JPH0487A - Clamp device - Google Patents

Abstract

PURPOSE:To equalize the distribution of circumferential weight to have a proper fastening force in a clamp device for fixing a rubber boot unit and the like to a cylindrical body by providing a metal band body with an engaging hole, protrusion, hooking part and terminal retainer. CONSTITUTION:Under a condition that clamp device 10 is wound around the fitting part between a boot unit 70 and a pipe 71 and arm fore ends 62a, 63a of a tool 60 are engaged with hook parts 40, 45 for the tool 60, they 40, 45 are pulled to close to each other. At this time a first end 13 is made to enter an opening part 51 of a terminal retainer 50. At the time point when a band body 11 is fastened by a specified amount by the tool 60, an engaging protrusion 35 engages with an engaging hole 30. Namely, a front wall 36 of the engaging protrusion 35 engages with an edge part 31 of the engaging hole. As a result, an outside overlapping part 22 stick to an inner side overlapping part 21. Consequently, the protrusion 35 fitted in the hole is stopped to move completely so that there is no fear of disengagement of the protrusion 35 from the hole 30.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a clamping tool used for fixing, for example, a rubber hose or a rubber boot to a cylindrical body.

[Prior Art] A conventional clamp tool 100 shown in FIG. 11 has a locking hole 1 in a metal band body 101 wound in a ring shape.
02, a hook 103 that engages with this locking hole 102,
Equipped with ears 104 for tightening. This clamp tool 1
00, with the hook 103 engaged with the locking hole 102, the ear part 104 is caulked with a tool as shown by the two-dot chain line, and the diameter R of the band body 101 is narrowed to tighten the band body 101. It is tightened to the attached surface.

On the other hand, another conventional clamp tool 1 shown in FIG.
10, a band body 111 is provided with a locking hole 112, a hook 113 that engages with the locking hole 112, and a pair of tool hooking portions 114 and 115. This clamp tool 1
1 (in the case of l, tool L2f), the tool hook is part 11
4, 115 in the direction of the arrow shown in the figure, the outer overlapping portion 123 of the band body 111 slides on the hook 113, and when the band body 111 is tightened by a predetermined amount, the hook 113 is locked in a predetermined position. Hole 112
It's starting to get into the.

Therefore, the front wall 113a of the hook 113
13 is formed in a shape that protrudes diagonally forward (an overhanging shape) so that it does not come off from the locking hole 112.

[Problems to be Solved by the Invention] In the clamp tool 1oo shown in FIG. 11 described above, the ears 104 largely protrude outside the band body 101, so there is a possibility that the ears 104 may interfere with surrounding members. . Further, when the ear portion 104 is crimped, if the crimping force is removed, springback occurs in the direction in which the ear portion 104 expands, so there is a problem that it is difficult to obtain an optimum tightening force. Moreover, since the weight distribution of this clamp tool 100 along the circumferential direction is largely biased, there is a problem in that the clamping force is biased when the clamp tool 100 is rotated at high speed.

On the other hand, when the clamp tool 110 in FIG. 12 tightens the band body 111 with the tool 120, the hook 113
At the moment when the band body 111 enters the locking hole 112, the band body 111 returns to a direction in which it becomes slightly loosened by the overhang of the hook 113.

For this reason, it is disadvantageous in exerting a strong tightening force.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a lamp tool that does not require large protrusions such as conventional ears and that can maintain an optimum clamping force.

[Means for Solving the Problems] The clamping tool of the present invention developed to achieve the above object has a first end and a second end, and is wound so that the second end of the brace is located inside. a band-shaped metal band body having an inner overlapping portion and an outer overlapping portion; a locking hole formed in the outer overlapping portion; and a locking hole formed in the inner overlapping portion and capable of engaging with an edge of the locking hole. a locking protrusion having a front wall; a first tool hook provided near the first end of the band body; a first tool hook provided on the band body; The second tool hook is provided at a position such that the first end can be inserted when the locking protrusion is fitted into the locking hole, and the second tool hook is held in the inserted state. The device is equipped with a terminal holding section.

Note that the terminal holding section may be used as a second tool hooking section.

[Operation] When attaching the clamping tool of the present invention to a surface to be tightened, after wrapping the band body around the surface to be tightened, the first
The tool hook portion and the second tool hook portion are drawn toward each other, and the locking protrusion is fitted into the locking hole. At this time, the first end of the band body enters the terminal holding part and is held, so the overlapping state of the outer overlapping part and the inner overlapping part is maintained, and the locking protrusion is inserted into the locking hole. It is prevented from coming off.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 9. The clamp tool 1° has a band-shaped metal band body 11.

