JP2000301492A - Punch unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify machining of a frame, to reduce the number of sheet-metal parts as much as possible, and also to perform rapid and easy assembly. SOLUTION: This punch unit comprises a punch frame 2 and a die frame 3; a punch shaft 9 rotatably supported by the punch frame 2; a die shaft 15 rotatably supported by the die frame 3; a plurality of punches 11 mounted on the punch shaft 9; and a plurality of die 19 mounted on the die shaft 15. By rotating the punch shaft 9 and the die shaft 15, the die 19 and the punch 11 are engaged with each other and form a punch hole in a sheet medium. In a so formed punch unit 1, the bodies of the punch frame 2 and the die frame 3 are formed of a cylindrical integrally molded member having a closed section. By remarkably reducing the number of parts, the number of assembly man-hour is eminently reduced compared with assembly of a number of conventional sheet-form parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch unit which is mounted on a copying machine or the like and punches a punched hole in a copied printing paper or the like.

[0002]

2. Description of the Related Art Conventionally, a punch unit of this type has a punch shaft and a die shaft attached to a frame assembled from a large number of sheet metal processed plate-like parts. Guide plate was provided. Each shaft was supported by a plurality of bearings provided between a plurality of punches and a die.

[0003]

However, assembling and manufacturing a frame from a large number of plate-shaped parts is not only complicated, but also requires an increase in the number of attached sheet metal parts such as a guide plate for punching chips. However, there is a disadvantage that it takes a lot of trouble. Further, since the bearings for supporting each shaft are provided between the punch and the die, the assembling procedure is complicated and time-consuming.

[0004] In view of the above circumstances, an object of the present invention is to provide a punch unit in which the processing of the frame is simple, the number of sheet metal parts can be reduced as much as possible, and the assembling thereof can be performed easily in a short time. Is what you do.

[0005]

According to the present invention, there is provided a punch frame (2) and a die frame (3), a punch shaft (9) rotatably supported by the punch frame (2), and A die shaft (15) rotatably supported by a die frame (3); a plurality of punches (11) mounted on the punch shaft (9); and a plurality of dies mounted on the die shaft (15). (19)
And the punch shaft (9) and the die shaft (1).
In the punch unit (1), which is capable of engaging the die (19) with the punch (11) by rotating the punch (5) to form a punch hole in the sheet medium, the punch frame (2) and the die The body (2) of the frame (3)
a, 3a) are formed by a cylindrical integrally molded member having a closed cross section.

According to a second aspect of the present invention, the main bodies (2a, 3a) of the punch frame (2) and the die frame (3) are provided.
Is composed of an extruded or drawn aluminum member.

According to a third aspect of the present invention, the die shaft (1
5) is rotatably supported by the die frame (3) at both ends of the die frame (3), and the punch shaft (9) is mounted on the punch frame (2) by the punch frame (2). ) Are rotatably supported at both ends.

According to a fourth aspect of the present invention, at least one punch residue guide surface (3h) is integrally formed inside the main body (3a) of the die frame (3) together with the main body. .

According to a fifth aspect of the present invention, the die (19) comprises:
The die holder (17) is mounted on the die shaft (15) via a cylindrical die holder (17). The die holder (17) has a cut for reducing the radial dimension (W2) of the die holder (17). A notch (17b) is formed.

[0010] The invention according to claim 6 is characterized in that the notch (17)
b) is formed at a plurality of positions of the die holder (17).

According to a seventh aspect of the present invention, the main body (2a, 3a) of the punch frame (2) and the die frame (3) is provided.
Is formed from a bent plate material (23).

[0012]

According to the first aspect of the present invention, the punch frame (2) and the main body (2a, 3a) of the die frame (3) are formed by a cylindrical integrally molded member having a closed cross section.
Compared to the case of assembling and forming a conventional frame from many plate-like parts, processing is extremely easy, not only can the number of parts be greatly reduced, but also the method of assembling many conventional plate-like parts In comparison, the number of sheet metal parts is greatly reduced, and the number of assembly steps can be significantly reduced.

