JPH07119720A - Hose clip - Google Patents

Abstract

PURPOSE:To maintain a good securing state by following the settling of hoses. CONSTITUTION:A flat plate part 6 is formed by producing a band-like segment made of a metal in a ring shape and also by double winding, and by closely contacting its inner peripheral side with the outer peripheral face of hoses. A spring part 9 for allowing expansion in the peripheral direction is formed on its outer peripheral side. The spring part 9 is expanded with a hose clip H secured. With the hoses settled to reduce their outer diameter, the spring part 9 is returned and deformed to reduce the inner diameter of the whole hose clip H. Thus, the hose clip H maintains a good securing state by following the settling of the hoses.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose clip.

[0002]

2. Description of the Related Art Conventionally, a hose clip has been used to clamp a connecting portion such as a hose or a pipe. Most of this kind of hose clip is formed by bending a metal strip into an annular shape. Some of them are provided with an inner diameter adjusting means so as to be compatible with hoses having various outer diameters. As a well-known format,
Equipped with a worm screw operated by a screwdriver,
On the side of the strip plate, there is one in which a plurality of meshing grooves in which the worm screws are sequentially meshed are engraved along the circumferential direction. That is, by screwing the worm screw with the driver, the meshing position with the meshing groove is changed, and thereby one end of the strip is pulled in the tightening direction.

[0003]

By the way, in a hose used in a severe environment of temperature and humidity such as in an engine room of an automobile, deterioration is apt to proceed, and the so-called "fell" ( The phenomenon that the outer diameter is reduced and the hoses lose weight easily occurs. However, with the above-mentioned hose clip, once it is set in the tightened state, it is retained with its inner diameter. Therefore, even if the settling progresses, it cannot follow. Therefore, a gap may occur between the hose clip and the hose, and it is impossible to avoid a decrease in tightening force with time, resulting in poor reliability of connection.

The present invention has been developed and devised in view of this problem, and an object of the present invention is to provide a hose clip which can keep a good tightened state by following the fatigue of hoses. That is.

[0005]

The structure of the present invention for achieving the above object is a hose clip in which a metal strip is rolled into an annular shape, and the strip is at least double-wound. A flat plate portion for tightening the hoses is formed on the inner peripheral side, and a spring portion for allowing expansion and contraction in the circumferential direction is formed on the outer peripheral side.

[0006]

The hose clip fitted to the mouth of the hose clamps the hose with the flat plate portion in close contact with the outer periphery of the hose. In case of hose fatigue,
Since the spring portion shrinks in the direction of reducing the inner diameter of the hose clip, even if the outer diameter of the hoses is reduced, the spring portion closely follows this and maintains the tightened state.

[0007]

The effects of the present invention are as follows. Since the spring portion is formed on the outer peripheral side of the hose clip, the hoses are tightened while being stretched and deformed during use. Then, even if the hoses are settled with time, the inner diameter of the whole can be reduced by the contraction and deformation of the spring portion to cope with this, so that a good tightened state can always be maintained.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 shows a developed state of the hose clip H. The hose clip H is configured by rolling a metal (for example, stainless steel) strip 1 in an annular shape and in a double winding. A narrow first connecting portion 2 is arranged on one end side (the left end side in FIG. 2) of the strip 1. Two locking claws 3 shown in the drawing are provided at a position near the tip of the first connecting portion 2.
a and 3b are provided side by side in the length direction. Both the locking claws 3a and 3b are formed by cutting and raising along a U-shaped cut line. More specifically, both locking claws 3a and 3b are cut and raised so as to face the flat plate portion 6 and project outward. Further, the first connecting portion 2 is provided with a hooking piece 4 following the locking claws 3a and 3b. This hooking piece 4 is hooked with a dedicated tool when the hose clip H is contracted and deformed from the temporarily fixed state shown in FIG. The strip-shaped piece 1 is also provided with a hooking piece 5 corresponding to this, which will be described later. Both of the hooking pieces 5 are pressed so as to form a substantially semi-dome shape, and the one on the side of the first connecting portion 2 is processed so that its opening surface faces the flat plate portion 6. Also, in order to improve the catch of the tool,
The opening surface of the hooking piece 4 is made substantially orthogonal to the peripheral surface.

Further, a slit 7 is opened at a portion of the flat plate portion 6 which is located substantially in the center when viewed from the entire strip-shaped piece 1. The slit 7 is formed to be slightly wider than the width of the first connecting portion 2 described above and longer than the first connecting portion 2, and when the strip 1 is rolled into a temporarily fixed state, the slit of the first connecting portion 2 is formed. Almost the entire range is fitted in the slit 7 and has substantially the same curvature as the flat plate portion 6. .

