JPH04370682A - Motor-driven crimp tool - Google Patents

Abstract

PURPOSE:To provide a motor-driven crimp tool which is of lightweight construction, easy to handle, and presents good maneuverability and thereby carrying out crimping of a terminal properly. CONSTITUTION:A pair of crimp dies 11 put a crimp-type terminal 1 in pressure attachment through the crimping motion. The dies 11 are actuated into one run of crimping motion by a motor 5, which is operated for a certain specified time in correspondence to the trigger 31 releasing operation, and are kept operating until the solderless terminal is provisionally crimped by a provisional crimp member 42. In this period, the trigger 31 releasing operation will be hindered by a locking means 46.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to electric wires (including wires)
The present invention relates to an electric crimping tool for crimping a crimping terminal (including a connector, a sleeve, etc.) to a terminal such as a terminal.

0002

2. Description of the Related Art Conventionally, as shown in a perspective view in FIG.
A manual crimping tool is generally known as a tool for crushing the cylindrical portion 1a and crimping the terminal 1 to the conducting wire 2a. According to this manual type, the crimping work is time-consuming and labor-intensive, so it is not suitable for large-volume crimping work. Therefore, pneumatic and hydraulic automatic crimping tools have been developed in recent years.

0003

However, the pneumatic or hydraulic automatic crimping tools require equipment related to pneumatic or hydraulic circuits, are heavy and inconvenient to handle, and have problems in operability. In addition, with conventional automatic crimping tools, when the wire and crimp terminal are set in the crimping die,
The clamping operation of the crimping die is started by the activation operation of the operating member, and the process continues until the crimping terminal is temporarily clamped, crimped, and released. As a result, the position of the crimp terminal with respect to the crimp die may shift, or the position of the crimp terminal and the electric wire may shift, resulting in poor crimping of the crimp terminal and the problem that proper crimping cannot be achieved. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its purpose is to be lightweight, easy to handle, have good operability, and to be able to properly crimp crimp terminals. The purpose of the present invention is to provide an electric crimping tool.

[0005]

[Means for Solving the Problems] The electric crimping tool of the present invention that solves the above-mentioned problems includes a pair of crimping dies for crimping a crimping terminal by a clamping operation, and a crimping tool that operates for a predetermined driving time in response to a starting operation of an operating member. an electric motor that performs one clamping operation on the crimp die; a temporary clamp member that operates the crimp die until the crimp terminal is temporarily clamped; and an operating member that operates the crimp die until the crimp terminal is temporarily clamped. and a locking means for preventing the activation operation.

[0006]

According to the above means, the crimp terminal can be temporarily clamped at an appropriate position by manually operating the temporary clamp member. Further, since the locking means prevents the operation member from being activated until the crimp terminal is temporarily clamped, the electric motor cannot be operated without temporarily clamping the crimp terminal. Then, after the crimp terminal is temporarily clamped, when a starting operation is performed on the operating member, the electric motor is operated for a predetermined driving time and the crimp die is
By applying two clamping operations, the crimp terminal is crimped.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 11, the electric crimping tool crushes the cylindrical portion 1a of the crimp terminal 1 inserted into the end of the conductor 2a of the electric wire 2, and crimps the terminal 1 onto the conductor 2a. It is a tool that allows you to In FIG. 7 showing an overall side view of the electric crimping tool, the housing 4 has a substantially cylindrical shape that can be held by hand. A die holder 10 including a crimping die 11 is attached to the tip of the housing 4 . Inside the housing 4, there is an electric motor 5 installed in the center thereof, a reduction gear 6 installed in front of the motor 5, and a reduction gear 6 installed in front of the reduction gear 6 to clamp the crimping die. An actuating device 7 for the electric motor 5 and a rechargeable battery 8 as a power source installed on the rear side of the electric motor 5 are housed.

In FIG. 1 showing a sectional view of the peripheral part of the crimping die, FIG. 2 showing a plan view thereof, and FIG. 3 showing a bottom view thereof, the crimping dies 11 provided in the die holder 10 are a pair of upper and lower parts. , each crimping die 11 is attached to the die holder 10 via a support shaft 12 located approximately at the center thereof so as to be rotatable in opening and closing. At the tips of both crimping dies 11, three types of crimping working portions 13 having a pair of depressions and protrusions are provided with different sizes. Further, at the rear end portions of both crimping dies 11, actuating pieces 1 are bent in opposite directions.
4 are formed respectively. The opposing tip surfaces of both actuating pieces 14 are flat surfaces that are parallel to each other. Figure 1
In this case, both the crimping dies 11 are always urged in the direction to open the crimping portion 13 by a return spring 15 suspended between them. Further, an interlocking pin 16 for interlocking the closing and opening operations of both crimping dies 11 is engaged across both crimping dies 11.

