JPH0113363B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a height adjusting device for legs of a table or the like.

A conventional leg height adjustment device consists of a tube member having a number of holes in the height direction, which is telescopically fitted into another tube member, and a bolt is inserted into one of the holes in the tube member to adjust the height. It was intended to set the For this reason, the work of loosening and tightening the bolts and aligning the positions of the holes is extremely troublesome, and the bolts and many holes are exposed to the outside, resulting in a disadvantage that the appearance is poor.

In addition, as shown in Japanese Utility Model Application Publication No. 52-79216, a plurality of annular recesses are formed at several locations in the longitudinal direction of the inner tube member, and two semi-cylindrical hollow cylinders are inserted into any of the annular recesses. A height adjustment device has also been proposed in which the annular body is formed by selectively fitting the annular body into the outer pipe member, but each time the height is adjusted, the inner pipe member is connected to the outer pipe member. It has the disadvantage that it is very troublesome as it requires time and effort to pull it out from the pipe member and refit it again.

This invention solves the above-mentioned conventional drawbacks,
A pair of inner and outer tube members constituting the legs are fitted together so that they can expand and contract, and a retaining plate having a plurality of notches along the longitudinal direction is fixed to the inside of the outer tube member, and a hook plate having a plurality of notches is fixed to the inner tube member in the longitudinal direction. A latch that can be latched into a notch in the latching plate is provided at one end of a rotatable latch shaft provided along the shaft, and a lever is integrally and rotatably connected at the other end of the latch shaft. . As a result, by rotating the lever, the latch is engaged with or detached from the notch in the latching plate, and the pair of inner and outer pipe members can be fixed at appropriate positions or extended and retracted, and the height can be adjusted. In addition to simplifying the structure, the height of each leg can be adjusted simultaneously by operating the levers of a plurality of legs at the same time using a single operating member.

Hereinafter, a detailed explanation will be given according to the drawings. In FIGS. 1 and 2, 10 is the top plate of the table;
20 is a curtain plate framed in a rectangular shape below the top plate,
30 is a leg. The leg 30 is composed of a pair of inner and outer cylindrical tube members 31 and 32 that are fitted together so as to be expandable and retractable.
The inner tube member 31 is inserted into the corner portions of the two curtain plates 20, 20, and is attached by screws 23 to the connecting plate 22 spanning between the two curtain plates.

In Figures 1, 4 and 5, 33,3
Reference numeral 3 designates two hanging plates fixed to the inner surface of the outer pipe member 32 by welding in a diametrically opposed manner, each of which has a plurality of hanging plates spaced apart on one side extending along the longitudinal direction of the pipe member. It has a notch 33a...

Bearing plates 34 and 35 are fixed to both upper and lower ends of the inner tube member 31, and 36 is a latch shaft rotatably provided across the bearing plates 34 and 35. 3
Reference numeral 7 designates a latch fixed to the lower end of the latch shaft 36, the tip of which protrudes outward through a plurality of protrusions 34a provided on the lower surface of the bearing plate 34, and when the latch shaft 36 rotates, the latch plate 33 It is engaged with and released from the notch 33a. The latch shaft 36 is always biased by a spring 39 suspended on a pin 38 projecting from its upper end in a direction in which the latch 37 is engaged with the notch 33a.

In FIGS. 1, 2, and 5, reference numeral 40 denotes a lever provided at the upper end of the latch shaft 36 so as to be rotatable with respect to the latch shaft 36. the spring 39
When the lever is rotated in a direction that opposes the action of the latch shaft 36, the latch shaft 36 also rotates.

In FIGS. 1 and 4, a compression spring 44 is installed between the lower end of the inner tube member 31 and the inner bottom of the outer tube member 32, and biases both tube members in the direction of extension. The upper end of this spring 44 abuts against the protrusion 34a of the bearing plate 34 so as not to impede the rotation of the latch 37. This spring is connected to both pipe members 31 and 3.
2 may be replaced with a tension spring that biases in the shortening direction.

In FIGS. 1 and 3, reference numerals 45 and 45 denote guide pieces fixed to the outer surface of the inner pipe member 31 by welding, and slidably contact the side edges of the hanging plate 33.
Rotation of the outer tube member 33 with respect to the inner tube member 31 is prevented. In FIG. 1, reference numeral 46 denotes a synthetic resin bushing fitted to the upper end of the outer tube member 33, which slides and guides the inner tube 31.

In the above configuration, the lever 40 is
When the latch shaft 36 rotates against the spring 39, the latch 37 similarly rotates in the direction of the arrow A, and the latch plate 37 rotates in the direction of the arrow A in FIG. 33 from the notch 33a. This allows the outer tubular member 32 to slide relative to the inner tubular member 31 and can be extended under the action of the spring 44 or shortened against the action of the spring 44. Lever 4
0 in the free state and slide the latch 37 along the locking plate 33 under the action of the spring 39, the latch 37 will fall into the notch 33a, and the outer pipe member 32 will be in the expanded/contracted position. to be fixed. If you want to change the height further, just repeat the above operation.

Further, according to the present invention, the height of a plurality of legs configured as described above can be adjusted at the same time.

In FIGS. 1, 2, and 6, reference numeral 41 denotes a connecting rod that connects the levers 40 of each leg 30 with each other, and the two notches 31 provided in the upper part of the pipe member 31.
extending through a. In FIG. 6, reference numeral 42 denotes an operating member connected in the middle of one connecting rod 41, and is rotatably attached to a mounting plate 43 fixed to the inner surface of the curtain plate 20. By operating this operating member 42, the levers 40 of each leg can be rotated at the same time, and the height of the legs 30 can be adjusted. If it is desired to shorten the legs 30, the entire table may be pushed down against the action of the springs 44.

As described above, according to the present invention, the height of the legs can be easily adjusted by rotating the lever, and since the latch and the latch plate are not exposed to the outside, a beautiful appearance can be achieved. Furthermore, the height of each leg can be adjusted at the same time by operating the levers of the plurality of legs simultaneously using one operating member. Therefore, the height of the legs of a table or the like can be easily and quickly adjusted without the trouble of individually operating each lever for each of a plurality of legs.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of the leg portion of a table embodying the present invention, Fig. 2 is a plan view of Fig. 1 with the top plate removed, Fig. 3 is a sectional view taken along the line 3-3 in Fig. 1,
4 is a sectional view taken along line 4-4 in FIG. 1, FIG. 5 is a perspective view schematically showing the mechanism, and FIG. 6 is a plan view of the entire table excluding the top plate. Explanation of symbols: 30 is a leg, 31 is an inner pipe member,
32 is an outer pipe member, 33 is a locking plate, 33a is a notch, 36 is a latch shaft, 37 is a latch, 40 is a lever, 41 is a link, 42 is an operating member, and 44 is a spring.

Claims (1)

[Scope of Claims] 1. In order to configure a plurality of extensible legs 30, a plurality of pairs of inner and outer tube members 31, 32 are fitted in an expandable manner, and the tube members 31, 32 of each leg are extended. a spring 44 that is always biased in the direction or shortening direction; and a plurality of notches 3 provided on the inner surface of the tube member 32 on the outside of each leg along the longitudinal direction of the tube member 32.
a latch shaft 36 provided along the longitudinal direction of the inner tube member 31 and rotatable about an axis substantially parallel to the longitudinal axis of the inner tube member 31; a latch 37 that is rotatably provided at one end of the shaft 36 integrally with the latch shaft 36 and that can be latched to the notch 33a of the locking plate 33 by rotation thereof; and the other of the latch shaft 36. A lever 40 is integrally and rotatably connected to the latch shaft 36 at the end of the lever, and an operating member 42 is connected to the lever 40 of each leg via a connecting rod 41. The latches 37 of each leg are simultaneously latched or detached from the notch 33a of the latching plate 33, and the pipe members 31, 32 of each leg are
A device for adjusting the height of legs of a table or the like, which can be fixed at an appropriate expansion/contraction position or can be expanded/contracted according to the action of a spring 44 or against the action of the spring 44.