Elevation-type temporary protective body

Abstract

To expand the degree of freedom of the installation form of a temporary protection fence, to simplify a structure and operation of a temporary protective body having an undulating support, to enhance safety, and to realize space saving.SOLUTION: A temporary protective body 1 includes a first protective body 2, a second protective body 3 provided above the first protective body 2, a support 41 fixed to an upper surface of a web part 21, and an opening 42 provided in the second protective body 3 and allowing the support 41 to penetrate therethrough. The temporary protective body 1 further includes an interval changing member 4 for changing an interval in a height direction H between the first protective body 2 and the second protective body 3 by elevating and lowering the second protective body 3 with respect to the first protective body 2, and a fixing member 5 for maintaining the interval in the height direction H at a specific interval D at an installation position. The second protective body 3 is moved between an installation position and a transport and storage position by moving the second protective body 3 up and down with respect to the first protective body 2 by the interval changing member 4, and the interval changing member 4 is provided in the inner region of an inner diameter width W of the first protective body 2 and the second protective body 3.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a liftable temporary protective structure used in road improvement works and the like. [Background technology]

[0002] During large-scale road improvement projects, temporary guardrails are commonly installed to ensure safety during construction. The installation of these guardrails typically requires the completion of traffic restrictions, such as construction guide signs, electronic bulletin boards, and traffic cones, to ensure a clear construction zone in either the driving or passing lane. The same is true for removal work. In other words, the installation and removal of temporary guardrails must be completed within a limited time frame, including the start and end of traffic restrictions, and the removal of signs and traffic cones after construction ends. Under these extremely time-sensitive circumstances, streamlining the installation and removal of temporary guardrails is essential.

[0003] Patent documents 1 to 3 are inventions that solve the above problem by using an H-shaped steel base to raise and lower the guardrails and posts, and also support temporary protective fences by the guardrails and support parts when they are stacked for storage. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3193356 [Patent Document 2] Patent No. 6334042 [Patent Document 3] Patent No. 6494120 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the construction period for road improvement work itself has become shorter than before, and there is a demand for further speeding up of the entire construction work. There is also a demand for simplification of the installation work of temporary protective fences (even foldable and retractable temporary protective fences are troublesome, and it has become difficult to secure highly skilled workers) in order to reduce traffic congestion caused by road improvement work. Construction work due to aging roads is increasing (conventional temporary protective fences are becoming difficult to handle in terms of specifications and installation work, such as replacement of decks in elevated sections). Emergency construction work due to natural disasters (such as slope collapses) is also increasing (the time from installation request to actual construction is short).

[0006] The temporary protective fences described in Patent Documents 1 to 3 have increasingly found it difficult to adapt to environmental changes during road improvement work, as described above, due to the unique characteristics of the guardrail (beam) and undulating support post structure. The background to the present invention is the demand for greater safety, labor savings (simplicity), space savings, and flexibility in the installation and removal of temporary protective fences. For example, the undulating support post structure is complex, resulting in a large movement distance for the undulating members (guardrail (beam) and support posts). Furthermore, when the temporary protective fence is installed or transported and stored at a location, the guardrail tends to shift and protrude from the longitudinal ends of the H-shaped steel, taking up extra space. Furthermore, there are other areas that require improvement, such as the need for increased safety.

[0007] The temporary protective fences described in Patent Documents 1 to 3 are difficult to install because of their structure, making the installation of guardrails (beams) time-consuming and labor-intensive. The direction of connecting and extending temporary protective fences is also limited, affecting work efficiency. For this reason, due to their structure, it is desirable to install them one by one, starting from the starting point of installation. For example, if installation begins at point A and the connecting and extending work progresses to point B, while another work crew continues installation from point B to point C, the connecting work that began at point A may have to be connected to the temporary protective fence already installed at point B, which is time-consuming and labor-intensive. Furthermore, the intermediate connecting work of temporary protective fences requires skilled workers, raising concerns about poor construction. However, in actual construction work, due to time constraints and the limited number (weight) of temporary protective fences that can be loaded onto a single truck, intermediate connections have become the norm, and countermeasures are needed.

[0008] The temporary protective fences in Patent Documents 1 to 3 are temporary protective fences with a post-raising structure using guardrails (beams). Therefore, when removing them, the specified bolts attached to the continuous guardrails (beams) are removed, and then the components (bolts, other components) that secure the posts upright, the joint plates that connect the H-shaped steel of the foundation frame, and the bolts are sequentially removed to collapse the guardrails and posts and store them away. During this work process, however, more bolts than necessary attached to the guardrails (beams) are removed, resulting in the fence being stored in an unstable state, or there is a lack of understanding of the removal procedures or their complexity, which often results in the fence being given up on being stored and returned.