Further, the punch frame (2) and the die frame (3) having a closed cross section can exhibit high rigidity, and can exhibit sufficient strength to withstand punching operation even with an integrally molded member having a thin cross section. The product can be made lighter.

According to a second aspect of the present invention, there is provided a punch frame (2).
In addition, the main body (2a, 3a) of the die frame (3) can be processed in one process by extrusion or drawing, and the number of processing steps can be greatly reduced.

According to a third aspect of the present invention, a punch shaft (9) is provided.
And the die shaft (15) is rotatably supported at both ends of the punch frame (2) and the die frame (3), so that the bearing is arranged between the punch and the die as in the related art. This eliminates the necessity, and the assembly work can be performed easily and quickly.

According to the fourth aspect of the present invention, since the punch residue guide surface (3h) is formed integrally with the main body, there is no need to attach the sheet member processed punch residue guide plate to the frame as in the prior art. Not only can the structure of the frame be simplified, but also the assembly operation can be performed easily and quickly.

According to the invention of claims 5 and 6, the notch (1)
According to 7b), the dimension (W3) of the die frame can be formed to be small in accordance with the dimension (W2) of the notch (17b) of the die holder (17), which contributes to the light weight and small size of the die frame (3). I can do things.

According to the invention of claim 7, the body (2a, 3a) of the die frame (3) and the punch frame (2) can be integrally formed by sheet metal working from a single plate material (23).

The numbers and the like in parentheses are for convenience of indicating corresponding elements in the drawings, and therefore, the present description is not limited to the description on the drawings.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a punch unit 1 has a punch frame 2 and a die frame 3 arranged and positioned in parallel with each other by side plates 4A and 4B. As shown in FIG. 3, each of the main bodies 3 has a cylindrical main body 2a, 3a having a box-shaped closed cross section integrally formed of an extruded (or drawn) aluminum material. In addition, the side plates 4A, 4
B is screwed via screws screwed to the ends of the grooves 2f, 3f described later.

The main bodies 2a, 3a are formed on their outer peripheral portions with punch-facing surfaces 2b, 3b facing each other. Between the punch-facing surfaces 2b, 3b, the medium passing space 5 is provided with the aforementioned side plate 4A. , 4B to form a predetermined gap W. The guide surface 2 is located on the right side of the punch facing surfaces 2b and 3b in FIG.
c, 3c define the medium passage space 5 as the punch facing surface 2b, 3b.
It is formed so as to widen outward from the side toward the right side in the figure.

On the left side of the medium passage space 5 in the figure, the punch facing surfaces 2b and 3b are formed to extend to the left in the figure to form a medium discharge portion 6. Further, the punch facing surfaces 2b and 3b are formed.
1 is the direction of the axis of the main bodies 2a, 3a,
Three sets of punch projecting holes 2d and die projecting holes 3d are formed at predetermined intervals in the direction B so as to face each other.

Under the die protruding hole 3d in FIG. 1, a punch chip discharging hole 3e is formed so as to correspond to each die protruding hole 3d, and the punch chip discharging hole 3b is shown in FIG. Thus, it is provided on the paper discharge section 6 side of the main body 3a.

At the three corners of the main bodies 2a, 3a, as shown in FIG. 3, grooves 2f, 3f are formed in three directions A and B in the axial direction of the main body. A punch residue 7 is provided in the lower left position of the groove 3f corresponding to the punch residue 3e. The V-shaped engaging portion 7a is formed on the punch residue 7 and the engaging portion 7a is elastically engaged with the groove 3f as shown by the broken line in FIG. A punch residue 7 is detachably attached to the die frame 3.

The tip of the punch rod 7 is bent to form a scraping portion 7b. As shown in FIG. 4, the tip of the scraping portion 7b is inserted into a die holder 17 described later. Have been.

