JPH10179263A - Slide adjusting mechanism and top plate lifting/lowering device for furniture using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb the size fluctuation due to machining tolerance by adjusting a gap adjusting means disposed on a slide guide member, and swellingly defoming the slide guide face of the slide guide member in the facing direction. SOLUTION: A hexagon wrench hole 14b formed on one end face of an expansion member 14 is rotated with a hexagon wrench, and a male screw 15 a and a nut 15b are screwed to the fastening side. The tapered face 14a of the expansion member 14 is relatively slide-moved to the small-diameter side against the tapered face 5c of a slide guide member 5, and the slide guide face 5a of the slide guide member 5 is elastically and swellingly deformed to the facing direction of both coupling faces 2a, 4a. Even if the facing interval between the inner periphery 2a of an outside tube 2 and the outer periphery 4a of an inside tube 4 is fluctuated by the tolerance at the time of press machining and the tolerance of the thickness of a material, the size fluctuation caused by the tolerance is absorbed by the elastic swelling deformation of the slide guide face 5a. Since the swelling deformation quantity of the slide guide face 5a of the slide guide member 5 can be finely adjusted on a unit of μm, an adjustment can be made to a proper sliding state quickly, accurately, and easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding adjustment mechanism for smoothly sliding two members relatively movably fitted without rattling, and a furniture top plate using the same. It relates to a lifting device.

[0002]

2. Description of the Related Art In a conventional sliding adjustment mechanism, for example, in a furniture top plate elevating device in which both members are constituted by an outer tube erected from leg members and an inner tube fixed to a top plate. ,
A sliding guide made of a synthetic resin, which is in sliding contact with a plurality of locations on the inner peripheral surface of the outer cylinder and a plurality of locations on the outer peripheral surface of the inner cylinder, the sliding guide being in opposition to the outer peripheral surface of the inner cylinder or the inner peripheral surface of the outer cylinder. The members were attached. The facing distance between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder is the tolerance at the time of press working of the outer cylinder and the inner cylinder, even if each component is manufactured within the specified processing accuracy. Since the thickness varies depending on the tolerance of the thickness of the material and the tolerance of the sliding guide member during resin molding, a plurality of types of the sliding guide member having different thicknesses have been prepared.

[0003]

However, the facing distance between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder is slightly different in the circumferential direction and the relative movement direction, and is the same as the facing distance of the same part. However, since it differs for each product, it is substantially impossible to prepare a sliding guide member having a plate thickness that matches the facing distance. Therefore, in practice, a small sliding guide member close to the measured facing distance is selected and attached, so that the sliding contact guide surface of the sliding guide member and the outer peripheral surface of the inner cylinder facing the sliding guide member or Inevitably, a gap is formed between the outer cylinder and the inner peripheral surface. As a result, not only is the sliding of the inner cylinder sliding up and down with respect to the outer cylinder, but also the gap generated is enlarged even if the generated gap is minute. There was a problem that appeared as a large inclination of the top plate. The present invention has been made in view of the above-described circumstances, and a first main problem thereof is that the facing distance between the fitting surfaces of both members fitted relatively movably fluctuates due to processing tolerance or the like. Even in this case, a sliding adjustment mechanism that can reliably and easily absorb the dimensional fluctuation by a simple adjustment operation, and that can simultaneously achieve the simplification of the structure and the reduction of the manufacturing cost. The second main problem is to provide a furniture top plate lifting / lowering device that can smoothly lift and lower the top plate without tilting or backlash while increasing the amount of lifting and lowering of the top plate.

[0004]

A feature of the sliding adjusting mechanism according to the present invention is that a sliding guide member is interposed between fitting surfaces of both members which are movably fitted to each other. The sliding guide member is provided with a gap adjusting means for swelling and deforming the sliding guide surface in a direction opposite to the two fitting surfaces. According to the characteristic configuration, even if the facing distance between the fitting surfaces of the two members that are relatively movably fitted to each other fluctuates due to a tolerance at the time of press working, a tolerance of the thickness of the material, and the like, the sliding guide member is provided. By adjusting the gap adjusting means, the sliding guide surface of the sliding guide member is swelled and deformed in a direction opposite to the two mating surfaces.
By absorbing the dimensional change caused by the tolerance, the sliding guide surface of the sliding guide member and the corresponding fitting surface can be appropriately brought into sliding contact with each other. Therefore, even if the facing distance between the fitting surfaces of the two members fluctuates due to processing tolerances, etc., this dimensional change can be reliably and easily absorbed by a simple adjusting operation of the gap adjusting means. Since only the sliding guide surface of the sliding guide member itself interposed between the mating surfaces is swelled and deformed, the structure can be simplified and the manufacturing cost can be reduced at the same time.

