JP2012106810A - Lift for vehicle maintenance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a cost increase by forming a compact lift of a swing arm.SOLUTION: An arm lift 30 is formed of: spindles 12 and 12 projecting downward from the base ends of swing arms 7 and 7; an air cylinder 31 provided horizontally on the base side; sliders 33 and 33 mounted to the piston rod 32 to serve as tilt faces 34 whose front end tilts down forward; and a push-up plate 36 which is vertically movably provided with a pair of rollers 39 and 39, can relatively roll along the tilt faces 34 of the sliders 33 and 33, and contacts with the falling position of each of the spindles 12 of the swing arms 7 and 7 at the lowest limit position and the lower side position of a vehicle placing table 4. The swing arms 7 and 7 are pushed up via the spindles 12 and 12 by moving up the push-up plate 36 from the lower position while rolling the rollers 39 and 39 along the tilt faces 34 by forward motions of the sliders 33 and 33 accompanied by the extension of the piston rod 32.

Description

  The present invention relates to a vehicle maintenance lift provided with a pair of swing arms capable of horizontally turning on a vehicle mounting table that supports a vehicle and moves up and down.

The vehicle maintenance lift includes a pair of vehicle mounting tables (also referred to as drive-on plates, tables, and boards) that support the vehicle and move up and down by an X-link mechanism, a hydraulic cylinder, and the like. A pair of swing arms capable of horizontal turning along the upper surface of the vehicle mounting table is provided.
As shown in Patent Documents 1 and 2, the swing arm is in a standby posture located outside the vehicle mounting table, and has an upper position that protrudes upward from the upper surface of the vehicle mounting table and a lower position that is lower than the upper surface of the vehicle mounting table. It is known that a swing arm is pushed up to an upper position by an arm elevating device that is supported so as to be movable up and down with respect to a side position and operates at a lower limit position of a vehicle mounting table.

Japanese Patent No. 2664359 Japanese Patent No. 3771461

  However, since the conventional arm lifting device is provided with an actuator such as an air cylinder that pushes up the swing arm upward, the overall height in the vertical direction is increased, and the pit recessed in the floor surface is provided with the arm lifting device. Therefore, it is necessary to make a deeper recess in accordance with this, leading to an increase in cost.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle maintenance lift in which an arm lifting device can be formed in a compact manner and cost is suppressed.

In order to achieve the above object, according to the first aspect of the present invention, there is provided an arm lifting device, wherein the arm lifting device is disposed laterally on a support shaft projecting downward from a base end of the swing arm and on a floor surface below the swing arm. An actuator provided with a rod that extends and retracts, a pair of left and right sliders that are attached to the front end of the rod and move forward and backward integrally, with the front end tilting downward and forward, and an inclined surface of the slider that moves forward and backward A pair of rolling elements that can be relatively rolled along the upper and lower sides of the swing arm are provided at a lower position at the lower limit position of the vehicle mounting table. An abutting push-up member, and the slider is moved forward along the inclined surface by the advance of the slider as the rod extends, and the push-up member is lifted from the lowered position while being swung along the inclined surface. It is characterized in that the pushing up to the upper position.
According to a second aspect of the present invention, in the configuration of the first aspect, the push-up member is disposed in the front-rear direction between the sliders, and a sleeve provided in the center is loosely inserted into a guide rod standing between the sliders. The sleeve is provided with rolling elements on the left and right sides of the sleeve, and is a push-up plate in which a receiving portion for receiving the lower end of each support shaft is formed at the front and rear ends.
According to a third aspect of the present invention, in the configuration of the second aspect, a support plate is provided on the side surface of the vehicle mounting table to guide the vertical movement between the lower position and the upper position by loosely inserting the support shaft. The plate is formed with a fitting hole into which the upper end of the guide bar is fitted at the lower limit position of the vehicle mounting table.
According to a fourth aspect of the present invention, in the configuration of the second or third aspect, an urging means for urging the push-up plate toward the backward side of the slider is provided.

