TW202032879A - Protective tube insertion tool - Google Patents

Abstract

Provided is a protective tube insertion tool with which slips due to raindrops, etc. do not easily occur even if a simple configuration is used. A protective tube insertion tool 1 is fixed to an overhead electric wire 100 by an electric wire gripping part 2 that grips from two directions. A substantially triangular interrupt plate 4 is formed integrally on one gripping piece 2b of a pair of gripping pieces 2a, 2b that constitute the electric wire gripping part 2. A guide rail 6 that guides a protective tube 101 is disposed along a lower edge 4a of the interrupt plate 4. A rubber roller 8, which conveys the protective tube 101 by a rotational force input from the outside via a connection part 12, has a hollow structure, and is in a largely deformed state due to being constantly pressed by the guide rail 6.

Description

Protective tube inserter

The present invention relates to a protective tube inserter, which is used for inserting or removing protective tubes covering overhead wires erected on electric poles or the like.

Protective tubes are used to protect overhead wires from damage caused by contact with trees, etc. In addition, when working near overhead power lines, the protective tube can also be used to prevent operators or work machines from contacting the power lines.

Fig. 10 is a perspective view of the connected protective tube 101.

The main body 102 of the protective tube 101 shown in FIG. 10, the female fitting portion 103 formed on one end of the main body 102, and the male fitting portion 104 formed on the other end are used with elastic And flexible insulating materials. As shown by the imaginary line, they have an inner diameter capable of accommodating the overhead wire 100 inside, and a slit-shaped opening 107 is linearly formed above the main body 102 in the longitudinal direction. With this material ˙ shape, the opening 107 is opened to store the overhead wire 100 inside, and is closed by the elastic restoring force of the protective tube 101, thereby covering the overhead wire 100. In addition, a pair of fin portions 109 extending in parallel to the diameter-expanding side of the cylinder are respectively formed from the opposite end edges where the opening portion 107 is formed.

In addition, 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 a female fitting portion 104 is formed at the other end that can be connected to other protective tubes 101 having the male fitting portion 104.配部103。 Fitting section 103. Linked protection The pipes 101 are each set to a predetermined length, and a plurality of pipes can be connected to the female and male fitting parts 103 and 104 to cover the long overhead wire 100.

The outer diameter of the male fitting portion 104 is greater than the outer diameter of the main body 102. In addition, the female fitting portion 103 is formed with a receiving portion 106 capable of receiving the male fitting portion 104 during fitting and capable of being coupled inside. Therefore, the receiving portion 106 of the female fitting portion 103 has a larger outer diameter than the male fitting portion 104.

Generally, when installing the above-mentioned protective tube 101 on the overhead wire 100, first insert the first protective tube 101 into the overhead wire 100, and then insert the front end of the second protective tube 101 into the overhead wire 100, and In the state of being inserted into the overhead wire 100, the two protective tubes 101 are connected by the female and male fitting parts 103 and 104 of each other. Then, by repeating the above-mentioned operations, a plurality of protective tubes 101 are inserted into the overhead power line 100.

Next, an apparatus for inserting the above-mentioned protective tube 101 into the overhead wire 100 will be described.

Figure 11 is a side view of the previous tube inserter 110. The tube inserter 110 is clamped to the overhead wire 100 by the wire holding gusset 111 at the upper end and the guide body 112. The protective tube 101 inserted along the guide rod 113 extending from the guide body 112 passes between the guide body 112 and the driving tire 116 into which compressed air is pressed. Then, the protective tube 101 that continues to be moved is guided toward the overhead wire 100 by expanding the opening 107 (refer to FIG. 10) by the tube expansion plate 115.

Among them, rollers 127 are provided on the side and lower end sides of the guiding body 112 to reduce friction with the protective tube 101. Therefore, the sliding resistance can be reduced, and the protective tube 101 can be smoothly inserted into the overhead wire 100 without losing the force applied by the self-driving tire 116. Patent Document 1 describes the tube inserter 110 as described above.

[Prior Technical Literature]

[Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 8-182135

However, the tube inserter 110 shown in FIG. 11 has a simple structure with only one driving tire 116, and compressed air is pressed into the driving tire 116, so the contact area with the protective tube 101 is small. Therefore, when raindrops or the like accumulate on the surface of the protective tube 101 in rainy weather, slippage is likely to occur.

