Deck plate support

Abstract

The present invention provides deck plate support materials that reduce the effort required to install mounting materials for horizontal nets, etc. [Solution] The deck plate support member 1 has a deck plate mounting section 2 having a vertical section 21 fixed to the side surface 101 of the precast beam 100 and a horizontal section 22 on which the edge of the deck plate 200 rests, and a mounting member 3 provided on the deck plate mounting section 2 for attaching the horizontal net 5. The mounting member 3 has a hooking section 32 for hooking the horizontal net 5 located below the deck plate mounting section 2.

Description

Technical Field

[0001] The present invention relates to a deck plate receiving member for laying a deck plate.

Background Art

[0002] There is a case where a deck plate is laid between a pair of precast beams, and concrete is placed thereon to construct a deck slab. In this case, a deck plate receiving member is fixed to the side surface of each precast beam, and the edge portions on both sides of the deck plate are placed on these deck plate receiving members. Thereby, the deck plate is spanned between the pair of precast beams.

[0003] Until the work floor is completed by laying the deck plates, in order to prevent the fall of workers and the fall of materials, it is necessary to stretch a horizontal net below the deck plates between the pair of precast beams. The precast beam is provided with a hanging bracket as a mounting member for attaching the horizontal net. The horizontal net is hooked and held on the hook of the hanging bracket.

[0004] Examples of such hanging brackets are described in Patent Documents 1 and 2. The hanging bracket of Patent Document 1 is fixed to the side surface of the beam with screws, and the hanging bracket of Patent Document 2 sandwiches the flange of the steel beam and is fixed with a tightening bolt. In addition, as a hanging bracket, there is also one that is screwed into an insert embedded in the side surface of a precast beam, such as an RC net hanger (registered trademark).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] Typically, arranging horizontal nets requires numerous lifting jigs. Securing these jigs to beams increases on-site labor and contributes to project delays.

[0007] This invention has been made in view of the above-mentioned problems, and aims to provide a deck plate support material that can reduce the effort required to install mounting materials for attaching horizontal nets, etc. [Means for solving the problem]

[0008] To achieve the aforementioned objective, the present invention provides a deck plate support member comprising: a deck plate mounting portion having a vertical portion fixed to the side surface of a precast beam and a horizontal portion on which the edge of a deck plate rests; and a mounting member provided on the deck plate mounting portion for attaching a surface material to prevent falling, wherein the mounting member has a hook portion for hooking the surface material located below the deck plate mounting portion.

[0009] In the deck plate support of the present invention, mounting members for hooking and holding surface materials for fall prevention, such as horizontal nets, are provided on the deck plate mounting portion on which the edge of the deck plate rests. Therefore, the installation of the mounting members is completed at the same time as fixing the deck plate mounting portion to the side surface of the precast beam, reducing the effort required to install the mounting members. In addition, since the hooking portion is located sufficiently far below the deck plate, it is possible to prevent the surface material hooked to the hooking portion from being scorched by welding sparks or the like during welding work performed on the deck plate.

[0010] The mounting material is fixed, for example, to the deck plate mounting section and cannot be removed. When mounting materials are left inside the ceiling after the deck slab is constructed, or when mounting materials can be easily cut and removed, the cost of manufacturing the deck plate support material can be reduced by fixing the mounting material to the deck plate mounting area in a way that makes it impossible to detach.

[0011] The mounting material is, for example, a J-shaped steel rod, having a configuration in which the hook portion is continuous from the lower end of the straight portion, and the upper part of the straight portion is welded to the vertical portion of the deck plate mounting portion. Preferably, the upper end of the straight portion abuts against the horizontal portion of the deck plate mounting portion. By using a J-shaped steel rod having the straight section and hook section described above as the mounting material, the manufacturing of the mounting material and its fixing to the deck plate mounting section becomes easier. Furthermore, by positioning the upper end of the straight section against the horizontal section of the deck plate mounting section, the vertical position control of the hook section becomes easier.

