JPS5828070B2 - Pallet conveying device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic supply device for workpieces and jigs that is suitable for not only small-lot production of a wide variety of products but also mass production in the group management of machine tools for small and medium-sized products. .

Generally, in group management of machine tools, workpieces or jigs and tools are transported on pallets, but the most important thing in automatic pallet feeding equipment for group management is the main conveyor line for pallet transport. This means whether the water is flowing smoothly at each branch point.

In a conventional automatic pallet feeding device for group management, only one workpiece can be attached to one pallet because the pallet is used as a fixture for the workpiece.

Therefore, when a large number of the same workpieces are flown, one piece, one
Since pallets corresponding to individual workpieces are flown independently on the main conveyor line, the number of pallets on the main conveyor line increases, resulting in pallet congestion at branch points of the main conveyor line. death,
This meant waiting time for each station, and a special waiting station had to be set up.

The present invention provides a second transport conveyor which intersects with the transport conveyor of the first transport conveyor line 1 in order to automatically supply pallets to the machine tool when the traveling direction of the pellets on the main conveyor line is changed. In this conveying device, the first conveyor is buried so as to bridge the first conveyor with the second conveyor, which is pushed down to the bottom via the idle sprocket. Or, in order to avoid interference, an idle sprocket is installed on the first conveyor that overhangs the second conveyor, the chain is retracted, and the first conveyor is buried so as to bridge the second conveyor. The conveying device comprises: bringing the pallet conveyed from the first conveyor to a branching point of the second conveyor; This is an automatic pallet feeding device that can automatically change direction easily and reliably to the transfer conveyor side via a chain and tie drive device.

Embodiments of the present invention will be described in detail below, including the basic configuration of a machine to which the present invention is applied.

The main conveyor that controls the automatic feeding of pallets has the first conveyor 21 and the third conveyor 21 as long sides, and the second
It is a rectangular unidirectional moving conveyor line whose short sides are the conveyor 20 and the fourth conveyor 26, and manual, mobile, automatic, and numerically controlled machine tools 1 to 13 are installed in this rectangular main conveyor line. Place.

Among these, 1.2, 4, 5, 7, 8, 9, 13. The machine tools and the first transport conveyor 2γ include pallet pull-in conveyors 28 to 32 and pallet standby conveyor 28.
a.

28b, 28c, 28d to 32a, 32b (Figure 9-1)
The machine tools numbered 3, 6, 10, 11, and 12 and the third conveyor 21 are connected to pallet pull-in conveyors 22 to 25 and pallet pull-in conveyor 22a,
22b-25a, communicated by 25b.

Thus, for example, the machine tool 6 is connected to the third transport conveyor by means of a pallet drawing conveyor 24 and pallet waiting conveyors 24a, 24b.

Also, next to each machine tool, there is a setting display panel 34.・・・・・・
... 40, which allows the operator to directly instruct the computer about cutter offset, program changes, etc. needed when operating the machine.

Along the fourth conveyor 26, a jig storage shelf 16a is provided.
A stacker transport conveyor 18 and a stacker carry-in conveyor 19 are connected to the second transport conveyor 20.

A work pallet storage shelf 16 is disposed between the stacker carry-out conveyor 18 and the stacker carry-in conveyor 19, and a shuttle crane 1 is arranged between each work pallet storage shelf.
7 is movably provided.

This Shuftsuka crane 17 stores the work pallets that have arrived on the carry-in conveyor 19 in a storage rack, and uses a small electronic computer 42.
The pallet in the called storage shelf is carried out to the stacker carrying-out conveyor 18 according to the command.

Further, on the second conveyor 20, a work height detection device 20a for detecting the height of the workpieces stored on the pallet is installed between the connection points of the stacker loading/unloading conveyors 18 and 19.
will be established.

At the left end of the first transport conveyor 21, work pallets containing workpiece materials and jig/tool pallets containing jigs and tools are carried to the main conveyor, and work pallets that have been completely processed or used jig/tool pallets are transferred to the main conveyor. Connect the pallet dispenser conveyor 14.15 which discharges from the main conveyor.

Before and after the branch point between the first transport conveyor 21 and the pallet sender conveyor 15, a computer 42 is installed to determine whether the pallet is a pallet for fully processed workpieces, a pallet for unprocessed workpieces, or a pallet for jigs and tools. The interacting pallet conveyance pallet number reading device 117 reads the number of the pallet carried into the main conveyor line, and determines whether the pallet with the cargo number has been carried into the main conveyor line.
A pallet number reading device 115 that interacts with the computer 42 is provided to confirm whether the pallet number a of the octopus is correct.

Also, at the rear end of the first conveyor 27, should the pallet that has flowed through the first conveyor 2γ be put into the work storage shelf 16, or should it be sent to the machine tool on the third conveyor side for processing?

Or, since all processing has been completed, the electronic computer 42 is used to check whether the pallet dispenser conveyors 14 and 15 should be given 1.
A branching station 33 is provided which includes a pallet number reader for interaction with the pallet number reader.

At this branching station 33, when a pallet is being delivered from the stacker delivery conveyor 18 to the second transport conveyor 20, the pallet cannot be passed from the first transport conveyor 2γ to the second transport conveyor 20, so the pallet is temporarily placed on standby. In order to do this, evacuation devices LK, LJ, and LE are provided to float from the first conveyor 27.

Of the commands from the electronic computer 42, commands to the machine tool board are sent via the ink face control panel 203 of the machine tool, and commands to the conveyor are sent via the conveyor control board 41.

Furthermore, commands for the stacker crane are issued via the stacker crane control panel 203a.

The main parts of the embodiments of the present invention will be roughly divided and described as follows.

Work pallet Line/on-machine/in-machine out setting display panel Line/off branch station Work pallet storage shelf Work pallet In one embodiment of the present invention, all workpieces are transferred to the second station.
This is carried out by storing the work in a box-shaped container work pallet 43 as shown in the figure.

There is no limit to the shape of the workpieces to be accommodated on the workpiece pallet 43 as long as they are within a predetermined height and do not exceed the sides of the pallet, and a plurality of workpieces can be accommodated depending on the size.

Furthermore, the work pallet 43 can also accommodate jigs and tools for machining the work.

A pallet number display board 44 is attached to the side wall of the work pallet to display the pallet number as shown in Fig. 4 (Fig. 3), and the pallet number of the work pallet traveling on the main conveyor is shown below. It is read by the pallet number reading device 4γ which will be explained.

In addition, in the embodiment of the present invention, the number assigned to identify the pallet is 10 as the work pallet number.
The number is 899-1, and the jigs and tools are numbered in the 900s.

Further, the pallet number reading device 47 is a photoelectric reading device consisting of a light emitter 48 and a light receiver 49 as shown in FIG.

