JP2018123495A - Undulating housing type temporary guard fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an undulating housing type temporary guard fence provided with guardrails on both sides that can narrow the width in the short direction to achieve a reduced weight and compactify, etc., while improving efficiency of installation and removal work.SOLUTION: A rotary plate 4 is slidably inserted in a clearance C formed on a pair of anchor plates 3 and 3. A pair of reinforcing plates 5 and 5 are installed to the rotary plate 4 via the pair of anchor plates 3 and 3. By removing a nut 58, extracting a bolt 57, and loosening a support pivot nut, the rotary plate 4 becomes rotatable around the support pivot nut 45 (a first rotation axis) allowing a pair of guardrails 6 and 6 to be installed to the rotary plate via a pair of brackets 65 and 65. By loosening a pivot nut, the pair of guardrails 6 and 6 become rotatable around the guardrail pivot bolt 73 (a second rotation axis) via the pair of brackets 65 and 65.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an undulating and accommodating temporary protective fence provided with guard rails on both sides used for road improvement work or the like.

  In large-scale road improvement works, etc., it is common to provide temporary protective fences to ensure safety during construction. In many cases, temporary protective fences are installed only at specific times during the night when traffic is low in order to avoid traffic jams. To ensure safety, installation work must be done after traffic regulations are complete. The same applies to the removal work. That is, there are many cases where the installation / removal work of the temporary protection fence must be performed in a limited time zone in a limited time zone at night. Under such extremely time-constrained conditions, it is indispensable to install and remove temporary protective fences.

JP 2001-207421 A

  As a temporary protective fence for improving the efficiency of installation / removal work, for example, in Patent Document 1, there is a temporary protective fence provided with a guard rail on one side capable of accommodating a guard rail or the like in the basic internal space of the temporary protective fence. It is disclosed. Since this temporary guard fence has a structure in which a guard rail is provided on one side, it can be basically used on a pedestrian boundary or a shoulder. In the case of construction in a narrow place, it may be necessary to install the column by shifting it from the center to one side so that the guard rail does not protrude. In addition, when the temporary protective fence is to be used to separate the up lane and the down lane, the guard rail must be provided again on the other side where the guard rail is not provided after installation. In addition, when removing the guard rail, the guard rail or the like cannot be accommodated in the foundation internal space unless the guard rail on the other side is removed. That is, when this temporary guard fence is used to separate the up lane and the down lane, there is a possibility that the installation / removal work cannot be made more efficient.

  If the temporary guard fence disclosed in Patent Document 1 is modified to provide guard rails on both sides, it is necessary to secure a wide basic internal space in the short direction in order to accommodate the guard rails. As a result, the temporary protective fence becomes larger and heavier, and the efficiency of installation / removal work may not be achieved.

  In road improvement works, etc., in many cases, the same number of lanes as that of the existing road is provided in order to secure a work zone and avoid traffic congestion by cutting the existing road. In addition, new lanes created by turning around are provided with temporary protective fences for separating the up and down lines. In most cases, the new lane cannot secure the lane width of the existing road, resulting in a decrease in traffic capacity at that location and a cause of traffic congestion. Therefore, the width of the temporary protective fence in the short direction may be required to be as narrow as possible within the range permitted by laws and regulations. If a temporary guard fence is installed in a new lane, the width of the foundation structure must be widened, which may be a factor that promotes traffic congestion.

  Accordingly, an object of the present invention is to provide a undulating storage type temporary protective fence that can reduce the width of a member that temporarily raises and lowers the temporary protective fence, achieves weight reduction and compactness, and enables efficient installation and removal work. Is to provide.

  In order to solve the above-mentioned problem, the invention according to claim 1 is fixed to the upper surface of the base frame that is long in the longitudinal direction and has a recess that opens upward, and the web portion of the base frame A fixing member; a guard rail provided in the longitudinal direction; and a rotating plate-like member having a thickness in the short-side direction, and a lower side end portion of the rotating plate-like member extending in the short-side direction. The upper end is pivotally attached to the guard rail about a second pivot axis extending in the short direction, and is pivotally attached to the fixing member about a pivot axis. When the rotating plate-shaped member is in a lying state, the guard rail and the rotating plate-shaped member can be accommodated in the width of the web portion in the short direction, and the rotating plate-shaped member is in a standing state. The rotating plate-like member is the fixing member. A relief housing type temporary safety barrier, characterized in that can be fixed by clamping members.

