JPS6214032Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an overlap prevention mechanism for a tape joining device for various tapes, which cuts a magnetic tape and joins another magnetic tape or a leader tape to the cut portion.

First, tape bonding will be explained with reference to FIG. 1 showing a typical bonding device.

1 and 2 are magnetic tapes, and 3 and 4 are first and second blocks, respectively, which are arranged so as to form a gap 5 therebetween. A pair of grooves 3a, 3b, 4a, 4b are formed in the blocks 3, 4, respectively, and an air intake hole 6 is provided in the grooves.
It is designed to hold and fix 2. A cutting blade 7 constitutes a cutting means for moving in the direction of arrow A, passing through the gap 5, and cutting the magnetic tapes 1 and 2. Therefore, as shown in FIG. 1a, the magnetic tapes 1, 2 to be cut and joined are held in the grooves 3a, 4a, 3b, 4b of the blocks 3, 4;
If the magnetic tapes 1 and 2 are fixed and the cutting blade 7 is moved in the direction of arrow A, the magnetic tapes 1 and 2 are cut at predetermined locations as shown in FIG. 1b. Then, as shown in FIG.
If a is matched, the cut portions of the magnetic tapes 1 and 2 will be opposed to each other. Thereafter, as shown in FIG. 1d, a splicing tape 8 is applied using a splicing head, which will be described later, to join the two.

However, in the past, when viewed from the side as shown in FIG. 2, as shown in FIG. 2a, the grooves 3b,
When the magnetic tape 2 (and the magnetic tape 1) held in the magnetic tape 4b (and the grooves 3a and 4a) is cut by the cutting blade 7 as shown in FIG. 2b, elongation occurs at the cut end. In this state, the other block 4 is displaced and the cut ends of the magnetic tapes 1 and 2 are made to face each other as shown in FIG. As shown in FIG. 2d, the magnetic tapes 1 and 2 overlap at the joint. This overlapping portion is, for example, the magnetic tape 1, 2.
When used as a video tape in a video tape recorder, it may get caught in the tape guide, magnetic head, etc., causing serious problems such as damage to the magnetic tape or accidents such as cutting.
In particular, elongation at the cut end is significant in thin magnetic tapes intended for long recording times.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a tape overlapping prevention mechanism for a tape joining device that eliminates the above-mentioned conventional drawbacks.

An embodiment of the present invention will be described below with reference to FIG. 3 and subsequent figures.

FIG. 3 is a plan view showing the main parts of the present invention,
An L-shaped arm 11 is provided rotatably by a support shaft 10, one end of this arm 11 is connected to the one block 3 via a shaft 12, and the other end is connected to air via a shaft 13. Piston shaft 1 of cylinder 14
5 are connected. 16 is the air cylinder 1
Panels 17a, 17b for fixedly supporting 4.
is an air supply port for alternately supplying air to cause the piston shaft 15 to reciprocate in the direction of arrow B. As shown in FIG. 4, the block 3 is placed on a mounting table 18 by being locked with a dovetail groove 19. In the dovetail groove 19, the block 3 is connected to the block 4, and the magnetic tape 1,
It has a gap 20 that allows movement by a distance that eliminates the overlapping portion of the two. A leaf spring 21 is inserted into this gap 20.

These dovetail grooves 19, gaps 20, and leaf springs 21 are
It constitutes a sliding means for sliding the first block 3.

With such a configuration, when the tape joining operation is viewed from the side as shown in FIG. 5, the magnetic tape 2 (held in the grooves 3b and 4b (and grooves 3a and 4a) Then, the magnetic tape 1) is cut with a cutting blade 7 as shown in FIG. 5b. The cut end stretches as shown in Fig. 5c, but as shown in Figs. 3 and 4, the air cylinder 14 is operated to rotate the arm 11 and move one block 3 in the direction of arrow c'. Displace it to. At the same time, the other block 4 is displaced in a direction perpendicular to the longitudinal direction of the tape so that the cut ends of the magnetic tapes 1 and 2 are opposed to each other. In this state, as shown in FIG. 5d, there is no overlapping part at the cut end, and while maintaining this state, the splicing head 9 is moved as shown in FIG. 5e.
The splicing tape 8 is attached using the following steps. In this pasted state, there is no overlapping portion at all, as shown in FIG. 5f. On the other hand, when the air cylinder 14 is operated to return, the block 3 is moved in the direction of arrow c and returned to its original position. Normally, a large play is likely to occur between the block 3 and the mounting table 18 due to the slight elongation of the cut end, but this is reliably absorbed by the leaf spring 21.

In the above-described embodiment of the present invention, one block 3 is moved by the air cylinder 14, but the other block 4 may be moved.

In addition, in the present invention, various moving means such as an electromagnetic plunger solenoid may be used instead of the air cylinder 14.

Furthermore, in the present invention, if the elongation of the cut end differs due to differences in the thinness of the magnetic tape, the material, etc., the width of the gap 20 of the dovetail groove 19 can be adjusted by a conventional adjustment means using a screw or the like. Of course, if this is made possible, various types of magnetic tapes can be effectively cut and joined.

Furthermore, it goes without saying that the present invention can be applied to joining various tapes other than magnetic tapes.

That is, as mentioned above, the present invention has a joining device for cutting a tape and joining it to another tape, which includes a pair of blocks having grooves for holding and fixing the tape and a gap between them. , a cutting means having a cutting blade for passing through the gap and cutting the tape, and a moving means for moving at least one of the blocks in the longitudinal direction of the tape only by eliminating the overlapping portion. Because of this, even if the cut end of the magnetic tape stretches, it will not overlap and be joined, making it extremely effective in eliminating the drawbacks of the conventional method.

Moreover, by implementing the present invention, the tape can be slid while fixed to the block to prevent overlapping, so it is possible to prevent overlapping at high speed and with a simple configuration, regardless of the tape thickness or material. Extremely useful.

[Brief explanation of the drawing]

Figures 1 a to d are perspective views showing a joining device for explaining the present invention, Figures 2 a to d are side views showing the conventional device in a cut and joined state, and Figure 3 is an embodiment of the present invention. A plan view of an overlap prevention mechanism of a tape joining device showing an example, FIG. 4 is a side view showing the main parts of FIG. 3,
Figures 5a to 5f show cutting in one embodiment of the present invention;
FIG. 3 is a side view showing a joined state. 1, 2...Magnetic tape, 3...First block, 4...Second block, 3a, 3b, 4a,
4b... Groove, 5... Gap, 7... Cutting blade of cutting means, 14... Air cylinder of moving means, 19...
...Dovetail groove, 20...gap, 21...plate spring.

Claims (1)

[Claims for Utility Model Registration] In order to cut the tape and join it to other tapes, the tape is provided with a plurality of longitudinal grooves capable of holding and fixing the tape, and the grooves abut each other in a straight line. and a pair of first and second blocks arranged with a gap therebetween, and a cutting means having a cutting blade that passes through the gap and cuts the tape held and fixed in the plurality of grooves. In the joining device, at least one of the first and second blocks includes a slide means that is slidable in the longitudinal direction of the groove, and a cut end of the tape cut by the cutting means along the slide means is attached to the block. An overlapping joining prevention mechanism for a tape joining device, comprising a moving means for sliding the tape until it is no longer overlapped.