JPH05330789A - Driving device for overhead traveling crane - Google Patents

Abstract

PURPOSE:To provide a driving device for an overhead traveling crane of simple mechanism and easy operation, by which the overhead traveling crane can be safely and easily driven. CONSTITUTION:When a slide beam 14 is positioned in the lower region of a main beam 12, the main beam 12 is let travel by a main beam traveling device 19. The slide beam 14 is not collided with a strut at the time when the main beam 12 is traveling. The movement of the slide beam 14 is regulated by a slide beam moving device 38 until a hoist 16 is moved to one end part of the slide beam 14, and when the hoist 16 is moved to the one end part of the slide beam 14, the movement of the hoist 16 is stopped, and the slide beam 14 is started to be moved at the same time. Thus the traveling of the hoist 16 and the movement of the slide beam 14 do not need to be controlled respectively. A touch sensor 66 is provided on the hoist 16 so that an overhead traveling crane 10 is stopped when the hoist 16 collides with an obstacle, and the operational safety is thus achieved.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead crane drive device provided in an overhead crane having a hoisting, lowering and traversing function.

2. Description of the Related Art In a warehouse or the like, there is provided an overhead crane having a hoisting, hoisting and traversing function, and a three-dimensionally carrying a suspended load by a combination of these functions. In this overhead crane, a garter whose both ends are movably supported by a traveling device (motor, etc.) on a guide rail mounted orthogonally to the columns, a beam slidably supported on this garter, and this beam There is a hoist which moves up and a hoist (Japanese Patent Laid-Open No. 61-14 / 1986).
5098). In this overhead crane, the beam and the hoist are moved by the engagement between the sprocket and the chain. However, in such a drive transmission mechanism, the sprocket and the chain are meshed with each other to sequentially transmit power from the garter to the beam, and further from the beam to the hoist. Cannot be performed, which may cause inconvenience in the function of hanging loads. Therefore, in order to solve this inconvenience, it is possible to consider a mechanism in which a driving device for the beam and a traveling device for the hoist are respectively provided, and the beam independently slides on the garter and the hoist travels on the beam. However, if the mechanism is such that the beam slides on the garter independently and the hoist runs on the beam, it is necessary to control the driving of the beam and the hoist, which complicates the mechanism and operation. Further, in order to avoid a collision with a pillar or the like arranged in the warehouse, it is necessary to provide a collision sensor for each of the beam and the hoist, which makes control complicated.

SUMMARY OF THE INVENTION In consideration of the above facts, an object of the present invention is to provide a driving device for an overhead crane, which has a simple mechanism and operation and can drive the overhead crane safely and easily.

According to a first aspect of the present invention, there is provided a drive device for an overhead crane, comprising: a main beam that travels on a guide rail that is erected; and a slide beam that moves on the main beam in its axial direction. A drive device for an overhead crane that drives a hoist that travels on the slide beam, wherein a main beam travel device that travels the main beam when the slide beam is located in a lower region of the main beam, and the hoist is the slide. A slide beam moving device that regulates the movement of the slide beam until it moves to the end of the beam and moves the slide beam when the hoist moves to the end of the slide beam, and the slide beam is located in the lower region of the main beam. And a hoist traveling device for moving the hoist. It is a symptom. The drive device for an overhead crane according to claim 2, wherein the main beam traveling device is provided when the drive device is protruded from the outer periphery of the hoist and comes into contact with an obstacle.
It is characterized in that stop means for stopping the slide beam moving device and the hoist traveling device is provided.

