JPH046449Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a formwork lifting device for changing the formwork during the construction of walls, cylinders, columns, etc. as relatively high concrete structures. It is.

``Conventional technology'' Conventionally, the formwork method for constructing relatively tall concrete buildings of this type has been to use large unitized panels and temporary scaffolding installed on both sides of the concrete wall. After installing the large panel by moving it horizontally or vertically using a lifting machine installed outside or by moving the large panel horizontally or vertically using a lifting machine installed outside and installing the panel, concrete is poured into it, and then the concrete is hardened. After this, the panels were removed from the concrete surface and placed on top using the lifting machine or the like.

``Problems that the invention seeks to solve'' However, in the conventional formwork construction method, a large number of formwork carpenters are required. As each panel is set one by one and demolded panels are replaced using a lifting machine, construction is complicated, the construction accuracy is poor, the wall finish is poor, the construction period is long, and there is a limit to the construction height. There were disadvantages such as the high frequency of use of the lifting machine.

The object of the present invention is to provide a form lifting and lowering device to improve the above-mentioned drawbacks.

"Means for Solving the Problems" In order to solve the problems mentioned above, the present invention provides a pair of elevators that can be raised and lowered freely along the vertical members of a pair of gate-shaped frames, and a wall mounted inside the elevators. A pair of upper formwork and lower formwork are arranged for constructing the formwork, and a separator attached to the pair of upper formwork and lower formwork to maintain them at a constant width can be freely fitted and removed. A plurality of fixing center hole jacks are attached, the elevator is provided with jacks that are detachable by pin connection to the upper formwork and the lower formwork, and the portal frame is detachably attached to the upper formwork and the lower formwork. It is characterized in that it is disposed across the wall by means of fixing means.

For example, it is preferable that the elevator is raised and lowered by a rack provided on a vertical member and a pinion attached to the elevator via a drive source, and the portal frame is attached to a wheel retractably attached to the fixing means. Therefore, it may be movable in the horizontal direction along rails fixed to the upper formwork and the lower formwork.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of the present invention, in which FIG. 1 is a side view of the formwork lifting device, and FIG.
The figure is a front view of a formwork lifting device used to construct a wall.

In the figure, reference numeral 1 indicates a pair of gate-shaped frames installed so as to straddle the wall H to be constructed, and a pair of elevators 2, 2 are attached to the vertical members 1a, 1a.
is attached so that it can be raised and lowered. Inside the pair of elevators 2, 2, there is a pair of upper formworks 3, 3 using large panels to construct the wall H, respectively.
and lower formworks 4, 4 are provided.

As shown in FIG. 2, the pair of gate-shaped frames 1 are connected in parallel by horizontal members 1b along the wall surface H to be constructed, and the vertical members 1a include:
As shown in FIG. 1, a rack 5 is formed along it. Further, the portal frame 1 is attached to the upper formwork 3 inside the vertical member 1a of the portal frame 1.
and a fixing means 1 that is detachably fixed to the lower formwork 4.
c, 1c, . . . are provided, and iron frames 6, 6 for scaffolding are attached to the outside. The elevator 2 has a vertical member 1 of a pair of portal frames 1.
A frame 2a provided between a and 1a, and this frame 2
In order to raise and lower the frame 2a along the vertical member 1a, the pinion 8 is attached to both sides of the frame 2a via drive source motors 7, 7 so as to mesh with the rack 5. . In addition, a movable part is attached to a gate-shaped frame 1 at a predetermined location of the frame body 2a.
The front end portion 9a of the movable part is connected to the brackets 10, 10,... which are fixed at predetermined positions of the upper formwork 3 and the lower formwork 4, and pins. It is formed to be detachable by joining. Further, when pouring concrete into predetermined locations of the pair of upper formwork 3 and lower formwork 4, the formworks are held at a constant interval,
Center holder jacks 12, 12, . . . are provided to removably fix both ends of separators 11, 11, . . . provided to prevent the formwork from deforming.

Next, a method for constructing the wall H using the formwork lifting device having the above configuration will be described.

(1) First, the reinforcing bars to be placed inside the first stage wall H to be constructed are assembled, and a pair of lower formworks 4, 4 for concrete pouring are installed symmetrically on both sides of the reinforcing bars, and then, The separators 11, 11, ... are inserted through the center holder jacks 12, 12, .
12, . . . to fix the lower formworks 4, 4 to each other, concrete is poured into the lower formworks 4, 4.

(2) Next, after the poured concrete has hardened to a predetermined hardness, a second stage of reinforcing bars (indicated by reference numeral 13 in Figure 1) is installed in the upper part of the wall H, and then the The upper formwork 3 is installed symmetrically so as to overlap the upper part of the lower formwork 4, and then the upper formworks 3, 3 are attached to the center holder jacks 12, 1.
Separators 11, 11,... inserted into 2,...
are fixed to each other by engaging both ends of the

(3) A portal frame 1 equipped with the elevator 2 is attached to the outside of the pair of upper formwork 3 and lower formwork 4 installed as described above, using fixing means 1c, 1c, . . . so as to straddle them. Attach it.

(4) When the portal frame 1 is fixed to the formwork, the motor 7 is driven to rotate the pinion 8 while meshing with the rack 5, and the elevator 2
is moved to the position of the upper formwork 3 installed in the second stage, and then the tip 9a of the jack 9 is extended to the bracket 10 of the upper formwork 3 and fixed by pin joining.

(5) Next, concrete is poured into the upper formwork 3 in the above state. While pouring concrete into the formwork, by keeping the jacks 9 of the elevator 2 fixed to the formwork, it is possible to prevent the formwork from spreading.

(6) After the poured concrete has hardened to a predetermined hardness, the tip 9a of the jack 9 is removed from the upper formwork 3.
At the same time, the jacks 9 are retracted to release the elevator 2 from the upper formwork 3, and then the elevator 2 is lowered to the lower formwork 4, and the jacks 9 are extended and the pins are connected to the lower formwork 4.
Fixed to.

(7) Next, with the elevator 2 fixed to the lower formwork 4, move the center holder jack 1 of the lower formwork 4.
2, 12,... and separators 11, 11,
After releasing the meshing state, the jacks 9 are contracted to separate the lower formworks 4, 4 from the completed wall H. At that time, separator 1
1, 11, . . . are buried inside the wall H.

(8) Next, the inside of the lower formwork 4 that has been peeled off from the wall H is cleaned, and the reinforcing bars of the third wall H are installed on the top of the second wall H in the upper formwork 3. Incorporate.

(9) Once the reinforcing bars have been assembled, the lower formworks 4, which have been separated from the wall H, are fixed to the elevator 2 via the jacks 9, and the elevator 2 is raised to the top of the upper formwork 3. They are stacked and placed symmetrically and rearranged to be used as formwork for pouring concrete for the third wall H (the part shown by the broken line in Figure 1).

(10) Next, insert the separators 11, 11, ... between the center holder jacks 12, 12, ... arranged on the lower formwork 4, 4, which was installed while being fixed to the elevator 2 via the jacks 9. After fixing the two ends by engaging the center holder jacks 12, 12, . . . , concrete is poured inside and hardened.

(11) After building the wall H up to the third stage, release the fixing means 1c of the portal frame 1 from the upper formwork 3 and the lower formwork 4 while keeping the elevator 2 fixed to the lower formworks 4, 4. By driving the motor 7 to rotate the pinion 8 and relatively moving the rack 5 meshing with it upward, the portal frame 1 is raised by one stage.

(12) Thereafter, by sequentially repeating the steps (6) to (11) above, the wall H is successively constructed upward.

Therefore, according to the formwork lifting device of the present invention,
It almost eliminates the need for formwork carpenters, simplifies construction, and improves construction accuracy and wall finish.
The construction period can be shortened, the maximum height of construction can be significantly increased, and the frequency of use of lifting equipment can be reduced.

Next, a second embodiment will be explained using FIG. 3. In this embodiment, the same elements as those in the first embodiment are given the same reference numerals,
The explanation will be omitted.

In this second embodiment, a plurality of upper formworks 3 and lower formworks 4 are arranged horizontally for one portal frame 1 in the first embodiment, and the gate-shaped frame 1 is fixed. A wheel 14 driven by a travel motor (not shown) is retractably attached to the tip of the means 1c, 1c..., and the wheel 14 is made to run on the outer surface of the upper formwork 3 and the lower formwork 4 facing it. Horizontal rails 15, 15 are fixed to each formwork so that they are connected horizontally when the formworks are installed in succession,
The other configurations are completely the same as those of the previous embodiment.

To move this portal frame 1 in the horizontal direction, the elevator 2 fixed to the second stage formwork is released from the formwork, and the stored wheels 14 are set on the rails 15 fixed to the formwork. After that, the traveling motor is driven to move the portal frame 1 together with the elevator 2 to the adjacent formwork core, and then the elevator 2 is fixed to the formwork via the jacks 9.
This is done by keeping the portal frame 1 in a slightly raised state and storing the wheels 14. Furthermore, the movement in the vertical direction is the same as in the first embodiment.

Therefore, the formwork lifting device of this embodiment has the same functions and effects as those of the first embodiment, and is also movable in the horizontal direction, which further simplifies construction and shortens the construction period. As a result, the frequency of use of lifting equipment is reduced, and significant cost reductions can be achieved.

In addition, in the formwork lifting device of the above embodiment,
By setting the stroke of the drive part of the jack 9 to a constant length, it is possible to construct a wall H with a uniform wall thickness, and by arbitrarily adjusting the stroke, it is possible to construct a wall H whose shape and wall thickness change. It can also be used for construction.

"Effect of the invention" As mentioned above, this invention provides an elevator that can be raised and lowered along the vertical member of the portal frame, and an upper formwork and a lower formwork are arranged inside this elevator.
A plurality of center hole jacks for removably fixing the ends of the separators are attached to the upper formwork and the lower formwork, and the elevator is provided with jacks that are detachable by pin connection to the upper formwork and the lower formwork. ,
Since the portal frame is arranged to straddle the wall by detachable fixing means to the upper formwork and the lower formwork, there is almost no need for a formwork carpenter, and construction is simplified. At the same time, the accuracy of construction and the finished surface of the wall are improved, the construction period is shortened, the limit of construction height is significantly increased, and the frequency of use of lifting equipment can be reduced.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, and FIG. 1 is a side view of a formwork lifting device;
FIG. 2 is a front view of a formwork lifting device for constructing a wall, and FIG. 3 is a side view of the formwork lifting device, showing a second embodiment. H...Wall body, 1...Portal frame, 1a...Fixing means, 2...Elevator, 3...Upper formwork, 4...
Lower formwork, 5... Rack, 7... Motor (drive source), 8... Pinion, 9... Jacket, 11...
... Separator, 12 ... Center hole jack, 14 ... Wheel, 15 ... Rail.

Claims (1)

[Claims for Utility Model Registration] (1) A pair of elevators are provided along the vertical members of a pair of gate-shaped frames so that they can be raised and lowered freely, and a pair of upper and lower formworks for constructing a wall inside the elevators. A plurality of center hole jacks are attached to the pair of upper and lower formworks to removably fit separators attached to the pair of upper and lower formworks to maintain them at a constant width. is provided with a removable jack on the upper formwork and the lower formwork by pin connection, and the portal frame is placed across the wall body by means of a removable fixing means on the upper formwork and the lower formwork. A formwork lifting device characterized by: (2) The formwork elevating device according to claim 1, wherein the elevating device is moved up and down by a rack provided on a vertical member and a pinion attached to the elevating device via a drive source. . (3) The portal frame is movable in the horizontal direction along rails fixed to the upper formwork and the lower formwork by wheels retractably attached to the fixing means. A formwork lifting and lowering device according to claim 1 or 2 of the utility model registration claim.