Hereinafter, all pallet number reading devices used in group management of machine tools according to the present invention are those shown in FIG. 3.

Line-off (hereinafter pallets of an embodiment of the invention) [Input/output conveyor 14.15
will be explained in detail according to the drawings.

In Figures 5-1 and 5-2, 15 is the base 1
18 is a pallet dispenser conveyor that can be raised and lowered via rollers 120 along guide rails 119 attached to the pallet conveyor.

The pallet dispenser conveyor 15 is raised and lowered by the base 118.
The cylinder 102 attached to the link machine tHO3
, 104, a lever 12 with a roller is rotated through the lever 12.
1.

The pallet dispenser conveyor 15 is started via a reducer 106 that reduces the rotational speed of the electric motor 105 and a chain wheel attached to the output shaft of the reducer.

14 is at the end of the pallet dispenser conveyor 15,
This is a finished product pallet delivery conveyor connected to the pallet dispenser conveyor 15.

Pallet dispenser conveyor 15 and pallet discharge conveyor 1
4, the pallet is carried out from the pallet dispenser conveyor 15 by the pallet carrying fork 108 which reciprocates along the guide rail 122 by the cylinder 10γ as shown in FIG. The finished product is moved on the carry-out conveyor 14 and carried out to the finished product carry-out port 123.

The other end of the pallet dispenser conveyor 15 intersects with the first transport conveyor 27, forming a pallet dispenser branch point 101.

The limit switch 112 provided at the pallet dispenser branch point 101 stops the carrying-out operation of the pallet dispenser conveyor 15 after confirming that the pallet carried out by the pallet dispenser conveyor 15 has reached the pallet dispenser branch point 101. This is a switch that allows you to

113 is a pallet number reading start limit switch provided on the first conveyor 2γ, and 114 is a pallet number reading start limit switch provided on the first conveyor 2γ.
This is a knot number reading release limit switch.

As mentioned above, 115 is a pallet number reading device that reads the number recorded on the pallet number display board 44 attached to each pallet.

Reference numeral 117 is a photoelectric pallet number reading device like the one described above, and when a pallet moving on the first conveyor 27 presses the pallet number reading start limit switch 116, the pallet number reading device 117 starts reading the number recorded on the pallet number display board 44.

The pallet dispenser conveyor according to one embodiment of the present invention is constructed as described above and operates as follows.

In the conveyor system of the present invention, the jig and tool pallets and workpiece pallets flow on the transport conveyor, so the jig and tool pallets containing the jigs and tools are given a specific number (900 series) as described above. The work pallets that house the workpieces are numbered from 010 to 899 in size.

In the following explanation, the operation in which a work pallet containing work materials or a pallet containing jigs and tools is carried from the pallet drawer conveyor 15 to the first transport conveyor 27 will be referred to as "line on", and will be referred to as "line on", The operation in which a work pallet for which processing has been completed or a used tool pallet is carried out from the first conveyor 27 to the pallet sender conveyor 15 is referred to as "line off."

First, when a work pallet or a tool pallet containing work materials is placed on the pallet dispenser conveyor 15, an operator presses a line-on start button on an operation panel (not shown).

At this time, the emitter 110 and the receiver 1 shown in FIG. 5-1
If another pallet is traveling on the first conveyor 2γ between 11 and 11, line-on start will not occur.

This is to prevent the pallet that is about to be carried in and the pallet that has flowed on the first conveyor 2γ from interfering at the pallet drawer branch point.

Furthermore, "line on" does not start until the advancing pallet passes the floodlight 110.

When line-on starts, the cylinder 102 is actuated, valves the link mechanisms 103 and 104, the lever with roller 121 turns, and the pallet dispenser conveyor 15 is raised.

Next, the electric motor 105 rotates to operate the pallet dispenser conveyor 15 toward the first conveyor 27 via the speed reducer 106 .

When the pallet on the pallet dispenser conveyor 15 begins to enter the pallet dispenser branch point 101, the pallet blocks the light emitted from the projector 110.

When the pallet blocks the light, the first conveyor 21, which was operating in the direction of the arrow, stops at 1 inch.

The pallet dispenser conveyor 15 continues the carry-in operation, and when the pallet completely reaches the pallet dispenser branch point 101 and the limit switch 112 is pressed, the electric motor 105 is stopped and the pallet dispenser conveyor 15 stops the carry-in operation.

As soon as the loading/unloading conveyor 15 stops, the cylinder 1
02 operates in the opposite direction to the previous direction, and the pallet dispenser conveyor 15 descends.

Next, the first transport conveyor 27 starts operating again in the direction of the arrow to send the pallet to the pallet number reading device 115.

However, while the pallet that is about to enter the line is moving on the pallet sender conveyor 15 toward the pallet drawer branch point 101, another pallet is sent from the fourth conveyor 26 onto the first conveyor 27. Includes 1, floodlight 11
When the 0 light is blocked, the first conveyor 27 is stopped and priority is given to line-on.

The line-on pallet moves on the first conveyor 2γ in the direction of the arrow, leaves the limit switch 112, and then starts reading the pallet number with the limit switch 1.
13 is pressed, the pallet number reading device 115 starts reading the pallet number display plate 44, and when the pallet moves further and the pallet number reading release limit switch 114 is pressed, the reading by the pallet number reading device 115 is canceled.

The pallet number read by the pallet number reader 115 is sent to the electronic computer 42 (FIG. 1) as described below.
If an unsuitable pallet is placed on the line, it is removed from the first conveyor 2γ, and if a suitable pallet is placed on the line, it is removed from the first conveyor 2γ. 27 in the direction of the arrow.

The first conveyor 2 is connected to the magnetic drum of the electronic computer 42.
1. A file in which the numbers of pallets on the second conveyor 20, third conveyor 21, and fourth conveyor 26 are registered (hereinafter, this file will be referred to as a conveyor file).

), a file in which pre-scheduled machining processes for each workpiece material are registered, such as the order in which the pallets that are on the line go to each machine tool (hereinafter this file is referred to as a pallet file), and each machine tool. A file in which the machining order of the work pallets to be machined is registered (hereinafter referred to as the machine buffer file) and the pallet number of the pallet to be lined off after all machining processes are completed are registered. file (hereinafter referred to as the line-off file),
A file (hereinafter, this file will be referred to as a line-off completion file) is provided in which all pallet numbers of pallets that have been line-off are registered.

When the pallet number that has just been brought on line is read by the pallet number reader 115, the number is immediately transmitted to the computer 42, and it is checked whether the read pallet number is correct.

If an incorrect pallet number is read, e.g.
This may occur if you make a mistake in setting the palette display board.

