JP2020146090A - Device for preventing falling from loading platform of truck - Google Patents

Abstract

To provide a device for preventing falling from a loading platform of a truck, which may easily prevent falling from any sides of left and right of the loading platform of a truck, and with which work safety may be ensured even when the height of load changes.SOLUTION: Front extendable columns 12 are erected on the front left and right sides of a loading platform 8. Rear extendable columns 13 are erected on the rear left and right sides of the loading platform 8. The front extendable columns 12 are bridged each other and the rear extendable columns 13 are bridged each other, with horizontal members 14. A safety belt hanging bar or wire 15 is laid on the horizontal members 14 at front and rear side of the loading platform 8 in a manner of being slidable horizontally along the horizontal members 14.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fall prevention device from a freight vehicle carrier.

When working on a freight vehicle (truck) carrier, be sure to install a certain amount of equipment so that the work can be done with a safety belt, but manufacturers such as small and medium-sized enterprises do not have the equipment and the driver of the transportation company. The current situation is that the trucks are loaded and are careful not to fall when tightening the cargo.

According to Articles 518 to 521 of the Occupational Safety and Health Regulations, when working at a height of 2 meters or more, it is necessary to install fall prevention equipment such as having workers use safety belts. Has been done.

The freight vehicle (truck) bed is within 2 meters of the ground. However, workers often work by standing on a load that is higher than the truck bed. In this case, the worker will work at a height of more than 2 meters with respect to the ground, even if the height is within 2 meters with respect to the loading platform or the load. If it falls on the ground, the worker will suffer considerable physical damage and sometimes even life-threatening.

In addition, at construction sites such as buildings, the ground is excavated deep in the early stages of construction work to form the foundation and underground, and trucks that carry in and out materials are hung over the excavated cavities. It is customary to stop on the pier and load and unload materials. In such cases, it is important to ensure the safety of workers.

Conventionally, measures have been taken to prevent workers from falling as shown in FIG. 1 is a crane hook, 2 is a safety belt, 3 is a truck, and M is a worker. The crane hook 1 is usually attached to an overhead crane (not shown) or the like installed in the factory building, and is capable of moving up and down. The safety belt 2 is composed of a belt portion 2a worn around the waist of the worker and a rope 2b provided with a hook at the tip thereof.

When the truck 3 enters the factory, the worker M climbs on the loading platform using a ladder or the like, and hooks the hook provided at the tip of the rope 2b extending from the safety belt 2 attached to the truck 3 to the crane hook 1. As a result, even if the worker M is in danger of falling due to an imbalance at a high place on the truck 3 loading platform, the safety belt 2 hung on the crane hook 1 allows the worker M to move. You can prevent it from crashing on the floor.

However, the above-mentioned fall prevention measures have the following problems. First, a separate person was required to operate the overhead crane. That is, when the truck 3 enters the factory, the overhead crane is moved to the stop location of the truck 3 and the crane hook 1 is adjusted to an appropriate height. A crane operator was required in addition to the worker M. It is not appropriate from the viewpoint of efficiency to assign a plurality of personnel to one work in this way.

In addition, overhead cranes installed in the factory are very frequently used to transport various large items in the factory, and the transportation work thereof is usually prioritized. Therefore, until the transportation work is completed or a paragraph is reached, the work on the loading platform as described above cannot be started, or the work on the loading platform that has been started once has to be interrupted. Was there. This is the so-called crane waiting situation. This is also not a preferable state from the viewpoint of overall work efficiency.

In addition, as mentioned above, the work on the loading platform is basically done inside the factory. In the unlikely event that work is carried out outdoors, in order to ensure the safety of worker M, it is necessary to take measures in accordance with the above work, for example, by arranging a separate crane vehicle. In response to this, in order to safely complete the work on the loading platform, it is extremely inefficient, such as arranging a crane vehicle, operating the crane vehicle, and a wide stop area to safely stop the crane. Will be. Therefore, it was basically impossible to carry out the work on the loading platform outdoors.

The following Patent Document 1 is proposed as a worker fall prevention equipment that can ensure the safety of workers in aerial work required on a truck bed without using crane equipment such as an overhead crane in a factory. It is a thing.
Japanese Unexamined Patent Publication No. 11-291863

The worker fall prevention equipment is provided with a plurality of struts of variable length to which a flat plate parallel to the ground is attached to the bottom end thereof, and a rope passed between the tips of the plurality of struts. The support column is characterized in that it is fixed by applying the weight of the vehicle to the flat plate.

