JPH0324954Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to pipe joint devices, and more specifically, to equipment that uses fluid pressure, and is used to control the on-off valve at the fluid pressure introduction or discharge part of the equipment. In contrast to main body side pipe fittings with
This invention relates to an improvement of a pipe joint device which can be connected detachably by direct operation and can open and close an on-off valve at the same time as the attachment and detachment operation.

[Conventional technology]

Generally, for this type of fluid pressure equipment,
The pipeline-side pipe fitting in the external fluid pressure system can be directly connected to the main-side pipe fitting with an on-off valve at the fluid pressure inlet or discharge part of the equipment in a single action, allowing the on-off valve to be opened and closed simultaneously. Many configurations of various types have been proposed for pipe joint devices that open and close.
As for the actual connection configuration, in normal cases, an on-off valve is installed inside the main body of the pipe joint on the main body side of equipment, etc., and the open/close female part of this main body is
Insert and connect the protruding male part of the pipeline side pipe joint of the fluid pressure system, simultaneously open the on-off valve with the male part, and lock it with a predetermined locking means provided on the female part. By restraining it, the connection and valve open state are maintained and the insertion is performed, and by releasing the locking by the locking means, the connected state is released and the main body side pipe joint is inserted. The male part of the pipe joint on the conduit side is pulled out from the female part, and the on-off valve is simultaneously opened and removed.

[The problem that the idea aims to solve]

However, in the conventional pipe joint device described above, the locking means itself is often relatively complex, and not only is it troublesome to attach and detach, but also the locking means is difficult to operate. This method had disadvantages such as lack of synchronization and easy failure.

This invention is an attempt to improve these conventional problems, and its purpose is to reduce the risk of failure by making the locking means as simple as possible. To provide a pipe joint device of this kind, which is relatively easy to attach and detach, and can be accurately synchronized with the opening and closing operation of an on-off valve, so that the desired action can be obtained. It is.

[Means to solve the problem]

In order to achieve the above object, the pipe joint device according to the invention includes a main body side pipe joint in which an on-off valve is installed and a conduit side pipe joint, and a connection formed in a receiving cylinder part of the main body side pipe joint. A pipe joint device in which a connection cylinder of a pipeline side pipe joint is removably connected to the space, so that an on-off valve can be opened and closed simultaneously with the connection/disconnection operation, and the pipe joint device has a connecting cylinder part of a pipe joint on the main body side in a main body. ,
a valve body that is held in a closed state by the elastic force of a valve spring is disposed, and at least one set of a locking groove and a guide groove are formed in the receiving cylinder part at a predetermined angular interval; Further, a locking ring is provided corresponding to the locking groove and has a locking piece protruding inwardly having a slope cam on a side portion and a locking surface on an end portion, and this locking ring is connected to the receiving cylinder portion. At the same time, it is fitted and pivoted on the rotating surface of the cam, and is constantly pressed by a spring elastic force, so that the side of the slope cam with the opening of the receiving groove on one side of the latching portion is pressed into contact with one side of the latching groove. Further, the connecting cylinder portion of the pipeline side pipe joint has an operating end portion that presses the valve body to maintain the valve open state at the time of connection, and the connecting cylinder portion has a locking groove formed in the locking groove. A locking pin and a guide pin are provided protrudingly to correspond to the receiving groove and the guide groove, and during connection, as the guide pin is guided by the guide groove, the locking pin applies a resilient force to the slope cam. to be evacuated against the
At the same time, the valve body is opened by the operating end, and the locking pin is locked and held on the locking surface.
At the time of extraction, the locking ring is rotated against the elastic force, the locking pin is released from the locking surface, the connecting cylinder is pulled out, and the valve body is closed at the same time. It is characterized by the fact that

[Effect]

That is, in this invention, when connecting the connecting cylinder part of the conduit side pipe joint to the connection space part of the main body side pipe joint, the guide groove of the receiving cylinder part forming the connection space part allows The guide pin of the connecting cylinder part is forcibly guided, and along with this guiding operation, the locking pin of the connecting cylinder part inserted from the receiving groove causes the slope cam on one side of the locking ring to be spring-loaded. It is repelled against the repulsive force, and at the same time, the operating end of the connecting cylinder part opens the valve body inside the main side pipe joint, and when the connection is completed, the locking pin is inserted into the locking surface of the locking end. By locking and restraining the valve, it is possible to easily connect, open, and hold the valve in one operation. When pulling out the connecting cylinder, rotate the locking ring against the spring force to release the locking surface of the locking piece end from the locking pin of the connecting cylinder. The connecting cylinder can be pulled out and the valve body can be closed at the same time.

