JP3571592B2 - Buried pipe drawing device and drawing method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a drawing apparatus and a drawing method used for pulling and removing a buried pipe that is laid as a gas pipe or a water pipe and that is unnecessary and left unused after use, or for removing an existing pipe in a renewal method.
[0002]
[Prior art]
With regard to buried pipes such as gas pipes and water pipes, buried pipes that are no longer needed due to rebuilding of houses, etc., will cause various adverse effects if left unattended. In addition, it is specified that a filling material such as mortar is injected and filled into the hollow hole of the removal site so as not to cause land subsidence or the like. When removing unnecessary pipes, existing pipes must be removed before new pipes are laid by the renewal method.
[0003]
As this kind of drawing device, there is a device described in the above-mentioned JP-A-3-9188.
Generally, this kind of drawing apparatus including the one disclosed in the above publication includes a clamping means for gripping a removal pipe to be withdrawn, a hydraulic cylinder means for applying a gripping force to the clamping means, and a traction means for applying a pulling force to the clamping means. Hydraulic cylinder means.
[0004]
Here, a device and a method used for extracting the unnecessary buried pipe will be described as follows.
In FIG. 6, reference numeral 11 denotes a shaft for pulling out the unnecessary buried pipe 12.
Inside the shaft 11, a vise 13 having a reaction force receiving base 13A on its bottom surface is installed.
The vice 13 is provided with a lever lock 14 of a hydraulic jack structure, which is a driving member for pulling the unnecessary buried pipe 12 in the pulling direction, and is unnecessary by swinging a handle 14A provided on the lever lock 14. The chain 15 hooked between the buried pipe 12 is wound up, and the unnecessary buried pipe 2 is pulled.
The unneeded buried pipe 12 that is pulled and pulled out has a predetermined length exposed in the pier 11 cut off, and the chain 5 is again hooked on the end of the unneeded buried pipe 12 located underground. By repeating the above operation, the entire length of the buried section is extracted.
[0005]
Here, a device and a method used for extracting the unnecessary buried pipe will be described as follows. In FIG. 6, reference numeral 11 denotes a shaft for pulling out the unnecessary buried pipe 12. Inside the shaft 11, a vise 13 having a reaction force receiving base 13A on its bottom surface is installed. The vice 13 is provided with a lever lock 14 of a hydraulic jack structure, which is a driving member for pulling the unnecessary buried pipe 12 in the pulling direction, and is unnecessary by swinging a handle 14A provided on the lever lock 14. The chain 15 hooked between the buried pipe 12 is wound up, and the unnecessary buried pipe 2 is pulled. The unnecessary buried pipe 12 that is towed and pulled out has a predetermined length exposed in the pier 11 cut off, and the chain 15 is again hooked to the end of the unnecessary buried pipe 12 located underground. By repeating the above operation, the entire length of the buried section is extracted.
[0006]
[Problems to be solved by the invention]
However, the drawer having the above configuration has the following problems. According to the apparatus and the construction method shown in FIG. 6, since the lever lock 14 is installed corresponding to the buried position of the unnecessary buried pipe 12 to be pulled out, the pier 1 is excavated in a road section or a private area. become. However, the pier 11 becomes a considerably large pit in order to secure a handle operation area for the reaction force receiving base 13 and the lever lock 14 in the space including the bottom thereof. For this reason, the equipment and time required for the excavation work are lengthened, and the work cost is increased. In addition, when the excavated area is large, it is not possible to secure a necessary excavated area when another buried object is located near the excavated place. As a result, there is a possibility that the installation of the buried pipe extraction device cannot be performed. Moreover, since the reaction force receiving base 3 and the lever lock 14 are relatively large, it is not easy to carry them in and out of the shaft 1, and the labor burden on the worker increases.
[0007]
In particular, the step of pulling out the unnecessary buried pipe, the step of cutting the drawn unnecessary buried pipe at predetermined lengths, and the preparation for pulling out the end of the unnecessary buried pipe again after cutting, that is, hooking the chain 15 It is necessary to repeat the stopping step over the length of the unnecessary buried pipe, which increases the labor burden on the operator, increases the number of work steps and work time, and tends to increase the work cost.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a buried pipe pulling device having a configuration capable of reducing the labor burden and the number of man-hours in the pulling operation and reducing the cost of the pulling operation in view of the problems in the conventional unnecessary buried pipe removing device. Is to provide.
