JP4359443B2 - Vehicle maintenance lift - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle maintenance lift that raises a vehicle, and more particularly to a vehicle maintenance lift in which a lift body is housed on a floor and the upper surface of the lift is flat with respect to the floor surface when the lift is lowered.
[0002]
[Prior art]
When the lift is lowered, the lift body is housed on the floor, and the vehicle maintenance lift in which the in-vehicle stand is flat with respect to the floor surface can effectively use the work space and can smoothly lift up (lift) low-floor vehicles. Therefore, it is widely used.
In such a lift, the lift main body is stored in a pit recessed in the floor, and when the lift is lowered (lowered), the pit is closed and flattened by the vehicle-mounted base, but the pit is exposed in the lifted-up state. Therefore, a device has been devised for closing the generated concave portion in consideration of workability and safety.
As such a lift, the thing of the structure of patent document 1 or patent document 2 is known, for example, in patent document 1, the cover plate for closing a pit is provided in a pit, and the vehicle-mounted base which mounts a vehicle is provided. When the cover is lifted, the cover plate is biased by the coil spring and lifts to close the pit.
Moreover, in patent document 2, the pit which stores the connection beam which connects the right and left vehicle-mounted bases of a lift provided with a pair of parallel vehicle-mounted bases is obstruct | occluded with the cover table which moves up and down in a pit.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-44945 [Patent Document 2]
Japanese Patent No. 3373393 [0004]
[Problems to be solved by the invention]
However, in the case of the lift described in Patent Document 1, the pit can be closed with a simple structure. However, since the lift is moved up and down by a cylinder (plunger) provided vertically at the lower part of the lift, a deep hole for embedding the cylinder is used. In addition to the pits provided on the floor, the recesses must be formed deeply.
Further, in the case of the lift described in Patent Document 2, since the lift is moved up and down by an X-type link mechanism, the recess may be formed only in the pit portion that houses the lift, but the pit is completely closed after the lift is lifted. The link mechanism forming part was left open.
Accordingly, in view of the above problems, the present invention has an object to provide a vehicle maintenance lift that can flatten the entire pit when the lift is lifted even if the lift is moved up and down by a link mechanism such as an X-type. And
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is configured such that the vehicle-mounted table is moved up and down by lift lifting means provided below the vehicle-mounted table so that the mounting surface of the vehicle-mounted table is substantially flush with the floor surface when lowered. In addition, in the lift for vehicle maintenance comprising the lift lifting means stored in a pit recessed in the floor, the lift lifting means is composed of a lower lifting means that moves up and down in the pit and a link mechanism that extends vertically. was on was formed in two upper and lower stages of the lifting means, placing the vehicle platform in its top with a cover plate for closing the pit at the top of the lower lifting means is provided, placing the upper lifting means to the cover plate When the vehicle mount is raised, the lower lift means is lifted and then the upper lift means is lifted, while the vehicle lift is lowered when the vehicle lift is lowered. After letting The serial under lifting means by lowering operation, the cover plate, characterized that you close the normally pit opening surface in the vehicle platform of the lifting operation.
According to this vehicle maintenance lift, the lift raising and lowering means are provided on the upper and lower sides, respectively, and the cover plate can be raised as if the bottom of the pit is raised by the action of the lower raising and lowering means. Even in the state, the entire pit can be closed well.
In addition, since the lift raising / lowering means are provided in two stages, if the cover plate is first raised during the lift-up operation, and the cover plate is lowered after the upper raising / lowering means is lowered during the lift-down operation, the pit is always Can be operated in a closed state, and tools and parts do not inadvertently enter the pit.
Furthermore, with this configuration, the upper lifting / lowering means for moving the vehicle-mounted base can be completely formed on the cover plate, and the pit can be shallowed. In addition, the pit can be completely closed even when the vehicle mount is raised.
Furthermore, with this configuration, in addition to the lifted state of the vehicle mount, the pit can be closed at all times by closing the pit during the lifting operation of the vehicle mount. There is no such thing as getting in.
[0008]
According to a second aspect of the present invention, in the first aspect of the present invention, the on-board base, the lift lifting means, the pit, and the cover plate are all arranged in a pair on the left and right sides, and the lifting movement is interlocked. It is characterized by being moved up and down on each of the vehicle-mounted tables.
