JPS6219648Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a tape clamp device for fastening a tape end portion to a tape reel.

A clamp locking hole that is recessed radially inward is provided in a part of the outer circumferential surface of the reel hub around which the tape is wound.After inserting the tape into the hole, the clamp is pushed in and the hole is inserted between the clamp and the wall of the locking hole. Various types of clamp devices for clamping tape have been developed.

However, in all of these methods, the work of installing the clamp was to position the clamp radially outward of the locking hole and then push it "straight" toward the center of the hub. The work of pushing the product ``straight'' was extremely troublesome and required time and effort, resulting in a drawback that increased the product cost.

To explain this point in more detail, FIG. 1 shows an example of a typical conventional clamp device.

The clamp 1 has a main surface portion 3 having an outer circumferential surface curvature that is the same as that of the reel hub 2, and a pair of elastic legs 4, 4 generally extend from the back surface at a distance in the circumferential direction. The outer surface is provided with an engaging portion 7 that engages with an engaging surface 6 provided at a position corresponding to a locking hole 5 formed in the hub.

The tape T is held using the clamp 1 as follows.

A portion of the tape T is inserted into the locking hole 5, and the clamp 1 is placed radially outward of the locking hole with both legs 4, 4 facing the locking hole (the state shown in the figure). Push it straight into the locking hole 5 toward the center of the hub as shown by arrow F. Then,
In principle, both legs 4, 4 should bend evenly as they pass through the narrow gap, and eventually both locking parts 7, 7 should engage with engagement surfaces 6, 6.

However, in reality, things do not work as described above, and the clamp 1 tends to be tilted during the pushing operation, and when one leg 4 goes deeper, the other leg floats up, and when you try to hold it down, the clamp 1 tends to tilt at an angle. This requires a lot of nerve-wracking work, as those who have been deeply engrossed in it may start to emerge. This is especially true when both legs are connected by a bridge portion 8 as shown in the figure in order to provide both rigidity.

This proposal was made in view of this point, and as described above, except for the conventional work condition of applying force evenly to the surface of the clamp 1 and pushing it straight toward the center of the hub, it is not necessary to be an expert. The aim is to provide a clamping device that can be easily installed.

Therefore, in the present invention, the clamp is attached by rotating around one point as a fulcrum.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

However, since the basic components of the clamp device of the present invention may be the same as those shown in FIG. 1, the same reference numerals as in FIG. 1 are given to them in FIGS.

First, the first embodiment shown in the second and third figures will be explained. This clamp device also consists of a clamp 1 which is a plastic molded product, and a locking hole 5 provided in a hub 2 around which a tape is wound.

The clamp 1 has a main surface portion 3 having an outer surface having the same curvature as the outer peripheral surface of the hub 2, and a pair of elastic legs 4, 4 protrude from the back surface of the main surface portion 3. Main surface portions 3 further protrude from the base of the legs on both sides, and these protruding portions form flange portions 9, 9.

Accordingly, flange receiving step portions 10, 10 are also formed along the opening edge of the locking hole 5 provided in a part of the outer peripheral surface of the hub 2 in the radial direction. Clamp engagement surfaces 6, 6 are formed below the portions forming the bottom surfaces of the stepped portions 10, 10.

On the other hand, when the clamp 1 has been pushed in and the outer surface of the main surface 3 becomes a part of the outer surface of the hub 2 (FIG. 3), in order to maintain this state, the engagement surface 6 Engaging portions 7, 7 that engage with the legs 4, 4 are provided on the outer surfaces of both legs 4, 4.

Further, the tips of both legs 7, 7 are desirably connected at a bridge portion 8 in order to increase appropriate rigidity and tape holding force, which will be described later. Each part is also provided with ribs that bulge inward to provide a certain degree of rigidity, but this is a design matter and will not be explained here.

In addition, such a clamp 1 has approximately the same height as the height of the hub 2 (the direction in which it passes through the page from front to back),
The same applies to the locking hole 5. However, this is natural from the perspective of clamping a wide tape T, and is common knowledge for this type of clamping device, so it is not shown.

However, first we will explain the desired clamp installation work that we are aiming for in this project.The characteristic feature is that, as in the past, the clamp 1 should be directed toward the locking hole 5, aimed at the center of the hub, and straight. Rather than pushing in, the engaging portion 7 of one of the elastic legs (on the left side in FIG. 2) is first hooked onto the complementary engaging surface 6 of the locking hole 5. This allows clamp 1
As shown in FIG. 2, when viewed from above, the other leg is in an overall oblique position.

Therefore, as shown by the imaginary circle O, using the abutting part of the engaging portion 7 and the engaging surface 6 that have been hooked together as a fulcrum, move the floating side of the clamp main surface 3 to the arrow R.
When pressed as shown in , the clamp 1 rotates around the fulcrum, and if there is the other leg 4 and the bridge 8, both legs bend through this, and the engaging part 7 , and as shown in the third figure, this engaging portion 7 is also locked to the corresponding engaging surface 6. Of course, a tape T is placed between the clamp 1 and the wall of the locking hole 5 in advance.
is inserted, and in the state shown in the third figure, it is held by being pinched between each part of the clamp and each part of the wall surface of the locking hole corresponding thereto.