In view of this, the object of the present invention is to provide a protective tube inserter, which, even with a simple structure, is unlikely to cause slippage caused by raindrops or the like.

In order to achieve the above-mentioned object, the protective tube inserter of the present invention is a protective tube formed with a slit, which widens a part of the slit and inserts it in an oblique direction with respect to the overhead wire. It is characterized in that it has: Electric wire gripping part, which grips the overhead electric wire by a pair of gripping pieces; an insert plate, which is formed integrally with the one gripping piece, and has the end edge squeezed into the slit; a guide rail, which is in the above-mentioned inserting plate The end edge side extends in an oblique direction with respect to the overhead wire to be grasped, and guides the inside of the protective tube; and a hollow rubber roller that deforms to include the region of the protective tube that is slidably connected to the guide rail The configuration is crimped.

In addition, the protective tube inserter of the present invention, in addition to the above configuration, is characterized in that the rubber roller is deformed so as to be in contact with the protective tube within a range of at least 70 degrees of center angle.

In addition, the protective tube inserter of the present invention, in addition to the above configuration, is characterized in that the internal pressure of the rubber roller is approximately atmospheric pressure in an undeformed state.

As mentioned above, according to the present invention, by deforming to include the area sliding with the guide rail, the hollow rubber roller is crimped and arranged on the protective tube, so that the outside can be contacted with the center of the contact area with relatively high pressure. side. That is, the contact area can be increased, and the pressure can be concentrated on the outside of the contact area. Thereby, raindrops and the like are easily dispersed, and raindrops can also be prevented from entering toward the center side of the contact area, so that excellent grip performance in rainy weather can be obtained.

In addition, according to the present invention, in addition to the above-mentioned effects, since the rubber roller can be deformed in contact with the protective tube within a range of at least a central angle of 80 degrees, the slack of the center side of the contact area due to deformation is more obvious. That is, the pressure can be concentrated more effectively to the outside of the contact area.

In addition, according to the present invention, in addition to the above-mentioned effects, the rubber roller is filled with gas at an internal pressure of approximately atmospheric pressure in an undeformed state. Therefore, it can be deformed to the extent that the center side of the contact area is recessed, and the internal pressure is deformed. Rise at the right time. In this way, by appropriately obtaining the internal pressure without hindering deformation, the vibration of the rubber roller can be suppressed, and a certain deformation state can be stably maintained.

1: Protective tube inserter

2: Wire holding part

2a, 2b: control piece

4: Embedded board

4a: End edge

6: Rail

8: Rubber roller

10, 12: connecting part

10a: Screw shaft

14, 16: Remote lever

18: Connecting components

20: Bevel gear

20a: Crown gear

20b: pinion

22: contact area

22a, 22b: high pressure area

51: Protective tube inserter

54: Embedded board

54a: End edge

54b: gap

56: Rail

58: Rubber roller

60: Crimp area (contact area)

60a, 60b: high pressure area

100: (overhead) wire

101: Protective tube

102: body part

103: Female fitting part

104: Male fitting part

106: Storage Department

107: Opening

109: Wing part

110: Tube Inserter

111: Wire retention angle brace

112: Guiding ontology

113: guide rod

115: plate for pipe expansion

116: drive tires

127: Roller

A, B, C, D, E: arrow

θ: central angle

Fig. 1 is an overall perspective view of the front side of the protective tube inserter of the first embodiment.

Fig. 2 is an overall perspective view of the back side of the protective tube inserter of the first embodiment.

Fig. 3 is an overall perspective view showing the use state of the protective tube inserter.

Figure 4 is a front view showing the use state of the protective tube inserter.

Fig. 5 is a schematic diagram showing the state of the rubber roller and the protective tube in a crimped state viewed from the bottom side.

Fig. 6 is a schematic diagram showing the effect of pressure in a longitudinal section.

Fig. 7 is an overall perspective view of the front side of the protective tube inserter of the second embodiment.

Fig. 8 is a front cross-sectional view showing the state of use of the protective tube inserter, (a) shows a state where the protective tube is not configured, and (b) shows a state where the protective tube is configured.

