JP2021173010A - Embedded object protecting device - Google Patents

Abstract

To provide an embedded object protecting device that protects an underground embedded object more efficiently.SOLUTION: An embedded object protecting device 11 comprises: one or more protectors 100 of an embedded object that comprise a sheet member constituted to be entangled into a rotary cutter of a road cutter when coming into contact with the rotary cutter and a cylinder member for housing inside the sheet member in a non-restricted state; a base plate 120 that has an upper surface arranged to face the ground side and a lower surface arranged to face the underground side and that covers an underground embedded object from the ground side; and one or more fixing members 130 for fixing the one or more protectors 100 of embedded object to at least one surface of the upper surface and the lower surface in the base plate 120.SELECTED DRAWING: Figure 1

Description

The present invention relates to a buried object protection device for protecting an underground buried object from civil engineering tools such as a road cutter.

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.

Japanese Unexamined Patent Publication No. 2011-211883

In the underground protective equipment of Patent Document 1, since the underground protective equipment is composed of a hollow flat plate-shaped box, when an attempt is made to protect an underground buried object over a wide area, a steel plate and an entire area to be protected are covered. It was necessary to spread the box containing the high-strength fiber sheet. Therefore, the wider the area to be protected, the larger the amount of steel and the high-strength fiber sheet required, the higher the cost, and the problem is that the underground buried object cannot be protected efficiently.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a buried object protection device that protects underground buried objects more efficiently.

The buried object protection device according to claim 1 is a buried object protection device for protecting an underground buried object.
One or more buried object protective devices including a sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of a road cutter, and a tubular member for accommodating the sheet member inside in an unrestrained state. When,
It has an upper surface arranged so as to face the above-ground side and a lower surface arranged so as to face the underground side, and includes a substrate that covers the underground buried object from the above-ground side.
It is characterized in that the one or more buried object protective devices are fixed to at least one surface of the upper surface and the lower surface of the substrate.

The buried object protecting device according to claim 2 is for fixing the one or a plurality of buried object protecting devices to at least one surface of the upper surface and the lower surface of the substrate in the buried object protecting device according to claim 1. The buried object protective device is further provided with one or a plurality of fixing members, and the buried object protective device is fixed to one surface of the substrate, and the fixed object protective device is detachably configured by operating the fixing member from one surface side. It is characterized by being.

The buried object protection device according to claim 3 is the buried object protection device according to claim 1 or 2, and the sheet member is substantially U-shaped or substantially V-shaped in a cross-sectional view of the buried object protective device. Folded into a shape and housed
It is characterized by further including a display unit that displays the direction of the bent posture of the sheet member to the outside.

The buried object protective device according to claim 4 is the buried object protective device according to claim 3, wherein at least a part of the plurality of buried object protective devices is arranged so that the cylinder axes are parallel to each other.
The buried object protective device is fixed to the upper surface of the substrate, and the open end of the sheet member having a substantially U-shape or a substantially V-shape is arranged so as to face upward.

The buried object protection device according to claim 5 is the buried object protection device according to any one of claims 1 to 4, wherein the substrate has a rectangular shape having a long side and a short side, and the substrate is formed. The plurality of buried object protective devices are fixed to each edge of the
A first buried object protective device having a first length corresponding to the long side of the substrate is fixed to the long side of the substrate, and the short side of the substrate corresponds to the short side of the substrate. It is characterized in that a second buried object protective device having a second length is fixed.

The buried object protection device according to claim 6 is the buried object protection device according to any one of claims 1 to 5, wherein the substrate includes a connecting mechanism for connecting adjacent substrates. The connecting mechanism is characterized in that the buried object protective equipment is configured to be able to be aligned in a straight line over adjacent substrates.

The buried object protection device according to claim 7 is the buried object protection device according to claim 6, wherein the connecting mechanism connects a connecting piece protruding from the outer periphery of the substrate and a connecting piece of another buried object protection device. It has a locking groove for accommodating and locking the connecting piece in the projecting direction, and the locking groove is formed so as to slidably accommodate the connecting piece in a direction orthogonal to the projecting direction. It is characterized by.

The buried object protection device according to claim 8 is the buried object protection device according to any one of claims 1 to 7, wherein the tubular member is an inner shell member made of synthetic resin and the inner shell member. It is characterized in that it is composed of a metal outer shell member for interpolating.

According to the buried object protection device according to claim 1, when the rotary blade of the road cutter comes into contact with the tubular member, the rotary blade cuts open the tubular wall of the tubular member and reaches the seat member. The unrestrained seat member 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. Further, in the buried object protective device of the present invention, since one or a plurality of buried object protective devices are fixed to the substrate, the rotary blade of the road cutter traveling straight is received by the buried object protective device at the side, and underground. Buried objects can be protected efficiently. That is, the present invention does not spread the buried object protective equipment (for example, a steel plate, a high-strength fiber sheet) over the upper area of the underground buried object as in the conventional case, but simply installs the substrate in the area to protect the buried object. The area protected by the tool is defined as a side, and the protected area of the underground buried object can be easily and efficiently formed.

According to the buried object protection device according to claim 2, in addition to the effect of the invention of claim 1, the buried object protective device can be easily attached to and detached from the substrate by operating the fixing member from one surface of the substrate. Is possible.

According to the buried object protection device according to claim 3, in addition to the effect of the invention of claim 1 or 2, the seat member takes a substantially U-shaped or substantially V-shaped posture in a cross-sectional view, so that the seat member rotates. When the blades come into contact with each other, the sheet member can be wound around the rotary blade while being developed in a straight line and easily pulled out to the outside. In particular, when the rotary blade comes into contact with the open end having a substantially U-shape or a substantially V-shape, the sheet member can be more easily pulled out from the cut of the tubular member while being developed in a straight line. Further, since 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, the posture of the seat member can be visually grasped.

According to the buried object protection device according to claim 4, in addition to the effect of the invention of claim 3, the rotary blade in contact with the buried object protection device from above hits a substantially U-shaped or substantially V-shaped open end. It is possible to make contact and wind the sheet member around the rotary blade while deploying it in a straight line, and easily pull it out from the cut of the tubular member.

According to the buried object protection device according to claim 5, in addition to the effect of the invention according to any one of claims 1 to 4, a rectangular substrate is provided by the first buried object protective device and the second buried object protective device. It is possible to surround the surroundings and reliably protect the underground buried objects to be protected.

According to the buried object protection device according to claim 6, in addition to the effect of the invention according to any one of claims 1 to 5, the substrates are connected via a connecting mechanism, and the tubular members are aligned in a straight line. , It is possible to protect underground buried objects over a wider area.

According to the buried object protection device according to claim 7, in addition to the effect of the invention of claim 6, the connecting mechanism can connect the substrates by shifting them in a direction orthogonal to the connecting direction, so that a plurality of substrates can be connected. It becomes easy to connect the buried object protection device, and it becomes possible to arrange the buried object protection device in a direction other than the series direction.

According to the buried object protection device according to claim 8, in addition to the effect of the invention according to any one of claims 1 to 7, the tubular member is composed of an inner shell member made of synthetic resin and an outer shell member made of metal. As a result, the rotation speed of the rotary blade can be reduced by the outer shell member, and the sheet member can be reliably entangled by the rotary blade inside the inner shell member. That is, since the buried object protective device is a tubular member having a double tubular structure composed of an inner shell member and an outer shell member, the rotary blade cuts the outer shell member and then cuts the inner shell member to reach the seat member. 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.

(A) A perspective view seen from above and (b) a perspective view seen from below of the buried object protection device according to the embodiment of the present invention. (A) plan view, (b) front view, and (c) bottom view of the buried object protection device of FIG. A cross-sectional view taken along the line AA of the buried object protection device of FIG. A partially exploded perspective view of the buried object protection device of FIG. The schematic perspective view of the buried object protective equipment of the buried object protection device of FIG. (A) front view and (b) plan view of the buried object protective equipment of FIG. BB cross-sectional view of the buried object protective equipment of FIG. (A) CC vertical cross-sectional view and (b) DD vertical cross-sectional view of the buried object protective equipment of FIG. An exploded perspective view of the buried object protective equipment of FIG. 5A is a perspective view from the front, (b) a perspective view from the back, (c) a plan view, (d) a side view, and (e) a sectional view taken along the line EE of the closing member of the buried object protective device of FIG. FIG. 5 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. 5, and shows a stage in which the rotary blade approaches the buried object protective tool and cuts an outer shell member. FIG. 5 is a schematic view showing a mode in which an underground buried object is protected from a rotary blade of a road cutter by the buried object protective tool of FIG. show. (A) A perspective view seen from above and (b) a perspective view seen from below of the substrate of the buried object protection device of FIG. 1. FIG. 13 is a plan view (a), a front view (b), and a bottom view (c) of the substrate of FIG. The schematic plan view of the installation structure by the buried object protection device of one Embodiment of this invention. FIG. 5 is a sectional view taken along line FF of the installation structure of FIG. FIG. 15 is a cross-sectional view taken along the line GG of the installation structure of FIG. The schematic perspective view of the buried object protective equipment of the buried object protection device of another embodiment of this invention. FIG. 18 is a front view (a) and a plan view (b) of the buried object protective device of FIG. FIG. 18 is a cross-sectional view of (a) HH and (b) a vertical cross-sectional view of II of the buried object protective equipment of FIG. FIG. 8 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. 18, and shows a stage in which the rotary blade approaches the buried object protective tool and cuts an outer shell member. FIG. 8 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. 18, and shows a stage in which the rotary blade approaches the buried object protective tool and cuts an outer shell member. Schematic cross-sectional view of the buried object protection device of another embodiment of the present invention. The schematic diagram which shows the modification of the buried object protective equipment in the buried object protection device 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 protection device 11 of the embodiment of the present invention is used to protect underground buried objects such as wiring and piping materials buried under a road pavement material from civil engineering tools such as a road cutter and a pickaxe. Be done. In particular, the buried object protection device 11 of the present embodiment is buried so as to intervene between the pavement material and the underground buried object, and prevents the road cutter that cuts the pavement material from accidentally reaching the underground buried object. It is installed to do. The configuration of the buried object protection device 11 will be described in detail with reference to FIGS. 1 to 4. 1 (a) and 1 (b) are schematic perspective views seen from above and below the buried object protection device 11. 2 (a) to 2 (c) are a plan view, a front view, and a bottom view of the buried object protection device 11. FIG. 3 is a cross-sectional view taken along the line AA of the buried object protection device 11. FIG. 4 is an exploded perspective view of the buried object protection device 11.

As shown in FIGS. 1 and 2, 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. 4, 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. First, each component of the buried object protection device 11 will be described.

The buried object protective device 100 constituting the buried object protective device 11 of the present embodiment is interposed between the pavement material and the underground buried object, and when the road cutter for cutting the pavement material comes into contact with the buried object protective device 100. In addition, it directly or indirectly stops the operation of the road cutter. The configuration of the buried object protective device 100 will be described in detail with reference to FIGS. 5 to 9. FIG. 5 is a schematic perspective view of the buried object protective device 100. 6 (a) and 6 (b) are a front view and a plan view of the buried object protective device 100. FIG. 7 is a cross-sectional view taken along the line BB of the buried object protective device 100. 8 (a) and 8 (b) are a CC vertical cross-sectional view and a DD vertical cross-sectional view of the buried object protective device 100. FIG. 9 is an exploded perspective view of the buried object protective device 100.

