JP2001153284A - Hose clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To furnish a temporarily fixing function and to easily insert a fastening object such as a rubber hose into a fastening ring part. SOLUTION: This hose clamp is furnished with a clamp body 1 constituted by forming a guide groove 10 on a fastening ring part 11 curved and formed in an annular shape, arranging one end part on this guide groove 10 and forming grip parts 12 on both end parts and to extend the fastening ring part 11 by making each of grip parts 12 approach each other and a holder body 2 holding an approaching state of the same parts by externally fitting it on each of the grip parts 12 of the clamp body 1 and from a proper part of which an temporary stopping arm 21 is extended. The temporary stopping arm 21 curves and forms an intermediate part 21a and it is shaped so as to enter a hollow part of the fastening ring part 11 from the guide groove 10. Consequently, it is possible to draw out the temporary stopping arm 21 from the other end opening part of the fastening ring part 11 by passing it beside the temporary stopping arm 21 in the fastening ring part 11 by inserting a fastening object such as a rubber hose into the fastening ring part 11 of the clamp body 1 from one end opening part, and accordingly, insertion work of the rubber hose etc., to the fastening ring part 11 is fascilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a hose clamp having a temporary fixing function, among hose clamps for fastening a rubber hose or the like to an end of a connection pipe.

[0002]

2. Description of the Related Art As a conventional hose clamp of this kind,
For example, there is one disclosed in Japanese Utility Model Laid-Open No. 25796/1990.
Although not specifically shown, this conventional hose clamp includes a clamp body formed of an annular tightening ring portion and a pair of grip portions, and a holder for holding the pair of grip portions in a close state. It has. In a state where the pair of grip portions are held by the holder, the diameter of the tightening ring portion is enlarged. In this state, the rubber hose is inserted through the tightening ring portion, and the rubber hose is fitted into the end of the connection pipe. By removing the holder from the grip portion and opening the pair of grip portions, the diameter of the tightening ring portion is reduced by its own elastic force, and the rubber hose is tightened and fixed to the connection pipe.

Further, two presser arms extend from the holder, and these two presser arms are configured to elastically press against the peripheral surface of a rubber hose inserted into a tightening ring portion. Therefore, in the conventional hose clamp, even if the rubber hose to be tightened has a relatively small diameter, the rubber hose is sandwiched and temporarily fixed by the tightening ring portion and the holding arm. Even when fitting into a pipe, there is an advantage that the fastening operation can be stably performed without inadvertent movement.

[0004]

However, in the above-described conventional hose clamp, since the two pressing arms are arranged outside the tightening ring (outside in the axial direction), the rubber hose is connected to the tightening ring. When inserting the rubber hose, first, a rubber hose is brought into contact with one of the holding arms to elastically bend the holding arm, and then the rubber hose is inserted into the tightening ring, and then the other holding arm is brought into contact with the holding arm. I had to flex my arm elastically.

[0005] That is, before and after the rubber hose is inserted into the tightening ring, the two presser arms are in the way, so that the work of inserting the rubber hose into the tightening ring has been troublesome.
The present invention has been made in view of such circumstances,
An object of the present invention is to provide a hose clamp having a temporary fixing function and capable of easily inserting a tightening target such as a rubber hose into a tightening ring portion.

[0006]

According to a first aspect of the present invention, a guide groove is formed in an annularly curved tightening ring, and one end of the guide groove is formed in the guide groove. And a clamp body in which grip portions are formed at both ends, and the tightening ring portion is expanded in diameter by bringing the grip portions close to each other, and the clamp body is externally fitted to each grip portion of the clamp body. A holder body for maintaining the approaching state of the same portion and a temporary fixing arm extending from an appropriate position, wherein the temporary fixing arm has a curved intermediate portion, and the intermediate portion is provided with a fastening ring from the guide groove. It is characterized in that it has a shape that enters into the hollow part of the part.

According to a second aspect of the present invention, based on the first aspect, the temporary fixing arm has a cross-sectional shape in which at least a region entering the hollow portion of the tightening ring portion is bent or curved with its center substantially at the top. There is a feature.