〔Example〕

Hereinafter, one embodiment of the pipe joint device according to this invention will be described in detail with reference to FIGS. 1 to 7.

Fig. 1 shows the state of the main body side pipe joint and the conduit side pipe joint to which this embodiment is applied before connection in the usage state of the pipe joint device between the guide groove part and the locking groove part and between the guide pin part and the locking pin part. Figures 2 and 3 are end views of the main body side pipe fitting and conduit side pipe joint, respectively, as seen from the connection end side, and Figure 4 shows the same pipe joint as above. FIG. 5 is a vertical sectional view cleaved between the guide part and the locking part to show the state after connection in the usage state of the device, and FIGS.
b and FIG. 6 are detailed explanatory diagrams and action explanatory diagrams partially developed and showing the aspect of the locking part in the main body side pipe joint and the conduit side pipe joint, respectively, and FIG. It is a perspective view which shows another example of the formation aspect of the conduit side pipe joint same as the above.

In the configuration of each figure of these embodiments, reference numeral 10
is a cylindrical joint body of the main body side pipe joint A, 30 is an on-off valve disposed within this joint body 10, 40 is a locking ring rotatably mounted on the joint body 10, Further, 50 is a cylindrical joint body of the pipe joint B on the conduit side.

Therefore, the joint body 1 at the main body side pipe joint A
0, as shown in FIGS. 1 and 2, consists of a connecting cylinder 10a and a mounting cylinder 10b screwed onto the connecting cylinder 10a via a valve seat plate 31, which will be described later. In this case, on the outer circumferential surface of the base end of the mounting cylinder 10b, a mounting screw 11 for mounting to a mounting hole formed in, for example, a fluid pressure utilization device c is carved, and the connection A rotating surface 14 for pivotally supporting the locking ring 40 is formed on the outer peripheral surface of the tip receiving cylinder part 13 across the support stepped part 12 of the cylinder body 10a. Inside the cylindrical body, a connection space 15 is formed at the tip that is the connection end side, and the on-off valve 30 is mounted inside the cylindrical body 10b via a valve seat plate 31 that also serves as an abutment step surface. A flow passage section 17 is formed across an installation space section 16.

Here, as shown in FIG. 5a, the receiving cylinder portion 13 at the tip has a locking groove having a groove width _d1 sufficient to receive a locking pin, which will be described later. 18 and a guide groove 19 having a groove width d ₂ that accurately and forcibly guides a guide pin, which will be described later, at least one set (in this case, two sets at symmetrical positions) of the inner and outer sides. Over the entire length in the axial direction on both sides, holes are formed through each at a predetermined angular interval (in this case, 90 degrees to the symmetrical position) θ, and the springs are disposed close to the support stepped portion 12. A concave groove 20 for storing a retaining ring is formed close to the distal end surface, and a concave groove 21 for housing a retaining ring is formed around the entire circumference, and in one of the concave grooves 20,
One end 22a is connected to the guide groove 19 (or the locking groove 1
8) and is wound with a coiled spring 22 which is held therein, so that a retaining ring 23 can be engaged within the other concave groove portion 21.

Further, as shown in FIG. 1, the on-off valve 30 has a valve seat plate 31 sandwiched between the connecting cylinder 10a and the mounting cylinder 10b.
The valve body 32 has a valve body 32 which is always pressed into a closed state by the elastic force of a valve spring 33, and the distal end of the valve body 32 has a distal end operating end of a connecting cylinder portion 51 which will be described later. Abutment stepped portion 32 pressed by portion 51a
A is formed so that the valve can be opened by a pressing operation at the time of connection, which is performed against the elastic force of the valve spring 33.

