JP2018203381A - Vehicle maintenance lift - Google Patents

Abstract

To provide a vehicle maintenance lift having a lifting device performing lifting action by vertically expanding/contracting a link mechanism comprising multiple links, capable of automatically switching between a locked state and a released state of swing arms with a simple structure causing no trouble to maintenance work.SOLUTION: A vehicle maintenance lift comprises swing arm lock mechanisms 100 structured by having lock gears 102 and lock pieces 104, and a swing arm lock releasing mechanism 200 structured by having lock piece displacement mechanisms 210 which displace the lock pieces 104 between a locked attitude and a released attitude by the action to an automatic release link 220 installed to a carriage 3 and serving as an operated part, and a guide member 250 which is disposed in such a manner that, in a short link 12, a contact state with the automatic release link 220 varies following the lifting action by a lifting device 10.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a vehicle maintenance lift configured to move up and down a horizontally swingable swing arm having a vehicle support at the tip, and in particular, vehicle maintenance provided with a mechanism for automatically unlocking the swing arm. For lifts.

  2. Description of the Related Art Conventionally, vehicle maintenance lifts that are configured to move up and down horizontally swingable swing arms that have a vehicle support at the tip are widely used.

  This type of vehicle maintenance lift having a swing arm can be adapted to various vehicles by adjusting the angle of the swing arm. To lift the vehicle, first lower the swing arm to the lower limit, let the vehicle enter so as to straddle back and forth along the swing arm, and then adjust the angle so that the vehicle support is directly below the lift point. Thereafter, the carriage is raised to a point just before the vehicle support comes into contact with the vehicle, where it is confirmed that the vehicle support is surely aligned with the lift point, and finally the carriage is raised until the vehicle reaches a predetermined height. The swing arm is restrained so that it does not rotate unintentionally when lifted up. However, when adjusting the angle depending on the vehicle model, it is necessary to release the restraint of the operation so that the swing arm can turn. Therefore, in most car models, the operation to enable the swing arm operation by releasing the restraint and the angle adjustment of the arm must be performed at the same time while keeping an unstable posture so that it is crouched and looking under the vehicle. The workability is bad.

  Accordingly, various types of vehicle maintenance lifts have been proposed that are configured such that when the carriage is lowered to a predetermined height, the restraint of the swing motion is automatically released. For example, when the carriage is within a certain range on the lower limit side in a two-post type vehicle maintenance lift arm rotation stop device, the operated portion of the meshing body cooperates with the release portion on the lower side of the engagement / disengagement rod. When the carriage is set to a non-engagement position with the lock gear and the carriage is moved out of the predetermined range, the operated portion of the engagement body is engaged with the engagement portion on the upper side of the engagement / disengagement rod. There has been proposed a body that can be set at an engagement position with respect to a lock gear (see Patent Document 1). In this conventional lift for vehicle maintenance, the engagement / disengagement rod is vertically supported by the carriage and the operated portion of the meshing body so as to be relatively movable in a certain upper and lower range, and is urged downward by the urging means, When the carriage is within a certain range on the lower limit side, the lower end is pressed against the non-moving surface on the floor surface side, and when the carriage rises outside the certain range, it is suspended and supported by the carriage. It is stored inside.

  Also, a two-post lift for vehicle maintenance, provided between the carriage and the swing arm, a gear fixed to the base end portion of the swing arm coaxially with the shaft support portion of the swing arm, and provided on the carriage A swing arm motion restraint mechanism configured by a combination with a locking claw is provided, and the swing arm motion restraint mechanism is provided between a support rail and a carriage, a guide rail disposed along the support post, and a tip of the guide rail. There has been proposed one provided with a swing arm motion restraint releasing means constituted by a release lever to which a guide roller attached to the is pressed (see Patent Document 2).

Japanese Patent No. 4794034 Japanese Patent No. 3917443

  However, each of the above-described conventional techniques is suitable for a vehicle maintenance lift that raises and lowers a carriage along a column that is erected on a floor surface. There is a problem that it is not necessarily suitable for a vehicle maintenance lift of a type in which the carriage is moved up and down to raise and lower.

  For example, in the vehicle maintenance lift described in Patent Document 1, since the engagement / disengagement rod is long and protrudes below the carriage, the lift is applied to a vehicle maintenance lift in which a lifting device is configured by a link mechanism below the carriage. It may become an obstacle to maintenance work.

  In addition, when the structure of the vehicle maintenance lift described in Patent Document 2 is applied to a vehicle maintenance lift in which a lifting mechanism is configured by a link mechanism, it is necessary to provide a column for arranging the guide rail separately from the lifting mechanism. This may not only complicate the configuration but also hinder maintenance work.

  The present invention has been made in view of the above-described problems, and does not become an obstacle to maintenance work in a vehicle maintenance lift provided with a lifting device that lifts and lowers a link mechanism composed of a plurality of links. An object of the present invention is to provide a vehicle maintenance lift that can automatically switch between a locked state and a released state of a swing arm with a simple configuration.

