JPH0454998Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to an improvement of an interlayer paper break detector for a chain-like component winding device.

``Conventional technology'' Parts such as contacts used in connectors and contact pieces used in switches are manufactured by punching thin strips of spring material one after another using a press, and many of these parts are connected in a chain. It shows a certain condition.
A chained component winding device shown in FIG. 6 is used to stack the chained components 1 and interlayer paper 2 and wind them onto a component reel 3. The interlayer paper 2 is transferred from the interlayer paper reel 4 to the roller 5a, the paper breakage detector 6, and the roller 5.
The parts are sequentially supplied to the parts reel 3 via b. The parts reel 3 is rotated clockwise by the motor 7, and the chained parts 1 and the interlayer paper 2 are stacked and wound up, and due to friction with the interlayer paper 2, the roller 5
a, 5b are rotated, and the interlayer paper reel 4 is rotated by being pulled by the interlayer paper 2. The paper break detector 6 is comprised of paper receivers 6a and 6b provided to slide on one surface of the interlayer paper 2, and a microswitch 6c provided close to the other surface. The micro switch 6c is equipped with a lever extending from the switch main body, and a roller is attached to the tip of the lever.The roller is pressed against the interlayer paper 2 and rotates by sliding, and the lever is pushed, and the micro switch is activated. 6c is turned on. If the interlayer paper 2 breaks before reaching the paper break detector 6, the paper break detector 6
When the interlayer paper 2 runs out, the micro switch 6c
is restored and turned off, and an interlayer paper break is detected. A detection signal from the paper break detector 6 is given to the control section 8, and the control section 8 controls the alarm section 9 to display a visible and audible alarm. Further, the motor 7 is stopped if necessary, and a paper breakage detection signal is sent to the chained parts manufacturing apparatus (for example, a press apparatus). After the interlayer paper 2 is spliced together by the administrator, each device is turned on again.

"Problems with the Prior Art" If the interlayer paper 2 breaks between the roller 5b and the component reel 3 when the conventional device is winding up chained parts, the interlayer paper 2 The paper stops while being caught in the paper break detector 6, and no paper break is detected. Therefore, even if you try to assemble products such as connectors or switches by supplying chained parts to an automatic assembly machine from a part reel wound up without overlapping the interlayer paper, the chained parts will become entangled with each other between the layers. There is a risk that the reel will become unusable because it will not unwind smoothly or it will damage each other.

The purpose of this invention is to eliminate the conventional drawbacks and to improve the reliability of detecting interlayer paper breakage.

"Means for Solving the Problem" According to this invention, a pulse generating means is driven by the rotation of an interlayer paper reel or an interlayer paper roller provided in a running system of the interlayer paper, and a pulse is generated by the pulse generation means. detecting that the occurrence has been stopped,
An interlayer paper breakage detector is provided with a logic circuit that determines and outputs an output indicating that the interlayer paper is broken, so that even if the interlayer paper breaks at any point in the running system, this is reliably detected.

Embodiment As shown in FIG. 1, a notched disk 11 that rotates with the rotation of the interlayer paper reel 4 is provided coaxially with the rotation axis of the interlayer paper reel 4. A notch 11a as shown in FIG. 2 is formed on the periphery of the notched disk 11. As shown in FIG. By monitoring the rotational state of this notch 11a, the rotational state of the interlayer paper reel 4 can be known. Therefore, a notch detection sensor 12 is provided close to the notch disk 11, which detects this and generates a pulse each time the notch 11a is rotated once.

For example, as shown in FIG. 3, the notch detection sensor 12 irradiates light from a light emitting diode 12a onto the periphery of the notch disk 11 from one side, and arranges a phototransistor 12b at an opposing position on the other side. hand,
Detect that light. A notch detection pulse S ₁₁ from the notch detection sensor 12 is applied to a logic circuit 13 . 1st
In the figure, parts corresponding to those in FIG. 6 are denoted by the same reference numerals, and redundant explanation will be omitted.

The component reel 3 is rotated clockwise by the rotation of the motor 7, and the interlayer paper reel 4, pulled by the interlayer paper 2, is rotated counterclockwise. As shown in FIG. 4, in the logic circuit 13, a component reel signal _S3 indicating that the component reel 3 is rotating is applied from the control section 8 to one input terminal of the AND gate 13a and the inverter 13b ( Figure 5A). A clock pulse is applied from the clock generator 13c to the other input terminal of the AND gate 13a, and the clock pulse is output from the AND gate 13a while the component reel signal _S3 is on.
d (Figure 5B). Inverter 13b
The component reel signal ₃ inverted at is applied to the reset terminal of the flip-flop circuit 13e. A notch detection pulse _S11 is applied from the notch detection sensor 12 to the differentiating circuit 13f (FIG. 5C), and the differential pulse _S'11 at the leading or trailing edge of the input is output to the reset terminal of the counter 13d via the OR gate 13g. (Fig. 5D). Incidentally, the output of the inverter 13b (component reel signal ₃ ) is also supplied to the reset terminal of the counter 13d via the OR gate 13g.

