JPH06102173B2 - Conveying device for coating process with automatic process - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an automatic machine process transfer device and the same transfer method. More specifically, the present invention relates to an automatic machine process transfer apparatus and a method for transferring an object to be transferred by a transfer apparatus, and providing an automatic machine process for applying coating to the transferred object by an automatic machine in the middle of the transfer apparatus.

(Prior Art) Conventionally, as an automatic machine process transfer apparatus and method for transferring an object to be transferred by a transfer apparatus and providing an automatic machine process for applying a coating on the transferred object by an automatic machine in the middle of the transfer apparatus, , Various devices or methods are known. It is also known that an object to be conveyed having different coating conditions such as a difference in size of a coated surface is conveyed by a conveying device to perform coating and drying including coating by an automatic machine. In this case, it is conceivable to adjust the discharge amount of the automatic machine for each transported object so as to deal with the transported object under different coating conditions. However, it is not easy to change and adjust the discharge amount of the automatic machine while stabilizing it. Therefore, in general, there is a method in which the discharge amount of the automatic machine is kept constant and the so-called tact of the conveying device is changed.

For example, in the conventional example shown in FIG. 4, the transfer device (31)
(Conveyor in this conventional example) The speed of the whole is constant, and the object (32) (in this conventional example, an automobile body) is conveyed. (33) is an automatic machine, that is, an automatic paint spraying machine, and (34) is a coating booth in which the automatic machine is installed. An outlet and an inlet of the object to be transferred (32) are provided in the middle of the transfer line, and the whole is hermetically sealed. Set in a shape. The tact can be changed by setting the interval between the transfer devices (31) to a variable pitch.

As another conventional example, an automatic machine process transfer device shown in FIG. 5 is known. In this conventional example, the automatic machine (33)
It is possible to move in the reciprocating direction along the transfer direction of the transfer device (31) in the coating booth. And automatic machine (3
By changing the moving speed of 3), the moving speed relative to the transfer device (31) is made constant, and the coating conditions of the automatic machine (33) for each transferred object (31) are made constant. Is.

(Problems to be Solved by the Invention) However, in the conventional example shown in FIG.
All the processes of (3) are operated at a constant speed, and each transported object (32) is attached to the transportation device (31) at intervals according to the working time of the automatic machine. Therefore, when the pitch between the transported objects (32) is first determined, the length of each process is determined, and the interval between the transported objects (32) is wider than that of the other transported objects (32). A case arises. Therefore, at a place where the interval between the conveyed objects (32) is long even if the tact down is performed, the worker waits for the conveyed objects (32) to arrive, so that the worker is in a non-working state for a long time, resulting in work loss. There is a problem that man-hours cannot be reduced.

Further, depending on the transported object (32), the fixed position stop position changes, which causes a problem that the working zone of the operator is unclear and a problem that the automatic machine stops in the middle of coating.

And when something happens inside the automatic machine (33) (mini bell), when you need to clean the inside, or when you need to empty the inside of the automatic machine (33) to look inside, like when you take a break. If all the objects (32) to be transported in the coating booth (34) have not been carried out, open the inside of the coating booth (34) and use the automatic machine (33)
The inside cannot be inspected, and if you open it with the entrance control if you open it, the automatic machine (33) (minibell) all the objects (32) to be conveyed in the painting process in the previous process will be defective. Had.

The conventional example shown in FIG. 5 is excellent in that it is made from the point of view of changing the relative speed, but there is a problem that the operating range space of the automatic machine (33) is required, and tact fluctuation. If the difference is large, there is a problem that the amount of movement of the device becomes large, a problem that electrostatic interference occurs, a problem in safety of cleaning, and if an abnormality occurs in the previous process, the automatic machine will be in the middle of painting. There was also the problem of stopping, and in the first place there was the problem that the installation of automatic machines was expensive.

On the other hand, the inventor has found that the quality of the coating of the transported object is obtained not by merely the interval between the transported objects attached to the transported object but by controlling the coating time by the automatic machine and the speed of the transported object. I found out. That is, on the basis of continuously conveying the entire conveyer at a constant pitch, it is impossible to prevent dust from being generated by conveying only one conveyed object fast or slow. Also, as long as one factory and one line are presupposed, it is meaningless even if the speed of the conveyance body is increased, because the amount will not be sufficient. On the other hand, even if the conveyance body is moved midway, if the speed is returned to the original value, the conveyance amount is constant and the quality can be secured.

