JPH0840682A - Guardrail suspender - Google Patents

Abstract

PURPOSE:To surely retain and suspend a guardrail and safely position it at a predetermined position even when refuse, oil, rain water or the like are attached to the guardrail and a suspender and remove a vacuum pump for the suspender itself and electric power and magnetic power generating means for the vacuum pump and realize simplification and an inexpensive running cost. CONSTITUTION:A movable arm 4 having a claw 5 to butt against and be engaged with the other side edge 92 of a guardrail 9 is connected to the other end portion 13 of a base arm 1 whose one end portion 11 possesses a claw 2 to butt against and be engaged with the one side edge 91 of the guardrail 9, and the connection of a suspension arm 7 is made turnably. A linking mechanism 8 to make the movable arm 4 conduct linking and turning in regard to the turning of the arm 7 is provided so that the claw 5 on the movable arm 4 may take a retreat position Q1 from the guardrail 9 or an engagement position with the guardrail 9 according to the position P1 of the suspension arm 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guardrail suspender, and more particularly, when installing a guardrail on a road, when the guardrail is attached to a guardrail post that is erected in advance along the road by bolting or the like. The present invention relates to a guardrail hoisting tool used for hoisting a vehicle from a state in which it is placed at a predetermined position such as a transport vehicle and positioning it along with a support, which is mounted on a guardrail hoisting movement device and used.

[0002]

2. Description of the Related Art The work of mounting a guardrail by bolting it to a guardrail column that is erected along the road is
Normally, a vehicle equipped with a guardrail hoisting and moving device is run to a guardrail installation position where the guardrails are stacked flatly and supported, and then the guardrails on the vehicle are hoisted by the hoisting device of the hoisting and moving device and positioned along the columns. It is done by doing.

As the guardrail suspensions used at this time, there are known ones that hold the guardrail by vacuum suction and ones that hold it by using a magnet.

[0004]

However, in any of the vacuum suction type hanging device and the magnet type hanging device, dust and oil are attached to the attracted and held surface of the guard rail and / or the attracted and held surface of the hanging device. If rainwater or the like is attached and dirty, the suction holding force may be reduced, or even if it can be sucked, it may slip, making it difficult to achieve its original purpose, and there is a risk of falling the guardrail. Also, in order to solve such a problem, when wiping off dirt, oil, rainwater, etc. with a waste cloth, etc.
There is a problem that extra effort and time are required to install the guardrail.

In addition, since the vacuum suction type suspender requires a vacuum pump and its driving power, it requires a large amount of power and costs much. Even in the case of a magnet type hanging device, a means for generating a magnetic force is required. Therefore, the present invention, even when dust, oil, rainwater, etc. are attached to the guardrail or the hanging device and are slightly dirty, the guardrail can be reliably held and lifted as it is, and can be safely positioned at a predetermined position. Also a vacuum pump for the hanger itself,
An object of the present invention is to provide a guardrail suspender that does not require electric power and magnetic force generating means for that purpose, is simplified, and has a low running cost.

[0006]

The guardrail suspension of the present invention for solving the above-mentioned problems is a base arm having a first claw at one end for abuttingly engaging one side edge of the guardrail arranged at a predetermined position. And a movable arm rotatably connected to the other end of the base arm and having a second claw that abuts and engages with the other side edge of the guard rail, and the movable arm rotates to the other end of the base arm. A lifting arm that is operably connected and can take a guard rail hoisting preparation position or a guard rail hoisting position with respect to the base arm; and a second arm of the movable arm when the hoisting arm is placed in the guard rail hoisting position. When the pawl takes the engagement position with the guardrail and the lifting arm is placed in the guardrail lifting preparation position, the second
Is provided with an interlocking mechanism that interlocks the movable arm with the pivoting of the lifting arm so that the pawl takes a position retracted from the engagement position with the guard rail.

