JPH06235271A - Concrete guard fence installing method and device thereof - Google Patents

Abstract

PURPOSE:To carry out construction in space reduction. CONSTITUTION:Tracks 11 and 11A are arranged on both sides sandwiching a median divider strip C being an installing position between them. Beams 12 and 12A are constructed between these tracks. Hoists 13 are installed on these beams 12 and 12A. After a guard fence 1 is hung up by these hoists 13, this guard fence 1 is moved in the road width direction, and is installed in the median divide strip C. In a fixed condition of being supported at their opposite ends, the beams 12 and 12A are hung up and are moved. Thereby, the comparatively heavy guard fence 1 can be installed while reducing space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete guard fence installation method and apparatus for installing a precast concrete guard fence along the length of a road.

[0002]

2. Description of the Related Art A guard fence is provided to prevent a vehicle deviating from a traveling lane from deviating to the outside of the road or to an oncoming lane, and must have a sufficient deviation preventing effect. In this respect, concrete guard fences are widely used for roads where vehicles run at high speed, such as highways, because strength and durability that are not generally obtained with steel can be obtained. Among them, in the precast concrete guard fence manufactured by the factory, it is possible to carry a factory product of a predetermined length to the site and install the carried product with a crane car etc. to construct a continuous guard fence in the length direction of the road. .

[0003]

In the above-mentioned prior art precast concrete guard fence, although excellent strength and durability can be obtained by factory production of concrete, the weight of the product is smaller than that of steel guard fence due to the concrete integral structure. There was a big side. In consideration of this point, it is possible to shorten the length dimension and reduce the weight of each product, but in this case, the number of products required for construction increases, resulting in a decrease in construction speed and an increase in construction cost. There is a problem of stripes. Therefore, in general, products are manufactured with a length dimension that considers both workability and construction cost and installed on site. For example, if the length dimension is about 3 meters, the product weight will be about 7 tons. The product weight is light and the workability is good. Compared with the conventional construction using cast-in-place concrete, the construction speed is improved, the construction cost is reduced, the quality and management are improved, and it is widely used especially on new roads. . By the way, when installing a precast concrete guard fence with excellent workability, etc., on the existing road, there are various restrictions on the installation work,
For example, on an expressway where it is difficult to stop all traffic due to construction, construction may be difficult in practice. FIG. 10 shows an example in which one lane a on one side is secured for vehicle traffic and the guard fence 1 is installed on the central separation zone C on a highway with two lanes A, a, B, b on one side. The crane vehicle 2 is arranged in the lane A near the belt C, and the lane A is closed to the vehicle.
The guard fence 1 must be hoisted and installed by the arm 3 of. When the crane vehicle 2 is used with one lane on one side secured so that the vehicle can pass through, the arm 3 of the crane vehicle 2 is horizontally swung in the direction of the median strip C during the installation work, as shown in the lower right side of the figure. As described above, there is a risk that the rear part of the turning body 4 of the crane vehicle 2 may protrude to the side of the traffic lane a to cause a contact accident with the vehicle, and the horizontal turning angle θ is limited. Therefore, in order to install the guard fence 1 on the median strip C at a small horizontal turning angle θ, the elevation angle of the arm 3 must be close to horizontal and the turning radius R must be large. However, if the elevation angle of the arm 3 is made small and the turning radius R is made large, the hoisting weight is reduced. For example, if the turning radius R is 16 meters with a 35-ton mobile crane, the hoistable weight is 1.65 tons. However, there is a problem that the guard fence 1 of this kind, which has a relatively large member weight, cannot be lifted. In addition, in this type of construction, in order to ensure safety during full-scale traffic, it may be necessary to remove all heavy equipment and construction materials from the road, including the median strip C, except during construction hours. If a self-propelled hoisting method such as 2 cannot be used, it will be difficult to perform construction. Furthermore, when using a mobile crane 2 having an arm 3 on an ordinary road, if there is an obstacle such as an electric wire in the upper space of the road, there is a risk that the arm 3 will come into contact with the obstacle during the hanging work. There is also a problem in that the elevation angle of the arm 3 cannot be increased to perform the hanging work.

