JP5954976B2 - Table height adjustment device - Google Patents

Description

  The present invention reinforces the support strength of caster mounting bolts provided at the lower ends of legs of, for example, tables, chairs, furniture, etc., and prevents breakage or deformation of the casters. The present invention relates to a height adjusting device such as a table that can easily and reliably adjust the height of the table and can maintain the adjusted height over a long period of time.

  For example, as a table height adjusting device having a caster that can move on the floor surface, a through hole is formed on the lower surface of both ends of the leg, and a nut is fixed to the opening edge of the through hole. A recess of the adjustment handle is removably attached, a mounting bolt provided on a caster is inserted into an engagement hole formed in the recess, and this is screwed into the nut, and a spring receiver provided on the adjustment handle and the mounting bolt; A spring is disposed between the two, and when adjusting the height, the adjustment handle is pushed down and rotated in an appropriate direction to adjust the screwing amount of the mounting bolt (for example, see Patent Document 1).

  However, since the device is supported only by nuts that fix the mounting bolts to the legs, when the table or caster is overloaded, the mounting bolts bend and the adjustment handle is damaged, making it difficult to use. Alternatively, there is a problem that the adjustment position of the mounting bolt is changed by being pushed around when the adjustment handle comes into contact with the peripheral member.

  In order to solve such a problem, a protrusion is provided on the peripheral surface of the lower end of the leg of the table, and a mounting bolt protruding from the support shaft of the caster is screwed into the lower end via a spring, and the lower end of the leg is A hollow cylindrical locking member is disposed on the peripheral surface of the portion and the support shaft, a concave groove that can be engaged with the protrusion is formed on the inner surface of the locking member, and the locking member is pushed down appropriately when the height is adjusted. There is one that rotates in the direction and adjusts the screwing amount of the mounting bolt (see, for example, Patent Document 2).

  However, since the device is supported by screwing the mounting bolt into the lower end of the leg, when the table or caster is overloaded, the mounting bolt is bent and the locking member is broken, making it difficult to use. Alternatively, there is still a problem that the adjustment position of the mounting bolt is changed by being pushed around when the locking member comes into contact with the peripheral member.

  Therefore, as a solution to such a problem, a small-diameter male screw portion formed on a caster shaft integral with the caster is screwed into a lower end portion of a leg of the folding table via a spring washer, An adjustment cylinder having a female thread portion is disposed between the caster and the large-diameter male thread portion of the caster shaft is screwed into the female thread portion. When adjusting the height, the adjustment cylinder is rotated in an appropriate direction to adjust the adjustment cylinder. In some cases, the distance between the upper end of the leg and the enlarged diameter step at the lower end of the leg is adjusted (for example, see Patent Document 3).

  In this device, the caster shaft's small and large diameter male screw portions are screwed into the lower end portion of the leg and the female screw portion of the adjustment cylinder to enhance the support strength of the caster shaft. This causes a problem that the caster shaft rotates and the adjustment position of the caster shaft changes over time.

In order to solve such a problem, a female screw part into which a mounting bolt integral with the adjuster can be screwed and a circumferential groove into which a part of the adjuster can be inserted are formed at the lower end part of the leg of the folding table. A synthetic resin adjuster that is fixed to the mounting bolt and that rotates the bolt is provided. When the adjuster is inserted into the circumferential groove, the adjuster contacts the wall surface of the circumferential groove. A part that touches and deforms, urges the wall surface, and has a brake part that prevents the adjuster from rotating. At the time of height adjustment, the mounting bolt is screwed into the female screw part of the leg, and the screwing amount is adjusted. It was done by.
Then, during the adjustment, the adjuster is prevented from rotating by the urging force that deforms the peripheral surface of the braking portion and abuts against the wall surface of the circumferential groove, and the frictional resistance between the wall surface and the braking portion, Some have been designed to prevent loosening (see, for example, Patent Document 4).

  However, this device has insufficient support strength for the mounting bolts, and it is difficult to prevent deformation and breakage, and the structure of the lower end of the leg and the adjuster is complicated and difficult to manufacture. The urging force of the adjuster's braking part and the frictional resistance between the wall surface of the circumferential groove and the braking part are attenuated, causing the adjuster to turn and cause play, and the initial adjustment position changes in a short period of time. There was a problem.

