JP2016119744A - Protective tube insertion/removal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective tube insertion/removal device which prevents a protective tube from being disconnected and in which, even if the protective tube is disconnected, removal work can be easily started by a remote operation.SOLUTION: A protective tube insertion/removal device 1 comprises a guide plate 2 that is spread in a vertical direction. In a lower end of the guide plate 2, a guide rail 4 for guiding the protective tube is included. At a lower side of the guide rail 4, a base part 12 is disposed so as to reciprocate in a direction of insertion of the protective tube. The base part 12 can be inverted back and forth in the direction of insertion by an inversion shaft 14. On the base part 12, an oscillation arm 22 is pivoted that is defined as a supporting point 22c, at a position different from an inversion center. The oscillation arm 22 is energized closer to the guide rail 4 and in an oscillation end 22a, a roller 26 is mounted so as to be rotated in one direction. The roller 26 can be rotated only in the same direction as a direction of rotation of the oscillation arm against the energization. At a position where the base part 12 is moved most forwards, a part of the roller 26 can be moved more forwards than the guide rail 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a protective tube insertion / extraction device for inserting or removing a protective tube covering an outer periphery of an electric wire installed on a utility pole or the like.

  When working in the vicinity of an electric wire installed on a power pole, the outer periphery of the electric wire is insulated to prevent the operator or work equipment from touching the electric wire and to protect the electric wire close to trees etc. Covered by a protective tube made of wood.

  FIG. 8 is a perspective view of the connected protection tube 101.

  In the protective tube 101 shown in this figure, a main body portion 102 which is a constituent member, a female fitting portion 103 formed on one end side of the main body portion 102 and a male fitting portion 104 formed on the other end side. Is formed using an insulating material having elasticity and flexibility. As shown by the phantom lines in FIG. 8, these have an inner diameter that can accommodate the electric wire 100 inside, and a slit-like opening 107 is formed above the main body 102 in a straight line in the longitudinal direction. Yes. With such a material and shape, the opening portion 107 is opened, the electric wire 100 is accommodated therein, and the electric power 100 can be covered by closing it with the restoring force based on the elasticity of the protective tube 101. A pair of dovetail portions 109 extending in parallel to the diameter-enlarging side of the cylinder are formed from the opposite edge portions that form the opening 107.

  As shown in FIG. 8, a male fitting portion 104 is formed at one end of the protective tube 101 in the longitudinal direction, and another protective tube having the male fitting portion 104 is formed at the other end. A female fitting portion 103 connectable to 101 is formed. Each of the protective tubes 101 to be connected is set to a predetermined length, and a plurality of the male and female fitting portions 103 and 104 are connected to cover the long electric wire 100.

  Here, the male fitting portion 104 has an outer diameter larger than that of the main body portion 102. The female fitting portion 103 is formed with a housing portion 106 that can accommodate the male fitting portion 104 during fitting and can be coupled internally. Therefore, the outer diameter of the accommodating portion 106 of the female fitting portion 103 is larger than that of the male fitting portion 104.

  In general, when the protective tube 101 as described above is attached to the electric wire 100, the first protective tube 101 is first inserted into the electric wire 100. Subsequently, the distal end of the second protective tube 101 is inserted into the electric wire 100, and the two protective tubes 101 are connected to each other by the male and female fitting portions 103 and 104 while being inserted into the electric wire 100. Then, by repeating such an operation, a plurality of protective tubes 101 are inserted into the electric wire 100.

  Next, the apparatus which removes the above protective tubes 101 from the electric wire 100 is demonstrated. For the protective tube 101, refer to FIG.

FIG. 9 shows a conventional tube remover. The tube remover 200 includes an angle 201 that holds the electric wire 100 from above. The angle 201 has a boat-shaped guide 202 at the tip, and is configured so that the electric wire 100 can be sandwiched between the guide main body 203 whose lower end is inclined. A guide rod 204 is provided at the lower end of the guide main body 203, and the protective tube 101 can be sent along the guide rod 204. The protective tube 101 is sandwiched between a driving tire 205 provided so as to be in contact with an intermediate position of the guide rod 204, and is sent in the removing direction by the rotational force of the driving tire 205. Such a tube remover 200 is described in Patent Document 1.

