JP5096976B2 - Cable protection tube - Google Patents

Description

  The present invention relates to a cable protection tube used for protecting a communication cable such as a telephone line.

  Conventionally, a communication cable such as a telephone line is composed of, for example, a plurality of trunk cables and a plurality of lead-in cables. A trunk cable is used to connect telephone offices. The lead-in cable is branched from the main line cable and is used to lead into a building such as a house or a store. In order to maintain the scenery of the road, these cables are embedded under the road surface of the road using, for example, a cable protection tube 10 described in Patent Document 1.

The cable protection tube 10 includes a tube member 11 and a separator 15. The separator 15 is inserted into the tube member 11 and has a separator body and a pair of pressing portions 18 and 18. The pressing portions 18 and 18 press the left and right portions of the inner surface 11 a of the tube member 11. Thus, the separator main body divides the inside of the pipe member 11 into upper and lower parts to form two cable housing spaces 19 and 20, and the trunk cable 13 is housed in the lower housing space 19, and the upper housing is housed. The lead-in cable 14 is accommodated in the space 20.
Japanese Unexamined Patent Publication No. 2007-74885 (FIG. 1)

  However, the pressing portions 18 and 18 of the separator 15 press the left and right portions of the inner surface 11 a of the tube member 11 even when the operator inserts the separator 15 into the tube member 11. For this reason, since the insertion resistance of the separator 15 is increased, there is a problem that the operation of inserting the separator 15 becomes difficult.

  This invention is made | formed in view of this conventional subject, and it aims at providing the cable protective tube which can improve the insertion workability | operativity of a separator.

  In order to solve the above-mentioned problem, the cable protection tube according to claim 1 of the present invention is provided with an insertion resistance reduction means on at least one of the separator and the pipe member, and the insertion resistance reduction means The contact area between the pair of pressing portions of the separator and the inner surface of the tube member is reduced to suppress the frictional resistance generated between them, or the separator body is folded so that it can be restored to its original shape. A frictional resistance is not generated between the pair of pressing portions and the inner surface of the tube member.

Further, the cable protection tube according to claim 2 of the present invention is the cable protection tube according to claim 1, wherein a predetermined portion of the separator body is provided with a bending means constituting the insertion resistance reducing means, The bending means includes a concave portion and a convex portion formed by cutting out one of the upper and lower sides of the predetermined portion so as to be engaged in the left-right direction inside the predetermined portion. The predetermined portion is bent up and down to the other side so that a frictional resistance does not occur between the pressing portion and the inner surface of the tube member, and the convex portion is removed from the concave portion so that the separator is bent. In this state, the predetermined portion is pushed from one side of the upper and lower sides to the other side, and the convex portion is fitted in the concave portion. By Murrell, it is characterized by being configured such that the pair of pressing portions is returned to the separator body to its original shape to press the right and left side portions of the inner surface of the tube member.

The cable protection tube according to claim 3 of the present invention is the cable protection tube according to claim 2 , wherein the bending means is provided in an intermediate portion of the separator body, and the separator is disposed at the intermediate portion. It is characterized by being configured to be bent and to return to its original shape from this state.

Moreover, the cable protection tube according to claim 4 of the present invention is the cable protection tube according to any one of claims 1 to 3 , wherein the left and right portions of the inner surface of the tube member include the A pair of protrusions for determining the insertion position of the separator are formed, and the pair of pressing portions are formed to extend downward from the left and right ends of the separator body, while each pressing portion is a corresponding protrusion of the tube member. An inner bent portion formed by bending a predetermined portion inwardly so as to be fitted to the inner portion, and a predetermined portion on the lower side of the inner bent portion projecting inward so as to extend parallel to the axial direction of the tube member. An inner projection formed on the sheath tube when the sheath tube accommodated in the vicinity of the inner projection in the cable housing space below the pipe member jumps up. Abut with the separator body By using a lifting force, the space between the pressing portion having the inner protrusion and the separator body is widened so that the pressing portion further presses the inner surface of the tube member. .

