JPH0385406A - Dimension detector - Google Patents

Abstract

PURPOSE:To enable discrete detection of the dimension of a component to be detected, irrespective of a dimensional error of another component to e detected, by a method wherein whether the dimension is in the allowable limits or not is detected/by a pair of sensors from a time difference in detection of connecting parts in the opposite ends of the component to be detected. CONSTITUTION:By driving a screw 27 for fixation tightly after adjustment, a fitting wall 12, a slide plate 18 and a slide body 22 are brought into pressure contact with each other and thereby optical sensors 31 and 32 are positioned. When a wire rod 1 is moved in the direction of an arrow, a sensor 31 detects a connecting part 1A on the rear side of a terminal 1B in the direction of movement and a detection pulse is outputted from this sensor 31. At a position to which the wire rod 1 is moved slightly in the direction of the arrow, subsequently, another connecting part 1A on the front side of the terminal 1B in the direction of movement is detected by the sensor 32 and the detection pulse is outputted from the sensor 32. The wire rod 1 is always moved at a prescribed speed of conveyance, and therefore a discrimination between good and bad articles is made by comparing a difference between the times of generation of the detection pulses of the sensors 31 and 32 with a reference time set beforehand.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is directed to the use of terminals for electronic components, etc., which are formed into a continuous connection state by, for example, cutting notches into a wire material that can be easily cut at regular intervals. , relates to a dimension detector used to detect whether a length dimension is within an allowable range.

<Prior art> Such a dimension detector is used in a terminal manufacturing system in which a wire is processed to form a plurality of terminals into a shape in which they are continuously connected in a state where they can be easily cut and separated, or in which each terminal in such a state is In a terminal attachment system for inserting a terminal into an electronic component or the like, it is used to determine whether each terminal is within an allowable size range. This type of conventional dimension detector generally has a structure as shown in FIGS. 6 to 8. That is, it is composed of a detection lever 2 which is rotatable about a support bin 3 as a fulcrum, and a limit switch 5 in which a roller 7 rotatably attached to the tip of a contact piece 6 is brought into contact with the detection lever 2.

The detection lever 2 is connected to the contact piece 6 of the limit switch 5.
Or, it is always rotationally biased in the direction of the arrow in Fig. 6 by other biasing means, and a large number of terminals IG are
, 1B are formed in a continuous connected state, and the wire rod 1 is
By being transferred in the direction of the arrow shown in the figure, when the detection end 4 of the detection lever 2 faces the notch IA, the detection lever 2 is slightly rotated by the aforementioned biasing means and the detection end 4 enters the notch IA. The rotation of this detection lever 2 turns off the limit switch 5.

Here, IG indicates a good terminal within the allowable size range, and 1B indicates a defective terminal outside the allowable size range.
The wire rod 1 is moved intermittently at a constant feed pitch corresponding to the standard dimension of the wire rod IG. Therefore, when a non-defective terminal IG passes through the detection end 4 in sliding contact and stops, the detection end 4 enters the notch 1A and the limit switch 5 is turned off as shown in FIG. terminal IB of
When it passes and stops, the limit switch 5 is turned off as shown in Fig. 7, and by turning off the limit switch 5, it is detected that the product is defective, and the drive of the system is stopped or the defective product is marked. etc. will be carried out.

<Problems to be Solved by the Invention> By the way, since the permissible size range for determining a good terminal IG is determined, the allowable size range is determined for the processing position in the terminal manufacturing system, and for the terminal feeding claw in the terminal mounting system. It is necessary to install them as close as possible. This is because when moving away from the machining position or the terminal feed claw, the feed pitch of each terminal IG and 1B that exists between them, that is, each difference with respect to the standard dimension, and the feed pinch error due to the feed claw are accumulated, resulting in a large error. As shown in Fig. 8, a malfunction may occur in which the limit switch 5 is turned on even though a good terminal 1G has passed and is stopped.
Detection accuracy decreases significantly.

However, since these terminals IG and 1B are generally very small in shape, the configuration for installing a dimension detector close to the processing position and the terminal feed claw becomes extremely complicated, and the detector is High precision is required to position the detector in the state shown in FIG.

