JP5965287B2 - Rotating polishing tool - Google Patents

Description

  The present invention relates to a rotary polishing tool for removing an oxide film layer on the surface of a core wire such as a covered electric wire.

  An insulating oxide film is easily formed on the surface of the metallic core wire used for the covered electric wire. For this reason, it is not sufficient to remove the coating, and it is necessary to perform the terminal connection work after removing the oxide film.

  FIG. 6 shows a conventional polishing tool 101 for a wire tip. The polishing tool 101 is provided with a housing 109 that rotates when the rotational force input to the operating shaft 102 provided below is transmitted by the bevel gear 103. Inside the housing 109, there is provided a brush receiver 105 into which a channel inner brush 106 is press-fitted and fixed. The opening diameter of the central portion of the channel inner brush 106 is set to be slightly smaller than the outer diameter of the conductor 120a of the covered electric wire 120 to be inserted.

  When this polishing tool 101 is used, the oxide film is removed and a good connection state can be formed. Such a technique is disclosed in Patent Document 1, for example.

JP-A-8-163730

  However, in order to ensure that the tip of the brush comes into contact with the surface of the core wire (conductor 120a), the opening diameter of the central portion of the brush is designed to be slightly smaller than the outer shape of the conductor of the covered electric wire to be polished. ing. The brush bends when the conductor is inserted, and the tip of the brush is pressed against the conductor by the elastic force generated thereby, and the surface of the conductor is polished.

  For this reason, the indentation resistance of the covered electric wire (conductor portion) is large. Further, if the covered electric wire is pulled out carelessly, the tip of the brush and the core wire are likely to be damaged.

  Accordingly, an object of the present invention is to provide a rotary polishing tool capable of easily inserting and extracting a core wire without causing damage to the brush and the core wire in order to solve the above-described problems.

  In order to achieve the above object, a rotating polishing tool of the present invention is a rotating polishing tool that polishes the surface of a cable with a brush that rotates around the central axis of the cable, wherein a cable insertion region is formed, and the insertion direction back side A body having a through hole formed therein, at least one brush body disposed in a state in which the tip of the brush enters the insertion region, and a head formed at one end being left outside and being loosely passed through the through hole. The other end is provided with a support pin fixed to the back side in the insertion direction of the brush body, and urging means for urging the brush body toward the insertion region with respect to the main body.

  In addition to the above configuration, the rotary polishing tool of the present invention is characterized in that the biasing means is a spring externally fitted to the support pin in a compressed state between the inside of the main body and the brush body.

  Furthermore, the rotary polishing tool of the present invention is characterized in that, in addition to the above configuration, two brush bodies are arranged so that the brushes face each other across the insertion region.

  Further, the rotary polishing tool of the present invention is characterized in that a gap is formed at least on the opposite side in the rotational direction around the central axis with respect to the brush body.

  As described above, according to the present invention, since the support pin is loosely penetrated through the through hole of the main body, the support pin can swing around the through hole and can slide within the through hole. As a result, the brush body to which the support pin is fixed is the main body in a state that can be combined and moved in a direction perpendicular to the central axis of the cable inserted into the insertion region and swinging around the through hole. It is connected to.

  For this reason, the brush body can be swung around the through hole and the inlet side can be widened, so that the cable can be easily inserted. Further, when the cable is completely inserted into the insertion region and the tip of the brush that has entered the insertion region is retracted, the support pin protrudes outward from the through hole. At this time, the movement direction of the brush body is changed to a direction substantially orthogonal to the cable, and the brush is directed in the direction along the cable, so that a good polishing posture can be maintained.

  Further, according to the present invention, since the spring is externally fitted to the support pin, a force for returning the brush body in the direction orthogonal to the cable to the insertion region side is generated. Moreover, the force which returns the brush body rock | fluctuated centering | focusing on the through-hole of a main body to the direction along the insertion direction also arises. Thus, with a simple configuration, the cable can be easily received, and a stable polishing operation can be performed while keeping the posture of the brush body in a good state.

  Furthermore, according to the present invention, since the brush bodies are arranged opposite to each other, the amount of displacement in the forward / backward movement of the brush body in the direction orthogonal to the cable and the oscillation of the brush body around the through hole is halved. Just do it. This increases the flexibility in cable reception and polishing operations.

