JP2009107779A - Lifting chain changing device and usage thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lifting chain changing device capable of facilitating change work. <P>SOLUTION: The lifting chain changing device 26 is equipped with a feed-in sprocket 27 for winding and guiding a part extending downward from an upper sprocket in a new and old lifting chain 12c, a draw-out sprocket 28 which winds and guides so that a part extending from a lower sprocket 22 in the new and old lifting chain 12c extends upward from the upper place than the lower end of the lifting moving range of a lifting body 10 downward and the part extending downward positions at the opposite side of the position of the lower sprocket 22, and an association mechanism 29 for associating and connecting the feed-in sprocket 27 and the draw-out sprocket 28 so that the draw-out sprocket 28 rotates to a direction which draws out the new and old lifting chain 12c from the lower sprocket 28 accompanied by the rotation of the feed-in sprocket 27 to a direction which feeds in the new and old lifting chain 12c to the upper sprocket side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention includes a loop-shaped lifting chain having both ends connected to a lifting body and wound around an upper sprocket and a lower sprocket, and engaging the lifting chain to move the lifting chain along the longitudinal direction. The present invention relates to an elevating chain exchange device used in an elevating device provided with a drive sprocket that moves the elevating body up and down, and a method of using the elevating chain exchange device.

Such an elevating device is configured to move the elevating platform up and down by rotating the drive sprocket to move the elevating chain in the longitudinal direction. It will be used to carry (see, for example, Patent Document 1).
In such a lifting device, when the lifting chain becomes old, it is necessary to replace the lifting chain, that is, to replace the old lifting chain to be replaced that is mounted on the lifting device with a new lifting chain that is newly mounted on the lifting device. There is. When exchanging the lifting chain in this way, first, with the support member supporting the lifting platform above the lower end of the lifting movement range, both ends of the old lifting chain to be replaced are detached from the lifting body. Connect the end of the new lifting chain to be newly installed to the end of the part that extends downward from the upper sprocket in this old lifting chain, and then rotate the drive sprocket so that the new lifting chain Ensure that it is wrapped around the sprocket. In this state, the old lifting chain is detached from the end of the new lifting chain, and the end of the portion that extends downward from the upper sprocket and the end of the portion that extends upward from the lower sprocket are connected to the lifting body. Thus, the lifting chain is exchanged.
JP-A-5-238508

When exchanging the lifting chain as described above, when the drive sprocket is driven to rotate, the old and new lifting chains connected to the end of the new lifting chain are moved along the longitudinal direction at the end of the old lifting chain. In addition, if the old and new elevating chains drawn out from the lower sprocket accumulate near the lower sprocket, they will interfere with the old and new elevating chains drawn out from the lower sprocket, and the old and new elevating chains wrapped around the lower sprocket will loosen from the lower sprocket. In order to maintain the state where the old and new elevating chains are wound around the lower sprocket, and the part of the old and new elevating chains that are fed from the lower sprocket is removed from the vicinity of the lower sprocket. In old and new lifting chains The portion that is paid out from part sprocket workers had to pull.
In other words, when replacing the lifting chain, it is necessary for the operator to pull the part of the old and new lifting chain that is fed from the lower sprocket by rotating the drive sprocket. When the drive sprocket is driven to rotate, it is necessary to always pull the elevating chain, so that it is difficult to replace the elevating chain.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an elevating chain exchanging device capable of facilitating the exchanging operation of the elevating chain and a method of using the elevating chain exchanging device. In the point.

In order to achieve this object, an elevating chain exchanging device according to the present invention includes a loop elevating chain having both ends connected to an elevating body and wound around an upper sprocket and a lower sprocket, and the elevating chain. In combination, the elevating chain is used in an elevating device provided with a drive sprocket that moves the elevating body along the longitudinal direction to move the elevating body up and down.
The upper part in the old and new elevating chain formed by connecting the ends of the new elevating chain to be newly attached to the end of the part extending downward from the upper sprocket in the old hoisting chain to be replaced with both ends separated from the elevating body A sprocket for feeding and guiding a portion extending downward from the sprocket, and a portion extending upward from the lower sprocket in the old and new elevating chain so as to extend downward from a lower position of the lifting movement range of the lifting body. And a drawer sprocket that is wound and guided so that a portion extending downward is opposite to the side on which the lower sprocket is located, and the old and new elevating chains are fed in the direction to feed the upper sprocket to the upper sprocket side. As the telescoping sprocket rotates, the drawer sprocket So as to rotate in a direction to pull the chain from the lower sprockets, it lies in that the interlocking mechanism for interlocking connecting the sprocket and the drawer sprocket for infeed said is provided.