As shown in FIG. 6, this band body 11 has a main body portion 12 extending over a length Ll in the unfolded state;
Length L2 located on one end side in the longitudinal direction of this main body portion 12
a first end 13 of the length, and a second end 1 of the length 13 located on the other end side.
It has 4. The band body 11 is made of stainless steel, for example, and has appropriate elasticity and flexibility to bend in the thickness direction.

The first end 13 is formed to be narrower than the plate width B of the main body portion 12, and has a tapered shape such that the thickness on the tip side is reduced.

The second end 14 is also formed to be narrower than the plate width B of the main body portion 12, and has a tapered shape such that the thickness on the tip side is reduced. A hole 15 is punched in the center of the second end 14.
is formed. By providing this hole 15, it becomes easy to shape the thickness of the second end 14 into the above-mentioned tapered shape by press working or the like.

The band body 11 is rolled up and wound around the tightened surface 20 so that the second end 14 is located inside. Therefore, it is preferable that the band body 11 is previously formed into a C-shape so that it can be easily wrapped around the surface 20 to be tightened. The band body 11 wound around the tightened surface 20 has an inner overlapping portion 21, an outer overlapping portion 22, and an intermediate portion 23 continuous to these image portions 21,22.

A locking hole 30 is provided in the outer overlapping portion 22.

As shown in FIG. 4, the locking hole 30 includes a linear front edge 31 extending in the width direction of the band body 11 and a rear edge 32 having a roughly semicircular shape. The number of locking holes 30 may be appropriately determined as necessary.

A locking protrusion 35 is provided on the inner overlapping portion 21. The locking protrusion 35 is squeezed out by pressing or the like so as to bulge out toward the outer surface of the inner overlapping portion 21, and has a shape that allows it to fit into the locking hole 3o. The locking protrusion 35 includes a front wall 36 that can be engaged with the edge 31 of the locking hole 30, and an arch-shaped bulging portion 37 that extends behind the front wall 36. As shown in FIG. 5, the front wall 36 stands up from the surface of the band body 11 in a substantially perpendicular direction. The protruding height of the locking protrusion 35 is greater than the thickness of the band body 11.

As shown in FIGS. 2 and 3, the band body 1
A first tool hook portion 40 is provided on the outer overlapping portion 22 of the first tool. This tool hook portion 40 is connected to the first end 13
It is located near. The tool hook portion 40 includes a first upright wall 41 facing toward the locking hole 30 and a first opening 42 .

A second tool hook portion 45 is provided in the intermediate portion 23 of the band body 11. The tool hook portion 45 includes a second upright wall 46 and a second opening 47.

As shown in FIG. 8, the distance W from the first rising wall 41 to the second rising wall 46 is determined by the tool 60 described later.
The dimensions are such that the arm tips 62a and 63a can reach them. The tool hook portions 40 and 45 are squeezed into the above shape by press working or the like.

A terminal holding portion 50 is provided near the second tool hook portion 45 . The terminal holding part 50 is located between the second tool hook part 45 and the locking protrusion 35. As shown in FIGS. 2 and 3, the terminal holding section 50 is provided with an opening 51 and a terminal holding wall 52. Opening 51
has an opening width into which the first end 13 can be inserted. The opening height Hl of the opening 51, that is, the distance from the surface of the band body 11 to the terminal holding wall 52, is the same as that of the band body 11.
It is equivalent to the plate thickness of Therefore, the first end 13 inserted into the opening 51 is restrained by the terminal holding part 50 in the board thickness direction and the board width direction.

As shown in FIG. 1, the terminal holding portion 50 is attached to the first
The end 13 is positioned such that it can be inserted into the opening 51. The terminal holding portion 5o is also squeezed out using a press or the like.

As shown in FIG. 8 or 9, the tool 60 has a pair of arms 62, 63 that can be opened and closed about a shaft 61, similar to a well-known nipper.

The tips 62a, 63a of the arms are provided with small protrusions 65, 66 on opposite sides.

These small protrusions 65 and 66 are connected to the tool hook portion 40.
The shape and size are such that it can fit into the openings 42 and 47 of 45.

Next, the operation of the clamp tool 1o having the above structure will be explained.

The clamp tool 1o of this embodiment is used, for example, to fix the connection between the boot 70 and the vibrator 71. The boots 70 are made of rubber, for example, and the vibrator 71 is made of metal. However, the boots 7o or the vibrator 71 may be made of synthetic resin.