The work pallets are numbered from 10 to 899/1, and the tool pallets are numbered in the 900 range.

Further, if the read pallet number is less than number 10, an error message is displayed and the pallet is removed from the first conveyor 2γ.

If the pallet number is in the 900s, the pallet flows on the first conveyor 2γ and is not processed in the computer 42 as described below.

Next, in order to register the pallet number that was brought in a long time ago in the conveyor file, it is checked whether there is an empty address in the conveyor file where the pallet number can be registered, and if there is no empty address, This means that a pallet exceeding the capacity of the fourth conveyor 21 has been placed on the line, so an error message is displayed and the pallet is removed from the first conveyor 21.

If there is space, the pallet number of the pallet that came on line is registered.

Furthermore, since all the pallet numbers of pallets to be processed on that day have already been stored in the pallet file in the electronic computer 42, it is checked whether the pallet number of the pallet that has come on line is registered in the pallet file.

If it is not registered, an error message will appear and the pallet will be removed from the first conveyor 2γ.

If it is registered in the pallet file, it is checked whether a call command is included in the machine tool number for machining the first process of the workpiece stored on the pallet.

There is a condition that the workpiece material of the work pallet that is placed on the line must be processed in a predetermined process order from the first process, and that it is registered in the pallet file for the first time when the pallet is placed on the line. Since a call command is entered in the machine tool number of the first process, if a call command is already entered in the machine tool number of the first process, an error message will appear and the pallet will be removed from the first conveyor 27.

If the machine tool number of the first process does not contain a call command, the machine tool number of the first process contains a call command,
Next, the machine buffer file is checked to determine when the first run of the pallet on the line should be machined on the first run machine tool.

The machine buffer file contains the pallet number of the work currently being processed, the pallet number of the work to be processed next, and the pallet in the queue (the machine tool in one embodiment of this application). There is a place where the pallet number of a pallet (either a pallet being transported by a conveyor or temporarily stored on a storage shelf for processing) is registered, and when the pallet comes on line, the pallet number is registered.

Next, the machine buffer file is checked to see if there is an empty address for registering the pallet number again.
If there is no space, an error message will appear and the pallet will be removed from the first conveyor 27.

If there is an empty space, a pallet number is registered there.

Next, a check is made to see if the machine buffer file contains the pallet number of the workpiece currently being machined.

If there is no pallet number for the work currently being processed, it also means that there is no pallet number for the next work, so check whether there is a pallet number that contains a call command among the pallet numbers of the pallets in the queue. If a call command is included, the machine buffer file processing within the computer 42 is terminated.

If no call command is entered, the call command is entered at the first pallet number of the pallet numbers in the queue, and processing of the machine buffer file within the computer 42 during line-on is completed.

First, the machine buffer file has neither the pallet number currently being processed nor the pallet number for the next process, and the call command is not included in the pallet number of the waiting pallet. Since the pallet is not fully heated on the machine's pallet standby conveyor, and the next pallet to be processed by that machine tool has not been called out, it is necessary to call out the pallet number of the pallet in the queue. This is because it is not allowed.

At the above-mentioned stage of checking whether the machine buffer file contains the pallet number of the pallet currently being processed,
If there is a pallet number of the workpiece currently being machined, a check is made to see if the machine buffer file contains the pallet number of the next workpiece.

If there is a pallet number for the next workpiece, the pallet of the workpiece currently being machined and the pallet of the next workpiece are pulled into the pallet standby conveyor of that machine tool.
Since the pallet waiting conveyor is full, processing of the machine buffer file within the computer 42 during line-on ends.

If there is no pallet number for the next processing, a check is made to see if there is a pallet number containing a call command among the pallet numbers of the pallets in the queue registered in the machine buffer file.

If there is a pallet number that contains a call command, it means that the pallet waiting conveyor has not yet pulled in the next pallet, but the call has been delayed, so the line is on. Electronic computer at the time of 4
Processing of the machine buffer file within 2 ends.

In one embodiment of the present invention, the order of machining pallets in each machine tool is determined by instructions based on the program processing of the electronic computer 42, which will be described later, regardless of the order in which the pallet numbers of the pallets are registered in the machine buffer file. First, the workpieces on a series of pallets containing the same type of workpiece are machined, and only after that machining is completed are the workpieces on a pallet containing a different type of workpiece being machined. If there is no pallet number that contains a call command among the pallet numbers of the pallets in the queue, the pallet of the work currently being processed may be the last pallet in a series of pallets containing the same parts. It will be checked if it exists.

If the pallet currently being processed is the last pallet,
Since a work pallet containing parts of another type may be processed, a call command is entered at the first pallet number of the pallet in the machine buffer file queue, and the electronic computer 42 when the line is on. Processing of the machine buffer file within ends.

If the pallet of the workpiece currently being machined is not the last pallet, pallet number a of the pallet containing the same type of workpiece as the pallet currently being machined is searched among the pallet numbers in the queue of the machine buffer file. is issued, a call command is entered for that pallet number, and the machine buffer
The file is returned to the magnetic drum, all processing within the electronic computer 42 during line-on is now completed, and the pallet flows on the first conveyor 2γ.

Machine-in, Machine-out Machine-in is to feed the pallets on the main conveyor or work pallet storage shelf to the machine side according to the requirements of the machine tool, and the pallet pull-in conveyor plays its main role. fulfill.

Furthermore, machine out is when the workpieces on the supplied workpiece pallet have been processed and are carried out from the pull-in conveyor to the main conveyor.

Pallet pull-in conveyor 22. ...25,28. ...
32 is the first conveyor 27 and the third conveyor 21
This is to pull the work pallet being transported into the machine tool side.

The pallet pull-in conveyor 28 shown in FIG. 1 will be described in detail below by way of example.

The pallet drawing conveyor 28 in FIG. 9-1 is provided perpendicularly to the first conveyor 2γ and between the first conveyor 2γ and the machine tools 1, 2, 3, and is a standby conveyor 28a for pallets that has been folded. , 28b, 28c, and 28d are provided branching to the left and right, respectively, with the pull-in conveyor 28 in the center.

The pallet pull-in conveyor 28 is supported by a moving frame 359 as shown in FIG. 9-2, and as the moving frame 359 moves up and down, the pallet pull-in conveyor also moves up and down.

A roller 360 rotatably supported on both ends of the moving frame is connected to a guide rail 361 fixed to the base 35γ.
, the six-pack pallet conveyor 28 is moved up and down.

The output shaft of the lift cylinder 358 is rotatably provided on a bracket 363 fixed to the base 357. Base 35γ
Link 362' having roller 364 contacting the underside of
are connected, and the link 36 by the lift cylinder 358
2.352', the pallet drawing conveyor 28 is moved up and down.

