JP2013133611A - Pull-out jig for piping member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily install, even in a narrow space, a pull-out jig of a piping member, which includes a pull-out piece member disposed on a pull-out direction proximal end side of the piping member buried through a floor slab or a wall of a building, a shaft member passing through the piping member and supporting the pull-out piece member, a support member supporting the shaft member at a position separated from the floor slab or the wall in the pull-out direction of the piping member, a pair of leg members having the shaft member therebetween and holding the support member at the position separated from the floor slab or the wall in the pull-out direction of the piping member, and a propulsion mechanism for driving the pull-out piece in the pull-out direction along an axis of the shaft member, and is for driving the piping member in the pull-out direction and pulling it out from the floor slab or the wall by supporting an end face on the pull-out direction proximal end side of the piping member by the pull-out piece member and driving it in the pull-out direction by the propulsion mechanism.SOLUTION: Disposition is executed to a support member 31 so as to change a disposition interval distance between a pair of leg members 41, 41.

Description

  The present invention relates to a piping member extraction jig. Specifically, a drawing piece member disposed on the base end side in the drawing direction of a piping member embedded through a floor slab or wall of a building, and a shaft member that passes through the piping member and supports the drawing piece member A support member that supports the shaft member at a position spaced from the floor slab or wall in the pulling-out direction of the piping member; and the support member is placed from the floor slab or wall to the piping member with the shaft member interposed therebetween. A pair of leg members that are held at positions spaced apart in the drawing direction; and a propulsion mechanism that pushes the drawing piece in the drawing direction along the axis of the shaft member, and an end surface of the piping member on the proximal side in the drawing direction Is pulled by the pulling piece member and propelled in the pulling direction by the propulsion mechanism to pull the piping member pulled out from the floor slab or wall. On the can jig.

  Such an extraction jig for piping members (hereinafter sometimes simply referred to as an extraction jig) is proposed in Patent Document 1 by the present applicant. In the extraction jig described in Patent Document 1, a shaft member supported by a gate-shaped support member erected on a floor slab is passed through a drainage pipe joint embedded in the floor slab and disposed at the lower end thereof. The lower end of the drainage pipe joint is supported by the piece member, and the drainage pipe joint can be raised and pulled out from the floor slab by raising the piece member. Such a pulling jig supports and pulls the end face of a piping member such as a drainage pipe joint, so the piping member has a shape that is difficult to grip from the outside, or when the amount of protrusion from the floor slab is small and cannot be gripped Even so, it can be easily pulled out. That is, it can be easily pulled out without being restricted by the outer shape or the embedded state of the piping member. Its usefulness has already been recognized at actual sites in the construction of drainage facilities such as apartment buildings.

JP 2011-231577 A

  By the way, in apartment houses and the like, pipes for water supply and drainage, gas pipes and the like are often piped in a pipe shaft. In the pipe shaft, meters are arranged in the vicinity of the entrance and exit, and the piping system is often arranged near the wall. In that case, when the piping member is to be pulled out, the installation space for the pulling jig is limited, and it may be difficult to arrange or difficult to pull out, and workability may be poor.

  In view of this situation, an object of the present invention is to provide an extraction jig that can be easily installed in a narrow space in order to improve workability and make extraction easier.

In order to solve the above problems, the present invention employs the following means.
The present invention relates to a drawing piece member disposed on the base end side in a drawing direction of a piping member that is embedded in a floor slab or wall of a building, and a shaft member that passes through the piping member and supports the drawing piece member A support member that supports the shaft member at a position spaced from the floor slab or wall in the pulling-out direction of the piping member, and the support member is disposed from the floor slab or wall with the shaft member interposed therebetween. A pair of leg members that are held at positions spaced apart in the pulling direction, and a propulsion mechanism that propels the pulling piece in the pulling direction along the axis of the shaft member, and is provided on the proximal side in the pulling direction of the piping member. Pulling the piping member that supports the end surface with the pulling piece member and pushes the piping member in the pulling direction by pulling it from the floor slab or the wall by propelling in the pulling direction by the propulsion mechanism. A come jig, a pull-out jig pipe member characterized by arrangement distances distance between the pair of leg members are arranged relative to the support member can be changed.

