JPH0664813U - Formwork equipment for PC stairs - Google Patents

Abstract

(57) [Abstract] [Purpose] The adjustment of the formwork is easy, the PC stairs can be manufactured quickly, and the formwork cost is reduced. [Structure] The PC staircase formwork 6 is supported on the base 1 by turnbuckles 3, 4, 5. PC stair formwork 6
Is the upper landing form 7, the lower landing form 8, and the ends of the upper landing form and the lower landing form and the pins 10 and 1 at both ends.
1 and the step form 9 connected to each other. The upper landing form 7 and the lower landing form 8 are such that the pins 10 and 11 are the swing centers of the step form 9, respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a formwork device for a PC (precast concrete) staircase having both upper and lower landings.

[0002]

[Prior art]

 In the past, when manufacturing PC stairs, when the treads, rises and floor heights of the stairs were different, the actual situation was to adjust the formwork to the floor height etc. each time.

[0003]

[Problems to be solved by the device]

 According to the conventional example, there is a problem that the cost of the formwork becomes high because it takes a lot of time and labor for adjustment, it takes a lot of days to manufacture, and a plurality of formworks are required.

It is an object of the present invention to provide a PC stair formwork device that allows easy adjustment of the formwork, enables rapid manufacturing, and reduces the cost of the formwork.

[0005]

[Means for Solving the Problems]

 This PC stair formwork device consists of a base, a length-adjustable formwork support attached to this base, and a PC staircase formwork supported by this formwork support. is there. The PC staircase formwork is composed of an upper landing formwork, a lower landing formwork and a step formwork. The upper landform formwork and the lower landing formwork are located on both ends of the step formwork, and are connected to both ends of the stepwork form by pins with the pin as the swing center. The upper landform formwork and the lower landing formwork are supported at their bottoms by the formwork support. As the mold supporting portion, a supporting member such as a turnbuckle and a cylinder whose length can be adjusted is used.

[0006]

[Action]

 By changing the length of the form support part, one or both of the upper landform formwork and the lower landing formwork are appropriately swung about the pins to match the floor height.

[0007]

【Example】

 In FIG. 1, a support frame 2 is erected on one side (right side) on a base 1, and an angle 21 is attached inside the support frame. A turnbuckle 3 whose length can be adjusted obliquely upward from this angle is attached by a pin 31. A turnbuckle 4 and a turnbuckle 5 are attached to the left side of the base 1 in parallel with the turnbuckle 3 by pins 41 and 51, respectively. These turnbuckles 3, 4 and 5 respectively support the bottom portions on both sides of the PC stair formwork 6.

The PC staircase formwork 6 is composed of an upper landing formwork 7, a lower landing formwork 8 and a step part formwork 9 that connects both upper and lower landing formwork, and is bent into an S-shape in the figure. Has been done. The upper end side bottom of the upper landing form 7 that is inclined to the upper right of the figure is supported by the upper end of the turnbuckle 3 that is connected via a pin 32. The bottom end of the upper landing form 7 is also connected to the step form 9 by a turnbuckle 12. The lower landing formwork 8 which is inclined to the left in the figure is supported by the upper ends of turnbuckles 4 and 5, which are connected to both sides at the bottom via pins 42 and 52, respectively.

The step form 9 is formed in a shape corresponding to the tread surface and the kick-up, that is, a sawtooth shape on the bottom side.

Explaining the relationship between the upper and lower landform forms 7 and 8 and the step form 9, the upper and lower landform forms are arranged on both sides of the step form. The upper landing form 7 and the lower landing form 8 and the step form 9 are connected by pins 10, 10a, 11, 11a. That is, the upper and lower ends of the side plate 71 of the upper landing mold 7 are connected to the upper and lower ends of the side plate 91 of the step form 9 at the upper and lower ends of the side plate 91 by the pins 10 and 10a. In order that the side plate 91 of the step form 9 can swing smoothly about the pin 10, the end of the side plate is formed in an arc shape and the pin 10a is movable.

Similar to the above, the upper and lower ends of the other end of the step form side plate 91 are connected to the upper and lower ends of the side plate 81 of the lower landing form 8 by pins 11 and 11a. The upper end of the side plate 81 of the lower landing form 8 is formed in an arc shape so that the side plate can smoothly swing about the pin 11. The pin 11a is movable.

Next, in order to form the PC stairs, one or both of the slopes of the upper or lower landing formwork 7, 8 is preliminarily set in order to match the height of the PC stairs, for example. By adjusting the length of 4,5, after moving the landing form 7, 8 from the position of the chain line in Figure 1 to the position of the solid line, concrete is placed in the PC stair form 6, If the mold is removed after curing, the PC stairs S as shown in FIG. 2 is formed.

The PC staircase Sa shown by the chain line in FIG. 2 is an example having a higher floor height than the PC staircase S, and is formed by adjusting the upper landform form 7.

[0014]

[Effect of device]

 According to this invention, since the landform formwork and the step formwork are swingably connected by the pins, the PC stairs can be manufactured by one formwork device even if the floor height, the tread, and the rise are different. Therefore, the cost of the formwork is reduced, and the landing formwork can be adjusted according to the height of the floor, etc. Therefore, the adjustment can be performed less laboriously than the conventional example, and the production can be performed quickly.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing a usage state.

FIG. 2 is an enlarged sectional view of a PC staircase.

[Explanation of symbols] 1 base 2 support part 3 turnbuckle 4 turnbuckle 5 turnbuckle 6 PC stair form 7 upper upper land form 8 lower land form 9 9 step form 10 pin 11 pin S PC stair Sa PC stair

Claims (1)

[Scope of utility model registration request] 1. A PC staircase formwork comprising a base, a length-adjustable formwork support attached to the base, and a PC staircase formwork supported by the formwork support. Consists of an upper landing form and a lower landing form, and a step form connected at both ends with pins to the ends of the upper landing form and the lower landing form respectively. The mold device for a PC staircase, wherein the mold and the lower landing mold have the above-mentioned pins as swing centers with respect to the step mold.