JP2012041957A - Pipe coupling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe coupling device capable of firmly attaching a water stop member to an outer circumferential face of a fluid pipe with sufficient force.SOLUTION: The pipe coupling device 1 water-tightly connects a socket pipe 3 and a fluid pipe 2 by pressing a wedge 6 by pressing means 3b, 4, 8 to reduce an inner diameter dimension of a ring body 5 in accordance with an outer diameter of the fluid pipe 2. Each wedge 6 linearly moves toward a pipe axis C by being pressed by the pressing means 3b, 4, 8. The force of the pressing means 3b, 4, 8 to move the wedge 6 to the pipe axis C is controlled to be sufficient to firmly attach a water stop member 7 to the outer circumferential face 2a of the fluid pipe.

Description

  The present invention relates to a pipe coupling device that reduces the inner diameter of a ring body in accordance with the outer diameter of a fluid pipe by pressing a wedge body by a pressing means, and connects a receiving pipe and a fluid pipe having a different diameter in a watertight manner. About.

  A conventional pipe coupling device is arranged by connecting a sleeve part (receiving part) having an insertion end for inserting a tube (fluid pipe) in the circumferential direction of the sleeve part, and an annular closing ring (ring body) A plurality of wedge-shaped elements (wedge bodies) forming a pressure member, pressure means for pressing each element against a tube inserted in the sleeve portion, and between the sleeve portion and the closing ring and between the tube and the closing ring A rubber ring (water stop member), and each element is pressed against the tube by pressure means (pressing means) to rotate each element in the circumferential direction to reduce the diameter of the closing ring, There is one in which a rubber ring is brought into contact with the outer peripheral surface of the tube, and the tube and the sleeve portion are connected in a state where the sleeve and the closing ring and the tube and the closing ring are sealed (for example, See Patent Document 1).

Japanese Patent No. 3940458 (page 4, FIG. 1)

  However, in the pipe coupling device described in Patent Document 1, when each element (wedge body) is pressed by pressure means (pressing means) in order to reduce the diameter of the closing ring (ring body), each element is circumferentially moved. Since the rotation means, part of the force that the pressure means presses each element is used to rotate the element, so the rubber ring is used when the rubber ring (water stop member) is brought into contact with the outer peripheral surface of the tube. There is a problem that it is not possible to obtain a force for sufficiently adhering to the outer peripheral surface of the tube.

  The present invention has been made paying attention to such problems, and an object of the present invention is to provide a pipe coupling device capable of bringing a water-stopping member into close contact with an outer peripheral surface of a fluid pipe with a sufficient force.

In order to solve the above-mentioned problem, the pipe coupling device of the present invention is
A receiving tube having a receiving portion into which a fluid tube can be inserted and a distal end portion of the receiving portion, and a circumferential width dimension gradually becomes shorter toward the tube axis of the receiving tube. A ring body which is formed by connecting a plurality of wedge bodies formed in the circumferential direction and which can expand and contract an inner diameter, and between the ring body and the receiving portion, and an outer peripheral surface of the ring body and the fluid pipe An annular water-stopping member that seals the space between the two and a pressing means that presses each wedge body toward the tube axis of the receiving pipe, and the wedge body is pressed by the pressing means. A pipe coupling device that reduces the inner diameter of the ring body in accordance with the outer diameter of the fluid pipe and connects the receiving pipe and the fluid pipe in a watertight manner,
Each wedge body is linearly moved toward the tube axis by being pressed by the pressing means.
According to this feature, there is no component facing the circumferential direction of the ring body in the force applied from the pressing means to each wedge body, so the force that causes the pressing means to move the wedge body toward the tube axis The water stop member can be large enough to be in close contact with the outer peripheral surface of the tube, and the water stop member is not twisted by the force acting on the water stop member in the circumferential direction of the ring body. It is possible to prevent the deterioration of the water from being accelerated.

The pipe coupling device of the present invention comprises:
Each wedge body is provided with a connecting portion projecting toward one side in the circumferential direction of the ring body, and recessed on the other side in the circumferential direction of the ring body. And a connected portion that can be loosely fitted in the circumferential direction.
According to this feature, each wedge body is pressed by the pressing means, and the ring body is reduced in diameter in the connected portion while the connecting portion moves accurately along the connected portion toward the tube axis. Thus, the difference in circumference of the outer peripheral surface of the ring body can be absorbed without interfering with each other.

