JP2006069790A - Automobile body lifter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automobile body lifter, capable of stably and safely lift an automobile body, eliminating provision of a pit for housing the lifter in a pit from an assembly line to easily change the layout of the assembly line, and tilting the automobile body forward and backward to facilitate work. <P>SOLUTION: This automobile body lifter 10 lifts an automobile body carried to an assembly zone on an assembly line for automobiles by a plurality of lifters 100 installed below. The lifter 100 is composed of a lifting mechanism 110 to horizontally push/pull one end part of a chain 111 by a ball screw type linear actuation machine 113 to lift it as the other end part of the chain 111 is vertically deflected to stand vertically, and a link mechanism 120 to support the other end part of the chain 111 for guiding it to make it stand vertically. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle body lifting device used in an automobile assembly line, and more particularly to a vehicle body lifting device that has a low machine height and is compact and does not require a pit for housing the lifting device in the assembly line.

  Conventionally, as an automobile body lifting device used in an automobile assembly line, a scissors type lifter that drives a cross link mechanism provided on a lifting platform with a hydraulic cylinder or the like, and moves the automobile body up and down horizontally during work. is there.

  In addition, a lifting device using a lifter having a table fixed to one end of a chain that is housed in a horizontal direction and is drawn out by a sprocket that can rotate forward and backward and that moves up and down independently in the vertical direction is also used as a vehicle part conveying means. It is used in a line (see Patent Document 1).

Furthermore, the lifting platform is fixed to a chain that is housed in a horizontal direction and is drawn up by a ball screw type linear actuator and is independently raised and lowered in the vertical direction. There is also a lifter that is provided and transports a box containing a pachinko ball or the like (see Patent Document 2).
JP 2002-284491 A JP 11-49487 A

  However, in the automobile body lifting device using the scissor type lifter as described above, the crossing angle of the cross-link mechanism is maximized at the initial lifting state, that is, at the lowest position of the lifting platform, and the component force that raises the lifter is maximized. Therefore, since it is necessary to set the driving force in accordance with such an initial raising / lowering state, an increase in the size of the driving mechanism such as hydraulic pressure is inevitable, and therefore a pit for accommodating the raising / lowering device must be provided in the assembly line. In addition, there is a problem that the layout of the assembly line cannot be easily changed. In addition, in order to raise the automobile body horizontally during work, the worker must work by submerging under the automobile body. There is also a problem that it takes.

  In the lifter using the above-described chain that is self-supporting in the vertical direction, there is no problem of component force unlike the scissors type lifter, so the drive source can be reduced in size, but the table on which the article is placed is moved up and down horizontally. The lifter is used alone, and when a heavy object such as a vehicle body is raised or lowered, there is a possibility that the chain that moves up and down independently may buckle, resulting in a lack of stability and safety.

  Therefore, the problem to be solved by the present invention, that is, the object of the present invention is to solve the problems of the prior art as described above. It is an object of the present invention to provide an automobile body lifting apparatus that can easily change the layout of an assembly line without providing a pit to be accommodated in the assembly line, and that facilitates the work by tilting the automobile body in the front-rear direction during the work.

  First, the invention according to claim 1 is an automobile body lifting apparatus that lifts and lowers an automobile body that has been transferred to an assembly zone on an automobile assembly line by a plurality of lifters that are installed below. A lifting mechanism that pushes and pulls one end of the chain in a horizontal direction with an actuator and deflects the other end of the chain in the vertical direction so as to move up and down while supporting the other end of the chain and supports the other end of the chain in the vertical direction The above-described problem is solved by a link mechanism that is guided independently.

  According to a second aspect of the present invention, there is provided an automobile body lifting apparatus according to the first aspect of the invention, wherein the lifter includes a ball screw type linear actuator that operates individually and is disposed at the front and rear positions of the automobile body. By configuring the body to be tilted up and down in the front-rear direction, the above problem is solved.

