JPH1038165A - Hose clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly fasten a hose along the irregular shape on the connecting pipe side around which a hose is fitted by a hose clamp. SOLUTION: This hose clamp 10 is formed by connecting many unit clamp members 11 made of metal and having ring shapes. A thin, long and metallic linear material having elasticity is used as a unit clamp member and bent to form a small-diameter and ring-shaped binding ring part 12, both ends are arranged on the same flat surface as the binding ring part and also on the opposite side to the binding ring part to form a large-diameter ring-shaped fastening ring part 13. Both ends of overlapping part on the tip side of the fastening ring part are bent outward in the radial direction, and a large-diameter part 14 having an approximately semicircular shape is provided. A plurality of unit clamp members are overlapped and bound in the aligned state by inserting a binding bar 15 through the binding ring part. The fastening ring part is extended by moving the large diameter part, and the hose clamp is fitted to the connecting part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose clamp for use in a motor vehicle, a machine, a device, or the like, for fastening a hose fitted to a connection pipe to the connection pipe.

[0002]

2. Description of the Related Art
As this type of hose clamp, for example,
A spring ring as disclosed in Japanese Patent No. 1074 is known (see FIG. 7). This spring ring is formed in a ring shape by winding a spring wire into 1.5 turns or more, and the inner diameter of the ring 1 is smaller than the outer diameter of the hose to be mounted in a state where no force is applied. This ring 1
An end piece 2 for applying a force for expanding the ring 1 at both ends is formed by bending outward in the radial direction, and the end piece 2 is expanded by applying a force in the direction of F to a hose fitted to the connection pipe. The hose is clamped by the force when the diameter of the ring 1 is reduced by being mounted on the outer periphery of the ring.

[0003] However, the entire spring ring is uniformly shrunk in the radial direction, so that the hose can be tightened. However, the diameter of the spring ring can be locally reduced in accordance with a change in the radial direction with respect to the axial direction of the hose. It is not possible to uniformly tighten the hose at each part in the axial direction. Also, when trying to expand the diameter of the spring ring, it is necessary to support the spring ring because the force F applied to both end pieces 2 acts in parallel, and it is difficult to expand the diameter. There is a problem that it is difficult to attach to a pipe.

On the other hand, for example, Japanese Patent Laid-Open No.
As shown in Japanese Patent Publication No. 3 (see FIG. 8), one end 4 and the other end 5 are formed in a cylindrical shape from a metal plate having spring elasticity, and are positioned substantially parallel to the axial direction. There is known a hose clip that tightens a hose by reducing the diameter of the cylindrical portion 3 by relatively moving in the opposite circumferential direction. The diameter of the hose clip is reduced in the radial direction, and a constant diameter is reduced in the axial direction within a range of the width. But,
The outer periphery of the connection pipe to which the hose is fitted is provided with a tip bulge part, a spool part, a corrugated part with a sawtooth cross section called a mushroom shape, etc., and the hose clip is axially within its width. Since the diameter is reduced uniformly, there is a problem that it is not possible to appropriately clamp the entire clamping portion along the shape of the connection pipe. An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a hose clamp that can perform appropriate tightening along the uneven shape on the outer periphery of a connection pipe inserted into a hose.

[0005]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, a structural feature of the invention according to claim 1 is a hose clamp mounted on an outer peripheral surface of a connection end of a hose. A ring-shaped unitary clamp member formed by rolling a linear or circular metal wire having a resilient cross section along the longitudinal direction, and a plurality of unitary clamp members in the axial direction of the ring shape. Aligned parallel to each other,
There is provided a restraining member for connecting one portion of each single clamp member to each other in the axial direction to maintain an aligned state.

In the invention according to claim 1 configured as described above, a plurality of unit clamp members are overlapped in an aligned state, and one portion of each single clamp member is restrained by using a restraining member. Can be easily assembled into a hose clamp. Then, the diameter of the plurality of unit clamp members constrained in the aligned state is expanded and fitted to the connection end of the hose. The multiple unit clamp members thus bundled are urged in the diameter reducing direction by their elastic force, so that the hose clamp is securely attached to the hose and does not come off.

Next, when the hose with the hose clamp is fitted to the connecting pipe, the hose follows the corrugated portion such as a corrugated portion at the tip of the connecting pipe and has a radially uneven shape. Deform. In response to this, the unit clamp members of the hose clamp also change independently of each other according to the uneven shape of the outer periphery of the hose, so that the hose and the connection pipe are securely fastened regardless of the outer circumference shape on the connection pipe side.
For this reason, the pull-out resistance and the sealing property of the hose connection portion are improved to an optimum state. In addition, since each unit clamp member is urged in the diameter reducing direction by its elastic force, it can compensate for settling of the hose in use, and maintain good pull-out resistance and sealability of the hose connection for a long time. can do.
In addition, by performing optimal tightening according to the uneven shape of the connection portion by each unit clamp member, the tightening force of each unit clamp member can be made weaker than the conventional hose clamp, and as a result, the hose Outer fitting to the connecting pipe is made easier.

