JP6128085B2 - Lifting device and auxiliary drive unit - Google Patents

Description

  The present invention relates to a lifting device and an auxiliary drive unit.

  A transport device such as a stacker crane is used for transporting articles such as a FOUP (hoop) that accommodates semiconductor wafers in an automatic warehouse, for example. The stacker crane includes, for example, a transfer device that transfers articles to a storage shelf of an automatic warehouse, and includes a lift that moves along a mast in the vertical direction, and a drive device that drives the lift. have. The lifting device includes, for example, a chain spanned along the mast, and a sprocket that is hung on a part of the chain and rotated by a motor, and moves the chain by driving the sprocket to lift the lifting platform. .

  For example, when the operation of the transfer device is stopped due to a failure of a motor or the like, the lifting platform may be stopped by an electromagnetic brake or the like, and the lifting platform may interfere with work. In view of this, a technique has been proposed in which the stopped elevator is moved without using a drive source such as a motor (see, for example, Patent Document 1). In Patent Document 1, a manual handle is provided in an electric motor that moves an elevator, and the stopped elevator is moved by turning the manual handle.

Japanese Patent No. 3835377

  In Patent Document 1, it is possible to retract the lifting platform to a position that does not interfere with work by turning the manual handle. However, depending on the weight and moving distance of the lifting platform, a great deal of labor is required for the operator to retract the lifting platform. Further, in an automatic warehouse or the like, from the viewpoint of effective use of space, a shelf for storing articles is often provided up to a high position in the vertical direction, and the distance for retracting the lifting platform is increased, which is a heavy labor for the operator.

  The present invention has been made in view of the above-described circumstances, and is capable of easily and reliably raising and lowering a stopped elevator and further reducing the labor of an operator required for moving the elevator. And it aims at providing an auxiliary drive unit.

The lifting device of the present invention includes a lifting platform that can be lifted and lowered along a mast extending in a vertical direction from a base frame, a cord-like body that is stretched over the mast and connected to the lifting platform, and a portion of the cord-like body. A main drive unit that raises and lowers the lifting platform by driving the driven rotary body and moving the cable-like body, and an auxiliary drive unit that is provided on the drive rotary body and rotates integrally and is detachable from the base frame A receiving portion that receives the driving force of the auxiliary driving portion via the driving force transmitting portion, and the receiving portion includes an adapter that can be attached to and detached from the driving rotating body, and an adapter side gear that can be attached to and detached from the adapter, comprising a driving force transmitting unit includes an output gear provided on the output shaft of the auxiliary drive unit, and an intermediate gear that meshes with the output gear and the adapter side gear, Ru comprising a.

  The transmitted portion includes an adapter that can be attached to and detached from the driving rotating body, and an adapter-side gear that can be attached to and detached from the adapter, and the driving force transmitting portion includes an output gear provided on the output shaft of the auxiliary drive portion, and an output And an intermediate gear meshing with the gear and the adapter side gear. Further, a connecting plate for positioning the adapter side gear and the intermediate gear may be provided in the transmitted portion, and a connecting member for positioning the output gear and the intermediate gear may be provided in the driving force transmitting portion. Further, the transmitted part may be disposed between a driving wheel that is installed on the base frame and travels on a track on the floor surface, and the driving rotating body.

The auxiliary drive unit according to the present invention includes a lifting platform that can be lifted and lowered along a mast extending in a vertical direction from a base frame, a cord-like body that is stretched over the mast and connected to the lifting platform, and a portion of the cord-like body. An auxiliary drive unit of an elevating device comprising a main drive unit that raises and lowers the elevator platform by driving the driven rotating body and moving the cable-like body, and an auxiliary drive unit that is detachable from the base frame; An adapter that can be attached to and detached from the driving rotary body, and a driving force transmitting section that transmits the driving force of the auxiliary driving section to a transmitted section that is provided on the driving rotating body and rotates integrally. When, and a adapter side gear detachable from the adapter, the driving force transmitting unit includes an output gear provided on the output shaft of the auxiliary drive unit, and an intermediate gear that meshes with the output gear and the adapter side gear, Ru comprising a.

