JP2003013428A - Method for executing concrete placing works in dam construction, etc., and attachment for forklift for use in the concrete placing works - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for smoothly executing concrete placing works in dam construction, etc. SOLUTION: The method for executing the concrete placing works in the dam construction, etc., is carried out by setting a concrete form 30 and pouring concrete inside the concrete form 30. According to the method, an attachment for rockably hanging the concrete form 30 is detachably attached to a fork claw 6 of a side-shifting-type forklift. Therefore, the concrete form 30 is hung by using the attachment attached to the forklift, and set at a predetermined location.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pouring method for pouring concrete in dam construction, revetment construction of rivers, and the like, and a forklift attachment used for the concrete pouring construction.

[0002]

2. Description of the Related Art Conventionally, in the construction of dams, a concrete formwork is installed, concrete is poured into the inside of the concrete formwork, and a concrete placing work is performed. By doing it step by step,
I was trying to build concrete for the dam. In the concrete pouring work in this dam construction, a work vehicle was used to transport the concrete formwork and install it at a predetermined place, but this work vehicle was a dedicated concrete pouring work with an improved forklift. It was a working vehicle.

As shown in FIG. 8, this work vehicle for concrete pouring work is provided with a pair of left and right masts 43 that are vertically movable by a side shift cylinder 42 in the front part of a vehicle body 41. 43 is provided with a lifting body 45 that moves up and down by a lift cylinder 44,
A pair of left and right rail portions 46 facing forward are formed on the lower portion of the lifting body 45. And this lifting body 45
A pair of up and down left and right masts 48 that are movable back and forth by a reach cylinder 47 along the rail portion 46 of the mast 48 are tilted forward and backward by a tilt cylinder 49. In addition, the rail portion 46 of the lifting body 45
It also has an outrigger 50. And this mast 4
8 is provided with a tip lifting / lowering body 52 which is vertically moved by a lift cylinder 51.
3 and has a downward arm bracket 54
A clamp 55 for holding a grip 36 for clamping the concrete formwork 30 is provided at the lower end of the end of the clamp 55.

On the other hand, as shown in FIG. 9, the concrete formwork 30 has a grid-shaped rib 32 formed on substantially the entire one surface of a plate-shaped metal plate 31, and a clamp-shaped handle for gripping the rib 32. A plurality of 36 are provided. Further, a plurality of rod-shaped mounting brackets 33 for installation and fixing extending downward are provided at equal intervals on the lower portion. Further, although not shown, the concrete formwork 30 is provided with a workbench in the form of a frame on which an operator rides when installing and fixing the concrete formwork 30.

In the concrete pouring work in the dam construction using the work vehicle and the concrete formwork 30 for the concrete pouring work as described above, in the concrete end of the dam under construction of the body 41 of the work vehicle. The vehicle is stopped near the vehicle part, and the outrigger 50 is operated there to operate the vehicle body 41.
To fix. Further, the clamp 55 for clamping the concrete formwork 30 is clamped by the clamp 55 at the tip, and the concrete formwork 30 is held in a fixed state. Then, the concrete formwork 30 held in a fixed state by the clamp 55 is placed at a predetermined angle and a predetermined position, that is, in conformity with the concrete side surface of the dam. Also, on the slope on the downstream side of the dam, the concrete formwork 30 is also installed at a predetermined position with the same oblique angle, and the mounting bracket 33 of the concrete formwork 30 is bolted to the vertical or sloped surface of the concrete of the dam. Fixed to. A large number of this concrete formwork 30 are installed horizontally. And
Concrete is poured into the plurality of installed concrete formwork 30 to perform a concrete placing work. The concrete for the dam will be constructed by gradually performing this pouring work upward.

[0006]

In the conventional concrete pouring work, in the case of a dedicated work vehicle for concrete pouring work, the concrete formwork is held fixed by the clamp at the tip. , For example,
When the concrete formwork was held diagonally in accordance with the slope on the downstream side of the dam, the held concrete formwork came to be directed diagonally downward to the front, and a large load might be applied to the front of the vehicle body. Therefore, it is necessary to increase the size of the vehicle body in order to prevent the vehicle body from falling forward, which causes a problem that the vehicle body becomes very large and expensive.

