JPH01295769A - Stapler - Google Patents

Abstract

PURPOSE:To lessen gripping stroke and perform surely flat clinch by providing a second pressing portion to press a handle member, as soon as the leg of a staple extends through members to be filed while abutting against a clincer portion and beginning to be folded, in a position opposed to the handle member. CONSTITUTION:A lever member 4 is pivoted by a gripping operation to pivot a handle member 2 through a first pressing portion 36. A staple 29 loaded in a magazine unit 3 is driven out by a driver 31 along with such pivoting so that the leg of the staple extends through a member to be filled and the end of the leg abuts against a clincer portion 7 to fold the leg in the predetermined direction. Immediately after the beginning of the folding, a second press portion 40 provided on the end of a lever member abuts against the upper surface of the handle member. Thus, the pressing force to the handle member is changed over from the first to second pressing portion and thereafter the handle member is pressed by the second pressing portion to fold flatly the leg of the staple along the back of the member to be filed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a so-called flat clinch type stapler in which the legs of a stapler are folded flat along the back surface of a member to be stapled.

[Prior Art 1] Conventionally, in this type of stapler, first, a lever member is grasped to cause the legs of the staple to penetrate through the member to be bound, for example, a sheet of paper, and then, by further grasping the lever member, the legs of the staple penetrate the paper. The staple was folded in one section at a time, thereby folding the legs of the staple flat against the back side of the paper.

By the way, it is desirable that such a flat clinch type stapler has a small binding load, especially when it is used for a long time for business purposes or when used by children for crafts.

Conventionally, some staplers that reduce this binding load are equipped with a boosting mechanism that makes the gripping stroke twice the clinching stroke, thereby reducing the gripping force.

Therefore, by incorporating this boosting mechanism into the stapler, it is possible to realize a flat clinch type stapler in which the binding load is reduced.

[Problems to be Solved by the Invention] However, when a boosting mechanism is directly incorporated into a conventional flat clinch type stapler, the following problems arise.

That is, in a flat clinch type stapler, as mentioned above, the leg portion of the staple is first penetrated through the paper by grasping the lever member, and then the penetrating portion is bent at once. It is necessary to grasp the lever member, which makes the grasping stroke approximately twice that of a normal stapler. On the other hand, the boost mechanism has a gripping stroke that is approximately twice the clinch stroke, which is twice the gripping stroke of a normal stapler. Therefore, if the boosting mechanism is directly incorporated into a flat clinch type stapler, the gripping stroke will be approximately four times that of a normal stapler, which has the drawback of increasing the size of the stapler as a whole.

In addition, in flat clinch staplers,
In order to bend the paper-penetrating portion of the staple leg at once, a considerable speed or impact is required at that moment, but as the gripping stroke becomes longer as described above, the impact force becomes weaker. Therefore, there is a drawback that the bending operation of the legs of the staple, that is, the clinching is incomplete.

The present invention has been made in view of these problems, and is equipped with a boosting mechanism, which reduces the binding load, reduces the gripping stroke, and therefore allows miniaturization, and is suitable for flat clinch. The purpose is to provide a stapler that can obtain the necessary impact force.

[Means for Solving the Problems] In order to achieve the above object, the stapler according to the present invention has a clincher part for bending the legs of the staple at the rear end of the base, and a clincher part for bending the legs of the staple at the distal end. The rear ends of a handle member having a driver for bending staples and a magazine unit for loading staples are each pivoted, and the rear end of a lever member is pivoted on the tip side of the shaft fixing position of the base. , and further comprising a first pressing force applying portion that applies a pressing force to the handle member on the distal end side of the shaft fixing position of the lever member to rotate the handle member toward the base, and the lever By rotating the member around the shaft retaining portion, the driver is lowered together with the handle member to pass through the member to be stapled, which is the leg portion of the stapler, and then the lever member is further rotated to lower the driver together with the handle member. In a stapler that performs a stapling operation by bending the legs of a staple along the back side of the member to be stapled in the clincher part of the base, the tip of the lever member is placed at a position opposite to the handle member. A second pressing force applying section is provided, and the second pressing force is applied to the handle member immediately after the leg of the staple passes through the member to be stapled and comes into contact with the clincher section to start bending. The present invention is characterized in that the first pressing force applying section is switched to the second pressing force applying section.

