TWI663803B - Protective tube inserter - Google Patents

Abstract

A protective tube inserter is provided, which can prevent the connection of the protective tube from being detached, and even if it is detached, it can easily start the removal operation by remote operation.

The protective tube inserter 1 has a guide plate 2 which expands in the vertical direction. A guide rail 4 for guiding a protective tube is provided at the lower end of the guide plate 2. A base portion 12 is arranged below the guide rail 4 so as to be capable of reciprocating in the insertion direction of the protective tube. The base 12 can be reversed forward and backward with respect to the insertion direction by the reversing shaft 14. On the base portion 12, a rocking arm 22 is supported by the shaft, and the rocking arm 22 sets the fulcrum 22c at a position different from the reversing center. Potential energy is added to the rocker arm 22 toward the guide rail 4 side. A drum 26 is attached to the swinging end 22a so as to be rotatable in one direction. The drum 26 can only rotate in the same direction as the rotation direction of the swing arm against the additional potential energy. At the most advanced position of the base 12, a part of the drum 26 can enter and exit forward relative to the guide rail 4.

Description

Protective tube inserter

The present invention relates to a protective tube inserter for inserting or removing a protective tube, the protective tube covering the outer periphery of an electric wire erected on a telephone pole or the like.

In the case of working near a wire erected on a telephone pole, in order to prevent an operator or a working machine from touching the wire, and to protect the wire near a tree, etc., the outer periphery of the wire is covered with a protective tube containing an insulating material.

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

In the protective tube 101 shown in the figure, a body portion 102 as a constituent member, a female fitting portion 103 formed on one end side of the body portion 102, and a male fitting portion 104 formed on the other end side, are It is made of elastic and flexible insulating materials. As shown by an imaginary line in FIG. 8, these members have an inner diameter capable of accommodating the electric wire 100 on the inner side, and a slit-like opening 107 is formed linearly in the length direction above the main body portion 102. According to such a material and shape, the electric wire 100 is accommodated in the interior by opening the opening 107, and then the electric wire 100 can be covered by being closed by the elastic restoring force of the protective tube 101. A pair of dorsal fin portions 109 extending in parallel to the diameter-enlarged side of the cylinder are formed from the opposite end edges of the opening portion 107.

In addition, as shown in FIG. 8, a male fitting portion 104 is formed at one end in the longitudinal direction of the protective tube 101, and a female that can be connected to another protective tube 101 having the male fitting portion 104 is formed at the other end. -Shape fitting portion 103. The linked protective tubes 101 Each of the wires 100 is set to a predetermined length, and a plurality of wires 100 are connected in series with the male and female fitting portions 103 and 104 of each other.

Here, the male fitting portion 104 is formed to have a larger outer diameter than the main body portion 102. In addition, a receiving portion 106 is formed in the female fitting portion 103, and the receiving portion 106 can receive the male fitting portion 104 during fitting and can be combined inside. Accordingly, the receiving portion 106 of the female fitting portion 103 is formed to have a larger outer diameter than the male fitting portion 104.

Normally, when the protective tube 101 is mounted on the electric wire 100 as described above, the first protective tube 101 is first inserted into the electric wire 100. Then, the front end of the second protective tube 101 is continuously inserted into the electric wire 100, and the two protective tubes 101 are connected by the male and female fitting portions 103 and 104 of each other while the electric wire 100 is inserted. Then, by repeating this operation, a plurality of protective tubes 101 are inserted into the electric wire 100.

Next, a device for removing the protective tube 101 from the electric wire 100 as described above will be described. For the protective tube 101, refer to FIG. 8.

Figure 9 shows a conventional tube remover. The pipe remover 200 includes a corner piece 201 that presses the electric wire 100 from above. The corner piece 201 has a boat-shaped guide 202 at the front end, and is configured to clamp the electric wire 100 between the guide body 203 inclined to the lower end. A guide rod 204 is provided at the lower end of the guide body 203, and the protective tube 101 can be conveyed along the guide rod 204. The protective tube 101 is sandwiched between the driving tire 205 and the driving tire 205 which is disposed in contact with the guide rod 204 at an intermediate position, and is conveyed in the disassembly direction by the rotational force of the driving tire 205. Such a pipe remover 200 is described in Patent Document 1.

