JP2974861B2 - Cordless electric small crimping machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless electric crimping machine for crimping a crimp terminal by inserting the end of a conductor into the crimp terminal, and more particularly to an insulation coat such as vinyl at the end of a wire. (Insulated wire)
The present invention relates to a cordless electric compact crimping machine having a cutter and a crimping head that can be connected to a crimping terminal.

[0002]

2. Description of the Related Art In electrical construction work, as shown in FIG. 4, when a crimp terminal W2 is connected to an electric wire W1, the connection work is usually performed using a small manual crimping machine. In recent years, a small electric crimping machine has been used because the efficiency is not improved. When the crimp terminal W2 is connected to the electric wire W1, as shown in FIGS. 5A and 5B, the conductor W1
The insulating coat (often made of vinyl resin) covering the surface must be removed. In such a case, conventionally, a semicircle having a diameter slightly smaller than the diameter of the wire is formed above and below the blade of the nipper, and the work of pulling and removing the wire here is performed. A small crimping machine and auxiliary tools such as nippers are required. In the case of an electric power tool such as an electric small crimping machine, when operating the main switch lever, the safety switch lever may be operated before the main switch lever is operated. Such a switch mechanism is a two-handed type in which the handle with the main switch lever of the power tool is operated with the left hand when the right hand is held, for example, or both the main switch lever and the safety switch lever are operated with one hand. Or one-handed operation.

[0003]

When a crimp terminal is crushed and connected to an electric wire, the end of the insulating coat covering the surface of the conductive wire is cut and removed each time using a nipper, and then the electric wire is electrically driven. Using a small crimping machine is cumbersome and inefficient. In particular, it is not only troublesome to carry and move both the crimping machine and the nipper in the electrical installation work, but also inconvenient if the nipper is not left or left. Further, it is inconvenient to operate the drive device by simply touching the main switch lever with the hand or to operate the main switch lever or the safety switch lever with both hands, because it is a safety problem and is inconvenient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. When a crimp terminal is connected to an electric wire to the crimp terminal, another terminal such as a nipper for cutting and removing an end of an insulating coat is used. It is an object of the present invention to provide a cordless electric compact crimping machine which does not require an auxiliary tool, and which allows one-handed operation of cutting an insulation coat and operating a safety switch lever and a main switch lever.

[0005]

That is, in order to solve the above-mentioned problems, the present invention provides a cordless electric small-sized crimping machine comprising a case (1), a motor (2) and a cam mechanism ( Formed by a front case (1A) in which the drive mechanism (3) provided with 4) and the tool head (9) are housed and arranged, and a rear case (1B) which becomes a gripping part and houses the battery (5). And the front case
A main switch lever (6) is arranged between the rear case (1A) and the rear case (1B), and a safety switch lever (7) and the tool head (9) are provided on the rear case (1). ) And a hammer lever (8) for moving the tool (91).
It is arranged to return to the original position by the biasing force of each spring,
Further, a semicircular blade (18a, 19a, 18b, 18b) is provided between the hammer lever (8) and the rear case (1B).
The cutter (16, 17) formed with 19b) is provided.

[0006]

The operation when the cordless electric small crimping machine is used as the above means will be described with reference to the attached drawings. First,
When connecting the electric wire to the crimp terminal, the semicircular blade 18b or 19 of the cutter 16 fixed to the upper part of the rear case 1B.
b. The length of the insulation coat required for cutting the end of the electric wire is put out. Then, the hammer lever 8 is pushed in the direction of the arrow with, for example, the thumb of the right hand, and the semicircular blade portion 18a or 19a of the cutter 17 fixed to the hammer lever 8 is positioned on the lower side as shown by a two-dot chain line. By pulling with the left hand in a state where it is pressed against the semicircular blade portion 18b or 19b of the cutter 16, only the insulating coat portion of the electric wire is removed. The end of the conductive wire from which the insulation coat has been removed is fitted into the crimp terminal, the hammer lever 8 is pulled again with the thumb and placed on the crimp head 9, and then the main switch 6 is operated to operate the motor 2 or the like. If the crimping head 9 is operated to perform crimping, the crimping operation of the electric wire can be performed easily and smoothly. Also, in the above operation process, when removing the insulation coat at the end of the electric wire, since the hammer lever 8 is operated with the thumb, the vicinity of the base of the thumb and the forefinger should be brought into contact with the safety switch lever 7. And the microswitch 12 is not turned on. That is, when the electric wire is crushed and connected to the crimp terminal, the rear case 1B is grasped by hand and the index finger is applied to the main switch 6, so that the safety switch 7 is provided near the base between the thumb and the index finger. This means that the micro switch 12 must be turned ON before the main switch 6 is pressed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing the configuration of a drive mechanism and a switch mechanism of a cordless electric compact crimping machine according to the present invention. The case of this cordless electric small crimping machine
The case 1 is formed by a front case 1A and a rear case 1B. The front case 1A includes a motor 2, a planetary gear transmission 3, a cam mechanism 4, and a tool head (crimp). The head case 9 is accommodated, and the battery 5 is accommodated in the rear case 1B. The rear case 1B also serves as a handle. The case
In the upper part of the handle portion of the case 1 (that is, the rear case 1B),
Main switch lever 6 for driving the motor 2
, A safety switch lever 7 and a hammer lever 8. In the case 1, two micro switches 11 and 12 are arranged, and a circuit in which the motor 2 rotates only when these micro switches 11 and 12 are simultaneously turned "ON". There is.

