JPH0970767A - Operating mechanism of movable clincher of stapler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a movable clincher closed without needing any special parts. SOLUTION: An operating mechanism of a movable clincher consists of an operating member 9 which is arranged on a base member 1 and provided in a movable manner at a first position to close a movable clincher 6 and a second position to open the movable clincher 6, and a link mechanism to move the operating member 9 from the second position to the first position in an interlocking manner with the downward movement of an operation handle 3. When a frame member 2 is in the upper position, the link mechanism is at the position to move the operating member 9 to the first position side. When the frame member 2 is moved downward, the link mechanism is at the position to allow the operating member 9 to be moved to the second position side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable clincher operating mechanism for bending a leg portion of a staple having a stapled material penetrating therethrough 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.

By the way, in such a clinching method using a movable clincher, since the movable clincher is normally open, staples may enter the space between the opened movable clincher, obstructing the rotation of the clincher and causing spelling failure. There is. Therefore, it is known that a clincher receiver is arranged under the clincher, and a mechanism is adopted that pushes it up by a spring to urge the clincher to always close.

[0004]

However, the above-mentioned mechanism requires a member such as a clincher receiver and a spring to close the clincher, and thus has a problem of high cost.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide an operating mechanism for a movable clincher of a stapler that can keep the movable clincher closed without requiring any special parts.

[0006]

In order to solve the above-mentioned problems, an operating mechanism for a movable clincher of a stapler according to the present invention opens and closes a pair of movable clincher that bends a leg portion of a staple along a back surface of a material to be stapled. A driver holder that includes a base member movably arranged and a magazine in which the staples are loaded and that drives out the staples at the forefront is movably supported and is rotatably supported with respect to the base member. A frame member, an operation handle which is provided so as to be movable up and down, and which drives the driver downward when rotating to eject the staple at the forefront, and a clincher operation mechanism for operating the movable clincher. In the stapler that drives the driver holder and the clincher actuating mechanism in conjunction with the movement of the clincher, An actuating mechanism disposed on the base member and movably provided to a first position for bending the movable clincher with respect to the staple and a movable clincher to a second position free of the staple; And a link mechanism for moving the operating member from the second position to the first position in conjunction with the downward movement of the operation handle, and when the frame member is in the upper position, the link mechanism. Is in a position to move the actuating means to the first position side, and when the frame member moves downward, the link mechanism is in a position to allow the actuating means to move to the second position side. It is characterized by having done.

[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 4 is formed in the upper part of the substantially middle portion of the base member 1, and a pair of movable clincher 6 is provided with a support shaft 7 (see FIG. 4 (a)) on a support plate 5 arranged below the binding plate 4. It is arranged so that it can be rotated and opened and closed at the center. A standing wall 8 is formed on the front portion of the base member 1 so as to project therefrom. The base member 1
An operating member 9 to be described later is provided in the.

A supporting piece 10 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 11 penetrating the supporting piece 10 and by a spring 13. It is always biased to rotate upward. Further, inside the frame member 2, a magazine unit 14 formed so that staples s can be loaded is provided. At the upper and lower portions of the front end of the magazine unit 14, an ejection port 16 for ejecting the staple at the front end is formed together with the driver 15.

A spring bearing 12 of a spring 23 is formed on the rear portion of the frame member 2, and a front portion of the spring bearing 12 is shown in FIG.
A wall 17 having a U-shaped cross section that forms the sliding groove shown in is integrally provided. The U-shaped wall 17 has an upper groove portion 18a and a lower groove portion 18b formed in the vertical direction, and the inclined groove portion 18
A Z-shaped first guide groove 18 connected by c is formed. An operating pin 19 is slidably engaged with the first guide groove 18.

The driver holder 20 is provided in the sliding groove.
Is held slidably up and down. The driver holder 20 is formed in a U-shape in cross section. The central piece 20a holds the driver 15 and the side piece 20b is formed with a second guide groove 21 which is straight in the front-rear direction. The operation pin 19 is also slidably engaged with the second guide groove 21.

