JPH07312813A - Compression-bonding metal mold structure - Google Patents

Abstract

PURPOSE:To detect whether a waterproof stopper is in a prescribed mounted state or not and to prevent a defective product from flowing out to a process on the downstream side by a method wherein the displacement of a contact part coming into elastic contact with the waterproof stopper is detected. CONSTITUTION:In the case of an electric wire W on and to which a rubber stopper 1A has been mounted and bonded, a lower-end flange part 18b for a contact member 18 in a rubber-stopper mounting-state detection mechanism 15 comes into contact with a swollen part 5 for the rubber stopper before an upper-mold unit UU is lowered integrally so as to reach a lowermost position, and the flange part is then moved upward while the contact member is being a coil spring 19. Then, in a state that a crimper 13 has reached a lowermost position, the upper-end part 18d of the contact member is brought close to a proximity switch 20, an ON-signal is output, and a control part 30 turns on a blue lamp 31 indicating a good product. On the other hand, when a rubber stopper does not exist, the upper-mold unit is lowered integrally. As a result, the control part 30 cannot obtain a signal from the proximity switch 20, it judges the rubber stopper to be not mounted, and it turns on a red lamp 32 indicating a defective product. As a result, it is possible to prevent the defective product from flowing out to a process on the downstream side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crimping die structure for crimping a crimp terminal to an end portion of a wire and a waterproof plug together with a waterproof plug having a wire insertion hole fitted to an end portion of the wire. .

[0002]

2. Description of the Related Art Generally, a waterproof connector terminal is shown in FIG.
The rubber plugs 1A and 1B shown in FIG. 3 and FIG. 14 are used in the state shown in FIG. That is, the rubber stoppers 1A, 1B
Has a base portion 6 in the front half portion, a bulging portion 5 in the rear half portion, and a central hole 4 penetrating these portions.
The waterproof connector terminal is manufactured by fitting A and 1B to the electric wire 2 and crimping the terminal 3 to the base 6, and then mounting the waterproof connector terminal in a terminal accommodating chamber of the waterproof connector. . In the mounted state, the bulging portion 5 is pressed against the peripheral wall of the terminal accommodating chamber, whereby waterproofing is achieved.

In recent years, a manufacturing apparatus for automating the manufacture of the above waterproof connector terminal has been tried. In general, the steps of this manufacturing apparatus include a length cutting step of cutting the covered electric wire W to a predetermined length [see FIG. 16 (a)], and a rubber plug 1A at the end Wa of the cut electric wire W. A rubber plug insertion step of fitting with the insertion tool G [see FIGS. 16 (b) and 16 (c)],
A stripping step of stripping off the coating of the end portion Wa of the electric wire W with a stripping blade C [see FIGS. 16D and 16E], and an electric wire stripped by the fixed lower mold LD and the movable upper mold UD. A terminal crimping step of crimping the crimp terminal T together with the rubber plug 1A to the end Wa of the W [see FIGS. 16 (f) and 16 (g)] is included.

Conventionally, in the above-mentioned rubber plug insertion step, whether or not the rubber plug is attached is detected by an optical system in which a sensor surface of an optical sensor is directly opposed to an electric wire as shown in JP-A-5-268712. It was detected by the device. Then, when the rubber plug is not attached, this is regarded as a defective product and discharged out of the process.

[0005]

However, the method of arranging the optical detection device in the rubber plug insertion step as described above has the following problems. That is, in the downstream of the above rubber plug insertion step, the rubber plug may be displaced with respect to the electric wire or may be dropped from the electric wire. In this case, the rubber plug may be misaligned or dropped. The electric wire that was transported to the terminal crimping process and had no rubber stopper attached, or the electric wire with the rubber stopper displaced, had flowed out to the process downstream of the terminal crimping process.

In particular, the rubber plug tends to be displaced with respect to the electric wire for the following reasons, which further promotes the occurrence of the above-mentioned problems. That is, a) In order to reduce the cost by sharing, one type of rubber plug is usually adapted to a plurality of types of electric wires of different thickness sizes. The connection may be relatively loose, and b) the rubber plug is coated with lubricating oil such as silicone oil to facilitate insertion into the connector. On the other hand, the rubber stopper is slippery, and as a result, the rubber stopper is apt to be displaced with respect to the electric wire.