(Means for Solving the Problems) The present invention comprises a plurality of conveyors that are sequentially installed along a transfer line that conveys an object to be conveyed, and that each surface is provided with a plurality of pushers for fixing the object to be conveyed. , The pitch of the pushers of both conveyors located upstream and downstream across the automatic machine process that paints the transported object by the automatic machine installed in the middle of the transfer line, the pitch of the pushers of the downstream conveyor is , The conveyor has a fine pitch compared to the pusher pitch of the upstream conveyor, and the conveyor installed upstream and downstream of the automatic machine process consists of variable speed conveyors, and the automatic machine sets the coating conditions in advance to the planned maximum value. And a conveyor for a coating process having an automatic machine process, characterized by comprising an automatic machine set according to the driving speed of the conveyor.

(Function) Since the coating conditions of the automatic machine in the automatic machine process part are set according to the driving speed of the conveying device set in advance to the planned maximum value, the speed of the conveyor before and after the automatic machine process part is variable, Since each conveyed object is always coated by the automatic machine under the constant coating conditions of the automatic machine, and the conveyors other than the automatic machine process part have variable speeds, the entire line is affected by the conveying speed of the automatic machine process. Works without

Furthermore, the conveyor is composed of a conveyer having a pusher for fixing the conveyed object, and the pitch of the pusher on the downstream side across the automatic machine process is a fine conveyor as compared with the pitch on the upstream side. Since the transport speed is set to the planned maximum value, even if the conveyor of the automatic machine process is faster than the speed of the transport device of other processes, the pitch of the pushers on the downstream side is finer than the upstream side There is no delay in the transport of the transported object on the downstream side of the machine process.

Furthermore, the coating conditions of the automatic machine of the automatic machine process part are set according to the preset drive speed of the transfer device,
In the transporting method for the coating process having the automatic machine process, which is characterized in that the speed of the transporting device before and after the automatic machine process portion is variable, the entire line is not affected by the transport speed of the automatic machine process, Operate.

Furthermore, the coating conditions of the automatic machine of the automatic machine process part are driven at a speed set according to the preset drive speed of the conveyor device, and the speed of the conveyor device before and after the automatic machine process part is variable, Fix the interval of the transported objects fixed to the pushers on the downstream side across the automatic machine process so that it is narrower than the interval of the transported objects fixed to the pushers on the upstream side across the automatic machine process. In the coating process transport method having an automatic machine process characterized by that, even if the interval between the upstream and downstream pushers of the automatic machine is constant,
Even when the transport device in the automatic machine process is driven at a speed higher than the speed of the transport devices in other processes, the transported object is frequently transported due to the narrow interval between the transported objects. There is no delay in the transport of the transported object on the side.

Furthermore, in the transfer method for the coating process having the automatic machine process described above, when the transfer speed of the transfer device for the automatic process is set to the planned maximum value, the transfer for the automatic process is performed even if the speed of the transfer device is increased. The speed of the device does not fall below the conveying speed of the conveying device on the upstream side of the automatic machine process, and the object to be conveyed is not delayed before the automatic machine process.

(Embodiment) FIG. 1 is a front view of a first embodiment of the present invention. (1
1) is a transfer line. The carrying line (11) is a car body carrying line in this embodiment. (12)
Is a coating booth installed in the middle of the transfer line (11). The coating booth (12) is of a hermetically sealed structure having an outlet and an inlet through which an automobile body can pass, respectively on the upstream side and the downstream side. Inside the coating booth (12), in addition to the manned work place (13) where the worker performs painting work, an automatic machine process is provided, and an automatic machine (14) is installed there. The automatic machine (14) can adjust the discharge amount, and can also apply the adjusted constant discharge amount of the paint at regular intervals or every time a signal indicating that it should be applied is received. It is an automatic painting machine. (15), (16), and (17) are conveying devices. The carrying device (15) is a carrying device for an automatic machine process,
(16) is a transfer device provided upstream of the automatic machine process, and (17) is a transfer device provided downstream of the automatic machine. Conveyor (1
In this embodiment, 5), (16) and (17) are chain conveyors. Conveyor equipment for automated machinery processes (15)
The transport speed of is set to the maximum planned value in the transport line (11). The planned maximum value may be reset before driving the transport line.

On the conveyor, a large number of pushers (19) are installed, which are to be conveyed (18), in this embodiment, an automobile body is locked or fixed and is driven when the conveyor is driven. In this embodiment, the pusher (19) has a finer pitch on the downstream side of the automatic machine process, as compared with the upstream side pitch. When the pitch of the pusher on the downstream side and the pitch on the upstream side of the automatic machine process are the same, the transported object (18) does not get stuck on the downstream side of the conveyor device (15) for the automatic machine process during transportation. , The pushers (19) are provided at intervals such that the pushers (19) are fixed to the pushers and are transported, and the transport device (16) on the upstream side of the automatic machine process.
The object to be conveyed (18) is fixed at a distance.

In the embodiment shown in FIG. 1, the downstream side of the automatic machine conveying device (15) is exposed from the downstream side of the coating booth (12) and further extends downstream. The downstream side of the transfer device (16) provided upstream of the automatic machine process is provided up to the front of the automatic machine process.

Next, the operation of the embodiment shown in FIG. 1 will be described. When the line is operated, the transfer device (15) for the automatic machine process is driven at a constant speed according to the coating conditions of the automatic machine (14) to transfer the object to be transferred (18). The transport devices (16) and (17) on the upstream side and the downstream side of the automatic machine change the speed according to the production capacity and the like.

The pitch of the pusher (19) of the downstream side transport device (17) across the automatic machine process is set to be finer than the pitch of the pusher (19) of the upstream side transport device (16). At this time, even if the transfer device (15) of the automatic process is faster than the transfer devices (16) and (17) of other processes, the pusher (19) of the transfer device (17) on the downstream side is used.
The pitch of the pusher (1
Since it is finer than the pitch of 9), it is sequentially conveyed, and the conveyance of the conveyed object (18) is not delayed at the conveyance device (17) on the downstream side of the automatic machine process.

Also, the pitch of the pusher on the downstream side across the automatic machine process and the pitch on the upstream side are set to the same pitch, so that the object to be transferred (18) does not get stuck on the downstream side of the transfer device (15) for the automatic process during transfer. When the pushers (19) are installed at intervals such that the pushers (19) are fixed to the pushers and are transported, the upstream transport device (16) of the automatic machine process is fixed to the downstream transport device (17). By fixing the object to be conveyed (18) at an interval larger than that of the object to be transferred (18), the object to be transferred (18) transferred from the transfer device (15) for the automatic machine process is an automatic machine. The transport device (17) on the downstream side of the process sequentially transports without delay.

FIG. 2 shows an embodiment in which the carrying device (15) for the automatic machine process is a separate body and the upstream and downstream carrying devices for the automatic machine process are integrated as the carrying device (20). In this case, it is not necessary to synchronize both transfer devices (16) and (17). Second
In the embodiment shown in the drawing, the conveyor device (15) for automatic machine process
The downstream end is between the inside of the coating booth (12), but it may be extended outside the coating booth. By lengthening the transfer device (15) for the automatic machine process, even if the transfer device (20) is stopped, the transferred object (18) during the coating work inside the automatic machine (14)
Can be placed on the transfer device (15) outside the automatic machine (14) after completion of the automatic painting work.

In the embodiment shown in FIG. 3, the downstream end of the transfer device (15) for the automatic machine process is set to the exit of the coating booth. In this case, the carrier inside and outside the booth can be separated.

(Effect of the Invention) Therefore, in the present invention, it is not necessary to change the coating conditions in the automatic machine process even if the conveyor speeds in the upstream and downstream of the automatic machine process change. Therefore, the tact can be freely changed, the automatic machine process is not affected by the work delay in the previous process, and the quality can be stabilized. In addition, it is possible to open the inside of the automatic machine process at any time when there is an abnormality in the automatic machine (mini bell), and it is possible to minimize the occurrence of defective products due to opening. The fixed position stop position does not change depending on the transported object. It is possible to reduce the number of man-hours in the work processes performed by the workers other than the automatic machine process by changing the speed of the transfer device other than the automatic machine process to reduce the tact time. Further, since the transfer device in the automatic machine process is separated from other transfer devices, it is possible to reduce the positional change due to the extension of the chain.

[Brief description of drawings]

1, 2 and 3 are front views of an embodiment of the present invention,
4 and 5 are front views of a conventional example. (14) ... Automatic machine, (15), (16), (17) ... Conveyor,
(18)… Conveyed object, (19)… Pusher

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-153016 (JP, A) JP 62-109726 (JP, A) Practical application JP 61-22295 (Publication Sho 62-132785) Of the detailed description and drawings attached to the application

Claims (1)

[Claims] 1. A plurality of conveyors, each of which has a plurality of pushers for fixing an object to be transferred, and which is installed in the middle of the transfer line. The pitch of the pushers of both conveyors located upstream and downstream, across the automatic machine process that coats the conveyed objects with the automatic machine, is the pitch of the pushers of the downstream conveyor is the pitch of the pushers of the upstream conveyor. In addition to having a finer pitch than the pitch, the conveyor installed upstream and downstream of the automatic machine process consists of variable speed conveyors, and the automatic machine adjusts the coating conditions to the conveyor drive speed set in advance to the planned maximum value. A conveying device for a coating process having an automatic machine process, characterized by comprising a set automatic machine.