JP6888856B1 - Fall prevention device and fall prevention method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the safety of an operator by a simple operation even at an assembly site of a reinforcing bar having no vertical pillar. SOLUTION: In a state where an upper flat plate portion 10 having a first tightening port 11 and an upper flat plate portion are opposed to each other, a second tightening port 21 is provided at substantially the same place as a first tightening port in the upper flat plate portion. With the lower flat plate portion 20 and the upper flat plate portion and the lower flat plate portion facing each other, the lower flat plate portion 20 is inserted into the first tightening port and the second tightening port, and between the upper flat plate portion and the lower flat plate portion. It is provided with a tightening portion 30 whose spacing can be adjusted, a substantially cylindrical single tube insertion portion 40 having a bottom surface portion 43 and an open top surface, and a female screw portion near one end of the lower flat plate portion. 22 is provided, and the lower flat plate portion and the upper flat plate portion are opposed to each other, and the male screw insertion hole 12 is provided in the upper flat plate portion at substantially the same location as the female screw portion. It was decided to use the fall prevention device 100 characterized in that a part of the male screw portion 41 with the male screw portion facing up is fixed and the tip of the male screw portion protrudes downward from the bottom surface portion. [Selection diagram] Fig. 1

Description

The present invention relates to a fall prevention device for preventing a fall when walking on a reinforcing bar at a construction site, and a fall prevention method.

When constructing a building, an assembly bar consisting of multiple reinforcing bars is constructed at the place where concrete is placed, and then a formwork is installed and concrete is placed. When constructing the assembly muscle or installing the formwork, there is a risk of accidentally falling from the upper part of the assembly muscle to the bottom and causing injury.

Patent Document 1 describes a safety device capable of fixing a main support rod to a fixed portion narrowly attached to a vertical column and locking a rope to the main support rod.

Patent Document 1: Japanese Patent Application Laid-Open No. 51-144029

However, the one described in Patent Document 1 has a problem that it cannot be used in a work site without a vertical pillar because it is essential to narrowly attach a fixed portion to the vertical pillar.

An object of the present invention is to solve the above-mentioned problems and to secure the safety of an operator by a simple operation even at an assembly site of a reinforcing bar having no vertical pillar.

In order to solve the above problems, the present invention is a fall prevention device for preventing falls at a construction site.
A long plate shape, and a flat portion on having a first fastening hole,
A long plate-shaped lower flat plate part with a second tightening port,
With the upper flat plate portion and the lower flat plate portion facing each other, bolts inserted into the first tightening port and the second tightening port are placed between the upper flat plate portion and the lower flat plate portion. Tightening part that holds the interval adjustable and
It is provided with a substantially cylindrical single tube insertion part having a bottom surface and an open top surface.
A male screw portion protrudes from the bottom surface portion of the single tube insertion portion.
A male screw insertion hole through which the male screw portion penetrates is provided in the vicinity of one end of the upper flat plate portion.
The present invention provides a fall prevention device characterized in that the male threaded portion has a female threaded portion to which the male threaded portion can be screwed in the vicinity of one end of the lower flat plate portion.

With this configuration, it is possible to ensure the safety of the operator with a simple operation even at the assembly site of the reinforcing bar without a vertical pillar.

It is a fall prevention device, and both the first tightening port and the second tightening port are elongated holes.
The tightening portion may be configured to be slidable along the first tightening port and the second tightening port, which are the elongated holes.

With this configuration, the tightening position by the tightening portion can be adjusted with a simple configuration.

In the fall prevention device, the male screw portion can adjust the distance between the upper flat plate portion and the lower flat plate portion by penetrating the male screw insertion hole and screwing into the female screw portion.
The single tube insertion portion, the upper flat plate portion, and the lower flat plate portion may be separated by releasing the screwing of the male screw portion with respect to the female screw portion.

With this configuration, the distance between the single tube insertion part and the upper plate part and the lower plate part can be adjusted with a simple structure, and the male screw part and the single tube insertion part are separated from the upper plate part and the lower plate part. Then, the concrete can be placed while including the upper flat plate portion and the lower flat plate portion.

