JPH0650145Y2 - Stapler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a so-called flat clinch type stapler capable of bending leg portions of staples flat along the back surface of a member to be stapled.

[Prior Art] This type of stapler is devised so that the folded portions of the leg portions of the staple are not bulky when the stapled members that are stapled are piled up in multiple layers. . 2. Description of the Related Art Conventionally, there is known a structure in which a leg portion of a staple is substantially pierced by a stapled member and then the leg portion is bent flat by a clinching operation as shown below.

That is, a clincher guide is provided rotatably with respect to a base with the clincher fixed in a protruding state, and a rear portion of the guide is rotatably supported by the base and a front portion of the clincher guide inserts the fixed clincher. A guide hole forming a part is formed, and the front part of the clincher guide is constantly urged upward by a compression coil spring which is an elastic urging means, and the clincher guide is normally moved upward by a slide member engaged with the clincher guide. In the stapling operation in which the staples in the staple magazine are held by the driver toward the to-be-stitched member placed on the clincher guide, the slide member is engaged with the clincher guide at an appropriate timing. The guide is allowed to descend when it is released, which causes the staple clinch movement. And it has a configuration that is made.

According to the above configuration, the slide member is disengaged from the engagement with the clincher guide at the timing when the leg portion of the staple is substantially pierced with respect to the stapled member, whereby the front portion of the clincher guide is allowed to descend. Since the leg portion of the staple is sharply bent by the clincher, the leg portion does not have a spectacle-like curved shape on the back surface of the member to be stapled, but is bent flat along the surface.

[Problems to be Solved by the Invention] In the above-mentioned conventional stapler, the vertical movement when the front portion of the clincher guide performs the clinching operation is performed with the rotation axis at the rear portion of the guide as a fulcrum. motion,
That is, since it makes an arc motion, the guide hole for guiding and inserting the clincher that stands upright in a fixed state has a sufficient margin in the front-rear direction to allow the arc motion, and at the same time, the guide itself also moves slightly back and forth. It requires a configuration that can For example, when a fixed rotation support shaft is provided at the rear part of the guide, a shaft hole for receiving this support shaft is formed in a long hole in the base, which allows the guide to move in the front-rear direction and allows the clincher guide The vertical movement of the section is performed smoothly.

However, due to the above-mentioned allowance of the guide hole and the configuration of the long hole, the clincher guide is inevitably moved in the front-rear direction when the clincher guide is moved up and down. By
The timing to release the honorific cormorant between the clincher guide and the slide member becomes uncertain, and it is difficult for the clincher to perform the clinching operation of staples at a constant timing.Therefore, when bending the staple leg, The shape, that is, the flat clinch shape varies, and there is a problem that a uniform and stable clinch operation cannot be performed.

The present invention has been made in view of such problems,
Its purpose is to positively prevent unnecessary play, which is likely to occur when the clincher guide that can move back and forth moves up and down, and keep the timing of disengagement between the clincher guide and the slider member constant at all times. Another object of the present invention is to provide a stapler capable of eliminating clinch-shaped variations and performing a uniform and stable clinch operation.

[Means for Solving the Problems] In order to solve the above conventional problems, the present invention provides:
A base to which a staple leg bending clincher is fixed at a staple bending position, a staple magazine attached to the base so as to be vertically movable, and a handle member having a driver for ejecting the staples in the magazine,
A rear portion is supported by the base so as to be rotatable and movable with respect to the front-rear direction, and an insertion guide portion for allowing the clincher to relatively freely move is inserted in the front portion, and the front portion is located at an upper position when rotating. A clincher guide that can move up and down between a push position and a push position; an elastic urging means that urges the clincher guide toward its upper position; an engagement position that normally supports the clincher guide in the upper position; The clincher guide is slidably arranged on the base between the clincher guide and the non-engaging position that allows the clincher guide to descend from the upper position to the depressed position against the elastic biasing means, and the staple driving operation of the handle member. In response to the slide position, the staple legs are flatly bent along the back surface of the stapled member. Based on the configuration described above, an action of urging the clincher guide toward the rotating shaft rearward so that the insertion guide portion is always in sliding contact with the clincher during vertical movement of the front portion of the clincher guide. The present invention proposes a stapler equipped with the elastic biasing means.

