JP4180501B2 - Attachment device for attachment body to tubular body, and attachment structure for tubular body - Google Patents

Description

  The present invention can securely attach various attachments such as bell mouths (drawing / drawing guides for wires), closing caps, connectors, couplings, etc., to a parallel tube without causing backlash. The present invention relates to an attachment device for an attachment body to a tubular body, and an attachment structure for the tubular body.

  When attaching a mounting body such as a bell mouth or a closure cap to the end of a tubular body provided with parallel irregularities on the inner surface, the mounting body is forcibly pushed into the end of the tubular body. Thus, the engaging protrusion provided on the outer peripheral surface of the attachment body is engaged with the concave portion of the inner peripheral surface of the tubular body for attachment (for example, Patent Document 1). Also, when connecting a pipe body to a connected body (connected wall) such as a wiring box or underground box, the fastening body is pushed into the tubular body from the inside of the connected body, The engaging protrusion is engaged with and connected to the concavo-convex portion inside the tube.

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.
Japanese Utility Model Publication No. 60-36998

  An object of the present invention is to make it possible to securely attach various attachments such as a bell mouth, a closure cap, a connector, and a coupling to a parallel tube body without causing “backlash”.

In order to solve this problem, the invention of claim 1 is an attachment device for attaching an attachment body to a tubular body in which parallel irregularities are continuously formed in the longitudinal direction on the inner periphery. An attaching body provided with a screwing protrusion and having an insertion portion inserted into the pipe body, and a screwing protrusion to be screwed with the screwing protrusion of the attaching body are provided on the inner periphery. And an anti-slip member that abuts against the inner wall of the concave portion of the tubular body to increase the sliding resistance in the rotational direction so as to prevent rotation in the concave portion while being disposed in the concave portion inside the tubular body. In the state where the attachment member is disposed in the concave portion inside the tube body, at least one of the attachment body or the attachment member is rotated to screw the attachment body. by screwing and Hinishigo projection of the securing member with engagement projections, allowing attached by the attachment member to the tube member screwed rotating operation only It is characterized in that.

According to the first aspect of the present invention, at least the attachment body or the attachment member is inserted in a state in which the insertion portion of the attachment body is inserted inside the attachment member disposed in the concave portion inside the parallel pipe body. rotating either, in a state where the rotation of the securing member is prevented with respect to the tube member, a threaded protrusion of the attachment member and Hinishigo projection of the securing member is screwed Thus , the tube body and the attachment body are fastened to each other via an attachment member. In this way, a threaded projection (female thread portion) can be formed on the inner peripheral surface of the parallel tubular body simply by disposing the attachment member in the concave portion inside the parallel tubular body. Thus, the attachment body is securely attached without any “backlash” or gaps. On the other hand, in order to remove the attachment body attached to the tubular body, it is only necessary to rotate at least one of the attachment body and the attachment member in the opposite direction.

The invention of claim 2 is characterized in that, in the invention of claim 1, the anti-slip member is provided on both side surfaces of the attachment member . As a result, it is possible to prevent the attachment member from being carried around together with the attachment body, so that each operation of attaching the attachment body to the parallel pipe body and removing the attachment body from the pipe body is ensured. Yes.

  The invention of claim 3 is the invention of claim 1 or 2, wherein the attachment member is restored to its original shape after being reduced in diameter by elastic deformation, and is disposed in the concave portion of the tubular body. It is said. According to the invention of claim 3, the diameter of the attachment member is reduced by elastic deformation. Therefore, the attachment member can be disposed in the concave portion inside the tube body with one touch.

  The invention of claim 4 is the invention according to any one of claims 1 to 3, wherein the attachment body is attached to an end portion of a tubular body such as a bell mouth or a closure cap. The bell mouth, the closing cap and the like can be firmly attached without causing a gap at the end of the tube body.

  The invention according to claim 5 is the invention according to any one of claims 1 to 3, wherein the attachment body is a connector for connecting a tubular body to a box or a coupling for connecting parallel tubular bodies to each other. And it is the structure which is connected to the receiving port of the said attachment body, It is characterized by the above-mentioned. A tubular body can be reliably connected without producing a clearance gap in the receiving port of the said connector or the said coupling.

