JP2022055189A - High place fall prevention device - Google Patents

Abstract

To provide a compact and tough fall prevention device which can secure safety in high place work with a simple structure as a safety measure conforming to labor safety regulations in cargo work on a truck load-carrying platform, especially on a roof panel.SOLUTION: A high place fall prevention device 1 for preventing fall in high place work on a roof panel 11 or the like of a transport vehicle 2 comprises: a footboard 4 which fixes wheels of the transport vehicle 2 with the wheels getting over the upper surface thereof; and a main column 5 which is erected from the footboard 4. The main column 5 has a lifting column which can move while expanding/contracting toward an upper side and can be fixed at a prescribed height, and a safety block 20 is provided on an upper end side of the lifting column.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fall prevention device that prevents a cargo handling operator from falling from a loading platform or the like during cargo handling work in a transport vehicle such as a truck or a trailer, and particularly rides on a roof panel or the like on a driver's cab. The present invention relates to a device for preventing a worker from falling during work at a high place or cargo handling work in a narrow factory.

According to Article 518 of the Industrial Safety Regulations, when working at a height of 2 meters or more, if there is a risk of danger to workers due to a crash, a work floor must be provided by means such as assembling scaffolding. The rules that must be stipulated.
When it is difficult to provide a work floor, it is said that measures must be taken to prevent the danger of workers due to a crash, such as installing a net and having workers use safety belts.
Generally, the truck bed is about 1 m from the ground, but depending on the size of the load, you may stand on it to work, and if you need to work at a high place on the roof panel. Work will occur at a height of 2 m or more from the ground, and the danger of a crash is predicted.

In FIG. 5, which shows a conventional example, in the type in which the support column 26 is attached to the tilt 25 of the truck 2 in the front-rear direction, the strength of the tilt 25 itself is affected.
In addition, the height of the support column 26 cannot be set high due to its strength, and when the worker falls, the main rope 27 may be stretched out and collide with the ground. Further, there is a problem in work such that the tilt 25 cannot be knocked down during the work.

Therefore, a pair of elevating columns are erected on the ground on the side of the truck along the side surface of the truck, and a main rope is stretched between the tips of the elevating columns with appropriate tension. There is also a fall prevention facility that aims for safety by applying a rope (see Patent Document 1).
In addition, a telescopic support is provided on the loading platform of another vehicle that can be laid horizontally on the side of the truck, a horizontal arm that can rotate around the support is provided at the upper end of the support, and a safety block is connected to the tip of this horizontal arm. There is also a facility to prevent falls during cargo handling work (see Patent Document 2).

Japanese Unexamined Patent Publication No. 11-291863 JP-A-2002-104776

However, the fall prevention equipment in the case of Patent Document 1 described above requires a pair of elevating columns to be installed on the ground on the side surface of the truck, and may not be installed depending on the scale of a narrow factory or an external work place. ..
Especially for trucks, the height of the columns is low for work on the roof panel, which is work at high places, and it was a device that was not used for work at high places.
Further, in the fall prevention equipment in the case of Patent Document 2 described above, it is troublesome to prepare a dedicated automobile equipped with a fall prevention equipment on the loading platform, and it is suitable for a vehicle in a narrow factory or a cargo handling work place having a limited area. It was difficult to use a dedicated car to lie down.

Further, when the main rope is stretched on the truck bed, if the support rod or the like is provided on the truck, there is a concern that it may hinder the truck running.
In particular, some large trucks are configured so that their vehicle width matches the general road width and lane width, and when passing through narrow roads, the vehicle width is almost free. There are many cases where it is done.

In such a truck, it is not realistic to newly install a main rope support device protruding in the vehicle width direction.
Further, for loading and unloading luggage and loads on the loading platform, not only workers but also loading and unloading equipment such as lifts and various lifting heavy machines may be used, so that the space around the loading platform is widely used.
For this reason, it is difficult to always provide a master rope support device around the loading platform even for a support rod that is not extended in the vehicle width direction.
Therefore, a compact high-altitude fall prevention device that can be installed even when working on a loading platform or a roof panel is preferable.