Links 3621 for vertically moving the pallet pull-in conveyor 28 via the base 357 are provided at two locations on the base 351, and each link is connected by a connecting shaft 36γ as shown in FIG. 9-1.

Furthermore, the pallet pull-in conveyor 28 includes a speed reducer 366 and an electric motor 365, as shown in FIG. 9-2.

It is driven to travel by a drive system via a chain.

The process by which a work pallet is supplied to or discharged from a machine tool by the retracting pallet conveyor configured as described above will be described in detail.

On the pallet standby conveyor 28b, a pallet (P3) storing a workpiece currently being processed by the machine tool 2 is placed, and on the pallet standby conveyor 28a, a pallet P4 storing a workpiece to be processed next is placed. It will be placed.

Pallets P] and P2 for currently being processed or for next processing workpieces of the machine tool 1 are placed on the shredded pallet standby conveyors 28c and 28d, respectively.

The pallet PX which has just received the call command is placed near the pallet pull-in conveyor 28 in FIG. ,28...
One pallet number reading device 22e, 23e is always attached to each pallet number reading device 22e, 23e.

. . 28e exchanges signals with a computer), the first conveyor 2γ is stopped and the pallet drawing conveyor 28 is raised by the lift cylinder 358 and the link 362.

Therefore, the pallet PX waiting on the first conveyor 2γ
is delivered to the pallet pull-in conveyor 28, and is further driven by the electric motor 365 to be conveyed along with the chain conveyor in FIG.
-2, it is moved to the left.

When the pallet PX is completely loaded, the completion signal is transmitted to the computer 42 in FIG. 1.

The electronic computer 42 receives the signal and processes a preprogrammed schedule.

That is, (I) Check whether there is anything currently being processed by machine tools 1 and 2.

(n) Check whether the pulled-in pallet PX was actually called in the program.

(2) Enter the number of the pulled pallet 1Px on the computer 4.
Delete from the conveyor file in 2.

QV) In (I), when there is no workpiece pallet being machined, a command to call the pallet for machining next to pallet PX.

I do.

The explanations for each of the items (■), . . . (IV) above will be described in detail below.

Regarding (I), in order for each machine tool to operate without being idle, while the work pallet P1 currently being processed is waiting on the standby conveyor 28d, the pallet P2 for the next process is
It is necessary that the pallet is transported to the pallet standby conveyor 28c.

However, in reality, there are a large number of pallets flowing on the conveyor, and due to unscheduled interruptions, tool breakage, machine failure, etc., the pallet standby conveyor 28a.

28b, 28c, and 28d become empty and it is impossible to avoid idleness of the machine. Therefore, in the present invention, the machine buffer file of the electronic computer 42 is checked at the time when the called pallet PX is supplied to the machine. Check whether the pallet number of the work currently being processed is recorded.

If it is not recorded, the pallet PX is treated as the pallet P1 for the current workpiece, and the machine buffer file is processed so that machining can be started immediately, and in the case of an automatic processing machine, the machine buffer file is The predetermined machining data programmed into the computer is commanded to the machine.

If the box is recorded, check item (n) and if it is correct, the pallet PX will be considered as the pallet P2 for the next workpiece, and the pallet PX will be processed after the workpiece of the pallet P1 currently being processed is completed. Process the machine buffer file so that machining can begin.

Regarding (n), as mentioned in (I), it would be troublesome to call the palette PX without performing the palette call processing for the next work in the machine buffer file of the computer 42, so (■ ) items are checked.

In the present invention, the workpieces to be applied to each machine tool are
Since the computer 42 issues instructions while processing the pallet numbers written in the machine buffer file, it is necessary to confirm that there are no errors in the preprocessing before executing the processing.

Regarding (2), as described in the previous section Line On, the first conveyor 2
When the workpiece is placed on the line at 1, the pallet number is registered in the conveyor file of the computer 42 by the pallet number reading device.

Therefore, the pallet Px that received the call from machine tool 1
When the Px is transferred to the pallet drawing conveyor 28, Px must be deleted from the conveyor file.

Regarding (IV), if the pallet number of the workpiece currently being processed is not registered in (I), the workpiece on the brought in pallet Px will be processed immediately, so the computer 42
checks the pallet number registered in the machine buffer file and confirms the pallet number of the workpiece to be machined next to the workpiece on pallet Px.

In the present invention, the pallet number is the upper two of the three-digit number.
Digits indicate the type of part.

In other words, pallets with pallet numbers having the same upper two digits contain the same parts.

Furthermore, the first digit indicates the machining order; for example, if the same part is placed on the line with pallet numbers 510, 511, ..., 515, the machine tool will start machining part number 51. Then, all the palettes from 515 to 5101 are consumed at once.

That is, if the workpiece pallet currently being processed is 515, the next processing pallet 514 is called, and then 513, 512, .
...Call 510.

When the workpiece of pallet 510 is completed, the process of forming this part in the machine is completed.

In the machine buffer file, all pallet numbers of workpieces that are input to the main conveyor and instructed to be processed by machine tool 1 are registered each time, so as mentioned above, pallets containing the same parts have serial numbers. I don't know if it will be registered as such.

Therefore, the computer 42 examines the machine buffer file and determines the number Px of the subsequent pallet containing the same parts.
It is checked whether or not a is registered in the file, and if it is registered, a command to call the pallet number Pxa is issued.

If it is not registered, it waits at 1, which is registered.

During this time, once the machining of the pallet PX is completed, the machine tool becomes idle.

Furthermore, the electronic computer 42 reads the called pallet number Pxa.
The program handles all checks as to whether the item is on the conveyor, on the pallet storage shelf, or in the process of being stored.

If either of them exists, the pallet Pxa has been called to the machine tool 1, so it should definitely be carried into the machine tool 1.

If it does not exist, it will be an error and the operator will have to investigate the cause.

Next, the process of carrying out the work pallet will be explained.

Upon completion of machining of the work currently being machined housed on the pallet PX, the operator must issue an instruction to return the pallet PX to the first transport conveyor 2γ via the pallet pull-in conveyor 28.

At this time, the pallet conveyor 28 moves in the same manner as when carrying in the pallet/lot, but the only difference is the running direction of the drive chain.

When the unloading is completed, a completion signal is transmitted to the computer 42, and the computer 42 processes the schedule programmed in advance.

That is, (i) Call command for the next processing pallet PXb to be carried to the empty standby conveyor as the pallet PX is carried out (vI) It is confirmed whether the workpiece on the pallet PX to be carried out is a finished product or an unfinished product.

(W) If it is an unfinished product, decide where the pallet PX will go.

The explanation for each item on the (■, . . . side) will be explained in detail.

(Regarding ■, the number of the pallet Px conveyed to the first conveyor 2γ is
It is deleted from the file and registered in the conveyor file.

