JP6051470B2 - Detachment prevention pipe joint structure provided on concrete pipe and concrete pipe connected using the same - Google Patents

Description

  The present invention relates to a detachment prevention pipe joint provided on a concrete pipe and a concrete pipe connected using this joint.

  A cylindrical collar member protrudes from the end face and is fixed to the outer periphery of the end of one propulsion pipe connected to each other, and the collar member and the spigot are hermetically sealed with an annular seal member made of an elastic material. The water is stopped. Moreover, in the connection part where such a water stop structure is adopted, a detachment prevention device is attached so that both propulsion pipes do not detach.

  Patent Document 1 describes a device using a turnbuckle connected like a chain as the separation preventing device.

  Patent Document 2 embeds one joint in which a plurality of rods having locking heads on the end face of the joint project, and a locking mechanism that inserts and locks each rod on the other end face of the joint. Describes a device for preventing separation.

  Patent Document 3 describes an apparatus in which both concrete pipes are prevented from detaching by holding a flange connected to a spigot part of a concrete pipe with a steel ring attached to a socket part of the other concrete pipe. ing.

  Patent Document 4 describes a joint structure in which a rubber ring and a stopper ridge are attached to a collar provided on a concrete pipe, and a movable pin is installed on the other concrete pipe and locked with a stopper ridge. .

Japanese Utility Model Publication No. 50-15233 Japanese Patent Publication No. 03-055715 JP 09-32982 A JP-A-8-333895

  In the joint structure of concrete pipe, it is necessary to prevent the joint from being detached when the concrete pipe moves in the case of ground displacement due to earthquake or ground subsidence such as non-uniform settlement (hereinafter referred to as earthquake or ground displacement). Desired. In addition, such a joint structure of a concrete pipe may be required not to protrude from the outer diameter of the concrete pipe, and furthermore, it is possible to facilitate the alignment by facilitating the positioning of both concrete pipes. Desired.

  In the structure described in Patent Document 1 or Patent Document 2, it is necessary to rotate the pipe in order to complete the separation preventing device, and it is not easy to rotate the heavy concrete pipe.

  In the thing of the structure described in patent document 3, it cannot use for the propulsion pipe from which the exterior of a concrete pipe becomes a natural ground.

  In the structure described in Patent Document 4, the rubber ring is attached to the collar, and when the rubber ring is attached to the collar and a barb is formed to lock it, the spigot is notched. The minimum spigot thickness is reduced, the tube load-carrying force transmitting axial propulsive force is reduced, and the spigot moves out of the collar in the direction of movement. There was a limit on the distance tolerance when operating.

  In view of such points, the present invention does not require a rubber ring as a water-stopping member to be attached to the collar member, and is disposed on the inside of the collar member, thereby simplifying construction, curve laying, earthquake or It aims at providing the detachment prevention joint structure provided in the concrete pipe which can follow the displacement of the ground.

The present invention is attached to a concrete pipe, and extend into the concrete pipe longitudinally inserted for bonding the color and 該Ka in error inserting a concrete pipe, concrete pipe for joining the spigot of concrete pipes In the provided anti-detachment joint structure,
A cylindrical steel plate that is fixed to one concrete pipe of two concrete pipes facing each other on one side, and a spigot of the other concrete pipe is movably inserted on the other side, and has a predetermined length and exit length portion, and hear error before and a collar distal section having a receiving portion for protruding in the direction of the propulsion on the inner surface side,
A water stop formed on the front side of the propulsion, which is fixed to the outer peripheral surface of the tip of the spigot, and a rubber ring integrally formed from a protrusion provided on the rear side of the propulsion. Consists of
In the position where the previously ineffective error spigot is inserted, the water stopping shape forms the exit length portion and the waterproof folds and protrusions and said waterproofing fold and ridges are compressed when you are presenting, the receiving portion of the collar tip is spaced from the protrusions when in the position in which the spigot is relatively moved in the opposite direction to before hear color, the color tip receiving portion of the parts are housing the ridge, concrete pipe movement of said receiving portion is present a locked form, characterized in that the departure from the previous hear error of the spigot is prevented with A detachment preventing joint structure is provided.

