JP6066625B2 - Stacker crane - Google Patents

Description

The present invention relates to a stacker crane that conveys articles.

In an automatic warehouse or the like, a stacker crane is used for loading and unloading articles. The stacker crane moves on the traveling rail by driving wheels, and moves up and down the carriage to acquire and transport articles.
A wheel support member to which a wheel is attached and a long mast to which a carriage is attached to be movable up and down are generally connected to a lower frame. Specific examples thereof are described in Patent Documents 1 and 2. ing.

The stacker cranes of Patent Documents 1 and 2 include two masts and two wheel support members, one mast and one wheel support member are connected to one end of the lower frame, and the other mast and the other wheel support. The member is connected to the other end of the lower frame.
The two masts are kept standing by the wheels respectively attached to the two wheel support members coming into contact with the traveling rail. Since the carriage moves up and down while being guided by the mast, the carriage can be moved up and down in the vertical direction by keeping the mast in the vertical direction.

JP 2009-269931 A JP 11-189309 A

By the way, in order to keep the mast accurately in the vertical direction, it is necessary that each of the connecting portions of the two masts and the two wheels have a predetermined relationship with each other.
While the relationship between the mast connection point and the wheel and the relationship between the two wheels can be adjusted by the arrangement of the wheel support member relative to the lower frame when assembling the stacker crane, the connection point between one mast and the other mast The relationship between the connection points is determined when the lower frame is processed.
Therefore, the lower frame needs to be precisely processed so that the connecting portion of one mast and the connecting portion of the other mast have a predetermined relationship.

Here, since the lower frame is a long member, the connecting position of the mast at one end of the lower frame and the connecting position of the mast at the other end of the lower frame are separated from each other. For this reason, without using a special processing device, it takes time and labor to process so that the connecting portion of one mast and the connecting portion of the other mast have a predetermined relationship. .
This invention is made | formed in view of this situation, and it aims at providing the stacker crane which can shorten manufacturing time, without using a special processing apparatus.

A stacker crane according to the present invention that meets the above-described object is a stacker crane including a lower frame, a wheel support member that is connected to the lower frame and has wheels attached thereto, and a mast to which a carriage is attached to be movable up and down. The lower frame includes two channel steels arranged in parallel, and the wheel support member includes two mast connecting portions, each having the same size and shape, and the two grooves. are respectively fixed to one end and the other end portion of the shaped steel, said mast, two had been, is lower respectively fixed to the mast coupling portion of each wheel support member is erected state is maintained, the two wheels A base material, which is a metal plate, is attached to one of the support members in a replaceable state, and a drive motor for raising and lowering the carriage is connected to the two wheels via the base material. It is only a fixed one of the support member.

In the stacker crane according to the present invention, the wheel support member is preferably a casting.

In the stacker crane according to the present invention, it is preferable that the mast connecting portion is supported from below by the lower frame.

In the stacker crane according to the present invention, the mast connecting portion is provided not on the lower frame but on the wheel support member. The wheel support member is smaller than the lower frame, and can be easily processed precisely without using a special processing device as compared with the lower frame. Therefore, it is possible to reduce the total time required for manufacturing the stacker crane.

It is a front view of the stacker crane concerning one embodiment of the present invention. It is a partial exploded perspective view of the same stacker crane. It is explanatory drawing of a wheel support member and a lower frame. It is explanatory drawing which shows the attachment to the wheel support member of a lower frame and a mast.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIG. 1, a stacker crane 10 according to an embodiment of the present invention includes a carriage 12 on which an article 11 is placed and two wheels 14 that roll on a traveling rail 13, and moves along the traveling rail 13. Then, the article 11 placed on the carriage 12 is conveyed to a desired place by moving the carriage 12 up and down.