As shown in FIG. 8, the clamp tool 1o is wrapped around the fitting part between the boot 7o and the vibrator 71, and the arm tips 62a and 63a of the tool 60 are locked to the tool hook parts 40 and 45. With this tool 60, the tool hook part 40
．． 45 are drawn toward each other (in the direction of the arrow shown). At this time, the first end 13 is connected to the opening 51 of the terminal holding part 50.
Let it enter.

When the band body 11 is tightened by a predetermined amount by the tool 60, the locking protrusion 35 fits into the locking hole 30 as shown in FIG. That is, as shown in FIGS. 4 and 5, the front wall 36 of the locking projection 35 engages with the edge 31 of the locking hole 30.

Further, as shown in FIGS. 2 and 3, the first end 1
3 enters the terminal holding portion 50, the first end 1
3 is restrained. Therefore, the outer overlapping portion 22 does not separate from the inner overlapping portion 21. Therefore, the locking hole 30
The locking protrusion 35 that is fitted into the locking hole 30 is completely stopped from moving, and there is no possibility that the locking protrusion 35 will come off the locking hole 30.

Moreover, since the front wall 36 of the locking protrusion 35 in this embodiment rises vertically from the surface of the band body 1 as shown in FIG.
When the band body 11 is fitted into the locking hole 30, the behavior of the band body 11 returning to the loosening direction does not occur. Therefore, optimum tightening force is maintained.

In addition, as shown in FIG. 10, the terminal holding part 50 may be formed at a position away from the tool hooking part 45. Further, the terminal holding section 50 may be a separate component configured separately from the band body 11 and may be fixed to the band body 1 by an appropriate fixing means. In addition, the terminal holding section 5
0 and the tool hook portion 45 may be integral with each other.

[Effects of the Invention] According to the present invention, when the locking protrusion is engaged with the locking hole, the outer overlapping portion of the band body is restrained from separating from the inner overlapping portion, so that the locking protrusion is prevented from separating from the inner overlapping portion. There is no risk of it coming off the locking hole.

Moreover, there is no need for a large protruding part from the band body like the conventional ear part, and the weight distribution in the circumferential direction is almost uniform. In addition, since springback does not occur after tightening work, optimum tightening force can be obtained. Further, the first end does not curl up.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a tightened state of a clamp tool according to an embodiment of the present invention, FIG. 2 is an enlarged plan view showing the vicinity of the end holding part of the clamp tool shown in FIG. 1, and FIG. The figure is a sectional view taken along the line ■-■ in Figure 2, Figure 4 is a plan view showing the locking protrusion and locking hole of the clamp tool shown in Figure 1, and Figure 5 is a cross-sectional view in Figure 4. 6 is a cross-sectional view along the v-v line of
FIG. 7 is a plan view showing the clamping device shown in FIG.
The figure is a side view showing the clamping tool shown in Fig. 1 in an expanded state, Fig. 8 is a sectional view showing the state in the middle of tightening the clamping tool shown in Fig. 1, and Fig. 9 is a side view showing the clamping tool shown in Fig. 1 being tightened. FIG. 10 is a plan view of the vicinity of the terminal holding part showing another embodiment of the present invention, FIG. 11 is a front view showing an example of a conventional clamping tool, and FIG. 12 is a plan view of another embodiment of the present invention. FIG. 3 is a front view of a conventional clamp tool. 10... Clamp tool, 11... Band body, 1
3... First end, 14... Second end, 20... Surface to be tightened, 21... Inner overlapping portion, 22... Outer overlapping portion, 23... Intermediate portion, 30...・Latching hole, 31・
... Edge, 35 ... Locking protrusion, 36 ... Front wall, 4
0... The first tool hook is the part, 45... The second tool hook is the part, 50... The terminal holding part, 60... The tool. Applicant's agent Patent attorney Takehiko Suzue Figure 10 Figure 11 Figure 12

Claims (2)

[Claims] (1) A clamping tool that is wound around and attached to a surface to be tightened, which has a first end and a second end, and has an inner overlapping portion when it is wound such that the second end is located inside. a band-shaped metal band body having an outer overlapping portion; a locking hole formed in the outer overlapping portion; and a front wall formed in the inner overlapping portion and capable of engaging with an edge of the locking hole. a locking protrusion, a first tool hook part provided near the first end of the band body, and a second tool hook part provided on the band body and paired with the first tool hook part. a tool hook portion; and a terminal holding portion that is provided at a position such that the first end can be inserted when the locking protrusion is fitted into the locking hole, and that holds the first end in the inserted state. A clamp tool comprising: (2) The clamp tool according to claim 1, wherein the front wall of the locking protrusion stands up in a direction substantially perpendicular to the surface of the band body.