JP2021173009A - Protector of embedded object and installation structure - Google Patents

Abstract

To provide a protector of an embedded object that exhibits a protecting function of an underground embedded object more surely and/or that is light-weight, compact and easy to be handled.SOLUTION: A protector 100 of an embedded object protects an underground embedded object from a road cutter. The protector 100 of an embedded object comprises a sheet member 101 constituted to be entangled into a rotary cutter of a road cutter when coming into contact with the rotary cutter, a hollow cylindrical inner shell member 103 for housing inside the sheet member 101 in a non-restricted state, and a rigid and hollow cylindrical outer shell member 104 for housing inside the inner shell member 103. In at least a part of the circumferential directions of the inner shell member 103 and the outer shell member 104, a gap is formed between the outside surface of the inner shell member 103 and the inside surface of the outer shell member 104.SELECTED DRAWING: Figure 1

Description

The present invention relates to a buried object protective device for protecting an underground buried object from a civil engineering work tool such as a road cutter, and an installation structure thereof.

Underground objects such as pipes and wiring are buried under the pavement of the road. When cutting a pavement material with a road cutter in road construction, the road cutter may accidentally cut and damage the underground buried object. Various buried object protective devices are used to prevent such damage.

For example, Patent Document 1 discloses an underground protective device that stops a rotating pavement cutting cutter blade (road cutter) to prevent damage to a buried object to be protected. Hereinafter, in the paragraph, the reference numerals of Patent Document 1 are shown in parentheses. The underground protective equipment of Patent Document 1 is a high-strength fiber sheet (2) having a shape of being spread on the inner bottom surface of the box body (1) in a hollow flat plate-shaped box body (1) whose exterior is made of a rigid body. The elastic body (7) placed on the high-strength fiber sheet (2) is placed floating from the bottom surface of the box body (1) by the spacer member (5), and is placed between the box and the ceiling of the box body (1). The member housed in the body (1) is temporarily pressed and held. The underground buried object protective equipment is buried in the ground between the protected buried object (15) and the paved road surface (12). When the pavement cutting cutter blade (11) is cut into the protective equipment, the high-strength fiber sheet (2) is entangled in the groove of the cutter blade (11) before the entire protective equipment is cut, and the cutter blade (cutter blade (11) The 11) bites into the cut groove made in the box body (1) one after another together with the high-strength fiber sheet (2) to resist the rotation of the cutter blade (11). As a result, the overload protection device of the pavement cutting cutter works to stop the rotation of the cutter blade (11), thereby preventing damage to the protected object (15) buried below.

Patent Document 2 discloses a cutting protective material for underground buried objects against a road cutter. Hereinafter, in the paragraph, the reference numerals of Patent Document 2 are shown in parentheses. The cutting protective material (1) of Patent Document 2 is preferably a pipe material (4) made of synthetic resin such as vinyl chloride, polypropylene, or polyethylene, and has a concrete (5) covering thickness T (15 mm or more) of a certain value or more. In the longitudinal direction in the hollow portion of the pipe material (4), a plurality of long fiber materials (6) that are difficult to cut with the road cutter (3) and easily entangled are inserted in an unrestrained state. It is composed of. When burying the underground buried object (2), it is used by burying it at a position slightly closer to the ground surface than the underground buried object (2) and at both sides along the underground buried object (2). Even if the worker drives the road cutter (3) to cut the road without any prior knowledge about the existence of the underground buried object (2) during the road construction that occurs after that, the cutter (3) will still work. When approaching the underground buried object (2), the cutter (3) cuts the concrete (5) of the cutting protective material (1), and further proceeds to the cutting of the pipe material (4). The long fiber material (6), which is difficult to cut and easily entangled in the hollow part, clings to the cutting edge of the cutter (3) with almost no cutting, and slips from the cut end (7) of the concrete (5). It will be in a state of being pulled out. As a result, the frictional force with respect to the cutter (3) becomes enormous, and the rotation of the cutter (3) becomes extremely difficult or stopped, and the cutting work is unavoidably interrupted.

Japanese Unexamined Patent Publication No. 2011-211883 Japanese Unexamined Patent Publication No. 2004-360867

In the underground protective equipment of Patent Document 1, when a metal plate (box body) is cut with a road cutter, metal burrs are likely to occur in the cut groove. Therefore, the high-strength fiber sheet has a problem that it is often caught in the metal burr of the cut groove and cannot be pulled out from the cut groove before it is sufficiently entangled with the blade of the road cutter. As described above, when the high-strength fiber sheet is not pulled out from the cut groove, the rotation of the blade cannot be stopped, and the problem is that the protective function of the underground buried object cannot be reliably exerted. On the other hand, the cutting protective material of Patent Document 2 uses a concrete exterior material instead of using a metal plate. The cutting protective material does not cause any problem due to the generation of metal burrs. However, since the cutting protective material requires a concrete exterior material having a thickness of 15 mm or more, there is a problem that the weight and the outer shape become large and the handling becomes inconvenient.

The present invention has been made to solve at least one of the above problems, and an object thereof is to more reliably exert a protective function of an underground buried object and / or a lightweight, compact and easy-to-handle buried object. To provide protective equipment and its installation structure.

The buried object protective device according to claim 1 is a buried object protective device for protecting an underground buried object from a road cutter.
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A hollow cylindrical inner shell member that houses the sheet member in an unrestrained state, and
A rigid and hollow cylindrical outer shell member for accommodating the inner shell member is provided.
At least a part of the inner shell member and the outer shell member in the circumferential direction is characterized in that a gap is formed between the outer surface of the inner shell member and the inner surface of the outer shell member.

The buried object protective device according to claim 2 is the buried object protective device according to claim 1, further comprising a waterproof or low water permeability bag member surrounding the sheet member.

The buried object protective device according to claim 3 is the buried object protective device according to claim 1 or 2, wherein the gap is formed in the entire circumferential direction of the inner shell member and the outer shell member. It is characterized by.

The buried object protective device according to claim 4 is the buried object protective device according to any one of claims 1 to 3, wherein the outer shell member is thinner than the inner shell member. do.

The buried object protective device according to claim 5 is the buried object protective device according to any one of claims 1 to 4, wherein the inner shell member is made of synthetic resin and the outer shell member is made of metal. It is characterized by being.

The buried object protective device according to claim 6 is the buried object protective device according to any one of claims 1 to 5, wherein the end portion of the outer shell member is closed by a closing member. And.

The buried object protective device according to claim 7 is the end of the inner shell member according to claim 6 so that the outer surface of the inner shell member is separated from the inner surface of the outer shell member in the entire circumferential direction. The portion is supported by the closing member.

The buried object protective device according to claim 8 is the buried object protective device according to any one of claims 1 to 7, wherein the inner shell member has a substantially circular cross-sectional shape, and the outer shell has a substantially circular cross-sectional shape. The member is characterized by having a substantially rectangular cross-sectional shape.

The buried object protective device according to claim 9 is the buried object protective device according to any one of claims 1 to 8, and the sheet member has a substantially U-shape or a substantially V-shape in a cross-sectional view. It is characterized in that it is bent into a shell member and housed in the inner shell member.

The buried object protective device according to claim 10 is a buried object protective device for protecting an underground buried object from a road cutter.
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A waterproof or low water permeability bag member that surrounds the sheet member,
A tubular member that houses the seat member inside in an unrestrained state is provided.
The sheet member is bent into a substantially U-shape or a substantially V-shape in cross-sectional view and is housed in the inner shell member.

The buried object protective device according to claim 11 is the buried object protective device according to claim 9 or 10, wherein the sheet member is held inside the inner shell member so as not to roll in the circumferential direction. It is characterized by that.

The buried object protective device according to claim 12 is the buried object protective device according to any one of claims 9 to 11, further comprising a display unit for displaying the direction of the bent posture of the seat member to the outside. It is characterized by.

The buried object protective device according to claim 13 is a buried object protective device for protecting an underground buried object from a road cutter.
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A waterproof or low water permeability bag member that surrounds the sheet member,
A hollow cylindrical synthetic resin inner shell member that houses the sheet member in an unrestrained state, and
A rigid and hollow cylindrical metal outer shell member for accommodating the inner shell member is provided.
The outer shell member is characterized in that it is thinner than the inner shell member.

The installation structure according to claim 14 is an installation structure in which a buried object protective device for protecting an underground buried object from a road cutter is installed.
The buried object protective equipment
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A hollow cylindrical inner shell member that houses the sheet member in an unrestrained state, and
A rigid and hollow cylindrical outer shell member for accommodating the inner shell member is provided.
A gap is formed between the outer surface of the inner shell member and the inner surface of the outer shell member on the outer surface of the inner shell member facing at least the ground side.