A feature of the sliding adjusting mechanism according to a second aspect of the present invention is that the gap adjusting means is configured to be adjustable from a relative movement direction through a gap between the two fitting surfaces. According to the characteristic configuration, the adjusting operation of the gap adjusting means provided on the sliding guide member can be performed using the gap between the fitting surfaces of both members on which the sliding guide member is interposed. Therefore, there is no need to penetrate the operation opening in the member located on the outside, and it is possible to reduce the manufacturing cost by reducing the number of processing steps, and to simultaneously improve the external design of the sliding adjustment mechanism. Can be.

A feature of the sliding adjusting mechanism according to a third aspect of the present invention is that the sliding guide member is made of a synthetic resin impregnated with lubricating oil. According to the characteristic configuration, the sliding guide surface of the sliding guide member and the fitting surface of the member can be corrected to an appropriate sliding contact state by the adjusting operation by the gap adjusting unit, and furthermore, the sliding surfaces thereof can be corrected. On the face,
Since the lubricating oil is supplied from the synthetic resin constituting the sliding guide member, the relative sliding movement of the two members can always be performed reliably and smoothly.

According to a fourth aspect of the present invention, the slide adjusting mechanism is characterized in that the sliding guide member is formed in a substantially L-shape interposed between two fitting surfaces that are orthogonal or nearly orthogonal. And the gap adjusting means is provided on each of both sides in the L-shaped direction. According to the characteristic configuration, the gap between the two fitting surfaces that are perpendicular or almost perpendicular can be individually adjusted using one sliding guide member, so that the mounting structure of the sliding guide member is simplified. Can be achieved.

According to a fifth aspect of the present invention, there is provided a sliding adjusting mechanism, wherein the gap adjusting means is formed in a sliding guide member so as to pass through the sliding guide member in a state parallel or substantially parallel to the fitting surface. An expanding member having a tapered surface that comes into contact with a tapered surface formed at a longitudinally intermediate portion of the long hole; and a bulging portion that relatively moves the expanding member toward the small diameter side with respect to the tapered surface of the sliding guide member. And an adjusting unit.
According to the characteristic configuration, of the sliding contact guide surface of the sliding guide member, a portion corresponding to an elongated hole parallel or substantially parallel to the fitting surface is easily swelled outward and deformed. The tapered surface formed in the middle portion in the major axis direction of the hole and the tapered surface of the expanding member can be swelled and deformed steplessly, so that the sliding guide surface of the sliding guide member and the fitting surface of the member are appropriately adjusted. It can be quickly and easily adjusted to a smooth sliding contact state. In addition, as compared with the case where the long hole is opened on one side in the major diameter direction, breakage due to swelling deformation of the sliding guide member itself can be suppressed, and durability is improved. be able to.

The sliding adjustment mechanism according to a sixth aspect of the present invention is characterized in that the tapered surface of the sliding guide member and the tapered surface of the expansion member are formed in a truncated cone shape, and the swelling adjusting portion is formed. It consists of screws. According to the characteristic configuration, the expanding member and the sliding guide member are relatively slidably moved toward the small diameter side along the frustoconical tapered surface with the rotation operation of the screw. The amount of bulging deformation of the guide surface can be finely adjusted in micron units, and the slide guide surface of the slide guide member and the fitting surface of the member can be quickly, accurately and easily adjusted to an appropriate sliding contact state. be able to.

