JPH0455203A - Stacker crane - Google Patents

Abstract

PURPOSE:To make a shelf compact by providing an elevator base with drawers for drawing a pallet in and out, and positioning the drawers below the placing faces of load placing means at the time of the elevator base being lowered down to the lower frame. CONSTITUTION:A pair of rails 16, 16 of U-shape cross section is provided at the right and left part of the upper face of an elevator base 15, and drawer parts 20, 20 for hooking a pallet 60 to draw it in and out are disposed thereon in the freely advancing/retreating state. This drawer part 20 is formed of a drawer body 21 and a drawer body advancing/retreating means 25. On the other hand, load placing means 30 driven by chains 32 are disposed on a lower frame 4, and the load placing faces 30a are formed thereon. When the elevator base 15 is lowered down to the lower frame 4, the upper face part 15a of the elevator base 15 is positioned below the placing faces 30a so as to place the drawer parts 20 in the lower level than the placing faces 30a. With this constitution, a slide fork becomes unnecessary, and a shelf can be made compact.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a stacker crane.

In particular, the present invention relates to a stacker crane that can make the shelves for storing pallets more compact.

(Conventional technology) Figure 14 shows a general stacker crane.

In the figure, 1 is a traveling rail, 2 is a guide rail, and 3 is a running rail.
is a traveling aircraft that travels along these traveling rails 1 and guide rails 2.

The traveling body 3 includes a lower frame 4 that travels on a traveling rail 1, a front mast 5 and a rear mast 6 that are erected on the lower frame 4, and a plate 7 attached to the upper part of these masts 5.6 by welding or the like. an upper frame 8 which is fixed and moves along a guide rail 2; and both masts 5, 6.
It is equipped with an elevating platform 9 that ascends and descends along the vertical axis.

10 is a traveling device mounted on the lower frame 4, 11 is a lifting device, and 12 is a control device.

The lifting device 11 has a winding mechanism for two chains 13 and 14 whose tips are connected to the lifting frame 9. By winding or feeding out the chains 13 and 14 by this winding mechanism, the lifting frame 9 is raised and lowered. It is supposed to be done.

Of the two chains, one chain 13 is guided by an idler 8b rotatably provided on the upper frame 8 with a shaft 8a, and the other chain 14
is guided by the idler 8b and an idler 8c provided similarly.

Such a stacker crane travels along the traveling rail 1 and the guide rail 2, raises and lowers the lifting frame 9,
The slide fork 9a is used to load and unload cargo and transport the cargo on shelves in a warehouse or the like.

(Problems to be Solved by the Invention) The conventional stacker crane described above has the following problems.

Loading and unloading of cargo stored on shelves in warehouses and the like was accomplished using slide forks provided on lifting platforms. As a result, it was necessary to provide a space on the shelf for inserting a slide fork. This increases the height of the shelf,
There was a problem with the crane becoming larger.

The purpose of the present invention is to solve the above-mentioned conventional problems,
To provide a stacker crane capable of loading and unloading loads without using a slide fork and making shelves more compact.

(Means for Solving the Problem) In order to achieve the above object, the present invention includes a pair of left and right masts, a lifting platform that goes up and down along these masts, and a load loading means provided on the lower frame of the mast. A stacker crane is provided with a drawer for hooking and taking out pallets on the lifting platform, and when the lifting platform is lowered onto the lower frame, the drawer is located below the loading surface of the load loading means. The structure is located at

(Operations and Effects) Since the present invention has the above-mentioned configuration, it has the following functions and effects.

That is, since the lifting platform is provided with a drawer, the pallet can be taken in and out by hooking the drawer to the pallet.

When loading and unloading pallets, when the lifting platform is lowered onto the lower frame, the drawer of the lifting platform is located below the loading surface of the loading means, so the pallet on the lifting platform that was hooked to the drawer is moved to the loading means. As the item is transferred to the top, the drawer is unlatched.

In this way, the pallet on the lifting platform can be transferred to the loading means of the lower frame by simply lowering the lifting platform onto the lower frame after pulling out the pallet onto the lifting platform. can go under the pallet and transfer the drawer to the opposite position, and when the lifting platform is raised again, the drawer changes from a pull-out action to a push-in action and can transport the pallet to a shelf, station, etc.

As described above, according to the present invention, pallets can be taken in and out without using sliding forks (pallets can be taken in and out), and by eliminating the space for inserting sliding forks, each stage of the shelf can be placed close to each other, and the shelf can be made compact. This has the effect of making it possible to improve the

(Example) The illustrated embodiment will be described below.