Japanese Patent Laid-Open No. 10-164718

  In general, when the protective tube 101 having the shape shown in FIG. 8 is used, a female fitting portion 103 opened in a trumpet shape is arranged toward the forward side in order to reduce insertion resistance to the electric wire 100. For this reason, the male fitting part 104 is connected to the inner side of the female fitting part 103 on the backward side.

  On the other hand, the guide bar 204 is disposed so that the forward side is connected to the lower side of the electric wire 100 at an acute angle. For this reason, although it can move without resistance from the guide rod 204 to the electric wire 100, when moving from the electric wire 100 to the guide rod 204 side, the inside of the protective tube 101 is easily caught on the tip of the guide rod 204. In particular, the uneven connecting portion is easily caught, and when the female fitting portion 103 is disposed on the forward side as described above, the tip of the male fitting portion 104 and the tip of the guide rod 204 are removed during the removal operation. It becomes easy to interfere.

  Since the traveling direction of the protective tube 101 changes greatly around the tip of the guide rod 204, a force in the bending direction acts on the protective tube 101. When this bending direction force acts on the connecting portion, the connection is easily released. In this easy-to-disengage state, as described above, when the front end of the guide rod 204 and the front end of the male fitting portion 104 abut against each other, the female fitting portion 103 fitted from the outside is disengaged and precedes protection. Only the tube 101 is drawn into the drive tire 205.

  When the connection is disconnected at a position where the drive tire 205 does not reach in this way, the work is interrupted, and the operator needs to draw the protective tube 101 to the position of the drive tire 205 using a remote control rod or the like. However, since the protective tube 101 covering the electric wire 100 has the opening 107 closed, it is not easy to draw the protective tube 101 to the position of the drive tire 205 by indirect operation. In addition, when many are connected, the sliding resistance between the electric wire 100 and the protective tube 101 is also large, so that the operator may have to move the protective tube 101 directly.

  Thus, when the protection tube is disconnected at the tip of the guide rod, the work efficiency is remarkably lowered, and the work safety is also lowered.

  In view of the above, an object of the present invention is to provide a protective tube insertion / extraction device that can prevent disconnection of the protective tube and can easily start removal work by remote control even when the protective tube is disconnected.

  In order to achieve the above object, a protective tube insertion / extraction device of the present invention is a protective tube insertion / extraction device for inserting / extracting a protective tube having a slit formed in a longitudinal direction thereof into / from an electric wire, and guiding the protective tube to the electric wire. Guide rail, a base portion that can be reciprocated back and forth in the insertion direction along the guide rail, and can be reversed back and forth independently of the reciprocation, and swings in the insertion direction on the base portion A swing arm that is pivotally supported and whose swing end is pivotally biased toward the guide rail, a swing shaft that is perpendicular to the swing surface of the swing arm, and the swing arm. And a roller attached to the swing end so as to be rotatable only in the same direction as the direction against the urging force, and the base portion is disposed on the fulcrum side of the swing arm in front of the reversing shaft. In the first arrangement, at least a part of the roller is Characterized in that the possible expansion forward from Doreru.

  In addition to the above configuration, the protective tube insertion / extraction device of the present invention is arranged such that the guide rail is connected to the front side at an acute angle from the lower side of the electric wire, and the electric wire is connected to the front lower end side. A cut-out portion that is cut out toward the side is formed, the base portion is in a second arrangement that is the reverse of the first arrangement, and the rotation shaft is at the most advanced position of the base portion. It is located in the area | region which opposes.

