JP3107894B2 - Transfer device for liquid treatment - Google Patents

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 liquid processing, and more particularly, to sequentially applying various processes such as degreasing, washing, and electrodeposition coating to an object to be coated on an automobile body or an electric appliance coating line. The present invention relates to a transfer device used when performing processing using a liquid such as water on a processing object in the middle of the transfer path while transferring the processing object on a processing line as in the case.

[0002]

2. Description of the Related Art Conventionally, in a painting line for an automobile body, various home appliances, steel furniture, etc., first, a pre-coating treatment such as degreasing, washing or chemical conversion treatment is performed on an object to be treated such as an automobile body. Next, a coating process such as an electrodeposition coating is performed, and a process of causing water or other various liquids to act on the surface of the workpiece, such as a cleaning process after the electrodeposition coating, that is, a liquid process is performed.

In such liquid processing, liquid processing is performed, for example, by immersing the object in a liquid storage tank for storing the liquid, or spraying the liquid in a state where the object is surrounded by a wall. It is necessary to send the object to be processed, that is, into the liquid processing tank. Since the liquid processing tank is provided at a position different from the transport path of the workpiece, the workpiece is sent from the transport path to the liquid processing tank, and the workpiece after the liquid processing is transported from the liquid processing tank to the transport path. A mechanism is required to return to.

In the so-called immersion coating method such as the electrodeposition coating described above, depending on the shape of the object to be treated, it is not possible to perform sufficient treatment only by immersing the object in a treatment liquid in a liquid treatment tank. There are cases. This is because, when a three-dimensional processing object is immersed in the processing liquid, an air pocket called an air pocket is generated inside the processing object, and the processing liquid cannot contact the processing object in this portion. For example, if such an air pocket is formed in the electrodeposition coating process, the portion is naturally not coated, and a coating defect occurs. In the case where a liquid is applied to an object to be processed in a spray state as in the case of spray coating, there may be a case where the spray liquid cannot sufficiently reach the inside of the object to be processed depending on the arrangement of the spray gun.

In order to solve such a problem, it has been conceived to swing an object to be processed in a liquid processing tank. If the object is swung, the air accumulated in the internal space can easily escape, so that the air pocket can be eliminated. Further, if the posture of the object to be processed changes, the spray liquid also reaches a place where it could not reach before. As described above, transfer of the workpiece between the transport path and the liquid processing tank,
As a transfer device capable of swinging an object to be processed in a liquid processing tank, a transfer device described below has been conventionally proposed in the above-described coating line and the like.

Japanese Patent Application Laid-Open No. 1-172596 discloses an apparatus using a hanger lift. That is, a plurality of processing tanks are installed below a transport path on which a conveyor or the like is laid, and a pair of hanger lift devices is installed for each processing tank. By moving the hanger containing the object to be processed from the transport path to the hanger lift device, and simultaneously raising and lowering the pair of hanger lifts, the object to be processed is sent to and pulled from the processing tank, and the pair of hanger lifts is separated. By moving the workpiece up and down, the workpiece can be swung.

Further, as another transfer device, there is a transfer device provided with a self-propelled hoist which lays a rail along a transfer path of an object to be processed and runs on the rail. With this self-propelled hoist, an object to be processed is raised and lowered and sent to a liquid processing tank installed below the transport path, and an object to be processed is taken out of the liquid processing tank. A traveling mechanism driven by a motor or the like is incorporated in the hoist, and the workpiece can be freely transported by the hoist running on a rail by itself. It has also been considered that one workpiece is hung by a plurality of hoists, and the plurality of hoists are alternately moved up and down so that the workpiece can be swung.

[0008]

However, the above-described prior art transfer apparatus has a problem that the transfer apparatus is complicated and large, and requires a large installation space. First, in an apparatus using a self-propelled hoist, since the hoist itself is provided with a motor and a driving mechanism, the structure becomes complicated, and the weight and volume are increased. Since a plurality of such self-propelled hoists are required for each object to be processed, the self-propelled hoist, and the rails and rails for suspending the hoists must be used on the entire transport path that handles multiple objects to be processed simultaneously. The support structure becomes extremely large. Further, it is very difficult to control the traveling and lifting / lowering operations of the plurality of self-propelled hoists, and the control operation and the management of the operation state are troublesome.

