JP2825180B2 - Pipe member connection plug device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection plug device for a pipe member applied to a pressurized fluid, and more particularly, to a pipe member serving as a pipe flow path of a pressurized fluid with respect to a connection plug main body, in particular, a connection member. The present invention relates to an improvement in a connection plug device used for connecting a pipe member such as a connection tube having some surface elasticity so as to be able to be fastened, detachably and quickly by a simple operation.

[0002]

2. Description of the Related Art In general, in various equipments and the like utilizing fluid pressure, a connection plug device is previously attached to a pressurized fluid inlet or outlet of the equipments or the like. In many cases, a pipe member for flowing a pressurized fluid is detachably connected to the connection stopper device by a simple operation.

[0003] In this type of connection plug device for a pipe member, as the pipe member, for example, polyurethane, polyamide (trade name)
Hollow tube formed mainly of synthetic resin material such as nylon), polyethylene, polytetrafluoroethylene (trade name: Teflon), here connection tube formed to have some surface elasticity And other hollow tubes. The configuration of the conventional connection plug device for connecting and connecting this pipe member is such that the connection end of the pipe member is in an open position in which the ring axis is parallel to the plug body axis inside the connection plug body in the connection direction. A ring edge is formed that has an inside diameter that allows easy insertion of the pipe member, and that stops and restrains the connection end of the pipe member in a locked state in which the ring axis is appropriately inclined with respect to the plug body axis. A strung ring is provided, and the strung ring is pressed against an inclined ring surface having a predetermined inclination angle by elastic force of a spring so that the strung posture can be maintained, and a connection end portion of the connection plug main body is provided. On the side, a release actuating means is provided for actuating the striking ring, which is maintained elastically in the striking position, to the releasing position against external elastic pressure.

[0004] In the case of the conventional connection plug device, in order to automatically insert and connect the pipe member to the connection plug main body which is set in advance in pressure-using equipment or the like, a connection end side of the connection plug main body is required. Therefore, the connecting end of the pipe member may be forcibly press-fitted against the elastic force of the spring into the banding ring held in the banding position. The part is pressed into the required connecting position through the banding ring while pressing the banding ring in the banding position to the release position, and then the banding of the banding ring is performed at the connection position. With the biasing inclination in the direction, the ring edge bites into the surface of the tube member and is engaged therewith, so that the ring edge is connected to the pipe member by the action of striking out in the opposite connection direction. That is, in this case, quick and reliable, yet detachable connection can be easily achieved only by simple forced press-fitting of the pipe member.

On the other hand, in order to pull out the connected pipe member from the connection plug main body, the release operation means is operated to bring the banding ring in the banding position into the release position against the elastic pressure. It is only necessary to withdraw while holding the release position while pressurizing, that is, in other words, while releasing the biting of the ring edge into the surface of the tube member, and after pulling out the tube member, The ring is again held in the receiving position for connection of the tube members.

[0006]

However, in the case of the conventional connecting plug device for a pipe member having the above-mentioned structure, the biting force on the surface of the pipe member by the ring edge of the striking ring, and furthermore, the striking force. Depends only on the resilient pressure of the spring that is urging the banding ring to the banding position, and
Since the difference between the inner diameter of the strap ring and the outer diameter of the tube member is minimized as necessary to effectively exert the strapping force, the degree of inclination of the strap ring in the strapping position is reduced. If the spring is relatively small and the strangulation force is to be increased, the spring must be given a sufficient elasticity, which inevitably causes the connection and press-fitting of the pipe member to be difficult, and the operation becomes difficult. It is not easy to release the tube member when pulling it out, and it is necessary to keep the striking posture constant with the elastic pressure of the spring, so that fatigue and breakage of the spring must be considered. In addition, the mechanism of the entire apparatus itself is relatively complicated and the provision price is high, so that it is not necessarily suitable as a simple apparatus for easily connecting and connecting this kind of tube member. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem.
It is an object of the present invention to provide a pipe member connecting plug device capable of quickly and reliably connecting, pulling out, and detaching a pipe member to and from a connecting plug main body by a simple operation.