Utility Model Registration No. 2532189 Japanese Patent No. 4009211 JP 2007-261542 A Japanese Patent No. 4805723

  The present invention solves such problems, for example, strengthens the support strength of caster mounting bolts provided at the lower ends of legs of tables, chairs, furniture, etc., and prevents breakage and deformation of the legs. Another object of the present invention is to provide a height adjusting device such as a table that can easily and surely adjust the height of the top plate from the floor surface and can maintain the adjusted height for a long period of time.

According to the first aspect of the present invention , a screw hole is opened on the lower surface of the leg end provided at the lower end of the leg column, and the screw
A screw shaft of an adjuster is provided in the hole so that the screw shaft can be screwed, and a mounting bolt rotatably attached to the grounding member is provided in the adjuster so as to be screwable. A lower surface of the leg end via a screwing amount of the screw shaft with respect to the screw hole In a height adjusting device such as a table, the height of which is adjustable, a stopper ring provided with a plurality of engaging claws is fixed to the upper end portion of the screw shaft, and the engaging claws are engaged with the inner surface of the leg end. The stopper ring is prevented from rotating during use and the screw shaft is prevented from rotating during use, so that the height adjustment position by the adjuster can be maintained over a long period of time .

The invention according to claim 2 is provided with a plurality of engaging grooves on the inner surfaces of the leg ends facing each other, and the engaging grooves are provided in the engaging grooves so that the engaging claws can be engaged , thereby strongly preventing the stopper ring from rotating during use. The rotation of the screw shaft is prevented, and the height adjustment position by the adjuster can be firmly maintained for a long time .

The invention of claim 3, formed along the engaging groove in the movement direction of the screw shaft extends the engagement area between the stopper ring in the vertical direction, extensively form the height adjustment range by the adjuster I am doing so.
According to the invention of claim 4, the stopper ring is formed in a substantially hexagonal plate shape, six engaging claws are formed at equiangular positions on the outer periphery thereof, the stopper ring is formed in a rational shape, and a plurality of engagements are formed. The nail has the same function .
The invention of claim 5, the engagement pawl formed in a substantially inverted L-shape, a notch groove is formed in the circumferential direction on the inner side of the engaging claw, elastically deformable form the engaging pawl into and out direction Thus, the elastic displacement of the engaging claw is promoted, and the stopper ring is smoothly operated .

According to a sixth aspect of the present invention, the outer periphery of the engaging claw formed in a substantially inverted L shape is formed in a substantially chevron shape, and the pointed portion of the outer periphery is formed to be engageable with and disengageable from the engaging groove, thereby strengthening the engaging force. Thus, the stopper ring is prevented from rotating, and the engagement claw is elastic so that the engagement can be released, so that the adjustment operation by the stopper ring can be performed smoothly and easily.
According to the invention of claim 7, the stopper ring is made of synthetic resin, realizes weight reduction and easy and inexpensive manufacture, and imparts appropriate elasticity to smoothly perform the height adjustment operation by the adjuster. .
In the invention of claim 8, the grounding member is a caster, and movement of a table, a chair, furniture or the like is easily realized.

The invention of claim 1 fixes a stopper ring provided with a plurality of engaging claws at the upper end of the screw shaft,
Since the engaging claw is provided so as to be engageable with the inner surface of the leg end, the stopper ring is prevented from rotating during use and the screw shaft is prevented from rotating, and the height adjustment position by the adjuster is maintained for a long time. it can be.

According to the second aspect of the present invention, a plurality of engaging grooves are provided on the inner surfaces of the leg ends facing each other, and an engaging claw is provided in the engaging groove so that the stopper ring can be strongly prevented from rotating during use. It is possible to prevent the screw shaft from rotating and to maintain the height adjustment position by the adjuster firmly for a long period of time .

In the invention of claim 3, since the engaging groove is formed along the moving direction of the screw shaft, the engaging area with the stopper ring is expanded in the vertical direction, and the height adjusting area by the adjuster is formed in a wide range. Can do.
In the invention of claim 4, since the stopper ring is formed in a substantially hexagonal plate shape and six engaging claws are formed at equiangular positions on the outer periphery thereof, the stopper ring is formed in a rational shape, and a plurality of engaging claws are formed. It can Rukoto to have the same function in the claws.
The invention of claim 5, the engagement pawl formed in a substantially inverted L-shape, a notch groove is formed in the circumferential direction on the inner side of the engaging claw, elastically deformable form the engaging pawl into and out direction since the prompts elastic displacement of the engaging claw, can it to achieve a smooth operation of the stopper ring.