The pipe coupling device of the present invention comprises:
Each wedge body is formed so that a width dimension in the tube axis direction becomes gradually longer toward the tube axis, and the pressing means includes the wedge body and a distal end portion of the receiving portion. It is characterized by pinching in the direction of the tube axis.
According to this feature, the wedge body converts a part of the force received from the pressing unit into a force directed to the tube axis depending on the shape thereof, and moves toward the tube axis, and a part of the force received from the pressing unit. The water stopping member can be used as a force for maintaining the sealing between the wedge body and the receiving portion.

It is a disassembled side view which shows the pipe | tube coupling device in an Example. (A) is a front view of the wedge body, (b) is a side view of the wedge body, and (c) is a plan view of the wedge body. It is a perspective view which shows the connection of a wedge body. (A) is a front view which shows a ring body, (b) is an enlarged view which shows the outer peripheral surface of a ring body. It is a cross-sectional side view which shows the state by which the fluid pipe was inserted in the receiving part. (A) is a front view which shows the ring body in FIG. 5, (b) is an enlarged view which shows the outer peripheral surface of the ring body in FIG.

  EMBODIMENT OF THE INVENTION The form for implementing the pipe | tube coupling device which concerns on this invention is demonstrated below based on an Example.

  A pipe coupling device according to an embodiment will be described with reference to FIGS. 1 to 6. Hereinafter, the left side of FIG. 1 and FIG. 5 is the front side (front side) of the pipe coupling device, and the left and right sides of FIG. 2A and the upper and lower sides of FIG. It demonstrates as a right-and-left side of a wedge body. As shown in FIG. 1, the pipe | tube coupling | bonding apparatus 1 in a present Example is an apparatus which can connect the fluid pipe | tube 2 (refer FIG. 5) for waterworks watertightly, for example.

  As shown in FIGS. 1 and 5, the pipe coupling device 1 includes a receiving pipe 3 having a receiving part 3 a formed with an inner diameter larger than the outer diameter of the fluid pipe 2 so that the fluid pipe 2 can be inserted. It has. A flange 3b is formed at the distal end of the receiving port 3a so as to protrude in the diameter increasing direction over the entire circumference of the receiving tube 3, and the inner diameter side of the flange 3b is the receiving tube 3 of the fluid tube 2. It is formed in the taper surface 3c which inclines toward the insertion direction with respect to.

  On the other hand, on the front side of the flange 3b, an annular push ring 4 having substantially the same outer diameter and inner diameter as the flange 3b is disposed oppositely, and the inner diameter side of the push ring 4 is separated from the receiving pipe 3 of the fluid pipe 2. It is formed on a tapered surface 4a that inclines toward the direction.

  Between the flange 3b and the pusher wheel 4, there is an inner diameter through which the fluid pipe 2 can be inserted, and the ring body 5 that can change the inner diameter dimension by expanding and contracting in the radial direction, and the fluid pipe 2 and the receiving ring 4. A water stop member 7 that seals the space between the outer peripheral surface 2a of the fluid pipe 2 and the inner peripheral surface of the receiving pipe 3 in a watertight manner when connecting the mouth pipe 3 is disposed. Means that the ring body 5 and the water stop member 7 are sandwiched between the taper surfaces 3c and 4a by tightening a plurality of locations on the outer peripheral side with bolts and nuts 8 in the direction of the tube axis C.

  Next, the configuration of the ring body 5 will be described in detail. As shown in FIGS. 2 (a), 3 and 4 (a), the ring body 5 has a wedge formed so that the width in the circumferential direction becomes gradually shorter toward the tube axis C in front view. A plurality of bodies 6 are connected in the circumferential direction.

