JP5424849B2 - Engagement chain type lifting device - Google Patents

Description

  The present invention is an elevating device for elevating and lowering an elevating table parallel to an installation surface for use in manufacturing equipment in various manufacturing fields, transport equipment in the transport field, nursing care equipment in the medical and welfare field, stage equipment in the art field, and the like. In particular, the present invention relates to a meshing chain type lifting device that employs a meshing chain as a drive medium for the lifting operation.

Conventionally, as a lifting device, there is a meshing chain type lifting device that meshes with each other and moves up and down integrally, that is, a meshing chain type lifting device that lifts and lowers an object to be lifted such as a heavy load using a so-called chuck chain.
As an example, there is a meshing chain type lifting device that uses a link mechanism such as scissors as a lifting assist guide and suppresses the swinging of the lifting table that is caused by an unbalanced load placed on the lifting table (Patent Document) 1).

JP 2009-1378 A (refer to paragraph [0033], FIG. 1 in particular)

  However, in the conventional meshing chain type lifting device, even if the lifting table is in the raised position, the link mechanism serving as a lifting assist guide for suppressing the swinging of the lifting table interferes with the operator. There is a problem that carrying-in / out work and maintenance work of the object to be lifted are difficult, and when the lifting table is lowered, interference between the link mechanism and the meshing chain, driving motor, etc. must be avoided. For this reason, the lowering position of the elevating table cannot be set low, and so-called low flooring is hindered.

  Further, in the conventional meshing chain type lifting device, the number of parts related to the lifting mechanism is increased by the provision of a link mechanism serving as a lifting assist guide for suppressing the swinging of the lifting table as described above, thereby simplifying and reducing the weight. There was a problem that could not be realized.

  Therefore, a technical problem to be solved by the present invention, that is, an object of the present invention is to achieve stable lifting work of an object to be lifted by suppressing swinging of the lifting table and to lower the floor of the lifting table that has been lowered. Furthermore, it is to provide a meshing chain type lifting device that realizes simplification and weight reduction of the lifting mechanism and reduction in the number of parts.

  First, the invention according to claim 1 stiffens integrally with the first rotating shaft arranged in a horizontal plane along the installation surface, and meshed with each other on the installation surface so as to face each other. A first meshing chain unit that is disengaged and can be branched; a first drive sprocket that is pivotally supported by the first rotation shaft to drive the first meshing chain unit; and a second rotation shaft that is disposed in the horizontal plane. And a second meshing chain unit that stiffens integrally in a state of being meshed with each other on the installation surface and facing each other, and that is separable and can be branched, and is pivotally supported by the second rotary shaft and A second drive sprocket for driving the two-meshing chain unit; and the first driving sprocket attached to the upper ends of the first and second-meshing chain units. A transported object support section that ascends and descends according to the ascending / descending operation of the meshing chain unit and the second meshing chain unit, and a drive source that supplies a driving force to at least one of the first drive sprocket and the second drive sprocket. The first and second rotary shafts are arranged at different positions in the horizontal plane, and a pair of meshing chains constituting the first meshing chain unit are provided. The vertical first unit deflection surface including the chain meshing direction and the chain branching direction is along the vertical second unit deflection surface including the chain meshing direction and the chain branching direction of the pair of meshing chains constituting the second meshing chain unit. And the first unit deflection surface is opposite to the second unit deflection surface. The first rotating shaft and the second rotating shaft are arranged at different positions along the first unit deflection surface and the second unit deflection surface, and the first meshing chain unit. The stiffened portions of the pair of meshing chains and the stiffened portions of the pair of meshing chains of the second meshing chain unit are disposed between the first rotating shaft and the second rotating shaft, and The drive sprocket includes a rigid portion of the pair of meshing chains of the first meshing chain unit and a rigidity of the pair of meshing chains of the second meshing chain unit in the opposing direction of the first rotating shaft and the second rotating shaft. The second drive sprocket is driven from the outside of the first meshing chain unit with the gap between the first and second meshing parts as a reference. Between the stiffened portions of the pair of meshing chains of the first meshing chain unit and the rigidized portions of the pair of meshing chains of the second meshing chain unit in the opposing direction of the rotating shaft and the second rotating shaft. Driving from the outside of the second meshing chain unit as a reference, the first meshing chain unit receives a driving force only from the outside of the first meshing chain unit, and the second meshing chain unit The above-described problem can be solved by receiving the driving force only from the outside of the meshing chain unit.