[0009]
[Means for Solving the Problems]
In order to achieve this object, the invention according to claim 1 is a buried pipe extracting device for extracting and removing unnecessary pipes buried underground, wherein the extracting apparatus exposes the unnecessary pipes. A holding plate mounted on a reaction force plate installed on the inner wall of the standing member, for moving the tube in the drawing direction while holding the buried unnecessary tube, and the holding unit has a shearing blade in a drawing direction side from a holding portion thereof. Characterized in that it is provided.
According to a second aspect of the present invention, the reaction force plate is provided with a cylinder member that can reciprocate along a pulling direction of the buried unnecessary pipe, and the cylinder member is movable in a radial direction of the buried unnecessary pipe. The above-mentioned holding means is provided .
[0011]
According to a third aspect of the present invention, the holding means is capable of mounting a part of the peripheral surface of the burial unnecessary tube on the receiving surface, and movable in a direction of crushing the burial unnecessary tube facing the receiving surface. And a sliding member,
The receiving surface is constituted by a stepped portion, and a wall of the stepped portion and a part of the sliding member facing the stepped portion constitute a shearing blade.
[0012]
The invention according to claim 5 is characterized in that the receiving surface and the sliding member facing the receiving surface are constituted by parallel inclined surfaces.
[0013]
The invention according to claim 4 is characterized in that the receiving surface is provided with a non-slip for the buried unnecessary pipe.
[0014]
The invention according to claim 6 is characterized in that the sliding member is driven by a hydraulic cylinder in a direction of crushing the buried unnecessary pipe. The invention according to claim 7 is a method for extracting a buried pipe by extracting an unnecessary pipe buried underground and removing the unnecessary pipe, wherein a reaction force plate is provided on a vertical inner wall for exposing the unnecessary pipe. In the process of pinching the buried unnecessary pipe drawn into the shaft, when the buried unnecessary pipe is moved in the drawing direction while pinching the buried unnecessary pipe by the pulling device provided on the reaction force plate, A step of cutting the unnecessary burial pipe on the drawing direction side of the holding portion, and a step of newly pulling the unnecessary burial pipe into the shaft while holding the unnecessary burial pipe in the step. It is characterized by:
[0015]
[Action]
According to the first or seventh aspect of the present invention, at the stage where the buried unnecessary pipe drawn into the stand is clamped, the side in the drawing direction from the clamped portion is cut by the cutting blade provided on the clamping means. become. In other words, in the process of pinching the buried unnecessary pipe drawn into the shaft, the shearing force accompanying the pinching makes it possible to cut the buried unnecessary pipe in the drawing direction side from the pinched portion, and thereafter, the unnecessary buried unnecessary pipe is cut. It is possible to newly pull out the shaft while holding the tube. Thereby, the drawing and the cutting of the buried unnecessary pipe can be performed at the same time, and it is not necessary to perform the cutting work of the drawn buried unnecessary pipe again.
[0016]
According to the second and third aspects of the present invention, since a part of the holding means and the sliding portion facing the holding means are configured as a step portion and a shearing blade, the burying unnecessary pipe placed on the step portion is removed by the step portion. The wall can be pushed and cut off by the wall and the shearing blade, and the unnecessary pipe can be cut in the clamping process. In addition, since other than the cut surface is left on the receiving surface, the next drawing can be continued as it is.
[0017]
According to the fourth aspect of the present invention, since the receiving surface is provided with the non-slip, it is possible to prevent the unnecessary displacement of the burying unnecessary pipe when being pinched and cut, and to effectively apply the shearing force.
[0018]
According to the fifth aspect of the invention, since the receiving surface and the facing surface of the sliding member are inclined surfaces, the shearing blade located on the sliding member side has the same cutting clearance angle as that of the shearing blade. The cutting force can be efficiently concentrated to easily cut the buried unnecessary pipe.
[0019]
According to the sixth aspect of the present invention, it is possible to perform the cutting operation of the burial unnecessary pipe by a simple operation of reciprocating movement of the sliding member.
