JPH057700U - Lubricator pipe fittings - Google Patents

Abstract

(57) [Summary] [Structure] The first connecting portion 2 connected to the main body 31 side, and the second connecting portion 3 detachably connected to the first connecting portion 2,
The connecting portions 2 and 3 are connected in a relaxed state by a wire 28 that cuts with a force smaller than the separating force. [Effect] When the refueling hose 8 connected to the second connecting portion 3 is pulled and the second connecting portion 3 is separated from the first connecting portion 2, immediately after that, the wire 28 is tensioned and broken, and
The jump of the connecting portion 3 is prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint which can be suitably implemented for connecting a pipe body such as a rubber refueling hose to a refueling device main body installed in, for example, a gas station.

[0002]

[Prior Art]

 A typical prior art is disclosed, for example, in Japanese Patent Laid-Open No. 2-180200. In this prior art, the extension of the hose, which is a pipe body due to the pulling force, is suppressed to a slight amount by the piano wire, which is a cord, and the extended hose contracts even if the pipe joint is separated, so that the refueling hose jumps. It is configured to prevent climbing.

[0003]

[Problems to be solved by the device]

 In such a prior art, the refueling hose does not extend even if the refueling hose is pulled unnecessarily with a large force, and the jump due to the separation of the pipe joint is prevented, but the following inconveniences occur during normal use. That is, (a) When the piano wire is installed in the oil passage of the refueling hose and both ends are fixed only at both ends of the hose, the inner surface of the hose is rubbed by the piano wire and damaged, resulting in an oil leak accident. Cause of.

(B) When the piano wire is installed in thick rubber, the rubber part surrounding and fixing the piano wire is damaged by repeated bending, and the life is shortened.

Therefore, an object of the present invention is to prevent the pipe joint from jumping up together with the pipe body even when a large tensile force acts on the pipe body such as an oil supply hose to separate the pipe joint from each other. It is an object of the present invention to provide a pipe joint for an oil supply device capable of improving safety without affecting the life of the hose.

[0006]

Means for Solving the Problems The present invention provides a refueling device main body, a first connecting portion fixedly connected to the main body and supplied with fuel oil from the main body, and detachably connected to the first connecting portion. A second connecting portion, a means for locking the first connecting portion and the second connecting portion, and limiting the mutual separation of the first and second connecting portions; Both ends of the pipe body are connected to the flexible and elastic pipe body and the first and second connection portions connected to each other in a relaxed state. And a cord that breaks or separates with a force smaller than the force of separating them from each other.

[0007]

[Action]

 According to the present invention, a rope is locked to the first and second connecting portions. In this state, the cord is in a relaxed state, and when the connecting portions are separated, they break or separate with a force smaller than the force of separating them from each other, so that the pipe body is pulled with a large force and the first After the second and second connecting parts are separated, the cord is tensioned by the respective connecting members and either ruptures or pulls out from the first and second connecting parts and separates. At this time, the tube body tries to contract by the elastic recovery force by the length extended by the tensile force, but the restoring energy is absorbed by the breakage or detachment of the cord, which causes the tube body to be undesired. It is possible to prevent the first connection part and the second connection part from scattering together with the pipe body without applying any force, and thus without damaging the pipe body, and improve the safety. Can be planned.

Further, since the first and second connecting portions are provided with means for limiting mutual separation, when the first connecting portion and the second connecting portion are separated from each other, the first and second connecting portions are provided immediately before the cord is broken. Further, the separation displacement of the second connecting portion is limited, and thus the jumping up of the second connecting portion can be prevented even when a relatively small tensile force that does not break the rope is applied.

[0009]

Embodiment FIG. 1 is a partially cutaway sectional view of an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the embodiment shown in FIG. The pipe joint 1 provided in the oil supply device basically has a first connecting portion 2 and a second connecting portion 3 which is detachably connected to the first connecting portion 2. These first and second connecting portions 2 and 3 are connected in a relaxed state by a wire 28 which is a cord as described later, and are covered by a cover 40. The first connecting portion 2 has a joint fitting 5 to which an oil supply hose 4 extending from the main body of the oil supply device is connected, and a first connecting member 6 to which the joint fitting 5 is screwed in a liquid-tight manner. The second connecting portion 3 includes a second connecting member 7 that is liquid-tightly connected to the first connecting member 6 and an oil supply hose 9 that is a liquid-tight screw-fastened to the second connecting member 7 and that is a pipe body. It has the joint metal fitting 8 connected.

