Fall prevention fence

Abstract

To provide a fall prevention fence made of simple, general-purpose materials that allows construction workers working at high places such as repairing roof surfaces and installing solar panels on roof surfaces, to work safely without any accidents such as falling tools or themselves.SOLUTION: A fall prevention fence comprises: a plurality of posts 1 arranged perpendicularly to a roof slope; connecting members 2 installed between neighboring posts 1, 1; and a planar member 3 stretched between the posts 1, 1 or between the connecting members 2, 2. The post 1 comprises: a horizontal piece 12 following the roof slope; a vertical piece 11 facing upward; and a curved portion 13 connecting a lower end of the vertical piece 11 to an eaves end of the horizontal piece 12.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fall prevention fence that is composed of simple and general-purpose members, and enables construction workers performing work at high places such as roof repairs and installation work of solar panels on the roof surface to work safely without accidents such as dropping of tools or themselves.

Background Art

[0002] External members such as solar panels arranged on the roof surface of a building can be installed with large-scale equipment using large cranes in the suburbs. However, in general houses and the like installed in urban areas, it is often difficult to install working scaffolding devices around them. In addition, workers performing roof repairs or installing lightning rods on the roof surface may, for example, in the event of sudden weather changes or gusts of wind, drop the tools they are using or themselves, resulting in accidents.

[0003] Therefore, for example, Patent Document 1 proposes a fence framework for roof construction composed of an eaves-edge type framework arranged at the eaves edge and a gable type framework arranged at the gable. By using this fence framework, a film body can be stretched to prevent dust, splashes of washing water, etc. generated during roof construction from scattering around. In addition, Patent Document 2 proposes a device for working on the roof composed of a main rope support, a connecting and fixing fitting, an auxiliary fitting, and a main rope or a net. By using this fall prevention device, it is possible to prevent people or objects from falling from the roof. Furthermore, Patent Document 3 proposes an eaves-edge fixing fitting for attaching the end of a main rope installed on the roof in order to prevent the falling disasters of workers on the roof of a low-rise house. By using this eaves-edge fixing fitting, it is possible to prevent the falling disasters of workers on the roof of a low-rise house.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] However, in Patent Documents 1 to 3, the number of members constituting each device is extremely large, and it can be easily inferred that the overall weight also increases. It can be easily inferred that the work of assembling these devices or the work of installing the assembled device on the roof (eaves) is extremely difficult. That is, even if a particularly complex member among a large number of constituent members is assembled in a factory or on the ground in advance and then transported to the roof (eaves), it can be easily inferred that the transportation work is difficult.

[0006] Therefore, an object of the present invention is to propose a fall prevention fence composed of simple and general-purpose members, which enables a construction worker to work safely without causing accidents such as the use of tools or his own fall during high-place work such as roof surface repair or installation of solar panels on the roof surface. [Means for Solving the Problems]

[0007] The present invention is proposed in view of the above, and is a fall prevention fence comprising a plurality of columns arranged perpendicular to the roof slope, a connecting member installed between adjacent columns, and a planar member stretched between the columns or between the connecting members. The column is characterized by comprising a horizontal piece portion along the roof slope, a vertical piece portion facing upward, and a curved portion connecting the lower end of the vertical piece portion and the eaves end of the horizontal piece portion.

[0008] Further, the present invention also proposes a fall prevention fence, wherein in the fall prevention fence, the column further comprises a reinforcing portion connecting between the vertical piece portion and the horizontal piece portion.

Advantages of the Invention

[0009] The fall prevention fence of the present invention is composed of simple and general-purpose members for its forming columns, connecting members, and planar members respectively. In high-place operations such as roof surface renovation and installation construction of solar cells on the roof surface, construction workers who perform operations without building a scaffold around the building can perform operations safely without causing accidents such as the falling of tools or themselves.

