JP2014135823A - Protective pipe insertion machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective pipe insertion machine which can smoothly get over a protrusion with a simple and light-weight configuration even when diameters in a longer direction are not uniform, and protrusions or the like are formed.SOLUTION: Advancement and retraction rollers 10a, 10b for feeding a protective pipe 101 are connected to a hinge piece 9b of a hinge part 9 with spring. The hinge part 9 with spring is energized by a spring 9c so as to close a guide plate 2 side. A hinge shaft 9a of the hinge part 9 with spring is erected on a rotation plate 11 rotatably provided in a base part 8. The rotation plate 11 can be rotationally operated by an eye bolt 12, and its rotational position can be fixed with a roller fixing part 13 so that any of the advancement and retraction rollers 10a, 10b can come into contact with the protective pipe 101. The base part 8 is attached on a rail 7 so as to reciprocally move in the shaft direction of the protective pipe 101. The advancement roller 10a can be rotated only to the retraction side with respect to the protective pipe 101, and the retraction roller 10b can be rotated only to the advancement side.

Description

  The present invention relates to a protective tube insertion machine for inserting or extracting 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. 11 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.

  Further, as shown in FIG. 11, 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. 12 is a plan view of a conventional protective tube insertion device 110.

  As shown in FIG. 12, the protective tube insertion device 110 includes a pair of rubber rollers 111a and 111b, and these 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. 12, 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. 11) 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 driving device using a hydraulic device or the like is usually employed, so that 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 crossed, and the retracting 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.

  The present invention solves the above-mentioned problems, and even when the diameter is not uniform in the longitudinal direction and the projections are formed, the protective tube can easily get over the projections with a simple and lightweight configuration. The purpose is to provide an insertion machine.

  In order to achieve the above object, a protective tube insertion machine according to the present invention includes a base portion that is provided so as to reciprocate in parallel with a longitudinal direction in which a protective tube having a slit-like incision portion extending in a longitudinal direction is formed. A first roller that is unidirectionally rotatable and is rotatable in the case of relative movement rearward on the contacted protective tube, and forwardly moved on the contacted protective tube forward. A second roller that is rotatable in the case of relative movement, and a first roller on the front side of two hinge pieces that are provided so as to be integrally movable with the base portion and are connected by a hinge shaft that is vertically arranged with respect to the front-rear direction. A second roller is attached to the rear side, and a hinged portion with a spring having a spring that biases the protective tube side to close, and a base portion, and one of the first and second rollers contacts the protective tube. Arranged in a rotating position where contact is possible, and biased by a spring Anti to, characterized in that and a roller fixing unit capable of fixing the other side.

  In addition to the above-described configuration, the protective tube insertion machine of the present invention includes a first and a second hinge so that the hinge shaft is erected substantially vertically and the spring-loaded hinge part has a predetermined deployment angle against biasing. Two engaging projections that can be engaged with the respective shafts of the second roller are formed at the end edges, and a rotating plate that is rotatably attached to the base portion about the hinge shaft is provided.

  In addition to the above-described configuration, the protective tube insertion machine of the present invention is located on the opposite side of the electric wire with the protective tube in the vicinity of the intersection of the electric wire and the protective tube, and is configured by the protective tube and the electric wire. Arranged so that the oscillating surface is parallel to the plane, and the oscillating track of the oscillating end partly overlaps the passage area of the protective tube, oscillating the oscillating position substantially perpendicular to the protective tube Auxiliary swing comprising a swing piece elastically swingable as a center, and a free rotation roller having a rotation axis orthogonal to the swing surface and attached to the swing end so as to freely rotate. A moving part is provided.

  In addition to the above configuration, the protective tube insertion machine of the present invention is composed of a plate-like body that is inserted into the incision portion and guides the protective tube, and gradually becomes wider from the receiving end of the protective tube toward the front side. In addition, a guide plate that is curved so as to be concave on the front side is provided.

  In addition to the above configuration, the protective tube insertion machine of the present invention is characterized in that a through hole is formed in the guide plate in a region where the inside of the incision portion of the protective tube is in sliding contact.

  In addition to the above configuration, the protective tube insertion machine of the present invention is provided at the upper gripping portion for holding the upper surface side of the electric wire, and at the upper edge of the guide plate facing the upper gripping portion. A lower gripping portion that holds the guide plate, a pedestal fixed to the side of the guide plate, a movable member connected to the pedestal via an extendable support shaft, and fixed to the upper gripping portion, and the pedestal and the movable member And an urging member that urges the movable member upward so as to maintain a predetermined height with respect to the pedestal, and a guide plate, and is substantially perpendicular to the direction in which the upper gripping portion extends. The elevating part arranged so as to be able to move up and down in a direction, and formed in a staircase shape so as to match any stepped surface within the elevating region of the elevating part and in a plane substantially perpendicular to the elevating direction of the elevating part And a step portion attached to the movable member so as to be movable.

As described above, according to the present invention, when the second roller is fixed by the roller fixing portion, the first roller is pressed against the protective tube by the bias of the spring. When the base portion moves forward in this state, the protective tube is sent forward by friction with the first roller, which cannot rotate when moving forward with respect to the protective tube. In addition, when the base portion retreats in the same state, the first roller can rotate on the protection tube, and therefore retreats together with the base portion while leaving the protection tube at the same position (front position).

  On the other hand, when the first roller is fixed by the roller fixing portion, the second roller is pressed against the protective tube by the bias of the spring. When the base portion retreats in this state, the protective tube is sent rearward due to friction with the second roller, which cannot be rotated when moving backward with respect to the protective tube. Further, when the base portion moves forward in the same state, the second roller can rotate on the protective tube, so that it moves forward together with the base portion while leaving the protective tube in the same position (rear position).

  For this reason, the protection tube can be efficiently inserted into or removed from the electric wire simply by selecting the first roller and the second roller to be brought into contact with the protection tube and reciprocating the base portion. Further, since the first roller and the second roller are urged toward the protective tube by the spring, it is possible to easily get over the step of the protective tube by retreating against the urging during rolling. .

  In addition, according to the present invention, since the hinge part with the spring can be rotated around the hinge axis while maintaining a predetermined deployment angle, the first roller can be simply rotated by rotating the rotating plate or the member connected to the rotating plate. And the fixed state with respect to the fixing | fixed part of a 2nd roller can be switched.

  For this reason, if a connection member suitable for remote operation is provided only on the rotating plate, there is no need to individually operate the first roller or the second roller when switching between protective tube insertion and extraction. It becomes easy and workability is improved.

  According to the present invention, when the protective tube approaches the crossing position with the electric wire at the time of insertion, it comes into contact with the free rotation roller of the auxiliary swinging portion from the rear side. As a result, the auxiliary swinging portion is tilted in the forward direction, and the protective tube is pushed up by the urging force to return to the swing center position. Thereby, it is possible to assist the insertion of the protective tube into the electric wire and smoothly perform the forward movement. Further, when the base portion is retracted, the posture inclined in the forward direction is maintained, and the base portion is stretched diagonally forward so as not to be dragged by the reverse first roller. Thereby, it is possible to cause the protective tube to follow only the forward movement of the first roller in the forward and backward movement, and to perform the insertion operation reliably without waste.

  On the other hand, when the protective tube approaches the crossing position with the electric wire at the time of extraction, it comes into contact with the free rotating roller of the auxiliary swinging portion from the front side. Accordingly, the auxiliary swinging portion is inclined in the backward direction, and the protective tube can be slid on the free rotating roller, and sliding resistance with the protective tube can be reduced. Further, when the base portion moves forward, the posture tilted in the backward direction is maintained, and the base portion is stretched obliquely rearward so as not to be dragged by the moving second roller. As a result, of the back and forth movement of the second roller, the protective tube can be made to follow only the backward movement, and the extraction operation can be performed reliably without waste.

  Further, according to the present invention, when the protective tube entering in the direction of insertion into the electric wire hits the edge of the guide plate at the end other than the incision, the end of the protective tube is formed by bending the guide plate. Ride on the edge and lift up gradually. And since the space | interval of an incision part spreads while the edge part of a protective tube lifts, the position of an incision part is automatically performed with a guide plate. In other words, the protective tube moves along with the axial rotation so that the rotation position of the incision portion approaches the edge of the guide plate, and proceeds while the position is corrected, so that the rotation tube finally rotates until the position of the incision portion matches the position of the guide plate. Then, the protective tube is inserted through the guide plate. As a result, the protective tube can be smoothly inserted into the guide plate while automatically aligning the guide plate and the incised portion.

According to the present invention, since the through hole is formed in the region of the guide plate where the inside of the incision portion of the protective tube is in sliding contact, the first roller or the second roller is pressed against the protective tube by the bias of the spring. Even in this case, the sliding frictional force between the guide plate and the protective tube does not increase. As a result, the protective tube can be sent smoothly.

  According to the present invention, the lower gripping portion is fixed integrally with the elevating portion via the guide plate and the pedestal, while the upper gripping portion is fixed integrally with the movable member. However, since the movable member and the pedestal are connected by the support shaft and the urging member that can be expanded and contracted, the distance between them changes. For this reason, when the elevating part descends and comes into contact with the stepped part attached to the movable member, the upper gripping part is pushed down by the lifting part together with the stepped part, and the distance from the lower gripping part is reduced. Since the staircase surface matched to the raising / lowering range of a raising / lowering part can be selected by the movement of a staircase part, it becomes possible to change the pushing down width of an upper grip part with respect to the fall width of the same raising / lowering part. Thereby, since the grip width between an upper side grip part and a lower side grip part can be adjusted with respect to the electric wire from which an outer diameter differs, versatility spreads.