  According to such a pulling jig, the distance between the leg members is appropriately changed according to the position (the position capable of supporting the load applied during pulling) where the leg member can be placed on the floor or wall surface. A drawing jig can be arranged. Therefore, it is possible to exhibit flexibility with respect to restrictions on the installation space, and it is easy to install in a narrow space.

  In this invention, it is preferable that the said shaft member is arrange | positioned so that the support position by the said support member can be changed between a pair of said leg members. In this case, the piping member can be pulled out even when the position where the piping member is embedded between the leg members is deviated toward the one leg member, and the flexibility of the installation space can be further improved.

  Further, it is also preferable that each of the pair of leg members is arranged so that the leg length with respect to the support member can be individually adjusted. In this case, the pair of leg members can be arranged at different positions by individually adjusting the leg lengths.

  According to the piping member drawing jig of the present invention, it is easy to install in a narrow space.

It is a front view of the extraction jig concerning the embodiment of the present invention, and is a figure showing the state before extracting a drainage stack. It is a front view of the extraction jig | tool shown by FIG. 1, and is a figure which shows the state after extracting the drainage stack. It is a top view of the extraction jig | tool shown by FIG. It is IV-IV sectional drawing of the extraction jig | tool shown by FIG. It is a figure which expands and shows the VV cross section of the extraction jig | tool shown by FIG. (A) is a figure which shows the fixing structure to the shaft member of the detent | locking bar in the extraction jig | tool shown by FIG. 1 in the cross section orthogonal to an axial direction, (B) is the figure which shows the example 1 of the change. is there. It is a figure which shows another example of use of the extraction jig | tool shown by FIG. It is a front view of extraction of an extraction jig concerning modification 2 of an embodiment of the present invention. (A) is a figure which expands and shows the to-be-fitted part of the shaft member which comprises the extraction jig | tool shown by FIG. 8, (B) is the B arrow directional view. (C) is CC sectional drawing of the extraction jig | tool (shaft member) shown by FIG. It is a figure which expands and shows the axial direction cross section of the extraction piece member of the extraction jig | tool which concerns on the modification 3 of embodiment of this invention, (A) shows the mode before extraction, (B) is the mode at the time of extraction FIG. It is a figure which expands and shows the axial direction cross section of the extraction piece member of the extraction jig | tool which concerns on the modification 4 of embodiment of this invention, (A) shows the mode before extraction, (B) shows the state at the time of extraction FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show a state in which the drainage stack 11 embedded in the floor slab S is lifted and pulled out as an example of a usage pattern of the drawing jig 21 of the present embodiment. Here, the drainage stack 11 has a straight tubular shape and is backfilled with mortar Mr while being inserted into the through hole CH formed in the floor slab S. Note that the drainage stack 11 is cut off at the top and bottom with a portion that is backfilled interposed therebetween. The drainage stack 11 corresponds to the piping member of the present invention.

  The extraction jig 21 includes a support member 31, a pair of leg members 41, 41, a shaft member 51, an extraction piece member 61, and a propulsion mechanism 71 that propels the extraction piece member 61 in the extraction direction. . First, each member which comprises this extraction jig | tool 21 is demonstrated.

<About Support Member 31>
The support member 31 is a long member. As shown in FIG. 3, the support member 31 includes parallel elongated plate-like portions 35, 35 which form an elongated gap 33 and face each other. One end 37 in the longitudinal direction of the plate-like portions 35, 35 is connected, the other end 39 is not connected, and the support member 31 is U-shaped as a whole. As shown in FIG. 4, the support member 31 is arranged so that the plate surfaces of the plate-like portions 35, 35 are along the drawing direction in a state where the longitudinal direction thereof is orthogonal to the drawing direction of the drainage stack 11. Is done. That is, the gap 33 is arranged so as to penetrate in the drawing direction and extend in a direction orthogonal to the drawing direction. 1, it is supported by the pair of leg members 41, 41 in the arrangement state, and is held away from the drainage stack 11 to be pulled out in the drawing direction (upward).