  As shown in FIGS. 2B and 5, the front side of the wedge body 6 is formed with a tapered surface 6 a that gradually inclines toward the direction of detachment of the fluid pipe 2 from the receiving pipe 3 as it approaches the pipe axis C. At the same time, the back surface side of the wedge body 6 is formed with a tapered surface 6b that is gradually inclined toward the insertion direction of the fluid pipe 2 with respect to the receiving pipe 3 as it approaches the pipe axis C. That is, the front-rear width dimension of the wedge body 6 of this embodiment is formed so as to become longer as it approaches the tube axis C.

  Further, as shown in FIGS. 2C and 3, a protrusion 6c that protrudes leftward along the tapered surface 6b is formed at the left end of the wedge body 6 on which the tapered surface 6b is formed. A notch 6d is formed at the right end of the back side of the wedge body 6 where the protrusion 6c of the adjacent wedge body 6 is disposed.

  In addition, a ridge 6e as a connecting portion in the present invention projects in the circumferential direction of the ring body 5 at the approximate center of the right side surface of the wedge body 6 in the tube axis C direction. In addition, the protrusion part 6f which protrudes toward the front-back width direction of the wedge body 6 is formed in the front-end | tip part of this protrusion 6e. For this reason, the protrusion 6e has a substantially T shape in plan view.

  On the other hand, at the center of the left side of the wedge body 6 facing the circumferential direction of the ring body 5 in the tube axis C direction, the protrusion 6f of the protrusion 6e of the adjacent wedge body 6 is inserted from the diameter expansion direction of the ring body 5. A storage groove 6g as a connected portion in the present invention is recessed.

  The width dimension of the storage groove 6g in the left-right direction is longer than the width dimension of the protrusion 6f in the left-right direction, and both ends of the storage groove 6g in the front-rear direction are formed at the opening of the storage groove 6g. Locking pieces 6h, 6h are formed to project from the portion toward the center of the storage groove 6g in the front-rear direction. For this reason, the protrusion 6f inserted into the storage groove 6g of the adjacent wedge body 6 cannot be detached from the storage groove 6g in the circumferential direction of the ring body 5 by contacting the locking pieces 6h, 6h in the storage groove 6g. And is loosely fitted so as to be movable along the left-right direction.

  As shown in FIGS. 2B and 5, the wedge body 6 on the inner peripheral side of the ring body 5 has a wedge body on the back side of the wedge body 6 with respect to the protrusion 6 e and the storage groove 6 g. A fitting groove 6j that opens toward the tube axis C is formed over the entire length in the left-right width direction.

  As shown in FIGS. 3 and 4 (a), the wedge body 6 configured as described above is arranged such that a plurality of protrusions 6f of the protrusions 6e are inserted into the storage grooves 6g of the adjacent wedge bodies 6, The ring body 5 is configured as described above. As shown in FIGS. 4 (a) and 4 (b), the ring body 5 has a right side surface and a left side surface between adjacent wedge bodies 6 and 6 in a state where the diameter is maximum. A gap 9 is formed therebetween, and each protrusion 6f is in contact with each locking piece 6h in each storage groove 6g.

  Further, the fitting grooves 6j of each wedge body 6 are arranged on the same circumference by the plurality of wedge bodies 6 constituting the ring body 5, so that the water stop member 7 is inserted into the fitting grooves 6j. One end of the water stop member 7 is fitted over the entire inner circumference of the ring body 5, and the ring body 5 is covered with the back surface side and the tapered surface 6 b with respect to the fitting groove 6 j in the inner circumference of the ring body 5. It is attached. Hereinafter, the part which covers the inner peripheral side of the ring body 5 of the water stop member 7 will be described as the inner peripheral part 7a, and the part which covers the tapered surface 6b will be described as the tapered part 7b.

  As shown in FIGS. 1 and 5, the water stop member 7 is disposed between the ring body 5 and the flange 3 b and the pusher wheel 4, and the flange 3 b and the pusher wheel 4 are tightened in the direction of the tube axis C by bolts and nuts 8. As a result, the tapered portion 7b is elastically deformed between the tapered surfaces 3c and 6b, and the space between the ring body 5 and the receiving portion 3a is kept watertight. At this time, the tapered surface 4a is in contact with the tapered surface 6a over substantially the entire surface.