According to invention of Claim 1, an arm raising / lowering apparatus can be formed compactly. Therefore, it is not necessary to dig deeply in the pit, and the cost associated with the installation can be suppressed.
According to the second aspect of the present invention, in addition to the effect of the first aspect, the push-up member and the guide bar are accommodated between the sliders, and the arm lifting device becomes more compact.
According to the third aspect of the present invention, in addition to the effect of the second aspect, the positional relationship between the support plate and the guide bar at the lower limit position is maintained, and the support shaft can be reliably received by the push-up member. Further, since the guide rod does not tilt when the push-up member is raised and lowered, the sleeve is not twisted, and a smooth raising and lowering operation of the push-up member can be ensured.
According to the fourth aspect of the invention, in addition to the effect of the second or third aspect, the friction during the rise between the sleeve and the guide bar is reduced, and a reduction in loss can be expected.

It is a perspective view of a lift for vehicle maintenance (a vehicle mounting base is an upper limit position, and a swing arm is a turning position). It is a side view of a lift for vehicle maintenance (a vehicle mounting base is an upper limit position, and a swing arm is a turning position). It is explanatory drawing of the vehicle maintenance lift with a vehicle mounting base in a lower limit position, and a swing arm in a lower position, (A) shows a perspective view, (B) shows a side surface, respectively. It is a side view of a lift for vehicle maintenance (a vehicle mounting base is an upper limit position, and a swing arm is a lower position). It is explanatory drawing of an arm raising / lowering apparatus, (A) shows a front surface, (B) shows a side surface, respectively. It is a perspective view of an arm raising / lowering apparatus. It is explanatory drawing of the arm raising / lowering apparatus which has a swing arm in a lower position, (A) shows a front surface, (B) shows a side surface, respectively. It is a perspective view of the arm raising / lowering apparatus which has a swing arm in a lower position. It is explanatory drawing of the arm raising / lowering apparatus which has a swing arm in an upper position, (A) shows a front surface, (B) shows a side surface, respectively. It is a perspective view of the arm raising / lowering apparatus which has a swing arm in an upper position. It is a perspective view of the arm raising / lowering apparatus in which a swing arm exists in a turning position. It is a perspective view which shows the example of a change of an arm raising / lowering apparatus, (A) shows the upper side position of a swing arm, (B) shows the lower side position, respectively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an example of a vehicle maintenance lift, FIG. 2 is a side view thereof, and the vehicle maintenance lift 1 is a pantograph mechanism composed of two upper and lower X links on a pair of left and right bases 2 and 2. The vehicle mounting tables 4, 4 having a rectangular shape in plan view are supported horizontally through 3, 3, and the pantograph mechanism 3 is moved up and down by the expansion and contraction of the hydraulic cylinder 5 provided between the base 2 and the pantograph mechanism 3. This is a well-known configuration in which the vehicle mounting table 4 is moved up and down. A storage box 6 is provided between the bases 2 and 2 to store a tuning shaft, a motor, and the like that connect the lower links of the pantograph mechanisms 3 and 3.

  Further, as shown in FIG. 3, both the bases 2 and 2 and the storage box 6 are installed on the bottom surface of the pit P recessed in the floor, and the vehicle mounting tables 4 and 4 are shown in FIGS. The up / down control is performed between the upper limit position shown and the lower limit position of FIG. Here, the upper surface of the storage box 6 is also flush with the floor surface, and the pit P is substantially closed at the lower limit position of the vehicle mounting tables 4 and 4.

  Further, a pair of swing arms 7 and 7 are provided on the outer longitudinal side of each vehicle mounting table 4. The swing arm 7 includes a front end arm 9 having a receiver 8 detachably attached to a front end, a square cylindrical intermediate arm 10 that stores the front end arm 9 in a removable manner, and an intermediate arm 10 that can be inserted and removed. The telescope structure is provided with the base end arm 11 that performs the above operation. As shown in FIG. 4, a support shaft 12 protrudes downward from the end of the base arm 11, and the support shaft 12 is in the shape of an elongated box provided on the outer surface of the vehicle mounting table 4. A support plate 14 provided substantially at the center in the longitudinal direction is passed through the storage portion 13, and a large-diameter washer 15 is fixed to the lower end with a nut 16. Reference numeral 17 denotes a connecting plate that connects the upper ends of the support shafts 12 and 12 with the upper surfaces of the swing arms 7 and 7.

