JPH0317108Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a pipe joint device used for connecting fluid pipes, and more specifically, to pipe members for pressurized fluid, especially connecting This invention relates to an improved structure of a pipe joint device for quickly, reliably, and detachably connecting pipe members such as connecting tubes that have some surface elasticity so that they can be fastened together in one operation.

[Conventional technology]

Generally, in equipment that uses fluid pressure, a pipe joint is attached to the fluid introduction or outlet side of the equipment, and pressurized fluid is introduced into or discharged from this pipe joint. means for detachably connecting the pipe members in one operation;
In other words, a pipe joint device that can quickly and automatically connect flow paths to each other is employed.

However, the outline of this type of conventional pipe joint device is that it is usually made of materials such as polyurethane, polyamide (trade name: nylon), polyethylene, polytetrafluoroethylene (trade name: Teflon), etc. In this article, a pipe member such as a connecting tube formed to have some surface elasticity is to be connected, and the general structure of a pipe joint for connecting this pipe member is as follows: The inner diameter is such that the connecting end of the pipe member can be easily inserted in the same interior with the ring axis parallel to the inner axis (hereinafter referred to as the released orientation); In addition to providing a locking ring with a ring edge that locks and locks the connecting end of the pipe member in a non-returning manner in a posture in which the ring axis is inclined with respect to the axis (hereinafter referred to as a locking posture), By pressing this locking ring against the inclined ring surface that has a predetermined angle of inclination by the elastic force of the spring, it is possible to maintain the locking posture, and the connecting end side of the joint body In this case, a release means is provided for operating the locking ring which is pressed into the locking position from the outside into a releasing position against the elastic force.

In the case of a pipe fitting device configured in this way, in order to automatically connect a pipe member to a set pipe fitting, it is necessary to install a stopper from the connection end side of the fitting body that constitutes the pipe fitting. The connection end of the pipe member may be forcibly inserted into the stopper ring held in the position against the elastic force of the spring, and this insertion operation causes the connection end of the pipe member to be inserted into the stopper ring. While pressurizing the stop ring in the stop position to the release position,
It is pushed through the locking ring to a predetermined connecting position, and at this connecting position, the ring edge bites into the surface due to the biasing slope of the locking ring in the locking direction, and locks it. As a result, it is possible to prevent the connector from slipping out in the direction of non-connection. In other words, a quick and reliable connection can be achieved with just one action of forced insertion.

In addition, in order to pull out the connected pipe member from the pipe joint as described above and break the connection, by operating the release means, the stop ring in the stop position is applied with elastic force. All you have to do is pressurize it to the release position against the pressure and keep it in this position, that is, release the biting into the surface of the ring edge and pull out the pipe member. After this connection is released, the locking ring can be moved again. , and is held in a position to receive the tubing member for connection.

[The problem that invention attempts to release]

However, in the case of the conventional pipe joint device configured in this way, the biting force of the ring edge of the stop ring on the surface of the pipe member, in other words, the stopping force, is the force that causes the stop ring to be in the stopping position. It depends only on the elastic force of the biasing spring, and in order to make this blocking force work effectively, the difference between the inner diameter of the blocking ring and the outer diameter of the pipe member is minimized. Therefore, the degree of inclination of the locking ring in the locking position is small.On the other hand, if you want to make the locking force strong, you must apply more than a sufficient elastic force to the spring. In this case, not only does it become difficult to insert the pipe member when connecting it, making it difficult to operate it, but also makes it difficult to operate the release means when pulling out the pipe member.
In order to maintain the suspended position, it is necessary to keep the spring energized at all times, so there are problems such as the fatigue of this spring and the resulting breakage. It had the following characteristics.

This invention is an attempt to improve these conventional problems, and its purpose is to make it easy to connect and pull out the pipe member from the pipe joint, and to prevent it from getting stuck during connection. It is an object of the present invention to provide a pipe joint device of this type in which the force does not have to depend solely on the elastic force of a pressurizing means.