  According to this configuration, since the rotating plate-like member has a thickness in the short-side direction, the width in the short-side direction can be reduced. Thereby, it can accommodate in the width | variety of the transversal direction of the said web part formed above the said foundation frame in the state which fell the guard rail and the rotation plate-shaped member. The guard rail and the rotating plate-shaped member can be fixed by the tightening member in a standing state. As a result, it can be used not only for road shoulders and pedestrian road boundaries, but also for separating up lanes and down lanes. Since the rotating plate-like member can be fixed by the fixing member, load resistance can be secured. The rotating plate member includes a plate, a hollow plate, and the like.

  Since the guard rail is already installed when the temporary protective fence is raised from the lying down state, even if it is used to separate the up lane and the down lane, it will be used for temporary installation without any new guard rail installation work. Installation work of protective fences can be performed. As a result, the efficiency of installation work can be improved.

  When the rotating plate-like member is in a fallen state, it is accommodated in the recess formed above the foundation frame, so that it is possible to start removing the temporary protective fence without performing the subsequent work. . As a result, the removal work can be made more efficient.

  According to a second aspect of the present invention, in the undulating and accommodating temporary fence according to the first aspect, the fixing member has a longitudinal back portion and a lateral side portion, and a plurality of fixing members are provided in the longitudinal direction of the foundation frame. It is provided.

  According to this configuration, since the fixing plate has the back portion in the longitudinal direction and the side portions in the short direction, the load resistance in the horizontal direction can be enhanced. In addition, since a plurality of pairs of guard rails can be provided on one foundation gantry, a plurality of pairs of guard rails can be provided on one foundation gantry, and the length of the temporary protection fence can be increased. . As a result, the number of installation / removal of temporary protective fences can be reduced, and the efficiency of installation / removal work can be improved.

  The invention according to claim 3 further includes a reinforcing plate for securing a load bearing force in a short direction in the undulating and accommodating temporary protection fence according to claim 1 or 2, wherein the reinforcing plate is rotated by a tightening member. It can be fixed to the moving plate member and the fixing member.

  According to this configuration, the undulating accommodation type temporary guard fence further includes a reinforcing plate for ensuring a predetermined load bearing force in the short direction, so that the width in the short direction of the rotating plate member is further increased. Since the load resistance can be ensured even if the thickness is reduced, the undulating and accommodating temporary guard fence can be made more compact.

  According to a fourth aspect of the present invention, in the undulating and accommodating temporary guard fence according to any one of the first to third aspects, when the base frame in a state where the guard rail and the rotating plate-shaped member are overlaid is stacked upward A support member for supporting the upper base gantry above is further provided on the upper surface of the web portion.

  According to this configuration, since the hoisting-type protective fence includes the support member for supporting the upper base frame, damage due to the upper base frame coming into contact with the lower guard rail is prevented. In order to do this, the undulating and accommodating guard fences can be stacked without any special work. As a result, it is possible to improve the efficiency of loading / unloading work.

  According to a fifth aspect of the present invention, in the undulating and accommodating temporary guard fence according to the fourth aspect, the support member is a pair of U-shaped plates provided in a state where the recessed portions to be opened face each other. The space defined by the pair of plates can accommodate parts necessary for assembling the protective fence.

  According to this configuration, the space defined by the support member can accommodate the parts required when assembling the hoisting and housing type protective fence on site, so that the temporary protective fence can be obtained without separately arranging the parts for assembly. Can be assembled. As a result, the efficiency of installation work can be improved.

  The invention according to claim 6 is the undulating housing type temporary protective fence according to claim 4 or 5, wherein a detent member for preventing the upper base frame from being displaced is provided on the web portion directly below the support member. It is provided on the lower surface.

  According to this configuration, the undulation-accommodating temporary protection fence is provided with the slip prevention member, so that the undulation-accommodating temporary protection fence stacked above can be prevented from being displaced and dropped.

