JP4744414B2 - Reinforcing tool and pipe connection structure using the same - Google Patents

Description

  The present invention relates to a reinforcing tool for reinforcing a pipe connecting portion for connecting a flexible pipe to a receiving port, and a pipe connecting structure using the same.

  As a conventional pipe connection structure, for example, the one shown in Patent Document 1 can be cited. That is, in the tube connection structure, a flexible tube having a corrugated shape is inserted and connected to the receiving port, and a stopper is attached across the receiving port and the flexible tube. The stopper has a split ring shape, and is provided with a receiving side latching claw and a flexible tube side latching claw on the inner periphery thereof. Then, the receiving-side locking claw is locked to a locking groove formed on the outer periphery of the receiving port, and the flexible tube-side locking claw is locked to the trough of the flexible tube. The flexible tube is prevented from coming out of the receiving port.

JP 2002-339424 A

However, in the above-described conventional pipe connection structure, if the receiving port for connecting the flexible tube is, for example, a collective receiving port arranged under the floor of the building, the flexible tube will come off from the receiving port. Such repairs require a great deal of effort, such as identifying a place that has fallen under a narrow and dark floor. For this reason, it has been desired to provide a further fail-safe structure for preventing the flexible tube from being removed by the structure in which the flexible tube is retained only by the stopper.
The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a reinforcing member capable of suppressing the flexible tube from being detached from the receiving port and a tube connection structure using the same.

  In order to solve the above-mentioned problem, the invention of the reinforcing tool according to claim 1 is characterized in that a flexible pipe having a corrugated shape is inserted and connected at a pipe connecting portion having a cylindrical receiving opening. The stopper is attached over the receiving port and the flexible tube, and the stopper is fixed to the receiving port, and the flexible tube is locked to the stopper. A reinforcing tool used in a pipe connection structure in which the flexible pipe is prevented from being pulled out from the receiving port by providing a locking structure, and is used by being attached to the stopper, and on the receiving side Further, a receiving-side flange and a flexible-tube-side flange are formed at both ends of the flexible tube, respectively, and the direction in which the flexible tube is inserted into the receiving port is defined as a connection direction, which is opposite to the connection direction. With the direction set as the extraction direction, the receiving-side flange is more than the receiving-side end surface of the stopping device when attached to the stopping device. Are arranged in the connection direction, the movable Shiwakan flange is summarized in that disposed in 該抜 exit direction side than the flexible tube side end surface of the 該止 Me tool.

  According to the above configuration, when the flexible tube is locked to the stopper fixed to the receiving port by the locking structure of the stopper, the flexible tube is first detached from the receiving port by the stopper. That has been suppressed. The reinforcing tool is attached to the stopper, and the receiving side flange is disposed on the connection direction side of the receiving side end surface of the stopper, and the flexible tube side flange is disposed on the flexible tube side of the stopper. It is comprised so that it may arrange | position in the extraction direction side rather than an end surface. If it is impossible to prevent the flexible tube from coming off with the stopper alone, the reinforcing member can be attached to the flexible tube side flange by the flange on the flexible tube side against an external force that causes the flexible tube to come off. The external force is absorbed and relaxed by receiving the flexible tube side end surface and withstanding the receiving side end surface of the stopper together with the receiving side flange. Therefore, the stopper has a first fail-safe structure for preventing the stopper, and the reinforcing member attached to the stopper maintains the locked state of the stopper with respect to the receiving port and the flexible tube. Thus, the flexible tube can be prevented from being detached from the receiving port by providing the second fail-safe structure for preventing the removal.

Further, in the invention according to claim 2, the invention of the reinforcing tool according to claim 1 is provided with a notch portion at a predetermined location, and the diameter of the notch portion can be expanded to be elastically expanded. It is desirable that the material is made of such a material and used by being attached to the stopper by fitting the stopper from the notch.
According to the above configuration, the notch portion of the reinforcing tool is pressed against the stopper, and the stopper is easily inserted into the stopper by fitting the stopper from the notch and attaching the stopper to the stopper. And it can attach simply.

Further, in the invention according to claim 3, the invention of the reinforcing tool according to claim 1 or claim 2 is that the receiving side flange, the flexible tube side flange, the receiving side flange, and the allowable side. It is desirable to provide the connection outer peripheral part which connects a flexible tube side flange partially.
According to the said structure, when a connection outer peripheral part is made partial, it can be discriminate | determined easily whether the reinforcing tool is reliably attached to the stopper.