[Means to solve the problem]

In order to achieve the above object, a pipe joint device according to the present invention is a pipe joint device that inserts a connecting end of a pipe member to be connected and connects the connecting end in a blocked state, The joint body has at least a hollow cylindrical interior with a blocking space formed therein, and a regulating guide groove parallel to the axial direction formed in correspondence with the blocking space, and an inclined end face having a predetermined angle. hand,
An inclined ring is attached to the distal end side in the tension stop space, and an inclined ring is formed on an outer circumferential surface having an arcuate longitudinal section and is attached to the proximal end side in the tension stop space, and the restriction ring is attached to the arcuate outer circumference. An operating lever is provided that protrudes to the outside through the guide groove, and the inner diameter is such that the connecting end of the pipe member can be inserted in an upright position with the ring axis parallel to the axis of the joint body, A locking ring having a ring edge formed on its inner circumferential surface that can lock the surface of the connecting end in an inclined position with the ring axis inclined with respect to the internal axis, and the locking ring is attached to the inclined end surface. a pressurizing means for applying pressure, a cam opening that is rotatably fitted into the joint body and that receives the operating lever in correspondence with the regulation guide groove, and a proximal end of the cam opening; On the side locking cam surface, there is a starting cam position corresponding to the upright position, a high point cam position that is tilted from this starting cam position to the tip side and exceeding the intermediate point blocking cam position, and a high point cam position that The locking ring is provided with a tightening ring in which an end-point locking cam position is formed to obtain a locking action.

[Effect]

That is, in this devised device, first, the connecting end of the pipe member is forcibly inserted from the distal end connection side of the joint body through the inclined ring of the blocking space into the blocking ring in the standby position. , the connecting end of the pipe member penetrates the locking ring while pushing it against the elastic force of the pressurizing means to pull it toward the release position, moves the operating lever to the starting cam position, and in this state Then, the operating lever is moved to the intermediate point locking cam position by the elastic force of the pressurizing means, and the locking ring is pressed and biased in the locking direction to lock the surface of the connecting end of the pipe member. . Next, in this state, by rotating the tightening ring,
The operating lever of the sagging ring at the intermediate point sagging cam position once contacts the sagging cam surface, and then moves beyond the previous intermediate sagging cam position to the high point cam position where the degree of sagging is strengthened. The final stop cam position is reached, and an even stronger stop is made at this end stop cam position, and in this way, the expected stop and restraint action is achieved only by the stop cam surface. be.

〔Example〕

Hereinafter, one embodiment of the pipe joint device according to this invention will be described in detail with reference to FIGS. 1 to 3.

Figures 1a, b, and c are a plan view and an end view showing the state before connection of a pipe joint device to which this embodiment is applied, and a longitudinal cross-sectional view taken along line c-c in Figure 1b, and Figure 2.
Figures a and b are longitudinal cross-sectional views showing each aspect of the insertion point and the blocking point of the pipe member when the above is connected, and Figures 3a and b are the views of the operating lever and the blocking cam surface when the above is connected. FIG. 3 is an explanatory plan view showing the relationship.

That is, in the configuration of this embodiment device, reference numeral 10 denotes a cylindrical joint body of the pipe joint;
0 is an inclined ring, 40 is a locking ring, 50 is a tightening ring, and 70 is a pipe member to be connected, which is made of, for example, polyurethane, polyamide (trade name: nylon), polyethylene, polyurethane, etc. Using a material such as tetrafluoroethylene (trade name: Teflon), some of the surface is made so that the sharply angled inner ring edge of the locking ring 40 can be bitten and held in place in a non-returning manner. It gives it elasticity.

In this case, the joint main body 10 includes, for example, a mounting screw 11 for mounting on a flow path outlet of a fluid pressure utilization device (not shown), etc.
A hexagonal body part 12 for screwing this together is formed on the outer circumferential surface of the proximal end side, and inside the hollow cylindrical shape, sequentially from the distal end side,
A blockage space 13 having a predetermined inner diameter for obtaining a blockage effect, a connection space 14 for receiving the connection end of the pipe member 70, and a communication space 15 for communicating with the flow path extraction part. In addition, a regulation guide groove 16 parallel to the axial direction is formed on the tip side corresponding to the blocking space 13, and the outer circumferential surface of the tip side and the stepped portions 18a, 1
and the outer peripheral surface in contact with the hexagonal body 12 via 8b,
Cylindrical sliding surfaces 17a and 17b are formed.

Then, the regulation guide groove 1 in the blockage stopping space 13 is
A stopper ring 20 for regulating the inclined ring 30 to a predetermined set position can be fixed to the inner surface of the inner circumferential groove 19 on the distal end side of the ring 6, and a stopper ring 20 for regulating the inclined ring 30 to a predetermined set position can be fixed to the inner circumferential groove 19. The outer surface of the groove 16 on the tip end side is located in the outer circumferential groove 21,
For locking the inclined ring 30 at a predetermined set position and restricting the tightening ring 50 from freely rotating only in the circumferential direction at the predetermined set position,
The stopper ring 22 can be fastened thereto, and the connection space 14 has a groove for sealing the surface of the connection end of the pipe member 70 in the inner circumferential groove 19 of the intermediate portion. An O-ring 23 is attached.