The installation structure according to claim 15 is an installation structure in which a buried object protective device for protecting an underground buried object from a road cutter is installed.
The buried object protective equipment
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A hollow cylindrical inner shell member that houses the sheet member in an unrestrained state, and
A rigid and hollow cylindrical outer shell member for accommodating the inner shell member is provided.
The sheet member is bent into a substantially U-shape or a substantially V-shape and housed in the inner shell member in a cross-sectional view of the buried object protective device, and the sheet member has a substantially U-shape or a substantially V-shape. It is characterized in that the open end of the is arranged so as to face the ground side.

The installation structure according to claim 16 is an installation structure in which a buried object protective device for protecting an underground buried object from a road cutter is installed.
The buried object protective equipment
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A waterproof or low water permeability bag member that surrounds the sheet member,
A tubular member that houses the seat member inside in an unrestrained state is provided.
The sheet member is bent into a substantially U-shape or a substantially V-shape and housed in the tubular member in a cross-sectional view of the buried object protective device, and the seat member has a substantially U-shape or a substantially V-shape. It is characterized in that the open end is arranged so as to face the ground side.

According to the buried object protective device according to claim 1, when the road cutter comes into contact with the buried object protective device, the rotary blade of the road cutter cuts the rigid outer shell member and cuts open the inner shell member to form a sheet member. After reaching, the unrestrained sheet member is entangled by the rotary blade to reach the cut of the outer shell member, and further, while being pulled out to the outside, is entangled with the rotary blade to stop the operation of the road cutter. Since the buried object protective device is a tubular member having a double tubular structure consisting of an inner shell member and an outer shell member, after the rotary blade cuts the outer shell member, the inner shell member is cut and reaches the seat member. There will be a slight time lag. In the present invention, in addition to this time difference, a gap is formed between the inner shell member and the outer shell member, so that the time from being entangled by the rotary blade to reaching the cut of the outer shell member is increased. It is possible to secure a longer time and increase the amount of entanglement of the seat member with the rotary blade in the stage before the seat member is pulled out from the cut. That is, in the present invention, by winding the sheet member inside the outer shell member by the rotary blade, it is possible to more reliably pull out the sheet member from the cut of the outer shell member without using a concrete exterior material. Become. Therefore, the buried object protective device of the present invention is lightweight, compact, and easy to handle, and more reliably exhibits the protective function of the underground buried object.

According to the buried object protective device according to claim 2, in addition to the effect of the invention of claim 1, the sheet member is surrounded by a waterproof or low water permeability bag member, so that the sheet member is underground. It prevents water from entering, and when the road cutter comes into contact with the buried object protective equipment, it can get entangled with the rotary blade before being exposed to water.

According to the buried object protective device according to claim 3, in addition to the effect of the invention of claim 1 or 2, since a gap is formed in the entire circumferential direction, the rotary blade of the road cutter is in the circumferential direction. Regardless of the contact with any outer surface, the protective function can be stably exerted.

According to the buried object protective device according to claim 4, in addition to the effect of the invention according to any one of claims 1 to 3, the outer shell member is thinner than the inner shell member, so that the outer shape of the buried object protective device is formed. Can be made more compact.

According to the buried object protective device according to claim 5, in addition to the effect of the invention according to any one of claims 1 to 4, the inner shell member is made of synthetic tree resin and the outer shell member is made of metal. , The weight of the buried object protective equipment can be reduced.

According to the buried object protective device according to claim 6, in addition to the effect of the invention according to any one of claims 1 to 5, the end portion of the outer shell member is closed by the closing member, so that water or water or water is inside. It is possible to prevent the invasion of soil and the like.

According to the buried object protective device according to claim 7, in addition to the effect of the invention of claim 6, the closing member floats and holds the inner shell member from the outer shell member, so that the inner shell member is floated and held in the entire circumferential direction with a simple configuration. It is possible to form a gap over the surface.

According to the buried object protective device according to claim 8, in addition to the effect of the invention according to any one of claims 1 to 7, the outer shape of the buried object protective device is square, so that the buried object protective device can be used after installation. It is possible to prevent rolling. Further, a wider gap can be formed between the round inner shell member and the square outer shell member (compared to the case of round shapes), and the amount of entanglement of the sheet member with the rotary blade can be reduced. Can be increased.

According to the buried object protective device according to claim 9, in addition to the effect of the invention according to any one of claims 1 to 8, the seat member takes a substantially U-shaped or substantially V-shaped posture in a cross-sectional view. Therefore, when the rotary blade comes into contact with the rotary blade, the sheet member can be wound around the rotary blade while being developed in a straight line and easily pulled out to the outside.

According to the buried object protective device according to claim 10, when the road cutter comes into contact with the buried object protective device, the rotary blade cuts open the tubular wall of the tubular member to reach the sheet member, and then the seat member is in an unrestrained state. Is entangled by the rotary blade, and is entangled with the rotary blade while being pulled out from the tubular member to stop the operation of the road cutter. In addition, the waterproof or low-permeability bag member surrounds the sheet member to prevent the sheet member from being flooded in the ground, and when the road cutter comes into contact with the buried object protective equipment, water is generated. It is possible to get entangled with the rotary blade before being exposed to. As a result, a decrease in the amount of entanglement due to water wetting of the sheet member can be suppressed. Further, since the seat member takes a substantially U-shaped or substantially V-shaped posture in cross-sectional view, it is easy to wind the seat member around the rotary blade while deploying it in a straight line when the rotary blade comes into contact with the rotary blade. It is possible to pull out to. That is, the present invention makes it possible to more reliably pull out the seat member from the cut of the tubular member by the above configuration, and more reliably exerts the protective function of the underground buried object.

According to the buried object protective device according to claim 11, in addition to the effect of the invention of claim 9 or 10, the seat member is held inside the inner shell member so as not to roll in the circumferential direction. The posture of the seat member can be maintained so that the substantially U-shaped or substantially V-shaped open end is arranged at a position where it can easily come into contact with the rotary blade.

According to the buried object protective device according to claim 12, in addition to the effect of the invention according to any one of claims 9 to 11, a position where a substantially U-shaped or substantially V-shaped open end is easily brought into contact with the rotary blade. The posture of the seat member can be visually grasped so as to be arranged in.

According to the buried object protective device according to claim 13, when the road cutter comes into contact with the buried object protective device, the rotary blade of the road cutter cuts the rigid outer shell member and cuts open the inner shell member to form the sheet member. After reaching, the unrestrained sheet member is entangled by the rotary blade to reach the cut of the outer shell member, and further, while being pulled out to the outside, is entangled with the rotary blade to stop the operation of the road cutter. Further, in the present invention, a metal outer shell member is arranged outside the synthetic resin inner shell member that houses the seat member in an unrestrained state, and the outer shell member is made thinner than the inner shell member. It is characterized by that. That is, in the present invention, since the buried object protective device is a tubular member having a double tubular structure consisting of an inner shell member and an outer shell member, the rotary blade cuts the outer shell member and then the inner shell member is cut to form a sheet. There is a slight time lag before reaching the member, and as a result, the amount of entanglement of the sheet member with the rotary blade in the pre-stage of being pulled out from the cut of the outer shell member can be increased. By increasing the amount of entanglement, the sheet member can be pulled out more reliably from the cut of the outer shell member. Further, the buried object protective device of the present invention is lightweight, compact and easy to handle because the outer shell member is thinner than the inner shell member.

According to the installation structure according to claim 14, when the road cutter comes into contact with the buried object protective device, the rotary blade of the road cutter cuts the rigid outer shell member, cuts open the inner shell member, and reaches the seat member. After that, the unrestrained sheet member is entangled by the rotary blade to reach the cut of the outer shell member, and further, while being pulled out to the outside, is entangled with the rotary blade to stop the operation of the road cutter. Since the buried object protective device is a tubular member having a double tubular structure consisting of an inner shell member and an outer shell member, after the rotary blade cuts the outer shell member, the inner shell member is cut and reaches the seat member. There will be a slight time lag. In the present invention, in addition to this time difference, a gap is formed between the inner shell member and the outer shell member, so that the sheet member is entangled with the rotary blade until it reaches the cut of the outer shell member. It is possible to secure a longer time or distance and increase the amount of entanglement of the seat member with the rotary blade in the stage before the seat member is pulled out from the cut. In particular, in many cases, since the rotary blade comes into contact with the buried object protective device from above, the amount of entanglement can be effectively increased by providing a gap on the outer surface of the inner shell member facing at least the ground side. That is, in the present invention, by winding the sheet member inside the outer shell member by the rotary blade, it is possible to more reliably pull out the sheet member from the cut of the outer shell member without using a concrete exterior material. Become. Therefore, the installation structure of the present invention more reliably exerts the protective function of the underground buried object.