[0009] In the pillar-raising type, the end of the guardrail (beam) extends beyond the end of the foundation frame of the connected and extended temporary protective fence, and a terminal foundation frame (specifically, a 1m foundation frame) is required at the point where the connected and extended structure ends.

[0010] Furthermore, there are situations where gaps may occur between the foundation frame and the guardrail (beam) at the installation location of the temporary protective fence, so it may be necessary to prevent flying debris and other objects from both the construction zone and the vehicle driving side.

[0011] Therefore, the objective of the present invention is to increase the degree of freedom in the installation configuration of temporary protective fences so that they can be installed in a wide range of configurations, to simplify the structure and operation of temporary protective bodies with undulating supports, to improve workability and safety, and to achieve space savings. [Means for solving the problem]

[0012] In order to solve the above problem, the present invention provides a liftable temporary protective body comprising: a first protective body having a horizontal web portion extending in the longitudinal direction and a pair of flange portions connected to the web portion and extending in the vertical direction, wherein an upper recess is defined by the web portion and the flange portions; a second protective body provided above the first protective body; a support pole fixed to the upper surface of the web portion; and an opening provided in the second protective body through which the support pole passes; a spacing change member that changes the vertical spacing between the first protective body and the second protective body by raising and lowering the second protective body relative to the first protective body; and a fixing member that maintains the vertical spacing at a specific spacing at an installation position; wherein the second protective body is raised and lowered relative to the first protective body by the spacing change member, so that the second protective body moves between the installation position and a transport and storage position where the vertical spacing is set smaller than the specific spacing; and the spacing change member is provided within the width of the first protective body and the second protective body.

[0013] This configuration allows the present invention to expand the flexibility of the installation configuration of temporary protective fences, making them compatible with a wide range of installation configurations. It further simplifies the structure and operation of conventional foldable and storable temporary protective structures that have foldable members, making it easier to install and safer, while also saving space.

[0014] It is preferable to provide a restricting member that restricts the spacing in the height direction to a specific spacing smaller than the specific spacing at the transport and storage position.

[0015] With this configuration, the present invention can improve the safety of the installation and removal work of temporary protective structures.

[0016] It is preferable that, at the installation position, an intermediate protective body is provided long in the longitudinal direction so as to be positioned between the first protective body and the second protective body, and that the intermediate protective body is fixed to the support by an attachment member.

[0017] With this configuration, the present invention can prevent the vehicle body from getting stuck in the temporary protective fence in the event of a vehicle collision, and prevent flying debris from both the construction zone side and the vehicle travel side.

[0018] In the transport and storage position, the intermediate protection body preferably fits within the width of the lower recess of the second protection body.

[0019] With this configuration, the present invention allows for a compact housing structure.

[0020] It is preferable that a restricting member be provided at the transport and storage position to restrict the lowering of the second safety fence, and that the restricting member and the mounting member be integral with each other.

[0021] This configuration allows for compact fixing and restriction of the temporary protective body.

[0022] It is preferable that the fixing member comprises a fixing portion fixed to the upper surface of the second protection body, and a fastening member that fixes the fixing portion to the support pole.