[0009] The speed reduction device 6 also includes the electric motor 5.
The output shaft 18, which outputs the reduced rotational force, protrudes forward. The distal end of the output shaft 18 is rotatably supported via a bearing 19 within a cylindrical distal end portion fitted into the die holder 10 of the housing 4 . The output shaft 18 includes:
A crank 20 having a shaft 21 at each end is provided at a position corresponding to between the actuating pieces 14. A rolling roller 22 is rotatably supported on each shaft 21 . A portion of this crank 20 is shown in cross section in FIG. When the crank 20 is rotated by the clockwise rotation of the output shaft 18 (see the arrow in the figure) from the position shown in FIG. While rolling on the distal end surface of the actuating piece 14, both actuating pieces 14 are pushed open as shown in FIG. 3(c).

Next, the actuating device 7 will be explained in detail. In FIG. 1, an actuation switch 24 such as a limit switch is installed in the housing 4 between the speed reduction device 6 and the crank 20. As shown in FIG. This activation switch 24 is connected to the electric motor 5 and the rechargeable battery 8.
The electric motor 5 is incorporated in an electric circuit (not shown) including the following components, and when turned on, the electric motor 5 is driven, and when turned off, the electric motor 5 is stopped. This activation switch 24
The surrounding area is shown in an enlarged view in FIG. Note that the electric circuit includes a display lamp 25 that displays the drive of the electric motor 5 (see FIGS. 1 and 2). This indicator lamp 25 is arranged at an easily visible position on the upper surface of the housing 4.

As shown in the cross-sectional views of FIGS. 5 and 6, the actuation switch 24 is operated by a switch button by the tip of a switch lever 27 rotatably attached to the side surface of its body via a shaft 26. When the button 24a is pressed in, it is turned on (see each figure (b)), and when the button 24a is released, the button 24a returns to its original state due to the elasticity of the built-in spring and is turned off (see each figure (a)). In addition, on the operation surface side of the tip of the switch lever 27,
A leaf spring 28 is attached which acts as a buffer. Further, the switch lever 27 and the leaf spring 28 are provided with a stepped portion 29 at their tips.

As shown in FIGS. 1 and 6, a trigger 3 as an operating member is located on the bottom surface of the housing 4 on the opposite side of the actuation switch 24 with the output shaft 18 in between.
1 is provided. This trigger 31 is slidable substantially in the radial direction of the output shaft 18, and is normally biased by a spring 32 in the direction of protruding downward from the housing. Further, at the inner end of the trigger 31, a pressing lever 33 that faces the leaf spring 28 of the switch lever 27 is attached to the shaft 3.
It is rotatably attached via 4. This pressing lever 33 is always urged by a torsion spring 35 in a direction such that its tip comes into contact with the outer circumferential surface of a second cam 39, which will be described later. As shown in FIG. 6(b), the pressing lever 33 turns on the actuation switch 24 by pressing the tip of the switch lever 27 together with the leaf spring 28 as the trigger 31 is pressed.

Further, in FIG. 1, the output shaft 18 includes:
A first cam 37 is provided at a position corresponding to the switch lever 27, and a second cam 39 is provided at a position corresponding to the press lever 33. The first cam 37 is connected to the output shaft 1 as shown in FIG.
8, and the switch lever 2 is fixed on the outer circumferential surface of the switch lever 2.
The cam follower portion 27a of No. 7 is in contact with the cam follower portion 27a. Also the second
As shown in FIG. 6, the cam 39 is attached to the output shaft 18 via a pin 40 and has a pin hole 40a.
is made into a long hole and can be rotated within a predetermined rotation range. The pressing lever 3 is provided on the outer peripheral surface of the second cam 39.
3 can come into contact.

Both the first and second cams 37 and 39 are set as follows based on the relationship between the on/off state of the operation switch 24, the operation of the trigger 31, and the amount of rotation of the crank 20. In addition, in FIGS. 4 to 6, (a) in each figure shows the state before the start of crimping, and (b) shows the state immediately before the crimping die is operated.
Further, (c) shows the crimping operation state of the crimping die, and (d) shows the returning state of the crimping die. Further, in this tool, the output shaft 18 is rotated 18 clockwise (see arrow in the figure) from the position shown in (a) by the operation of the electric motor 5.
One clamping operation is completed by rotating at an angle of 0°. Before the start of crimping, the crimping action parts 13 of both crimping dies 11 are open as shown in FIGS. 1 and 7, so the actuation pieces 14 are in close positions as shown in FIG. 4(a). be. In addition, the activation switch 24 is shown in FIG.
, 6 are in the off state as shown in each (a) of
Further, the trigger 31 is in a non-operated state as shown in FIG. 6(a). In this state, when the trigger 31 is pushed against the elasticity of the sling 32, the pressing lever 33
By pressing the tip of the switch lever 27 via the leaf spring 28, the operating switch 24 is turned on, and as shown in FIG.
The output shaft 18 of the reduction gear device 6 is rotated by the drive of the electric motor 5 shown in FIG. Note that when the trigger 31 is pressed, the second cam 39 is rotated by the pressing lever 33 as shown in FIG. 6(b). At this time, the second cam 39 is such that the output shaft 18 is
), it idles relative to the output shaft 18 due to the pin hole 40a through which the pin 40 is inserted.