As described above, the lubricating oil is applied to the rubber plug, and the lubricating oil tends to scatter when the rubber plug is moved along with the end portion of the electric wire. In the above optical detection device, since the sensor surface directly faces the electric wire, it is likely to be contaminated with the lubricating oil, which may result in early detection failure. Even when the detection failure occurs in this way, there is a problem that a rubber stopper is not properly mounted or a rubber stopper is not attached to the downstream process.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a crimping die structure capable of preventing defective products from flowing out to a downstream process.

[0009]

In order to achieve the above object, a crimping die structure according to a first aspect of the present invention has a fixed die on which crimp terminals are set, a crimping position adjacent to the fixed die, and a crimping position. The crimping terminal set in the fixed mold is moved to the separating position farther from the fixed mold and moved to the crimping position so that the end portion of the electric wire set in the predetermined position. Also, in a crimping die structure including a movable mold for crimping collectively to an elastic waterproof plug fitted therein, the waterproof plug is put in a predetermined mounted state at an end of the electric wire set in the predetermined position. There is further provided a waterproof plug mounting state detecting means for detecting whether or not there is, and the rubber plug mounting state detecting means is provided so as to be relatively movable with respect to the movable mold along a moving direction of the movable mold and elastic with the waterproof plug. Abutting part And it is characterized in that it comprises a displacement detection unit outputting a signal by detecting the displacement of the contact portion due to the contact portion comes into contact with the waterproof plug.

A crimping die structure according to a second aspect is the crimping die structure according to the first aspect, wherein the abutting portion is elastic with the waterproof plug as the movable die moves to the crimping position. It is characterized in that it is provided in a movable type so as to abut. The crimping die structure according to claim 3 is
2. The crimping die structure according to claim 1, wherein a driving means for moving the abutting portion relative to the movable die, and the abutting portion abutting against the waterproof plug prior to the moving operation of the movable die to the crimping position. Drive control means for controlling the above-mentioned drive means so as to perform.

Further, a crimping die structure according to a fourth aspect is the crimping die structure according to any one of the first to third aspects, wherein the abutting portion is a predetermined portion of the waterproof plug by an action of abutting against the waterproof plug. And a position correcting portion that engages with the portion and corrects the position of the waterproof plug along the longitudinal direction of the electric wire. Further, the crimping die structure according to claim 5 is the crimping die structure according to claim 5, further comprising a receiving portion which is provided on the fixed die and faces the contact portion, and which receives a waterproof plug. The receiving portion engages with a predetermined portion of the waterproof plug pushed by the abutting portion, thereby
It is characterized in that it includes a position correcting portion for correcting the position of the electric wire along the longitudinal direction.

[0012]

According to the structure of the invention according to claim 1, the waterproof plug mounting state detecting means detects the displacement of the contact portion elastically contacting the waterproof plug by the displacement detecting portion,
It detects whether or not the waterproof plug is in a predetermined wearing state. As a result, it is possible to prevent the waterproof connector terminal in which the rubber plug is improperly mounted from flowing out to the process downstream of the main crimping die structure. In the conventional optical detection device using the optical sensor, since the sensor surface of the optical sensor directly faces the electric wire, the sensor surface is likely to be contaminated with the lubricating oil. Even if is used, this optical sensor only needs to detect the displacement of the contact portion,
Therefore, as a result that the sensor surface of the optical sensor does not have to face the electric wire, it is possible to prevent the sensor surface from being soiled.

According to the structure of the invention according to claim 2,
The contact portion provided on the movable die elastically contacts the waterproof plug as the movable die moves to the crimping position. Since the attachment state of the waterproof plug can be detected at the same time as the crimping operation, it is more efficient than the case where these are performed separately. According to the configuration of the invention according to claim 3, the contact portion moved by the drive means is moved prior to the moving operation of the movable die to the crimping position.
Abut on the waterproof plug. Since it is possible to detect improper mounting of the waterproof plug before the terminal is crimped, it is possible to prevent the terminal from being crimped to an electric wire in which the waterproof plug is misaligned or an electric wire without the waterproof plug.