The stacker crane 10 has a long lower frame 15 arranged in parallel with the traveling rail 13, and metal wheel support members 16 and 17 are connected to both ends of the lower frame 15, respectively. Hereinafter, the arrangement direction (longitudinal direction) of the traveling rail 13 is referred to as the front-rear direction.
As shown in FIGS. 2 to 4, the wheel support members 16 and 17 are formed long along the traveling rail 13 in the front-rear direction, and support the wheels 14 rotatably.

The wheel support members 16 and 17 include a wheel storage portion 18 that stores the wheel 14 on a side away from the center of the lower frame 15 (hereinafter referred to as a rear side). As shown in FIGS. 1 and 2, on the rear side of the wheel support members 16, 17, a pair of pillow units 20 that rotatably support an axle 19 connected to the wheel 14 is provided in a wheel storage portion 18. It is fixed outside. The wheel 14 is accommodated in the wheel accommodating portion 18 and attached to the wheel supporting members 16 and 17 by fixing the paired pillow unit 20 to the wheel supporting members 16 and 17.
The wheel 14 is rotated by being applied with a force from a drive motor (not shown).

As shown in FIG. 2, each pillow unit 20 includes a plurality of through holes 21, and the wheel support member 17 (the same applies to the wheel support member 16) has a plurality of through holes respectively corresponding to the plurality of through holes 21. A hole 22 is formed. Each pillow unit 20 is fixed to the wheel support member 17 at a position where the plurality of through holes 21 are respectively disposed immediately below the plurality of through holes 22. Specifically, each pillow unit 20 is attached to the wheel support member 17 by inserting a bolt 23 through the through holes 21 and 22 and screwing a nut (not shown) into the bolt 23.

On the rear side of the wheel support member 17 (the same applies to the wheel support member 16), as shown in FIG. 2, a motor installation unit 25 is provided above the wheel storage unit 18. A base material 26, which is a plate, is attached. A drive motor 27 that raises and lowers the carriage 12 is fixed to the motor installation portion 25 via the base material 26.
As described above, the drive motor 27 is fixed to the wheel support member 17 via the base member 26 so that the drive motors of various sizes can be fixed to the wheel support member by replacing only the base member. Because. If the drive motor is directly fixed to the wheel support member, it is necessary to design the wheel support member according to the size of the drive motor. The wheel support member has a complicated structure and a high manufacturing cost compared to the base material. For this reason, it is economically advantageous that drive motors of various sizes can be attached to the wheel support member only by replacing the base material.

As shown in FIG. 1, the drive motor 27 is attached to the wheel support member 17, but the drive motor 27 is not attached to the wheel support member 16.
The stacker crane 10 includes two long masts 28, and a carriage 12 is attached to the two masts 28 so as to be movable up and down.
The lower portions of the two masts 28 are fixed to the wheel support members 16 and 17, respectively, so that the standing state is maintained, and the carriage 12 is guided by the two standing masts 28 and can be moved up and down.
The carriage 12 and the drive motor 27 are connected by a wire rope 29, and the drive motor 27 raises the carriage 12 by winding the wire rope 29, and lowers the carriage 12 by feeding the wire rope 29.

As shown in FIGS. 2 and 4, the wheel support member 17 (the same applies to the wheel support member 16) includes a mast connection portion 30 on the center side (hereinafter referred to as the front side) of the lower frame 15, and this mast connection portion. The lower part of the mast 28 is fixed to 30 from above.
The mast connecting portion 30 is a rectangular plate-like object that is kept horizontally, and is disposed at the highest position on the front side of the wheel support member 17.

Here, in order to determine the mast angle of the mast connection location, it is necessary that the connection location of one mast and the connection location of the other mast have a predetermined relationship. If the mast connection points are provided at both ends of the lower frame, the lower frame is long, so the connection point of one mast and the connection point of the other mast will be separated, a special processing device It takes a long working time to precisely process the connecting portions of the two masts so as to have a predetermined relationship without using.

