Work floor and method for erecting the same

Abstract

To provide a work floor that is erected on a lower flange of a beam to provide a work space.SOLUTION: A work floor 10 for a shed roof is used in a shed roof by being erected between a pair of beams BM made of H-shaped steel. The work floor 10 for a shed roof comprises a floor plate 11 having a rectangular shape in plan view, and a pair of side frames 12 extending in a longer direction of the floor plate 11 at both ends of the floor plate 11 in a shorter direction. A rotary support member 13 and a fixed support member 14 are attached to both ends of the side frames 12 in the longer direction to support the work floor 10 for a shed roof. The rotary support member 13 can displace between a protruding position, in which it protrudes in the longer direction, and a non-protruding position, in which it does not protrude.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a working platform and a method for erecting the working platform, and more particularly to a working platform erected between beams and a method for erecting the working platform. [Background technology]

[0002] Traditionally, an opening was formed between the upper and lower floors of a building under construction, and a temporary staircase was used to guide workers' movement, and a work platform was used to cover the upper part of the opening. In recent years, opening and closing work platforms have become more and more popular, which allow workers to pass through the opening when it is open, and can be used as a work platform when it is closed, by providing the work platform with an opening and closing structure.

[0003] Patent Document 1 describes a work floor having a rectangular frame and an openable floor plate arranged to close the internal space of the frame. The work floor disclosed in Patent Document 1 is assembled in advance in a factory or the like, then transported to the construction site and placed on top of beams made of H-shaped steel assembled between the upper and lower floors. This makes it easy to lay the work floor at the construction site, making it highly convenient. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-044043 A Summary of the Invention [Problem to be solved by the invention]

[0005] The work floor disclosed in Patent Document 1 is highly convenient as a temporary scaffold for work on upper floors, and has been used at many work sites. However, when it is used as a temporary scaffold for work in an attic, the following problems arise. That is, a truss is assembled in the attic to support the load of the roof. Since the truss is supported on the upper surface of the beam, it may not be possible to secure space to lay the work floor disclosed in Patent Document 1 on the upper surface of the beam. In addition, when the work floor is laid on the beam, it is difficult to secure a work space in the limited space in the attic. In addition, such problems may occur when the work floor is laid in a space other than the attic.

[0006] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a work floor that can be erected between the lower flanges of beams to ensure a large work space. [Means for solving the problem]

[0007] The above problem is solved by the work floor of the present invention, which is a work floor that is erected between a pair of beams made of H-shaped steel and comprises a floor plate having a rectangular shape in a plan view, and a pair of long frame members extending in the longitudinal direction of the floor plate at both short end portions of the floor plate, and support members that support the long frame members and the floor plate are attached to both longitudinal end portions of the long frame members, and the support members are attached to at least one of the longitudinal end portions and have a movable support member that is displaceable between a protruding position where it protrudes from the one end portion in the longitudinal direction and a non-protruding position where it does not protrude from the one end portion.

[0008] According to the above configuration, the work floor includes a floor plate having a rectangular shape in a plan view, a pair of long frame members extending in the longitudinal direction at both ends of the short side of the floor plate, and support members attached to both ends of the long frame members, and the support members are displaced between a protruding position protruding in the longitudinal direction and a non-protruding position not protruding. This allows the work floor to be dropped between the beams by positioning the movable support member at the non-protruding position, and the work floor to be erected between the lower flanges of the beams by positioning the movable support member at the protruding position. This makes it easy to erect the work floor, and prevents the work floor from shifting position after erection. Even if other structures are assembled on the beams, the work floor can be erected on the beams using the lower flanges of the beams, and it is possible to secure a work space larger by a dimension corresponding to the height of the beams than when the work floor is laid on the beams.

[0009] The movable support member may rotate relative to the long frame member about a rotation axis extending in the vertical direction, and may be displaced between the protruding position and the non-protruding position. According to the above-mentioned configuration, the movable support member can be easily displaced between the extended position and the non-extended position by rotating the movable support member around the rotation axis extending in the vertical direction, which reduces the workload during the erection work of the work platform.