The present invention has been made in view of such conventional problems, and it is possible to determine whether or not the dimensions are within the allowable size range even if the positioning is not required with precision at the processing position or at a location away from the feed jaw. The technical problem is to provide a dimension detector that can detect the size of the object with high precision.

<Means for Solving the Problems> In the present invention, as a technical means for achieving the above-mentioned problems, a dimension detector is configured as follows. That is, a continuous connecting member in which parts to be detected of the same type are continuously connected in a line with a connecting part of a small piece interposed between them is fed at a constant feed pitch corresponding to the standard dimension of the parts to be detected and at a constant rate. In a dimension detector that is installed in a device that moves intermittently at a conveying speed and detects whether the length of each of the detected members being moved in the moving direction is within an allowable dimension range, the continuous connecting member A slide plate equipped with a first sensor for detecting the connection part is provided on the base body having a guide groove through which the connection part is inserted, and is movable in parallel to the moving direction of the continuous connection member. A sensor mount equipped with a second sensor for detecting the sensor is attached so as to be movable in the same direction as the first sensor, and the sensor mount is attached to the slide plate so as to move toward and away from the first sensor. The present invention is characterized in that it is equipped with a fixing means for fixing the slide plate and the sensor mount to the base body, on which an operating body is mounted to adjust the distance between the two sensors by moving in the direction.

<Operation> First, operate the operating body to move the sensor mounting base with respect to the slide plate equipped with the first sensor, and adjust the distance between both sensors to match the standard dimensions of the detected part to be detected. . By moving the slide plate on which both sensors are held at the adjusted interval relative to the base body,
The slide plate and the sensor mount, that is, both sensors are fixed to the base body by the fixing means, with the connecting portion on the front side in the moving direction of the detected component positioned between the two sensors.

Then, when the continuous connecting member is moved within the guide groove at a constant conveyance speed, the connecting portion located between the two sensors is detected by the second sensor. Here, since the spacing between both sensors is set to match the standard dimensions of the detected part, in the case of a good detected part that is within the allowable size range, the second sensor detects the movement of the detected part. At substantially the same time as detecting the front connection in the direction, the first sensor detects the rear connection of the detected component. On the other hand, in the case of a defective detected part that is outside the allowable size range, each sensor detects the corresponding connection part at a time difference. Therefore, since the conveyance speed of the continuous connection member is constant, it is possible to calculate the time difference between the detection of the connection part of both sensors that falls within the allowable size range, and therefore it is possible to calculate whether the time difference between the detection of the two sensors is within the set time or not. By comparison, it is possible to detect whether the detected component is within the allowable dimensions.

This dimension detector detects whether or not the detected part is within the permissible size range based on the time difference between the detection of the connection part at both ends of the detected part by a pair of sensors. The dimensions of only the corresponding detected parts can be individually detected, completely independent of the dimensional errors of the parts. Therefore, the dimensions can be detected with high accuracy even if the device is installed at a location away from the processing position or the conveyor feed claw, and the configuration is not complicated in any way.

Furthermore, in response to differences in the dimensions of the detected parts, it is sufficient to move the second sensor using the operating body and adjust the distance between the two sensors to match the dimensions of the detected parts. Positioning does not require particular precision, as it is sufficient to simply move the slide plate so that the connecting portion on the front side in the moving direction of the detected component is located between both sensors. Therefore, it can be installed in an extremely short time and easily, and can also be quickly applied to parts to be detected that have different dimensions.

<Example> Hereinafter, a preferred example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 and FIG.
The figures are a plan view and a partially cutaway front view, respectively. In these figures, the base body 10 has a base part 1) and a mounting wall 12 that are integrally formed in a cross-sectional shape.
) has a guide groove 13 for inserting the wire 1 to be detected.
are formed, and holding members 14 and 15 are fixed to both ends of the base part 1) with fixing screws, and the wire rod 1
moves smoothly within the guide groove 13 without coming off.

