JPS6055280B2 - Office drilling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a punching machine for office use, and more particularly, to a punching machine for office use for punching holes in paper sheets at a constant pitch.

Normally, a punching machine that punches a large number of binding holes in paper sheets at a constant pitch has a base that supports a movable member having a large number of punching blades arranged in horizontal rows, which can move freely up and down. is made immobile by operating the operating handle, and a large number of punching blades held by the movable member simultaneously punch the same number of holes as the punching blades.

However, since it has a structure that simultaneously drills the same number of holes as the punching blade, it is not only complex and extremely expensive, but also large and heavy, making it difficult to use.

Further, as a punching machine which is designed to punch a large number of holes by sliding a slider with a single punching blade, for example, the one described in Japanese Utility Model Publication No. 48-26123 is known. ing.

However, in this conventional example, both the sliding of the slider and the positioning of the punching blade in the punching blade guide hole require manual operation.
In other words, the drilling operation must be performed manually by rotating a handle provided on the slider to engage the base-side rack and the slider-side gear, making the drilling operation extremely complicated. It was a difficult task.

The present invention was invented in view of the above-mentioned conventional problems, and allows for extremely simple operation, reliably drilling a large number of holes at a constant pitch, and a simple structure as well as a compact design. It is made to be lightweight, has a long and narrow shape, has a predetermined length, and is made to place paper sheets to be perforated on a base. The holes are arranged in rows, and the slider is slidably supported on the base, and the slider is moved along the lengthwise direction of the base by a feed spring installed between one lengthwise end of the base and the slider. While biasing the side end, a pressing operation body with a drilling blade fixed to the slider is supported freely toward and away from the base, and the pressing operation body is biased in the direction of separation by a return spring, and The base end of a control pawl having a locking portion at its tip that engages with the positioning hole is rotatably supported on the slider, and the control pawl is attached by the pawl in the direction of engagement with the positioning hole. Further, the control claw is provided with an extension portion extending from the base end in a direction opposite to the locking portion, and the pressing operation body is in contact with the extension portion, and the control claw is provided with an extension portion extending from the base end portion in a direction opposite to the locking portion, and the pressing operation body is in contact with the extension portion, and The device is characterized in that an interlocking body is provided that causes the control pawl engaged with the positioning hole to be disengaged from the positioning hole in conjunction with movement toward the table. Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a base made of an elongated metal plate having a predetermined length and on which a paper sheet S to be perforated is placed as described later. A bottom wall 11 and a pair of side walls 12 and 13 standing up from both sides of the bottom wall 11 in the width direction.
and lips 14, 15 protruding inward from the upper ends of these side walls 12, 13, the cross section is formed into a concave shape with a lip, and a single punching blade 2 is provided between the lips 14, 15. 3 is slidably supported in the longitudinal direction of the base 1, and the slider 3 is placed between one longitudinal end of the base 1 and the slider 3 in the longitudinal direction of the base 1. A feed spring 4 is interposed to urge the one end, and a large number of positioning holes 5 are arranged in a row at regular intervals in the length direction of the lip 14, and the other lip 1
An elongated paper presser 6 extending along the length of the base 1 is pivotally supported at one end in the length direction of the base 1.

The slider 3 is formed into a block shape, and is provided with a paper sheet insertion groove 31 on one side of its lower end.
Fitting grooves 32 and 33 for receiving the lips 14 and 15 are provided on both sides of the lower part of the 1, and a first through hole 34 that passes vertically across the insertion groove 31 and a first through hole 34 that is offset from the through hole 34 are provided. The perforating blade 2 is supported in the first through hole 34 so as to be vertically movable, and the second through hole 35 is provided in parallel with the second through hole 35 that penetrates in the vertical direction from the position where the perforating blade 2 is vertically movable. A guide pin 7 that can be thrust into one of the positioning holes 5 is supported so as to be freely movable up and down, while a control claw 9 that can be engaged with one of the positioning holes 5 is rotated on the side surface of the slider 3 via a horizontal shaft 8. The control claw 9 is supported to be freely movable and slidable in the axial direction of the horizontal shaft 8, and the control claw 9 is placed between the tip of the control claw 9 and the lower surface of the slider 3 in the direction of the lip 14; A pawl spring 10 is provided in the axial direction of the horizontal shaft 8 to bias the control pawl 9 in the direction of engagement with the positioning hole 5. the control pawl 9 to the pawl spring 1.
When the control pawl 9 is rotated against a force of 0, the end locking portion 9a of the control pawl 9 disengages the positioning hole 5 and prevents it from swinging in the axial direction of the horizontal shaft 8. be.

A regulating piece 91 is provided on the top surface of the tip of the control claw 9. Further, the upper ends of the punching blade 2 and the guide pin 7 project outward from the upper surface of the slider 3 and are fixed to the pressing operation body 20 by a fixing means such as a set screw, so that the pressing operation of the operation body 20 is performed. The drilling blade 2 and guide pin 7
At the same time, a return spring 21 is interposed between the upper surface of the slider 3 and the operating body 20, and the operating body 20 is supported on the base 1 so as to be freely close to and apart from each other. 1, so as to automatically move the drilling blade 2 and guide pin 7 upward, while engaging the control claw 9 with the operating body 20,
An actuating arm 22 constituting interlocking means for the control pawl 9 is provided, and the actuating arm 22 is moved out of the base of the control pawl 9 in conjunction with the movement of the operating body 20 toward the base 1. The control claw 9 is brought into contact with the extension portion 9b extending in the direction.
This is accomplished by rotating the positioning hole 5 in the direction of leaving the positioning hole 5. The feed spring 4 is made of a long coil spring, one end of which is fixed to the front surface of the slider 3 with a set screw, and the other end of which is fixed to the front surface of the slider 3 with a notch provided at one longitudinal end 1a of the base 1. In addition to being locked to the raised piece 16, the middle of the spring 4 is stretched around a roller 23 that is pivotally supported on the other end 1b of the base 1 in the length direction l. In addition, the paper presser 6
is formed into an inverted U-shape in cross section, one end in the length direction is pivoted to one end 1a of the base 1 via a pivot pin 24, and a paper sheet to be perforated at the other end is attached to the lip 15. It pivots the locking tool 25 that locks in the pressed state.

This locking tool 25 includes a mounting base 25a to the paper presser 6, a hook portion 25b extending downward from the base 25a and engaging with the end inner surface 15a of the lip 15, and the base 25a.
5a and an operating portion 25c extending upward from the hook portion 25b.
A spring 26 is interposed therebetween to urge the locking tool 25 toward the inner surface 15a of the end portion, and the locking state of the locking tool 25 is maintained by the spring 26.

In the figure, 27 and 28 are stoppers provided at both longitudinal ends of the base 1 to restrict the sliding range of the slider 3, and the stopper 24 is removable from the base 1. When the stopper 27 is disengaged, the slider 3 can be inserted between the lips 14 and 15, and the stopper 28 is formed by cutting and bending the end of the lip 14. However, the shapes of these stoppers 27 and 28 are not particularly limited.

Further, 29 is a cover that covers the operating body 20, 30 is a buffer that is attached to the paper presser 6, 40 is a stopper that is attached to the guide pin 7 and sets the upper limit of the guide pin 7, and 50 is the above-mentioned stopper. This is a lid that closes the open end of the other end 1b of the base 1. The present invention is constructed as described above, and when punching a large number of binding holes in a sheet of paper at a constant pitch, for example, the slider 3 is placed at one end 1a of the base 1, and the control claw 9 is moved as shown in FIG. While engaging the second positioning hole 5 in the row direction as shown in FIG. Open the presser foot 6 and place one side of the paper sheet S to be perforated between the paper presser foot 6 and the lip 1.
5 into the paper sheet insertion groove 31 of the slider 3 from between the upper surface of the slider 3, and then close the paper presser 6 and press the paper sheet S against the upper surface of the lip 15 with the paper presser 6. Next, the punching blade 2 and the guide pin 7 are simultaneously moved downward by the pressing operation 20, and the punching blade 2 punches one binding hole in the sheet S. At this time, the lower end of the guide pin 7 is inserted into the first positioning hole 5 in the row direction to reliably prevent the slider 3 from sliding accidentally during drilling, and The control claw 9 that was engaged with the positioning hole 5 of the operating arm 2 of the operating body 20 is
2 in the clockwise direction in FIG. 2, and the locking portion 9a of the control pawl 9 is disengaged from the positioning hole 5 as shown in FIG. As a result of this separation, the control pawl 9 is swung in the axial direction of the horizontal shaft 8 by the pawl spring 10, and its distal end locking portion 9a is positioned outside the inner peripheral line of the positioning hole 5, as shown by the imaginary line in FIG. It is displaced in the opposite direction. When the pressing operation of the operating body 20 is released, the return spring 21 automatically moves the drilling blade 2 and the guide pin 7 upward, thereby completing one drilling operation.