  In the cable protection tube according to claim 1 of the present invention, the insertion resistance reducing means is provided in at least one of the separator and the tube member. Thereby, when the separator is inserted, the contact area between the pressing portion and the inner surface of the pipe member is smaller than before, and the frictional resistance generated between the two is suppressed or the frictional resistance is generated between the two. Absent. Therefore, the cable protection tube according to claim 1 can improve the insertion workability of the separator.

In the cable protection tube according to claim 2 of the present invention, the separator body is provided with a bending means. Therefore, if the operator uses the bending means and inserts the separator in the folded state, the frictional resistance does not occur. Therefore, the cable protection tube of Claim 2 can improve the workability | operativity of a separator reliably.

Even if the separator is arranged in a folded state inside the tube member, the operator can restore the separator by pushing down or pushing up a predetermined portion of the separator body provided with the bending means. Therefore, the cable protection tube of Claim 2 can also improve the recovery workability | operativity after separator insertion.

Furthermore, in the cable protection tube according to claim 3 of the present invention, since the bending means is provided in the intermediate portion of the separator body, the operator can perform the restoration work of the separator without being obstructed by the inner surface of the tube member. . Therefore, the cable protection tube according to claim 3 can further improve the restoration workability after inserting the separator.

Moreover, in the cable protection tube of Claim 4 of this invention, the inner side protrusion was formed in the press part of a separator. Thereby, even if the sheath pipe accommodated in the vicinity of the inner projection in the lower cable housing space jumps up, the inner projection and the separator main body come into contact with the sheath pipe, so that the pressing portion having the inner projection is provided. And the separator body are widened, and the pressing portion further presses the inner surface of the pipe member. Therefore, even if the sheath tube jumps up, the inner bent portion of the pressing portion does not come off from the projection of the tube member. Therefore, the cable protection tube according to claim 4 can prevent the separator from being detached from the tube member even if the sheath tube jumps up.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First embodiment:
FIG. 1 is a longitudinal sectional view of a cable protection tube 1 showing a first embodiment of the present invention. The cable protection tube 1 accommodates and protects a communication cable C such as a telephone line, and includes a tube member 2, a separator 3, and a plurality of sheath tubes 4. The communication cable C includes a plurality of trunk cables C1 and a plurality of lead-in cables C2.

  The tube member 2 is formed of a synthetic resin material, and a projection 21 that determines the insertion position of the separator 3 extends in the length direction of the tube member 2 in the middle of the left and right side portions of the inner surface 2a. Yes.

  The separator 3 is a member that divides the inside S of the pipe member 2 into upper and lower parts and forms an accommodation space Sa for the main line cable C1 and an accommodation space Sb for the lead-in cable C2. The separator 3 is formed in a plate shape from a synthetic resin material, and includes a separator main body 31 and a pair of leg portions (pressing portions) 32 and 32.

  The separator body 31 is a part that divides the inside S of the pipe member 2. The separator body 31 extends to the left and right of the pipe member 2 and includes a flat portion 311 that is an intermediate portion and a pair of inclined portions 312 and 312. The inclined portions 312 and 312 are formed to extend obliquely upward from the left and right ends of the flat portion 311.

  On the other hand, the leg portions 32 and 32 are curved downward from the tips of the inclined portions 312 and 312, and are supported by the inner surface 2 a by pressing the left and right portions of the inner surface 2 a of the pipe member 2.

  Further, as shown in FIG. 2, an inner bent portion 321 is provided on the upper portion of each leg portion 32. The inner bent portion 321 is bent inward of the leg portion 32, and the projection 21 of the tube member 2 is fitted to the inner bent portion 321. The outer surface 32a of each leg 32 is in contact with the inner surface 2a of the tube member 2, and a plurality of grooves 322 which are insertion resistance reducing means of the present invention are formed on the outer surface 32a.

  The plurality of grooves 322 are arranged side by side so as to be parallel to the axial direction of the pipe member 2. Specifically, the plurality of grooves 322 are arranged on the outer surface 32 a between the upper end of the leg portion 32 and the inner bent portion 321 and on the outer surface 32 a between the inner bent portion 321 and the lower end of the leg portion 32. ing. The cross-sectional shape of each groove 322 is a semicircular shape. Note that the number and shape of the grooves need not be limited to the present embodiment.

  The installation operation of the separator 3 in the cable protection tube 1 configured as described above will be described. The operator holds the separator 3 and inserts the separator 3 into the inside S of the tube member 2 while fitting the inner bent portions 321 and 321 of the leg portions 32 and 32 into the protrusions 21 and 21 of the tube member 2. At this time, due to the plurality of grooves 322 provided in the leg portions 32 and 32, the contact area between the leg portions 32 and 32 and the inner surface 2 a of the pipe member 2 is smaller than in the conventional case, so that the friction generated between both Resistance is suppressed. Therefore, the cable protection tube 1 of the present embodiment can improve the workability of inserting the separator 3. Furthermore, in this cable protection tube 1, since the insertion resistance reducing means of the present invention is configured with a simple one such as the groove 322, the manufacturing cost can be reduced.

Second embodiment:
FIG. 3 is a vertical cross-sectional view of an intermediate portion on the left side of the cable protection tube 10 showing the second embodiment of the present invention. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and different parts are mainly described. In the following embodiments, the same portions as those in the first embodiment and the other embodiments are denoted by the same reference numerals, and different portions will be mainly described.

  In the present embodiment, a plurality of protrusions 522 that are means for reducing insertion resistance according to the present invention are formed on the outer surfaces 52 a of the leg portions 52, 52 of the separator 5. The plurality of protrusions 522 are arranged side by side so as to be parallel to the axial direction of the pipe member 2. Specifically, the plurality of protrusions 522 are disposed on the outer surface 52a of the upper end portion of the leg portion 52 and the outer surface 52a between the inner bent portion 321 and the lower end of the leg portion. The cross-sectional shape of each protrusion 522 is a semicircular shape. Note that the number and shape of the protrusions are not necessarily limited to this embodiment.

  In the cable protection tube 10 configured as described above, when the operator inserts the separator 5 into the interior S of the tube member 2, the legs 52 are formed by the plurality of protrusions 522 provided on the legs 52 and 52. , 52 and the inner surface 2a of the pipe member 2 and the contact area are smaller than in the prior art, so that the frictional resistance generated between them can be suppressed. Therefore, the cable protection tube 10 of the present embodiment can improve the workability of inserting the separator 5. Furthermore, in this cable protection tube 10, since the insertion resistance reducing means of the present invention is configured with a simple one such as the protrusion 522, the manufacturing cost can be reduced.

Third embodiment:
FIG. 4 is a vertical cross-sectional view of an intermediate portion on the left side of the cable protection tube 20 showing the third embodiment of the present invention. In the present embodiment, the portions on the outer surface 62a side of the leg portions 62, 62 of the separator 6 are constituted by the low friction resistance layer 623 which is the insertion resistance reducing means of the present invention. The low frictional resistance layer 623 is made of a synthetic resin material having a lower frictional resistance against the inner surface 2a of the tube member 2 than a general synthetic resin material used in other parts of the separator 6. Examples of the synthetic resin material used for the low frictional resistance layer 623 include Teflon (registered trademark) and nylon (registered trademark).

  In the cable protection tube 20 configured as described above, when the operator inserts the separator 6 into the interior S of the tube member 2, the separator 6 is formed by the low frictional resistance layer 623 provided on the legs 62 and 62. Since the contact area between the pipe member 2 and the inner surface 2a of the pipe member 2 is smaller than in the prior art, the frictional resistance generated between the two is suppressed. Therefore, the cable protection tube 20 of the present embodiment can improve the workability of inserting the separator 6. In addition, since the cable protection tube 20 is configured by the insertion resistance reducing means of the present invention as a simple material such as the low frictional resistance layer 623, the manufacturing cost can be reduced.