By the way, in order to make such work possible, initially, when the clamp 1 is placed in an oblique position and one of the engaging parts 7 is hooked on the engaging surface 6, the flanges 9 on both sides of the clamp main surface part 3, 9 must not collide with the bottom surface of the stepped surface portions 10, 10 on the side of the locking hole that receives it. Conversely, if the receiving step surfaces 10, 10 are brought into close contact with the flanges 9, 9 when the clamp locking is completed, the clamp cannot be tilted during the initial installation work.

Therefore, in this embodiment, in order to be able to adopt the above-mentioned desirable work procedure, and more specifically, to make the clamp diagonal so that one of the engaging portions 7 can be hooked on the corresponding engaging surface 6, flange 9,
Relief surfaces 11, 11 are formed by slanting the corners of the lower surface of 9.

Of course, if the engaging portion 7 to be hooked is determined initially, it is sufficient to form the relief surface 11 only on the corresponding flange 9, but generally, as in the illustrated embodiment, the relief surface 11 is formed on the left and right flange 9. If you make it symmetrical, you can hook it from the opposite direction to the one shown in the diagram, which gives you flexibility and is convenient.

Further, the flank 11 does not need to be provided on the flange 9, for example, when the flange 9 has a conventional uniform thickness as in the second embodiment shown in the fourth and fifth figures, Even if the flank face 11 is formed slightly diagonally downward toward the flange receiving step face 10, the fifth
As shown in the figure, during the initial operation, the clamp 1 is held obliquely and one of the engaging portions 7 is hooked onto the corresponding engaging surface 6 to serve as a fulcrum when rotating and pushing.

In short, it is sufficient to form a relief surface on at least one of the two surfaces of the flange and the stepped surface that receives the flange, which face each other via the tape T. However, if a relief surface is formed on the lower surface of the flange as in the first embodiment, it is possible to prevent local stress from being applied to the tape due to the acute angle when force is applied to the tape T in the pulling direction. convenient.
Note that, as in this embodiment, if the tips of the legs 4, 4 are bent so as to face each other, and these are connected by the short bridge section 8, the torque transmission force between the legs becomes stronger. In Fig. 3, when a pull-out force F' is applied to the right end of the tape T, the entire clamp lifts up diagonally from the right end, causing the engaging portion 7 at the opposite end to The contact force between the and the engaging surface 6 increases, and the force that tightens the tape sandwiched between them increases, resulting in a force in the pulling direction.
In addition to increasing the force resisting F′, the pull-out direction force F′ produces a force component F′ in the tape portion along the opposite (left) leg, and this force causes the leg 4 that is Because of the force pushing toward the leg side, the right leg 4 is pushed further to the right via the bridge portion 8, and the contact force between the engagement portion 7 of the right leg of the lever and the engagement surface 6 also increases. In addition, unlike conventional products, in this case, only one elastic leg engages with the engaging portion by forceful pushing, so the rigidity of this leg itself is increased and the tape holding force is increased. Even if the number is increased, the workability will not deteriorate.

In any case, according to the present invention, the installation work of the clamp 1 is a rotating push-in operation using one point as a fulcrum, and the part that becomes the fulcrum is the part that hooks onto the engaging surface of one of the engaging parts, making it extremely stable. As a result, anyone can attach the clamp in one operation without having to be as nervous as in the past, which can have great effects in improving work efficiency and reducing unit product costs.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of a typical conventional tape clamp device, Figure 2 is a cross-sectional view of the first embodiment of the present invention at the time of clamp installation, and Figure 3 is a cross-sectional view similar to Figure 2 after installation is completed. 4 is a horizontal half sectional view of the second embodiment after completion of clamp installation, and FIG. 5 is a horizontal half sectional view illustrating the diagonal posture of the second embodiment when the clamp is initially installed. In the figure, 1 is the clamp, 2 is the hub of the reel, 3 is the main surface, 4 is the elastic leg, 5 is the clamp locking hole, 6 is the engagement surface, 7 is the engagement part, 9 is the flange, and 10 is the flange receiver. 11 is a relief surface.

Claims (1)

[Claims for Utility Model Registration] A clamp is locked in a clamp locking hole provided on the outer peripheral surface of a hub around which a tape is wound, a tape is held between the clamp and the wall surface of the locking hole, and the tape is held between the clamp and the wall surface of the locking hole. The clamp includes a main surface portion having an outer surface having the same curvature as the outer peripheral surface of the hub, a pair of elastic legs extending from positions spaced apart from each other in the circumferential direction on the back surface of the main surface portion, and an outer surface of the elastic legs. and an engaging portion that is provided on the wall of the locking hole and that locks onto an engaging surface formed on the wall of the locking hole, the main surface of the clamp extending from the base of the elastic leg. Furthermore, it has a flange projecting outward in the circumferential direction, and the opening edge of the clamp locking hole is provided with a flange receiving stepped surface for accommodating the flange, and the lower corner of the flange is sloped. A tape clamp device characterized in that the bottom of the flange receiving stepped surface that receives the flange is dug diagonally to form a relief surface.