[0010] The support member may also protrude downward from the lower surface of the long frame member. According to the above-mentioned configuration, since the support member protrudes downward from the bottom surface of the long frame material, the bottom surface of the long frame material is located above the top surface of the bottom flange of the beam. Therefore, even if a diagonal brace is provided at the same height as the bottom flange of the beam, it is possible to erect a work floor between the bottom flanges.

[0011] In addition, the pair of long frame materials may be metal square timbers, and the floor panels may be resin plate bodies having an intermediate layer with a honeycomb core and outer layer materials covering the surface of the intermediate layer on both sides of the intermediate layer. According to the above-mentioned configuration, the work floor can be made lighter while still ensuring the necessary strength for the work floor, which makes it easier to handle and ensures safety during work.

[0012] Furthermore, the above problem is solved by the method for erecting a working floor of the present invention, which is a method for erecting a working floor that is used by erecting it on a pair of beams made of H-shaped steel, and includes a first erection process of dropping one longitudinal end of the working floor, which has a rectangular shape in a plan view, between the pair of beams and placing it on the lower flange of one of the beams, and a second erection process of dropping the other longitudinal end of the working floor between the pair of beams and placing it on the lower flange of the other beam. The second erection process may include a movable support member operation process of, after dropping the other longitudinal end of the working floor between the pair of beams, displacing a movable support member attached to the other end from a non-protruding position where it does not protrude longitudinally from the other end to a protruding position where it protrudes longitudinally, and a placing process of placing the movable support member located in the protruding position on the lower flange of the other beam.

[0013] According to the above configuration, when erecting the end of the work floor on the lower flange of the beam, the movable support member is positioned in the non-protruding position to drop the work floor between the beams, and the movable support member is positioned in the protruding position to place the work floor on the lower flange of the beam. Therefore, the erection work can be easily performed and the work floor can be prevented from shifting position after erection. In addition, even if other structures are assembled on the beam, the work floor can be erected on the beam using the lower flange of the beam, and a larger work space can be secured by a dimension corresponding to the height of the beam compared to the case where the work floor is laid on the beam. Effect of the Invention

[0014] According to the work floor of the present invention, it is installed between the lower flanges of the beams, making it possible to ensure a large work space. [Brief description of the drawings]

[0015] [Figure 1] This is a schematic diagram of the attic space. [Diagram 2] This is an oblique view of the attic work floor viewed diagonally from above. [Diagram 3] This is a bottom view of the attic work floor with the rotating support member in a non-protruding position. [Figure 4] This is a bottom view of the attic work floor with the rotating support member in the protruding position. [Diagram 5] 13 is a diagram showing the state in which the fixed support member is dropped between the beams. FIG. [Figure 6] 13 is a diagram showing a state in which a fixed support member is placed on a lower flange. FIG. [Figure 7] 13 is a diagram showing the state in which the rotation support member is dropped between the beams. FIG. [Figure 8] 13 is a diagram showing a state in which the rotation support member is displaced to a protruding position and placed on the lower flange. FIG. [Figure 9] This is a side view of an attic work floor installed on the lower flange of a beam. [Figure 10] This is a plan view from above of an attic work floor installed on the lower flange of a beam. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an attic work platform 10 according to one embodiment of the present invention (hereinafter, this embodiment) will be described with reference to Figures 1 to 10. However, the embodiment described below is merely an example for making the present invention easier to understand, and does not limit the present invention. In other words, the present invention can be modified and improved without departing from the spirit of the present invention, and of course, the present invention includes equivalents thereof.

[0017] <<Outline of AS Attic Structure>> First, the attic structure AS will be described with reference to FIG. Figure 1 is a schematic diagram of the attic structure AS. As shown in Figure 1, the roof RF of the building is supported by the beams BM (also called rafters) and the truss TR assembled on top of the beams BM. In addition, an attic work floor 10, which corresponds to a work floor, is erected between a pair of beams BM and is used as a scaffold for work in the attic.