  That is, both ends of the old lifting chain are detached from the lifting body, and the end of the new lifting chain wound around the feeding sprocket is connected to the end of the old lifting chain that extends downward from the upper sprocket. The part extending upward from the lower sprocket in the lifting chain is wound around the pulling sprocket, and the drive sprocket is rotated in this state to move the new lifting chain in the longitudinal direction and wind it around the upper and lower sprockets. In this state, after the old lifting chain is detached from the new lifting chain, the end of the portion that extends downward from the upper sprocket and the portion that extends upward from the lower sprocket in the new lifting chain Elevating by connecting the end to the lifting body It is possible to exchange the old lifting chain to be replaced, which had been attached to the location to the new lifting chain newly attached to the lifting device.

  Then, as the feeding sprocket rotates in the direction of feeding the old and new lifting chains to the upper sprocket side, the drawer sprocket rotates in the direction of pulling out the old and new lifting chains from the lower sprocket, and the drawer sprocket The part that extends upward from the lower sprocket in the old and new lifting chains extends downward from the lower part of the lifting movement range of the lifting body, and the part that extends downward is opposite to the side where the lower sprocket is located. As the sprocket for feeding rotates in the direction to feed the old and new lifting chains to the upper sprocket, the old and new lifting chains are wound around the lower sprocket by the rotation of the pulling sprocket. From the lower sprocket while maintaining And feeding the a position, it is possible to dwell the old and new elevator chain at a place away from the lower sprockets.

That is, the drive rotating body of the lifting device is driven to rotate in a state where the part extending downward from the upper sprocket in the old and new lifting chains is wound around the feeding sprocket and the part extending upward from the lower sprocket is wound around the drawing sprocket. With this, the old and new elevating chains are drawn out to a place away from the lower sprocket while maintaining the state where the old and lower elevating chains are wound around the lower sprocket, and the new and old elevating chains are kept away from the lower sprocket. Since the chain stays away from the lower sprocket, there is no hindrance to the lifting / lowering chain being fed from the lower sprocket.
And when the amount of staying is increased, the chain stays out of the chain part that is drawn out from the drawer sprocket to extend downward, but it needs to be removed when the amount of staying increases. The work is performed intermittently when the staying amount increases, and it is difficult to place a heavy burden on the worker.
In short, when replacing the lifting chain, there is no need for special work, and the old and new lifting chains that keep the old and new lifting chains wound around the lower sprocket and the old and new lifting chains that are unwound from the lower sprocket are continuously unwound. Although it becomes possible to avoid getting in the way, and when the amount of retention of the old and new lifting chains that are drawn out from the sprocket for drawing out increases, it is necessary to intermittently perform the work of removing the accumulated chain, Since the work is intermittent, it does not place a heavy burden on the operator, and therefore, an elevating chain exchanging device capable of facilitating the elevating chain exchanging work has been provided.

  According to a second characteristic configuration of the lifting chain exchanging device according to the present invention, in the first characteristic configuration, a support member for mounting and supporting the lifting body at a position above the lower end of the lifting movement range is provided. The feed sprocket and the drawer sprocket that are interlocked and connected to each other are attached to the support member.

  In other words, the lifting body is supported by a support member at a position above the lower end of the lifting movement range so that the lifting body from which the lifting chain is detached can be supported at a height at which the lifting chain can be easily replaced. In addition, the support member is equipped with a feeding sprocket and a drawing sprocket that are linked and linked by a linkage mechanism, so that the feeding sprocket and the drawing sprocket are provided at a suitable height. It is possible to simplify the configuration of the lifting chain exchange device without providing a separate support base, and to provide the lifting chain replacement device capable of simplifying the configuration. It came.

  A third characteristic configuration of the lifting chain exchanging device according to the present invention is the first or second characteristic configuration, wherein the interlock mechanism supports a rotating shaft that supports the feeding sprocket and the drawing sprocket in a state of rotating integrally. It is in the point where it is prepared.

  That is, the interlocking mechanism is provided with a rotating shaft that supports the feeding sprocket and the drawing sprocket in a state of rotating together, so that the feeding sprocket and the drawing sprocket rotate integrally on the same rotation axis. By supporting, the structure of the interlocking mechanism can be simplified, and the interlocking mechanism can be made small in the direction intersecting with the rotation axis of the feeding sprocket and the drawing sprocket. Therefore, it has become possible to provide a lifting chain exchanging device that can be configured compactly.

  According to a fourth characteristic configuration of the lifting chain exchanging device according to the present invention, in the third characteristic configuration, the rotating mechanism and the drawer are operated in a state where the interlocking mechanism is applied with a force less than a set torque on the drawer sprocket. A torque transmitting means for rotating the rotating shaft and the drawing sprocket relative to each other in a state in which a force exceeding a set torque is applied to the drawing sprocket. It is in a point that it is provided in a state of being interposed between the drawing sprockets.