Further, the invention of claim 6 is a structure for attaching a tubular body in which parallel irregularities are continuously formed in the longitudinal direction on the inner periphery to a connected wall such as a box or an underground box,
An attachment body provided with an insertion portion provided with a threaded projection on the outer periphery thereof and inserted into the tubular body, and a flange portion integrally formed at one end in the longitudinal direction of the insertion portion, and the attachment body In order to prevent rotation in the recess in a state in which a threaded projection to be screwed with the threaded projection is provided in the inner periphery and disposed in the recess inside the tube body, An attachment member provided with an anti-slip member that abuts against the inner wall and increases slip resistance in the rotational direction, and the connected wall is disposed between the end face of the tubular body and the flange portion of the attachment body Then, in a state where the attachment member is disposed in the concave portion inside the tube body, at least one of the attachment body or the attachment member is rotated, and the screw engagement of the attachment body by screwing and Hinishigo projection of the securing member and parts, and the flange portion of the an end portion of the pipe body by only screwing rotation operating attachment member It is characterized in that sandwich the target connecting wall between.

  According to the invention of claim 6, by pulling a parallel tube body toward the attachment body by the rotation of the attachment body, the tube body includes an end portion of the tube body and a flange portion of the attachment body. Since the connected wall such as a box or a buried box is sandwiched between the connected walls, the parallel pipe body can be securely connected to the connected walls without causing a gap. Can connect.

Further, the invention of claim 7 is an attachment device for attaching to a tubular body in which parallel irregularities are continuously formed in the longitudinal direction on the outer periphery, and a screw projection on the inner periphery. An attachment body provided with an insertion portion for inserting an end portion of the tube body therein, and a threaded projection portion screwed with a screwing projection portion of the attachment body, An attachment comprising an anti-slip member that abuts against the inner wall of the recess to increase the slip resistance in the rotation direction so as to prevent rotation in the recess while being disposed in the recess outside the tube. In the state in which the attachment member is disposed in the concave portion outside the tube body, at least one of the attachment body or the attachment member is rotated to screw the attachment body. by screwing and Hinishigo projections and engagement projections the securing member, the attachment member to the tube member to be secured only by screwing rotation operation It is characterized in that was.

  According to the seventh aspect of the present invention, the end of the parallel tube body can be screwed into the inserted portion of the attachment body, and the “backlash” can be made with the attachment body having no gap with respect to the tube body. It can be securely attached without any occurrence.

  The invention of claim 8 is characterized in that, in the invention of claim 7, the attachment body is a connector for connecting a tubular body to a box or a coupling for connecting tubular bodies. The connector or the coupling can be firmly attached without generating a gap between the end portions of the parallel pipe bodies.

According to the present invention, an attachment member is disposed in a concave portion on the inner side of a tubular body having parallel irregularities formed on the inner periphery in a state in which the slip resistance in the rotational direction is increased , thereby bringing the mounting member inside the tubular body. At least one of the attachment body and the attachment member is formed in a state in which a threaded protrusion (female thread portion) is formed in a state in which it is difficult to rotate, and an insertion portion of the attachment body is inserted inside the attachment member. By rotating one side and screwing the threaded protrusion of the attachment body and the threaded protrusion of the attachment member, the attachment body is attached to the parallel pipe body only by the screwing rotation operation. It can be securely attached without any play. In addition, even in a tubular body with parallel irregularities formed on the outside, a male threaded portion can be formed on the outside of the tubular body by disposing an attachment member in the concave portion on the outside, and the end of the tubular body is placed inside. The attachment body provided with the insertion portion to be inserted can be securely attached through the attachment member without generating “backlash” in the tube body.

  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.

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 from 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 inserted into the recess 11 of the conduit P. The ring main body 21 is elastically deformed so that the diameter of the ring main body 21 can be reduced, and a pair of anti-slip members 23 are fitted in the 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 substantially similar to the cross-sectional shape of the concave portion 11 inside the conduit P, and the inner side is A substantially trapezoidal shape that is slightly wider than the outside is formed, and an internal thread portion 24 having a square thread is formed on the entire inner peripheral surface. 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.

