JPS6339036Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous perforation device for perforating a running thin strip-like object, and particularly to a continuous perforation device for forming perforations in films, tapes, papers, etc. with high precision.

Conventionally, since perforation of a thin strip-like material such as a film needs to be performed at high speed from the viewpoint of manufacturing cost, a rotary perforation device has been put into practical use.

This rotary perforation device consists of a plurality of perforation structures, each consisting primarily of a pivoting punch carrier arm and a die, which are arranged sequentially around a rotatable web support wheel. are arranged in parallel.

Then, a cam mechanism that controls the movement of the punch carrier arm displaces the punch carrier arm of the structure toward the web support wheel as the web support wheel rotates, and the web such as the film that is traveling is transferred to the punch carrier. Punch a hole using the arm punch. Therefore, in conventional perforating devices, both the perforating punch held by the punch carrier arm of the structure described above and the inner surface of the die are formed in a straight line, and therefore, when perforating a thin web such as a film, Mechanically, clearance is required depending on the amount of overlap between the linear punch and the die (here, the amount of overlap between the punch and the die is the depth at which the punch fits into the die). This will affect the sharpness of the blade.

This means that the web, for example, photographic film,
When the film is transported in a photographing device or a processing device, accurate transport of the film is possible only when the perforation of the film accurately engages the teeth of the sprocket wheel mounted on these devices. Considering this, this is a very important problem, and it has been necessary to further improve the cutting quality when drilling with such a drilling device.

Therefore, an object of the present invention is to provide a continuous punching device that can perform sharp, high-precision holes with a small clearance between a punch and a die when continuously punching a thin strip-like object while it is traveling. be.

According to the present invention, the perforation punch is formed into an arc shape centered on the pivot position of the punch carrier arm, and the hole of the die to be fitted with the punch is also formed into an arc shape in the same manner as described above. In particular, it has been found that the clearance between the punch and die can be reduced regardless of the amount of overlap between the punch and die, and the cutting quality of the hole in the drilled web etc. is significantly improved. did.

The details of the present invention will be explained below with reference to the drawings.

Fig. 1 is a front view of a perforation structure in a continuous perforation device, Fig. 2 is a sectional view of a conventional perforation structure, and Fig. 3 is a front view of a perforation structure in a continuous perforation device.
The figure shows a sectional view of a perforated structure according to the present invention.
In Figures 1 and 2, 1 is a punch carrier arm, 2 is a die, 3 is a perforation punch, 4 is a shaft or pivot position, 5 is a link, 6 is a grooved cam, 7 is a web support wheel, and 8 is a clearance. , 12 is a perforation structure, 41 is a support, and in FIG. 3, 9 is a punch carrier arm with an arcuate tip, 10 is an arcuate perforation punch, and 11 is an arcuate hole that fits with the punch. The die 13 represents the perforated structure.

14 is an unperforated long web, such as a film, and 15 is a guide roller for guiding the film 14 to the web support wheel 7. Further, 16 is a guide roller for guiding the perforated film 18 to the next step, and 17 is a drive shaft of the web support wheel 7. Further symbols ABCDE
FGHIJKL indicates the individual positions of the grooved cams 6 into which the links 5 of the perforated structure provided around the plurality of web support wheels 7 fit.

Next, the operation of the continuous drilling device of the present invention will be explained based on an embodiment shown in the drawings.

First, the unperforated film 14 is moved to the guide roller 15.
and 16, the web is hung around the web support wheel 7 in a stretched state. The web support wheel 7 begins to rotate as the drive shaft 17 rotates, and the plurality of perforated structures provided around the wheel also rotate integrally with the wheel.

As the rotation progresses, the position of the grooved cam 6 corresponding to each perforation structure changes. For example, at position A of the grooved cam 6 where the film 14 first contacts the web support wheel 7, the links 5 of the perforation structure are at the position of the grooved cam 6 that is moved downward, so that the perforation punch 10 is moved away from the surface of the film 14. and
Drilling has not started yet. As the rotation progresses further and the perforation structure reaches the position D of the grooved cam 6, the link 5 comes to the position of the grooved cam 6 that is moved upward, and in conjunction with this, the perforation punch 10 moves the film 1.
Start drilling at 4. The perforation structure continues to rotate together with the web support wheel 7, and the grooved cam 6 reaches the position E.
While the grooved cam 6 is at the position corresponding to the position H, the perforation punch 10 continues to perforate the film 14, but as the rotation progresses further,
When the grooved cam 6 reaches position I, the link 5 moves downward again and the punch 10 leaves the surface of the film 14. When the film 18 reaches the position L, the perforated film 18 is guided by the guide roller 16, removed from the web support wheel 7, and conveyed.