According to the installation structure according to claim 15, when the road cutter comes into contact with the buried object protective device, the rotary blade of the road cutter cuts the rigid outer shell member, cuts open the inner shell member, and reaches the seat member. After that, the unrestrained sheet member is entangled by the rotary blade to reach the cut of the outer shell member, and further, while being pulled out to the outside, is entangled with the rotary blade to stop the operation of the road cutter. Since the buried object protective device is a tubular member having a double tubular structure consisting of an inner shell member and an outer shell member, after the rotary blade cuts the outer shell member, the inner shell member is cut and reaches the seat member. There will be a slight time lag. As a result, the amount of entanglement of the sheet member with the rotary blade in the pre-stage of being pulled out from the cut of the outer shell member can be increased. Further, in the present invention, the seat member is bent into a substantially U-shape or a substantially V-shape and housed in the inner shell member in a cross-sectional view of the buried object protective device, and the seat member has a substantially U-shape or a substantially V-shape. The open end of the character shape is arranged so as to face the ground side. As a result, the rotary blade that comes into contact with the buried object protective device from above comes into contact with the open end having a substantially U-shape or a substantially V-shape, and the sheet member is wound around the rotary blade while being developed in a straight line to form an outer shell member. It can be easily pulled out from the cut. That is, in the present invention, by winding the sheet member inside the outer shell member by the rotary blade, it is possible to more reliably pull out the sheet member from the cut of the outer shell member without using a concrete exterior material. Become. Therefore, the installation structure of the present invention more reliably exerts the protective function of the underground buried object.

According to the installation structure according to claim 16, when the road cutter comes into contact with the buried object protective device, the unrestrained seat member rotates after the rotary blade cuts open the tubular wall of the tubular member and reaches the seat member. The road cutter is stopped by being entangled by the blade and entwined with the rotary blade while being pulled out from the tubular member. In addition, the waterproof or low-permeability bag member surrounds the sheet member to prevent the sheet member from being flooded in the ground, and when the road cutter comes into contact with the buried object protective equipment, water is generated. It is possible to get entangled with the rotary blade before being exposed to. As a result, a decrease in the amount of entanglement due to water wetting of the sheet member can be suppressed. Further, in the present invention, the seat member is bent into a substantially U-shape or a substantially V-shape and housed in the inner shell member in a cross-sectional view of the buried object protective device, and the seat member has a substantially U-shape or a substantially V-shape. The open end of the character shape is arranged so as to face the ground side. As a result, the rotary blade that comes into contact with the buried object protective equipment from above comes into contact with the open end having a substantially U-shape or a substantially V-shape, and the sheet member is wound around the rotary blade while being developed in a straight line, and the cut of the tubular member is formed. It can be easily pulled out from. That is, according to the present invention, the seat member can be pulled out more reliably from the cut of the tubular member by the above configuration. Therefore, the installation structure of the present invention more reliably exerts the protective function of the underground buried object.

The schematic perspective view of the buried object protective equipment of one Embodiment of this invention. (A) front view and (b) plan view of the buried object protective equipment of FIG. AA cross-sectional view of the buried object protective equipment of FIG. (A) BB vertical cross-sectional view and (b) CC vertical cross-sectional view of the buried object protective equipment of FIG. An exploded perspective view of the buried object protective equipment of FIG. 1 (a) a perspective view from the front, (b) a perspective view from the back surface, (c) a plan view, (d) a side view, and (e) a cross-sectional view taken along the line DD of the closing member of the buried object protective device of FIG. It is a schematic diagram which shows the mode of protecting the underground buried object from the rotary blade of a road cutter by the buried object protective equipment of one Embodiment of this invention, and the rotary blade approaches the buried object protective equipment and cuts an outer shell member. Indicates the stage. It is a schematic diagram which shows the mode of protecting the underground buried object from the rotary blade of a road cutter by the buried object protective tool of one Embodiment of this invention, and the sheet member of the buried object protective tool is entangled with the rotary blade, and the rotary blade rotates. Indicates the stage to stop. The schematic plan view of the 1st installation structure by the buried object protective equipment of one Embodiment of this invention. FIG. 9 is a cross-sectional view taken along the line EE of the first installation structure of FIG. (A) A perspective view seen from above and (b) a perspective view seen from below of the buried object protection device by the buried object protective device according to the embodiment of the present invention. 11 (a) plan view, (b) front view, and (c) bottom view of the buried object protection device of FIG. FIG. 12 is a cross-sectional view taken along the line FF of the buried object protection device of FIG. A partially exploded perspective view of the buried object protection device of FIG. 11 is a perspective view of the substrate of the buried object protection device (a) viewed from above, and (b) a perspective view viewed from below. 15 (a) plan view, (b) front view, and (c) bottom view of the substrate of FIG. The schematic plan view of the 2nd installation structure by the buried object protection device of one Embodiment of this invention. FIG. 17 is a cross-sectional view taken along the line GG of the second installation structure of FIG. FIG. 17 is a cross-sectional view taken along the line HH of the second installation structure of FIG. FIG. 6 is a schematic cross-sectional view showing another example of use of the buried object protective device according to the embodiment of the present invention. The schematic perspective view of the buried object protective equipment of the buried object protection device of another embodiment of this invention. 21 (a) front view and (b) plan view of the buried object protective equipment of FIG. 21. 21 (a) I-I cross-sectional view and (b) JJ vertical cross-sectional view of the buried object protective equipment of FIG. 21. FIG. 21 is a schematic view showing an embodiment in which an underground buried object is protected from a rotary blade of a road cutter by the buried object protective tool of FIG. 21, and shows a stage in which the rotary blade approaches the buried object protective tool and cuts an outer shell member. FIG. 21 is a schematic view showing an embodiment in which an underground buried object is protected from a rotary blade of a road cutter by the buried object protective tool of FIG. 21, and shows a stage in which the rotary blade approaches the buried object protective tool and cuts an outer shell member. The schematic diagram which shows the modification of the buried object protective equipment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The shapes of the drawings referred to in the following description are conceptual diagrams or schematic views for explaining suitable shape dimensions, and the dimensional ratios and the like do not always match the actual dimensional ratios. That is, the present invention is not limited to the dimensional ratio in the drawings.

The buried object protective tool 100 of the embodiment of the present invention is used to protect an underground buried object such as a wiring / piping material buried under a road pavement material from a civil engineering work tool such as a road cutter. In particular, the buried object protective device 100 of the present embodiment is buried so as to intervene between the pavement material and the underground buried object, and when the road cutter that cuts the pavement material comes into contact with the buried object protective device 100. , The operation of the road cutter is stopped directly or indirectly to prevent the road cutter from accidentally reaching the underground buried object. The configuration of the buried object protective device 100 will be described in detail with reference to FIGS. 1 to 5. FIG. 1 is a schematic perspective view of the buried object protective device 100. 2 (a) and 2 (b) are a front view and a plan view of the buried object protective device 100. FIG. 3 is a cross-sectional view taken along the line AA of the buried object protective device 100. 4 (a) and 4 (b) are a BB vertical cross-sectional view and a CC vertical cross-sectional view of the buried object protective device 100. FIG. 5 is an exploded perspective view of the buried object protective device 100.

As shown in FIGS. 1 to 5, the buried object protective device 100 is a long body having a square bar-shaped outer shape extending at a predetermined length. The buried object protective device 100 includes a seat member 101 and a hollow cylindrical tubular member 102 that houses the seat member 101 inside.

The sheet member 101 is a flexible sheet extending over the entire longitudinal direction of the buried object protective device 100. Although not shown, the sheet member 101 has a rectangular shape when unfolded, and is bent inside the tubular member 102 so as to have a V or U shape in a cross-sectional view. In the present embodiment, as shown in FIG. 3, in the cross-sectional view, the sheet members 101 are doubly overlapped and then bent into a substantially U-shape or a substantially V-shape. Further, the sheet member 101 is made of a material that is caught in the groove of the rotary blade when it comes into contact with the rotary blade of the road cutter and is entangled with the rotary blade. In this embodiment, the sheet member 101 can be formed of a high-strength fiber sheet. More specifically, the sheet member 101 can be formed of a woven fabric or non-woven fabric of aramid fibers, a woven fabric or non-woven fabric mixed with aramid fibers, or the like. Needless to say, the material is not limited to the above as long as the sheet member can be entangled with the rotary blade of the road cutter.

Further, the sheet member 101 is hermetically surrounded by the bag member 105. The bag member 105 is made of a waterproof or low water immersion material and functions to prevent water from entering the inside. That is, the bag member 105 prevents the sheet member 101 from being flooded in the ground, and when the road cutter comes into contact with the buried object protective device 100, the rotary blade is exposed to water (in a dry state) before being exposed to water. Allows entanglement. The bag member 105 can be selected from, for example, a bag made of a general synthetic resin such as vinyl chloride or polypropylene. The bag member 105 is vulnerable to tearing immediately when the rotary blade of the road cutter comes into contact with it.

The sheet member 101 sealed in the bag member 105 is housed inside the tubular member 102 in an unrestrained state. The unrestrained state means a state in which the seat member 101 is not completely fixed to the tubular member 102 and can be moved or displaced inside the tubular member 102. Further, the seat member 101 is configured to abut on the inner surface of the tubular member 102 (inner shell member 103). The seat member 101 is bent in a substantially U-shape or a substantially V-shape so as not to roll in the circumferential direction inside the tubular member 102 while maintaining a bent posture due to the stiffness (stiffness or elasticity) of the seat member 101. It is being held.

