JP2008278734A - Piping connecting structure and fixing member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping connecting structure and a fixing member which easily conducts a connection work of a main pipe to a duct sleeve and certainly prevents a position of a sheath pipe duct sleeve from shifting in the duct sleeve. <P>SOLUTION: The piping connecting structure is provided with a control means 45 between the duct sleeve 14 set in a wall body 13a to regulate a work hole 13 and the fixing member 27 for fixing the sheath pipe duct sleeve 32 housed in the duct sleeve to the duct sleeve 14. The control means 45 controls a shift of the fixing member along an axis direction of the duct sleeve 14 and a rotation of the duct sleeve 14 around the axis at a prescribed insert position of the fixing member 27 into the duct sleeve 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention defines, for example, a working tube for relaying a cable accommodated in a sheath tube in which the cable is accommodated in a sheath tube that accommodates the cable when the cable is buried in the ground and a main tube that accommodates the sheath tube. The present invention relates to a pipe connection structure and a fixing member suitable for use in connecting to a wall body.

  Conventionally, when, for example, an optical communication cable is embedded in the ground, a plurality of sheath tubes in which the optical communication cable is accommodated are inserted into the main pipe embedded in the ground, thereby providing an optical communication tube. It is known to form a path (see, for example, Patent Document 1). Each sheath tube is made of a synthetic resin material having heat stretchability such as polyvinyl chloride.

  In the middle of such a pipeline, a plurality of work holes are provided at predetermined intervals for connection between the cable accommodated in each sheath tube and another cable, inspection of the connection, and the like. A wall body defining each working hole is provided with a cylindrical duct sleeve extending linearly from the wall body to the side thereof and connecting the main pipe and each sheath pipe to the wall body.

  For each connection between the main pipe and each sheath pipe and the duct sleeve, a connection pipe called a Lotus pipe is used. The Lotus pipe has a connection end portion to which an end portion of the main pipe is connected at one end portion, and an insertion end portion to be inserted into the distal end portion of the duct sleeve at the other end portion. A plurality of cylindrical sheath tube duct sleeves are accommodated in the Lotus tube.

  Each of the sheath tube duct sleeves has an insertion end portion at one end portion thereof, and an end portion of each sheath tube inserted into the sheath tube duct sleeve so as to be relatively displaceable in the axial direction thereof. The length dimension of each sheath pipe duct sleeve allows thermal expansion and contraction of the sheath pipe inserted into each sheath duct duct sleeve and is along the axis of the sheath pipe due to vibration applied to the sheath pipe when an earthquake occurs. It is set to a length that allows it to move. Each sheath pipe duct sleeve is integrally fixed to the lotus pipe via a fixing member provided in the lotus pipe. Each sheath pipe duct sleeve is transported to the construction site in a state assembled to the Lotus pipe.

  When forming the pipe line between two working holes, first, one duct sleeve provided at the wall of one working hole with the insertion end of the Lotus pipe on the starting point side where each sheath pipe duct sleeve is fixed After connecting the start side lotus pipe to the one duct sleeve by inserting it from the outside of the working hole, the end of the main pipe is connected to the connection end of the start side lotus pipe, and each sheath pipe The end of each sheath pipe in the main pipe is inserted into the insertion end of each sheath pipe duct sleeve so that the expansion allowance and the movement allowance are secured in each sheath pipe duct sleeve. This prevents each sheath tube from coming out of each sheath tube duct sleeve when each sheath tube is relatively displaced with respect to each sheath tube duct sleeve during thermal expansion and contraction of each sheath tube and during movement due to an earthquake. . By connecting the main pipe and each sheath pipe to the starting point side Lotus pipe and each sheath pipe duct sleeve, respectively, the main pipe and each sheath pipe are connected via the starting point side Lotus pipe, each sheath pipe duct sleeve, and the one duct sleeve. Connected to the wall of the one working hole.

  Next, the end-point-side lotus pipe having a plurality of sheath pipe duct sleeves fixed thereto is connected to the other duct sleeve provided in the wall of the other working hole in the same manner as described above, and the terminal is placed in each sheath pipe duct sleeve. Insert a sheath tube.

  Subsequently, a plurality of other main pipes are sequentially connected in series to the main pipe connected to the starting point side Lotus pipe, and the other plurality of sheath pipes are connected to the respective sheath pipes inserted into the respective sheath pipe duct sleeves. Are sequentially connected in series. At this time, in many cases, a distance larger than the length of the single main pipe between the last main pipe closest to the other working hole and the end-side lotus pipe among the main pipes connected in sequence. Therefore, the final main pipe and the sheath pipe in the main pipe and the end-point side Lotus pipe and the sheath pipe duct sleeve in the lotus pipe cannot be directly connected to each other. Therefore, an adjusting pipe for connecting them to each other is arranged between the final main pipe and the end-side lotus pipe. The adjusting pipe has a length smaller than the interval between the final main pipe and the end-side lotus pipe, and has a pipe body into which a plurality of sheath pipes are inserted, and is fitted to the pipe body. And a slide tube slidable along the axis of the main body. By sliding the slide tube, the overall length of the adjustment tube can be adjusted.

  When the adjustment pipe is used to connect the final main pipe, the sheath pipe in the main pipe, the end-point side Lotus pipe, and the sheath pipe duct sleeve in the lotus pipe, the so-called exchange connection described below is performed. That is, first, each sheath tube inserted into the tube body of the control tube is pulled out from one end of the tube body, and each pulled-out sheath tube is connected to each sheath tube in the final main tube with the final main tube and the control tube. After connecting each with a space between the pipe main body, one end of the pipe main body is connected to the final main pipe. Subsequently, the terminal sheath tube is pulled out from the inside of each sheath tube duct sleeve in the end point side Lotus tube, and the main tube of the adjusting tube and the end point side lotus are connected to each of the terminal tube and each sheath tube in the tube body of the adjusting tube. Connect with each other in the space between the tubes. Thereafter, the slide tube is moved toward the end point side Lotus tube, and the slide tube and the end point side Lotus tube are connected to each other so that the slide tube is straddled between the tube main body and the end point side Lotus tube.

  As a result, the final main pipe and the end-point side Lotus pipe are connected to each other via the adjustment pipe, and the pipe line is formed between the two working holes.

  In addition to the above-described pipe connection structure, there is known a structure in which each sheath pipe duct sleeve is integrally fixed to the duct sleeve via a fixing member provided in the duct sleeve (for example, Patent Document 2). reference.). In this structure, the end of each sheath tube is inserted into the insertion end of each sheath tube duct sleeve so that the expansion allowance and movement allowance of each sheath tube are secured in each sheath tube duct sleeve. The end of the tube is inserted into the tip of the duct sleeve.

  According to this structure, since the fixing member for fixing each sheath pipe duct sleeve is provided in the duct sleeve, the above-mentioned lotus pipe can be made unnecessary. Thereby, since the number of parts required for the connection of the main pipe | tube and each sheath pipe | tube to the wall body of a working hole can be reduced, reduction of piping cost can be aimed at.

  However, when the main pipe and each sheath pipe are connected to the wall body using the Lotus pipe as in the invention described in Patent Document 1, each sheath pipe duct sleeve is integrally fixed to the Lotus pipe via a fixing member. Therefore, the position of each sheath pipe duct sleeve within the duct sleeve is determined by the insertion position of the Lotus pipe into the duct sleeve and the rotational position about the axis of the duct sleeve. Therefore, when the lotus tube is inserted into the duct sleeve in a state where the rotation position of the lotus tube is deviated from the predetermined rotation position in the circumferential direction of the duct sleeve, the position of each sheath tube duct sleeve is changed from the predetermined position to the duct sleeve. Shift in the circumferential direction. When the position of each sheath tube duct sleeve is shifted from the predetermined position, when each sheath tube is connected to each sheath tube duct sleeve, alignment between each sheath tube and each sheath tube duct sleeve becomes difficult. Connection work between the sheath tube and each sheath tube duct sleeve becomes complicated.

  In addition, when the Lotus pipe is inserted into the duct sleeve in a state where the insertion position of the Lotus pipe is deviated from the predetermined insertion position in the axial direction of the duct sleeve, the other end of each sheath pipe duct sleeve is the connection end of the Lotus pipe. When projecting from the other end, the other end of each sheath tube duct sleeve projects into the working hole.

  Further, when each sheath tube duct sleeve is fixed in the duct sleeve via a fixing member as in the invention described in Patent Document 2, the duct sleeve of the fixing member is inserted at a predetermined insertion position of the fixing member into the duct sleeve. Since there is no special restriction means for restricting movement along the axial direction and rotation around the axis of the duct sleeve, when the fixing member is inserted into the duct sleeve, the position of the fixing member within the duct sleeve is predetermined. There is a risk that the position will deviate. When the position of the fixing member is deviated from the predetermined position, the position of each sheath tube duct sleeve attached to the fixing member in the duct sleeve is deviated from the predetermined position. Therefore, also in this case, the displacement of each sheath tube duct sleeve complicates the connecting operation between each sheath tube and each sheath tube duct sleeve, and the other end of each sheath tube duct sleeve projects into the working hole. End up.

  Therefore, in order to prevent the displacement of the sheath tube duct sleeve, the base duct sleeve is fixed to the wall of the working hole, and the front duct sleeve is inserted into the base duct sleeve. There has been proposed a structure in which a fixing member inserted into a duct sleeve is sandwiched between a base duct sleeve and a front duct sleeve (see, for example, Patent Document 3).

  In this structure, when the final main pipe and the wall of the other working hole are connected to each other, each sheath is placed in advance in the base duct sleeve fixed to the wall of the other working hole. After the fixing member to which the pipe duct sleeve is attached is inserted, the front duct sleeve is inserted into the base duct sleeve while passing through each sheath pipe duct sleeve. Thereafter, as described above, the final main pipe and the front duct sleeve are connected by performing the above-described exchange connection using the adjusting pipe.

  According to this structure, as long as the fixing member is securely sandwiched between the base duct sleeve and the front duct sleeve, the axial movement of both the duct sleeves of the fixing member and the rotation around the axis are restricted. Therefore, the fixing member can be held at a predetermined insertion position into the proximal duct sleeve.

