JP2006137526A - Automobile body elevating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact automobile body elevating device having a low floor and capable of stably elevating and lowering an automobile body at horizontal attitude or forward or backward inclined attitude. <P>SOLUTION: This automobile body elevating device is provided with a pair of front and rear lifters 110, 110 installed in a bottom part of an automobile body loading base 120 and an elevating and lowering and driving control means for elevating, lowering, and driving the pair of lifters 110, 110 independently from each other. The automobile body loading base 120 is elevated and lowered at horizontal attitude or forward or backward inclined attitude. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an automobile body lifting apparatus used in an automobile assembly line, and more particularly to an automobile body lifting apparatus that can raise and lower an automobile body in a horizontal posture or a front-back tilt posture.

  2. Description of the Related Art Conventionally, as a lifting device used in an automobile assembly line, a means for restricting bending is provided on one side, the bending portion can be bent only in one direction, and in the vertical state, it is self-supporting by means for restricting the bending. And a base having a sprocket that is rotated by a motor and vertically moves up and down the roller chain. The roller chain is moved vertically by the roller chain. There is a table in which the table is moved up and down at an arbitrary stroke using a support member (see Patent Document 1).

Further, as an elevating device using a chain as an elevating mechanism, a pair of sprockets that rotate in both forward and reverse directions in synchronization with each other at opposite positions with a gap between meshing teeth, and both lower portions of the pair of sprockets A pair of meshing chains that are bent vertically upward through the gap from the outside and mesh with each other and move integrally above the sprockets, and a load support member commonly attached to the upper ends of the pair of meshing chains And a plate-like chain guide comprising a storage guide portion in which a roller guide slit for guiding and supporting the rollers of the meshing chain is formed on the outer peripheral side of the meshing chain meshing with the pair of sprockets. (See Patent Document 2).
JP 2002-284491 A Japanese Patent No. 3370928

  However, when the lifting device using the former roller chain is used in an assembly line of an automobile body, a plurality of roller chains supporting the table are driven in synchronization to lift the table in the horizontal direction. Therefore, the vehicle body is lifted and lowered only horizontally during work, and the vehicle body cannot be switched between the horizontal posture and the inclined posture according to the work situation, especially in the case of work inside the vehicle body. Since the person must work under the automobile body, there is a problem that the work is burdened.

  When the lifting device using the latter meshing chain is used in an assembly line for an automobile body, the upper ends of the pair of meshing chains are attached to the center of the bottom of the load support base, and the load support base is lifted and lowered only in the horizontal direction. Therefore, similarly to the above-described lifting device using the roller chain, there is a problem that the work is burdened because the vehicle body cannot be switched between the horizontal posture and the inclined posture according to the work situation.

  Therefore, the technical problem to be solved by the present invention, that is, the object of the present invention, is a low floor and compact which can stably lift and lower the automobile body in a horizontal posture or a front and rear inclined posture so as to facilitate work. It is to provide an automobile body lifting device.

  First, an automobile body lifting apparatus according to claim 1 includes a pair of front and rear lifters installed at the bottom of an automobile body mounting table, and a lifting drive control means for driving the pair of lifters to move up and down independently, The above-described problem is solved by raising and lowering the automobile body mounting table in a horizontal posture or a front and rear inclined posture.

  According to a second aspect of the present invention, there is provided an automobile body lifting apparatus according to the first aspect, wherein the lifter is driven by a pair of sprockets provided at the bottom of the automobile body mounting table and rotating in opposite directions. The above-mentioned problem is solved by providing an elevating drive mechanism that elevates and lowers the automobile body mounting table in a state where the pair of meshing chains that are deflected from the horizontal direction to the vertical direction are meshed with each other and are integrally self-supporting. It is.

  Furthermore, the vehicle body lifting apparatus according to claim 3 is the vehicle body lifting apparatus according to claim 1 or 2, wherein lifters are provided on both sides of the bottom portion of the vehicle body mounting table, so By providing a link support mechanism that avoids shaking, the above-described problems are solved.