Fig. 9 is a schematic diagram showing the state of the rubber roller and the protective tube in the crimped state viewed from the bottom surface side.

Figure 10 is a diagram showing the previous protective tube.

Figure 11 is a diagram showing the previous tube inserter.

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

<First Embodiment>

FIG. 1 is an overall perspective view of the protective tube inserter 1 of the first embodiment of the present invention viewed from the rubber roller 8 side. In this specification, the side on which the rubber roller 8 is displayed is referred to as the front side. In addition, FIG. 2 is an overall perspective view of the protective tube inserter 1 of FIG. 1 viewed from the side of the gripping mechanism, that is, the wire gripping portion 2 on the back side. Hereinafter, the configuration will be described separately. Furthermore, the protective tube 101 of FIG. 10 is taken as an example to describe the protective tube.

字形之把持片2b，與大致三角形之板狀嵌入板4一體地構成。 The wire gripping portion 2 is constructed in such a manner that an overhead wire (hereinafter referred to as a wire) can be clamped by a pair of facing gripping pieces 2a, 2b. The wire gripping portion 2 is configured to be opened and closed by rotating and operating a screw shaft 10a from a distal position, and the screw shaft 10a is directly connected to a connecting portion 10 to which a distal operating rod 14 described later can be connected. Cross section of the supporting object on the lower side of the pair of gripping pieces 2a, 2b

The zigzag gripping piece 2b is formed integrally with the substantially triangular plate-shaped insertion plate 4.

The insert plate 4 is a structural member that determines the direction of the slit by squeezing the lower end 4a into the slit of the protective tube. The guide rail 6 is arranged on this edge 4a so as to extend in an oblique direction with respect to the electric wire to be grasped.

The guide rail 6 is made of resin material such as Teflon (registered trademark) and a metal material with a small friction coefficient. Below the guide rail 6, a hollow rubber roller 8 is arranged in a crimped state accompanied by deformation.

字形之把持片2b的背面側所延伸的連設構件18而與嵌入板4及導軌6一體地構成。旋轉力經由傘齒輪20傳遞至該橡膠輥8。 The rubber roller 8 is from the above section

The connecting member 18 extending from the back side of the gripping piece 2b in the shape of a font is formed integrally with the insertion plate 4 and the guide rail 6. The rotational force is transmitted to the rubber roller 8 via the bevel gear 20.

The crown gear 20a on the low rotation side of the bevel gear 20 is arranged on the rubber roller 8 side, and the pinion gear 20b on the high rotation side is connected with a connecting portion 12 to which the distal end operating lever 16 described later can be connected.

Since it is configured as described above, in the protective tube inserter 1 of the first embodiment of the present invention, the rubber roller 8 is always pressed against the guide roller and deformed. Next, the use state will be explained using FIG. 3.

FIG. 3 is an overall perspective view showing the use state of the protective tube inserter 1, and is a view viewed from the front side the same as FIG. 1. The electric wire 100 is grasped by the electric wire grasping part 2, a protective tube 101 (refer to FIG. 10) is arranged on the catheter 6, and the two connecting parts 10, 12 are connected with distal operating rods 14, 16. Since the wires 100, the protective tube 101, and the remote operating rods 14, 16 are all elongated objects, they are partially omitted and shown. In FIG. 3, the male fitting portion 104 of the protective tube 101 is shown in a state in which the rubber roller 8 and the guide rail 6 are clamped. When the protective tube 101 is inserted, the operator In this way, the protective tube 101 can be arranged to the position where the male fitting part 104 is clamped, and then the rubber roller 8 to which the rotational driving force is transmitted through the distal end operating lever 16 is fed toward the electric wire 100 side.

The power source used to generate the rotational driving force can be replaced by manual lever operations, hand drills and other driving devices. In addition, it may also be a configuration in which the power source is connected wirelessly or wiredly and operated from a remote location. In this case, if a foot switch or the like is used, interference with auxiliary operations of directly operating the protective tube 101 can be avoided, so safe and effective operations can be performed.

As mentioned above, the rubber roller 8 has been deformed since it was installed with the protective tube 101, but because it has a sealed hollow structure and is filled with gas at a low pressure, even if the side to be installed is the female fitting portion 103, it can be used It is more deformed and easily clamped. In the configuration of this embodiment, the pressure in the rubber roller 8 is set so as to be approximately atmospheric pressure in the undeformed state.