A structural feature of the invention according to claim 2 is a hose clamp made of a metal wire having a rectangular or circular cross section and having a spring property, which is mounted on the outer peripheral surface of the connection end of the hose. A small ring-shaped tying loop portion formed at a substantially central portion in the length direction of the filament material, and a large ring shape connected to the outer end of the tying loop portion, and a tip portion of the filament material A united clamping member having a fastening ring portion provided with an overlapping portion movably overlapped by sliding contact with each other, and a pair of enlarged pieces bent radially outward at both ends of the overlapping portion; and A plurality of clamp members are aligned and overlapped, and a binding rod is inserted into the binding ring portion, bound and restrained, and the enlarged diameter piece is moved along the overlapping portion, so that the aligned plurality of fastening ring portions is formed. External fitting to a hose with the diameter increased.

[0009] In the invention according to claim 2 configured as described above, a plurality of unit clamp members obtained by subjecting a metal wire material to bending or the like are superposed in an aligned state, and a united loop portion is formed. By inserting a tie rod into the hose clamp, it can be easily assembled into a hose clamp. And
The hose clamps that are bundled in a line
The enlarged diameter portions are moved closer to each other along the overlapping portion to enlarge the diameter of the fastening ring portion, and the enlarged diameter of the fastening ring portion can be attached to the hose. As a result, the hose clamp is urged in the diameter reducing direction by its elastic force, so that the hose clamp is securely attached to the hose and does not come off. Further, as for the operation and effect when the hose with the hose clamp is fitted to the connection pipe, the same operation and effect as those described in claim 1 can be obtained.

A structural feature of the invention according to claim 3 is a hose clamp attached to an outer peripheral surface of a connection end of a hose, wherein the hose clamp has a square or circular cross section having a spring property. The material is formed into a ring shape by rolling the material in the longitudinal direction, and the fastening ring portion provided with an overlapping portion movably overlapped in a state in which the distal end portions of the wire material are slid in contact with each other, and at both ends of the overlapping portion, A unit clamp member having a pair of enlarged pieces bent radially outward, and a plurality of unit clamp members are aligned in parallel with each other in the axial direction of the ring shape, and one portion of each unit clamp member is An object of the present invention is to externally fit a plurality of connected fastening ring portions to a hose in a state where the plurality of connected fastening ring portions are expanded in diameter by being connected to each other by a restraining member in an axial direction and moving the enlarged diameter piece along the overlapping portion.

In the invention according to claim 3 configured as described above, since the restraining member is used as a connecting member of the unit clamp member, a joining configuration is also possible, and it can be integrally formed as a part of the unit clamp member. The degree of freedom of the configuration can be increased. Also, by moving the enlarged diameter portion so as to approach each other along the overlapping portion to enlarge the diameter of the fastening ring portion, and attaching the enlarged fastening ring portion to the hose,
Since a large number of unit clamp members are urged in the diameter reducing direction by their elastic force, the hose clamp is securely attached to the hose and does not come off. Further, as for the operation and effect when the hose with the hose clamp is fitted to the connection pipe, the same operation and effect as those described in claim 1 can be obtained.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a rubber hose 20 according to a first embodiment and a connection pipe 30 to which the hose 20 is connected. FIG. 2 is a perspective view schematically showing a hose clamp 10 used for tightening a connection portion with the hose.

As shown in FIG.
Metal ring-shaped unit clamp member 1 having elasticity
1 is constituted by connecting a large number in the axial direction of the hose 20 as shown in FIG. The unit clamp member 11 is shown in FIG.
As shown in (a) and (b), a small-diameter ring-shaped tying ring is formed by using an elongated metal spring wire having elasticity and bending the wire at a substantially central position in the longitudinal direction of the wire. Part 1
2 are provided. The wire material extending from both ends of the binding loop 12 is coplanar with the binding loop 12 and
Is formed on the large-diameter ring-shaped fastening ring portion 13 adjacent to the opposite side of the wire member, and a predetermined length of the distal end portion of the wire material is formed as an overlapped portion 13a which is in sliding contact with each other and overlaps.
Both ends of the overlapping portion 13a are bent toward the outside in the radial direction, and form an enlarged diameter portion 14 which is further bent into a substantially semicircular shape. Then, the unit clamp members 11 are overlapped with the binding ring portion 12, the fastening ring portion 13, and the enlarged-diameter portion 14 together, and bundled in the aligned state through the binding rod 15 through the binding ring portion 12. It is summarized in.

