JP2532189Y2 - Height adjustment mechanism for tables, etc. - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height adjusting mechanism, such as a table, which can securely and firmly maintain an adjustment state and can be easily adjusted without requiring tools or arm strength.

[0002]

2. Description of the Related Art Conventionally, a height adjusting mechanism is provided on a conference table or a chair so that a table height or a seating height can be adjusted according to a user's preference. For example, Japanese Unexamined Utility Model Publication No. Sho 61-115705 discloses that an embedded nut is attached to a horizontally bent portion of a column of a table, a mounting bolt of a caster is screwed into the nut, and an adjustment handle is fixed to an upper end of the bolt. A height adjustment mechanism is shown in which a pair of lock members screwed to bolts are pressed against upper and lower surfaces of a horizontal bent portion to maintain an adjustment state.

However, in this conventional mechanism, the locking member has a poor effect of preventing the mounting bolt from being loosened. For example, the mounting bolt is easily loosened due to, for example, a foot contact with the locking member or vibration at the time of moving the table. There was a problem that the state was easily out of order

[0004]

SUMMARY OF THE INVENTION The present invention solves such a problem, and allows the adjustment state to be firmly and reliably held, and the height of a table or the like which can be easily adjusted without requiring tools or arm strength. It is an object to provide an adjustment mechanism.

[0005]

For this reason, the height adjusting mechanism for a table or the like according to the present invention has a nut fixed to the lower end of the leg and a mounting bolt screwable to the nut, which is rotatably erected. Attach the grounding member and the grounding member to the mounting bolt,
And a height adjustment mechanism such as a table provided with an adjustment handle capable of rotating the bolt, wherein the nut projects from the lower end of the leg, and a locking surface is provided along the screw shaft of the mounting bolt along the axial direction. A recess that can be engaged with a nut is provided on the upper surface of the adjustment handle, a locking claw that can be engaged with the peripheral surface of the nut is provided on the inner surface of the recess, and a mounting bolt is slid on the bottom of the recess. An engaging hole movably insertable is provided, an engaging surface engageable with the locking surface is formed in the engaging hole, and the adjustment handle is urged upward to firmly adjust the state of adjustment. It is characterized in that it can be securely held and can be easily adjusted without requiring tools or arm strength.

[0006]

The concave portion of the adjusting handle is engaged with the nut, and the locking claw provided on the inner side surface of the concave portion is engaged with the peripheral surface of the nut to prevent the adjusting handle from rotating. The mounting surface of the mounting bolt is engaged with the engaging surface of the engaging hole to prevent the mounting bolt from rotating. The mounting bolt is slidably inserted into the engagement hole, and the adjustment handle is urged upward to securely engage the recess with the nut, strengthening the rotation of both the adjustment handle and the mounting bolt. I do. The adjusting handle is formed to have a large diameter, and the imposition of an external force is restricted so that the turning operation can be performed without requiring arm strength.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a mobile conference table according to the present invention; FIG. Are fixed horizontally in the front-rear direction.
A caster 3 which is a ground contact member with the floor surface is mounted immediately below a.

A nut 4 is fixed to the lower surface of the lower leg 2a by appropriate means such as welding or the like.
Is screwed. In this case, the nut 4 is not limited to a hexagonal nut as shown, but may be a polygon such as a pentagon or an octagon, or an irregular shape such as an ellipse or a star, and has an engaging portion 4a on the peripheral surface. Any shape may be used.

The mounting bolt 6 is rotatably erected on the side of the caster 3 so that it and the caster 6 can freely rotate relative to each other, and flat locking surfaces 7, 7 are provided on both sides of the screw shaft 6a. A bolt head is formed along the axial direction, and a bolt head as a spring receiver 8 is disposed at a lower end thereof. in this case,
Instead of forming a plurality of locking surfaces 7 as shown in the drawing, a single locking surface may be used.

An adjustment handle 9 made of synthetic resin is disposed between the nut 4 and the spring receiver 8, and a recess 10 is formed on the upper surface of the handle 9 so as to be able to engage with the lower end of the nut 4. A plurality of locking claws 11 which can be engaged with the engaging portion 4a are provided on a side peripheral surface of the hook 10. In the center of the bottom of the concave portion 10, an odd-shaped engaging hole 12 into which the mounting bolt 6 can be inserted.
Are provided at positions opposed to the inner peripheral surface thereof.
And engagement surfaces 13 and 13 which can be engaged with.

A boss 14 protrudes downward from the lower surface of the adjustment handle 9, and a spring 15 is interposed between the boss 14 and the spring receiver 8. It is biased upward. In this case, a dedicated spring receiver composed of a flat washer or a countersunk washer may be installed on the upper surface of the spring receiver 8, and an appropriate position of the adjustment handle 9, for example, an arrow indicating the adjustment direction on the upper surface, UP and D
It is desirable to attach an indication such as OWN.

In the embodiment, the mounting bolt 6 is connected to the lower leg 2.
Although it is attached to a, it may be attached directly to the lower end of the leg support 2 having a straight rod shape. In addition, in the figure, 16 is a non-slip provided on the peripheral surface of the adjustment handle 9, 17 is a through hole formed at a predetermined position of the lower leg 2a, 18 is a curtain plate, and 19 is a cap attached to an end of the lower leg 2a. .

The height adjusting mechanism of a table or the like configured as described above forms a through hole 17 at a predetermined position on the lower end of the leg support 2, in this embodiment, at the lower surface of the lower leg 2a, when manufacturing the component.
The screw portion 5 is positioned on the outer opening edge of the hole 17, and the nut 4 is fixed by appropriate means such as welding. Further, locking surfaces 7, 7 are formed on the screw shaft 6a of the mounting bolt 6, and the bolt 6 is rotatably mounted on the caster 3, and the adjustment handle 9 is resin-molded to a predetermined size.

Next, when assembling these parts to the support leg 2, the leg support 2 is held in an appropriate posture, and a spring 15 and a spring 15 are attached to the screw shaft 6 a of the mounting bolt 6.
The adjustment handle 9 is inserted with the boss 14 facing the other end, and the shaft end is screwed into the screw portion 5 of the nut 4 projecting from the lower surface of the lower leg 2a by a predetermined amount.

The adjustment mechanism thus assembled is as shown in FIG. 3. The lower end of the nut 4 engages with the concave portion 10 of the adjusting handle 9, and the handle 9 is urged upward by the elasticity of the spring 15, and The engagement with the nut 4 is forcibly formed. In addition, the locking claw 11 is the engagement portion 4 of the nut 4.
a and the engagement surfaces 13, 13 of the engagement holes 12.
Engages with the locking surfaces 12, 12 of the screw shaft 6a to strengthen the detent of the adjustment handle 9 and the mounting bolt 6. The weight of the table is supported by the casters 3 via the mounting bolts 6, and is not imposed on the adjustment handle 9.

In order to adjust the height of the table under such circumstances, the adjustment handle 9 is pushed down against the elasticity of the spring 15 to release the engagement between the nut 4 and the recess 10 as shown in FIG. Then, while maintaining this state, the handle 9 is rotated in an appropriate direction. In this case, the adjusting handle 9 has a relatively large diameter, and no external force acts on the handle 9 other than the restoring force of the spring 15. No need.

In this case, the turning power of the adjusting handle 9 is transmitted to the screw shaft 6a via the engaging surfaces 13, 12 engaged with the engaging surfaces 13, 13, and the shaft 6a rotates. The amount of screwing into the nut 4 changes, and the nut 4
Is relatively changed, so that the table height is adjusted.

That is, when the screwing amount of the screw shaft 6a into the nut 4 increases, that is, when the screw shaft 6a protrudes upward from the nut 4, the adjusting handle 9 supporting the nut 4 moves downward, and the table height increases. Is adjusted downward, while the screw-in amount of the screw shaft 6a decreases, that is, when the protrusion amount of the screw shaft 6a above the nut 4 decreases, the adjustment handle 9 moves upward to raise the table height upward. Adjusted.

After the rotation operation, the adjustment handle 9
Is released, the handle 9 is pushed back upward by the elasticity of the spring 15, the concave portion 10 is engaged with the lower end of the nut 4, and the locking claw 11 is further engaged with the engaging portion 4a. Is prevented from rotating and recovers its original state.

When the table is pushed and moved after such height adjustment, the casters 3 rotate and run on the floor surface, and the casters 3 pivot about the mounting bolts 6. In this case, since the mounting bolt 6 is rotatably supported by the caster 3, the bolt 6 is
And the locking surfaces 7, 7 engage with the engagement surfaces 13, 13 of the adjustment handle 9, and
Since the locking claw 11 engages with the engaging portion 4a of the nut 4 and is prevented from rotating, the mounting bolt 6 does not rotate with the turning of the caster 3, and the adjustment state is maintained.

On the other hand, when the table is used, the adjustment handle 9 is used.
Is engaged with the engaging portion 4a of the nut 4, and the engaging surfaces 13, 13 are engaged with the engaging surfaces 12, 12 of the screw shaft 6a, even if the user contacts the user's feet or objects. At the same time, since the adjustment ring 9 is prevented from rotating, the adjustment state is firmly maintained.

As described above, the height adjusting mechanism of the present invention has an advantage that the adjustment state can be securely and firmly maintained, and the adjustment can be easily performed without requiring tools or arm strength. In addition, the present invention is not limited to a table, but is widely applied to office supplies such as chairs and desks that require height adjustment, OA equipment, home appliances, industrial machinery and equipment, regardless of whether they are movable or stationary. Can be.

[0023]

As described above, the height adjusting mechanism for a table or the like according to the present invention has a nut protruding from the lower end of the leg, and a concave portion engageable with the nut is provided on the upper surface of the adjusting handle. Since the locking claw that can be engaged with the peripheral surface of the nut is provided on the inner surface of the adjustment handle, the rotation of the adjustment handle can be reliably and firmly formed. In addition, a locking surface is formed in the screw shaft of the mounting bolt along the axial direction, and an engaging hole through which the mounting bolt can be slidably inserted is provided at the bottom of the recess, and the locking hole is provided in the engaging hole. Since the engagement surface that can be engaged with the surface is formed, the rotation stop of the mounting bolt can be strengthened. In addition, since the adjustment handle is urged upward to securely form the engagement between the locking claw and the nut, even if an impact or external force is applied to the adjustment handle or the mounting bolt, the rotation of the adjustment handle and the mounting bolt is prevented. It is firmly and securely maintained, and the state after height adjustment can be firmly and reliably held, so that the problem that the adjustment state easily goes wrong due to impact or contact at the time of use as in the past is solved Can be. Further, since the present invention can be operated by pushing down the adjustment handle and rotating it, there is a practical effect that the adjustment can be easily performed without requiring any special tool or arm strength.

[Brief description of the drawings]

FIG. 1 is a front view showing a situation in which the present invention is applied to a mobile conference table.

FIG. 2 is an enlarged perspective view showing a main part of the present invention.

FIG. 3 is a cross-sectional view showing a state after assembly of the present invention.

FIG. 4 is a plan view showing an example of an adjustment handle used in the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is an exploded perspective view showing a main part of the present invention.

FIG. 7 is a cross-sectional view showing a state at the time of height adjustment according to the present invention.

[Explanation of symbols]

 2a leg 3 ground member 4 nut 6 mounting bolt 6a screw shaft 7 locking surface 9 adjustment handle 10 concave portion 11 locking claw 12 engaging hole 13 engaging surface

Continuation of the front page (56) References JP-A-4-287704 (JP, A) JP-A-60-261704 (JP, A) JP-A-60-29304 (JP, A) JP-A-6-227206 (JP, A) , A) Japanese Utility Model Showa 63-43801 (JP, U) Japanese Utility Model Showa 61-101005 (JP, U) Japanese Utility Model Showa 59-83665 (JP, U) Japanese Utility Model 4-17060 (JP, Y2) Japanese Utility Model 7-321 (JP, Y2)

Claims (1)

(57) [Scope of request for utility model registration] 1. A nut fixed to a lower end portion of a leg, a grounding member having a rotatable mounting bolt screwable to the nut, a grounding member mounted on the mounting bolt, and rotating the bolt. In a height adjustment mechanism such as a table having a possible adjustment handle, the nut is projected from a lower end portion of a leg, and a locking surface is formed on a screw shaft of the mounting bolt along an axial direction, and the adjustment is performed. A concave portion engageable with the nut is provided on the upper surface of the handle, a locking claw engageable with the peripheral surface of the nut is provided on the inner surface of the concave portion, and a mounting bolt can be slidably inserted into the bottom of the concave portion. A height adjustment mechanism for a table or the like, wherein an engagement hole is provided, an engagement surface engageable with the locking surface is formed in the engagement hole, and the adjustment handle is urged upward.