It is a front view of the assembly completion state of the temporary protection fence of 1st Embodiment of this invention. It is a front view of the state where the temporary protection fence of this embodiment was laid down. (A) is an expansion perspective view of the assembly completion state which abbreviate | omitted the guard rail of the one side of a temporary protection fence, (b) is an enlarged front view of an assembly completion state. (A) is an enlarged perspective view of the temporary protection fence in a fallen state, (b) is an enlarged perspective view in which the guard rails on both sides are omitted, and (c) is an enlarged front view in a fallen state. (A) is a perspective view of a 1st support plate and a slip prevention plate, (b) is the same front view. (A) is a perspective view of a 2nd support plate, (b) is the same front view. It is a front view of a rotation board. (A) is a front view of the fixing plate, (b) is a plan view thereof, and (c) is a side view thereof. (A) is a front view of a bracket, (b) is the same top view. (A) is a front view of a reinforcement board, (b) is the same top view, (c) is the same side view. It is sectional drawing cut | disconnected along the II cross section of FIG. It is a front view of a connection plate. It is a front view which shows the temporary protection fence (attachment state of a glare prevention net) of 2nd Embodiment. It is an expansion perspective view of the attachment state of the glare prevention net | network of the embodiment. It is a front view of the prevention net | network support | pillar of the embodiment. The temporary protection fence of 3rd Embodiment is shown, (a) is an expansion perspective view of the assembly completion state of a temporary protection fence, (b) is an enlarged front view of an assembly completion state. The temporary protection fence of 3rd Embodiment is shown, (a) is an expansion perspective view of a temporary protection fence, (b) is an enlarged front view of the state which laid down.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an assembled state of the hoisting and housing type temporary protective fence 1 (hereinafter referred to as temporary protective fence 1) according to the first embodiment, and FIG. 2 shows a state where the temporary protective fence 1 has been laid down. The temporary protection fence 1 is one in which the above two states change with each other along with transportation, installation, removal, and the like.

  As shown in FIGS. 1 and 3 (a) and 3 (b), the temporary protective fence 1 includes a base frame 2, four pairs of fixing plates 3, 3 (fixing members), four rotating plates 4, It is composed of four pairs of reinforcing plates 5 and 5 (reinforcing members) and two pairs of guard rails 6 and 6. The temporary protective fence 1 is preferably made of metal, for example, iron.

  The temporary protective fence 1 has a pair of guard rails 6 on both surfaces of the rotating plate 4 and is used to separate the up lane and the down lane.

  The foundation frame 2 is an H-shaped steel having flange portions 21 and 21 and a web portion 22, and extends upward in the longitudinal direction Y (the direction in which the foundation frame 2 extends) and is an upper portion that is a recess that opens upward. A space 24a and a lower space 24b which is a recess opened downward are formed. Four joint mounting holes 26 (see FIG. 1) are formed at predetermined intervals at both end portions of the flange portions 21 and 21. 200, 250, 300, 350, 400, 500 mm etc. are illustrated by the horizontal width dimension (outer dimension of the transversal direction X) of H-section steel.

  As shown in FIG. 11, the joint bolt 221 is inserted into the joint mounting hole 26 via the connecting plate 120 and is screwed and fixed by the nut 222. Thereby, the foundation frame 2 can be mutually connected. As shown in FIG. 12, the connecting plate 120 is a rectangular plate, and a hole 121 corresponding to the joint mounting hole 26 is formed.

  Four pairs of fixing plates 3 and 3 are provided on the upper surface 27 of the web portion at equal intervals or at arbitrary intervals. Note that the mounting positions, the number, and the like of the pair of fixing plates 3 and 3 can be changed as appropriate depending on the relationship between the foundation frame 2 and the guard rail 6. For example, when three sets of guard rails are attached using an even longer foundation frame 2, six pairs of fixing plates 3 and 3 can be used. On the other hand, when a pair of guard rails is attached using the short foundation frame 2, two pairs of fixing plates 3 and 3 can be used.

