JP2014087889A - Work-piece processing line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work-piece processing line capable of preventing human errors, such as omission of a work-piece processing step, with a simple configuration at a low cost.SOLUTION: An unprocessed work-piece W2 is held on standby upstream of a regulating member 10. When the unprocessed work-piece W2 is carried into a processing station 3a, the regulating member 10 is moved to downstream side with the unprocessed work-piece W2 and is kept at a downstream side position B. When a processed work-piece W1 processed in the processing station 3a is carried out, the regulating member 10 is moved to an upstream side position A.

Description

  The present invention relates to a workpiece processing line in which workpieces are carried in and out of a plurality of machine tools that perform different workpiece processing by an operator's manual work.

  For example, when manufacturing cylinder heads and cylinder blocks, which are engine components, the workpiece is subjected to different predetermined processes such as drilling, tapping, and end milling, so a plurality of machine tools corresponding to each process are arranged. In some cases, continuous production is performed by forming a processing line.

  When transferring workpieces between these machine tools, it is common to use an automatic transfer device. However, depending on the size, weight, etc. of the workpieces, There is a case in which a so-called manual handling processing line is configured in which an operator sequentially conveys workpieces manually by a conveyor.

  In such a hand-processed processing line, from the viewpoint of improving work efficiency, usually, the machine tools are arranged in the order of the machining steps, and the work of sequentially transferring the workpieces from the upstream side to the downstream side of each machine tool is repeatedly performed.

  By the way, when a workpiece transfer operation is performed on a hand-processed processing line, there is a risk that a human error such as, for example, mistaking a non-machined workpiece as a machined workpiece and skipping the machining process and conveying the workpiece. In order to prevent such a human error, for example, in Patent Document 1, first and second stoppers for restricting the loading and unloading of workpieces are provided in each processing station so as to be able to move up and down, and the detection signal of the workpiece detector The first and second stoppers are each driven up and down by a cylinder member to provide a control device that permits or blocks the passage of the workpiece.

JP 2008-80414 A

  However, although the conventional control device can prevent human error such as skipping of the machining process, each machine tool is provided with a cylinder member for moving up and down the workpiece detector and the stopper, and a control device for controlling them is required. However, there is a problem that the entire processing line becomes complicated and expensive.

  The present invention has been made in view of the above-described conventional situation, and an object of the present invention is to provide a workpiece processing line that can prevent a human error such as skipping a workpiece processing process at a low cost with a simple configuration.

A first aspect of the present invention is a workpiece processing line in which a plurality of machine tools each having a processing station for performing predetermined processing on a workpiece are arranged, and the workpiece is transferred between the processing stations of each machine tool manually by an operator. ,
A workpiece transfer path that is provided on the operator side so as to connect the respective processing stations, and transfers the workpiece from the upstream processing station to the downstream processing station;
A restriction that is arranged to be movable between an upstream position and a downstream position in each processing station on the work transport path and restricts the work from being directly transported from the upstream side to the downstream side of each processing station. With members,
Loading the unprocessed workpiece waiting on the upstream side of the restriction member into the processing station is performed in a state where the restriction member is moved to the downstream position together with the unprocessed workpiece,
Carrying out the processed workpiece, which has been processed at the processing station, from the processing station is performed in a state where the regulating member is moved to the upstream position.

The invention of claim 2 is the workpiece processing line according to claim 1,
A stopper member that prevents the restricting member from moving beyond the upstream position and the downstream position is provided at a portion corresponding to the upstream position and the downstream position of the workpiece conveyance path. It is said.

  The workpiece machining line according to the invention of claim 1 is configured such that the workpiece is conveyed to the machining station of the adjacent machine tool after having passed through the machining station of each machine tool. For this purpose, the workpiece located upstream of the regulating member disposed on the workpiece conveyance path is carried into the machining station, and the workpiece located within the machining station is carried out downstream of the regulating member. . As a result, it is possible to prevent a necessary processing step from being skipped or the same processing from being performed twice.

Specifically, the restriction member that restricts the transfer of the workpiece directly from the upstream side to the downstream side in each processing station, that is, without passing through the processing station, is provided with an upstream position and a downstream position in each processing station on the workpiece transfer path. An unprocessed workpiece that is arranged so as to be movable between the side position and is waiting on the upstream side of the regulating member is carried into the machining station while the regulating member is moved to the downstream side. Unloading the processed workpiece, which has been processed in, from the processing station is performed in a state where the regulating member is moved to the upstream position.

  Since the restricting member is positioned downstream of the unprocessed workpiece in this way, the unprocessed workpiece is always carried into the processing station unless the restricting member is skipped and conveyed. Process skipping can be prevented. In addition, since the worker recognizes that the workpiece positioned on the upstream side of the regulating member is an unprocessed workpiece, a human error due to misunderstanding can be prevented from this point.

