JP3486320B2 - Slot hole measuring device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for measuring the position and inclination direction of slot holes obliquely provided with respect to the longitudinal direction of a strip.

[0002]

2. Description of the Related Art In some cases, it is necessary to measure the position, inclination, etc. of a groove, a slot, a figure or the like that extends obliquely with respect to the length direction of a thin thin piece. For example, processing such a slot hole is necessary for processing a slot hole in a laminated tape of a leaky coaxial cable. Further, in this laminated tape, it is necessary to process a plurality of slot holes having a certain pattern in order to maintain the uniformity of the intensity of leaked radio waves. Conventionally, a method of punching multiple holes at the same time using a total die has been adopted, but the structure of the die becomes complicated, the die cost becomes huge, the cost is low, and the accuracy of each hole is increased. It was a disadvantage.

[0003]

One slot hole is provided with one slot hole.
If it is a method of punching with one mold, suppressing the rise of mold cost,
While it has the advantage of being able to improve the hole accuracy, it is necessary to improve the reliability of the hole spacing and pitch, and it is desirable to be able to automatically measure and guarantee the accuracy over the entire length of the tape.

[0004]

The object to be measured by the slot hole measuring device of the present invention is that the individual slot holes punched obliquely with respect to the length direction of the elongated piece are distributed over the entire length of the elongated piece. Since it is presumed that punching is performed sequentially with a set of molds predetermined according to the type of slot shape, the shape and dimensions change in a predetermined order, and that order does not change, the measuring device It is sufficient to measure the position of the hole from the reference point and the tilt direction. The measuring device includes a slot hole edge detection sensor having a measuring range extending in a direction perpendicular to the length of the strip in a range including one end of the slot hole, and arranged at regular intervals in a direction perpendicular to the length of the strip. It is composed of a slot hole inclination detection sensor including two edge detection sensors, and a device for measuring the positions where the outputs of these detectors are generated, that is, the feed length of the strip. When a plurality of slot holes are punched out in a certain pattern, the position of the above slot holes may be determined by using the position of one of the slot holes as a reference point. To do.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment will be described below by taking as an example a case where the slot hole of a laminate tape of a leaky coaxial cable is measured by measuring the amount of transmitted light of a projection light from a light source. As shown in FIG. 2, the slot hole of the laminate tape of the leaky coaxial cable has a plurality of slot holes 2 along the center line of the laminate tape 1 in order to maintain the uniformity of leaked radio waves. They are provided symmetrically so that they have the same arrangement when viewed from the side edge (arrow). The subscript AB for each hole indicates the type of hole. In order to have the same arrangement when viewed from the arrow directions on both sides, the arrangement must be symmetrical for each hole group.

One example of this hole group is shown in FIG.
Even if the lengths of the slot holes are the same, the distance from the tape side edge at the tip position will be different if the inclination is different. Therefore, in order to detect the hole tip with the photodetector, the detector must be able to detect the hole tip within a certain width D from the side edge. However, if the width is too wide, for example, in the range x, the transmitted light from the slot A and the transmitted light from the slot B overlap, and the signal processing becomes complicated. Therefore, the detection width D is selected so that such overlap does not occur. However, when it is difficult to avoid the overlap, such as the slot C, which includes slots having greatly different lengths and inclinations, the overlap is obtained by dividing the measurement range M of the main sensor and the measurement range S of the sub sensor. Can be avoided.

As shown in FIG. 2, when the right slanted slot groups and the left slanted slot groups are alternately arranged, the data obtained when the interval between the upper ends of the slot groups is measured is x _{1 in the} figure. , X ₂ , x ₃ , x ₁ , x ₂ , x ₃ ′ are obtained. As shown in FIG. 4, the shape of the slot is a circle having a length of l and an end having a radius of w, and an inclination angle with respect to the length direction of the tape is θ. The intervals d ₁ and d ₂ and the pattern pitch P are

[Equation 3] Is.

In the above calculation processing, + and-of y change depending on whether the slot is tilted right or left. In order to detect this inclination, a photodetector for detecting the slot edge is arranged at two points that are separated at a right angle to the length direction of the tape, and if the edge near the center of the tape is detected first, it goes down to the right. If the tape edge or the edge near the edge of the tape is detected first, it is determined that the tape is inclined to the left.

[0009]

The present invention will be described in detail below with reference to examples. FIG. 1A is a conceptual diagram showing the configuration of one embodiment of the slot hole measuring device of the present invention, in which 1 is a slot hole 2
Is a punched laminated tape, which is transported in the direction of the arrow. 3 is an encoder for detecting the transfer amount, 4 is a projector of a hole pitch detection sensor having a width D, and 4 '
Is the receiver. Reference numeral 5 denotes a slot inclination detecting sensor provided at a position separated by L on the upstream side thereof, and comprises two sets of light projectors A and B and light receivers A ′ and B ′ thereof having a space in the width direction of the tape 1.

