JPH0118297Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a staple folding device for a stapler that folds the legs of the staples passed through the binding paper flatly along the bottom surface of the binding paper. be.

(Prior art) Conventional staplers of this type, in which the legs of the staples passed through the binding paper are folded horizontally along the bottom surface of the binding paper, have a large number of parts and are difficult to configure. The device is large-scale and cannot be applied to small-sized hand staplers.

In view of the above-mentioned circumstances, the present invention has a simple structure that allows the legs of the staple that penetrates the binding paper to be reliably bent flat along the bottom surface of the binding paper, and is applicable to small hand staplers. As a staple bending device in a stapler, Jitsuganaki
No. 60-125727 and Utility Application No. 60-125728 were developed.

By the way, these staple folding devices are
The front end of a slider that has a passive cam on the side prevents the lowering of a paper mounting table having an opening for inserting staples, and a screwdriver attached to the handle is used to insert the staple leg into the binding paper placed on the paper mounting table. After penetrating the staple, the slider is moved backward via a passive cam using an actuator formed on the handle to release the prevention of the paper table from descending, and the staple is released by pressing down the handle and using the clincher member. Since the legs are bent flat from the penetration base along the bottom surface of the binding paper,
The timing to release the lowering prevention of the paper loading table, that is, the timing to bend the staple legs, is determined by the relative position of the handle side (actuator) and the base side (passive cam), and the penetration state of the staple legs. is always constant regardless of Therefore, if you adjust this timing for thick binding paper with a large number of sheets, when binding thin binding paper with a small number of sheets, the leg of the staple will be adjusted before the leg of the staple finishes penetrating the bound paper. When the folding is done, the staples may be left floating, or the staples may be easily folded into a pair of glasses.On the other hand, if the above timing is adjusted to a thin binding paper with a small number of sheets, the number of sheets may be large. When binding thick bound paper, the rotation of the handle (actuator) is restricted by the thickness of the paper, and the operating cam cannot engage the passive cam, making it impossible to bend the legs of the staple.

(Problems to be Solved by the Invention) The present invention was made to solve the above-mentioned difficulties.Regardless of the number of sheets of binding paper, the leg of the staple is always attached to the bottom surface of the binding paper in the same state. The object of the present invention is to provide a staple folding device for a stapler that can be folded flatly.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a handle equipped with a screwdriver and a rear end of a magazine unit pivoted on the rear end of the base, and the front end In the stapler equipped with a clincher member in the section, a paper mounting table having an opening for inserting staples is disposed at the front end of the base so as to be movable up and down, and a paper mounting table is provided at the front end of the base. A slider that prevents the slider from descending is arranged so as to be movable back and forth, and a passive cam is attached to the top surface of the slider, so that when the handle and the magazine unit approach each other during paper binding, the rear end moves the slider backward via the passive cam. An actuating member for releasing the prevention of the downward movement of the paper loading table is pivoted to either the handle or the magazine unit, and the actuating member releases the prevention of the downward movement of the paper loading table immediately before the driver finishes pushing out the staples. It is characterized by the following.

(Function) Since the present invention is configured as described above,
When the handle is not pressed down, the magazine unit and handle are lifted, the paper table is raised and prevented from lowering by the slider, and the actuator is separated from the passive cam. Therefore, when the binding paper is placed on the paper table and the handle is pushed down, the staple ejection opening formed in the magazine unit comes into contact with the binding paper, and the actuator faces the passive cam provided on the slider, and the staple is pushed further. By performing the lowering operation, the staple is pushed out by the driver, and the staple is penetrated through the binding paper. In the process of pushing out the staple, the actuating member rotates, and the rear end gradually approaches the passive cam, and the staple is pushed out. Immediately before the extrusion of the sheet is completed, the actuating member causes the slider to retreat via the passive cam to release the prevention of the paper table from descending. Next, in the process of lowering the magazine unit handle and the paper table together, the legs of the staples are bent flat by the clincher member along the lower surface of the bound paper.

