JPH0970768A - Clinch mechanism in stapler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drive a movable clincher without any vertical movement, and to operate a driver and the movable clincher at the same timing irrespective of the thickness of papers to be stapled. SOLUTION: A clinch mechanism is provided with a base member 1 having a movable clincher 7 and an operating member 10, a frame member 2 provided with a magazine and a driver 16, and an operation handle 3 to be operated in the vertical direction, and a link mechanism to operate an operation mechanism of the driver 16 and the operating member 10 for the movable clincher are provided on the operation handle 3 and the frame member 2. The driver 16 is operated by the driver operating mechanism in the first half of the movement of the operation handle 3, and the link mechanism is operated in the second half of the movement of the operation handle 3 to turn the movable clincher 7 by the operating member 10. A paper thickness adjusting mechanism to prevent the operating member 10 from being operated irrespective of the thickness of the papers before the frame member 2 is abutted on the upper surface of the material to be stapled is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clinch mechanism for penetrating a sheet to be bound by an operating handle and bending a leg portion of a staple that has penetrated by a movable clincher.

[0002]

2. Description of the Related Art A conventional stapler clinching mechanism is a type in which a leg portion of a staple penetrating a sheet to be bound is bent at a fixed clincher groove, and a clincher is driven after the leg portion penetrates to staple the leg portion of the stapler. There is a folding type. As an example of the latter, actual fairness 6-166
The one disclosed in Japanese Patent No. 64 is known. This is related to the clincher mechanism that drives the clincher up and down to bend the staple legs flat.
The clincher 20 is shown in FIG. 1 and FIG.
It is disclosed to move up and down together with 5.

[0003]

However, according to the configuration in which the clincher 20 moves up and down as described above, the clincher 20 shown in FIG.
Since the paper to be bound is curved as shown in FIG. 3, there is a defect that a bulge portion is formed in the center when staples are driven in at two places.

The present invention solves this problem and is capable of stapling without moving the clincher part up and down, and can keep the operation timing of the driver and the movable clincher constant regardless of the thickness of the paper to be bound. It is an object to provide a clinch mechanism of.

[0005]

In order to solve the above-mentioned problems, the clinch mechanism in the stapler according to the present invention comprises:
A driver including a base member having a movable clincher that bends the legs of staples along the back surface of the material to be stapled, an operating member that operates the movable clincher, and a magazine that is loaded with the staples and that ejects the staples at the forefront. An operation handle is provided that includes a frame member that is vertically movable and rotatably supported by the base member, and an operation handle that is vertically movable. The operation handle and the frame member include an operation handle. In a clinch mechanism provided with an operating mechanism that operates the driver in conjunction with the downward movement of the driver and a link mechanism that operates the operating member of the movable clincher, the driver operating mechanism is provided in the first half of the downward movement of the operating handle. Is operated until just before reaching bottom dead center, and the link mechanism is created in the latter half of the movement of the operation handle. The movable clincher is actuated by the actuating member, and a drive link that engages with the actuating member is arranged in the link mechanism, and until the frame member contacts the upper surface of the material to be bound. In addition, a paper thickness adjusting mechanism is provided to prevent the actuating member from operating regardless of the paper thickness.

In the paper thickness adjusting mechanism, the links are loosely connected by the long holes and the pins, and the shaft of the frame member and the link mechanism are engaged with the operating member regardless of the paper thickness. May be made close to each other, or the displacement of the link mechanism due to the thickness of the paper may be replaced with the displacement along the engagement surface of the actuating member.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows a desk-type stapler. Reference numeral 1 is a base member, 2 is a frame member, and 3 is a frame member.
Indicates an operation handle.

A binding table 5 is formed in the upper part of the substantially middle portion of the base member 1, and a pair of movable clincher 7 is rotated around a shaft 8 (see FIG. 5) on a support plate 6 arranged below the binding plate 5. It is arranged freely. Standing walls 9 are formed on both sides of the front portion of the base member 1 so as to project therefrom.

The intermediate portion of the actuating member 10 is rotatably supported by the shaft 11 on the base member 1, and the rear end 10a thereof is formed so as to rotate the movable clincher 7 during the rotation.

