JPH0730640Y2 - Buried twin auto lift for vehicle maintenance - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention is to connect a twin lift oil cylinder for lifting and lowering embedded in a pit with a connecting member, and to prevent a vehicle cradle from descending. The present invention relates to an embedded twin auto lift for vehicle maintenance in which a coupling member and an engagement release mechanism for releasing the engagement between the combination members are provided in a pit.

(B) Conventional technology The conventional buried twin auto lift is used in Japanese Patent Application No. Sho 59-18122.
No. (Actual Development No. 60-130294) microfilm is available, and as shown in FIG.
(4) having a top end and fitting in the packing (7)
A guide roller (8) that guides the pillar (4) up and down by a chain hoisting device (10), a connector (6) that connects the lower parts of the pillar (4), and the connector (6) Provided on the rack and engaging with the rack (12a) (1
2b), a device is disclosed in which a release cam (12d) that rotates coaxially with the claw (12b) is rotated to release the engaging claw (12b) from the rack (12a). .

However, since the worker is located on the ground side with respect to the release cam (12d) provided on the vertically movable connecting body (6), the release cam (12d) is activated. It is necessary to provide a driving member to the ground side and surely interlock the release cam (12d) with the driving member. The lift cam may not be able to be lowered by releasing the release cam (12d) because it cannot reliably interlock. Moreover, in order to repair the malfunctioning interlocking part, it is necessary to work under the lifted lift, so that reliability of the interlocking part that does not cause such a malfunction is required.

In view of the drawbacks of the above-mentioned embedded twin auto lift for vehicle maintenance, the present invention has a simple structure to ensure the synchronized operation of both lifts and prevent the vehicle cradle from descending. In addition, it is intended to improve the operability, durability and maintainability of the lift. The structure is such that an outer cylinder having a vehicle pedestal at the upper end and fitted in a guide cylinder, and the outer cylinder. A twin auto lift comprising: a piston rod that moves up and down by a hydraulic drive unit; a tuning beam that connects the lower parts of the outer cylinders to each other; and a locking claw that is provided on the tuning beam and that engages with a rack. A pawl removing rod that comes into contact with a rotary protrusion that rotates coaxially with a stop pawl and that is movable in parallel with the rack, and a way that the rotary protrusion releases the locking pawl from the rack. And a pawl removing knob that pushes in a direction, and the pawl removing knob is provided on a floor surface on which the lift is installed.

E action In the embedded twin auto lift for vehicle maintenance, in which the vehicle cradle is moved up and down by the hydraulic drive unit synchronously via the connecting member, when the engagement of the locking claw with the rack is released when the vehicle cradle is lowered. In this case, the claw removing knob provided on the floor so as to be movable in parallel with the rack is pressed by the claw removing knob on the floor in the direction in which the locking claw is disengaged from the rack. The pressing force is transmitted by coming into contact with the projection, and the locking claw is coaxially rotated to release the engagement from the rack.

F. Embodiments Embodiments of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a box containing a twin lift, the lower surface of a cover 2 of which is buried in a pit P, and elevators 3 and 3 are provided at both ends of the box 1, respectively. There is.

Since the lifting devices 3 and 3 have the same structure and are arranged symmetrically, only one lifting device will be described below, and description of both will be omitted.

A piston rod 5 as a cylinder operating cylinder having an oil passage 4 formed therein is vertically provided on the central axis of the lifting device. A piston 6 having an oil passage having the same diameter as the oil passage 4 of the piston rod 5 is coupled to the head of the piston rod 5.

A mechanism as an ascending / descending oil cylinder that is slidably fitted onto the piston 6 is configured as follows. That is, the outer cylinder 7 is vertically provided, and the inner cylinder 8 is vertically provided coaxially with the outer cylinder 7 inside the outer cylinder 7. The outer cylinder 7 and the inner cylinder 8 are integrally coupled at their upper end portions, and their lower end portions are integrally coupled at a portion other than the diameter of the hollow portion fitted onto the piston 6, It forms a double cylinder.

A flange portion of a guide cylinder 10 which is slidably fitted on the outer cylinder 7 and guides the vertical movement of the outer fitting 7 is fixed to the cover 2 of the box 1.

