JP2020168222A - Pole and fall prevention device - Google Patents

Abstract

To provide a pole and a device that can reduce a fall accident, without damaging a fence which is an enclosure for the periphery of a loading deck.SOLUTION: This pole is one for the use of installing a rope, including: a bar-like member 41 which extends perpendicularly along the outer face of the planar member of a vehicle that has a loading deck and an enclosure of a loading deck periphery composed of a plurality of planar members and which is arranged, with the lower end in contact with the ground; an upper member 42 which is installed in the bar-like member 41 and which connects one of the rope; an intermediate member 43 which is set in the bar-like member 41, which clips the upper end part of the planar members, and which is fastened to the planar member; and a lower part member 44 which is provided in the bar-like member 41 and which has a face adjacent to the lower side of the loading deck.SELECTED DRAWING: Figure 3

Description

The present invention relates to a support column used for erection of a rope and a fall prevention device using the support column.

Vehicles such as trucks that have a loading platform for loading materials are used to bring materials to construction sites. The unloading of materials from the truck is carried out by the worker on the loading platform. At that time, in order to prevent the material from falling from the loading platform, a support column is erected and a rope as a handrail is erected on the support column. Workers can prevent them from falling off the loading platform by hooking the hook of the safety belt on the erected rope.

As a device for preventing such a fall, a device for attaching a support to a metal tread on which wheels are mounted to hold the support in an upright state (see Patent Document 1), or a support for standing on a fan that is an enclosure around the loading platform. Devices to be installed (see Patent Document 2) and the like have been proposed.

JP-A-2009-61191 Japanese Unexamined Patent Publication No. 2006-174953

However, in the device described in Patent Document 1 described above, since the fulcrum is located at the attachment portion between the tread plate and the support column, the position of the upper part where the rope is stretched becomes unstable, a restraint rope is required, and the rear wheel is rearward. There was a problem that there was a possibility of a fall because the fall was not taken into consideration.

The device described in Patent Document 2 described above has a structure in which the load at the time of falling is entirely borne by the fan, so that there is a problem that the fan is damaged.

The present invention has been made in view of the above problems, and is a support column used for erection of a rope.
A rod-shaped member that extends vertically along the outer surface of the plate-shaped member of a vehicle having a loading platform and an enclosure around the loading platform composed of a plurality of plate-shaped members, and whose lower end is arranged in contact with the ground.
An upper member provided on the rod-shaped member and connecting one end of the rope,
An intermediate member provided on the rod-shaped member, sandwiching the upper end of the plate-shaped member, and fixed to the plate-shaped member,
A strut is provided that includes a lower member that is provided on the rod-shaped member and has a surface adjacent to the underside of the bed.

According to the present invention, it is possible to reduce a fall accident without damaging the fan that is the enclosure around the loading platform.

The figure which showed an example of the column and the fall prevention device used conventionally. The figure which showed an example of the fall prevention device of this embodiment. The figure which showed an example of the support column used for a fall prevention device. The figure which showed an example of the upper member which constitutes a support. The figure which showed an example of the intermediate member which constitutes a support. The figure which showed an example of the lower member which constitutes a support. The figure explaining the fixing method of a support. The figure explaining the fixing method of a support. The figure which showed the use example of the fall prevention device. The figure which showed another example of the column.

Before explaining the support column and the fall prevention device of the present invention, the conventionally used support column and the fall prevention device will be briefly described. As shown in FIG. 1A, the support column (stanchion) 10 is provided with a pole 11 which is one of the rod-shaped members, and a locking claw (hook) provided on the pole 11 and provided at one end of the rope is hooked. It is composed of a hook hook 12 as a substantially U-shaped locking portion that forms a hole for connecting, and a plate 13 that is attached to the lower end of the pole 11 and whose lower surface is adjacent to the ground.

As shown in FIG. 1B, the stanchion 10 is fixed by arranging the plate 13 on the ground 20 to erect the pole 11 and stepping on the plate 13 on the wheels 23 of the vehicle (truck) 22 having the loading platform 21. Wheel. When the truck 22 has a driver's seat (cabin) 24 in front of the loading platform 21 and a torii (guard) is attached behind the cabin 24, a rope is erected from the guard to the stanchion 10 fixed by stepping on the rear wheel. To. The rope is a main rope 30 that hooks a hook of a safety belt worn by a worker to prevent the rope from falling.