[0020]
【Example】
Hereinafter, the present invention will be described in detail with reference to illustrated embodiments.
FIG. 1 is a schematic plan view illustrating a main part of an apparatus for extracting a buried pipe according to an embodiment of the present invention. In FIG. It is installed in the formed shaft 3.
A flat reaction force receiving plate 4 is fixed to the wall of the shaft 3, and a jack device 5 is integrally attached to the reaction force receiving plate 4.
[0021]
The reaction force receiving plates 4 are arranged in a pair with the embedding unnecessary tube 2 interposed therebetween, and the base of a hydraulic cylinder forming the jack device 5 is fixed to the pair of reaction force receiving plates 4.
A pinching means 6 is attached to the tip of the rod 5A of the jack device 5 so as to straddle these rods.
[0022]
As shown in FIG. 2, the holding means 6 is integrated with a tip of a rod 5A of a hydraulic cylinder constituting the jack device 5, and has a receiving surface portion 6A on which the embedding unnecessary tube 2 can be placed, and a receiving surface portion 6A embedded in the receiving surface portion 6A. A sliding member 6B movable in a direction to crush the unnecessary pipe 2;
The receiving surface portion 6A has a receiving surface 6A1 on which the burying unnecessary tube 2 is placed formed by a step portion, and the sliding member 6B can enter the step portion.
The sliding member 6B is inserted into a guide rod 7 standing upright on the upper surface of the receiving surface portion 6A, and is directed toward the receiving surface 6A1 by a hydraulic cylinder 9 attached to a support member 8 fixed to the upper end of the guide rod 7. You can move.
[0023]
FIG. 3 is a view showing a facing state of the receiving surface portion 6A and the receiving surface portion 6B. In FIG. 3A, a vertical wall portion 6A2 forming a step of the receiving surface 6A1 in the receiving surface portion 6A, and a sliding member 6B are shown. Is formed as a shearing blade, that is, a blade that can push off the buried unnecessary pipe 2. For this reason, when the sliding member 6B moves toward the receiving surface 6A1 and falls into the step of the receiving surface portion 6A, as shown in FIG. 3B, the bottom of the receiving surface 6A1 and the sliding member 6B opposed thereto come to close. While the burying unnecessary pipe 2 is squeezed and pinched by the lower surface of the vertical wall 6A2, the vertical wall 6A2 forming the step of the receiving surface 6A1 and the surface of the sliding member 6B opposed thereto can move while slidably contacting. The unnecessary pipe 2 is pushed off.
[0024]
Since the present embodiment is configured as described above, when the buried unnecessary pipe 2 is drawn, the shaft 3 is formed in advance at a position where the end of the buried unnecessary pipe 2 is exposed, and the shaft 3 is formed on the wall of the shaft 3. The jack device 4 is installed via the reaction force receiving plate 4.
A receiving portion 6A of the holding means 6 is attached to the tip of the rod 4A of the jack device 4, and a sliding member 6B is slidably provided on the receiving portion 6A via a guide rod 7 and a supporting member. The sliding member 6 </ b> B is connected to the hydraulic cylinder 9 via 8.
[0025]
In a state where the sliding member 6B is separated from the receiving surface 6A1 of the receiving portion 6A of the sliding member 6 (see FIG. 3A), the position of the buried unnecessary pipe 2 is between the receiving surface portion 6A and the sliding member 6B. In this state, the hydraulic cylinder 9 is operated and the sliding member 6 is moved toward the receiving surface 6A.
When the sliding member 6B moves toward the receiving surface portion 6A, the unnecessary-buried pipe 2 is crushed, and at the same time, the vertical wall portion 6A2 of the receiving surface 6A1 and the surface of the sliding member 6B opposed to the receiving surface 6A1 are buried. Is sheared and pushed off (see FIG. 3B). The depth of the step in the receiving surface 6A1 is set to a depth at which a part of the burial unnecessary tube 2 can be cut, in other words, a depth at which a cut portion of the burial unnecessary tube 2 can be divided from another portion when the cut portion is pushed off. Is set.
