Installation aid tool for bellows tube

Abstract

Provided is an installation aid tool for a bellows tube that can be fixed to an electric wire by remote operation and hardly transmits a load, which is associated with insertion of the bellows tube, to the electric wire. A main body 2 of a bellows tube installation aid tool 1 is provided with a rod-shaped grip part 2a. An operation lever 10 is rotatably supported by a shaft above the main body 2, and a sliding contact part 6 is provided below the main body 2 via a connection part 4. The sliding contact part 6 is formed in a size that allows the sliding contact part 6 to slide inside a bellows tube. A slide rod 8 slidable in a direction parallel to the connection part 4 is inserted into the sliding contact part 6. A tip of the slide rod 8 is linked with the operation lever 10, and moves forward and backward in the sliding contact part 6 by the rotating operation of the operation lever 10. An electric wire housed from a housing port 6a of the sliding contact part 6 is crimped and fixed at the tip of the slide rod 8 by rotating the operation lever 10.

Description

Corrugated pipe installation aid

[0001] The present invention relates to an auxiliary tool for attaching a protective pipe to an electric wire, and more particularly to an auxiliary tool for attaching a corrugated pipe, which is a corrugated-shaped poly pipe, to a high-voltage downline.

[0002] Unlike other high-voltage and low-voltage lines, which are laid in a roughly straight line, the high-voltage drop lines connecting the high-voltage lines and the pole-mounted transformers are not routed in a uniform pattern. For this reason, relatively flexible corrugated poly pipes (corrugated pipes) are used to insulate and protect the high-voltage drop lines.

[0003] Figure 8 shows a conventional corrugated tube installation tool. This corrugated tube installation tool has a structure that clamps the electric wire with a knob. A pointed, cylindrical corrugated tube inserter is used as a guide to guide the corrugated tube toward the clamped electric wire. This type of corrugated tube installation tool has a compact structure for clamping the electric wire, so it can be installed even in curved areas.

[0004] JP 2011-182531 A

[0005] As described above, the corrugated tube attachment tool 101 in Figure 8 can feed the corrugated tube 100 toward the electric wire W along the corrugated tube inserter 102, which serves as a guide. However, the high-voltage downline to be attached is unstable because it is not tensioned, and the corrugated tube 100 is also made of a flexible material, making it difficult to perform the work in a stable manner using an indirect live-line tool. Specifically, the operation involves holding the electric wire W side with insulated pliers or the like, which are indirect live-line tools, on one hand, while pulling the corrugated tube 100 toward the electric wire W side with another insulated pliers or the like, on the other hand.

[0006] In this case, excluding the area of ​​the corrugated tube 100 passing along the corrugated tube inserter 102, only a portion of the corrugated tube attachment tool 101 where the knob 103 and slit 104 are formed is exposed, and almost no portion can be stably gripped with insulated pliers or the like. Therefore, after the tip of the corrugated tube 100 is transferred to the corrugated tube inserter 102, the insulated pliers or the like that were holding the corrugated tube attachment tool 101 must be transferred to the electric wire W side. In this case, force due to the weight or the like applied from the sliding corrugated tube 100 to the corrugated tube attachment tool 101 is concentrated in the area of ​​the electric wire W that is clamped by the knob 103. Furthermore, if a load is directly applied to the high-voltage drop line, concentration of the load at the connection point between the high-voltage drop line and the high-voltage line or the pole transformer to which the high-voltage drop line is connected also becomes a problem.

[0007] Therefore, an object of the present invention is to provide an attachment aid for a corrugated tube that can be fixed to an electric wire by remote control and that does not easily transmit the load associated with inserting the corrugated tube to the electric wire.

