JPH02138060A - Material automatic feeder - Google Patents

Abstract

PURPOSE:To operate a fully automated line over a long period by providing a control device controlling a connecting mechanism based on the material end detected signal and controlling a discharging mechanism based on the connection section detected signal. CONSTITUTION:When the machining by a mechanical device (press) 40 proceeds and the rear end of the first work is detected by a material end detecting mechanism 4, a control device 36 controls a connecting mechanism 8 based on the material end detected signal to overlap the rear end of the first work and the tip of the second work and connect them. When a connection section detecting mechanism 42 detects that the connection section of the work reaches near the machining section (mold) 41 of a mechanical device 40, the control device 36 controls a discharging mechanism 44 based on the connection section detected signal, defective items machined at the connection section and near it are distinguished from good items and discharged, thus works are connected and machined.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention sequentially joins a plurality of workpiece materials such as strips and continuously supplies them to a mechanical device. The present invention relates to an automatic material supply device that separates and discharges defective products formed at and around joints during processing from non-defective products.

[Prior Art] As a conventional automatic material supply device, there is, for example, one previously filed by the present applicant and published in Japanese Patent Application Laid-Open No. 61-206765.

This item includes a joining mechanism that joins the rear end of the first workpiece and the front end of the second workpiece, and a mechanical device (
A detection mechanism that detects when the machine is near the processing part (for example, a mold, etc.) of a press, etc., a stop mechanism that stops the operation of the mechanical device upon detection, and a stop mechanism that sends the joint forward from the processing part after it has stopped. It is characterized by comprising a delivery mechanism and a starting mechanism that starts the mechanical device after the delivery.

[Problems to be Solved by the Invention] However, in the automatic material feeding device according to the above-mentioned prior art, it is necessary to provide a pilot hole for material conveyance and a blank hole for positioning in the workpiece in advance, so that the product Various pre-processes are required before machining, and there are problems in that the machining efficiency of the machine is insufficient and work is required to position pilot holes and blank holes to the machined part.

The present invention has been made in view of the problems of the prior art, and uses a commonly available workpiece without applying any special processing to the workpiece, and sequentially processes multiple pieces of the workpiece. The purpose of the present invention is to solve the above problems by creating a structure that can be joined together and continuously supplied to a mechanical device.

[Means for Solving the Problems] In order to achieve the above object, the automatic material feeding device of the present invention, as shown in the basic configuration diagram of FIG. A material automatic supply device for processing using a material includes a material edge detection mechanism that detects the rear end of a first workpiece to be machined first and outputs a material edge detection signal; a joining mechanism for overlapping and joining a rear end of a workpiece and a front end of a second workpiece to be subsequently subjected to machining; and a joining mechanism for joining the first workpiece and the second workpiece. a joint detection mechanism that detects when the joint of the machine is near the processing section of the mechanical device and outputs a joint detection signal; and a discharge mechanism that discharges the joint and defective products processed near the joint. and a control device that drives and controls the joining mechanism based on the material edge detection signal and drives and controls the discharge mechanism based on the joint portion detection signal.

[Operation] When processing by the mechanical device progresses and the material edge detection mechanism detects the rear end of the first workpiece, the control device drives and controls the joining mechanism based on the material edge detection signal, and The rear end of the workpiece and the front end of the second workpiece are overlapped and joined.Next, when the joint detection mechanism detects that the joint of the workpiece is near the processing part of the mechanical device, Based on the joint detection signal, the control device drives and controls the discharge mechanism to discharge defective products processed at and around the joint, distinguishing them from non-defective products, and in this way, the workpiece is continuously machined.

By providing the ejection mechanism with the above structure in the mold, the ejection of defective products processed at the joint and its vicinity is possible.
It can be performed continuously in a series of machining steps.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 2 shows an embodiment of the present invention, and is a diagram showing the overall configuration of a material supply device including mechanical devices.