In the invention of claim 6, since the outer periphery of the engaging claw formed in a substantially inverted L shape is formed in a substantially chevron shape, and the pointed end portion of the outer periphery is formed so as to be detachable from the engaging groove, the engaging force is The stopper ring can be strengthened to prevent the rotation of the stopper ring, and can be released by the elasticity of the engaging claw so that the adjusting operation by the stopper ring can be performed smoothly and easily.
According to the seventh aspect of the present invention, since the stopper ring is made of a synthetic resin, the weight reduction and easy and inexpensive production can be realized, and appropriate adjustment can be given to smoothly perform the height adjustment operation by the adjuster. it can.
In the invention of claim 8, since the grounding member is a caster, movement of a table, a chair, furniture, or the like can be easily realized.

It is a perspective view which shows the usage type of the table for meetings to which this invention is applied. It is a front view of FIG. In the left view of FIG. 1, the use condition and folding state of a top plate are expanded and shown. It is a perspective view which decomposes | disassembles and shows the principal part of this invention. The principal part of this invention is decomposed | disassembled and expanded and is a perspective view which shows the assembly | attachment condition of the stopper ring in a leg end.

It is the top view which expands and shows the principal part of this invention, and has shown the condition after the assembly | attachment of the stopper ring in a leg end. It is sectional drawing which shows the principal part of this invention, and has shown the lowest position adjustment condition of the leg end thru | or a top plate. It is sectional drawing which shows the principal part of this invention, and has shown the highest position adjustment situation of a leg end or a top plate by the height adjustment by an adjuster.

The situation after the assembly of the stopper ring applied to the present invention is shown enlarged. It is a perspective view which shows other embodiment of the table for meetings to which this invention is applied.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 to FIG. 9, reference numeral 1 is a conference table, and the table 1 is applied to the height adjustment of the leg or top of the conference table. Is a horizontally long top plate 2, a pair of square frame reinforcing frames 3 that are spaced apart from each other in the length direction of the bottom surface of the top plate 2, and both ends of the reinforcing frame 3. A lower frame 4 made of a steel plate having a substantially inverted U-shaped cross section fixed to the lower surfaces of both ends of the steel plate, an aluminum die-cast joint member 5 having one end rotatably connected to an intermediate portion of the lower frame 4, A straight leg post 6 made of steel pipe connected to the other end of the joint member 5, and a substantially L-shaped leg post 8 made of steel pipe connected to the outside of the upper part of the leg post 6 via a connection fitting 7. And leg ends 9, 10 made of synthetic resin connected to the lower ends of the leg posts 6, 8, and rotatable about the axis of the leg ends 9, 10 It is deposited, and a caster -12,13, which is a ground member which can travel on the floor surface 11. In the figure, 8a is a synthetic resin cap attached to the upper end of the leg support 8.

The top plate 2 has a nut (not shown) embedded in a predetermined position inside, and a screw hole of the lower frame 4 is positioned in the communication hole, and a screw or a bolt is inserted into the screw hole and screwed into the nut. The lower frame 4 can be fixed to the lower surface of 2.
A plate-like bracket (not shown) is attached to the inside of the lower frame 4 adjacent to the joint member 5, and the bracket and the joint member 5 are rotatably connected via a pivot 14. A top plate 2 is rotatably connected to the center.
A rotating shaft (not shown) is rotatably supported by the lower frames 4 and 4, and the rotating shaft is urged to rotate in one direction via a torsion spring (not shown). Projecting to the outside of the lower frames 4, 4, the base end portion of the operation lever 15 is mounted on the projecting portion.

Two engaging grooves (not shown) are formed on the pivot shaft in the lower frame 4 so that a base end portion of a lock link (not shown) is rotatably supported and the other end portion is formed on the upper peripheral surface of the joint member 5. The top plate 2 can be formed in a horizontal state and a folded state by engaging the other end portion of the lock link with each engagement groove.
In the figure, 16 is a rectangular tube connecting frame spanned under the joint members 5 and 5, 17 is a protective cover for the lower frame 4, one end of which is cut out, and a joint is connected to the cut out portion. An upper end portion of the member 5 can be accommodated, and 18 is a storage shelf provided immediately below the top plate 2.