The interlocking mechanism interlocks the movable arm with the rotation of the lifting arm so that the second claw of the movable arm is engaged with the guard rail to be lifted together with the first claw on the base arm. There is no particular limitation as long as it can be placed at an engagement position with respect to the guard rail where the guard rail can be clamped or a position retracted from the engagement position, and various link mechanisms by combining levers, arms, rods, etc. A link mechanism incorporating a piston cylinder device, a mechanism utilizing a gear transmission mechanism, and the like are conceivable.

From the viewpoint of the simplification of the structure and the reduction of the manufacturing cost,
For example, the movable arm may be provided with the second claw at one end thereof, and the interlocking mechanism may be provided with one end of the lifting arm so as to rotate about the same rotation center line as the lifting arm. It is conceivable that it includes an intermediate arm that is connected and fixed, and a connecting portion that is rotatably connected to the other end of the intermediate arm and the other end of the movable arm to connect the arms.

In this case, in order to appropriately set the rotatable range of the movable arm in accordance with the size of the guardrail, at least one of the intermediate arm and the connecting portion, for example, the connecting portion may be adjustable in length. Good. In order to ensure that the guard rails can be lifted one by one, when the base arm is placed at a position for preparing the hoisting with respect to the guard rail, the base arm is brought into contact with the surface of the guard rail to prepare for hoisting one guard rail. A positioning member that determines the positions of the first and second claws may be provided on the base arm. In this case, it is conceivable that the positioning member is capable of adjusting the protrusion amount so as to cope with changes in the shape, size, etc. of the lifting target guardrail.

Further, the base arm may be formed so as to be extendable and contractable so that the lifting operation can be performed even if the width dimension of the guard rail to be lifted is changed, so that the length of the base arm can be adjusted in a direction connecting both ends thereof. In addition, when the guardrail to be lifted is mounted on a guardrail carrier vehicle, etc., even if the side of the guardrail that faces the vehicle traveling on the road is facing upward, it is also facing downward. However, in order that the claw on the base arm and the claw on the movable arm can be engaged with the side edge of the guardrail, an appropriate shape depending on the mounting state of the guardrail,
The first claw may be exchangeable with the base arm and the second claw may be exchangeable with the movable arm so that the claws of the orientation and the like can be used.

Further, for safety, a lock device may be provided for locking the movable arm at the position where the second claw on the movable arm is in the engagement position with the guard rail.

[0012]

The lifting device of the present invention is mounted, for example, by connecting the lifting arm directly or via another member to the operation end of the guardrail lifting and moving device that is preliminarily mounted on the guardrail carrier vehicle. Under the operation of the moving device, the moving device is conveyed onto a guardrail arranged at a predetermined position of the vehicle or the like. Here, the first claw of the base arm is brought into abutting engagement with one side edge of the uppermost one guard rail, and the entire base arm is arranged on the guard rail in a direction transverse to the longitudinal direction of the guard rail. ,and,
The hoisting arm is placed at the guard rail hoisting preparation position with respect to the base arm. In this state, the second claw on the movable arm is in the retracted position.

Next, when the guardrail hoisting and moving device starts hoisting the hoisting device of the present invention, the hoisting arm of the hoisting device rotates relative to the base arm and takes the guardrail hoisting position. Along with that, the movable arm is interlockedly rotated by the action of the interlocking mechanism, the second claw on the movable arm is pivoted from the retracted position to take the engagement position with the guard rail, and is brought into contact with the other side edge of the guard rail. Then, the guardrail is clamped together with the first claw on the base arm.

Thus, the guardrail has the first edges on both sides thereof.
And is lifted in a state of being sandwiched between the second claws, conveyed to a guardrail support pillar standing upright along the road, and positioned on the support pillar. Further, during the suspension of the guard rail in this manner, the gravity of the guard rail and the suspension itself continues to work to further rotate the lifting arm with respect to the base arm, whereby the first and second claws are clamped. It is securely held by the action of the interlocking mechanism and does not loosen.