The main switch lever 6 includes a case 1
And a spring (not shown) acts to return to the original position when the finger is released. The main switch lever 6 is operated by an index finger and the micro switch 11 is operated.
Is turned ON and OFF. The safety switch 7 includes a case 1
Is pivotally mounted about the pin 1b provided as a fulcrum, and the urging force of the spring 10 acts to return to the original position when the hand is released. The safety switch 7 turns on the microswitch 12 when the palm of the base between the thumb and the forefinger contacts, and turns off when the microswitch 12 is released. The hammer lever 8 is rotatably mounted on a case 1, in particular, a pin 1b provided on an upper portion of the rear case 1B. This hammer lever-8
Is normally operated with the thumb, but the hammer lever 8 drives the movable lever 13 back and forth via the pin 15 as described below.

FIG. 2 is a plan view of the movable lever 13. The moving lever will be described with reference to FIG.
A spring 14 having one end fixed to a pin 1d fixed to the case 1 and the other end locked to a long hole 13b of the movable lever 13 is attached to the movable lever 13. A hole 15c is bored at the end of the pin, into which a pin 15 is fitted. That is, the hammer lever 8 drives a moving rod 91 described later via the moving lever 13 backward (toward the hammer lever 8) against the urging force of the spring 14. Reference numeral 20 denotes a roller.

FIG. 3 is an enlarged view of the upper part of the rear case 1B and the hammer lever 8 portion. As shown in this figure, a cutter 16 having semicircular blade portions 18a and 19a having different diameters is fixed on the upper portion of the rear case 1B, and a half-diameter having a different diameter is also provided on the hammer lever 8. Circular blade 1
The cutter 17 formed with 8b and 19b is fixed.
These cutters 16 and 17 are formed with circular small holes 18 and 19 having different diameters by pressing the hammer lever 8 with the thumb as shown by the two-dot chain line. These small holes 1
Numerals 8 and 19 are small holes for fitting the electric wires when cutting the ends of the insulating coat of the electric wires. In the embodiment of FIG. 3, two small holes are provided, but one may be provided or may be further increased.

Returning to FIG. 1, the planetary gear transmission mechanism 3 is configured to hold a fourth stage planetary gear via a planetary gear 32 from a sun gear 31 fitted to a drive shaft 21 of the motor 2. The rotational force is transmitted to the plate 34 at a reduced speed. The fourth stage planetary holding plate 34 is spline-fitted to the rotating shaft 41 of the cam mechanism 4.

The cam mechanism 4 comprises a rotary shaft 42 following the rotary shaft 41 and an eccentric shaft 43.
The moving rod 91 is moved back and forth (or pushed) by the rotating motion (i.e., eccentric motion) as described later, and the crimping terminal 9 is crushed by the crimping head 9.

Next, the crimping head 9 includes a moving rod 9
1 and a fixed die 92 as a tool fixedly installed in the housing 90 and a movable die 93 fixed to the movable rod 91 and integrally moved. The fixed die 9
2, a concave portion for placing a terminal to be crimped or an end of a conductive wire is formed, and a convex portion is formed on the moving die 93 side for closely fitting the concave portion. As described above, the moving rod 91 and the moving die 93 are driven (moved) by the cam mechanism 4. The distal end 13a of the moving lever 13 is fitted and locked in a groove 91a formed in the moving rod 91 (see FIG. 1).

