JP3379306B2 - Crimped terminal crimp measuring device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring a crimped portion of a crimp terminal, and more particularly, to a height of a terminal crimped portion of a terminal fitting crimped to a terminal portion of an electric wire. The present invention relates to a crimping terminal measuring device for crimping terminals for accurately measuring crimping. 2. Description of the Related Art The crimp height of a terminal fitting crimped to the terminal of an electric wire is a factor that has an important effect on the electrical and mechanical characteristics of the terminal fitting and the electric wire.
It is inspected whether or not the crimped dimensions of the crimped terminal fittings are finished to prescribed dimensions. Referring to FIG. 4 which is a schematic perspective view for explaining a caulking portion of a general terminal fitting which is symmetrical in the present invention, a cross section of a caulking portion TC of a terminal fitting T at which a crimp height is measured is shown. Are formed symmetrically with respect to a vertical line L passing through the center.
1, T2 has occurred. Then, the crimped terminal fitting T
When the crimp height is managed, the dimensions after crimping are the horizontal width W and the vertical height (hereinafter, “crimp height”).
It is necessary to manage whether H and the protrusion amount P of the pressure burrs T1 and T2 are set within allowable values. Of these, the width W in the horizontal direction is the terminal fitting T
Regulated by the crimper of the die set to crimp the
Since the dimensions are specified almost precisely, the dimensions managed in the factory at the time of manufacturing are the management of the crimp height H and the protrusion amount P.
As a method of measuring the crimp height H, conventionally,
A micrometer was employed. However, the terminal fitting T
Since the bottom surface T3 has an arc as is apparent from the above cross section, there is a problem that the needle (spindle) of the micrometer is difficult to be set at the center of the terminal fitting T, and the crimping burrs T1, T2 are formed in the micrometer. Because of the problem of interference, measurement errors are likely to occur. Therefore, in order to eliminate the measurement error as described above, a positioning tool for positioning the terminal fitting has been proposed (see Japanese Patent Application Laid-Open No. 2-257001). In that configuration, a fixed clamp for positioning one side of the terminal fitting T and a movable clamp for positioning the other side of the terminal fitting in cooperation with the fixed clamp are provided. The terminal fitting is sandwiched and positioned on the lower fixed base. [0006] In the above-described conventional positioning tool, the terminal fitting T is sandwiched from the side of the terminal fitting T, and one of the positioning tools is a fixed clamp. As a result, it is necessary to set a fixed clamp in accordance with the type of the terminal fitting T, so that versatility cannot be provided. For this reason, there is a problem that the inspection efficiency is deteriorated when performing high-mix low-volume production. On the other hand, with the above-mentioned positioning tool, the protrusion amount P of the press-fit burrs T1 and T2 shown in FIG. 4 cannot be managed.
For this reason, regarding the management of the protrusion amount P of the crimp burrs T1 and T2, the difference between the crimp burrs T1 and T2 is determined by visually observing the crimp height H or measuring the crimp height H. , Crimping burrs T1 and T2 are caulked at the lower end of TC
It was inspected whether or not it protruded below the bottom surface T3. That is, the height of the bottom surface T3 of the caulked portion TC is defined as the limit line H1, and it has been inspected that the lower ends of the crimping burrs T1, T2 do not protrude below the limit line H1. However, in the former case, the quality is not constant, and in the latter case, it is necessary to perform the measurement process twice, which is troublesome and, as a result, a bottleneck in increasing the efficiency of high-mix low-volume production. Had become. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and in measuring and inspecting terminal fittings, there is provided an apparatus for measuring a crimping portion of a crimping terminal which can efficiently perform inspection even when a large variety of small-quantity production is performed. It is intended to provide. Means for Solving the Problems [0012] The configuration according to claim 1 is characterized in that:
Crimp burrs are formed on both sides of the bottom of the caulked part due to crimping
An apparatus for measuring the crimping portion of the terminal fitting, and receiving Keru receiving stand the bottom surface of the crimping portion of the pin fitting, distribution just above the pressure-receiving table
Placed on the pressure stand by descending
Contact the caulked part and measure the crimp height of the caulked part
And measuring element for opening downwardly toward said pressure receiving board, and a vertical line passing through the central portion of the pressure receiving board with defining the positioning surface of the V-shaped formed symmetrically to the axis, the measurement
Descends in conjunction with the child's descent, and
Contact with the caulked portion which is received in圧台, the positioning member bottom center of the caulking portion is positioned to be received in the pressure receiving board, are arranged on both sides of the pressure-receiving table, it can be displaced vertically
And is urged upward by elastic force.