Further, the fitting grooves 22 provided on both side surfaces of the ring body 21 that can be reduced in diameter by elastic deformation are continuously provided in all parts except for both ends of the ring body 21. As shown in FIGS. 5 and 7, the depth of the center angle (α) from the both ends of the fitting groove 22 is deeper than the rest. 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. With this structure, in the state in which the attachment ring R ₁ is disposed in the concave portion 11 inside the conduit P, the protruding amount at both ends in the circumferential direction of the anti-slip member 23 is smaller than all the remaining portions. , Because “all parts except both ends” are in continuous contact and contact with the opposing inner surface of the recess 11, the “continuous contact close contact length” can be secured long, and the attachment ring for the conduit P R ₁ rotation is effectively prevented. Further, in the state where the attachment ring R ₁ is disposed in the concave portion 11 inside the conduit P, as shown in FIG. 9, the concave portion 11 is fitted with no gap in the width direction, and is attached. The anti-slip members 23 on both side surfaces of the ring R ₁ are in a state where they cannot be moved in the width direction of the concave portion 11 by elastically contacting the opposing inner side surfaces 11 a of the concave portion 11 of the conduit P. Accordingly, in a state in which the attachment ring R ₁ to the recess 11 of the inner conduit P are disposed, said attachment ring R ₁ is a state that does not move in either peripheral direction and the width direction of the concave portion 11 ing.

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 elastic restoring force, and is disposed (fitted) in the recess 11 of the conduit P without any gap along the width direction. The In this way, in the state where the mounting ring R ₁ is disposed in the concave portion 11 of the conduit P, the mounting ring R is more than the inner diameter (d ₂ ) of the convex portion 12 of the conduit P (see FIG. 9). _Since the inner diameter (d ₁ ) of the female thread portion ₁ (see FIG. 6) is smaller, the female thread portion 24 formed on the inner peripheral surface of the attachment ring R ₁ is formed on the inner peripheral surface of the conduit P. On the other hand, it protrudes by a predetermined length toward the center, and the internal thread portion 24 is partially formed inside the parallel conduit P (exactly, a portion slightly smaller than one pitch).

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. The body portion 13 of the bell mouth B is inserted into the inside of the manhole M through the opening of the end face of the conduit P, and the male screw portion 15 of the bell mouth B and the female screw portion 24 of the attachment ring R ₁ are brought into contact with each other. When the bell mouth B is rotated in a predetermined direction after contacting, the male screw portion 15 of the bell mouth B and the female screw portion 24 of the attachment ring R ₁ are screwed together, and the main body portion of the bell mouth B is connected to the conduit P. 13 is inserted. Finally, tightened bellmouth B, when brought into close contact with the inner surface 14a to the inner wall surface 2 of the manhole M, bellmouth B of the pair of anti-slip members 23 attached to both sides of the attachment ring R ₁ The anti-slip member 23 on the side of the collar portion 14 is slightly compressed and deformed, and the attachment ring R ₁ slightly moves toward the collar portion 14 side of the bell mouth B. Thereby, the bell mouth B is firmly attached to the end of the parallel conduit P. In addition, when the male screw portion 15 of the bell mouth B and the female screw portion 24 of the attachment ring R ₁ are screwed together during the final tightening, the vertical surface 15b of the male screw portion 15 and the side surface 24b of the female screw portion 24 are in close contact. For this reason, a substantially trapezoidal screw threaded structure is used, and, as described above, the flange portion of the bell mouth B of the pair of anti-slip members 23 mounted on both side surfaces of the attachment ring R _1. Since the anti-slip member 23 on the side facing 14 is slightly compressed and deformed, there is an advantage that the bell mouth B is firmly fixed to the conduit P without loosening. Further, in the first embodiment, as shown in FIG. 9, a bell is provided at the end of the conduit P with a predetermined gap 10 between the inner wall surface 2 of the manhole M and the end surface of the conduit P. The structure in which the mouse B is attached also has a feature.