Although the state before the insertion of the electric wire 100 is shown, the same is true when the protective tube 101 is pulled out from the electric wire 100. As long as the rotation drive mechanism (not shown) is reversed, it can be used for insertion and removal. Any operation. Next, the state of use will be explained from another perspective.

FIG. 4 is a front view showing the use state of the protective tube inserter 1. From the front view, the degree of deformation of the rubber roller 8 can be easily understood. The range that can be contacted with the protective tube 101 due to deformation is indicated by the center angle θ of the rubber roller 8. In the configuration of this embodiment, the value of the central angle θ is set to approximately 80 degrees. However, in order to obtain the same effect, it is expected that the rubber roller 8 can be crimped and disposed so that the center angle θ is at least 70 degrees.

Here, the specific values are listed. Assume the target protective tube 101 The diameter is about 25 to 35mm. In contrast, the diameter of the rubber roller 8 side is 113mm, the width of the roller surface is 70mm, the rubber thickness is 10mm, the number of grooves is 36, the groove width is 4.4mm, the groove depth is 2.5mm, and the width of the convex portion is 5mm.

The pressure distribution in the pressure-bonded state of the protective tube 101 and the rubber roller 8 as described above will be described using FIGS. 5 and 6.

FIG. 5 is a schematic diagram showing the state of the rubber roller 8 and the protective tube 101 in a crimped state viewed from the bottom surface side. The guide rail 6 in the protective tube 101 is shown in dashed lines. For convenience of description, the illustration of other configurations is omitted.

The contact area 22 of the rubber roller 8 with respect to the protective tube 101 is shown surrounded by a little chain line. The areas shown by oblique lines in the substantially elliptical contact area 22 become high pressure areas 22a and 22b of relatively high pressure. As shown in FIG. 5, an arc-shaped high-voltage region 22a is formed on the edge side of the contact region 22 in the longitudinal direction. In addition, a high-pressure region 22b along the length direction is formed in the width direction. Among them, in the high pressure region 22a on the longitudinal direction side, the rubber roller 8 has the largest curvature and is in a state where the pressure is most likely to be concentrated.

Furthermore, the high-pressure regions 22a, 22b schematically show a pressure distribution of higher pressure above a certain value. Therefore, due to the combination of the relative size of the rubber roller 8 with respect to the protective tube 101 and the rubber thickness, the shapes of these areas may be different, and there may be cases where the high-pressure areas 22a and 22b are continuously displayed. Regardless of the combination, when the hollow rubber roller 8 is filled with gas at a low pressure (about atmospheric pressure) as in the configuration of the present embodiment, there is a common pressure that is concentrated in the outer area relative to the central area. feature.

This is because the rubber roller 8 can be greatly deformed, and the contact area is recessed so as to be folded toward the inside. As mentioned above, because the outer circumference of the contact area is relatively high Therefore, even if raindrops adhere to the protective tube 101 in rainy weather, the raindrops cannot easily enter the contact area. Therefore, skidding caused by raindrops can be prevented, and stable operation can be performed regardless of the weather.

Fig. 6 is a schematic diagram showing the effect of pressure in a longitudinal section. As shown in this way, since the rubber roller 8 is pressed in at the center side (in the direction of arrow A) in the width direction, the outer area is deformed so as to be drawn closer to the center side (in the direction of arrows B and C). Therefore, it deforms while generating a force as if covering the protective tube 101 in the width direction. The protective tube 101 is stabilized in the width direction by the force acting like the covering, and the clamping force is increased. In addition, as described above, it also has the effect of preventing raindrops from entering.

As described above, the protective tube inserter 1 of this embodiment does not require a mechanism for changing the distance between the guide rail 6 and the rubber roller 8 in order to insert the protective tube 101 therebetween. Thereby, the weight can be reduced, the operation becomes easy, and the manufacturing cost can also be suppressed. In addition, it not only has a simple structure like the above-mentioned roller, but also can effectively transmit force to the protective tube.

<Second Embodiment>

Fig. 7 is an overall perspective view showing the protective tube inserter 51 according to the second embodiment of the present invention. As with FIG. 1 of the first embodiment, this drawing is viewed from the front side where the rubber roller 58 is arranged. Among them, the same structure as the protective tube inserter 1 of FIG. 1 will be described with the same component numbers attached.