Therefore, the position of the sheath tube duct sleeve attached to the fixing member in the duct sleeve is prevented from being shifted from a predetermined position in the axial direction and the circumferential direction of the duct sleeve due to the displacement of the fixing member.
Japanese Patent Laying-Open No. 2005-261079 Japanese Patent Laid-Open No. 2004-282891 JP 2006-300188 A

  However, when the fixing member is sandwiched between the base duct sleeve and the front duct sleeve, each sheath tube duct sleeve is passed through the front duct sleeve when the front duct sleeve is inserted into the base duct sleeve. Sometimes, it is necessary for an operator to keep the sheath duct duct sleeves together without being dispersed so that the sheath duct sleeves can be easily inserted into the front duct sleeve. For this reason, the pinching operation of the fixing member becomes complicated, and the connecting operation of the main pipe to the duct sleeve becomes complicated.

  In particular, when other power pipes and communication pipes are already laid around the base duct sleeve, each sheath pipe duct sleeve is held in the space between the other power pipes and communication pipes. Since it is necessary to perform the work of inserting the front duct sleeve into the base duct sleeve, the work of connecting the main pipe to the duct sleeve becomes more complicated.

  In addition, since the movement and rotation of the fixing member are not restricted until the fixing member is sandwiched between the two duct sleeves, even if the fixing member is placed in a predetermined insertion position in the base duct sleeve, When passing each sheath tube duct sleeve through, for example, the leading duct sleeve hits each sheath tube duct sleeve or the operator holding each sheath tube duct sleeve causes camera shake, so that the fixing member from each sheath tube duct sleeve is fixed. When a force acts on the fixing member, the fixing member easily deviates from a predetermined insertion position into the proximal duct sleeve.

  In addition, when the front duct sleeve is inserted into the base duct sleeve, the fixing member is covered with the front duct sleeve, so that it is difficult for the operator to visually recognize the arrangement of the fixing member. Is difficult for the operator to notice that the position has shifted from the predetermined insertion position.

  For this reason, there is a possibility that the fixing member may be sandwiched between the two duct sleeves in a state where the fixing member is shifted from a predetermined position in the base duct sleeve.

  Accordingly, an object of the present invention is to provide a pipe connection structure and a fixing that can easily connect the main pipe to the duct sleeve and can reliably prevent displacement of the sheath pipe duct sleeve within the duct sleeve. It is to provide a member.

  In order to solve the above problems, the invention according to claim 1 is a wall body that defines a sheath tube into which a cable is inserted, a main tube that accommodates the sheath tube, and a working hole for relaying the cable. A cylindrical duct sleeve provided on the wall body to which an end of the main pipe is connected, and accommodated in the duct sleeve to allow thermal expansion and contraction and movement along the axis of the sheath pipe A sheath tube duct sleeve into which an end of the sheath tube is inserted so as to be relatively displaceable; and a fixing member that is inserted into the duct sleeve and fixes the sheath tube duct sleeve to the duct sleeve. Between the member and the duct sleeve, at a predetermined insertion position of the fixing member into the duct sleeve, the movement of the fixing member along the axial direction of the duct sleeve and the rotation around the axis of the duct sleeve Fixing member Characterized in that the regulating means for regulating the rolling is provided.

  According to a second aspect of the present invention, in the first aspect of the present invention, the fixing member has a facing surface facing the inner peripheral surface of the duct sleeve, and the restricting means is provided on the facing surface. And an arrangement posture of the compression member that is compressible and deformable toward the opposing surface, and the sheath tube duct sleeve that is formed at a portion of the inner peripheral surface of the duct sleeve at the predetermined insertion position and is fixed to the fixing member. The compression member is provided with a recess that enters when the compression member is released from the compression when the fixing member is placed in a rotation position when a predetermined arrangement posture is attained.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the duct sleeve is formed on the wall body at an end portion of the both ends of the duct sleeve located on the inner side of the working hole. The fixing member is formed so as to allow insertion of the fixing member from the inside of the working hole and to store the fixing member.

  The invention according to claim 4 is the invention according to claim 3, wherein the duct sleeve has an insertion end portion into which an end portion of the main pipe is inserted, and the duct sleeve includes the duct sleeve. A protruding portion that protrudes inward and is capable of contacting the end surface of the main pipe is formed between the insertion end portion and the accommodating portion.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the main pipe and the duct sleeve are disposed in the main pipe and the duct sleeve to which the main pipe is connected. At least two in the main pipe and in the duct sleeve so as to form at least two pipe lines in the main pipe and in the duct sleeve, respectively. A separator for partitioning is provided.

  According to a sixth aspect of the present invention, there is provided a cylindrical duct sleeve provided in a wall body defining a working hole for relaying a cable inserted in a sheath pipe accommodated in a main pipe and connected to the main pipe. A fixing member for fixing to the duct sleeve a sheath pipe duct sleeve which is inserted into the duct sleeve and inserted into the duct sleeve so that the end of the sheath pipe is relatively displaceable along an axis thereof. A restriction means is provided for restricting movement along the axial direction of the duct sleeve and rotation around the axis of the duct sleeve at a predetermined insertion position into the duct sleeve.

  According to the first aspect of the present invention, the fixing member is fixed between the fixing member for fixing the sheath tube duct sleeve to the duct sleeve and the duct sleeve at a predetermined insertion position of the fixing member into the duct sleeve. Since the restricting means for restricting the movement along the axial direction of the duct sleeve and the rotation around the axis of the duct sleeve is provided, when the fixing member is inserted into the duct sleeve, the fixing member is In the state where the movement along the axial direction and the rotation around the axis of the duct sleeve are restrained, the positioning is performed at the predetermined insertion position.

  Thereby, the position of the fixing member in the duct sleeve is prevented from deviating from the predetermined insertion position in the axial direction and the circumferential direction of the duct sleeve.

  In addition, since the fixing member and the sheath tube duct sleeve can be inserted into the duct sleeve from inside the work hole, other power pipes and communication pipes, for example, are already laid around the duct sleeve outside the work hole. Even if it is, other power pipes, communication pipes and the like do not hinder the operation of inserting the fixing member and the sheath pipe duct sleeve into the duct sleeve. Thereby, for example, other power pipes and communication pipes are already laid around the duct sleeve, so that there is no inconvenience in connecting the main pipe to the duct sleeve as in the prior art.

  Further, since the fixing member is placed at the predetermined insertion position in the duct sleeve, movement along the axial direction of the duct sleeve and rotation around the axis of the duct sleeve can be restricted. When it is simply inserted into the base duct sleeve without being restricted in movement and rotation from the predetermined insertion position in the base duct sleeve until it is clamped between the two duct sleeves In contrast, after the fixing member is placed at the predetermined insertion position, for example, it is possible to reliably prevent the displacement of the fixing member due to the force received from the sheath tube duct sleeve.

  In addition, in a state where the fixing member is positioned at the predetermined insertion position in the duct sleeve, the fixing member is not covered with a member different from the duct sleeve, so that an operator can easily arrange the fixing member. It can be visually recognized. As a result, even if the fixing member is deviated from the predetermined insertion position, the fixing member is deviated from the predetermined insertion position as compared with the conventional case where the fixing member is sandwiched between both duct sleeves. It is easy for workers to notice. Further, since the restricting means does not restrict the movement and rotation of the fixing member at a position other than the predetermined insertion position, the operator confirms whether the movement and rotation of the fixing member is constrained. It can be easily determined whether or not is placed at the predetermined insertion position. Accordingly, it is possible to reliably prevent the fixing member from being positioned at a position shifted from the predetermined insertion position due to an erroneous determination by the operator.

  Further, according to the first aspect of the present invention, as described above, the position of the fixing member in the duct sleeve is prevented from being shifted from the predetermined insertion position in the axial direction and the circumferential direction of the duct sleeve by the regulating means. Therefore, the position of the sheath tube duct sleeve attached to the fixing member in the duct sleeve is reliably prevented from being displaced from the predetermined insertion position in the axial direction and the circumferential direction of the duct sleeve due to the positional deviation of the fixing member. can do.

  As a result, the conventional operation of connecting the sheath tube to each sheath tube duct sleeve due to the position of the sheath tube duct sleeve being displaced from the predetermined insertion position is caused, and the cable is drawn into the sheath tube. In this case, it is possible to reliably prevent the cable from being erroneously inserted into a sheath tube other than the predetermined sheath tube, and to reliably prevent the end of the sheath tube duct sleeve from protruding into the working hole. Can do.

  Further, according to the invention described in claim 1, the sheath tube accommodated in the main tube is inserted into the sheath tube duct sleeve so as to be relatively displaceable so that thermal expansion and contraction and movement along the axis are allowed. Therefore, when the sheath tube is displaced relative to the sheath tube duct sleeve during the thermal expansion and contraction of the sheath tube and the occurrence of an earthquake, the sheath tube is prevented from coming out of the sheath tube duct sleeve as in the conventional case. Can do.

  Further, according to the first aspect of the present invention, since the fixing member for fixing the sheath tube duct sleeve is provided in the duct sleeve, the conventional lotus tube can be dispensed with. Thereby, since the number of parts required for the connection of the main pipe and the sheath pipe to the wall of the working hole can be reduced, the piping cost can be reduced as in the conventional case.

  According to the second aspect of the present invention, the compression member provided on the opposing surface of the fixing member is configured such that the rotation position of the fixing member is a sheath in a state where the fixing member is inserted into the duct sleeve at the predetermined insertion position. When the tube duct sleeve is placed at a position where the tube sleeve is in a predetermined position, the compression is released, and the tube sleeve enters a recess formed in a portion of the duct sleeve at the predetermined insertion position. Accordingly, the fixing member is inserted into the duct sleeve in a state where the compression member is compressed and deformed, and the compression member is fitted into the recess, whereby the fixing member can be easily positioned in the duct sleeve at the predetermined insertion position. it can.

  According to the third aspect of the present invention, the end of the duct sleeve located on the inner side of the work hole is positioned on the inner side of the work hole and the fixing member from the work hole is provided in the state where the duct sleeve is provided on the wall body. A receiving portion that allows insertion and accommodates the fixing member is formed.

  Conventionally, when the pipe line is formed between two work holes, the end-point side Lotus pipe to which a plurality of sheath pipe duct sleeves are fixed is connected in advance to the duct sleeve provided in the wall of the other work hole on the end-point side. Or a plurality of sheath tube duct sleeves must be inserted into the duct sleeve provided on the wall of the other working hole in advance from the outside of the other working hole and fixed via a fixing member. From the above, in order to connect the sheath pipe in the final main pipe and each sheath pipe duct sleeve, the exchange connection work using the adjusting pipe is performed between the final main pipe and the end-point side Lotus pipe or the duct sleeve. There is a need to do.