[0008] In order to achieve the above object, the corrugated pipe installation aid of the present invention is an installation aid for a corrugated pipe for insulation protection that accommodates an electric wire by inserting it through a slit formed in the longitudinal direction, and is characterized by comprising: a main body having a gripping portion; a sliding contact portion that accommodates a longitudinal portion of the electric wire and is slidable within the corrugated pipe; a connecting portion that connects the sliding contact portion to the main body; an operating lever that is rotatably supported on an axis relative to the main body; and a slide rod that is slidable along the connecting direction of the connecting portion and is connected to the operating lever so that the tip is crimped to the electric wire that is accommodated in the sliding contact portion by a rotating operation.

[0009] Furthermore, in addition to the above configuration, the attachment aid for a bellows tube of the present invention is characterized in that the slide rod is crimped onto the electric wire when the operating lever is positioned within a rotation range on the opposite side of the gripping portion via the rotation center.

[0010] Furthermore, in addition to the above configuration, the attachment aid for a bellows tube of the present invention is characterized in that it comprises a claw portion provided on the operating lever and biased toward the rotation center, and a groove portion formed on the main body facing the rotation area on the opposite side of the grip portion via the rotation center, the groove portion engaging with the claw portion at a rotation position where the electric wire is crimped to the slide rod within the sliding contact portion.

[0011] In addition to the above configuration, the attachment aid for a bellows pipe of the present invention is characterized in that the sliding contact portion has an accommodation opening for accommodating the electric wire, the accommodation opening facing the opposite side to the gripping portion.

[0012] In addition to the above configuration, the attachment aid for a bellows pipe of the present invention is characterized in that the gripping portion has a rod-shaped portion extending in a direction perpendicular to the connecting direction of the connecting portion.

[0013] As described above, according to the present invention, the sliding contact portion that guides the corrugated tube by sliding relative to the inside is disposed apart from the main body via the connecting portion. Therefore, even if the sliding contact portion that houses the electric wire is designed compactly, it can be supported by the gripping portion on the main body that is separated via the connecting portion, so that the load associated with attaching the corrugated tube is not directly transmitted to the electric wire, thereby making it possible to stabilize the pipe.

[0014] In addition to the above-mentioned effects, the present invention allows the operation of the operating lever, which requires a relatively large force to crimp and fix the electric wire, to be performed in a rotation range away from the grip, preventing interference with the tool holding the grip, thereby improving the degree of freedom in work style.

[0015] In addition to the above-mentioned effects, the present invention also provides the advantage that the direction of the force that rotates the operating lever toward the groove and the direction that releases the claw that is engaged with the groove are both directions that move away from the grip. This means that the way of applying force to lock and release the electric wire can be performed with almost the same action, so there is no need to change the working posture significantly, and it is possible to operate with a common tool.

[0016] In addition to the above effects, the present invention is configured so that the electric wire is accommodated from the side opposite to the gripping portion, thereby preventing interference between the electric wire and the gripping tool. Furthermore, when the operating lever is rotated to crimp and fix the electric wire accommodated in the sliding contact portion with the slide rod, if the operation lever is rotated using the sliding contact portion as a foothold (fulcrum), a force is applied in the direction of pushing the electric wire into the sliding contact portion, thereby preventing an operational error such as accidentally dropping the electric wire out of the accommodation opening.

[0017] In addition to the above-mentioned effects, the present invention also provides an improved gripping mechanism in which the extending direction of the rod-shaped portion of the gripping portion and the sliding direction of the slide rod are perpendicular to each other, so that the plane of gripping motion of the tool gripping the gripping portion is parallel to the sliding direction. This prevents interference between the gripping tool and the sliding portion during gripping operation, and after gripping, the connecting portion, the sliding portion, or the electric wire can be kept in a stable state by abutting against the side of the gripping tool (a plane parallel to the gripping motion plane).

[0018] Fig. 3 is an overall perspective view of a corrugated pipe installation aid in an arrangement for releasing an electric wire. Fig. 4 is an overall perspective view of a corrugated pipe installation aid in an arrangement for locking an electric wire. Fig. 5 is a schematic side view of the corrugated pipe installation aid of Fig. 1. Fig. 6 is a schematic side view of the corrugated pipe installation aid of Fig. 2. Fig. 7 is a view showing a state in which the corrugated pipe installation aid is in use. Fig. 8 is a view showing a first modified example of the claw portions and groove portions. Fig. 9 is a view showing a second modified example of the claw portions and groove portions. Fig. 10 is a view showing a conventional corrugated pipe installation tool.

