Installation jig and installation method for sheet material

Abstract

To provide an installation jig and the like to allow carry out installation work to be carried out more simply and safely.SOLUTION: An installation jig 1 is a tool for installing sheet member on a steel plate roof. The installation jig 1 comprises: a rod-like core member 2 on which the sheet member is wound up; holding parts 3 arranged on both end parts of the core member 2 to rotatably hold the core member 2; wheels 4 arranged at both end parts of the core member 2; and a jig body 5 having a grip part 53 connecting the holding parts 3 at both end parts of the core member 2 to each other and allowing the installation jig 1 to be operated through being gripped by an operator.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a laying jig and a method for laying a sheet material, etc.

Background Art

[0002] In the work of replacing an old roof, a net may be installed to prevent workers from falling through the roof. For example, Patent Document 1 describes that both ends of a cylindrical roll around which a net is wound are supported by two workers, and the workers move while rotating the cylindrical roll to spread and lay the net on the roof.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the conventional laying method required a plurality of workers. In addition, each worker had to move largely on the roof when laying the net, which was a risk factor for falling during net laying. Therefore, a method that can lay the net more simply and safely has been demanded.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a laying jig and the like for carrying out laying work more simply and safely.

Means for Solving the Problems

[0006] A first invention for solving the above-described problems is a laying jig for laying a sheet material on a laying target of a building, which includes a rod-shaped core material for winding the sheet material, holding portions provided at both ends of the core material for rotatably holding the core material, wheels provided at both ends of the core material, a jig body that connects the holding portions at both ends of the core material and has a handle portion for an operator to hold by hand and operate the laying jig. The laying jig is characterized by having these components.

[0007] In the present invention, an operator standing at a safe location such as a work floor can operate the laying jig by holding the handle portion of the laying jig by hand without moving greatly, and can simply run the laying jig on the laying target to spread and lay the sheet material on the laying target. Therefore, the laying work can be carried out simply and safely with a small number of people. In addition, the laying jig has a simple configuration in which wheels are provided at both ends of a core material around which the sheet material is wound, and can be easily manufactured and transported.

[0008] It is desirable that a winding prevention member for preventing the sheet material from being wound onto the wheels is provided inside the core material relative to the wheels. This prevents the sheet material from being wound onto the wheels when the laying jig meanders or the like.

[0009] It is desirable that the jig body includes an arm portion extending from the holding portion, a rod-shaped connecting portion connecting the tips of the arm portions, and a rod-shaped handle portion extending from the connecting portion. This provides a simple and easy-to-operate laying jig.

[0010] It is desirable that reinforcing bars are used for the arm portions, and steel pipes are used for the connecting portion and the handle portion. This provides a laying jig with excellent balance between weight and rigidity and easy to operate.

[0011] It is desirable that the length of the connecting portion is adjustable. This allows the laying jig to be applied to sheet materials of different widths.

[0012] The second invention is a method for laying a sheet material using the laying jig of the first invention, wherein an end portion of the sheet material wound around the core material is attached to the object to be laid, the jig body is manually held and operated, and the laying jig is run on the object to be laid, thereby spreading and laying the sheet material wound around the core material on the object to be laid. A method for laying a sheet material, characterized by the above. The second invention is a laying method for laying a sheet material on an object to be laid using the laying jig of the first invention.

Effect of the Invention

[0013] According to the present invention, it is possible to provide a laying jig or the like for more simply and safely performing laying work.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0015] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0016] (1. Laying jig 1) As shown in FIG. 1, in the present invention, the sheet material 7 is laid using the laying jig 1. The sheet material 7 is laid on the steel plate roof 8 of the building to be laid. The sheet material 7 is, for example, a net for preventing falling, and is a net-like member using synthetic fibers or the like.

[0017] The steel plate roof 8 has ridge portions 82 arranged in parallel at intervals. Reference numeral 83 in the figure is a bolt for fixing the steel plate roof 8, and the bolt 83 projects upward from the ridge portion 82.

