JPH074803B2 - Control device for work material transfer device - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a control device for a transfer device that presses a processed material such as a plate material or a square material placed on a table from above and transfers the processed material from one side of the table to the other side.

[Prior art]

As a conventional technique, an elevating frame that is vertically moved by an elevating motor is provided above a table, and a transfer unit (roller) that is driven by a feed motor is provided below the elevating frame.
And a descending means for detecting the arrival of the workpiece placed on the table and rotating the elevating motor in the direction in which the elevating frame descends, and detecting the descending amount of the elevating frame to stop the elevating motor and feed A control device for a work material transfer device, which is provided with a conveying means for driving a motor, and a returning means for detecting the carry-out of the work material, stopping the feed motor, and rotating the elevating motor in a direction in which the elevating frame rises. was there.

[Problems to be Solved by the Invention]

In the above-mentioned conventional ones, since the transfer part is evacuated upward from the table except during processing, a blade such as a circular saw or a planer installed on the table part is used when carrying in, carrying out, or not using the processed material. Will be exposed to the outside,
There was a risky drawback. It is an object of the present invention to obtain a novel control device for a work material transfer device that solves the above drawbacks.

[Means for Solving the Problems]

The present invention is configured as follows to achieve the above object. That is, an elevating frame that is moved up and down by an elevating motor is provided above the table, and a transfer unit that is driven by a feed motor is provided below the elevating frame to detect the thickness of the workpiece placed on the table. A sensor, a height sensor for detecting the amount of rise of the lifting frame, and a carry-out sensor for detecting the carry-out of the work material from the transfer unit are provided, and a signal of the thickness sensor is input to raise the lifting motor to lift the lifting frame. Direction to rotate in the direction, when the rising frame is lifted by a predetermined amount, the height sensor signal is input to stop the lift motor and the feeding motor is driven, and the output sensor signal is input to feed. And a return means for stopping the motor and rotating the elevating motor in the direction in which the elevating frame descends. It is preferable to provide an off-delay timer circuit in the stop circuit for stopping the feed motor of the returning means. Further, it is preferable that the transfer unit is supported by the elevating frame so as to be vertically movable, and is urged downward by an elastic body. Further, a lever projecting downward is provided on the front part of the elevating frame located on the transfer start end side of the transfer part so as to be swingable in the front-rear direction, and the thickness sensor and the height sensor are operated by the lever. Good to do.

[Action]

