JP2001315069A - Tool using rotary power device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool having an attaching means easily attachable to a widely and commonly available multipurpose rotary power device and a means capable of transmitting rotation of the rotary power device as an opening and closing action of work ends by a simple structure. SOLUTION: In a terminal crimping tool provided with a conversion box 1 provided with a worm wheel 13 connecting a worm 10 to a rotary shaft 21 of the rotary power device 20 and having an opening and closing cam 15, and a pair of crimp dies 2 and 2 journalled so as to open and close and energized by a spring so as to expansively open the work ends 2a and 2a, the opening and closing cam 15 is sandwiched by a pair of links 4 and 4 existing in a rear part of the dies 2 and 2 and the dies work ends 2a and 2a open and close at an antiphase by opening and closing of the links 4 and 4 caused by a rotation of the opening and closing cam 15. It is provided with a tool rotation preventing fixture 7 abutting to a frame 24 of the rotary power device 20 and a manual narrowly closing lever 8 capable of manually closing the dies work ends 2a and 2a for temporarily fixing a terminal when the dies work ends 2a and 2a are in an opened state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power tool which can be used simply by being attached to a rotary power device which is widely and commercially available, for example, a handy type battery-powered multipurpose drill, and more particularly to a power tool for crimping a terminal to a conductor. Effective for application to terminal crimping tools.

[0002]

2. Description of the Related Art Conventionally, a terminal crimping tool using a rotary power source of this kind has been put into practical use as an electric crimping tool, but most of them are used as a transmitting means for opening and closing a pair of crimping dies. It is composed of a large number of members, and the rotary power source is complicatedly integrated with the configuration, and is a dedicated part for the crimping tool.

[0003]

However, in the conventional configuration, the transmission configuration for converting the rotation operation of the rotary power unit into the opening / closing operation is complicated, the number of assembly steps is high, and the cost is high. There was a problem that inspection was never easy.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a transmission means which can be easily connected to a versatile rotary power device which is widely and generally available on the market, and in which the rotary operation is performed to open and close the die. It is an object of the present invention to provide a simple and inexpensive tool such as a terminal crimping tool.

[0005]

SUMMARY OF THE INVENTION A tool according to the present invention is provided with a pair of crimping dies 2, 2 and the like, which are pivotally supported so as to be able to open and close, and are spring-biased so as to expand the working ends 2a. A rotary power unit 20 having an arm and being widely commercially available
When the chuck portion is removed, a worm 10 having a sufficiently standardized male screw portion and having a rotating shaft 11 connectable to the rotating shaft 21 and a cam 15 for opening and closing the die working ends 2a, 2a are formed. Worm wheel 13 with camshaft 14
A conversion box 1 having a mechanism for converting the camshaft 14 into a rotation decelerated perpendicularly to the axial direction of the rotary power unit 20 and transmitting the rotation, and a pair of dice provided at the rear of the dies 2 and 2 Are attached to the conversion box 1 with the pin shafts 3 and 3 of the dies 2 and 2 so that the links 4 and 4 always sandwich the opening / closing cam 15. Is pressed against the contact surface of the opening / closing cam 15 so that the rear portion of the die performs opening / closing operation according to the shape of the opening / closing cam 15 and opens / closes the die working ends 2a, 2a in antiphase. Things.

When the die working ends 2a, 2a are open, the die working ends 2a, 2a are opposed to the spring biasing force.
A manual closing lever 8 is provided as a manual closing tool that can close the shutter. In addition, a crimping tool rotation preventing fixture 7 that can be fixed to the gantry 24 of the rotary power unit 20 is provided because the crimping tool does not rotate in the rotation axis direction when the rotation shaft of the rotary power unit 20 is rotating.

