JPH0317535Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The present invention mainly involves inserting and crimping a plurality of bare conductor parts from which the end coating of a covered electric wire has been peeled off into the sleeve of a sleeve-type compression terminal. It is used to burn and bind multiple bare conductor wires before electrically and physically connecting the wires.In addition, it is used to bundle multiple bare conductor wires by soldering
It is used to bind the parts and elements of various electrical devices by brazing, welding, screwing, winding, etc. when they are connected by means such as brazing, welding, screwing, winding, etc. A cylindrical member is supported at the distal end via a bearing in such a manner that the cover can rotate integrally with the driving rotation shaft of an air motor as a rotational drive source inside the cover, and the rotational circumference is supported at the periphery of the drive rotation cylindrical member. Wire clamping pieces that can swing freely in the direction of clamping multiple electric wires against the biasing force due to rotational centrifugal force are provided at multiple locations equally spaced or almost equally spaced in the direction. The present invention relates to an electric wire twisting machine in which a cylindrical cap surrounding the group of pieces and the drive rotating cylindrical member is detachably attached to the grip cover.

<Prior art and its problems> In the electric wire twisting machine having the above configuration, the above-mentioned method is used to prevent the risk of injury caused by accidentally touching the group of wire clamping pieces rotating at high speed during use. The cylindrical cap is indispensable, and what's more, the so-called dregs such as the cut ends of bare conductors generated during the twisting work accumulate inside the cylindrical cap, and if left as is. It is necessary that the grip cover be detachable from the cylindrical grip cover in order to avoid the deterioration of the desired twisting performance such as failure in the operation of the wire clamping pieces.

Furthermore, the above-mentioned scum generated inside the cylindrical cap during the twisting operation is prevented from entering between the inner race and the outer race of the bearing that supports the driving rotating cylindrical member, and the lubricating performance of this bearing is maintained. Preventing oil from leaking into the cylindrical cap is also an important matter for ensuring smooth and reliable combustion.

However, in the case of the conventionally known air motor type electric wire twisting machine and wire sheath removal machine described in Japanese Patent Publication No. 54-7348, for example, the wire twisting machine and wire sheath removal machine, which is a conventionally known air motor type electric wire twisting machine and wire sheathing removal machine, has a method for discharging relatively large pieces of sheathing to the outside of the machine. Although holes are provided, no countermeasures have been taken yet to address the above-mentioned problems caused by the fine "dust" generated by the wire twisting process or to prevent bearing oil from leaking into the cylindrical cap. Generally speaking, there is no such thing. In this way, conventional systems do not have interconnected configurations in terms of maintainability and smooth operation, and therefore require a large number of components to meet each of the above requirements. However, the structure is complicated and may require a lot of effort to assemble, and the required diameter of the cylindrical cap is large, making it difficult to handle.

<Means for Solving the Problems> In the present invention, the high-pressure air discharged from the air motor bleeds into the cylindrical cap, and the fine "dust" generated during the twisting of the wires accompanies the high-pressure air and causes the machine to move. The purpose of this invention is to provide an electric wire twisting machine that meets the above requirements while keeping the overall size small through simple and rational improvements to the constituent parts of the electric wire twisting machine that is discharged outside. In order to achieve the object, the wire twisting machine according to the present invention has the configuration described in detail at the beginning, in which a washer that shields the exposed surface of the bearing and also serves to prevent dust intrusion and oil leakage is pressed tightly against the exposed surface. A washer presser for fixing the wire in the above-mentioned state is integrally connected to the inner surface of the cylindrical cap, and the washer press is formed with a notch for passage movement relative to the group of wire clamping pieces of the cylindrical cap and a portion integral therewith. It is characterized by its structure.