In view of the above-mentioned drawbacks of the swing type crane truck, the present invention has an object to provide a method and an apparatus for installing a concrete guard fence which is space-saving and has excellent workability.

[0005]

The installation method according to claim 1 is
In the installation method of the concrete guard fence to install the precast concrete guard fence in the length direction of the road, on both sides sandwiching the installation position of the guard fence, with a movable support, and a beam between these supports. After being erected, the guard fence is hoisted by a hoisting device movable along the beam, and then the guard fence is moved in the road width direction and installed at the installation position.

The installation apparatus of claim 2 is a concrete guard fence installation apparatus for installing a precast concrete guard fence in a length direction of a road, and a movable support arranged on both sides of the installation position of the guard fence. It comprises a body, a beam installed between these supports, and a hoisting device movable along the beam and capable of hoisting the guard fence.

The installation method according to claim 3 is the installation method of a concrete guard fence in which a precast concrete guard fence is installed in the longitudinal direction of a road, wherein a movable support is arranged on one side of the installation position of the guard fence. Then, a beam is extended substantially horizontally from the support body to the installation position side, the midway of the beam is supported by a support member, and a guard fence is lifted by a lifting device movable along the beam, and then the guard fence is lifted. The fence is moved in the width direction of the road and installed at the installation position.

The installation apparatus of claim 4 is a concrete guard fence installation apparatus for installing a precast concrete guard fence in the length direction of a road, wherein the movable support is arranged at one side of the installation position of the guard fence. A body, a beam extending substantially horizontally from the support to the installation position side, and a support member supporting the middle of the beam,
A lifting device that is movable along the beam and that can lift the guard fence.

[0009]

With the above structure, the supports are arranged across the installation place, the beams are erected between the supports, the guard fence is hung by the hoisting device, the guard fence is moved to the installation position and the installation is performed. Since the guard fence is moved in the width direction of the road while both ends are supported and the beam is fixed in position, the relatively heavy guard fence can be lifted and moved without taking a space.

Further, according to the above-mentioned structure, the supports are arranged on one side of the installation place, the beams are extended from the supports to the installation position side, the midway of the beams is supported by the support member, and the guard fence is supported by the lifting device. In order to move the guard fence in the width direction of the road while hoisting and moving to the installation position and installing it, the beam is supported by the support and the supporting member and the beam is fixed in a substantially horizontal position. Even if there is an obstacle above, the guard fence can be lifted and moved.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show a first embodiment of the present invention, in which the same parts as those in FIG. 10 are designated by the same reference numerals and the description thereof will be omitted to explain in detail. FIG. 1 shows two lanes A, a, B on one side. b
FIG. 1 is a plan view of each of the highways, and the present invention shows that trucks 11 and 11 with cranes, which are support bodies, are provided in the left and right lanes A and B on both sides of the median strip C, which is the installation position.
A is arranged substantially in parallel, a pair of beams 12 and 12A are erected between the tracks 11 and 11A, and a hoist 13 which is a movable lifting device is provided on each of the beams 12 and 12A. It is a method of hoisting the precast concrete guard fence 1 (hereinafter referred to as a guard fence) temporarily placed in the center of the median strip C, which is the installation position, and an example of an apparatus used for this method. To explain, the crane-mounted trucks 11 and 11A are provided with a crane arm 14 having a maximum hoisting weight of about 3 tons at the front part thereof, and can be extended and stored on the side part thereof when the guard fence 1 is hoisted. 1, 11A is provided with a grounding leg 15 for stabilizing the load, and a pair of the beams 12, 12A is rotatably provided on the loading platform 16 of the truck 11 in the lower part of FIG. As shown in FIG. 2, 2 and 12A fix a pedestal 17 on the loading platform 16, and the pedestal 17
In the front and rear and the width direction, respectively, the rotation support 1
8 and 18 are erected, and each of the rotary columns 18 and 18 is rotated by a rotary drive device 19 disposed in the pedestal 17, and the rotary columns 18 and 18 are connected to the upper ends of the rotary columns 18 and 18 via a pivot shaft 20. Beams 12, 12
Each of the beams A and 12A is pivotally mounted so as to be vertically rotatable, and the beams 12 and 12A are vertically cantilevered by an unillustrated vertically rotating device. In addition, the truck 11A with a crane in the upper part of FIG. 1 is provided with an elevating table 21 on which the tip ends of the both beams 12, 12A can be placed and supported. An elevating device 22 such as the above is erected, and a mounting table portion 23 is provided on the upper part of the elevating device 22. In addition, the beams 12, 12A
Is made of, for example, an I-shaped steel, and rails 24 are provided below the beams 12 and 12A, and a lower surface of the rails 24 is provided with a downward rack 25 over substantially the entire length. An electric hoist 13, 13, which is a hoisting device, is detachably provided on the rail 24. The hoist 13 is a so-called geared trolley and is provided with a pinion gear 26 that meshes with the rack 24. The pinion gear 26 is used as a motor or the like. The beam 12, which is rotationally driven by a rotary drive device (not shown),
Move along 12A.

