JP2020179975A - Lifting device for vehicle - Google Patents

Abstract

To provide a lifting device for a vehicle capable of surely closing an opening in a relatively large pit, which can move a rising/falling link device and a vehicle support stand to the inside/outside of the pit when lifting down the vehicle support stand while realizing miniaturization of the vehicle support stand of each lifting device.SOLUTION: In a lifting device 100 for a vehicle, each lifting device 20 includes each movable pit cover 50 which is mounted on a configuration link of a rising/falling link device 30 to move together with the rising/falling motion of the rising/falling link device 30. The movable pit cover 50 of each lifting device 20 closes a sub-opening part 11B, which is the other part of openings 11 of a pit 10 which is not closed with a vehicle support stand 40 when the vehicle support stand 40 is located at the side of a lift-down position. In the process where the vehicle support stand 40 is lifted from the lift-down position, the sub-opening part 11B of the pit 10 is opened such that the rising/falling link device 30 can be moved to the outside of the pit 10 from the sub-opening part 11B and a main opening part 11A.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle lift device.

Conventionally, as a vehicle lift device, as described in Patent Document 1, a pit is provided in a maintenance work area defined on the floor surface of a maintenance site, and a pair of lifting devices are housed inside the pit, and each lifting device is used. Some devices have an undulating link device composed of a plurality of links, and a vehicle support base (for example, a lift table) for supporting the vehicle is mounted on the upper part of the undulating link device.

In the vehicle lift device described in Patent Document 1, each lifting device allows the undulating link device and the vehicle support base to be moved inside and outside the pit through a pit opening provided at the same level as the floor surface of the maintenance site. The vehicle support base is positioned at the opening of the pit so that it can be raised and lowered between the lift-down position that closes the main opening and the lift-up position that positions the vehicle support base above the pit.

Japanese Unexamined Patent Publication No. 2016-130150

Each lifting device in the vehicle lifting device described in Patent Document 1 has a pit opening having a relatively large opening area for moving the undulating link device and the vehicle support base into and out of the pit at the lift-down position. Since it is closed by the positioned vehicle support, the flat area of the vehicle support becomes large. This means that the vehicle support base that supports the vehicle at the time of lift-up covers a part of the range including the maintenance work area where the engine, undercarriage, mission, battery, etc. are arranged on the underside of the vehicle, or its proximity range. It means that it will be covered from below, which may impair maintenance workability.

It should be noted that the vehicle support base located at the lift-up position reduces the area covering the lower surface of the vehicle to improve maintenance workability, or the vehicle support base is intended to reduce the weight and size of the vehicle lift device. When trying to miniaturize the pit, the small work support located in the lift-down position makes it difficult to completely close the relatively large opening of the pit as described above, and for the walking surface for workers and for vehicles. It causes the inconvenience that the approach road surface cannot be completed.

An object of the present invention is to provide a relatively large pit opening that allows the undulating link device and the vehicle support to be moved inside and outside the pit while reducing the size of the vehicle support of each lifting device in the vehicle lift device. The purpose is to make it possible to reliably close the vehicle support base when it is lifted down.

In the invention according to claim 1, a pit is provided in a maintenance work area defined on the floor surface of the maintenance site, and a pair of elevating devices are housed inside the pit, and each elevating device comprises a plurality of links. It has an undulating link device, and a vehicle support base for supporting the vehicle is mounted on the upper part of the undulating link device, and each elevating device is provided with the undulating link device and the vehicle support base at the same level as the floor surface of the maintenance site. A lift-down position that allows the vehicle support to be moved inside and outside the pit through the opening of the pit, positions the vehicle support base at the main opening that is a part of the pit opening, and closes the main opening, and the vehicle support base is placed in the pit. It is a vehicle lift device that can be lifted and lowered from the lift-up position positioned above the undulating link device, and each lifting device is attached to the constituent link of the undulating link device so that it can accompany the undulating operation of the undulating link device. The movable pit cover of each elevating device has each movable pit cover, and the movable pit cover of each lifting device is another one of the pit openings that are not blocked by the vehicle support when the vehicle support is positioned on the side of the lift-down position. In the process of closing the sub-opening which is a part and raising the vehicle support from the lift-down position, the sub-opening of the pit can be opened and the undulating link device can be moved out of the pit from the sub-opening and the main opening. It is intended to be.

The invention according to claim 2 further makes it possible to swivel the swivel arm that enables the vehicle support base of each elevating device to enter the vehicle maintenance work area and lift the lower surface of the stopped vehicle in the invention according to claim 1. Each lifting device has a lift standby stage in which the vehicle support is positioned in the lift-down position, and the vehicle support is started to rise from the lift-down position, and the swivel arm is swiveled with respect to the lower surface of the vehicle at a level above the opening of the pit. The movable pit cover is maintained at the opening level of the pit without accompanying the undulating operation of the undulating link device, and each lifting device raises the vehicle support base from the above-mentioned initial stage of the lift. The movable pit cover is attached to the constituent link of the undulating link device so that the movable pit cover accompanies the undulating operation of the undulating link device with a certain amount of delay at the stage of causing the undulating link device. ..

In the invention according to claim 3, further, in the invention according to claim 2, the movable pit cover of each elevating device is attached to the constituent link of the undulating link device via the elongated hole portion, and the elongated hole of the elongated hole portion is attached. It is made to be movable relative to the constituent link in the range of.

The invention according to claim 4 is the invention according to any one of claims 1 to 3, further, each of the elevating devices has a movable plate attached to the movable plate, and the movable pit cover of each elevating device is a sub of the pit. Inside the pit, which is set to a pit closing position that closes at least a part of the sub-opening when separated upward from the opening, and is housed inside the pit when the movable pit cover closes the sub-opening of the pit. It is set to the storage position.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, further, when the vehicle support base of each elevating device is positioned at the lift-up position, the movable pit cover of each elevating device is pitted. It is configured to be separated from the opening level of.

The invention according to claim 6 is the invention according to any one of claims 1 to 5, further, each of the elevating devices pivotally supports the lower end portion of the first link to a rotary support portion provided on a gantry inside the pit. Then, the lower end of the second link is slidably supported on the sliding support provided on the gantry inside the pit, the upper end of the first link is pivotally attached to the intermediate link together with the second link, and the upper end of the second link is attached. The part is pivotally attached to the vehicle support, both ends of the first sublink are pivotally attached to the gantry and the intermediate link, and the parallelogram link mechanism is provided by the four sections of the first link, the first sublink, the gantry and the intermediate link. The two ends of the second sublink are pivotally attached to the vehicle support base and the intermediate link, and a parallelogram link mechanism is formed by the four sections of the second link, the second sublink, the vehicle support base, and the intermediate link. The movable pit cover is attached to the second sub-link.

(Claim 1)
(a) Each elevating device has each movable pit cover attached to the configuration link of the undulating link device so as to accompany the undulating link device, and each movable pit cover has a vehicle support base in a lift-down position. When positioned to the side, it closes the sub-opening, which is another part of the pit opening that is not blocked by the vehicle support. Therefore, in order to reduce the area where the vehicle support base positioned at the lift-up position covers the lower surface of the vehicle to improve maintenance workability, or to realize weight reduction and compactness of the vehicle lift device, the vehicle support base is used. When the vehicle support is positioned on the lift-down position side while trying to reduce the size of the pit, the movable pit cover that closes the sub-opening of the pit, together with the vehicle support that closes the main opening of the pit, Almost all the openings of the pit including the main opening and the sub-opening are closed to form a walking surface for workers, and an approach road surface for a vehicle to be maintained is formed to make the vehicle a maintenance work area. Can be entered.

Further, in the process of raising each vehicle support from the lift-down position, the sub-opening of the pit is opened by each movable pit cover, and the undulating link device is opened by the relatively large opening of the pit including the sub-opening and the main opening. To be movable inside and outside the pit.

