JP3129580B2 - Boot clamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal band-shaped clamp for fixing a covering or the like to the outer periphery of a pipe, and in particular, restricts a radius of rotation such as a movable boot put on a constant velocity joint of an automobile. The present invention relates to a clamp suitable for fastening a certain portion, or fastening a hose at a portion requiring a binding force capable of holding lubricating oil.

[0002]

2. Description of the Related Art As shown in FIG. 6A, a fastening band made of steel or stainless steel is bent as a fastening clamp for a boot for a constant velocity joint so as to be similar to the cross-sectional profile of the boot B. A clamp C including an annular portion K and a U-shaped stopper S is used. In the clamp C, both ends of the band are overlapped and fixed on the inner surfaces, and a metal lever R is fixed to the overlapping portion. As shown in FIG. 6B, the clamp C is used with the lever R depressed while the diameter of the annular portion K is reduced, and the distal end thereof is fixed to the annular portion K with the stopper S.

[0003]

However, the conventional clamp C has the following disadvantages. B) It is necessary to depress the lever R against the elasticity of the boot B and the restoring force of the annular portion K, and to caulk the stopper S while holding the lever R at that position, which takes a lot of time for fastening. B) The inner surface of the base D of the overlapping portion at both ends of the band is less likely to press against the outer peripheral surface of the boot B, and the sealing force at this portion is weak. C) The clamping process of the clamp is complicated, and it is difficult to automate the assembling by a robot or the like. An object of the present invention is to provide a clamp that can perform a fastening operation with one touch, has good sealing properties, and can easily automate a fastening process.

[0004]

According to the present invention, there is provided a clamp comprising:
A band made of a band-shaped leaf spring having a substantially cylindrical surface and the other end overlapping the outer periphery of one end, and disposed along the outer surfaces of both ends of the band, and one end (right end in the drawing) of the band; A band-shaped sheet metal connecting band, which is connected to a position separated by a required distance from one end, and provided at the other end (left end in the drawing) a band holding portion into which the other end of the band is slidably inserted; A tip of a connecting band, a hook portion of a pair of pinching tools provided at a position separated by a required distance from the other end of the band, and a wavy bent portion formed in the connecting band and inclined to the other end side And an engaging means formed at the other end of the band and engaging with the lower surface of the bent portion.

[0005]

The clamp of the present invention has the following effects. a) A uniform binding force can be applied to the outer periphery of the object to be fastened, and the sealing property is excellent. b) Since the engagement operation can be performed by the pinching operation of the pinching tool, the fastening operation can be easily performed regardless of the strength of the clamping force, and the automation of the fastening process by a robot or the like is easy.

[0006]

1 to 5 show a clamp 1 according to a first embodiment of the present invention. A clamp 1 according to the present invention has a substantially cylindrical surface, a band 2 made of a band-shaped plate spring having an end portion 21 overlapping the outer periphery of an end portion 21, and a band-shaped sheet metal connection band for engaging both end portions of the band 2. And 3. In this embodiment, the other end portion 22 constituting the outer portion of the overlapping portion 20 at both ends of the band 2 has a larger radius of curvature than the other portion of the band 2 via the step portion 23 by the thickness of the plate. I have. Connecting band 3
Has a dimension that exceeds the overlapping portion 20 of the band 2 on both sides in the longitudinal direction, and is disposed along the outer surface of the band 2. A left end (the other end) 31 of the connecting band 3 in the figure is connected to a position at a required distance from one end 2 </ b> A of the band 2 and beyond the overlapping portion 20.

In this embodiment, the connection between the band 2 and the left end 31 of the connecting band is made as follows. A bulging portion 25 is formed by bulging the connecting portion of the band 2 outward by the thickness of the connecting band 3. The left end of the material of the connecting band 3 is formed in a T-shape, and both sides are bent to form a flat rectangular tubular portion 32, which is fitted to the bulging portion 25. With this,
The outwardly raised piece 26 provided on the bulging portion 25 is inserted through a slit 33 provided on the outer wall of the flat rectangular tubular portion 32, and the protruding portion of the cut and raised piece 26 is inserted into the flat rectangular tubular portion 32. Bend to the outside surface. The connecting structure between the band 2 and the left end portion 31 of the connecting band of this embodiment has the advantages that the connecting strength can be increased and the mechanical strength of the band 2 at the connecting portion is less reduced.