[0023] With this configuration, the present invention allows the second protective body to be fixed to the support pillar from the top surface of the second protective body, thereby simplifying the installation and removal work of the temporary protective body and ensuring safety. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a perspective view of an elevating temporary protective structure according to an embodiment of the present invention. [Figure 2] (a) is a plan view of the installation position of the elevating temporary protective body, (b) is a front view of the same, and (c) is a right side view. [Figure 3] 2(b), (b) is a cross-sectional view taken along IIIB-IIIB in FIG. 3(a), and (c) is a cross-sectional view taken along IIIC-IIIC in FIG. 2(b). [Figure 4] 3(a) is a cross-sectional view taken along line IVA-IVA in FIG. 3(a), (b) is a cross-sectional view taken along line IVB-IVB in FIG. 3(a), and (c) is a cross-sectional view taken along line IVC-IVC in FIG. 3(a). [Figure 5] (a) is a plan view of the transport and storage position of the elevating temporary protective body, (b) is a front view of the same, and (c) is a right side view. [Figure 6] 6(a) is a cross-sectional view taken along line VIA-VIA in FIG. 5, and FIG. 6(b) is a cross-sectional view taken along line VIB-VIB in FIG. 6(a). [Figure 7] 1A is a plan view of a support pole and a support pole support member of a liftable temporary protective body according to an embodiment of the present invention, and FIG. 1B is a perspective view of the same. [Figure 8] 1(a) is a perspective view of the main body of the second protective body, FIG. 1(b) is a plan view of the same, and FIG. 1(c) is a front view of the same. [Figure 9] 1 is a perspective view of a structure in which a plurality of elevating temporary protective structures according to an embodiment of the present invention are connected in the longitudinal direction. [Figure 10] FIG. 10 is a plan view of a structure in which multiple temporary protective structures are connected in the longitudinal direction. [Figure 11] FIG. 10 is a front view of a structure in which multiple temporary protective structures are connected in the longitudinal direction. [Figure 12] 11 is an enlarged plan view of a connecting portion A in FIG. 10. FIG. [Figure 13] FIG. 1 is a perspective view of an example of a liftable temporary protective body in a storage position according to an embodiment of the present invention. [Figure 14] 14A is a right side view of the same, and FIG. 14B is a cross-sectional view taken along line XIVB-XIVB of FIG. [Figure 15] FIG. 14(b) is a partially enlarged view of a row of temporary protective bodies shown in FIG. [Figure 16] 10(a) to 10(j) are right side views showing an outline of a modified second protective body of the elevating type temporary protective body according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, with reference to the drawings, a description will be given of an embodiment of a liftable temporary protective structure 1 (hereinafter referred to as temporary protective structure 1) of the present invention. The temporary protective structure 1 includes a first protective structure 2 having a horizontal web portion 21 extending in a length direction L and a pair of flange portions 22, 23 connected to the web portion 21 and extending in a height direction H, where an upper recess 24 and a lower recess 25 are defined by the web portion 21 and the flange portions 22, 23; a second protective structure 3 provided above the first protective structure 2; a support column 41 fixed to the upper surface of the web portion 21; an opening 42 provided in the second protective structure 3 through which the support column 41 passes; a spacing change member 4 that changes the spacing in the height direction H between the first protective structure 2 and the second protective structure 3 by raising and lowering the second protective structure 3 relative to the first protective structure 2; and a fixing member 5 that maintains the spacing in the height direction H at a specific spacing D (see FIG. 2(b)) at the installed position. The spacing change member 4 allows the second protective body 3 to rise and fall relative to the first protective body 2, thereby moving between an installation position (Figures 1 to 4, Figures 9 to 11) and a transport and storage position (Figures 5 to 6, Figures 13 to 15), and the spacing change member 4 is located in the inner area of ​​the inner diameter width W (Figure 2(a)) of the first protective body 2 and the second protective body 3.

[0026] This configuration allows the temporary protective structure 1 to accommodate a wider range of installation configurations, expanding the degree of freedom in the installation form of conventional temporary protective fences. It further simplifies the structure and operation of conventional foldable and storable temporary protective structures that have foldable members, achieving greater safety and space savings. The elements of the temporary protective structure 1 will be explained below with reference to the drawings.

[0027] As shown in Figures 1 and 2, the main body of the first protective body 2 is an H-shaped steel beam, and end protection parts 26, 27 that protrude in the longitudinal direction L are provided at both ends thereof. Insertion parts 26a, 27a into which posts (not shown) such as a privacy net are inserted are fixed to the end protection parts 26, 27.

[0028] As shown in Figures 1, 2, etc., the second protective body 3 has a horizontal web portion 31 extending in the length direction L, and a pair of flange portions 32, 33 connected to the web portion 31 and extending in the height direction H, and is a protective body in which an upper recess 34 and a lower recess 35 (see Figure 3(a)) are defined by the web portion 31 and the flange portions 32, 33. The main body of the second protective body 3 is an H-shaped steel, and end surface protective portions 36, 37 that protrude in the length direction L are provided at both ends. Insertion portions 36a, 37a into which supports (not shown) such as a privacy net are inserted are fixed to the end surface protective portions 36, 37.

[0029] 3 to 8, the spacing change member 4 has a column support member 43, which is detachably fixed to the web portion 21 by a fastening member 44. A column 41 is fixed to the upper portion of the column support member 43 by an insertion structure. The upper end of the column 41 is provided with a mounting portion 41a (see FIGS. 2, 3(b), 7(a), (b), etc.) for an upper structure (not shown) such as an anti-glare device.

