JP2000087552A - Jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To erect a horizontal member at the arbitrary position of a screw lever and contrive the stabilization of a frame folding and a timbering by vertically movably screwing a nut on the outer periphery of the screw lever and providing one or a plurality of attaching members on the outer periphery of the nut. SOLUTION: A jack 11 comprises a nut 13 vertically movably screwed on a screw lever 12 and an attaching member 14 provided on the outer periphery of the nut 13. A base plate 23 is fixed to insert the lower part of a support 15 on the upper part of the screw lever 12 so as to rotate the nut 25, and vertically moved to adjust the height of the support 15. The shoe 29 of the end of a horizontal member 18 is inserted in the flange 26 of the attaching member 14, a wedge 30 is inserted in the shoe 29 and the flange 26 to be detachably connected, and the attaching position of the horizontal member 18 can be arbitrarily adjusted. Thereby the horizontal member 18 can be erected near the end of the screw lever 12, i.e., the load receiving point of a structure which the jack 11 itself carries, the occurrence of the sliding, deformation and torsion of the support 15 inserted in the screw lever 12 is prevented and the stabilization of a frame scaffolding and a timbering can be contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw type jack provided at the lower end of a framed scaffold to adjust the height while supporting the framed scaffold, or provided at the lower and upper ends of a shoring while supporting the shoring. The present invention relates to a screw jack for adjusting the height or adjusting the height and adjusting the height supported by a supporter.

[0002]

2. Description of the Related Art In general, in a scaffold for construction and civil engineering, a screw jack is provided at a lower end of the scaffold to adjust the height of the scaffold while supporting a pipe support constituting the scaffold.

[0003] Similarly, in the construction and civil engineering work sites, the above-mentioned heavy materials are supported by joists, joists, etc.
Screw jacks are provided at the upper and lower ends of this support, and the upper jack supports the pull and adjusts the height of the pull, while the lower jack supports the pipe struts that constitute the support, and Adjusting the height.

For example, as shown in FIG. 6, the conventional screw type jack 1 includes a base plate 2, a screw rod 3 erected at the center of the base plate 2, and a nut screwed on the outer periphery of the screw rod 3 so as to be vertically movable. 4 and a handle 5 for rotation operation provided on the outer periphery of the nut 4.

[0005] When the jack 1 is installed at the lower end of a column 6 constituting a framed scaffold or a shoring, for example, the base plate 2 is fixed to a ground base 7 with a stopper 8 and inserted into the upper part of the screw rod 3. The lower end of the column 6 is carried on the upper surface of the nut 4, and the height of the column 6 is adjusted by rotating the nut 4 with the handle 5.

On the other hand, in the case of a framed scaffold or a shoring, a load from above acts on each of the columns 6, and the load may cause the columns 6 to slide alone or as a whole in the lateral direction or to be deformed by an unbalanced load. In order to prevent these problems, the columns 6, 6 are supported by the horizontal members 9.

In the case where the horizontal members 9 are installed between the columns 6, 6, the clamps 10 are attached to the lower portions of the columns 6, 6, and the horizontal members 9 are mounted laterally via the clamps 10. .

[0008]

Although the above conventional jacks are not functionally defective, the following improvements are desired.

First, in order to regulate and stabilize the movement of the pillars 6 constituting the framework scaffolding and the shoring, the erection position of the horizontal member 9 is preferably as close to the ground as the load receiving point as possible.
Therefore, the horizontal member 9 is a screw rod 3 further below the lower part of the column 6.
It is more preferable to mount it below.

However, the diameter of the clamp 10 is usually
Is generally formed corresponding to the outer diameter of the screw rod 3 and is not adapted to the outer diameter of the screw rod 3.
At present, it is impossible to attach the transverse member 9 to the screw rod 3 through the support rod 0, and it is inevitable to attach the transverse member 9 to the column 6 as shown in FIG. ing.

Second, even when the horizontal member 9 is mounted on the column 6 via the clamp 10, the mounting portion of the horizontal member 9 of the clamp 10 protrudes outward from the outer surface of the column 6. The shaft 6 and the shaft 9 are not orthogonal to each other, and there is a possibility that the column 6 and the transverse member 9 may be distorted or deformed when an eccentric load is applied.