The automobile body lifting / lowering device of the present invention can provide the following specific effects by including the above-described configuration.
That is, the automobile body lifting apparatus according to claim 1 includes a pair of front and rear lifters installed on the bottom of the automobile body mounting table, and a lift drive control means for driving the pair of lifters to move up and down independently, By raising and lowering the vehicle body mounting table in a horizontal posture or a front and back tilt posture, the vehicle body mounting table can be lifted and lowered in a horizontal posture or a front and rear tilt posture to make it easy to work. When lifted in a posture, the operator can enter the vehicle body in a comfortable posture from the front side or the rear side of the lifted vehicle body, so that workability can be greatly improved.

  According to a second aspect of the present invention, there is provided an automobile body lifting apparatus according to the first aspect, wherein the lifter is driven by a pair of sprockets provided at the bottom of the automobile body mounting table and rotating in opposite directions. And a lifting drive mechanism for lifting and lowering the automobile body mounting table in a state where the pair of meshing chains that are deflected from the horizontal direction to the vertical direction are meshed with each other and are self-supporting. In addition to the effect of the car body lifting device, the meshing chain is used as the lifting drive mechanism, so it is compact, and in the lowered state, most of the meshing chain is stored in the horizontal direction, so the lifter's height is lowered. In addition, the car body mounting table is low in the lowered state, that is, it has a low floor and becomes compact. Since it can be placed on a carriage arranged in the car assembly line and there is no need to provide a pit for housing the car body lifting device in the car assembly line, the layout of the car assembly line can be set freely, and the layout after setting It is easy to change and it is easy to mount the car body.

  Furthermore, in the vehicle body lifting apparatus according to claim 3, the lifter includes a link support mechanism that is provided on both sides of the bottom portion of the vehicle body mounting table and avoids rolling of the vehicle body mounting table. In addition to the effect of the automobile body lifting apparatus according to claim 1 or 2, since the rolling of the automobile body mounting table during lifting can be avoided, a stable lifting operation can be performed.

  An embodiment of the present invention will be described with reference to FIGS. 1 is a side view of an automobile body lifting apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of a lifter as seen from the direction of line XX in FIG. 1, and FIG. FIG. 4 is a side view of the elevating drive mechanism viewed from the YY line direction, FIG. 4 is a side view of the link support mechanism viewed from the ZZ line direction of FIG. 2, and FIG. 5 is the present embodiment in the automobile assembly line. FIG.

  First, as shown in FIGS. 1 and 2, a vehicle body lifting apparatus 100 according to an embodiment of the present invention includes a pair of front and rear lifters 110 and 110 installed at the bottom of a vehicle body mounting table 120, and the pair of lifters. The vehicle body mounting table 120 is moved up and down in a horizontal posture or a front / rear tilt posture.

  The lifter 110 is provided at a lower central portion of the automobile body mounting table 120 and is driven by a pair of sprockets 111b and 111b that rotate in opposite directions to each other to be deflected from the horizontal direction to the vertical direction. 111a are engaged with each other and lifted up and down the vehicle body mounting table 120 in a state where the vehicle body mounting table 120 is self-supporting. And a link support mechanism 112 for avoiding this.

  That is, as shown in FIGS. 2 to 4, the pair of lifters 110 and 110 includes a lift drive mechanism 111 disposed at the center of the lifter base 113 and links disposed on the left and right sides of the lifter base 113. A support mechanism 112, the upper end of the lift drive mechanism 111 of one lifter 110 is connected to the center of one end of the bottom of the automobile body mounting table 120, and the upper end of the link support mechanism 112 is connected to the left and right sides of the bottom. The upper end of the lift drive mechanism 111 of the other lifter 110 is connected to the center of the other end of the bottom of the automobile body mounting table 120, and the upper end of the link support mechanism 112 is connected to both sides of the bottom. It is designed to move up and down in a horizontal posture or a tilted posture.

  The elevating drive mechanism 111 includes a pair of meshing chains 111a and 111a, which are called chuck chains that have rollers R arranged in two rows and have chuck-shaped meshing teeth, and a pair of driving chains 111a and 111a, respectively. The sprockets 111b and 111b and a pair of plate-like chain guides 111c and 111c provided on the outer peripheral side of the pair of sprockets 111b and 111b for guiding and storing the pair of meshing chains 111a and 111a in the horizontal direction. Yes.