First, to explain the structure, numeral 1 in the figure is a workpiece made of a strip material, etc., and an appropriate amount of workpiece 1 is placed on each of a plurality of reels 3 rotatably supported by a multi-cradle 2.
is wrapped. At the rear end of the workpiece l wound around each reel 3, that is, at the end on the start side, a paper tape (not shown) of an appropriate length is overlapped and wound.

Reference numeral 4 denotes a touch sensor that is a specific example of a material edge detection mechanism for detecting the rear end of the workpiece l, and the same number of touch sensors as the reels 3 are attached to the multi-cradle 2,
When the rear end of the material is detected, a material end detection signal TS is output. The touch sensor 4 has a sensor lever 4a for detecting the rear end of the workpiece 1, the tip of which is connected to the reel 3.
The paper tape that is wrapped around the rear end of the workpiece 1 cuts off the electrical connection between the sensor lever 4a and the workpiece l, so that the workpiece The rear end of l is detected. Further, the multi-cradle 2 has wheels 6 that are rotationally driven by a motor 5, and is movable on rails 7 laid on the installation surface in a direction perpendicular to the plane of the drawing.

8 is a joining mechanism that overlaps and joins the rear end of the first workpiece 1a to be subjected to machining first and the tip of the second workpiece 1b to be subjected to machining next. As shown in FIG. 3, which is partially sectional and shown in detail from the side, this joining mechanism 8 includes a cutting machine 9 for cutting the rear end of the first workpiece la, and a specific example of joining means. The shown spot welding machine 10 and the moving machine 11 for moving the cutting machine 9 and the spot welding machine 10 in the lateral direction orthogonal to the conveyance direction of the workpiece 1
It is equipped with.

The cutting machine 9 includes a cutter 12 that cuts the rear end of a first workpiece 1a, a frame 13 that supports the cutter 12 so as to be movable in the vertical direction, and a piston fixed to the upper part of the frame 13. A cutter cylinder 15 is provided for vertically moving the cutter 12 engaged with the tip of the rod 14 (7). The frame body 13 includes a plurality of reels 3.
A rail gauge 16 that aligns and holds the tips of each workpiece l wound around the rail, and a support that supports the overlapping portion of the rear end of the first workpiece 1a and the front end of the second workpiece 1b. A plate 17 is provided.

The spot welding machine IO welds two workpieces 1a.

A welding head 20 has an upper electrode 18 and a lower electrode 19 that are placed opposite each other in the upper and lower directions so that the overlapping portion of 1b can be sandwiched from above and below, and this welding head 20 is placed and a feed nut 21 is fixed to the lower surface. A slide plate 22, a fixed block 24 on which the slide plate 22 is slidably mounted and rotatably supports both ends of a screw shaft 23 which is screwed into the feed nut 21, and this fixed block 24.
A motor 25 with a reduction gear is fixed to the screw shaft 23 and rotates the screw shaft 23. A joint sleeve 26 is fitted over the output shaft 25a of the motor 25 and the threaded shaft 23, and a key 26a connecting both shafts 23.25a and the joint sleeve 26 allows the shafts 23.25a to be integrated in the rotational direction. There is.

In addition, the upper electrode 18 is driven by a motor to move in the vertical direction, and the overlapping portion is held between the upper electrode 19 and the lower electrode 19 from above and below, and spot welding is performed using electric power from a welding power source (not shown). , as shown in FIG. 4, a joint portion 1c is formed.

Further, the mobile device 11 includes a slide base 27 on which the frame body 13 and the fixed base 24 are mounted and fixed, a fixed base 28 on which the slide base 27 is slidably mounted, and a fixed base 28 fixed on the fixed base 28. A bracket 3 fixed to the lower surface of the slide base 27 is attached to the tip of the piston rod 30 of the drive cylinder 29.
1 is fitted and fixed. 32 is a stop/pa for adjusting the stroke of the slide base 27.

Further, 33 shown in FIG. 2 is a pressure roll that presses and fixes the tip of the workpiece material ib wound on a reel, and 34 is a
This is an operating lever for driving the press roll 33.