  The leg ends 9 and 10 are formed so that the leg end 9 is substantially straight tubular and the leg end 10 is substantially L-shaped, and they are substantially the same, and the upper ends thereof are formed on the leg struts 6 and 8. It is formed in a rectangular tubular shape whose diameter is reduced so that it can be fitted, and screws 19 are screwed and connected to appropriate positions of the reduced diameter portions 9a, 10a.

The lower ends of the leg ends 9 and 10 are formed in a truncated pyramid shape with a diameter decreasing downward, and a gently concave curved sliding surface 20 is formed in the vertical direction on the inner facing surface. The two engaging grooves 21 and 21 are spaced apart and formed in the up-down direction.
The center angle θ of the adjacent engaging grooves 21 and 21 is formed to be 1/6 rotation angle of the adjuster 25, that is, 60 °. Can be engaged with the engaging groove 21.

  In the figure, reference numeral 22 denotes a molding opening in which the upper surface of the intermediate portion of the leg end 10 is cut out, and a cap 23 is detachably attached to the opening 22. In this case, the leg end 9 has a substantially straight tube shape, and the upper end thereof is opened, so that the opening 22 does not exist.

A screw hole 24 is formed at the lower end of the leg ends 9 and 10, and a screw shaft 26 of an adjuster 25 made of synthetic resin is screwed into the screw hole 24 from below, and depending on the screwing amount, the leg ends 9 and 10 or the top plate The height from the floor surface 11 of 2 can be adjusted.
A locking shaft 27 having a locking surface protrudes from the upper end portion of the screw shaft 26, and a stopper ring 28 is hooked on the locking shaft 27, and a screw 29 is engaged from above the stopper ring 28. It is screwed into the screw hole 30 of the stop shaft 27.

  The stopper ring 28 is formed in a hexagonal plate shape made of synthetic resin, a locking hole 31 having the same shape as the locking shaft 27 is formed at the center thereof, and six engaging claws 32 are formed at equiangular positions on the outer side. In the embodiment, it is formed at a position of 60 °, and its rotation center angle θ is formed to be the same as the center angle θ of the engagement groove 21.

  The engaging claw 32 is formed in a substantially inverted L shape, and the outer peripheral surface thereof is formed in a substantially chevron shape, and a notch groove 33 is formed between the front end portion and the inner side surface and the outer peripheral surface of the stopper ring 28. The engaging claw 32 is formed to be displaceable inward and outward through the notch groove 33, and the engaging claw 32 can be engaged with and disengaged from the engaging groove 21.

  That is, the stopper ring 28 is disposed so as to be rotatable and slidable on the slidable contact surface 20. When the adjuster 25 is rotated by the operation of the adjuster 25, the sharp end 32 a on the outer periphery of the engagement claw 32 is formed in the engagement groove 21. Engage with each other to increase or decrease the height of the leg ends 9, 10 or the top plate 2.

  Therefore, for example, when the adjuster 25 is rotated once, the stopper ring 28 is synchronously rotated, and the height of the leg ends 9, 10 or the top plate 2 is moved up and down by one pitch of the screw shaft 26 of the adjuster 25. When the arm 25 is turned by 1/6, that is, by 60 °, the tip 32a of the engaging claw 32 is engaged with the adjacent engaging groove 21, and the height of the leg ends 9, 10 or the top plate 2 is adjusted with the adjuster 25. The screw shaft 26 is moved up and down by 1/6 pitch so that the rotation angle of the engagement position can be maintained.

A screw hole 34 is formed inside the screw shaft 26, and the screw hole 34 is opened on the lower surface of the operation plate 35 projecting from the lower end of the adjuster 25, and a concave hole 36 is formed in the opening.
A mounting bolt 37 protruding from the upper portion of the caster 13 is screwed into the screw hole 34 and tightened so that the adjuster 25 and the mounting bolt 37 are integrally movable.

A flange 38 is provided at the base of the mounting bolt 37, the flange 38 is received in the recessed hole 36 so as to be engageable, the adjuster 25 is supported on the flange 38, and the caster 13 is rotatably mounted. Yes.
In the figure, 37a is the head of the mounting bolt 37, 39 is a tongue-like locking piece formed on the inner peripheral surface of the reduced diameter portion 10a of the leg end 10, and a notch groove 40 is formed around the elastic piece. Thus, the locking piece 39 can be displaced in the plate thickness direction.

