JP2019208792A - Fall prevention device from truck loading platform - Google Patents

Abstract

To provide a fall prevention device from a truck loading platform, the device that can safely support a strut even if a lower end of the strut is not stepped with a tire, and can bear the falling strength of a person, and also can prevent it from hitting the ground when falling.SOLUTION: A strut sheath tube 11 is provided in the center of a base plate 10 capable of exerting the load bearing ability just for preventing a strut 5 from falling. A lower end of the strut 5 provided with a horizontal arm 12 in the upper edge is fitted in the strut sheath tube 11, and is set up on the base plate 10. A safety block shock absorber 13 by a winding-type safety rope is provided at the tip of the arm 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fall prevention device from a truck bed.

  When loading and unloading work on the platform of a truck such as a truck, it is assumed that the worker will step on the platform or fall from the platform due to the poor footing on the platform. The For this reason, at the time of unloading work, a fall prevention device for preventing an operator from falling from the loading platform is used.

As shown in the following patent document, for example, this fall prevention device includes a strut that can be connected to, for example, a master rope connected to an operator, and has a support column that is erected on the outer side surface of a cargo bed.
JP 11-291863 A

  As shown in FIG. 10, the worker fall prevention equipment 4 includes a column 5 and a master rope 6. The two columns 5 are arranged in front and rear on one side of the track 3, The rope 6 is attached so as to have an appropriate tension between the tips of the respective columns 5.

  In addition, a flat plate 5e that is parallel to the ground is provided at the bottom end of the column 5. The support 5 is fixed by the front wheel 3a and the rear wheel 3b of the track 3 stepping on the flat plate 5e.

In addition, about the fixing method of the support | pillar 5, although there exists also in the following patent document, as shown in FIG. 11, the fixing device 8 for fixing to the upper end of the lift 7 of the loading platform 1 may be provided. In the illustrated example, the fixing device 8 is a vise or the like, and for safety, a wedge (strand) 9 is passed from the lower end of the anchor 7 to the middle of the column 5.
JP 2013-24428 A

  In the case of the type in which the support is attached to the tilt 7 of the track 3 as shown in FIG. 11, this depends on the strength of the tilt, and the height is not so high that it hits the ground when it actually falls. There is a risk that.

  Furthermore, there is a problem that the tilt 7 cannot be defeated.

  Further, as in Patent Document 1, in a type in which a tire is stepped on or is sandwiched between tires and a column is formed, it must be set at the tire position every time.

  In addition, as shown in FIG. 9, the height is not so high that it hits the ground when it actually falls. FIG. 10 does not stretch the master rope 6 by setting up two struts 5 as in Patent Document 1, but one of the master rope 6 is attached to the frame behind the driver's seat. The same applies to the case where the support 5 is attached so as to have an appropriate tension between the tips of the support columns 5, and there is a possibility of hitting the ground.

  When building a steel frame, etc., the parent company's temporary industry association has decided a standard called the “main rope support post” to prevent people from falling in a safety belt by attaching a master rope, and the post that cleared the certification standard test is official It will be a fall prevention master rope support for a normal person, but if the actual person falls, the master rope will stretch and the safety belt rope is also about 1.5m, so if the actual person falls, the person will hit the ground is the current situation.

  The object of the present invention is to eliminate the inconvenience of the conventional example, and can safely support the strut without stepping on the lower end of the strut with a tire and withstand the fall strength of a person. It is an object of the present invention to provide a device for preventing fall from a truck bed that can be prevented from hitting.

  In order to achieve the above-mentioned object, the present invention according to claim 1 is the lower end of a column provided with a column sheath tube at the center of a base plate capable of exhibiting a supporting force sufficient to prevent the column from falling down and having a horizontal arm at the upper end. Is fitted on the support sheath pipe and is erected on the base plate, and a safety block shock absorbing device using a retractable lifeline is provided at the tip of the arm.

  According to the first aspect of the present invention, the base plate is a heavy iron plate that can exhibit a supporting force that can prevent the column from falling over even if it is not stepped on with a tire, and has to be set at the tire position every time. In addition, since the tilt of the truck bed is not used, it is not affected by the strength of the cage, and there is no problem that the tilt cannot be defeated.