Further, in order to solve the above problems, the present invention has a long plate-like upper flat plate portion having a first tightening port, and a flat plate portion.
A long plate-shaped lower flat plate part with a second tightening port,
With the upper flat plate portion and the lower flat plate portion facing each other, bolts inserted into the first tightening port and the second tightening port are placed between the upper flat plate portion and the lower flat plate portion. Tightening part that holds the interval adjustable and
It is provided with a substantially cylindrical single tube insertion part having a bottom surface and an open top surface.
A male screw portion protrudes from the bottom surface portion of the single tube insertion portion.
A male screw insertion hole through which the male screw portion penetrates is provided in the vicinity of one end of the upper flat plate portion.
A fall prevention device characterized in that the male screw portion has a screwable female screw portion in the vicinity of one end of the lower flat plate portion is prepared.
Positioned so that the reinforcing bar is sandwiched between the upper flat plate portion and the lower flat plate portion.
The bolt is inserted into the first tightening port and the second tightening port to adjust and fix the distance between the upper flat plate portion and the lower flat plate portion, and the male screw portion is screwed into the female screw portion. Then, the reinforcing bar is tightened between the upper flat plate portion and the lower flat plate portion.
Insert a single tube into the single tube insertion part,
It provides a fall prevention method characterized by locking a lifeline, a main line, or a single tube in the horizontal direction to the single tube.

With this configuration, it is possible to ensure the safety of the operator with a simple operation even at the assembly site of the reinforcing bar without a vertical pillar.

According to the fall prevention device and the fall prevention method of the present invention, the safety of the operator can be ensured by a simple operation even at the assembly site of the reinforcing bar without a vertical pillar.

It is a figure explaining the fall prevention device in Example 1 of this invention. It is a figure explaining (a) the upper flat plate part, (b) the tightening part washer, and (c) the bottom surface part of the single tube insertion part in Example 1 of this invention. It is a figure explaining the tightening part in Example 1 of this invention. It is a figure explaining the example in which the fall prevention device in Example 1 of this invention was attached to a reinforcing bar.

Example 1 of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a diagram illustrating a fall prevention device according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating (a) an upper flat plate portion, (b) a tightening portion washer, and (c) a bottom surface portion of a single tube insertion portion according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating a tightening portion according to the first embodiment of the present invention. FIG. 4 is a diagram illustrating an example in which the fall prevention device according to the first embodiment of the present invention is attached to a reinforcing bar.

(Fall prevention device)
The fall prevention device 100 in the first embodiment is substantially the same as the first tightening port 11 in the upper flat plate portion 10 in a state where the upper flat plate portion 10 having the first tightening port 11 and the upper flat plate portion 10 face each other. A lower flat plate portion 20 having a second tightening port 21 is provided at the place. Further, with the upper flat plate portion 10 and the lower flat plate portion 20 facing each other, the upper flat plate portion 10 and the lower flat plate portion 20 are inserted into the first tightening port 11 and the second tightening port 21, and between the upper flat plate portion 10 and the lower flat plate portion 20. It is provided with a tightening portion 30 whose interval can be adjusted, and a substantially cylindrical single tube insertion portion 40 having a bottom surface portion 43 with the bottom surface closed and an open top surface.

Here, in the first embodiment, both the first tightening port 11 and the second tightening port 21 are elongated holes, and the tightening portion 30 is a slotted hole, the first tightening port 11 and the second tightening port 21. It is slidable along the mouth 21. As a result, the position where the tightening portion 30 is inserted into the upper flat plate portion 10 and the lower flat plate portion 20 to adjust the distance between the upper flat plate portion 10 and the lower flat plate portion 20 can be adjusted so as not to be disturbed by the reinforcing bars at the construction site. It is said.