On the other hand, a second connecting portion 8 is provided at the end of the strip 1 opposite to the side where the first connecting portion 2 is provided. The second connecting portion 8 has the above-described first connecting portion 2
A hooking piece 5 facing the side hooking piece 4 is arranged.
This hooking piece 5 is also formed by press working in the above-described manner, and opens toward the spring portion 9 side described later. In addition, a pair of locking holes 10a and 10b are opened in the second connecting portion 8 so as to sandwich the hooking piece 5. The two locking holes 10a, 10b are adapted to engage with the corresponding two locking claws 3a, 3b when the hose clip H is tightened.

Further, in the strip 1, the slit 7 and the second
A spring portion 9 is arranged between the connecting portion 8 and the connecting portion 8. Spring part 9
Is formed in a wavy shape that oscillates in the radial direction and is continuous along the length direction, and each corrugated portion is allowed to flex and deform in the expansion / contraction direction, whereby the entire length of the strip 1, that is, the hose. The inner diameter of the clip H can be expanded / contracted.

The length range from the tip of the first connecting portion 2 to the spring portion 9 is a hose clip when the strip 1 is rolled up to a temporarily fixed state and thereafter after being deformed to a tightened state. The inner circumference of H is formed, and the spring portion 9 forms part of the outer circumference. The hose clip H of this example is configured as described above. Hose clip H
Is in a temporarily fixed state as shown in FIG. 3, the hooking piece 4 on the first connecting portion 2 side is engaged with one end edge of the slit 7 (end edge near the spring portion 9). As a result, the entire body is restricted from returning to the expanded state, and the entire inner diameter is kept sufficiently larger than the outer diameter of the hoses (not shown) to be tightened.

With this temporarily fixed state, the hose clip H
Insert the hose into the hose and position it at the mouth of the hose.
Next, using a pliers-type tool, both hooking pieces 4, 5
And operate in the direction in which they approach. Then,
While the corrugated portions of the spring portion 9 are deformed in the extending direction, the first and second connecting portions 2 and 8 come close to each other, and the inner diameter of the hose clip H is gradually reduced accordingly. Tighten. Then, the second connecting portion 8 rides on the both locking claws 3a and 3b of the first connecting portion 2, and the corresponding both locking holes 10
When engaged with a and 10b, the hose clip H is held at an inner diameter capable of tightening the hoses with a predetermined tightening force. In this tightened state, the flat plate portion 6
Is closely attached along the outer circumference of the hoses, so that a uniform clamping force is applied to the entire circumference of the hoses.

When the hoses become tired or the hoses become thin over time, the corrugated portions of the spring portion 9 are gradually restored and deformed accordingly. That is, in the initial tightening state, the corrugated portion was elongated and lowered (see FIG. 4), but these contracted and gradually increased in height with the aging of the hoses. By such a deformation operation of the spring portion 9, the inner diameter of the hose clip H is gradually reduced, and the hose clips are well followed. Therefore, the hose clip H maintains a good tightening state regardless of the change with time of the hoses, and the reliability of the clamp for the hoses is enhanced.

The present invention can be modified in various ways,
The shape of the spring portion 9 may be, for example, a continuous kamaboko shape or a triangular shape. Further, in this example, the corrugated portion of the spring portion 9 is shown to have an amplitude in the radial direction of the hose clip H, but it is also possible to give an amplitude in the direction along the peripheral surface. In this case, it is also considered to form the spring portion 9 with a wire.

[Brief description of drawings]

FIG. 1 is a perspective view showing a temporarily fixed state.

FIG. 2 is a plan view showing a developed state.

FIG. 3 is a front sectional view showing a temporarily fixed state.

FIG. 4 is a front sectional view showing a tightened state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Strip-shaped piece 3a, 3b ... Locking claw 6 ... Flat plate part 9 ... Spring part 10a, 10b ... Locking hole H ... Hose clip

Claims (1)

[Claims] 1. A hose clip formed by rolling a metal strip into an annular shape, wherein the strip is at least double wound, and a flat plate portion for tightening hoses is formed on an inner peripheral side of the strip, and an outer peripheral side thereof is formed. A hose clip characterized in that a spring portion is formed on the outer circumference of the hose to allow expansion and contraction in the circumferential direction.