  Further, as another method for forming the low friction resistance layer described in the present embodiment, there is a method using a synthetic resin tape (Teflon tape, nylon tape, etc.) having low friction resistance. In this method, the synthetic resin tape is affixed to the entire outer side surface of the leg part that has been molded in advance or to the longitudinal direction of the outer side surface (the axial direction of the tube member 2).

Fourth embodiment:
FIG. 5 is a vertical cross-sectional view of an intermediate portion on the left side of the cable protection tube 30 showing the fourth embodiment of the present invention. The tube member 7 of the present embodiment has the same shape as the tube member 2 described in the first to third embodiments, but the portion on the inner surface 7a side reduces the insertion resistance of the present invention. It is comprised by the low frictional resistance layer 723 which is a means. The low frictional resistance layer 723 is a synthetic resin having a lower frictional resistance against the outer surfaces 132a and 132a of the legs 132 and 132 of the separator 103 than a general synthetic resin material used in other parts of the pipe member 7. It is made of material. The synthetic resin material used for the low friction resistance layer 723 is the same as the synthetic resin material used for the low friction resistance layer 623 described in the third embodiment.

  In the cable protection tube 30 configured as described above, when the operator inserts the separator 103 into the interior S of the tube member 7, the low frictional resistance layer 723 provided on the inner surface 7a side of the tube member 7 Since the contact area between the leg portions 132, 132 of the separator 103 and the inner surface 7a of the pipe member 7 is smaller than the conventional one, the frictional resistance generated between the two is suppressed. Therefore, the cable protection tube 30 of the present embodiment can improve the workability of inserting the separator 3. In addition, since the cable protection tube 30 is configured by the insertion resistance reducing means of the present invention as a simple material such as the low frictional resistance layer 723, the manufacturing cost can be reduced.

  As another method for forming the low friction resistance layer described in the present embodiment, there is a method using a synthetic resin tape having a low friction resistance as described in the third embodiment. In this method, the synthetic resin tape is affixed to the contact surface with the legs 32 and 32 of the separator 103 on the entire inner surface of the tube member formed in advance or on the inner surface of the tube member.

Fifth embodiment:
FIG. 6 is a longitudinal sectional view of a separator 8 showing a fifth embodiment of the present invention. The separator main body 81 of the separator 8 is provided with a bending means 82 which is an insertion resistance reducing means of the present invention at an intermediate portion 811a of the flat surface portion 811. As shown in FIG. 7, the bending means 82 is formed by cutting out the lower side of the intermediate portion 811 a and includes a concave portion 821 and a convex portion 822.

  The recess 821 is formed on the left side of the intermediate portion 811a, and the cross-sectional shape is an arrow shape facing left. A pair of protrusions 821a and 821a are formed on the opening side of the recess 821 so as to face each other in the vertical direction.

  The convex portion 822 is formed on the right side of the intermediate portion 811a, and the cross-sectional shape is an arrow shape facing left. The front end portion 822a of the convex portion 822 is locked to the projecting portions 821a and 821a of the concave portion 821, whereby the concave portion 821 and the convex portion 822 are engaged in the left-right direction inside the intermediate portion 811a.

  In the separator 8 configured as described above, a bending operation of the separator 8 will be described. This bending work is performed before the separator 8 is inserted. The operator holds the inclined portions 312 and 312 of the separator main body 81 with both hands in the separator 8 of FIG. 6, and bends the intermediate portion 811a of the flat surface portion 811 upward as shown in FIG. Then, as shown in FIG. 9, the convex part 822 of the bending means 82 comes off from the concave part 821, and the separator 8 remains bent.

