JPH11294668A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect a pipe without rotating the pipe and decrease a gap between connecting members, by operating a hooking element in the long axis of the pipe. SOLUTION: In this pipe joint, a projection 22 is provided on the outer surface of an end of a pipe 2 connected with a connecting member 1 having a hole 11, an energizing member 3 engaging with this projection 22 is put in the condition that the pipe 2 is urged to the connecting member 1, and a hooking element 4 for engaging the pipe 2 with the connecting member 1 is hooked with the connecting member 1. Thus, the pipe 2 can be connected without being rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint used for joining pipes for supplying and discharging pressure oil in, for example, various hydraulic circuits.

[0002]

2. Description of the Related Art In various hydraulic drive devices widely used in many industrial fields in order to perform a predetermined operation by the operation of a hydraulic actuator, supply and discharge of hydraulic oil to and from the hydraulic actuator are performed. A tube is adopted.

In a steering apparatus for an automobile, a rotation operation of a steering wheel for steering is converted into a linear movement by, for example, a rack and pinion mechanism as shown in FIG. 5, and this linear movement is interlocked with a piston of a hydraulic cylinder 100. Further, supply / discharge ports 102 and 102 of a hydraulic control valve interposed in the middle of a rudder shaft 101 connected to the steering wheel and the hydraulic cylinder 10
0 supply / discharge ports 103, 103
04, 104, the hydraulic pressure delivered from the hydraulic control valve to the supply / discharge ports 102, 102 is supplied to the hydraulic cylinder 100 via the pipes 104, 104, and the hydraulic pressure generated in response to this supply is transmitted to the rack and pinion. In addition to the mechanism, steering is assisted.

The supply / discharge ports 102, 1 of the hydraulic control valve and the like
As shown in FIG. 6, the pipe joint for connecting the pipe 104 to the pipe 02 is provided with a screw hole 105 in the supply / discharge port 102, and the pipe 104 having a male screw 106 at the end is screwed into the screw hole 105. ing.

[0005]

However, in a pipe joint in which the pipe 104 is screwed into the screw hole 105 as in the conventional example, the screw hole 105 is rotated while the pipe 104 is rotated.
This tube 104 needs to be inserted into the screw hole 10.
5 is easy to incline with respect to the center of
5, it is necessary to rotate the pipe 104 by the number of times corresponding to the thread of the external thread 106, and there is a problem that the joining workability of the pipe 104 is poor as a whole.

Since the pipe 104 is tightened by using a tool such as a spanner, another supply / discharge port 102 is provided near one supply / discharge port 102 like the hydraulic control valve. In such a case, the supply / discharge port 10
It is necessary to increase the interval between the joints 2 and 102, in other words, the interval between the joints, to be greater than the interval at which the pipe 104 can be tightened by the tool.

The present invention has been made in view of such circumstances, and has a projection provided on an outer surface of an end portion of a pipe, and a biasing member engaging with the projection is biased to the pipe by the joint member. The pipe is spliced without rotating the pipe by operating the locking body in the axial direction of the pipe by hooking the hook to the pipe to join the pipe to the connecting member. It is another object of the present invention to provide a pipe joint capable of reducing the distance between joints.

[0008]

According to a first aspect of the present invention, there is provided a pipe joint comprising a connecting member having a hole, and an end of the pipe communicating with the hole being joined to an outer surface of the end of the pipe. Is provided with a projection, and a latching body that joins the tube to the joining member in a state where the urging member that engages with the projection is urged to the joining member is attached to the joining member. It is characterized by being hung.

According to the first aspect of the invention, the pipe is rotated by a simple operation in which the urging member is urged to the connecting member while the pipe is urged to the connecting member. Since it can be joined to the joining member without joining, pipe joining workability can be improved. In addition, since the pipes can be joined without rotating, the interval between the joints can be reduced, and the degree of freedom in layout can be increased.

[0010] In a pipe joint according to a second aspect of the present invention, the latching body is
It is made of a flexible material, and is formed in a cylindrical shape having a hook portion, and an engaging portion for engaging with the hook portion is provided on an outer surface of the joining member.

In the second invention, the hook is pressed in the axial direction in a state where the hook is in contact with the outer surface of the joining member, so that the hook is bent while bending the hook. Since the portion can be engaged with the engaging portion, the latch body can be prevented from being accidentally moved, and the joint state of the pipes can be maintained well even when vibration is applied to the pipes. Can be.