[0010] In addition, when the column further includes a reinforcing portion connecting between the vertical piece portion and the horizontal piece portion, since the shape maintaining strength of the column is reinforced, the support strength of the planar member attached thereto is also improved.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

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Figure 6

Modes for Carrying Out the Invention

[0012] The fall prevention fence of the present invention comprises a plurality of support columns arranged perpendicular to the roof slope, connecting members installed between adjacent said support columns, and a planar member stretched between said support columns or between said connecting members. The support columns are characterized by comprising a horizontal piece portion along the roof slope, a vertical piece portion facing upward, and a curved portion connecting the lower end of the vertical piece portion and the eaves tip of the horizontal piece portion.

[0013] This fall prevention fence consists of a plurality of support columns arranged perpendicular to the roof slope as described above, connecting members installed between adjacent said support columns, and a planar member stretched between the support columns or between the connecting members. As a structure for arranging the support columns perpendicular to the roof slope, the horizontal piece portion of the support column may be fixed to a base metal fitting such as an angle pipe attached perpendicular to the roof slope as shown in the illustrated embodiment described later with a fixing tool, or the horizontal piece portion of the support column may be fixed in a holding state to a support fitting attached perpendicular to the roof slope.

[0014] The support columns arranged perpendicular to the roof slope comprise a horizontal piece portion along the roof slope, a vertical piece portion facing upward, and a curved portion connecting the lower end of the vertical piece portion and the eaves tip of the horizontal piece portion as described above, and are preferably formed of a circular pipe material (round pipe material) having light weight and strength as shown in the illustrated embodiment described later. For example, if a part of it is bent to form a curved portion, one side can be used as the horizontal piece portion and the other side as the vertical piece portion, and the support column can be easily formed (molded) with a single round pipe material. When forming the support column by molding this single round pipe material, it may be molded at an appropriate angle on-site (on the roof surface). Moreover, when the support column is formed by molding such a single round pipe material, it becomes easy to attach the reinforcing portion described later. Although it is not molding of a single round pipe material, an auxiliary column may be connected by a joint so that the length can be adjusted (extended) in the height direction at the upper end of the vertical piece portion.

[0015] Also, by using two straight pipe materials formed in advance to a predetermined length as a horizontal piece part and a vertical piece part, and connecting their ends to a round pipe material (curved part) formed in a curved shape, a support column composed of a total of three round pipe materials can be formed. As for the structure for connecting the three round pipe materials, any known means may be adopted. For example, a thick-diameter connection receiving part may be formed at the end of one round pipe material, a thinner-diameter connection part may be formed at the end of the other round pipe material, and they may be filled and a fixing pin may be fastened from the side. Moreover, it is desirable that this support column further includes a reinforcing part for connecting between these vertical piece part and horizontal piece part. As long as this reinforcing part can be attached between the vertical piece part and the horizontal piece part, for example, it may be formed in a curved shape similar to or different from the above-mentioned curved part, and any known structure may be adopted for its connection structure.

[0016] Since the structure of the support column is simple in this way, it can be formed particularly with a general-purpose round pipe material or the like that is lightweight and has strength, and the material is easily available. Whether it is formed by curving a part of a single round pipe or by connecting three round pipe materials (horizontal piece part, vertical piece part, curved part), it can be formed extremely easily. Also, for its installation, as shown in the illustrated embodiment described later, with a safety rope attached to the upper end of the vertical piece part, the horizontal piece part may be fixed to a base fitting or a support fitting, and it can be attached extremely easily.