If no guard is attached to the rear of the cabin, another stanchion 10 is prepared, stepped on by the front wheels and fixed, and the main rope 30 is erected from one stanchion 10 to the other stanchion 10. By stretching the main rope 30 in this way and hooking the safety belt of the worker who works on the loading platform 21 of the truck 22 on the main rope 30, it is possible to prevent the truck from falling from the loading platform 21.

The height at which the main rope 30 is erected is substantially the same as the top of the cabin 24, and the pole 11 needs to be approximately equal to the length from the ground to the top of the cabin 24. Then, the length of the pole 11 is relatively long, and the fulcrum is the attachment position A to the plate 13, so that the upper end of the pole 11 to which the main rope 30 is connected sways greatly, and the main rope 30 also shakes accordingly. It will shake and the sense of stability is low.

Further, since the stanchion 10 is fixed by stepping on the plate 13 on the rear wheel of the truck 22, the main rope 30 is stretched on the portion of the loading platform 21 behind the rear wheel (the portion indicated by the alternate long and short dash line in FIG. 1). It is not possible to prevent the fall.

In order to solve the problem that the main rope 30 cannot be stretched behind the rear wheels, which has a low sense of stability, the stanchion has the following configuration. FIG. 2 is a diagram showing an example of a fall prevention device of the present embodiment. The fall prevention device includes a stanchion 40 and a main rope 30. FIG. 3 is a diagram showing an example of a stanchion 40 used in a fall prevention device.

The truck 22 has a cabin 24 in front, a guard on the rear side of the cabin 24, and a loading platform 21 on the rear side thereof. The truck 22 has a fan 25 which is an enclosure on the outer circumference of the loading platform 21. The fan 25 is an enclosure around the outer periphery of the loading platform of an open truck with no covering on the upper part, and is composed of a plurality of plate-shaped members, and hinges are provided under each plate-shaped member, and each plate-shaped member holds a hinge. It is configured to rotate around the center and open outward.

The stanchion 40 includes a rod-shaped member 41, an upper member 42 connecting one end of the main rope 30, an intermediate member 43 that fits with the upper end of the fan 25, and a lower member 44 having a surface adjacent to the lower side of the loading platform 21. Consists of including.

The rod-shaped member 41 is provided with an upper member 42 connected to a hook or the like provided at one end of the main rope 30 such as a hook hook at the upper end portion, and the lower end thereof comes into contact with the ground 20. For example, an iron plate or the like is laid on the ground 20. Hereinafter, the master rope 30 will be described as having a hook as a connecting means, and the upper member 42 will be described as having a hook hook as a connecting portion, but the present invention is not limited thereto.

The intermediate member 43 is provided below the upper member 42 of the rod-shaped member 41 extending in the vertical direction, and suppresses the movement of the rod-shaped member 41 in the vertical direction and the movement of the fan 25 in the opening direction. That is, in FIG. 3, movement in the y-axis direction and the z-axis direction is suppressed.

The lower member 44 is provided below the intermediate member 43 of the rod-shaped member 41, and suppresses the rod-shaped member 41 from swinging in the extending direction of the main rope 30. That is, in FIG. 3, movement in the x-axis direction is suppressed.

The rod-shaped member 41, the upper member 42, the intermediate member 43, and the lower member 44 can all be made of a metal such as aluminum, carbon steel, or stainless steel. In addition, a cushioning material such as a rubber sheet is provided on the portion or surface that comes into contact with the fan 25 or the loading platform 21, to prevent the surface from being scratched, prevent the paint from peeling off, and improve the adhesion. Can be firmly fixed.

A specific structure will be described with reference to FIGS. 4 to 6. Since these are examples, the structure is not limited to these. 4A and 4B are views showing an example of the upper member 42, FIG. 4A is a plan view, FIG. 4B is a front view, and FIG. 4C is a side view. The upper member 42 is a rectangular tube 50 which is a hollow short tube through which a rod-shaped member 41 is inserted and has a rectangular cross section, and a substantially U-shape attached to two opposite side surfaces of the four side surfaces of the rectangular tube 50. Includes a hook hook 51, which is a metal fitting of the above. Further, the upper member 42 has a hole 50a at substantially the center of one of the side surfaces other than the two side surfaces to which the hook hook 51 is attached, and the nut 52 attached by continuous welding or the like to the hole 50a. Including.