According to the configuration of the invention of claim 4,
When the contact portion comes into contact with the waterproof plug of the positioned electric wire, the position correcting portion provided at the contact portion engages with the predetermined portion of the waterproof plug by this abutting operation, whereby the waterproof plug has
Correct the position of the wire along the longitudinal direction. According to the configuration of the invention according to claim 5, the position correcting portion provided in the receiving portion for receiving the waterproof plug on the fixed mold side engages with the predetermined portion of the waterproof plug pushed by the contact portion, The position of the waterproof plug along the longitudinal direction of the electric wire is corrected.

[0015]

Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments. FIG. 1 is a schematic side view showing a main part of a crimping die structure according to an embodiment of the present invention. Referring to FIG. 1, the crimping die structure A has a rubber stopper 1A as a waterproof stopper. It is for crimping the crimp terminal T to the end portion of the fitted electric wire W, and is usually detachably attached to the terminal crimping machine as an application unit.

The main pressure-bonding die structure A is composed of a lower die unit LU and an upper die unit UU. The lower mold unit LU includes a lower frame 10 fixed to a machine frame (not shown) of an applicator, an anvil 12 as a fixed mold fixed to an upper surface of the lower frame 10, and an upper part of the anvil 12 above the anvil 12. It includes a movable crimper 13 which is arranged. A shank (not shown) is connected to the upper mold unit UU so as to be vertically movable in the machine frame and is linked to a press ram (not shown) of the terminal crimping machine.
On the other hand, the upper frame 11 is fixed so as to be vertically movable integrally
And a pair of crimper holding portions 14A and 14B fixed to the upper frame 11 and holding the crimper 13, a rubber plug mounting state detection mechanism 15 provided in the front side crimper holding portion 14A, and a vertical direction with respect to the anvil 11. A slide cutter 16 that is movably provided is included.

The crimper 13 is a core wire W1 of the electric wire W.
On the other hand, the wire crimper portion 13A for crimping the wire barrel portion Ta of the crimp terminal T and the covering portion W2 of the electric wire W
It includes an insulation crimper portion 13B for crimping the insulation barrel portion Tb of the crimp terminal T with respect to the rubber plug 1A fitted in. Anvil 12 above
Is a wire anvil portion 12A which receives a crimping load by the wire crimper 13A through the crimp terminal T,
It has a known configuration including an insulation anvil portion 12B that receives a caulking load from the insulation crimper portion 13B via the crimp terminal T.

The end of the electric wire fitted with the rubber plug and stripped off is the chucking arm of the rotary transfer part (turntable) as shown in FIG. 11 of Japanese Patent Publication No. 3-5029, for example (this embodiment). (Corresponding to the arm CA of FIG. 1), it is transferred in a state of being clamped and positioned at a predetermined position between the anvil 12 and the crimper 13 of the main pressure-bonding die structure. On the other hand, crimp terminals T connected in a chain in a direction orthogonal to the plane of the drawing are intermittently fed to the predetermined position on the anvil 12 one by one in synchronization with the feeding of one electric wire. It is like this.