[Operation 1] In the stapler according to the present invention with the above configuration, when the lever member is rotated by a grip operation after positioning the member to be bound between the clincher part and the driver, the first pressing force is applied together with the lever member. The handle member rotates through the applying section, and as a result, the driver drives out the staple loaded in the magazine unit, so that the leg of the staple penetrates the member to be stapled, and the tip of the leg of the staple enters the clincher section. , and each leg begins to bend in a predetermined direction. Immediately after this, the second pressing force applying part provided at the tip of the lever member comes into contact with the upper surface of the handle member, and as a result, the pressing force applied to the handle member is transferred from the first pressing force applying part to the second pressing force applying part. Switch to pressure applying section. If the lever member is further rotated from this state,
The handle member is pressed by the second pressing force applying section, and as a result, the driver and clincher section bend the legs of the staple flat along the back surface of the member to be stapled.

[Example] Hereinafter, an example of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing a flat clinch type stapler according to an embodiment of the present invention. In FIG. 1, ■ is a base made of hard synthetic resin, 2 is a handle member, and 3 is for loading staples. In the magazine unit 4, reference numeral 4 indicates a lever member on which a grip portion is formed.

The base 1 is composed of a bottom plate 5 having a downwardly curved surface and a support plate 6 horizontally disposed on the top surface of the bottom plate 5. A clincher portion 7 is provided perpendicularly to the support plate 6 at the tip of the base l. This clincher part 7
The upper surface has a guide inclined surface 7 for bending the legs of the staple.
a and 7b are formed.

Further, a base end portion of a holding member 9 is attached to the base l via a shaft portion 8 . A paper holder 10 is formed at the tip of the holding member 9, and the paper holder 10 is such that the binding member 1, for example, the binding portion of paper, is positioned on the paper holder 10. The paper tray section 10 has a through hole 11 in the vertical direction.
is provided. The clincher section 7 is able to move up and down considerably within this through hole ll, so that the distance between the upper end surface of the paper tray section 10 and the guide inclined surfaces 7a and 7b of the clincher section 7 can be adjusted. It has become so. Further, an engaging portion 10a is provided on the lower end surface of the paper tray portion 10. In addition, in the holding member 9, the paper tray is located at the portion l.
A spring guide portion 2 is formed on the lower surface near O. A compression coil spring 13 is interposed between the holding member 9 and the support plate 6 at the circumference of the spring guide portion 12, and the elastic force of the compression coil spring 13 causes the holding member to
The paper holder is biased upward on the unit 10 side. Further, a retaining member 14 is attached to the center of the holding member 9 so as to face downward, and an engaging portion 14a is provided at the tip of the retaining member 14. On the other hand, an opening 6a is provided on the support plate 6 side of the base l, and the engaging portion 9a of the retaining member 14 engages with this opening 6a, thereby preventing the holding member 9 from slipping upward. is prevented.

That is, the holding member 9 is rotatable around the shaft portion 8, and its paper receiving portion 10 is constantly urged to the position shown in FIG. 1 by a compression coil spring 13.
As the handle member 2 is lowered, which will be described later, the compression coil spring 1
The clincher part 7 descends against the urging force of 3.
The paper tray is relatively raised along the through hole 11 to the upper end of the section 10.

Further, a slide member 15 is disposed on the support plate 6 so as to be slidable along the front-rear direction of the support plate 6. A locking portion 15a is provided at the tip of this slide member 15, and this locking portion 15a engages with the engaging portion 10a provided at the lower end of the paper tray section 10 described above. 1st of 9
In the figure, the rotation in the counterclockwise direction, that is, the paper tray is
It is designed to prevent O from falling.