(Claim 2)
(b) Each elevating device is equipped with a swivel arm that allows the vehicle support of each elevating device to enter the vehicle maintenance work area and lift the underside of the stopped vehicle, and each elevating device positions the vehicle support in the lift-down position. A movable pit cover is provided between the lift standby stage and the initial lift stage where the vehicle support is started to rise from the lift-down position and the swivel arm can be swiveled with respect to the underside of the vehicle at a level above the pit opening. The movable pit cover moves the undulating link device at the stage where the pit opening level is maintained without accompanying the undulating operation of the undulating link device and each lifting device raises the vehicle support base from the initial stage of the lift. The movable pit cover is attached to the constituent link of the undulating link device so as to accompany it with a delay of a certain amount. As a result, each lifting device maintains the movable pit cover at the opening level of the pit at the initial stage of the lift, and supports the vehicle while forming the approach road surface of (a) above for the vehicle to be maintained by the movable pit cover. The swivel arm of the platform can be raised to a level above the opening of the pit to set the swivel level with respect to the underside of the vehicle. This means that each time multiple vehicles are continuously placed in the maintenance work area and the maintenance work is repeated, the vehicle support base is moved from the lift-up position for the previous vehicle to the lift-down position in the lift standby stage. If the above swing arm is lowered to a swivel level without lowering to, the previous vehicle can be removed from the maintenance work area, and then the next vehicle can be entered into the maintenance work area. It will be possible to improve productivity.

(Claim 3)
(c) The movable pit cover of each elevating device is attached to the constituent link of the undulating link device via the elongated hole portion, and is movable relative to the constituent link within the range of the elongated hole of the elongated hole portion. By doing so, the relative movement structure of the movable pit cover with respect to the constituent links of the undulating link device can be easily realized.

(Claim 4)
(d) Each elevating device has a movable plate attached, and the movable plate closes at least a part of the sub-opening when the movable pit cover of each elevating device is separated upward from the sub-opening of the pit. It is set to the pit closing position. As a result, when the vehicle support base rises from the lift-down position, the sub-opening of the pit that allows the undulating link device to move out of the pit is closed by a movable plate, and the operator can move the undulating link device onto the movable plate. Work floor surface can be formed.

(Claim 5)
(e) When the vehicle support of each lifting device is positioned in the lift-up position, the movable pit cover of each lifting device is configured to be separated from the opening level of the pit. Therefore, during maintenance work in which the vehicle support base is raised to the lift-up position, a large maintenance work space that is not obstructed by the movable pit cover can be secured directly under the vehicle to be lifted.

(Claim 6)
(f) Each elevating device pivotally supports the lower end of the first link on the rotary support provided on the pedestal inside the pit, and the lower end of the second link on the sliding support provided on the pedestal inside the pit. The upper end of the first link is pivotally attached to the intermediate link together with the second link, the upper end of the second link is pivotally attached to the vehicle support, and the first sub-link is attached to the gantry and the intermediate link. Both ends are pivotally attached to form a parallelogram link mechanism by the four sections of the first link, the first sublink, the gantry, and the intermediate link, and both ends of the second sublink are pivoted to the vehicle support base and the intermediate link. When configured to form a parallelogram link mechanism by the four sections of the second link, the second sublink, the vehicle support, and the intermediate link, the movable pit of (a) above is attached to the second sublink. A cover can be attached.

FIG. 1 is a perspective view showing a vehicle lift device according to an embodiment of the present invention. FIG. 2 is a front view showing a vehicle lift device. FIG. 3 is a side view showing a vehicle lift device. FIG. 4 is a plan view showing a vehicle lift device. 5A and 5B show changes in the lift state of the undulating link device, where FIG. 5A is a lift-up state, FIG. 5B is a lift intermediate state, and FIG. 5C is a front view showing a lift initial stage state. 6A and 6B show the configuration links of the undulating link device shown in FIG. 5, in which FIG. 6A is a lift-up state, FIG. 6B is a lift intermediate state, and FIG. 6C is a schematic view showing a lift initial stage state. 7A and 7B show a movable pit cover attached to the configuration link of the undulating link device, where FIG. 7A is a plan view, FIG. 7B is a front view, and FIG. 7C is a side view. FIG. 8 is an enlarged plan view showing part VIII of FIG. 7. FIG. 9 is a front view showing a movable plate set at the pit closing position. FIG. 10 is a front view showing a movable plate set at an intermediate position. FIG. 11 is a front view showing a movable plate set at the storage position in the pit. FIG. 12 is a perspective view showing a lift-down state in which each lifting device of the vehicle lift device is positioned in the lift standby stage. FIG. 13 is a perspective view showing an initial lift state in which each lifting device of the vehicle lift device is positioned at the initial stage of the lift. FIG. 14 is a perspective view showing a turning state of the turning arm in each lifting device of the vehicle lift device. FIG. 15 is a perspective view showing a movable pit cover associated with the undulating link device in each lifting device of the vehicle lift device. FIG. 16 is a perspective view showing a lift intermediate state in which each lifting device of the vehicle lift device is positioned at the lift intermediate position. FIG. 17 is a perspective view showing a lift-up state in which each lifting device of the vehicle lift device is positioned at the lift-up position. FIG. 18 shows the configuration of each lifting device in the vehicle lift device, (A) is a schematic plan view showing a vehicle approach process, (B) is a schematic front view showing a lift-up state, and (C) is a lift intermediate state. It is a schematic front view which shows. 19A and 19B show the configuration of each lifting device in the conventional vehicle lift device, FIG. 19A is a schematic plan view showing a vehicle approach process, FIG. 19B is a schematic plan view showing a vehicle approach stop state, and FIG. It is a schematic front view which shows the lift-up state. 20A and 20B show a vehicle lift device, FIG. 20A is a side view showing a lift-up state of the present invention, FIG. 20B is a side view showing a lift-up state of the conventional example, and FIG. 20C is an intermediate lift of the conventional example. It is a side view which shows the state. 21A and 21B show pits of a vehicle lift device, FIG. 21A is a schematic plan view showing pits of the present invention, FIG. 21B is a schematic plan view showing pits of a conventional example, and FIG. 21C is a schematic plan view of another conventional example. It is a schematic plan view which shows a pit. FIG. 22 is a front view showing a modified example of the vehicle lift device. FIG. 23 is a front view showing another modification of the vehicle lift device. FIG. 24 shows a modified example of the undulating link device, (A) is a schematic view showing a lift-up state, and (B) is a schematic view showing a lift intermediate state. 25A and 25B show other modified examples of the undulating link device, FIG. 25A is a schematic view showing a lift-up state, and FIG. 25B is a schematic view showing a lift intermediate state. FIG. 26 shows a modified example of the lift device for a vehicle, (A) is a perspective view showing a lift-up state, (B) is a perspective view showing a lift initial stage state, and (C) is a perspective view showing a lift-down state. is there. FIG. 27 shows another modification of the vehicle lift device, (A) is a perspective view showing a lift-up state, (B) is a perspective view showing a lift initial stage state, and (C) is a perspective view showing a lift-down state. It is a figure.

As shown in FIGS. 1 to 4, the vehicle lift device 100 has an approach direction X (vehicle longitudinal direction) of the vehicle 1 (vehicle longitudinal direction) (FIGS. 1 and 12 to 12) in the maintenance work area where the vehicle 1 enters and stops at the maintenance site. A pair of left and right lifting devices 20 are provided on both sides of the left-right direction Y (vehicle width direction) (FIGS. 1, 12 to 17) orthogonal to FIG. 17).

In the present embodiment, the pit 10 (FIG. 2) is recessed in the maintenance work area defined on the floor surface of the maintenance site, and the pair of elevating devices 20 are housed inside the pit 10.