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0020] FIG. 1 is an overall perspective view of a bellows pipe installation aid 1 according to the present invention.

[0021] A main body 2 is provided at approximately the center of the bellows pipe installation aid 1 in the vertical direction. The main body 2 has a cylindrical grip portion 2a. An operating lever 10 is provided above the main body 2. The operating lever 10 is rotatable relative to the main body 2. A dashed-dotted line L1 drawn to pass through the main body 2 indicates the position of the rotation center of the operating lever 10. The upper end of the operating lever 10 is formed into a T-shape by a handle 10b provided to extend parallel to the dashed-dotted line L1. The operating lever 10 is rotatable in the direction of the arrow.

[0022] A sliding contact portion 6 is provided below the main body 2 via a connecting portion 4. The sliding contact portion 6 has an ellipsoidal shape. The sliding contact portion 6 has an accommodation opening 6a formed on the opposite side of the rotation center (the position of the dotted line L1) from the gripping portion 2a, which accommodates a portion of the electric wire in the longitudinal direction. The connecting portion 4 connecting the sliding contact portion 6 to the main body 2 is composed of two pillars. A slide bar 8 is provided between these two connecting portions 4 and parallel to the connecting portions 4. The slide bar 8 is slidable along the connecting direction of the connecting portions 4. The slide bar 8 slides by rotating the operating lever 10. When the slide bar 8 is pulled down by operating the operating lever 10 with the electric wire accommodated in the sliding contact portion 6, the tip of the slide bar 8 is crimped to the electric wire. This allows the electric wire to be crimped and fixed in the sliding contact portion 6.

[0023] 1 shows the wire release state where the wire is not crimped and fixed. The internal mechanism will be explained later using a schematic diagram.

[0024] A claw 10a is provided on the lower side of the operating lever 10. This claw 10a is formed integrally with a handle 10b. The claw 10a and the handle 10b are biased toward the rotation center of the operating lever 10, and when no external force is applied, the claw 10a is pressed against the edge of the main body 2. A groove 2b is formed on the edge of the main body 2 on the opposite side of the rotation center from the grip 2a. The claw 10a, which rotates as the operating lever 10 rotates, can engage with this groove 2b. The relationship between the claw 10a and the groove 2b will be explained later.

[0025] FIG. 2 is an overall perspective view of the bellows pipe installation aid 1, showing the arrangement for locking the electric wire.

[0026] The figure shows a state in which the operating lever 10 has been rotated to a position that is approximately aligned with the direction in which the cylindrical portion of the grip 2a extends. It can be seen that the claw 10a, which is formed integrally with the handle 10b of the operating lever 10, is engaged with the groove 2b formed in the main body 2. With the claw 10a engaged with the groove 2b in this manner, the operating lever 10 cannot be rotated simply by gripping the handle 10b and applying force in the rotation direction.

[0027] As described above, when the operating lever 10 is rotated to a position substantially parallel to the grip portion 2a, the slide rod 8 linked to the operating lever 10 is pushed down toward the sliding contact portion 6. Although the electric wire is not depicted in Fig. 2, when the electric wire is housed, the tip of the slide rod 8 is in a state of being crimped and fixed to the side of the electric wire. In the configuration according to this embodiment, the state in which the electric wire is crimped and fixed can be locked by the engagement of the claw portion 10a and the groove portion 2b.

[0028] FIG. 3 is a schematic side view of the bellows pipe attachment aid 1 of FIG.

[0029] The bellows pipe attachment aid 1 in Figure 3 is a schematic representation of the mechanism connecting the slide rod 8 and the operating lever 10, and other components are omitted so that their positional relationships can be understood. Here, the position of the electric wire W is indicated by the cross section with diagonal lines.