A bolt 53 is screwed into the nut 52, and the tip of the bolt 53 abuts on the side surface of the rod-shaped member 41 so that the bolt 53 can be fixed to the rod-shaped member 41, and the tip of the bolt 53 is separated from the side surface of the rod-shaped member 41. As a result, the rod-shaped member 41 can be moved in the length direction. The nut 52 and the bolt 53 function as fixing means for fixing the upper member 42 to the rod-shaped member 41.

In the example shown in FIG. 4A, a rectangular tube 50 is used, but the present invention is not limited to this, such as a hollow circular tube having a circular cross section, a hollow circular tube having an elliptical cross section, and the like. It may be. Further, the tip of the bolt 53 may have a surface recessed in an arc shape according to the curvature of the side surface of the rod-shaped member 41, or may be recessed in an arc shape in accordance with the curvature of the side surface of the rod-shaped member 41, and the bolt 53 A contact member having a surface larger than that of the tip of the head may be attached. As a result, the rod-shaped member 41 can be brought into close contact with the side surface and can be fixed more firmly.

Further, in the example shown in FIG. 4A, a hole 50a is provided in the rectangular pipe 50, and a nut 52 is continuously attached to the hole 50a by welding or the like, but the present invention is not limited to this, and the hole is not limited to this. The inner surface of the 50a may be threaded and the bolt 53 may be screwed into the threaded hole.

5A and 5B are views showing an example of the intermediate member 43, FIG. 5A is a plan view, FIG. 5B is a front view, and FIG. 5C is a side view. The intermediate member 43 has a hollow rectangular tube 60 through which a rod-shaped member 41 is inserted and a rectangular cross section, and two opposite side surfaces of the rectangular tube 60 and two adjacent side surfaces, and the two side surfaces are the rod-shaped member 41. A U-shaped first member 61 extending in the direction perpendicular to the longitudinal direction of the above, and a U-shaped second member extending vertically from the first member 61 welded in contact with the tip of the first member 61. Includes 62 and.

The intermediate member 43 has an upper end of the fan 25 between one side surface 60a of the rectangular tube 60 and a surface 62a that is separated from the side surface 60a and extends parallel to the longitudinal direction of the rod-shaped member 41 of the second member 62 that faces the intermediate member 43. The side surface 60a and the surface 62a are configured to be adjacent to both sides of the fan 25, and the lower side of the first member 61 elongated to one side is adjacent to the upper end of the fan 25.

Insertion of the first member 61 into the rectangular tube 60 so that the portions 61a and 61b extending in the direction perpendicular to the longitudinal direction of the rod-shaped member 41 can be inserted so that the portions 61a and 61b can move in the extending direction. Ports 60b and 60c are provided. The insertion ports 60b and 60c are attached between the rectangular tube 60 and the flat plate by, for example, welding a bent flat plate having a rectangular opening through which the rod-shaped member 41 passes to one end and the side surface of the rectangular tube 60. Can be formed. Since this is an example, the method is not limited to this method.

The first member 61 is provided with a hole 61c at substantially the center of a side surface other than the two long side surfaces extending to one side, and a nut 63 is continuously attached to the hole 61c by welding or the like.

A bolt 64 is screwed into the nut 63, and the tip of the bolt 64 abuts on one side surface 60d of the rectangular pipe 60, so that the distance between the rectangular pipe 60 and the second member 62 can be changed. As a result, the rectangular tube 60 and the second member 62 can be adjacent to both sides of the fan 25, the fan 25 can be sandwiched between the rectangular tube 60 and the second member 62, and the intermediate member 43 can be fixed to the fan 25. The bolt 64 functions as a fixing means for fixing the intermediate member 43 to the fan 25.

