JP2015063719A - Transport device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transport device that can make a carrier travel without restricting the travel speed too much even when a mounting part and an object to be treated receive flow resistance due to a treatment liquid in a treatment tank.SOLUTION: When a transport device 1 makes a plurality of carriers 2 continuously travel along a transport rail 3, the carriers 2 are made to travel while immersing automobile bodies 7, each mounted on each of the carriers 2, in a treatment liquid W stored in a treatment tank 4. The carrier 2 includes: a travel part 21 that is driven by a driving source 211 to travel along the transport rail 3; a mounting part 22 that hangs from the travel part 21 and mounts the automobile body 7 thereon; and a lifting part 23 that is set to the travel part 21 to move up and down the mounting part 22. A side wall surface 43 in a factory provided with the treatment tank 4 is provided with rotors 5 for making the mounting part 22, hanging from the travel part 21, travel in synchronization with the travel speed of the travel part 21 when the automobile body 7 passes through the treatment liquid W.

Description

  The present invention relates to a transport device that continuously travels a plurality of transport vehicles along a transport rail.

  2. Description of the Related Art In a production line for automobiles, a plurality of conveyance vehicles carrying automobile bodies that are objects to be processed are run along conveyance rails, and assembly, painting, and the like are sequentially performed on each automobile body. Further, in the process of performing electrodeposition coating or the like in the production line, the transport vehicle is run while the mounting portion on which the automobile body is mounted is immersed in a treatment liquid in a dip tank such as an electrodeposition paint tank.

For example, in the pretreatment electrodeposition coating apparatus of Patent Document 1, a hanger frame for mounting an automobile body is provided on a trolley that moves along a transport rail so that it can be moved up and down by a pair of hoists, in order to increase operating efficiency. Keep the hanger frame tilted. And the automobile body mounted in a hanger frame is moved along the conveyance rail in the state which inclined the hanger frame in the processing tank. Moreover, in order to ensure the rigidity of the hanger frame when suspended by a pair of hoists, a pantograph is provided between the trolley and the hanger frame.
Moreover, for example, in the surface treatment apparatus of Patent Document 2, a hanger that supports the vehicle body is suspended from the rail of the conveyor. Then, the hanger is moved while the vehicle body is immersed in the treatment liquid of the treatment tank in which the electrodeposition treatment is performed by the hanger arm provided on the hanger.

JP 2007-77477 A Japanese Patent Laid-Open No. 10-8292

  However, when the transport vehicle is run while the automobile body mounted on the mounting part is immersed in the treatment liquid in a dip tank such as an electrodeposition paint tank, the mounting part and the automobile body have flow resistance due to the treatment liquid. receive. And the followable | trackability of the mounting part with respect to the driving | running | working part of a conveyance vehicle worsens, and there exists a possibility that a mounting part and a motor vehicle body may interfere with a peripheral device etc. Therefore, it is necessary to limit the traveling speed of the conveyance vehicle to such an extent that the flow resistance due to the treatment liquid does not adversely affect the followability of the mounting portion. Even when the pantograph disclosed in Patent Document 1 is used, there is a limit to the strength of the pantograph itself, and it is necessary to limit the traveling speed. Furthermore, when using the hanger arm of patent document 2, it is necessary to restrict | limit a running speed similarly.

  The present invention has been made in view of such a background, and even when the mounting portion and the object to be processed are subjected to flow resistance due to the processing liquid in the processing tank, the transport vehicle can be driven without much limiting the traveling speed. It was obtained in an attempt to provide a transport device.

In one embodiment of the present invention, when a plurality of transport vehicles are continuously traveled along a transport rail, the transport object is immersed in a processing liquid stored in a processing tank while an object to be mounted on the transport vehicle is immersed therein. A transport device configured to drive a vehicle,
The transport vehicle is driven by a drive source and travels along the transport rail, a mounting unit that is suspended from the travel unit and on which the workpiece is mounted, and is disposed in the travel unit. An elevating part for raising and lowering the mounting part,
On the side wall surface of the processing tank or the side wall surface in the factory where the processing tank is provided, when the workpiece passes through the processing liquid, the mounting unit suspended from the traveling unit, Synchronous traveling means for traveling in synchronization with the traveling speed of the traveling unit is provided.