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

In the figure, 10 is a base made of synthetic resin,
The base 10 is made up of a bottom plate 11, a front plate 12, and left and right side plates 13, 13' each having a rising portion at the rear, and a magazine (to be described later) is located at the rear end of the rising portion of each side plate 13, 13'. Unit 20 and handle 3
A shaft attachment portion 14 for pivotally attaching a clincher member 50, which will be described later, is installed on the inner surface of each side plate 13, 13' near the front end. There are projecting ridges 16 and 16' for guiding the paper mounting table 60 that guide the paper mounting table 60 up and down, and a slider 70 (described later) is provided in the middle of the bottom plate 11.
A slot 17 for guiding the slider is provided to guide the screw 71 for attaching the passive cam, and a leaf spring 18 for returning the magazine unit and a curved leaf spring 19 for returning the slider are attached to the rear end of the bottom plate 11. can be,
The magazine unit return leaf spring 18 has an escape hole 1 to avoid the slider return curved leaf spring 19.
8' (see Figure 3) is formed.

Reference numeral 20 denotes a magazine unit, and the magazine unit 20 includes a magazine main body 21 that is large enough to fit into the base 10 and has a cross-sectional shape, and a magazine cover that is large enough to fit into the magazine main body 21 and has a cross-sectional shape. 22, the magazine cover 22 is provided with a protrusion 25 at the front end of its top plate to be inserted into a window hole 41 of a driver 40 (to be described later), and descending portions 27, 27 at the rear ends of the left and right side plates. ′
(See Fig. 11), and a shaft attachment part 26 for pivotally mounting an operating member 90, which will be described later, is installed in the middle, and a needle pusher 23 and a needle pusher spring 24 are provided in the magazine body 21. , and the upper edges of the left and right side plates have recesses 28 and 2 into which the shaft 26 is fitted.
8' (see FIG. 12) is formed. and,
The rear end portions of the magazine body 21 and the magazine cover 22 are connected to the base 1 as shown in FIGS. 1 to 3.
The magazine unit is pivoted by a pivot shaft 14 installed at the center of the magazine 1, and is biased upward by the magazine unit return leaf spring 18.

Reference numeral 30 denotes a handle, and the handle 30 has a cross-sectional shape whose width is larger than the width of the base 10, and its rear end is pivoted to the outside of the base 10 as shown in FIGS. 1 to 3. It is mounted on a shaft 14.

Reference numeral 40 denotes a driver, which is attached to the lower surface of the top plate of the handle 30, and is formed by bending the tip of a leaf spring 42 whose width is smaller than the width of the magazine body 21 into a downward shape. The projecting piece 25 of the magazine cover 22
A window hole 41 is formed through which it is inserted. The rear end of the leaf spring 42 is connected to a central elastic piece 43 as shown in FIG.
The central bullet piece 43 presses the magazine cover 22, and the side bullet pieces 44, 44' press an operating member 90, which will be described later. There is.

Reference numeral 50 denotes a clincher member, and as shown in FIGS. 4 and 7, the clincher member 50 has a flat recess 51 with a depth corresponding to the thickness of the leg of the staple on the upper surface of the plate-shaped clincher member main body. Guide inclined surfaces 52, 52' for orienting the legs of the staples passing through the bound sheets in opposite bending directions on both sides of the sheet.
and locking claws 53, which engage with the locking H-shaped protrusions 15, 15' of the base 10, are formed at the lower part of both sides.
53', and a spring swing window 54 is formed in the center between the front and rear surfaces to allow deformation of a leaf spring 61 for returning the paper table, which will be described later. The clincher member 50 is attached to the base 10.
The locking pawl 53,
At 53', the horizontal protrusions constituting the locking H-shaped protrusions 15, 15' are elastically deformed to be removably fixed to the base 10.