<Regarding the leg members 41, 41>
The leg members 41, 41 are formed of two rod-shaped members that make a pair. The leg members 41 and 41 are fixed to the support member 31 so as to be separated from each other in a state orthogonal to the support member 31. Then, the support member 31 is erected on the floor slab S and can be held on the upper side of the floor slab S.

  As shown in FIGS. 3 and 4, the leg members 41 and 41 are fixed to the support member 31 via the slide tools 81 and 81 while being inserted through the gaps 33 of the support member 31. The slide tool 81 is formed by bending a metal strip, and in a natural state before fixing, the slide tool 81 is loosely fitted to the support member 31 so as to surround the paired plate-like portions 35 and 35 from the outside, and is supported. It is a member that can slide along the longitudinal direction of the member 31. As shown in FIG. 5, the slide tool 81 has a ring shape (substantially C-shaped) with a part missing as viewed in a cross section orthogonal to the longitudinal direction of the support member 31, and straddles the annular gap 33. The portion is set as a pair of opposed flat plate portions 85 and 85 having a through hole 83 through which the leg member 41 can be passed. The annular missing portion is provided at a position where the annular shape of the slide tool 81 can be bent to bring the flat plate portions 85 and 85 closer to each other. That is, in the natural state, the slide tool 81 is fitted with a slight play on the outer periphery of the support member 31 (plate-like portions 35, 35), and can slide along the longitudinal direction of the support member 31. The support member 31 can be tightly sandwiched by bending the opposing flat plate portions 85 and 85 in a direction approaching each other against the elasticity of the above.

  The leg members 41 and 41 are metal round bar-like members, and screw grooves are continuously formed on the outer peripheral surface thereof over the entire length. Each leg member 41 is inserted into the through hole 83, 83 formed in both flat plate portions 85 of the slide tool 81 fitted on the outer periphery of the support member 31, and is inserted into the gap 33 of the support member 31. The two nuts 43 and 43 screwed at positions sandwiching 81 from the outside in the axial direction are prevented from coming off from the through holes 83 and 83. The nuts 43 and 43 are screwed into the leg member 41 in a state where the distance between the nuts 43 and 43 is reduced against the elasticity of the slide tool 81 fitted on the support member 31. Accordingly, the support member 31 (plate-like portions 35, 35) is tightly sandwiched by the flat plate portions 85, 85, and the slide tool 81 is fixed to the support member 31 so as not to slide, and the slide The leg member 41 is fixed to the support member 31 via the tool 81. According to the fixing structure of the leg member 41 with respect to the support member 31, the distance between the leg members 41 and 41 can be reduced by sliding the slide tools 81 and 81 along the longitudinal direction of the support member 31 before fixing. Can be adjusted in stages. Moreover, the leg length of each leg member 41 can be individually adjusted steplessly by changing the screwing position of the nuts 43 in the axial direction of the leg member 41. The leg length of the leg member 41 is the length from the arrangement position of the support member 31 to the floor slab S. As shown in FIG. 1, even when the place where the floor slab S is stepped is used as a scaffold, the support member 31 is orthogonal to the drawing direction by adjusting the leg lengths of the two leg members 41. Can be held.

<About the shaft member 51>
The shaft member 51 is inserted into the gap 33 of the support member 31 and supported by the support member 31 in a state orthogonal to the support member 31 as shown in FIG. The shaft member 51 is supported by the support member 31 via a slide tool 81 having the same configuration as that for fixing the leg member 41 to the support member 31. The shaft member 51 is a metal round bar-like member, and a screw groove is continuously formed on the outer peripheral surface thereof over the entire length. The shaft member 51 is inserted into the gap 33 of the support member 31 through the through holes 83 and 83 formed in both the flat plate portions 85 of the slide member 81 in a natural state loosely fitted on the outer periphery of the support member 31. . Further, the nut 53 screwed to the shaft member 51 is prevented from being pulled out in the direction opposite to the pulling direction at the front end side in the pulling direction from the slide tool 81. Thereby, the shaft member 51 is supported by the support member 31. Here, a thrust bearing 55 is interposed between the nut 53 and the slide tool 81. In this support structure, the slide tool 81 remains loosely fitted to the support member 31 in a slidable manner.