  The pair of meshing chains 111 a and 111 a, the pair of sprockets 111 b and 111 b, and the pair of plate-shaped chain guides 111 c and 111 c are symmetric with respect to the longitudinal direction of the lifter base 113. It is arranged along the central axis of the direction to raise and lower the automobile body.

  In addition, the pair of sprockets 111b and 111b are arranged in two rows coaxially so as to correspond to the two rows of rollers R. Similarly, the pair of chain guides 111c and 111c are also arranged in two rows in the left-right direction, respectively. Has been.

  The pair of sprockets 111b and 111b are opposed to each other with a gap, and are synchronously rotated in opposite directions by a motor M capable of forward and reverse rotation via a reduction gear R and interlocking gears G and G. .

  As shown in FIG. 3, the pair of chain guides 111c and 111c have guide slits 111d and 111d for horizontally guiding the meshing chains 111a and 111a below the sprocket, and the rollers R of the meshing chains 111a and 111a. The guides are supported so as to be drawn out and retracted so as to be sandwiched between them, and are extended outward and folded upward in the vicinity of the outer end portions of the chain guides 111c and 111c so as to be formed to the inner end portions.

  In the lowered state shown in FIG. 3, most of the meshing chains 111a and 111a are accommodated in the chain guides 111c and 111c, and the upper end is connected to the bottom of the automobile body mounting table 120.

  Note that the meshing chains 111a and 111a shown in FIG. 2 show a state where they are horizontally supported by the guide slits 111d and 111d below the sprockets 111b and 111b. The guides 111c and 111c represent a horizontal cross section.

2 and 4, the link support mechanism 112 includes a pair of first link members 112a and 112a and a pair of second link members 112b disposed on the left and right sides of the lifter base 113. 112b and a reinforcing member 112c that couples the pair of first link members 112a and 112a. The first link members 112a and 112a can be pivoted at both ends to the bottom side of the vehicle body mounting table. At the other end, a roller 112d is provided so as to move horizontally on the guide member 112e. One end of each of the second link members 112b and 112b is the first link 112a and 112a. The other end portion is rotatably connected to the lifter base 113 to support the automobile body mounting table 120.
The reinforcing member 112c connects the pair of first link members 112a and 112a and keeps the link members 112a, 112a, 112b and 112b arranged on the left and right in parallel.

  Therefore, when the motor M is started in the lowered state shown in FIG. 3 by the lifting drive control means (not shown), the pair of sprockets 111b and 111b rotate in opposite directions and are stored in the chain guides 111c and 111c. The meshing chains 111a and 111a are pulled out and deflected vertically upward through the gap between the sprockets 111b and 111b from below the pair of sprockets 111b and 111b, and the meshing chains 111a and 111a are meshed with each other above the sprocket. In the state of being self-supporting integrally, it is sequentially extended upward.

  When the lift control unit (not shown) drives and controls the pair of front and rear lifters 110 and 110 so as to synchronize, as shown by the solid line in FIG. 1, the vehicle body mounting table 120 rises in a horizontal posture. . Further, by independently controlling the driving speed, driving time, etc. of the pair of lifters 110, 110, the lifter 110 is lifted so as to have a forward / backward tilt posture as shown by a two-dot chain line in FIG.

  Therefore, the vehicle body mounting table 120 can be lifted up and down in a horizontal posture or a front-and-back tilt posture to make it easy to work. In particular, when the vehicle body mounting table 120 is lifted and lowered in a front-and-back tilt posture, the front or rear side of the lifted car body Since the worker can enter the car body with an easy posture, workability can be greatly improved.

  When the sprockets 111b and 111b are reversed by the lift drive control means (not shown) after the work is completed, the meshing chains 111a and 111a are retracted into the chain guides 111c and 111c, and the automobile body mounting table 120 is lowered. Return to the descent position.

