JPH0493707A - Form-dimension detecting method - Google Patents

Abstract

PURPOSE:To prevent erroneous detection and to make it possible to improve detecting accuracy by providing a constitution wherein light is sequentially emitted alternately from a plurality of light emitting elements which are aligned along the detecting direction of the dimension of a form, and the dimension of the form is detected based on the position of the light emitting element which has emitted the light when the light receiving state of the photodetector is changed. CONSTITUTION:In a detecting device 20, light emitting elements 22 and photodetectors 23 are alternately arranged along the width direction of a continuous form 16. A detection control circuit 26 performs the control so that the light is sequentially emitted alternately from the light emitting element 22 at the left end with a light-emitting-element driving circuit 24. The reflected light from the form 16 is received with the photodetector 23. When the light receiving state is changed, the size of the width of the form 16 from the position of the element 22 which has emitted the light is detected. The numbers are sequentially assigned to the elements in the integer-number mode with the circuit 26. The number Kn of the element 22 which has emitted the light this time is counted in a counter part 27. In the case wherein the counted value when the photodetector 23 is turned ON from OFF is Ki and the counted value when the photodetector 23 is turned OFF from ON is Ks, the width size W of the form 16 is operated in an operating part 28 by the specified expression in the circuit 26.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Field of Industrial Application)] The present invention relates to a method for detecting form dimensions such as in a form processing device.

(Prior Art) In a conventional form dimension detection method, a plurality of light emitting elements and a plurality of light receiving elements are respectively disposed along the direction of detecting the dimensions of the form, and the light emitted from the light emitting elements is detected at the end of the form. Reflected light or transmitted light is received by these light receiving elements, and the dimensions of the form are detected based on the light receiving state of these light receiving elements.

At this time, in the conventional form size detection method, all the light emitting elements are made to emit light at the same time, the light receiving state of each light receiving element is determined individually, and the light receiving state of the adjacent light receiving element is changed between on and off. The dimensions of the form are detected from the position.

(Problem to be solved by the invention) However, the prior art has the following problems.

■A large current power supply is required to cause all light emitting elements to emit light at the same time.

(2) It is necessary to individually determine the light-receiving state of each of the light-receiving elements, and the determination operation is complicated.

■From the above (■) and (2), the cost required for equipment will be high.

■In addition, when adopting a reflective light receiving method in which the reflected light emitted from the light emitting element is received by the light receiving element, as a result of the diffused reflection of the reflected light at the end of the form, the light received at the position corresponding to the actual end of the form is There is a risk that not only the element will receive light, but also a light receiving element located further outside will receive light. For this reason, the position where the light receiving state of the adjacent light receiving element changes from on to off may deviate outward from the end position of the form, and there is a possibility of erroneous detection such that the form size is detected to be larger than it actually is. However, it is difficult to improve the detection accuracy.

The present invention does not require a large current power source when detecting a form dimension using a light emitting element and a light receiving element, and simplifies the operation of determining the light receiving state, thereby making it possible to implement the device at low cost. The purpose is to

In addition, in the present invention, when a reflective light reception method is adopted, erroneous detection due to diffused reflection of reflected light at the end of the form is prevented,
The purpose is to improve detection accuracy.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a light emitting element and a light receiving element arranged along the dimension detection direction of the form, and reflection of light emitted from the light emitting element at the end of the form. In a form size detection method, the method comprises: receiving light or transmitted light by the light receiving element, and detecting the size of the form based on a change in the light receiving state of the light receiving element;
A plurality of the light emitting elements are arranged along the dimension detection direction of the form, each light emitting element emits light in turn, and the size of the form is determined from the position of the light emitting element that emitted light when the light receiving state of the light receiving element changes. It is something that is designed to be detected.

(Function) In the present invention, each light emitting element is sequentially and alternately emitted light while monitoring the light receiving state of the light receiving element, and when any light emitting element emits light, the light receiving element changes from on to off, or from off to off. On the condition that it is turned on, it is recognized that the end of the form corresponds to the position of the light emitting element, and the size of the form is detected from the position of the light emitting element. Therefore, according to the present invention, there are the following effects (1) to (4).

Since the light-emitting elements emit light one by one, a large current power source is not required.

■Dimension detection of the form is performed by detecting the position of the light emitting element that emitted light when the change occurred, even if any of the light receiving elements installed within the size detection area of the form changes its light receiving state. It is done based on 1. Therefore, the operation for determining the light receiving state can be performed by simply determining whether or not the light receiving state of any of the light receiving elements has changed. The determination operation can be simplified. Note that a single light receiving element may be used as long as it can cover the dimension detection area of the form.