Next, a case where the operation procedure of the tool according to the present invention is applied to a terminal crimping tool will be described. First, the terminal crimping tool and the rotary power unit 20 which are widely commercially available according to the present invention are connected to a male screw portion 21 at the end of a rotary shaft of the rotary power unit 20.
The female screw portion 18 of the worm shaft 11 that can be screwed into the worm shaft 11 is screwed into the detachable member insertion hole 19 of the worm shaft 11.
When the rotating shaft of the rotary power unit 20 rotates in the mounting direction (usually forward rotation), an insertion member (eg, a small screwdriver) is inserted into contact with the die so that the worm shaft 11 does not rotate together. In advance, the user operates the rotation direction switch 22 and the rotation switch 23 of the rotary power unit 20 to rotate the rotation shaft in the mounting direction (usually forward rotation),
When the rotation preventing tool 7 of the terminal crimping tool comes into contact with the gantry 24 of the rotary power unit 20, the switch 24 is operated so that the rotation shaft stops rotating, the insertion member is removed, and the mounting direction is again set. It can be rotated and securely attached.

Next, during the terminal crimping operation, the rotation direction of the rotating shaft of the rotary power unit 20 is always set in the mounting direction.
The opening / closing cam 15 is moved by the switch 23 to the spring 6 whose die working end 2a is attached to the die 2,2.
After rotating the opening / closing cam shaft 14 to the position of opening by the bias of the spring, the terminal is arranged between the working ends 2a, 2a of the dies, and the manual closing lever 8 is drawn to be located at the rear of the dies. By pushing down the lower link 4 against the bias of the spring 6, the lead wire is inserted into the hole of the terminal while temporarily fixing the terminal at the die working ends 2a, 2a, and rotated again by the switch 23. The links 4, 4 are further pushed and opened by the opening / closing cam 15, the die working ends 2a, 2a are strongly closed, and a terminal crimping operation is performed.

In order to detach the crimping tool according to the present invention and the rotary power unit 20 after the terminal crimping operation, the rotary shaft 21 of the rotary power unit 20 is inserted into the mounting member insertion hole 19 of the worm shaft 11. When rotating in the detaching direction (usually reverse rotation), an insertion member (for example, a small screwdriver) is inserted so as to make two contact with the die so that the worm shaft 11 does not rotate together. The operation can be performed by operating the rotation direction switch 22 and the rotation switch 23 of the rotary power unit 20 so that the shaft 21 rotates in the detaching direction (normally reverse rotation). It should be noted that since the rotary power device that is widely and generally commercially available has the male screw portion 21 that is sufficiently standardized when the chuck portion 25 is removed, it has been described above. However, the rotary power device is fitted to the worm rotary shaft instead of the female screw portion 18. If the mating pin 18a is provided, it can be directly attached to a commercially available rotary power unit.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a terminal crimping tool according to the present embodiment, which transmits the rotation of a rotary power unit 20 to an opening / closing cam 15. FIG. 2 is a side view showing a pair of crimping dies 2 pivotally supported to be openable and closable on a conversion box 1 and spring-biased so as to expand a working end. FIG. FIG. 3 is a side view showing the conversion box 1 from the opening / closing cam side 15 in a state where the opening / closing cam 15 is rotated by 45 degrees. FIG. 4 is a front view of FIG. 7 is a view showing the inside of the conversion box 1 with the case removed from the opening / closing cam side 15 and a partial cross section of the female spiral hole 18 of the worm shaft 11, FIG. 6 is a rear view as seen from the rear of the crimping die, FIG.
FIG. 3 is a side view in which the terminal crimping tool of the present embodiment and a commercially available rotary power unit 20 are screwed.

As shown in FIGS. 1, 2 and 6, the crimping dies 2, 2 are pivotally connected at their substantially middle portions by pin shafts 3, 3 so as to be openable and closable. The expanding springs 6, 6 are attached with fixing screws 16, 16 and are normally biased so that the working ends 2a, 2a of the crimping dies are expanded in a normal state, and furthermore, are freely rotatable about the axis of the main body. Further, links 4 and 4 are pivotally connected to the rear portion of the die, and a lever receiving pin 5 for manual narrowing is provided on the lower link 4 on the side where the conversion box 1 is mounted.

As shown in FIGS. 1 to 5, conversion box 1
Rotates a worm rotating shaft 11 having a female screw portion 18 that can be screwed with a male screw portion 21 at the tip of a rotating shaft of a ready-made rotating power unit 20 at both ends by worm bearings 12 and 12 at both ends of the worm rotating shaft. Worm rotating shaft 11
And a worm wheel 13 having a cam shaft 14 forming a cam 15 for opening and closing the die working ends 2a, 2a.
Is converted into a decelerated rotation perpendicular to the rotation axis direction of the rotary power unit 20 and transmitted.