On the inner side of the main body 3a of the die frame 3, a punch residue guide surface 3h is formed obliquely in the direction of the arrow C in FIG.
The guide surface 3h, the grooves 2f, 3f and the like are integrally formed by extrusion or pull-out when forming the main bodies 2a, 3a.

A punch shaft 9 is rotatably supported on the main body 2a of the punch frame 2 via bearings 10 and 10 provided on side plates 4A and 4B on both sides of the main body 2a. The diameter of the punch support 9b at the center is larger than the diameter of the bearings 10a and 10a supported by the bearing 10 of FIG. In the punch supporting portion 9b, three punches 11 are provided in each of the punch projecting holes 2.
The punches 11 can be simultaneously projected from the punch projecting holes 2d only once in the direction of the die projecting holes 3d during one rotation of the punch shaft 9 while the punches 11 are fixed by mounting screws 12 in a shape corresponding to the shape d. .

A gear 13 is fixed to the right side of the punch support 9 in FIG. 1, and the gear 13 is engaged with a gear 16 provided at one end of a die shaft 15. Die shaft 15
Are mounted on the die frame 3 with the side plates 4A and 4B and the bearing 1
Both ends are rotatably supported via 0 and 10. The die shaft 15 is also similar to the punch shaft 9,
Bearing portions 15 supported by bearings 10 at both ends
a, 15a and a central portion of the die supporting portion 15b. The diameter of the central portion of the die supporting portion 15b is larger than the diameter of the bearing portions 15a, 15a. Die support 15b
, Three die holders 17 are fixed by mounting screws 12 so as to correspond to the respective die projecting holes 3d, and the die 19 mounted on each die holder 17 is attached to the die shaft 1.
During one rotation of 5, it is possible to project simultaneously from each die projection hole 3 d in the punch projection hole 2 d direction only once.

As shown in FIGS. 3 and 4, the die holder 17 has a substantially cylindrical main body 17a.
Is formed with a cylindrical portion having a diameter D and a cutout portion 17b formed by cutting the cylindrical portion. This notch 17
3B, the radial dimension W2 of the cutout portion 17b of the die holder 17 is smaller than the diameter D, and is the punching direction of the main body 3a of the die frame 3 in FIG.
It is formed smaller than the vertical inner dimension W3.

A solid disk-shaped shaft support portion 17c is formed on the main body 17a, and a hollow cylindrical die support portion 17d is formed on the right side of FIG. 4 of the shaft support portion 17c. . A die 19 is provided in a cylindrical portion of the die supporting portion 17d so as to penetrate the die supporting portion 17d in the direction of the die shaft 15, and a shaft hole 17e penetrates in the center of the main body 17a in the directions of arrows A and B. Has been drilled. The above-mentioned die shaft 15 is inserted into the shaft hole 17e, and each die holder 17 is fixed to the die shaft 15 by the mounting screw 12 screwed to the main body 17a.

The punch shaft 9 and the die shaft 15 are rotatably supported in the punch frame 2 and the die foom 3 in a state where the punch 11 and the die holder 17 are mounted without interfering with the inner surface of the main body. Each of the corresponding punches 11 and the dies 19 is rotated so that each of the punches 11 and the die 19 simultaneously engages with the corresponding dies 19 as shown in FIG. The meshing phases of the gears 9 and 15 and the gears 13 and 16 are adjusted. The die shaft 15
1 protrudes leftward from the die frame 3 and forms an input shaft 15c.