Both the upper flat plate portion 10 and the lower flat plate portion 20 are made of a long flat plate-shaped steel material on one side, and have a size of about 400 mm × 60 mm. Both the first tightening port 11 and the second tightening port 21 are formed so as to have a length of about 210 mm from the vicinity of the other end of the upper flat plate portion 10 and the lower flat plate portion 20, and the first tightening port 11 The width of the second tightening port 21 is 13.5 mm, and the width of the second tightening port 21 is 21.5 mm. Further, both ends of the first tightening port 11 have an arc shape, but both ends of the second tightening port 21 have a convex shape. The convex shape of both ends of the second tightening port 21 has a shape in which the fitting long nut 32 of the tightening portion 30, which will be described later, engages. The arcuate shape at both ends of the first tightening port 11 is such that the male threaded portion of the bolt 31 of the tightening portion 30 engages. Therefore, the total length to both ends of the second tightening port 21 is slightly longer than the total length to both ends of the first tightening port 11. Further, the width of the second tightening port 21 is wider than the width of the first tightening port 11 on which the male screw portion of the bolt 31 slides because the W1 / 2 size hexagonal fitting long nut 32 slides. It has become. As shown in FIG. 3, the fitting long nut 32 is a long nut that is long so as to penetrate the second tightening port 21 from the upper surface to the lower surface of the lower flat plate portion 20.

Further, the lower flat plate portion 20 has a female screw portion 22 in the vicinity of one end (30.25 mm from one end in the first embodiment), and the lower flat plate portion 20 and the upper flat plate portion 10 are opposed to each other. In this state, a male screw insertion hole 12 having a diameter of 13.5 mm is provided in the vicinity of one end of the upper flat plate portion 10, that is, in a state where the upper flat plate portion 10 and the lower flat plate portion 20 face each other and at substantially the same location as the female screw portion 22. doing. This is such that the male screw portion 41 provided on the bottom surface portion 43 of the single tube insertion portion 40, which will be described later, penetrates the male screw insertion hole 12 and can be screwed into the female screw portion 22.

The female screw portion 22 in the first embodiment is formed by welding a nut to the bottom surface of the lower plate portion 20 to form a welded portion W. However, the present invention is not limited to this, and changes can be made as appropriate. For example, a female thread may be cut on the lower plate portion 20, or a nut may be welded to the upper surface of the lower plate portion 20 to form a welded portion W.

In Example 1, both the upper flat plate portion 10 and the lower flat plate portion 20 have a long flat plate shape on one side, but the shape is not necessarily limited to this and can be changed as appropriate. For example, either one or both of the upper flat plate portion 10 and the lower flat plate portion 20 may be square or circular, and may have any shape.

Further, in the first embodiment, both ends of the first tightening port 11 have an arc shape, and both ends of the second tightening port 21 have a convex shape. It is not necessarily limited to this and can be changed as appropriate. For example, both ends of the first tightening port 11 and both ends of the second tightening port 21 may both have an arc shape, a convex shape, or any shape.

The tightening portion 30 will be described with reference to FIGS. 2 (b) and 3. The tightening portion 30 in the first embodiment is composed of a bolt 31, a fitting long nut 32, and two washers 34. A hexagonal hole 34A into which the fitting long nut 32 can be fitted penetrates through the center of the washer 34. The fitting long nut 32 is fitted into the second tightening port 21 of the lower plate portion 20, and is fitted into the hole 34A of the washer 34 on the upper surface side of the lower plate portion 20 in a non-rotatable state and welded to the welded portion. Forming W. Further, the fitting long nut 32 is also fitted and welded in the hole 34A of the washer 34 on the lower surface side of the lower plate portion 20 to form the welded portion W. In this state, the upper flat plate portion 10 faces the lower flat plate portion 20, the bolt 31 is inserted into the first tightening port 11 of the upper flat plate portion 10, and then screwed into the fitting long nut 32. As a result, the tightening portion 30 can slide along the first tightening port 11 and the second tightening port 21, and by tightening the bolt 31, the length in the direction orthogonal to the sliding direction. That is, the distance between the upper flat plate portion 10 and the lower flat plate portion 20 can be adjusted. As will be described later, the operator slides the tightening portion 30 without inserting the bolt 31 to search for a gap between the reinforcing bars, and then inserts and screwes the bolt 31 to sandwich the reinforcing bar and tighten it to cause a fall. The prevention device 100 can be fixed.

