b of the needle 11 driven by the first driving unit 21 are an example of pins of the first needle. The second driving unit 22 is an example of a second driving unit. The needle 11 driven by the second driving unit 22 is an example of a second needle, and a pair of pins 11a and 11b of the needle 11 driven by the second driving unit 22 are an example of pins of the second needle.

[0038] The first driving unit 21 includes a driving plate 21a and a power transmission unit 21b. The driving plate 21a is supported to be movable along the direction in which a pair of pins 11a and 11b of the needle 11 extend. The power transmission unit 21b is composed of a gear constituting a cam, a connecting rod displaced by the rotation of the gear, etc., and transmits the action of the driving unit 5 to the driving plate 21a. The driving plate 21a is driven by the driving unit 5 via the power transmission unit 21b to drive the needle 11. In addition, the first driving unit 21 includes a forming plate for molding the needle 11. In addition, the first driving unit 21 includes a mounting portion for detachably mounting a box containing the needle 11 before molding.

[0039] The second driving unit 22 includes a driving plate 22a and a power transmission unit 22b. The driving plate 22a is supported to be movable along the direction in which the pair of pins 11a and 11b of the needle 11 extend. The power transmission unit 22b is composed of a gear constituting a cam, a connecting rod displaced by the rotation of the gear, etc., and transmits the action of the driving unit 5 to the driving plate 22a. The driving plate 22a is driven by the driving unit 5 via the power transmission unit 22b to drive the needle 11. In addition, the second driving unit 22 includes a forming plate for molding the needle 11. In addition, the second driving unit 22 includes a mounting portion for detachably mounting a box containing the needle 11 before molding.

[0040] The power transmission part 23 is composed of a shaft or the like that connects the power transmission part 21b of the first driving part 21 and the power transmission part 22b of the second driving part 22. The power transmission part 23 transmits the action transmitted from the driving part 5 to the power transmission part 21b to the power transmission part 22b. Thus, the driving plate 21a and the driving plate 22a are linked.

[0041] The first punching unit 21 and the second punching unit 22 are arranged in parallel in a direction perpendicular to the feeding direction of the paper P and along the paper surface of the paper P. The needle crowns 11 c of the needles 11 punched by the first punching unit 21 and the second punching unit 22 extend in a direction perpendicular to the feeding direction of the paper P and along the paper surface of the paper P.

[0042] The bending portion 3 includes a first bending portion 31 and a second bending portion 32. The first bending portion 31 is an example of a bending portion or a first bending portion, and the second bending portion 32 is an example of a second bending portion. The first bending portion 31 includes a first clinching portion 31a, a second clinching portion 31b, and a clamping portion 33a. The first clinching portion 31a and the second clinching portion 31b of the first bending portion 31 are an example of a pair of first clinching portions. The first bending portion 31 faces the first punching portion 21 across the paper area 10. The clamping portion 33a is a surface facing the first punching portion 21, and is provided on a frame 34a of the first bending portion 31. The clamping portion 33a is provided with an opening 35a through which the first clinching portion 31a and the second clinching portion 31b are exposed.

[0043] The first clincher 31a includes a receiving portion 36a and an acted portion 37a. The first clincher 31a is rotatably supported on the frame 34a with the shaft 38a as a fulcrum. The first clincher 31a contacts the pin 11a during the binding process described above and rotates in the bending direction of the pin 11a with the shaft 38a as a fulcrum. Rotation is also referred to as rotation. Rotation means rotation within a range of less than 360°. The first clincher 31a rotates with the shaft 38a as a fulcrum. Figure 2A The bending standby position shown is the same as Figure 2B Move between the bending positions shown.

[0044] The receiving portion 36a is provided at a position that moves toward and away from the clamping portion 33a by the rotation of the first clincher 31a with the shaft 38a as a fulcrum. The receiving portion 36a is exposed at the opening 35a of the clamping portion 33a.

[0045] In a state where the first clincher 31 a is moved to the bending standby position, the receiving portion 36 a is inclined in a direction away from the clamping portion 33 a as it moves from the shaft 38 a toward the front end side facing the second clincher 31 b .

[0046] The receiving portion 36a moves from the bending standby position to a direction approaching the clamping portion 33a, i.e., a first direction indicated by arrow A1, by the rotation of the first clincher 31a with the shaft 38a as a fulcrum. In addition, the receiving portion 36a moves from the bending position to a direction away from the clamping portion 33a, i.e., a second direction indicated by arrow A2 opposite to arrow A1, i.e., a direction indicated by arrow A2.

