JP3370268B2 - Protective tube connection / disconnection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection tube used for engaging and disengaging a plurality of protection tubes connected to cover an outer circumference of an electric wire for protecting an imaginary electric wire. Regarding the mating / releasing device.

[0002]

2. Description of the Related Art When performing construction work in the vicinity of an imaginarily arranged electric wire, the outer circumference of the electric wire in the vicinity of the work site is prevented in order to prevent working equipment from directly touching the electric wire during the work. Is covered with a protective tube (so-called “poly tube”) formed of a resin material having elasticity and electrical insulation such as polyethylene resin.

As shown in FIGS. 6 to 8, the protective tube is composed of a main body portion 51 and a connecting portion 52. Body part 5
1 is formed into a cylindrical shape having an annular cross section, and the main body portion 5
A slit-shaped opening 51b is formed at one location extending in the axial direction (longitudinal direction), and a pair of main body side flanges 54a, 5a is provided from both ends of the slit-shaped opening 51b.
4b is formed. Then, the main body side flange portion 54a,
By opening 54b and inserting the electric wire into the internal space 51a of the main body 51, the outer circumference of the electric wire is covered and protected.

When the electric wire is protected over a wide area, the fitting groove (female fitting portion) 5 formed in the connecting portion 52 is used.
5, the fitting protrusion (male fitting portion) 53 'of another protective tube 50'
Protective tubes 50, 50 'by inserting and fitting
Are connected. In addition, the main body side flange portion 54 is also included in the connection portion 52.
Connecting portion side flanges 56a and 56b covering a and 54b are formed extending from the slit-shaped opening 52b.

The protection tube 50 is attached to the electric wire by using an aerial work vehicle 70 as shown in FIG. In this work platform 70, a swivel base 72 is arranged on a vehicle body 71, and a swingable and retractable boom 73 is attached to the swivel base 72. At the tip of the boom 73,
The workbench 77 and the arm mechanism 40 are attached via a vertical post, and the protection tube attachment device attached to the arm mechanism 40 attaches the protection tube 50 to the electric wire D.

The protective tube mounting device comprises a protective tube inserting mechanism 20 for feeding the protective tube 50 toward the electric wire D and a protective tube inserting guide 30 connecting the protective tube inserting mechanism 20 and the electric wire D. The protection tube 50 fed out by the mechanism 20 is guided from the protection tube insertion guide 30 to the outer circumference of the electric wire D and mounted.

The protection tube insertion mechanism 20 is a front side feeding mechanism 20a.
And the rear side feeding mechanism 20b, and each feeding mechanism 20a, 20b is provided with a brim portion 54, 5 of the protective tube 50.
It is configured to have a pair of rollers that feed the protective tube 50 by sandwiching 6 and rotating the same.

When connecting a plurality of protective tubes 50, first, when the fitting protrusion 53 'of the previous protective tube 50' exceeds the rear side feeding mechanism 20b, the feeding is stopped and the subsequent protective tube 50 is removed. Only the rear side feeding mechanism 20b feeds. As a result, the front protection tube 50 'is clamped by the front side feeding mechanism 20a and stopped, and the rear protection tube 50 is fed out. Therefore, the fitting projection 53' of the front protection tube 50 'and the rear protection tube 50' are protected. The fitting groove 55 formed in the connecting portion 52 of the pipe 50 is fitted,
The protective tubes 50, 50 'are firmly connected. And
By repeating this operation, the electric wire D can be protected by the protective tube 50 over a wide range.

Further, in this protective tube mounting apparatus, the protective tube 50 mounted on the electric wire D can be removed by reversing the rotation of the roller of the feeding mechanism 20. A protective tube engagement releasing mechanism is provided for releasing the fitting of the protective tubes 50 when the protective tubes 50 are removed. The protective tube engagement releasing mechanism is provided between the front side feeding mechanism 20a and the rear side feeding mechanism 20b,
The fitting can be released by performing the releasing operation in the state where the connecting portion 52 is located between the front and rear side feeding mechanisms 20a and 20b.