Next, the single tube insertion portion 40 will be described with reference to FIGS. 1 and 2 (c). The single tube insertion portion 40 in the first embodiment has a substantially cylindrical shape in which the bottom surface is closed by welding the hexagonal bottom surface portion 43 and the top surface is open, and has a length of about 160 mm. ing. Further, the bottom surface portion 43 of the single pipe insertion portion 40 is welded in the middle of the threaded portion which is a part of the male screw portion 41 inserted from the top surface with the head facing up to form the welded portion W. It is fixed. Further, the tip of the threaded portion of the male threaded portion 41 protrudes downward from the bottom surface portion 43 of the single tube insertion portion 40. As a result, the single tube insertion portion 40 can rotate together with the male screw portion 41 to rotate the tip of the threaded portion of the male screw portion 41.

The tip of the screw portion protruding downward from the bottom surface portion 43 of the single tube insertion portion 40 can penetrate the male screw insertion hole 12 of the upper plate portion 10 and be screwed into the female screw portion 22 of the lower plate portion 20. As a result, the distance between the upper flat plate portion 10 and the lower flat plate portion 20 can be changed by the operator turning the single tube insertion portion 40, and the reinforcing bar F is sandwiched between the upper flat plate portion 10 and the lower flat plate portion 20. Can be tightened with. Further, the single tube insertion portion 40, the upper flat plate portion 10 and the lower flat plate portion 20 can be separated by releasing the screwing of the male screw portion 41 with respect to the female screw portion 22.

In Example 1, the bottom surface portion 43 is hexagonal, but the present invention is not necessarily limited to this and can be changed as appropriate. For example, it may be a circle or a polygon other than a hexagon. The bottom surface of the single tube insertion portion 40 may be closed by the bottom surface portion 43.

Further, in the first embodiment, the bottom surface portion 43 is welded to the bottom surface of the single pipe insertion portion 40, but the present invention is not necessarily limited to this and can be appropriately changed. For example, the bottom surface portion 43 may be screwed to the bottom surface of the single tube insertion portion 40, or may be adhered with an adhesive.

In this way, the upper plate portion 10 and the lower plate portion 20 can be tightened at two places by the operator turning the single pipe insertion portion 40 and the bolt 31 of the tightening portion 30. It can be firmly fixed to the reinforcing bar F sandwiched between the two. Further, since the tightening portion 30 can slide along the upper flat plate portion 10 and the lower flat plate portion 20, it can be adjusted to the gap of the reinforcing bar F and can be used in various sites. Further, the single tube insertion portion 40 can be separated from the upper flat plate portion 10 and the lower flat plate portion 20 by releasing the screwing of the male screw portion 41 with respect to the female screw portion 22, and thus the single pipe insertion portion 40 can be separated. The rear upper flat plate portion 10 and the lower flat plate portion 20 can be solidified with concrete together with the reinforcing bar F.

A single tube 50 having an arbitrary length can be inserted into the single tube insertion portion 40 from the top surface thereof. Then, a lifeline (not shown) can be engaged with the hook portion 51 provided on the single tube 50 to prevent the operator from falling. Further, a main rope (not shown) can be locked between the hook portions 51 of the two single pipes 50, and the life rope can be engaged with the main rope to prevent the operator from falling. Alternatively, another horizontal single tube (not shown) can be locked between the two single tubes 50, and the lifeline can be engaged with the single tube to prevent the operator from falling.

In Example 1, the number of tightening portions 30 is one, but the number is not necessarily limited to this and can be changed as appropriate. For example, the tightening portions 30 may be a plurality of places, and the upper flat plate portion 10 and the lower flat plate portion 20 may be tightened at a plurality of places.

(Fall prevention method)
First, in a state where the upper flat plate portion 10 having the first tightening port 11 and the upper flat plate portion 10 face each other, the second tightening is performed at substantially the same place as the first tightening port 11 in the upper flat plate portion 10. With the lower flat plate portion 20 having the attachment port 21 and the upper flat plate portion 10 and the lower flat plate portion 20 facing each other, they are inserted into the first tightening port 11 and the second tightening port 21. A tightening portion 30 capable of adjusting the distance between the upper flat plate portion 10 and the lower flat plate portion 20, a substantially cylindrical single tube insertion portion 40 having a bottom surface portion 43 and an open top surface, and the like. The lower plate portion 20 is provided with a female screw portion 22 in the vicinity of one end of the lower flat plate portion 20, and the lower flat plate portion 20 and the upper flat plate portion 10 are opposed to each other at substantially the same location as the female screw portion 22. The upper flat plate portion 10 has a male screw insertion hole 12, and a part of the male screw portion 41 with the head facing up is fixed to the bottom surface portion 43 of the single tube insertion portion 40, and the male screw portion 41 Prepare a fall prevention device 100 whose tip protrudes downward from the bottom surface portion 43.