[0008] The invention described in claim 3 is claim 1 or 2.
On the premise of the above, the temporary fixing arm is characterized in that the distal end is exposed from the guide groove.

According to a fourth aspect of the present invention, based on the third aspect, the tip of the temporary fixing arm is wider than the guide groove.

According to the first aspect of the present invention, a tightening target such as a rubber hose is inserted into the tightening ring portion of the clamp body from one end opening, and is passed through the side of the temporary fixing arm in the tightening ring portion. Then, it is sufficient to pull out from the other end opening of the tightening ring, so that it is easy to insert a rubber hose or the like into the tightening ring.

Further, according to the second aspect of the present invention, the edge portion of the temporary fixing arm escapes in the outer diameter direction of the tightening ring portion, and a rubber hose having a relatively large diameter is inserted into the tightening ring portion. In this case, the rubber hose or the like comes into contact with an inclined surface or a curved surface formed at an intermediate portion of the temporary fixing arm. Therefore, the insertion pressure of a rubber hose or the like acts on the inclined surface or the curved surface, and the intermediate portion of the temporary fixing arm can be bent in the radial direction of the tightening ring portion by the radial component of the acting force. For this reason, even if a relatively large diameter rubber hose or the like is to be tightened, the temporary fixing arm does not become a barrier, and the work of inserting the rubber ring into the tightening ring portion can be easily performed.

According to the third aspect of the present invention, the intermediate portion disposed in the hollow portion of the tightening ring portion can be easily operated by operating the distal end portion of the temporary fixing arm exposed to the outside from the guide groove of the clamp body. By bending it, it is possible to secure a track for inserting a rubber hose or the like in the tightening ring, so that even when a relatively large diameter rubber hose or the like is to be tightened, the work of inserting the rubber hose or the like into the tightening ring can be performed more easily. be able to.

According to the fourth aspect of the present invention, it is possible to reliably prevent the distal end portion of the temporary fixing arm from entering the hollow portion of the tightening ring portion from the guide groove, regardless of the mounting state of the holder body to the clamp body. Therefore, the operation according to the third aspect of the present invention can be compensated.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 are views showing a hose clamp according to the embodiment of the present invention,
1 is a perspective view of the hose clamp, FIG. 2 (A) is a perspective view of the clamp body, FIG. 2 (B) is an exploded perspective view of the hose clamp, and FIG. 3 is a view for explaining the operation of the hose clamp. It is sectional drawing.

As shown in these drawings, the hose clamp according to the embodiment of the present invention comprises a clamp body 1 and a holder body 2. The clamp body 1 is shown in FIG.
As shown in FIG. 1A, a metal strip having a guide groove 10 cut out to a required length near one end is formed, and this metal strip is curved in an annular shape to form a tightening ring portion 11. At the same time, both ends are bent outward to form the grip portion 12. A region 13 extending from one end to a required length is formed narrower than the guide groove 10, and the region 13 is arranged in the guide groove 10 so that both ends cross each other. In this clamp body 1, by pressing the grip portions 12 in directions approaching each other, the tightening ring portion 11 elastically expands in diameter as shown in FIG. 2B. In addition,
The clamp body 1 may have a two-layer structure in which an annular reinforcing plate (not shown) is superposed on the outside in order to increase the tightening and fixing force.

In the present embodiment, the holder 2 is formed of a resin material, and has a structure in which a base 20 and one temporary fixing arm 21 extending from the base 20 are integrally formed. The base 20 has a groove 22 into which the grip portions 12 of the clamp body 1 approaching each other can be fitted, and a projection 23 used to release the fitted state of the grip portion 12 using a tool such as pliers. is there.