As shown in FIGS. 5 to 9, 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. 7, 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 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. 7 and 8, 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. 7 and 8 (b), 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. 10 (a) to 10 (e) are a perspective view from the front, a perspective view from the back surface, a front view, a side view, and an EE 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.

In the buried object protective device 11 of the present embodiment, buried object protective devices 1001 and 1002 having two types of lengths were used. 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.

Next, with reference to FIGS. 11 and 12, 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.

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. 11, 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. 12, 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.

The substrate 120 constituting the buried object protection device 11 of the present embodiment is a rectangular plate having a long side and a short side. 13 (a) and 13 (b) are schematic perspective views of the substrate 120 as viewed from above and below. 14 (a) to 14 (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 to cover and protect the underground buried object from above ground, either in place of or with the concrete layer, which is generally filled to protect the underground buried object.

As shown in FIGS. 13 and 14, 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. 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. The locking groove 123 has a slit width capable of accommodating the claw portion of the connecting piece 122. 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. 4, the fixing member 130 constituting the buried object protection device 11 of the present embodiment 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. 3, 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 device 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 of the present embodiment will be described in more detail. In the buried object protective device 11 of the present embodiment, as shown in FIGS. 1 and 2, 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. 3, 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.

Next, the installation structure 10 by the buried object protection device 11 will be described with reference to FIGS. 15 to 17. 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. 15 is a schematic plan view of the installation structure 10. 16 and 17 are a cross-sectional view taken along the line FF and a cross-sectional view taken along the line GG.

In the installation structure 10 of the present embodiment, as shown in FIGS. 15 to 17, 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 road. It is composed of a pavement material 18 forming a surface layer of 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 ditch of the roadbed 16, and then sand or high-quality soil is placed in the excavated ditch to cover and protect the underground buried object 12. Is filled to form a 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, the installation structure 10 of the present embodiment constructs a protective area that protects the underground buried object 12 from the rotary blade of the road cutter traveling straight by arranging the plurality of buried object protective tools 100 in a predetermined pattern. .. Then, in the installation structure 10, since the first buried object protective tool 1001 and the second buried object protective tool 1002 are assembled in a grid pattern without gaps over the plurality of substrates 120, the rotation of the road cutter is performed. When the blade goes straight and enters the inside of the protective area from the outside, the rotary blade is configured to always pass through the buried object protective tool 100.

Further, as shown in FIG. 16, 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. 16, 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 the present 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. 17, 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 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.

Hereinafter, the operation and effect of the buried object protection device 11 according to the embodiment of the present invention will be described.

According to the buried object protection device 11 of the present embodiment, when the rotary blade of the road cutter comes into contact with the tubular member 102, the rotary blade cuts open the outer wall of the tubular member 102 and reaches the sheet member 101. After that, the unrestrained seat member 101 is entangled by the rotary blade, and is entangled with the rotary blade while being pulled out from the tubular member 102 to stop the operation of the road cutter. Further, in the buried object protecting device 11 of the present embodiment, since the plurality of buried object protecting devices 100 are fixed to the substrate 120, the buried object protecting device 100 receives the rotary blade of the road cutter traveling straight on the side. Therefore, the underground buried object 12 can be efficiently protected. That is, in the present embodiment, the substrate 120 is closed only by installing the substrate 120 in the upper area of the underground buried object without laying the buried object protective equipment (for example, a steel plate, a high-strength fiber sheet) in the entire upper area of the underground buried object as in the conventional case. The protected area of the underground buried object is easily and efficiently defined inside each side by the buried object protective device 100 assembled in a frame shape, and as a result, the protected area of the underground buried object 12 is easily and efficiently defined. It makes it possible to form.