On the other hand, on the front surface of the mounting wall 12, a guide rail portion 16 having a trapezoidal cross section is formed to protrude in parallel to the guide groove 13. A flat slide plate 18 integrally protruding from the front surface of one end of the first sensor mounting base 17 is slidably fitted into the guide rail portion 16 through an engagement groove 19 formed on the back surface thereof. Together, they are movably supported by the guide rail section 16.

A guide rail portion 20 having a trapezoidal cross section is integrally provided from the front surface of the slide plates 1 and 8, and is attached to the second sensor mounting base 2.
A slide body 22 integrally provided with a slide body 22 is slidably fitted into the guide rail section 20 and movably supported by the guide rail section 20.

A bearing stand 23 is fixed to the front surface of the right end of the slide plate 18, and a micro jack 24 is rotatably inserted through the bearing stand 23. The second sensor mount 21 integrated with the slide body 22, which is movable with respect to the slide plate 18, is moved by the micro jack 24 by the biasing force of the compression coil spring 25 interposed between both sensor mounts 17 and 21. It is pressed against the anvil portion 26. Therefore, the second sensor mounting base 21 is moved by operating the micro jack 24, and the distance between the two mounting bases 17, 21 can be adjusted.

Both mounting bases 17 and 21 after this adjustment, and therefore the slide plate 1
8 and the slide body 22, a fixing screw 27 is pushed through the long adjustment hole 28 of the mounting wall 12 and the long adjustment hole 29 of the slide plate 18, respectively, and fixes the slide body 2.
It is screwed into the screw hole 30 of No. 2. This fixing screw 27
By loosening the slide body 22 and the slide plate 18 against the guide rail section 20 and the guide rail section 1, respectively, by loosening the fixing screws 27, the mounting wall 12. The slide plate 18 and the slide body 22 are pressed and fixed to each other.

Optical sensors 31 and 32 are fitted into each of the sensor mounting bases 17.21, respectively, and are fixed by fixing screws 33.34. This first and second optical sensor 3
1 and 32 are reflection detection type devices equipped with a light emitting element and a light receiving element. Detect fA. In addition, each sensor mounting base 17.21 has an optical sensor 31.32 attached to the guide groove 13.
Position against.

Next, the operation of the above embodiment will be explained in detail with reference to FIGS. 4 and 5. This dimension detector is transported intermittently and at a constant speed by the transport mechanism of these systems at the exit of the terminal manufacturing system or the entrance of the terminal mounting system at a constant feed pitch corresponding to the standard dimensions of the terminal. The wire rod 1 is inserted into the guide groove 13 and installed.

First, after loosening the fixing screw 27 to the extent that it does not come out from the screw hole 30, the micro jack 24 is rotated to move the anvil portion 26, and the compression coil spring 25 presses it against the anvil portion 26. The second sensor mounting base 21 , which is attached thereto, moves integrally with the anvil part 26 while sliding on the second guide rail part 20 . Thereby, the distance between the two sensor mounts 17.21 is varied, and the distance X between the respective optical axes of the two optical sensors 31.32 is adjusted to the standard dimension length of the terminal to be detected. This adjustment can be made extremely accurately using the scale of the micro jack 24.

After the position adjustment of the second optical sensor 32 is completed, by sliding the slide plate 18 on the first guide rail section 16, the two optical sensors 32 and 32 are aligned, as shown in FIGS. 1 and 4 (a+), respectively. The optical axes of optical sensors 31 and 32 are connected to wire 1.
Position it on both sides of the notch 1A. This slide board 1
8, the micro jack 24 moves integrally with the first sensor mounting base 17 via the slide plate 18 and the bearing stand 23, and the anvil portion 26 of the micro jack 24 is moved by the compression coil spring 25. Since the two sensor mounting bases 21 are pressed against each other, both optical sensors 31 and 32 are held at the adjusted distance. Moreover, the fixing screw 27 moves within the elongated hole 28 of the mounting wall 12 and the elongated hole 29 of the slide plate 18 without any trouble. Then, by tightening the fixing screw 27 after the above-described adjustment, the mounting wall 12.degree. slide plate 18 and slide body 22 are brought into pressure contact with each other, and each optical sensor 31, 32 is positioned. In the same figure, a defective terminal I whose length is shorter than the allowable length is shown.
The case where B is detected is shown as an example.