In the present embodiment, since one mast connecting portion is provided for one wheel support member, when the mast connecting portion is formed as compared with providing the mast connecting portion at one end and the other end of the lower frame. The processing is easy and the working time can be shortened.
In addition to the mast connection point, the wheel attachment point is required to be precisely processed, and in one wheel support member, the mast connection point and the wheel attachment point must have a predetermined relationship. In this respect, the wheel support member is smaller than the lower frame, and the distance between the mast connection point and the wheel attachment point is short, so the mast connection point and the wheel attachment point are precisely processed so as to have a predetermined relationship. It is easy to do.

The lower part of the mast 28 fixed to the mast connecting part 30 is a rectangular plate-like object, and is formed wider than the other part of the mast 28. This is because the contact surface where the mast 28 contacts the wheel support member 17 is enlarged without widening the entire mast 28 so that the standing state of the mast 28 can be kept stable.
A plurality of through holes 31 are formed in the lower portion of the mast 28 that is widened, and a plurality of through holes 32 corresponding to the plurality of through holes 31 are formed in the mast connecting portion 30. In the lower part of the mast 28, a plurality of through holes 31 are respectively arranged immediately above the plurality of through holes 32, and screw members 33 are inserted into the respective through holes 31 and 32, thereby being fixed to the mast connecting portion 30.

The lower frame 15 includes two long channel members 34 and 35 as shown in FIGS. The channel members 34 and 35 are channel steel, and have a long bottom plate portion 36 and long side wall portions 37 and 38 respectively connected to both ends of the bottom plate portion 36 in the width direction. The side wall portions 37 and 38 are kept perpendicular to the bottom plate portion 36.
Since the channel members 34 and 35 are general-purpose products, the lower frame 15 mainly composed of the two channel members 34 and 35 can be procured at low cost and is economical.

The channel members 34 and 35 have the front end portions (one end portions) of the channel members 34 and 35 fixed to the wheel support member 16 and the rear end portions (other end portions) of the channel members 34 and 35 fixed to the wheel support member 17. Thus, the bottom plates 36 of the channel members 34 and 35 are arranged in parallel with each other facing each other. At this time, the channel members 34 and 35 are arranged such that the side wall 38 is directly below the side wall 37.

As shown in FIG. 2, the wheel support member 17 (the same applies to the wheel support member 16) has a mast coupling portion 30 that travels in the left-right direction (horizontal direction and in plan view) as compared to a portion directly below the mast coupling portion 30. It is formed wide in the direction orthogonal to the rail 13). As shown in FIGS. 2 and 4, the wheel support members 16 and 17 are arranged in a state where the portion immediately below the mast connecting portion 30 is disposed between the bottom plate portion 36 of the channel material 34 and the bottom plate portion 36 of the channel material 35. The channel members 34 and 35 are fixed.

In the wheel support members 16 and 17 fixed to the channel members 34 and 35, the mast connecting portion 30 is placed on the side wall portion 37 of the channel members 34 and 35 via the reinforcing plate 39. Therefore, the wheel support members 16 and 17 are configured so that the mast connecting portion 30 is supported from below by the channel members 34 and 35, and the mast 28 erected on the mast connecting portion 30 is vertically moved without being displaced from a predetermined position. Can be kept stable.

As shown in FIG. 4, the channel members 34 and 35 are provided with a plurality of through holes 40 corresponding to the through holes 32 formed in the mast connecting portion 30 in the side wall portion 37 disposed on the upper side. The channel members 34, 35 are inserted into the plurality of through holes 40 with the screw members 33 inserted through the through holes 31 of the mast 28, the through holes 32 of the mast connecting portion 30, and the through holes of the reinforcing plate 39. Thus, the wheel support members 16 and 17 and the mast 28 are fixed.

The channel members 34, 35 are provided with a plurality of through holes 41 in the bottom plate portion 36, and a portion immediately below the mast connecting portion 30 of the wheel support members 16, 17 by a screw member 42 inserted through the plurality of through holes 41. The bottom plate portion 36 is fixed.
Moreover, in this Embodiment, the wheel support members 16 and 17 are castings formed by casting. Although the wheel support members 16 and 17 can be formed by machining or canning, the wheel support members 16 and 17 have a complicated structure. Compared to the above, processing as designed can be easily performed. Moreover, it becomes possible to manufacture the wheel support members 16 and 17 by an unmanned machining operation by using a casting, which is economical.