[0030] The pillars 41 (e.g., square pipes) shown in Figure 7 are fixed to the upper surface of the web portion 21 in a vertical direction, and are provided at predetermined intervals in the longitudinal direction L. As shown in Figure 8, openings 42 having a specific shape, for example, a square shape, are provided in the web portion 31 of the second protection body 3, and the pillars 1 pass through the openings 42. The openings 42 are shaped to fit the shape of the pillars 41. The cross-sectional area of ​​the openings 42 is slightly wider than the cross-sectional area of ​​the pillars 41. The second protection body 3 is raised and lowered vertically relative to the pillars 41, thereby taking up an installation position or a transport and storage position.

[0031] The second protection body 3 is raised and lowered vertically along the fixed support pillar 41 relative to the first protection body 2 by a spacing change member 4 having a support pillar 41 and an opening 42 through which the support pillar 41 passes. A positioning member 41b (Figs. 3(a)(c), 6(a), etc.) is provided at the upper end of the support pillar 41. As shown in Fig. 15, etc., the positioning member 41b is set to be housed in the lower recess 35 in the transport and storage position.

[0032] As shown in Figures 3 and 4, the fixing member 5 includes a fixing portion 51, which is an L-shaped plate fixed to the top surface of the second protective body 3; a fastening member 52 that detachably fixes the fixing portion 51 to the outer wall of the support column 41; and a fastening member 53 that detachably fixes the fixing portion 51 to the web portion 31. With this configuration, the temporary protective body 1 can be fixed to the support column 41 from the top surface of the second protective body 3, simplifying the work and ensuring safety. The fixing member 5 is installed only on the top surface of the second protective body 3, eliminating the need to insert an arm into the gap between the first protective body 2 and the second protective body 3, thereby increasing safety. The fixing member 5 reduces the number of fixing bolts, thereby reducing the labor required and speeding up installation and removal work.

[0033] When the temporary protective body 1 is in the transport and storage position, the restricting member 6 prevents the first protective body 2 and the second protective body 3 from coming into close contact with each other, and restricts them to a specific distance C (see Figure 5(b), for example, a gap of 60 mm) that is smaller than the specific distance D. Although the height of the temporary protective body 1 increases slightly during transport and storage, consideration has been given to the safety of workers during the storage work when the second protective body 3 is moved from the installation position to the transport and storage position.

[0034] This restricting member 6 can improve the safety of installation and removal work. As the second protection body 3 is no longer in close contact with the first protection body 2 while it is being raised or lowered, even during normal work, even if the second protection body 3 is accidentally dropped during lifting or lowering work using a crane, a gap is ensured, thereby improving the safety of workers. The same applies during removal work.

[0035] The intermediate protection body 7 is provided elongated in the length direction L so as to be located between the first protection body 2 and the second protection body 3 in the installed position.

[0036] The presence of the intermediate protective body 7 between the first protective body 2 and the second protective body 3 provides a high level of safety and security as a temporary protective body 1 after installation, a high level of completion, and the advantages of safety and labor savings during removal work are achieved. The presence of the intermediate protective body 7 in the temporary protective body 1 can prevent situations such as flying debris and objects from both the construction zone side and the vehicle driving side.

[0037] In the transport and storage position shown in Figures 6, 15, etc., the support posts 4, intermediate protective body 7, and mounting members 13 are arranged to fit within the area of ​​width W of the lower recess 35 of the second protective body 3. This configuration allows the temporary protective body 1 to have a compact storage structure. In this embodiment, the height of the intermediate protective body 7 is set to be smaller than the height of specific interval D and higher than the height of specific interval C. When transported and stored, the intermediate protective body is set to a height that allows specific interval C to be maintained, and is stored in whole or in part within the area of ​​the height of the lower recess 35 of the second protective body 3.

[0038] As shown in Figures 3, 6, 15, etc., an attachment member 13, which is a plate that is U-shaped in plan view and extends in the short direction, is fixed to the support 41 by fastening members 12. The upper end of this attachment member 13 is connected to an L-shaped regulating member 6, forming an inverted T-shaped component in front view. When in the transport and storage position, the regulating member 6 supports the underside of the web portion 31 of the second protection body 3. The back surface of the intermediate protection body 7 is detachably fixed to this attachment member 13 by fastening members 14. The intermediate protection body 7 is provided on both outer sides of the support 41 in the length direction L, but may be provided on one side. Because the attachment member 13 and the regulating member 6 are integrated, the structure is compact.

[0039] The mounting member 13 and the regulating member 6 are integrated, thereby realizing compact fixing and regulation.

