Removal method for movable protective fences and pavement slabs

Abstract

To provide a mobile protective fence capable of being installed while traveling on a road without arranging a worker for supporting the fence.SOLUTION: A mobile protective fence 1 is provided with a truck part 10 which can move in the front and rear direction, a body part 20 fixed to the truck part 10, an arm part 30 with its base end 31 fixed to the body part 20, and a planar fence part 50 fixed to the tip part 32 of the arm part 30 and extending in the front and rear direction and in the up and down direction. The fence part 50 is located on the side of the truck part 10 and at least one of the front and rear of the truck part 10.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a protective fence for suppressing the scattering of crushed materials generated in road construction and the removal method of paving plates.

Background Art

[0002] When removing asphalt paving plates or concrete paving plates, an operation is performed in which the paving plates are excavated and peeled off with an excavator such as a backhoe and loaded onto a dump truck. In addition to the operation with an excavator, there may be a case where a hacking operation of the paving plate is accompanied by manual labor or heavy machinery. These operations are often performed by restricting traffic on some lanes and providing lanes on which general vehicles can travel. For this reason, a protective fence is installed so that the crushed materials during excavation do not scatter into adjacent lanes. For example, Patent Document 1 describes a lightweight and easily movable folding fence. Further, Patent Document 2 describes a fence that uses a formwork installed in construction as a rail and has wheels at the lower end for movement.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] Construction work such as removing pavement and chipping is carried out while the road is in motion. In construction work that requires closing off some lanes, workers are positioned to support protective fences, and the fences are moved as the work progresses. When attempting to install a fence near the boundary between the lane under construction and an adjacent lane, there are concerns about the impact on traffic in the adjacent lane due to the workers supporting the fence. If a fence equipped with wheels is moved along rails, the number of workers supporting the fence can be reduced, but this would require the separate installation of rails. This invention was made to solve the aforementioned problems and aims to provide a movable protective fence and a method for removing pavement that can be installed while the road is moving, without requiring workers to be stationed to support the fence. [Means for solving the problem]

[0005] To solve these problems, the movable protective fence according to the present invention comprises a trolley portion that can move in the front-rear direction, a main body portion fixed to the trolley portion, an arm portion whose base end is fixed to the main body portion, and a planar fence portion fixed to the tip of the arm portion and extending in the front-rear direction and the up-down direction, wherein the fence portion is positioned to the side of the trolley portion and at least one of the front and rear of the trolley portion. Furthermore, the pavement removal method according to the present invention is a pavement removal method performed while moving along a lane, wherein a dump truck for transporting the pavement debris of the pavement, an excavator for excavating the pavement and loading it onto the dump truck, and a mobile protective fence according to the present invention are moved in this order in a line along the lane, and the fence section is positioned between the pavement being excavated and the lane adjacent to the lane. [Effects of the Invention]

[0006] According to the present invention, a mobile protective fence can be installed without the need to station workers to support the fence, and pavement removal work can be carried out while proceeding along the road. [Brief explanation of the drawing]

[0007] [Figure 1] This is a side view illustrating the schematic of a mobile protective fence according to the present invention. [Figure 2] This is a top view illustrating the schematic of a mobile protective fence according to the present invention. [Figure 3] This is a side view illustrating a state in which a movable protective fence is moving along a lane in the pavement removal method according to the present invention. [Figure 4] This is a side view illustrating a schematic modification of the movable protective fence according to the present invention. [Modes for carrying out the invention]

[0008] Embodiments of the present invention will be described with reference to the drawings. As illustrated in Figure 1, the mobile protective fence 1 according to the present invention comprises a trolley portion 10, a main body portion 20, an arm portion 30, and a fence portion 50. The main body 20, etc., is assembled using pipe material 80P as an example. Pipe material 80P is a steel pipe, such as a single-pipe pipe. Pipe material 80P can be connected to each other using joint fittings 80J that connect pipe material 80P in an L-shape or T-shape, or clamp fittings 80C that cross and fix pipe material 80P.

[0009] (Trolley section) The trolley section 10 supports the entire mobile protective fence 1 and is a movable device having wheels or the like. The trolley section 10 can move at least in the front-to-back direction. Here, the trolley section 10 is a vehicle 100 having a cargo bed 150. The vehicle 100 can be, for example, a small truck.

