JP7221528B2 - Vehicle lift device - Google Patents

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 of a maintenance shop, and a pair of lifting devices are housed inside the pit. Some systems have a hoisting link system consisting of a plurality of links, and a vehicle support base (eg, a lift table) for supporting the vehicle is mounted on the top of the hoisting link system.

In the vehicle lift device described in Patent Document 1, each lifting device can move the hoisting link device and the vehicle support base into and out of the pit through the opening of the pit provided at the same level as the floor surface of the maintenance space. and a lift-down position in which the vehicle support base is positioned at the opening of the pit to close the main opening, and a lift-up position in which the vehicle support base is positioned above the pit.

Japanese Patent Application Laid-Open No. 2016-130150

Each lifting device in the vehicle lift device described in Patent Document 1 moves the opening of the pit, which has a relatively large opening area, to the lift-down position so that the hoisting link device and the vehicle support base can be moved in and out of the pit. Since it is blocked by the positioned vehicle support base, the plane area of the vehicle support base becomes large. This means that the vehicle support stand that supports the vehicle during lift-up partially covers a maintenance work area where the engine, suspension, transmission, battery, etc., are located on the underside of the vehicle, or a range close to it. This means that there is a risk of impairing maintenance workability as it is covered from below.

In order to improve maintenance workability by reducing the area covered by the vehicle support base positioned at the lift-up position on the underside of the vehicle, or to achieve weight reduction and compactness of the vehicle lift device, the vehicle support base has been developed. When attempting to reduce the size of the pit, it becomes difficult to completely close the above-mentioned relatively large opening of the pit by the small work support platform positioned at the lift-down position, and the walking surface for workers and the vehicle Inconvenience arises that the approach road surface cannot be completed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle lift device with a relatively large opening for a pit that allows the hoisting link device and the vehicle support base to move in and out of the pit while reducing the size of the vehicle support base of each lifting device. To securely close a vehicle support base when the vehicle support base is lifted down.

In the invention according to claim 1, a pit is provided in a maintenance work area defined on the floor of a maintenance shop, and a pair of lifting devices are housed inside the pit, and each lifting device consists of a plurality of links. A hoisting link device is provided, and a vehicle support base for supporting a vehicle is mounted on the top of the hoisting link device, and each lifting device has the hoisting link device and the vehicle support base on the same level as the floor of the maintenance shop. a lift-down position in which the vehicle support base is positioned in a main opening that is a part of the pit opening and closes the main opening; and a vehicle support base in the pit. and a lift-up position positioned above the vehicle, wherein each lifting device is attached to a constituent link of the hoisting link device so as to accompany the hoisting motion of the hoisting link device. and the movable pit cover of each lifting device is the other one of the openings in the pit not blocked by the vehicle support platform when the vehicle support platform is positioned to the side of the lifted down position. The sub-opening of the pit is opened to move the hoisting link device out of the pit through the sub-opening and the main opening in the process of raising the vehicle support platform from the lift-down position. 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. It is the one that was made.

The invention according to claim 2 is the invention according to claim 1, further comprising a turning arm capable of lifting the lower surface of the stopped vehicle when the vehicle support base of each lifting device has entered the vehicle maintenance work area. A lift standby stage in which each lifting device positions the vehicle support base at the lift-down position, and the vehicle support base starts to rise from the lift-down position, and the swing arm swings with respect to the lower surface of the vehicle at a level above the opening of the pit. Between the initial stage of the lift that enables the lift, the movable pit cover is maintained at the opening level of the pit without accompanying the hoisting operation of the hoisting link device, and each lifting device raises the vehicle support platform above the initial stage of the lift. The movable pit cover is attached to the constituent links of the hoisting link device so that the movable pit cover accompanies the hoisting motion of the hoisting link device with a certain amount of delay in the step of moving the hoisting link device. .

The invention according to claim 3 is the invention according to claim 2, wherein the movable pit cover of each lifting device is attached to the constituent link of the hoisting link device via a long hole, and the long hole of the long hole is attached to the link. relative to the constituent links within the range of .

The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein each of the lifting devices further has a movable plate, and the movable plate includes a movable pit cover of each lifting device. The movable pit cover is set to a pit closing position that closes at least part of the sub-opening when separated upward from the opening, and is accommodated inside the pit when the movable pit cover closes the sub-opening of the pit. It is designed to be set at the retracted position.

The invention according to claim 5 is the invention according to any one of claims 1 to 4 , wherein each of the lifting devices further pivotally supports the lower end of the first link on a rotation support portion provided on a frame inside the pit. The lower end of the second link is slidably supported by a sliding support provided on a frame inside the pit, the upper end of the first link is pivotally connected to the intermediate link together with the second link, and the upper end of the second link is is pivotally attached to the vehicle support, both ends of the first sub-link are pivotally attached to the frame and the intermediate link, and the four joints of the first link, the first sub-link, the frame and the intermediate link form a parallelogram link mechanism. , and both ends of the second sub-link are pivotally attached to the vehicle support base and the intermediate link to form a parallelogram link mechanism with the four joints of the second link, the second sub-link, the vehicle support base and the intermediate link. A movable pit cover is attached to the second sub-link.

(Claim 1)
(a) Each lifting device has a respective movable pit cover attached to a constituent link of the luffing linkage so as to be able to accompany said luffing linkage, each movable pit cover having the vehicle support platform in the lifted down position. When positioned to the side, it closes a sub-opening which is another part of the opening of the pit not covered by the vehicle support platform. Therefore, in an attempt to reduce the area covered by the vehicle support base positioned at the lift-up position to cover the lower surface of the vehicle to improve maintenance workability, or to achieve weight reduction and compactness of the vehicle lift device, the vehicle support base has been developed. When the vehicle support stand is positioned on the side of the lift-down position, the movable pit cover that closes the sub-opening of the pit, along with the vehicle support stand that closes the main opening of the pit, moves the pit. Almost all of the openings of the pit, including the main opening and sub-openings, are closed to form a walking surface for workers and an approach road surface for vehicles to be serviced to bring the vehicles into the maintenance work area. can enter.

