JP2012001360A - Meshing chain type lifting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a meshing chain type lifting device for actualizing accurate lifting movement of carried objects to positions to be reached.SOLUTION: The meshing chain type lifting device 100 includes a pair of bent arm mechanisms 160 which are installed in both side regions of a pair of meshing chains 110 equally distant from the pair of meshing chains 110 in the state of being fixed and connected to a lifting table 150 and a chain penetrating plate 130, respectively, and one of which has a total length H1 equal to the other and smaller than a height H0 from the upper face of the chain penetrating plate 130 to the virtual upper limit position of the lifting table 150.

Description

  The present invention is used for manufacturing equipment in various manufacturing fields, transport equipment in the transportation field, nursing care equipment in the medical and welfare field, stage equipment in the art field, etc. in a state where the posture of the object to be lifted is maintained parallel to the installation surface. The present invention relates to a lifting device that moves up and down in a vertical direction, and particularly to a meshing chain type lifting device that employs a meshing chain as a driving medium for lifting and lowering operation.

Conventionally, as a lifting device, there is a pair of meshing chains that are meshed with each other and driven integrally, that is, a lifting device that moves a transported object such as a heavy object up and down using a so-called chuck chain (see, for example, Patent Document 1). .)
In such a meshing chain type lifting device, a pair of meshing chains mesh with each other and become rigid in a state where minute clearances are formed between the inner tooth plates that mesh with each other and between the outer tooth plates that mesh with each other.

JP 2009-286505 A (refer to claims, FIG. 1)

However, as shown in FIGS. 10 and 11, in the conventional meshing chain type lifting device 300, when a biased load is applied to the internal tooth plates 311 and the external tooth plates 312 that mesh with each other, the pair of meshing chains 310 are arranged. Since the pair of meshing chains 310 are bent to one side in the branching direction when they are meshed with each other, the lifting table 350 is reached when the pair of meshing chains 310 are meshed with each other and stiffened. The position of the uppermost position is shifted from the position where the lifting table 350 should be reached in a direction parallel to the plate surface, that is, in the branching direction of the pair of meshing chains, so that the object to be conveyed can be accurately moved to the position where it should be moved up and down. There was a problem that it became difficult.
Further, since the meshing chain 310 bends in such a manner that the plate interval slightly increases in the width direction of the chain, the same problem as the above-described bending to one side in the branching direction occurs.
Further, in the conventional meshing chain type lifting device, as shown in Patent Document 1, lifting assist guide means that is folded in parallel to a virtual plane including the rigid direction and the branching direction of the pair of meshing chains is provided on both sides of the virtual plane. Therefore, it is difficult to avoid the bending state of the pair of meshing chains along the direction parallel to the plate surface of the inner tooth plate or the outer tooth plate because of the structure of the lifting assist guide means. It was.
In addition, in the conventional meshing chain type lifting device, in order to provide the lifting assist guide means with a structure for correcting the curved state of the pair of meshing chains, the number of parts is increased, which causes an increase in parts cost and parts. There is a problem in that the manufacturing cost for assembling the structure increases.
Moreover, since the weight of the lifting assist guide means increases as the number of parts increases, there is a problem that an increase in load applied to the pair of meshing chains cannot be avoided.

  Therefore, the technical problem to be solved by the present invention, that is, the object of the present invention is to avoid an increase in manufacturing cost, parts cost and weight and to accurately move up and down to a position where the object to be conveyed should reach. It is providing the meshing chain type raising / lowering apparatus which implement | achieves.

  First, the invention according to claim 1 includes an internal tooth plate having a hook shape and an internal tooth plate that overlaps the internal tooth plate while being shifted by a half pitch in the longitudinal direction of the chain. Are connected to the outer tooth plate in the chain width direction and connected to the outer teeth plate in the chain width direction. A pair of meshing chains that can be separated from each other and branched, a chain storage plate that forms a chain storage groove for storing the pair of meshing chains in a state of being disengaged, and a state in which the pair of meshing chains are made rigid A chain penetrating plate that has a chain through hole that is penetrated by and fixed to the chain storage plate in a horizontal state; A meshing chain comprising: a drive sprocket for driving a pair of meshing chains; and a lifting table that is attached to the upper ends of the pair of meshing chains and lifts and lowers the object to be conveyed in accordance with the lifting operation of the pair of meshing chains. A pair of self-supporting correction means for generating a self-supporting correction force of the pair of meshing chains, wherein upper and lower ends are fixedly connected to the lifting table and the chain through plate in both side areas of the pair of meshing chains, respectively. In this state, the above-described problems are solved by providing the self-supporting correction force to the pair of meshing chains.