[0026]
On the other hand, when the burying unnecessary pipe 2 is completely crushed, the receiving surface 6A is sandwiched by the pressure from the sliding member 6B while the end of the burying unnecessary pipe 2 to be subsequently pulled out is placed. By moving the jack device 4, it is possible to turn the target portion of the new buried unnecessary pipe.
[0027]
According to the embodiment as described above, the sliding member 6B is moved toward the receiving surface 6A1 of the receiving surface portion 6A, and the sliding member 6B is sandwiched only to cut a part of the unnecessary-buried tube 2 so that the new unnecessary-buried tube 2 is newly formed. Since the posture for turning to the buried pipe 2 is set, the work of grasping and changing the end of the buried unnecessary pipe 2 is not required.
[0028]
Next, a modification of the above embodiment will be described with reference to FIG.
The embodiment shown in FIG. 4 is characterized by the structure of the receiving surface 6A1 in the receiving surface portion 6A and the sliding member 6B opposed thereto.
That is, the receiving surface 6A1 of the receiving surface portion 6A and the surface of the sliding member 6B facing the receiving surface portion 6A are formed in such a slope that the receiving surface 6A1 and the vertical wall portion 6A2 side are located on the lower side in parallel with each other.
By providing a gradient also on the sliding member 6B side, it is the same as providing a cutting clearance angle on the shearing blade located on the sliding member 6B side, and the cutting force is efficiently concentrated on the shearing blade, so that it is not necessary to easily bury the blade. The tube 2 can be cut.
[0029]
Since the present embodiment is configured as described above, when a part of the burial unnecessary tube 2 is placed on the receiving surface 6A1 in a state where the tube 2 faces the receiving surface portion 6A and the sliding member 6B of the holding means 6, sliding occurs. The member 6B can move toward the receiving surface 6A1 (see FIG. 4A).
As shown in FIG. 4B, when the sliding member 6B moves and enters the step of the receiving surface 6A1, a part of the buried unnecessary pipe 2 is crushed toward the inclined surface, as in the above-described embodiment. In the process of being pinched while being further crushed, it is pushed off by a shearing blade constituted by the vertical wall portion 6A2 of the receiving surface 6A1 and the opposing surface of the sliding member 6B. At the time of push-cutting, the sliding member 6B, which forms one of the shearing blades, is formed of a sloped surface and has a so-called acute-angled blade shape. be able to.
The buried unnecessary pipe 2 which has been partially cut off and cut is sandwiched on a slope, and the cut surface of the buried unnecessary pipe 2 is set to the lower side. The state in which the burying unnecessary pipe 2 is hard to be pulled out during the pulling operation is maintained.
[0030]
In such an embodiment, the cut end portion side can be clamped in a state close to a direction perpendicular to the drawing direction by using the slope surface, so that it is possible to suppress the end portion from becoming slippery in the pulling and holding. it can.
In the above-described embodiment, the slope surface is used as the retaining structure for pulling out and holding the buried unnecessary pipe 2. However, the present invention is not limited to the above-described configuration. For example, as shown in FIG. It is also possible to form a triangular blade or saw blade-shaped non-slip portion on the receiving surface 6A1. Such a non-slip portion may be provided not only on the receiving surface having the inclined surface shown in FIG. 4 but also on the receiving surface 6A1 formed in a horizontal plane shown in FIG. .
[0031]
When the holding means 6 has a configuration in which the receiving surface portion 6A1 and the sliding member 6B opposed thereto are provided with a sloped surface, as shown in FIG. 5, the tip of the sliding member has a wedge-shaped cross section. It is also possible to form so that it becomes. In the case of this configuration, the step has the same function by the projection of the wedge instead of the step.
[0032]
【The invention's effect】
According to the first and seventh aspects of the present invention , the extraction and the cutting of the buried unnecessary pipe can be performed at the same time, and it is not necessary to perform the cutting work of the drawn buried unnecessary pipe again. As a result, it is possible to reduce the labor burden and the number of man-hours at the time of the pulling-out work, and to reduce the cost of the pulling-out work.