The slide cutter 16 is supported so as to be vertically movable along the end face of the anvil 12, and a compression coil spring 17 is provided between the slide cutter 16 and the lower frame 10.
Is intervening. With reference to FIGS. 1 and 2, an engaging protrusion 16d is formed along the lower edge of the front surface 16c of the slide cutter 16. On the other hand, a cutter holder CH that holds the slide cutter 16 is fixed to the lower frame 10 so that the slide cutter 16 can move up and down along the end surface of the anvil 12. A stopper portion CH1 for positioning the upper stop position of the slide cutter 16 by contacting the engagement protrusion 16d of the slide cutter 16 is formed at the upper end of the cutter holder CH. On the end surface of the slide cutter 16 on the anvil side, a recess 16b for introducing and holding the end of the crimp terminal T placed on the anvil 12 in a state where the slide cutter 16 is positioned at the upper stop position is provided. Has been formed. That is,
With the slide cutter 16 positioned at the upper stop position, as shown in FIG. 1, the height of the recess 16b can exactly introduce the end of the crimp terminal T placed on the anvil 12. It is designed to be high. Referring to FIG. 2, the upper surface 16a of the slide cutter 16 is pressed by the pressing protrusion 141 (see FIG. 2) on the lower end edge of the crimper holding portion 14A that is lowered during the crimping, so that the slide cutter 16 is Although the compression coil spring 17 descends while contracting, the connection portion of the crimp terminal T introduced into the recess 16b is cut by shearing at this time.

Referring to FIGS. 1 and 2, the rubber plug attachment state detecting mechanism 15 includes a crimper holding section 14A, crimpers 13A and 13B, a crimper holding section 14B and an upper frame 11.
Of the L-shaped cross section, which is movably supported by the above-mentioned members by a bolt B which is sequentially passed through each member and is capable of contacting the bulging portion 5 of the rubber stopper 1A when the crimper 13 descends. The presence or absence of the rubber stopper 1A is detected by the contact member 18, the coil spring 19 interposed between the contact member 18 and the crimper holding portion 14A, and the displacement of the contact member 18,
It includes a proximity switch 20 as a displacement detection unit that outputs a signal to a control unit 30 including a microcomputer or the like. The control unit 30 responds to the signal from the proximity switch 20 to obtain a good blue lamp 31 or a defective red lamp 3.
Turn on 2.

Referring to FIGS. 1 and 2, the abutting member 18 has a plate-shaped main body 18a extending in the vertical direction,
It has a plate-shaped lower end flange portion 18b which is formed at the lower end of the main body portion 18a and comes into contact with the bulging portion 5 of the rubber stopper 1A when the crimper 13 descends. The main body 18a is
It is introduced into the vertical groove portion 142 formed in the crimper holding portion 14A. The body portion 18a is formed with a vertically long slit 18c that allows the bolt B to pass therethrough in a loosely fitted state, whereby the abutting member 18 can move vertically relative to the bolt B. . Further, the upper end portion 18d of the main body portion 18a is adapted to approach the proximity switch 20 described above.

In the crimping operation in the case of the electric wire W with the rubber plug 1A attached, the upper mold unit UU is integrally lowered from the state of FIG. 1, and the crimper 13 is placed between the anvil 12 and the crimper 13 as shown in FIG. The crimp terminal T is crimped with. On the other hand, before the upper mold unit UU reaches the lowermost position, the lower end flange portion 18b of the contact member 18 of the rubber plug mounting state detection mechanism 15 is
The contact member 18 contacts the bulging portion 5 of the rubber stopper 1A, and thereafter, the contact member 18 moves upward relative to the crimper 13 and the crimper holding portions 14A and 14B while bending the coil spring 19. Then, as shown in FIG.
In the state where the lowermost position has reached the lowermost position, the upper end portion 18d of the contact member 18 approaches the proximity switch 20 and the proximity switch 2
An ON signal is output from 0. Upon receiving the ON signal, the control unit 30 turns on the non-defective blue bump 31. A detection sensor (not shown) that detects that the upper mold unit UU has reached bottom dead center is provided, and the control unit 30 uses the proximity switch 20 to trigger the signal input from the detection sensor. It is arranged to judge whether or not there is a signal.

On the other hand, in the crimping operation for the electric wire W to which the rubber plug 1A is not attached, as shown in FIG. 4, the contact member 18 causes relative displacement with respect to the crimper 13 and the crimper holding portions 14A and 14B. In this case, the upper end portion 18d of the contact member 18 is not brought close to the proximity switch 20 and therefore the control unit 30 cannot obtain a signal from the proximity switch 20. Can be determined as the non-wearing of the rubber plug 1A. Control unit 30
Determines that the defective product is defective, the defective red lamp 32 is turned on. In addition, the warning sound such as buzzer is emitted,
It is also possible to notify the operator. The operator notified by the red lamp 32 or the like can eliminate the defective product when the defective electric wire W is discharged to the discharge tray or the discharge conveyor of the continuous terminal crimping machine.