[0008]

In order to achieve the above-mentioned object, a connecting member for a pipe member according to the present invention is provided with a pipe member to be connected and connected without using an elastic force such as a spring as a strapping means. For the strapping and release operations, the cam action of the strapping cam surface is utilized, and also for the amount of fluid pressure or pressure fluctuation in the strapping state, the cam action of the pressure-resistant cam face is utilized. The connection connection and the connection maintenance by the always effective banding can be obtained with a simple configuration.

That is, the invention described in claim 1 of the present invention provides:
A connection plug device for a pipe member that inserts a connection end of a pipe member to be connected, connects and connects the connection ends in a strung state, and maintains the connection, at least in an interior along a connection axis direction. A hollow cylindrical connection plug main body having a banding space portion and receiving a pipe member by threading one fastening screw at a connection side end, and screwing the one fastening screw at a fastening end side; The other tightening screw is threaded, and at least the striking cam surface which is gradually inclined from the tightening end side toward the center, and the pressure resistance which is connected to the striking cam surface via an intermediate step portion. A hollow cylindrical fastening member for receiving the pipe member by sequentially forming the cam surfaces and an annular base that is inserted into the strangulation space and slidable on the connection axis to receive the pipe member. Extending from the connection side end of the annular base to the clamping end, and A plurality of bendable surfaces, each of which is provided with a locking cam surface, an arcuate surface that abuts against the pressure-resistant cam surface and receives a cam action, and a locking surface that locks the surface of the tube member that protrudes and receives inward. A pipe member comprising: a strap member provided with a strap piece; and a slide restricting means for regulating a sliding range of each strap piece within the strap space within the pressure-resistant cam surface. It is a connection stopper device.

In the connecting plug device for a pipe member according to the first aspect of the present invention, the stop ring is fitted into the restricting circumferential groove of the strapping member, and the stop ring is pressed into the restricting circumferential groove. When the banding piece is fitted into the banding space of the connection plug body as it is, the retaining ring pressed to the position of the holding circumferential groove is engaged and held in the holding circumferential groove, and is connected to the connection plug body. The banding member is fitted and engaged, so that the banding member can slide with respect to the connection plug main body within the width range of the regulating circumferential groove. When the tightening body of the tightening member is screwed into the tightening body of the connection plug main body, the arc surface formed on each of the banding pieces of the banding member contacts the outer peripheral surface of the banding cam surface. In contact and in an acceptable pre-connection state of the tubing to the device. Then, when the connection end side of the pipe member is inserted from the connection end side of the device, the connection end side of the pipe member is inserted into the connection plug main body through the fastening member and the strapping member, and the connection end protrudes. It is connected and inserted in contact with the contact step. Further, when the tightening member is tightened until it abuts the connection end face of the connection plug main body, the connection side inner edge of the regulating circumferential groove of the striking member is struck by the stop ring and is restrained, and the strut piece extending from the striking member is restrained. The arc surface is pressed against the striking cam surface to receive the cam action, and the striking projection is gradually bite into the surface of the pipe member, so that the strangulation is stopped, and the arc surface is moderate in the middle step portion. Into a connected state. On the other hand, when the pipe member is extended by the pressure of the pressurized fluid in the connected and connected state, the banding member slides within the range of the sliding regulation of the regulating circumferential groove, and the arc surface of the banding piece acts as the cam of the pressure-resistant cam surface. To automatically adjust the retaining force in response to the pressure level or pressure fluctuation.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a pipe member connecting plug device according to the present invention will be described in detail with reference to FIGS.

FIGS. 1 (a) and 1 (b) are a side view, an end view, and FIGS. 2 (a), 2 (b), and 2 (b) showing the appearance of a pipe member connecting plug device to which an embodiment of the present invention is applied. FIG. 3C is a vertical cross-sectional view of a central portion, a left end view, and an enlarged vertical cross-sectional view of a main part of the banding member taken out of the device of the embodiment and shown in detail. FIG. 3 is a longitudinal sectional view of a central portion showing an upper half configuration in which a pipe member is connected and inserted into the apparatus of the embodiment,
FIG. 4 is a longitudinal sectional view of a central portion showing an upper half configuration in which the inserted pipe members are struck together, and FIG. 5 shows a state in which fluid pressure is applied to the connected pipe members. It is a longitudinal cross-sectional view of the central part showing the upper half aspect at the time.