  In other words, if the pitch length of the old and new elevating chain to be pulled out (old elevating chain) is longer than the pitch length of the old and new elevating chain (new elevating chain) that is sent in due to aging, it will be fed from the upper sprocket. Compared with the old and new lifting chains, the old and new lifting chains that are delivered from the lower sprocket are longer, and the part of the new and old lifting chains that is located between the feeding sprocket and the drawer sprocket is shortened. There is a possibility that the old and new lifting chains will break due to high tension, but when the force exceeding the set torque is applied to the drawer sprocket due to the action of the torque transmission means, the rotating shaft and the drawer sprocket Because of relative rotation, the sprocket for feeding and If the part located between the sprocket for drawing is shortened, a force exceeding the set torque is applied to the drawing sprocket and the rotating shaft and drawing sprocket rotate relative to each other. The part located between the drawer sprockets is not shortened too much, the tension of the old and new lifting chains is prevented from becoming too high, and the old and new lifting chains can be prevented from being cut. Thus, it has become possible to provide an elevating chain exchanging device capable of preventing the old and new elevating chains from being cut when exchanging the chains.

  According to a fifth characteristic configuration of the lifting chain exchanging device according to the present invention, in the third or fourth characteristic configuration, the interlocking mechanism sends the new and old lifting chains of the feeding sprocket to the side where the upper sprocket is located. One-way rotating means for restricting rotation in a direction and permitting rotation in a direction in which the old and new elevating chains in the feeding sprocket are pulled out to the side opposite to the side on which the upper sprocket is located It exists in the point comprised and prepared in the state interposed between a sprocket and the said rotating shaft.

  In other words, even if the feeding sprocket is rotated relative to the rotating shaft in the direction in which the old and new lifting chains are pulled out, the feeding sprocket does not rotate in the direction of feeding the old and new lifting chains due to the action of the one-way rotating means. Elevator chain replacement that can be used to tension old and new elevating chains with a simple operation by simply rotating the sprocket for rotation relative to the rotation axis in the direction of pulling out the old and new elevating chains. The device can be provided.

A method for using the lifting chain changer according to the present invention is a method for using the lifting chain changer according to any one of the first to fifth characteristic configurations,
The characteristic configuration is that the both ends of the old elevating chain are detached from the elevating body, and the new elevating chain is wound around the feeding sprocket at the end of the old elevating chain extending downward from the upper sprocket. End portions of the old elevating chain, the portion extending upward from the lower sprocket is wound around the drawer sprocket, and the new elevating chain is wound around the upper sprocket and the lower sprocket. The drive sprocket is driven to rotate, the old lifting chain is detached from the end of the new lifting chain, and the end of the new lifting chain that extends downward from the upper sprocket and the portion that extends upward from the lower sprocket This is in the point of connecting the end of the lift to the lifting body.

  In other words, as shown in the first feature configuration, the old lifting chain to be replaced that has been mounted on the lifting device can be replaced with a new lifting chain that is newly mounted on the lifting device. It is not necessary to remove the old and new elevating chains from the vicinity of the lower sprocket when the rotary drive is being driven, or the frequency of removal can be reduced, making it easier to replace the elevating chains, thus making it easier to replace elevating chains. It has come to be able to provide a method of using a lifting and lowering chain exchanging device that can be achieved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a stacker crane 3 as an elevating device is a fork that transfers articles between a traveling carriage 8 that can travel in the front-rear direction along a traveling rail 4 and a storage shelf (not shown). A lifting platform 10 as a lifting body provided with a device 9; a pair of front and rear lifting masts 11 which are erected on the traveling carriage 8 to guide and support the lifting platform 10 so as to be movable up and down; and both ends are connected to the lifting platform 10; The loop-like lifting chains 12F and 12R wound around the upper sprocket 21 and the lower sprocket 22 and the lifting chains 12F and 12R are engaged with the lifting chains 12F and 12R to move the lifting chains 12F and 12R along the longitudinal direction. A drive sprocket 19 for moving the lifting platform 10 up and down is provided.
An upper frame 13 is installed over the upper ends of the pair of front and rear lifting masts 11, and a guide roller 15 that contacts the upper rail 13 and the guide rail 14 to restrict the horizontal swing of the stacker crane 3. Is provided.

Next, the stacker crane 3 will be described. The direction along the traveling direction of the stacker crane 3 is the front-rear direction, the direction orthogonal to the front-rear direction is the lateral width direction, and one side in the front-rear direction (left side in FIG. 1) is the front. Side, the other side in the front-rear direction (right side in FIG. 1) will be described as the rear side.
The traveling carriage 8 includes a propulsion driving traveling wheel 17 driven by a traveling driving motor 16 and a rotatable driven traveling wheel 18, and the driving traveling wheel 17 is rotationally driven by the traveling driving motor 16. Thus, the traveling carriage 8 is configured to travel on the traveling rail 4 along the front-rear direction.
The lifting platform 10 is suspended and supported by looped lifting chains 12F and 12R that are wound around the drive sprocket 19, and the drive sprocket 19 is driven to rotate by the lift drive motor 20. The lifting platform 10 is configured to move up and down along the lifting mast 11.
The travel drive motor 16, the lift drive motor 20, and the drive sprocket 19 are provided at the rear end of the travel carriage 8 so as to be located rearward of the pair of front and rear lift masts 11. Is engaged with a portion located between the upper sprocket 21 and the lower sprocket 22 in the pair of lifting chains 12F and 12R.