Further, as shown in FIG. 5b, the locking ring 40 has the locking groove 18 in the inner peripheral surface.
_At least one locking piece 41 (in this case, _two symmetrically located locking pieces 41) corresponding to
d ₃ , a sloped cam 42 is formed on one side of the locking piece 41 along the axial direction, and a locking surface 43 is formed on the end surface of the base. The other end 22b of the coiled spring 22 is placed on the side.
A locking hole 44 for locking is bored.

As for this locking ring 40, the locking piece 41 thereof is inserted into the locking groove 18, and this is fitted into the rotating surface 14 of the cylindrical body portion 13, and the locking ring 40 is tightened. coiled spring 22
The other end portion 22b is inserted into the locking hole 44, and the recessed groove portion 21
The locking ring 40 is assembled by locking the locking ring 23 thereinto, and in this assembled state, the locking ring 40 can only rotate freely between the support stepped portion 12 and the locking ring 23. The locking piece 41 is pivoted and constantly pressed by the elastic force _P1 of the coiled spring 22, so that the locking piece 41 is pressed against the inner wall surface of one side of the locking groove 18, as shown in FIG. As a result, on the opening side of the locking piece 41 in the locking groove 18, the slope cam 4
A receiving groove 18a is formed on the second side, and an relief groove 18b is formed between the locking groove 18 and the other inner wall surface of the locking groove 18, and at the same time, the receiving groove 18a and the guide groove 19 are spaced at the predetermined angular interval. (In this case, they will be placed opposite each other with a distance of θ (90 degrees to the symmetrical position).

Next, the joint body 50 at the pipeline side pipe joint B
As shown in Figures 1 and 3,
On the connection end side, the length is equal to the axial length of the connection space 15 formed in the receiving cylindrical portion 13 of the joint body 10 in the main body side pipe joint A, and the distal end is the operating end 51a. It has a connecting cylinder part 51,
A flow passage portion 52 is formed in the cylindrical interior thereof, and the receiving groove portion 18a of the locking groove 18 and the guide groove 19 are formed at an outer circumferential surface position corresponding to the locking surface 43 of the connecting tube portion 51. The locking pin 53 and the guide pin 54 have a diameter smaller than the groove width _d1 corresponding to the groove width d1.
At least one set (also in this case, one pair at a symmetrical position, and two sets) at a predetermined angular interval (also in this case, 90 degrees at a symmetrical position) separated by θ, which is several times smaller than the depth of each groove. It is a slightly shorter protrusion.

Therefore, in the pipe joint device according to this embodiment configured as described above, as shown in FIG. By fitting the connecting cylinder part 51 of the joint body 50 of the conduit-side pipe joint B into the connecting space 15, the two pipe joints 10 and 50 are automatically connected, and the mounting cylinder is connected at the same time. The on-off valve 30 in 10b can be operated to open, and the locking ring 30 can lock and maintain the connected state, and by operating the locking ring 30, the connected state can be released. At the same time, the on-off valve 30 is closed, and the connecting cylinder part 51 of the conduit-side pipe joint B can be extracted and removed from the connection space 15 of the main-side pipe joint A.

That is, in the state before connection, as shown in FIG. The locking pin 53 automatically corresponds to the receiving groove 18a, and in this state, the connecting cylinder part 51 of the conduit side pipe joint B is inserted into the connection space part 15 of the main body side pipe joint A, and the guide pin 53 is connected to the guide groove 19. 54
When the locking pin 5 is inserted into the receiving groove 18a under the forced guidance of the
3 comes into contact with the slope cam 42 of the locking piece 41, and the insertion force P ₃ causes this to be pushed into the winding panel 22.
resisting the repulsive force P ₁ of , it once enters the relief groove 18b side while being repelled in the direction of the arrow, and on the other hand, the tip operating end 51a of the connecting cylinder 51 hits the abutment step of the valve body 32. It comes into contact with the portion 32a. Then, the locking pin 53 passes through the slope cam 42, and at the same time, the valve body 32 is pressed against the elastic force of the valve spring 33, separating from the valve seat plate 31 and opening the valve. The tip of the connecting cylinder portion 51 is the connecting space portion 15
In other words, the time when the interconnection of both the pipe joints 10 and 50 on the main body side and the pipe side and the opening of the on-off valve 30 are completed. Then, the repulsion of the locking piece 41 returns due to the elastic force _P1 of the coiled spring 22, and the locking pin 5
3 will be locked, accurately positioned and restrained in that position.

