JPH03814Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention mainly involves inserting a plurality of bare conductor portions from which the end coating of a covered electric wire has been peeled off and crimping them into the sleeve of a sleeve-type crimp terminal. It is used to twist and bundle multiple bare conductor wires before electrically and physically connecting them, and also to solder, braze, weld, and screw together multiple bare conductor wires. It is used to twist and bind parts and elements of various electrical equipment when connecting them by fastening, wrapping, etc. Or, an arm that is swingable around an axis perpendicular or substantially perpendicular to the rotational axis of the drive rotation member is provided at a plurality of locations spaced apart at approximately equal intervals, the tip of which is greater than the front end surface of the drive rotation member. The arms are pivoted so as to protrude forward, and each wire clamping piece is connected to the protruding tip of each arm, and each wire clamping piece is connected to the opposite end by rotating centrifugal force. The heavy spigots that swing the arms in a direction in which they come into contact with each other or come very close to each other are arranged in series, and a part of the tip of the drive rotating member gets in, making it uncertain that the desired twisting and bundling will occur, resulting in many uncertainties. Generating quality products;
In addition, when a part of the tip of the wire is stuck in, each arm swings against the spring due to rotational centrifugal force, and the tip of the wire gets strongly bitten by the compressed spring or becomes entangled. The problem is that when the wire is pulled out after twisting, the spring comes out together with the wire.

(Means for Solving the Problems) The purpose of the present invention is to solve the above-mentioned problems of the above-mentioned prior-application machine that utilizes rotational centrifugal force through extremely simple structural improvements. In order to achieve this object, the electric wire twisting machine according to the present invention is the electric wire twisting machine of the earlier application having the configuration described in detail at the beginning. The structure is characterized in that a cover is provided at a portion to cover the front surface of each of the springs without inhibiting the swinging of each of the arms.

(Function) According to the electric wire twisting machine according to the present invention having the above-mentioned configuration, when the rotation of the drive rotating member is stopped, the biasing force of the spring causes the arms to be moved so that the wire clamping pieces at the tips of the arms are moved to positions separated from each other. Since the wire insertion opening is swung to ensure that the wire insertion opening is opened, the bare conductor portion of the wire to be twisted and bundled can be inserted smoothly into the opening through the insertion guide opening of the cylindrical cap. It will be inserted to a predetermined depth. At this time, since the front surface of the spring is covered with the cover, part of the bare conductive wire portion is reliably prevented from entering into the spring. When the drive rotation member is driven and rotated in this inserted state, each arm swings toward the rotation extension axis side due to the centrifugal force of the rotation so that the wire clamping pieces at the tips of the arms are in contact with each other or come very close to each other. The vicinity of the proximal end portions of the plurality of bare conductor portions inserted and held as shown in FIG. By pulling out and moving the plurality of wires in the opposite direction to the above-mentioned insertion direction in this sandwiched state, it is possible to apply twisting force to the plurality of bare conductor portions and twist and bind them. be.

(Example) An example of the present invention will be described below in detail based on the drawings.