[0018] The laying operation of the sheet material 7 is performed by an operator standing on the work floor 9 installed on the steel plate roof 8 by operating the laying jig 1. The work floor 9 is a strip-shaped plate material such as an iron plate, and is arranged along the longitudinal direction of the ridge portion 82, but is not limited thereto.

[0019] FIG. 2 is a view showing the laying jig 1. The laying jig 1 includes a core material 2, a holding portion 3, wheels 4, a jig body 5, a winding prevention member 6, and the like.

[0020] The core material 2 is a rod-shaped member for winding the sheet material 7. For example, a steel pipe with high rigidity is used for the core material 2, but it is not limited thereto.

[0021] The holding portion 3 is provided at both ends of the core material 2 and rotatably holds the core material 2. The holding portion 3 is a steel cylindrical member, and the end portion of the core material 2 is passed through the inside thereof.

[0022] The wheels 4 are attached to both ends of the core material 2 outside the holding portion 3. The wheels 4 are members for running the laying jig 1. Note that the "outside" refers to the direction away from the central portion of the core material 2 in the axial direction of the core material 2. The direction toward the central portion of the core material 2 is referred to as the "inside".

[0023] FIG. 3 is a diagram showing the core material 2 and the wheel 4 disassembled. As shown in FIG. 3, the end of the core material 2 is closed by fixing the lid 21 by welding or the like, and bolts 22 are fixed to the outer surface of the lid 21 by welding or the like. The wheel 4 is fixed to the bolt 22 and thus to the core material 2 by passing the bolt 22 through the hole 411 of the wheel 4 and tightening nuts 23 and 24 onto the bolt 22 from both sides of the wheel 4 toward the wheel 4. The nut 24 is a double nut for preventing loosening, but a normal nut may also be used. On the other hand, it is also possible to make both of the nuts 23 and 24 double nuts.

[0024] Return to the description of FIG. 2. The jig body 5 is a member that connects the holding portions 3 at both ends of the core material 2 and is used for an operator to hold by hand and operate the laying jig 1. As shown in FIG. 2, the jig body 5 has an arm portion 51, a connecting portion 52, a handle portion 53, etc.

[0025] The arm portion 51 is a rod-shaped member fixed to the holding portions 3 at both ends of the core material 2 by welding or the like and provided so as to extend from the holding portions 3. For example, reinforcing bars are used for the arm portion 51. A joining member 511 used for joining with the connecting portion 52 is fixed to the tip of the arm portion 51.

[0026] The connecting portion 52 is a rod-shaped member that connects the tips of the arm portions 51 extending from each holding portion 3, and for example, a steel pipe is used. Joining members 521 used for joining with the arm portion 51 are fixed to both ends of the connecting portion 52. By fastening the joining member 521 and the joining member 511 of the arm portion 51 using a fastener such as a bolt or a nut, the arm portion 51 is joined to both ends of the connecting portion 52.

[0027] A mounting plate 54 such as a steel plate is fixed to the central portion in the axial direction of the connecting portion 52 by welding or the like, and one end of the handle portion 53 is attached to this mounting plate 54. The handle portion 53 is a rod-shaped member for an operator to hold by hand and operate the laying jig 1, and is provided so as to extend from the connecting portion 52. For example, a steel pipe is used for the handle portion 53.

[0028] In this embodiment, the above-mentioned end portion of the handle portion 53 is attached to the mounting plate 54 using the U-bolt 541. FIG. 4 is a view showing the attachment location of the handle portion 53, and is a cross-section taken along line A-A in FIG. 2.