[0012] The mounting member may be detachably attached to a mounting jig fixed to the deck plate mounting portion. The mounting jig is positioned, for example, through the mounting member, and the mounting member has a retaining portion to prevent it from falling off the mounting jig. If it is necessary to remove the mounting material after the deck slab has been constructed, the mounting material can be made detachable from the mounting jig fixed to the deck plate mounting area. The removed mounting material can be reused at other sites. In addition, by providing the above-mentioned retaining mechanism, it is possible to reliably prevent the mounting material from falling off the mounting jig. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a deck plate support material that can reduce the effort required to install mounting materials for attaching horizontal nets, etc. [Brief explanation of the drawing]

[0014] [Figure 1] A schematic diagram showing the deck plate support member 1. [Figure 2] Figure 1 shows a cross-section along line AA. [Figure 3] This diagram shows the horizontal net 5 hooked onto the hook portion 32 of the mounting material 3. [Figure 4] An example in which the tip of the hook portion 32 is inclined toward the straight portion 31. [Figure 5] A diagram showing the deck plate support member 10. [Figure 6]Figure showing the deck plate receiving member 10a. [Figure 7] Figure showing the deck plate receiving member 10b. [Figure 8] Figure showing the deck plate receiving member 10c.

Mode for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

[0016] [First Embodiment] FIG. 1 is a diagram showing an outline of a deck plate receiving member 1 according to a first embodiment of the present invention. The deck plate receiving member 1 is used by being fixed to precast beams 100 when a deck plate 200 is laid between a pair of precast beams 100 made of concrete and concrete is placed thereon to construct a deck slab. FIG. 1 shows a cross section of the deck plate receiving member 1 perpendicular to the beam axis direction of the precast beam 100. The beam axis direction of the precast beam 100 corresponds to the direction normal to the plane of the paper in FIG. 1.

[0017] The deck plate receiving member 1 is fixed to each of a pair of precast beams 100, and the deck plate 200 is spanned between the deck plate receiving members 1 fixed to both precast beams 100. In FIG. 1, one of the pair of precast beams 100 and the deck plate receiving member 1 fixed to the precast beam 100 are shown, but the other precast beam 100 and the deck plate receiving member 1 fixed to the precast beam 100 also have the same configuration.

[0018] As shown in FIG. 1, the deck plate receiving member 1 has a deck plate placing portion 2 and a mounting member 3.

[0019] The deck plate placing portion 2 is a member for placing the edge portion of the deck plate 200. The deck plate placing portion 2 has a vertical portion 21 fixed to the side surface 101 in the beam axis direction of the precast beam 100 and a horizontal portion 22 for placing the edge portion of the deck plate 200.

[0020] In this embodiment, an angle material is used as the deck plate mounting section 2. The angle material is a long steel material, and its longitudinal direction is aligned with the beam axis direction of the precast beam 100. The cross section perpendicular to the longitudinal direction of the angle material is L-shaped, with one side becoming the vertical section 21 and the other side becoming the horizontal section 22. The edge of the deck plate 200 is welded and fixed to the horizontal section 22.

[0021] Figure 2 shows a cross-section along line AA in Figure 1. The vertical portion 21 of the deck plate mounting section 2 is fixed to the side surface 101 in the beam axis direction of the precast beam 100 by fasteners 4. The fasteners 4 are, for example, bolts with heads, whose shafts are passed through holes (not shown) in the vertical portion 21 and screwed into inserts (not shown) embedded in the side surface 101 of the precast beam 100. This allows the deck plate mounting section 2 to be tightened and fixed to the side surface 101 of the precast beam 100. The spacing of the fasteners 4 in the beam axis direction of the precast beam 100 is determined by the loads acting on the deck plate 200 during concrete pouring, etc.

[0022] Mounting material 3 is for attaching the horizontal net 5. As shown in Figure 1, mounting material 3 is made by bending a steel rod, such as a reinforcing bar, into a J-shape, and has a configuration in which a hook portion 32 is continuously attached from the lower end of a straight portion 31. The hook portion 32 is the part where the end of the steel rod is bent back into a hook shape, and is used to hook and hold the horizontal net 5. Mounting material 3 can be easily manufactured by performing a general bending process on a steel rod.

[0023] The straight section 31 extends vertically, and its upper part is welded to the vertical section 21 of the deck plate mounting section 2. This fixes the mounting member 3 to the deck plate mounting section 2 in a way that prevents it from being detached. As shown in Figure 2, multiple mounting members 3 are fixed to the precast beam 100 at intervals along the beam axis.