Also, in the process of raising each vehicle support platform from the lift-down position, the sub-openings of the pit are opened by the respective movable pit covers, and the luffing linkages are moved to a relatively large opening of the pit, including the sub-openings and the main opening. to the inside and outside of the pit.
Further, 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. Therefore, during the maintenance work in which the vehicle support base is lifted to the lift-up position, a wide maintenance work space can be secured immediately below the vehicle to be lifted, which is not obstructed by the movable pit cover.

(Claim 2)
(b) Each lifting device is provided with a swiveling arm that enables the vehicle support base of each lifting device to lift the lower surface of the stopped vehicle when it enters the vehicle maintenance work area, and each lifting device positions the vehicle support base at the lift-down position. The movable pit cover shall be placed between the lift standby phase and the lift initial phase in which the vehicle support base begins to rise from the lift-down position and the swing arm can swing against the underside of the vehicle at a level above the opening of the pit. The pit opening level is maintained without accompaniment with the hoisting motion of the hoisting link device, and the movable pit cover moves the hoisting link device to the hoisting motion at the stage in which each lifting device raises the vehicle support table above the initial lift stage. The movable pit cover is attached to the constituent links of the luffing linkage so as to follow with a certain amount of delay with respect to the luffing linkage. 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 (a) for the vehicle to be serviced by the movable pit cover. The pivoting arm of the platform can be raised to a level above the opening of the pit and set to a pivotable level relative to the underside of the vehicle. This means that every time a plurality of vehicles are successively entered into the maintenance work area and the maintenance work thereof is repeatedly carried out, the vehicle support base is moved from the previous lift-up position for the vehicle to the lift-down position for the lift standby stage. If the swing arm is lowered to a turnable level without lowering to the above-mentioned level, the previous vehicle can be left from the maintenance work area, and the next vehicle can be subsequently entered into the maintenance work area, thereby performing the maintenance work. It becomes something that can improve productivity.

(Claim 3)
(c) A movable pit cover of each lifting device is attached to a constituent link of the luffing linkage through an elongated hole and is movable relative to the constituent link within the range of the elongated hole of the elongated hole. By doing so, the relative movement structure of the movable pit cover with respect to the constituent links of the hoisting link device can be easily realized.

(Claim 4)
(d) each elevator has a movable plate associated therewith, which blocks at least a portion of the sub-opening of the pit when the movable pit cover of each elevator is spaced upwardly from the sub-opening of the pit; Set to pit closed position. As a result, when the vehicle support platform is raised from the lift-down position, the sub-opening of the pit that allows the luffing link device to move out of the pit is blocked by the movable plate, and the operator is placed on the movable plate. can form a working floor for

(Claim 5 )
(e) Each elevating device pivotally supports the lower end of the first link on a rotation support provided on a frame inside the pit, and the lower end of the second link on a sliding support provided on a frame 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 base, and the first sub-link is attached to the frame and the intermediate link. Both ends are pivotally connected to form a parallelogram link mechanism by four joints of the first link, the first sublink, the frame and the intermediate link, and the both ends of the second sublink are pivoted to the vehicle support base and the intermediate link. When the second link, the second sub-link, the vehicle support base, and the intermediate link form a parallelogram link mechanism, the second sub-link is provided with the above-mentioned movable pit (a). A cover can be attached.

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

As shown in FIGS. 1 to 4, the vehicle lift device 100 is designed to operate in an approach direction X (longitudinal direction of the vehicle) (in FIGS. A pair of left and right lifting devices 20 are provided on both sides in a left-right direction Y (vehicle width direction) (FIGS. 1, 12 to 17) perpendicular to FIG.

In this embodiment, a pit 10 (FIG. 2) is recessed in a maintenance work area defined on the floor of a maintenance shop, and a pair of lifting devices 20 are housed inside the pit 10. As shown in FIG.

Each lifting device 20 has a hoisting link device 30 consisting of a plurality of links, and a vehicle support table 40 (a lift table 41 and front and rear turning arms 42, 42) for supporting a vehicle is mounted on the top of the hoisting link device 30. and prepare. Specifically, each vehicle support table 40 has a lift table 41 provided on the upper part of the hoisting link device 30, and can swing forward and backward so that the lower surface of the vehicle 1 that has entered the vehicle maintenance work area and stopped can be lifted. Arms 42 are rotatably provided at both front and rear ends of the lift table 41 .

Each lifting device 20 is operated by a lifting actuator (lifting cylinder device in this embodiment) 21 to move the lifting link device 30 and the vehicle support base 40 through the opening 11 of the pit 10 provided at the same level as the floor surface of the maintenance shop. to move in and out of the pit 10. The hoisting link device 30 of each lifting device 20 is positioned at the left and right main openings 11A (FIG. 1), which are part of the opening 11 of the pit 10, to block the main openings 11A. , and a lift-up position where the vehicle support base 40 is positioned above the pit 10.

Here, each link of the hoisting link device 30 of each lifting device 20 is displaced along the left-right direction Y perpendicular to the entering direction X of the vehicle 1 . Further, the hoisting link device 30 of each lifting device 20 maintains the vehicle support base 40 in a horizontal state and raises and lowers it only in the vertical direction.

The hoisting link device 30 of each lifting device 20 is arranged on one side (outer side) of the pit 10 along the horizontal direction Y orthogonal to the entry direction X of the vehicle 1 on the frame 12 inside the pit 10 . One side (outer side) of the pit 10 along the left-right direction orthogonal to the approach direction X of the vehicle 1 in the first link 31 pivotally supported by the rotation support portion 13 that is attached to the pit 10 and the frame 12 inside the pit 10 ) to the other side (inner side), and at least two of the second links 32 are slidably supported by the sliding (or rolling) support portions 14 .