[0030] In the configuration according to this embodiment, a toggle link mechanism is employed to generate a crimping force on the electric wire W by the slide rod 8 based on the rotational force of the operating lever 10. The slide rod 8 is connected to a link portion 10c formed as part of the operating lever 10 by a link pin 12a. The link portion 10c is also connected to the main body via a link 14. The link portion 10c and the link 14 are connected by a link pin 12b, and the link 14 and the main body 2 are connected by a link pin 12c.

[0031] In this way, in the state in which the electric wire W is released, the link mechanism formed by the link portion 10c, the link 14, and the slide rod 8 is arranged to form a triangle. When the operating lever 10 is rotated from this released state to the lock side indicated by the arrow in the figure, the link 14 rotates around the link pin 12c relative to the main body 2, and the slide rod 8 is pushed down by the link portion 10c.

[0032] When performing such work, it is necessary to apply force to separate the handle 10b of the operating lever 10 from the gripping part 2a while supporting the gripping part 2a of the main body 2 with a gripping tool such as pliers. In the case of remote operation, the operation of separating the handle 10b from the gripping part 2a involves an arc motion centered around the operator, which pulls the tools attached to the ends of the operating rods apart, making it very difficult to apply force.

[0033] However, in the configuration of this embodiment, the sliding contact portion 6 is provided at a position separated from the main body 2 by the connecting portion 4 (see Figure 1) that extends perpendicular to the gripping portion 2a, so this sliding contact portion 6 can be used as a foothold.

[0034] 3, a part on the sliding contact portion 6 is selected as the fulcrum P1, and while the tool that rotates the operating lever 10 is stabilized, it is possible to perform a lever operation with the handle 10b as the point of application P2. In this way, by utilizing the remote operation, the distance between the point of force at the operator's hand (not shown) and the fulcrum P1 can be made large, so that the operating lever 10 can be pulled away from the grip portion 2a with little force, and the grip portion 2a can also be stably supported.

[0035] In the configuration according to this embodiment, a magnet 16 is provided inside the main body 2 to stabilize the operating lever 10 in the released state. In the released state, the operating lever 10 is attracted to the magnet 16, and is configured to prevent inadvertent sliding of the slide rod 8. While this configuration improves safety, simply moving the operating lever 10 away from the grip portion 2a during remote control is not easy. In addition, because the operating lever 10 is attracted and fixed to the main body 2 by the magnet 16, the initial operation of moving the operating lever 10 away from the magnet 16 requires a very large input from the remote control source.

[0036] However, as described above, by utilizing the sliding contact portion 6 disposed away from the main body 2, the operating lever 10 can be operated with leverage, allowing the operator to perform work in a stable manner.

[0037] Furthermore, since the storage opening 6a for the electric wire W is formed on the opposite side of the gripping portion 2a in the sliding contact portion 6, even if the tool operating the operating lever 10 slides on the sliding contact portion 6 and comes off toward the gripping portion 2a, interfering with the electric wire W, a force acts in the direction of pushing the electric wire W into the sliding contact portion 6, thereby preventing the electric wire W from falling out of the sliding contact portion 6.

[0038] FIG. 4 is a schematic side view of the bellows pipe attachment aid 1 of FIG.

[0039] 3, the mechanism connecting the slide rod 8 and the operating lever 10 is shown in a schematic manner, and other components are omitted so that the positional relationships can be understood. The position of the electric wire W is indicated by a cross section with oblique lines.

[0040] As can be seen in Figure 4, the corrugated pipe attachment aid 1 can crimp and fix the electric wire W at the tip of the slide rod 8 by rotating the operating lever 10 so as to move it away from the gripping portion 2a. In Figure 4, the rotation range of the operating lever 10 that can crimp and fix the electric wire W in this way is shown by the boundary represented by the two-dot chain line L2 and the diagonal lines.