[0024] The welding of the straight section 31 is carried out, for example, in a fabrication plant on the site of a building construction site using precast beams 100. The fixing of the deck plate mounting section 2 to the precast beam 100 is also carried out in a fabrication plant on the site, and the precast beam 100 with the deck plate support member 1 (deck plate mounting section 2 and mounting member 3) fixed to it is lifted by a crane or the like and erected at the desired location. However, the work procedure is not limited to this. For example, the straight section 31 of the mounting member 3 may be welded to the deck plate mounting section 2 in advance at a factory outside the site.

[0025] The upper end of the straight section 31 is abutted against the horizontal section 22 of the deck plate mounting section 2 from below. This allows for the positioning of the straight section 31 during welding and facilitates the vertical position management of the hook section 32.

[0026] The hook portion 32 is located below the deck plate mounting portion 2. The vertical length L1 of the hook portion 32 is set to prevent the horizontal net 5 hooked onto the hook portion 32 from easily coming loose. The length L2 of the straight portion 31 is, for example, about 250 mm, and the hook portion 32 is connected to the straight portion 31 at a position about 250 mm lower than the horizontal portion 22 of the deck plate mounting portion 2. However, the length L2 is not limited to the above and can be set in various ways as long as the hook portion 32 is located below the deck plate mounting portion 2.

[0027] The horizontal net 5 is a fall prevention surface material designed to prevent workers from falling and materials from falling. It is made of wires made of resin or the like arranged in a mesh pattern. The horizontal net 5 is installed after the pair of precast beams 100 have been erected at the desired location, and before the installation of the deck plates 200 begins.

[0028] As shown in the perspective view in Figure 3, the horizontal net 5 is hooked through its mesh using the hook portion 32, and is positioned between the pair of precast beams 100 at a height below the deck plate 200.

[0029] As described above, in the deck plate support member 1 of this embodiment, the mounting member 3 for hooking and holding the horizontal net 5 is provided on the deck plate mounting section 2 on which the edge of the deck plate 200 rests. Therefore, when the deck plate mounting section 2 is fixed to the side surface 101 of the precast beam 100, the installation of the mounting member 3 is completed at the same time, reducing the effort required to install the mounting member 3. In addition, since the hooking section 32 is located at a sufficient distance below the deck plate 200, it is possible to prevent the horizontal net 5 hooked to the hooking section 32 from being scorched by welding sparks or the like during welding work performed on the deck plate 200.

[0030] Furthermore, by making the mounting material 3 a J-shaped steel rod having a straight section 31 and a hooking section 32, the manufacturing of the mounting material 3 and its fixing to the deck plate mounting section 2 becomes easier. Also, by positioning the upper end of the straight section 31 abutting against the horizontal section 22 of the deck plate mounting section 2, the vertical position control of the hooking section 32 becomes easier.

[0031] However, the present invention is not limited to the embodiments described above. For example, the shape of the mounting material 3 is not limited to those shown in Figure 1, etc. As an example, as shown in Figure 4, the tip of the hook portion 32 of the mounting material 3 may be inclined to move closer to the straight portion 31. This makes it more difficult for the horizontal net 5 to slip off the hook portion 32.

[0032] Furthermore, the shape of the deck plate mounting section 2 is not particularly limited, as long as it has a vertical section 21 that is fixed to the side surface 101 of the precast beam 100 and a horizontal section 22 on which the edge of the deck plate 200 is placed.

[0033] Furthermore, in this embodiment, a mesh-like horizontal net 5 is provided as a surface material for fall prevention, but the surface material for fall prevention is not limited to the horizontal net 5; any material that has the function of preventing workers from falling or materials from falling is acceptable.

[0034] In this embodiment, the mounting member 3 is fixed to the deck plate mounting section 2 and is not detachable from the deck plate mounting section 2. However, the mounting member may be detachably attached to the deck plate mounting section 2. An example of a detachable mounting member will be described below as a second embodiment. The second embodiment will mainly describe configurations that differ from the first embodiment, and similar configurations will be omitted from the description by using the same reference numerals in the figures, etc.

