JP2000352286A - Safety device for roof work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety device being easily set/disassembled at a job site with a simple structure and having an inexpensively providable structure in a work safety device arranged at roof work such as roofing work. SOLUTION: In this safety device 1 for roofing work, ordinary shape ladders 2 having foot hooking sash bars 3 arranged in a stairs shape between vertical frames 4 are formed in a main part, jack parts 5 for jacking up the ladders 2 are arranged on the lower end of the ladders 2, eaves back side joining points 19 joined to the eaves back side 32 of a building are projected in a forward rising shape in upper end parts of the ladders 2, holding members 6 for erecting safety fence poles 21 are provided in an attachment frame detachably and hookingly fastened to the ladders 2, an erecting attitude of the ladders 2 is fixed and set by two points of the lower ends of the jack parts 5 and the eaves back side joining points 19 brought into pressure contact with the eaves back side, and a safety fence 22 is extended between the safety fence poles 21 of the ladders 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary fence for a worker to fall down on a roof edge when performing roofing work such as tile roofing, roof replacement, roof underlaying work, roof plastering, and roof painting. The present invention relates to a safety device for roof work used as a handrail when walking on a roof edge.

[0002]

2. Description of the Related Art In the above-mentioned roof work, especially in the case of an inclined roof surface, there is always a danger of falling down, so that some safety measures are required. Therefore, as a safety measure, in large-scale construction, a full-scale safety device that sets up a safety fence and a safety rope by assembling a frame from the surrounding ground of the construction building is provided. However, in the case of small- and medium-sized roof construction, such a special safety device is not set, and it is often performed in a state of a non-safety device relying solely on the attention of an operator.

[0003]

The conventional full-scale safety device described above requires time and trouble for setting and dismantling work, which increases the cost, and is not widely used for small and medium-sized roof works. In addition, conventional non-safety device work is dangerous work, so the accident rate is high, and further, there is a problem that the work quality and work efficiency are reduced due to excessive safety attention. An object of the present invention is to provide a roof construction safety device that solves the above-described disadvantages of the related art and that can be set easily at low cost.

[0004]

The safety device for roof construction according to the present invention which solves the above technical problem is composed of a conventional ladder having rigid stepping stairs provided between rigid vertical frames. A main part, a jack part is detachably provided at the lower end of the ladder, and at the upper end part of the ladder, an eaves back junction point to be joined to the back of the building eaves is protruded in a front ascending form, and a safety fence pole is provided. The eaves back joining point of the erecting ladder near the eaves is pressed against the eaves back of the building by the jack ladder ascending operation of the ladders. The first invention of a structure in which the standing posture of the ladder is fixedly set, and a safety fence / safety rope is set between the safety fence poles of the standing and fixed ladder ''.

[0005] The main part is a ladder of a usual form in which rigid footing bars are provided in a stepped manner between rigid vertical frames, the upper end of the ladder is a safety fence connecting part, and a building roof is formed. A ladder support arm that is nailed and locked to the wooden part of the ladder is detachably provided on the upper half portion of the ladder, and the ladder support arm of the ladder leaning up on the building is set on the building side by locking and set from the building eaves. A structure in which a safety fence and a safety rope are provided between the safety fence connecting portions of the ladder that protrudes.

In other words, the safety device for roof work of the present invention uses a normal form ladder, which is an essential tool for roof work, and lays out safety fences and safety ropes along the eaves edge for roof work. Characterized by a structure that prevents falling due to roof work and can be used as a safety handrail when walking on the eaves rim, the jack means and holding member of the first invention being detachably attached to a ladder. Is adopted in a form of an attachment configuration including a U-shaped hook or an inverted U-shaped hook which is hooked on two foothold bars adjacent to the upper and lower sides of the ladder.

[0007]

According to the first aspect of the present invention, the eaves back joint point protruding forward from the holding member attached to the upper end portion of the ladder is pressure-joined to the eaves back by jacking up the jack at the lower end of the ladder. The ladder is tightly held at two points by the lower end of the jack part and the eaves back joint point, and is fixedly set to a vertical posture or a nearly vertical standing posture. Therefore, the ladder can sufficiently withstand the lifting load for roof work, and the safety fences and safety ropes set on the safety fence poles protruding above the ladder in the fixed set position are used to prevent the workers from falling down and the eaves. It can function well as a handrail for walking.

