JP3078647B2 - Overhead crane drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for an overhead crane provided on an overhead crane having hoisting, lowering and traversing functions.

2. Description of the Related Art In a warehouse or the like, an overhead crane having hoisting, lowering, and traversing functions, and three-dimensionally transporting a suspended load by a combination of these functions is provided. This overhead crane has a gutter supported at both ends by a traveling device (such as a motor) on a guide rail mounted orthogonally to the column, a beam slidably supported on the gutter, and a beam And a hoist that moves upward (Japanese Patent Laid-Open No. 61-14 / 1986).
No. 5098). In this overhead crane, the beam and the hoist are moved by meshing a sprocket with a chain. However, in such a drive transmission mechanism, the power is sequentially transmitted from the garter to the beam and further from the beam to the hoist by the engagement of the sprocket and the chain, so that the beam or the hoist is moved alone. In some cases, causing a problem in the operation of the suspended load. Therefore, in order to solve this inconvenience, a mechanism in which a driving device is provided for the beam and a traveling device is provided for the hoist, respectively, and the beam slides on the garter alone and the hoist travels on the beam is also conceivable. However, if a mechanism in which the beam slides on the garter alone and the hoist travels on the beam is used, it is necessary to control both the driving of the beam and the hoist, which complicates the mechanism and operation. In addition, it is necessary to provide a collision sensor for each of the beam and the hoist in order to avoid a collision with a column or the like provided in the warehouse, which complicates the control.

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

According to a first aspect of the present invention, there is provided a driving apparatus for an overhead crane, comprising: a main beam traveling on an installed guide rail; a slide beam traveling on the main beam in an axial direction thereof; A hoist that travels on the slide beam; and a drive device of an overhead crane that drives the main beam traveling device that travels the main beam when the slide beam is located in a lower region of the main beam; 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 at times. It is a symptom. The driving device for an overhead crane according to claim 2, wherein the main beam traveling device projects from an outer periphery of the hoist and contacts an obstacle.
A stop means for stopping the slide beam moving device and the hoist traveling device is provided.

The overhead crane driving device having the above-mentioned structure 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 traveled by the main beam traveling device when the slide beam is located within 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 beam does not protrude from both ends of the main beam, so that it is possible to avoid collision with the support. 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 travel 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, the movement of the hoist is regulated by the hoist traveling device until the slide beam is located in a region below the main beam. Next, when the slide beam is located within the area below the main beam, the slide beam stops moving, and at the same time, the hoist moves on the slide beam toward the other end. As described above, the hoist is adapted to run when the slide beam is located in the lower region of the main beam, and the movement of the hoist is performed prior to the movement of the slide beam. It only needs to be installed. This stopping means
When the hoist collides with an obstacle, a touch sensor attached to the hoist is turned on by the collision pressure, and power supply to the main beam traveling device, the slide beam moving device, and the hoist traveling device is stopped.

