JP4180499B2 - Attachment device for attachment body to tubular body, and attachment structure for tubular body - Google Patents

Description

The present invention bellmouth the tube parallel or spiral (line such guiding member of the drawer-retraction), closed cap, mosquitoes Ppuringu without "play" occurs various attachment member, such as, yet rapidly The present invention relates to an attachment device for attaching an attachment body to a tube body, and an attachment structure for a tube body.

  Conventionally, when an attachment body such as a bell mouth or a closure cap is attached to an end portion of a tubular body having an inner surface provided with spiral irregularities, a male screw portion provided on an outer peripheral surface of the attachment body is attached to the tube. It was screwed into the irregularities on the inner peripheral surface of the body. Further, when connecting the tube body to a connected body (connected wall) such as a wiring box, underground box, etc., from the inside of the connected body, a male screw portion formed on the outer peripheral surface of the tightening body, The pipe body was screwed into and connected to the irregularities on the inner peripheral surface (for example, Patent Document 1). However, the operation of attaching the attachment body and the fastening body by sequentially screwing them in from the end of the tube body is very troublesome and requires time.

  In addition, when the attachment body is attached to the end portion of the tubular body in which the parallel unevenness is continuously provided on the inner surface, the attachment body is forcibly pushed into the end portion of the tubular body to The engagement protrusions provided on the outer peripheral surface of the attached body are engaged with the recesses on the inner peripheral surface of the tubular body. Also, when connecting a tubular body to the body to be connected, the fastening body is pushed into the tubular body from the inside of the body to be connected, and the engaging protrusions of the fastening body are formed on the uneven portions on the inside of the tubular body. Engaged and connected.

  In the above case, the attachment can be done simply by pushing in the tube without screwing the attachment or tightening body into the tube. Since the attachment structure of the attachment body is a stepwise engagement structure corresponding to the pitch of the irregularities inside the tube body, the attachment state of the attachment body to the tube body or the connection state of the tube body to the connected body However, there is a problem of lack of certainty of attachment or connection due to the occurrence of “backlash” or a gap. Moreover, since the above-mentioned engagement structure is merely pushing the attachment body or the tightening body into engagement with the concavo-convex portion on the inner side of the tube body, there is a possibility that it will come off.

In the above example, the mounting body or the fastening body is attached to the inner side of the pipe body in which the parallel or spiral irregularities are formed on the inner surface, but the parallel or spiral irregularities are formed on the outer surface. Even when the ends of the tubular body are inserted into the inside of the coupling and the tubular bodies are connected via the coupling by the above-described screw-in structure or engaging structure, the same problem as described above has occurred. .
Japanese Utility Model Publication No. 60-36998

  An object of the present invention is to enable various attachments such as a bell mouth, a closure cap, a connector, and a coupling to be attached to a parallel or spiral tube body without causing "backlash" and quickly. .

The invention of claim 1 for solving this problem is an attachment device for an attachment body attached to a tubular body in which parallel or spiral irregularities are continuously formed in the longitudinal direction on the inner periphery, An attachment body provided with a threaded protrusion on the outer periphery and having an insertion portion to be inserted into the tubular body, and a ring shape in which a part of the circumferential direction is omitted , the screw of the attachment body In a state in which a threaded projecting portion that is threadedly engaged with the mating projecting portion is provided on the inner periphery and is disposed in the concave portion on the inner side of the tubular body, at least the side surface on the insertion side of the attachment body on both side surfaces. The anti-slip member for increasing the sliding resistance in the rotational direction with respect to the opposed inner wall surface constituting the concave portion in the tubular body is integrally attached and disposed in the concave portion inside the tubular body. An attachment member that can be expanded and deformed to be restored to its original shape by elastic deformation. With the attachment member disposed in the concave portion on the side, the insertion portion of the attachment body is pushed into the tubular body and inserted, thereby expanding the diameter of the attachment member in the concave portion and inserting the insertion member. The insertion portion is allowed to be inserted, and after the insertion portion is inserted, at least one of the attachment body or the attachment member is rotated so that the screwing protrusion of the attachment body and the screwed portion of the attachment member are rotated. It is characterized in that the attachment body can be attached to the tube body by screwing the mating protrusion and fastening the tube body and the attachment body to each other.

  According to the first aspect of the present invention, in the state where the attachment member is disposed in the concave portion on the inner side of the tube body, the threaded protrusion on the inner periphery of the attachment member is Since it protrudes inward, when the insertion portion of the attachment body is pushed into the tube body and inserted, the attachment member disposed in the recess portion inside the tube body by the threaded protrusion on the outer periphery of the insertion portion. The member is expanded and deformed, and the insertion portion of the attachment body is inserted into the tubular body. After the insertion portion of the attachment body is inserted into the tube body, at least one of the attachment body or the attachment member is rotated, and the screwing protrusion of the attachment body and the screwed portion of the attachment member are rotated. When the mating protrusion is screwed together, the tube body and the attachment body are fastened to each other via the attachment member. Thereby, the insertion length of the insertion part of the attachment body with respect to the tubular body is maximized, and the attachment body is attached to the tubular body. For this reason, the attachment body is securely attached to the tube without any backlash or gaps, and the attachment body is rotated only during the final tightening. In most of the remaining states, the attachment body only needs to be pushed into the tube body, so that the attachment time of the attachment body to the tube body is also greatly reduced. Here, as a form in which the attachment body is attached to the tube body, the attachment body is attached to the tube body in a state where the rods formed on the attachment body are in direct contact with the end surface of the tube body. A first attachment form, an end face of a tubular body that is inserted and fixed in an insertion hole of a connected body to which the tubular body is connected, and a surface on the side of inserting the attached body in the connected body In a state where a predetermined gap is formed between them, after the attachment body is pushed into the end of the tube body, at least one of the attachment body or the connection body is rotated to connect the attachment body There is a second attachment configuration in which the attachment body is attached to the connected body while being brought into contact with the surface of the body. In particular, in the second embodiment, there is a predetermined gap between the end surface of the tubular body that is inserted and fixed in the insertion hole of the connected body to which the tubular body is connected, and the surface of the connected body on the side where the attachment body is inserted. The structure is characterized in that the attachment body is attached to the end portion of the tubular body in a state where the gap is formed.