Each elevating device 20 has an undulating link device 30 composed of a plurality of links, and a vehicle support base 40 (lift table 41 and front and rear swivel arms 42, 42) for supporting the vehicle is mounted on the undulating link device 30. And prepare. Specifically, each vehicle support base 40 has a lift table 41 provided above the undulating link device 30, and turns back and forth so that the lower surface of the stopped vehicle 1 can be lifted after entering the vehicle maintenance work area. Arms 42 are provided at both front and rear ends of the lift table 41 so as to be rotatable.

Each elevating device 20 is operated by the elevating actuator (elevating cylinder device in this embodiment) 21 through the opening 11 of the pit 10 in which the undulating link device 30 and the vehicle support base 40 are provided at the same level as the floor surface of the maintenance site. It is possible to move inside and outside the pit 10. The undulating link device 30 of each elevating device 20 positions the vehicle support base 40 at each of the left and right main openings 11A (FIG. 1) which is a part of the opening 11 of the pit 10, and lifts down the main opening 11A. And the lift-up position where the vehicle support base 40 is positioned above the pit 10 can be raised and lowered.

Here, the undulating link device 30 of each elevating device 20 is made along the left-right direction Y in which the displacement of each link is orthogonal to the approach direction X of the vehicle 1. Further, the undulating link device 30 of each elevating device 20 maintains the vehicle support base 40 in a horizontal state and elevates and elevates only in the vertical direction.

The undulating link device 30 of each elevating device 20 is arranged on the gantry 12 inside the pit 10 on one side (outer side) of the pit 10 along the left-right direction Y orthogonal to the approach direction X of the vehicle 1. On the first link 31 pivotally supported by the rotary support portion 13 and the gantry 12 inside the pit 10, one side (outside) of the pit 10 along the left-right direction orthogonal to the approach direction X of the vehicle 1. ) To the sliding (rolling is also possible) support portion 14 arranged along the other side (inside), the second link 32 has at least two links.

In the present embodiment, as shown in FIGS. 5 and 6, each elevating device 20 pivotally supports the lower end a of the first link 31 on the rotation support portion 13 provided on the gantry 12 inside the pit 10, and pits. The lower end portion a of the second link 32 having a length of 2 × L1 that is twice the length L1 of the first link 31 is slidably supported on the sliding support portion 14 provided on the gantry 12 inside the 10 and the first link. The upper end b of the 31 is pivotally attached to the intermediate link 33 together with the midpoint of the second link 32 (the central part of the length of the second link 32) c, and the upper end b of the second link 32 is the vehicle support 40 (lift). It is pivotally attached to the table 41). Further, each elevating device 20 pivotally attaches both ends a and b of the first sub-link 31S having the same length as the first link 31 to the gantry 12 and the intermediate link 33, and the first link 31 and the first sub The parallelogram link mechanism 20A is formed by the four sections of the link 31S, the gantry 12, and the intermediate link 33. Further, each lifting device 20 pivotally attaches both ends a and b of the second sub-link 32S, which is half the length of the second link 32, to the vehicle support base 40 (lift table 41) and the intermediate link 33. The parallelogram link mechanism 20B is formed by the four sections of the two links 32, the second sublink 32S, the vehicle support base 40 (lift table 41), and the intermediate link 33. Then, each elevating device 20 is supposed to attach a movable pit cover 50, which will be described later, to the second sublink 32S.

In each elevating device 20, the cylinder base end of the elevating cylinder device constituting the elevating actuator 21 is pivotally attached to the gantry 12, and the piston rod tip of the elevating cylinder device is pivotally supported at the intermediate portion of the second link 32. It is supposed to be done.

Further, in each elevating device 20, as shown in FIGS. 1 and 21, each of the links 31, 32, 31S, 32S, and 33 constituting the undulating link device 30 has two linkers (link plate or link). Bar) (For the first link 31, the pair of the two link plates 31P and 31P shown in FIG. 21 (A)) is connected (for the first link 31, the joint shown in FIG. 21 (A)). It is made up of an assembly connected by a material 31R), and each of the two linkers that make up each link in the left elevating device 20 and each of the two linkers that make up each link in the right elevating device 20. And are arranged so as to be staggered.

In the vehicle lift device 100, front and rear fixed pit covers 15 that are flush with the floor surface of the maintenance site are provided on both front and rear sides of the pit 10 along the approach direction X of the vehicle 1 (each fixed). Instead of providing the pit cover 15, the floor surface of the maintenance site may extend to both front and rear sides with respect to the pit 10). As a result, each elevating device 20 opens the undulating link device 30 and the vehicle support base 40 (lift table 41 and swivel arm 42) sandwiched between the front and rear fixed pit covers 15 in the pit 10 by the operation of the elevating actuator 21. The vehicle support base 40 is positioned at the opening 11 of the pit 10 so as to be movable inside and outside the pit 10 via 11 (the left and right main openings 11A and the central sub-opening 11B) to close the opening 11. A lift-down position (FIGS. 5 (C) and 6 (C)) flush with each of the front and rear fixed pit covers 15 and a lift-up position (FIG. 5 (A)) in which the vehicle support base 40 is positioned above the pit 10. , Fig. 6 (A)). 5 (B) and 6 (B) show the lift intermediate state.

At this time, each elevating device 20 has the two parallelogram link mechanisms 20A and 20B described above, and the lengths of the first link 31, the first sublink 31S and the second sublink 32S are set to L1 and the second By setting the length of the link 32 to 2 × L1, the vehicle support base 40 (lift table 41 and swivel arm 42) is maintained in a horizontal state as described above, and is vertically along the same vertical line V (FIG. 6). It will be possible to move up and down only in the direction.

Further, each elevating device 20 has each movable pit cover 50 attached to the constituent link of the undulating link device 30 so as to accompany the undulating operation of the undulating link device 30. The movable pit cover 50 of each lifting device 20 is provided when the vehicle support base 40 is positioned on the side of the pit down position and closes the main opening 11A which is a part of the opening 11 of the pit 10. The entire sub-opening 11B, which is the other part of the opening 11 of the pit 10 that is not blocked by (the central portion sandwiched between the left and right main openings 11A), is closed by two halves (FIG. 12). Further, the movable pit cover 50 of each lifting device 20 opens each half of the sub opening 11B of the pit 10 in the process of ascending the vehicle support base 40 from the lift-down position, and makes each undulating link 30 sub. It moves out of the pit 10 from each half of the opening 11B and the main opening 11A so that it can be separated upward.

Here, in the vehicle lift device 100, when the vehicle support base 40 of each lifting device 20 is positioned at the lift-up position, the movable pit cover 50 of each lifting device 20 starts from the opening level of the pit 10. It is configured to be separated upward.

In each elevating device 20, as shown in FIGS. 7 and 8, each movable pit cover 50 is provided with side plates 52 fixed to the lower front and rear sides of the flat plate-shaped cover plate 51, and the second sublink of each elevating device 20 is provided. It covers the assembly composed of the two link plates 32SP constituting the 32S and the connecting material 32SR thereof so as to be substantially parallel to the link plates 32SP so as to be relatively movable from above. Each movable pit cover 50 is provided on the left and right side plates 52 on a guide roller 55 pivotally supported by one left and right guide bolt 54 planted on a boss 53 provided on each of the front and rear link plates 32SP. The long hole portion 52K is slidably engaged. Reference numeral 56 denotes a guide washer interposed between the head portion 54A of the guide bolt 54 and the guide roller 55. The elongated hole portion 52K of the side plate 52 extends in a direction substantially orthogonal to the plate surface of the cover plate 51. As a result, the movable pit cover 50 is attached to the second sublink 32 of the undulating link device 30 via the elongated hole portion 52K, and is attached to the second sublink 32S within the range of the elongated hole of the elongated hole portion 52K. It is made relatively movable.