Next, a plurality of reinforcing bars installed in the horizontal direction of the construction site are sandwiched between the upper flat plate portion 10 and the lower flat plate portion 20, and the tightening portion 30 is provided along the first tightening port 11 and the second tightening port 21. And slide to find the gap of the reinforcing bar F, and the operator turns the bolt 31 to adjust the length in the direction orthogonal to the sliding direction, that is, the distance between the upper plate portion 10 and the lower plate portion 20. Fix it so that it is tightened.

Then, the male screw portion 41 is passed through the male screw insertion hole 12 of the upper flat plate portion 10, and the single pipe insertion portion 40 is screwed into the female screw portion 22 of the lower flat plate portion 20 by being turned by the operator to form the upper flat plate portion 10. Reinforcing bar F is tightened with the lower flat plate portion 20. As a result, the upper flat plate portion 10 and the lower flat plate portion 20 can be tightened at two places, and the fall prevention device 100 can be firmly fixed to the reinforcing bar F sandwiched between them (see FIG. 4).

Next, the single tube 50 (see FIG. 1) having the hook portion 51 is inserted from the top surface of the single tube insertion portion 40. Then, a lifeline (not shown) can be locked to the hook portion 51 provided on the single tube 50 to prevent the operator from falling. Further, a main rope (not shown) can be locked between the hook portions 51 of the two single pipes 50, and the life rope can be engaged with the main rope to prevent the operator from falling. Alternatively, another horizontal single tube (not shown) can be locked between the two single tubes 50, and the lifeline can be engaged with the single tube to prevent the operator from falling.

As described above, in the first embodiment, the fall prevention device for preventing falls at the construction site.
The upper flat plate part having the first tightening port and
With the upper flat plate portion facing each other, the lower flat plate portion having the second tightening port at substantially the same position as the first tightening port in the upper flat plate portion, and the lower flat plate portion.
With the upper flat plate portion and the lower flat plate portion facing each other, the upper flat plate portion and the lower flat plate portion are inserted into the first tightening port and the second tightening port to reduce the distance between the upper flat plate portion and the lower flat plate portion. Adjustable tightening part and
It is provided with a substantially cylindrical single tube insertion part having a bottom surface and an open top surface.
A male screw insertion hole is provided in the upper flat plate portion at substantially the same location as the female screw portion while having a female screw portion near one end of the lower flat plate portion and with the lower flat plate portion and the upper flat plate portion facing each other. Have,
A part of the male screw portion with the head facing up is fixed to the bottom surface portion of the single tube insertion portion, and the tip of the male screw portion protrudes downward from the bottom surface portion. With the prevention device, the safety of the operator can be ensured by a simple operation even at the assembly site of the reinforcing bar without a vertical pillar.

Further, in the fall prevention device, the first tightening port and the second tightening port are both elongated holes, and the tightening portion is the elongated hole, the first tightening port and the second tightening port. Due to the structure that can slide along the tightening port, the tightening position by the tightening portion can be adjusted with a simple structure.