As shown in FIGS. 1 and 2, as a pair of elevating chains 12 </ b> F and 12 </ b> R, the elevating chain 12 </ b> F on the front side that suspends and supports the front end portion of the elevating platform 10, and the rear end portion of the elevating platform 10 is suspended and supported. A rear lifting chain 12R is provided.
The front elevating chain 12F is wound and guided so that one end side portion extends downward by a plurality of upper sprockets 21 provided at the front portion and the rear portion of the upper frame 13, and the end portion thereof is raised and lowered by the elevating platform 10. Is connected to the front end portion of the vehicle from above, and the other end portion is wound and guided so as to extend upward by a plurality of lower sprockets 22 provided at the front portion and the rear portion of the traveling carriage 8, and the end portion is raised and lowered. The front end of the base 10 is connected from below.
The rear lifting chain 12 </ b> R is wound and guided so that one end side portion extends downward by a single upper sprocket 21 provided at the rear portion of the upper frame 13, and its end portion is located behind the lifting platform 10. It is connected to the end portion from above, and the end portion on the rear end side is wound and guided so as to extend upward by a plurality of lower sprockets 22 provided at the rear portion of the traveling carriage 8, and the end portion is the rear of the lifting platform 10. It is connected to the end from below.

One of the lower sprockets 22 is configured as a tension sprocket 23 that is urged to the side where the elevating chains 12F and 12R exist by an urging mechanism (not shown). A guide sprocket 24 for guiding the pair of elevating chains 12F and 12R is provided between the upper sprocket 21 and the drive sprocket 19.
Then, the drive sprocket 19 is rotated forward and backward by the lift drive motor 20 to move the pair of lift chains 12F and 12R in the longitudinal direction while being tensioned by the tensioning procket 21, and the lift platform 10 moves up and down.

When exchanging the lifting chains 12F and 12R of the stacker crane 3, that is, when exchanging the old lifting chain 12a to be replaced attached to the stacker crane 3 with the new lifting chain 12b newly attached to the stacker crane 3. As shown in FIG. 3, this is performed by using a chain exchanging device 26.

For ease of understanding in the drawings, in FIG. 3, the new elevating chain 12a is indicated by a double line, and the old elevating chain 12b is indicated by a single line. In FIGS. 12a is indicated by a single line, and the old lifting chain 12b is indicated by a one-dot chain line. A chain formed by connecting the end of the new elevating chain 12b to the end of the old elevating chain 12a is referred to as an old and new elevating chain 12c. Moreover, as shown in FIG. 4, the old raising / lowering chain 12a and the new raising / lowering chain 12b are each comprised with the double chain.

  As shown in FIG. 3, the chain exchanging device 26 is newly attached to the end of the part extending downward from the upper sprocket 21 in the old hoisting chain 12 a to be exchanged whose both ends are separated from the hoisting base 10. A sprocket 27 for feeding and guiding a portion extending downward from the upper sprocket 21 in the old and new elevating chain 12c formed by connecting ends of the elevating chain 12b, and extending upward from the lower sprocket 22 in the old and new elevating chain 12c. A drawing sprocket 28 for winding and guiding the part, an interlocking mechanism 29 for interlockingly connecting the feeding sprocket 27 and the drawing sprocket 28, and the lifting platform 10 above the lower end of its lifting movement range. Support column 30 as a support member for mounting and supporting, and the feeding sprawl It is constituted by a new elevator chain support mechanism 31 for hanging support in a state where the wound new lifting chain 12b to be written sent to Tsu bets 27.

The new lifting chain support mechanism 31 includes a front winding drum 35 that winds the front new lifting chain 12b, and a rear winding drum 35 that winds the rear new lifting chain 12b. Each of the pair of winding drums 35 is rotatably provided and is provided with a suspension support 36 configured to be supported by suspension on the lifting platform 10.
The suspension support 36 supports the pair of winding drums 35 in a vertically aligned state by supporting the pair of winding drums 35 with a pair of support portions 36a having different lengths. It is configured.

  As the support columns 30, a pair of front and rear support columns 30 including a support column 30 for mounting and supporting the front end portion of the lifting platform 10 and a support column 30 for mounting and supporting the rear end portion of the lifting platform 10 are provided. Each of the pair of front and rear support columns 30 is placed on the traveling carriage 8 and the middle part between the upper and lower sides is fastened to the lift mast 11 by the fastening belt 34, so that the lift mast 11 and the lift mast 11 are arranged in the front-rear direction. It can be erected in a lined state, and is configured to place and support one end portion in the front-rear direction of the lifting platform 10 having a set height in the erected state.