The operation handle 3 is rotatably supported with respect to the base member 1 by a support shaft 22 penetrating the standing wall 8 of the base member 1, and is constantly framed by a spring 23 provided on the spring receiver 12. It is biased to rotate upward with respect to the member 2. Further, a long hole 24 is formed in the side wall of the intermediate portion of the operation handle 3, and an operating shaft 26 of the driver 15 is connected to an engaging shaft 25 engaged with the long hole 24. The actuating means 26 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 slidable up and down. Then, as shown in FIG. 5, the side piece 27 of the actuating means 26 is provided with a J-shaped third guide groove 28 in which a vertical groove portion 28a and an inclined groove portion 28b in the vertical direction are continuously formed. The operation pin 19 is slidably engaged with the guide groove 28 of No. 3 as well.

The sliding groove of the frame member 2, the driver holder 20 and the operating means 26 of the operating handle 3 constitute a driver operating mechanism.

Next, the stapler is provided with an operating mechanism for operating the movable clincher 6. This clincher actuating mechanism is interlocked with the movement of the link-like actuating member 9 whose center is rotatably pivotally attached to the base member 1 and whose rear end 9a is arranged below the movable clincher 6 and the operating handle 3. It is composed of a link mechanism.

The actuating member 9 rotates around the protrusion 37 to close the movable clincher 6 (bending operation with respect to the staple) at the first position (FIG. 1, FIG. 3, FIG. 4 (b)).
Position) and the second position for opening the movable clincher 6 (free for staples) (positions in FIGS. 2 and 4 (a))
It is provided so that it can be moved.

As shown in FIG. 1, the link mechanism includes a first rotating shaft 30 provided on the side wall of the frame member 2.
And a second rotary shaft 31 provided on the base member 1, each of which has an intermediate portion supported by a first link 32 and a second link 33. One end portion 34 of the first link 32 is provided so as to be engageable with the lower portion of the operation handle 3, and the other end portion 35 is provided with an operating shaft 36. Also, the second
One end portion (upper end portion) of the link 33 is formed in a hook shape protruding rearward to form a protrusion 37, and the other end portion (lower end portion) of the connecting shaft 3 is formed.
8 is fixed and penetrates and is connected to the opening 40 of the operating member 9.

In the state in which the spelling is not performed, the frame member 2 is at the upper position as shown in FIG.
The operating shaft 36 pushes up the lower surface of the protrusion 37 of the second link 33 to rotate the second link 33 counterclockwise, whereby the operating member 9 resists the spring bias and moves to the first position. It is held at (the position where the movable clincher 6 is closed).

According to the above construction, when the operation handle 3 is rotated, the operation handle 3 and the frame member 2 are separated from each other until the magazine unit 14 comes into contact with the paper P to be bound by the resistance between members as shown in FIG. Rotate downward while maintaining the same relative positional relationship. By this rotation, the operating shaft 36 moves downward together with the first link 32 of the link mechanism, so that the second link 33 rotates counterclockwise and the connecting shaft 3
Since the front end 9b of the operating member 9 engaged with 8 moves upward, the rear end 9a moves downward, the operating member 9 rotates to the second position, and the movable clincher 6 is opened.

When the operation handle 3 is further rotated as shown in FIG. 3 after the magazine unit 14 contacts the paper P to be bound, the frame member 2 does not move, but the operating means 26
Moves down. At this time, the operating pin 19 is moved to
As it moves downward by being guided by the upper groove portion 18a of FIG.
As shown in (a), the driver holder 20 also moves downward, and the driver 15 causes the legs of the staple s to penetrate the stapled paper P. Then, the operating pin 19 reaches the inclined groove portion 18c of the first guide groove 18. When the operating pin 19 reaches the inclined groove portion 18c of the first guide groove 18, the inclined groove portion 18c intersects with the inclined groove portion 28b of the third guide groove 28.
As shown in (b), the operating pin 19 is guided by the inclined groove portion 18c, the inclined groove portion 28b, and the second guide groove 21 to move to the right side in the drawing. The operating pin 19 reaches the front moving end as shown in FIG. 7C, and the vertical groove 28a of the third guide groove 28 of the operating means 26 is reached.
When the vehicle enters, the operating pin 19 moves along the vertical groove 28a and escapes even if the operating means 26 is moved downward as shown in FIG. 8D, so that the driver 15 remains stopped. At this time, the driver holder 20 is set to be just before reaching the bottom dead center. The stopped state of the operating pin 19 continues to this point. It is set so as to engage with the upper end of the vertical groove portion 28a immediately before reaching the bottom dead center of the operation handle 3. As a result, the operating pin 19 moves downward together with the operating means 26 again immediately before the moving end of the operating handle 3 (see FIG.
(See (e)), the driver 15 also moves downward.