The signal from each sensor is shown in FIG.
When the slot shown in (a) moves to the right in the figure, the output signal from the hole pitch detection sensor 4 is shown in (b), and the output from the tilt detection sensor 5 is shown in (c) and (d). When the signal of the output (d) of the inclination detection sensor, which is output preceding by the interval L, precedes the signal of (c), it indicates that the slot has a downward slope, and the pulse selection signal (ho ) Is turned off, and the falling pulse (g) of the hole pitch signal (b) is output as an edge pulse (h). This off state is maintained until the signal of (c) precedes the signal of (d). When the signal of (c) precedes the signal of (d), it indicates that the slot has a downward slope, the pulse selection signal (e) turns on, and the rising pulse of the hole pitch signal (b). (F) is output as an edge pulse (h). From this edge pulse (h) and encoder output, x ₁ as slot interval data,
x ₂ and x ₃ are obtained. Then, the arithmetic unit calculates according to the above equation to calculate the slot interval d and the pitch P. At this time, l, w, and θ are known and given as constants.

Due to the requirement of symmetry, the slot pattern is limited even when the number of slots is increased. An example thereof is shown in FIG. In the figure, A, B, and C indicate the types of slots, and slots having the same reference numerals have the same shape and the same inclination angle. Even if the pattern becomes complicated,
Due to the above-mentioned symmetry requirement, the slots at both ends of each slot group are of the same type, and from the relationship of d ₁ + d ₂ + d ₃ + d ₄ ... = x ₁ + x ₂ + x ₃ + x ₄ ... If y of A is determined, the pitch P can always be obtained from the equation (1).

In the embodiment shown in FIG. 1, the inclination detection sensor is arranged upstream of the hole pitch detection sensor, but the hole pitch detection sensor 4 can also serve as the sensor A on the edge side of the inclination detection sensor. That is, the inclination detection sensor B is arranged on the tape center side of the hole pitch detection sensor 4 with a slight gap. The signal processing at this time may be the same as that described in the previous embodiment when the output of the sensor B precedes the output of the pitch detection sensor, that is, when the slot is inclined downward to the right. However, in the case of the downward slope, it is not possible to obtain a signal for switching the pulse selection signal. At this time, the pulse selection signal is switched on after the length of one group of slots has been transferred. In the embodiment, the sensor detects the amount of light transmitted through the slot by the light transmitter and the light receiver, but it may be of a type that detects reflected light or a type that detects a slot image. Instead, it is necessary to use such reflected light for application to what is a graphic pattern. Further, the present invention can be used not only for detecting the position of a plurality of slots as in the embodiment but also for detecting the position of only one slot.

[0013]

The slot hole measuring device of the present invention can easily detect the positions of all the slots by the above-mentioned configuration, and the hole gap and the pitch can be determined while punching the slots with one die. This enables a manufacturing method that is unprecedented in the past, in which the entire length of the laminated tape can be guaranteed.

[Brief description of drawings]

FIG. 1A is a configuration of a slot hole measuring device of the present invention, and FIG. 1B is a conceptual diagram showing a method of processing an output signal thereof.

FIG. 2 is a plan view showing an example of an arrangement of slot holes in a laminated tape of a leaky coaxial cable.

FIG. 3 is an explanatory diagram of a method for measuring slot holes according to the present invention.

FIG. 4 is a plan view showing the shape of a slot hole.

FIG. 5 is an explanatory diagram showing a possible arrangement of slot holes in a laminate tape of a leaky coaxial cable.

[Explanation of symbols]

1 Laminated tape 2 Slot hole 3 Encoder 4 Hole pitch detection sensor 5 Slot inclination detection sensor

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ identification code FI G01B 21/22 G01B 21/22 (58) Fields investigated (Int.Cl. ⁷ , DB name) G01B 21/00-21/32 G01B 11/00-11/30

Claims (6)

(57) [Claims] 1. The measuring device is arranged in a range including one end of the slot hole, the edge detection sensor for the slot hole extending in a direction perpendicular to the length of the strip, and the sensor being arranged at a constant interval in the direction perpendicular to the length of the strip. A tilt detection sensor of the slot hole including two edge detection sensors, and the positions where the outputs of these detectors are generated,
That is, a slot hole measuring device comprising a device for measuring the feed length of a strip. 2. The slot hole measuring device according to claim 1, wherein a plurality of slot holes are punched in a fixed pattern in the strip, and the distance between the slot holes is measured. 3. The slot hole measuring device according to claim 1, wherein the detection range of the edge detection sensor of the slot hole is selected so as not to include a plurality of slot holes within the range. 4. The slot hole measuring device according to claim 3, wherein a detection range of the edge detection sensor of the slot hole is divided into a measurement range of the main sensor and a measurement range of the sub sensor. 5. When right-slotted slot groups and left-sloped slot groups are alternately arranged, data x ₁ , x ₂ , x _3, ... When measuring the intervals between the one ends of the slot groups.
From x ₁ , x ₂ , x ₃ '... However, the length of the slot is 1, the radius of the end is w, and the inclination angle with respect to the length direction of the tape is θ, which are given as known numerical values. The subscripts 1 and i represent the order of slots. The slot hole measuring device according to any one of claims 1 to 4, wherein the slot spacing d of the slot group is obtained by 6. When right slanted slot groups and left slanted slot groups are alternately arranged, data x ₁ , x ₂ , x _3, ...
From x ₁ , x ₂ , x ₃ '... However, the length of the slot is 1, the radius of the end is w, and the inclination angle with respect to the length direction of the tape is θ, which are given as known numerical values. The subscripts 1, i, n indicate the order of slots. The slot hole measuring device according to any one of claims 1 to 4, wherein the pitch P of the slot group is obtained by