  For this reason, in order to perform exchange connection work when connecting each sheath pipe duct sleeve and the sheath pipe in the final main pipe, at least the end of the final main pipe and the wall of the other working hole It is necessary to secure a working space in between.

  Therefore, for example, when the other work hole is provided in the vicinity of the road and the pipe line is formed so as to cross the road toward the other work hole, the work is formed around the other work hole. When excavating the ground to form a working space, the excavation area protrudes greatly into the road, which causes significant traffic restrictions on the road during connection work.

  On the other hand, according to the present invention, as described above, the accommodating portion that accommodates the fixing member is formed at the end portion located on the inner side of the working hole of the duct sleeve, and the accommodating portion is the duct. Since the fixing member can be inserted from the working hole while the sleeve is provided on the wall of the working hole, the fixing member is inserted from the working hole into the accommodating portion of the duct sleeve. By inserting the sleeve into the sleeve from the working hole and attaching it to the fixing member, the sleeve can be fixed to the duct sleeve via the fixing member.

  Thereby, when forming the pipe line for the cable between the two working holes using the main pipe and the sheath pipe, the wall of the one working hole on the start point side to the wall of the other working hole on the end point side. When the main pipe and the sheath pipe are sequentially connected to the body, for example, the adjustment pipe provided with the same slide pipe as the conventional pipe is connected to the final main pipe, and the sheath accommodated in the final main pipe is connected. After connecting the sheath tube in the adjusting tube to the tube, and further connecting the same terminal sheath tube to the conventional sheath tube, the sheath tube duct sleeve is placed in the duct sleeve provided in the wall of the other working hole. Is inserted together with the fixing member to insert the terminal sheath tube into the sheath tube duct sleeve, whereby the final main tube sheath tube and the sheath tube duct sleeve are connected to the adjustment tube sheath tube and the terminal sheath tube. Can be connected to each other.

  Therefore, unlike the case where the sheath tube duct sleeve needs to be fixed to the duct sleeve in advance, the last tube is connected to each sheath tube duct sleeve in the final main tube. There is no need to perform a conventional exchange connection between the main pipe and the duct sleeve.

  Therefore, in order to connect the sheath tube duct sleeve and the sheath tube in the final main tube, the slide tube is adjusted by sliding the slide tube after the connection between the sheath tube duct sleeve and the terminal sheath tube. Space for performing the work straddling between the pipe and the duct sleeve, that is, the slide pipe provided in the adjustment pipe is in a state before the slide pipe is slid toward the duct sleeve, opposite to the duct sleeve side at both ends of the slide pipe It is sufficient to secure a space between the end located on the side and the wall of the other working hole in the ground.

  Thus, compared to the case where it is necessary to secure a space between the end of the final main pipe and the wall of the other work hole as in the case of conventional exchange connection work, The size of the work space to be secured from the wall of the other work hole can be reliably reduced.

  Therefore, for example, even when the other work hole is provided in the vicinity of the road and the pipe is formed so as to cross the road toward the other work hole, the other work hole is formed around the other work hole. When excavating the ground to form a working space, the excavation area is prevented from protruding into the road as much as when performing conventional exchange connection work. It is possible to reliably prevent traffic restrictions.

  According to the invention described in claim 4, the duct sleeve has an insertion end portion into which an end portion of the main pipe is inserted at an end portion located on the opposite side to the end portion where the accommodating portion is formed, and the duct sleeve. Is formed between the insertion end portion and the accommodating portion so as to protrude inward of the duct sleeve and contact the end face of the end portion of the main pipe.

  From this, for example, by forming the projecting portion at a position that contacts the fixing member placed at the predetermined insertion position in the housing portion of the duct sleeve, the force that pushes the fixing member from the housing portion toward the insertion end portion is increased. When acting, the force acts on the protruding portion from the fixing member as a compressive force for compressing the protruding portion in the axial direction of the duct sleeve, so that the force can be received by the protruding portion. Thereby, it can restrict | limit more reliably that a fixing member moves toward the insertion end part of a duct sleeve from the said predetermined insertion position in an accommodating part.

  In addition, when the end of the main pipe is inserted into the insertion end of the duct sleeve, a force directed toward the work hole acts on the main pipe, so that the main pipe faces the work hole in the duct sleeve, that is, a fixing member. When moving toward the end, the end surface of the main pipe comes into contact with the protruding portion before coming into contact with the fixing member. As a result, the movement of the main pipe toward the fixing member is restricted, so that the force acting on the main pipe is prevented from acting on the fixing member from the main pipe. Accordingly, it is possible to reliably prevent the engagement of the fixing member with the duct sleeve due to the force acting on the main pipe being transmitted to the fixing member.

  According to the fifth aspect of the present invention, the main pipe and the duct sleeve to which the main pipe is connected extend along the axial line so as to straddle the main pipe and the duct sleeve, and the main pipe and the duct sleeve. In order to form at least two pipe lines, a separator is provided for dividing the inside of the main pipe and the inside of the duct sleeve into at least two when viewed in cross section.

  From this, for example, a communication cable composed of a plurality of trunk cables connecting telephone offices, such as a telephone line, and a plurality of lead cables branched from the trunk cable and drawn into a building such as a house or a store Is buried under the road surface of a narrow narrow road, each main pipe and duct sleeve are divided into two parts up and down by a separator when viewed in a cross section, for example, and each main line cable is individually divided into a sheath pipe and a sheath. The main cable and the lead-in cable are accommodated in the main space and the lower space in the duct sleeve in the state accommodated in the pipe duct sleeve, and the lead-in cable is accommodated in the upper space in each main pipe and the duct sleeve. The cable can be accommodated in a single line formed by the main pipe and the duct sleeve.

  This reduces the proportion of each cable occupying the space below the road surface when each cable is embedded under the road surface, compared to the case where the trunk cable and the lead-in cable are accommodated in different pipes. Can be made.

  Therefore, since the entire pipeline can be made more compact than conventional ones, for example, the cables for the main lines and under the road surface of a narrow road having a smaller width than a road provided in a residential area or a shopping street, for example. Each lead-in cable can be embedded easily.

  According to the sixth aspect of the present invention, the fixing member for fixing the sheath duct duct sleeve to the duct sleeve is arranged in the axial direction of the duct sleeve of the fixing member at a predetermined insertion position of the fixing member into the duct sleeve. Since the restricting means for restricting the movement along the axis of the duct sleeve and the rotation around the axis of the duct sleeve is provided, when the fixing member is inserted into the duct sleeve, the fixing member is moved along the axial direction of the duct sleeve by the restricting means. In a state where movement and rotation around the axis of the duct sleeve are constrained, positioning is performed at the predetermined insertion position.

  Thereby, the position of the fixing member in the duct sleeve is prevented from deviating from the predetermined insertion position in the axial direction and the circumferential direction of the duct sleeve.

  Therefore, in order to hold the fixing member at the predetermined insertion position, it is not necessary to sandwich the fixing member between the two duct sleeves as in the prior art. Since it is not necessary to perform an insertion operation, it is not necessary for an operator to keep a plurality of sheath tube duct sleeves in a combined state. Thereby, the complexity of the conventional connection work by an operator holding each sheath pipe duct sleeve is not caused.

  In addition, since the fixing member and the sheath tube duct sleeve can be inserted into the duct sleeve from inside the work hole, other power pipes and communication pipes, for example, are already laid around the duct sleeve outside the work hole. Even if it is, other power pipes, communication pipes and the like do not hinder the operation of inserting the fixing member and the sheath pipe duct sleeve into the duct sleeve. Thereby, for example, other power pipes and communication pipes are already laid around the duct sleeve, so that there is no inconvenience in connecting the main pipe to the duct sleeve as in the prior art.

  Further, since the fixing member is placed at the predetermined insertion position in the duct sleeve, movement along the axial direction of the duct sleeve and rotation around the axis of the duct sleeve can be restricted. When it is simply inserted into the base duct sleeve without being restricted in movement and rotation from the predetermined insertion position in the base duct sleeve until it is clamped between the two duct sleeves In contrast, after the fixing member is placed at the predetermined insertion position, for example, it is possible to reliably prevent the displacement of the fixing member due to the force received from the sheath tube duct sleeve.

  In addition, in a state where the fixing member is positioned at the predetermined insertion position in the duct sleeve, the fixing member is not covered with a member different from the duct sleeve, so that an operator can easily arrange the fixing member. It can be visually recognized. As a result, even if the fixing member is deviated from the predetermined insertion position, the fixing member is deviated from the predetermined insertion position as compared with the conventional case where the fixing member is sandwiched between both duct sleeves. It is easy for workers to notice. Further, since the restricting means does not restrict the movement and rotation of the fixing member at a position other than the predetermined insertion position, the operator confirms whether the movement and rotation of the fixing member is constrained. It can be easily determined whether or not is placed at the predetermined insertion position. Accordingly, it is possible to reliably prevent the fixing member from being positioned at a position shifted from the predetermined insertion position due to an erroneous determination by the operator.

  Further, according to the invention described in claim 6, as described above, the position of the fixing member in the duct sleeve is prevented from being shifted from the predetermined insertion position in the axial direction and the circumferential direction of the duct sleeve by the regulating means. Therefore, the position of the sheath tube duct sleeve attached to the fixing member within the duct sleeve is reliably prevented from being shifted from the predetermined insertion position in the axial direction and the circumferential direction of the duct sleeve due to the positional deviation of the fixing member. be able to.

  As a result, the conventional operation of connecting the sheath tube to each sheath tube duct sleeve due to the position of the sheath tube duct sleeve being displaced from the predetermined insertion position is caused, and the cable is drawn into the sheath tube. In this case, it is possible to reliably prevent the cable from being erroneously inserted into a sheath tube other than the predetermined sheath tube, and to reliably prevent the end of the sheath tube duct sleeve from protruding into the working hole. Can do.

  Furthermore, according to the invention described in claim 6, since the fixing member for fixing the sheath tube duct sleeve is provided in the duct sleeve, the conventional lotus tube can be dispensed with. Thereby, since the number of parts required for the connection of the main pipe and the sheath pipe to the wall of the working hole can be reduced, the piping cost can be reduced.

  The present invention will be described with reference to the illustrated embodiments.

  As shown in FIG. 1, the pipe connection structure 10 according to the present invention includes a main pipe 11, a plurality of sheath pipes 12 accommodated in the main pipe, and work holes in which the main pipe 11 and the respective sheath pipes 12 are connected. And a cylindrical duct sleeve 14 provided on a wall body 13 a defining 13.