■The device can be manufactured at a lower cost than the above ■ and ■.

■In addition, when adopting a reflective light receiving method in which the reflected light emitted from the light emitting element is received by the light receiving element, the reflected light from the end of the form may be diffusely reflected, and the light receiving element located at the position corresponding to the actual end of the form may be reflected. There is no possibility of false detection even if a phenomenon occurs in which not only light is received, but also light is received by a light receiving element located further outside, because the present invention detects whether the light receiving state of adjacent light receiving elements is on or off. The detection standard is not based on the position of the light-emitting element that emits light when the light receiving state changes, that is, when the light-receiving state changes, that is, when there is a switch between reflection and non-reflection, the presence of the form is detected. 1 (form end part IF)
) can be accurately identified. Therefore, when the reflective light reception method is adopted, erroneous detection due to diffused reflection of reflected light at the end of the form can be prevented, and detection accuracy can be improved.

(Example) Figure 1 is a schematic diagram showing an example of the present invention, Figure 2 (A)
- (E) are schematic diagrams showing the arrangement of light emitting elements and light receiving elements, Figure 3 is a side view showing the foam processing line, and Figure 4 is a schematic diagram showing the arrangement of light emitting elements and light receiving elements.
FIG. 5 is a perspective view of the main part of the figure and a schematic diagram showing another embodiment of the present invention.

The form processing line shown in FIGS. 3 and 4 has a bin tractor 12, an infeed roller 13, and an outfeet roller 14, which are driven synchronously by a servo motor 11, and a burst plate 15. It is configured. The bin tractor 12 feeds the continuous form 16 by engaging the marginal punch of the continuous form 16. The continuous foam 16 is rolled down by the burst blade 15 between the infeed roller 13 and the outfeet roller 14, and is pulled by the outfeet roller 14, which is faster than the infeed roller 13, and separated at the perforation. Form 17 is obtained.

However, on the entry side of the bin tractor 12, a form size detection device 20 using a reflection receiving method is installed.

As shown in FIGS. 1 and 2(A), the form dimension detection device 20 includes a light emitting element 22 and a light receiving element 2 on the upper surface of a substrate 21.
3, a light emitting element drive circuit 24, a light receiving element input circuit 25, and a detection control circuit 26. The detection control circuit 26 includes a counter section 27 and a calculation section 28.
have.

At this time, the form dimension detection device 20 detects the continuous form 1.
Along the width direction, which is the dimension detection direction of 6, the light emitting element 22
and a plurality of light receiving elements 23 are arranged alternately. In this embodiment, the detection control circuit 26 causes the light emitting element drive circuit 24 to sequentially and alternately emit light from the light emitting element 22 at the left end in the figure, and receives the reflected light from the continuous form 16 by each light receiving element 23. The width dimension of the continuous form 16 is detected from the position of the light emitting element 22 that emits light when the light receiving state of the element 23 changes. In addition, the detection control circuit 2
The light receiving elements 23 are connected in parallel to each other.

For example, the detection control circuit 26 sequentially numbers the light emitting elements 22 arranged from one side to the other side on the substrate 21 using integer numbers, and the number K of the light emitting element 22 that emitted light this time.
The counter unit 27 counts n. Then, the detection control circuit 26 calculates whether the count value of the counter section 27 when each light receiving element 23 is turned on from off is 1, or the count value of the counter section 27 when each light receiving element 23 is turned from on to off, or Ks.
When this is the case, the calculation unit 28 calculates the width dimension W of the continuous form 16 using the following equation (1).

W = (Ks−Ki) xp・
(1) However, P is the pitch interval between adjacent light emitting elements 22.

The detection results of the form dimension detection device 20 are used, for example, as drive information for the bin tractor adjustment device 30. As shown in FIG. 4, the bin tractor adjusting device 30 adjusts the set positions of the left and right bin tractors 12 in the line width direction. At this time, the cylindrical camshaft 32 that is engaged with the cam followers 31 integrated into the left and right bin tractors 12 is rotatably supported by the machine frame 33, and the pulley 34 and the stepper fixed to the machine frame 33 are rotatably supported. motor 3
A belt 37 is stretched between the pulley 36 of No. 5 and the pulley 36 of No. 5. As a result, the stepping motor 35 of the bin tractor adjustment device 30 is driven and controlled based on the detection result of the form dimension detection device 20, so that the set positions of the left and right bin tractors 12 match the marginal punch positions on both sides of the continuous form 16. Second, the bin tractors 12 are moved in the line width direction. Incidentally, the bin tractors 12 are moved to face each other while being equally distributed in the left and right directions from the center of the line.

Next, the operation of the above embodiment will be explained.

In the above embodiment, each light emitting element 22 is sequentially and alternately emitted light while monitoring the light receiving state of the light receiving element 23,
This corresponds to the end portion of the continuous form 16 or the position of the light emitting element 22, provided that any of the light receiving elements 23 is turned from on to off or from off to on when any of the light emitting elements 22 emits light. Recognizing this, the width dimension of the continuous form 16 is detected from the position of the light emitting element 22. Therefore, according to the above embodiment, the following ■～■
There are some effects.

■Since the luminescent sweets 22 are made to emit light one by one,
Does not require large current power supply.

■Dimension detection of the continuous form 16 is performed so that, even if any of the light receiving elements 23 installed within the dimension detection area of the continuous form 16 changes its light receiving state, it will emit light when the change occurs. This is done based on the position of the light emitting element 22. Therefore, the operation of determining the light receiving state only needs to be performed by determining whether or not the light receiving state of any of the light receiving elements 23 has changed, and does not need to be performed for each of the plurality of light receiving elements 23. Therefore, the operation of determining the light reception state by the detection control circuit 26 can be simplified.

■The device can be manufactured at a lower cost than the above ■ and ■.

■The phenomenon in which the reflected light from the end of the continuous form 16 is diffusely reflected, and the light is not only received by the light receiving element 23 located at the position corresponding to the actual end of the form, but also received by the light receiving element 23 located further outside. Even if this occurs, there is no possibility of false detection. Because it's a foam size detection bag! 20 is the adjacent light receiving element 2
The detection standard is not the position where the light receiving state changes from on to off as described in 3, but the position of the light emitting element 22 that emits light when the light receiving state changes, that is, when a switch occurs between reflection and non-reflection. Continuous form 16
It is possible to accurately identify the position where the presence or absence of reflection is switched (the end position of the continuous form 16) due to the presence or absence of the reflection. Therefore, erroneous detection due to diffused reflection of reflected light at the ends of the continuous form 16 can be prevented, and detection accuracy can be improved.

FIGS. 2(B) to (E) show the light emitting element 22 and the light receiving element 23.
FIG. 4 is a schematic diagram showing a modification of the arrangement of the .

Figure 5 shows a form dimension detection device 4 using a transmission light receiving method.
0, and substrates 41 and 42 are installed at the upper and lower two positions sandwiching the dimension detection area of the continuous form 16, and the substrate 41 has a plurality of light emitting lights in the width direction, which is the dimension detection direction of the continuous form 16. The elements 43 are arranged, and a plurality of light receiving elements 44 are arranged on the substrate 42 in the width direction, which is the direction in which the dimensions of the continuous form 16 are detected. In this case as well, the form dimension detection device 2 using the reflection light receiving method shown in FIG.
The effect is substantially the same as the effect of ① to ②, which is performed by 0.

[Effects of the Invention] As described above, according to the present invention, when detecting a form dimension using a light emitting element and a light receiving element, a large current power source is not required, and the operation for determining the light receiving state is simplified.
It can be made into a device at low cost.

Further, according to the present invention, when a reflective light receiving method is adopted, it is possible to prevent false detection due to diffuse reflection of reflected light at the end of the form and improve detection accuracy.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing an embodiment of the present invention, Figure 2 (A)
- (E) are schematic diagrams showing the arrangement of light emitting elements and light receiving elements, Figure 3 is a side view showing the foam processing line, and Figure 4 is a schematic diagram showing the arrangement of light emitting elements and light receiving elements.
FIG. 5 is a perspective view of the main part of the figure and a schematic diagram showing another embodiment of the present invention. 16... Continuous form, 20... Form dimension detection device, 22... Light emitting element, 23... Light receiving element, 26... Detection control circuit, 40... Form dimension detection device, 43... - Light emitting element, 44... Light receiving element.

Claims (1)

[Claims] (1) A light-emitting element and a light-receiving element are arranged along the dimension detection direction of the form, and the light-receiving element receives reflected light or transmitted light at the edge of the form of the light emitted from the light-emitting element, and the light-receiving element In the foam dimension detection method of detecting the dimensions of the foam based on changes in the light reception state of the foam, a plurality of the light emitting elements are arranged along the dimension detection direction of the foam, each light emitting element sequentially and alternately emits light, A method for detecting the size of a form, comprising detecting the size of the form from the position of a light emitting element that emits light when the light receiving state of the light receiving element changes.