JPH07176358A - Motor-driven terminal crimp tool - Google Patents

Abstract

PURPOSE:To facilitate an operation for gripping terminals during a crimping operation. CONSTITUTION:A pair of crimpers 3, 3 is rotatably journalled near the end of a case 1 and a link mechanism for opening and closing the outer ends 3a, 3a of the crimpers is provided at the inner ends of the crimpers 3, 3. A pressure member 10 that is threaded into a spiral rod 9 joined to a reversely rotatable motor 7 and can move back and forth with respect to the link mechanism is provided within the case 1. A pressure spring 11 for pressing and closing the crimper outer ends 3a, 3a and a manual lever 12 that works to open the crimper outer ends 3a, 3a are provided. The crimper outer ends 3a, 3a being closed by the pressure spring 11 are opened by the action of the manual lever 12 to put in terminals, and the manual lever 12 is released and the terminals are gripped by the crimper outer ends 3a, 3a. Then the control portion 14 of a control switch mechanism is turned on to drive the reversely rotatable motor 7 in the normal direction to crimp the terminals. Since the terminals are gripped using the manual lever 12 and the pressure spring 11, gripping forces can be fine-tuned, facilitating the crimping operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal crimping tool for crimping and connecting a terminal to an electric wire, and in particular, a pair of crimpers are opened and closed by electric power of a forward / reverse rotation motor driven by a battery. The present invention relates to an electric terminal crimping tool configured to crimp. By the way, in the present invention, opening and closing of the pair of crimpers means opening and closing of the outer ends of the crimpers. Opening of the crimper outer ends means movement of the outer ends away from each other, and closing of the crimpers means that the crimping members are closed. It means the movement of the edges approaching or touching each other.

[0002]

2. Description of the Related Art Conventionally, in this type of electric terminal crimping tool, a pair of crimpers for axially rotatably supporting the tip of the case and clamping the terminals by clamping the terminals at the outer ends thereof, and the crimpers are opened. An urging member for urging the link member, a link mechanism in which the other end portions of a pair of links each of which has one end portion pivotally attached to the inner end of each crimping element are pivotally attached to each other; The pressing member having a female spiral hole on the center line, and a spiral rod screwed into the female spiral hole of the pressing member and connected to a forward / reverse rotation motor driven by a battery, and the forward / reverse rotation motor. Some have a forward / reverse rotation drive and an operation switch for stopping. Some forward / reverse rotation motors are equipped with a load detector that stops when the load received from the outer end of the crimping element exceeds a predetermined value during crimping by normal rotation.

When the forward / reverse rotation motor is normally rotated by the switch while the crimping element is opened by the biasing member, the spiral rod rotates on its own axis, and the pressing member screwed to the spiral rod is linked. Moving toward the mechanism, the tip of the pressing member presses the other ends (pivotally attached parts) of both links of the link mechanism. Both the pressed links act to push open the inner ends of both crimpers, and the crimpers rotate about the support shaft to close their outer ends so that the terminals can be crimped. When the forward / reverse rotation motor is reversely rotated, each member operates in the opposite manner to the above case, and the tip of the pressing member separates from the link mechanism.

To perform a terminal crimping operation with this electric terminal crimping tool, first, the forward / reverse rotation motor is reversely rotated and stopped, and the outer end of the crimping terminal is opened. Here, for example, while holding the ring-shaped terminal in one hand between the crimper outer ends, operate the switch with the other hand to rotate the forward / reverse rotation motor forward, and both crimpers lightly grasp the terminals. At that point, the forward / reverse rotation motor is stopped. Then, the tip of the electric wire is inserted into the inside of the ring-shaped terminal with the one hand, and the forward / reverse rotation motor is normally rotated to crush the terminal to crimp the terminal and the electric wire.

[0005]

During the above-mentioned work, it is difficult to stop the forward / reverse rotation motor so that the terminal is lightly gripped by the outer end of the crimp, and in particular, when the terminal has a plurality of sizes, It was difficult to properly handle the size of, and this work required skill. That is, when an unskilled operator operates the conventional electric terminal crimping tool,
Not only does the forward / reverse rotation motor stop too early to grasp the terminal, but on the contrary, it delays and crushes the terminal, the switch operation for grasping the terminal with the crimp is wrong, and the fingertip with the crimp is used. It had the drawback of being easily pinched and injured.

An object of the present invention is to solve the above-mentioned drawbacks of the conventional example, and an object thereof is to provide an electric terminal crimping tool which solves the problem.