  The “unit deflection surface” of the meshing chain type lifting device of the present invention refers to a chain meshing direction in which a pair of meshing chains constituting the meshing chain unit mesh with each other, and a chain branching direction in which the pair of chains branch from each other. The surface which consists of the area | region which a pair of meshing chain of the state meshed | engaged mutually among the perpendicular | vertical surfaces including both occupies.

  In addition to the configuration of the meshing chain lifting device according to claim 1, the invention according to claim 2 transmits the power of the drive source between the first rotating shaft and the second rotating shaft. Since the spur gears are respectively attached to the first rotating shaft and the second rotating shaft, the above-described problems are further solved.

  The meshing chain type lifting device of the present invention is rigidly integrated with the first rotating shaft disposed in a horizontal plane along the installation surface, and meshed with each other on the installation surface and opposed to each other, and is disengaged from each other. A first meshing chain unit that can be branched, a first drive sprocket that is pivotally supported by a first rotation shaft to drive the first meshing chain unit, a second rotation shaft that is disposed in a horizontal plane, and an installation surface A second meshing chain unit that is stiffened integrally in a state of being meshed with each other and opposed to each other, and that is separable and can be branched, and a second meshing chain unit that is pivotally supported by a second rotating shaft. The second drive sprocket, the first meshing chain unit and the second meshing chain unit are attached to the upper ends of the first meshing chain unit and the second meshing chain unit. Conveying by providing a transported object support section that moves up and down in accordance with the lifting operation with the combined chain unit, and a drive source that supplies driving force to at least one of the first drive sprocket and the second drive sprocket. In addition to being able to move up and down at a constant speed while keeping the object support portion horizontal, the following specific effects can be achieved.

  That is, according to the meshing chain type lifting device according to the first aspect, when the object to be lifted is mounted in a state of being unevenly distributed on the transported object support part or when the transported object support part is raised near the highest position Even so, since the rigidity of each of the first meshing chain unit and the second meshing chain unit is exhibited at two locations, that is, the first unit deflection surface and the second unit deflection surface, the transported object support on which the object to be lifted is placed is supported. It is possible to reliably suppress the swinging of the part and to raise and lower the object to be lifted stably.

  In addition, since there is no need to add an auxiliary guide for raising / lowering to suppress the swing of the transported article support portion as in the conventional case, the number of parts of the raising / lowering mechanism is reduced, and simplification and weight reduction are realized and maintenance maintenance is performed. The operability of work and the like is greatly improved, and the lowest position of the conveyed product support portion when the conveyed product support portion is lowered can be set low. Flooring can be realized.

  Furthermore, since the rigidity of each of the first meshing chain unit and the second meshing chain unit is exhibited at two locations, the first unit deflection surface and the second unit deflection surface, the unit meshes along the direction in which these unit deflection surfaces are laid sideways. When a load is applied to one of the chain units, the other meshing chain unit can exhibit rigidity without being directly affected, and can maintain a stable ascending / descending operation against the load in the lateral direction. .

  Moreover, according to the meshing chain type lifting device according to the second aspect, in addition to the effect exhibited by the meshing chain type lifting device according to the first aspect, a separate drive source is provided for each of the first rotation shaft and the second rotation shaft. In order to drive the first meshing chain unit and the second meshing chain unit by sharing the drive source between the first rotational shaft and the second rotational shaft without providing them, each of the first rotational shaft and the second rotational shaft is provided. Compared with the case where a drive source is provided, the number of drive sources installed is reduced, and the lifting mechanism can be further simplified.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view of a meshing chain lifting device that is a first embodiment of the present invention. The perspective view which shows the decomposition | disassembly assembly state of a meshing chain. The perspective view which shows the vicinity of a drive sprocket. The top view of the state which removed the raising / lowering table from FIG. The top view of the meshing chain type raising / lowering apparatus which is 2nd Example of this invention.

  The meshing chain type lifting device of the present invention is rigidly integrated with the first rotating shaft disposed in a horizontal plane along the installation surface, and meshed with each other on the installation surface and opposed to each other, and is disengaged from each other. A first meshing chain unit that can be branched, a first drive sprocket that is pivotally supported by the first rotation shaft to drive the first meshing chain unit, a second rotation shaft that is disposed in a horizontal plane, and an installation surface And a second meshing chain unit which is stiffened integrally in a state of being opposed to each other and disengaged from each other and can be branched, and a second meshing chain unit which is supported by a second rotating shaft and which drives the second meshing chain unit. Attached to the upper ends of the two-drive sprocket, the first meshing chain unit and the second meshing chain unit, the first meshing chain unit and the second meshing A conveyed product support section that moves up and down in accordance with a lifting operation with the chain unit, and a drive source that supplies a driving force to at least one of the first drive sprocket and the second drive sprocket, The second rotating shaft is disposed at a different position in the horizontal plane, and a vertical first unit deflection surface including the chain meshing direction and the chain branching direction of the pair of meshing chains constituting the first meshing chain unit is the second meshing. The pair of meshing chains constituting the chain unit are arranged at different positions along a vertical second unit deflection surface including the chain meshing direction and the chain branching direction, and the first unit deflection surface is located with respect to the second unit deflection surface. The first rotary shaft and the second rotary shaft are spaced apart in parallel and the first unit shaft is offset. The stiffened portions of the pair of meshing chains of the first meshing chain unit and the stiffened portions of the pair of meshing chains of the second meshing chain unit are arranged at different positions along the surface and the second unit deflection surface. The first drive sprocket is disposed between the first rotation shaft and the second rotation shaft, and the first drive sprocket is disposed between the pair of meshing chains of the first meshing chain unit in the opposing direction of the first rotation shaft and the second rotation shaft. Driven from the outside of the first meshing chain unit with reference to the space between the stiffened portion and the stiffened portions of the pair of meshing chains of the second meshing chain unit, the second drive sprocket is connected to the first rotating shaft and the first rotating shaft. A pair of meshing chains and a pair of second meshing chain units of the first meshing chain unit in a direction opposite to the two rotation shafts The second meshing chain unit is driven from the outside of the second meshing chain unit with respect to the stiffened portion of the meshing chain, and the first meshing chain unit receives a driving force only from the outer side of the first meshing chain unit, As long as the meshing chain unit is configured to receive a driving force only from the outside of the second meshing chain unit, any specific embodiment may be used.

  The meshing chain used in the meshing chain type lifting device of the present invention is called a chuck chain, and is meshed with each other immediately after being driven by the drive sprocket to deflect from the horizontal direction to the vertical direction, and rises in a self-supporting state. As long as they are disengaged and branched from each other when driving from the vertical direction to the horizontal direction by the drive sprocket, any specific chain form may be used. It may be any one having a roller, one single row in the chain width direction, two or more rows in the chain width direction, or a combination thereof. When using two or more double rows in the chain width direction, an external tooth plate that constitutes one of the pair of meshing chains The inner and outer tooth plates are multiplexed in a hook-like manner, so-called chuck-like and firmly in multiple rows in the chain width direction with respect to the outer tooth plate and the inner tooth plate constituting the other meshing chain opposite to the inner tooth plate. Since meshing is achieved, buckling that tends to occur in the chain width direction of the meshing chain can be reliably suppressed, and excellent chain durability can be realized.