[0041] The toggle link mechanism described with reference to Fig. 3 is in a stable state with the three link pins 12a, 12b, and 12c aligned in a straight line on the slide rod 8. Also, the claw 10a of the operating lever 10 described with reference to Fig. 1 is engaged with the groove 2b of the main body 2. The toggle link mechanism provides a certain degree of stability in the crimped and fixed state of the electric wire W, but the provision of a locking mechanism consisting of the claw 10a and the groove 2b further stabilizes the crimped and fixed state of the electric wire W.

[0042] The handle 10b, which is integrally formed with the claw 10a, is biased toward the center of rotation, so to release the lock, it is necessary to apply force to the claw 10a or the handle 10b from the center of rotation toward the diameter-enlarging side against the bias. The direction of the force for unlocking is a direction away from the grip 2a, which is the same direction as the direction for rotating the operating lever 10 toward the lock side as shown in Figure 3. Therefore, as in the case of Figure 3, by selecting a fulcrum P1 on the sliding contact portion 6, it is easy to use the lever action to pull the handle 10b away from the grip 2a and release the claw 10a from the groove 2b.

[0043] In the configuration of this embodiment, the direction of rotation of the operating lever 10 for crimping and fixing the electric wire W and the direction of applying force to release the engagement of the claw portion 10a are set to be approximately the same, so the worker does not need to change his / her posture significantly.

[0044] Furthermore, in both the rotation operation of the operating lever 10 in FIG. 3 and the release operation of the claw portion 10a in FIG. 4, the same mechanical action can be utilized in which a lever force is applied to the handle 10b, which serves as the fulcrum P1 and the action point P2, with the sliding contact portion 6 as the fulcrum. Therefore, there is an advantage that there is a high possibility that the remotely operated tool used can be shared.

[0045] FIG. 5 is a perspective view showing the bellows pipe attachment aid 1 in use.

[0046] A longitudinal portion of the electric wire W received through the receiving opening 6a is fixed to the sliding contact portion 6. Then, the corrugated tube 100 is fed toward the sliding contact portion 6 to which the electric wire W is fixed, from a direction oblique to the electric wire W. In such an operation, the sliding contact portion 6 needs to be stably held relative to the corrugated tube 100.

[0047] In the bellows pipe installation aid 1, the cylindrical portion of the gripping portion 2a of the main body 2 extends in a direction perpendicular to the extending direction of the connecting portion 4. Therefore, when a tool gripping the gripping portion 2a performs an opening and closing movement, the plane of movement is parallel to the extending direction of the connecting portion 4, so that the sliding contact portion 6 can be prevented from interfering with the gripping tool.

[0048] Furthermore, after gripping the gripping portion 2a, the gripping tool is positioned along the connecting portion 4, so if the gripping tool is positioned close enough to contact the sliding contact portion 6, the bellows pipe attachment aid 1 can be supported at multiple points on the gripping tool when attaching the bellows pipe 100. This not only prevents the bellows pipe 100 from losing its posture significantly, but also makes it possible to temporarily fix the bellows pipe 100 by sandwiching it between the sliding contact portion 6 and the gripping tool while it is being attached.

[0049] Modifications of the bellows pipe attachment aid 1 shown in Figs. 1 to 5 will be described below.

[0050] <Modification 1> FIG. 6 is a partial enlarged view showing the claw portion 10d and the groove portion 2c of a first modification.

[0051] Unlike the claw 10a shown in Fig. 4, the surface on the wire-releasing side is inclined and is formed so that it becomes thicker toward the tip. Accordingly, the groove 2c is formed so that it is wider toward the back side than toward the opening side. The configuration other than the claw 10d and groove 2c is the same as the configuration in Figs. 1 to 5.

[0052] In Figure 6, the direction of the biasing force acting on the claw 10d and handle 10b (see Figure 4) of the operating lever 10 is indicated by a dashed line. Therefore, the claw 10d and handle 10b are configured to be slidable along this dashed line. As can be seen in Figure 6, the surface of the claw 10d on the wire-releasing side is inclined with respect to the sliding direction of the claw 10d and handle 10b, so the resistance when removing the claw 10d from the groove 2c is greater than in the configuration of Figure 4.