Further, since the concrete formwork is held in a fixed state by the clamp at the tip,
There is no degree of freedom in positioning the concrete formwork at the installation site, and the positioning work is extremely difficult because the vertical movement of the lifting body, the vertical movement of the mast, and the vertical movement and rotation of the tip lifting body are used for positioning. It was difficult.

Further, in a dedicated work vehicle for concrete pouring work, an elevating body that moves up and down along a mast, a mast that moves back and forth along a rail portion of the elevating body, or up and down along this mast. Since various mechanisms such as a tip lifting body having a moving rotation mechanism section were provided, there was a problem that the structure was very complicated and the weight became very heavy.

Moreover, the industrial vehicle is a specially improved forklift for concrete placing work.
Therefore, it is difficult to use the industrial vehicle for other work such as normal cargo handling work, and there is a problem that the versatility is extremely low.

The present invention solves these problems and provides a concrete placing method which can favorably perform concrete placing work in dam construction and the like, and an attachment for a forklift used for this concrete placing work. Is the task.

[0011]

[Means for Solving the Problems] The first invention is to install a concrete formwork, pour concrete into the concrete formwork, and place concrete in a dam or the like. In the construction method, an attachment for swingably suspending the concrete formwork is detachably attached to the fork claws of a side shift type forklift, and the concrete formwork is suspended and transported using the attachment attached to this forklift, It is a concrete pouring construction method in dam construction etc. in which a concrete formwork is installed at a predetermined place.

A second aspect of the present invention is an attachment for a forklift used for concrete placing work in dam construction or the like, in which concrete is poured into the installed concrete formwork and the concrete is placed in a dam or the like. In addition to having a fitting part that allows the fork claws of a forklift truck of the type to be inserted, a hook for hooking the suspension ring of the concrete formwork is provided at the tip, and by using this suspension hook to hook the suspension ring of the concrete formwork, concrete It is an attachment for a forklift used for concrete placing work, in which the form frame is oscillatedly suspended and conveyed so as to be installed at a predetermined place.

[0013]

[Operation] According to the first invention, by suspending the concrete formwork swingably, it is possible to significantly reduce a large load applied to the front of the vehicle body, and it is possible that the concrete vehicle will fall forward of the vehicle body. Can be eliminated. Moreover, when the concrete formwork is installed at a predetermined place, the suspended concrete formwork can be slightly swung back and forth or left and right to perform fine adjustment.

According to the second aspect of the invention, the attachment is provided with a fitting portion into which a fork claw of a forklift can be inserted, and a suspension hook for hooking a suspension ring of a concrete formwork at its tip. It can have a simple structure.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a method for placing concrete in dam construction or the like according to the present invention and an attachment for a forklift used in this concrete placing work will be described.

First, a normal side-shift type forklift is used as the work vehicle. As shown in FIG. 1, this side-shift type forklift truck is provided with a side-shift cylinder 5 sideways on an elevating body 4 which is vertically moved by a lift cylinder 3 along a mast 2 provided on a front portion of a vehicle body 1. The side shift cylinder 5 allows the fork claw 6 to move left and right.

As an attachment for a forklift used in concrete placing work, as shown in FIGS.
Also, as shown in FIG. 4, a pair of left and right pod-like fitting portions 11 into which the fork claws 6 of the side-shift type forklift can be inserted are provided, and the fitting portions 11 include a bolt 12 provided at the front portion and a rear end. By being fixed to the fork pawls 6 of the forklift by the lock pin 13 provided on the forklift trucks, the fork pawls 6 can be attached and detached freely. Then, the frame 14 is attached to the left and right fitting portions 11, and the frame 1
4 is a horizontal plate member 15 directed to the left and right and a vertical plate member 16 directed to the front and rear
And are fixed to each other, and ribs 17 are provided on the upper portions thereof. Then, a hanging hook 1 for attaching a base plate 18 directed to the left and right to the front part of the frame 14 and hooking a hanging ring 35 of a concrete formwork 30 under the base plate 18
A plurality of 9, for example, 3 are provided. The suspension hook 19 has a structure in which a bolt portion 20 formed on the upper portion is inserted into a hole 21 formed on the base plate 18, and the upper portion is fixed by a nut 22 to be attached. The holes 2 formed in the base plate 18
It is possible to change the mounting position of the hanging hook 19 by increasing the number of 1 and arrange the hanging hook 19 at a desired position so that it can be applied to concrete formwork 30 having different specifications. .