Further, according to the buried object protection device 11 of the present embodiment, in the buried object protective device 100, the tubular member 102 has a double tubular structure, so that after the rotary blade cuts the outer shell member 104, the inner shell member There is a slight time lag before cutting 103. 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, in the buried object protection device 11 of the present embodiment, the outer shell member 104 of the buried object protective device 100 is made thinner than the inner shell member 103, so that it is compared with the one using the conventional concrete exterior material. It is lightweight, compact and easy to handle. Therefore, the buried object protection device 11 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 the buried object protection device of another embodiment will be described with reference to FIGS. 18 to 22. 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. 18 is a schematic perspective view of the buried object protective device 200. 19 (a) and 19 (b) are a front view and a plan view of the buried object protective device 200. 20 (a) and 20 (b) are a cross-sectional view of HH and a vertical cross-sectional view of I-I of the buried object protective device 200. 21 and 22 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. 18 to 20, 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 rigid square cylindrical body that extends at a predetermined length and is open at both ends. The tubular member 202 is 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. However, the tubular member 202 may be made of a relatively soft synthetic wood material. 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 fixed to the upper surface of the substrate so that the open end of the seat member 201 having a substantially U-shape or a substantially V-shape faces upward.

Next, with reference to FIGS. 21 and 22, 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 optionally buried as a part of the buried object protective device 21 directly below the pavement material 28 that paves the surface of the road 25 and above the underground buried object 22.

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. 21, 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. At this time, since the tubular member 202 is made of a rigid material (steel material), the rotation speed of the rotary blade X decreases. 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. 22, 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.

That is, the buried object protecting device protects the substrate in the same manner as the buried object protecting device 11 according to the above embodiment by providing one or more buried object protecting devices 200 on at least one of the upper surface and the lower surface of the substrate. By simply installing it in the area to be protected, the area protected by the buried object protective tool 200 is defined as a side, and the protected area of the underground buried object can be easily and efficiently formed.

(2) FIG. 23 shows a buried object protection device 31 according to another embodiment of the present invention. In the buried object protective device 31 shown in FIG. 23, the buried object protective device 300 may be integrated with a trough 33 capable of forming a common electric wire groove in the basement of the road and accommodating the electric wires 32 inside. Here, the electric wires inside the trough 33 correspond to the underground buried object 32. The trough 33 is composed of a trough body 33a and a trough lid 33b. A plurality of buried object protective devices 300 are integrally fixed to the upper surface of the trough lid 33b corresponding to the substrate. That is, in the trough 33, the plurality of buried object protective devices 300 and the trough lid 33b can function as the above-mentioned buried object protecting device 31. Therefore, the trough 33 can protect the internal electric wires from the rotary blade of the road cutter by providing the buried object protection device 31.

(3) The configuration of the tubular member of the buried object protection 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 is a round tubular member, a combination of a square inner shell member and a square outer shell member, a round inner shell member and a round outer shell member. It may be selected from any shape, such as a combination with, and may take various forms in detail.

The buried object protective device 400 of FIG. 24A includes a tubular member 402 including a square inner shell member 403 and a square 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 not connected to each other, and the inner shell member 403 can move freely inside the outer shell member 404. Then, the inner shell member 403 is placed on the bottom wall of the outer shell member 404. Due to the difference in the cross-sectional view dimensions of the inner shell member 403 and the outer shell member 404, when the buried object protective device 400 is placed, a gap is created between the outer surface of the inner shell member 403 and the inner surface of the outer shell member 404 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 403 and the inner surface of the outer shell member 404 on the outer surface of the inner shell member 403 facing the ground side. 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. The end of the tubular member 402 may be closed or may be open.

Further, the buried object protective device 500 of FIG. 24B includes a tubular member 502 including a triangular inner shell member 503 and a circular outer shell member 504. The seat member 501 is housed inside the tubular member 502 in an unrestrained state. In the tubular member 502, the inner shell member 503 and the outer shell member 504 are fixed to each other by contacting each apex of the triangle of the inner shell member 503 with the inner surface of the outer shell member 504. A gap is formed between the outer surface of the inner shell member 503 and the inner surface of the outer shell member 504 at a location other than the contact point in the circumferential direction. That is, the buried object protective device 500 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.