[0010]

However, in the protective tube mounting apparatus configured as described above, the final protective tube 50 is mounted on the electric wire D and the first protective tube 50 is removed from the electric wire D. It was difficult to move to the tube insertion mechanism 20.

That is, at the time of feeding the protective tube 50, the feeding force is not transmitted to the protective tube 50 after being fed from the front side feeding mechanism 20a. For this reason, when the last protection tube 50 is attached, a dummy protection tube is extended after the last protection tube 50, and the last protection tube 50 is pushed out by this dummy protection tube to push the electric wire D. To be attached to. The dummy protection tube is fed back and forth from the last protection tube 50 so as not to fit with the last protection tube 50. Then, when the last protective tube 50 is attached to the electric wire D, the rotation of the roller of the feeding mechanism 20 is reversed, and the dummy protective tube is pulled back and collected.

However, when the last protective tube 50 is mounted in this way, the tip of the dummy protective tube is not fitted to the last protective tube 50, and thus the last protective tube 5 is attached.
When pushing 0, the dummy protective tube is inserted into the protective tube insertion guide 3
It was easy to slip off from 0. Therefore, it is necessary for the worker to hold the dummy protective tube with a hot hand or the like, which causes a problem that the work is difficult.

When removing the protective tube 50, after fitting the dummy protective tube to the last protective tube 50 attached to the electric wire D, the rotation of the roller of the feeding mechanism 20 is reversed to protect the dummy. Pull the tube back. Here, the last protection tube 5
When fitting the dummy protection tube to 0, the last protection tube 50 is pushed out, so that the operator holds the last protection tube 50 with a hot hand or the like. However, there is a problem in that it is very difficult to fit the dummy protection tube because the protection tube 50 slips just by gripping the protection tube 50 with a hot hand.

The present invention has been made in view of such a problem, and the connection of the last protective tube at the time of mounting the protective tube and the release of the fitting at the time of removing the protective tube can be performed easily and It is an object of the present invention to provide a protective tube connecting / disconnecting device that can be reliably performed.

[0015]

In order to achieve the above object, the protective tube connecting / disconnecting device according to the present invention has a male fitting portion formed at the end of the first protective tube as a second protective member. It is used when connecting and disconnecting a protective tube attached to the outer periphery of an electric wire in a state where the female fitting section formed at the end of the tube is inserted and engaged and connected. Then, the slit-shaped opening formed in the female fitting portion and extending in the axial direction is expanded so that the engagement with the male fitting portion can be released. It is constructed so that one protective tube can be fixed.

This protective tube connecting / disconnecting device comprises an opening portion and a holding portion, and the opening portion is located in the slit-shaped opening portion while being inserted between the male fitting portion and the female fitting portion. The sandwiching portion is located outside the first protective tube while being inserted between the male fitting portion and the female fitting portion. Then, by performing the opening operation of the opening portion, the opening portion spreads the slit-shaped opening portion. Further, by performing the holding operation of the holding portion, the holding portion presses and deforms the first protective tube, and holds the electric wire together with the first protective tube.

According to the protective tube connecting / disconnecting device thus constructed, the engagement between the male fitting portion and the female fitting portion can be released by expanding the slit-shaped opening portion by the opening portion. it can. Further, by sandwiching the electric wire together with the first protective tube in the sandwiching portion, the first protective tube can be fixed so as not to move with respect to the electric wire. Therefore, by pulling only the second protective tube in this state, the fitting between the first protective tube and the second protective tube can be released.

Further, the protective tube connecting / disconnecting device according to the present invention is constituted by a swinging member composed of a first swinging member and a second swinging member which are pivotally supported by a pivot shaft and are capable of mutually swinging. Then, an opening portion is formed in front of the pivot shaft of the swing member, and a holding portion is formed behind the pivot shaft, and opening / closing operation means for opening / closing the opening portion and opening / closing the holding portion is provided. It is preferable to provide.

According to the protective tube connecting / disconnecting device constructed as described above, since the opening portion and the holding portion are formed by sandwiching the pivot shaft in the same swing member, the opening / closing operation of the opening / closing operation means. By performing the opening operation of the opening portion, the closing operation of the holding portion (holding operation) can be performed at the same time. Therefore, the configuration of the protective tube connecting / disconnecting device can be simplified.