Since each movable pit cover 50 is attached to the guide roller 55 provided on the second sub-link 32S of the undulating link device 30 via the elongated hole portion 52K described above, the movable pit cover 50 is undulated by the undulating link device 30. It does not immediately accompany the operation, but delays the operation as follows. That is, each lifting device 20 starts ascending from the lift-down position in the lift standby stage (FIG. 12) in which the vehicle support base 40 is positioned in the lift-down position, and the swivel arm 42 is moved from the opening 11 of the pit 10. The movable pit cover 50 is brought to the opening level of the pit 10 without accompanying the undulating operation of the undulating link device 30 between the lift initial stage (FIG. 13) that enables turning with respect to the lower surface of the vehicle 1 at the upper level. To maintain. Then, at the stage where each lifting device 20 raises the vehicle support base 40 from the initial stage of the lift, the movable pit cover 50 is within the range of the elongated hole of the elongated hole portion 52K with respect to the undulating operation of the undulating link device 30. The movable pit cover 50 is attached to the second sub-link 32S of the undulating link device 30 via the elongated hole portion 52K so as to accompany the movable pit cover 50 with a delay of a corresponding fixed amount.

Specifically, each elevating device 20 operates the vehicle support base 40 and the movable pit cover 50 as follows by the undulating operation of the undulating link device 30 (FIGS. 9 to 11).

(1) The lifting actuator 21 of each lifting device 20 raises and lowers the undulating link device 30 on the lift-up side, and lifts the lift table 41 of the vehicle support base 40 to the lift-up position that exceeds 150 mm, for example, from the lift-down position. When the swivel arm 42 is positioned above the opening 11 of the pit 10 (upper surface level of each of the front and rear fixed pit covers 15) by more than 150 mm, as shown in FIGS. 9 and 10, the second sub of the undulating link device 30 The movable pit cover 50 attached to the guide roller 55 provided on the link 32S via the elongated hole portion 52K is such that the upper end portion of the elongated hole portion 52K is deposited in the guide roller 55 by the weight of the movable pit cover 5. Then, it is supported by the second sublink 32S and is lifted to the lift-up position side with the movement of the second sublink 32S based on the undulating operation of the undulating link device 30.

(2) When the elevating actuator 21 of each elevating device 20 causes the undulating link device 30 to lie down from the above (1) and positions the vehicle support base 40 at the initial lift stage of 150 mm from the lift-down position, the movable pit cover As shown in FIGS. 11 to 14, 50 corresponds to a stopper 12K such as a bolt provided on the rising portion of the gantry 12 and a stopper 63K provided on the elevating guide 63 for the movable plate 60 described later, and the cover plate 51 The upper surface is stopped at the opening level of the pit 10, in other words, at the floor surface position flush with the upper surface of each of the front and rear fixed pit covers 15. As a result, the movable pit cover 50 forms a walking surface for the operator and an approach road surface for the vehicle to be maintained together with the front and rear fixed pit covers 15.

At this time, the undulating link device 30 positions the vehicle support base 40 at the initial stage of the lift as described above, and as shown in FIGS. 13 and 14, the swivel arm 42 provided on the lift table 41 opens the opening 11 of the pit 10. The swivel arm 42 is set to an upper level by 150 mm above the above level so that the swivel arm 42 can swivel with respect to the lower surface of the lift target vehicle.

(3) When the elevating actuator 21 of each elevating device 20 causes the undulating link device 30 to lie down further than the above (2), the guide roller 55 provided on the second sublink 32S of the undulating link device 30 is the floor of the above (2). The movable pit cover 50 that is parked at the surface position is moved downward in the elongated hole portion 52K, and the vehicle support base 40 is set to the lift standby stage that is positioned at the lift-down position as shown in FIGS. 11 and 12. Become. At this time, the lift table 41 of the vehicle support base 40 is placed on a stopper 12L such as a bolt provided at the rising portion of the gantry 12 and stopped.

In each lifting device 20, when the lifting actuator 21 raises the undulating link device 30 from the lift-down state of the above (3) toward the lift-up side of the above (1), the vehicle support base 40 and the movable pit cover 50 are described above. It is displaced to the lift-up position side through the lift standby stage or the lift initial stage in the reverse procedure of (1) to (3).

Each elevating device 20 is provided with a movable plate 60. In the present embodiment, it is assumed that each of the left and right pair of elevating devices 20 has one movable plate 60 corresponding to each. However, one movable plate 60 which is common to each elevating device 20 may be provided.

The movable plate 60 is provided with at least a part of the sub-opening 11B (in the present embodiment, both movable pit covers 50) when the movable pit cover 50 of each elevating device 20 is separated upward from the sub-opening 11B of the pit 10. Each half of the corresponding sub-opening 11B) is closed and positioned at a pit closing position flush with each of the front and rear fixed pit covers 15, and a work floor surface is formed on the sub-opening 11B. Further, the movable plate 60 is positioned at a storage position in the pit to be stored inside the pit 10 when the movable pit cover 50 closes the sub opening 11B of the pit 10.

The movable plate 60 is configured as follows in the present embodiment.
That is, the movable plate 60 is mounted on the X-link device 70 provided inside the pit 10, and the elevating guide roller 62 fixed to the elevating frame 61 of the movable plate 60 is erected on the gantry 12. Guided by the guide 63, the vehicle moves up and down between the above-mentioned pit closing position (FIG. 9) and the pit storage position (FIG. 11).

The X-link device 70 has an X-shape in which the midpoints of the two links 71 and 72 are pin-connected, and the lower end of the link 71 is pivotally attached to the rotation support portion 73 provided on the gantry 12, and the upper end of the link 71 is formed. Is slidably supported by the elongated hole 74A of the sliding (rolling is also possible) support portion 74 provided on the elevating frame 61, and the lower end portion of the link 72 is provided on the gantry 12 for sliding (rolling is also possible) support. It is slidably supported by the elongated hole 75A of the portion 75, and the upper end portion of the link 72 is attracted to the rotary support portion 76 provided on the elevating frame 61. A tension spring 77 (omitted in FIG. 10) is stretched between the lower ends of the link 71 and the link 72, and a tension spring 78 (omitted in FIG. 10) is stretched between the upper ends of the link 71 and the link 72. The X-link device 70 is always provided with a spring force in the extension direction. The movable plate 60 is constantly urged in the upward direction by the spring force of the tension springs 77 and 78 acting in the extension direction of the X-link device 70, and one end of the elongated hole 75A in the sliding support portion 75 provided on the gantry 12. The portion stops the sliding end of the lower end portion of the link 72 in the extending direction of the X-link device 70. By adjusting the sliding end of the link 72 by the adjuster portion 75R of the sliding support portion 75, the X-link device 70 is positioned at the pit closing position with the rising end regulated.

An L-shaped lock arm 64 is pivotally supported on the pivot portion 64A provided on the gantry 12, and a roller 64B that contacts the lower surface of the movable plate 60 at the pit closing position is provided on the upper end portion 64B of the lock arm 64. There is. The lock arm 64 is located between a lock position where the roller 64B bites slightly to one side of the vertical line passing through the pivot portion 64A and an unlocked position where the roller 64B separates from the vertical line passing through the pivot portion 64B to the other side. It is made swingable.

The lock arm 64 is always urged in the swing direction toward the lock position by a tension spring 65 stretched between the lock arm 64 and the gantry 12, and is provided by a stopper bolt 65K provided on the gantry 12 so that the position can be adjusted. The swing limit is regulated and it is positioned at the lock position. At this time, the lock arm 64 stretches the lower surface of the movable plate 60 while being supported by the roller 64B at the locked position, and holds the movable plate 60 at the pit closing position.