Further, in the first embodiment, the upper flat plate portion having the first tightening port and the upper flat plate portion face each other, and the second upper flat plate portion is located at substantially the same place as the first tightening port in the upper flat plate portion. With the lower flat plate portion having the tightening port, the upper flat plate portion and the lower flat plate portion facing each other, the upper flat plate portion is inserted into the first tightening port and the second tightening port. One of the lower plate portions is provided with a tightening portion capable of adjusting the distance between the lower plate portion and the lower plate portion, and a substantially cylindrical single tube insertion portion having a bottom surface portion and an open top surface. The single tube has a female screw portion near the end and has a male screw insertion hole in the upper flat plate portion at substantially the same location as the female screw portion in a state where the lower flat plate portion and the upper flat plate portion face each other. A part of the male screw portion with the head facing up is fixed to the bottom surface portion of the insertion portion, and a fall prevention device is prepared in which the tip of the male screw portion protrudes downward from the bottom surface portion.
Positioned so that the reinforcing bar is sandwiched between the upper flat plate portion and the lower flat plate portion.
The tightening portion is inserted into the first tightening port and the second tightening port to adjust and fix the distance between the upper flat plate portion and the lower flat plate portion, and the male screw portion is attached to the female screw portion. By screwing, the reinforcing bar is tightened between the upper flat plate portion and the lower flat plate portion.
Insert a single tube into the single tube insertion part,
By the fall prevention method characterized by locking the lifeline, the main line, or the horizontal single tube to the single tube, the safety of the operator can be ensured by a simple operation even at the assembly site of the reinforcing bar without a vertical column. Can be done.

Example 2 of the present invention is different from Example 1 in that the first tightening port and the second tightening port are holes instead of elongated holes.

The first tightening port and the second tightening port in the second embodiment are holes provided in advance at positions where tightening by the tightening portion is possible. Therefore, the tightening portion does not slide along the first tightening port and the second tightening port, but is inserted into the first tightening port and the second tightening port and tightened to the upper plate portion 10 and below. The distance between the flat plate portion 20 and the flat plate portion 20 is adjusted. Thereby, the distance between the upper flat plate portion 10 and the lower flat plate portion 20 can be adjusted at a lower cost.

The first tightening port and the second tightening port do not have to be one, respectively, and a plurality of the first tightening port and the second tightening port are provided, and the first tightening port at the optimum position is provided. The same tightening portion 30 as in the first embodiment may be inserted into the second tightening port and tightened to adjust the distance between the upper flat plate portion 10 and the lower flat plate portion 20.

Further, when a plurality of first tightening ports and second tightening ports are provided, the number of tightening portions 30 does not have to be one, and a plurality of tightening portions may be provided with a plurality of first tightening ports and second tightening portions. It may be configured so as to adjust the distance between the upper flat plate portion 10 and the lower flat plate portion 20 by inserting and tightening the attachment port.

In the second embodiment, the tightening portion is the same as that in the first embodiment, but the tightening portion is not necessarily limited to this and can be changed as appropriate. For example, it may be a tightening portion using one bolt and one nut.

As described above, also in the second embodiment, the fall prevention device for preventing the fall at the construction site.
The upper flat plate part having the first tightening port and
With the upper flat plate portion facing each other, the lower flat plate portion having the second tightening port at substantially the same position as the first tightening port in the upper flat plate portion, and the lower flat plate portion.
With the upper flat plate portion and the lower flat plate portion facing each other, the upper flat plate portion and the lower flat plate portion are inserted into the first tightening port and the second tightening port to reduce the distance between the upper flat plate portion and the lower flat plate portion. Adjustable tightening part and
It is provided with a substantially cylindrical single tube insertion part having a bottom surface and an open top surface.
A male screw insertion hole is provided in the upper flat plate portion at substantially the same location as the female screw portion while having a female screw portion near one end of the lower flat plate portion and with the lower flat plate portion and the upper flat plate portion facing each other. Have,
A part of the male screw portion with the head facing up is fixed to the bottom surface portion of the single tube insertion portion, and the tip of the male screw portion protrudes downward from the bottom surface portion. With the prevention device, the safety of the operator can be ensured by a simple operation even at the assembly site of the reinforcing bar without a vertical pillar.