That is, in the configuration of the embodiment shown in FIGS. 1 and 2 and FIGS. 3 to 5, reference numeral 10 denotes a connection plug main body, 30 denotes a fastening member, and 40 denotes a strapping member.
Each of these members is substantially formed in a hollow cylindrical shape so as to receive the tube member 50 to be connected, and the tube member 50 is made of, for example, polyurethane or polyamide, as described above. By using a resin material such as polyethylene, polytetrafluoroethylene, or the like, the below-described acute angle wedge-shaped banding projections (locking surfaces) of the banding member 40 can be bitten into the surface and can be stopped non-returnably. In order to achieve this, a certain degree of surface elasticity is imparted, and a slight degree of extensibility corresponding to the amount of pressurized fluid flowing through the inside, pressure fluctuation, or a pulling force from the outside is given.

In the case of the present embodiment, for example, the connecting plug main body 10 has a mounting male thread 12 for screwing and connecting to a flow path end of a fluid pressure utilizing device or the like (not shown) on the base end side. Attachment body 11 carved and formed with hexagonal head 13 for screwing
And a fastening body 15 protruding from the connection end face 14 of the mounting body 11 and having a fastening male thread 16 threaded at the tip. In addition, inside the hollow cylindrical shape on the connection axis A passing through these body portions 11 and 15, sequentially from the base end side,
The flow path 17, an abutting step 18 for abutting the connection end 51 of the pipe member 50, and an insertion surface 19 for inserting the end side outer peripheral surface 52 are formed respectively, and between the insertion surface 19. After setting the banding space portion 21 through the play step portion 20, a sliding inner peripheral surface 22 having a larger diameter is formed,
Further, a holding peripheral groove 23 which is a part of the sliding restricting means is formed at an appropriate position in the intermediate portion of the sliding inner peripheral surface 22, and a seal ring 24 is mounted and interposed near the play step portion 20. It is.

The tightening member 30 has a tightening body 31 having a hexagonal head 32 for tightening.
1 inside the hollow cylindrical shape on the connection axis A through which the female screw 33 is screwed onto the male screw 16 in order from the base end side and integrated with the connection plug body 10. With the play step 34 interposed between the internal thread 33 and the fastening female thread 33, the end face portion facing the engagement space portion 21, the engagement cam surface 35 gradually inclined toward the center, and A pressure-resistant cam surface 37 having a cam action width B connected to the strangulation cam surface 35 via the intermediate step portion 36 is formed on each of the
A similar insertion surface 38 having substantially the same diameter as the insertion surface 19 is formed.

The banding member 40 is connected to the banding space 2.
1 and on the connection axis A, and thus the sliding inner peripheral surface 2
2 has an annular base 41 which is slidably brought into sliding contact with a sliding outer peripheral surface 42, and the pressure-resistant cam is formed on the sliding outer peripheral surface 42 in correspondence with the formation position of the holding peripheral groove 23. A regulating circumferential groove 43 having a width corresponding to the cam action width (sliding regulating range described later) B of the surface 36 is formed. As shown in FIG. 2, a plurality of bendable latching pieces 44 extend to the fastening end side at equal angular intervals from the connection side end of the annular base 41. The extended end portion (clamping end portion) has an arcuate surface 45 which comes into contact with the strangulation cam surface 35 and the pressure-resistant cam surface 37 and receives a cam action. And a striking projection (locking surface) 46 for locking and locking the specific surface 53.

In the structure of each of the above members, first, a stop ring 47 is fitted into the regulating peripheral groove 43 of the strangulating member 40 and the retaining ring 47 is pressed into the regulating peripheral groove 43. The connecting stopper main body 1 is
0 when fitted into the strangulation space 21 of the
The stop ring 47 pressed down to the position is expanded again to be engaged and held in the holding circumferential groove 23, that is, the strapping member 40 is fitted and engaged with the connection plug main body 10. In this fitted state, the connection plug main body 10
On the other hand, the strap member 40 can slide only within the width range of the regulating circumferential groove 43, in other words, only within the sliding regulation range.