As described above, according to this embodiment, the proximity switch 20 detects the displacement of the contact member 18 that comes into contact with the rubber plug 1A during the crimping operation to determine whether the rubber plug 1A is in the predetermined mounting state. Since it is possible to detect whether or not it is, it is possible to prevent the waterproof connector terminal to which the rubber plug 1A is not attached from flowing out to the process downstream of the main pressure bonding mold structure.

Further, since the proximity switch 20 is used instead of the optical sensor, the presence / absence of the rubber stopper 1A can be surely detected without being affected by the scattering of the lubricating oil applied to the rubber stopper 1A. Therefore, it is possible to more reliably prevent the outflow of defective products. Furthermore, if the proximity switch 2
Even if an optical sensor is used instead of 0, this optical sensor only needs to detect the displacement of the contact member 18, and therefore the sensor surface of the optical sensor does not have to be opposed to the electric wire. It is possible to prevent the sensor surface from being contaminated by the above, and thus it is possible to prevent the outflow of defective products due to the detection failure due to the scattering of the lubricating oil.

In addition, since the mounting state of the rubber stopper 1A can be detected at the same time as the crimping operation (lowering operation of the crimper 13),
This is more efficient than the case where these are carried out separately in order, and it is possible to perform terminal crimping at high speed. 5 to 10 show another embodiment of the present invention.
Referring to FIG. 5, the present embodiment mainly differs from the embodiment of FIG. 1 in that a contact member 40 is used instead of the contact member 18, and a rubber plug 1A is attached to a lower end portion 41 of the contact member 40. The position correcting portion 50 for correcting the relative position of the position of the electric wire W to the electric wire W is formed, and the slide cutter 60 is used in place of the slide cutter 16, and the relative position of the rubber plug 1A to the electric wire W is provided at the upper end portion of the slide cutter 60. That is, the position correcting section 70 for correcting the above is formed. In this embodiment, when the presence or absence of the rubber plug 1A is detected, the position of the rubber plug 1A with respect to the electric wire W is corrected by the position correcting portions 50 and 70.

Referring to FIG. 5, the abutting member 40 has a substantially L-shaped cross section, and a groove portion 42 that opens downward is formed in a lower end portion 41 of the abutting member 40. Referring to FIG. 6 which is an enlarged view, the groove portion 42 includes a pair of facing parallel wall surfaces 43 and 44 near the groove bottom side, and an inclined guide surface 45 continuous below the parallel wall surfaces 43 and 44. , 46, and the inclined guide surfaces 45, 46 and the parallel wall surfaces 43, 44 constitute the position correcting section 50.

The inclined guide surfaces 45 and 46 are inclined by an angle θ with respect to the vertical line, and when the upper mold unit UU descends, the inclined guide surfaces 45 and 46 are attached to the rubber stopper 1A. By contacting both edges of the bulging portion 5, the bulging portion 5 of the rubber plug 1A is guided to the parallel wall surfaces 43 and 44,
As shown in FIGS. 7 and 8, the rubber plug 1A is positioned at a proper position with respect to the electric wire W by the parallel wall surfaces 43 and 44. If the bulging portion 5 of the rubber plug 1A displaced with respect to the electric wire W is within the range shown by d in FIG. 8, the position of the bulging portion 5 can be corrected. Further, the upper end portion 47 of the contact member 40 which is moved to the position facing the proximity member 20 is formed with a recess 48 for avoiding proximity to the proximity switch 20 in the above facing state. The contact member 40 has the same structure as that of the embodiment of FIG. 1 and is movable up and down with respect to the crimper holding portion 14A and the crimper 13. However, in order to loosely fit the bolt B of FIG. The slits and the like formed in the main contact member 40 are not shown.

Referring to FIG. 6, the position correcting section 70 is
It is formed symmetrically with respect to the position correcting section 50. That is, the position correcting portion 70 has the parallel wall surface 6 in the groove portion 62 formed in the upper end portion 61 of the slide cutter 60.
3, 64 and inclined guide surfaces 65, 66. The position correcting unit 70 cooperates with the position correcting unit 50 on the contact member 40 side to correct the position of the rubber stopper 1A.

Since the other structures are the same as those of the embodiment of FIG. 1, the same reference numerals are given to the drawings and the description thereof is omitted. Although illustration and description of the control unit 30 and the lamps 31 and 32 are omitted, they are the same as in the embodiment of FIG. Next, the operation of each part according to the mounting state of the rubber plug will be described. First, when the rubber plug 1A is mounted so that the bulging portion 5 thereof is in the range of d, as shown in FIGS. 7 and 8, the position of the rubber plug 1A is corrected and contact is made. A portion of the upper end portion 47 of the member 47, which is higher than the concave portion 48, is closely opposed to the proximity switch 20. As a result, the proximity switch 20 outputs an ON signal and it is determined that the rubber plug 1A is attached. Predetermined processing similar to that in the embodiment of FIG. 1 is performed.

Next, when the rubber plug 1A is not attached, as shown in FIG. 9, the upper end portion 47 of the contact member 40 cannot reach the proximity switch 20, and the proximity switch 20 outputs an ON signal. do not do. As a result, it is determined that the rubber plug 1A is not attached, and the predetermined processing similar to that in the embodiment of FIG. 1 is performed. Next, in the case where the rubber plug 1A is mounted but the amount of positional deviation is large and the bulging portion 5 extends beyond the range indicated by d, as shown in FIG. It cannot be housed inside, and the peripheral wall portion of the groove portion 42 comes into contact with the bulging portion 5. Then, in this state, the contact member 4
The recess 48 formed in the upper end 47 of the
However, the proximity switch 20 does not output an ON signal. As a result, it was determined that the rubber stopper 1A was not properly attached,
Predetermined processing similar to that in the embodiment of FIG. 1 is performed.

According to this embodiment, in addition to the same operational effects as the embodiment of FIG. 1, the position correcting section 50,
By the action of 70, if the positional deviation of the rubber plug 1A with respect to the electric wire W is a predetermined amount or less, it can be corrected. FIG. 11 shows another embodiment of the present invention, showing a modification of the embodiment of FIG. Referring to the figure, the present embodiment differs from the embodiment of FIG. 5 in that in the embodiment of FIG. 5, the electric wire W is supplied to a predetermined position by the arm CA of the continuous terminal crimping machine. In the example, the tip of the core wire W1 of the electric wire W is abutted against the stopper plate S while the electric wire W is gripped by the hand H so as to be positioned. The other structure is similar to that of the embodiment shown in FIG. 5, and therefore the same reference numerals are given in the drawing and the description thereof is omitted. Also in this embodiment,
The same effect as the embodiment of FIG. 5 is obtained.

FIG. 12 shows still another embodiment of the present invention, which is a modification of the embodiment of FIG. Referring to the figure, the present embodiment is different from the embodiment of FIG. 5 in that in the embodiment of FIG. 5, the mounting state of the rubber plug 1A is detected at the same time as the crimping operation in which the crimper 13 descends. On the other hand, in the present embodiment, the mounting state of the rubber plug 1A is detected prior to the crimping operation. For this reason,
In this embodiment, the crimper holding portion 14A is provided with the upper frame 11,
A rod of an air cylinder as a driving means that is provided movably up and down with respect to the crimpers 13A and 13B and the crimper holding portion 14B, and lowers the movable crimper holding portion 14A prior to the lowering operation of the upper mold unit UU. It is attached to 81 so that it can move integrally.

Although not shown, the above air cylinder 8
0 is fixed to a fixed part such as a machine frame of the applicator. The rod 81 is freely expanded and contracted while penetrating the upper frame 11. Further, a solenoid valve 93 for switching between a first state in which the air pressure passage 92 connected to the air cylinder 80 and the pump side air pressure passage 90 are connected and a second state in which the air pressure passage 92 is connected to the drain passage 91. And the control unit 94 switches the solenoid valve 93 to the first state prior to the lowering operation of the upper mold unit UU.
After that, the state is returned to the second state. Note that the control unit 94 makes the lamps 31 and 32 light according to the signal from the proximity switch 20, as in the embodiment of FIG. The other structure is similar to that of the embodiment of FIG. 5, and therefore the same reference numerals are given to the drawing and the description thereof is omitted.

According to this embodiment, in addition to the same effects as the embodiment of FIG. 5, the air cylinder 80 contacts the rubber plug 1A prior to the crimping operation in which the upper mold unit UU is lowered. As a result, the defective attachment of the rubber plug 1A can be detected before the crimp terminal T is crimped. Therefore, it is possible to prevent the crimp terminal T from being crimped to the electric wire W in which the rubber stopper 1A is misaligned or the electric wire W without the rubber stopper 1A, and it is possible to reliably prevent production of a defective product.

The present invention is not limited to the above embodiments, but can be implemented as a combination of the embodiments. For example, the embodiment shown in FIGS. 1 and 12 can be applied as a manual pressure-bonding product like the embodiment shown in FIG. In addition, in the embodiment of FIG.
As in the second embodiment, it is possible to detect the mounting state of the rubber plug before the crimping operation. On the contrary, in the embodiment of FIG. 12, the position may not be corrected as in the embodiment of FIG. Besides, various design changes can be made to the present invention.

[0037]

According to the invention of claim 1, the waterproof plug mounting state detecting means detects the displacement of the contact portion elastically contacting the waterproof plug by the displacement detecting portion,
It detects whether or not the waterproof plug is in a predetermined wearing state. As a result, it is possible to prevent the waterproof connector terminal in which the rubber plug is improperly mounted from flowing out to the process downstream of the main crimping die structure. Further, even if an optical sensor is used as the displacement detection unit, this optical sensor only needs to detect the displacement of the contact portion, and therefore the sensor surface of the optical sensor does not have to face the electric wire. It is possible to prevent the sensor surface from being contaminated, and thus to prevent the outflow of defective products due to defective detection.

According to the second aspect of the invention, the abutment portion provided on the movable die elastically abuts the waterproof plug as the movable die moves to the crimping position. Since the mounting state of the waterproof plug can be detected at the same time as the crimping operation, it is more efficient than the case where these are performed separately, and thus the terminal crimping can be performed at high speed. According to the invention of claim 3, the contact portion moved by the drive means is brought into contact with the waterproof plug prior to the movement operation of the movable die to the crimping position.
Since it is possible to detect improper mounting of the waterproof plug before the terminal is crimped, it is possible to prevent crimping of the terminal to the electric wire where the waterproof plug is misaligned or the electric wire without the waterproof plug, ensuring the manufacture of defective products. It can be prevented.

According to the fourth aspect of the present invention, when the abutting portion comes into contact with the waterproof plug of the positioned electric wire, the position correcting portion provided at the abutting portion causes the waterproof plug to have a predetermined position. Engages with the section, thereby correcting the position of the waterproof plug along the longitudinal direction of the wire. As a result, the terminal can be crimped to the end of the electric wire with the waterproof plug in the correct position, and defective products can be prevented from being manufactured.

According to the fifth aspect of the present invention, the position correcting portion provided on the receiving portion for receiving the waterproof plug on the fixed mold side engages with the predetermined portion of the waterproof plug pushed by the contact portion. The position of the waterproof plug along the longitudinal direction of the electric wire is corrected in cooperation with the position correcting portion of the contact portion. As a result, the terminal can be crimped to the end of the electric wire in a state where the waterproof plug is arranged at the correct position, and the production of defective products can be prevented more reliably.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a crimping die structure according to an embodiment of the present invention in a mold open state.

FIG. 2 is an exploded perspective view of a main part of the crimping die structure.

FIG. 3 is a partial cross-sectional side view of a crimping die structure at the time of crimping when a rubber plug is attached.