According to this, the safety against the fall of the worker is ensured by hooking the safety belt rope on the rope passed to the tips of the plurality of columns. In addition, since these columns have variable lengths, it is possible to handle work at various heights. Further, since a flat plate parallel to the ground is attached to the bottom end portions of the plurality of columns and a means for applying a vehicle load is taken on the flat plates, the columns themselves do not fall over. It is extremely suitable as a facility for preventing workers from falling.

As shown in FIG. 8, reference numeral 4 denotes a worker fall prevention facility, which includes a support column 5 and a main rope (class) 6.

The length of the support column 5 is variable. More specifically, the length of the support column 5 is adjusted by inserting and removing the small diameter support tube from the large diameter support tube. Further, by adjusting the length, when the desired length of the strut 5 as a whole is reached, a bolt is screwed into a plurality of bolt holes formed near the end of the large-diameter strut pipe and in the circumferential direction to reduce the diameter. By pressing the surface of the support column tube at the end of the bolt, the desired length can be kept constant.

A flat plate 5e parallel to the ground is attached to the bottom end of the support column 5. The flat plate 5e is attached to the bottom end of the large-diameter strut pipe described above by a joining means such as welding.

The master rope 6 is passed between the plurality of tips of the support column 5. At this time, the master rope 6 can be adjusted at the tip portion so as to have an appropriate tension between the tips of the two columns 5. As the structure of the main body of the main rope 6, for example, a steel cable surface coated with a vinyl material may be used.

First, in order to install the worker fall prevention equipment 4, that is, to erect the support column 5, the truck 3 is temporarily stopped at the place where the work is to be performed. Hereinafter, work on the loading platform will be performed in the vicinity of this temporary stop location, but in this case, the temporary stop location is a flat place where the truck 3 can stop, and a place where the safety of the surroundings is ensured. If so, it may be anywhere inside or outdoors of the factory.

The two columns 5 are arranged on one side of the track 3. At this time, the flat plate 5e at the bottom end of each of the columns 5 is positioned near the front of the front wheels 3a and the rear wheels 3b of the track 3, respectively. Further, before arranging the support columns 5, a main rope 6 having a length corresponding to the distance between the axles of the truck 3 is attached in advance.

After that, the track 3 is moved in the forward direction, and the flat plates 5e of the columns 5 arranged in the front and the rear are stepped on by the front wheels 3a and the rear wheels 3b. Here, the truck 3 is stopped at the main stop, more specifically, the side brake is applied to stop the truck surely. By carrying out the above work, each of the columns 5 is fixed by being loaded with the weight of the truck 3. That is, the worker fall prevention equipment 4 can be used under a stable condition without fear of falling. When these operations are completed, the worker M wearing the safety belt 2 climbs on the loading platform of the truck 3 and hooks the safety belt rope 2b on the main rope 6 to start the work.

As described above, the worker fall prevention equipment 4 of the present embodiment is secured by hooking the safety belt rope 2b on the main rope 6 passed between the two columns 5. Since the flat plate 5e at the bottom end of these columns 5 is pressed by the front wheels 3a and the rear wheels 3b of the truck 3, they do not easily fall and are extremely suitable as equipment for preventing falls. ..

Further, in relation to taking such fixing means, the installation location of the support column 5 can be freely selected as long as the truck 3 can safely stop. In particular, since the worker fall prevention equipment 4 does not use an overhead crane in a factory as described in the section of the prior art, it is possible to carry out the work outdoors, and the crane can be operated. No separate personnel such as persons are required, and it is possible to eliminate wasted time such as waiting for a crane.

It should be noted that the support column 5 as in Patent Document 1 is not such that the flat plate 5e is stepped on by the front wheels 3a and the rear wheels 3b, but may be a support column on which a fan of a truck bed or the like is erected.

In the case of ensuring the prevention of workers from falling by hooking the safety belt rope on the main rope passed between the two columns as in Patent Document 1, in order to prevent the cargo from falling from the left and right. , The equipment must be set on the left and right of the freight vehicle carrier (truck).