The invention according to claim 2 is the meshing chain type lifting device according to claim 1, wherein the pair of self-supporting correction means is shorter than the height from the upper surface of the chain penetrating plate to the virtual upper limit position of the lifting table. In addition, the above-described problems are further solved by having the same overall length and being disposed at equal distances from the pair of meshing chains in both side regions of the pair of meshing chains.
The “virtual upper limit position” as used in the present invention means that the lifting table is reached when the pair of meshing chains are rigidized in the vertical direction without being bent without the pair of self-supporting correction means being installed. The highest reachable position.

  The invention according to claim 3 is the mesh chain type lifting apparatus according to claim 1 or 2, wherein the pair of self-supporting straightening means each have a plurality of arms connected to each other through joints. A pair of bending arm mechanisms that bend in the chain width direction, and the total length is the maximum length of the bending arm mechanism in a state where the bending arm mechanism is extended in the vertical direction, thereby further solving the above-described problem It is a thing.

  According to a fourth aspect of the present invention, there is provided the meshing chain type lifting device according to the third aspect, wherein the connecting rigid member for connecting the pair of bending arm mechanisms to each other is in a state of being passed to the pair of bending arm mechanisms. Due to the fixed connection, the above-described problems are further solved.

  The invention according to claim 5 is the meshing chain type lifting device according to claim 1 or 2, wherein the self-supporting correcting means is a linear or chain having the rigid direction of the pair of meshing chains as a longitudinal direction. The above-described problems are further solved by using a cylindrical or rod-like elastic member.

  The meshing chain type lifting device of the present invention includes an inner tooth plate having a hook shape and an inner tooth plate that overlaps the inner tooth plate while being shifted by a half pitch in the longitudinal direction of the chain. It has bushes that are connected and fixed in the width direction and connecting pins that are connected and fixed in the width direction of the chain to the external tooth plate, and they are stiffened together and meshed with each other in a state of being opposed to each other on the installation surface. A pair of meshing chains that can be separated and branched, a chain storage plate that forms a chain storage groove for storing the pair of meshing chains in a disengaged state, and a chain that passes through the pair of meshing chains in a rigid state A chain through plate that has a through hole and is fixed horizontally to the chain storage plate, and a pair of teeth It is equipped with a drive sprocket that drives the chain and a lifting table that is attached to the upper ends of the pair of meshing chains and lifts the object to be conveyed in accordance with the lifting operation of the pair of meshing chains. Not only can the placed object to be moved up and down horizontally along the vertical direction, but also the following special effects can be achieved.

  That is, in the meshing chain type lifting device according to the first aspect of the present invention, the pair of self-supporting correcting means for generating the self-supporting correction force of the pair of meshing chains has the upper and lower ends at both sides of the pair of meshing chains. By providing the self-supporting correction force to the pair of meshing chains in a state where they are fixedly connected to the through plates, a pair of rigidized meshing chains are driven in the vertical direction. Since the self-supporting correction force acts on the lifting table from both sides of the meshing chain, the load applied to the pair of meshing chains is increased by avoiding an increase in manufacturing cost, the number of parts and weight compared to the case where the lifting assist guide means is used. Avoiding the bending of the pair of stiffened meshing chains while avoiding the bending, and accurately covering the position where the object to be conveyed should reach. It is possible to realize that the vertically moving the Okubutsu.

  In addition to the effect of the meshing chain lifting device according to the first aspect, the meshing chain lifting device according to the second aspect of the present invention includes a pair of self-supporting correcting means that are provided on the lifting table from the upper surface of the chain penetrating plate. It is shorter than the height to the virtual upper limit position and has the same overall length, and is located at the same distance from the pair of meshing chains in both sides of the pair of meshing chains. Since the correction force acts, the bending of the pair of meshing chains can be further avoided.

  In addition to the effect of the meshing chain lifting device according to claim 1 or 2, the pair of self-supporting straightening means is connected to each other via joints. A pair of bending arm mechanisms each having a plurality of arms bent in the chain width direction, and the total length is the maximum length of the bending arm mechanism in a state where the bending arm mechanism is extended in the vertical direction, As the pair of meshing chains are stiffened, the pair of bending arm mechanisms are extended in the vertical direction, and the self-supporting correction force acts on the lifting table from the pair of bending arm mechanisms in the extended state. By correcting the self-standing posture of the pair of meshing chains with a simple mechanism configuration without applying driving force, the curved state of the pair of meshing chains is avoided and the object to be conveyed is made to reach. It is possible to realize a moving more accurately lift the to position.