  The invention according to claim 1, which has been made to achieve the above object, includes an elevating device (10) that performs an elevating operation by vertically expanding and contracting a link mechanism including a plurality of links, and an object to be moved up and down by the elevating device. A vehicle maintenance lift (1) comprising a lifting body (3) and a swing arm (30) which is provided with a vehicle support (31) at the tip and is pivotally supported with respect to the body to be lifted horizontally. ), The lock gear (102) provided coaxially with the shaft support (30a) of the swing arm on the body to be lifted and displaceable between a locked posture engaged with the lock gear and a released posture released from the lock gear A swing arm locking mechanism (100) configured to have a lock piece (104) provided on the body to be lifted so as to become, and a working part (220) provided on the body to be lifted A lock piece displacement mechanism (210) for displacing the lock piece between the lock posture and the release posture by the action of and a function of the action in association with a lifting operation by the lifting device in any of the plurality of links And a swing arm unlocking mechanism (200) configured to include a guide member (250) arranged so that a contact state with the portion changes, and the lock piece displacement mechanism is configured to lift and lower the lifting device. The lock piece is displaced between the lock posture and the release posture by the cooperation of the actuated portion and the guide member in accordance with the height of the body to be lifted and lowered by the operation.

  According to this configuration, the lock displacement mechanism having the actuated part is provided in the body to be lifted and the contact state of the guide member with the actuated part changes in accordance with the lifting operation of the lifting device in any of the plurality of links. Therefore, the lock piece displacement mechanism is associated with a change in the contact state between the operated portion and the guide member according to the height of the lifted body that is lifted and lowered by the lifting and lowering operation of the lifting device. By these cooperation, the lock piece can be displaced between the lock posture and the release posture. Therefore, in a vehicle maintenance lift equipped with a lifting device that lifts and lowers a link mechanism consisting of a plurality of links up and down, the swing arm can be locked and released with a simple configuration that does not hinder maintenance work. There is an effect that it can be switched automatically. Further, since the swing arm unlocking mechanism is operated by using the lifting operation by the lifting device using the link mechanism, there is an effect that it is not necessary to separately provide a drive unit for driving the swing arm unlocking mechanism. In addition, since the guide member is provided on any of the plurality of links constituting the link mechanism, there is no need to separately provide a guide member installation column or the like, which interferes with a vehicle door or the like and hinders maintenance work. There is an effect that can be prevented.

  According to a second aspect of the present invention, the lock piece displacement mechanism includes a connection member (212, 214) connected to the lock piece, and the connection member is urged toward the acting part. The acted part is a link member pivotally supported by the body to be lifted, and is a cam part (222) provided around the pivot axis and press-contacted by the connecting member. And an arm portion (224) that extends from the cam portion in an arm shape and changes a contact state with the guide member in accordance with an elevating operation by the elevating device, and the operated portion includes the elevating device The locking piece is turned to the locking posture and the releasing posture through the connecting member that is rotated by changing the contact state between the arm portion and the guide member in accordance with the lifting operation by Displace between.

  According to this configuration, the actuated portion is rotated by changing the contact state between the arm portion and the guide member in accordance with the lifting operation by the lifting device, and the lock piece is moved via the connecting member that press-contacts the cam portion. By displacing between the lock posture and the release posture, it is possible to automatically switch between the locked state and the released state of the swing arm and to provide a sharpness in the switching operation.

  According to a third aspect of the present invention, the guide member is configured to come into contact with the operated portion when the lifted body is positioned at a predetermined height (H1) or less, and the lock piece displacement mechanism includes: The lock piece is set to the release posture when the operated portion comes into contact with the guide member, and the lock piece is set to the lock posture when the operated portion is separated from the guide member.

  According to this structure, while the to-be-lifted body raises / lowers below a predetermined height, the locked portion is reliably held in the release posture by the operated portion coming into contact with the guide member. On the other hand, while the lifted body moves up and down above a predetermined height, the lock portion is securely held in the locked posture by separating the operated portion from the guide member.

  According to a fourth aspect of the present invention, the guide member is configured to contact the actuated portion when the lifted body is positioned below another predetermined height (H2) below the predetermined height. The surface to be actuated when the object to be lifted is positioned above the other predetermined height and below the predetermined height. The lock piece displacement mechanism includes a second guide surface (256) in contact with the first guide surface, and the lock piece displacement mechanism completely releases the lock piece from the lock gear while the actuated portion contacts the first guide surface. On the other hand, the lock piece is held in a transition posture between the completely released posture and the locked posture while the operated portion contacts the second guide surface.

  According to this configuration, while the body to be lifted is located below another predetermined height below the predetermined height, the operated portion comes into contact with the first guide surface, so that the lock piece is completely detached from the lock gear. It can be held in a fully released position. On the other hand, while the body to be lifted is located at a predetermined height higher than or equal to another predetermined height, the operated portion comes into contact with the tapered second guide surface, so that the lock piece is brought into a completely released posture and a locked posture. Since the transition posture is held, smooth switching can be realized by gradually displacing the lock piece between the complete release posture and the lock posture.

  According to a fifth aspect of the present invention, the lock piece displacement mechanism includes a manual release lever (213) that manually displaces the lock piece from the lock posture to the release posture.

  According to this configuration, the operator can move the lock piece from the locked posture to the released posture at an arbitrary timing by manually operating the manual release lever.

  According to a sixth aspect of the present invention, the lifting device has a λ-shaped link mechanism that intersects a short link (12) and a long link (14) that is longer than the short link. The guide member is disposed on the short link.

  According to this configuration, the guide member is arranged on the short link of the λ-shaped link mechanism, so that it is not necessary to provide a separate drive unit for driving the swing arm unlocking mechanism, and further interferes with the door of the vehicle. It is also possible to prevent the maintenance work from becoming an obstacle.