On the other hand, as shown in FIG. 5, the concrete formwork 30 has grid-shaped ribs 32 formed on substantially the entire one surface of a plate-shaped metal plate 31. Further, a plurality of rod-shaped mounting brackets 33 for installation and fixing extending downward are provided at equal intervals in the lower portion, and a plurality of holes 34 for bolt penetration are formed in the mounting bracket 33. Further, although not shown, the concrete formwork 30 is provided with a workbench in the form of a frame on which an operator rides when installing and fixing the concrete formwork 30. Further, three U-shaped suspension rings 35 are provided on the upper portion of the concrete formwork 30, and the suspension rings 35 are hooked by the suspension hooks 19.

As described above, in the attachment for a forklift used for concrete placing work, the fitting portion 1 into which the fork pawl 6 of the forklift can be inserted.
1 and the structure in which the hanging hook 19 for hooking the hanging ring 35 of the concrete formwork 30 is only provided at the tip end, the structure is compared with the conventional clamp 55 holding the concrete formwork 30. Is extremely simple.

Next, a concrete pouring method for dam construction will be described. First, the attachment is attached to the fork claw 6 of a side shift type forklift.

Then, in the work on the vertical surface on the upstream side of the dam, the suspension hook 19 of the attachment attached to the fork claw 6 is hooked on the suspension ring 35 of the concrete formwork 30 so that the concrete formwork 30 can swing. Be suspended. Then, as shown in FIG. 6 (a), the vehicle body 1 of the forklift is moved forward and conveyed with the concrete formwork 30 suspended, and stopped near the concrete end of the dam being constructed. Then, as shown in FIG. 6B, the suspended concrete formwork 30 is lowered to a predetermined height. At this time, by moving the fork claws 6 left and right by the side cylinders 5 as needed, the concrete formwork 3
Move 0 to align. Next, the vehicle body 1 of the forklift is slightly moved backward, and when the mounting bracket 33 of the concrete formwork 30 comes into contact with the vertical surface of the concrete, the backward movement of the vehicle body 1 of the forklift is stopped. If necessary, the suspended concrete form 30 is slightly rocked back and forth or left and right to perform fine adjustment for positioning. Then, as shown in FIG. 6C, the mounting bracket 33 of the concrete formwork 30 is fixed to the vertical surface of the concrete with bolts, whereby the concrete formwork 30 is installed at a predetermined place. After installation, attach the attachment hook 19 to the suspension ring 3 of the concrete formwork 30.
Remove from 5. A large number of this concrete formwork 30 are installed horizontally. Then, the concrete is poured into the inside of the plurality of installed concrete formwork 30,
Pour construction to pour concrete. The concrete for the dam will be constructed by gradually performing this pouring work upward.

Further, after the concrete is poured into the concrete formwork 30 and the poured concrete is hardened, the body 1 of the forklift is advanced and stopped near the concrete end of the dam, and after the attachment, the attachment is stopped. The hanging hook 19 of 1 is hooked on the hanging ring 35 of the concrete formwork 30. Then, this time, the bolt of the mounting bracket 33 of the concrete formwork 30 fixed to the vertical surface of the concrete is removed, and the concrete formwork 30 is removed.
Is hung by the hanging hook 19. Then, the concrete formwork 30 is raised above the upper surface of the concrete, and after the rise, the vehicle body 1 of the forklift is moved backward to convey the concrete formwork 30.

When the concrete formwork 30 used on the lower side is continuously used on the upper side, the bolts of the bracket 33 for mounting the concrete formwork 30 are removed,
After suspending the concrete formwork 30 with the suspension hooks 19, the concrete formwork 30 is lifted to a predetermined height to align the positions. If necessary, the suspended concrete form 30 is slightly rocked back and forth or left and right to perform fine adjustment for positioning. Then, the mounting bracket 33 of the concrete formwork 30 is fixed to the vertical surface of the concrete with bolts, whereby the concrete formwork 30 is installed again at a predetermined place.