  As shown in FIG. 1 and the like, the shaft member 51 is inserted into the drainage stack 11 when the drainage stack 11 is pulled out. The shaft member 51 is provided with a detent bar 91 that protrudes outward around the shaft so as to be positioned between the drainage stack 11 and the support member 31. The detent bar 91 is a rod-like member formed separately from the shaft member 51, and is detachably fixed to the shaft member 51 via a fixing structure 93. As shown in FIG. 6 (A), the detent bar 91 has a round bar shape, and a male screw 91n is formed at the end on one end side fixed to the shaft member 51. Further, the other end side is provided with an anti-slip indentation 91k. The fixing structure 93 includes an annular member 95. The annular member 95 is a cylindrical shape that is loosely fitted to the shaft member 51 and that has a relatively short axial length. In the annular member 95, three screw holes 97a to 97c are formed penetratingly at intervals of 120 ° around the axis. In the fixing structure 93, in a state where the shaft member 51 is inserted into the annular member 95, the bolts 99a and 99b are screwed into the two screw holes 97a and 97b out of the three screw holes 97a to 97c from the outside. The male screw 91n of the detent bar 91 is screwed into the remaining one screw hole 97c. Then, by pressing the shaft member 51 from three directions with the bolts 99a and 99b and the tip of the rotation preventing bar 91, the annular member 95 is positioned in a state where it cannot rotate relative to the shaft member 51, and the rotation preventing bar 91 is moved to the shaft member. 51 is fixed.

<About the pulling piece member 61>
The drawing piece member 61 is held at the end of the shaft member 51 on the proximal end side in the drawing direction. As illustrated in FIG. 4, the drawing piece member 61 has a shape in which substantially disk-shaped portions having different diameters are stacked coaxially with the shaft member 51, and a through-hole 63 that penetrates in the axial direction is formed at the center. In a state where the shaft member 51 is penetrated through the through hole 63, the shaft member 51 is suspended by the nut 57 that is screwed into the lower end of the shaft member 51 and is held by the shaft member 51. The drawing piece member 61 includes a relatively large-diameter support portion 65 and a relatively small-diameter positioning portion 67 integrally formed on the upper side (the leading end side in the drawing direction), and faces the support portion 65 in the pulling direction. A step portion 65a is formed as an annular surface. The outer diameter of the positioning portion 67 is formed smaller than the inner diameter of the drainage stack 11 and can be inserted into the drainage stack 11 as shown in FIG. The positioning portion 67 has a tapered shape that gradually narrows in the drawing direction, and can guide the insertion into the drainage stack 11 by the tapered shape. The outer diameter of the support portion 65 is formed in a flat cylindrical shape that is larger than the inner diameter of the drainage stack 11 and smaller than the outer diameter of the drainage stack 11. Therefore, when the positioning portion 67 is inserted into the drainage stack 11, the stepped portion 65 a interferes with the lower end surface 11 a of the drainage stack 11.

<Propulsion mechanism 71>
The propulsion mechanism 71 that propels the pulling piece member 61 in the pulling direction is screwed into the shaft member 51 and operates by rotating a nut 53 that prevents the shaft member 51 from coming off from the support member 31. That is, the propulsion mechanism 71 propels the shaft member 51 to be screwed in the pulling direction by rotating the nut 53, and thereby the pulling piece member 61 held at the end is also displaced in the pulling direction together with the shaft member 51. It has become. Here, as shown in FIG. 3, when the nut 53 is rotated in the direction A to operate the propulsion mechanism 71, even if the shaft member 51 tries to rotate following the nut 53, the shaft member The rotation prevention bar 91 provided in 51 is prevented from rotating when it comes into contact with the leg member 41 relatively on the A direction side. Therefore, when the nut 53 is rotated, the shaft member 51 is guided in the drawing direction without rotating. Therefore, as shown in FIG. 1, the drawing piece member 61 can be pushed in the drawing direction (upward) together with the shaft member 51 by turning the nut 53 using a tool such as a ratchet wrench T or a spanner (see FIG. 1). 2). According to this propulsion mechanism 71, when there is sufficient room for displacement of the shaft member 51 in the pulling direction, the shaft member 51 can be displaced in the pulling direction until the main body or the accompanying structure of the detent bar 91 is supported. In this propulsion mechanism 71, the nut 53 is easily rotated smoothly by the thrust bearing 55 interposed between the nut 53 and the slide tool 81.