1 is a perspective view showing a vehicle maintenance lift according to an embodiment of the present invention from an oblique rear side (a carriage is an upper limit position and a swing arm is a storage position). 1 is a perspective view showing a vehicle maintenance lift from an oblique front (a carriage is an upper limit position and a swing arm is a storage position). FIG. 1 is a perspective view showing a vehicle maintenance lift from an oblique rear side (a carriage is an upper limit position and a swing arm is a rotation position). FIG. It is a perspective view which shows a lift for vehicle maintenance (a carriage is a minimum position). It is a side view (carriage is an upper limit position) which shows a lift for vehicle maintenance. It is a side view (carriage is a lower limit position) which shows a lift for vehicle maintenance. It is a top view which shows the swing arm lock mechanism and swing arm lock release mechanism in a swing arm lock release state. It is a top view which shows the swing arm lock mechanism and swing arm lock release mechanism in a swing arm lock state. It is a side view which shows a swing arm lock release mechanism when a carriage exists in a lower limit position. It is a side view which shows a swing arm lock release mechanism when a carriage raises 40 mm from a lower limit position. It is a side view which shows a swing arm lock release mechanism when a carriage raises 100 mm from a lower limit position. It is a side view which shows a swing arm lock release mechanism when a carriage raises 120 mm from a lower limit position. It is a side view which shows a swing arm lock release mechanism when a carriage raises 150 mm from a lower limit position. It is a side view which shows a swing arm lock release mechanism when a carriage exists in a lower limit position in a modification. It is a side view which shows a swing arm lock release mechanism when a carriage raises 150 mm from a minimum position in a modification.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a vehicle maintenance lift according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the vehicle maintenance lift 1 obliquely from the rear when the carriage 3 is in the upper limit position and the swing arm 30 is in the storage position in the present embodiment, FIG. FIG. 4 is a perspective view when the carriage 3 is in the lower limit position, FIG. 4 is a side view when the carriage 3 is in the upper limit position, and FIG. It is a side view when the carriage 3 is in a lower limit position.

  As shown in FIG. 1 and the like, the vehicle maintenance lift 1 according to this embodiment includes bases 2 and 2, carriages 3 and 3, and lifting devices 10 and 10. Since the bases 2 and 2, the carriages 3 and 3, and the lifting devices 10 and 10 are all symmetrical, only one of the common parts will be described below.

  The base 2 is formed in a rectangular frame having rail portions 2a, 2a along both sides, and includes a box 2b with a lid having a lid-like fixed pit cover 2c on an upper surface on the rear end side. The fixed pit cover 2c is accommodated and installed in the pit P that is recessed so as to coincide with the floor surface F. The box with lid 2b includes a movable pit cover 2d that slides between the lower side and the front side of the fixed pit cover 2c as the base end portion 14a of the long link 14 moves. In FIG. 1, the fixed pit cover 2c and the movable pit cover 2d are not shown in order to illustrate the inside of the box with lid 2b.

  The carriage 3 is a flat body to be lifted and lowered by the lifting device 10. On both sides sandwiching the central portion in the longitudinal direction of the carriage 3, base end portions having semicircular end surfaces in the pair of swing arms 30 and 30 are pivotally supported by the shaft support portions 30a and 30a so as to be horizontally rotatable. The carriage 3 has a substantially T-shape in which the inner side in the width direction is cut out along a part of the outer shape of the pair of swing arms 30 and 30 from the rectangular shape in plan view, and the size in the width direction is equal to that of the lifting device 10. And a pair of swing arms 30 is housed in the width direction region. The swing arm 30 can be adjusted to an arbitrary length by expanding and contracting by sliding the extension arm 30b, and a vehicle support 31 is provided at the tip. In addition, the carriage 3 is provided with swing arm lock mechanisms 100 and 100 that lock the rotation of each swing arm 30 and swing arm lock release mechanisms 200 and 200 that release the swing arm lock mechanism. The configurations of the swing arm lock mechanism 100 and the swing arm lock release mechanism 200 will be described later.

  The lifting device 10 is a device that lifts and lowers the carriage 3 by vertically expanding and contracting a so-called λ-shaped link mechanism formed by intersecting a short link and a long link longer than the short link. More specifically, the lifting device 10 includes a short link 12, a long link 14, a lifting 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 short link 12 has a base end portion 12 a that is pivotally supported by a shaft support portion 11 at a front end portion of the base 2. The short link 12 intersects with the long link 14 at the distal end portion 12 b, and the distal end portion 12 b is pivotally supported by the shaft support portion 13 at the intermediate portion of the long link 14. The short link 12 extends linearly from the proximal end portion 12 a toward the distal end portion 12 b and is bent upward in the vicinity of the distal end portion 12 b intersecting with the long link 14. Further, the short link 12 is formed in a box shape surrounded by a square shape by four plate-like members composed of a pair of left and right link plates 12p and a pair of front and rear reinforcing plates 12q, thereby improving rigidity. Is planned.

  The long link 14 is a link member corresponding to a long link in a so-called λ-shaped link mechanism, and is longer than the short link 12. The long link 14 is composed of a pair of left and right link plates, and a distal end portion 14b which is an upper end during lift-up is pivotally supported by a distal end portion of the elevating link 16 by a pivot support portion 15 and intersects the short link 12 in a λ shape at an intermediate portion. The shaft 12 is pivotally supported by the tip portion 12 b of the short link 12. The long link 14 has a guide roller 14g rotatably attached to the base end portion 14a, and the guide roller 14g rolls on the rail portions 2a and 2a of the base 2. The rail portion 2a is formed in a correction curve shape whose central portion curves downward. When the base end portion 14a of the long link 14 moves up and down along the rail portion 2a having the correction curve shape, the carriage 3 can maintain a horizontal posture without being inclined in the lifting operation.

