JP2011179833A - Device for deection of buried object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buried object detection device, capable of reducing worker's labor and reliably preventing damage to a buried object. <P>SOLUTION: The device 100 for detecting the buried object 198 buried underground includes: a long outer pipe 122 inserted into the ground; an inner pipe 124 inserted into the outer pipe; a pump 102 for pumping water to one of the outer and inner pipes; a compressor 104 pressure-feeding air to the other of the outer and inner pipes; and an injection unit 140 provided at a low end of the outer pipe to mix the pumped water with air as a jet water flow 194 and to inject the jet water flow into the ground for excavation. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a buried object exploration device for exploring a buried object buried in the ground.

  In recent years, underground wiring has been popularized from the viewpoint of landscape and safety in cities. In underground wiring, piping is buried in the ground, and power cables, communication cables, and the like are inserted into the piping. When excavation work is performed at a site where such buried pipes (hereinafter referred to as buried objects) exist, an underground exploration is conducted in advance so that the buried objects are not damaged by contact with the excavator. It is necessary to grasp the arrangement in advance.

  In the conventional exploration of buried objects, an exploration rod made of a rigid material such as steel is pierced into the ground, and it is determined whether or not the buried object is present by the presence or absence of contact with the tip of the exploration rod. However, with such a method, when the exploration rod is pierced into the ground, the exploration rod and the buried object may come into contact with each other and the buried object may be damaged. In particular, as the exploration rod is inserted deep into the ground, a pressure bulb, which is a solid soil mass, is formed in the vicinity of the tip due to the pressure from the exploration rod. Then, in order to pierce the probe rod deeper, it is necessary to penetrate the pressure bulb, and the probe rod is pierced with a stronger force. Therefore, there is a higher possibility that the buried object will be damaged when it comes into contact with the exploration rod.

  Therefore, Patent Document 1 discloses an exploration rod in which a jet nozzle is provided at one end of a hollow steel pipe and a hose connecting member for connecting a water supply hose to the hollow steel pipe is provided at the other end. According to this, when high-pressure water is passed through the hollow steel pipe, water is ejected vigorously from the injection nozzle, so that the earth and sand at the tip of the exploration rod can be broken, and the insertion effort of the exploration rod can be reduced.

Japanese Utility Model Publication No. 7-8790

  As described above, in the exploration rod of Patent Document 1, high-pressure water is injected from the injection nozzle, so that even when a pressure bulb is formed in the ground, the pressure bulb can be softened by the high-pressure water. There is. However, after all, in order to pierce the exploration rod of Patent Literature 1 into the ground, it is the same as the conventional exploration in that it must be struck. Therefore, Patent Document 1 describes a weight member for driving the exploration rod. If driven in this way, damage to the buried object due to contact with the exploration rod cannot be completely prevented. Rather, if the surrounding earth and sand is loosened by high-pressure water, the possibility that the buried object will be damaged by hitting the probe is increased.

  In view of such a problem, an object of the present invention is to provide an embedded object exploration device that can reduce the labor of an operator and can reliably prevent damage to an embedded object.

  In order to solve the above-mentioned problem, a typical configuration of the buried object exploration device according to the present invention is a buried object exploration device for exploring a buried object buried in the ground, which is inserted into the ground. An outer tube, an inner tube inserted into the outer tube, a pump that pumps water to one of the outer tube or the inner tube, a compressor that pumps air to the outer tube or the other of the inner tube, and an outer tube And a jet section that mixes the pumped water and air to form a jet stream, and jets the jet stream into the ground for excavation.

  Jet water streams have a stronger momentum than mere high pressure water. Therefore, according to the said structure, a soil is removed in the injection part vicinity by a jet water flow, and a hole is formed in the ground. For this reason, it can be inserted to an arbitrary depth simply by pushing the buried object searching device gradually into the hole formed by the jet water flow. Therefore, since it is not necessary to apply the force and pierce the buried object exploration device into the ground, it is possible to reduce the labor of the operator and reliably prevent damage to the buried object. Moreover, since only the buried object exploration device is inserted without applying a force, a pressure bulb is not formed. Therefore, it is not necessary to spend a great deal of effort to penetrate the buried object exploration device through the pressure bulb.