The present invention also Oite the restraint joint structure provided concrete pipe as described above, the rubber wheels, concrete, characterized in that it is bonded to the recess formed on the tip outer peripheral surface of the spigot - Doo tube Provided is a separation preventing joint structure provided.

The present invention also features Oite the restraint joint structure provided concrete pipe as described above, before compression, and this outer diameter of the protrusions is larger than the outer diameter of the water stop folds A detachment preventing joint structure provided on a concrete pipe is provided.

The present invention also provides a detachment prevention provided on a concrete pipe that joins a concrete pipe spigot attached to the above-described concrete pipe and extending in the longitudinal direction of the concrete pipe and inserted into the collar for joining. In the method of manufacturing the joint for preventing separation of the joint structure,
The collar is a cylindrical steel plate-like collar that is fixed to one concrete pipe of two concrete pipes facing each other on one side and a spigot of the other concrete pipe is movably inserted on the other side, The collar is a steel plate-like collar with a predetermined length into which the spigot is movably inserted, and a collar provided with a receiving portion that protrudes toward the inner surface and faces toward the propulsion direction. With a tip,
A rubber ring integrally formed from a water stop fold formed on the propulsion front side and a protrusion provided on the propulsion rear side is fixed to the outer peripheral surface of the tip of the spigot,
Bending Fold before Symbol collar tip inwardly to form a receiving space portion for accommodating the protruding portion,
The spigot is in a position where the spigot is inserted into the collar, and the extended length portion and the water stop ridge and the ridge portion have a water stop shape in which the water stop ridge and the ridge portion are compressed. The collar tip receiving portion is separated from the protrusion, and when the spigot is in a position moved relative to the collar in the opposite direction, the collar tip receiving portion is Detachment prevention provided in a concrete pipe characterized in that the protrusion is housed and the movement of the receiving part is locked to prevent the spigot from being detached from the collar. Provided is a method for manufacturing a joint for preventing separation of a joint structure.

The present invention is also the restraint joint manufacturing method of the restraint joint structure described above, withdrawal of the restraint joint structure characterized in that a diameter larger than the inner diameter of the housing space inside diameter of the exit length of the A method for manufacturing a prevention joint is provided.

The present invention also separation preventing joint and forming Oite the restraint joint manufacturing method of the restraint joint structure described above, the ridges, the fold body or a plurality of pleats piece over the entire circumference Provided is a method of manufacturing a structure for preventing separation of a structure.

The present invention also provides a concrete pipe characterized by having a detachment prevention pipe joint structure provided on any of the concrete pipes described above.

  In the present invention, as described above, a rubber ring is bonded to the outer peripheral surface of the spigot, and the concrete pipe collar is formed into a protruding long portion having a predetermined length. The tip of the concrete pipe collar allows the collar to move a sufficient distance that the collar allows when the water folds and the ridges abut against each other in a compressed state and both concrete pipes move relatively in the direction of disengagement. Since the movement of the ridges can be locked by the receiving part provided in the part, the construction is simplified, it is arranged inside the concrete pipe collar, and it is easy for curved laying and fixed scale ground displacement It is possible to provide a detachment preventing joint structure provided on a concrete pipe that can follow.

The figure which shows the whole Example of this invention including a cross section. The side view of a rubber ring. The figure which shows the partial detailed structure of a rubber ring. The figure explaining the function of the Example of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows concrete pipes connected by a detachment preventing joint structure provided on a concrete pipe according to an embodiment of the present invention.