  Further, in the protective tube insertion / extraction device of the present invention, in addition to the above configuration, the swing arm is in a non-contact state with respect to the guide rail in a rotation region inclined toward the reversing shaft, In addition, the rotation is restricted with a predetermined rotation position that allows contact with the protective tube as a limit.

  In addition to the above-described configuration, the protective tube insertion / extraction device of the present invention is configured such that the roller can come into contact with the cut-out portion of the guide rail in a rotation region in which the swing arm is inclined toward the reversing shaft. The rotation is restricted with a predetermined rotation position as a limit.

  As described above, according to the present invention, since the roller can rotate only in the same direction as the rotation direction against the urging force of the swing arm, the roller is subjected to frictional force as the base portion reciprocates. The integral movement with the protective pipe based on the above and the rolling on the protective pipe are repeated alternately. That is, in the first arrangement in which the reverse shaft of the base portion is disposed forward of the rotation shaft of the roller, the swing arm is inclined rearward (reverse shaft side), so that the protective tube is rearward (extraction direction). ). In the first arrangement in which the protective tube is sent in the extraction direction, the roller can protrude forward from the guide rail, so that the end of the protective tube on the extraction side is reliably received.

  Further, according to the present invention, in addition to the above effects, when the protective tube moves from the electric wire to the guide rail, the end of the protective tube is guided downward by sliding contact with the notch formed at the front end of the guide rail. The This makes it possible to smoothly change the direction from the direction in which the electric wire extends to the direction in which the guide rail extends. Further, in the second arrangement in which the reverse shaft of the base portion is in front of the rotation shaft of the roller, that is, in the arrangement in which the protective tube is sent in the insertion direction, the rotation shaft faces the notch at the most advanced position of the base portion. Therefore, the protective tube inserted into the electric wire can be held until just before the electric wire. Further, in the above-described region facing the cut upper portion, the gap between the roller and the guide rail is increased by the amount that the lower end of the guide rail is cut off. That is, the clamping force between the guide rail and the roller at the upper cut is gradually reduced with the forward movement, so that the protective tube can be smoothly sent out to the electric wire side like a throwing operation.

  Further, according to the present invention, in addition to the above-described effect, since the rotation to the guide rail side is restricted at a predetermined rotation position where the roller does not contact the guide rail, the protective tube is placed on the guide rail. It is possible to reduce the friction between the roller and the guide rail during no idle operation. In addition, when a protective tube is inserted between the roller and the guide rail, the roller comes into contact with the protective tube, and this occurs depending on the amount the swing arm is pushed down against the urging force against the protective tube. The protective tube is held between the roller and the guide rail by the frictional force, and the feeding operation is performed reliably.

  Moreover, according to this invention, in addition to the said effect, a roller can be rotated to the guide rail side to the predetermined | prescribed rotation position which can contact a cut upper part. As a result, since the protective tube can be sandwiched between the guide rail and the roller until the cut portion is reached, the protective tube can be more reliably sent out to the electric wire side or extracted from the electric wire side to the guide rail.

1 is an overall perspective view of a protective tube insertion / extraction device according to a first embodiment of the present invention. It is the front view which showed the state which has a base part in the most advanced position in the protection pipe removal arrangement | positioning (1st arrangement | positioning) of the protection pipe insertion / extraction apparatus of FIG. It is the schematic diagram which showed the positional relationship of the roller and guide rail in 1st Embodiment. It is the front view which showed the state which has a base part in the most advanced position in the protection pipe insertion arrangement | positioning (2nd arrangement | positioning) of the protection pipe insertion / extraction apparatus of FIG. In the operation of removing the protective tube, (a) shows a state in which the roller is located near the cut-out portion, and (b) is a front view showing a state in which the roller is located behind the cut-out portion. In insertion operation of a protection pipe, (a) shows the state where the roller is located behind the cutout, and (b) is a front view showing the state where the roller is located near the cutout. It is the schematic diagram which showed the positional relationship of the roller and guide rail in 2nd Embodiment. It is a figure which shows the conventional protective tube. It is a figure which shows the conventional pipe remover.

