JP6691846B2 - Protective plate - Google Patents

Description

  The present invention relates to a protective plate for preventing damage to a long buried material such as a buried cable or a pipeline.

  Conventionally, long materials such as cables (for example, power lines and communication lines) and pipelines (for example, gas pipes and water pipes) are buried in paved ground such as roads and sidewalks. There is. A protective plate for protecting the embedded material from a construction machine (for example, a concrete cutter, a backhoe, etc.) is embedded between the material (hereinafter referred to as an embedded material) and the road surface.

  A plurality of such protective plates are arranged side by side along the longitudinal direction of the embedding material, and a pair of opposite end portions facing each other are thickened portions having a larger thickness than an intermediate portion between the both end portions. Is configured.

  A plurality of protective plates are arranged above the embedding material along the longitudinal direction such that a pair of thickened portions are arranged in the width direction orthogonal to the longitudinal direction so as to be aligned.

  Therefore, for example, when a concrete cutter that moves while cutting the paved ground tries to cross the embedded material, the blade of the concrete cutter hits the thickened portion and the cutting resistance generated on the blade increases. It is said that this allows the worker to know the presence of the embedding material by detecting an abnormality that occurs in the concrete cutter while cutting the thickened portion.

  As described above, it is said that the protective plate can prevent the embedded material from being cut off by making the worker aware of the presence of the embedded material (for example, see Patent Document 1).

JP, 2008-253071, A

  By the way, in the conventional protective plate, since the entire protective plate is made of cast iron having high machinability, the operator does not notice that the protective plate (thickened portion) is being cut, and the blade of the concrete cutter is There is room for improvement because there is a risk that it will reach the buried material.

  In addition, such a protective plate is desired to be lightweight in terms of workability.

  In view of such circumstances, it is an object of the present invention to provide a lightweight protective plate that allows an operator to reliably know the presence of the buried material.

  The protective plate of the present invention is a protective plate that is arranged above the burying material in order to protect a long burying material buried in the ground, and is a metal cover that is arranged above the burying material. Part and a pair of cutting notification parts provided at both ends of the cover part arranged so as to be arranged side by side in the width direction orthogonal to the longitudinal direction of the embedding material, the metal being inferior in cuttability to the cover part. And a cutting notification portion configured, and at least one through hole is formed between the both end portions of the cover portion.

  According to the protective plate having the above configuration, when the pair of cutting notification portions are aligned in the width direction and the cover portion is arranged above the embedded material, the ground is cut. While the moving concrete cutter tries to cross the embedding material, the blade of the concrete cutter hits the cutting announcing section.

  Moreover, since the cutting plate of the protective plate is made of a metal that is inferior in cutting property to the cover part, it is easy for the blade hitting the cutting block to generate a large cutting resistance. It becomes easy to detect an abnormality that occurs in the concrete cutter while cutting the part.

  Further, in the protective plate, since at least one through hole is formed between both ends of the cover part, it is easy to handle because the weight is reduced.

  Moreover, the length of the protective plate of the present invention in the width direction may be changeable.

  According to such a configuration, since the length in the width direction can be changed, even if the embedded material is embedded in a state of being bent in the width direction, the embedded material and both sides of the embedded material in the width direction are included. The area can be easily covered.

  The protective plate of the present invention includes a plurality of connecting plate portions arranged side by side in the width direction, the connecting plate portion having a meshing connecting portion arranged toward adjacent connecting plate portions in the width direction. The meshing connecting portion is configured to mesh with the meshing connecting portion of the connecting plate portions adjacent to each other in the width direction, and the meshing amount of the meshing connecting portions adjacent to each other in the width direction can be changed. Good.

  In the protective plate having the above-described configuration, the length in the width direction of the protective plate can be changed by changing the meshing amount of the meshing connection portions that are adjacent to each other in the width direction. It is possible to change the length of the protective plate in the width direction while maintaining the state where the connecting portions are meshed with each other.

  Therefore, the protective plate can change the length in the width direction without completely separating the connecting plates adjacent to each other in the width direction.

  In this case, the meshing connection portion may be configured to be restricted from moving in the up-down direction while being meshed with the meshing connection portion of the connection plate portions that are adjacent to each other in the width direction.

  With this configuration, even if an external force acts on the connecting plate portion in the vertical direction, the connecting plate portion can be prevented from separating.

  As described above, according to the protective plate of the present invention, the operator can be surely aware of the presence of the buried material, and the excellent effect of being lightweight can be achieved.

FIG. 1 is a plan view of a protective plate according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the protective plate according to the same embodiment, which is a cross-sectional view taken along the line II-II of FIG. 1. FIG. 3 is a cross-sectional view of the protective plate according to the same embodiment, which is a cross-sectional view taken along the line III-III of FIG. 1. FIG. 4 is a cross-sectional view of the protective plate according to the same embodiment, which is a cross-sectional view taken along the line IV-IV of FIG. 1. FIG. 5 is an exploded view of the protective plate according to the same embodiment. FIG. 6 is an explanatory diagram of the work of installing the protective plate according to the embodiment, and is a diagram of a state in which a connecting plate portion of another protective plate is attached to the existing protective plate. FIG. 7: is explanatory drawing of the installation work of the protective plate which concerns on the same embodiment, Comprising: It is explanatory drawing of the state which has attached the connection board part of another protective plate to the existing protective plate. FIG. 8: is explanatory drawing of the installation state of the protective plate which concerns on the same embodiment, Comprising: It is explanatory drawing of the state which arranged several protective plates along the longitudinal direction of an embedding material. FIG. 9: is explanatory drawing of the installation state of the protective plate which concerns on the same embodiment, and is explanatory drawing of the protective plate of the state embedded in the ground.