  Next, connection of the fluid pipe 2 inserted into the receiving port 3a will be described. First, as shown in FIG. 5, the distal end portion of the fluid pipe 2 is inserted through the inner side of the push ring 4, the ring body 5, and the water stop member 7, and is inserted into the receiving portion 3 a by a predetermined distance. From this state, the presser wheel 4 and the flange 3b are further tightened in the direction of the pipe axis C by the bolts and nuts 8 so that the wedge bodies 6 are clamped by the tapered surfaces 3c and 4a.

  For this reason, each wedge body 6 moves linearly toward the tube axis C by receiving the force received from the pusher wheel 4 and the flange 3b by the tapered surfaces 6a and 4a. At the same time, in the water stop member 7, the taper portion 7 b is further pinched between the ring body 5 and the flange 3 b by the force with which the push ring 4 presses the wedge body 6 in the direction of insertion of the fluid pipe 2 that is the pipe axis C direction. In this way, the space between the ring body 5 and the flange 3b is kept stronger. That is, the pusher wheel 4, the flange 3b, and the bolt / nut 8 in the present embodiment constitute the pressing means in the present invention.

  On the other hand, the inner peripheral portion 7a of the water stop member 7 is elastically deformed between the outer peripheral surface 2a of the fluid pipe 2 and each wedge body 6 as each wedge body 6 moves toward the tube axis C, and the fluid pipe 2 is in close contact with the outer peripheral surface 2a. Thereby, between the inner peripheral side of the ring body 5 and the outer peripheral surface 2a of the fluid pipe 2 is kept watertight over the entire circumference in the circumferential direction, and the fluid pipe 2 and the receiving pipe 3 are connected in a watertight manner. The

  In the ring body 5 in which the fluid pipe 2 and the receiving pipe 3 are connected in a watertight manner, each wedge body 6 is connected to the pipe axis C as shown in FIGS. 6 (a) and 6 (b). 4a, the diameter is reduced as compared with the maximum diameter shown in FIG. 4A, and the right side surface and the left side surface between the adjacent wedge bodies 6 and 6 are in contact with each other without a gap. Each projecting portion 6f comes into contact with a side wall of each housing groove 6g facing the opening of the housing groove 6g.

  As described above, the protrusions 6f of the wedge bodies 6 are inserted into the storage grooves 6g of the adjacent wedge bodies 6 so that the protrusions 6c are disposed in contact with the notches 6d of the adjacent wedge bodies 6. Each protrusion 6c pressed by the water stop member 7 constantly presses the notch 6d of the adjacent wedge body 6, thereby supporting the water stop member 7 without causing the shape of the ring body 5 to collapse in the direction of the tube axis C. It is supposed to be. Further, as described above, the protrusions 6 c are arranged in contact with the notches 6 d of the adjacent wedge bodies 6, so that the gaps 9 between the wedge bodies 6 are non-linearly or circumferentially extending from the front to the back of the ring body 5. Since it is formed so as to be displaced in the direction, it is difficult for fluid to flow along the gap 9, and the water stop member 7 makes contact with the tapered surface 3 c of the receiving port 3 a and the outer peripheral surface 2 a of the fluid pipe 2. The sealing performance between them can be maintained.

  As described above, in the pipe coupling device 1 according to the present embodiment, each wedge body 6 moves linearly toward the pipe axis C by being pressed by the pusher wheel 4 and the flange 3b. Since there is no component facing the circumferential direction of the ring body 5 from the force applied to each wedge body 6 from 3b, the force that causes the pusher wheel 4 and the flange 3b to move the wedge body 6 toward the tube axis C The water stop member 7 can be sufficiently large to be in close contact with the outer peripheral surface 2 a of the fluid pipe 1, and a twisting force is applied to the water stop member 7 due to a force acting on the water stop member 7 in the circumferential direction of the ring body 5. Therefore, it is possible to prevent deterioration of the water stop member 7 from being accelerated.