The above-structured overhead crane driving device includes a main beam traveling device for traveling the main beam, a slide beam moving device for moving the slide beam, and a hoist traveling device for traveling the hoist. The main beam is driven by the main beam traveling device when the slide beam is located in the lower region of the main beam, that is, when the center of the slide beam coincides with the center of the main beam. Thus, when the main beam travels, the slide beams do not project from both ends of the main beam, so that it is possible to avoid a collision with the column. Further, the movement of the slide beam is limited by the slide beam moving device until the hoist moves to one end of the slide beam. Here, when the hoist moves to one end of the slide beam, the movement of the hoist is stopped, and at the same time, the slide beam starts moving. Therefore, it is not necessary to control the traveling of the hoist and the movement of the slide beam. Next, when moving the hoist from this state to the other end, first, the slide beam moving device moves the slide beam toward the other end. At this time, movement of the hoist is restricted by the hoist traveling device until the slide beam is positioned in the lower region of the main beam. Next, when the slide beam is positioned in the lower region of the main beam, the slide beam stops moving, and at the same time, the hoist moves on the slide beam toward the other end. In this way, the hoist is designed to run when the slide beam is located within the lower area of the main beam, and the movement of the hoist precedes the movement of the slide beam. Just install it. This stopping means
When the hoist collides with an obstacle, the touch sensor attached to the hoist is turned on by the collision pressure, and the power supply to the main beam traveling device, the slide beam moving device and the hoist traveling device is stopped.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an overhead crane 10 to which a drive system according to this embodiment is applied is a main beam 1
2. It is composed of a slide beam 14 and a hoist 16. The main beam 12 is made of H-shaped steel, and a pair of brackets 24 facing each other are provided upright on the upper flange portions 12A at both ends in the longitudinal direction. A main beam traveling device 19 is disposed on the bracket 24, and traveling wheels 26 rotatably supported by bearings (not shown) are driven by the motor 18. The traveling wheel 26 suspends the main beam 12 and travels on a guide rail 30 as a track arranged on a ceiling portion 28 (see FIG. 2).
A protrusion 17 is provided on the lower surface of the lower flange portion 12B of the main beam 12. As shown in FIG. 2, the motor 18 is driven by electric power supplied from a cable (not shown) connected to a lead wire 35 that slides with a trolley wire 34 installed over a plurality of columns 32. ing. As shown in FIG. 1, the main beam 12
The lower flange portion 12B is provided with a slide beam moving device 38 including a pair of rollers 36 that slidably suspends the lower surface of the upper flange portion 14A of the slide beam 14 made of H-shaped steel. The pair of rollers 36 are arranged so as to sandwich both surfaces of the web 14C of the slide beam 14, and are rotatably supported by a vertical plate 40 fixed to the main beam 12 via bearings (not shown). .. As shown in FIG. 6, a gear 44 surrounded by a frame 41 is coaxially fixed to the end portion of the shaft 42 on the right side of the roller 36. The gear 44 meshes with a gear 48 fixed to the rotation shaft of the motor 20 to which the vertical plate 40 is attached, and applies a rotational force to the roller 36 on the right side. As a result, the slide beam 14
While suspended by the four slide beam moving devices 38,
The main beam 12 slides in the axial direction (arrow A direction). As shown in FIG. 1, limit switches 39 and 41 are attached to both ends of the upper flange portion 14A of the slide beam 14. The movement loci of the limit switches 39 and 41 are determined by the vertical plate 40 of the slide beam moving device 38 arranged in the central portion.
Corresponding to the protrusions 70 and 72 provided on the.
Further, the movement locus of the limit switch 43 attached to the central portion of the upper flange portion 14A of the slide beam 14 is
It corresponds to the protrusion 17. As shown in FIG. 1, a hoist traveling device 78 including a pair of traveling wheels 26 traveling on the upper surface of the lower flange portion 14B is attached to the upper surface of the lower flange portion 14B of the slide beam 14. The pair of running wheels 26 are provided on the web 14C of the slide beam 14.
Are arranged so as to sandwich both sides thereof, and are pivotally supported on the upper end of the support plate 80 via bearings (not shown). A gear (not shown) is coaxially fixed to the end of the shaft 82 of the traveling wheel 76. This gear meshes with a gear (not shown) fixed to the rotation shaft of the motor 22 attached to the support plate 80, and applies a rotational force to the traveling wheel 76. This allows the hoist 16 fixed to the lower end of the support plate 80 to travel along the slide beam 14. Further, limit switches 58 and 60 are attached to both ends of the lower flange portion 14B of the slide beam 14. The limit switches 58 and 60 come into contact with the hoist traveling device 78 when the hoist 16 moves to both ends of the slide beam 14. As shown in FIGS. 1 and 7, the hoist 16 is mounted in a mounting hole 64 provided in the center of a rectangular frame 62. A touch sensor 66 is attached to the outer peripheral portion of the frame 62. In this touch sensor 66, as shown in FIG. 8, two electrodes 68 are covered with a waterproof elastic material (rubber as an example), and the electrodes 68 come into contact with each other when pressure is applied by collision with an obstacle or the like, It is supposed to turn on. The hoist 16 is of an electric type, and has a winding drum 92 around which a wire rope 90 having a hook 88 lifted is wound.
