JP3676186B2 - Stacker crane - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stacker crane for exchanging luggage between a storage shelf of a three-dimensional warehouse and a loading / unloading device, and in particular, the cable is shortened and the home position is reduced to facilitate maintenance and meet an explosion-proof guideline. It is what I did.
[0002]
[Prior art]
Conventionally, an example of a stacker crane is shown in FIGS. This has a crane body 4 that can move in the front-rear direction a, b along a pair of upper and lower guide rails (moving paths) 2, 3 arranged between the storage shelves 1 of a three-dimensional warehouse, A carriage 4a, a pair of front and rear masts 4b erected on the carriage 4a, a carriage 4c with a slide fork disposed so as to be movable up and down between the masts 4b, a carriage travel motor 4d provided at the rear of the carriage 4a, and A carriage raising / lowering motor 4e and an onboard control panel 4f provided at the front of the carriage 4a are connected to the onboard control panel 4f and the ground control panel 5 by a control signal cable 6 and a power cable 7. The cables 6 and 7 are passed around in a bundled state on the semicircular saddles 8a of a plurality of hangers 8 suspended to be movable on the upper guide rail 3.
[0003]
In the above-described configuration, the crane main body 4 is operated based on a predetermined program by the control signal and power supplied from the ground control panel 5 to the onboard control panel 4f via the both cables 6 and 7, whereby a carriage with a slide fork is provided. The cargo W is carried in and out between 4c and each storage shelf 1.
[0004]
The diameter r of the saddle 8a of each hanger 8 is set to be equal to or larger than a predetermined multiple of the diameter of each cable 6, 7 in order to smoothly bend each cable 6, 7, and is about 300 mm, for example. The storage space width L of the hanger 8 at the home position H of the crane body 4 is, for example, about 1500 mm. Furthermore, the lengths of the cables 6 and 7 are required to be about 1.7 times the moving length of the crane body 4 in the traveling direction. If the moving length is 20 m, for example,
34 m.
[0005]
[Problems to be solved by the invention]
In the above conventional configuration, since both cables 6 and 7 are long, they are expensive and electromagnetic noise is easily applied. In addition, a plurality of hangers 8 having a relatively complicated structure are required, and the storage space width L of the plurality of hangers 8 is large, so that the space of the home position H is increased by the increased amount. Furthermore, the maintenance of the cables 6 and 7 and the hangers 8 is a high-place work, which is dangerous and requires an inspection walkway, resulting in high production costs. Moreover, the cables 6 and 7 are bundled and hung on the saddle 8a. In this case, the power line of 100A at 200V and the control line need to be separated by 600 mm or more based on the factory electrical equipment explosion-proof guidelines by the Industrial Safety Institute of the Ministry of Labor. It is against the standard that there is.
[0006]
An object of the present invention is to provide a stacker crane in which a cable is shortened and a home position is miniaturized in view of the above-described conventional drawbacks, and maintenance is easy and it is adapted to an explosion-proof guide.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a crane main body capable of reciprocating along a movement path and a ground control panel are connected by a control signal cable and a power cable. In the stacker crane in which the crane body is operated based on a predetermined program by a control signal and power supplied through the cable, the both cables are arranged on the floor along the movement path, and the control signal cable And one end of the power cable rises in a substantially L shape and is connected to the front or rear part of the crane body, and the other end of each cable is provided at a location corresponding to the substantially central part of the moving path. It is characterized by being connected to .
[0008]
According to the above configuration, since the control signal cable and the power cable are arranged on the floor along the movement path of the crane body, the maintenance of both cables can be performed safely in a low place, and The cost of production is low because there is no need for an inspection corridor that is necessary in the case of office work.
[0009]
Further , according to the above configuration, the length of the control signal cable and the power cable need only be about 1.2 times the moving length of the crane body, and since it is short, it is inexpensive and electromagnetic noise is applied. There is an advantage that it is difficult.
[0010]
Further , according to the above configuration, when the crane body is moved to the home position, one end of the control signal cable and the power cable rises in a substantially L shape and does not protrude outward from the crane body. Space can be further reduced.