Therefore, if the other end of the safety rope, one end of which is fixed to the worker's waist belt on the loading platform, is fixed to the elevating ramp attached to the truck or hung on the hatch of the dump, the loading platform is wide. Therefore, the length of the safety rope is extended, which does not help prevent the rope from falling from the loading platform.
Further, even if the main rope is stretched diagonally on the loading platform, the length of the safety rope is similarly long, so that the function of preventing the main rope from falling from the loading platform may not be achieved as described above.

In this way, a safety rope that can properly lift an operator when dropped from a loading platform or roof panel can be operated only during the required work in an appropriate position, such a truck. There has been no known high-altitude fall prevention device for ensuring the safety of work on the truck bed or roof panel.

Therefore, the present invention has been made in view of the conventional problems, and as a safety measure in accordance with the Industrial Safety Regulations during cargo handling work on a truck bed, especially on a roof panel, a worker can move freely, such as a vehicle and a wall. An aerial fall prevention device that is easy to install even in places where there is only a narrow work space with a gap of 1 m or less between them, and has a lightweight, tough and compact structure that can ensure safety when working at high altitudes on trucks. The purpose is to provide.

The high-altitude fall prevention device according to the present invention is a high-altitude fall prevention device (1) for preventing a fall during aerial work on the roof panel (11) of the transport vehicle (2), and is a transport vehicle (2). It is provided with a tread plate (4) for fixing the wheels by riding on the upper surface, and a main strut (5) erected from the tread plate (4). It is characterized by having an elevating column that can be fixed to a height and having a safety block (20) on the upper end side of the elevating column.
For example, as a more specific form, a tread plate in which the wheels of a transport vehicle are placed on the upper surface and fixed to the ground surface, a main strut that is fixed to the tread plate and extends upward, and a sliding inside the main strut. It is equipped with a medium-diameter elevating strut that is movably held and a small-diameter elevating strut that is inserted into the elevating strut. A lock pin is inserted into the pin holes that are drilled and communicated at the telescopic position, the main strut and the medium-diameter / small-diameter elevating strut are fixed to each other, the small-diameter elevating strut is provided with a safety block at the upper end, and the tread plate is An example is an example in which a plurality of flanges are fixed to the upper surface and casters rotatably held are provided on each of the flanges.

In the present invention, the safety block (20) may have a wire rope (23) that can be pulled out, and may have a hook (22) at the tip of the wire rope (23).

Further, in the present invention, the elevating column is a medium-diameter elevating column (6) provided on the main column (5) so as to be able to move up and down, and a small-diameter elevating column (6) provided on the medium-diameter elevating column (6) so as to be able to move up and down. 7) is provided, and the fixing means for fixing the height between the main column (5), the medium-diameter elevating column (6), and the small-diameter elevating column (7) is a lock pin (17). The lock pin (17) may be provided with a fastening wire rope (18) for preventing steady rest.

In the aerial fall prevention device for preventing a fall in aerial work on the roof panel of a transport vehicle or the like, the present invention is stable because the main strut is fixed to the lower side of the wheel via the tread.
Further, for example, by interpolating small-diameter and medium-diameter elevating columns into the main column so as to be slidable with each other, the entire column can be configured as a tough high-altitude fall prevention device.
Since the treads on which the main columns are fixed by welding or the like are placed so as to ride on the upper surface of the wheels of the transport vehicle and fixed to the ground surface, each column can be safely and surely fixed to the ground surface.
In addition, the height position of the main strut and the medium-diameter / small-diameter elevating strut can be easily set and fixed by simply inserting the lock pin into the pin hole that opens at the position where it expands and contracts with each other.
By providing a safety block at the upper end of the small-diameter elevating column, safe work can be performed on the roof panel, which is a high place of the transportation vehicle, and there is no need for troublesome work to stretch the main rope over the entire vehicle, so a large work area is available. Can be secured.
In the example of storing the medium-diameter and small-diameter elevating columns in the main column, the high-altitude fall prevention device can be made into a small, lightweight and compact device, and the work of moving and installing on a transportation vehicle can be easily moved and installed using casters. effective.
Furthermore, if the lock pin inserted into the medium-diameter or small-diameter elevating column is equipped with a steady resting wire rope, the wire rope can be fastened to the elevating ramp or the like to prevent the high-altitude fall prevention device from running out. It can act as a function.