  An engaging protrusion 41 is provided on the front end of the locking piece 39 so as to protrude outwardly. The engaging protrusion 41 is provided so as to be engageable with a locking hole 42 formed on the inner peripheral surface of the leg column 8. 8, the leg end 10 can be easily connected. In this case, the same configuration is adopted for the leg end 9 corresponding to the leg support 6.

  The height adjusting device such as a table configured as described above has leg ends 9 and 10 that can be connected to the lower ends of the leg posts 6 and 8, and an adjuster that is attached to the lower ends of the leg ends 9 and 10 so as to be vertically movable. 25, a stopper ring 28 that prevents the adjuster 25 from rotating or moving up and down, and casters 12 and 13 that are grounding members capable of supporting the adjuster 25.

The leg struts 6 and 8 are manufactured by cutting a steel pipe of a predetermined size into a predetermined length and bending it into a straight tube or a predetermined shape.
The leg ends 9, 10 are resin-molded into a rectangular tube that can be attached to the lower ends of the leg posts 6, 8, and a plurality of engagement grooves 21 are formed in the upper and lower surfaces on the opposite inner surfaces, and the adjusters 25 on the lower part. The screw hole 24 into which the screw shaft 26 can be screwed is formed.

  Of these, an opening 22 is formed on the upper peripheral surface of the leg end 10 bent in a substantially L shape, and the opening 22 is closed by attaching a cap 23, while the substantially straight tubular leg end 9 is And a plurality of engaging grooves 21 are formed in the opposing inner surface in the vertical direction.

A screw shaft 26 and an operation plate 35 are resin-molded on the adjuster 25, a screw hole 34 is formed inside the screw shaft 26, a recess 36 is formed on the lower surface of the operation plate 35, and an upper end portion of the screw shaft 26 is engaged. A stop shaft 27 is projected and a screw hole 30 is formed therein.
The stopper ring 28 is resin-molded into a hexagonal plate shape, six inverted L-shaped engaging claws 32 are formed at equiangular positions on the outer peripheral portion thereof, and the outer peripheral portion of each engaging claw 32 is substantially mountain-shaped. And the pointed end portion 32 a is engageable with the engaging groove 21.
And the notch groove 33 is formed in the inner side ranging from the base part to the front-end | tip part of each engagement nail | claw 32, and the engagement nail | claw 32 can be displaced to an inner / outer direction.

  The casters 12 and 13 are provided with mounting bolts 37 that can be screwed into the screw holes 24, and are configured to be rotatable to the casters 12 and 13 with respect to the mounting bolts 37. I use it.

  As described above, the leg struts 6 and 8 have a simple configuration in which the locking holes 42 and 42 are formed at the lower end of the rectangular tube, and the leg ends 9 and 10 are resin-molded into a substantially L-shaped tube and a straight tube, Since the concave curved surface 20 and the two engaging grooves 21 and 21 are spaced apart from each other on the upper inner surface and formed in the vertical direction, and the screw hole 24 is formed in the lower portion thereof, conventional welding or screwing can be performed. No part or screw hole, complicated groove processing or shape processing is required, and these can be manufactured easily and inexpensively.

  The adjuster 25 includes a screw shaft 26 and an operation plate 35, and a screw hole 34 into which a mounting bolt 37 can be screwed is formed inside the screw shaft 26. A locking shaft 27 and a screw hole are formed at the upper end of the screw shaft 26. 30 is a simple configuration, as in the prior art, a complicated locking member to be mounted on the caster and the lower end portion of the leg and its component parts, and a complicated projecting projection of the braking portion to the operation plate 35 in a deformable manner. This can be manufactured easily and inexpensively without the need for molding.

In the case of assembling the height adjusting device using the component members thus manufactured, first, the adjuster 25 is attached to the leg ends 9 and 10.
In this case, the adjuster 25 and the leg ends 9 and 10 are prepared, the screw shaft 26 of the adjuster 25 is screwed into the screw hole 24 of the leg ends 9 and 10, and the upper end of the screw shaft 26 is placed inside the leg ends 9 and 10. Make it protrude.
In the embodiment, the entire region of the screw shaft 26 is screwed into the screw hole 24, and the upper end portion thereof is positioned at the highest position, so that the stopper ring 28 described later can be easily attached.

Next, the locking hole 31 of the stopper ring 28 is fitted to the locking shaft 27 at the upper end of the screw shaft 26, and a screw 29 is screwed into the screw hole 30 of the locking shaft 27 from above the stopper ring 28. Are fastened to fix the stopper ring 28 to the upper end of the screw shaft 26.
This situation is shown in FIG. 4 to FIG. 7, the tip portion 32a of the engagement claw 32 of the stopper ring 28 is engaged with the engaging groove 21, or can engage position.

Thereafter, the mounting bolt 37 of the caster 13 is screwed into the screw hole 24 inside the screw shaft 26 of the adjuster 25, and the caster 13 is firmly tightened to integrally connect the caster 13 to the adjuster 25.
This situation is as shown in FIG. 7, and the mounting bolt 37 of the caster 13 is screwed into the entire area of the screw hole 24, and the flange 38 at the base of the bolt 37 is engaged with the recess 36.
Thus, the adjuster 25, the leg ends 9, 10 and the caster 13 are assembled, and these assemblies are prepared for assembling the leg columns 6, 8.

When assembling the conference table 1 using such an assembly of casters 13, the assembly may be attached to the leg posts 6 and 8 of the conference table 1.
That is, the diameter-reduced portions 9a, 10a of the leg ends 9, 10 of the assembly are inserted into the lower ends of the leg posts 6, 8, and the engagement protrusions 41 are moved into the leg posts 6 by elastic displacement due to the springback of the locking pieces 39. , 8 are engaged with the locking holes 42 at the lower end portions, and after temporarily fixing them, screws 19 are screwed into the screw holes of the joint portions to be connected.

  After the connection, if the cap 23 is inserted into the opening 22 and attached, a series of assembly can be performed easily and quickly. The assembled situation is as shown in FIG. 7, and the assembled conference table 1 is as shown in FIGS.

The conference table 1 assembled in this way is supported by the left and right leg columns 6 and 8, and the load of each leg column 6 and 8 is supported by the adjuster 25 or the caster 13.
At that time, the mounting bolt 37 of the caster 13 is screwed into the screw hole 34 of the screw shaft 26 of the adjuster 25 and supported on the outside, and the screw shaft 26 is screwed into the screw hole 24 of the leg ends 9 and 10 to be outside. And the outside of the mounting bolt 37 is double supported.
Therefore, the support strength of the mounting bolt 37 is strengthened, and deformation and breakage due to a load during use of the conference table 1 can be prevented.

  In addition, since the upper end portion of the mounting bolt 37 is supported by being engaged with the sliding contact surface 20 or the engaging groove 21 via the stopper ring 28, the supporting strength of the mounting bolt 37 is enhanced, and deformation due to the load is performed. And prevent breakage.

  After the assembly of the conference table 1, the adjuster 25 is screwed into the back of the leg ends 9, 10, the upper end of the screw shaft 26 is located at the highest position, and the operation plate 35 is located at the lowest position. The flange 38 engages with the recess 36 to support the adjuster 25, the height h of the leg ends 9, 10 from the floor surface 11 is set to the lowest position, and the height of the top plate 2 from the floor surface 11 is set. Is set to the lowest position. This situation is as shown in FIG.

In order to adjust the height of the leg ends 9 and 10 and the height of the top plate 2 from such a situation, the operation plate 35 of the adjuster 25 is held and rotated, for example, counterclockwise.
In this way, the downward movement displacement of the screw shaft 26 is restrained by the caster 13 that contacts the floor surface 11, while the screw hole 24 that engages with the screw shaft 26 moves relatively upward along the screw shaft 26. The leg ends 9 and 10 move away from the operation plate 35 and move upward, and the height of the leg ends 9 and 10 or the top plate 2 from the floor 11 is adjusted to a high position.

In this way, when the leg ends 9 and 10 are moved upward and the bottom of the opening 22 comes into contact with the stopper ring 28, the upward movement of the leg ends 9 and 10 is stopped and the leg ends 9 and 10 through the floor 11 are stopped. The height H (H> h) of the top 2 is set to the highest position. This situation is as shown in FIG.
Therefore, by adjusting the amount of rotation of the operation plate 35, the height of the leg ends 9, 10 or the top plate 2 from the floor surface 11 can be adjusted to a desired position.