  The driving force transmission unit includes an output gear provided on the output shaft of the auxiliary driving unit, an intermediate gear that meshes with the output gear and can be connected to the transmission unit, and a connecting member that positions the output gear and the intermediate gear. You may have.

  When the lifting platform stops, the lifting device according to the present invention supplies the driving force from the auxiliary driving unit to the driving rotating body via the driving force transmitting unit, and moves the cable-like body easily and easily. It can be moved reliably. Therefore, the operator can move the lifting platform by a simple operation such as installation of the auxiliary driving unit and the driving force transmission unit, and therefore the labor required for the operator can be reduced.

  The transmitted portion includes an adapter that can be attached to and detached from the driving rotating body, and an adapter-side gear that can be attached to and detached from the adapter, and the driving force transmitting portion includes an output gear provided on the output shaft of the auxiliary drive portion, and an output When an intermediate gear that meshes with the gear and the adapter side gear is used, by using the adapter, the driving force transmission unit can be easily attached to the rotating body for driving, and by changing the adapter, for different types of driving A driving force transmission unit can be attached to the rotating body. Further, when the transmitted portion includes a connection plate that positions the adapter side gear and the intermediate gear, and the driving force transmission portion includes a connection member that positions the output gear and the intermediate gear, the connection plate and the connection member The adapter side gear, the intermediate gear, and the output gear can be accurately positioned. Further, when the transmitted part is disposed between the driving wheel that is installed on the base frame and travels on the track on the floor surface, and the driving rotating body, the transmitted part protrudes outside the base frame. And an increase in the size of the transport device can be avoided.

  In addition, since the auxiliary drive unit of the present invention includes the auxiliary drive unit and the driving force transmission unit, the cord-like body of the lifting device can be easily and reliably moved. Moreover, since it is configured in a small size, the storage space such as a warehouse can be reduced, and the operator can easily bring it to the transport device when in use.

  The driving force transmission unit includes an output gear provided on the output shaft of the auxiliary driving unit, an intermediate gear that meshes with the output gear and can be connected to the transmission unit, and a connecting member that positions the output gear and the intermediate gear. When provided, the driving force of the auxiliary drive unit can be reliably transmitted to the transmitted portion of the lifting device.

An example of the raising / lowering apparatus which concerns on this embodiment is shown, (A) is the figure seen from the advancing direction of a conveying apparatus, (B) is a top view. It is a figure which shows an example of the raising / lowering apparatus to which the auxiliary drive unit was attached. It is a figure which shows the state which attached the adapter to the rotary body for a drive. It is a figure which shows the state which attached the connection plate to the adapter. It is a figure which shows the state which attached the adapter side gear to the adapter. It is a figure which shows the state which attached the plate to the base frame. It is a figure which shows the state which attached the auxiliary drive unit to the plate. It is a figure which shows the usage example of the raising / lowering apparatus which concerns on this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to this. Further, in the drawings, in order to describe the embodiment, the scale is appropriately changed and expressed by partially enlarging or emphasizing the description. In the following drawings, directions in the drawings will be described using an XYZ coordinate system. In this XYZ coordinate system, the vertical direction is the Z direction, and the horizontal direction is the X direction and the Y direction. In each of the X direction, the Y direction, and the Z direction, the direction of the arrow in the figure is the + direction, and the direction opposite to the arrow direction is the − direction.

  FIG. 1 conceptually shows an automatic warehouse 2 to which a lifting device 1 according to this embodiment is applied. 1A shows a view from the X direction, and FIG. 1B shows a view from the Z direction. The lifting device 1 is used, for example, to move the article OB in the automatic warehouse 2. The article OB is a container such as a FOUP in which a semiconductor wafer is stored. The article OB may be, for example, a reticle case or another object other than the FOUP, and the mass thereof is not limited.

  The automatic warehouse 2 includes a plurality of storage shelves 3 and a transfer device 4 such as a stacker crane. The transport device 4 includes a traveling carriage 7 that includes driving wheels 5 and a traveling drive unit 6. The drive wheels 5 are installed on a base frame 8 constituting the traveling carriage 7 and are arranged on a T-shaped or I-shaped rail (track) 9 installed on the floor surface F. The base frame 8 includes a pair of rollers 5 a that sandwich an intermediate portion of the rail 9. The traveling carriage 7 travels when the driving wheel 5 is rotationally driven by the traveling driving unit 6, and the driving wheel 5 can move in the X direction without being dropped from the rail 9 by the roller 5 a. Note that the X direction is the direction in which the transport device 4 travels, and may be referred to as the front-rear direction.