Next, a guard fence 1 using the above device
First, a plurality of guard fences 1 are temporarily placed on the lane A along the median strip C.
In this case, the guard fence 1 is unloaded from the bed of a not-illustrated transport vehicle arranged in the lane A, the arm 3 of the crane 2 has a large elevation angle and the turning radius R is small, and the guard fence 1 can be lifted with a margin. In addition, the horizontal turning angle θ is small, and the turning body 4 can be hung down without protruding to the adjacent lane a. As shown in FIGS. 1 and 2, the trucks 11 and 11A are arranged on both inner lanes A and B of the central separator C so as to sandwich the central separator C at one position of the guard fence which has been temporarily placed. In addition, the truck 11 in the lane A has both beams 12 and 12A.
Is fixed in a state of being swung in the longitudinal direction of the loading platform 16 and travels to a predetermined position. After placing both tracks 11 and 11A,
The beams 12, 12A are rotated by the rotary drive device 19 to rotate the beams 12, 12A approximately 90 degrees in a plane and the elevator 21 of the other truck 11A is moved up and down.
Support the tip of A. After this, the loading platform for trucks 11 and 11A
The hoist 13 mounted on the 16 is replaced by the rails of both beams 12 and 12A.
Set 2 units each on 24 and hang wire 13A of each hoist 13 on guard fence 1. Then, while hoisting, run the hoist 13 and guard fence 1
Move to the upper part of the installation position C and install. After the installation of one guard fence 1 is completed, both trucks 11 and 11A are moved to the position of the next guard fence 1 while both beams 12 and 12A are installed, and the hoist 13 is similarly used to perform installation. Then, the installation of all the guard fences 1 temporarily placed within the predetermined time is completed, and then the hoist 13 is attached to the beam 1.
Removed from 2, 12A and mounted on the loading platform 16, and all tools are also mounted on the truck 11, 11A, etc., while the rotary drive device 19
By turning both beams 12 and 12A in the opposite direction to the plane,
It fits within the width of 16 and is removed from the work place. Thus, when the traffic is open, the roads A, a, including the median strip C,
Remove all construction-related materials and equipment from B and b.

As described above, in this embodiment, in the concrete guard fence installation method of installing the precast concrete guard fence 1 in the length direction of the road, on both sides of the central separating strip C, which is the installation position of the guard fence 1, Tracks 11 and 11A as movable supports are arranged, beams 12 and 12A are erected between these supports 11 and 11A, and a guard fence 1 is provided by a lifting device 13 movable along the beams 12 and 12A. Since this is a construction method in which the guard fence 1 is moved in the road width direction and installed on the median strip C after the hoisting of the guard fence 1, unlike the conventional method of turning the arm 3 to install the guard fence 1, the beam 12 , 12A both ends of which are supported by tracks 11 and 11A, and their beams 12 and 12A
With the position fixed, the guard fence 1 is hoisted and moved in the width direction of the road, whereby the relatively heavy guard fence 1 is hoisted up without taking a space and moved to the installation place, and the installation can be performed easily. .