  As shown in FIG. 2, the main pipe 11 and the sheath pipes 12 are each made of a pipe member having a circular cross section, and are formed of a synthetic resin material having heat stretchability such as polyvinyl chloride. In the illustrated example, the main pipe 11 and each sheath pipe 12 are accommodated when the optical communication cable 15 is buried under the road surface of the road, respectively, and are used to protect the optical communication cable 15 from, for example, groundwater.

  The optical communication cable 15 is composed of, for example, a plurality of trunk cables 16 connecting between telephone offices and a plurality of lead-in cables 17 branched from the trunk cables and drawn into a building such as a house or a store (not shown). Has been. Each trunk cable 16 and each lead-in cable 17 extend from the work hole 13 into the ground.

  In the example shown in the figure, the main pipe 11 is separated from the main pipe 11 in order to accommodate the main cable 16 and the lead-in cable 17 separately. A separator 18 is provided that is divided into two spaces in the vertical direction as seen in the cross section. Each drawing cable 17 is accommodated in the upper space 19 in the main pipe 11. Each sheath tube 12 is accommodated in a lower space 20 of the main tube 11, and one main cable 16 is inserted into each sheath tube.

  In the illustrated example, the separator 18 includes a plate-like portion 21 that is inserted into the main tube 11 so as to cross a transverse section in the main tube 11 to the left and right, and a width direction of the plate-like portion (left and right as viewed in FIG. 2). And a pair of extending portions 22 extending from the side edge portions 21a facing each other toward the lower side of the plate-like portion 21 and having a long shape extending along the axial direction of the main pipe 11 as a whole. There is no.

  The plate-like portion 21 has a flat portion 23 formed at the center in the width direction and a pair of inclined portions 24 extending obliquely upward from both edges of the flat portion, and the upper space 19 as a whole. It has a V-shaped cross section that opens to the top.

  On the outer surface 22 a of each extension portion 22, a recess 26 is formed to be engaged with a protrusion 25 formed on the inner peripheral surface 11 a of the main tube 11 so as to extend in the axial direction of the main tube 11. The engagement of each recess 26 with each protrusion 25 prevents rotation of the separator 18 around the axis of the main pipe 11.

  As shown in FIG. 1, the separator 18 protrudes outward in the axial direction from the end 11b of the main pipe 11 in a state where the end 11b of the main pipe 11 is inserted into the duct sleeve 14 as described later. The duct sleeve 14 extends along the axial direction thereof. Thus, the separator 18 is disposed so as to straddle the main pipe 11 and the duct sleeve 14 to which the main pipe is connected and extend along the axis thereof, and the inside of the duct sleeve 14 is the same as that of the main pipe 11. In addition, the separator 18 is divided into two spaces in the vertical direction as viewed in the cross section of the duct sleeve 14.

  Further, as shown in FIG. 3, a portion of each extending portion 22 at the end 18a of the separator 18 opens to the lower end 22b of each extending portion 22 and extends in the extending direction of each extending portion 22, and is a fixing member described later. A pair of notches 28 are formed to engage with 27.

  The work hole 13 is composed of well-known manholes, handholes, and the like. The work cable 13 and the pull-in cable 17 inserted into the main pipe 11 and each sheath pipe 12 are checked, branched, and each cable. The chambers are provided at predetermined intervals in the ground for connecting the cables 16 and 17 to other cables.

  As shown in FIG. 1, the duct sleeve 14 provided in the wall 13a of the working hole 13 is made of a tube member made of a synthetic resin material similar to the main tube 11 and each sheath tube 12, for example. Then, it extends linearly from the wall 13a of the working hole 13 to the side thereof.

  The length of the duct sleeve 14 along its axis allows expansion and contraction along the axis of the main pipe 11 when the main pipe 11 is heated or cooled, and is due to vibration applied to the main pipe 11 when an earthquake occurs. The length is set to allow movement along the axis of the main pipe.

  The duct sleeve 14 has an insertion end portion 14a into which the end portion 11b of the main pipe 11 is slidably inserted along the axis of the duct sleeve 14 at the distal end portion, and is fixed to the wall body 13a at the base end portion. The fixed end portion 14b is provided.

  An annular seal member 29 is provided on the inner peripheral surface 14c of the insertion end portion 14a to hermetically seal between the end portion 11b of the main pipe 11 inserted into the insertion end portion 14a.

  The fixed end portion 14 b is formed with a diameter-expanded portion 30 that gradually increases the inner diameter of the duct sleeve 14 toward the inner side of the work hole 13.

  The duct sleeve 14 is formed with a protruding portion 31 that protrudes into the duct sleeve. In the illustrated example, the protruding portion 31 protrudes from the inner peripheral surface 14 c of the duct sleeve 14 into the duct sleeve 14 and extends in the circumferential direction of the duct sleeve 14. The projecting amount of the projecting portion 31 is set to a size that allows contact with the end surface 11 c of the end portion 11 b of the main pipe 11 inserted into the insertion end portion 14 a of the duct sleeve 14.

  Of the both end portions 14a and 14b of the duct sleeve 14, the end portion located on the inner side of the working hole 13, that is, the fixed end portion 14b, is formed from the inside of the working hole 13 with the duct sleeve 14 provided on the wall body 13a. A receiving portion 14d that allows insertion of the fixing member 27 and receives the fixing member is formed.

  In the illustrated example, the protruding portion 31 is formed in the duct sleeve 14 at a substantially central portion in the axial direction thereof, so that the fixed end portion 14b extends along the axial direction of the duct sleeve 14 between the protruding portion 31 and the enlarged diameter portion. A cylindrical portion having a predetermined width dimension is formed, and the accommodating portion 14d is defined by the cylindrical portion.

  A plurality of sheath tube duct sleeves 32 connected to the respective sheath tubes 12 are accommodated in the duct sleeve 14.

  Each sheath tube duct sleeve 32 has an insertion end portion 32a into which the end portion 12a of each sheath tube 12 is slidably inserted along the axis of each sheath tube duct sleeve 32 at one end portion. Each sheath tube duct sleeve 32 has a fixed end portion 32b fixed to the duct sleeve 14 at the other end portion thereof. The length of each sheath tube duct sleeve 32 along its axis allows the sheath tube 12 to expand and contract along the axis of each sheath tube 12 when heated or cooled, and each sheath tube when an earthquake occurs. 12 is set to a length that allows movement of each of the sheath tubes along the axis due to the vibration given to 12. In the illustrated example, each of the sheath tube duct sleeves 32 has an insertion end portion 32a projecting outward in the axial direction from the insertion end portion 14a of the duct sleeve 14, and a fixed end portion 32b of each sheath tube duct sleeve 32 is a duct. It arrange | positions in the duct sleeve 14 so that it may be located in this duct sleeve, without protruding from the sleeve 14.

  The duct sleeve 14 is provided with the above-described fixing member 27 for fixing each sheath tube duct sleeve 32 to the duct sleeve 14.

  As shown in FIG. 4, the fixing member 27 includes an annular member 34 and a plate-like member 35 attached to the annular member.

  As shown in FIGS. 5A and 5B, the annular member 34 is formed of a short cylinder member. The inner diameter of the annular member 34 is large enough to allow insertion of each sheath tube duct sleeve 32 and separator 18. As shown in FIG. 1, the annular member 34 is inserted into the accommodating portion 14 d of the duct sleeve so that its axis is located on the axis of the duct sleeve 14.

  On one end face 34a of the lower half 36 of the annular member 34 in the vertical direction (the vertical direction as viewed in FIG. 5), as shown in FIGS. 5 (a) and 5 (b), the lower half The step portion 38 is formed so that the width dimension 36 (the dimension along the axial direction of the annular member 34) is smaller than that of the upper half portion 37.

  A pair of protrusions 39 are formed on the inner peripheral surface 34 b of the annular member 34. Each protrusion 39 is positioned on the extension of each protrusion 25 of the main pipe 11 in a state in which the main pipe 11 is inserted into the duct sleeve 14, and is in the recess 26 formed in each extension 22 of the separator 18. Engageable.

  When the annular member 34 is inserted into the duct sleeve 14, the outer peripheral surface 34 c of the annular member 34 faces the inner peripheral surface 14 c of the duct sleeve 14. That is, the outer peripheral surface 34 c of the annular member 34 constitutes a facing surface that faces the inner peripheral surface 14 c of the duct sleeve 14.

  As shown in FIG. 6, the plate-like member 35 includes a fitting portion 40 that fits in the lower half portion 36 of the annular member 34, and is formed in the fitting portion, and is connected to the lower half portion 36 of the annular member 34. And an engaging portion 41 that engages with the stepped portion 38 of the annular member 34 in a fitted state of the fitting portion 40.

  In the illustrated example, the fitting portion 40 is formed of a semicircular plate member having a diameter substantially equal to the inner diameter of the annular member 34, and the thickness direction of the annular member 34 is shown in FIG. 5A. Are fitted into the annular member 34 along the axial direction. As shown in FIG. 4 and FIG. 6A, the fitting portion 40 is formed with a plurality of insertion holes 42 into which the respective sheath tube duct sleeves 32 are inserted so as to penetrate the fitting portion 40 in the plate thickness direction. Has been. Each sheath tube duct sleeve 32 is fixed to the fitting portion 40 by being bonded to the fitting portion 40 with, for example, an adhesive in a state where the respective fixed end portions 32b are inserted into the respective insertion holes 42.

  As shown in FIGS. 4 and 6, a recess 43 that receives the separator 18 inserted into the annular member 34 is formed on the upper end surface 40 a of the fitting portion 40. The recess 43 has a flat surface 43a for receiving the flat surface portion 23 of the plate-like portion 21 of the separator 18 on its bottom surface, and has inclined surfaces 43b for partially receiving the respective inclined portions 24 of the plate-like portion 21 on its respective side surfaces. . As shown in FIGS. 3 and 4, the planar portion 23 and each inclined portion 24 of the separator 18 are inserted into the respective notches 28 of the separator 18 at the respective end portions 40 b in the left-right direction of the fitting portion 40. As a result, the flat portion 23 of the separator 18 and the portion of each inclined portion 24 abut. Thereby, the separator 18 is supported by the fitting part 40 in the state inserted in the annular member 34.