When the guardrail is attached to the support column, the lifting arm is lowered to return and rotate to the guardrail lifting preparation position, whereby the second claw on the movable arm is rotated to the retracted position. The two pawls can then be removed from the guardrail. When the base arm is provided with the positioning member for hoisting the guard rails one by one, when the base arm is arranged at a position for the hoisting preparation with respect to the guard rail, the positioning member abuts on the surface of the guard rail. As a result, the positions of the first and second claws for surely lifting one guard rail can be determined, and the guard rails can be reliably lifted one by one.

When the base arm is extendable / contractible so that the length thereof can be adjusted in the direction of connecting both ends thereof, even if the width of the lifting target guard rail is changed, it is sufficient to adjust the length. Further, when the first and second claws are replaceably provided as described above, the current claws remain as they are depending on which side of the guardrail to be lifted is arranged facing upward. Alternatively, the guard rail may be lifted by exchanging it with a claw having an appropriate shape or orientation.

Further, when a lock device for locking the movable arm at the guardrail engaging position of the second pawl is provided, the first and second pawls hold the guardrail. It is sufficient to operate this locking device while the robot is in a safe condition, and to safely lift the guardrail.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a guardrail suspension A as one embodiment, FIG. 2 is a front view of the suspension A, and FIG. 3 is a sectional view taken along line XX of FIG. FIG. 4 is a side view showing a state where the guardrail is clamped by the suspender of FIG. 1. 5 to 7 are views for explaining the usage state of the hanging device.

The illustrated guardrail suspension A includes a hollow cylindrical base arm 1. Base arm 1
The claw support arms 12 and 12 that extend to the right and left at right angles to the arm and are bent forward are fixed to one end 11 of each of the first claws 2 at the bending free end 121 of each claw support arm 12. Is supported. Each first claw 2 includes a recessed groove 21 that can be brought into abutting engagement with one side edge 91 of the guard rail 9 to be lifted.

Further, a bolt support member 31 is erected on each claw support arm 12 substantially in parallel with the longitudinal direction of the base arm 1, and a bolt 3 is screwed from the front side (the side where the claw 2 is present) to this. It is matched. The bolt 3 projects substantially at right angles to the longitudinal direction of the base arm 1 and can be rotated to adjust the amount of projection. Reference numeral 30 in the drawing denotes a bolt rotation preventing nut screwed onto the bolt 3.

A movable arm 4 is rotatably connected to the other end 13 of the base arm 1. The movable arm 4 includes a pair of parallel plate-shaped rods 40, 40 having the same length and a pair of support members 41, 41 extending from the other end 13 of the base arm 1 in the longitudinal direction of the arm 1. It is arranged between them and is rotatably connected to and supported by the member by a shaft 42.

The movable arm 4 supports the second claw 5 at its one end portion 43 projecting to the front side of the base arm 1.
The claw 5 is the other side edge 92 of the guardrail 9 that is going to be lifted.
Has a concave groove 51 that can be abutted and engaged with. A bolt 6 is screwed into the other end 13 of the base arm 1 from the front side (the side where the claw 51 is located). The bolt 6 is the bolt 3
Similarly to the above, the amount of protrusion can be adjusted by protruding the base arm 1 substantially at right angles to the longitudinal direction and rotating the base arm 1.

The bolts 3 provided on the base arm 1
When the base arm 1 is placed in a position for guard rail hoisting preparation as in the positional relationship with the guard rail 9 shown in FIG. 1, the first pawls 2, 2 and In order that the second claw 5 can just engage with the side edges 91 and 92 of the uppermost one guard rail 9 among the stacked guard rails 9,
It is used as a positioning member that abuts the surface 90 of the guardrail 9 for positioning the claws.