According to a seventh aspect of the present invention, the furniture top plate elevating device according to a seventh aspect of the present invention is characterized in that the two members are constituted by an outer tube erected from leg members and an inner tube fixed to the top plate. A sliding guide member provided with the gap adjusting means is attached to each of a lower end side of an outer peripheral surface of the inner cylinder and an upper end side of an inner peripheral surface of the outer cylinder. The point is that an urging means for urging upward is provided.
According to the characteristic configuration, even if the facing distance between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder fluctuates due to a tolerance at the time of press working, a tolerance of a plate thickness of a material, and the like, the sliding guide member is provided. By adjusting the gap adjusting means, the sliding guide surface of the sliding guide member is swelled and deformed in a direction opposite to the two mating surfaces.
By absorbing the dimensional change caused by the tolerance, the sliding guide surface of the sliding guide member and the corresponding fitting surface can be appropriately brought into sliding contact with each other. In addition, since the urging means for urging the top plate upward is provided by utilizing the inner space of the outer cylinder and the inner cylinder, it is necessary to separately secure a space for attaching the urging means outside the two cylinders. There is no. Therefore, even when the facing distance between the fitting surfaces of the two cylinders fluctuates due to processing tolerances, etc., this dimensional change can be reliably and easily absorbed by a simple adjustment operation of the gap adjusting means. It only swells and deforms the slide guide surface of the slide guide member itself interposed between the mating surfaces, so that the top plate elevating structure is simplified and the manufacturing cost is reduced, and The lifting operation can be performed smoothly and reliably without increasing the amount of lifting and lowering, without tilting or rattling of the tabletop.

According to a eighth aspect of the present invention, there is provided a furniture top plate elevating / lowering apparatus, wherein the outer cylinder is closed from above with a fitting surface between an inner peripheral surface of the outer cylinder and an outer peripheral surface of the inner cylinder. A cover is attached, and a part of the cover facing the fitting surface is provided with a sliding guide member having the gap adjusting means and an operation hole for operating the gap adjusting means from the outside. It is in that point. According to the characteristic configuration, not only can the slide guide member be attached using the cover that closes the space between the fitting surface between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder from above, Through the operation hole of the cover,
The gap adjusting means of the sliding guide member interposed between the fitting surfaces of the two cylinders can be easily adjusted from the outside. Accordingly, not only can the mounting structure of the sliding guide member be simplified, but also the adjusting operation of the gap adjusting means can be easily performed from the outside while the sliding guide member including the gap adjusting means is covered with a cover in a good shape. It can be carried out.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 show a top plate elevating device for furniture (table) using a sliding adjustment mechanism.
A square tubular outer tube 2 erected from a wooden leg member 1,
A square tube-shaped inner tube 4 fixed to the lower surface of the wooden top plate 3 is fitted and connected so as to be relatively movable within a certain range in the vertical direction, and is connected to the top plate 3 and the leg member 1. A gas cylinder B, which is an example of an urging means for urging the top plate 3 upward, is provided through the inner space of the outer tube 2 and the inner space of the inner tube 4. Further, the inner cylinder 4
Two perpendicularly or substantially perpendicularly to each of the corners on the lower end side of the outer peripheral surface (also a fitting surface) 4a and the upper end side of the inner peripheral surface (also a fitting surface) 2a of the outer cylinder 2 Fitting surfaces 2a, 4
a sliding guide member 5 formed in a substantially L-shape interposed therebetween is mounted on each of both sides of the sliding guide member 5 in the L-shaped direction. A gap adjusting means A for expanding and deforming the moving guide surface 5a in a direction opposite to the two fitting surfaces 2a, 4a is adjusted through a gap S between the two fitting surfaces 2a, 4a from a relative movement direction (vertical direction). It is provided freely.

As shown in FIGS. 2 to 4, the inner cylinder 4 includes a pair of left and right metal divided cylinders 4A press-formed in a U-shape and side plates of both divided cylinders 4A. And a pair of front and rear metal plates 4B joined by spot welding over the portion, and is screwed to an embedded nut 7 of the top plate 3 at the upper end of the inner cylinder 4 with a screw 8. A metal mounting plate 9 to be fixed is fixed by welding. A cylinder tube 2 of the gas cylinder B is provided on a plate portion 9A of the mounting plate 9 which crosses through a concave portion 4b formed by notching at the upper end of the two divided cylindrical bodies 4A.
A mounting hole 9a for the upper mounting shaft 20A is formed in the upper mounting shaft 20A.
E-ring 10 for retaining to come into contact with the upper surface of the plate portion 9A
Is fitted.

As shown in FIGS. 2 to 4 and 10, the outer cylinder 2 has a pair of left and right metal divided cylinders 2A press-formed in a U-shape, and both divided cylinders 2A and 2B. A pair of front and rear metal plates 2B joined by spot welding over the side plate portion of the outer tube 2A, and a lower end of the outer tube 2 is provided with a leg member at a lower side of the outer tube 2. When fitted into the square fitting hole 1a formed through the center of the leg member 1, the backing plate 11 that contacts the upper surface of the leg member 1 is fixed by welding. Further, a mounting hole 6a through which the lower end of the piston rod 21 of the gas cylinder B penetrates is formed in the downwardly U-shaped reinforcing connecting plate 6 fixed to the lower end of the outer cylinder 2 by welding. At the same time, a lock nut 22 that is in contact with the lower surface of the reinforcing connection plate 6 is screwed to the protruding end of the piston rod 21. A cap nut 12 which is fitted from above into a mounting hole 1b formed through a plurality of locations of the leg member 1 in the backing plate 11.
The outer tube 2 and the leg member 1 are firmly fixedly connected in a fitted state by a screwing operation between the countersunk bolt 13 inserted from below each of the mounting holes 1b and the cap nut 12. Have been.