1 is an overall perspective view of a protective tube insertion machine according to an embodiment of the present invention. It is a top view of the rotating plate of the protection tube insertion machine of FIG. It is a top view of the roller fixing | fixed part of the protective tube insertion machine of FIG. The state around the roller part of the protective tube insertion machine of FIG. 1 is shown, (a) is in the neutral position, (b) is the state where the advance roller is in contact with the protective tube, and (c) is It is operation | movement explanatory drawing which showed the state which the reverse roller contact | abutted to the protective tube. 1 shows a state in which the advance roller of the protective tube insertion machine in FIG. 1 is in contact with the protective tube, (a) shows a state in which the base portion has moved forward, and (b) shows a state in which the base portion has moved backward. It is a top view of operation | movement description. FIG. 5 is a side view of the state of FIG. 5, wherein (a) is a state in which the base portion is moved forward, and (b) is a side view for explaining the operation in a state where the base portion is moved backward. 1 shows a state in which the reverse roller of the protective tube insertion machine in FIG. 1 is in contact with the protective tube, (a) shows a state in which the base portion has moved backward, and (b) shows a state in which the base portion has moved forward. It is a top view of operation | movement description. FIGS. 7A and 7B show the state of FIG. 7 in a side view, in which FIG. 7A is a side view illustrating the operation, and FIG. 7B is a side view illustrating the state in which the base portion is moved forward. 1 shows the periphery of the upper gripping portion of the protective tube insertion machine of FIG. 1, wherein (a) is a state where the upper gripping portion is raised, and (b) is an operation explanatory diagram showing a state where the upper gripping portion is lowered. . It is a perspective view of the thread part of a protection pipe insertion machine. 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 insertion machine 1 according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an overall perspective view of a protective tube insertion machine 1 according to the present embodiment. In FIG. 1, the protective tube 101 and the electric wire 100 into which the protective tube 101 is inserted are indicated by a two-dot chain line.

  First, the configuration around the guide plate will be described. In the protection tube insertion machine 1, a guide plate 2 that is inserted between the incision portions 101a of the protection tube 101 and guides the protection tube 101 is formed so as to spread in a substantially vertical direction. On the side (rear side) of the guide plate 2 that receives the protective tube 101, a guide rod 3 that extends through the protective tube 101 and guides the protective tube 101 is extended.

A curved edge 2b is formed on the receiving side of the guide plate 2 so as to be smoothly connected to the guide rod 3 and to have a concave shape toward the front side in the insertion direction. As a result, the guide rod 3
Even when the incision portion 101a is sent without being positioned with respect to the guide plate 2, the protective tube 101 sent up is bent while moving forward while sliding on the bent edge 2b. Positioning is performed while the incision 101a is widened by the edge 2b. And the guide plate 2 can enter smoothly into the incision part 101a.

  Further, a long hole 2c is formed in the guide plate 2 in a region through which the incision 101a of the protective tube 101 passes while sliding. As a result, the area in which the inside of the closed incision 101a slides on the guide plate 2 is reduced, so that the friction between the guide plate 2 and the protective tube 101 is reduced, and the protective tube 101 is smoothly fed. In the configuration according to the present embodiment, the long hole 2c is formed in a moving range of a pair of rollers 10 (described later) arranged to face each other with the protective tube 101 in between. For this reason, when sandwiched between the pair of rollers 10, the incision portion 101a of the protective tube 101 is closed by the long hole 2c, and the protective tube 101 and the long hole 2c are engaged. That is, the long hole 2c reduces the sliding friction between the guide plate 2 and the protective tube 101 and also acts as a guide for preventing the displacement of the protective tube 101 in the vertical direction. The protection tube 101 can be sent.

  As shown in FIG. 1, the lower surface of the electric wire 100 into which the protective tube 101 is inserted comes into contact with the upper end edge 2 a of the guide plate 2. The upper edge 2a is provided with lower gripping portions 16a and 16b on the front side and the rear side, respectively, so that the abutting electric wire 100 can be stably held. An upper gripping portion 15 that holds the upper side of the electric wire 100 is provided above the lower gripping portions 16a and 16b with a space therebetween. The upper gripping portion 15 is pressed downward by an elevating mechanism described in detail later, and the electric wire 100 can be gripped between the lower gripping portions 16a and 16b. Further, the protective tube 101 is guided at an acute angle with respect to the electric wire 100 and is smoothly inserted.

  Next, the drive mechanism arranged below the guide plate 2 will be described. Support frames 4 are fixed to both side surfaces of the guide plate 2, and a drive unit 5 is connected to the lower side of the support frame 4. The drive unit 5 is provided with an input unit 6 to which a remote control rod (not shown) is connected facing downward. The rotational motion based on the rotational force input from the input unit 6 is converted into the reciprocating motion of the base unit 8 along the protective tube 101. Although this conversion mechanism is not shown in FIG. 1, it can be configured by a combination of a bevel gear and a crank mechanism, for example.

  A rail 7 is disposed in the drive unit 5 along the direction in which the protective tube 101 is inserted, and the above-described base unit 8 is disposed so as to be able to reciprocate on the rail 7.