In a pipe joint according to a third aspect of the present invention, a guide groove extending in an axial direction from an end face of the joint member and a hook groove continuing to an end of the guide groove are provided on an outer surface of the joint member. A hook portion fitted into the hook groove along the hook member is provided on the hook body.

[0013] In the third invention, the engaging portion of the engaging member is
Since the hook can be fitted into the hook groove along the guide groove of the joining member, even when the hook is formed of a non-flexible and highly rigid material, the hook is attached to the joining member, and thus the pipe is attached. Can be easily joined to the joining member, and the joined state of the pipes can be maintained well.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 1 is an enlarged sectional view of a pipe joint according to the present invention, and FIG. 2 is an exploded perspective view.

The pipe joint shown in FIG. 1 has a hole 21 communicating with the hole 11 in the hole 11 of the connecting member 1 such as a hydraulic actuator having a hole 11 through which hydraulic oil flows. The end of the tube 2 having the annular protrusions 22 is inserted into the outer surface of the tube 2 and the outer periphery of the end of the tube 2 is engaged with the protrusions 22 to urge the tube 2 to one side in the axial direction. A biasing member 3 using a coil spring is fitted, and the pipe 2 is connected to the joining member 1.
There is provided a cylindrical hook 4 which is urged to the hook to hook on the joining member 1.

At the opening of the hole 11 of the joint member 1, an insertion portion 12 having an inner diameter larger than the inner diameter of the hole 11 is provided by flaring, and a boundary portion between the insertion portion 12 and the hole 11 is formed as a pipe. 2 is a restricting portion 13 for restricting movement to one side in the axial direction. On the outer surface of the joining member 1, a plurality of concave engaging portions 14, 14 engaging with the convex engaging portions 41, 41 provided on the engaging body 4 are provided at predetermined intervals in the circumferential direction. Is provided.

The tube 2 is made of a metal tube.
The holding portion 23 of the sealing ring 5 having the elasticity by flaring the end portion is provided.

An annular spring receiving portion 42 extending inward in the radial direction is provided at one end of the hooking member 4, and the other end of the engaging member 4 projects inwardly from the inner surface to engage with each of the joining members 1. Two engaging portions 41, 41 that engage with the joining portions 14, 14 are provided at predetermined intervals in the circumferential direction.

The hook 4 is made of a synthetic resin material to have flexibility. When the hooks 41 are engaged with the engaging portions 14, the hooks 4 are used. Can be forcibly bent. The dimension between the spring receiving portion 42 and the latching portions 41 of the latching body 4 is reduced by compressing the urging member 3 from the spring receiving portion 42 side.
Is made long enough to be able to compress the urging member 3 by the entire amount when it is engaged with the engaging portions 14, 14.

The pipe joint constructed as described above has a holding portion 23
Sealing ring 5 having elasticity such as O-ring, flat packing, etc.
Is held, and the end of the tube 2 in which the urging member 3 and the hook 4 are inserted around the outer periphery is fitted into the insertion portion 12 of the joining member 1 so that the projection 22 comes into contact with the restriction portion 13. The movement of the pipe 2 to one side in the axial length direction is restricted, and the sealing ring 5 comes into contact with the inner surface of the hole 11 of the connecting member 1 so that the space between the connecting member 1 and the pipe 2 is well sealed. Oil leakage can be prevented well.

In the state where the hooks 41 of the hook 4 are in contact with the outer surface of the insertion portion 12 of the joining member 1, the hook 4
Can be forcibly moved in the axial direction, whereby the hooks 41 can be engaged with the engaging portions 14 of the joining member 1 while the hooks 4 are being bent. Member 3
Can be joined to the joining member 1 with the tube 2 being urged toward the joining member 1. As a result, the elastic restoration is limited in a state where the urging member 3 is compressed by the entire amount, so that the movement of the pipe 2 with respect to the joining member 1 can be suppressed.

Further, since the pipe 2 is urged by the urging member 3 and is joined to the joining member 1 without using a tool such as a wrench without screwing, one supply / discharge port as shown in FIG. In the case where another supply / discharge port 102 is provided in the vicinity of 102, the distance between the supply / discharge ports 102, 102, in other words, the distance between the joints is made smaller than that of the screw-in configuration as shown in FIG. And the degree of freedom in layout can be increased.

When removing the pipe 2 from the connecting member 1,
The hook body 4 is easily removed by disengaging the hooks 41 of the hook body 4 from the engaging portions 14 and moving the hook body 4 to the other side in the axial direction. Can be.