[Prior technical literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 10-164718

Generally, when the protective tube 101 having the shape shown in FIG. 8 is used, in order to reduce the insertion resistance toward the electric wire 100, the female fitting portion 103 having a horn-shaped opening is arranged toward the forward side. Therefore, the male fitting portion 104 is connected to the inner side of the female fitting portion 103 on the backward side.

On the other hand, the guide rod 204 is arranged so that the forward side is connected below the electric wire 100 at an acute angle. Therefore, the guide rod 204 can be moved toward the electric wire 100 without resistance. However, when the electric rod 100 is moved toward the guide rod 204 side, the front end of the guide rod 204 becomes easily caught by the inside of the protective tube 101. In particular, the connecting portion having unevenness is liable to be caught. As described above, if the female fitting portion 103 is disposed on the forward side, the front end of the male fitting portion 104 becomes easier to engage with the guide rod 204 during the removal operation. Front end interference.

Since the direction of travel of the protective tube 101 changes greatly around the front end of the guide rod 204, a force in a bending direction acts on the protective tube 101. When the force in the bending direction acts on the connection portion, the connection becomes easily detached. In this state of easy disengagement, as described above, if the front end of the guide rod 204 collides with the front end of the male fitting portion 104 on the inside, the female fitting portion 103 inserted from the outside will disengage, only the front protection The tube 101 is introduced by a driving tire 205.

In this way, if the disconnection occurs at a position where the driving tire 205 cannot reach, the operation is interrupted, and the operator needs to use a remote operation lever or the like to pull the protective tube 101 to the driving tire 205 position. However, since the protective tube 101 covering the electric wire 100 has the opening 107 closed, the operation of pulling to the position of the driving tire 205 by indirect operation is not easy. Furthermore, when a plurality of wires are connected, the sliding contact resistance between the electric wire 100 and the protective tube 101 is also large. Therefore, there is a possibility that the operator must move the protective tube 101 directly.

In this way, if the connection and disconnection of the protective tube occurs at the front end of the guide rod, the operating efficiency is significantly reduced, and the safety of the operation is also reduced.

Therefore, an object of the present invention is to provide a protective tube inserter, which can prevent the connection of the protective tube from being detached, and can easily start the removal operation by remote operation even in the case of detachment.

In order to achieve the above-mentioned object, the protective tube inserter of the present invention is a protective tube with a slit formed in a lengthwise direction relative to the electric wire, and is characterized by including a guide rail that guides the protective pipe to the electric wire. The base is configured to move forward and backward along the guide rail in the insertion direction, and is independent of the above-mentioned reciprocating motion and can be reversed forward and backward; a rocking arm that can be pivotally supported on the base by the pivot in the insertion direction, and shakes the end Rotating potential energy is added to the guide rail side; and a roller is provided with a rotation axis perpendicular to the rocking surface of the rocking arm, and can be mounted on the rocking only in the same direction as the direction of the rocking arm against the additional potential energy. And the base is configured such that, when the fulcrum side of the rocker arm is disposed in a first arrangement in front of the reversing shaft, at least a portion of the drum can be advanced in and out of the guide rail.

In addition, in addition to the above configuration, the protective tube inserter of the present invention has the following features: the guide rail is configured to connect the front side at an acute angle from the lower side of the electric wire, and the front lower end side is formed to face the electric wire side upward The disconnected upward disconnection portion is at the most advanced position of the second configuration and the base portion after the first configuration is reversed, and the base portion is located in an area where the rotation axis and the upward disconnection portion oppose.

In addition, the protective tube inserter of the present invention, in addition to the above-mentioned configuration, has the following features: the rocker arm is in a rotation area inclined toward the reverse axis side, and the roller is in a non-contact state with respect to the guide rail, and Can be in contact with the protective tube The predetermined rotation position is used as a limit, and the rotation is restricted.

In addition, in addition to the above structure, the protective tube inserter of the present invention has the following features: the rocker arm is located in a rotating area inclined toward the reverse axis side, and the roller can be disconnected from the upward guide portion of the guide rail. The predetermined rotation position of the contact serves as a limit, and the rotation is restricted.

As described above, according to the present invention, since the drum can only rotate in the same direction as the direction of rotation of the swing arm against the additional potential energy, the drum interacts with the protective tube based on the frictional force repeatedly and repeatedly with the back and forth movement of the base. Sports and rolling on protective tube. That is, in the first arrangement in which the reversing shaft at the base is arranged in front of the rotation shaft of the drum, the swing arm is inclined toward the rear side (reversing shaft side), and therefore, the protective tube is transported toward the rear side (extraction direction). In the first configuration in which the protective tube is conveyed in the direction of extraction, the roller can protrude from the front side than the guide rail, so that the end of the protective tube on the extraction side can be reliably accessed.

