JP6402223B2 - Pin joint structure - Google Patents

Description

The present invention relates to a joint structure, and more particularly to a pin joint provided with a pin member.

As shown in FIG. 5, when the refrigerant is injected into the air cooling machine via the refrigerant pipe, a joint 6 is provided at the end of the refrigerant pipe 5 and screwed into the connection port 7 of the air cooling machine. A pin member 61 is provided therein, and a valve member 71 is provided at the connection port 7 ?. When the joint 6 is screwed in and joined to the connection port 7, the pin member 61 presses the valve member 71 so that the valve member 71 is opened, so that the refrigerant is exported from the high-pressure storage tank (for example, a cylinder) through the refrigerant pipe 5. And injected into the connection port 7.

After the work of filling the refrigerant is completed, the worker needs to remove the joint 6 of the refrigerant pipe 5 from the connection port 7 of the air cooling machine. Usually, an operator rotates and removes the joint 6 with a hand-held tool or bare hands, and the residual high-pressure refrigerant remains in the refrigerant pipe 5. There is a high possibility of injury by spraying. On the other hand, after the refrigerant pipe 5 is removed from the air cooling machine, the amount of refrigerant leaked is the volume of the entire refrigerant pipe 5, and the material is wasted because this amount is large.

  Taiwan Utility Model Publication M518748

An object of the present invention is to provide a pin joint structure, the pin member is extended by operation, and the pin member is controlled so as to be interlocked with the joint, so that connection and removal of the pipe line are convenient, Moreover, the risk of injury to the operator when removing the joint can be reduced.

FIG. 1 is a three-dimensional exploded view of a pin joint according to the present invention. FIG. 2 is a sectional view showing one embodiment of a pin joint according to the present invention. FIG. 3 is a cross-sectional view showing one embodiment of the pin joint according to the present invention. FIG. 4 is a sectional view showing one embodiment of a pin joint according to the present invention. FIG. 5 is a diagram showing a case where a joint structure of a known technique is used.

1 and 2 show a pin joint structure provided by the present invention. The pin joint structure includes a first connecting member 1, a second connecting member 2, and a pin member 3. The first connecting member 1 includes a head portion 11 and a body portion 12, the head portion 11 and the body portion 12 are connected, and the first passage 13 extends from the head portion 11 to the body portion 12. The first connecting member 1 is formed in a tubular shape through the first connecting member 1. The first passage 13 is provided with a connecting groove 14 at one end of the head 11, and the connecting groove 14 is provided with a first screw portion 141 connected to an external pipe line.

In addition to the above, the first passage 13 has different inner diameters in the head 11 and the body 12. In the head portion 11, a large diameter portion 131 having a large inner diameter is formed, and in the body portion 12, a small diameter portion 132 having a small inner diameter is formed, and a connecting portion between the large diameter portion 131 and the small diameter portion 132 is formed. Are formed with a stepped portion 133, and a second screw portion 134 is provided on the small diameter portion 132. A through hole 15 that penetrates to the small diameter portion 132 is provided on the outer surface of the body portion 12, and the stepped portion 133 is provided so as to be closer to the head 11 than the through hole 15.

The pin member 3 has a pressing rod 31, an operating portion 32 is provided at one end of the pressing rod 31, a pressing portion 33 is provided at the other end, and a third screw portion 311 is provided at the pressing rod 31. It is done. The pin member 3 is inserted into the first passage 13 by the pressing rod 31 and is screwed to the second screw portion 134 of the small diameter portion 132 so as to be movable by the third screw portion 311. The operation portion 32 is positioned outside the small diameter portion 132 and has a sufficiently safe distance from the connecting groove 14. The operation unit 32 has a size that is easy for an operator to grip, and is provided with a non-slip groove 321 on the outer periphery. The operator rotates the pin member 3 and is threaded in the first passage 13. Can be moved. A spacing member 17 is provided at one end of the body portion 12, the pressing rod 31 is movably provided, and corresponds to the operation portion 32. The spacing member 17 may be a washer or a roller bearing. Further, the operation portion 32 is provided with a concave groove 322 on the side facing the body portion 12.

Further, a convex edge portion 34 is provided at a portion of the pressing rod 31 that is extended to the large diameter portion 131, and can move in the large diameter portion 131 together with the pressing rod 31. Since the outer diameter of the convex edge portion 34 is larger than the inner diameter of the small diameter portion 132, the convex portion 34 abuts against the stepped portion 133 by the block of the stepped portion 133 and blocks the first passage 13.

