JP2740128B2 - lift device - Google Patents

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 moving an OA device or the like up and down on a desk top surface and a storage state where the OA device is lowered.

[0002]

2. Description of the Related Art Conventionally, OA equipment used for teaching materials and the like is stored in a desk when not in use, and is used by being raised above the desk when used.

[0003]

As described above, when the OA equipment is raised above the desk or lowered and stored, it is performed by a lifting device incorporated in the desk.

[0004] The elevating device is assembled inside the desk, and uses the frame of the desk as a strength member of the elevating device. The elevating device and the desk are set as an integral relationship, and are a dedicated elevating device for the desk.

[0005] In addition, the elevating device assembles each functional component to the completed desk frame, which is troublesome and time-consuming to assemble, which is not desirable in terms of assemblability.

Accordingly, an object of the present invention is to provide an ascending / descending device which is excellent in assemblability and strength / rigidity and has versatility.

[0007]

In order to achieve the above object, the present invention provides a left and right guide member comprising an outer rail erected on both sides of a base plate, and an inner rail moving up and down in the outer rail. An upper end portion is supported by the guide member side via a bracket, and a lower end portion is rotatably supported at both ends by a gear box on a base plate side, and right and left screw rods erected along the guide member, and The drive unit is a lifting / lowering unit that includes a forward / reverse rotation drive motor that applies rotational power to the screw rod via a gear box, and a pair of left and right lifting members screwed to each screw rod and coupled to the inner rail.

[0008]

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

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to 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. Mounting holes 9 are provided in the left and right side plates 7, respectively. Base plate 1
Left and right guide members 11 and 11 are provided upright on the inside of the side plate 7 on both sides.

The guide member 11 comprises an outer rail 13 formed in the shape of a C-shaped channel facing inward, and an inner rail 15 moving up and down in the outer rail 13. As shown in FIG. 2, the inner rail 15 has a flange portion 1 extending outward from a rail main portion 15a formed in a U-shaped cross section.
5b is bent, and a plurality of sliders 17 that slide and move in the outer rail 13 are mounted on the flange portion 15b.

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

The outside of the gear box 25 is the guide member 1.
1 on the outer rail 13 side and the base plate 1 on the bottom side
Each of the gearboxes 25 is fixed to one side and functions as a base-side strength member of the guide member 11, and a drive motor 29 capable of normal rotation and reverse rotation is mounted on the gear box 25 on the right side (in the drawing).

The bevel gear 29 in the gear box 25 to which the drive motor 29 is mounted is connected to the drive motor 29 via a reduction mechanism 31 comprising a worm and a worm wheel.
, The bevel gear 29 in the other gear box 25 is also supplied with the reduced rotational power from the drive motor 29 via the transmission shaft 33.

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

The control unit 35 has a function of converting AC into DC 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, box-shaped elevating members 37, 37 are screwed to the left and right screw rods 19, and the elevating member 37 is screwed to the rail main body 15a of the inner rail 15 via a mounting bracket 39. It is stopped 41. Thus, the elevating body 37 can be moved up and down by the forward or reverse rotation of the screw rod 19, and the highest 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 a second detection sensor S2 provided on the guide member 11 side, and detection signals from the first and second detection sensors S1 and S2 are transmitted to the control unit 35.
To be entered.

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

According to the lifting device 3 configured as described above, when, for example, the screw rod 19 is rotated forward by the driving motor 29, the lifting member 37, that is, the lifting plate 45 is raised. When the screw rod 19 is reversed, the elevating body 37, that is, the elevating plate 45 is lowered, and the elevating plate 45 can be moved up and down. When the elevating plate 45 is operated, the upper end of the screw rod 19 is supported at the upper and lower ends by the guide member 11 and the lower end is supported by the base plate 1 at the upper and lower ends. Vertical movement is obtained.

Further, since the entire 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. By bolting the side plate 7 of the base plate 1 to the frame 53 of the desk 49 through the mounting holes 9 while the bolt is fixed to the top plate 51, 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, it is excellent in assemblability, and the strength and rigidity of the entire device can be secured by the guide member. A stable up and down movement of the elevating body can be obtained.

Further, the use as an elevating device is not specified, and the device has versatility.

[Brief description of the drawings]

FIG. 1 is a schematic front view of the 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]

 DESCRIPTION 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 Elevating body

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-276798 (JP, A) JP-A-7-116033 (JP, A) JP-A 5-69078 (JP, U) JP-A 57- 7793 (JP, U) Japanese Utility Model 3-51798 (JP, U)

Claims (1)

(57) [Claims] 1. A left and right guide member comprising an outer rail erected on both sides of a base plate, an inner rail moving up and down in the outer rail, an upper end having a bracket through the guide member, and a lower end having a lower end. Left and right screw rods rotatably supported on the base plate side via a gear box, respectively, and erected along the guide member, and forward / reverse rotation for applying rotational power to the screw rods via the gear box. An elevating unit comprising a possible drive motor and a pair of left and right elevating bodies screwed to the respective screw rods and coupled to the inner rail.