JPH0642065Y2 - Turntable lifting device for parking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a turntable built-in type parking device, and a turntable for a parking device having an improved lifting jack for raising and lowering a traveling frame on which the turntable is mounted. The present invention relates to a lifting device.

[Prior Art] As shown in FIG. 3, in a turntable built-in parking apparatus 2, a pallet 4 detachably engaged with a cage 3 is provided.
The pallet 4 is separated from the cage 3 by raising the traveling frame 6 with the traveling wheels 8 on which the turntable 1 is mounted. Can be changed, the traveling frame 6 travels on the traveling rail 7 in the pit 11,
The hydraulic cylinders 10, which are adapted to be conveyed to the adjacent parking device 2 and which raise and lower the traveling frame 6, are arranged at the four corners of the base frame 9.

[Problems to be Solved by the Invention] The traveling frame 6 is moved up and down by a hydraulic cylinder 10, but the hydraulic cylinder 10 has a large stroke, which makes the lift unstable and requires an oil tank. Cannot lower the traveling frame 6, and in order to lower the heights of the turntable 1 and the traveling frame 6, only the portion of the traveling frame 6 mounted on the hydraulic cylinder 10 is raised and the other portions are The height of the entire device had to be reduced by making the structure of an inner dent to be lowered or by digging the pit 11 deeply.

Therefore, recently, instead of the hydraulic cylinder 10, a screw type lifting jack 12 as shown in FIG. 4 is adopted, or when the pallet 4 on which the vehicle 5 is mounted is tilted in the jack 12, a biased load on the jack piston 13 is applied. Therefore, there is a risk that the load is directly transmitted to the central screw rod 14 as a bending force and the screw of the screw rod 14 is broken. Further, the contact surface of the arm 15 of the jack piston 13 supporting the traveling frame 6 with the traveling frame 6 needs to be machined with high dimensional accuracy and must be strictly controlled.

The present invention solves the above-mentioned conventional drawbacks, and an object thereof is to provide an elevating device which does not require a large moment due to time-consuming machining and uneven load on the central screw rod 14.

[Means for Solving the Problem] The present invention relates to a turntable lifting device for lifting a traveling frame mounted with a turntable provided in a turntable built-in parking device. And a flanged nut that is screwed into the beaver screw and can be raised and lowered by rotation of the beaver screw, and a traveling frame can be raised and lowered by loosely fitting on the flanged nut and moving up and down together. A parking device comprising: a jack arm having a crown on a contact surface with a nut and a guide tube having a guide groove for restraining rotation of the flanged nut and the jack arm and guiding up and down. It relates to the turntable lifting device in the above.

[Operation] The jack arm on which the traveling frame is mounted is loosely fitted to the flanged nut, and the contact surface between the jack arm and the flanged nut has a crown, so that they are in line contact with each other. The moment due to the applied eccentric load is not transmitted to the nut or beaver screw.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show an embodiment of the present invention, and the third embodiment
Portions denoted by the same reference numerals as in FIG. 4 and FIG. 4 represent the same items.

As shown in FIG. 1, in an elevator jack that supports a traveling frame 6 on which the turntable 1 is mounted in a parking apparatus 2 with a built-in turntable 1 and that raises and lowers the traveling frame 6, A beaver screw 16 is erected on the central shaft, the top portion of which is not fixed and the beaver screw 16 can be freely rotationally driven.

A sprocket 18 rotatable by a rotary drive (not shown) via a self-aligning roller bearing 17 is provided at the bottom of the jack, and the beaver screw 16 is rotated by the sprocket 18.

The flanged nut 20 screwed to the beaver screw 16 is
An arm support washer 26 having a nylon guide ring 25 and a striker 19 is fitted to the outside of the nut portion 21, and the bolt is
Both of them are fixed to the flange portion 22 by 27 and integrally formed, and the striker 19 is projected symmetrically.

Further, on the upper part of the nut portion 21 of the flanged nut 20,
The jack arm 28 that moves up and down together with the flanged nut 20 and is loaded with the traveling frame 6 is loosely fitted.