The tubular member 102 is a double tubular tubular body that extends at a predetermined length and is open at both ends. The tubular member 102 is composed of an inner shell member 103 made of synthetic resin (or non-metal) and a metal outer shell member 104 that houses the inner shell member 103 inside with a gap. That is, the tubular member 102 has a double tubular structure composed of an inner shell member 103 and an outer shell member 104 that are formed as members that are separate from each other and are made of different materials so that the tubular walls are not integrally bonded or joined to each other. Have. Since the outer shell member 104 is made of a metal cylinder, it is possible to prevent the inner shell member 103 made of synthetic resin from being deformed by earth pressure or heat from asphalt. In particular, the air gap between the inner shell member 103 and the outer shell member 104 further reduces heat transfer. Further, the inner shell member 103 is formed of a round cylinder having a substantially circular cross section, and the outer shell member 104 is formed of a square cylinder having a substantially square cross section. The inner shell member 103 is made of a synthetic resin material that is relatively easy to cut with a rotary blade and is less likely to cause burrs on the cut surface. The outer shell member 104 is formed of a steel plate or the like having rigidity enough to delay the rotation when it comes into contact with the rotary blade of the road cutter, and having a higher rigidity than the inner shell member 103. Further, the outer shell member 104 is formed to be thinner than the inner shell member 103. As shown in FIGS. 3 and 4, the inner shell member 103 and the outer shell member 104 are arranged coaxially, and the outer surface of the inner shell member 103 and the outer shell member are arranged in the entire circumferential direction of the inner shell member 103 and the outer shell member 104. A gap is formed between the 104 and the inner surface. This gap is continuous over substantially the entire longitudinal direction of the tubular member 102. Since the inner shell member 103 has a circular cross section and the outer shell member 104 has a rectangular cross section, as shown in FIGS. 3 and 4B, there are four corners of the outer shell member 104. The size of the gap (distance between the outer surface of the inner shell member 103 and the inner surface of the outer shell member 104 along the radial direction) is maximized.

Both ends of the tubular member 102 are closed by the closing member 106, respectively. 6 (a) to 6 (e) are a front perspective view, a rear perspective view, a front view, a side view, and a DD cross-sectional view of the closing member 106. The closing member 106 has a rectangular flat plate-shaped closing portion 106a that closes both ends of the tubular member 102. The closing portion 106a has an inner surface facing the tubular member 102 side and an outer surface opposite to the inner surface. The outer shape of the closing portion 106a is the same as the outer peripheral shape of the outer cylinder member 104. Further, a first connecting portion 106b extending in a square cylinder shape is provided in the vicinity of the inner peripheral edge of the closing portion 106a. The first connecting portion 106b is configured to be inserted and fitted to the end portion of the outer shell member 104. Further, on the inner surface of the closing portion 106a, a second connecting portion 106c extending in a cylindrical shape is provided inside the first connecting portion 106b. The second connecting portion 106c is configured to be extrapolated and fitted to the end of the inner shell member 103. That is, when the tubular member 102 is closed, the closing member 106 functions to hold the inner shell member 103 and the outer shell member 104 together and to separate them from each other in the entire circumferential direction. Further, the closing member 106 makes it possible to easily assemble the inner shell member 103 and the outer shell member 104 without using means such as welding.

An arrow-shaped display portion 107 is provided on the outer surface of the closing portion 106a. The display unit 107 displays the direction of the bent posture of the seat member 101 to the outside. In other words, the display unit 107 indicates the direction in which the buried object protective device 100 is placed. Here, the closing member 106 is attached to the tubular member 102 so that the direction of the arrow of the display unit 107 and the open end of the seat member 101 having a substantially U-shape or a substantially V-shape are in the same direction. As will be described later, the buried object protective device 100 is installed so that the open end of the seat member 101 having a substantially U-shape or a substantially V-shape faces upward.

Next, with reference to FIGS. 7 and 8, a mode in which the operation of the road cutter is stopped by the buried object protective tool 100 when the rotary blade X of the road cutter comes into contact with the buried object protective tool 100 will be described. In the description, the buried object protective device 100 is exemplifiedly buried directly below the pavement material 18 that paves the surface of the road 15 and above the underground buried object 12. Further, a concrete portion 17 is placed between the pavement material 18 and the underground buried object 12. The structure illustrated here corresponds to the first installation structure 10 described later.

When the rotary blade X of the road cutter goes straight while cutting the pavement material 18 and invades the protective area above the underground buried object 12, the rotary blade X comes into contact with the buried object protective tool 100. As shown in FIG. 7, the rotary blade X comes into contact with the upper corner portion of the outer shell member 104 of the buried object protective device 100 and cuts the meat portion thereof. At this time, since the outer shell member 104 is made of a rigid material (steel material), the rotation speed of the rotary blade X decreases. By cutting the outer shell member 104, metal burrs may be formed at the cuts of the outer shell member 104.

When the rotary blade X goes straight further, the rotary blade X reaches the inner shell member 103 and cuts the meat portion of the inner shell member 103. Since the inner shell member 103 is made of a synthetic resin material (relatively softer than a steel plate), burrs are less likely to be formed at the cut. When the rotary blade X reaches the inside of the inner shell member 103, the rotary blade X comes into contact with the seat member 101 in the unrestrained state. At this time, since the rotary blade X generally comes into contact with the seat member 101 from diagonally above (ground side), the U-shaped or V-shaped open end of the seat member 101 that faces upward rotates first. Can come into contact with blade X. At the same time as this contact, the bag member 105 is immediately broken, and the sheet member 101 begins to be entangled with the rotary blade X. It is conceivable that the seat member 101 is entwined with the rotary blade X while being developed from a U-shaped or V-shaped bent posture.

Then, as shown in FIG. 8, while the sheet member 101 is entangled with the rotary blade X, before the tubular member 102 is completely cut, it passes through the cuts of the inner shell member 103 and the outer shell member 104 to the outside. Pulled out. In particular, in the buried object protective device 100 of the present embodiment, since the tubular member 102 has a double tubular structure, the rotary blade X cuts the outer shell member 104 and then cuts the inner shell member 103 only slightly. Time difference occurs. Due to this time difference, it is possible to increase the amount of entanglement with the rotary blade X before the sheet member 101 reaches the cut of the outer shell member 104. Further, in addition to the time difference, the presence of a gap between the inner shell member 103 and the outer shell member 104 causes a constant amount of entanglement until the sheet member 101 reaches the cut of the outer shell member 104. Can be secured effectively. That is, the buried object protective device 100 has not only the space inside the inner shell member 103 but also the free movement space of the sheet material 101 due to the two-stage structure of the gap between the inner shell member 103 and the outer shell member 104. As a result, the frequency with which the sheet member 101 is captured by the metal burrs at the cuts of the outer shell member 104 can be significantly reduced. Then, when the sheet member 101 is pulled out to the outside and entangled with the rotary blade X, the frictional resistance of the rotary blade X suddenly increases and the rotary blade X stops, or the operator has an abnormality in the rotary blade X. Alternatively, it is possible to notice the change in the state and urge the road cutter to stop operating. As a result, the operator can notice that the rotary blade X of the road cutter has invaded the protected area of the underground buried object 12 and can avoid damage to the underground buried object 12.

By arranging the U-shaped or V-shaped open end of the bent posture toward the ground side, compared with the case where the open end is arranged in another posture (for example, the posture in which the open end faces downward or sideways). Therefore, it has been confirmed by the inventors that the accuracy of stopping the rotary blade X by pulling out the sheet member 101 to the outside of the buried object protective tool 100 is significantly improved. Specifically, when the experiment was conducted by changing only the posture of the seat member 101, the probability that the seat member 101 was pulled out to the outside was about 7 times out of 10 in other postures. In the above posture, the seat member 101 was pulled out with an accuracy of 10 times out of 10 times, and the rotary blade X could be stopped.

A first installation structure 10 according to an embodiment of the present invention will be described with reference to FIGS. 9 and 10. The installation structure 10 is a structure in which a plurality of buried object protectors 100 are installed underground in the road 15 in order to protect the underground buried object 12 buried underground in the road 15 from the rotary blade X of the road cutter. FIG. 9 is a schematic plan view of the installation structure 10. FIG. 10 is a cross-sectional view taken along the line EE.