Fig. 1 is a front view of a stacker crane according to the present invention, Fig. 2 is a front view of a stacker crane according to the present invention;
The figure is a left side view, FIG. 3 is a plan view, FIG. 4 is an enlarged vertical sectional view of the platform showing a part of the drawer of the platform, and FIG.
The figure is a sectional view taken along the line A--A in FIG. 4.

In these drawings, parts corresponding to those shown in FIG. 14 are designated by the same reference numerals.

The stacker crane of this example uses Freon! - A lifting platform 15 that moves up and down along the mast 5 and rear mast 6, and a pair of drawer parts 2 provided on the left and right sides of the upper surface of this lifting platform 15.
0°20 and the load loading means 30 provided on the lower frame 4
It is equipped with

Further, as shown in FIG. 9, the pallet 60 to be stored on the shelf 50 is provided with guide rollers 61 on both sides of the pallet 60, and hook portions 64, 64 are provided on the front part 62 and rear part 63 of the pallet 60, respectively. Use what is given to you. As shown in FIG. 10, the pallet 60 is supported and stored by guide rails 51 provided on the shelf 50, and can be taken in and out of the shelf 50 by rotation of the guide roller 61. It has become.

As shown in FIGS. 4 and 5, on the left and right sides of the upper surface of the lifting platform 15,
A pair of rails 16.16 having a U-shaped cross section are provided. Drawer part 20.20 these rails 16.16
It is designed to move forward and backward on the lifting platform 15 while being guided by.

Free rollers 17 for receiving and guiding the pallet 60 are rotatably arranged inside both ends of the rails 16,16.

The drawer part 20 includes a drawer main body 21 and an advancing/retracting means 25 for moving the drawer main body 21 forward and backward.

At the front and back of the upper part of the drawer main body 21, there are claws 2 that protrude upward.
2.22 is provided. This claw 22.22 is formed in a shape that can be engaged with a hook portion 64.64 of the pallet 60.

A lifting platform 1 is provided at the front and rear of the inner side 21a of the drawer main body 21.
The drawer main body 2 is engaged with the groove 16a of the rail 16 of No.
1 is rotatably provided.

Furthermore, chain latches 24 and 24 are provided at the front and rear of the outer portion 21b of the drawer main body 21.

As shown in FIG.
6, a transmission 26a connected to the drive motor 26, a drive sprocket 27 attached to the output shaft of the transmission 26a, a chain 28 rotated by the drive sprocket 27, a driven sprocket 27a supporting the chain 28, It consists of 27b. Note that 29 is an adjustment unit that can adjust the slack of the chain 28, etc.

28a is a chain guide that supports the chain 28 upward. The chain latch 24 of the drawer main body 21 described above is engaged with the chain 28 supported by the chain guide 28a.

As a result, when the drive motor 26 of the advancing/retracting means 25 is operated, the chain 28 is rotated by the transmission 26a and the driving sprocket 27, and the drawer main body 21 moves forward and backward in the direction of arrow X in FIG. 4 according to the rotation direction. It looks like this.

The forward and backward movement of the drawer main body 21 by the operation of the drive motor 26 is performed by the control device 12 as well as the lifting and lowering control of the lifting platform 15.

As shown in FIG. 1.3, the load loading means 30 are provided in pairs on the left and right sides of the lower frame 4, and include a drive motor 31 and a chain 32.3 rotated by the drive morph 31.
2 and sprockets 33.33 that drive these chains 32.32.

The load loading means 30 having such a configuration is configured such that when the lifting platform 15 is lowered to the lower frame 4, the loading surface 30a of the loading platform 30 is located above the upper surface portion 15a of the lifting platform 15. As a result, the drawer portion 20 of the lifting platform 15 is located below the loading surface 30a of the load loading means 30.

Next, the operation of the stacker crane constructed as described above will be explained.

FIG. 11 is an explanatory diagram when the pallet 60 pulled out from the shelf 50 onto the lifting platform 15 is transferred to the station S etc. by the loading means 30. In this case, the loading means 3
At the end of 0, as shown in FIGS. 11(g) and (h),
A vertically movable pallet locking portion 7 that locks the pallet 60
Set it to 0. Pallet 6 from shelf 50 to lifting platform 15
To draw 0, proceed as follows. In addition, the first
1 (a) to (j) correspond to the following symbols (a) to (j).

(a) The lifting platform 15 is moved up and down to the rack where the pallet 60 is stored. Then, the claw 22 of the drawer main body 21 of the lifting platform 15 is connected to the hook portion 6 of the pallet 60.
4, the lifting platform 15 is stopped.

(b) Then, the drawer main body 21 is moved toward the shelf 50 by the advancing/retracting means 25 of the lifting platform 15.

(c) After that, move the lifting platform 15 up a little and
The claw 22 of the drawer main body 21 is engaged with the hook portion 64 of the pallet 60.

