JP6431382B2 - Vehicle lift device - Google Patents

Description

The present invention relates to a vehicle lift device .

  In general, in a lift for vehicle maintenance, an elevating device is provided in a pit recessed in the floor of a maintenance area, and a lift table mounted on an X link mechanism constituting the elevating device is raised and lowered. When the lift table is positioned at the lift-down position, which is the lowest position for raising and lowering, the lift table is positioned at the opening of the pit to close the opening so that the lift table is flush with the floor of the maintenance area. . On the other hand, when the lift table is lifted from the opening of the pit, if the opening of the pit is opened to the work space of the maintenance shop, there is a risk that maintenance workability may be hindered, such as an operator dropping his foot into the opening. is there.

  Therefore, as a vehicle lift device capable of closing the opening when the lift table is lifted from the opening of the pit, the one described in Patent Document 1 has been proposed. This vehicle lift device includes a pit cover. This pit cover is set in a pit closed position that closes the opening when the lift table is lifted from the pit opening, and is stored in the pit when the lift table is lowered to the lift down position. Set to position. At this time, the pit cover is notched with a small opening through which the peripheral portion of the intersection of the first and second links of the X link mechanism is inserted and exited.

Japanese Patent No. 5268089

  In the vehicle lift device described in Patent Document 1, when the lift table is lifted from the pit opening, the pit cover is set at the pit closing position to close the pit opening, and the pit cover is in contact with the floor surface of the maintenance area. I try to make one.

  However, the pit cover is notched with a small opening through which the peripheral portion of the intersection of the first and second links is inserted and exited, and the first and second are lifted when the lift table is lifted from the pit opening. When the link goes through the small opening of the pit cover and faces the external space of the pit, the small opening of the pit cover is opened to the work space of the maintenance shop. For this reason, there is a possibility that an operator's foot or an object moving under the lift table and over the pit cover from the lower part to the periphery of the vehicle may fall into a small opening of the pit cover. In addition, it is difficult to improve the maintenance work environment because the work cart is placed in a wide range on the pit cover and the wide range on the pit cover cannot be used as an effective work range.

An object of the present invention is to reduce the size of the pit cover through which the first and second link portions positioned below the intersection of the first and second links constituting the X link mechanism of the vehicle lift device are inserted and exited. The purpose is to make the opening as small as possible .

According to the first aspect of the present invention, a pit is provided on the floor of the maintenance area, the lower end portion of the first link of the lifting device is pivotally supported by the rotation support portion provided inside the pit, and the lower end portion of the second link is provided. An X link mechanism is constructed in which a slide support portion provided inside the pit is slidably supported and the two links are connected by an X-shaped intersection, and the lift table mounted on the X link mechanism is attached to the pit. It can be moved up and down between a lift-down position that is positioned at the opening and closes the opening, and a lift-up position that is positioned above the pit, and is set to a pit closing position that closes the opening when the lift table rises from the opening of the pit. And a pit cover that is set in a pit storage position that is stored inside the pit when the lift table is lowered to the lift down position. In the first and notched vehicle lifting device comprising a small opening that the second link portion and out is inserted located below the intersection of the second link, each of the first and second links, the lift In the prone state where the table is positioned at the lift down position, it faces the space above the pit, and when the lift table is lifted from the opening of the pit, it passes through the small opening of the pit cover and faces the external space of the pit. The upper edge part of the part sandwiched between the lower end part and the intersection part of those links is made into a concave shape recessed closer to the bottom surface of the pit than the straight line connecting the lower end part and the intersection part of those links. is there.

According to a second aspect of the present invention, in the first aspect of the invention, the lower end portion of the first shutter is pivotally supported at the opening edge near the rotation support portion provided inside the pit in the small opening of the pit cover. The first shutter is provided along the upper edge of the first link facing the external space of the pit through the small opening of the pit cover in the process of raising the lift table from the opening of the pit, The lower edge of the second shutter is pivotally supported at the opening edge near the sliding support provided inside the pit, and the second shutter opens the small opening of the pit cover in the process of raising the lift table from the opening of the pit. It is provided along the upper edge of the second link passing through and facing the external space of the pit.

  According to a third aspect of the present invention, in the second aspect of the invention, the lifting device further includes a cylinder device that expands and contracts the X link mechanism, and the first shutter is leaned against the first link or the cylinder of the cylinder device. This is provided along the upper edge of the first link, and the second shutter is attached to the upper edge of the second link by leaning against the second link or the cylinder of the cylinder device. It is.

The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein at least one lower end portion of the first and second links is provided at a position spaced upward from the bottom surface of the pit. It is supported by a rotation support part or a sliding support part.
The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein each of the first and second links that are in a prone state by positioning the lift table in a lift-down position, At least the middle portion of the lower edge facing the bottom surface of the pit at the portion sandwiched between the lower end portion and the intersection portion of the link is made to follow the bottom surface of the pit.
The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the lower edges of the first and second links are pit covers with the lift table positioned at the lift-up position. When a gap between links is formed on the upper side of the pit cover, a gap covering plate that covers the gap between links from the side is provided on the pit cover.
The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the pit cover is interlocked with the lifting and lowering operation of the lift table by the lifting device, and between the pit closing position and the pit storage position. It is intended to move.

(Claim 1)
(a) The contour of the upper edge of the first and second links constituting the X link mechanism sandwiched between the lower end and the intersection is more pit than the straight line connecting the lower end of the link and the intersection. It becomes a concave shape that is recessed near the bottom.

  Therefore, when the lift table is lifted from the opening of the pit, the position where the concave upper edge of the first link crosses the pit cover is a straight line connecting the lower end of the first link and the intersection. It is separated from the side of the rotation support portion for the first link provided inside the pit rather than a position crossing the pit cover. This is because the upper edge portion of the first link extends along a straight line connecting the lower end portion and the intersection portion described above, and compared with the case where a conventional link that does not form a concave shape is used. This means that the front opening edge near the rotation support part in the small opening of the pit cover through which the upper edge part forming the concave shape of one link passes can be moved to the far side from the rotation support part.