Moreover, since the height of the load changes depending on the loading or unloading, and the working height on the loading platform also changes, it is necessary to replace the main rope to correspond to the change.

An object of the present invention is to eliminate the inconvenience of the above-mentioned conventional example, to easily prevent a fall on either the left or right side of the freight vehicle carrier, and to ensure work safety against changes in the height of the load. The purpose is to provide a fall prevention device from a freight vehicle carrier that can ensure the performance.

In order to achieve the above object, the present invention according to claim 1 has front telescopic columns erected on the front left and right sides of the loading platform, rear telescopic columns erected on the rear left and right sides of the loading platform, and these front telescopic columns are erected. The gist is that the horizontal members are passed between the rear telescopic columns, and the safety belt hanging bar or wire is laid horizontally along the horizontal members on the front and rear horizontal members of the loading platform so that they can be slid horizontally. ..

According to the first aspect of the present invention, the safety belt hanging bar or wire is hung in the front-rear direction of the loading platform, whereby the body of a person who is about to fall can be received through the safety belt, and the safety belt can be received from the loading platform. It is possible to prevent the vehicle from falling.

In addition, since the safety belt or wire can slide sideways along the horizontal member, the safety belt or wire can be moved to the immediate vicinity for either left or right work on the freight vehicle carrier, preventing it from falling. Can be prepared.

Furthermore, since both the front support and the rear support of the loading platform can be expanded and contracted, the height of the safety belt hanging bar or wire that spans the front and rear of the loading platform can be changed according to the height change of the load, and the height of the work position can be changed. Can respond to changes.

The gist of the present invention according to claim 2 is that the safety belt hanging bar or wire slides on the horizontal member by a roller.

According to the second aspect of the present invention, the safety belt hanging bar or the wire is slid laterally along the horizontal member on the horizontal member in front of and behind the loading platform by sliding the horizontal member with a roller. It's easy to do.

The present invention according to claim 3 uses a one-stage cylinder for the front telescopic support and a multi-stage telescopic cylinder for the rear telescopic support, and the height difference between the front horizontal member and the rear horizontal member. The gist is that we were able to issue.

According to the third aspect of the present invention, since both the front support and the rear support of the loading platform can be expanded and contracted by the cylinder, the small diameter support tube can be freely inserted and removed from the large diameter support tube, and the end of the bolt. The length can be adjusted automatically and quickly compared to the telescopic structure that is pressed down by.

Moreover, the rear telescopic support can be changed in multiple stages with respect to the front telescopic support, and the safety belt hanging bar or wire that is hung in the front-rear direction of the loading platform can be hung diagonally so that the rear is lowered in the front-rear direction of the loading platform. It is possible, and it is possible to respond finely by changing the height of the load on the loading platform by straddling the torii gate in front of the loading platform.

As described above, the fall prevention device from the freight vehicle carrier of the present invention can easily prevent a fall on either the left or right side of the freight vehicle carrier, and also against changes in the height of the load. Can also ensure work safety.

It is a side view which shows one Embodiment of the fall prevention device from the freight vehicle loading platform of this invention. It is a top view which shows one Embodiment of the fall prevention device from the freight vehicle loading platform of this invention. It is a rear view which shows one Embodiment of the fall prevention device from the freight vehicle carrier of this invention. It is a side view of the state in which the rear telescopic support is lowered with respect to the front telescopic support which shows one embodiment of the fall prevention device from the freight vehicle carrier of this invention. It is a top view of the state which the rear telescopic support is lowered with respect to the front telescopic support which shows one Embodiment of the fall prevention device from the freight vehicle carrier of this invention. It is a rear view of the state in which the rear telescopic support is lowered with respect to the front telescopic support which shows one embodiment of the fall prevention device from the freight vehicle carrier of this invention. It is a side view which shows the conventional example. It is a side view which shows the other conventional example.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing one embodiment of a fall prevention device from a freight vehicle carrier of the present invention, FIG. 2 is a plan view of the same as above, FIG. 3 is a rear view of the same as above, and 7 in the figure is a freight vehicle, which is concrete as a large truck. Has been reduced.

In the figure, 8 is a loading platform having a fan 9 around it, 10 is a torii standing in front of the loading platform 8, and 11 is a driver's seat.