In the perforating device of the present invention, the film 14, which is wound around the web support wheel 7, is attached to the grooved cam 6.
When the perforation punch 10 is in the position corresponding to position D to position H, the perforation punch 10 is rotated and conveyed together with the web support wheel 7 while being fitted into the perforation of the film 14, so that perforation work can be performed at high speed. Despite this, highly accurate perforation can be obtained.

FIG. 1 shows three of a number of perforation structures 12 arranged one after the other around a rotatable web support wheel 7 as a partial structure of a rotary continuous perforation device. There is. The individual perforation structures 12 are moved up and down by the links 5 and groove cams 6. To explain the individual perforation structures 12, in the conventional perforation structure 12, as shown in FIG. A punch carrier is a linear perforation punch 3 held by a punch carrier arm 1 which is pivotally attached to a support body 41 and rotates up and down about a shaft 4 by means of a grooved cam 6 and a link 5, which will be described later. As the arm 1 moves, the hole is fitted with a linear die 2 to perforate the thin strip-shaped material.

Therefore, in such a configuration, the deeper the hole punch 3 is fitted into the die 2, the more the clearance 8 between the hole punch 3 and the die 2 is required. Therefore, in a continuous perforation device as shown in FIG. 1 in which such structures 12 are arranged in a circular shape around the web support wheel 7, a web such as a film, etc., which is traveling while being wound around the web support wheel 7, is perforated. If carried out, the clearance 8
Therefore, the sharpness of the hole becomes worse. Therefore, referring to FIG. 3, in the device of the present invention, the perforating punch 10 is formed into an arc shape centered on the pivot point between the punch carrier arm 9 and the support body 41, that is, the shaft 4, and The perforation structure 13 is configured so that the perforation punch 10 having an arcuate shape is fitted into a die 11 which is also formed into an arcuate shape by using the vertical movement of the grooved cam 6 and link 5 while holding the perforation punch 10 . At this time, the radius of curvature of the arcuate surface on the side near the pivot position of the die and punch is 49.509 mm, the thickness of the die is 2.818 mm, and the radius of curvature of the surface on the far side is:
It was set to 52.327mm.

In such a configuration, the punch 10 and the die 1
No matter how deep the fitting with 1 overlaps, the above-mentioned clearance 8 is not required at all, so a perforation with excellent cutting quality can be obtained during drilling. Furthermore, in conventional equipment, the clearance amount is 0.04−
What used to be 0.05 mm was reduced to 0.005 mm by using the device of the present invention. This has made it possible to carry out highly accurate drilling work, including accurate feeding of the strip and sharpness of the drilling.

As described above, the present invention changes the shape of the punch and die in the conventional continuous drilling device from a straight line to an arc shape, which improves the sharpness of the hole, which is related to the accuracy of perforation, and improves the drilling process. It was also possible to prevent the scattering of webbing waste during the process, resulting in an improvement in work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a part of the perforation structure in a rotary continuous perforation device, Fig. 2 is a sectional view of a conventional perforation structure in the same device, and Fig. 3 is a perforation structure related to the main part of the present invention. 4 in the cross-sectional view of the construct.
The figure is a schematic front view showing the overall configuration of the continuous drilling device of the present invention. 1,9...Punch carrier arm, 2,11...Die, 3,10...Drilling punch, 4...Shaft, 5...
Link, 6...Groove cam, 41...Support.

Claims (1)

[Scope of utility model registration request] A rotatable web support wheel on which a plurality of dies are disposed on the circumference, and a rotatable web support wheel, which is pivotally attached to the support provided on the wheel circumference corresponding to each die, and has a perforation at the tip. a plurality of perforating punch carrier arms having punches, links and slotted cams, the links engaging stationary slotted cams and portions of the perforating punch carrier arms opposite the punches so that the support wheel rotates; A device that moves up and down by the link, pivots the perforation punch carrier arm by the movement of the link, and accordingly, the tip of the perforation punch engages with the die to continuously perforate a thin strip-shaped object placed on the wheel. The perforation punch has an arc shape whose center is the pivot position of the perforation punch carrier arm and the radius is the length of the perforation punch carrier arm and its tip, and the die is fitted with the perforation punch. A continuous perforation device for a thin strip-like material, characterized in that the holes are formed in an arc shape similar to the perforation punch carrier arm, and the web is conveyed by engagement between the die and the perforation punch.