Temporary protective fence and temporary protective fence connector

Abstract

To provide a temporary protective fence which is installed on the road surface and prevents entry of a vehicle to a restricted area and can be installed at a predetermined position in a short time, and a temporary protective fence coupling body obtained by coupling a plurality of temporary protective fences.SOLUTION: A temporary protective fence comprises a body part 2 which has a predetermined length in the longitudinal direction and is installed on the road surface, a coupling mechanism 4 which is provided at both edges on the body part in the longitudinal direction and is coupled with the body part of another temporary protective fence detachably, and a caster 3 which is provided so as to be movable in the vertical direction with respect to the body part. The caster 3 is operable in a state where the caster moves upward from the lower end of the body part 2 and the body part comes into contact with the road surface and is supported, and a state where the caster protrudes from the lower end of the body part and the body part separates from the road surface and is supported by the caster.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a temporary protective fence and a connecting body of temporary protective fences, which are arranged at the boundary of an area for restricting the intrusion of vehicles and the like on roads and work areas, and are installed to protect the restricted area.

Background Art

[0002] When lane regulation is performed during construction of a road in use, for example, a temporary protective fence is installed to separate the lane for use in driving from the lane to be regulated and to safely perform work in the regulated lane. Further, the temporary protective fence may be used to demarcate an area where vehicle entry is restricted and an area where vehicles pass in a work area where construction work or the like is being carried out. As such a temporary protective fence, for example, those described in Patent Document 1 or Patent Document 2 are known.

[0003] The temporary protective fence described in Patent Document 1 is based on an H-shaped steel, and a guardrail is attached to a column erected thereon. Further, Patent Document 2 is based on a concrete block, and a protective fence is attached on this base, and the concrete block can be connected to another adjacent concrete block. Such a temporary protective fence can be installed by placing it at a predetermined position on the road surface, and no processing of the road surface or the like is required. And when the construction or the like is completed, the restriction on the driving of vehicles and the like can be released by moving the temporary protective fence.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the conventional temporary protective fence has the following problems that require solutions. The above-mentioned temporary protective fence stably supports the guardrail or the protective fence by the weight of the foundation made of H-shaped steel or the foundation made of concrete blocks, and resists the accidental intrusion of vehicles. For this reason, for the installation of the temporary protective fence, a foundation made of H-shaped steel or concrete blocks needs to be lifted using a crane or the like and installed at a predetermined position. And it takes a long time to sequentially install and arrange temporary protective fences of a predetermined length. Also, when lifting and installing a foundation made of H-shaped steel or concrete blocks, in order to avoid danger to vehicles traveling in a nearby position, for example, a vehicle traveling in a nearby lane, it may be necessary to impose a driving restriction over a wide range for a long time.

[0006] The present invention has been made to solve such problems, and its object is to provide a temporary protective fence and a temporary protective fence connection body that can be installed at a predetermined position in a short time and can shift from a state where the driving of vehicles and the like is not restricted to a restricted state in a short time.

Means for Solving the Problems

[0007] In order to solve the above problems, the invention according to claim 1 is a temporary protective fence installed on a road surface to prevent vehicles from entering a restricted area, which has a main body portion with a predetermined length in the longitudinal direction and installed on the road surface, a connecting mechanism provided at both longitudinal ends of the main body portion for detachably connecting to the main body portions of other temporary protective fences, and casters movably provided in the vertical direction with respect to the main body portion. The casters can be operated to a state where they rise above the lower end of the main body portion and the main body portion is in contact with and supported on the road surface, and a state where they protrude from the lower end of the main body portion and the main body portion is detached from the road surface and supported by the casters. The connecting mechanism connects the main body portions of both this temporary protective fence and other temporary protective fences so as to be rotatable in the horizontal direction, and has an angle limiting member for limiting the angle by which the main body portions of both this temporary protective fence and other temporary protective fences rotate in the horizontal direction. The angle limiting member is detachably attached to this temporary protective fence or other temporary protective fences, has a plate-shaped portion supported between steel end plates provided at the ends of both temporary protective fences and facing each other, and the rotatable angle between this temporary protective fence and other temporary protective fences is variable according to the thickness of the plate-shaped portion, providing a temporary protective fence.

