JPH04272096A - Automatic lift - Google Patents

Abstract

PURPOSE:To substantially improve workability by providing a pair of racks horizontally movably between both gears and a screw shaft vertically movably in a central location between both the gears in a base end part of each swing arm, and constituting a turn lock device of the swing arm by connecting the screw shaft to each rack. CONSTITUTION:Gears 21, horizontally turned integrally with swing arms 15, are integrally provided in a base end part of each swing arm 15, and a pair of racks 22, which can be engaged/disengaged with/from each gear 21, are provided between both the gears 21 horizontally movably in a diametric direction of the gear 21 relating to a supporter 13. A screw shaft 24, rotated by a handle 28, is provided in almost a central location between both the gears 21 movably in a vertical direction relating to the supporter 13, and a turn lock device 20 of both the swing arms 15 is constituted by connecting this screw shaft 24 to each rack 22 respectively through a link 23.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an autolift for raising and lowering automobiles during inspection and maintenance of automobiles.

0002

[Prior Art] As one type of autolift, there is a pair of left and right supports that are moved up and down by a lifting drive device, and a pair of front and rear swing arms that are pivotally supported at the base end of each of these supports so that they can rotate horizontally. For example, there are
This is shown in Japanese Utility Model Publication No. 1-9835.

0003

This type of autolift is usually provided with a rotation locking device that locks the rotation of the four swing arms. However, the conventional swing lock device locks the swing by simply screwing a threaded rod into the handle (screw-in type), and is provided separately on each swing arm. Therefore, in order to lock the rotation of all the swing arms in the autolift, it is necessary to operate all four rotation lock devices, which not only has poor work efficiency but also makes it easy to forget to operate it. The present invention has been made to address the above-mentioned problems, and an object of the present invention is to provide an autolift with good workability that can simultaneously lock a pair of front and rear swing arms assembled to each support.

0004

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a pair of left and right supports that are moved up and down by a lifting drive device, and a horizontal rotation at the base end of each of these supports. In an autolift equipped with a pair of front and rear swing arms that are pivotably supported, a gear that horizontally pivots integrally with the swing arm is provided at the base end of each of the swing arms, and these gears A pair of racks capable of being engaged with and disengaged from each gear are provided between the racks so as to be horizontally movable in the radial direction of the gears with respect to the support body, and a screw rotated by a handle is provided approximately at the center between the two gears. A shaft was provided to be movable in the vertical direction with respect to the support body, and the screw shaft and each of the racks were connected via links to constitute a swing locking device for both the swing arms.

[0005]

According to the present invention, when the handle is operated to move the screw shaft vertically relative to the support, both racks are horizontally moved in the radial direction of the gear via both links. Therefore, by operating the handle, you can move both racks closer to each other and disengage them from both gears at the same time, or move both racks away from each other and engage both gears at the same time. At the same time, it can be set to a free state or a locked state. therefore,
In this autolift, the rotation of all four swing arms can be locked or freed by simply operating the handles provided on the left and right pairs of supports twice, greatly improving work efficiency. In addition, it is possible to reduce the possibility of forgetting to perform an operation.

Furthermore, in the present invention, if both gears, both racks, both links, etc. are arranged in a straight line in the horizontal direction when the swing arm is in the rotationally locked state,
Even if a turning force acts on each swing arm, the same turning force is received by acting from each gear on the screw shaft orthogonally to its axis through each rack and each link. Since the screw shaft is not moved in the axial direction by force, the engagement between each gear and the rack is not released, and a firm lock state can be maintained.

[0007]

[Embodiment] Fig. 1 shows a buried type autolift in which the present invention is implemented. Each support body 13 is attached to the outer side of the substantially central portion of the support plate 12 . Each support 1
3 is swingably attached to each support plate 12 by a horizontal support shaft 14 along the longitudinal direction of each support plate 12, as shown in FIGS. It supports the swing arm 15.

Each swing arm 15 has a pin 1 at its base end.
6, a pivot arm 15a is pivotally supported on the support body 13 so as to be horizontally pivotable in the range shown by the dashed line in FIG. It is composed of an arm 15b and a vehicle body holder 15c assembled to the tip of the telescoping arm 15b,
A screw-in slide lock device 17 that locks the sliding movement of the telescoping arm 15b by engagement with the swing arm 15a is attached to the base end of the telescoping arm 15b, and a slide lock device 17 is attached to the base end of the swing arm 15a. A swing locking device 20 according to the present invention is installed which locks the swing of the swing arm 15a. Note that the rotation range of each swing arm 15 is as follows:
One end thereof is defined by a stopper bolt 18 shown in FIG. 2, and the other end is defined by a support member 13.
and the chain attached between the swing arm 15a (not shown)
It is now defined by.

The swing locking device 20 is for simultaneously locking a pair of front and rear swing arms 15 assembled to each support 13, and as shown in FIGS. 2, 3, and 4,
A pair of gears 21, a pair of racks 22, a pair of links 23
and a screw shaft 24. Each gear 21
is formed in a semicircular shape, and is screwed and fixed to the lower surface of the base end of each swing arm 15a.
Each tooth portion 21a faces each other within the rotation range of 5a.

