JPH04109242A - Cutting device for photographic telemp - Google Patents

Abstract

PURPOSE:To securely cut the telemp with superior machining quality by pressing a cutting blade against a tool horn in ultrasonic vibrating motion with the same pressing force. CONSTITUTION:This device is provided with the tool horn 16 in ultrasonic vibrating motion and at least one cutting blade 6 which is pressed against the tool horn 16 to cut a web. The cutting blade 6 is fitted to a cutting blade holder 5 arranged rotatably and independently on a support shaft 4 provided on the base 2 of the cutting device 1 and is pressed against the tool horn 16 by an elastic body member 7 whose elastic force is adjustable through the cutting blade holder 5 so as to obtain the best cutting state in advance corresponding to the amplitude distribution of the tool horn 16. Consequently, there is no variance in machining quality and the web is securely cut.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a cutting device for photographic telescope used as a light-shielding material.

[Conventional technology]

Generally, a photographic telescope used as a light-shielding material has a flocked part 25b in which piles of black nylon material or the like are flocked on one side of a base cloth 25a and a predetermined thickness on the other side of the base cloth 25a, as shown in FIG. Adhesive 25 evenly applied
It is composed of c.

Then, there is a heat cutting method in which a wide web (telemp) coated with the adhesive 25c is cut with a pair of circular blades heated to a high temperature and the fibers are simultaneously welded, and a method using an ultrasonic vibrating tool horn and a cutting blade. Using cutting means such as an ultrasonic slitting method that cuts the fibers and welds the fibers, the photographic telescope 25, 26 is cut into pieces of predetermined size and finished.

As shown in the assembled cartridge film 20 loaded with the film scroll 21 in FIG. It is pasted at a predetermined position on the entrance/exit plane 23, 24 of the plate 22, and serves as a light shielding material for the film drawer portion of the cartridge film 20.

Conventionally, the heat cutting method mentioned above has been used for cutting telescopes, but due to its slow processing capacity, it is currently used in JP-A-1988-
Photographic telescopes are processed using a cutting device using the ultrasonic slit method proposed by No. 52,671. When the web 15 is cut into the telemp 25, 26, the base fabric 25a and the flocked portion 25b are cut.
It is carefully processed to avoid problems such as fraying of the threads, extrusion of the adhesive 25c from the cut end surface, adhesion of glue scum on the end surface, or incomplete cutting or welding.

In addition, to explain about glue scum, when hot melt is used as an adhesive, the hot melt melts locally due to the heat during cutting, and when it rubs against the tool horn, it becomes thread-like or bead-like. When it cools and solidifies, it becomes cloudy, which is called paste.

[Invention or problem to be solved]

However, the cutting device using the ultrasonic pickpocket method disclosed in JP-A-60-52671 has a structure in which a plurality of rotary blades or rubber are press-fitted into a rotating shaft lined with rubber, which exceeds the elastic deformation of the rubber. If there are variations in the diameter of the rotary blade, the pressing force against the tool horn will vary, resulting in poor cutting or poor welding. In addition, since the tool horn that vibrates ultrasonically has a unique amplitude distribution across the width of the cutting blades facing each other, the pressing force with the tool horn may vary depending on the position where the cutting blades are installed. Due to the difference in cutting and welding conditions, variations in processing quality such as incomplete cutting and incomplete welding occur.

The present invention solves these problems and eliminates the variation in the diameter of the cutting blade and the inherent vibration caused by ultrasonic vibration. An object of the present invention is to provide a cutting device for a photographic telescope that can reliably cut even a tool horn having a distribution without variations in processing quality.

[Means to solve the problem]

The purpose of this invention is to provide a cutting device for a wide web for terremp having a light shielding pile woven into one side of the base fabric and an adhesive coated on the other side, the cutting device being equipped with an ultrasonically vibrating tool horn and at least one cutting blade that presses against the tool horn to cut the web, and the cutting blade is rotatably arranged independently on a support shaft provided on the base of the cutting device. The elastic member is attached to a corresponding cutting blade holder and whose elastic force is adjustable via the cutting blade holder so as to obtain the optimum cutting condition in advance according to the amplitude distribution of the tool horn. This is achieved by a photographic telescope cutting device characterized in that the tool horn is pressed against the tool horn with the same pressing force.

〔Example〕

One embodiment of the present invention is shown in FIG. 1, a side view showing the configuration of a cutting device for a photographic telescope using an ultrasonic processing method, FIG. 2, a front view of the same, and FIG. This will be explained with reference to a diagram showing the position of each cutting blade with respect to the amplitude distribution.

However, the present invention is not limited to this example.

In order to eliminate the above-mentioned problems, the present invention improves a photographic telescope cutting device as described below. That is, as shown in FIG. 81 and FIG. 2, the cutting device 1 for cutting the wide web 15 for telemp has a support shaft 4 which is fixedly supported at both ends by supports 3 provided on both sides of a part of the upper surface of the base 2. and the support shaft 4
A plurality of cutting blade holders 5 that can be rotated by being fitted with one end thereof, a cutting blade 6 that is integrally attached to the mounting surface of the other end of each of the holders 5, and each of the cutting blade holders 5 are placed upwardly. It is constituted by a cutting blade holder 10 consisting of an elastic member 7 provided on the base 2 so as to be biased upward, and a tool horn 16 ultrasonically vibrated by an ultrasonic oscillator.

For example, the circular cutting blades 6 having the same diameter are integrally attached in parallel to the side surface of the cutting blade holder 5 provided at the position of the size to cut the wide web 15 for telemp. They are designed to rotate independently through the blade holder 5 in the directions indicated by arrows AA. The cutting blade 6 may be fixedly attached to the cutting blade holder as described above, or may be rotatably attached.

The elastic member 7 is, for example, a coil spring formed equally with a predetermined spring constant, and the coil spring 7 is integrally fixed to the base 2 with a bolt 9A and a nut 9B. It is fitted into a seat 8A at the tip of the pole 9A protruding from the upper surface of the base 2 and a guide shaft 8B.

The upper end surface of the coil spring 7 comes into contact with the lower surface of each of the cutting blade holders 5, and due to the elastic action of the spring 7, the cutting blade boulder 5 rotates around the support shaft 4 and is attached to its tip at the same time. The cutting blades 6 are also rotated so as to be able to move toward and away from the tool horn 16, so that they can be pressed against the tool horn 16 or the web 15 that is in contact with it with a desired pressing force.

On the other hand, the tool horns 16, which are ultrasonically vibrated by an ultrasonic oscillator, are attached to the frame of the cutting device 1 so as to be movable up and down in the direction of the cutting edge of the cutting blade 6 (indicated by arrow BB') by air cylinders (not shown). When the device 1 is driven, the cutting blades 6 are lowered to a predetermined position and pressed against the cutting edges of the waiting cutting blades 6 against the coil spring 7, thereby applying a predetermined pressing force to the tool horn 16. is pressed against the body.

The amplitude distribution of the ultrasonic vibrating tool horn 6 is as shown in FIG. It gradually decreases and becomes symmetrically the amplitude fi at any transition point.

Note that the illustrated amplitude distribution shows only one side.

Therefore, if the distance between the lower surface of the tool horn 16 and the cutting edge of each of the cutting blades 6 is set equal, even if the diameter of each of the cutting blades 6 and the spring constant of the coil spring 7 are equal, Due to the difference in amplitude, the distance between the tool horn 16 and the cutting edge of each of the cutting blades 6 is different, and the pressing force is different, which causes the above-mentioned problems in the processing quality of the photographic telescopes 25 and 26 that are cut. and variations occur.

Therefore, the amplitude distribution fmax-fi of the tool horn 16
The distance between the cutting edge of each of the cutting blades 6 located opposite to the lower surface of the tool pawn 16 is adjusted to a specific amplitude, for example, the cutting edge of the cutting blade 6 located opposite to the center of the tool horn J6 is adjusted. The cutting edge of the blade 6 is set at a distance S based on the maximum amplitude fmax, and the amplitude fi at the arbitrary position is set at a distance S based on the maximum amplitude fmax.
The position of the cutting edge of the cutting blade 6 facing the vibrating area is S
-(fmax(i)). Therefore, the correction amount is the difference d between the distance S set to the maximum amplitude fmax side and the distance S1 set to the amplitude fl side at an arbitrary position.

As a matter of course, the position of the cutting edge of the cutting blade 6 located at the maximum amplitude fmax and the arbitrary position amplitude f1 should be corrected in accordance with the opposing unique amplitudes.

After setting the position of the cutting edge of each cutting blade according to each amplitude that changes depending on the position of the horn, the horn is lowered and brought into contact with each cutting blade, and the horn is oscillated. As described above, the coil Since the spring 7 and the cutting blade 6 can be adjusted integrally, even if the cutting blade 6 has a variation in diameter, the amount of deformation of the coil spring when the tool horn 16 oscillates will be at the maximum value. amplitude fm
It can be made to correspond to ax+α (α is a constant) and can be kept constant.

Based on this principle, in the present invention, the amount of compression of the coil spring as an elastic body provided through the holder of each cutting blade is adjusted by the bolt 9A and nut 9B, so that the amplitude can be adjusted even at different positions. The horn and the cutting edge of the cutting blade are made to press against each other under the same pressure condition.

The telescope wide convergence web 5 is conveyed in the direction of arrow C shown in FIG. 1 by the photographic telescope cutting device L constructed as described above;
and the cutting blades 6, each of which rotates independently and presses against the lower surface of the tool horn 16 with an even pressing force, ensure cutting without variations in processing quality.

〔Effect of the invention〕

The photographic telescope cut according to the present invention can be reliably cut with extremely excellent processing quality without incomplete cutting or incomplete welding.

[Brief explanation of drawings]

FIG. 1 is a side view showing the configuration of a photographic telescope cutting device using an ultrasonic processing method according to an embodiment of the present invention. Figure 2 is a front view of the same. FIG. 3 is a diagram showing the position of the cutting blade with respect to the amplitude distribution of the ultrasonically vibrating tool horn according to one embodiment of the present invention. FIG. 4 is a sectional view showing the structure of a photographic telescope. FIG. 5 is a side sectional view showing the structure of the cartridge film. l... Telempu cutting device 2... Base 4... Support shaft 5... Cutting blade holder 6... Cutting blade
7... Elastic member 10... Cutting blade holding part 15... Wide convergence web for telemp 16... Tool horn 20... Patrone film 21... Film scrolls 23, 24... Entrance/exit plane 25, 26... Photographic telescope 25a... Flocking part

Claims (1)

[Claims] A cutting device for a wide web for terremp having a light-shielding pile woven into one side of the base fabric and an adhesive applied to the other side, the cutting device comprising a tool horn that vibrates ultrasonically and a tool horn that presses the tool horn. at least one cutting blade that cuts the web in contact with the web, and the cutting blade is rotatably arranged independently on a support shaft provided on the base of the cutting device. The tool horn is attached to the tool horn by an elastic member that is attached to the blade holder and whose elastic force can be adjusted through the cutting blade holder so that the optimum cutting condition can be obtained in advance according to the amplitude distribution of the tool horn. A cutting device for photographic telegraph, characterized in that the stamp is stamped by pressing force.