In the present invention, front telescopic struts 12 are erected on the front left and right sides of the loading platform 8, rear telescopic struts 13 are erected on the front left and right sides of the loading platform 8, and these front telescopic struts 12 and the rear telescopic struts 13 are erected. The horizontal member 14 was handed over to each other.

A one-stage cylinder was used for the front telescopic support column 12, and a multi-stage telescopic cylinder was used for the rear telescopic support column 13. As a result, the rear telescopic support column 13 has more stages of expansion / contraction length than the front telescopic support column 12, and can be made lower than the front telescopic support column 12. An air cylinder can be used as the cylinder of the front telescopic support column 12 and the rear telescopic support column 13.

Further, the horizontal member 14 is preferably a steel material or other rigid material, and a member serving as a rail is preferable. In the illustrated example, it is fixedly attached to the tip of the cylinder of the front telescopic support 12 and the tip of the rear telescopic support 13.

The front telescopic support column 12 is erected in front of the torii gate 10, for example, behind the driver's seat 11.

On the other hand, the rear telescopic support column 13 was erected further behind the loading platform 8 by providing a bracket or the like at the rear end of the loading platform 8.

The front telescopic support 12 and the rear telescopic support 13 are provided at positions that do not hinder the opening and closing of the fan 9 of the loading platform 8, and the maximum height at the time of extension is the front telescopic support 12 and the rear telescopic support. 13 is the same.

A safety belt hanging bar or wire 15 is attached along the horizontal member 14 to the front horizontal member 14 that bridges the front telescopic columns 12 to each other and the rear horizontal member 14 that bridges the rear telescopic columns 13 to each other. It was bridged so that it could be slid sideways.

As a mechanism for sliding the end of the safety belt bar or the wire 15, various mechanisms can be adopted as long as they have low frictional resistance. As an example, the horizontal member 14 is made to slide as a rail by the roller 16.

The safety belt hanging bar or wire 15 is made to be movable by hanging the safety belt 17 on it, and in the case of a wire, it is desirable that the wire can maintain a tense state.

Further, although not shown, the safety belt hanging bar or the wire 15 that moves the horizontal member 14 may be provided with a stopper that can be stopped at an appropriate position.

Next, to explain how to use it, when the front telescopic support 12 and the rear telescopic support 13 are extended, the horizontal member 14 also rises, and the safety belt hanging bar or the wire 15 is also positioned above the load on the loading platform 8. is there.

Therefore, by hanging the safety belt on the safety belt hanging bar or the wire 15, it is possible to prevent the worker who loads or unloads the load from falling.

If the work position is near the left side or the right side of the loading platform 8, move the safety belt hanging bar or the wire 15 with respect to the horizontal member 14 and move it near the left side or the right side of the loading platform 8. ..

As shown in FIGS. 4 to 6, the rear telescopic support 13 can be reduced so as to be lower than the front telescopic support 12, and as a result, the safety belt hanging bar or the wire 15 is lowered downward. It is hung diagonally.

As a result, it is possible to sufficiently cope with height changes due to loading or unloading of the load, and it is possible to straddle the torii gate 10 and to bridge the entire band bar or wire 15 without any trouble.

In the above embodiment, the freight vehicle 7 shows an example embodied as a large truck, but when it is necessary to work at a high place for some reason, not only a truck but also a dump truck, a trailer, or other vehicle. It is possible to provide the fall prevention device of the present invention.

Further, in Japanese Patent Application Laid-Open No. 59-179119, a roof having a substantially L-shaped cross section covering the upper surface and side surfaces of the cargo bed in the central space between the upper side of the front frame and the upper side of the rear frame of the cargo bed is symmetrical. The front frame and the upper side of the rear frame can be lifted by the cylinders provided in the main body of the front frame and the rear frame. However, the present invention is also applicable to such freight vehicles.

1 ... Crane hook 2 ... Safety belt 2a ... Belt part 2b ... Rope 3 ... Truck (vehicle)
3a ... Front wheel 3b ... Rear wheel 4 ... Worker fall prevention equipment 5 ... Support 5e ... Flat plate 6 ... Main rope 7 ... Truck 8 ... Cargo 9 ... Fan 10 ... Torii 11 ... Driver's seat 12 ... Front telescopic support 13 ... Rear Telescopic support 14 ... Horizontal material 15 ... Safety belt hanging bar or wire 16 ... Roller 17 ... Safety belt M ... Worker

The present invention relates to a fall prevention device from a freight vehicle carrier.