  Furthermore, in addition to the effect of the meshing chain lifting device according to claim 3, the meshing chain lifting device according to claim 4 includes a pair of rigid members for connecting the pair of bending arm mechanisms to each other. By being fixedly connected to the bending arm mechanism in a handed state, it is reliably avoided that the pair of bending arm mechanisms tilt in the branching direction of the pair of meshing chains. It is possible to reliably move the conveyed object up and down.

  Further, in the mesh chain type lifting device according to the fifth aspect, in addition to the effect exerted by the mesh chain type lifting device according to the first or second aspect, the self-supporting correcting means extends the rigid direction of the pair of mesh chains. By being a linear, chain, or rod-shaped elastic member in the direction, the elastic force acts as a self-supporting correction force from the pair of elastic members to the lifting table according to the driving of the pair of rigid meshing chains. To correct the self-supporting posture of the pair of meshing chains with a simple configuration, avoid the curved state of the pair of meshing chains, and realize moving the transported object more precisely to the position where the transported object should reach. Can do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The perspective view which removed the chain penetration plate and the bending arm mechanism from FIG. The perspective view which shows the vicinity of a drive sprocket. The perspective view which shows the decomposition | disassembly assembly state of a meshing chain. The front view of the meshing chain type raising / lowering device in which a bending arm mechanism is in an extended state. The side view of the meshing chain type lifting device in which the bending arm mechanism is in the extended state. The rear view of the meshing chain type lifting device in which the bending arm mechanism is in the extended state. The front view of the meshing chain type raising / lowering apparatus which is 2nd Example of this invention. The side view of the meshing chain type raising / lowering apparatus in which a rod-shaped elastic member is in an extended state. The front view of the conventional meshing chain type lifting device. The figure which shows the curve state of the meshing chain in the conventional meshing chain type raising / lowering apparatus.

  According to the present invention, an internal tooth plate having a hook shape is overlapped with the internal tooth plate while being shifted by a half pitch in the chain longitudinal direction, and the external tooth plate having the hook shape and the internal tooth plate are connected and fixed in the chain width direction. It is provided with a bush and a connecting pin that is connected and fixed to the external tooth plate in the chain width direction, and it is rigidized integrally in a state where it is meshed with each other on the installation surface and opposed to each other, and it can be separated from each other to be freely branched. A pair of meshing chains, a chain storage plate formed with a chain storage groove for storing the pair of meshing chains in a disengaged state, and a chain through hole for allowing the pair of meshing chains to pass through in a rigid state A chain penetrating plate fixed in a horizontal state to the chain storage plate and a drive for driving a pair of meshing chains A pair of self-supporting units that includes a sprocket and a lifting table that is attached to the upper ends of the pair of meshing chains and lifts the object to be conveyed according to the lifting operation of the pair of meshing chains, and generates a self-supporting correction force for the pair of meshing chains Straightening means is provided to cause the self-supporting straightening force to act on the pair of meshing chains in a state where the upper and lower ends of the paired meshing chains are fixedly connected to the lifting table and the chain penetrating plate, respectively. Compared to the case where guide means is used, the manufacturing cost, the number of parts, and the weight are avoided to avoid an increase in load applied to the pair of meshing chains, and the curved state of the pair of rigid meshing chains is avoided to be conveyed. If it is possible to accurately move the object up and down to the position where it should reach, concrete implementation Aspect, it does not matter any be any one.

That is, the pair of self-supporting correcting means is provided on a base disposed on the chain penetrating plate and indirectly fixedly connected to the chain penetrating plate, or via a support member provided on the lower surface of the lifting table. Indirectly fixedly connected to the lifting table may generate a self-supporting correction force according to the stiffening of the pair of meshing chains. In this case, even if the total length of the pair of self-supporting correction means is different from each other Good.
In addition, the pair of self-supporting correction means may be paired with the pair of meshing chains as long as they have a configuration in which the magnitude of the self-supporting correction force is adjusted to correct the curved state of the pair of meshing chains. The distance to the self-supporting correction means may be different from each other.
Further, in the meshing chain type lifting device of the present invention, the number of inner link units arranged in parallel in the chain width direction may be either a single row or a double row such as two rows or three rows, When a plurality of inner link units are arranged in the chain width direction, the outer tooth plate and the inner tooth plate that constitute one of the pair of meshing chains, and the outer tooth plate that constitutes the other meshing chain that faces the other. Multiple hooks, so-called chucks, are engaged in multiple rows in the chain width direction with the inner tooth plate, so that buckling that tends to occur in the chain width direction of the meshing chain is reliably suppressed. A curved state in the chain width direction can be avoided and a curved state in the branch direction can be surely avoided.