[0010] (Main body) The main body section 20 serves as the base for the mobile protective fence 1 and is fixed to the trolley section 10. Here, four pipes form a rectangle at the top, and columns are erected at the vertices of the rectangle to support it parallel to the floor 152 of the loading platform 150. As illustrated in Figure 2, in a plan view, the two pipes 22 in the left-right direction and the two pipes 21 in the front-back direction form the four sides of the rectangle. The four pipes 23 and 24 serve as columns, with the two pipes 23 located at the front being longer than the two pipes 24 located at the rear. Between the pipes 23 and between pipes 23 and pipes 24, horizontal members 26 and 27 for reinforcement are provided at a position approximately half the height from the floor 152 of the loading platform 150 to the top of the main body section 20. The main body 20 is secured to the vehicle 100 by a tie-down strap 25. The tie-down strap 25 is preferably placed on the opposite side of the fence 50, that is, towards the rear of the main body 20 when the fence 50 is positioned forward. The tie-down strap 25 can be attached to the hook 155 of the vehicle 100, for example, using a cargo tie-down belt.

[0011] (arm) The arm portion 30 extends from the main body portion 20 and supports the fence portion 50. The base portion 31 of the arm portion 30 is fixed to the main body portion 20, and the fence portion 50 is fixed to the tip portion 32. The arm portion 30 has an overhang portion 33 that extends to the right from the base portion 31, an extension portion 34 that extends forward from the overhang portion 33, and an oblique portion 35 provided between the extension portion 34 and the main body portion 20. The overhanging section 33 consists of two parallel pipes, with one end of each fixed to the main body 20 and the other end extending to the right from the main body 20. The length of the overhang should be based on the position where the fence section 50 will be placed, and it is preferable to make it as short as possible so as not to obstruct the traffic of other vehicles, etc. Furthermore, it is preferable that the two overhanging sections 33 are spaced apart from each other in order to stabilize the extension section 34.

[0012] The extension section 34 is a long pipe, supported at two points on one end by two separate overhangs 33, and the other end extends forward beyond the front end of the vehicle 100. The front end of the extension section 34 is located at the tip 32 of the arm section 30. The extension section 34 may be a single pipe or may be made by connecting two or more pipes. The oblique section 35 is a pipe material provided diagonally between the main body 20 and the arm section 30. In this case, the oblique section 35 is provided between the left vertical pipe material 23 of the main body 20 and the tip section 32 of the extension section 34.

[0013] (pillar part) The arm portion 30 has a support column portion 40 at its tip portion 32. The support column portion 40 is a pipe material provided in the vertical direction and has a wheel 43 at its lower end portion 42 that can travel on the ground. A pipe material 37 is provided in an oblique direction between the lower end portion 42 of the support column portion 40 and the vicinity of the center of the oblique section 35. In addition, a pipe material 36 is provided in an oblique direction between the support column portion 40 and the extension portion 34. The fence section 50 can be fixed to the support post section 40. Here, the fence section 50 is fixed to the support post section 40 via a mounting section 55. The upper end 41 of the support post section 40 is located higher than the fence section 50. The upper end 41 pulls the fence section 50 upward by a tension section 44 provided between it and the mounting section 55. The tension section 44 can be, for example, a wire rope made of metal. In addition, a diagonally oriented pipe 45 is provided between the upper end 41 of the support post section 40 and the mounting section 55.

[0014] (Fence section) The fence section 50 is a planar member that prevents debris generated by construction work from scattering into the surrounding area. The fence section 50 is positioned to the right and in front of the vehicle 100. The fence section 50 is fixed so that it forms a surface that extends in the front-rear and up-down directions. As illustrated in Figure 2, for example, when construction is carried out in lane 500, the vehicle 100 travels in lane 500, and the fence section 50 can be installed along the boundary with the adjacent lane 550. The fence part 50 is preferably lightweight to suppress the load applied to the main body part 20 and the arm part 30 and to facilitate movement. Also, it is preferably reticulated so that the force when receiving wind is small. Here, a rectangular frame with a net stretched over it is used. The fence part 50 can use a commercially available net for preventing scattering, etc. Note that the fence part 50 may be a plate-like member or may be a frame with a cloth or the like stretched over it. The fence part 50 is fixed to the mounting part 55. The mounting part 55 is a pipe material assembled in a U-shape and is fixed to the support part 40 at two locations with different heights. The mounting part 55 preferably changes its shape according to the size of the fence part 50 and the shape of the frame. The fence part 50 may be directly fixed to the support part 40 or the like without providing the mounting part 55.