The counter 13d counts the clock pulses inputted after the component reel signal _S3 rises, and supplies the counted value to one input terminal of the comparator 13h. _Each period t ₀ , t ₁ , t ₂ ..., t _o ,
In other words, a reference value N _r that is larger than the number of clock pulses N ₀ to _{N o} in the rotation period of the notched disk 11 (interlaminar paper reel 4) is determined in advance, and
3i, and the set value N _r is applied to the other input terminal of the comparator 13h. Comparator 1
3h compares the increasing clock pulse count value N _i with the set value N _r during the t _i (i=0 to n) period, and when N _i >N _r , a high level signal is output and the flip-flop is switched on. Set the circuit 13e. If there is no interlayer paper breakage and the operation is normal, N _i <N _r and the flip-flop circuit 13
e is never set, so the same circuit 13
The output of e remains at a low level.

However, if a break in the interlayer paper occurs at any point between pulses p' ₂ and p' ₃ in FIG. (The interlayer paper reel 4 is appropriately braked so that it does not rotate due to _inertia .) Therefore _, as shown in FIG. After outputting from circuit 13f, there is no subsequent pulse, and counter 1
3d is not reset, its count value _N2 gradually increases and exceeds the set value _Nr . At that time point t _a , the signal at a higher level than the comparator 13h
S _c is output, the flip-flop circuit 13e is set, and a high level paper break detection signal S _Q is output, which continues until the component reel 3 stops. In this way, since the notch detection pulse p _i is output and the next notch detection pulse P _{i +1} is not output while counting N _r +1 clock pulses, that is, the notch detection pulse has stopped, it is determined that the interlayer paper has run out. Ru. Note that in the above description, the differentiating circuit 13f may be omitted. The interlayer paper break detection signal S _Q is sent to the control unit 8.
The control unit 8 turns off the motor 7 to stop the parts reel 3 as necessary, and causes the alarm unit 9 to display an alarm.

In the explanation so far, the notched disk 11 is connected to the interlayer paper reel 4, but this invention is not limited to this case. It will be obvious that the interlayer paper roller 5 may be coaxially rotated with the rotation axis of the interlayer paper roller 5.

This example includes a notch disk 11 and a notch detection sensor 12.
However, the pulse generating means is not limited to this configuration, and other methods may also be used.

``Effect of the invention'' According to this invention, even if a paper break occurs at any point in the running system of the interlayer paper, it is reliably detected, and unlike conventional methods, the chain-like parts can be separated from the middle without interlayer paper. There is no fear that the component reel will become unusable due to being wound up.

[Brief explanation of the drawing]

Fig. 1 is a block system diagram showing an example of a device for winding up chained parts using the interlaminar paper breakage detector of this invention, Fig. 2 is a front view of the notched disk 11 of Fig. 1, and Fig. Fig. 1 is a principle diagram showing the structure of the notch detection sensor 12, Fig. 4 is a block system diagram showing an example of the logic circuit 13 of Fig. 1, Fig. 5 is its timing chart, and Fig. 6 is a conventional interlayer paper cut detection. FIG. 2 is a block system diagram of a chain-like part winding device using a winder.

Claims (1)

[Scope of Claim for Utility Model Registration] A motor, a parts reel that is rotationally driven by the motor and winds up a chained part and interlayer paper in a layered manner, and the above-mentioned interlayer paper supplied to the parts reel is wound in advance. When the interlayer paper is pulled by the rotation of the component reel, it is pressed and slid against the interlayer paper reel rotating in the unwinding direction and the interlayer paper running between the interlayer paper reel and the component reel. An interlayer paper break detector for a chain-like component winding device comprising a rotating interlayer paper roller, the pulse generating means generating one pulse every time the interlayer paper reel or the interlayer paper roller rotates once; Count the number of clock pulses N ₀ , N _{1 ,} N _{2 . .} . at pulse intervals t ₀ , t 1 , _{t 2} .
N ₀ , N ₁ , N ₂ ...) and N _i (i=0,1,
2...)>N _r and a logic circuit that outputs a determination that the interlayer paper has run out.