Vertical guide grooves 24 are provided on the left and right sides of the guide cylinder 23 of the lifting jack symmetrically with respect to the center of the guide cylinder 23, and the striker 19 and the left and right protrusions of the jack arm 28 are inserted into the guide grooves 24.

Further, a non-slip rubber portion 29 is provided on a flat end portion of the left and right protruding portions of the jack arm 28, and a convex traveling frame member 30 is placed on the non-slip rubber portion 29, and the convex portion of the member 30 is a traveling portion. The member 30 is fitted in a hole 31 formed at the end of the frame 6
The traveling frame 6 is fixedly mounted by.

The contact surface between the jack arm 28 and the flanged nut 20 is provided with a crown on the surface of the jack arm 28 so that they do not come into flat contact with each other.

Also, to prevent foreign matter from entering the lifting jack,
A dustproof bellows 32 is provided, and an upper lid 33 is provided at the tip of the bellows 32 to shut off the outside from the inside of the lifting jack.

In the above configuration, when the jack is moved up and down, when the beaver screw 16 rotates, the nut with flange 20
The rotation is restricted by the striker 19, is guided by the guide groove to move up and down, and the rotation of the jack arm 28 loosely fitted on the upper portion of the flanged nut 20 is also restricted by the protrusion.
The flanged nut 20 raises and lowers the traveling frame 6 mounted on the non-slip rubber portion 29 of the protruding portion.

In this case, only the nut with flange 20 is screwed into the screw of the beaver screw 16, the jack arm 28 on which the traveling frame 6 is mounted is separated from the nut with flange 20, and the jack arm 28 and the nut with flange are mounted. Since the jack arm 28 is provided with a crown on the contact surface with the arm support washer 26 forming a part of the contact surface 20 and the contact surface is not the surface contact but the line contact, the tilt of the traveling frame 6 causes the jack arm 28 to move.
Even if a biased load is applied to the flanged nut 20, the flanged nut 20 and the beaver screw 16 do not apply a large moment due to the biased load, and smooth lifting and lowering is possible.

Also, a slight biased load can be absorbed by the self-aligning roller bearing 17.

Therefore, precise processing of the arm 28 surface is not necessary.

The turntable lifting device in the parking device of the present invention is not limited to the above-described embodiment, and the beaver screw forming the central axis of the lifting jack is rotatably fixed by the bearing. Of course, various changes can be made without departing from the scope of the invention.

[Effects of the Invention] As described above, according to the turntable lifting device in the parking device of the present invention, the jack arm on which the traveling frame is mounted and the flanged nut that is lifted by the beaver screw are separately separated, and the jack. Since the arm is equipped with a crown, a large moment due to the biased load that the jack arm receives due to the tilt of the traveling frame is not transmitted to the flanged nut, so there is no damage to the beaver screw thread and a smooth jack arm Can be raised and lowered.

Therefore, it is possible to obtain an excellent effect that it is not necessary to perform precise processing on the jack arm.

[Brief description of drawings]

1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a plan view of the present invention, FIG. 3 is a side sectional view of a conventional parking device, and FIG. 4 is a schematic view of a conventional lifting jack. is there. 1 is a turntable, 2 is a parking device, 6 is a running frame, 16 is a beaver screw, 20 is a flanged nut, 22 is a flanged nut flange, 23 is a guide cylinder, 24 is a guide groove of the guide cylinder, and 28 is a jack. An arm, 30 shows an arm of a jack arm.

Claims (1)

[Scope of utility model registration request] 1. A turntable elevating device for elevating a traveling frame on which a turntable mounted on a turntable built-in parking device is lifted, and a beaver screw erected so as to be rotatable, and the beaver screw and the screw. The flanged nut that can be raised and lowered by the rotation of the mating beaver screw, and the traveling frame can be raised and lowered by loosely fitting the upper part of the flanged nut and moving up and down, and at the contact surface with the flanged nut. A turntable lifting device for a parking device, comprising: a jack arm having a crown; and a guide tube having a guide groove for restraining the rotation of the flanged nut and the jack arm and guiding the lifting and lowering.