  Next, as shown in FIG. 10, the operator installs the plurality of sheath tubes 4 in the interior S of the tube member 2, and then inserts the separator 8 into the interior S of the tube member 2. At this time, since the separator 8 is bent, no frictional resistance is generated between the legs 132 and 132 of the separator 8 and the inner surface 2a of the pipe member 2. Therefore, the cable protection tube 40 of the present embodiment can reliably improve the insertion workability of the separator 8 as compared with the cable protection tube described in the first to fourth embodiments. .

  In this way, after the separator 8 is arranged in the interior S of the pipe member 2, the operator performs a restoration operation of the separator 8. Specifically, two workers lift the sheath tube 4 accommodated in the lower portion of the interior S of the tube member 2, and place the sheath tube 4 below the intermediate portion 811 a of the separator body 81. The sheath tube 4 is lifted and the intermediate portion 811a is pushed up. Then, the convex portion 822 is fitted into the concave portion 821 as shown in FIG. As a result, as shown in FIG. 11, the separator main body 81 is returned to its original shape, and the inner bent portions 321 and 321 are fitted into the protrusions 21 and 21 of the tube member 2, whereby the legs 132 and 132 are connected to the tube. The left and right portions of the inner surface 2a of the member 2 are pressed.

  As described above, in the cable protection tube 40 of the present embodiment, even if the separator 8 is arranged in the folded state inside the tube member 2, the separator 8 can be easily restored if the operator pushes up the intermediate portion 811a. Can be made. In addition, since the operator only has to push up the intermediate portion 811a, the inner surface 2a of the pipe member 2 is not disturbed at that time. Therefore, the cable protection tube 40 of the present embodiment can improve the restoration workability after the separator 8 is inserted.

Sixth embodiment:
FIG. 12 is a longitudinal sectional view of a separator 9 showing a sixth embodiment of the present invention. The separator body 91 of the separator 9 has a flat surface portion 911 that is thicker than the inclined portions 312 and 312, and a bending means 92 that is an insertion resistance reducing means of the present invention is provided in the intermediate portion 911 a. . As shown in FIG. 13, the bending means 92 is formed by cutting out the lower side of the intermediate portion 911 a and includes a concave portion 921 and a convex portion 922.

  The recess 921 is formed on the left side of the intermediate portion 911a, and the cross-sectional shape is a substantially square shape. A protruding portion 921a is formed on the lower portion of the recess 921 on the opening side.

  The convex portion 922 is formed on the right side of the intermediate portion 911a, and the cross-sectional shape is an arrow shape facing left. The tip end portion 922a of the convex portion 922 is locked to the projecting portion 921a of the concave portion 921, so that the concave portion 921 and the convex portion 922 are engaged in the left-right direction inside the intermediate portion 911a.

  In the separator 9 configured as described above, a bending operation of the separator 9 will be described. This bending operation is performed before the insertion operation of the separator 9 as in the fifth embodiment. In the separator 9 of FIG. 12, the worker holds the inclined portions 312 and 312 of the separator main body 91 with both hands, and bends the intermediate portion 911a upward as shown in FIG. Then, as shown in FIG. 15, the convex part 922 of the bending means 92 comes off from the concave part 921, and the separator 9 remains bent.

  Next, the operator performs the insertion operation of the separator 9 after performing the installation operation of the sheath tube similarly to the fifth embodiment. At this time, since the separator 9 is bent, no frictional resistance is generated between the legs 132 and 132 of the separator 9 and the inner surface 2a of the pipe member 2. Therefore, the cable protection tube 50 according to the present embodiment can improve the insertion workability of the separator 9 with certainty in the same manner as the cable protection tube 40 according to the fifth embodiment.