[0008] In this temporary protective fence, the main body portion can be supported by the casters in a state where a plurality of them are connected and moved in the connected state. Therefore, it is possible to install the temporary protective fence over a long distance in a short time. For example, when restricting some lanes of a road with two or more lanes, arrange the temporary protective fences of the present invention on the road shoulder or the like, support each temporary protective fence by the casters in the connected state. Then, move the plurality of connected temporary protective fences to the boundary between the lane to be restricted and the lane allowing vehicle passage, raise the casters and lower the main body portion onto the road surface, and the temporary protective fence can be installed in a short time. Also, since there is no need to lift the temporary protective fence during movement, it is possible to avoid endangering the vehicles in the lane allowing passage.

[0009] In addition, in this temporary protective fence, since the connecting portions where a plurality of them are connected are rotatable, it becomes easy to arrange them in a curved shape. And the temporary protective fence can be sequentially moved in the connected state, and smooth installation can be achieved with manual labor or a simple device.

[0010] Furthermore, in this temporary protective fence, when a vehicle or the like collides in a state where a plurality of them are connected and installed, the temporary protective fence at the collided portion moves due to the impact. However, since the angle at which the connecting portion can rotate is limited to a predetermined value, the impact force is effectively transmitted to the adjacent connected temporary protective fence. Thereby, it is suppressed that the movement amount of the temporary protective fence becomes excessive. Also, the temporary protective fence at the collided portion and the adjacent connected temporary protective fence move in a state where a frictional resistance force acts between them and the road surface, and the impact of the colliding vehicle is alleviated.

[0011] The invention according to claim 2 is the temporary protective fence according to claim 1, wherein the connecting mechanism has a first connecting plate protruding horizontally from the main body portion, and the first connecting plate protrudes so as to be able to overlap the horizontal position with a second connecting plate supported by the main body portion of another temporary protective fence to be connected, and is provided with a connecting rod that vertically penetrates circular holes provided in both the first connecting plate and the second connecting plate.

[0012] In this temporary protective fence, by adjusting the position of the second connecting plate of another temporary protective fence to be connected to the first connecting plate and inserting the connecting rod into the circular hole from above, two temporary protective fences can be easily connected. And with the connecting rod as a rotation axis, the two temporary protective fences can rotate horizontally.

[0013] The invention according to claim 3 is a temporary protective fence installed on a road surface to prevent vehicles from entering a restricted area, having a main body portion with a predetermined length in the longitudinal direction and installed on the road surface, a connecting mechanism provided at both longitudinal ends of the main body portion for detachably connecting to the main body portions of other temporary protective fences, and casters movably provided in the vertical direction with respect to the main body portion. The casters can be operated between a state where they rise above the lower end of the main body portion and the main body portion is in contact with and supported on the road surface, and a state where they protrude from the lower end of the main body portion and the main body portion is detached from the road surface and supported by the casters. The main body portion includes end plates made of steel vertically supported at both longitudinal ends, connecting members horizontally connecting both end plates, and side plates attached to both side surfaces in the longitudinal direction of the structure composed of the end plates and the connecting members. The side plates have convex portions that are horizontally continuous between the end plates provided at both ends, and have a strength capable of applying an upward lift force to the downward-facing surface of the convex portions to push up the main body portion, thereby providing a temporary protective fence.

[0014] In this temporary protective fence, the end plates and the side plates are made of steel and can be easily assembled. And an upward lift force can be applied to the downward-facing surface of the convex portion to lift the main body portion, and it can move horizontally in this state. At this time, the upward lift force is applied through rollers that can move horizontally along the convex portion, so as to move the lifted part of the temporarily connected protective fences across the connection part between the temporary protective fences, and the connected temporary protective fences can also be moved sequentially.

[0015] The invention according to claim 4 is the temporary protective fence according to any one of claims 1 to 3, wherein the casters are supported by a caster support mechanism having an outer cylinder fixed to the main body portion, a lifting shaft with a male screw threadedly engaged with a female screw formed on the inner peripheral surface of the outer cylinder, and a caster substrate coupled to the lower end of the lifting shaft so as to be rotatable relative to the axis of the lifting shaft.