The second connecting member 2 has a sleeve 21, the sleeve 21 surrounds a hollow chamber 211, a branch pipe 22 connected to an external pipe line is extended on one side of the sleeve 21, and the second connecting member 2 Forms a T-shape. The branch pipe 22 is provided with a second passage 23 that penetrates the hollow chamber 211.

In addition to the above, the inner diameter of the sleeve 21 is slightly larger than the outer diameter of the body portion 12, and the second connecting member 2 covers the outer periphery of the body portion 12 through the sleeve 21. In other words, the body 12 is inserted into the hollow chamber 211 of the sleeve 21, and its end extends from the hollow chamber 211, whereby the first connecting member 1 is pivoted with respect to the sleeve 21. Can roll. The hollow chamber 211 is sealed from both ends by a leakage preventing member 24. The leakage prevention member 24 is a rubber ring, and is provided between the sleeve 21 and the barrel portion 12, and the outer periphery of the barrel portion 12 or the inner side of the sleeve 21 so as to fit the leakage prevention member 24. An annular groove 16 is provided around the circumference. In the present embodiment, the annular groove 16 is provided on the outer periphery of the body portion 12.

According to the above-described structure, the present invention can be used for piping for carrying various types of pressure fluid, and examples thereof include air, oil, or a refrigerant. The actual use situation is shown in FIGS. When injecting the refrigerant into the air cooling machine, as shown in FIG. 2, first, the operation portion 32 is rotated, and the pin member 3 is moved to a position where it is stopped by the stepped portion 133 by the convex edge portion 34. The first passage 13 is reliably shut off by being pulled out and continuing to rotate. On the other hand, a pipe 41 for supplying the refrigerant is connected to the branch pipe 22 of the second connecting member 2. Then, the connecting groove 14 of the first connecting member 1 is screwed into the connecting port 42 of the air cooling machine. Before the connecting groove 14 firmly tightens the connection port 42, the pin member 3 is fastened to the second screw portion 134 of the first passage 13 by the third screw portion 311. Is an operation of rotating the operating portion 32, and the first connecting member 1 can be simultaneously rotated by the pressing rod 31, and the connecting groove 14 is screwed into the connecting port 42 as shown in FIG. . At this time, since the first connecting member 1 is inserted into the sleeve 21 of the second connecting member 2, even if the first connecting member 1 is arbitrarily rotated, the second connecting member 2 and the connection to the second connecting member 2 are connected. This does not affect the refrigerant pipe 41 to be used.

According to the above-described method, after the connection groove 14 and the connection port 42 are firmly tightened, the first connecting member 1 is fixed to the connection port 42, so that the rotation cannot be performed. If the operation part 32 is further rotated, the frictional resistance between the third screw part 311 and the second screw part 134 can be overcome, and the pin member 3 is unlocked, as shown in FIG. The first connecting member 1 can be rotated independently. As a result, the second screw portion 134 is removed to move the position, and the pressing portion 33 of the pin member 3 is inserted into the connecting groove 14 and presses the valve member 421 in the connection port 42. At this time, the convex edge portion 34 of the pin member 3 is separated from the stepped portion 133, the refrigerant pipe 41 is communicated with the first passage 13 through the second passage 23 and the through hole 15, and the refrigerant is passed through the above-described route. After that, it can be injected into an air cooling machine. On the other hand, when the pressing portion 33 of the pin member 3 is moved and inserted into the connecting groove 14 and pressed so as to open the valve member 421, the operation portion 32 is moved by the concave groove 322 and the trunk portion is moved. It is provided outside the one end of the portion 12 and is pressed against the spacing member 17.

After completing the work of filling the refrigerant, the worker removes the pin joint according to the present invention from the connection port according to the reverse procedure. Specifically, in the state shown in FIG. 4, the worker rotates the operation unit 32 in the opposite direction, and between the connection groove 14 of the first connection member 1 and the thread of the connection port 42. Since the frictional resistance is larger than the frictional resistance between the pressing rod 31 and the thread of the small diameter portion 132, the pin member 3 is rotated and inserted into the second threaded portion 134, and the pressing portion 33 is It leaves | separates from the valve member 421 in the connection port 42, and returns to the state shown in FIG. In the above-described process, the operation unit 32 presses the spacing member 17 and the spacing member 17 can be moved with respect to the body portion 12, and the frictional resistance between the two configurations is reduced. In this case, it is possible to avoid the operation portion 32 being interlocked by a large frictional resistance and rotating the first connecting member 1.