As described above, while the operation handle 3 is being moved downward, the driver 15 is temporarily stopped immediately before reaching the bottom dead center. Then, while in the standby state, as shown in FIG. 3, the engagement shaft 25 of the operation handle 3 engages with the one end portion 34 of the first link 32 and is interlocked with the downward movement of the second half of the operation handle 3, The operating mechanism of the movable clincher 6 is set to operate. Accordingly, in the latter half of the movement of the operation handle 3, the engagement shaft 25 of the operation handle 3 engages with and pushes down the end portion of the first link 32 of the link mechanism, so that the first link 32 moves to the first position. Since the shaft 36 pushes the rear end surface of the second link 33 by turning clockwise about the turning shaft 30 to turn the link 33 counterclockwise around the second turning shaft 31, The connecting shaft 38 at the end of the base member 1 rotates the operating member 9 so that the operating member 9 of the base member 1 rotates about the shaft 39 toward the first position, and the rear end 9a thereof moves the movable clincher 6 to the position shown in FIG. As shown in b), it is pushed up and rotated (closed), and the leg portion of the staple s penetrating the paper P to be bound is bent.

Finally, since the operating pin 19 of the driver operating mechanism is engaged with the upper end of the vertical groove portion 28a of the third guide groove 28 as shown in FIG. 6 (e) immediately before reaching the bottom dead center of the operating handle 3, The driver 15 moves to the bottom dead center and presses the staples downward, ensuring the bending and completing the binding.

When the operating handle 3 is rotated upward after binding, the driver operating mechanism and the clincher operating mechanism are returned to their original states, and the operating member 9 is held in the first position (position where the movable clincher 6 is closed) again. To be done.

As described above, the movable clincher 6 is opened only when the frame member 2 hits the upper surface of the paper P to be bound at the time of binding, and is normally closed, so that the staples are inserted between the movable clincher 6. Therefore, there is no possibility of obstructing the rotation of the clincher 6.

Moreover, since the above-mentioned mechanism does not require any special component or mechanism for closing the clincher 6, the cost can be kept low.

The link mechanism may have any other structure as long as it can rotate the operating member 9.

Further, the movable clincher is not limited to the one having a structure in which a pair of movable clincher as shown in the above example is rotated to open and close. For example, as in the movable clincher 6a shown in FIG. 7, a clincher groove 40 is formed on the upper surface and is provided so as to be vertically movable, and is vertically moved by the actuating member 9 having the same configuration as that of the above-described example. The bending operation may be moved to a first position (upper position) and the movable clincher to a second position (lower position) free of staples.

[Brief description of drawings]

FIG. 1 is a sectional view of a stapler including an operating mechanism of a movable clincher according to the present invention.

FIG. 2 is an operation mode explanatory view of an operation mechanism of the movable clincher just before the spelling operation.

FIG. 3 is an operation mode explanatory diagram of an operation mechanism of a movable clincher at the time of bending a staple.

4 (a) and (b) are explanatory views of the open / closed state of the movable clincher.

FIG. 5 is an exploded view of a driver operating mechanism

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

FIG. 7 is a perspective view of another example of the movable clincher.

[Explanation of symbols]

 1 Base Member 2 Frame Member 3 Operation Handle 6 Movable Clincher 9 Actuating Member 15 Driver 20 Driver Holder

Claims (1)

[Claims] 1. A driver including a base member provided with a movable clincher for bending leg portions of staples along the back surface of a material to be bound, a driver holder of a driver having a magazine loaded with the staples and ejecting the staples at the forefront. A frame member that is vertically movably guided and rotatably supported with respect to the base member, and an operation handle that is vertically movably provided and that lowers a driver at the time of rotation to eject the staple at the forefront. A clincher actuating mechanism for actuating the movable clincher, and a stapler driving the driver holder and the clincher actuating mechanism in conjunction with a downward movement of the operating handle, wherein the clincher actuating mechanism is disposed on the base member. Position for moving the movable clincher by bending operation with respect to the staple and the movable clincher An actuating member which is movable in a second position of the free relative to the staple and catcher,
And a link mechanism for moving the operating member from the second position to the first position in conjunction with the downward movement of the operation handle, and when the frame member is in the upper position, the link mechanism. Is in a position to move the operating member to the first position side, and when the frame member moves downward, the link mechanism is in a position to allow the operating member to move to the second position side. The operation mechanism of the movable clincher of the stapler characterized by the above.