  Furthermore, the automobile body lifting apparatus according to claim 3 is the invention according to claim 1 or claim 2, wherein each chain constituting a part of the lifter disposed in front of and behind the automobile body includes The above-mentioned problem is solved by arranging symmetrically so as to be pushed out in the front-rear direction.

The present invention having the above-described configuration can provide the following specific effects.
That is, according to the first aspect of the present invention, the plurality of lifters for raising and lowering the vehicle body pushes and pulls one end of the chain in the horizontal direction by a ball screw type linear actuator and deflects the other end of the chain in the vertical direction. As a result, it is possible to reduce the height of the lifter and reduce the height of the lifter by using a link mechanism that supports the other end of the chain and guides it in the vertical direction. Since it is not necessary to provide a pit for accommodating the device in the automobile assembly line, the layout of the automobile assembly line can be freely set, the layout can be easily changed after the setting, and the lifter interval can be easily changed according to the vehicle type.

  In addition, since the link mechanism can prevent the chain from rattling during lifting, even a heavy object such as an automobile body can be safely and stably lifted without buckling of the chain during lifting. .

  In the vehicle body lifting apparatus according to the second aspect of the present invention, the lifter includes a ball screw type linear actuator that operates individually and is disposed at the front and rear positions of the vehicle body so that the vehicle body tilts up and down in the front-rear direction. By being configured, in addition to the effect of the invention according to claim 1 described above, the worker can access the body in a comfortable posture from the front side or the rear side of the lifted automobile body, thereby improving workability. be able to.

  Furthermore, the vehicle body lifting apparatus according to claim 3 is symmetrical in the front-rear direction so that each chain constituting a part of the lifter disposed at the front and rear of the vehicle body is pushed out in the front-rear direction of the vehicle body. By being arranged, in addition to the effect of the invention according to the first or second aspect described above, the distance between the fulcrums for supporting the automobile body becomes long, so that the automobile body can be moved up and down stably.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front sectional view of the automobile body lifting apparatus of the present embodiment, FIG. 2 is a front sectional view of the lifter of the present embodiment, and FIG. 3 is a perspective view of the lifter of the present embodiment. 4 is a perspective view of a pair of lifters of the present embodiment, and FIG. 5 is an explanatory diagram of the present embodiment.

  First, as shown in FIGS. 1 and 2, the automobile body lifting apparatus 10 of the present invention includes a plurality of lifters 100 that support the front and rear of the automobile body B so as to raise and lower the automobile body B that has been transported through the automobile assembly line. Each lifter 100 includes an elevating mechanism 110 that elevates and lowers in a state where one end 111a of the chain 111 is pushed and pulled in the horizontal direction and the other end of the chain 111 is deflected in the vertical direction to be independent. The chain mechanism 120 includes a link mechanism 120 that supports the other end portion 111b and guides the other end portion 111b in the vertical direction. The lifters 100 are arranged symmetrically so as to be pushed out in the direction, and the control panel C and the control panel C for operating these lifters are arranged. Control panel O is disposed.

  Further, the other end 111b of the chain 111 of the front and rear lifters 100 supports the end of the automobile body mounting member 130 in a rotatable manner, and the front and rear of the automobile body are supported on the surface of the automobile body mounting member 130. A locking member 131 for locking is provided.

  As shown in FIG. 2, the lifter 100 is housed in the horizontal direction with the chain 111 of the elevating mechanism 110 partially deflected vertically by the chain guide 142 formed on the side plate 141 of the body 140. In FIG. 2, the bending restricting member 112 is attached to the lower surface of the chain 111 for each pitch of the chain 111, and when the chain 111 moves up and down in the vertical direction, the bending restricting members 112 are in contact with each other in the vertical direction so as to be self-supporting.

  A ball screw type linear actuator 113 that pushes and pulls one end 111a of the chain 111 is disposed in parallel with the chain 111. The ball screw type linear actuator 113 includes a screw shaft 114 and a screw shaft 114 that are screwed with a ball nut 115. The screw shaft 114 is supported by a first bearing 144 provided in the machine body 140 and a second bearing 145 provided in the vicinity of the bent portion of the chain 111. A toothed pulley 116 is fixed to the end extending outward, and the ball nut 115 is fixed to a block 117 connected to one end 111 a of the chain 111.