[0017] The connecting material installed between adjacent said support columns is preferably formed of a round tube material (intentionally given a different notation to distinguish it from the "round pipe material" forming the support column) that is lightweight and has strength, as shown in the illustrated embodiment described later. Both this round tube material and the round pipe material forming the support column may be in a rectangular tube shape or a polygonal tube shape in order to prevent rolling on the roof slope. This connecting member only needs to have at least the arrangement interval between adjacent columns, and may be formed to have a length spanning multiple intervals, and may be provided inside or outside the columns. If it is possible to make the lower end of the "planar member" described later follow (adjoin) the roof surface, its attachment is not particularly limited. Also, if at least two connecting members are arranged at a predetermined interval, a rectangular grid can be formed by the vertical piece of the column and this connecting member, and higher strength can be constructed by compensating for the respective strengths compared to only the columns or only the connecting members. By forming an attachment hole by crushing the end of the cylindrical member used as this connecting member, it can be easily attached to the column with bolts and nuts, or the connecting members can be connected to each other. Alternatively, this connecting member may be made length-adjustable by combining, for example, a thick outer cylindrical member and a thinner inner cylindrical member.

[0018] As described above, the connecting member has a simple structure and does not require processing or the like by itself. Therefore, it can be formed particularly from a general-purpose square tube or the like that is lightweight and has strength. The material is easily available. It is only necessary to fix two square tubes to the vertical piece of the column at a predetermined interval, so it can be assembled extremely easily.

[0019] The planar member may be a net-like material such as a net stretched between the columns or between the connecting members, or a lightweight assembled member, and may be attached to one or both of the columns and the connecting members. Any known attachment structure to the columns or the connecting members may be adopted.

[0020] As described above, the planar member has a simple structure and does not require processing or the like by itself. Therefore, it can be formed particularly from a general-purpose net or assembled member that is lightweight and has strength. The material is easily available. It only needs to be stretched between the columns, between the connecting members, or both, so it can be assembled extremely easily. From the perspective of preventing the fall of "members" or the like, this planar member only needs to be installed (slackened) on the roof surface "without gaps".

[0021] As described above, in the fall prevention fence of the present invention, the plurality of columns having the above-described configuration are structured such that the lateral piece portions of the columns are fixed to base metal fittings or support metal fittings attached so as to be orthogonal to the roof gradient. The construction procedure is not particularly limited, but is generally carried out in the order of first installing a plurality of columns, then installing connecting members, and finally installing planar members.

[0022] As described above, each member constituting the fall prevention fence of the present invention, including columns, connecting members, planar members, and additionally base metal fittings or support metal fittings for attaching the columns, is composed of extremely simple and general-purpose members. In high-place work such as roof surface repair or installation work of solar cells on the roof surface, construction workers can perform work safely without causing accidents such as the use of tools or their own falls, without constructing a scaffold around the building. Note that the base metal fitting refers to an angular tubular member attached to the roof surface and can be easily attached at appropriate locations with fixtures or the like. Further, since the support metal fitting uses a mounting bracket for attaching a solar cell panel onto the roof surface, it is possible to attach the column without the need to prepare a new metal fitting.

[0023] In addition, when the column further includes a reinforcing portion connecting between the vertical piece portion and the lateral piece portion, the shape maintenance strength of the column is reinforced, and thus the support strength of the planar member attached thereto is also improved.

Example

[0024] FIG. 1(a) shows an exterior structure with a solar cell to which the fall prevention fence of Example 1 is applied. On the left side of FIG. 1(b) showing the eaves tip, a state where columns 1 and connecting members 2 are attached is shown. FIG. 1(c) shows an enlarged view of part A in FIG. 1(a). The fall prevention fence of this Example 1 is composed of a plurality of columns 1 arranged so as to be orthogonal to the roof gradient, connecting members 2 installed between adjacent columns 1, 1, and a planar member 3 stretched between columns 1, 1 or between connecting members 2, 2. The column 1 is a formed member of a single round pipe material including a lateral piece portion 12 along the roof gradient, a vertical piece portion 11 facing upward, and a curved portion 13 connecting the lower end of the vertical piece portion 11 and the eaves tip of the lateral piece portion 12.

