JPH0899798A - Elevator device - Google Patents

Abstract

PURPOSE: To secure the strength and the rigidity of the whole body of the device, by forming an elevating unit with a driving motor to give the rotating force to a screw rod through a gear box, and rotatable in the regular and the reverse directions; and a pair of the left side and the right side elevating bodies screwed to the screw rods, and combined to inner rails. CONSTITUTION: To the left side and the right side screw rods 19, box form elevating bodies 37 and 37 are screwed, the elevating bodies 37 and 37 are fixed to the rail main bodies 15a of the inner rails 15 with machine screws through installing brackets 39, and the elevating bodies 37 are made possible to move vertically by the regular and the reverse operations of the screw rods 19. Furthermore, to the installing brackets 39 to combine the elevating bodies 37 to the inner rails 15, elevating plates 45 are installed, and the whole body of the device is made in a unit. Consequently, the elevating plates 45 are raised by operating the screw rods 19 regularly, while the elevating plates 45 are lowered by operating the screw rods 18 reversely, so as to allow their vertical movement. Since the upper ends of the screw rods 19 are held by guide members 11, and the lower ends are held by a base plate 1, so as to hold the both ends, the strength and the rigidity of the whole body of the device are secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device for vertically moving an OA device or the like on a desk upper surface to a use state and a lowered storage state.

[0002]

2. Description of the Related Art Conventionally, an OA device used as a teaching material is stored in a desk when it is not used, and when it is used, it is raised to the upper surface of the desk for use.

[0003]

As described above, when the OA equipment is raised or lowered on the desk to be stored, it is carried out by the elevating device incorporated in the desk.

The lifting device is assembled inside the desk, and the frame of the desk is used as a strength member of the lifting device. The lifting device and the desk are set in an integrated relationship, and the lifting device is dedicated to the desk.

Further, in the elevating device, since each functional component is assembled to the frame of the completed desk, the assembling is troublesome and time consuming, which is not desirable in terms of assembling.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a lifting device which is excellent in assembling property, strength and rigidity and has versatility.

[0007]

In order to achieve the above-mentioned object, the present invention is a left and right guide member which is erected on both sides of a base plate and which comprises an outer rail and an inner rail which moves up and down in the outer rail. An upper end portion via the bracket and the guide member side, and a lower end portion is rotatably supported at both ends on the base plate side via a gear box, and left and right screw rods erected along the guide member, A lifting / lowering unit is composed of a forward / reverse rotation drive motor that applies rotational power to the screw rod through the gear box, and a pair of left and right lifting bodies that are screwed to the screw rods and are coupled to the inner rail.

[0008]

According to such a lifting device, one of the upper and lower ends of the screw rod for vertically moving the lifting body is supported by the left and right guide members, and the other is supported by the base plate. can get. Moreover, since it is an independent unit, the assembly can be completed quickly by assembling it as it is.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings of FIGS.

In FIG. 1, reference numeral 1 denotes a base plate of the lifting device 3. The base plate 1 has a front plate 5 that rises shortly upward, a rear plate 6, and left and right side plates 7, 7, and mounting holes 9 are provided in the left and right side plates 7, respectively. Base plate 1
Left and right guide members 11, 11 are provided upright inside the side plates 7 on both sides.

The guide member 11 is composed of an outer rail 13 formed in the shape of a C-shaped channel facing inward, and an inner rail 15 which moves up and down in the outer rail 13. The inner rail 15 has a flange portion 1 extending outward from a rail main body portion 15a formed in a U-shaped cross section as shown in FIG.
5b is bent, and a plurality of sliders 17 that slide in the outer rail 13 are attached to the flange portion 15b.

Inside the left and right guide members 11, vertically long screw rods 19, 19 are arranged. The upper end of the screw rod 19 is rotatably supported by an upper bracket 21 fixed to the outer rail 13 side of the guide member 11, and the upper bracket 21 is provided with a mounting hole 23.
The lower end of the screw rod 19 is rotatably supported by the gear box 25, and a bevel gear 27 is attached to the end of the screw rod 19 extended into the gear box 25. This bevel gear 27 is a gear box 25.
It meshes with the bevel gear 29 incorporated therein.