Since the punch unit 1 has the above-described configuration, a sheet medium such as paper (not shown) is carried in from the direction of arrow E in FIG. 3 and the medium passing space between the punch frame 2 and the die frame 3 of the punch unit 1. 5 is inserted. In the medium passage space 5, the entrance is formed by the main body 2a,
The sheet medium is smoothly formed by the guide surfaces 2c and 3c formed in the medium passage space 3a.
It is inserted in the form guided inside. At the time when the sheet medium is inserted into the medium passage space 5, the die 19 and the punch 11 are not in a state facing the medium passage space 5,
The tip of the punch 11 has a main body 3 a in the punch frame 2.
Inside, the die 19 is also positioned inside the main body 3a of the die frame 3 by the die holder 17 in a retracted state. Therefore, when the sheet medium is inserted into the medium passage space 5, the medium is inserted into the die 19 and the punch 11. It is inserted smoothly without getting caught.

When the sheet medium is inserted into the medium passage space 5 and stopped at a predetermined position, driving means such as a motor (not shown) is driven to rotate the input shaft 15c of the die shaft 15 in the direction of arrow C. Let it. Then, the die shaft 15 also starts rotating in the C direction together with the die holder 17, and the punch shaft 9 is also rotated through the gears 16 and 13.
The rotation starts in the direction of FIG. 3F. When the die shaft 15 and the punch shaft 9 rotate, the die holder 17 and the punch 11 also start moving in the directions of arrows C and F.
The sheet medium protruding from the punch projecting hole 2d and the die projecting hole 3d into the medium passage space 5 and inserted into the medium passage space 5 is sandwiched from both upper and lower sides in FIG.
Fits into the die 19 and punches a punch hole in the sheet medium.

Further, when the die shaft 15 and the punch shaft 9 continue to rotate and the die holder 17 and the punch 11 also continue to rotate in the directions of arrows C and F, the punch 11 separates from the die 19 again and stops at a predetermined position. . At this time, the punch residue 21 punched by the punch 11 falls into the cylindrical die supporting portion 17d of the die holder 17, as shown in FIG.

The punched sheet medium is carried out to the left in FIG. 3, and then the punch 11 and the die 19 successively punch the sheet medium to be punched again from the right side in the figure. The operation is performed. When the punching operation is continuously performed in this manner, the punch residue 21 is stuck in the space 22 between the die 19 and the die shaft 15 of the die holder 17 as shown in FIG. As described above, since the scraping portion 7b at the tip of the punch residue discharge rod 7 has been fitted,
Even if the punch residue 21 is stuck in the space 22 between the die 19 and the die shaft 15 of the die holder 17,
Each time the die holder 17 rotates, the punch residue 21 scrapes the clogged punch residue 21 to the outside of the die holder 17, so that the punch residue 21 is clogged in the die holder 17, and a new punch residue 21 from the die 19 is removed. It is possible to prevent a situation in which the ejection becomes difficult and the punch operation becomes unstable.

Further, the die frame 3 is moved from the die holder 17 to the die frame 3.
The punch residue 21 discharged into the body 3a of the
It moves in the direction of arrow C while being guided by the punch residue guide surface 3h formed inside a, and is discharged outside through the discharge hole 3e.

The punching operation by the punch unit 1 is performed as described above. When assembling the punch unit 1, the following procedure is performed.

First, the punch 11 is mounted at a predetermined position on the punch shaft 9 by the mounting screw 12, and the die holder 17 with the die 19 mounted is mounted on the die shaft 15.
At a predetermined position with a mounting screw 12. In this state, the punch shaft 9 and the die shaft 15 are inserted into the punch frame 2 and the die frame 3, and the side plates 4A,
4B, rotatably supported in the frames via bearings 10. At this time, the diameter D of the cylindrical portion of the die holder 17 is larger than the inner dimension W3 of the main body 3a of the die frame 3 in the vertical direction in FIG.
Cannot be inserted into the die frame 3, but as described above, the die holder 17 has the radial dimension W2.
However, since the notch 17b smaller than W3 is formed, the die shaft 15 is inserted into the main body 3a of the die frame 3 in a state where the notch 17b is positioned below in the figure as shown in FIG. And the die holder 17 and the die frame 3 do not interfere with each other,
The assembly operation can be performed smoothly.