Further, in the above protective tube connecting / disconnecting device, the opening / closing operation means is composed of the first nut and the second nut, and the screw rod screwed to the first nut and the second nut. It is preferable. Here, the first nut is disposed on the first swing member, the second nut is disposed on the second swing member, and the second nut is formed with a screw opposite to the first nut. With this configuration,
By rotating this screw rod, the first nut and the second nut can be moved closer to each other or separated from each other, so that the opening part and the holding part can be moved by performing only one operation (rotating the screw rod). Can be opened and closed.

[0021]

Preferred embodiments of the present invention will be described below with reference to the drawings. When the protective tube connecting / releasing device according to the present invention is used to attach / remove the protective tube 50 to / from the electric wire D, an aerial work vehicle 70 as shown in FIG. A protective tube mounting device provided on the workbench 77 of the work vehicle 70 is used. Here, the aerial work vehicle 70 and the protection tube insertion mechanism 20 and the protection tube insertion guide 30 which constitute the protection tube attachment device are shown in FIG.
Since it has the same configuration as the aerial work vehicle 70, the protection tube insertion mechanism 20, and the protection tube insertion guide 30 shown in FIG.

Next, the protective tube connecting / disconnecting device 10 will be described with reference to FIGS. 1 and 3 to 5. The protective tube connecting / disconnecting device 10 has a side surface shape of a substantially "V" shape.
Upper member (first swing member) formed by a single plate material
11 and a lower member (second swing member) 12, both members 11 and 12 are formed so as to be mutually swingable (like “scissors”) by a pivot shaft 13 at each bent portion. There is. The front portion (left side in FIGS. 3 and 4) of the pivot shaft 13 constitutes the opening portion 10a, and the rear portion of the pivot shaft 13 constitutes the holding portion 10b.

Opening plate supporting portions 11a and 12a are formed on both members 11 and 12 of the opening portion 10a, and the upper and lower opening plates 11b and 1a are formed on the opening plate supporting portions 11a and 12a, respectively.
2b is fixed. Further, an upper sandwiching member 11c and a lower sandwiching member 12c, which are formed of round bars and extend in the horizontal direction, are fixed to both members 11 and 12 of the sandwiching portion 10b.

An upper nut (first nut) 14 is rotatably supported by a support shaft 14a at the rear ends of both members 11 and 12 in the sandwiching portion 10b, and a support shaft 15a. A lower nut (second nut) 15 is pivotally supported by the lower member 12 so as to be rotatable. Female nuts 14b and 15b are formed through both nuts 14 and 15 in the vertical direction, but one female screw is formed as a reverse screw (left screw).

A screw rod 16 is screwed into the nuts 14 and 15 attached to the rear ends of the members 11 and 12 in this manner. The screw rod 16 can be screwed into the female screws 14b and 15b of the nuts 14 and 15, respectively.
And the lower half 16b form an opposite male screw. An engaging member 17 having an engaging protrusion 17a with which the tip of the hot hand H is engageable is fixed to the lower end of the screw rod 16.

According to the protective tube connecting / disconnecting device 10 thus constructed, after the engaging projection 17a of the engaging member 17 is inserted into the engaging groove Ha of the hot hand H and the both are engaged. By rotating the screw rod 16 by rotating the hot hand H to the left or right, the rear end of the upper member 11 and the rear end of the lower member 12 can be brought close to or separated from each other. . That is, by rotating the engaging member 17, the opening portion 10 is centered around the pivot shaft 13.
It is possible to open and close a and to open and close the holding portion 10b.

Next, the case where the protective tube 50 is attached to the electric wire D using the protective tube connecting / disconnecting device 10 will be described. When the protection tube 50 is attached, the protection tube insertion mechanism 20 is used as described above, and the plurality of protection tubes 50 are fitted and fed out. When the protective tube 50 is attached to the electric wire D using the connection / disconnection device 10, the connecting portion 52 side of the protective tube 50 is extended toward the electric wire D.