When working on a freight vehicle (truck) carrier, be sure to install a certain amount of equipment so that the work can be done with a safety belt, but manufacturers such as small and medium-sized enterprises do not have the equipment and the driver of the transportation company. The current situation is that the trucks are loaded and are careful not to fall when tightening the cargo.

According to Articles 518 to 521 of the Occupational Safety and Health Regulations, when working at a height of 2 meters or more, it is necessary to install fall prevention equipment such as having workers use safety belts. Has been done.

The freight vehicle (truck) bed is within 2 meters of the ground. However, workers often work by standing on a load that is higher than the truck bed. In this case, the worker will work at a height of more than 2 meters with respect to the ground, even if the height is within 2 meters with respect to the loading platform or the load. If it falls on the ground, the worker will suffer considerable physical damage and sometimes even life-threatening.

In addition, at construction sites such as buildings, the ground is excavated deep in the early stages of construction work to form the foundation and underground, and trucks that carry in and out materials are hung over the excavated cavities. It is customary to stop on the pier and load and unload materials. In such cases, it is important to ensure the safety of workers.

Conventionally, measures have been taken to prevent workers from falling as shown in FIG. 1 is a crane hook, 2 is a safety belt, 3 is a truck, and M is a worker. The crane hook 1 is usually attached to an overhead crane (not shown) or the like installed in the factory building, and is capable of moving up and down. The safety belt 2 is composed of a belt portion 2a worn around the waist of the worker and a rope 2b provided with a hook at the tip thereof.

When the truck 3 enters the factory, the worker M climbs on the loading platform using a ladder or the like, and hooks the hook provided at the tip of the rope 2b extending from the safety belt 2 attached to the truck 3 to the crane hook 1. As a result, even if the worker M is in danger of falling due to an imbalance at a high place on the truck 3 loading platform, the safety belt 2 hung on the crane hook 1 allows the worker M to move. You can prevent it from crashing on the floor.

However, the above-mentioned fall prevention measures have the following problems. First, a separate person was required to operate the overhead crane. That is, when the truck 3 enters the factory, the overhead crane is moved to the stop location of the truck 3 and the crane hook 1 is adjusted to an appropriate height. A crane operator was required in addition to the worker M. It is not appropriate from the viewpoint of efficiency to assign a plurality of personnel to one work in this way.

In addition, overhead cranes installed in the factory are very frequently used to transport various large items in the factory, and the transportation work thereof is usually prioritized. Therefore, until the transportation work is completed or a paragraph is reached, the work on the loading platform as described above cannot be started, or the work on the loading platform that has been started once has to be interrupted. Was there. This is the so-called crane waiting situation. This is also not a preferable state from the viewpoint of overall work efficiency.

In addition, as mentioned above, the work on the loading platform is basically done inside the factory. In the unlikely event that work is carried out outdoors, in order to ensure the safety of worker M, it is necessary to take measures in accordance with the above work, for example, by arranging a separate crane vehicle. In response to this, in order to safely complete the work on the loading platform, it is extremely inefficient, such as arranging a crane vehicle, operating the crane vehicle, and a wide stop area to safely stop the crane. Will be. Therefore, it was basically impossible to carry out the work on the loading platform outdoors.

The following Patent Document 1 is proposed as a worker fall prevention equipment that can ensure the safety of workers in aerial work required on a truck bed without using crane equipment such as an overhead crane in a factory. It is a thing.
Japanese Unexamined Patent Publication No. 11-291863

The worker fall prevention equipment is provided with a plurality of struts of variable length to which a flat plate parallel to the ground is attached to the bottom end thereof, and a rope passed between the tips of the plurality of struts. The support column is characterized in that it is fixed by applying the weight of the vehicle to the flat plate.

According to this, the safety against the fall of the worker is ensured by hooking the safety belt rope on the rope passed to the tips of the plurality of columns. In addition, since these columns have variable lengths, it is possible to handle work at various heights. Further, since a flat plate parallel to the ground is attached to the bottom end portions of the plurality of columns and a means for applying a vehicle load is taken on the flat plates, the columns themselves do not fall over. It is extremely suitable as a facility for preventing workers from falling.

