JPH0674119B2 - Swing arm device for car lift - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a vehicle lift having four swing arms used for inspection and maintenance of an axle.

(Prior Art) In a vehicle lift of the type described above, a swing arm that is rotated and locked to a desired position is automatically released at the lower limit of the lift. Some of them are listed in −33178 Kosho.

In this type of vehicle, after raising the vehicle for inspection and repair, lower the lift, and at the lower limit, remove the four swing arms from the underside of the axle by hand and move outward. It is rotating.

The details of this work are as follows.

(A) Bend over, look under the vehicle body, remove the swing arm rotation locking device, and then rotate the arm outward to pull it out of the vehicle.

(B) When the swing arm rotates, if it interferes with the vehicle, the swing arm is contracted and then rotated.

(C) The operations (a) and (b) above are performed on all four swing arms while moving around the vehicle.

(D) Get in the vehicle and exit the work area.

(Problems to be Solved by the Invention) In a vehicle lift including the swing arm as described above, a work required after a descending operation, that is, a worker moves from a descending operation position to move around a vehicle, At each swing arm, the work of bending over to release the rotation locking device, then shortening the swing arm and rotating the swing arm outward is tedious and requires considerable labor and time. There is a problem.

(Embodiment) In the drawings, (1) is a carriage that can be appropriately moved up and down along each of a pair of left and right columns (2) and (2) (the other is not shown), the inner end of which is shown. The vertical shafts (4) and (4 ') fixed to the base ends of a pair of front and rear (left and right in FIGS. 1, 4, and 5) swing arms (3) and (3') are pivotally attached to the It is supported.

The swing arms (3) (3 ') are fixed to the fixed cylinders (3a) (3
a ') and telescopic cylinders (3b) (3b') are of a lens barrel type, and air cylinders (5) and (5 ') are provided in the fixed cylinders (3a) and (3a'), respectively. Moreover, the tips of the piston rods (6) (6 ') extending from the ends of the piston rods (6) (6') are received by the tips (7) (7 ') of the telescopic cylinders (3b) (3b'), respectively.
It is connected to the neighborhood.

Pinion (8) (8 ') is fixed to each vertical shaft (4) (4'), and each pinion (8) (8 ') is slidable on the carriage (1) in the front-back direction. It meshes with the racks (9) and (9 ') provided.

Each rack (9) (9 ') has a lock-up cylinder (10) facing the front and rear direction, which is arranged with its heads abutting against each other.
Piston rods (11) and (11 ') extending from (10') are connected to each other so that they can be moved back and forth.

The air cylinders (5) (5 ') and lock-up cylinders (10) (10') on the same side are connected to a compressed air source via sliding mechanical valve (12) (12 '), respectively. There is. The operation of the valves (12) and (12 ') will be described later.

(13) and (13 ') are swivel shoins for supplying compressed air to the air cylinders (5) and (5'), and (14) is a mechanical valve (12 ') and a lockup cylinder (10).
It is a throttle valve provided between (10 ').

As shown in Fig. 3, one mechanical valve (12)
With the operating rod (15) facing down, the carriage (1)
Is attached to the inner end of the central part of.

Immediately below the operating rod (15), a push rod (16) having a stop flange (16a) at its upper end is vertically movably fitted to the bottom plate (1a) of the carriage (1), and the push rod (16) is The coil spring (17) contracted between the stop flange (16a) and the main body of the mechanical valve (12) urges it downward.

Thus, the operating rod (15) is pushed by the pushing rod (16) which is in contact with the support base plate (18) until the carriage (1) rises slightly, and keeps the mechanical valve (12) in the operating state. ing.

As shown in FIG. 2, the other mechanical valve (12 ') is attached to the lower part of the side surface of the carriage (1), and a dog (19) facing vertically is provided at a corresponding position of the support base plate (18). Is erected, the carriage (1) is lifted, and the mechanical valve (12 ') is deactivated.
Further, until the carriage (1) is slightly raised, the operating rod (20) is in contact with the dog (19), and the mechanical valve (12 ') is in an operating state.

Next, the operation will be described.

Carriage lowering After the inspection and repair work for both vehicles is completed, operate the lowering lever (not shown) to lower the lift. At this time, both mechanical valves (12) and (12 ') are in a non-operating state.

When the carriage (1) approaches the lower limit, one mechanical valve (12 ') is brought into contact with a dog (19) in the vertical direction attached to the support base plate (18) to be operated (Fig. 2). ), Both lock-up cylinders (10) (10 ')
Release the locked state of.

When the carriage (1) further descends and reaches the lower limit, as shown in FIG. 3, the operating rod (15) of the mechanical valve (12) comes into contact with the support base plate (18), and the mechanical valve (12). ) Is also activated and the descent is stopped. At this time, stop operating the lowering lever.

A large amount of compressed air introduced from the mechanical valve (12 ') flows to the tips of the air cylinders (5) (5'), and the swing arms (3) (3 ') are shortened.