  On the base part 8, a hinged part 9 with a spring is provided. The hinge shaft 9 a of the hinge part 9 with the spring is erected in a direction perpendicular to the rail 7, that is, a direction perpendicular to the movement direction of the base part 8. The forward roller 10a and the backward roller 10b (the two are collectively referred to as the roller 10) are attached to the hinge piece 9b connected by the hinge shaft 9a. In the hinged portion 9 with a spring, the spring 9c is disposed so as to engage with the rotating shaft 10c of the forward roller 10a (first roller) and the lower end of the rotating shaft 10d of the backward roller 10b (second roller). . Thereby, the hinge piece 9b is urged | biased so that the side which faces the protection tube 101 of the hinge part 9 with a spring may be closed.

  Among the rollers 10, the forward roller 10 a disposed on the front side is used when the protective tube 101 is inserted into the electric wire 100, and the backward roller 10 b disposed on the rear side is used when the protective tube 101 is pulled out from the electric wire 100. Used for.

The forward roller 10a and the backward roller 10b described above and the hinged portion 9 with a spring for supporting them are placed on the rotating plate 11, and are provided so that the shaft can be integrally rotated about the hinge shaft 9a. It has been. And this rotation position can be changed by operation of the eyebolt 12 provided below and coaxial with the hinge shaft 9a. In FIG. 1, a state in which the forward roller 10 a is inclined toward the insertion region side of the protective tube 101 is shown. Here, the shape of the rotating plate 11 is shown in FIG.

  In FIG. 2, the rotating plate 11 is represented by a solid line, and the hinge shaft 9 a and the rotating shafts 10 c and 10 d of the roller 10 are represented by a two-dot chain line, and the positional relationship between them is shown. As can be seen from FIG. 2, the rotating plate 11 is formed with a through hole 11 a through which the hinge shaft 9 a is inserted. As described above, the hinged portion 9 with the spring is biased by the spring 9c so as to close the side facing the protective tube 101. Due to this urging, the forward roller 10a and the reverse roller 10b which are about to rotate toward the protective tube 101 around the hinge shaft 9a are engaged with the engaging protrusions 11b and 11c formed on the edge of the rotary plate 11. Thus, the rotation toward the protective tube 101 is restricted in a state where the respective rotary shafts 10c and 10d are engaged. In the present embodiment, the engagement protrusions 11b and 11c are formed at positions where the hinged part 9 with the spring has a deployment angle (predetermined deployment angle) of approximately 180 degrees.

  As can be seen from FIG. 2, the rotation shafts 10 c and 10 d of the roller 10 whose rotation to the protection tube 101 side is restricted by the engagement protrusions 11 b and 11 c are allowed to rotate to the side away from the protection tube 101. Has been. For this reason, when the rotating plate 11 rotates, the forward roller 10a or the backward roller 10b that contacts the protective tube 101 can be rotated from the protective tube 101 to the side of retraction (in the direction of the arrow 30 or 31). it can.

  Here, referring back to FIG. 1, a roller fixing portion 13 is provided below the rotating plate 11 in order to fix the rotation angle of the rotating plate 11. Next, the shape of the roller fixing portion 13 is shown in FIG.

  The roller fixing portion 13 is a plate-like member having notches 13a and 13b formed in the front-rear direction. In FIG. 3, the rotating shaft 10c of the forward roller 10a and the rotating shaft 10d of the backward roller 10b that are in the positional relationship shown in FIG. 1 are indicated by a two-dot chain line. As can be seen from FIG. 3, the rotating shaft 10 d of the reverse roller 10 b is in a fitted state with the notch 13 b of the roller fixing portion 13. In this way, the rotational position of the rotating plate 11 is fixed, and the advance roller 10a can be disposed so as to enter the region through which the protective tube 101 passes. Conversely, when the rotating plate 11 is rotated and the rotating shaft 10c of the forward roller 10a is fitted into the notch 13a, the backward roller 10b can be brought into contact with the side surface of the protective tube 101.

  Although not described in detail here, as a mechanism for fitting the rotary shafts 10c and 10d having outer diameters substantially the same as the inner diameters of the notches 13a and 13b into the notches 13a and 13b, for example, a rotating plate is used. The structure etc. which can get over the opening side of the notch 13a or 13b by pulling down (or pulling up) 11 to the hinge axis | shaft 9a direction are employ | adopted.

  Next, the mutual relationship among the hinge part 9 with the spring, the forward roller 10a, the reverse roller 10b, the rotating plate 11 and the roller fixing part 13 will be described with reference to FIG. FIG. 4 is an operation explanatory view showing a state around the roller 10 of the protective tube inserting machine 1. In FIG. 4, the position of the side surface of the protective tube 101 is represented by a two-dot chain line.

FIG. 4A shows a state where neither the forward roller 10a nor the backward roller 10b is fixed to the roller fixing portion 13. In this way, by engaging the rotation shafts 10c and 10d of the roller 10 with the engagement protrusions 11b and 11c, the hinged portion 9 with the spring can be held in a substantially linear shape, so that the rotation plate 11 is rotated. The hinged portion 9 with spring can be arranged substantially parallel to the protective tube 101. That is, in the protective tube insertion machine 1 according to the present embodiment, a neutral state can be formed so that the protective tube 101 does not interfere with either the forward roller 10a or the reverse roller 10b. Thus, the protective tube 101 can be freely moved back and forth.