[0025] In Example 1, the column 1 is formed of a single round pipe material with a curved middle part as shown on the left side of Fig. 1(b). The processed middle part is the curved part 13, the unprocessed part on one side is the substantially horizontal cross-piece part 12 in the arranged state, and the unprocessed part on the other side is the substantially vertical longitudinal piece part 11 in the arranged state. A plurality of through holes penetrating in the vertical direction are formed in the cross-piece part 12. And since the diameter, material, etc. of the single round pipe material which is the raw material of this column 1 are not particularly limited, it is an extremely simple and general-purpose member.

[0026] In addition, the column 1 in this Example 1 is further provided with a reinforcing part 1B connecting between the longitudinal piece part 11 and the cross-piece part 12. This reinforcing part 1B is a curved shaped material different from the curved part 13 attached between the longitudinal piece part 11 and the cross-piece part 12, and both ends thereof are cut obliquely and fixed to both the longitudinal piece part 11 and the cross-piece part 12 by screws.

[0027] In addition, the connecting material 2 in this Example 1 has a structure in which both ends 21, 21 of a linear cylindrical material are crushed to form mounting holes 210 as shown in Fig. 1(a), and two rows are attached at predetermined intervals above and below a total of four columns 1. The connecting material 2 is connected linearly between its ends 21, 21 with bolts 2b, 2c and is attached to the column 1. And the single cylindrical material which is the raw material of this connecting material 2 is not particularly limited in its diameter, material, etc. like the round pipe material of the column 1, and since the crushing process of the small-diameter cylindrical material is extremely easy, it is an extremely simple and general-purpose member.

[0028] The planar material 3 in this Example 1 is schematically shown by intersecting dotted lines in Fig. 1(a), and the display of the planar material 3 arranged between the columns 1, 1 arranged in the center is intentionally omitted, but as long as it spans between the columns 1, 1 and between the connecting materials 2, 2, it may be a net-like material such as a net or a lightweight assembled material. And since this planar material 3 has a simple structure and does not require processing or the like by itself, it is easy to obtain the material, and it can be assembled extremely easily because its edge only needs to be attached to the support column 1 and the connecting material 2.

[0029] Next, the roof structure of the exterior structure with a solar cell will be briefly described with reference to the enlarged view of FIG. 1(c). The roof structure 6 for attaching the solar cell 7 is composed of a roofing material 6A attached to a mounting member 5 including a tight frame 5A and a holding member (receptacle) 5B, and a cap material 6B disposed between adjacent roofing materials 6A, 6A. It is constructed by simply arranging it in a pressing manner from above to below, and is a fitting type folded plate roof in which ridge portions and valley portions are alternately formed. The cap material 6B is provided with a fitting portion at the lower end of the ridge covering portion. In the figure, reference numeral 5C is a connecting fitting (bolt and nut) that connects the substantially gate-shaped tight frame 5A and the holding member (receptacle) 5B having a U-shaped cross section. Further, reference numeral 6C in FIG. 1(a) is a large cap material arranged so as to straddle the tops of two ridge portions instead of the cap material 6B arranged at the top of one ridge portion. Symmetric support fittings 4 are attached to the tops of the ridge portions of such a roof structure 6. This support fitting 4 includes an upper half portion 41 having a substantially horizontal support surface portion 411 for receiving the solar cell 7 at the upper end, a fitting groove 412 that is open upward and can accommodate the head of a hexagon bolt inside, a lower half portion 42 having a spring-back locking end 421 at the lower end, and a central connecting portion that is attached in a superposed manner with a mounting bolt 4b and a tightening nut 4c. Since the head of the hexagon bolt can be accommodated in the fitting groove 412 formed at the top of this support fitting 4 as described above, a mounting bolt 4d is attached so that the head is arranged at the lower end from the front side of the drawing, and it is slidably adjustable in the front-rear direction. By passing the mounting bolt 4d through a through hole provided in the horizontal piece portion 12 of the support column 1 and tightening the tightening nut 4e, the support column 1 (horizontal piece portion 12) can be fixed.