As described above, in this embodiment, in the concrete guard fence installation device for installing the precast concrete guard fence 1 in the lengthwise direction of the road, the central separating strip C which is the installation position of the guard fence 1 is used.
Tracks 11 and 11A, which are movable supports arranged on both sides of the track, and beams installed between these tracks 11 and 11A.
Since it is provided with 12, 12A and a hoist 13 which is a hoisting device capable of moving along the beams 12, 12A and capable of hoisting the guard fence 1, a relatively heavy guard fence 1 is provided.
Can be easily lifted and moved without taking up space, and after installation at one place, the beam 12,
It is possible to move both trucks 11 and 11A along the lane with 12A erected, install the next guard fence 1, and successively install the guard fence 1 in the length direction of the road. The installation work speed can be improved.

Further, as an effect of the embodiment, on a road with two lanes on each side, the trucks 11 and 11A are arranged in the one lane A and B on one side near the median strip C, so that the construction works. The construction can be performed while securing the traffic in the first lane a and b. In addition, the beams 12 and 12A are connected to one track 11
After the work is completed, the beams 12 and 12A are housed within the width of the cargo bed 16 of the truck 11 and moved together with the truck 11 by horizontally swinging and being able to be housed within the width of the cargo bed 16 of the truck 11.
It is possible to quickly leave the installation site without leaving any equipment, and even at the start of construction, if the beams 12 and 12A are turned and the tip side is placed on the lifting platform 21 of the other truck 11A, the set is completed. It can be completed and the preparation time can be greatly reduced. Further, the beams 12 and 12A are pivotally attached to the rotating column 18, and
Even when the heights of the roads A and B on both sides of the median strip C are different, the mounting table portion 23 of the elevating table 22 that supports the tips of the 12 and 12A can be moved up and down. The beams 12 and 12A can be horizontally arranged by adjusting the height, and the hoist 13 can move the guard block 1 stably. Further, since the rack 25 is provided on the rail 24 and the hoist 13, which is a hoisting device, is moved by the drive of the pinion gear 26 that meshes with the rack 25, the beams 12, 12A cannot be installed horizontally depending on the working conditions. However, due to the meshing of rack 25 and rail 24, hoist 13
You can drive stably.

FIG. 4 shows a second embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. An example is shown in which dedicated trucks 31 and 31A are used instead of using a traveling truck. These trucks 31 and 31A have wheels 32 on the front and rear and on the left and right, and are mounted or towed on a self-propelled vehicle such as a truck. It is configured to be movable. Also beams 12B, 12C
Is composed of a truss steel member 33 having an upper part made of steel and an I type steel member 34 at the lower part.

As described above, in this embodiment, in the concrete guard fence installation device for installing the precast concrete guard fence 1 in the length direction of the road, the guard fence 1 is arranged on both sides of the central separating strip C, which is the installation position. And a movable support truck 31 and 31A,
Beams 12B and 12C installed between these carriages 31 and 31A, and beams 12
Since it is provided with a hoist 13 that is a hoisting device that can move along B and 12C and can hoist the guard fence 1, both beams 12 and 12A are moved to the other bogie 31A side by the rotary drive device 19. Around 90 degrees on the plane, the elevator 21 of the other truck 11A is raised and lowered to support the tips of the beams 12B and 12C, and the guard fence 1 is hoisted by the hoist 13 and the central divider C
It is possible to move to and install the guard fence 1 that is relatively heavy, move it by lifting it up without taking up space, and install it on the median strip C. Both dolly with 12 and 12A installed
It is possible to move 31 and 31A along the lane, install the next guard fence 1, and install the guard fence 1 sequentially in the length direction of the road, which can improve the installation work speed. In the case where the width of the median strip C is relatively long, it has the same actions and effects as those of the first embodiment, and in this example, the truss steel material 33 and the I-shaped steel 34 are integrated to form the beams 12B and 12C. Is effective for.

FIG. 5 shows a third embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. In this embodiment, the beams 12D and 12E will be described. The beam 12D, 12E has a support leg body 41 serving as a support body rotatably pivotally attached to the tip end thereof via a pivot shaft 42, and the pivot shaft 42 is provided with an angle fixing mechanism (not shown). , Beams 12
The D and 12E and the support leg portion 41 are provided so as to be able to fix the angle, and a wheel 43 is provided at the lower end of the support leg portion 41, and the support leg portion 41 can be moved by the wheel 43.