On the lower surface of the slide member 15, guide portions 16.17 are provided at the front end and rear end, respectively, which also serve as a pull-out stopper. A guide hole 18.19 is provided which is slightly longer than the guide portion 16.17. A spring receiver portion 20 is provided at the rear end portion of the slide member 15.

Opposing the spring receiver part 20, a spring receiver part 21 is provided at the rear of the support plate 6 by cutting and raising the support plate 6. These spring retainers are part 20.21
A compression coil spring 22 for returning the slider member is interposed between them. That is, when the locking portion 15a of the slide member 15Li normally comes into contact with the side surface of the clincher portion 7 by the compression coil spring 22 and is biased to engage with the engaging portion 10a, as the handle member 2 is lowered. As a result, the locking portion 15a and the paper tray are disengaged from the engaging portion 10a of the portion 10. It looks like this. The timing at which the slide member 15 starts to retreat is after the legs of the staples 29 pass through the paper as the handle member 2 descends, and immediately before the paper begins to be folded along the bottom surface.

That is, the holding member 9 has its engaging portion 10a working together with the locking portion 15a of the slide member 15, so that the paper tray is
The upper end surface of O and the guide inclined surfaces 7a and 7b of the clincher part 7
By maintaining a predetermined space between the legs of the staple 29, the legs of the staple 29 are not bent until they completely penetrate the paper. Further, when the leg portions of the staples 29 penetrate the paper and enter the folding start state, the slide member 15 retreats and the engagement state between the locking portion 15a and the engaging portion 10a is released, and the holding member 9 rotates in the counterclockwise direction in FIG. This is the result.

The rear portion of the spring receiver portion 21 formed on the support plate 6 is formed to protrude, thereby forming a spring holding portion 23. At the periphery of this spring holding portion 23, a compression coil spring 2 is placed between the support plate 6 and the rear end of the bottom surface of the magazine unit 3.
4 is interposed, and the elastic force of this compression coil spring 24 urges the magazine unit 3 upward.

The magazine unit 3 is composed of a magazine body 25 having a U-shaped cross section, and this magazine body 25 has a shaft portion 2 at its base end.
It is rotatably supported via 7.

The magazine main body 25 is provided with a staple ejection opening 28 for ejecting staples at its tip, and also includes a staple pressing member that presses the loaded staples 29 toward the staple ejection opening 28 by the elastic force of a compression spring 30a. 30 is installed. A stapler presser 26 is disposed above the magazine body 25 and is rotatably supported by a shaft portion 27 at its base end, thereby preventing the staples 29 loaded into the magazine body 25 from escaping upward. It is prevented.

A driver 31 for bending staples is provided at the tip of the handle member 2 in correspondence with the staple punches 028 provided on the clincher portion 7 and the magazine body 25.

Further, the rear end portion of the handle member 2 and the magazine unit 3 are fixed to the rear end portion of the base 1 via a shaft portion 27 . Furthermore, one end portion of a dogleg-shaped link member 32 is fixed to a shaft portion 33 of the handle member 2 . Further, the other end of the link member 32 is engaged with the rear end of the slide member 15 described above. That is, the handle member 2 is rotated around the shaft portion 27 in the counterclockwise direction in FIG. 2, the other end of the link member 15 moves, and the slide member 15 retreats accordingly. Thereby, the engagement state between the locking portion 15a provided at the tip of the slide member 15 and the engagement portion 10a provided at the tip of the holding member 9 is released.

Although not shown in the drawings, the lever member 4 has a structure in which its rear end is pivoted further forward than the pivot positions of the magazine unit 3 and the handle member 2, that is, it constitutes a boosting mechanism, thereby reducing the gripping load. It has been reduced.

Further toward the tip of the lever member 4 from the shaft fixing position,
As shown in an enlarged view in FIG. 2, both side walls have cutout recesses 34a facing each other.

34b is formed. In addition, through holes 35a and 35b are formed in both side walls of the handle member 2 so as to face these notched recesses 34a and 34b, and these through holes 35a and 35b are used as first pressing force applying portions. A pressing force applying bottle 36 passes through the opening, and both ends of the pressing force applying pin 36 are held in cutout recesses 34a and 34b, respectively.

That is, this pressing force applying bottle 36 comes into contact with the bottom surface of the through holes 35a and 35b as the lever member 4 is gripped,
As a result, the handle member 2 is pushed down in the direction of the base 1, and the driver 31 drives the most advanced staple 2.
9 in the direction of the clincher portion 7.

A gap 37 is provided between the upper end of the pressing force applying bottle 36 and the upper surface of the handle member 2.

One end of a leaf spring 38 is interposed in this gap 37, and the elastic force of the leaf spring 38 always urges the pressing force applying bottle 36 to contact the bottoms of the through holes 35a, 35b. There is C. The other end of the leaf spring 38 is attached to the handle member 2
is fixed to the rear end of the

A pressing force applying member 40 as a second pressing force applying unit is attached to the lever member 4 so as to face the abutting portion 39 provided on the upper surface of the tip portion of the handle member 2.

In this pressing force applying member 40, the lever member 4 rotates during clinching and presses the handle member 2 via the pressing force applying bottle 36, whereby the driver 31 pushes out the staple 29, and the leg of this staple 29 The handle member 2 is provided at a position corresponding to the position where the handle member 2 contacts the contact portion 39 of the handle member 2 immediately after the handle member 2 contacts the clincher portion 7 and starts bending. That is, the handle member 2 by the lever member 4
Immediately after the leg portions of the staple 29 start bending, the pressing force applied to the staple 29 is switched from the pressing force applying bottle 36 to the pressing force applying member 40 side.

Next, the operation of the stapler having the above configuration will be explained.

First, before the start of the spelling operation, when the lever member 4 is not pressed down, the magazine unit 3 is biased upward by the compression coil spring 24 and is in a lifted state, as shown in FIG. . Further, the handle member 2 is also lifted upward together with the magazine unit 3. Further, the slide member 15 moves forward due to the biasing force of the compression coil spring 22, and the locking portion 15a thereof contacts the side wall surface of the clincher portion 7, and the locking portion 15a engages with the engaging portion 10a of the holding member 9. The paper receiver prevents the unit 10 from lowering, that is, the holding member 9 from rotating. As a result, the paper receiver maintains a certain space between the upper end surface of the portion 10 and the clincher portion 7, that is, a space sufficient to prevent the legs of the staples 29 passing through the paper from being bent.

In such a state, after placing the paper as a member to be bound on the paper receiver section 1O, the lever member 4 is pressed by gripping the paper receiver.
When pressed down, the handle member 2 is pushed down via the pressing force application bottle 36, and the staple ejection opening 28 is thereby pushed down.
The magazine unit 3 rotates counterclockwise in FIG. 1 about the shaft portion 27 together with the handle member 2 until it comes into contact with the paper.

After the staple ejection port 28 contacts the paper, when the lever member 4 is further lowered, the staples 29 loaded in the magazine unit 3 are ejected from the staple ejection port 28 by the driver 31, as shown in FIG. As a result, the legs of the staple 29 penetrate the paper and further protrude into the through hole 11, and the clincher portion 7
is brought into contact with.

At the same time, as the handle member 2 descends, the link member 32 rotates counterclockwise in FIG.
The slide member 15 is moved backward against the urging force of. As a result, the paper receiver disengages the engaging portion 10a of the section 10 and the locking portion 15a of the slide member j5, and as a result, the holding member 9 becomes rotatable in the counterclockwise direction.

