JP2568485Y2 - Safety equipment for vehicle lifts - Google Patents

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 an underground buried hydraulic lift system used in an automobile repair shop or the like.

[0002]

2. Description of the Related Art Conventionally, there has been known a vehicular lift device which raises and lowers a vehicle cradle by operating a pair of hydraulic lifting devices on both sides having a vehicle cradle at an upper end thereof in synchronism with each other.
In general, a ratchet-type safety device is provided in this type of lift device. And this type of conventional ratchet type safety device has a structure in which the latch of each hydraulic lifting device is connected to a separate latch release mechanism which is usually formed by a solenoid, and when the latch moves forward with respect to the ratchet teeth. Is transmitted to each latch release mechanism.

[0003]

In the above-mentioned conventional safety device, since the latch of each hydraulic elevating device is connected to a separate release mechanism, the mechanism becomes complicated. Since the movement is always transmitted to each release mechanism, there is a problem that the release mechanism always operates uselessly together with the latch when the hydraulic elevating device rises, thereby shortening the life of the release mechanism.

In view of the above, the present invention has been made to solve the above-mentioned problem, and the latch of each hydraulic lifting device can be operated by a single release mechanism, and the swing of the latch is not transmitted to the release mechanism. Another object of the present invention is to provide a vehicle lift safety device that can extend the life of a release mechanism.

[0005]

According to the present invention, in order to solve the above-mentioned problem, a pair of hydraulic pressures on both sides provided with a vehicle pedestal at an upper end and provided so as to raise and lower the vehicle pedestal in synchronization with each other. In a vehicle lift device provided below the floor surface F, which includes a lifting unit 7, 7 and a hydraulic unit 10 for supplying a hydraulic pressure to the hydraulic lifting unit 7, 7, along with each of the hydraulic lifting units 7, 7, Vertical ratchet teeth 21, 21
A row is provided, and a pair of hydraulic lifting devices 7, 7 are connected to each other by a horizontal stay 13 between the lifting and lowering portions.
The pair of latches 20, 20 are pivotally biased by being constantly engaged with the ratchet teeth 21, 21 so as to be pivotally engaged.
A pair of operating rods 25, 25 are provided on the upper side such that the distal end faces the base end side of each of the latches 20, 20 so as to be able to advance and retract in the axial direction.
The distal ends of the pair of operation rods 25, 25 always allow the latches 20, 20 to freely swing without contacting the respective latches 20, 20. The engagement with the ratchet teeth 21 and 21 is releasably arranged, and the other ends of the pair of operation rods 25 and 25 are connected to a center rod 28, and the pair of operation rods 25 and 25 are rotated by rotation of the center rod 28. 25 can be moved forward and backward at the same time, and the center rod 28 can be rotated manually or electrically to constitute a safety device.

[0006]

In the safety device of the present invention, the hydraulic lifting device 7
During the upward movement, the latch 20 is engaged with the ratchet teeth 21 in the forward direction, thereby allowing the upward movement. However, the latch 20 acts to reliably prevent the lowering operation.

While the hydraulic elevating device 7 moves upward, the latch 20 repeatedly swings.
Is not in contact with the operation rod 25, the operation is not transmitted to the release mechanisms such as the operation rod 25 and the center rod 28. On the other hand, when the engagement between the latch 20 and the ratchet teeth 21 is released, the pair of operating rods 25, 25 are advanced simultaneously by rotating the center rod 28 manually or electrically. Each latch 20 at the tip
To release the engagement with the ratchet teeth 21 so that the hydraulic lifting device 7 can be lowered.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional front view of a vehicle lift device according to the present invention with a part omitted, FIG. 2 is a perspective view of a box body, FIG. 3 is a front view of a hydraulic lift device partially cut away, and FIG. FIG. 5 is a plan view of the safety device.

1 and 2, reference numeral 1 denotes a main box, and 2 denotes a unit box, both of which are buried under the floor surface F.

The main box 1 is a rectangular tube member 3 having a substantially C-shaped cross section and standing upright and opposed to each other with the slit portion 3a facing inward.
, A side plate 4 and a bottom plate 5 are attached to each other, and the upper side is open. The upper opening is closed by a lid 6 that can be opened and closed. The main box 1 houses a hydraulic lifting device 7 and a safety device 8.

The unit box 2 is fixed to the outside of the upper side of the side of the main box 1, and its upper opening is closed by a lid 9 which can be opened and closed. In the unit box 2, a hydraulic unit 10 for supplying hydraulic pressure to the hydraulic lifting devices 7, 7 is accommodated.

The hydraulic elevating devices 7, 7 are provided in the rectangular tube member 3 of the main box 1, respectively. That is, the guide tube 11 is fixed to the upper part of the square tube member 3. An upper flange portion 11a of the guide tube 11 is bolted onto a receiving table 3b provided at four inner corners of the upper portion of the rectangular tube member 3.

The upper end of the guide cylinder 11 penetrates through the lid 6 and projects from the upper surface of the lid 6.

Further, an elevating cylinder 12 which can be moved up and down while being guided by the guide cylinder 11 is inserted into the guide cylinder 11. A vehicle cradle (not shown) is horizontally fixed to an upper end of the elevating cylinder 12, and a lower end is open. The size of the vehicle cradle (not shown) is set so as not to protrude outward from above the main box 1, and the unit box 2 is located at a position separated from the lifting mechanism of the hydraulic lifting devices 7, 7. In other words, the rear of the elevator does not exist above the unit box 2.

The lower ends of the lifting cylinders 12, 12 on both sides are connected by a stay 13, so that they can always move up and down at the same time. The connecting portion between the stay 13 and the elevating cylinder 12 (in the illustrated embodiment, a ring 12c fitted and fixed to the outer periphery of the elevating cylinder 12) contacts the lower end of the guide cylinder 11 when ascending and regulates the upper limit. It is a stopper.

Further, a plunger 14 is suspended from the elevating cylinder 12. That is, the plunger 14
Is pivotally supported by a bracket 12b provided on an upper end lid 12a of the elevating cylinder 12 at the upper end with a horizontal upper shaft 15, and extends vertically into the elevating cylinder 12.

A bracket 16 is mounted on the bottom plate 5 in the rectangular cylindrical member 3, and a lower end of a cylinder 18 is pivotally mounted on the bracket 16 by a lower shaft 17 which is orthogonal to the upper shaft 15. Have been. The upper portion of the cylinder 18 is open, and the plunger 14 is slidably received therein. The lower shaft 17 is formed integrally with a cylinder 18, and an oil passage passing through the lower shaft 17 is
Communicates within.

The cylinder 18 is of a single-acting type, and hydraulic oil from the hydraulic unit 10 is guided to the oil passage by a hydraulic supply passage 40. Since the stay 13 comes into contact with the lower end of the guide cylinder 11 to serve as a stopper, there is no stopper mechanism between the plunger 14 and the cylinder 18 and the structure is simple to assemble.

The hydraulic lifting device 7 has a flange 11a and a bottom plate 5 of the main box 1 for fixing the lower portion thereof.
The connection rod 3 between the bracket 16 placed on
7, 37, 37, 37, this connecting rod 3
7, 37, 37, and 37 have a length for pressing the bracket 16 against the bottom plate 5 (downward).

Then, the safety device 8 which is a main part of the present invention is provided.
Is for preventing an accident in which the hydraulic lifting device 7 is unexpectedly lowered when the vehicle is lifted up,
The latch 20 is engaged with the ratchet teeth 21 to prevent the lowering. That is, the latch 20 is
, Which are pivotally attached to both ends of the stay 13.
Thus, the tip is constantly urged to rotate in the direction in which the tip engages with the ratchet teeth 21. The ratchet teeth 21
Is mounted on the side surface of the rectangular cylindrical member 3 and a rack or the like may be used. In this embodiment, a plate is used in which a suitable number of window holes are juxtaposed in the vertical direction.

On the stay 13, a bracket 2 is provided.
An operation rod 25 is provided to be able to advance and retreat in the axial direction via 4, and the engagement with the ratchet teeth 21 is released by pushing the base end side of the latch 20 with the tip thereof. The operation rod 25 is urged in the backward direction by the spring 19 and does not always contact the latch 20. Therefore, the latch 20 swings freely at all times,
The movement is not transmitted to the operation rod 25.

The other end of the operating rod 25 is
Square sleeve 38 via link 26 and lever 27
It is connected to. The sleeve 38 is inserted into the center rod 28 so as to be slidable up and down and cannot rotate relative to each other. The center rod 28 has a prismatic shape (of course, may be a square pipe shape).
9, is rotatably supported by the side plate 4 of the box 1 via the bracket 30, and is hung down at a central portion in the box 1.

Further, the upper end of the center rod 28 is connected to a solenoid 33 via a lever 31 and a link 32. When the solenoid 33 operates, the operation rods 25 on both sides are simultaneously pushed via a sleeve 38. Each latch 20 is pushed around (opens in the horizontal direction in FIG. 1).

Further, a limit switch 34 is provided on the bracket 30, and its arm is in contact with a side surface of a lever 34a protruding from the center rod 28. By detecting the rotation of the lever 34a with the limit switch 34, the release state of the latch 20 is detected.

One end of a manual operation cord 36 is attached to the upper end of the center rod 28 via a lever 35. The cord 36 is pulled out to the side and can be operated at an appropriate position (not shown in the embodiment,
) Is connected to the manual operation handle. The manual operation cord 36 is used when the solenoid 33 cannot be operated due to a power failure or the like.
, The center rod 28 is rotated, the operating rod 25 is pushed, the latch 20 is pulled off, and the vehicle can be lowered. In order to lower the vehicle lifted up at the time of the power failure, a manual valve (not shown) may be operated to return the hydraulic oil in the cylinder 18 to the tank.

The unit box 2 is provided with a hydraulic lift 7
Is disposed at a lateral position off a vehicle receiving stand (not shown), and a hydraulic unit 10 is incorporated therein. Therefore, when the vehicle is lifted up, inspection and maintenance of the hydraulic unit can be performed at a position deviated from below the vehicle.

In the vehicle lift device of this embodiment, when hydraulic oil is sent from the hydraulic unit 10 into the cylinder 18, the plunger 14 moves up together with the elevating cylinder 12 to lift the vehicle. The pair of left and right elevating cylinders 12
Since they are combined and integrated at 3, the lifting and lowering operations of both are synchronized. The sleeve 38 rises with the stay 13 along the center rod 28.

When the elevating cylinder 12 is raised, the latch 20 is engaged with the row of the ratchet teeth 21 in the forward direction, and allows the ascending while repeating the swing. At this time, the latch 20 does not come into contact with the operation rod 25 and does not transmit its swing to the operation rod 25.

When the elevating cylinder 12 rises to the upper limit, the connecting portion between the stay 13 and the elevating cylinder 12 is connected to the guide cylinder 1.
1 to abut the lower end to prevent any further ascent. In this state, the latch 20 is engaged with the ratchet teeth 21 (exactly, not in the engaged state, but in the true engaged state when the elevating cylinder 12 is lowered). Even if the oil in the cylinder 18 escapes due to the
Does not fall. In addition, there is a usage example in which the elevating cylinder 12 is not moved up to the uppermost end but is moved up halfway.
In this case, even if the oil in the cylinder 18 escapes, if the elevating cylinder 12 descends, the latch 20 will eventually engage with the nearest lower ratchet tooth 21 and stop descending.

When lowering the elevating cylinder 12, the solenoid 33 is energized (excited) to rotate the center rod 28. The rotation of the center rod 28 is transmitted to the sleeve 38, and the operation rods 25 on both sides are simultaneously pushed out via the lever 27. Then, both latches 20 are simultaneously pushed around to release the engagement with the ratchet teeth 21. In this state, the hydraulic cylinder returning the hydraulic oil in the cylinder 18 to the oil tank of the hydraulic unit 10 is opened to lower the lifting cylinder 12. When the solenoid 33 is deenergized (demagnetized), the operating rod 25 is the spring 19, and the latch 20 is the spring 23.
The latch 20 engages with the ratchet teeth 21 when the elevating cylinder 12 lowers unexpectedly again.
In a state where it can be prevented from falling.

When the solenoid 33 does not operate due to a power failure or the like, the sleeve 38 is rotated by pulling the manual operation cord 36 to release the latch 20, and the manual valve is operated to lower the lifting cylinder 12 as described above. .

When the oil in the cylinder 18 leaks and the safety device 8 is actuated, the solenoid 33 is energized (excited) because the latch 20 is firmly engaged with the ratchet teeth 21.
Even so, the engagement cannot be removed. In this case, the hydraulic union 10 may be slightly moved, the operating oil may be fed into the cylinder 18 by a fixed amount, and then the solenoid 33 may be energized.

The inspection and maintenance of the hydraulic unit 10 is performed on the floor F with the lid 9 at the upper part of the unit box 2 opened. With the lifting cylinder 12 raised and the vehicle lifted up,
If it becomes necessary to check and maintain the hydraulic unit 10,
This can be done at a safe location off the bottom of the vehicle.

In the figure, reference numerals 41 and 42 denote hydraulic supply passages 40.
Alternatively, the main box 1 and the unit box 1 are communicated with each other by a pipe portion through which electric wires and the like, which are not shown in the figure, pass, avoiding the rectangular tube member 3.

[0035]

As described above, in the present invention, the ratchet teeth 21 and 2 are vertically arranged along the respective hydraulic elevating devices 7 and 7.
One row is provided, and the elevating units of the pair of hydraulic elevating devices 7, 7 are connected to each other by a horizontal stay 13, and the stay 13 is urged to rotate so as to always engage with the ratchet teeth 21, 21. And a pair of operating rods 25, 25 are provided on the stay 13 such that the distal end faces the base end side of each of the latches 20, 20 so as to be able to advance and retreat in the axial direction. The distal ends of the pair of operating rods 25, 25 do not always contact the latches 20,
Is allowed to swing freely, but each of the latches 20 and 2 is moved forward.
0 is pushed and turned to disengage the engagement with the ratchet teeth 21, 21, and the other ends of the pair of operation rods 25, 25 are connected to the center rod 28,
, The pair of operating rods 25, 25 can be moved forward and backward at the same time, and the center rod 28 can be rotated manually or electrically to form a safety device. Therefore, the latch of each hydraulic lifting device is released by a single release mechanism. It is possible to provide a safety device for a vehicle lift that can be operated and does not transmit the swing of the latch to the release mechanism, and has a long life of the release mechanism.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a vehicle lift device according to the present invention with a part thereof omitted.

FIG. 2 is a perspective view of a box.

FIG. 3 is a front view in which a part of the hydraulic lifting device is cut away.

FIG. 4 is a front view of the safety device.

FIG. 5 is a plan view of the safety device.

[Explanation of symbols]

 7 Hydraulic lifting device 21 Ratchet teeth 13 Stay 20 Latch 25 Operation rod 28 Center rod

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of hydraulic lifting devices, each having a vehicle cradle at an upper end thereof and provided to raise and lower the vehicle cradle in synchronization with each other, and a hydraulic unit for supplying hydraulic pressure to the hydraulic lifting devices. In a safety device for a vehicle lift provided below the floor surface, a ratchet tooth row is provided vertically along each of the hydraulic lifting devices, and a horizontal stay is provided between the lifting units of the pair of hydraulic lifting devices. The latches are connected to each other, and a pair of latches are pivotally mounted on the stay by rotatingly biasing them so as to always engage with the respective ratchet teeth. On the stay, the front end faces the base end side of the respective latches. In addition, a pair of operating rods are provided so as to be able to advance and retreat in the axial direction, and the distal ends of the pair of operating rods always allow the latches to freely swing without contacting the latches. Push and ratchet teeth The other end of the pair of operation rods is connected to a center rod, and the pair of operation rods can be simultaneously advanced and retracted by rotation of the center rod. A safety device for a vehicle lift, which is capable of being electrically operated for rotation.