JP2814344B2 - Lifting tool with hydraulic cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to lifting and mounting work of a hanging tool having a hydraulic cylinder, particularly a PC version of an outer wall of a building, steel frames (beams and columns), reinforcing bars, formwork panels, scaffolding materials and temporary materials. The present invention relates to a hanger having a hydraulic cylinder to be used.

[0002]

2. Description of the Related Art In a building construction, for example, a lifting work of a PC version on an outer wall is performed by using two chain blocks on a hanging hook 1 of a tower crane (not shown) installed on a building roof or the like as shown in FIG. The upper ends of the two chain blocks 2 are respectively hooked, and the lower ends of the two chain blocks 2 are respectively mounted on two chain block mounting portions (hanging points) 4 provided on the outer wall PC plate 3 placed on the ground so as to be spaced apart in the horizontal direction. The PC 3 on the outer wall is raised and lifted by the tower crane, moved to a predetermined place on the construction floor, and a worker on the construction floor adjusts the length of the chain block 2 and aligns and attaches it. I have.

When the outer wall PC plate 3 has a planographic shape, the right and left chain blocks 2 can be hung in a well-balanced manner by attaching the left and right chain blocks 2 to the outer wall PC plate 3 with equal length. In the case of the L-shaped outer wall PC plate 3 whose side end is bent at a right angle, the outer wall PC placed on the ground as shown in FIG.
When the plate 3 is raised, the weight applied to the left and right chain blocks 2 becomes unbalanced, which is not preferable.

Therefore, the position of the hanging point 4 is determined so that the center of gravity is located at the center on the line connecting the two hanging points 4 (therefore, the lengths of the left and right chain blocks 2 become the same when the upright operation is completed). I have.

[0005]

However, in order to erect such an L-shaped outer wall PC plate 3, it is necessary to adjust the length of the right and left chain blocks 2 at the start of the erecting as shown in FIG. When the chain block 2 is raised up evenly, the chain block 2 on the side having the bent portion is initially loosened as shown in FIG. 7, so that the balance is poor and the outer wall PC plate 3 becomes unstable, and only the other chain block becomes unstable. , The hanging point 4 may be damaged.

Therefore, as shown in FIG. 6, one of the left and right chain blocks 2 having a bent portion must be previously adjusted to be shorter than the other. However, in this case, as shown in FIG. When the upright is completed, the outer wall PC plate 3 tilts left and right, and the lower end corner of the outer wall PC plate 3 is likely to be damaged during the lifting process. In such a case, the left and right tilts are prevented in the upright process. Therefore, it is necessary for the operator to adjust the length of the left and right chain blocks 2 little by little, and this operation becomes extremely difficult when the chain block 2 is raised high.

Therefore, the work of raising an L-shaped PC plate or the like using a chain block is inferior in workability, and the outer wall PC
There were problems such as the construction period being delayed due to plate damage.

[0008] In addition, the outer wall PC version 3 by the tower crane
Is lifted to the construction floor, and the positioning work of fixing the outer wall PC plate 3 to the steel beam at the mounting position with a fastener is performed while the worker at the construction floor communicates with the crane driver by radio, and the crane driver It takes time to work based on wireless communication and information from the TV camera. Also, a worker on the construction floor leans out and manually operates the chain block 2 and the lever block (not shown),
The operation of adjusting the vertical position and the left and right height of the outer wall PC plate 3 using a level, a down swing, a curved line, etc. is extremely dangerous because it is performed at a high place.

The present invention has been made to eliminate the above disadvantages.

[0010]

SUMMARY OF THE INVENTION A lifting device having a hydraulic cylinder according to the present invention comprises two selectively drivable hydraulic cylinders each having a piston rod connected to two points of the article to move the article up and down. And means for opening and closing the two hydraulic cylinders defined by the pistons so as to be able to open and close each other between the one chamber and the other chamber.

[0011] The two hydraulic cylinders are suspended by a hydraulic control device which is remotely operated to control the two hydraulic cylinders.

The above-mentioned articles are PC plates for building outer walls, steel frames (beams and columns), reinforcing bars, form panels, scaffolding materials and temporary materials.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIG. 1, a hoist 6 having left and right hydraulic cylinders 5 is used, and the left and right hydraulic cylinders 5 can be remotely controlled by radio.

In FIG. 1, reference numeral 7 denotes a hydraulically operable hydraulic control device for the left and right hydraulic cylinders 5, 8 denotes a suspending wire for suspending the suspending tool 6 by a hook 1 of the crane, and 9 denotes a suspending wire. A wire connecting the hydraulic cylinder 5 and the hanging point 4.

FIG. 2 shows a hydraulic circuit diagram of the hydraulic control device 7, wherein 10 is an engine, 11 is a hydraulic pump driven by the engine 10, 12, 12 are switching valves, 13, 12
Reference numeral 13 denotes a bypass circuit which is wirelessly opened and closed. The hydraulic pressure from the hydraulic pump 11 is applied to one of the left and right hydraulic cylinders 5 and 5 via the switching valves 12 and 12, whereby the hydraulic cylinder 5 , 5 piston 1
4, 14 come to fall.