Reference numeral 60 denotes a paper mounting table, and the height, width in the left-right direction, and length in the front-back direction are equal to the depth at the front end of the base 10 and the distance between the left and right side plates 13, 13', respectively. and a locking portion 72 at the front end of a slider 70, which will be described later, is formed by cutting out the rectangular parallelepiped paper mounting table main body across the rear surface and the lower surface, which is equal to the distance between the front plate 12 and the paper mounting table guide protrusion 16. An engagement stepped portion 62 is formed, and guide grooves 63, 63' are provided on the left and right side surfaces to engage with the locking H-shaped protrusions 15, 15' of the base 10. A staple insertion opening 64 that fits into the clincher member 50 is provided at the center of the lower surface, and the guide grooves 63, 63' and the staple insertion opening 6 are provided.
Relief grooves 65, 65' are provided at the lower edge of the partition wall formed between the clincher member 50 to avoid the locking claws 53, 53' of the clincher member 50 (see FIGS. 4 to 6);
The clincher member 50 extends between the front and rear surfaces.
A spring insertion hole 66 communicating with the spring movement window hole 54 is provided. As shown in FIGS. 1, 2, and 4, the paper mounting table 60 includes the base 10 and a clincher member 50 fixed to the base 10.
a clincher member 50 which is fitted in such a manner that it can be raised and lowered, and which communicates with the spring insertion hole 66 of the paper mounting table 60;
The spring swing window hole 54 and the leaf spring 6 for returning the paper loading table.
The front end of the leaf spring 61 for returning the paper table is inserted through the leaf spring 61, and the rear end of the leaf spring 61 is inserted into a slider 70, which will be described later.
It is attached to.

70 is a slider, and the slider 70 has a width in the left and right direction equal to the left and right side plates 13 of the base 10,
A locking portion 72 that engages with the lower surface of the engagement step portion 62 of the paper mounting table 60 is formed at the front end of the plate-shaped slider main body that is approximately equal to the spacing between the two. The leaf spring 6 for returning the paper table between
The left and right side plates 13, 13' of the base 10 are interposed with a gap 73 for allowing the vertical movement of the base 10.
A flat plate part 74 is formed close to the upper edge of the front end of the plate, a passive cam mounting hole 75 is formed near the rear end, and a push screw 76 for fine adjustment of the passive cam is provided at the rear end. The flat plate part 74
The leaf spring 61 for returning the paper mounting table along the lower surface of
The rear end of the slider 70 is inserted into the slider 70. The slider 70 is slidably mounted on the bottom plate 11 of the base 10, and is inserted into the passive cam mounting hole 75 of the slider 70 through the slider guide slot 17 formed in the bottom plate 11 of the base 10. A passive cam 80, which will be described later, is attached to the upper surface near the rear end of the slider 70 with a passive cam attachment screw 71 inserted therethrough, and the slider 70 is urged in the forward direction by the slider return curved leaf spring 19. ing. As shown in FIG. 1, when the paper placing table 60 is raised by the paper placing table returning leaf spring 61 and the slider 70 is moved forward by the slider returning curved leaf spring 19, the slider 70 is engaged. The stop portion 72 engages with the engagement step portion 62 of the paper mounting table 60 to prevent the paper mounting table 60 from descending. In addition, the clincher member 5
The distance to the concave portion 51 of No. 0 is such that the tip of the leg of the staple that has passed through the minimum number of bound sheets to be placed on the top surface of the paper placement table 60 reaches the concave portion 51; The dimension of the ascending and descending stroke is the same as the dimension of the thickness of the tip portion of the slider 70 having the locking portion 72.

Reference numeral 80 denotes a passive cam, and the passive cam 80 has a plate-like passive cam body whose width is the same as the width of the slider 70, and a cam surface 81 formed of an arcuate surface with a radius to be described later at the front end thereof. It is. As shown in FIGS. 1 and 2, the passive cam 80 is placed on the slider 70, and its rear end is connected to the push screw 70.
The slider 7
It is attached so that it can be finely adjusted to 0. The cam surface 81 of the passive cam 80 is centered on the axis of the shaft 14 mounted on the base 10 when the slider 70 moves forward and prevents the paper table 60 from descending (see FIG. 1). It is formed of an arcuate surface having a radius greater than the center-to-center distance between the pivot shaft 14 and the pivot shaft 26 installed on the magazine cover 22.