As shown in FIG. 1, an overhead crane 10 to which a drive device according to the present embodiment is applied includes a main beam 1
2, a slide beam 14 and a hoist 16. The main beam 12 is made of an H-shaped steel, and a pair of brackets 24 facing each other are erected upward on 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, which are rotatably supported via bearings (not shown), are driven by the motor 18. The running wheel 26 suspends the main beam 12 and runs on a guide rail 30 as a track disposed on a ceiling 28 (see FIG. 2).
In addition, a projection 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 supplied with electric power from a cable (not shown) connected to a lead wire 35 that slides on a trolley wire 34 laid over a plurality of columns 32 and is driven. ing. As shown in FIG.
The lower flange portion 12B is provided with a slide beam moving device 38 including a pair of rollers 36 which 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 disposed so as to sandwich both surfaces of the web 14 </ b> C 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 an end of a 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 right roller 36. Thereby, the slide beam 14
While suspended by four slide beam moving devices 38,
The main beam 12 slides in the axial direction (the direction of arrow A). 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 locus of movement of the limit switches 39 and 41 is determined by the vertical plate 40 of the slide beam moving device 38 disposed at the center.
Respectively correspond to the projections 70 and 72 provided in.
The movement locus of the limit switch 43 attached to the center of the upper flange portion 14A of the slide beam 14 is as follows.
It corresponds to the projection 17. As shown in FIG. 1, a hoist traveling device 78 having 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 is formed by a web 14C of the slide beam 14.
And is supported by the upper end of the support plate 80 via a bearing (not shown). A gear (not shown) is coaxially fixed to an end of the shaft 82 of the traveling wheel 76. The gear meshes with a gear (not shown) fixed to a rotation shaft of the motor 22 attached to the support plate 80 to apply a rotational force to the traveling wheel 76. Thus, the hoist 16 fixed to the lower end of the support plate 80 can travel along the slide beam 14. 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 attached to an attachment hole 64 provided at the center of a frame 62 formed in a rectangular shape. A touch sensor 66 is attached to the outer periphery of the framework 62. In the touch sensor 66, as shown in FIG. 8, two electrodes 68 are covered with a waterproof elastic material (rubber as an example), and when pressure is applied by collision with an obstacle or the like, the electrodes 68 come into contact with each other, It is turned on. The hoist 16 is an electric type, and a winding drum 92 around which a wire rope 90 with a hook 88 lifted is wound.
Is rotated at a reduced speed to lift and lower the load. Here, an operation of the overhead crane 10 to which the driving 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 the right traverse button 102 of the hoist 16 of the operation panel 100 connected to the control circuit 99 has been turned on. In the state as shown in FIG.
Is turned on, it is determined in step 202 whether the limit switch 60 has been turned on. Next, if the limit switch 60 is off, it is determined in step 204 whether the limit switch 58 has been turned on. If the limit switch 58 is off, the hoist 16 moves rightward in step 206 (see FIG. 3). Thus, the hoist 16 moves rightward 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) has been turned on. When the limit switch 43 is off, that is, when the slide beam 14 extends 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 determined whether the limit switch 41 has been turned on. If the limit switch 41 is off, it is determined in step 214 whether the right traverse button 102 is on. If the right traverse button 102 is on, it is determined in step 216 whether the touch sensor 66 has been turned on. If the touch sensor 66 hits an obstacle and is turned on, at step 217, the overhead crane 10 stops moving to the right. In addition, since the touch sensor 66 protrudes in the horizontal direction from the lower area 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,
And 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 moving rightward in step 213 (see FIG. 4). Step 2
When the right traverse button 102 is off at 14, the hoist traveling device 78 and the slide beam moving device 38 stop. If it is determined in step 200 that the right traverse button 102 is off, then in step 220, the operation panel 1 shown in FIG.
It is determined whether the left traverse button 104 of the 00 hoist 16 has been 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, if the limit switch 58 is off, it is determined in step 224 whether the limit switch 60 has been turned on. If the limit switch 60 is off, in step 226, the hoist 16 moves to the left. Here, when the limit switch 58 is turned on in step 222, in step 228,
It is determined whether the limit switch 43 has been 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 determined whether or not the limit switch 39 has been turned on. If the limit switch 39 is off, it is determined in step 234 whether the left traverse button 104 is on. If the left traverse button 104 (see FIG. 9) is on, it is determined in step 236 whether or not the touch sensor 66 has been turned on. If the touch sensor 66 hits an obstacle and is turned on, at step 237, the overhead crane 10 stops moving left. 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,
If the right traverse button 102 is turned on, the process proceeds to and the hoist 16 or the slide beam 14 is moved to the right.
If the limit switch 39 is ON in step 232, the slide beam 14 stops moving leftward 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 stop. If 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 has been turned on, as shown in FIG. When the limit switch 43 is ON, that is, when the slide beam 14
2 (FIG. 2 or FIG. 5), it is determined in step 242 whether the east button 106 has been turned on. If the east 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 column 32. Next, in step 246, it is determined whether the east button 106 has been turned off. If the east 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, go west button 1
08 is turned on. Westbound button 108
If is not turned on, repeat the judgment, westing button 1
When 08 is turned on, the process proceeds to and the main beam 12 is moved west. If the easting button 106 is off at step 242, it is determined at step 252 whether the westing button 108 has been turned on. If the westing button 108 is on, the main beam 12 moves west in step 254. 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 column 32. Next, in step 256, it is determined whether the westbound button 108 has been turned off. Westbound button 10
If the touch sensor 6 is on, the touch sensor 6
It is determined whether or not 6 has been turned on. Touch sensor 66
Is turned on when hitting an obstacle, at step 259, the overhead crane 10 stops traveling west. At step 260,
It is determined whether the east button 106 has been turned on. If the Toko button 106 is not turned on, repeat the judgment,
When the easting button 106 is turned on, the process proceeds to and the main beam 12 is moved east. The lifting and lowering of the load by the hoist 16 is performed except when the load is stopped by the touch sensor 66 when hitting an obstacle. This hoist 1
6 is driven by the winding button 1 of the operation panel 100 shown in FIG.
10. Operated with the lower button 112. 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 simple. Further, since the hoist 16 always moves prior to the movement of the slide beam 14, it is sufficient to attach the touch sensor 66 for preventing collision to the hoist 16.