The whole outline view seen from the side which shows the use example of the high place fall prevention device which concerns on this invention is shown. An overall schematic view showing the high-altitude fall prevention device of FIG. 1 is shown. The perspective view which shows the high place fall prevention device of FIG. 1 is shown. A schematic diagram showing a state in which an operator moves the high-altitude fall prevention device of the present invention is shown. An overall schematic diagram showing the installation state of the conventional fall prevention device is shown.

Hereinafter, a structural example of the high-altitude fall prevention device according to the present invention will be described with reference to FIGS. 1 to 4 of Examples.

As shown in FIG. 1, the high-altitude fall prevention device 1 of the present invention is used by arranging it on the side of the loading platform 3 or the driver's cab 10 of the truck 2, and the basic of the high-altitude fall prevention device 1 is a tread plate. 4. It is composed of a main strut 5, a medium-diameter elevating strut 6, a small-diameter elevating strut 7, and the like.

The main support 5 is preferably formed of a cylindrical material or a square material having a cylindrical guide portion in a square cylinder as shown in FIGS. 2 and 3, and the lower end of the main support 5 is fixed to a flat plate-shaped tread plate 4. By installing the tread 4 on the ground surface, the main support 5 is erected.
The medium-diameter elevating column 6 is inserted into a cylindrical guide portion provided inside a main column 5 having a square cross section, and the small-diameter elevating column 7 is incorporated in the medium-diameter elevating column 6 to elevate the medium-diameter / small-diameter column. The columns 6 and 7 can slide in the vertical direction with each other.
Due to this sliding structure, even if the small-diameter elevating column 7 and the medium-diameter elevating column 6 are slid with each other and extended upward, the sliding guide is provided in the main column 5 made of a strong square lumber to cause a drop in a high place. The overall strength of the prevention device 1 can be made tough, and even if the column is extended upward and used, there is little risk of bending and bending.

The tread 4 is made of a rectangular metal plate, and as shown in FIG. 3, the vertical width YY is the wheel (front wheel 8 or rear wheel 9) of the truck 2, that is, a cross section in the axial direction of the tire. It is formed longer than the width.
Further, the width XX is formed wider than the length of the contact patch in the front-rear direction of the tire.
In this embodiment, the width XX is 500 mm and the height YY is 700 mm.
Further, when the medium-diameter elevating column 6 and the small-diameter elevating column 7 are set and fixed to the main column 5 in the state of being most extended upward, they are configured to extend higher than the total height of the truck 2.

The main column 5 and the tread 4 are reinforced and fixed by welding a plurality of angles 4a.
Further, the fixed position of the support column 5 with respect to the tread plate 4 is a substantially intermediate position of a position biased to one side on the upper surface of the tread plate 4, that is, one side in the vertical width YY direction of the tread plate 4, and the width XX direction. It is located in the middle position of.
Therefore, as shown in FIG. 3, a predetermined wide space is secured at the center upper surface position of the tread 4, and this space becomes a mounting surface 13 on which the front wheels (tires) 8 or the rear wheels 9 of the truck 2 can be mounted. ing.

As shown in the perspective view of FIG. 3, the high-altitude fall prevention device 1 has the main support 5 erected and fixed at a position substantially intermediate to one side of the upper surface of the tread 4, while the main column 5 is erected and fixed to one side of the same upper surface of the tread 4. One flange 14 is provided on each of the left and right sides.
Each of the flanges 14 is provided with one caster 15 held rotatably while being pivotally supported.
The wheels of the casters 15 and 15 come into contact with the ground surface by tilting the tread 4 toward the mounting side of the casters 15.
As a result, by using the caster 15 as a driving wheel, the high-altitude fall prevention device 1 can be easily rolled and moved to a predetermined side position of the truck 2.