[0007]

An electric terminal crimping tool according to the present invention comprises, for example, a pair of crimpers 3, 3 axially supported by a bearing 2 projecting from the tip of a substantially cylindrical case 1. The forward / reverse rotation motor 7 is driven and stopped by the operation portion 14 of the switch mechanism provided on the outside of the case 1, and is connected to the forward / reverse rotation motor 7 extending in the longitudinal direction of the case 1 and rotating on its own axis. A spiral rod 9 and a nut portion 10a that is screwed onto the spiral rod 9 and is movable in the longitudinal direction of the case 1 so as to be movable back and forth.
Is provided at the inner ends of the crimpers 3 and 3, and is located opposite to the tip of the pressing portion 10b of the pressing member 10, and when pressed by the movement of the pressing member 10, the crimping member outer end 3a, And a link mechanism acting to close 3a,
A pressing spring 11 as a biasing member that constantly presses the link mechanism from the pressing member 10 side to bias the crimper outer ends 3a, 3a is provided, and an outer side near the inner ends of the crimpers 3,3. By pressing the portion, the pressing spring 11
A manual lever 12 that acts to open the crimper outer ends 3a, 3a is provided. Further, a limit switch mechanism is provided so that the forward / reverse rotation motor 7 can be stopped when the pressing member 10 moves beyond a predetermined range.

[0008]

[Function] When the terminal is crimped, the pressing spring 11 is first
Grip the manual lever 12 together with the case 1 with the crimping piece whose outer end is closed by the crimping piece 3,
3 Press the outer part near the inner end to open the crimper outer ends 3a, 3a, and insert the terminal between them. Manual lever 1 here
When the grip of 2 is loosened or released, the ring-shaped terminal (not shown) is gripped with such a force that the outer ends 3a, 3a of the crimping member are not dropped by the urging force of the pressing spring 11. After gripping the terminal in this way, an electric wire (not shown) is inserted into the hole of the terminal with one hand, the switch 14 is put in, the forward / reverse rotation motor 7 is normally rotated to crush the terminal, and the crimping work is completed. Crimper outer end 3a,
When grabbing the terminal with 3a, the biasing force of the pressing spring 11 is used instead of the electric force, so that even an inexperienced worker does not crush the terminal, and one hand holds the electric wire and the other hand. Since the hand of the operator has the manual lever 12, the operator accidentally touches the operating portion 14 of the switch mechanism to operate the forward / reverse rotation motor 7, and the fingertips are pressed against the outer ends 3a, 3a of the crimping element.
There is no danger of being injured by being caught in. Since the limit switch mechanism is provided, not only is it possible to prevent the pressing member 10 from proceeding beyond a predetermined range and to apply an unreasonable load to the forward / reverse rotation motor 7, but also to require a load detector as in the conventional example. Therefore, the manufacturing cost can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. Here, the drawings show an embodiment of the present invention, FIG. 1 is a vertical sectional front view showing a state in which an outer end of a crimp is opened to some extent, and FIG. 2 is a partial front view showing a state in which an outer end of a crimp is closed. 3 is a partial plan view of the same, FIG. 4 is a schematic cross-sectional view taken along line XX of FIG. 1 for explaining the positional relationship between the switch mechanism and the limit switch mechanism, omitting the internal mechanism of the forward / reverse rotation motor, and FIG. FIG. 2 is a schematic cross-sectional view taken along the line YY of FIG. 1 for explaining the connection between the spiral rod and the pressing member.

As shown in FIGS. 1 to 3, a bearing 2 having bearing plates 2a, 2a facing each other at the tip of a substantially cylindrical case 1
And a pair of upper and lower (in FIG. 2) plate-like crimpers 3 and 3 are fitted between the bearing plates 2a and 2a, and the outer ends 3a and 3a of the crimpers are opened and closed by the spindles 4 and 4. It is pivotally supported by. A link mechanism is provided on the inner ends of the crimpers 3 and 3, respectively, in which links 5 and 5 are pivotally attached, and free ends of the links 5 and 5 are pivotally attached to each other with a connecting link 6 interposed therebetween. . In this mechanism, when a pressure is applied to the connecting link 6, a force that pushes apart both links 5 and 5 from each other is applied to the inner ends of the crimpers 3 and 3, and the support shafts 4 and 4 are centered. The crimpers 3 and 3 are rotated to close the crimper outer ends 3a and 3a.

As shown in FIG. 1, a forward / reverse rotation motor 7 capable of forward / reverse rotation driving and stopping is disposed on the end side of the case 1 opposite to the crimpers 3 and 3, and the forward / reverse rotation is performed. A spiral rod 9 extending in the longitudinal direction of the case 1 is connected to the rotary shaft of the motor 7 via a speed reducer 8. Then, the spiral rod 9 rotates on its own axis in response to the rotation of the forward / reverse rotation motor 7.

As shown in FIGS. 1, 3 and 5, a female spiral hole which is screwed on the center line of the spiral rod 9 on the center line is formed in the substantially central portion of the case 1, and the case 1 has a longitudinal direction. The nut portion 10a arranged so as to be able to move forward and backward, the pressing portion 10b fixed to the nut portion 10a so that the axial portion of the tip faces the link mechanism, and the nut portion 10a fixed to the case 1. Guides 10c, 1 for supporting forward and backward movement
The pressing member 10 composed of 0c is arranged. The pressing member 10 receives the rotation of the spiral rod 9 and moves in the advancing / retracting direction.

As shown in FIGS. 1 to 3, the pressing member 1 is
Between 0 and the link mechanism, there is provided a pressing spring 11 which is a biasing member for biasing the pressing portion 10b in a direction in which the pressing portion 10b and the link mechanism are separated from each other. This pressure spring 11
Is to apply a pressing force to the connecting link 6 of the link mechanism so as to close the crimper outer ends 3a, 3a.

As shown in FIGS. 1 to 3, on the upper side (in FIG. 2) of the support shafts 4 and 4 of the bearing 2, the base end of a manual lever 12 as an opening tool is rotatable at both ends thereof. Is supported by. The manual lever 12 is formed so as to gradually become thinner from the base end toward the free end, and a pressing piece 13 is provided on the back surface side at a position separated from the base end by a predetermined length. The pressing piece 13 is positioned so as to come into contact with the outer side portion near the inner end of the upper side (in FIG. 2) of the crimpers 3, 3. And the crimper outer end 3a,
When the lever 3a is closed (see FIG. 2), the manual lever 12
Hold the case 1 and the free end side of the manual lever 12 to the case 1
When pressed to the side, the pressing piece 13 descends and the crimpers 3, 3
The inner end is closed and the crimper outer ends 3a, 3a are opened, and the state shown in FIG. 1 is obtained.

The forward / reverse rotation motor 7 is constructed so as to be normally / reversely rotated and stopped by a switch mechanism. As shown in FIG. 1, FIG. 2, FIG. 4 and FIG. 5, the switch mechanism includes a slidable operation unit 1 arranged outside the case 1.
4, a switch part 15 electrically connected to the forward / reverse rotation motor 7, an on / off part 16 for inserting / disconnecting the switch part 15, and a connecting body 17 for connecting the on / off part 16 and the operating part 14. Consists of. The switch part 15 has switch pieces 15a, 15a which can come into contact with an insert piece 16a provided in the insert / release part 16, and stops when the insert piece 16a is located between the switch pieces 15a, 15a. When the switch piece 15a on the front end side is contacted, it is rotated normally, and when it is contacted with the switch piece 15a on the rear end side of the case 1, it is reversely rotated.

Further, the forward / reverse rotation motor 7 is configured to stop the forward / reverse rotation motor 7 when the position of the pressing member 10 is out of a predetermined range by the limit switch mechanism. As shown in FIGS. 1, 4 and 5, the limit switch mechanism includes a switch piece 19a electrically connected to the operating portion 18 attached to the nut portion 10a of the pressing member 10 and the forward / reverse rotation motor 7. 19a (only the front side in FIG. 4 is shown), and the forward / reverse rotation motor 7 in the range where the insertion piece 20a is between the switch pieces 19a, 19a.
The switch is turned on (either forward or reverse rotation is determined by switching of the switch mechanism), and the turn-on / off part 20 configured to turn off the switch outside the range is connected to the turn-on / off part 20 and the operating part 18. It is composed of a connecting body 21. When the actuating portion 18 slides in the longitudinal direction of the case 1 by the movement of the pressing member 10, the insertion piece 20a of the insertion / disconnection portion 20 also moves, and when it is disengaged from between the switch pieces 19a, 19a, that is, one of the switch pieces 19a. The forward / reverse rotation motor 7 is stopped when the insert piece 20a contacts.

The forward / reverse rotation motor 7 is driven by a battery (not shown) removably connected to the rear end of the case 1 via an adapter 22 which is detachable. The battery is configured so that it can be attached to a waist belt or the like of an operator.

Next, a terminal crimping work using the electric terminal crimping tool according to this embodiment will be described. First, the pressing spring 11
When the outer ends 3a, 3a of the crimpers are closed (see FIG. 2), when the manual lever 12 and the case 1 are gripped together and the manual lever 12 is pressed toward the case 1, the outer ends 3a, 3a of the crimpers are opened. Ring-shaped terminal (not shown)
Is inserted between the crimper outer ends 3a, 3a. Here, when the grip of the manual lever 12 is loosened or released, the terminal is gripped with a force that does not cause the outer ends 3a, 3a of the crimping elements to drop due to the urging force of the pressing spring 11. When the terminal is gripped in this way, an electric wire (not shown) is inserted into the terminal with one hand, and the operation portion 14 of the switch mechanism is inserted.
Slide to the tip of Case 1 and insert it into the forward rotation side. By this switching, the forward / reverse rotation motor 7 is normally rotated and the terminals are crushed, and the crimping work is completed.