FIG. 4 is a partial cross-sectional side view of a crimping die structure at the time of crimping when a rubber plug is not attached.

FIG. 5 is a partial cross-sectional side view of a crimping die structure according to another embodiment of the present invention in a mold open state.

6 is an enlarged view of a main part of the crimping die structure of FIG.

FIG. 7 is a partial cross-sectional side view of the crimping die structure at the time of crimping when the displacement of the rubber plug is small.

FIG. 8 is an enlarged view of a main part of the crimping die structure in the state of FIG.

FIG. 9 is a partial cross-sectional side view of a crimping die structure at the time of crimping when a rubber plug is not attached.

FIG. 10 is a partial cross-sectional side view of the crimping die structure at the time of crimping in the case where the displacement of the rubber plug is large.

11 is a partial cross-sectional side view of the crimping die structure in the mold open state showing a modification of the embodiment of FIG.

12 is a partial cross-sectional side view of the crimping die structure during crimping, showing still another modification of the embodiment of FIG.

13A and 13B are schematic views showing an example of a rubber plug which has been conventionally used, in which FIG. 13A is a front view and FIG. 13B is a side view.

14A and 14B are schematic views showing another example of a rubber plug which has been conventionally used, in which FIG. 14A is a front view and FIG. 14B is a side view.

15 (a) and 15 (b) are front views of the waterproof connector terminal showing the usage states of the rubber plugs of FIGS. 13 and 14, respectively.

FIG. 16 is a schematic view sequentially showing steps of manufacturing a waterproof connector terminal.

[Explanation of symbols]

 UU Upper mold unit LU Lower mold unit W Electric wire 1A Rubber stopper (waterproof stopper) T Crimp terminal 12 Anvil (fixed type) 13 Crimper (movable type) 15 Rubber stopper attachment state detection mechanism 16 Slide cutter 18 Contact member 20 Proximity switch 30 Control unit 40 Contact member 50 Position correction unit 60 Slide cutter 70 Position correction unit 80 Air cylinder (driving means) 94 Control unit

Claims (5)

[Claims] 1. A fixed die, on which a crimp terminal is set, and a movable die provided between a crimping position adjacent to the fixed die and a separated position farther from the fixed die than the crimping position,
Also, by moving to the crimping position, the crimping terminal set in the fixed mold is attached to the end portion of the electric wire positioned at a predetermined position and the waterproof waterproof plug fitted to the end portion,
In a crimping die structure including a movable die for collectively crimping, a waterproof plug mounting state detecting means for detecting whether or not the waterproof plug is in a predetermined mounting state at an end of the electric wire set in the predetermined position. The rubber plug mounting state detecting means further comprises: a contact portion which is movable relative to the movable mold along a moving direction of the movable mold and elastically contacts the waterproof plug; and the contact portion. And a displacement detection section that outputs a signal by detecting the displacement of the contact portion caused by the contact with the waterproof plug. 2. The crimping die structure according to claim 1, wherein the abutting portion is provided on the movable die so as to elastically abut the waterproof plug in accordance with the movement operation of the movable die to the crimping position. A crimping die structure characterized in that 3. The crimping die structure according to claim 1, wherein a driving means for moving the contact portion relative to the movable die, and the contact portion prior to the moving operation of the movable die to the crimping position. A crimping die structure, further comprising drive control means for controlling the drive means so as to contact the waterproof plug. 4. The crimping die structure according to any one of claims 1 to 3, wherein the abutting portion engages with a predetermined portion of the waterproof plug by an action of abutting the waterproof plug, A crimping die structure comprising a position correcting portion for correcting the position of the electric wire along the longitudinal direction. 5. The crimping die structure according to claim 4, further comprising a receiving portion which is provided on the fixed die so as to face the abutting portion and which receives the waterproof plug, and the receiving portion is the abutting portion. A crimping die structure comprising a position correcting portion for correcting the position of the waterproof plug along the longitudinal direction of the electric wire by engaging with a predetermined portion of the waterproof plug pushed by.