Among the pallet numbers registered in the machine buffer file, if there is a pallet Pxb whose workpiece is the same as the pallet PXa of the next workpiece of the workpiece of the pallet PX that was carried out, the pallet PXb immediately becomes the next workpiece of Pxa. When the workpiece is called as a pallet of the same part and there is only pallet PXb, which does not contain the same part, it must be checked whether pallet PXa is the last pallet of the same part.

If pallet Pxa is the last pallet of the same part, it is sufficient to call Pxb as the pallet number of a different part; if pallet 1Pxa is not the last pallet of the same part, it is sufficient to wait until it is registered in the machine buffer file.

In addition, the computer 42 checks the conveyor file or stacker file (described later) to confirm whether the pallet Pxb for next processing is currently on the conveyor or in the work pallet storage shelf, and also checks whether the pallet Pxb for next processing is currently on the conveyor or in the work pallet storage shelf. If it is on the shelf, the stacker crane 1γ is operated to command the pallet Pxb to be carried out.

Regarding (vI), when the pallet Px is conveyed to the first conveyor 2γ,
The electronic computer 42 checks the process details of the pallet PX registered in the pallet file, sets the machine number registered in the pallet file of the machine tool that has just been processed as the used number, and determines the machine tool for the next process. If so, register the pallet PX number in the machine buffer file for that machine number.

In addition, if there is no machine tool for the next process, the number of the pallet PX registered in the pallet file as a line-off, that is, a finished product, is used as the completion number, and the computer 42
line-off file.

Regarding (2), if there is a machine tool for the next process, the first conveyor 2γ, the second
The pallet Px travels on the transport conveyor 20, the third transport conveyor 21, and the fourth transport conveyor 26, or is stored in the work pallet storage shelf 16.

In addition, if all processes of the pallet PX are completed and the pallet Px is to be taken off the line, the pallet drawer conveyor 1
Return towards 5.

Setting display panel In the present invention, the material supplied to each machine tool is processed either by an operator according to drawing instructions (in the case of a manual machine) or automatically according to processing instructions from the computer 42. (In the case of automatic machines)

In this case, information that the worker wants to know (for example, the number of lofts of the material currently being processed, the number of the next loft, a number (sequence number, etc.) that indicates the content of the currently processed material), or Information you want to instruct (for example, correction of the contents of the loft number scheduled in advance, such as order number, after processing is completed, number of defects in processing, etc.)
In addition, many instructions (tool correction instructions, changes to pre-scheduled machining order, etc.) occur.

Exchange of this information must always occur through dialogue between the operator and the computer 42.

This action is also necessary when attaching and removing workpiece materials to and from the machine.

In the present invention, setting display panels 34, 35, . . . , 40 (FIG. 1) as terminals are provided near the operator.

Line Order Next, the operation in which a work pallet that has been processed in all processes or a tool pallet that has been used by each machine tool is carried out from the first conveyor 2γ to the pallet dispenser conveyor 15 will be described.

The line off file registers the pallet number of the work pallet that should be taken off the line after all processes have been completed.

In the embodiment of the present invention, only two of the pallet numbers registered in the line-off file can receive the call command, and the other pallet numbers are the work pallets receiving the call command. 1 is line-off and does not receive a call command.

When a work pallet flows from the fourth conveyor 26 to the first conveyor 21 and presses the pallet number reading start limit switch 116 (Figure 5-1), the pallet number reader 11γ (Figure 5-1) reads the pallet. Reading of the number begins.

It is checked whether the read pallet number is the pallet number of the work pallet or the jig pallet, and if it is the pallet number of the work pallet, it is registered in the line-off file and a call command is received. It is checked to see if there is one among the two pallet numbers that matches the pallet number just read, and if there is not, that pallet is not the one that should be on the line, and the pallet is moved to that one on the first conveyor. Go.

If there is a match, that palette is number 5-1.
When reaching the pallet drawer branch point 101 shown in the figure, the first
The transport conveyor 2γ stops.

Next, when the cylinder 102 is operated and the pallet dispenser conveyor 15 is raised, the electric motor 105 is rotated and the pallet dispenser conveyor 15 is operated to carry out the pallet toward the finished product pallet carry-out conveyor 14.

When the pallet is pulled into the pallet sender conveyor 15, the pallet number that matches the pallet number just read out of the two pallet numbers containing the call command registered in the line-off file is erased. , Instead, a call command is given to the first pallet number among the pallet numbers registered in the line of file and which have not received a call command.

The pallet number that was just read in the line-off completion file in which all the pallet numbers of the next pallet that was line-off are registered (the number of the pallet that was line-off)
is registered.

Since this pallet that has been lined off is no longer on the transport conveyor, the pallet number of the pallet that has been lined off is deleted from the conveyor file, and the processing within the computer 42 at the time of line off is completed. do.

In addition, if the pallet number read by the pallet number reading device 11γ is the pallet number of a tool pallet, it is compared with the line-off file described above, registered in the line-off completion file, and deleted from the conveyor file. The pallet is immediately conveyed to the pallet drawer conveyor 15 which is taken off the line without any further processing.

When the work pallet or the tool pallet reaches the connection point between the pallet drawer conveyor 15 and the finished product pallet carry-out conveyor 14, the electric motor 105 stops, the carrying-out operation of the pallet drawer conveyor 15 stops, and the pallet drawer conveyor 15 stops. 15 descends.

Next, the cylinder 10γ operates and the pallet unloading fork 10
8, the work pallet or tool pallet is carried out to the finished product outlet 123.

Branch station The branch station 33 located at the right end of the first conveyor 2γ is provided to identify the destination of the pallet carried into the branch station 33 as described above.

The branching station 33 includes pallet stopping points E, J,
K, and stop position confirmation limit switches I, N, and D are installed at locations corresponding to the stop points E, J, and K, respectively.

At each stop point E of branch station 33. J and K have a cylinder 66 and a lift table 69. as shown in Fig. 6-2. Lifter devices LE, LJ, consisting of γ0, 71,
LK is provided respectively.

The chain conveyor 58 of the first conveyor 2γ is driven to travel by a drive system including a speed reducer 65 and an electric motor 64 via sprocket wheels 58b, 58c and a chain.

Also, the unloading side from the stop position E of the branching station 33 (
On the right side of point E in Figure 6-1) is a pallet delivery chain conveyor 62 with a narrower gauge than the chain conveyor 58.
The pallet carrying chain conveyor 62 is driven by a sprocket wheel 62a fixed to the connecting shaft of the sprocket wheel 58b.The sprocket wheel 62b provided at the other end of the pallet carrying chain conveyor 62 is connected to a lifter 63. It is rotatably provided on a support base, and can be moved up and down by a lift roller 3.