Therefore, the swing arms 7 and 7 are supported so as to be able to turn horizontally around the support shaft 12, and the swing arms 7 and 7 are detached from the receiver 8 in a straight waiting position along the outer surface of the vehicle mounting table 4. 7 is contracted, the support 12 is provided on the lower surface of the support plate 14 and the lower position where the upper surface of the base arm 11 substantially coincides with the upper surface of the vehicle mounting table 4 and the support shaft 12 penetrates. The washer 15 comes into contact with the stopper 18 so that the lower surface of the proximal arm 11 can move up and down between the upper position above the upper surface of the vehicle mounting table 4. In this lower position, the swing arms 7 and 7 are stored in the storage portion 13 without protruding from the vehicle mounting table 4, and the support shaft 12 of each swing arm 7 passes through the support plate 14 and the stopper 18 and moves downward. It is designed to protrude.
On the contrary, if the swing arms 7 and 7 are pulled up and extended to the upper position and swiveled to the vehicle mounting table 4 side, the base arm 11 is supported on the vehicle mounting table 4 and supported at an arbitrary turning position. Is done.

  On the other hand, a pit cover 20 is provided on the outer surface of the base 2 directly below the storage portion 13. The pit cover 20 has a lower plate 21 having a U-shaped cross section fixed along the base 2 at the bottom surface of the pit P, and a lower dimension above the lower plate 21 and larger in the longitudinal direction than the lower plate 21. An upper plate 22 having an inverted U-shaped cross section facing the plate 21, an X link 23 that supports the upper plate 22 between the upper and lower plates 21, 22 so as to be movable up and down on the lower plate 21, and the X link 23 upward A spring portion 24 that urges in the extending direction and a latch portion 25 that fixes the X link 23 that is urged and extended in a predetermined position are provided. That is, when the vehicle mounting table 4 rises, the upper plate 22 rises due to the urging of the spring portion 24, and when the upper surface of the upper plate 22 becomes the same height as the floor surface, the latch portion 25 fixes the X link 23. When the vehicle mounting table 4 is lowered, the release piece 26 provided on the vehicle mounting table 4 releases the fixing by the latch portion 25, and at the same time, a rubber plate (not shown) provided on the lower surface of the storage portion 13 is lowered as shown in FIG. The upper plate 22 is pressed and lowered.

In the pit cover 20, an arm lifting device 30 that lifts and lowers the swing arms 7 and 7 between the upper position and the lower position at the lower limit position of the vehicle mounting table 4 is provided. This arm lifting device 30 is shown in FIGS. However, in the drawings after FIG. 5, for convenience, the pit cover 20 is omitted except for a part of the lower plate 21, and the base 2 and the storage portion 13 are also omitted.
First, on the lower plate 21, an air cylinder 31 as an actuator is disposed laterally along the longitudinal direction of the lower plate 21, and a front end of a piston rod 32 of the air cylinder 31 (hereinafter referred to as piston rod in the arm lifting device 30). A pair of left and right sliders 33 and 33 are fixed to the front side of 32. The slider 33 is a plate body having a front end inclined to be inclined downward, and a pair of front and rear rollers 35, 35 are provided at the lower part of each slider 33, and the slider 33 accompanying the expansion and contraction of the piston rod 32. Guides forward and backward movement.

  Further, a push-up plate 36 as a long push-up member having a sleeve 37 at the center is disposed between the sliders 33, 33, and the sleeve 37 is a guide rod provided between the sliders 33, 33. The push-up plate 36 is supported so as to move up and down along the guide bar 38 by being loosely inserted into the plate 38. Rollers 39 and 39 as rolling elements are provided on the left and right sides of the sleeve 37, respectively, so that the inclined surfaces 34 and 34 can relatively roll as the sliders 33 and 33 move forward and backward.