A projecting piece 12 is projected below both front portions of the frame member 2 and is rotatably supported with respect to the base member 1 by a support shaft 13 penetrating the projecting piece 12 and is supported by a spring 14. It is always biased to rotate upward. Further, inside the frame member 2, staples s
There is provided a magazine unit 15 that can be loaded. Further, the driver 1 is provided at the rear end of the frame member 2.
6 and its holder 17 are guided and held so as to be slidable up and down. In addition, at the upper and lower portions of the rear end of the magazine unit 15, an ejection port 17 for ejecting the staple s at the rear end is formed together with the driver 16.

The operation handle 3 is rotatably supported with respect to the base member 1 by a support shaft 18 penetrating the standing wall 9 of the base member 1, and is always rotated upward with respect to the frame member 2 by a spring 19. Energized to move.

Next, the operation handle 3 and the frame member 2 are provided with an operating mechanism for operating the driver 16 and a link mechanism for operating the operating member 10 of the movable clincher 7.

The driver operating mechanism is constructed as follows. First, as shown in FIGS. 1 and 6, a sliding groove 22 is formed in the vertical direction on the front portion of the spring receiver 21 of the spring 19 of the frame member 2. On both side walls of the sliding groove 22, a Z-shaped first guide groove 25 is formed by connecting an upper groove portion 25a and a lower groove portion 25b formed in the vertical direction with an inclined groove portion 25c. An operating pin 26 is slidably engaged with the first guide groove 25.

A driver holder 17 is vertically slidably guided and held in the sliding groove of the frame member 2.
The driver holder 17 is formed in a U-shape in cross section, holds the driver 16 in a central piece, and has a second straight guide groove 27 in the front-rear direction formed in a side piece. The operation pin 26 is also slidably engaged with the second guide groove 27.

A long hole 39 is formed in the side wall of the intermediate portion of the operation handle 3, and an actuating means 29 of the driver 16 is connected to the engaging shaft 28 engaged with the long hole 39. The actuating means 29 is also formed in a U-shaped cross section, and is held in the sliding groove of the frame member 2 so as to be vertically slidable. Then, on the side piece of the actuating means 29, a J-shaped third guide groove 30 which is formed by connecting the vertical groove portion 30a and the inclined groove portion 30b in the vertical direction to each other is formed. The operating pin 26 is slidably engaged.

The link mechanism comprises a first link 33 and a second link 34 which are respectively supported by a first rotating shaft 31 and a second rotating shaft 32 provided on the side wall of the frame member 2. Has been done. The long hole 3 is provided at one end of the second link 34.
5, a shaft 36 provided at one end of the first link 33 engages with this long hole 35, and thereby both links are connected to each other. Furthermore, the above-mentioned first link 33
33a is provided so as to be engageable with the engagement shaft 28 of the operation handle 3, and the operation shaft 37 is provided at the other end of the second link 34.
Is provided, and the shaft 37 is connected to the front end 10 of the operating member 10.
It is provided so that it can be engaged with the upper part of b.

According to the above-mentioned mechanism, when the operation handle 3 is rotated, the operation handle 3 and the frame are held until the magazine unit 15 comes into contact with the bound paper P on the binding table 5 due to the resistance between members, as shown in FIG. It rotates downward while maintaining the same relative positional relationship with the member 2. By this rotation, the first link 33 and the second link 34 are displaced downward,
The elongated hole 35 is formed in a shape that allows the shaft 36 to escape so as to prevent the actuating member 10 from rotating in response to the downward displacement.
This constitutes a paper thickness adjusting mechanism. As a result, when the operation handle 3 is further rotated as shown in FIG. 3 after the magazine unit 15 comes into contact with the paper P to be bound, the frame member 2 does not move, but the actuating means 29 moves downward. At this time, the operating pin 26 is guided by the upper groove portion 25a of the first guide groove 25 and moves downward as shown in FIG. 7A, so that the driver holder 17 also moves downward and the driver 1
A leg portion of the staple s 6 allows the stapled paper P to pass therethrough.
Then, the operating pin 26 reaches the inclined groove portion 25c of the first guide groove 25 as shown in FIG. 7 (b). When the operating pin 26 reaches the inclined groove portion 25 c of the first guide groove 25, the inclined groove portion 25
Since c and the inclined groove portion 30b of the third guide groove 30 intersect, the operating pin 26 is guided by the inclined groove portion 25c, the inclined groove portion 30b, and the second guide groove 27 to move to the right side in the drawing. After that, when the operating pin 26 reaches the moving end as shown in FIG. 6C and engages with the vertical groove portion 30a of the third guide groove 30 of the operating means 29, the operating means 29 is moved downward as shown in FIG. Even if moved, the operating pin 26 moves along the vertical groove portion 30a and escapes, so that the driver holder 17 and the driver 16 remain stopped. At this time, the driver holder 17 is set so that it is just before reaching the bottom dead center. The stopped state continues until the operating pin 26 engages with the upper end of the vertical groove portion 30a immediately before reaching the bottom dead center of the operating handle 3, and then the operating handle 3 again.
By the remaining downward movement of the actuator, the operating pin 26 and the driver holder 17 are moved downward together with the operating means 29 (see FIG.
(e).)

