JP5997628B2 - Protective tube inserter - Google Patents

Description

  The present invention relates to a protective tube inserter for inserting or removing a protective tube that covers the 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. 10 is a perspective view of the protective tube 101 connected.

  The main body 102, the female fitting portion 103, and the male fitting portion 104 constituting the protective tube 101 shown in this figure are formed using an insulating material having elasticity and flexibility. As indicated by phantom lines, 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. With such a material and shape, the electric wire 100 can be covered by opening the slit-shaped opening 107 to accommodate the electric wire 100 therein and 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 opposite end edges that form the slit-shaped opening 107.

  As shown in FIG. 10, 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.

  Normally, 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, and then the tip of the second protective tube 101 is inserted into the electric wire 100. The two protective tubes 101 are connected to each other at 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, an apparatus for inserting the protective tube 101 into the electric wire 100 while being connected will be described.

  FIG. 11 is a plan view of a conventional protective tube insertion device 110. As shown in FIG. 11, the protective tube insertion device 110 includes a pair of rubber rollers 111a and 111b. The rubber rollers 111a and 111b face each other so that the respective rotation shafts 112a and 112b are parallel to each other. Are arranged. The protective tube 101 for covering the electric wire 100 is disposed between the rubber rollers 111a and 111b so that the longitudinal direction of the protective tube 101 and the direction of the rotation shafts 112a and 112b are substantially perpendicular.

  In this way, the protective tube 101 is held between the pair of rubber rollers 111a and 111b facing from the outside. Then, when the pair of rubber rollers 111a and 111b rotate in the directions of arrows 117a and 117b in FIG. 11, the protective tube 101 moves in the direction of the arrow 118 and is sent out to the electric wire 100 side.

  The rotational driving force of these rubber rollers 111a and 111b is transmitted from the driving gears 113a and 113b via the driven gears 114a and 114b. The rubber rollers 111a and 111b are supported by swinging arms 115a and 115b using the rotation shafts 112c and 112d of the driven gears 114a and 114b as supporting shafts. The tips of the swing arms 115a and 115b are connected by a spring 116 that biases the rubber rollers 111a and 111b in a direction in which the rubber rollers 111a and 111b approach each other, that is, in a direction to sandwich the protective tube 101.

  Therefore, it can be sent in a state in which the protective tube 101 is held by a predetermined urging force set by the spring 116, and the outer diameter when the male and female fitting portions 103, 104 (see FIG. 10) and the like pass through. Even with this change, the spring 116 expands and contracts to open and close the gap between the pair of rubber rollers 111a and 111b.

  Such a protective tube insertion device 110 is described in Patent Document 1, for example.

Japanese Patent Laid-Open No. 8-149641

  However, in the conventional protective tube insertion device 110, since the rubber rollers 111a and 111b are always in contact with the protective tube 101 in a rotating state, it is difficult to obtain a sufficient frictional force therebetween. For this reason, the force which clamps the protection pipe | tube 101 with the rubber rollers 111a and 111b must be set large.

  However, the flexible protective tube 101 is easily deformed because the slit-shaped opening 107 is formed in the longitudinal direction as described above. For this reason, in order to stably support the protective tube 101, a sufficient frictional force cannot be obtained unless a clamping force that causes some deformation is applied. Therefore, in order to extend the protective tube 101 while giving such a large clamping force, a high-power drive device is required. For this, a large-scale drive device using a hydraulic device or the like is usually employed, so that the installation is not easy and the cost is increased.

  Further, since the protective tube 101 is drawn out with a clamping force that causes deformation, depending on the temperature range to be used, the fitting part may come off due to insufficient restoration from deformation, or damage may occur due to excessive deformation. There is a fear.

  Furthermore, if this clamping force is set too large, the distance between the opposing rubber rollers 111a and 111b becomes difficult to extend when the male and female fitting portions 103 and 104 connecting the protective tubes 101 are overcome, and the retraction operation is prevented. It becomes difficult.

  As described above, an appropriate frictional force can always be obtained from the rubber rollers 111a and 111b that open and close both the main body portion 102 having a small diameter and the male and female fitting portions 103 and 104 having a large diameter. It is difficult to adjust the clamping force.

  Further, in the above-described protective tube insertion device 110, a pair of rubber rollers 111a and 111b are arranged to face each other in order to stably hold the flexible protective tube 101. For this reason, the weights of the members including the members attached to the respective rubber rollers 111a and 111b are added, which is disadvantageous for remote operation.