  The elevating link 16 is a member that fixes and horizontally supports the carriage 3 on the upper surface, and the size in the width direction is equal to or less than that of the carriage 3. The lifting link 16 is supported at the front end by the shaft support 17 at one end of the support rod 18, and the rear end at the rear side supporting the carriage 3 on the upper surface is pivoted at the tip 14 b of the long link 14. It is pivotally supported by the support 15.

  The support rod 18 is a rod-shaped member, one end of which is pivotally supported by the shaft support 17 on the base end of the elevating link 16, and the other end is based on the shaft support 13 with the long link 14 in the short link 12. It is pivotally supported by a pivotal support portion 18a at a portion near the end 12a.

  The cylinder 20 is a single rod hydraulic cylinder, and includes a bottomed cylindrical cylinder tube 22 and a piston rod 24 that can be reciprocated by hydraulic pressure with respect to the cylinder tube 22. The cylinder 20 is pivotally supported by a shaft support portion 20a at one end, which is the bottom side of the cylinder tube 22, at a position closer to the base end portion 12a than the shaft support portion 13 of the short link 12 with the long link 14, and the rod of the piston rod 24 The other end, which is the end side, is pivotally supported by the base end portion 14 a of the long link 14. Between the cylinder 20 and the long link 14, a fall prevention mechanism 19 including a rack 19a provided on both sides of the cylinder 20 and a locking member 19b for locking the rack 19a is provided. The fall prevention mechanism 19 ensures safety even if the hydraulic pressure of the cylinder 20 is reduced. Further, a cylinder cover 21 is provided so as to cover the cylinder 20, and the lidded box 2 b is moved in and out as the lifting device 10 moves up and down.

  Next, the configuration of the swing arm lock mechanism 100 and the swing arm lock release mechanism 200 will be described with reference mainly to FIGS. 7 is a plan view showing the swing arm lock mechanism 100 and the swing arm lock release mechanism 200 in the swing arm lock release state, and FIG. 8 is a plan view showing the swing arm lock mechanism 100 and the swing arm lock release mechanism 200 in the swing arm lock state. FIG. 9 is a side view showing the swing arm unlocking mechanism 200 when the carriage 3 is at the lower limit position. The swing arm lock mechanism 100 is a mechanism that prevents the swing arm 30 from rotating, and is provided between the swing arm 30 and the carriage 3 in the shaft support portion 30 a of the swing arm 30. The swing arm lock mechanism 100 is configured to include a lock gear 102 that is coaxial with the shaft support portion 30 a and is fixed to the swing arm 30, and a lock piece 104 that is provided on the carriage 3 and meshes with the lock gear 102.

  The lock gear 102 has an arc shape that covers the rotation angle of the swing arm 30. The lock piece 104 has teeth that mesh with the teeth of the lock gear 102 at the tip, and is guided by a guide block 106 fixed to the carriage 3 so as to be able to advance and retract in the left-right direction (the carriage 3 width direction) toward the shaft support portion 30a. Has been.

  The swing arm lock release mechanism 200 is a mechanism for switching the swing arm 30 between a locked state and a released state, and includes a lock piece displacement mechanism 210 provided on the carriage 3 and a guide member 250 provided on the short link 12. It is prepared for.

  The lock piece displacement mechanism 210 is a mechanism provided on the carriage 3 for displacing the lock piece 104 between the lock posture and the release posture. The lock piece displacement mechanism 210 includes a connecting piece 212, a release rod 214, a rod guide 216, a spring 218, and an automatic release link 220.

  The connecting piece 212 is a member that connects the lock piece 104 and the release rod 214, one end of which is pivotally supported on the base end of the lock piece 104, and the other end is turned on the base end of the release rod 214. It is supported freely.

  The manual release lever 213 is a lever for manually switching the swing arm 30 from the locked state to the released state when the operator grips and operates the hand, and is attached to the side surface of the connecting piece 212. The manual release lever 213 is manually rotated to a second position close to the shaft support portion 30a in the locked state where the front end of the manual release lever 213 is located at the first position separated from the shaft support portion 30a (see FIG. 7). The lock piece 104 can be detached from the lock gear 102 via the connecting piece 212 and switched to the released state.

  The release rod 214 is a rod-shaped member that is slidably housed in the rod guide 216 in the front-rear direction (longitudinal direction of the carriage 3), and whose tip side is pressed against the automatic release link 220 by the biasing force of the spring 218. . The release rod 214 is pivotally supported at the base end at the other end of the connecting piece 212, and a guide roller 214a is pivotally supported at the distal end. The guide roller 214a is pressed against the cam portion 222 of the automatic release link 220, and rolls on the lock cam surface 222a and the release cam surface 222b as the carriage 3 moves up and down.

  The rod guide 216 is a cylindrical member disposed in the front-rear direction (longitudinal direction of the carriage 3), and the release rod 214 is slidably accommodated therein. The spring 218 is disposed inside the rod guide 216. The release rod 214 is biased toward the automatic release link 220 via the spring 218, whereby the guide roller 214 a at the tip is pressed against the cam portion 212 and the lock piece 104 is locked via the connecting piece 212. Displace between the posture and the release posture.

  The automatic release link 220 is a link member that is rotatably supported on the side surface of the carriage 3 by a rotation shaft 220 a and whose contact state changes with respect to the guide member 250 according to the height of the carriage 3. The automatic release link 220 includes a cam portion 222 and an arm portion 224.