<Function> According to the electric wire twisting machine according to the present invention having the above-mentioned characteristic structure, when the rotation of the driving rotating cylindrical member is stopped, the plurality of wire clamping pieces move away from the extension axis of the rotating cylindrical member. It is oscillated and
Since the wire insertion opening formed by the group of clamping pieces is in an open state, the plurality of bare conductor parts to be twisted and bundled are inserted to a depth where the uncoated peeled end portions of the wires reach the position where the wire clamping pieces are present. It can be easily inserted with a one-handed operation from the front of the machine.
When the driving rotating shaft and the cylindrical member are driven and rotated together in such an inserted state, each wire clamping piece swings toward the extended axis of the rotating shaft due to rotational centrifugal force, and is inserted and held as described above. The vicinity of the proximal end portions of the plurality of bare conductor wires are held from the outside with a force equivalent to the centrifugal force. By pulling out and moving the plurality of electric wires in the opposite direction to the above-mentioned insertion direction in this sandwiched state, a twisting force is applied to the plurality of bare conductor portions, and the wires are twisted and bundled. After such wire twisting work, the cylindrical cap is detached from the grip cover and pulled forward to expose the wire clamp group and remove debris generated during the wire twisting work. , Perform maintenance to ensure that the next twisting operation can be carried out smoothly. Further, after such maintenance is completed, the cylindrical cap is connected and attached to the grip cover again, and at this time, the washer presser, which is integrally connected to the inner surface of the cover, presses the washer against the exposed surface of the bearing. This will prevent debris generated inside the cylindrical cap during the twisting process from entering between the inner and outer races of the bearing, and prevent oil injected into the bearing from leaking into the cylindrical cap. It is.

<Examples> Examples of the present invention will be described below in detail based on the drawings.