The joint fitting 5 has an oil passage 10 in the shape of a right circular cylinder which communicates with an oil passage of the fuel supply hose 4 through which the fuel oil passes, and the oil passage 10 includes the joint fitting 5 and the first connecting member 6 Is connected to the valve chamber 11 formed in the first connecting member 6. The fitting 5 includes a engaging portion 12 to which a tightening tool such as a wrench is engaged when being attached to and detached from the first connecting member 6, and a screw having a smaller diameter than the engaging portion 12 and an external thread being engraved on the outer peripheral surface. And a joint section 13. The screwing portion 13 is screwed into a screw hole 14 formed at one axial end of the first connecting member 6. An annular sealing material 16 provided on the joint fitting 5 is in contact with the end surface 15 of the first connecting member 6 in the vicinity of the screw hole 14 and perpendicular to the axis over the entire circumference in the circumferential direction, and the joint fitting 5 and the first connecting member are connected. Liquid tightness with 6 is achieved. Such a joint fitting 5 has the same structure as the other joint fitting 8.

A safety valve 17 is provided in the valve chamber 11 of the first connecting member 6. The valve body 18 of the safety valve 17 is formed with a plurality of guide pieces 20 slidably fitted along a valve hole 19 having an inner diameter slightly larger than the inner diameter of the oil passage 10. The valve body 18 is elastically biased by the compression coil spring 21 in the direction of approaching the valve seat 22, and the radius of the valve body 18 from the inner peripheral surface of the second connecting member 7 connected to the first connecting member 6 is increased. The valve is opened by abutting on the protrusion 23 protruding inward in the direction. The inner peripheral surface 24 of the protrusion 23 has an inner diameter smaller than the inner diameter of the valve hole 19. The connecting members 6 and 7 are connected in a liquid-tight state with the annular seal member 25 sandwiched therebetween, and the pins 26 and 27 inserted in the diametrical direction prevent mutual rotation and withdrawal around the axis. These pins 26 and 27 are, for example, made of aluminum or synthetic resin, or like roll pins, and are broken when a large force acts in the direction in which the connecting members 6 and 7 separate, and the first and second pins 26 and 27 are broken. It is configured so that a large force is not transmitted between the two connecting portions 2 and 3.

A wire 28, which is a cord, is provided between the first and second connecting members 6 and 7 in such a state that the wire 28 is loosely spirally wound, that is, in a relaxed state. Both ends 29a, 29b of the wire 28 are fixed to the locking pieces 30a, 30b by so-called crimping, and these locking pieces 30a, 30b are formed on the first and second connecting members 6, 7 respectively. The connection members 6 and 7 are locked by machine screws 32a and 32b screwed into the screw holes 31a and 31b.

FIG. 3 is a front view showing an oil supply device 35 including the pipe joint 1. A refueling device 35 provided at a refueling station or the like has a refueling hose 4 in which one end of the refueling hose 4 is connected to a curved pipe 38 protruding outward from one side of a refueling device main body 37 standing on a roadbed 36. The other end of the oil supply hose 4 is connected to the other oil supply hose 9 by the pipe joint 1, and a nozzle 39 is connected to the tip of this oil supply hose 9. When the vehicle 41 is refueled, the operating lever 45 of the nozzle 39 is operated while the discharge pipe 42 of the nozzle 39 is inserted into the fueling port 44 of the vehicle 41 as shown by the phantom line 43 in FIG. It is possible to supply fuel oil such as gasoline pumped up by a pump (not shown) built in the main body 37.

During such refueling, the vehicle 41 is accidentally started in a direction away from the main body 37 with the discharge pipe 42 of the nozzle 39 being inserted into the refueling port 44, as indicated by arrow A. In this case, the refueling hose 9 will be pulled with a large force of, for example, about 200 kgf or more. Then, the refueling hose 9 which is generally flexible and has elasticity and is made of, for example, synthetic rubber extends, and at the moment when the connecting members 6 and 7 are separated, the elastic recovery force of the refueling hose 9 tries to jump up. By the wire 28, the displacement of the second connecting member 7 which is separated from the first connecting member 6 and tries to jump up can be restrained.