When the switching valves 12 and 12 are switched, hydraulic pressure is applied to the other chambers of the hydraulic cylinders 5 and 5, whereby the pistons 1 of the hydraulic cylinders 5 and 5 are moved.
4, 14 move up.

The corresponding chambers of the left and right hydraulic cylinders 5 and 5 are connected to each other by bypass circuits 13 and 13, respectively, and a change in hydraulic pressure in one of the chambers is immediately transmitted to the other.

Since the hanging tool having the hydraulic cylinder of the present invention has the above-described structure, the work of raising the outer wall PC plate and the operation of vertically positioning it can be performed as follows.

Raising work

During the erecting operation, the bypass circuit 1
Open 3,13. As a result, the loads applied to the left and right hydraulic cylinders 5, 5 become uniform. Therefore, FIGS. 3 and 4
In order to raise the outer wall PC plate 3 placed on the ground as shown in (1), the left and right hydraulic cylinders 5 and 5 are controlled so that the wire 9 is not slackened and the lifting tool 6 is raised.

When the lifting tool 6 is raised, the wire 9 on the side without the bent portion, for example, the side of the one hydraulic cylinder 5 is loosened. When the lifting tool 6 is further raised from this state, a load is applied only to the other hydraulic cylinder 5, so that the hydraulic pressure in the lower chamber of the other hydraulic cylinder 5 increases. 1
3 to the lower chamber of said one cylinder 5 so that the piston 1 of this one hydraulic cylinder 5
4 is moved upward, and the corresponding wire 9 becomes loose. Therefore, the load is evenly applied to the left and right cylinders, and the outer wall PC plate 3 is lifted horizontally and stably.

Further, even if the load applied to the left and right hydraulic cylinders 5 and 5 fluctuates while the lifting tool 6 is being lifted, this fluctuation is immediately corrected, and the outer wall PC plate 3 can be lifted in a well-balanced manner.

FIGS. 3 and 4 are a front view and a side view, respectively, for explaining the above operation.

Vertical positioning work

In the vertical positioning work for temporarily fixing at the intended construction floor, the above-mentioned bypass circuits 13 and 13 are used.
Is closed, and the left and right hydraulic cylinders are independently adjusted wirelessly to fine-tune the position of the outer wall PC plate 3.

The fine adjustment of each hydraulic cylinder at the time of such positioning is desirably performed by an inching mechanism (not shown). This inching mechanism is such that, for example, if the operation button is pressed once, even if the operation button is kept pressed, the hydraulic cylinder is set only by the timer, for example, only for one second, so that the length of the hydraulic cylinder is reduced. You can make fine adjustments.

[0028]

As described above, according to the lifting tool having the hydraulic cylinder of the present invention, it is possible to prevent damage to the outer wall PC plate at the time of erecting, to lift the PC wall in a well-balanced manner, In the positioning operation, the height of the outer wall PC plate can be finely adjusted by radio, so that it can be easily attached to a steel frame or the like, the construction period can be shortened, and there is a great advantage that the operation is less dangerous. .

[Brief description of the drawings]

FIG. 1 is a front view of a hanger having a hydraulic cylinder according to the present invention.

FIG. 2 is a hydraulic control circuit diagram of a hanging tool having a hydraulic cylinder according to the present invention.

FIG. 3 is an explanatory front view of the lifting and lifting work of the hanging tool having the hydraulic cylinder of the present invention.

FIG. 4 is an explanatory side view in the erecting and lifting work of the hanging tool having the hydraulic cylinder of the present invention.

FIG. 5 is a front view of a conventional hanging device.

FIG. 6 is a side view for explaining an erecting operation using a conventional hanging tool.

FIG. 7 is a side view for explaining a raising operation by a conventional hanging tool.

FIG. 8 is an explanatory front view of an upright operation using a conventional hanging tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hanging hook 2 Chain block 3 Exterior wall PC version 4 Hanging point 5 Hydraulic cylinder 6 Hanging tool 7 Hydraulic control device 8 Wire 9 Wire 10 Engine 11 Hydraulic pump 12 Switching valve 13 Bypass circuit 14 Piston

──────────────────────────────────────────────────続 き Continuing from the front page (72) Katsuhiko Anzai, Inventor Katsuhiko Ansai 9-80, Mikawakita-cho, Fukushima-shi, Fukushima Fukushima Manufacturing Co., Ltd. (56) References 1-147374 (JP, U) JP-A 2-4887 (JP, U) JP-A 63-17184 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B66C 13/00 -15/06

Claims (3)

(57) [Claims] 1. An article 2 for moving the article up and down.
Two selectively drivable hydraulic cylinders each having a piston rod connected thereto at each location, and connecting one chamber and the other chamber of the two hydraulic cylinders defined by the pistons to each other. A lifting device having a hydraulic cylinder, characterized by comprising means for allowing the opening and closing to communicate. 2. A lifting device having a hydraulic cylinder according to claim 1, wherein said two hydraulic cylinders are suspended by a hydraulic control device which is remotely operated to control said two hydraulic cylinders. 3. The hanging tool having a hydraulic cylinder according to claim 1, wherein the article is a PC version of an outer wall for building, a steel frame (beam, column), a reinforcing bar, a form panel, a scaffold or a temporary material.