Next, the hose 20 of the hose clamp 10
The following describes application to the present invention. First, the hose clamps 10 bundled in an aligned state by the binding rod 15 are moved using a jig or the like so that the enlarged diameter portions 14 are moved closer to each other along the overlapping portion 13a, and the fastening ring portion 13 is moved. Increase the diameter.
The enlarged diameter of the fastening ring 13 is fitted to the hose 20. Each unit clamp member 11 is urged in the diameter-reducing direction by its elasticity, so that it is securely attached to the outer periphery of the hose 20.

Next, with the hose clamp 10 mounted, the hose 20 is inserted into the corrugated portion 32 of the connection pipe 30 as shown in FIG. Press until it hits the stopper 31 Along with the insertion, the outer periphery of the hose 20 is pushed by the corrugated portion 32 and deforms into an uneven shape in the radial direction. In response to this, the hose clamp 10 mounted on the outer periphery of the hose is connected to the connecting pipe 30 since the unit clamp members 11 are irregularly expanded in accordance with the irregular shape of the outer periphery of the hose 20 independently of each other.
As shown in FIG. 3B, the outer fitting of the hose 20 to the connection pipe 30 can be easily performed even when the outer peripheral shape has a bulge portion 33 and a spool portion 34 which are bulged in the radial direction, as shown in FIG.

Therefore, in the hose connection portion having the unevenness, the hose clamp 10 enhances the pull-out resistance and the sealing property of the connection structure to an optimum state. In addition, since each unit clamp member 11 is urged in the diameter reducing direction by its elastic force, it is possible to supplement the set of the hose 20 in use, and to improve the pull-out resistance and the sealability of the connection portion over a long period of time. Can be maintained.

Further, since the optimum clamping is performed by each unit clamp member 11 according to the uneven shape of the connecting portion, the tightening force of each unit clamp member 11 itself is weaker than the conventional hose clamp which cannot perform proper tightening. As a result, the outer fitting of the hose 20 to the connection pipe 30 is more easily performed. Furthermore, hose clamp 1
0 indicates that all the enlarged diameter portions 14 are simultaneously approached and the fastening ring portion 1
Without the jig for expanding the diameter of 3, the impression that it is difficult to disassemble is given, so that the connection part can be prevented from being removed by a general user, and the reliability of the connection part between the hose and the connection pipe is maintained.

Next, a modification of the first embodiment will be described with reference to FIG. In the modified example, the unit clamp member 41 uses an elongated metal spring wire having elasticity, similar to the unit clamp member 11 shown in the above-described embodiment, and is disposed at a substantially central position in the length direction of the wire. A small-diameter ring-shaped binding ring portion 42 which is bent and bent, and a large-diameter ring-shaped fastening ring portion 43 extending from both ends thereof are provided. However, the distal end portions of the fastening ring portion 43 are separated from each other,
It differs from the unit clamp member 11 in that both tip portions are bent toward the outside in the radial direction, and are formed into a large-diameter portion 44 that is further bent in a substantially circular shape. A plurality of the unit clamp members 41, the binding ring portion 42, the fastening ring portion 43, and the enlarged diameter portion 44 are put together and overlapped, and the binding rod 15 is attached to the binding ring portion 42.
And bundled in an aligned state to form a hose clamp (not shown). This hose clamp has substantially the same effect as the hose clamp 10.

Next, a second embodiment will be described with reference to FIG. As shown in FIG. 5A, the hose clamp 50 connects a large number of unit clamp members 51 made of elastic metal ring as shown in FIG. It is composed.
The features of the hose clamp 50 include a fastening ring portion 52 that forms the restraining member 54 and the unit clamp member 51, and an overlapping portion 52.
a and the respective elements of the enlarged diameter portion 53 are integrally formed from a metal spring plate material by punching, and thereafter, the fastening ring portion 52, the overlapping portion 52a, and the enlarged diameter portion 53 of the unit clamp member 51 are formed. Is to be done. That is, the elongated band-shaped restraining member 54 having a predetermined width b is disposed at the center, and a plurality of sets of tongue pieces having a predetermined width c protruding left and right are arranged at intervals d. And a predetermined width c
Of the tongue is bent around the restraining member 54 to form a large-diameter ring-shaped fastening ring 52, and a predetermined length of the tip of the tongue is slid in contact with each other to form an overlapping portion 52a. It is formed. Both ends of the overlapping portion 52a are radially outwardly bent to form an enlarged diameter portion 53 that is further bent in a substantially semicircular shape. Then, the tongue pieces are sequentially formed in the same manner, and the plurality of unit clamp members 51 can be configured with the predetermined gap d, and are combined into the hose clamp 50.
Regarding the hose clamp 50 formed as described above,
By expanding the diameter of the fastening ring 53 and attaching it to the outer periphery of the hose 20, the same effect as the hose clamp 10 can be obtained.