In addition, according to the present invention, in addition to the above-mentioned effects, when the protective tube is rotated from the electric wire to the guide rail, the end portion of the protective tube is guided to the lower side by sliding contact with the upward disconnection portion formed at the front end of the guide rail. Thereby, the direction can be smoothly switched from the extending direction of the electric wire to the extending direction of the guide rail. In addition, the reversing axis at the base is located in the second position ahead of the rotation axis of the drum, that is, the protection tube is transported in the insertion direction. At the most advanced position of the base, the rotation axis can be moved to disconnect from the upward direction. The area facing the front of the cable can be kept in front of the cable. Further, in the above-mentioned area facing the upward breaking portion, the drum is separated from the guide rail by an interval corresponding to a portion where the lower end of the guide rail is upwardly cut off. That is, at the upward breaking portion, the clamping force between the guide rail and the drum gradually decreases as it moves toward the forward side, and therefore becomes throwable The protective tube is smoothly conveyed toward the electric wire side as the operation.

In addition, according to the present invention, in addition to the above-mentioned effects, the roller is restricted from rotating toward the guide rail at a predetermined rotational position that does not contact the guide rail. Therefore, the roller can be lowered when the protective tube is not idling on the guide rail. Friction with rails. In addition, in the case where the protective tube is inserted between the drum and the guide rail, since the roller is in contact with the protective tube, the protective tube is blocked by the frictional force generated by the portion pressed by the protective tube against the additional potential energy according to the rocking arm. It is held between the roller and the guide rail, and the conveying operation is performed reliably.

In addition, according to the present invention, in addition to the above-mentioned effects, the drum can be rotated toward the guide rail side to a predetermined rotation position where it can contact the upward disconnection portion. This allows the protective tube to be clamped between the guide rail and the roller until the upward cut-off portion is reached, so that the protective tube can be more reliably sent out toward the electric wire side or can be pulled out from the electric wire side toward the guide rail.

1‧‧‧protective tube inserter

2‧‧‧Guide Board

4‧‧‧rail

4a‧‧‧Upward break

6, 7‧‧‧ holding department

8‧‧‧ movable grip

10‧‧‧ clamping mechanism

12‧‧‧ base

14‧‧‧ reverse axis

14a‧‧‧Ring nut

14b‧‧‧ Snap Pin

16‧‧‧Spring

18‧‧‧ Plywood

20‧‧‧Crank mechanism

20a‧‧‧ sliding arm

20b‧‧‧Input Department

20c‧‧‧cut entrance

22‧‧‧ rocking arm

22a‧‧‧Shake end

22b‧‧‧Shake

22c‧‧‧ Fulcrum

24‧‧‧ Coil Spring

26‧‧‧ roller

26a‧‧‧rotation shaft

26b‧‧‧ abutment

28, 29‧‧‧ Friction

28a, 28b, 29a, 29b

30‧‧‧rotating force

100‧‧‧Wire

100a‧‧‧Two-point chain line

101‧‧‧ protective tube

101a‧‧‧Two-point chain line

102‧‧‧Body

103‧‧‧female mosaic

104‧‧‧Male Fitting

106‧‧‧ Containment Department

107‧‧‧ opening

109‧‧‧ dorsal fin

200‧‧‧ tube remover

201‧‧‧Angle pieces

202‧‧‧Boat Guide

203‧‧‧Guide

204‧‧‧Guide

205‧‧‧Drive tire

Areas A and B‧‧‧

D‧‧‧ Clearance

T‧‧‧thickness of protective tube

W‧‧‧Width

FIG. 1 is an overall perspective view of a protective tube inserter according to a first embodiment of the present invention.

FIG. 2 is a front view showing a state in which a base portion of the protective tube remover (first configuration) of the protective tube inserter of FIG. 1 is in a most advanced position.

FIG. 3 is a schematic diagram showing a positional relationship between a roller and a guide rail according to the first embodiment.

FIG. 4 is a front view showing a state where the base portion of the protective tube inserter of the protective tube inserter of FIG. 1 is in the most advanced position in the protective tube insertion configuration (second configuration).

FIG. 5 is a front view showing a state where the roller is located near the upward disconnection portion during a removal operation of the protective tube, and (b) a front view showing a state where the roller is located behind the upward disconnection portion.

