JPS6140174Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a desk height adjustment device.

Conventionally, a lifting leg and a fixed leg are vertically installed under the left and right ends of a top plate of a desk, etc., a screw rod in the lifting leg is attached to a screw cylinder in the fixed leg, and the upper end of the screw rod is connected to a crank part. Various height adjustment positions have already been proposed in which the top plate is raised or lowered by rotating a handle provided at a predetermined position to simultaneously rotate the left and right screw rods.

However, in all of these, the top plate reinforcing material and lifting legs that hide the crank part and connecting rods on the underside of the top plate, and the crank part and screw rods are respectively fixed to the desk in the form of a gate. Therefore, if one part is damaged, the whole thing must be replaced, and when it is attached to a desk, it is too large and heavy for one person to work on, making it difficult to work with, making it difficult for factories to mass produce desks. This method has various disadvantages, such as not being suitable for the production line, and requiring a large amount of space to store height adjustment devices.

The present invention aims to improve the above-mentioned drawbacks, and its features include a member in which the crank part of the height adjustment device is set on the inner surface of the top plate reinforcing material, and screw rods set in the elevating and fixed legs. The structure is simple so that it can be separated into two parts and the two parts can be easily connected on a mass production line.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 shows a perspective view of a desk using the present invention, where 100 is the desk body, 1 is a top plate, 11 and 12 are top side plates attached to the left and right ends of the top plate 1, and 13 is a top plate 11. 14 is a cabinet; 2 and 3 are flat, rectangular cylindrical lifting legs with their lower ends open and hanging downwards on the lower surface of the left and right ends of the top plate 1; 4 and 5 are the upper ends of the drawer; A flat rectangular cylindrical fixed leg 6 that is open and hangs upwardly above the leg seats 15 and 16 and that can be fitted into the elevating legs 2 and 3 connects the left and right leg seats 15 and 16. It is a horizontal reinforcement material.

A handle 10 is provided on the lower rear surface of the top plate 1 and at the rear of the drawer 13, as shown in FIG.

As shown in FIGS. 2 and 3, the lifting legs 2 and 3 have their ends bent inward into an L-shape to form a flat rectangular tube shape as a whole, and cutouts 24 and 34 are formed on the inner surface of the upper end thereof. An elevating leg mounting piece 210 is fixedly protruding from the upper end.

Like the lifting legs 2 and 3, the fixed legs 4 and 5 have their ends bent inward into an L shape to form a flat rectangular tube shape as a whole.
Female screw portions 21 and 31 are fixed to the inner surface of the upper portion and have a size that can be inserted into the lifting legs 2 and 3. The female screw portions 21 and 31 have nut mounting members 22 and 32 fixed to the upper inner surfaces of the fixed legs 4 and 5, and nuts 2 fixed to the upper surfaces of the nut mounting members 22 and 32.
It is composed of 3 and 33.

And inside the lifting legs 2 and 3 and the fixed legs 4 and 5,
Screw into nuts 23, 33, nut mounting member 2
Screw rods 7 and 8 are attached that penetrate through the screws 3 and 33 and are movable while rotating up and down.

At the upper ends of the screw rods 7 and 8, there are rotating bearing sleeves 71 and 81.
are fixed thereto, and have washers 72, 82 having a larger diameter than the screw rods 7, 8 at the lower ends.
is attached removably.

The screw rods 7 and 8 have a rising stopper member 7 at the lower end.
After screwing together the female screw parts 21, 31 from above with the screw rods 7, 83 unattached, the screw rods 7, 8 prevents it from slipping out upwards.

The rotating shaft bearing sleeves 71, 81 attached to the upper ends of the screw rods 7, 8 have rotating shaft mounting holes 711, 811 formed at the center of the upper end, and the rotating shaft mounting holes 711, 8.
Connecting holes 712, 812 passing through 11 in the horizontal direction
When assembled, the upper end surfaces 713, 8
13 abuts on the lower surface of upward U-shaped receiving tube abutment seats 714 and 814 fixed to the lower part of the top plate reinforcing member 8.