Next, when the tightening body 31 of the tightening member 30 is screwed into the tightening body 15 of the connection plug main body 10, each tightening piece 44 of the locking member 40 is formed. The arcuate surface 45 is brought into contact with the outer peripheral surface side of the preceding strangulation cam surface 35 formed on the clamping body 31, and thus the receivable connection of the pipe member 50 to the device is achieved. Become the previous state.

Here, the pipe member 5 is connected from the connection end side of the apparatus.
When the connection end side of the tube member 50 was inserted, the connection end side of the tube member 50 passed through the insertion surface 39 of the tightening member 30, then passed through the strapping member 40, and was sealed with the seal ring 24. Later, the connection plug body 10 is inserted into the insertion surface 17, and the connection end 51 abuts against the abutting step 16 to be easily connected and inserted. That is, the connection insertion state of FIG.

Subsequently, in the connection inserted state, when the tightening member 30 is re-threaded and tightened until it comes into contact with the connection end surface 14 of the connection plug main body 10, the locking member 40
The connection side inner edge of the regulating circumferential groove 43 is abutted against the stop ring 47 and is restrained, so that the arc surface 45 of the banding piece 44 extended from the banding member 40 is pressed against the banding cam surface 35. Under the action of the cam, the strangulation projection 46 is connected to the pipe member 5.
0 is gradually bitten into the specific surface 53 so that the strangulation is achieved, and the arc-shaped surface 45 becomes the intermediate step portion 36.
In this case, the end of the tightening can be easily perceived because the drop is moderate. At this time, the arc surface 45 comes into contact with the outer peripheral surface side of the pressure-resistant cam surface 37 in the subsequent stage. Become. That is, the connection and coupling state shown in FIG.

On the other hand, when the pressurized fluid is supplied and circulated into the pipe member 50 including the inside of the flow path 17 in the connection and connection state, the pipe is connected in accordance with the pressure applied to the pressurized fluid. Although the member 50 tends to be somewhat elongated, and there is a fear that the retaining force for the banding may be reduced, in this apparatus, the band member 50 bites into the specific surface 53 as the tube member 50 is expanded. Since the stop projection 46 and, consequently, the banding member 40 are slidable within the sliding regulation range set in the regulating circumferential groove 43, the arc of the banding piece 44 that moves in cooperation with the extension. Face 45
However, this time, while being pressed against the pressure-resistant cam surface 37, it is subjected to a cam action, and as shown in FIG. 5, the retaining force can be automatically adjusted according to the amount of pressure or the pressure fluctuation. is there. Then, in order to pull out the tube member 50 from the apparatus in this state, the operation reverse to the above may be performed.

[0022]

As described in detail above, according to the pipe joint device according to the first aspect of the present invention, the connection end of the pipe member to be connected is inserted. In the connecting plug device of a pipe member for connecting and connecting the connecting ends in a locked state, the connecting plug device has a banding space at least inside the connection axial direction, and one of the tightening spaces is provided at the connecting side end. A hollow cylindrical connection plug main body for receiving a pipe member by threading a thread, and threading the other fastening screw to be screwed to one of the fastening threads on the fastening end side, and centering at least from the fastening end side Hollow cylindrical fastening member for sequentially receiving a pipe member by sequentially forming a straddling cam surface gradually inclined toward the portion, and a pressure-resistant cam surface connected to the striking cam surface via an intermediate step portion. And an annular base that is inserted into the strangulation space and is slidable on the connection axis. While receiving the member, the annular base extends from the connection side end to the clamping end side, and the strangulation cam surface, the arc-shaped surface which comes into contact with the pressure-resistant cam surface and receives the cam action, and protrudes inward. A strapping member provided with a plurality of bendable straps having a locking surface for holding and locking the surface of the receiving pipe member, and a sliding range of each strapping piece in the strapping space portion. The following effects can be obtained because the apparatus is provided with the slide restricting means for restricting within the cam surface.