  FIG. 4B shows a state in which the rotating shaft 10 d of the retreating roller 10 b is fixed to the roller fixing portion 13. In FIG. 4B, the forward roller 10a is in the rotational position when the protective tube 101 is not present. Accordingly, a part of the forward roller 10a is in a state of entering the passage region of the protective tube 101. In this state, as described above, the advance roller 10a can swing in the direction away from the protective tube 101 (the direction of the arrow 32) against the bias of the spring 9c. As a result, when the protective tube 101 is sent to the position indicated by the two-dot chain line, an appropriate pressing force acts on the side surface of the protective tube 101 from the retracted advance roller 10a. The forward-traveling roller 10a in the pressed state can be retracted flexibly when getting over the male-female fitting portion where the outer diameter of the protective tube 101 changes greatly.

  FIG. 4C shows a state in which the rotating shaft 10 c of the advance roller 10 a is fixed to the roller fixing portion 13. Since the advancing roller 10a and the retreating roller 10b are configured symmetrically with respect to the position of the hinge shaft 9a, the retreating roller 10b moves toward the protective tube 101 as in the state of FIG. 4B. In the biased state, it can swing in a direction away from the protective tube 101 against the bias.

  Subsequently, the feeding operation of the protective tube 101 will be described with reference to FIGS. 5 and 6. Among these, first, a forward feeding operation, that is, an insertion operation into the electric wire 100 will be described with reference to FIGS. 5 and 6. FIG. 5 is a plan view showing a configuration around the roller 10 for the insertion operation of the protective tube 101. FIG. 6 is a side view showing the configuration around the roller 10 for the insertion operation of the protective tube 101.

  FIG. 5A shows a state when the base portion 8 moves forward. In the present embodiment, the forward roller 10a is a one-way rotation type (reverse rotation prevention structure), and is configured to be able to roll on the protective tube 101 that abuts only when retreating. Accordingly, as shown in FIG. 5A, when the base portion 8 moves forward, the advance roller 10 a that contacts the protection tube 101 cannot roll on the protection tube 101, and therefore the advance roller 10 a and the protection tube 101. Friction occurs between the two. As a result, the protective tube 101 sandwiched between the advance rollers 10 a advances together with the advance of the base portion 8.

  In this case, as described with reference to FIG. 4, a force is applied to the advance roller 10a in the arc direction (protective tube 101 side) centering on the hinge shaft 9a based on the biasing force of the spring 9c. On the other hand, the frictional force generated between the protective tube 101 acts in the backward direction so as to pull back the forward-traveling roller 10a. Therefore, this frictional force contributes to the tilting force of the hinge piece 9b (see FIG. 1) heading toward the protective tube 101, and the tilting force that presses the forward roller 10a against the protective tube 101 increases. In the configuration of FIG. 5, since the advance roller 10a is disposed opposite to the protective tube 101, the force for holding the protective tube 101 by the two advance rollers 10a increases.

  Thus, according to the configuration of the protective tube insertion machine 1 according to the present embodiment, an increase in the load (frictional force) acting in the feed direction is reflected in an increase in the holding force of the protective tube 101 by the roller 10, It is possible to generate a clamping force as required. In other words, it is not always necessary to generate a strong clamping force, and the protection tube 101 can be reliably held and sent with a minimum clamping force. This also leads to minimizing damage due to deformation of the protective tube 101 or the like.

On the other hand, FIG. 5B shows the movement when the base portion 8 moves backward. At this time, the advance roller 10a can roll on the protective tube 101 in the directions of arrows 33 and 34. Therefore, the protective tube 101 does not follow the backward movement of the base portion 8 and remains in the same position.

  Next, the same movement as in FIG. 5 will be described from the side direction with reference to FIG.

  6A shows the movement when the base portion 8 moves forward, and FIG. 6B shows the movement when the base portion 8 moves backward. As can be seen from FIG. 6, an auxiliary rocking portion 14 is provided on the front side of the protective tube inserting machine 1.

  Here, with reference to FIG. 1, it can be seen that the auxiliary oscillating portion 14 is provided in the vicinity of the crossing position of the electric wire 100 and the protective tube 101. The auxiliary oscillating portion 14 is attached so that the oscillating piece 14a can oscillate about the oscillating support shaft 14b. A coil spring 14c is connected to the lower end of the swing piece 14a so that the swing piece 14a can swing elastically around a position substantially orthogonal to the protective tube 101. Yes. In addition, a freely rotatable roller 14d (free rotating roller) having a rotating shaft arranged in a direction orthogonal to the oscillating surface is arranged at the upper oscillating end.

  Returning to FIG. 6, it can be seen that the swinging track 14 e (FIG. 6B) of the auxiliary swinging unit 14 intersects the passage region of the protective tube 101. Therefore, when the protective tube 101 is sent from the rear, the swing end of the auxiliary swing portion 14 tilts in the forward direction. Thereby, the protective tube 101 is smoothly fed on the roller 14d.

  By the way, since the auxiliary swinging portion 14 has a restoring force acting in a direction orthogonal to the protective tube 101 by urging, the auxiliary swinging portion 14 guides the protective tube 101 to slide and pushes the protective tube 101 upward. Works.