In this embodiment, as shown in FIGS. 5 and 6, each lifting device 20 pivotally supports the lower end portion a of the first link 31 to a rotation support portion 13 provided on the frame 12 inside the pit 10, and 10 slidably supports the lower end portion a of the second link 32 having a length 2×L1 which is twice the length L1 of the first link 31 on the sliding support portion 14 provided on the frame 12 inside the first link. The upper end b of the second link 32 is pivoted to the intermediate link 33 together with the midpoint c of the second link 32 (central portion of the length of the second link 32), and the upper end b of the second link 32 is connected to the vehicle support base 40 (lift It is pivotally attached to the table 41). In each lifting device 20, both ends a and b of a first sub-link 31S having the same length as the first link 31 are pivotally attached to the base 12 and the intermediate link 33, so that the first link 31 and the first sub-link The four joints of the link 31S, the base 12 and the intermediate link 33 form a parallelogram link mechanism 20A. In each lifting device 20, both end portions a and b of a second sub-link 32S, which is half the length of the second link 32, are pivotally attached to the vehicle support base 40 (lift table 41) and the intermediate link 33. The four joints of the second link 32, the second sub-link 32S, the vehicle support base 40 (lift table 41) and the intermediate link 33 form a parallelogram link mechanism 20B. Each lifting device 20 has a movable pit cover 50 attached to the second sub-link 32S.

In each lifting device 20, the cylinder base end of the lifting cylinder device that constitutes the lifting actuator 21 is pivotally attached to the base 12, and the piston rod tip end of the lifting cylinder device is pivotally supported to the intermediate portion of the second link 32. It is assumed that

1 and 21, each of the links 31, 32, 31S, 32S, and 33 constituting the hoisting link device 30 has two link members (link plates or links). A rod) (for the first link 31, a set of two link plates 31P and 31P shown in FIG. 21A) is connected to a joint material (for the first link 31, the joint shown in FIG. 21A). 31R), and each of the two linkers forming each link in the left lifting device 20 and the two linking members forming each link in the right lifting device 20. are arranged so as to be staggered.

In the vehicle lift device 100, front and rear fixed pit covers 15 are provided on both front and rear sides of the pit 10 along the approach direction X of the vehicle 1 (each fixed pit cover 15 is flush with the floor surface of the maintenance area). Instead of providing the pit cover 15, the floor surface of the maintenance area may be extended to both front and rear sides of the pit 10). As a result, each lifting device 20 moves the hoisting link device 30 and the vehicle support table 40 (lift table 41 and turning arm 42 ) to the opening sandwiched between the front and rear fixed pit covers 15 in the pit 10 by the operation of the lifting actuator 21 . 11 (main openings 11A on the left and right and a sub-opening 11B in the center) to be movable in and out of the pit 10, and the vehicle support base 40 is positioned in the opening 11 of the pit 10 to close the opening 11. A lift-down position (FIGS. 5C and 6C) where the front and rear fixed pit covers 15 are flush with each other, and a lift-up position where the vehicle support base 40 is positioned above the pit 10 (FIG. 5A). , FIG. 6A). FIGS. 5(B) and 6(B) show the lift intermediate state.

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

In addition, each lifting device 20 has a respective movable pit cover 50 attached to the constituent links of the luffing linkages 30 so as to be able to accompany the luffing movements of the luffing linkages 30 . The movable pit cover 50 of each lifting device 20 moves the vehicle support base 40 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 left and right halves of the entire sub-opening 11B, which is the other part of the opening 11 of the pit 10 that is not blocked by the pit 10 (the central portion sandwiched between the left and right main openings 11A), are blocked (Fig. 12). In addition, the movable pit cover 50 of each lifting device 20 opens each half of the sub-opening 11B of the pit 10 to move each hoisting link 30 to the sub-opening 11B in the process in which each vehicle support base 40 is lifted from the lift-down position. Each half of the opening 11B and the main opening 11A move out of the pit 10 and can be spaced upwards.

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 is lifted from the opening level of the pit 10. configured to be spaced upward.

As shown in FIGS. 7 and 8, each movable pit cover 50 in each lifting device 20 has side plates 52 fixed to the lower front and rear sides of a flat plate-shaped cover plate 51. The second sub-link of each lifting device 20 An assembly consisting of two link plates 32SP constituting 32S and their connecting members 32SR covers the link plates 32SP from above so as to be generally parallel and relatively movable. Each movable pit cover 50 is provided on each of the left and right side plates 52 on a guide roller 55 pivotally supported by one each of right and left guide bolts 54 planted in bosses 53 provided on each of the front and rear link plates 32SP. It is slidably engaged in the long hole portion 52K. A guide washer 56 is interposed between the head 54A of the guide bolt 54 and the guide roller 55. As shown in FIG. The long hole portion 52K of the side plate 52 extends in a direction substantially orthogonal to the plate surface of the cover plate 51. As shown in FIG. As a result, the movable pit cover 50 is attached to the second sub-link 32 of the hoisting link device 30 via the elongated hole portion 52K, and is attached to the second sub-link 32S in the range of the elongated hole of the elongated hole portion 52K. Relative movement is made possible.

Each movable pit cover 50 is attached to the guide roller 55 provided on the second sub-link 32S of the hoisting link device 30 through the long hole 52K, so that the movable pit cover 50 is attached to the hoisting link device 30. It does not accompany the action immediately, but follows it with a delay as follows. That is, a lift standby stage (FIG. 12) in which each lifting device 20 positions the vehicle support table 40 at the lift-down position, and the vehicle support table 40 is started to be raised from the lift-down position, and the swing arm 42 is moved from the opening 11 of the pit 10. Between the lift initial stage (FIG. 13) in which it is possible to turn against the underside of the vehicle 1 at the upper level, the movable pit cover 50 is not accompanied by the hoisting action of the hoisting link device 30, and the opening level of the pit 10 is reached. maintain. At the stage when each lifting device 20 raises the vehicle support table 40 from the initial stage of the lift, the movable pit cover 50 moves within the range of the long hole 52K with respect to the hoisting operation of the hoisting link device 30. The movable pit cover 50 is attached to the second sub-link 32S of the hoisting link device 30 through the elongated hole 52K so as to be accompanied by a corresponding fixed amount.