With this configuration, when the vehicle is lifted up, a work space is formed in the center of the lower part of the vehicle from the front to the rear, so that the vehicle maintenance work is easy.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. FIG. 1 is a side view illustrating an example of a vehicle maintenance lift (hereinafter simply referred to as a lift) according to the present invention, and a front side plate and the like are omitted. In the figure, 1 is a vehicle-mounted base on which a vehicle is placed, 2 is a lift lifting / lowering means for moving the vehicle-mounted base 1 up and down, 3 is a pit formed on the floor 5 to store the lift, and 4 is a pit 3 closed when lifted up A cover plate is shown.
[0010]
The lift raising / lowering means 2 is formed in two stages of a lower lift 2a that moves up and down in the pit 3 and an upper lift 2b that moves up and down in the upper part thereof. The cover plate 4 is provided on the lower lift 2a, the upper lift 2b is assembled on the cover plate 4, and the vehicle-mounted base 1 is formed on the upper lift 2b. Thus, the vehicle-mounted base 1 is configured to move up and down mainly by the upper lift 2b.
The lower lift 2a includes an X-type link 8 that expands and contracts vertically on a base 7 fixed to the bottom of the pit 3, a column 9 having a bending shaft 9a in the center, and a column 9 that extends and bends to lower the lift. A first cylinder 10 that moves up and down 2a is provided.
The X-type link 8 is formed such that one end (the left end in the drawing) of the X-type link 8 is pivotally attached to the base 7 and the cover plate 4, and the other end is slid on the base 7 or the lower surface of the cover plate 4. . The support columns 9 are arranged one by one in the front and rear of the figure, and are provided at a total of four locations. The lower end is pivotally mounted on the base 7 so as to be rotatable in the horizontal direction in the figure, and the upper end rotates in the horizontal direction in the same manner as the cover plate 4. It is pivotally attached as possible.
[0011]
And the connection piece 12 for connecting the 1st cylinder 10 to the side part of the lower support | pillar 9b of the support | pillar 9 of the right side of illustration is affixed, and the front-end | tip of the 1st cylinder 10 is connected. The base of the first cylinder 10 is connected to the base 7, and the lower column 9 b is raised or tilted through the connecting piece 12 by the expansion and contraction of the first cylinder 10, and the column 9 is raised or bent and tilted. Yes.
Further, the bending shafts 9a of the left and right support columns 9 and 9 are connected to each other by a tuning rod 13, and are configured to be interlocked with each other. Yes.
In this way, the four cylinders 9 are erected and bent and tilted in conjunction with the expansion and contraction of the first cylinder 10, and the cover plate 4 is translated in the vertical direction by the action of the X-type link 8. As a result, the cover plate 4 moves up and down in the pit 3.
[0012]
The upper lift 2b includes an X-type link 15 that rises and falls in the vertical direction, and a second cylinder 16 that has a distal end connected to the cover plate 4 and a base end connected to an arm body of the X-type link 15. The vehicle-mounted base 1 provided on the X-type link 15 is moved up and down in parallel with the cover plate 4 by the action of the link 15.
The cover plate 4 and the vehicle-mounted base 1 are formed in substantially the same shape as the opening of the pit 3, and the lower lift 2a is configured so that the upper surface of the cover plate 4 is flush with the floor surface when the lift-up is completed. Has been.
[0013]
As described above, the lift elevating means 2 is provided with the cover plate 4 as a boundary. Therefore, the cover plate 4 does not need to be provided with an opening through which the elevating means is inserted, a projection or a recess for accommodating the elevating means, and the pit 3 can be formed so as to cover the entire surface of 3 without a gap, and the upper surface can be flattened. As a result, the cover plate can be raised as if the bottom surface of the pit is raised, and the entire pit can be satisfactorily closed even in the lift-up state where the vehicle-mounted base is raised.
[0014]
FIG. 2 is an explanatory diagram of a lift state from the lift-up state in which the vehicle-mounted base 1 of FIG. 1 is raised to the uppermost position until it is stored in the pit 3, and FIG. 2 (a) is a lower lift 2a in the middle. FIG. 2 (b) shows a state where the upper lift 2b is completely lowered while the lower lift 2a is raised, and FIG. 2 (c) shows a state where the upper lift 2b is lowered. ) Shows a state in which the lower lift 2a is also completely lowered to complete the lift-down.