In the protective tube inserter 1 of FIG. 1, the guide rail 6 is formed as a linear member. The difference is that the insertion plate 54 of the protective tube inserter 51 of FIG. 7 is formed with a notch 54b and passes through The notch 54b partially divides the guide rail 56.

The notch 54b is formed to be slightly larger than the outer shape of the rubber roller 58. therefore, In the configuration of this embodiment, the rubber roller 58 does not deform when the protective tube 101 is not inserted. Next, the difference caused by the presence or absence of the protective tube 101 will be described using FIG. 8.

FIG. 8 is a cross-sectional view showing the use state of the protective tube inserter 51 of FIG. 7 in a front view. Here, for the convenience of description, the figures are only shown schematically with the minimum configuration required. Fig. 8(a) shows a state where no protective tube is provided, and Fig. 8(b) shows a state where a protective tube is installed. The triangular member is embedded in the plate 54. A gripping piece 2a is arranged along the upper side of the insert plate 54, and the gripping piece 2a supports the electric wire on the upper side of the electric wire gripping portion 2 (see FIG. 1). The rail 56 is closely attached to the lower edge of the embedded plate 54. In addition, in FIG. 8( b ), the member extending along the guide rail 56 at the lower end of the insert plate 54 shows a part of the tube wall of the protective tube 101.

First, referring to FIG. 8(a), in the state where the protective tube 101 is not installed, as described above, the rubber roller 58 is not deformed. Therefore, even in the case where the protective tube 101 is detached and idling, the rubber roller 58 does not slide in contact with the guide rail 56, so that abrasion can be suppressed.

On the other hand, FIG. 8(b) shows a state where the protective tube 101 is installed and the rubber roller 58 is deformed. If only paying attention to the relationship between the protective tube 101 and the rubber roller 58, it is the same as the protective tube inserter 1 of the first embodiment.

Next, as in the case of the first embodiment, the pressure distribution will be described.

9 is a schematic view of the rubber roller 58 and the protective tube 101 in a crimped state viewed from the bottom surface side. As in FIG. 5, the guide rail 56 in the protective tube 101 is shown in dashed lines. For the convenience of description, it is the same as in FIG. 5 in that illustration of other configurations is omitted. Observing FIG. 9, it is not related to the presence or absence of the notch 54b of the embedded plate 54 (see FIG. 8). The contact area 60 of the rubber roller 58 with the protective tube 101 and the contact area 60 in the contact area 60 The patterns of the high-pressure regions 60a and 60b above a certain level are substantially the same.

Therefore, in the protective tube inserter 51 of this embodiment, the pressure is most likely to be concentrated in the high-pressure region 60a formed in the longitudinal direction. What is worth noting here is the position of the guide rail 56. As shown in FIG. 7, in the state where the protective tube 101 is not installed, the rubber roller 58 is stored inside the notch 54b. However, as shown in FIG. 8, it can be seen that by being crimped to the protective tube 101, the The upper part is slightly expanded by pressing, and a crimping area 60 is formed up to the area where the guide rail 56 is formed (positions indicated by arrows D and E in FIG. 8 ). And, as described above, it becomes a state where pressure is most easily applied to the position of the guide rail 56. That is, the area where the notch 54b is formed is located on the central side where the pressure is low. Therefore, in the sending operation of the protective tube 101, the influence of the notch 54b hardly occurs.

Here, regarding the function of the high-voltage region 60b formed in the width direction, the description using FIG. 6 can be directly used.

As described above, according to the structure of this embodiment, even if the auxiliary rollers such as rollers are not provided on the guide rail 56 side, the abrasion of the rubber roller 58 during idling can be reduced, and the replacement is easy. In addition, in the insertion operation of the protective tube 101, the same effect as the first embodiment can be obtained.

In addition, the configuration described so far is a part of the embodiment of the present invention, and the following modifications are also included in the present invention.

In the above embodiment, the rubber rollers 8 and 58 have grooves extending in the width direction, but the grooves are not essential.