  In addition, the workpiece located in the processing station is always carried out to the downstream side of the regulating member, and the workpiece located on the downstream side of the regulating member is not carried into the machining station again. It is possible to prevent the same processing from being performed twice.

In the present invention, a human error can be prevented with a structure in which the regulating member is provided so as to be movable between the upstream position and the downstream position, so that compared with the case where the control device of the conventional publication is provided. The entire processing line can be simplified and realized at a low price.

  In the invention of claim 2, since the stopper member is provided at the part corresponding to the upstream side position and the downstream side position of the workpiece conveyance path, the regulating member is not moved to the adjacent processing station. Skipping and double processing can be prevented.

It is a schematic block diagram of the workpiece processing line by Example 1 of this invention. It is sectional drawing (II-II sectional view taken on the line of FIG. 1) of the conveyance chute in which the control member of the said workpiece processing line was arrange | positioned. It is a figure which shows the manual handling work procedure in the said workpiece | work processing line. It is a top view of the conveyance rail of the workpiece | work processing line of Example 2 of this invention. It is a front view of the said workpiece conveyance path. It is a top view of the conveyance path of the workpiece | work processing line of Example 3 of this invention. It is a front view of the said workpiece conveyance path.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 3 are diagrams for explaining a workpiece machining line according to a first embodiment of the present invention.

  In the figure, reference numeral 1 denotes a so-called hand-handling type work processing line. The workpiece processing line 1 includes first, second, and third processing stations 2a, 3a, and 4a that sequentially perform different processing such as drilling, tapping, end milling, and face milling on a workpiece. , A plurality of third machine tools 2, 3 and 4 are arranged in the order of processing from the upstream side a to the downstream side b.

  In the workpiece machining line 1, workpieces are transferred between the machining stations 2 a to 4 a of the machine tools 2 to 4 by the manual operation of the operator 5.

Specifically, the workpiece is loaded into the machining station 2a of the first machine tool 2 to perform a predetermined workpiece machining, and then the machined workpiece is unloaded. In the next process, the workpieces are continuously produced by repeatedly carrying in / out operations of carrying them into the machining station 3a of the second machine tool 3 as unmachined workpieces in the next step.

  A transport chute (work transport path) 6 for transporting a workpiece between the processing stations 2a to 4a is disposed on the front side of the processing stations 2a to 4a of the machine tools 2 to 4 as viewed from the operator 5. Yes.

  The conveyance chute 6 is U-shaped in a cross section and is opened on a conveyance table (not shown). The front vertical wall 6b and the back vertical wall 6c are integrally bent at both edges of the bottom wall 6a. It has a formed structure. On the bottom wall 6a, an emboss plate (not shown) having a large number of concave and convex shapes is attached for improving slippage when a workpiece is conveyed.

  A start switch 7 for starting the workpiece machining is provided on the downstream side of each of the machine tools 2 to 4 of the transport chute 6.

  A regulating member 10 for restricting the workpiece from being directly conveyed from the upstream side to the downstream side of each machining station is disposed at a portion corresponding to each machining station 2 a to 4 a of the conveyance chute 6. Each regulating member 10 is disposed so as to be able to reciprocate between an upstream position A and a downstream position B in each processing station 2a, 3a, 4a.

  The restriction member 10 is made of resin or sheet metal, and as shown in FIG. 2, a restriction portion 10 a formed so as to close substantially the entire area within the conveyance chute 6, and a vertical wall 6 b in front of the conveyance chute 6. The front and back engaging portions 10b and 10c are formed integrally with the front and back engaging walls 10b and 10c, and the front and back engaging portions 10b and 10c are integrally formed. It has a structure in which roll members 11, 11 abutting on the upper end surface are rotatably attached. As a result, the regulating member 10 can reciprocate on the conveyance chute 6.

  Upstream and downstream stopper members 13 and 14 are disposed at the upstream position A and the downstream position B of each of the processing stations 2a to 4a of the transport chute 6, respectively. Are attached to the front vertical wall 6b of the transport chute 6.

  The front engaging portion 10b of the regulating member 10 is integrally formed with an extending portion 10d extending downward, and the extending portion 10d faces the stopper members 13 and 14 when viewed in the transport direction. ing. When the extension 10d of the restricting member 10 contacts the upstream and downstream stopper members 13 and 14, the movement range of the restricting member 10 is restricted within the ranges of the processing stations 2a to 4a.

Here, in order not to remove each regulating member 10 from the transport chute 6, a locking portion 10e extending to face the lower surface of the bottom wall 6a of the transport chute 6 may be formed following the extension 10d. .

Further, in view of the size relationship between the processing stations 2a to 4a and the workpieces, when the restricting member 10 is not positioned near the upstream position A and the downstream position B, the restricting member 10 is in the way. Therefore, it is difficult to carry the workpiece into and out of each processing station 2a to 4a.

  The work procedure of the workpiece machining by the workpiece machining line 1 will be described.

  In the present embodiment, the processed workpiece W1 processed at the second processing station 3a is unloaded along the FIGS. 1 and 3A to 3E, and the first processing is performed on the second processing station 3a. A case where the processed workpiece processed at the station 2a is carried in as an unprocessed workpiece W2 will be described.

  The worker first transports the unprocessed workpiece W2 unloaded from the first processing station 2a to the upstream side of the regulating member 10 of the second processing station 3a via the transport chute 6, makes it wait, and then continues to the second processing station. The processed workpiece W1 that has been subjected to the predetermined workpiece processing in 3a is carried out to the conveyance chute 6 (see FIG. 3A).

At this time, the restricting member 10 is located at the upstream position A of the second processing station 3a. Therefore, the processed workpiece W1 is carried out to the downstream side of the restricting member 10 without any trouble, and is directly controlled by the third processing station 4a. It is conveyed to the upstream side of the member 10 (see FIG. 3B).

  Next, the operator moves the regulating member 10 positioned at the upstream position A of the second processing station 3a to the downstream side together with the unprocessed workpiece W2 waiting on the upstream side thereof, and the downstream position B Evacuate. As a result, the unprocessed workpiece W2 is positioned in front of the second processing station 3a (see FIG. 3C), and in this state, the unprocessed workpiece W2 can be carried into the second processing station 3a without any trouble (FIG. 3D). )), Set the machining position, and then press the start switch 7. As a result, predetermined processing is performed on the unprocessed workpiece W2.

  The restricting member 10 is moved to the upstream position A during the workpiece machining from the point in time when the unmachined workpiece W2 is brought into the second machining station 3a (see FIG. 3E).

In this way, workpieces are continuously produced by repeatedly carrying in and out the workpieces to the processing stations 2a to 4a of the machine tools 2 to 4.

  Here, the operator forgets to return the regulating member 10 to the upstream position A after carrying the unmachined workpiece W2 into the machining station 3a of the second machine tool 3 (two points in FIG. 3 (e)). For example, it is conceivable that the worker has left the workplace due to a break. In this case, when the worker returns and unloads the processed workpiece from the processing station 3a as it is, the processed workpiece and the unprocessed workpiece remain on the upstream side of the restriction member 10, or the processed workpiece becomes the restriction member 10. From the point that it is carried out to the upstream side instead of the downstream side, the operator can easily notice that the regulating member has forgotten to return to the upstream position A, and can prevent skipping of the machining process and double machining.

  Further, even if it is forgotten to return the restricting member 10 to the upstream position A and the next unprocessed work is carried into the processing station 3a, the processed work remains in the processing station 3a. You will notice that you have forgotten to return the member 10.

  According to the workpiece processing line 1 of the present embodiment, the regulating member 10 is disposed so as to be movable between the upstream position A and the downstream position B of each of the processing stations 2a to 4a of the conveyance chute 6, and the workpiece Restricted direct transport to the downstream side. For example, when the unprocessed workpiece W2 waiting on the upstream side of the regulating member 10 of the second machine tool 3 is carried in, the regulating workpiece 10 is moved to the downstream side together with the regulating member 10 to move the regulating workpiece 10 to the downstream side. 10 is retreated to the downstream position B, and when the processed workpiece W1 that has been processed at the processing station 3a is unloaded, the regulating member 10 is moved to the upstream position A. I did it.

  As described above, since the regulating member 10 is provided on the downstream side of the unprocessed workpiece W2, it is possible to prevent the machining process of the unmachined workpiece from being skipped unless the workpiece is conveyed by jumping over the regulating member 10.

  In addition, since the worker recognizes that the workpiece conveyed to the upstream side of the regulating member 10 is an unmachined workpiece, a human error due to misunderstanding can be prevented from this point.

  In this embodiment, it is possible to prevent human error with a structure in which the regulating member 10 is provided so as to be movable between the upstream position A and the downstream position B of each processing station of the transport chute 6. Compared with the control device of the conventional publication, the entire processing line can be simplified and realized at a low price.