At the same time, the piston rods (11) (11 ') of the lockup cylinders (10) (10') are retracted by the air pressure slightly pressed by the throttle valve (14), and the racks (9) (9 '). ) And the pinion (8 '), both swing arms (3) and (3') are rotated outward.

Thus, in the lower limit of the carriage (1), the swing arms (3) and (3 ') are automatically moved to the outside of both vehicles, and both vehicles can be exited from the lift area.

Setting of both vehicles With the swing arms (3) and (3 ') open as shown in Fig. 5, both vehicles are put in between a pair of columns (2) and (2) and stopped at a fixed position.

By operating the raising lever (not shown), the carriage (1) is slightly raised (about 3 to 10 mm). At this time, the mechanical valve (12) remains in the operating state, and the mechanical valve (12 ') returns to the non-operating state.

Since the pressure in both air cylinders (5) (5 ') and lock-up cylinders (11) (11') is released, both swing arms (3) (3 ') can be freely expanded and contracted or rotated. You can

Put a total of four swing arms (3) and (3 ') on the left and right below both vehicles, and set the respective receiving moneys (7) and (7') to the required positions.

Operate the lift lever to lift the carriage (1) together with both vehicles.

Carriage (1) has a certain limit (for example, 50 to 10)
(0 mm), the mechanical valve (12) moves to the dog (1
9) It comes off and returns, and the lock-up cylinder (10) (1
0 ') is locked.

(Effects of the Invention) (1) When the carriage is lowered, the swing arm automatically contracts at the lower limit and pivots outward, so that (a) work efficiency is improved, and (b) worker Since it is enough to bend over only when setting up the receiving money, it is possible to stand up at other times, so fatigue is greatly reduced.

(2) Since electric wiring such as a limit switch is unnecessary, (a) configuration and assembly are simplified, and (b) there is no risk of electric shock.

(3) Since the swing arm contracts before turning, it does not interfere with the wheels of both vehicles.

(4) Since each cylinder is mounted in the swing arm and the carriage, it does not hinder the work and is not damaged.

(5) Since it is not necessary to provide a protrusion on the upper surface of the carriage, the doors of both vehicles do not come into contact with each other when opening and closing.

(6) When setting the receiving money, conventionally, the swing arm is unlocked with one hand (locks when the hand is released), and at the same time, the swing arm is extended and contracted with the other hand. The troublesome work had to be done under the wheel, but in the present invention, it is simple because the work with only one hand is required.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of an embodiment of the present invention as seen from the inside, FIG. 2 is a vertical sectional front view of the same part, and FIG. 3 is an enlarged view of the essential part in FIG. 4 and 5 are plan views schematically showing a compressed air circuit and related parts when the swing arm is in a free state, and FIG. 5 is a state in which the swing arm is also rotated outward. (1) Carriage, (1a) Bottom plate (2) Strut, (3) (3 ') Swing arm (3a) (3a') Fixed tube, (3b) (3b ') Telescopic tube (4) (4') Vertical Shaft, (5) (5 ') Air cylinder (6) (6') Piston rod (7) (7 ') Receiving, (8) (8') Pinion (9) (9 ') Rack (10) ( 10 ') Lock-up cylinder (11) (11') Piston rod (12) (12 ') Mechanical valve (13) (13') Swivel joint (14) Throttle valve (15) Actuating rod (16) Push rod, (16a) Stop flange (17) Coil spring, (18) Strut base plate (19) Dog, (20) Actuating rod

Claims (4)

[Claims] 1. A base end of a pair of front and rear swing arms of a lens barrel type, which is telescopically fitted to left and right carriages that move up and down along a column, is provided so as to be rotatable about a vertical axis,
In a vehicle lift in which the lower surface of the vehicle is supported at four points by the receiving money provided at the tip of each swing arm, the swing arm is linked to the telescopic air cylinder and the lockup cylinder for rotation to descend. When the carriage reaches near its lower limit, the mechanical valve operates to operate the air cylinder to shorten the swing arm and free the lockup cylinder.When the carriage further descends, the mechanical valve locks the lock. A swing arm device in a lift for an automobile, characterized in that an up cylinder is operated to rotate a swing arm outward. 2. A swing arm device for a vehicle lift according to claim 1, wherein the telescopic air cylinder is provided in the swing arm and the lockup cylinder is provided in the carriage. 3. A lockup cylinder is provided with two lockup cylinders, and the racks driven by the piston rods of the lockup cylinders are engaged with the racks fixed to the bases of the swingarms to rotate the swingarms with the lockup cylinders. A swing arm device for a vehicle lift according to claim (1) or (2), wherein the swing arm device is configured to move. 4. A vehicle according to claim 3, wherein two lock-up cylinders are connected to a compressed air source with two mechanical valves, and one mechanical valve is exclusively used for unlocking. Swing arm device for a lift.