Therefore, an object of the present invention is to allow a horizontal member to be installed at an arbitrary position on a screw rod, and to make the axis of the horizontal member orthogonal to the screw rod and the axis of a support inserted into the screw rod. Is to provide a jack like that.

[0013]

In order to achieve the above object, the present invention provides a screw rod, a nut screwed on the outer periphery of the screw rod so as to be vertically movable, and a nut provided on the outer periphery of the nut. Or, it comprises a plurality of attachment members.

In this case, it is preferable that the mounting member is formed of a disk-shaped flange having a large number of mounting holes or annular dovetails formed along the circumferential direction.

[0015] Similarly, the mounting member may comprise a plurality of sockets spaced along the circumferential direction.

Further, it is preferable that a handle is provided on the outer periphery of the mounting member in a horizontal direction.

In the above case, a base plate is provided at the lower end of the screw rod, and a positioning nut for adjusting the height of a pipe post inserted above the screw rod is screwed on the upper part of the screw rod so as to be vertically movable. Is preferred.

Similarly, a large catch is provided at the upper end of the threaded rod, and a positioning nut for adjusting the height of the threaded rod with respect to the pipe post inserted below the threaded rod is screwed to the lower part of the threaded rod so as to be vertically movable. You may make it.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a jack according to an embodiment of the present invention, and FIG. 2 shows another embodiment of the present invention. Both of them have the same basic form.

The jacks 11 and 21 shown in FIGS. 1 and 2 are each composed of a screw rod 12, a nut 13 screwed to the screw rod 12 so as to be vertically movable, and a porous disc-shaped flange provided on the outer periphery of the nut 13. Both are common in that they are constituted by the member 14.

The jack 11 shown in FIG. 1 is disposed at the lower end of the support A as shown in FIG. 3, and the jack 21 shown in FIG.
Is disposed at the upper end of the shoring A also shown in FIG.

The jack 11 of FIG. 1 may be provided, for example, at the lower end of a column or other similar structure constituting a framework scaffold.

The support A shown in FIG. 3 is composed of a plurality of pillars 15,...
It is composed of frame members 16 and 17, which are horizontal members connecting the comrades,
The lower end of each support 15 is inserted into the lower jack 11 so as to be adjustable in height, and the upper jack 21 is similarly inserted into the upper end of each support 15 so as to be adjustable in height.

A horizontal member 18 made of a pipe or the like is erected and reinforced between the adjacent lower jacks 11 to prevent the columns 15 from slipping, and the columns 15 are deformed even when subjected to an uneven load. Or warping.

A horizontal member 19 made of a pipe, which is also a horizontal member or a diagonal member, is erected between the upper jacks 21 to reinforce the columns 15.

The upper jack 21 has a large support 20 at an upper end, and the large support 20 supports the large support 21.
The load from the structure 22 is carried via the large receiving member 20.

In the jack 11 shown in FIG. 1, a base plate 23 is provided at a lower end of the screw rod 12, and a positioning nut 25 having a handle 24 is screwed on the upper part of the screw rod 12.

The base plate 23 is fixed on the ground or on a base provided on the ground as shown in FIG. 3 is inserted into the upper part of the screw rod 12, and the nut 25 is rotated by operating the handle 24 to move the nut 25 in the vertical direction. Is adjusted to regulate its position.

The mounting member 14 has a disc-shaped flange 14 and a flange 14 as in the other embodiments shown in FIG.
And a number of mounting holes 27 formed along the circumferential direction. Although a handle is not attached to the flange 14 in FIG. 1, a handle 28 is provided on the outer periphery of the flange 26 in the horizontal direction in the other embodiment of FIG. 4, and the flange 26 is rotated through the handle 28. While moving the flange 28 up and down to an arbitrary height.

In the case of the flange 26 shown in FIG. 1, the height is adjusted by directly rotating the flange 26.

The horizontal member 18 has a bifurcated shoe 29 at its end.
And a wedge 30 inserted into a vertical hole of the shoe 29.
After the shoe 29 is inserted into the flange 26, the wedge 30 is inserted into the hole of the shoe 29 and the mounting hole 27 of the flange 26.
The transverse member 18 is detachably connected to the flange 26 by being inserted.