[0053] As described above, compared to the configuration of Figure 4, the configuration of variant example 1 of Figure 6 is more effective in preventing the claw portion 10d from accidentally coming off the groove portion 2c, making it difficult to release the claw portion 10d from the groove portion 2c against the biasing force acting toward the center of rotation.

[0054] However, in the first modification, the inclined surface of the inclined structure (in-groove resistance structure) formed between the claw 10d and the groove 2c is formed on the side farther from the sliding contact portion 6 (see FIG. 4). Therefore, as shown in FIG. 4, when a fulcrum P1 is selected on the sliding contact portion 6 and a force is applied to move the handle 10b in an arc, the force acts between the claw 10d and the groove 2c in a direction along the inclined surface, thereby reducing the resistance to separation.

[0055] In this way, in the configuration of variant example 1, resistance increases when the claw portion 10d is inadvertently released, and resistance decreases when the claw portion 10d is intentionally released, making it possible to improve safety without reducing work efficiency.

[0056] <Modification 2> FIG. 7 is a partial enlarged view showing the claw portion 10e and the groove portion 2d of a second modification.

[0057] Unlike the claw 10a shown in Fig. 4, the claw 10e of Modification 2 has a step on the wire-releasing side, and is formed so that it is thicker at the tip. Accordingly, the groove 2d is formed so that it is wider at the back side than at the opening side, so that the tip side of the claw 10e, which has become thicker due to the step, can engage. The configuration other than the claw 10e and the groove 2d is the same as the configuration in Figs. 1 to 5.

[0058] Here, as in the case of FIG. 6, the direction of the biasing force acting on the claw portion 10e and the handle 10b (see FIG. 4) is indicated by a dashed line.

[0059] Because of this configuration, the claw 10e cannot be easily removed from the groove 2d simply by applying a force in a direction that resists the bias. In order to remove the claw 10e from the groove 2d, it is necessary to simultaneously apply a force in both the direction opposite to the wire release side and in the direction that resists the bias.

[0060] In this modified example 2, too, a step structure (in-groove resistance structure) that generates resistance to the removal of the claw portion 10e from the groove portion 2d is formed on the side farther from the sliding contact portion 6 (see FIG. 4). Therefore, as in the case of modified example 1 described in FIG. 6, when a force is applied to the handle 10b so as to cause an arc motion with the sliding contact portion 6 as the fulcrum, a force can be applied that pulls the claw portion 10e toward the sliding contact portion 6 and removes it from the groove portion 2d. As a result, in the configuration of modified example 2, it is possible to obtain the effect of increasing resistance to inadvertent removal of the claw portion 10e and reducing resistance when the claw portion 10e is removed intentionally.

[0061] The configuration of the above embodiment is an example of the present invention, and further includes the following modifications.

[0062] (1) In the above embodiment, an example has been shown in which the electric wire is released when the operating lever 10 is disposed approximately parallel to the connecting portion 4, and the electric wire is crimped and fixed when the operating lever 10 is disposed approximately parallel to the gripping portion 2a. However, as long as the sliding portion 6 and the gripping portion 2a are disposed along the plane of rotation of the operating lever 10, the angle of the operating lever 10 for releasing and crimping the electric wire W is not limited to a position parallel to the connecting portion 4 and the gripping portion 2a. A similar effect can be obtained as long as the electric wire can be crimped and fixed at least within the range indicated by the two-dot chain line L2 and the diagonal line in Fig. 4.

[0063] (2) In the above embodiment, the configuration of the bellows tube attachment auxiliary tool 1 is shown as an example, which includes a locking structure consisting of the claws 10a and the grooves 2b. However, as long as the operating lever 10 can stably hold the crimped and fixed position of the electric wire relative to the slide bar 8 by means of a toggle link mechanism, the configuration may not include a locking structure consisting of the claws 10a and the grooves 2b. Conversely, if the operating lever 10 includes a locking structure consisting of the claws 10a and the grooves 2b, the operating lever 10 that slides the slide bar 8 may be connected by a link mechanism other than a toggle link mechanism.