  It is preferable to further include a connection outer tube that connects to and extends the outer tube, and a connection inner tube that connects to and extends the inner tube. According to such a configuration, even if the length of the outer pipe and the inner pipe is insufficient by inserting the buried object exploration device deep into the ground, the outer pipe and the inner pipe are connected by connecting the outer pipe and the inner pipe. The inner tube can be extended for further insertion or further exploration.

  The buried object searching device may further include a handle that is detachably attached to an upper end thereof. As a result, since the handle can be gripped and operated, workability can be improved. Further, by adopting a structure in which the handle is detachable, it can be removed when not needed or disassembled when being carried, and high convenience can be obtained.

  Said outer pipe | tube has a convex part in the upper end vicinity of an outer peripheral surface, and a handle | steering_wheel consists of the division member which pinches | interposes the outer peripheral surface of an outer pipe | tube, and it is good to have a recessed part fitted to a convex part on the inner surface. According to such a configuration, the handle is provided on the outer peripheral surface near the upper end of the outer tube. Therefore, even when a pump pipe or a compressor pipe is connected to the upper end surface of the outer pipe, a handle can be provided in the buried object search apparatus, and the same advantages as the above-described handle can be obtained. It becomes possible.

  The central part of the inner pipe and the injection part can be extracted from the outer pipe. After extracting the central part of the inner pipe and the injection part, a fiberscope is inserted into the outer pipe, and an image is taken from the lower end of the injection part. It should be possible to shoot. Thereby, it is possible to grasp the situation below the buried object search device in the underground using a fiberscope. In addition, since the inner tube is pulled out and the fiberscope can be inserted into the outer tube, it is not necessary to increase the diameter of the inner tube and outer tube to obtain the width for inserting the fiberscope. There is no increase in the size of the apparatus.

  It is preferable that water can flow out from the lower end of the injection section through the outer tube and the fiberscope while photographing with the above-described fiberscope. According to such a configuration, muddy water (sediment) in front of the fiberscope can be removed, so that the field of view of the fiberscope can be made clear. In this case, the momentum to flow out of water is sufficient if mud is pushed away, and high-pressure water sufficient for excavation is unnecessary.

  According to the present invention, it is possible to provide a buried object search apparatus that can reduce the labor of an operator and can reliably prevent damage to a buried object.

It is a figure which shows the external appearance of the buried object search apparatus concerning this embodiment. It is a figure which shows the detail of a pipe part and a cover part. It is a figure which shows the detail of an injection part. It is a figure explaining extension of a pipe part. It is a figure explaining insertion of a fiberscope. It is a figure explaining a handle | steering-wheel and its mounting | wearing. It is a figure explaining the search of the buried object by a search device. It is a figure which shows the other example of a pipe part. It is a figure which shows the other example of a cover part and an injection part.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram illustrating an appearance of an embedded object searching device (hereinafter referred to as a searching device 100) according to the present embodiment. As shown in FIG. 1, the exploration device 100 mainly includes a pump 102, a compressor 104, and a main body 110. The pump 102 pumps water to the main body 110 (strictly speaking, one of an outer tube 122 and an inner tube 124 described later). The compressor 104 pumps air to the main body 110 (strictly speaking, the other of the outer tube 122 and the inner tube 124 described later). Then, the exploration device 100 injects a jet stream generated by mixing the water pumped from the pump 102 and the air pumped from the compressor 104 into the ground, and searches the buried object buried in the ground. To do.

  The main body 110 mainly includes a pipe part 120, a lid part 130, and an injection part 140. FIG. 2 is a diagram showing details of the pipe part 120 and the lid part 130. 2A is an external perspective view of the tube portion 120 and the lid portion 130 when disassembled, and FIG. 2B is an external perspective view when the tube portion 120 and the lid portion 130 are connected, and FIG. ) Is a partial cross-sectional view of FIG.