[0015] Next, the effects of the mobile protective fence 1 will be described. The mobile protective fence 1 includes a cart part 10 movable in the front-rear direction, a main body part 20 fixed to the cart part 10, an arm part 30 with a base end part 31 fixed to the main body part 20, and a planar fence part 50 fixed to the tip end part 32 of the arm part 30 and extending in the front-rear direction and the up-down direction. The fence part 50 is disposed on the side of the cart part 10 and at least one of the front and rear of the cart part 10. With such a configuration, the mobile protective fence 1 can move by the cart part 10 by disposing the fence part 50 on the side of the cart part 10 and at least one of the front and rear of the cart part 10. Also, the planar fence part 50 extending in the front-rear direction and the up-down direction can effectively suppress the scattering of crushed objects and the like to the side.

[0016] For the mobile protective fence 1, it is preferable that the fence part 50 is spaced apart laterally from the cart part 10 and is spaced apart at least one of the front and rear from the cart part 10. With such a configuration, the mobile protective fence 1 can maintain a distance from the adjacent lane while arranging the fence portion 50 near the boundary with the adjacent lane. Also, while maintaining a distance from the carriage portion 10 with respect to the work being performed in the front or rear, the fence portion 50 can be arranged on the side of the work location, effectively suppressing the lateral scattering of crushed materials and the like.

[0017] The mobile protective fence 1 has an arm portion 30 with a support column portion 40 provided vertically at the tip portion 32. The upper end portion 41 of the support column portion 40 is at a position higher than the fence portion 50 and has a tension portion 44 for pulling the fence portion 50. The lower end portion 42 of the support column portion 40 preferably has wheels 43 capable of traveling on the ground. With such a configuration, the mobile protective fence 1 can support the load between the ground while the support column portion 40 travels together with the carriage portion 10, and the fence portion 50 can be arranged at a position further away from the carriage portion 10.

[0018] The mobile protective fence 1 preferably has an arm portion 30 with an overhanging portion 33 that protrudes laterally from the base end portion 31, an extending portion 34 that extends in the front-rear direction from the overhanging portion 33, and an oblique portion 35 provided between the extending portion 34 and the main body portion 20. With such a configuration, the mobile protective fence 1 can improve the strength of the arm portion 30, and the fence portion 50 can be arranged at a position further away from the carriage portion 10.

[0019] The mobile protective fence 1 preferably has the fence portion 50 arranged at a distance to the right side and the front with respect to the carriage portion 10. With such a configuration, the mobile protective fence 1 can arrange the fence portion 50 on the right side of the work location while moving in accordance with the work being performed in front of the carriage portion 10, effectively suppressing the scattering of crushed materials and the like to the adjacent lane on the right side.

[0020] The mobile protective fence 1 preferably has the carriage portion 10 being a vehicle 100, and the main body portion 20 being fixed to the loading platform 150 of the vehicle 100. With this configuration, the mobile protective fence 1 can be moved by the operation of the vehicle 100, and the fence section 50 can be positioned when there are no workers on the road, allowing construction to proceed smoothly.

[0021] The fence section 50 may be positioned to the left of the trolley section 10, or it may be provided on both the left and right sides of the trolley section 10. When positioned at a distance from the trolley section 10, the overhanging section 33 can be made to extend to the left or to both the left and right sides. The fence section 50 may also be positioned behind the trolley section 10, or it may be provided both in front and behind. The extension section 34 can also be extended to the rear.

[0022] Next, the pavement removal method according to the present invention will be described. The pavement removal method is carried out while moving along one lane of the road. As illustrated in Figure 3, the excavator 200 moves in the direction of travel D1 and performs excavation work to remove the pavement 400. The excavator 200 is, for example, a backhoe and also collects the removed pavement debris 450, which is the pavement 400, and loads it onto a dump truck 300. The dump truck 300 moves in conjunction with the excavator 200 and transports the accumulated pavement debris 450 to a collection point. The dump truck 300, which is capable of loading, is positioned in conjunction with the excavator 200. At the location where excavation work is being carried out, a fence section 50 of the movable protective fence 1 is positioned to prevent debris from scattering into the adjacent lane. The fence section 50 is positioned between the excavation site and the adjacent lane and is moved in accordance with the progress of the excavation work. In the direction of travel D1, from front to back, a dump truck 300, an excavator 200, and a mobile protective fence 1 are moving in that order.

[0023] The pavement removal method according to the present invention is a method for removing a pavement 400 while moving along a lane, and involves a dump truck 300 for transporting the pavement debris 450 of the pavement 400, an excavator 200 for excavating the pavement 400 and loading it onto the dump truck 300, and a movable protective fence 1, all of which are moved in this order in a line along the lane, with a fence section 50 positioned between the pavement 400 being excavated and the lane adjacent to it. With this configuration, the pavement removal method allows the fence section 50 to be positioned according to the excavation work location without requiring workers to support the fence. In other words, the protective fence can be erected and the work can proceed without workers being present on the road. Furthermore, the fence section 50 can be positioned near the boundary with an adjacent lane, ensuring a working area in the lane where the work is being carried out and enabling the work to proceed efficiently.

[0024] (modified version) Next, a modified example 1A of the mobile protective fence 1 will be described. As illustrated in Figure 4, in modified example 1A, the fence section 50 is positioned so as to be in contact with the right side of the rear end of the vehicle 100. In addition, a sheet 51 is provided to cover the right side of the cargo bed 150, continuous with the fence section 50. The main body of Modification 1A has a simple structure in which vertical pipes 23A and 24A and a front-to-back pipe 21A are assembled in a U-shape. Pipes 23A and 24A are erected on the floor 152 of the cargo bed 150 and fixed to the side wall 151 by fixing members 28. The front-to-back pipe 21A is supported by pipes 23A and 24A at a position approximately the height of the vehicle 100. A front-to-back pipe 34A, which serves as an arm, is fixed to pipe 21A. Pipe 34A extends rearward beyond the rear end of the vehicle 100.

[0025] The fence section 50 is directly fixed to the pipe 34A without the provision of a mounting section 55. Also, a portion of the front side of the fence section 50 is in contact with the side wall 151 of the cargo bed 150. Between the fence section 50 and the driver's cab of the vehicle 100, a sheet 51 is provided in the front-rear direction so as to cover the pipes 21A, 23A, 24A, and 34A. The sheet 51 can be, for example, a protective sheet, and may be in the form of a plate or a mesh. Modification 1A allows for the installation of a mobile protective fence with a simple configuration. Furthermore, by using the cargo bed 150 of the vehicle 100 to provide a sheet 51, the range of the protective fence can be extended.

[0026] The trolley section 10 may be, for example, a handcart. Even if a handcart is used, the fence section 50 can be separated from the trolley section 10. The worker pushing the handcart can move the mobile protective fence to a position away from the adjacent lane. The main body 20 and the arm 30 may be made by combining pipes and facing materials. The whole or part may be made of wood or the like. The pipes and facing materials can be connected to each other, for example, by bolts and nuts. The main body 20 may also be fixed to the trolley 10 with bolts or the like. The fence section 50 may consist of not just one panel, but two or more panels connected together to protect a wider area. In that case, additional support posts 40 and tensioning parts 44 can be added to support multiple fence sections 50. [Explanation of Symbols]

[0027] 1. Mobile protective fence 1A Variation 10 Bogie section 20 Main body 25 Cable Ties 28 Fixing member 30 Arm 31 Proximal end 32 Tip 33 Overhang 34 Stretching section 35 Oblique area 40 Support section 43 wheels 44. Tensile section 50 Fence Section 51 sheets 55 Mounting part 100 vehicles 150 cargo bed 151 Side wall 152 beds 155 hooks 200 Excavators 300 Dump Trucks

Claims

1. A trolley section that can move in the front-to-back direction, A main body is fixed to the trolley, with both ends of a pipe member provided in the front-to-back direction supported by pipe members in the up-to-down direction, An arm portion whose base end is fixed to the main body portion, The arm portion is fixed to the tip of the arm and comprises a planar fence portion that extends in the front-to-back and up-and-down directions, The fence portion is positioned to the side of the trolley portion, and at least one of the front and rear of the trolley portion, at a distance from the main body portion in a side view. A movable protective fence to prevent the scattering of debris during road construction.

2. The fence portion is positioned laterally away from the trolley portion and at least one of the front and rear sides of the trolley portion. The movable protective fence according to claim 1.

3. The arm portion has a support column portion provided vertically at its tip, The upper end of the support column is located higher than the fence and has a tensioning portion that pulls the fence. The lower end of the support column has wheels that can travel on the ground. The movable protective fence according to claim 1.

4. The aforementioned arm portion is The protruding portion extending laterally from the base end, An extended portion extending in the front-rear direction from the aforementioned protruding portion, Having an oblique portion provided between the extended portion and the main body portion, The movable protective fence according to claim 1.

5. The fence section is positioned to the right and forward of the trolley section. The movable protective fence according to claim 1.

6. The aforementioned bogie section is a vehicle, The main body is fixed to the cargo bed of the vehicle. The movable protective fence according to claim 1.

7. A method for removing pavement while driving in a lane, A dump truck for transporting the pavement material of the aforementioned pavement slab, An excavator for excavating the aforementioned pavement and loading it onto the aforementioned dump truck, A movable protective fence according to any one of claims 1 to 6, and while moving in parallel along the lane in this order, The fence section is placed between the pavement being excavated and the lane adjacent to the lane. A method for removing pavement slabs.

Images