[0064] (3) In the above embodiment, the connecting portion 4 is formed by two columnar members as an example. However, two columns are not required as long as the connecting portion 4 is formed by two columns and does not interfere with the sliding movement of the slide bar 8. For example, the connecting portion 4 may be formed by a single columnar member having an elliptical cross section perpendicular to the direction of extension of the slide bar, and the slide bar may be slidably disposed inside the columnar member. In this case, if the connecting portion is disposed so that its major axis coincides with the longitudinal direction of the electric wire W, friction with the slit of the slide bar 8 can be kept small.

[0065] (4) In the above embodiment, the sliding contact portion 6 is shaped like an elongated sphere with its major axis extending in the longitudinal direction of the electric wire W. However, the ratio of the major axis to the minor axis is not limited to the relationship shown in the embodiment. For example, deformations in which the major axis is approximately three times the minor axis are also included. That is, the sliding contact portion 6 can achieve the same effect as the configuration of the above embodiment as long as the longitudinal dimension of the electric wire W to be clamped does not exceed three times its radial dimension. With this configuration, when the radial dimension of the sliding contact portion 6 is set to approximately the same value as the inner diameter of the corrugated tube 100, the longitudinal dimension is formed so as not to exceed three times the inner diameter of the corrugated tube 100. This allows the electric wire W to be gripped over a relatively short area. Furthermore, the larger the ratio of the major axis to the minor axis, the larger the contact area, resulting in a more stable holding state of the electric wire W.

[0066] The corrugated tube installation aid of the present invention can stably hold the electric wire from a distance even if the sliding contact part that holds and guides the electric wire is compactly formed, and is therefore useful for installing protective tubes for electric wires that have an inconsistent routing pattern, not limited to high-voltage drop lines.

[0067] REFERENCE SIGNS LIST 1 Corrugated pipe installation aid 2 Main body 2a Grip portion 2b, 2c, 2d Groove portion 4 Connecting portion 6 Sliding contact portion 6a Storage opening 8 Slide rod 10 Operating lever 10a, 10d, 10e Claw portion 10b Handle 10c Link portion 12a, 12b, 12c Link pin 14 Link 16 Magnet 100 Corrugated pipe L1 One-dot chain line L2 Two-dot chain line P1 Fulcrum P2 Point of action W Electric wire

Claims

1. An auxiliary installation tool for an insulation protection bellows tube which accommodates an electric wire by inserting it through a slit formed in the longitudinal direction, comprising: a main body having a gripping portion; a sliding contact portion which accommodates a longitudinal portion of the electric wire and is capable of sliding within the bellows tube; a connecting portion which connects the sliding contact portion to the main body; an operating lever which is rotatably supported on the main body; and a slide rod which is slidably provided along the connecting direction of the connecting portion and which is connected to the operating lever so that the tip of the slide rod is crimped to the electric wire accommodated within the sliding contact portion by a rotating operation.

2. The bellows tube installation aid described in claim 1, characterized in that the slide rod is crimped onto the electric wire when the operating lever is positioned within the rotation range on the opposite side of the gripping portion via the rotation center.

3. An auxiliary attachment for a bellows tube as described in claim 2, characterized in that it comprises a claw portion provided on the operating lever and biased towards the center of rotation, and a groove portion formed on the main body facing the rotation area on the opposite side of the grip portion via the center of rotation, the groove portion engaging with the claw portion at a rotation position where the electric wire is crimped to the slide rod within the sliding contact portion.

4. An auxiliary attachment for a bellows pipe as described in claim 3, characterized in that the sliding contact portion has an accommodation opening for accommodating the electric wire formed facing the opposite side to the gripping portion.

5. An auxiliary attachment tool for a bellows pipe as described in claim 1, characterized in that the gripping portion has a rod-shaped portion extending in a direction perpendicular to the connecting direction of the connecting portion.

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