On the other hand, the work on the slope on the downstream side of the dam is basically the same as the work on the vertical surface on the upstream side of the dam, but is as follows. Attach the attachment hook 19 attached to the fork claw 6 to the concrete formwork 30.
To suspend the concrete formwork 30 so that the concrete formwork 30 can swing freely. Then, as shown in FIG. 7A, the vehicle body 1 of the forklift is moved forward to advance the concrete formwork 30.
Is transported in a suspended state and stopped near the concrete end of the dam being constructed. Then, the suspended concrete formwork 30 is lowered to a predetermined height. This time,
The side cylinder 5 moves the fork claws 6 to the left or right as needed, thereby moving the concrete formwork 30 and aligning the positions. Then, as shown in FIG. 7B, the concrete formwork 30 is lowered to bring the mounting bracket 33, which is the lower end of the concrete formwork 30, into contact with the slope of the concrete. Next, the vehicle body 1 of the forklift is moved backward, the concrete formwork 30 is gradually tilted down, and when the concrete formwork 30 becomes substantially parallel to the slope,
Stop the reverse movement of the forklift body 1. If necessary, the suspended concrete form 30 is slightly rocked back and forth or left and right to perform fine adjustment for positioning. Then, as shown in FIG. 7C, the concrete formwork 30
The concrete formwork 30 is installed at a predetermined place by fixing the mounting bracket 33 of 1 to the slope of the concrete with bolts. After installation, the attachment hook 19 of the attachment is removed from the suspension ring 35 of the concrete formwork 30. A large number of this concrete formwork 30 are installed horizontally. Then, the concrete is poured into the plurality of the installed concrete formwork 30 to perform the placing work for placing the concrete. The concrete of the dam will be constructed by gradually performing this casting work upward.

Further, after the concrete is poured into the concrete formwork 30 and the poured concrete is hardened, the body 1 of the forklift is moved forward and stopped near the concrete end of the dam, and after the attachment, the attachment is made. The hanging hook 19 of 1 is hooked on the hanging ring 35 of the concrete formwork 30. Then, this time, the bolt of the mounting bracket 33 of the concrete formwork 30 fixed to the slope of the concrete is removed, and the concrete formwork 30 is suspended by the suspension hook 19. Next, the vehicle body 1 of the forklift is advanced to gradually raise the concrete formwork 30, and when the concrete formwork 30 hangs down, the advancement of the vehicle body 1 of the forklift is stopped. Then, the concrete formwork 30 is raised above the upper surface of the concrete, and after the rise, the vehicle body 1 of the forklift is moved backward to convey the concrete formwork 30.

When the concrete formwork 30 used on the lower side is continuously used on the upper side, the bolts of the mounting bracket 33 of the concrete formwork 30 are removed,
After suspending the concrete formwork 30 with the suspension hooks 19, the vehicle body 1 of the forklift is once moved forward, and the concrete formwork 30 is gradually raised and hung down. Then, raise the concrete formwork 30 to a predetermined height,
Adjust the position. Next, the vehicle body 1 of the forklift is moved backward, the concrete formwork 30 is gradually tilted down, and when the concrete formwork 30 becomes substantially parallel to the slope, the backward movement of the bodywork 1 of the forklift is stopped. If necessary, the suspended concrete form 30 is slightly rocked back and forth or left and right to perform fine adjustment for positioning. Then, the mounting bracket 33 of the concrete formwork 30 is fixed to the slope of the concrete with bolts, whereby the concrete formwork 30 is installed again at a predetermined place.

As described above, in the concrete pouring construction method in dam construction, etc., the attachment for suspending the concrete formwork 30 swingably is detachably attached to the fork claw 6 of the side shift type forklift.
A state in which the concrete formwork 30 is fixed by the conventional clamp 55 by suspending and transporting the concrete formwork 30 using the attachment attached to this forklift and installing the concrete formwork 30 at a predetermined place. Concrete formwork 3 compared to what is held in
By suspending 0 in a swingable manner, it is possible to significantly reduce a large load applied to the front of the vehicle body 1.
I try to eliminate the risk of falling forward.

When the concrete formwork 30 is installed at a predetermined place, the concrete formwork 30 is oscillated by an attachment so that the hung concrete formwork 30 is slightly swung back and forth or left and right. The concrete form 30 is easily positioned by fine adjustment.

Further, in the forklift, the attachment can be mounted for concrete pouring work, and the attachment can be removed to perform other work such as normal cargo handling work. .

Although the concrete pouring construction method described above has been described as a construction method for dam construction, the construction method is not limited to this and may be applied to river bank construction and other construction. It is possible.