In the installation structure 10 of the present embodiment, as shown in FIGS. 9 and 10, the road 15 is formed at a roadbed 16 that forms an underground layer with crushed stone or soil, and at a portion of the roadbed 16 that has been excavated. It is composed of a concrete portion 17 and a pavement material 18 forming a surface layer of the road 15. Further, in the present embodiment, the underground buried object 12 is exemplified as two wiring / piping materials laid in the ground. In the installation structure 10, a long underground buried object 12 such as wiring and piping material is laid in the excavated groove of the roadbed 16, and then a concrete portion 17 is placed in the excavated groove to cover and protect the underground buried object 12. Has been cast. Then, in order to protect the underground buried object 12 from the road cutter during the excavation work of the road 15, a plurality of buried object protective tools 100 are buried in the ground. Each buried object protective device 100 is arranged so that the U-shaped or V-shaped open end of the bent posture of the seat member 101 faces the ground side.

The plurality of buried object protective devices 100 are arranged in a ladder shape above the underground buried object 12 extending in the longitudinal direction in the plan view shown in FIG. In the installation structure 10 of the present embodiment, a plurality of buried object protective devices 100 are arranged in a predetermined pattern to construct a protective area that protects the underground buried object 12 from the rotary blade of the road cutter traveling straight. In particular, the plurality of buried object protective devices 100 include a first buried object protective device 1001 having a first length and a second buried object protective device 1001 having a second length smaller than the first length. It consists of 1002. In this embodiment, the first length is about twice the second length. The first buried object protective device 1001 of the plurality of buried object protective devices 100 is arranged along the arrangement direction of the underground buried object 12, and the second buried object protective device 1002 is arranged with the underground buried object 12. They are arranged along the direction orthogonal to the installation direction (hereinafter referred to as the orthogonal direction). The first buried object protective equipment 1001 is arranged in the arrangement direction so as to form a plurality of rows (here, three rows). Further, the buried object protective devices 1001, 1001 adjacent to the arrangement direction are arranged slightly offset in the orthogonal direction so as to partially polymerize in the arrangement direction. On the other hand, the second buried object protective equipment 1002 is arranged so as to be bridged between the rows of the first buried object protective equipment 100 in parallel. In the present embodiment, two second buried object protective devices 1002 are erected with respect to one first buried object protective device 1001. That is, in the installation structure 10, since the first buried object protective tool 1001 and the second buried object protective device 1002 are assembled in a grid pattern without gaps, the rotary blade of the road cutter travels straight to protect from the outside. It has an array structure configured so that the rotary blade always passes through the buried object protector 100 when entering the inside of the region.

Further, it is preferable that the distance between the buried object protective devices 100 arranged vertically and horizontally is equal to or smaller than the diameter of the rotary blade of the road cutter. Further, it is more preferable that the diagonal distance of one grid of the buried object protective device 100 is equal to or less than the diameter of the rotary blade of the road cutter. Further, it is preferable that the interval between the buried object protective equipment 100 is determined according to the burial depth of the underground buried object 12 (the distance from the surface of the road 15 to the upper surface of the underground buried object 12). By doing so, even when the rotary blade approaches from directly above the protection area of the road 15, the buried object protective tool 100 is effectively attached to the rotary blade before the rotary blade comes into contact with the underground buried object 12. It can be brought into contact with each other, and the installation structure 10 can exhibit higher protection performance. As an example of this embodiment, the diameter of the rotary blade is 550 mm, the depth of the upper surface of the underground buried object 12 is 200 mm, and based on these conditions, the first length of the buried object protective tool 100 Is about 600 mm, the second length is about 300 mm, one side of the rectangular cross section of the buried object protective device 100 is about 40 mm, and the distance between the parallel buried object protective devices 100 is about 300 mm. It was decided.

As shown in FIG. 10, each buried object protective device 100 is installed between the pavement material 18 and the underground buried object 12. More specifically, the buried object protective device 100 is located above the concrete portion 17 and is buried at a depth adjacent to the lower surface of the pavement material 18. That is, since a part of the outer surface of the buried object protective device 100 faces the ground without the pavement material 18, there is an advantage that it is easy to grasp the place where the buried object protective device 100 is buried during road construction. Further, when constructing the installation structure 10, after laying the underground buried object 12 in the excavated ditch of the roadbed 16 and filling the excavated ditch with the concrete material, the buried object protective device 100 is installed before the concrete material is hardened. By arranging it, there is also an advantage that the buried object protective device 100 can be easily installed at a predetermined position.

Subsequently, a method of constructing the installation structure 10 of the present embodiment will be described. First, the roadbed 16 of the road 15 is excavated to form an excavation ditch as a space for installing the underground buried object 12. Next, the underground buried object 12 is arranged in the excavation ditch of the roadbed 16. Then, in order to form the concrete portion 17 around the underground buried object 12, the concrete material is poured into the excavation groove of the roadbed 16 and filled. Before the concrete material hardens, a plurality of buried object protectors 100 are arranged in a predetermined pattern so as to form a protective area above the underground buried object 12. At this time, by embedding each buried object protective device 100 in the concrete material so that its upper surface is exposed upward, a plurality of buried object protective devices 100 can be arranged based on a predetermined pattern while visually confirming. can. Further, each buried object protective device 100 is arranged so that the arrow of the display unit 107 points upward. After the concrete material is hardened to form the concrete portion 17, the installation structure 10 can be constructed by forming a layer of the pavement material 18 on the upper surfaces of the roadbed 16 and the concrete portion 17.

The buried object protective device of the present invention may be used as a buried object protective device in which a plurality of buried object protective devices are combined on a substrate. The buried object protection device 11 according to the embodiment of the present invention will be described with reference to FIGS. 11 to 14. 11 (a) and 11 (b) are schematic perspective views seen from above and below the buried object protection device 11. 12 (a) to 12 (c) are a plan view, a front view, and a bottom view of the buried object protection device 11. FIG. 13 is a cross-sectional view taken along the line FF of the buried object protection device 11. FIG. 14 is an exploded perspective view of the buried object protection device 11.

As shown in FIGS. 11 and 12, the buried object protective device 11 includes a plurality of buried object protective devices 100 formed in a cylindrical shape, a substrate 120 extending in a plane shape, and the buried object protective device 100 as a substrate 120. It is provided with a plurality of fixing members 130 for fixing to. As shown in FIG. 14, a plurality of buried object protective devices 100 are arranged on the upper surface of the substrate 120, and each buried object protective device 100 is fixed by a plurality of fixing members 130, whereby the buried object protective device 11 is provided. It is assembled. Hereinafter, each component of the buried object protection device 11 will be described.

The substrate 120 constituting the buried object protection device 11 is a rectangular plate having a long side and a short side. 15 (a) and 15 (b) are schematic perspective views of the substrate 120 as viewed from above and below. 16 (a) to 16 (c) are a plan view, a front view, and a bottom view of the buried object protection device 11. The substrate 120 has an upper surface that is arranged to face the ground side and a lower surface that is arranged to face the underground side. In the present embodiment, the substrate 120 is made of a hard and high-strength synthetic resin material having strength enough to withstand the impact of a civil engineering work tool such as a pickaxe. Alternatively, the substrate 120 may be a steel plate instead of the synthetic resin material. The substrate 120 may function in place of or together with the concrete portion to protect the underground buried object by covering the underground buried object from the above-ground side.

As shown in FIGS. 15 and 16, the substrate 120 is provided with a plurality of fixing holes 121 for fixing the plurality of buried object protective devices 100. In the present embodiment, the plurality of fixing holes 121 fix the four buried object protective devices 1001 and 1002 to the four sides and fix one buried object protective device 1002 to the center of the substrate 120 in parallel with the short side. Is located in. Further, the substrate 120 includes a connecting mechanism for connecting adjacent substrates 120, 120 (having the same shape as itself). The connecting mechanism is configured so that the buried object protective equipment 100, 100 can be aligned in a straight line over the adjacent substrates 120, 120. More specifically, the connecting mechanism accommodates the connecting piece 122 protruding from the outer periphery of the substrate 100 and the claw portion of the connecting piece 122 of the other buried object protection device 11, and locks the connecting piece 122 in the protruding direction. It has a locking groove 123 and a locking groove 123. The connecting piece 122 is formed on one of the long sides of the pair of long sides of the substrate 120 and the short side of one of the pair of short sides. The locking groove 123 is formed on the other long side and the other short side of the substrate 120. The connecting piece 122 extends from the outer periphery of the substrate 120 and has a claw portion bent toward the upper surface at the tip thereof. The locking groove 123 is formed as a narrow groove recessed in the lower surface in the vicinity of the edge of the substrate 120. The locking groove 123 has a slit width capable of accommodating the claw portion of the connecting piece 122. Since the hook-shaped connecting piece 122 is polymerized in the locking groove 123 in the vertical direction, it is difficult for the two to be separated from each other. Further, the locking groove 123 has a predetermined slit length so as to slidably accommodate the connecting piece 122 in a direction orthogonal to the projecting direction (slit length direction). That is, the connecting mechanism can connect one buried object protection device 11 to another buried object protection device 11 and align the buried object protection device 11 in a straight line. Alternatively, if necessary, the connecting piece 122 can be slid along the slit length in the locking groove 123 to displace the adjacent buried object protection device 11 in the orthogonal direction.