  In addition, regarding the specific shapes of the internal tooth plate and the external tooth plate used in the meshing chain lifting device of the present invention, the same type of plates facing each other are meshed together to be integrated and removed from each other. Any shape may be used as long as it is branched.

In addition, the pair of self-supporting correcting means is arranged in both side regions along either the branching direction of the pair of meshing chains, the chain width direction, or the direction crossing the branching direction of the pair of meshing chains and the chain width direction. It is sufficient that the pair of self-supporting correction means are arranged in both side areas along any one of these directions, so that the object to be conveyed can be reached by avoiding the curved state of the pair of meshing chains. It is possible to accurately move up and down.
Further, in the meshing chain type lifting device of the present invention, the self-supporting correction means is provided in at least one of the both sides in the chain width direction of the pair of meshing chains so that the curved state along the chain width direction of the pair of meshing chains is more It may be further avoided.
Moreover, in the meshing chain type lifting device of the present invention, the elastic member only needs to have a structure in which a self-supporting correction force is applied according to the rigidity of the pair of meshing chains. For example, a linear elastic member such as a wire Alternatively, a chain-like elastic member such as a chain chain, a link-like elastic member such as a roller chain, or a rod-like elastic member such as a steel material may be used.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an interlocking chain type lifting apparatus that is an embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 1 is a perspective view of the meshing chain type lifting apparatus according to the first embodiment of the present invention, and FIG. 2 is a perspective view of FIG. 1 excluding the chain penetrating plate and the bending arm mechanism. 3 is a perspective view showing the vicinity of the drive sprocket, FIG. 4 is a perspective view showing a disassembled and assembled state of the mesh chain, and FIG. 5 is a front view of the mesh chain type lifting device in which the bending arm mechanism is in the extended state. FIG. 6 is a side view of the meshing chain lifting device with the bending arm mechanism in the extended state, and FIG. 7 is a rear view of the meshing chain lifting device with the bending arm mechanism in the extended state. FIG. 8 is a front view of a meshing chain lifting apparatus according to a second embodiment of the present invention, and FIG. 9 is a side view of the meshing chain lifting apparatus in which the rod-like elastic member is in an extended state.
[First embodiment]

  The meshing chain type lifting device 100 according to the first embodiment of the present invention is used for manufacturing equipment in various manufacturing fields, transport equipment in the transport field, care equipment in the medical welfare field, stage equipment in the art field, and the like. As shown in FIG. 1, a lifting table 150 on which a workpiece (not shown) to be lifted is mounted is moved up and down while being kept level with respect to the installation surface G. A bending arm mechanism 160 is used as a self-supporting correction means. Adopted.

As shown in FIGS. 1 to 4, the meshing chain type lifting device 100 of the first embodiment is shifted by a half pitch in the longitudinal direction of the chain with respect to the inner tooth plate 111 having a hook shape and the inner tooth plate 111. An external tooth plate 112 that overlaps and has a hook shape, a bush 113 that connects and fixes the internal tooth plates 111 in the chain width direction, and a connection pin 114 that is connected and fixed to the external tooth plate 112 in the chain width direction and are installed. A pair of meshing chains 110 that are rigidly integrated with each other in a state of being opposed to each other on the surface G and that are separated from each other so that they can be branched, and a chain that accommodates the pair of meshing chains 110 in a state of being unengaged The chain storage plate 120 formed with the storage groove 121 and the pair of meshing chains 110 are rigidized. A chain through plate 130 that has a chain through hole 131 that is passed through in a state and is fixed to the chain storage plate 120 in a horizontal state, a drive sprocket 140 that drives the pair of meshing chains 110, and a pair of meshing chains 110. And a lifting table 150 which is attached to the upper end of the chain and lifts and lowers the object to be conveyed in accordance with the lifting and lowering operation of the pair of meshing chains 110. Therefore, the object to be conveyed placed on the lifting table 150 is vertically aligned. It is designed to move up and down horizontally.
The drive sprocket 140 is driven in accordance with the rotational operation of the drive shaft 141 that is rotationally driven by a drive motor (not shown), so that the above-described lift table 150 is kept horizontal and is transported on the lift table 150. Objects are moved up and down.