  Normally, when the protective tube 101 is inserted into the electric wire 100, the incision 101a above the protective tube 101 is opened, so that the feed load accompanying the deformation increases. However, in the protective tube insertion machine 1 according to the present embodiment, Then, the lifting operation of the protective tube 101 by the auxiliary swinging portion 14 works supplementarily, and the protective tube 101 can be easily pushed into the electric wire 100 against the load.

  FIG. 6B shows the movement when the base portion 8 moves backward. At this time, as shown in FIG. 5 (b), the advance roller 10a in contact with the protective tube 101 can roll on the protective tube 101, so that it smoothly moves back without the inserted protective tube 101. can do.

  In addition, during the backward movement, as shown in FIG. 6B, a force acts in a direction (arrow 35) in which the auxiliary swinging portion 14 is stretched against the protective tube 101. For this reason, it is possible to reliably stop the protective tube 101 during the backward movement of the base portion 8, and it is possible to prevent a decrease in the efficiency of the feeding operation.

  Next, the feeding operation of the protective tube 101 in the reverse direction, that is, the extracting operation from the electric wire 100 will be described with reference to FIGS. 7 and 8.

  FIG. 7 is a plan view showing a configuration around the roller 10 in the operation of extracting the protective tube 101. FIG. 8 is a side view showing the configuration around the roller 10 for the operation of extracting the protective tube 101.

First, FIG. 7A shows the movement when the base portion 8 moves backward. Here, since the rotating shaft 10 c of the forward roller 10 a is fixed to the roller fixing portion 13, the backward roller 10 b is in contact with the side surface of the protective tube 101.

  In the present embodiment, the reverse roller 10b is a one-way rotation type (reverse rotation prevention structure), similarly to the forward roller 10a. However, the permissible rotation direction is opposite to that of the forward roller 10a, and is configured to be able to roll on the protective tube 101 only when moving forward.

  Therefore, as shown in FIG. 7A, when the base portion 8 is retracted, the retraction roller 10b that is in contact with the protection tube 101 cannot roll on the protection tube 101, and thus friction occurs. Thereby, with the backward movement of the base portion 8, the protective tube 101 sandwiched between the backward movement rollers 10b moves integrally in the backward direction.

  Similarly to the case of FIG. 5A, the retreating roller 10b is pressed against the side surface of the protective tube 101 by the bias of the spring 9c (see FIG. 4). Then, a frictional force acts in the forward direction from the protective tube 101 against the backward movement roller 10b. As a result, when the frictional force increases during retraction, the force for tilting the hinge piece 9b (see FIG. 1) to the protective tube 101 side increases due to the contribution of the frictional force, so that the clamping force also increases.

  That is, an increase in the load acting in the feeding direction is reflected in the clamping force of the reverse roller 10b even in the backward direction, so that it is not always necessary to apply a large clamping force.

  Next, FIG.7 (b) has shown the motion when the base part 8 advances. At this time, the reverse roller 10b can roll on the protective tube 101 (directions of arrows 36 and 37). Therefore, the protective tube 101 does not follow the forward movement of the base portion 8 and can hold the same position.

  Subsequently, the same movement will be described from the side surface direction with reference to FIG. FIG. 8A shows the movement when the base portion 8 moves backward. As described above with reference to FIG. 6, the auxiliary swinging portion 14 is provided on the forward side of the protective tube inserting machine 1. Unlike the case of FIG. 6, the auxiliary swinging portion 14 abuts against the rear end portion of the protective tube 101 when entering (retracting) from the front side into the protective tube inserting machine 1. The moving end tilts backward.

  For this reason, similarly to FIG. 6A, for the feeding operation of the protective tube 101 shown in FIG. 8A, the freely rotating roller 14d slides, so that the feeding operation becomes smooth.

  FIG. 8B shows the movement when the base portion 8 moves forward. At this time, as shown in FIG. 7 (b), the retreating roller 10b in contact with the protective tube 101 can roll on the protective tube 101, so that it smoothly advances without the inserted protective tube 101. can do. Moreover, at the time of forward movement, as shown in FIG. 8B, the auxiliary swinging portion 14 is stretched in the direction of the arrow 38, so that the reaction from the roller 14d acts on the protective tube 101. For this reason, it is possible to reliably stop the protective tube 101 with respect to the forward movement of the base portion 8, and it is possible to prevent the efficiency of the extraction operation from being lowered.

  Next, the lifting mechanism touched above will be described with reference to FIG. 9 showing the structure around the upper gripping portion 15 and the lower gripping portions 16a and 16b for gripping the electric wire 100.

  In FIG. 9A, the upper gripping portion 15 is lifted with respect to the lower gripping portions 16 a and 16 b provided on the upper end edge 2 a of the guide plate 2, and the protective tube insertion machine 1 is set on the electric wire 100. The previous state is shown. Further, FIG. 9B shows a state where the distance between the upper gripping portion 15 and the lower gripping portions 16a and 16b is reduced and the electric wire 100 is gripped. The electric wire 100 is indicated by a two-dot chain line.