  Next, the operator performs the restoration work of the separator 9. As shown in FIG. 16, this work is performed by two workers lifting up the sheath tube 4 accommodated in the lower portion of the inside S of the pipe member 2, as in the fifth embodiment. The intermediate portion 911a of the separator body 91 is pushed up. Then, the convex portion 922 is fitted into the concave portion 921 as shown in FIG. As a result, as shown in FIG. 17, the separator main body 91 is returned to its original shape, and the inner bent portions 321 and 321 are fitted into the protrusions 21 and 21 of the tube member 2, whereby the legs 132 and 132 are connected to the tube. The left and right portions of the inner surface 2a of the member 2 are pressed.

  Thus, also in the cable protection tube 50 of the present embodiment, as in the case of the cable protection tube 40 of the fifth embodiment, if the operator pushes up the intermediate portion 911a, the separator 9 can be easily restored. In this case, the inner surface 2a of the pipe member 2 is not obstructed. Therefore, the cable protection tube 50 of the present embodiment can improve the restoration workability after the separator 9 is inserted.

  Note that the folding means described in the present embodiment and the fifth embodiment may be provided in a portion other than the intermediate portion of the separator main body, and even in that case, the separator is compared with the case where these bending means are not used. Restoration workability after insertion can be improved.

  Further, in both embodiments, the sheath tube 4 is used for the restoration work of the separator. However, the worker himself may use another member or no member. When the sheath tube 4 is fully accommodated in the accommodation space Sa on the lower side of the tube member 2, the separator is supported by these sheath tubes 4, so that the separator is prevented from being broken. Therefore, in this case, the engaging force of the bending means may be weakened.

Seventh embodiment:
FIG. 18 is a longitudinal sectional view of an intermediate portion on the left side of the cable protection tube 60 showing the seventh embodiment of the present invention. In the present embodiment, on the outer side surfaces 232a and 232a of the leg portions 232 and 232 of the separator 203, protrusions 233 and 233 which are insertion resistance reducing means of the present invention are formed on the lower end portions 231a and 231a of the inner bent portions 231 and 231. Is formed. The projection 233 extends the lower end portion 231a of the inner bent portion 231 outward from the upper end portion 231b so as to extend in parallel with the axial direction of the tube member 2, and further lowers the lower portion 234 of the lower end portion 231a on the inner side. It is formed by being bent to extend downward.

  In the cable protection tube 60 configured as described above, when the operator inserts the separator 203 into the inside S of the tube member 2, the legs 232 are formed by the protrusions 233 and 233 provided on the legs 232 and 232. , 232 and the inner surface 2a of the pipe member 2 are smaller than the conventional contact area, so that the frictional resistance generated between them can be suppressed. Therefore, the cable protection tube 60 of the present embodiment can improve the workability of inserting the separator 203. In addition, since the cable protection tube 203 is configured by the insertion resistance reducing means of the present invention as simple as the protrusion 233, the manufacturing cost can be reduced.

Eighth embodiment:
FIG. 19 is a vertical cross-sectional view of an intermediate portion on the right side of the cable protection tube 70 showing the eighth embodiment of the present invention. In the present embodiment, in the separator 303, inner protrusions 333 and 333 are formed at lower portions of the inner bent portions 321 and 321 of the leg portions 332 and 332. The inner protrusion 333 is formed by bending an intermediate portion of the lower portion of the inner bent portion 321 inward so as to extend in parallel with the axial direction of the tube member 2 and has a semicircular cross-sectional shape. . The cross-sectional shape is not particularly limited, such as a substantially U-shape. Further, grooves 334 and 334, which are insertion resistance reducing means of the present invention, are formed on the opposite side (outer side 332a side) of both the inner projections 333 and 333.

  In the cable protection tube 70 configured as described above, when an operator inserts the separator 303 into the interior S of the tube member 2, the legs 332 are formed by the grooves 334 and 334 provided in the legs 332 and 332. , 332 and the inner surface 2a of the pipe member 2 are smaller than in the prior art, so that the frictional resistance generated between them can be suppressed. Therefore, the cable protection tube 70 of the present embodiment can improve the workability of inserting the separator 203. In addition, since the cable protection tube 70 is configured with the insertion resistance reducing means of the present invention as simple as the groove 334, the manufacturing cost can be reduced.