Further, in the invention according to claim 4, the invention of the reinforcing tool according to any one of claims 1 to 3 projects in at least the flexible tube side flange in the extraction direction. It is desirable that ribs are formed.
When the rib is formed on the flexible tube side flange as in the above configuration, the strength against an external force that the flexible tube is about to come off is improved. In addition, it becomes easy to distinguish between the flange on the receiving end side and the flange on the flexible tube side, which is useful for preventing an error in the attaching direction of the reinforcing tool.

Further, in the invention according to claim 5, the invention of the reinforcing tool according to any one of claims 2 to 4 includes the receiving-side flange and the It is desirable that a cutout is formed in the flange on the flexible tube side.
According to the above configuration, since the notch is formed in the receiving side flange and the flexible tube side flange, the deformation at the position facing the notch is facilitated. Therefore, in the reinforcing tool, the width of the notch It becomes easy to expand the diameter elastically.

  Furthermore, in order to solve the above-described problem, the invention of the pipe connection structure according to claim 6 is characterized in that a flexible pipe having a corrugated shape is inserted in the pipe connection portion having a cylindrical reception opening. The stopper is connected across the receptacle and the flexible tube, and the stopper is fixed to the receptacle by a locking structure provided in the stopper, and the stopper is fixed to the stopper. By fastening the flexible tube so that the flexible tube does not come out of the receiving port, and further attaching the reinforcing tool according to any one of claims 1 to 5 to the stopper. The direction in which the flexible tube is inserted into the receiving port is the connecting direction, and the direction opposite to the connecting direction is the extracting direction, and the receiving side flange of the reinforcing tool is connected to the receiving side end surface of the stopper. Is also disposed on the connection direction side, and the flexible tube side flange of the reinforcing member is disposed on the extraction direction side of the flexible tube side end surface of the stopper. It is the gist of.

  The pipe connection structure according to the above configuration first has a fail-safe structure for preventing the stopper from coming off. If the stopper cannot be prevented from coming off with the stopper alone, the reinforcing tool is a flexible pipe. Locking the stopper to the receiving port and the flexible tube by receiving the end surface of the flexible tube on the side of the flexible tube and enduring the flange on the receiving side together with the end surface on the receiving side of the stopper By maintaining the above, a fail-safe structure for preventing the second from coming off is obtained. As described above, as a result of providing the two fail-safe structures for retaining the stopper and the reinforcing member, the flexible tube is prevented from being detached from the receiving port.

  Further, in the invention according to claim 7, in the invention of the pipe connection structure according to claim 6, the receiving port is arranged under the building floor and collects drainage from a plurality of drainage facilities of the building. On the other hand, it is desirable that it is a receptacle provided for connecting the flexible tube. The present invention is useful for connection to the flexible pipe used as a drain branch pipe from a drainage facility when it is frequently used in such a collective drainage facility from the viewpoint of improving the maintainability of the underfloor piping. is there.

  Further, in the invention according to claim 8, in the pipe connection structure according to claim 6 or 7, in the pipe connection structure, the reinforcing tool is rotatably attached to the stopper. Is desirable. When the reinforcing tool is rotatable with respect to the stopper, the external force exerted on the reinforcing tool in the circumferential direction can be absorbed by the rotation.

  According to the present invention, it is possible to improve the strength of the pipe connection portion, particularly the strength of retaining the outlet and the flexible tube.

Hereinafter, an embodiment in which the reinforcing tool and the pipe connection structure of the present invention are embodied in a pipe connection part of an indoor collective drainage facility will be described.
1 and 2, the corrugated flexible pipe joint 2 constituting the pipe connection structure of the present invention includes a flexible pipe 4 having a corrugated shape inserted into a synthetic resin receiving port 3 and then a fixing ring 5. It is deposited across the receiving port 3 and the flexible tube 4. The fixing ring 5 constitutes a stopper, and is fixed to the receptacle 3 as a locking structure of the stopper by screwing with a male screw 6 provided on the outer periphery of the receptacle 3. Is. The C ring 8 constitutes a stopper together with the fixed ring 5 and is fitted on the trough 7 of the flexible tube 4 in advance to serve as a fastening stopper for the fixed ring 5. The flexible tube 4 is locked as a locking structure of the tool.

  The receptacle 3 will be described. The receiving port 3 is disposed under the building floor and is provided to connect the flexible pipe 4 serving as an indoor drain pipe to collect the drainage from a plurality of drainage facilities of the building. . The receiving port 3 is formed in a cylindrical shape, and is provided with a receiving stopper 9 so as to have a predetermined receiving length. A male screw 6 is threaded on the outer peripheral surface of the receiving port 3.