  At both ends 40d of the arcuate surface 40c of the fitting portion 40, as shown in FIG. 6, engaging surfaces 44 that engage with the protrusions 39 from below in the fitted state of the fitting portion 40 into the annular member 34. Is formed. Each engaging surface 44 is engaged with each protrusion 39 as shown in FIG. 4, so that when the rotational force around the axis of the annular member 34 acts on the fitting portion 40, the rotational force is applied to each protrusion 39. Since each projection 39 acts from each engagement surface 44 as a compressive force for compressing each annular member 34 in the circumferential direction of the annular member 34, the rotational force is received by each projection 39. Thereby, rotation of the fitting part 40 around the axis line of the annular member 34 is prevented.

  As shown in FIG. 6, the engaging portion 41 protrudes outward in the radial direction of the fitting portion 40 from the arc surface 40 c of the fitting portion 40 and extends along the arc surface 40 c, as shown in FIG. Further, the stepped portion 38 is engaged from the one end face 34 a side of the annular member 34. The amount of protrusion of the engaging portion 41 from the circular arc surface 40 c is substantially equal to the plate thickness dimension of the annular member 34. This prevents the engaging portion 41 from protruding outward in the radial direction of the annular member 34 in a state where the engaging portion 41 is engaged with the step portion 38.

  The plate-like member 35 has its engaging portion 41 joined to the stepped portion 38 or the arcuate surface 40c of the fitting portion 40 joined to the inner peripheral surface 34b of the annular member 34 with a joining material such as an adhesive. The fitting portion 40 is fixed in the annular member 34 in a state where the fitting portion 40 is fitted in the lower half portion 36 of the annular member 34 and the engaging portion 41 is engaged with the step portion 38.

  As shown in FIG. 1, the fixing member 27 includes a housing portion for the duct sleeve 14 such that the other end surface 34 d of the annular member 34 opposite to the one end surface 34 a faces the protruding portion 31. 14d.

  In the pipe connection structure 10 according to the present invention, the axial direction of the duct sleeve 14 of the fixing member 27 is arranged between the fixing member 27 and the duct sleeve 14 at a predetermined insertion position of the fixing member 27 into the duct sleeve 14. A restricting means 45 for restricting the movement and rotation around the axis of the duct sleeve 14 is provided.

  In the example shown in FIG. 1, the restricting means 45 is formed on the pair of first recesses 46 formed on the outer peripheral surface 34 c of the annular member 34 of the fixing member 27 and the inner peripheral surface 14 c of the accommodating portion 14 d of the duct sleeve 14. A pair of formed second recesses 47 and a compression member capable of compressive elastic deformation are provided.

  As shown in FIG. 5B, each first recess 46 is formed on the outer peripheral surface 34 c of the annular member 34 at a position that is symmetrical with respect to the center of the annular member 34.

  As shown in FIGS. 1 and 7, each second recess 47 has the fixing member 27 at the predetermined insertion position and the rotation position of the fixing member 27 around the axis of the duct sleeve 14 at a predetermined rotation. It forms in the inner peripheral surface 14c of the accommodating part 14d of the duct sleeve 14 so that it may oppose each 1st recessed part 46, when it puts in a position.

  As described above, the predetermined insertion position is an insertion position where the other end surface 34 d of the annular member 34 of the fixing member 27 is opposed to the protruding portion 31. Further, in the illustrated example, the predetermined rotational position is fixed to the rotational position, ie, the plate member 35, facing the lower space 20 of the main pipe 11 in which the plate member 35 of the fixing member 27 is inserted into the duct sleeve 14. This is a rotational position when each of the sheath tube duct sleeves 32 is in a predetermined arrangement posture facing each sheath tube 12 accommodated in the lower space 20 of the main tube 11.

  In the illustrated example, the compression member is composed of a pair of compression spring members 48. As shown in FIG. 8, each compression spring member 48 includes a pair of parallel plate portions 49 having a rectangular shape arranged substantially parallel to each other, and one edge portion 49 a of one parallel plate portion 49. A plate-like connecting portion 50 that extends toward an edge portion 49b located on the opposite side of the edge portion 49a of the other parallel plate portion 49 that faces each other, and connects the parallel plate portions 49 to each other, and is substantially Z-shaped. Having a cross-sectional shape.

  Each compression spring member 48 is formed by bending a plate member, and is compressed and deformed by being bent in a direction in which the angle formed between each parallel plate portion 49 and the connecting portion 50 is reduced.

  As shown in FIG. 7, each compression spring member 48 is accommodated in each first recess 46 so that the space between each parallel plate portion 49 and the connecting portion 50 is opened in the axial direction of the annular member 34. In the unloaded state, one parallel plate portion 49 and a part of the connecting portion 50 partially protrude outward from the respective first recesses 46. The amount of protrusion of each compression spring member 48 and the size of the maximum inner diameter of the enlarged diameter portion 30 of the duct sleeve 14 are such that each compression spring member 48 expands together with the fixing member 27 when the fixing member 27 is inserted into the duct sleeve 14. The size is set to be received in the section 30.

  Each compression spring member 48 is compressed and elastically deformed when the fixing member 27 is inserted into the duct sleeve 14, and the compression is released when each first recess 46 and each second recess 47 are aligned with each other. As a result, the one parallel plate portion 49 and a part of the connecting portion 50 respectively enter the second recesses 47. As a result, each compression spring member 48 engages with each of the first and second recesses across the first and second recesses 46 and 47, respectively.

  When connecting the main pipe 11 and each sheath pipe 12 to the wall body 13 a of the work hole 13, first, the fixing member 27 is placed in the work hole 13 so that the other end face 34 d of the annular member 34 faces the protruding portion 31. It is inserted from the inside into the accommodating portion 14d of the duct sleeve 14 through the fixed end portion 14b. At this time, as described above, the enlarged diameter portion 30 is formed in the fixed end portion 14b, and the amount of protrusion of each compression spring member 48 and the maximum inner diameter of the enlarged diameter portion 30 of the duct sleeve 14 are respectively determined as ducts. Since each compression spring member 48 is set so as to be received in the enlarged diameter portion 30 together with the fixing member 27 when the fixing member 27 is inserted into the sleeve 14, the fixing member 27 is expanded in diameter of the duct sleeve 14. When inserted into the portion 30, as shown in FIG. 7A, the one parallel plate portion 49 protruding from each first recess 46 and a part of the connecting portion 50 are respectively end surfaces of the enlarged diameter portion 30. That is, interference with the end face of the fixed end portion 14b of the duct sleeve 14 is prevented.

  Further, as described above, each compression spring member 48 is accommodated in each first recess 46 so that the space between each parallel plate portion 49 and the connecting portion 50 is opened in the axial direction of the annular member 34. Therefore, when the fixing member 27 is inserted into the enlarged diameter portion 30, the one side is extended from the inner peripheral surface 30 a of the enlarged diameter portion 30 to the edge portion 49 a of the one parallel plate portion 49 of each compression spring member 48. Reaction force in the direction of reducing the angle formed by the parallel plate portion 49 and the connecting portion 50 acts. As a result, the one parallel plate portion 49 of each compression spring member 48 can be made to follow the tangential direction of the inner peripheral surface 30a of the enlarged diameter portion 30. Most of the force acting on the inner peripheral surface 30a can be released in the tangential direction of the inner peripheral surface. Therefore, the component in the direction opposite to the insertion direction out of the force acting on the one parallel plate portion 49 from the inner peripheral surface 30a of the enlarged diameter portion 30 can be reduced, so that the fixing member 27 in the enlarged diameter portion 30 can be reduced. Can be easily inserted.

  Furthermore, since the inner diameter of the duct sleeve 14 gradually increases toward the working hole 13, when the fixing member 27 is inserted into the enlarged diameter portion 30, the amount of insertion of the fixing member 27 into the enlarged diameter portion 30 is large. Accordingly, the magnitude of the reaction force acting on each compression spring member 48 from the inner peripheral surface 30a of the enlarged diameter portion 30 gradually increases. Thereby, each compression spring member 48 can be compressed and deformed by inserting the fixing member 27 into the enlarged diameter portion 30 so that the deformation amount of each compression spring member 48 gradually increases. Accordingly, when the fixing member 27 is inserted into the duct sleeve 14, for example, compared to a case where the operator holds the compression spring member 48 in a state of being compressed and deformed by hand, the fixing member 27 is inserted into the duct sleeve 14. The insertion operation can be easily performed.

  When the fixing member 27 passes through the enlarged-diameter portion 30, as shown in FIG. 7B, each compression spring member 48 is accommodated in each first recess 46 without protruding outward. I'm in a state. At this time, as described above, the engaging portion 41 of the plate-like member 35 of the fixing member 27 is prevented from protruding outward in the radial direction of the annular member 34 from the step portion 38 of the annular member 34. The engaging portion 41 of the plate-like member 35 does not hinder the insertion of the fixing member 27 into the duct sleeve 14.

  After the fixing member 27 is inserted into the accommodating portion 14d to the predetermined insertion position, the rotational position of the fixing member 27 is adjusted to the predetermined rotational position as shown in FIG. 7C. The compression of each compression spring member 48 is released. Accordingly, the one flat plate portion 49 of each compression spring member 48 is inserted into each second recess 46. As described above, each compression spring member 48 is accommodated in each first recess 46 so that the space between each parallel plate portion 49 and the connecting portion 50 is opened in the axial direction of the annular member 34. Therefore, when the moving force along the axial direction of the duct sleeve 14 and the rotational force along the circumferential direction of the duct sleeve 14 are applied to the fixing member 27, the moving force and the rotational force are respectively applied to the parallel plate portions 49 or 49. Since they act on the connecting portion 50 as a compressive force that compresses them in the axial direction or circumferential direction of the duct sleeve 14, that is, in the direction orthogonal to the plate thickness direction of each parallel plate portion 49 and the connecting portion 50, the moving force and the rotating force Can be received by the parallel plate portions 49 and the connecting portions 50, respectively. Therefore, each compression spring member 48 engages with each of the first and second recesses 46 and 47, so that the fixing member 27 moves along the axial direction of the duct sleeve 14 and the circumferential direction of the duct sleeve 14. In a state where the rotation to the position is restricted and the predetermined rotation position is maintained, the compression sleeve member 48 is fixed to the duct sleeve 14 via the compression spring member 48 at the predetermined insertion position.