Further, one end 71 of the lifting arm 7 is rotatably connected to the other end 13 of the base arm 1. The arm 7 is arranged between the pair of support members 73, 73 extending rearward at the other end 13 of the base arm 1 and is rotatably connected to the member by a shaft 731. The hoisting arm 7 includes a pair of parallel plate-shaped rods 70, 70 having the same length, and one end of each rod 70, 70 has a large-diameter shaft portion 7 as shown in an enlarged view in FIG.
The one end portion 71 of the arm 7 is formed by connecting and fixing with 11 and the other end portions of the rods 70, 70 are connected to the shaft rod 721.
And the other end portion 72 of the arm 7 is formed. A shaft 731 that connects the arm 7 to the support member 73.
Penetrates the large-diameter shaft portion 711 of the arm one end portion 71.

The hoisting arm 7 can hoist the whole of the hoisting tool A by hoisting the hoisting arm 7 with a device described later. The one end 71 of the arm 7 has an interlocking mechanism 8
Is connected to the other end 44 of the movable arm 4 which does not support the claw 5. As shown in FIGS. 1 to 3, the interlocking mechanism 8 includes a pair of short intermediate arms 81 and 81 that are erected on the large-diameter shaft portion 711 that is fixed to the one end portion 71 of the lifting arm 7. Connecting part 8 for connecting the free end of the intermediate arm and the other end 44 of the movable arm 4
Includes 2 and.

The connecting portion 82, as shown in detail in FIG.
A spherical body 821 arranged between the free ends of the intermediate arms 81 and 81 and supported by them, and a case 822 fitted onto the spherical body and rotatable relative to the spherical body so as to project from the case 822. The internal threaded cylinder portion 823, the spherical rod 824 disposed between and supported by the plate-shaped rods 40, 40 constituting the movable arm 4, and the spherical body 824 externally fitted to the spherical body and relatively to the spherical body. The case 82 includes a case 825 that can freely rotate, and a bolt 826 protruding from the case 825.
6 is screwed into the female screw cylinder portion 823, and the entire length can be adjusted by adjusting the protruding amount of the bolt 826 from the cylinder portion 823. A locking nut 827 is screwed into the port 826.

The connecting portion 82 described above is of the same kind as the so-called rod end bearing structure sold under the name of joint ball or pillow ball from Asahi Seiko Co., Ltd. However, the connecting portion is not limited to this, and may be any one as long as it can exhibit the functions of the interlocking mechanism 8 to be described later. The lifting arm 7 can be rotated with respect to the base arm 1 to be arranged at the guard rail lifting preparation position P1 with respect to the base arm 1 as shown in FIG. 1, or as shown in FIG. 1 can be arranged at the guard rail hoisting position P2.

The interlocking mechanism 8 interlocks the movable arm 4 with the lifting arm 7 in the following manner. That is, as shown in FIG.
When placed in 1, the second arm on the movable arm 4 is interlocked with it.
When the arm 5 is placed in the retracted position Q1 where it can face the other side edge 92 of the guard rail 9 to be lifted and the arm 7 is placed in the guard rail lifted position P2 as shown in FIG. The claw 5 on the movable arm is placed at an engagement position Q2 where it can be engaged with the other side edge 92 of the guard rail 9 to be lifted.

The hoisting tool A described above operates the guard rail hoisting and moving device B as shown in FIGS. 4, 5 and 6 by utilizing the shaft rod 721 at the end 72 of the hoisting arm 7. The end member 104 is rotatably connected and suspended. Device B is a self-propelled vehicle C in this example.
The above-mentioned lifting and moving device is already mounted on the cargo bed of No. 1 and is already known per se.

This device B has a device main body 101 which can be rotated around a vertical axis, a parallel link mechanism 102 whose one end is supported by the main body and can be moved up and down, and one end (upper end) which is supported by the parallel link mechanism 102. 1 includes an L-shaped arm 103 rotatable about a vertical axis and an operation end member 104 supported on the other end (lower end) of the arm 103.
The suspender A of the present invention is connected to 04 as described above.
The guardrail hoisting and moving device B to which the hoisting tool A is attached is not limited to the above. It is sufficient that the hanging tool A is attached and the guardrail can be lifted and moved to a predetermined position.