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

(1) The lifting actuator 21 of each lifting device 20 raises and lowers the lifting link device 30 on the lift-up side, and lifts the lift table 41 of the vehicle support table 40 to the lift-up position side exceeding, for example, 150 mm from the lift-down position. 9 and 10, when the swivel arm 42 is positioned at a level exceeding 150 mm above the opening 11 of the pit 10 (upper surface level of the front and rear fixed pit covers 15), the second sub sub of the hoisting link device 30, as shown in FIGS. The movable pit cover 50 attached to the guide roller 55 provided on the link 32S through the long hole portion 52K is arranged such that the upper end of the long hole portion 52K is placed on the guide roller 55 by the weight of the movable pit cover 5. It is supported by the second sub-link 32S and lifted to the lift-up position side as the second sub-link 32S moves based on the hoisting motion of the hoisting link device 30. As shown in FIG.

(2) When the lifting actuator 21 of each lifting device 20 causes the lifting link device 30 to lie down as described in (1) above, and the vehicle support table 40 is positioned at the lift initial stage above 150 mm from the lift-down position, the movable pit cover As shown in FIGS. 11 to 14, the cover plate 50 contacts a stopper 12K such as a bolt provided on the rising portion of the frame 12 and a stopper 63K provided on an elevation guide 63 for the movable plate 60, which will be described later. 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 surfaces of the front and rear fixed pit covers 15. As shown in FIG. Thereby, the movable pit cover 50 forms a walking surface for workers and an approach road surface for vehicles to be serviced together with the front and rear fixed pit covers 15 .

At this time, the hoisting link device 30 positions the vehicle support table 40 at the initial lift stage as described above, and as shown in FIGS. 150 mm higher than the lift target vehicle so that the swivel arm 42 can swivel with respect to the lower surface of the vehicle to be lifted.

(3) When the lifting actuator 21 of each lifting device 20 causes the hoisting link device 30 to lie down further than in (2) above, the guide roller 55 provided on the second sub-link 32S of the hoisting link device 30 moves to the floor of (2) above. 11 and 12, the vehicle support base 40 is moved downward in the long hole 52K of the movable pit cover 50 stopped at the plane position, and the vehicle support base 40 is set at the lift-down position as shown in Figs. Become. At this time, the lift table 41 of the vehicle support base 40 is placed on stoppers 12L such as bolts provided at the rising portion of the pedestal 12 and stopped.

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

Each lifting device 20 has a movable plate 60 associated therewith. In this embodiment, one movable plate 60 corresponding to each of the pair of left and right lifting devices 20 is provided. However, one common movable plate 60 may be provided for each lifting device 20 .

When the movable pit cover 50 of each lifting device 20 is separated upward from the sub-opening 11B of the pit 10, the movable plate 60 moves at least part of the sub-opening 11B (both movable pit covers 50 in this embodiment). Each half of the corresponding sub-opening 11B) is closed and positioned at a pit closing position flush with the front and rear fixed pit covers 15 to form a work floor above the sub-opening 11B. Further, the movable plate 60 is positioned at the in-pit housing position where the movable plate 60 is housed 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 this embodiment.
That is, the movable plate 60 is mounted on an X-link device 70 provided inside the pit 10, and an elevation guide roller 62 fixed to an elevation frame 61 of the movable plate 60 is erected on the base 12 for elevation. Guided by a guide 63, it ascends and descends between the pit closed position (FIG. 9) and the in-pit storage position (FIG. 11).

The X-link device 70 has an X-shape in which two links 71 and 72 are pin-connected at their midpoints. is slidably supported by the elongated hole 74A of the sliding (or rolling) support portion 74 provided on the lifting frame 61, and the lower end of the link 72 is slidably (or rollingly) supported by the mount 12. The link 72 is slidably supported by the elongated hole 75 A of the portion 75 , and the upper end of the link 72 is attracted to the rotation support portion 76 provided on the lifting frame 61 . A tension spring 77 (not shown in FIG. 10) is tensioned between the lower ends of the links 71 and 72, and a tension spring 78 (not shown in FIG. 10) is tensioned between the upper ends of the links 71 and 72. , and always applies a spring force in the extension direction to the X link device 70 . The movable plate 60 is always urged upward by spring forces of tension springs 77 and 78 acting in the extension direction of the X link device 70 . stops the sliding end of the lower end of link 72 in the direction of extension of X linkage 70 . By adjusting the sliding end of the link 72 with the adjuster portion 75R of the sliding support portion 75, the rising end of the X link device 70 is restricted and positioned at the pit closing position.

An L-shaped lock arm 64 is pivotally supported on a pivot portion 64A provided on the pedestal 12, and a roller 64B is provided at the upper end portion 64B of the lock arm 64 to contact the lower surface of the movable plate 60 at the pit closing position. there is The lock arm 64 is positioned between a locked position in which the roller 64B slightly bites to one side of the vertical line passing through the pivot portion 64A and an unlocked position in which the roller 64B is separated from the vertical line passing through the pivot portion 64B to the other side. Rockable.

The lock arm 64 is always biased toward the locked position by a tension spring 65 stretched between itself and the pedestal 12. A stopper bolt 65K is provided on the pedestal 12 so that the position can be adjusted. Its swing limit is regulated and positioned at the locked position. At this time, the lock arm 64 pushes the lower surface of the movable plate 60 while supporting it with the roller 64B at the locked position, and holds the movable plate 60 at the pit closing position.