In addition, when the lift table is lifted from the opening of the pit, the position where the concave upper edge of the second link crosses the pit cover is a straight line connecting the lower end of the second link and the intersection. than the position that traverse the pit cover, away from the side of the sliding support for the second link provided in the interior of the pit. This is because the upper edge portion of the second link extends along a straight line connecting the lower end portion and the intersection portion, and the second link does not have a concave shape. It means that the rear opening edge portion near the sliding support portion in the small opening of the pit cover through which the upper edge portion forming the concave shape of the two links passes can be moved away from the sliding support portion.

That is, in the small opening of the pit cover, the front opening edge near the rotation support portion of the pit cover through which the upper edge portion of the first link passes can be moved to the rear side far from the rotation support portion, and the second The rear opening edge portion near the sliding support portion of the pit cover through which the upper edge portion of the link passes can be moved to the front side far from the sliding support portion. Therefore, the small opening of the pit cover is such that the front opening edge near the rotation support portion of the pit cover and the rear opening edge near the sliding support portion of the pit cover are brought close to each other and can be made as small as possible . Accordingly, it is possible to reduce the chance that an operator's feet or objects moving through the pit cover under the lift table and moving from the lower part to the periphery of the vehicle fall into the small opening of the pit cover. In addition, a work cart can be placed over a wide area on the pit cover so that the wide area on the pit cover can be used as an effective work area, and the maintenance work environment can be improved.

(Claim 2)
(b) A first shutter pivotally supported at the front opening edge near the rotation support portion in the small opening of the pit cover that is opened to the work space of the maintenance area when the lift table is lifted from the opening of the pit. The upper edge of the first link that passes through the small opening of the pit cover and faces the outer space of the pit is provided. As a result, the first shutter covers the open area of the small opening of the pit cover to the external space from the front opening edge near the rotation support part to the rear side in the plan view of the pit cover, and the external space The open area of the exposed small opening can be reduced as much as possible.

  The second shutter pivotally supported on the rear opening edge near the sliding support portion in the small opening of the pit cover that is opened to the work space of the maintenance work place when the lift table is lifted from the opening of the pit. Is provided along the upper edge of the second link passing through the small opening of the pit cover and facing the external space of the pit. Thus, the second shutter covers the open area of the small opening of the pit cover to the external space from the rear opening edge near the sliding support portion in the plan view of the pit cover to the front side. The open area of the small opening exposed to the can be reduced as much as possible.

(Claim 3)
(c) Since the first shutter is leaned against the first link or the cylinder of the cylinder device, the first shutter can be easily provided along the upper edge of the first link, and for the first shutter A separate drive source is not required.
Further, since the second shutter is leaned against the second link or the cylinder of the cylinder device, the second shutter can be easily provided along the upper edge portion of the second link, and driving for the second shutter is performed. No separate source is required.

(Claim 4)
(d) At least one lower end portion of the first and second links is supported by a rotation support portion or a slide support portion provided at a position spaced upward from the bottom surface of the pit. As a result, the first or second link can be greatly curved so that the middle part of the portion sandwiched between the lower end part and the intersecting part is close to the bottom surface of the pit, and the upper edge portion is close to the bottom surface of the pit. It can be a concave shape that is greatly recessed.

In addition, the rotation support portion and the sliding support portion that support the lower ends of the first and second links are arranged higher than the bottom surface of the pit where water, dust, etc. easily collect, and the operating reliability of the lifting device Can be improved.
(Claim 5)
(e) The lower edge part where each of the first and second links, which are in the prone state with the lift table positioned at the lift-down position, faces the bottom surface of the pit in the part sandwiched between the lower end part and the intersection part of those links At least an intermediate portion of the pit is made to follow the bottom surface of the pit. That is, the contour of at least the middle part of the lower edge of the portion sandwiched between the lower end and the intersection of the first and second links bulges as much as possible toward the outside of the links. Therefore, the lower edge portions of the first and second links are sandwiched, and the gap between the links formed immediately below the intersection and on the upper side of the pit cover can be made as small as possible. As a result, it is possible to avoid the possibility that the operator may pinch objects or feet between the link gaps, and to improve the maintenance work environment.
(Claim 6)
(f) When the lower edges of the first and second links form some inter-link gap on the upper side of the pit cover, the gap covering plate provided on the pit cover covers the inter-link gap from the side. And Thereby, the maintenance work environment can be improved.
(Claim 7)
(g) The pit cover is moved between the pit closing position and the pit storage position in conjunction with the lifting and lowering operation of the lift table by the lifting device. Therefore, a separate drive source for the pit cover is not required.

FIG. 1 is a side view showing a lift-up state of the vehicle lift device. FIG. 2 is a view taken along the line II-II in FIG. FIG. 3 is a perspective view seen from one side of FIG. 4 is a perspective view seen from the other side of FIG. FIG. 5 is a side view showing a lift intermediate state of the vehicle lift device. FIG. 6 is a side view showing a lift-down state of the vehicle lift device. FIG. 7 is a perspective view of FIG. FIG. 8 is a schematic view showing a vertical movement device for the pit cover. 9A and 9B are schematic views in which the pit cover of the vehicle lift device and its vertical movement device are omitted, where FIG. 9A is a schematic view showing a lift-up state, and FIG. 9B is a schematic view showing a lift-down state. is there. FIG. 10 is a schematic diagram in which the pit cover and the vertical movement device of the lift device for a vehicle according to the modification are omitted, (A) is a schematic diagram showing a lift-up state, and (B) is a lift-down state. It is a schematic diagram shown. FIG. 1 is a schematic view in which a pit cover and its vertical movement device of a lift device for a vehicle according to another modification are omitted, (A) is a schematic view showing a lift-up state, and (B) is a lift-down view. It is a schematic diagram which shows a state.

  As shown in FIGS. 1 to 7, the vehicle lift device 10 includes a pair of left and right lifting devices 20, 20 and a pair of lifting devices 20, 20 on each of the left and right pits 12, 12 recessed in the floor 11 of the automobile maintenance yard. The lift table 30 moved up and down by 20 can be stored.

  The elevating device 20 comprises a lower X-side link mechanism 20L by pin-connecting the first and second links 21 and 22 on the lower side crossing in an X shape at the X-shaped crossing portion 20J. The upper and lower third and fourth links 23 and 24 that intersect each other in a pin shape are pin-coupled at an X-shaped intersection 20K to constitute an upper X-link mechanism 20U. The upper end of the first link 21 and the lower end of the fourth link 24 are pin-coupled at a pin coupling point 20P, and the upper end of the second link 22 and the lower end of the third link 23 are pinned at a pin coupling point 20R. By joining, the elevating part 20A connecting the two upper and lower X link mechanisms 20U, 20L is configured.

  Each of the links 21 to 24 of the lifting device 20 is composed of a pair of left and right link plates, and the second to fourth links 22 to 24 are connected to each other by the connecting plate 25. The gap between the left and right link plates is closed. The first link 21 extends a hydraulic cylinder device 26 described later between the left and right link plates.

  The elevating part 20A pivotally supports the lower end pivot point (lower end part) 21A of the first link 21 on the rotation support part 14 provided on the frame 13 inside the pit 12, and the lower end roller (lower end part) of the second link 22 ) 22A is slidably supported by a sliding support portion 15 provided on the mount 13 inside the pit 12 so as to be capable of reciprocating linear movement. The lower end pivot point 21A of the first link 21 is supported by a rotation support portion 14 provided at a position spaced upward from the bottom surface 12B of the pit 12. The rotation support unit 14 is installed on a support base 14 </ b> A raised on the bottom surface 12 </ b> B of the pit 12. The sliding support portion 15 that supports the lower end roller 22A of the second link 22 may also be provided at a position spaced upward from the bottom surface 12B of the pit 12.

  Further, the elevating unit 20 </ b> A pins the upper pivot point (upper end) 24 </ b> A of the fourth link 24 to the main table 31 of the lift table 30, and connects the upper end roller (upper end) 23 </ b> A of the third link 23 to the main table 31. The lift table 30 is mounted so as to be able to move up and down in a horizontal state by being coupled so as to be capable of reciprocating linear movement within the lower surface of the plate.

  The lifting device 20 includes an intermediate portion in the longitudinal direction of the first link 21 (in this embodiment, an intermediate portion sandwiched between the lower end pivot point 21A and the intersecting portion 20J) and an intermediate portion in the longitudinal direction of the fourth link 24 ( In this embodiment, a hydraulic cylinder device 26 that expands and contracts the X link mechanism 20L and the X link mechanism 20U is interposed between the intersecting portion 20K and the intermediate portion between the pin coupling points 20P. The proximal end portion of the cylinder 26 </ b> A of the hydraulic cylinder device 26 is pin-coupled to the intermediate portion of the first link 21, and the distal end portion of the piston rod 26 </ b> B of the hydraulic cylinder device 26 is pin-coupled to the intermediate portion of the fourth link 24.

  The elevating device 20 retracts the X link mechanisms 20L and 20U of the elevating unit 20A up and down and stores them in the pit 12 by the contraction operation of the hydraulic cylinder device 26, and opens the lift table 30 in the plane of the floor surface 11. It is positioned at the opening 12A of the pit 12, and the opening is closed, and the lift table 30 is set at a lift-down position where it is at the same level as the floor surface 11, so that the vehicle can pass through the lift table 30. By extending the hydraulic cylinder device 26, the X link mechanisms 20L and 20U of the elevating unit 20A are extended vertically, and the lift table 30 is set to a lift-up position positioned above the pit 12 to enable vehicle maintenance.

  Here, in the lifting device 20, the center axis of the hydraulic cylinder device 26 (the pin to the first cylinder 21 of the cylinder 26A) is always provided regardless of the position of the lift table 30 from the lift-down position to the lift-up position. A straight line connecting the coupling point and the pin coupling point of the piston rod 26B to the fourth link 24 is inclined with respect to the horizontal.

  The vehicle lift device 10 includes front and rear turning arms 32 on the side of the lift table 30. Each turning arm 32 includes a receiving member 32A that turns from the side of the lift table 30 toward the lower portion of the vehicle and supports the vehicle by contacting a lift point defined on the lower surface of the vehicle.

The vehicle lift device 10 includes a pit cover 40 that closes the opening 12 </ b> A of the pit 12 when the lift table 30 rises from the opening of the pit 12. In the pit cover 40, first and second link portions (lower portions of the intersection portion 20J in this embodiment) located below the intersection portion 20J of the first link 21 and the second link 22 of the lifting device 20 are inserted. The rectangular small opening 40A that is moved in and out is cut out in the center, and is located around the longitudinal intermediate portion of the first link 21 and the second link 22, and the lift table 30 is stored in the pit 12 and placed in a prone state The first link 21 and the second link 22 are extended to a certain range. The pit cover 40 passes the side of the intersection 20J between the first link 21 and the second link 22 in the above-mentioned prone state through the small opening 40A, and both the front and rear sides of the intersection 20J (in this embodiment, the lift table 30). The direction along the longitudinal direction of the pit cover 40 is referred to as the front-rear direction, the rotation support portion 14 provided inside the pit 12 is referred to as the front side, and the slide support portion 15 side is referred to as the rear side). The second link 22 extends deeply into the V-shape of the narrow V-shape space partitioned by the second link 22.

  The frame 41 of the pit cover 40 is supported by the upper end of a compression spring support 42 that is erected at the four corners of the bottom of the pit 12 as shown in FIGS. 1, 5, and 6. When the lifting device 20 lifts the lift table 30 from the opening 12A of the pit 12, as shown in FIGS. 1 to 5, the pit cover 40 is positioned at the opening 12A of the pit 12 and is set at a pit closing position for closing it. . When the lifting device 20 lowers the lift table 30 to the lift-down position and stores it in the pit 12, the pit cover 40 is stored in the pit 12 that is stored in the pit 12 as shown in FIGS. 6 and 7. Set to position.

  In the present embodiment, the pit cover 40 is interlocked with the lowering operation of the lift table 30 by the lifting device 20 by the operation of the vertical movement device 50, compressing the spring support 42, and in the openings 12 </ b> A to 12 of the pit 12. Move down to the stowed position. When the lifting device 20 positions the lift table 30 above the pit 12, the pit cover 40 is moved upward from the storage position in the pit 12 by the spring force of the compression spring support 42 and is positioned at the opening 12 </ b> A of the pit 12. To close the opening 12A.

  As shown in FIGS. 1, 5, 6, and 8, the vertical movement device 50 supports the pit cover 40 by a pedestal 51 made of a toggle link that can be tilted and locked in a standing position. The pedestal 51 is constructed by pin-bonding two folding bars 52 and 53 at a connection point a, and pin-connecting the upper end of the folding bar 52 to the frame 41 of the pit cover 40 at the connection point b. The lower end portion is pin-connected to the mount 13 of the pit 12 at the connection point c. A tension spring constituting an urging means 54 (FIGS. 1, 5, and 6) is stretched between the pedestal 51 and a spring receiver provided on the frame 41 of the pit cover 40, and the urging rod 52 is urged. The concave portion 52A provided on the back surface with respect to the pulling direction by the means 54 and the convex portion 53A provided on the back surface with respect to the pulling direction by the urging means 54 of the folding bar 53 are engaged with each other by the urging force of the urging means 54 to stand. . When the pedestal 51 is in the standing position, the connection point a is positioned on the pulling side of the urging means 54 with respect to the straight line connecting the connection point b and the connection point c, and locks the pedestal 51 made of a toggle link. The vertical movement device 50 closes the opening 12 </ b> A of the pit 12 with the pit cover 40 when the leg pillar 51 stands, and stores the pit cover 40 in the pit 12 when the leg pillar 51 tilts from the above-mentioned standing position.

  The vertical movement device 50 urges the pedestal 51 toward the standing position by the urging means 54 as described above, and the tilting means 55 interlocked with the lowering operation of the lift table 30 to the pit 12 by the elevating device 20. The pedestal 51 is tilted from the above-mentioned standing position against the tensile force of the urging means 54.

  As shown in FIG. 8, the tilting means 55 includes a release lever 55 </ b> A that is swingably provided on the frame 41 of the pit cover 40. In this embodiment, the release lever 55A is pin-coupled to the frame 41 at a connection point b for the folding bar 52 of the pedestal 51. The release lever 55A is interlocked with the lowering operation of the lift table 30 to the pit 12 by the lifting device 20. In this embodiment, the release lever 55A is provided with a push pin 55B at a position having a certain radius from the pin coupling point b to the frame 41, and the push pin 55B is placed in front of the folding bar 52 of the leg column 51 in the standing position. It collides and is positioned at the standby position (FIG. 1). The release lever 55A is pressed by a release roller 56 provided at the intermediate portion of the second link 22 of the lifting device 20 in the process in which the X link mechanism of the lifting unit 20A is vertically contracted, and is given a swinging force. Swing from. The release lever 55A is swung until it hits a swing stopper 57 provided on the frame 41 of the pit cover 40 (FIG. 5). The release lever 55A is a bent bar of the pedestal 51 that is standing up against the spring force of the urging means 54 by the push pin 55B in the process of swinging from the standby position until it hits the swing stopper 57. By pushing 52, a tilting force is applied to the pedestal 51, and the pedestal 51 is tilted. The release lever 55A positions the first link 21 and the second link 22 in the prone state after the X link mechanism of the elevating part 20A is further vertically contracted after the collision of the pit cover 40 with the swing stopper 57 of the frame 41, In the process of storing the lift table 30 in the pit 12, the lift table 30 is further pressed by the release roller 56 of the second link 22 of the lifting device 20. As a result, the release lever 55A applies a pushing force into the pit 12 to the pit 12 via the swing stopper 57 and stores the pit cover 40 in the pit 12 (FIG. 6).

  The vertical movement device 50 supports the pit cover 40 by a total of six pedestals 51 provided at a total of six positions, two positions in the front and rear, and two positions in the middle. Each pedestal 51 is connected by a connecting link 58 that is parallel to the pit cover 40. The connecting link 58 is pin-coupled to a connecting point a between the folding bar 52 and the folding bar 53 of each leg 51. Thereby, the folding rods 52 and 53 of each pedestal column 51 form a parallel link mechanism together with the pit cover 40 and the connecting link 58. The folding rods 52 and 53 of each pedestal 51 are moved in parallel with each other.

Accordingly, the vertical movement of the pit cover 40 by the vertical movement device 50 is performed as follows.
(1) When the lifting device 20 positions the lift table 30 above the pit 12, the pit cover 40 is supported by the pedestal 51 in the standing position and closes the opening 12A of the pit 12 (FIG. 1).

  (2) Since the elevating device 20 stores the lift table 30 in the pit 12, when the X link mechanism of the elevating unit 20A is vertically retracted, the release roller 56 of the second link 22 presses the release lever 55A from the standby position. When it is swung, the push pin 55B of the release lever 55A pushes the folding bar 52 of the leg column 51 in the standing position, and tilts the leg column 51 (FIG. 5).

