JP3113297U - Auxiliary connection device for cable extraction in cable pipelines - Google Patents

Abstract

Provided is a connection auxiliary device capable of easily and securely engaging and fixing a connecting cup member with a pulling traction device at a cable end when a cable is pulled out from a cable conduit.
A cup member having a cylindrical cup shape that can be attached to a cable end C1, and a plurality of pin driving holes 3 formed in the end wall thereof, and the cup member 1 to the cable end C1. In the state of being attached, it comprises a pin nail-like engaging pin 5 that can be screwed from the pin driving hole 3 to a position engaging with the end wall with respect to the cable end C1. C1 can be engaged and fixed to the cup member 1.
[Selection] Figure 3

Description

  The present invention relates to a connection assistance device for pulling out a cable used to connect a pulling traction device to the end of a cable when pulling out a cable such as a remaining cable of an underground cable conduit that is left as a dead line. It is.

  When the use of communication cables laid in underground cable pipelines is abolished, they are often cut off at connection and branch manholes and left as they are. This is called a remaining cable.

  In recent years, when a new cable such as an optical cable is laid, an existing cable conduit is used. At this time, if the remaining cable as described above exists in the existing cable conduit, it is necessary to pull out and remove it. However, since the remaining cable has been embedded and used for many years, it is often in a state of being in close contact with the inner surface of the pipeline due to mud, dirt, rust, or the like. Therefore, a pulling device or a pulling device using a winch or a jack is used for pulling out the cable.

  As a cable pulling device, there is a combination of a cable chuck that holds the cable end and a jack device as in Patent Document 1, but in this case, the cable pulling device is provided around the cable end protruding from the pipe line. It is necessary to have a space in which the apparatus can be set and the cable end portion has a predetermined length, and the usable range is limited. In particular, when the corroded portion at the end of the cable is cut and the length is short, the cable cannot be used.

  Therefore, when the space around the cable end is small, or when the length of the cable end is short, the pulling traction device is connected using a simple connecting member that can be fixedly attached to the cable end. Often to do.

  For example, as shown in FIGS. 8 to 10, a connection cup member 51 having a large number of pin driving holes 53, fixing resin injection holes 54, and fastening bolt holes 59 in the end wall 52 is used. With the member 51 attached to the cable end C1, a number of anchor pins 55 are driven by the hammer 60 to tighten the cable end C1 from the pin driving hole 53, and the cable end C1 is tightened by the pump 56 or the like. By injecting and solidifying the resin, the cup member 51 is fixed to the cable end C 1, and the connecting member 58 in which the steel rod 57 for traction is fixed to the cup member 51 is bolted to the cup member 51. By doing so, the traction device is connected.

  However, the driving of the anchor pin 55 is not easy because it is a driving operation with the hammer 60 in a relatively narrow manhole, and it becomes harder as the number of driving increases. It will take. Furthermore, it is necessary to wait for the injection resin to solidify, which is an inefficient operation. Moreover, since it hardens with resin, there also exists a problem that the said cup member and an anchor pin cannot be reused.

  The present invention has been made in view of the above, and when pulling out a cable such as a cable remaining in a cable conduit, a cup member for connection with a pulling traction device needs to be easily and resin-injected into a cable end. It is an object of the present invention to provide a connection auxiliary device that can be reliably engaged and fixed without increasing the operating efficiency.

  The present invention for solving the above-mentioned problems is a connection auxiliary device used for connecting a pulling traction device to a cable end when pulling out a cable of a cable conduit, and can be attached to the end of the cable. A connecting cup member having a cylindrical cup shape and a plurality of pin driving holes formed on the end wall thereof, and the pin driving hole in a state where the cup member is attached to the end of the cable. It consists of a nail-like engagement pin that can be screwed to a position where it engages with the end wall with respect to the cable end portion, and the cable end portion can be engaged and fixed to the cup member by screwing the plurality of engagement pins. It is characterized by doing so.

  According to the auxiliary connecting device, the connecting cup member is attached to the end of the cable from the pin driving hole having the plurality of screw-like engaging pins on the end wall of the cup member. Screw in the cable end and tighten the cable end. In particular, the engagement pin can be easily screwed using an electric tool such as an electric screwdriver. At this time, it is possible to predict the tensile strength with the required torque of the electric tool.

  In addition, by screwing the engagement pin, the engagement pin engages with the wire in the cable so that the thread portion bites into the cable at the end of the cable. Can be firmly engaged and fixed without slipping, slippage during pulling can be regulated, and pulling can be reliably performed. Further, since no resin is used as described above, the waiting time for solidifying the conventional resin can be made unnecessary, and the working time can be shortened. Furthermore, since no resin is used, the connecting cup member and the engaging pin can be reused.