  The base frame 8 is provided with a mast 10 extending in the vertical direction. The height of the mast 10 is set to a height at which the transfer device 25 described later can transfer the article OB to the uppermost storage shelf 3. The upper end portion of the mast 10 is provided so that the pair of rollers 11 sandwich the ceiling rail 9a. The roller 11 is rotationally driven in synchronization with the drive wheel 5 by a drive device (not shown), and the upper end portion of the mast 10 is sent in the traveling direction of the traveling carriage 7 by the roller 11. Note that driving of the drive wheels 5 and driving of the rollers 11 are controlled by a control device (not shown).

  The plurality of storage shelves 3 are arranged side by side in the front-rear direction (X direction) and the vertical direction (Z direction) along the rail 9. Each storage shelf 3 is formed so as to be able to place an article OB, and a space capable of storing the article OB is formed on the upper surface side of each storage shelf 3. In addition, each storage shelf 3 is provided with, for example, three pins (not shown) on the upper surface, and the articles OB are positioned by the pins entering grooves provided on the bottom surface of the article OB. In FIG. 1, the storage shelf 3 is disposed only on one side (−Y side) of the rail 9, but the storage shelf 3 may be provided on both sides of the rail 9. The transport device 4 can deliver the article OB to both the −Y side storage shelf 3 and the + Y side storage shelf.

  The lifting device 1 includes a lifting platform 20 that can be moved up and down along the mast 10, a chain (cord-like body) 21 that spans the mast 10 and connects to the lifting platform 20, and a sprocket hung on a part of the chain 21. (Drive rotating body) 22 and a main drive unit 23 that drives the sprocket 22 to move the chain 21.

  The main drive unit 23 includes, for example, an electric motor and a speed reducer, and rotates the sprocket 22. The electric motor is controlled by a controller 34 (see FIG. 2). This control device drives the electric motor to define the amount of rotation of the sprocket 22, and sets the lifting platform 20 to a desired height. The sprocket 22 is disposed on the base frame 8 (lower part of the mast 10), and the chain 21 is engaged with the outer periphery thereof. The sprocket 22 is supported by the base frame 8 via the main drive unit 23. The chain 21 is hung on a roller 24 (sprocket) at the top of the mast 10. The chain 21 is stretched in the shape of an ellipse whose longitudinal direction is the vertical direction. The chain 21 moves (circulates) along an elliptical track as the sprocket 22 rotates. The lifting platform 20 is attached to the chain 21 and is raised or lowered as the chain 21 moves.

  The cord-like body may not be the chain 21, and a wire, a belt, or the like may be used. When a belt is used, it may be a belt having a plurality of irregularities or through holes provided at regular intervals on the belt surface. Further, the driving rotator is selected according to the shape of the cord so that the cord can be moved. For example, when the cord is a wire or a belt, a driving roller or the like may be used. . In addition, when a belt or the like is used as the rope state, a tension applying mechanism for applying a predetermined tension to the belt or the like may be installed.

  The lifting platform 20 is provided with a transfer device 25 that transfers the article OB to and from the storage shelf 3 and a loading / unloading section (not shown) of the article OB in the automatic warehouse 2. The transfer device 25 includes, for example, a swivel arm rotatably provided on the lifting platform 20, a telescopic arm rotatably provided on the swivel arm, and a hand unit provided on the telescopic arm and connectable to the storage shelf 3. And composed of The swivel arm and the telescopic arm are rotated by a driving device (not shown) to move the hand unit forward and backward, and the elevator 20 is moved up and down to transfer the article OB to an arbitrary storage shelf 3 or the like. Note that, for example, three pins are provided on the upper surface of the hand portion, and the article OB is positioned with respect to the hand portion by entering the groove portion on the bottom surface of the article OB. The above-described transfer device 25 is an example, and any configuration that can transfer the article OB to the storage shelf 3 or the like, such as a robot hand, is applicable.