In other words, by simply inserting the connecting cylinder portion 51 of the conduit-side pipe joint 50 into the connection space 15 of the main-side pipe joint 10 as described above, the guide pin by the guide groove 19 can be easily inserted. 54, the locking pin 53 inserted from the receiving groove 18a repels the slope cam 42 of the locking ring 40 against the elastic force of the winding spring 22, and simultaneously displaces the valve body. The connection can be made by opening the valve 32, and when the connection is completed, the locking pin 53 is locked and restrained by the locking surface 43, and the two pipe joints 10 and 50 are automatically connected to each other in one operation. At the same time, the opening/closing valve 30 can be opened to allow both the pipe sections 17 and 52 to communicate with each other.

In addition, in the connected state in which the connection cylinder portion 51 of the conduit side pipe joint B is locked and held with respect to the connection space portion 15 of the main body side pipe joint A, the action against the elastic force P ₁ of the coiled spring 22 is While rotating the locking ring 40 with the power P ₂ , the connecting cylinder portion 5 of the conduit side pipe joint B is rotated.
1, the operation of the former releases the locking of the locking pin 53 which was restrained by the locking surface 43 on the base side end surface of the locking piece 41. Upon operation, the connection cylinder portion 5 of the conduit side pipe joint B is moved from the connection space 15 of the main body side pipe joint A.
1 can be easily extracted and removed.

In addition, in the above embodiment, the conduit side pipe joint B
, we have described the case where the locking pin and guide pin are provided as separate members protruding from the connecting cylinder part of the joint body, but for example, as shown in Fig. 7, these locking pins and guide pins can be installed from a normal pipe member. Of course, the guide pins may also be formed by directly punching them out.

[Effect of idea]

