JPH01282402A - Core position detector for wound-shaft part such as coil - Google Patents

Abstract

PURPOSE:To enable accurate detection of a position of a core, by operating multiple sets of photoelectric switches for detecting the core by one set sequentially to detect the position of the core with the repetition of the operation. CONSTITUTION:Opening-closing operation is repeated with make contacts T1-T2 at a specified time interval to emit light at a specified time interval from projectors PH'1-PH'4. At time t1 and t2, even when the contacts T1 and T2 are turned ON, light receivers PH''1 and PH''2 fail to be turned ON and none of relay coils X1 and X2 is energized when a core does not exist at the position of photoelectric switch. Now at time t3, the contact T3 is closed to emit light with a projector PH'3 and when light from the projector PH'3 is intercepted by a core, the light receiver PH''1 is turned ON while the contact T1 is not closed, hence energizing none of the coil X1. At time t4, when the contact T1 is closed, the light receiver PH''1 is turned ON and current flows through the coil X1 to excite the coil X1. Thus, it is displayed that the core is located at a position where the core intercepts an upper photoelectric switch.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device for detecting the position of a winding core of a shaft-mounted object such as a coil, and particularly for mounting a hollow coil or a winding core of a coil on an unwinding shaft, etc. The present invention relates to a positioning device.

[Conventional technology]

Conventionally, the Utility Model Application No. 57-7 was used as a device for taking out shaft-mounted objects such as coils or winding cores from, for example, a cantilever type feeding shaft.
The technique disclosed in Japanese Patent Application No. 4323 is known, and the applicant proposed this improved technique in Japanese Patent Application No. 32341/1983.

The coil formed by winding the web is placed on a coil car and conveyed to the unwinding shaft, where it is accurately positioned vertically and horizontally by the coil core beam and set on the unwinding shaft. Conventionally, as shown in FIG. 5, two sets of upper and lower photoelectric switches 14 and 16 are arranged opposite each other so that the light travels in opposite directions so as to project light along the inner periphery of the winding core 12 of the coil 10. The position of the winding core 12 is confirmed by detecting the upper or lower limit of the inner circumference of the winding core 12 and controlling the lifter 18 based on this. Photoden sui here,
The reason why the positions of the light projector and light receiver of 7chi 14.16 are reversed is to prevent light interference.

[Problem that the invention seeks to solve]

In the conventional method, the detection of the positional deviation of the winding core 12 in the left and right direction can be taken care of by adding left and right position detection photoelectric switches only when there is no interference between the photoelectric switches. However, if the tube is thin or if the optical axis of the photoelectric switch is distorted due to vibrations, light interference will occur and detection will become impossible.

-The present invention was made in view of these circumstances, and
The purpose of the present invention is to propose a device for detecting the position of a winding core of a shaft-mounted object such as a coil, which can measure the position of the winding core of a coil or the winding core of a coil using four sets of photoelectric switches on the upper, lower, left, and right sides without interference of light. .

[Means for solving problems]

The present invention provides a winding core position detection device for a shaft-mounted object such as a coil, which detects the position of the winding core by arranging a plurality of sets of sensors each consisting of a light emitter and a light receiver at both ends of the winding core of a shaft-mounted object such as a coil. ,
a control unit that repeatedly causes the light emitters to emit light while sequentially shifting the light emission timing of the light emitters of the plurality of sets of sensors at regular time intervals; and a determination unit that determines the position of the winding core based on the output results of the light receivers of the plurality of sensor sets. It is characterized by consisting of the following parts.

[Effect]

In the winding core position detection device for a shaft-mounted object such as a coil according to the present invention, the four sets of photoelectric switch projectors for detecting the winding core (upper, lower, left and right) are operated one set at a time while controlling the timing using a control jlU circuit. Since it is repeated sequentially in time, the position of the winding core can be detected without light interference between the detectors.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a winding core position detection device for a shaft-mounted object such as a coil according to the present invention will be described in detail below with reference to the accompanying drawings.

4 to detect the inner circumference of the winding core 20 as shown in FIG.
Set of photoelectric switches PH+, PHZ, PH3, PH4
is located. That is, there is a photoelectric switch PH+ above.
is arranged, a photoelectric switch PH2 is arranged on the left side, a photoelectric switch PH3 is arranged on the lower side, and a photoelectric switch PH4 is arranged on the right side. Each photoelectric switch PH,
~PH4 is the projector PH,'~PH,' as shown in the figure.
and light receiving, iPH, to PH4'. These four sets of photoelectric switches P H+ , P'H2, P H
3, PH, is operated by the sequence circuit shown in FIG.

In FIG. 2, L indicates a power line and L2 indicates an earth line. In the light projecting section shown in FIG.
...T4 indicates the make contact, and the PH.

'...PH4' indicates a light emitter of a photoelectric switch. The make contact T1 and the light emitter P H,' of the upper photoelectric switch PH3 are connected in series between the power supply line L1 and the upper ground line 2, and the make contact lower 2 - the light emitter P in the same way.
H,', make contact T3-projector PH,', and make contact T4-projector PH4' are connected in series.