  As shown in FIGS. 3B and 4C, the pair of fixing plates 3 and 3 are arranged so that the back portions 35 and 35 are parallel to the flange portion 21 with a predetermined gap C therebetween. Yes. Moreover, the distance of each back part 35 and the flange part 21 shows the same example. The gap C is exemplified by a quarter or less of the interval between the flange portions 21 and 21, for example, 5 to 15%. The width of one side of the fixing plates 3 and 3 is not more than one third of the interval between the flange portions 21 and 21, for example, 20 to 30%, and the width of the web portion 22 is not less than that. Is done. The height of the fixing plates 3 and 3 is substantially the same as the height of the guard rail 6. In the standing state of the rotating plate 4, the guard rails 6 and 6 are positioned higher than the fixing plates 3 and 3 (see FIG. 3B), and in the lying state of the rotating plate 4, the fixing plates 3 and 3 and the guard rail 6 and 6 are in the same position (see FIG. 4C).

  As shown in FIGS. 3A, 3B, 8A, and 8B, the fixing plate 3 is a plate having a U-shape in plan view and a rectangular shape in which the front shape is long in the vertical direction Z. The back portion 35 extends in the longitudinal direction Y, and the side portions 36 and 36 extend vertically from both ends of the back portion 35 in the same direction toward the short direction X. A column turning hole 31 is formed at the lower end portion of the back portion 35, and two fixing holes 32 are formed at predetermined intervals in a row in the vertical direction Z. The side portion 36 can increase the horizontal rigidity of the fixing plate 3, and can ensure a predetermined strength against an external force in the horizontal direction and is not easily deformed.

  As shown in FIGS. 3 (a), 3 (b), 4 (a), 4 (b), 4 (c), and FIG. 7, the rotating plate 4 is slidably inserted into the gap C. The rotating plate 4 is a thin plate having a rectangular front shape and a predetermined thickness. The rotating plate 4 stands upright in the up-down direction Z in the upright state and is in the longitudinal direction Y in the lying down state. The thickness of the rotating plate 4 is set in relation to the gap C of the fixing plate 3. The width of the rotating plate 4 is 2 to 5 times the thickness, and the height is 5 to 7 times the width. In the standing state, the rotating plate 4 has a thickness in the lateral direction X, a lateral width in the longitudinal direction Y, and a height in the vertical direction Z. The height of the rotating plate 4 is set higher than the height of the fixing plate 3 in order to attach the guard rail 6. The height and width of the rotating plate 4 are set in relation to the dimensions of the fixing plate 3. The shape of the rotating plate 4 is not limited to a rectangle, and may take an appropriate shape such as a vertically long shape such as an ellipse or an oval.

  The rotating plate 4 has a hole 41 corresponding to the column rotating hole 31 at a lower end portion on a center line extending in the vertical direction Z, and a hole 42 corresponding to the fixing hole 32 above the hole 41 in a vertical direction Z. One is formed. Furthermore, a hole 43 corresponding to the guardrail rotation hole 66 (see FIG. 9) is formed above it, and two holes 44 that are arranged in the longitudinal direction Y are formed above it. The hole 44 is a hole for detachably fixing the anti-glare network 200 for reducing the light of the headlights in the opposite lane according to the second embodiment described later, and is omitted when the anti-glare network 200 is not attached. Also good.

  The column rotation hole 31 and the hole 41 are provided at a position where the rotation plate 4 does not collide with the web upper surface 27 when the rotation plate 4 is laid down. In the present embodiment, the rotating plate 4 is a rectangular plate, but a rounded corner may be provided at the lower end. Thereby, even if the hole 41 is provided at a low position, the collision between the rotating plate 4 and the web portion upper surface 27 can be avoided.

  As shown in FIG. 10, the reinforcing plate 5 is a plate having a U-shaped planar shape, a front shape is a vertically long rectangular shape in the vertical direction Z, and extends in the longitudinal direction Y. It is composed of a pair of side portions 56 and 56 extending vertically from both ends in the short direction X in the same direction. The extending direction of the side part 56 is opposite to the extending direction of the side part 36. Two holes 51 corresponding to the fixed holes 32 are formed in a row in the vertical direction Z at the lower end of the front portion 55. Further, in order to improve the adhesion of the portion in contact with the rotating plate 4, the upper end portion of the side portion 56 has a stepped shape protruding in the direction of the fixing plate 3. The reinforcing plate 5 is configured such that the width in the longitudinal direction Y is smaller than the width of the fixing plate 3. The thickness of the reinforcing plate 5 in the short direction X is made smaller than the thickness of the fixing plate 3. Therefore, it fits in the recess of the fixing plate 3.

  As shown in FIG. 3, the column rotation bolts 45 (first rotation axis) are formed in the column rotation holes 31 and 31 formed in the pair of fixing plates 3 and 3 and the hole 41 formed in the rotation plate 4. Is inserted and a support rotation nut (not shown) is screwed and tightened. Further, two fixing holes 32, 32 formed in the pair of fixing plates 3, 3, two holes 42 formed in the rotating plate 4, and two holes formed in the pair of reinforcing plates 5, 5 A bolt 57 is inserted into each 51 and a nut 58 is screwed and tightened.

  Accordingly, the pair of reinforcing plates 5 and 5 are fixed to the rotating plate 4 via the pair of fixing plates 3 and 3, and the rotating plate 4, the pair of fixing plates 3 and 3, and the pair of reinforcing plates 5. , 5 cooperate to increase the load bearing capacity in the horizontal direction. Further, by removing the nut 58, removing the bolt 57, and further loosening the column rotation nut, the rotation plate 4 can rotate about the column rotation bolt 45 (first rotation axis).

  As shown in FIG. 9, the bracket 65 has a rectangular front portion 68, connection portions 69 and 69 that extend in the same direction perpendicularly from both ends of the back portion 68, and perpendicularly separate from both ends of the connection portions 69 and 69. It has collar portions 70, 70 extending in the direction. A guard rail rotation hole 66 is formed at the center of the back portion 68, and a guard rail fixing hole 67 is formed at the center of the collar portion 70. A concave portion is formed in the bracket 65 on the front side of the central portion in plan view. In the standing state of the rotating plate 4, the bracket 65 is positioned higher than the fixing plate 3, and the upper portion of the reinforcing plate 5 is in contact with the lower portion of the bracket 65. When the rotating plate 4 is in a lying state, the reinforcing plate 5 and the bracket 65 are at the same height.

  As shown in FIG. 1, the guard rail 6 is formed with a hole 62 corresponding to the fixing hole 32 and a hole 63 for joining the guard rails 6 to each other. The guard rail 6 and the bracket 65 are fixed by inserting the guard rail fixing bolt 77 through the hole 62 and the guard rail fixing hole 67 and screwing and tightening the guard rail fixing nut 76. In addition, about the structure of the guardrail 6, since it is a general structure, description is abbreviate | omitted.

  In the state where the guard rails 6 and 6 of the temporary protective fence 1 and the rotating plate 4 are lying down, the guard rail 6 protrudes slightly from both ends of the base frame 2 at both ends, and is shifted from the base frame 2 in the completed state. However, this arrangement can be set appropriately.

  A guard rail rotation bolt 73 (second rotation axis) is inserted into a guard rail rotation hole 66, 66 formed in the pair of brackets 65, 65 and a hole 43 formed in the rotation plate 4, and a guard rail rotation nut (illustrated). (Omitted) is screwed and tightened. The pair of guard rails 6 and 6 are attached to the rotating plate 4 via the pair of brackets 65 and 65 in a state of sandwiching the pair of brackets 65 and 65. That is, the bolt 77 is inserted into the two guard rail fixing holes 67 formed in each bracket 65 and the two holes 63 formed in the guard rail 6, and the nut 76 is screwed and tightened. By loosening the support rotation nut (not shown), the pair of guard rails 6 and 6 can be rotated about the guard rail rotation bolt 73 (second rotation axis) via the pair of brackets 65 and 65. Become.

  The width of one of the pair of guard rails 6 and 6 in the short direction X (direction perpendicular to the longitudinal direction Y and the vertical direction Z) is larger than the width (internal dimension) of the flange portions 21 and 21 in the short direction X. In this example, it is less than half, and 20 to 30% is illustrated in the illustrated example. Accordingly, the pair of guard rails can be accommodated in the upper space 24a.

  When connecting a pair of guard rails 6, 6, the guard rail 6 provided on the front side in the lane traveling direction is disposed outside the guard rail 6 provided on the front side (lane side). In other words, one of the pair of guard rails 6 and 6 is disposed on the outside and the other on the inside (rotating plate side). Thereby, when a vehicle collides with a guard rail, the situation where the edge part of a guard rail stabs in a rear-end collision vehicle, etc. can be avoided.

