JP2000119000A - Drop preventing safety device for vehicle lift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a drop preventing safety device over a long period by suspending a rod-like rack body provided with multiple notch sections in a buried case along a lift body, and providing a safety pawl lockable on a notch section of the rack body at the lower section of the outer periphery of the lift body. SOLUTION: When a lift body 4 is lifted for the maintenance work, no rack is provided on the peripheral face of the lift body 4 protruded on a floor surface, thus the lift body 4 can be used over a long period via complete lubrication by the scraper seal 5c of a cylinder guide 5b. A worker can safely conduct the work without hooking the working clothes on the lift body 4. Even when oil or mud is dropped on a floor surface, it is not infiltrated into the lift body 4. because a buried case 3 is sealed by a support apex 5a. A lifting means, a tuning device and a drop preventing safety device 12 are protected and can be used over a long period without being inspected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for preventing a vehicle lift from falling when used for inspection and maintenance of a vehicle such as an automobile.

[0002]

2. Description of the Related Art Conventionally, as a fall prevention safety device for a vehicle lift, there has been known a device comprising a rack provided on an outer periphery of an elevating body which moves up and down, and a safety claw provided on a support fixing portion and engaged with and disengaged from the rack. Have been.

[0003]

According to this conventional fall prevention safety device, the rack is provided on the outer periphery of the lifting / lowering body, and the rack is exposed above the support fixing portion as the lifting / lowering body rises. The scraper seal of the lubricating grease provided in the fixed portion and slidingly contacting the outer periphery of the elevating body in a ring shape is interrupted at the location of the rack, so that water or dust flows into the support fixed portion without sufficient sealing. There is a problem that the function of the lifting drive device and the fall prevention device in the support fixing portion is deteriorated.

[0004] It is an object of the present invention to solve these problems and to provide a safety device for preventing a vehicle lift from falling down which can withstand long-term use.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a lift control system in which an elevating body having a vehicle support at its upper end is mounted on a floor surface, in a buried housing extending downward from the floor surface. In a vehicle lift that is provided so as to be capable of hanging a bar-shaped rack body having a plurality of notches in the buried housing along the elevating body and locking the notch in the rack body. Is provided in a lower part of the outer periphery of the elevating body.

[0006]

FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIGS.

FIG. 1 is a sectional view of a twin lift device 1 for a vehicle according to a first embodiment, which is buried in a floor of a vehicle maintenance shop or the like, and FIG. 2 is a plan view of a closed lid portion on the floor. .

The lift of the vehicle twin lift device 1 is 1
Each lift 2 is composed of a lift 4 in a buried housing 3, a support 5 for supporting the lift 4, and a hydraulic cylinder 6 a as lifting means 6. An upper end of a rod 6c of the hydraulic cylinder 6a is connected to an upper surface of the lifting / lowering body 4 in a cylinder, and an upper opening 3c of the buried housing 3 is connected to the support 5 by an upper surface of a bottom 3b of the body 3. Are sealed with a lid 5a provided continuously.

The buried housing 3 has a rectangular or cylindrical tubular portion 3a, the bottom portion 3b sealed to the lower end of the tubular portion 3a by welding or the like, and an opening at the upper end of the tubular portion 3a. The hydraulic cylinder 6a is composed of a portion 3c and a hydraulic drive device 6b for the hydraulic cylinder 6a.

The elevating body 4 is formed in a cylindrical tubular part 4a having an open lower part, and a receiving member 2a for supporting a vehicle is provided on the upper surface thereof.
Is slidably guided in the vertical direction by a cylindrical cylindrical guide 5b provided at the end of the cylindrical guide 5b. The sliding portion is made of a bearing metal or a synthetic resin ring having a low friction coefficient. A thin grease film is formed on the sliding surface of the cylindrical portion 4a by a scraper seal 5c in which grease is sealed inside so as to maintain lubricity and rust prevention for a long time. Reference numeral 4b denotes an air hole for venting the hydraulic cylinder 6a provided on the upper part of the elevating body 4.