Then, in addition to the last protective tube 50 ', another dummy protective tube 50 is fitted. At this time,
Collar portions 54a, 54 of the main body portion 51 of the dummy protective tube 50
b is clamped at least by the rollers of the front-side feeding mechanism 20a in the protective tube insertion mechanism 20.

After fitting the dummy protection tube 50 in this manner, as shown in FIGS. 1, 4 and 5, (in FIGS. 1 and 4, the direction of the protection tube 50 is opposite to that in FIG. 2). The main body portion 51 'of the last protective tube 50' is located between the upper and lower clamping members 11c and 12c, and the connection portion side flange portion 56 of the dummy protective tube 50 is provided.
Protect the fitting part (between the connection part 52 and the main body part 51 ') between the last protection pipe 50' and the dummy protection pipe 50 so that the upper and lower opening plates 11b, 12b are located between the a and 56b. Insert the tube connecting / disconnecting device 10.

In the protective tube connecting / disconnecting device 10, as shown in FIG. 3, FIG. 4 and FIG.
In the closed state, there is a predetermined gap between the upper and lower opening plates 11b and 12b. When the connection / disconnection device 10 is inserted between the protective tubes 50 and 50 'as described above, the main body side brim portion 54
The a and 54b are located between the upper and lower opening plates 11b and 12b.

From such a state, the operator boarding the workbench 77 rotates the hot hand H to engage the engaging member 1
Rotate the threaded rod 16 via 7. As described above, since the reverse thread is formed in half of the threaded rod 16, when the threaded rod 16 is rotated, as shown in FIG.
And the holding portion 10b closes (from the state shown in FIGS. 3, 4 and 5, even if the screw rod 16 is rotated in the direction of closing the opening portion 10a, the lower nut member 15
And the engaging member 17 interfere with each other, so that the further opening 10
The closing operation of a is not performed).

As described above, when the screw rod 16 is rotated in the direction of opening the opening 10a with the protection tube connecting / disconnecting device 10 inserted between the protection tubes 50 and 50 ', the opening 10a is , The connection side flange 56a in the dummy protective tube 50 by the double plate supporting portions 11a, 12a,
56b is pushed up to spread the slit-shaped opening 52b, and the engagement between the fitting protrusion 53 'of the last protective tube 50' and the fitting groove 55 of the dummy protective tube 50 is released.

In the holding portion 10b, the main body portion 51 'of the last protective tube 50' is pressed and deformed (crushed) by the upper and lower holding members 11c and 12c. Here, since the electric wire D is located in each protective tube 50, 50 ', the electric wire D is sandwiched by the upper and lower clamping members 11c, 12c with the main body 51' sandwiched therebetween. As a result, the last protective tube 50 'is fixed to the electric wire D at this portion.

When the hot hand H is rotated to rotate the screw rod 16 in this manner, the protective pipe is connected and
A force acts in the direction of rotating the entire release device 10. However, the outer end portions of the double-sided plate supporting portions 11a and 12a have
Stoppers 11d and 12d extending upward and downward respectively are formed, and in a state where the connection / disconnection device 10 is inserted between the protection tubes 50 and 50 ', the stoppers 1d and 12d are formed.
1d and 12d are located inside the connecting portion side brim portions 56a and 56b in the dummy protective tube 50. For this reason,
Even if a force for rotating the protective tube connecting / disconnecting device 10 is applied, the stoppers 11d and 12d are caught, so that the protective tube connecting / disconnecting device 10 does not come off from the fitting portion of the protective tube.

Further, in the protective tube connecting / disconnecting device 10 configured as described above, even if the operator removes his / her hand from the hot hand H in a state in which the opening 10a is opened and the holding portion 10b is closed, Screw rod 16 and each nut 14, 15
The opening portion 10a will not be closed and the holding portion 10b will not be opened due to the friction with the.

In this way, the engagement between the last protection tube 50 'and the dummy protection tube 50 is released, and the protection tube insertion mechanism 20 is driven from the state in which the last protection tube 50' is fixed to the electric wire D. Then, the dummy protective tube 50 is pulled out to operate only the dummy protective tube 50 by the electric wire D.
Can be removed from.