Further, 35 is a rear end detection photosensor for detecting the rear end of the workpiece l, and the rear end of the workpiece l cannot be detected due to a malfunction of the touch sensor 4 provided in the multi-cradle 2. It serves as a safety device in case something is not present.

The fixed base 28 is connected to the casing 37 of the control device 36.
The casing 3 is placed and fixed on the top surface.
On the exit side of the welding mechanism 8 on the top surface of 7, a pinch roll 38 having a drive device (not shown) such as a motor is installed for feeding the workpiece l to the mechanical device side. The workpiece l sent out from this pinch roll 38 passes between an upper touch sensor 39a and a lower touch sensor 39b, and is sent to a press 40, which is a specific example of a mechanical device.

Note that the material edge detection signal TS of the touch sensor 4, the detection signal of the rear edge detection photosensor 35, and each detection signal of the upper and lower touch sensors 39a and 39b are sent to the control device 36.

Further, as shown in FIG. 2, a photosensor 42, which is a specific example of a joint detection mechanism, is installed on the right side surface of the press 40. The photosensor 42 detects the joint 1c between the rear end of the first workpiece 1a and the tip of the second workpiece 1b by looking at the step where the two corrugated materials 1a and lb overlap. Accordingly, it is detected whether or not the joint portion 1c has come near the entrance of the mold 41. Such a photosensor 42 is
When the step is detected, a joint detection signal FS is output, and the detection signal FS is also sent to the control device 36.

As the mold 41, for example, a progressive mold (which may be a complete punching mold) consisting of an upper mold 41a and a lower mold 41b can be adopted, and generally, the upper mold 41a is a punch, for example. It is composed of a holder, a punch pad, a punch plate, a stripper plate, a punch, etc., and also includes a lower mold 41.
b includes, for example, a die holder, a die pad, a die receiver, and the like. The mold 41 is provided with a discharge mechanism 44 for discharging defective products processed at the joint 1c and its vicinity when the joint IC arrives.

As shown in FIGS. 5 and 6, the ejecting mechanism 44 is built into an upper die 41a having a punch 45, and also includes a slider 46 made of a plate material, and a slider 46 that moves the slider 46 in the conveying direction of the workpiece l. An air cylinder 47, which is a specific example of an actuator that moves forward and backward in a horizontal direction perpendicular to the
A hammer 48 fixed to the back of the punch 45 and a hammer guide 49 attached to the punch 45 by this hammer 48
Then, the punch 45 is inserted into the lower mold 4 via this hammer guide 49.
It includes a spring 50 made of a coil spring that biases toward the ib side. The slider 46 has a relief hole 51 into which the hammer 48 is removably inserted, and a cylinder rod tip of an air cylinder 47 is connected to one longitudinal end thereof. 52
is a solenoid valve for switching the operation of the air cylinder 47.

In the state shown by the solid line in FIG. 6, where the slider 46 is in the forward position, the relief hole 51 of the slider 46 and the hammer 48 are in the same position where they overlap, so when the punch 45 is pressed with the workpiece 1, Punch 45 lifts up and hammer 4
8 enters the escape hole 51. Therefore, in this case, the workpiece 1 is not processed by the punch 45. On the other hand, in the state shown by the dashed line in FIG. In this case, the relief hole 51 moves to a mismatched position where it does not overlap with the hammer 48, and the hammer 48 is fixed on the lower surface of the slider 46. This prevents the production of defective products.

In addition, in FIG. 5, 53 is a stripper plate;
4 is a punch plate, 55 is a punch pad, 56 is a punch holder, and 57 is an auxiliary plate, and the upper die 4 includes these.
1a is moved up and down by the press ram 58, and the lower mold 41b
Pressing is performed on the workpiece l between. Then, the good product processed by the mold 41 is discharged to the outside through a nylon pipe (not shown).

Further, 60 shown in FIG. 2 is a press gripper feed provided on the scrap discharge side of the mold 41, which is the processing section, that is, on the left side of the press 40, and is used to hold the workpiece 1 after the product has been punched. The scraps are pulled out and supplied to a scrap cutter 61. The scrap cutter 61 cuts the supplied scrap into appropriate lengths, and the chips are accumulated in a container 62.