  (3) When the X link mechanism of the elevating part 20A is further contracted vertically, and the release roller 56 of the second link 22 further swings the release lever 55A, the release lever 55A is provided on the frame 41 of the pit cover 40. It abuts against the moving stopper 57. The release lever 55 </ b> A compresses the compression spring support 42 via the swing stopper 57 and moves the pit cover 40 downward from the opening 12 </ b> A of the pit 12 and pushes it into the pit 12. When the first link 21 and the second link 22 of the elevating unit 20A are positioned in the prone state, the lift table 30 is stored in the opening 12A of the pit 12 and the pit cover 40 is stored in the pit 12 (FIG. 6). ).

  (4) When the lifting device 20 raises the lift table 30 from the opening 12A of the pit 12, the pit cover 40 is biased upward by the spring force of the compression spring support 42, and the swing stopper 57 of the pit cover 40 is moved. It moves upward while abutting against the release roller 56 of the second link 22 of the lifting device 20.

  When the lifting device 20 further raises the lift table 30 and the release lever 55A pressed by the release roller 56 of the second link 22 of the lifting device 20 moves away from the swing stopper 57 of the pit cover 40, the vertical motion device The urging means 54 of 50 pulls the folding bars 52 and 53 of the pedestal 51, and the pedestal 51 is positioned and locked in the standing position. At this time, the pit cover 40 is positioned at the opening 12A of the pit 12 and supported by the pedestal 51, and closes the opening 12A.

Hereinafter, (A) and (B) will be described in detail.
(A) The inter-link gap 100 formed on the upper side of the pit cover 40 is made as small as possible by sandwiching the lower edge portions 110 and 120 of the first and second links 21 and 22 constituting the X link mechanism 20L. Structure to do.

In the vehicle lift device 10, when the lift table 39 is positioned at the lift-up position, as shown in FIG. 9A, the intersection 20J of the first and second links 21 and 22 is the upper surface of the pit cover 40. When arranged at a higher position, the lower edge portions 110, 120 below the intersecting portion 20J of the first and second links 21, 22 are sandwiched, directly below those intersecting portions 20J, and on the pit cover 40. A triangular link gap 100 is formed on the upper side. This inter-link gap 100 is made as small as possible by the following structure.

  That is, in the vehicle lift device 10, the first and second links 21 and 22 in the prone state with the lift table 30 positioned at the lift-down position are as shown in FIG. And ii).

  i) The first link 21 is located in the prone state when the lift table 30 is positioned at the lift-down position, and the pit 12 in the portion sandwiched between the lower pivot point 21A and the intersection 20J of the second link 22 The shape of at least the middle portion of the lower edge portion 110 facing the bottom surface 12B of the pit 12 is made to follow the bottom surface 12B of the pit 12.

  In this embodiment, the bottom surface 12B of the pit 12 forms a horizontal plane. Therefore, the intermediate portion of the lower edge portion 110 in the first link 21 in the prone state with the lift table 30 positioned at the lift-down position is parallel to the bottom surface 12B of the pit 12.

  ii) The bottom surface of the pit 12 at the portion where the second link 22 is sandwiched between the intersection 20J of the lower end roller 22A and the first link 21 when the lift table 30 is positioned at the lift-down position and is in a prone state. The shape of at least the middle portion of the lower edge 120 facing 12B is made to follow the bottom surface 12B of the pit 12.

  In this embodiment, the bottom surface 12B of the pit 12 forms a horizontal plane. Therefore, the intermediate portion of the lower edge portion 120 in the second link 22 in the prone state with the lift table 30 positioned at the lift-down position is parallel to the bottom surface 12B of the pit 12.

  Therefore, according to the vehicle lift device 10, the lower edge portions 110 and 120 of the portion sandwiched between the lower end portions of the first and second links 21 and 22 (the lower end pivot point 21 </ b> A and the lower end roller 22 </ b> A) and the intersection 20 </ b> J. The contour of at least an intermediate portion of the lift table 30 follows the bottom surface 12B of the pit 12 in the lifted down state (parallel to the horizontal bottom surface 12B of the pit 12). As a result, the links 21, It will bulge out as much as possible toward the outside of 22. Therefore, the lower edge portions 110 and 120 of the first and second links 21 and 22 are sandwiched between the link gaps 100 formed immediately below the intersection 20J and above the pit cover 40 as much as possible. Can be small. As a result, it is possible to avoid the possibility that the operator may pinch objects or feet between the link gaps 100, and to improve the maintenance work environment.

  Further, in the vehicle lift device 10, the lower edge portions 110, 120 of the first and second links 21, 22 are connected to the upper side of the pit cover 40 with the lift table 30 positioned at the lift-up position. When the gap 100 was formed, a gap covering plate 130 was provided on the pit cover 40 to cover the inter-link gap 100 from the side.

  As shown in FIGS. 1 and 3, the gap covering plate 130 is fixed to the opening edge portions 41 </ b> A and 41 </ b> B on both the left and right sides of the opening 40 </ b> A by bolting or welding in the pit cover 40. It is composed of a flat plate material (which may be triangular, pentagonal, etc.) covered from

  Therefore, in the lift device 10 for a vehicle, the lower edge portions 110, 110 of the first and second links 21, 22 can also be obtained by the special shape of the lower edges 110, 120 of the first and second links 21, 22. When 120 forms some inter-link gaps 100 on the upper side of the pit cover 40, the gap covering plate 130 provided on the pit cover 40 covers the inter-link gap 100 from the side. Thereby, the maintenance work environment can be improved.

  In the vehicle lift device 10, as described above, the pit cover 40 moves between the pit closed position and the pit storage position in conjunction with the lifting and lowering operation of the lift table 30 by the lifting device 20. Is done. Therefore, a separate drive source for the pit cover 40 is not required.