(d) The drawer main body 21 is moved to the shelf 5 by the advancing/retracting means 25.
Move in the opposite direction from 0.

(e) As a result, the pallet 60 is pulled out from the rack of the shelf 50 and supported on the free roller 17 of the lifting platform 15 while being engaged with the claw 22 of the drawer main body 21.

(f) The lifting platform 15 supporting the pallet 60 is lowered onto the lower frame 4. As a result, the pallet 60 supported by the lifting platform 15 is moved to the loading means 3 of the lower frame 4.
Passed to 0. At the same time, the drawer body 21 becomes lower than the loading surface 30a of the load loading means 30, and the claws 22 of the drawer body 21 and the hook portions 64 of the pallet 60 are disengaged.

(g) Thereafter, the drive motor 31 of the loading means 30 is driven to rotate the chain 32, and the pallet 60 is moved to the station S side. At the same time, the drawer main body 21 is moved toward the shelf 50 by the forward/backward moving means 25 of the lifting platform 15.

(h) The pallet 60 that has moved to the station S side is positioned by coming into contact with the pallet locking portion 70 of the loading means 30. The drawer main body 21 is connected to the claw 2 of the drawer main body 21.
2 is located below the hook part 64 of the rear part 63 of the pallet 60 and stops.

(i) Next, when the lifting platform 15 is slightly raised, the claw 22 of the drawer main body 21 engages with the hook portion 64 of the pallet 60.

(J) Then, the drawer main body 2
1 to the station S side. As a result, the pallet 60 is moved to the station S side and stored in the rack.

The pallet 6 pulled out from the shelf 50 as described above
0 is transferred to the station S via the loading means 30 after passing through the lifting platform 15.

Next, the transfer of the pallet 60 from the station S to the shelf 50 will be explained. Note that (k) to (r) in FIG. 11 correspond to the following symbols (k) to (r).

(k) First, the lifting platform 15 is lowered onto the lower frame 4, and then the drawer main body 21 is moved by the advancing/retracting means 25.
Move to the station S side.

(1) Next, when the lifting platform 15 is slightly raised, the claw 22 of the drawer main body 21 engages with the hook portion 64 of the pallet 60.

(m) Then, the drawer main body 2
1 to the shelf 50 side. As a result, pallet 60
is pulled out from the station S and supported on the free roller 17 of the lifting table 15 while being engaged with the pawl 22 of the drawer main body 21.

(n) The lifting platform 15 supporting the pallet 60 is lowered onto the lower frame 4. As a result, the pallet 60 supported by the lifting platform 15 is moved to the loading means 3 of the lower frame 4.
Passed to 0. At the same time, the drawer body 21 becomes lower than the loading surface 30a of the load loading means 30, and the claws 22 of the drawer body 21 and the hook portions 64 of the pallet 60 are disengaged.

(o) After that, the drive motor 31 of the loading means 30 is driven to rotate the chain 32, and the pallet 6 is placed on the shelf 50 side.
Move 0. At the same time, the drawer main body 21 is moved to the station S side by the forward/backward moving means 25 of the lifting platform 15.

(p) The pallet 60 that has moved toward the shelf 50 comes into contact with the pallet locking portion 70 of the load placement means 30 and stops. In this state, the claw 22 of the drawer main body 21 that has moved toward the station S is positioned below the hook portion 64 of the front portion 62 of the pallet 60. (q) Next, when the lifting platform 15 is slightly raised, the claw 22 of the drawer main body 21 touches the pallet 6.
It engages with the hook portion 64 of 0. Thereafter, the lifting platform 15 is raised to a predetermined shelf position. (r) Then, the drawer main body 21 is moved toward the shelf 50 by the advancing/retracting means 25. As a result, the pallet 60 is moved to the shelf 50 side and stored in the rack. Thereafter, the lifting table 15 is lowered a little to release the engagement between the claw 22 of the drawer main body 21 and the hook part 64 of the pallet 60. And the advance/retreat movement means 25
, the drawer main body 21 is moved in the direction opposite to the shelf 50.

As described above, the pallet 60 ejected from the station S passes through the lifting platform 15 and is then transferred to the shelf 50 via the loading means 30.

FIG. 12 is an explanatory view showing how a pallet 60 is taken in and out between a crane and a shelf 50 provided on one side of the crane.

The operation of pulling out the pallet 60 from the shelf 50 to the lifting platform 15 is as shown in FIGS. 11(a) to 11(e).
Since this is carried out in the same manner as in (a) to (e) of FIG. 1, the explanation thereof will be omitted, and the subsequent operation will be explained.

In addition, in FIG. 12 (f) to (h), the following symbols (f) to
Corresponds to (h).