[0033]
According to the second and third aspects of the present invention, since the shearing blade is provided on a part of the holding surface of the holding means, the operation of holding the buried unnecessary pipe without using a special cutting tool or the like is used. It is possible to cut by burial unnecessary pipe shearing. In addition, since the new state of the clamped state can be maintained, a new drawing operation can be continued, eliminating the need for the procedure of re-gripping the pipe after cutting the unnecessary buried pipe, and reducing the cost by simplifying the work procedure. Becomes possible.
[0034]
According to the fourth aspect of the present invention, since the receiving surface and the facing surface of the sliding member are inclined surfaces, the shearing blade located on the sliding member side has the same cutting clearance angle as the shearing blade. The cutting force can be efficiently concentrated on the blade, and the unnecessary pipe can be easily cut.
[0035]
According to the fifth aspect of the present invention, since the non-slip is provided on the receiving surface, it is possible to prevent the unnecessary displacement of the buried unnecessary pipe when it is pinched and cut, and to effectively apply the shearing force. .
[0036]
According to the sixth aspect of the present invention, it is possible to perform the cutting operation of the burial unnecessary pipe by a simple operation of reciprocating movement of the sliding member.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a work site where a buried pipe pulling device according to an embodiment of the present invention is used.
FIG. 2 is a perspective view illustrating a configuration of a main part of the drawing device illustrated in FIG. 1;
3A and 3B are local cross-sectional views of main parts of the drawing device shown in FIG. 2, wherein FIG. 3A shows a state before clamping and FIG. 3B shows a clamping state.
4A and 4B are local cross-sectional views for explaining a modification of a main part in the drawing device shown in FIG. 2, in which FIG. 4A shows a state before clamping and FIG. .
FIG. 5 is a partial cross-sectional view for explaining another modification of the main part of the drawing device shown in FIG. 2;
FIG. 6 is a schematic diagram for explaining an example of a conventional buried pipe drawing method.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 drawing device 2 burial unnecessary pipe 3 shaft 4 reaction plate 5 hydraulic cylinder 6 forming jack device 6 holding means 6A receiving surface 6A1 receiving surface 6A2 wall 6B at step of receiving surface 6 sliding member 9 hydraulic cylinder

Claims (7)

A buried pipe withdrawal device for extracting and removing unnecessary pipes buried underground, wherein the withdrawal device is mounted on a reaction force plate installed on a vertical wall for exposing the buried unnecessary pipes, A buried pipe extracting device, comprising: a clamping means for moving a buried unnecessary pipe in a drawing direction while clamping the buried pipe, wherein the clamping means is provided with a shearing blade on a side of the drawing direction from a clamping portion thereof . The reaction force plate is provided with a cylinder member that can reciprocate in a direction in which the burial unnecessary tube is pulled out, and the cylinder member is provided with the holding means that is movable in a radial direction of the burial unnecessary tube. buried pipe withdrawal device according to claim 1, characterized in that there. The holding means includes a receiving surface on which a part of the peripheral surface of the burial unnecessary tube can be placed, and a sliding member movable in a direction of crushing the burial unnecessary tube facing the receiving surface. The buried pipe according to claim 1 or 2, wherein the receiving surface is formed by a step, and a wall of the step and a part of the sliding member facing the step form a shearing blade. Drawing device. 4. The apparatus according to claim 3, wherein the receiving surface and the sliding member facing the receiving surface are formed by parallel inclined surfaces. 4. The buried pipe drawing device according to claim 3, wherein the receiving surface is provided with a non-slip for the buried unnecessary pipe. 6. The apparatus according to claim 1, wherein the sliding member is driven by a hydraulic cylinder in a direction in which the unnecessary pipe is crushed. A buried pipe pulling method for pulling out and removing unnecessary pipes buried in the ground, comprising installing a reaction plate on a vertical inner wall for exposing the unnecessary pipes, and pulling out the reaction plate. By means of the device, when the buried unnecessary pipe is moved in the drawing direction while being pinched, in the process of pinching the buried unnecessary pipe drawn into the shaft, due to the shearing force accompanying the pinching, on the drawing direction side from the pinched portion. A method for extracting a buried pipe, comprising: cutting the unnecessary buried pipe; and newly extracting the unnecessary buried pipe into the shaft while holding the unnecessary buried pipe in the step.

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