As described above, since the operation of the overhead crane driving device according to the present invention is mechanically controlled, the mechanism and operation are simplified, and the driving of the overhead crane is safe and easy. Can be performed.

[Brief description of the 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 operation state of the overhead crane to which the overhead crane driving device according to the present invention is applied.

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

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

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

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

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

FIG. 8 is a sectional view taken along line 8-8 in FIG. 7;

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

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

FIG. 11 is a flowchart showing an operation 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 (stop means) 78 Hoist traveling device

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Katsushi Uchimura 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Office (72) Yoshio Nakajima 8-21-1, Ginza, Chuo-ku, Tokyo No. Takenaka Corporation Tokyo Main Store (72) Inventor Kiyoshi Amami 2-5-1 Minamisuna, Koto-ku, Tokyo Inside Technical Research Institute Takenaka Corporation (72) Inventor Minoru Ochiai 8-21 Ginza, Chuo-ku, Tokyo No. 1 Takenaka Corporation Tokyo Main Store (72) Inventor Takeshi Okuda 8-21-1, Ginza, Chuo-ku, Tokyo In-house Takenaka Corporation Tokyo Main Store (72) Inventor Tateo Kawamura 8 Ginza, Chuo-ku, Tokyo 21-21, Takenaka Corporation, Tokyo Head Office (72) Inventor Jiro Ishii, 8-21-1, Ginza, Chuo-ku, Tokyo, Japan Takenaka Corporation Inside the Tokyo head office (72) Inventor Motoyuki Sata 8-21-1, Ginza, Chuo-ku, Tokyo Takenaka Corporation Inside the Tokyo head office (72) Inventor Hiroshi Yoshikawa 8-2-1-1, Ginza, Chuo-ku, Tokyo Stock company Takenaka Corporation Tokyo Main Store (56) References JP-A-61-295994 (JP, A) JP-A-4-45096 (JP, A) Jikai-sho 58-27281 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B66C 7 / 10,11 / 00 B66C 17 / 00,15 / 00

Claims (2)

(57) [Claims] A drive of an overhead crane for driving a main beam traveling on an installed guide rail, a slide beam traveling on the main beam in the axial direction, and a hoist traveling on the slide beam. In the apparatus, a main beam traveling device that travels the main beam when the slide beam is located in a lower region of the main beam, and a hoist that regulates movement of the slide beam until the hoist moves to an end of the slide beam. A slide beam moving device that moves the slide beam when moved to the 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, Overhead crane drive. 2. A stopping means is provided to project from the outer periphery of the hoist to stop the main beam traveling device, the slide beam moving device and the hoist traveling device when it comes into contact with an obstacle. 4. The driving device for an overhead crane according to 4.