At this time, the engagement between the fitting protrusion 53 'of the last protective tube 50' and the fitting groove 55 of the dummy protective tube 50 is not completely released but partially engaged. However, since the last protection tube 50 'is fixed to the electric wire D, if the dummy protection tube 50 is taken, the last protection tube 5'
0'is not taken over with the last protection tube 5
The fitting between 0'and the dummy protection tube 50 can be released.

After the last protective tube 50 'and the dummy protective tube 50 have been disengaged, the hot hand H is rotated in the opposite direction so as to be fixed to the electric wire D by the holding members 11c and 12c. And disconnecting the protection tube connecting / disconnecting device 10 from the last protection tube 50 '. As described above, since the protective tube 50 'is formed of an elastic material such as polyethylene resin, the portion deformed by being pressed by the sandwiching portion 10b should be detached from the protective tube connecting / disconnecting device 10. To restore the original shape.

Next, a case where the protective tube 50 is removed from the electric wire D by using the protective tube connecting / disconnecting device 10 will be described. When removing the protective tube 50, first,
Upper clamping member 11c in connection / disconnection device 10 for protective tube
The main body portion 51 'of the last protection tube 50' attached to the electric wire D is positioned between the lower holding member 12c and the lower holding member 12c. And
Similarly to the above, by rotating the hot hand H, the clamping operation of the electric wire D in the clamping unit 10b (fixing to the electric wire D) is performed.

In this way, the protective tube connecting / disconnecting device 1
0 is used to fix the main body portion 51 'and the electric wire D in the last protective tube 50', and the dummy protective tube 50 is fed out by using the protective tube inserting mechanism 20.
To fit. At this time, the last protective tube 50 'is the electric wire D
Since the dummy protective tube 50 is fixed to the dummy protective tube 50, the dummy protective tube 50 does not move even if it is pushed, and the dummy protective tube 50 can be reliably fitted to the last protective tube 50 '.

When the dummy protective tube 50 is fitted in this way, the protective tube connecting / releasing device 10 serves only to fix the last protective tube 50 'to the electric wire D by the holding portion 10b. Since it is used, it is not necessary to position the opening portion 10a in the connection portion 52 as in the case of the release.

The main body 51 of the dummy protective tube 50 in such a fitted state is located in the protective tube inserting mechanism 20. Therefore, by rotating the hot hand H in the reverse direction, the fixing to the electric wire D by the holding portion 10b is released, and after the protective tube connecting / disconnecting device 10 is detached from the main body 51, the rotation of the roller of the feeding mechanism 20 is performed. By reversing, the protective tube 50 attached to the electric wire D can be sequentially removed.

The above-mentioned protective pipe connecting / disconnecting device 10
In the above, the nuts 14 and 15 and the screw rod 16 constitute the opening / closing operation means described in the claims, and the screw rod 16
Although the opening portion 10a and the holding portion 10b are configured to be opened and closed together by rotating, the present invention is not limited to such a configuration. For example, a telescopic cylinder may be provided instead of the threaded rod, and the opening / closing operation of the opening portion 10a and the holding portion 10b may be performed by the telescopic operation of the telescopic cylinder.

Further, the opening portion 10a and the sandwiching portion 10b do not necessarily have to be formed in the same member and operated together, and they may be formed separately and independently opened and closed. Good.

[0045]

As described above, the protection tube connection and
The releasing device is composed of an opening portion and a holding portion.When the opening portion is opened, the opening portion spreads out the slit-shaped opening, and when the holding portion is held, the holding portion holds the electric wire. The first protection tube, which is the last protection tube attached to, is pressed and deformed, and the electric wire is clamped together with the first protection tube. As a result, the male fitting portion and the female fitting portion are disengaged from each other by the opening portion, and the first protective tube is fixed so as not to move by the sandwiching portion. You can easily disconnect the connection between the first protection tube and the second protection tube by pulling.