As described in detail above, according to this invention, a main body side pipe joint in which an on-off valve is installed and a conduit side pipe joint are provided, and the connection space formed in the receiving cylinder of the main body side pipe joint is provided with a In a pipe joint device that is removably connected to the connecting cylinder of a pipeline side pipe joint so that an on-off valve can be opened and closed at the same time as the connection/disconnection operation, the elastic force of the valve spring is applied within the main body of the main side pipe joint. At least one set of a locking groove and a guide groove are formed at a predetermined angular interval in the receiving cylinder, and the locking groove is A locking piece corresponding to the locking piece is provided protruding inwardly, and a locking ring is provided on the side of this locking piece with a sloped cam and a locking surface is formed on the end, and this locking ring is inserted into the receiving cylindrical part. In addition to fitting into the rotating surface of the
This is constantly pressed by the spring elastic force so that the slope cam side with the receiving groove on one side of the locking side opened is brought into pressure contact with one side of the locking groove, and further, the connecting cylinder of the conduit side pipe joint is pressed. is provided with an operating end portion that presses the valve body to hold it in the open state at the time of connection, and this connecting cylinder portion is provided with a locking pin and a guide corresponding to the receiving groove portion and the guide groove of the locking groove. Since the pin is configured to protrude, when connecting the connecting cylinder part of the conduit side pipe joint to the connection space part of the main side pipe joint, it is an extremely simple operation of simply inserting the connecting cylinder part into the connection space part. , the guide pin of the connecting cylinder part is forcibly guided by the guide groove of the receiving cylinder part, and along with this guiding operation, the locking pin inserted from the receiving groove part springs the slope cam of the locking ring. At the same time, the valve body of the on-off valve can be opened by the operating end of the connecting cylinder while being repelled against the elastic force.
Furthermore, at the end of the connection, the locking pin can be automatically locked and restrained by the locking surface of the locking end, and the connection operation, valve opening operation, and locking and holding in each of these states are performed. This can be easily done in one action, and when the connecting tube of the conduit-side pipe joint is removed from the connection space of the main-side pipe joint, the locking ring must be rotated against the spring force. The locking surface of the locking end of the locking pin of the connecting cylinder can be released by an extremely simple operation of simply moving the locking pin. The valve can be automatically closed, and the synchronization between the removable connection of both the main body side and pipeline side pipe joints and the opening/closing of the on-off valve inside the main body side pipe joint body is maintained accurately. Moreover, the structure itself is relatively simple, there is little risk of failure, and it has excellent features such as being easy to implement and being able to be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 shows the state of a pipe fitting device in use, before connection, between a main body side pipe joint and a conduit side pipe joint to which an embodiment of this invention is applied, and between the guide groove and the locking groove, and between the guide pin and the locking groove. FIGS. 2 and 3 are longitudinal cross-sectional views showing the respective cleavages between the pin parts, and FIGS. FIG. 5 is a vertical cross-sectional view showing the state of the above pipe joint device after connection in a usage state, cleaved between the guide part and the locking part, and FIGS. FIG. 7 is a detailed explanatory diagram and an operation explanatory diagram partially developed and showing the aspect of the locking part in each of the conduit side pipe joints, and FIG. 7 shows another example of the formation mode of the conduit side pipe joint. FIG. A... Main body side pipe joint, B... Conduit side pipe joint. 1
0... Joint body of main side pipe joint, 10a... Connection cylinder, 10b... Mounting cylinder, 11... Mounting screw, 12... Support step, 13... Receiving cylinder, 14... Rotation Surface, 15... Connection space part, 16
... Installation space for on-off valve, 17 ... Channel section, 18
...Latching groove, 18a...Receiving groove part of the locking groove,
18b... Relief groove part of the locking groove, 19... Guide groove,
20... Concave groove for housing spring, 21... Concave groove for housing retaining ring, 22... Winding spring, 23...
stop ring. 30...Opening/closing valve, 31...Valve seat plate,
32... Valve body, 32a... Valve body abutment stepped portion,
33...Valve spring. 40...Lock ring, 41...
Locking piece, 42... slope cam, 43... locking surface. 5
0...Joint body of conduit side pipe joint, 51...Connection cylinder part, 51a...Working end of connection cylinder part, 52...Flow passage part, 53...Lock pin, 54...Guide pin.

Claims (1)

[Scope of utility model registration request] A main body side pipe joint with an internal shutoff valve and a conduit side pipe joint are provided, and the connecting cylinder part of the conduit side pipe joint is detachably connected to the connection space formed in the receiving cylinder part of the main body side pipe joint. The pipe joint device is configured such that the on-off valve can be opened and closed at the same time as the attachment/detachment operation, and the valve body is held in a closed state by the elastic force of a valve spring in the main body of the main body side pipe joint. and at least one pair of locking grooves and guide grooves are formed in the receiving cylinder part at a predetermined angular interval, and a slope cam is provided on the side corresponding to the locking groove. A locking ring having locking pieces each having a locking surface protruding inwardly provided at the end thereof is provided, and the locking ring is fitted into and pivotally supported on the rotating surface of the receiving cylindrical portion,
This is constantly pressed by a spring elastic force, and the slope cam side with the opening of the receiving groove on one side of the lock is brought into pressure contact with one side of the lock groove, and further, the connecting cylindrical portion of the pipeline side pipe joint is pressed. The valve body has an operating end portion that presses the valve body to hold the valve in an open state at the time of connection, and the connecting cylinder portion has a locking portion that corresponds to a receiving groove portion and a guide groove of the locking groove. A pin and a guide pin are provided protrudingly, and when connected, as the guide pin is guided by the guide groove, the locking pin repels the slope cam against elastic force, and at the same time, the operating end After opening the valve body, this locking pin is held in place on the locking surface, and when removing the valve, the locking ring is rotated against the elastic force and the locking pin is held on the locking surface. 1. A pipe joint device characterized in that the connecting cylinder portion is pulled out by releasing the locking pin of the locking pin, and the valve body is closed at the same time.