  The cam portion 222 is a portion that is provided around the rotation shaft 220 a and is in pressure contact with the release rod 214. The cam portion 222 is provided with a smaller diameter lock cam surface 222a, 222a for holding the lock piece 104 in a locked posture via the release rod 214, and a larger diameter continuous with the lock cam surface 222a, 222a. Are provided with release cam surfaces 222b and 222b. The two lock cam surfaces 222a and 222a are formed diagonally across the rotation shaft 220a, and the lock cam surface 222a on the front side of the rotation shaft 220a functions as a part of the lock piece displacement mechanism 210 on the front side. The rear lock cam surface 222a functions as a part of the rear lock piece displacement mechanism 210. Similarly, the two release cam surfaces 222b and 222b are also formed diagonally across the rotation shaft 220a.

  The arm portion 224 is an arm-shaped portion that extends in a U-shape from the cam portion 222. The arm 224 has a guide roller 224a rotatably provided at the tip. The guide roller 224a moves away from or contacts the guide member 250 provided on the short link 12 according to the height of the carriage 3 that is lifted and lowered by the lifting device 10.

  The guide member 250 is arranged at a position that intersects with the movement locus of the automatic release link 220 accompanying the lifting operation of the lifting device 10 in the middle of the base end portion 12 a of the short link 12 and the shaft support portion 13 with the long link 14. Yes. The guide member 250 is configured to come into contact with the automatic release link 220 (specifically, the guide roller 224a) when the carriage 3 is positioned below the predetermined height H1 from the lower limit position. Here, the predetermined height H1 is set to about 150 mm, for example. The guide member 250 includes a rectangular plate-shaped main body portion 252, a first guide surface 254 projecting in the left-right direction (carriage 3 width direction) on the front surface of the main body portion 252, and a left-right direction (carriage 3 width direction) on the upper surface of the main body portion 252. And a second guide surface 256 projecting over.

  The first guide surface 254 is a guide surface that contacts the automatic release link 220 when the carriage 30 is located below another predetermined height H2 below the predetermined height H1. The first guide surface 254 is formed in a flat plate shape extending in a direction orthogonal to the longitudinal direction of the short link 12. The other predetermined height H2 is set to about 120 mm, for example.

  The second guide surface 256 is a guide surface that is formed continuously with the first guide surface 254 and comes into contact when the carriage 30 is located at another predetermined height H2 or more and a predetermined height H1 or less. The second guide surface 256 is a flat taper surface inclined at a predetermined angle with respect to the first guide surface 254 with respect to the longitudinal direction of the short link 12.

  Next, the raising / lowering operation | movement of the raising / lowering apparatus 10 in the lift 1 for vehicle maintenance is demonstrated. When the cylinder 20 is extended to the longest, the carriage 3 is in a lift-down state in which the carriage 3 is lowered to the lower limit position as shown in FIGS. At this time, the lifting device 10 is completely accommodated in the pit P, and the upper surface of the pit P is covered with the carriage 3 and the swing arms 30 and 30 and is substantially flush with the floor surface F.

  When the cylinder 20 is contracted from the lift-down state, the guide roller 14g rolls to the front end side along the rail portions 2a and 2a. As a result, the long link 14 rotates clockwise around the shaft support portion 13 in FIGS. 5 and 6, and the opening with the short link 12 below the shaft support portion 13 is reduced and the long link 14 is The leading end portion 14b is raised, and the carriage 3 fixed to the upper surface of the lifting link 16 is raised accordingly. At this time, since the guide roller 14g moves along the rail portions 2a and 2a having the correction curve, the carriage 3 rises while maintaining a horizontal state.

  When the cylinder 20 contracts to the shortest length, as shown in FIGS. 1, 3 and 5, the carriage 3 is lifted up from the floor surface F to the upper limit. At this time, the guide roller 14a is moved to the rail portions 2a and 2a. Has moved to the front edge of In this state, the short link 12 and the long link 14 have a minimum opening below the shaft support portion 13.

  Next, operations of the swing arm lock mechanism 100 and the swing arm lock release mechanism 200 accompanying the lifting operation of the lifting device 10 will be described with reference to FIGS. 7 to 13. 9 is a side view showing the swing arm unlocking mechanism 200 when the carriage 3 is at the lower limit position, FIG. 10 is a side view when the carriage 3 is raised 40 mm from the lower limit position, and FIG. 11 is 100 mm from the lower limit position. FIG. 12 is a side view when the carriage 3 is raised 120 mm from the lower limit position, and FIG. 13 is a side view when the carriage 3 is raised 150 mm from the lower limit position.

  When the carriage 3 is at the lower limit position, the short link 12 is in a horizontal posture as shown in FIG. In this state, the first guide surface 254 extending in a direction orthogonal to the longitudinal direction of the short link 12 is in a posture close to vertical. In the automatic release link 220, the guide roller 224 a at the tip of the arm portion 224 is in contact with the lower end of the first guide surface 254. Further, the release cam surface 222 b of the cam portion 222 is in contact with the guide roller 214 a at the tip of the release rod 214. For this reason, the release rod 214 pressed by the large-diameter release cam surface 222b is located farthest from the rotation shaft 220a of the automatic release link 220 in the front-rear direction against the urging force of the spring 218. At this time, the lock piece 104 is pulled completely by the connecting piece 212 connected to the base end of the release rod 214 to be completely released from the lock gear 102, and the lock of the swing arm 30 is completely released. It is in the state.

  When the carriage 3 is raised from the lower limit position to a height of 40 mm (see FIG. 10), the automatic release link 220 has the guide roller 224a at the tip of the arm 224 in contact with the middle in the vertical direction of the first guide surface 254. At this time, the lock piece 104 is pulled completely by the connecting piece 212 to be completely released from the lock gear 102, and the state where the swing arm 30 is completely unlocked is maintained.