  As shown in FIG. 1, the pair of first support plates 91, 91 (support members) are provided between the rotating plates 4 and in the vicinity of one end portion of the foundation frame 2. The first support plate 91 is a U-shaped plate that forms a concave portion to be opened, and the pair of first support plates 91 and 91 are opposed to each other while the concave portion is open in the longitudinal direction Y. It is fixed to the web part upper surface 27. Further, when the guard rail 6 is in a lying state, it slightly protrudes above the upper end of the guard rail 6. The first space S1 defined by the pair of first support plates 91, 91 is a first storage box (not shown) for storing bolts, nuts and the like used when the temporary protective fence 1 is assembled on site. ) Is decorated.

  The pair of second support plates 95 and 95 (support members) are provided in the vicinity of the other end of the foundation frame 2. The second support plate 95 is a U-shaped plate having a concave portion to be opened, and the pair of second support plates 95 and 95 has a concave portion that is open in the longitudinal direction Y and faces the web. It is fixed to the part upper surface 27. Further, when the guard rail 6 is in a lying state, it slightly protrudes above the upper end of the guard rail 6. The second space S2 defined by the pair of second support plates 95, 95 is a second storage for storing the connecting plate 120, the joint bolt 221 and the like used when the temporary protective fence 1 is assembled. A box (not shown) is provided.

  As shown in FIG. 5, when the temporary protective fence 1 is stacked upward, the pair of anti-slip plates 97, 97 (the anti-slip member) is a pair of anti-slip plates 97 provided on the upper temporary protective fence 1. The inner edge of 97 is provided on the lower surface 28 of the web portion so as to surround the outer edges of the upper ends of the pair of first support plates 91 and 91 provided in the pair of temporary protection fences 1 below. The stopper plate 97 is a U-shaped plate that forms a concave portion to be opened, and the pair of second support plates 95 and 95 are arranged in a state where the concave portion is open in the longitudinal direction Y and faces the web. It is fixed to the lower surface 28 of the part. In the present embodiment, the pair of anti-slip plates 97, 97 are provided on the web portion lower surface 28 immediately below the pair of first support plates 91, 91, but are directly below the pair of second support plates 95, 95. You may provide in the web part lower surface 28, and may provide in both.

  The temporary protective fence 1 in the assembled state can be brought down from the assembled state, and can be accommodated in the upper space 24 a formed in the foundation frame 2.

  In this case, first, the nut 58 screwed to the bolt 57 is removed, the bolt 57 is removed from the fixing holes 32 and 32, the hole 42 and the hole 51 corresponding to the fixing holes 32 and 32, and the pair of reinforcing plates 5 and 5 are removed. 5 is removed. A column rotating nut (not shown) screwed to the column rotating bolt 45 is loosened. Next, a guard rail rotating nut (not shown) screwed to the guard rail rotating bolt 73 is loosened. Thereby, the rotating plate 4 can be rotated about the support column rotating bolt 45, and the pair of guard rails and the rotating plate 4 can be rotated relative to each other about the guard rail rotating bolt 73. Due to the two central axes of rotation, the pair of guard rails 6 and 6 and the bracket 65 pivot while maintaining a horizontal state and are accommodated in the upper space 24a. The reinforcing plates 5 and 5, the bolts 57, and the nuts 58 are accommodated in the first space S <b> 1 defined by the first support plates 91 and 91. Further, the connecting plate 120, the joint bolt 221 and the like are housed in the second space S2 defined by the pair of second support plates 95, 95.

  From the state in which the temporary protective fence 1 is lying down, the vehicle is stacked and loaded on the vehicle, moved to another location, and is lowered from the vehicle. The work to install in the assembled state at the place where it is lowered may be performed in the reverse order.

  The effect of the temporary protection fence 1 demonstrated above is demonstrated. Since the rotation plate 4 is a plate and has a thickness in the short direction, the rotation plate 4 is disposed between the fixing plates 3 and 3 and can be rotated by two rotation shafts. In a state where the guard rail 6 and the rotating plate 4 are tilted, the web portion 22 formed above the foundation frame 2 can be accommodated in the width in the short direction. With the guard rail 6 and the rotating plate 4 standing, the rotating plate 4 can be fixed by the fixing plate 3 with bolts and nuts. The width in the lateral direction can be reduced as necessary, as compared with a generally used circular tube or square tube support. The temporary protective fence 1 can be reduced in size, weight, and size, and the efficiency of installation / removal work can be improved. It can be used not only for road shoulders and pedestrian road boundaries, but also for separating up lanes and down lanes.