  Further, according to the present invention, since the air gap is formed at least on the opposite side in the rotational direction around the central axis with respect to the brush body, when the rotary polishing tool is rotated after inserting the cable, the brush body The inlet side is tilted in such a way that it is left behind in the direction of rotation. Thereby, when rotating in the twisting direction of the stranded wire, the brush body is along the twisting direction, so that the brush smoothly slides along the twisted groove formed by the stranded wire. In addition, since a force for pushing out the cable is generated in response to the reaction force from the brush that comes into sliding contact, it is possible to smoothly slide the rotary polishing tool in the axial direction.

1 is an overall perspective view of a rotary polishing tool according to a first embodiment of the present invention. It is a three-dimensional exploded view of the rotary polishing tool of FIG. 1A and 1B show changes when a cable is inserted into the rotary polishing tool of FIG. 1, in which FIG. 1A shows a state in which the cable is not inserted, FIG. It is the effect | action figure which showed the state by which the cable was penetrated to the side. It is a side view of the entrance side of the rotary polishing tool which concerns on the 2nd Embodiment of this invention. It is the side view which looked at the rotary polishing tool of FIG. 4 from the support pin side. It is the figure which showed the conventional surface polishing apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 shows an overall perspective view of a rotary polishing tool 1 according to a first embodiment of the present invention. FIG. 2 shows a three-dimensional exploded view of the rotary polishing tool 1. However, in FIG. 1, the lid 3 shown in FIG. 2 is omitted for convenience of explanation. Moreover, in FIG. 1, it has shown in the state which fractured | ruptured the upper half of the main body 2 of the rotary polishing tool 1.

  First, referring to FIG. 1, an insertion region 10 into which the cable 20 can be inserted is formed in the center of the body 2 of the rotary polishing tool 1. A through hole 2 a is formed at a position facing the wall on the back side in the insertion direction of the main body 2 across the insertion region 10.

  In addition, on the back side in the insertion direction, a connecting cylinder portion 2b is formed extending to the insertion region 10. A rotation drive device for rotating the rotary polishing tool 1 around the central axis 21 of the cable 20 is connected to the connecting cylinder portion 2b, but the configuration thereof is omitted here. As shown in FIG. 1, the cable 20 to be inserted is inserted in the direction of the arrow 12 with the covering removed.

  With reference to FIGS. 1 and 2, a head 6 c formed on one end 6 a side of the support pin 6 is disposed through the through hole 2 a so as to protrude to the outside of the main body 2. The other end 6 b extending in a direction substantially orthogonal to the cable 20 inserted through the rotary polishing tool 1 is connected to the back side of the brush body 4 inside the main body 2. Here, the opening diameter of the through hole 2a is formed to be considerably larger than the outer diameter of the support pin 6 so that the support pin 6 can swing in the hole. It has become.

  A spring 8 (biasing means) is fitted on the support pin 6. Since the spring 8 is disposed in a compressed state between the inner wall of the main body 2 and the brush body 4, the brush body 4 is urged toward the insertion region 10 and stably held.

  The position of the brush body 4 is held such that the tip of the brush 4a partially enters the insertion region 10 when no external force is applied.

  With such a configuration, when the support pin 6 moves in the longitudinal direction of the support pin 6 and slides in the through hole 2a, the penetration depth of the brush 4a into the insertion region 10 changes. In addition, when the support pin 6 swings (shakes) with the through hole 2a as a fulcrum, the inlet side of the brush body 4 swings, and the inlet side of the insertion region 10 can be opened and closed. That is, the sliding in the through hole 2a and the swinging with the through hole 2a as a fulcrum can be performed in combination, so that the cable 20 can be inserted flexibly so that the snake swallows the egg. It becomes.

  Next, the operation of the brush body 4 when the cable 20 is inserted will be described with reference to FIG. 3 shows a process in which the cable 20 is inserted and arranged in the rotary polishing tool 1. FIG. 3 (a) shows a state where the cable 20 is not inserted, and FIG. 3 (b) shows that the tip of the cable 20 is a brush. FIG. 3C shows a state where the tip of the cable 20 has passed through the back side of the brush body 4 and has advanced to the connecting cylinder portion 2b.

  As can be seen from FIG. 3A, in the state before the cable 20 is inserted, the tip of the brush 4 a is arranged to enter the insertion region 10, and the interval between the opposing brush bodies 4 is the outer diameter of the cable 20. Is smaller than

When the state shifts from this state to the state shown in FIG. 3B, the opposing brush bodies 4 are respectively excluded from the insertion region 10 by the tip of the inserted cable 20, and swing around the through hole 2a. Thereby, the space | interval of the entrance side of the brush body 4 spreads, and the front-end | tip of the cable 20 approachs in the penetration area | region 10. FIG.

  When the cable 20 further enters the back side, the support pin 6 returns to the original angle so as to return the distance on the entrance side of the brush body 4 that has spread in the state of FIG. The head 6c (see FIG. 2) of the support pin 6 protrudes outside the main body 2 so as to spread. In this way, as shown in FIG. 3C, the cable 20 is inserted to the back side, and the posture is stabilized in a state where the entire brush 4 a of the brush body 4 is in contact with the surface of the cable 20.

  In the stage of FIG. 3 (c), the cable 20 advances to the back side in the insertion direction (the connecting cylinder part 2b side), so that the swing of the brush body 4 around the through hole 2a is suppressed, and the cable 20 is in the longitudinal direction. The parallel state of the brush body 4 is satisfactorily maintained. Further, the contracted spring 8 applies a sufficient pressure to the surface of the cable 20 for polishing.

  Generally, in order to polish with high accuracy, it is necessary to press the tip of the brush against the surface of the cable with an appropriate pressure. Therefore, in order to obtain this pressure, the space formed by the tip of the brush is designed to be narrower than the outer diameter of the inserted cable. Thereby, the pressure based on the elastic repulsive force of a brush at the time of cable insertion is obtained. However, as a result, it is often difficult to insert the cable.

  Compared to this, in the configuration according to the present embodiment, the cable 20 can be flexibly received by changing the angle of the brush body 4 by the above-described combined operation, and the working efficiency is improved. To do.

  Moreover, since the cable 20 can be received flexibly, unnecessary force is not applied to the core wire, and it is also possible to prevent the twisting from collapsing.

  Further, when the inserted cable 20 is pulled out, the distal end position of the cable 20 passes through the position of the support pin 6 (through hole 2a) in the longitudinal direction and approaches the inlet side, and the through hole 2a is used as a fulcrum. The brush body 4 can swing easily. Thus, since the cable 20 is released at a stage before it is completely pulled out of the rotary polishing tool 1, it is possible to prevent damage to the twisting of the stranded wires.

  In addition, according to the configuration of the rotary polishing tool 1 according to the present embodiment, surface polishing can be similarly performed on cables having different diameters, which can be widely applied. In other words, in the past, most of the configurations were such that surface polishing was performed using only the elastic repulsive force of the brush bent by the insertion of the cable. However, in the rotary polishing tool 1, the elastic repulsive force of the brush 4a and the spring 8 are used. An appropriate pressure can be obtained by the combined force of the repulsive force. For this reason, even when a cable having a relatively large diameter is inserted, an excessive repulsive force can be absorbed by the contraction of the spring 8, and it acts as a cushioning material so that an appropriate pressure is generated.

  In the above-described embodiment, the configuration in which the pair of brush bodies 4 are disposed opposite to each other in the main body 2 has been shown as an example. However, the same effect can be obtained.

  In the above embodiment, the configuration in which the spring 8 is fitted around the support pin 6 as an urging means is shown as an example. However, the swing of the support pin 6 around the through hole 2a and the through hole 2a. Any urging means other than a spring may be used as long as the urging means can slide the inner support pin 6, and the structure may not be fitted to the support pin 6.

  In the above embodiment, the insertion region 10 is shown as an example of a configuration that is formed by a curved surface that forms a part of a cylinder. For example, a guide composed of a plurality of wires may be used.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to the drawings. Here, the same members and the same configurations as those of the rotary polishing tool 1 shown in the first embodiment will be described with the same reference numerals.

  FIG. 4 shows a side view of the rotary polishing tool 51 according to the present embodiment as viewed from the insertion direction entrance side of the cable 20. Here, for convenience of explanation, the lid 3 (see FIG. 2) for closing the inlet side of the main body 52 is omitted.

  In FIG. 4A, as shown in FIG. 3B in the first embodiment, the tip of the cable 20 (a two-dot chain line circle) is inserted into the insertion region 10, and the pair of brush bodies 4 is inserted. It is shown that the space between the entrance sides of the door is expanded. FIG. 4B shows a state in which the rotary polishing tool 51 is rotated counterclockwise in the state of FIG.

  As can be seen from FIG. 4A, the rotary polishing tool 51 of the present embodiment and the rotary polishing tool 1 of the first embodiment are different in the shape of the space of the main body 52.

  Specifically, among the gaps formed between the brush body 4 and the inside of the main body 52, a gap 22 larger than the other gaps is formed on the opposite side of the rotational direction of the rotary polishing tool 51 with respect to the cable 20. ing. As a result, as shown in FIG. 4B, the rotary polishing tool 51 is moved back in the state where the tip of the inserted cable 20 and the inlet side of the brush 4a are in contact with each other as shown in FIG. When rotated clockwise, the inlet side of the brush body 4 is dragged and tilted so as to remain in the clockwise direction by the action of frictional force with the cable 20.

  FIG. 5 shows the state of FIG. 4B viewed from the support pin 6 side. As can be seen from FIG. 5, since the rotary polishing tool 51 is rotated in the twisting direction of the cable 20, the brush body 4 tilts in a direction along the twisted wire direction.

  With such a configuration, after the cable 20 is once inserted to the back side to the area where surface polishing is necessary, when the rotary polishing tool 51 is rotated, the spiral formed in the gap between the individual wires constituting the stranded wire The tip of the brush 4a is slidably moved along the groove. Thereby, a force acts on the cable 20 in the direction (entrance side) pushed out from the rotary polishing tool 51 by the reaction force from the tip of the brush 4a that pushes the spiral groove.

  That is, by rotating the rotary polishing tool 51, a propulsive force is generated along the longitudinal direction of the cable 20, so that the feeding operation in the longitudinal direction of the cable 20 is supported, and it becomes easy to perform surface polishing. Work efficiency is improved.

  Moreover, the effect which becomes easy to insert the cable 20 can also be acquired similarly to the rotary polishing tool 1 shown in FIG. 1 in 1st Embodiment.

  In the present embodiment, as in the first embodiment, the configuration including the pair of brush bodies 4 is shown as an example. However, if one side of the insertion region is closed, one brush body is provided. Even if it comprises, the same effect can be acquired.

  Moreover, in 2nd Embodiment, the structure where the space | gap 22 was formed so that each of the two brush bodies 4 could rock | fluctuate to a reverse direction with respect to the rotation direction of the rotary polishing tool 51 was shown as an example. However, if the gap 22 is formed in at least one of the two brush bodies 4, the same effect can be obtained. Further, the gap 22 may be formed not only on the side opposite to the rotation direction of the rotary polishing tool 51 with respect to the brush body 4 but also on both sides.

  Moreover, in each said embodiment, although the example where the through-hole 2a was formed with the circular hole was shown, if it is formed with the elongate hole extended in an insertion direction, the entrance to the direction where the inlet of the brush body 4 opens is shown. Oscillation is easy.

DESCRIPTION OF SYMBOLS 1, 51 Rotating polishing tool 2, 52 Main body 2a Through-hole 2b Connection cylinder part 3 Lid part 4 Brush body 4a Brush 6 Support pin 6a One end 6b Other end 6c Head 8 Spring (biasing means)
DESCRIPTION OF SYMBOLS 10 Insertion area 12 Insertion direction 16 Insertion port 20 Cable 21 Center axis 22 Space

Claims (4)

A rotary polishing tool for polishing the surface of the cable with a brush rotating around the central axis of the cable,
A main body in which an insertion region of the cable is formed and a through hole is formed on the back side in the insertion direction;
At least one brush body disposed in a state in which the tip of the brush enters the insertion region;
A support pin that is loosely inserted into the through hole leaving the head formed at one end outside, and the other end is fixed to the back side in the insertion direction of the brush body;
Biasing means for biasing the brush body toward the insertion region with respect to the main body;
A rotary polishing tool comprising:   2. The rotary polishing tool according to claim 1, wherein the biasing means is a spring externally fitted to the support pin in a compressed state between the inside of the main body and the brush body.   The rotary polishing tool according to claim 1 or 2, wherein the two brush bodies are arranged so that the brushes face each other across the insertion region.   The rotary polishing tool according to any one of claims 1 to 3, wherein a gap is formed at least on the opposite side in the rotational direction around the central axis with respect to the brush body.