  The present invention solves the above-described problem, and a structure that can stably hold a protective tube without causing deformation and can easily cross over connecting portions having different diameters is achieved by a single roller. The purpose is to provide a realized protective tube inserter.

  In order to achieve the above object, a protective tube inserter according to the present invention is a protective tube inserter for inserting a protective tube formed with a slit-like opening extending in the longitudinal direction into an electric wire, and at least a vertical surface on the lower end edge side. And a guide portion that guides the protective tube with the lower edge cut into the slit-shaped opening, and at least two lower edges that are provided on the lower edge side and extend in the insertion direction of the protective tube, A rail part formed at a predetermined interval in the plate thickness direction, a base part provided so as to be able to reciprocate in parallel with the insertion direction, one end swingably attached to the base part, and the other end Is mounted so that it can rotate at a radial position where it can come into contact with the rail portion, and the rotation axis is arranged in a direction substantially perpendicular to the vertical plane. , Swing arm swing by biasing The direction is characterized in that and a roller capable of planetary motion to be freely rotate only in the opposite direction.

  In addition to the above configuration, the protective tube inserter of the present invention is provided with a stopper portion that is attached to the base portion so as to be movable back and forth toward the rail portion, and that can regulate the swing arm portion at a predetermined turning position. And the height of the lifting / lowering part can be held so that a gap is formed between the rail and the roller in a state where the swinging of the swinging arm part is restricted by the stopper part. An elastic holding portion that can be elastically retracted in a direction away from the space and a lifting portion that lifts the lifting portion in a direction to fill the gap and can hold the raised position are provided. .

  In addition to the above configuration, the protective tube inserter according to the present invention is provided such that the rail portion is formed with a protruding portion that protrudes in the thickness direction larger than a predetermined interval at a position higher than the lower end edge. Features.

  As described above, according to the present invention, when the roller comes into contact with the protective tube guided by the rail portion provided at the lower edge of the guide portion from the outside, the two edges formed on the rail portion are protected. Push the inner wall of the tube back toward the roller. Thereby, since the area | region part of the predetermined space | interval between two edges is extended among protection tubes, force is added to the direction where the space | interval of a slit-shaped opening part is expanded. That is, since the pressing force of the slit-like opening that is in contact with the vertical surface portion of the lower end edge of the guide portion is relieved, the sliding friction between the guide portion and the protective tube is reduced.

  Further, according to the present invention, when the lifting part is lifted by the lifting part, the roller can be pressed against the protective tube, and when the lifting part is released and the lifting part is lowered, there is a gap between the rail part and the roller. Since it forms, it can prevent that a roller slidably contacts with a rail part in the state in which the protective tube is not arrange | positioned. That is, the wear of the roller can be prevented.

  In addition, according to the present invention, even when the roller is not pressed against the protective tube, the protective tube is prevented from falling off because the slit-shaped opening of the protective tube is caught by the overhanging portion.

1 is an overall perspective view of a protective tube inserter according to an embodiment of the present invention. It is the side sectional view seen from the direction orthogonal to the insertion direction of a protection pipe about the state where the roller and rail part of the protection pipe insertion device of Drawing 1 separated. It is the side sectional view seen from the direction orthogonal to the insertion direction of a protection tube about the state where the roller and rail part of the protection tube insertion device of Drawing 1 contacted. FIG. 1 shows the positional relationship between the roller and the rail portion of the protective tube inserter shown in FIG. 1 as viewed from the direction in which the protective tube is inserted, (a) shows a state where the rail portion is separated from the roller, and (b) shows a state where the rail portion is a roller. It is the side view which showed the state contact | abutted to the side. It is the expansion perspective view which looked at X part of Drawing 2 from the lower part side. It is the expanded sectional view which looked at the X section of Drawing 2 from the direction orthogonal to the insertion direction of a protection pipe. It is the perspective view which showed the state which has the roller of the protective tube insertion device of FIG. 1 in a neutral position. 1A and 1B show the feeding operation of the protective tube insertion device of FIG. 1, in which FIG. 1A shows a state before the base portion moves, FIG. 1B shows a state in which the base portion has advanced in the insertion direction, and FIG. It is the figure which showed the state which retracted to the side. 1 shows the return operation of the protective tube inserter of FIG. 1, (a) is the state before the base portion is moved, (b) is the state where the base portion has advanced to the opposite side of the insertion direction, and (c) is the base portion being inserted. It is the figure which showed the state which retracted to the direction. It is an external appearance perspective view of the conventional protection tube connected. It is a top view of the conventional protective tube insertion apparatus.