  Since the guard rail 6 is already installed when the rotating plate 4 is erected from the lying down state, even if it is used to separate the upstream lane and the downstream lane, it is temporarily installed without performing a new guard rail mounting operation. Installation work of the protective fence 1 can be performed. As a result, the efficiency of installation work can be improved.

  When the rotating plate 4 is in a fallen state, it is accommodated in a recess formed above the foundation gantry 2, so that the temporary protective fence 1 can be removed without further work. As a result, the removal work can be made more efficient.

  Since the fixing plate 3 has the back portion 35 in the longitudinal direction and the side portion 36 in the short direction, the load resistance in the horizontal direction can be enhanced. Since a plurality of pairs of guard rails 6 and 6 can be provided on one foundation frame 2 because a plurality of pairs are provided at predetermined intervals in the longitudinal direction Y of the foundation frame 2, the length of the temporary protection fence 1 can be increased. Can be planned. As a result, the number of installation / removal of the temporary protective fence 1 can be reduced, and the efficiency of the installation / removal work can be improved.

  Further, the reinforcing plate 5 for securing the load bearing force in the lateral direction X is further provided. The reinforcing plate 5 can be fixed to the rotating plate 4 and the fixing plate 3 by the bolts 57 and nuts 58 as tightening members. Since the load bearing capacity can be secured even if the width in the lateral direction X is further reduced, a more compact structure can be achieved.

  Since the hoisting accommodation type protective fence 1 includes support members 91 and 95 for supporting the upper base frame 2, damage due to the upper base frame 2 coming into contact with the lower guard rail 6 is prevented. For this reason, the temporary protective fence 1 can be stacked without any special work. As a result, it is possible to improve the efficiency of loading / unloading work.

  The support members 91 and 95 are a pair of U-shaped planar plates provided in a state where the recessed portions that are opened face each other, and a space defined by the pair of plates is necessary when assembling the protective fence. Since the parts can be accommodated, the temporary protective fence 1 can be assembled without separately preparing the parts for assembly. As a result, the efficiency of installation work can be improved.

  When the temporary protective fences 1 are stacked, a detent member 97 for preventing the upper base frame 2 from being displaced is provided on the lower surface of the web portion 22 immediately below the support members 91 and 95. Therefore, it is possible to prevent the displacement and fall of the undulating and accommodating temporary protective fence stacked above.

  The temporary guard fence 201 of 2nd Embodiment is demonstrated with reference to FIGS. As shown in FIGS. 13, 14 (a) and 14 (b), the temporary protective fence 201 is provided with an anti-glare device on the upper part of the temporary protective fence 1, and the anti-glare net 200 includes a preventive net column 210 and a preventive net body. 220. The prevention net column 210 has a pair of column connection plates 211 and 211 for detachably fixing to the rotating plate 4. A hole 244 corresponding to the hole 41 is formed in the column connection plate 211. The pair of column connection plates 211 and 211 can be slidably inserted into the rotation plate 4 and can be fixed by inserting bolts 250 through the holes 44 and 244 and screwing nuts (not shown). Since the prevention net body 220 and the like have a general configuration, description thereof is omitted.

  The temporary protection fence 301 according to the third embodiment is the same as the temporary protection fence 1 according to the first embodiment except that the guard rail 6 is attached to only one side of the rotating plate 4 and the other side of the guard rail 6 is not attached to the boundary of the walking road. It is what you use. The part number of the third embodiment is 300, and the illustration and description of the first embodiment are used. According to the present embodiment, since the rotation plate 304 can be positioned at the center of the web portion 327, there is an effect that it is not necessary to deviate toward the end. Furthermore, the temporary protective fence 301 of the third embodiment has an effect that it can be easily changed to the temporary protective fence 1 of the first embodiment only by attaching the additional other bracket 65 and the guard rail 6.