  Further, as shown in FIG. 19, in the state where the plurality of sheath tubes 4 are housed in the cable housing space Sa on the lower side of the cable protection tube 70, the cable protection tube 70 is subjected to external vibration or impact. When added, for example, the sheath tube 4 in the vicinity of the right leg 332 may jump up (see arrow E). At this time, the inner protrusion 333 formed on the right leg 332 is brought into contact with the sheath tube 4 together with the inclined portion 312 of the separator main body 31 to use the jumping force, whereby the right leg 332 is obtained. The leg portion 332 further presses the inner surface 2a of the pipe member 2 (see arrow F).

  Therefore, even if the sheath tube 4 springs up, the inner bent portion 321 on the right side of the separator 303 does not come off from the protrusion 21 on the right side of the tube member 2. Therefore, the cable protection tube 70 of the present embodiment can prevent the separator 303 from coming off the tube member 2 even when the sheath tube 4 jumps up.

  Further, in the cable protection tube 70 of the present embodiment, the groove 334 that is the insertion resistance reducing means of the present invention is formed on the opposite side of the inner protrusion 333. Therefore, when manufacturing the separator 303, the inner protrusion 333 and the groove 334 do not need to be separately formed on the leg 332, so that the appearance of the leg 332 can be prevented from being deteriorated. Therefore, the cable protection tube 70 of the present embodiment can enhance the function of preventing the separation of the separator 303 and improve the appearance quality of the separator 303.

  As mentioned above, although embodiment concerning this invention was illustrated, these embodiments do not limit the content of this invention. Moreover, various changes and the like are possible within a range not departing from the gist of the present invention. For example, the separator 6 having the low friction resistance layer 623 as described in the third embodiment and the pipe member 7 having the low friction resistance layer 723 as described in the fourth embodiment are used as the fifth member. The present invention may be applied to the cable protection tube described in the embodiments other than the embodiment and the sixth embodiment. In this case, since the frictional resistance between the leg part of the separator and the inner surface of the pipe member is further suppressed, the workability of inserting the separator can be further improved.

  As described above, in the cable protection tube of the present invention, the separator workability can be improved. Therefore, the present invention can be fully utilized in the technical field of cable protection tubes.

It is a longitudinal cross-sectional view of the cable protective tube which shows 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the middle part of the left side of the cable protection tube of FIG. It is a longitudinal cross-sectional view of the intermediate part of the left side of the cable protection tube which shows the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the intermediate part of the left side of the cable protection tube which shows the 3rd Embodiment of this invention. It is a longitudinal cross-sectional view of the intermediate part of the left side of the cable protection tube which shows 4th Embodiment of this invention. It is a longitudinal cross-sectional view of the separator which shows the 5th Embodiment of this invention. It is an enlarged view of the A section of FIG. It is a longitudinal cross-sectional view in the state where the separator was bent in the embodiment. It is an enlarged view of the B section of FIG. It is a longitudinal cross-sectional view which shows the decompression | restoration operation | work of a separator in the embodiment. It is a longitudinal cross-sectional view which shows the state which the decompression | restoration of the separator was completed in the embodiment. It is a longitudinal cross-sectional view of the separator which shows the 6th Embodiment of this invention. It is an enlarged view of the C section of FIG. It is a longitudinal cross-sectional view in the state where the separator was bent in the embodiment. It is an enlarged view of the D section of FIG. It is a longitudinal cross-sectional view which shows the decompression | restoration operation | work of a separator in the embodiment. It is a longitudinal cross-sectional view which shows the state which the decompression | restoration of the separator was completed in the embodiment. It is a longitudinal cross-sectional view of the intermediate part of the left side of the cable protection tube which shows the 7th Embodiment of this invention. It is a longitudinal cross-sectional view of the middle part of the right side of the cable protection tube which shows 8th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cable protection tube 2 Tube member 2a Inner surface of a tube member 3 Separator 4 Sheath tube 5 Separator 6 Separator 7 Tube member 7a Inner surface of a tube member 8 Separator 9 Separator 10 Cable protection tube 20 Cable protection tube 21 Protrusion 30 Cable protection tube 31 Separator body 32 Leg part 32a Outer side surface of leg part 40 Cable protection pipe 50 Cable protection pipe 52 Leg part 52a Outer side face of leg part 60 Cable protection pipe 62 Leg part 62a Outer side face of leg part 70 Cable protection pipe 81 Separator body 82 Bending means 91 Separator body 92 Bending means 132 Leg portion 132a Outer side surface 203 Separator 231 Inner bent portion 232 Leg portion 232a Outer surface of leg portion 233 Protrusion 303 Separator 321 Inner bent portion 322 Groove 332 Leg portion 333 Inner protrusion 334 Groove 522 Protrusion 6 23 Low Friction Resistance Layer 723 Low Friction Resistance Layer 811a Separator Intermediate Part 821 Concave part 822 Convex part 911a Separator Intermediate Part 921 Concave part 922 Convex part C Communication cable C1 Trunk cable C2 Pull-in cable S Pipe member internal Sa Cable housing Space Sb Cable storage space