[0018] The beam BM is an H-shaped steel extending horizontally. In detail, the beam BM has an upper flange BM1, a lower flange BM2 extending parallel to the upper flange BM1, and a web BM3 connecting the upper flange BM1 and the lower flange BM2 (see FIG. 6). The roof truss TR is assembled on the upper flange BM1 of the beam BM. Meanwhile, the diagonal braces BR are installed as reinforcing materials so as to cross each other on the lower flange BM2 of the beam BM. Therefore, the attic work floor 10 needs to be installed in a position that does not interfere with the roof truss TR and the diagonal braces BR.

[0019] The truss TR stands on the beams BM and supports the roof RF. In detail, the truss TR has vertical members TR1 and diagonal members TR2, and forms a framework called a truss structure to support the roof RF. The structure of the truss TR is not limited to the truss structure shown in Fig. 1. The truss structure of the truss TR may be a fink truss structure, a house truss structure, a trapezoidal truss structure, or the like.

[0020] The attic work floor 10 provides a foothold necessary for workers to inspect or repair the truss TR in the attic. The attic work floor 10 is used by erecting it between the beams BM as shown in FIG. 1. Here, the truss TR is assembled to the upper flange BM1 of the beam BM. Therefore, the attic work floor 10 cannot be erected on the upper flange BM1. In addition, the space in the attic is limited, and a work space must be secured within that space. Therefore, the attic work floor 10 is erected on the lower flange BM2 of the beam BM. This makes it possible to secure a larger work space by a dimension corresponding to the height of the beam BM compared to the case where the attic work floor 10 is erected on the upper flange BM1. The height of the beam BM used in the attic is generally 250 millimeters.

[0021] <<Outline of the Attic Work Floor 10>> FIG. 2 is a perspective view of the attic work floor 10 seen from diagonally above. The attic work floor 10 is preassembled in a factory or the like, then transported to a construction site and erected on the attic beams BM. Therefore, the attic work floor 10 has a size and shape that corresponds to the arrangement of the attic beams BM. Specifically, the attic work floor 10 has a width (short side dimension) of 380 mm and a length (long side dimension, when the rotating support member 13 described later is in the protruding position) of 1800 mm. However, the size and shape of the attic work floor 10 are not limited to this. The relationship between the arrangement of the beams BM and the length of the attic work floor 10 will be described later with reference to FIG. 9 and FIG. 10.

[0022] The attic work floor 10 mainly comprises a floor board 11 having a rectangular shape when viewed from above, a pair of left and right side frames 12 that reinforce the floor board 11, a rotating support member 13 provided at the end of the side frame 12, and a fixed support member 14.

[0023] The floor plate 11 is a plank member that serves as a foothold for workers working in the attic. The floor plate 11 is composed of an intermediate layer having a honeycomb core and outer layer materials that cover the surface of the intermediate layer on both sides of the intermediate layer. More specifically, the intermediate layer has a plurality of cells, each having a regular hexagonal cross section, regularly arranged adjacent to each other. The intermediate layer is covered with an outer layer material made of hard resin. This allows the attic work floor 10 to be lightweight while still maintaining the required strength.

[0024] The left and right side frames 12 extend in the longitudinal direction of the floorboards 11. The side frames 12 are hollow blocks made of metal (aluminum). The arrangement of the frame materials for reinforcing the floorboards 11 is not limited to the arrangement shown in Fig. 2. A reinforcing frame extending in a direction perpendicular to the side frames 12 may be added to the rear surface of the floorboards 11, thereby improving the strength of the attic work floor 10. The side frames 12 correspond to long frame materials.

[0025] Here, the arrangement of the left and right side frames 12 will be described in detail. Fig. 3 is a bottom view of the attic work floor 10 as viewed from below. As shown in Fig. 3, the left and right side frames 12 are disposed inside both ends of the floor board 11 in the short direction. In other words, both ends of the short direction of the floor board 11 have side edge portions 11a to which the side frames 12 are not fixed. Therefore, a worker can grasp the side edge portions 11a when transporting the attic work floor 10 or erecting it on the beams BM, making it easy to handle the attic work floor 10.

[0026] Returning to Fig. 2, a rotating support member 13 and a fixed support member 14 are attached to both longitudinal ends of the side frame 12. The rotating support member 13 and the fixed support member 14 are placed on the lower flange BM2 of the beam BM and play a role in supporting the attic work floor 10. The rotating support member 13 and the fixed support member 14 are hollow aluminum square timbers, and rubber plates 13a, 14a are attached to their undersides. This increases the frictional force between the rotating support member 13 and the fixed support member 14 and the lower flange BM2, preventing the attic work floor 10 from shifting sideways or falling off.

[0027] The rotating support member 13 is attached to one end of the side frame 12 so as to be rotatable about a rotation axis X extending in the vertical direction. More specifically, the rotating support member 13 can be displaced between a non-protruding position (see FIG. 3) where the rotating support member 13 does not protrude from the end of the side frame 12 in the longitudinal direction and a protruding position (see FIG. 4) where the rotating support member 13 protrudes from the end of the side frame 12 in the longitudinal direction. As described later, by positioning the rotating support member 13 at the non-protruding position, the attic work floor 10 can be easily dropped between the beams BM. On the other hand, by positioning the rotating support member 13 at the protruding position, the rotating support member 13 can be easily placed on the upper surface of the lower flange BM2 of the beam BM, and the attic work floor 10 can be prevented from shifting laterally. A method for erecting the attic work floor 10 will be described later with reference to FIGS. 5 to 8.

[0028] The fixed support member 14 is fixed to the end of the side frame 12 opposite the movable support member. The fixed support member 14 does not protrude in the longitudinal direction from the end of the side frame 12. More specifically, the fixed support member 14 is attached so that its longitudinal end is flush with the longitudinal end of the side frame 12. In the following explanation, of both longitudinal ends of the attic work floor 10, the end on which the rotating support member 13 is arranged will be referred to as the "rotating support member side end," and the end on which the fixed support member 14 is arranged will be referred to as the "fixed support member side end."

[0029] <<How to erect the attic work floor 10>> Next, a method for erecting the attic work floor 10 will be described. First, as shown in Fig. 5, the fixed support member side end of the attic work floor 10 is dropped between a pair of beams BM (corresponding to the first erection step). In more detail, while the rotating support member side end of the attic work floor 10 is positioned above the upper flange BM1 of the beam BM, the fixed support member side end is dropped below the upper flange BM1 of the beam BM.

[0030] Next, as shown in Fig. 6, the fixed support member 14 is placed on the lower flange BM2 (corresponding to the first erection step). In detail, first, the fixed support member side end of the attic work floor 10 is pressed against the side surface of the web BM3 of the beam BM. Next, the fixed support member 14 is placed on the upper surface of the lower flange BM2 of the other beam BM. By pressing the fixed support member side end of the attic work floor 10 against the side surface of the web BM3 in this way, it is possible to easily position the attic work floor 10 and place it on the lower flange BM2.

[0031] As described above, the rubber plate 14a is attached to the lower surface of the fixed support member 14. Therefore, when the fixed support member 14 is placed on the lower flange BM2, occurrence of lateral displacement of the fixed support member 14 with respect to the lower flange BM2 is suppressed.

[0032] 7, the rotating support member side end of the attic work floor 10 is dropped between the beams BM (corresponding to the second erection step). In detail, while the fixed support member side end of the attic work floor 10 is pressed against the side surface of the web BM3 of one beam BM, the rotating support member side end is dropped below the upper flange BM1 of the other beam BM.

[0033] Next, as shown in Fig. 8, the rotating support member 13 is rotated relative to the side frame 12 (corresponding to the second erection step and the movable support member operating step). As a result, the rotating support member 13 is displaced from a non-protruding position where it does not protrude longitudinally from the end of the side frame 12 to a protruding position where it protrudes longitudinally. By displacing the rotating support member 13 to the protruding position, the length of the attic work floor 10 becomes approximately equal to the inside dimension of the webs BM3 of the pair of beams BM. Therefore, the attic work floor 10 can be easily positioned and the attic work floor 10 can be reliably prevented from falling off.