  In the vehicle lift device 10, as described above, the central axis of the hydraulic cylinder device 26 is always inclined with respect to the horizontal regardless of the position of the lift table 30 from the lift-down position to the lift-up position. Be placed. Therefore, the lower edge portions 110 and 120 of the first and second links 21 and 22 follow the bottom surface 12B of the pit 12 in the prone state of the links 21 and 22 (or parallel to the horizontal bottom surface 12B of the pit 12). The hydraulic cylinder device 26 can always apply the upward component of thrust to the X link mechanisms 20L and 20U, and the lift table 30 can be moved up and down.

(B) A small opening 40A of the pit cover 40 through which the first and second link portions located below the intersection 20J of the first and second links 21 and 22 constituting the X link mechanism 20L are inserted and exited. A structure that makes as small as possible .

  In the vehicle lift device 10, each of the first link 21 and the second link 22 faces the space above the pit 12 in the prone state where the lift table 30 is positioned at the lift-down position (FIG. 9B), and the lift When the table 30 is lifted from the opening 12A of the pit 12, the small openings 40A of the pit cover 40 are inserted and face the external space of the pit 12 (FIG. 9A). The upper edge portions 210 and 220 are concave as shown in i) and ii) below.

  i) The first link 21 has its lower end pivot point (lower end) 21A and the upper edge 210 of the portion sandwiched by the intersection 20J with the second link 22 at the lower end pivot point of the first link 21. A concave shape (recessed portion 210 </ b> A) that is recessed closer to the bottom surface 12 </ b> B of the pit 12 than the straight line 21 </ b> C connecting 21 </ b> A and the intersection 20 </ b> J.

  ii) The second link 22 has a lower edge roller (lower end portion) 22A and an upper edge portion 220 sandwiched by the intersection portion 20J with the first link 21, and the lower link roller 22A of the second link 22 and the intersection portion. A concave shape (recessed portion 220 </ b> A) that is recessed closer to the bottom surface 12 </ b> B of the pit 12 than the straight line 22 </ b> C connecting 20 </ b> J.

  Therefore, according to the vehicle lift device 10, when the lift table 30 is lifted from the opening 12 </ b> A of the pit 12, the position where the upper edge portion 210 forming the concave shape of the first link 21 crosses the pit cover 40 is Rotation support for the first link 21 provided inside the pit 12 rather than a position where the straight line 21C connecting the lower end pivot point (lower end) 21A of the one link 21 and the intersection 20J crosses the pit cover 40. Separated from the part 14 side. This is because the upper edge portion 210 of the first link 21 extends along a straight line 21C that connects the lower end pivot point (lower end portion) 21A and the intersecting portion 20J, and does not have a concave shape. Compared to the case where a link is used, the front opening edge 41F close to the rotation support part 14 in the small opening 40A of the pit cover 40 through which the upper edge part 210 forming the concave shape of the first link 21 faces is provided in the small opening 40A. It means that it can be moved to the far side from the rotation support part 14.

  Further, when the lift table 30 is lifted from the opening 12A of the pit 12, the position of the upper edge 220 forming the concave shape of the second link 22 crossing the pit cover 40 is the lower end roller ( A straight line 22 </ b> C connecting the lower end portion 22 </ b> A and the intersecting portion 20 </ b> J is separated from the side of the sliding support portion 15 for the second link 22 provided inside the pit 12 rather than a position crossing the pit cover 40. This is because the upper edge 220 of the second link 22 extends along a straight line 22C connecting the above-described lower end roller (lower end) 22A and the intersection 20J, and does not have a concave shape. Compared to the case of using, the rear opening edge 41R near the sliding support part 15 in the small opening 40A of the pit cover 40 through which the upper edge part 220 forming the concave shape of the second link 22 passes is provided. It means that it can be moved to the far side from the sliding support part 15.

That is, in the small opening 40A of the pit cover 40, the front opening edge portion 41F near the rotation support portion 14 of the pit cover 40 through which the upper edge portion 210 of the first link 21 passes is located far from the rotation support portion 14. The rear opening edge 41R near the sliding support portion 15 of the pit cover 40 through which the upper edge portion 220 of the second link 22 passes can be moved to the front side far from the sliding support portion 15. Can be relocated. Therefore, the small opening 40A of the pit cover 40 makes the front opening edge 41F near the rotation support portion 14 of the pit cover 40 and the rear opening edge 41R near the sliding support portion 15 of the pit cover 40 close to each other. Can be as small as possible . Accordingly, it is possible to reduce the chance that an operator's foot or an object moving under the lift table 30 over the pit cover 40 from the lower part to the periphery of the vehicle falls into the small opening 40A of the pit cover 40. it can. In addition, by placing a work cart over a wide range on the pit cover 40, the wide range on the pit cover 40 can be used as an effective work range, and the maintenance work environment can be improved.

  Further, the vehicle lift device 10 pivotally supports the lower end portion of the first shutter 211 on the front opening edge portion 41 </ b> F near the rotation support portion 14 provided inside the pit 12 in the small opening 40 </ b> A of the pit cover 40. The first shutter 211 is provided along the upper edge portion 210 of the first link 21 that passes through the small opening 40A of the pit cover 40 and faces the external space of the pit 12 in the process of raising the lift table 30 from the opening 12A of the pit 12. It is done.

  In the present embodiment, the first shutter 211 is leaned against the outer periphery of the cylinder 26 </ b> A in the hydraulic cylinder device 26 extending between the left and right link plates of the first link 21, so that the upper edge portion of the first link 21. 210 is provided. In the process of raising the lift table 30 from the opening 12A of the pit 12, the upper end portion of the first shutter 211 is in sliding contact with the outer periphery of the cylinder 26A in the longitudinal direction, and as a result, the first link 21 provided on both sides of the cylinder 26A. It is provided along the upper edge portions (upper edge portions 210) of the left and right link plates. The first shutter 211 may lean against the upper edge portion 210 of the first link 21.

  Further, the vehicle lift device 10 pivotally supports the lower end portion of the second shutter 221 at the rear opening edge portion 41R near the sliding support portion 15 provided inside the pit 12 in the small opening 40A of the pit cover 40. . The second shutter 221 is provided along the upper edge 220 of the second link 22 that passes through the small opening 40A of the pit cover 40 and faces the external space of the pit 12 in the process of raising the lift table 30 from the opening 12A of the pit 12. It is done.

  In the present embodiment, the second shutter 221 is provided along the upper edge 220 of the second link 22 by leaning against the outer surface of the connecting plate 25 connecting the left and right link plates of the second link 22. In the process of raising the lift table 30 from the opening 12 </ b> A of the pit 12, the upper end portion of the second shutter 221 slidably contacts the outer surface of the connecting plate 25 in the longitudinal direction, and as a result, is provided along the upper edge portion 220 of the second link 22. Become a thing. When the base end portion of the cylinder 26 </ b> A of the hydraulic cylinder device 26 is pin-coupled to the intermediate portion of the second link 22, the second shutter 221 may lean against the outer periphery of the cylinder 26 </ b> A in the hydraulic cylinder device 26.

  Therefore, according to the vehicle lift device 10, when the lift table 30 is lifted from the opening 12 </ b> A of the pit 12, the rotation support portion 14 is close to the small opening 40 </ b> A of the pit cover 40 that is opened to the work space of the maintenance area. The first shutter 211 pivotally supported by the front opening edge 41F is provided along the upper edge 210 of the first link 21 that passes through the small opening 40A of the pit cover 40 and faces the external space of the pit 12. Accordingly, the first shutter 211 covers the open area of the small opening 40A of the pit cover 40 to the external space from the front opening edge 41F near the rotation support portion 14 to the rear in the plan view of the pit cover 40. Thus, the open area of the small opening 40A exposed to the external space can be reduced as much as possible.

  Further, when the lift table 30 is lifted from the opening 12A of the pit 12, the rear opening edge 41R near the sliding support portion 15 in the small opening 40A of the pit cover 40 that is opened to the work space of the maintenance work place. A pivotally supported second shutter 221 is provided along the upper edge 220 of the second link 22 that passes through the small opening 40A of the pit cover 40 and faces the external space of the pit 12. As a result, the second shutter 221 covers the open area of the small opening 40A of the pit cover 40 to the external space from the rear opening edge 41R closer to the sliding support 15 in the plan view of the pit cover 40. Therefore, the open area of the small opening 40A exposed to the external space can be reduced as much as possible.

  In addition, according to the vehicle lift device 10, the first shutter 211 is easily leaned against the first link 21 or the cylinder 26 </ b> A of the hydraulic cylinder device 26, so that the first shutter 211 can be easily connected to the upper edge of the first link 21. It can be provided along with the unit 210 and does not require a separate driving source for the first shutter 211.

  Further, the second shutter 221 can be easily provided along the upper edge of the second link 22 by leaning against the second link 22 or the cylinder 26A of the hydraulic cylinder device 26, and A separate driving source for the second shutter 221 is not required.

  In the vehicle lift device 10, as described above, at least one lower end (the lower end pivot point 21 </ b> A or the lower end roller 22 </ b> A) of the first and second links 21 and 22 is the bottom surface 12 </ b> B of the pit 12. It is supported by the rotation support part 14 or the sliding support part 15 provided in the position spaced apart upward. The lower end pivot point 21A of the first and second links 21, 22 and the height A at which the lower end roller 22A (lower end) is separated upward from the bottom surface 12B of the pit 12 are stored in the pit 12 in a lift-down state. The intersection 20J of the first and second links 21 and 22 is set to be equal to or higher than the height B formed with respect to the bottom surface 12B of the pit 12 (A> B in this embodiment) (FIG. 9B )).

  As a result, the first or second link 21, 22 is arranged so that the intermediate portion of the portion sandwiched between the lower end (the lower end pivot point 21 </ b> A or the lower end roller 22 </ b> A) and the intersection 20 </ b> J is close to the bottom surface 12 </ b> B of the pit 12. The upper edge portions 210 and 220 can be formed in a concave shape that is largely recessed toward the bottom surface of the pit.

  Moreover, the rotation support part 14 and the sliding support part 15 which support the lower end part (lower end pivot point 21A or the lower end roller 22A) of the 1st and 2nd links 21 and 22 are made into the pit 12 where water, dust, etc. tend to accumulate. Therefore, the operation reliability of the lifting device 20 can be improved.

  The vehicle lift device 10 shown in FIG. 10 is different from the vehicle lift device 10 shown in FIGS. 1 to 9 in that the elevating unit 20A of the elevating device 20 is composed only of the lower X-link mechanism 20L. The lift table 30 is mounted directly on the link mechanism 20L.

Even in the vehicle lift device 10 of FIG. 10, each of the first and second links 21 and 22 in the prone state with the lift table 30 positioned at the lift-down position, as in the case of (A) described above, At least the middle part of the lower edge portions 110 and 120 facing the bottom surface 12B of the pit 12 sandwiched between the lower end pivot point 21A of the links 21 and 22 and the lower end roller 22A (lower end portion) and the intersection 20J 12 is made to follow the bottom surface 12B of 12 (or parallel to the horizontal bottom surface 12B of the pit 12). Thereby, the lower edge portions 110 and 120 of the first and second links 21 and 22 are sandwiched, and the inter-link gap 100 formed on the upper side of the pit cover 40 is made as small as possible . In the example of FIG. 10A, the inter-link gap 100 is not generated.

