JP2593380B2 - Work supply method by self-propelled carriage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying a work using a self-propelled vehicle, wherein the work is transferred between a work setup location and a plurality of processing stations using a self-propelled vehicle.

[0002]

2. Description of the Related Art Conventionally, a work setup place and a plurality of machining stations are arranged along a loop-shaped trajectory. Although it is known to transfer workpieces, providing such a loop-shaped track deteriorates space efficiency. Therefore, as shown in Japanese Utility Model Laid-Open No. 2-94051, a setup place and a plurality of processing stations are used. Are connected by a non-loop-shaped track, and a self-propelled truck on the track is reciprocated between a setup location and each processing station to transfer a work. In this apparatus, the trolley is moved to a predetermined processing station where processing is to be completed next among a plurality of processing stations, and is made to stand by, and when the processing is completed, the work processed in the predetermined processing station is paid out to the trolley. Then, the carriage is moved back to the setup place to pay out the work to a predetermined position of the setup place, and the carriage receives the work to be processed next, and then moves the carriage to the predetermined processing station. Then, the next work is put into the station.

[0003]

In the above-described apparatus, the work can be paid out to the bogie immediately after the machining is completed.
After that, the bogie is moved back to the setup location to transfer the workpiece, and the bogie is moved back to the processing station to load the next workpiece into the station again. The time required for the reciprocating movement of the truck and the delivery of the work at the setup place is a loss time, and the work efficiency of the work supply is deteriorated. In view of the above points, an object of the present invention is to provide a method capable of efficiently performing a work supply operation using a bogie that is self-propelled on a non-loop-shaped orbit.

[0004]

In order to achieve the above object,
According to the present invention, a work setup place and a plurality of processing stations are connected by a non-loop-shaped trajectory, and work is transferred between the setup place and these processing stations by a bogie that runs on the track. In the method, at least two trolleys are provided on a track, and one trolley is moved to a predetermined processing station of a plurality of processing stations which next finishes processing, and the other trolley is placed at a setup place. The next work to be processed at the predetermined processing station is received, and at the end of the processing, the work processed at the predetermined processing station is paid out to the one bogie, and then the one bogie is removed from the predetermined processing station. While moving to the evacuation area, the other carriage is moved to the predetermined processing station, and the next work is thrown into the predetermined processing station. Characterized in that it.

[0005]

Next, by letting one of the carts stand by at a predetermined machining station where the machining is completed, the work can be immediately discharged to the one cart after the machining is completed. In order to receive the next work at the place in advance, after the work is paid out, the next work can be put into the processing station simply by moving one bogie to the evacuation place and simultaneously moving the other bogie to the processing station. Unlike the technique, it is not necessary to move the carriage to the setup place after the work is dispensed, and to transfer the work, thereby shortening the time required for the work supply work. By the way, when the track is composed of only one trunk line, the order of the two carts cannot be changed, and therefore, after the next work is put into the processing station from the other cart, the two carts are removed. It is necessary to return to the setup place, pay out the processed work paid out from the processing station to one of the bogies to the setup place, and then move the one bogie to the processing station where processing is completed next. If the time difference of the work cycle between the processing stations is short, the one carriage cannot be moved to the next processing station to finish the processing before the processing is completed, which may cause a loss time. On the other hand, if the track is configured to have a main line and a branch line branched from the main line, the work is discharged from the processing station to one of the bogies, and then the one bogie is retracted to the branch line portion, and the other bogie is used. During the work input operation by moving the trolley to the processing station, one of the carts can be returned to the main line and moved to the setup place. As a result, the order of the two carts can be exchanged, and the other cart, which has been emptied by inputting the work to the machining station, is moved to the machining station where machining is completed next, and one of the carts is set at the setup place. The carriage can receive the next work, and can be prepared for the next work supply operation.

[0006] If an abnormality occurs in another processing station before the end of the processing in the predetermined processing station where the processing is completed next and it is necessary to replace the work in the other processing station, the predetermined processing is performed. Moving one of the carts waiting at the machining station to the other machining station, dispensing the work from the other machining station to the one cart, and adding the other machining to the other cart at the waiting location. After receiving the next work to be processed at the station and retracting the one bogie from the other processing station, it is considered that the other bogie is moved to the other processing station and the next work is input. However, in order for the other truck to receive the work for another processing station, the work for the predetermined processing station already mounted on the carriage is required. Drop-off does not have to be carried out transshipment of work is, it takes time and effort to the work. In this case, a third carriage that runs on the track is provided, and when an abnormality occurs in another processing station before the completion of the processing in the predetermined processing station, the other carriage is evacuated from the setup place. Moving the third bogie to the setup place to receive the next work to be processed at the other processing station, and throwing the next work into the other processing station by the third bogie; This eliminates the need to reload the work on the truck, thereby improving work efficiency. Further, even if the third bogie is not provided, if the other bogie is made to receive the next work after the completion of the machining at the predetermined machining station, the other bogie is received before the completion of the machining at the predetermined machining station. When an abnormality occurs in one of the processing stations, the other truck can immediately receive the work for the other processing station, and the work efficiency can be improved by eliminating the need to reload the work.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, reference numeral 1 denotes a work setup location, and a track 3 for connecting a plurality of processing stations 2 indicated by A, B, and C to the setup location 1 in a straight line is provided. Using the first and second two trucks 4 ₁ , 4 ₂ running on the track 3,
The transfer of the work between the processing station 2 and the setup place 1 is performed according to the following procedure.

That is, the processing status of all the processing stations 2 is monitored by the controller, and when it is determined that the processing station 2 to finish the processing is the A station, the processing shown in FIG. as shown in), the first carriage 4 ₁ causes wait go to a station, in setup location 1 to the second carriage 4 ₂ were allowed received the next workpiece to be processed by the a station, at the time of processing completion, FIG.
As (b), the to payout the work that has been processed by the A station to the first carriage 4 _1. Next, as shown in FIG. 1 (c), along with moving the first carriage 4 ₁ to the retracted location of the side of the A station, by moving the second carriage 4 ₂ A station, the second carriage 4 ₂ The next work is put into the A station from. Thereafter, as shown in FIG. 1 (d), by moving the first carriage 4 ₁ and the second carriage 4 ₂ to setup location 1, the predetermined setup location processed workpiece from the first carriage 4 ₁ Payout to the position and one work supply operation are completed.

[0009] Also next time processing station 2 to end the processing is determined to be the station B or C, for transferring the workpiece in the same procedure as above, but in this case the second carriage 4 ₂ B or upon movement of C to the station, to move the first carriage 4 ₁ herein as stations or between B and saving location between stations C of a and B.

FIG. 2 shows another embodiment, in which a track 3 includes a linear trunk line 3a connecting the setup place 1 and the processing station 2 at A, and the processing stations 2 at B and C, respectively. Each branch line 3b is connected to the trunk line 3a.
Each of the carts 4 ₁ and 4 ₂ can freely enter and exit between the trunk line 3a and the branch line 3b via a turntable 5 provided at a branch portion of the branch line 3b.