The temporary fixing arm 21 extending from the base 20 is formed in a curved shape, and the intermediate portion 21a thereof is
The width corresponding to the width of the guide groove 10 formed at
(A width that can be inserted into the guide groove 10 without play). For example, the width of the intermediate portion 21a is formed to be about 0.1 mm narrower than the width of the guide groove 10. This temporary fixing arm 2
1 is a state in which the base portion 20 is externally fitted to the grip portions 12 of the clamp body 1 which are brought close to each other (hereinafter, referred to as “the intermediate portion 21a”).
(It may also be referred to as "the state of attachment to the clamp body 1.")
Then, it is disposed in the hollow portion of the tightening ring portion 11 through the guide groove 10 (see FIGS. 1 and 3A). Here, since the intermediate portion 21a of the temporary fixing arm 21 is formed to have a width corresponding to the width of the guide groove 10, even when the rubber hose is inserted into the hollow portion of the tightening ring portion 11, as described later, the guide groove is formed. 10 is stably supported without rattling. Therefore, there is no possibility that the base 20 of the holder body 2 fitted to each grip portion 12 of the clamp body 1 may be accidentally detached due to the looseness of the temporary fixing arm 21, and the rubber hose can be stably inserted. it can.

As shown in FIG. 1 or FIG. 2 (b), the temporary fixing arm 21 is formed to bend in a V-shaped cross section with the substantially center of the cross section being the top. The bent portion may be formed only in the region arranged in the hollow portion of the tightening ring portion 11, and the other region may have an arbitrary cross-sectional shape in consideration of ease of molding and imparting strength. be able to. Although the figure is bent in a V-shaped cross section, the cross section may be curved, for example, with the top substantially at the center of the cross section. In short, it is only necessary that the center of the cross-section be arranged closest to the center of the tightening ring portion 11 when it is disposed in the hollow portion of the tightening ring portion 11 and the edge shape escape in the outer diameter direction.

Further, the temporary fixing arm 21 is dimensioned so that the distal end portion 21b is exposed from the guide groove 10 of the clamp main body 1 when the temporary fixing arm 21 is mounted on the clamp main body 1.
The distal end 21b is formed wider than the guide groove 10 (see FIG. 1).

FIG. 2B shows a hose clamp having the above structure.
As shown in (1), each grip portion 12 of the clamp body 1 is pressed in a direction approaching each other to elastically expand the diameter of the tightening ring portion 11, and in this state, the base 20 of the holder body 2 is attached to each grip portion 12. The outer diameter of the tightening ring portion 11 is maintained by fitting to the outside. Then, as shown in FIG. 3A, a tightening target such as a rubber hose (hereinafter described as a rubber hose 30) is inserted into the hollow portion of the tightening ring portion 11 from one end opening, and the side of the temporary fixing arm 21 is inserted. Is pulled out from the opening at the other end so that the hose clamp can be arranged on the outer periphery of the rubber hose 30.

The diameter of the rubber hose 30 is equal to the tightening ring 1
1 and the space D between the temporary fixing arm 21 (FIG. 3).
(See (A)). When it is larger, the tip of the rubber hose 30 abuts on the intermediate portion 21a of the temporary fixing arm 21 in the hollow portion of the tightening ring portion 11. However, if the rubber hose 30 is further pushed in, the center of the temporary fixing arm 21 is removed. The tip of the rubber hose presses the inclined surface formed over the edge, and the temporary fixing arm 21 bends in the outer radial direction with a radial component of the pressing force, so that the rubber hose 30 insertion path is secured.

When the diameter of the rubber hose 30 is large and its peripheral edge is located outside the edge of the temporary fixing arm 21 in the hollow portion of the tightening ring 11, or when it is necessary to insert the rubber hose 30 more easily. The tip 21b of the temporary fixing arm 21 exposed from the guide groove 10 may be appropriately pulled up. By this operation, the intermediate portion 21a of the temporary fixing arm 21 bends in the outer diameter direction, so that the insertion track of the rubber hose 30 can be easily secured.

As described above, when the temporary fixing arm 21 is bent and the rubber hose 30 is inserted, the temporary fixing arm 21
Presses the peripheral surface of the rubber hose 30 and presses against the inner wall of the tightening ring portion 11, so that the hose clamp is
0 is securely fixed (temporarily fixed) at the required position.