  Hereinafter, the characteristics of the extraction jig 21 will be described in more detail while explaining the operation procedure for a series of operations for extracting the drainage stack 11 from the assembly / installation of the extraction jig 21. Note that this work procedure is merely an example, and the present invention is not limited to this. In an actual work site, a work procedure may be determined as appropriate according to restrictions on the work space and the number of work personnel.

  First, the sliding tools 81 and 81 are temporarily fixed to the two leg members 41 and 41, respectively. That is, nuts 43 and 43 are screwed into the leg member 41 in a state where the leg member 41 is inserted into the through holes 83 and 83 of the slide tool 81. The arrangement interval of the nuts 43, 43 in the leg member 41 is set so that the slide tool 81 is not deformed but does not move greatly in the axial direction. Here, it is preferable to set the temporary fixing position of the slide tool 81 in the axial direction of the leg member 41 in view of the leg length of the final leg member 41. The final leg length of the leg member 41 is to ensure a displaceable distance of the shaft member 51 necessary to completely pull out the drainage stack 11 from the floor slab S between the support member 31 and the floor slab S. It is desirable to set so that the support member 31 can be held at a position away from the floor slab S. In such a holding position, the final leg lengths of the leg members 41 and 41 are individually set in consideration of the level difference of the floor slab S so that the support member 31 is disposed perpendicular to the pulling direction.

  Next, each slide tool 81 is externally fitted to the support member 31. As shown in FIG. 4, the slide tool 81 (81 a) temporarily fixed to one leg member 41, the slide tool 81 (81 b) for supporting the shaft member 51 on the support member 31, and the other leg member 41 The sliding tool 81 (81c) temporarily fixed is externally fitted to the support member 31 while sliding in order from the open end (the other end 39) side of the support member 31 in the longitudinal direction. Then, even the slide tool 81 temporarily fixed to the leg member 41 can be easily fitted on the support member 31 while passing the leg member 41 through the gap 33. At this time, the arrangement interval distance of each slide tool 81 is provisionally set so as to substantially correspond to the position where the leg members 41 and 41 become the scaffolding of the floor slab S (the position where the load applied when pulling out can be supported). It is desirable to leave.

  Next, as shown in FIG. 1, the leg members 41, 41 are erected on the floor slab S. At that time, the slide members 81 and 81 are appropriately slid on the support member 31 as necessary to ensure that the leg members 41 and 41 are installed at positions where the leg members 41 and 41 are used as scaffolds. To decide. And the leg length is adjusted by changing suitably the screwing position with respect to the leg member 41 of the nuts 43 and 43 so that the support member 31 may become horizontal. In addition, the distance between the nuts 43, 43 is reduced against the elasticity of the slide tool 81, and each slide tool 81 is fixed to the support member 31.