[0029] As shown in FIG. 4, the above-mentioned end portion of the handle portion 53 is placed on the mounting plate 54 and fixed to the mounting plate 54 by being pressed against the mounting plate 54 side by the U-bolt 541. Both end portions of the U-bolt 541 pass through holes (not shown) in the mounting plate 54, and nuts 543 are tightened on the protruding portions from the lower surface of the mounting plate 54. As shown in FIG. 2, a plurality (three in the example of FIG. 2) of U-bolts 541 are provided at intervals in the axial direction of the handle portion 53.

[0030] The entanglement prevention member 6 is a member for preventing the sheet material 7 from being entangled with the wheel 4. The entanglement prevention member 6 is, for example, a disk-shaped member made of steel having a hole for passing the core material 2 through the central portion, and is fixed to the core material 2 passed through the hole by welding or the like inside the wheel 4 and the holding portion 3.

[0031] (2. Laying method of the sheet material 7) When laying the sheet material 7, first, as shown in FIG. 5, the sheet material 7 is wound between the entanglement prevention members 6 of the core material 2 of the laying jig 1. Then, as shown in FIG. 6(a), the end portion of the sheet material 7 is attached to the steel plate roof 8. At this time, in this embodiment, as shown in FIG. 7, the mesh of the sheet material 7 is hooked on the bolt 83.

[0032] After that, an operator standing on the work floor 9 holds the handle portion 53 and operates the laying jig 1, and as shown in FIG. 6(b), the wheels 4 of the laying jig 1 are run on the steel plate roof 8 in the direction shown by arrow B (a direction orthogonal to the rib portion 82).

[0033] As a result, the core material 2 rotates, the sheet material 7 wound around the core material 2 is unwound, and is spread and laid on the steel plate roof 8. As shown in FIG. 8, the diameter of the wheels 4 of the laying jig 1 and the height of the core material 2 from the lower surface of the wheels 4 are determined so that the core material 2 does not interfere with protruding portions such as bolts 83 when the laying jig 1 travels. Further, even if the laying jig 1 meanders, the sheet material 7 will not be caught by the wheels 4 due to the winding prevention members 6 at both ends of the core material 2.

[0034] When a predetermined length of the sheet material 7 is laid, as shown in FIG. 6(c), a strip-shaped scaffold board 10 along the direction B is installed on the side of the sheet material 7 to secure a movement path for the operator. A plurality of stands 11 are attached to the scaffold board 10 at intervals in the direction B, and a main rope 12 is spanned between adjacent stands 11.

[0035] Hereinafter, as necessary, by repeating the laying of the sheet material 7 and the installation of the scaffold board 10, the sheet material 7 is laid over the entire required range. In some cases, the work floor 9 may be installed at the required locations. Also, when finally recovering the sheet material 7 after the construction is completed, the end of the sheet material 7 is wound around the core material 2, and the wheels 4 of the laying jig 1 are run in the direction of winding up the sheet material 7.

[0036] Thus, in this embodiment, an operator standing at a safe location such as the work floor 9 can operate the laying jig 1 by holding the handle portion 53 of the laying jig 1 by hand without moving significantly, and can lay the sheet material 7 by simply running the laying jig 1 on the steel plate roof 8. Therefore, the laying work can be carried out simply and safely with a small number of people. Further, the laying jig 1 has a simple configuration in which wheels 4 are provided at both ends of the core material 2 around which the sheet material 7 is wound, and can be easily manufactured and transported.

[0037] Also, in this embodiment, the winding prevention member 6 prevents the sheet material 7 from being caught by the wheels 4 when the laying jig 1 meanders or the like.

[0038] Furthermore, the jig body 5 is composed of the above-described arm portion 51, connecting portion 52, handle portion 53, etc., whereby a simple and easy-to-operate laying jig 1 can be obtained. Also, in the jig body 5, lightweight (and relatively low-rigidity) reinforcing bars are used for the arm portion 51, which is a relatively short part, and high-rigidity (and relatively heavy) steel pipes are used for the connecting portion 52 and the handle portion 53, which are relatively long parts. Thereby, while suppressing the overall weight of the jig body 5, the necessary rigidity is ensured according to the length of each part, and a laying jig 1 with excellent balance between weight and rigidity and easy to operate can be obtained.