Further, the self-propelled hoist that has moved to the end point of the transport path needs to be returned to the starting point again, so that it becomes a return path for the self-propelled hoist in addition to the forward rail along the transport path. It is necessary to install a return rail. The outgoing rail and the going-back rail form a continuous loop, so that the self-propelled hoist can travel freely between the going-rail and the going-rail. There is. As described above, a large-sized self-propelled hoist having a complicated structure is used, and moreover, a plurality of self-propelled hoists are integrated with one workpiece to be run on a loop-shaped rail. In order to avoid collision between the reciprocating self-propelled hoists, increase the distance between the outgoing rail and the return rail, and adjust the curvature of the rail so that the drive wheels of the self-propelled hoist can change direction smoothly. Must be quite large. In particular, at both ends of the going-back rail and the going-back rail, it is necessary to change the direction by 180 ° in order to transfer to the other rail, and the radius of curvature of the rail at this portion becomes very large. As a result, the installation area of the rail, that is, the area occupied by the transfer device becomes very large, and the equipment cost and the land cost of the entire transfer device increase.

[0010] In an apparatus using a hanger lift,
It is necessary to fix and install a pair of hanger lifts outside the processing tank for each processing tank, which increases the installation cost of the hanger lift and increases the installation area. In addition, if a hanger lift is installed adjacent to the processing tank, installation of various facilities and piping in the processing tank and work in the processing tank will be hindered. In addition, the processing object can be raised and lowered only at the place where the hanger lift device is installed.The design line of the processing line is changed or remodeled. However, it cannot be easily handled, and the installation work of the hanger lift device must be performed one by one.

Therefore, an object of the present invention is to provide a transfer apparatus in which an object to be processed is moved up and down from a transfer path to a liquid processing tank and the object to be processed can be swung, as described above. It is an object of the present invention to provide a liquid processing transfer device which can have a simplified structure, requires a small installation space, and can easily cope with a change in a transfer route or a vertical position.

[0012]

According to another aspect of the present invention, there is provided a liquid processing transfer apparatus including a liquid processing tank below a transfer path of an object to be processed. In a liquid processing transfer device provided with means for oscillating an object to be processed while being fed to the liquid processing apparatus, the object to be processed is shared and held, and each of them is independently raised and lowered A plurality of hanging elevating means, and a traveling path on which each of the hanging elevating means freely travels, the traveling path is a processing traveling path along a conveyance path of the workpiece, and a side of the processing traveling path. A return travel path installed in the vehicle, a movable travel path that reciprocates between the both travel paths at both ends of the processing travel path and the return travel path, and includes a processing travel path and a return travel path, respectively. Equipped with moving means for hanging and lifting means That.

The basic structure of the transfer apparatus for liquid processing is the same as that of a conventional transfer apparatus for liquid processing as described in the above-mentioned prior art. That is, in the above-described electrodeposition coating line, as in the case of sequentially performing degreasing, rinsing, and electrodeposition coating steps, a single or a plurality of liquid processing tanks required in each processing step are provided below the transport path of the workpiece. It is installed in. When performing necessary processing while moving the processing object along the transport path, the workpiece is sent from the transport path to a lower liquid processing tank, and when the processing in the liquid processing tank is completed,
The workpiece is raised and returned to the transport path.

The liquid processing tank includes a storage tank for storing a processing liquid,
The specific structure and the content of the processing performed therein can be freely set as long as the processing of the object is performed in a fixed space such as a spray booth provided with a spraying device. It is also possible to incorporate processing steps other than the liquid processing step, such as a drying step and a heating step, into the transport path. In these processing steps as well, in the same manner as in the liquid processing step, the processing may be performed after the object to be processed is moved to the lower part of the transport path by using the lifting / lowering means, or the transport or the processing may not be hindered. For example, the processing may be performed with the transport path unchanged.

