JPH0618963Y2 - Floor board support device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a floor board support for laying floor boards (panels) at a distance from the floor surface of a building for wiring under a floor board in a computer room, for example. Regarding the device.

[Conventional technology]

Generally, a jack is used as a means for supporting the floor board apart from the concrete floor surface. However, various heights are required for the distance between the floor surface and the floor board depending on the purpose. For example, there is a change of 30 mm to 220 mm. Further, since the floor surface has unevenness, it is difficult to adjust this height with one jack. Therefore, it is necessary to prepare various types of jacks having different heights.

The jack is generally made of synthetic resin,
Therefore, in manufacturing many types of jacks, correspondingly many types of molds are required, and in addition, many types of inventory are required, and there is a problem in inventory management.

For this reason, the present inventor has proposed a floor board support device having a large adjustment range (Actual Kaihei No. 1-163633). The outline is shown in FIG. The floor plate support device 50 includes a base 51 having a support cylinder 52, a cylindrical intermediate shaft 54 screwed into the support cylinder 52, and a floor plate support shaft 55 that supports the floor plate P. 53
Is a floor plate attached to the floor surface F, and 56 is a receiving plate that supports the frame R that attaches and supports the floor plate P.

As a result, the adjusting height of the receiving plate 56 is set to the supporting cylinder 5 of the intermediate shaft 54.
The sum of the ascending / descending height with respect to 2 and the ascending / descending height of the floor plate support shaft 55 with respect to the intermediate shaft 54 increases the adjustment range. Therefore, it is possible to reduce the number of types to be prepared.

[Problems to be solved by the device]

When the intermediate shaft 54 and the floor plate support shaft 55 are raised, the remaining screwing length is unknown, and sometimes the remaining screwing length is so small that the strength is insufficient, or there is a problem such as falling off.

In view of such a point, the present invention aims to restrict the above-mentioned intermediate shaft and floor plate support shaft from being pulled out more than a predetermined amount, and to leave a screwing length necessary for maintaining strength.

[Means for Solving the Problems]

A floor board supporting device of the present invention for achieving the above-mentioned object is a supporting cylinder provided on a base mounted on a floor, an intermediate shaft cylinder screwed into the supporting cylinder, and a floor plate support screwing into the intermediate shaft cylinder. The shaft is provided, and retaining means is provided at the screwed portions between the support cylinder and the intermediate shaft cylinder and between the intermediate shaft cylinder and the floor plate support shaft.

In this case, the retaining means is a shallow-bottom type male screw with a shallower screw bottom for the lower end required length of the male screw of each of the intermediate shaft cylinder and the floor plate supporting shaft, and each female screw of the supporting cylinder and the intermediate shaft cylinder has an upper predetermined length. It is preferable to use a locking female screw that is screwed onto the upper part of each male screw and has a smaller diameter than the screw bottom of the shallow-bottom male screw, and the remaining portion has a large diameter to allow the insertion of the opposing male screw.

[Action]

When the floor plate support shaft is rotated and raised, the retaining means keeps a required screwing length to prevent further withdrawal. Further, when the support shaft is rotated, the support shaft is rotated together with the intermediate shaft cylinder, and the intermediate shaft cylinder comes out of the support cylinder, holds the required screw length, and is prevented from rotating by the retaining means. Is prevented from slipping out.

〔Example〕

1 to 3 relate to an embodiment of the present invention. The floor plate supporting device 1 includes a base 2, an intermediate shaft cylinder 5 screwed into a support cylinder 3 provided on the base 2, and a floor plate support shaft 6 screwed into the intermediate shaft cylinder 5. Reference numeral 4 is a bottom plate of the base 2, and 7 is a receiving plate attached to the upper end of the floor plate support shaft 6.

The retaining means 10 and 20 are provided between the support cylinder 3 and the intermediate shaft cylinder 5 and between the intermediate shaft cylinder 5 and the bottom plate support shaft 6, respectively.
To provide. One retaining means 10 will be described with reference to FIGS. 1 and 2.

Reference numeral 11 is a female screw engraved on the inner surface of the support cylinder 3, and 15 is a male screw engraved on the intermediate shaft cylinder 5 so as to be screwed into the inner screw. The male screw 15 is, for example, 30 ° of JIS standard except for a predetermined lower length.
A trapezoidal screw (hereinafter referred to as a standard male screw) 16 and a shallow-bottomed male screw 17 having a predetermined length of the lower portion with the screw bottom having a dimension a shallower than the standard male screw 16 are used. Further, the female screw 11 is a JIS standard 30 ° trapezoidal female screw (hereinafter referred to as a locking female screw) 12 having an appropriate length at the upper portion, and the thread tip is located below the screw thread to conform to the shallow-bottom male screw 17. Is a low mountain type internal thread 13 enlarged by the dimension b, and the retaining female thread 12 and the shallow type external thread 17 form the retaining means 10.

That is, when the intermediate barrel 5 is screwed into the support barrel 3, as shown in FIG.
As shown in (c), standard male screw 16 and shallow-bottom male screw 17
It is easy to screw into the low angle female thread 13. However, at the time of extraction, the standard male screw 16 can be easily screwed out from the locking female screw 12 of the support cylinder 3, but the valley bottom d of the shallow male screw 17 has a large dimension c with respect to the outer end e of the female screw. Is blocked.