A work box 7 is attached to the upper portion of the outer periphery of the buried housing 3 by welding.
d, and both working boxes 7
The connection is connected by a connection pipe 8, and each connection portion is sealed by a connection flan # 7c and an O-ring 7d so as to prevent water or the like from entering.

The work box 7 may be omitted if there is room in the buried housing 3.

Next, the tuning device 9 will be described with reference to FIGS.

The tuning device 9 has a function of elevating and lowering while maintaining the same height position of the bearings 2a of the pair of lifts 2, and a connecting rod 11 inserted into the connecting pipe 8.
And a synchronous transmission mechanism 10 erected along each lift 2.

The tuned chain 10a of the tuned transmission mechanism 10 is composed of an upper sprocket 10c and a lower tension roller 10 fixed to a sprocket mounting plate 10b.
d, and both ends of the tuning chain 10a are connected to a lower end plate 4c provided at a lower portion of the elevating body 4. The tension roller 10d is pivotally supported by a slide plate 10f which slides up and down on a sprocket mounting plate 10b by a tension screw 10e.
A chain receiver 10g is provided to prevent the sag from occurring at 0a and to prevent the chain 10a from coming off from the toothless roller.

Also, both sprockets 10 of a pair of lifts 2
c is connected to the connecting rod 11 via a coupling 11a so that the height positions of both lifts 2 are synchronized.

Next, referring to FIGS. 1, 4 to 6, a safety claw, a rack body and a lock releasing means which are safety devices for preventing the fall of the lift will be described.

In the fall prevention safety device 12, the rack body 13 is formed by providing a plurality of locking recesses 13a on one side surface of the rod-shaped body. It is vertically installed so as to be rotatable, and is slidably fitted in a rack hole 4d formed in a lower end plate 4c below the elevating body 4 at a lower portion.

Further, a safety claw 14 which can be locked in each of the locking recesses 13a of the rack body 13 is L-shaped as shown in FIGS. Stop projection 1
4b, and is supported by a claw fulcrum plate 4e standing above the lower end plate 4c as shown in FIG. 4, and is urged by a claw spring 14a in a direction of always engaging with the rack body 13. I have.

Reference numeral 15 denotes a releasing means. The releasing means 15 comprises a pinion 15b and a rack link 15c which are pivotally mounted on the upper part of the rack body 13, and a cylinder 15a provided on the upper part in the buried casing 3. The cylinder 15a is a single-acting air cylinder or a double-acting air cylinder having a return spring built therein.

Note that the pinion 15b is not a 360-degree full circumference but a 90-degree fan shape, because the predetermined angle required for releasing the rack body 13 is 60-90 degrees.

Reference numeral 16 denotes a rotation stopping mechanism for the elevating body 4. The rotation stopping mechanism 16 includes a guide roller 16a provided below the lower end plate 4c of the elevating body 4 and the guide roller 16a.
Guide plate 16b erected in the buried housing 3 so as to sandwich
The rotation stopping mechanism 16 prevents the lifting and lowering body 4 from rotating when the lifting and lowering body 4 is raised and lowered, and the receiving member 2 for supporting the vehicle rotates and the safety claw 14 is locked from the rack body 13. Problems such as detachment and detachment of the tuning chain 10a are prevented.

The rotation stopping mechanism 16 may be a combination of a groove and a guide plate.

Next, the use and operation of the first embodiment of the present invention will be described.

When the pair of lifts 2 is moved up and down, each tuning chain 10a is connected to the lower end plate 4c of each lifting body 4, and both sprockets 10c meshed with the tuning chain 10a are connected by connecting rods 11. Therefore, the two lifting bodies 4 of the two lifts 2 move up and down while maintaining the same height position, and the vehicle supported by the two receiving members 2a does not tilt.