Claims (4)

A pipe member, and a plate-like separator that is inserted and installed inside the pipe member. The separator is formed at the left and right ends of the separator body extending left and right inside the pipe member. And the pair of pressing portions press the left and right side portions of the inner surface of the tube member and are supported by the inner surface, whereby the separator body moves up and down the interior of the tube member. In the cable protective tube in which the two cable housing spaces are formed and the cables are housed in each of the two cable housing spaces,
The provided insertion resistance reducing means in separators, the insertion resistance reducing means, upon insertion of the separator, prior SL in the state folded to allow restoring the separator body to its original shape the said pair of pressing portions A cable protection tube configured so that frictional resistance does not occur between the inner surface of the tube member. The predetermined portion of the separator body is provided with a bending means constituting the insertion resistance reducing means, and the bending means is cut at one of the upper and lower sides of the predetermined portion so as to engage in the left-right direction inside the predetermined portion. It is provided with a concave portion and a convex portion that are formed to be missing,
When the separator is inserted, the predetermined portion is bent up and down to the other side so that frictional resistance does not occur between the pair of pressing portions and the inner surface of the tube member, and the convex portion is removed from the concave portion. The separator is configured to be folded,
In this state, with respect to the separator disposed inside the tube member, the predetermined portion is pushed from one side of the upper and lower sides to the other side, and the convex portion is fitted into the concave portion. 2. The cable protection tube according to claim 1, wherein the cable protection tube is configured to return to a shape and the pair of pressing portions press the left and right side portions of the inner surface of the tube member . The folding means is provided at an intermediate portion of the separator body, and is configured to return the original shape from this state while the separator is bent at the intermediate portion. Item 3. The cable protective tube according to Item 2 . A pair of protrusions for determining the insertion position of the separator are formed on the left and right side portions of the inner surface of the tube member, and the pair of pressing portions are formed to extend downward from the left and right ends of the separator body. On the other hand, each pressing portion has an inner bent portion formed by bending a predetermined portion inward so as to be fitted to a corresponding protrusion of the tube member, and a predetermined portion below the inner bent portion is connected to the tube member. An inner protrusion formed to protrude inward so as to extend parallel to the axial direction of
When the sheath pipe accommodated in the vicinity of the inner projection in the cable housing space on the lower side of the pipe member springs up, the inner projection comes into contact with the sheath pipe together with the separator main body and jumps up. The configuration is such that, by using force, a space between the pressing portion having the inner protrusion and the separator main body is widened, and the pressing portion further presses the inner surface of the pipe member. The cable protection tube according to any one of claims 1 to 3 .

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