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 said attachment ring R ₁ and disposed inside the recess 11, when screwing the cap 6 or the spare tube for lid 7 with respect to said mounting attachment ring R _1, via the attachment ring R ₁ wire The cap 6 or the spare tube lid 7 can be securely attached to the end portion of the tube P without causing “rattle”. 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 of the parallel conduit P is inserted into the through hole 3 in the side wall 1 of the manhole M, and a filler such as mortar 5 is placed in the gap 4 between the through hole 3 and the conduit P. Filled, with the end of the conduit P fixed to the side wall 1 by curing the filler, the bell mouth B is inserted into the end of the conduit P from the inside of the manhole M by screwing rotation and attached. However, in Example 2, the side wall (connected wall) 51 of the resin handhole H is sandwiched between the end face of the conduit P and the flange portion 14 of the bell mouth B, and In this structure, a parallel conduit P is connected to the side wall 51, and only the unique parts of the second embodiment will be described in detail, avoiding redundant explanation with the first embodiment.

  FIG. 10 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. 11 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). And the end face of the conduit P, which is the cut surface, abuts on the outer surface of the side wall 51 of the hand hole H and clamps the side wall 51 in cooperation with the bell mouth B. It is a clamping end face 18.

In order to connect the parallel 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. In the outside of the hand hole H, the body portion 13 of the bell mouth B is passed through the through hole 3 from the inside of the hand hole H in a state where the clamping end face 18 of the conduit P is brought into contact with the periphery of the through hole 52. was allowed to pass through and inserted into the conduit P, example 1 in the same manner as, the female screw portion 24 screw thread 15a of the male screw portion 15 of the outer periphery of the attachment ring R ₁ inside of the main body portion 13 of the bellmouth B Then, the bell mouth B is screwed and rotated and screwed into the inside of the conduit P. Finally, when the bell mouth B is strongly screwed in, the slip prevention member 23 on the side of the flange 14 of the bell mouth B among the anti-slip members 23 on both sides of the attachment ring R ₁ disposed in the recess 11 of the parallel conduit P is prevented. When the member 23 is slightly compressed and deformed and slightly moves toward the flange portion 14 of the bell mouth B, the side wall 51 of the handhole H is formed between the clamping end surface 18 of the conduit P and the flange portion 14 of the bell mouth B. The parallel conduit P is firmly attached to the side wall 51 of the handhole H while being firmly sandwiched. In FIG. 10, reference numeral 53 denotes a lifting prevention flange whose upper part is covered with earth in order to prevent the handhole H from being lifted up when buried in the ground. 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. 12 is a cross-sectional view of the state in which the conduit P is connected by a coupling C ₁ in which the main body 13 ′ is inserted into the parallel conduit P. The cylindrical coupling C ₁ has a flange portion 14 ′ formed at the axial center of the main body portion 13 ′, and male screw portions 15 in opposite directions on the outer peripheral surface on both sides of the flange portion 14 ′. 15 'is formed. In addition, the sawtooth-shaped thread 15a is also in a relationship in which the male threaded portions 15 and 15 ′ on both sides are reversed left and right with the flange portion 14 ′ interposed therebetween. In order to connect the parallel conduits P using the coupling C ₁ , an attachment ring R ₁ in which female screw portions 24 and 24 ′ in opposite directions are formed in the recesses 11 inside the conduits P, respectively. , 'sure you disposed flange portion 14 of the coupling C _1' R ₁ and externally fitted so the conduit P respectively on the outside of each side with the body portion 13 'of the, rotating the coupling C ₁ The electric pipes P are moved so as to be close to each other and screwed into the coupling C ₁ .

In each of the first to third embodiments, the attachment ring R ₁ is disposed in the recess 11 inside the parallel conduit P, and the attachment body such as the bell mouth B is rotated so that the main body of the attachment body. a male screw portion formed on an outer peripheral surface of the parts, by screwing the female thread portion 24 formed on the inner peripheral surface of the attachment ring R _1, attached to the end of the conduit P via the attachment ring R ₁ In the fourth embodiment, the attachment ring R ₂ is disposed in the concave portion 11 ′ outside the conduit P, and the female thread portion is formed on the inner peripheral surface (Example 4). The end of the conduit P is inserted inside the coupling C ₂ ), the male thread 44 formed on the outer peripheral surface of the attachment ring R ₂ , and the inside of the attachment (coupling C ₂ ) by screwing the internal thread portion 33 of the peripheral surface (34), mounted body in the state of covering the outer end of the conduit P via the attachment ring R ₂ (coupling It is characterized by attaching a _2). Therefore, Examples 1 to 3 and Example 4 differ only in that the relationship between the male screw part and the female screw part respectively formed on the attachment ring and the attachment body is reversed, and the diameter is expanded by elastic deformation. The structure which can attach an attachment body to a parallel conduit by rotation of an attachment body using the possible attachment ring is common. 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. 13 is a perspective view in which a part of the coupling ring R ₂ disposed in the recess 11 ′ outside the conduit P and the coupling C ₂ for connecting the conduits P is broken. 14 is a cross-sectional view of the central portion of the attachment ring R ₂ , and FIG. 15 is a cross-sectional view of a state in which the conduit P is inserted into one side of the coupling C ₂ by screwing rotation. FIG. 17 is a cross-sectional view of a state in which the end portions of the conduit P are inserted by screwing rotation on both sides of the coupling C ₂ , and FIG. 17 is a diagram of connecting the conduits P through the coupling C _2. is a cross-sectional view of a state, FIG. 18 is a sectional view showing an action of conduit P is inserted pushed against the coupling C _2. The coupling C ₂ connects the parallel 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. It is the structure by which the internal thread parts 33 and 34 which have the relationship of a reverse screw are formed in the both sides, respectively. 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 While being an inclined surface, the other surface is vertical surfaces 33b and 34b. 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 parallel conduit P and forms a male screw portion on the outer peripheral surface of the conduit P. The attachment ring R ₁ And a ring body 41 that is molded from a synthetic resin and that can be enlarged by elastic deformation by receiving a force directed radially outward on the inner circumferential surface by removing a part of the ring, It comprises a pair of rubber anti-slip members 43 fitted into arc-shaped fitting grooves 42 on both side surfaces. The ring main body 41 is a shape in which a part of the ring is omitted as a whole shape, and the cross-sectional shape thereof is substantially similar to the concave portion 11 ′ outside the conduit P, and the outside is inside. Compared to the substantially trapezoidal shape, the outer peripheral surface is composed of “square screws” over the entire circumference, and the pitches (S ₂₎ of the respective female thread portions 33 and 34 of the attachment ring R ₂ are formed. The male threaded portion 44 is formed at the same pitch as that of FIG. Therefore, as shown in FIG. 18, when the diameter of the attachment ring R ₂ is expanded by elastic deformation and opened at the concave portion 11 ′ outside the conduit P, the attachment ring R ₂ is attached to the concave portion 11 ′ outside the conduit P. A landing ring R ₂ is provided. In this arrangement state of the attachment ring R ₂ , the slip preventing members 43 on both sides of the ring body 41 are in elastic contact with the opposing inner wall surface 11a ′ of the recess 11 ′ and cannot move in the width direction of the recess 11 ′. In addition, it is in a state where it cannot rotate with respect to the conduit P, that is, a state where it does not slip. Here, as shown in FIG. 15, in the non-deformed state (the state where the diameter is not expanded) 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. 18, 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, 34. state, by rotating the coupling C ₂ with respect to the inserted conduit P the inner end of the coupling C _2, attachment ring R ₂ in the male screw portion 44 and the coupling C ₂ of the female thread portion 33 ( by screwing with 34), gradually increases the insertion length of the end portion of the conduit P is in coupling C _2, and the conduit P and coupling C ₂ parallel via the attachment ring R ₂ Connected.

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. 16, the connection is made from the openings at both ends of the coupling C ₂ . When the coupling C ₂ is further rotated in a predetermined direction in a state where the end portion of the power conduit P is inserted by a predetermined length by screwing rotation, each conduit P whose end portion is inserted into the coupling C ₂ is moves further closer direction, in contact with the partition flange portion 32, the conduit P is tightened against the coupling C ₂ via the attachment ring R ₂ (see FIG. 17). Thus, two of the conduit P is connected via a coupling C _2.