  Subsequently, each sheath tube duct sleeve 32 is inserted into the duct sleeve 14 from the inside of the working hole 13 and further inserted into each insertion hole 42 formed in the fitting portion 40 of the fixing member 27. The fixed end portion 32 b of the sheath tube duct sleeve 32 is fixed to the fixing member 27. Thereby, as shown in FIG. 1, each sheath tube duct sleeve 32 is fixed to the duct sleeve 14 via the fixing member 27 in a state where the predetermined arrangement posture is maintained.

  Next, each sheath tube 12 is pulled out from the main tube 11 with the end portion 11b of the main tube 11 butted against the insertion end portion 14a of the duct sleeve 14, and the end portions 12a of the respective sheath tubes 12 are respectively connected to the respective sheath tube ducts. Insert into sleeve 32. At this time, the insertion position of each sheath tube 12 into each sheath tube duct sleeve 32 is secured within each sheath tube duct sleeve 32 by the expansion and contraction due to thermal expansion and contraction of each sheath tube 12 and the movement allowance when an earthquake occurs. Adjust so that the insertion position is appropriate. As a result, when each sheath tube 12 is thermally expanded and contracted while being inserted into each sheath tube duct sleeve 32, or when the sheath tube moves along its axis due to vibration generated in each sheath tube 12 when an earthquake occurs. Each sheath tube 12 is prevented from slipping out from each sheath tube duct sleeve 32 and projecting into the working hole 13 from each sheath tube duct sleeve. Further, as described above, the engaging portion 41 of the plate-like member 35 of the fixing member 27 is engaged with the stepped portion 38 of the annular member 34 from the one end surface 34a side of the annular member 34. When the tubes 12 are inserted into the respective sheath tube duct sleeves 32, or when each sheath tube 12 is thermally expanded and contracted and moved, the fitting portions are inserted into the fitting portions 40 from the respective sheath tubes 12 in the working holes 13. When a pressing force that pushes outward from one side acts via each sheath tube duct sleeve 32, the pressing force acts on the engaging portion 41 as a compressive force that compresses the engaging portion 41 in the thickness direction. To do. Thereby, since the pressing force is received by the engaging portion 41, even when the pressing force is larger than the adhesive strength of the plate-like member 35 to the annular member 34, the fitting portion 40 passes through the annular member 34 in the work hole. 13 is prevented from moving toward the outside. By inserting each sheath tube 12 into each sheath tube duct sleeve 32, each sheath tube 12 is connected to the duct sleeve 14 via each sheath tube duct sleeve 32 and a fixing member 27, respectively, as shown in FIG. The

  Further, the separator 18 in the main pipe 11 is inserted into the annular member 34 of the fixing member 27 through the duct sleeve 14, and the respective end portions 40 b in the left and right directions of the fitting portions 40 are respectively inserted into the notches 28 of the separator 18. By inserting the separator 18, the separator 18 is supported by the fitting portion 40 as described above. At this time, the recesses 26 of the extended portions 22 of the separators 18 are engaged with the protrusions 39 formed on the inner peripheral surface 34 b of the annular member 34.

  Subsequently, the end portion 11 b of the main pipe 11 is inserted into the insertion end portion 14 a of the duct sleeve 14. At this time, the insertion position of the main pipe 11 into the duct sleeve 14 is the expansion / contraction allowance due to the thermal expansion / contraction of the main pipe 11 and the occurrence of an earthquake, similarly to the insertion of the respective sheath pipes 12 into the respective sheath pipe duct sleeves 32. The insertion position is adjusted so that the movement becomes a proper insertion position secured in the duct sleeve 14. As a result, the main pipe 11 is connected to the duct sleeve 14 as shown in FIG.

  The main pipe 11 and the respective sheath pipes 12 are connected to the duct sleeve 14 to be connected to the wall body 13a of the working hole 13 through the duct sleeve, whereby the main pipe 11 and the respective pipes to the wall body 13a are connected. The connecting operation of the sheath tube 12 is completed.

  When each sheath pipe duct sleeve is transported to the construction site in a state assembled to the Lotus pipe as in the conventional case, when the other end of each sheath pipe duct sleeve protrudes from the connection end of the Lotus pipe. When the Lotus pipe falls, the ground pipe is grounded from the other end of each sheath pipe duct sleeve, so that the weight of the Lotus pipe heavier than each sheath pipe duct sleeve is applied to each sheath pipe duct sleeve. There is a risk of damage.

  On the other hand, according to the present embodiment, since the conventional lotus pipe can be dispensed with, the sheath pipe duct sleeve 32 and the fixing member 27 are different from the conventional case in which each is integrally incorporated in the lotus pipe. The sheath tube duct sleeve 32 and the fixing member 27 can be individually transported to the construction site and assembled to the duct sleeve 14 at the construction site.

  As a result, even if the sheath tube duct sleeve 32 falls from the end of the sheath tube duct sleeve 32 during transportation, the weight of the lotus tube heavier than that of the sheath tube duct sleeve 32 is not applied to the sheath tube duct sleeve 32. . Therefore, it is possible to surely prevent the conventional sheath duct sleeve 32 from being damaged.

  As described above, the insertion end 14 a of the duct sleeve 14 is formed with the accommodating portion 14 d that accommodates the fixing member 27, and the duct sleeve 14 is provided on the wall 13 a of the working hole 13. In this state, the fixing member 27 is allowed to be inserted into the working hole 13 from the inside of the working hole 13, so that the fixing member 27 can be inserted into the accommodating portion 14 d of the duct sleeve 14 from within the working hole 13. Thereby, compared with the case where the fixing member 27 is inserted into the duct sleeve 14 from the outside of the working hole 13, the inserting operation of the fixing member 27 into the duct sleeve 14 can be easily performed.

  Furthermore, as described above, the duct sleeve 14 is formed between the insertion end portion 14a and the accommodating portion 14d so that the projecting portion 31 projects inward of the duct sleeve and can contact the end surface 11c of the main pipe 11. In the illustrated example, the protruding portion 31 is formed at a position substantially in contact with the fixing member 27 placed at the predetermined insertion position in the accommodating portion 14d of the duct sleeve 14.

  Therefore, when a force that pushes the fixing member 27 from the inside of the accommodating portion 14 d toward the insertion end portion 14 a is applied, the force acts as a compressive force that compresses the protruding portion 31 in the axial direction of the duct sleeve 14. Since it acts from the fixing member 27, the force can be received by the protruding portion 31. As a result, the movement of the fixing member 27 from the predetermined insertion position in the accommodating portion 14d toward the insertion end portion 14a of the duct sleeve 14 can be more reliably restricted.

  Further, when the end portion 11 b of the main pipe 11 is inserted into the insertion end portion 14 a of the duct sleeve 14, a force toward the work hole 13 acts on the main pipe 11, thereby causing the main pipe 11 to move inside the duct sleeve 14. Is moved toward the working hole 13, that is, toward the fixing member 27, the end surface 11 c of the main pipe 11 contacts the protruding portion 31 before contacting the fixing member 27. Thereby, since the movement of the main pipe 11 toward the fixing member 27 is restricted, the force acting on the main pipe 11 is prevented from acting on the fixing member 27 from the main pipe 11. Therefore, the engagement of the fixing member 27 with the duct sleeve 14 due to the force acting on the main pipe 11 being transmitted to the fixing member 27 can be reliably prevented.

  As mentioned above, although the Example of this invention was described along drawing, the specific structure is not restricted to an above-described structure, The structure by which the design change of the range which does not deviate from the summary of this invention is also contained in this invention. .

  For example, in this embodiment, each compression spring member 48 of the restricting means 45 is formed by bending a plate member and has a Z-shaped cross section, but instead, each compression spring member 48 is shown. For example, a spring member other than a spring member formed of a plate member, such as a compression coil spring, can be applied to the present invention. When each compression coil spring is used, each compression spring is accommodated in each first recess such that its respective axis line is along the depth direction of each first recess 46. Moreover, not only a spring member but a compression member can be comprised by the member which has rubber elasticity, for example.

  Further, in this embodiment, as shown in FIG. 9, the main pipe 11 is constituted by two pipe bodies 51 and 52 connected in series, and separators 53 and 54 are arranged in the pipe bodies 51 and 52, respectively. can do.

  In this case, one tube body 51 has a connection end portion 51a connected to the duct sleeve 14 at one end portion, and a fitting end portion fitted to one end portion 52a of the other tube body 52 at the other end portion. 51b. The one pipe body 51 is inserted through the duct sleeve 14 in the same manner as the connection of the main pipe 11 to the wall body 13a by inserting the connection end part 51a of the one pipe body 51 into the insertion end part 14a of the duct sleeve 14. Connected to the wall 13a.

  The other tube body 52 is connected to the one tube body 51 by fitting one end portion 52a of the other tube body 52 to the fitting end portion 51b of the one tube body 51 from the outside.

  Each of the first and second separators 53 and 54 has a plate-like shape having a flat surface portion 55 and a pair of inclined portions 56 (one inclined portion 56 is shown in FIG. 9), like the separator 18. It has a portion 57 and a pair of elongated portions 58 (see FIG. 10), and has an elongated shape that extends along the axial direction of each tubular body 51, 52 as a whole.

  As shown in FIG. 10, the pair of notches 28 described above are formed in each extending portion 58 in the one end portion 53 a of the first separator 53 disposed in the one pipe body 51. As in the case of the separator 18, the first separator 53 is fixed to the duct sleeve 14 through the fixing member as shown in FIG. 9 when the notches 28 engage with the fixing member 27.

  Unlike the first separator 53, the second separator 54 disposed in the other tubular body 52 is not formed with the notch 28 at the one end 54a, and the other tubular body 52 is disposed on the one tubular body 52. In a state of being connected to the tube body 51, the one end portion 54 a is disposed so as to abut against the other end portion 53 b of the first separator 53.

  Both the first and second separators 53 and 54 are connected to each other via a separator joint 59 in the illustrated example.

  The separator joint 59 is disposed below the first and second separators 53 and 54 so as to straddle both separators. 10 and 11, the separator joint 59 is a flat plate portion extending along the longitudinal direction of each separator 53, 54 below the flat portion 55 of each of the first and second separators 53, 54. 60 and a pair of inclined portions 61 extending obliquely upward along the inclined portions 56 of the first and second separators 53 and 54 from the pair of edge portions 60a facing each other in the width direction of the flat plate portion, respectively. And has a V-shaped cross section as a whole.