[0011]
According to a second aspect of the present invention, in the first aspect of the present invention, the crane body is provided with a guide body for bending one end of the control signal cable and the power cable with a predetermined radius of curvature. It is characterized by that.
[0012]
According to the above configuration, the control signal cable and the power cable can be bent in a substantially U shape by the guide body to smoothly follow the movement of the crane body.
[0013]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the control signal cable and the power cable are each detachably accommodated in a protective frame in the upper surface opening. It is a feature.
[0014]
According to the above configuration, the control signal cable and the power cable can be protected from a load drop accident or the like by the protective frame.
[0015]
A fourth aspect of the invention is characterized in that, in the invention according to any one of the first to third aspects, the control signal cable and the power cable are respectively housed in a flexible protective frame.
[0016]
According to the above configuration, the control signal cable and the power cable can be housed in the flexible protective frame and reliably protected.
[0017]
According to a fifth aspect of the present invention, in the fourth aspect of the invention, the flexible protective frame is formed by a number of plate-shaped covering materials that are rotatably connected to each other.
[0018]
According to the above configuration, a protective frame body having a length matching the lengths of the control signal cable and the power cable can be easily formed by simply connecting a predetermined number of plate-shaped covering materials to each other so as to be rotatable. Can do.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show a stacker crane according to an embodiment of the present invention. The protective frame 10 or 11 has a substantially U-shaped cross section on both sides of a lower guide rail 2 on a floor surface F. Are fixed at a predetermined distance t (600 mm or more) from each other, and the control signal cable 6 and the power cable 7 housed in the flexible protective frame body 9 are provided in the respective protective frames 10 and 11. The crane body 4 is arranged based on a predetermined program by a control signal and power supplied from the ground control panel 5 to the onboard control panel 4f via both cables 6 and 7, respectively. . Since the configuration other than the above is substantially the same as that of the conventional example shown in FIGS. 7 to 9, the same reference numerals are given to the same portions and the description thereof is omitted.
[0020]
According to the above configuration, since the cables 6 and 7 are disposed on the floor surface F, the maintenance of the cables 6 and 7 can be performed safely in a low place and is necessary for work in a high place. Since no inspection walkway is required, production costs are low. Further, the cables 6 and 7 can be protected from a fall accident of the luggage W by the protective frames 10 and 11.
[0021]
Furthermore, since the cables 6 and 7 are arranged in a state of being separated from each other by a predetermined distance t, the factory by the Ministry of Labor, Industrial Safety Research Institute says that the power line of 100A at 200V and the control line need to be separated by 600 mm or more Standards based on electrical equipment explosion-proof guidelines can be met.
[0022]
One end of each of the cables 6 and 7 bends upward in a substantially U shape and is connected to a pair of left and right arms 12 projecting sideways from the front side surfaces of the crane body 4 to the onboard control panel 4f. In addition to being connected, the other end of each of the cables 6 and 7 is connected to a connection point P on the floor surface F provided at a location corresponding to the substantially central portion of the lower guide rail 2, thereby connecting via the wiring 13. It is connected to the ground control panel 5.
[0023]
According to the above configuration, the cables 6 and 7 can be bent in a substantially U shape to smoothly follow the movement of the crane body 4. Moreover, the length of each cable 6 and 7 should just be about 1.2 times the moving length D of the crane main body 4 (refer FIG. 4), when the moving length D is 20 m, it will be 24 m, and it is short. Therefore, there is an advantage that it is inexpensive and electromagnetic noise is difficult to travel. Further, as shown by a solid line in FIG. 1, when the crane body 4 is moved to the home position H, one ends of the cables 6 and 7 protrude forward from the crane body 4 by a slight distance β (for example, about 400 mm). As a result, the space at the home position H can be made smaller than before.
[0024]
As shown in FIG. 3, the protective frame body 9 is formed by a large number of synthetic resin plate-like covering materials 9a that are rotatably connected to each other, and can reliably protect the cables 6 and 7. At the same time, the protective frame body 9 having a length corresponding to the length of each of the cables 6 and 7 can be easily formed simply by connecting the predetermined number of plate-like covering materials 9a so as to be rotatable.