[0047] The first clincher 31a includes a front end portion 300a. The acted portion 37a is provided between the front end portion 300a and the shaft 38a at a location on the opposite side of the receiving portion 36a. The first clincher 31a moves from the bending standby position to the bending position by receiving a force pressing the acted portion 37a.

[0048] The second clincher 31b includes a receiving portion 36b and an acted portion 37b. The second clincher 31b is provided on the opposite side of the clamping portion 33a to the side facing the first driving portion 21. The second clincher 31b is rotatably supported by the frame 34a with the shaft 38b as a fulcrum.

[0049] The second clincher 31b contacts the pin 11b during the binding process and rotates in the bending direction of the pin 11b with the shaft 38b as a fulcrum. Figure 2A The bending standby position shown is the same as Figure 2B Move between the bending positions shown.

[0050] The receiving portion 36b is provided at a position that moves toward and away from the clamping portion 33a by the rotation of the second clincher 31b with the shaft 38b as a fulcrum. The receiving portion 36b is exposed at the opening 35a of the clamping portion 33a.

[0051] In a state where the second clincher 31 b has moved to the bending standby position, the receiving portion 36 b is inclined in a direction away from the clamping portion 33 a as it moves from the shaft 38 b toward the front end side facing the first clincher 31 a .

[0052] The receiving portion 36b moves from the bending standby position toward the clamping portion 33a, i.e., in the first direction indicated by arrow A1, by the rotation of the second clincher 31b about the shaft 38b. Also, the receiving portion 36b moves from the bending position toward the clamping portion 33a, i.e., in the second direction indicated by arrow A2.

[0053] The second clincher 31b includes a front end portion 300b. The acted portion 37b is provided between the front end portion 300b and the shaft 38b at a position on the opposite side to the receiving portion 36b. The second clincher 31b moves from the bending standby position to the bending position by receiving a force pressing the acted portion 37b. When the first clincher 31a moves to the bending standby position, the second clincher 31b moves to the bending standby position in conjunction. In addition, when the first clincher 31a moves to the bending position, the second clincher 31b moves to the bending position in conjunction. The shaft 38a and the shaft 38b are examples of a first shaft, and the front end portions 300a and 300b are examples of a first front end portion.

[0054] The second curved portion 32 includes a first clincher 32a, a second clincher 32b, and a clamping portion 33b. The first clincher 32a and the second clincher 32b of the second curved portion 32 are an example of a pair of second clincher portions. The second curved portion 32 faces the second punching portion 22 across the paper area 10. The clamping portion 33b is a surface facing the second punching portion 22, and is provided on a frame 34b of the second curved portion 32. The clamping portion 33b is provided with an opening 35b through which the first clincher 32a and the second clincher 32b are exposed.

[0055] The first clincher 32 a and the second clincher 32 b of the second curved portion 32 have the same structure as the first clincher 31 a and the second clincher 31 b of the first curved portion 31 .

[0056] The driving unit 5 includes the above-mentioned single motor 51. The connecting unit 100 includes a first connecting rod 54. The transmission unit 101 includes a gear group 51b meshing with the gear 51a of the motor 51 and a shaft 51c rotating together with the gear group 51b. The transmission unit 102 includes a gear 53 and a gear 52 meshing with the gear 53. The gear 52 is mounted on the shaft 51c. In this way, the transmission unit 101 and the transmission unit 102 may also share a part of the gear, shaft, etc. The transmission unit 103 includes a second connecting rod 55, a third connecting rod 55B and a conversion unit 55C. The motor 51 is arranged on the inner side of the frame 10a on the side opposite to the side where the second ejecting unit 22 is arranged, on the side of the first ejecting unit 21, along a direction intersecting the surface of the paper P passing through the paper area 10. The transmission unit 101 transmits the rotation of the motor 51 to the power transmission unit 21b of the first ejecting unit 21 via the gear group 51b, the shaft 51c, etc. The transmission unit 102 transmits the rotation of the motor 51 to the first link 54 constituting the connection unit 100 via the gear train 51b, the shaft 51c, the gear 52, and the gear 53. The transmission units 101, 102, and 103 are examples of first transmission units.

[0057] The gear 53 is disposed inside the frame 10a of the punching part 2. The gear 53 is disposed on the outside of the motor 51 relative to the first punching part 21. In the present embodiment, the output shaft of the motor 51 protrudes inwardly toward the first punching part 21, and the gear 51a is disposed on the inside toward the first punching part 21. Therefore, the rotation of the motor 51 is transmitted to the gear 53 via the transmission part 102 having the shaft 51c extending toward the outside of the motor 51 relative to the first punching part 21, and the gear 53 rotates. The gear 53 has a cam groove 53a that depicts a trajectory of changes in distance from the center of rotation. The cam groove 53a is an example of a cam and extends along the circumferential direction of the gear 53.

[0058] The first connecting rod 54 is an example of a connecting rod, a first connecting rod, and is provided on the inner side of the frame 10c on the side of the paper area 10, which is perpendicular to the paper feeding direction of the paper P indicated by the arrow F and along the paper surface of the paper P. The first connecting rod 54 does not protrude toward the paper area 10 and does not hinder the paper feeding. The first connecting rod 54 extends along the direction in which the punching portion 2 and the curved portion 3 are opposite. The first connecting rod 54 is supported to be movable in a third direction indicated by an arrow B1 in the direction in which the punching portion 2 and the curved portion 3 are opposite and in a fourth direction indicated by an arrow B2 in the opposite direction to the third direction. The third direction and the fourth direction are directions perpendicular to the paper surface of the paper P passing through the paper area 10, and in this example, are up and down directions.

[0059] The first link 54 includes a first cam follower 54a and a second cam follower 54b. The first cam follower 54a is provided on the side of the driving portion 2 along the direction in which the first link 54 extends. When the gear 53 rotates, the first cam follower 54a follows the trajectory of the cam groove 53a, so that the first link 54 moves in the third direction and the fourth direction. The second cam follower 54b is an example of the conversion portion 55C, and is provided on the side of the bending portion 3 along the direction in which the first link 54 extends.

[0060] The second link 55 is an example of a link, a second link, and is disposed inside the frame 10b of the curved portion 3. The third link 55B is an example of a second transmission portion, a link, and a third link, and is disposed inside the frame 10b of the curved portion 3. The third link 55B is disposed on an extension line of the second link 55. The second link 55 and the third link 55B extend in a direction in which the first curved portion 31 and the second curved portion 32 are parallel. The second link 55 and the third link 55B are supported to be movable in a fifth direction indicated by an arrow C1 in a direction in which the first curved portion 31 and the second curved portion 32 are parallel, and in a sixth direction indicated by an arrow C2 in an opposite direction to the fifth direction. The fifth direction and the sixth direction are directions along the surface of the paper P passing through the paper region 10, and are horizontal directions in this example.

[0061] The second link 55 includes a cam groove 55a and action portions 56a and 56b. The third link 55B includes action portions 56c and 56d.

[0062] The cam groove 55a is an example of the conversion portion 55C, and extends obliquely with respect to the moving direction of the first link 54 and the moving directions of the second link 55 and the third link 55B. The second cam follower 54b of the first link 54 enters the cam groove 55a.

[0063] The acting portion 56a is an example of a protrusion or a first protrusion, and faces the acted portion 37a of the first clinch portion 31a of the first curved portion 31. The acting portion 56b is an example of a protrusion or a first protrusion, and faces the acted portion 37b of the second clinch portion 31b of the first curved portion 31. The acting portion 56c is an example of a second protrusion, and faces the acted portion 37a of the first clinch portion 32a of the second curved portion 32. The acting portion 56d is an example of a second protrusion, and faces the acted portion 37b of the second clinch portion 32b of the second curved portion 32.

[0064] Figure 3A The first clinch portion 31a and the second clinch portion 31b of the first curved portion 31 and the first clinch portion 32a and the second clinch portion 32b of the second curved portion 32 are shown as follows: Figure 2A From this state, when the first link 54 moves in the third direction indicated by arrow B1, the second cam follower 54b of the first link 54 pushes the lower surface of the inclined cam groove 55a of the second link 55. As a result, the second link 55 moves in the fifth direction indicated by arrow C1.

[0065] Figure 3B The first clinch portion 31a and the second clinch portion 31b of the first curved portion 31 and the first clinch portion 32a and the second clinch portion 32b of the second curved portion 32 are shown as follows: Figure 2B From this state, when the first link 54 moves in the fourth direction indicated by arrow B2, the second cam follower 54b of the first link 54 pushes the upper surface of the inclined cam groove 55a of the second link 55. As a result, the second link 55 moves in the sixth direction indicated by arrow C2.

[0066] When the gear 53 rotates in a predetermined direction by a predetermined angle, the first cam follower 54a follows the trajectory of the cam groove 53a, so that the first link 54 moves in the third direction or the fourth direction. According to the usage form of the stapler 1A, the moving direction of the first link 54 becomes the vertical direction, and the moving direction of the second link 55 becomes the horizontal direction. Thus, the rotational motion of the gear 53 is converted into a vertical direct motion of the first link 54 orthogonal to the paper surface of the paper P passing through the paper area 10, and the vertical direct motion of the first link 54 is converted into a horizontal direct motion of the second link 55 along the paper surface of the paper P passing through the paper area 10.

[0067] As described above, the first link 54 is located outside the paper region 10 where the paper P is located during the binding process, on the side that is perpendicular to the paper feeding direction of the paper P passing between the ejection section 2 and the bending section 3 before and after the binding process and along the paper surface of the paper P, and follows the cam groove 53a of the gear 53 as an example of a cam to be displaced in the direction perpendicular to the paper surface of the paper P. The second link 55 is located below the paper region 10, and moves in the direction along the paper surface of the paper P to rotate the first clincher 31a and the second clincher 31b of the first bending section 31. In addition, the third link 55B is located below the paper region 10, and moves in the direction along the paper surface of the paper P to rotate the first clincher 32a and the second clincher 32b of the second bending section 32. The conversion section 55C is located between the first link 54 and the second link 55, and converts the displacement of the first link 54 in the direction perpendicular to the paper surface of the paper P into the displacement of the second link 55 in the direction along the paper surface of the paper P.

[0068] The bending portion 3 includes a support member 39. The support member 39 supports the second link 55 from below, and suppresses the second link 55 from bending.

[0069] <Operation Example of the Stapler of the Present Embodiment> The stapler 1A stops conveying the paper P when the center of the paper P perpendicular to the paper feeding direction passing through the paper area 10 coincides with the punching positions of the punching pins 11 of the first and second punching sections 21 and 22 .

[0070] When the motor 51 of the driving unit 5 rotates, the driving plate 21a of the first driving unit 21 moves in the driving direction, that is, the first direction indicated by the arrow A1. In addition, the driving plate 22a of the second driving unit 22 moves in the driving direction in conjunction with the driving plate 21a.

[0071] The operation will be described below using the first punching portion 21 and the first curved portion 31 as an example. The punching plate 21 a moves in the punching direction to press the needle crown 11 c of the needle 11 , so that the needle legs 11 a and 11 b penetrate the paper P.

[0072] The pin 11 a passing through the paper P contacts the receiving portion 36 a of the first clincher 31 a of the first bending portion 31 , and the pin 11 b passing through the paper P contacts the receiving portion 36 b of the second clincher 31 b of the first bending portion 31 .

[0073] By further pressing the needle crown 11c of the needle 11 by the punching plate 21a, the pin 11a that has penetrated the paper P is guided along the receiving portion 36a that is inclined due to the movement of the first clincher 31a to the bending standby position, and is bent inward. In addition, the pin 11b that has penetrated the paper P is guided along the receiving portion 36b that is inclined due to the movement of the second clincher 31b to the bending standby position, and is bent inward.

[0074] When the motor 51 of the driving unit 5 rotates, the gear 53 rotates. When the driving plate 21a moves in the driving direction to a position where the needle crown 11c of the needle 11 contacts the surface of the paper P, the gear 53 moves the first link 54 in the third direction indicated by the arrow B1.

[0075] When the gear 53 further rotates, the first link 54 moves in the third direction, so that the second cam follower 54b of the first link 54 pushes the inclined cam groove 55a of the second link 55. Thus, the second link 55 moves in the fifth direction indicated by the arrow C1.

[0076] When the second link 55 moves in the fifth direction, the acting portion 56a presses the acted portion 37a of the first clinching portion 31a of the first bending portion 31. As a result, the first clinching portion 31a is moved from the bending standby position to the bending position by receiving the force pressing the acted portion 37a. When the first clinching portion 31a moves to the bending position, the receiving portion 36a presses the pin 11a toward the back side of the paper P, and bends the front end of the pin 11a toward the back side of the paper P.