Further, in the above configuration, for example, the elastic biasing means has a compression coil spring, and a first mounting fixed end for fixing one end of the coil spring is provided on the base and the other end of the coil spring is fixed. A configuration in which a second mounting fixed end is provided on the clincher guide, the first mounting fixed end is arranged offset to the rear side of the second mounting fixed end, and the central axis of the coil spring is biased. Are suggested.

[Operation] With the above configuration, in the stapler according to the present invention,
The clincher guide is constantly urged rearward so that the insertion guide portion provided at the front portion of the clincher guide is slidably contacted with the clincher by the elastic urging means for urging the clincher guide toward the upper position. Since the action is provided, the backlash in the front-back direction of the clincher guide is positively prevented without providing a separate biasing means, and the timing of engagement / disengagement of the slide member with respect to the clincher guide is based on the fixed clincher. Since the timing is set accurately and constant, the clincher guide can move up and down at a predetermined timing according to the staple ejection operation, and the clinching operation is uniform and stable with little variation in the flat clinch shape. Can be done.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a base, 2 is a staple magazine, 3 is a handle member, 4 is a clincher guide, 5 is a compression coil spring, and 6 is a slide member.

The base 1 is composed of a support plate 11 forming an upper surface thereof and an exterior cover 12 forming a bottom surface thereof. A clincher 13 is projectingly fixed to the front end portion (the left end portion in FIG. 1) of the support plate 11, and the leg portion of the staple is bent on the upper surface of the clincher 13.

The staple magazine 2 is disposed above the base 1 in the front-rear direction, has a staple ejection port 14 facing the clincher 13 at the front end of the bottom, and staples 15 are arranged inside. These staples 15 are pressed toward the ejection port 14 by a staple pressing member 16 via a compression spring (not numbered).

This magazine 2 is stored in a magazine storage member 17 so that it can be pulled out forward. The rear end of the member 17 is rotatably supported by the base 1 via a shaft portion 18, and the magazine 2 moves the staple ejection port 14 toward and away from the clincher 13 according to the rotation of the member 17. It can be moved up and down. The storage member 17 is always held together with the magazine 2 in the raised position shown in FIG. 1 by the return coil spring 19.

The handle member 3 is disposed above the magazine accommodating member 17 and its front end portion has the staple ejection port 14
A driver 20 for ejecting the staples 15 is provided, and the rear end portion is rotatably engaged with the shaft portion 18.

An end portion of an L-shaped link member 21 is pivotally supported on the handle member 3 via a shaft portion 22. This link member 21
The central bent portion 21a extends rearward from the one end portion, the central bent portion 21a is slidably engaged with the upper surface 17a of the magazine storing member 17, and the engaging portion 21b formed at the other end portion. Corresponds to a corresponding engaging portion 39 of the slide member 16 described later so as to be engageable. The link member 21 responds to the driving operation of the staple 15 in the magazine 2 by the driver 20, and rotates about the shaft portion 22 counterclockwise in FIG. 1 with the central bent portion 21a as a fulcrum. It has become. Further, a leaf spring 24 formed by extending the driver 20 is interposed between the handle member 3 and the magazine accommodating member 17, so that the driver 20 does not always eject the staple 15 as shown in FIG. It is biased towards the inoperative position.

A lever member 23 is arranged above the handle member 3 along the longitudinal direction thereof. The rear end of the lever member 23 is rotatably attached to the rear end of the base 1 via a shaft (not shown) located in front of the shaft 18. lever
When the front end of 23 is pushed down, the pushing force is
It is adapted to be attached to the handle member 3 via a pin 25 located further forward than the shaft portion. With this configuration, when the handle member 3 is rotated counterclockwise in FIG. 1 in accordance with the gripping operation of the lever member 23, the pressing force of the lever member 23 is reduced by the action of the lever. As described above, when the lever member 23 is pushed down, the pushing force is transmitted to the driver 20 through the handle member 3 to lower the magazine 2 and move the staples 15 in the magazine 2 below the ejection port 14. It is configured to launch.