In addition, the attachment rings R ₁ and R ₂ of each of the _{first to} fourth embodiments have a structure that can be elastically deformed and can be attached to the tube body with a single touch, but are divided into two along the circumferential direction. You may make it the structure which attaches each divided body attached to the recessed part inside or outer side of a pipe body by adhesion | attachment etc.

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.

In each of the first to fourth embodiments, the male screw portion or the female screw portion formed on the bell mouth B, the couplings C ₁ and C ₂ and the attachment rings R ₁ and R ₂ is a “saw blade screw”. In addition, there is an advantage that the tightening force is large and the tightening is ensured, but a general “triangular screw” or other screws may be used.

It is a longitudinal cross-sectional view of the manhole M with which the conduit P which attached bellmouth B etc. to the edge part of the conduit 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. 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. Is a partially enlarged cross-sectional view of the connection portion of the conduit P in FIG. It is a cross-sectional view of a state where the main body portion 13 'by a coupling C ₁ form which is inserted into the parallel conduits P is two conduits P is connected. 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 in which it is inserted by screwing rotation. End of the conduit P on both sides of the coupling C ₂ is a cross-sectional view of the intermediate state that is inserted by screwing rotation. 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 (8)

An attachment device for an attachment body, which is attached to a tubular body having parallel 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;
In order to prevent rotation in the recessed portion in a state in which a threaded protrusion to be screwed with the threaded protrusion of the attachment body is provided on the inner periphery and disposed in the recessed portion on the inner side of the tube body. An attachment member provided with an anti-slip member that abuts against the inner wall of the concave portion of the tubular body and increases the sliding resistance in the rotational direction ,
In a state where the attachment member is disposed in the concave portion inside 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 attachment member An attachment device for attaching an attachment body to a tube body, wherein the attachment body can be attached to the tube body only by screwing rotation operation by screwing with the threaded projection of the tube. The attachment device for an attachment body to a pipe body according to claim 1, wherein the anti-slip member is provided on both side surfaces of the attachment member . 3. The attachment body to the tubular body according to claim 1, wherein the attachment member is reduced in diameter by elastic deformation and then restored to an original shape and disposed in a concave portion of the tubular body. Landing gear. 4. The attachment to a tubular body according to claim 1, wherein the attachment body is a single body attached to an end of a tubular body such as a bell mouth or a closure cap. 5. Body attachment device. The attachment body is a connector for connecting a pipe body to a box or a coupling for connecting pipe bodies, and the pipe body is connected to a receiving port of the attachment body. The attachment device for an attachment body to a pipe body according to any one of claims 1 to 3. It is a structure that attaches a tubular body in which parallel irregularities are continuously formed in the longitudinal direction on the inner circumference to a connected wall such as a box or an 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;
In order to prevent rotation in the recessed portion in a state in which a threaded protrusion to be screwed with the threaded protrusion of the attachment body is provided on the inner periphery and disposed in the recessed portion on the inner side of the tube body. An attachment member comprising an anti-slip member that abuts against the inner wall of the recess to increase the sliding resistance in the rotational direction ,
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 rotating at least one of the body or the attachment member and screwing the screwing protrusion of the attachment body and the screwing protrusion of the attachment member, the screwing rotation operation is performed alone. An attachment structure for a tubular body, wherein the connected wall is sandwiched between an end portion of the tubular body and a flange portion of the attachment body. An attachment device for an attachment body, which is attached to a tubular body having parallel 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;
In order to prevent rotation in the recess in a state in which a threaded protrusion to be screwed with the threaded protrusion of the attachment body is provided on the outer periphery and disposed in the recess on the outside of the tube body , An attachment member comprising an anti-slip member that abuts against the inner wall of the recess to increase the rotational resistance in the rotational direction ;
In a state in which the attachment member is disposed in the concave portion outside 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 Attaching the attachment body to the tube body, wherein the attachment body can be attached to the tube body only by screwing rotation operation by screwing the attachment protrusion of the attachment member. apparatus. 8. The attachment body according to claim 7, wherein the attachment body is a connector for connecting the tube body to a box or a coupling for connecting the tube bodies to each other. apparatus.

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