As shown in FIG. 8, reference numeral 4 denotes a worker fall prevention facility, which includes a support column 5 and a main rope (class) 6.

The length of the support column 5 is variable. More specifically, the length of the support column 5 is adjusted by inserting and removing the small diameter support tube from the large diameter support tube. Further, by adjusting the length, when the desired length of the strut 5 as a whole is reached, a bolt is screwed into a plurality of bolt holes formed near the end of the large-diameter strut pipe and in the circumferential direction to reduce the diameter. By pressing the surface of the support column tube at the end of the bolt, the desired length can be kept constant.

A flat plate 5e parallel to the ground is attached to the bottom end of the support column 5. The flat plate 5e is attached to the bottom end of the large-diameter strut pipe described above by a joining means such as welding.

The master rope 6 is passed between the plurality of tips of the support column 5. At this time, the master rope 6 can be adjusted at the tip portion so as to have an appropriate tension between the tips of the two columns 5. As the structure of the main body of the main rope 6, for example, a steel cable surface coated with a vinyl material may be used.

First, in order to install the worker fall prevention equipment 4, that is, to erect the support column 5, the truck 3 is temporarily stopped at the place where the work is to be performed. Hereinafter, work on the loading platform will be performed in the vicinity of this temporary stop location, but in this case, the temporary stop location is a flat place where the truck 3 can stop, and a place where the safety of the surroundings is ensured. If so, it may be anywhere inside or outdoors of the factory.

The two columns 5 are arranged on one side of the track 3. At this time, the flat plate 5e at the bottom end of each of the columns 5 is positioned near the front of the front wheels 3a and the rear wheels 3b of the track 3, respectively. Further, before arranging the support columns 5, a main rope 6 having a length corresponding to the distance between the axles of the truck 3 is attached in advance.

After that, the track 3 is moved in the forward direction, and the flat plates 5e of the columns 5 arranged in the front and the rear are stepped on by the front wheels 3a and the rear wheels 3b. Here, the truck 3 is stopped at the main stop, more specifically, the side brake is applied to stop the truck surely. By carrying out the above work, each of the columns 5 is fixed by being loaded with the weight of the truck 3. That is, the worker fall prevention equipment 4 can be used under a stable condition without fear of falling. When these operations are completed, the worker M wearing the safety belt 2 climbs on the loading platform of the truck 3 and hooks the safety belt rope 2b on the main rope 6 to start the work.

As described above, the worker fall prevention equipment 4 of the present embodiment is secured by hooking the safety belt rope 2b on the main rope 6 passed between the two columns 5. Since the flat plate 5e at the bottom end of these columns 5 is pressed by the front wheels 3a and the rear wheels 3b of the truck 3, they do not easily fall and are extremely suitable as equipment for preventing falls. ..

Further, in relation to taking such fixing means, the installation location of the support column 5 can be freely selected as long as the truck 3 can safely stop. In particular, since the worker fall prevention equipment 4 does not use an overhead crane in a factory as described in the section of the prior art, it is possible to carry out the work outdoors, and the crane can be operated. No separate personnel such as persons are required, and it is possible to eliminate wasted time such as waiting for a crane.

It should be noted that the support column 5 as in Patent Document 1 is not such that the flat plate 5e is stepped on by the front wheels 3a and the rear wheels 3b, but may be a support column on which a fan of a truck bed or the like is erected.

In the case of ensuring the prevention of workers from falling by hooking the safety belt rope on the main rope passed between the two columns as in Patent Document 1, in order to prevent the cargo from falling from the left and right. , The equipment must be set on the left and right of the freight vehicle carrier (truck).

Moreover, since the height of the load changes depending on the loading or unloading, and the working height on the loading platform also changes, it is necessary to replace the main rope to correspond to the change.

An object of the present invention is to eliminate the inconvenience of the above-mentioned conventional example, to easily prevent a fall on either the left or right side of the freight vehicle carrier, and to ensure work safety against changes in the height of the load. The purpose is to provide a fall prevention device from a freight vehicle carrier that can ensure the performance.