Also in the vehicle lift device 10 of FIG. 10, the lower end pivot point 21A of the first and second links 21, 22 and the lower end roller 22A (lower end portion) and the intersection are the same as in the above (B). The upper edge portions 210 and 220 of the portion sandwiched between 20J and the lower end pivot point 21A of the links 21 and 22 and the straight line 21C and 22C connecting the lower end roller 22A (lower end portion) and the intersecting portion 20J, A concave shape (recessed portions 210A and 220A) is formed to be recessed toward the bottom surface 12B. Thereby, the small opening 40A of the pit cover 40 through which the first and second link portions positioned below the intersection 20J of the first and second links 21 and 22 are inserted and exited is made as small as possible. .

The vehicle lift device 10 shown in FIG. 11 differs from the vehicle lift device 10 shown in FIGS. 1 to 9 in that the lower end pivot point 21A of the first and second links 21 and 22 and the lower end roller 22A ( The lower end portion is supported by each of the rotation support portion 14 and the slide support portion 15 provided on the bottom surface 12B of the pit 12 (the rotation support portion 14 and the slide support portion 15 are provided on the pit 12). It is not installed on a support stand (14A or the like) raised from the bottom surface 12B, and is not provided at a position spaced apart from the bottom surface 12B of the pit 12). Even in the vehicle lift device 10 of FIG. 11, the inter-link gap 100 formed on the upper side of the pit cover 40 with the lower edges 110 and 120 of the first and second links 21 and 22 sandwiched as much as possible is possible. Make it smaller . Further, the small opening 40A of the pit cover 40 through which the first and second link portions positioned below the intersection 20J of the first and second links 21 and 22 are inserted and exited is made as small as possible . In the example of FIG. 11A, the inter-link gap 100 is not generated.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.

According to the present invention, the small pit cover that is inserted and exited through the first and second link portions positioned below the intersection of the first and second links constituting the X link mechanism of the vehicle maintenance lift. The opening can be made as small as possible .

DESCRIPTION OF SYMBOLS 10 Vehicle lift apparatus 11 Floor surface 12 Pit 12A Opening 12B Bottom surface 14 Rotation support part 14A Support stand 15 Sliding support part 20 Lifting apparatus 20A Lifting part 20L, 20U X link mechanism 20J, 20K Crossing part 21 1st link 21A Lower end pivot Landing point (lower end)
21C, 22C Straight line 22 Second link 22A Lower end roller (lower end)
23 Third link 24 Fourth link 26 Hydraulic cylinder device 26A Cylinder 30 Lift table 40 Pit cover 40A Small opening 41F Front opening edge 41R Rear opening edge 210, 220 Upper edge 210A, 220A Recess 211 First shutter 221 First 2 shutters

Claims (7)

A pit is provided on the floor of the maintenance area, the lower end of the first link of the lifting device is pivotally supported by a rotation support provided in the pit, and the lower end of the second link is provided in the pit. An X-link mechanism is formed which is slidably supported by a support part, and both of these links are connected by an X-shaped intersection, and a lift table mounted on the X-link mechanism is positioned at the opening of the pit to close the opening. It is possible to move up and down between the lift-down position and the lift-up position positioned above the pit,
When the lift table is lifted from the pit opening, it is set to a pit closing position that closes the opening, and when the lift table is lowered to the lift down position, it is set to a pit storage position that is stored inside the pit. Have a pit cover,
The pit cover is a lift device for a vehicle in which a small opening through which the first and second link portions located below the intersection of the first and second links of the X link mechanism are inserted and exited is cut out.
Each of the first and second links faces the space above the pit in the prone state where the lift table is positioned at the lift-down position, and passes through the small opening of the pit cover when the lift table is lifted from the opening of the pit. The upper edge of the portion sandwiched between the lower end of the links and the intersection that faces the outer space of the pit is closer to the bottom of the pit than the straight line connecting the lower end of the links and the intersection. A lift device for a vehicle, characterized in that it has a concave shape that is recessed. In the small opening of the pit cover, the lower end of the first shutter is pivotally supported on the opening edge near the rotation support provided in the pit,
The first shutter is provided along the upper edge of the first link that passes through the small opening of the pit cover and faces the external space of the pit in the process of raising the lift table from the opening of the pit,
In the small opening of the pit cover, the lower end of the second shutter is pivotally supported at the opening edge near the sliding support provided inside the pit,
2. The vehicle according to claim 1, wherein the second shutter is provided along an upper edge portion of the second link that passes through the small opening of the pit cover and faces the external space of the pit in the process of raising the lift table from the opening of the pit. Lift device. The lifting device has a cylinder device for expanding and contracting the X-link mechanism;
The first shutter is attached to the upper edge of the first link by leaning against the first link or the cylinder of the cylinder device,
The vehicle lift device according to claim 2, wherein the second shutter is provided along the upper edge portion of the second link by leaning against the second link or a cylinder of the cylinder device.   The lower end portion of at least one of the first and second links is supported by a rotation support portion or a slide support portion provided at a position spaced upward from the bottom surface of the pit. The lift apparatus for vehicles as described.   Each of the first and second links in the prone state with the lift table positioned at the lift-down position has at least a lower edge portion facing the bottom surface of the pit between the lower end portion and the intersection portion of the links. The vehicle lift device according to any one of claims 1 to 4, wherein the intermediate portion is made to follow the bottom surface of the pit.   When the lift table is positioned at the lift-up position, when the lower edge portions of the first and second links form a gap between the links on the upper side of the pit cover, the gap covering that covers the gap between the links from the side The vehicle lift device according to claim 1, wherein the plate is provided on the pit cover.   The vehicle lift device according to any one of claims 1 to 6, wherein the pit cover moves between a pit closing position and a pit storage position in conjunction with the lifting and lowering operation of the lift table by the lifting device.

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