The clincher guide 4 extends over substantially the front half area of the support plate 11,
It is arranged between the magazine 2 and the support plate 11. A guide hole 29 is provided in the front portion of the clincher guide 4 so as to form an insertion guide portion through which the clincher 13 is vertically movable. The rear portion of the clincher guide 4 is rotatably supported by the base 1 via a rotation shaft 30, and the rotation shaft 30 is formed in a long hole 31 formed in the base 1 in the front-rear direction in the front-rear direction ( The guide hole is engaged so that it can move with play in the left-right direction in FIG.
When the front part of the clincher guide 4 including 29 moves up and down, the clincher guide 4 is allowed to move in the front-rear direction.

The compression coil spring 5 forms an elastic biasing means and is interposed between the clincher guide 4 and the support plate 11. The compression coil spring 5 is a generally available spring member in which the axis of the winding is straight before attachment, and the lower end of the compression coil spring 5 has a support plate.
It is fixed to a first mounting fixed end 33 provided on the upper surface of 11, and its upper end is fixed to a second mounting fixed end 34 provided on the lower surface of the clincher guide 4. The second mounting and fixing end 34 is located on the lower surface of the guide 4 in the vicinity of the guide hole 29, and is integrally formed in a boss shape. As shown in the figure, the first mounting fixed end is displaced rearward from the second mounting fixed end 34 toward the rotary shaft 30 of the clincher guide 4, that is, arranged so as to be offset, and protrudes integrally with the support plate 11. Has been formed. Due to such an offset configuration of the upper and lower mounting and fixing ends, the coil spring 5 is mounted with its center axis line XX deviated as shown by the alternate long and short dash line in the figure.
As a result, in addition to the action of the coil spring 5 urging the guide 4 upward with respect to the clincher guide 4, at the same time, it has the action of constantly urging the guide 4 rearward (to the right in the drawing). . Guide 4 with this coil spring 5
The clincher guide 4 is vertically moved in a state where the front inner wall 29a of the guide hole 29 of the guide 4 is always in sliding contact with the clincher 13 by the backward biasing action of the clincher guide 4. As a result, play in the front-rear direction is positively eliminated when the guide 4 moves up and down.

It is also possible to reverse the offset direction of the above-mentioned coil spring 5 to urge the clincher guide 4 forward, contrary to the above case, to eliminate the play of the guide 4. However, if the structure is such that the coil is biased rearward as in this embodiment, the biasing direction of the coil spring 5 is
Since the engaging portion 35 of the slide member 6 slides rearward from the engaging portion 32 and is in the same direction as the acting direction of the frictional force when engaging and disengaging, the engaging portion 32 and the engaging portion 35 The effect is that there is no deviation in the timing of non-engagement. Therefore, the timing of non-engagement can always be obtained stably, and a good clinch operation can be maintained. Further, unlike the present embodiment, it is possible to prevent backlash by sliding the clincher guide 4 on the other portion of the base 1, for example, but when assembling the respective components of the stapler of the present embodiment, As described above, the configuration in which the clincher 13 is used as the reference position for design is excellent in obtaining stable and highly accurate operation.

