JP6818370B2 - Vehicle maintenance lift - Google Patents

Description

The present invention relates to a vehicle maintenance lift provided with a movable pit cover attached to a link of an elevating mechanism.

Conventionally, there is a pedestal on which a vehicle is placed and an elevating mechanism that raises and lowers the pedestal provided at the upper end by opening and closing a link mechanism formed by crossing and connecting a plurality of links in a λ or X shape. However, at the lower limit of the pedestal, a vehicle maintenance lift is used in which the elevating mechanism is recessed in the floor surface and stored in the pit. Such a vehicle maintenance lift makes the cradle as small as possible so as not to interfere with the maintenance work, while the link mechanism that constitutes the elevating mechanism is large enough to secure the height and strength when ascending. is necessary. Therefore, when the elevating mechanism is stored in the pit with the pedestal in the lower limit state, a part of the pit opening surface is closed by the pedestal, but an opening portion that is not closed may occur in the other part.

In view of these points, a movable pit cover is conventionally installed in the middle of the height direction of the link, which is a part of the elevating mechanism, and when the link is tilted and the pedestal is in the lower limit position, the opening is not closed by the pedestal. A vehicle maintenance lift has been proposed in which the part is closed by a movable pit cover.

JP-A-2018-203382

However, in the above-mentioned conventional technique, since the movable pit cover is attached in the middle in the height direction of the link, the operator moves up and down at a speed different from that of the pedestal at the upper end on which the vehicle is placed. Careful attention must be paid to the position and movement of the movable pit cover so as not to pinch your hands between the cover and the movable pit cover and the fixed pit cover.

An object of the present invention is to provide a vehicle maintenance lift with improved safety of a movable pit cover provided on a link of an elevating mechanism.

The vehicle maintenance lift (1) according to the present invention has a link mechanism in which a pedestal (3) on which a vehicle is placed and a plurality of links (12, 14) are crossed and connected in a λ or X shape. It has an elevating mechanism (10) that raises and lowers the pedestal provided at the upper end by opening and closing, and the mounting surface of the pedestal is flush with the floor surface (F) at the lower limit position of the pedestal. As described above, the floor surface is recessed to form a pit (P) having an opening surface, and a fixed pit cover (2c) is installed so that the elevating mechanism can be stored.

The vehicle maintenance lift according to the present invention is variably attached to at least one link (14) of the elevating mechanism, the link is tilted in the pit, and the pedestal is in the lower limit position. The movable pit cover is provided with a movable pit cover (50) that closes a predetermined opening portion (2f) that is not closed by the pedestal in the pit opening surface, and the movable pit cover has the pedestal raised by the elevating mechanism. When moving up and down between the lower limit position and the predetermined height position (H1) above the lower limit position, the relative position with respect to the link is changed to maintain a state in which the predetermined opening portion is closed. ..

According to this configuration, when the pedestal moves up and down between the lower limit position and the predetermined height position, the predetermined opening portion is closed by the movable pit cover by changing the relative position of the movable pit cover with respect to the link. The state is retained. Therefore, it is safe to prevent accidents in which an operator inadvertently pinches his / her hand between the cradle and the movable pit cover or his / her foot between the movable pit cover and the fixed pit cover. It has the effect of improving sex.

Further, in the vehicle maintenance lift according to the present invention, the movable pit cover has a flat plate-shaped cover body (51) and a mounting portion (52) extending vertically from the lower surface of the cover body and attached to the side surface of the link. A receiving member (2 g) for supporting the cover body in a horizontal posture is provided in the pit, and an engaging portion (14c to 14e) protrudes from either of the link and the mounting portion. Engaged portions (52c to 52e) that are provided and have a predetermined length (L) along the relative movement path of the engaging portion that is engaged with the engaging portion and is associated with the elevating operation. ) Is provided, and when the pedestal moves up and down between the lower limit position and the predetermined height position, the cover body is supported by the receiving member, and the engaging portion and the engaged portion are engaged. The cover body maintains the state in which the predetermined opening portion is closed by the relative movement within the range of the predetermined length in the state of being engaged with the cover body.

According to this configuration, when the pedestal moves up and down between the lower limit position and the predetermined height position, the cover body is supported by the receiving member and the engaged portion and the engaged portion are engaged with each other. By moving relative to each other within a predetermined length range to change the relative position of the movable pit cover with respect to the link, it is possible to reliably maintain the state in which the predetermined opening portion is closed by the cover body.