Each rack 22 is connected in the front-rear direction by a pair of rack guides 25a (see FIG. 4) integrally formed at both ends of a guide plate 25 screwed to the lower surface of the support 13 between both gears 21. (in the vertical direction of the figure), that is, each gear 21 is assembled so as to be horizontally movable in the radial direction, and the tooth portion 22a
It is removably engaged with the tooth portion 21a of each gear 21 at. Note that the tooth portion 22a of each rack and the tooth portion 21 of each gear 21
Since the module a is made small and the fixed angle pitch is small, it can be fixed at almost any position within the swing range of each swing arm 15a.

Each link 23 is tiltably connected to the rack 22 through a pin P1 at one end, and connected to the screw shaft 24 through a pin P2 at the other end, and is connected to the screw shaft 24 in the vertical direction (axial direction). direction) is converted into horizontal movement of the rack 22 and transmitted. The screw shaft 24 is formed in a stepped shape, and has a large lead screw 24a formed in its large diameter portion, and a nut 26 is screwed onto this screw 24a.

The nut 26 is prevented from coming off by a stopper 27 screwed to the upper end of the screw shaft 24.
A handle 28 is screwed and fixed to the annular flange 26a. In addition, in this embodiment, the screw shaft 24
A compression coil spring S is assembled between the retainer 29 assembled to the step part of the inner hole of the support body 13, and the rack 22, link 23, screw shaft 24, etc. are in the locked state as shown in FIGS. 3 and 4. It is designed to be held elastically. In this locked state, both gears 21, both racks 22, both links 23, etc. are arranged in a straight line in the horizontal direction as shown in the figure.

In this embodiment configured as described above, if the handle 28 is rotated to rotate the nut 26 and the screw shaft 24 is moved vertically with respect to the support 13, the screw shaft 24 is moved vertically with respect to the support 13. Both racks 22 are horizontally moved in the radial direction of both gears 21. Therefore, by rotating the handle 28, both racks 22 can be moved closer to each other and disengaged from both gears 21 at the same time (see FIG. 5), or both racks
2 away from each other and engage both gears 21 at the same time (
(see FIG. 3), and both swing arms 15a can be set in a free state or locked state at the same time.

Therefore, in the autolift, the handles 28 provided on the left and right supports 13 are
It is possible to lock or free the rotation of all four swing arms 15 by operating only twice, thereby greatly improving work efficiency and reducing the possibility of forgetting to operate. Can be done. In addition, in this embodiment, since a large lead screw is adopted as the screw 24a of the screw shaft 24, the screw shaft 24 can be moved largely in the axial direction with a small rotation angle of the handle 28. Workability can be improved.

Furthermore, in this embodiment, when the swing arm 15 is in the rotationally locked state, both gears 21 and both racks 22 are
Since both links 23 and the like are arranged in a straight line in the horizontal direction, even if a turning force acts on each swing arm 15, the turning force is transmitted from each gear 21 through each rack 22 and each link 23. Since the screw shaft 24 is received by acting perpendicularly to its axis, the screw shaft 24 is not moved in the axial direction by the same turning force, and the engagement between each gear 21 and the rack 22 is prevented. It is never released and can maintain a strong locked state.

Furthermore, in this embodiment, the retainer 29
Since the rack 22, link 23, screw shaft 24, etc. are elastically held in the locked state shown in FIGS. 3 and 4 by the compression coil spring S, the swing arm 15 is accurately held in the locked state. . Therefore, since the retainer 29 and the compression coil spring S have the function of urging the rack 22, link 23, screw shaft 24, etc. toward the locking position shown in FIGS. 3 and 4, the spring force of the spring S,
Lead of screw 24a on screw shaft 24 and handle 2
By appropriately setting the frictional engagement between the swing arm 8 and the support 13, when the swing arm 15 is changed from a free rotation state to a locked state, the handle 28 is first rotated slightly or the handle 28 is removed. Just rack 2
2. The link 23, screw shaft 24, etc. may be automatically moved to the locked state. In addition, handle 2
As a means for reducing the frictional engagement between the support body 8 and the support body 13, there is a means of interposing a thrust bearing at the same location.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of an autolift according to the present invention.

FIG. 2 is an enlarged plan view of the main part of FIG. 1.

FIG. 3 is a vertical sectional side view of the main part of FIG. 2.

FIG. 4 is a bottom view of the main parts of FIG. 2.

FIG. 5 is an explanatory diagram of the operation of the main parts.

[Explanation of symbols] 13...Support body, 15...Swing arm, 20...Swivel locking device, 21...Gear, 22...Rack, 23...Link, 2
4...Screw shaft, 28...Handle.

Claims (1)

[Claims] Claim 1: An autolift comprising a pair of left and right supports that are moved up and down by an elevator drive device, and a pair of front and rear swing arms that are pivotally supported at their base ends to be horizontally rotatable on each of these supports. A gear that horizontally rotates integrally with the swing arm is integrally provided at the base end of each of the swing arms, and a pair of racks that can be engaged with and disengaged from each gear are supported between the two gears. The gear is provided so as to be horizontally movable in the radial direction of the gear with respect to the support body, and a screw shaft rotated by a handle is provided approximately in the center between the two gears so as to be movable in the vertical direction with respect to the support body. An autolift characterized in that a shaft and each of the racks are connected via links to constitute a swing locking device for both the swing arms.