As shown in FIG. 14, the fixing member 130 is composed of a saddle-shaped support metal fitting 131, a bolt 132, and a nut 133. The support metal fitting 131 has a U-shaped support portion 131a that restrains the buried object protective device 100 from above, and a fixing portion 131b that is fixed to the substrate 120. As shown in FIG. 13, the shaft of the bolt 132 fixes the fixing hole 121 of the substrate 120 and the supporting metal fitting 131 in a state where the supporting portion 131a of the supporting metal fitting 131 covers the buried object protective tool 100 arranged on the substrate 120. The buried object protective device 100 is fixed to the upper surface of the substrate 120 by penetrating the portion 131b from the lower surface side and screwing the nut 133 from the upper surface side of the substrate 120 to the shaft tip of the bolt 132. In other words, the operator can operate the fixing member 130 from the upper surface side of the substrate 120 to attach / detach the buried object protective device 100 to / from the substrate 120.

Based on the above description, the overall configuration of the buried object protection device 11 will be described in more detail. In the buried object protective device 11 of the present embodiment, as shown in FIGS. 11 and 12, each buried object protective device 100 is fixed only to the upper surface of the substrate 120 via the fixing member 130. That is, by arranging the buried object protective tool 100 on the upper surface of the substrate 120, the rotary blade of the road cutter approaching from the ground is brought into contact with the outer surface of the buried object protective device 100 preferentially over the substrate 120, and the rotary blade is used. Damage to the substrate 120 is suppressed. As shown in FIG. 13, the open ends of the sheet member 101 having a substantially U-shape or a substantially V-shape are arranged so as to face upward of the substrate 120. Further, the buried object protective device 100 is fixed to each side of the substrate 120 so as to surround the rectangular outer circumference of the substrate 120 without any gap. In other words, at least a part of the plurality of buried object protective equipment 100 is arranged so that the cylinder axes are parallel to each other. Specifically, on each long side of the substrate 120, a relatively long first buried object protective device 1001 (having a length corresponding to the long side of the substrate 120) is arranged, and on each short side, a relatively long first buried object protective device 1001 is arranged. Is arranged with a relatively short second buried object protector 1002 (having a length corresponding to the short side of the substrate 120). A second buried object protective device 1002 is additionally arranged in the middle of the second buried object protective device 1002 arranged on both short sides. That is, on the upper surface of the substrate 120, two closed lattices are formed by a plurality of (five in this embodiment) buried object protective equipment 100. That is, in the buried object protection device 11, since the first buried object protective device 1001 and the second buried object protective device 1002 are assembled in a grid pattern without gaps, the rotary blade of the road cutter travels straight from the outside. It has an array structure configured so that the rotary blade always passes through the buried object protective device 100 when entering the substrate 120. Therefore, the buried object protection device 11 can be installed above the underground buried object (s) and can form a protective area for protecting the underground buried object 12 over a predetermined range.

Further, the dimensional shape of the substrate 120 and the fixing position of the buried object protective device 100 are defined so that the distance between the buried object protective devices 100 is equal to or less than the diameter of the rotary blade of the road cutter. More preferably, the distance on the diagonal line of one grid of the buried object protective device 100 installed on the substrate 120 is designed to be equal to or less than the diameter of the rotary blade of the road cutter. Further, it is preferable that the distance between the buried object protective equipment 100 is determined according to the burial depth of the underground buried object (distance from the road surface to the upper surface of the underground buried object). By doing so, even when the rotary blade approaches from the protection area of the road or directly above the substrate 120, the buried object protective tool 100 is effectively attached to the rotary blade before the rotary blade comes into contact with the underground buried object. The buried object protection device 11 can exhibit higher protection performance. Further, the substrate 120 is formed to be thinner than the cross-sectional dimension of the buried object protective tool 100 in consideration of weight reduction and improvement in handleability. In particular, since the substrate 120 is made of a relatively thin synthetic resin material, it is lighter than the case where a concrete plate is used. As an example of this embodiment, it is assumed that the diameter of the rotary blade is 550 mm and the depth of the upper surface of the underground buried object 12 is 200 mm, and based on these conditions, the thickness of the substrate 120 is about 15 mm. The long side of the substrate 120 is about 600 mm, the first length of the buried object protector 100 is about 600 mm, the short side of the substrate 120 is about 380 mm, and the second length is about 300 mm. It was determined that one side of the rectangular cross-section of the buried object protective device 100 is about 40 mm, and the distance between adjacent buried object protective devices 100 is about 300 mm.

That is, in the buried object protecting device 11 according to the present embodiment, since a plurality of longitudinal buried object protecting devices 100 are fixed to the substrate 120, the rotary blade of the road cutter traveling straight is used as the buried object protecting device 100. Can be caught by the side and effectively protect the underground buried object 12. Therefore, in the buried object protection device 11 of the present embodiment, the substrate 120 is covered without spreading the buried object protective device 100 (for example, a steel plate, a high-strength fiber sheet) over the upper region of the underground buried object 12 as in the conventional case. By simply installing it in the area, the buried object protective device 100 assembled in a closed frame shape makes it possible to easily and efficiently define the protected area of the underground buried object 12 inside each side.

Next, the second installation structure 10'by the buried object protection device 11 will be described with reference to FIGS. 17 to 19. The installation structure 10'is a structure in which a plurality of buried object protection devices 11 are installed underground in the road 15 in order to protect the underground buried object 12 buried underground in the road 15 from the rotary blade X of the road cutter. .. FIG. 17 is a schematic plan view of the installation structure 10'. 18 and 19 are a cross-sectional view taken along the line GG and a cross-sectional view taken along the line HH.

In the installation structure 10'of the present embodiment, as shown in FIGS. 17 to 19, the road 15 includes a roadbed 16 forming an underground layer with crushed stone or soil, a backfill portion 19 made of sand or high-quality soil, and the like. It is composed of a pavement material 18 forming the surface layer of the road 15. Further, in the present embodiment, similarly, the underground buried object 12 is exemplified as two wiring / piping materials laid in the ground. In the installation structure 10', a long underground buried object 12 such as wiring and piping material is laid in the excavated ditch of the roadbed 16, and then sand or good quality is provided in the excavated ditch to cover and protect the underground buried object 12. The soil is filled to form the backfill portion 19. Then, in order to protect the underground buried object 12 from civil engineering work tools such as a road cutter and a pickaxe during the excavation work of the road 15, a plurality of buried object protection devices 11 are buried in the ground. In each buried object protective device 11, the buried object protective device 100 is arranged so that the U-shaped or V-shaped open end of the seat member 101 in a bent posture faces the ground side.

The plurality of buried object protection devices 11 are arranged linearly above the underground buried object 12 extending longitudinally in the arrangement direction in the plan view shown in FIG. The plurality of buried object protection devices 11 are spread without gaps along the arrangement direction. Further, a plurality of buried object protective devices 100 (second buried object protective device 1002) are continuously arranged in a straight line without interruption along the arrangement direction of the underground buried object 12. Further, a plurality of buried object protective devices 100 (first buried object protective device 1001) are arranged in parallel along a direction orthogonal to the arrangement direction (hereinafter, referred to as an orthogonal direction). That is, in the installation structure 10'of this embodiment, a protective area for protecting the underground buried object 12 from the rotary blade of the road cutter traveling straight is constructed by arranging the plurality of buried object protective tools 100 in a predetermined pattern. There is. Since the first buried object protective tool 1001 and the second buried object protective device 1002 are assembled in a grid pattern without gaps in the installation structure 10', the rotary blade of the road cutter travels straight from the outside. The rotary blade is configured to always pass through the buried object protective device 100 when entering the inside of the protected area.

Further, as shown in FIG. 18, the buried object protection device 11 is arranged directly under the pavement material 18, and as a result, each buried object protective device 100 is installed between the pavement material 18 and the underground buried object 12. There is. More specifically, the buried object protection device 11 is located above the roadbed 16 in the upper layer of the backfill portion 19, and the upper surface of the buried object protective device 100 is buried at a depth adjacent to the lower surface of the pavement material 18. There is. That is, since a part of the outer surface of the buried object protective device 100 faces the ground without the pavement material 18, there is an advantage that it is easy to grasp the place where the buried object protective device 100 is buried during road construction. Further, as shown in FIG. 18, the substrate 120 functions to protect the underground buried object 12 from civil engineering tools such as a pickaxe by covering the underground buried object 12 from the ground side instead of the concrete portion. .. Therefore, in the installation structure 10'of this embodiment, the buried object protective device 100 and the substrate 120 cooperate to effectively protect the underground buried object 12. Further, as shown in FIG. 19, each buried object protection device 11 is continuously provided to the buried object protection device 11 adjacent in the arrangement direction via a connecting mechanism (connecting piece 122 and locking groove 123). There is. By connecting the plurality of buried object protection devices 11 using the connecting mechanism, it is possible to easily align the plurality of buried object protection devices 11 and the buried object protection device 100 in a straight line. In the illustrated example, the substrates 120 and 120 are connected to each other via a connecting mechanism formed on the long side of the substrate 120, but instead of or in addition to this, the short side The substrates 120 and 120 may be connected via the formed connecting mechanism. Alternatively, the substrates 120 and 120 may be connected to each other in an arbitrary pattern by alternately using the connection mechanism on the long side and the connection mechanism on the short side.