Further, in the vehicle maintenance lift according to the present invention, the predetermined height position is a height position where the mounting surface of the pedestal is 50 mm or more and 150 mm or less from the floor surface.

According to this configuration, when moving up and down between the lower limit position where the mounting surface of the pedestal is flush with the floor surface and the predetermined height position of 50 mm or more and 150 mm or less from the floor surface, a predetermined position is provided by the movable pit cover. The state in which the opening portion is closed can be reliably maintained. Therefore, it is possible to improve the safety when the pedestal is liable to cause an accident such as pinching, and when the pedestal goes up and down a relatively low height from the floor surface.

Further, in the vehicle maintenance lift according to the present invention, the cradle includes a vehicle receiver (31) at the tip and a swing arm (30) pivotally supported so as to be horizontally rotatable.

According to this configuration, the pedestal provided with the swing arm is made compact, and the pedestal is at the lower limit position and the predetermined height even when a predetermined opening portion that is not closed by the pedestal is formed in the pit opening surface. When moving up and down between the position and the position, the movable pit cover keeps the predetermined opening closed, which has the effect of improving safety.

It is a perspective view (the upper limit of a cradle, the link pit cover rise) which looked at the whole of the vehicle maintenance lift which concerns on embodiment of this invention from diagonally right front. It is a perspective view (while raising and lowering the pedestal, the link pit cover is raised) when the lift for vehicle maintenance is viewed from diagonally right front. It is a perspective view (link pit cover closed position while raising and lowering the pedestal) when the lift for vehicle maintenance is viewed from diagonally right front. It is a perspective view (lower limit of cradle, link pit cover closed position) when the lift for vehicle maintenance is viewed from diagonally right front. It is a perspective view (temporary stop position slightly above the lower limit of the cradle, the link pit cover closing position, the swing arm rotation position) when the lift for vehicle maintenance is viewed from diagonally left rear. It is an exploded perspective view which shows the state which removed the link pit cover from a long link. It is a side view which shows the relative position of the link pit cover with respect to the long link at the lower limit of a cradle. It is a side view which shows how the pedestal moves up and down between a lower limit and a predetermined height, and the relative position of a link pit cover with respect to a long link changes. It is a side view which shows the relative position of the link pit cover with respect to a long link when a pedestal moves up and down above a predetermined height. FIG. 7 is an enlarged cross-sectional view taken along the line XX in FIG. 7. It is a side view which shows the lift for vehicle maintenance at the lower limit of a cradle. It is a side view which shows the lift for vehicle maintenance while raising and lowering a cradle (predetermined height). It is a side view which shows the lift for vehicle maintenance while raising and lowering a cradle (slightly above a predetermined height). It is a side view which shows the lift for vehicle maintenance while raising and lowering a cradle (above a predetermined height). It is a side view which shows the lift for vehicle maintenance at the time of the upper limit of a cradle.

Hereinafter, an embodiment embodying the vehicle maintenance lift of the present invention will be described with reference to the drawings.
(1. Overall configuration of vehicle maintenance lift 1)
First, the overall configuration of the vehicle maintenance lift 1 of the present embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is a perspective view (upper limit of cradle, rise of link pit cover) of the entire vehicle maintenance lift 1 viewed from diagonally forward to the right. FIG. 2 is a perspective view of the vehicle maintenance lift 1 viewed diagonally from the front right (while the pedestal is being lifted and lowered, the link pit cover is raised), and FIG. (Closed position), FIG. 4 is a perspective view seen from diagonally right front (lower limit of pedestal, link pit cover closed position), and FIG. 5 is a perspective view also viewed diagonally from rear left (temporarily stopped slightly above the lower limit of pedestal). Position, link pit cover closed position, swing arm rotation position).

As shown in FIG. 1 and the like, the vehicle maintenance lift 1 includes bases 2 and 2, cradle 3 and 3, elevating mechanisms 10 and 10, and a control unit 90. Since the bases 2 and 2, the pedestals 3 and 3, and the elevating mechanisms 10 and 10 all have a symmetrical structure, only one of them will be described below in common.