  The pipe portion 120 is a member that serves as a flow path for water and air, and includes a long outer tube 122 that is inserted into the ground and an inner tube 124 that is inserted into the outer tube 122. In the present embodiment, a pump coupling part 122 a is provided on the outer surface of the outer pipe 122, and the pump 102 is connected to the pump 102 to supply water pumped from the pump 102 into the outer pipe 122. On the other hand, air is supplied to the inner pipe 124 from the compressor 104 via a lid 130 described later.

  Also, female threads 122b are provided on the inner surfaces of the upper and lower ends of the outer tube 122, and female threads 124b are provided on the inner surfaces of the upper and lower ends of the inner tube 124 (the female thread 124b at the lower end of the inner tube 124 is Not shown). Thus, the main body 110 can be assembled by screwing the lid portion 130 on the upper ends of the outer tube 122 and the inner tube 124 and screwing the injection portion 140 on the lower ends thereof (see FIG. 1).

  In the present embodiment, water is circulated through the outer tube 122 and air is circulated through the inner tube 124. However, the present invention is not limited to this, and a reverse configuration may be used. Moreover, in the pipe part 120, although the outer tube | pipe 122 and the inner tube | pipe 124 were made into the different body, it is not limited also in this, These may be connected (connected) and may be comprised integrally.

  The lid part 130 is attached to the upper end of the pipe part 120 and closes the pipe part 120. The lid portion 130 is provided with a compressor connection portion 130a on the outer surface and a flow passage 130b on the inside. By connecting the compressor 104 to the compressor connection portion 130a, the pressure-fed air passes through the flow passage 130b. Supplied to the inner pipe 124.

  The lid portion 130 is provided with male screw portions 130c and 130d. The male screw portion 130c is screwed into the female screw portion 122b of the outer tube 122, and the male screw portion 130d is screwed into the female screw portion 124b of the inner tube 124. As a result, the lid portion 130 is screwed into the tube portion 120.

  Furthermore, in this embodiment, the handle 132 can be attached to and detached from the lid 130. Specifically, in this embodiment, a handle attachment hole 130e is provided, and the handle 132 can be attached to the lid 130 by attaching the end of the handle 132 thereto. With this configuration, it is possible to operate the exploration device 100 while holding the handle 132, so that it is possible to improve workability. Further, since the handle 132 is detachable, the handle 132 can be detached when not needed or transported, and high convenience can be obtained.

  In this embodiment, the compressor connection portion 130a and the handle attachment hole 130e are provided on the side surface of the lid portion 130. However, the present invention is not limited to this, and these may be provided on the upper surface of the lid portion 130. . Although not shown in the figure, a configuration may be adopted in which the handle 132 is mounted by providing a convex portion on the side surface of the lid portion 130, a concave portion in the handle 132, and inserting the convex portion into the concave portion instead of the handle attachment hole 130 e.

  The injection unit 140 is provided at the lower end of the outer tube 122, mixes the pumped water and air into a jet water flow, and jets the jet water flow into the ground. FIG. 3 is a diagram illustrating details of the injection unit 140. 3 (a) is an exploded perspective view of the injection unit 140, FIG. 3 (b) is a cross-sectional perspective view of FIG. 3 (a), and FIG. 3 (c) shows the outer tube injection unit 142 as the inner tube injection unit. It is a cross-sectional perspective view when inserted in 144.

  As shown in FIG. 3A, the injection unit 140 according to the present embodiment includes an outer tube injection unit 142 and an inner tube injection unit 144. The outer tube injection portion 142 has a male screw portion 142a that can be screwed into the female screw portion 122b of the outer tube 122 at the upper end thereof. The inner pipe injection unit 144 is a central part of the injection unit 140 and has a male screw part 144 a that can be screwed into the female screw part 124 b of the inner pipe 124 at the upper end thereof.