In addition, in the above-mentioned embodiment, as the gripping mechanism of the wire gripping portion 2, the configuration in which the distal end operating lever 14 is rotated about the axis and one of the gripping pieces 2a, 2b is lifted and lowered by the lead screw mechanism is exemplified. However, it can also be replaced by other controlling institutions. For example, it can be replaced by a combination of rack and pinion. In this case, If the shaft of the pinion gear is arranged in the horizontal direction, the lifting operation can be carried out at the position separated from the wire and protective tube inserters 1, 51 in the horizontal direction, so the operation with the rotation drive side of the rubber rollers 8, 58 can be avoided Interference. In addition, in the above-mentioned embodiment, regarding the wire gripping portion 2, a lifting portion using a lead screw mechanism and a portion directly in contact with the wire are integrally formed with different members as a pair of gripping pieces 2a, 2b. . However, a configuration in which a portion directly contacting the electric wire and a clamping mechanism portion are continuously formed with the same member can also be used as a pair of gripping pieces 2a and 2b to make the electric wire gripping portion 2 more widely grasped.

In addition, in the above embodiment, the rubber rollers 8, 58 are arranged near the center of the guide rails 6, 56 as an example. However, as long as the rubber rollers 8 and 58 are arranged opposite to the guide rails 6 and 56, the rubber rollers 8 and 58 can be arranged at any position. Therefore, it can also be arranged near the front end of the guide rails 6, 56 in accordance with the shape and diameter of the fitting portion of the protective tube 101 to be the object.

In addition, in the above-mentioned embodiment, the structure in which the guide rails 6 and 56 are formed by one continuous member is shown as an example. However, it may be a structure including a part (overlapping) in the crimping area of the guide roller, and it may be divided into sections as long as the structure extends along a virtual guide wire inclined with respect to the electric wire to be held. The composition of plural articles. Similarly, in the second embodiment, even if it is a configuration in which the guide rails 6 and 56 are divided in the area other than the notch 54b, the same effect can be obtained as long as a virtual guide wire is formed as a whole.

In addition, in the above-mentioned embodiment, the structure in which the width of the roller surface of the rubber rollers 8, 58 is wider than the protective tube is shown as an example. However, as long as the width of the roller surface is set to be wider than the width of the guide rails 6, 56, the force of covering from the width direction during deformation can be obtained.

In addition, in the above-mentioned second embodiment, it is shown as an example that the guide rail 56 is divided at the cross-sectional position shown in FIG. 8 at the position where the notch 54b of the insert plate 54 is formed, and is shown in the perspective view shown in FIG. 7 Part of the continuous composition. However, the guide rail 56 can be completely divided not only at the cross-sectional position but also at the side.

In addition, in the above-mentioned embodiment, the rubber roller 8, 58 is shown as an example, and the configuration in which gas is filled in the sealed space at substantially atmospheric pressure is shown. However, as long as it is a rubber thickness that can deform to the same degree and generate appropriate pressure, it may not be sealed.

(Industrial availability)

The protective tube inserter of the present invention can reliably clamp the protective tube in a wide contact area, so it is particularly advantageous for operations in rainy weather.

1: Protective tube inserter

2: Wire holding part

2a, 2b: control piece

4: Embedded board

4a: End edge

6: Rail

8: Rubber roller

10, 12: connecting part

10a: Screw shaft

18: Connecting components

20: Bevel gear

20a: Crown gear

20b: pinion

Claims (3)

A protective tube inserter is a protective tube formed with a slit, which widens a part of the slit and inserts it in an oblique direction relative to an overhead wire, and is characterized in that it has: A wire holding part, which holds the overhead wire by a pair of holding pieces; An insert plate, which is integrally formed with the above-mentioned one holding piece, and has the end edge squeezed into the above-mentioned slit; A guide rail, which extends in an oblique direction with respect to the overhead wire to be held on the edge side of the insert plate, and guides the inside of the protective tube; and The hollow rubber roller is deformed so as to include the area of the protective tube that is slidably connected to the guide rail and is arranged to be crimped. The protective tube inserter of claim 1, wherein the rubber roller is deformed so as to contact the protective tube within a range of at least a center angle of 70 degrees. The protective tube inserter of claim 1 or 2, wherein, in an undeformed state, the internal pressure of the rubber roller is approximately atmospheric pressure.

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