Since the present invention has the above-described configuration, the transfer section moves up to a position corresponding to the thickness of the processed material at the time of processing, and when the processing is completed, descends to approach the upper surface of the table and reach the table section. It will cover the installed cutting tool.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a perspective view showing a transfer device showing an embodiment of the present invention, FIG. 2 is an enlarged side view of the transfer portion, and FIG.
FIG. 4 is a block diagram of the control circuit, and FIG. 4 is its flowchart. In FIG. 1, reference numeral 1 is a frame, 2 is a table on which a processed material W such as a wooden plate and square timber is placed, and a circular saw (not shown) for cutting the processed material W is provided at the center thereof. It is attached so as to project upward. The column 3 is erected and fixed to the frame 1, and the cross frame 4 is orthogonally arranged on the column so as to be vertically movable and non-rotatably supported. The cross frame 4 is connected to an elevating motor 6 attached to the upper end of the column 3 via an elevating screw 5, and is vertically moved by rotating the elevating motor 6 forward and backward. An elevating frame 7 is fixed to the left end of the cross frame 4, and a transfer unit 8 is attached to the elevating frame 7. As shown in FIGS. 1 and 2, the transfer unit 8 has a case 9 fixed to the elevating frame 7, and two support shafts 10 projectingly fixed to the front and rear of the case 9 toward the right side. , Each support shaft
A pair of arms 11 are opened in the front-rear direction and rotatably fitted in the arms 10, respectively, and each arm 11 is pressed and urged downward by an elastic body 12 made of a coil spring. A rotary shaft 13 is rotatably supported at the rotating end of each arm 11 about a horizontal axis, and each rotary shaft 13 is
The rollers 14 are fixed to the right ends of the respective. The outer circumference of each of these rollers 14 is formed of rubber. In addition, each of the rollers 14 divides the axially intermediate portion or forms a slit in the intermediate portion to form a gap portion 14a, and the blades protruding from the table 2 when each roller 14 descends into the gap portion 14a. Make sure they fit together. The feed motor 15 is attached to the upper part of the case 9, and the rotary shafts 13 are connected to the feed motor 15 in synchronization via a transmission mechanism (not shown) including a chain and a sprocket. A lever 16 is attached to the front of the lifting frame 7 in the front-back direction (second
It is supported so as to be swingable in the left-right direction in the drawing. As shown by the solid line in FIG. 2, the lever 16 is biased by a spring (not shown) so as to incline downward toward the front. 17
Is a roller-shaped contactor rotatably attached to the lower end of the lever 16 and rolls along the upper surface of the workpiece W when the workpiece W is supplied. The limit switch LS1 is attached to the swing shaft center of the lever 16. The limit switch LS1 is turned on when the lever 16 is turned to the right in FIG. 2, and turned off when turned to the left as shown by the solid line in FIG. The limit switch LS1 serves as the thickness sensor and the height sensor of the present invention. In addition, the cross frame 4 is provided at the upper end and the lower end of the column 3.
The upper limit switch LS2 that is turned on when the cross frame 4 reaches the upper end, and the lower limit switch LS3 that is turned on when the cross frame 4 reaches the lower end are attached, and each arm 11 described above is attached. Limit switches LS4 to LS7 that are carry-out sensors that are turned on when the arms are rotated upward are arranged in the section. FIG. 3 is a block diagram of a control circuit for controlling the raising motor 6 and the feed motor 15 described above, and is as follows. That is, A is a raising means of the transfer section 8, and detects the thickness of the workpiece W placed on the table 2 by the thickness sensor 20 (limit switch LS1), and operates the forward rotation circuit 21 by this detection signal. Then, the lifting motor 6 is rotated in the forward direction to move the transfer unit 8
Raise. Further, B is a transfer means, and when the amount of rise of the transfer section 8 reaches a predetermined value, the height sensor 22 (limit switch LS1) detects this height and operates the stop circuit 23 to operate the lifting motor. 6 is stopped and the drive circuit 24 is operated to activate the feed motor 15, which causes the roller 14 to rotate and conveys the workpiece W backward (to the right in FIG. 2). Further, C is a return means, and when the processed material W is carried out from the transfer section 8, the carry-out sensor 25 (limit switches LS4 to LS7) detects the carry-out and operates the reverse rotation circuit 28 to operate the lifting motor 6 Is reversely rotated, the transfer unit 8 is lowered toward the table 2, the stop circuit 26 is simultaneously activated, and the feed motor 15 is stopped via the off-delay timer circuit 27. A flowchart for executing the above control is shown in FIG. It should be noted that S10 to S26 in FIG. 4 indicate steps in the flowchart. First, in step S10, the processed material W is placed on the front portion (left portion in FIG. 2) of the table 2. In this state, the workpiece W is moved, for example, manually in the direction of the transfer portion 8 and the moving side end of the workpiece W is collided with the contact 17 to swing the lever 16 rightward in FIG. 2 against the spring force. Then, the limit switch LS1 is turned on in step S11, the elevating motor 6 is normally rotated in step S12, and the transfer unit 8 is elevated via the cross frame 4 and the elevating frame 7. As the transfer unit 8 rises, the lever 16 gradually turns to the left in FIG. 2, and when it reaches the vertical line L, the lever 16 is moved by the reaction force of the spring as shown by the solid line in FIG. It rotates to the left and returns to the initial position. Then, in step S13, the limit switch LS1 is turned off, and in step S14, the lifting motor 6 is stopped to stop the lifting of the transfer section 8, thereby setting the lift amount of the transfer section 8. In this case, when the lever 16 is positioned on the vertical line L, the length of the lever 16 is set so that the lower end of the contact 17 is positioned H above the lower end of each roller 14, which is 7 mm in this example. The elastic body 12 is compressed by about 7 mm when the rollers 14 bite into the work material W so that the work material W can be transferred smoothly. Next, in step S15, the feed motor 15 is activated to rotate each roller 14, and in step 16, the off-delay timer circuit 27 is operated. In this state, when the work material W is pushed in the direction of the roller 14 manually, for example, each roller 14 sequentially comes into pressure contact with the upper surface of the work material W from the front side thereof, that is, it bites into the work material W and moves the work material W backward (second Transfer to the right in the figure). When the rollers 14 bite into the workpiece W from the front side, the arms 11 sequentially rotate upward from the front side. When each arm 11 rotates upward, it is determined in steps S17 to S20 whether each limit switch LS4 to LS7 is on or off. If all limit switches LS4 to LS7 are off, proceed to step S21. Reverse the elevator motor 6
The transfer unit 8 is lowered via the cross frame 4 and the elevating frame 7. If any of the limit switches LS4 to LS7 is ON, the process jumps to step S15 to continue the rotation of the feed motor 15. Next, in step S22, the timer of the off-delay timer circuit 27 waits until it is turned off, and when this is turned off, step S23 stops the feed motor 15. The waiting in step S22 is for preventing the end of the transfer of the workpiece W from being caught in the rearmost part of the roller 14 while the transfer part 8 is descending. When the amount of lowering of the transfer unit 8 reaches a predetermined value, the limit switch LS3 is turned on in step S24, the lifting motor 6 is stopped in step S25, and the control program ends in step S26. As mentioned above, the limit switch LS1 for height sensor and thickness sensor and the limit switch LS4 for carry-out sensor
By providing LS7 on the transfer section 8 side, the processed material transfer device is unitized and can be easily attached to an existing machine. According to the present invention, an orange lamp (a), a red lamp (a) and a green lamp (c) are provided at a position where the operator can easily see, for example, the front portion of the feed motor 15 shown in FIG. Step S1
0, that is, when the limit switch LS1 is turned off, the orange lamp (a) is turned on, and the limit switch L in step S11 is turned on.
When S1 is turned on, the red light (a) is turned on, and step S15
It is advisable to turn on the green lamp (c) when the feed motor 15 is started in step 1. In this way, during the standby of the processed material W, the raising of the transfer section 8 and the processing of the processed material W, the orange lamp (a), the red lamp (b) and the green lamp (c) are lit. It can be visually confirmed and work mistakes can be reduced.