  As can be seen from FIG. 9, a pedestal 17 is fixed to the side surface of the guide plate 2. Further, an inverted L-shaped stage 19 is fixed to the pedestal 17. On this stage 19, a swing arm 21 (elevating part) that can be swung down and raised by operating the lever 20 is attached. In the state where the lever 20 in FIG. 9A is lifted and the swing arm 21 is swung up, the upper gripping portion 15 is raised. On the other hand, in the state where the lever 20 of FIG. 9B is pulled down, the swing arm 21 is swung down, and the upper gripping portion 15 is lowered.

  A bar-shaped member 21a (elevating part) is attached to the swing arm 21 in a T-shape at the swing end, and the lower end of the bar-shaped member 21a is in contact with the spiral staircase section 22 having a spiral staircase shape. The threaded portion 22 has a shape as shown in FIG. The protective tube insertion machine 1 according to the present embodiment is provided with a threaded portion 22 formed with a three-step staircase surface 22a. The threaded portion 22 is formed with a through-hole that can be pivotally supported by a bolt at a spiral center position so as to be rotatable. As can be seen with reference to FIG. 9, the threaded portion 22 is pivotally supported on the upper surface of the movable member 18 fixed integrally with the upper gripping portion 15.

  The threaded portion 22 is provided in an ascending / descending region at the lower end of the rod-shaped member 21 a attached to the swing arm 21. When the swing arm 21 is swung down, the lower end of the rod-shaped member 21 a is a step of the threaded portion 22. It arrange | positions so that it may be pressed on the surface 22a.

  On the other hand, the movable member 18 is supported by a stretchable support 23 interposed between the base 17 and a spring 24 is externally fitted to the support 23. The movable member 18 is urged upward by the spring 24, and is kept at a predetermined distance from the base 17. This predetermined interval needs to be set to such an extent that at least the electric wire 100 can be inserted between the upper gripping portion 15 and the lower gripping portions 16a and 16b in a state where no external force is applied.

  With this configuration, when a downward force is applied from the rod-shaped member 21 a to the movable member 18 via the screw floor portion 22, the upper gripping portion 15 is moved together with the movable member 18 against the elastic force of the spring 24. Can be pushed down.

  That is, by rotating the threaded portion 22 axially, the stepped surface 22a having an appropriate height is selected in accordance with the outer diameter of the target electric wire 100, and the rod-shaped member 21a of the swing arm 21 is moved down. In addition, when the swing arm 21 is lowered, the upper gripping portion 15 is pushed down according to the height of the step surface 22a, and the electric wire 100 is gripped between the lower gripping portions 16a and 16b. It becomes possible to do.

  As described above, when the rotational position of the threaded portion 22 is matched with the diameter of the target electric wire 100 in advance, it can be easily attached to and detached from the electric wire 100 only by remotely operating the lever 20.

  In the above-described embodiment, the configuration in which two sets of the roller 10 including the forward roller 10a and the backward roller 10b are disposed at positions facing each other with the guide plate 2 interposed therebetween is illustrated as an example. It only has to be provided. Further, three or more sets may be arranged in the circumferential direction of the protective tube 101.

Moreover, in the said embodiment, the structure which the rotating shaft 10c, 10d of the roller 10 engaged with the engaging protrusion 11b, 11c of the rotating plate 11 was shown as an example in the state which the hinge piece 9b was expand | deployed at about 180 degree | times. However, other development angles may be used. For example, if it is the structure which engages with the expansion | deployment angle | corner which becomes convex at the protection tube 101 side, since the roller 10a for advancing and the roller 10b for retraction can be spaced apart from the protection tube 101, it is the hinge axis | shaft by that much 9a is protective tube 10
It can arrange | position close to 1 side (guide plate 2 side). That is, it becomes possible to design compactly.

  In the above-described embodiment, the configuration in which the spring 9c is locked to the shaft ends of the rotary shafts 10c and 10d has been described as an example. However, a configuration in which the spring 9c is biased directly to the hinge piece 9b may be used.

  Further, the configuration in which the hinge shaft 9a is erected on the rotating plate 11 is shown as an example, but the rotating plate 11 may not be provided. For example, instead of the engaging projections 11b and 11c of the rotating plate 11, the hinged portion 9 with a spring may be configured to be restricted in rotation at a predetermined deployment angle.

  Moreover, in the said embodiment, the structure by which the hinge axis | shaft 9a stood in the substantially perpendicular direction was shown as an example. However, the present invention is not limited to this, and other directions may be used as long as they are arranged in a tangential direction of a circle centering on the axis of the protective tube 101.

  Further, in order to keep a predetermined distance between the base 17 and the movable member 18, a configuration in which a spring 24 is externally fitted to the outer periphery of the support post 23 is shown as an example. However, the present invention is not limited to this, and it may be disposed at a position away from the column 23, and a spring member other than the coil spring such as the spring 24 may be used.

  Moreover, in the said embodiment, the structure which fixes the forward roller 10a or the reverse roller 10b with the roller fixing | fixed part 13 was shown as an example. However, the structure which fixes the hinge piece 9b may be sufficient.