Fig. 6 is the insertion operation of the protective tube, (a) shows that the drum is located at the upper disconnected portion Front view of the rear state, (b) Front view of the state where the drum is located near the upward break.

FIG. 7 is a schematic diagram showing a positional relationship between a roller and a guide rail according to the second embodiment.

FIG. 8 is a diagram showing a conventional protective tube.

Fig. 9 is a diagram showing a conventional tube remover.

Hereinafter, a protective tube inserter according to an embodiment of the present invention will be described using drawings. For the electric wires and the protective tube, refer to the electric wire 100 and the protective tube 101 shown in FIG. 8.

(First Embodiment)

First, the configuration of each part of the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is an overall perspective view showing a protective tube inserter 1. In FIG. 1, the two-point chain lines 100 a and 101 a indicate positions where the electric wires 100 and the protective tube 101 are arranged. The protective tube inserter 1 includes a guide plate 2 arranged to expand in a substantially vertical direction. The lower end edge of the guide plate 2 is provided with a guide rail 4 which is inserted into the inside of the protective tube 101 and guides the protective tube 101. In addition, two gripping portions 6 and 7 are provided on the upper edge of the guide plate 2 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 grasping portion 8 can be raised and lowered by a clamping mechanism 10 integrally formed with the side surface of the guide plate 2, the electric wire 100 can be clamped from above, and the protective tube inserter 1 is fixed to the electric wire 100.

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

At the front end of the slide arm 20a of the crank mechanism 20, a reversing shaft 14 is disposed penetratingly in a vertical direction perpendicular to the insertion direction. A base portion 12 is mounted on the upper end of the reversing shaft 14, and a ring nut 14 a is provided on the lower end for performing the operation of the base portion 12. By operating the ring nut 14 a, the base portion 12 can be rotated about the reversing shaft 14. In addition, below the front end of the slide arm 20a, a downward cut inlet 20c is formed at two locations facing the opposite pole positions in a direction orthogonal to the insertion direction. In addition, the reversing shaft 14 is provided with an engaging pin 14 b that can be engaged with the cut-in opening 20 c from below, and the engaging pin 14 b projects in a direction orthogonal to the reversing shaft 14. In this way, the orientation 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, a swing axis 22 b serving as a rotation center of the swing arm 22 is shown by a one-dot chain line. In the configuration of this embodiment, the fulcrum 22c of the swing arm 22 is provided at a position separated from the reversing shaft 14. In addition, the swing arm 22 is added with potential energy in a direction of rotation by the coil spring 24, and the direction of rotation is toward the guide rail 4. In addition, the swing arm 22 is restricted from rotating at a predetermined rotation position on the way to the guide rail 4. This rotation restriction will be described later.

A drum 26 is provided at a swing end 22 a of the swing arm 22. As shown by a one-dot chain line in FIG. 1, the drum 26 is configured such that the rotation shaft 26 a is oriented with respect to the swinging surface. Orthogonal direction. This drum 26 is provided to be rotatable only in the same direction as the direction of rotation of the swing arm 22 against the additional potential energy of the coil spring 24.

As described above, the base portion 12 is provided in a reversible manner. Therefore, a configuration in which the fulcrum 22c of the swing arm 22 is located forward of the reversing shaft 14 of the base 12 (hereinafter, referred to as a first configuration) and the fulcrum 22c is optional. Arranged behind the reversing shaft 14 (hereinafter referred to as the second arrangement). When the protective tube 101 is removed from the electric wire 100, the protective tube inserter 1 is set to the first configuration. Conversely, when the protective tube 101 is inserted into the electric wire 100, the protective tube inserter 1 is set to the second one. Configuration.

Next, the base portion 12 located in the first arrangement will be described using FIG. 2. FIG. 2 shows the periphery of the front end of the guide rail 4 on an enlarged side. In addition, for convenience of explanation, the reciprocating direction of the base portion 12 is shown horizontally on the drawing. In the state shown in FIG. 2, the base portion 12 is located at the most forward position which reaches the most forward side in the reciprocating motion. The electric wire 100 is displayed as a two-dot chain line. As shown in FIG. 2, an upward disconnection portion 4 a is formed at an end portion on the front side of the guide rail 4 and is upwardly disconnected toward the electric wire 100 side. In the protective tube inserter 1 of this embodiment, when the base portion 12 is located at the most advanced position, a part of the roller 26 is in a state of entering and exiting from the guide rail 4 toward the front side.