At the right end (one end) 34 of the connecting band 3 in the figure, the other end 22 of the band 2 is located at a position beyond the overlapping portion 20 and within the other end 22 having the large diameter. A slidable band holder 35 is provided. The band holding portion 35 is a connecting band 3 pressed in a cross shape.
The material has a structure in which both sides of the right end of the material are bent inwardly into a U-shape (see FIG. 2) to hold the band 2 and further bent oppositely to form a tube.

At a position (a root of the step 23 in this embodiment) at a distance from the tip of the right end 34 of the connecting band 3 and the other end 2B of the band 2 (the root of the step 23 in this embodiment), a hook 4 for a pair of pinching tools And 5 are provided. The hook portion 4 is formed by bending the tip of the right end portion of the material of the connection band 3 pressed in the cross shape upward. Cut part 5
Punches a slit 27 in the wall surface of the band 2 and the other end 2B of the slit 27 of the band 2 including the edge of the slit 27.
It is formed by bulging the glue portion into an inclined cylindrical surface.

In the connecting band 3, corrugated bent portions 36, 36 inclined to the right end side are arranged in the middle portion, and the right side wall 61 on the lower surface of each bent portion 36 is formed in a radial wall or a radial direction. The wall is slightly inclined to the right in the figure. The bent portion 36 may be a rectangular wave type or a wave type having a structure that can be engaged with an elastic engaging element described later. At the tip of the other end 22 of the band 2, a U-shaped cut is made in the wall surface of the band 2, and the engaging element 6 formed by raising outward is formed.
2 are provided. The engagement element 62 is shown in FIG.
As shown in the figure, the tip of the other end 22 of the band 2 is
It may be formed by bending about 20 to 170 degrees. The right side wall 61 and the engaging element 62 constitute an engaging means 6 having a ratchet structure.

The clamp 1 is, as shown in FIG.
After loosely fitting to the fastening position of the boot B, temporarily fix it,
Finally, the boot B is tightened so that the hooks 4 and 5 are sandwiched by the pinching tool P having the shape of a finger. As a result, as shown in (b), the other end 22 of the band 2 penetrates between the one end 21 and the connecting band 3 while tightening the boot B. As shown in (c), when the engaging element 62 is engaged with the predetermined right side wall 61, the tightening by the tool P is released. Thereby, as shown in FIG. 4 and FIG.
Both ends of the movable boot B to be put on the constant velocity joint J are fastened by the clamp 1.

The number of the bent portions 36 of the connecting band 3 may be three or more. Further, the structure of the pair of hooks of the clamp may be the same or the same on the left and right, or may be another structure.

[Brief description of the drawings]

FIG. 1 is a perspective view of a clamp according to the present invention.

FIG. 2 is an assembly view of the clamp of the present invention.

FIG. 3 is a view showing a use state of the clamp of the present invention.

FIG. 4 is a view showing a process of attaching a clamp according to the present invention.

FIG. 5 is a diagram showing a use state of the clamp of the present invention.

FIG. 6 is a process diagram of attaching a conventional boot clamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamp 2 Band 3 Connection band 4, 5 Hook part of pinching tool 6 Engagement means 61 Right side wall 62 Engagement element

Claims (3)

(57) [Claims] 1. A band formed of a metal plate having a substantially cylindrical surface, the other end of which overlaps the outer periphery of one end, and disposed along the outer surfaces of both ends of the band.
The other end is connected to a position separated by a required distance from one end of the band, and a band-shaped sheet metal connecting band provided with a band holding portion in which the other end of the band is slidably inserted at one end, One end of the connection band, a hook portion of a pair of pinching tools provided at a position separated by a required distance from the other end of the band, and a wavy bent portion formed in the connection band and inclined to the one end side. , And an engaging means formed on the other end of the band, the elastic engaging member engaging with the lower surface of the bent portion. 2. The engaging element according to claim 1, wherein the engaging element is provided with a notch having an uncut portion at a tip end portion at the other end of the band, thereby causing a portion surrounded by the notching line to be outward. A clamp characterized in that it is formed. 3. The clamp according to claim 1, wherein an end of a grease boot covering a constant velocity joint of an automobile is fastened to a drive shaft.