  Next, as the shaft member 51 is inserted into the drainage stack 11, it is supported by being suspended by the support member 31, the pulling piece member 61 is held at the lower end portion, and between the drainage stack 11 and the support member 31. A detent bar 91 is fixed to the shaft member 51. This completes the assembly and installation of the extraction jig 21. As an example of a specific work procedure, first, the shaft member 51 is inserted from above through the through holes 83 and 83 of the slide tool 81 (81b, see FIG. 4) slidably attached to the support member 31, and then annular. The rotation stopper bar 91 is temporarily positioned with respect to the shaft member 51 through the member 95 through the annular member 95. Then, as shown in FIG. 1, the slide tool 81 is slid as necessary so as to be coaxial with the drainage stack 11 and then inserted into the drainage stack 11. In this state, the pull-out piece member 61 is attached to the lower end of the shaft member 51 with the nut 57, and the slide member 81 is prevented from coming off with the nut 53 screwed onto the upper portion. At that time, preferably, the screwing position of the nut 53 is adjusted so that the drawing piece member 61 is in contact with or close to the lower end surface 11 a of the drainage stack 11. Then, the detent bar 91 that is temporarily positioned is positioned and fixed immediately above the drainage stack 11. In this case, the displaceable distance in the drawing direction of the shaft member 51 (the drawing piece member 61) can be maximized. However, as shown in FIG. 1, this is not the case when there is an obstacle such as a step in the floor slab S and the detent bar 91 cannot be positioned immediately above the drainage stack 11. This is because, in the drawing work process, the displaceable distance of the shaft member 51 (the drawing piece member 61) can be extended by fixing the rotation stop bar 91 at a position close to the drainage stack 11 as necessary. When the rotation stop bar 91 is temporarily positioned on the shaft member 51, the bolts 99a and 99b (see FIG. 6A) are tightened tightly on the annular member 95, and only the rotation stop bar 91 is loosely tightened. Is preferred. In this case, when the detent bar 91 is fixed at an appropriate position later, the notch 91k portion of the detent bar 91 is used as a grip, and the detent bar 91 is fastened to the annular member without using a tool. Can be fixed easily.

  Next, when pulling out the drainage stack 11, the nut 53 is rotated by a ratchet wrench T or the like, and the shaft member 51 is guided upward. Accordingly, the extraction piece member 61 is also displaced upward together with the shaft member 51. Since the support part 65 of the extraction piece member 61 is larger in diameter than the inner diameter of the drainage stack 11, the stepped portion 65 a interferes with the lower end surface 11 a of the drainage stack 11 and is displaced upward while supporting the drainage stack 11. . As a result, the drainage stack 11 is pulled off from the backfill material (mortar Mr). Here, since the outer diameter of the support portion 65 of the extraction piece member 61 is smaller than the outer diameter of the drainage stack 11, the drainage stack 11 is pulled out without interfering with the backfill material. Therefore, the drainage stack 11 can be pulled out from the floor slab S without destroying the floor slab S as shown in FIG. Further, since the through-hole TH formed by using the drainage stack 11 as a mold remains in the floor slab S, a new drainage stack is inserted into the through-hole TH so as to fill the pipe for renewal. The amount of return material used can be reduced.

Such a pulling jig 21 has the following operational effects.
First, the fixing position of the leg members 41 and 41 with respect to the support member 31 can be changed, and the arrangement interval distance of the leg members 41 and 41 can be appropriately changed according to the width of the scaffold. In addition, the two leg members 41 and 41 can each be adjusted steplessly and can be installed in a place with a step. Furthermore, the shaft member 51 can easily change the support position by the support member 31 by sliding the slide tool 81 between the leg members 41 and 41. Thereby, even if there are restrictions on the work space and the scaffolding, the flexibility can be exhibited and the drawing can be performed.

  As described above, the extraction jig 21 of the present embodiment has been described in detail with respect to the usage mode of extracting the drainage stack 11 buried in the floor slab S. As shown in FIG. It can also be used to pull out the piping member 12 disposed through the wall W. At that time, the extraction jig 21 can be positioned on the surface of the wall W by the leg members 41 being pressed against the wall W by the reaction force of the extraction force.

  The objects to be extracted by the extraction jig 21 are, for example, various piping members embedded in a floor slab S or a wall W of a building constituting a drainage facility, a water supply facility, a hot water supply facility, a gas supply facility, or the like. . Not only pipes of various facilities but also pipe joints and connection sockets can be pulled out. In addition, piping members that do not protrude in the pulling direction from the floor surface or wall surface, such as trapezoidal drain traps, can also be pulled out.

