JPH11248061A - Hose joint structure - Google Patents

Abstract

(57) [Problem] To provide a hose joint structure capable of easily connecting a hose holder holding a hose to a main body side of an apparatus with one touch and reducing the number of parts. SOLUTION: A hose joint structure 1 is composed of a hose holder 2 for holding a hose 8 and a nut-like member 3 loosely inserted while being restrained from moving in an axial direction by a protrusion 5. The threaded portion 11 of the nut-shaped member 3 is brought into contact with the tapered seating surface 18 of the
The tapered portion 9 is pressed against the tapered seating surface 18 by being screwed onto and tightened. As described above, the taper joint structure 1 is attached to the main body side 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose joint structure for connecting an oil-pneumatic hose to an insertion main body, and more particularly to a hose joint structure which can be mounted extremely easily and can reduce the number of parts. About.

[0002]

2. Description of the Related Art There are an extremely large number of known techniques for hose fittings. These known techniques have their respective characteristics and their respective structures are different from each other.
Most use adapters as shown in
Other than the above, at least there is no disclosure of one that attaches a hose by a one-touch operation as in the present invention whose detailed structure will be described later.

[0003] As shown in FIG.
a comprises a hose holder 20, a nut-shaped member 21, an adapter 22, and the like. The main body side 23 of the device to which the hose joint structure 1a is attached is formed with a tapered screw hole 24 at the open end of the medium passage 17. The hose holder 20 includes a hose holder 25 for holding the hose 8, and a protrusion 26 projecting in a direction opposite to the hose 8 side of the hose holder 25, and a taper 27 in the protrusion direction of the protrusion 26. It is formed. A through hole 28 communicating with the inside of the hose 8 is formed inside the hose holder 20.

The nut-like member 21 is inserted into the projecting portion 21 of the hose holder 20 while being restricted from moving in the axial direction, and has a screw hole 29 formed therein. Meanwhile, adapter 2
Numeral 2 has a nut-shaped portion 30 formed at the center and a tapered screw portion 31 and a screw portion 32 protrudingly formed on both sides thereof. Further, a medium passage 33 is formed inside, and a tapered seat surface 34 is formed at one end. In addition, the tapered screw portion 31
Is screwed into the tapered screw hole 24 of the main body side 23, and the screw portion 32 is screwed into the screw hole 29 of the nut-shaped member 21.

As shown in FIG. 5, the hose joint structure 1a is connected to the main body 23 in the following procedure. First, the tapered screw portion 31 of the adapter 22 is screwed into the tapered screw hole 24 of the main body 23, and the adapter 22 is fixed to the main body 23.
Separately, the nut-shaped member 21 is previously engaged with the projecting portion 26 of the hose holder 20 in a state where the movement in the axial direction is restricted,
The combined hose holder 20 and nut-like member 21
Is engaged with the adapter 22. That is, the hose holder 2
The tapered portion 27 of the zero projecting portion 26 is arranged at a position facing the tapered seat surface 34 of the adapter 22, and the screw hole 29 of the nut-shaped member 21 is screwed into the screw portion 32 of the adapter 22 for fastening. As a result, the hose holder 20 is drawn into the adapter 22 side, and the tapered portion 29
The second tapered seat surface 34 is pressed against the second tapered seat surface 34. As described above, the hose holder 20 is fixed to the main body side 23 via the adapter 22, and the hose is connected.

[0006]

FIG. 5 explains in detail the conventional method of attaching the hose joint structure 1a to the main body side 23. In the prior art, however, the hose holder 20 must be connected to the main body side 23 without the adapter 22. It consists of a structure that cannot be mounted on a vehicle. Therefore, at least the adapter 2
2 and mounting of the hose holder 20 are required, and the assembling work takes time.
The adapter 22 has a tapered screw portion 31 and a screw portion 32 formed on both sides of the central nut-shaped portion 30 and has a certain axial length. Therefore, the main body side 23
Depending on the shape, the hose holder 20 may be difficult to attach to the adapter 22. Further, adapters 22 of various dimensions that can be attached to the screw holes 24 of various sizes on the main body side 23 are required, and it is difficult to manage the parts, and the cost of the adapter 22 is at least increased. .

An object of the present invention is to solve the above-mentioned problems and to provide a hose joint structure capable of facilitating an assembling operation, reducing the number of parts and reducing costs.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a hose joint structure for screwing a hose side into a threaded hole on a main body side, wherein the main body side has an open end. A tapered seating surface is formed at a peripheral edge of a medium passage opening at a screw hole and a bottom surface of the screw, and the hose joint structure includes a hose holder and a nut-like member. And a protruding portion projecting from the hose retaining portion and forming a tapered portion that abuts and engages with the tapered seat surface at the protruding end thereof. The nut-shaped member is provided on the outer periphery of the protruding portion. A hose joint structure comprising a screw portion which is inserted and screwed into the screw hole while being restricted from moving in the axial direction, and a through-hole through which a medium flows is formed inside the hose holding portion and the projecting portion. Constitutes More specifically, the hose holding part or the protruding part of the hose holding tool is provided with a locking part with which a fastening tool can be engaged.

In the present invention, an adapter is not used unlike the prior art. A hose joint structure composed of a hose holder and a nut-like member, which have been assembled in advance, is engaged with a screw hole on the main body side to which the hose needs to be connected. The tapered portion of the hose holder is brought into contact with the tapered seat surface of the main body while screwing the nut-shaped member to the main body, and the connection of the hose joint structure to the main body is completed by fastening the nut-shaped member. As described above, the connection of the hose to the main body is performed by a very simple one-touch operation.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the hose joint structure of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1, 2, and 3, the hose joint structure 1 of the present invention includes a hose holder 2 and a nut-like member 3, which are integrally connected to each other.