  Moreover, since it is supported by a horizontal arm at the top end of the support column, it can withstand the fall strength of people by using a height and using a safety block (self-locking) shock absorber so that it does not hit the ground. can do.

  If the truck bed is large or long, a plurality of trucks can be used.

  The gist of the present invention described in claim 2 is that the support column is inserted into the support column pipe so as to be rotatable, and is fixed by a support column fastening bolt.

  According to the second aspect of the present invention, a column having a horizontal arm at the upper end is lifted by a crane, the lower end is inserted into a column sheath tube, rotated as it is, and can be fixed by a column tightening bolt.

  The present invention according to claim 3 is characterized in that the arm is a truss frame assembly, and both corners of the bottom portion of the right triangle are rotatably engaged with the column by a ring body and fixed to the column with a rotation bolt. It is what.

  According to the third aspect of the present invention, when the arm is a frame structure of a truss structure, sufficient strength can be exhibited and stability with respect to the support column is also increased. Further, since the arm is rotatably engaged with the support column, the support direction can be freely selected by changing the direction of the arm from the support column.

  As described above, the fall prevention device from the truck bed according to the present invention can support the column safely without stepping on the lower end of the column with the tire, can withstand the fall strength of a person, and has fallen. The case will never hit the ground.

It is a front view which shows a use condition in one Embodiment of the fall prevention apparatus from the truck bed of this invention. It is a top view which shows a use condition in one Embodiment of the fall prevention apparatus from the truck bed of this invention. It is a front view of the support | pillar sheath part of the fall prevention apparatus from the truck bed of this invention. It is a front view which shows the support | pillar and arm of the fall prevention apparatus from the truck bed of this invention. FIG. 3 is a front view of a first step showing a method for installing a fall prevention device from a truck bed according to the present invention. It is a front view of the 2nd process which shows the installation method of the fall prevention device from the truck bed of the present invention. It is a front view of the 3rd process which shows the installation method of the fall prevention device from the truck bed of the present invention. It is a front view of the completion process which shows the installation method of the fall prevention apparatus from the truck bed of this invention. It is explanatory drawing of a prior art example. It is a front view which shows another prior art example. It is explanatory drawing at the time of attaching a support | pillar to a tilt in a prior art example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing a use state of an apparatus for preventing fall from a truck bed according to an embodiment of the present invention, FIG. 2 is a plan view of the same, and a base plate 10 capable of exhibiting a supporting force sufficient to prevent the column 5 from falling over The support plate 11 is provided on the base plate 10, the horizontal arm 12 is provided at the upper end of the support 5, and the safety block shock absorber 13 is provided by a retractable lifeline provided at the tip of the arm 12.

  The base plate 10 is made of a rectangular steel plate of about 3 m × 1.5 m, and can exhibit a supporting force sufficient to prevent the column 5 from falling over without being stepped on with a tire as a heavy iron plate.

  The column sheath tube 11 is a cylindrical body that receives the lower end of the column 5, has a bolt fixing flange 14 at the lower end, and is bolted to the edge of the long side at the center of the base plate 10.

  A vertical triangular flange perpendicular to the flange 14 is radially arranged on the outer peripheral side portion of the column sheath pipe 11 for reinforcement.

  Further, the column sheath tube 11 is provided with a column tightening bolt 16 for fixing the column 5.

  The arm 12 is a truss body framed by combining diagonal members. As shown in FIG. 4, as shown in FIG. 4, an engagement ring body 17 is provided at both corners of the bottom of the right triangle, and the column 5 is interposed via the ring body 17. To be rotatably engaged.

  On the other hand, the column 5 is provided with a rotation stopping bolt 18 to the ring body 17 of the arm 12.

  The safety block shock absorbing device 13 using a roll-up lifeline is obtained by winding a lifeline 13a made of a wire or a belt on a bobbin (not shown) rotatably provided in a case 13b. The bobbin is urged with a winding force in a direction to wind up the lifeline 13a by an elastic force of a winding spring (not shown) provided in the case 13b. The bobbin is provided with a rotatable fall prevention claw (not shown). The tip of the roll-up lifeline (lifeline 13a) is detachably locked to the operator.