Further, the nuts 16 and 16 of the support shafts 12 and 12 are engaged with the front and rear ends of the push-up plate 36 when the swing arms 7 and 7 are in the lower position at the lower limit position of the vehicle mounting table 4. A through hole 40 and a notch 41 are formed as receiving portions for receiving the washers 15 and 15, respectively.
As shown in FIG. 1, the upper plate 22 has through holes 42 and 42 through which the lowered support shafts 12 and 12 pass, and a guide bar 38, a sleeve 37, and a roller 39 when the upper plate 22 is lowered. And through-holes 43 through which are formed. On the other hand, the support plate 14 is formed with a fitting hole 44 into which the upper end of the guide bar 38 is fitted at the lower limit position of the vehicle mounting table 4.

The operation of the arm lifting device 30 of the vehicle maintenance lift 1 configured as described above will be described.
First, in the state shown in FIGS. 7 and 8, the swing arms 7 and 7 are in the lower position where they are accommodated in the storage portion 13, and the vehicle mounting tables 4 and 4 are lowered to the lower limit position. On the other hand, in the arm elevating device 30, the piston rod 32 of the air cylinder 31 contracts and the sliders 33 and 33 are retracted. In this state, as described above, the storage portion 13 pushes down the upper plate 22 through the rubber plate, and the support shafts 12 and 12 pass through the upper plate 22 and protrude into the pit cover 20, and the nuts 16 and 16 at the lower end are projected. Are respectively fitted into the through hole 40 and the notch 41 of the push-up plate 36 at the lowest position. Further, the upper end of the guide bar 38 is fitted in the fitting hole 44 of the support plate 14. At this time, the rollers 39 and 39 of the push-up plate 36 are in contact with the lower ends of the inclined surfaces 34 of the sliders 33 and 33.

  From here, the piston rod 32 is extended by operating the air cylinder 31 by operating a control panel (not shown). Then, as shown in FIGS. 9 and 10, the sliders 33, 33 move forward to push the rollers 39, 39 to the upper end along the inclined surfaces 34, 34, so that the push-up plate 36 also rises along the guide bar 38, The support shafts 12, 12 received at the front and rear ends are pushed up. At this time, since the left and right rollers 39 and 39 are simultaneously rolled along the inclined surfaces 34 of the left and right sliders 33 and 33, the push-up plate 36 maintains the front and rear direction and the horizontal posture without rotating or tilting. It rises while doing. Further, since the upper end of the guide bar 38 is fitted in the fitting hole 44 of the support plate 14, the positional relationship between the support plate 14 and the guide bar 38 is maintained and the guide bar 38 does not tilt.

When the support shafts 12 and 12 are pushed up by the push-up plate 36, the swing arms 7 and 7 are also raised to the upper position, so that the operator moves the swing arms 7 and 7 to the upper surface side of the vehicle mounting table 4 as shown in FIG. The tip arm 9 and the intermediate arm 10 are pulled out and the receiving arm 8 can be attached to the tip arm 9.
When the vehicle mounting tables 4 and 4 are lifted, the swing arms 7 and 7 mounted on the upper surface of the vehicle mounting tables 4 and 4 are also lifted together with the vehicle mounting tables 4 and 4, and as shown in FIGS. Moves away from the push-up plate 36. At the same time, the upper plate 22 released from the pressing of the storage portion 13 by the rubber plate is lifted by the bias of the spring portion 24, and the swing arms 7 and 7 and the storage portion 13 are lifted as shown in FIGS. The opening of the pit P is closed.