  Further, in this embodiment, since the stopper members 13 and 14 are respectively provided at the portions corresponding to the upstream position A and the downstream position B of the transport chute 6, the restricting member 10 is moved to the position of the adjacent processing station. It is possible to reliably prevent human mistakes such as

  4 and 5 are diagrams for explaining a workpiece processing line according to the second embodiment of the present invention. In the present embodiment, since the work transport path is different from that of the first embodiment, the work transport path will be described.

  The workpiece conveyance path 20 of the present embodiment is disposed on the operator side of the processing station of each machine tool, and includes a guide rail 22 laid on a conveyance table 21 and a conveyance pallet mounted on the guide rail 22. 23.

  A guide member 22b fixed to the bottom surface of the transport pallet 23 is slidably engaged with the two rear rails 22a and 22a before and after the guide rail 22 is formed.

  The conveying pallet 23 is divided into an upstream unprocessed workpiece placement portion 23 a and a downstream processed workpiece placement portion 23 b by a regulating member 24. The regulating member 24 is movable between the upstream position A and the downstream position B in each processing station by moving the conveyance pallet 23, and regulates the direct conveyance of the workpiece to the downstream side. It is.

  For example, when the unprocessed workpiece W2 mounted on the unprocessed workpiece mounting portion 23a of the transfer pallet 23 is loaded into the processing station, the transfer table 23 is moved to the downstream side and the restriction member 24 is moved to the downstream position B. When the processed workpiece W1 which is performed in the retracted state and the workpiece has been processed is carried out to the processed workpiece mounting portion 23b, the conveying pallet 23 is moved to the upstream side, and the regulating member 24 is made to wait at the standby position A. In the state.

  In the present embodiment, a restricting member 24 is disposed between the unprocessed workpiece placing portion 23a and the processed workpiece placing portion 23b of the transport pallet 23, and the restricting member 24 is arranged at the upstream position A and the downstream position B. Since the direct conveyance of the workpiece to the downstream side is regulated by moving between the workpiece and the workpiece, the workpiece is conveyed downstream without passing through the processing station unless the workpiece is conveyed by jumping over the regulating member 24. Therefore, it is possible to surely prevent the machining process from being skipped, and the same effect as in the first embodiment can be obtained.

  6 and 7 are diagrams for explaining a workpiece machining line according to a third embodiment of the present invention. In the present embodiment, since the work transport path is different from that of the first embodiment, the work transport path will be described.

  The work transport path 25 of this embodiment is disposed on the operator side of the processing station of each machine tool, and includes a guide rail 27 disposed on the transport table 26 and a transport pallet 28 mounted on the guide rail 27. And a transport handle 29 attached to the operator side of the transport pallet 28.

  The guide rail 27 includes rails 27a and 27a fixed to the front and rear side walls of the transport table 26, and three rollers 26b that are movably engaged with the rails 27a.

  The conveying pallet 28 is divided into an upstream unprocessed workpiece placement portion 28 a and a downstream processed workpiece placement portion 28 b by a regulating member 30.

  The restricting member 30 is movable between the upstream position A and the downstream position B in each processing station by moving the conveying pallet 28, and the workpiece is moved downstream without passing through the processing station. Direct transportation is restricted.

  Also in the present embodiment, as described above, unless the control member 30 is jumped over, it is not transported without passing through the processing station, and substantially the same as in the first embodiment in which the skip of the processing process can be reliably prevented. The effect is obtained.

DESCRIPTION OF SYMBOLS 1 Work processing line 2-4 The 1st-3rd machine tool 2a-4a The 1st-4th processing station 5 Worker 6 Conveyance chute (work conveyance path)
10, 24, 30 Regulating members 13, 14 Stopper members 20, 25 Workpiece transport path A Upstream position B Downstream position W1 Worked workpiece W2 Unmachined workpiece

Claims (2)

In a work processing line in which a plurality of machine tools having processing stations for performing predetermined processing on a work are arranged, and work transfer between the processing stations of each machine tool is performed manually by an operator,
A workpiece transfer path that is provided on the operator side so as to connect the respective processing stations, and transfers the workpiece from the upstream processing station to the downstream processing station;
A regulating member that is arranged to be movable between an upstream position and a downstream position in each processing station of the workpiece conveyance path, and that regulates the conveyance of the workpiece directly from the upstream side to the downstream side. ,
Loading the unprocessed workpiece waiting on the upstream side of the restriction member into the processing station is performed in a state where the restriction member is moved to the downstream position together with the unprocessed workpiece,
The workpiece processing line, wherein the processed workpiece that has been processed at the processing station is unloaded from the processing station while the regulating member is moved to an upstream position. In the workpiece processing line according to claim 1,
A stopper member that prevents the restricting member from moving beyond the upstream position and the downstream position is provided at a portion corresponding to the upstream position and the downstream position of the workpiece conveyance path. Work processing line.

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