  In the lifting device 1 described above, for example, when the main drive unit 23 fails, the electromagnetic brake or the like acts to restrict the rotation of the sprocket 22, and the lifting platform 20 remains stopped at an arbitrary position. The elevator 20 stopped in this way may interfere with other operations. In the present embodiment, the auxiliary drive unit 30 is attached to the lifting device 1, and the lifting platform 20 is moved using the driving force of the auxiliary drive unit 30. Therefore, the sprocket 22 is provided with a transmitted portion 33 for receiving the driving force of the auxiliary drive unit 30.

  The auxiliary drive unit 30 includes an auxiliary drive unit 31 that can be attached to and detached from the base frame 8, and a drive force transmission unit 32 (see FIG. 1B) that transmits the drive force of the auxiliary drive unit 31 to the transmitted unit 33. Prepare. The auxiliary drive unit 30 is an external unit that is detached from the base frame 8 when the main drive unit 23 is in operation and is attached and used when the main drive unit 23 stops. When the auxiliary drive unit 30 is stored, the auxiliary drive unit 31 may be stored in a state where the driving force transmission unit 32 is attached to the auxiliary driving unit 31, or the auxiliary driving unit 31 and the driving force transmission unit 32 may be separated separately. May be stored in

  The transmitted portion 33 receives the driving force from the auxiliary driving portion 31 via the driving force transmitting portion 32 and rotates integrally with the sprocket 22. Thereby, the chain 21 moves with the rotation of the sprocket 22, and the lifting platform 20 can be moved from the stop position. Thus, in this embodiment, the input system of driving force is increased using the sprocket 22 used when the main drive unit 23 is operated.

  The transmitted portion 33 may be manufactured integrally with the sprocket 22 or may be manufactured separately from the sprocket 22 and integrated with a fixing tool such as a bolt. When the transmitted portion 33 is detachable from the sprocket 22, an attachment portion for attaching the transmitted portion 33 is formed on the sprocket 22. As this attachment part, it is a screw hole corresponding to a volt | bolt, for example. When the transmitted part 33 is detachable from the sprocket 22, the transmitted part 33 may be stored in a state where it is removed from the sprocket 22 during normal operation of the main drive unit 23.

  The positional relationship between the attachment position of the auxiliary drive unit 30 and other parts such as the transmitted part 33 is, for example, as follows. As shown in FIG. 1, the travel drive unit 6 is disposed on the −Y side with respect to the drive wheel 5, and the main drive unit 23 is on the opposite side (+ Y side) of the drive wheel 5 with respect to the travel drive unit 6. ). The transmitted portion 33 is provided on the −Y side of the sprocket 22, and as a result, is disposed between the sprocket 22 and the drive wheel 5. As shown in FIG. 1B, the driving force transmission unit 32 is disposed along the X direction. The auxiliary drive unit 31 is disposed on the −X side of the base frame 8 and is connected to the drive force transmission unit 32.

  Next, the auxiliary drive unit 30 will be described in detail together with other members such as the travel drive unit 6 and the main drive unit 23 supported by the base frame 8. FIG. 2 is a view showing a main part of the lifting device 1 to which the auxiliary drive unit 30 is attached. FIG. 2A shows a view from the Z direction, and FIG. 2B shows a view from the Y direction. The travel drive unit 5 is attached to the base frame 8 as described above and supports the drive wheels 5.

  The main drive unit 23 is supported by the base frame 8 and includes, for example, an electric motor, a speed reducer, and an encoder that detects the rotation of the electric motor. The main drive unit 23 is controlled by the controller 34. For example, the controller 34 servo-controls the electric motor using the detection result of the encoder of the main drive unit 23. The controller 34 may be integrated with a control device that controls driving of the drive wheels 5 and the rollers 11 (see FIG. 1), or may be provided separately from the control device.

  A sprocket 22 is fixed to the output shaft 23 a of the main drive unit 23. In FIG. 2, the chain 21 that meshes with the sprocket 22 is omitted. The transmitted portion 33 includes an adapter 35 that can be attached to and detached from the sprocket 22, and an adapter-side gear 36 that can be attached to and detached from the adapter 35. The sprocket 22, the adapter 35, and the adapter side gear 36 can rotate together.

  The adapter 35 is disposed on the opposite side of the sprocket 22 from the output shaft 23 a of the main drive unit 23. The adapter 35 is, for example, a rotationally symmetric shaft member, and is arranged coaxially with the sprocket 22. The adapter 35 has a large diameter part 35 a disposed on the connection side of the sprocket 22 and a small diameter part 35 b disposed on the connection side of the adapter side gear 36. Both the large diameter portion 35a and the small diameter portion 35b are axial and are formed coaxially. The outer diameter of the large diameter portion 35a is set to a size that can be inserted into a circular recess 22a formed on the -Y side of the sprocket 22, for example. The adapter 35 is fixed to the sprocket 22 by a fixing tool such as a bolt 37 at the large diameter portion 35a. Note that the shape of the adapter 35 is not limited to the illustrated shape, and the shape is arbitrary as long as the sprocket 22 and the adapter side gear 36 are integrated. Further, the adapter 35 may be made as a single body with the sprocket 22.

  The adapter side gear 36 is disposed on the opposite side of the sprocket 22 with respect to the adapter 35. The adapter side gear 36 is arranged coaxially with the adapter 35. The adapter side gear 36 is fixed to the small diameter portion 35 b of the sprocket 22 by a fixing tool such as a bolt 38. Note that the adapter side gear 36 may be manufactured integrally with the adapter 35. However, by configuring the transmitted portion 33 with the adapter 35 and the adapter side gear 36, for example, when the space between the sprocket 22 and the drive wheel 5 is narrow, the adapter 35 and the adapter side gear 36 are separately fixed. This makes it possible to mount in a narrow space. Furthermore, by changing the adapter 35, it becomes possible to attach the adapter side gear 36 to different types of sprockets, and versatility is improved.

  The auxiliary drive unit 31 is disposed on the −X side with respect to the drive wheel 5. A plate 40 is attached to the base frame 8, and the auxiliary drive unit 31 is supported on the plate 40. The plate 40 is formed with a strength capable of supporting the auxiliary driving unit 31 and its shape is arbitrary. The plate 40 is removed from the base frame 8 when the main drive unit 23 is in operation, but may be attached when the main drive unit 23 is in operation. When the plate 40 is removed, the auxiliary drive unit 31 is attached to the base frame 8 by a fixing tool such as a bolt when the auxiliary drive unit 31 is attached.

  The auxiliary drive unit 31 includes, for example, an electric motor, a speed reducer, and the like. The auxiliary drive unit 31 is controlled by a controller 41 different from the controller 34 of the main drive unit 23. The operator can switch the on / off of the electric motor and the rotation direction by operating the controller 41. The controller 41 may control the position of the lifting platform 20 using detection results of various sensors that detect the position information of the lifting platform, such as an encoder of the main drive unit 23. For example, the controller 41 may servo-control the electric motor of the auxiliary drive unit 31 using the detection results of various sensors so that the position or movement amount of the lifting platform 20 approaches the target value specified by the operator. .

  The driving force transmission unit 32 positions the output gear 42 fixed to the output shaft 31 a of the auxiliary driving unit 31, the intermediate gear 43 that meshes with the output gear 42 and the adapter side gear 36, and the output gear 42 and the intermediate gear 43. A connecting member 44. The intermediate gear 43 is disposed on the + X side with respect to the output shaft 31 a so as to mesh with the output gear 42.

  The intermediate gear 43 is disposed at one end of the connecting member 44. The intermediate gear 43 is rotatably supported by a bearing such as a bearing provided in the connecting member 44. The other end of the connecting member 44 is attached to the auxiliary driving unit 31. The connecting member 44 is attached to the auxiliary driving unit 31 so as to extend in the direction along the X direction. The connecting member may be provided to be rotatable around the output shaft 23a of the auxiliary driving unit 31, for example.