Furthermore, the material edge detection signal TS of the touch sensor 4, the detection signal of the rear end photosensor 35, each detection signal of the upper and lower touch sensors 39a and 39b, and the joint detection signal FS of the photosensor 42, The control device 36 receives the input signals, and controls the multi-cradle 2 and the cutting machine 9 of the welding mechanism 8 based on these input signals. Spot welding machine 1
Control signals are output to the moving machine 11, the pinch roll 38, the operating state control system of the press 4°, the solenoid valve 52 of the discharge mechanism 44, the press gripper feed 60, the scrap cutter 61, etc. The entire process from supply through press processing to scrap discharge is continuously and automatically controlled.

Therefore, the control device 36 includes a processing device for arithmetic processing the input signal, an output device for outputting control signals for controlling the drive of each of the mechanisms based on the processing results, and the like. As the processing device, for example, a microcomputer having an input/output interface, an arithmetic processing unit, and a storage device can be applied, and the arithmetic processing is executed according to a timer interrupt processing program as shown in the flowchart of FIG. 7, for example. .

First, in step 1, the first
It is determined whether the rear end of No. 1 workpiece 1a has been detected.

The determination in this case is made by checking whether the touch sensor 4 has detected the paper tape.

Until the paper tape appears, it is determined that the rear end of the workpiece 1 has not yet been reached, and the determination in step 1 is repeated. It is determined that the rear end has approached, and the process moves to step 2.

In step 2, it is determined whether the workpiece 1 currently being machined is the workpiece l wound on the last reel 3. Judgment in this case is made by checking whether there is one or more tips of the workpiece l on the rail gauge 16 installed in the cutting machine 9 of the joining mechanism 8. It is determined that all machining has been completed and the process moves to step 18, but if there is one or more, it is determined that the second workpiece ib is to be joined to the first workpiece 1a. Move to step 3.

In step 3, the operation of the pinch roll 38 that sends out the first workpiece 1a and the press 40, which is a mechanical device, is stopped, and the process moves to step 4.

In step 4, the cutter cylinder 15 of the cutting machine 9 is actuated to lower the piston rod 14, and the cutter 12 connected to the lower end thereof cuts the rear end of the first workpiece la, and then in step 5 Transition.

In step 5, the drive cylinder 29 of the moving machine 11 is actuated to move the slide base 27 to the left in FIG. Deploy. At this time, the first workpiece 1a
The rear end of is pushed up slightly by the lower electrode 19.

At the same time, the moving motor 5 of the multi-cradle 2 is driven to move the multi-cradle 2 by one stage (one reel pitch) in the depth direction perpendicular to the plane of the paper in FIG. is inserted into the lower part of the rear end of the first workpiece 1a, and both corrugated materials 1a, lb are inserted by a predetermined width.
Superimpose. Then, the process moves to step 6.

In step 6, the motor 25 with a speed reducer is driven to rotate the screw shaft 23, thereby moving the slide plate 22 to the third position.
While moving to the left in the figure, the upper electrode 18 is lowered by driving an electrode motor (not shown) at an appropriate position, and the inner electrode 18 is moved to a predetermined position of the overlapping portion.
．． Spot weld at step 19. Next, proceed to step 7.

In step 7, the pinch roll 38 and press 40 are started again, and the process moves to step 8.

In step 8, it is determined whether the joint 1c spot-welded in step 6 has come near the mold 41, which is the processing part of the press 40. The determination in this case is made by checking whether or not the photosensor 42 has detected the joint portion 1c, and then the process moves to step 9.

In step 9, the clutch (not shown) of the press 40 is disengaged to stop the operation, and then, in step 10, the speed converter (not shown) of the press 40 is switched to a low speed and the press motor is turned off. (not shown), the slider 46 is moved backward through the operation of the solenoid valve 52 of the discharge mechanism 44 and the air cylinder 47, and the hammer 48 is fixed on the lower surface of the slider 46 and punched. 45 is prevented from lifting, and the ejection mechanism 44 is turned on.

Then, the process moves to step 11.

In step 11, it is determined whether or not the deceleration timer provided in the control device 36 has timed out. The determination in this case is to check whether the press motor has been decelerated to a predetermined speed or not. Until the time has elapsed, it is determined that the press motor has not been decelerated to the predetermined speed and the process of this step is repeated, and when the time has elapsed, the press motor is It is determined that the motor has been decelerated to a predetermined speed, and the process moves to the next step 12.

In step 12, the clutch is connected and the press 40 is restarted, and then the process moves to step 13.

In step 13, it is determined whether the low speed counter provided in the control device 36 has counted up or not. The determination in this case is to check whether the joint part 1c has been sent out a predetermined distance before the mold 41 after restarting the press 40, and corresponds to the operating speed of the press 40 which has been changed to a low speed. Until the count increases, it is determined that the object has not been sent forward a predetermined distance and the process of this step is repeated, and when the count increases, the joint 1c
is determined to have been sent out a predetermined distance forward from the mold 41, and the process moves to step 14.

In step 14, the clutch of the press 40 is disengaged to stop the operation, and then, in step 15, the speed converter of the press 40 is switched to high speed to change the operating speed of the press motor to high speed. Then, the slider 46 is moved forward through the operation of the solenoid valve 52 of the discharge mechanism 44 and the air cylinder 47, and the relief hole 51 provided in the slider 46 is moved forward.
is aligned with the hammer 48 to enable lifting of the punch 45, and the ejection mechanism 44 is turned off. continue,
Proceed to step 16.

In step 16, it is determined whether the speed increase timer provided in advance in the control device 36 has timed out. The determination in this case is to check whether the press motor has been accelerated to a predetermined speed or not, and it is determined that the speed has not been increased to the predetermined speed until the time has elapsed, and the process of this step is repeated. At this time, it is determined that the press motor has been accelerated to a predetermined speed, and the process moves to the next step 17.

In step 17, the clutch is connected and the press 40 is restarted, and then the process returns to step 1. And step 2
The processes of steps 1 to 17 described above are repeated until it is determined that the workpiece 1 currently being machined is the workpiece l wound on the last reel 3.

On the other hand, the workpiece 1 currently being machined by the process in step 2 is the workpiece l wound on the last reel 3.
If it is determined that this is the case, the process proceeds to step 18, where the clutch of the press 40 is disengaged to stop the operation, and the process proceeds to step 19.

In step 19, it is determined whether or not a stop timer provided in advance in the control device 36 has timed up. The determination in this case is to check whether the operation of the press 40 has been reliably stopped, and it is determined that the operation continues until the time is up, and the process of this step is repeated.
When the time has elapsed, it is determined that the driving operation has been stopped, and the process moves to the next step 20.

In step 20, a signal for turning off the power of the press 4o is output, thereby ending the interrupt processing and returning to the main program.

Next, the operation of this embodiment will be explained.

First, the multi-cradle 2 is loaded with an appropriate number of reels 3 (in this embodiment, a case in which 6 reels are used) on which the workpiece l is wound, and each press roll 3
The tip of the workpiece 1 wound on each reel 3 is brought into contact with the rail gauge 16 by passing under the rail.

Next, the motor 5 drives the wheels 6 and the multi-cradle 2
is moved along the rail 7, and the reel 3 on which the workpiece 1 to be machined is first wound is moved to a position facing the cutting machine 9 on the supply trajectory of the workpiece l,
Pull out the tip of the workpiece 1, touch the lower side of the cutter 12, the pinch roll 38, and the upper and lower touch sensors 39a, 39.
b and the photosensor 42, and is passed through the mold 41 which is the processing section. At this time, the workpiece 1 is inserted while processing one pitch at a time from the tip, as in general progressive die processing.

In this way, when the tip of the workpiece 1 reaches the outlet side of the press gripper feed 60, the press ram 58 is stopped at the bottom dead center, the opening/closing valve is opened, and the press gripper feed 60 is opened.
Clamp the workpiece 1 with. After that, press ram 5
By moving the press 8 to the top dead center, setting of the first workpiece 1 is completed, and automatic continuous operation of the press 40 becomes possible.

From this state, when the start button of the press 40 is pressed to start automatic continuous operation, the product is manufactured through the operation of the mold 41 that processes the workpiece l one pitch at a time, and the manufactured product is released from the mold 41. While being discharged to the outside through a nylon pipe, the remaining scrap is pulled out by a press gripper feed 60. Then, the scrap of the workpiece l that has been pulled out is inserted into the scrap cutter 61, and the scrap chips cut thereby are placed in the container 6.
It is accumulated in 2.

In this case, the pinch rolls 38 and the press gripper feed 60 are driven by separate power systems, and the pinch rolls 38 are driven by a separate power system, and the pinch rolls 38 are
is fed out, and the workpiece l is lowered by the lower touch sensor 39b.
Stops feeding when touched. Then, when the press work progresses and the workpiece 1 touches the upper touch sensor 39a, the pinch roll 38 restarts and feeds out the workpiece 1 until it touches the lower touch sensor 39b, and this process is repeated until the workpiece 1 touches the upper touch sensor 39a. are continued.

As the press working progresses, when the touch sensor 4 detects the paper tape wrapped over the rear end of the workpiece 1 wound on the first reel 3, it outputs the material edge detection signal TS and outputs the material edge detection signal TS. Based on the end detection signal TS, the control device 36 stops driving the pinch roll 38 to stop feeding out the workpiece l, and disengages the clutch to stop the operation of the press 40.

Next, according to the control signal output from the control bag W36, the cutter 12 of the cutting machine 9 cuts the rear end of the first workpiece 1a that was previously subjected to press working, and then the moving machine 1
By the operation of the drive cylinder 29 of No. 1, the cutting machine 9 is moved backward and the spot weld Ia 10 is moved onto the workpiece l instead. As a result, the rear end of the first workpiece 1a is pushed up slightly by the lower electrode 19, and at the same time, the motor 5 operates to move the multi-cradle 2 to the first stage (
The front end of the second workpiece ib wound on the second reel 3 is inserted into the rear end of the first workpiece 1a, and the double wave-processed material 1a is moved.

The ends of 1b are overlapped by a predetermined amount.

Subsequently, the welding rod 20 is driven by the motor 25, and the upper electrode 18 is lowered at a predetermined position while moving the upper and lower electrodes 18, 19 in the width direction of the workpiece 1, thereby removing the circumferential electrode 18. At step .19, the overlapping portion is spot welded to form a joint 1c.

Next, the control device 36 restarts the pinch rolls 38 to start feeding out the workpiece l, and restarts the press 40 to resume press working.

In this way, the joint portion 1c of the workpiece l is connected to the pinch roll 38 and the upper and lower touch sensors 39a.

39b and reaches the photosensor 42, and when the photosensor 42 detects the joint 1c from the step where the two workpieces 1a and lb overlap, the control device 36 outputs a control signal to the press 40. , the clutch is disengaged to temporarily stop the operation of the press 40, and the speed converter of the press 40 is switched to a low speed, and the operation continues to be stopped until the speed of the press motor settles down to a low speed. After a predetermined period of time, the clutch is connected to restart the press 40, and the press 40 is operated at low speed the number of times until the joint IC of the workpiece l exits the mold 41.

At the same time, while the press 40 is stopped, the control device 36 operates the solenoid valve 52 to release the discharge mechanism 4 inside the mold 41.
4 is turned on, that is, the slider 46 is switched from the non-processable state shown by the solid line in FIG. 5 to the processable state shown by the dashed line. As a result, the product to be processed while the press 4o is operating at low speed, that is, until the joint part 1c of the workpiece l is sent forward a predetermined distance from the photosensor 42 and passes through the mold 41. (Products manufactured during this period have slight deviations in dimensional accuracy, shape, etc. due to the influence of the step at the joint portion 1c.) All products are discharged as defective products to a separate location from the products.

