JPS6335646Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a furniture height adjustment device that is used by being attached to the bottom of furniture such as various chests of drawers.

(Prior art and its problems) Conventional furniture height adjustment devices of this type include:
A device disclosed in Japanese Utility Model Publication No. 48-40863 is known, but this conventional device has a gear fixed to the upper end of a vertical screw shaft that is rotatably supported inside the main body. A horizontal rotary operation shaft having a gear fixed to the inner end that engages around the upper side is supported on the side wall of the main body.

That is, in the conventional device, a bearing means is provided below a gear fixed to the upper end of a vertical screw shaft to rotatably support the screw shaft in the main body. Therefore, even if the gear at the inner end of the rotary operation shaft is configured to engage with the lower periphery of the gear fixed to the upper end of the screw shaft, the overall height will increase and the furniture bottom architrave, which has a low height, will It cannot be installed inside. In addition, it also has the drawbacks of a large number of parts, a complicated structure, and high cost.

(Means for solving the problems) The present invention proposes a furniture height adjustment device that can solve the conventional problems as described above.
The feature is that a vertical spiral shaft with a large gear fixed to the upper end is placed inside the main body, which has a seat for mounting on the bottom of the furniture, and a small gear engages with the large gear below the periphery of the large gear. A horizontal rotary operation shaft having an inner end thereof is rotatably supported on the side wall of the main body, and a rotary operation part that can be operated from the outside of the main body is provided at the outer end of the rotary operation shaft, and the large gear The large gear and the screw shaft are rotatably supported by a thrust bearing interposed between the upper surface and the main body and the small gear, and an elevating body whose upper end is screwed onto the screw shaft is attached to the main body. The elevating body is supported so that it can only be moved up and down, and a floor abutting surface is provided at the lower end of the elevating body that projects downward from the main body.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

In Figures 1 to 4, 1 is the main body,
A vertical mounting seat 2 is provided on the side and a horizontal mounting seat 3 is provided on the top end as a seat for mounting to the bottom of the furniture. 4 is an elevating body, 5 is a screw shaft, 6 is a rotary operation shaft, 7 is a large gear using a bevel gear fixed to the upper end of the screw shaft 5, and 8 is a bevel gear used fixed to the inner end of the rotary operation shaft 6 It is a small gear. The main body 1 includes a lower half 1 having the vertical mounting seat 2.
a and an upper half portion 1b provided with the horizontal mounting seat 3, and both portions 1a and 1b are connected by screws 9 at three locations around the periphery.

The elevating body 4 has a nut-shaped member 12 having a female threaded hole 11 in the center fitted inside the upper end of the cylindrical member 10 and fixed with a screw 13, and a floor contact surface on the lower end of the cylindrical member 10. A seat plate 15 made of synthetic resin forming a seat plate 14 is fitted and fixed. This elevating body 4 is fitted and supported in the lower half part 1a of the main body so as to be movable up and down, and the head of the screw 13 protruding from the cylindrical member 10 is formed in a vertical guide groove inside the lower half part 1a of the main body. 16, the rotation of the elevating body 4 is reduced.

The screw shaft 5 screws the nut-shaped member 12 of the elevating body 4 into the female screw hole 11, and connects the upper surface of the large gear 7, which is fixed downward near its upper end, with the upper half of the main body adjacent thereto. A thrust bearing 17 is interposed between the portion 1b and the portion 1b. This thrust bearing 17 is arranged in a concentric ring shape with the screw shaft 5 between a ball receiving seat 17a fitted to the lower side of the upper half portion 1b of the main body, and the ball receiving seat 17a and the upper surface of the large gear 7. It is composed of a plurality of balls 17b. At the upper end of the screw shaft 5, there is a rotary operation unit 1 which is provided with a hexagonal hole 18a into which a hexagonal wrench is fitted and four recesses 18b into which a screwdriver is fitted.
8 is formed, and this rotary operation portion 18 is loosely fitted into the vertical through hole 1c provided in the upper wall of the upper half portion 1b of the main body.

The rotary operation shaft 6 is arranged in a horizontal direction perpendicular to the screw shaft 5, and has a main body lower half 1a and a main body upper half 1.
The small gear 8, which is rotatably supported between the small gear 8 and the thrust bearing 17 and is fixed to the inner end thereof, engages with the lower side of the large gear 7. The large gear 7 is sandwiched therebetween from above and below, and the large gear 7 and the screw shaft 5 are prevented from moving up and down and are configured to only rotate. The rotary operation shaft 6 is orthogonal to the mounting seat 2, and a rotary operation portion 19 is formed at its outer end, which includes a hexagonal hole 19a into which a hexagonal wrench is fitted and four recesses 19b into which a screwdriver is fitted. , this rotation operation section 19
is loosely fitted into a cylindrical protrusion 20 formed between the lower half 1a and the upper half 1b of the main body and protruding from the mounting seat 2. 21 and 22 are mounting holes provided in the mounting seats 2 and 3.

The height adjustment device 23 configured as described above is
As shown in FIGS. 2 and 5, at least one of the four inner corners of the architrave 24 provided at the bottom of furniture such as a chest of drawers, for example, near either the front left or right inner corner, or near both the front left and right inner corners. on the vertical mounting seat 2
is in contact with the inner surface 24a of the architrave 24 and the horizontal mounting seat 3 is in contact with the bottom surface 25 of the furniture body, and the mounting holes 21,
It can be attached with wood screws using 22. At this time, the architrave 24 is previously provided with a through hole 26 into which the cylindrical protrusion 20 protruding from the vertical mounting seat 2 is fitted. Since the elevating body 4 has been raised to the upper limit position as shown in the figure, the seat 15 is placed on the architrave 24.
does not protrude from the bottom edge of the

The through hole 26 opens on the front surface of the architrave 24, but in some cases, the through hole 26 may be provided on both left and right sides or the back surface of the architrave 24, and the cylindrical protrusion 20 may be inserted into the through hole 26. Height adjustment device 2 to fit
3 can also be attached inside the architrave 24.

When the furniture to which the height adjustment device 23 is attached as described above is installed in a predetermined position, if the furniture is tilted or unstable, the architrave 23
A rotary operation tool such as a hexagonal wrench, a Phillips screwdriver, or a flathead screwdriver is inserted through the through hole 26 provided in the hexagonal hole 19 of the rotational operation section 19.
a or the recess 19b, and the rotary operation shaft 6 is rotated by the tool. This rotation is reduced by the small and large gears 8 and 7 and transmitted to the screw shaft 5, and the rotation of the screw shaft 5 causes the elevating body 4 to move up and down. This lifting and lowering movement of the lifting body 4 moves the seat 15 to the architrave 24.
You can take it in and out from the bottom edge up and down to eliminate tilting and wobbling of the furniture.

Incidentally, a rotation operation section 18 configured at the upper end of the screw shaft 5
is used to raise and lower the elevating body 4 before the height adjustment device 23 is attached to furniture, and the elevating body 4 can be efficiently raised and lowered without using the deceleration gears 8 and 7. Of course, even when it is attached to furniture, the rotation operation part 1 at the bottom of the furniture
If a through hole is provided at a location corresponding to 8, it is also possible to directly rotate the screw shaft 5 using the rotation operation section 18 to move the elevating body 4 up and down.

(Operations and Effects of the Invention) The furniture height adjustment device of the present invention, which can be implemented as described above, is provided by interposing the device between the main body and the upper surface of the large gear fixed to the upper end of the screw shaft that drives the elevating body up and down. By sandwiching the large gear between a thrust bearing and a small gear that engages around the lower side of the large gear,
Since the screw shaft is supported so that it can only rotate, the number of parts is reduced, the structure is simpler, and it is less expensive, compared to the conventional case where the screw shaft 5 is supported only so that it can rotate at an intermediate position. Not only can the device be constructed as follows, but the overall height of the device can be significantly reduced without shortening the lifting stroke of the lifting body. That is, according to the present invention, it has been possible to obtain a compact and inexpensive height adjustment device that can be conveniently used by being attached to the inside of the low architrave at the bottom of furniture.

[Brief explanation of drawings]

Figure 1 is a longitudinal front view, Figure 2 is a partial longitudinal side view, Figure 3 is a partial cross-sectional plan view, Figure 4 is a rear view (the elevating body protruding downward from the main body is omitted), and Figure 5. is a front view showing the state of use. 1...Main body, 2, 3...Mounting seat, 4...Elevating body, 5...
Spiral shaft, 6... Rotation operation shaft, 7... Large gear (bevel gear), 8... Small gear (bevel gear), 12... Nut-shaped member, 14... Floor contact surface, 18, 19... Rotation operation part, 23... Height Adjustment device, 24... Architrave, 25... Bottom surface of the furniture body.

Claims (1)

[Scope of utility model registration request] A vertical screw shaft with a large gear fixed to the upper end is arranged in the main body, which is equipped with a seat for attachment to the bottom of the furniture, and a small gear that engages with the large gear on the lower side of the periphery of the large gear is placed on the inner end. A horizontal rotary operating shaft is rotatably supported on the side wall of the main body, and a rotary operating portion that can be operated from the outside of the main body is provided at the outer end of the rotating operating shaft, and the upper surface of the large gear and the The large gear and the screw shaft are rotatably supported by a thrust bearing interposed between the main body and the small gear, and the elevating body whose upper end is screwed onto the screw shaft can only be raised and lowered by the main body. A furniture height adjustment device that supports a furniture height adjustment device and includes a floor abutment surface provided at a lower end of the elevating body projecting downward from the main body.