As described above, when the operation handle 3 is moved downward, the first half of the movement causes the driver 16 to temporarily stop immediately before the driver holder 17 reaches the bottom dead center.

Thereafter, when the operating handle 3 is moved further downward, the engaging shaft 28 of the operating handle 3 engages with the end portion of the first link 33 of the link mechanism during the latter half operation as shown in FIG. Push it down, so the first link 3
3 rotates about the first rotation shaft 31 to move the second link 3
4 is rotated about the second rotation shaft 32. further,
The operating shaft 37 at the end of the operating member 10 engages with and pushes down the front end 10b of the operating member 10 of the base member 1, so that the operating member 10
Rotates about the shaft 11, and the rear end 10a pushes up the movable clincher 7 to rotate it, and bends the leg portion of the staple s penetrating the stapled paper P (see FIG. 5 (b)).

Finally, the driver 16 moves to the bottom dead center and presses the staples s downward to ensure the bending and complete the binding. When the operation handle 3 is released after the spelling is completed, the frame members 2 and the operation handle 3 are moved upward by the springs 14 and 19.

As described above, since the stapling operation can be performed without vertically moving the movable clincher 7 portion such as the support plate 6, there is no inconvenience that the center of the stapled paper P rises.

Next, as described above, the second link 3
A paper thickness adjusting mechanism is configured by providing a portion where the operation shaft 37 of the end portion of No. 4 engages with the front end 10b of the operation member 10 below the support shaft 13 which is the rotation support point of the frame member 2. , The splicing reaction force of the staples s from the driver 16 and the clincher 7 on a line substantially parallel to the line of action connecting the driver 16 and the clincher 7, and the support shaft 13 and the operating shaft 37.
And will receive. In this way, the pressing force from the operation handle 3 is structured to most efficiently perform the stapling action of the staples s.

As shown in FIGS. 1 and 2, the first rotary shaft 31 of the first link 33 and the second rotary shaft 32 of the second link 34 are provided on the frame member 2 and When the member 2 comes into contact with the surface of the paper to be bound P, the inclination of the frame member 2 with respect to the base member 1 differs depending on the thickness of the paper to be bound P, so the base members of the first and second rotating shafts 31 and 32 are different. The position with respect to 1 also differs depending on the thickness of the paper P to be bound. If the positions of the first and second rotating shafts 31 and 32 are different, the position of the actuating shaft 37 of the second link 34 is also different, so that the timing of actuating the movable clincher 7 is also deviated, resulting in spelling failure. Cause of.

However, as is clear from the comparison between FIG. 2 and FIG. 4, the bound paper P shown in FIG. 4 is thinner than that shown in FIG. 2, but the spindle 13 of the frame member 2 does not have the bound paper. It does not move regardless of the thickness of P. And
As described above, the portion where the actuating shaft 37 of the second link 34 engages with the front end 10b of the actuating member 10 is the frame member 2 described above.
Since it is provided close to the support shaft 13, the position of the above-mentioned engaging portion hardly changes depending on the thickness of the paper P to be bound. Therefore, the operation timings of the driver 16 and the movable clincher 7 can be kept constant regardless of the thickness of the bound paper P.

Next, FIG. 8 shows another example of the paper thickness adjusting mechanism. The substantially intermediate portion of the operating member 10 is rotatably supported on the side wall of the base member 1 as in the above-mentioned example. Also,
The link mechanism includes a first rotary shaft 40 provided on the side wall of the frame member 2 and a second rotary shaft 41 provided on the base member 1 and a first rotary shaft 42 and a second rotary shaft 41 respectively supported by the second rotary shaft 41.
Link 43 of the above.