Thus, even in the state in which the lift is stored, the pit 3 is closed by the vehicle-mounted base 1 formed in substantially the same shape as the pit 3 like the cover plate 4, and the lower lift and the upper lift are both linked mechanisms. Since it is formed, the lift raising / lowering means can be satisfactorily stored in the shallowly formed pit.
[0015]
FIG. 3 shows the hydraulic pressure for driving the pair of left and right first cylinders 10 and 10 and the pair of left and right second cylinders 16 and 16 of the lift formed by arranging the lift having the structure of FIG. 1 side by side as shown in the plan view of FIG. The circuit is shown. 4 and 5 show the operation flow. In this way, by arranging a pair on the left and right and separating the vehicle-mounted base on the left and right, a wide work space can be secured in the center in the front-rear direction.
As shown in FIG. 3, the lower lift 2 a and the upper lift 2 b are controlled by a first electromagnetic valve 18 and a second electromagnetic valve 19, respectively. Both electromagnetic valves 18, 19 are pumped from an oil tank 20 by a pump 21. Oil is supplied. The pair of first cylinders 10 and 10 and the pair of second cylinders 16 and 16 are connected in series, and the left and right lifts are configured to operate in conjunction with each other.
Reference numeral 22 denotes a third electromagnetic valve for controlling the lift lowering, and reference numeral 23 denotes a throttle valve. 4 and 5, LS1 indicates a limit switch that operates when the lower lift 2a is in the maximum upper limit state, and is installed in the first cylinder 10. LS2 indicates that the upper lift 2b is in the lowest limit state. The limit switch which operate | moves is shown and LS2 is mounted | worn with the 2nd cylinder 16. FIG. Moreover, in FIG. 7, 26 has shown the vehicle mounted on the vehicle-mounted base.
[0016]
Next, the operation procedure of these electromagnetic valves will be described. First, as shown in FIG. 4, the lift is raised by pressing a lift raising button of a separate operation unit (not shown) (S1). At this time, it is determined whether or not the first limit switch LS1 is in the operating state (S2). If it is in the operating state (if the lower lift 2a is in the upper limit position), the process proceeds to S3 and the second electromagnetic valve 19 (SOL2 ). If not, the process proceeds to S5 to activate the first electromagnetic valve 18 (SOL1). If the 1st electromagnetic valve 18 or the 2nd electromagnetic valve 19 act | operates, it will progress to S4 or S6, the pump 21 will act | operate, and the oil of the oil tank 20 will be supplied to the 1st cylinder 10 and the 2nd cylinder 16.
Thus, when the lift is lifted and the lift is stored in the pit 3, the lower lift 2a is actuated by the first lift raising operation to raise the cover plate 4, and the second lift raising operation. Then, the upper lift 2b is activated and the vehicle-mounted base 1 is lifted up to the uppermost position.
[0017]
To lower the lift, as shown in FIG. 5, the lift lowering button of the operation unit is pushed (S11). At this time, if the second limit switch LS2 is in the operating state (if the upper lift 2b is in the lower limit state), the process proceeds to S13 and the first electromagnetic valve 18 is operated. If not, the process proceeds to S15 to activate the second electromagnetic valve 19. If the 1st electromagnetic valve 18 or the 2nd electromagnetic valve 19 act | operates, it will progress to S14 or S16, the 3rd electromagnetic valve 22 (SOL3) will act | operate, and the oil in the 1st cylinder 10 and the 2nd cylinder 16 will be sent to the oil tank 20. Recover operation.
In this way, when the lowering operation of the lift is performed and the lower lift 2a and the upper lift 2b are in the ascending state, the upper lift 2b is actuated by the first lift lowering operation to lower the in-vehicle stand 1 and the second lift lowering operation. Then, the lower lift 2a is operated, and the lift is lowered to the lowest position and stored in the pit 3.
[0018]
Thus, since the lift raising / lowering means is provided in two upper and lower stages, the cover plate 4 is first lifted during the lift-up operation, and the cover plate 4 is lowered after the upper lifting / lowering means is lowered during the lift-down operation. Thus, in addition to the lifted-up state, the pit 3 can be closed during the lifting operation, and the pit 3 can be closed at all times. For this reason, tools and parts do not inadvertently enter the pit, and the operator does not slide their feet into the pit.