Further, also in the second embodiment, in a state where the upper flat plate portion having the first tightening port and the upper flat plate portion face each other, the second tightening port in the upper flat plate portion is substantially the same as the first tightening port. With the lower flat plate portion having the tightening port, the upper flat plate portion and the lower flat plate portion facing each other, the upper flat plate portion is inserted into the first tightening port and the second tightening port. One of the lower plate portions is provided with a tightening portion capable of adjusting the distance between the lower plate portion and the lower plate portion, and a substantially cylindrical single tube insertion portion having a bottom surface portion and an open top surface. The single tube has a female screw portion near the end and has a male screw insertion hole in the upper flat plate portion at substantially the same location as the female screw portion in a state where the lower flat plate portion and the upper flat plate portion face each other. A part of the male screw portion with the head facing up is fixed to the bottom surface portion of the insertion portion, and a fall prevention device is prepared in which the tip of the male screw portion protrudes downward from the bottom surface portion.
Positioned so that the reinforcing bar is sandwiched between the upper flat plate portion and the lower flat plate portion.
The tightening portion is inserted into the first tightening port and the second tightening port to adjust and fix the distance between the upper flat plate portion and the lower flat plate portion, and the male screw portion is attached to the female screw portion. By screwing, the reinforcing bar is tightened between the upper flat plate portion and the lower flat plate portion.
Insert a single tube into the single tube insertion part,
By the fall prevention method characterized by locking the lifeline, the main line, or the horizontal single tube to the single tube, the safety of the operator can be ensured by a simple operation even at the assembly site of the reinforcing bar without a vertical column. Can be done.

The fall prevention device and the fall prevention method in the present invention can be widely used in the field of preventing falls at a construction site.

10: Upper flat plate portion 11: First tightening port 12: Male screw insertion hole
20: Lower flat plate part 21: Second tightening port 22: Female thread part
30: Tightening part 31: Bolt 32: Fitting long nut
34: Washer
40: Single tube insertion part 41: Male thread part 43: Bottom part
50: Single tube 51: Hook part
100: Fall prevention device W: Welded part F: Reinforcing bar

Claims (4)

A fall prevention device that prevents falls at construction sites.
A long plate shape, and a flat portion on having a first fastening hole,
A long plate-shaped lower flat plate part with a second tightening port,
With the upper flat plate portion and the lower flat plate portion facing each other, bolts inserted into the first tightening port and the second tightening port are placed between the upper flat plate portion and the lower flat plate portion. Tightening part that holds the interval adjustable and
It is provided with a substantially cylindrical single tube insertion part having a bottom surface and an open top surface.
A male screw portion protrudes from the bottom surface portion of the single tube insertion portion.
A male screw insertion hole through which the male screw portion penetrates is provided in the vicinity of one end of the upper flat plate portion.
Fall prevention device, wherein the external thread portion has have a threadable female screw portion near one end of the lower flat plate portion. Both the first tightening port and the second tightening port are elongated holes.
The fall prevention device according to claim 1, wherein the tightening portion is slidable along the first tightening port and the second tightening port, which are the elongated holes. The male screw portion can adjust the distance between the upper flat plate portion and the lower flat plate portion by penetrating the male screw insertion hole and screwing into the female screw portion.
The first or second claim, wherein the single tube insertion portion, the upper flat plate portion, and the lower flat plate portion can be separated by releasing the screwing of the male screw portion with respect to the female screw portion. Fall prevention device. A long plate shape, and a flat portion on having a first fastening hole,
A long plate-shaped lower flat plate part with a second tightening port,
With the upper flat plate portion and the lower flat plate portion facing each other, bolts inserted into the first tightening port and the second tightening port are placed between the upper flat plate portion and the lower flat plate portion. Tightening part that holds the interval adjustable and
It is provided with a substantially cylindrical single tube insertion part having a bottom surface and an open top surface.
A male screw portion protrudes from the bottom surface portion of the single tube insertion portion.
A male screw insertion hole through which the male screw portion penetrates is provided in the vicinity of one end of the upper flat plate portion.
A fall prevention device characterized in that the male screw portion has a screwable female screw portion in the vicinity of one end of the lower flat plate portion is prepared.
Positioned so that the reinforcing bar is sandwiched between the upper flat plate portion and the lower flat plate portion.
The bolt is inserted into the first tightening port and the second tightening port to adjust and fix the distance between the upper flat plate portion and the lower flat plate portion, and the male screw portion is screwed into the female screw portion. Then, the reinforcing bar is tightened between the upper flat plate portion and the lower flat plate portion.
Insert a single tube into the single tube insertion part,
A fall prevention method comprising locking a lifeline, a main line, or a horizontal single tube to the single tube.

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