The said conveying apparatus is made to drive | work continuously several conveyance vehicles which have a traveling part, a mounting part, and an raising / lowering part along a conveyance rail. Moreover, in the conveying apparatus, the device at the time of making a conveyance vehicle drive | work is immersed while the to-be-processed object mounted in the mounting part of a conveyance vehicle is immersed in the process liquid stored in the processing tank.
Specifically, a synchronous traveling means is provided on the side wall surface of the processing tank or the side wall surface in the factory where the processing tank is provided, and the object to be processed passes through the processing liquid by the synchronous traveling means. At this time, the mounting unit suspended from the traveling unit is caused to travel in synchronization with the traveling speed of the traveling unit. As a result, the mounting portion on which the object to be processed is mounted can be driven directly by the synchronous traveling means to travel.

  Therefore, according to the said conveying apparatus, even when a mounting part and a to-be-processed object receive the flow resistance by the process liquid of a processing tank, a conveyance vehicle can be made to drive | work without restrict | limiting a traveling speed very much.

Explanatory drawing which shows typically the production line provided with the conveying apparatus concerning an Example in the state seen from the side. Explanatory drawing which shows typically the conveyance apparatus concerning an Example in the state seen from the side. Explanatory drawing which shows typically the conveyance apparatus concerning an Example in the state seen from the running direction of the conveyance vehicle. Explanatory drawing which shows typically the production line provided with the other conveying apparatus concerning an Example in the state seen from the side.

A preferred embodiment of the above-described transfer device will be described.
In the transfer apparatus, the synchronous traveling means may be provided on a side wall surface on one side of the processing tank and drive a side surface on one side of the mounting portion. Moreover, the said synchronous running means can also be provided in the side wall surface of the both sides of the said processing tank, and can also drive the side surface of the both sides of the said mounting part.
The side wall surface of the processing tank or the side wall surface in the factory where the processing tank is provided means a wall surface located in a direction crossing the traveling direction of the traveling unit and the mounting unit in the processing tank or the factory. .

Moreover, in the said conveying apparatus, the said synchronous traveling means may be provided above the liquid level of the said process liquid in the said side wall surface.
In this case, when the synchronous traveling means travels the mounting portion, the synchronous traveling means is not immersed in the processing liquid and can be prevented from being adversely affected by the processing liquid.

The synchronous traveling means is rotatably provided on the side wall surface, and is in contact with the side surface of the traveling unit, and the lower roller unit is in contact with the side surface of the mounting unit suspended from the traveling unit. Is constituted by a rotating body arranged concentrically, and the rotating body is configured to run in synchronism with the traveling unit by rotating following the traveling of the traveling unit. It may be.
In this case, the synchronous traveling means can be formed very easily by the rotating body provided with the upper roller portion and the lower roller portion. Further, the synchronous traveling means can be formed by a mechanical configuration utilizing the rotation of the rotating body, and the mounting portion can be driven without using electrical control. Further, it is not necessary to separately use a drive source for driving the mounting portion, and the structure of the entire transport apparatus can be simplified.

  The synchronous traveling means may be configured to drive the mounting portion using a motor that operates by electricity, air pressure, or the like. In this case, the rotational operation of the motor that travels the traveling unit and the rotational operation of the motor that travels the mounting unit can be easily synchronized by performing electrical control.

In the processing tank, on the side wall surface opposite to the side wall surface on which the synchronous traveling means is provided, when the traveling unit travels, a guide rail that guides the lifting position of the mounting unit by the lifting unit. It may be provided.
In this case, the raising / lowering position of the mounting part to be raised / lowered by the raising / lowering part can be appropriately guided by the guide rail.
In addition, the guide rail can prevent the mounting portion from being separated from the synchronous traveling means, and it is possible to suppress the occurrence of a phenomenon such as slip (slip) in the synchronous traveling means that contacts the mounting portion.

Further, the object to be treated is an automobile body, and the treatment liquid stored in the treatment tank is subjected to chemicals for pre-coating treatment, washing liquid for washing, or electrodeposition coating on the automobile body. It may be a paint for.
In this case, do not limit the running speed of the traveling part and the mounting part when performing pre-painting treatment (degreasing, surface adjustment, etc.), washing or electrodeposition coating on the automobile body, and perform these efficiently. Can do.