According to the present invention, a plurality of suspension elevating means are provided as means for holding the object to be processed, which are shared and held at four corners of the object to be processed. The object to be processed may be directly held by the hanging elevating means, or, in a state where the object to be processed is accommodated in a holding member such as a transport table, a transport hanger, and a transport basket, the holding member may be suspended by the elevating means. You may make it hold | maintain. As the suspending elevating means, a wire or an arm for detachably holding an object to be processed or its holding member is attached so as to be able to ascend and descend by a driving mechanism such as a motor, and a so-called hoist structure can be applied.

In order to stably hold the object to be processed and to facilitate the swinging operation, it is preferable that the four corners of the object to be processed be suspended and lifted by the hanging means. . However, depending on the shape and structure of the object to be processed, the object to be processed can be held at locations other than the four corners, or can be shared and held at three or five or more locations. The suspension elevating means is attached so as to freely travel along the traveling path. The traveling path may have the same structure as the traveling path in various transporting devices, as long as the traveling path can be movably supported by the suspension elevating means, such as a traveling rail made of H-shaped steel. The suspension elevating means is supported on the traveling path via wheels or the like, and can travel freely on the traveling path. Instead of wheels, a sliding mechanism using rollers or balls, a sliding support mechanism using magnetism or fluid,
It may be supported so that it can run. However, the hanging elevating means itself is not provided with a motor or other drive mechanism for moving the hanging elevating means. That is, free travel means that the suspension means can be run by applying an external force to the suspension elevating means, and is attached to the travel path.

The plurality of suspending / lifting means may be configured such that all the suspending / lifting means are integrally connected and move at the same time, or the plurality of suspending / lifting means may be connected to several suspending / lifting means. Each lifting means may be divided so that it can be moved separately, or each hanging lifting means may be moved separately.

The traveling path includes a processing traveling path and a returning traveling path. The processing travel path is provided along the transport path of the workpiece, and is used when the workpiece held by the suspension elevating means is sequentially sent to each liquid processing tank. The return travel path is installed on the side of the processing travel path, and is used to return the suspension elevating means having finished transporting the workpiece to the starting point side of the transport path.

In the processing travel path, if a pair of travel rails are arranged in parallel, and the lifting means are suspended by the respective travel rails, the workpiece can be mounted on the left and right travel rails. It can be stably held by the hanging lifting means. The processing travel path can be formed with an arbitrary length and path according to the arrangement of the liquid processing tank, the arrangement of the processing equipment in each processing step, and the procedure of the processing operation. A curved portion or an inclined portion may be provided in a part of the processing travel path.

When the processing path is composed of a pair of parallel paths, the return path may be provided on both sides of the left and right processing paths. If both ends of the return travel path are arranged at positions close to both ends of the processing travel path, in the middle thereof, the return travel path may be separated from the processing travel path or take another route. Is also good.

The movable travel path is provided at both ends of the processing travel path and the return travel path, and one end of the movable travel path is
A reciprocating operation is performed between the state arranged at the end of the processing path and the state arranged at the end of the return path adjacent to the processing path, with the hanging and lifting means attached. It is supposed to. If the ends of the processing path and the return path are aligned in parallel, moving the movable path in parallel and arranging it at the ends of both paths is simpler and requires less installation space. Not preferred. However, the movable traveling path may be turned and arranged at the ends of both traveling paths. As a reciprocating device for the movable traveling path, a reciprocating device in a normal mechanical device such as a pinion gear mechanism driven by a motor, a crank mechanism, a cylinder mechanism, or the like can be used.

As the moving means of the suspension elevating means provided on the processing traveling path and the returning traveling path, ordinary moving means employed in various known transporting devices and the like can be applied. Specifically, it is preferable to use a device such as a shuttle conveyor or a chain conveyor that can simultaneously send a large number of hanging elevating means attached to a traveling path in a certain direction. The moving means starts the movement toward the processing travel path or the return travel path from the stage where the suspension elevating means is on the movable travel path, and the movable travel path on the opposite side from the processing travel path and the return travel path. The movement is stopped at the stage when the operation is moved to. For this reason, the moving means is configured to be able to cancel the start of the transmission of the driving force to the suspension elevating means at both end positions. The moving means may operate independently on the processing traveling path and the return traveling path, and therefore, moving means having different structures can be employed for each traveling path. Specifically, the moving means on the processing travel path is configured to perform intermittent movement control in which movement between each liquid processing tank and stop at the position of the liquid processing tank are alternately repeated. In the return travel path, the hanging and lifting means only needs to be quickly returned to the starting point of the transport path, so that intermittent movement control is not required.