As shown in FIGS. 1 and 2, the center point of a pair of links 4, 4 at the rear of the crimping dies 2, 2 and the center point of the opening / closing cam shaft 14 are arranged substantially linearly on the side. And the opening and closing cam 15 is moved by the spring
When the camshaft 14 rotates, the links 4, 4 are attached to the conversion box 1 by the fixing screws 17 at the positions of the pin shafts 3, 3 of the dies 2, 2. 15, the rear part of the die is opened and closed according to the shape of the opening and closing cam 15, and the die working ends 2a and 2a are also opened and closed in antiphase.

Next, as shown in FIGS. 1 and 2, when the die working ends 2a, 2a are in an open state, a manual closing operation capable of closing the die working ends 2a, 2a against the spring biasing force. A manual closing lever 8 is mounted on the conversion box 1 by a support shaft 9 of the lever 8 on the upper part of a manual closing lever receiving pin 5 provided on the link 4 below the dies 2 and 2 at the rear. When the trigger 8b of the lever 8 is pulled with a finger, the lever 8 is rotated by the support shaft 9 and the lever 8a moves down the lever receiving pin 5 for manual narrowing. And the links 4, 4 open apart from the opening / closing cam 15, and the die working ends 2a, 2a can also be closed in anti-phase.

As shown in FIGS. 1, 2, and 6, the female screw portion 18 for mounting the conversion box 1 and the rotary power unit 2 are provided.
Since the crimping tool does not rotate in the direction of the rotating shaft when the rotating shaft in the mounted state is screwed with the male screw portion 21 of the rotating shaft at the end of the rotating shaft 0, the crimping tool rotation preventing fixture 7 is attached to the conversion box 1. Is provided so that it can be easily fixed to the gantry 24 of the rotary power unit 20.

Next, a terminal crimping operation using the terminal crimping tool according to the present embodiment will be described. First, in order to screw the terminal crimping tool of the present invention and the rotary power device 20 with the female screw portion 18 of the worm shaft 11 that can be screwed with the male screw portion 21 at the tip of the rotary shaft of the rotary power device 20, When the rotation shaft of the rotary power unit 20 rotates in the mounting direction of the detachable member insertion hole 19 of the worm shaft 11 in the mounting direction (usually forward rotation), the insertion member (eg, , Small screwdriver)
Is inserted so as to come into contact with the die, the rotation direction changeover switch 22 of the rotary power unit 20 is switched so that the rotation shaft rotates in the mounting direction (usually forward rotation), and the rotation switch 23 is operated. When the rotation shaft is rotated, the switch 23 is operated so that the rotation shaft stops rotating when the rotation preventing tool 7 of the terminal crimping tool comes into contact with the gantry 24 of the rotary power unit 20, and the insertion member is rotated. Is removed, the switch 23 is operated again, and the switch 23 is rotated in the mounting direction to securely mount.

Next, also during the terminal crimping operation, the rotation direction changeover switch 22 of the rotary power unit 20 is switched so that the rotary shaft rotates in the mounting direction (usually normal rotation). The rotating direction of the rotating shaft is always the mounting direction, and the opening / closing cam 15 is moved by the switch 23 until the die working ends 2a, 2a are opened by the spring bias of the spring 6 attached to the dies 2, 2. After the opening and closing cam shaft 14 is rotated, the terminals are connected to the die working ends 2a, 2a.
The trigger portion 8b of the manual closing lever 8 is pulled by a finger, the lever 8 is rotated by the support shaft 9, and the action portion 8a presses the manual closing lever receiving pin 5 downward. Then, the links 4 and 4 are separated from the opening / closing cam 15 and opened, and the die working ends 2a and 2a are also closed in antiphase, and the conductor is inserted into the hole of the terminal while temporarily fixing the terminal.
The link 4 is rotated by the switch 23 and the opening / closing cam 15 is opened.
Then, the die working ends 2a, 2a are strongly closed, and a terminal crimping operation is performed.

