JPH0488A - Clamp device - Google Patents

Abstract

PURPOSE:To have a proper fastening force in a clamp device for fixing a rubber boot unit to a cylindrical body by providing a metal band body with a inserted part for temporary fixing part, a terminal retainer part, an engaging hole, an engaging protrusion and a hook part for a tool. CONSTITUTION:A clamp device 10 is wound around the fitting part between a boot unit 70 and a pipe 71, and a first end 13 is inserted into an opening 56 of an inserted part 55 for temporary fixing. Then engaging protrusions 35, 35 are fitted to first and second engaging holes 30a, 30b accordingly. Arm fore ends 62a, 63a of a tool 60 are engaged with hook parts 40, 45 for the tool 60, and they 40, 45 are pulled to close to each other. A first end 13 is guided by the inserted part 55 and advanced towards an opening 51 of a terminal retainer 50. By fastening a band body 11 by a specified amount by means of the tool, the protrusions fit into the second and third engaging holes 30b, 30c. Then a front face 36 of the protrusion engages with an edge part 31 of the hole. Also, the tip end of the first end enters in the terminal retainer and fixed thereby.

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. 9 has a locking hole 10 in a metal band body 101 wound in a ring shape.
2, a hook 103 that engages with this locking hole 102, and an ear portion 104 for tightening. This clamp tool 10
0, 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.
The band body 101 is tightened to the surface of the material to be tightened.

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
In the case of 10, the tool 9 hangs by the tool 120 is part 114,
115 in the direction of the arrow shown in the figure, the band body 1
11 slides on the hook 113, and when the band body 111 is tightened by a predetermined amount, the hook 113 enters the locking hole 112 at a predetermined position.

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] The above-described clamping tool 100 shown in FIG. 9 has the following problems:
There is a possibility that the ear portion 104 may interfere with surrounding members. Further, when the ear portion 104 is caulked, if the caulking 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. Furthermore, since the weight distribution of the clamping tool 100 along the circumferential direction is largely biased, there is a problem in that the clamping force is biased when the clamping tool 100 is rotated at high speed.

On the other hand, when the clamp tool 110 of FIG. 10 tightens the band body 111 with the tool 120, the hook 113
At the moment when the hook 113 enters the locking hole 112 at a predetermined position, the band body 1
11 returns to the direction of loosening, albeit slightly. For this reason, it is disadvantageous in exerting a strong tightening force.

Further, in any of the above conventional examples, the clamp tool 100 (1
10) to the surface to be tightened, use the hook 103 (1
13) must be hooked into the locking hole 102 (112), the elasticity of the band body 101 (111) will cause the outer overlapping portion to separate from the inner overlapping portion, making it difficult to temporarily secure the band. was there.

Therefore, an object of the present invention is to provide a lamp tool that does not require large protrusions like conventional ears, can maintain an optimal tightening force, and can be easily temporarily fastened. .

C Means for Solving Problem] The clamp 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 is located inside. A band-shaped metal band body having an inner overlapping portion and an outer overlapping portion in a state, 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; the tool hook part of j@2 forming a part; A temporary fixing insertion part is provided between the terminal holding part and the locking protrusion and having an opening through which the longitudinally intermediate part of the first end can be inserted.

[Function] When attaching the clamping tool of the present invention to a surface to be tightened, the band body is wrapped around the surface to be tightened, and the first end is inserted into the insertion portion for temporary fixing. By doing so, the band body can be temporarily fixed to the surface to be tightened, and even if the band body is released from the band body, it will not fall off from the surface to be tightened.

The tool draws the first tool hook portion and the second tool hook portion toward each other, causing the locking protrusion to fit into the locking hole at a predetermined position. At this time, the temporary fixing insertion part also functions as a guide for guiding the first end to move straight forward toward the terminal holding part.

Since the first end of the band body enters the terminal holding part and is held, the overlapping state of the outer overlapping part and the inner overlapping part is maintained, and the locking protrusion does not come off from the locking hole. is prevented.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. 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 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 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 of the tip portion 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 form 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.

Locking holes 30a and 30b are provided in the outer overlapping portion 22.

30c is provided. As partially shown in FIG. 4, the locking holes 30a to 30c include 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. ing.

The number of locking holes 30a to 30c may be appropriately determined as necessary, but preferably two or more.

A locking protrusion 35 is provided on the inner overlapping portion 21. This 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 can fit into the locking holes 30a to 30c. The locking protrusion 35 includes a front wall 36 that can be engaged with the edges 31 of the locking holes 30a to 30c, and an arch-shaped bulging portion 37 continuous to the rear side of the front wall 36.

As shown in FIG. 5, the front wall 36 is connected to the band body 1.
It rises almost perpendicularly from the surface of 1. The protruding height of the locking protrusion 35 is greater than the thickness of the band body 11. The number of locking protrusions 35 is smaller than the number of locking holes 30a to 30c.

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. This tool hook portion 40 includes a first rising wall 41 facing the direction of the locking hole 30a;
A first opening 42 is provided.

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 between the tool hook portions 40 and 45 is equal to
The dimensions are such that 3a can be reached. The tool hook portion 4.degree. 45 is squeezed into the above shape by press working or the like.

