JPH0814493A - Safety device for tape cutting for auto taper - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a taper safety device for autotaper that prevents the injury of the finger due to the operation of the tapecutting blade when the finger is put in the taper outlet of the autotaper. [Structure] Foreign matter detection means provided at the tape outlet,
For example, it is configured to include a transmissive sensor, and a blade control unit that controls the operation of the tape cutting blade when a finger or the like is detected at the tape take-out port based on the output of the transmissive sensor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auto taper (tape is automatically cut into a certain length, which is used when packing and packaging with tape in the manufacturing industry, transportation industry, department store, etc. Tape feeding device) that comes out of the safety device.

[0002]

2. Description of the Related Art Generally, a tape reel around which a tape is wound is rotatably supported inside an auto-taper case, and the end of the tape is passed through a tape outlet provided in a part of the case. It is designed to be pulled out of the case.

A reflective tape sensor is installed at the tape take-out port to detect the presence of the tape by shining light on one surface of the tape and reflecting the light from the tape. When the detection signal of the reflective tape sensor is on, it means that the tape is out of the tape outlet, and when it is off, it means that the tape is not out of the tape outlet.

Further, a tape cutting blade, which is driven by a motor and cuts the tape, is attached to the tape take-out port. The operation of the motor that drives the tape cutting blade is controlled by the output signal of the reflective tape sensor. That is, the tape cutting blade performs the automatic tape cutting operation only when the tape is ejected from the tape take-out port, and cuts the tape at the set length.

When the tape does not come out of the tape take-out port, the output signal of the reflection type tape sensor is turned off, and at this time, the drive motor for the tape cutting blade is stopped.

[0006]

However, in the auto taper having the above-mentioned structure, when the tape is jammed inside the auto taper, for example, the operation of the tape cutting blade is stopped and the user takes the tape take-out port. I put my finger inside and tried to pull it out by pinching the tip of the tape. In this case, when the user's finger interrupts the reflective tape sensor, the detection signal turns on and the tape is supplied in the same way as when the tape is being supplied, so the tape cutting blade performs the tape cutting operation, and as a result, it appears to the finger. It was a serious problem because he was injured.

Therefore, the present invention has a problem to be solved to realize a safe auto-taper in which the user is not injured even in the above case.

[0008]

In order to solve the above-mentioned problems, a tape cutting safety device for an auto taper according to the present invention detects the presence or absence of a tape at a take-out port and automatically cuts the tape for a predetermined length. It is an automatic taper which is fed out after being cut out and is provided with foreign matter detecting means for detecting a foreign matter and stopping the feeding operation at the take-out port.

Further, the foreign matter detecting means is provided with an operation / non-operation changeover switch;
It is composed of a transmission type sensor;
A reflection type sensor; the foreign matter detecting means is
The foreign matter is detected by image processing; the foreign matter detecting means is a tape-cutting safety device for an auto taper, which is composed of a touch sensor.

[0010]

The automatic taper tape cutting safety device constructed as described above operates as follows.

(1) Since foreign matter detecting means for detecting foreign matter is provided at the take-out port for taking out the tape, the tape cutting malfunctions even when the tape is stuck inside or when a finger or the like is inserted inside. Will be able to prevent.

(2) Since the foreign matter detecting means is provided with the changeover switch, the foreign matter detecting means can be easily driven for maintenance inspection and the like even when the foreign matter is not inserted.

(3) Since the foreign matter detecting means is composed of the transmission type sensor, it can be manufactured at low cost.

(4) Since the foreign matter detecting means is composed of the reflection type sensor, the structure can be simplified.

(5) Since the foreign matter detecting means detects the foreign matter by image processing, it becomes possible to accurately detect the shape of the foreign matter.

(6) Since the foreign matter detecting means is composed of the touch sensor, the tape cutting operation can be stopped by simply touching the vicinity of the take-out port.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tape cutting safety device for an auto taper according to the present invention will be described below with reference to the drawings. It should be noted that in the embodiment, the foreign matter detecting means using a transmissive sensor will be described. FIG. 1 shows the appearance of an auto-taper to which the safety device according to the present invention is applied, and FIG. 2 shows the configuration of the safety device.