  Although the present embodiment has been described above, it is needless to say that various aspects of the present invention can be appropriately modified or added without departing from the spirit of the present invention. For example, in the present embodiment, the pair of fixing plates 3 and 3 (two fixing plates) are used as the rotation plate 4 that is rotatably fixed, but only one of the fixing plates may be used. Further, although the pair of reinforcing plates 5 and 5 (two reinforcing plates) are used to reinforce the rotating plate 4, only one of the reinforcing plates 5 may be used. Further, although the reinforcing plate 5 is fixed to the rotating plate 4 via the fixing plate 3, it may be directly fixed to the rotating plate 4. Although the base frame 2 is H-shaped steel, it is not limited to this, and it may be groove-shaped steel, which is a combination of plates and is provided with a recess that is long in the longitudinal direction Y and opens upward. It may be. The rotating plate 4 is not limited to a solid plate, but may be another form as long as it is a member made of a plate such as a hollow plate. All the numerical values described in the embodiments are examples.

DESCRIPTION OF SYMBOLS 1 Unraveling type temporary protection fence 2 Foundation stand 21 Flange part 22 Web part 24a Upper space 24b Lower space 26 Hole 27 Web part upper surface 28 Web part lower surface 3 Fixing plate 31 Support | pillar rotation hole 32 Fixing hole 35 Back part 36 Side part 4 times Moving plate C Clearance 41 to 44 Hole 45 Prop rotation bolt (first rotation axis)
5 Reinforcement plate 51 Hole 55 Front portion 56 Side portion 57 Bolt 58 Nut 6 Guard rail 62, 63 Hole 65 Bracket 66 Guard rail rotation hole
67 Guard rail fixing hole 68 Back portion 69 Connection portion 70 Brim portion 71 Guard rail fixing bolt 72 Guard rail fixing nut 73 Guard rail rotation bolt (second rotation axis)
76 Nut 77 Bolt 91 First support plate (support member)
95 Second support plate (support member)
97 Stop plate (Skid member)
120 Connecting plate 121 Hole 200 Anti-glare screen 201 Temporary guard fence 210 Preventing net column 211 Column connecting plate 220 Preventing net body 221 Joint bolt 222 Nut 244 Hole 250 Bolt 301 Temporary guard fence 304 Rotating plate 327 Web part X Short Direction Y Longitudinal direction Z Vertical direction S1, S2 Space

Claims (6)

A base frame that is long in the longitudinal direction and formed with a recess that opens upward;
A fixing member fixed to the upper surface of the web portion of the foundation frame;
A guardrail provided in the longitudinal direction;
A rotating plate-like member having a thickness in the short-side direction, and a lower side end portion of the rotating plate-like member is rotatable about the first rotation axis extending in the short-side direction to the fixing member. And the upper side end portion is attached to the guard rail so as to be rotatable around a second rotation axis extending in the short direction,
When the rotating plate-like member is in a fallen state, the guard rail and the rotating plate-like member can be accommodated in the width in the short direction of the web portion,
A hoisting and receiving type temporary protective fence characterized in that the rotating plate-like member can be fixed to the fixing member by a fastening member when the rotating plate-like member is in a standing state.   The undulating accommodation type temporary protective fence according to claim 1, wherein the fixing member has a longitudinal back portion and a lateral side portion, and a plurality of the fixing members are provided in the longitudinal direction of the foundation frame. .   The undulating housing according to claim 1 or 2, further comprising a reinforcing plate for securing a load bearing force in a short direction, wherein the reinforcing plate can be fixed to the rotating plate member and the fixing member by a fastening member. Temporary protective fence.   The upper portion of the web portion further includes a support member for supporting the upper base frame when the base frame in a state where the guard rail and the rotating plate-shaped member are overlaid is stacked upward. The undulating accommodation type temporary protective fence according to any one of Items 1 to 3.   The support member is a pair of U-shaped planar plates provided in a state where the concave portions facing each other face each other, and the space defined by the pair of plates is a part necessary for assembling the protective fence. The undulating and accommodating temporary guard fence according to claim 4, wherein the undulating and accommodating temporary guard fence can be accommodated.   The undulating accommodation type temporary installation according to claim 4 or 5, wherein a detent member for preventing the upper base frame from being displaced is provided on a lower surface of the web portion immediately below the support member. Guard fence.

Images