The main strut 5, the medium-diameter elevating strut 6, and the small-diameter elevating strut 7 each have a plurality of pin holes 16 formed in the vertical axis one-row direction on the side portions thereof.
By aligning the opening positions of the pin holes 16 with each other to make them communicate with each other and inserting the lock pin 17 into them, the main strut 5, the medium-diameter elevating strut 6 and the small-diameter elevating strut 7 are set to predetermined expansion / contraction positions. Can be fixed.
When changing the telescopic positions of the main strut 5, the medium-diameter elevating strut 6, and the small-diameter elevating strut 7, the lock pin 17 is pulled out from the pin hole 16, and the main strut 5 or the medium-diameter / small-diameter elevating columns 6 and 7 are expanded and contracted as specified. After adjusting to the height position, the lock pin 17 can be reinserted into the pin hole 16 and fixed with a nut or the like (not shown) to change the height and fix the lock pin 17.
Further, if necessary, a fastening wire rope 18 is provided on the lock pin 17 used according to the expansion / contraction height of the main strut 5 and the medium-diameter elevating strut 6 or the small-diameter elevating strut 7, and the fastening wire rope 18 is used as the elevating ramp 12 of the vehicle. By fastening the wire to the above, it can act as a steady rest prevention function of the high-altitude fall prevention device 1.

A safety block 20 is provided on the uppermost portion of the small-diameter elevating column 7 in a suspended state via a hanging metal fitting 19 such as a carabiner.
The safety block 20 is provided with a wire rope 23 wound around the block body 21, a hook 22 is attached to the tip of the wire rope 23, and the hook 22 is connected to a safety belt S attached to the waist of the worker M. It is intended to be used.
Further, if the wire rope pulling rope 24 is provided at the tip of the hook 22, the wire rope 23 can be slowly pulled out from the block main body 21 as the worker M moves at a normal walking speed.
On the contrary, when the worker M approaches the block main body 21, the extra wire rope 23 is automatically wound by the spring force wound in the block main body 21.
Then, when the worker M falls or the like, the wire rope 23 is pulled out at a constant speed or higher, so that the lock mechanism built in the block body 21 automatically works to prevent the wire rope 23 from being pulled out further. It is possible to prevent a fall accident.

Next, the usage state of the high-altitude fall prevention device 1 will be described.
First, as shown in FIG. 4, the worker M moves the high-altitude fall prevention device 1 to a position near the front and rear of the front wheel 8 of the truck 2 stopped at the work site where the cargo is loaded and unloaded, using the casters 15. ..
At this time, the main support 5 of the tread 4 of the high-altitude fall prevention device 1 is inserted into the lower surface of the vehicle of the truck 2 so as to be located outside the front wheel 8 in the axial direction, and the main support 5 stands upright at the side position of the truck 2. Place it on the ground surface so that it does.
This mobile installation work of the high-altitude fall prevention device 1 has a large space that allows the high-altitude fall prevention device 1 to be inserted in front of and behind the tires of the vehicle even when the work space becomes narrow when the vehicle enters the factory or the like. If it can be secured, it can be installed, and even one worker can easily do it.

After that, the truck 2 is moved forward or backward, and the front wheel 8 is stopped at the position where the front wheel 8 is mounted on the mounting surface 13 of the tread 4.
As a result, the tread 4 is pressed against the ground surface by the load of the truck 2, and the upright state of the main column 5 is stably maintained.