When the die shaft 15 and the punch shaft 9 are inserted into each frame, the die 1
The phases of the punch 9 and the punch 11 are adjusted, the gears 13 and 16 are mounted, and the assembly is completed.

The discharge holes 3e formed in the die frame 3 are provided depending on the installation state of the punch unit 1 and the insertion direction of the sheet medium, if the punch residue 21 can be discharged to the outside of the die frame 3. It may be formed at any position. For example, it may be formed at a position indicated by an arrow G in FIG.

Further, the guide surface 3h of the punch residue may be any one of the insides of the main body 3a of the die frame 3 depending on the installation state of the punch unit 1, the direction of insertion of the sheet medium, and the flow of the punch residue due to the rotation direction of the die holder 17. It may be formed at such a position, or may be formed at a plurality of locations in the cross section of FIG. 3, for example, at a position H on the right side as well as the left side of the die holder 17 in FIG.

Further, the shape, number and position of the notches 17b formed in the die holder 17 are determined by the die holder 1
It is optional as long as the radial dimension W2 of the die holder 17 can be made smaller than the diameter D of the cylindrical portion of FIG. For example, as shown in FIG.
7b and 17b can be formed on both sides of the die holder 17 at a pitch of 180 °.

Further, as long as the main bodies 2a and 3a of the die frame 3 and the punch frame 2 are integrally formed into a cylindrical shape having a closed cross-sectional shape, they are not limited to aluminum extruded or drawn materials, and are shown in FIG. As shown in FIG. 6, a single plate member 23 may be formed by bending a single sheet metal into a cylindrical shape without being divided into a plurality of parts.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a punch unit.

FIG. 2 is a bottom view of FIG. 1;

FIG. 3 is a sectional view taken along the line II of FIG. 1;

FIG. 4 is an enlarged sectional view of a die holder part of the punch unit in FIG. 1;

FIG. 5 is a sectional view showing another example of the punch unit.

FIG. 6 is a perspective view showing another example of a die frame and a punch frame.

FIG. 7 is a development view of the die frame and the punch frame of FIG. 6 when sheet metal processing is performed.

[Explanation of symbols]

 Reference Signs List 1 punch unit 2 punch frame 3 die frame 2a, 3a main body 3h punch residue guide surface 9 punch shaft 11 punch 15 die shaft 17 die holder 17b cutout portion 19 die 23 plate material W2 dimensions

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Susumu Ishii 777-1, Unane, Takatsu-ku, Kawasaki-shi, Kanagawa F term (reference) 3C060 AA02 BA01 BD03

Claims (7)

[Claims] 1. A punch frame and a die frame, a punch shaft rotatably supported by the punch frame, a die shaft rotatably supported by the die frame, and a plurality of punches mounted on the punch shaft. And a plurality of dies mounted on the die shaft. By rotating the punch shaft and the die shaft, the die and the punch can be engaged to punch a punch hole in the sheet medium. In the punch unit, the punch frame and the main body of the die frame are formed of a cylindrical integrally formed member having a closed cross section. 2. The punch unit according to claim 1, wherein the body of the punch frame and the die frame is an extruded or drawn aluminum member. 3. The die shaft is rotatably supported by the die frame at both ends of the die frame, and the punch shaft is rotatably supported by the punch frame at both ends of the punch frame. The punch unit according to claim 1, wherein 4. The punch unit according to claim 1, wherein at least one punch residue guide surface is integrally formed with the main body inside the main body of the die frame. 5. The die is mounted on the die shaft via a cylindrical die holder, and the die holder is formed with a notch for reducing a radial dimension of the die holder. The punch unit according to claim 1, wherein 6. The punch unit according to claim 5, wherein the notch is formed at a plurality of positions of the die holder. 7. A body of the punch frame and the die frame is formed from a bent plate material.
The punch unit according to claim 1.