JPH0211550Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to the jacking of temporary scaffolding supports.

A conventional jack for a temporary scaffolding post is constructed by fixing the lower end of a screw shaft on a seat plate, and screwing a female threaded body having a handle into the screw shaft.
To use it, fit the lower end of the pipe strut from the upper end of the screw shaft, support the lower end of the strut with the female threaded body, and adjust the elevation of the strut by rotating the female threaded body with the handle. There is.

However, when using a jack on a sloped surface such as a roof, if the seat plate is placed directly on the slope, the screw shaft will tilt together with the seat plate, making it unusable. A plate or piece that eliminates the inclination of the seat plate must be interposed between the seat plate and the plate.

Another disadvantage is that it takes time to select a board or piece of appropriate thickness to eliminate the inclination of the seat board.

SUMMARY OF THE INVENTION An object of the present invention is to provide a jack for a temporary scaffolding support that eliminates the above-mentioned drawbacks by rotatably attaching the lower end of a screw shaft to a seat plate.

Next, embodiments of the present invention will be described based on the accompanying drawings.

In the figure, 1 is a seat plate, 2 is a planar U-shaped upright plate provided on the seat board 1, 3 is a pin whose both ends are supported by the parallel part of the upright plate 2, and 4 is a lower end supported by the pin 3. A screw shaft is rotatably mounted, 5 is a female screw body screwed into the screw shaft 4, and 6 is a handle provided at a predetermined position on the outer circumference of the female screw body 5.

When the screw shaft 4 rotates in the direction of the bent portion of the upright plate 2, the bent portion of the upright plate 2 and the outer periphery of the screw shaft 4 come into contact to prevent the screw shaft 4 from falling. .

Next, I will explain how to use the invented jack,
Place the seat plate 1 on the slope of the roof.

Next, while raising the screw shaft 4 that has fallen down on the seat plate 1, the outer periphery of the raised screw shaft 4 is brought into contact with the bent part of the upright plate 2, and after maintaining the screw shaft 4 in the upright state, The lower end of the column 8 is fitted from the upper end of the screw shaft 4, and the lower end of the column 8 is supported on the upper surface of the female screw body 5.

The above-mentioned support column 8 is erected vertically by swinging together with the screw shaft 4 with the pin 3 as the center of rotation.

Further, the raising and lowering of the support column 8 can be adjusted by rotating the female screw body 5 using the handle 6.

As mentioned above, in this invention, the lower end of the screw shaft is rotatably attached to the upright plate of the seat plate via a pin, so even when the seat plate is placed on an inclined surface, the screw shaft can be erected vertically. This eliminates the need for a plate or piece to be interposed between the seat plate and the lower side of the inclined surface.

Also, tilt the screw shaft to the opposite side of the bent part of the upright plate,
Since the screw shaft on the seat plate can be folded, the volume can be reduced.

In particular, by using a planar U-shaped upright plate, the screw shaft rotated in the direction of falling comes into contact with the bent portion of the upright plate, thereby making it possible to maintain the upright state of the screw shaft.

Therefore, when fitting the lower end of the column onto the screw shaft,
There is no need to take the trouble of holding the screw shaft one by one to prevent the screw shaft from collapsing, and the fitting work becomes easier.

[Brief explanation of the drawing]

FIG. 1 is a side view of the jack of the present invention, and FIG. 2 is a plan view. 1... Seat board, 2... Standing board, 3... Pin, 4...
...screw shaft, 5...female screw body, 6...handle.

Claims (1)

[Scope of utility model registration request] a seat plate, a planar U-shaped upright plate provided on the upper surface of the seat plate, a pin whose both ends are supported by parallel parts of the upright plate, and a screw shaft whose lower end is rotatably supported by the pin; A jack for a temporary scaffolding support comprising a female screw body with a handle screwed into the screw shaft, and preventing the screw shaft from falling due to contact between the bent part of the upright plate and the outer periphery of the screw shaft.