Is slowed down to wind up and lower the load. Here, the operation of the overhead crane 10 to which the drive device according to the present embodiment is applied will be described with reference to FIGS. 9, 10 and 11. In step 200, as shown in FIG. 9, it is determined whether or not the right traverse button 102 of the hoist 16 of the operation panel 100 connected to the control circuit 99 is turned on. In the state as shown in FIG. 2, the right traverse button 102
If is turned on, it is determined in step 202 whether the limit switch 60 is turned on. Next, when the limit switch 60 is off, it is determined in step 204 whether the limit switch 58 is turned on. If the limit switch 58 is off, the hoist 16 moves to the right in step 206 (see FIG. 3). In this way, the hoist 16 moves to the right ahead of the slide beam 14. Here, in step 202, the limit switch 6
If 0 is on, it is determined in step 208 whether the limit switch 43 (see FIG. 2) is on. When the limit switch 43 is off, that is, when the slide beam 14 projects to the left of the main beam 12, the slide beam 14 moves to the right in step 210 (see FIG. 4). Next, at step 212, it is judged if the limit switch 41 is turned on. If the limit switch 41 is off, it is determined in step 214 whether the right traverse button 102 is on. When the right traverse button 102 is on, it is determined in step 216 whether the touch sensor 66 is turned on. If the touch sensor 66 hits an obstacle and is turned on, the overhead crane 10 stops right traverse in step 217. Since the touch sensor 66 projects in the horizontal direction from the lower region of the overhead crane 10, it is possible to prevent each part of the overhead crane 10 from colliding with an obstacle. In step 218, it is determined whether the left traverse button 104 has been turned on. If the left traverse button 104 is not turned on, the determination is repeated, and if the left traverse button 104 is turned on,
Then, the hoist 16 or the slide beam 14 is moved to the left. If the limit switch 41 is turned on in step 212, the slide beam 14 stops right traverse in step 213 (see FIG. 4). Step two
If the right traverse button 102 is off at 14, the hoist traveling device 78 and the slide beam moving device 38 are stopped. If it is determined in step 200 that the right traverse button 102 is off, in step 220, the operation panel 1 shown in FIG.
It is determined whether the left traverse button 104 of the 00 hoist 16 is turned on. If the left traverse button 104 has been turned on, it is determined in step 222 whether the limit switch 58 (see FIG. 1) has been turned on. Next, when the limit switch 58 is off, it is determined in step 224 whether the limit switch 60 is turned on. If the limit switch 60 is off, the hoist 16 moves to the left in step 226. Here, if the limit switch 58 is on in step 222, in step 228,
It is determined whether the limit switch 43 is turned on.
If the limit switch 43 is off, step 230
Then, the slide beam 14 moves to the left. Next, at step 232, it is judged if the limit switch 39 is turned on. If the limit switch 39 is off, it is determined in step 234 whether the left traverse button 104 is on. When the left traverse button 104 (see FIG. 9) is on, it is determined in step 236 whether the touch sensor 66 has been turned on. If the touch sensor 66 hits an obstacle and is turned on, the overhead crane 10 stops left traversing in step 237. In step 238, it is determined whether the right traverse button 102 has been turned on. If the right traverse button 102 is not turned on, repeat the determination,
When the right traverse button 102 is turned on, the process moves to and the hoist 16 or the slide beam 14 is moved to the right.
When the limit switch 39 is turned on in step 232, the slide beam 14 stops left traverse in step 233. In step 234, if the left traverse button 104 is off, the hoist traveling device 78 and the slide beam moving device 38 are stopped. When it is determined in step 220 that the left traverse button 104 is off, it is determined in step 240 whether the limit switch 43 is on, as shown in FIG. When the limit switch 43 is on, that is, the slide beam 14 is the main beam 1
If it is located in the lower region of 2 (FIG. 2 or 5), it is determined in step 242 whether or not the eastward button 106 has been turned on. If the eastbound button 106 is on, step 2
At 44, the main beam 12 moves east. At this time, since the slide beam 14 is located in the lower region of the main beam 12, it does not collide with the support column 32. Next, in step 246, it is determined whether or not the eastbound button 106 has been turned off. If the eastbound button 106 is on, it is determined in step 248 whether the touch sensor 66 has been turned on. If the touch sensor 66 hits an obstacle and is turned on, at step 249, the overhead crane 1
0 stops eastbound. In step 250, West button 1
It is determined whether 08 is turned on. West button 108
If is not turned on, repeat the judgment, West button 1
If 08 is turned on, the flow shifts to and the main beam 12 is moved westward. If the eastbound button 106 is off in step 242, it is determined in step 252 whether or not the westbound button 108 has been turned on. If the westbound button 108 is on, then in step 254, the main beam 12 moves westward. At this time, since the slide beam 14 is located in the lower region of the main beam 12, it does not collide with the support column 32. Next, in step 256, it is determined whether or not the westward button 108 has been turned off. West button 10
If 8 is on, touch sensor 6
It is determined whether 6 is turned on. Touch sensor 66
If is hit by an obstacle and turned on, the overhead crane 10 stops westward at step 259. In step 260,
It is determined whether or not the eastbound button 106 has been turned on. If the eastbound button 106 is not turned on, repeat the judgment,
If the eastward button 106 is turned on, the flow shifts to and the main beam 12 is moved eastward. The hoist 16 winds up and lowers the load except when it hits an obstacle and stops at the touch sensor 66. This hoist 1
6 is driven by the hoist button 1 of the operation panel 100 shown in FIG.
10. The lowering button 112 is operated. in this way,
Since the hoist 16 and the slide beam 14 are driven only by the right traverse button 102 and the left traverse button 104,
The operation of the overhead crane is easy. Further, since the hoist 16 always moves ahead of the movement of the slide beam 14, the collision-preventing touch sensor 66 only needs to be attached to the hoist 16.