When the output shaft 18 rotates and the crank 20 becomes approximately horizontal as shown in FIG.
It collides with the tip surface of 4. Further, as shown in FIG. 6(b), the pin 40 on the output shaft 18 begins to cause the second cam 39 to follow the rotation. Further, as the crank 20 rotates together with the output shaft 18, the rolling roller 22 rolls on the tip surfaces of the actuating pieces 14 of both the crimping dies 11 and moves both the actuating pieces 14 to the return spring 15 shown in FIG. It is pushed open as shown in FIG. 4(c) against the elasticity of. As a result, the crimping action portion 13a of the crimping die 11 is closed, as shown in the side view in FIG. Further, as the output shaft 18 rotates, the switch lever 27 is maintained in the ON state by the first cam 37 as shown in FIG. Even if the pushing force on the motor 31 is released, the electric motor 5 will not stop during the predetermined driving time.

As shown in FIG. 5(d), the output shaft 18 is rotated by the electric motor 5 for about 18 seconds from the start of rotation.
Immediately after the switch lever 27 is rotated to 0°, as shown in FIG. 5(a), the maintenance of the on state by the first cam 37 of the switch lever 27 is released, so the switch lever 27 returns to its current state and the operating switch is turned off. 24 is turned off, and as a result, the electric motor 5 is stopped. Furthermore, by the time the switch lever 27 is released from being kept in the on state by the first cam 37, the pressing lever 33 is pushed against the elasticity of the torsion spring 35 by the second cam 39, as shown in FIG. 6(d). is pushed up, and in that state the activation switch 24
This is maintained until immediately after the switch lever 27 is turned off, so that when the switch lever 27 is turned off with the trigger 31 being pushed in, the pressing lever 33 will rise above the leaf spring 28 and the tip step portion 29 of the switch lever 27. , trigger 3
Switch lever 2 that occurs when 1 remains pushed in
7 is avoided, and the activation switch 24 is prevented from remaining in the on state. Thereafter, when the pressing force on the trigger 31 is released, the trigger 31 returns to its original state due to the elasticity of the spring 32, as shown in FIG. 6(a). Accordingly, the push lever 33 is released from being pushed up by the second cam 39 and returns to its original state.

Further, as shown in FIGS. 1 and 7, approximately U-shaped temporary clamp members 42 are rotatably attached to both ends of the support shaft 12 of the lower crimping die 11. ing. Connecting holes 42 at both ends of temporary clamp member 42
In a, a connecting shaft 44 fixed to the upper crimping die 11 is shown.
Both ends of are inserted. The temporary clamp member 42 has an operating lever 4 extending below the trigger 31 at its lower part.
It has 3. The operating lever 43 has the trigger 31
An opening hole 4 larger than the trigger 31 at a position corresponding to
3a is opened (see Figure 3). This control lever 4
By pulling 3, the upper and lower crimping dies 11 are closed against the return spring 15 to the temporary clamp position. This closing amount is set to such an extent that the crimp terminal 1 is slightly clamped, as shown in the side view in FIG. Further, in the temporary clamp state, when the pulling operation of the operating lever 43 is released, both crimping dies 11 are moved to the return spring 15.
Since it is opened by , the crimp terminal 1 can be reclamped. The connecting hole 42a is a long hole to allow movement of the connecting shaft 44 in conjunction with the crimping operation of the upper crimping die 11 after temporary clamping (FIG. 9).
reference).

Further, in FIGS. 1 and 10, the crimp terminal 1
A locking means 46 is provided near the trigger 31 to prevent activation of the trigger 31 until the trigger 31 is temporarily clamped.
is provided. The locking means 46 is constructed as described below. A lock lever 47 is rotatably supported in the housing 4 adjacent to the trigger 31. The lock lever 47 includes a lock piece 47a that engages with the protrusion 31a provided on the trigger 31 to prevent it from being pushed in, and an interlocking piece 47b on the opposite side. Further, the lock lever 47 is always biased by a spring 48 shown in FIG. 5 in a direction in which the lock piece 47a protrudes toward the trigger 31 (see FIG. 10). Further, the lock pin 49 that abuts the tip of the interlocking piece 47b is attached to the housing 4 with the other end protruding outside the housing 4.
It is slidably installed. Therefore, when the operating lever 43 is pulled into the temporarily clamped state as shown in FIG. The protrusion 31a of the trigger 31
The lock piece 47a is disengaged from the lock piece 47a. Therefore, the trigger 31 can be activated by pushing it in as shown by the two-dot chain line from the state shown by the solid line in FIG. 10(b).