[0034] Finally, the rotation support member 13 is placed on the lower flange BM2 (corresponding to the second installation step and the placement step). As described above, the rubber plate 13a is attached to the lower surface of the rotation support member 13. Therefore, when the rotation support member 13 is placed on the upper surface of the lower flange BM2, the occurrence of lateral displacement of the rotation support member 13 with respect to the lower flange BM2 is suppressed. This completes the erection work of the attic work floor 10 on the pair of beams BM.

[0035] Fig. 9 shows a side view of the attic work floor 10 erected on a pair of beams BM, and Fig. 10 shows a plan view. As shown in Figs. 9 and 10, the attic work floor 10 is erected on the lower flange BM2 of a pair of beams BM. Therefore, even if the truss TR is assembled on the upper flange BM1 of the beam BM, it is possible to erect the attic work floor 10 on the beam BM. Also, compared to erecting the attic work floor 10 on the upper flange BM1, it is possible to secure a larger work space by a dimension corresponding to the height of the beam BM.

[0036] Next, with reference to Fig. 9 as an example, the relationship between the arrangement of the beam BM and the length of the attic work floor 10 will be described. Here, it is assumed that a pair of beams BM are arranged in parallel at an interval of 1820 millimeters. At this time, the inner dimension (S1) between the webs BM3 of the pair of beams BM is approximately equal to 1820 millimeters (precisely, the thickness of the web BM3 needs to be considered). Also, the inner dimension (S2) between the upper flange BM1 (or lower flange BM2) of one beam BM and the web BM3 of the other beam BM is approximately equal to 1770 millimeters, which is obtained by subtracting half of the width (100 millimeters) of the upper flange BM1 (or lower flange BM2) from S1 (precisely, the thickness of the web BM3 needs to be considered). Moreover, the inner dimension (S3) between the upper flanges BM1 (or lower flanges BM2) of the pair of beams BM is equal to 1720 millimeters, which is obtained by subtracting the width of the upper flange BM1 from 1820 millimeters.

[0037] On the other hand, when the rotary support member 13 is in the non-protruding position, the length (L1) of the attic work floor 10 is 1760 millimeters. In other words, when the rotary support member 13 is in the non-protruding position, the length of the attic work floor 10 is greater than the inner dimension (S3) between the lower flanges BM2 of the pair of beams BM and smaller than the inner dimension (S2) between the upper flange BM1 of one beam BM and the web BM3 of the other beam BM. That is, the relationship of S3 < L1 < S2 holds among L1, S2, and S3. Thereby, with the rotary support member 13 in the non-protruding position, the attic work floor 10 can be dropped between the pair of beams BM.

[0038] Also, when the rotary support member 13 is in the protruding position, the length (L2) of the attic work floor 10 is 1,800 millimeters. In other words, the length of the attic work floor 10 is greater than the inner dimension (S2) between the lower flange BM2 (or the upper flange BM1) of one beam BM and the web BM3 of the other beam BM when the rotary support member 13 is in the protruding position, and is smaller than the inner dimension (S1) between the webs BM3 of the pair of beams BM. That is, the relationship S2 < L2 < S1 holds among L2, S1, and S2. Thereby, after dropping the attic work floor 10 between the pair of beams BM, the rotary support member 13 can be displaced to the protruding position to install the attic work floor 10 between the pair of beams BM, and lateral displacement and dropping of the attic work floor 10 can be reliably prevented.

[0039] Also, as shown in FIG. 9, the rotary support member 13 and the fixed support member 14 are attached to the lower surface of the side frame 12 and protrude downward from the lower surface of the side frame 12. Therefore, when the attic work floor 10 is installed on the lower flange BM2, the lower surface of the side frame 12 is located above the upper surface of the lower flange BM2. Accordingly, as shown in FIG. 10, even when the cross bracing BR is attached in the vicinity of the lower flange BM2, it is possible to install the attic work floor 10 on the lower flange BM2.