(f) The lifting platform 15 is moved up and down to a vacant rack, and the drawer main body 21 is moved up and down the shelf 50 by the advancing/retracting means 25.
Move it in the direction of. As a result, the pallet 60 engaged with the claws 22 of the drawer main body 21 moves toward the shelf 50, and the pallet 60 is stored in the rack.

(g) After that, the lifting table 15 is lowered a little to release the engagement between the claw 22 of the drawer main body 21 and the hook part 64 of the pallet 60.

(h) Then, the drawer main body 2
1 in the direction opposite to the shelf 50.

In the manner described above, the pallet 60 can be taken in and out between the crane and the shelf 50 provided on one side of the crane.

FIG. 13 is an explanatory diagram in the case where shelves 50 and 51 are arranged on both sides of the crane and a pallet 60 is transferred from the shelf 50 to the shelf 51 via the lifting platform 15. In addition,
The lifting platform 15 is provided with a pallet locking portion 70 that is movable up and down, similar to that shown in FIGS. 11(g) and 11(h).

The operation of pushing out the pallet 60 from the shelf 50 to the lifting platform 15 and the operation of storing the pallet 60 from the lifting platform 15 to the shelf 51 are shown in (a) to (e) in FIG. 11 and (f) to (h) in FIG. 12. Since this is carried out in the same manner as shown in , the explanation thereof will be omitted. In addition, in FIGS. 13(a) to (d), the following symbols (a)
) to (d).

(a) After pulling out the pallet 60 from the shelf 50, the lifting platform 15 supporting the pallet 60 is lowered onto the lower frame 4.

As a result, the pallet 60 supported by the lifting platform 15
is transferred to the loading means 30 of the lower frame 4. At the same time, the drawer body 21 becomes lower than the loading surface 30a of the load loading means 30, and the claws 22 of the drawer body 21 and the hook portions 64 of the pallet 60 are disengaged. Here, the pallet engaging portion 70 of the lifting platform 15 is moved upward in advance.

Then, the loading means 30 is activated to move the pallet 60 to the left. The stopping position of the pallet 60 is determined by a locking portion 70.

(b) Next, the drawer main body 21 is moved by the advancing/retracting means 25.
is moved in the direction of arrow X in the figure. At this time, pallet 60
is positioned as explained in (a), so
The drawer main body 21 stops when the claw 22 of the drawer main body 21 is located below the hook portion 64 of the rear part 63 of the pallet 60.

(c) After that, when the elevator platform 15 is raised, the claws 22 of the drawer main body 21 engage with the hook portions 64 of the pallet 60. Thereafter, the lifting platform 15 is moved to a predetermined step on the shelf 51, and the drawer main body 21 is moved to the shelf 51 by the advancing/retracting means 25.
Move to the side.

(d) After lowering the elevator platform 15 a little, the drawer main body 21 is returned to the elevator platform 15 side.

As described above, from the shelf 50 to the shelf 5 via the lifting platform 15
1 Hepared 60 is transferred.

As described above, according to this embodiment, the pallet 60 can be taken in and out without using a slide fork,
By eliminating the conventionally necessary space for inserting a slide fork, each stage of the shelf 50 can be brought closer to each other, and the entire shelf can be made more compact.

Furthermore, since the pallet 60 can be taken in and out of the lifting platform 15 not only on one side but on both sides, it is possible to provide shelves on both sides of the crane.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be modified as appropriate within the scope of the gist of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a front view of the stacker crane chain according to the present invention, Fig. 2 is a left side view, Fig. 3 is a plan view, and Fig. 4 is an enlarged longitudinal section of the elevating platform showing a portion of the drawer of the elevating platform. Top view, Figure 5 is a sectional view taken along line A-A in Figure 4, Figure 6 (a)
, (b) is a front view and a side view showing the structure of the drive part of the drawer, FIG. 7 is a sectional view taken along the line B-B in FIG. 5, and FIG.
9 is a perspective view of the pallet, 1st
Figure 0 is an enlarged view of the main parts when the pallet is supported on the shelf, Part 1
Figures 1 (a) to (r), Figures 12 (a) to (h), and Figures 13 (a) to (d) are explanatory diagrams of the operation of stacker cranes, and Figure 14 is a conventional general stacker crane. FIG. 3.4... Mast, 15... Lifting platform, 21... Drawer main body, 22... Claw, 25... Advance/retreat movement means, 30
...Loading means, 50...Shelf, 60...Pallet, S...Station.

Claims (1)

[Claims] A stacker crane comprising a pair of left and right masts, a lifting platform that moves up and down along these masts, and load loading means provided on the lower frame of the mast, wherein a drawer for hooking and taking out pallets is connected to the lifting platform. , wherein the drawer is located below the loading surface of the load loading means when the lifting platform is lowered onto the lower frame.