[0077] When the second link 55 moves in the fifth direction, the acting portion 56b presses the acted portion 37b of the second clinching portion 31b of the first bending portion 31. As a result, the second clinching portion 31b moves from the bending standby position to the bending position by receiving the force pressing the acted portion 37b. When the second clinching portion 31b moves to the bending position, the receiving portion 36b presses the pin 11b toward the back side of the paper P, and bends the front end of the pin 11b toward the back side of the paper P.

[0078] In the above, the operation is described by taking the first driving portion 21 and the first bending portion 31 as an example, but the operation of the second driving portion 22 and the second bending portion 32 is also the same.

[0079] <Example of the Effect of the Stapler of the Present Embodiment> The connecting portion 100 is provided with a first link 54 at a side portion which is perpendicular to the paper feeding direction indicated by arrow F and along the paper surface of the paper P and is located outside the paper area 10. Thus, the paper area 10 is opened at the upstream and downstream sides relative to the paper feeding direction of the paper P, and the paper P can pass through.

[0080] Therefore, the stapler 1A can make the ejection positions of the ejection pins 11 of the first ejection unit 21 and the second ejection unit 22 coincide with the center of the paper P perpendicular to the paper feeding direction of the paper P. Therefore, the stapler 1A can bind the paper P by a method called saddle stitching.

[0081] The stapler 1A includes a motor 51 in the driving unit 2 to drive the first driving unit 21 and the second driving unit 22 , and transmits the driving force of the motor 51 to the bending unit 3 via the first link 54 to operate each clincher.

[0082] Thus, in the stapler 1A capable of binding the paper P in a manner called saddle stitching, the amount of the bent pins protruding toward the back side of the paper can be suppressed. In addition, the front end of the pins can be directed toward the back side of the paper. Furthermore, the punching unit 2 and the bending unit 3 can be driven by a single motor 51, thereby reducing costs.

[0083] In addition, the first connecting rod 54 moves along the frame 10c (direct motion). As a result, the space required for the movement of the first connecting rod 54 will not expand in the direction close to the paper area 10 and the direction away from the paper area 10, which can suppress the enlargement of the device. In addition, the gear 53 is provided in the punching part 2. As a result, there is no need to set the section of the gear 53 between the frame 10c and the paper area 10, which can suppress the enlargement of the device. In addition, the second connecting rod 55 and the third connecting rod 55B move along the frame 10b (direct motion). As a result, the space required for the movement of the second connecting rod 55 and the third connecting rod 55B will not expand in the direction close to the paper area 10 and the direction away from the paper area 10, which can suppress the enlargement of the device.

[0084] When the number of sheets of paper P to be bound increases, the load applied when the pins 11a and 11b of the needle 11 penetrate the paper bundle becomes larger than when the number of sheets of paper P is small. Therefore, when the number of sheets of paper P to be bound increases, the positions of the front ends of the pins 11a and 11b of the needle 11 that penetrate the paper bundle may shift. If the front end of the pin 11a of the needle 11 that penetrates the paper bundle shifts to a position where it cannot contact the receiving portion 36a of the first clincher 31a, the pin 11a cannot be bent. Similarly, when the front end of the pin 11b of the needle 11 that penetrates the paper bundle shifts to a position where it cannot contact the receiving portion 36b of the second clincher 31b, the pin 11b cannot be bent.

[0085] In contrast, the receiving portion 36a moves in a direction approaching and a direction away from the clamping portion 33a by the rotation of the first clincher 31a with the shaft 38a as a fulcrum. When the first clincher 31a moves to the bending standby position, the receiving portion 36a is separated from the clamping portion 33a. Thus, by lengthening the receiving portion 36a, the range that the pin 11a can contact can be increased. On the other hand, when the first clincher 31a moves to the bending position, the receiving portion 36a approaches the clamping portion 33a. Thus, even if the receiving portion 36a is extended, the pin 11a can be pressed against the back side of the paper P. Similarly, the receiving portion 36b moves in a direction approaching and a direction away from the clamping portion 33b by the rotation of the second clincher 31b with the shaft 38b as a fulcrum. When the second clincher 31b moves to the bending standby position, the receiving portion 36b is separated from the clamping portion 33b. Thus, by lengthening the receiving portion 36b, the range that the pin 11b can contact can be increased. On the other hand, when the second clincher 31b is moved to the bent position, the receiving portion 36b approaches the clamping portion 33b. Thus, even if the receiving portion 36b is extended, the pin 11b can be pressed against the back surface of the paper P.