When the wire 1 is moved in the direction of the arrow from the state shown in FIG. 4(a), first the first optical sensor 3 is moved as shown in FIG. 4(b).
1 detects the notch IA on the rear side in the moving direction of the corresponding terminal 1B, and the first optical sensor 31 outputs a detection pulse as shown in FIG. 5(a). If it is a good terminal 1G with a standard dimension and length, both optical sensors 31 and 32 arranged at an interval of this standard dimension and length will detect the notch IA before and after the corresponding terminal IG at almost the same time. However, since a defective terminal IB whose length is shorter than the allowable dimension is located between both optical sensors 31 and 32, the wire rod 1 has moved slightly in the direction of the arrow from the position bl in the same figure. At the position shown in FIG. 5(C), the second optical sensor 32 detects the notch 1A on the front side in the moving direction of the corresponding terminal IB, and the first optical sensor 32 outputs a detection pulse as shown in FIG. 5(b). After that, the wire is fed by a predetermined feeding pitch and stops at the position dl in the figure.

Since the wire 1 is always moved at a constant conveyance speed, a comparison is made to see if the generation time difference Y between the detection pulses of both optical sensors 31 and 32 shown in FIG. 5 is within a preset reference time. Good products and defective products are then determined. Here, if the conveyance speed differs, the reference time for quality determination also differs, but the reference time can be easily calculated and set from the conveyance speed. Alternatively, the reference time may be calculated and stored in advance for each transport speed, and the reference time may be selected and set each time.

<Effects of the Invention> As described above, according to the dimension detector of the present invention, it is possible to determine whether or not the dimension is within the allowable dimension range based on the time difference between the detection of the connection portion at both ends of the detected part by the pair of sensors. Since the detection is configured, the dimensions of only the relevant detected part can be individually detected, completely unrelated to the dimensional errors of other detected parts. Therefore, dimensions can be detected with high precision even if the device is installed at a location away from the machining position, conveyance feed claw, etc., and the configuration is not complicated in any way.

Furthermore, in response to differences in the dimensions of the detected parts, it is sufficient to move the second sensor using the operating body and adjust the distance between the two sensors to match the dimensions of the detected parts. Positioning does not require particular precision, as it is sufficient to simply move the slide plate so that the connecting portion on the front side in the moving direction of the detected component is located between both sensors. Therefore, it can be installed in an extremely short time and easily, and can also be quickly applied to parts to be detected that have different dimensions.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a partially broken front view thereof, Fig. 4 is an explanatory diagram of dimension detection, Fig. 5 The figure is a waveform diagram of both sensors in FIG. 4, and FIGS. 6 to 8 are schematic front views of a conventional dimension detector. 1--Wire rod (continuous connection member) A--Notch (connection part) 0--Base body 3--Guide groove 8--Slide plate 1--Sensor mounting base 4-Micro jack (operation) body) 7-Fixing screw (fixing means)

Claims (1)

[Claims] (1) A continuous connecting member in which parts to be detected of the same type are connected continuously in a line with a connecting part of a small piece interposed between them, at a constant feeding pitch corresponding to the standard dimension of the part to be detected, and at a constant rate. In the dimension detector, which is installed in a device that moves intermittently at a conveying speed of A slide plate equipped with a first sensor for detecting the connecting portion is provided on the base substrate having a guide groove through which the member is inserted, so as to be movable in parallel to the moving direction of the continuous connecting member, and the slide plate has a guide groove for inserting the member. A sensor mount equipped with a second sensor for detecting a connection part is attached so as to be movable in the same direction as the first sensor, and the sensor mount is connected to the slide plate with respect to the first sensor. A dimension detector, characterized in that it is equipped with a fixing means for fixing the slide plate and the sensor mount to the base substrate, on which is attached an operating body that adjusts the distance between the two sensors by moving them in a direction away from each other.