In order to operate the lifting / lowering means,
It is necessary to supply power from outside, for example, by supplying power to a motor mounted on the suspension elevating means. Power supply means, for example, a power supply line, may be installed continuously over the entire length of the processing travel path, but power is supplied only when the lifting / lowering means comes to a predetermined position such as a liquid processing tank. As described above, if power supply means, for example, a power supply point, is provided only at a necessary place, power supply equipment is simplified and maintenance and management are easy. Further, the lifting operation of the hanging elevating means may be controlled by an operation panel or a switch provided for each hanging elevating means, but the supply of power to a plurality of hanging elevating means and the control of the elevating position are controlled. If the control is performed collectively by a control means such as a central control device installed at a place different from the processing travel path, the operation control of the entire transport line can be performed efficiently and safely.

[0024]

The object to be processed is shared and held, and a plurality of hanging and elevating means, each of which independently moves up and down, holds the object to be processed. , The workpiece is moved up and down in a stable state,
When multiple hanging lifting means are raised and lowered separately,
The so-called swing can be performed by tilting the posture of the object to be processed.

As described above, the plurality of suspending elevating means for sharing and holding the object to be processed are moved along the transport path from the starting point to the end point, and the suspended conveying means which has reached the end point are again moved. To use it, you need to send it back to the starting point. In the present invention, a processing path and a return path are separately provided as a path of the suspension lifting / lowering means, instead of a loop-shaped path as in a conventional transport device. And the return travel path are connected by a movable travel path that reciprocates. As a result, it is sufficient if there is enough space at both ends of the travel path for the short movable travel path to reciprocate, so that the installation area of the travel path can be significantly reduced.

Further, in the present invention, the suspension elevating means itself does not have self-propelled means such as a drive motor for traveling, but is provided with moving means on each of the processing travel path and the return travel path. Therefore, the structure of the suspension elevating means is simplified, and the control and management of the moving means are also facilitated. If the structure of the suspension elevating means is simplified, the external shape is reduced, and the weight is reduced, the load on the traveling path is reduced, and a simple structure is sufficient. It is necessary to provide a sufficient space between the processing travel path and the return travel path so that the suspended lifting / lowering means running on each other do not collide with each other. The space between the processing travel path and the return travel path can be narrow, and the installation space of the entire travel path can be reduced. The traveling path for processing, which requires the intermittent movement of the lifting / lowering means, and the return path, which does not need to be moved and which requires rapid movement, adopt moving means suitable for each. It is also possible to operate the lifting means in an optimal state.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows the overall structure of the transport device. A plurality of liquid processing tanks 10 are installed side by side, and the processing target A is sequentially sent into these liquid processing tanks 10 to perform various kinds of processing. Above the liquid processing tank 10, a processing rail 20 serving as a processing travel path is laid. A hoist 30 serving as a hanging elevating means is attached to the processing rail 20. The two hoists 30, 30 arranged front and rear along the processing rail 20 are connected to the connecting member 33.
Are connected together. A carrier 40 is suspended from the hoist connection 3, and the workpiece A is placed on the carrier 40. By raising and lowering the carrier 40 with the hoist 30, the workpiece A remains as the carrier 40.
It is lowered into the liquid processing tank 10 or raised.

FIG. 1 shows the structure of the entire moving path of the hoist 30. A pair of processing rails 20, 20 formed of H-section steel are installed in parallel at regular intervals,
A pair of front and rear hoists 3 are attached to each processing rail 20.
A hoist connection body 3 including 0 and 30 is attached. Each hoist 30 is hung on the processing rail 20 by a freely rotating wheel 32, and can be freely moved along the processing rail 20 by applying an external force to the hoist 30 or the hoist connection 3. The hoists 30 may not be connected to each other and may be moved simultaneously by applying an external force separately.