In addition, the extraction jig | tool 21 of the said embodiment can consider various modifications.
For example, as shown in FIG. 6B, the fixing structure 93 of the rotation stopper bar 91 to the shaft member 51 is an annular shape in which a missing portion 96d through which the shaft member 51 can pass is provided in a part of the ring shape. The member 96 can be used (Modification 1). In this case, the rotation stopper bar 91 can be fixed by arranging the shaft member 51 inside the annular member 96 through the missing portion 96d. Therefore, in the assembly / installation operation of the extraction jig 21, even after the shaft member 51 is inserted into the drainage stack 11 and is supported by the support member 31, the rotation prevention bar is not attached to the shaft member 51. 91 can be fixed.

  As another specific modification example regarding the structure for fixing the rotation stopper bar to the shaft member 51, Modification Example 2 shown in FIGS. As shown in FIG. 8, in the fixing structure 103 of the second modification example, the fitting portion 105 is integrally formed at one end of the rod-shaped detent bar 101, and the fitting portion 105 is fitted to the outer periphery of the shaft member 51. As a result, the detent bar 101 is fixed to the shaft member 51. The shaft member 51 is provided with a plurality of fitted portions 111 for fitting the fitting portions 105 of the detent bar 101 with an interval in the axial direction. As shown in FIGS. 9A to 9C, the fitted portion 111 lacks the arc-shaped peripheral surface of the shaft member 51 and is parallel to each other and parallel to the axis of the shaft member 51. Portions 113 and 113 are formed. As shown in FIG. 9C, the fitting portion 105 provided at one end of the detent bar 101 is bifurcated and extends in parallel, and has flat portions 107 and 107 facing each other. In the fixing structure 103 of the modification example 2, the flat portions 107 and 107 of the rotation stopper bar 101 are fitted to the outer sides of the flat portions 113 and 113 of the shaft member 51, and the rotation prevention bar 101 is fixed to the shaft member 51. According to such a fixing structure 103, since the fitting part 105 of the detent bar is fitted to the flat portions 113, 113 formed on the peripheral surface of the shaft member 51, the detent bar 101 is located with respect to the shaft member 51. Therefore, relative rotation is difficult. Therefore, the rotation of the shaft member 51 can be more reliably prevented by the rotation stop bar 101 coming into contact with a fixed object such as the leg member 41 (see FIG. 8). Further, as shown in FIG. 9C, the fitting portion 105 of the detent bar 101 is formed such that the flat portions 107 extend in parallel, and is relative to the shaft member 51 from the outside in the radial direction. It is made to move and to be fitted to the fitted portion 111. Therefore, for example, as shown in FIG. 8, the shaft member 51 is attached to the shaft member 51 at an appropriate timing after the shaft member 51 is inserted into the drainage stack 11 and is supported by the support member 31. The detent bar 101 can be fixed. Moreover, it can also fix again to the to-be-fitted part 111 of a different axial direction position suitably.

  In an actual work site, it is difficult to cut the cut surface (lower end surface) 11a so as to be strictly orthogonal to the tube axis when cutting the drainage stack 11 at the time of drawing. Therefore, as a third modification, FIG. 10 illustrates an embodiment that is effective when the cut surface (lower end surface 11a) is inclined. In the third modification, the through-hole 163 of the extraction piece member 161 is formed with a space with respect to the outer diameter of the shaft member 51, and the axis of the extraction piece member 161 is allowed to shift with respect to the shaft member 51. It has become so. FIG. 10A shows an example in which the through-hole 163 is formed so as to increase in diameter toward the proximal direction in the drawing direction, but a through-hole whose diameter does not change throughout the axial direction may be used. A washer 59 made of an elastic body is interposed between the nut 57 for preventing the pulling piece member 161 from coming off from the shaft member 51 and the pulling piece member 161. Accordingly, when the pulling piece member 161 is pushed in the pulling direction, the pulling piece member 161 is inclined by compressing the washer 59 made of an elastic body, as shown in FIG. The entire circumference of the cut surface (lower end surface 11a) is supported. At this time, the bias of the load on the nut 57 that prevents the pull-out piece member 161 from being removed is alleviated (absorbed) by the washer 165 made of an elastic body. Therefore, even if the extraction piece member 161 is inclined, the pulling piece member 161 can be efficiently applied with a propulsive force in the extraction direction.