Reference numeral 90 denotes an actuating member, and the actuating member 90 has a top plate 91 and a side plate 92 whose width is large enough to fit between the side plates 13, 13' of the base 10 and the side plates of the magazine body 21. , 92', the rear end of the top plate 91 of the actuating member main body is bent in an upward direction, and a leaf spring 42 is attached to the rear end of the top plate 91 of the handle 30. escape groove 93 to avoid the central bullet fragment 43 of
Further, shaft mounting holes 94, 94' are provided near the rear ends of both side plates 92, 92' to be pivotally mounted to the shaft mounting shafts 26 installed on both side plates of the magazine cover 22. Actuators 95, 95' are formed to hang down from the lower edges of both side plates 92, 92' in the vicinity of 94, 94'. As shown in FIGS. 1 to 3, the actuating member 90 is arranged so as to straddle the magazine unit 20 with actuators 95 and 95', and is attached to the magazine cover 22 with shaft mounting holes 94 and 94'. The leaf spring 42 is pivoted to the installed shaft 26, and the upper surface of the rear end is pressed by the elastic pieces 44 and 44' on both sides of the leaf spring 42 attached to the lower surface of the top plate of the handle 30, and the front end of the leaf spring 42 is pressed against the plate spring 42. The spring 42 is brought into contact with a portion of the driver 40, and the pivot shaft 26 is biased by the leaf spring 42 so that the magazine body 2
The actuating member 9 is pressed against the upper edge of both side plates of
0 rotates around the pivot shaft 14 together with the magazine unit 20 when the handle 30 is pushed down, and further, the rear end of the actuating member 90 is rotated just before the driver 40 finishes pushing out the staples out of the magazine body 21. The actuators 95 and 95' of the section rotate around the pivot shaft 26 to rotate the cam surface 8 of the passive cam 80.
1 and causes the passive cam 80 to retreat.

Note that instead of installing the shaft 26 between both side plates of the magazine cover 22, the shaft 26 is installed between the magazine body 2
A mounting shaft may be provided on the outer surface of both side plates of 1. Furthermore, the clincher member and paper mounting table in the present invention can be modified in various ways, for example,
Similar effects can be obtained by applying the operating member and passive cam of the present invention to the clincher member and paper mounting table in No. 125727 and Utility Model Application No. 60-125728.

Since the embodiment of the present invention is configured as described above, when the handle 30 is not pressed down, the first
As shown in the figure, the magazine unit 20 and the handle 30 are urged upward and lifted by the magazine unit return leaf spring 18, and the paper loading table 60 is lifted by the paper loading table return leaf spring 61. The slider 70 is urged forward and moved forward by the curved leaf spring 19 for returning the slider, and the locking portion 72 of the slider 70 engages with the paper mounting table 60. It engages with the lower surface of the stepped portion 62, and the paper table 60 is prevented from descending, and the rear end of the operating member 90 is pressed downward by the leaf spring 42 attached to the lower surface of the top plate of the handle 30. , actuators 95 and 95' are positioned in front of the virtual extension surface of the arcuate cam surface 81 of the passive cam 80. Therefore, when the binding paper is placed on the paper table and the handle 30 is pushed down, the actuating member 90, together with the magazine unit 20 and the handle 30, is rotated as shown in FIG. After the staple extrusion port 29 comes into contact with the binding paper, the staple (not shown) in the magazine body 21 is pushed out by the driver 40, and the leg of the staple penetrates the binding paper. In the process of being projected into the staple insertion opening 64 of the paper mounting table 60, the front end of the actuating member 90 is pushed down by the top plate of the handle 30 via the leaf spring 42, and the actuating member 90 is pushed down by the top plate of the handle 30. The actuators 95, 9 are rotated counterclockwise around the actuators 95, 9.
The lower end of 5' enters in front of the cam surface 81 of the passive cam 80, and just before the staple extrusion is completed,
That is, the lower end surface of the driver 40 is the needle ejection opening 2.
9, the cam surface 81 of the passive cam 80 is pressed rearward, and is moved backward against the passive cam 80, the slider 70, and the slider return curved leaf spring 19, and the engagement step of the paper table 60 is pushed back. Part 62
The slider 70 is disengaged from the locking portion 72, and the prevention of the downward movement of the paper mounting table 60 is released.
The magazine unit 20, handle 30, and paper mounting table 60 are lowered together until the paper mounting table 60 reaches the bottom plate 11 of the base 10. In the process of lowering the paper table as described above, the legs of the staple are pushed into the recess 51 while being oriented in opposing bending directions by the guide inclined surfaces 52 and 52' of the clincher member 50, and It is folded flat along the underside of the paper. Next, after releasing the handle 30 to return the stapler to the state shown in FIG. 1, the binding sheets on the paper table 60 are taken out, and one binding operation is completed. The timing at which the actuating member 90 causes the passive cam 80 to retreat can be finely adjusted by the passive cam fine adjustment push screw 76.

