JP2851260B2 - Height stage height adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for performing a construction work at a high position, for example, by using a construction work machine installed on a work stage at an upper end of a scaffold formed by assembling a plurality of columns. The present invention relates to a height-adjusting device for a high-level stage for easily adjusting the height of a stage.

[0002]

2. Description of the Related Art Conventionally, for example, construction work in a high position
As shown in FIGS. 4 to 6, this is performed using a scaffold formed by assembling a large number of columns.

[0003] Referring to the drawings, reference numeral 1 denotes a tubular column fixed to an upper end of a base jack 4 having a lower end fastened to an H-shaped steel 2 laid horizontally and fixed by a chuck member 3, and four standing columns. Are connected by a horizontal joint member 5 and an oblique brace 6, and are assembled as one unit. The base jack 4 is provided with the H-shaped steel 2.
Spherical washer 7 at the lower end which is fastened by chuck member 3
A male screw shaft 8 whose lower end is pivotally connected to the spherical washer 7 and faces in the vertical direction, a handle 9 fixed to the lower end of the male screw shaft 8 immediately above the spherical washer 7, and an upper end of the male screw shaft 8 are screwed. It comprises a nut member 10 and a joint fitting 11 at the lower end of the column 1 and a joint fitting 12 at the upper end joined by bolts and nuts.

[0004] A joint fitting 13 is provided at the upper end of each of the columns 1, and the joint fitting 13 is joined to a joint fitting 15 at the lower end of the head spindle 14 by bolts and nuts. The head spindle 14 has a vertically oriented male screw shaft 16 whose lower end fits into a lower end fitting 15, a handle 18 mounted on a receiving seat 17 on the fitting 15 and rotatably screwed to the male screw shaft 16, and The head 19 is fixed to the upper end of the male screw shaft 16. A large number of such units are arranged side by side, and a work stage 20 is formed on the head portion 19, and a work stage
Work such as carrying heavy objects such as construction work machines on top of 20, or setting a formwork on stage 20 and placing concrete for floor formation, etc. Has become.

The height of the work stage 20 is adjusted by hitting a handle 18 screwed to the male screw shaft 16 of the head spindle 14 of each column 1 with a hammer or the like and turning it clockwise or counterclockwise. This is performed by vertically moving the male screw shaft 16 on which a larger load is applied without rotating together. Similarly, by hitting the handle 9 of the base jack 4 of each support 1 with a hammer or the like and turning it clockwise or counterclockwise, the male screw shaft 8 rotates and fine adjustment of the height of the work stage 20 is performed. .

[0006]

However, the operation of adjusting the height by hitting the handle 18 with a hammer or the like to adjust the height of the work stage 20 requires a large amount of several tens tons over the male screw shaft 16 from above. In many cases, a load is applied, and the handle 18 does not easily move with respect to the male screw shaft 16, requiring a very large force.

The present invention solves such a problem, and does not require the operation of hitting a handle with a hammer or the like to adjust the height of a high place stage for performing work or the like.
It is intended to be very easy and safe to do.

[0008]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a fitting which is provided on an upper end of a tubular support which is erected to constitute a high-stage, and which is provided on a head spindle. The head spindle is joined to the lower end fitting by bolts and nuts, and the head spindle has a vertically oriented male screw shaft whose lower end fits into the lower end fitting, and a handle mounted on the seat on the fitting and screwed to the male screw shaft. A head portion fixed to an upper end of the male screw shaft, and a bracket detachable from a lower end of the head spindle. The bracket is externally fitted to the male screw shaft of the head spindle and has a lower portion of the handle. A first bevel gear having an engagement piece engaged with the operation arm portion, and a second bevel gear having a rotation axis orthogonal to the rotation axis of the first bevel gear and meshing with the first bevel gear. Provided, it is an Abstract that said second first bevel gear by a bevel gear is driven by a motor is configured to rotate the rotating handle. Further, the present invention provides a first bevel gear, wherein the first bevel gear has a large gear portion having an opening having a width larger than the outer diameter of the external thread shaft, and a small gear which is fitted so as to close the opening and can be detachably attached to the large gear portion with a bolt. The gist of the present invention consists of a gear section and a gear section.

According to this configuration, the height of the high-stage stage for performing work or the like can be adjusted very much by rotating the bevel gear by rotating the bevel gear with a motor without requiring the work of hitting the handle with a hammer or the like. It can be done easily and safely. Further, by removing the small gear portion from the opening, the first bevel gear can be easily mounted on and dismounted from the handle of the head spindle.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings (FIGS. 1 to 3). In the drawings, the same reference numerals as those in the conventional example denote the same members, and a detailed description thereof will be omitted.