  In FIG. 1, a concrete pipe 100 is composed of left and right concrete pipes 100A and 100B. The abutting end portions of both concrete pipes 100A and 100B are in a state of abutting via a buffer member. In the case of this example, a cylindrical steel plate-like concrete tube collar 1 formed with a protruding long portion 20 is fixed to the outer peripheral surface of the end portion 90 of the left concrete tube 100A. The length of the extended portion 20 is set to a predetermined length according to official standards in order to follow curve laying, earthquake, or ground displacement. In the present invention, the term “concrete pipe collar” refers to a steel concrete pipe collar. The spigot 91 of the other right concrete pipe 100B is provided with a rubber ring 2 in which a water stop and a protrusion are integrally formed. Therefore, the water stop fold and the protruding portion operate integrally. The rubber ring 2 is inserted and adhered so as to be in contact with the shallow concave portion 31 provided in the spigot 91. The above-described concrete pipe collar 1 and the rubber ring 2 provided on the spigot 91 form a separation preventing joint 101 that is a pipe joint capable of stopping water. Thus, there is one feature in that a joint is formed by the concrete pipe collar 1 and the rubber ring 2 provided with the withdrawal long part 20. The disengagement prevention joint 101 disperses the displacement of the front and rear pipe joints, and the disengagement prevention joint 101 is prevented from being broken by not being disengaged beyond the allowable range.

  A concrete pipe collar 1 is provided at the right end of the right concrete pipe 100B in the same manner as the left concrete pipe. Therefore, the rubber ring 2 is provided on the spigot 91 of the concrete pipe on the right side in the same manner as described above.

  The rubber ring 2 is covered with the concrete pipe collar 1 and cannot be seen from the outside.

  FIG. 2 shows a side view of the rubber ring, and FIG. 3 shows a part of the cross section of the rubber ring in detail. The rubber ring 2 has an annular shape as shown in FIG.

  2 and 3, the rubber ring 2 includes a base portion 10, two-stage water stop folds 11 and 12, and a ridge portion 13 provided in the third step. As shown in the figure, the water stop folds 11 and 12 increase in thickness in the tube axis direction toward the base 10, and the tips are formed as pointed ends. The water stop effect is increased by using a pointed tip. Each of the water stop folds 11 and 12 has an annular shape extending over the entire circumference, and in this example, it is formed as two water stop folds having exactly the same shape. Although a book may be sufficient, it is preferable that it is two on arrangement | positioning and water stop. The two still water folds 11 and 12 and the ridge 13 are inclined to the right as a whole. In this example, it is inclined rightward, but it can be used even if it is formed in the vertical direction. However, it is desirable to incline to the right as a whole.

  The protruding portion 13 is formed to have substantially the same width in the vertical direction, and a roundness 14 is formed at the tip. In the case of this example, the outer diameter of the protrusion 13 is formed larger than the outer diameter of the water stop folds 11 and 12. The ridge 13 is formed from a pleat body or a plurality of crease pieces over the entire circumference. Although it is not necessary to make it annular, it is good to make it annular.

The hardness of the water stop folds 11 and 12 and the protrusion 13 of the rubber ring 2 can be changed. For example, the durometer hardness of the water stop folds 11 and 12 is H _A 50 ± 5, the durometer hardness of the ridge 13 is _HA 70 ± 5, and the hardness of the ridge 13 is the water folds 11 and 12. It should be harder than the hardness.

  FIG. 4 shows a diagram in which a spigot 91 is inserted into the concrete pipe collar 1 for joining, and a detachment prevention pipe joint is constituted by the rubber ring 2.

  FIG. 4 shows a state in which the spigot 91 of the right concrete pipe 100B is inserted into the concrete pipe collar fixed to the left concrete pipe 100A. In this example, the propulsion direction indicates the direction from the right side to the left side, and the direction toward the propulsion indicates the direction from the left side to the right side. Reference numeral 26 denotes a buffer member.

  The construction procedure is performed by 1) inserting a pair of anti-separation fittings for joining, and then 2) applying a propulsive force for “propulsion” of the entire tube row. The propulsion work is a repetitive operation of 1) and 2) described above. The joined state is that the first pair of anti-separation fittings are joined in the propulsion, and the last anti-separation fitting is joined, and then the propulsion is completed. After completion, the joined state is continued.

  The concrete pipe collar 1 is formed with several convex parts inward of the pipe and three concave parts (three in this example) outward from the pipe for fixing to the concrete pipe 100A. At the right end). That is, the collar tip portion is formed as a barb receiving portion 21 that protrudes toward the outer surface side and then toward the inner surface side and is provided with a receiving portion 22 in the forward direction (left direction in the drawing) with respect to the propulsion direction. In the case of this example, the receiving portion 22 is formed by being bent until the tip end portion of the concrete pipe collar is directed in the propulsion direction and the forward direction. The angle of the receiving portion 22 is 30 ° in the reverse direction as shown in the figure. This angle may be a receiving angle and may be within 30 °. The barb 21 having the receiving part 22 can be formed by other means, but it is cheaper and simpler to form the concrete pipe collar by bending the tip part. In this way, by bending the tip end portion of the concrete collar, the insertion portion 23 is formed facing the receiving portion 22, and the inside is the storage space portion 24. The receiving part 22 plays a role of a function in which the protruding part 13 passes over this and moves further to the left. In this manner, the extended length portion 25 is formed so as to continue to the tip portion of the concrete pipe collar. The withdrawal length of the withdrawal length portion 25 is not less than a predetermined length defined by official standards, and there are, for example, three types of 67 mm, 77 mm, and 97 mm.

  As shown in FIG. 4, the inner surface of the extended length portion 25 is flat, and no dents or ridges are formed.

  The inner diameter of the storage space portion 24 is larger than the inner diameter of the extended portion 25, and the outer diameter of the receiving portion 22 is larger than the inner diameter of the inner surface of the tip portion of the concrete pipe collar. The outer diameter is larger than the outer diameter of the extended portion, and the storage space 24 is made larger so that the larger protrusion 13 can be stored. The structure of the catch 21 is not limited to the structure shown in FIG. 3, as long as it has a hooking function with respect to the ridge 13 as described later and the ridge 13 does not get over this. . Accordingly, the protruding portion 13 has an outer diameter smaller than the outer diameter of the water stop folds 11 and 12 and is not compressed by the extended portion 25 but is compressed by the receiving portion 22 so that the spigot 91 is in the reverse direction of propulsion. It is preferable to adopt a structure that can be received by the receiving portion 22 when it is moved, that is, moved in the withdrawal direction. Therefore, the shape of the ridge 13 is preferably matched to the shape of the storage space 24. When the spigot 91 is about to be detached from the concrete pipe collar 1 due to curved laying, earthquake or a certain scale of ground displacement, the shape of the storage space 24 and the ridge 13 is “ It is desirable that there is no “play”.

  A cylindrical, circular, smooth out-going length 25 is provided at the concrete pipe collar tip. The withdrawal length of the withdrawal length portion 25 is a length that allows the protruding portion 13 to move in the pipe axis direction, and in this example, is about 60 mm when the concrete pipe is 700 mm.

  The rubber ring 2 is fixed to a recess 31 formed at the tip of the spigot 91. Although it is possible to adhere to the flat portion, it is preferable to form a concave portion and fix the concave portion 31 as in this example.

  As can be seen, the water stop folds 11, 12 and the protrusion 13 of the rubber ring 2 protrude outward and are inclined with respect to the propulsion direction, and the water stop folds 11, 12 are the tips of the spigot 91. The outer peripheral surface is provided on the propulsion front side over the entire circumference, and the protrusion 13 is provided on the propulsion rear side, that is, on the side close to the reverse receiving member 21. As described above, in this embodiment, the water stop folds 11, 12 and the protrusion 13 integrated rubber ring 2 are fixed to the concave portion 31 of the spigot 91 and disposed opposite to the concrete pipe collar 1 to prevent water stop and detachment. A detachment prevention joint is formed.

  In FIG. 4, the waterproof folds 11 and 12 and the protrusion 13 are depicted as projecting outward from the concrete pipe collar 1, but this is depicted as projecting only for explanation. Therefore, the water stop folds 11 and 12 and the protruding portion 13 are compressed, and the tip portion comes into contact with the inner surface of the concrete pipe collar 1 and stops. As described above, the outer diameters of the water stop folds 11 and 12 and the protrusion 13 are larger than the inner diameter of the inner surface of the concrete pipe collar. By making the large diameter, the water stop folds 11 and 12 are compressed and the tip part comes into contact with the inner surface of the concrete pipe collar to perform the water stop function. Before the spigot 91 is inserted for joining, the rubber ring 2 is positioned on the right side of the concrete pipe collar 1 and is not compressed at all in the form shown in FIG.

  When the spigot 91 is inserted or moved to the left, the water stop fold 11 first comes into contact with the receiving portion 22 of the barbed 21. The still water fold 11 is compressed here, and smoothly passes over this point by an angle of 30 ° in the reverse direction provided in the receiving portion 22, and the compressed shape formed by the extended length portion 25 is maintained as it is.

  Similarly, the water stop fold 12 and the ridge portion 13 are compressed and contracted by the receiving portion 22 of the return receiving portion 21, and are compressed by the withdrawal long portion 25. The rubber ring 2 is moved in the propulsion direction in a state where the rubber ring 2 is in contact with the pull-out long portion 25 and is stopped at the position shown in FIG. The water stop folds 11 and 12 prevent water from leaking out or entering water. That is, it has “watertightness”.

  The left concrete pipe 100 </ b> A and the right concrete pipe 100 </ b> B can move in a direction away from each other. Now, for ease of explanation, it is assumed that the spigot 91 has moved in the right direction, that is, in the exit direction.

  When the spigot 91 moves out of the right direction and reaches the end of the extended length portion 25, the movement of the ridge portion 13 is locked by the receiving portion 22. In this state, the ridge 13 is released from compression and is stored in the storage space 24 from the insertion portion 23. In this case, it is not necessary to release all of the compressed amount, but in the state where the compression is released by keeping the shape of the storage space portion 24 and the protrusion portion 13 the same, the protrusions The portion 13 is stored in the storage space portion 24 and effectively acts to prevent detachment. In the case of this example, in order to form the storage space portion 24 in this manner, the concrete pipe collar tip is bent to the outer surface side before being bent to the inner surface side. The storage space 24 can be formed without being bent to the outer surface side. Further, the receiving portion 22 may be formed without forming the storage space portion 24.

  In this way, when both concrete pipes move in the detaching direction, a relative distance of a sufficient distance allowed by the concrete pipe collar 1 is allowed. The protruding portion 13 can be reliably locked.

  According to the present embodiment, as described above, the rubber ring 2 is fixed to the outer peripheral surface of the spigot, and the withdrawal length portion 25 having a predetermined length is formed on the concrete pipe collar 1 so that the withdrawal length portion is formed. When the water stop folds 11 and 12 and the ridge 13 are compressed and abutted on the inner surface and both the concrete pipes 100A and 100B move relatively in the disengagement direction, the receiving part 22 provided in the concrete pipe collar 1 The protrusion 13 can be moved and locked. By this, construction is simplified, and a disconnection preventing joint structure provided on the concrete pipe that is arranged inside the concrete pipe collar 1 and can easily follow curve laying, earthquake or ground displacement is provided. Can do.

  In addition, it is possible to provide a concrete pipe connected by the separation preventing joint structure.

  DESCRIPTION OF SYMBOLS 1 ... Concrete pipe collar, 2 ... Rubber ring, 10 ... Base part, 11, 12 ... Water stop, 13 ... Projection part, 14 ... Roundness, 21 ... Receiving receptacle, 22 ... Receiving part, 23 ... Insertion part, 24 ... Storage space, 25 ... Outgoing long part, 91 ... Spigot, 100A, 100B ... Left and right concrete pipes, 100 ... Concrete pipe, 101 ... Detachment prevention joint.

Claims (7)

Attached to concrete pipes, and extend into the concrete pipe longitudinally inserted for bonding the color and 該Ka in error inserting a concrete pipe, separation preventing provided in the concrete pipe for joining the spigot of concrete pipes In the joint structure,
A cylindrical steel plate that is fixed to one concrete pipe of two concrete pipes facing each other on one side, and a spigot of the other concrete pipe is movably inserted on the other side, and has a predetermined length and exit length portion, and hear error before and a collar distal section having a receiving portion for protruding in the direction of the propulsion on the inner surface side,
A water stop formed on the front side of the propulsion, which is fixed to the outer peripheral surface of the tip of the spigot, and a rubber ring integrally formed from a protrusion provided on the rear side of the propulsion. Consists of
In the position where the previously ineffective error spigot is inserted, the water stopping shape forms the exit length portion and the waterproof folds and protrusions and said waterproofing fold and ridges are compressed when you are presenting, the receiving portion of the collar tip is spaced from the protrusions when in the position in which the spigot is relatively moved in the opposite direction to before hear color, the color tip receiving portion of the parts are housing the ridge, concrete pipe movement of said receiving portion is present a locked form, characterized in that the departure from the previous hear error of the spigot is prevented with Detachment prevention joint structure provided in Provided bets tube - Oite the restraint joint structure provided concrete pipe according to claim 1, wherein the rubber ring is, concrete, characterized in that it is bonded to the recess formed on the tip outer peripheral surface of the spigot Detachment prevention joint structure. Oite the restraint joint structure provided concrete pipe according to claim 1, in uncompressed condition, and wherein the this outer diameter of the protrusions is larger than the outer diameter of the water stop folds Detachment prevention joint structure provided on the concrete pipe. A method of manufacturing a detachment prevention joint structure of a detachment prevention joint structure provided on a concrete pipe for joining a collar attached to the concrete pipe and extending in the longitudinal direction of the concrete pipe and a spigot of the concrete pipe inserted into the collar for joining. In
The collar is a cylindrical steel plate-like collar that is fixed to one concrete pipe of two concrete pipes facing each other on one side and a spigot of the other concrete pipe is movably inserted on the other side, The collar is a steel plate-like collar with a predetermined length into which the spigot is movably inserted, and a collar provided with a receiving portion that protrudes toward the inner surface and faces toward the propulsion direction. With a tip,
A rubber ring integrally formed from a water stop fold formed on the propulsion front side and a protrusion provided on the propulsion rear side is fixed to the outer peripheral surface of the tip of the spigot,
Bending Fold before Symbol collar tip inwardly to form a receiving space portion for accommodating the protruding portion,
The spigot is in a position where the spigot is inserted into the collar, and the extended length portion and the water stop ridge and the ridge portion have a water stop shape in which the water stop ridge and the ridge portion are compressed. The collar tip receiving portion is separated from the protrusion, and when the spigot is in a position moved relative to the collar in the opposite direction, the collar tip receiving portion is Detachment prevention provided in a concrete pipe characterized in that the protrusion is housed and the movement of the receiving part is locked to prevent the spigot from being detached from the collar. How to make joints for preventing detachment of joint structures. In restraint joint manufacturing method of the restraint joint structure of claim 4, separation preventing the separation preventing joint structure, characterized in that a diameter larger than the inner diameter of the housing space inside diameter of the exit length of the Joint manufacturing method . Oite to have been restraint joint manufacturing method of the restraint joint structure according to claim 4, restraint joint structure and forming the ridge portion, the fold body or a plurality of pleats piece over the entire circumference Of making anti-separation joints . Concrete pipe, characterized in that it comprises a separation preventive fitting structure provided concrete pipe as claimed in any one of claims 1 to 3.

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