When the elevating body 4 is lifted, the locking projections 14b of the safety claws 14 are locked in the locking recesses 13a of the rack 13 as shown in FIG. The safety claw 14 rotates against the rebound of the claw spring 14a while the upper inclined surface of the locking protrusion 14b is in contact with the notched surface of the locking recess 13a at a predetermined interval of the rack body 13, so that the upward movement of the safety claw 14 is prevented. It does not hinder.

Then, the elevating body 4 is stopped at a desired height, and in this state, even if there is a problem such as oil leakage from the hydraulic circuit of the elevating means 6, the locking projections 14 of the safety claws 14 are provided.
b is locked in the locking recess 13a of the rack body 13 and
Is safe without descending from that position.

When the elevating body 4 is lowered, when the rod 15d of the cylinder 15a is retracted in FIG. 5, the pinion 15b meshed with the rack link 15c is rotated by 90 ° so that the outer periphery of the rack body 13 is a safety claw as shown in FIG. The locking projection 14b is pushed out to release the locking, and the safety claw 14 is brought into contact with the other side surface of the rack body 13 where the locking recess 13a does not exist. Then, from this state, the elevating means 6 is operated to lower the elevating body 4.

When the elevating body 4 is raised for maintenance work, there is no rack on the peripheral surface of the elevating body 4 projecting on the floor as shown in FIG. Guide 5b
It can withstand long-term use with complete lubrication by the scraper seal 5c, and can work safely without hooking work clothes, etc., and even if oil or mud is dropped on the floor, the support top 5a is embedded in the housing. Since the body 3 is sealed, it does not enter the inside, and the lifting / lowering means 6, the tuning device 9, and the fall prevention safety device 12 are protected and can be used for a long time without inspection.

In the first embodiment, an example in which the present invention is applied to a twin lift device for a vehicle has been described. However, the present invention is not limited to this. For example, a fixed lift and a movable lift provided in a pit may be used. The present invention in which a bar-shaped rack body is provided in a moving lift device or a general cylinder-type lift, and the rack is eliminated from the elevating body, may be applied.

Further, the releasing means 15 of the first embodiment is shown as a combination of the pinion 15b and the rack link 15c. However, as shown in FIGS. 7 and 8, the releasing means 15 is fixed to the upper part of the rack body 13. Lever 15e and cylinder link 15
FIG. 7 shows a locked state. When the rod 15d of the cylinder 15a is retracted in the direction of the arrow, the release lever 15e is moved 90 degrees through the cylinder link 15f.
8, the outer periphery of the rack 13 pushes the locking projection 14b of the safety claw to release the locking as shown in FIG.

The mechanism for rotating the rack 13 by 90 ° is not limited to these, but may be a method of pulling a chain or a rope, or a method such as a rotary actuator.

Next, a second embodiment of the present invention will be described with reference to FIGS.

The second embodiment is another example of a safety device for preventing a lift provided in the work box from falling.
Except for the fall prevention safety device, it is the same as the first embodiment.

The fall prevention safety device 17 according to the second embodiment is provided with a ratchet wheel 18 mounted on an extension shaft 11b of the connecting rod 11 of the tuning device 9 and a lockable with the ratchet wheel 18. It comprises a ratchet 19 and its lock releasing means 20.

In FIG. 9, the ratchet wheel 18 is mounted on an extension shaft 11b between the sprocket 10c and the connecting rod 11, and the ratchet 19 is supported at a fulcrum 19a on a protruding plate 19b fixed in the connecting box 7. Have been.

In FIG. 10, a ratchet spring 19c is stretched between a release lever 20a extending from the ratchet 19 and a spring mounting plate 19d provided on the work box 7, so that the ratchet 19 is always on the ratchet wheel 18. It is biased in the locking direction.

A fixed pin 20d is inserted into a long hole 20b provided below the release lever 20a at the tip of a rod 20e of a release cylinder 20c.

Next, the operation of the second embodiment will be described.