When the lever member 4 is further pushed down from this state, the handle member 2 is lowered by the pressing force imparting bottle 36, and as a result, the driver 31 pushes out the staple 29 from the staple ejection opening 28, and at the same time, the holding member 9 As the sheet tray rotates, the portion 10 of the sheet tray is lowered. As a result, as shown in FIGS. 4 and 5, the legs of the staple 29 are oriented in opposite bending directions on the guide slopes 7a and 7b provided on the clincher portion 7, and the bending starts.

Immediately after this, the pressing force applying member 40 provided on the lever member 4
comes into contact with the contact portion 39 of the handle member 2, thereby switching the pressing force applied from the lever member 4 to the handle member 2 from the pressing force applying bottle 36 to the pressing force applying member 40. The pressing force applied through the paper causes the staple 29 to be folded flat along the bottom surface of the paper. 6(a) to 6(c) show the process of bending the staple 29, and FIG. 6(a) is similar to FIG. 3 and FIG. 6(b).
corresponds to the state shown in FIG. 4, and FIG. 5(c) corresponds to the state shown in FIG.

Next, after releasing the lever member 4 to return to the state shown in FIG. 1, the paper receiver takes out the paper from the section 10, thereby completing the -th spelling operation.

As is clear from the above operation, in the stapler of this embodiment, when the driver 3I is moved as the lever member 4 is rotated toward the base l side, the pressing force applied to the handle member 2 is applied to the leg of the staple 29. Immediately after the clincher part penetrates the paper and comes into contact with the clincher part 7 to start folding, the pressing force applying member 36 is switched to the pressing force applying member 40 provided at the tip of the lever member 4. Compared to staplers of conventional structure, the gripping stroke is reduced and sufficient impact force necessary for flat clinching can be obtained, so flat clinching can be performed reliably.

That is, in the flat type clinch, after the legs of the staple 29 begin to bend once after penetrating the paper as described above, clinching can be performed with extremely light force.

Therefore, at this time, by switching the application of pressing force to the driver 31, that is, the handle member 2, from the pressing force applying bottle 36 constituting the boosting mechanism to the pressing force applying member 40, the gripping stroke can be shortened. The impact force necessary for clinching can be obtained, and the clinching movement can be performed reliably.

[Effects of the Invention] As described above, according to the stapler according to the present invention, when the driver is lowered through the handle member by gripping the lever member, the legs of the stapler apply pressure to the handle member. Immediately after penetrating the member to be wrapped and abutting against the clincher portion to start bending, the first pressing force applying portion is switched to the second pressing force applying portion provided at the tip of the lever member. As a result, the gripping stroke is smaller than that of a stapler with a conventional structure (and the impact force required for flat type clinching can be obtained sufficiently).
Therefore, a flat clinch can be performed reliably.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a stapler according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-n in FIG. 1, and FIGS. 3 to 5 explain the operation of the stapler. FIG. 6 is a front view showing the bending process of the stapler as the stapler operates.

Claims (1)

[Claims] At the rear end of the base, which has a clincher part for bending the legs of staples at its tip, a handle member having a driver for bending staples at its tip, and the rear ends of the magazine unit for loading staples are attached to the rear end of the base. At the same time, the rear end of the lever member is pivoted on the tip side of the shaft fixing position of the base, and a pressing force is applied to the handle member further on the distal side from the shaft fixing position of the lever member. A first pressing force applying part is provided for rotating the handle member toward the base, and the driver is lowered together with the handle member by rotating the lever member about the shaft fastening part. After passing the leg portion of the staple through the member to be bound, the lever member is further rotated to bend the leg portion of the staple along the back side of the member to be bound at the clincher portion. In the stapler that performs a binding operation, a second pressing force applying portion is provided at a position opposite to the handle member at the distal end of the lever member, and the leg portion of the staple penetrates the member to be stapled and comes into contact with the clincher portion. Immediately after the handle member contacts and starts bending, the pressing force applied to the handle member is switched from the first pressing force applying part to the second pressing force applying part.