Therefore, by appropriately selecting the respective lengths of the locking female screw 12 and the shallow-bottom male screw 17, it is possible to maintain the minimum fitting length for maintaining the fitting strength when the intermediate barrel 5 is pulled out. it can.

In addition, the retaining means 2 in the intermediate shaft cylinder 5 and the floor plate support shaft 6
Also for 0, similarly, the male screw 21 of the floor plate support shaft 6 is a standard male screw 22 except for a predetermined length at the lower end, and the shallow predetermined male screw 23 has a shallow predetermined length at the lower end. The female screw 25 of the intermediate shaft cylinder 5 has a predetermined upper end length as a standard dimension female screw (hereinafter referred to as a locking female screw) 26, and below the female screw 25 is a shallow-bottom male screw 22.
The low angle female thread 27 that conforms to
And the shallow-bottom male screw 23 constitute the retaining means 20. f is the outer diameter of the locking female screw 26 and the shallow bottom male screw 23
It is a step with the valley bottom.

By appropriately selecting the respective lengths of the shallow-bottom male screw 23 and the locking female screw 26, it is possible to maintain a predetermined fitting length when the floor plate support shaft 6 is pulled out from the intermediate shaft cylinder 5.

The above-mentioned retaining means 10 and 20 are constituted by the locking female threads 12 and 26 having JIS standard dimensions and the shallow bottom male threads 17 and 23 having a bottom shallower than the standard dimensions. Even if the inner diameters of 12, 26 and the root diameters of the standard male screws 16 and 22 are set to be smaller than the JIS standard dimension and this is used as a standard, and the shallow bottom male threads 17 and 23 are formed with the JIS standard dimension having a larger valley diameter. Good.

Incidentally, reference numerals 30 and 31 in the drawing are lock nuts.

In the above configuration, the floor plate support shaft 6 and the intermediate shaft cylinder 5 are rotated to rotate the floor plate support shaft 6 via the receiving plate 7 from the lowered state. As a result, the floor plate support shaft 6 first comes out and ascends, and the retaining means 20 keeps a predetermined fitting length to prevent further independent rotation. Further, the rotation of the floor plate support shaft 6 is accompanied by rotation of the intermediate shaft cylinder 5, the intermediate shaft cylinder 5 slips out of the support cylinder 3 and rises, and is rotated by the retaining means 10 with a predetermined fitting length, that is, You are prevented from exiting.

It should be noted that the above-described rotation order is performed by the difference in the rotation torque due to the difference in the screw diameter, and in order to further increase the difference in the rotation torque, the fitting screw 11 between the support cylinder 3 and the intermediate shaft cylinder 5 is used. , 1
It is preferable that 5 is a double thread screw. As a result, the rising resistance can be increased and the difference in the rotational torque can be increased. This is convenient because the order of rotation (the order of ascending) can be made uniform when operating a large number of floorboard support devices.

[Effect of device]

According to the present invention, since the intermediate shaft cylinder is screwed to the support cylinder of the base and the floor plate support shaft is screwed to the intermediate cylinder, respectively, a jack in which the floor plate support shaft is directly screwed to the conventional base is used. The height adjustment range can be made larger than that of the above. Further, since each screwing portion is provided with a retaining means, the screwing length required for maintaining the strength does not remain and fall out. Furthermore, the floor plate support shaft first rotates and rises due to the difference in rotation torque only by rotating the floor plate support shaft, and then rotates together with the intermediate shaft cylinder, so that the intermediate shaft cylinder is directly rotated. It is convenient to operate without the need to move.

[Brief description of drawings]

1 to 3 relate to an embodiment of the present invention, FIG. 1 is an overall longitudinal sectional view, FIG. 2 is a sectional view taken along the line I--I in FIG. 1, and FIG. A partially enlarged view of the male thread of the barrel,
FIG. 4B is a partially enlarged view of the female screw of the support cylinder, FIG. 4C is an enlarged explanatory view of the retaining means 10, and FIG. 4 is an overall vertical cross-sectional view of the floorboard supporting device of the previous application. 1 is a floor plate support device, 2 is a base, 3 is a support cylinder, 5 is an intermediate shaft cylinder, 6 is a floor plate support shaft, 10 and 20 are retaining means,
1, 25 are female threads, 12, 26 are locking female threads, 13, 2
Reference numeral 7 is a low-angle female thread, 15 and 21 are male threads, and 17 and 23 are shallow-bottom male threads.

Claims (2)

[Scope of utility model registration request] 1. A support cylinder provided on a base mounted on a floor, an intermediate shaft cylinder screwed into the support cylinder, and a floor plate support shaft screwed into the intermediate cylinder, the support cylinder and the intermediate shaft. A floor plate supporting device, characterized in that retaining means is provided at each screwed portion between the cylinders and between the intermediate shaft cylinder and the floor plate supporting shaft. 2. The retaining means is a shallow-bottom type male screw having a shallower screw bottom for the lower end required length of the male screw of each of the intermediate shaft cylinder and the floor plate supporting shaft, and each female screw of the supporting cylinder and the intermediate shaft cylinder has an upper predetermined length. Is a locking female screw having a smaller diameter than the screw bottom of the shallow-bottom type male screw, and the remaining portion has a large diameter to allow the insertion of the opposing male screw. The floor board support device according to 1.