As shown in FIG. 1, the upper portions of the two masts 28 are connected by an upper frame 43, and wheels 44 are rotatably attached to both ends of the upper frame 43. Each wheel 44 rolls on a guide rail 45 arranged in parallel to the traveling rail 13 when the stacker crane 10 moves laterally, so that the stacker crane 10 can move laterally stably.
A control unit 46 that transmits a control signal to the drive motor 27 and the like is provided above the wheel support member 16, and stoppers 47 that determine the moving range of the stacker crane 10 are provided at both ends of the traveling rail 13. Is provided.

Next, a method for manufacturing the stacker crane 10 will be described.
First, the wheel support members 16 and 17 having the mast connecting portion 30 are formed by casting, the wheel support members 16 and 17 are fixed to the lower frame 15, and the pillow unit 20 is fixed to each of the wheel support members 16 and 17. The wheel 14 is attached. Then, the base material 26 is attached to the wheel support member 17, and the drive motor 27 is fixed to the wheel support member 17 via the base material 26. Thereafter, the lower portion of one mast 28 is fixed to the mast connecting portion 30 of the wheel support member 16 and the mast 28 is erected, and the front side (one side) of the carriage 12 is erected on the wheel support member 16. Attach to. Next, the lower part of another mast 28 is fixed to the mast connecting portion 30 of the wheel support member 17 so that the mast 28 is erected, and the mast 28 erected on the wheel support member 17 is placed on the rear side of the carriage 12 (others). After attaching the side), the wire rope 29 is connected to the carriage 12.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions and the like that do not depart from the gist are within the scope of the present invention.
For example, the stacker crane is not limited to the type in which the upper part is attached to the guide rail, and may be one that is placed on two traveling rails and maintained in a standing state.
Moreover, another elongate member can be employ | adopted for a lower frame instead of a channel material, for example, you may use an angle material (an angle steel).
Furthermore, after attaching a mast to each of the two wheel support members, the wheels may be attached to the two wheel support members. And after fixing two masts to a wheel support member and making it stand, a base material can also be attached to a wheel support member.

10: Stacker crane, 11: Article, 12: Carriage, 13: Traveling rail, 14: Wheel, 15: Lower frame, 16, 17: Wheel support member, 18: Wheel storage part, 19: Axle, 20: Pillow unit, 21, 22: Through hole, 23: Bolt, 25: Motor installation part, 26: Base material, 27: Drive motor, 28: Mast, 29: Wire rope, 30: Mast coupling part, 31, 32: Through hole, 33 : Screw member, 34, 35: Channel material, 36: Bottom plate portion, 37, 38: Side wall portion, 39: Reinforcing plate, 40, 41: Through hole, 42: Screw member, 43: Upper frame, 44: Wheel, 45 : Guide rail, 46: Control unit, 47: Stopper

Claims (3)

In a stacker crane comprising a lower frame, a wheel support member connected to the lower frame, to which a wheel is attached, and a mast to which a carriage is attached to be movable up and down,
The lower frame includes two channel steels arranged in parallel, and the wheel support member includes two mast connecting portions, each having the same size and shape, and the two grooves. are respectively fixed to one end and the other end portion of the shaped steel, said mast, two had been, is lower respectively fixed to the mast coupling portion of each wheel support member is erected state is maintained, the two wheels A base material, which is a metal plate, is attached to one of the support members in a replaceable state, and a drive motor for raising and lowering the carriage is fixed to only one of the two wheel support members via the base material. A stacker crane characterized by The stacker crane according to claim 1, wherein the wheel support member is a casting. The stacker crane according to claim 1 or 2, wherein the mast connecting portion is supported from below by the lower frame.

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