  The flexible tube 4 will be described. The flexible tube 4 is an annular corrugated flexible tube, and has a corrugated shape with the inner surface being a flat surface and the outer surface being a wave surface. The flexible tube 4 is appropriately cut according to a desired length, and a seal ring 11 is fitted over the valley 7 near the cut tube end 10 to seal the pipe joint. It is said. A seal ring with a lip is used as the seal ring 11, and the seal is performed while absorbing backlash with the receiving port 3.

  The fixing ring 5 will be described. The fixing ring 5 is made of synthetic resin and is threaded into the external thread 6 on the outer periphery of the receiving port 3. A female thread 14 is threaded on the inner peripheral surface of the fixing ring 5. The fixing ring 5 is provided with a throttle portion 12 in the shape of a cap nut at the rear end of the screw (see FIG. 2). In other words, the fixing ring 5 has a substantially cap nut shape. The constricted portion 12 abuts the C-ring 8 that is fitted in advance in the valley 7 slightly outside the length of the receiving port after insertion of the flexible tube, so that the C-ring 8 is affixed by a fastening stopper (by screwing). It is made to function as a contact and screwing). Therefore, the opening diameter of the throttle portion 12 is smaller than the outer diameter of the attached C-ring 8. The C-ring 8 is provided with a thin flange 13 projecting on the outer peripheral surface thereof in order to bring the throttle portion 12 into contact with the C-ring 8 with certainty. The thin flange 13 does not necessarily have a flange shape (annular or arc shape), and may have a star shape.

  In the fixing ring 5, the female screw 14 is fixed to the receiving port 3 by screwing with the male screw 6 of the receiving port 3. A gripping knurl 15 is processed on the outer periphery of the fixing ring 5. Of course, instead of the knurl 15, six spanner hooks may be provided. In addition, a large number of protrusions 16 are provided on the rear end surface of the fixing ring 5 so as to give rigidity to the fixing ring 5 made of synthetic resin.

The C ring 8 will be described. The C ring 8 includes a ring main body 8A formed by bending a long plate body having a rectangular cross section into an annular shape, and thin flanges 13 and 13 are integrally injection-molded on both side surfaces in the axial direction of the ring main body 8A. The ring body 8A is provided with a notch at a predetermined location in order to fit the C ring 8 to the outer surface of the flexible tube 4.
In a state where the C-ring 8 is attached to the flexible tube 4, the ring body 8A is closely fitted into the valley 7 of the flexible tube 4, and the thin flange 13 is straddled across the top surfaces of the two peaks. It has become.

  The C-ring 8 engages the flexible tube 4 by fitting the ring body 8A into the valley 7 of the flexible tube 4 and bringing the thin flange 13 into contact with the throttle portion 12 of the fixed ring 5. Yes. That is, the C-ring 8 that is a tightening stopper ensures that the thin flange 13 is brought into contact with the inner surface of the throttle portion 12 of the fixing ring 5 when the fixing ring 5 is tightened (see FIG. 2). Accordingly, the direction in which the flexible tube 4 is inserted into the receiving port 3 (left direction in FIGS. 1 and 2) is the connection direction, and the opposite direction (right direction in FIGS. 1 and 2) is the connection direction. In the extraction direction, the C-ring 8 is received by the flexible tube 4 by locking the ring body 8A to the trough 7 of the flexible tube 4 and contacting the narrow flange 13 to the throttle portion 12. The movement in the extraction direction with respect to the port 3 is restricted so that the flexible tube 4 does not come off from the receiving port 3.

  The notch length of the ring main body 8A is in a range of approximately 90 ° when viewed from the entire 360 ° ring, that is, a range that is approximately 1/4 of the ring main body 8A. Therefore, when the C-ring 8 is elastically attached to the trough 7 of the flexible tube 4, the ring body 8 is on the trough side, and the two crest surfaces adjacent to the thin flange 13 (the crest surfaces of both crests relative to the trough). ), The fixing ring 5 will not come off even if there is a large notch. And since the outer peripheral part of one flange 13 is exposed from the fixing ring 5, the mounting | wearing attitude | position of C ring 8 can be confirmed.

Next, the reinforcing tool used for the pipe connection structure 2 will be described.
3A is a view of the reinforcing member 17 viewed from the receiving port 3 side, FIG. 3B is a view of the reinforcing member 17 viewed from the flexible tube 4 side, and FIG. 3C is a reinforcing member. It is the figure which looked at the tool 17 from the side.
The reinforcing tool 17 is formed in a substantially C-ring shape having a notch 18 at a predetermined location (lower position in FIGS. 3A and 3B) as an overall shape. That is, the reinforcing member 17 has a receiving end flange 19A formed at the receiving end 3 end portion, a flexible tube side flange 19B formed at the flexible tube 4 end portion, and the receiving end flange 19A. And a flexible outer peripheral portion 20 that partially connects the flexible tube side flange 19B.
In addition, the reinforcing member 17 is formed of a material that can be elastically expanded through the notch 18, and if such a material is used, a thermoplastic resin such as polypropylene (PP), Any of polyethylene (PE), polyvinyl chloride (PVC), polycarbonate (PC) and the like may be used. The reinforcing tool 17 is elastically expanded through the notch 18 and is used by being attached to the fixing ring 5 as a stopper (see FIG. 4).