  As shown in FIG. 10B, when the cut surface (lower end surface 11 a) of the drainage stack 11 is inclined, the end 161 a on the proximal side in the pulling direction of the pulling piece member 161 is In some cases, the outer diameter extends beyond the outer diameter. In this case, the extraction piece member 161 interferes with the backfill material (mortar Mr illustrated in FIG. 1 and the like), and the extraction resistance increases. As an embodiment effective for eliminating such inconvenience, there is a third modification shown in FIG. 11A, the outer diameter of the step portion 165a formed between the positioning portion 167 and the support portion 165 of the extraction piece member 161 is larger than the inner diameter of the drainage stack 11 as shown in FIG. The outer shape of the support portion 165 is tapered so that the diameter of the support portion 165 is reduced toward the proximal end in the drawing direction. In this case, as shown in FIG. 11B, the pulling piece member 161 does not protrude from the extended line of the outer diameter of the drainage stack 11 even if it is inclined. Therefore, the drainage stack 11 can be pulled out smoothly without the drawing piece member 161 interfering with the backfilling material.

  Further, the shape of the support member 31 is not limited as long as the support member 31 can support the arrangement distance interval of the leg members 41 and 41 so as to be changeable. Furthermore, if the support position of the shaft member can be changed between the leg members 41, 41, it is preferable because flexibility can be exhibited with respect to the restriction of the installation space. For example, the support member 31 may have an annular shape in which both ends in the longitudinal direction of the plate-like portions 35 and 35 are connected. In this case, the arrangement distance interval between the leg members 41 and 41 can be supported in a stepless manner, and the support position of the shaft member 51 can be changed in a stepless manner. The U-shape as in the above embodiment is further preferred in that the leg member 41 and the shaft member 51 can be easily inserted into the support member 31 from the open end (the other end 39).

  In the above embodiment, the pulling piece member 61 is displaced together with the shaft member 51 in the drawing direction by the propulsion mechanism 71. However, for example, the drawing piece member is screwed to the shaft member, and the shaft member is moved on the spot. It is good also as a structure which guides only the extraction | drawer piece member in the extraction direction by rotating around an axis | shaft. Such a configuration is exemplified in Patent Document 1 described above. When the drawing piece member is displaced together with the shaft member in the drawing direction, the drawing piece member is unlikely to fall off the shaft member. On the other hand, a configuration in which only the extraction piece member is displaced in the extraction direction without displacement of the shaft member is effective when, for example, the space in the extraction direction is limited and the shaft member cannot be sufficiently displaced in the extraction direction. is there.

11 Drainage standpipe (pipe member)
11a Lower end surface 12 Piping member 21 Extraction jig 31 Support member 41 Leg member 51 Shaft member 53 Nut 55 Thrust bearing 61 Extraction piece member 71 Propulsion mechanism 81 Slide tool 91 Detent bar S Floor slab W Wall

Claims (3)

A drawing piece member disposed on the proximal side in the drawing direction of a piping member embedded through a floor slab or wall of a building, a shaft member that passes through the piping member and supports the drawing piece member, and the shaft A support member that supports the member at a position spaced from the floor slab or wall in the pulling direction of the piping member; and the shaft member between the supporting member in the pulling direction of the piping member from the floor slab or wall. A pair of leg members that are held at spaced positions; and a propulsion mechanism that propels the pulling piece along the axis of the shaft member in the pulling direction. A pipe member pulling jig that pushes the piping member in the pulling direction by supporting it with a piece member and propelling it in the pulling direction by the propulsion mechanism and pulling it from the floor slab or wall. I,
A pipe member pulling jig, wherein an arrangement interval distance between the pair of leg members is changeable with respect to the support member. The piping member pulling jig according to claim 1,
The pipe member pulling jig, wherein the shaft member is disposed between the pair of leg members so that a support position by the support member can be changed. A pipe member extraction jig according to claim 1 or 2,
The piping member drawing jig, wherein each of the pair of leg members is arranged so that a leg length with respect to the support member can be individually adjusted.

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