A terminal holding portion 50 is provided integrally with the second tool hook portion 45 . The terminal holding portion 5o is located on the locking protrusion 35 side of the second tool hook portion 45. As shown in FIGS. 2 and 3, an opening 51 is provided in the terminal holding portion 50.
A terminal holding wall 52 is provided. The opening 51 is
It has a size that allows the first end 13 to be inserted therein. Opening 5
The opening height Hl of 1, that is, the distance from the surface of the band body 11 to the end presser 52, is equivalent to the thickness of the band body 11. Therefore, insert it into the opening 51.

The inserted first end 13 is restrained in the plate thickness direction and the plate width direction by the terminal holding portion 5o. As shown in FIG. 1, this terminal holding portion 50 allows the tip portion of the first end 13 to be inserted in a state in which the locking protrusions 35 and 35 are fitted into the locking holes 30b and 30c at predetermined positions. It is located in such a position.

Moreover, a temporary fixing insertion part 55 is provided between the terminal holding part 50 and the locking protrusion 35. This insertion part 5 for temporary fixing
5 is an opening 56 that passes through the band body 11 in the longitudinal direction.
have. The opening 56 is configured so that the longitudinally intermediate portion of the first end 13 can be inserted therethrough. That is, the locking protrusions 35° 35 are inserted into the locking holes 30b, 30 at predetermined positions.
The structure is such that the first end 13 can be inserted into the temporary fixing insertion portion 55 in a temporarily fixed state before being fitted into the first end 13.

The temporary fixing insertion portion 55 is also formed by press working or the like.

As shown in FIG. 8, the tool 60 has a pair of arms 62.6 that can be opened and closed about a shaft 61, similar to a well-known nipper.
It has 3. At the tips of the arms 62a and 63a,
Small protrusions 65, 66 are provided on opposite sides. These small protrusions 65°66 are located at the tool hook portion 4.
It is shaped and sized to fit exactly into the 0.45 mm opening 42.47.

Next, the operation of the clamp tool 10 having the above configuration will be explained.

The clamp tool 10 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 70 or the vibrator 71 may be made of synthetic resin.

As shown in FIG. 8, the clamp tool 10 is wrapped around the fitting part between the boot 70 and the vibrator 71, and the first end 13 is inserted into the opening 56 of the temporary fixing insertion part 55. At this time, the locking protrusions 35.35 are connected to the first locking hole 30a and the second locking hole 30.
Fits into b.

With the arm end portions 62a and 63a of the tool 60 being engaged with the tool hook portions 40.45, the tool 60 pulls the tool hook portions 40.45 toward each other. At this time, the first end 13 advances straight toward the opening 51 of the terminal holding part 50 while being guided by the temporary fixing insertion part 55.

When the band body 11 is tightened by a predetermined amount by the tool 60, the locking projections 35 and 35 are tightened as shown in FIG.
fits into the second locking hole 30b and the third locking hole 30C. Then, as shown in FIGS. 4 and 5, the front wall 36 of the locking protrusion 35 engages with the edge 31 of the locking hole 30. As shown in FIGS. Further, as shown in FIGS. 2 and 3, the first end 13 is restrained by the distal end portion of the first end 13 entering the terminal holding portion 50. Therefore, the outer overlapping portion 22 does not separate from the inner overlapping portion 21. For this reason, the locking protrusions 35. which are fitted into the locking holes 30b, 30c.
35 is in a completely locked state, and there is no possibility that the locking protrusions 35.35 will come off from the locking holes 30b, 30c.

Moreover, since the front wall 36 of the locking protrusion 35 of this embodiment stands up vertically from the surface of the band body 11 as shown in FIG.
5.35 is the locking hole 30b.

30c, the behavior of the band body 11 returning to the loosening direction does not occur.

Therefore, optimum tightening force is maintained.

Note that the terminal holding part 50 and the temporary fixing insertion part 55 may be separate parts configured separately from the band body 11 and fixed to the band body 11 by appropriate fixing means. Further, the terminal holding portion 5o and the tool hooking portion 45 may be provided separately from 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. Moreover, by providing the insertion portion for temporary fixing, the band body can be easily temporarily fixed to the surface to be tightened.

[Brief explanation of the drawing]

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 cross-sectional view of the clamp tool shown in Figure 1 in an unfolded state, Figure 8 is a cross-sectional view showing the clamp tool shown in Figure 1 in the middle of tightening, and Figure 9 is a conventional clamp tool. FIG. 10 is a front view of another conventional clamp tool. 10... Clamp tool, 11... Band body, 1
3... First end, 14... Second end, 20... Surface to be tightened, 21... Inner mold portion, 22... Outer mold portion, 23-... Intermediate portion, 30a, 30b
, 30 c-locking hole, 31...edge, 35...locking protrusion, 36...front wall, 40...first tool hook part, 45...second tool Hook is part, 50... Terminal holding part, 55... Insertion part for temporary fixing, 56... Opening,
60...Tools. Applicant's Representative Patent Attorney Takehiko Suzue Figure 10

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; a terminal holding part provided at a position such that the first end can be inserted when the locking protrusion is fitted into a locking hole at a predetermined position; and the terminal holding part and the locking part. A clamping tool comprising: a temporary fixing insertion part provided between the fixing protrusion and having an opening through which the longitudinal intermediate part of the first end can be inserted. (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.