[0030] Furthermore, the solar cell 7 of the exterior structure with a solar cell will be briefly described with reference to FIG. 1(a). The solar cell 7 is disposed on a horizontal support member 7B on which a solar cell panel 7A is attached via an L-shaped member 7c on the support fitting 4, and fixing brackets 7d, 7d' for pressing the edge of the solar cell panel 7A are fixed by bolts and nuts 7e, 7f. This solar cell 7 is fixed to the roof structure 6 having the above-described configuration via the support fitting 4, and an L-shaped member 7c is attached to the fitting groove 412 thereof via bolts and nuts 7i, 7j as shown on the right side of Fig. 1(b). Note that the support member 7B is a square prism member having fitting grooves on its upper surface and side surface, and these fitting grooves can accommodate the heads of hexagon bolts in the same manner as the fitting groove 412 in the support fitting 4. The fitting groove on the upper surface is used for attaching (bolts and nuts 7e, 7f) the fixing brackets 7d, 7d' for pressing the solar cell panel 7A disposed on the upper surface side, and the fitting groove on the side surface is used for attaching (bolts and nuts 7g, 7h) the L-shaped member 7c. Therefore, the solar cell 7 can be slid and adjusted in the front-rear, left-right directions with respect to the roof structure 6 (support fitting 4), and the fall prevention fence of this Example 1 is attached using this support fitting 4.

[0031] The fall prevention fence of this Example 1 is itself composed of a small number of members, but the attachment work to the roof structure 6 is also attached using the support fitting 4 for attaching the solar cell 7, so it can be easily applied during the installation construction of the solar cell 7. And the construction worker who performs the attachment work of the solar cell 7 can work safely without causing accidents such as the use of tools and his own fall.

[0032] As described above, the fall prevention fence of Example 1 is composed of simple and general-purpose members for the support column 1, the connecting member 2, and the planar member 3 that form it. In high-place work such as the installation construction of the solar cell 7 on the roof surface 6, the construction worker who performs the work without setting up a scaffold around the building can work safely without causing accidents such as the use of tools and his own fall.

[0033] In addition, the fall prevention fence of this Example 1 includes a reinforcing portion 1B that connects between the vertical piece portion 11 and the horizontal piece portion 12 of the support column 1. Therefore, the shape maintenance strength of the support column 1 is reinforced, and the support strength of the connecting material 2 and the planar material 3 attached thereto is also improved.

[0034] Fig. 2(a) shows a state in which the support column 1 of the above-described configuration is fixed to the base fitting 8 instead of the support fitting 4. Note that the base fitting 8 is a square tube material and does not require processing or the like by itself, so the material is easily available. Fig. 2(b) shows a state in which two rows of support columns 1, 1 on the left and right are attached to a base fitting 8' that is a square tube material longer than the base fitting 8. These are examples applied to a roof surface having a flat portion instead of the above-described fitting type folded plate roof. By fixing the base fittings 8, 8' to the flat portion, a fall prevention fence can be attached to the roof surface.

Example

[0035] The fall prevention fence of Example 2 shown in Fig. 2(c) is formed of a single round pipe material in which the middle part of the support column 1' is bent to form a curved portion 13'. One unprocessed side is the horizontal piece portion 12', and the other side is the vertical piece portion 11'. Note that since the curved portion 13' of the support column 1' in this Example 2 is bent more greatly than in Example 1, when the horizontal piece portion 12' is arranged horizontally in the same manner, the vertical piece portion 11' is in an inclined arrangement state toward the horizontal piece portion 12' side.