  The link mechanism 120 includes a first link member 121 and a second link member 122. One end of the first link member 121 is pivotally supported by the other end 111b of the chain 111, and the other end is It is arranged on a link guide 143 provided on the side plate 141 of the airframe 140 so as to slide in the horizontal direction. One end of the second link member 122 is pivotally supported at the center of the first link 121 and the other end is It is pivotally supported by the airframe 140 near the bent part of the chain, and the link mechanism 120 is also raised and lowered in conjunction with the raising and lowering of the chain 111.

  FIG. 3 shows a state in which one machine body side plate 141 and one link mechanism 120 are removed from the lifter 100 of the present embodiment, and the chain 111 is a pair of roller chains having a roller with a flange. One end 111 a of these chains 111 is connected to a block 117 to which a ball nut 115 is fixed, and the left and right ends are attached to the left and right chains 111 so that the bending restricting member 112 connects the left and right chains 111. ing. Further, between the left and right chains 111, a screw shaft 114 screwed with a ball nut 115 is disposed in parallel with the chain 111, and a block 117 to which the ball nut 115 is fixed by rotation of the screw shaft 114 is a bottom portion of the fuselage. It advances and retreats along the guide plate 144 provided in FIG. Thus, when the pair of chains 111 is used, the screw shaft 114 can be disposed between the chains 111, so that the machine height can be further reduced.

  A block 123 provided with a link pin 124 that pivotally supports one end of the first link member 121 is attached to the other end 111b of the chain 111. An attachment member 132 to which the member 130 is attached is fixed, and the attachment member 132 is provided with side plates 133 having an arcuate outer peripheral surface provided with an attachment hole 134 at the center. An automobile body mounting member 130 is rotatably attached by connecting an attachment hole (not shown) provided in the portion and an attachment hole 134 of the attachment member 132 with a connection pin 135.

  A pair of link mechanisms 120 are provided on the left and right, and one end of the pair of first link members 121 is pivotally supported by a first link pin 124 protruding from the left and right of a block 123 provided on the other end 111b of the chain. The other end is connected by a second link pin 125 and is slidably disposed on a link guide 143 provided on the left and right side walls 141. In addition, one end portions of the pair of second link members 122 are pivotally supported by third link pins 126 projecting from the left and right sides of the airframe 140, and the other end portions are fourth portions at the center portion of the first link member 122. The link pin 127 is pivotally supported.

  Further, as shown in FIG. 4, a plurality of lifters 100 that support the front and rear of the automobile body B are disposed in a pair in the left and right directions of the front and rear in order to support the left and right of the automobile body B. The drive mechanism 150 that drives the lifter 100 is arranged, and the drive mechanism 150 is coaxial with the output shaft 153 of the transmission 152 and the transmission 152 that decelerates the rotation of the motor 151 and the motor 151 that can rotate forward and reverse. It is composed of two fixed toothed pulleys 154 having the same shape, and a toothed belt 155 is wound around the toothed pulleys 154 provided on the toothed pulleys 154 and the left and right lifters 100 to synchronize the left and right lifters 100. And then try to go up and down. A transmission mechanism using gears may be used instead of the transmission mechanism using toothed pulleys and toothed belts.

  Therefore, when the motor 151 is started by the operation panel O, the rotation of the motor 151 is decelerated by the transmission 152 and transmitted to the two toothed pulleys 154 fixed to the output shaft 153, and each of them is transmitted via the toothed belt 155. The toothed pulley 116 fixed to the screw shaft 114 is rotated synchronously. The screw shaft 114 is rotated by the rotation of the toothed pulley 116, and the block 117 is advanced by the ball nut 115 screwed to the screw shaft 114 to push out the chain 111, and is guided by the chain guide 142 to rise in the vertical direction. Let At that time, since one end of the first link member 121 of the link mechanism 120 is pivotally supported by the other end 111b of the chain 111, the link mechanism 120 rises together with the chain 111, and the left and right sides of the rising chain 111 The movement can be regulated to prevent the chain 111 from rattling and the bending member from being displaced, and a stable lifting operation can be performed.