Is protruding above the pressure receiving table and can be received by the pressure receiving table.
Contact with crimping burrs protruding on both sides of the bottom of the caulking part
A pair of abutting members and the positioning member
Along with this, the pair of contact
Detects the displacement of the contacting member, and if any of the contacting members
And a means for outputting a crimping burr defect when the following conditions are satisfied. In this configuration, the positioning surface of the positioning member positions the caulking portion of the terminal fitting on the pressure receiving table before the crimp height is measured. At that time, since the positioning surface is formed symmetrically with respect to a vertical line passing through the central portion of the pressure receiving table, the center of the caulked portion is shifted on the vertical line regardless of the width of the caulked portion, Positioned. Then, in this state, the pair of contact members are changed downward.
The position is detected, the protrusion amount of the press-fitting burr is specified, and it is determined whether or not the press-fitting burr is defective . Hereinafter, with reference to the accompanying drawings,
A preferred embodiment of the present invention will be described in detail. FIG.
1 is a schematic front view showing a schematic configuration of a crimp terminal measuring device for crimp terminals according to one embodiment of the present invention, and FIG. 2 is an exploded view of a positioning member employed in the crimp terminal measuring device of FIG. It is a perspective view. FIG. 3 shows the operation of the positioning member employed in the crimping terminal measuring device of the crimp terminal shown in FIG. 1. FIG. 3A is an enlarged front view showing a case of measuring a terminal fitting having a maximum width. B) is an enlarged front view showing a case where a terminal fitting having a minimum width is measured. Referring to FIG. 1, an apparatus for measuring a crimping portion of a crimp terminal illustrated in FIG.
A pressure receiving table 12 attached to the pressure receiving table 12, an instrument 14 for measuring the crimp height H of the crimping portion TC of the terminal fitting T mounted on the pressure receiving table 12, a positioning member 15 for positioning the crimping portion TC on the pressure receiving table 12. And a determining means 20 for inspecting the pressure burrs T1 and T2 as main components. The frame 11 is a metal member, and has a bottom plate 11A and a top plate 11B provided in parallel with each other.
Are integrally formed in a frame shape by a pair of side plate portions 11C and 11D. The pressure receiving table 12 is a metal member fixed to the upper surface of the bottom plate 11A of the frame 11 by welding or the like, and the upper end surface thereof is a caulked portion T of the terminal fitting T to be inspected.
A pressure receiving surface 12A that receives the bottom surface of C is defined. The width W1 of the pressure receiving surface 12A is 1.2 mm in the illustrated example.
Is set, so that the width W of the caulked portion TC is set.
Can be adapted to a terminal fitting T of 1.6 mm to 5 mm. Next, the meter 14 is embodied by a so-called dial gauge, and has a measuring element 14A disposed directly above the pressure receiving table 12 and a measuring element 14A extending vertically to be displaced vertically. Possible spindle 14B and clamp 1 for clamping spindle 14B to the retracted position shown
4C and a handle 14 for operating the clamp 14C
D, a display panel 14F for displaying the amount of displacement of the spindle 14B, and a hand 14G indicating the scale of the display panel 14F in conjunction with the spindle 14B. Although not specifically shown, the spindle 14
B is provided with a rack gear, and the needle 14G is interlocked via a gear mechanism that meshes with the rack gear. The spindle 14B is fixed to a fixed portion (for example, the frame 11) via a spring member (not shown).