The sliding guide member 5 is made of a synthetic resin impregnated with a lubricating oil and is made of oil-containing Duracon resin.
As shown in FIG. 5, a long hole 5b formed through the sliding guide member 5 and being parallel or substantially parallel to the fitting surfaces 2a, 4a, and a truncated conical taper formed at a longitudinally intermediate portion of the long hole 5b. A metal expanding member 14 having a frusto-conical tapered surface 14a in contact with the surface 5c; and a screw for slidingly moving the expanding member 14 to the small diameter side with respect to the tapered surface 5c of the sliding guide member 5. And a swelling adjusting section 15 of a type. The screw-type bulging adjustment section 15 is provided with the expansion member 14.
Male screw 15a integrally formed on one end of the
A portion of the sliding guide member 5 which is located on the side opposite to the side where the truncated cone-shaped tapered surface 5c is present. Is formed with a concave portion 5d that can hold the nut 15b in a detented state while retaining friction (prevention of removal).

When the hexagon wrench hole (rotation operation hole) 14b formed on one end surface of the expansion member 14 is rotated with a hexagon wrench, the male screw 15a and the nut 15b are screwed into the tightening side. Tapered surface 5c of motion guide member 5
The tapered surface 14a of the expanding member 14 is relatively slidably moved toward the small diameter side, and the sliding guide surface 5a of the sliding guide member 5 is elastically swelled and deformed in the opposite direction of the fitting surfaces 2a, 4a. Is done. Due to such elastic swelling deformation of the sliding guide surface 5a, the inner peripheral surface 2a of the outer cylinder 2 and the outer peripheral surface 4a of the inner cylinder 4 are formed.
Is the tolerance at the time of press working (for example, plus or minus 0.2 mm), the thickness tolerance of the material (for example,
Even if it fluctuates due to (+/- 0.12 mm) or the like, the dimensional fluctuation caused by this tolerance is absorbed, and the sliding guide surface 5a of the sliding guide member 5 and the corresponding fitting surface 2a,
4a can be brought into sliding contact appropriately. Further, the respective inclination angles (gradients) of the tapered surface 5c of the sliding guide member 5 and the tapered surface 14a of the expansion member 14 are set to 10 degrees,
In addition, when the male screw 15a is set to M3 (metric screw), expansion (bulging) of 0.09 mm can be performed by one rotation of the expansion member 14, and the expansion member 1
With a quarter rotation of 4, an extension adjustment of 0.0225 mm can be made. In this case, since the amount of swelling deformation of the sliding contact guide surface 5a of the sliding guide member 5 can be finely adjusted in micron units, the sliding guide surface 5a of the sliding guide member 5 and the fitting surfaces 2a, 4a can be adjusted. Can be quickly, accurately and easily adjusted to an appropriate sliding contact state.

As shown in FIGS. 4 and 5, the upper end of the outer cylinder 2 closes the upper surface between the fitting surfaces of the inner peripheral surface 2a of the outer cylinder 2 and the outer peripheral surface 4a of the inner cylinder 4. A cover 16 made of a synthetic resin such as polyethylene or the like is detachably attached by a plurality of screws 17 and a portion of the lower surface of the cover 16 facing the fitting surfaces 2a and 4a has the gap. A corner portion of the sliding guide member 5 provided with the adjusting means A is fastened and fixed with a screw 18, and an operation hole 16a for rotating the expanding member 14 of the gap adjusting means A from outside with a hexagon wrench is provided. , Are formed through the cover 16. The cover 16 includes an annular lid portion 16A that enters the gap S between the fitting surfaces 2a and 4a, and an annular mounting portion 16B that is externally fitted to the outer peripheral surface 2b of the outer cylinder 2. A plurality of reinforcing ribs 16b are integrally formed on the inner surface of the annular lid 16A. Then, using a cover 16 for closing the annular gap S between the inner peripheral surface 2a of the outer cylinder 2 and the outer peripheral surface 4a of the inner cylinder 4 from above,
Sliding guide member 5 provided at each corner of annular gap S
Not only can be attached, but also
Through the operation holes 16a of the two cylinders 2 and 4,
The gap adjusting means A of the sliding guide member 5 interposed between the members a can be easily adjusted from the outside.