  When the inner pipe injection part 144 is inserted into the outer pipe injection part 142 in the direction of the arrow shown in FIG. 3B, the convex part 144b of the inner pipe injection part 144 is latched to the convex part 142b at the tip of the outer pipe injection part 142. Then, the injection unit 140 is assembled as shown in FIG. When the exploration device 100 is in operation, the water that has passed through the outer pipe 122 and has flowed into the outer pipe injection section 142 flows into the inner pipe injection section 144 from the communication hole 144 c of the inner pipe injection section 144. Then, the water that has flowed in is mixed with the air that has passed through the inner pipe 124 and has flowed into the inner pipe injection section 144 to form a jet water flow, and is jetted from the ejection hole 144e at the tip of the inner pipe injection section 144.

  As described above, the main body 110 is assembled using the screw portions of the respective members. However, in this embodiment, the length of the tube portion 120 can be further extended using these screw portions.

  FIG. 4 is a diagram for explaining the extension of the pipe part 120. 4A is a diagram showing the connection outer tube 152 and the connection inner tube 154, and FIG. 4B is a diagram showing a state after the connection outer tube 152 and the connection inner tube 154 are connected.

  Specifically, the exploration device 100 further includes a connection outer tube 152 and a connection inner tube 154. The connecting outer tube 152 has substantially the same diameter as the outer tube 122, and has a male screw portion 152a at one end and a female screw portion 152b at the other end. Thereby, the external thread 122 can be extended by screwing the male thread 152a with the female thread 122b (see FIG. 2) of the external tube 122 and connecting them. The connecting inner tube 154 has substantially the same diameter as the inner tube 124, and has a male screw portion 154a at one end and a female screw portion 154b at the other end. As a result, the male screw portion 154a can be screwed into the female screw portion 124b (see FIG. 2) of the inner tube 124 to connect them, and the inner tube 124 can be extended.

  And if the pipe part 120 is extended using the connection outer tube | pipe 152 and the connection inner pipe | tube 154 as mentioned above, as shown in FIG.4 (b), the female screw part 152b of the connection outer tube | pipe 152 and the connection inner tube | pipe 154 of FIG. The male screw part 142a of the outer pipe injection part 142 and the male screw part 144a of the inner pipe injection part 144 are screwed into the female screw part 154b. Thereby, it is possible to cope with a case where the length of the pipe part 120 (the outer pipe 122 and the inner pipe 124) is insufficient when the exploration device 100 is inserted deep into the ground.

  4B illustrates the case where the connection outer tube 152 and the connection inner tube 154 are provided between the tube portion 120 and the injection portion 140. However, the present invention is not limited to this, and the tube portion 120 and the lid portion are not limited thereto. A connecting outer tube 152 and a connecting inner tube 154 may be provided between the connecting tube 130 and the connecting tube 130. In that case, the pump connecting portion 122a is preferably provided in the lid portion 130, and the female screw portion 152b of the connecting outer tube 152 and the female screw portion 154b of the connecting inner tube 154 are positioned on the lower side and are covered with the lid. Needless to say, the male screw portion 130c and the male screw portion 130d of the portion 130 are screwed together.

  Further, as described above, the outer tube 122 and the inner tube 124 are separate in the tube portion 120, and the members connected to them in the injection portion 140, that is, the outer tube injection portion 142 and the inner tube injection portion 144 are also separate. is there. Therefore, it is possible to extract the inner tube 124 from the outer tube 122 and the inner tube ejecting unit 144 from the outer tube ejecting unit 142. As a result, the fiberscope can be inserted into the outer tube 122 after extracting the inner tube 124 and the inner tube ejecting portion 144.

  FIG. 5 is a diagram for explaining insertion of the fiberscope 160. 5A and 5B are cross-sectional views for explaining the insertion of the fiberscope 160 into the outer tube 122, and FIG. 5C is a cross-sectional view taken along the line AA in FIG. 5A. Since the inner tube 124 has a small diameter, the fiberscope 160 cannot be inserted into the inner tube 124. However, since the outer tube 122 has a large diameter, the outer tube 122 can be extracted by extracting the inner tube 124 as shown in FIG. The fiberscope 160 can be inserted inside. With such a configuration, it is not necessary to increase the diameter of the inner tube 124 and thus the outer tube 122 in order to obtain a width for inserting the fiberscope 160, so that the size of the exploration device 100 is not increased. In addition, by extracting the inner tube injection unit 144 together with the inner tube 124, it is possible to secure an imaging region (opening area) of the fiber scope 160.

  When the fiberscope 160 is inserted into the outer tube 122 after extracting the inner tube 124 as in the present embodiment, it is preferable to provide a pedestal portion 142c inside the outer tube ejecting portion 142 (see FIG. 5A). The pedestal portion 142c is formed of an inclined surface that decreases in width from the inner wall of the outer tube injection portion 142 toward the tip, and a flat surface on which the edge of the tip of the fiberscope 160 abuts. Thereby, the fiberscope 160 inserted into the outer tube 122 after extracting the inner tube 124 and the inner tube ejecting portion 144 can be simply inserted into the outer tube 122 as shown in FIG. 5B. It is arranged at the center of the injection unit 142. Therefore, it is possible to prevent the convex portion 142b of the outer tube injection portion 142 from entering the imaging region of the fiber scope 160.

  The fiberscope 160 arranged as described above can capture an image from the lower end of the outer tube 122 (strictly speaking, the outer tube ejection unit 142). Thereby, it is possible to grasp the situation below the exploration device 100 in the ground using the fiber scope 160. Therefore, for example, when the buried object is a pipe, the pipe is photographed with the fiber scope 160 to visually recognize the color of the pipe, and it is determined whether the pipe is inserted through a power cable, a communication cable, or the like based on the color. can do. For this reason, it is possible to improve convenience.

  The pedestal 142c also serves as a spacer. That is, as shown in FIG. 5C, the pedestal part 142 c is provided not on the entire surface inside the outer pipe injection part 142 (upper surface of the convex part 142 b) but on a part thereof. Therefore, in the portion of the fiberscope 160 that is not in contact with the pedestal portion 142c, a gap 142d is formed between the inner portion of the outer tube injection portion 142 (see FIG. 5B). With such a configuration, when photographing using the fiberscope 160, water is allowed to flow through the outer tube 122, and the water is discharged through the gap 142d between the inner side of the outer tube ejection unit 142 and the fiberscope 160. It is possible to flow out of the exploration device 100 from the tip (lower end) of the tube ejection unit 142. Therefore, muddy water (sediment) in front of the fiberscope 160 can be removed by the outflowed water, and the field of view of the fiberscope 160 can be made clear. At this time, the momentum of the water flowing into the outer pipe 122 may be such that mud water can be pushed away, and does not need to be as high as during excavation where water flows out.

  By the way, as shown in FIG. 5A, when the fiberscope 160 is inserted into the outer tube 122, the lid portion 130 (see FIG. 2) is removed. Here, even if it is going to attach the cover part 130 shown in FIG. 1 to the upper end of the outer tube | pipe 122 after inserting the fiberscope 160, the cable 160a of the fiberscope 160 exists there. Therefore, the lid 130 cannot be attached to the outer tube 122. Therefore, in this embodiment, when the fiberscope 160 is inserted into the outer tube 122, a handle 170 having a different configuration is attached.

  FIG. 6 is a diagram for explaining the handle 170 and its mounting. 6A is a perspective view of the handle 170 and the vicinity of the upper end of FIG. 5A, and FIG. 6B is a cross-sectional view showing a state where the handle 170 is attached to the outer tube 122. FIG. As shown in FIGS. 5 and 6, a convex portion 122c having a polygonal cross section (hexagonal shape in the figure) is provided near the upper end of the outer peripheral surface of the outer tube 122, and a handle 170 is attached to the convex portion 122c. Installed.

  The handle 170 includes split members 172 and 174 that sandwich the outer peripheral surface of the outer tube 122. The split members 172 and 174 are provided with recesses 172a and 174a fitted on the inner surface with the projections 122c of the outer tube 122, and have an outer tube holding portion 172b having the same diameter as the outer tube 122 on the lower surface and holding it. And 174b. Further, the split members 172 and 174 are provided with cable holding portions 172d and 174d having substantially the same diameter as the cable 160a of the fiber scope 160 on the upper surface and holding the same.

  With such a configuration, when the divided member 172 and the divided member 174 are brought into contact with each other to be in the closed state, the concave portions 172a and 174a and the convex portion 122c are fitted as shown in FIG. Is attached to the outer tube 122 with the outer tube 122 sandwiched therebetween. At this time, the outer tube holding portions 172b and 174b hold the outer tube 122, and the cable holding portions 172d and 174d hold the cable 160a. Then, the handle 170 is securely fixed to the outer tube 122 by engaging the engaging portion 174 c provided on the dividing member 174 with the engaging portion 172 c provided on the dividing member 172. In addition, although the latching | locking part 172c and the engaging part 174c have drawn the patch'n lock in the figure, a well-known lock metal fitting, a kanuki metal fitting, etc. can also be used.

  According to the above configuration, since the handle 170 is attached to the outer peripheral surface of the outer tube 122, the handle 170 can be attached to the main body 110 even when the cable 160 a of the fiberscope 160 exists near the upper end surface of the outer tube 122. it can. Therefore, it is possible to ensure the same operability as the handle 132 described above. Although not shown in the present embodiment, the handle 170 can be attached to the exploration device 100 even when the pipe of the pump 102 or the pipe of the compressor 104 is connected to the upper end surface of the outer pipe 122, for example. It becomes possible.

  The handle 170 described above also functions as a lid. That is, when the handle 170 is attached to the outer tube 122, the upper surface of the outer tube 122 is sealed by the cable holding portions 172 d and 174 d of the handle 170. Therefore, even if water is supplied to the outer tube 122 during photographing with the fiber scope 160, water overflow from the upper end of the outer tube 122 is prevented.

  It is preferable to attach a waterproof member (seal member) such as packing or O-ring to the inner peripheral surfaces of the cable holding portions 172d and 174d. Thereby, the airtightness when the handle 170 is attached to the outer tube 122 can be improved, and the overflow from the upper end of the outer tube 122 can be more reliably prevented.

  Further, the handle 170 described above is not necessarily limited to this. For example, a configuration may be adopted in which an insertion hole through which the cable 160a can be inserted is provided in the center of the lid portion 130 shown in FIG. 1, and a sealing member for sealing the insertion hole is inserted when the insertion hole is not used. .

  Next, the exploration of the buried object using the exploration device 100 according to the present embodiment will be described. FIG. 7 is a diagram for explaining the exploration of the buried object 198 by the exploration device 100. In FIG. 7, the pump 102 and the compressor 104 are not shown.

  When the buried object 198 is searched at the work site shown in FIG. 7A, first, the concrete 190a in the vicinity of the ground 190 of the place where the search is performed is excavated, and the main body 110 (the searching device 100 is shown in FIG. 7B). ) Is inserted. And the front-end | tip of the main body 110, ie, the injection part 140, is inserted in the hole 192a, water is pumped into the main body 110 from the pump 102, and air is pumped from the compressor 104 (refer FIG. 1). And in the injection part 140, water and air become the jet water flow 194, and are injected in the ground.

  Since the jet water stream 194 has a stronger momentum than mere high-pressure water, the soil 190b is excavated in the vicinity of the injection unit 140 by the momentum, and a hole 192b is formed in the ground. When the main body 110 (the exploration device 100) is inserted along the hole 192a, the soil 190b is further excavated. By continuing this process, a hole 192b having an arbitrary depth is formed deep into the ground as shown in FIG.

  Here, in FIG.7 (c), most pipe parts 120 are inserted in the ground, and the handle 132 is adjoining to the ground 190. FIG. This makes it impossible to insert deeper into the ground. Therefore, as shown in FIG. 7D, the connecting outer tube 152 and the connecting inner tube 154 (the connecting inner tube 154 is not shown) are connected to the tube portion 120. This makes it possible to perform further insertion. When the jet water stream 194 is re-injected to excavate the soil 190b, the main body 110 is inserted deeper into the ground, and the tip of the injection unit 140 contacts the buried object 198 as shown in FIG. Such buried object 198 is searched.

  Thereafter, if necessary, the inner tube 124 and the inner tube ejecting portion 144 attached to the tip of the inner tube 124 are extracted from the outer tube 122, and the fiberscope 160 is inserted into the outer tube 122 (see FIG. 5). Thereby, as shown in FIG.7 (f), an image | photograph can be image | photographed from the lower end of the outer tube | pipe injection part 142, and the conditions under the search apparatus 100, such as the kind of the embedded object 198, can be grasped | ascertained. As described above, it is more preferable to flow water through the outer tube 122 at the time of photographing because the field of view becomes clear.

  As described above, according to the exploration device 100 according to the present embodiment, the exploration of the buried object 198 in the ground can be easily performed simply by inserting the main body 110 into the hole 192b formed by excavation by the jet water flow 194. It can be carried out. Therefore, since the force for inserting the exploration device (exploration rod) into the ground is not required as in the prior art, the labor of the operator can be reduced and the damage to the buried object 198 can be surely prevented. . Further, since the exploration device 100 is simply inserted into the hole 192b without applying a force, a pressure bulb as in the prior art is not formed. Therefore, a great amount of labor for penetrating the exploration device 100 through the pressure bulb is not required, and the working efficiency can be greatly improved.

  In the exploration device 100 described above, the outer tube 122 and the inner tube 124 of the tube unit 120 are configured as separate bodies. However, when the inner tube 124 does not need to be extracted, such as when the fiberscope 160 is not inserted, The outer tube and the inner tube may be integrated as follows.

  FIG. 8 is a diagram illustrating another example of the pipe portion. FIG. 8A is an external perspective view of a tube portion 220 as another example, and FIG. 8B is a cross-sectional view of FIG. FIG. 9 is a diagram illustrating another example of the lid and the ejection unit. FIG. 9A is an external perspective view of a lid portion 230 as another example, and FIG. 9B is a cross-sectional perspective view of an ejection portion 240 as another example. In addition, about the element which has the same structure and function as embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIGS. 8A and 8B, in the pipe part 220, the outer pipe 222 and the inner pipe 224 are connected to each other by a connecting part 226 provided therebetween, and are integrally formed. Although not shown, a connecting portion 226 is similarly provided at the lower end of the tube portion 220. The connecting portion 226 is provided along the longitudinal direction of the tube portion 220 from below the female screw portion 222b of the outer tube 222. Thus, by providing the connection part 226 in a strip shape, the outer tube 222 and the inner tube 224 are reliably connected.

  The inner tube 224 is not provided with a female screw portion. When the outer tube 222 and the inner tube 224 are integrally formed as in the tube portion 220, when the female screw portion is provided in both the outer tube 222 and the inner tube 224, the tube portion 220 has double threads. It will be. This is because it is difficult to smoothly rotate the tube portion 220 when the lid portion 230 is rotated to connect the lid portion 230 to the tube portion 220.

  Therefore, as shown in FIG. 9A, the lid portion 230 also does not have a male screw portion in a portion connected to the inner tube 224, and instead has an outer diameter slightly smaller than the inner diameter of the inner tube 224. A fitting portion 232 is provided. Accordingly, the male screw portion 230c is screwed into the female screw portion 222b of the outer tube 222 while rotating the lid portion 230, whereby the fitting portion 232 is pushed into the upper end of the inner tube 224. 224 can be connected.

  As shown in FIG. 9A, it is preferable that a packing 232 a is provided at the upper end of the fitting portion 232. Thereby, when the fitting part 232 is pushed into the inner tube 224, the packing 232a is deformed and the inside of the inner tube 224 is hermetically sealed, and water can be suitably prevented from entering there.

  Further, as shown in FIG. 9B, the outer pipe injection section 242 and the inner pipe injection section 244 are also integrally formed in the injection section 240. Even in such a configuration, the water that has flowed into the outer pipe injection unit 242 passes through the communication hole 244c and flows into the inner pipe injection unit 244 to become a jet water flow, and is ejected from the ejection hole 244e. Accordingly, the jet water flow can be suitably jetted as in the jetting unit 140.

