JP4031342B2 - Table height adjuster - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a table height adjusting device.
[0002]
[Prior art]
There is already known a table height adjusting device in which the height of the top plate can be freely set by adjusting the lengths of the four pedestals of the table (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 10-211046 (pages 1 and 2, FIGS. 1-2).
[0004]
[Problems to be solved by the invention]
In the above-described conventional apparatus, the external thread rod that rises from the lower part of the outer pedestal is screwed into a female screw cylinder provided at the lower end of the inner pedestal, and the outer pedestal is rotated to rotate the outer pedestal. Although the pedestal is moved in and out, since the pitch of the male screw and the female screw is a normal fine pitch for the caster shaft, it takes time and effort to move up and down. That is, the caster shaft needs to have a fine pitch in order to tighten it tightly. However, if this caster shaft with a fine pitch is used as it is, the pitch is too fine and must be rotated many times to raise and lower the table. Since such an elevating operation is performed on all of the four pedestals, it takes time for adjustment.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a table height adjusting device that requires only a small number of rotations of the pedestal for adjusting the length of the pedestal of the table and requires a short adjustment time.
[0006]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) An inner leg column having a female screw member at the lower end thereof fixed to the lower surface of the table and having an inner screw at its center, and an upwardly facing male screw that is externally fitted to the inner leg column and screwed to the female screw member at the lower end portion A table height adjusting device comprising: an outer pedestal provided with a flange; and a caster mounted on a lower portion of the outer pedestal and rotatable about an axis coaxial with the male screw ridge. An upper female screw portion having a rough pitch is provided at the upper portion of the central shaft hole of the bearing member fixed to the lower end of the male screw rod, and an upper female screw portion having a fine pitch is provided at the lower portion of the central shaft hole. part screwed, and by the nut screwed with the male screw rod above the said bearing member is tightened against the bearing member, the male screw rod fixed to the bearing member, to the lower female screw portion, the casters The top Screwing fine definitive pitch caster axis.
[0007]
( 2 ) In the above item ( 1 ) , a scale indicating the height of the table is provided at the position where the upper end of the outer pedestal moves up and down in the upper part of the inner pedestal.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view of a table provided with an embodiment of the present invention, FIG. 2 is an enlarged view showing one leg vertically, and FIG. 3 is an enlarged front view showing a height scale at the upper part of the leg. It is.
[0010]
As shown in FIG. 1, legs (3) with casters (2) are attached to the four corners of the lower surface of the table top (1).
[0011]
As is apparent from FIG. 2, the leg (3) covers the inner leg column (4) whose upper end is fixed to the lower surface of the top plate (1) and the outer side of the inner leg column (4). It consists of an outer pedestal (5) with a caster (2) attached to the lower end.
[0012]
The inner pedestal (4) consists of a hollow steel pipe, and the lower end ends at an intermediate position to the floor. A female screw member (6) having a female screw (6a) having a rough pitch at the center is fixed to the inner surface of the lower end portion.
[0013]
The upper end of the outer pedestal (5) ends at a position slightly spaced downward from the lower surface of the top plate (1), and a bearing member (7) is fixed to the inner surface of the lower end.
[0014]
The central shaft hole (7a) of the bearing member (7) has a female screw with a fine pitch formed in the lower portion thereof, and the caster shaft (2a) of the caster (2) is screwed into the lower female screw portion (8). It is fixed.
[0015]
The upper part of the central shaft hole (7a) of the bearing member (7) has a male screw with a rough pitch, and the upper female screw part (9) has a lower end part of an upwardly male screw rod (10) with the same rough pitch. Are screwed in and firmly fixed by a flat washer (11), a spring washer (12) and a nut (13) .
[0016]
Male threaded rod (10) is screwed into the internal thread (6a) of the center of the internally threaded member of the lower end portion of the inner pillar (4) (6), extends upward to an intermediate position of the leg (3).
[0017]
As shown in FIG. 3, a scale (14) is provided on the upper outer peripheral surface of the inner pedestal (4). The reading value where the upper end of the outer pedestal (5) hides the scale (14) represents the height of the top surface from the floor surface, that is, the height of the table.
[0018]
【The invention's effect】
According to the first aspect of the present invention, the number of rotations of the outer pedestal for adjusting the height of the legs is reduced, and the labor and time for adjustment can be greatly reduced.
Further, the male screw rod having a rough pitch can be firmly fixed to the bearing member.
[0019]
According to the second aspect of the present invention, the leg length can be set accurately and reliably, and the lengths of the four legs can be easily and reliably aligned.
[Brief description of the drawings]
FIG. 1 is a perspective view of an example of a table provided with an embodiment of the present invention.
FIG. 2 is also a partially longitudinal enlarged view of one leg.
FIG. 3 is also a partially enlarged front view of the upper part of one leg.
[Explanation of symbols]
(1) Top plate
(2) Caster
(3) Leg
(4) Inner pedestal
(5) Outer pedestal
(6) Female thread member
(6a) Female thread
(7) Bearing member
(7a) Center shaft hole
(8) Lower female thread
(9) Upper female thread
(10) Male screw thread
(11) Flat washer
(12) Spring washer
(13) Nut
(14) Scale

Claims (2)

An inner leg pillar fixed to the lower surface of the table and having an internal thread member at the lower end thereof with an internal thread at the center, and an upward male screw rod externally fitted to the inner leg pillar and screwed to the internal thread member at the lower end section In a table height adjusting device comprising: an outer pedestal; and a caster attached to a lower portion of the outer pedestal and capable of turning about an axis coaxial with the male screw rod.
An upper female screw portion having a rough pitch is provided above the central shaft hole of the bearing member fixed to the lower end portion of the outer pedestal, and a lower female screw portion having a fine pitch is provided at the lower portion of the central shaft hole. The lower end portion of the male screw rod is screwed into the portion, and a nut screwed into the male screw rod above the bearing member is tightened toward the bearing member, thereby fixing the male screw rod to the bearing member, A table height adjusting device, wherein a caster shaft having a fine pitch at an upper portion of the caster is screwed to a female screw portion. At the top of the inner pedestal, to position the upper end of the outer pedestal is vertically moved, the height adjusting device according to claim 1, wherein the table provided with a scale indicating the height of the table.

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