JPH033230Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a furniture height that is attached to the bottom corner of furniture to prevent the rattling of various types of furniture installed on the floor. This invention relates to an adjustment device.

(Prior art and its problems) The present applicant previously proposed a so-called screw jack type furniture height adjustment device. That is, a vertical rotating screw shaft whose upper end is supported within a furniture mounting case and whose lower end has a stopper for preventing the lifting body from coming off;
Although we have proposed a furniture height adjustment device that includes an elevating body screwed onto this screw shaft, a base attached to the lower end of this elevating body, and means for rotating the screw shaft, this conventional furniture height adjustment device has been proposed. The adjustment device had a structure in which the nut of the elevating body had to be screwed onto the screw shaft from the top end of the screw shaft, so it was necessary to have a straight small diameter shaft section at the top end of the screw shaft. However, there was a drawback that the support structure of the upper end of the screw shaft was restricted.

(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 the elevating body is composed of a nut consisting of two parts that sandwich the screw shaft from both the left and right sides, and a cylindrical body that is externally fitted and fixed to the nut, and that protrudes laterally from the upper end of the nut. The second feature is that the rotation preventing protrusion is fitted into the elevating guide groove formed in the case.

(Embodiment) An embodiment of the present invention will be described below based on the attached illustrative diagrams. 1 is a furniture mounting case;
3 is a screw shaft, 3 is an elevating body, 4 is a base, and 5 is a rotating operation means for the screw shaft 2. The case 1 is composed of a case main body 6 and a case cover 7 that fit vertically into each other, and after assembly is completed, the fitting portions between the two are joined together by a suitable method such as high frequency welding. The screw shaft 2 has an upper end small diameter shaft portion 8;
A large diameter bearing seat 9, a square shaft portion 10, a screw shaft portion 11 of a required length, and a stopper 12 for preventing the lifting body from falling off are integrally molded in this order.

The elevating body 3 is composed of a nut 13 that is screwed onto the helical shaft portion 11 of the helical shaft 2, and a cylindrical body 14 of a required length that is externally fitted and fixed to the nut 13. The nut 13 further protrudes from a flange portion 15 against which the upper end of the cylindrical body 14 comes into contact, a circumferential annular groove 16 covered by the cylindrical body 14, and two locations in the diametrical direction of the flange portion 15. It has a rotation prevention protrusion 17 and is divided into two left and right parts at a position passing through the axis, and each half part 13a, 13
The opposing surface of b is provided with a protruding pin 18 and a pin fitting hole that fit into each other when the two halves 13a and 13b are brought into contact with each other. The cylindrical body 14 is a nut in which two half-split parts 13a and 13b are opposed to each other by fitting a protruding pin 18 into a pin fitting hole so as to sandwich the helical shaft portion 11 of the screw shaft 2. 13, the nut 13 is fitted outwardly from below so that the upper end is in contact with the flange portion 15 of the nut 13, and at multiple locations in the circumferential direction corresponding to the annular groove 16,
By partially pressing the cylindrical body 14 inward, a plurality of retaining protrusions 14a in the circumferential direction that fit into the annular groove 16 are formed, and the nut 13 and the cylindrical body 14 are integrated. ing. In addition, although a tongue piece formed by a U-shaped notch is pressed inward as the retaining protrusion 14a,
The spherical protrusion may be pressed without providing a notch.

The base 4 is a disc-shaped member that is fitted and fixed to the lower end of the cylindrical body 14 of the elevating body 3. 19 is a washer interposed between the lower end of the cylindrical body 14 and the base 4.

The screw shaft rotation operating means 5 includes a large bevel gear 20 which is tightly fitted to the bearing seat 9 and the square shaft portion 10 from the side of the stopper 12 for preventing the screw shaft 2 from coming off from the lifting body so as to prevent relative rotation. A small bevel gear 21 meshing with the large bevel gear 20, a tool fitting groove 22 formed on the end surface of the upper small diameter shaft portion 8 of the screw shaft 2, and a tool fitting groove 22 formed on the end surface of the main shaft portion 21a of the small bevel gear 21. The tool fitting groove 23 is made up of a tool fitting groove 23. The small bevel gear 21 is loosely fitted into a bevel gear positioning recess 24 formed in the case body 6, and the main shaft portion 21a is
It is supported perpendicularly to the screw shaft 2 by a bearing portion 25 formed at the boundary between the case body 6 and the case cover 7. Reference numeral 21b is a countershaft of the small bevel gear 21 that projects on the opposite side from the main shaft 21a, and is loosely fitted into a bearing recess 26 formed in the case body 6. 27 is a thrust bearing interposed between the bearing seat 9 of the screw shaft 2 and the case cover 7 facing directly above the bearing seat 9,
A bearing receiving plate 28 is located between the case cover 7 and the case cover 7.
is interposed.

The elevating body 3, which is screwed into the helical shaft portion 11 of the screw shaft 2 via the nut 13, is fitted into a vertically penetrating guide hole 29 formed in the case body 6 so as to be able to rise and fall. An elevating guide groove 30 is formed in which the rotation preventing protrusion 17 of the nut 13 fits.

31 is a side mounting seat connected to the case body 6, and 32 is a top mounting seat connected to the case cover 7.

The height adjustment device for furniture of the present invention configured as described above is attached to the bottom corner of the furniture using the side mounting seat 31 or the top mounting seat 32. By lowering the base 4 and pressing it against the floor surface, the furniture is prevented from wobbling, but the height of the furniture can be adjusted by raising and lowering the base 4 using the tool fitting groove 23 of the small bevel gear 21. small bevel gear 2
1, and the rotation of the small bevel gear 21 is transmitted from the large bevel gear 20 to the helical shaft 2 via the square shaft portion 10 of the helical shaft 2, or the tool fitting groove 2 at the upper end of the helical shaft is rotated.
2 to directly rotate the screw shaft 2 and lift the elevating body 3.
This is done by moving up and down. At this time, the nut 13 constituting the elevating body 3 is in a state where it can only be raised and lowered because the rotation preventing protrusion 17 is fitted into the elevating guide groove 30 on the case body 6 side, so it is integral with the screw shaft 2. There is no mutual rotation.

(Operations and Effects of the Invention) According to the furniture height adjustment device of the present invention which can be implemented as described above, there is no need to fit the nut constituting the elevating body from one end of the screw shaft. This is a screw shaft that has parts larger in diameter than the screw shaft, such as a bearing seat and a square shaft for stopping bevel gear rotation, integrally molded on the upper end, and a stopper for preventing the elevating body from falling off on the lower end. can be used. Therefore, in order to allow the screw shaft to rotate smoothly, the upper end of the screw shaft is directly supported by a thrust bearing, and the large support reaction force acting on the screw shaft is transmitted to the joint between the screw shaft and the bevel gear, and There is no need to act on the bevel gear itself.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view, Fig. 2 is a longitudinal front view, Fig. 3 is a plan view, Figs. 4 and 5 are cross-sectional plan views,
FIG. 6 is a partially longitudinal side view in an exploded state. 1... Furniture mounting case, 2... Spiral shaft, 3
... Elevating body, 4... Base, 5... Rotating operation means for the screw shaft 2, 9... Bearing seat, 10... Square shaft portion, 11... Spiral shaft portion, 12... For preventing the elevating object from coming off. Stopper, 13...Natsuto, 13a, 13b
... Half-split part, 14 ... Cylindrical body, 17 ... Rotation prevention protrusion, 20 ... Large bevel gear, 21 ... Small bevel gear, 22, 23 ... Tool fitting groove, 27 ... Thrust bearing, 30... Lifting guide groove, 31,3
2...Mounting seat.

Claims (1)

[Scope of utility model registration request] a vertical rotating screw shaft whose upper end is supported in a furniture mounting case and whose lower end has a stopper for preventing the lifting object from coming off; a lifting object screwed onto the screw shaft; a base attached to the lower end of the lifting object; The elevating body includes a rotation operating means for the screw shaft, and the elevating body is composed of a nut consisting of two parts that sandwich the screw shaft from both left and right sides, and a cylindrical body externally fitted and fixed to the nut, and the upper end of the nut A height adjusting device for furniture comprising a rotation preventing protrusion projecting laterally from the case and fitting into a lifting guide groove formed in the case.