  When the vehicle mounting tables 4 and 4 are lowered to the lower limit position after the work is finished, the support shafts 12 and 12 protrude into the pit cover 20 again and are pushed up by the sliders 33 and 33 and held at the upper end position of the guide bar 38. The upper end of the guide bar 38 is fitted into the fitting hole 44 of the support plate 14 (FIG. 11). In this state, after the swing arms 7 and 7 are contracted and swung to be positioned above the storage portion 13 (FIGS. 9 and 10), when the piston rod 32 of the air cylinder 31 is contracted, the sliders 33 and 33 are retracted. In order to lower the rollers 39, 39 located at the upper ends of the inclined surfaces 34, 34 to the lower end and lower the push-up plate 36, the swing arms 7, 7 whose push-up shafts 12, 12 are released are lifted by their own weight. It descends to the lower position and fits in the storage part 13 (FIGS. 7 and 8).

  Thus, according to the lift 1 for vehicle maintenance of the said form, the arm raising / lowering apparatus 30 is provided in the side of the base 2 and the support shafts 12 and 12 which protruded downward from the base end of the swing arms 7 and 7, respectively. And a pair of left and right air cylinders 31 provided with a piston rod 32 that is provided in a lateral direction and attached to the front end of the piston rod 32 to move forward and backward integrally, and the front end is an inclined surface 34 that is inclined downward. The sliders 33 and 33 are provided with a pair of rollers 39 and 39 that can relatively roll along the inclined surfaces 34 of the sliders 33 and 33 that move forward and backward, and are provided to be movable up and down between the sliders 33 and 33. And a push-up plate 36 that comes into contact with the respective support shafts 12 of the swing arms 7 and 7 at the lower position at the lower limit position of the vehicle mounting table 4 at the lowered position, and the slider 3 accompanying the extension of the piston rod 32 , 33 moves the rollers 39, 39 along the inclined surface 34 to raise the push-up plate 36 from the lowered position and push the swing arms 7, 7 to the upper position via the support shafts 12, 12. By doing so, the arm elevating devices 30, 30 can be formed compactly. Therefore, it is not necessary to dig the pit P deeply, and an increase in cost related to the installation can be suppressed.

In particular, here, the push-up member is disposed in the front-rear direction between the sliders 33, 33, and a sleeve 37 provided in the center is loosely inserted into a guide rod 38 erected between the sliders 33, 33 so that the sleeve 37 Since the rollers 39 are provided on the left and right sides, and the through holes 40 and the notches 41 for receiving the lower ends of the support shafts 12 are formed at the front and rear ends, respectively, the push plate 36 is formed between the sliders 33 and 33. And the guide rod 38 are accommodated, and the arm lifting device 30 becomes more compact.
Further, a support plate 14 is provided on the side surface of the vehicle mounting table 4 to guide the vertical movement between the lower position and the upper position when the support shafts 12 and 12 are loosely inserted. By forming the fitting hole 44 into which the upper end of the guide bar 38 is fitted at the lower limit position, the positional relationship between the support plate 14 and the guide bar 38 at the lower limit position is maintained, and the support shafts 12 and 12 are pushed up. Can be received reliably. On the other hand, since the guide bar 38 does not tilt when the push-up plate 36 is raised and lowered, the sleeve 37 is not twisted, and a smooth raising and lowering operation of the push-up plate 36 can be ensured.

  In the above embodiment, when the push-up plate 36 is lifted by the rolling of the rollers 39, 39 as the sliders 33, 33 are moved forward, friction is generated between the sleeve 37 and the guide rod 38, and the resistance at the time of lift is reduced. Become. For this reason, for example, as shown in FIG. 12, roller shafts 45, 45 supporting the rollers 39, 39 are protruded in the left-right direction, and pins 46, 46 are provided on the left and right side surfaces of the air cylinder 31, respectively. Preferably, coil springs 47 as urging means are respectively installed between the left and right roller shafts 45 and the pins 46, and the push-up plate 36 is preferably urged rearward. By providing a biasing means for biasing the push-up plate 36 toward the backward side of the slider 33 in this way, the friction during the rise between the sleeve 37 and the guide rod 38 is reduced, and a reduction in loss can be expected.