Thus, the height adjustment of the present invention can be performed easily and smoothly by rotating the operation plate 35 in an appropriate direction.
At that time, the stopper ring 28 is Dodo the rotation of the operation plate 35, the engagement tip 32a of pawl 32 engages with the sliding surface 20, rotating the operation plate 35 by the contact frictional force to the contact surface pressure While power is braked, the braking force is reduced by the inner and outer displacement of the engagement claw 32 by the elasticity and notched groove 33 of the stopper ring 28, easily and smoothly perform the rotational operation.
Therefore, it is possible to adjust easily and efficiently without requiring arm force as compared with the conventional one in which the cylindrical locking member is pushed down against the spring and rotated after releasing the engagement between the protrusion and the groove.

The height adjustment device of the present invention is enhanced, after adjustment, the tip portion 32a of the engagement claw 32 of the stopper ring 28 is engaged with the engaging groove 21 of the sliding surface 20, and the engagement by the elastic Therefore, the rotation of the stopper ring 28 is prevented, the change of the height adjustment position can be prevented, and the desired adjustment height can be maintained over a long period of time.

FIG. 10 shows another embodiment of the conference table 1 to which the present invention is applied, and the same reference numerals are used for the components corresponding to the above-described embodiment.
In this embodiment, a curtain plate 43 is attached to the front side of the conference table 1 so that the see-through from the front side can be blocked. In addition, the configurations and operations of the leg struts 6 and 8, the leg ends 9 and 10, the adjuster 25, the caster 13, and the stopper ring 28 are the same as those in the above-described embodiment.

  In each of the above-described embodiments, the leg ends 9 and 10 are connected to the lower ends of the leg posts 6 and 8. However, these may be integrally formed with the opening 22 left, and in this way, the parts The number of points is reduced, and the labor of connecting the leg ends 9 and 10 is eliminated, thereby simplifying the configuration and reducing the cost.

  As described above, the height adjusting device for a table or the like according to the present invention enhances the support strength of the caster mounting bolt provided at the lower end of the leg of furniture or the like, prevents its breakage or deformation, and Since the height of the top plate from the floor surface can be adjusted easily and reliably and the adjusted height can be maintained over a long period of time, it is suitable for implementation of tables, chairs, furniture, and the like.

1 Conference table 6, 8 Leg support 9, 10 Leg end 12, 13 Grounding member (caster)
21 engaging groove 24 screw hole

25 Adjuster 26 Screw shaft
28 stopper ring 32 engagement pawl 34 a screw hole 37 mounting bolts θ central angle, the rotational center angle

Claims (8)

A screw hole is opened in the lower surface of the leg end provided at the lower end of the leg column, and a screw shaft of an adjuster is provided in the screw hole so that the screw shaft can be screwed, and a mounting bolt that is rotatably attached to the grounding member is provided inside the adjuster. In a height adjustment device such as a table provided so as to be capable of being screwed and capable of adjusting the height of the lower surface of the leg end via the screwing amount of the screw shaft with respect to the screw hole , a plurality of engagement claws are provided at the upper end of the screw shaft. An apparatus for adjusting the height of a table or the like, characterized in that a stopper ring provided with a base plate is fixed and the engaging claw is provided so as to be engageable with an inner surface of a leg end . The height adjusting device for a table or the like according to claim 1, wherein a plurality of engaging grooves are provided on the inner surfaces of the leg ends facing each other, and an engaging claw is provided in the engaging groove so as to be engageable. The height adjusting device for a table or the like according to claim 2, wherein the engaging groove is formed along a moving direction of the screw shaft . The height adjusting device for a table or the like according to claim 2, wherein the stopper ring is formed in a substantially hexagonal plate shape, and six engaging claws are formed at equiangular positions on the outer periphery thereof . The engagement claws formed in a substantially inverted L-shape, a notched groove on the inner side of the engaging claw is formed in the circumferential direction, the engagement of the engagement claws in and out direction elastically displaceable-formed according to claim 4, wherein Table height adjustment device. The height adjusting device for a table or the like according to claim 5 , wherein an outer periphery of the engaging claw is formed in a substantially chevron shape, and a pointed portion of the outer periphery is formed so as to be detachable from the engaging groove. The height adjusting device for a table or the like according to claim 1, wherein the stopper ring is made of synthetic resin .   The height adjusting device for a table or the like according to claim 1, wherein the grounding member is a caster.

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