  Hereinafter, a protective plate according to an embodiment of the present invention will be described with reference to the accompanying drawings. The protective plate according to the present embodiment is a long cable such as a cable (for example, a power line or a communication line) embedded in a paved ground such as a road or a sidewalk, or a pipeline (for example, a gas pipe or a water pipe). This is to protect such a material (hereinafter referred to as a buried material) from a construction machine (for example, a concrete cutter, a backhoe, etc.). That is, the protective plate is arranged above the long embedding material in order to protect the long embedding material.

  As shown in FIG. 1, the protective plate 1 according to the present embodiment is arranged so as to be lined up in a direction orthogonal to the longitudinal direction of the embedding material with a metallic cover portion 2 arranged above the embedding material. It has a pair of cutting notification parts 3 provided at both ends of the cover part 2 and a connecting structure 4 connected to another protective plate 1.

  In the present embodiment, the direction in which the embedding material extends is referred to as the longitudinal direction, and the direction orthogonal to the longitudinal direction and the vertical direction is referred to as the width direction for the following description.

  The cover portion 2 is formed in a rectangular shape (rectangular shape in the present embodiment) in a plan view, and has a pair of side end portions 20 arranged side by side in the width direction, and each of the pair of side end portions 20. It has a pair of adjacent adjacent end portions 21 and a pair of adjacent end portions 21 arranged side by side in the longitudinal direction.

  In addition, the cover portion 2 has a front surface arranged in the buried state toward the ground surface side and a back surface arranged toward the buried material side. Further, the cover portion 2 is formed with a plurality of through holes 22 penetrating the front surface and the back surface.

  The cutting notification unit 3 is continuously provided on the side end 20 of the cover unit 2. Further, the cutting notification portion 3 extends in the same direction as the longitudinal direction (the direction in which the pair of adjacent end portions 21 of the cover portion 2 are arranged). Further, the cutting notification portion 3 has one end in the longitudinal direction adjacent to an engaged portion 41 of the connecting structure 4 which will be described later, while the other end in the longitudinal direction and an engaging portion 40 of the connecting structure 4 which will be described later. Are configured so that a gap S is formed (see FIG. 3).

  As shown in FIG. 2, the thickness of the cutting notification portion 3 is set to be larger than the thickness of the cover portion 2. In addition, in this embodiment, since the upper surface of the cutting notification portion 3 and the upper surface of the cover portion 2 are formed at positions corresponding to or substantially corresponding to each other in the vertical direction, the cutting notification portion 3 corresponds to the position corresponding to the cover portion 2. Has a shape projecting downward.

  As shown in FIG. 3, the connection structure 4 includes an engagement portion 40 that is continuously provided to either one of the adjacent end portions 21 of the cover portion 2 or the other adjacent end portion 21 of the cover portion 2 and one of the cover portions 2. The adjacent end portion 21 or the other adjacent end portion 21 and the engaged portion 41 continuously provided on the other end. In the present embodiment, the engaging portion 40 is continuously provided to one adjacent end portion 21 of the cover portion 2, and the engaged portion 41 is continuously provided to the other adjacent end portion 21 of the cover portion 2.

  The engaging portion 40 projects downward from a position corresponding to one adjacent end portion 21 of the cover portion 2 in the vertical direction, and in the width direction (the direction in which the pair of side end portions 20 of the cover portion 2 are arranged). It extends straight. The engaging portion 40 according to the present embodiment extends over the entire length of the one adjacent end portion 21 of the cover portion 2 in the width direction.

  The engaged portion 41 extends straight in the width direction (the direction in which the pair of side end portions 20 of the cover portion 2 are arranged). Therefore, the engaged portion 41 and the engaging portion 40 are parallel to each other. The engaging portion 40 according to the present embodiment extends over the entire length of the one adjacent end portion 21 of the cover portion 2 in the width direction.

  Further, the engaged portion 41 is formed with a connection groove 410 that opens upward. The connecting groove 410 is formed to be continuous over the entire length of the engaged portion 41 in the longitudinal direction. Therefore, both ends in the longitudinal direction of the engaged portion 41 are open in the width direction.

  The protective plate 1 according to the present embodiment is configured so that the engaging portion 40 can be fitted into the connecting groove 410 of the engaged portion 41 of another protective plate 1. Therefore, the protective plate 1 is configured such that the engaging portion 40 can be connected to the other protective plate 1 by fitting and engaging the engaged portion 41 (the connecting groove 410) of the other protective plate 1. Has been done.

  In this embodiment, the protective plate 1 can change the length in the width direction. As shown in FIG. 1, the protective plate 1 according to this embodiment includes a plurality of connecting plates 5 that can be connected side by side in the width direction, and a connecting structure 6 for connecting the connecting plates 5 to each other.

  The plurality of connecting plates 5 include a pair of outer connecting plates 7 arranged on the outermost side in the width direction, and at least one intermediate connecting plate 8 arranged between the pair of outer connecting plates 7. ing. In this embodiment, the protective plate 1 in which one intermediate connecting plate 8 is arranged between the pair of outer connecting plates 7 will be described.

  As shown in FIG. 5, each of the pair of outer connecting plates 7 is a flat plate-shaped base portion (hereinafter, referred to as an outer base portion) 70 and is connected to the outer base portion 70, and is an intermediate connecting plate in the width direction. A difficult-to-cut portion 71 arranged on the opposite side to 8, and a guide connection structure (hereinafter, referred to as an outer guide connection structure) 72 for connecting the outer connection plate 7 of another protection plate 1 adjacent in the longitudinal direction. Have.