  A protective tube inserter according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows an overall perspective view of a protective tube inserter 1 according to the present embodiment. In FIG. 1, the electric wire 100 into which the protective tube 101 (see FIG. 10) is inserted is indicated by a two-dot chain line.

  First, the structure of the guide part 2 is demonstrated. As shown in FIG. 1, the guide part 2 is formed of a substantially triangular plate-like member, and a substantially entire region including the periphery of the lower end edge is formed of a vertical surface. The lower end edge 2a of the guide part 2 is formed in a straight line. And the rail part 4 is arrange | positioned on the front and back of the guide part 2 along the lower end edge 2a. The rail portion 4 is formed in a substantially trapezoidal cross section so that the width on the lower side is narrow and the width on the upper side (hereinafter referred to as an overhanging portion in the description using FIG. 4) is wide. A guide rod 3 for smoothly introducing the protective tube 101 is extended on the introduction side of the protective tube 101 in the guide portion 2.

  Such apex vicinity of the guide part 2 is connected with the support | pillar 5 so that attachment or detachment is possible. A gripping mechanism 30 for gripping the electric wire 100 is provided above the support column 5. A drive mechanism 31 for inserting the protective tube 101 is provided below the support column 5.

  Next, the drive mechanism 31 will be described. Below the drive mechanism 31 portion, an input unit 24 that receives a rotational force input from a remote control rod or the like is provided. The rotational force input from the input unit 24 is converted into linear motion by the drive mechanism 31. Thereby, the base portion 6 can reciprocate in parallel with the insertion direction 22. Although this conversion mechanism is not described in detail, a crank mechanism or the like can be used.

  From here, it demonstrates using FIG. 2 together. FIG. 2 is a side cross-sectional view of the periphery of the base portion 6 viewed from a direction perpendicular to the insertion direction 22 of the protective tube.

  The base unit 6 is provided with an elevating unit 12 that can be moved up and down. The elevating part 12 is mainly composed of an elevating shaft 12c that can move up and down, a head part 12e, and a spring 12b. The elevating shaft 12c is provided with an eye nut 12f below, and the elevating shaft 12c can be pulled down by remote operation by hooking the eye nut 12f with a hook or the like.

  As can be seen from FIG. 2, the distance between the head portion 12e of the elevating shaft 12c and the base portion 6 is maintained at a distance d1 by the spring 12b.

  On the other hand, one end 8a of the swing arm portion 8 is pivotally supported by the head portion 12e so as to be swingable. The swing arm portion 8 is biased toward the lower surface side of the rail portion 4 by a coil spring 26 (see FIG. 1). The roller 10 is pivotally supported at the swing end (other end) 8b of the swing arm portion 8 so as to be rotatable about the rotation shaft 10a. Accordingly, when the lifting shaft 12c is pulled down, the head 12e can be pulled down against the elastic repulsive force of the spring 12b, so that the roller 10 can be separated from the rail portion 4.

  The height of the head portion 12e can be held by being slightly lifted from the height of the distance d1 by a distance d3 by a cam plate 14 (lifting portion) rotatably supported on the side surface of the base portion 6. The cam plate 14 is formed with a through-hole, and can be easily rotated by a remote control rod having a hook attached as a tip tool.

  In FIG. 2, the cam plate 14 in both the position where the head portion 12e is lifted and the position where the head portion 12e is removed is shown by a two-dot chain line for convenience of explanation. Here, since the configuration other than the cam plate 14 shows a state in which the cam plate 14 is removed from the head 12e, the rail portion 4 and the roller 10 (the lowest center of the surfaces contacting the protective tube 101) are shown. A gap of a distance d2 is formed between the first position and the second position. In this way, if the cam plate 14 is removed from the head portion 12e, the roller 10 can be prevented from coming into direct sliding contact with the rail portion 4, so that the base when the protective tube 101 is not disposed on the guide portion 2 can be prevented. It is possible to suppress the wear of the roller 10 against the unnecessary reciprocation of the part 6. Note that the height defined by the spring 12b may be small as long as a gap is formed at least between the roller 10 and the rail portion 4 and friction does not occur.

  Next, a state where the head 12e is lifted by the cam plate 14 will be described with reference to FIG. 3 also shows the cam plate 14 with a two-dot chain line, as in FIG. However, FIG. 3 shows a state in which the head 12 e is lifted by the cam plate 14. For this reason, a gap of a distance d4 is formed between the upper end of the spring 12b and the head 12e. The roller 10 is in contact with the rail portion 4.