[0025]
FIGS. 5 and 6 show a stacker crane according to another embodiment of the present invention. One end of the control signal cable 6 and the power cable 7 rises in a substantially L shape, and the onboard control panel 4f. Arc-shaped guide bodies 15 are provided on both side surfaces of the onboard control panel 4f so as to bend one end of each of the cables 6, 7 with a predetermined radius of curvature. Since the configuration other than the above is substantially the same as that of the embodiment shown in FIGS. 1 to 4, the same parts are denoted by the same reference numerals and the description thereof is omitted.
[0026]
According to the above configuration, substantially the same effect as that of the embodiment shown in FIGS. 1 to 4 can be obtained, and in particular, the crane body 4 is moved to the home position H as shown by the solid line in FIG. Sometimes, one end of each cable 6, 7 is held at a position spaced a predetermined distance α inward from the crane body 4 and does not protrude forward from the crane body 4, thereby further reducing the space at the home position H. can do. In addition, the cables 6 and 7 can be bent in a substantially U shape by the guide body 15 to smoothly follow the movement of the crane body 4.
[0027]
【The invention's effect】
According to the first aspect of the invention, since the control signal cable and the power cable are arranged on the floor along the movement path of the crane body, the maintenance of both cables can be performed safely in a low place. In addition, the inspection cost required for high-altitude work is not required, so the production cost is low.
[0028]
In addition , according to the invention of claim 1, the length of the control signal cable and the power cable need only be about 1.2 times the moving length of the crane body, and since it is short, it is inexpensive, There is an advantage that electromagnetic noise is hard to be applied.
[0029]
According to the first aspect of the present invention, when the crane body is moved to the home position, one end of the control signal cable and the power cable rises in a substantially L shape and does not protrude outward from the crane body. The home position space can be further reduced.
[0030]
According to the second aspect of the present invention, the control signal cable and the power cable can be bent in a substantially U shape by the guide body to smoothly follow the movement of the crane body.
[0031]
According to the third aspect of the present invention, the control signal cable and the power cable can be protected from the accident of dropping the luggage by the protective frame.
[0032]
According to the fourth aspect of the present invention, the control signal cable and the power cable can be housed in the flexible protective frame and reliably protected.
[0033]
According to the fifth aspect of the present invention, a protective frame having a length that matches the lengths of the control signal cable and the power cable can be easily obtained by simply connecting a predetermined number of plate-like covering materials so as to be rotatable. Can be formed.
[Brief description of the drawings]
FIG. 1 is a side view of a stacker crane according to an embodiment of the present invention.
FIG. 2 is a front view of the same.
FIG. 3 is a perspective view of the main part.
FIG. 4 is a schematic perspective view of the same.
FIG. 5 is a side view of a stacker crane according to another embodiment of the present invention.
FIG. 6 is a perspective view of the main part.
FIG. 7 is a side view showing a conventional example.
FIG. 8 is a front view of the same.
FIG. 9 is a perspective view of the main part.
[Explanation of symbols]
2 Lower guide rail (movement path)
4 Crane body 4f On-board control panel 5 Ground control panel 6 Control signal cable 7 Power cable 10 Protective frame 11 Protective frame 12 Arm 15 Guide body t Distance between both cables F Floor surface P Connection point

Claims (5)

A crane body capable of reciprocating along a movement path and a ground control panel are connected by a control signal cable and a power cable, and the crane body is predetermined by a control signal and power supplied via both cables. In the stacker crane that is operated based on the program, the two cables are arranged on the floor along the movement path, and one end of the control signal cable and the power cable rises in a substantially L shape. A stacker crane, wherein the stacker crane is connected to a front portion or a rear portion of a main body, and the other end of each cable is connected to a connection point provided at a position corresponding to a substantially central portion of the moving path . The stacker crane according to claim 1 , wherein a guide body for bending one end of the control signal cable and the power cable with a predetermined radius of curvature is provided on the crane body. 3. The stacker crane according to claim 1, wherein the control signal cable and the power cable are accommodated in a protective frame having an opening on the upper surface, respectively. The stacker crane according to any one of claims 1 to 3 , wherein the control signal cable and the power cable are each housed in a flexible protective frame. The stacker crane according to claim 4, wherein the flexible protective frame is formed of a number of plate-like covering materials that are rotatably connected to each other.

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