JP2885525B2 - Auto lift - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic lift for raising and lowering a vehicle during inspection and maintenance of the vehicle.

[0002]

2. Description of the Related Art As one type of an automatic lift, a pair of left and right supports which are moved up and down by a lifting drive device, and a pair of front and rear swing arms which are supported by these support members at their base ends so as to be horizontally pivotable. Some are provided with, for example,
This is disclosed in Japanese Utility Model Publication No. 1-9835.

[0003]

In such an automatic lift, a swing lock device for locking the swing of four swing arms is usually provided. The conventional turning lock device locks the turning by simply screwing a screw rod with a handle (screw-in type), and is provided separately for each swing arm. For this reason, in order to lock the swing of all the swing arms in the automatic lift, it is necessary to operate all the four swing lock devices, and not only the workability is poor, but also the operation forgetting is likely to occur. SUMMARY OF THE INVENTION The present invention has been made to address the above-described problem, and has as its object to provide an automatic lift that can simultaneously lock a pair of front and rear swing arms attached to each support and has good workability.

[0004]

In order to achieve the above object, according to the present invention, a pair of left and right supports which are moved up and down by a lifting drive device, and each of the supports is horizontally pivoted at a base end portion. In an automatic lift comprising a pair of front and rear swing arms that are pivotally supported, gears that horizontally turn integrally with the respective swing arms are integrally provided at a base end of each of the swing arms. It provided to be horizontally moved in the radial direction of the gear pair of racks that can engage disengaged with respect to said support relative to the gears between, also the support of the sleep Flip-axis at a substantially central portion between the two gears movable vertically relative to the body, each of said rack and the screw shaft and respectively connected via a link, constitutes a rotation lock device of the two swing arms, the rotation lock instrumentation
Of the pair of racks in the radial direction of the screw shaft.
To the lower surface of the support with the two gears.
And the screw shaft is rotated on the upper surface side of the support.
The screw shaft can be moved vertically with respect to the support.
Screw.

[0005]

In the present invention the action and effects of the present invention, the handle times
If the screw shaft is moved in the vertical direction with respect to the support by rotating, both racks move horizontally in the radial direction of the gear via both links. Therefore, by rotating the handle, both racks can be brought closer to each other to disengage with both gears at the same time, or both racks can be moved away from each other and engaged with both gears at the same time. Can be simultaneously set in a free state or a locked state. Therefore, in the auto-lift, the turning of all four swing arms can be locked or made free only by operating the handles provided on the pair of left and right supports twice, thereby greatly improving workability. And the possibility of forgetting the operation can be reduced. In the present invention, the swing arm
Gears, both racks, both links, etc. in the swivel lock state
Is set to be arranged in a straight line in the horizontal direction,
Even if a swing force acts on each swing arm, the swing force
From the gear to each screw shaft via each rack and each link
Acts perpendicular to the line and is received
The force does not move the screw shaft in the axial direction.
The gear is not disengaged from the rack, and
Lock state can be maintained.

According to the present invention, a turning lock device is provided.
Is operated by turning the handle.
Handle in addition to the top side of the support, and a pair of
Gear and both gears are distributed separately on the lower side of the support.
So that the overhang from the support is small.
That protrude upwards
Interference with the door of a car lifted and lowered
Take special measures to reduce interference and avoid interference
No need to install the swivel lock device easily
Can be. In addition, the screw shaft is provided at the approximate center between both gears
And a pair of racks are arranged facing each other in the radial direction of the screw shaft.
Therefore, the length of each rack and each link can be shortened.
Therefore, the turning lock device can be made compact.

[0007]

FIG. 1 shows a buried type autolift embodying the present invention. The autolift has a pair of left and right support plates 12 which are moved up and down by a pair of right and left elevating plungers 11, respectively. Each support 13 is attached to a substantially central portion of the support plate 12 outside. Each support 1
1 and 2, as shown in FIGS. 1 and 2, each of the support plates 12 is swingably attached to each support plate 12 by a horizontal support shaft 14 along the longitudinal direction of the support plate 12. The swing arm 15 is supported.

Each swing arm 15 has a pin 1 at its base end.
A pivot arm 15a is pivotally supported on the support 13 via the support member 6 so as to be horizontally pivotable in a range indicated by a dashed line in FIG. An arm 15b and a vehicle body receiver 15c attached to a tip of the telescopic arm 15b,
At the base end of the telescopic arm 15b, a screw-in type slide lock device 17 for locking the sliding of the telescopic arm 15b by engagement with the turning arm 15a is assembled, and at the base end of the turning arm 15a. A turning lock device 20 according to the present invention for locking the turning of the turning arm 15a is assembled. The swing range of each swing arm 15 is
One end is defined by a stopper bolt 18 shown in FIG.
(Not shown) attached between the arm and the turning arm 15a
As defined by

The turning lock device 20 locks a pair of front and rear swing arms 15 attached to each support 13 at the same time. As shown in FIGS. 2, 3 and 4,
A pair of gears 21, a pair of racks 22, and a pair of links 23
And a screw shaft 24 and the like. Each gear 21
Is formed in a semicircular shape, and is provided on the lower surface side of the support 13.
Are screwed to the base end lower surface of each pivot arm 15a Te, each tooth 21a is adapted to face each other in the pivoting range of the pivot arm 15a.