In the following, an embodiment of the transport apparatus will be described with reference to the drawings.
As shown in FIG. 1, the transport device 1 of the present example causes the transport vehicle 2 to move into the processing liquid W stored in the processing tank 4 when the transport vehicles 2 continuously travel along the transport rail 3. The conveyance vehicle 2 is configured to travel while immersing the automobile body 7 as an object to be mounted. As shown in FIGS. 2 and 3, the transport vehicle 2 is driven by a drive source 211 and travels along the transport rail 3, and a mounting portion on which the vehicle body 7 suspended from the travel unit 21 is mounted. 22 and an elevating part 23 that is disposed in the traveling part 21 and raises and lowers the mounting part 22. On the side wall surface 43 in the factory where the treatment tank 4 is provided, when the automobile body 7 passes through the treatment liquid W, the mounting portion 22 suspended from the traveling portion 21 is set to the traveling speed of the traveling portion 21. A rotating body 5 is provided as a synchronous traveling means for traveling in synchronization.

Below, it demonstrates in detail with reference to FIGS. 1-4 about the conveying apparatus 1 of this example.
Although illustration is omitted, the conveyance device 1 of this example is used for performing an electrodeposition coating process in an automobile production line. In the production line, a pretreatment process for cleaning, degreasing, surface adjustment and the like is provided before the electrodeposition coating process. The production line is provided with a plurality of treatment tanks for storing various treatment liquids W for performing cleaning, degreasing, surface adjustment, electrodeposition coating, and the like. As shown in FIG. 1, the treatment tank 4 that travels the transport vehicle 2 while immersing the automobile body 7 in the treatment liquid W is an electrodeposition treatment tank for performing electrodeposition coating, and the treatment stored in the treatment tank 4. The liquid W is a paint for performing electrodeposition coating on the automobile body 7. As shown in FIG. 3, a plurality of transport vehicles 2 circulate sequentially along the transport rail 3 in the pretreatment process and the electrodeposition coating process of the production line. The transport rail 3 is provided on the top surface 46 in the factory so that the plurality of transport vehicles 2 are suspended and run.

  As shown in FIG. 1, the conveyance rail 3 which forms a production line is continuously provided on the top surface 46 in the factory located above the place where various processing tanks are provided. The bottom portion 41 of the inlet portion 401 of the processing tank 4 is inclined so as to gradually become deeper forward in the traveling direction of the transport vehicle 2, and the bottom portion 41 of the main body portion 402 is substantially parallel to the horizontal direction. The bottom portion 41 of the portion 403 is inclined so as to gradually become shallower in the traveling direction of the transport vehicle 2. The transport vehicle 2 enters the processing liquid W in an inclined state so that the front side is lowered at the inlet portion 401 of the processing tank 4, thereby easily discharging the air remaining in the automobile body 7 out of the processing liquid W. Can do. Further, the transport vehicle 2 can return the processing liquid W remaining in the automobile body 7 to the processing tank 4 by exiting from the processing liquid W in an inclined state so that the rear side of the processing tank 4 is lowered at the outlet portion 403 of the processing tank 4.

  As shown in FIGS. 2 and 3, the rotating body 5 is rotatably provided above the liquid level W <b> 1 of the processing liquid W on the side wall surface 43 in the factory where the processing tank 4 is provided. Here, the side wall surface 43 in the factory in which the processing tank 4 is provided may be formed continuously from the side wall surface 42 of the processing tank 4 or may be various wall surfaces provided in the factory. . The rotating body 5 of this example is provided on a side wall surface 43 on one side in the factory, which is formed continuously from the side wall surface 42 on one side of the main body portion 402 of the processing tank 4.

  The rotating body 5 is integrally provided with an upper roller portion 51 that contacts the side surface of the traveling portion 21 and a lower roller portion 52 that contacts the side surface of the mounting portion 22 suspended from the traveling portion 21. ing. The rotating body 5 is supported by a bearing 44 provided on a side wall surface 43 on one side in a factory so as to be able to idle in a state where the central axis extends in the vertical direction. A plurality of (three in this example) rotating bodies are arranged on the side wall surface 43 on one side in the factory, which is located above the side wall surface 42 on one side of the main body portion 402 of the processing tank 4, along the traveling direction of the transport vehicle 2. 5 is provided. Each rotating body 5 is configured to run in synchronization with the traveling unit 21 by rotating the rotating body 5 following the traveling of the traveling unit 21.

  As shown in FIGS. 2 and 3, in the treatment tank 4, the side wall surface 45 opposite to the side wall surface 43 provided with the plurality of rotating bodies 5 is moved by the elevating unit 23 when the traveling unit 21 travels. A guide rail 6 that guides the lift position of the mounting portion 22 is provided. The mounting portion 22 of the transport vehicle 2 is provided with a guide roller 224 that is in rolling contact with the guide rail 6 and moves the mounting portion 22 along the guide rail 6. Since the guide rail 6 is provided on the side wall surface 45 opposite to the side wall surface 43 provided with the rotating body 5, the mounting portion 22 can be prevented from being separated from the rotating body 5. In addition, it is possible to make it difficult for a phenomenon such as slip (slip) to occur in the lower roller portion 52 that contacts the side surface of the mounting portion 22.