As described above, since the operation of the drive system for an overhead crane according to the present invention is mechanically controlled, the mechanism and operation are simple, and the drive of the overhead crane is safe and easy. Can be done to.

[Brief description of drawings]

FIG. 1 is a perspective view of an overhead crane to which a drive device for an overhead crane according to the present invention is applied.

FIG. 2 is a side view showing an operating state of an overhead crane to which an overhead crane driving device according to the present invention is applied.

FIG. 3 is a side view showing an operating state of an overhead crane to which an overhead crane driving device according to the present invention is applied.

FIG. 4 is a side view showing an operating state of an overhead crane to which an overhead crane driving device according to the present invention is applied.

FIG. 5 is a side view showing an operating state of an overhead crane to which an overhead crane driving device according to the present invention is applied.

FIG. 6 is an exploded perspective view of a slide beam moving device for an overhead crane according to the present invention.

FIG. 7 is a perspective view showing a state in which the touch sensor is attached to the hoist of the overhead crane according to the present invention.

8 is a sectional view taken along line 8-8 of FIG.

FIG. 9 is a block diagram showing a method for controlling a drive device for an overhead crane according to the present invention.

FIG. 10 is a flowchart showing an operating state of the overhead crane according to the present invention.

FIG. 11 is a flowchart showing an operating state of the overhead crane according to the present invention.

[Explanation of symbols]

 19 Main Beam Traveling Device 38 Slide Beam Moving Device 66 Touch Sensor (Stopping Unit) 78 Hoist Traveling Device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsushi Uchimura 8-21-1, Ginza, Chuo-ku, Tokyo Stock company Takenaka Corporation Tokyo Main Store (72) Inventor Yoshio Nakajima 8-21, Ginza, Chuo-ku, Tokyo No. 1 Incorporated Takenaka Corporation Tokyo Main Store (72) Inventor Kiyoshi Amami 2-5-14 Minamisuna, Koto-ku, Tokyo Incorporated Takenaka Corporation Technical Research Institute (72) Inventor Minoru Ochiai Ginza, Chuo-ku, Tokyo 8-21-1, Takenaka Corporation Tokyo Main Store (72) Inventor Kenji Okuda 8-21-1, Ginza, Chuo-ku, Tokyo Stockholder Takenaka Corporation Tokyo Main Store (72) Inventor Kawamura Tsuneo Tokyo 8-21-1 Ginza, Chuo-ku, Tokyo Takenaka Corporation Tokyo Main Store (72) Inventor Jiro Ishii 8-21-1, Ginza, Chuo-ku, Tokyo Takenaka Corporation East (72) Inventor Motoyuki Sata 8-21-1, Ginza, Chuo-ku, Tokyo Stock company Takenaka Corporation Tokyo Main store (72) Inventor Hiroshi Yoshikawa 8-2-1 Ginza, Chuo-ku, Tokyo Stock association Takenaka Corporation Tokyo Main Store

Claims (2)

[Claims] 1. A drive of an overhead crane for driving a main beam traveling on a erected guide rail, a slide beam moving on the main beam in an axial direction thereof, and a hoist traveling on the slide beam. In the device, a main beam traveling device that travels the main beam when the slide beam is located in the lower region of the main beam, and a hoist that regulates the movement of the slide beam until the hoist moves to the end of the slide beam. A slide beam moving device that moves the slide beam when the slide beam moves to an end of the slide beam; and a hoist traveling device that moves the hoist when the slide beam is located in a lower region of the main beam. Drive device for an overhead crane. 2. The stopping means for stopping the main beam traveling device, the slide beam moving device and the hoist traveling device when the hoist traveling device comes into contact with an obstacle which is provided on the outer periphery of the hoist. The drive device for the overhead crane described in.