In FIGS. 1 to 9, reference numeral 1 denotes a drive that is rotatably supported only through a bearing 10 that is fitted and held in a bottomed cylindrical holder 15 fitted at the tip of a cylindrical grip cover 8. It is a rotation axis,
This is an example of a rotational drive source, and is connected and interlocked with the air motor 6 built into the base end of the grip cover 8, and is configured so that the grip cover 8 has an outer diameter of about 30 mm and can be strongly gripped with one hand. has been done. 1
Reference numeral 1 denotes an arm holder which is an example of a cylindrical member which is 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, Annular members 11A and 11B having different wall thicknesses are integrally arranged in the vicinity of the tip in the direction of the cylinder axis and at a position a suitable distance behind the tip, and both of these annular members 11
On the peripheral walls of A and 11B, there are cutouts 11a, which are approximately U-shaped when viewed from the front (viewed in the direction of the rotational axis), at three locations spaced at equal intervals of 120 degrees at a center angle in the circumferential direction of rotation.
11b is formed. 2 is the holder 11
The three arms 2 are arranged at equal intervals in the circumferential direction of rotation while being fitted and held in each notch 11a on the distal end side of the holder 11. It has a relatively long protruding length in the axial extension direction of the rotating shaft 1, and is inserted into the annular member 11A so as to cross each of the notches 11a at the base end inserted into each of the notches 11a. Pivotally supported via a pin 13 having an axis substantially orthogonal to the first axis of the rotating shaft at which it is held,
Each arm 2 is configured to be swingable around the axis of the pin 13. To explain the detailed structure of each of the arms 2, as shown in FIGS. 7 and 8, the axis of the rotary shaft 1 is formed on the base end side by the centrifugal force of the rotary shaft 1. A weight part 3 that acts so as to move away from the arm 2 and swing 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 weight portion 3 is fitted and held in the rear end side notch 11b, and the tip of each arm 2 is provided with a force to the extension axis side due to the rotational centrifugal force. As shown in FIG. 5 during rocking movement, the fourth arm is in contact with each other as shown in FIG.
As shown in FIG. 5, a wire clamping piece 5 that closes the stranded wire insertion opening 4, which is biased and maintained in the open state as shown in the figure, is provided in series. The material is cut into a series of pieces, and the entire structure is formed into a substantially straight line. Each of the wire clamping pieces 5 has a relatively wide rectangular plate shape along the direction of the swing axis of the arm 2, and has an inclined position such that the closer to one end it approaches the swing axis in the width direction. It is composed of Reference numeral 9 denotes a cylindrical cap that is removably attached to the tip of the grip cover 8 via a threaded portion 17 so as to house the holder 11 and the second group of arms. To explain, as clearly shown in FIG. 9, an electric wire insertion guide hole 9A is formed at the tip thereof in a state that it is coaxially connected to the opening 4, and this guide hole 9A gradually opens toward the side closer to the opening 4. The cap 9 is formed in a tapered shape with a small diameter, and is provided at a position near the proximal end of the cap 9 to prevent dust from entering between the inner and outer races of the bearings 16 and 10 and to prevent lubricating oil for the bearing from leaking out. The annular washer 18 for prevention is attached to the holder 1 by screwing the cap 9 to the grip cover 8.
5. A washer presser 19 which is press-fixed to the outer surface of the bearing 16 is integrally formed in an annular shape so as to protrude inwardly. A notch 19A is formed in each of the arms 2 to allow passage of the weight part 3 integrally connected thereto, and furthermore, a notch 19A is formed in the peripheral wall of the cap 9 near the position where the group of wire clamping pieces 5 exists. At the same time, the high-pressure air that is bled into the cap 9 from the air motor 6 is allowed to escape to the outer periphery of the cap 9, and the so-called waste, such as broken ends of wires generated during twisting, is discharged from the cap 9 on the flow of the escape air. Slit-shaped hole 20A and single circular hole 20B to be removed
is formed. Reference numeral 7 denotes an operating lever for rotating and stopping the air motor 6, and the air motor 6 is pivotally mounted to a cylindrical grip cover 8 provided inside. 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. The opening 4 is inserted into the opening 4 through the center guiding action of the tip insertion guide port 9A of the cylindrical cap 9.
After insertion, the air motor 6 is actuated by operating the lever 7 to drive and rotate the rotating shaft 1 and the holder 11, thereby performing the twisting work as explained in the above-mentioned operation section. During this twisting operation, most of the air bled from the air motor 6 into the cylindrical cap 9 escapes to the outside side from the hole 20 formed in the circumferential wall of the cap 9, and the debris generated inside the cap 9 is removed. Since it is discharged to the outside together with the escape air, blowback from the insertion guide port 9A is suppressed, and at the same time, the air density inside the cap 9 is maintained at a relatively low state, so that the wire clamping piece 5 and the arm The so-called wind noise caused by the high-speed rotation of the second and third groups of weight parts is reduced, and a sound-deadening effect is exhibited. After the twisting operation, if necessary, the cap 9 is unscrewed from the grip cover 8 and pulled out forward, thereby exposing the arm group 2 and allowing for cleaning.

Other examples will be listed below.

〓〓 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.

〓〓 In the shape of the wire clamping piece 5, as shown in Fig. 10, by forming the central part of the wire clamping edge 5a in an arc shape, the plurality of bare conductor parts do not come apart when pinching and twisting, and are kept in the center. As a result, the desired twisting and binding can be performed more reliably and strongly.

In order to prevent the contact and clamping edge of the bare wire portion b of the wire clamping piece 5 from becoming a knife edge, the contact and clamping edge 5a of the wire clamping piece 5 is entirely cut as shown in FIG. The gripping piece 5 may be rounded, only both corners may be rounded, or a coating or removable cover type covering 5a may be provided to both provide wear resistance treatment and line breakage prevention treatment for the holding piece 5.

Although not shown, the wire clamping piece 5 may be configured to be swingable around an axis parallel to the rotation axis. In this case, the wire clamping piece 5 and the weight part 3 as a whole can be viewed from the front. It is desirable to configure it into a magatama shape so that the actual radius is small.

<Effects of the invention> As is clear from the detailed description above, when the present invention is used, (1) safety during use can be ensured due to the presence of the cylindrical cap 9, and (2) safety during use can be ensured. By separating the cap 9 from the grip cover 8 as necessary, it is possible to reliably and completely remove scraps such as cut ends of wires that are generated and accumulated in the cylindrical cap 9 during twisting work without leaving any residue behind. This allows the twisting work to be performed smoothly and reliably one after another.

(3) Moreover, the washer 1 serves both to prevent dust from entering between the inner and outer races of the bearing 16 and to prevent oil leakage from the bearing.
A washer presser 19 is integrally connected to the cylindrical cap 9 and presses and tightly fixes the washer 1 to the exposed surface of the bearing 16. By connecting the cap 9 to the grip cover 8, the washer 1
Since the cap 8 can be fixed in the desired operating position, the number of parts can be reduced compared to the case where a washer presser is provided separately from the cap 9, and the structure can be simplified. It is also easy to assemble during maintenance.

(4) In addition, there is a notch 1 for moving the 5 groups of paired wire clamping pieces of the cylindrical cap 9 during maintenance.
By forming 9A on the washer presser foot 19, there is no need to make the diameter of the cylindrical cap 9 larger than necessary, and the diameter of the cylindrical cap 9 can be made as small as possible so that it is easy to handle and has excellent maintenance workability. I was able to do it.

[Brief explanation of the drawing]

Figures 1 to 9 show one embodiment of the present invention, Figures 1 and 2 are partially cutaway perspective views, Figure 3 is a partially cutaway side view, and Figures 4 and 5 are partially cutaway side views. Enlarged longitudinal sectional front view of main parts corresponding to Figures 1 and 2, Figure 6
The figures are a longitudinal sectional front view taken along the line of Fig. 3, Figs. 7 and 8 are enlarged side views and plan views of the components, Fig. 9 is a semi-vertical sectional side view of the cylindrical cap, and Figs. Figures 11A, 2B, and 11C show different embodiments, respectively. Figure 10 is an enlarged perspective view of the components, and Figure 11
Figures A, B, and C are enlarged sectional views of important parts. 1 is the drive rotation shaft, 2 is the arm, 3 is the weight part, 4
1 is an opening for inserting twisted electric wires, 5 is a wire clamping piece, 6 is a rotational drive source (air motor), 7 is an operating lever, 8 is a grip cover, 9 is a cylindrical cap, 11 is a drive rotating cylindrical member, 16 is a bearing , 18 is a washer, and 19 is a washer foot.

Claims (1)

[Claims for Utility Model Registration] At the tip of the cylindrical grip cover 8, the cover 8
The cylindrical member 11 is attached to the bearing 1 in a state where it can rotate integrally with the drive rotation shaft 1 of the air motor 6 installed inside.
6, and this driving rotary cylindrical part 1
Wire clamping pieces are provided at multiple locations on the circumference of the unit 1 at equal or almost equal intervals in the rotational circumferential direction, and are movable in a direction to clamp multiple electric wires against the biasing force due to rotational centrifugal force. 5, a cylindrical cap 9 surrounding the 5 groups of wire clamping pieces and the driving rotary cylindrical member 11 is detachably provided with respect to the grip cover 8, and the bearing 16
In the electric wire twisting machine, a washer 18, which serves both to prevent dust intrusion and to prevent oil leakage, is tightly pressed against the exposed surface by a washer presser 19. It is integrally connected to the inner surface of the cylindrical cap 9 that bleeds from the side of the cover 8, and the washer presser 19 has a passage for the group of wire clamping pieces 5 of the cylindrical cap 9 and the part 3 integral therewith. An electric wire twisting machine characterized in that a cutout portion 19A for movement is formed. Utility model registration claim 1, wherein the group of 5 wire clamping pieces is connected to each tip of the arm 2 which is swingable around an axis substantially perpendicular to the rotational axis of the cylindrical member 11. The electric wire twisting machine described in section.