The lock arm 64 is provided with an release arm 66 that switches the lock arm 64 between the lock position and the unlock position against the urging force of the tension spring 65. The release arm 66 is pivotally supported by a movable plate 60 at an intermediate portion, and is provided with rollers 66A and 66B at both ends, respectively. The release arm 66 always brings the roller 66A into contact with the slide surface 64S facing outward along the left-right direction of the pit 10 along the L-shaped longitudinal direction of the lock arm 64. On the other hand, a release plate 67 is provided on the first link 31 of the undulating link device 30. Then, when the release plate 67 of the first link 31, which descends with the prone operation of the undulating link device 30, comes into contact with the roller 66B of the release arm 66 and pushes down the roller 66B, the release arm 66 rotates in the unlocking direction. Then, while sliding the roller 66A along the slide surface 64S of the lock arm 64, the lock arm 64 is displaced so as to rise from the lock position side to the unlock position side, and the lock arm 64 is locked. Position it in the release position. When the lock arm 64 is positioned at the unlocked position, the movable plate 60 loses the tension holding state by the lock arm 64 and can move up and down between the pit closing position and the pit storage position. That is, when the lock arm 64 is in the unlocked position, the pushing roller 68 provided in the intermediate link 33 of the undulating link device 30 pushes the upper surface of the movable plate 60 against the spring forces of the tension springs 77 and 78. As a result, the X-link device 70 is contracted so that the movable plate 60 can be pushed into the storage position in the pit.

When the movable plate 60 is pushed from the pit closing position to the side of the storage position in the pit, the upper end portion of the rising lock arm 64 positioned at the unlocking position and its roller 64B are provided on the movable plate 60. It is supposed that a certain opening / closing lid 60K (FIG. 1) is pushed open from below and protrudes outward from the opening window.

Further, the movable plate 60 of the present embodiment is provided with the main plate 60A attached to the upper portion of the elevating frame 61 toward the center along the left-right direction of the pit 10, and is hinged to the outer end of the main plate 60A. A copying plate 60B is provided. The movable plate 60 in the pit closed position positions the copying plate 60B on a horizontal plane flush with the main plate 60A. Then, as shown in FIG. 9, the movable plate 60 between the pit closing position and the storage position in the pit has a roller 60C provided on the copying plate 60B on a cam piece 60L provided on the first link 31 of the prone link device 30. The copying plate 60B is introduced between the first link 31 and the intermediate link 33 of the prone link device 30 which is set to be in a prone position by being imitated and swung.

Therefore, in each elevating device 20, the movable plate 60 is set between the pit closing position and the pit storage position as follows according to the elevating operation of the vehicle support base 40 and the movable pit cover 50 due to the undulating operation of the undulating link device 30. Go up and down between.

(1) The elevating actuator 21 of each elevating device 20 undulates the undulating link device 30 on the lift-up side, and the movable pit cover 50 accompanying the second sub-link 32S of the undulating link device 30 comes from the sub-opening 11B of the pit 10. When the pushing roller 68, which is separated upward and provided in the intermediate link 33 of the undulating link device 30, is located above the movable plate 60 away from the upper surface, the movable plate 60 is a tension spring as shown in FIG. It is mounted on the X-link device 70 located at the rising end by the spring force of 77 and 78, closes the sub-opening 11B of the pit 10, and is positioned at the rising position flush with the upper surface of each of the front and rear fixed pit covers 15. Set.

At this time, the movable plate 60 is supported from below by the lock arm 64 which is positioned at the lock position and is in a stretched state, is held at the above-mentioned pit closing position, and is flush with the front and rear fixed pit covers 15. Form the floor.

(2) The elevating actuator 21 of each elevating device 20 causes the undulating link device 30 to lie down from the above (1), and the release plate 67 provided on the first link 31 of the undulating link device 30 is placed on the lock arm 64 via the release arm 66. When is positioned at the unlocked position, as shown in FIG. 10, the movable plate 60 loses the tension holding state by the lock arm 64 and can move up and down between the pit closing position and the pit storage position.

At this time, the pushing roller 68 provided in the intermediate link 33 of the undulating link device 30 pushes the upper surface of the movable plate 60 against the spring force of the tension springs 77 and 78 to contract the X link device 70. The movable plate 60 can be pushed toward the storage position in the pit.

(3) The elevating actuator 21 of each elevating device 20 causes the undulating link device 30 to lie down further than in (2) above, and the movable pit cover 50 is a floor flush with the upper surface of each of the front and rear fixed pit covers 15 as described above. When the vehicle support base 40 is positioned at the surface position and further at the lift-down position flush with the upper surface of each of the front and rear fixed pit covers 15 as described above, the undulating link device 30 is positioned as shown in FIG. The X-link device 70 is contracted to the contracted end by the pushing roller 68 provided in the intermediate link 33, and the movable plate 60 is pushed and held to the storage position in the pit.

When the elevating actuator 21 of each elevating device 20 erects the undulating link device 30 from the lift-down state of the above-mentioned (3) toward the lift-up side of the above-mentioned (1), the movable plate 60 has the above-mentioned (1) to (3). In the reverse procedure, it rises from the storage position in the pit and is set to the pit closing position.

The vehicle lift device 100 generally lifts as follows.
(1) When the lifting actuator 21 of each lifting device 20 positions the vehicle support base 40 in the lift-down position (lift standby stage) by the undulating link device 30, the vehicle support base 40 is in the pit 10 as shown in FIG. The left and right main openings 11A are closed.

At the same time, as shown in FIG. 12, the movable pit cover 50 of each elevating device 20 closes each half of the sub-opening 11B, which is the central portion sandwiched between the main openings 11A of the pit 10.

As a result, the vehicle support base 40 and the movable pit cover 50 of each lifting device 20 are positioned at the floor surface position flush with the front and rear fixed pit covers 15, and the front and rear fixed pit covers 15 are located in the maintenance work area. At the same time, it will be flush with the floor of the maintenance site, forming a walking surface for workers and an approach road surface for vehicles to be maintained. The vehicle to be maintained enters the maintenance work area and is stopped.
At this time, the movable plate 60 is positioned at the storage position in the pit.

(2) When the lifting actuator 21 of each lifting device 20 positions the vehicle support base 40 at the lift initial stage exceeding 150 mm, for example, from the lift-down position (lift stage) of the above-mentioned (1) by the undulating link device 30, FIG. As shown in FIG. 14, the vehicle support base 40 makes the swivel arm 42 swivel with respect to the lower surface of the vehicle to be lifted, and the swivel arm 42 is positioned at the lift point on the lower surface of the vehicle to be maintained.

At this time, the movable pit cover 50 is kept at the floor surface position flush with each of the front and rear fixed pit covers 15, and the walking surface for the worker and the approach road surface for the vehicle to be maintained formed in (1) above. To maintain.

(3) The lifting actuator 21 of each lifting device 20 raises the vehicle support base 40 to the lift-up position side from the lift initial stage of the above-mentioned (2) by the undulating link device 30, and the swivel arm of the vehicle support base 40. When the 42 lifts the vehicle through the lift point of the vehicle to be maintained, the movable pit cover 50 accompanies the movement of the second sublink 32S of the undulating link device 30 as shown in FIGS. It is lifted to the side of the lift-up position below the pit 10 and is separated upward from the opening level (sub-opening 11B) of the pit 10.

(4) When the lifting actuator 21 of each lifting device 20 raises the vehicle support base 40 further to the lift-up position side than the above-mentioned (3) by the undulating link device 30, the movable plate 60 is pitted as shown in FIG. It rises from the internal storage position and is positioned at the pit closing position. The movable plate 60 closes at least a part of the sub-opening 11B in the pit 10 separated by the movable pit cover 50, and forms a work floor surface on the sub-opening 11B.

As a result, the operator maintains the maintenance target vehicle positioned in the lift-up position by the vehicle support base 40 on the work floor surface formed by the front and rear fixed pit covers 15 and the above-mentioned movable plates 60 from below. to enable.

In each lifting device 20, when the lifting actuator 21 lays down the undulating link device 30 from the lift-up state of (4) above to the lift-down position (lift stage) of (1) above, the vehicle support base 40 and the movable pit The cover 50 and the movable plate 60 are displaced from the lift-up position to the lift-down position (lift standby stage) through the lift initial stage in the reverse procedure of (1) to (4) above.