[0086] <Modification of the Stapler of the Present Embodiment> Figure 5A , Figure 5B 1B is a perspective view of the main parts of a modified example of the stapler of the present embodiment. The stapler 1B includes a paper area (not shown), a punching unit, a bending unit 3B, and a driving unit 5B. The bending unit 3B includes a first clincher 31a, a second clincher 31b, and a first acted portion 37c.

[0087] The first clincher 31a includes a receiving portion 36a and a second acted portion 37a. The first clincher 31a is supported to be rotatable about the shaft 38a as a fulcrum. Figure 5A The bending position shown is similar to Figure 5B Move between the bent standby positions shown.

[0088] The second clincher 31b includes a receiving portion 36b and a second acted portion 37b. The second clincher 31b is supported to be rotatable about the shaft 38b as a fulcrum. Figure 5A The bending position shown is similar to Figure 5B Move between the bent standby positions shown.

[0089] The first acted portion 37c rotates around the shaft 37d as a fulcrum, pressing the second acted portion 37a of the first clincher 31a and the second acted portion 37b of the second clincher 31b. The first clincher 31a moves from the bending standby position to the bending position by receiving the force pressing the second acted portion 37a. The second clincher 31b moves from the bending standby position to the bending position by receiving the force pressing the second acted portion 37b.

[0090] The driving unit 5B includes a rotating body 53B, a first link 57, and a second link 58. The rotating body 53B is an example of a transmission unit, and includes a cam 53c that describes a trajectory of changes in distance from the center of rotation. The cam 53c extends in the circumferential direction of the rotating body 53B.

[0091] The first link 57 is an example of a connecting portion or a link, and includes a cam follower 57a and an engaged portion 57b. When the rotating body 53B rotates, the cam follower 57a follows the trajectory of the cam 53c, and the first link 57 rotates about a shaft (not shown) entering the support hole 57c as a fulcrum.

[0092] The second link 58 is an example of a transmission part and a link, and includes an engagement part 58a, a shaft 58b, and an action part 58c. The engagement part 58a enters the engaged part 57b of the first link 57. The action part 58c faces the first acted part 37c, and when the second link 58 rotates, it rotates around the shaft 58b as a fulcrum.

[0093] Thus, when the rotating body 53B rotates, the first link 57 is displaced (rotated) following the cam 53 c . Also, the second link 58 is displaced (rotated) following the displacement of the first link 57 .

[0094] When the second link 58 is displaced (rotated), the acting portion 58c rotates with the shaft 58b as a fulcrum. When the acting portion 58c rotates, the first acted portion 37c rotates with the shaft 37d as a fulcrum, thereby pressing the second acted portion 37a of the first clincher 31a and the second acted portion 37b of the second clincher 31b. The first clincher 31a moves from the bending standby position to the bending position by receiving the force pressing the second acted portion 37a. The second clincher 31b moves from the bending standby position to the bending position by receiving the force pressing the second acted portion 37b.

[0095] Fig. 6A , Figure 6B and Fig. 7A , Figure 7B It is a perspective view of main parts showing another modified example of the stapler of the present embodiment. Fig. 6A , Figure 6B This is a perspective view of the main parts of the stapler, when the curved portion 3C is viewed from the surface. Fig. 7A , Figure 7BThis is a perspective view of the main parts of the stapler, when the curved portion 3C is viewed from the back.

[0096] The bending portion 3C includes a first clincher 31a and a second clincher 31b. The first clincher 31a includes a receiving portion 36a and an acted portion 37e. The first clincher 31a is supported to be rotatable about the shaft 38a as a fulcrum. The first clincher 31a rotates about the shaft 38a as a fulcrum. Fig. 6A , Fig. 7A The bending standby position shown is the same as Figure 6B , Figure 7B The acted portion 37e is constituted by a shaft protruding from the first clincher 31a.