And when the clamp 14C is released, it descends slowly. In the above configuration, in the specific example of FIG. 1, the positioning member 15 is provided at the lower end of the spindle 14B.
Is attached. The positioning member 15 is a rectangular member having a V-shaped positioning surface 15 </ b> A that opens downward on the lower surface thereof. The positioning surface 15 </ b> A is formed symmetrically with respect to the center line LV in the vertical direction of the pressure receiving table 12, and opens toward the pressure receiving surface 12 </ b> A of the pressure receiving table 12. Thus, even when the width W of the caulked portion TC is different, the terminal fitting T placed on the pressure receiving surface 12A is in a state where the center O of the caulked portion TC is brought closer to the center line LV at the front. Is positioned. Positioning surface 15
The angle θ formed by A is the above-described width W (from 1.6 mm to 5 m).
When positioning the terminal fitting T of m), it is set to 60 °. Referring to FIG. 2, a positioning member 15 illustrated in FIG. 2 includes a first plate 151 and a second plate 152.
And are connected by bolts 153 to be integrated. On the first plate 151, a pair of rectangular bulges 151A are formed integrally with each other at right and left intervals. The pair of bulging portions 151A, 151A are formed with a pair of vertically arranged insertion holes 15E, and the second plate 152 is provided with screw holes 15F opposed to the respective insertion holes 15E. Have been. By screwing the bolt 153 into the screw hole 15F, the two plate pieces 151 and 152 can be integrally connected.
A rectangular guide groove 15B through which the spindle 14B is inserted is defined between the bulges 151A. Further, the first plate 151 is continuous with the lower surface 15D of each of the bulging portions 151A, 151A at a right angle,
A thin plate portion 15C that partitions the positioning surface 15A together with the second plate piece 152 is provided. The vertical displacement of the tracing stylus 14A and the spindle 14B guided by the guide groove 15B is allowed by the space defined between the thin plate portion 15C and the second plate piece 152. Also,
When the lower surface 15D of each of the bulging portions 151A, 151A is seated on the upper edge of the tracing stylus 14A, the positioning member 1 is formed.
5 is hanging on the spindle 14B of the instrument 14. As shown in FIG. 1, a compression coil spring SP compressed between the positioning member 15 and the top plate 11B of the frame 11 urges the compression coil spring SP downward. Further, in a state where the shoulder portion 15D is seated on the upper edge, the positioning surface 15A is located at a predetermined distance h between the lower surface of the tracing stylus 14A and the bottom of the positioning surface 15A. It is set as follows. As a result, when the clamp 14C of the instrument 14 releases the spindle 14B and the spindle 14B descends, the positioning member 15 is integrally lowered by the urging force of the compression coil spring SP, while the caulking portion TC is not moved. , Prior to the tracing stylus 14A, abut against the caulking portion TC, and as described above, the caulking portion T
The center O of C is positioned on the center line LV of the pressure receiving table 12. Next, the discriminating means 20 includes a pair of contact members 21 and 22 for detecting pressure burrs T 1 and T 2 of the caulking portion TC mounted on the pressure receiving table 12, and a contact between the contact members 21 and 22. Proximity sensors 23 and 24 for detecting whether or not the contact surfaces 21A and 22A are lower than the limit line H1;
And a lamp 25 for indicating the failure of the crimping burrs T1 and T2. The contact members 21 and 22 are disposed on both sides of the pressure receiving table 12, respectively,
1 and T2 to specify the amount of protrusion of each of the pressure-bonded burrs T1 and T2. A pair of guide members 26 and 27 are provided on both sides of the pressure receiving table 12 to guide the contact members 21 and 22 to be vertically displaceable, and are fixed to the upper surface of the bottom plate 11A of the frame 11. ing. Compression coil springs 28 and 29 are respectively disposed between the respective contact members 21 and 22 and the bottom plate portion 11A, whereby the respective contact members 21 and 22 are constantly urged upward. . The urging force of each of the compression coil springs 28, 29 is set such that the corresponding contact members 21, 22 can be sufficiently urged upward. On the other hand, positioning member 1
The urging force of the compression coil spring SP for urging the positioning member 1 is opposed to the urging forces of the two coil springs 28 and 29.