  As shown in FIG. 10, insertion holes through which fastening members 62 such as bolts are respectively inserted into the inclined portions 61 of the one end portion 59 a located on the second separator 54 side of both end portions of the separator joint 59. 63 is formed. In addition, each inclined portion 56 in the one end portion 54 a of the second separator 54 is formed with an insertion hole 64 that matches with each of the insertion holes 63. By inserting the fastening member 62 into each pair of insertion holes 63 and 64 that are aligned with each other, the separator joint 59 is fixed to the second separator 54 via the fastening member 62. Thereby, when the second separator 54 moves, the separator joint 59 moves together with the second separator.

  As shown in FIG. 9, the other end portion 59 b of the separator joint 59 is inserted between the first separator 53 and each of the sheath tube duct sleeves 32 accommodated in the one tube body 51. In the state where the separator joint 59 is inserted between the first separator 53 and each sheath pipe duct sleeve 32, the separator joint 59 is supported by each sheath pipe duct sleeve 32 from below, so that the first The movement of the separator joint 59 toward the lower side of the separator 53 is restricted. Thereby, the separator joint 59 is movable relative to the first separator 53 along the longitudinal direction of the first separator in a state where movement along the vertical direction is restricted. Accordingly, when the second separator 54 is thermally expanded and contracted, the separator joint 59 is moved along the longitudinal direction of the first separator 53 by the force received from the second separator 54, so that the heat of the second separator 54 is increased. Expansion and contraction is allowed.

  The amount of insertion of the separator joint 59 between the first separator 53 and each of the sheath tube duct sleeves 32 is such that the expansion / contraction allowance due to thermal expansion / contraction of the second separator 54 and the movement allowance when an earthquake occurs are the first separator 53 and each. The size is secured between the sheath tube duct sleeves 32. Accordingly, when the second separator 54 is thermally expanded and contracted, the separator joint 59 is allowed to move along the longitudinal direction of the first separator 53 between the first separator 53 and each sheath pipe duct sleeve 32. Therefore, the separator joint 59 is prevented from coming out from between the first separator 53 and each sheath pipe duct sleeve 32.

  When the first and second separators 53 and 54 are connected to each other using the separator joint 59, the separator joint 59 is fixed to the second separator 54 in advance, and the other pipe body 52 is connected to the one pipe. When connecting to the body 51, a separator joint 59 is inserted between the first separator 53 and each sheath tube duct sleeve 32. Thereby, both the 1st and 2nd separators 53 and 54 are mutually connected along the axis line of each tubular body 51 and 52 so that relative displacement is possible.

  Further, in the present embodiment, an example in which the end portion 11b of the main pipe 11 is directly connected to the duct sleeve 14 is shown, but instead of this, as shown in FIG. 12, a conventionally well-known adjustment pipe 65 is used. The main pipe 11 can be connected to the duct sleeve 14.

  In this case, as shown in FIG. 12A, the main pipe 11 is disposed so as to be spaced between the end portion 11 b and the insertion end portion 14 a of the duct sleeve 14. Further, in the illustrated example, a fitting portion 11d into which the adjustment tube 65 is fitted is formed at the end portion 11b of the main pipe 11. In the illustrated example, a short tube 66 is connected to the insertion end portion 14a of the duct sleeve 14 at its one end portion 66a.

  In the illustrated example, the adjustment pipe 65 includes a pipe main body 67 disposed between the duct sleeve 14 and the main pipe 11, and a slide pipe 68 provided on the pipe main body and slidable along the axis of the pipe main body. And have.

  The pipe body 67 has a length dimension smaller than the distance between the short pipe 66 and the main pipe 11, and has a fitting end portion 67 a fitted into the fitting portion 11 d of the main pipe 11 at one end portion. . The pipe main body 67 is connected to the main pipe 11 by fitting the fitting end 67 a to the fitting section 11 d of the main pipe 11. A slide tube 68 is slidably fitted to the other end 67b of the tube body 67 from the outside. A plurality of sheath tubes 69 are accommodated in the tube body 67 so as to extend along the axis of the tube body 67. Of the pair of end portions of each sheath tube 69, one end portion 69a located on the other end portion 67b side of the tube main body 67 is connected to the terminal sheath tube 70 at its one end portion 70a. Each sheath tube 12 in the main tube 11 is connected to the other end portion of each sheath tube 69 at 69b.

  The slide tube 68 has a length dimension that is greater than the distance between the other end portion 67 b of the tube body 67 and the other end portion 66 b of the short tube 66. Further, the slide tube 68 has one end 68a fitted to the other end 67b of the tube body 67 and the other end 68b fitted to the other end 66b of the short tube 66 from the outside, thereby It straddles between the main body 67 and the short tube 66.

  Each terminal sheath tube 70 extends inside the slide tube 68 and is inserted into each sheath tube duct sleeve 32 fixed to the duct sleeve 14 via a fixing member 27. The insertion amount of each terminal sheath tube 70 into each sheath tube duct sleeve 32 is due to thermal expansion and contraction of each sheath tube 12 in the same manner as described above in which each sheath tube 12 is inserted into each sheath tube duct sleeve 32. The expansion allowance and the movement allowance when an earthquake occurs are set to a size that can be secured in each of the sheath tube duct sleeves 32.

  When the main pipe 11 is connected to the duct sleeve 14 using the adjustment pipe 65, first, the work hole 13 provided with the duct sleeve 14 is sequentially connected in series from the wall of the work hole toward the work hole 13. As shown in FIG. 12B, a pipe main body 67 of an adjustment pipe 65 in which a slide pipe 68 is provided in advance on the final main pipe 11 closest to the working hole 13 among the plurality of main pipes 11 connected. The sheath in the pipe body 67 of the adjustment pipe 65 is connected to the sheath pipe 12 in the final main pipe 11 among the plurality of sheath pipes 12 connected in series from the wall of the other working hole. Tubes 69 are connected to each other, and terminal sheath tubes 70 are connected to the respective sheath tubes.

  Next, the fixing members 27 to which the respective sheath tube duct sleeves 32 and the separators 18 are respectively attached in advance are inserted into the accommodating portions 14 d of the duct sleeve 14 from the work holes 13. At this time, each sheath pipe duct sleeve 32 has a terminal corresponding to each of the sheath pipe duct sleeves 32 and 69 so that the expansion allowance due to thermal expansion and contraction and the movement allowance when an earthquake occurs are secured in each sheath pipe duct sleeve 32. The sheath tube 70 is inserted. Thereby, in a state in which each terminal sheath tube 70 is prevented from being pulled out from the inside of each sheath tube duct sleeve 32, each sheath tube 12 and each sheath tube duct sleeve 32 of the main tube 11 are connected to each other as shown in FIG. As shown in FIG. 4, the adjustment pipes 65 are connected to each other through the respective sheath pipes 69 and the terminal sheath pipes 70.

  Subsequently, after the fixing member 27 is inserted into the accommodating portion 14d to the predetermined insertion position, each compression spring member 48 is engaged with each second recess 46, whereby the fixing member 27 is connected to the duct sleeve 14. To fix. Thereby, each sheath pipe duct sleeve 32 and the separator 18 are each fixed to the duct sleeve 14 via the fixing member 27.

  Thereafter, the slide tube 68 is slid along the axis of the tube body 67 from the position indicated by the two-dot chain line in FIG. 12A toward the short tube 66, and the other end 68 b of the slide tube 68 is connected to the short tube 66. The slide tube 68 is connected to the short tube 66 by fitting to the other end portion 66b of the other end portion 66b from the outside. Thereby, the slide tube 68 is straddled between the tube main body 67 and the short tube 66. When the slide tube 68 straddles between the tube main body 67 and the short tube 66, the tube main body 67 is connected to the short tube 66 via the slide tube 68, whereby the main tube 11 is connected via the adjustment tube 65 and the short tube 66. To the duct sleeve 14.

  Conventionally, when a pipe line for the optical communication cable 15 is formed between the two work holes 13, the end-point side Lotus pipe to which the plurality of sheath pipe duct sleeves 32 are fixed is connected to the other work hole 13 on the end-point side. The duct sleeve 14 provided in the wall body 13a is connected in advance or a plurality of sheath tube duct sleeves 32 are connected to the duct sleeve 14 provided in the wall body 13a of the other work hole 13 in advance of the other work hole 13. In order to connect the sheath pipe 12 in the final main pipe 11 and the respective sheath pipe duct sleeves 32, it is necessary to insert them from the side and fix them via the fixing member 27. It is necessary to perform the exchange connection work using the adjustment pipe 65 between the pipe 11 and the end-point side Lotus pipe or the duct sleeve 14.

  For this reason, at the time of connecting each sheath pipe duct sleeve 32 and the sheath pipe 12 in the final main pipe 11, at least the end portion 11 b of the final main pipe 11 and the other side in order to perform exchange connection work. It is necessary to secure a work space between the work hole 13 and the wall 13a in the ground.

  Therefore, for example, when the other work hole 13 is provided in the vicinity of the road and the pipe line is formed so as to cross the road toward the other work hole 13, When excavating the ground to form the working space, the excavation area protrudes greatly into the road, which causes significant road traffic restrictions during connection work.

  On the other hand, according to the present invention, as described above, the fixed end portion 14b of the working hole 13 of the duct sleeve 14 is formed with the storage portion 14d that stores the fixing member 27, and the storage portion is the duct. Since the fixing member 27 is allowed to be inserted into the work hole 13 in a state in which the sleeve 14 is provided in the wall 13 a of the working hole 13, the fixing member 27 is inserted into the accommodating portion 14 d of the duct sleeve 14 from the working hole 13. Further, each sheath pipe duct sleeve 32 can be inserted into the duct sleeve 14 from the working hole 13 and attached to the fixing member 27 to be fixed to the duct sleeve 14 via the fixing member.

  Thereby, when forming the pipe line for the optical communication cable 15 between the two work holes 13 by using the main pipe 11 and the sheath pipe 12, the end point from the wall body 13a of the one work hole 13 on the start point side. When the main pipe 11 and the sheath pipe 12 are sequentially connected toward the wall body 13a of the other working hole 13 on the side, for example, the pipe of the adjustment pipe 65 in which the slide pipe 68 is provided on the final main pipe 11 After connecting the main body 67, connecting the sheath pipe 69 in the pipe main body 67 to the sheath pipe 12 accommodated in the final main pipe 11, and further connecting the terminal sheath pipe 70 to the sheath pipe, By inserting the sheath tube duct sleeve 32 together with the fixing member 27 into the duct sleeve 14 provided in the wall 13a of the other working hole 13, the terminal sheath tube 70 is inserted into the sheath tube duct sleeve 32. The sheath tube 12 of the final main pipe 11 A sleeve pipe duct sleeve 32 through the sleeve pipe 69 and sleeve pipe 70 terminal of the adjusting tube 65 can be connected to each other.

