JPS5930129Y2 - Yoke structure of formwork sliding mechanism - Google Patents

Description

[Detailed description of the invention] This invention is a device for constructing cylindrical or tower-shaped structures such as silos, chimneys, and cooling towers using the so-called sliding casting method, in which concrete is poured while sliding the formwork upward. This relates to the yoke structure of the invention.

A conventional slidable formwork support mechanism is shown in FIG.

In the figure, 1 is a horizontal beam, 2 is an upper yoke whose position can be adjusted in the longitudinal direction (radial direction of the structure) along this horizontal beam 1, and 3 is a lower yoke that is pivotally supported by this upper yoke 2. 4 is a formwork supported by this lower yoke 3.

A diameter adjustment mechanism 5 is provided at the horizontal beam 1, a wall thickness adjustment mechanism 6 is provided at the upper yoke 2, and a wall thickness adjustment mechanism 7 is provided between the upper yoke 2 and the lower yoke 3. Concrete is poured into the formwork 4 whose dimensions have been adjusted to predetermined dimensions by the adjustment mechanisms 5, 6.7, and the concrete wall 8 is formed.

However, in such a yoke structure, the mechanisms 5 and 6 for diameter adjustment and wall thickness adjustment have many frictional parts and require a large adjustment force.

Moreover, since the inclination adjustment and wall thickness adjustment are performed above the concrete surface, the adjustment force is F as shown in Figure 2.

If you add concrete reaction force, a large amount of force will be required for adjustment.

Furthermore, since the wall thickness is adjusted by pushing the concrete wall diagonally, the force F1 is divided into an effective component Fla and an inactive component Fib, resulting in waste, as shown in FIG.

Furthermore, since the diameter is adjusted at a single point at the top, as shown in Figure 4, when the adjustment force F2 is applied, a moment M1 is generated and rotation occurs, which impedes smooth operation. In addition, when using this standard beam method, a jack (not shown) that is installed between the formwork 4 and slides the entire formwork device is required (the rod is also similar). ) does not match the slope of the conch notebook wall, which may put strain on the rod.

This invention aims to eliminate the above-mentioned drawbacks and provide a yoke structure for a formwork sliding mechanism that allows smooth adjustment of inclination, wall thickness, etc.

This invention will be explained below based on the illustrated embodiments.

Figures 5 to 10 show an example of this invention.
11 is a vertical yoke, two of which are arranged in parallel.

12 is a member connecting the upper ends of the two vertical yokes 11;
Reference numeral 13 denotes a horizontal member that connects a predetermined point in the middle of the two vertical yokes 11 and serves as a jack receiver. Each member 12, 13 and the two vertical yokes 11 form a parallelogram. A wall inclination adjustment bolt 14 is disposed on one diagonal line.

The connection points between each member 12, 13 and the vertical yoke 11 have a rotatable connection structure, and as shown in Figs. 15 and nut 16 are used.

The length 11 of the block 15a is set equal to the width of the vertical yoke 11, and a through hole 15C through which the bolt 14 is inserted is formed in the middle part.

This penetration 7L15c is unnecessary for the member 15a at the other diagonal connection point.

As shown in FIG. 9, the wall inclination adjustment bolt 14 has a hole 14a in its middle portion for inserting the rod 17, and nuts 18 are screwed into threaded portions on both sides of the hole 14a.

Due to this nut 18. By adjusting the length of the diagonal, the inclination of the vertical yoke 11, ie, the wall inclination, is stabilized.

Reference numeral 19 denotes a formwork, and 20 stands for a formwork support rod that stands perpendicular to the outer surface of the formwork 19, and as shown in FIG. It is inserted through, and a rack is engraved on its side.

The rack is installed inside the lower half of the yoke 11 in the longitudinal direction of the yoke, and meshes with a pinion provided on a transmission shaft 22 which is rotatably supported at both ends.

A worm 23 that applies rotational force is meshed with the transmission shaft 22, and the rotational movement of the worm 23 is exchanged via the transmission shaft 22 to the linear movement of the formwork support rod 20, thereby adjusting the wall thickness. It is about to take place.

The yoke structure according to this invention is as described above,
The jacks 25, rods 17, formwork 19, etc. all have the same slope as the wall, and the structure 2 attached to the horizontal member 13
No unreasonable force will be applied to 4.

Further, the shirt 1i-25 and the rod 17 are inclined at the same angle as the wall, and when the jack 25 is raised, the force F3 is applied to the entire yoke frame without difficulty as shown in FIG. 11, resulting in a smooth sliding operation.

In this regard, conventionally, the upward direction of the jack is the B direction, and each direction is moved in the C direction by a separate mechanism, which causes strain.

Furthermore, since wall thickness adjustment can be performed with the minimum force by applying force in the direction perpendicular to the wall (see Figure 12), unlike conventional methods in which force is applied in the direction F, where an inactive component E occurs, adjustment is possible. Adjustments can be made smoothly and easily, such as by making the force 100% effective.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the formwork support structure of a conventional formwork slide mechanism, Figs. A sectional view showing one embodiment of the yoke structure of the formwork slide mechanism according to the invention, FIG. 6 is a plan view thereof, FIG. 7 is a front view of the connecting portion, FIG. 8 is a side view of the connecting shaft, and FIG. 9 is a plan view of the wall inclination adjustment bolt, FIG. 10 is an explanatory diagram of the structure of the wall thickness adjustment mechanism, and FIG.
1 and 12 are vector diagrams for explaining the operation. 11... Vertical yoke, 12... Connecting member, 13... Jacket is horizontal member, 14...
...Wall inclination adjustment bolt, 15...Connection shaft, 16
．． 18...Natsuto, 17...Rod,
19...Formwork, 20...Formwork support rod,
21... Guide hole, 22... Transmission shaft, 23... Worm, 24... Concrete wall (structure), 25...・Jyatsuki.

Claims (1)

[Scope of utility model registration request] In a device for constructing a cylindrical or tower-shaped structure by pouring concrete while sliding the formwork upwards, it is used between the upper ends of two parallel vertical yokes and between a predetermined point in the middle. The connecting member and the jack receiver are provided with horizontal members so as to form a parallelogram, and each connecting point has a rotatable connecting structure, and has a rod through hole in the middle part on one diagonal, In addition, a wall inclination adjustment bolt is provided, into which a nut for adjusting the inclination of the vertical yoke is screwed, and a wall inclination adjustment bolt is inserted into the lower half of the vertical yoke so as to be perpendicular to the formwork. A yoke structure for a formwork slide mechanism, characterized in that a formwork support mechanism is provided, a transmission shaft that advances and retreats the support rod via a rack and a pinion, and a worm that applies rotational force to the shaft.