  The transmitted portion 33 includes a connection plate 45 that positions the adapter side gear 36 and the intermediate gear 43. One end of the connection plate 45 is attached to the adapter 35. The connecting plate 45 is rotatably supported with respect to the adapter 35 when the small diameter portion 35b of the adapter 35 passes through an opening 45a (see FIG. 2B) provided at one end. For example, a bearing or the like is disposed in the opening 45 a of the connection plate 45, and the opening 45 a may be a bearing of the small diameter portion 35 b of the adapter 35. The other end of the connecting plate 45 is provided with an opening 45 b (see FIG. 2B) and is connected to the rotating shaft 43 a of the intermediate gear 43. The rotating shaft 43a is supported by the connecting plate 45 by a fixture such as a bolt 45c through the opening 45b. Thereby, the adapter side gear 36 and the intermediate gear 43 are positioned.

  As described above, in the driving force transmitting portion 32, the output gear 42 and the intermediate gear 43 are positioned by the connecting member 44. Further, in the transmitted portion 33, the adapter side gear 36 and the intermediate gear 43 are connected by the connecting plate 45. Is positioned. Therefore, by driving the auxiliary drive unit 31, the rotation of the output shaft 31a is reliably transmitted from the output gear 42 to the adapter side gear 36 via the intermediate gear 43, and as a result, the sprocket 22 is rotated to lift the platform. 20 can be moved up and down reliably.

  Next, a method for attaching the auxiliary drive unit 30 will be described. 3 to 7 are process diagrams illustrating a method of attaching the auxiliary drive unit 30. In each of FIGS. 3 to 7, (A) shows a view seen from the Z direction, and (B) shows a view seen from the Y direction. 3 to 7, the chain 21 that meshes with the sprocket 22 is omitted.

  First, as shown in FIG. 3, the adapter 35 is attached to the sprocket 22. Here, by inserting the adapter 35 into which the bolt 37 has been inserted in advance into the recess 22a of the sprocket 22 from the gap between the drive wheel 5 and the sprocket 22, the adapter 35 is positioned coaxially with the sprocket 22. The Subsequently, the adapter 35 is fixed to the sprocket 22 by stopping the bolt 37 in the bolt hole of the sprocket 22. In addition, it is not limited to using the volt | bolt 37 for fixation of the adapter 35, Arbitrary fixing tools, such as a clamp, may be used. Further, at the stage where the adapter 35 is fixed, a gap is left between the drive wheel 5 and the sprocket 22 for the operator to insert a member.

  Next, as shown in FIG. 4, the connecting plate 45 is attached to the adapter 35. Here, after attaching a bearing (not shown) to the opening 45a of the connection plate 45, the connection plate 45 is inserted from the gap between the drive wheel 5 and the sprocket 22, and the small diameter portion 35b of the adapter 35 is inserted into the opening 45a. The bearing (not shown) has an inner diameter set to be substantially the same as the outer diameter of the small diameter portion 35 b of the adapter 35, and is disposed between the opening 45 a of the connection plate 45 and the small diameter portion 35 b of the adapter 35. A bearing (not shown) may be attached to the adapter 35 first, and the connection plate 45 may be attached to this bearing.

  The coupling plate 45 can be rotated with respect to the adapter 35 by a bearing as shown in FIG. When a member to be attached later is carried into the base frame 8 from the -X side, it can be rotated so that the -X side portion of the connecting plate 45 does not interfere with the carry-in.

  Next, as shown in FIG. 5, the adapter side gear 36 is attached to the adapter 35. Here, the adapter side gear 36 holding the bolt 38 is inserted through the gap between the drive wheel 5 and the connecting plate 45, and the bolt 38 is stopped in a bolt hole (not shown) provided in the small diameter portion of the adapter 35. The side gear 36 is fixed to the adapter 35. In addition, it is not limited to using the volt | bolt 38 for fixation of the adapter side gear 36, Arbitrary fixing tools, such as a clamp, may be used.

  The connecting plate 45 may be attached to the adapter side gear 36. In this case, a bearing or the like may be disposed between the connection plate 45 and the adapter side gear 36 so that the connection plate 45 can rotate with respect to the adapter side gear 36. The adapter side gear 36 is connected to the sprocket 22 via the adapter 35, but may be directly attached to the sprocket 22 without using the adapter 35, or may be integrated with the sprocket 22. Good. In this case, the adapter 35 is not necessary, so that the process of FIG. 3 can be omitted.

  3 to 5, the adapter 35, the connecting plate 45, and the adapter side gear 36 are each attached to the sprocket 22 in order, but at least two of these may be attached to the sprocket 22 after assembling in advance. Good. For example, the adapter 35, the connecting plate 45, and the adapter side gear 36 may be assembled in advance to form a unit, and this unit may be attached to the sprocket 22.

  The adapter 35 may be attached to the sprocket 22 in advance, or the main drive unit 23 may operate in a state where the adapter 35 is attached to the sprocket 22. In this case, the process of FIG. 3 can be omitted. Furthermore, the connection plate 45 and the adapter side gear 36 may be attached to the adapter 35 in advance, and the main drive unit 23 may operate in this state. In this case, the steps of FIGS. 4 and 5 can be omitted.

  Next, as shown in FIG. 6, the plate 40 is attached to the base frame 8. The plate 40 supports the auxiliary driving unit 31 and the driving force transmitting unit 32 shown in FIG. The plate 40 is provided with a cutout portion 40a for inserting and fixing the auxiliary drive portion 31. The plate 40 is fixed to the base frame 8 by a fixing tool such as a bolt. The plate 40 may remain attached during operation of the main drive unit 23, but is usually removed and stored.

  Next, as shown in FIG. 7, the auxiliary drive unit 30 is attached to the base frame 8. The auxiliary drive unit 30 is attached by fixing the auxiliary drive unit 31 to the plate 40. Here, the unitized auxiliary drive unit 31 and the driving force transmission unit 32 are carried in from the −X side, the auxiliary drive unit 31 is inserted into the notch 40a of the plate 40, and is fixed by a fixing tool such as a bolt (not shown). Temporarily fix. Subsequently, as shown in FIG. 8B, the connecting plate 45 is rotated around the rotating shaft of the sprocket 22, and the rotating shaft 43a of the intermediate gear 43 is fixed by the bolt 45c through the opening 45b of the connecting plate 45. To do. Thereby, the output gear 42, the intermediate gear 43, and the adapter side gear 36 are positioned with respect to each other, and a state in which they are engaged with each other is formed. Subsequently, the auxiliary drive unit 30 is attached to the elevating device 1 by tightening the bolt temporarily fixing the auxiliary drive unit 31 and fixing the bolt to the plate 40. However, the driving force transmission part 32 is not limited to being fixed using the plate 40, and may be fixed to the base frame 8 by a belt, for example. The controller 41 shown in FIG. 2 is connected to the auxiliary driving unit 31. When the auxiliary drive unit 31 does not have a built-in power source such as a battery, an external power source is connected to the auxiliary drive unit 31.

  Next, a usage example of the auxiliary drive unit 30 will be described. FIG. 8 is a conceptual diagram showing an example of use of the auxiliary drive unit 30. In FIG. 8, the automatic warehouse 2 includes two first and second transfer devices (stacker cranes) 1 </ b> A and 1 </ b> B that travel on the same rail 9. Each of the first and second transfer devices 4A and 4B has a lifting device similar to that shown in FIG. The first and second transfer devices 4A and 4B are arranged with the transfer device 25 facing each other.

  In FIG. 8A, in the first transfer device 4A, the transfer device 25 cannot be raised or lowered due to a failure or the like. The lifting platform 20 of the first transfer device 1 </ b> A is located at the lowermost end of the mast 10 and is stopped near the lowermost storage shelf 3 among the plurality of storage shelves 3. In such a case, the transfer device 25 of the first transfer device 4A is in the way, and the transfer device 25 of the second transfer device 4B cannot access the article OB2 (indicated by hatching). The other article OB1 can be accessed. Accordingly, when carrying out the article OB2 or carrying the article into the storage shelf 3, it is necessary to raise the stopped elevator 20 and to move the transfer device 25 upward. Here, the auxiliary drive unit 30 shown in FIG. 2 or the like is attached to the first transport device 4A, and as shown in FIG. 8B, the elevator 20 of the first transport device 4A is lifted to be retracted. it can. As a result, the transfer device 25 of the second transport device 4B can access the lowermost storage shelf 3, and can carry in or carry out the article OB2.