On the other hand, a notch 21 is formed in each of the receiving side flange 19A and the flexible tube side flange 19B at a position facing the notch 18. The notch 21, together with the notch 18, facilitates the elastic diameter expansion of the reinforcing tool 17 when attached to the fixing ring 5. It is to be noted that the receiving-side flange 19A and the flexible tube-side flange 19B are partially connected by the connecting outer peripheral portion 20 and the space 20A is provided in the peripheral wall of the reinforcing member 17, so that the elastic force of the reinforcing member 17 is also increased. This contributes to easy enlargement of the diameter.
Furthermore, a plurality of ribs 22 are formed in the radial direction on the flexible tube side flange 19B. These ribs 22 improve the strength of the reinforcing member 17 against the pulling force of the flexible tube 4 from the receiving port 3. These ribs 22 also have a function of discriminating between the flexible tube side flange 19B and the receiving side flange 19A, and are useful for preventing errors in the direction in which the reinforcing member 17 is attached.
In addition, the receiving side flange 19 </ b> A and the flexible tube side flange 19 </ b> B have different widths depending on the difference in diameter between the receiving port 3 and the flexible tube 4. That is, the flexible tube 4 has a smaller diameter than the receiving port 3, and the receiving side flange 19A is correspondingly narrower than the flexible tube side flange 19B. Therefore, as compared with the case where the receiving-side flange 19A and the flexible tube-side flange 19B have the same width, it is possible to prevent rattling of the reinforcing tool 17 during attachment and to attach the reinforcing tool 17 stably. It has become. The difference in the width between the receiving side flange 19A and the flexible tube side flange 19B contributes to the unambiguous determination of the direction in which the reinforcing member 17 is attached. Never get lost in the direction.

  As described above, the reinforcing member 17 is used by being attached to the fixing ring 5 so as to accommodate the fixing ring 5 therein while expanding the diameter via the notch 18. As shown in FIG. 4, in a state where the reinforcing member 17 is attached to the fixing ring 5, the reinforcing member 17 connects the receiving side flange 19 </ b> A to the connecting direction side of the receiving side end surface of the fixing ring 5 (in FIG. 4). The flexible tube side flange 19B is disposed on the side of the extraction direction of the fixing ring 5 (on the right side in FIG. 4). The receiving side flange 19 </ b> A is in contact with the receiving side end surface of the fixing ring 5, and the flexible tube side flange 19 </ b> B is in contact with the flexible tube side end surface of the fixing ring 5.

If it is within normal assumptions, the flexible tube 4 can be prevented from coming off from the receiving port 3 by the locking structure by the fixing ring 5 and the C ring 8 which is a fail-safe structure for the first retaining. . However, when an unexpected external force such as an earthquake or other natural disaster or excessive drainage is applied to the fixing ring 5 and the C ring 8, the fixing ring 5 may be deformed or damaged. There is. In such a case, the reinforcing member 17 receives the flexible tube side flange 19B while receiving the flexible tube side end surface (the outer surface of the throttle portion 12) of the fixing ring 5 together with the receiving side end surface of the fixing ring 5. Withstands external force at the mouth side flange 19A. In other words, when the fixing ring 5 and the C ring 8 alone cannot resist the external force to which the flexible tube 4 is to come off, the reinforcing member 17 is connected to the fixing ring by the receiving side flange 19A and the flexible tube side flange 19B. Both the receiving side end face and the flexible tube side end face of 5 are restrained, and the fixing ring 5 is held in place. As a result, the reinforcing member 17 functions as a fail-safe structure for the second retaining after the fixing ring 5 and the C ring 8 that are stoppers, so that the flexible tube 4 comes out of the receiving port 3. To prevent.
On the other hand, the reinforcing member 17 is not fixed to the fixing ring 5 but is rotatably attached. For this reason, when the external force as mentioned above is exerted on the reinforcing member 17 in the circumferential direction of the reinforcing member 17, the reinforcing member 17 rotates and absorbs the external force. In addition, with respect to the external force exerted from the normal line direction of the reinforcing member 17, the reinforcing member 17 disperses the external force to the fixing ring 5 via the receiving side flange 19A or the flexible tube side flange 19B. Withstand the external force.