  Further, in the meshing chain type lifting device of the present invention, one of the pair of meshing chains constituting the meshing chain unit may be driven with a drive sprocket to drive the other meshing chain together with one meshing chain, You may drive a pair of meshing chain with the drive sprocket provided corresponding to each of both of a pair of meshing chain.

  When one meshing chain is driven by a drive sprocket and the other meshing chain is driven by meshing with one meshing chain without being driven by a drive sprocket, each of both meshing chains is driven by a pair of drive sprockets. Compared to the case, the number of drive sprockets is reduced, which makes it possible to further simplify and lighten the lifting mechanism and reduce the number of components.

Further, in the meshing chain type lifting device of the present invention, the first meshing chain unit and the second mesh are driven by a driving sprocket that is further supported on one of the first rotating shaft and the second rotating shaft separately from the first driving sprocket and the second sprocket. A meshing chain unit different from the meshing chain unit may be driven.
When the conveyed product support portion is lifted and lowered by three or more meshing chain units, the rigidity against the uneven load applied to these meshing chain units is further increased, and as a result, the rigidity of the meshing chain type lifting device can be further improved. it can.
In addition, since one drive sprocket can be shared with a plurality of meshing chain units, the number of drive sprockets and drive sources can be reduced, and the configuration of the meshing chain type lifting device can be simplified.
Further, the transported object support unit is not limited to the lifting table as long as the transported object is loaded on the upper part of the table or the like, and may be other objects.
Further, the drive source may be anything as long as it can supply the drive force by means such as a drive motor.

An interlocking chain type lifting apparatus which is an embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 1 is an overall perspective view of the meshing chain type lifting device according to the first embodiment of the present invention, FIG. 2 is a perspective view showing an exploded assembly state of the meshing chain, and FIG. FIG. 4 is a perspective view showing the vicinity of the sprocket, FIG. 4 is a perspective view of the state where the lifting table is removed from FIG. 1, and FIG. 5 is a plan view of the mesh chain type lifting device according to the second embodiment of the present invention. It is.

  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 110 on which a work (not shown) to be lifted is mounted is moved up and down while being kept level with respect to the installation surface.

  The meshing chain type lifting device 100 of the first embodiment is composed of a first rotating shaft 110A disposed in a horizontal plane along the installation surface G of the work area and a pair of meshing chains. The first meshing chain unit 120A, which is stiffened integrally in a state where it is meshed with each other and is opposed to each other, is disengaged from each other and can be branched, and is pivotally supported by the first rotating shaft 110A. The first drive sprocket 130A to be driven, the second rotating shaft 110B disposed in a horizontal plane, and a pair of meshing chains are engaged with each other on the installation surface G and are rigidized integrally with each other. The second meshing chain unit 120B that is disengaged from each other and can be branched is supported by the second rotating shaft 110B and the second meshing chain unit 120B. And a second drive sprocket 130B for driving the focus chain unit 120B are respectively provided.

The first meshing chain unit 120A and the second meshing chain unit 120B described above each have the same unit structure configured by a pair of meshing chains.
Therefore, by describing the specific unit structure of the first meshing chain unit 120A, the specific unit structure of the second meshing chain unit 120B is omitted.
As shown in FIG. 2, the pair of meshing chains constituting the first meshing chain unit 120 </ b> A includes a hook-shaped inner tooth plate 121 and a hook that overlaps the inner tooth plate 121 while being shifted by a half pitch in the chain longitudinal direction. Shaped outer tooth plate 122, a bush 123 that connects and fixes the inner tooth plates 121 in the chain width direction, and a connection pin 124 that passes through the bush 123 and connects and fixes the outer tooth plates 122 in the chain width direction. Are knitted in two rows in the chain width direction.

  Therefore, in the first meshing chain unit 120A described above, the internal tooth plate 121 and the external tooth plate 122 of one meshing chain constituting the pair of meshing chains are connected to the internal tooth plate 121 of the other meshing chain facing this. The outer teeth plate 122 is engaged with multiple hooks, so-called chucks, in multiple rows in the chain width direction, so that it is engaged in a self-standing state. Even when a load is applied, buckling, which tends to occur in the chain width direction of the overloaded meshing chain, is reliably suppressed.