Subsequently, a method of constructing the second installation structure 10'of the present embodiment will be described. First, the roadbed 16 of the road 15 is excavated to form an excavation ditch as a space for installing the underground buried object 12. Next, the underground buried object 12 is arranged in the excavation ditch of the roadbed 16 while filling the excavation ditch with sand or high-quality soil. Then, sand or high-quality soil is filled on the underground buried object 12 to form the backfill portion 19. Next, the roadbed material excavated above the backfill portion 19 is refilled. A plurality of buried object protection devices 11 are arranged while being linearly connected along the arrangement direction of the underground buried object 12 so as to form a protective area above the underground buried object 12. Since the connecting mechanism allows the substrates 120 to be displaced in the orthogonal direction, the operation of connecting the substrates 120 to each other becomes easy. After arranging the plurality of buried object protection devices 11 on the underground buried object 12, the roadbed material is put on the substrate 120 so that the upper surface of each buried object protective device 100 is exposed upward. Then, the installation structure 10'can be constructed by forming a layer of the pavement material 18 on the upper surface of the roadbed 16.

FIG. 20 shows another usage example of the buried object protective device 100 of the present embodiment. As shown in FIG. 20, the buried object protective device 100 may be integrated with a trough 13 capable of forming an electric wire utility tunnel in the basement of the road and accommodating the electric wires 12 inside. Here, the electric wires inside the trough 13 correspond to the underground buried object 12. The trough 13 is composed of a trough body 13a and a trough lid 13b. A plurality of buried object protective devices 100 are integrally fixed to the upper surface of the trough lid 13b corresponding to the substrate. That is, in the trough 13, the plurality of buried object protective equipment 100 and the trough lid 13b can function as the above-mentioned buried object protective device 11. Therefore, the trough 13 can protect the internal electric wires from the rotary blade of the road cutter by providing the buried object protection device 11 or the buried object protective device 100.

Hereinafter, the action and effect of the buried object protective device 100 according to the embodiment of the present invention will be described.

According to the buried object protective device 100 of the present embodiment, when the road cutter comes into contact with the buried object protective device 100, the rotary blade of the road cutter cuts the rigid outer shell member 104 and cuts open the inner shell member 103 to form a sheet. After reaching the member 101, the unrestrained sheet member 101 is entangled by the rotary blade to reach the cut of the outer shell member 104, and further, while being pulled out to the outside, is entangled with the rotary blade to rotate the rotary blade. Stop it. In the buried object protective device 100, since the tubular member 102 has a double tubular structure, a slight time difference occurs between the rotary blade cutting the outer shell member 104 and the inner shell member 103 being cut. In addition to this time difference, a gap is formed between the inner shell member 103 and the outer shell member 104, so that the sheet member 101 is entangled with the rotary blade until it reaches the cut of the outer shell member 104. It is possible to secure a longer time or distance and increase the amount of entanglement of the sheet member 101 with the rotary blade in the stage before the sheet member 101 is pulled out from the cut. Further, the seat member 101 is bent into a substantially U-shape or a substantially V-shape and housed in the inner shell member 103 in a cross-sectional view of the buried object protective device 100, and the seat member 101 has a substantially U-shape or a substantially V-shape. The open end of the character shape is arranged so as to face the ground side. As a result, the rotary blade that comes into contact with the buried object protective device 100 from above comes into contact with the open end having a substantially U-shape or a substantially V-shape, and the sheet member 101 is wound around the rotary blade while being developed in a straight line to form an outer shell. It can be easily pulled out from the cut of the member 104. That is, according to the buried object protective device 100 of the present embodiment, the sheet member 101 is effectively wound up inside the outer shell member 104 by the rotary blade, so that the sheet member does not use a concrete exterior material. The 101 can be pulled out more reliably from the cut of the outer shell member 104. Further, the buried object protective device 100 of the present embodiment is lighter, more compact and easier to handle than the conventional concrete exterior material because the outer shell member 104 is thinner than the inner shell member 103. It is configured in. Therefore, the buried object protective device 100 of the present embodiment is lightweight, compact, and easy to handle, and also exhibits the protective function of the underground buried object 12 with higher accuracy.

The present invention is not limited to the above-described embodiment, and various embodiments and modifications can be taken. Hereinafter, modifications of the present invention will be described. In each embodiment or modification, the components having the same last two-digit code number have the same or similar characteristics unless otherwise specified, and some description thereof will be omitted.

(1) In the buried object protective device of the present invention, the buried object protective device is not limited to the embodiment of the above embodiment. The buried object protective device 200 of another embodiment will be described with reference to FIGS. 21 to 25. Similar to the above embodiment, the buried object protective device 200 is interposed between the pavement material and the underground buried object, and when the road cutter that cuts the pavement material comes into contact with the buried object protective device 200, the road cutter It stops the operation directly or indirectly. FIG. 21 is a schematic perspective view of the buried object protective device 200. 22 (a) and 22 (b) are a front view and a plan view of the buried object protective device 200. 23 (a) and 23 (b) are a cross-sectional view of II and a vertical cross-sectional view of JJ of the buried object protective device 200. 24 and 25 are schematic views showing a mode in which the underground buried object is protected from the rotary blade of the road cutter by the buried object protective tool 200.

As shown in FIGS. 21 to 23, the buried object protective device 200 is a long body having a square bar-shaped outer shape extending at a predetermined length. The buried object protective device 200 includes a seat member 201, a bag member 205 that surrounds the seat member 201, a hollow cylindrical tubular member 202 that houses the seat member 201, and both ends of the tubular member 202. A closing member 206 for closing is provided. Here, since the configurations of the seat member 201, the bag member 205, and the closing member 206 are the same as those of the buried object protective device 100, the description thereof will be omitted. The tubular member 202 is a non-metal (specifically, synthetic resin) square cylindrical body that extends at a predetermined length and is open at both ends. The cylindrical member 202 may be a round tubular body. The seat member 201 sealed in the bag member 205 is housed inside the tubular member 202 in an unrestrained state. The seat member 201 is configured to come into contact with the inner surface of the cylinder wall of the cylinder member 202. The seat member 201 is bent in a substantially U-shape or a substantially V-shape so as not to roll in the circumferential direction inside the tubular member 102 while maintaining the bent posture due to the stiffness (stiffness or elasticity) of the seat member 201. It is being held. The buried object protective device 200 is preferably installed so that the open end of the seat member 201 having a substantially U-shape or a substantially V-shape faces upward. The tubular member 202 may be made of a metal material such as a steel plate having a rigidity enough to delay the rotation when it comes into contact with the rotary blade of the road cutter and having a relatively high rigidity.

Next, with reference to FIGS. 24 and 25, a mode in which the operation of the road cutter is stopped by the buried object protective tool 200 when the rotary blade X of the road cutter comes into contact with the buried object protective tool 200 will be described. In the above description, the buried object protective device 200 is exemplifiedly fixed to the upper surface of the substrate 220 as a part of the buried object protective device 21, and is directly under the pavement material 28 that paves the surface of the road 25 and the underground buried object 22. It is buried above.

When the rotary blade X of the road cutter goes straight while cutting the pavement material 28 and invades the protective area above the underground buried object 22, the rotary blade X comes into contact with the buried object protective tool 200. As shown in FIG. 24, the rotary blade X comes into contact with the upper corner portion of the tubular member 202 of the buried object protective device 200 and cuts the meat portion thereof. When the rotary blade X reaches the inside of the tubular member 202, the rotary blade X comes into contact with the seat member 201 in the unrestrained state. At this time, since the rotary blade X generally comes into contact with the seat member 201 from diagonally above (ground side), the U-shaped or V-shaped open end of the seat member 201 that faces upward rotates first. Can come into contact with blade X. At the same time as this contact, the bag member 205 is immediately broken, and the sheet member 201 begins to be entangled with the rotary blade X. It is conceivable that the seat member 201 is entwined with the rotary blade X while being developed from a U-shaped or V-shaped bent posture. Then, as shown in FIG. 25, while the sheet member 201 is entangled with the rotary blade X, it is pulled out through the cut of the tubular member 202 before the tubular member 202 is completely cut. Then, when the sheet member 201 is pulled out to the outside and entangled with the rotary blade X, the frictional resistance of the rotary blade X suddenly increases and the rotary blade X stops, or the operator has an abnormality in the rotary blade X. Alternatively, it is possible to notice the change in the state and urge the road cutter to stop operating. As a result, the operator can notice that the rotary blade X of the road cutter has invaded the protected area of the underground buried object 22 and can avoid damage to the underground buried object 22.