After releasing the locking of the restrained locking pin which has been pressed into the locking hole of the operating ring, the operation of the locking ring is performed by a simple operation of merely rotating the operating ring in the locking direction. The pin is actuated by the actuating cam means to straddle the connection end of the pipe member inserted into the connection space through the strangulation ring from the distal end side of the joint body, and at the same time, the restraining lock pin locks the operation ring. The strangulated state can be restrained and held by protruding into the hole, and the restraining locking pin protruding and locked into the locking hole of the operation ring can be pushed in against the elastic force, and the locked state can be maintained. After releasing the ring, the simple operation of rotating the operation ring circumferentially in the anti-stranding direction side allows the striking ring to be returned to release the strung state, thereby enabling the pipe member to be pulled out. Now, get the banding action of the banding ring The operation ring does not require any elastic pressure of a spring or the like, and the operation ring does not directly actuate the locking ring in response to each operation of the elastic locking and release of the restraining locking pin in the locking hole. Since the strapping operation is performed by the circumferential rotation operation, there is no fear that any malfunction will occur, and in addition, there is an excellent feature that the structure is relatively simple and can be easily implemented.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are a side view and an end view showing the appearance of a pipe member connecting plug device to which an embodiment of the present invention is applied.

FIGS. 2 (a), (b) and (c) are longitudinal sectional views, a left end view, and a main part of a central portion, which are taken out of the device of the embodiment and are shown in detail. It is a longitudinal cross-sectional view.

FIG. 3 is a longitudinal cross-sectional view of a central portion showing an upper half configuration in which a pipe member is connected and inserted into the apparatus of the embodiment.

FIG. 4 is a longitudinal cross-sectional view of a central portion showing an upper half configuration in which the inserted pipe members are strapped and connected.

FIG. 5 is a vertical sectional view of a central portion showing an upper half aspect when fluid pressure is applied to the connected and connected pipe members.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Connection plug main body 11 Mounting trunk 12 Mounting male thread 13 Hex head for screwing 14 Connection end face 15 Tightening trunk 16 Tightening male thread 17 Flow path 18 Butting step part 19 Insertion surface 20 Play step part 21 Strangulation space Part 22 Sliding inner peripheral surface 23 Holding peripheral groove 24 Seal ring 30 Tightening member 31 Tightening body part 32 Tightening hexagonal head 33 Tightening female thread 34 Play step part 35 Latch cam surface 36 Middle step part 37 Pressure-resistant cam surface 38 Insertion surface 40 Latching member 41 Annular base 42 Sliding outer peripheral surface 43 Restricting circumferential groove 44 Latching piece 45 Arc surface 46 Latching protrusion 47 Stop ring 50 Tube member 51 Connection end 52 End outer peripheral surface 53 Specific surface A connection Axis line B Cam working width of pressure-resistant cam surface (Sliding restriction range)

Claims (3)

(57) [Claims] 1. A connection plug device for a pipe member for inserting a connection end of a pipe member to be connected, connecting and connecting the connection ends in a strung state, and maintaining the connection, at least a connection axis line. A hollow cylindrical connection plug main body having a banding space inside thereof along the direction, and receiving a pipe member by threading one fastening screw at a connection end, and the one fastening at a fastening end side The other tightening screw threaded to the screw is screwed, and at least a locking cam surface that is gradually inclined from the tightening end toward the center, and an intermediate step portion between the locking cam surface and the locking cam surface. A hollow cylindrical fastening member for sequentially forming pressure-resistant cam surfaces connected to each other via a tube and receiving a pipe member, and an annular base portion which is inserted into the strangulated space and slidable on a connection axis. Receiving the tubular member and extending from the connection end of the annular base to the clamping end; Each of the tightening ends is formed with a strangulation cam surface, an arc surface which comes into contact with the pressure-resistant cam surface and receives a cam action, and an engagement surface which engages the surface of the pipe member which protrudes inward and receives. A strap member provided with a plurality of bendable straps, and a slide regulating means for regulating a sliding range of each strap within the strap space within the pressure-resistant cam surface. A connection plug device for a pipe member, characterized by: 2. The sliding restricting means is formed on one of sliding surfaces of a strangulation space of the connection plug main body and an annular base of a strangulation member inserted into the striation space. 2. A restricting peripheral groove having a width corresponding to a sliding range, and an engaging ring held in a retaining peripheral groove formed on the other side and capable of protrudingly engaging with the restricting peripheral groove. Connection plug device for pipe member. 3. A connecting ring main body is provided with a seal ring for sealing a surface of a tube member received through the tightening member and the banding member before the banding action is established, and protruding a receiving end of the tube member. The connecting stopper device for a pipe member according to claim 1, wherein a contact step portion is formed.