About its own weight, is an example,
Arm 12 20kgf
Prop 5 52kgf
Prop Saya tube 11 18kgf
Base plate 10 785kgf
875kgf in total
It was.

  Next, an installation method will be described with reference to FIGS. First, as shown in FIG. 5, the support sheath pipe 11 is bolted to the base plate 10. Although the base plate 10 is laid on the ground under the truck bed, it is not always necessary to step on the wheels, but there is no problem even if it is stepped on.

  As shown in FIG. 6, the column 5 is lifted with an arm 12 by a crane such as a UNIC vehicle. In the figure, 19 is a wire for lifting, and 20 is a shackle to be engaged with a crane hook.

  As shown in FIG. 7, the lower end of the support column 5 is inserted into the support column tube 11, and the position is adjusted by turning as appropriate.

  When the crane is lowered along the wire 19 and removed from the wire 19, the installation is completed as shown in FIG.

  Next, the usage will be described. The tip of the lifeline 13a fed out from the safety block shock absorber 13 by the roll-up type lifeline when the worker performs the work of rearranging the load after being loaded on the loading platform 1. Works by attaching it to the body, for example, a safety belt.

  When it is likely to fall down from the load, the lifeline 13a is suddenly pulled out from the case 13b and the bobbin is suddenly rotated, and the fall-preventing claw is opened outward by the centrifugal force due to the sudden rotation. The opened fall prevention claw comes into contact with a stopper (not shown) provided in the case 13b. Thereby, rotation of the bobbin is blocked and further extension of the lifeline 13a is blocked, so that the operator can be prevented from falling.

1 Cargo 3 Truck (Vehicle)
3a Front wheel 3b Rear wheel 4 Worker fall prevention equipment 5 Strut 5e Flat plate 6 Parent rope 7 Anchor 8 Fixing device 9 Cage (Rope)
DESCRIPTION OF SYMBOLS 10 Base board 11 Support | pillar sheath pipe 12 Arm 13 Safety block shock absorber 13a Lifeline 13b Case 14 Flange
16 Strut Tightening Bolt 17 Ring Body 18 Rotation Stop Bolt 19 Wire 20 Shackle

  The present invention relates to a fall prevention device from a truck bed.

  When loading and unloading work on the platform of a truck such as a truck, it is assumed that the worker will step on the platform or fall from the platform due to the poor footing on the platform. The For this reason, at the time of unloading work, a fall prevention device for preventing an operator from falling from the loading platform is used.

As shown in the following patent document, for example, this fall prevention device includes a strut that can be connected to, for example, a master rope connected to an operator, and has a support column that is erected on the outer side surface of a cargo bed.
JP 11-291863 A

  As shown in FIG. 10, the worker fall prevention equipment 4 includes a column 5 and a master rope 6. The two columns 5 are arranged in front and rear on one side of the track 3, The rope 6 is attached so as to have an appropriate tension between the tips of the respective columns 5.

  In addition, a flat plate 5e that is parallel to the ground is provided at the bottom end of the column 5. The support 5 is fixed by the front wheel 3a and the rear wheel 3b of the track 3 stepping on the flat plate 5e.

In addition, about the fixing method of the support | pillar 5, although there exists also in the following patent document, as shown in FIG. 11, the fixing device 8 for fixing to the upper end of the lift 7 of the loading platform 1 may be provided. In the illustrated example, the fixing device 8 is a vise or the like, and for safety, a wedge (strand) 9 is passed from the lower end of the anchor 7 to the middle of the column 5.
JP 2013-24428 A

  In the case of the type in which the support is attached to the tilt 7 of the track 3 as shown in FIG. 11, this depends on the strength of the tilt, and the height is not so high that it hits the ground when it actually falls. There is a risk that.

  Furthermore, there is a problem that the tilt 7 cannot be defeated.

  Further, as in Patent Document 1, in a type in which a tire is stepped on or sandwiched between tires and a support is made, the tire must be set at the tire position every time.

  In addition, as shown in FIG. 9, the height is not so high that it hits the ground when it actually falls. FIG. 10 does not stretch the master rope 6 by setting up two struts 5 as in Patent Document 1, but one of the master rope 6 is attached to the frame behind the driver's seat. The same applies to the case where the support 5 is attached so as to have an appropriate tension between the tips of the support columns 5, and there is a possibility of hitting the ground.

  When building a steel frame, etc., the parent company's temporary industry association has decided a standard called the “main rope support post” to prevent people from falling in a safety belt by attaching a master rope, and the post that cleared the certification standard test is official It will be a fall prevention master rope support for a normal person, but if the actual person falls, the master rope will stretch and the safety belt rope is also about 1.5m, so if the actual person falls, the person will hit the ground is the current situation.

  The object of the present invention is to eliminate the inconvenience of the conventional example, and can safely support the strut without stepping on the lower end of the strut with a tire and withstand the fall strength of a person. It is an object of the present invention to provide a device for preventing fall from a truck bed that can be prevented from hitting.

In order to achieve the above-mentioned object, the present invention according to claim 1 is provided with a support shear tube in the center of a base plate capable of exhibiting a supporting force sufficient to prevent the support column from falling down, and the support shaft tightening for fixing the support column to the support sheath pipe. Bolts are installed, and the lower end of the column with a horizontal arm at the upper end is fitted into the column sheath tube, and the column is erected on the base plate. At the tip of the arm, a safety block shock absorber using a retractable lifeline is provided, the arm is a truss frame assembly, and both corners of the bottom of the right triangle are rotatably engaged with the column by a ring. The gist of the invention is that it is fixed to the column with a rotation-stop bolt, and one column is provided with a rotation-stop bolt for the arm ring .

  According to the first aspect of the present invention, the base plate is a heavy iron plate that can exhibit a supporting force that can prevent the column from falling over even if it is not stepped on with a tire, and has to be set at the tire position every time. In addition, since the tilt of the truck bed is not used, it is not affected by the strength of the cage, and there is no problem that the tilt cannot be defeated.

  Moreover, since it is supported by a horizontal arm at the top end of the support column, it can withstand the fall strength of people by using a height and using a safety block (self-locking) shock absorber so that it does not hit the ground. can do.

  If the truck bed is large or long, a plurality of trucks can be used.

Also, a column with a horizontal arm at the upper end can be lifted by a crane, the lower end can be inserted into a column sheath tube, rotated as it is, and can be rotated and fixed with a column clamping bolt.

Furthermore, by using a truss structure frame as the arm, sufficient strength can be exerted, and stability with respect to the support column is also increased. Further, since the arm is rotatably engaged with the support column, the support direction can be freely selected by changing the direction of the arm from the support column.

  As described above, the fall prevention device from the truck bed according to the present invention can support the column safely without stepping on the lower end of the column with the tire, can withstand the fall strength of a person, and has fallen. The case will never hit the ground.

It is a front view which shows a use condition in one Embodiment of the fall prevention apparatus from the truck bed of this invention. It is a top view which shows a use condition in one Embodiment of the fall prevention apparatus from the truck bed of this invention. It is a front view of the support | pillar sheath part of the fall prevention apparatus from the truck bed of this invention. It is a front view which shows the support | pillar and arm of the fall prevention apparatus from the truck bed of this invention. FIG. 3 is a front view of a first step showing a method for installing a fall prevention device from a truck bed according to the present invention. It is a front view of the 2nd process which shows the installation method of the fall prevention device from the truck bed of the present invention. It is a front view of the 3rd process which shows the installation method of the fall prevention device from the truck bed of the present invention. It is a front view of the completion process which shows the installation method of the fall prevention apparatus from the truck bed of this invention. It is explanatory drawing of a prior art example. It is a front view which shows another prior art example. It is explanatory drawing at the time of attaching a support | pillar to a tilt in a prior art example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing a use state of an embodiment of the apparatus for preventing fall from a truck bed according to the present invention. FIG. 2 is a plan view of the same, and a base plate 10 capable of exhibiting a supporting force sufficient to prevent the support column 5 from falling. The support plate 11 is provided on the base plate 10, the horizontal arm 12 is provided on the upper end of the support 5, and the safety block shock absorber 13 is provided by a retractable lifeline provided on the tip of the arm 12.

  The base plate 10 is made of a rectangular steel plate of about 3 m × 1.5 m, and can exhibit a supporting force sufficient to prevent the column 5 from falling over without being stepped on with a tire as a heavy iron plate.

  The column sheath tube 11 is a cylindrical body that receives the lower end of the column 5, has a bolt fixing flange 14 at the lower end, and is bolted to the edge of the long side at the center of the base plate 10.

  A vertical triangular flange perpendicular to the flange 14 is radially arranged on the outer peripheral side portion of the column sheath pipe 11 for reinforcement.

  Further, the column sheath tube 11 is provided with a column tightening bolt 16 for fixing the column 5.

  The arm 12 is a truss body framed by combining diagonal members. As shown in FIG. 4, as shown in FIG. 4, an engagement ring body 17 is provided at both corners of the bottom of the right triangle, and the column 5 is interposed via the ring body 17. To be rotatably engaged.

  On the other hand, the column 5 is provided with a rotation stopping bolt 18 to the ring body 17 of the arm 12.

  The safety block shock absorbing device 13 using a roll-up lifeline is obtained by winding a lifeline 13a made of a wire or a belt on a bobbin (not shown) rotatably provided in a case 13b. The bobbin is urged with a winding force in a direction to wind up the lifeline 13a by an elastic force of a winding spring (not shown) provided in the case 13b. The bobbin is provided with a rotatable fall prevention claw (not shown). The tip of the roll-up lifeline (lifeline 13a) is detachably locked to the operator.

About its own weight, is an example,
Arm 12 20kgf
Prop 5 52kgf
Prop Saya tube 11 18kgf
Base plate 10 785kgf
875kgf in total
It was.

  Next, an installation method will be described with reference to FIGS. First, as shown in FIG. 5, the support sheath pipe 11 is bolted to the base plate 10. Although the base plate 10 is laid on the ground under the truck bed, it is not always necessary to step on the wheels, but there is no problem even if it is stepped on.

  As shown in FIG. 6, the column 5 is lifted with an arm 12 by a crane such as a UNIC vehicle. In the figure, 19 is a wire for lifting, and 20 is a shackle to be engaged with a crane hook.

  As shown in FIG. 7, the lower end of the support column 5 is inserted into the support column tube 11, and the position is adjusted by turning as appropriate.

  When the crane is lowered along the wire 19 and removed from the wire 19, the installation is completed as shown in FIG.

  Next, the usage will be described. The tip of the lifeline 13a fed out from the safety block shock absorber 13 by the roll-up type lifeline when the worker performs the work of rearranging the load after being loaded on the loading platform 1. Works by attaching it to the body, for example, a safety belt.

  When it is likely to fall down from the load, the lifeline 13a is suddenly pulled out from the case 13b and the bobbin suddenly rotates, and the fall-preventing claw is opened to the outside by the centrifugal force due to the sudden rotation. The opened fall prevention claw comes into contact with a stopper (not shown) provided in the case 13b. Thereby, rotation of the bobbin is blocked and further extension of the lifeline 13a is blocked, so that the operator can be prevented from falling.

1 Cargo 3 Truck (Vehicle)
3a Front wheel 3b Rear wheel 4 Worker fall prevention equipment 5 Strut 5e Flat plate 6 Parent rope 7 Anchor 8 Fixing device 9 Cage (Rope)
DESCRIPTION OF SYMBOLS 10 Base board 11 Support | pillar sheath pipe 12 Arm 13 Safety block shock absorber 13a Lifeline 13b Case 14 Flange
16 Strut Tightening Bolt 17 Wheel 18 Rotation Stop Bolt 19 Wire 20 Shackle

Claims (3)

  Prop Saya tube is installed in the center of the base plate that can provide sufficient support to prevent the column from falling down, and the lower end of the post with a horizontal arm at the upper end is fitted into the post Saya tube to stand on the base plate A device for preventing a drop from a truck bed, which is provided with a safety block shock absorbing device by a retractable lifeline at the tip of the arm.   The fall prevention device from the truck bed according to claim 1, wherein the support column is rotatably inserted into the support column tube and fixed with a support column tightening bolt.   3. From the truck bed according to claim 1 or 2, wherein the arm is a truss frame assembly, and both corners of the bottom portion of the right triangle are rotatably engaged with the column by a ring and fixed to the column with a rotation stop bolt. Fall prevention device.

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