JP3068411B2 - Height adjustment device for temporary structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height adjusting device such as a base jack and a head spindle used for a temporary structure.

[0002]

2. Description of the Related Art Generally, when a floor slab or the like having two or more floors is formed at a construction site or the like, a formwork such as a floor slab on the upper floor is formed by a temporary structure constructed on the ground or a floor slab on the lower floor. I support them. In order to adjust the height of the temporary structure, a base jack arranged at the lower end of the column, a top jack arranged at the upper end of the column, and the like are used.

As shown in FIG. 4, for example, a base jack is inserted into a base 101 placed directly on the ground or via an inclined support, and a sheath tube 102 in the base 101. A screw member 103, an assembly metal fitting 104 fixed to the upper end of the screw member 103, and the screw member 103
And an adjusting spindle 105 which is received at the upper end of the base 101. The adjusting spindle 105 is rotated to rotate the screw member 103.
Moves up and down so that the height from the bottom surface of the base 101 to the top surface of the assembly fitting 104 can be adjusted.

[0004] The top jack is essentially provided with a structure that is upside down of the base jack, and will not be described in detail here.

[0005]

By the way, in order to avoid the trouble of installing or disassembling such a temporary structure over a wide area, for example, the base jack and the top jack are shortened to reduce the trouble. Move to
The height may be readjusted at the destination and used.

In this case, it is necessary to loosen the adjusting spindle 105 from the base 101 side or the bracket side to retreat the screw member 103 into the base 101, but the load acting on the temporary structure is required. Adjustment spindle 10
The female screw of No. 5 and the male screw of the screw member 103 bite, so that the resistance to the rotation becomes remarkably large, and the adjusting spindle 105 cannot be easily loosened.

The present invention has been made in view of the above circumstances, and provides a height adjustment device for a temporary structure which facilitates loosening of an adjustment spindle for adjusting the height of a screw member. The purpose is to do.

[0008]

According to the present invention, there is provided a reference member through which a screw member positioned on an extension of a column of a temporary structure is inserted so as to be able to advance and retreat, and a contact member which is in contact with the upper surface of the reference member and which is fixed to the screw member. And an adjusting spindle screwed so as to be able to advance and retreat, and is applied to a height adjusting device of a temporary structural unit in which the adjusting spindle is rotated around the screw member to adjust the height position of the column. In order to achieve the above object, a wedge which is releasably fitted to a screw member at a position between the reference member and the adjusting spindle so as to be openable and becomes thinner toward the center of the screw member is provided. A wedge member is provided, and a tapered surface corresponding to the wedge is formed on at least one of the reference member and the adjusting spindle.

[0009]

After supporting a heavy object with the temporary structure having the above structure for a predetermined period, when disassembling or lowering the height of the temporary structure, before rotating the adjusting spindle in the loosening direction, The operation of opening the wedge member in the outer peripheral direction of the screw member is performed.

As a result, the wedge and the tapered surface move relative to each other along the surface direction of the abutting surface, and a gap is created between the adjusting spindle and the reference member. Become.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. The temporary structure shown in the side view of FIG. 3 includes a base jack 1, two upper and lower struts 2 and a top jack 3, which are added in order from the bottom on each grid point of a square grid in plan view. The base 4 is incorporated below the base jack 1 or above the top jack 3.

As shown in the half sectional view of FIG. 1, the base jack 1 has a base 5 as a reference member mounted directly on the ground or via an inclined receiving base 4, and a base 5 of the base 5. A screw member 7 inserted through a sheath tube 6 formed therein, an assembly metal fitting 8 fixed to an upper end of the screw member 7, and a female screw screwed to the screw member 7 are provided. An adjusting spindle 9 which comes into contact with the upper surface; and a wedge 19 which is detachably inserted between the base 5 and the adjusting spindle 9 and becomes thinner toward the center of the screw member 7 as described later. And a wedge member 10 on which the
The wedge member 10 and the base 5 are provided with a spindle seat 11 that can be disassembled and disassembled between the wedge member 10 and the base 5.

As shown in the plan view of FIG. 2, the wedge member 10 is connected by a bolt 13 so as to be able to swing open and close, and is fixed in a closed state by another bolt 14 and double nuts 15 and 16. It has members 17 and 18.

A space into which the screw member 7 is inserted is formed between the two closed members 17 and 18, and the inner periphery of the two members 17 and 18 facing the space is provided with a screw member over the entire circumference. A wedge 19 that becomes thinner toward the center of 7 is formed.

The wedge 19 may be formed in a shape that becomes thinner toward the center of the screw member 7.
0 or the lower surface 21 is formed horizontally, and the lower surface 21 or the upper surface 20 on the opposite side is formed as an inclined surface inclined so as to approach the horizontal upper surface 20 or the lower surface 21 toward the center of the screw member 7. However, in order to make the disassembly of the wedge member 10 easier, the upper and lower surfaces 20 and 2 are used here.
1 are formed on inclined surfaces that are inclined so as to approach each other toward the center of the screw member 7.

The spindle seat 11 is divided into a plurality of parts around the screw shaft 7 in the circumferential direction. When the wedge member 10 is closed, the spindle seat 11 is annularly closed by the wedge member 10. Is inserted. In addition, the division number of the spindle seat 11 may be two or more.
In order to minimize an increase in the number of parts, the spindle seat 11 is divided into two parts.

The wedge 19 is provided on the lower surface of the spindle seat 11.
A tapered surface 22 corresponding to the upper surface of the nut 9 is formed, and a concave portion 23 corresponding to the lower portion of the nut 9 is formed on the upper surface. The base seat 12 is divided into a plurality of parts around the screw shaft 7 in the circumferential direction, and is closed annularly by the wedge member 10 when the wedge member 10 is opened and closed. It is inserted.

The number of divisions of the base seat 12 may be two or more. Here, the spindle seat 11 is divided into two parts in order to minimize an increase in the number of parts.
A tapered surface 24 corresponding to the lower surface 21 of the wedge 19 is formed on the upper surface of the base seat 12 as necessary,
The lower surface is formed in a plane received on the upper surface of the base 5.

After adjusting the height from the bottom surface of the base 5 to the upper surface of the mounting bracket 8 by rotating the adjustment spindle 9, the wedge member 1 is inserted between the base 5 and the adjustment spindle 9.
0, the base seat 12 and the spindle seat 11 are incorporated.

When the temporary structure thus constructed supports a heavy object for a predetermined period, the screw member 7
The threads between the screw and the adjusting spindle 9 bite each other. Therefore, before rotating the adjusting spindle 9 in the loosening direction, the double nuts 15 and 16 screwed to the bolts 14 of the wedge member 10 are loosened, and when the wedge member 10 is opened, the wedge 19 and the tapered surface 24 are removed. The two move in the direction of the contact surface, and the spindle seat 11 that supports the lower end surface of the adjusting spindle 9 is lowered, so that a gap is formed below the adjusting spindle 9. Thereby, the frictional force against the force for rotating the adjustment spindle 9 is eliminated, and the adjustment spindle 9 can be easily loosened.

Here, after the opened wedge member 10 is removed from between the base 5 and the adjusting spindle 9, or simultaneously with the removal of the wedge member 10, the base seat 12 and the spindle seat 12 are removed. 11 is disassembled and taken out from between the base 5 and the adjusting spindle 9, a large space is formed between the base 5 and the adjusting spindle 9, so that the adjusting spindle 9 can be more easily released. And the base 5
Can be rotated to lower the height of the vest jack 1.

As shown in FIG. 3, the top jack 3 includes an assembling metal fitting 25 fixed to the upper end of the column 2, a screw member 26 extending upward from the metal fitting 25, and a screw member 26. It has a receiving member 27 inserted so as to be able to advance and retreat, and an adjusting spindle 28 screwed to the screw member 26 between the receiving member 27 and the assembling member 25. The adjusting spindle 28 and the receiving member 27 and the wedge member 10. Further, although not shown in the figure, a spindle seat 11 is provided between the wedge member 10 and the adjusting spindle 28, and a base support is provided between the wedge member 10 and the metal fitting 27 as necessary. A seat 12 is provided.

The top jack 3 fixes the assembling bracket 25 to the upper end of the upper column 2 and then advances and retreats the receiving bracket 27 so that the height from the lower surface of the assembling bracket 25 to the upper surface of the receiving bracket 27 is increased. The screw member 26 and the adjusting spindle 28, the spindle seat 11, the wedge member 10, the base seat 12, and the metal fitting 27 are fixed to each other by performing adjustment and further tightening the adjusting spindle 28 to the metal fitting 27. Is done.

By opening the wedge member 10, the frictional force against the force for rotating the adjusting spindle 28 is eliminated, and the adjusting spindle 28 can be easily loosened. Is removed from between the receiving member 27 and the adjusting spindle 28 or at the same time as the wedge member 10 is removed, the base seat 12 and the spindle receiving seat 11 are disassembled, and the receiving member 27 and the adjusting spindle 28 are removed. When taken out from between, a large space is formed between the metal fitting 27 and the adjustment spindle 28, and the metal fitting 27 can be easily rotated to lower the height of the top jack 3.

As shown in FIG. 3, the adjacent base jacks 1 are composed of a spindle stiffener 29 and a lateral connecting member 30, the adjacent columns 2 are composed of a brace 31 and a lateral connecting member 32, and the adjacent top jacks 3 are composed of two. Are connected to each other by a spindle stiffener 29.

[0026]

As described above, the present invention can be disassembled between a reference member such as a base of a base jack, a receiving member of a head spindle, and an adjustment spindle,
Since the wedge member having the wedge which becomes thinner toward the center of the screw member is provided, it is possible to disassemble the wedge member with the screw member fixed to form a gap between the reference member and the adjustment spindle. By forming this gap, frictional resistance to rotation of the adjusting spindle, the screw member or the reference member can be eliminated, and the screw member can be easily loosened.

[Brief description of the drawings]

FIG. 1 is a half sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of a wedge member of the present invention.

FIG. 3 is a side view of a temporary structure to which an embodiment of the present invention is applied.

FIG. 4 is a half sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base jack 3 Head spindle 5 Base (reference member) 7 Screw member 9 Adjustment spindle 10 Wedge member 24 Tapered surface

Claims (1)

(57) [Claims] 1. A reference member into which a screw member positioned on an extension of a column of a temporary structure is inserted so as to be able to advance and retreat, and is screwed to the screw member so as to be in contact with an upper surface of the reference member and advance and retreat. An adjusting spindle, wherein the adjusting spindle is rotated around the screw member to adjust the height position of the support, wherein the height of the temporary structure is adjusted. A wedge member which is removably fitted to the screw member at the interval position and is provided with a wedge projecting thinner toward the center of the screw member; and the wedge is provided on at least one of the reference member and the adjusting spindle. A height adjusting device for a temporary structure, characterized in that a tapered surface corresponding to (a) is formed.