Next, the medium-diameter elevating column 6 and the small-diameter elevating column 7 are extended upward from the main column 5, and the lock pins 17 and 17 are inserted into the pin holes 16 and 16 to insert the medium-diameter elevating column 6 and the small-diameter elevating column 7 and the main column. 5 is set at a predetermined expansion / contraction height position and fixed.
At this time, when working on the roof panel 11, the tip of the small-diameter elevating column 7 is set to a height exceeding the height of the roof panel 11.
Next, by pulling the hook 22 exposed from the safety block 20 downward using the wire rope drawing rope 24, the hook 22 can be hooked on the safety belt S attached to the waist of the worker M. ..
After that, the wire rope pull-out rope 24 is removed from the hook 22.

Then, the worker M can move onto the roof panel 11 by climbing the elevating ramp 12 provided on the side of the driver's cab 10 of the truck 2.
At this time, if there is a possibility that the high-altitude fall prevention device 1 may swing laterally due to wind or the like, the fastening wire rope 18 provided on the lock pin 17 can be hooked on the elevating ramp 12 or another hooking member. It can be used safely.
At the time of this work, the hook 22 of the safety block 20 is moved with the worker M by winding the wire rope 23 according to the upward movement of the worker M.
After that, the worker M performs predetermined work such as packing and slinging on the roof panel 11 and the loading platform 3.
When this predetermined work is completed, the worker M gets off the elevating ramp 12 and finishes the work.
Also at this time, the hook 22 can slowly move together with the worker M to prevent the hook 22 from falling.

With the above configuration, in this embodiment, the worker M performs a simple setting and fixing work of simply placing the front wheel 8 of the truck 2 on the tread 4, and the main support 5 and the medium-diameter elevating support 6 of the high-altitude fall prevention device 1. And the small diameter elevating column 7 can be firmly and stably upright and fixed.
By hanging the safety belt S of the worker M on the hook 22 pulled out from the safety block 20 provided on the upper part of the small-diameter elevating column 7, the worker M accidentally fell from the roof panel 11 or the loading platform 3 at a high place. Even so, the wire rope 23 is pulled out at a certain speed or higher, the lock mechanism of the safety block 20 automatically works, and the wire rope 23 is prevented from being pulled out any further, so that a fall accident from the truck 2 can be prevented. , The worker M can avoid the collision with the ground surface.

1 High-altitude fall prevention device 2 Truck (transport vehicle)
3 Loading platform 4 Stair tread, 4a Angle 5 Main strut 6 Medium diameter elevating strut 7 Small diameter elevating strut 8 Front wheel 9 Rear wheel 10 Driver's cab (cab)
11 Roof panel 12 Elevating tarlap 13 Mounting surface 14 Flange 15 Caster 16 Pin hole 17 Lock pin 18 Fastening wire rope 19 Hanging bracket 20 Safety block 21 Block body 22 Hook 23 Wire rope 24 Wire rope pulling rope 25 Side tilting plate 26 Prop 27 Main rope M Worker S Safety belt

Claims (3)

It is a high-altitude fall prevention device (1) that prevents a fall during aerial work on the roof panel (11) of the transport vehicle (2).
It is provided with a tread (4) for fixing the wheels of the transport vehicle (2) by riding on the upper surface, and a main support (5) erected from the tread (4).
The main column (5) is characterized by having an elevating column that can be expanded and contracted upward and can be fixed at a predetermined height, and has a safety block (20) on the upper end side of the elevating column. A high-altitude fall prevention device. The height according to claim 1, wherein the safety block (20) has a wire rope (23) that can be pulled out, and has a hook (22) at the tip of the wire rope (23). Fall prevention device. The elevating column is provided with a medium-diameter elevating column (6) provided on the main column (5) so as to be able to move up and down, and a small-diameter elevating column (7) provided on the medium-diameter elevating column (6) so as to be able to move up and down. The fixing means for fixing the height between the main column (5), the medium-diameter elevating column (6), and the small-diameter elevating column (7) is a lock pin (17), and the lock pin (17) has a fixing means. The high-altitude fall prevention device according to claim 1 or 2, wherein a fastening wire rope (18) for preventing steady rest is provided.

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