  In that case, since one end part of the pair of first link members 112a and 112a of the link support mechanism 112 is rotatably connected to the automobile body mounting table 120, the link support mechanism 112 is perpendicular to the automobile body mounting table. The vehicle body mounting table 120 that is moving up and down is prevented from rolling, and a stable lifting operation is performed.

Next, referring to FIG. 5, a usage mode of the automobile body lifting / lowering device of the present embodiment in the automobile assembly line will be described.
First, in the automobile assembly line, a plurality of carriages 130 moving along a pair of rails L, L arranged side by side along the conveyance line are arranged. The automobile body lifting apparatus 100 of this embodiment is provided for each carriage 130. The vehicle body (not shown) is placed on the vehicle body mounting table 120 and transported along a predetermined transport line.

  When the predetermined work position is reached, the pair of front and rear lifters 110, 110 are moved up and down while moving the carriage 130, and assembly work is performed. At this time, since the lifters 110 and 110 are independently driven up and down, the vehicle body mounting table 120 is moved up and down in a horizontal posture or a front and rear inclined posture by synchronously or separately driving. Further, the carriage 130 has a flip-up work floor 131 joined to the side surface in the traveling direction by a hinge, so that it is necessary for the operator to perform assembly work while walking. Therefore, workability can be remarkably improved.

  Further, the vehicle body lifting device 100 of this embodiment has a low machine height when lowered and can be mounted on the carriage 130. Therefore, a pit for housing the vehicle body lifting device 100 is mounted on the vehicle assembly. There is no need to provide it on the line, and it is easy to mount the automobile body.

  Furthermore, since the vehicle body lifting apparatus 100 of this embodiment is supported by a pair of front and rear lifters 110, 110, the vehicle body mounting table 120 having a different length can be obtained by changing the distance between the lifters 110, 110. Even if the automobile body is long, it is easy to cope with it.

  As described above, the automobile body lifting apparatus 100 according to the present embodiment drives the pair of front and rear lifters 110 and 110 installed on the bottom of the automobile body mounting table 120 and the pair of lifters 110 and 110 independently to move up and down. The vehicle body mounting table 120 is moved up and down in a horizontal posture or a front-and-back inclination posture, and thus the vehicle body mounting table 120 is lifted and lowered in a horizontal posture or a front-and-back inclination posture. In particular, when raising and lowering in an inclined position, the operator can easily enter the car body from the front or rear side of the raised car body, greatly improving workability. The effect is enormous.

The side view of the motor vehicle body raising / lowering apparatus which is one Example of this invention. The top view of the lifter seen from the XX line direction of FIG. The side view which shows the raising / lowering drive mechanism seen from the YY line direction of FIG. The side view which shows the link support mechanism seen from the ZZ line direction of FIG. The use aspect figure of the motor vehicle body raising / lowering apparatus of a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Car body raising / lowering device 110 ... Lifter 111 ... Elevating drive mechanism 111a ... Meshing chain 111b ... Sprocket 111c ... Chain guide 111d ... Guide slit 112 ... Link support Mechanism 112a ... First link member 112b ... Second link member 112c ... Reinforcing member 112d ... Roller 112e ... Guide member 113 ... Lifter base 120 ... Car body mounted Stand 130 ... Cart 131 ... Flip-up work floor M ... Motor T ... Transmission G ... Interlocking gear R ... Roller L ... Rail

Claims (3)

  A pair of front and rear lifters installed at the bottom of the vehicle body mounting table and a lifting drive control means for driving the pair of lifters to move up and down independently, and the vehicle body mounting table is moved up and down in a horizontal posture or a front and rear inclined posture. An automobile body lifting device characterized by the above.   The lifter meshes with each other a pair of meshing chains that are driven by a pair of sprockets that are provided at the bottom of the vehicle body mounting table and rotate in opposite directions, and that are deflected in the vertical direction from the horizontal direction. 2. The automobile body lifting device according to claim 1, further comprising a lifting drive mechanism that lifts and lowers the vehicle body mounting table in a state where the vehicle body is placed.   3. The automobile body according to claim 1, wherein the lifter includes a link support mechanism that is provided on both sides of the bottom portion of the automobile body mounting table to avoid rolling of the automobile body mounting table. 4. lift device.

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