When the elevating body 4 is lifted, the ratchet wheel 18 is moved by the tuning chain 10c attached to the elevating body 4.
Rotates in the direction of the arrow in FIG.
Is rotated clockwise against the resilience of the ratchet spring 19c while being in contact with the tooth profile of the ratchet wheel 18, so that it does not hinder the elevating body 4 from rising.

The elevating body 4 stops at a desired height and stops even if there is a problem such as oil leakage from the hydraulic circuit.
And the elevating body 4 is safe without descending therefrom.

When the lifting body 4 is lowered, the release cylinder 2
When 0c is retracted in the direction of the arrow, the ratchet 19 is rotated clockwise to release the lock, and the lifting body 4 is lowered.

Here, the advantage of the durability and the safety is the same because there is no rack in the elevating body as in the first embodiment.

[0044]

As described above, according to the present invention, there is no rack in the elevating body, and the ingress of water and dust is prevented by the closed structure, and high durability and safety are obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a vehicle lift according to a first embodiment of the present invention.

FIG. 2 is a plan view of the floor side.

FIG. 3 is a front view of a tuning transmission mechanism.

FIG. 4 is a sectional view when the lift is lifted.

FIG. 5 is an explanatory view when the fall prevention safety device is locked.

FIG. 6 is an explanatory view when the fall prevention safety device is released.

FIG. 7 is an explanatory diagram when another release unit is locked.

FIG. 8 is an explanatory diagram when another release unit is released.

FIG. 9 is a side view of a fall prevention safety device according to a second embodiment of the present invention.

FIG. 10 is a front view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Twin lift device for vehicles 3 Buried housing 4 Lifting body 5a Lid 8 Connecting pipe 10 Synchronous transmission mechanism 11 Connecting rod 12 Fall prevention safety device 13 Rack body 14 Safety claw 15 Release means 16 Rotation stopping mechanism 17 Fall prevention safety device 18 Ratchet wheel 19 Ratchet 20 Lock release means

Claims (5)

[Claims] 1. A vehicle lift having a lift member having a support member for a vehicle at an upper end thereof provided on a floor surface in a buried housing extending downward from the floor surface so as to be capable of raising and lowering, a plurality of notches are provided. The rod-shaped rack body provided is vertically suspended in the buried housing along the elevating body, and a safety claw that can be locked in a notch of the rack body is provided at a lower portion on the outer periphery of the elevating body. A safety device for preventing vehicle lifts from falling. 2. A claw releasing means for releasing locking of the safety claw is provided in the buried housing, and the rack body is a rod-shaped body, and the cutouts are vertically arranged on one side surface of the rack body. 2. The vehicle lift prevention device according to claim 1, wherein the claw releasing means rotates the rack body by a predetermined angle to bring the safety claw into contact with another side surface where the notch does not exist. Safety device. 3. The rack according to claim 2, wherein the claw releasing means comprises a pinion provided on an upper portion of the rack body, a rack meshing with the pinion, and a cylinder or a solenoid for moving the rack forward and backward. Safety device for preventing vehicle lifts from falling. 4. The claw release means comprises a release lever provided at an upper portion of the rack body, and a cylinder or a solenoid for rotating the release lever.
4. The safety device for preventing a vehicle lift from falling according to claim 1. 5. A bottomed, tubular, buried housing extending on the floor surface and extending downward from the floor surface is provided on each of the left and right sides. A lid that inserts and supports the elevating body of the cylindrical body that can be raised and lowered is detachably hermetically sealed, and the upper peripheral portions of both the buried housings are connected and connected by a connecting pipe, and the connection is inserted into the connecting pipe. Both ends of a rod are connected to the elevating body via a synchronization transmission mechanism, a ratchet wheel pivotally mounted on the connecting rod or an extension shaft thereof, and a ratchet that can be locked to the ratchet wheel,
A safety device for preventing a vehicle lift from falling, comprising these unlocking means.