In order to detach the crimping tool of the present invention and the rotary power unit 20 after the terminal crimping operation, the worm shaft 11
The rotation shaft 2 of the rotary power unit 20
When 1 rotates in the detaching direction (usually reverse rotation), an insertion member (eg, a small screwdriver) is inserted so as to make two contact with the die so that the worm shaft 11 does not rotate together, The rotation can be performed by operating the rotation direction changeover switch 22 and the rotation switch 23 of the rotary power unit 20 so that the rotation shaft 21 rotates in the detaching direction (normally reverse rotation). If a fitting pin 18a is provided on the worm rotating shaft 11, a commercially available rotary power unit can be chucked as shown in FIG. The structure of the conversion box at that time is shown in FIGS.

As described above, the terminal crimping tool according to the present invention has a small number of parts, has a simple structure, can be easily mounted on a commercially available rotary power unit, and temporarily fixes the terminal in advance by operating the manual closing lever. The operation can be simplified, and the terminal crimping operation is quick and easy by using the rotary power device and the manual closing lever.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the invention.

[0021]

According to the present invention, the rotary power source can be easily replaced by a general-purpose multi-purpose rotary power unit which is widely available on the market. It is inexpensive compared to tools, and also expands the use of commercially available rotary power units. Further, since the structure is simple and the attachment and detachment are easy, there is an effect that maintenance and inspection are easy.

[Brief description of the drawings]

FIG. 1 is a side view of a terminal crimping tool according to an embodiment of the present invention.

FIG. 2 is a top view of the embodiment shown in FIG. 1;

3A and 3B show a conversion box, wherein FIG. 3A is a view from the cam side, and FIGS. 3B and 3C are side views.

FIG. 4 shows the internal structure of a conversion box.

FIG. 5 is a rear view of the crimping die.

FIG. 6 shows an example in which the tool according to the present invention is mounted by removing the chuck portion of a commercially available rotary power unit.

FIGS. 7A and 7B show a case where a fitting portion of the conversion box to the rotary power unit is a fitting pin, and FIG.
(C) shows a side view thereof.

8 shows the internal structure of the conversion box shown in FIG.

FIG. 9 shows an example in which the tool according to the present invention is attached via a chuck portion of a commercially available rotary power unit.

[Explanation of symbols]

1, conversion box 2, crimping die 2a, crimping die working end 2b, crimping die rear arm 3, pin shaft 4, link at rear of crimping die 5, lever receiving pin for manual narrowing 6, spring 7 ················································································································· Worm rotating shaft 12, worm rotating bearing 13, worm wheel 14, camshaft 15, crimping die working end opening / closing cam 16, spring fixing screw 17, crimping die fixing screw 18, female screw for mounting on rotary power unit 18b, rotation Fitting pin for mounting to power unit 19 / Warm rotation stop member insertion hole for attachment / detachment to / from rotary power unit 20 / Example of commercially available rotary power unit 21 / Rotation of rotary power unit Spindle tip male thread 22 / Rotation direction switch of rotary power unit 23 / Rotation switch of rotary power unit 24 / Mounting stand of rotary power unit 25 / Chuck unit of rotary power unit

Claims (5)

[Claims] A worm wheel meshes with a worm having a joint with a rotating shaft of a rotary power unit to vertically convert and reduce the rotation direction, and a cam is provided coaxially with the worm wheel.
A tool using a rotary power unit, wherein the cam is sandwiched and spring-biased by a pair of links provided on an arm opposite to a working end which is pivotally supported so as to be openable and closable. 2. A terminal crimping tool according to claim 1, wherein the working end comprises a pair of crimping dies. 3. A rotation-preventing fixture which abuts on a gantry of the rotary power unit in order to prevent rotation of a tool when a rotation shaft of the rotary power unit rotates in a state of being connected to the rotary power unit. Item 1. The tool according to Item 1. 4. A rotation-preventing fixture which abuts on a gantry of said rotary power unit in order to prevent rotation of a tool when a rotation shaft of said rotary power unit rotates in a state of being connected to said rotary power unit. Item 2. A terminal crimping tool according to item 2. 5. The terminal crimping tool according to claim 2, further comprising a mechanism capable of manually closing the crimping die working end against the urging force of the spring when the crimping die working end is open.