  In this embodiment, the lifter 100 is provided with a pair of chains 111 and link mechanisms 120 on the left and right. However, one or more chains 111 may be provided, and the link mechanism 120 may be a set. In view of the stability of the chain 111 when ascending and descending, it is preferable to provide a pair of link mechanisms 120 on the left and right. Further, the bending restricting member 112 is provided on the lower surface in a horizontal state of the chain 111, but may be provided on the upper surface or both upper and lower surfaces.

  In the present invention, since the lifters 100 arranged at the front and rear positions of the automobile body B can be moved up and down individually, the automobile body B that has advanced through the automobile assembly line and reached the assembly zone is shown in FIG. When the front lifter 100 of B is raised, the vehicle body B is tilted through the vehicle body mounting member 130 with the rear lifter 100 as a fulcrum and the front side of the vehicle body B is opened, and the operator It is possible to access the inside of the vehicle body in an easy posture.

  As described above, the present invention can raise and lower the automobile body safely and stably, and does not require a pit for accommodating the raising and lowering device in the assembly line, so that the layout of the assembly line can be easily changed. This has a remarkable effect that the work can be facilitated by tilting in the front-rear direction.

Front sectional drawing of the motor vehicle body raising / lowering apparatus of a present Example. Front sectional drawing of the lifter of a present Example. The perspective view of the lifter of a present Example. The perspective view of a pair of lifter of a present Example. Explanatory drawing of a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Car body raising / lowering apparatus 100 ... Lifter 110 ... Elevating mechanism 111 ... Chain 111a ... One end part of a chain 111b ... Other end part of a chain 112 ... Bending control member 113 ··· Ball screw type linear actuator 114 ··· Screw shaft 115 ··· Ball nut 116 · · · Pulley with teeth 120 · · · Link mechanism 121 ··· First link member 122 ··· Second link member 123 ・ ・ ・ Block 124 ・ ・ ・ First link pin 125 ・ ・ ・ Second link pin 126 ・ ・ ・ Third link pin 127 ・ ・ ・ Fourth link pin 130 ・ ・ ・ Auto body mounting member 131 ・ ・ ・ Locking member 132 ・ ・ ・ Mounting member 133 ・ ・ ・ Side plate 134 ・ ・ ・ Mounting hole 135 ・ ・ ・ Connecting pin 140 ・ ・ ・ Airframe 141 .... Side plate 142 ... Chain guide 143 ... Link guide 150 ... Drive mechanism 151 ... Motor 152 ... Transmission 153 ... Output shaft 154 ... Toothed pulley 155 ... Tooth With belt O ・ ・ ・ Operation panel C ・ ・ ・ Control panel B ・ ・ ・ Auto body

Claims (3)

In an automobile body lifting device that lifts and lowers an automobile body that has been transferred to an assembly zone on an automobile assembly line with a plurality of lifters installed below,
The lifter lifts and lowers in a state where one end of the chain is pushed and pulled in a horizontal direction by a ball screw type linear actuator and the other end of the chain is deflected in the vertical direction to be self-supported, and the other end of the chain A vehicle body lifting device characterized by comprising a link mechanism that supports the part and guides it in the vertical direction.   2. The lifter includes a ball screw type linear actuator that operates individually, and is disposed at a front-rear position of an automobile body so as to be tilted up and down in the front-rear direction. The automobile body lifting device as described.   2. Each of the chains constituting a part of the lifter disposed at the front and rear of the automobile body is arranged symmetrically so as to be pushed out in the front-rear direction of the automobile body. Item 3. A vehicle body lifting apparatus according to Item 2.

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