That is, as shown in FIG. 4, immediately after the second connecting member 7 is separated from the first connecting member 6, the pins 26 and 27 are broken, and the wire 28 is slightly extended. The valve body 18, which is elastically pressed by the coil spring 21, releases the state in which the tip end portion of the guide piece 20 1 is restrained by the protrusion 23 of the second connecting member 7, and thereby the spring of the compression coil spring 21 1. The force causes the valve element 28 to project from the valve hole 19 and the valve element 28 to be seated on the valve seat 22. Therefore, the fuel oil pumped by the pump of the main body 37 is cut off, and when the connecting members 6 and 7 are separated, the leakage of the fuel oil is stopped almost at the same time.

Further, when the second connecting member 7 is separated from the first connecting member 6 by the displacement of the automobile 41 in the arrow A direction, the wire 28 is completely extended and broken as shown in FIG. The wire 28 is made of a material that can be broken by a tensile force of about 30 to 50 kgf, for example, a synthetic resin containing glass fiber. Due to the breakage of the wire 28, the elastic recovery force of the oil supply hose 9 in the extended state cancels out the kinetic energy that tends to jump up, thereby preventing jumping up.

FIG. 6 shows another embodiment, so that when the wire 28 is pulled, the wire 28 itself is not broken, but the locking pin 132 for fastening the wire 28 to the second connecting member 7 is released. And functions as a separation limiting means. In this case as well, the locking pin 132 is set to be released with a smaller pulling force than the pipe joint 1 is separated. As described above, the elastic recovery force of the fuel supply hose 9 can be absorbed by withdrawing the locking pin 132 from the recessed hole 131 before the wire 28 breaks, and thus the safety can be further improved.

In the embodiment shown in FIGS. 1 to 5 described above, the wire 28 as a cord is made of synthetic resin containing glass fiber, but other materials such as a string made of plant fiber, aluminum, etc. It may be a thin wire made of metal. Further, in the embodiment shown in FIG. 6, the locking pin 132 may be adhered with an adhesive agent with an adhesive force sufficient to prevent the engaging pin 132 from falling out from the concave hole 131.

As a further embodiment of the present invention, as shown in FIG. 7, both ends of the wire 28 are indicated by reference numerals 28a and 28b on the first and second connecting members 6 and 7, respectively. It may be welded to and locked.

[0020]

[Effect of the device]

 According to the present invention, since both ends of the cord are loosely locked to the first and second connecting portions, respectively, when the connecting portions are separated by a large force, the second connecting portion is tubular. It is possible to prevent the vehicle from jumping up with it, and it is possible to significantly improve the safety without affecting the life of the refueling hose.

Further, since the first and second connecting portions are provided with means for limiting mutual separation, when the first connecting portion and the second connecting portion are separated from each other, the first connecting portion and the first connecting portion are immediately before being broken. Also, the separation displacement of the second connecting portion is limited, and thus the second connecting portion can be prevented from jumping up even if a small pulling force that does not divide the rope is applied.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of an embodiment of the present invention.

2 is an exploded perspective view of the pipe joint 1 shown in FIG. 1. FIG.

FIG. 3 is an overall front view of an oil supply device 35 including the pipe joint 1.

FIG. 4 is a partially cutaway sectional view showing a state immediately after separation of the first and second connecting members 6 and 7.

FIG. 5 is a simplified front view showing a state where the first and second connection members 6 and 7 are separated and the wire 28 is fully extended.

FIG. 6 is a perspective view showing a locking pin 132 according to another embodiment of the present invention having a recessed hole 1;
It is a figure which shows the state extracted from 31.

FIG. 7 is a simplified front view of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe joint 2 1st connection part 3 2nd connection part 4,9 Oil supply hose 6 1st connection member 7 2nd connection member 28 Wire 32 Locking pin 35 Oil supply device

Claims (1)

[Claims for utility model registration] 1. A refueling device main body, a first connecting portion fixedly connected to the main body and supplied with fuel oil from the main body, and detachably connected to the first connecting portion. A second connecting portion, a means for locking the first connecting portion and the second connecting portion, and limiting mutual separation of the first and second connecting portions, and a fixed connection to the second connecting portion. The flexible and elastic pipe body and the first and second connecting portions connected to each other are respectively locked at both ends in a loose state, and each connecting portion resists the locking. And a cord that breaks or separates with a force smaller than the force that separates them from each other.