Note that both the lift-up operation and the lift-down operation may be performed with a single button operation.
[0019]
FIG. 6 is an explanatory side view showing another example of the lift according to the present invention, and the configuration of the lower lift 2a is different from the embodiment of FIG. In addition, the same code | symbol is provided to the structural member similar to FIG. 1, and description is abbreviate | omitted. The lower lift 2a employs a structure in which a pair of X-type links 8 are provided in the left-right direction as shown in the figure, and each is driven by a cylinder 25 to expand and contract. In this case, more cylinders are required as compared with the embodiment shown in FIG. 1, but the structure can be simplified.
[0020]
In addition, as shown in FIG. 7, the said lift was formed in the front and back long, and showed the form used by providing a pair in parallel, but the left and right lifts are integrally formed to form the in-vehicle stand with a single plate. You may do it. In this case, by providing an opening for work in the center, vehicle maintenance can be easily performed from below as in the case of a pair arranged in parallel.
In addition, when a pair is provided in parallel, the left and right lifts may be linked and interlocked, but in that case, a pit for storing the beam is required and the configuration becomes complicated, so the hydraulic circuit It is desirable to have a structure that links
Further, although the link mechanism of the upper lift is an X-type link, other link mechanisms such as a λ (lambda) type link can also be used. Further, the lower lift is not a link mechanism, and for example, a cylinder may be erected vertically. If the upper lift is configured by a link mechanism, a pit can be formed shallowly.
[0021]
【The invention's effect】
As described above in detail, according to the present invention, since the lift raising / lowering means are respectively provided up and down, the cover plate can be raised as if the bottom surface of the pit is raised by the action of the lower raising / lowering means. Even in the lifted up state, the entire pit can be satisfactorily closed.
Also, when the lift-up operation is performed, the cover plate is first raised, and when the lift-down operation is performed, the cover plate is lowered after the upper elevating means is lowered. And parts do not enter the pit, and workers do not slide their feet into the pit.
[Brief description of the drawings]
FIG. 1 is a side view illustrating a state in which a vehicle maintenance lift according to the present invention is raised.
2 shows another state of the vehicle maintenance lift shown in FIG. 1, where (a) is a state in the middle of lowering the upper lift, (b) is a state in which the upper lift is completely lowered, and (c) is an upper lift. In addition, the lower lift is also lowered.
FIG. 3 is a hydraulic circuit diagram of the lift shown in FIG. 1;
4 is a lift-up operation flowchart of the hydraulic circuit of FIG. 3;
FIG. 5 is a lift-down operation flowchart of the hydraulic circuit of FIG. 3;
FIG. 6 is a side explanatory view of a vehicle maintenance lift showing another example of the present invention.
7 is a plan view of the vehicle maintenance lift of FIG. 1. FIG.
[Explanation of symbols]
1 .. On-vehicle stand, 2.. Lift lifting means, 2 a.. Lower lift as lower lifting means, 2 b.. Upper lift as upper lifting means, 3, pit, 4, cover plate, 5, floor , 8 ・ ・ X type link, 15 ・ ・ X type link.

Claims (2)

The vehicle lift is moved up and down by lift lifting means provided below, and the lift lifting lift is placed in a pit recessed in the floor so that the mounting surface of the vehicle mounting is substantially flush with the floor when lowered. In the lift for storing vehicle maintenance,
The lift elevating means is formed of two stages of upper and lower means composed of a lower elevating means elevating and lowering in the pit and an upper elevating means extending and contracting vertically,
A cover plate for closing the pit is provided above the lower lifting means,
The vehicle base was placed thereon with placing the upper lifting means to the cover plate,
When raising the vehicle mount, the lower lift means is raised, and then the upper lift means is raised, while when lowering the vehicle mount, the upper lift means is lowered. Then, by lowering the lower lifting means,
The cover plate, the vehicle platform vehicle maintenance lift characterized that you close the normally pit opening surface during vertical movement of the.   The vehicle mounting base, the lift lifting means, the pit, and the cover plate are all arranged in a pair on the left and right, and the lifting movement is interlocked, and the left and right wheels of the vehicle are placed on each of the pair of left and right mounting bases to move up and down. The lift for vehicle maintenance described.

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