In the protective tube connecting / disconnecting device of the present invention, it is preferable that the opening portion and the holding portion are formed by sandwiching the pivot shaft in the same swing member. With such a configuration, by performing one opening / closing operation in the opening / closing operation means, it is possible to perform the holding operation of the holding section together with the opening operation of the opening section, and thus the configuration can be simplified.

Further, in the protective tube connecting / disconnecting device of the present invention, the opening / closing operation means is composed of the first nut and the second nut having a reverse thread to the first nut, and the first nut and the second nut. It is preferably composed of a screw rod to be screwed. With such a configuration, if the screw rod is rotated, the first nut and the second nut can be brought close to or apart from each other, and therefore the opening portion can be simply rotated. And the sandwiching part can be opened and closed at the same time. Further, due to the friction between the first and second nuts and the screw rod, the opening portion does not close and the holding portion does not open even if a separate stopper is not provided.

[Brief description of drawings]

FIG. 1 is a side view of a protective tube connecting / disconnecting device according to the present invention.

FIG. 2 is a perspective view showing a state in which protective tube connecting / releasing work is being performed using the protective tube connecting / releasing device.

FIG. 3 is a side view of the connection / disconnection device for the protective tube.

FIG. 4 is an IV in FIG. 3 of the protective tube connecting / disconnecting device.
FIG.

[Fig. 5] V in Fig. 4 of the protective tube connecting / disconnecting device
FIG.

FIG. 6 is a front view and a side view of a protective tube.

FIG. 7 is a sectional view of this protective tube.

FIG. 8 is a sectional view of the protective tube.

FIG. 9 is a perspective view showing a state in which a work of connecting and disconnecting a conventional protective tube is being performed.

[Explanation of symbols]

10 Protective tube connection / disconnection device 20 Protective tube insertion mechanism 30 Protection tube insertion guide 50 protective tube 70 Aerial work vehicle D electric wire H hot hand

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Mori 1052, 1152 Yamashita, Ryoke, Ageo City, Saitama Prefecture Aichi Corporation Ageo Plant, Inc. (72) Fumio Watanabe 1152 Yamashita, Ageo City, Ageo City, Saitama Prefecture No. 10 Aichi Corporation Co., Ltd. Ageo Factory (56) References Japanese Patent Laid-Open No. 8-149641 (JP, A) Japanese Patent Laid-Open No. 5-252627 (JP, A) Actual 3-Head 3-74114 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02G 1/02 H02G 7/00

Claims (3)

(57) [Claims] 1. A male fitting portion formed at the end of the first protective tube is inserted into and engaged with a female fitting portion formed at the end of the second protective tube, and is connected to the outer circumference of the electric wire. In the protective tube to be mounted, the slit-shaped opening formed in the female fitting portion extending in the axial direction is expanded to release the engagement with the male fitting portion, and at the same time with respect to the electric wire, (1) A protective tube connecting / releasing device for fixing a protective tube, comprising: an opening portion located in the slit-shaped opening portion in a state of being inserted between the male fitting portion and the female fitting portion; It comprises a sandwiching portion located outside the first protective tube in a state of being inserted between a fitting portion and the female fitting portion, and by performing an opening operation of the opening portion, the opening portion is By pushing the slit-shaped opening wide and performing the holding operation of the holding portion, the first protection is performed by the holding portion. A connection / disconnection device for a protective tube, characterized in that the tube is pressed and deformed to sandwich the electric wire together with the first protective tube. 2. The opening portion is formed in front of the pivot shaft in a rocking member that is pivotally supported by a pivot shaft and includes a first rocking member and a second rocking member that are rockable relative to each other. The holding portion is formed behind the pivot shaft of the swing member, and has opening / closing operation means for performing opening / closing operation of the opening portion and opening / closing operation of the holding portion. Item 1
The protective tube connecting / disconnecting device described in. 3. The opening / closing operation means includes a first nut arranged on the first rocking member and a screw opposite to the first nut arranged on the second rocking member. A second nut and a screw rod screwed to the first nut and the second nut, and the opening portion and the sandwiching portion are opened and closed by rotating the screw rod. The protective tube connection / disconnection device described in 2.