JPS5814714B2 - Manufacturing method of endless tape with holes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for manufacturing a perforated endless tape.

Conventionally, perforated steel endless tapes were produced by laser welding both ends of a perforated band-shaped tape 1, as shown in Figures 6 and 7. Since the thickness is extremely thin and a large number of holes 1a are drilled around the welded part 2, the thermal resistance of the welded part 2 is high, and welding defects such as melting of the groove part of the tape 1 are likely to occur. .

Therefore, as shown in Fig. 6, a method has been used to lower the thermal resistance by providing a welding allowance l at each end of the tape 1, as shown in Fig. 6, to obtain a good welded part 2. There was a drawback that the holes 1a were not provided around the portion 2, and the density of the holes 1a throughout the tape 1 was reduced.

Therefore, the present invention is constructed by abutting both end surfaces of a band-shaped tape without holes, welding it with a laser to form an endless tape, and then punching holes in the tape formed into an endless shape. However, it is an object of the present invention to provide a method for manufacturing a perforated steel endless tape that eliminates the above-mentioned drawbacks.

Hereinafter, the present invention will be specifically explained based on an embodiment shown in the drawings.

In order to manufacture a perforated steel endless tape, as shown in FIG. 1, a belt-shaped steel tape 1 without holes is used.
1b, 1b', 1b' are formed.

First, after performing predetermined bevel processing on both end surfaces 1c and 1c' of the tape 1, as shown in FIG.
′ and align the butted parts with a laser to ear 1.
b, 1b, 1b', 1b', ear 1b, Ib
Weld across the tape 1 from the tape 1 to the ears 1 b' and 1 b'.

At this time, since there are no holes or the like formed near both end surfaces 1c and 10' of the tape 1 that would impede heat conduction, the thermal resistance is low and laser welding can be performed in good condition.

When the welding of both end faces 1 c and 1 c' by laser is completed and the tape 1 is formed into an endless shape, the lugs 'ib, 1b, 1b', and 1b' are cut off as shown in FIG. Remove defective parts at the start and end of the weld bead of the weld section 2.

Next, a large number of holes 1a are made in the tape 1 using a laser to produce a perforated steel endless tape 3.
The hole 1a can also be easily made on the welding part 2.

Next, an example in which the perforated steel endless tape 3 manufactured according to the present invention is used as an AD converter will be described.

Conventionally, conversion tapes used in this type of A-D converter are known to be made of paper or plastic, but these tapes have low mechanical strength and have problems in terms of running life. Ta.

Therefore, if the perforated steel endless tape 3 manufactured by the above-mentioned invention is used as the conversion tape,
It can be used as a flexible conversion tape with high mechanical strength and a thin thickness.

As shown in FIG. 4, the A-D converter 5 has rollers 6 and 6' that are rotatably supported.
A large number of claws 5a, 6a' are formed on both sides of the cylindrical portion 6'.

A shaft 7 is fixed to the roller 6, and a pulley 9 is provided at the tip of the shaft 7.

A thread 10 is wound around the pulley 9, and by moving one end 10a of the thread 10 in the directions of arrows A and B,
A roller 6 rotates via a pulley 9 and a shaft 7.

A steel endless tape 3, which is a conversion tape, is attached to the rollers 6, 6', and the engagement holes 1d, which are aligned and drilled at regular intervals on both sides of the tape 3, are connected to the claws 5a of the rollers 6, 6'.
As shown in FIG. 5, the endless tape 3 has many holes 1a for AD conversion, as shown in FIG.

As shown in FIG. 4, a light emitting element 11 and a light receiving element 12 are provided between the rollers 6 and 6', sandwiching the tape 3 from above and below in the figure. 3 and 13' are connected, and cables 13 and 13' are further connected to the computing device.

Furthermore, as shown in FIG. 5, four endless tapes 3 are provided in parallel via a suitable drive mechanism.
From the right side of the figure, the 1st, 10th, 100th, and 1000th positions are available for A-D conversion up to 4 digits.

Since the A-D converter 5 has the above configuration, when one end 10a of the thread 10 moves a certain amount in the direction of arrow A or B as shown in FIG. , the pulley 9 rotates at a certain angle, and the roller 6 is rotated through the shaft 7 in a direction corresponding to the moving direction of the thread 10 at a certain angle.

When the roller 6 rotates, the endless tape 3 moves between the rollers 6 and 6' via the claw 6a of the roller 6 in a direction corresponding to the rotation direction of the roller 6.

Then, the hole 1a passes between the light emitting element 11 and the light receiving element 12 according to the amount of movement of the tape 3, and a predetermined digital signal is output from the light receiving element 12 to the computing device via the cable 13, and as a result, the thread 10 The analog movement amount is converted into a digital amount via the tape 3 and output.

As explained above, according to the present invention, the holes 1a are formed in the tape 1 after the both end surfaces 1c and 1c' of the unperforated band-shaped tape 1 are welded by laser, so that the tape 1 can be welded. To provide a steel endless tape 3 which not only eliminates the need to provide a welding allowance l, but also allows holes 1a to be freely formed in a welded part 2 after welding, and which has a high density of holes 1a. becomes possible.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a band-shaped tape, Figs. 2 and 3 are perspective views showing the process of manufacturing a perforated steel endless tape using the tape in Fig. 1, and Fig. 4 is a plan view showing a band-shaped tape. A perspective view of the case where the perforated steel endless tape manufactured according to the present invention is used in an A-D converter, FIG. 5 is an A-D
A plan view showing the arrangement of perforated steel endless tape in a converter, Fig. 6 is a plan view showing a conventional strip-shaped tape, and Fig. 7 shows a perforated steel endless tape using the tape in Fig. 6. FIG. 1... Band-shaped tape, 1a... Hole, 1c, 1c'... End surface, 3... Endless tape.

Claims (1)

[Claims] 1. Perforation characterized by forming an endless tape by welding both end surfaces of a belt-shaped tape with no holes together using a laser, and then punching holes in the tape formed into an endless shape. How to manufacture endless tape.