In this example, a guardrail mounting portion D is formed along one side of the loading platform of the vehicle C, and a plurality of guardrails 9 are provided between the loading rail and the loading platform so that the vehicle can travel safely. The guard rail surfaces 90, which should be directed to the vehicle traveling on the road, are stacked and placed in a posture in which both side edges 91 and 92 of the guard rail are directed downward without a gap being formed, in other words, facing upward.

When installing the guard rail, the vehicle is made to travel to the installation location, and the lifting device A is transported by the device B onto the stacked guard rail 9 as shown in FIGS. At this time, the lifting arm 7 is arranged in the free space opposite to the vehicle body. Here, when the operator operates the base arm 1 while holding it, the concave groove 21 of each first claw 2 is brought into contact with and engaged with one side edge 91 of the uppermost one guard rail 9. At this time, the positioning bolts 3, 3 and 6 contact the surface 90 of the guardrail 9.
Further, similarly to the case shown in FIG. 1, the lifting arm 7 is arranged at the lifting preparation position P1. Further, the arm 7 is moved to the position P1 so that the second claw 5 is placed at the retracted position Q1.

In this state, when the guardrail hoisting and moving device B starts hoisting the hoisting tool A, the hoisting arm 7 is lifted.
Rotates with respect to the base arm 1 to take the guard rail lifting position P2 (see FIG. 5). The interlocking mechanism 8 interlocks with the rotation of the arm 7 to take a position Q2 in which the claw 5 on the movable arm 4 engages with the side edge 92 of the guardrail 9,
The groove 51 of the claw engages with the side edge 92 of the guardrail 9.

Thus, both side edges 91, 9 of the guardrail 9 are
2 is lifted in a state of being clamped by claws 2, 2 and 5, and is conveyed to a guardrail support column 100 standing upright on the side of the road or in the median strip of the road, for example, as shown in FIG. And is fixed to the column by an operator. As shown in FIG. 7, the guardrail 9 can be positioned on the pillar 100 by arranging the suspender A in the space SP on the vehicle traveling side of the pillar 100 and the suspended guardrail 9 so that the pillar 100 can be vertically arranged in two stages. The guard rail 9 can also be attached. Further, since there is only one base arm 1, the work of attaching the guard rail 9 to the support column 100 can be performed with fewer obstacles.

While the guard rail 9 is suspended in the posture shown in FIG. 7, the guard rail 9 and the suspension A are suspended.
The gravitational force of itself continues to work to further rotate the lifting arm 7 with respect to the base arm 1, thereby causing the pawl 5 to move.
Is reliably held at the position Q2 by the action of the interlocking mechanism 8 and is not loosened, and the guardrail 9 as a whole continues to be reliably held by the claws 2, 2 and 5.

When the mounting of the guard rail 9 on the support column 100 is completed, the hoisting arm 7 is lowered and returned to the guard rail hoisting preparation position P1 to rotate.
The claw 5 can be removed from the guardrail 9, and the claws 2 and 2 can be removed to prepare for the next work. The present invention is not limited to the above embodiment, but can be implemented in various other modes. One of other embodiments will be described with reference to FIG.

Guardrail suspension A1 shown in FIG. 8 (A)
Has substantially the same structure and action as the hanger A shown in FIGS. 1 to 7, and the same parts are designated by the same reference numerals. In this suspending tool A1, a base arm 10 corresponding to the base arm 1 of the suspending tool A has a hollow tubular portion 15 and a portion 16 that can be inserted into and pulled out from the hollow base portion 15 in one form.
The tubular portion 15 is provided with the movable arm 4, the second pawl 5, the lifting arm 7, the interlocking mechanism 8, the positioning bolt 6 and the like at the end thereof. Further, the loading / unloading portion 16 has, at its end, the above-mentioned claw support arm 12, the first claw 2, and the positioning bolt 3.
And so on. Bolts 17 are screwed on the side surfaces of the tubular portion 15, and a plurality of bolt fitting holes 18 are formed in the inlet / outlet portion 16 along the direction line connecting both ends of the base arm 10 in correspondence with the bolts. is there. Therefore, the length of the entire base arm 10 in the guard rail width W direction is adjusted by appropriately inserting / extracting the insertion / removal portion 16 into / from the tubular portion 15, and then the bolt 17 is fitted into the bolt fitting hole 18 to obtain the length. Will be fixed. In this way, the length in the direction connecting the both ends of the base arm 10 can be adjusted according to the width W of the lifting target guard rail 9. The mechanism for locking the tubular portion 15 and the inlet / outlet portion 16 to each other is not limited to the bolt 17 and the bolt fitting hole 18.