  In the end wall of the cup member, a plurality of types of pin driving holes having different diameters are arranged and formed, and a plurality of types of engaging pins having different diameters are provided correspondingly. preferable. Thereby, by appropriately combining a plurality of types of engagement pins with different diameters, the engagement pins can be screwed in all over the entire cross section of the cable end, and the entire cable end is tightened substantially uniformly and strongly. The outer peripheral surface is brought into pressure contact with the inner peripheral surface of the cup member, and can be reliably engaged and fixed. Therefore, the effect of the slip restriction | limiting at the time of extraction can be improved, and the connection effect with an extraction apparatus can be enlarged.

  On the end wall side of the cup member, a screw is formed on the outer periphery of the end portion as a connecting portion for connecting a pulling adapter of the pulling pulling device, and the pulling adapter is screwed to the screw portion. It is provided freely. As a result, the adapter for traction can be easily and reliably coupled by screwing operation, can be easily connected to the traction device, and can be easily pulled out. In addition, since a screw hole for screwing a connection bolt as in the prior art becomes unnecessary, a pin driving hole for screwing the engagement pin can be formed in this portion, and the screw for screwing the engagement pin can be formed. The number of the cables can be increased and the entire cable end can be screwed at a substantially equal interval, and the coupling can be more firmly engaged.

  As described above, according to the connection assistance device for pulling out a cable according to the present invention, the connection operation between the cable end to be pulled out and the pulling towing device can be simplified, and it is not necessary to be solidified by a resin. Can be engaged and connected securely. Therefore, the labor required for pulling out the cables such as the remaining cables can be greatly reduced.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  FIG. 1 is a perspective view showing a connection cup member and an engagement pin of an embodiment of a connection assistance device for pulling out a cable according to the present invention. 2 is a front view of the connection cup member, FIG. 3 is a cross-sectional view of the connection cup member, FIG. 4 is a side view illustrating the traction adapter, and FIGS. It is sectional explanatory drawing of the connection operation state of the adapter for a traction.

  The connection auxiliary device of the present invention connects a pulling traction device (not shown) using a jack or the like to the end C1 of the cable when pulling out the cable C such as a remaining cable of the underground cable conduit P, for example. This is a combination of a connecting cup member 1 as shown in the figure and a required number of nail-like engaging pins 5.

  The cup member 1 has a cylindrical cup shape that can be attached to the cable end C1, and, as shown in FIG. 2, the end wall 2 has a substantially uniform arrangement over substantially the entire region. A large number of pin driving holes 3 that can penetrate the engaging pins 5 are formed. In the case of the figure, as the pin driving hole 3, a plurality of types of pin driving holes 3a, 3b, 3c having different diameters are formed. Specifically, three types of circular holes 3a, 3b, and 3c having a large diameter, a medium diameter, and a small diameter are formed. A plurality of holes 3b are formed on the concentric circle, and the smallest diameter hole 3c is formed on the outer concentric circle so as to be displaced from the medium diameter hole 3b. It is formed as follows. The medium-diameter holes 3b and the small-diameter holes 3c may be alternately arranged on a concentric circle. The number, diameter, and arrangement of these pin driving holes 3 (3a, 3b, 3c) can be appropriately set according to the area of the end wall 2 and the like, and are formed so as to have an even arrangement as a whole. .

  The engaging pin 5 is a screw nail having a required length that can be screwed into the internal cable end C1 through the driving hole 3 in a state where the cup member 1 is attached to the cable end C1. It has a shape and has a head 15 that is locked to the end wall 2. This engagement pin 5 is also composed of a plurality of types of pins 5a, 5b, 5c having different diameters corresponding to the pin driving holes 3 (3a, 3b, 3c), for example, as shown in FIG. These are provided so that they can be screwed through the three types of pin driving holes 3a, 3b, and 3c having a large diameter, a medium diameter, and a small diameter, respectively. The engaging pins 5 (5a, 5b, 5c) have at least the same number as the pin driving holes 3 (3a, 3b, 3c).

  The length of the engaging pin 5 (5a, 5b, 5c) can be set as appropriate, but at least the length of the cylindrical portion of the cup member 1 is at least as long as the end of the cable inside the cup member 1. It is preferable from the viewpoint of the tightening effect of C1. The three types of engagement pins 5a, 5b, and 5c may have different lengths.

  Further, on the end wall 2 side of the connection cup member 1, a screw is formed on the outer periphery of the end portion as a connection portion for connecting the traction adapter 6 provided in the pulling traction device. On the other hand, the pulling adapter 6 is provided so as to be screwed together.

  As illustrated in FIG. 4, the traction adapter 6 mainly includes a cup-shaped portion 6 a in which a screw that can be screwed to the screw portion 4 is formed on the inner periphery, and is attached to an end portion of the cup-shaped portion 6 a. A locking member 6c that can lock a hook member on the side of the traction device (a) in FIG. 3 or a traction member 6b such as a steel rod or steel material connected to the traction device is provided. (B) in the figure.

