JPH04137579U - tape reel - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent deformation of the central protrusion that engages with the clamp piece when driving the clamp piece into the cylindrical hub of the tape reel. [Structure] A through hole 9 is formed in the lower flange 2 integrally formed with the cylindrical hub 1 in a portion facing the central protrusion 8 which is also integrally molded with the cylindrical hub. Separated.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a tape reel for winding magnetic tape or the like.

0002

[Conventional technology]

Special Publication No. 57-13063 as a tape reel for winding conventional magnetic tape There are some things mentioned in the report. This prior art is shown in FIGS. 4 to 6. A lower flange that guides the tape is attached to one side of the cylindrical hub 101 around which the tape is wound. A separate upper flange 103 is attached to the other side by welding or the like. I'm wearing it.

0003 The clamp piece, which is one member that locks the tape end of the tape reel, The structure of the base 104 is such that legs 105 are formed on both sides, and the tips of the legs 105 are engaged. The cylindrical hub 101 has two clamp grooves 107 formed in the central protrusion. The central projection 108 has an undercut portion 108a at its tip. A side locking portion 107a is formed on the cylindrical hub 101, and a side locking portion 107a is formed on the cylindrical hub 101. The engaging portion 106 of the pump piece 104 forms a fitting portion into which the engaging portion 106 can be fitted.

0004 Thus, the clamp piece 104 is engaged in the clamp groove 107 of the cylindrical hub 101. By pushing in the mating part 106, the engaging part 106 of the clamp piece 104 aligns with the central protrusion. When passing through the undercut part 108a of the raised part 108, the engaging part 106 and the center The protrusion 108 deforms in the direction of the arrow in FIG. By restoring after passing through a, the clamp piece 104 engages with the cylindrical hub 101. Clamp the end of the tape.

[0005]

[Problem that the idea aims to solve]

However, in the conventional tape reel as mentioned above, the cylindrical hub Since the central protrusion is integrally formed with the lower flange, the lower end of the central protrusion hardly changes. excessive force is required when driving the clamp piece, and in some cases It may become impossible to drive or cause poor driving, and the center protrusion or lower The deformed part of the flange may be damaged, or the amount of deformation may vary in the width direction, causing wrinkles in the tape. It may occur.

[0006]

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention has been developed to solve the above problem. The central protrusion was separated by means such as providing a through hole.

[0007]

[Effect]

Lower flange integrally molded with tape reel cylindrical hub and clamp piece engagement Since the central protrusion for clamping is separated, the central protrusion is The structure deforms with a small force.

[0008]

【Example】

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, Figure 1 shows the present invention. FIG. 2 is an enlarged cross-sectional view taken from the direction A-A in FIG. 1. 3 is a sectional view taken along the line B--B in FIG. 2.

[0009] The tape reel guides the tape to one side of the cylindrical hub 1 around which the tape is wound. The lower flange 2 is integrally formed, and the upper flange 3, which is a separate part, is attached to the other side by welding or the like. and engage the clamp piece 4 with the fitting part 1a formed on the outer periphery of the cylindrical hub 1. This structure locks the end of the tape.

0010 The clamp piece 4 has legs 5, 5 on both sides, and the ends of the legs 5 are engaged with each other. A fitting part 6 is formed, and two clamp grooves 7 are formed in the fitting part of the cylindrical hub 1 by a central protrusion. 8, an undercut portion 8a is formed at the tip of this central projection 8, and An outer locking portion 7a is provided at the open end of the fitting portion of the cylindrical hub 1.

[0011] Furthermore, as shown in Fig. 3, the lower flange 2 integrally formed with the cylindrical hub has a central protrusion. A through hole 9 is formed by cutting out the portion facing 8, 8, and the lower flange 2 and the central protrusion 8 are , 8 are separated.

0012 With the above configuration, the clamp piece 4 is driven into the cylindrical hub 1 and the When locking the end of the clamp, the engaging part 6 of the clamp piece 4 engages the undercup of the central protrusion 8. When passing through the gating portion 8a, the engaging portion 6 of the clamp piece 4 moves in the direction of the arrow a in FIG. The center protrusion 8 of the cylindrical hub 1 is deformed in the direction of arrow b in the figure, and the engaging portion 6 is released. After passing through the darcut part 8a, the engaging part 6 and the central protrusion 8 are restored, so that the engaging part 6 and the central projection 8 are restored. The joint portion 6 fits into the clamp groove 7, and the clamp piece 4 is locked to the cylindrical hub 1. Clamp the end of the tape.

[0013] At this time, a through hole 9 is formed in the lower flange 2 to separate it from the central projection 8. Therefore, the central protrusion 8 can be freely deformed and is connected to the lower flange 2. Since there will be no deformation defects as would occur when the clamp piece 4 is 7 can be fitted. Note that the lower flange 2 and the central protrusion 8 are separated from each other at the upper The present invention is not limited to the above embodiments.

[0014]

[Effect of the idea]

As explained above, according to the present invention, the cylindrical hub of the tape reel and the integrally molded The central protrusion for engaging the clamp piece is integrally molded with the cylindrical hub as well as the flange. Since the origin is separated, the deformation of the central protrusion is inhibited when driving the clamp piece. If the clamp piece is driven in, excessive force is required or it becomes impossible to drive it in. There will be no damage to the central protrusion or lower flange. Also, wrinkles do not occur in the tape due to differences in the amount of deformation in the width direction.

[Brief explanation of drawings]

[Fig. 1] Partially cutaway front view of a tape reel according to the present invention

[Figure 2] Enlarged cross-sectional view of Figure 1 viewed from the A-A direction

[Figure 3] Cross-sectional view taken along line B-B in Figure 2

[Figure 4] Front view of conventional tape reel

[Fig. 5] Enlarged sectional view of Fig. 4 viewed from the C-C direction

[Fig. 6] Cross-sectional view taken along line D-D in Fig. 5

[Explanation of symbols]

1... Cylindrical hub, 2... Lower flange, 3... Upper flange, 4
...clamp piece, 6...engaging portion, 7...clamp groove, 8...
Central projection, 9...through hole.

Claims (1)

[Scope of utility model registration request] Claim 1: A clamp piece that integrally forms a lower flange on one side of a cylindrical hub, attaches an upper flange to the other side, and locks an end of a magnetic tape or the like on the outer periphery of the cylindrical hub. In the tape reel having a fitting portion, the fitting portion of the cylindrical hub is provided with a central protrusion integrally molded with the cylindrical hub, and the central protrusion is separated from the lower flange. tape reel.