  Hereinafter, a protective tube insertion / extraction device according to an embodiment of the present invention will be described with reference to the drawings. For the electric wire and the protective tube, refer to the electric wire 100 and the protective tube 101 shown in FIG.

(First embodiment)
First, the structure of each part is demonstrated about the 1st Embodiment of this invention using FIGS. 1-3. FIG. 1 shows an overall perspective view of the protective tube inserter 1. In FIG. 1, positions where the electric wire 100 and the protective tube 101 are arranged are indicated by two-dot chain lines 100a and 101a. The protective tube insertion / extraction device 1 has a guide plate 2 arranged so as to expand in a substantially vertical direction. A guide rail 4 is provided at the lower end edge of the guide plate 2 to guide the protective tube 101 by cutting inside the protective tube 101. Further, two gripping portions 6 and 7 are provided at the upper edge of the guide plate 2 in order to grip the electric wire 100 from below. On the other hand, a movable gripping portion 8 is provided above the guide plate 2 at a position facing the two gripping portions 6 and 7. The movable gripping portion 8 can be moved up and down by a clamp mechanism 10 configured integrally with the side surface of the guide plate 2, and the protective tube inserter 1 can be fixed to the electric wire 100 by tightening the electric wire 100 from above.

  As shown in FIG. 1, the guide rail 4 is arranged so that the forward side, that is, the forward side in the insertion direction of the protective tube 101 is connected at an acute angle from the lower side of the electric wire 100. A base portion 12 is provided below the guide rail 4 so as to reciprocate along the guide rail 4 in parallel with the insertion direction. In the present embodiment, the crank mechanism 20 is employed to perform this reciprocating motion. The crank mechanism 20 is provided with a sliding arm 20a that can reciprocate in the insertion direction. The sliding arm 20a receives a rotational driving force input from an input unit 20b provided below the crank mechanism 20, and reciprocates. As shown in FIG. 1, the base portion 12 is attached to the tip of a sliding arm 20 a that extends forward from the crank mechanism 20 in the insertion direction.

At the tip of the sliding arm 20a of the crank mechanism 20, an inversion shaft 14 is disposed so as to penetrate in the vertical direction perpendicular to the insertion direction. A base portion 12 is attached to the upper end of the reversing shaft 14, and an eye nut 14a for operating the base portion 12 is provided at the lower end. By operating this eye nut 14 a, the base portion 12 can be rotated around the reversing shaft 14. In addition, below the tip of the sliding arm 20a, cuts 20c are formed downward at two positions of the counter electrode facing in the direction orthogonal to the insertion direction. The reversing shaft 14 has a notch 2
An engaging pin 14b that can be engaged with 0c from below is provided so as to protrude in a direction perpendicular to the reversing shaft 14. As described above, the direction of the base portion 12 is configured to be reversible by 180 degrees.

  A swing arm 22 is provided on the upper portion of the base portion 12 so as to be swingable in the insertion direction. In FIG. 1, the swing shaft 22 b serving as the rotation center of the swing arm 22 is indicated by a one-dot chain line. In the configuration of the present embodiment, the fulcrum 22 c of the swing arm 22 is provided at a position away from the reversing shaft 14. Further, the swing arm 22 is urged by a coil spring 24 in a turning direction toward the guide rail 4. The swing arm 22 is restricted from turning at a predetermined turning position on the way to the guide rail 4. This rotation restriction will be described later.

  A roller 26 is provided at the swing end 22 a of the swing arm 22. The roller 26 is disposed with the rotation shaft 26a facing in a direction orthogonal to the swing surface as indicated by a one-dot chain line in FIG. The roller 26 is provided so as to be rotatable only in the same direction as the rotation direction of the swing arm 22 against the biasing force of the coil spring 24.