The lock arm 64 is additionally provided with a release arm 66 for switching the lock arm 64 between the locked position and the unlocked position against the biasing force of the tension spring 65 . The release arm 66 is pivotally supported at its midsection on the movable plate 60 and has rollers 66A and 66B at each end. The release arm 66 always brings the roller 66A into contact with the sliding 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, the first link 31 of the hoisting link device 30 is provided with a release plate 67 . When the release plate 67 of the first link 31, which descends with the lying motion of the hoisting 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 in release position. When the lock arm 64 is positioned at the unlocked position, the movable plate 60 loses the thrust-holding state by the lock arm 64 and can move up and down between the pit closed position and the pit storage position. That is, when the lock arm 64 is at the unlocked position, the pushing roller 68 provided on the intermediate link 33 of the lifting link device 30 pushes the upper surface of the movable plate 60 against the spring force of the tension springs 77 and 78. As a result, the X link device 70 is contracted and the movable plate 60 can be pushed into the pit storage position.

When the movable plate 60 is pushed from the pit closed position toward the pit storage position, the upper end of the rising lock arm 64 positioned at the unlocked position and its roller 64B are provided on the movable plate 60. A certain opening/closing lid 60K (FIG. 1) is pushed open from below, and protrudes outward from the casement window.

In addition, the movable plate 60 of this embodiment has a main plate 60A attached near the center along the left-right direction of the pit 10 on the top of the lift frame 61, 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 closing position positions the profiling plate 60B on a horizontal plane flush with the main plate 60A. As shown in FIG. 9, the movable plate 60 between the pit closed position and the in-pit storage position moves the roller 60C of the copying plate 60B to the cam piece 60L provided on the first link 31 of the hoisting link device 30. The profiling plate 60B is introduced between the first link 31 and the intermediate link 33 of the hoisting link device 30 which is set in the prone state.

Therefore, in each lifting device 20, the movable plate 60 is moved between the pit closed position and the pit retracted position as described below in accordance with the lifting motion of the vehicle support table 40 and the movable pit cover 50 caused by the lifting motion of the hoisting link device 30. up and down in between.

(1) The lifting actuator 21 of each lifting device 20 raises and lowers the hoisting link device 30 on the lift-up side, and the movable pit cover 50 accompanying the second sub-link 32S of the hoisting link device 30 moves from the sub-opening 11B of the pit 10. When the pushing rollers 68 provided on the intermediate links 33 of the luffing linkages 30 are spaced upwardly and are positioned above and away from the upper surface of the movable plate 60, the movable plate 60 acts as a tension spring, as shown in FIG. It is mounted on the X link device 70 positioned at the raised end by the spring force of 77, 78, closes the sub-opening 11B of the pit 10, and moves to the raised position flush with the upper surfaces of the front and rear fixed pit covers 15. set.

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

(2) The lifting actuator 21 of each lifting device 20 causes the hoisting link device 30 to lie down as described in (1) above, and the release plate 67 provided on the first link 31 of the hoisting link device 30 moves the lock arm 64 through the release arm 66. is positioned at the unlocked position, as shown in FIG. 10, the movable plate 60 loses the thrust-holding state by the lock arm 64 and can move up and down between the pit closed position and the pit storage position.

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

(3) The lifting actuator 21 of each lifting device 20 makes the lifting link device 30 more prone than in (2) above, and the movable pit cover 50 is flush with the upper surfaces of the front and rear fixed pit covers 15 as described above. When the vehicle support base 40 is positioned at the plane position and further positioned at the lift-down position where the upper surfaces of the front and rear fixed pit covers 15 are flush with each other as described above, the hoisting link device 30 is operated as shown in FIG. The X link device 70 is contracted to the contracted end by the pushing roller 68 provided on the intermediate link 33 of the X-axis, and the movable plate 60 is pushed and held at the in-pit storage position.

When the lifting actuator 21 of each lifting device 20 raises the hoisting link device 30 from the lift-down state of (3) above toward the lift-up side of (1) above, the movable plate 60 moves from the above-mentioned (1) to (3). In reverse order, it rises from the pit storage position 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 at the lift-down position (lift standby stage) by the hoisting link device 30, the vehicle support base 40 moves to the pit 10 as shown in FIG. The left and right main openings 11A are closed.

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

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

(2) When the lifting actuator 21 of each lifting device 20 positions the vehicle support base 40 at the initial lift stage exceeding 150 mm from the lift-down position (lift stage) of the above (1) by the hoisting link device 30, FIG. As shown in FIG. 14, the vehicle support base 40 allows the pivot arm 42 to pivot relative to the underside of the vehicle to be lifted, and the pivot arm 42 is positioned at a lift point on the underside of the vehicle to be serviced.

At this time, the movable pit cover 50 is kept flush with the front and rear fixed pit covers 15, and the walking surface for workers and the approach road surface for vehicles to be serviced formed in (1) above. to maintain

(3) The lifting actuator 21 of each lifting device 20 lifts the vehicle support base 40 by the lifting link device 30 to the lift-up position side from the lift initial stage of (2) above, and the turning arm of the vehicle support base 40 is lifted. 42 lifts the vehicle through the lift points of the vehicle to be serviced, as shown in FIGS. , and is separated upward from the opening level of the pit 10 (sub-opening 11B).

(4) When the lifting actuator 21 of each lifting device 20 lifts the vehicle support base 40 further toward the lift-up position than in (3) above, the movable plate 60 moves to the pit as shown in FIG. It rises from the inner stowed position and is positioned at the pit closing position. The movable plate 60 closes at least part of the sub-opening 11B in the pit 10 from which the movable pit cover 50 is separated, and forms a work floor on the sub-opening 11B.

As a result, the operator maintains the vehicle to be serviced, which is positioned at the lift-up position by the vehicle support base 40, from below on the working floor formed by the front and rear fixed pit covers 15 and the movable plates 60. enable.

In each lifting device 20, when the lifting actuator 21 lays down the lifting 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, 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. Reference numeral 51 denotes a wall surface 51P for maintenance work, and a work instruction sheet or the like can be attached to this wall surface 51P.

In the vehicle lift device 100, a workbench 51A and a parts box 51B as shown in FIG. Alternatively, a part of the cover plate 51 may be cut off as shown in FIG.