On the other hand, the diameter of the rubber hose 30 is the distance D between the inner wall of the tightening ring 11 and the temporary fixing arm 21 (FIG. 3).
(See (A)) If smaller, the rubber hose 30 can be inserted through the tightening ring portion 11 without contacting the temporary fixing arm 21. Also in this case, the temporary fixing arm 21
The inner wall of the tightening ring 11 and the rubber hose 3
Since the clearance between 0 and 0 is narrow, the clamp body 1 is slightly inclined with respect to the rubber hose 30, and is caught without largely changing the posture, so that the hose clamp can be held at a required position.

With the hose clamp temporarily fixed as described above, the end of the rubber hose 30 is fitted into the connection pipe, and then, as shown in FIG.
0 is removed from the grip 12 of the clamp body 1. This work is performed by grasping the projection 23 formed on the base 20 with a tool such as a pliers and pulling it off. In addition, provided that the temporary fixing arm 21 has sufficient strength, the distal end portion 21b of the temporary fixing arm 21 can be used as a knob when removing the holder body 2 from the grip portion 12. That is, by lifting the tip 21b of the temporary fixing arm 21, the holder body 2 can be removed without requiring a special tool such as a pliers.

When the holder body 2 is detached from the grip part 12, the tightening ring part 11 of the clamp body 1 is reduced in diameter by its own elastic force, and the rubber hose 30 is tightened and fixed to the connecting pipe. In the present embodiment, since the holder body 2 is formed of a resin material, the base 20 is formed with the grip portion 1 of the clamp body 1 with a weaker force than when formed of a metal material.
2 can be removed. Also, the tightening ring 11
Even if the temporary fixing arm 21 is elastically pressed against the rubber hose 30 in the hollow part, the rubber hose 30 is hardly damaged due to the flexibility of the resin material. Furthermore, it is easy to give the holder body 2 a conspicuous color, which is effective for preventing the holder body 2 from being forgotten to be removed.

On the other hand, as shown in FIGS. 4 and 5, the holder 2 can be formed of a metal material. Also in this case, the temporary fixing arm 21 is moved from the base 20 of the holder body 2.
Is curved and extended, and the temporary fixing arm 21 is
The intermediate portion 21 is attached to the clamp body 1 in the mounted state.
a is disposed in the hollow portion of the tightening ring portion 11 through the guide groove 10, and the tip end 21 b is exposed from the guide groove 10 of the clamp body 1. Furthermore, the temporary fixing arm 21 is formed to have a cross-sectional shape that is bent or curved with the substantially center of the cross-section being the top.

[0028]

As described above, according to the present invention,
The intermediate part of the temporary fixing arm is curved and this intermediate part enters the hollow part of the tightening ring part from the guide groove of the clamp body. It can be easily inserted into the fastening ring.

[Brief description of the drawings]

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

FIG. 2A is a perspective view of a clamp body, and FIG. 2B is an exploded perspective view showing a hose clamp.

FIG. 3 is a cross-sectional view for explaining an operation of the hose clamp.

FIG. 4 is a perspective view of a hose clamp according to another embodiment of the present invention.

FIG. 5 is a sectional view of the hose clamp shown in FIG. 4;

[Explanation of symbols]

 1: Clamp body 2: Holder body 10: Guide groove 11: Tightening ring part 12: Grip part 20: Base 21: Temporary fixing arm 22: Groove 23: Projection

Claims (4)

[Claims] 1. A guide groove is formed in an annularly curved tightening ring portion, and one end portion is disposed in the guide groove, and grip portions are formed at both end portions. A clamp body in which the tightening ring portion expands in diameter by bringing the portion close to each other; and a holder in which the temporary fixing arm extends from an appropriate position while externally fitting to each grip portion of the clamp body to maintain the close state of the same. And a body, wherein the temporary fixing arm forms a curved intermediate portion,
A hose clamp characterized in that the intermediate portion is formed into the hollow portion of the tightening ring portion from the guide groove. 2. The hose clamp according to claim 1, wherein at least a region of the temporary fixing arm that enters the hollow portion of the tightening ring portion has a cross-sectional shape that is bent or curved with a substantially central portion as a top. . 3. The hose clamp according to claim 1, wherein a tip portion of the temporary fixing arm is exposed from the guide groove. 4. The hose clamp according to claim 3, wherein a tip end of the temporary fixing arm is wider than the guide groove.