  The outer base portion 70 is made of metal, and may be made of, for example, cast iron, brass, aluminum alloy, or the like. The outer base portion 70 according to the present embodiment includes an end portion (hereinafter referred to as an inner end portion) 700 arranged on the side of the intermediate connecting plate 8 in the width direction and an end located on the opposite side of the inner end portion 700. Portion (hereinafter referred to as outer end portion) 701, a pair of abutting end portions (hereinafter, outer abutting end portions) that are continuous with the inner end portion 700 and the outer end portion 701 and are arranged side by side in the longitudinal direction. ) And 702 and 703.

  Further, the outer base portion 70 is formed with a through hole 704 penetrating in the thickness direction (that is, penetrating across the front surface arranged toward the ground surface side and the back surface arranged toward the embedded material side). ing.

  The hole 704 is formed to have a rectangular shape with rounded corners in a plan view, and the hole diameter becomes smaller toward the central portion side in the thickness direction of the outer base portion 70. Has been done. In addition, a plurality of holes 704 are formed in the outer base portion 70 so as to be arranged at predetermined intervals in the longitudinal direction.

  The difficult-to-cut section 71 is the cutting notification section 3. The difficult-to-cut portion 71 is continuously provided on the outer end portion 701 and extends along the outer end portion 701. Furthermore, one end of the difficult-to-cut portion 71 in the longitudinal direction is adjacent to an outer guide portion 721 of the guide connecting structure, which will be described later, while the other end thereof in the longitudinal direction is between an outer guided portion 720 of the guide connecting structure, which is described later. Are configured so that a gap S is formed.

  The thickness of the difficult-to-cut portion 71 is larger than the thickness of the outer base portion 70. In addition, since the upper surface of the difficult-to-cut portion 71 and the upper surface of the outer base portion 70 are formed at positions corresponding or substantially corresponding to each other in the vertical direction, the difficult-to-cut portion 71 is located below the position corresponding to the outer base portion 70. It has a protruding shape.

  As shown in FIG. 2, the difficult-to-cut portion 71 according to the present embodiment includes a hard-to-cut portion main body 710 made of a metal material having poorer cutting performance than the outer base portion 70, and the hard-to-cut portion main body 710 to the outer base. The connecting portion 711 is connected to the outer end portion 701 of the portion 70.

  The difficult-to-cut portion main body 710 is formed in a rod shape, and is arranged in a state where its longitudinal direction corresponds to the longitudinal direction (the direction in which the outer end portion 701 of the outer base portion 70 extends). The difficult-to-cut portion main body 710 is made of a metal material that is inferior to the outer base portion 70 in machinability, and for example, if made of steel, stainless steel, titanium alloy, or the like. Good.

  The continuous portion 711 is formed integrally with the outer end portion 701, and is formed so as to extend along the outer end portion 701 in the longitudinal direction. Further, the continuous portion 711 is formed so as to enclose the difficult-to-cut portion main body 710. The continuous portion 711 is made of the same metal material as the outer base portion 70.

  As shown in FIG. 5, the outer guide connecting structure 72 includes a guided portion (hereinafter, referred to as an outer guided portion 720) that is continuously provided to either one of the pair of outer abutting end portions 702 and 703. It has a guide part (henceforth an outer guide part 721) connected to the other of the pair of outer abutting end parts 702, 703. In the present embodiment, the outer guided portion 720 is connected to one outer abutting end portion 702 of the outer base portion 70, and the outer guide portion 721 is attached to the other outer abutting end portion 703 of the outer base portion 70. It is lined up.

  As shown in FIG. 3, the outer guided portion 720 protrudes downward from a position corresponding to one outer abutting end portion 702 of the outer base portion 70 in the vertical direction, and extends in the width direction (the outer base portion 70). (A direction in which the pair of side end portions 20 are arranged side by side) extends straight.

  The outer guide portion 721 extends straight in the width direction (the direction in which the pair of side end portions 20 of the outer base portion 70 are arranged). Therefore, the outer guide portion 721 and the outer guided portion 720 are parallel to each other.

  Further, the outer guide portion 721 is formed with a guide groove 721a that opens upward. The guide groove 721a is formed to be continuous over the entire length of the outer guide portion 721 in the longitudinal direction. Therefore, both ends of the outer guide portion 721 in the longitudinal direction are open in the width direction.

  As shown in FIG. 5, each of the intermediate connecting plates 8 connects a flat plate-shaped base portion (hereinafter, referred to as an intermediate base portion) 80 and the intermediate connecting plate 8 of another protection plate 1 adjacent in the longitudinal direction. And a guide connecting structure (hereinafter, referred to as an intermediate guide connecting structure) 81.

  The intermediate base portion 80 is made of metal and may be made of, for example, cast iron, brass, aluminum alloy, or the like, like the outer base portion 70. The thickness of the intermediate base portion 80 is set to be the same or substantially the same as the thickness of the outer base portion 70.

  The intermediate base portion 80 according to the present embodiment is continuous with the pair of side end portions 20 (hereinafter, referred to as intermediate side end portions) 800 and 801, which are arranged in the width direction, and the pair of intermediate side end portions 800 and 801, respectively. And has a pair of contact end portions (hereinafter, referred to as intermediate contact end portions) 802 and 803 arranged in the longitudinal direction.

  Further, the intermediate base portion 80 is formed with a through hole 804 penetrating in the thickness direction (that is, penetrating across the front surface arranged toward the ground surface side and the back surface arranged toward the embedded material side). ing.

  The hole 804 formed in the intermediate base portion 80 is also formed so as to have a rectangular shape with rounded corners in a plan view, and as it approaches the central portion side in the thickness direction of the intermediate base portion 80. It is formed so that the hole diameter is small. In addition, a plurality of holes 804 are formed in the intermediate base portion 80 so as to be aligned in the longitudinal direction and the width direction. That is, the plurality of holes 804 are formed in the intermediate base portion 80 so as to be arranged in multiple rows and multiple columns.