The base 2 is formed in a rectangular frame having rail portions 2a and 2a along both sides, and has a lid-shaped fixed pit cover 2c on the rear upper surface and a lid-like lid on the front upper surface with the elevating mechanism 10 interposed therebetween. The fixed pit cover 2d is provided. The fixed pit covers 2c and 2d are housed and installed in the pits P recessed in the floor surface F so that their upper surfaces coincide with the floor surface F. At the front end near the outer surface of the fixed pit cover 2c, an elongated plate-shaped receiving member 2g is projected forward along the opening portion 2f that is not closed by the pedestal 3 in the pit P. The receiving member 2g is a member that supports the link pit cover 50, which will be described later, from below when the elevating mechanism 10 is lowered.

The lower portion of the fixed pit cover 2c is adapted to slide forward as the base end portion 14a of the long link 14 moves. The fixed pit cover 2d has a shape in which the region where the front end portion of the pedestal 3 moves up and down is cut out, and the pedestal 3 is located above the floor surface F, and the opening portion is opened in the pit P opening surface. 2e is formed. An elevating pit cover 40 is provided in the opening portion 2e so as to be openable and closable.

The pedestal 3 is a flat plate-shaped body to be lifted and lowered by the lifting mechanism 10. The base ends of the pair of swing arms 30 and 30 having semicircular end faces are horizontally rotatably supported by the shaft support portions 30a and 30a on both sides of the pedestal 3 with the central portion sandwiched in the longitudinal direction. The pedestal 3 has a substantially T-shape that is cut out from a rectangular shape to the inside in the width direction along a part of the outer shape of the pair of swing arms 30 and 30 in a plan view, and the size in the width direction is the elevating mechanism 10. A pair of swing arms 30 and 30 are housed in the same width direction region. The swing arm 30 can be expanded and contracted to an arbitrary length by sliding the extension arm 30b, and is provided with a vehicle receiver 31 at its tip.

The elevating mechanism 10 is a device that opens and closes a so-called λ-shaped link mechanism formed by intersecting a short link and a long link longer than the short link, and expands and contracts the pedestal 3 up and down. More specifically, the elevating mechanism 10 includes a short link 12, a long link 14, an elevating link 16, a support rod 18, and a cylinder 20.

The short link 12 is a link member corresponding to a short link in a so-called λ-shaped link mechanism. The base end of the short link 12 is pivotally supported by the front end of the base 2. The short link 12 intersects the long link 14 at the tip portion, and the tip portion is pivotally supported at the intermediate portion of the long link 14. The short link 12 extends linearly from the base end portion toward the tip end portion and bends upward in the vicinity of the tip end portion intersecting the long link 14. Further, the short link 12 is formed in a box shape surrounded by a square shape by four plate-shaped members composed of a pair of left and right link plates and a pair of upper and lower reinforcing plates, thereby improving the rigidity. Has been done.

The long link 14 is a link member corresponding to the long link in the so-called λ-shaped link mechanism, and is configured to be longer than the short link 12. The long link 14 is composed of a pair of left and right link plates, and the tip end portion which is the upper end at the time of lift-up is pivotally supported by the tip end portion of the elevating link 16 and intersects the short link 12 in a λ shape at the intermediate portion. It is pivotally supported at the tip of the. Further, in the long link 14, a guide roller 14g is rotatably attached to a base end portion, and the guide roller 14g rolls the rail portions 2a and 2a of the base 2. The rail portion 2a is formed in a correction curve shape in which the central portion curves downward. Since the base end portion of the long link 14 moves up and down along the rail portion 2a having a correction curve shape, the pedestal 3 can maintain a horizontal posture without being tilted during the raising and lowering operation.

A link pit cover 50 is attached to the middle of the long link 14 in the longitudinal direction. The link pit cover 50 will be described in detail in (2. Configuration of the link pit cover 50) described later.

The elevating link 16 is a member that fixes the pedestal 3 on the upper surface and supports it horizontally, and its size in the width direction is equal to or smaller than that of the pedestal 3. In the elevating link 16, the front end portion is pivotally supported by one end of the support rod 18, and the rear end portion that supports the pedestal 3 on the upper surface is pivotally supported by the tip end portion of the long link 14. ..

The support rod 18 is a rod-shaped member, one end of which is pivotally supported by the base end of the elevating link 16, and the other end of which is closer to the base end of the short link 12 than the shaft support of the long link 14. It is supported by.