  As described above, in the present embodiment, even when the main drive unit 23 is stopped due to a failure or the like, the lifting platform 20 can be easily and reliably moved by the auxiliary drive unit 30. Moreover, the labor required for raising / lowering the lifting platform 20 can be reduced. In addition, since the auxiliary drive unit 31 can be attached to and detached from the base frame 8, it is possible to avoid applying an extra load to the transport device 4 by removing the auxiliary drive unit 31 in a normal state. Space can be achieved.

  Further, when the automatic warehouse 2 includes a plurality of transfer devices 4, an auxiliary drive unit 30 can be attached to the lifting device 1 of each transfer device 4, and if at least one auxiliary drive unit 30 is prepared, it is Even if any of the devices 1 breaks down, it is possible to cope.

  The embodiment has been described above, but the present invention is not limited to the above description, and various modifications can be made without departing from the gist of the present invention. For example, in the above-described embodiment, gears are used for the transmitted portion 33 and the driving force transmitting portion 32, but the present invention is not limited to this. For example, a sprocket or pulley may be used instead of the adapter side gear 36 or the output gear 42, and the driving force may be transmitted by a chain or belt. In the above-described embodiment, the three output gears 42, the intermediate gear 43, and the adapter side gear 36 are used from the output shaft 23a of the auxiliary driving unit 31 to the sprocket 22, but instead of this, two or four or more are used. The driving force may be transmitted using the gear.

DESCRIPTION OF SYMBOLS 1 ... Lifting device, 5 ... Drive wheel, 8 ... Base frame, 9 ... Rail (track), 10 ... Mast, 20 ... Lifting platform, 21 ... Chain ), 22... Sprocket (rotating body for driving), 23... Main drive section, 23 a... Output shaft, 30... Auxiliary drive unit, 31. Drive force transmitting part 33 ... transmitted part 35 ... adaptor 36 ... adapter side gear 42 ... output gear 43 ... intermediate gear 44 ... connecting member 45 ... Connection plates

Claims (5)

A lifting platform that can be lifted and lowered along a mast extending vertically from the base frame;
A cord-like body that is bridged over the mast and connected to the lifting platform;
A main drive unit that raises and lowers the lifting platform by driving a driving rotary body hung on a part of the cord-like body and moving the cord-like body;
A receiving portion that is provided on the driving rotating body and rotates integrally and receives a driving force of the auxiliary driving portion via a driving force transmitting portion provided in an auxiliary driving portion that can be attached to and detached from the base frame ;
The transmitted portion includes an adapter that can be attached to and detached from the driving rotating body, and an adapter-side gear that can be attached to and detached from the adapter.
The drive force transmission unit includes an output gear provided on an output shaft of the auxiliary drive unit, and an intermediate gear that meshes with the output gear and the adapter side gear . A connection plate for positioning the adapter side gear and the intermediate gear is provided in the transmitted portion,
The lifting device according to claim 1, wherein the driving force transmission unit includes a connecting member that positions the output gear and the intermediate gear. Wherein the transmission unit includes a drive wheel, wherein installed in the base frame by running on the track of the floor, the lifting device according to claim 1 or claim 2 is disposed between the drive rotational member. A lifting platform that can be moved up and down along a mast extending in a vertical direction from the base frame, a cord-like body that is spanned over the mast and connected to the lifting platform, and a driving rotation hung on a part of the cord-like body An auxiliary drive unit of an elevating apparatus comprising: a main drive unit that raises and lowers the elevating base by moving the cord-like body by driving a body,
An auxiliary drive unit detachable from the base frame;
A driving force transmitting portion that transmits the driving force of the auxiliary driving portion to a transmitted portion that is provided on the driving rotating body and rotates integrally;
The transmitted portion includes an adapter that can be attached to and detached from the driving rotating body, and an adapter-side gear that can be attached to and detached from the adapter.
The driving force transmission unit includes an output gear provided on an output shaft of the auxiliary driving unit , and an intermediate gear that meshes with the output gear and the adapter side gear . The auxiliary driving unit according to claim 4, wherein the driving force transmission unit includes a connecting member that positions the output gear and the intermediate gear.

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