  In the protective plate 1 according to the present embodiment, the through holes 22 are the holes 704 in the outer base portion 70 and the holes 804 in the intermediate base portion 80. Therefore, in the protective plate 1, the through holes 22 are arranged in multiple rows and multiple columns when the pair of outer connecting plates 7 and the intermediate connecting plate 8 are connected to each other.

  The intermediate guide connection structure 81 includes a guided portion (hereinafter, referred to as an intermediate guided portion) 810 that is continuously provided to either one of the pair of intermediate abutting end portions 802 and 803, and a pair of the intermediate abutting end portions. A guide portion (hereinafter, referred to as an intermediate guide portion) 811 that is continuously provided to the other one of 802 and 803. In the present embodiment, the intermediate guided portion 810 is connected to one intermediate contact end portion 802, and the intermediate guide portion 811 is connected to the other intermediate contact end portion 803.

  The intermediate guided portion 810 projects downward from a position corresponding to one intermediate abutting end portion 802 of the intermediate base portion 80 in the vertical direction, and is in the width direction (the pair of side end portions 20 of the intermediate base portion 80). The direction is straight).

  The intermediate guide portion 811 extends straight in the width direction (the direction in which the pair of side end portions 20 of the intermediate base portion 80 are arranged). Therefore, the intermediate guide portion 811 and the intermediate guided portion 810 are parallel to each other.

  A guide groove 811a that opens upward is formed in the intermediate guide portion 811. The guide groove 811a is formed to be continuous over the entire length of the intermediate guide portion 811 in the longitudinal direction. Therefore, the guide groove 811a is formed so as to be open at both ends of the intermediate guide portion 811 in the width direction.

  The connection structure 6 is a meshing connection portion provided on one of the outer connection plate 7 (the inner end portion 700 of the outer connection plate 7) or the outer connection plate 7 (the inner end portion 700 of the outer connection plate 7) that are adjacent in the width direction. (Hereinafter, referred to as a first mesh connection portion) 60 and the outer connection plate 7 (the inner end portion 700 of the outer connection plate 7) or the outer connection plate 7 (the inner end portion 700 of the outer connection plate 7) adjacent to each other in the width direction. And a meshing connection portion (hereinafter referred to as a second meshing connection portion) 61 provided on the other side of the.

  As shown in FIG. 4, the first meshing connection portion 60 includes a first lower receiving portion 600 that engages with the second meshing coupling portion 61 from below, and an upper side relative to the second meshing coupling portion 61. The first stacking portion 601 that engages with the first engagement portion 601 and the retaining portion 602 that engages with the second engagement coupling portion 61 from the upper side and the lower side.

  The first lower receiving part 600 is formed so that the dimension in the width direction becomes shorter from the lower side to the upper side. Therefore, the first lower receiving portion 600 is a pair of upward engaging surfaces 600a formed at both ends in the width direction, and the first lower receiving portion 600 has a central side as it goes from the lower side to the upper side. It has a pair of upward engaging surfaces 600a that are inclined toward.

  The first stacking portion 601 is formed so that the dimension in the width direction becomes shorter from the lower side to the upper side. Therefore, the first stacking portion 601 is a pair of downward engaging surfaces 601a formed at both ends in the width direction, and the first stacking portion 601 has a central side as it goes from the lower side to the upper side. It has a pair of downward engaging surfaces 601a that are inclined toward.

  The retaining portion 602 has a shape in which the dimension in the width direction is constant or substantially constant, but has a shape in which the upper end and the lower end are displaced in the width direction. The retaining portion 602 according to the present embodiment is formed so that the vertical cross-sectional shape is a parallelogram.

  Therefore, the retaining portion 602 has an upward contact surface 602a and a downward contact surface 602b that are formed at both ends in the width direction and are parallel to each other.

  The upward contact surface 602a is inclined toward the center side of the retaining portion 602 in the width direction from the lower side to the upper side. The downward contact surface 602b is inclined toward the center side of the retaining portion 602 in the width direction from the upper side to the lower side.

  In addition, in the first meshing connection portion 60, the retaining portion 602, the first lower receiving portion 600, the retaining portion 602, and the first stacking portion 601 are arranged in order from the engaged portion 41 side.

  The second mesh coupling portion 61 has a second lower receiving portion 610 that engages with the first mesh coupling portion 60 from below, and a second product that engages with the second mesh coupling portion 61 from above. And a weight portion 611.

  The second lower receiving portion 610 is formed such that the dimension in the width direction becomes shorter from the lower side to the upper side. Therefore, the second lower receiving portion 610 is a pair of upward engaging surfaces 610a formed at both ends in the width direction, and the second lower receiving portion 610 is located at the center side of the second lower receiving portion 610 from the lower side toward the upper side. It has a pair of upward engaging surfaces 610a that are inclined toward.

  The second stacking portion 611 is formed so that the dimension in the width direction becomes smaller from the lower side to the upper side. Therefore, the second stacking portion 611 is a pair of downward engaging surfaces 611a formed at both ends in the width direction, and the second stacking portion 611 is located at the center side of the second stacking portion 611 from the lower side toward the upper side. It has a pair of downward engaging surfaces 611a that are inclined toward.

  In addition, in the second mesh connection portion 61, the second lower receiving portion 610, the second stacking portion 611, the second stacking portion 611, the second lower receiving portion 610, and the second lower receiving portion are sequentially arranged from the intermediate guide portion 811 side. The parts 610 are lined up.

  Therefore, in the present embodiment, when the first meshing connection portion 60 and the second meshing connection portion 61 are meshed with each other, the first lower receiving portion 600 is applied to the adjacent second stacking portions 611 from below. The first stacking section 601 is configured to be applied to the second lower receiving sections 610 on both sides from above.