(4) The material of each component of the buried object protection 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.

(5) In the buried object protection device according to 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.

(6) In the buried object protective device of the buried object protecting device according to 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.

(7) In the installation structure by the buried object protective device 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.

(8) In the installation structure by the buried object protection device 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.

(9) In the buried object protective device of the above embodiment, a plurality of buried object protective devices are arranged on the substrate in a grid pattern, but the present invention is not limited to this. For example, one buried object protective device may be arranged on the substrate of the buried object protective device. Alternatively, the buried object protective equipment may be arranged in a U-shape or an L-shape on the substrate. In such a case, a plurality of buried protection devices can be combined to define a protective area blocked by the buried object protective device.

(10) In the buried object protection device of the above embodiment, the display portion is formed on the outer surface of the closed portion of the closing member of the buried object protective device, 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, the substrate, or the like. 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.

(11) In the buried object protective device of the above embodiment, the buried object protective device is arranged only on the upper surface of the substrate, but may be arranged on the lower surface of the substrate or both sides of the substrate. Further, in the buried object protective device of the above embodiment, the buried object protective device is fixed to the substrate by a fixing member composed of bolts and nuts, but the present invention is not limited to this, and is embedded by, for example, an adhesive. The object protector may be fixed to the substrate.

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 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 (8)

It is a buried object protection device for protecting underground buried objects.
One or more buried object protective devices including a sheet member configured to be entangled with the rotary blade when it comes into contact with the rotary blade of a road cutter, and a tubular member for accommodating the sheet member inside in an unrestrained state. When,
It has an upper surface arranged so as to face the above-ground side and a lower surface arranged so as to face the underground side, and includes a substrate that covers the underground buried object from the above-ground side.
A buried object protection device, wherein the one or a plurality of buried object protective devices are fixed to at least one surface of an upper surface and a lower surface of the substrate. One or more fixing members for fixing the one or more buried object protective devices are further provided on at least one surface of the upper surface and the lower surface of the substrate.
The buried object protective device is fixed to one surface of the substrate, and the fixed object protective device is operated from one surface side so that the buried object protective device can be attached and detached. Buried object protection device described in. The sheet member is folded and housed in a substantially U-shape or a substantially V-shape in a cross-sectional view of the buried object protective device.
The buried object protection device according to claim 1 or 2, further comprising a display unit that displays the direction of the bent posture of the sheet member to the outside. At least a part of the plurality of buried object protective devices is arranged so that the cylinder axes are parallel to each other.
The third aspect of claim 3, wherein the buried object protective device is fixed to the upper surface of the substrate, and the open end of the sheet member having a substantially U-shape or a substantially V-shape is arranged so as to face upward. Buried object protection device. The substrate has a rectangular shape having a long side and a short side, and the plurality of buried object protective devices are fixed to each edge of the substrate.
A first buried object protective device having a first length corresponding to the long side of the substrate is fixed to the long side of the substrate, and the short side of the substrate corresponds to the short side of the substrate. The buried object protecting device according to any one of claims 1 to 4, wherein a second buried object protective device having a second length is fixed. The substrate includes a connecting mechanism for connecting adjacent substrates, and the connecting mechanism is configured so that the buried object protective equipment can be aligned in a straight line over the adjacent substrates. The buried object protection device according to any one of claims 1 to 5, which is characterized. The connecting mechanism has a connecting piece protruding from the outer periphery of the substrate and a locking groove for accommodating the connecting piece of another buried object protection device and locking the connecting piece in the protruding direction. The buried object protection device according to claim 6, wherein the groove is formed so as to slidably accommodate the connecting piece in a direction orthogonal to the projecting direction. According to any one of claims 1 to 7, the tubular member is composed of an inner shell member made of synthetic resin and a metal outer shell member interpolating the inner shell member. The described buried object protection device.

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