In the vehicle lift device 100, when the vehicle support base 40 of each lifting device 20 is positioned at the lift-up position as shown in FIG. 2, the cover plate of the movable pit cover 50 in each lifting device 20. Reference numeral 51 denotes a wall surface 51P for maintenance work, and a work instruction or the like can be attached to the wall surface 51P.

Further, in the vehicle lift device 100, the workbench 51A and the parts box 51B as shown in FIG. 22 are attached to and detached from the surface of the wall surface 51P for maintenance work on the cover plate 51 of the movable pit cover 50 of each lifting device 20. It may be possible, or a part of the cover plate 51 may be cut out and inverted as shown in FIG. 23, and this may be used as the workbench 51C.

Further, as shown in FIG. 24 or 25, each lifting device 20 includes a gantry 12, a first link 31, a second link 32, a first sub-link 31S, a second sub-link 32S, an intermediate link 33, and a vehicle support pedestal 40. The links of the seven sections are displaced along the left-right direction orthogonal to the approach direction of the vehicle 1, and the vehicle support base 40 is maintained in a horizontal state in the vertical direction. It may constitute the undulating link device 30 which can be raised and lowered only in the direction.

The undulating link device 30 of each elevating device 20 shown in FIGS. 24 and 25 pivotally supports the lower end a of the first link 31 on the rotation support portion 13 provided on the gantry 12, and slides on the gantry 12. The lower end portion a of the second link 32 having a length of 2 × L1 that is twice the length L1 of the first link 31 is slidably supported on the support portion 14, and the upper end portion b of the first link 31 is supported by the second link 32. It is pivotally attached to the intermediate link 33 together with the midpoint c, and the upper end portion b of the second link 32 is pivotally attached to the vehicle support base 40 (lift table 41). Further, each elevating device 20 pivotally attaches both ends a and b of the first sub-link 31S having the same length as the first link 31 to the gantry 12 and the intermediate link 33, and the first link 31 and the first sub The parallelogram link mechanism 20A is formed by the four sections of the link 31S, the gantry 12, and the intermediate link 33. Further, each lifting device 20 pivotally attaches both ends a and b of the second sub-link 32S, which is half the length of the second link 32, to the vehicle support base 40 (lift table 41) and the intermediate link 33. The parallelogram link mechanism 20B is formed by the four sections of the two links 32, the second sublink 32S, the vehicle support base 40 (lift table 41), and the intermediate link 33. At this time, the upper end portion of the first sub-link 31S and the lower end portion b of the second sub-link 32S are both pivotally attached to the intermediate link 33 at the same point. Then, the distance L2 between both lower end portions a of the first link 31 and the first sub-link 31S, the upper end portion b of the first link 31 (or the midpoint c of the second link 32), and the upper end portion of the first sub-link 31S. The distance L2 between b (or the lower end a of the second sub-link 32S) and the distance L2 between both upper ends b of the second link 32 and the second sub-link 32S are equal.

As a result, the undulating link device 30 of each elevating device 20 maintains the vehicle support base 40 in a horizontal state while the displacement of the constituent links thereof is made along the left-right direction orthogonal to the approach direction of the vehicle 1. It can be raised and lowered only in the vertical direction. 24 (A) and 25 (A) show a lift-up state, and FIGS. 24 (B) and 25 (B) show an intermediate lift state.

Further, as shown in FIG. 26, each elevating device 20 can be transformed into an elevating device 200 including a combination of X-link devices having two upper and lower stages.

The undulating link device 201 of each elevating device 200 is a combination of a lower link device 210 supported by the gantry 12 and an upper X link device 220 mounted on the lower link device 210 to support the vehicle support base 40. Consists of. The lower link device 210 has two links 211 and 212 pin-coupled in an X shape, and the lower end of the link 211 is pivotally supported by a rotation support 13 provided on the gantry 12, and the lower end of the link 212 is supported. The portion is slidably supported by the sliding support portion 14 provided on the gantry 12. The upper X-link device 220 has two links 221 and 222 pin-coupled in an X shape, the lower end of the link 221 is pivotally attached to the upper end of the link 211, and the lower end of the link 222 is attached. The vehicle support base 40 is pivotally attached to the upper end portion of the link 212, the vehicle support base 40 is pivotally supported on the upper end portion of the link 221 and the vehicle support base 40 is slidably supported on the upper end portion of the link 222.

The movable pit cover 50 is attached to each of the links 221, 222 of the upper X-link device 220 in the same manner as it is attached to the second sub-link 32S in the undulating link device 30.

As a result, the undulating link device 201 of each elevating device 200 makes the displacement of the constituent links along the left-right direction Y orthogonal to the approach direction X of the vehicle 1, and makes the vehicle support base 40 horizontal. It can be maintained and raised and lowered only in the extension direction. FIG. 26A shows a lift-up state, FIG. 26B shows a lift initial stage, and FIG. 26C shows a lift-down state (lift standby stage).

Therefore, according to the present embodiment, the following effects are obtained.
(a) Each elevating device 20 has each movable pit cover 50 attached to a second sub-link 32S which is a constituent link of the undulating link device 30 so as to accompany the undulating link device 30, and each movable pit. The cover 50 closes the sub-opening 11B, which is another part of the opening 11 of the pit 10 that is not blocked by the vehicle support 40 when the vehicle support 40 is positioned on the lift-down position side. Therefore, the vehicle support base 40 positioned at the lift-up position reduces the range covering the lower surface of the vehicle to improve maintenance workability, or the vehicle support device is supported in an attempt to reduce the weight and size of the vehicle lift device. When the vehicle support base 40 is positioned on the lift-down position side while reducing the size of the base 40, the movable pit cover 50 that closes the sub-opening 11B of the pit 10 closes the main opening 11A of the pit 10. Together with the vehicle support base 40, almost the entire opening 11 of the pit 10 including the main opening 11A and the sub-opening 11B of the pit 10 is closed to form a walking surface for workers, and for the vehicle to be maintained. The approach road surface can be formed to allow the vehicle to enter the maintenance work area.

Further, in the process of ascending each vehicle support base 40 from the lift-down position, the sub-opening 11B of the pit 10 is opened by each movable pit cover 50, and the undulating link device 30 includes the sub-opening 11B and the main opening 11A. It is made movable inside and outside the pit 10 through the relatively large opening 11 of the pit 10. At this time, the undulating link device 30 of each elevating device 20 does not require that the displacement of each link is made along the left-right direction Y orthogonal to the approach direction X of the vehicle 1, and the displacement of each link is the vehicle. It may be made along the direction along the approach direction X of 1.

That is, each elevating device 20 can be transformed into an elevating device 300 including a combination of X-link devices having two upper and lower stages, as shown in FIG. 27, for example.

The undulating link device 301 of each elevating device 300 is a combination of the lower link device 310 supported by the gantry 12 and the upper X link device 320 mounted on the lower link device 310 to support the vehicle support base 40. Consists of. The lower link device 310 has two links 311 and 312 pin-coupled in an X shape, and the lower end of the link 311 is pivotally supported by a rotation support 13 provided on the gantry 12, and the lower end of the link 312 is provided. The portion is slidably supported by the sliding support portion 14 provided on the gantry 12. The upper X-link device 320 has two links 321 and 322 pin-coupled in an X shape, the lower end of the link 321 is pivotally attached to the upper end of the link 311 and the lower end of the link 322 is attached. The vehicle support base 40 is pivotally attached to the upper end portion of the link 312, the vehicle support base 40 is pivotally supported on the upper end portion of the link 321 and the vehicle support base 40 is slidably supported on the upper end portion of the link 322.

The movable pit cover 50 is attached to each of the links 321 and 322 of the upper X-link device 320 in the same manner as the attachment to the second sub-link 32S in the undulating link device 30 of the first embodiment.

As a result, in the undulating link device 301 of each elevating device 300, the displacement of the constituent links thereof is made along the approach direction X of the vehicle 1. 27 (A) shows a lift-up state, FIG. 27 (B) shows a lift initial stage, and FIG. 27 (C) shows a lift-down state (lift standby stage).

(b) The vehicle support base 40 of each lifting device 20 is provided with a swivel arm 42 that can lift the lower surface of the stopped vehicle by entering the vehicle maintenance work area, and each lifting device 20 provides the vehicle support base 40. The lift standby stage positioned at the lift-down position and the initial lift stage where the vehicle support base 40 starts to rise from the lift-down position and the swivel arm 42 can swivel with respect to the lower surface of the vehicle at a level above the opening 11 of the pit 10. The movable pit cover 50 is maintained at the opening level of the pit 10 without accompanying the undulating operation of the undulating link device 30, and each lifting device 20 raises the vehicle support base 40 from the initial stage of the lift. At the stage, the movable pit cover 50 is attached to the constituent link of the undulating link device 30 so that the movable pit cover 50 accompanies the undulating operation of the undulating link device 30 with a certain amount of delay. As a result, each lifting device 20 maintains the movable pit cover 50 at the opening level of the pit 10 at the initial stage of the lift, and the movable pit cover 50 forms the approach road surface of the above-mentioned (a) for the vehicle to be maintained. However, the swivel arm 42 of the vehicle support base 40 can be raised to a level above the opening 11 of the pit 10 to set the swivel level with respect to the lower surface of the vehicle. This means that each time a plurality of vehicles are continuously put into the maintenance work area and the maintenance work is repeatedly performed, the vehicle support base 40 is moved from the lift-up position for the previous vehicle to the lift-down position in the lift standby stage. If the swivel arm 42 is lowered to a swivel level without being lowered to, the previous vehicle can be removed from the maintenance work area, and then the next vehicle can be entered into the maintenance work area for maintenance. It will improve work productivity.

(c) The movable pit cover 50 of each elevating device 20 is attached to the second sub-link 32S of the undulating link device 30 via the elongated hole portion 52K, and the second sub is within the range of the elongated hole of the elongated hole portion 52K. By making the movable pit cover movable relative to the link 32S, the relative movement structure of the movable pit cover 50 with respect to the second sublink 32S of the undulating link device 30 can be easily realized.

(d) Each elevating device 20 has a movable plate 60 attached thereto, and the movable plate 60 has the sub-opening when the movable pit cover 50 of each elevating device 20 is separated upward from the sub-opening 11B of the pit 10. It is set to a pit closing position that closes at least a part of the portion 11B. As a result, when the vehicle support base 40 rises from the lift-down position, the sub-opening 11B of the pit 10 that makes the undulating link device 30 movable outside the pit 10 is closed by the movable plate 60, and the movable plate is closed. A work floor surface for workers can be formed on the 60.

(e) When the vehicle support base 40 of each lifting device 20 is positioned at the lift-up position, the movable pit cover 50 of each lifting device 20 is configured to be separated from the opening level of the pit 10. Therefore, as shown in FIG. 2, a wide maintenance work space W3 that is not obstructed by the movable pit cover 50 can be secured directly under the lift target vehicle during the maintenance work in which the vehicle support base 40 is raised to the lift-up position.

(f) Each elevating device 20 pivotally supports the lower end of the first link 31 on the rotation support portion 13 provided on the gantry 12 inside the pit 10, and the sliding support provided on the gantry 12 inside the pit 10. The lower end of the second link 32 is slidably supported by the portion 14, the upper end of the first link 31 is pivotally attached to the intermediate link 33 together with the second link 32, and the upper end of the second link 32 is attached to the vehicle support base 40. It is pivotally attached, and both ends of the first sublink 31S are pivotally attached to the gantry 12 and the intermediate link 33, and a parallelogram link is provided by the four sections of the first link 31, the first sublink 31S, the gantry 12, and the intermediate link 33. A mechanism 20A is formed, both ends of the second sub-link 32S are pivotally attached to the vehicle support base 40 and the intermediate link 33, and the second link 32, the second sub-link 32S, the vehicle support base 40, and the intermediate link 33 4 When configured to form the parallelogram link mechanism 20B by the nodes, the movable pit cover 50 of (a) above can be attached to the second sublink 32S.

Regarding the above-described embodiment of the present invention, the present invention further discloses the following vehicle lift device.
<1> In the undulating link device 30 of each elevating device 20, the displacement of each link is made along the left-right direction orthogonal to the approach direction of the vehicle 1, and as shown in FIGS. 5 and 6, the vehicle support base 40 is maintained in a horizontal state, and is raised and lowered only in the vertical direction along the same vertical line V shown in FIG. As a result, the vehicle 1 is lifted while stably supporting the left and right lift points (or the left and right tires) of the vehicle 1 on the vehicle support base 40 in the opposite directions of the left and right without crotch tearing or the like. be able to.

<2> The undulating link device 30 of each elevating device 20 is displaced along the left-right direction in which the displacement of each link is orthogonal to the approach direction of the vehicle 1. As a result, as shown in FIGS. 18A to 18C, each of the undulating link devices 30 is stepped on in a wide range from the outside to the inside along the vehicle width direction directly below the lift target vehicle 1 in the maintenance work area. Since the vehicle 1 is lifted, the bending load acting on each link can be reduced, and the rigidity required for each link (for example, the plate width of the link element constituting each link) can be reduced. The overall size of the undulating link device 30 can be made compact. This means that the installation space of the undulating link device 30 in the maintenance work area is miniaturized, and as shown in FIGS. 3 and 20A, wide maintenance work spaces W1 and W2 are secured directly under the lifted vehicle 1. It means that maintenance workability can be improved.

<3> The undulating link device 30 of each elevating device 20 is made along the left-right direction in which the displacement of each link is orthogonal to the approach direction of the vehicle 1. As a result, each of the undulating link devices 30 is arranged and undulated only substantially directly below the central portion sandwiched between the front wheel side and the rear wheel side along the vehicle longitudinal direction of the lift target vehicle 1, and thus undulates in FIGS. As shown in (A), a wide maintenance work space W1 and W2 can be secured on the front wheel side and the rear wheel side directly under the vehicle. Moreover, the maintenance work spaces W1 and W2 are constant without being affected by the lift height H of the vehicle 1. Therefore, it is possible to improve the maintenance workability of the engine, suspension, mission, battery, etc. located on the front wheel side and the rear wheel side of the vehicle 1.

<4> The undulating link device 30 of each elevating device 20 is formed along the left-right direction in which the displacement of each link is orthogonal to the approach direction of the vehicle 1. Therefore, the undulating link devices 30 can be arranged point-symmetrically with each other and can be shared with each other, and the vehicle support base 40 can be shared with each other. Therefore, the number of component parts of each lifting device 20 can be reduced, and the number of assembly steps thereof can also be reduced. Etc., the productivity of the vehicle lift device can be improved.

Further, each elevating device 20 has no directionality in the vehicle approach direction, and maintenance work can be performed even if the vehicle 1 is entered from either of the two directions along the vehicle approach direction.

<5> The undulating link device 30 of each elevating device 20 is pivotally supported by the rotation support portion 13 on one side along the left-right direction of the pit 10 and the other side along the left-right direction of the pit 10. It has a second link 32 that is slidably supported by a sliding support portion 14 that is closer to it. Therefore, each undulating link device 30 has two links, a first link 31 that undulates toward the outside along the vehicle width direction directly below the lift target vehicle 1 in the maintenance work area, and a second link 32 that undulates toward the inside thereof. As a result, the vehicle 1 can be lifted while being stably stepped on in a wide range along the vehicle width direction directly below the linked vehicle 1, and the above-mentioned <2> can be stably realized.

<6> When the vehicle support base 40 rises from the opening 11 of the pit 10, each lifting device 20 has a work floor surface blocked by a movable plate 60 in the central portion of the opening sandwiched between the lifting devices 20 on both sides. Can be formed. The operator can perform maintenance work on a wide work floor surface formed by the existing work floor surfaces in the front and rear of the pit 10 and the work floor surface formed by the movable plate 60 in the center.