Here, in the state in which the attachment member is disposed in the recess inside the tube body, the recess in the tube body is formed on at least the side surface on the insertion side of the attachment body on both side surfaces of the attachment member. Since the anti-slip member that increases the sliding resistance in the rotational direction with respect to the opposing inner wall surface that constitutes the body is integrally attached, the tube body and the attachment member do not rotate together, and the attachment body with respect to the tube body Can be installed quickly and reliably.

  On the other hand, in order to remove the attachment body attached to the pipe body, at least one of the attachment body or the attachment member is rotated in the opposite direction to the above, and the threaded protrusion of the attachment body When the pulling force is applied to the attachment body inserted into the tubular body in a state where the screwed projection of the attachment member is loosened, the attachment member is expanded in diameter, The attachment body is pulled out as it is from the tube without rotating the attachment body. In addition, when the said extraction is difficult by the shape of the thread of the screwing protrusion of the attachment body and the screwing protrusion of the attachment member, the attachment body is rotated and removed from the tube body.

According to a second aspect of the present invention, in the first aspect of the present invention, at least one of the threaded projection and the threaded projection is inserted to facilitate insertion of the insertion portion of the attachment body. It is characterized in that sometimes the opposing surfaces are inclined.

According to the second aspect of the present invention, since the pushing force of the attachment body when the insertion portion of the attachment body is pushed into the tube body to be inserted can be reduced, the attachment body can be easily inserted into the tube body. .

According to a third aspect of the present invention, in the second aspect of the present invention, at least one of the threaded projection and the threaded projection is formed in a sawtooth shape in cross section.

According to the invention of claim 3 , it is easy to insert the insertion portion of the attachment body into the tubular body, and the attachment body once attached to the tubular body has a structure that is difficult to remove from the tubular body.

According to a fourth aspect of the present invention, in the second or third aspect of the present invention, the threaded protrusion formed on the outer periphery of the insertion portion of the attachment body is formed in an inclined or cross-sectional saw blade shape. It is a feature.

According to the invention of claim 4 , the threaded protrusion formed on the outer periphery of the insertion portion of the attachment body is formed in a cross-sectionally inclined surface shape or a cross-sectional saw blade shape, so that it is in the concave portion inside the tube body. Since the cross-sectional shape of the threaded projection formed on the inner peripheral side of the mounting member to be disposed can be made into a non-inclined surface shape and contacts a large number of threaded projections during insertion, the above-mentioned many contact opportunities The strength of the threaded projection is increased.

The invention according to claim 5 is the invention according to any one of claims 1 to 4 , wherein the attachment body is attached to an end portion of a tubular body such as a bell mouth or a closure cap. It is characterized by.

According to the invention of claim 5, the bell mouth, the closing cap, etc., which are attached to the end of the tubular body as a single unit, can be firmly and quickly attached without causing a gap at the end of the tubular body. Become.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the attachment body is a coupling for connecting pipe bodies to each other , and a pipe is connected to a receiving port of the attachment body. It is characterized in that the body is connected.

According to the sixth aspect of the present invention , the pipe body can be reliably and quickly connected to the coupling receiving port for connecting the pipe bodies without generating a gap.

Further, the invention of claim 7 is a structure in which a tubular body in which parallel or spiral irregularities are continuously formed in the longitudinal direction on the inner periphery is attached to a connected wall such as a box or underground box. an insertion portion to the outer periphery is screwed protrusion is inserted into the tube body provided, the attachment body having a flange portion formed integrally on one longitudinal end of the insertion portion, the circumferential direction of the A part of the ring-shaped part is missing, and a threaded projection to be threadedly engaged with the threaded projection of the attachment body is provided on the inner periphery, and is disposed in a recess inside the tube. In this state, an anti-slip member for increasing the sliding resistance in the rotational direction with respect to the opposing inner wall surface constituting the concave portion in the tubular body is integrally attached to at least the side surface on the insertion side of the attachment body on both side surfaces. The original shape due to its own elastic deformation in a state of being disposed in the recess inside the tube body An attachment member that can be expanded and deformed to be restored, and the wall to be connected is disposed between an end surface of the tube body and a flange portion of the attachment body, and the inside of the recess inside the tube body In the state where the attachment member is disposed, the insertion portion of the attachment body is pushed into the tubular body and inserted, thereby expanding the diameter of the attachment member within the recess and inserting the insertion portion. And allowing at least one of the attachment body or the attachment member to rotate after insertion of the insertion portion, and a screwing protrusion of the attachment body and a screwing protrusion of the attachment member. The connected wall is sandwiched between the end portion of the tubular body and the flange portion of the attachment body by screwing together.

According to the seventh aspect of the present invention, by pulling the tubular body toward the attachment body by the rotation of the attachment body, the tubular body is located between the end portion of the tubular body and the flange portion of the attachment body. With the structure in which the wall to be connected such as a box or a buried box is sandwiched, the pipe is connected to the wall to be connected reliably and quickly.

Further, the invention of claim 8 is an attachment device for an attachment body to be attached to a pipe body in which parallel or spiral irregularities are continuously formed in the longitudinal direction on the outer periphery, and screwed into the inner periphery. An attachment body provided with a portion to be inserted into which an end of the tube body is inserted, and a ring shape in which a part of the circumferential direction is omitted. In a state where a threaded projecting portion that is screwed with the mating projecting portion is provided on the outer periphery, and is disposed in the concave portion outside the tube body, at least the side surface on the insertion side of the attachment body on both side surfaces An anti-slip member for increasing the sliding resistance in the rotational direction against the opposing inner wall surface constituting the concave portion on the outer side of the tubular body is integrally attached and disposed in the concave portion on the outer side of the tubular body. An attachment member that can be reduced in diameter so as to be restored to its original shape by elastic deformation of the outer surface of the tube With the attachment member disposed in the recess, the diameter of the attachment member is reduced in the recess by pushing and inserting the end of the tube into the insertion portion of the attachment. The insertion of the end of the tubular body is allowed, and after the end of the tubular body is inserted into the insertion portion, at least one of the attachment body or the attachment member is rotated to By screwing the threaded protrusion and the threaded protrusion of the attachment member, the tube body and the attachment body are fastened together, thereby making it possible to attach the attachment body to the tube body. It is characterized by that.

According to the eighth aspect of the present invention, the back end of the tubular body is simply pushed into the inserted portion of the mounting body and inserted, and the mounting body is free of “gap” with no gap in the tubular body. It can be installed quickly without any problems.

The invention of claim 9 is characterized in that, in the invention of claim 8 , the attachment body is a coupling for connecting pipes to each other.

According to the ninth aspect of the present invention, the coupling for connecting the pipes can be firmly and quickly attached without generating a gap between the ends of the pipes.

  The present invention inserts the insertion portion of the attachment body into the tubular body while the attachment member is disposed in the concave portion inside the tubular body having parallel or spiral irregularities formed on the inner periphery. By allowing the attachment member to expand in diameter in the recess to allow the insertion of the insertion portion, after insertion of the insertion portion, rotate at least one of the attachment body or the attachment member, By screwing the threaded protrusion of the attachment body and the threaded protrusion of the attachment member, the tube body and the attachment body are fastened to each other, thereby attaching the attachment body to the tube body. Since the structure is made attachable, the attachment body can be reliably and quickly attached to the pipe body without causing "play". Further, even in a tubular body having parallel or spiral irregularities formed on the outer periphery, an attachment body having an insertion portion for inserting an end portion of the tubular body into the inside is attached to the tubular body via an attachment member. Therefore, it can be attached reliably and promptly without causing any play.

  Hereinafter, the present invention will be described in more detail with reference to the best mode of the present invention.

FIG. 1 is a longitudinal sectional view of a manhole M in which a conduit P having a bell mouth B or the like attached to the end of the conduit P is connected to the end of the conduit P by the attachment device according to the present invention. FIG. 3 is a perspective view of a mounting ring R ₁ disposed in a recess 11 on the inner side and a bell mouth B attached to the end of the conduit P through the mounting ring R ₁ . FIG. 4 is a perspective view of the attachment ring R ₁ , FIG. 5 is a front view of the same, and FIG. 6 is a sectional view taken along line XX of FIG. FIGS. 7A, 7B and 7C are enlarged sectional views taken along lines Y ₁ -Y ₁ , Y ₂ -Y ₂ and Y ₃ -Y _{3 in} FIG. 5, respectively. The conduit P is molded from a synthetic resin, and as shown in FIG. 2, the concave portions 11 and the convex portions 12 are alternately provided in parallel along the longitudinal direction and have flexibility. Is. In addition, since the thickness of the conduit P is constant, an uneven portion having a reverse relation to the concave portion 11 and the convex portion 12 inside is formed on the outer side of the conduit P.

A bell mouth (guide for drawing / drawing wires) B is attached to the end to prevent the end of the conduit P from being caught, so that the wire can be drawn / drawn smoothly from / to the conduit P. 2 and 3, the whole is molded of a synthetic resin, and as shown in FIGS. 2 and 3, the collar portion 14 is integrally formed at one end of the cylindrical body portion 13. The portion of the inner peripheral surface from the main body portion 13 to the flange portion 14 is formed in an arc shape so as to eliminate the pulling of the electric wire to the conduit P and the hooking at the time of pulling in, and the outer peripheral surface of the main body portion 13 is formed on the outer peripheral surface. A male screw portion 15 having a predetermined pitch S ₁ is formed. The portion of the main body portion 13 opposite to the flange portion 14 is not formed with the male screw portion 15 by a predetermined length from the end surface, and the portion of the main body portion 13 where the male screw portion 15 is not formed is When the bellows B main body 13 is inserted and attached to the end of the conduit P, it is easily inserted into the attachment ring R ₁ disposed in the recess 11 inside the conduit P. It functions as the insertion guide part 16. As shown in the enlarged view of FIG. 3, the shape of the thread 15 a of the male screw portion 15 is such that the surface facing the attachment ring R ₁ disposed in the concave portion 11 inside the conduit P is an inclined surface. It is formed in a saw blade shape to be 15b. The reason why the shape of the thread 15a of the male screw portion 15 is as described above is as follows. When the body portion 13 of the bell mouth B is pushed in and inserted into the end portion of the conduit tube P, the male screw portion 15 formed on the outer peripheral surface of the body portion 13 of the bell mouth B is placed inside the conduit tube P. abuts against the inner peripheral surface of the female screw portion 24 of the attachment ring R ₁ which is disposed in the recess 11 (see FIGS. 2 and 8), the attachment ring by the contact force (pushing force of the bellmouth B) The diameter of R ₁ is expanded by elastic deformation to allow passage of the main body 13 of the bell mouth B (the male screw portion 15 on the outer periphery thereof), but the diameter of the attachment ring R ₁ can be easily expanded by elastic deformation. It is to do. That is, as the inclination angle (θ) of the inclined surface 15b of the thread 15a of the male thread portion 15 is reduced, the force (indentation force) required to push the bell mouth B into the conduit P becomes smaller, and the attachment ring Since the diameter expansion amount of R ₁ is reduced, the inclination angle (θ) of the inclined surface 15b of the screw thread 15a is compared with the pushing force of the bell mouth B and the diameter expansion amount of the attachment ring R _1. Determined.

Further, the inner side surface 14a of the collar portion 14 of the bell mouth B is perpendicular to the axial center 26 of the cylindrical main body portion 13, and the bell mouth B is inserted into one end of the conduit P and attached. When doing so, it is easy to adhere to the inner wall surface 2 of the side wall 1 of the manhole M. In FIG. 2 and FIG. 3, 17 is a tool engaging recess for engaging a tool for tightening the external thread portion 15 of the bellmouth B with respect to the female screw portion 24 of the attachment ring R ₁ A plurality of outer peripheral surfaces of the flange 14 are formed on the peripheral edge.

Next, the attachment ring R ₁ will be described with reference to FIGS. 2 and 4 to 7. The attachment ring R ₁ is molded of a synthetic resin, and a part of the ring is missing (in the embodiment, it is missing by about 50 ° at the central angle) and is directed radially outward on the inner peripheral surface. The ring main body 21 can be expanded by elastic deformation by receiving a force, and the pair of anti-slip members 23 are fitted in arc-shaped fitting grooves 22 on both side surfaces of the ring main body 21. The ring main body 21 is a shape in which a part of the ring is omitted as a whole shape, and the cross-sectional shape thereof is a substantially trapezoidal shape whose inner side is slightly wider than the outer side, and on the inner peripheral surface. Is formed with a female screw portion 24 having a square screw thread over the entire circumference. The female screw portion 24 is a “square screw” having a square cross section of the screw thread 24 a, and the pitch thereof is equal to the pitch S ₁ of the male screw portion 15 on the outer periphery of the bell mouth B. In the non-deformed state of the attachment ring R ₁ , the inner diameter (d ₁ ) [see FIG. 6] of the female screw portion 24 is the outer diameter (D ₁ ) of the male screw portion 15 formed in the body portion 13 of the bell mouth B. ) Slightly smaller than [see FIG. 3], with the attachment ring R ₁ disposed in the recess 11 near the inner end of the conduit P, from the end opening of the conduit P Upon insertion of the bellmouth B, threads 15a of the external thread portion 15 of the bellmouth B is on the side surface 24b of the threads 24a of the female screw portion 24 of the attachment ring R ₁ (precisely, the side surface 24b and the inner peripheral surface 24c The dimensions are designed to contact the crossing edge portion). Further, in order to facilitate elastic deformation of the ring main body 21, a missing portion 24 d is provided in the central portion along the circumferential direction of the female screw portion 24.

Further, the fitting grooves 22 provided on both side surfaces of the ring body 21 are continuously provided in all parts except for both ends of the ring body 21. With regard to the depth of the fitting groove 22, FIG. As shown in FIG. 5 and FIG. 7, the central angle (α) portion is deeper than the remaining portion from the both ends of the fitting groove 22. Further, on the outer peripheral inner wall surface of the fitting groove 22, there are provided retaining projections 25 for preventing the slip prevention member 23 made of rubber fitted in the fitting groove 22 along the circumferential direction. And projecting into the groove. For this reason, when the slip preventing members 23 are fitted in the fitting grooves 22 on both side surfaces of the ring body 21, the slip preventing members 23 protrude from the side surface 21a of the ring body 21 by a predetermined amount over the entire circumference. However, the protruding amount of both ends of the anti-slip member 23 is smaller than all the remaining portions. This structure, with the attachment ring R ₁ to the recess 11 of the inner conduit P are disposed, when said mounting attachment ring R ₁ is moved in the groove width direction within the concave portion 11, attachment ring R ₁ The anti-slip member 23 fitted on both side surfaces of the anti-slip member is in contact with and in close contact with one of the opposing inner surfaces of the recess 11, but at the time of this contact, the protruding amount at both ends of the anti-slip member 23 remains. Therefore, the “continuous contact contact length” is increased in order for the “remaining all portions” to continuously contact and adhere to one of the opposing inner surfaces of the recess 11. It can be secured. For this reason, when the bell mouth B is pushed and inserted into the inside thereof from the end of the conduit P, the attachment ring R ₁ is effectively prevented from being rotated around the conduit P.

The reason why the fitting grooves 22 are formed on both side surfaces of the ring main body 21 and the slip prevention member 23 is fitted in each fitting groove 22 is as follows. That is, as will be described later, among the anti-slip members 23 fitted on both side surfaces of the ring body 21, it is disposed in the recess 11 inside the conduit P that serves to stop the attachment ring R _1. In this state, only the anti-slip member 23 on the near side facing the collar portion 14 of the bell mouth B inserted into the conduit P is provided, but the attachment ring R ₁ is arranged in any state with respect to the conduit P. Even when the attachment ring R ₁ is disposed in the recess 11 at the inner end of the conduit P at the construction site in such a manner that the anti-slip member 23 that faces the flange 14 of the bell mouth B exists. In addition, this is to avoid the trouble of distinguishing the front and back of the attachment ring R ₁ .

Next, the case where the bell mouth B is attached to the end portion of the conduit P connected to the manhole M for performing the relay connection of the underground cable using the attachment ring R ₁ will be described. As shown in FIGS. 1 and 8, the side wall 1 of the manhole M has a horizontal through hole 3 for inserting the end of the conduit P, and the end of the conduit P is A gap 4 inserted between the through hole 3 and the conduit P is filled with a filler such as mortar 5. The insertion state of the end portion of the conduit P with respect to the through hole 3 is arranged slightly inside the inner wall surface 2 of the side wall 1 (referred to as being located inside the through hole 3). It needs to be in a state. Before inserting the conduit P into the through hole 3, the attachment ring R ₁ is disposed in the recess 11 closest to the end face of the conduit P. The arrangement of the attachment ring R ₁ is a state in which the said mounting attachment ring R ₁ was reduced in diameter by elastic deformation, is inserted into the inside from the end face opening of the conduit P, when open at the location of the first recess 11 The diameter-reduced attachment ring R ₁ is restored to its original shape by an elastic restoring force and disposed in the recess 11 of the conduit P. In this way, in the state where the attachment ring R ₁ is disposed in the concave portion 11 of the conduit P, the attachment ring R is more than the inner diameter (d ₂ ) of the convex portion 12 portion of the conduit P (see FIG. 10). _Since the inner diameter (d ₁ ) of one female thread portion 24 is smaller, the female thread portion 24 formed on the inner peripheral surface of the attachment ring R ₁ is at the center with respect to the inner peripheral surface of the conduit P. It projects by a predetermined length.

Then, after the filler such as the mortar 5 filled in the gap 4 between the through hole 3 of the manhole M and the distal end portion of the conduit P inserted into the through hole 3 is cured, as shown in FIG. Then, the body portion 13 of the bell mouth B is pushed into the inside of the conduit P from the inside of the manhole M and inserted therein. A slight gap 10 is formed between the distal end surface of the conduit P inserted into the through hole 3 and the inner wall surface 2 of the side wall 1 of the hand hole H. As a result, the inner diameter (d ₁ ) of the female screw portion 24 formed on the inner peripheral surface of the attachment ring R ₁ is larger than the outer diameter (D ₁ ) of the male screw portion 15 formed on the main body portion 13 of the bell mouth B. Since it is slightly smaller, the body portion 13 of the bell mouth B is pushed in from the end opening of the conduit P in a state where the attachment ring R ₁ is disposed in the recess 11 near the opening end surface of the conduit P. in the inserted, the inclined surface 15b of the threads 15a of the external thread portion 15 of the bellmouth B facing the attachment ring R ₁ is the side surface 24b of the threads 24a of the female screw portion 24 of the attachment ring R ₁ (precisely, since the intersection edge portion) of the side surface 24b and the inner peripheral surface 24c has a contact with dimensions, the pressing force of the attachment ring R _1, attachment ring R ₁ is inclined surface 15b of the external thread portion 15 of the bellmouth B Mounting ring by moving relatively along _1, the bell by being expanded by elastic deformation, and changed to the state shown in the (b) from the state shown in FIG. 9 (b), to restore the original shape by the passage of a single thread 15a The body part 13 of the mouse B is allowed to pass. Thereby, the attachment ring R ₁ repeats the expansion of the diameter and the restoration to the original shape, and the main body portion 13 of the bell mouth B is inserted into the end portion of the conduit P. Therefore, the bell mouth B in which the male screw portion 15 is formed on the outer peripheral surface of the main body portion 13 does not rotate in the conduit P in which the attachment ring R ₁ having the female screw portion 24 is disposed. It is pushed and inserted.

Here, the attachment ring R ₁ is disposed in the recess 11 inside the conduit P with a predetermined gap along the groove width direction of the recess 11 (longitudinal direction of the conduit P). Therefore, only by pushing the main body 13 of the bell mouth B into the conduit P as described above, most of the main body 13 is inserted into the conduit P, but a slight “ It has a backlash. For this reason, in the state in which the main body portion 13 of the bell mouth B is inserted into the conduit P, that is, the male screw portion 15 of the main body portion 13 of the bell mouth B and the female screw portion 24 of the attachment ring R ₁ are screwed together. In this state, when the bell mouth B is rotated with respect to the conduit P in the direction in which the bell mouth B is inserted (usually in the clockwise direction), the body portion 13 of the bell mouth B is inserted to the maximum with respect to the conduit P. Therefore, attachment ring R ₁ is slightly moved to the side of the flange portion 14 of the bellmouth B, it is fitted to the flange portion 14 facing the fitting groove 22 of the ring body 21 of the attachment ring R ₁ The anti-slip member 23 contacts the inner wall surface 11a of the recess 11 of the conduit P (see FIG. 10). In this state, when the further rotation of the bellmouth B, the state where the anti-slip member 23 to abut the inner wall surface 11a of the recess 11 of the conduit P, brought about the attachment ring R ₁ is prevented Thus, the rubber anti-slip member 23 is slightly compressed and deformed. In this state, the anti-slip member 23 of the attachment ring R ₁ is in close contact with the inner wall surface 11 a on the side of the collar portion 14 of the bell mouth B in the concave portion 11 of the conduit P, and the collar portion of the bell mouth B 14 is in close contact with the inner wall surface 2 of the side wall 1 of the manhole M so that no “backlash” occurs, and the end of the conduit P inserted into the through hole 3 of the manhole M A bell mouth B is attached to. In particular, in the first embodiment, even if a slight gap 10 is formed between the distal end surface of the conduit P inserted into the through hole 3 and the inner wall surface 2 of the side wall 1 of the hand hole H, A state in which the inner side surface 14a of the collar portion 14 of the bell mouth B is brought into contact with the inner wall surface 2 of the side wall 1 of the handhole H by pulling the attachment ring R ₁ toward the collar portion 14 side of the bell mouth B by rotation. Thus, the structure is characterized in that the bell mouth B is attached to the end of the conduit P. Here, the screw thread of the female screw portion 24 formed on the attachment ring R ₁ is a square “square screw”, and the screw thread of the male screw portion 15 formed on the main body portion 13 of the bell mouth B is a saw. Since the female threaded portion 24 of the attachment ring R ₁ which is a blade-like and “square thread” is screwed with the vertical surface 15 c of the thread 15 a of the male threaded portion 15 of the bell mouth B, substantially “ "Square screws" are screwed together. For this reason, the coupling force between the bell mouth B and the attachment ring R ₁ , in other words, the bell mouth B and the conduit P is increased, and a structure that does not loosen over a long period of time is realized.

Further, in addition to the bell mouth B for guiding the drawing and drawing of the electric wire, the end opening of the electric wire P is closed as shown in FIG. 1 in the manhole M of the electric wire P. In some cases, the cap 6 or the auxiliary tube lid 7 that closes the opening of the end surface entering the manhole M of the auxiliary electric conduit P may be attached. In such a cap 6 or spare tube lid 7, as in the case of the bell mouth B, a male screw portion is formed on the outer periphery of the main body of the cap 6 or spare tube lid 7, and the end of the conduit P and disposing the attachment ring R ₁ to the recess 11 of the inner, by pushing the cap 6 or the spare tube for lid 7 with respect to said mounting attachment ring R _1, conduit via the attachment ring R ₁ The cap 6 or the spare tube lid 7 can be securely and quickly attached to the end of the P without any play. When the cap 6 or the spare tube lid 7 is attached to the end portion of the conduit P, the rods formed at the end of the cap 6 or the spare tube lid 7 in the longitudinal direction are directly on the end surface of the conduit P. The configuration of attaching the bell mouth B is different from the configuration of attaching the bell mouth B to the end of the conduit P connected to the side wall 1 of the manhole M. In FIG. 1, 8 is a cubicle installed on the ground, and 9 is a connector for connecting the conduit P extending on the ground to the side wall 1 of the manhole.

  In the first embodiment, the end portion of the conduit P is inserted into the through hole 3 in the side wall 1 of the manhole M, and the gap 4 between the through hole 3 and the conduit P is filled with a filler such as mortar 5. The bell mouth B is inserted and attached to the end of the conduit P from the inside of the manhole M in a state where the end of the conduit P is fixed to the side wall 1 by hardening of the filler. In the second embodiment, a side wall (connected wall) 51 of a resin hand hole H is sandwiched between the end face of the electric pipe P and the flange 14 of the bell mouth B, and the electric pipe P is connected to the side wall 51. In this structure, only the unique parts of the second embodiment will be described in detail while avoiding redundant explanation with the first embodiment.

  FIG. 11 is a half cross-sectional view of a state in which the conduit P is connected to the side wall 51 of the resin hand hole H by the attachment structure according to the present invention, and FIG. 12 is a connection of the conduit P in FIG. It is a partial expanded sectional view of a part. The connecting portion of the side wall 51 of the hand hole H is formed with a through-hole 52 having a size that allows the body portion 13 of the bell mouth B to be inserted, and the conduit P has an inner concave portion 11 (an outer convex portion). The end face of the conduit P, which is the cut surface, is in contact with the outer surface of the side wall 51 of the handhole H and holds the side wall 51 in cooperation with the bell mouth B. It is a clamping end face 18.

In order to connect the conduit P to the side wall 51 of the handhole H, the attachment ring R ₁ is previously disposed in the nearest recess 11 inside the conduit P in the same manner as in the first embodiment. The outside of the hand hole H passes through the body 13 of the bell mouth B from the inside of the hand hole H through the through hole 3 with the clamping end face 18 of the conduit P being in contact with the periphery of the through hole 52. Then, when it is pushed into the inside of the conduit P, the diameter of the attachment ring R ₁ is increased by contact with the thread 15a of the external thread 15 on the outer periphery of the body 13 of the bell mouth B, as in Example 1. The restoration to the original shape is repeated, and most of the main body 13 of the bell mouth B is inserted into the conduit P through the through hole 52 of the hand hole H.

Finally, when the bell mouth B is rotated in a predetermined direction in the hand hole H, the play slightly changes along the groove width direction (longitudinal direction of the conduit P) in the recess 11 inside the conduit P. The fitting ring R _{1 in the} fitted state is drawn to the side of the collar part 14 of the bell mouth B and is brought into close contact with the inner wall surface 11 a on the side of the collar part 14 of the bell mouth B in the concave part 11 of the conduit P. The As a result, the side wall 51 of the handhole H is sandwiched between the pinching end surface 18 of the conduit P and the flange portion 14 of the bell mouth B without any gap, and the end of the conduit P is connected to the handhole H. Connected to the side wall 51. Thus, in order to insert the bell mouth B into the end portion of the conduit P, the bell mouth B is simply pushed into the conduit P and does not need to be rotated. Can be installed quickly. In FIG. 11, reference numeral 53 denotes a lifting prevention flange whose upper part is covered with earth to prevent the handhole H from being lifted up when buried in the ground, and 54 denotes the handhole H. The installation part of the cover body which covers the upper surface opening is shown.

In the second embodiment, the bell mouth B is fastened with the side wall 51 of the handhole H sandwiched between its own flange 14 and the sandwiching end face 18 of the conduit P, and is referred to as a “tightened body”. Is also functioning. For this reason, the mounting ring R ₁ disposed in the recess 11 inside the conduit P and the female screw of the mounting ring R ₁ inserted into the conduit P through the side wall 51 of the handhole H It functions as a “connector” for connecting the conduit P to the side wall 51 of the handhole H by the bell mouth B having the male screw portion 15 screwed to the portion 24. As another embodiment of the “conduit attachment structure” of Example 2, which is characterized in that the conduit is sandwiched and attached to the connected wall, for example, on the side wall of the wiring box, In the case of connecting a conduit by inserting a tightening body from the inside, the “conduit attachment structure” of the second embodiment is applicable.

FIG. 13 is a cross-sectional view of a state in which the conduit P is connected by a coupling C ₁ in which the main body portion 13 ′ is inserted into the conduit P. The cylindrical coupling C ₁ has a flange portion 14 ′ formed at the center in the axial direction of the main body portion 13 ′ and the same direction on the outer peripheral surface on both sides of the flange portion 14 ′ (right direction in the illustrated example). The male screw part 15 is formed. However, the saw-toothed thread 15a has a relationship in which the male screw parts 15 on both sides sandwich the flange part 14 'and are reversed left and right. In order to connect the conduits P using the coupling C ₁ , the attachment ring R ₁ is disposed in the recess 11 inside the end of each conduit P, and one conduit P in the same manner as the bell mouth to an end B of the 'one side of the main body portion 13' of the flange portion 14 after it is pushed into the end of the conduit P in the coupling C _1, by rotating the coupling C ₁ Screw the coupling C ₁ onto the end of one conduit P. Then, after it pushed the other conduit P in 'the body portion 13 of the other side of the' flange portion 14 in the coupling C _1, when screwed by rotating the other conduit P, the two conduits P The two conduits P are connected via the coupling C ₁ in a state where the opposing end faces are in contact with both side faces of the flange 14 '. If the directions of the male screw portions 15 formed on both sides of the flange portion 14 'are reversed, the conduit P is pushed into the main body portion 13' on both sides of the flange portion 14 ', and the coupling C ₁ When the is rotated, each conduit P is moved and screwed so as to be close to each other.

In each of the first to third embodiments, the attachment ring R ₁ is disposed in the concave portion 11 inside the conduit P, and the main body of the attachment body such as the bell mouth B is pushed into the conduit P. by inserting a male screw portion formed on the outer peripheral surface of the main body portion of the attachment member, by screwing the female thread portion 24 formed on the inner peripheral surface of the attachment ring R _1, via the attachment ring R ₁ In the third embodiment, the attachment ring R ₂ is disposed in the concave portion 11 ′ on the outer side of the conduit P, and the inner peripheral surface is attached to the end portion of the conduit P. A male screw portion 44 formed on the outer peripheral surface of the attachment ring R ₂ by inserting and inserting the end portion of the conduit P inside the attachment body (coupling C ₂ ) formed with the female screw portion; by screwing between the attachment member internally threaded portion 33 (34) of the inner peripheral surface of the (coupling C _2), the electric wire through the attachment ring R ₂ It is characterized by attaching the attaching member in the state of covering the outer end portion of the P (coupling C _2). Accordingly, the first and second embodiments are different from the third embodiment only in that the relationship between the male screw portion and the female screw portion formed on the attachment ring and the attachment body, respectively, is reversed. The structure which can attach an attachment body to the edge part of a conduit tube is common only by pushing in an attachment body, without rotating an attachment body with respect to a conduit tube. Therefore, regarding the description of the fourth embodiment, only the differences will be described in detail while avoiding the redundant description with the first to third embodiments.

FIG. 14 is a perspective view in which a part of the attachment ring R ₂ disposed in the recess 11 ′ outside the conduit P and the coupling C ₂ for connecting the conduits P is broken. 15 is a cross-sectional view of the central portion of the attachment ring R ₂ , FIG. 16 is a cross-sectional view of a state in which the conduit P is inserted on one side of the coupling C ₂ , and FIG. FIG. 18 is a cross-sectional view of the state where the ends of the conduit P are inserted on both sides of C ₂ , and FIG. 18 is a cross-sectional view of the state where the conduits P are connected to each other via the coupling C ₂ . is a sectional view showing an action of conduit P is inserted pushed against the coupling C _2. The coupling C ₂ connects the conduits P, and the inner peripheral surface of the cylindrical main body 31 has a partition rib 32 at the center in the axial direction as a boundary on both sides thereof. In this configuration, female thread portions 33 and 34 each having a reverse thread relationship are formed. The pitches of the female thread portions 33 and 34 are both (S ₂ ), and the screw threads 33a and 34a are both saw-toothed, and the surface facing the inserted conduit P is respectively In addition to the inclined surfaces 33b and 34b, the other surfaces are vertical surfaces 33c and 34c. In the state shown in the drawing, the female screw portions 33 and 34 on the right side and the left side of the partition bar 32 are respectively “right screw” and “left screw”.

The attachment ring R ₂ is a member that is disposed in the concave portion 11 ′ outside the conduit P and forms a male screw portion on the outer peripheral surface of the conduit P, and is the same as the attachment ring R _1. The ring body 41 is formed of a synthetic resin, and a part of the ring is removed, and the outer peripheral surface receives a force directed radially inward, so that the diameter can be reduced by elastic deformation. It is comprised with a pair of rubber | gum anti-slip | skid members 43 fitted by the circular arc-shaped fitting groove 42. As shown in FIG. The ring body 41 is a shape in which a part of the ring is omitted as a whole shape, and the cross-sectional shape of the ring body 41 is a substantially trapezoidal shape whose outer side is slightly wider than the inner side. Is formed of “square screws” over the entire circumference, and male screw portions 44 are formed at the same pitch as the pitch (S ₂ ) of the respective female screw portions 33 and 34 of the attachment ring R ₂ . Here, as shown in FIG. 16, in the non-deformed state (the state where the diameter is not reduced) of the attachment ring R ₂ , the outer diameter (D ₂ ) of the male screw portion 44 is the respective female screw portion of the coupling C _2. As shown in FIG. 19, the attachment ring R ₂ is disposed in the outer concave portion 11 ′ closest to the end face of the conduit P, which is slightly larger than the inner diameter (d ₃ ) of 33 and 34. state, when pushing the electric wire tube P from the end-face opening of the coupling C ₂ therein, threads 33a of the external thread portion 44 is internally threaded portion 33 of the coupling C ₂ of an attachment ring R ₂ (34) (34a) The attachment ring R ₂ is brought into contact with the inclined surface 33b (34b) of the first surface, and receives a force directed radially inward from the inclined surface 33b (34b). 34b), the original shape is restored, and then the next tilt Receiving a similar effect by the surface 33b (34b). As a result, the attachment ring R ₂ repeats the reduction in diameter and restoration to the original shape, and the end of the conduit P in which the attachment ring R ₂ is disposed in the outer recess 11 ′ closest to the end face. The part is inserted into the coupling C ₂ as shown in FIG. In the third embodiment, unlike the first and second embodiments, in the state in which the attachment ring R ₂ is disposed in the recess 11 ′ outside the conduit P, the inside of the recess 11 ′ There is almost no gap between the wall surface 11'a.

Then, on the inner peripheral surface of the coupling C ₂ , female screw portions 33 and 34 having a reverse screw relationship are formed on both sides of the central portion in the axial direction, respectively, and the female screw portions 33 and 34, Since the male thread portion 44 of each attachment ring R ₂ disposed outside the conduit P is screwed together, as shown in FIG. 17, the connection is made from the openings at both ends of the coupling C ₂ . in the state of inserting the end of the conduit P to, when rotating the coupling C ₂ in a predetermined direction, each conduit P whose ends are inserted into the coupling C ₂ is moved further closer direction Each conduit P is tightened against the coupling C ₂ via the attachment ring R _{2 in contact} with the partition flange 32 (see FIG. 18). At the time of rotation of the coupling C ₂ , the slip prevention member 43 on the side away from the end face of the conduit P abuts on the inner wall surface 11 ′ a of the recess 11 ′ outside the conduit P, and the attachment ring R ₂ is brought together. Around is prevented. Thus, two of the conduit P is connected via a coupling C _2.

Further, the in each embodiment 1 to 4, the inner circumference or inner parallel conduit P irregularities are provided alternately on the outer periphery or outside of the recess 11 (11 ') to the attachment ring R ₁ a (R ₂₎ This is an example in which a female thread portion is formed on the inner peripheral surface of the conduit P and a male thread portion is formed on the outer peripheral surface. However, the present invention can be implemented. In the case of a spiral conduit, the overall shape of the attachment ring disposed in the concave portion on the inner periphery or outer periphery thereof is a spiral shape corresponding to the concave and convex shape of the conduit tube.

Further, in each of the first to fourth embodiments, when the attachment body such as the bell mouth B, the coupling C ₁ , or C ₂ is rotated and tightened with respect to the conduit P, the attachment rings R ₁ and R _{2 are used.} As an anti-rotation means for preventing the rotation of the ring body, rubber slip prevention members fitted to the side surfaces of the ring main bodies 21 and 41 are cited. However, by forming protrusions on both side surfaces of the ring main bodies 21 and 41, It is also possible to increase the sliding resistance in the rotational direction.

It is a longitudinal cross-sectional view of the manhole M to which the electric pipe P which attached bellmouth B etc. to the edge part of the electric pipe P was connected by the attachment apparatus which concerns on this invention. The attachment ring R ₁ disposed in the recess 11 of the inner conduit P, is a perspective view of the bellmouth B, which is attached to an end portion of the conduit P through the said mounting attachment ring R _1. FIG. It is a perspective view of an attachment ring R _1. It is also a front view. FIG. 6 is a sectional view taken along line XX of FIG. 5. (A), (B), and (C) are enlarged sectional views taken along lines Y ₁ -Y ₁ , Y ₂ -Y _2, and Y ₃ -Y _{3 in} FIG. 5, respectively. It is sectional drawing of the state which has pushed the bellmouth B into the edge part of the electric pipe P fixed to the side wall 1 of the manhole M with the mortar 5. FIG. (A) and (B) are partial enlarged cross-sectional views in a state in which the attachment ring R ₁ is in an original shape and an enlarged shape in the middle of pushing the bell mouth B into the end portion of the conduit P, respectively. It is sectional drawing of the state in which the bellmouth B was pushed in into the edge part of the conduit P. It is a half sectional view in the state where electric conduit P was connected to side wall 51 of resin handhole H by the attachment structure concerning the present invention. It is a partial expanded sectional view of the connection part of the conduit P of FIG. The body portion 13 'is a cross-sectional view of a state where the conduit P is connected by a coupling C ₁ form which is inserted into the conduit P. The attachment ring R ₂ disposed in the recess 11 'of the outer conduit P, is a broken perspective view of part of coupling C ₂ for connecting to what conduit P. It is a cross-sectional view of the central portion of the attachment ring R _2. One conduit P on the side of the coupling C ₂ is a cross-sectional view of a state of being inserted. End of the conduit P on both sides of the coupling C ₂ is a cross-sectional view of a state of being inserted. It is a cross-sectional view of a state in which what conduit P is connected via a coupling C _2. Is a sectional view showing an action of conduit P is inserted pushed against the coupling C _2.

Explanation of symbols

B: Bellmouth (attachment)
C ₁ and C ₂ : Coupling (attachment)
P: Conduit (pipe)
R ₁ , R ₂ : Attachment ring (attachment member)
11, 11 ': Concave portion of the conduit
11a, 11′a: inner wall surface of the concave portion of the conduit
13: Bellmouth body (insertion section)
13 ': Coupling body (insertion part)
14: Belmouth's buttocks
14 ': Coupling buttocks
15, 15 ': Male thread part (screwing protrusion of the attachment body)
15a, 24a, 33a, 34a: Thread
23, 43: Anti-slip member (anti-rotation member)
24: Female thread portion (threaded projection of the mounting member)
33, 34: Female thread portion (screw fitting protrusion of the mounting body)
44: Male thread part (threaded projection of the mounting member)

Claims (9)

An attachment device for an attachment body attached to a tubular body having parallel or spiral irregularities formed continuously in the longitudinal direction on the inner periphery,
An attachment body provided with an insertion portion to be inserted into the tube body, wherein a screw projection is provided on the outer periphery;
A ring-like shape in which a part in the circumferential direction is omitted is formed, and a threaded projection to be screwed with the threaded projection of the attachment body is provided on the inner circumference, and in the recess inside the tube body In the state where the anti-slip member is disposed, the anti-slip member for increasing the sliding resistance in the rotational direction against the opposing inner wall surface constituting the recess in the tubular body is integrally formed on at least the side surface on the insertion side of the attachment body on both sides. An attachment member that can be expanded and deformed to be restored to its original shape by its own elastic deformation in a state of being attached and disposed in a concave portion inside the tubular body,
In the state where the attachment member is disposed in the recess inside the tube, the insertion member is pushed into the tube and inserted to expand the diameter of the attachment member in the recess. The insertion portion is allowed to be inserted, and after the insertion portion is inserted, at least one of the attachment body or the attachment member is rotated, so that the screwing protrusion and the attachment portion of the attachment body are rotated. To a tubular body characterized in that the attachment body can be attached to the tubular body by screwing the threaded projection of the member and fastening the tubular body and the attachment body to each other. Mounting body attachment device. The at least one of the threaded protrusion and the threaded protrusion is characterized in that a surface facing at the time of insertion is inclined so as to facilitate the insertion of the insertion part of the attachment body. The attachment apparatus of the attachment body to the pipe body of 1. The attachment device for an attachment body to a pipe body according to claim 2 , wherein at least one of the screwing protrusion and the screwing protrusion is formed in a sawtooth shape in cross section. Attachment of the attachment member engaged projection formed on the outer periphery of the insertion portion of, the tube body according to claim 2 or 3, characterized in that it is formed in an inclined or cross serrated Mounting device. The preparative adherend, attached to the tube body according to any one of 4 to claims 1, characterized in that it is intended to be mounted alone on the end of the bell mouth, the tube body such as closure cap Body attachment device. The preparative adherend is a coupling for connecting the tubular body to each other, one of the four claims 1, wherein the tube into the socket of the securing member is configured to be connected The attachment apparatus of the attachment body to the pipe body as described in 2. A structure in which a tubular body in which parallel or spiral irregularities are continuously formed in the longitudinal direction on the inner periphery is attached to a connected wall such as a box or underground box,
An attachment body provided with an insertion portion provided with a threaded protrusion on the outer periphery and inserted into the tubular body, and a flange formed integrally with one end in the longitudinal direction of the insertion portion;
A ring-like shape in which a part in the circumferential direction is omitted is formed, and a threaded projection to be screwed with the threaded projection of the attachment body is provided on the inner circumference, and in the recess inside the tube body In the state where the anti-slip member is disposed, the anti-slip member for increasing the sliding resistance in the rotational direction against the opposing inner wall surface constituting the recess in the tubular body is integrally formed on at least the side surface on the insertion side of the attachment body on both side surfaces. With a mounting member that is attached and can be expanded in diameter to be restored to its original shape by its own elastic deformation in a state of being disposed in a recess inside the tubular body,
The attachment wall is disposed between the end surface of the tubular body and the flange portion of the attachment body, and the attachment member is disposed in a recess inside the tubular body. By inserting the insertion portion of the body into the tubular body and inserting it, the diameter of the attachment member is expanded in the recess to allow the insertion of the insertion portion, and after the insertion of the insertion portion, By rotating at least one of the attachment members and screwing the screwing protrusions of the attachment member and the screwing protrusions of the attachment member, the end portion of the tube body and the attachment member are engaged. An attachment structure for a tubular body, wherein the wall to be connected is sandwiched between a flange portion of the attachment body. An attachment device for an attachment body, which is attached to a pipe body having parallel or spiral irregularities formed continuously in the longitudinal direction on the outer periphery,
An attachment body provided with a threaded protrusion on the inner periphery and having an insertion portion for inserting an end portion of the tubular body into the interior;
A ring-like shape in which a part in the circumferential direction is missing is formed, and a threaded projection that is screwed with the threaded projection of the attachment body is provided on the outer periphery, and in the recess on the outside of the tubular body In the disposed state, at least the side surface on the insertion side of the attachment body on both side surfaces is integrally provided with an anti-slip member that increases the sliding resistance in the rotational direction with respect to the opposing inner wall surface forming the concave portion on the outer side of the tube body. attached to, in a state of being disposed outside in the recess of the tubular body, composed of a shrink deformation possible securing member in order to restore the original shape by its own elastic deformation,
In a state where the attachment member is disposed in the concave portion outside the tubular body, the end portion of the tubular body is pushed into and inserted into the insertion portion of the attachment body, whereby the attachment member is recessed. The diameter of the tube body is reduced to allow insertion of the end portion of the tube body, and after insertion of the end portion of the tube body with respect to the insertion portion, at least one of the attachment body or the attachment member is rotated. The threaded protrusion of the attachment body and the threaded protrusion of the attachment member are screwed together, and the tube body and the attachment body are fastened together to attach the attachment body to the tube body. An attachment device for attaching an attachment body to a tubular body, characterized in that attachment is possible. The said attachment body is a coupling which connects pipe bodies, The attachment apparatus of the attachment body to the pipe body of Claim 8 characterized by the above-mentioned.

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