  The transport vehicle 2 of this example is a self-propelled type having a driving source 211 such as a motor for traveling in the traveling unit 21. The traveling unit 21 is provided with wheels 212 that are in rotational contact with the transport rail 3. The traveling unit 21 is configured to self-travel along the transport rail 3 by driving the wheels 212 by the drive source 211. The elevating unit 23 is a hoist 230 provided in the traveling unit 21, and the hoist 230 is provided before and after the traveling unit 21. The hoist 230 is configured such that the suspension chain 232 can be wound and pulled out from the main body 231.

  As shown in FIGS. 2 and 3, the lower end portion of the suspension chain 232 of the hoist 230 is attached to the mounting portion 22. The mounting portion 22 is lowered when the hanging chain 232 is pulled out from the main body portion 231, and is raised when the hanging chain 232 is wound around the main body portion 231. The hoist 230 is configured to wind and pull out the suspension chain 232 by a drive source such as a motor. Moreover, the mounting part 22 when entering / exiting the process tank 4 can be inclined by adjusting the pull-out amount of the suspension chain 232 of the front and rear hoists 230.

  The mounting unit 22 includes a mounting frame unit 223 on which the automobile body 7 is mounted, an upper frame unit 221 that is disposed above the mounting frame unit 223 and to which the suspension chain 232 of the hoist 230 is attached, It has the connection frame part 222 which connects the edge part of the frame part 221 and the edge part of the mounting frame part 223 to an up-down direction. The lower roller portion 52 of the rotating body 5 contacts the side surface of the upper frame portion 221 of the mounting portion 22 that is not immersed in the processing liquid W.

Next, the operation of performing electrodeposition coating on the automobile body 7 using the transport device 1 and the effects of the transport device 1 will be described.
In performing the pretreatment process and the electrodeposition coating process in the automobile production line, the transport device 1 is operated, and the vehicle body 7 is mounted on the mounting portion 22 of each transport vehicle 2. In addition, each transport vehicle 2 on which the automobile body 7 is mounted is sequentially driven. And in each processing tank of a pre-processing process, the mounting part 22 is lowered | hung by the raising / lowering part 23, the motor vehicle body 7 mounted in the mounting part 22 is immersed in the process liquid W, cleaning, degreasing | defatting, surface adjustment, etc. Process.

  Further, in the treatment tank 4 in the electrodeposition coating process, the mounting portion 22 is lowered by the elevating portion 23 and the automobile body 7 mounted on the mounting portion 22 is immersed in the processing liquid W. At this time, the inclination angle of the mounting portion 22 is adjusted by operating the front and rear hoists 230 in the elevating portion 23. Then, the mounting frame portion 223 and the connecting frame portion 222 of the mounting portion 22 and the automobile body 7 enter the processing liquid W from the inlet portion 401 of the processing tank 4 in a state where the front side is inclined, and then the front and rear hoists By the operation of 230, the main body portion 402 of the processing tank 4 is returned to the parallel state.

  In addition, the transport vehicle 2 is caused to travel while adjusting the inclination state of the mounting portion 22, and the mounting portion 22 on which the automobile body 7 is mounted passes through the processing liquid W. At this time, the side surface of the traveling unit 21 of the transport vehicle 2 is in contact with the upper roller portion 51 of the rotating body 5, and the side surface of the upper frame portion 221 in the mounting portion 22 of the transport vehicle 2 is the lower roller portion of the rotating body 5. 52 is contacted. Then, the entire rotating body 5 including the upper roller unit 51 and the lower roller unit 52 rotates following the traveling of the traveling unit 21 driven by the drive source 211.

In addition, a driving force for causing the traveling unit 21 to travel by the drive source 211 is transmitted to the mounting unit 22 by the rotation of the rotating body 5, and the mounting unit 22 is directly driven. And the mounting part 22 can be driven without using a separate drive source and without using electrical control, and the structure of the whole conveying apparatus 1 can be simplified.
Thereafter, the side surface of the traveling portion 21 is separated from the upper roller portion 51, and the side surface of the upper frame portion 221 of the mounting portion 22 is separated from the lower roller portion 52. The mounting frame portion 223 and the connecting frame portion 222 of the mounting portion 22 and the automobile body 7 are inclined so that the rear side is lowered by the operation of the front and rear hoists 230 in the elevating portion 23. To the outside of the processing liquid W.