[0035] [Second Embodiment] Figure 5(a) shows a cross-section of the deck plate support member 10 according to a second embodiment of the present invention, perpendicular to the beam axis direction of the precast beam 100. The beam axis direction of the precast beam 100 corresponds to the plane normal direction in Figure 5(a).

[0036] As shown in Figure 5(a), the deck plate support member 10 has a deck plate mounting portion 2 and a mounting member 30. The mounting member 30 has the straight portion 31 and hook portion 32, as well as a protruding portion 33 that protrudes horizontally from the upper end of the straight portion 31. The protruding portion 33 is provided on the opposite side of the hook portion 32 in a planar view.

[0037] As shown in Figure 5(b), the protruding portion 33 is passed through a mounting jig 23 fixed to the lower surface of the horizontal portion 22 of the deck plate mounting section 2. Figure 5(b) shows a cross-section along line BB in Figure 5(a). The mounting jig 23 has a U-shaped cross-section, and the protruding portion 33 of the mounting material 30 is passed through its interior.

[0038] The tip of the protruding portion 33 protrudes from the mounting jig 23 toward the precast beam 100. A retaining portion 34 is provided at the tip of the protruding portion 33 to prevent the mounting material 30 from falling off the mounting jig 23. The retaining portion 34 is a plate-shaped member that protrudes downward from the tip of the protruding portion 33 and prevents the mounting material 30 from falling off by catching on the mounting jig 23.

[0039] The retaining portion 34 is rotatable in a vertical plane around the shaft 331 that passes through the tip of the protruding portion 33. When attaching or detaching the mounting material 30, the retaining portion 34 is rotated as shown by reference numeral 34' in Figure 5(a) so that it extends in the same direction as the protruding portion 33. This allows the protruding portion 33 and the retaining portion 34 to be inserted into and removed from the mounting jig 23, thereby enabling the attachment and detachment of the mounting material 30.

[0040] In this embodiment, the same effects as in the first embodiment can be obtained. Furthermore, by attaching the mounting material 30 to the mounting jig 23 in a detachable manner, the mounting material 30 can be removed after the construction of the deck slab and reused at another site. In addition, in this embodiment, by providing the above-mentioned retaining portion 34, it is possible to reliably prevent the mounting material 30 from falling off the mounting jig 23.

[0041] On the other hand, in the first embodiment, the mounting material 3 is fixed to the deck plate mounting section 2 and made non-removable from the deck plate mounting section 2, thereby eliminating the need for the mounting jig 23 and simplifying the fixing configuration. When the mounting material 3 is left inside the ceiling after the construction of the deck slab, or when the mounting material 3 can be easily cut and removed, the cost of manufacturing the deck plate support material 1 can be reduced by fixing the mounting material 3 to the deck plate mounting section 2 in a way that makes it non-removable. Whether to make the mounting material non-removable or removable from the deck plate mounting section 2 can be determined by considering the cost of the mounting material and its installation, the need to remove the mounting material, the number of times the mounting material can be reused, etc.

[0042] Note that the detachable mounting members are not limited to the example shown in Figure 5(a). Figure 6(a) shows a deck plate support member 10a using another detachable mounting member 30a in a cross-section perpendicular to the beam axis direction of the precast beam 100. Similar to the mounting member 30 described above, the mounting member 30a has a configuration in which a protruding portion 33 and a hooking portion 32 are continuous from above and below a straight portion 31. However, a pin with a head 35 is provided that penetrates the protruding portion 33 and the mounting jig 24 as a retaining part to prevent the mounting member 30a from falling off the mounting jig 24.

[0043] Figure 6(b) shows a cross-section along line CC in Figure 6(a). The mounting jig 24 is a pair of plates positioned on both sides of the protruding portion 33 at a distance in the beam axis direction of the precast beam 100 (corresponding to the left-right direction in Figure 6(b)), and is fixed to the lower surface of the horizontal portion 22 of the deck plate mounting portion 2. The pin 35, which is a retaining part, is provided to pass through the mounting jig 24 and the protruding portion 33 that passes between the mounting jig 24.