  As described above, since the base portion 12 is provided so as to be able to be reversed, the arrangement is such that the fulcrum 22c of the swing arm 22 is positioned in front of the reversing shaft 14 of the base portion 12 (hereinafter referred to as a first arrangement). And an arrangement in which the fulcrum 22c is located behind the inversion shaft 14 (hereinafter referred to as a second arrangement) can be selected. The protective tube insertion / extraction device 1 is set to the first arrangement when the protective tube 101 is removed from the electric wire 100, and conversely, is set to the second arrangement when the protective tube 101 is inserted into the electric wire 100. Is done.

  Next, the base portion 12 in the first arrangement will be described with reference to FIG. FIG. 2 is an enlarged view of the vicinity of the front end portion of the guide rail 4. Here, for convenience of explanation, the reciprocating direction of the base portion 12 is shown horizontal on the paper. In the state shown in FIG. 2, the base portion 12 is at the most advanced position that reaches the most forward side in the reciprocating motion. The electric wire 100 is indicated by a two-dot chain line. As shown in FIG. 2, a cut-up portion 4 a that is rounded up toward the electric wire 100 is formed at the front end of the guide rail 4. In the protective tube inserter / extractor 1 according to the present embodiment, when the base portion 12 is at the most advanced position, a part of the roller 26 is in a state of being advanced further forward than the guide rail 4.

  Here, the positional relationship between the roller 26 and the guide rail 4 will be described with reference to FIG. FIG. 3 schematically shows the positional relationship between the guide rail 4 and the roller 26 when the protective tube 101 is sent in the removal direction or the insertion direction. The outer shape of the roller 26 is represented by a solid line, and the position of the contact surface 26b that contacts the protective tube 101 is represented by a dotted line. Further, the protective tube 101 is represented by a virtual line. As shown in FIG. 3, in the configuration according to the present embodiment, a gap D is formed between the roller 26 and the guide rail 4 during the operation, and the roller 26 is not in contact with the guide rail 4. It is in the state of. However, since the gap D is set to be smaller than the thickness T of the protective tube 101, the roller 26 contacts the protective tube 101 when the protective tube 101 is interposed between the guide rail 4 and the roller 26. It becomes a state. That is, the swing arm 22 (see FIG. 1) rotates at a rotation position (predetermined rotation position) where the roller 26 and the guide rail 4 are not in contact with each other and the roller 26 can contact the protective tube 101. It is regulated.

  If it is necessary to manually move the protective tube 101, the roller 26 is connected to the protective tube 101 by rotating the engagement plate 18 shown in FIG. The base portion 12 descends to a position where it does not come into contact with the repulsive force of the spring 16 and stabilizes. Thereby, the protection tube 101 can be easily moved manually without being interfered by the roller 26.

  Since it is configured as described above, in the first arrangement shown in FIG. 2, when the base portion 12 moves forward along the guide rail 4 during the operation, the swinging pivots in the direction against the bias. A roller 26 that can rotate in the same direction as the arm 22 rolls over the protective tube 101. For this reason, the position of the protective tube 101 does not change, and only the roller 26 moves forward. Conversely, when the base portion 12 moves backward along the guide rail 4, the roller 26 that can rotate only in one direction cannot roll on the protective tube 101, so that the protective tube 101 is integrated with the roller 26 by frictional force. And move backwards.

  Next, the base part 12 in the second arrangement will be described with reference to FIG. Similar to FIG. 2, FIG. 4 is an enlarged view of the vicinity of the front end portion of the guide rail 4. The base portion 12 is disposed at the most advanced position in the reciprocating motion. Contrary to the state of FIG. 2, the reverse shaft 14 of the base portion 12 is positioned in front of the fulcrum 22 c of the swing arm 22. The rotation center of the roller 26 has reached a position facing the cutout 4a, and a part of the roller 26 has advanced to the front side of the guide rail 4.

  Then, the removal operation | work of the protection tube 101 using the protection tube insertion / extraction apparatus 1 is demonstrated using FIG. 5, and an insertion operation is demonstrated using FIG.