  When the protective tube 101 is arranged in the state of FIG. 3, the swing arm portion 8 can be separated from the rail portion 4 against the bias of the coil spring 26 (see FIG. 1) (retraction of the arrow 41). direction).

  Here, the roller 10 of the protective tube inserter 1 according to the present embodiment employs a one-way rotation type configuration. That is, as shown in FIGS. 2 and 3, the roller 10 is provided in a state in which the roller 10 is capable of planetary movement so that only the rotation in the direction opposite to the turning direction (arrow 42) by the urging of the swing arm unit 8 is possible. It has been.

  Next, FIG. 4 shows a cross-sectional view of the state in which the protective tube 101 is arranged at the lower end edge 2a (see FIG. 1) of the guide portion 2 as viewed from the insertion direction 22.

  FIG. 4A corresponds to the state of FIG. 2 and shows a state in which the cam plate 14 is removed from the head 12e. FIG. 4B corresponds to the state shown in FIG. 3 and shows a state where the head 12 e is lifted by the cam plate 14.

  As described above, the rail portion 4 has a substantially trapezoidal cross-sectional shape. That is, as shown in FIG. 4A, two lower end edges 4a are formed on the lower side of the rail portion 4 with a predetermined interval 4b. Further, an overhanging portion 4 c is formed on the upper side of the lower edge 4 a so as to be wider than the predetermined interval 4 b and project in the thickness direction of the guide portion 2.

  In FIG. 4A, since the head 12 e of the elevating unit 12 is not lifted, the roller 10 and the protective tube 101 are not lifted, and the lower end edge 4 a of the rail unit 4 is separated from the inner wall of the protective tube 101. For this reason, since the force which gives a deformation | transformation is not added to the protection pipe | tube 101, the slit-shaped opening part 107 is a press state so that the plate-shaped part of the guide part 2 may be pinched | interposed from both surfaces.

  On the other hand, in FIG. 4B, since the head 12e of the elevating part 12 is lifted by the cam plate 14, the lower end edge 4a of the rail part 4 is in a pressed state against the inner wall of the lifted protective tube 101. It has become. In other words, the lower side portion of the protective tube 101 is sandwiched between the lower edge 4a and the roller 10 to thereby apply a force in a direction of expanding with a width of a predetermined interval 4b. For this reason, distortion due to the deformation of the lower portion is also transmitted to the slit-shaped opening 107, and a force in a direction away from the plate-shaped portion of the guide portion 2 is generated as shown in FIG. In other words, since the clamping force of the guide part 2 by the slit-shaped opening 107 is reduced, the frictional force between them is reduced. Therefore, the protective tube 101 can be easily fed with a small force corresponding to the reduced frictional force.

  Further, in the configuration according to the present embodiment, since the protective tube 101 and the rail portion 4 are in line contact at the two lower end edges 4a, unlike the surface contact, the sliding friction is small. As described above, since the frictional force that hinders the feeding operation is minimized, even when only one roller 10 is arranged, the inserting operation or the extracting operation can be performed sufficiently stably. In addition, this can greatly reduce the weight compared to the protective tube inserter with multiple rollers as in the conventional configuration, thus improving the stability and safety of remote operation Can be achieved. In addition, when Teflon (trademark) is used for the material of the rail part 4, in addition to being easy to cut, sliding resistance becomes very small, and it is suitable.

  Furthermore, it is excellent in that the number of parts is reduced. That is, by disposing only one roller 10 on the lower edge 2a side of the guide portion 2, the protective tube 101 can be stably held, and at the same time, the sliding between the slit-shaped opening 107 and the guide portion 2 can be maintained. The effect of reducing dynamic friction is also obtained. For this reason, it is not necessary to provide a member such as a roller at a position facing the roller 10.

  Next, FIG. 5 shows a perspective view of the portion X surrounded by the one-dot chain line in FIG. 2 as viewed from below. As can be seen from FIG. 5, a positioning pin 12 d is formed to protrude above the eyenut 12 f in a direction orthogonal to the elevating shaft 12 c. A positioning groove 6 a into which the positioning pin 12 d can be fitted is formed in the cross direction on the lower surface of the base portion 6. Since it is configured in this manner, the rotational position can be determined in increments of 90 degrees by pulling the eyenut 12f once against the urging force of the spring 12b and rotating it around the lifting shaft 12c.