  In the injection unit 240, the male screw part is not provided in the portion connected to the inner tube 224, and only the male screw part 242a of the outer tube injection unit 242 is provided. The inner pipe injection part 244 is provided with a fitting part 244 a having an outer diameter slightly smaller than the inner diameter of the inner pipe 224. Thereby, even when connecting the injection part 240 to the pipe part 220, smooth attachment / detachment is possible.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  INDUSTRIAL APPLICABILITY The present invention can be used for a buried object searching device that searches a buried object buried in the ground.

DESCRIPTION OF SYMBOLS 100 ... Exploration apparatus, 102 ... Pump, 104 ... Compressor, 110 ... Main body, 120 ... Pipe part, 122 ... Outer pipe, 122a ... Pump connection part, 122b ... Female screw part, 122c ... Convex part, 124 ... Inner pipe, 124b ... Female screw part, 130 ... Cover part, 130a ... Compressor connection part, 130b ... Flow passage, 130c ... Male screw part, 130d ... Male screw part, 130e ... Handle mounting hole, 132 ... Handle, 140 ... Injection part, 142 ... Outer pipe injection part, 142a ... male screw part, 142b ... convex part, 142c ... pedestal part, 142d ... gap, 144 ... inner pipe injection part, 144a ... male screw part, 144b ... convex part, 144c ... communication hole, 144e ... Ejection hole 152 ... outer connecting pipe, 152a ... male screw part, 152b ... female screw part, 154 ... connecting inner pipe, 154a ... male screw part, 154b ... female screw part, 160 ... phi Scope, 160a ... Cable, 170 ... Handle, 172 ... Divided member, 172a ... Recessed portion, 172b ... Outer tube clamping portion, 172c ... Locking portion, 172d ... Cable clamping portion, 174 ... Dividing member, 174a ... Recessed portion, 174b ... Outside Pipe clamping part, 174c ... engaging part, 174d ... cable clamping part, 190 ... ground, 190a ... concrete, 190b ... earth, 192a ... hole, 192b ... hole, 194 ... jet water flow, 198 ... buried object, 220 ... pipe part 222 ... Outer tube, 222b ... Female screw part, 224 ... Inner pipe, 226 ... Connection part, 230 ... Lid part, 230c ... Male screw part, 232 ... Insertion part, 232a ... Packing, 240 ... Injection part, 242 ... Outer Pipe injection part, 242a ... male screw part, 244 ... inner pipe injection part, 244c ... communication hole, 244e ... ejection hole

Claims (6)

A buried object exploration device for exploring buried objects buried in the ground,
A long outer tube inserted into the ground,
An inner tube inserted into the outer tube;
A pump for pumping water to one of the outer tube or the inner tube;
A compressor for pumping air to the other of the outer pipe or the inner pipe;
An injection unit that is provided at a lower end of the outer pipe, mixes the pumped water and air into a jet water stream, and jets the jet water stream into the ground for excavation;
A buried object exploration device comprising:   The buried object exploration device according to claim 1, further comprising: a connection outer pipe that is connected to and extends from the outer pipe; and a connection inner pipe that is connected to and extends the inner pipe.   The embedded object searching device according to claim 1, further comprising a handle that is detachably attached to an upper end of the embedded object searching device. The outer tube has a convex portion near the upper end of the outer peripheral surface,
The said handle | steering_wheel consists of a division member which pinches | interposes the outer peripheral surface of the said outer tube | pipe, and has a recessed part fitted to the said convex part on the inner surface, The embedded object search apparatus of Claim 3 characterized by the above-mentioned. The central part of the inner pipe and the injection part can be extracted from the outer pipe,
2. The embedment according to claim 1, wherein a fiberscope is inserted into the outer tube after extracting the central portion of the inner tube and the injection unit, and an image can be taken from a lower end of the injection unit. Object exploration device.   6. The buried object exploration device according to claim 5, wherein water can flow out from a lower end of the ejection unit through the space between the outer tube and the fiberscope while photographing with the fiberscope.

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