  Subsequently, when the carriage 3 further rises from the lower limit position to a height of 100 mm (see FIG. 11), the automatic release link 220 has the guide roller 224a at the tip of the arm portion 224 in contact with the upper portion of the first guide surface 254. . At this time, the lock piece 104 is pulled by the connecting piece 212 and completely disengages from the lock gear 102, and the state where the lock of the swing arm 30 is completely released is maintained. In this state, the operator performs an operation of setting the vehicle support 31 at a predetermined position in the lower part of the vehicle by rotating the swing arm 30 or extending / contracting the extension arm 30b.

  Subsequently, when the carriage 3 is further raised from the lower limit position to a height of 120 mm (see FIG. 12), the automatic release link 220 has the guide roller 224a at the tip of the arm 224 in contact with the upper end of the first guide surface 254. . At this time, the lock piece 104 is pulled by the connecting piece 212 and completely disengages from the lock gear 102, and the state where the lock of the swing arm 30 is completely released is maintained. The vehicle is supported by the vehicle support 31 of the swing arm 30 set at a predetermined position below and starts to rise.

  Subsequently, when the carriage 3 is further raised, the automatic release link 220 transitions from a state in which the guide roller 224a at the tip of the arm portion 224 is in contact with the first guide surface 254 to a state in which the guide roller 224a is in contact with the second guide surface 256. As the carriage 3 rises, the guide roller 224a rolls on the second guide surface 256, and the automatic release link 220 rotates counterclockwise in FIG. As a result, the cam portion 222 is moved from the large-diameter release cam surface 222b to the small-diameter lock cam surface 222a at the contact position of the release rod 214 with the guide roller 214a. For this reason, the release rod 214 slides and moves in the direction approaching the rotation shaft 220a of the automatic release link 220 in the front-rear direction by the biasing force of the spring 218. Accordingly, the lock piece 104 is pressed toward the lock gear 102 by the connecting piece 212 connected to the base end of the release rod 214 and gradually meshes.

  When the carriage 3 is at a position 150 mm above the lower limit (see FIG. 13), the guide roller 224a is in contact with the rear end of the second guide surface 256. The cam portion 222 is in contact with the guide roller 214a at the tip of the release rod 214 on the small diameter lock cam surface 222a. The release rod 214 is in the state closest to the rotation shaft 220a of the automatic release link 220 by the biasing force of the spring 218. For this reason, the lock piece 104 is pressed toward the lock gear 102 by the connecting piece 212 connected to the base end of the release rod 214, and the swing arm 30 is locked.

  When the carriage 3 is raised higher than 150 mm from the lower limit position, the guide roller 224 a at the tip of the arm portion 224 of the automatic release link 220 is separated from the second guide surface 256. The automatic release link 220 maintains the posture shown in FIG. 13, the release rod 214 is positioned closest to the rotation shaft 220 a of the automatic release link 220 by the biasing force of the spring 218, and the lock piece 104 is connected by the connecting piece 212. Since the lock gear 102 is pressed and meshed, the swing arm 30 is kept locked.

  As is clear from the above detailed description, the vehicle maintenance lift 1 of the present embodiment is lifted and lowered by the lifting device 10 that lifts and lowers the link mechanism composed of a plurality of links, and the lifting device 10. And a swing arm 30 that is provided with a vehicle support 31 at the tip and is pivotally supported by the carriage 3 so as to be horizontally rotatable, and is coaxial with the shaft support 30 a of the swing arm 30 on the carriage 3. A swing arm lock mechanism configured to include a lock gear 104 provided and a lock piece 104 provided to the carriage 3 so as to be displaceable between a lock posture meshed with the lock gear 102 and a release posture released from the lock gear 102. 100 and the locking piece provided by the action on the automatic release link 220 as the actuated portion provided on the carriage 3 The lock piece displacement mechanism 210 that displaces 04 between the lock posture and the release posture, and the guide that is arranged so that the contact state with the automatic release link 220 in the short link 12 changes with the lifting operation by the lifting device 10. A swing arm lock release mechanism 200 having a member 250, and the lock piece displacement mechanism 210 is an automatic release link 220 according to the height of the carriage 3 that is lifted and lowered by the lifting and lowering operation of the lifting device 10. And the guide member 250 cooperate to displace the lock piece 104 between the lock posture and the release posture.

  According to this configuration, the lock displacement mechanism 210 having the automatic release link 220 is provided in the carriage 3, and the guide member 250 is in contact with the automatic release link 220 in the short link 12 as the lifting device 10 moves up and down. Since the lock piece displacement mechanism 210 is arranged so as to change, the contact state between the automatic release link 220 and the guide member 250 changes according to the height of the carriage 3 that is lifted and lowered by the lifting and lowering operation of the lifting device 10. As a result, the lock piece 104 can be displaced between the lock posture and the release posture by these cooperation. Therefore, in the vehicle maintenance lift 1 provided with the lifting device 10 that lifts and lowers the link mechanism composed of a plurality of links up and down, the swing arm 3 is locked and released with a simple configuration that does not hinder maintenance work. There is an effect that the state can be automatically switched. In addition, since the swing arm unlocking mechanism 200 is operated by using the lifting operation by the lifting device 10 using the link mechanism, there is no need to separately provide a drive unit for driving the swing arm unlocking mechanism 200. Play. In addition, since the guide member 250 is provided on the short link 12 which is one of a plurality of links constituting the link mechanism, it is not necessary to separately provide a support post for installing the guide member 250, and it interferes with a vehicle door or the like. This prevents the maintenance work from becoming an obstacle.