As shown in FIG. 3, a first chain guide plate 140A is provided in a crotch region where a pair of meshing chains constituting the first meshing chain unit 120A are opposed to each other.
As a result, immediately after the deflection drive from the horizontal direction to the vertical direction along the first chain guide plate 140A, the two mesh with each other and rise together in a self-standing state, and the first drive sprocket 130A deflects from the vertical direction to the horizontal direction. When driving, they are disengaged from each other and branched.

Further, as shown in FIG. 1, a first chain storage box 150A for retractably storing a first meshing chain unit 120A composed of a pair of meshing chains is disposed on the installation surface G of the work area described above. Yes.
The first chain storage box 150A stores the pair of meshing chains constituting the first meshing chain unit 120A while winding them.

  As shown in FIG. 1, the upper ends of the first meshing chain unit 120A and the second meshing chain unit 120B described above correspond to the lifting and lowering operations of the first meshing chain unit 120A and the second meshing chain unit 120B. A lifting table 160 that moves up and down is attached.

Further, the first drive sprocket 130A pivotally supported on the first rotation shaft 110A described above is driven by a drive motor 170.
Thus, the drive motor 170 moves up and down at a constant speed while maintaining the above-described lifting table 160 in a horizontal state.

Next, the arrangement form of the first rotating shaft 110A, the second rotating shaft 110B, the first meshing chain unit 120A, and the second meshing chain unit 120B, which is the most characteristic of the meshing chain lifting device 100 of the first embodiment, This will be described below.
That is, the first rotating shaft 110A and the second rotating shaft 110B described above are arranged at different positions in the horizontal plane, and the chain meshing direction and the chain branching direction of the pair of meshing chains constituting the first meshing chain unit 120A. The vertical first unit deflection surface S1 including the second meshing unit 120B is disposed at different positions along the vertical second unit deflection surface S2 including the chain meshing direction and the chain branching direction of the pair of meshing chains constituting the second meshing chain unit 120B. Has been.
As a result, even when the object to be lifted is mounted on the lifting table 150 in an unevenly distributed state or when the lifting table 160 is raised near the highest position, the first meshing chain unit 120A and the second meshing chain The rigidity of each of the units 120B is exhibited at two locations of the first unit deflection surface S1 and the second unit deflection surface S2, and the lowest position of the lifting table 160 when the lifting table 160 is lowered is set low.

Further, the first unit deflection surface S1 is spaced in parallel to the second unit deflection surface S2, and the first rotation shaft 110A and the second rotation shaft 110B are the first unit deflection surface S1 and the second unit deflection surface. They are arranged at different positions along S2.
As a result, the rigidity of each of the first meshing chain unit 120A and the second meshing chain unit 120B is exerted at two locations of the first unit deflection surface S1 and the second unit deflection surface S2. Even when a load is applied to one of the first meshing chain unit 120A and the second meshing chain unit 120B along the direction in which the second unit deflection surface S2 is laid down, the other is directly affected. It exhibits rigidity and maintains a stable ascending / descending operation against a load in the lateral direction.

Spur gears 180A and 180B that transmit the power of the drive motor 170 described above between the first rotary shaft 110A and the second rotary shaft 110B are respectively attached to the first rotary shaft 110A and the second rotary shaft 110B. Has been.
As a result, the first rotating shaft 110A and the second rotating shaft 110B share the driving motor 170 without providing a separate driving motor for each of the first rotating shaft 110A and the second rotating shaft 110B. The chain unit 120A and the second meshing chain unit 120B are driven, the number of drive motors is reduced, and the lifting mechanism is further simplified.