Next, the inclined ring 30 has an outer diameter that allows it to be tightly fitted into the blocking space 13, an inner diameter that allows the pipe member 70 to be easily inserted, and a predetermined axial length. A protrusion 31 that is inserted into the inner tip of the regulation guide groove 16 and locked by the stopper ring 22 is protruded from the side part (upper part in FIG. 1c), and the tip side is restrained and regulated by the stopper ring 20. The end face 32 is the protruding part 3.
The ring 30 has an inclined end surface 33 that gradually slopes from one side to the opposite side, and this inclined ring 30 is fitted into the tip of the locking space 13 and held at a predetermined circumferential angular position by the protrusion 31. In the state
It is fixed by respective stopper rings 20 and 22.

Next, the stopper ring 40 has an outer diameter slightly smaller than the inner diameter of the stopper space 13, and is formed on an outer circumferential surface 41 having an arcuate longitudinal section, and is formed on one side of the arcuate outer circumferential surface 41. It has an operating lever 42 that protrudes outside through the regulation guide groove 16 and a cam opening of a tightening ring 50, which will be described later. On the inner circumferential surfaces of the and proximal end sides, in an upright position with the ring axis parallel to the internal axis of the joint body 10, that is, in the released position,
The pipe member 70 has an inner diameter that allows the connection end of the pipe member 70 to be easily inserted, and the pipe member 70 is in an inclined position in which the ring axis is inclined with respect to the internal axis of the joint body 10, that is, in the blocking position. Each ring edge portion 4 is slightly bitten into the surface of the connecting end portion of 70 against its surface elasticity, and by biting this, the ring edge portion 4 can be held in a non-returning manner.
3 and 44 are formed, and it is desirable that each of these ring edge portions 43 and 44 be formed sharply to the extent that the surface of the connection end of the pipe member 70 is not damaged as much as possible. The ring 40 is fitted in the proximal end of the locking space 13 so as to be in contact with the inclined end surface 33 of the inclined ring 30, and its operating lever 42 is connected to the regulating guide groove 16 and the tightening ring described below. By interposing a compressed winding spring 45 between the operating rod 42 and the step portion 18a, the inclined end surface 33 is pulled out by the elastic force of the winding spring 45.
In the state in which the connectors are pressed into contact with each other, that is, when they are not connected, they are held in an inclined position.

Furthermore, the tightening ring 50 is composed of an outer cylinder 51 having a tip inner flange 51b and a base end 52b that are fitted into the cylindrical sliding surfaces 17a and 17b of the joint body 10. On one side (also the upper part in Fig. 1 c), Fig. 3 a, b
As shown in , the cam opening 53 is drilled and opened, and on the inner surface of the base end side of the cam opening 53, there is a starting cam position a corresponding to the upright position, and from this starting cam position a. The inclination gradually increases toward the tip side, and at least a high point cam position c that exceeds the intermediate point blocking cam position b by only the winding spring 45, which will be described later, and the desired blocking effect is achieved through this high point cam position c. The tightening ring 50 is formed with a locking cam surface 54 having an end point locking cam position d and a locking cam position d, which performs a restraining action. The stopper ring 22 is fitted so that it can rotate freely only in the circumferential direction, and
3, and the operating lever 42 is taken out to the outside. In addition, in the figure, 55 indicates a hexagonal body portion for rotating this tightening ring 50.

Therefore, in the case of the embodiment device having the above configuration, in the unconnected state, the stop ring 40 in the joint body 10 is biased by the winding spring 45, as shown in FIGS. 1a, b, and c. Inclined ring 3
The operating lever 42 of the locking ring 40 is pressed against the inner surface of the distal end side of the cam opening 53 of the tightening ring 50. , and the tightening ring 50 is configured to be rotatable only in the circumferential direction at the fitting position with respect to the joint body 10.

In order to automatically connect the pipe member 70 to be connected to the pipe joint device in the unconnected state, the following operation is performed.

That is, first, the connecting end of the pipe member 70 is forcibly inserted from the distal end connection side of the joint body 10 through the inclined ring 30 in the blockage space 13 into the blockage ring 40 in the standby position. .

