JP7473276B2 - Hose Fixtures - Google Patents

Description

The present invention relates to a hose fastener that tightens the connection between a pipe and a hose to prevent the hose from slipping out of the pipe.

In recent years, hose clamps (also called hose bands) have become known as fastening members that fasten hoses and piping (pipes) to prevent water and oil leaks. For example, such hose clamps secure the hose by maintaining a seal at the connection so that it does not come loose from the pipe in the engine compartment of an automobile.

Conventional hose clamps include, for example, a clip type, as disclosed in Patent Document 1, in which the diameter of a reduced diameter ring-shaped leaf spring is expanded by pinching the clamp, and a crimp type (worm gear type, etc.), as disclosed in Patent Document 2, in which the diameter of a ring band is expanded or contracted depending on the amount of engagement of the screw.

International Publication No. WO2011-099136 JP 2012-241838 A

However, in the hose clamp of Patent Document 1, although it is effective to reduce the free diameter of the spring clamp in the contracted state in order to ensure the sealing of the hose, there is a problem in that a large force is required to expand the spring clamp. Furthermore, with a hose clamp with a small contracted state, it is difficult to maintain the expanded state and overcome the bulge of the piping, which reduces workability.

In addition, the hose clamp of Patent Document 2 requires the use of tools such as a screwdriver when tightening screws, which makes it difficult to use in limited spaces such as the engine compartment of an automobile.

In view of the above, the present invention aims to provide a hose fastener that ensures sealing at the connection between the pipeline and the hose and is easy to use.

A hose fastener according to one aspect of the present invention is a hose fastener for fastening a connection between a pipe and a hose,
The hose includes a reticulated tube body that is arranged to cover the connecting portion, has an inner diameter smaller than the outer diameter of the hose in an initial state, contracts in diameter when stretched in the longitudinal direction, and expands to an inner diameter larger than the outer diameter of the hose when compressed in the longitudinal direction , an elastic member that stretches the reticulated tube body in the longitudinal direction, and a hooked portion that is provided on the hose and onto which the hook portion of the stretched elastic member is hooked .

The present invention provides a hose fastener that ensures a seal at the connection between the pipeline and the hose and is easy to use.

FIG. 1 is a perspective view showing a state in which the hose fixing device is attached to a connection portion between a radiator pipe and a radiator hose; FIG. 2 is an enlarged perspective view of the configuration of the hose fixture shown in FIG. 1 . FIG. 1 is a perspective view showing a configuration of a hose fixing device in an initial state; FIG. 1 is a perspective view showing a configuration of a hose fixing device in an expanded and reduced diameter state; FIG. 1 is a perspective view showing a configuration of a hose fixing device in a compressed and expanded state; Plan view showing the state before connecting the piping and radiator hose FIG. 1 is a plan view showing a state in which a hose fixing device is attached to a connection portion between a pipe and a radiator hose. FIG. 11 is a side view showing a configuration of a hose fixing device according to a modified example.

An embodiment of one aspect of the present invention will be described in detail below with reference to the drawings. Note that in the drawings used in the following description, each component is shown at a different scale so that it can be recognized on the drawing, and the present invention is not limited to the number of components, the shapes of the components, the size ratios of the components, or the relative positions of the components shown in these drawings.

In this embodiment, we will explain an example of a configuration in which a radiator hose is connected to the piping (pipe) of an automobile radiator and a hose fixing device is attached, but it can also fix the connection between various types of piping and tubes (hoses).

As shown in Figures 1 and 2, the hose fixing device 1 of this embodiment is attached to the connecting portion where the pipe 11 of the radiator 10 mounted in the engine room of an automobile and the radiator hose (hereinafter referred to as the hose) 12, which is a tube body, overlap.

As shown in FIG. 3, the hose fixing device 1 is configured to have a cylindrical clamping portion 2, which is a mesh tube body, and a plurality of tension springs 3, two in this case, which are elastic members provided on one end side of the cylindrical clamping portion 2. The number of tension springs 3 is not limited to two, and may be one or three or more.

The cylindrical clamping portion 2 is formed by weaving wires 5 made of metal wires such as stainless steel or resin wires such as aramid fiber or carbon fiber into a cylindrical shape. The two tension springs 3 are coil springs with one end fixed to a point-symmetrical position with respect to the central axis X, which is the longitudinal axis of the cylindrical clamping portion 2, and a hook portion 4 provided at the other end.

The tension spring 3 may be of a type having hook portions 4 at both ends, with one of the hook portions 4 hooked onto the cylindrical clamp portion 2.

When no stress is applied in the direction along the central axis X as shown in FIG. 3, the hose fixing device 1 is in an initial state in which the cylindrical clamping portion 2 along the central axis X has a length L0 and an inner diameter d0. Note that in the initial state, the inner diameter d0 of the cylindrical clamping portion 2 of the hose fixing device 1 is set to be smaller than the outer diameter of the hose 12 to be attached.

When a tensile load F1 is applied along the central axis X of the hose fixing device 1 as shown in FIG. 4, the length L1 of the cylindrical clamping portion 2 along the central axis X is elongated from the initial state (L1>L0), and the inner diameter d1 of the cylindrical clamping portion 2 is reduced from the initial state (d1<d0), resulting in an elongated contracted state.

When a compressive load F2 is applied along the central axis X as shown in FIG. 5, the hose fixing device 1 is in a compressed/expanded state with the cylindrical clamping portion 2 along the central axis X having a length L2 (L2<L0) and an inner diameter d2 (d2>L0). In the compressed/expanded state, the inner diameter d2 of the cylindrical clamping portion 2 of the hose fixing device 1 can be made larger than the outer diameter of the hose 12 to be attached.