The first claw 2 is screwed to the end 121 of the claw support arm 12 with a bolt 20 and can be removed and replaced. Further, the second claw 5 is screwed to the end portion 43 of the movable arm 4 by the bolt 50 and can be removed and replaced. In the example shown in FIG. 8A, the surface 90 of the lifting target guardrail 9 is directed toward the lifting tool A1, but the back surface 900 of the guardrail 9 is directed upward and is placed on the vehicle C or the like. 8B, the claws 2 and 5 are replaced and attached to the claws 200 and 500 for the claws 200 and 50, respectively.
The guard rail 9 can be lifted while being clamped at 0. The claws 200 and 500 are also screwed to the claw support arm 12 and the movable arm 4 with bolts 20 and 50.

Further, in the suspender A1, a lever L is arranged along the side surface of the cylindrical portion 15 of the base arm 10, and the lever L is rotatably supported on the portion 15 by a shaft 19, and the shaft 19 has a cylindrical shape. It extends into the portion 15 and supports the cam CM.
The lever L and the cam CM form a lock device R. That is, when the lever L is rotated in the clockwise direction CW in FIG. 8, the cam CM is disengaged from the movable arm 4, and the arm 4 can be rotated to retract the claw 5 or 500 to the retracted position Q1. When the lever L is turned in the opposite direction with 5 or 500 engaged with the guardrail side edge 92 as shown in FIG. 8, the cam CM abuts the movable arm 4 as shown in FIG. 5 or 500 is held at the engagement position Q2 with the side edge of the guardrail. In this state, the guard rail 9 can be safely lifted and moved.

[0040]

According to the present invention, even when dust, oil, rainwater, etc. are attached to the guard rail or the hoisting tool and are a little soiled, the guard rail can be surely held and hoisted, and safely placed at a predetermined position. Can be positioned,
Further, it is possible to provide a guardrail hanger which does not require a vacuum pump for the hanger itself and electric power and magnetic force generating means for the hanger, which is simplified and the running cost is low.

Further, according to the guardrail hoisting tool of the present invention, since the hoisting arm can be placed close to the stacked guardrail to be hoisted and moved, the hoisting arm can be mounted on the outer side having a free space, and can be mounted, for example, When the guardrails are supported along the side surface of the vehicle and stacked, the guardrail group can be brought closer to the vehicle body and supported, and thus the vehicle can safely carry and travel the guardrails.

Further, according to the suspender of the present invention, the guardrail can be attached to the guardrail from the surface side of the roadside, that is, the surface side of the guardrail directed toward the space in which the automobile runs, and can be lifted and positioned on the guardrail column. On the other hand, the guardrails can be positioned in the upper and lower two stages or a plurality of stages. Further, when the base arm is configured as one piece, since only one member crosses the suspended guardrail in the vertical direction, when the guardrail is attached to the column, the number of obstacles is reduced and the guardrail is attached to the column. Work becomes easy.

When the base arm is provided with a positioning member for hoisting the guardrails one by one, when the base arm is arranged at a position for preparing the hoisting of the guardrail, the positioning member contacts the surface of the guardrail. The positions of the first and second claws for contacting with each other and reliably lifting one guard rail are easily determined, and the guard rails can be reliably lifted one by one.