<7> When the vehicle support base 40 of each lifting device 20 is positioned at the lift-up position and the intersections of the first and second links 31 and 32 are arranged in front of and behind each existing work floor surface. As shown in FIGS. 1 and 2, the lower edge portions below the intersections of the first and second links 31 and 32 are sandwiched between the lower edges, and are formed directly below the intersections and above the work floor surface. It is assumed that the triangular inter-link gap R to be formed faces each work floor surface before and after them. When the elevating device 20 in which the triangular inter-link gap R is reduced and displaced is lowered, the operator is not below the descending vehicle 1, and his / her feet are in the reduced / displaced inter-link gap R. There is no risk of pinching.

<8> It is composed of an assembly of two linkers (a set of two link plates 31P and 31P for the first link 31) in which each link constituting the undulating link device 30 of each elevating device 20 is paired. As shown in FIG. 21 (A), each of the two link children forming each link in the left lifting device 20 and each of the two link children forming each link in the right lifting device 20 are staggered. It is arranged so as to be overlapped. Therefore, the area occupied by both elevating devices 20 in the maintenance site can be reduced. As a result, the soil construction area of the maintenance site can be reduced, and the area of the pit 10 can also be reduced.

In the conventional example shown in FIG. 19, the soil construction area and the pit area of the maintenance site become large as shown in FIGS. 21 (B) or 21 (C).

<9> Each elevating device 20 has each movable pit cover 50 attached to the constituent link of the undulating link device 30 so as to accompany the undulating link device 30, and the movable pit cover 50 of each elevating device 20 is When the vehicle support base 40 is positioned at the lift-down position, a part of the opening 11 of the pit 10 that is not closed by the vehicle support base 40 is closed. At this time, the movable pit cover 50 together with the vehicle support base 40 closes almost the entire opening 11 of the pit 10 to form a walking surface for the worker and an approach road surface for the vehicle 1 to be maintained. The vehicle 1 can be entered into the maintenance work area.

Further, the movable pit cover 50 is separated upward from a part of the opening of the pit 10 in the process of raising the vehicle support base 40 from the lift-down position, and during maintenance work in which the vehicle support base 40 is raised to the lift-up position. , A wide maintenance work space W1 and W2 that are not obstructed by the movable pit cover 50 is secured directly under the lift target vehicle 1.

<10> Each of the elevating devices 20 pivotally supports the lower end of the first link 31 on the rotation support portion 13 provided on the gantry 12 inside the pit 10, and slides provided on the gantry 12 inside the pit 10. The lower end of the second link 32, which is twice as long as the first link 31, is slidably supported on the support portion 14, and the upper end of the first link 31 is pivotally attached to the intermediate link 33 together with the midpoint of the second link 32. Then, the upper end of the second link 32 is pivotally attached to the vehicle support base 40, and both ends of the first sublink 31S having the same length as the first link 31 are pivotally attached to the gantry 12 and the intermediate link 33. A parallelogram link mechanism 20A is formed by the four sections of the first link 31, the first sublink 31S, the gantry 12, and the intermediate link 33, and the vehicle support base 40 and the intermediate link 33 are half the length of the second link 32. Both ends of the second sublink 32S are pivotally attached, and the parallelogram link mechanism 20B is formed by the four sections of the second link 32, the second sublink 32S, the vehicle support base 40, and the intermediate link 33. At this time, the vehicle support base 40 can be maintained in a horizontal state as described in (a) above and can be raised and lowered only in the vertical direction. Further, the movable pit cover 50 of <9> can be attached to the second sublink 32S.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like within a range not deviating from the gist of the present invention. Included in the present invention.

According to the present invention, in the dual-purpose lift device, a relatively large pit opening that allows the undulating link device and the vehicle support to be moved inside and outside the pit while reducing the size of the vehicle support of each lifting device. It can be made possible to reliably close the vehicle support when it is lifted down.

10 Pit 11 Opening 11A Main opening 11B Sub-opening 12 Stand 13 Rotating support 14 Sliding support 20 Elevating device 20A, 20B Parallelogram link mechanism 30 Undulating link device 31 1st link 31S 1st sub-link 32 2nd Link 32S 2nd sub-link 33 Intermediate link 40 Vehicle support 41 Lift table 42 Swing arm 50 Movable pit cover 52K Long hole 60 Movable plate 100 Vehicle lift device

Claims (6)

A pit is provided in the maintenance work area defined on the floor of the maintenance site, and a pair of lifting devices are stored inside the pit.
Each elevating device has an undulating link device composed of a plurality of links, and a vehicle support base for supporting the vehicle is mounted on the upper part of the undulating link device.
Each elevating device allows the undulating link device and the vehicle support to be moved inside and outside the pit through a pit opening provided at the same level as the floor of the maintenance site, and the vehicle support is a part of the pit opening. A vehicle lift device that allows the vehicle to be raised and lowered between a lift-down position that is positioned at a certain main opening and closes the main opening and a lift-up position that positions the vehicle support base above the pit.
Each elevating device has a movable pit cover that is attached to the configuration link of the undulating link device so that it can accompany the undulating operation of the undulating link device.
The movable pit cover of each lifting device closes the sub-opening, which is another part of the pit opening that is not blocked by the vehicle support when the vehicle support is positioned on the side of the lift-down position. A vehicle lift device that opens a sub-opening of a pit so that the undulating link device can be moved out of the pit from the sub-opening and the main opening in the process of ascending from the lift-down position of the vehicle support. The vehicle support base of each of the lifting devices is provided with a swivel arm that can swivel to lift the lower surface of the stopped vehicle when it enters the vehicle maintenance work area.
Each lifting device has a lift standby stage in which the vehicle support is positioned in the lift-down position, and the vehicle support is started to rise from the lift-down position so that the swivel arm can be swiveled with respect to the underside of the vehicle at a level above the pit opening. The stage in which the movable pit cover is maintained at the opening level of the pit without accompanying the undulating operation of the undulating link device, and each lifting device raises the vehicle support base from the initial stage of the lift. The vehicle according to claim 1, wherein the movable pit cover is attached to a constituent link of the undulating link device so that the movable pit cover accompanies the undulating operation of the undulating link device with a delay of a certain amount. Lift device. The claim that the movable pit cover of each elevating device is attached to the constituent link of the undulating link device via the elongated hole portion, and is movable relative to the constituent link within the range of the elongated hole of the elongated hole portion. 2. The vehicle lift device according to 2. Each of the elevating devices has a movable plate attached to it.
The movable plate is set to a pit closing position that closes at least a part of the sub-opening when the movable pit cover of each lifting device is separated upward from the sub-opening of the pit, and the movable pit cover is set to the sub-opening of the pit. The vehicle lift device according to any one of claims 1 to 3, which is set at a storage position in the pit that is stored inside the pit when the portion is closed. The method according to any one of claims 1 to 4, wherein the movable pit cover of each lifting device is configured to be separated from the opening level of the pit when the vehicle support base of each lifting device is positioned at the lift-up position. Vehicle lift device. Each of the lifting devices
The lower end of the first link is pivotally supported by the rotary support provided on the gantry inside the pit, and the lower end of the second link is slidably supported by the sliding support provided on the gantry inside the pit. The upper end of the 1st link is pivotally attached to the intermediate link together with the 2nd link, and the upper end of the 2nd link is pivotally attached to the vehicle support.
Both ends of the first sublink are pivotally attached to the gantry and the intermediate link, and a parallelogram link mechanism is formed by the four nodes of the first link, the first sublink, the gantry and the intermediate link.
Both ends of the second sublink are pivotally attached to the vehicle support and the intermediate link, and a parallelogram link mechanism is formed by the four sections of the second link, the second sublink, the vehicle support and the intermediate link. Being done
The vehicle lift device according to any one of claims 1 to 5, wherein a movable pit cover is attached to the second sublink.

Images