  Thereby, the upward engaging surface 600a of the first lower receiving portion 600 and the downward engaging surface 611a of the second stacking portion 611 are engaged with each other, and the downward engaging surface 601a of the first stacking portion 601 is engaged. And the upper engaging surface 610a of the second lower receiving portion 610 are engaged with each other.

  Further, when the first meshing connection portion 60 and the second meshing connection portion 61 are meshed with each other, the retaining portion 602 is applied from below to the second stacking portion 611 that is adjacent on one side in the width direction. At the same time, the second lower receiving portions 610 adjacent to each other on the other side in the width direction are applied from above.

  Thereby, the upward contact surface 602a of the retaining portion 602 and the downward engaging surface 611a of the second stacking portion 611 are engaged with each other, and the downward contact surface 602b of the retaining portion 602 and the second lower receiving portion are engaged. The upper engaging surface 610a of the 610 is engaged with each other.

  In the present embodiment, the first mesh connecting portion 60 is integrally formed with the inner end portion 700 of the outer base portion 70 of the one outer connecting plate 7. That is, the one outer connecting plate 7 is connected to the outer base 70 in addition to the above-described outer base portion 70, the difficult-to-cut portion 71, and the outer guide connecting structure 72, and is an intermediate connecting plate in the width direction. It is provided with the first meshing connecting portion 60 arranged on the 8 side.

  The one outer connecting plate 7 is made of a casting, and for example, a solid metal material to be the difficult-to-cut portion main body 710 is previously arranged in the mold, and the molten metal material is poured into the mold. The outer base portion 70, the difficult-to-cut portion 71 (the exterior portion of the difficult-to-cut portion 71), the outer guide connecting structure 72, and the first meshing connecting portion 60 may be molded.

  In addition, a second mesh connection portion 61 is integrally formed at the inner end portion 700 of the outer base portion 70 of the other outer connection plate 7. That is, the other outer connecting plate 7 is connected to the outer base 70 in addition to the above-described outer base portion 70, the difficult-to-cut portion 71, and the outer guide connecting structure 72, and is an intermediate connecting plate in the width direction. It is provided with a second mesh connection portion 61 arranged on the 8th side.

  The other outer connecting plate 7 is also made of casting, and for example, a solid metal material to be the difficult-to-cut portion main body 710 is previously placed in the mold, and the molten metal material is poured into the mold. The outer base portion 70, the difficult-to-cut portion 71 (the exterior portion of the difficult-to-cut portion 71), the outer guide connecting structure 72, and the second meshing connecting portion 61 may be formed.

  Further, the first mesh connecting portion 60 is integrally formed at one of the intermediate side end portions 800 of the intermediate connecting plate 8, and the second mesh connecting portion 61 is integrally formed at the other intermediate side end portion 801. Has been formed. That is, the intermediate coupling plate 8 includes the intermediate base portion 80, the intermediate guide coupling structure 81, and the first mesh coupling portion 60 and the second mesh coupling portion 61.

  The intermediate connecting plate 8 is also made of cast metal, and the intermediate base portion 80, the intermediate guide connecting structure 81, and the second meshing connecting portion 61 may be formed by pouring a molten metal material into a mold, for example.

  As described above, in the protective plate 1 according to this embodiment, the pair of outer connecting plates 7 and the intermediate connecting plate 8 are connected to each other. When the pair of outer connecting plates 7 and the intermediate connecting plate 8 are connected to each other, as shown in FIG. 1, the outer base portion 70 and the first engaging connecting portion 60, the intermediate base portion 80 and the second engaging portion are connected. The cover portion 2 is configured by the connecting portion 61.

  Further, when the pair of outer connecting plates 7 and the intermediate connecting plate 8 are connected to each other, the outer guided portion 720 and the intermediate guided portion 810 are continuous in the width direction, so that the connecting structure 4 is The engaging portion 40 is configured, and further, the outer guide portion 721 and the intermediate guide portion 811 are continuous in the width direction, so that the engaged portion 41 of the connecting structure 4 is configured.

  Further, regarding the relationship between the guide connecting structure 72 (the outer guide portion 721 and the outer guided portion 720) of the outer connecting plate 7 and the guide connecting structure 81 (the intermediate guide portion 811 and the intermediate guided portion 810) of the intermediate connecting plate 8. Explaining, the outer guide portion 721 of the outer connecting plate 7 can be fitted into the outer guide portion 721 (guide groove 721a) of another outer connecting plate 7, and also in the intermediate guide portion 811 of the intermediate connecting plate 8. Can be inserted.

  The outer guide portion 721 of the outer connecting plate 7 is arranged in the width direction in the guide groove 721a of the outer guide portion 721 of another outer connecting plate 7 and in the guide groove 811a of the intermediate guide portion 811 of the intermediate connecting plate 8. You can slide with.

  Further, the intermediate guide portion 811 of the intermediate connecting plate 8 can be fitted into the outer guide portion 721 (guide groove 721a) of the outer connecting plate 7, and can also be fitted into the intermediate guide portion 811 of another intermediate connecting plate 8. Can be included.

  The outer guide portion 721 of the outer connecting plate 7 is arranged in the width direction in the guide groove 721a of the outer guide portion 721 of the outer connecting plate 7 and in the guide groove 811a of the intermediate guide portion 811 of another intermediate connecting plate 8. You can slide with.

  The configuration of the protective plate 1 according to this embodiment is the above configuration. Subsequently, a method of using the protective plate 1 will be described.

  When the protective plate 1 is installed on the embedding material, as shown in FIG. 8, the cover portion 2 covers the area including the embedding area E1 in which the embedding material exists and the protection areas E2 on both sides of the embedding material in the width direction. The protective plate 1 is arranged so as to cover it.

  More specifically, first, as shown in FIG. 6, the difficult-to-cut portion 71 is located at a position corresponding to the outside of the protection area E2 or further outside the protection area E2, and one of the outer couplings is connected. Arrange the plate 7.

  Then, the intermediate connecting plate 8 is connected to the one outer connecting plate 7. In the present embodiment, the second meshing connecting portion 61 of the intermediate connecting plate 8 is made to approach the first meshing connecting portion 60 of the one outer connecting plate in the width direction, and the first meshing connecting portion 60 and the second mesh connecting portion 60 are connected. Mesh with mesh. At this time, the amount of meshing between the first meshing connecting portion 60 of the one outer connecting plate and the second meshing connecting portion 61 of the intermediate connecting plate 8 is adjusted as necessary.

  Then, the other outer connecting plate 7 is connected to the intermediate connecting plate 8. In the present embodiment, the second meshing coupling portion 61 of the other outer coupling plate 7 is made to approach the first meshing coupling portion 60 of the intermediate coupling plate 8 in the width direction, and the second meshing coupling portion 61 and the The one-mesh connection portion 60 is meshed. At this time, the meshing amount of the first meshing connecting portion 60 of the intermediate connecting plate 8 and the second meshing connecting portion 61 of the other outer connecting plate 7 is adjusted as necessary.

  This completes the work of installing the single protective plate 1.

  When connecting a newly installed protection plate 1 (hereinafter referred to as new protection plate 1) to an existing protection plate 1 (hereinafter referred to as existing protection plate 1), the outer connection plate 7 of the new protection plate 1 is guided by the outer protection plate 1. The portion is fitted into the connecting groove 410 of the engaged portion 41 of the existing protective plate 1.

  Then, the outer connecting plate 7 of the new protective plate 1 is arranged at a position adjacent to the outer connecting plate 7 of the existing protective plate 1 in the longitudinal direction. Since the outer guided portion 720 is slidable in the width direction in the connection groove 410, by sliding the outer connection plate 7 of the new protective plate 1 in the width direction, the position of the outer connection plate 7 can be changed. Can be adjusted.

  Subsequently, as shown in FIG. 7, the intermediate connecting plate 8 is connected to the outer connecting plate 7 of the newly-arranged protective plate 1 previously arranged. In the present embodiment, the intermediate guided portion 810 of the intermediate connecting plate 8 is fitted into the connecting groove 410 of the existing protective plate 1 (the guide groove 721a of the other outer connecting plate 7) to connect the outer side of the new protective plate 1 in the width direction. The intermediate connecting plate 8 is slid toward the plate 7.

  Then, the first mesh connecting portion 60 of the outer connecting plate 7 of the new protective plate 1 and the second mesh connecting portion 61 of the intermediate connecting plate 8 mesh with each other. In addition, in order to adjust the meshing amount of the first meshing connecting portion 60 of the outer connecting plate 7 and the second meshing connecting portion 61 of the intermediate connecting plate 8, the outer connecting plate 7 of the new protective plate 1 and the intermediate connecting plate 8 are adjusted. May be slid in the width direction.

  Further, the guided portion of another outer connecting plate 7 is fitted into the connecting groove 410 of the existing protective plate 1 (the guide groove 721a of the other outer connecting plate 7), and is inserted into the intermediate connecting plate 8 of the new protective plate 1 in the width direction. The outer connecting plate 7 is slid toward.

  Then, the guided portion of the other outer connecting plate 7 is fitted into the connecting groove 410 of the existing protective plate 1 (the guide groove 721a of the other outer connecting plate 7), and the other outer connecting plate 7 is intermediately connected in the width direction. Slide it towards the plate 8. In addition, in order to adjust the meshing amount of the first meshing connecting portion 60 of the intermediate connecting plate 8 and the second meshing connecting portion 61 of the other outer connecting plate 7, the other outer connecting plate 7 is slid in the width direction. You can do it.

  This completes the work of connecting the new protective plate 1 to the existing protective plate 1. Then, by repeating the work of connecting the new protective plate 1 to the existing protective plate 1, as shown in FIG. 8, a plurality of protective plates 1 are arranged without gaps along the longitudinal direction. Then, the protective plates 1 are buried by backfilling the respective protective plates 1.

  As shown in FIG. 9, the protection plate 1 embedded in the embedding material as described above has, for example, each cutting notification portion 3 (difficult-to-cut portion 71) arranged on the protection area E2. When the concrete cutter C that moves while cutting the ground is trying to cross the embedding material M, the blade of the concrete cutter C hits the difficult-to-cut body 710, and the cutting resistance generated on the blade increases.

  In the present embodiment, since the difficult-to-cut portion main body 710 is made of a metal having a lower cutting property than the cover portion 2, it becomes easy to generate a large cutting resistance for the blade hitting the cutting notification portion 3, so that the operator However, it becomes easy to detect an abnormality that occurs in the concrete cutter C while cutting the cutting notification unit 3. Therefore, the protective plate 1 according to the present embodiment has an excellent effect that the operator can surely know the existence of the embedded material M.

  Further, since the cutting notification portion 3 is formed so as to extend along the side end portion 20 of the cover portion 2, the blade of the concrete cutter C that attempts to move across the embedded material M is likely to hit.

  In addition, the cutting informing part 3 has one end in the longitudinal direction adjacent to the engaged part 41 of the connecting structure 4 so that the blade of the concrete cutter C attempting to advance across the embedded material M can easily hit and the longitudinal direction. By forming a gap S between the other end in the direction and the engaging portion 40 of the connecting structure 4, the engaged portion 41 can be inserted into the gap S, and the protective plate 1 (outer connecting plate 7) is formed. The position adjustment in the width direction is not disturbed.

  Therefore, according to the protective plate 1 according to the present embodiment, the worker can surely know the existence of the embedded material M, and the installation workability is improved.

  In addition, the protective plate 1 according to the present embodiment adjusts not only the position in the width direction (position with respect to the embedding material M) but also the positional relationship between the protective plates 1 in the width direction so that Since the length can be adjusted, it is possible to easily cover the area including the embedding area E1 and the protection area E2 with the cover portion 2, and when the embedding material M is bent in the width direction. In particular, the cover portion 2 can particularly effectively cover the region including the embedded region E1 and the protective region E2.

  Furthermore, since the length of the protective plate 1 in the width direction can be changed by changing the meshing amount of the first meshing connection portion 60 and the second meshing connection portion 61 that are adjacent in the width direction, It is possible to change the length of the protective plate 1 in the width direction while maintaining the state where the one meshing coupling portion 60 and the second meshing coupling portion 61 mesh with each other. That is, in the protective plate 1 according to this embodiment, the length of the protective plate 1 in the width direction can be changed without completely separating the outer connecting plate 7 and the intermediate connecting plate 8.

  Further, since the first meshing connection portion 60 and the second meshing connection portion 61 are configured to be restricted from moving in the vertical direction while meshing with each other, the outer coupling plate 7 and the intermediate coupling plate 8 are arranged. On the other hand, even if an external force acts in the vertical direction, it is possible to prevent the connection between the outer connecting plate 7 and the intermediate connecting plate 8 from being released.

  This will be described more specifically. When the first meshing connection part 60 and the second meshing connection part 61 are meshed with each other, the first lower receiving part 600 of the first meshing connection part 60 and the second meshing connection part 61 of the first meshing connection part 60 which are adjacent to each other in the longitudinal direction. The second stacking portion 611 engages in the vertical direction, and further, the first stacking portion 601 of the first meshing coupling portion 60 and the second lower receiving portion 610 of the second meshing coupling portion 61 engage in the vertical direction. To meet each other.

  Further, the retaining portion 602 of the first meshing coupling portion 60 and the second lower receiving portion 610 and the second stacking portion 611 of the second meshing coupling portion 61 engage with each other, so that the first meshing coupling portion 60 and The movement of the second meshing connection portion 61 in the vertical direction is restricted.

  Therefore, for example, even if the hard-to-cut portion 71 side of the outer connecting plate 7 is scooped up by a backhoe or the like, the outer connecting plate 7 is prevented from being peeled off from the intermediate connecting plate 8 or the protection plate 1 adjacent in the longitudinal direction. To be done.

  Further, since the engaging portion 40 of another protective plate 1 is superposed on the engaged portion 41 of the protective plate 1, the outer connecting plate 7 and the intermediate connecting plate 8 move in the vertical direction. By allowing the protection plates 1 adjacent to each other in the width direction to partially overlap with each other while restricting the above, the protection plates 1 of a part of the plurality of buried protection plates 1 and the outer connection It becomes easy to prevent only the plate 7 from coming off.

  Further, in the protective plate 1, since the through hole 22 is formed in the cover portion 2 to reduce the weight, the installation work is facilitated.

  Further, in the present embodiment, the plurality of holes 704 are formed in the outer base portion 70 of the outer connecting plate 7, and the plurality of holes 804 are also formed in the intermediate base portion 80 of the intermediate connecting plate 8. The weight of the outer connecting plate 7 and the intermediate connecting plate 8 itself is also reduced. Therefore, the installation work of the outer connecting plate 7 and the intermediate connecting plate 8 can be performed with less labor.

  In addition, by forming the through hole 22 in the cover portion 2, it is possible to prevent water such as rainwater that has penetrated into the ground from being accumulated on the cover portion 2, thereby preventing deterioration (corrosion) of the cover portion 2. Can be suppressed. That is, by forming the hole 704 in the outer base portion 70 and forming the hole 804 in the intermediate base portion 80, it is possible to prevent water from being accumulated on the outer base portion 70 and the intermediate base portion 80. Therefore, the deterioration of the outer base portion 70 and the intermediate base portion 80 can be suppressed.

  In the protection plate 1 according to the present embodiment, the outer guided portion 720 of the outer coupling plate 7 and the intermediate coupling are formed in the coupling groove 410 of the engaged portion 41 formed of the outer guide portion 721 and the intermediate guide portion 811. Since the intermediate guided portion 810 of the plate 8 is configured to be slidable, the arrangement position can be adjusted by sliding the outer connecting plate 7 and the intermediate connecting plate 8 in the width direction without lifting. You can Therefore, the protective plate 1 can efficiently perform the installation work with less labor.

  Further, by making the outer guided portion 720 of the outer coupling plate 7 and the intermediate guided portion 810 of the intermediate coupling plate 8 slidable in the coupling groove 410 of the engaged portion 41, the first mesh coupling portion 60. And the second mesh connection portion 61 are meshed with each other in the width direction to connect the outer connection plate 7 and the intermediate connection plate 8, and the first mesh connection portion 60 and the second mesh connection portion 61 are arranged in the width direction. The work of adjusting the length of the protective plate 1 in the width direction can be easily performed by adjusting the meshing amount at.

  In this way, the engaged portion 41 is used as a rail, and the outer connecting plate 7 and the intermediate connecting plate 8 can be slid along the rail, so that the first engagement connecting portion 60 and the second engagement connection are formed. It is possible to easily perform the alignment work when meshing the portion 61 and the adjustment work of the meshing amount of the first meshing connection portion 60 and the second meshing connection portion 61.

  The protective plate 1 according to the present embodiment is not limited to the above-described one embodiment, and it goes without saying that various modifications are made without departing from the gist of the present invention.