By this insertion operation, the connecting end of the tube member 70 is brought into contact with the end surface of the stopper ring 40,
This retaining ring 40 is attached to its arcuate outer peripheral surface 4.
1 as a fulcrum, it penetrates the stop ring 40 while being pushed against the elastic force of the winding spring 45 in the direction of standing upright, that is, toward the release position. At this time, the operating lever 42 of the stopper ring 40 is moved from the position where it is pressed against the inner surface of the tip end of the cam opening 53 to the upright position, as shown in FIG. 3a. The starting point cam position a is reached.

The connecting end of the pipe member 70 is then inserted into the connecting space 14, sealed with the O-ring 23, and inserted to a desired stop position. The retaining ring 40 is pressed in the retaining direction, that is, in the tilting direction, using its arcuate outer peripheral surface 41 as a fulcrum by the elastic force of the winding spring 45, and the center included in the upper half of the distal ring edge portion 43 is biased. and the center portion included in the lower half of the proximal ring edge portion 44 are designed to be non-returning so that they bite into the surface of the connecting end of the tube member 70 somewhat against its surface elasticity. be bitten by. Also, at this time, the operating lever 42 of the stop ring 40
is the cam opening 5 as shown in Figure 3a.
From the starting cam position a at 3, the winding spring 45
When the latching position reaches the intermediate cam position b, the latching is stopped only by the winding spring 45. (Generally, in the conventional case, the connection is usually completed in this state even if the configuration is different.) Next, in this embodiment, the wound spring shown in FIG. 45 only, by rotating the tightening ring 50 in the direction of the arrow a, the operating lever 42 of the tightening ring 40, which is at the intermediate point b, can be rotated in the same direction. As shown in FIG. 3b, as shown in FIG. 3b, once it comes into contact with the blocking cam surface 54, it crosses the previous intermediate point blocking cam position b, and the degree of inclination increases. As a result, the high point cam position c is reached where the degree of blockage is strengthened, and beyond this high point cam position c, the final blockage stopping cam position d is reached, and at this terminal blockage stopping cam position d, the winding spring 45
A stronger restraint is achieved than could otherwise be obtained, and in this way, here:
Even though the winding spring 45 is biased, the desired tension stopping and restraining action is achieved only by the tension stopping cam surface 54, which is not directly involved in this biasing. be.

Next, in order to pull out the pipe member 70, which has been connected and held and restrained as described above, from this pipe joint device and break the connection, first, the pipe member 70 is locked to the end point stop position cam d. Once the operating lever 42 of the locking ring 40 is pressed slightly toward the distal end side with a fingertip or the like, the locking state is released, and the tightening ring 50 is moved in the direction indicated by the arrow in FIG. 3b. By rotating in the direction indicated by , the blocking action and the restraining action by only the blocking cam surface 54 are released, and the cam returns to the intermediate blocking cam position b by only the winding spring 45, and then, By slightly pressing the operating lever 42 toward the proximal end side with a fingertip or the like and returning it to the starting cam position a, the operating lever 42 and, by extension, the locking ring 40 are brought to the upright position, so this state is achieved. This allows the tube member 70 to be easily pulled out.