  The lock piece displacement mechanism 210 includes a connection piece 212 and a release rod 214 as connection members connected to the lock piece 104, and the release rod 214 is configured to be biased toward the automatic release link 220. The automatic release link 220 is a link member that is pivotally supported by the carriage 3. The automatic release link 220 is provided around the rotation shaft and is press-contacted by a connecting member. And an arm portion 224 whose contact state with the guide member 250 changes as the elevating operation is performed by the elevating device 10, and the automatic release link 220 is connected to the arm portion 224 as the elevating operation is performed by the elevating device 10. The release rod 214 that is rotated by the change of the contact state with the guide member 250 and press-contacts the cam portion 222 causes the lock piece 104 to move through the connecting piece 212. Tsu is displaced between the click position and a release position.

  According to this configuration, the automatic release link 220 is rotated by changing the contact state between the arm portion 224 and the guide member 250 as the elevator device 10 moves up and down, and the release rod 214 presses against the cam portion 222. In addition, by displacing the lock piece 104 between the lock posture and the release posture via the connecting piece 212, the swing state of the swing arm 30 can be automatically switched and the switching operation is sharpened. There is an effect that it can be provided.

  Further, the guide member 250 is configured to come into contact with the automatic release link 220 when the carriage 3 is positioned below the predetermined height H1, and the lock piece displacement mechanism 210 has the automatic release link 220 in contact with the guide member 250. As a result, the lock piece 104 is set to the release posture, and the automatic release link 220 is separated from the guide member 250 to set the lock piece 104 to the lock posture.

  According to this configuration, the lock piece 104 is reliably held in the release posture by the automatic release link 220 coming into contact with the guide member 250 while the carriage 3 moves up and down at a predetermined height H1 or less. On the other hand, while the carriage 3 moves up and down above the predetermined height H1, the automatic release link 220 is separated from the guide member 250, so that the lock piece 104 is reliably held in the locked posture.

  In addition, the guide member 250 has a first guide surface 254 that contacts the automatic release link 220 and a first guide surface 254 when the carriage 3 is positioned below another predetermined height H2 below the predetermined height H1. And a second guide surface 256 that comes into contact with the automatic release link 220 when the carriage 3 is positioned at a predetermined height H2 or more and a predetermined height H1 or less. While the automatic release link 220 contacts the first guide surface 254, the displacement mechanism 210 holds the lock piece 104 in a fully released posture in which it is completely detached from the lock gear 102, while the automatic release link 220 is in the second guide surface 256. While in contact with the lock piece 104, the lock piece 104 is held in the transition posture between the completely released posture and the locked posture.

  According to this configuration, while the carriage 3 is positioned below the other predetermined height H2 below the predetermined height H1, the automatic release link 220 contacts the first guide surface 254, so that the lock piece 104 is locked to the lock gear. It is possible to maintain a completely released posture completely detached from 102. On the other hand, while the carriage 3 is positioned at the other predetermined height H2 or more and the predetermined height H1 or less, the automatic release link 220 is brought into contact with the tapered second guide surface 256, so that the lock piece 104 is brought into the complete release posture. Since the transition posture to the lock posture is maintained, the lock piece 104 can be gradually displaced between the complete release posture and the lock posture to achieve smooth switching.

  Further, the lock piece displacement mechanism 210 includes a manual release lever 213 that manually displaces the lock piece 104 from the lock posture to the release posture.

  According to this configuration, the operator can operate the manual release lever 213 manually to displace the lock piece 104 from the lock posture to the release posture at an arbitrary timing.

  The lifting device 10 has a λ-shaped link mechanism that intersects the short link 12 and the long link 14 longer than the short link 12, and the guide member 250 is attached to the short link 12. Has been placed.

  According to this configuration, since the guide member 250 is disposed on the short link of the λ-shaped link mechanism, there is no need to separately provide a drive unit for driving the swing arm unlocking mechanism 200, and the vehicle door or the like. There is an effect that it is possible to prevent interference from interfering with maintenance work.

  The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the present invention. Although the example which employ | adopted (lambda) link mechanism as the raising / lowering apparatus 10 was shown in the said embodiment, it is not restricted to this. The lifting device 10 may be a device that performs a lifting operation by vertically expanding and contracting a link mechanism composed of a plurality of links. For example, the lifting device 10 may be configured to employ an X-shaped link mechanism, and the X-shaped link mechanism is arranged in two upper and lower stages. It is good also as a structure which employ | adopts the pantograph type | formula link mechanism comprised overlapping.

  Moreover, although the example which provided the automatic cancellation | release link 220 as the to-be-acted part of the lock piece displacement mechanism 210 was shown in the said embodiment, it is not restricted to this. For example, as shown in FIGS. 14 and 15, the automatic release link 220 may be eliminated from the lock piece displacement mechanism 210. FIG. 14 is a side view showing the swing arm unlocking mechanism 200 when the carriage 3 is at the lower limit position in a modified example, and FIG. 15 is a side view showing the swing arm unlocking mechanism 200 when the carriage 3 is raised 150 mm from the lower limit position. It is. In the modification, the automatic release link 220 is eliminated, and an arrowhead-shaped guide member 260 is provided on the short link 12 instead of the guide member 250. The guide member 260 includes a plate-shaped main body 262, a first guide surface 264 that is provided on both sides of the upper portion of the main body 262 and becomes vertical when lifted down, and a triangular second guide having tapered surfaces on both sides of the center of the upper surface. Surface 266. The guide member 260 is disposed at a position that intersects the movement trajectory of the guide rollers 214a and 214a accompanying the lifting operation of the lifting device 10 in the middle of the base end portion 12a of the short link 12 and the shaft support portion 13 with the long link 14. ing. The guide member 260 drives the release rod 214 back and forth via the guide roller 214a by moving up and down the gap between the pair of release rods 214 in accordance with the lifting operation of the lifting device 10.