The hoist link 3 is attached to each of the left and right processing rails 20, and a total of four hoists 30
The suspension wires 41 attached to the four corners of the carrier 40 are suspended by the respective suspension hooks 31.
That is, one workpiece A is divided into four hoists 30
Will be held in a shared manner. By moving the two hoist linked bodies 3 along the respective processing rails 20, the transfer table 40 and the workpiece A are transferred. 4
If the hanging hooks 31 are raised and lowered in the same manner using the hoist 30 of the table, the transfer table 40 and the processing object A are raised and lowered in a parallel state. However, if the height of the hanging hooks 31 is changed depending on the position by raising or lowering the front and rear or left and right hoists 30 only in one direction or in the opposite direction, the transfer table 40 and the workpiece A are inclined. Will be. Therefore, by controlling the elevation of the four hoists 40 and alternately changing the inclination directions of the transfer table 40 and the workpiece A, the workpiece A can be swung in an arbitrary pattern.

On the outside of the pair of processing rails 20, return rails 2 serving as return travel paths are provided at intervals.
2, 22 are provided. It is sufficient that the interval between the return rail 22 and the processing rail 20 is large enough that the hoist connection 3 passing through the adjacent rails 20 and 22 does not contact. Processing rail 20 and return rail 2
2 are provided linearly in parallel with each other.

At both ends of the processing rails 20, 20, and the return rails 22, 22, movable rails 24, 25 serving as movable traveling paths are provided. Movable rails 24, 25
Is a relatively short rail that is slightly longer than the wheel interval of the hoist connection body 3. The movable rails 24, 25 extend from the position where one end is connected to the processing rail 20 to the position where the one end is connected to the return rail 20.
A reciprocating operation mechanism including a motor, a rack and pinion, and the like is incorporated so that the whole 5 can move in parallel. The hoist connection 3 moved to the end of the processing rail 20 is
After the transfer to the movable rail 25 connected to the processing rail 20, the movable rail 25 is replaced with the return rail 22, and the hoist connection body 3 is connected to the return rail 22.
Can be transferred to The transfer of the linked hoist 3 from the return rail 22 to the processing rail 20 can be similarly performed using the movable rail 24. Movable rail 24, 2
The specific structure of the mechanism for reciprocating operation 5 is the same as that of a device generally called a traverser or the like.

The linked hoist 3 transports the workpiece A from the upstream side to the downstream side of the processing line.
The processing rail 20 moves in a fixed direction (solid arrow direction), and the return rail 22 moves in the opposite fixed direction (dotted arrow direction). Next,
A mechanism for moving the connected hoist 3 in a certain direction by the processing rail 20 or the return rail 22 will be described.

The processing rail 20 is provided with a shuttle conveyor. Specifically, left and right processing rails 20,
Between them, a strip-shaped shuttle 50 having a length up to the processing rail 20 and the movable rails 24 and 25 at both ends is provided. As shown in FIG. 5, the shuttle 50 is driven by a motor 56 and a rack and pinion mechanism 55, and reciprocates in the horizontal direction. This shuttle shuttle 5
A large number of pusher claws 51 are attached to both side ends of the pusher 0, and the pusher claws 51 push the pushing pieces 36 formed on a part of the hoist coupling body 3 to move the hoist coupling body 3. The pair of hoist linked bodies 3 attached to the left and right processing rails 20, 20 move completely synchronously.

FIG. 3 shows the relationship between the pusher claw 51 and the pushing piece 36. The hoist 30 is provided with wheels 32, 32, which carry the processing rail 20 made of H-shaped steel from both sides, and which run on the lower sap, and guide rollers 37, 37 which contact and guide both ends of the lower sap. A rod-shaped pushing piece 36 that is provided and protrudes to both sides is provided. At a position adjacent to the pushing piece 36, the shuttle 5
A pusher claw 51 of 0 is arranged.

As shown in detail in FIG.
Reference numeral 1 is attached so as to be pivotable about a pivot 52. On the side surface of the shuttle 50, a cylinder 53 that is operated by pneumatic or hydraulic pressure is installed. This cylinder 5
The tip of the third retractable piston is rotatably connected to the upper end of the pusher claw 51. The cylinder 53 itself has a rear end portion rotatably attached to a side surface of the shuttle 50. The lower end of the pusher claw 51 protrudes below the shuttle 50 and is arranged at a position where it abuts on the pushing claw 36 of the hoist 30. Therefore, in this state, if the shuttle 50 operates in the direction of the white solid arrow in FIG.
The pushing claw 36 of the hoist 30 is pushed, so that the hoist connector 3 moves.