Therefore, the buried object protective device 200 of the present embodiment is compared with the conventional configuration due to the effect of the bag member 205 preventing the seat member 201 from getting wet and the bending posture of the seat member 201 inside the tubular member 202. At least, it exerts the protective function of underground buried objects with higher accuracy.

(2) The configuration of the tubular member of the buried object protective device of the above embodiment is not limited to the above embodiment. For example, the tubular member of the buried object protective device of the present invention may be any combination such as a combination of a square inner shell member and a square outer shell member, a combination of a round inner shell member and a round outer shell member, and the like. It may be selected from shapes and may take various forms in detail.

The buried object protective device 300 of FIG. 26A includes a tubular member 302 composed of a square inner shell member 303 and a square outer shell member 304. The seat member 301 is housed inside the tubular member 302 in an unrestrained state. In the tubular member 302, the inner shell member 303 and the outer shell member 304 are not connected to each other, and the inner shell member 303 can freely move inside the outer shell member 304. Then, the inner shell member 303 is placed on the bottom wall of the outer shell member 304. Due to the difference in the cross-sectional view dimensions of the inner shell member 303 and the outer shell member 304, when the buried object protective device 300 is placed, a gap is formed between the outer surface of the inner shell member 303 and the inner surface of the outer shell member 304 in the upper part of the cross-sectional view. It is formed. In other words, a gap is formed between the outer surface of the inner shell member 303 and the inner surface of the outer shell member 304 on the outer surface of the inner shell member 303 facing the ground side. That is, the buried object protective device 300 can exert the protective function of the underground buried object as in the above embodiment due to the voids formed in a part in the circumferential direction. The end of the tubular member 302 may be closed or may be open.

Further, the buried object protective device 400 shown in FIG. 26B includes a tubular member 402 including a triangular inner shell member 403 and a circular outer shell member 404. The seat member 401 is housed inside the tubular member 402 in an unrestrained state. In the tubular member 402, the inner shell member 403 and the outer shell member 404 are fixed to each other by contacting each apex of the triangle of the inner shell member 403 with the inner surface of the outer shell member 404. A gap is formed between the outer surface of the inner shell member 403 and the inner surface of the outer shell member 404 at a location other than the contact point in the circumferential direction. That is, the buried object protective device 400 can exert the protective function of the underground buried object as in the above embodiment due to the voids formed in a part in the circumferential direction.

(3) The material of each component of the buried object protective device of the above embodiment is not limited to the above embodiment, and the material can be changed as long as it is included in the technical scope of the present invention.

(4) In the buried object protective device of the present invention, the bag member may be omitted. However, when the bag member is labor-saving, it is preferable that the internal space of the tubular member is kept watertight. This is to prevent deterioration of the sheet member due to water immersion, or to reduce the possibility that the sheet member slips against the rotary blade of the road cutter and becomes difficult to get entangled.

(5) In the buried object protective device of the present invention, the seat member does not have to be housed inside the tubular member in a substantially U-shaped or substantially V-shaped bent posture. For example, the sheet member may extend in a straight line in a cross-sectional view. Further, the display unit may be omitted.

(6) In the installation structure of the above embodiment, the buried object protective device or the buried object protective device is buried above the underground buried object and under the pavement material, but the installation position of the buried object protective device is not limited to this. .. The buried object protective device or the buried object protective device may be installed on the ground side or above the underground buried object. For example, even if it is placed on the road surface, the underground buried object can be similarly protected from the road cutter. It is possible.

(7) In the installation structure of the above embodiment, the underground buried object is a long body such as wiring and piping material, but the embodiment is not limited to this embodiment. For example, the underground buried object may be a box-shaped underground structure that houses telecommunications equipment underground.

(8) In the buried object protective device of the above embodiment, the display portion is formed on the outer surface of the closed portion of the closing member, but the present invention is not limited to the above embodiment. For example, the display unit may be formed on the outer surface of the tubular member. Further, the display unit is not limited to the arrow shape as in the above embodiment, and may take any form as long as the orientation of the seat member can be visually displayed.

The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various embodiments as long as it belongs to the technical scope of the present invention.

10 Buried object installation structure 11 Buried object protection device 12 Underground object protection device 12 Underground object 15 Road 16 Roadbed 17 Concrete part 18 Pavement material 19 Backfilling part 100 Buried object protective equipment 101 Sheet member 102 Cylinder member 103 Inner shell member (cylinder member)
104 Outer shell member (cylinder member)
105 Bag member 106 Closing member 106a Closing part 106b First connecting part 106c Second connecting part 107 Display part 120 Board 121 Fixing hole 122 Connecting piece (connecting mechanism)
123 Locking groove (connecting mechanism)
130 Fixing member 131 Support bracket 131a Support part 132b Fixing part 132 Bolt 133 Nut X Road cutter rotary blade

Claims (16)

A buried object protective device for protecting underground buried objects from road cutters.
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A hollow cylindrical inner shell member that houses the sheet member in an unrestrained state, and
A rigid and hollow cylindrical outer shell member for accommodating the inner shell member is provided.
A buried object protective device characterized in that a gap is formed between the outer surface of the inner shell member and the inner surface of the outer shell member in at least a part of the inner shell member and the outer shell member in the circumferential direction. The buried object protective device according to claim 1, further comprising a waterproof or low water permeability bag member surrounding the sheet member. The buried object protective device according to claim 1 or 2, wherein the gap is formed over the entire circumferential direction of the inner shell member and the outer shell member. The buried object protective device according to any one of claims 1 to 3, wherein the outer shell member is thinner than the inner shell member. The buried object protective device according to any one of claims 1 to 4, wherein the inner shell member is made of synthetic resin, and the outer shell member is made of metal. The buried object protective device according to any one of claims 1 to 5, wherein the end portion of the outer shell member is closed by the closing member. The buried object protection according to claim 6, wherein the end portion of the inner shell member is supported by the closing member so that the outer surface of the inner shell member is separated from the inner surface of the outer shell member in the entire circumferential direction. Ingredients. The buried object protection according to any one of claims 1 to 7, wherein the inner shell member has a substantially circular cross-sectional shape, and the outer shell member has a substantially rectangular cross-sectional shape. Ingredients. The method according to any one of claims 1 to 8, wherein the sheet member is bent into a substantially U-shape or a substantially V-shape and housed in the inner shell member in a cross-sectional view. Buried object protective equipment. A buried object protective device for protecting underground buried objects from road cutters.
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A waterproof or low water permeability bag member that surrounds the sheet member,
A tubular member that houses the seat member inside in an unrestrained state is provided.
A buried object protective device characterized in that the sheet member is bent into a substantially U-shape or a substantially V-shape and housed in the inner shell member in a cross-sectional view. The buried object protective device according to claim 9 or 10, wherein the sheet member is held inside the inner shell member so as not to roll in the circumferential direction. The buried object protective device according to any one of claims 9 to 11, further comprising a display unit for displaying the direction of the bent posture of the sheet member to the outside. A buried object protective device for protecting underground buried objects from road cutters.
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A waterproof or low water permeability bag member that surrounds the sheet member,
A hollow cylindrical synthetic resin inner shell member that houses the sheet member in an unrestrained state, and
A rigid and hollow cylindrical metal outer shell member for accommodating the inner shell member is provided.
The outer shell member is a buried object protective device characterized in that the outer shell member is thinner than the inner shell member. It is an installation structure with buried object protective equipment to protect underground buried objects from road cutters.
The buried object protective equipment
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A hollow cylindrical inner shell member that houses the sheet member in an unrestrained state, and
A rigid and hollow cylindrical outer shell member for accommodating the inner shell member is provided.
An installation structure characterized in that a gap is formed between the outer surface of the inner shell member and the inner surface of the outer shell member on the outer surface of the inner shell member facing at least the ground side. It is an installation structure with buried object protective equipment to protect underground buried objects from road cutters.
The buried object protective equipment
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A hollow cylindrical inner shell member that houses the sheet member in an unrestrained state, and
A rigid and hollow cylindrical outer shell member for accommodating the inner shell member is provided.
The sheet member is bent into a substantially U-shape or a substantially V-shape and housed in the inner shell member in a cross-sectional view of the buried object protective device, and the sheet member has a substantially U-shape or a substantially V-shape. The installation structure is characterized in that the open end of the is arranged so as to face the ground side. It is an installation structure with buried object protective equipment to protect underground buried objects from road cutters.
The buried object protective equipment
A sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of the road cutter.
A waterproof or low water permeability bag member that surrounds the sheet member,
A tubular member that houses the seat member inside in an unrestrained state is provided.
The sheet member is bent into a substantially U-shape or a substantially V-shape and housed in the tubular member in a cross-sectional view of the buried object protective device, and the seat member has a substantially U-shape or a substantially V-shape. An installation structure characterized in that the open ends are arranged so that they face the ground side.

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