[0044] A clip or other anti-detachment member 36 is detachably provided at the tip of the pin 35 to prevent the pin 35 from falling off the mounting jig 24 and the protruding part 33. The anti-detachment member 36 prevents the pin 35 from falling off by hooking onto the mounting jig 24. When removing the mounting material 30a from the mounting jig 24, the anti-detachment member 36 is removed from the pin 35, and the pin 35 is then removed from the mounting jig 24 and the protruding part 33.

[0045] Figure 7 shows the deck plate support member 10b using a detachable mounting member 30b in a cross-section perpendicular to the beam axis direction of the precast beam 100. The mounting member 30b is a J-shaped steel rod having a straight section 31 and a hook section 32. A male screw is provided on the upper part of the straight section 31, and this male screw is screwed into a mounting jig 27 fixed to the lower surface of the horizontal section 22 of the deck plate mounting section 2, thereby allowing the mounting member 30b to be detachably attached to the mounting jig 27.

[0046] The mounting jig 27 is a long nut and is welded to the horizontal section 22 at a position away from the precast beam 100 so that the hook portion 32, which rotates in the horizontal plane when the male screw is threaded, does not interfere with the precast beam 100. If there is no problem of interference between the hook portion 32 and the precast beam 100, the mounting jig 27 can also be fixed to the vertical section 21 of the deck plate mounting section 2.

[0047] Figure 8 is a perspective view showing a deck plate support member 10c using a detachable mounting member 30c. In the deck plate support member 10c, a mounting jig 28 is fixed to the vertical portion 21 of the deck plate mounting section 2 by welding or the like. The mounting jig 28 is a cylindrical steel member with a C-shaped cross-section with a slit 281 provided in a part of its circumferential direction.

[0048] The mounting member 30c, like the mounting members 30 and 30a described above, has a configuration in which the protruding portion 33 and the hooking portion 32 are continuous from above and below the straight portion 31, but the protruding portion 33 is provided on the same side as the hooking portion 32 in the plane.

[0049] The mounting material 30c is inserted into the mounting jig 28 through the slit 281. The protruding portion 33 is used as a retaining portion to prevent the mounting material 30c, once passed through the mounting jig 28, from falling out of the mounting jig 28. Specifically, the upper end of the mounting jig 28 is provided with a concave notch 282 in a part of the circumferential direction, excluding the slit 281, and by accommodating the protruding portion 33 of the mounting material 30c within the notch 282, the mounting material 30c is prevented from falling out of the mounting jig 28.

[0050] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but the present invention is not limited to these examples. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the technical idea disclosed herein, and these will naturally also fall within the technical scope of the present invention. [Explanation of Symbols]

[0051] 1, 10, 10a, 10b, 10c: Deck plate support material 2: Deck plate mounting section 3, 30, 30a, 30b, 30c: Mounting materials 4: Fixtures 5: Horizontal net 21: Vertical section 22:Horizontal part 23, 24, 27, 28: Mounting jigs 31: Straight section 32: Hook part 33:Protrusion 34: Retaining part 35: Pin 36: Anti-detachment component 100: Precast beam 101: Side view 200: Deck Plate

Claims

1. A deck plate mounting section having a vertical section fixed to the side of the precast beam and a horizontal section on which the edge of the deck plate rests, Mounting material for attaching a surface material to prevent falling, provided on the deck plate mounting section, It has, The mounting material is characterized in that it has a hook portion for hooking the surface material located below the deck plate mounting portion.

2. The deck plate support member according to claim 1, characterized in that the mounting member is fixed to the deck plate mounting portion and cannot be removed.

3. The aforementioned mounting material is a J-shaped steel rod, and has a configuration in which the hook portion is continuous from the lower end of the straight portion. The deck plate support member according to claim 1, characterized in that the upper part of the straight section is welded to the vertical section of the deck plate mounting section.

4. The deck plate support member according to claim 3, characterized in that the upper end of the straight portion abuts against the horizontal portion of the deck plate mounting portion.

5. The deck plate support member according to claim 1, characterized in that the mounting member is detachably attached to a mounting jig fixed to the deck plate mounting portion.

6. The mounting jig is positioned by passing it through the mounting material. The deck plate support member according to claim 5, characterized in that the mounting member has a retaining portion for preventing it from falling off the mounting jig.

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