  The present invention is not limited in any way by the above-described embodiment, and the fail-safe structure for preventing the first slip is fixed, for example, if the flexible tube 4 can be prevented from coming off from the receiving port 3. Instead of the stopper made of the ring 5 and the C ring 8, a stopper made of a split ring may be used. That is, a stopper made of a split ring is used as the fail-safe structure for the first retaining, and the reinforcing member 17 that can be attached to the split ring is adopted as the fail-safe structure for the second retaining. May be. It is also possible to improve the strength by directly attaching the reinforcing member 7 without removing the pipe from the pipe connection structure already installed. Further, the reinforcing member 17 does not necessarily have both the receiving side flange 19A and the flexible tube side flange 19B in contact with the fixing ring 5 at the time of attachment. If both the receiving side end surface and the flexible tube side end surface of the fixing ring 5 can be restrained by the 19A and the flexible tube side flange 19B, either one of them may be brought into contact with each other, or both may be attached to the fixing ring 5 You may arrange | position so that it may not contact | abut. The ribs 22 may be omitted, and may be provided on the receiving side flange 19A.

  Since this invention can raise the intensity | strength of a drainage equipment connection structure very easily, it can utilize industrially.

Sectional drawing which shows a pipe connection structure. Cross-sectional view of pipe connection structure (A), (b) is a front view of a reinforcement tool, (c) is a side view of a reinforcement tool. Sectional drawing which shows the state which attached the reinforcement tool.

Explanation of symbols

3 Receiving port 4 Flexible tube 5 Fixing ring 8 C ring 17 Reinforcing tool

Claims (8)

At the tube connection portion having a cylindrical receiving port, a flexible tube having a corrugated shape is inserted and connected to the receiving port, and a stopper is attached across the receiving port and the flexible tube. The stopper is provided with a locking structure for fixing the stopper to the receiving port and locking the flexible tube to the stopper, so that the flexible tube cannot be removed from the receiving port. A reinforcing tool used in the pipe connection structure,
It is used by being attached to the stopper, and at both ends of the receiving side and the flexible tube side, a receiving side flange and a flexible tube side flange are respectively formed.
The direction in which the flexible tube is inserted into the receiving port is the connection direction, and the direction opposite to the connection direction is the extraction direction.
In the state of being attached to the stopper, the receiving-side flange is disposed on the connection direction side of the receiving-side end surface of the stopper, and the flexible tube-side flange is a flexible member of the stopper. A reinforcing tool, which is disposed on the side in the extraction direction from the end surface on the tube side. A notch is provided at a predetermined location, the notch is formed from a material that can be elastically expanded by expanding the width of the notch, and the stopper is fitted by inserting the stop from the notch The reinforcing tool according to claim 1, wherein the reinforcing tool is used by being attached to a metal. The reinforcement according to claim 1, further comprising: the receiving-side flange, the flexible tube-side flange, and a connecting outer peripheral portion that partially connects the receiving-side flange and the flexible tube-side flange. Ingredients. The reinforcing tool according to any one of claims 1 to 3, wherein a rib projecting in the extraction direction is formed on at least the flexible tube side flange. The reinforcement of the pipe connecting part according to any one of claims 2 to 4, wherein a notch is formed in the receiving side flange and the flexible pipe side flange at a position facing the notch part. Ingredients. In a pipe connection portion having a cylindrical receiving port, a flexible tube having a corrugated shape is inserted and connected to the receiving port, and a stopper is attached across the receiving port and the flexible tube. By fixing the stopper to the receiving port with a locking structure provided on the stopper, the flexible tube is locked to the stopper so that the flexible tube cannot be removed from the receiving port. Further, by attaching the reinforcing tool according to any one of claims 1 to 5 to the stopper, a direction in which the flexible tube is inserted into the receiving port is defined as a connecting direction, and the connecting direction. The receiving side flange of the reinforcing tool is disposed closer to the connecting direction side than the receiving side end surface of the stopper, and the flexible tube side flange of the reinforcing tool is connected to the stopper. A pipe connection structure characterized in that the pipe connection structure is arranged on the side in the extraction direction from the end face of the flexible pipe. 7. The receptacle according to claim 6, wherein the receptacle is a receptacle provided to connect the flexible pipe to an aggregate which is disposed under the building floor and collects drainage from a plurality of drainage facilities of the building. Pipe connection structure. The pipe connection structure according to claim 6 or 7, wherein the reinforcing member is rotatably attached to the stopper.

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