  FIG. 6 shows a side sectional view in which a fitting portion between the positioning pin 12d and the positioning groove 6a is enlarged. Here, the positioning pin 12d and the positioning groove 6a are indicated by dotted lines, respectively.

FIG. 6 corresponds to the state of FIG. That is, as can be seen by referring also to FIG. 2, in this state, the cam plate 14 is detached from the head portion 12 e of the elevating unit 12, and a gap of a distance d <b> 2 is formed between the roller 10 and the rail unit 4. ing. As can be seen from FIG. 6, the positioning groove 6a is formed at a depth of the distance d6, and the positioning pin 12d holds the fitting state while leaving a space of the distance d5 above the positioning groove 6a. That is, as shown in FIG. 2, even when the cam plate 14 is removed from the head 12e and the elevating part 12 is lowered, the positioning is performed so that the positioning pin 12d is deep enough to hold the fitted state. A groove 6a is formed. In the configuration according to the present embodiment, the head 12e is formed by the cam plate 14.
The distance d3 for lifting up, the distance d2 of the gap formed between the roller 10 and the rail portion 4, and the distance d5 in FIG. 6 are set to be substantially the same distance.

  7, the fitting position of the positioning pin 12 d with respect to the positioning groove 6 a shown in FIGS. 5 and 6 is changed, and the swinging surface of the swinging arm portion 8 is perpendicular to the insertion direction 22 of the protective tube 101. An example is shown in which it is evacuated and arranged. Thus, in the configuration according to the present embodiment, the roller 10 can be easily separated from the protective tube 101 by remote operation of the eyenut 12f. As a result, even when it is necessary to pull out the protective tube 101 that has been damaged and greatly deformed, it can be easily handled from a remote location without being caught. As described with reference to FIG. 4, in the configuration of the present embodiment, since the protruding portion 4 c is formed on the rail portion 4, the slit is formed even when the roller 10 is separated from the protective tube 101. The shape-like opening 107 is caught and can be prevented from falling off.

  Next, operation | movement of the protection pipe insertion device 1 is demonstrated using FIG.8 and FIG.9. FIG. 8 shows the operation when the protective tube 101 is inserted into the electric wire. Among these, FIG. 8A shows a state in which the base portion 6 is kept at a position opposite to the insertion direction 22. When the base 6 moves from this state to the insertion direction 22 side, as described with reference to FIGS. 2 and 3, the roller 10 is not allowed to rotate on the side opposite to the arrow 42. The protective tube 101 is fed to the insertion direction 22 side together with the roller 10 whose rotation has stopped.

  FIG. 8B shows a state in which the protective tube 101 is sent in the insertion direction 22 together with the base portion 6 in this way.

  FIG. 8C shows a state where the base portion 6 is returned in the direction opposite to the insertion direction 22 from the state of FIG. As shown in FIG. 8 (c), the roller 10 can rotate in the direction of the arrow 42, so that the protective tube 101 sent in the insertion direction 22 remains on the side surface of the protective tube 101 as it is. It can be rolled and pulled back together with the base portion 6.

  As described above, the protective tube 101 can be smoothly sent out in the insertion direction 22 by repeating the operations shown in FIGS.

  On the other hand, FIG. 9 shows an operation when the protective tube 101 is pulled out from the electric wire 100. In FIG. 9, unlike FIG. 8, a state in which the swing arm portion 8 is disposed so as to be inclined to the opposite side to the insertion direction 22 is shown.

  FIG. 9A shows a state in which the base portion 6 is arranged on the insertion direction 22 side. Then, when the base portion 6 moves in the opposite direction of the insertion direction 22 from this state, that is, in the pulling direction, the roller 10 is allowed to rotate only in the direction of the arrow 42 in FIG. It is sent together with the protective tube 101 in the drawing direction. FIG. 9B shows a state where the base portion 6 is sent in the pulling direction together with the protective tube 101 in this way.

  FIG. 9C shows a state when the base portion 6 is returned in the insertion direction 22 from the state of FIG. 9B. As shown in FIG. 9C, since the roller 10 can rotate in the direction of the arrow 42, the protective tube 101 returned in the drawing direction opposite to the insertion direction 22 is left in that position, The roller 10 is returned to the insertion direction 22 side together with the base portion 6 while rolling on the side surface of the protective tube 101.

As described above, by repeating the operations of FIGS. 9A to 9C, the protective tube 101 can be pulled out smoothly.