  When using the above-described connection assisting device for pulling out the cable C such as the remaining cable of the cable conduit P, first, the connecting cup member 1 is connected to the cable end C1 exposed in the manhole or the like. The cable tip is fitted and attached to a position where it abuts against the end wall 2 of the cup member 1 (FIG. 5). At this time, it is applied using a hammer if necessary. Further, when the cable end C1 is corroded, the corroded portion is cut out, and when the shape of the cable end is deformed, the cable end C1 is corrected to be substantially circular.

  Then, from the pin driving hole 3 of the cup member 1, the engagement pin 5 corresponding to each diameter is connected to the cable end C <b> 1 in the cup member 1 until the head 15 is locked to the end wall 2. The cable end C1 is tightened inside the cup member 1 (FIG. 6). At this time, when three types of engagement pins 5a, 5b, 5c are used, first, the large-diameter engagement pin 5a is screwed into the pin driving hole 3a at the center of the end wall 2, and then the medium-diameter engagement pin 5a is engaged. The joint pin 5b is screwed from the medium diameter pin driving hole 3b, and the small diameter engaging pin 5c is screwed from the small diameter pin driving hole 3c, so that the entire cable end C1 is tightened substantially uniformly and strongly. The cup member 1 is engaged and fixed.

  This engagement pin 5 (5a, 5b, 5c) can be screwed in using, for example, an electric tool 7 such as an electric screwdriver, and as a result, compared to the case where the anchor pin is driven by a conventional hammer, It can be screwed easily and in a short time. Moreover, by screwing the engagement pin 5 (5a, 5b, 5c) in this way, the engagement pin 5 (5a, 5b, 5c) is threaded with respect to the wire in the cable C at the cable end C1. Since the portions bite into and engage with each other, they can be securely and firmly engaged and fixed without solidifying by conventional resin injection.

  Next, it is only necessary to screw and connect the traction adapter 6 to the screw portion 4 as the connecting portion at the end of the cup member 1 (FIG. 7), thereby making the traction device easy and strong. It is possible to connect, the time required for this connection can be greatly shortened, and labor can be reduced.

  In this way, the cable C in the cable conduit P is pulled out. At this time, the engagement pin 5 (5a, 5b, 5c) is securely and firmly engaged and connected as described above. Even if resin injection is not used, it can be reliably pulled out without fear of slipping or coming off, and its working efficiency can be improved.

  Then, after completion of the above-described extraction, if the cup pin 1 is removed from the cable end C1 by using the electric tool 7 such as an electric screwdriver, the engagement pin 5 is rotated in the reverse direction and extracted, the cable is re-extracted. Will be available.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for a difference in connecting a cable end portion to a pulling traction device in a cable pulling operation such as a remaining cable of a cable pipe buried underground.

It is a perspective view which shows the connection cup member and engagement pin of 1 Example of the connection assistance apparatus for cable drawing of this invention. It is a front view of the cup member for connection same as the above. It is sectional drawing of the cup member for connection same as the above. (A) (b) It is a side view which illustrates the adapter for a traction, respectively. It is a section explanatory view before attaching the connecting cup member for cable extraction. It is sectional explanatory drawing at the time of attaching the connection cup member same as the above and screwing an engagement article. It is sectional drawing of the state which couple | bonded the adapter for a traction with the connection cup member same as the above. It is sectional explanatory drawing which shows the coupling operation state of the conventional connection cup member. It is sectional explanatory drawing of the resin injection state same as the above. It is sectional explanatory drawing of the state which connects the connecting member for a traction to the connection cup member same as the above.

Explanation of symbols

  C ... Cable, C1 ... Cable end, P ... Cable conduit, 1 ... Connecting cup member, 2 ... End wall, 3 (3a, 3b, 3c) ... Pin driving hole, 4 ... Threaded part, 5 ( 5a, 5b, 5c) ... engaging pin, 6 ... adapter for traction, 6a ... cup-shaped part, 6b ... traction member, 15 ... head.

Claims (3)

A connection auxiliary device used to connect a pulling traction device to a cable end when pulling out a cable in a cable line,
A connecting cup member having a cylindrical cup shape that can be attached to the end portion of the cable and a plurality of pin driving holes formed in the end wall thereof, and the cup member attached to the end portion of the cable In this state, the pin is provided with a nail-like engagement pin that can be screwed to the position where it engages with the end wall with respect to the cable end from the pin driving hole. A connection auxiliary device for pulling out a cable from a cable conduit, wherein the connection can be fixed to the cup member.   The end wall of the cup member is provided with a plurality of types of pin driving holes having different diameters, and a plurality of types of engaging pins having different diameters corresponding thereto. Auxiliary connection device for pulling out the cable conduit described in 1. On the end wall side of the cup member, a screw is formed on the outer periphery of the end portion as a connecting portion for connecting a pulling adapter of the pulling pulling device, and the pulling adapter is screwed to the screw portion. The connection auxiliary device for pulling out a cable from a cable conduit according to claim 1, which is provided freely.

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