In addition, in the light receiving part, the light receiver PH of the photoelectric switch,
...PH,” is the power line L1 and the ground line 2
are connected in parallel between.

Furthermore, in the display section of FIG. 2, the make contact T1, the light receiver PH,'', the relay coil
are connected in series, break contact TIC and make contact Z
I are connected in series, and the break Tlc-make contact Z1 is connected in series with the make contact T1-light receiver PH,''.
are connected in parallel. Below, make contact T2...
T4, receiver PH2'...P Ha'', relay coil X2...X4, break contact 'rzc...T4 and make contact Z2...Z4 are connected in the same manner as shown in the figure. Incidentally, the light receivers PH, "...PH4" are turned on when light is blocked by the winding core 20.

The operation of the embodiment of the position detecting device for the winding core of a shaft-mounted object such as a coil according to the present invention constructed as described above will be explained with reference to the timing chart of FIG. First, make contact T1.
...T4 repeats opening and closing operations at predetermined time intervals, and accordingly, the floodlights PH,'...PH4'' emit light at predetermined time intervals.At times t1 and t2, the make contact T
+, even if T2 is ON, the photoelectric switches PH,,P
When the winding core 20 is not present at the position H2, the light receiver PH,
", PH2" is not turned on and relay coils XI and X2 are not energized.

At this moment, the make contact T3 closes and the emitter P
H3' emits light, and the light from this projector PHz' is sent to the winding core 2.
Suppose that the light is blocked by 0. As a result, the receiver PH,
becomes ON. However, at time t, the make contact T is not closed, so there is 1ll in each relay coil.
No power is applied.

On the other hand, when the make contact T1 closes again at time t4, at this time, the light receiver PH,'' is in the ON state, so current flows through the relay coil X, and the relay coil X1 is energized. 20 is the upper photoelectric switch PH,
An indicator indicates that the light is in a position that blocks light. At this time, the make contact Zl turns ON, but the break contact Ti
c is OFF.

Next, at time t5, when the make contact T3 closes, the winding core 20
Suppose that leaves the photoelectric switch PH,.

At this time, since the make contact T is OFF, the break contact T'+c is turned ON, and the make contact Z is also turned ON.

is ON, so relay coil X remains energized. At time t, the make contact T is closed, and at this time the winding core 20 is the photoelectric switch PH.

1) 1 to relay coil
)1) t is cut off. This indicates that the winding core 20 has separated from the photoelectric switch PH.

On the other hand, when the make contact T4 closes at time t and the photoelectric switch PH is shielded from light, the light receiver PH4'' turns ONL, thereby exciting the relay coil X4.This causes the winding core 20 to shield the photoelectric switch PH4 from light. At this time, the photoelectric switch P! (light of 4 is sent to the receiver PH
Even if 2” is received, the make contact T2 is not closed, so
Relay coil X2 is not energized, and relay coil X2 is not excited.

In this manner, in the present invention, the make contacts T1 to T4 are sequentially opened and closed, so that even if the light from the photoelectric switch interferes, the relay coil will not malfunction.

FIG. 4 shows another embodiment according to the invention.

In the embodiment shown in FIG. 4, members similar to those in the second embodiment are denoted by the same reference numerals, and detailed explanation thereof will be omitted. In the embodiment shown in Fig. 2, the light irradiation directions of the four sets of photoelectric switches are set in the same direction, but if two sets of the four sets of photoelectric switches are set in opposite directions, there will be two make contacts, T2 and T2. Enough.

〔Effect of the invention〕

As explained above, according to the device for detecting the position of the winding core of a shaft-mounted object such as a coil according to the present invention, a plurality of sets of photoelectric switches for detecting the winding core are sequentially operated one at a time, and this is repeated to detect the winding core. Since the position of the winding core is detected, the position of the winding core can be accurately detected without the light from the photoelectric switch interfering with each other.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the arrangement of photoelectric switches of a device for detecting the center position of shaft-mounted objects such as coils according to the present invention, and Fig. 2 is a circuit diagram showing a sequence circuit for sequentially operating four sets of photoelectric switches. , FIG. 3 is a timing chart showing the operation of the sequence circuit shown in FIG. 2, FIG. 4 is a circuit diagram showing another embodiment of the present invention, and FIG. 5 shows a conventional core position detection device. It is an explanatory diagram. 20... Winding core, PH+,, PHZ, PHZ,
PH4...Photoelectric switch PH,'~P Ha'・
... Emitter, P H+ "~pHa" ... Light receiver.

Claims (1)

[Claims] (1) In a winding core position detection device for a shaft-mounted object such as a coil, which detects the position of the winding core by arranging a plurality of sets of sensors consisting of a light emitter and a light receiver at both ends of the winding core of the shaft-mounted object, such as a coil, a control unit that repeatedly causes the light emitters to emit light while sequentially shifting the light emission timing of the light emitters of the plurality of sets of sensors at regular time intervals; and a determination unit that determines the position of the winding core based on the output results of the light receivers of the plurality of sensor sets. A device for detecting the position of a winding core of a shaft-mounted object such as a coil.