5, the crimping portion TC of the terminal fitting T is set to be fixed to the pressure receiving surface 12 </ b> A of the pressure receiving table 12. At the upper ends of the contact members 21 and 22, contact surfaces 21A and 22A are defined.
The protrusion of the crimping burrs T1, T2 can be specified by the contact of the crimping burs T1 and T2 with the corresponding crimping burrs T1, T2 of the caulking portion TC. The proximity switch 23,
A pair 24 is provided for each of the contact members 21 and 22, and detects when the lower surfaces of the corresponding contact members 21 and 22 reach a predetermined height and outputs a signal. It is configured as follows. In the example of FIG. 1, when any of the contact members 21A (21B) is displaced below the height (limit line) H1 of the pressure receiving surface 12A of the pressure receiving table 12, the proximity switches 23 and 24 are connected. It has become. These proximity switches 23 and 24 can be configured by limit switches. However, when the displacement amounts of the contact members 21A and 21B are also converted into data using the photoelectric element, there is an advantage that the wear of the die set for crimping the terminal fitting T can be statistically determined. . The lamp 25 includes two proximity switches 23,
24, one of the proximity switches 23
It is connected to each of the proximity switches 23 and 24 by a circuit configuration that lights up when (24) is connected. Alternatively, a lamp may be provided for each of the proximity switches 23 and 24 so that it is possible to display which switch 23 or 24 is connected (detection of a defect). further,
A buzzer may be employed instead of or in combination with the lamp 25. In the above configuration, first, the terminal fitting T crimped to the electric wire is transferred onto the pressure receiving surface 12A of the pressure receiving table 12 by the operator or the device, and the handle 14D of the gauge 14 is operated to operate the clamp 14C. When the spindle 14B is released and lowered from the retracted position shown in FIG. 1, the positioning member 15 seated on the tracing stylus 14A also moves down integrally by the action of the compression coil spring SP. Then, first, the positioning member 15 is brought into contact with the caulking portion TC of the terminal fitting T, and the caulking portion TC is positioned so that the center O thereof is overlapped on the center line LV of the pressure receiving table 12, and is fixed to the pressure receiving surface 12A. Next, when the tracing stylus 14A comes into contact with the caulking portion TC, the height H of the caulking portion TC is increased.
It is indicated by F and the needle 14G. As described above, in the above-described configuration, the center O of the caulked portion TC is brought closer to the vertical center line LV regardless of the width W of the caulked portion TC by the positioning surface 15A of the positioning member 15, Figure 3
The same positioning member 15 is used for caulking when the width W of the caulked portion TC is large as shown in FIG. 3A or when the width W of the caulked portion TC is large as shown in FIG. There is an advantage that the portion TC can be positioned and the crimp height H can be measured. Next, when the caulked portion TC is placed on the pressure receiving surface 12A, the contact members 21, 22 disposed on both sides of the pressure receiving table 12 are moved upward by the urging forces of the compression coil springs 28, 29. Is pressed to the corresponding crimping burr T
1, it is in contact with T2. In this state, when the positioning member 15 presses the caulked portion TC against the pressure receiving surface 12A as described above, the contact member 2 is displaced downward by the amount of the caulked portion TC displaced downward.