A jack 21 according to another embodiment shown in FIG. 2 has a bifurcated large support 20 at the upper end of the screw rod 12 and a handle 24 at the lower part of the screw rod 12 as described above. The positioning nut 25 is screwed up and down freely.

The lower part of the screw rod 12 is inserted into the upper end of the column 15 as shown in FIG.
The height of the screw rod 12, that is, the height of the jack 21 is adjusted by moving the positioning nut 25 up and down while abutting on the upper end of the positioning nut 25 to perform positioning.

At the end of the horizontal member 19 as a diagonal member, a shoe 2
Nine mounting portions 29 a are swingably coupled via pins 31, and the shoe 29 is removably mounted on the flange 26. Attachment member 14 consisting of flange 26 and shoe 2
The structures of 9 and wedge 30 are the same as those shown in FIG. A handle 28 may be provided on the flange 26 as in FIG.

The flange 26 shown in FIGS. 1, 2 and 4 has a large number of mounting holes 27. Instead of the mounting holes 27, an annular dovetail groove may be provided. In this case, the horizontal member 1
For the ends of 8, 19, claws or the like to be hooked on the dovetail are used.

FIG. 5 relates to another embodiment of the present invention, in which a socket 32 is used as the mounting member 14.

That is, a plurality of, for example, four, cylindrical sockets 32 are provided along the circumferential direction with notches 33 provided on the outer periphery of the nut 13. In this case, a wedge-shaped claw or other hooking member 34 that is removably inserted into the socket 32 is provided at the end of the horizontal member 18.

The other structures and operations are the same as those shown in FIGS.

[0040]

According to the present invention, the following effects can be obtained.

According to the invention of each claim port, the nut is screwed into the screw rod and the nut is provided with the mounting member, so that the horizontal member can be mounted via the mounting member. For this reason, the mounting position of the horizontal member can be adjusted arbitrarily by moving the nut up and down, and the horizontal member can be installed near the end of the screw rod, in other words, near the load receiving point of the structure carried by the jack itself. Thereby, the occurrence of slippage, deformation and torsion of the post inserted into the screw rod is more reliably prevented, and stabilization of the framed scaffolding and support work assembled by the post can be achieved.

Similarly, since the horizontal member can be connected to the nut via the mounting member, the axis of the horizontal member is orthogonal to the axis of the nut, that is, the axis of the screw rod and the post inserted into the screw rod. A good balance between the columns and the horizontal members is provided, and the framework scaffolding and support work can be stabilized.

[Brief description of the drawings]

FIG. 1 is a front view of a jack according to an embodiment of the present invention.

FIG. 2 is a front view of a jack according to another embodiment.

FIG. 3 is a front view of a shoring using the jack of FIGS. 1 and 2;

FIG. 4 is a perspective view of a jack according to another embodiment.

FIG. 5 is a perspective view of a jack according to another embodiment.

FIG. 6 is a front view of a conventional jack.

FIG. 7 is a plan view of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Screw rod 13 Nut 14 Mounting member 15 Prop 20 Large support 23 Base plate 25 Positioning nut 26 Flange 27 Mounting hole 28 Handle 32 Socket

Claims (6)

[Claims] 1. A jack comprising: a screw rod; a nut screwed on the outer periphery of the screw rod so as to be vertically movable; and one or more attachment members provided on the outer periphery of the nut. 2. The jack according to claim 1, wherein the mounting member comprises a disk-shaped flange having a plurality of mounting holes or an annular dovetail along a circumferential direction. 3. The jack according to claim 1, wherein the mounting member comprises a plurality of sockets spaced along the circumferential direction. 4. The jack according to claim 1, wherein a handle is provided on an outer periphery of the mounting member in a horizontal direction. 5. A base plate is provided at a lower end of the screw rod, and a positioning nut for adjusting the height of a pipe post inserted above the screw rod is screwed on the upper part of the screw rod so as to be vertically movable. Clause 1, 2, 3, or 4 jack. 6. A large receiving member is provided at an upper end of the screw rod, and a positioning nut for adjusting a height of the screw rod with respect to a pipe post inserted below the screw rod is screwed to a lower part of the screw rod so as to be vertically movable. 5. The jack of claim 1, 2, 3, or 4, wherein: