JPS6343028Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is a paper thickness adjustment device for staplers,
More specifically, the present invention relates to a paper thickness adjusting device in a stapler that uses a link mechanism to drive a drive means for driving a U-shaped staple into a bound paper material.

(Prior Art) Generally, a stapler is configured to supply staples to the lower part of a drive means provided in a magazine so as to be movable up and down, and the drive means is driven to drive the staples into the paper material on the binding base. When a normal link mechanism is employed as the drive mechanism of the drive means, the stroke amount of the drive means is fixed. However, since the thickness of the paper material on the binding table varies depending on the number of sheets to be bound, the stroke of the drive means must also be adjusted according to this thickness. Furthermore, if the stroke of the drive means is fixed, if an abnormal load is applied to the drive means, such as when the drive means is driven when a steel member is caught on the binding table for some reason, The motor may lock up.

(Technical problem of the invention) In view of the above-mentioned circumstances, this invention makes it possible to adjust the phase of the operating stroke of the drive means, especially when the drive means is driven by a link mechanism. Paper thickness adjustment in a stapler that allows smooth binding at all times in response to differences in paper thickness, and prevents the drive motor from locking up even if the drive means is driven onto an iron plate, etc. due to a defective side. The technical challenge is to propose a device.

(Means for Solving the Problems) In order to solve the above problems, the paper thickness adjustment device for the stapler according to this invention includes a drive means for driving U-shaped staples into the binding material on the binding table of the main body of the stapler. In the stapler which drives the staple by the drive means, the stapler body is provided with a drive link for the drive means and a link opposite to the link and linked to the drive means, and a link between the two links is provided. The present invention is characterized in that a spring for adjusting paper thickness is interposed, and the driving means operates both links to drive the driving means.

(Operation and effect of the invention) According to this invention, the driving force of the drive means is transmitted from the drive means link to the drive means link to drive the drive means, but the paper thickness is adjusted between the two links. Since a spring is interposed therebetween, the phase of the operating stroke of the drive means driven by the link can be adjusted by the amount of expansion and contraction of the spring. Therefore, when the drive means drives staples into the binding paper material on the binding table of the stapler main body, even if this paper material is thick or has a different thickness, the paper thickness or the paper thickness difference is applied to the spring. It is then absorbed. Therefore, the spelling operation can be performed smoothly. Of course, even if an iron plate or the like gets stuck between the binding board and the drive means and the machine is operated without knowing, the drive motor will not lock up.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

In the figure, reference numeral 1 indicates the base of the stapler.
A binding table 12 on which binding paper materials 8 are placed is provided at the tip of the base 1. On the other hand, a holder 27 is provided in the magazine 2 so as to be movable up and down, and a plate-shaped drive means 7 is held in the holder 27, and the staples 3 are supplied to the lower part of the drive means 7. ing. When the drive means 7 moves downward, the staples 3 are driven into the paper material 8 on the binding base 12, thereby performing binding. When the drive means 7 moves upward, a new staple 3 is supplied to its lower part, and the next binding is prepared.

The vertical movement of the drive means 7 is driven by a link mechanism linked to a drive device.

As shown in FIGS. 1 and 2, the drive device includes reduction gears 48, 49, and 49 for meshing the rotational force of the drive motor 9 with the rotating shaft 9a of the drive motor 9.
50, the transmission is transmitted to a link mechanism linked to the drive rod 29 provided on the holder 27. A cam 52 is fixed to both ends of the drive shaft 51 of the last reduction gear 50, and this cam 52 It is connected to the link mechanism.

The link mechanism is a drive rod 29 provided on the holder 27.
A pair of L-shaped links 54, 54 linked to each other via connection links 53, 53 at both ends of the motor link 55 linked to the drive device via the cam 52 are connected via a compression spring 63 for position adjustment. It is constructed by connecting. Each L-shaped link 54,
The center portion of each member 54 is pivotally attached to the side plate 56 of the base 1, and one end thereof is connected to the connecting links 53, 53, and the other end thereof is connected by a connecting link 57. The motor link 55 is formed in a U-shape,
Both ends are linked to a cam 52 of a drive shaft 51. In addition, the connecting link 57 and the motor link 55
are connected by a connecting bolt 60, and the connecting bolt 60 is provided with two receiving plates 61 and 62 between the connecting link 57 and the motor link 55.
The compression spring 63 is interposed between the receiving plate 61 and the other receiving plate 62, and a spring pressure adjusting nut 64 and a phase adjusting nut 65 are screwed between the receiving plate 61 and the other receiving plate 62.

Therefore, when the drive motor 9 rotates, the rotational force is transmitted to the drive shaft 51, the cam 52 rotates, the motor link 55 reciprocates in the front and back direction, and the motor link 5
Since the L-shaped link 54 connected to the connecting link 53 swings around the pivot shaft 58, this swinging movement is caused by the connecting link 53
In this way, the drive rod 29 provided on the holder 27 reciprocates up and down, and the holder 27 and the drive means 7 are driven up and down as described above. The drive shaft 51 is 1
When rotated, the holder 27 reciprocates up and down once.

By the way, the motor link 55 and the connecting link 5
Since a compression spring 63 is provided between the drive means 7 and the link mechanism, a part of the operating stroke of the drive means 7 obtained by the link mechanism is absorbed by the compression spring 63, and the phase of the operating stroke is changed from the above. It can be adjusted by the amount of expansion and contraction of the compression spring 63. Therefore, when the drive means 7 drives the staple 3 into the binding paper material 8 on the binding board 12 of the stapler main body, even if the thickness of the paper material 8 differs, the difference in paper thickness is compensated for by the compression spring 63. It gets absorbed. Therefore, the spelling operation can be performed smoothly. Of course, even if the binding board and the drive means 7 are operated without knowing that an iron plate or the like has gotten into them for some reason, the drive motor will not lock up.

The torque of the drive motor 9 is set to such an extent that it can withstand the load applied during abnormal conditions, and the spring pressure of the compression spring 63 is set so that at least the maximum amount of deflection is obtained when the motor torque reaches its maximum. In this case, the drive motor 9 will not be locked even if a load on the opposite side is applied to the drive means 7. The spring pressure of the compression spring 63 can be easily adjusted by turning the spring pressure adjusting nut 64.

Further, by turning the phase adjustment screw 65, the distance between the motor link 55 and the connecting link 57 can be adjusted, so the stroke phase of the drive means 7 can be adjusted. That is, as shown in FIG. 4, the motor link 55 and the connecting link 5
7, the L-shaped link 54 rotates by that amount, the phase of the stroke is adjusted by h, and the position of the holder 27 is lowered. Conversely, if the above-mentioned interval is made smaller, the position of the holder 27 will be raised, so that the phase of the stroke of the drive means 7 can be easily adjusted. As mentioned above, when the drive means is driven by a link mechanism, the stroke phase of the drive means is often different from the design due to the link length, the dimensions between the link and the pin, the gap, etc., and the stroke is changed by the error. Although it is necessary to adjust the phase of the paper, it is possible to absorb errors in member dimensions, etc. by the above adjustment, and to maintain good spelling performance at all times.

[Brief explanation of the drawing]

Fig. 1 is a side view of the paper thickness adjusting device in the stapler according to this invention, Fig. 2 is a schematic view of the main parts of the paper thickness adjusting device seen from above, and Fig. 3 is a partial perspective view of the link mechanism. FIG. 4 is an explanatory diagram of phase adjustment of the operating stroke. Code 1: stapler base, 3: staple, 7: drive means, 8: binding paper material, 9
... Drive motor, 51 ... Drive shaft, 52 ... Cam, 53 ... Connection link, 54 ... L-shaped link,
55...Motor link, 57...Connection link,
61, 62...Reception plate, 63...Compression spring, 64
...Spring pressure adjustment nut, 65...Phase adjustment nut.

Claims (1)

[Scope of utility model registration request] The stapler is provided with a drive means for driving U-shaped staples into the binding material on the binding base of the stapler main body, and the staple is driven by the drive means. A link facing the link and linked to the driving means is provided, and
A paper thickness adjusting device for a stapler, characterized in that a spring for paper thickness adjustment is interposed between the two links, and the drive means operates both the links and drives the drive means.