Further, the rectangular pipe 60 on the same side as the side where the hole 61c of the first member 61 is provided is provided with a hole 60e on the lower side of the first member 61, and the nut 65 is continuously welded to the hole 60e or the like. Is installed. A bolt 66 is screwed into the nut 65, and the tip of the bolt 66 abuts on the side surface of the rod-shaped member 41 so that the intermediate member 43 can be fixed to the rod-shaped member 41, and the tip of the bolt 66 is attached to the rod-shaped member 41. By separating it from the side surface, the rod-shaped member 41 can be moved in the length direction.

In the example shown in FIG. 5A, a rectangular tube 60 is used, but the present invention is not limited to this, such as a hollow circular tube having a circular cross section, a hollow circular tube having an elliptical cross section, and the like. It may be. Further, the tip of the bolt 66 may have a surface recessed in an arc shape according to the curvature of the side surface of the rod-shaped member 41, or may be recessed in an arc shape in accordance with the curvature of the side surface of the rod-shaped member 41, and the bolt 66 A contact member having a surface larger than that of the tip of the head may be attached. As a result, the rod-shaped member 41 can be brought into close contact with the side surface and can be fixed more firmly. The bolt 64 may also be equipped with a contact member having a surface larger than the surface at the tip of the bolt 64. As a result, it can be brought into close contact with one side surface 60d of the rectangular tube 60 and can be fixed more firmly.

Further, in the example shown in FIG. 5A, the rectangular tube 60 and the first member 61 are provided with holes 60e and holes 61c, and the nuts 65 and 63 are continuously attached to the holes 60e and holes 61c. , Not limited to this. For example, the inner surface of the hole 60e or the hole 61c may be threaded, and the bolt 66 or the bolt 64 may be screwed into the threaded hole 60e or the hole 61c. Further, the second member 62 is not limited to the U-shaped member, but may be a plate-shaped member, a T-shaped member, or the like.

In the example shown in FIG. 5C, a taper is formed toward the lower end of the second member 62 and has a tapered shape, but the tapered shape does not have to be formed.

6A and 6B are views showing an example of the lower member 44, FIG. 6A is a plan view, FIG. 6B is a front view, and FIG. 6C is a side view. The lower member 44 includes a hollow rectangular tube 70 into which a rod-shaped member 41 is inserted and a rectangular cross section, and an L-shaped anti-sway member 71 joined to one of the four side surfaces of the rectangular tube 70. ..

The rectangular pipe 70 is provided with a hole 70a at substantially the center of one of the four side surfaces, and a nut 72 is continuously attached to the hole 70a by welding or the like.

A bolt 73 is screwed into the nut 72, and the tip of the bolt 73 abuts on the side surface of the rod-shaped member 41 so that the bolt 73 can be fixed to the rod-shaped member 41, and the tip of the bolt 73 is separated from the side surface of the rod-shaped member 41. As a result, the rod-shaped member 41 can be moved in the length direction. The nut 72 and the bolt 73 function as fixing means for fixing the lower member 44 to the rod-shaped member 41.

The anti-sway member 71 has a surface 71a adjacent to the lower side of the loading platform 21. The surface 71a has a constant width in order to reduce the shaking of the stanchion 10, and is made larger than, for example, the width of one side surface of the rectangular tube 70. Further, in order to ensure that the surface 71a is adjacent to the lower side of the loading platform 21, the projecting length in the direction perpendicular to one side surface of the rectangular tube 70 is set to a certain length or more.

In the example shown in FIG. 6A, a rectangular tube 70 is used, but the present invention is not limited to this, such as a hollow circular tube having a circular cross section, a hollow circular tube having an elliptical cross section, and the like. It may be. Further, the tip of the bolt 73 may have a surface recessed in an arc shape according to the curvature of the side surface of the rod-shaped member 41, or may be recessed in an arc shape according to the curvature of the side surface of the rod-shaped member 41, and the bolt 73 A contact member having a surface larger than that of the tip of the head may be attached. As a result, the rod-shaped member 41 can be brought into close contact with the side surface and can be fixed more firmly. The corners of the surface 71a are chamfered, but the present invention is not limited to this, and the corners may not be chamfered.

A method of fixing the stanchion 40 will be described with reference to FIGS. 7 and 8. 7 and 8 are views of the track 22 cut in the y-axis direction, which is the width direction thereof. A loading platform 21 is provided on the upper side of the wheel 23, and a fan 25 is provided on the outer edge of the loading platform 21.