As shown in FIGS. 1 and 2, the hose holder 2 comprises a hose holder 4 and a protruding portion 5, and a nut-shaped portion 6 is formed at an intermediate portion between them. The hose holding part 4 and the protruding part 5 have an integral structure, and a through-hole 7 of a medium passage through which a medium (oil or air) passes is formed therein. A hose 8 is fixed to the hose holder 2 via a caulking means (not shown). A tapered portion 9 is formed at the tip of the protruding portion 5. An engaging groove 10 is formed in the vicinity of the nut-shaped member 6 of the protruding portion 5.

The nut-shaped member 3 has an inner hole which can be loosely inserted into the outer diameter of the projecting portion 5 of the hose holder 2, and has a screw portion 11 and a nut-shaped portion 12 which is one of the locking portions on the outer peripheral side. Are formed. On the side opposite to the screw portion 11, a locking portion 13 that can be engaged with the locking groove 10 of the protruding portion 5 is formed.
The nut-shaped member 3 having the above structure is loosely inserted into the projecting portion 5 of the hose holder 2, and is assembled integrally with the hose holder 2 in a state where the locking portion 13 is engaged with the locking groove 10. .

The main body side 14 of the apparatus to which the hose joint structure 1 of the present invention is attached has the structure shown in FIG. A screw hole 15 is formed at the opening end of the main body 14. A medium passage 17 through which a medium passes is opened and connected to a screw bottom surface 16 of the screw hole 15. A tapered seat surface 18 is formed on the periphery of the opening of the medium passage 17.

Next, a method of attaching the hose joint structure 1 of the present invention to the main body side 14 will be described. The hose holder 2 and the tapered portion 9 side of the nut-shaped member 3 which have been assembled in advance are engaged with the main body side 14, and the screw portion 11 of the nut-shaped member 3 is screwed into the screw hole 15 of the main body side 14. Then, a fastening tool such as a wrench is engaged with the nut-shaped portion 12 of the nut-shaped member 3 to perform a screwing operation. Since the locking portion 13 of the nut-shaped portion 12 is engaged with the locking groove 10 of the protrusion 5,
When the nut-shaped member 3 is rotated, the entire hose joint structure 1 is brought into the main body side 14, and the tapered portion 9 of the protrusion 5 is pressed against the tapered seat surface 18 of the main body side 14. At this time, in order to restrain the hose holder 2 from rotating, it is desirable to engage a fastener such as a wrench on the nut-shaped portion 6 to prevent the hose holder 2 from rotating.

As described above, in the hose joint structure of the present invention, the nut-shaped member 3 is simply screwed to the main body side 14 and fastened to the main body side 14 of the hose joint structure 1 by a simple one-touch operation. Are performed in a very short time. Further, since the adapter 22 used in the prior art is not used, the hose joint structure 1 can be relatively easily mounted regardless of the shape of the main body side 14.

[0016]

1) According to the hose joint structure according to the first aspect of the present invention, the hose holder can be directly attached without interposing an adapter unlike the prior art, and the assembling work time can be reduced. In addition, the hose joint structure can be relatively easily mounted regardless of the shape of the main body.
In addition, the cost is reduced by the absence of the adapter, and the parts management can be facilitated. 2) According to the hose joint structure according to the second aspect of the present invention, the hose joint structure is formed with a locking portion that can prevent twisting at the time of assembling, and a hose is provided by fastening a fastener to this. The holder and the like are attached to the main body side without rotating, so that the attachment can be reliably performed.

[Brief description of the drawings]

FIG. 1 is an axial sectional view showing a structure for attaching a hose joint structure of the present invention to a main body side.

FIG. 2 is an axial sectional view showing a structure of a hose holder having a hose joint structure according to the present invention.

FIG. 3 is an axial sectional view showing a structure of a nut-shaped member of the hose joint structure of the present invention.

FIG. 4 is a partial cross-sectional view showing a structure on a main body side to which the hose joint structure of the present invention is attached.

FIG. 5 is an axial sectional view showing an example of a conventional hose joint structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hose joint structure 2 Hose holder 3 Nut member 4 Hose holding part 5 Projection part 6 Nut shape part 7 Through hole 8 Hose 9 Taper part 10 Lock groove 11 Screw part 12 Nut shape part 13 Lock part 14 Body side 15 Screw hole 16 Screw bottom 17 Medium passage 18 Taper seat

Claims (2)

[Claims] 1. A hose joint structure for screwing a hose side into a screw hole on a main body side, wherein the main body side has a screw hole at an open end and a tapered peripheral portion of a medium passage opening at the screw bottom surface. The hose joint structure comprises a hose holder and a nut-like member, and the hose holder has a hose holding portion for holding a hose and a projecting end protruding from the hose holding portion. A projection that forms a tapered portion that abuts and engages the tapered seating surface. The nut-shaped member is inserted into the outer periphery of the projection while being restrained from moving in the axial direction, and screwed into the screw hole. And a through hole through which a medium flows is formed inside the hose holding portion and the protruding portion. 2. The hose joint structure according to claim 1, wherein the hose holding portion or the projecting portion of the hose holding tool has a locking portion to which a fastening tool can be engaged.