As shown in FIG. 4, each of the pair of front and rear support columns 30 is provided with a feeding sprocket 27 and a drawer sprocket 28 which are interlocked and connected by an interlocking mechanism 29. Each of the sprocket 27 and the pair of front and rear drawing sprockets 28 is mounted on the support column 30 so as to be located above the lower sprocket 22 and below the lifting platform 10.
Then, for each of the pair of front and rear sprockets 27 using the guide ring body 37, a portion extending downward from the upper sprocket 21 in the old and new elevating chain 12c is sequentially supplied from the upper sprocket 21 side. The upper and lower lifting masts 11 are wound in this order, and the pair of front and rear drawer sprockets 28 have portions extending upward from the lower sprocket 22 in the old and new lifting chains 12c in order from the lower sprocket 22 side. The drawer sprocket 28 is wound around the support column 30 side, the upper side, and the side away from the support column 30 in this order.
Incidentally, as shown in FIG. 3, the feeding sprocket 27 and the drawing sprocket 28 attached to the front support column 30 wrap around the front and rear lifting chains 12 c and guide them to the rear support column 30. The loaded sprocket 27 and the withdrawal sprocket 28 are configured to wind and guide the new and old lifting chains 12c on the rear side.

  Each of the pair of front and rear drawer sprockets 28 is mounted on the support column 30 as described above, so that the part extending upward from the lower sprocket 22 in the old and new lifting chain 12c is within the lifting movement range of the lifting platform 10. It is constructed so as to be wound and guided so as to extend downward from a position above the lower end, and as described above, the old and new elevating chain 12c is wound and the part extending upward from the lower sprocket 22 in the old and new elevating chain 12c is The portion extending in the direction is wound and guided so as to be located on the side opposite to the side on which the lower sprocket 22 is located.

The interlock mechanism 29 includes a rotation shaft 38 that supports the feeding sprocket 27 and the drawing sprocket 28 in a state of rotating together, and the feeding sprocket 27 and the drawing sprocket 28 are arranged in the direction of the rotation axis. It is configured to be supported by the rotary shaft 38 while being rotated along the same rotational axis, and as the interlocking mechanism 29, the front-side feed sprocket 27 and the front-side drawer sprocket 28 are interlocked. A pair of front and rear interlocking mechanisms 29 for the front side to be connected and for the rear side for interlockingly connecting the rear-side feeding sprocket 27 and the rear-side drawing sprocket 28 are provided.
Each of the pair of front and rear interlocking mechanisms 29 is rotatably supported by a support plate 39 having a rotary shaft 38 connected and supported by a support column 30 and is fed to one end of the rotary shaft 38 at the rear of the axis. An artificially operated operation lever 40 for rotating the sprocket 27 and the drawer sprocket 28 is provided. By manually rotating the operation lever 40, the rotary shaft 38 is rotated to rotate the feeding sprocket. 27 and the drawer sprocket 28 can be rotated.

Further, as shown in FIG. 5, each of the pair of front and rear interlocking mechanisms 29 causes the rotating shaft 38 and the drawer sprocket 28 to move in a state where a force equal to or less than a set torque is acting on the drawer sprocket 28. The torque keeper 41 is rotated as a torque transmitting means for rotating the rotating shaft 38 and the drawing sprocket 28 relative to each other while the force exceeding the set torque is applied to the drawing sprocket 28. It is configured so as to be interposed between the shaft 38 and the drawer sprocket 28.
Further, each of the pair of front and rear interlocking mechanisms 29 regulates the rotation of the feeding sprocket 27 in the direction of feeding the new and old lifting chain 12c to the side where the upper sprocket 21 is located, and the feeding sprocket 27 A one-way clutch 42 serving as a one-way rotating means that allows the old and new elevating chain 12c of the sprocket 27 to be pulled out in a direction opposite to the side where the upper sprocket 21 is located is connected to the feeding sprocket 27 and the rotating shaft. 38 in a state of being interposed between them.

That is, in each of the pair of front and rear interlocking mechanisms 29, the drive sprocket 19 is rotationally driven so as to move the lifting platform 10 upward, so that the portion extending downward from the upper sprocket 21 in the old and new lifting chain 12c is directed to the upper sprocket 21 side. The sprocket 27 for feeding is rotated to rotate, and the sprocket 28 for rotation rotates with the rotation of the sprocket 27 for feeding, and a portion extending upward from the lower sprocket 22 is pulled out from the lower sprocket 22 side. ing.
When the tension of the old and new elevating chain 12c increases and the torque on the drawer sprocket 28 becomes equal to or higher than the set torque, the drawer sprocket 28 rotates relative to the feeding sprocket 27 by the action of the torque keeper 41, and the old and new It is comprised so that tension | tensile_strength of the raising / lowering chain 12c may not become high too much.
Further, the one-way clutch 42 is operated by rotating the operation lever 40 so that the feeding sprocket 27 rotates in the direction in which the old and new elevating chain 12c is pulled out to the side opposite to the side where the upper sprocket 21 is located. The sprocket 27 can be rotated so as to rotate relative to the drawer sprocket 28, and the tension of the new and old lifting chain 12c can be increased.