Next, a modification of the second embodiment will be described with reference to FIG. In the modified example, the hose clamp 60 is provided with a ring-shaped fastening ring portion 62 bent around the restraining member 64 using a spring plate material, similarly to the hose clamp 50 shown in the second embodiment. . However, the distal end portions of the fastening ring portion 62 are separated from each other, and both distal end portions are bent outward in the radial direction,
Further, it differs from the unit clamp member 51 in that it has an enlarged diameter portion 63 that is bent into a substantially circular shape. With this hose clamp 60, substantially the same effect as that of the hose clamp 50 can be obtained.

In the above-described embodiment, the hose clamp is attached to the hose and is externally fitted to the connecting pipe. However, after the hose is externally fitted to the connecting pipe, the hose clamp is fitted to the connecting portion. You may.

[Brief description of the drawings]

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

FIG. 2 is a front view and a side view schematically showing a unit clamp member constituting the hose clamp.

FIG. 3 is a sectional view schematically showing a use state of the hose clamp.

FIG. 4 is a front view schematically showing a unit clamp member according to a modification of the first embodiment.

FIG. 5 is a front view showing a unit clamp member according to a second embodiment and a side view showing a hose clamp.

FIG. 6 is a front view illustrating a unit clamp member according to a modification of the second embodiment, and a side view illustrating a hose clamp.

FIG. 7 is a perspective view schematically showing a conventional hose clamp.

FIG. 8 is a perspective view schematically showing another conventional hose clamp.

[Explanation of symbols]

10 ... Hose clamp, 11 ... Unit clamp member, 12
... Bundling ring part, 13 ... Tightening ring part, 13a ... Overlapping part, 1
4 ... Diameter enlarged part, 15 ... Binding rod, 20 ... Hose, 20a ... Fitting groove, 30 ... Connection pipe, 31 ... Stopper, 32 ... Corrugated part, 41 ... Unit clamp member, 42 ... Binding ring part, 43 ...
Tightening ring part, 44 ... enlarged diameter part, 50 ... hose clamp, 51
... Unit clamping member, 52 ... Tightening ring part, 53 ... Expanded diameter part,
54 ... restraint member, 60 ... hose clamp, 61 ... unit clamp member, 62 ... fastening ring portion, 63 ... enlarged diameter portion, 64 ... restraint member.

Claims (3)

[Claims] 1. A hose clamp attached to an outer peripheral surface of a connection end of a hose, wherein the hose clamp is formed by rolling a metal wire having a rectangular or circular cross section having a spring property along a longitudinal direction. A ring-shaped unitary clamp member and a plurality of such unitary clamp members are aligned in parallel with each other in the axial direction of the ring shape, and one part of each unitary clamp member is connected to each other in the axial direction to maintain the aligned state. A hose clamp provided with a member. 2. A hose clamp made of a metal wire having a rectangular or circular cross section and having a spring property, which is mounted on an outer peripheral surface of a connection end of a hose, and is substantially centered in a longitudinal direction of the wire. A small ring-shaped tying loop formed by the portion and a large ring formed by being connected to the outer end of the tying loop, and the leading end portions of the linear members slidingly contacting each other and movably overlapping. A unit clamping member having a fastening ring portion provided with a portion, a pair of enlarged pieces bent radially outward at both ends of the overlapping portion, A state in which a plurality of the fastening ring portions arranged are expanded by moving the expanding piece along the overlapping portion by binding and binding a binding rod through the binding ring portion and moving the enlarged piece along the overlapping portion. A hose clamp, which is externally fitted to the hose with . 3. A hose clamp attached to an outer peripheral surface of a connection end of a hose, wherein the hose clamp is formed in a ring shape by rolling a metal wire having a rectangular or circular cross section having a spring property in a longitudinal direction. A fastening ring portion having an overlapping portion movably overlapped with the leading end portions of the linear members slidingly in contact with each other, and a pair of radially enlarged portions bent radially outward at both ends of the overlapping portion. A unit clamping member having a piece,
A plurality of the same unit clamp members are aligned in parallel with each other in the axial direction of the ring shape, one portion of each single clamp member is connected to each other by a constraint member in the axial direction, and the enlarged piece is formed along the overlapping portion. A hose clamp characterized in that the hose clamps are externally fitted to the hose in a state in which the plurality of connected fastening ring portions are expanded in diameter by being moved.