[0040] 9 to 12, end protection parts 26, 27, 36, 37 are provided with a connecting function, and temporary protection bodies 1 are connected to each other in the longitudinal direction L by fastening members 28, 29, 38, 39 such as plates or bolts and nuts. Defence plates 81, 91 are fixed to the ends of end protection parts 26, 27, 36, 37.

[0041] The operation of installing and removing the temporary protective body 1 will now be described. The required number of temporary protective bodies 1 in the storage state shown in Figures 13 to 15 are loaded onto a vehicle and transported to the temporary installation site. The temporary protective body 1 is lowered to the temporary installation position using a crane. When the second protective body 3 is lifted by the crane, the lower surface of the web portion 31 of the second protective body 3 is released from the state where it is supported by the regulating member 6, and the second protective body 3 rises along the support pillar 41. When the upper surface of the web portion 31 of the second protective body 3 abuts the positioning member 41b, the vertical distance between the first protective body 2 and the second protective body 3 becomes the specific distance D, and the second protective body 3 reaches the installation position. At this position, the fixing portion 51 fixed to the upper surface of the web portion 31 of the second protective body 3 is fixed to the support pillar 41 using the fastening member 52. 9 to 11, the L-shaped steel bar 100 secures the temporary protective body 1 to the ground. This completes the installation work for one temporary protective body 1. The anti-glare device and the like are secured using the mounting portion 41a, and the privacy net and the like are secured using the insertion portions 26a, 27a, 36a, 37a.

[0042] 9 to 12, another temporary protective body 1 is connected to the installed temporary protective body 1 with fastening members 28, 29, 38, and 39. In this way, the required number of temporary protective bodies 1 are installed and connected, and the protection plates 81 and 91 are fixed, completing the installation work.

[0043] To move the temporary protective body 1 from the installation position to the transportation and storage position, the fastening members 52 are released, and the specific interval D is changed to the specific interval C, and the removal work is carried out in the reverse order of the above.

[0044] As explained above, the temporary protective body 1 can be installed in a variety of ways, from the usual road shoulder installation (single-sided type) to the installation in a central median separating the inbound and outbound lanes (double-sided type), and at the junction where the main line flows out (into) an interchange, making it easy to work on the entrance / exit (opening) where construction vehicles enter the construction zone separated by a temporary protective fence from the main line.The entrance / exit for construction vehicles from the main line can be secured by removing the temporary protective fence in the entrance / exit section just before the start of construction that day, and then reinstalling the removed temporary protective fence when the construction for that day is completed to prevent general vehicles from entering thereafter, which widens the range of installation forms.

[0045] The temporary protective body 1 does not require a separate base frame for the terminal, so a flexible layout (starting point and ending point of the temporary protective fence) can be created on-site.

[0046] Furthermore, after the temporary protective body 1 is transported and stored and brought to the site, it can be raised and lowered in a very simple and quick manner to ensure its installation position. Furthermore, since the structure does not have the troublesome intermediate connections that are found in the pillar-raising type, work can be carried out quickly from multiple starting points on the brought-in temporary protective fence, regardless of the worker's level of skill, and regardless of the extension direction.

[0047] The temporary protective body 1 does not require concern about overlapping guardrails, so it can be easily repurposed on-site, regardless of whether it is on the shoulder side or the median side.By making the temporary protective body 1 shorter than the pillar-raising type, the radius of curvature can be made smaller because there are no guardrail (beam) connections, making it applicable to smart IC construction work, etc.

[0048] The temporary protective body 1 is of the elevating type, so it can respond to environmental changes during road improvement work. In particular, during the installation and removal work of the temporary protective fence, the second protective body 3 moves up and down relative to the first protective body 2, which satisfies the requirements of safety, labor saving (easy construction), space saving, and flexibility.

[0049] The liftable temporary protective body 1 allows for a simplified lifting structure, and the distance the second protective body 3 moves up and down is shorter than the distance traveled by the pillars of the pillar-tilting type.Furthermore, the second protective body 3 can be prevented from shifting and protruding from the flange portions 22, 23 of the first protective body 2, either at the installation position of the temporary protective fence or at the transportation and storage position, thereby not taking up extra space and increasing safety.

[0050] Furthermore, during the installation process, there is no need to remove any extra bolts attached to the guardrail (beam), allowing it to be stored in a stable state, avoiding the need for a lack of understanding or complexity of the removal procedures, and enabling simple construction.

[0051] Furthermore, since there are situations where a gap may occur between the foundation frame and the guardrail (beam) at the installation location of the temporary protective fence, the intermediate protective body 7 can prevent flying debris and objects from both the construction zone and the vehicle driving side.

[0052] An overview of modified forms of the second protection body 3 will be explained with reference to Figures 16(a) to (j). For example, in Figure 16(a), the second protection body 3-1 is a horizontal rectangular tube. In Figure 16(b), the second protection body 3-2 is a horizontal rectangular tube with a smaller diameter than in (a). In Figure 16(c), the second protection body 3-3 is a shape in which two horizontal rectangular tubes are installed in the width direction. In Figure 16(d), the second protection body 3-4 is a horizontal circular tube. In Figure 16(e), the second protection body 3-5 is a shape in which multiple horizontal circular tubes are installed in the width direction and height direction H. In Figure 16(f), the second protection body 3-6 is a shape in which a horizontal channel steel is open upward. In Figure 16(g), the second protection body 3-7 is a shape in which a horizontal channel steel is open downward. In Figure 16(h), the second protection body 3-8 has two horizontally opening channel steel sections installed in the width direction. In Figure 16(i), the second protection body 3-9 has a smaller diameter than in (h). In Figure 16(j), the second protection body 3-10 is longer vertically than in (i).

[0053] Although the present embodiment has been described above, it goes without saying that various modifications and additions to the present invention can be made without departing from the spirit and scope of the present invention. For example, the first protection body 2, the second protection body 3, the spacing change member 4, the fixing member 5, the restricting member 6, the intermediate protection body 7, the end protection portions 26, 27, 36, and 37, etc., are not limited to the shapes and structures shown in the drawings, and any suitable shapes, structures, or combinations thereof can be adopted. For example, the support pillar 41 is not limited to a cylindrical shape and may be a round cylinder, an elliptical cylinder, a C-shaped steel member, an H-shaped steel member, or any other member that functions to support the second protection body. Furthermore, the opening 42 is not limited to a rectangular through-hole and may be any spatial structure that satisfies the function of allowing the support pillar 41 to pass through. [Explanation of symbols]

[0054] 1. Elevating temporary protective structure 2 1st protective body 21 Web Department 22,23 Flange 24 Upper recess 25 Lower recess 26,27 Edge protection part 3 Second protective body 31 Web Department 32,33 Flange 34 Upper recess 35 Lower recess 36,37 Edge protection part 4 Spacing change member 41 Post 41a Mounting part 41b Positioning member 42 Opening 43 Pillar support member 44 Fastening members 42 Opening 5 Fixing member 51 Fixed part 52 Fastening members 53 Fastening members 6 Regulatory elements 7 Intermediate protection 12 Fastening members 13 Mounting material 14 Fastening members 81,91 Defense board

Claims

1. a first protective body having a horizontal web portion extending in the length direction and a pair of flange portions connected to the web portion and extending in the height direction, the web portion and the flange portions defining an upper recess; a second protective body provided above the first protective body; a spacing change member having a support column fixed to the upper surface of the web portion and an opening provided in the second protective body through which the support column passes, the spacing change member changing the spacing in the height direction between the first protective body and the second protective body by raising and lowering the second protective body relative to the first protective body; a fixing member that maintains the heightwise spacing at a specific spacing at the installation position, The second protection body is raised and lowered relative to the first protection body by the interval change member, so that the second protection body moves between the installation position and a transport and storage position where the interval in the height direction is set to be smaller than the specific interval; the spacing change member is provided within the width of the first protection body and the second protection body; A liftable temporary protective structure characterized by the following.

2. 2. The elevating temporary protective structure according to claim 1, further comprising a restricting member that restricts the spacing in the height direction to a specific spacing smaller than the specific spacing at the transport and storage position.

3. 2. The elevating temporary protective structure described in claim 1, wherein an intermediate protective structure is provided elongated in the longitudinal direction so as to be positioned between the first protective structure and the second protective structure at the installation position, and the intermediate protective structure is fixed to the support pole by an attachment member.

4. 4. The elevating temporary protective structure according to claim 3, wherein the intermediate protective structure fits within the width of the lower recess of the second protective structure when in the transport and storage position.

5. 4. The elevating temporary protective body according to claim 3, wherein a restricting member is provided at the transport and storage position to restrict the descent of the second protective body, and the restricting member and the mounting member are integral with each other.

6. 2. The elevating temporary protective structure according to claim 1, wherein the fixing member comprises a fixing portion fixed to the upper surface of the second protective structure, and a fastening member for fixing the fixing portion to the support pole.

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