  In the above-described embodiment, the rail portion 4 is shown as an example of a member having a substantially trapezoidal cross-sectional shape. However, the rail portion 4 is arranged at least at a predetermined interval with respect to the inside of the protective tube 101. Other configurations may be used as long as they can be contacted by the book edges. For example, flat plates formed at a predetermined interval may be used, and an angle material provided with an overhang portion can be substituted.

  Moreover, in the said embodiment, the space | interval of the two lower end edges 4a of the rail part 4 is made into the example formed in the width | variety of about 1/3 with respect to the area | region which contact | abuts the protection tube 101 of the roller 10. As shown, when the radius of the contact surface of the roller 10 is sufficiently large (including a cylindrical roller), it may be formed wider than the configuration of the present embodiment. Specifically, considering the inner diameter of the target protective tube as a reference, a good effect can be obtained if the width of the lower edge 4a is formed so as to be in the range of 25 to 100% of the inner diameter.

  Moreover, in the said embodiment, although the structure in which the guide part 2 was formed with the plate-shaped member which spreads in the perpendicular direction was shown as an example, the vertical surface is formed at least in the area | region near the lower end edge slidably contacting with a protection pipe. If it is, the whole may not be formed of a plate-like member.

  Moreover, in the said embodiment, the structure which employ | adopted the cam plate 14 was shown as an example as a lifting part which lifts the head 12e of the raising / lowering part 12. As shown in FIG. However, if the remote control is possible, for example, a bolt member is provided on the base 6 so that it can be separated from and attached to the lower surface of the head 12e, and the head 12e is pushed up and fixed by a screw advance / retreat operation. A possible configuration is also acceptable.

  When sending a cylindrical body such as a protective tube whose outer diameter changes in the longitudinal direction, it is possible to prevent catching at a protruding portion with a large diameter, and the cylindrical body can be moved with a small pressing force, for example, It can be used for a protective tube inserter or the like for inserting a protective tube covering the outer periphery of an electric wire installed on a utility pole or the like into the electric wire.

DESCRIPTION OF SYMBOLS 1,110 Protective pipe insertion device 2 Guide part 2a Lower end edge 3 Guide rod 4 Rail part 4a Lower end edge 4b Predetermined distance 4c Overhang part 5 Post 6 Base part 6a Positioning groove 7 Sliding bar 8 Oscillating arm part 8a One end 8b Oscillating End (other end)
8c Turning direction 10 Roller 10a Rotating shaft 12 Elevating part 12a Stopper part 12b Spring (elastic holding part)
12c Elevating shaft 12d Positioning pin 12e Head 12f Eye nut 14 Cam plate (lifting part)
22 Insertion direction 24 Input part 26 Coil spring 28 Upper grip part 29 Lower grip part 30 Grip mechanism 30a Operation lever 31 Drive mechanism 41, 42 Arrow 100 Electric wire 101 Protective tube 104 Male fitting part 107 Slit-shaped opening d1 , D2, d3, d4, d5 distance

Claims (2)

A protective tube inserter for inserting a protective tube formed with a slit-like opening extending in the longitudinal direction into an electric wire,
A guide part that guides the protective tube in a state in which a vertical surface is formed at least on the lower edge side, and the lower edge is cut into the slit-shaped opening;
A rail part provided on the lower edge side and extending at least two lower edges extending in the insertion direction of the protective tube at a predetermined interval in the thickness direction of the lower edge;
A base portion provided so as to be capable of reciprocating in parallel with the insertion direction;
A swing arm part having one end pivotably attached to the base part and the other end pivotally biased toward the rail part side;
It is attached so as to be able to rotate at a radial position where it can contact the rail part, and its rotation axis is arranged in a direction substantially perpendicular to the vertical surface, and in a direction opposite to the turning direction of the swinging arm part by biasing With a roller capable of planetary motion that can only rotate ,
In the base part,
An elevating part, which is attached so as to be capable of moving back and forth toward the rail part, and has a stopper part capable of regulating the swing arm part at a predetermined turning position;
The height of the elevating part can be held so that a gap is formed between the roller and the rail part in a state where the swinging of the swing arm part is regulated by the stopper part, and the rail An elastic holding portion that can be elastically retracted in a direction away from the portion;
Lifting the lifting part in the direction of filling the gap, and a lifting part that can hold the lifted position,
A protective tube inserter comprising: In the rail part,
2. The protective tube insertion device according to claim 1, wherein an overhanging portion that protrudes in the thickness direction larger than the predetermined interval is formed at a position higher than the lower end edge .