JPH0977474A - Overhead traveler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To widen the positioning allowable width of a work by shifting a hand of an overhead traveler at a right angle to a rail, and making it free of rotation. SOLUTION: A shaft 92 is rotated by a motor 70 and a pulley 74 installed in a body 8, and a hoisting unit is horizontally shifted to the body 8 with a ball screw 76 combined in this shaft 92. In addition, the motor is built in a hand, having it rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead traveling vehicle for conveying works, and more particularly to loading works from a position apart from directly under a traveling rail and unloading works to a position apart from just below a traveling rail. Regarding what to do.

[0002]

2. Description of the Related Art Overhead traveling vehicles are used for transporting goods and products (work) in factories. The overhead traveling vehicle travels along rails laid along the ceiling of the building, and the hand is hoisted or unwound by the hoisting unit provided in the main body, and, for example, the workpieces to be transported are loaded from the ground station and loaded. Load and unload work on other ground stations.

However, the position where loading or unloading is possible is limited to just below the traveling rail, and the arrangement of the traveling rail and the arrangement of the ground stations and the like are limited.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to 1) widen an allowable width of a work position with respect to a traveling rail,
Work can be loaded and unloaded even at a position other than directly below the traveling rail (claims 1 to 3), 2) eliminating restrictions on the orientation of the workpiece (claim 2), 3) from the traveling rail. It is to provide a simple and reliable mechanism for loading or unloading workpieces in an off position (claim 3).

[0005]

According to the present invention, there is provided a ceiling provided with a main body supported by a traveling rail laid along the ceiling of a building for traveling, a hoisting unit provided at a lower portion of the main body, and a hand which is raised and lowered by the hoisting unit. In the traveling vehicle, a feed mechanism for suspending the winding unit and moving the winding unit along the horizontal moving rail is provided on the horizontal moving rail arranged at the bottom of the main body at a substantially right angle to the moving direction of the main body. It is characterized by that.

[0006] Preferably, the hand is provided with a hand body, a rotating plate, and a rotating mechanism for rotating the rotating plate with respect to the hand body, and the hand body is suspended by a winding unit. In addition, a gripping mechanism for gripping the article to be conveyed is provided on the rotating plate (claim 2).

Further preferably, the feed mechanism includes a lateral movement motor, a shaft with a screw rotated by the motor,
And a female screw meshed with the threaded shaft (claim 3).

[0008]

According to the present invention, the hoisting unit is suspended by the laterally moving rail at the bottom of the main body and laterally moved along the bottom surface of the main body by the feeding mechanism (claim 1). Therefore, the hoisting unit can be moved in a direction perpendicular to the traveling rail, and can be loaded at a position other than immediately below the traveling rail. Here, as the feeding mechanism, for example, as in claim 3, a shaft with a screw and a female screw are used, and the shaft is rotated by a lateral movement motor, and the female screw is moved back and forth accordingly to move the winding unit. As the female screw, in addition to the ball screw shown in the embodiment, a simple female screw or the like can be used. In this way, the winding unit can be laterally moved by a simple and reliable mechanism of the screw, the shaft and the motor (claim 3). In this specification, the movement in the direction perpendicular to the moving direction of the overhead traveling vehicle, that is, the direction perpendicular to the traveling rail is called lateral movement.

Further, according to the present invention, the hand is composed of two parts, the hand body and the rotating plate, the hand body is hung by a rope or the like from the winding unit, the rotating plate is rotated, and the gripping mechanism is used. Hold the work. Therefore, the hand body can be stably hung without rotating with respect to the winding unit, and the rotating plate rotates according to the work, and the work is gripped by the gripping mechanism. Therefore, the work in any direction can be gripped by the hand, and the hand body does not rotate, so that the hoisting unit can easily move up and down (claim 2).

[0010]

1 to 14 show an overhead traveling vehicle according to an embodiment.
First, the overall structure of the overhead traveling vehicle and the structure of the bogie will be described. FIG.
4 shows the overall structure of the overhead traveling vehicle 2, 01 is a rail laid along the ceiling of a building such as a clean room or factory, 02 is a rail portion, and 03 is a communication cable between the overhead traveling vehicle 2 and the management center. is there. The overhead traveling vehicle 2 includes two carriages 4 and 4, and each carriage 4 includes a bumper 6. A main body 8 is connected to the carriages 4 and 4 by a pivot shaft shown in FIGS. 1 to 3, and a winding unit 10 is provided under the main body 8.
Then, the winding unit 10 raises and lowers the hand 12,
A hand 12 holds and conveys a work 04 such as a SMIF pod that accommodates a semiconductor substrate. Reference numerals 14 and 14 denote a pair of fall prevention members for preventing the work 04 from dropping when the hand 12 is lifted and the work 04 is transported.

[0011]

[Bogie] FIG. 1 shows the structure of the carriages 4 and 4 viewed from a direction perpendicular to the traveling direction of the overhead traveling vehicle 2, FIG. 2 shows the structure of the carriages 4 and 4 viewed from the ceiling side, and FIG. 3 shows the rails. A cross section of the carriage 4 in a direction perpendicular to 01 is shown. In these figures, the covers and the like of the carts 4 and 4 are removed. Referring to FIG. 3 to show the mounting of the carriages 4 and 4 on the rail 01, 05
Is a support for the rail 01, which has a function of adjusting the height of the rail 01, and is covered with a cover 06. Reference numeral 08 denotes an overhead line for supplying power to the overhead traveling vehicle 2, and reference numeral 09 denotes a mark for transmitting a stop position and the like to the overhead traveling vehicle 2.

As shown in FIGS. 1 to 3, a traveling motor 16 is provided substantially horizontally along the longitudinal direction of each carriage 4 (direction parallel to the rail 01), and its motor shaft 20 is substantially horizontal.
For example, it is in the range of ± 10 degrees with respect to the horizontal plane. The travel motor 16 is not provided with a brake, but a brake 18 such as an electromagnetic brake is provided separately. The motor shaft 20 and the brake shaft 22 of the brake 18 are connected to the hypoid gear 24, the rotation direction is changed by 90 degrees to rotate the traveling shaft 25, and the traveling wheel 2
6 is driven. Here, the running wheel 26 has a vertical rotating surface, but may be horizontal. 28 is a guide roller for preventing each carriage 4 from coming off from the rail 01. For example, eight guide rollers are provided for each carriage 4 as shown in FIGS. Further, guide rollers 28, 28 are provided at the tip of the bumper 6,
The bumper 6 runs smoothly on the rail portion 02. Numeral 30 is a current collector which is rotatable around a vertical axis.
The electric power is received from the electric power source and supplied to the traveling motor 16 and the like.

Reference numerals 32 and 32 denote pivot shafts for connecting the carriages 4 and 4 to the main body 8. As a result, the pair of carts 4 and 4 act as bogies with respect to the main body 8. 34, 34
Is a pivot shaft connecting the bumpers 6, 6 to the carts 4, 4, and is connected to the covers 15, 15 of the carts 4, 4. The bumper 6 travels on the rail portion 02 by the guide roller 28, and can be turned with respect to the carriage 4 by the pivot shaft 34. Proximity sensor 3 at the tip of bumpers 6 and 6
6 is provided to detect a preceding traveling vehicle, an obstacle, and the like. Reference numeral 38 denotes a reading sensor provided to face the mark 09.
The stop position and the like are detected by assisting the control data built in the main body 8.

The features of the carriages 4 and 4 will be described. It is important that the overhead traveling vehicle 2 used in a crane room or the like has a small volume. In the case of the truck 4, since the space along the longitudinal direction of the rail 01 is allocated to the overhead traveling vehicle 2, it is important to reduce the width and height of the truck 4, 4 with respect to the rail 01. In the embodiment, the traveling wheels 26 are located near the center along the longitudinal direction of each carriage 4, the traveling motor 16 is provided on one side thereof, and the brake 18 is provided on the other side. The traveling motor 16 partially projects from the carriage 4. The motor shaft 20 and the brake shaft 22 are substantially horizontal, for example, in a range of ± 10 degrees with respect to a horizontal plane, and their directions are parallel to the traveling direction of the carriage 4. Therefore, the longitudinal direction of the motor 16 and the brake 18 becomes parallel to the longitudinal direction of the rail 01, and the height and width of the carriages 4 and 4 decrease. The motor shaft 20 and the brake shaft 22 are connected to the hypoid gear 24, and drive the traveling wheels 26 by changing the direction of the rotating shaft to a right angle. In the hypoid gear 24, the axial direction of the hypoid gear 24 does not intersect with the axial directions of the motor shaft 20 and the brake shaft 22, and for example, in FIG. 1, the motor shaft 20 and the brake shaft 22 are simply arranged in parallel without overlapping. And hypoid gear 24
By using, the power can be reliably transmitted with a gear that is thinner than the bevel gear, and therefore the thickness of the gear portion can be reduced and the carriage 4,
The height of 4 can be reduced.

The traveling motor 16 and the brake 18 are provided separately from each other with the traveling wheels 26 facing each other. Since the motor 16 and the brake 18 are provided separately, the motor can be downsized, and these loads are dispersed on both sides of the traveling wheel 26 and become stable. Temporarily set the brake 18 to the traveling motor 1
If it is integrated with 6, the motor becomes large and the traveling wheels 2
6 has to be placed almost in the center of the bogie 4,
The trolley 4 becomes larger. Further, the load is concentrated on one side of the carriage 4 and becomes unstable.

Next, the two carriages 4 and 4 are separated from the main body 8 and connected by the pivot shafts 32 and 32. Since the motor 16 or the like is provided for each carriage 4, the motor 16 and the brake 18 are provided.
The diameter of the carriage is reduced, and the height and width of the carriages 4 and 4 are reduced. Further, since the carriages 4 and 4 are pivotally connected to the main body 8, as shown in FIG. 4, the overhead traveling vehicle 2 can smoothly bend the curve and the work 04 swings less. Further, since the front and rear bumpers 6 and 6 are connected to the carriages 4 and 4 by the pivot shaft 34, the bumpers 6 and 6 are arranged along the direction of the rail 01 so that
On the other hand, the proximity sensor 36 can reliably detect another preceding overhead traveling vehicle, and even if a collision occurs, it is possible to prevent the carriage 4 from directly colliding. On the other hand, unless the bumpers 6 and 6 are pivotally connected to the carriages 4 and 4, the orientation of the proximity sensor 36 is fixed to the orientation of the carriage 4 and the traveling vehicle 2 ahead of the curve may not be detected.

[0017]

[Winding Unit] FIGS. 5 to 7 show a winding unit 10 of the embodiment. The hoisting unit 10 is supported by the lower portion of the main body 8, and a hoisting unit base 40 has three hoisting drums 42 disposed on the bottom surface thereof.
Each winding drum 42 is divided into two parts, and one rope 42 is used to wind two ropes, belts, tapes, or the like, and the hand 12 is wound using a total of six ropes 80. Further, the winding drum 42 is disposed, for example, along each side of the equilateral triangle, and a separation prevention roller 44 is provided outside the drum 42 as viewed from the center of the unit 10.
To prevent the rope 80 from coming off the drum 42.

Reference numerals 46 and 46 are two sets of hoisting motors, and a brake 48 such as an electromagnetic brake is arranged separately. Reference numeral 50 denotes a motor shaft, 52 denotes a brake shaft, which is arranged in a substantially horizontal axial direction, for example, within a range of ± 10 degrees from a horizontal plane. As a result, the motors 46, 46 and the brake 48 can be arranged at substantially the same height as the drum 42 and arranged substantially horizontally. A drive gear such as a hypoid gear 54 is provided at the center of the winding unit 10, that is, at the center of the triangle formed by the three drums 42, and a transmission spur gear 56 is provided on the common shaft 55.
The hypoid gear 54 may be a bevel gear or the like that converts the rotation of the motor 46 about the horizontal direction into the rotation about the height direction, but the hypoid gear 54 is preferable because it can transmit power thinly and reliably. The spur gear 56 drives the drum 42 via a spur gear 58 on the drum 42 side. A bevel gear 60 is provided on the rotary shaft of the spur gear 58,
The bevel gear 62 of the drum 42 is rotated. Spur gear 5
Instead of 8, 58, a helical gear or the like may be used. 6
Reference numeral 4 is a guide pin for positioning the hand 12.

The operation of the winding unit 10 will be described with reference to FIG. 6. The rope 80 is attached to three points of the hand 12, for example, P.
From each point, the rope 80 is divided into two and extends upward, and the two drums 42, 42 arranged on two sides of the triangle are attached.
And take up. Here, when the hand 12 is at the lowest position, the rope 80 is inside the drum 42, and as the winding proceeds, the winding position moves to the outside of the drum 42. As a result, the rope 80 is on an isosceles triangle with each point P as the vertex, and the interval between the winding positions of the two drums 42, 42 decreases as the hand 12 rises. For this reason, at the position where the hand 12 is located below, the interval between the winding positions is large, and when the hand 12 is raised, the interval between the winding positions is reduced, and the angle formed by the two ropes 80 fixed to the same point is determined by the hand 12. It can be almost constant regardless of the rise and fall of. Therefore, the hand 12 can be stably held regardless of the height position,
Moreover, the torque required for winding is almost constant. That is, the larger the angle formed by the two ropes 80, 80, the more the hand 12
Can be stably held, but on the other hand, the torque required for winding is increased. In the embodiment, the angle formed by the two ropes is made constant regardless of the height, and the hand 12 is stably wound up or down with almost constant torque. In the embodiment, since the hand 12 is moved up and down using the six ropes 80, even if one rope is cut, the hand 12 does not tilt and the work 04 can be stably conveyed.

Next, the size of the winding unit 10 will be considered. As is clear from FIGS. 5 and 6, the motor 4
8 and the position of the drum 42 in the height direction are aligned and arranged substantially horizontally. For this reason, the height of the hoisting unit 10 is reduced, and the area occupied by the hypoid gear 54 and the spur gear 56 is reduced by overlapping them vertically. Considering the transmission of rotation from the motor 46, the rotation of the motor 46, which has a rotation axis in a substantially horizontal direction, is converted into a substantially right angle by the hypoid gear 54, transmitted to the spur gears 56 and 58, and again transmitted in the horizontal direction by the bevel gears 60 and 62. Drum 4 converted to rotation
Communicate to 2.

The three drums 42 are on three sides of an equilateral triangle, and a space is formed on a line connecting each vertex position and the hypoid gear 54 at the center. The motors 46, 46 and the brake 48 are arranged on this line to minimize the planar size of the unit 10. Further, since the brakes 48 are separated from the motors 46, 46, the size of the motors 46, 46 can be reduced, and the drum 42, the motors 46, and the brakes 48 are arranged substantially evenly around the hypoid gear 54. The load on 10 is evenly distributed. As a result, the horizontal movement of the hoisting unit 10 using the later-described lateral movement rail 78 is facilitated.

[0022]

[Lateral movement of the hoisting unit] Lateral movement of the hoisting unit 10 will be described. 5, 6 and 8, 70 is a lateral movement motor for laterally moving the winding unit 10 with respect to the main body 8, 72 is a brake thereof, and 74 is a pulley, which is driven by rotation of the motor 70. A belt 90 is attached to the pulley 74, and a threaded shaft 92 is rotated. 94 and 96 are bearings, and 76 is a female ball screw. Of these members, the female ball screw 76 is attached to the hoisting unit 10, and the other members are attached to the main body 8. Conversely, the female ball screw 76 may be attached to the main body 8 and another member may be attached to the winding unit 10 side, but this is not preferable because the weight of the winding unit 10 increases. These are collectively referred to as a feed mechanism of a winding mechanism. Note that a simple cylindrical female screw may be used instead of the female ball screw 76. Further, the lateral movement rails 78, 78 shown in FIGS. 5 and 6 are provided at the bottom of the main body 8,
The forward and backward movement of the female ball screw 76 allows the hoisting unit 10 to move on the rail 78.

In this way, the female ball screw 76 moves forward and backward with respect to the threaded shaft 92 by the rotation of the motor 70, and the winding unit 10 moves on the lateral movement rail 78. For this reason, the work 04 located in a place other than immediately below the traveling rail 01 can be loaded and unloaded, and restrictions on the position of the work 04 are greatly eased. This means that restrictions on the arrangement of ground stations (not shown) are relaxed, and the ground stations can be arranged at desired positions. In addition, the degree of freedom in the arrangement of the traveling rail 01 is increased, and the installation of the rail 01 is facilitated.

The winding unit 10 for the rail 01
The range in which the traverse can be
If the carriage 4 is fixed to the rail 01 in a stable manner, the range of lateral movement increases accordingly. Further, in the embodiment, the main body 8 is provided separately from the carriage 4, so that the lateral movement rail 78 is provided on the main body 8. However, if the main body 8 is integrated with the carriage 4, the lateral movement rail 78 is provided on the bottom of the carriage 4.
Will be provided.

[0025]

[Hand] The hand 12 will be described with reference to FIGS. 9 to 13. In FIG. 9 and FIG. 10, reference numeral 100 denotes a hand body, which is suspended from the hoisting unit 10 by a rope 80. 1
Reference numeral 02 denotes a rotating plate, which is used by the motor 104 to hand 100
To rotate. 106 is a brake, 108 is a shaft, 110 is a bevel gear connected to the shaft 108, and rotates a belt drive gear (not shown) to drive the toothed belt 112 and rotate the hand body 102. Reference numeral 114 is a mounting portion of the rope 80 (point P above), and 116
Is a positioning hole for the guide pin 64.

As shown in FIG. 10, the rotating plate 102 is provided with a substantially hemispherical centering member 120 and a spring 122 for pressing the centering member 120 downward, and the work 0
The holding plate 010 of No. 4 is engaged with the hole provided in the center and centered. Further, for example, 3 is provided on the rotating plate 102.
A pair of claws 126 is provided, and the claw shaft 124 is rotated to fit into a recess or hole provided in the holding plate 010.

Referring to FIGS. 11 and 12, a member related to the claw 126 is shown. 128 is a cam plate provided inside the rotating plate 102, 130 is a motor with a brake, and 132 is provided at the center of the cam plate 128. Bevel gear, 13
4 is a cam groove. The cam plate 128 is rotated by the bevel gear 132 by the rotation of the built-in motor 130. A roller 136 is arranged in the cam groove 134 and driven by the rotation of the cam plate 128, the rotation of the roller 136 is transmitted to the gear 138, and the claw 126 is rotated by meshing with the gear provided on the claw shaft 124. 140 is the cam plate 12
8 is a guide roller for smoothly rotating.

In order to detect the position of the holding plate 010, the light projecting portion 142 and the light receiving portion 143 constitute a position sensor, and the optical axis is arranged slightly above the fitting projection of the claw 126. That is, the holding plate 010 is in a slightly raised position until the projection at the tip of the claw 126 fits into the recess of the holding plate 010, and blocks the optical axis between the light projecting unit 142 and the light receiving unit 143. On the other hand, the holding plate 010
When the projection at the tip of the claw 126 is fitted in the concave portion of the claw 126, the position of the holding plate 010 is relatively lowered, and the light from the light projecting portion 142 can be received by the light receiving portion 143. In this way, it is detected whether the holding of the holding plate 010 by the claw 126 is completed. In addition, here, from the light projecting unit 142 to the light receiving unit 1
Although the transmitted light to 43 is used, the reflected light from the holding plate 010 may be detected by the light receiving unit 143, or the position of the holding plate 010 may be detected by a distance sensor such as an ultrasonic sensor.

FIG. 13 shows a landing detection mechanism of the hand 12. In FIG. 14, when the hand 12 descends and touches the work 04, the brake 42 stops the drum 42 and the rope 80
It is necessary to avoid slack. So hand 12
In the rope attaching portion 114, the rope 80 is fixed to the holding piece 82, housed in the case 84, and pressed downward by the spring 86. Here, when the hand 12 descends and touches the work 04 arranged at the ground station, an upward force is applied to the hand 12 from the work 04, and the rope holding piece 82 moves downward by the force of the spring 86. The position of the rope holding piece 82 is monitored by the limit switch 88, and when the holding piece 82 moves downward, the limit switch 88 comes off and the hand 12
Detects that the landed. When this is detected, the main body 8 is contacted by a line (not shown), the control circuit thereof operates the brake 48, fixes the hypoid gear 84, and fixes the drum 42. The limit switch 88
Instead of this, a proximity sensor or the like may be used to monitor the position of the holding piece 82.

As for the operation of the hand 12, the rotating plate 102 is rotated in advance before loading and unloading to rotate the workpiece 04 in the correct direction. When the hand 12 descends, the centering member 120 engages with the hole provided in the holding plate 010, and the position of the hand 12 with respect to the work 04 is finely corrected by the centering member 120 to perform centering. Although the hemispherical centering member 120 is used here, it is not limited to the hemispherical centering member 120 as long as it has a convex shape and a smooth tip. Further, by providing a protrusion for centering on the holding plate 010,
The hand 12 may be provided with a hole or a recess that engages with this protrusion.

When the centering is completed, the motor 130
Thus, the cam plate 128 is rotated, and the roller 136 is driven along the cam groove 134. This rotation is the gear 13
8 rotation, the pawl shaft 124 is rotated, and the pawl 126 is rotated.
Is rotated from the outer side to the inner side of the work 04, and fitted and held in the recess provided in the holding plate 010. Here, until the projection at the tip of the claw 126 fits into the recess, the holding plate 0
Since 10 is at a position slightly pushed up with respect to the hand 12 and the optical path between the light projecting section 142 and the light receiving section 143 is blocked, it can be detected that the gripping is not completed. Similarly, even if the holding plate 010 and the claw 126 are disengaged from each other during the conveyance of the work 04, the light projecting unit 142 and the light receiving unit 1 are also removed.
Since the optical axis between 43 is blocked, it can be detected.

Although the structures of the carriages 4 and 4 and the hoisting unit 10 are described in detail in the embodiments, these structures are arbitrary.
Further, although the horizontal movement of the winding unit 10 and the rotation of the rotating plate 102 are shown, the horizontal movement and the rotation may not be performed.

[Brief description of drawings]

FIG. 1 is a front view of a main portion of a bogie portion of an overhead traveling vehicle according to an embodiment.

FIG. 2 is a plan view of a main portion of a bogie portion of the overhead traveling vehicle according to the embodiment.

FIG. 3 is a sectional view of a main part of the bogie of the overhead traveling vehicle according to the embodiment in a vertical plane.

FIG. 4 is a diagram showing a traveling state of a curve of a bogie portion in the overhead traveling vehicle of the embodiment.

FIG. 5 is a front view of a main part of the winding unit according to the embodiment.

FIG. 6 is a bottom view of the winding unit according to the embodiment.

FIG. 7 is a diagram showing connection of a motor, a brake, and a hypoid gear in the winding unit of the embodiment.

FIG. 8 is a view showing a disassembled state of the winding unit in the height direction in the example.

FIG. 9 is a diagram showing a disassembled state along the rotating plate of the hand in the embodiment.

FIG. 10 is a diagram showing a disassembled state of the hand in the height direction according to the embodiment.

FIG. 11 is a diagram showing a disassembled state along the cam plate of the hand in the embodiment.

FIG. 12 is a sectional view in the height direction of the main part of the hand according to the embodiment.

FIG. 13 is a diagram showing a landing detection mechanism of the hand in the embodiment.

FIG. 14 is a perspective view of the overhead traveling vehicle of the embodiment.

[Explanation of symbols]

01 Rail 72 Brake 02 Rail part 74 Pulley 03 Communication cable 76 Female ball screw 04 Work 78 Horizontal movement rail 05 Support 80 Rope 06 Cover 82 Rope holding piece 07 Ceiling 84 Case 08 Overhead line 86 Spring 09 Mark 88 Limit switch 010 Holding plate 90 Belt 2 Overhead traveling vehicle 92 Screwed shaft 4 Bogie 94 Bearing 6 Bumper 94 Bearing 8 Main body 100 Hand main body 10 Winding unit 102 Rotating plate 12 Hand 104 Hand rotating motor 14 Fall prevention member 106 Brake 15 Cover 108 Shaft 16 Traveling motor 110 Bevel gear 18 brake 112 toothed belt 20 motor shaft 114 rope attachment part 22 brake shaft 116 positioning hole 24 hypoid gear 120 centering member 5 Travel Axis 122 Spring 26 Travel Wheel 124 Claw Axis 28 Guide Roller 126 Claw 30 Current Collector 128 Cam Plate 32 Pivot Axis 130 Motor 32 Pivot Axis 132 Bevel Gear 36 Proximity Sensor 134 Cam Groove 38 Read Sensor 136 Roller 40 Rolling Unit Base 138 Gear 42 Winding drum 140 Guide roller 44 Disengagement prevention roller 142 Light emitting unit 46 Winding motor 143 Light receiving unit 48 Brake 50 Motor shaft 52 Brake shaft 54 Hypoid gear 55 Common shaft 56 Spur gear 58 Spur gear 60 Bevel gear 62 Bevel gear 64 Guide pin 70 Lateral movement motor

Claims (3)

[Claims] 1. An overhead traveling vehicle comprising a main body supported by a traveling rail laid along the ceiling of a building to travel, a winding unit provided at a lower portion of the main body, and a hand that is raised and lowered by the winding unit, A feed mechanism for suspending the hoisting unit and moving the hoisting unit along the traverse rail is provided on the traverse rail arranged at the bottom of the traverse rail at a substantially right angle to the moving direction of the body. The overhead traveling vehicle. 2. The hand includes a hand body and a rotating plate,
A gripping mechanism is provided for rotating the rotating plate with respect to the hand main body, the hand main body is hung by a winding unit, and the rotating plate holds an article to be conveyed. The overhead traveling vehicle according to claim 1, further comprising a mechanism. 3. The feed mechanism comprises a lateral movement motor, a threaded shaft rotated by the motor, and a female screw meshed with the threaded shaft.
The overhead traveling vehicle according to claim 1.