  FIG. 5 shows an enlarged view of the front end portion of the guide rail 4. The electric wire 100 is indicated by a two-dot chain line, and the protective tube 101 is indicated by a dotted line. Among these, FIG. 5A shows a state in which the end portion of the protective tube 101 located at the front end portion of the guide rail 4 is sandwiched between the rollers 26. FIG. 5B shows a state where the protective tube 101 is moved rearward (removed side) together with the roller 26 while being sandwiched by the roller 26.

  In FIG. 5A, a portion where the protective tube 101 and the roller 26 are in contact with each other is surrounded by a two-dot chain line ellipse, and the surrounded portion is further enlarged. In the enlarged view surrounded by an ellipse, the arrow indicates the direction of the force acting on the roller 26. An arc-shaped arrow drawn at the rotation center of the roller 26 represents the rotational force 30 based on the bias acting on the swing arm 22. An arrow extending parallel to the side surface of the protective tube 101 at a position in contact with the protective tube 101 represents the frictional force 28 received from the protective tube 101. The other arrows are the component forces 28 a and 28 b of the frictional force 28, and represent the component force 28 a in the rotating direction of the swing arm 22 and the component force 28 b in the extending direction of the swing arm 22, respectively. .

  As shown in the enlarged view surrounded by the ellipse, a part of the frictional force 28 generated by the sliding contact with the protective tube 101 is a force component in the direction of rotating the swing arm 22 toward the electric wire 100 side as a component force 28a. Give rise to Therefore, as the frictional force 28 increases, the roller 26 is more strongly pressed toward the protective tube 101, and the protective tube 101 can be reliably held.

  That is, the force with which the roller 26 holds the protective tube 101 increases only when the resistance when the protective tube 101 is sent along the electric wire 100 increases. Thus, since the clamping force of the roller 26 changes as necessary, it is possible to prevent the protective tube 101 from being deformed by being pressed more than necessary.

  By the way, at the time of removal, the direction of the protection tube 101 that has moved along the electric wire 100 changes greatly at the position where the tip of the guide rail 4 is connected. When the direction is changed at the tip of the guide rail 4, the frictional force 28 generated between the protection tube 101 and the roller 26 increases due to an increase in sliding contact resistance with the guide rail 4 accompanying the deformation of the protection tube 101.

However, since the resistance between the protective tube 101 and the roller 26 increases according to the increased frictional force 28 as described above, the force with which the roller 26 presses the protective tube 101 also increases. Accordingly, it is possible to reliably move the protective tube 101 to the position shown in FIG. 5B without sliding on the protective tube 101.

  Since the front end portion of the guide rail 4 is formed with the cut-out portion 4a, the direction of the protective tube 101 can be changed more smoothly.

  In the present embodiment, a configuration in which the rotation shaft 26 a of the roller 26 can advance to substantially the same position as the end of the guide rail 4 at the most advanced position of the base portion 12 is shown as an example. However, for example, when it is configured to advance further forward, the swinging arm 22 receives pressure in the rotational direction against the bias by the electric wire 100 that abuts. That is, in addition to the above-described action, the urging force of the swing arm 22 acts in a direction that further increases, so that the protective tube 101 can be more securely clamped with the electric wire 100.

  In FIG. 5, the action when the end portion of the protective tube 101 is pinched and removed is taken as an example, but the same applies to the case where the connected protective tube 101 is continuously removed.