In order to achieve the above object, the present invention according to claim 1 has a front telescopic support with a single-stage cylinder on the front left and right sides of the loading platform, and a rear telescopic support column with a multi-stage telescopic cylinder on the rear left and right sides of the loading platform. The horizontal members are passed between the front telescopic columns and the rear telescopic columns so that the height difference between the front horizontal members and the rear horizontal members can be made so that the front and rear sides of the loading platform can be different. The gist is that a safety belt hanging bar or wire is hung on the frame material so as to be slidable sideways along the front and rear horizontal members.

According to the first aspect of the present invention, the safety belt hanging bar or wire is hung in the front-rear direction of the loading platform, whereby the body of a person who is about to fall can be received through the safety belt, and the safety belt can be received from the loading platform. It is possible to prevent the vehicle from falling.

In addition, since the safety belt or wire can slide sideways along the horizontal member, the safety belt or wire can be moved to the immediate vicinity for either the left or right work on the freight vehicle carrier to prepare for fall prevention. be able to.

Furthermore, since both the front support and the rear support of the loading platform can be expanded and contracted, the height of the safety belt hanging bar or wire that spans the front and rear of the loading platform can be changed according to the height change of the load, and the height of the work position can be changed. Can respond to changes.

Furthermore , since both the front strut and the rear strut of the loading platform can be expanded and contracted by the cylinder, the strut pipe with a small diameter can be freely inserted and removed from the large diameter strut pipe, and compared with the telescopic structure that is pressed by the end of the bolt. Therefore, the length can be adjusted automatically and quickly.

Moreover, the rear telescopic support can be changed in multiple stages with respect to the front telescopic support, and the safety belt hanging bar or wire that is hung in the front-rear direction of the loading platform can be hung diagonally so that the rear is lowered in the front-rear direction of the loading platform. It is possible, and it is possible to respond finely by changing the height of the load on the loading platform by straddling the torii gate in front of the loading platform.

The gist of the present invention according to claim 2 is that the safety belt hanging bar or wire slides on the horizontal member by a roller.

According to the second aspect of the present invention, the safety belt hanging bar or the wire is slid laterally along the horizontal member on the horizontal member in front of and behind the loading platform by sliding the horizontal member with a roller. It's easy to do.

As described above, the fall prevention device from the freight vehicle carrier of the present invention can easily prevent a fall on either the left or right side of the freight vehicle carrier, and also against changes in the height of the load. Can also ensure work safety.

It is a side view which shows one Embodiment of the fall prevention device from the freight vehicle loading platform of this invention. It is a top view which shows one Embodiment of the fall prevention device from the freight vehicle loading platform of this invention. It is a rear view which shows one Embodiment of the fall prevention device from the freight vehicle carrier of this invention. It is a side view of the state in which the rear telescopic support is lowered with respect to the front telescopic support which shows one embodiment of the fall prevention device from the freight vehicle carrier of this invention. It is a top view of the state which the rear telescopic support is lowered with respect to the front telescopic support which shows one Embodiment of the fall prevention device from the freight vehicle carrier of this invention. It is a rear view of the state in which the rear telescopic support is lowered with respect to the front telescopic support which shows one embodiment of the fall prevention device from the freight vehicle carrier of this invention. It is a side view which shows the conventional example. It is a side view which shows the other conventional example.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing one embodiment of a fall prevention device from a freight vehicle carrier of the present invention, FIG. 2 is a plan view of the same as above, FIG. Has been reduced.

In the figure, 8 is a loading platform having a fan 9 around it, 10 is a torii standing in front of the loading platform 8, and 11 is a driver's seat.

In the present invention, the front telescopic columns 12 are erected on the front left and right sides of the loading platform 8, and the rear telescopic columns 13 are erected on the front left and right sides of the loading platform. The horizontal member 14 was handed over to each other.

A one-stage cylinder was used for the front telescopic support column 12, and a multi-stage telescopic cylinder was used for the rear telescopic support column 13. As a result, the rear telescopic support column 13 has more stages of expansion / contraction length than the front telescopic support column 12, and can be made lower than the front telescopic support column 12. An air cylinder can be used as the cylinder of the front telescopic support column 12 and the rear telescopic support column 13. As a result, the height difference between the front horizontal member and the rear horizontal member can be made.

Further, the horizontal member 14 is preferably a steel material or other rigid material, and a member serving as a rail is preferable. In the illustrated example, it is fixedly attached to the tip of the cylinder of the front telescopic support 12 and the tip of the rear telescopic support 13.