[0039] However, the present invention is not limited to the above-described embodiments. For example, as shown in the laying jig 1a of FIG. 9, the connecting portion 52a of the jig body 5a may be configured to be telescopic such as a double cylinder. Thereby, it becomes possible to apply the laying jig 1a to sheet materials 7 having different widths. Regarding the core material 2, a plurality of core materials 2 having different lengths are prepared and those corresponding to the width of the sheet material 7 are used, but the core material 2 may also be telescopic. Also, the length of the handle portion 53 can be adjusted and it is also possible to expand and contract according to the laying length of the sheet material 7.

[0040] Also, the sheet material 7 is installed during the replacement work of the steel plate roof 8, but it is not limited to this. There may be cases where it is installed when it becomes necessary to move to another construction location on the steel plate roof 8, or cases where it is installed for the purpose of preventing the steel plate roof 8 from flying off. In this embodiment, a scaffold board 10 etc. were installed after laying the sheet material 7, but the scaffold board 10 etc. are not essential and are installed according to the purpose. Also, the sheet material 7 is not limited to the above-described fall prevention net and varies according to the laying purpose.

[0041] Also, in the above-described embodiment, the end portion of the sheet material 7 was hooked on the bolt 83 of the steel plate roof 8 and attached to the steel plate roof 8, but the attachment location of the end portion of the sheet material 7 is not limited to this. For example, it can also be attached to various temporary materials provided on the steel plate roof 8.

[0042] In this embodiment, the sheet material 7 is laid on the steel sheet roof 8. However, the laying target is not limited to the steel sheet roof 8, and other roofs or floor parts such as decks provided in buildings may also be used. The laying jigs 1 and 1a of the present invention are also suitable for laying the sheet material 7 on, for example, corrugated steel sheets or expanded metals used for decks and the like.

[0043] As described above, the preferred embodiments of the present invention have been described with reference to the accompanying drawings. However, the present invention is not limited to such examples. It is obvious that those skilled in the art can conceive of various modification examples or correction examples within the scope of the technical idea disclosed in the present application, and it is naturally understood that those also belong to the technical scope of the present invention.

Explanation of Reference Numerals

[0044] 1, 1a: Laying jig 2: Core material 3: Holding part 4: Wheel 5: Jig body 6: Entanglement prevention member 7: Sheet material 8: Steel sheet roof 51: Arm part 52, 52a: Connecting part 53: Handle part

Claims

1. A laying tool for laying a sheet material on a target of a building, A rod-shaped core material around which the sheet material is wound; Holding portions provided at both ends of the core material and configured to rotatably hold the core material; Wheels provided at both ends of the core material; A jig body that connects the holding portions at both ends of the core material to each other and has a handle portion that an operator can hold in his / her hand to operate the installation jig; A laying jig comprising:

2. 2. The installation jig according to claim 1, further comprising a winding prevention member provided on the core material on the inner side of the wheel for preventing the sheet material from being wound around the wheel.

3. The jig body is An arm portion extending from the holding portion; A rod-shaped connecting portion that connects the tips of the arms together; The handle portion has a rod shape and extends from the connecting portion; 2. The installation jig according to claim 1, further comprising:

4. The arm portion is made of a steel bar, 4. The installation jig according to claim 3, wherein the connecting portion and the handle portion are made of steel pipes.

5. 4. The installation jig according to claim 3, wherein the length of the connecting portion is adjustable.

6. A method for laying a sheet material using the laying jig according to any one of claims 1 to 5, Attach an end of the sheet material wrapped around the core material to the installation target; A method for laying sheet material, characterized in that the jig body is held by hand and operated, and the laying jig is run over the object to be laid, thereby spreading and laying the sheet material wrapped around the core material over the object to be laid.

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