As mentioned above, the lifting legs 2 and 3 and the screw rod 7 inside,
A leg set B is constructed by inserting the fixed legs 4 and 5 having the number 8 into each other.

The leg set B is located and attached to both left and right ends of the top plate reinforcing member 80.

The top plate reinforcing material 80 has an end bent upward into an L-shape to form a crank part mounting surface 82, top plate mounting pieces 83, 83, and a crank seat mounting surface 84,
A crank part 9 is attached inside. At the left and right ends of the crank part mounting surface 82, the support holes 821 of the crank part 9 are connected to the crank seat mounting surface 8.
4 are formed with locking holes 841 for locking the crank portion seats 85, and the top plate mounting pieces 83, 83 are formed with top plate mounting holes 831. The crank part 9 is
It is rotatably supported in the support holes 821 of the top plate reinforcing material 80, protrudes downward, and has a pin hole 91 at its tip.
lower rotary plates 92, 92 to which rotary shafts 91, 91 having diameters 1 and 911 are fixed to the center; locking protrusions 851, which are formed in a downward U-shape in cross section and lock into the locking holes 841; A mounting pin 8 is located on the inner surface of a crank part receiver seat 85 that has a mounting hole 852 on the upper surface, and is rotatably held in the mounting hole 852.
Upper rotating plate 9 with 53 and 853 fixed to the center
3, 93, and middle rotary plates 94, 94 located between the lower rotary plates 92, 92 and the upper rotary plates 93, 93.
, upper rotating plates 93, 93, and middle rotating plates 94, 94.
first crank rods 95, 95 connecting the free ends of the
, middle rotating plates 94, 94 and lower rotating plates 92, 92
from the center of the first crank rods 95, 95.
second crank rods 96, 96 connected at the same dimensional position opened by 90 degrees; first and second connecting rods 97 rotatably connecting the first crank rods 95, 95 and the second crank rods 96, 96 to each other; 98, and the above-mentioned upper rotary plate 93, lower rotary plate 92, middle rotary plate 94, and first and second crank rods 95, 96 at predetermined positions of the first and second connecting rods 97, 98. The upper handle rotating plate 93', the lower handle rotating plate 92', the middle rotating plate 94', and the first and second handle crank levers 95' and 96' are provided with the same structure, and are the same as the rotating shaft 91. Composition of handle rotation axis 9
1' is provided to protrude from the lower surface of the support hole 821 of the top plate reinforcing member 80.

The handle 10 is fixed to the lower surface of the top plate reinforcing member 80, has a knob 103 at the tip, and protrudes from the upper part of the rear end via a substantially L-shaped handle seat 102 with a handle support hole 101 in the lower surface. The handle rotation bearing sleeve 104 and the handle rotation shaft 91' are connected by a pin.

The handle rotation bearing tube 104 is connected to the screw rods 7 and 8.
Similar to the rotary bearing tubes 71 and 81 provided at the upper end of the
A handle rotation shaft mounting hole 105 is provided at the center of the upper end, and a connecting rod 106 that passes through the mounting hole 105 in the horizontal direction.
is making a profit.

The height adjustment device C, in which the crank part 9 and the top plate reinforcing material 80 are set as described above, has mounting holes 831 formed in the top plate mounting pieces 83 of the top plate reinforcing material 80 at predetermined positions on the rear surface of the top plate. Insert the screw into the screw and tighten it.

Next, the leg set B is positioned at the left and right ends of the tabletop reinforcement 80, and the lifting leg attachment pieces 210 fixed to the upper ends of the lifting legs 2 and 3 are screwed to the back surface of the tabletop 1. At this time, the rotating bearing sleeves 7 provided at the upper ends of the left and right threaded rods 7 and 8 in the leg set B are screwed to the back surface of the tabletop 1.
The rotating shafts 91, 91 protruding from the rear surface of the top plate reinforcement member 80 are fitted onto the rotating shafts 91, 91. The upper end surfaces of the rotating bearing sleeves 71, 81 are fitted onto the receiving sleeve abutment seats 714,
814, and the top plate 1 is secured to the top plate reinforcing member 80
Supported through.