An example of crimping the crimp terminal 1 using the electric crimping tool described above will be described. First, in the state shown in FIG. 7, hold the housing 4 with your right hand and place your index finger, middle finger, etc. on the operating lever 43 of the temporary clamp member 42. Hold the crimp terminal 1 shown in FIG. 11 with your left hand and position it on the corresponding crimp action portion 13 of both crimp dies 11. Then, the operating lever 4 of the temporary clamp member 42
Pull the number 3 as if you were grasping it. Then, both crimping dies 11
As shown in FIG. 8, the crimp terminal 1 is temporarily clamped by being closed to the temporary clamping position. In this temporarily clamped state, if the crimp terminal 1
Temporary clamping can be done again so that the crimping position is correct. Furthermore, by pulling the operating lever 43 in conjunction with the temporary clamping, the trigger 31 is unlocked by the locking means 46 (see FIG. 10(b)). Therefore, a starting operation such as pushing the trigger 31 cannot be performed without performing the temporary clamping, that is, the electric motor 5 cannot be operated.

Next, after fitting the end of the conductor 2a of the electric wire 2 into the cylindrical portion 1a of the temporarily clamped crimp terminal 1, when the trigger 31 is pushed in with the middle finger, the push lever 33 of the trigger 31 causes the switch to be pressed. The activation switch 24 is turned on via the lever 27. As a result, the electric motor 5 is activated and the output shaft 18 is rotated, and as the electric roller 22 of the crank 20 rolls on the tip surface of the actuating piece 14 of the crimping die 11, the die 11 is pushed out. in,
The crimping action portions 13 of both crimping dies 11 are closed, thereby crimping the crimp terminal 1. This state is shown in side view in FIG. Thereafter, when the operation switch 24 is turned off, the rotation of the output shaft 18 is stopped, and both crimping dies 11 are opened by the elasticity of the return spring 15 and returned to the temporary clamping position. When the trigger 31 is released from being pressed, the trigger 31 returns to its original state due to the elasticity of the spring 32. Further, when the temporary clamp member 42 is released from being pulled against the operating lever 43, both crimping dies 11 are returned to their original states from the temporary clamp position by the elasticity of the return spring 15. With the above steps, one clamping operation for crimping the crimp terminal 1 is completed.

According to the electric crimping tool, the electric motor 5
Since the drive source is the drive source, it is lighter, easier to handle, and has better operability than the conventional drive source that uses pneumatic or hydraulic pressure. Furthermore, before the crimp terminal 1 is crimped by the operation of the electric motor 5, the crimp terminal 1 is temporarily clamped at an appropriate position by manual operation of the temporary clamping member 42, so that if the crimp terminal 1 is not properly clamped, it is possible to redo the temporary clamping. Therefore, the crimp terminal 1 can be properly crimped. Note that the present invention is not limited to the above-mentioned embodiments, and modifications can be made without departing from the gist of the present invention.

[0022]

[Effects of the Invention] Since the present invention uses an electric motor as the drive source, it is lighter, easier to handle, and has better operability than conventional devices that use pneumatic or hydraulic pressure as the drive source. can get. In addition, before the crimp terminal is crimped by the operation of the electric motor, the crimp terminal is temporarily clamped in the proper position by manual operation of the temporary clamp member, so if the crimp terminal is not properly clamped, the temporary clamp can be re-clamped.
It is possible to properly crimp the crimp terminal.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of the tip of an electric crimping tool.

FIG. 2 is a plan view of the same.

FIG. 3 is a bottom view of the same.

FIG. 4 is a sectional view illustrating the operation of the crank.

FIG. 5 is a sectional view illustrating the operation of the first cam.

FIG. 6 is a sectional view illustrating the operation of the second cam.

FIG. 7 is an overall side view of the electric crimping tool.

FIG. 8 is a side view showing a temporary clamp state.

FIG. 9 is a side view showing a crimped state.

FIG. 10 is a partial sectional view illustrating a locking means.

FIG. 11 is a perspective view of a crimp terminal.

[Explanation of symbols]

5 Electric motor 11 Crimping die 31 Trigger (operation member) 42 Temporary clamp member 46 Locking means

Claims (1)

[Claims] 1. A pair of crimping dies for crimping a crimping terminal by a clamping operation; an electric motor that operates for a predetermined driving time in response to a starting operation of an operating member and giving one clamping operation to the crimping dies; An electric crimping tool comprising: a temporary clamping member that operates the crimping die until the crimp terminal is temporarily clamped; and a locking means that prevents activation of the operating member until the crimp terminal is temporarily clamped. .