The cylinder 20 is a single-rod hydraulic cylinder, and includes a bottomed cylindrical cylinder tube and a piston rod provided so as to be reciprocating with respect to the cylinder tube by hydraulic pressure. In the cylinder 20, one end on the bottom side of the cylinder tube is pivotally supported at a portion of the short link 12 closer to the base end than the shaft support with the long link 14, and the other end on the rod end side of the piston rod is long. It is pivotally supported at the base end of the shaku link 14. Between the cylinder 20 and the long link 14, a fall prevention mechanism including racks provided on both sides of the cylinder 20 and locking members for locking the racks is provided. The fall prevention mechanism ensures safety even if the oil pressure of the cylinder 20 drops. Further, a cylinder cover is provided so as to cover the cylinder 20, and the space below the fixed pit cover 2c is moved in and out as the elevating mechanism 10 moves up and down.

The control unit 90 is an electronic control device that is electrically connected to the elevating mechanism 10 to control the elevating operation. The control unit 90 is provided with a stop button 94 for commanding the stop of the ascending / descending operation, and a remote controller 91 as a command input unit is connected to the control unit 90. The remote controller 91 includes an ascending button 92 for instructing the elevating mechanism 10 to perform an ascending operation and a descending button 93 for instructing a descending operation.

(2. Mounting structure of link pit cover 50)
Next, the attachment structure of the link pit cover 50 to the long link 14 will be described with reference to FIGS. 6 to 10. FIG. 6 is an exploded perspective view showing a state in which the link pit cover 50 is removed from the long link 14. FIG. 7 is a side view showing the relative position of the link pit cover 50 with respect to the long link 14 at the lower limit of the pedestal 3, and FIG. 8 shows the pedestal 3 moving up and down between the lower limit and the predetermined height H1 to change the relative position. 9 is a side view showing the relative position when the pedestal 3 is located above the predetermined height H1. FIG. 10 is an enlarged cross-sectional view of FIG. 7 in the direction of arrow XX.

The long link 14 includes a curved portion 141 that includes a base end portion 14a and extends downward in a curved shape to form about two-thirds of the entire longitudinal direction, and a curved portion 141 that extends linearly from the tip side of the curved portion 141. It is composed of a straight portion 142 including a tip portion 14b, forming about 1/3 of the entire longitudinal direction.

The long link 14 is rotatably attached with three flanged rollers, a first roller 14c, a second roller 14d, and a third roller 14e, on a side surface on the tip end side of a curved portion 141 that is in the middle of the entire longitudinal direction. Has been done. The first roller 14c and the second roller 14d are arranged on the upper side and the lower side at intervals on the circumference of the radius R1 from the rotation center C of the long link 14. The third roller 14e is also arranged on the circumference of a radius R2 (where R2> R1) from the center of rotation C.

The link pit cover 50 has a cover main body 51 and a mounting portion 52 attached to a side surface (side surface on the tip end side of the curved portion 141) in the longitudinal direction of the long link 14, and is positioned relative to the long link 14. It is mounted variably. The cover body 51 is formed in a flat plate shape having a polygonal shape along the contour of the opening portion 2f that is not closed by the pedestal 3 in the pit P. The mounting portion 52 extends vertically from the lower surface of the cover main body 51 and is formed in a flat plate shape having a polygonal shape along the contour of the curved portion 141 tip portion of the long link 14.

The mounting portion 52 includes a first slot 52c, a second slot 52d, and a second slot 52d, to which three rollers with brims, a first roller 14c, a second roller 14d, and a third roller 14e, on the long link 14 side are engaged, respectively. Three elongated holes of the third elongated hole 52e are formed. The first slot 52c has a predetermined length corresponding to the first roller 14c along the circumference of the radius R1 centered on the rotation center C of the long link 14 (the length L of the movement range of the first roller 14c). It is formed in the shape of an arc. The second slot 52d corresponds to the second roller 14d and has the same length as the first slot 52c below the first slot 52c along the circumference of the radius R1 centered on the center of rotation C. It is formed in an arc shape. The third slot 52e is formed in an arc shape having the same length as the first slot 52c along the circumference of the radius R2 centered on the rotation center C corresponding to the third roller 14e.

The inner peripheral surfaces of the first to third elongated holes 52c to 52e on the upper end side have a larger diameter than the other portions, and the first to third rollers 14c to 14e are assembled to the long link 14. Is inserted from the large-diameter portion at the upper end of the first to third elongated holes 52c to 52e, and after assembly, is engaged with the inner peripheral surface outside the large-diameter portion so as not to come off.

Two stoppers 52s are provided on the inner surface near the lower surface of the cover main body 51, which is the upper part of the mounting portion 52, on the same straight line passing through the rotation center C at intervals. The stopper 52s is composed of metal fittings such as bolts to be fastened to the mounting portion 52. The stopper 52s regulates the relative position of the link pit cover 50 with respect to the long link 14 by abutting on the upper edge of the long link 14, and the first to third rollers 14c to 14e are the first to third long holes 52c. By preventing the movement from moving to the large diameter portion at the upper end of the ~ 52e, the detachment from the first to third elongated holes 52c to 52e is prevented.

On the outer surface of the mounting portion 52, the cover lid 60 is attached by metal fittings such as bolts to cover the entire surface, and the first to third elongated holes 52c to 52e with which the first to third rollers 14c to 14e are engaged are provided. It is designed not to be exposed. The cover lid 60 is a flat plate-shaped member having a shape that matches the contour of the mounting portion 52. On the inner surface of the cover lid 60, a first recessed groove 60c, a second recessed groove 60d, and a third groove corresponding to the first slot 52c, the second slot 52d, and the third slot 52e are slightly larger than these. Three concave grooves of the concave groove 60e are provided to form a moving space for the first roller 14c, the second roller 14d, and the third roller 14e.

(3. Relative position change of the link pit cover 50 as the cradle 3 moves up and down)
Next, the relative position change of the link pit cover 50 accompanying the raising and lowering of the pedestal 3 by the raising and lowering mechanism 10 will be described with reference to FIGS. 11 to 15. FIG. 11 is a side view showing the vehicle maintenance lift 1 at the lower limit of the pedestal 3 (pedestal height H = 0). FIG. 12 is a side view showing the vehicle maintenance lift 1 when the pedestal 3 is at the predetermined height H1 (pedestal height H = H1), and FIG. 13 shows the pedestal 3 slightly exceeding the predetermined height H1. A side view showing a vehicle maintenance lift 1 when (pedestal height H> H1), FIG. 14 shows a vehicle when the pedestal 3 is further above a predetermined height H1 (pedestal height H> H1). It is a side view which shows the maintenance lift 1. FIG. 15 is a side view showing the vehicle maintenance lift 1 at the upper limit of the pedestal 3 (pedestal height H = Hmax). 11 corresponds to the perspective view of FIG. 4, FIG. 12 corresponds to the perspective view of FIG. 3, FIG. 14 corresponds to the perspective view of FIG. 2, and FIG. 15 corresponds to the perspective view of FIG.

When the pedestal 3 is located at the lower limit, as shown in FIG. 11, the cover main body 51 of the link pit cover 50 is supported from below by the receiving member 2g, and the opening portion 2f is closed in a horizontal posture. At this time, the first to third rollers 14c to 14e are located at the lower ends of the first to third elongated holes 52c to 52e, as shown in FIG.

Next, in a state where the pedestal 3 is located at a predetermined height H1 or less, as shown in FIG. 12, the cover body 51 of the link pit cover 50 is supported from below by the receiving member 2g, as in FIG. The opening portion 2f is closed in a horizontal posture. At this time, as shown in FIG. 8, the first to third rollers 14c to 14e are located above the lower end in the first to third elongated holes 52c to 52e, and the stopper 52s is curved of the long link 14. It is in a state of being separated from the upper edge of the portion 141.

Next, in a state where the pedestal 3 is located at a height slightly exceeding the predetermined height H1, as shown in FIG. 13, the cover main body 51 of the link pit cover 50 is separated upward from the receiving member 2g to cover the cover. A slight gap is formed under the main body 51. At this time, as shown in FIG. 9, the first to third rollers 14c to 14e are located above the lower end in the first to third elongated holes 52c to 52e, and the stopper 52s is on the upper edge of the curved portion 141. The link pit cover 50 is in contact with the long link 14 and is supported by the long link 14.

Subsequently, when the pedestal 3 rises, as shown in FIG. 14, the opening portion 2f opens wide and the curved portion 141 of the long link 14 appears on the surface from the pit P, and when it rises further, as shown in FIG. The cylinder 20 appears on the surface from the pit P, and the pedestal 3 reaches the upper limit position. During the ascending / descending operation shown in FIGS. 14 to 15, at this time, as shown in FIG. 9, the first to third rollers 14c to 14e are the first to third elongated holes 52c to the same as in the state of FIG. It is located above the lower end of the 52e, and the stopper 52s is in contact with the upper edge of the curved portion 141, so that the link pit cover 50 is supported by the long link 14.

When the cradle 3 descends from the upper limit position shown in FIG. 15 to the lower limit position shown in FIG. 11, it is the same as the ascending operation described above except that the order is reversed. Omit.

(4. Summary)
1. 1. The vehicle maintenance lift 1 of the present embodiment opens and closes a link mechanism formed by intersecting and connecting a plurality of links (short link 12 and long link 14) in a λ shape with a pedestal 3 on which a vehicle is placed. As a result, the floor surface F is provided with an elevating mechanism 10 for raising and lowering the pedestal 3 provided at the upper end so that the mounting surface of the pedestal 3 is flush with the floor surface F at the lower limit position of the pedestal 3. Is recessed to form a pit P having a pit opening surface, and a fixed pit cover 2c is installed so that the elevating mechanism 10 can be stored.

Then, the vehicle maintenance lift 1 is attached in a variable position relative to the long link 14 of the elevating mechanism 10, and when the long link 14 is tilted in the pit P and the pedestal 3 is in the lower limit position, the pit The link pit cover 50 is provided as a movable pit cover that closes the opening portion 2f that is not closed by the pedestal 3 in the P opening surface. The link pit cover 50 has the pedestal 3 above the lower limit position and the lower limit position by the elevating mechanism 10. When ascending and descending from the predetermined height position H1, the relative position with respect to the long link 14 is changed to maintain the state in which the opening portion 2f is closed.

According to this configuration, when the pedestal 3 moves up and down between the lower limit position and the predetermined height position H1, the link pit cover 50 opens by changing the relative position of the link pit cover 50 with respect to the long link 14. The closed state of the portion 2f is maintained. Therefore, it is effective to cause an accident in which an operator inadvertently pinches a hand between the pedestal 3 and the link pit cover 50 or a foot between the link pit cover 50 and the fixed pit cover 2c. It has the effect of preventing it and improving safety.

2. 2. The link pit cover 50 has a flat plate-shaped cover main body 51 and a mounting portion 52 extending vertically from the lower surface of the cover main body 51 and attached to the side surface of the long link 14, and the cover main body 51 is provided in the pit P. A receiving member 2g that supports the pit P opening surface in a horizontal posture is provided, and the long link 14 and the mounting portion 52 are provided on the side surface of the long link 14 which is one of them, and the first to third rollers as engaging portions are provided. 14c to 14e are projected, and the relative movement path of the first to third rollers 14c to 14e that can be engaged with the first to third rollers 14c to 14e on the other mounting portion 52 and is accompanied by the elevating operation. When the first to third elongated holes 52c to 52e are provided as engaged portions having a predetermined length L along the above, and the pedestal 3 moves up and down between the lower limit position and the predetermined height position H1. The cover body 51 is supported by the receiving member 2g, and moves relative to each other within a predetermined length L in a state where the first to third rollers 14c to 14e and the first to third elongated holes 52c to 52e are engaged. By doing so, the state in which the opening portion 2f is closed by the cover main body 51 is maintained.

According to this configuration, when the pedestal 3 moves up and down between the lower limit position and the predetermined height position H1, the cover main body 51 is supported by the receiving member 2g, and the first to third rollers 14c to 14e and the first By moving relative to each other within a predetermined length L in a state where the first to third elongated holes 52c to 52e are engaged to change the relative position of the link pit cover 50 with respect to the long link 14, the cover body 51 The state in which the opening portion 2f is closed can be reliably maintained.

3. 3. The predetermined height position H1 is a height position where the mounting surface of the pedestal 3 is 50 mm or more and 150 mm or less from the floor surface F.

According to this configuration, when moving up and down between the lower limit position where the mounting surface of the pedestal 3 is flush with the floor surface F and the predetermined height position H1 which is 50 mm or more and 150 mm or less from the floor surface F, the link pit The cover 50 can reliably hold the state in which the opening portion 2f is closed. Therefore, it is possible to improve the safety when the pedestal 3 moves up and down a relatively low height from the floor surface where an accident such as pinching is likely to occur.