24 or 25, each lifting device 20 includes a base 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 base 40. The displacement of each link forming these seven joints is made 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 and is moved vertically. It is also possible to configure the hoisting link device 30 that can be raised and lowered only by the hoist.

The hoisting link device 30 of each lifting device 20 shown in FIGS. The lower end a of the second link 32 having a length 2×L1 which is twice the length L1 of the first link 31 is slidably supported on the supporting portion 14, and the upper end b of the first link 31 is slidably supported by the second link 32. It is pivotally connected to the intermediate link 33 together with the center point c, and the upper end b of the second link 32 is pivotally connected to the vehicle support base 40 (lift table 41). In each lifting device 20, both ends a and b of a first sub-link 31S having the same length as the first link 31 are pivotally attached to the base 12 and the intermediate link 33, so that the first link 31 and the first sub-link The four joints of the link 31S, the base 12 and the intermediate link 33 form a parallelogram link mechanism 20A. In each lifting device 20, both end portions a and b of a second sub-link 32S, which is half the length of the second link 32, are pivotally attached to the vehicle support base 40 (lift table 41) and the intermediate link 33. The four joints of the second link 32, the second sub-link 32S, the vehicle support base 40 (lift table 41), and the intermediate link 33 form a parallelogram link mechanism 20B. 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 pivoted to the intermediate link 33 at the same point. The distance L2 between the lower ends a of the first link 31 and the first sub-link 31S, the upper end b of the first link 31 (or the middle point c of the second link 32) and the upper end of the first sub-link 31S. (or the lower end a of the second sub-link 32S) and the distance L2 between the upper ends b of the second link 32 and the second sub-link 32S are made equal.

As a result, the hoisting link devices 30 of each lifting device 20 are displaced along the left-right direction perpendicular to the approach direction of the vehicle 1, and maintain the vehicle support base 40 in a horizontal state. can be raised and lowered only in the vertical direction. 24(A) and 25(A) show the lift-up state, and FIGS. 24(B) and 25(B) show the lift intermediate state.

Further, as shown in FIG. 26, each lifting device 20 can be modified into a lifting device 200 which is a combination of two-tiered X-link devices.

The hoisting link device 201 of each lifting device 200 is a combination of a lower side link device 210 supported by the frame 12 and an upper side X link device 220 mounted on the lower side link device 210 and supporting the vehicle support base 40. consists of The lower-stage side link device 210 has two links 211 and 212 that are pin-connected in an X shape. is slidably supported by a slidable support 14 provided on the frame 12 . The upper-stage X-link device 220 has two links 221 and 222 that are pin-connected in an X-shape. The upper end of the link 212 is pivoted, the vehicle support 40 is pivotally supported by the upper end of the link 221 , and the vehicle support 40 is slidably supported by the upper end of the link 222 .

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

As a result, the hoisting link devices 201 of each lifting device 200 are displaced along the left-right direction Y perpendicular to the entering direction X of the vehicle 1, and the vehicle support base 40 is brought into a horizontal state. It can be maintained and raised and lowered only in the extension direction. FIG. 26(A) shows a lift-up state, FIG. 26(B) shows a lift initial stage, and FIG. 26(C) shows a lift-down state (lift standby stage).

Therefore, according to this embodiment, the following effects are obtained.
(a) Each lifting device 20 has a movable pit cover 50 attached to the second sub-link 32S, which is a constituent link of the hoisting link device 30, so as to be able to accompany the hoisting link device 30. The cover 50 closes the sub-opening 11B, which is another part of the opening 11 of the pit 10 that is not covered by the vehicle support 40 when the vehicle support 40 is positioned on the lift-down position side. Therefore, in an attempt to reduce the area covered by the vehicle support base 40 positioned at the lift-up position to cover the lower surface of the vehicle to improve maintenance workability, or to achieve a lighter and more compact vehicle lift device, the vehicle support base 40 has been developed. A movable pit cover 50 closing the sub-opening 11B of the pit 10 closes the main opening 11A of the pit 10 when the vehicle support table 40 is positioned on the side of the lift-down position while the platform 40 is downsized. Along with the vehicle support base 40, substantially all of the 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 a vehicle to be serviced. approach road surface to allow the vehicle to enter the maintenance work area.

In addition, in the process in which each vehicle support base 40 is lifted from the lift-down position, the sub-opening 11B of the pit 10 is opened by each movable pit cover 50, and the hoisting link device 30 includes the sub-opening 11B and the main opening 11A. It is made movable in and out of the pit 10 through a relatively large opening 11 of the pit 10.例文帳に追加At this time, the hoisting link device 30 of each lifting device 20 does not require that each link be displaced along the lateral direction Y perpendicular to the entering direction X of the vehicle 1. It may be performed along a direction along the approach direction X of 1.

That is, each lifting device 20 can be transformed into a lifting device 300 composed of a combination of two-stage X-link devices, as shown in FIG. 27, for example.

The hoisting link device 301 of each lifting device 300 is a combination of a lower side link device 310 supported by the frame 12 and an upper side X link device 320 mounted on the lower side link device 310 and supporting the vehicle support base 40. consists of The lower-stage side link device 310 has two links 311 and 312 that are pin-connected in an X shape. is slidably supported by a slidable support 14 provided on the frame 12 . The upper-stage X-link device 320 has two links 321 and 322 that are pin-connected in an X-shape. The upper end of the link 312 is pivoted, the vehicle support 40 is pivotally supported by the upper end of the link 321 , and the vehicle support 40 is slidably supported by the upper end 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 second sub-link 32S of the hoisting link device 30 of the first embodiment.

As a result, the hoisting link devices 301 of each lifting device 300 are displaced along the entering direction X of the vehicle 1 . FIG. 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 table 40 of each lifting device 20 is equipped with a swivel arm 42 that can lift the lower surface of the vehicle that has entered the vehicle maintenance work area and stopped, and each lifting device 20 is equipped with the vehicle support table 40. A lift standby phase in which the vehicle support base 40 is positioned at the lift-down position, and a lift initial phase in which the vehicle support base 40 starts to rise from the lift-down position and the swing arm 42 can swing against 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 hoisting action of the hoisting link device 30, and each lifting device 20 lifts the vehicle support base 40 above the initial lift stage. In stages, the movable pit cover 50 is attached to the constituent links of the luffing linkage 30 such that the movable pit cover 50 follows the luffing linkage 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 above-described approach road surface (a) for the vehicle to be serviced. Meanwhile, the swivel arm 42 of the vehicle support base 40 can be raised to a level above the opening 11 of the pit 10 and set to a swivelable level with respect to the lower surface of the vehicle. This means that each time a plurality of vehicles are successively entered into the maintenance work area and the maintenance work thereof 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 swing arm 42 is lowered to a swingable level without lowering to the above-mentioned level, the previous vehicle can be made to leave the maintenance work area, and the next vehicle can be made to enter the maintenance work area. It can improve work productivity.

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

(d) Each lifting device 20 has a movable plate 60 attached thereto, which moves when the movable pit cover 50 of each lifting device 20 moves upwardly away from the sub-opening 11B of the pit 10. The pit closing position is set to block at least part of the portion 11B. As a result, when the vehicle support base 40 is lifted from the lift-down position, the movable plate 60 closes the sub-opening 11B of the pit 10, which allows the hoisting link device 30 to move out of the pit 10. Above 60 a working floor can be formed for workers.

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

(f) Each lifting device 20 pivotally supports the lower end of the first link 31 on the rotation support 13 provided on the frame 12 inside the pit 10, and slides it on the frame 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 connected to the intermediate link 33 together with the second link 32 , and the upper end of the second link 32 is connected to the vehicle support base 40 . Both ends of the first sub-link 31S are pivotally connected to the base 12 and the intermediate link 33, and the four joints of the first link 31, the first sub-link 31S, the base 12 and the intermediate link 33 form a parallelogram link. Forming the mechanism 20A, both ends of the second sub-link 32S are pivotally attached to the vehicle support base 40 and the intermediate link 33, so that the second link 32, the second sub-link 32S, the vehicle support base 40 and the intermediate link 33 are connected. The movable pit cover 50 of (a) above can be attached to the second sub-link 32S when the joints are configured to form the parallelogram linkage 20B.

In addition, this invention discloses the following vehicle lift apparatuses further regarding embodiment of this invention mentioned above.
<1> In the hoisting link device 30 of each lifting device 20, each link is displaced along the left-right direction perpendicular to the approach direction of the vehicle 1, and as shown in FIGS. 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 left and right directions without splitting the crotch. be able to.

<2> In the hoisting link device 30 of each lifting device 20, each link is displaced along the horizontal direction perpendicular to the entering direction of the vehicle 1. As shown in FIG. 18(A) to 18(C), each hoisting link device 30 can stand in a wide range extending from the outside to the inside in the vehicle width direction immediately 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 linker constituting each link) can be reduced. The overall size of the hoisting link device 30 can be made compact. This reduces the installation space for the hoisting link device 30 in the maintenance work area, and as shown in FIGS. This means that maintenance workability can be improved.

<3> In the hoisting link device 30 of each lifting device 20 , each link is displaced along the left-right direction perpendicular to the entering direction of the vehicle 1 . 3 and 20, each hoisting link device 30 is arranged only directly below the central portion sandwiched between the front wheel side and the rear wheel side along the vehicle longitudinal direction of the vehicle 1 to be lifted. As shown in (A), wide maintenance work spaces 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. As shown in FIG. Therefore, it is possible to improve the maintenance workability of the engine, underbody, transmission, battery, etc. located on the front wheel side and the rear wheel side of the vehicle 1 .

<4> In the hoisting link device 30 of each lifting device 20, each link is displaced along the horizontal direction orthogonal to the entering direction of the vehicle 1. As shown in FIG. Therefore, the hoisting link devices 30 are arranged point-symmetrically to each other and can be shared with each other, and the vehicle support base 40 can be shared with each other. etc., the productivity of the vehicle lift device can be improved.

In addition, each lifting device 20 has no directivity in the direction in which the vehicle enters, and the maintenance work can be performed by entering the vehicle 1 from either of the two directions along the direction in which the vehicle enters.

<5> The hoisting link device 30 of each lifting device 20 includes a first link 31 pivotally supported by the rotation support portion 13 near one side along the left-right direction of the pit 10, and the other side along the left-right direction of the pit 10. and a second link 32 slidably supported by the sliding support portion 14 on the side. Therefore, each hoisting link device 30 has two links, that is, a first link 31 that hoists on the outer side along the vehicle width direction directly below the lift target vehicle 1 in the maintenance work area, and a second link 32 that hoists on the inner side. As a result, the vehicle 1 can be lifted while stably standing in a wide range along the vehicle width direction immediately below the link target vehicle 1, and the aforementioned <2> can be stably realized.

<6> When the vehicle support table 40 rises from the opening 11 of the pit 10, each lifting device 20 provides a work floor surface blocked by the movable plate 60 at the central portion of the opening sandwiched between the lifting devices 20 on both sides. can be formed. A worker can perform maintenance work on a wide work floor formed by the front and rear existing work floors in the pit 10 and the work floor 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 intersection of the first and second links 31 and 32 is positioned above the existing front and rear work floor surfaces, As shown in FIGS. 1 and 2, the lower edge portions below the intersection of the first and second links 31 and 32 are sandwiched between each other, and formed directly below the intersection and above the working floor surface. The triangular inter-link gaps R that are formed face the work floor surfaces in front and behind them. During the descent of the lifting device 20 in which the triangular inter-link gap R is contracted, the operator does not stay under the descending vehicle 1, and his or her foot is placed in the inter-link gap R which is contracted and displaced. It is possible to eliminate the risk of pinching.