Therefore, the meshing chain lifting device 100 of the first embodiment obtained in this way operates as follows.
That is, in the meshing chain type lifting device 100 of this embodiment, when the lifting table 160 is lifted, the driving force of the driving motor 170 is applied to the driving sprocket 130A via the first rotating shaft 110A and the first rotating shaft 110A described above. The rotational force is transmitted to the drive sprocket 130B via the spur gear 180A, the spur gear 180B, and the second rotation shaft 110B, and the first meshing chain unit 120A and the second meshing chain unit 120B are transmitted by the drive sprocket 130A and the drive sprocket 130B. A pair of meshing chains that respectively drive and constitute the first meshing chain unit 120A and the second meshing chain unit 120B mesh with each other while being deflected from the chain branching direction to the chain meshing direction, so that they are integrated and stand up independently. It is adapted to branch off bite each other while deflecting from the chain engagement direction the chain branching direction while.

Accordingly, the pair of meshing chains constituting the first meshing chain unit 120A and the second meshing chain unit 120B are driven to be deflected from the horizontal direction to the vertical direction, so that the pair of meshing chains mesh with each other. The elevating table 160 is raised by raising the chain in a self-supporting state.
On the other hand, the elevating table 160 is lowered by reversing the drive motor 170 so as to be disengaged and branched while being deflected from the chain meshing direction to the chain branching direction.

  In the meshing chain type lifting device 100 of the first embodiment obtained in this way, the first rotating shaft 110A and the second rotating shaft 110B are arranged at different positions in the horizontal plane and the first meshing chain unit 120A Since the first unit deflection surface S1 is arranged at different positions along the second unit deflection surface S2 of the second meshing chain unit 120B, the rigidity of each of the first meshing chain unit 120A and the second meshing chain unit 120B. Is exerted at two locations, the first unit deflection surface S1 and the second unit deflection surface S2, so that the swinging of the lifting table 160 on which the object to be lifted is placed is reliably suppressed and the object to be lifted is lifted and lowered stably. Can be made.

  In addition, since there is no need to install an auxiliary guide for raising / lowering to suppress the raising / lowering table as in the prior art, the number of parts of the raising / lowering mechanism is reduced to achieve simplification and weight reduction and operability such as maintenance work. In addition, the floor of the lift table 160 in which the lowest position of the lift table 160 is set low can be realized.

  The first unit deflection surface S1 is spaced apart in parallel to the second unit deflection surface S2, and the first rotation shaft 110A and the second rotation shaft 110B are the first unit deflection surface S1 and the second unit deflection surface. By being shifted to different positions along S2, when a load is applied to one of the first meshing chain unit 120A and the second meshing chain unit 120B, the other is directly affected. The effect is enormous, for example, by exhibiting rigidity and maintaining a stable ascending / descending operation with respect to the load in the lateral direction.

Next, as shown in FIG. 5, the meshing chain type lifting device 200 according to the second embodiment of the present invention is arranged on the rotating shaft 110 </ b> A in addition to the device configuration of the meshing chain type lifting device 100 according to the first embodiment. The driven sprocket 230C and the driven sprocket 230C are engaged with each other while being deflected from the chain branching direction to the chain meshing direction and lifted together in a self-supporting state, and the drive sprocket 230C is deflected from the chain meshing direction to the chain branching direction. However, it includes a meshing chain unit 220 </ b> C that includes a pair of meshing chains that disengage from each other and branch off.
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 No. 100 to the code | symbol of the 200th series.

The lifting table 260 is also attached to the upper end of the third meshing chain unit 220C.
As a result, the lifting table 260 moves up and down according to the lifting and lowering of the first meshing chain unit 220A, the second meshing chain unit 220B, and the third meshing chain unit 220C.

  In the meshing chain type lifting device 200 of the second embodiment of the present invention thus obtained, in addition to the effects that the meshing chain type lifting device 100 of the first embodiment described above can exhibit, the first meshing chain type Since the unit 220A, the second meshing chain unit 220B, and the third meshing chain unit 220C are simultaneously driven by a single drive motor 270, the simplified device configuration despite the addition of the third meshing chain unit 220C Can be maintained.