【The invention's effect】

As is clear from the above description, according to the present invention, the transfer portion is moved up from the table in correspondence with the thickness of the processed material only at the time of processing, and is lowered at other times to approach the table. When carrying in, carrying out, or when not in use, the cutting tool provided on the table is covered by the transfer section and is not exposed to the outside, and there is an effect that the work can be performed safely.

[Brief description of drawings]

FIG. 1 is a perspective view showing a transfer device showing an embodiment of the present invention,
2 is an enlarged side view of the transfer section, FIG. 3 is a block diagram of the control circuit, and FIG. 4 is a flowchart thereof. 1: Frame, 2: Table, 3: Strut, 4: Cross frame,
5: Lifting screw, 6: Lifting motor, 7: Lifting frame, 8:
Transfer part, 9: case, 10: support shaft, 11: arm, 12: elastic body, 13: rotating shaft, 14: roller, 15: feed motor, 16: lever, 17: contactor, W: processed material. A: Ascending means, 20: Thickness sensor, 21: Forward rotation circuit, 22: Height sensor. B: transfer means, 23: stop circuit, 24: drive circuit. C: return means, 25: carry-out sensor, 2
6: Stop circuit, 27: Off-delay timer circuit, 28: Reverse rotation circuit.

Claims (4)

[Claims] 1. A lift frame that is moved up and down by a lift motor is provided above the table, and a transfer unit that is driven by a feed motor is provided below the lift frame to detect the thickness of a workpiece placed on the table. A height sensor that detects the amount of lifting of the lifting frame, and a carry-out sensor that detects the carry-out of the work material from the transfer unit.The signal of the thickness sensor is input to the lifting motor to lift the frame. Inputting the signal of the height sensor, the conveying means for inputting the signal of the height sensor to stop the elevation motor and driving the feed motor when the rising frame has risen by a predetermined amount, and the signal of the carry-out sensor. And a return means for stopping the feed motor and rotating the elevating motor in the direction in which the elevating frame descends. . 2. The control device for the work material transfer apparatus according to claim 1, wherein an off-delay timer circuit is provided in a stop circuit for stopping the feed motor of the returning means. 3. The control device for the work material transfer device according to claim 1, wherein the transfer portion is supported by the elevating frame so as to be vertically movable, and is urged downward by an elastic body. 4. A lever projecting downward is swingably provided in a front-rear direction on a front portion of an elevating frame located on a transfer start end side of a transfer portion, and the thickness sensor and the height sensor are operated by the lever. 4. The method according to claim 1, 2 or 3, wherein
A control device for the processing material transfer device described.