FIG. 3 is an exploded perspective view of the second embodiment, and FIG. 4 is an explanatory diagram showing a hooking state of the hook 4 when the pipe 2 is joined to the joining member 1. In the second embodiment, the engaging portions 14, 14 of the joining member 1 are connected to the guide grooves 14 a, which extend in the axial direction from the open end surface of the hole 11 of the joining member 1.
14a and the hook groove 1 following the end of the guide grooves 14a, 14a
4b and 14b. The other components and operations are the same as those of the first embodiment shown in FIGS. 1 and 2, and the same reference numerals are given to the common parts. , Detailed description and operation thereof will be omitted.

In the second embodiment, the engaging portions 41, 41 of the engaging member 4 are connected to the guide grooves 14a, 14a of the joining member 1.
After being inserted in the guide grooves 14a, 14a, the hooks 41, 41 can be fitted into the hooks 14b, 14b by turning the guide grooves 14a, 14a in the circumferential direction at the ends of the guide grooves 14a, 14a. Therefore, the hook 4 can be easily hooked on the joining member 1, and the hook 4 can easily join the pipe 2 with the joining member 1.

In the above embodiment, a coil spring is used as the biasing member 3. However, an elastic body such as a disc spring or rubber may be used.

Further, the insertion portion 12 and the restriction portion 13 are provided in the hole 11 of the joining member 1 so as to restrict the movement of the pipe 2 to one side in the axial length direction.
Alternatively, the end of the joining member 1 may be used as the limiting portion, and the projection 22 of the tube 2 may be brought into contact with the limiting portion.

The urging member 3 is brought into direct contact with the protrusion 22 of the tube 2 to urge the tube 2 to one side in the axial direction, and a spring receiver such as a retaining ring is provided separately from the protrusion 22. The urging member 3 may be provided on the tube 2 to abut the spring receiver.

Also, as in the second embodiment, the guide grooves 14
a, 14a and engaging portion 1 having hook grooves 14b, 14b
Instead of 4 and 14, a split groove is provided in the vicinity of the hooks 41 and 41 of the hook 4 of the first embodiment shown in FIGS. 1 and 2, and the hooks 41 and 41 are bent. As a result, FIG.
The engaging portion 41 may be engaged with the engaging portion 14 shown in FIG.

[0030]

As described in detail above, according to the first aspect,
Since the urging member can be joined to the joining member without rotating the pipe by a simple operation of merely urging the hook to the joining member with the pipe being urged to the joining member, Pipe joining workability can be improved. In addition, since the pipes can be joined without rotating, the interval between the joints can be reduced, and the degree of freedom in layout can be increased.

According to the second aspect, the hook is pressed in the axial direction in a state where the hook is in contact with the outer surface of the joining member, so that the hook is bent while the hook is being bent. Can be engaged with the engagement portion, so that the latch body can be prevented from being accidentally moved, and the joint state of the pipes can be maintained well even when vibrations act on the pipes. it can.

According to the third aspect of the present invention, the engaging portion of the engaging member can be fitted into the hook groove along the guide groove of the connecting member. In this case, the hook can be easily attached to the joining member, and further, the pipe can be easily joined to the joining member, and the joined state of the pipe can be maintained well.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a pipe joint according to the present invention.

FIG. 2 is an exploded perspective view of the pipe joint according to the present invention.

FIG. 3 is an exploded perspective view showing another embodiment of the pipe joint according to the present invention.

FIG. 4 is an explanatory diagram showing a hooking state of a hook when the pipe of the embodiment of FIG. 3 is joined to a joining member.

FIG. 5 is an explanatory view showing a state in which the pipe joint is mounted on a steering device for an automobile.

FIG. 6 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint member 11 Hole 14 Engagement part 2 Pipe 22 Projection 3 Urging member 4 Hook 41 Hook part 14a Guide groove 14b Hook groove

Claims (3)

[Claims] 1. A pipe joint in which a connecting member having a hole is joined to an end of a tube communicating with the hole, a protrusion is provided on an outer surface of the end of the tube, and the protrusion is engaged with the protrusion. A pipe joint, wherein a latching body that joins the pipe to the joining member with the urging member being biased to the joining member is hooked to the joining member. 2. The engaging member is made of a flexible material, and is formed in a cylindrical shape having an engaging portion. The pipe joint according to claim 1, which is provided on an outer surface. 3. A guide groove extending in an axial direction from an end surface of the joint member and a hook groove continuing to an end of the guide groove are provided on an outer surface of the joint member, and the hook groove extends along the guide groove. The pipe joint according to claim 1, wherein a hook portion to be fitted is provided on the hook body.