A single cylinder ram cylinder may be used instead of the outer cylinder 7 and the inner cylinder 8 forming the double cylinder as the lifting oil cylinder.

A support metal 11 is fixed to the lower end portions of the outer cylinder 7 and the inner cylinder 8, and the support metals 11, 11 of both the lifting devices are integrally connected by a prismatic tuning beam 12 as a connecting member. ing.

Therefore, the two cylinders 7, 7 can be reliably synchronized with each other,
Further, the backlash of the outer cylinders 7, 7 guided by the two guide cylinders 10, 10 respectively is reduced.

An oil pipe 13 is provided in the oil passage 4 at the lower end of the piston rod 5.
The oil pipe 13 is connected via a manifold 14 to a hydraulic drive unit (not shown) attached to the inside or outside of the box 1.

Therefore, when the hydraulic drive unit is operated to supply oil, the hydraulic pressure passes from the manifold 14 through the oil pipes 13, 13 connected to the elevating devices 3, 3 at both ends of the box and the oil passages 4 of the piston rod 5, respectively. After that, it flows into the upper part of the piston 6, the outer cylinder 7 and the inner cylinder 8 rise, and the vehicle pedestal 9 rises. When the vehicle cradle is lowered, contrary to the above, pressure oil is discharged from the oil passage 4 of the piston rod 5 to the oil pipe 13 by the operation of the hydraulic drive unit, and an oil tank (not shown) of the hydraulic drive unit is shown. Flow into.

Further, as shown in FIG. 3, a rack 15 for preventing the lowering of the vehicle pedestal is vertically installed between the two lifting devices 3 and 3 and in the vicinity of the tuning beam 12, with its tooth surface facing the tuning beam side. Has been done.

An engaging member is formed at a position of the tuning beam 12 facing the tooth flank of the rack 15 as follows. That is, the two side plates 16, 16 are fixed to each other across the upper surface of the tuning beam 12 and the side surface of the tuning beam 12 facing the tooth surface of the rack 15.
16 and 16 are provided with a counterweight 17 on their backs, and in the normal state, the tip thereof is the counterweight 17
Due to the gravitational action of, the locking claws 18 that come into contact with the lower surfaces of the serrated engagement teeth of the rack 15 are axially attached. On the outer surface of the side plate 16 on the left side (indicated by the left side in FIG. 3), there is provided a rotator 20 having a rotary protrusion 19 at the lower end thereof and coaxially rotating with the locking claw 18. .

Further, on the left side of the rack 15, a claw removing rod 21 is attached in parallel with the rack 15 via links 22 and 23 provided at the upper end and the lower end of the rack 15, respectively. The nail remover rod 21
Is connected to a claw removal holding link 25 attached to the lower end of the claw removal knob 24 on the upper surface of the cover 2 by a chain 27 via two sprockets 26, 26. Therefore, when the nail removing knob 24 is pulled upward, the free end of the nail removing holding link 25 rises and pulls the chain 27, so that the nail removing rod is
21 moves in parallel in the front-rear direction to approach the tuning beam 12, and presses the rotation protrusion 19 of the rotator 20. Therefore, the rotator 20 rotates to the tuning beam side, and the locking claw 18 that makes coaxial rotation therewith also rotates in the same direction, and the engagement with the rack 15 is released.

On the other hand, when the claw removal holding knob 24 is pushed down in the opposite direction to the above, the action of the claw removal holding link 25, the chain 27, etc.
Since the pawl removing rod 21 is separated from the tuning beam 12, the pressing of the rotator 20 against the rotative projection 19 is released, and the rotator 20 becomes free, so that the locking claw 18 that makes coaxial rotation therewith is also released. The action of the counterweight 17 makes contact with the lower surfaces of the engaging teeth of the rack 15 to prevent the vehicle pedestal from descending. This claw removal knob 24
You can also press down to operate by stepping on
It is extremely convenient for work.

In the above-described embodiment, since the locking claw 18 that engages with the rack 15 can be provided in the tuning beam 12, it is sufficient to provide only one set of the rack 15 and the engaging member, which also serve as both lifting devices, and has a simple structure. A mechanism for preventing the vehicle pedestal from descending can be obtained. Also,
Two sets of these may be provided if necessary. And
The racks and the engaging members may be provided on a tuning beam extending outside the lifting oil cylinders.

Further, in the above embodiment, the engagement releasing mechanism including the link and the chain has been described, but as the engagement releasing mechanism, the claw disengaging rod and the claw disengaging knob are connected by the cam instead of the chain, thereby preventing the descending function. The operation when releasing is reliable.

In the above embodiment, the main part of the lifting device, the synchronizing operation mechanism, the mechanism for preventing the vehicle pedestal from descending, etc. are all housed in the box 1 with the cover 2, and the entire box 1 is in the pit. Although they are stored, these mechanisms may be stored directly in the pit provided with the cover 2 without using the box 1. Therefore, in any of the above cases, since only the vehicle support base 9 and the outer cylinder 7 in the raised state are exposed on the floor surface, there is nothing obstructing the work on the floor surface and the appearance is beautiful. There is no loss.

Further, since the mounting portion on the upper surface of the guide cylinder 10 and the sliding portion of the outer cylinder 8 are completely sealed, muddy water, dust and the like do not enter the box 1 during car washing, and therefore the frequency of failure is low and always good. Function can be maintained.

The present invention has a simple structure in which, as described above, the claw removing rod that operates the release cam and the claw removing knob that interlocks with the claw removing rod are provided on the ground side, and the vibration of the tuning beam that is moved up and down is reduced. The operation of the claw removal knob can be reliably linked to the release cam without being affected by the above.

Also, since the pawl remover rod is provided in parallel with the direction in which the tuning beam is moved up and down, the release cam and the pawl remover rod can be interlocked at any position of the tuning beam, so by improving the certainty, both vehicle receiving The function for preventing the table from lowering can be ensured.

Furthermore, by storing these mechanisms in the pit, it is convenient for car washing and other maintenance work on the floor, good function can be maintained, and aesthetics can be maintained. Its practical value is great.

[Brief description of drawings]

1 is a partial sectional perspective view showing an embodiment of the present invention, FIG. 2 is a partially enlarged view of a lifting device, FIG. 3 is a synchronizing operation mechanism, an engagement mechanism for preventing a vehicle cradle from descending, and its engagement. FIG. 4 is a partially enlarged view of the release mechanism, and FIG. 4 is a schematic explanatory view of a conventional twin auto lift for vehicle maintenance. 1 ... Box, 2 ... Cover, 3 ... Lifting device, 4 ...
… Oil passage, 5 …… Piston rod, 6 …… Piston, 7 …… Outer cylinder, 8 …… Inner cylinder, 9 …… Vehicle cradle, 10 ……
Guide cylinder, 11 …… Support metal, 12 …… Tuning beam, 13
…… Oil pipe, 14 …… Manifold, 15 …… Rack, 16…
… Side plate, 17 …… Counterweight, 18 …… Locking claw, 19
...... Rotating protrusion, 20 ...... Rotator, 21 ...... Claw removing rod, 22,
23 …… Link, 24 …… Claw disengagement knob, 25 …… Claw disengagement holding link, 26 …… Sprocket, 27 …… Chain, 28 …… Ram, 29 …… Cylinder, 30 …… Rack, 31 …… Pinion,
32 …… Shaft, 33 …… Rod, 34 …… Tuning box,
35: Roller, 36: Tuning beam, 37: Rack storage box, F: Floor surface, P: Pit

Claims (1)

[Scope of utility model registration request] 1. An outer cylinder (7) having a vehicle pedestal (9) at its upper end and fitted in a guide cylinder (10); and the outer cylinder (7).
A piston rod (5) for moving up and down by a hydraulic drive unit, a tuning beam (12) connecting the lower parts of the outer cylinder (7), and a rack (15) provided on the tuning beam (12). A twin auto lift having a locking claw (18) for mating with the locking claw (18), which is provided so as to be in contact with a rotary protrusion (19) that rotates coaxially with the locking claw (18) and to be movable in parallel with the rack (15). The locking claw (1) from the rack (15) to the claw removing rod (21) and the claw removing rod (21).
Equipped with a claw removal knob (24) that presses 8) in the direction of removal,
The buried type twin auto lift for vehicle maintenance, wherein the nail removing knob (24) is provided on the floor surface on which the lift is installed.