One end of the first link 42 is provided so as to be engageable with the engagement shaft 28 of the operation handle 3, and the other end thereof is provided with an actuating shaft 44, and the actuating shaft 44 is the second link 43. Is engaged with the rear end surface of the upper part of the. The front portion of the second link 43 is connected to the front end 10b of the operating member 10 of the base member 1 by the connecting shaft 3
8 are connected.

In the case of this example as well, the engaging shaft 28 of the operating handle 3 engages with the end portion of the first link 42 immediately before the driver 16 reaches the bottom dead center.

According to the above construction, although not described with reference to the drawings, when the operating handle 3 is rotated, the driver operating mechanism (same as the above-mentioned example) operates in the first half of the movement,
Similarly to the above, the driver 16 penetrates the paper P to be bound and operates the driver 16 until just before reaching the bottom dead center. After that, in the latter half of the movement of the operation handle 3, the engagement shaft 28 of the operation handle 3 engages with the end portion of the first link 42 of the link mechanism and pushes it down, so that the first link 4
2 rotates about the first rotation shaft 40, and the actuation shaft 44 pushes the end surface of the second link 43 to rotate it around the second rotation shaft 41. Further, the shaft 38 at the end thereof rotates the operating member 10 about the shaft 11. Next, the end portion pushes up the movable clincher 7 to rotate the movable clincher 7, and the leg portion of the staple penetrating the stapled paper P is bent. Finally, the driver 16 moves to the bottom dead center and presses the staples downward to ensure the bending and complete the spelling.

By the way, the first rotating shaft 40 of the first link 42 is provided on the frame member 2, and when the frame member 2 comes into contact with the surface of the paper P to be bound, the frame member 2 is relative to the base member 1. Since the inclination differs depending on the thickness of the paper P to be bound, it is obvious from the comparison between FIG. 9 and FIG.
The position of the rotating shaft 40 with respect to the base member 1 also differs depending on the thickness of the paper P to be bound. If the position of the first rotating shaft 40 is different, the timing for operating the movable clincher 7 will also be shifted.

However, the first link 4 which moves along with the transition from the case where the paper P to be bound is thick to the case where it is thin.
If the end face of the second link 43 is formed so as to coincide with the movement locus of the second operation shaft 44, the second link 43 moves regardless of the thickness of the paper P to be bound by this paper thickness adjusting mechanism. Never. Therefore, as shown in FIG. 11, the operation timing of the operation member 10 based on the operation of the first link 42 and the second link 43 is almost the same regardless of the thickness of the paper P to be bound, and good binding is always performed. can get.

Next, FIG. 12 shows still another example of the actuating member 10 of the movable clincher 7 and the link mechanism for driving the actuating member 10. The actuating member 10 is rotatable on the side wall of the base member 1 at its front portion. It is composed of a supported first operating member 10A and a second operating member 10B provided with a roller 51 rolling on the lower surface of the first operating member 10A and slidably provided in the front-rear direction. . In addition, the link mechanism includes a first rotating shaft 45 provided on the side wall of the frame member 2.
And a second link 48 supported by the second rotary shaft 46, respectively.
One end of is provided so as to be engageable with the engagement shaft 28 of the operation handle 3. The first link 47 and the second link 48 are connected by engaging the shaft 49 with the slot 50. The end 48a of the second link 48 is engaged with the front end 10c of the second actuating member 10B of the base member 1.
When the operation handle 3 moves downward, the first
The shaft 49 of the link 47 moves along the long hole 50 of the second link 48, and when the second link 48 tilts, its end 48a moves along the front end 10c of the actuating member 10. Has been formed. The second link 4
Reference numeral 8 is formed so as to escape downward from the opening 52 at the bottom of the base member 1.

According to the above-mentioned structure, although not described with reference to the drawings, when the operation handle 3 is rotated, the driver operating mechanism (same as the example of FIG. 1) operates in the first half of the movement,
Similarly to the above, the driver 16 penetrates the paper P to be bound and operates the driver 16 until just before reaching the bottom dead center. After that, in the latter half of the movement of the operation handle 3, the engagement shaft 28 of the operation handle 3 engages with the end portion of the first link 47 of the link mechanism and pushes it down, so that the first link 47.
Rotates clockwise, which causes the second link 48
Rotates counterclockwise to move the second actuating member 10B forward, and the roller 51 at the tip turns the first actuating member 10A, and the tip thereof moves to the movable clincher 7C.
Is rotated to bend the leg portion of the staple penetrating the paper P to be bound. Finally, the driver 16 moves to the bottom dead center and presses the staples downward to ensure the bending and complete the spelling.