In this embodiment, the crimper outer ends 3a, 3a are used.
When grasping the terminal with, press the spring 11
Since the urging force of is used, even an inexperienced worker will not crush the terminal, and since one hand holds the electric wire and the other hand holds the manual lever 12,
Since the operator does not accidentally touch the operating portion 14 of the switch mechanism, there is no risk of accidental operation and the injury of being caught by the fingertips being sandwiched between the crimper outer ends 3a, 3a. Further, since the limit switch mechanism is interlocked with the movement of the pressing member 10 to prevent the pressing member 10 from moving beyond a predetermined range, the forward / reverse rotation motor 7 is not subjected to an unreasonable load, and load detection as in the conventional example is performed. There is an advantage that the manufacturing cost and the like can be reduced without requiring a container. Furthermore, since the battery is separate from the case 1, the case 1 has the advantages of being lightweight and having high operability.

In the above embodiment, the manual lever 12, which is the opening tool, is pivotally supported by the support shaft 4 of the bearing 2. However, the opening lever may be directly supported near the tip of the case 1, and the opening tool may be crimped. A structure different from that of the manual lever 12 may be used as long as the outer ends 3a, 3a can be opened. The mechanism for preventing the pressing member 10 from moving beyond the predetermined range and imposing an unreasonable load on the forward / reverse rotation motor 7 is not limited to the limit switch mechanism. The present invention is not limited to the above-described embodiments, such as providing an indicator lamp to be turned on.

[0021]

As described above, according to the present invention, when the terminal is gripped by the crimping element, the biasing force of the manual lever and the pressing spring is used instead of the electric force. Since the switch is not crushed and the switch is not touched by mistake, there is an effect that there is no danger of being inadvertently actuated and the fingertip being caught by the outer end of the crimping device, resulting in injury.

Further, since the limit switch mechanism is interlocked with the movement of the pressing member, there is an effect that the load detector is not required and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a state in which an outer end of a crimping piece is opened to some extent.

FIG. 2 is a partial front view showing a state in which the outer end of the crimper is closed.

FIG. 3 is a partial plan view of the same.

FIG. 4 is a schematic cross-sectional view taken along line XX of FIG. 1 for explaining the relationship between the switch mechanism and the limit switch mechanism, omitting the internal mechanism of the forward / reverse rotation motor.

FIG. 5 is a view for explaining the connection between the spiral rod and the pressing member.
2 is a schematic cross-sectional view taken along line YY of FIG.

[Explanation of symbols]

 1 Case 2 Bearing 3 Crimper 3a Crimper outer end 5 Link 7 Forward / reverse rotation motor 9 Spiral rod 10 Pressing member 10a Nut part 11 Pressing spring 12 Manual lever 14 Operating part 15 Switch part 16 On / off part 18 Actuating part 19 Switch part 20 on / off part

Claims (2)

[Claims] 1. A pair of crimpers pivotally supported in an exposed state so as to be openable and closable in the vicinity of the front end of the case, and a forward / reverse rotation motor provided in the case that is normally / reversely rotated and stopped by operating an operating portion of a switch mechanism. A spiral rod extending in the longitudinal direction in the case and connected to the forward-reverse rotation motor so as to rotate on its own axis, and a screw rod that is screwed into the spiral rod and has a tip projecting out of the case. An electric terminal crimping tool having a pressing member that can move forward and backward and a link mechanism that is provided on the inner end side of the crimping member and that is pressed by the tip of the pressing member to close the outer end of the crimping member. A biasing member for biasing the crimper outer end to close, and a manual opening tool capable of opening the crimper outer end against the biasing force of the biasing member. Type terminal crimping tool. 2. A pair of crimping members that are rotatably supported in the exposed state near the tip of the case so as to be openable and closable, and a forward / reverse rotation motor provided in the case that is normally / reversely rotated and stopped by operating an operating portion of a switch mechanism. A spiral rod extending in the longitudinal direction in the case and connected to the forward-reverse rotation motor so as to rotate on its own axis, and a screw rod that is screwed into the spiral rod and has a tip projecting out of the case. An electric terminal crimping tool having a pressing member that can move forward and backward and a link mechanism that is provided on the inner end side of the crimping member and that is pressed by the tip of the pressing member to close the outer end of the crimping member. The electric terminal crimping tool is provided with a limit switch mechanism which is connected to the pressing member and forcibly stops the forward / reverse rotation motor when the pressing member moves beyond a predetermined range.