When connecting the pipe 11 and the hose 12, the hose fastener 1 configured in this manner has the cylindrical clamp portion 2 in the compressed and expanded state shown in FIG. 5 inserted around the hose 12, as shown in FIG. 6.

When the hose fixing device 1 is connected so that the hose 12 covers the pipe 11, as shown in FIG. 7, the cylindrical clamp portion 2 is hooked to the ring-shaped portion 8, which is the hooked portion formed by the wire 7 fastened to the hose 12, and the hook portion 4 of each tension spring 3 is hooked to the ring-shaped portion 8, which is the hooked portion, as shown in FIG.

In this state, the cylindrical clamp portion 2 of the hose fixing device 1 is in the expanded and contracted state shown in FIG. 4 so as to cover, for example, the area from near the bulge portion 13 of the pipe 11 to the end of the hose 12.

In this example, the ring-shaped portion 8 is fastened to the hose 12 by the wire 7, but the outer skin of the hose 12 may be integrally formed with a hooked portion for hooking the hook portion 4 of each tension spring 3.

In this way, when the cylindrical clamp portion 2 of the hose fixing device 1 is extended while covering the connection portion between the pipe 11 and the hose 12, the cylindrical clamp portion 2 contracts in diameter, generating surface pressure in the inner diameter direction against the hose 12 to tighten it.

The cylindrical clamp portion 2 of the hose fixing device 1 is pulled in the extension direction by each tension spring 3, and the outer circumferential surface of the hose 12 is tightened to prevent the hose 12 from expanding and becoming loose, thereby maintaining a predetermined fixing strength.

Furthermore, the hose fixing device 1 has a cylindrical clamping section 2 that is a mesh tube made of woven wire 5. The mesh wire 5 tightens the hose 12 so that it creates unevenness on the surface, so the frictional force is large and it is difficult to shift, and therefore the outer surface of the pipe 11 and the inner surface of the hose 12 maintain close contact with each other, resulting in excellent sealing properties.

The hose fixing device 1 of the present embodiment described above does not require a large force to expand the diameter of a conventional spring clamp, and can easily expand the diameter by compressing the cylindrical clamp portion 2. Therefore, the hose fixing device 1 can easily overcome the bulge portion 13 of the pipe 11 while maintaining the expanded state of the cylindrical clamp portion 2, improving the workability when connecting the pipe 11 and the hose 12.

Furthermore, the hose fixing device 1 does not require any tools; it can be attached or detached simply by compressing and expanding the cylindrical clamp portion 2 placed over the hose 12 and hooking the hook portion 4 of each tension spring 3 onto or from the ring-shaped portion 8 of the hose 12. This makes it easy to attach and detach the device in a limited space, such as the engine compartment of an automobile.

As a result, the hose fixing device 1 of this embodiment ensures sealing at the connection between the pipe 11 and the hose 12, making it easy to use.

(Modification)
As shown in FIG. 8, the cylindrical clamp portion 2 of the hose fixture 1 may be formed by weaving a metal or resin strip 6 into a cylindrical shape.

Furthermore, the hose fixing device 1 may be configured such that one tension spring 3 that pulls the cylindrical clamping portion 2 in the extension direction is inserted onto the hose 12, or a spring that biases the cylindrical clamping portion 2 in the extension direction. In addition, the elastic member that extends the cylindrical clamping portion 2 is not limited to a spring, and may be replaced with various materials such as rubber.

The cylindrical clamp portion 2 of the hose fixing device 1 that is placed over the hose 12 expands and contracts in diameter due to contact friction when the hose 12 is pulled in the direction in which it is removed from the pipe 11, so a predetermined fixing strength can be provided to the connection between the pipe 11 and the hose 12 without the need for an elastic member such as a tension spring 3.

The invention described in the above embodiments is not limited to those embodiments, and various modifications can be made in the implementation stage without departing from the gist of the invention. Furthermore, each of the above embodiments includes inventions at various stages, and various inventions can be extracted by appropriate combinations of the disclosed constituent elements.
For example, if some of the constituent elements shown in each form are deleted, and the stated problem can be solved and the stated effect can be obtained, the configuration from which these constituent elements are deleted can be extracted as an invention.

1... Hose fixing device 2... Cylindrical clamp portion 3... Tension spring 4... Hook portion 5... Wire 6... Band-shaped body 7... Wire 8... Ring-shaped portion 10... Radiator 11... Pipe 12... Radiator hose (hose)
13... Bulge portion d0, d1, d2... Inner diameter F1, F2... Compressive load X... Central axis

Claims (6)

A hose fixing device for fixing a connection between a pipe and a hose,
a mesh tube body that is disposed so as to cover the connecting portion, has an inner diameter smaller than an outer diameter of the hose in an initial state, contracts in diameter when extended in a longitudinal axial direction, and expands in inner diameter to be larger than the outer diameter of the hose when compressed in the longitudinal axial direction;
an elastic member that stretches the mesh tube body in the longitudinal axis direction;
a hooked portion provided on the hose and onto which the hook portion of the stretched elastic member is hooked;
A hose fixing device comprising: 2. The hose fixing device according to claim 1 , wherein the hooked portion is a ring-shaped portion for engaging the hook portion . The hose fixing device according to claim 1 or 2, characterized in that the mesh tube body is formed by weaving wire into a cylindrical shape. The hose fixing device according to claim 1 or 2, characterized in that the mesh tube body is formed by weaving a strip into a cylindrical shape. 5. A hose fastener according to claim 1, further comprising a plurality of the elastic members, each of said elastic members having one end fixed to a point-symmetrical position of the braided tube body with respect to a central axis which is the longitudinal axis of the braided tube body. 6. The hose fixing device according to claim 1, wherein the mesh tube body fixes the connection between the pipe of a radiator provided in an engine room of an automobile and a radiator hose of the hose.

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