Next, a description will be given of a pair of bending arm mechanisms 160 that are most characteristic of the meshing chain lifting device 100 of the first embodiment.
That is, as shown in FIGS. 1, 5 to 7, the pair of bending arm mechanisms 160 that generate the self-supporting correction force F of the pair of meshing chains 110 are paired with each other along the branch direction of the pair of meshing chains 110. The upper and lower ends of the chain 110 are installed at equal distances from the pair of meshing chains 110 with their upper and lower ends fixedly connected to the lifting table 150 and the chain penetrating plate 130, respectively, and the lifting table 150 from the upper surface of the chain penetrating plate 130. A pair of meshes along the branching direction as the pair of stiffened meshing chains 110 are driven in the vertical direction by being shorter than the height H0 to the virtual upper limit position and having the same overall length H1. Since the self-supporting straightening force F acts on the lifting table 150 from both sides of the chain 110, the lifting assist guide Compared to the case of using the door means, the manufacturing cost, the number of parts, and the weight are avoided, and the curved state of the pair of stiffened meshing chains 110 is avoided, so that the transported object can be accurately reached at the position where the transported object should reach. Can be moved up and down.

  The pair of bending arm mechanisms 160 each have a plurality of arms 162 connected to each other via joints 161 and bend in the chain width direction, and the total length H1 of the bending arm mechanism 160 is perpendicular to the bending arm mechanism 160. By being the maximum length of the bending arm mechanism 160 in the state extended in the direction, the pair of bending arm mechanisms 160 are extended in the vertical direction in response to the stiffening of the pair of meshing chains 110, and the pair of extension arm mechanisms 160 are in the extended state. Since the self-supporting correction force F acts on the lifting table 150 from the bending arm mechanism 160, the meshing chain type lifting device 100 of this embodiment does not apply a driving force to the pair of bending arm mechanisms 160 and has a simple mechanism configuration. The self-standing posture of the meshing chain 110 should be corrected to avoid the curved state of the pair of meshing chains 110 and to reach the object to be conveyed. It is adapted to realize that to more accurately vertical movement to the position.

  Furthermore, in the meshing chain lifting device 100 of the present invention, the connecting rigid member 170 that connects the pair of bending arm mechanisms 160 to each other is fixedly connected to the pair of bending arm mechanisms 160 in a handed state. The bending arm mechanism 160 is reliably prevented from tilting in the branching direction of the pair of meshing chains 110, so that the meshing chain type lifting device 100 of the present invention can more reliably cover the position where the object to be conveyed should reach. The conveyed product is moved up and down.

In the meshing chain type lifting apparatus 100 of the first embodiment obtained in this way, the pair of bending arm mechanisms 160 that generate the self-supporting correction force F of the pair of meshing chains 110 are arranged in the branching direction of the pair of meshing chains 110. The upper end and the lower end of the pair of meshing chains 110 are fixedly connected to the lifting table 150 and the chain through plate 130 in both side regions, and are installed at an equal distance from the pair of meshing chains 110 and By having the total length H1 shorter than the height H0 from the upper surface to the virtual upper limit position of the lifting table 150, a pair of meshing is avoided by avoiding an increase in manufacturing cost and the number of parts compared to the case where the lifting assist guide means is used. A pair of meshing chains that avoids an increase in load applied to the chain 110 and are rigid. Etc. can be avoided occurrence of 10 bending state realizing be moved accurately lift the carried object in a position to bring the carried object, the effect is significant.
[Second embodiment]

Next, based on FIG. 8 and FIG. 9, the meshing chain type lifting apparatus 200 which is 2nd Example of this invention is demonstrated.
In addition, about the part which is common with the meshing chain type raising / lowering apparatus 100 of 1st Example, detailed description is abbreviate | omitted by replacing the code | symbol of the 100th generation with the code | symbol of the 200th series.