At this time, the feed spring 4 moves the slider 3 in the feed direction (
(X direction in FIG. 2), the locking portion 9a of the control pawl enters the next positioning hole 5, that is, the third positioning hole in the row direction, and the slider 3 is advanced one pitch. be. The locking portion 9a that has entered the positioning hole 5 is
The tip end surface contacts the inner peripheral edge of the positioning hole 5, and from this contact state, the force of the feed spring 4 causes the control claw 9 to
is swung in the axial direction of the horizontal shaft 8 against the force of the pawl spring 10, and is displaced outward from the center line It is displaced in the direction of the center line X along the inner circumferential edge of the positioning hole 5 and stopped on the center line X. By repeating the pressing operation of the operating body 20 and the release of the pressing operation, a large number of binding holes are punched at a constant pitch.

After completing a predetermined number of holes, in order to return the slider 3 to the side opposite to the feeding direction ((X direction in FIG. 2), move the slider 3 against the force of the feeding spring 4 to It slides in the direction.

At this time, the locking portions 9a of the control pawl 9 enter the respective positioning holes 5, but due to the return force for returning the slider 3, the pawl spring 10 is bent, and the locking portions 9a are pushed out of the positioning holes 5. It separates and slides on the upper surface of the lip 14. Furthermore, in the above explanation, the guide pin 7 was provided separately from the punching blade 2, but this guide pin 7 is not necessarily necessary.

Further, the positioning hole may be formed in a circular shape as shown in the figure, or may be formed in a rectangular shape or an oval shape. Any shape that allows positioning for each pitch may be used.

However, when the control claw 9 is used, when the drilling blade 2 is moved downward and then moved upward, the tip locking portion 9a of the control claw 9 is separated from the positioning hole 5, and the positioning hole 5
When the slider 3 is displaced outwardly from the inner circumferential edge of
It is created as if it were displaced in the direction. Further, in the above explanation, one punching blade 2 is provided, but a plurality of punching blades 2 may be provided.

In this case, for example, the pitch between the positioning holes 5 may be set to a large pitch corresponding to the number of punching blades 2. As described above, according to the present invention, the slider can be forcibly slid relative to the base by the feed spring installed between one longitudinal end of the base and the slider, and the slider By engaging the control pawl freely rotatably supported in the positioning hole, the sliding of the slider can be stopped and held, and furthermore, the pressing operation body can move in proximity with the pressing operation, that is, in conjunction with the drilling operation. Therefore, when punching a paper sheet, a plurality of binding holes can be punched automatically only by pressing the pressing operation body. ,
The drilling operation can be easily performed with one hand, and each drilling position can be reliably maintained at a constant pitch for each positioning hole pitch.

Further, the paper sheet to be perforated is placed on the base that supports the control claw slider so as to freely slide, and the paper sheet is perforated based on the movement of the slider within the length of the base. Since the mounting table on which the paper sheet is placed is not slidable, the working space required for punching the paper sheet only needs to be large enough to correspond to the installation area of the base.
Therefore, the work space can be made smaller compared to the above-mentioned system in which the mounting table is slidable.

Furthermore, since the perforation machine of the present invention has the paper sheet placed on the base and the slider slidably supported on the base,
There is no need to provide a special table for placing paper sheets in addition to the base.
Therefore, the configuration of the drilling machine can be made extremely simple.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a partially cutaway rear view, Fig. 3 is a sectional view taken along line ■-■ in Fig. 1, and Fig. 4 is a cross-sectional view taken along line ■-■ in Fig. 2. FIG. 5 is an enlarged sectional view taken along the line ■■ in FIG. 2, FIG. 6 is an enlarged sectional view taken along the line ■-■ in FIG. 2, and FIGS. 7 and 8 are explanatory views showing the operating state . 1...Base, 2...Drilling blade, 3...Slider,
5... Positioning hole, 9... Control claw, 20... Press operation body, 4... Feed spring, 9a... Locking part, 9b...
...Extension part, 10...Claw spring, 21...Return spring.

Claims (1)

[Claims] 1. A plurality of positioning holes are arranged in a row at a constant pitch in the length direction on a base having an elongated shape and a predetermined length on which paper sheets to be punched are to be placed, and a slider is installed on the base. A feed spring that is freely slidably supported on the base and is installed between one longitudinal end of the base and the slider biases the slider toward one longitudinal end of the base; A pressing operation body to which a drilling blade is fixed is supported with respect to the base so as to be freely close to and apart from the base, the pressing operation body is biased in a direction of separation by a return spring, and the tip of the pressing operation body is engaged with the positioning hole on the slider. The proximal end of a control pawl having a locking portion is rotatably supported, the control pawl is biased by a pawl spring in the direction of engagement with the positioning hole, and the control pawl is further provided with the base end. An extension portion extending from an end in a direction opposite to the locking portion is provided, and the extension portion is in contact with the pressing operation body, and the positioning hole is moved in conjunction with the movement of the operation body toward the base. A drilling machine for office use, characterized in that an interlocking body is provided for disengaging the control pawl that is engaged with the control pawl from the positioning hole.