When the base arm is extensible so that the length can be adjusted in the direction connecting both ends thereof, even if the width of the guard rail to be lifted changes, it can be dealt with by adjusting the length. When the first and second claws are replaceable, depending on which surface of the guardrail to be lifted is arranged facing upward, the current claws remain unchanged or appropriate. The guardrail can be lifted up by exchanging it with a nail having a different shape and orientation.

Further, when a lock device for locking the movable arm at the guardrail engaging position of the second pawl is provided, the first and second pawls hold the guardrail. The lock device can be operated while the guard rail is being lifted to safely lift the guardrail.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a front view of the embodiment shown in FIG.

FIG. 3 is a sectional view taken along line XX shown in FIG.

FIG. 4 is a side view showing a state where the guardrail is clamped according to the embodiment shown in FIG.

FIG. 5 is a diagram showing a state in which the hanging equipment of the embodiment shown in FIG. 1 is hung by a guardrail hoisting movement device, and the guardrail is started to be hung by the hanging equipment.

FIG. 6 is an explanatory view of a state of use in which the suspender shown in FIG. 1 is shown together with a guardrail lifting and moving device.

FIG. 7 is a diagram showing a state in which a suspended guardrail is positioned on a guardrail column.

FIG. 8A is a side view of another embodiment of the present invention, and FIG. 8B is an explanatory view of an example in which the guardrail holding claws are replaced and used.

[Explanation of symbols]

A Guard rail suspension 1 Base arm 11 One end of arm 13 The other end of arm 2 First claw 21 Recessed groove of claw 3 Positioning bolt 4 Movable arm 5 Second claw 51 Recessed groove of claw 6 Positioning bolt 7 For lifting Arm 8 Interlocking mechanism 81 Intermediate arm 82 Connecting part P1 Guard rail lifting preparation position of lifting arm 7 P2 Guard rail lifting position of lifting arm 7 Q1 Retracting position of second pawl 5 from guard rail Q2 To guard rail of second pawl 5 9 Guardrail 91 Guardrail one side edge 92 Guardrail other side edge 90 Guardrail front surface 900 Guardrail back surface B Guardrail lifting and moving device 104 Operation end member of device B A1 Guardrail lifting device 10 Base arm 15 Cylindrical portion 16 Entry / exit portion 17 Bolt 18 DOO fitting hole 200 first pawl 20 nail fixing bolt 500 second pawl 50 nail fixing bolt R lock device L lever 19 lever pivot shafts CM cam

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location E01F 15/08

Claims (3)

[Claims] 1. A base arm having at one end a first claw for abuttingly engaging one side edge of a guard rail arranged at a predetermined position, and rotatably connected to the other end of the base arm, A movable arm having a second claw that abuts and engages with the other side edge of the guard rail, and is rotatably connected to the other end of the base arm,
A hoisting hoisting arm capable of taking a guard rail hoisting preparation position or a guard rail hoisting position with respect to the base arm, and a second claw of the movable arm to the guard rail when the hoisting arm is placed in the guard rail hoisting position. When the lifting arm is placed in the guardrail lifting preparation position in the engagement position, the second arm is moved by the rotation of the lifting arm so that the second claw takes a position retracted from the engagement position with the guardrail. A guardrail suspender equipped with an interlocking mechanism that interlocks the arms. 2. The movable arm includes the second arm at one end thereof.
The interlocking mechanism has an intermediate arm whose one end is connected and fixed to the lifting arm so as to rotate about the same rotation center line as the lifting arm, and the intermediate arm. 2. The guardrail hanger according to claim 1, further comprising a connecting portion that is rotatably connected to the other end of the movable arm and the other end of the movable arm to connect the arms. 3. When arranging the base arm with respect to a guard rail at a position for preparation for hoisting the guard arm, the base arm is brought into contact with the surface of the guard rail and the first and second claws for preparing for hoisting one guard rail are provided. A positioning member for determining a position is provided on the base arm.
Or, the guardrail suspension according to 2.