1, 22 are also displaced downward. If any one of the contact surfaces 21A and 22A of the contact members 21 and 22 is displaced below the limit line H1 by this displacement, the proximity switch 23 (24) corresponding thereto is connected. , The lamp 25 is turned on to indicate a crimping burr defect. As described above, in the specific example shown in the drawing, it is possible to determine whether or not the protrusion amounts of the crimp burrs T1, T2 specified at the time of the measurement of the crimp height H fall within the regular limit line H1. Therefore, there is an advantage that the crimp height H and the pressure burrs T1 and T2 can be simultaneously managed by one measurement. In addition, the positioning member 15
Is performed in conjunction with the tracing stylus 14A of the instrument 14, there is no need to provide a mechanism for driving the positioning member 15, and there is an advantage that the configuration is simplified. Therefore, according to the above configuration, the terminal fitting T
Has a remarkable effect that the inspection can be performed efficiently even when a large variety of small-quantity production is performed. Note that the above-described embodiments are merely preferred specific examples of the present invention. For example, it is also possible to configure a configuration in which the positioning member is omitted and only the determination unit is provided, or a configuration in which the determination unit is omitted and the positioning member is omitted. In particular, in the latter case, by using an asymmetric positioning member together, it becomes possible to measure a terminal fitting having a so-called overlap structure (for example, one disclosed in Japanese Patent Application Laid-Open No. 7-073950). It goes without saying that various modifications are possible within the scope of the claims of the present invention. As described above, according to the first aspect of the present invention,
In the configuration described, by the positioning surface of the positioning member,
Since the center of the caulked portion is shifted and positioned on the vertical line regardless of the width of the caulked portion, the caulking portions of a plurality of types of terminal fittings are positioned using the same positioning member, and the crimp height is measured. There is an advantage that can be. Further, the projection amount of the identified crimped burrs when measuring the click Rinpuhaito is, it is possible to determine whether the fall normal limit line, the crimp height and crimp burrs one measurement There is an advantage that management can be performed simultaneously . [0034] I slave, according to the present invention, when the terminal fitting measuring test, a marked effect of performing the efficient inspection even when performing diversified production as possible Te.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view showing a schematic configuration of an apparatus for measuring a crimped portion of a crimp terminal according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of a positioning member employed in the caulking portion measuring device of the crimp terminal of FIG. 3A and 3B show the operation of a positioning member employed in the crimping terminal measuring device of the crimp terminal of FIG. 1, wherein FIG. 3A is an enlarged front view showing a case of measuring a terminal fitting having a maximum width, and FIG.
FIG. 4 is an enlarged front view showing a case where a terminal fitting having a minimum width is measured. FIG. 4 is a schematic perspective view for explaining a caulked portion of a general terminal fitting which is symmetrical in the present invention. [Description of Signs] 12 Pressure receiving table 14 Instrument 15 Positioning member 15A Positioning surface 20 Discriminating means LV Center line (vertical line) T Terminal fitting (crimp terminal) TC Caulking portion O Center of crimp terminal H Crimp height H1 Limit line

Claims (1)

(57) [Claims] [Claim 1] Crimp burrs on both sides of the bottom surface of the caulked portion by crimping
Is a device that measures the swaged part of the terminal
Te, a receiving Keru receiving stand the bottom surface of the crimping portion of the pin fitting is disposed directly above the pressure-receiving table, by lowering pressure receiving table
A measuring element for measuring the crimp height of the caulked portion which is in contact with the caulked portion received by the caulking portion , and opened downward toward the pressure receiving table, and symmetrically with respect to a vertical line passing through a central portion of the pressure receiving table. thereby defining a positioning surface of the formed V-shaped, in conjunction with the drop in the measuring element
And descended, and received by the pressure receiving table before the probe
In contact with the caulking portion, the bottom center of the caulking portion is received in the pressure-receiving table
And a positioning member for positioning the pressure receiving table so that it can be displaced up and down.
Is urged upward by elastic force, and its upper surface is
Does it protrude above the pressure table and can be received by the pressure receiving table
Abuts the crimping burrs that protrude on both sides of the bottom surface of the tightening part
With the positioning of the pair of contact members and the positioning member, the pressing
To detect the displacement of the pair of contact members displaced downward,
Crimping when any contact member goes below the specified position
And a means for outputting a burr defect .