As shown in FIGS. 8 and 9, in the meshing chain type lifting device 200 of the second embodiment, a rod-like elastic member 260 is used as a self-supporting correction means instead of the aforementioned bending arm mechanism 160 in the rigid direction of the pair of meshing chains 210. Are provided in the longitudinal direction.
Then, the pair of rod-like elastic members 260 that generate the self-supporting correction force F of the pair of meshing chains 210 has the upper and lower tables 250 at the upper and lower ends in both sides of the pair of meshing chains 210 along the branching direction of the pair of meshing chains 210. In addition, they are installed equidistantly from the pair of meshing chains 210 in a state where they are fixedly connected to the chain penetrating plate 230, and are shorter than the height H0 from the upper surface of the chain penetrating plate 230 to the virtual upper limit position of the lifting table 250 and mutually. Has a total length H2 equal to.

  Accordingly, since the self-supporting correction force F acts as an elastic force from the pair of rod-like elastic members 260 to the lifting table 250 in accordance with the drive in the rigid direction from the branch state of the pair of meshing chains 210, the meshing chain type of this embodiment The lifting device 200 avoids the curved state of the pair of meshing chains 210 by correcting the self-standing posture of the pair of meshing chains 210 with a simpler configuration than the meshing chain type lifting device 100 according to the first embodiment described above. It is realized to accurately move the transported object up and down to a position where the transported object should reach.

  The meshing chain lifting device 200 according to the second embodiment of the present invention thus obtained has a simple configuration in addition to the effects that the meshing chain lifting device 100 according to the first embodiment can achieve. It is possible to correct the self-standing posture of the pair of meshing chains 210 to avoid the curved state of the pair of meshing chains 210 and to move the transported object up and down more accurately to the position where the transported object should reach. The effect is enormous.

100, 200, 300 ... meshing chain type lifting device 110, 210, 310 ... meshing chain 111, 311 ... internal tooth plate 112, 312 ... external tooth plate 113 ... bushing 114 ... Connecting pin 120 ... Chain storage plate 121 ... Chain storage groove 130 ... Chain through plate 131 ... Chain through hole 140 ... Drive sprocket 141 ... Drive shaft 150, 250, 350 ... Lifting table 160 ... Bending arm mechanism 161 ... Joint 162 ... Arm 170 ... Rigid member for connection 260 ... Rod-like elastic member G ... Installation surface H0 ... Virtual upper limit from chain penetrating plate Height to position H1 Total length of the bending arm mechanism in the extended state H2 Total length of the rod-shaped elastic member in a stretched state

Claims (5)

An inner tooth plate having a hook shape, a bush that overlaps with the inner tooth plate by a half pitch in the longitudinal direction of the chain, and that connects and fixes the outer tooth plate having the hook shape and the inner tooth plates in the chain width direction; A pair of connecting pins that are connected and fixed to the external tooth plate in the chain width direction, are rigidly integrated with each other on the installation surface and are opposed to each other, and are separated from each other so as to be freely branched. A chain storage plate formed with a chain storage groove for storing the meshing chain, the pair of meshing chains in a state of being disengaged, and a chain through-hole through which the pair of meshing chains are made to be rigid A chain penetrating plate fixed in a horizontal state to the chain storage plate and the pair of meshing chains are driven. A drive sprocket, a mesh chain type lifting device and a lifting table for lifting the carried object in response to vertical movement of the pair of attached to the chain the upper end of the engagement chain of the pair engagement chains,
A pair of self-supporting correction means for generating a self-supporting correction force of the pair of meshing chains is configured such that the upper and lower ends of the pair of meshing chains are fixedly connected to the lifting table and the chain through plate in both side areas, respectively. A meshing chain type lifting device characterized in that the self-supporting correction force is applied to the meshing chain.   The pair of self-supporting correction means has a total length that is shorter than a height from the upper surface of the chain penetrating plate to a virtual upper limit position of the lifting table and is equal to each other, and the pair of meshing chains at both sides of the pair of meshing chains. The interlocking chain type lifting device according to claim 1, wherein the lifting device is disposed at an equal distance from the center. The pair of self-supporting correction means is a pair of bending arm mechanisms each having a plurality of arms connected to each other via joints and bending in the chain width direction,
The meshing chain lifting device according to claim 1 or 2, wherein the total length is a maximum length of the bending arm mechanism in a state where the bending arm mechanism is extended in a vertical direction.   The interlocking chain type lifting device according to claim 3, wherein a connecting rigid member for connecting the pair of bending arm mechanisms to each other is fixedly connected to the pair of bending arm mechanisms in a passing state. The meshing chain type according to claim 1 or 2, wherein the self-supporting correcting means is a linear, chain-shaped, or bar-shaped elastic member having a longitudinal direction as a rigid direction of the pair of meshing chains. lift device.

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