[0031]

According to the present invention, since a concrete formwork is oscillatedly suspended and conveyed, and the concrete formwork is installed at a predetermined place, a large load acts on the front of the vehicle body. It is possible to suppress the increase in size of the vehicle body and to reduce the size of the vehicle body by significantly reducing the risk of falling to the front of the vehicle body, and to provide the vehicle body at a low cost. Moreover, when the concrete formwork is installed at a predetermined place, the suspended concrete formwork can be slightly rocked back and forth or left and right to perform fine adjustment, and the positioning work can be performed extremely easily.

Further, the attachment is provided with a fitting portion into which a fork claw of a forklift can be inserted, and a structure in which a hanging hook for hooking a hanging ring of a concrete formwork is simply provided at a tip thereof.
The structure can be extremely simple and very light in weight.

In addition, the forklift can be used for concrete placing work by mounting this attachment, and by removing the attachment, other work such as normal cargo handling work can be performed. It is possible to cope with various kinds of work extremely well and to make it highly versatile.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a side shift type forklift.

FIG. 2 is a plan view of an attachment for a forklift according to the present invention.

FIG. 3 is a side view of an attachment for a forklift according to the present invention.

FIG. 4 is a perspective view of an attachment for a forklift according to the present invention.

FIG. 5 is a front view of a concrete formwork according to the present invention.

FIG. 6 (a) is a work state explanatory view of the concrete pouring construction method according to the present invention. (B) It is a work state explanatory drawing of the concrete pouring construction method by this invention. (C) It is a working state explanatory drawing of the concrete pouring construction method by this invention.

FIG. 7 (a) is a work state explanatory view of the concrete pouring construction method according to the present invention. (B) It is a work state explanatory drawing of the concrete pouring construction method by this invention. (C) It is a working state explanatory drawing of the concrete pouring construction method by this invention.

FIG. 8 is an explanatory view of a conventional work vehicle for concrete placing work.

FIG. 9 is a front view of a conventional concrete formwork.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Car body, 2 ... Mast, 3 ... Lift cylinder, 4 ... Lifting body, 5 ... Side shift cylinder, 6 ... Fork claw, 11
... Fitting part, 12 ... Bolt, 13 ... Lock pin, 14 ... Frame, 15 ... Horizontal plate material, 16 ... Vertical plate material, 17 ... Rib, 1
8 ... Base plate, 19 ... Hanging hook, 20 ... Bolt part, 2
1 ... Hole, 22 ... Nut, 30 ... Concrete formwork, 31
... metal plate, 32 ... rib, 33 ... mounting bracket,
34 ... Hole, 35 ... Suspension ring, 36 ... Handle, 41 ... Car body, 4
2 ... Side shift cylinder, 43 ... Mast, 44 ... Lift cylinder, 45 ... Lifting body, 46 ... Rail part, 47 ... Reach cylinder, 48 ... Mast, 49 ... Tilt cylinder, 50 ... Outrigger, 51 ... Lift cylinder, 52
... Tip elevating body, 53 ... Rotation mechanism part, 54 ... Arm bracket, 55 ... Clamp.

Claims (2)

[Claims] 1. A method for placing concrete in a dam, etc., in which concrete formwork 30 is installed, and concrete is poured into the inside of the concrete formwork 30 to place concrete in a dam, etc. An attachment that removably suspends the concrete formwork 30 is detachably attached to the fork claws 6 of the forklift, and the concrete formwork 30 is hung and conveyed using the attachment attached to this forklift, and the concrete formwork 30 is A concrete pouring construction method in dam construction, etc., characterized by being installed at a predetermined place. 2. A side-shift type forklift attachment for a forklift used for concrete placing work in a dam construction or the like, in which concrete is poured into the installed concrete formwork 30 and the concrete is placed in the dam or the like. In addition to the fitting portion 11 into which the fork claw 6 of FIG. 3 can be inserted, a suspension hook 19 for hooking the suspension ring 35 of the concrete formwork 30 is provided at the tip, and the suspension ring 35 of the concrete formwork 30 is attached by the suspension hook 19. An attachment for a forklift used in a concrete placing work, characterized in that the concrete formwork 30 is oscillatedly hung so that it can be hung and conveyed to be installed at a predetermined place.