The outer side of the gear box 25 is the guide member 1
1, the outer rail 13 side, the bottom side is the base plate 1
Drive motors 29 capable of rotating in the normal and reverse directions are mounted on the gear box 25 (on the right side in the drawing) which is fixed to each side and functions as a base side strength member of the guide member 11.

The bevel gear 29 in the gear box 25, in which the drive motor 29 is mounted, is connected to the drive motor 29 via a speed reducing mechanism 31 composed of a worm and a worm wheel.
While the rotating power from the drive motor 29 is applied to the bevel gear 29 in the other gear box 25 via the transmission shaft 33.

The drive motor 29 is a DC motor which operates at a DC voltage of 12 V, and its operation is controlled by a control unit 35 arranged at a substantially central portion of the base plate 1.

The control unit 35 has a conversion function of converting alternating current into direct current and a function of turning on / off the drive motor 29 based on detection signals from first and second detection sensors S1 and S2 described later. .

On the other hand, the left and right screw rods 19 are screwed with box-shaped lifting bodies 37, 37, and the lifting body 37 is screwed to the rail main body portion 15a of the inner rail 15 via a mounting bracket 39. It has been stopped 41. As a result, the elevating body 37 can move up and down by the forward or reverse rotation of the screw rod 19, and the uppermost position of the elevating body 37 is detected by the first detection sensor S1 provided on the guide member 11 side. The lowest position is detected by the second detection sensor S2 provided on the guide member 11 side, and the detection signals from the first and second detection sensors S1 and S2 are the control unit 35.
It is designed to be input to.

The mounting bracket 39 for connecting the lifting body 37 to the inner rail 15 includes a support bracket 43.
The elevating plate 45 is attached via the, and the entire apparatus is configured as a unit.

According to the elevating device 3 thus constructed, when the screw rod 19 is normally rotated by the drive motor 29, the elevating body 37, that is, the elevating plate 45 is raised. Further, when the screw rod 19 is reversed, the lifting body 37, that is, the lifting plate 45 is lowered, and the lifting plate 45 can be moved up and down. During operation of the lifting plate 45, the upper end of the screw rod 19 is supported by the guide member 11 and the lower end is supported by the base plate 1 at both upper and lower ends. Up and down movement can be obtained.

Further, since the whole shape is a unit, for example, as shown in FIG. 4, when assembling the elevating device 3 inside the desk 49, the upper bracket 21 is attached to the desk 49 via the mounting hole 23. The side plate 7 of the base plate 1 is bolted to the frame 53 of the desk 49 through the mounting hole 9 while being bolted to the top plate 51 of No. 1, so that the mounting can be completed quickly. In this case, higher strength and rigidity can be obtained in combination with the frame 53 of the desk 49.

[0021]

As described above, according to the lifting device of the present invention, since it is a unit, the assembling property is excellent, and the strength and rigidity of the entire device can be secured by the guide member. Stable vertical movement of the lifting body can be obtained.

Further, since the use as the lifting device is not specified, it becomes versatile.

[Brief description of drawings]

FIG. 1 is a schematic front view of an entire lifting device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view of a lifting device.

FIG. 4 is an explanatory view showing an example in which a lifting device is incorporated in a desk.

[Explanation of symbols]

 1 Base Plate 11 Guide Member 13 Outer Rail 15 Inner Rail 19 Screw Rod 21 Bracket (Upper Bracket) 25 Gear Box 29 Drive Motor 37 Elevator

Claims (1)

[Claims] 1. A left and right guide member which is erected on both sides of a base plate and which is composed of an outer rail and an inner rail which moves up and down in the outer rail, and an upper end portion of which is on the guide member side via a bracket and a lower end portion. Is rotatably supported at both ends on the base plate side via a gear box, and the left and right screw rods are provided upright along the guide member, and the normal rotation for giving rotational power to the screw rod via the gear box. An elevating device comprising a reversible drive motor and a pair of left and right elevating bodies screwed to each screw rod and coupled to the inner rail.