[0016] In this temporary protective fence, by rotationally driving the lifting shaft around its axis, the main body can be quickly lifted and lowered, and it is possible to quickly switch between the state where the main body is supported on the road surface and the state where it is supported via casters.

[0017] The invention according to claim 5 is the temporary protective fence according to any one of claims 1 to 4, characterized in that it has an additional weight block that can be attached to and detached from the main body.

[0018] In this temporary protective fence, the main body is made lightweight to facilitate transportation and installation, and the resistance to movement after installation can be increased by the mass of the additional weight block.

[0019] The invention according to claim 6 is A temporary protective fence connecting body, characterized in that a plurality of the temporary protective fences according to any one of claims 1 to 5 are connected in the longitudinal direction.

[0020] The invention according to claim 7 is A temporary protective fence installed on a road surface to prevent vehicles from entering a restricted area, having a main body portion with a predetermined length in the longitudinal direction and installed on the road surface, and provided at both longitudinal ends of the main body portion for detachably connecting to the main body portions of other temporary protective fences. A connecting mechanism, and casters movably provided in the vertical direction with respect to the main body portion, the casters rising from the lower end of the main body portion and the main body portion being in a state of being supported in contact with the road surface, and protruding from the lower end of the main body portion. A temporary protective fence connecting body in which a plurality of temporary protective fences are connected in the longitudinal direction and are operable in a state where the main body portion is detached from the road surface and supported by the casters, and at least one end of the temporary protective fence connecting body is connected to a pillar fixed to the ground. The connecting device for connecting the column body and the end of the temporary protective fence connecting body has a first connecting vertical plate attached to the column body and a second connecting vertical plate attached to the end of the temporary protective fence connecting body and attached to the main body by the connecting mechanism. By overlapping and joining the first connecting vertical plate and the second connecting vertical plate, a temporary protective fence connecting body is provided whose end is connected to the column body.

[0021] If the end of the connecting body formed by connecting a plurality of temporary protective fences is not restricted, when a vehicle or the like collides near the end, the amount of movement near the end of the connecting body may become excessive. However, in the temporary protective fence connecting body of the invention according to this claim, since the end is connected to a column body fixed to the ground, the amount of movement can be suppressed, and safety within the range regulated by the temporary protective fence can be ensured. Note that the column body may be newly installed, or existing guardrail supports or the like can also be used.

[0022] In addition, with this temporary protective fence connector, even when the distance between the pillar body and the end of the temporary protective fence connector is different, it is possible to easily respond and connect by adjusting the length of the first connecting vertical plate attached to the pillar body and the second connecting vertical plate attached to the temporary protective fence connector side, or by adjusting the overlapping range thereof.

Advantages of the Invention

[0023] As described above, in the temporary protective fence of the present invention, the main body is supported by casters in a state where a plurality of them are connected, and it can be moved in a connected state, making it possible to install the temporary protective fence over a long distance in a short time. Further, in the temporary protective fence connector of the present invention, a plurality of temporary protective fences can be easily moved in a direction perpendicular to the longitudinal direction in a connected state, and the safety of the restricted area can be maintained against vehicle collisions and the like.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Embodiments for Carrying Out the Invention

[0025] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 are schematic perspective views showing a temporary protective fence which is an embodiment of the present invention, FIG. 3 is a front view and a cross-sectional view, and FIGS. 4 are a plan view and a side view. Also, FIGS. 5 and 6 show the assembly of the structure constituting this temporary protective fence and the attachment state of the side plates. This temporary protective fence 1 has a main body 2 formed of steel, and is equipped with casters 3 so that the main body 2 can be lifted and lowered. Further, connecting mechanisms 4 are provided at both longitudinal ends of the main body 2, and a plurality of temporary protective fences having the same configuration can be connected in the longitudinal direction. As shown in FIGS. 3(b) and 7, the casters 3 support the main body 2 by lowering the casters 3 from a state where the main body 2 is in contact with and supported by the road surface, enabling easy movement.

[0026] The main body 2 has a structure 11 made of steel and side plates 12 supported by the structure 11. The structure 11 includes end plates 13a, 13b provided vertically at both longitudinal ends, an intermediate plate 14 provided substantially perpendicular to the longitudinal axis at the central portion between the two end plates 13a, 13b, two intermediate reinforcing plates 15 provided substantially parallel to the intermediate plate 14 between the end plates 13a, 13b and the intermediate plate 14, an upper connecting member 16 that horizontally connects the upper portions of the end plates 13a, 13b, the intermediate plate 14, and the intermediate reinforcing plates 15, and a lower connecting member 17 that connects the lower portions of the end plates 13a, 13b, the intermediate plate 14, and the intermediate reinforcing plates 15. The main part is constituted by these. And side plates 12 made of steel are attached to both side surfaces of this structure 11.

[0027] As shown in FIG. 3(a), the end plates 13a, 13b have a plurality of convex portions 13c that project laterally at the upper part, and the lower part is a steel plate whose shape widens downward. A concave portion that is continuous in the vertical direction is formed at the central portion by a vertical folding line 13d. A plurality of connecting plates 21a, 21b are attached to this concave portion so as to project substantially horizontally, and circular holes 22 are provided in each of them. These connecting plates 21a, 21b constitute the connecting mechanism 4, and the height position of the connecting plate 21a provided at one end of the main body 2, that is, the A end, is different from the height of the connecting plate 21b provided at the other end, that is, the B end. And the connecting plate 21a provided at the A end projects so that it can be vertically overlapped with the connecting plate 21b provided at the B end of another temporary protective fence having the same configuration, and the horizontal positions of the circular holes 22 can be made to coincide. The above-mentioned connecting mechanism 4 will be described later.

[0028] The above-mentioned intermediate plate 14 and intermediate reinforcing plate 15 are flat steel plates arranged substantially perpendicular to the axis in the longitudinal direction of the main body portion 2. As shown in FIG. 5, a plurality of overhanging fixing portions 18a, 18b, 18c protruding from the side edges in the longitudinal direction of the main body portion are provided on these intermediate plate 14, intermediate reinforcing plate 15, and the above-mentioned end plates 13a, 13b respectively. It is possible to join the upper coupling member 16, the lower coupling member 17, and the side plate 12 by these overhanging fixing portions 18.

[0029] The upper coupling member 16 connects the end plates 13a, 13b and the intermediate plate 14, and has a flat portion at the central portion in the width direction and is shaped such that both sides near the edges are bent obliquely downward. And it is fixed by bolts to the mounting members 19 attached to the back surface of the end plates 13a, 13b and the vertical surface of the intermediate plate 14. The lower coupling member 17 is formed by bending a steel plate, and is fixed by bolts to the overhanging fixing portions 18c provided on both side edges at the lower part of the end plates 13a, 13b, and connects both end plates at both side edge portions. Between both end plates 13a, 13b, the lower part of the intermediate plate 14 and the lower part of the intermediate reinforcing plate 15 are fixed to the lower coupling member 17, and the upper part of the intermediate reinforcing plate 15 is fixed in contact with the lower surface of the upper coupling member 16.

[0030] The above-mentioned side plate 12 is formed by bending a steel plate with a plurality of horizontal bending lines, and has a corrugated cross-section with convex portions and concave portions formed alternately and continuously in the horizontal direction. The shapes of the convex portions and the concave portions correspond to a plurality of convex portions 13c formed at the upper parts of both side edges of the end plates 13a, 13b. And it is fixed by bolts to the overhanging fixing portions 18c protruding from the convex portions 13c of the end plate in the axial direction of the main body portion, and is supported at both side portions between the two end plates.

[0031] The above-mentioned caster 3 is supported by a caster support mechanism 31. The caster support mechanism 31 includes an outer cylinder 32, a lifting shaft 33 mounted inside the outer cylinder 32, a handle 34 for rotating the lifting shaft 33 around its axis, a caster substrate 35 joined to the lower end of the lifting shaft 33 so as to be rotatable around the axis with respect to the lifting shaft, and a fixing member 36 for fixing the outer cylinder 32 to the main body 2. A plurality of casters 3 are attached to the lower surface of the caster substrate 35, and the caster substrate 35 can be swiveled in the horizontal direction.

[0032] A female screw is formed on the inner peripheral surface of the outer cylinder 32 and is screwed with a male screw formed on the lifting shaft 33. The lifting shaft 33 is rotationally driven around its axis by the rotation of the handle 34 and is displaced relative to the outer cylinder 32 in the vertical direction. Therefore, by rotating the handle 34, the lifting shaft 33, the caster substrate 35, and the caster 3 can be lowered with respect to the main body 2, and as shown in FIG. 7, the main body 2 can be lifted from the road surface 5 and the main body 2 can be supported via the caster 3. At this time, the lifting shaft 33 and the caster substrate 35 are joined so as to be relatively rotatable, and the rotation of the lifting shaft 33 is not transmitted to the caster substrate 35. And since the caster 3 can be swiveled with respect to the caster substrate 35, the main body 2 can be moved in an arbitrary direction.

[0033] The connecting mechanism 4 connects the A end of the temporary protective fence 1 and the B end of another temporary protective fence having the same configuration, and can sequentially connect a large number of temporary protective fences in series. As shown in FIG. 5, the connecting mechanism 4 mainly includes a plurality of connecting plates 21a, 21b fixed to the end plates 13a, 13b, a connecting rod 23 inserted through the circular holes 22 of the connecting plates, and an angle limiting member 24 attached to the connecting portion. The angular limiting member 24 has a cylindrical portion 24a through which the connecting rod 23 is inserted and a plate-like portion 24b supported by the cylindrical portion 24a. When the plate-like portion 24b is attached to the connecting rod 24 in a state where two temporary protective fences are connected, it is supported at a position close to or in contact with the side portions of both end plates between the end plate 13a at the A end facing each other and the end plate 13b at the B end of the other temporary protective fence.

[0034] With the above connecting mechanism 4, the B end of another temporary protective fence having the same configuration as the A end of the temporary protective fence 1 can be connected as follows. The B end of another temporary protective fence having the same configuration as the A end of the above temporary protective fence is butted, and arranged so that the plane positions of the circular holes 22 of the connecting plates 21a and 21b of both coincide. Then, by inserting the connecting rod 23 from above, the two temporary protective fences can be connected. The two temporarily connected protective fences 1 and 1' can rotate horizontally relative to each other about the connecting rod 23 as shown in FIG. 8. Then, the plate-like portion 24b of the angular limiting member 24 is inserted between the opposing end plates 13a and 13b, and the rotatable angle is restricted. The restricted angle α can be adjusted according to the thickness of the plate-like portion 24b, and it is preferably restricted to 3 degrees to 15 degrees. More preferably, it is 4 degrees to 8 degrees, and in the embodiment shown in FIG. 8, it is 6 degrees.

[0035] Next, an example of the process of installing the above temporary protective fence will be described. This is for installing a temporary protective fence for restricting some lanes on an expressway having a plurality of lanes for pavement repair work etc. First, as shown in FIG. 9(a), pylons 41 (e.g., registered trademark: Color Cone) etc. are arranged along the road alignment to restrict entry into the road shoulder 42. Subsequently, as shown in FIG. 9(b), a plurality of temporary protective fences 1 are carried into the road shoulder 42, moved while being supported via casters, and arranged along the road alignment. Then, the plurality of temporary protective fences 1 are connected in series by the connecting mechanism to form a temporary protective fence assembly 10 as shown in FIG. 9(c). After that, the pylons 41 are restricted It moves to the boundary between the lane 43 and the lane 44 that allows vehicle passage. The temporary protective fence connection body 10 formed by connecting a plurality of temporary protective fences on the road shoulder moves in the width direction of the road within the range where vehicle passage is restricted, as shown in Fig. 10(a). The movement is carried out with the main body supported by casters, and it may be manually pushed forward sequentially, or it may be pushed forward using a vehicle or the like.

[0036] After moving the temporary protective fence connection body 10 to a predetermined position as shown in Fig. 10(b), as shown in Fig. 3(b), the caster 3 is raised with respect to the main body 2 and lowered until the main body 2 is supported on the road surface. Also, if necessary, the connection between some of the temporary protective fences can be released, and as shown in Fig. 10(c), some of the temporary protective fences 1a can be moved within the restricted range to form an access road for construction vehicles and the like.

[0037] When moving the temporary protective fence connection body 10 using a vehicle, the following method can also be adopted. In this method, the main body 2 of the temporary protective fence 1 is kept directly supported on the road surface, and as shown in Fig. 11, a part of the temporary protective fence connection body 10 is lifted and moved by the vehicle 45. Then, as shown in Fig. 12, while moving the lifted area by the running of the vehicle 45, the temporarily connected fence connection body 10 connected in series is sequentially moved over the entire length.

[0038] As shown in Fig. 11, the vehicle 45 has an arm 51 for lifting the temporary protective fence 1, and the arm 51 is provided with rollers 52 that contact both sides of the temporary protective fence 1. The rollers 52 contact the downward-facing surface of the convex portion provided on the side plate 12 of the temporary protective fence 1 and can support the temporary protective fence 1 in a lifted state. As the vehicle 45 runs, the rollers 52 rotate and move along the convex portions continuous in the longitudinal direction of the temporary protective fence 1, thereby shifting the lifted portion of the temporary protective fence connection body 10. Therefore, as shown in Fig. 12, the vehicle 45 can be run in the axial direction of the temporary protective fence connection body 10, and the position of the lifted portion of the temporary protective fence connection body 10 can be continuously moved in the width direction of the road.

[0039] Such a temporary protective fence 1 can be easily moved while being supported by casters 3, and can be connected with a small amount of work to form a temporary protective fence connection body 10. Then, it can be easily moved in the connected state, and the temporary protective fence 1 can be installed over a predetermined long range in a short time. In addition, when a vehicle 46 or the like traveling as shown in FIG. 13 collides with the temporary protective fence connection body 10 in which the temporary protective fences 1 are connected in series, it moves due to the impact and the force due to the collision is transmitted to the adjacent temporary protective fences that are connected. At this time, since the rotation angle between the connected and adjacent temporary protective fences is restricted, a plurality of temporary protective fences move in a gentle curved shape, and excessive movement of each temporary protective fence is suppressed. As a result, even if each temporary protective fence is made lightweight, the amount of movement when the vehicle collides can be suppressed, and the safety of workers and the like within the restricted area can be ensured.

[0040] On the other hand, when a vehicle or the like collides near the end of the temporary protective fence connection body 10, the amount of movement of the temporary protective fence may increase. At this time, as shown in FIG. 14, the end of the temporary protective fence connection body 10 can be connected to a column body fixed to the ground. The column body may be newly provided, but the support column 48 of the existing guardrail 47 can be used.

[0041] FIG. 15 is a side view showing a state in which the end of the temporary protective fence connection body 10 is connected to the support column 48 of the guardrail 47. FIG. 16 is a side view and a plan view showing each member of the connecting device 60 for connecting the end of the temporary protective fence connection body 10 to the support column 48 of the guardrail. This connecting device 60 is made of steel and includes a first connecting vertical plate 61 attached to the support column 48 and a second connecting vertical plate 62 connected to the end of the temporary protective fence connection body 10.

[0042] The first connecting vertical plate 61 has a vertical plate portion 71 and a mounting portion 72 for mounting on the support column 48. The attachment part 72 has a column contact part 72a that abuts against the outer peripheral surface of the column, an auxiliary member 72b that abuts against the outer peripheral surface of the column 48 at a position facing the column contact part 72a, and bolts 72c that connect both ends of the auxiliary member 72b and the column contact part 72a so as to surround the column 48. And this attachment part 72 is coupled to the vertical plate part 71 by a steel member 73. A plurality of bolt holes 71a are provided in the vertical plate part 71 in a horizontal arrangement. These bolt holes 71a are in a shape that is long and curved in the vertical direction. The second connecting vertical plate 62 has a horizontal overhanging plate 75 for connecting the vertical plate part 74 and the temporary guardrail connecting body 10, and these are connected via a steel plate 76. The vertical plate part 74 is provided with bolt holes 74a having the same shape as the vertical plate part 71 of the first connecting vertical plate. Further, the horizontal overhanging plate 75 is provided with circular holes 75a for inserting the connecting rod 23 of the connecting mechanism of the temporary guardrail. Note that the vertical plate parts 71, 74 of the first connecting vertical plate 61 or the second connecting vertical plate 62 can have their horizontal lengths set in advance according to the situation of the installation location of the temporary guardrail connecting body, etc.

[0043] The end of the temporary guardrail connecting body 10 can be connected to the column 48 of the guardrail 47 as follows using the connecting device 60 as described above. Attach the first connecting vertical plate 61 to the column 48 of the guardrail. On the other hand, align the positions of the circular hole 75a of the horizontal overhanging plate 75 of the second connecting vertical plate 62 and the circular hole provided in the connecting plate 21a of the temporary guardrail 1 at the end of the temporary guardrail connecting body 10, and insert the connecting rod 23 through both from above to connect the second connecting vertical plate 62. Then, overlap the vertical plate part 71 of the first connecting vertical plate 61 and the vertical plate part 74 of the second connecting vertical plate 62, insert bolts 77 through the bolt holes 71a, 74a whose positions match, tighten, and connect. As described above, the end of the temporary guardrail connecting body 10 can be easily connected to an existing column.

[0044] The temporary protective fence of the present invention is made mainly of steel, which can be made lightweight for easy transportation and installation. However, when the mass contributing to the resistance during a collision with a vehicle or the like is insufficient, the mass can be added by concrete blocks or the like. FIG. 17 is a schematic cross-sectional view showing a state in which a concrete block 81 is attached as additional mass to the temporary protective fence 1. This concrete block 81 is supported by a support member 82 attached to the structure. The support member 82 is spanned between lower coupling members 17 provided on both side portions of the temporary protective fence 1. A female screw member 83 is embedded in the concrete block 81, and it is fixed to the support member 82 by a bolt 84 that is screwed into the female screw member 83. It is desirable to attach a plurality of the concrete blocks 81 in the longitudinal direction for one temporary protective fence.

[0045] As described above with reference to the drawings, the temporary protective fence 1 and the temporary protective fence connector 10 are examples of embodiments, and the present invention is not limited to these. Therefore, regarding the dimensions, shape, material, etc. of the structure, it can be appropriately changed and implemented within the scope of the present invention.

Explanation of Reference Numerals

[0046] 1: Temporary protective fence, 2: Main body part, 3: Caster, 4: Coupling mechanism, 5: Road surface, 10: Temporary protective fence connector, 11: Structure of the main body part, 12: Side plate, 13a: End plate at the A end of the temporary protective fence, 13b: End plate at the B end of the temporary protective fence, 13c: Convex portion of the end plate, 13d: Folding line of the end plate, 14: Intermediate plate, 15: Intermediate reinforcement plate, 16: Upper coupling member, 17: Lower coupling member, 18a: Overhanging fixing part provided on the intermediate plate, 18b: Overhanging fixing part provided on the intermediate reinforcement plate, 18c: Overhanging fixing part provided on the end plate, 19: Mounting member, 21a: Coupling plate at the A end, 21b: Coupling plate at the B end, 22: Circular hole, 23: Connecting rod, 24: Angle limiting member, 24a: Cylindrical portion of the angle limiting member, 24b: Plate-like portion of the angle limiting member, 31: Caster support mechanism, 32: Outer cylinder, 33: Lifting shaft, 34: Handle, 35: Caster substrate, 41: Pylon (e.g., registered trademark: Color Cone), 42: Shoulder, 43: Lane restricting vehicle passage, 44: Lane allowing vehicle passage, 45: Vehicle for moving temporary protective fence, 46: Vehicle in motion, 47: Guardrail, 48: Support column of guardrail, 51: Arm, 52: Roller, 60: Connecting device, 61: First connecting vertical plate, 62: Second connecting vertical plate, 71: Vertical plate portion of the first connecting vertical plate, 71a: Bolt hole provided in the vertical plate portion, 72: Mounting portion of the first connecting vertical plate, 72a: Column contact portion, 72b: Auxiliary member, 72c: Bolt, 73: Steel member, 74: Vertical plate portion of the second connecting vertical plate, 74a: Bolt hole provided in the vertical plate portion, 75: Horizontal overhanging plate, 75a: Circular hole, 76: Steel plate. 77: Bolt, 81: Concrete block, 82: Support member, 83: Female screw member, 84: Bolt

Claims

1. A temporary protective fence installed on a road surface to prevent vehicles from entering a restricted area, having a main body portion with a predetermined length in the longitudinal direction and installed on the road surface, connecting mechanisms provided at both longitudinal ends of the main body portion for detachably connecting to the main body portions of other temporary protective fences, and casters movably provided in the vertical direction with respect to the main body portion, the casters being operable to rise above the lower end of the main body portion so that the main body portion is in contact with and supported on the road surface, and to protrude from the lower end of the main body portion so that the main body portion is detached from the road surface and supported by the casters, the connecting mechanism being for horizontally rotatably connecting the main body portions of both this temporary protective fence and other temporary protective fences, and having an angle limiting member for limiting the angle by which the main body portions of both this temporary protective fence and other temporary protective fences rotate horizontally, the angle limiting member being detachably attached to this temporary protective fence or other temporary protective fences, having a plate-like portion supported between steel end plates provided at the ends of both temporary protective fences and facing each other, and the rotatable angle between this temporary protective fence and other temporary protective fences being variable according to the thickness of the plate-like portion. A temporary protective fence characterized by this.

2. The connecting mechanism has a first connecting plate protruding horizontally from the main body portion, the first connecting plate protruding so as to be able to overlap the horizontal position with a second connecting plate supported by the main body portion of another temporary protective fence to be connected, The temporary protective fence according to claim 1, further comprising a connecting rod passing vertically through circular holes provided in both the first connecting plate and the second connecting plate.

3. A temporary protective fence installed on a road surface to prevent vehicles from entering a restricted area, having a main body portion with a predetermined length in the longitudinal direction and installed on the road surface, A connecting mechanism provided at both longitudinal ends of the main body portion for detachably connecting to the main body portions of other temporary protective fences; Casters movably provided in the vertical direction with respect to the main body portion; and has, The caster can be operated to a state where it rises above the lower end of the main body portion and the main body portion is in contact with and supported on the road surface, and a state where it protrudes from the lower end of the main body portion and the main body portion is detached from the road surface and supported by the caster. The main body portion includes end plates made of steel vertically supported at both longitudinal ends; Coupling members that horizontally connect both end plates; Side plates attached to both side surfaces in the longitudinal direction of the structure composed of the end plates and the coupling members; and has, The side plate has convex portions that are horizontally continuous between the end plates provided at both ends, and has a strength capable of pushing up the main body portion by applying an upward lifting force to the downward-facing surface of the convex portion. A temporary protective fence characterized by this.

4. The caster is, An outer cylinder fixed to the main body portion, a lifting shaft provided with a male screw that is screwed into a female screw formed on the inner peripheral surface of the outer cylinder, and a caster substrate coupled to the lower end of the lifting shaft so as to be relatively rotatable around the axis of the lifting shaft. A temporary protective fence according to any one of claims 1 to 3, characterized in that it is supported by a caster support mechanism having.

5. A temporary protective fence according to any one of claims 1 to 4, characterized in that it has an additional weight block that can be attached to and detached from the main body portion.

6. A temporary protective fence connection body, characterized in that a plurality of the temporary protective fences according to any one of claims 1 to 5 are connected in the longitudinal direction.

7. A temporary protective fence installed on a road surface to prevent vehicles from entering a restricted area, comprising: a main body portion having a predetermined length in the longitudinal direction and installed on the road surface; a connecting mechanism provided at both longitudinal ends of the main body portion for detachably connecting to the main body portions of other temporary protective fences; and casters movably provided in the vertical direction with respect to the main body portion. The casters can be operated to a state where they protrude above the lower end of the main body portion and the main body portion is in contact with and supported by the road surface, and a state where they protrude from the lower end of the main body portion and the main body portion is detached from the road surface and supported by the casters. A plurality of such temporary protective fences are longitudinally connected to form a temporary protective fence connection body. At least one end of the temporary protective fence connection body is connected to a column fixed to the ground. The connecting device for connecting the column and the end of the temporary protective fence connection body comprises a first connecting vertical plate attached to the column; and a second connecting vertical plate attached to the end of the temporary protective fence connection body and attached to the main body portion by the connecting mechanism. The temporary protective fence connection body is characterized in that the first connecting vertical plate and the second connecting vertical plate are overlapped and joined, whereby the end is connected to the column.

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