〔Effect of the invention〕

As detailed above, according to this invented device,
In a pipe joint device in which a connection end of a pipe member to be connected is inserted and the connection end is connected in a jammed state, a jamming space is formed at least inside a hollow cylinder, and the pinching stop is A joint body is provided in which a regulation guide groove parallel to the axial direction is bored corresponding to the space, and an inclined ring having an inclined end face at a predetermined angle is attached to the distal end side of the stopper space, and the longitudinal section has an arcuate shape. A stop ring formed on the outer circumference of the joint is attached to the proximal end side in the stop space, and the stop ring is mounted in an upright position with the ring axis parallel to the axis of the joint body. The inner diameter is such that the connecting end of the pipe member can be inserted therethrough, and a ring edge portion is formed on the inner circumferential surface of the pipe member so that the surface of the connecting end can be clamped in an inclined position with the ring axis tilted with respect to the internal axis. The arc-shaped outer circumferential surface is provided with an operating lever that protrudes to the outside through the regulation guide groove, and is further provided with a pressing means for pressing the stop ring against the inclined end surface. A tightening ring is fitted so that it can only be moved, and has a cam opening that accepts the operating lever corresponding to the regulation guide groove, and a locking cam surface on the proximal end of this cam opening that corresponds to the upright position. A starting point cam position where the load is stopped, a high point cam position which is tilted from this starting point cam position toward the tip side and exceeding the intermediate point blocking cam position, and an end point blocking cam position where the blocking action is obtained through this high point cam position. Therefore, first, the connecting end of the pipe member is forcibly inserted into the stopper ring in the standby position from the end connection side of the joint body through the inclined ring in the stopper space. The connecting end presses the stop ring against the elastic force of the pressurizing means to pull it toward the release position, and penetrates the stop ring, moves the operating lever to the starting cam position, and in this state. By the elastic force of the pressure means, the operating lever can be moved to the intermediate stop cam position, and the stop ring can be pressed in the stop direction, whereby the surface of the connecting end of the pipe member is pressed. can be made to bite in a certain way against its surface elasticity in a non-returning manner, that is, in this case, a blocking action can be performed only by the elastic force of the pressurizing means, and then, In this state, by rotating the tightening ring, the operating lever of the locking ring located at the intermediate point locking cam position will once come into contact with the locking cam surface, and then the locking ring will be stopped at the previous intermediate point. After passing through the cam position and reaching the high point cam position where the degree of blockage is increased, it reaches the end point blockage cam position, and at this terminal blockage stop cam position,
An even stronger anti-squeezing effect can be obtained by using only the anti-sagging cam surface.

Therefore, in this devised device, the biting force of the ring edge of the locking ring on the surface of the pipe member, that is, the locking force, is equal to the elastic force of the pressure means that urges the locking ring to the locking position. This enables a stronger locking action to be obtained using only the locking cam surface, without relying on the locking cam surface. In addition, it is easy to insert the pipe member when connecting it, and to pull it out when disconnecting it, making the operation easy. As for maintaining the state, since there is no need to constantly apply pressure using the pressurizing means, there is no need to consider spring fatigue or breakage of the pressurizing means, and it is possible to effectively maintain the desired state. It has various excellent features, such as being able to perform both a blocking action and a restraining action, and that the overall structure of the device itself is relatively simple and easy to construct, and can be provided at low cost.

[Brief explanation of the drawing]

Figures 1a, b, and c are a plan view and an end view showing a state before connection according to an embodiment of the pipe joint device according to the invention, and a longitudinal cross-sectional view taken along line c-c in Figure 1b, and Figure 1-c. Figures 2a and b are longitudinal cross-sectional views showing the insertion and locking of the pipe member when the same connection is made as above, and Figures 3a and b are the operating lever and the locking cam surface when the same is connected. FIG. 10... Joint body, 13... Blockage space, 14
... Connection space section, 16 ... Regulation guide groove, 30 ...
Inclined ring, 31... Projection, 32... Regulating end surface, 33... Inclined end surface, 40... Stopping ring, 4
1... Arc-shaped outer peripheral surface, 42... Operation lever, 4
3, 44... Ring edge portion, 45... Winding spring (pressurizing means), 50... Tightening ring, 51
... Outer cylinder, 53 ... Cam opening, 54 ... Stopping cam surface, a ... Start point cam position, b ... Intermediate point stoppage cam position, c ... High point cam position, d ... End point stoppage Stop cam position, 70... Pipe member to be connected.

Claims (1)

[Scope of utility model registration request] Insert the connecting end of the pipe member to be connected,
A pipe joint device that connects the connection end in a jammed state, which has a blocking space formed at least inside the hollow cylinder, and a regulating guide parallel to the axial direction corresponding to the blocking space. a joint body with a groove formed therein; an inclined ring having an inclined end face at a predetermined angle and mounted on the distal end side in the stopper space; The operating lever is mounted on the proximal end side in the stop space, and is provided with an operating lever that protrudes to the outside through the regulation guide groove on the arcuate outer circumferential surface. The inner diameter is such that the connecting end of the pipe member can be inserted in an upright position, and the surface of the connecting end can be clamped in an inclined position where the ring axis is inclined with respect to the internal axis on the inner circumferential surface. a stop ring formed with a ring edge portion; a pressure means for pressing the stop ring against the inclined end surface; A cam opening that receives the operating lever is opened, and a starting cam position corresponding to the upright position and an intermediate position that is inclined from the starting cam position toward the distal end are placed on the proximal end side blocking cam surface of this cam opening. High point cam position beyond the point stop cam position,
A pipe joint device characterized in that it comprises a tightening ring that forms an end-point blocking cam position that obtains a blocking action through this high-point cam position.