Next, rotate the handle 10 using the rotating shafts 91, 91 (the rotation of the handle 10 will be
1 will be described later. )Rotary axis 9
1, pin holes 911, 911 made in 91 and connection holes 712, 81 made in rotary bearing sleeves 71, 81
2, and insert the connecting pins D and D' into the holes to connect them. In this case, if a spring pin is used, there is no need to prevent the pin from coming off.

When raising the top of the desk assembled as described above, when the handle 10 is rotated, the handle rotation shaft 91' and the lower handle rotation plate 92' fixed to the handle rotation shaft 91' are also rotated accordingly. , a second crank rod 96' attached to the free end of the lower handle rotary plate 92' at the same time, and a middle handle rotary plate 94' connected to the second crank rod 96';
and a first crank rod 95' of the middle rotary plate 94', and first and second connecting rods 9 to which the first crank rod 95' is attached and pivotally fixed to the crank portion seats 85...
7 and 98 move in the direction of rotation of the handle 10, and along with this, the first and second crank rods 95 and 96 of the crank portion 9 are rotated, and the lower rotating plate 92,
92 rotates together with the rotating shafts 91, 91 in the same direction. The rotation of the rotating shafts 91, 91 causes the screw rods 7, 8 to rotate, thereby raising and lowering the top plate.

In this embodiment, the crank part 9 is an upper, middle and lower rotating plate 9.
2, 93, 94 first and second crank rods 95, 96
Although it is composed of first and second connecting rods 97 and 98, it is not limited thereto, and any mechanism that allows the screw rods 7 and 8 to rotate at the same time may be used. That is, as long as the rotating shaft 91 connected to the screw rods 7 and 8 is provided so as to protrude downward, each modification is possible.

As described above, the present invention provides the screw rods 7 and 8 of the leg set B and the height adjustment part set C, which are each configured separately.
Since the structure is simple, just connect the crank parts 9 with the connecting pin D, it is very easy to assemble, can be manufactured at low cost, requires less inventory space, and is easy to inspect for malfunctioning parts. This can be easily done by simply removing the connecting pin and each screwed part, and there is no need to replace the failed part as in the past, making it a practical and useful idea.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, Fig. 1 is a perspective view of a desk equipped with the present invention, Fig. 2 is an exploded perspective view of main parts of the invention, and Fig. 3 is an outline taken along line A-A in Fig. 1. Partial sectional view. 1... Top plate, 2, 3... Lifting legs, 21, 31...
...Female thread part, 4, 5... Fixed leg, 7, 8... Screw rod, 71, 81... Rotating bearing tube, 711, 811
... Rotating shaft mounting hole, 712, 812 ... Connection hole,
80...Top plate reinforcement material, 821...Support hole, 9,9
... Crank part, 91, 91 ... Rotating shaft, 91
1,911...Pin hole, 99...Connecting rod, 10...
…handle.

Claims (1)

[Scope of utility model registration request] A telescopic lifting leg and a fixed leg are installed vertically on the lower left and right sides of the top plate of a desk, etc., a screw rod is provided inside the lifting leg, and a female screw part that is screwed into the screw rod is fixed to the upper part of the fixed leg. The upper ends of the left and right screw rods are connected to a crank part provided on the underside of the top plate, a handle is provided at a predetermined position on the connecting rod of the crank part, and by rotating the handle, the left and right screw rods are rotated, and the top plate of a desk, etc. In the height adjustment device for a desk or the like, the crank part has a rotating shaft that passes through the support hole of the top plate reinforcing material and has a pin hole at its tip.
It is attached so as to protrude downward from the lower surface of the top plate reinforcing material, and has a larger outer diameter than the support hole at the upper end of the screw rod, has a rotating shaft mounting hole in the center, and passes through the rotating shaft mounting hole. Then, by fixing a rotary bearing tube that has a connecting hole that matches the pin hole in the installed state and whose upper end abuts the lower surface of the top plate reinforcement, the crank part and the screw rod are connected by a connecting pin. A height adjustment device for desks, etc., which is characterized by: