JPH10291620A - Conveying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conveyer which is inexpensive, has high designing freedom, and transfers a truck certainly, by enabling the truck to move carrying a work on a process line and a base table which conveys the truck to rotatably support a magnet-made roller which rotates on a rail in a conveying zone. SOLUTION: A plain-plate-shaped base table 3 moves along a rail 2, and at the front side and back side of the base table 3, permanent-magnet-made rollers 4, 4 are supported by the base table 3 such that they can rotate on a rail 2. In this supporting structure, rotational shaft 4a are placed between brackets 3a, 3a and rollers 4 are attached to them. A controlling unit in a controlling unit box 6 controls them. The base table 3 includes upward-projecting dog 12 at height where the dog 12 can engages with a hook 1c which is hung downward from lower side of the front end of a truck 1. Thus, designing freedom of the truck 1 in relation with height can be improved, and simple entire structure enables manufacturing cost to be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer apparatus for moving a carriage on which a load such as a work is loaded on a line in a factory.

[0002]

2. Description of the Related Art Conventionally, as a transfer device for moving a heavy object such as a vehicle body on a line in a factory, for example, a chain drive type shown in FIG. 5 and a hoist type shown in FIG. 6 are known. ing. The transport device shown in FIG. 5 is provided with pits 04 below the floor at the upstream and downstream ends of a transport zone 03 for moving a trolley 02 carrying a vehicle body 01 on a factory line. A drive gear 07 that is rotated to transmit a driving force to the chain 06 and a take-up gear 08 engaged with the chain 06 are provided.
2 is provided with dogs 010 that can be engaged with hooks 09 provided at predetermined intervals. And motor 0
5 drives the chain 06, and the carriage 02 sent from the upstream of the transport zone 03 moves to the dog 0 of the chain 06.
10, the carriage 02 is moved along the chain 06 together with the movement of the chain 06. The transfer device shown in FIG. 6 includes a motor 21 for rotating a roller 022 on a hoist base 023 provided with a rail 021 having an I-shaped cross section along a line and supporting a roller 022 rolling along the rail 211. The hoist base 023 is provided with a dog 025 that engages with the hook 09 of the carriage 02. Therefore,
When the motor 024 is driven, the roller 022 rotates and the hoist base 023 moves along the rail 21, and when the dog 025 engages with the hook 09 of the trolley 02 at a predetermined position, the trolley 02 moves together with the hoist base 023. Things that move.

[0003]

However, the above-described conventional transport device has problems to be solved as described below. That is, in the former prior art shown in FIG. 5, the motor 05 and the gear 07,0 are placed under the floor of the factory.
8 needs to be provided, and a chain 06 needs to be provided over the entire length of the transporting carriage 02, so that a large installation space is required. However, there is a problem that the cost increases. And, as described above, a large installation space is required and the pit 04 is necessary, so the degree of freedom in design is low, and a case where a change such as changing the length or direction of the existing line is added, or It was difficult to apply this method when a new line was installed alongside an existing line. FIG.
In the latter prior art shown in (1), the roller 022 rolls between the flanges 026 and 026 of the I-shaped rail 021. Therefore, the vertical dimension is increased. Has a restriction that the vertical dimension is about 500 mm and the ground height of the bogie 02 needs to be higher than this.
It is difficult to use and its versatility is low. That is, in the case where a part of the line is changed as described above, if the ground height of the existing bogie 02 is less than the above value (500 mm) when this technology is used, It is necessary to exchange all the trolleys 02 in order to pass a part of them. The present invention has been made in view of the above-described conventional problems, and is inexpensive, has a high degree of freedom in design, has less restrictions on the height of the bogie, and ensures that the bogie is moved. It is an object of the present invention to provide a transfer device capable of performing the following.

[0004]

Means for Solving the Problems In order to achieve the above-mentioned object, a transfer device according to the present invention includes a carriage capable of placing a work on a processing line and moving the work, and a predetermined carriage forming at least a part of the processing line. A rail provided along the transport zone, a base rotatably supporting a roller made of magnets rolling on the rail, and guiding the base so that the roller of the base does not come off the rail. Guide means, a motor provided on the base to rotate the roller, a dog provided on the base and engageable with a hook provided on the carriage, a power supply means for supplying power to the motor, and Control means for controlling the driving of the motor. According to a second aspect of the present invention, in the transport apparatus of the first aspect, two rollers are provided before and after the base, and the motor is provided so as to input a driving force to one of the two rollers. And a chain for transmitting drive between both rollers is provided. According to a third aspect of the present invention, in the transport apparatus according to the first or second aspect, the guide means is a plurality of guide rollers rotatably supported on a base along both side surfaces of the rail. And The invention of claim 4 is the invention of claims 1 to 3
In the transfer device described above, the power supply means is a power supply cable connecting a power supply and a motor, and the power supply cable is wound on a drum provided below the floor at an upstream end of a line flow in the transfer zone. It is characterized by being provided so that it can be wound by force.

[0005]

According to the present invention, first, the base is arranged at the upstream end of the transport zone. Then, when the cart carrying the work is sent to this transport zone, first, the dog provided on the base is engaged with the hook of the cart, and the motor is driven to rotate the rollers. When the roller rotates, the roller rolls on the rail, and accordingly, the base moves along the rail, and the carriage engaged with the base also moves. At this time, the base is guided by the guide means, and the roller does not come off the rail. Further, the roller rolls on the rail as described above. However, since the roller is formed of a magnet, the bogie can be moved without idling even if the roller has a small ground contact load. . When the base and the carriage reach the downstream end of the transport zone in this way, the motor is reversely driven to rotate the rollers in reverse, returning the base to the initial position and preparing for the next carriage to be sent. . According to the second aspect of the present invention, when the motor is driven to rotate the roller, the other roller is also rotated by the drive transmission by the chain. As described above, since the driving force of the motor is distributed to the two rollers, the drive transmission between the rollers and the rails is more stable, and idling is more difficult to occur. According to the third aspect of the present invention, since the plurality of guide rollers provided on the base roll on both side surfaces of the rail, the base does not swing right and left with respect to the rail and moves along the rail without fail. I do.

According to the fourth aspect of the present invention, power is supplied to the motor via a power supply cable. As the base advances, the power supply cable wound on the drum is unwound with the advance. Then, when the base reaches the downstream end of the transport zone and returns to the initial position, the slack of the power supply cable is wound around the drum as needed by the movement of the base in the return direction.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. First, the overall configuration will be described. This embodiment is an example applied to a production line of an automobile. In the case of this embodiment, as shown in FIG. 3 which is a schematic layout diagram, the existing line A is different from the existing line A in parallel. A case where a new line B for processing is provided will be described as an example. In the case where the new line B is added in parallel to the existing line A as described above, conventionally, it is difficult to install the new line B due to a lack of sufficient installation space and various design restrictions due to the existing line A. However, in the present embodiment, this is solved by the following technical means.

In both lines A and B, the work W (see FIG. 4) is sent from left to right in the figure. In the present embodiment, the new line B is composed of three transport zones, that is, a first transport zone b1, a second transport zone b2, and a third transport zone b3, which are connected in series. A first machine G (1), a second machine G (2), and a third machine G (3) are provided as the transport device of the embodiment. In addition,
In the case of showing the transport device of the embodiment, when a specific device is not pointed out, it is simply displayed as a transport device G, and when it points to a specific device, it is displayed as an n-th device G (n) (note that ,
n = 1 to 3). Further, the first transport zone b
The length of each of the first and second transport zones b2 is 22 m,
Although the length of the third transport zone b3 is set to 19 m, these are determined in consideration of the moving speeds of the front and rear conveyors C1 and C2, and are not limited to these numerical values.

Further, in this embodiment, when the work W (see FIG. 4) placed on the carriage 1 is transferred from the flow of the existing line A to the new line B, it is sent by the conveyor C1. After being moved by T in the direction orthogonal to the flow direction of the existing line A, it is sent to the upstream end of the first machine G (1) by the connecting feeder F1. Also, the connection between the first machine G (1) and the second machine G (2) and the connection between the second machine G (2) and the third machine G (3) are performed by the connecting feeders F2 and F3, respectively. Is configured.

Next, a transfer device G according to an embodiment will be described. As shown in FIG. 4, the carriage 1 is supported by a plurality of wheels 1b that can roll on the floor surface FL of the frames A on which the workpiece W is placed.

In FIG. 1, reference numeral 2 denotes a rail. The rail 2 has a C-shaped cross section as shown in FIG. 2, and is laid along a new line B as shown by a dotted line in FIG.

As shown in FIG. 1, the transfer device G has a flat base 3 that moves along the rail 2.
Before and after the base 3, rollers 4 made of permanent magnets
4 is supported on the base 3 so that the upper surface of the rail 2 can roll. In addition, this support is carried out by erecting brackets 3a, 3a on the left and right sides of the base 3, and bridging a rotating shaft 4a between the brackets 3a, 3a in a rotatable state.
The structure is such that the roller 4 is attached to the roller.

A motor 5 for rotating the rear roller 4 of the rollers 4 is attached to the base 3. The rotation of the motor 5 is controlled by a control unit (control means; not shown) provided in a control unit box 6 attached to the side of the base 3. The details of the drive control will be described later.

Gears 7 are fixed to the rotating shafts 4a, respectively (see FIG. 2), and a chain 8 is hung over both gears 7. Therefore, when the motor 5 rotates, both rollers 4 and 4 rotate.

The control unit and the motor 5 include:
A power supply cable 9 for supplying electricity is connected. The power supply cable 9 is wound around a drum 11 provided inside a hole 10 provided at the most upstream portion (the left end in FIGS. 3 and 4) of each car G. The power supply cable 10 is configured to be wound up by a biasing force. Therefore, when the power supply cable 9 is pulled with a force stronger than the urging force, the power supply cable 10 is pulled out from the drum 11. Is wound around the drum 11.

A limit switch (not shown) is provided on the side of the rail 2 for detecting that the carriage 1 has moved to the upstream end and the downstream end of the installation position of each car G. The detection signals of these switches are also input to the control unit. In this embodiment, the power supply to the motor 5 is performed by the power supply cable 9. However, wires connected to the power supply are provided along the rails 2, while the base 3 has the wires. May be provided with a brush or the like that constantly contacts the motor and inputs electric power to supply electric power to the motor 5.

A dog 12 is provided on the base 3 so as to protrude upward at a height at which the dog 12 can be engaged with a hook 1c hanging down from the lower surface of the front end of the carriage 1. The dog 12 has pins 1 attached to brackets 12 a, 12 a (see FIG. 2) which are provided side by side with the dog 12 and erected from the base 3.
2b is supported rotatably back and forth about the center 2b, and is urged to rotate by a spring (not shown) in the direction of arrow R in the figure, and the rotation in this direction is restricted by the stopper 12c at the position shown in the figure. Have been. Further, a cam surface 12d that is inclined forward and upward is formed at the rear end edge of the dog 12. Therefore, when the cart 1 is sent and the hook 1c collides with the cam surface 12d from behind, the dog 12
When the hook 1c gets over the dog 12 while rotating the dog 12 in the direction opposite to the arrow R and the hook 1c passes, the dog 12 returns to the position shown in the figure by the urging force of a spring (not shown). In this state, when the base 3 advances forward (to the right in the drawing) and the dog 12 collides with the hook 1c, the rotation of the dog 12 in the direction of the arrow R is restricted by the stopper 12c. The dog 12 and the hook 1c are engaged with each other.

Further, a pair of guide rollers 13 that roll along the left and right side surfaces of the rail 2 are provided at a lower front portion and a lower portion of the base 3, respectively. 13, the roller 4 of the base 3 is
, And move along the rail 2 without derailing left and right.

At the front end of the base 3, an obstacle detection rod 14 projects forward. When the tip of the obstacle detection rod 14 collides with an object and changes its inclination, this is regarded as an obstacle. It is configured to be detected.

The connecting feeders F1 to F
Although not shown in detail in FIG. 3, a piston rod 16 provided with a dog 15 at the tip thereof for engaging with the hook 1c and driving the piston rod 16 back and forth as shown in FIG. And an air cylinder 17 to be operated.

Next, the operation of the embodiment will be described. When the trolley 1 is sent to the upstream of the lines A and B by the conveyor C1, the trolley 1 is further moved in a direction orthogonal to the flow by the traverser T, and further, the first machine G (1) is transferred by the connecting feeder F1. ) Is moved to the upstream end position. At this time, the base 3 of the first machine G (1)
The hook 1c of the truck 1 collides with the dog 12 of the base 3 and moves the dog 12 when the truck 1 is moved by the connecting feeder F1 as described above. While turning forward, dog 1
Move ahead of 2.

From this state, the control unit drives the motor 5. When the rollers 5 rotate by the driving of the motor 5, the base 3 moves on the rail 2, and when the dog 12 engages with the hook 1 c of the carriage 1, the base 3 presses the carriage 1. . At this time, since a downward load is not applied to the base 3, when the roller 4 is formed of a material other than a magnet such as metal, resin, or rubber, the friction acting between the roller 2 and the rail 2 is small. On the other hand, it is difficult to pull the bogie 1 by idling, but in this embodiment, since the roller 4 is formed of a permanent magnet, the rail 2
Therefore, the bogie 1 can be reliably rotated and pressed against the bogie 1 without causing a large amount of friction with the wheel.

Then, when the base 3 and the carriage 1 move to the rear end of the first transport zone b1, and this is detected by a limit switch (not shown), the control unit rotates the motor 5 in the reverse direction. The reverse rotation of the motor 5 is performed until the limit switch at the upstream end of the first machine G (1) detects the base 3, whereby the base 3 Will wait.

On the other hand, the trolley 1 moved to the rear end of the first transport zone b1 is moved to the upstream end position of the second machine G (2) by the connecting feeder F2, and the second machine G (2).
Performs the same operation as that of the first machine G (1), and the carriage 1 is moved to the downstream end position of the second transport zone b2.
Then, similarly, the bogie 1 is controlled by the connecting feeder F3.
Is moved from the downstream end of the second machine G (2) to the upstream end of the third machine G (3), and the third machine G (3) performs the same operation, so that the bogie 1 moves along the new line B. Things that move.

In performing the above operations, if the work is not performed smoothly and the trolley 1 gets stuck halfway, the obstacle detection rod 15 collides with the preceding trolley 1, thereby causing an obstacle. When detected, the control unit reverses the motor 5 to return the base 3 to the upstream end position of each car G. In this case, when the jammed carriage 1 is moved manually to eliminate the jammed state, the operation of the apparatus G is restarted.

As described above, the following effects can be obtained in the embodiment. a) Since the roller 4 has a structure that rolls on the C-shaped rail 2, it has a structure in which the roller 022 rolls between the flanges 026 and 026 of the I-shaped rail 021 as in the prior art of FIG. 6. In comparison, the vertical dimension can be reduced. Therefore, the versatility can be improved by improving the degree of freedom in designing the bogie 1 with respect to the ground height.

B) Since the roller 4 is formed of a permanent magnet, even if the roller 4 rolls on the rail 2 as in the above a), the carriage 1 can be reliably moved without idling. Can be done.

C) As the configuration of the transfer device G of the embodiment, a rail 2, a base 3 for moving the rail 2, a base 3
The main configuration is a power supply cable 9 for supplying electric power to the motor 5 provided in the above-described configuration, so that the overall configuration is simple, inexpensive, and designed in such a manner that the new line B is arranged alongside the existing line A. When installing equipment in a part with many restrictions, adding a process to an existing line, or changing the process, the length of the device is changed. It is suitable for making improvements such as mechanized zones.

[0029]

As described above, the transport device of the present invention has a configuration in which the rollers provided on the base roll on the rails, so that the rollers roll between the flanges of the I-shaped rail. Compared with the prior art, the size in the vertical direction can be reduced, and therefore, the effect of improving the versatility by improving the design freedom with respect to the ground height of the bogie is obtained, and the roller is made of a permanent magnet. Since the roller is formed, even if the roller is configured to roll on the rail as described above, an effect is obtained that the carriage can be reliably moved without causing the roller to idle. In addition, since the overall structure is simple, manufacturing costs can be reduced. According to the second aspect of the present invention, the roller is moved back and forth by two.
In this configuration, the driving force of the motor is distributed to the two rollers, the rollers are less likely to idle, and the effect of stabilizing the drive transmission between the rollers and the rails is obtained. can get. According to the third aspect of the present invention, since the guide means is constituted by a plurality of guide rollers rolling on both side surfaces of the rail, the base can be reliably moved along the rail by simple means. According to the fourth aspect of the present invention, when the power is supplied to the motor by the power supply cable, a drum for winding the power supply cable with a predetermined winding force is provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view (a cross-sectional view taken along line S1-S1 in FIG. 2) of a transfer device according to an embodiment of the present invention when viewed from a side.

FIG. 2 is a cross-sectional view (S2-S in FIG. 1) of the embodiment viewed from the rear.
FIG.

FIG. 3 is a schematic layout diagram of the embodiment.

FIG. 4 is an operation explanatory diagram of the embodiment.

FIG. 5 is a side view showing a conventional technique.

FIG. 6 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 Reference Signs List 1 cart 1a frame 1b wheel 1c hook 2 rail 3 base 3a bracket 4 roller 4a rotating shaft 5 motor 6 control unit box 7 gear 8 chain 9 feeding cable 10 hole 11 drum 12 dog 12a bracket 12b pin 12c stopper 12d stopper 12d Guide roller 14 Obstacle detection rod 15 Dog A Existing line B New line W Work b1 to b3 Transport zone G1 First machine G2 Second machine G3 Third machine C1, C2 Conveyor FL Floor surface T Traverser F1 to F3 Connecting feeder

Claims (4)

[Claims] 1. A bogie capable of mounting and moving a work on a processing line, a rail provided along a predetermined transport zone constituting at least a part of the processing line, and rolling on the rail. A base for rotatably supporting a roller made of magnets, guide means for guiding the base so that the rollers of the base do not derail from the rail, and a motor provided on the base to rotate the rollers A dog provided on the base and capable of engaging with a hook provided on the carriage; a power supply unit for supplying power to the motor; and a control unit for controlling driving of the motor. Characteristic transport device. 2. The apparatus according to claim 1, wherein two rollers are provided before and after the base, the motor is provided to input a driving force to one of the rollers, and a chain for transmitting drive between the two rollers is provided. The transfer device according to claim 1, wherein the transfer device is provided. 3. The transport apparatus according to claim 1, wherein the guide means is a plurality of guide rollers supported on a base so as to roll along both side surfaces of the rail. 4. The power supply means is a power supply cable for connecting a power supply and a motor, and the power supply cable has a predetermined winding force on a drum provided below the floor at the upstream end of the line flow in the transport zone. 4. The transport device according to claim 1, wherein the transport device is provided so as to be able to be wound.