As shown in FIGS. 8, 9 (a) and 9 (b), each of the lower slide guide members 5 has a lock formed through the lower end of the inner cylinder 4. As shown in FIGS. A columnar locking projection 5e which is detachable from the outer peripheral surface 4a side with respect to the hole 4c, and a mounting hole 5f for fastening and fixing the outer peripheral surface 4a of the inner cylinder 4 with a screw 19 are formed.

As shown in FIGS. 2 and 3, the gas cylinder B has a first cylinder chamber 20A and a second cylinder chamber 20B in which oil is sealed in the cylinder tube 20.
And a free piston 24 that partitions the third cylinder chamber 20C filled with nitrogen gas, and the piston 23 is opened by a push rod 25 provided in the piston rod 21. It is provided with a spool valve 26 to be operated and an orifice hole 27. And the piston rod 23
When an upward operating force is applied to the lower end of the cylinder, the spool valve 26 is opened, and the oil in the first cylinder chamber 20A and the second cylinder chamber 20B can flow through the orifice hole 27. The piston rod 23 is extended by the gas pressure of the nitrogen gas in the third cylinder chamber 20C, but contracts when a pushing force is applied to the piston rod 23. When the operating force on the push rod 25 is released, the spool valve 26 is closed by the gas pressure, and the gas cylinder B is locked.

Next, the pedal operation mechanism of the gas cylinder B will be described. As shown in FIGS. 10 to 13, a leaf spring 28 that is elastically bendable in the vertical direction is attached to a metal operation mounting plate 30 screwed to the lower surface of the leg member 1.
Is pivotally mounted on the rivet 29 so as to be swingable about the longitudinal axis,
A pedal 31 projecting outward through a concave portion 1c formed in the leg member 1 is fixed to one end of the leaf spring 28 with a screw, and when the pedal 31 is depressed, the lower end of the push rod 25 is pressed. A fulcrum member 32 for elastically bending the leaf spring 28 to a state in which the leaf spring 28 can be pressed by the base end portion 31a of the pedal 31 is fixed with a screw or the like. Also, of the operation mounting plate 30, the leg member 1
In the operation guide plate portion 30A corresponding to the concave portion 1c, a depression operation position P1 where the base end portion 31a of the pedal 31 is located immediately below the push rod 25, and the pedal 31
Of the operation guide groove 30B, the base end portion 31a of the operation guide groove 30B is selectively locked and held at a depression position T2 which is laterally disengaged from the operation area for the push rod 25. Spring 31 with depression of pedal 31 in the state of
A stopper member 33 for preventing elastic deformation of the pedal 31 by contact with the base end portion 31a of the pedal 31 is attached to the reinforcing connecting plate 6. When the pedal 31 is at the depressing operation position P1, the base end portion 31a of the pedal 31
When the pedal 31 is at the depressed restraint position P2, the pedal 31 does not come into contact with the stopper member 33 so that the base 31a of the pedal 31 does not come into contact with the lower end of the push rod 25. Base end 3 of
Each side edge 31b in the width direction 1a is cut out in the shape of a letter. When the top plate 3 is not to be moved up and down, the pedal 31 is operated to the depression check position P2 of the operation guide groove 30B. Even if the pedal 31 is erroneously depressed in this state, the pedal 31 does not move. Therefore, the lower end of the push rod 25 is not unexpectedly pushed up, and the gas cylinder B can be maintained in the locked state. In the above-described embodiment,
Since the height of the top plate 3 can be changed within the range of the operation stroke (for example, 200 to 300 mm) of the gas cylinder B, one table can be used for a plurality of applications having different heights such as a dining table and a living table. You can use them properly.

[Other Embodiments] In the above embodiment, the table top lifting device has been described. However, it can be used as a table top lifting device for other furniture such as a learning desk. In the sliding adjustment mechanism of the above, the two members 2 and 4 fitted so as to be relatively movable.
Can be applied to any sliding structure as long as the sliding guide is provided. Although a gas cylinder is used as the urging means B for urging the top plate 3 upward, a gas cylinder having another urging structure such as a coil spring may be used instead.
The top plate 3 may be configured to be moved up and down by a screw. In the above-described embodiment, the sliding guide member 5 is formed in a substantially L-shape interposed between two fitting surfaces that are perpendicular or almost perpendicular to each other. You may comprise and implement in the linear block which can be interposed.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a table.