The stanchion 40 is composed of a rod-shaped member 41, an upper member 42, an intermediate member 43, and a lower member 44, and stands along the outer surface of the fan 25 so that the lower end of the rod-shaped member 41 is in contact with the ground 20. Is placed.

First, a bolt 64 opens between the rectangular pipe 60 of the intermediate member 43 and the second member 62. The bolt 66 is loosened, the intermediate member 43 is moved in the length direction of the rod-shaped member 41, and the upper end of the fan 25 is inserted between them. When the upper end of the fan 25 comes into contact with the first member 61, the bolt 66 is tightened to fix the rectangular tube 60 at that position. Further, the bolt 64 is tightened, and the fan 25 is brought into close contact with the rectangular pipe 60 and the second member 62, and is fixed by sandwiching them. As a result, the movement of the track 22 in the width direction, that is, in the y-axis direction is suppressed.

Next, the bolt 73 of the lower member 44 is loosened, and the lower member 44 is moved in the length direction of the rod-shaped member 41. The surface 71a of the anti-sway member 71 of the lower member 44 is brought into contact with the lower side of the loading platform 21 and the surface 71a is fixed at the height position by tightening the bolt 73. As a result, the movement of the truck 22 shown in FIG. 8 in the front-rear direction, that is, in the x-axis direction is suppressed, shaking is prevented, and the rod-shaped member 41 is fixed.

As shown in FIG. 8, the intermediate member 43 (for example, the intermediate position 80 between the bolt 64 and the bolt 66, the bolt 66, etc.) serves as a fulcrum and tries to rotate around this, but the loading platform 21 is on the surface 71a of the lower member 44. Since it holds down the lower side, it cannot rotate and the shaking is suppressed. Therefore, shaking can be suppressed without separately attaching a brace or the like.

Then, the hook provided at one end of the main rope 30 is hooked on the hook hook 51 of the upper member 42, the bolt 53 is loosened, the upper member 42 is moved in the length direction of the rod-shaped member 41, and the height of the main rope 30 is increased. To adjust. After the adjustment, the bolt 53 is tightened to fix the upper member 42 at that position of the rod-shaped member 41. The hook of the main rope 30 may be hooked after adjusting the height of the upper member 42 first.

FIG. 9 is a diagram showing a usage example of the fall prevention device. FIG. 9 is also a view in which the track 22 is cut in the y-axis direction, which is the width direction thereof, as in FIGS. 7 and 8. The building material 90 is placed on the loading platform 21 of the truck 22, and the worker 91 is working on the building material 90.

The worker 91 wears a safety belt 92 on his waist and hooks a lifeline (lanyard) 93 with a hook of the safety belt 92 on the main rope 30. When the worker 91 moves in the front-rear direction of the truck 22, the lanyard 93 moves without doing anything, only by moving itself, so that the worker 91 can prevent the truck from falling.

FIG. 10 is a diagram showing another configuration example of the stanchion 40. As shown in FIG. 3, the stanchion 40 includes a rod-shaped member 41, an upper member 42, an intermediate member 43, and a lower member 44, and in the example shown in FIG. 10, a base for further fixing the lower end of the rod-shaped member 41. Includes member 45. Since the rod-shaped member 41 and the like have already been described, only the base member 45 will be described here.

The base member 45 is composed of a hollow tubular body 100 into which the lower end portion of the rod-shaped member 41 is inserted, and a plate member (plate) 101 having a surface adjacent to the ground 20 at which one end of the tubular body 100 is welded or the like. Weld. The base member 45 is also made of a metal such as aluminum, carbon steel, or stainless steel similar to the rod-shaped member 41 or the like. The inner diameter of the tubular body 100 is a diameter into which the rod-shaped member 41 can be inserted, and is the same as or slightly larger than the outer diameter of the rod-shaped member 41. The plate 101 may be rectangular, circular or elliptical. The size of the plate 101 may be any size as long as the rod-shaped member 41 can be fixed to the ground 20.

From the above, the stanchion 40 can be attached to any size of the truck 22 having the fan 25. General-purpose products are used for the rod-shaped member 41 and the base member 45, and the upper member 42, the intermediate member 43, and the lower member 44 are dedicated mounting members, but they are provided at low cost because they have a relatively simple structure. can do.