Next, after the operation of the press 40 is stopped by the joining part 1c exiting the exit of the mold 41, the control device 36 outputs a control signal to switch the speed converter to high speed and return to the normal operating speed. At the same time, the solenoid valve 52 of the discharge mechanism 44 is operated to switch the discharge mechanism 44 to an OFF state, which is a non-processable state.

Then, after a predetermined time, the clutch is connected and the press 4
0 operation is restarted, and press working by the mold 41 is continued until the rear end of the currently used workpiece l is detected.

By repeating the above process, when all the workpieces l of all the reels 3 loaded in the multi-cradle 2 are used up and the touch sensor 4 detects the paper tape wrapped around the rear end of the last workpiece 1, the detection signal is Based on this, the control device 36 outputs a control signal, thereby stopping the operation of the press 40, and after a predetermined time, the power is cut off and all movements are completely stopped.

In addition, in the above embodiment, an example was explained in which spot welding was applied as a means of joining the workpieces l, but the present invention is not limited to this, and of course other electric welding such as seam welding etc. However, other fixing means other than welding can also be applied.

[Effects of the Invention] As described above, according to the present invention, there is provided a material edge detection mechanism that detects the rear end of the first workpiece and outputs a material edge detection signal; A joining mechanism that overlaps and joins the rear end and the front end of a second workpiece, a joint detection mechanism that detects the joint and outputs a joint detection signal, and detects defective products processed near the joint. The structure is equipped with a discharge mechanism that discharges the material, and a control device that drives and controls the joining mechanism and discharge mechanism based on the material edge detection signal and the joint detection signal. It can be used as a material, and when using a strip material as a workpiece in a mechanical device such as a press that performs machining using a mold, it can enable a fully automated line that lasts for a long time. Therefore, it is possible to provide an automatic material feeding device that has high processing efficiency and can perform continuous unmanned operation for a long time.

In addition, we have installed an ejection mechanism in the mold that serves as the processing section, and have a configuration that allows only defective products made near the joint to be individually ejected while processing continues. There is no need for positioning work, etc., and the burden of operation and maintenance on the operator can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the basic configuration of the present invention, Fig. 2 is a schematic explanatory drawing showing an embodiment of the invention, and Fig. 3 is a partially cross-sectional view showing an embodiment of the joining mechanism according to the invention. An explanatory diagram,
FIG. 4 is a plan view showing the main part of the joining mechanism, FIG. 5 is a sectional view showing the main part of the mold having the ejection mechanism according to the present invention, and FIG. 6 is a plan view of the ejection mechanism shown in FIG. 7 are flowcharts showing one embodiment of the processing procedure of the control device according to the present invention. 1: Workpiece 1a: First workpiece 1b: Second workpiece IC=Joint part 2: Multi-cradle
3: Reel 4: Touch sensor (material edge detection mechanism) 8: Vi joining mechanism 9: Cutting machine IO Nispot welding machine 11: Moving machine 12: Cutter 20 = Welding head 38: Control device
38: Pinch roll 40 nibbles (mechanical device) 41: Mold (processing section) 42: Photo sensor (joint detection mechanism) 44: Discharge mechanism 45: Punch 46: Slider 47: Air cylinder (actuator) 48: Hammer
50 Nispring 60 Nibless Gritz Puffed Patent Applicant Citizen Watch Co., Ltd.

Claims (1)

[Claims] In an automatic material supply device for processing a workpiece such as a strip using a mechanical device, the rear end of a first workpiece to be machined is first detected and a material edge detection signal is generated. a material edge detection mechanism for outputting a material; a joining mechanism that overlaps and joins the rear end of the first workpiece and the front end of a second workpiece to be subsequently subjected to machining; the workpiece and the second
A joint detection mechanism that detects when a joint with a workpiece is near a processing section of a mechanical device and outputs a joint detection signal; and a control device that drives and controls the joining mechanism based on the material edge detection signal and drives and controls the discharge mechanism based on the joint detection signal. Device.