In addition, in the above-mentioned embodiment, the slider 7
An operating member 90 for retracting the 0 is rotatably attached to the magazine unit 20 by a pivot shaft 26, but instead of this structure, as shown in FIG. 192, 192'
Pivot mounting holes 194, 194' are provided near the front end of the
As shown in FIG. 14, the front end of the actuating member 190 is formed by extending side plates 192, 192' to the rear of the top plate 191 and forming actuators 195, 195' at the ends thereof. It is pivoted near the front end of both side plates with a pivot shaft 126, and
A top plate 191 of the operating member 190 is attached to the lower surface of the top plate of the handle 30, and a driver 1 is attached to the front end.
Both side elastic pieces 1 at the rear end of the leaf spring 142 having 40
44, 144' (see Figure 15).
Handle 30 and magazine unit 20 during paper binding
Due to the approaching movement of the top plate 191 of the actuating member 190
The same effect can be obtained even if the rear end portion 193 slides on the upper surface of the magazine unit 20, and the actuators 195, 195' press and retreat the passive cam 80 to move the slider 70 rearward. Is possible.

As mentioned above, the timing to release the prevention of the downward movement of the paper loading table is just before the driver completes pushing out the staples, so this timing is constant regardless of the amount of bound paper, so it is independent of the number of bound papers. Rather, the legs of the staple are folded flat against the underside of the binding sheet.

(Effects of the Invention) According to the present invention, it is possible to provide a staple folding device for a stapler that can fold the legs of the staple flatly to the bottom surface of the bound paper regardless of the number of bound papers.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal side view showing the handle in an open state;
Fig. 2 is a longitudinal side view showing the handle in a closed state, Fig. 3 is a sectional view taken along the - line in Fig. 2, Fig. 4 is a sectional view taken along the - line in Fig. 2, and Fig. 5 is a sectional view taken along the - line in Fig. 2. FIG. 6 is a perspective view of the paper loading table, FIG. 7 is a perspective view of the clincher member, and FIG. 8 is a partially cutaway perspective view of the front end of the base. , FIG. 9 is a perspective view of the driver and spring plate,
Fig. 10 is a perspective view of the operating member, Fig. 11 is a perspective view of the magazine cover, Fig. 12 is a perspective view of the magazine body, Fig. 13 is a perspective view of the slider, and Fig. 14 shows the handle in an open state. FIG. 15 is a perspective view of another driver, and FIG. 16 is a perspective view of another operating member. 10: Base, 20: Magazine unit, 30:
Handle, 40, 140: Driver, 50: Clincher member, 60: Paper mounting table, 64: Staple insertion opening, 70: Slider, 80: Passive cam, 90, 190: Operating member.

Claims (1)

[Scope of utility model registration request] In a stapler in which a handle equipped with a driver and a rear end of a magazine unit are pivoted to the rear end of the base, and a clincher member is installed at the front end, the stapler is attached to the front end of the base. A paper loading table having an opening for insertion is disposed so as to be movable up and down, and a slider that prevents the paper loading table from descending at the front end is placed on the top surface so as to be movable back and forth, and a passive cam is attached to the top surface of the slider. , an actuating member is attached to either the handle or the magazine unit, the rear end of which moves the slider backwards via a passive cam to release the prevention of the downward movement of the paper loading table when the handle and the magazine unit approach each other during paper binding; What is claimed is: 1. A staple folding device for a stapler, characterized in that the staple folding device for a stapler is pivoted to the stapler, and is configured such that an actuating member releases the prevention of descent of the paper mounting table immediately before the staple extrusion by the driver is completed.