Since a general-purpose single pipe can be used as the rod-shaped member 41, a single pipe that can be found at any construction site can be substituted by preparing only a dedicated mounting member. Further, by changing the length of the single pipe, it is possible to cope with various heights of the loading platform 21. Since the dedicated mounting member is compact, it does not have to be stored and does not take up space even when it is mounted on the truck 22.

Further, since it can be firmly fixed by the intermediate member 43 and the lower member 44, it has sufficient strength even if there is no diagonal member or the like, and the rod-shaped member 41 is arranged in contact with the ground 20, so that the stanchion The load applied to the 40 is applied to the ground 20 instead of the fan 25, and damage to the fan 25 can be prevented.

When the stanchion 40 is fixed to, for example, the side fan 25, it prevents the side fan 25 from opening, so that even if the rear fan 25 is open, it can be prevented from wobbling. Further, since it can be installed in any place where there is a fan 25, it can be easily installed even on the rear side of the rear wheel of the truck 22.

Although the method of the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the above-described embodiments, and other embodiments, additions, modifications, and the like. It can be changed within the range that can be conceived by those skilled in the art, such as deletion, and is included in the scope of the present invention as long as the action and effect of the present invention are exhibited in any of the embodiments.

10 ... stanchion 11 ... pole 12 ... hook hook 13 ... plate 20 ... ground 21 ... loading platform 22 ... truck 23 ... wheel 24 ... cabin 25 ... fanning 30 ... master nut 40 ... stanchion 41 ... rod-shaped member 42 ... upper member 43 ... intermediate member 44 ... Lower member 45 ... Base member 50 ... Rectangular tube 50a ... Hole 51 ... Hook hook 52 ... Nut 53 ... Bolt 60 ... Rectangular tube 60a, 60d ... Side surface 60b, 60c ... Insertion port 60e ... Hole 61 ... First member 61a, 61b ... Part 61c ... Hole 62 ... Second member 62a ... Surface 63 ... Nut 64 ... Bolt 65 ... Nut 66 ... Bolt 70 ... Rectangular pipe 70a ... Hole 71 ... Anti-sway member 71a ... Surface 72 ... Nut 73 ... Bolt 80 ... Intermediate Position 90 ... Building material 91 ... Worker 92 ... Safety belt 93 ... Lanyard 100 ... Cylinder 101 ... Plate

Claims (6)

A prop used to erection a rope,
A rod-shaped member that extends vertically along the outer surface of the plate-shaped member of a vehicle having a loading platform and an enclosure around the loading platform composed of a plurality of plate-shaped members, and whose lower end is arranged in contact with the ground.
An upper member provided on the rod-shaped member and connecting one end of the rope,
An intermediate member provided on the rod-shaped member, sandwiching the upper end portion of the plate-shaped member, and fixed to the plate-shaped member.
A strut comprising a lower member provided on the rod-shaped member and having a surface adjacent to the lower side of the loading platform. The upper member, the intermediate member, and the lower member are attached to a short pipe that surrounds the rod-shaped member so as to be movable in the longitudinal direction of the rod-shaped member, and a predetermined shape in the longitudinal direction. Each includes a fixing means for fixing in the position of
The upper member is fixed according to the height of the rope to be erected, the intermediate member is fixed according to the height of the upper end of the plate-shaped member, and the lower member is fixed according to the height of the loading platform. The strut according to claim 1, wherein the position is adjusted. The support according to claim 2, wherein the upper member has a locking portion for locking a locking claw provided at one end of the rope. The intermediate member
The first member extending in the direction perpendicular to the rod-shaped member and
A second member arranged at the tip portion of the first member extending in the vertical direction and extending parallel to the longitudinal direction of the rod-shaped member is included.
The support column according to claim 2 or 3, wherein the upper end portion of the plate-shaped member is inserted between the short pipe and the second member. Any one of claims 1 to 4, including a base member including a tubular body into which the lower end of the rod-shaped member is inserted and a plate member connected to one end of the tubular body and having a surface adjacent to the ground. The strut according to item 1. A fall prevention device including the support column according to any one of claims 1 to 5 and a rope erected on the support column.