  FIG. 6 shows an operation when the protective tube 101 is inserted into the electric wire 100. FIG. 6A shows a state in which the protective tube 101 sandwiched between the guide rail 4 and the roller 26 is sent toward the front end portion of the guide rail 4. FIG. 6B shows a state in which the roller 26 that has advanced together with the protective tube 101 has reached the most advanced position. As in FIG. 5, in FIG. 6A, a portion where the protective tube 101 and the roller 26 are in contact is surrounded by an ellipse indicated by a two-dot chain line, and this surrounded portion is shown in an enlarged manner. As in FIG. 5, the direction of the force acting on the roller 26 is also indicated by an arrow in FIG. 6. An arrow extending parallel to the protective tube 101 represents a frictional force 29 that the roller 26 receives from the protective tube 101. A part of the force generated from the frictional force 29 with the protective tube 101 works as a force (component force 29a) in a direction for rotating the swing arm 22 toward the electric wire 100 side. As described above, when inserting, as in the case of removal, the force for holding the protective tube 101 changes as necessary, and the protective tube 101 can be reliably sent without slipping. The component force 29 b is a component along the direction in which the swing arm 22 extends.

  As described above, FIG. 6B shows a state in which the base portion 12 has reached the most advanced position. In the configuration according to the present embodiment, the rotation shaft 26 a of the roller 26 can reach a region facing the notch 4 a of the guide rail 4. For this reason, it is possible to send out so that the electric wire 100 can be reliably covered to the end part of the protective tube 101.

  By the way, in this Embodiment, the cut-out part 4a is formed in the front edge part of the guide rail 4. As shown in FIG. As a result, the clamping force that is clamped between the guide rail 4 and the roller 26 at a position behind the notch 4a is slightly loosened at a position where it reaches the notch 4a. In other words, at the most forward position of the base portion 12, the force sandwiching the protective tube 101 as in the throwing operation is gradually released, and can be smoothly sent out to the electric wire 100 side. When the protective tube 101 is sent to the cut upper portion 4a, thereafter, the transition to the electric wire 100 is promoted by the action when the deformation of the protective tube 101 made of a resin material is restored. Therefore, it is possible to prevent the protective tube 101 once sent out from being caught and returned together with the roller 26.

  Although FIG. 6 shows an example of the operation when the end portion of the protective tube 101 is inserted and inserted, the same applies to the case where the connected protective tubes 101 are continuously inserted.

(Second Embodiment)
Next, the protective tube inserter 1 according to the second embodiment of the present invention will be described with reference to FIG. In the present embodiment, the same components as those in the protective tube inserter 1 shown in the first embodiment will be described with the same reference numerals.

  FIG. 7 shows the positional relationship between the guide rail 4 and the roller 26 during the feeding operation of the protective tube 101. The outer shape of the roller 26 is represented by a solid line, and the contact surface 26b that contacts the guide rail 4 is represented by a dotted line. At the front end portion of the guide rail 4, a cut-up portion is formed in the range of the region A, and further, the region B at the tip is formed so as to be rounded up further than the cut-up portion 4 a and formed into a rounded shape. .

  The cut-up width of the cut upper portion 4a is indicated by a width D in FIG. Unlike the configuration shown in FIG. 3 in the first embodiment, the position where the roller 26 can come into contact with the notch 4a of the guide rail 4 during the feeding operation of the protective tube 101 (range of width D). It is lifted up to.

  With such a configuration, at the time of removal described in the first embodiment, a sufficient pressing force can be maintained between the protective tube 101 and the roller 26 even at the cut-off portion 4a. It is possible to prevent the tube 101 from being lifted. Further, since the swing arm 22 can be rotated to a position where the roller 26 is completely in contact with the guide rail 4 even at a position on the rear side of the notch 4a, a force sufficient to hold the protective tube 101 is generated. be able to.

  Since the rising position of the roller 26 is restricted within the range of the rising width D of the upper cut portion 4a by the rotation restriction, it is greatly increased even during the idling operation in which the protective tube 101 is not interposed between the guide rail 4 and the roller 26. The roller 26 is not worn.

  Further, as shown in the first embodiment, when the engagement plate 18 (see FIG. 2) is removed from the engagement pin 14b, the roller 26 is separated from the guide rail 4, so that the protective tube 101 is disposed. The wear of the roller 26 can be prevented even during idle running.