In FIGS. 1 to 7, reference numeral 1 denotes a drive rotor that is rotatably supported via a bearing 10 that is fitted into a bottomed cylindrical holder 15 that is fitted into the tip of a cylindrical grip cover 8. This shaft is an example of a rotational drive source, and is directly connected to and interlocked with the air motor 6 built into the base end of the grip cover 8. The grip cover 8 has an outer diameter of about 30 mm and can be firmly gripped with one hand. It is constructed so that it can be held. 11
is an arm holder which is an example of a drive rotating member configured to be fixedly connected concentrically to the tip of the rotating shaft 1 via a bearing 16 and a lock bolt 12 so as to be able to rotate integrally with the rotating shaft 1. There are annular members 11A and 11B having different wall thickness near the tip in the direction of the cylinder axis and at a position a suitable distance behind the tip.
are integrally connected, and at a central angle in the rotation circumferential direction on the peripheral walls of both annular members 11A and 11B.
Notches 11a and 11b each having a substantially angular U shape when viewed from the front (as viewed in the direction of the rotational axis) are formed at three locations equally spaced by 120 degrees. Reference numeral 2 denotes three arms arranged at equal intervals in the circumferential direction of the rotation so as to be inserted and held in each notch 11a on the distal end side of the holder 11. Each of these notches 1 has a length that protrudes relatively longer in the axial extension direction of the rotating shaft 1 than the tip edge, and has a proximal end portion fitted into the notch 11a.
1a, each arm 2 is pivotally supported via a pin 13 having an axis substantially orthogonal to the axis of the rotating shaft 1, which is inserted into and held by the annular member 11A so as to cross the axis of rotation. It is configured to be swingable around the axis of the pin 13. To explain the detailed structure of each of the arms 2, as clearly shown in FIGS. 6 and 7, the axis of the rotating shaft 1 is formed on the base end side by the centrifugal force of the rotating shaft 1. A heavy flange portion 3 that moves away from the arm 2 and swings the tip of each arm 2 toward the extension axis is integrally connected in a straight line in a direction opposite to the tip of the arm 2. The heavy flange portion 3 is fitted and held in the rear end side notch 11b, and the distal end portion of each arm 2 has a
They contact each other during the swinging movement toward the extension axis due to the rotational centrifugal force, and are normally located between the vicinity of the base end of each arm 2 and the peripheral surface of the distal end of the holder 11 (when rotation is stopped). A wire clamping piece 5 is provided in series to close the stranded wire insertion opening 4, which is biased and maintained in the open state as shown in FIG. 5A, through an intervening spring 14, as shown in FIG. 5B. There is. This type of structure is constructed by cutting a material such as carbon tool steel into a series that is generally linear as a whole. Further, each of the wire clamping pieces 5 has a relatively wide rectangular plate shape along the swing axis direction of the arm 2,
In addition, in the width direction, it is configured to have an inclined position such that one end approaches the swing axis. Reference numeral 9 designates a threaded portion 17 at the tip of the grip cover 8 so as to accommodate the holder 11 and the second group of arms.
It is a cylindrical cap that is detachably connected via a cylindrical cap, and the tip wall 9W of this cylindrical cap 9 has
A tapered electric wire insertion guide port 9A is formed concentrically with the opening 4 and has a diameter that gradually becomes smaller toward the side closer to the opening 4.

In the wire twisting machine configured as described above, a cover 22 made of a disc-shaped member is screwed and fixed to the tip end surface of the arm holder 11. As clearly shown in FIGS. 3A and 6B and FIGS. 6A and 6B, this disk-shaped cover 22 is formed at the outer diameter D when each of the arms 2 swings to the maximum in the line clamping direction. The diameter is equal to or slightly smaller than the diameter Do of the inscribed circle of the arm 22 portion outside position 22, and is configured so as not to impede the swinging of each arm 2, and its front surface is The stopper is configured to limit the insertion of electric wires. In the figure, reference numeral 20 denotes a sludge removal hole formed in the peripheral wall of the cap 9, and 7 is an operation lever for rotating and stopping the rotation of the air motor 6, which is pivotally mounted to the cylindrical grip cover 8 provided inside. ing. 21 is a rotation controller for the air motor 6.

The electric wire twisting machine configured as a hand-held type as described above is used by an operator who grasps the grip cover 8 with one hand, grasps the covering part a of the electric wire A with the other hand, and twists the bare conductor parts b of the plurality of ends. After inserting into the opening 4 through the central guiding action of the tip insertion guide port 9A of the cylindrical cap 9, the lever 7 is operated to operate the air motor 6 to drive and rotate the rotating shaft 1 and the holder 11. This allows the twisting operation to be performed as explained in the section on the above-mentioned operation.

Other examples will be listed below.

[] FIG. 8 shows a configuration in which an electric motor 6 is used instead of an air motor as the rotational drive source for the rotary shaft 1, and the electric wires are inserted into the cylindrical cap 9 facing the electric wire group insertion guide opening 9A. Reflective photoelectric sensor 18 that detects insertion of a group
A controller 19 with a built-in timer is attached to the grip cover 8 to automatically keep the electric motor 6 in operation for a set period of time based on the detection operation of the sensor 18, which eliminates the need for manual switch operation and is more efficient. Can perform twisting work.

[] The entire machine may be configured as a hand-held type as in the above embodiment, or it may be configured as a stationary type that is fixedly installed on a workbench or floor.

[] FIGS. 9A and 9B show modified examples of the cover 22, in which a circular 3.
The equally divided plate covers 22A are arranged and fixed in an overlapping posture in the direction of the rotation axis so that they slide into contact with each other as each arm 2 swings, and these three plate covers 22A form one cover. 22, and in this case, the front surface of the spring 14 can be reliably covered.

[] FIG. 10 also shows a modification of the cover 22, in which the outer diameter D of the disc-shaped cover 22 screwed and fixed to the distal end surface of the arm holder 11 is determined when the three springs 14 are in an uncompressed state. The diameter is equal to or slightly larger than the diameter of the circumscribed circle of these springs 14 (when rotation is stopped). In this case, the front surface of the spring 14 is completely covered to ensure that a part of the conductor part enters the spring 14. It is preventable.

(Effect of the invention) As is already clear from the detailed explanation above,
Spring 14 is interposed between the circumferential surface of the distal end of the drive rotating member 11 and the plurality of arms 2 located opposite thereto so as to position the wire clamping pieces 5 apart from each other when the rotation is stopped. Since the front surface can be covered with the cover 22,
When the bare conductor part is inserted into the cylindrical cap 9 from the front, a part of the bare conductor part is inserted into the spring 1.
This makes it possible to reliably prevent the wire from entering between the windings of No. 4. Therefore, not only can all the inserted bare conductor parts be reliably twisted and bundled, and the occurrence of defective products can be minimized, but also the spring 14 may be accidentally pulled out when the wire is pulled out after the twisting action, and the twisting machine This prevents the original function from being impaired and ensures that normal and reliable function is always maintained even during continuous use.

[Brief explanation of the drawing]

1 to 7 show an embodiment of the present invention,
Figures 1 and 2 are partially cutaway perspective views, Figures 3A and 2B are enlarged longitudinal sectional front views of the main parts, Figure 4 is a partially cutaway side view of the whole, and Figures 5A and 5B are Figures 1 and 2 are enlarged vertical sectional front views of the main parts, Figures 6A, 7B and 7 are enlarged side views and plan views of the components, and Figures 8 to 10 are separate. FIG. 8 is a partially cutaway side view of the whole, FIGS. 9A and 9B are enlarged longitudinal sectional front views of the main parts, and FIG. 10 is an enlarged longitudinal sectional side view of the main parts. 2 is an arm, 5 is a wire clamping piece, 6 is a motor, 9 is a cylindrical cap, 11 is a drive rotating member, 14 is a spring, and 22 is a cover.

Claims (1)

[Claims for Utility Model Registration] A plurality of locations on the circumferential portion of the drive rotation member 11 that are spaced at equal or approximately equal intervals in the rotation circumferential direction are orthogonal or approximately perpendicular to the rotation axis of the drive rotation member 11. An arm 2 that is swingable around its axis is pivotally supported such that its tip protrudes forward from the tip end surface of the drive rotating member 11, and a wire clamping piece is attached to the protruding tip of each arm 2. 5 are connected in series, and at the opposite end, a heavy pedestal part 3 is connected to the opposite end for swinging each arm 2 in a direction in which the wire clamping pieces 5 come into contact with each other or come very close to each other. and between the peripheral surface of the distal end portion of the drive rotating member 11 and the portions of the arms 2 located opposite thereto, the distal end line clamping pieces 5 of the arms 2 are spaced apart from each other when the rotation is stopped. Spring 14 that swings and biases in the positioning direction
is interposed therein, and a wire insertion guide opening 9A is formed at the tip of a cylindrical cap 9 that surrounds the two groups of arms and the five groups of wire clamping pieces, and the tip of the drive rotating member 11 is An electric wire characterized in that a cover 22 is provided on a portion of each arm 2 at a position corresponding to the surface or the end surface thereof, and covers the front surface of each spring 14 without inhibiting the swinging of each arm 2. Twisting machine. The electric wire twisting machine according to claim 1, wherein the cover 22 is constituted by a disc-shaped member which also serves as a wire insertion restriction stopper and which is screwed and fixed to the front end surface of the drive rotating member 11. An electric wire twisting machine according to claim 1, which is entirely constructed as a hand-held type. The electric wire twisting machine according to claim 1, wherein the rotational drive source of the driving rotation member 11 is an air motor.