The operation portion 32 continues to rotate further, the convex edge portion 34 of the pin member 3 is pressed against the stepped portion 133, and the pressing rod 31 is firmly screwed to the second screw portion 134. At this time, the pin member 3 cannot rotate with respect to the first connecting member 1, and the first connecting member 1 is rotated in conjunction with the pin member 3 to leave the connection port 42 and return to the state shown in FIG. 2. . Thus, the connecting groove 14 is removed from the connection port 42.

According to the above description, in the process of attaching and removing the pin joint according to the present invention, the operator can complete all the steps of the operation by operating only the operation unit 32, and with respect to the head 11 with bare hands or hand-held tools. There is no need to attach or detach, and injuries due to sudden ejection of the high-pressure refrigerant remaining inside the pipe during removal can be avoided. Furthermore, if there is a certain safety distance between the operation portion 32 and the connecting groove 14, safety in the filling operation can be further ensured.

In addition, when the pin joint according to the present invention is to be removed after the operation of filling the refrigerant is completed, the valve member 421 at the connection port 42 is already closed as shown in FIG. Since the convex edge portion 34 of the pin member 3 is pressed against the stepped portion 133 to block the first passage 13, the residual refrigerant leaked into the pipe after being removed is in the large diameter portion 131. In addition to reducing the risk of injury to workers, the amount of leakage can be reduced and wasteful use of raw materials can be reduced.

First connecting member 1 Head 11
Body 12 First passage 13
Large diameter part 131 Small diameter part 132
Step part 133 Second screw part 134
Connecting groove 14 First screw part 141
Through hole 15 annular groove 16
Spacing member 17 Second connecting member 2
Sleeve 21 Hollow chamber 211
Branch pipe 22 Second passage 23
Leakage prevention member 24 Pin member 3
Pressing bar 31 Third screw portion 311
Operation unit 32 Non-slip groove 321
Concave groove 322 pressing part 33
Convex edge 34 Refrigerant piping 41
Connection port 42 Valve member 421
Refrigerant piping 5 Joint 6
Pin member 61 Connection port 7
Valve member 71

Claims (6)

A pin joint structure, wherein the pin joint structure includes a first connecting member, a pin member, and a second connecting member,
The first connecting member includes a head and a body, the first head is connected to the body, and a first passage penetrating from the head to the body is provided, and the first passage is provided. Is provided at one end of the head with a connecting groove connected to an external conduit, and the connecting groove is provided with a first threaded portion, and the first passage is provided with a stepped portion, A small-diameter portion is formed, a second screw portion is provided in the small-diameter portion, a through-hole penetrating to the small-diameter portion is provided in the trunk portion, and the stepped portion is closer to the head than the through-hole. Provided as
The pin member has a pressing rod to be inserted into the first passage, a third screw portion is provided at a portion corresponding to the small diameter portion of the pressing rod, and is screwed to the second screw portion, and the pin The member can move in the first passage by rotation, a convex edge portion is provided at a portion corresponding to the large diameter portion of the pressing rod, the convex edge portion can move together with the pressing rod, and the step portion Pressed, can block the first passage, the pressing rod is provided with an operating portion outside the first passage,
The second connecting member has a sleeve and a branch pipe connected to an external pipe line, the sleeve surrounds the hollow chamber, and the branch pipe is provided with a second passage penetrating to the hollow chamber, The sleeve covers the outer periphery of the body portion of the first connecting member and can pivot with respect to the body portion, and a leakage preventing member is provided between the sleeve and the body portion to seal the hollow chamber.
Pin joint structure characterized by that. The operation unit and the connecting groove are spaced at a safe distance.
The pin joint structure according to claim 1. A movable spacing member is provided at one end of the body portion, and when the pressing rod of the pin member moves and is inserted into the connecting groove, the operation portion is pressed against the spacing member.
The pin joint structure according to claim 1. A concave groove is provided on the side of the operation portion facing the body portion, and when the pressing rod of the pin member moves and is inserted into the connecting groove, the operation portion is one end of the body portion by the groove. To be worn outside the
The pin joint structure according to claim 3. The spacing member is a washer or a roller bearing;
The pin joint structure according to claim 3 or 4, wherein An annular groove is provided to surround the outer periphery of the body portion or the inner periphery of the sleeve so as to fit the leak-proof member.
The pin joint structure according to claim 1.