This auto taper 1A is shown in FIGS.
As shown in FIG. 1, a case 1, a tape reel 2 inside the case 1 that is supported by a rotation shaft in the left-right direction and is rotated by a motor, a tape 3 wound around the tape reel 2, and an input panel. 4, a tape take-out port 5 provided on the front surface of the case 1 for taking the tape 3 out of the case 1, a reflection type sensor 6 for tape detection provided below the tape take-out port 5, and a tape take-out port 5 Tape cutting blade 7 for moving tape up and down to cut tape 3
A blade driving unit 8 (see FIG. 2) that drives the tape cutting blade 7, a push button 9, a transmissive sensor 10 (see FIG. 2) installed in the tape ejection port 5, and a tape ejection port 5 Sensor operation switch 1 attached to the bottom
1 and a blade control unit 12 that controls the operation of the tape cutting blade 7 based on the output signal of the transmissive sensor 10 (see FIG. 2).
It consists of and.

Of the above, the transmissive sensor 10, the sensor operation switch 11, and the blade control unit 12 constitute a safety device according to the present invention.

As shown in FIG. 1, the latter half of the case 1 of the auto-taper 1A is formed in a concave cross section in the left-right direction, and a groove portion having the width of the tape 3 is provided in the front-rear direction. The tape reel 2 is fitted in the rearmost portion of the groove and is rotatably supported. The shaft of the tape reel 2 is rotationally driven by a motor (not shown). The rotation of this motor is controlled by the tape cutting blade 7
It is controlled by the blade control unit 12 (see FIG. 2) together with the blade drive unit 8 (see FIG. 2).

The motor of the tape reel 2 has a blade controller 12
The tape 3 is rotated so as to be fed out from the tape take-out port 5 according to the tape cut length set by the input panel 4. The tip of the tape 3 wound around the tape reel 2 passes through the lower part of the groove and is taken out of the case 1 through the tape take-out port 5.

The input panel 4 is provided on the surface of the case 1, and has a key for the user to set the tape cutting length, a display for displaying the set length, and a tape cutting operation instruction. It consists of a push button and the like. The input panel 4 is connected to the blade control unit 12, and by this,
A signal indicating the tape cut length set by the user on the input panel 4 is output to the blade control unit 12, and the length data is displayed on the display.

A square tape take-out port 5 is provided at the center of the front part of the case 1, and a reflective sensor 6 and a tape cutting blade 7 are provided in a portion surrounding the tape take-out port 5.
The transmissive sensor 10 and various circuits for operating these are housed.

The reflective sensor 6 is installed below the tape take-out port 5, emits light from below the tape 3 taken out from the tape take-out port 5, and receives light reflected from the lower surface of the tape 3. Has a function of detecting the presence of the tape 3.

The output signal of the reflection type sensor 6 is supplied to the blade control unit 12. During normal use of the auto taper, the tape 3 is in the state of being ejected from the tape take-out port 5, so that the tape detection signal of the reflection type sensor 6 is turned on.
When the detection signal of the reflective sensor 6 is ON, the blade control unit 12 controls the tape cutting blade 7 to control the input panel 4
The tape cutting operation is performed with the tape cutting length set from.

If the tape 3 on the tape reel 2 runs out, or if the tape 3 gets stuck inside the case 1 for some reason and does not come out from the tape take-out port 5, the reflection type sensor 6 does not detect the tape 3, its detection signal is turned off. In this case, the blade control unit 1
2 stops the operation of the tape cutting blade 7.

The tape cutting blade 7 has a sharp blade having a width of the tape 3 which is arranged at a right angle to the length direction of the tape 3 and horizontally at the tape take-out port 5, and the blade driving unit 8 moves the blade up and down. Thus, the tape 3 is cut.

The blade drive unit 8 is controlled by the blade control unit 12 and has a function of cutting the tape 3 from the tape take-out port 5 by driving the tape cutting blade 7 in the vertical direction.

The push button 9 is a switch that the user presses when the auto taper starts the tape cutting operation, and thereby power is supplied to the internal circuit.

The transmissive sensor 10 includes a light emitting portion 10A and a light receiving portion 1 which are respectively installed on the left and right sides of the tape outlet 5.
It consists of 0B. If nothing exists between the light emitting unit 10A and the light receiving unit 10B, the light emitted from the light emitting unit 10A is received by the light receiving unit 10B, and as a result, the output of the light receiving unit 10B is turned off.

However, when there is a user's finger or the like between the light emitting portion 10A and the light receiving portion 10B, the light emitted from the light emitting portion 10A is blocked by the finger or the like and is not received by the light receiving portion 10B.
As a result, the output of the light receiving unit 10B is turned on.

As shown in FIG. 2, the light emitting section 10A of the transmissive sensor 10 is composed of a series circuit of a light emitting diode D1 and a resistor R1. In addition, the transmissive sensor 10
The light receiving section 10B is composed of a series circuit of a phototransistor Tr1 and a resistor R2.

The light emitted from the light emitting diode D1 of the light emitting portion 10A is input to the base of the phototransistor Tr1 of the light receiving portion 10B and turned on if there is no obstacle.
When the phototransistor Tr1 is turned on, the resistor R2
A voltage is generated at both ends of. This voltage indicates that no foreign matter such as a finger is interposed between the light emitting unit 10A and the light receiving unit 10B, and the output of the transmissive sensor 10 is said to be off at this time.

Further, when a foreign substance such as a finger is interposed between the light emitting portion 10A and the light receiving portion 10B, light is not input to the base of the phototransistor Tr1 and the phototransistor Tr1 is turned off. The voltage of the container R2 is zero, and the output of the transmissive sensor 10 is said to be on at this time.

The emitter of the phototransistor Tr1 is
Analog switch SW1 which is a changeover switch
Is connected to the terminal T13. This analog switch SW1 uses an IC (for example, TC4066), and when the input voltage level of the input terminal T13 is a predetermined value, the terminal T
1 and T2 are connected to each other, and when the input voltage level of the input terminal T13 is 0, the terminals T1 and T2 are opened.

Terminals T1 and T2 of the analog switch SW1
Are connected to the input terminals a and b of the blade control unit 12, respectively. The inputs of the input terminals a and b of the blade control unit 12 are turned off when the input terminals a and b are closed, and turned on when they are open.

The output signal of the reflective sensor 6 is input to the input terminal c of the blade control unit 12. Further, a setting input signal from the input panel 4 is input to the input terminal d of the blade control unit 12. A drive signal is output from the output terminal e of the blade controller 12 to the drive circuit of the tape reel 2. Further, the output terminal f of the blade control unit 12 is connected to the input terminal of the blade drive unit 13.

The blade control unit 12 is composed of a microcomputer and contains the following programs. That is, (1) when the tape detection signal from the reflection type sensor 6 to the input terminal c is on (there is a tape), it is regarded as normal, and the tape cut length setting signal from the input panel 4 to the input terminal d. Based on the above, drive signals are output to the drive circuit of the tape reel 2 and the blade drive unit 13, respectively, and the tape cutting operation is performed.

(2) When the tape detection signal from the reflection type sensor 6 to the input terminal c is OFF (no tape), the blade controller 12 and the blade driver 8 of the tape reel 2 are stopped. A signal is output and the drive of the tape cutting blade 7 is stopped.

(3) When the sensor operation switch 11 is turned on when the tape cutting blade 7 is stopped, the input signal from the transmissive sensor 10 to the input terminals a and b is checked. (4) When the input signals to the input terminals a and b are off, it is determined that there is no user's finger or the like in the tape outlet 5, and the above (1) or (2) is performed.

(5) When the input signals to the input terminals a and b are on, it is judged that there is a finger or the like at the tape take-out port 5, and a drive prohibition signal is output from the output terminal f for tape cutting. The operation of the blade 7 is prohibited.

The overall operation of the safety device of the auto taper 1A will be described with reference to the flow chart shown in FIG.

When the switch 9 is pressed after confirming the remaining amount of the tape 3 on the tape reel 2, power is supplied to the internal circuit and the automatic taper 1A becomes movable. Specify the tape cut length with the input panel 4 and enter the input panel 4
Press the tape cut operation start button.

The blade control unit 12 checks whether or not there is a finger or the like at the tape take-out port 5 based on the output of the transmissive sensor 10 (step ST1). Initially, since the sensor operation switch 11 is not operated, the output signal of the transmissive sensor 10 is off, so step ST2.
Go to.

In step ST2, the detection signal of the reflection type sensor 6 is checked to see if the tape 3 is supplied from the tape take-out port 5. When the tape 3 is coming out of the tape take-out port, the output of the reflection type sensor 6 is on, and therefore the tape cutting operation of step ST3 is repeated until the supply of the tape 3 is exhausted.

During tape cutting operation, tape 3 is case 1
If the inside of the tape is clogged and the tape does not come out from the tape outlet 5, the detection signal of the reflection type sensor 6 is turned off. At this time, step ST4 is skipped and the operation of the tape cutting blade 7 is stopped.

Here, when the user inspects the inside of the case 1 and tries to pull out the tape 3, the user pushes the sensor operation switch 11. As a result, the transmissive sensor 10 operates, and the safety device is in an operating state.

When the sensor operation switch 11 is pressed (step ST5), the process returns to step ST1 to check the output signal of the transmissive sensor 10. At this time, if a finger or the like is present at the tape take-out port 5, the transmissive sensor 1
Since the output of 0 is turned on, the process jumps to step ST4 to keep the operation of the tape cutting blade 7 stopped. Then, the tape cutting blade 7 is maintained in the stopped state until the output signal of the transmissive sensor 10 is turned off.

Therefore, unless the foreign matter existing in the tape take-out port 5 is removed, the tape cutting blade 7 does not operate and the tape 3 can be taken out safely. And
When it is confirmed that the tape 3 is set in the tape take-out port 5 again and there is no finger or the like at the tape take-out port 5, the tape cutting operation is repeated.

The transmissive sensor 10 employed in the foreign matter detecting means in the above embodiment is not limited to infrared rays, but may be a radio wave, pyroelectric effect, sonic sensor or the like. Is.

In the case of a sonic sensor, it is possible to have a structure that exerts its power in an environment with a lot of dust and the like.

Further, the foreign matter detecting means may be a reflection type sensor, and in this case, it may have the same structure as the reflection type sensor for tape detection, and is also used as the reflection type sensor for tape detection. You may Furthermore, it goes without saying that ultrasonic waves or the like may be used.

Further, the foreign matter detecting means may detect foreign matter by image processing. In this case, it is possible to adopt a configuration in which the detection of what the foreign matter is can be accurately analyzed.

Further, the foreign matter detecting means may be a touch sensor. In this case, the tape cutting operation can be stopped by simply touching the vicinity of the take-out port.
It goes without saying that this touch sensor can utilize heat sensitivity, electrostatic capacitance, electrostrictive elements, and the like.

[0055]

With the above-described structure, the taper safety device for auto taper according to the present invention has the following effects.

(1) By providing foreign matter detecting means for detecting foreign matter at the take-out port for taking out the tape, the operation of cutting the tape even when a finger or the like is inserted inside, when the tape is jammed inside It has an extremely excellent effect that it can prevent and improve the safety.

(2) Since the foreign matter detecting means is provided with the changeover switch, it is possible to easily observe a normal driving state and make adjustments, which is a very excellent effect.

(3) Since the foreign matter detecting means is composed of a transmission type sensor, it has an extremely excellent effect that the structure can be made inexpensive and simple.

(4) Since the foreign matter detecting means is composed of the reflection type sensor, it has an extremely excellent effect that the structure can be simplified.

(5) The foreign matter detecting means detects the foreign matter by image processing, so that the shape of the foreign matter is accurately detected, and for example, the drive is determined to be the insertion of a finger or the like. It has an extremely excellent effect that the control can be performed accurately and the safety can be improved.

(6) Since the foreign matter detecting means is composed of a touch sensor, even if a defective cutting of the tape occurs, the operation of cutting can be stopped simply by touching the take-out port, which is safe. It has an extremely excellent effect that the property can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an appearance of an embodiment of an auto taper according to the present invention.

FIG. 2 is a block diagram showing the configuration of an embodiment of a tape cut safety device for auto taper according to the present invention.

FIG. 3 is a flowchart showing the operation of the embodiment.

[Explanation of symbols]

 1 Case 1A Auto-taper 2 Tape reel 3 Tape 4 Input panel 5 Tape ejection port 6 Tape detection reflective sensor 7 Tape cutting blade 8 Blade drive unit 10A Light emitting part of transmissive sensor 10B Light receiving part of transmissive sensor 10 11 sensor operation switch 12 blade control unit

Claims (6)

[Claims] 1. An auto taper for detecting the presence or absence of a tape at an outlet and automatically feeding and cutting the tape for a predetermined length and supplying the tape, and detecting and supplying a foreign substance to the outlet. A tape-cut safety device for auto taper, which is provided with a foreign matter detecting means for stopping the operation. 2. The taper safety device for automatic taper according to claim 1, wherein the foreign matter detecting means is provided with an operation / non-operation changeover switch. 3. The tape taper safety device for auto taper according to claim 1, wherein the foreign matter detecting means is constituted by a transmission type sensor. 4. The tape-cutting safety device for an auto taper according to claim 1, wherein the foreign matter detecting means is a reflection type sensor. 5. The automatic taper tape cutting safety device according to claim 1, wherein the foreign matter detecting means detects foreign matter by image processing. 6. The tape-cut safety device for an auto taper according to claim 1, wherein the foreign matter detecting means is a touch sensor.