  The number and installation form of this coil spring can be changed as appropriate, for example, the rear end is locked to another component such as the lower plate. Further, the biasing means is not limited to such tension biasing, and may be compressed and biased by providing a coil spring between the support member standing on the front outer side of the slider and the roller shaft.

In addition, the push-up plate is not limited to the above form, and any of the receiving portions of the support shafts provided at the front and rear ends may be a through hole or a notch, or may be a recess depending on the thickness of the push-up plate. Further, the sleeve can be non-rotatably coupled to the guide rod by a key or a spline.
Furthermore, the actuator is not limited to an air cylinder, and other configurations such as a hydraulic cylinder and a ball screw driven by a motor may be adopted.
In addition to the above form, other structures for the vehicle maintenance lift are also provided, for example, a type in which the base and the vehicle mounting table are connected by a single X-link or λ-type link instead of a two-stage pantograph mechanism, or under the floor The design can be changed as appropriate, such as a type in which the vehicle mounting table is moved up and down by a vertical hydraulic cylinder.

  1 .... Lift for vehicle maintenance, 2 .... Base, 3 .... Pantograph mechanism, 4 .... Vehicle mounting table, 5 .... Hydraulic cylinder, 7 .... Swing arm, 8 .... Receipt, 11 .... Base end arm , 12 .. Support shaft, 13 .. Storage part, 14 .. Support plate, 15 .. Washer, 16 .. Nut, 20 .. Pit cover, 21 .. Lower plate, 22 .. Upper plate, 23. X link, 24 ... Spring part, 25 ... Latch part, 30 ... Arm lifting device, 31 ... Air cylinder, 32 ... Piston rod, 33 ... Slider, 34 ... Slant surface, 36 ... Push-up plate , 37 .. Sleeve, 38 .. Guide rod, 39 .. Roller, 40 .. Through hole, 41 .. Notch, P.

Claims (4)

A base position of the pair of swing arms is horizontally located on the side of the vehicle mounting table that moves up and down, and a lower position where the upper surface is lower than the upper surface of the vehicle mounting table, and a lower surface is the vehicle mounting table The upper and lower positions of the vehicle mounting table are provided so as to be movable up and down while the swing arm is arbitrarily moved up and down between the lower position and the upper position at the lower limit position of the vehicle mounting table. A vehicle maintenance lift provided with a device,
The arm lifting device is
A spindle projecting downward from the base end of the swing arm,
An actuator provided with a rod that is provided sideways on the floor surface below the swing arm and that expands and contracts;
A pair of left and right sliders that are attached to the front end of the rod and move forward and backward integrally, and the front end forms an inclined surface that slopes downward and forward;
A pair of rolling elements capable of relatively rolling along the inclined surface of the slider that moves forward and backward is provided so as to be movable up and down between the sliders, and the lower position at the lower limit position of the vehicle mounting table And a push-up member that abuts each support shaft of the swing arm at a lowered position,
As the slider advances as the rod extends, the push-up member is raised from the lowered position while rolling the rolling element along the inclined surface, and the swing arm is moved to the upper position via the support shaft. A lift for vehicle maintenance characterized by pushing it up.   The push-up member is disposed in the front-rear direction between the sliders, and a sleeve provided in the center is loosely inserted into a guide rod standing between the sliders, and the rolling elements are provided on the left and right sides of the sleeve, The lift for vehicle maintenance according to claim 1, wherein the lift plate is formed with a receiving portion for receiving the lower end of each of the support shafts at the front and rear ends.   A support plate is provided on the side surface of the vehicle mounting table to guide the vertical movement between the lower position and the upper position by loosely inserting the support shaft, and the support plate has the lower limit position of the vehicle mounting table. The lift for vehicle maintenance according to claim 2, wherein a fitting hole into which an upper end of the guide rod is fitted is formed.   The vehicle maintenance lift according to claim 2 or 3, further comprising an urging means for urging the push-up plate toward the backward side of the slider.

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