After the hoist connection 3 has moved by a certain distance, the shuttle 50 operates in the direction of the white dotted arrow in FIG. 4 to return to the original position. At this time, if the piston is extended by operating the cylinder 53, the pusher claw 51
Pivots, and the lower end of the pusher claw 51 jumps upward, and enters the state shown by the two-dot chain line in FIG. In this state,
Even when the pusher claw 51 passes through the position of the push claw 36 of the hoist 30, the pusher claw 51 does not collide with the push claw 36, so that the return operation of the shuttle 50 can be performed smoothly and the hoist 30 is returned. Nor.

When the shuttle 50 is reciprocated in this manner, the linked hoist 3 moves intermittently along the processing rail 20 by a fixed distance. If the moving distance of one cycle by the shuttle 50 is set to an interval from one liquid processing tank 10 to the next liquid processing tank 10, the position of each liquid processing tank 10 is changed every time the linked hoist 3 moves. Will be transported. Of course, it may be set so that the linked hoist 3 is moved to the next liquid processing tank 10 by the operation of the shuttle 50 in a plurality of cycles.

In the above embodiment, the pusher pawls 51 are operated by the cylinders 53 provided on the respective pusher pawls 51. However, a plurality of pusher pawls 51 are collectively combined by combining various link mechanisms and gear mechanisms. Can also be activated. Next, FIG.
Shows a mechanism for moving the linked hoist 3. The illustration of the processing rail 20 is omitted for easy understanding.

An endlessly rotating chain conveyor 60 is installed above the left and right return rails 22 and the movable rails 24 and 25. A pusher rod 62 projecting downward is attached to the chain conveyor 60.
When the pusher bar 62 comes into contact with the pushing claw 36 attached to a part of the hoist connection body 3, the pushing claw 36 and the hoist connection body 3 are pushed and moved along the return rail 22. . In addition, since only the pusher rod 62 projecting downward is attached to the chain conveyor 60, the curvature of the direction change portion at both ends and the width of the entire loop can be reduced, and the chain conveyor 6 can be narrowed.
There is no concern that the “0” overhangs outside the return rail 22. If the loop of the chain conveyor 60 is set up and down, or if it is set inside the return rail 22, it can be prevented from projecting outside the return rail 22 at all.

It is necessary to intermittently move the hoist connection 3 on the processing rail 20 for each processing step, but the return rail 22 quickly moves the hoist connection 3 on the processing start side. It is preferable to move the chain conveyor 60 to the hoist connector 3
May be continuously moved from the movable rail 25 to the opposite movable rail 24 via the return rail 22. In this manner, the hoist connection 3 does not stay on the return rail 22, and the number of hoist connection 3 installed on one transport line can be reduced.

The operation of the transfer device having the above-described structure will be described. At the left position in FIG. 2, the four corners of the carriage 40 are hung on the respective hoists 30 with the left and right hoist linked bodies 3, 3 arranged on the respective processing rails 20, 20. The workpiece A is placed on the substrate. The shuttle 50 is reciprocated to move the hoist connection 3 intermittently. Hoist connection 3, ie, workpiece A
However, when it comes above the liquid processing tank 10, the operation of the shuttle 50 is stopped, and each hoist 30 is operated at the same time.
The workpiece A is lowered into the liquid processing tank 10. Workpiece A
In the liquid treatment tank 10, an appropriate treatment is performed. At this time, out of the four hoists 30, only the hoist 30 of the hoist connector 3 on one side is slightly moved up and down,
In each hoist connection 3, the front and rear hoists 30, 30 are moved up and down in a predetermined range in the opposite direction, and the carrier 40 and the workpiece A are swung.

When the processing in each liquid processing tank 10 is completed, each hoist 30 is operated to level the transfer table 40 and the workpiece A, and then each hoist 30 is simultaneously raised to perform liquid processing. The workpiece A is lifted from the tank 10. While the object A is being lifted from the liquid processing tank 10 or after the object A has been lifted, the above-mentioned swing operation is performed by lifting and lowering the hoists 30.
It is also possible to promote the discharge of the processing liquid accumulated in the inside. Thereafter, the shuttle 50 is operated again to move the connected hoist assembly 3 to a position above the next liquid processing tank 10. By repeating such an operation, the processing target A is subjected to a predetermined processing in each liquid processing tank 10.