When installing the guard fence 1, the truck 11 is fixed by the grounding legs 15, the beams 12D and 12E accommodated within the width of the cargo bed 11 are swung, and the beams 12D and 12E are also rotated.
After the support leg 41 at the tip of the is rotated downward to ground the wheel 43 and fixed to the beams 12D and 12E at approximately 90 degrees, the guard fence 1 is hoisted by the hoist 13 as in the above embodiments. Move and install. When the installation is completed, turn the beams 12D and 12E in the opposite direction to the plane and load the platform.
Stored within the width of 16 and leave truck 11 with the site.

As described above, in this embodiment, in the concrete guard fence installation device for installing the precast concrete guard fence 1 in the length direction of the road, the guard fence 1 is installed on both sides of the central separating strip C, which is the installation position. The movable support track 11 and the support leg 41, the beams 12D and 12E installed between the track 11 and the support leg 41, and the guard fence 1 movable along the beams 12D and 12E. Since the hoist 13, which is a hoisting device that can be hoisted, is provided, the relatively heavy guard fence 1 can be hoisted and moved without taking up space, and can be installed in the median strip C. After the installation of the location is completed, the truck 11 is moved along the lane with the beams 12D and 12E installed, and the next guard fence 1 is installed. The guard fence 1 can be sequentially installed continuously in the same direction, the installation work speed can be improved, the same operation and effect as those of the first embodiment can be achieved, and the beam 12D can be used as the other support. , 12E are pivotally attached to the tips of the support legs 41, 12E, respectively, so that the beams 12D, 12E can be easily erected by the single truck 11, and the support legs 41 are stored when the beams 12D, 12E are stored in the loading platform 16. Can be folded and stored compactly.

FIGS. 6 and 7 show a fourth embodiment of the present invention, in which the same parts as those in the first and third embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. In this example, an example in which the guard fence 1 is installed on the road end E near the slope D of the road with one lane A and B on one side is shown, and the beams 12D and 12E rotatably provided on the crane-equipped truck 11 include: An elastic support leg 41A serving as a support is provided instead of the support leg shown in the fourth embodiment.
41A is provided with a height adjusting jack 51 in the middle so that it can be expanded and contracted.

In installing the guard fence 1, the guard fence 1 is temporarily placed on the road A, and the truck 11 is arranged in the lane A to secure the traffic in the other lane B. Then, the beams 12D and 12E housed within the width of the loading platform 16
And the supporting legs 41A at the tips of the beams 12D and 12E are rotated downward to fix the beams at about 90 degrees with respect to the beams 12D and 12E. After grounding on the ground surface d, the guard fence 1 is hoisted by the hoist 13 and moved to the road end E which is the installation position for installation as in the above-described embodiments. Further, when the installation is completed, the extended support leg 41A is contracted and folded,
12D and 12E are swiveled in the opposite direction of the plane and stored within the width of the loading platform 16, and the truck 11 and the truck are withdrawn from the site.

As described above, in this embodiment, in the concrete guard fence installation device for installing the precast concrete guard fence 1 in the length direction of the road, the guard fence 1 is arranged on both sides of the road end E which is the installation position. The movable support track 11 and the support leg 41A, the beams 12D and 12E installed between the track 11 and the support leg 41A, and the guard fence 1 movable along the beams 12D and 12E. Since the hoist 13, which is a hoisting device that can be hoisted, is provided, the relatively heavy guard fence 1 can be hoisted and moved without taking a place, and can be installed at the road end D of the road. When the installation of one more place is completed, the truck 11 is moved along the lane together with the support legs 41A while the beams 12D and 12E are installed, and the next guard fence 1 is installed. It is possible to install the guard fence 1 continuously in the longitudinal direction of the road, to improve the installation work speed, and to obtain the same operation and effect as the first embodiment. In this example, the elastic support leg 41A serving as the other support is configured to be expandable and contractable, so that even if the ground contact surface d below the slope D has irregularities, the support leg 41A expands and contracts to the beam 12D, 12E can be kept horizontal.

FIGS. 8 and 9 show a fifth embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. An example of constructing the fence 1 at the road end E near the slope D of the road with one lane A and B on one side is shown. The crane truck 11 serving as a support is arranged on the road A which is one side of the road end E. , The beams 12 and 12A provided on the track 11 so as to be able to turn are horizontally turned to the side of the road end E and overhang, and the middle of these beams 12 and 12A is supported by a gate form frame 61 as a support member. Gate formwork
In the 61, both leg parts 62, 62 are connected at their upper parts by a lateral beam part 63, and a wheel 64 is provided at the lower part of the leg part 62, and the gate form 61 is moved by the wheel 64 in the length direction of the road A. Is possible,
The wheel 64 is grounded on the road A. Also, the gate formwork
The lower portion of the horizontal beam portion 63 of 61 is detachably attached to the upper portions of the beams 12 and 12A via an attachment member 65 such as a bolt and nut, and in the attached state, the hoist 13 travels in the gate form 61. It is possible.

When installing the guard fence 1, the guard fence 1 is temporarily placed on the road A, and the truck 11 is arranged in the lane A to secure traffic in the other lane B. Then, the beams 12 and 12A accommodated within the width of the cargo bed 16 are horizontally swiveled in the direction of the road end E, and after the swiveling, the gate form 61 is attached to and supported by the beams 12 and 12A, and the hoist is carried out in the same manner as in the above embodiments.
The guard fence 1 is lifted by 13 and moved to the road end E, which is the installation position, for installation. In this case, beams 12, 12A
Swivel horizontally to set, and guard fence 1
The installation work is performed with the truck 11 on the road A side and the gate form 61 to support the beams 12 and 12A even when the vehicle is moving, so that there is a building or obstacle outside the road on the right side of the figure. But construction can be done.

As described above, in this embodiment, in the concrete guard fence installation method in which the precast concrete guard fence 1 is installed in the length direction of the road, the road A which is one side of the road end E where the guard fence 1 is installed is located. A truck 11, which is a movable support, is disposed on the side, beams 12 and 12A are extended substantially horizontally from the truck 11 to the road end E side, and a midway between the beams 12 and 12A is a gate formwork that is a support member.
Installation to install the guard fence 1 on the road end E by hoisting the guard fence 1 by the hoist 13, which is a hoisting device supported by 61 and movable along the beams 12 and 12A. Because it is a method, the conventional arm 3
Unlike installing the guard fence 1 by turning the
The beams 12 and 12A are supported by the truck 11 and the gate form 61, and the guard fence 1 is lifted and moved in the width direction of the road with the beams 12 and 12A fixed in position. Can be easily moved up to the installation place without taking up space, and can be installed easily, with the same actions and effects as in the first embodiment, and the beams 12 and 12A can be set by turning horizontally. Moreover, since the installation work can be performed substantially horizontally even when the guard fence 1 is moved, the construction can be performed even when there is an obstacle such as an electric wire above the road A.

As described above, in this embodiment, in the concrete guard fence installation device for installing the precast concrete guard fence 1 in the length direction of the road, the road which is one side of the road end E where the installation position of the guard fence 1 is located. A truck 11 that is a movable support disposed on the A side, beams 12 and 12A extending substantially horizontally from the truck 11 to the road end E side, and a support member that supports the middle of the beams 12 and 12A. Since the gate form 61 and the hoist 13 that is a hoisting device that can move along the beams 12 and 12A and that can hoist the guard fence 1 are provided, the relatively heavy guard fence 1 can be installed in a small space. It can be easily lifted and moved without installing, and after installation at one location is completed, the beams 12 and 12A, which are partly supported and extended by the gate formwork 61, are used as the track 11. It is possible to move along the lane, install the next guard fence 1, and install the guard fence 1 sequentially and continuously in the length direction of the road, which can improve the installation work speed. .

The present invention is not limited to the above embodiment, but various modifications can be made within the scope of the present invention. For example, a winch or the like may be used as the hoisting device other than the hoist, and the winch may be manually or electrically moved along the beam by a pulley or the like. Further, the method and apparatus of the present invention can be used for various roads such as highways and general roads, and also for construction of guard fences for new roads as well as existing roads. Further, the shape of the support member is not limited to the gate form, and can be appropriately selected as long as it supports the beam.

[0029]

According to the installation method of claim 1, in the installation method of the concrete guard fence in which the precast concrete guard fence is installed in the length direction of the road, a movable support is provided on both sides of the installation position of the guard fence. A body is placed, a beam is installed between these supports, and a guard fence is hoisted by a hoisting device movable along this beam, and then this guard fence is moved in the road width direction to the installation position. Since it is to be installed, it is possible to provide a method for installing a concrete guard fence that saves space and is excellent in workability.

According to a second aspect of the present invention, in a concrete guard fence installation device for installing a precast concrete guard fence in a length direction of a road, a movable support arranged on both sides of the installation position of the guard fence. Since it is provided with a body, a beam installed between these supports, and a hoisting device movable along the beam and capable of hoisting the guard fence, it is space-saving and excellent in workability. A concrete guard fence installation device can be provided.

According to the third aspect of the present invention, in the method for installing a concrete guard fence in which a precast concrete guard fence is installed in the lengthwise direction of a road, a movable support is arranged at one side of the guard fence installation position. Then, a beam is extended substantially horizontally from the support body to the installation position side, the midway of the beam is supported by a support member, and a guard fence is lifted by a lifting device movable along the beam, and then the guard fence is lifted. Since the fence is moved in the width direction of the road and installed at the installation position, it is possible to provide a method for installing a concrete guard fence that is space-saving and has excellent workability.

The installation device of claim 4 is a concrete guard fence installation device for installing a precast concrete guard fence in the length direction of a road, wherein the movable support is arranged on one side of the installation position of the guard fence. A body, a beam extending substantially horizontally from the support to the installation position side, and a support member supporting the middle of the beam,
Since it is provided with a hoisting device that can move along the beam and can hoist the guard fence, it is possible to provide a concrete guard fence installation device that is excellent in workability and does not take up space. .

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a side view showing the first embodiment of the present invention.

FIG. 3 is a side view of an essential part showing the first embodiment of the present invention.

FIG. 4 is a side view showing a second embodiment of the present invention.

FIG. 5 is a side view showing a third embodiment of the present invention.

FIG. 6 is a side view showing a fourth embodiment of the present invention.

FIG. 7 is a side view for explaining the operation of the telescopic support leg body according to the fourth embodiment of the present invention.

FIG. 8 is a side view showing a fifth embodiment of the present invention.

FIG. 9 is a plan view showing a fifth embodiment of the present invention.

FIG. 10 is a plan view illustrating conventional construction.

[Explanation of symbols]

 1 Precast concrete guard fence 11, 11A Truck (support) 12, 12A, 12B, 12C, 12D, 12E Beam 13 Hoist (lifting device) 31, 31A Truck (support) 41 Support leg (support) 41A Telescopic Support leg (support) 61 Gate formwork (support member) C Median strip (installation position) E Road edge (installation position)

Claims (4)

[Claims] 1. A method for installing a concrete guard fence in which a precast concrete guard fence is installed in the lengthwise direction of a road, wherein movable supports are arranged on both sides of the installation position of the guard fence, and these supports are provided. A concrete that is characterized in that a beam is installed between the bodies, the guard fence is lifted by a hoisting device movable along the beam, and then the guard fence is moved in the road width direction to be installed at the installation position. How to install a guard fence. 2. A concrete guard fence installation device for installing a precast concrete guard fence in a length direction of a road, and movable supports arranged on both sides of the guard fence installation position, and these supports. An installation device for a concrete guard fence, comprising: a beam installed between them; and a hoisting device that can move along the beam and that can hoist the guard fence. 3. A method of installing a concrete guard fence for installing a precast concrete guard fence in a length direction of a road, wherein a movable support is arranged on one side of the installation position of the guard fence, and the support is moved from the support to the side. A beam is extended almost horizontally to the installation position side, the middle of this beam is supported by a support member, and a guard fence is lifted by a lifting device that can move along the beam, and then this guard fence is moved in the road width direction. And then installing the concrete guard fence at the installation position. 4. In a concrete guard fence installation device for installing a precast concrete guard fence in a length direction of a road, a movable support arranged on one side of an installation position of the guard fence, and A beam extending substantially horizontally to the installation position side, a support member for supporting the beam midway, and a hoisting device movable along the beam and capable of hoisting the guard fence. Installation equipment for the featured concrete guard fence.