  Since the first meshing chain unit 220A, the second meshing chain unit 220B, and the third meshing chain unit 220C support the lifting table 260 at three locations, the first meshing chain unit 220A and the second meshing chain unit 220B are supported. And the effect is enormous, for example, the rigidity against the eccentric load applied to the third meshing chain unit 220C can be increased.

DESCRIPTION OF SYMBOLS 100,200 ... Meshing chain type lifting device 110A, 210A ... 1st rotation shaft 110B, 210B ... 2nd rotation shaft 210C ... 3rd rotation shaft 120A, 220A ... 1st meshing chain unit 120B, 220B ... 2nd meshing chain unit 220C ... 3rd meshing chain unit 121 ... Hook-like inner tooth plate 122 ... Hook-like outer tooth plate 123 ... Bush 124 ... Connection Pins 130A, 230A ... 1st drive sprocket 130B, 230B ... 2nd drive sprocket 230C ... 3rd drive sprocket 140A ... 1st chain guide plate 150A ... 1st chain storage box 160, 260 ... Elevating table 170, 270 ... Drive motor 1 0A, 180B, 280A, 280B ··· spur gear G · · · installation surface S1 · · · first unit deflection surface S2 · · · second unit deflecting surface

Claims (2)

A first rotating shaft disposed in a horizontal plane along the installation surface, and a first meshing chain which is rigidized integrally in a state of being meshed with each other and opposed to each other on the installation surface, and is disengaged from each other and can be branched. A unit, a first drive sprocket that is pivotally supported by the first rotating shaft and drives the first meshing chain unit, a second rotating shaft that is disposed in the horizontal plane, and meshes with each other on the installation surface. A second meshing chain unit that is rigidly integrated in a state of being opposed to each other and that is disengaged from each other and can be branched, and a second drive sprocket that is pivotally supported by the second rotating shaft and drives the second meshing chain unit. Attached to the upper ends of the first meshing chain unit and the second meshing chain unit, and the first meshing chain unit and the second meshing unit. Engagement chain type ascending / descending provided with a transported object supporting part that moves up and down in accordance with a lifting operation with the chain unit, and a driving source that supplies driving force to at least one of the first driving sprocket and the second driving sprocket. A device,
The first rotating shaft and the second rotating shaft are arranged at different positions in the horizontal plane;
A vertical first unit deflection surface including a chain meshing direction and a chain branching direction of a pair of meshing chains constituting the first meshing chain unit is a chain meshing direction of a pair of meshing chains constituting the second meshing chain unit. Arranged at different positions along the vertical second unit deflection surface including the chain branching direction,
The first unit deflection surface is spaced apart in parallel to the second unit deflection surface;
The first rotating shaft and the second rotating shaft are arranged at different positions along the first unit deflection surface and the second unit deflection surface,
The stiffened portions of the pair of meshing chains of the first meshing chain unit and the rigidized portions of the pair of meshing chains of the second meshing chain unit are disposed between the first rotating shaft and the second rotating shaft. Established,
The first drive sprocket includes a pair of meshing portions of the pair of meshing chains of the first meshing chain unit and a pair of meshing of the second meshing chain unit in the opposing direction of the first rotating shaft and the second rotating shaft. Drive from the outside of the first meshing chain unit with the chain between the stiffened parts as a reference,
The second drive sprocket includes a pair of meshing portions of the pair of meshing chains of the first meshing chain unit and a pair of meshing of the second meshing chain unit in the opposing direction of the first rotating shaft and the second rotating shaft. Driven from the outside of the second meshing chain unit with reference to the rigid part of the chain,
The first meshing chain unit receives a driving force only from the outside of the first meshing chain unit, and the second meshing chain unit receives a driving force only from the outside of the second meshing chain unit. A meshing chain lifting device characterized by that.   The spur gear which transmits the motive power of the said drive source between the said 1st rotating shaft and the 2nd rotating shaft is each axially attached to the said 1st rotating shaft and the 2nd rotating shaft. The meshing chain lifting device according to claim 1.

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