4. The pedestal 3 includes a vehicle receiver 31 at the tip thereof and a swing arm 30 pivotally supported so as to be horizontally rotatable.

According to this configuration, the pedestal 3 provided with the swing arm 30 is compactly configured, and the pedestal 3 is the lower limit even when the opening portion 2f that is not closed by the pedestal 3 is formed in the pit P opening surface. When moving up and down between the position and the predetermined height position H1, the state in which the opening portion 2f is closed is maintained by the link pit cover 50, which has the effect of improving safety.

(5. Modification example)
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, in the above embodiment, an example in which the present invention is applied to a vehicle maintenance lift provided with a swing arm has been shown, but the present invention is not limited to this, and the present invention is applied to a vehicle maintenance lift having no swing arm. May be carried out. Further, in the above embodiment, an example is shown in which the elevating mechanism 10 is configured by a link mechanism in which the short link 12 and the long link 14 are connected by crossing them in a λ shape, but the present invention is not limited to this, and a plurality of such mechanisms are shown. The present invention can also be applied when the links are configured by a link mechanism formed by crossing and connecting the links in an X shape.

Further, in the above embodiment, the first to third rollers 14c to 14e as engaging portions are provided on the long link 14 side, and the first to third elongated holes as engaged portions are provided on the link pit cover 50 side. Although 52c to 52e are provided, an engaged portion may be provided on the long link 14 side and an engaging portion may be provided on the link pit cover 50 side.

1 ... Vehicle maintenance lift, 2f ... Opening part, 2g ... Receiving member, 3 ... Cradle, 10 ... Elevating mechanism, 12 ... Short link, 14 ... Long link, 14c ... First roller (engagement part), 14d ... 2nd roller (engagement part), 14e ... 3rd roller (engagement part), 50 ... link pit cover (movable pit cover), 51 ... cover body, 52 ... mounting part, 52c ... first slotted hole (covered) Engagement part), 52d ... 2nd long hole (engaged part), 52e ... 3rd long hole (engaged part), P ... pit, F ... floor surface.

Claims (4)

It has a pedestal on which a vehicle is placed and an elevating mechanism that raises and lowers the pedestal provided at the upper end by opening and closing a link mechanism formed by crossing and connecting a plurality of links in a λ or X shape. The floor surface is recessed to form a pit having a pit opening surface and a fixed pit cover is installed so that the mounting surface of the pedestal is flush with the floor surface at the lower limit position of the pedestal. It is a vehicle maintenance lift configured to be able to store the elevating mechanism.
It is variably attached to at least one link of the elevating mechanism, and when the link is tilted in the pit and the pedestal is in the lower limit position, it is closed by the pedestal in the pit opening surface. Equipped with a movable pit cover that closes a predetermined opening that is not
When the pedestal moves up and down between the lower limit position and the predetermined height position above the lower limit position by the elevating mechanism, the movable pit cover changes the relative position with respect to the link to the predetermined opening portion. A vehicle maintenance lift configured to keep the vehicle closed. The movable pit cover has a flat plate-shaped cover main body and a mounting portion that extends vertically from the lower surface of the cover main body and is attached to the side surface of the link.
The pit is provided with a receiving member that supports the cover body in a horizontal posture.
The link and the mounting portion have an engaging portion projecting from one of them, and the other can engage with the engaging portion along the relative movement path of the engaging portion accompanying the elevating operation. An engaged portion having a predetermined length is provided.
When the pedestal moves up and down between the lower limit position and the predetermined height position, the cover body is supported by the receiving member, and the engaging portion and the engaged portion are engaged with each other. The vehicle maintenance lift according to claim 1, wherein the cover body maintains a state in which the predetermined opening portion is closed by relatively moving within the predetermined length range in the state. The vehicle maintenance lift according to claim 1 or 2, wherein the predetermined height position is a height position where the mounting surface of the pedestal is 50 mm or more and 150 mm or less from the floor surface. The vehicle maintenance lift according to any one of claims 1 to 3, wherein the pedestal is provided with a vehicle receiver at the tip and a swing arm pivotally supported so as to be horizontally rotatable.

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