Next, a method of using the chain exchanging device (an exchanging method of the lifting chains 12F and 12R) will be described.
First, as shown in FIG. 6, both end portions of the old lifting chain 12a are detached from the lifting platform 10, and the feeding sprocket is attached to the end portion of the old lifting chain 12a extending downward from the upper sprocket 21. 27, the end portion of the new elevating chain 12b wound around 27 is connected, the portion of the old elevating chain 12a extending upward from the lower sprocket 22 is wrapped around the drawer sprocket 28, and the new elevating chain 12b is The drive sprocket 19 is rotationally driven so as to be wound around the sprocket 21 and the lower sprocket 22, and the old lifting chain 12a is detached from the end of the new lifting chain 12b. A portion extending downward from the upper sprocket 21 End and by connecting the end of the portion extending upwardly from the lower sprocket 22 on the lifting table 10, replacing the lifting chain 12F, the 12R from the old lift chains 12a new lifting chain 12b.

  The use of the chain exchanging device will be described. The elevator 10 is raised to such an extent that the support column 30 can be installed, and after the pair of front and rear support columns 30 are installed, the elevator table 10 is lowered and the pair of front and rear support columns. 30 and supporting the new elevating chain support mechanism 31 on the elevating platform 10 in a state where the elevating platform 10 is placed and supported at the set height by the pair of front and rear support columns 30 as described above. The both ends of the old lifting chain 12a on the side and the both ends of the old lifting chain 12a on the rear side are separated from the lifting platform 10.

Then, as shown in FIG. 6, after the front new elevating chain 12b is pulled out from the front take-up drum 35 and wound around the front sprocket 27, the front new elevating chain 12b Is connected to the end of a portion extending downward from the upper sprocket 21 in the old lifting chain 12a on the front side separated from the lifting platform 10, and extends upward from the lower sprocket 22 in the old lifting chain 12a on the front side. The portion is wound around the drawer sprocket 28. Similarly to the new elevating chain 12b on the front side, the new elevating chain 12b on the rear side is pulled out from the take-up drum 35 for the rear side and wound around the feeding sprocket 27 on the rear side. The end of the new elevating chain 12b is connected to the end of the portion extending downward from the upper sprocket 21 in the old elevating chain 12a on the rear side separated from the elevating platform 10, and like the old elevating chain 12a on the front side, A portion extending upward from the lower sprocket 22 in the old lifting chain 12a on the rear side is wound around the rear sprocket 28.
By the way, with the old and new elevating chain 12c wound around the feeding sprocket 27 and the drawing sprocket 28, the feeding sprocket 27 is rotated in the direction to be drawn out in the direction opposite to the side where the upper sprocket 21 is located. The lever 40 is rotated to tension the old and new lifting chains 12c.

  Then, the drive sprocket 19 is rotationally driven so that a portion extending downward from the upper sprocket 21 of the pair of front and rear lifting chains 12 c is sent to the upper sprocket 21 side and a portion extending upward from the lower sprocket 22 is sent from the lower sprocket 22. Then, the pair of front / rear chains 12c are moved along the longitudinal direction in a synchronized state, and the pair of front / rear chains 12a as shown in FIG. 6 are wound around the upper sprocket 21 and the lower sprocket 22, respectively. 9, FIG. 9, and FIG. 8 (the reconnection of the lifting chain from the state shown in FIG. 7 to the state shown in FIG. 8 will be described later). Each of the pair of front and rear new elevating chains 12b as shown in FIG. Serial and wound about a state in the lower sprocket 22.

Thereafter, the old lifting chain 12a on the front side is detached from the end of the new lifting chain 12b on the front side, and the end of the portion extending downward from the upper sprocket 21 in the new lifting chain 12b on the front side and upward from the lower sprocket 22 The end portion of the extending portion is connected to the front end portion of the lifting platform 10, and the old lifting chain 12a on the rear side is detached from the end portion of the new lifting chain 12b on the rear side, and the upper sprocket in the new lifting chain 12b on the rear side The end of the portion extending downward from 21 and the end of the portion extending upward from the lower sprocket 22 are connected to the rear end of the lifting platform 10 so that the front lifting chain 12F and the rear lifting chain 12R are respectively connected. The old lifting chain 12a is replaced with the new lifting chain 12b. When the new lifting chain 12b is long when the new lifting chain 12b is connected to the lifting platform 10, both ends of the new lifting chain 12b are connected to the lifting platform 10 after being cut to an appropriate length.
Then, in a state where the new lifting chain 12b on the front side and the new lifting chain 12b on the rear side are connected to the lifting platform, the driving sprocket 19 is rotationally driven to raise the lifting platform 10, and the lifting platform 10 is moved to the new front chain. A pair of front and rear support columns 30 are removed in a state of being supported by being suspended by the elevating chain 12b and the new elevating chain 12b on the rear side.
Incidentally, the joint link 43 used when connecting the old elevating chain 12a and the new elevating chain 12b is colored so that it is easy to confirm the connection location of the old elevating chain 12a and the new elevating chain 12b in the old and new elevating chain 12c. ing.

Next, reconnection of the lifting chain from the state shown in FIG. 7 to the state shown in FIG. 8 will be described.
From the state shown in FIG. 6, the drive sprocket 19 is rotationally driven so as to move the elevator 10 upward, and as shown in FIG. 7, the new lifting chain 12 b on the rear side is fed with the sprocket 27, the upper sprocket 21, At the stage where the lower sprocket 22 and the drawer sprocket 28 are wound, the rotational driving of the drive sprocket 19 is temporarily stopped.
Incidentally, at this stage, since the front lifting chain 12F is longer than the rear lifting chain 12R, the new lifting chain 12b on the front side is wound around the feed sprocket 27 and the upper sprocket 21. Is not yet wound around the lower sprocket 22 and the drawer sprocket 28.

Then, from this state, the rear lifting / lowering chain 12a is detached from the end of the portion extending downward from the drawer sprocket 28 in the rear lifting / lowering chain 12b, and only the front lifting / lowering chain 12b is used. A portion extending downward from the drawer sprocket 28 in the old elevating chain 12a on the front side is separated at the middle portion of the new elevating chain 12c on the front side.
Then, as shown in FIG. 8, the end of the portion extending downward from the upper sprocket 21 in the new lifting chain 12b on the rear side is connected to the end of the portion extending downward from the drawer sprocket 28 in the old lifting chain 12a on the front side. Then, the end of the portion extending downward from the upper sprocket in the new lifting chain 12b on the front side is connected to the end of the portion extending downward from the drawer sprocket 28 in the new lifting chain 12b on the rear side.

  Thereafter, the drive sprocket 19 is rotated again so as to move the elevator 10 upward, and as shown in FIG. 9, the rear new elevating chain 12b and the front new elevating chain 12b are replaced by the upper sprocket 21 and the lower sprocket. At the stage of being wound around the motor 22, the rotational drive of the drive sprocket 19 is stopped.

[Another embodiment]
(1) In the above embodiment, the take-up drum 35 for winding the new elevating chain 12b is provided and the take-up drum 35 is suspended and supported by the elevating platform 10 using the new elevating chain support mechanism 31. The winding drum 35 may be placed and supported on the lifting platform 10 or the floor surface by using the lifting chain support mechanism 31, and the new lifting chain 12b is moved on the floor surface without the winding drum 35. It may be.
In the above-described embodiment, the feeding sprocket 27 and the drawer sprocket 28 that are linked and linked by the linkage mechanism 29 are mounted on the support member 30. The sprocket 27 and the drawer sprocket 28 are mounted on the lifting mast 11 without being mounted on the support member 29, or mounted on a dedicated sprocket support member standing on the floor, the traveling carriage 8 or the lifting platform 10. You may let them.

  In other words, for example, the new elevating chain 12b is placed on the floor surface without the take-up drum 35, and the feeding sprocket 27 and the drawing sprocket 28 that are interlocked and connected by the interlocking mechanism 29 are connected to the elevator 10 10, when the sprocket support member 43 is installed on the lifting platform 10 as shown in FIG. 10, the interlock mechanism 29 is connected to the sprocket support member 43. A sprocket 27 for delivery and a sprocket 28 for withdrawal which are interlocked and connected to each other are mounted, and a guide sprocket 37 is used for each of the pair of front and rear sprockets 27 for the upper and lower sprockets in the old and new elevating chain 12c. A portion extending downward from 21 is wound around the guide mast 11 side and the lower side in order from the upper sprocket 21 side. In each of the drawing sprockets 28, the portions extending upward from the lower sprocket 22 in the old and new elevating chain 12 c are arranged on the support column 30 side, the upper side, and the side away from the support column 30 of the drawing sprocket 28 in order from the lower sprocket 22 side. You may make it wind up in order and the part on the opposite side to the side connected with the old raising / lowering chain 12a in the new raising / lowering chain 12b may be turned on a floor surface.

(2) In the above embodiment, the support member 30 is erected on the traveling carriage 8 to place and support the lifting platform 10. However, the supporting member 30 is connected to the lifting mast 11 and the lifting platform 10 is connected to the lifting platform 10. You may comprise so that mounting may be carried out.

(3) In the above embodiment, the interlocking mechanism 29 includes the torque transmitting means 41 and the one-way rotating means 42, but the interlocking mechanism 29 includes the torque transmitting means 41 and the one-way rotating means 42. The interlocking mechanism 29 may be configured without the torque transmission means 41 and the one-way rotation means 42.

(4) In the above embodiment, as the lifting chains 12F and 12R, the front lifting chain 12F and the rear lifting chain 12R are provided, and the lifting platform 10 is suspended by a pair of front and rear lifting chains 12F and 12R. Although it is configured so as to be supported, as the lifting chain 12R, only the rear lifting chain 12R may be provided, and the lifting platform 10 may be supported by being suspended by the rear lifting chain 12R.

(5) In the above embodiment, the rear new lifting chain 12b is wound around the upper sprocket 21 and the lower sprocket 22, and the front new lifting chain 12b is wound only on the upper sprocket 21. In this state, the drive sprocket 19 is temporarily stopped, and after the elevating chains 12F and 12R are changed from the state shown in FIG. 7 to the state shown in FIG. 8, the drive sprocket 19 is rotated again. The new elevating chain 12b on the front side and the new elevating chain 12b on the rear side are wound around the upper sprocket 21 and the lower sprocket 22, but the drive sprocket 19 is not temporarily stopped ( Without changing the elevating chains 12F and 12R), the new elevating chain 12b on the front side and the rear side Lifting the chain 12b may be made such that a state of being wound around the upper sprocket 21 and lower sprocket 22.

Side view of stacker crane Diagram showing lifting chain Diagram showing lifting chain changer Perspective view showing interlocking mechanism Longitudinal front view showing interlocking mechanism The figure which shows the state in the middle of exchange of the raising / lowering chain The figure which shows the state in the middle of exchange of the raising / lowering chain The figure which shows the state in the middle of exchange of the raising / lowering chain The figure which shows the state in the middle of exchange of the raising / lowering chain The figure which shows the raising / lowering chain exchange apparatus in another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Lifting device 10 Lifting body 12F Lifting chain 12R Lifting chain 12a Old lifting chain 12b New lifting chain 12c Old and new lifting chain 19 Drive sprocket 21 Upper sprocket 22 Lower sprocket 26 Lifting chain changer 27 Feeding sprocket 28 Drawer sprocket 29 Interlock mechanism 30 Support member 38 Rotating shaft 41 Torque transmitting means 42 Unidirectional rotating means

Claims (6)

Both ends are connected to the lifting body and looped lifting chain wound around the upper sprocket and the lower sprocket, and the lifting body is engaged with the lifting chain to move the lifting chain along the longitudinal direction. An elevating chain exchange device used in an elevating device provided with a drive sprocket for moving up and down,
The upper part in the old and new elevating chain formed by connecting the ends of the new elevating chain to be newly attached to the end of the part extending downward from the upper sprocket in the old hoisting chain to be replaced with both ends separated from the elevating body A sprocket for feeding and guiding a portion extending downward from the sprocket;
A portion extending upward from the lower sprocket in the old and new lifting chains extends downward from a position above the lower end of the lifting movement range of the lifting body, and a portion extending downward is a side where the lower sprocket is located. Is a drawer sprocket that winds and guides it so that it is located on the opposite side,
The feeding sprocket so that the drawer sprocket rotates in the direction of pulling out the old and new lifting chain from the lower sprocket as the feeding sprocket rotates in the direction of feeding the old and new lifting chain toward the upper sprocket. Lifting chain exchange device provided with an interlocking mechanism for interlockingly connecting the sprocket for use and the sprocket for withdrawal.   A support member is provided for mounting and supporting the lifting body at a position above the lower end of the lifting and lowering movement range, and the feeding sprocket and the drawing sprocket linked together by the interlocking mechanism are attached to the supporting member. The lifting chain changer according to claim 1, which is attached.   The elevating chain exchanging device according to claim 1 or 2, wherein the interlocking mechanism includes a rotating shaft that supports the feeding sprocket and the drawing sprocket in a state of rotating integrally.   In the state where the interlocking mechanism is exerting a force equal to or less than a set torque on the drawer sprocket, the rotating shaft and the drawer sprocket are rotated together and exceed the set torque with respect to the drawer sprocket. The torque transmitting means for rotating the rotating shaft and the drawing sprocket relative to each other in a state where a force is applied is provided with being interposed between the rotating shaft and the drawing sprocket. Lifting chain changer.   The interlocking mechanism restricts rotation of the feeding sprocket in the direction of feeding the old and new lifting chains to the side where the upper sprocket is located, and the old and old lifting chains in the feeding sprocket are used as the upper sprocket. 5. A unidirectional rotating means for allowing rotation in a direction to be pulled out in the direction opposite to the side where the slidable is located is provided between the feeding sprocket and the rotating shaft. The lifting chain changer as described. It is a usage method of the raising / lowering chain replacement | exchange apparatus of any one of Claims 1-5,
Remove both ends of the old lifting chain from the lifting body,
The end of the new elevating chain that is wrapped around the feeding sprocket is connected to the end of the portion that extends downward from the upper sprocket in the old elevating chain,
A portion extending upward from the lower sprocket in the old lifting chain is wrapped around the drawer sprocket,
Rotating the drive sprocket so that the new lifting chain is wound around the upper sprocket and the lower sprocket,
Remove the old lifting chain from the end of the new lifting chain,
The use method of the raising / lowering chain replacement | exchange apparatus which connects the edge part of the part extended from the said upper sprocket in the said new raising / lowering chain and the edge part of the part extended upwards from the said lower sprocket to the said raising / lowering body.

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