FIG. 2 is a longitudinal sectional view of a main part when the height of the top plate is lowered.

FIG. 3 is a longitudinal sectional view of a main part when the height of a top plate is increased.

FIG. 4 is an enlarged vertical sectional view of a main part showing a mounting structure on a top plate side.

FIG. 5 is an enlarged vertical sectional view of a gap adjusting means and a cover.

FIG. 6 is a cross-sectional plan view showing an arrangement relationship between an upper slide guide member and a gap adjusting unit.

7A is an exploded enlarged vertical sectional view of the upper slide guide member and the gap adjusting means. FIG. 7B is an enlarged enlarged vertical sectional view of the upper slide guide member and the gap adjuster.

FIG. 8 is a bottom sectional view showing an arrangement relationship of a lower slide guide member and a gap adjusting means.

9A is an exploded enlarged vertical sectional view of a lower sliding guide member and a gap adjusting means. FIG. 9B is an enlarged enlarged vertical sectional view of a lower sliding guide member and a gap adjusting means.

FIG. 10 is an enlarged longitudinal sectional view of a main part showing an attachment structure on a leg member side.

FIG. 11 is a bottom view of the leg member side.

FIG. 12 is an enlarged sectional view of a main part.

FIG. 13 is an enlarged front view of a pedal operation guide unit.

[Explanation of symbols]

 Reference Signs List A gap adjusting means B urging means (gas cylinder) 1 leg member 2 outer cylinder (member) 2a inner peripheral surface (fitting surface) 3 top plate 4 inner cylinder (member) 4a outer peripheral surface (fitting surface) 5 sliding Guide member 5a Sliding guide surface 5b Slot 5c Tapered surface 14 Expansion member 14a Tapered surface 15 Swelling adjustment unit 16 Cover 16a Operation hole

Claims (8)

[Claims] 1. A sliding guide member is interposed between fitting surfaces of two members which are relatively movably fitted to each other, and the sliding guide member is provided with the sliding guide surface facing the two fitting surfaces. A sliding adjustment mechanism provided with a gap adjusting means for expanding and deforming in the direction. 2. The slide adjusting mechanism according to claim 1, wherein said gap adjusting means is configured to be adjustable from a relative movement direction through a gap between said two fitting surfaces. 3. The slide adjusting mechanism according to claim 1, wherein the slide guide member is made of a synthetic resin impregnated with a lubricating oil. 4. The sliding guide member is formed in a substantially L-shape interposed between two fitting surfaces that are perpendicular or almost perpendicular to each other, and each of both side portions in the L-shaped direction. The sliding adjusting mechanism according to any one of claims 1 to 3, wherein the gap adjusting means is provided on the sliding member. 5. A method according to claim 5, wherein said gap adjusting means comprises a long hole formed in the sliding guide member in a state parallel or substantially parallel to said fitting surface, and a tapered surface formed in a longitudinally intermediate portion of said long hole. 2. An expansion member having a tapered surface that comes into contact with the swelling member, and a swelling adjustment portion that moves the expansion member relative to the tapered surface of the sliding guide member toward a small diameter side.
The sliding adjustment mechanism according to any one of Items 4 to 4. 6. The tapered surface of the sliding guide member and the tapered surface of the expansion member are formed in a truncated cone shape, and the bulging adjustment portion is formed of a screw.
The sliding adjustment mechanism according to the above. 7. A furniture top plate lifting / lowering apparatus using the sliding adjustment mechanism according to claim 1, wherein the two members are an outer cylinder erected from a leg member. A sliding guide member comprising: an inner cylinder fixed to a top plate; and a clearance guide provided on each of a lower end side of an outer peripheral surface of the inner cylinder and an upper end side of an inner peripheral surface of the outer cylinder. And a urging means for urging the top plate upward through the two cylinders. 8. The outer cylinder is provided with a cover which closes a space between a fitting surface between an inner peripheral surface of the outer cylinder and an outer peripheral surface of the inner cylinder from above. 8. A furniture top plate elevating device according to claim 7, wherein a sliding guide member provided with said gap adjusting means and an operation hole for operating said gap adjusting means from the outside are provided in a portion facing said space.