  Therefore, unlike the case where it is necessary to previously fix the sheath tube duct sleeve 32 to the duct sleeve 14 as in the prior art, the sheath tube 12 in the final main tube 11 and each sheath tube duct sleeve 32 are connected. Therefore, it is not necessary to perform a conventional exchange connection work between the final main pipe 11 and the duct sleeve 14.

  Therefore, in order to connect the sheath tube duct sleeve 32 and the sheath tube 12 in the final main tube 11, the slide tube 68 is slid after the sheath tube duct sleeve 32 and the terminal sheath tube 70 are connected. Thus, a space for performing the operation of straddling the slide tube between the tube main body 67 of the adjustment tube 65 and the duct sleeve 14, that is, a state before the slide tube 68 slides toward the duct sleeve 14 (FIG. It is sufficient to secure a space between the one end 68a of the slide tube 68 and the wall 13a of the other working hole 13 in the ground.

  Thereby, compared with the case where it is necessary to ensure a space between the end portion 11b of the final main pipe 11 and the wall body 13a of the other working hole 13 as in the case of performing conventional exchange connection work. The size of the work hole 13 on the end point side of the work space to be secured in the ground from the wall body 13a can be reliably reduced.

  Therefore, for example, even when the other work hole 13 is provided in the vicinity of the road and the pipe line is formed so as to cross the road toward the other work hole 13, When excavating the ground to form the working space around, the excavation area is prevented from protruding into the road as much as when performing conventional exchange connection work. Can be reliably prevented from incurring significant traffic restrictions.

  In the present embodiment, the separator 18 is divided into two pipes when the inside of the main pipe 11 and the duct sleeve 14 is viewed in cross section, but instead, the main pipe 11 and the duct sleeve 14 are shown. A separator that divides the inside into three or more pipelines when viewed in cross section can be used in the present invention.

  Further, in the present embodiment, an example is shown in which the separator 18 that divides the main pipe 11 and the duct sleeve 14 in the vertical direction when viewed in the cross section is disposed in the main pipe 11 and the duct sleeve 14. Thus, the separator 18 can be dispensed with.

  In this case, each protrusion 25 formed on the inner peripheral surface 11a of the main pipe 11 and the pair of protrusions 39 formed on the inner peripheral surface 34b of the annular member 34 of the fixing member 27 are not required. it can.

  Further, in this case, as shown in FIG. 13, the plate-like member 35 of the fixing member 27 is fitted into the annular member 34 and the fitting portion 71 is formed in the fitting portion. It can be constituted by a plate-like member 73 having an engaging portion 72 that engages with the stepped portion 38 of the annular member 34 when the fitting portion 71 is fitted.

  The fitting portion 71 is made of a circular plate member having a diameter substantially equal to the inner diameter of the annular member 34. The fitting portion 71 is formed with a plurality of first insertion holes 74 through which the respective sheath tube duct sleeves 32 are inserted, and a plurality of second insertion holes 75 through which the respective pull-in cables 17 are respectively inserted. ing. Each of the first insertion holes 74 is formed in the lower half portion of the fitting portion 71 as viewed in FIG. 13 in the illustrated example, and each of the second insertion holes 75 is fitted in the illustrated example. The joint portion 71 is formed in the upper half portion as viewed in FIG.

  The engaging portion 72 projects from the peripheral surface 71a in the lower half of the fitting portion 71 outward in the radial direction of the fitting portion 71 and extends along the peripheral surface 71a.

  The plate-like member 73 has its engaging portion 72 joined to the stepped portion 38 or the peripheral surface 71a of the fitting portion 71 joined to the inner peripheral surface 34b of the annular member 34 with a joining material such as an adhesive. The fitting portion 71 is fitted in the annular member 34 and the engaging portion 72 is fixed to the annular member 34 with the stepped portion 38 engaged.

  In the present embodiment, the restricting means 45 includes a pair of first recesses 46 formed on the outer peripheral surface 34 c of the annular member 34 and a pair of inner peripheral surfaces 14 c of the accommodating portion 14 d of the duct sleeve 14. However, instead of this, for example, the outer peripheral surface 34c of the annular member 34 or the accommodating portion 14d of the duct sleeve 14 is shown. It can be comprised with the adhesive agent apply | coated to the internal peripheral surface 14c.

  In this case, for example, the one end surface 34a of the fixing member 27 is marked at a predetermined position, and a mark that matches the mark when the fixing member 27 is at the predetermined insertion position in the accommodating portion 14c. It can be attached to the inner peripheral surface 14 c of the accommodating portion 14 d of the duct sleeve 14 or the inner peripheral surface 30 a of the enlarged diameter portion 30. Thereby, when the fixing member 27 is inserted into the accommodating portion 14d, the operator visually recognizes from the inside of the working hole 13 that the both marks are aligned with each other, whereby the fixing member 27 is inserted into the accommodating portion 14d. It can be arranged at the predetermined insertion position.

  Furthermore, in the present embodiment, an example in which the present invention is applied to the pipe connection structure 10 in which the main pipe 11 is directly connected to the duct sleeve 14 without using a conventional Lotus pipe has been shown. The present invention can be applied to a pipe connection structure in which the pipe 11 is connected to the duct sleeve 14 via a conventional lotus pipe.

It is a longitudinal section showing the piping connection structure concerning the present invention roughly. It is a transverse cross section showing roughly the state where the sheath pipe concerning the present invention was stored in the main pipe. It is an exploded perspective view showing roughly the state where the separator concerning the present invention was fixed to the fixing member. It is a front view which shows roughly the fixing member which concerns on this invention. (A) is a side view which shows schematically the annular member which concerns on this invention, (b) is a front view which shows schematically the annular member which concerns on this invention. (A) is a top view which shows schematically the plate-shaped member which concerns on this invention, (b) is a front view which shows schematically the plate-shaped member which concerns on this invention. (A) is a longitudinal cross-sectional view which shows schematically the state which inserts the fixing member which concerns on this invention in the enlarged diameter part of a duct sleeve, (b) is a fixing member which concerns on this invention, and the enlarged member of a duct sleeve is shown. It is a longitudinal cross-sectional view which shows schematically the state inserted and inserted in the duct sleeve, (c) is the state which the fixing member which concerns on this invention was inserted in the predetermined insertion position in the duct sleeve roughly It is a longitudinal cross-sectional view shown. It is a perspective view showing roughly the compression spring member concerning the present invention. It is a longitudinal section showing roughly the state where separators concerning the present invention were connected by a joint for separators. It is a top view which shows roughly the state from which the 1st and 2nd separator which concerns on this invention was mutually connected by the coupling for separators. It is a transverse cross section showing roughly the state where the joint for separators concerning the present invention was arranged in the main pipe. (A) is a longitudinal sectional view schematically showing a state in which the main pipe and the duct sleeve according to the present invention are connected to each other by the adjustment pipe, and (b) is an adjustment of the main pipe and the duct sleeve according to the present invention. It is a longitudinal cross-sectional view which shows schematically the state by which the adjustment pipe | tube was connected to the main pipe before connecting mutually with a pipe | tube. The fixing member shown in FIGS. 1 to 12 is a front view schematically showing a fixing member according to another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pipe connection structure 11 Main pipe 12 Sheath pipe 13 Working hole 13a Wall body 14 Duct sleeve 14d Accommodating part 27 Fixing member 31 Protruding part 32 Sheath pipe duct sleeve 34c Opposite surface (outer peripheral surface of annular member)
45 Restricting means 46, 47 Concavity (first recess, second recess)
48 Compression spring member 18 Separator

Claims (6)

  A sheath tube into which a cable is inserted, a main tube that accommodates the sheath tube, a wall body that defines a work hole for relaying the cable, and an end portion of the main tube that is provided on the wall body A cylindrical duct sleeve, and a sheath duct that is housed in the duct sleeve and into which the end of the sheath pipe is inserted so as to be relatively displaceable to allow thermal expansion and contraction and movement along the axis of the sheath pipe A sleeve, and a fixing member that is inserted into the duct sleeve and fixes the sheath tube duct sleeve to the duct sleeve, and between the fixing member and the duct sleeve, is inserted into the duct sleeve. Restricting means for restricting movement of the fixing member along the axial direction of the duct sleeve and rotation of the fixing member around the axis of the duct sleeve at a predetermined insertion position of the fixing member is provided. When Piping connection structure that.   The fixing member has a facing surface facing the inner peripheral surface of the duct sleeve, and the restricting means is provided on the facing surface, and is a compression member that is compressible and deformable toward the facing surface, and the duct sleeve The fixing member is placed in a rotational position when the arrangement posture of the sheath tube duct sleeve formed at a portion of the inner peripheral surface of the inner peripheral surface at the predetermined insertion position is fixed to the fixing member. The pipe connection structure according to claim 1, further comprising: a recess that enters when the compression member is released from compression.   Of the both ends of the duct sleeve, at the end located on the inner side of the working hole, the fixing member is allowed to be inserted from the working hole while the duct sleeve is provided on the wall body, The pipe connection structure according to claim 1, wherein an accommodation portion that accommodates the fixing member is formed.   The duct sleeve has an insertion end portion into which an end portion of the main pipe is inserted, and the duct sleeve has a protruding portion that protrudes inward of the duct sleeve and that can contact the end surface of the main pipe. The pipe connection structure according to claim 3, wherein the pipe connection structure is formed between the insertion end portion and the accommodating portion.   The main pipe and the duct sleeve to which the main pipe is connected extend along the axis thereof so as to straddle the main pipe and the duct sleeve, and at least two in the main pipe and the duct sleeve, respectively. 5. A separator for dividing the inside of the main pipe and the inside of the duct sleeve into at least two sections in order to form a pipe line when viewed in respective cross-sections is provided. The pipe connection structure described in the paragraph.   Inserted in a cylindrical duct sleeve provided in a wall body defining a working hole for relaying a cable inserted in a sheath pipe accommodated in the main pipe and connected to the main pipe, and in the duct sleeve A fixing member for fixing to the duct sleeve a sheath pipe duct sleeve which is accommodated and inserted so that the end portion of the sheath pipe is relatively displaceable along an axis thereof, and a predetermined insertion position into the duct sleeve And a restricting means for restricting movement along the axial direction of the duct sleeve and rotation around the axis of the duct sleeve.

Images