The slide member 6 is slidably arranged along the upper surface of the support plate 11, and a spring receiving portion 36 is provided at the center thereof. The support plate 11 faces the spring receiving portion 36.
And an opposing spring receiving portion 37 is provided by cutting and raising the compression coil spring 3 for returning the slide member between the spring receiving portions 36 and 37.
8 is interposed. The spring 38 urges the slide member 6 to the engagement position in which the locking portion 35 of the slide member 6 is in contact with the rear side surface of the clincher 13 at all times, that is, when the driver 20 is not operated, and the clincher guide 4 is urged. Engagement with the engaging portion 32 is maintained, which prevents the clincher guide 4 from descending. On the other hand, when the link member 21 rotates as shown in FIG. 2, the engaging portion 21b pushes the corresponding engaging portion 39 of the slide member 6 rearward, whereby the slide member 6 resists the spring 38 and moves rearward. The engagement between the locking portion 35 and the engaging portion 32 is released by sliding on. The timing for releasing the engagement is set after the leg portion 15a of the staple 15 substantially penetrates the stapled member 40 downward. Then, as shown in FIG. 3, the clincher guide 4 descends at the above timing, and the leg portions 15a (shown in FIG. 2) of the staple 15 protruding downward are moved by the cam action of the upper surface of the clincher 13 to move the stapled member 4 of the stapled member 4. A flat clinch is made by bending it flat along the back surface.

The timing at which the clincher guide 4 is released from the slide member 6 when the clinching operation is performed in this manner is
As described above, since the clincher guide 4 is always held constant by the action of urging the clincher guide 4 backward by the coil spring 5, even if the clincher guide 4 itself is movable forward and backward in front of the rotation shaft 30, A stable and reliable clinch operation without play can be performed, and a sufficient flat clinch effect can be exhibited.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above-mentioned embodiments and can be modified within the scope of the invention. For example, in the embodiment, the elastic urging means is composed of the compression coil spring arranged with the central axis deviated, but it may be composed of a leaf spring or a tension coil spring instead.

[Effects of the Invention] As described above, according to the stapler of the present invention,
For the elastic biasing means involved in the vertical movement of the clincher guide,
A function of urging the clincher guide to the rear is provided, whereby the insertion guide part of the clincher guide is slidably contacted with the clincher to positively prevent the backlash of the clincher guide in the forward direction, and the sliding member does not contact the clincher guide. Since the engagement timing is kept constant and accurate, the clincher moves up and down at a predetermined timing according to the staple ejection operation, and it is possible to always perform a uniform and stable flat clinching operation without variation. ,
Moreover, various effects such as a simple structure and low cost can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a stapler according to an embodiment of the present invention, and FIGS. 2 and 3 are vertical cross-sectional views showing the operation of the stapler. 1 ... Base, 2 ... Staple magazine 3 ... Handle member, 4 ... Clincher guide 5 ... Compression coil spring, 6 ... Sliding member 13 ... Clincher 15 ... Staple, 20 ... Driver 29 ... Guide hole 29a ... Front inner wall of guide hole 30 ... Drive shaft 33 ... First mounting fixed end 34 ... Second mounting fixed end

Claims (2)

[Scope of utility model registration request] 1. A handle member having a base to which a clincher for bending staple legs is fixed at a staple bending position, a staple magazine attached to the base so as to be movable up and down, and a driver for ejecting staples in the magazine. A rear portion is supported by the base so as to be rotatable and movable with respect to the front-rear direction, and an insertion guide portion for allowing the clincher to be relatively movable is inserted in the front portion. A clincher guide that can move up and down between an upper position and a depressed position, an elastic urging means that urges the clincher guide toward its upper position, and an engagement position that normally supports the clincher guide in the upper position. And a non-engagement position that allows the clincher guide to move downward from the upper position to the pressed position against the elastic biasing means. And a slidable member slidably disposed on the base and slidably moved from the engagement position to the non-engagement position in response to the stapling-out operation of the handle member. In a case where the clincher guide is bent flat along the back surface, the clincher guide is rearwardly directed toward the rotating shaft so that the insertion guide portion always slides on the clincher during vertical movement of the front portion of the clincher guide. A stapler, characterized in that the elastic biasing means is provided with an action of biasing against. 2. The elastic biasing means has a compression coil spring, and a first mounting fixed end for fixing one end of the coil spring is provided on the base and a second mounting for fixing the other end of the coil spring. 2. The clincher guide is provided with a fixed end, the first attachment fixed end is arranged to be offset rearward of the second attachment fixed end, and the central axis of the coil spring is biased. Stapler.