[0040] As described above, the attic work floor 10 according to one embodiment of the present invention has been described. However, the above-described embodiment is merely an example for facilitating the understanding of the present invention and does not limit the present invention. In the above-described embodiment, the attic work floor 10 used when performing inspection work and maintenance work on the attic unit TR in the attic and the installation method of the attic work floor 10 have been described, but the present invention is not limited thereto. The present invention can be applied to a work floor used in a place other than the attic (for example, a space between an upper floor and a lower floor) and an installation method of the work floor.

[0041] In addition, in the above-mentioned embodiment, it has been described that one attic work floor 10 is erected between a pair of beams BM, but the number of attic work floors 10 erected between the beams BM is not limited to one, and it goes without saying that two or more attic work floors 10 may be installed side by side.

[0042] In the above embodiment, the rotating support member 13 is rotatably attached to the side frame 12, but the present invention is not limited to this. As long as the movable support member can be displaced between the protruding position and the non-protruding position, a support member that can slide in the longitudinal direction of the side frame 12 may be attached to the end of the side frame 12.

[0043] In the above embodiment, the floorboard 11 is described as a resin plate having an intermediate layer with a honeycomb core and an outer layer material covering the surface of the intermediate layer, but is not limited thereto. The floorboard 11 may be a wooden plate. Even in this case, it is possible to secure a working space in the attic by erecting the floorboard 11 on the lower flange BM2 of the beam BM in the same manner as in the above embodiment.

[0044] In addition, anti-slip tape may be attached to the upper surface of the floorboard 11 to prevent workers from falling over, and a warning sign indicating the maximum load weight may be attached. This makes it possible to improve safety at the construction site.

[0045] In the above embodiment, a rubber plate is attached to the lower surface of the rotation support member 13 and the fixed support member 14, but this is not limited to the above. As long as a frictional force is generated between the rotation support member 13 and the upper surface of the lower flange BM2, and the rotation support member 13 and the fixed support member 14 can be prevented from shifting sideways or falling off, a urethane plate may be attached. [Explanation of symbols]

[0046] 10 Attic work floor (work floor) 11 Floorboards 11a Side edge 12 Side frame (long frame material) 13 Rotating support member 13a Rubber Plate 14 Fixed support member 14a Rubber Plate AS Attic structure BM beam BM1 Upper flange BM2 Lower flange BM3 Web BR Bracing RF Roof TR hut assembly TR1 vertical member TR2 Diagonal

Claims

1. A work platform used by erecting it between a pair of beams made of H-shaped steel, A floor panel having a rectangular shape in a plan view; A pair of long frame members extending in the longitudinal direction of the floor panel at both ends in the short side direction of the floor panel, Support members for supporting the long frame material and the floorboards are attached to both ends of the long frame material in the longitudinal direction, The work floor is characterized in that the support member has a movable support member attached to at least one end in the longitudinal direction and displaceable between a protruding position in which it protrudes from the one end in the longitudinal direction and a non-protruding position in which it does not protrude from the one end.

2. The work platform according to claim 1, wherein the movable support member rotates relative to the long frame member about a rotation axis extending in the vertical direction and is displaced between the protruding position and the non-protruding position.

3. 2. A work floor according to claim 1, wherein the support members protrude downward from the lower surfaces of the long frames.

4. The pair of long frames are metal square members, The work floor according to claim 1, characterized in that the floor panel is a resin plate having an intermediate layer having a honeycomb core and an outer layer material covering the surface of the intermediate layer on both sides of the intermediate layer.

5. A method for erecting a work platform that is used by erecting it on a pair of beams made of H-shaped steel, comprising: A first erection process in which one end of the work floor having a rectangular shape in a plan view in a longitudinal direction is dropped between the pair of beams and placed on a lower flange of one of the beams; A second erection process of dropping the other end of the work floor in the longitudinal direction between the pair of beams and placing it on the lower flange of the other beam, The second erection step includes a movable support member operation step of displacing a movable support member attached to the other end of the work floor from a non-protruding position where the movable support member does not protrude from the other end in the longitudinal direction to a protruding position where the movable support member protrudes in the longitudinal direction after the other end of the work floor is dropped between the pair of beams; A method for erecting a work floor, comprising a placing step of placing the movable support member located in the protruding position on the lower flange of the other beam.

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