After the predetermined processing steps are completed, the workpiece A and the carrier 40 are removed from the four hoists 30..., So that the left and right hoist joints 3 can be handled separately. Then, as shown at the right end of FIG. 1, the movable rail 25 is moved from the position of the processing rail 20 to the position of the return rail 22 in a state where the hoist connection body 3 is moved to the left and right movable rails 25.

The linked hoist 3 mounted on the movable rail 24 moved to the position of the return rail 22 is mounted on the opposite movable rail 24 from the movable rail 25 via the return rail 22 by the operation of the chain conveyor 60. It is moved to the state where it is done. The hoist connection body 3 mounted on the movable rail 24 is such that the movable rail 24 is
After moving to the position of, by the operation of the shuttle 50,
It is sent to the processing rail 20 again. If the hoist connection body 3 is aligned with the left and right processing rails 20, a series of liquid processing steps are performed from the suspension mounting of the carrier 40 and the workpiece A in the same manner as described above.

[0045]

According to the transfer apparatus for liquid treatment according to the present invention described above, the traveling path of the suspension elevating means is
Dividing the processing path and the return path, and connecting the movable path back and forth between them, the area occupied by the path can be small, and the overall size of the transfer device can be reduced or the installation space can be reduced. Can be planned.

Further, since the suspension elevating means itself is not provided with a driving mechanism, the structure of the suspension elevating means is simple and small, and accordingly, the structure of the traveling path can be simplified. In addition, if the suspension elevating means is small and lightweight, the movable traveling path can be small, and the reciprocating drive thereof can be facilitated. By simply driving and controlling the moving means of each of the processing travel path or the return travel path, a large number of suspended lifting / lowering means can be simultaneously moved and controlled, compared to providing a driving mechanism for each suspended / elevating means. Drive control can be performed much more efficiently, and centralized control by the central control means can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a structure of a traveling road in an embodiment of the present invention.

FIG. 2 is a side view showing the entire transfer apparatus.

FIG. 3 is an enlarged sectional view of a main part showing a related portion between a hoist and a shuttle conveyor.

FIG. 4 is a schematic explanatory view showing an operation mechanism of the shuttle conveyor.

FIG. 5 is a schematic side view showing a drive mechanism of the shuttle conveyor.

FIG. 6 is a schematic perspective view showing an operation mechanism of a hoist in a return rail.

[Explanation of symbols]

 A Workpiece 20 Processing rail 22 Return rail 24 Movable rail 30 Hoist (hanging lifting / lowering means)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-172596 (JP, A) JP-A-2-217495 (JP, A) JP-A-63-143117 (JP, A) JP-A-4- 63297 (JP, A) Japanese Utility Model Showa 62-141072 (JP, U) Japanese Utility Model Showa 54-129517 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) C25D 13/00 304 B65G 49/04 C25D 17 / 00,17 / 06,19 / 00

Claims (2)

(57) [Claims] A liquid processing tank is provided below a transfer path of an object to be processed, and the object to be processed is sent from the transfer path to the liquid processing tank to be processed by a liquid. In the transporting device for liquid processing provided with a means for causing the liquid to be processed, a plurality of hanging elevating means that share and hold the object to be processed, each of which is independently raised and lowered, and a traveling path on which each of the hanging elevating means travels freely. The traveling path includes a processing traveling path along the transport path of the object to be processed, a return traveling path installed beside the processing traveling path, and both ends of the processing traveling path and the returning traveling path. It consists of a movable travel path that reciprocates between both travel paths, and the processing travel path and the return travel path include:
Each of the transporting apparatuses for liquid treatment, further comprising a moving unit for hanging and lifting means. 2. The liquid processing transfer device according to claim 1, wherein a plurality of sets of suspending and lifting means are provided on the transfer path of the object to be processed, and central control for collectively controlling the operations of the plurality of sets of suspending and raising and lowering means. A transfer device for liquid treatment comprising means.