Furthermore, the pallet carry-out chain conveyor 62 is buried in the line of the second conveyor 20 so as to bridge the line, and the work pallets on the pallet carry-out chain conveyor 62 are moved to the line of the second conveyor 20 by the downward movement of the lift cooler 3.
can be transferred to.

Works having the conditions described below are placed on the pallet carried into the branching station 33 (FIG. 1).

(I) A work pallet that has been transferred from the pallet dispenser conveyor 15 in FIG. 1 to the first conveyor 2γ and is being moved to a machine tool for initial process processing.

In this case, the machine tool 1, which is connected to the first conveyor 27 via the pallet pull-in conveyor 28°..., 32,
2, 4, 5. Regarding work pallets whose initial process processing depends on γ, 8, 9° 13, the pallet pull-in conveyors 28°..., 32 pallet standby conveyors are each full of different work pallets and have not received a call command. is carried into the branching station 33.

Stall, pallet pull-in conveyor 22. .... Machine tools 3, 6 communicated with the third conveyor 21 via 25
, 10, 11, and 12 for initial process processing are all carried into the branching station 33 regardless of whether a call command is received or not.

(n) After completing the processing in the previous process, the pallet pull-in conveyors 22, 23, . . . . A workpiece pallet having the same conditions as the workpiece pallet to be carried out from 28 and subjected to the initial process processing of (I) above.

(2) The work pallet is being moved on the first conveyance column t<727 in order to complete all processing steps and return to the pallet sender conveyor 15.

In this way, when a work pallet, for example 69a, is carried into the pallet stopping point E in FIG. is started by.

When the computer 42 receives the command to start reading the work pallet number, the pallet number drilled in the pallet number display plate 44 attached to the side wall of the pallet is read from the emitter 48 and the receiver 49 as shown in FIG. The pallet number is formed and read by the Yolent reading device 90, and an electric signal of a binary code corresponding to the pallet number is transmitted to the computer 42.

The computer 42 quickly identifies whether the work pallet 69a carried into the branching station 33 should be stored in the work pallet storage shelf 16 or transported onto the main conveyor.

A process in which the computer 42 determines the destination of a pallet delivered to the branching station 33 will be described below.

The criteria used by the computer 42 to make this decision are as follows.

(IV) Confirm whether the read pallet number is the correct number.

■) Check whether it is a work pallet or a tool pallet.

(Vl) Confirmation whether the storage shelf is full (■ Confirmation Ni'F whether the read pallet is being called from the machine tool).

- Confirm whether the read pallet has completed all processes.

The items described in (1), . . . , (5) above will be explained in detail below.

Regarding (IV), when the computer 42 reads the pallet number that arrived at the stop point E, the computer 42 determines whether the read pallet number is a promised pallet within a predetermined schedule.

That is, since the pre-promised pallet number is to be set as a two-digit or three-digit number, an error message will be displayed if it is read as a one-digit number.

When an error message is displayed, the operator must check the pallet number attached to the pallet.

After confirming that the pallet number read in (V) is the one promised in advance, it is then determined whether the number is a work pallet number or a tool pallet number.

In other words, since it is predetermined that the jigs and tools are set in the 900 range, the read pallet number is compared with the number 900, and if it is less than 900, it is recognized as the work pallet number, and if it is greater than 900, it is recognized as the work pallet number. is recognized as the jig/tool pallet number.

Next, in the process of comparing the jig/tool pallet number and the workpiece pallet number, if the read pallet number is recognized as the jig/tool pallet number, it is transported to the third transport conveyor 21 via the second transport conveyor 20. be done.

In other words, the pallets in this case are the second conveyor 20, the third conveyor
It is transported to the machine tool side via the transport conveyor 21.

(Once the VD is recognized as a work pallet number, the computer 4
2 is determined based on the match between the pallet number registered in the stacker file and the pallet number just read, and an error is displayed when they match.

That is, since only the numbers of pallets actually stored in the work pallet storage rack 16 are filed in the stacker file, if they match, two pallets with the same number will be transported, and an error will be displayed.

In this case, the operator must confirm the read pallet number.

Further, when the work pallet is taken out from the work pallet storage shelf 16, the pallet number registered in the stacker file is deleted.

Regarding (2), when the pallet number registered in the stacker file and the pallet number just read do not match, the calculation process of the electronic computer 42 is continued and the chapter number of the stacker file marked with @ is searched.

If there is no empty address in the stacker file, the pallet 69a is conveyed to the third conveyor 21 via the second conveyor 20.

If there is an empty address, the electronic computer 42 determines whether the pallet number registered in the machine buffer file and receiving the call command matches the pallet number read at the branching station, and if they match, the pallet is called. The machine tools are then transported via the second transport conveyor 20 to the machine tool area.

(For Ili, if the pallet number registered in the machine file and receiving the call command does not match the pallet number read at the branching station, the arithmetic processing of the electronic computer 42 is continued and the line-off file is The registered pallet number is compared with the pallet number read at the branching station, and if they match, the pallet is conveyed toward the pallet sender conveyor 15 as being complete.

If they do not match, it is checked whether the read pallet number is registered in the conveyor file of the computer 42, and if the pallet number is not registered, an error message is displayed.

That is, since the pallet having the read pallet number is being conveyed to the conveyor, it should naturally be registered in the conveyor file.

When a number is registered for pallet 1, in order to temporarily transport the work pallet 67a that stops at point E to the work pallet storage shelf 16 and make it standby, a branch command for the pallet 67a is issued, the cylinder 66 is lowered, and the pallet 67a is placed on standby. The pallet 61a placed on the table is carried into the second conveyor 20 by the pallet carry-out chain conveyor 62, and the stopper 30 in FIG.
The pallet 6γa is transported by the number 1.

If pallet h69a is being conveyed on the second conveyor 20 among the pallets carried into the branching station 33 in FIG. is lifted upward from the chain conveyor 58 and cut off from the running drive of the chain conveyor 58.

The pallet (for example, γ1a) that has arrived at point K performs a similar operation.

The ivy pallet γ1 enters the corresponding point and moves to the chain conveyor 5.
When the chain conveyor 58 is cut off from the chain conveyor 8, the pallet 69a, which has been instructed to store by the computer 42, is carried out from the second conveyor 20.The chain conveyor 58 is stopped at the point 1.

Work Pallet Storage Shelf The work pallet storage device includes a work pallet storage shelf 16 that stores work pallets that have received a branch command at a branch station, and a work pallet storage shelf that is connected between the second conveyor 20 and the work pallet storage 1fjAI6. A stacker carrying-in conveyor 19 and a stacker carrying-out conveyor 18 that transport work pallets carried in and out of the stacker 16;
The stacker crane 1γ transports work pallets from the stacker carry-in conveyor 19 to the work pallet storage shelf 16 or from the work pallet storage shelf 16 to the stacker carry-out conveyor 18.

In Figures 8-1 and 8-2, the second conveyor 2
The stacker carry-in conveyor 19 connected to the second conveyor 20 transfers the work pallets to be stored to the work pallet storage shelf 16 according to the command from the inner basket computer 42 of the work pallets being conveyed to the second conveyor 20. 2. The conveyor 20 is branched from the conveyor 20.

That is, the stacker carry-in conveyor 19 includes a stopper 301 that operates only when a work pallet to be stored is conveyed on the second conveyor 20 to prevent the work pallet from advancing, and an electric motor 303 that drives a chain conveyor 302. and a frame 305 on which the power transmission mechanism 304 is attached, a chain conveyor holding frame 306 on which the chain conveyor 302 is attached and pivotally provided on the frame 305, and one end on the holding frame 307 of the second conveyor 20. a lift cylinder 308 whose other end is pivotally attached to the chain conveyor holding frame 306; and a positioning tool which is attached to the frame 305 and positions the right and left side surfaces of the work pallet transferred by the chain conveyor 302 at fixed positions. 30
9 (FIG. 8-1) and a positioning cylinder 310 that operates the positioning tool 309.

FIG. 8-2 is a common side view of the stacker carry-in conveyor 19 and the stacker carry-out conveyor 18, and the numbers within 0 indicate the respective parts of the stacker carry-out conveyor 18.

In FIG. 8-1, the stacker discharge conveyor 18 provided orthogonally to the second conveyor 20 is connected to the electronic computer 42.
According to the command, the stacker crane 17 carries out the work pallet transferred from the work pallet storage shelf 16 to the second conveyor 20.

The conveyor 18 includes a frame 314 to which an electric motor 312 and a power transmission mechanism 313 for driving the chain conveyor 311 are mounted, a chain conveyor holding frame 315 to which the chain conveyor 311 is mounted and provided on the frame 314, and a second conveyor 20. The lifting cylinder 316 has one end attached to the holding frame 307 of the chain conveyor and the other end pivotably attached to the chain conveyor holding frame 315.

In FIG. 7-1, the stacker crane 17 includes the guide frame 318 of the fork base 317 and the second conveyor 2.
a base 321 having wheels 320 rolling on rails 319 (Fig. 7-2) provided parallel to the base 321; an electric motor 322 and a power transmission mechanism 323 fixed to the base 321 for driving the wheels 320; , a chain 32 fixed to the base 321 and used to raise and lower the fork base 317
4, an electric motor 325 and a power transmission mechanism 3 for driving
26 and rails 327 (
A roller 328 (Fig. 7-2) engages with the base 321 (Fig. 7-2) to guide the movement of the base 321, and an electric motor 329 (Fig. 7-2) and an arm 330 that is extendable and retractable toward the work pallet storage shelf 16.

The work pallet storage device configured as described above operates as follows.

At the branching station 33 in FIG.
A stopper 301 is put out onto the second transport conveyor 20 at the branch point in order to move the work pallet that has been determined to stand by on the work pallet storage shelf 16 to the stacker carry-in conveyor 19 based on a branch command from a computer 42.

The work pallets to be stored are transferred to the second conveyor 2.
0, and before the stopper 301, it is checked whether the height of the work pallet storage shelf 16 is within the limit. If the height is above the limit, the worker is notified of the abnormality and the work is inspected and reloaded. Let them do it.

The workpiece height detection device that checks the workpiece height is the eighth
- As shown in FIG. 1 and FIG. Detection plate 20 at a predetermined height
c is swingably provided, and when a workpiece with a height exceeding the limit height hits the detection plate 20c, it is detected by a limit switch 20d attached to the side of the detection plate 20c.

When the work pallet hits the work stopper 301, the electric motor 303 and the transmission mechanism 304 cause the chain conveyor 3 to stop.
At the same time, the lift cylinder 308 operates to raise the chain conveyor holding frame 306.
The work pallet is transferred from the second conveyor 20 to the chain conveyor 302.

The work pallet is attached to the chain conveyor holding frame 30
When the chain conveyor 302 is transferred to position 1 corresponding to the stacker crane 17 at the 6th end, the driving of the chain conveyor 302 is stopped, and the 1 noft shifter 308 is operated to lower the chain conveyor holding frame 306.

Next, the positioning tool 3 is moved by the positioning tool cylinder 310.
09 is activated to position the work pallet in the left and right direction.

When the work pallet positioning completion signal is given to the computer 42, the computer 42 performs pre-scheduled program processing.

That is, (I) Confirmation whether there is a work pallet to be carried into the work pallet storage shelf 16 by the stacker crane 17 in addition to the work pallet currently positioned at the fixed position Q of the stacker carry-in conveyor 19 (FIG. 11) (II) ) Delete the number of the work pallet positioned at the fixed position on the conveyor 19 from the conveyor file of the computer 42 (III) Check whether the stacker crane 17 is currently in operation (IV) Empty space in the work pallet storage shelf 16 The electronic computer 42 must make judgments or issue necessary commands for items beyond the discovery of the items while examining the contents of the crane file.

Each item will be explained in detail below.

Regarding (I), the electronic computer 42 stores a special lane file for constantly managing the drawer operation of the stacker crane 17, and this crane file contains the work pallet number to be carried in and the information from the machine tool. The work pallet number to be carried out from the storage shelf 16 by the call is registered, and the work pallet number to be carried out may be called from the machine tool side from time to time, so the number of the carry out pallet in the crane file is registered. A plurality of registered addresses are provided.

Further, only a single number registration address is provided for the carry-in pallet.

In this case, the electronic computer 42 checks whether the loading address of the crane file is empty based on the positioning completion command for the work pallet loaded onto the stacker loading conveyor 19.
The reason why there is no vacancy at the carry-in address is because there is a work pallet to be carried into the work pallet storage shelf 16 in addition to the work pallet carried into the stacker carry-in conveyor 19.
An error occurred in the computer's program processing.

Therefore, since the carry-in address must be empty, the work pallet number is registered in the empty address.

This completes the preparation for storing the work pallet in the work pallet storage shelf 16.

Regarding (II), since the work pallet has been completely branched off from the main conveyor line, the work pallet number must naturally be deleted from the conveyor file of the computer 42.

Regarding (2), even if the work pallet is positioned at the fixed position Q (FIG. 11) of the stacker carry-in conveyor 19, the stack crane 17 picks up another work pallet from the storage shelf 16 before the work pallet is positioned. Since you may have received a command to unload, check whether the stacker crane is in operation or not by checking whether or not it has returned to its home position.If the stacker crane is in operation, the unloading operation is completed. Yes, it will be temporarily suspended.

When the stacker crane 17 is at the origin position (that is, the regular position of the stacker carrying-in conveyor) for the sub, the computer 42 finds a vacant space in the work pallet storage tray 16 by checking whether there is a vacant address in the stacker file.

Since the work pallet was delivered to the stacker delivery conveyor 19 at the branching station 33 under the condition that there was a vacant space in the storage shelf, the stacker file naturally contains the following information:
There must be an empty address.

At this time, the computer 42 must confirm whether the empty address found is an example address.

When the storage position of the work pallet storage shelf 16 where the work pallet is to be stored is determined, a work pallet carry-in command is issued to the stacker crane 17.

When the processing by the computer 42 is completed, the stacker crane 17, which has returned to its origin, operates as follows based on the carry-in command from the computer 42.

That is, in FIGS. 7-1 and 72, the arm 330 is extended and contracted by the electric motor 329 of the stacker crane 17, and the work pallet is transferred to the chain conveyor 302 (8th to
1), the wheels 320 of the base 321 move on the rails 319 (Fig. 7-2), and the fork base 3
17 (FIG. 7-1) moves up and down, extends and contracts the arm 330, and stores the work pallet in a predetermined storage position of the work pallet storage shelf 16, which has already been instructed by the computer 42.

Store in.

Next, the operation of the stacker crane 1γ to carry out a work pallet will be explained.

The program processing on the computer 42 at the time of unloading is (■
Confirmation of the work number being called from the machine side (Vl) This is a confirmation to see if there is room on the main conveyor to carry the work pallet.

The items described in (V) and (VI) above will be explained in detail below.

(When a call command is received from the machine tool side regarding (■), the corresponding work pallet number is registered in the registration address for carrying out of the crane file of the computer 42.

Therefore, unless there is a work pallet to be carried in, the stacker crane 17 must carry out the registered work pallets one after another from the work pallet storage shelf 16.

Regarding (VI), the work pallet carried out from the work pallet storage shelf 16 is returned to the main conveyor, so the electronic IT calculator 42 checks whether there is room for carrying it on the main conveyor.
Check the empty address of the conveyor file and make a decision.

If there is no vacant address, the work pallet carrying operation of the stacker crane is temporarily stopped when a vacant address appears in the conveyor file.

If there is an empty address, the computer 4 will tell you that the work pallet to be taken out should be taken out from the work pallet storage shelf 16.
2 commands the stacker crane 17.

Upon receiving the carry-out command, the stacker crane 17 performs the carry-out operation in the same manner as the carry-in operation, giving priority to the carry-in operation, and transfers the work pallet to the chain conveyor holding frame 315.

Next, the chain conveyor 311 is operated by the electric motor 312 and the power transmission mechanism 313, and at the same time the lift cylinder 3
16 operates to raise the chain conveyor holding frame 315.

When the work pallet is transferred to the desired position on the second transfer conveyor 20, the drive of the chain conveyor 311 is stopped, and the lift cylinder 316 is activated to lower the chain conveyor holding frame and remove the work pallet. It is carried out to the second conveyor 2o.

All of the mechanical operations of the work pallet storage device described above are performed by sequence operations.

In addition, when carrying out the work pallet from the work pallet storage shelf 16 to the second conveyor 20 as described above, the second
If another pallet is traveling on the conveyor 20, the work pallet is prohibited from being carried out from the stacker carrying-out conveyor 18.

Further, upon completion of the carry-out, the work pallet number that has been carried out is deleted from the shuttle file and crane file of the computer 42, and instead, the work pallet number is registered anew in the conveyor file, and the work pallet number is deleted from the computer 42.
The program processing of step 2 is completed.

[Brief explanation of drawings]

FIG. 1 is a flat view schematically showing an automatic feeder for workpieces and jigs and tools according to the present invention. FIG. 2 is a perspective view of the workpiece and tool pallet of the present invention. FIG. 3 is a longitudinal sectional view of the pallet number reading device. FIG. 4 is a plan view of the pallet number display board. Figure 5-1 is a flat view of the pallet dispenser conveyor. FIG. 5-2 is a side view of the pallet dispenser conveyor. FIG. 6-1 is a plan view of the branching station. FIG. 6-2 is a side view of the branching station. FIG. 7-1 is a front view of a stacker crane and a work pallet storage shelf. Figure 7-2 shows the stacker crane and work pallet.
- Storage shelf l side view. FIG. 8-1 is a plan view of the stacker carrying-in conveyor and the stacker carrying-out conveyor. FIG. 8-2 is a side view of the stacker delivery conveyor. FIG. 91 is a plan view of a pallet pull-in conveyor and a pallet standby conveyor. FIG. 9-2 is a side view of a pallet-containing conveyor and a pallet standby conveyor. FIG. 10 is a perspective view of the workpiece height detection device. FIG. 11 is a layout diagram of each conveyor related to the loading and unloading of shufutsuka. In the figure, 1 to 13... Machine tools, 14, 15
...Pallet drawer conveyor, 16...
・Work pallet storage shelf, 16a... Storage shelf for jigs and tools, 17... Stacker crane, 18...
...Stacker unloading conveyor, 19...Shufutsuka loading conveyor, 20...Second transport conveyor, 20a...Work height detection device, 21...
...Third conveyor, 22~25° 28~32...
...Pallet pull-in conveyor, 26...4th
Conveyor conveyor, 27...First conveyor conveyor, 3
3... Branch station, 22a, 22b. 22c, 22d, ~, 25a, 25b, 25c
. 25d,; 28a, 28b, 28c, 28d,
~. 32a, 32b, 32c, 32d---Pallet standby conveyor, 22e~25e: 28e~3
2e... Pallet number reading device, 90...
...Pallet number reading device at branch station, 115
...Pallet number reading device, 117...
・Pallet number reading device, 203...Interface control panel.

Claims (1)

[Claims] 1. In a conveyance device configured with a first conveyor 21 and a second conveyor 20 intersecting with the first conveyor in order to automatically supply pallets to a plurality of machine tools, the first conveyor (a first conveying sprocket that pivots in a vertical plane via a support shaft on a fixed frame)
A plurality of conveyance chains 62a are provided, a conveyance chain 62 is provided in a loop shape on the first conveyance sprocket wheel so as to intersect with the second conveyance conveyor, and the conveyance chain 62 is provided on the fixed frame of the first conveyance conveyor. A lifter device 63 is provided on the base for swinging, a recess is provided in the frame of the second conveyor in order to lower the conveyor chain downward at the position where it intersects with the second conveyor, and A pallet conveying device that delivers and receives pallets by swinging the conveying chain relative to a conveyor.