[0097] The second clincher 31b includes a receiving portion 36b and an acted portion 37f. The second clincher 31b is supported to be rotatable about the shaft 38b as a fulcrum. Fig. 6A , Fig. 7A The bending standby position shown is the same as Figure 6B , Figure 7B The acted portion 37f is constituted by a shaft protruding from the first clincher 31a.

[0098] The second link 59 is an example of a transmission portion or a link, and is supported to be movable in a fifth direction indicated by an arrow C1 and a sixth direction indicated by an arrow C2 which is the opposite direction to the fifth direction. The second link 59 includes action portions 59a and 59b.

[0099] The acting portion 59a is formed of a cam groove extending along the fifth and sixth directions and having an inclined surface along the direction in which the first clincher 31a rotates. The acted portion 37e of the first clincher 31a enters the acting portion 59a. The acting portion 59b is formed of a cam groove extending along the fifth and sixth directions and having an inclined surface along the direction in which the second clincher 31b rotates. The acted portion 37f of the second clincher 31b enters the acting portion 59b.

[0100] When the second link 59 moves in the fifth direction, the acting portion 59a presses the acted portion 37e of the first clinch portion 31a by the inclined surface. Thus, the first clinch portion 31a moves from the bending standby position to the bending position by receiving the force of pressing the acted portion 37e. In addition, when the second link 59 moves in the fifth direction, the acting portion 59b presses the acted portion 37f of the second clinch portion 31b by the inclined surface. Thus, the second clinch portion 31b moves from the bending standby position to the bending position by receiving the force of pressing the acted portion 37f.

[0101] In the bending portion 3C, the first clincher 31a and the second clincher 31b can be arranged along the axial direction of the respective shafts 38a, 38b to overlap with the second link 59. Thus, the height of the bending portion 3C along the direction in which the first clincher 31a and the second clincher 31b rotate can be suppressed.

[0102] Figures 8A to 8D 1 is a front view showing a modified example of the stapler of the present embodiment. Figure 1A In the embodiment, the single motor 51 is disposed between the punching unit 2 and the connecting unit 100, specifically, between the punching unit 2 and the first connecting rod 54 constituting the connecting unit 100 and the gear 53 constituting the transmission unit 102. Fig. 8A In the described stapler 1C, a single motor 51 is provided in the middle of the connecting portion 100 to drive the punching portion 2 and the bending portion 3. In this case, the output shaft of the motor 51 may be directed to protrude outward, and the gear of the motor 51 may be directly meshed with the gear 53 or meshed with the gear 53 via another gear. Figure 8B In the described stapler 1D, a single motor 51 is provided between the connecting portion 100 and the bending portion 3 to drive the driving portion 2 and the bending portion 3. In the structure in which the motor 51 is provided between the connecting portion 100 and the bending portion 3, the transmission portion 101 may transmit the driving force of the motor 51 to the driving portion 2 via the connecting portion 100. The connecting portion 100 is not limited to a connecting rod, and may be a gear train or the like that connects the driving portion 2 and the bending portion 3 so as to transmit the driving force.

[0103] Moreover, in Figure 8C In the described stapler 1E, when the side where the connecting portion 100 (first link 54) is provided is set as a side along the direction of the paper surface of the paper P, a single motor 51 is provided on the other side along the direction of the paper surface of the paper P across the punching portion 2, and drives the punching portion 2 and the bending portion 3. In this case, in a structure in which the punching portion 2 includes the first punching portion 21 and the second punching portion 22, the connecting portion 100 can be provided on one side along the direction of the paper surface of the paper P across the first punching portion 21 and the second punching portion 22, and the single motor 51 is provided on the other side. In addition, in the stapler 1F in which the punching portion 2 includes the first punching portion 21 and the second punching portion 22, as Fig.8D As shown, a single motor 51 may be provided between the first driving unit 21 and the second driving unit 22 . Description of Reference Numerals