[0036] Fig. 3 shows a base structure using the fall prevention fence of Example 2. Since the curved portion 13' of the support column 1' is bent greatly, as described above, the vertical piece portion 11' is arranged in an inclined state toward the horizontal piece portion 12' side. However, a part of the curved portion 13' and a curved surface-shaped planar portion 3' exist so as to protrude from the eaves tip of the horizontally laid stepped base structure 6". The construction procedure for this base structure 6" will be briefly described with reference to Figs. 3 and 4. First, a reference base fitting (square tube material) 8" is fixed in a direction perpendicular to the flow direction with a rope 91 extending in the flow direction from the eaves tip. Next, by stretching ropes 92 from two separate positions away from the reference base fitting 8" to the upper ends of three adjacent columns 1' respectively, a W-shaped safety belt is formed. This safety belt is composed of a total of four ropes 92, which prevent the columns 1' from tipping over and the planar portions 13' from tipping over, and can prevent accidents where construction workers who perform work without constructing a scaffold around the building tip over or climb over the planar portion 13' and fall.

[0037] Note that as the planar material 3', a surface material formed of a lightweight molded material with transparency was fixed so as to be fastened to the inner curved surface side of the column 1'. Therefore, in this fall prevention fence, each column 1' is fixed by driving a fixture (not shown) or the like into the base fittings 8, 8", and a connecting member 2' which is a square tubular member is fixed in a spaced-apart manner in the height direction on the inner surface side between adjacent columns 1', 1', and the aforementioned planar material 3' is fastened to the further inner side thereof. As the planar material 3', a surface material formed of a lightweight molded material with transparency as described above is used, but for example, various net materials of irregular shapes may be used, or transparent or translucent resin molded products provided with appropriate openings may also be used.

[0038] The overall configuration of the fall prevention fence of Example 2 constructed in this way (however, the notation of the planar material 3' is omitted) will be described below with reference to FIGS. 5(a), (b) and FIGS. 6(a), (b). As shown in FIGS. 5(a) and FIGS. 6(a), (b), in this Example 2, since the curved portion 13' of the column 1' is greatly curved, a part of the horizontal piece portion 12' and the curved portion 13' protrudes from the eaves tip of the horizontally laid stepped base structure 6". Moreover, FIG. 5(b) shows the state of the fall prevention fence of Example 2 as seen from the front, and it is clear that the upper end of the planar material 3' whose notation is omitted reaches near the top floor of the base structure 6". Since the planar material 3' whose notation is omitted has transparency, construction workers who perform work on the back side of the planar material 3' whose notation is omitted can perform work with a sense of openness (i.e., without a sense of constriction).

[0039] In this way, the fall prevention fence of Example 2 is also composed of simple and general-purpose members such as the support columns 1', connecting members 2', and planar members 3' that form it. Therefore, construction workers who perform operations without scaffolding around the building can work safely without accidents such as the dropping of tools or their own falls.

[0040] However, in order to install various underlay materials and various roofing materials on this base structure 6", or to construct external members or the like on its surface, the fall prevention fence of this Example 2 was constructed. In high-place operations such as their installation construction, construction workers who perform operations without scaffolding around the building can work safely without accidents such as the dropping of tools or their own falls.

Explanation of Reference Numerals

[0041] 1, 1' Support columns 11, 11' Vertical piece parts 12, 12' Horizontal piece parts 13, 13' Curved parts 1B Reinforcement part 2, 2' Connecting members 3 Planar member 4 Support fitting 5 Mounting member 6 Roof structure (roof surface) 6A Roofing material 6" Base structure 7 Solar cell 7A Solar cell panel 7B Support member 8 Base fitting

Claims

1. A fall prevention fence comprising a plurality of columns arranged perpendicular to the roof slope, a connecting member installed between adjacent columns, and a planar member stretched between the columns or between the connecting members, wherein the column includes a horizontal piece portion along the roof slope, a vertical piece portion facing upward, and a curved portion connecting the lower end of the vertical piece portion and the eaves tip of the horizontal piece portion, and is characterized by the fall prevention fence.

2. The fall prevention fence according to claim 1, wherein the column further includes a reinforcing portion connecting between the vertical piece portion and the horizontal piece portion.

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