Reference numeral 21 denotes a fitting at the lower end of the head spindle 14.
15 is a bracket detachably attached to a projecting piece 22 projecting laterally from above. The bracket 21 is externally fitted to the male screw shaft 16 and is provided at the lower portion with an engaging piece engaged with the operating arm 18a of the handle 18. A bevel gear 23 having a bevel gear 23a, and a bevel gear 24 whose rotation axis is orthogonal to the rotation axis of the bevel gear 23 and meshes with the bevel gear 23 are provided. 23 rotates to rotate the handle 18. Reference numeral 26 denotes a support portion provided integrally with the bracket 21 to rotatably support the bevel gear 23, 27 denotes a bearing portion provided on the bracket 21 to rotatably support the bevel gear 24, and 24a denotes A square hole at the center of the bevel gear 24, and the rotating shaft of the motor 25 is
The angular shaft portion 28a of the tip 28 engages so that the rotation of the motor 25 is transmitted to the bevel gear 24. Note that the bevel gear 23 has a large gear portion 29 having an opening 29a having a width larger than the outer diameter of the male screw shaft 16, and is fitted into the large gear portion 29 by a bolt 30 so as to close the opening 29a. Flexible small gear part 31
By detaching the small gear 31 from the opening 29a, the bevel gear 23 can be easily mounted on and removed from the handle 18 of the head spindle 14.

Accordingly, the bracket 21 is attached to the projecting piece 22 of the head spindle 14, the bevel gear 23 is positioned on the handle 18 and the bevel gear 24 is rotated by the motor 25, whereby the bevel gear 23 is rotated. The handle 18 can be rotated rightward or leftward. As a result, the male screw shaft 16 on which a larger load is applied can be moved up and down without co-rotating, and the height of the work stage 20 can be adjusted. The height adjustment of the work stage 20 may be performed for each support,
Alternatively, brackets 21 may be attached to all four columns constituting one unit, and bevel gears 23 and 24 may be set so that male screw shafts 16 of the four columns are simultaneously moved up and down.

The other structure is the same as that of the conventional example.
The detailed description is omitted. In the above-described embodiment, the bracket 21 is attached to the projecting piece 22 of the head spindle 14 to move the male screw shaft 16 of the head spindle 14 up and down, and the bevel gear 23 is positioned on the handle 18. Although the bevel gear 24 is rotated by the motor 25, a similar mechanism may be employed to move the male screw shaft 8 of the base jack 4 up and down.

[0014]

As described above, according to the present invention, it is possible to adjust the height of a high place stage for performing work and the like by rotating a bevel gear by a motor without having to hit the handle with a hammer or the like. It is very easy and safe to rotate the handle. Further, by removing the small gear portion from the opening, the first bevel gear can be easily mounted on and dismounted from the handle of the head spindle.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a bevel gear of a height adjusting device according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part showing a state where a bevel gear is attached to the head spindle unit.

FIG. 3 is an enlarged perspective view of a main part showing a state in which a bevel gear is attached to the head spindle unit.

FIG. 4 is a perspective view of a scaffold in a conventional example.

FIG. 5 is an enlarged front view of the base jack portion.

FIG. 6 is an enlarged front view of the head spindle unit.

[Explanation of symbols]

 14 Head spindle 15 Joint fitting 16 Male screw shaft 17 Receiving seat 18 Handle 18a Operating arm 20 Working stage 21 Bracket 22 Projection piece 23 Bevel gear 23a Engagement piece 24 Bevel gear 25 Motor 29 Large gear part 29a Opening 30 Bolt 31 Small gear Department

Claims (2)

(57) [Claims] 1. A joint fitting is provided at an upper end of a tubular support that is erected to constitute a high-stage, and the joint fitting is joined to a joint fitting at a lower end of a head spindle by bolts and nuts. A male screw shaft that is vertically oriented so that the lower end fits into the lower end fitting, a handle mounted on a seat on the fitting and screwed to the male screw shaft, and a head portion fixed to the upper end of the male screw shaft. And
A first bevel gear having a bracket detachably attached to a lower end of the head spindle, the bracket having an engagement piece externally fitted to a male screw shaft of the head spindle and a lower engagement portion with an operation arm of the handle; And a second bevel gear whose rotation axis is orthogonal to the rotation axis of the first bevel gear and meshes with the first bevel gear, and the second bevel gear is driven by a motor. A height adjusting device for a high-altitude stage, wherein one bevel gear rotates to rotate the handle. 2. The first bevel gear has a large gear portion having an opening having a width larger than the outer diameter of the male screw shaft, and a small gear that is fitted so as to close the opening and can be detachably attached to the large gear portion with a bolt. 2. The height adjusting device according to claim 1, further comprising a gear portion.