As described above, in the transport apparatus 1 of this example, even when the mounting unit 22 and the automobile body 7 are subjected to flow resistance due to the processing liquid W in the processing tank 4, the mounting unit 22 is directly driven to drive the mounting unit 22. Can be prevented from being pushed backward by the flow resistance of the processing liquid W.
Therefore, according to the transport apparatus 1 of the present example, even when the mounting unit 22 and the automobile body 7 are subjected to flow resistance due to the processing liquid W in the processing tank 4, the transport vehicle 2 is caused to travel without significantly limiting the traveling speed. be able to.

  In this example, the conveyance device 1 in which each conveyance vehicle 2 is continuously immersed in the treatment tank 4 along the guide rail 6 is shown. In addition to this, as shown in FIG. 4, it is also possible to employ a batch-type transport device 1 in which each transport vehicle 2 sequentially advances, descends the mounting portion 22, advances, raises the mounting portion 22, and advances. In this case, when the transport vehicle 2 moves forward to the front of the processing tank 4 and is positioned above the processing tank 4, the mounting unit 22 on which the automobile body 7 is mounted is lowered by the lifting unit 23, 22 and the automobile body 7 are immersed in the treatment liquid W in the treatment tank 4. And when the traveling part 21 of the conveyance vehicle 2 travels, the traveling part 21 and the mounting part 22 can be caused to travel in synchronization by the rotating body 5. The mounting unit 22 is lifted and lowered by the lifting unit 23 while the traveling unit 21 and the mounting unit 22 are separated from the rotating body 5.

  Further, the treatment tank 4 is a dip tank (immersion tank) that performs degreasing, surface adjustment, etc. as a coating pretreatment with chemicals in addition to an electrodeposition treatment tank for performing electrodeposition coating with the treatment liquid W. It is also possible to use a dip tank that performs cleaning with a cleaning liquid.

DESCRIPTION OF SYMBOLS 1 Conveyance apparatus 2 Conveyance vehicle 21 Traveling part 211 Drive source 22 Mounting part 23 Lifting part 3 Conveying rail 4 Processing tank 42,43 Side wall surface 5 Rotating body (synchronous traveling means)
51 Upper roller portion 52 Lower roller portion 6 Guide rail 7 Automobile body (object to be processed)
W treatment liquid

Claims (5)

When a plurality of transport vehicles are continuously traveled along the transport rail, the transport vehicle is configured to travel while immersing an object to be processed mounted on the transport vehicle in a processing liquid stored in a processing tank. A transfer device,
The transport vehicle is driven by a drive source and travels along the transport rail, a mounting unit that is suspended from the travel unit and on which the workpiece is mounted, and is disposed in the travel unit. An elevating part for raising and lowering the mounting part,
On the side wall surface of the processing tank or the side wall surface in the factory where the processing tank is provided, when the workpiece passes through the processing liquid, the mounting unit suspended from the traveling unit, A conveying device characterized in that a synchronous traveling means for traveling in synchronization with the traveling speed of the traveling unit is provided.   The conveying apparatus according to claim 1, wherein the synchronous traveling unit is provided on the side wall surface above the liquid surface of the processing liquid. The synchronous traveling means is rotatably provided on the side wall surface, and an upper roller portion that contacts the side surface of the traveling portion and a lower roller portion that contacts the side surface of the mounting portion suspended from the traveling portion are concentric. It is composed of rotating bodies arranged in a shape,
3. The rotating body according to claim 1, wherein the rotating body is configured to run in synchronization with the traveling unit by rotating in accordance with traveling of the traveling unit. Conveying device.   In the processing tank, on the side wall surface opposite to the side wall surface on which the synchronous traveling means is provided, when the traveling unit travels, a guide rail that guides the lifting position of the mounting unit by the lifting unit. It is provided, The conveying apparatus as described in any one of Claims 1-3 characterized by the above-mentioned.   The object to be treated is an automobile body, and the treatment liquid stored in the treatment tank is a chemical for performing pre-painting treatment, a washing liquid for washing, or electrodeposition coating for the automobile body. It is a coating material, The conveying apparatus as described in any one of Claims 1-4 characterized by the above-mentioned.

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