[0011] Work in this embodiment, when the processing stations 2 which then terminates the processing is A station, the first carriage 4 ₁ on standby to A station as shown in FIG. 2 (a) at the time of processing ends the following was paid out, the first carriage 4 _1, as shown in FIG. 2 (b), to move the branch line 3b for B station here as the saving location, a second carriage 4 ₂ a station in this state Go and move the next work which has received the pre-setup location 1 to the second carriage 4 ₂ was added to a station, a first carriage 4 ₁ when this is turned to setup location 1 is returned to main line 3a Then, the processed work is paid out to the setup place. Then, the second carriage 4 _2, after work-up of the A station, as shown in FIG. 2 (c), with on standby moves to the next exit the machining example B station, the first carriage 4 ₁ in setup location 1 were allowed received the next workpiece to be machined in B station, to payout the machined workpiece by the second carriage 4 ₂ B station after the machining end. Then, as shown in FIG. 2 (d), the second carriage 4 ₂ moves portions of branch 3b for partial or C station A station side of the main line 3a here as the saving location, a first carriage in this condition 4. Move ₁ to the B station to load the work. Then, the second carriage 4 ₂ moves to the setup location 1 when this is turned on, while the first
After work-up of the carriage 4 ₁ to B station, Figure 2
As shown in (e), the process moves to the C station where the processing is completed next, and the second bogie 4 ₂ is set at the setup place 1.
Processed in dispensing and C stations machined workpiece from perform the transfer to the second carriage 4 ₂ of the next workpiece, C
Prepare for work supply to the station.

According to an embodiment of the manner 2, using alternately the first carriage 4 ₁ and the second carriage 4 ₂ and turned carriage and dispensing carriage by replacing the order, the work The supply operation can be performed efficiently, and it is possible to cope with the case where the time difference of the operation cycle between the processing stations is short.

In the above embodiment, each processing station 2
About the case where the machining at
Specified processing station to finish processing next
An error occurs at another processing station 2 before the processing at 2 ends.
To generate the other processing prior to the predetermined processing station 2.
Work must be delivered at processing station 2
May disappear. In this case, the table that exists in setup location 1
Machining station 2 for finishing machining on the car as described above
Before finishing the machining at the machining station 2.
If you let me receive it, an abnormality at another processing station 2
At the time of occurrence, the work for another processing station is
It has to be replaced, which takes time. This
In response to this, make the bogie receive the workpiece after machining
Then, for example, in the embodiment of FIG.
At the B station before finishing the processing at the A station
When an abnormality occurs, the second carriage 4 in the setup place 1_Two
Can immediately receive the work for station B
The first truck 4 that was completed and was waiting at Station A ₁To B
Move to the station and the first truck 4₁B station for
The second bogie while paying out the work from the
4_TwoTo the vicinity of the B station, and the first bogie 4₁
After evacuating from station B, the second truck 4_TwoImmediately
To work station B
Work can be quickly performed
You.

Further, even in the case where the work existing in the setup place 1 is to receive the workpiece before the end of machining, a third carriage 43 which runs on the track 3 as in the embodiment shown in FIG. ₃ is provided. By doing so, it is possible to quickly perform work delivery work in the event of an abnormality. Hereinafter the delivery procedure of the work in this embodiment, the second carriage 4 ₂ A station in setup location 1 causes to wait first carriage 4 ₁ A station to terminate the following process as shown in FIG. 3 (a) A case will be described as an example in which an abnormality occurs in the B station in a state where a work is received. First, as shown in FIG. 3 (b), along with retracting the branch line 3b serving as a second carriage 4 ₂ the saving location of the abnormality only in the vicinity of the setup location 1 example setup location 1,
The third carriage 4 ₃ which had been waiting in the waiting location side of the setup location 1 Move to setup location 1 was received work for B station, the first carriage 4 ₁ in parallel with this to payout the work from the first carriage 4 ₁ to B station moves to the B station. Next, as shown in FIG. 3 (c), with retracted from the first carriage 4 ₁ B station performs the insertion of the workpiece by moving the third carriage 4 ₃ B station.
Then, the work from the first carriage 4 ₁ moves to the setup location 1 B station when this is turned payout, then, as shown in FIG. 3 (d), the first carriage 4 ₁ as truck for abnormal move wait waiting position, while the third carriage 4 ₃ a
While moving to the station, the second bogie 4 ₂
Return to “a” and prepare for the delivery of the work at the A station.

[0015]

As is apparent from the above description, according to the first aspect of the present invention, after completion of machining at each machining station, the bogie receiving the machined work is returned to the setup place and the work is delivered. Even if the work is not performed, the next work can be put into the processing station by another bogie, and the work supply work can be performed efficiently by eliminating the loss time required for the work delivery work at the setup place. According to the second aspect of the present invention, the order of the carts is exchanged, and the cart used for the previous work input is moved to the machining station where the machining is finished next without returning to the setup place, and is used as the cart for unloading the workpiece. Even if the time difference of the work cycle between each processing station is short, there is a loss time due to the delay of the delivery cart arrival at each processing station. According to the third and fourth aspects of the present invention, even if an abnormality occurs in another processing station before the end of the processing at the next processing station, the work supply operation can be performed without any trouble. This has the effect that the work can be quickly delivered to another processing station.

[Brief description of the drawings]

FIGS. 1 (a), 1 (b), 1 (c), and 1 (d) show a work supply procedure according to a first embodiment of the present invention.

FIGS. 2 (a), (b), (c), (d), and (e) are diagrams showing a work supply procedure according to a second embodiment of the present invention.

FIGS. 3 (a), (b), (c) and (d) are diagrams showing a work supply procedure at the time of abnormality according to a third embodiment of the present invention.

[Explanation of symbols]

1 Setup place 2 Processing station 3 Track 3a Trunk line 3b Branch line 4 ₁ , 4 ₂ , 4 ₃ bogie

Claims (4)

(57) [Claims] 1. A work setup place and a plurality of processing stations are connected by a non-loop-like trajectory, and a work vehicle running on the trajectory transfers a work between the setup place and these work stations. In the method, at least two trolleys are provided on a track, one of the plurality of processing stations is moved to a predetermined processing station to finish processing next, and one of the trolleys is moved to a standby state. Receiving the next work to be processed at the predetermined processing station, paying out the work processed at the predetermined processing station to the one bogie at the end of the processing, and then removing the one bogie from the predetermined processing station. And the other carriage is moved to the predetermined processing station, and the next work is transferred to the predetermined processing station. A work supply method using a self-propelled bogie characterized by loading. 2. The self-propelled vehicle according to claim 1, wherein the track is configured to have a main line and a branch line branched from the main line, and a portion of the branch line is used as the evacuation place. Work supply method. 3. A third bogie, which is self-propelled on the track, is provided. When an abnormality occurs in another processing station before the end of the processing in the predetermined processing station, the other bogie is moved from a setup place. Withdrawing, moving the third bogie to the setup location to receive the next work to be processed in the other processing station, and moving the one bogie to the other processing station to move the one bogie After the work is paid out from the other processing station, and then the one carriage is retracted from the other processing station, the third carriage is moved to the other processing station to transfer the next work to the other processing station. 3. The method according to claim 1, wherein the workpiece is supplied to a station. 4. A work setup place and a plurality of processing stations are connected by a non-loop-like trajectory, and a work vehicle running on the track performs delivery of the work between the setup place and these work stations. In the method, at least two trolleys are provided on a track, and one of the plurality of processing stations is moved to a predetermined processing station which finishes processing next, and one of the trolleys is put on standby. At the end of the processing, at the end of processing to pay out the work processed at the predetermined processing station to the one truck, and let the other truck receive the next work to be processed at the predetermined processing station at the setup location, Next, the one truck is moved to a retreat place off the predetermined processing station, and the other truck is moved to the predetermined processing station. The next work is put into the predetermined processing station, and if an abnormality occurs in another processing station before finishing the processing in the predetermined processing station, the one cart is transferred to the other processing station. Move to pay out the work from the other processing station to the one bogie, and make the other bogie receive the next work to be processed at the other processing station at the setup place, and move the one bogie to the A work supply by a self-propelled carriage, wherein after retreating from another processing station, the other carriage is moved to the other processing station and the next work is put into the other processing station. Method.