The front telescopic support column 12 is erected in front of the torii gate 10, for example, behind the driver's seat 11.

On the other hand, the rear telescopic support column 13 was erected further behind the loading platform 8 by providing a bracket or the like at the rear end of the loading platform 8.

The front telescopic support 12 and the rear telescopic support 13 are provided at positions that do not hinder the opening and closing of the fan 9 of the loading platform 8, and the maximum height at the time of extension is the front telescopic support 12 and the rear telescopic support. 13 is the same.

A safety belt hanging bar or wire 15 is attached along the horizontal member 14 to the front horizontal member 14 that bridges the front telescopic columns 12 to each other and the rear horizontal member 14 that bridges the rear telescopic columns 13 to each other. It was bridged so that it could be slid sideways.

As a mechanism for sliding the end of the safety belt bar or the wire 15, various mechanisms can be adopted as long as they have low frictional resistance. As an example, the horizontal member 14 is made to slide as a rail by the roller 16.

The safety belt hanging bar or wire 15 is made to be movable by hanging the safety belt 17 on it, and in the case of a wire, it is desirable that the wire can maintain a tense state.

Further, although not shown, the safety belt hanging bar or the wire 15 that moves the horizontal member 14 may be provided with a stopper that can be stopped at an appropriate position.

Next, to explain how to use it, when the front telescopic support 12 and the rear telescopic support 13 are extended, the horizontal member 14 also rises, and the safety belt hanging bar or the wire 15 is also positioned above the load on the loading platform 8. is there.

Therefore, by hanging the safety belt on the safety belt hanging bar or the wire 15, it is possible to prevent the worker who loads or unloads the load from falling.

If the work position is near the left side or the right side of the loading platform 8, move the safety belt hanging bar or the wire 15 with respect to the horizontal member 14 and move it near the left side or the right side of the loading platform 8. ..

As shown in FIGS. 4 to 6, the rear telescopic support 13 can be reduced so as to be lower than the front telescopic support 12, and as a result, the safety belt hanging bar or the wire 15 is lowered downward. It is hung diagonally.

As a result, it is possible to sufficiently cope with height changes due to loading or unloading of the load, and it is possible to straddle the torii gate 10 and to bridge the entire band bar or wire 15 without any trouble.

In the above embodiment, the freight vehicle 7 shows an example embodied as a large truck, but when it is necessary to work at a high place for some reason, not only the truck but also other vehicles such as dump trucks and trailers, It is possible to provide the fall prevention device of the present invention.

Further, in Japanese Patent Application Laid-Open No. 59-179119, a roof having a substantially L-shaped cross section covering the upper surface and side surfaces of the cargo bed in the central space between the upper side of the front frame and the upper side of the rear frame of the cargo bed is symmetrical. The front frame and the upper side of the rear frame can be lifted by the cylinders provided in the main body of the front frame and the rear frame. However, the present invention is also applicable to such freight vehicles.

1 ... Crane hook 2 ... Safety belt 2a ... Belt part 2b ... Rope 3 ... Truck (vehicle)
3a ... Front wheel 3b ... Rear wheel 4 ... Worker fall prevention equipment 5 ... Support 5e ... Flat plate 6 ... Main rope 7 ... Truck 8 ... Cargo 9 ... Fan 10 ... Torii 11 ... Driver's seat 12 ... Front telescopic support 13 ... Rear Telescopic support 14 ... Horizontal material 15 ... Safety belt hanging bar or wire 16 ... Roller 17 ... Safety belt M ... Worker

Claims (3)

Front telescopic columns are erected on the front left and right sides of the loading platform, rear telescopic columns are erected on the rear left and right sides of the loading platform, and horizontal members are passed between these front telescopic columns and rear telescopic columns, and the loading platform is passed. A fall prevention device from a freight vehicle carrier, characterized in that a safety belt hanging bar or wire is laid horizontally along the horizontal members on the front and rear horizontal members. The fall prevention device from a freight vehicle carrier according to claim 1, wherein the safety belt hanging bar or wire slides on a horizontal member by a roller. Claim 1 or claim 1 or which uses a one-stage cylinder for the front telescopic support and a multi-stage telescopic cylinder for the rear telescopic support so that the height difference between the front horizontal member and the rear horizontal member can be made. The fall prevention device from the freight vehicle carrier according to claim 2.

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