<8> Each link constituting the hoisting link device 30 of each lifting device 20 is composed of an assembly of two linkers forming a pair (for the first link 31, a set of two link plates 31P and 31P), As shown in FIG. 21A, each of the two linkers forming each link in the left lifting device 20 and each of the two linkers forming each link in the right lifting device 20 are staggered. are arranged so as to overlap each other. Therefore, the area occupied by both lifting devices 20 in the maintenance space can be reduced. As a result, the earthwork area of the maintenance field can be reduced, and the area of the pit 10 can also be reduced.

Incidentally, in the conventional example shown in FIG. 19, the area of the dirt work area and the pit in the maintenance field is increased as shown in FIG. 21(B) or (C).

<9> Each lifting device 20 has a movable pit cover 50 attached to a constituent link of the hoisting link device 30 so as to be able to accompany the hoisting link device 30, and the movable pit cover 50 of each lifting device 20 is When the vehicle support base 40 is positioned at the lift-down position, part of the opening 11 of the pit 10 that is not covered by the vehicle support base 40 is blocked. At this time, the movable pit cover 50 closes substantially the entire opening 11 of the pit 10 together with the vehicle support base 40 to form a walking surface for workers and an approach road surface for the vehicle 1 to be serviced. The vehicle 1 can enter 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 lifted to the lift-up position. , wide maintenance work spaces W1 and W2 that are not obstructed by the movable pit cover 50 are secured immediately below the lift target vehicle 1.

<10> Each lifting device 20 pivotally supports the lower end of the first link 31 on the rotation support portion 13 provided on the pedestal 12 inside the pit 10, and slides provided on the pedestal 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 by the supporting portion 14, and the upper end of the first link 31 is pivotally connected to the intermediate link 33 together with the middle point 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 sub-link 31S having the same length as the first link 31 are pivotally attached to the base 12 and the intermediate link 33, A parallelogram link mechanism 20A is formed by four joints of the first link 31, the first sub-link 31S, the base 12 and the intermediate link 33. Both ends of the second sub-link 32S are pivoted to form a parallelogram link mechanism 20B with the four joints of the second link 32, the second sub-link 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 moved up and down only in the vertical direction. Also, the movable pit cover 50 of <9> can be attached to the second sub-link 32S.

As described above, the embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration of the present invention is not limited to this embodiment. Included in the present invention.

According to the present invention, in a dual-use lift device, a relatively large opening of the pit is provided to allow the hoisting link device and the vehicle support base to move inside and outside the pit while miniaturizing the vehicle support base of each lifting device. It is possible to reliably block the vehicle support base when it is lifted down.

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

Claims (5)

A pit is provided in the maintenance work area defined on the floor of the maintenance field, and a pair of lifting devices are stored inside the pit,
Each lifting device has a hoisting link device consisting of a plurality of links, and a vehicle support base for supporting a vehicle is mounted on the top of the hoisting link device,
Each lifting device enables the hoisting link device and the vehicle support base to move in and out of the pit through the opening of the pit provided at the same level as the floor of the maintenance area, and the vehicle support base is part of the opening of the pit. A vehicle lift device capable of moving up and down between a lift-down position in which a main opening is positioned to close the main opening and a lift-up position in which a vehicle support base is positioned above a pit,
each lifting device has a respective movable pit cover attached to a constituent link of the luffing linkage so that it can accompany the luffing motion of the luffing linkage;
The movable pit cover of each lifting device covers a sub-opening that is another part of the opening of the pit that is not covered by the vehicle support when the vehicle support is positioned on the side of the lift-down position, A lift device for a vehicle that opens a sub-opening of a pit and allows the hoisting link device to move out of the pit through the sub-opening and the main opening in the process of raising the vehicle support base from the lift-down position. ,
A lift device for a vehicle, wherein the movable pit cover of each lifting device is separated from the opening level of the pit when the vehicle support base of each lifting device is positioned at the lift-up position. A swivel arm is provided so that the vehicle support base of each lifting device can lift the lower surface of the vehicle that has entered the vehicle maintenance work area and stopped,
A lift standby stage in which each lifting device positions the vehicle support base at the lift-down position, and the vehicle support base starts to rise from the lift-down position, allowing the swing arm to swing against the vehicle underside at a level above the opening of the pit. between the lift initial stage, the movable pit cover is maintained at the opening level of the pit without being accompanied by the hoisting action of the hoisting link device, and each lifting device raises the vehicle support platform above the initial lift stage. 2. The vehicle according to claim 1, wherein the movable pit cover is attached to the constituent links of the hoisting link device so that the movable pit cover accompanies the hoisting action of the hoisting link device with a certain delay. lift device. The movable pit cover of each lifting device is attached to the constituent link of the hoisting link device through the elongated hole, and is movable relative to the constituent link within the range of the elongated hole of the elongated hole. 3. The vehicle lift device according to 2. each lifting device having a movable plate associated with it,
The movable plate is set at a pit closing position that closes at least a portion of the sub-opening of the pit when the movable pit cover of each lifting device is separated upward from the sub-opening of the pit, and the movable pit cover moves over the sub-opening of the pit. 4. The vehicle lift device according to any one of claims 1 to 3, wherein the lift device is set to an in-pit storage position in which the lift device is stored inside the pit when closing the pit. Each lifting device,
The lower end of the first link is pivotally supported by a rotation support provided on a frame inside the pit, the lower end of the second link is slidably supported by a sliding support provided on a frame inside the pit, and the second link is supported by a sliding support. 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 base,
Both ends of the first sub-link are pivotally attached to the base and the intermediate link to form a parallelogram link mechanism with four joints of the first link, the first sub-link, the base and the intermediate link,
Both ends of the second sub-link are pivotally attached to the vehicle support base and the intermediate link so that the four joints of the second link, the second sub-link, the vehicle support base and the intermediate link form a parallelogram link mechanism. is,
5. The vehicle lift device according to claim 1, wherein a movable pit cover is attached to the second sub-link.

Images