[0104] 1A, 1B, 1C, 1D, 1E, 1F...stapler, 10...paper area, 10a, 10b, 10c, 10d...frame, 100...connecting part, 101, 102, 103...transmission part, 2...punching part, 21...first punching part, 21a...punching plate, 21b...power transmission part, 22...second punching part, 22a...punching plate, 22b...power transmission part, 23...power transmission part part, 3···bending part, 31···first bending part, 32···second bending part, 31a, 32a···first clinching part, 31b, 32b···second clinching part, 33a, 33b···clamping part, 34a, 34b···frame, 35a, 35b···opening, 36a, 36b···receiving part, 37a, 37b···acted part, 37c...first acted part, 38a...axis, 39·· ·Supporting member, 5···driving unit, 51···motor, 52···gear, 53···gear, 53a…cam groove (cam), 54···first link (link, first link), 54a…first cam follower, 54b…second cam follower (conversion unit 55C), 55···second link (link, second link), 55a…cam groove (conversion unit 55C), 55B…third link (second transmission unit, link, third link), 56a, 56b···acting part (protrusion), 56c, 56d···acting part (second protrusion), 57···first link (connecting part, connecting rod), 57a···cam follower, 57b···engaged part, 58···second link (transmitting part, connecting rod), 58a...engaging part, 58b...shaft, 58c...acting part, 59···second link (transmitting part, connecting rod), 59a, 59b...acting part.

Claims

1. A stapler that performs a binding process of binding sheets of paper using a needle. The stapler has: A punching unit, arranged at a position perpendicular to the paper surface of the paper during the binding process, punching the needle toward the paper; A bending portion is provided at a position facing the punching portion across the paper during the binding process, so as to bend the pin of the needle punched by the punching portion and penetrating the paper; A single motor drives the striking portion and the bending portion; a connecting portion connecting the punching portion and the bending portion at a side perpendicular to a paper feeding direction of the paper and along a direction of the paper surface, wherein the paper feeding direction is a direction in which the paper passes between the punching portion and the bending portion before and after the binding process; and The transmission part transmits the driving force of the motor to the driving part and / or the bending part via the connecting part.

2. The stapler according to claim 1, wherein: The transmission portion transmits the driving force of the motor to the bending portion via the connection portion.

3. The stapler according to claim 1, wherein: The motor is disposed between the punching portion and the connecting portion, in the middle of the connecting portion, between the connecting portion and the bending portion, or on the other side of the punching portion along the direction of the paper surface.

4. The stapler according to claim 1, wherein: The motor is disposed between the driving portion and the connecting portion.

5. The stapler according to claim 1, wherein: The bending portion includes a pair of clinchers, the pair of clinchers abutting against the stitches during the binding process and including front end portions that rotate in a bending direction of the stitches with an axis as a fulcrum, The transmitting portion rotates the clincher.

6. The stapler according to claim 5, wherein: The connecting portion has a first link on the one side, the first link being located outside a sheet area where the sheets are located during the binding process and being displaced in a direction orthogonal to the sheet surface. The transmission part has: A cam, which is rotated by the driving force of the motor to displace the first connecting rod in the direction orthogonal to the paper surface; A second connecting rod is located below the paper area and moves in a direction along the paper surface to rotate the clincher; and The conversion portion is located between the first link and the second link, and converts a displacement of the first link in a direction perpendicular to the paper surface into a displacement of the second link in a direction along the paper surface.

7. The stapler according to claim 6, wherein: The second link has a protrusion that protrudes in the bending direction and abuts between the shaft and the front end of the clincher. When the second link is displaced in the direction along the paper surface, the protrusion comes into contact with the clincher and the clincher is rotated in the bending direction.

8. The stapler according to claim 7, wherein: The stapler has: A second punching unit is adjacent to the punching unit on the other side of the direction perpendicular to the paper feeding direction and along the paper surface, and punches a second needle toward the paper; and The second bending portion is provided at a position facing the second punching portion across the paper during the binding process, and bends the legs of the second needle punched by the second punching portion and penetrating the paper. The single motor also drives the second punching part. The transmission unit includes a second transmission unit that transmits the driving force of the single motor to the second bending portion.

9. The stapler according to claim 8, wherein: The second transmission portion includes a third link that is continuous with the second link and that moves the second bending portion by being displaced in a direction along the paper surface in conjunction with the second link.

10. The stapler according to claim 9, wherein: The second bending portion has a pair of second clincher portions, and the second front end portions of the pair of second clincher portions rotate in the bending direction of the pin leg of the second needle with the second axis as a fulcrum. The third link has a second protrusion that protrudes in the bending direction of the pin leg of the second needle and abuts between the second shaft and the second front end portion of the second clincher. By displacement of the third link, the second protrusion comes into contact with the second clincher and simultaneously the second clincher is rotated in the bending direction of the leg of the second needle.

11. The stapler according to claim 8, wherein: The motor is disposed between the first and second striking parts.

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