By the way, since the position of the first rotating shaft 45 and the position of the second rotating shaft 46 differ depending on the thickness of the paper to be bound P, the link mechanism is also displaced. However, Figure 1
3, the first link 4 as is clear from the comparison of FIG.
The shaft 49 of 7 moves along the long hole 50 of the second link 48, and when the second link 48 tilts, its lower surface slides along the front end portion 10c of the second actuating member 10B,
The end 48a of the second link 48 and the second actuating member 10B
The contact state with the front end portion 10c is formed to be retained. Therefore, the timing of operating the operating member 10 is almost the same regardless of the paper thickness.

The movable clincher is not limited to the one having a structure in which a pair of movable clincher is rotated as shown in the above example. For example, as in the movable clincher 7a shown in FIG. 15, a clincher groove 53 may be formed on the upper surface and provided so as to be movable up and down, and the clincher groove 53 may be moved up and down by the operating member 10 having the same configuration as the above-described example.

[0035]

The amount of movement of the operation handle and the frame member until the frame member comes into contact with the upper surface of the paper to be bound varies depending on the thickness of the paper to be bound, but the operating member operates regardless of the size of the paper. Since a paper thickness adjusting mechanism is provided to prevent the above, the operation timing of operating the driver operating mechanism and the link mechanism by moving the operation handle further downward can be kept constant regardless of the thickness of the paper to be bound. It is possible and always obtains good spelling.

Further, since the stapling operation is performed with respect to the base member without the clincher being operated, the binding state of the sheets to be bound is good.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a cross section of a stapler including a clinch mechanism according to the present invention.

FIG. 2 is an explanatory view of a state in which a frame member is brought into contact with a thick sheet to be bound.

FIG. 3 is an explanatory view of an operation mode of the driver operation mechanism of the stapler

FIG. 4 is an explanatory view of a state in which a frame member is brought into contact with thin paper to be bound.

5 (a) and (b) are explanatory views of an operation mode of a movable clincher.

FIG. 6 is an exploded view of a driver operating mechanism.

7 (a), (b), (c), (d), and (e) are explanatory views of an operation mode of the driver operation mechanism.

FIG. 8 is a sectional view showing another example of the paper thickness adjusting mechanism.

FIG. 9 is a cross-sectional view showing a state in which a frame member is brought into contact with a thick sheet to be bound.

FIG. 10 is a cross-sectional view showing a state in which a frame member is brought into contact with thin paper to be bound.

FIG. 11 is an operation comparison diagram of the link mechanism depending on the thickness of the paper.

FIG. 12 is a sectional view showing still another example of the paper thickness adjusting mechanism.

FIG. 13 is a cross-sectional view of a thick sheet to be bound with a frame member.

FIG. 14 is a cross-sectional view showing a state in which a frame member is brought into contact with thin paper to be bound.

FIG. 15 is a perspective view of another example of the movable clincher.

FIG. 16 is a cross-sectional view that briefly shows a bound state of a stapled sheet by a conventional stapler.

[Explanation of symbols]

 s Staple 1 Base member 2 Frame member 3 Operating handle 7 Movable clincher 10 Actuating member 16 Driver

Claims (1)

[Claims] 1. A base member having a movable clincher for bending leg portions of staples along a back surface of a material to be stapled, an actuating member for actuating the movable clincher, a magazine loaded with the staples, and a front member. The operation handle and the frame member are provided with a frame member that guides a driver for ejecting staples so as to be movable up and down and is rotatably supported with respect to the base member, and an operation handle that is vertically movable. In the clinch mechanism provided with an operating mechanism that operates the driver in conjunction with the downward movement of the operating handle and a link mechanism that activates the operating member of the movable clincher, in the first half of the downward movement of the operating handle. Operate the driver operating mechanism until just before the driver reaches bottom dead center,
In the latter half of the movement of the operation handle, the link mechanism is operated to operate the movable clincher by the operation member, and the paper thickness is small or small until the frame member comes into contact with the upper surface of the material to be bound. A clinch mechanism for a stapler, further comprising a paper thickness adjusting mechanism for preventing the actuating member from operating.