  As described above, according to the present invention, since the roller 26 can reliably generate a clamping force in the region where the guide rail 4 and the electric wire 100 are connected, the connection is made in the direction in which the electric wire 100 extends. The arrangement angle of the guide rail 4 can be set larger than the conventional one. Thereby, since the width in the insertion direction of the protective tube inserter / extractor 1 can be designed in a compact manner, handling can be facilitated and work efficiency can be improved.

  In the above embodiment, the configuration in which the oscillating arm 22 is urged using the coil spring 24 is shown as an example. However, the urging is generated using an elastic member such as a leaf spring, for example. It may be a configuration.

  In the above-described embodiment, the configuration in which a part of the roller 26 advances forward from the guide rail 4 together with the first arrangement and the second arrangement at the most advanced position of the base portion 12 is shown as an example. However, the configuration may be such that it completely advances to the front side of the guide rail. In this case, since the pressure received from the electric wire increases as it moves forward, the force for clamping the protective tube between the electric wire and the electric wire also increases, and the electric wire can be inserted and removed more reliably.

  The protective tube inserter / extractor of the present invention is configured so that the protective tube can be reliably held in the connection region between the electric wire and the guide rail, and has a high effect of preventing disconnection of the connecting portion. Useful for loose protective tubes.

DESCRIPTION OF SYMBOLS 1 Protective tube insertion / extraction device 2 Guide plate 4 Guide rail 4a Cut upper part 6, 7 Grasping part 8 Movable gripping part 10 Clamp mechanism 12 Base part 14 Reverse shaft 14a Eye nut 14b Engagement pin 16 Spring 18 Engagement plate 20 Crank mechanism 20a Slide arm 20b Input section 20c Notch 22 Swing arm 22a Swing end 22b Swing shaft 22c Support point 24 Coil spring 26 Roller 26a Rotating shaft 28, 29 Friction force 28a, 28b, 29a, 29b Component force 30 Rotating force A, B Region 100 Electric wire 101 Protective tube 102 Main body 103 Female fitting portion 104 Male fitting portion 106 Housing portion 107 Opening portion 109 Back fin portion 200 Pipe remover 201 Angle 202 Boat-shaped guide 203 Guide main body 204 Guide rod 205 Driving tire D Gap T Thickness of protective tube

Claims (4)

A protective tube insertion / extraction device for inserting / extracting a protective tube having a slit formed in the longitudinal direction of the wire,
A guide rail for guiding the protective tube to the electric wire;
A base portion provided so as to be able to reciprocate back and forth in the insertion direction along the guide rail, and capable of reversing back and forth independently of the reciprocation;
A swing arm pivotally supported on the base portion so as to be swingable in the insertion direction and having a swing end pivotally biased toward the guide rail;
A rotation shaft arranged perpendicularly to the swing surface of the swing arm, and a roller attached to the swing end so as to be rotatable only in the same direction as the direction against the bias of the swing arm. ,
In the first arrangement in which the base portion is arranged with the fulcrum side of the swing arm in front of the reversing shaft, at least a part of the roller can advance forward from the guide rail. Protective tube inserter / extractor. The guide rail is arranged so that the front side is connected to the acute angle from the lower side of the electric wire, and a cut-up portion is formed on the lower end side of the front, which is cut up toward the electric wire side,
2. The base portion according to claim 1, wherein the rotation shaft is located in a region facing the cut-out portion in the second arrangement obtained by inverting the first arrangement and at the most advanced position of the base part. The protective tube inserter described in 1.   The swing arm is limited to a predetermined rotation position where the roller is in a non-contact state with respect to the guide rail and can come into contact with the protective tube in a rotation region inclined toward the reversing shaft. The protective tube insertion / extraction device according to claim 1 or 2, wherein rotation is restricted.   The swing arm is restricted in rotation in a rotation region inclined toward the reversing shaft with a predetermined rotation position at which the roller can come into contact with the cut portion of the guide rail as a limit. The protective tube insertion / extraction device according to claim 1 or 2, characterized in that