Each rack 22 is moved 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 and fixed to the lower surface of the support 13 between the two gears 21. (Vertical direction in the figure), ie, each gear 21
Is mounted so that it can move horizontally in the radial direction of the screw shaft 2
4 are arranged so as to face each other in the radial direction of the
At a, the gear 21 is detachably engaged with the teeth 21a of each gear 21. The teeth 22a of each rack and the teeth 2 of each gear 21
Since the module 1a is made smaller and the fixed angle pitch is made smaller, it can be fixed at almost any position within the turning range of each turning arm 15a.

Each link 23 has one end connected to the rack 22 via a pin P1 so as to be tiltable and the other end connected to a screw shaft 24 via a pin P2. ) Is converted to the movement of the rack 22 in the horizontal direction and transmitted. Screw shaft 24
Is formed in a stepped shape, and substantially at the center between the respective gears 22.
Penetrates the support 13 in the vertical direction at the site, the large-diameter portion is threaded 24a of the large leads formed, a nut 26 is screwed into the screw 24a.

The nut 26 is secured by a stopper 27 fixed to the upper end of the screw shaft 24 by screwing.
A handle 28 is screwed and fixed to the annular flange 26a. In the present embodiment, the screw shaft 24
The compression coil spring S is mounted between the retainer 29 mounted on the stepped portion and the inner hole stepped portion of the support 13, and the rack 22, the link 23, the screw shaft 24, etc. are locked in FIGS. To be held resiliently. In this locked state, both gears 21, both racks 22, both links 23, and the like are arranged in a straight line in the horizontal direction as shown in the figure.

In this embodiment constructed as described above, if the handle 28 is rotated to rotate the nut 26 to move the screw shaft 24 in the up-down direction with respect to the support 13, Thus, both racks 22 move horizontally in the radial direction of both gears 21. For this reason, by rotating the handle 28, the racks 22 are brought closer to each other,
Can be released simultaneously (see FIG. 5), and both racks 22 can be moved away from each other and engaged simultaneously with both gears 21 (see FIG. 3), so that both swing arms 15a are simultaneously in the free state. Or a locked state.

Therefore, in the automatic lift, the handles 2 provided on the pair of right and left supports 13 are provided.
By operating the 8 twice, all four swing arms 15
Can be locked or free to turn, greatly improving workability,
The possibility of forgetting the operation can be reduced. In this embodiment, since a screw having a large lead is used as the screw 24a of the screw shaft 24, the screw shaft 24 can be largely moved in the axial direction at a small rotation angle of the handle 28. Workability can be improved.

In this embodiment, both gears 21 and both racks 22
And the two links 23 and the like are arranged in a straight line in the horizontal direction. Therefore, even if a turning force acts on each swing arm 15, the turning force is transmitted from each gear 21 via each rack 22 and each link 23. Since the screw shaft 24 is acted on the screw shaft 24 at right angles to the axis thereof and is received, 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 performed. It is not released, and a strong lock state can be maintained.

In this embodiment, the retainer 29
The rack 22, the link 23, the screw shaft 24, and the like are resiliently held in the locked state of FIGS. 3 and 4 by the compression coil spring S and the swing locked state of the swing arm 15 is accurately held. . Since the retainer 29 and the compression coil spring S have a function of urging the rack 22, the link 23, the screw shaft 24, and the like toward the lock 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
When the swing arm 15 is changed from the free rotation state to the locked state, the handle 28 is first slightly rotated or the hand is released from the handle 28 by appropriately setting the frictional engagement between the handle 8 and the support 13. Just rack 2
2, the link 23, the screw shaft 24 and the like can be automatically moved to the locked state. In addition, handle 2
As means for reducing the frictional engagement between the support 8 and the support 13, there is a means for interposing a thrust bearing at the same position.

[Brief description of the drawings]

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

FIG. 2 is an enlarged plan view of a main part of FIG.

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

FIG. 4 is a bottom view of a main part of FIG. 2;

FIG. 5 is an operation explanatory view of a main part.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 13 ... Support body, 15 ... Swing arm, 20 ... Slewing lock device, 21 ... Gear, 22 ... Rack, 23 ... Link, 2
4 ... screw shaft, 28 ... handle.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B66F 7/28 B66F 17/00

Claims (1)

(57) [Claims] 1. An auto-lift comprising a pair of left and right supports which are moved up and down by a lifting drive device, and a pair of front and rear swing arms which are rotatably supported at their base ends so as to be able to turn horizontally. , A gear that horizontally turns integrally with the swing arm is integrally provided at a base end of each of the swing arms, and a pair of racks that can be engaged with and disengaged from each of the gears is provided between the two gears. provided to be horizontally movable in the radial direction of the gear to the body, also provided said sleep Flip-axis at a substantially central portion between the gears to be movable in the vertical direction relative to the support, wherein the screw shaft each the rack was connected via respective link, it constitutes a rotation lock device of the two swing arms, front in the swivel locking device
The pair of racks are arranged opposite to each other in the radial direction of the screw shaft, and
It is arranged on the lower surface side of the support together with the two gears, and
The screw shaft is rotated on the support upper surface side of the screw shaft.
A handle that can move up and down with respect to the support
An automatic lift that is screwed together .