Here, the positional relationship between the drum 26 and the guide rail 4 will be described using FIG. 3. FIG. 3 schematically shows the positional relationship between the guide rail 4 and the roller 26 when the protective tube 101 is transported in the removal direction or the insertion direction. The outer shape of the drum 26 is indicated by a solid line, and the position of the abutting surface 26b abutting the protective tube 101 is indicated by a dotted line. The protective tube 101 is indicated by an imaginary line. As shown in FIG. 3, in the configuration of this embodiment, a gap D is formed between the drum 26 and the guide rail 4 during operation, and the drum 26 is in a non-contact state with respect to the guide rail 4. However, the gap D is set to be smaller than the thickness T of the protective tube 101. Therefore, the protective tube 101 is interposed between the guide rail 4 and the roller 26. Over time, the drum 26 comes into contact with the protective tube 101. That is, the swing arm 22 (refer to FIG. 1) is in a state in which the drum 26 is in non-contact with the guide rail 4, and the rotation position (predetermined rotation position) where the drum 26 can contact the protection tube 101 is restricted.

In addition, when it is necessary to manually move the protective tube 101, if the engaging plate 18 shown in FIG. 2 is rotated to disengage from the engaging pin 14b of the reversing shaft 14, the base portion 12 is lowered to the roller 26 and the protective tube 101. It is in a non-contact position, and is balanced and stable against the reaction force of the spring 16. This makes it possible to easily move the protective tube 101 manually without being interfered by the drum 26.

Due to the structure as described above, in the first configuration shown in FIG. 2, if the base portion 12 advances along the guide rail 4 during operation, the roller 26 that can rotate in the same direction as the swing arm 22 rolls on the protective tube 101 On the other hand, the rocker arm 22 is turned in a direction against the additional potential energy. Therefore, the position of the protective tube 101 does not change, and only the drum 26 moves forward. On the contrary, when the base portion 12 is retracted along the guide rail 4, the roller 26 that can only rotate in one direction cannot roll on the protective tube 101. Therefore, the protective tube 101 moves backward with the roller 26 by friction.

Next, the base part 12 located in the 2nd arrangement is demonstrated using FIG. As in FIG. 2, FIG. 4 shows the periphery of the end portion on the front side of the guide rail 4 in an enlarged manner. The base portion 12 is disposed at the most forward position during the reciprocating motion. Contrary to the state of FIG. 2, the reversing shaft 14 of the base 12 is located forward of the fulcrum 22 c of the swing arm 22. The rotation center of the drum 26 reaches a position facing the upward breaking portion 4a, and a part of the drum 26 is in a state of coming in and out of the guide rail 4.

Next, the removal operation of the protection tube 101 using the protection tube inserter 1 will be described using FIG. 5, and the insertion operation will be described using FIG. 6.

FIG. 5 is an enlarged view showing the front end of the guide rail 4. FIG. Wire 100 It is shown by a two-point chain line, and the protective tube 101 is shown by a dotted line. Among them, FIG. 5 (a) shows a state in which the end of the protective tube 101 located at the front end of the guide rail 4 is clamped by the roller 26. In addition, FIG. 5 (b) shows a state in which the protective tube 101 and the drum 26 are moved rearward (removed side) together with the drum 26 held by the drum 26.

In FIG. 5 (a), a part of the protective tube 101 that contacts the drum 26 is circled by an ellipse of a two-point chain line, and the circled part is further enlarged and displayed. In the enlarged view surrounded by an oval circle, the arrow shows the direction of the force acting on the drum 26. An arc-shaped arrow drawn on the rotation center of the drum 26 indicates a rotation force 30 based on the additional potential energy acting on the swing arm 22. In addition, an arrow extending parallel to the side of the protective tube 101 at a position in contact with the protective tube 101 indicates the frictional force 28 received from the protective tube 101. The other arrows are the component forces 28a and 28b of the friction force 28, respectively, indicating the component force 28a in the rotation direction of the swing arm 22 and the component force 28b in the extension direction of the swing arm 22, respectively.

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

That is, the force with which the drum 26 holds the protective tube 101 increases only when the resistance when the protective tube 101 is conveyed along the electric wire 100 becomes large. In this way, since the holding force of the drum 26 is changed according to need, it is possible to prevent the protection tube 101 from being deformed by being pressed more than necessary.