  Each wedge body 6 has a protrusion 6e that protrudes toward one side in the circumferential direction of the ring body 5, and a protrusion 6e that is recessed on the other side in the circumferential direction of the ring body 5 and that is adjacent to the wedge body 6. And a storage groove 6g that can be loosely fitted in the circumferential direction of the ring body 5, so that each wedge body 6 is pressed by the pusher wheel 4 and the flange 3b, so that the protrusions 6e of the respective wedges 6e become storage grooves 6g. While accurately moving along the tube axis C, the difference in circumference of the outer peripheral surface of the ring body 5 caused by the diameter reduction of the ring body 5 in the storage groove 6g can be absorbed without interfering with each other. it can.

  Each wedge body 6 is formed so that the width dimension in the tube axis C direction becomes gradually longer toward the tube axis C, and the pusher wheel 4 and the flange 3b connect each wedge body 6 to the receiving portion. The wedge body 6 converts a part of the force received from the pusher wheel 4 and the flange 3b into a force directed to the tube axis C depending on the shape of the wedge body 6 because it is clamped in the direction of the tube axis C with the tip of 3a. The water stop member 7 uses a part of the force received from the push ring 4 and the flange 3b as a force for maintaining the sealing between the wedge body 6 and the receiving portion 3a. can do.

  Although not particularly illustrated, when the outer diameter of the fluid pipe 2 inserted into the receiving port 3 a is relatively small within the range in which the ring body 5 can be reduced, each wedge body 6 is reduced due to the reduced diameter of the ring body 5. A slight surplus may occur in the circumferential direction of the water stop member 7 in contact with the water stop member 7, but the surplus part of the water stop member 7 is a relatively large gap generated between the inner surface of the receiving port 3a and the outer surface of the fluid pipe 2. The water stoppage by the waterstop member 7 can be maintained by using this to escape into the gap.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above embodiment, the fluid pipe 2 is used for water supply, but the fluid flowing in the fluid pipe 2 may be water other than water, such as petroleum, or a mixture of liquid and gas. There may be.

  Moreover, in the said Example, although the pipe | tube coupling device 1 was provided in the receiving pipe 3 for inserting the fluid pipe | tube 1, the pipe | tube coupling apparatus 1 of a present Example is provided in the both ends of a receiving pipe, and a receiving port is provided. You may comprise a pipe | tube as a pipe joint for connecting the fluid pipe | tube of a different diameter.

DESCRIPTION OF SYMBOLS 1 Pipe coupling device 2 Fluid pipe 2a Outer peripheral surface 3 Receptacle pipe 3a Receptacle part 3b Flange (pressing means)
3c Tapered surface 4 Press wheel (pressing means)
4a taper surface 5 ring body 6 wedge bodies 6a, 6b taper surface 6e ridge (connecting portion)
6f Protruding part 6g Storage groove (connected part)
6h Locking piece 7 Water-stopping member 7a Inner peripheral part 7b Taper part 8 Bolt / nut (pressing means)

Claims (3)

A receiving tube having a receiving portion into which a fluid tube can be inserted and a distal end portion of the receiving portion, and a circumferential width dimension gradually becomes shorter toward the tube axis of the receiving tube. A ring body which is formed by connecting a plurality of wedge bodies formed in the circumferential direction and which can expand and contract an inner diameter, and between the ring body and the receiving portion, and an outer peripheral surface of the ring body and the fluid pipe An annular water-stopping member that seals the space between the two and a pressing means that presses each wedge body toward the tube axis of the receiving pipe, and the wedge body is pressed by the pressing means. A pipe coupling device that reduces the inner diameter of the ring body in accordance with the outer diameter of the fluid pipe and connects the receiving pipe and the fluid pipe in a watertight manner,
Each said wedge body moves linearly toward the said tube axis by being pressed by the said press means, The pipe | tube coupling device characterized by the above-mentioned.   Each wedge body is provided with a connecting portion projecting toward one side in the circumferential direction of the ring body, and recessed on the other side in the circumferential direction of the ring body. The pipe coupling device according to claim 1, further comprising a coupled portion that can be loosely fitted in the circumferential direction.   Each wedge body is formed so that a width dimension in the tube axis direction becomes gradually longer toward the tube axis, and the pressing means includes the wedge body and a distal end portion of the receiving portion. The tube coupling device according to claim 1, wherein the pressure is clamped in the direction of the tube axis.

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