  Although a plurality of through holes 22 are formed in the cover portion 2 in the above embodiment, the number of the through holes 22 formed in the cover portion 2 is not particularly limited. Further, the number of holes 704 formed in the outer base portion 70 and the number of holes 804 formed in the intermediate base portion 80 are not particularly limited.

  In the above-described embodiment, the protective plate 1 has been described on the premise that one intermediate connecting portion is arranged between the pair of outer connecting plates 7, but two pieces are provided between the pair of outer connecting plates 7. The above-mentioned intermediate connection part may be arranged.

  In the above-described embodiment, in the first meshing connection portion 60, the retaining portion 602, the first lower receiving portion 600, the retaining portion 602, and the first stacking portion 601 are arranged in order from the engaged portion 41 side. In the meshing connection portion 61, the second lower receiving portion 610, the second stacking portion 611, the second stacking portion 611, the second lower receiving portion 610, and the second lower receiving portion 610 are arranged in order from the intermediate guide portion 811 side. However, if the meshing amount of the first meshing connecting portion 60 and the second meshing connecting portion 61 can be adjusted in the width direction, and the movement in the up-down direction can be regulated while meshing with each other, the first meshing connecting portion can be formed. The number and arrangement of the first lower receiving portion 600, the first stacking portion 601, and the retaining portion 602 in the portion 60, and the number and arrangement of the second lower receiving portion 610 and the second stacking portion 611 in the second mesh connection portion 61. Are not particularly limited.

  In the above-described embodiment, the second meshing connection portion 61 is composed of the second lower receiving portion 610 and the second stacking portion 611, but, for example, the second lower receiving portion 610 and the second stacking portion 611. In addition to this, a retaining portion 602 that engages with the first lower receiving portion 600 of the first meshing coupling portion 60 and the first stacking portion 601 may be provided.

  In the above embodiment, the one outer connecting plate 7 includes the first meshing connecting portion 60, but may include the second meshing connecting portion 61, for example. In this case, the first mesh connecting portion 60 may be provided at one of the intermediate end portions 800 of the intermediate base portion 80.

  The other outer connecting plate 7 has the second mesh connecting portion 61, but may have the first mesh connecting portion 60, for example. In this case, the second intermediate coupling portion 61 may be provided at the other intermediate end portion 801 of the intermediate base portion 80.

  In this way, the connection structure 6 can connect the adjacent connecting plate portions (the outer connecting plate 7 and the intermediate connecting plate 8 or the intermediate connecting plates 8 to each other) to the first connecting portion and the second connecting portion. May be provided on the outer connecting plate 7 or may be provided on the intermediate connecting plate 8.

  In the above-described embodiment, in the difficult-to-cut portion 71, the difficult-to-cut portion main body 710 is embedded in the continuous portion 711, but the configuration is not limited to this. For example, in the difficult-to-cut portion 71, a solid metal material for the difficult-to-cut portion main body 710 may be provided on the surface of the continuous portion 711.

  DESCRIPTION OF SYMBOLS 1 ... Protective plate, 2 ... Cover part, 3 ... Cutting notification part, 4 ... Connection structure, 5 ... Connection plate, 6 ... Connection structure, 7 ... Outer connection plate, 8 ... Intermediate connection plate, 20 ... Side end part, 21. ... Adjacent end part, 22 ... Through hole, 40 ... Engagement part, 41 ... Engagement part, 60 ... First mesh connection part, 61 ... Second mesh connection part, 70 ... Outer base part, 71 ... Difficult-to-cut part , 72 ... Outer guide connection structure, 80 ... Intermediate base part, 81 ... Intermediate guide connection structure, 410 ... Connection groove, 600 ... First lower receiving part, 600a ... Upward engaging surface, 601 ... First stacking part, 601a ... downward engaging surface, 602 ... retaining portion, 602a ... upward contact surface, 602b ... downward contact surface, 610 ... second lower receiving portion, 610a ... upward engaging surface, 611 ... second product Heavy portion, 611a ... downward engaging surface, 700 ... inner end portion, 701 ... outer end portion, 702, 703 ... outer contact end portion, 704 ... punched hole, 7 0 ... Difficult-to-cut portion main body, 711 ... Continuously provided portion, 720 ... Outer guided portion, 721 ... Outer guide portion, 721a ... Guide groove, 800, 801 ... Intermediate side end portion, 802, 803 ... Intermediate contact end portion, 804 ... Hole, 810 ... Intermediate guided portion, 811 ... Intermediate guiding portion, 811a ... Guide groove, E1 ... Embedded area, E2 ... Protected area, S ... Gap

Claims (2)

A protective plate arranged above the embedding material to protect a long embedding material embedded in the ground, and a plurality of connecting plates arranged side by side in the width direction orthogonal to the longitudinal direction of the embedding material. A plurality of connecting plate parts, the plurality of connecting plate parts has a metal cover part arranged above the embedding material, and a pair of outermost parts in the width direction of the plurality of connecting plate parts. Each of the connecting plate portions is a cutting notification portion provided at an end portion of the cover portion that is arranged outward in the width direction , and is made of a metal that is inferior in cutting property to the cover portion. and a notification unit, in at least one of the cover portion of the plurality of connecting plate portion, at least one through-hole is formed, each of said plurality of connecting plate portion, in the width direction The bite placed toward the adjacent connecting plate A coupling portion, the meshing coupling portion is configured to mesh with the meshing coupling portion of the coupling plate portions adjacent to each other in the width direction, and the meshing amount of the meshing coupling portions adjacent to each other in the width direction is changed. possible der Ru protection plate. The protective plate according to claim 1 , wherein the meshing connection portion is configured so that movement in the vertical direction is restricted in a state of meshing with the meshing connection portion of the connection plate portions adjacent to each other in the width direction.

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