On the other hand, according to the second aspect of the present invention, since the tip of the ladder support arm mounted on the upper end of the ladder is fixed to the roof side, the standing position of the ladder leaning on the building easily falls down due to external force. There is no fixed form. Therefore, a safety fence or the like set between the upper end portions of the fixed ladder can function well as a fall prevention fence for workers and a safety handrail for walking.

The first and second inventions each have a structure in which a ladder of a normal form is used as a main part, and the above-mentioned jack portion, holding member, and ladder support arm are combined and mounted on the ladder. The structure is simple and easy to carry in / out to the site, and setting / dismantling at the site can be simplified. And
According to the first aspect of the present invention, the ladder can be set upright with the ladder in a vertical or near-vertical posture, so that it can be set even in a place where the space around the building is narrow.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the safety device for roof work according to the first invention will be described with reference to FIGS.
That is, the safety device 1 is suitable for use in a situation where the space around the building is narrow and the ladder must be placed in a substantially vertical posture, and the rigid footrest is provided between the rigid vertical frames 4. A main part is a ladder 2 of a normal form in which a crossbar 3 is provided in a stepwise manner. A jack part 5 for jacking up the ladder 2 by manually operating the lower end of the ladder 2 is detachably provided. And a holding member 6 detachably attached to the upper end portion of the holding member.

More specifically, the jack portion 5 (see FIG. 3) is provided with a jack mechanism in a longitudinal direction at a central portion of an attachment frame 8 which is joined and fixed to two adjacent footrest bars 3 at the lower end of the ladder 2. The attachment frame 8 has two left and right and a pair of upper and lower U-shaped hooks 15.
Thereby, it can be detachably hooked to the upper and lower two foot bars 3. And the jack mechanism is the attachment frame 8
A jack tube 9 fixed in the vertical direction at the center of the male screw body and a "jack screw shaft 10 of a male screw body which stops the lower end of the jack tube 9 with a jack handle 13 inserted and screwed into the jack tube 9". A landing portion 12 having a spike pin hole 14 is provided at a lower end of the jack shaft 10.

When the upper half portion of the jack shaft 10 is inserted into the jack tube 9 of the attachment frame 8 hooked and set on the ladder 2 and the landing portion 12 lands on the ground G, the standing load of the ladder 2 is reduced. 5, and the ladder 2 can be jacked up by turning the jack handle 13. In addition, the attachment frame 8 is provided with a “reverse U-shaped hook 1 with a biasing spring 18” for stabilizing the hooking position of the U-shaped hook 15 on the footrest bar 3 and preventing the attachment frame 8 from coming off.
6 "is attached.

On the other hand, the holding member 6 (see FIG. 4) has an inverted U-shaped hook 16 and is attached to the upper and lower two foot bars 3 to be hooked and fixed to the upper end of the frame 8. The attachment frame 8 is provided with a safety fence pole 21 extending vertically above the ladder 2 in a vertical direction. Have been. The attachment frame 8 also has a footrest 4
There is provided a U-shaped hook 15 with an urging spring for "prevention of rattling and detachment" in a state of being hooked by an inverted U-shaped hook 16 to the hook.

The safety device 1 having the above configuration is used as follows. That is, (see FIGS. 1 and 2), the jack part 5 and the holding member 6 are mounted and set on the ladder 2 which has been fallen to the ground, and the ladder 2 is raised vertically to be in a vertical position along the outer wall of the building 30 requiring roof construction. , Eaves back junction point 19 protruding forward
The ladder 2 is jacked up by manually operating the jack handle 13 of the jack portion 5 so that the ladder 2 is jacked up. The standing posture of the ladder 2 is fixedly set by two points of the eaves back joining point 19 which is pressure-welded to the landing part 12 and the eaves back 32. And this standing and fixed ladder 2
Are arranged along the eaves 31 of the building 30 at appropriate intervals.

Thus, the safety fence 22 (or safety rope) is passed between the safety fence connecting portions 23 (the known pipe joint in this embodiment) of the safety fence pole 21 projecting upward from the eaves 31 of the building 30. The safety device 1 for building construction is set and used.

The above-described embodiment has the above-described operation.
Since the work ladder 2 can be used as a support member of the safety device and the ladder can be erected in a vertical position,
Even if the area around the building is extremely narrow, safety fences can be installed, and setting up and dismantling can be extremely simple. Further, in the above-described embodiment, since the attaching / detaching means of the holding member 6 / jack portion 5 to / from the ladder 2 is composed of the U-shaped hook 15 and the inverted U-shaped hook 16 which are hooked to the footrest bar 3, the attaching / detaching to / from the ladder 2 is performed. However, there is a merit that the setting and dismantling of the safety device 1 are particularly easy with one touch.

Next, an embodiment of the safety device according to the second invention will be described with reference to FIGS. That is, the safety device 20 of this embodiment is a ladder 2 of a normal form leaning against a building 30.
The upper part of the ladder 2 is connected and locked to the roof 33 and fixed upright, and the upper part of the ladder 2 in the upright fixed position is formed as a support column of the safety fence 22 by protruding from the eaves edge 34. I have.

More specifically, a "bar-shaped ladder support arm 25 which is inclined forward and downward" is detachably attached to the upper end of a "ladder 2 of a normal form comprising a vertical frame 4 and a foot bar 3" similar to the above embodiment. The fixing plate 26 at the tip of the ladder support arm 25 is fixed to the wooden portion (roof beam material, eave beam material, gable portion, etc.) of the roof 33 by nailing, so that the standing position of the ladder 2 is fixed. Then, even if the upper end portion of the ladder 2 in the standing and fixed posture receives “an external force that tends to defeat the ladder 2 (an external force that can be normally predicted during roofing work)”, the standing and fixed posture can be maintained. It has become.

That is, the ladder support arm 25 (see FIG. 6) is fitted with each other and can be freely put in and out of the cover tube 27 and the inner tube 28.
The tube arm can be set and fixed to the required length L by
At the base end of the covering tube 27, there is provided a "ladder connecting portion 40 comprising a pair of locking claws 41 for holding and holding the vertical frame 4 of the ladder 2". The ladder 2 protrudes forward.

A fixing plate 26 having a nail hole 42 is hingedly connected to the tip of the inner tube 28. This fixing plate 26 is referred to as a wooden roof which appears on the roof 33 during roofing work, for example. And nails to beams. And
At the upper end portion of the ladder 2 to which the ladder support arm 25 is attached, two safety fence clamps 45 integrally connecting the same ladder connecting portion 40 and tube fixing portion 43 as shown in FIG. It is provided detachably.

Then, the ladder 2 is placed on the building 30 to be roofed.
Are lined up at required intervals and fixed, and the tube is laterally clamped to the safety fence clamp 45 at the upper end of the ladder 2 protruding from the eaves edge 34 of the building 30 to set the safety fence 22 to prevent the fall of the roof worker. Used as a safety fence or as a handrail for walking along the eaves.

The safety device 20 for building construction according to the above embodiment has the above-mentioned function, and since the ladder 2 is used as a main part, the structure is simplified, and it is extremely easy to assemble and disassemble on site, and the structure is simplified and inexpensive. It can be very useful especially for small and medium-sized roof construction.

The roof construction safety device of the present invention is not limited to the above-described embodiment, but uses the ladder auxiliary leg attachment of Japanese Patent No. 2819254 in order to further stabilize the ladder 2 in the upright fixed posture. Or a double jack mechanism in which the jack portion 5 of the first invention is provided in each of the vertical frames 4 or a known general-purpose hydraulic jack, and furthermore, the attachment frame 8 of the first invention is bolted to and detached from the ladder 2. There is a change such as the structure. As shown in FIG. 8, the second bright ladder support arm 25 is provided with a fixing plate 26 having a tip portion bent at 90 ° to lock the fixing plate 26 to a gable part on the side of the building roof. Sometimes.

[0024]

As described above, the safety device for roof construction according to the present invention comprises, as a main part, a ladder having a normal form as an essential tool for roof construction, and combining the ladder with one or two separate members. Because it can be set by connecting, it can be easily carried in and out of the construction site, and can be set up and dismantled on site efficiently in a short time. The structure is simple and inexpensive, and can be effectively used for small and medium-sized roof construction.

Further, since the work safety of the roof work can be ensured, the work efficiency and work quality of the work can be further improved. There are the above effects.

[Brief description of the drawings]

FIG. 1 is a front view of a use state of a roof construction safety device according to a first embodiment of the present invention.

FIG. 2 is a side view of the use state of the roof construction safety device according to the first embodiment of the present invention;

3A and 3B show a jack portion of the embodiment shown in FIG. 1, wherein FIG. 3A is a perspective view of a component thereof, and FIG.

4A and 4B show a holding member of the embodiment in FIG. 1, wherein FIG. 4A is a side view thereof, and FIG.

FIG. 5 is a perspective view of the use state of the roof construction safety device according to the second embodiment of the present invention;

6A and 6B show the ladder support arm of the embodiment of FIG. 5, wherein FIG. 6A is a front view thereof, and FIG.

7 is a partially enlarged view of the embodiment in FIG. 5, (A) is a partial side view in a use state, and (B) is a perspective view of a safety fence connecting portion.

FIG. 8 is a perspective view of another embodiment of the ladder support arm of the construction safety device according to the second invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roof construction safety device of 1st invention 2 Ladder 3 Footrest 4 Vertical frame 5 Jack part 6 Holding member 8 Attachment frame 9 Jack pipe 10 Jack shaft 12 Landing part 13 Manual handle 15 U-shaped hook 16 Reverse U-shaped hook 17 Holding arm 19 Back junction point of eave 20 Safety device for roof construction of the second invention 21 Safety fence pole 22 Safety fence 23 Safety fence connecting part 25 Ladder support arm 26 Fixing plate 27 Cover tube 28 Inner tube 30 Building 31 Building 32 Back of house 33 Roof 40 Ladder connection part 45 Safety fence clamp

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E044 BA01 BA11 BB03 BC04 BC11 BC22 BC23 CA01 CB03 EE13

Claims (4)

[Claims] 1. A ladder of a normal form in which a rigid foot bar is provided in a stepped manner between rigid vertical frames is formed as a main part, and a jack part is detachably provided at a lower end of the ladder. At the upper end of the ladder, the eaves back junction point to be connected to the back of the building eaves is protruded in the form of ascending forward, and the structure is equipped with a detachable holding member with a safety fence pole installed. The eaves back junction point of the ladder is pressed against the back of the eaves of the building by a lifting operation of the ladder by the jack portion to fix and set the ladder in the standing position, and the safety fence of the standing and fixed ladder is set. A safety device for roof construction characterized by a structure in which safety fences and safety ropes are set between poles. 2. The roof construction safety device according to claim 1, wherein the holding member comprises an attachment frame provided with an inverted U-shaped hook which is hung on a pair of upper and lower footrest bars. 3. The jack frame according to claim 1, wherein the jack portion comprises an attachment frame provided with U-shaped hooks to be hooked on a pair of upper and lower footrest bars, and the attachment frame is provided with a jack mechanism in a vertical direction. Safety device for roof construction. 4. A ladder of a normal form in which a rigid footing bar is provided in a step-like manner between rigid vertical frames constitutes a main portion, and an upper end portion of the ladder constitutes a safety fence connecting portion and a building. A ladder support arm for nailing and locking to a wooden part of a roof is detachably provided on an upper half portion of the ladder, and the ladder support arm of the ladder leaning upright on a building is set on the building side to lock and set. A safety device for roof construction, wherein a safety fence and a safety rope are provided between the safety fence connecting portions of the ladder protruding from the roof.