  According to this modification, the guide member 260 is configured to come into contact with the guide roller 214a as the operated portion when the carriage 3 is positioned at a predetermined height (H1) or less. Then, the lock piece displacement mechanism 210 sets the lock piece 104 in the fully released posture by the guide roller 214a coming into contact with the first guide surface 262, and takes the complete release posture while the guide roller 214a comes into contact with the second guide surface 264. The lock piece 104 is set to the lock posture by being held in the transition posture from the lock posture and being separated from the guide member 260. Also in this modification, the same effect as the above-mentioned embodiment can be produced.

  In the above embodiment, the height of the carriage 3 when the automatic release link 220 contacts the second guide surface 256 of the guide member 250 is 120 mm or more and 150 mm or less, and the carriage 3 when the automatic release link 220 contacts the first guide surface 254 is used. Although the height is set to less than 120 mm, these can be implemented with appropriate changes according to the specifications.

  Moreover, although the example which applied this invention to the lift for vehicle maintenance only for swing arms which provided the swing arm in the carriage 3 was shown in the said embodiment, it is not restricted to this. For example, the present invention may be applied to a vehicle maintenance lift that serves both as a plate type and an arm type including a plate on which a vehicle is placed and a swing arm attached to the plate via a bracket. In this case, the plate and the bracket correspond to the lifted body of the present invention.

1 Lift for vehicle maintenance 3 Carriage
DESCRIPTION OF SYMBOLS 10 Lifting device 12 Short link 14 Long link 30 Swing arm 30a Shaft support 31 Vehicle holder 102 Lock gear 104 Lock piece 200 Swing arm lock release mechanism 210 Lock piece displacement mechanism 212 Connection piece (connection member)
213 Manual release lever 214 Release rod (connection member)
214a Guide roller (acting part in modification)
220 Automatic release link (acting part)
222 cam portion 222a lock cam surface 222b release cam surface 224 arm portion 250 guide member 254 first guide surface 256 second guide surface 260 guide member (modified example)
H.264 First Guide Surface (Modification)
266 Second guide surface (modified example)

Claims (6)

A lifting device (10) that moves up and down by extending and contracting a link mechanism composed of a plurality of links, a body to be lifted and lowered by the lifting device (3), and a vehicle support (31) at the tip. In a vehicle maintenance lift (1) comprising: a swing arm (30) pivotally supported so as to be horizontally rotatable with respect to the lifted body;
The lock gear (102) provided coaxially with the shaft support (30a) of the swing arm on the lifted body, and being displaceable between a locked posture engaged with the lock gear and a released posture released from the lock gear. A swing arm lock mechanism (100) configured to include a lock piece (104) provided on the body to be lifted
A lock piece displacement mechanism (210) provided on the lifted body to displace the lock piece between the lock posture and the release posture by acting on the actuated portion (220, 214a), and the plurality of links And a swing arm unlocking mechanism (200) configured to include a guide member (250) arranged so that a contact state with the actuated portion changes in accordance with a lifting operation by the lifting device. ,
With
The lock piece displacement mechanism is configured such that the lock piece is moved in the lock posture and in cooperation with the operated portion and the guide member according to the height of the lifted body that is lifted and lowered by the lifting and lowering operation of the lifting device. Vehicle maintenance lift that is displaced between the release position. The lock piece displacement mechanism includes connecting members (212, 214) connected to the lock piece,
The connecting member is configured to be biased toward the affected part,
The acted part is a link member pivotally supported by the lifted body, the cam part (222) provided around the pivot shaft and pressed by the connecting member, and the cam An arm portion (224) that extends in an arm shape from the portion and changes a contact state with the guide member in accordance with a lifting operation by the lifting device,
The actuating portion is rotated by changing a contact state between the arm portion and the guide member in accordance with an elevating operation by the elevating device, and the lock piece is interposed through the connecting member that press-contacts the cam portion. The vehicle maintenance lift according to claim 1, wherein the lift is displaced between the lock posture and the release posture. The guide member is configured to come into contact with the actuated portion when the lifted body is positioned below a predetermined height (H1).
The lock piece displacement mechanism is configured such that the lock piece is brought into the release posture when the operated portion comes into contact with the guide member, and the lock piece is brought into the lock posture when the operated portion is separated from the guide member. The vehicle maintenance lift according to claim 1 or 2. The guide member includes a first guide surface (254) that comes into contact with the operated portion when the body to be lifted is positioned below another predetermined height (H2) below the predetermined height; A second guide surface (256) that is provided so as to be inclined in a tapered shape with respect to the guide surface, and that comes into contact with the operated portion when the body to be lifted is located above the other predetermined height and below the predetermined height. The lock piece displacement mechanism holds the lock piece in a completely released posture in which the lock piece is completely detached from the lock gear while the operated portion is in contact with the first guide surface. 4. The vehicle maintenance lift according to claim 3, wherein the lock piece is held in a transition posture between the complete release posture and the lock posture during contact with the second guide surface.   The vehicle maintenance lift according to any one of claims 1 to 4, wherein the lock piece displacement mechanism includes a manual release lever (213) for manually displacing the lock piece from the lock posture to the release posture. The lifting device has a λ-shaped link mechanism that intersects a short link (12) and a long link (14) longer than the short link,
The vehicle maintenance lift according to any one of claims 1 to 5, wherein the guide member is disposed on the short link.

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