The structure of the drive mechanism, crimping head, switch mechanism and the like of the cordless electric compact crimping machine of the present invention is as described above. Next, the operation thereof will be described with reference to the accompanying drawings (mainly FIGS. 1 and 3). Will be explained. First, when an electric wire is connected to a crimp terminal, a semi-circular blade portion 18b or 19b of a cutter 16 fixed to an upper portion of a rear case 1B has an insulating coat necessary for cutting an end of the electric wire. Put the length out and put it on.
Then, the hammer lever 8 is pushed in the direction of the arrow with, for example, the thumb of the right hand, and the semicircular blade portion 18a or 19a of the cutter 17 fixed to the hammer lever 8 is positioned on the lower side as shown by a two-dot chain line. By pulling with the left hand in a state where it is pressed against the semicircular blade portion 18b or 19b of the cutter 16, only the insulating coat portion of the electric wire is removed. The end of the conductive wire from which the insulation coat has been removed is fitted into the crimp terminal, the hammer lever 8 is pulled again with the thumb and placed on the crimp head 9, and then the main switch 6 is operated to operate the motor 2 or the like. If the crimping head 9 is operated to perform crimping, the crimping operation of the electric wire can be performed easily and smoothly.

Also, in the above operation process, when removing the insulation coat at the end of the electric wire, the hammer lever 8 is operated by the thumb, so that the vicinity of the base between the thumb and the index finger is applied to the safety switch lever 7. Micro switch 1 without contact
2 is never turned on. That is, when the electric wire is crushed and connected to the crimp terminal, the rear case 1B is grasped by hand and the index finger is applied to the main switch 6, so that the safety switch 7 is provided near the base between the thumb and the index finger. This means that the micro switch 12 must be turned ON before the main switch 6 is pressed. Thus, the micro switches 11 and 12 are simultaneously turned on, and the motor 2
And the crimping terminal can be crushed and connected to the electric wire by the crimping head 9 by operating the planetary gear mechanism 3 and the like, so that the crimping operation can be performed safely. .

In the embodiment of the present invention, the safe operation and the removal of the coating of the electric wire have been described with the switch mechanism of the cordless electric small crimping machine.
In order to remove insulating coats such as a coat, cutters 16 and 17 are provided on other power tools as well on the hammer lever and the case, and the arrangement of the main switch and the safety switch is also the same. Can be placed. Before operating the main switch, the safety switch can always be operated to prevent malfunction. Further, the cutters 16 and 17 provided on the hammer lever 8 and the case 1 can be used for mere cutting, and the cutter without the semicircular blade portions 18a and 18b or other cutters can be used. May be attached.

[0017]

As described above in detail, according to the cordless electric compact crimping machine of the present invention, the insulation coat of the electric wire is removed and connected to the crimp terminal without using other tools such as nipper. I can do it. Therefore, the need for a nipper is eliminated, and the trouble in the electrical installation work and the like is eliminated, and the work efficiency can be remarkably improved. According to the cordless electric compact crimping machine of the present invention, not only the cutting operation of the insulation coat, the operation of the main switch lever and the safety switch lever can be operated with one hand, but also a tool such as a crimping head. When operating the drive mechanism of the head unit, there is no need to operate the safety switch lever and then press the main switch lever, so that the operation order of the switch lever is not mistaken.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a configuration of a drive mechanism and a switch mechanism of a cordless electric compact crimping machine of the present invention.

FIG. 2 is a plan view of a moving lever portion which constitutes the cordless electric compact crimping machine of the present invention and is driven by a hammer lever.

FIG. 3 is an enlarged view of a rear case and a hammer lever portion constituting the cordless electric compact crimping machine of the present invention. This

FIG. 4 is a perspective view of an electric wire and a crimp terminal connected by the cordless electric compact crimping machine of the present invention.

FIG. 5A is a plan view showing an end of an electric wire,
FIG. 5B is a plan view showing a state in which the insulating coat at the end of the electric wire is cut and removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Motor 3 Planetary gear transmission mechanism 4 Cam mechanism 6 Main switch lever 7 Safety switch lever 8 Hammer lever 9 Crimping head 11, 12 Micro switch 13 Moving lever 14 Spring 16, 17 Cutter 18, 19 Small hole 18a, 18b Semi-circular blade 19a, 19b Semi-circular blade

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-171779 (JP, A) JP-A 55-53915 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B25B 25/00-29/02 B25B 33/00 B25B 1/00-11/02

Claims (1)

(57) [Claims] A case is formed by a front case housing a drive mechanism having a motor and a cam mechanism and a tool head, and a rear case housing a battery and serving as a gripping part. A main switch lever is disposed between the front case and the rear case, and a safety switch lever and a hammer lever for moving the tool of the tool head are provided on the rear case. And a cutter having a semicircular blade portion provided between the hammer lever and the rear case, respectively. Cordless electric small crimping machine.