At the time of removal, the direction of the protective tube 101 moving along the electric wire 100 changes greatly at the position of the front end of the connecting rail 4. When the direction is changed at the front end of the guide rail 4, the sliding contact resistance with the guide rail 4 increases due to the deformation of the protective tube 101. The friction force 28 generated between the protective tube 101 and the drum 26 increases.

However, as described above, since the resistance between the protective tube 101 and the roller 26 also increases with the increased frictional force 28, the force with which the roller 26 is pressed against the protective tube 101 also increases. Accordingly, the protective tube 101 can be reliably moved toward the position shown in FIG. 5 (b) without sliding on the protective tube 101.

In addition, since the upwardly-broken portion 4a is formed at the front side end portion of the guide rail 4, the direction of the protective tube 101 can be changed more smoothly.

In this embodiment, a configuration example is exemplified in which the rotation shaft 26 a of the drum 26 can be moved in and out to a position substantially the same as the end portion of the guide rail 4 at the most advanced position of the base portion 12. However, for example, if it is comprised so that it may advance further in and out, the rocker arm 22 may be pressed by the abutting electric wire 100 in the direction of rotation against an additional potential energy. That is, in addition to the above-mentioned effects, the force acting on the additional potential energy of the rocker arm 22 is further increased, so that the protective tube 101 can be more surely held between the power line 100 and the electric wire 100.

In addition, in FIG. 5, the action when the end of the protective tube 101 is clamped 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 the operation when the protective tube 101 is inserted into the electric wire 100. FIG. 6 (a) shows a state where the protective tube 101 held between the guide rail 4 and the roller 26 is conveyed toward the front end of the guide rail 4. In addition, FIG. 6 (b) shows a state where the roller 26 that has been integrated with the protective tube 101 and advanced has reached the most advanced position. As in FIG. 5, in FIG. 6 (a), a part of the protective tube 101 that contacts the drum 26 is circled by an ellipse of a two-point chain line, and the circled part is enlarged and displayed. As in FIG. 5, the direction of the force acting on the drum 26 is also indicated by arrows in FIG. 6. The arrow extending parallel to the protective tube 101 indicates that the roller 26 is subjected to the frictional force 29 from the protective tube 101. Force generated from friction 29 with protective tube 101 One part functions as a force (component force 29a) in a direction to rotate the swing arm 22 toward the electric wire 100 side. In this way, the force of holding the protective tube 101 is changed during insertion as in the case of removal, and the protective tube 101 can be reliably transported without slipping. The component force 29 b is a component along the extending direction of the swing arm 22.

As described above, FIG. 6 (b) shows a state where the base portion 12 has reached the most advanced position. In the configuration of this embodiment, the rotating shaft 26 a of the drum 26 can reach a region facing the upward disconnection portion 4 a of the guide rail 4. Therefore, it can be conveyed to the end of the protective tube 101 so that the electric wire 100 can be reliably covered.

In this embodiment, an upward disconnection portion 4 a is formed at an end portion in front of the guide rail 4. As a result, the clamping force between the guide rail 4 and the roller 26 at the rearward position of the upward breaking portion 4a is slightly relaxed at the position reaching the upward breaking portion 4a. That is, at the most advanced position of the base portion 12, the force holding the protective tube 101 can be gradually released like a throwing action, and can be smoothly sent toward the electric wire 100 side. When the protective tube 101 is transported to the upward disconnection portion 4 a, the protective tube 101 is then deformed and restored by the resin material to promote the transfer to the electric wire 100. Therefore, it is also possible to prevent the protective tube 101 from being caught and returned together with the drum 26.

In FIG. 6, the operation when the end of the protective tube 101 is clamped and inserted is exemplified, but the same applies to the case where the connected protective tube 101 is continuously inserted.

(Second Embodiment)

Next, a protective tube inserter 1 according to a second embodiment of the present invention will be described with reference to FIG. 7. In this embodiment, the same configuration as the protective tube inserter 1 shown in the first embodiment will be assigned the same reference numerals and described.

FIG. 7 shows the positional relationship between the guide rail 4 and the roller 26 during the conveying operation of the protective tube 101. The outline of the roller 26 is shown by a solid line, and the contact with the guide rail 4 The surface 26b is indicated by a dotted line. At the end on the front side of the guide rail 4, an upward break is formed in the area of area A, and the area B at the front end is formed to be more upwardly and upwardly broken and has a rounded shape than the upward break 4a. .

The upward breaking width of the upward breaking portion 4a is shown by a width W in FIG. 7. Different from the configuration shown in FIG. 3 in the first embodiment, the roller 26 is lifted to a position (a range of width W) that can come into contact with the upward disconnection portion 4a of the guide rail 4 during the conveying operation of the protective tube 101. .

With such a configuration, during the removal described in the first embodiment, a sufficient pressing force can be maintained between the protective tube 101 and the roller 26 even on the upward disconnection portion 4a, and the protective tube 101 can be prevented from floating upward. In addition, the swing arm 22 can be rotated to a position where the roller 26 and the guide rail 4 fully contact each other even at a position on the rear side with respect to the upward breaking portion 4a, so that a sufficient force for holding the protective tube 101 can be generated.

In addition, due to the rotation restriction, the rising position of the drum 26 is suppressed within the range of the upward breaking width W of the upward breaking portion 4a, so that even if the guide tube 4 and the drum 26 do not intervene between the protection tubes 101, During operation, the roller 26 does not suffer much wear.

In addition, as shown in the first embodiment, when the engaging plate 18 (see FIG. 2) is disengaged from the engaging pin 14b, the roller 26 is separated from the guide rail 4. Therefore, even when the idling operation of the protective tube 101 is not provided, Wear of the drum 26 can be prevented.

As described above, according to the present invention, in the area where the guide rail 4 and the electric wire 100 are connected, the drum 26 can surely generate a clamping force. Therefore, the guide rail connected to the extension direction of the electric wire 100 can be set larger than conventionally. 4 configuration angle. Thereby, the width in the insertion direction of the protective tube inserter 1 can be compactly designed, so that the operation becomes easy, and the working efficiency can be expected to be improved.

Moreover, in the said embodiment, although the structure which provided the additional potential energy to the rocker arm 22 using the coil spring 24 was illustrated, the structure which generates additional potential energy using the elastic member, such as a plate spring, is also possible, for example.

In addition, in the above-mentioned embodiment, a configuration is exemplified in which, in the most advanced position of the base 12, together with the first arrangement and the second arrangement, a part of the roller 26 advances in and out of the guide rail 4, but it may be completely The structure is inward and outward from the guide rail. In this case, the more the pressure is received from the electric wire, the more forward the electric wire is, the more force the clamp tube holds between the electric wire and the electric wire can be inserted or removed more reliably.

(Industrial availability)

The protective tube inserter of the present invention is configured to reliably hold the protective tube in the connection area between the electric wire and the guide rail, and has a high effect of preventing the connection part from being detached, so it is useful for a protective tube with a loose connection.

Claims (4)

The utility model relates to a protective tube inserter, which is a relative to an electric wire with a protective pipe formed with a slit in a length direction. The utility model is provided with a guide rail that guides the protective pipe to the electric wire and a base. In order to move back and forth along the guide rail in the insertion direction, and independently of the reciprocating motion, the reversing axis can be reversed forward and backward; the swing arm can be pivotally supported on the base by the pivoting direction, and the swinging end is turned toward The guide rail side is provided with additional rotational potential energy; and the roller is provided with a rotation axis perpendicular to the swinging surface of the swinging arm, and can be installed on the swinging end only in the same direction as the direction of the swinging arm opposing the additional potential energy; At an inclined position where the swinging end overlaps the extension of the reversing axis, the upward rotation of the swinging arm is restricted; the base is configured so that the fulcrum side of the swinging arm is arranged in front of the reversing axis. In the first arrangement, at least a part of the drum can be moved in and out from the guide rail. For example, the protective tube inserter of claim 1, wherein the guide rail is configured to connect the front side at an acute angle from the lower side of the electric wire, and an upward disconnection portion is formed on the lower front side to disconnect upward toward the electric wire side. In the second position after the inversion of the first position and the most advanced position of the base portion, the base portion is located in an area where the rotation axis and the upward breaking portion oppose. For example, the protective tube inserter of claim 1 or 2, wherein the swinging arm is in a rotating area inclined toward the reverse axis side, the roller is in a non-contact state with respect to the guide rail, and can be in contact with the protective tube. The predetermined rotation position of the contact is used as a limit, and the rotation is restricted. For example, the protective tube inserter of claim 2, wherein the swing arm is located in a rotation area inclined toward the reverse axis side, and the predetermined rotation position where the roller can contact the upward disconnection portion of the guide rail is taken as Boundary, restricted rotation.