  Moreover, in the said embodiment, the structure which adjusts between the upper side grip part 15 and the lower side grip part 16a, 16b using the spiral staircase-shaped screw step part 22 was shown as an example. However, instead of the spiral portion 22, a linear staircase member may be used instead of a spiral shape. In this case, if it is slidably mounted in the linear direction, the step surface can be moved.

  Moreover, in the said embodiment, the rocking | fluctuating arm 21 provided as a raising / lowering part showed as an example the structure which raises / lowers along a circular arc track | orbit. However, it may be configured to move up and down vertically along a straight track.

  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 insertion machine or the like that inserts a protective tube covering the outer periphery of an electric wire installed on a power pole or the like into the electric wire.

DESCRIPTION OF SYMBOLS 1 Protective tube insertion machine 2 Guide plate 2a Upper end edge 2b Curved end edge 2c Long hole 3 Guide rod 4 Support frame 5 Drive part 6 Input part 7 Rail 8 Base part 9 Hinge part 9a with a hinge Hinge shaft 9b Hinge piece 9c Spring 10 Roller 10a Advance roller (first roller)
10b Reverse roller (second roller)
10c, 10d Rotating shaft 11 Rotating plate 11a Through hole 11b, 11c Engaging projection 12 Eye bolt 13 Roller fixing portion 13a, 13b Notch 14 Auxiliary oscillating portion 14a Oscillating piece 14b Oscillating support shaft 14c Coil spring 14d Roller (free rotation) roller)
14e Oscillating track 15 Upper gripping portions 16a, 16b Lower gripping portion 17 Base 18 Movable member 19 Stage 20 Lever 21 Oscillating arm (elevating part)
21a Bar-shaped member (elevating part)
22 Threaded portion 22a Step surface 23 Post 24 Spring (biasing member)
30, 31, 32, 33, 34, 35, 36, 37, 38 Arrow 100 Electric wire 101 Protective tube 101a Incision

Claims (6)

A base portion provided so as to be able to reciprocate in parallel with the front-rear direction in which the protective tube in which a slit-like incision portion extending in the longitudinal direction is formed;
A first roller that is unidirectionally rotatable and is rotatable in the case of relative movement backward on the abutting protection tube;
A second roller that is unidirectionally rotatable and is rotatable in the case of relative movement forward on the abutting protective tube;
The first roller is attached to the front side of two hinge pieces that are provided so as to be capable of moving integrally with the base portion and are connected by a hinge shaft that is arranged perpendicular to the front-rear direction, and the second roller is attached to the rear side. A spring-equipped hinge portion having a spring that urges the protective tube side to close;
A roller fixing portion that is provided on the base portion, is disposed at a rotational position where one of the first and second rollers can contact the protective tube, and can fix the other side against urging by the spring. When,
A protective pipe insertion machine characterized by comprising:   Two hinges that can be engaged with the respective shafts of the first and second rollers so that the hinge shaft is erected substantially vertically and the spring-loaded hinge part has a predetermined deployment angle against biasing. 2. The protective tube insertion machine according to claim 1, further comprising a rotating plate having an engaging projection formed at an end edge and rotatably attached to the base portion about the hinge shaft. In the vicinity of the crossing position of the electric wire and the protective tube, it is located on the opposite side of the electric wire with the protective tube in between, and the swing surface is parallel to the plane constituted by the protective tube and the electric wire. In addition, the swinging trajectory of the swinging end is arranged so as to partially overlap the passage region of the protective tube, and can be elastically swingable with a swinging position substantially perpendicular to the protective tube as a swinging center. Attached swing piece,
A free rotating roller having a rotation axis orthogonal to the rocking surface and attached to the rocking end so as to freely rotate;
The protective tube insertion machine according to claim 2, further comprising an auxiliary swinging portion made of   A guide formed by a plate-like body that is inserted into the incision portion and guides the protective tube, and is curved so that the width gradually increases from the receiving end of the protective tube toward the front side and is concave toward the front side. The protective pipe insertion machine according to claim 3, further comprising a plate.   The protective tube insertion machine according to claim 4, wherein a through hole is formed in the guide plate in a region where the inside of the incision portion of the protective tube is in sliding contact. An upper gripping part for holding the upper surface side of the electric wire;
A lower gripping portion which is provided at an upper end edge of the guide plate facing the upper gripping portion and holds the lower surface side of the electric wire;
A pedestal fixed to the side of the guide plate;
A movable member connected to the pedestal via an extendable support shaft, and fixed to the upper grip portion;
An urging member that is interposed between the pedestal and the movable member and urges the movable member upward so as to maintain a predetermined height with respect to the pedestal;
An elevating part that is provided integrally with the guide plate and is arranged so as to elevate in a direction substantially perpendicular to the direction in which the upper gripping part extends;
The movable member is formed in a staircase shape so that any one of the step surfaces is aligned with the lifting region of the lifting unit and is movable in a substantially vertical plane with respect to the lifting direction of the lifting unit. The attached staircase,
The protective tube insertion machine according to claim 4 or 5, characterized by comprising: