Protective equipment and method for lifting branch cable using the same

Abstract

To improve workability by suppressing expansion of a diameter of a protective equipment while maintaining performance for protecting a mold part from an impact when a branch cable is hung up through a hole provided on a floor of a building.SOLUTION: A protective equipment 1 of a branch cable 10 includes: a flexible sheet part 5 having an upper edge part 2, a lower edge part 3 connected to both ends of the upper edge part 2, and a body part 4 surrounded by the upper edge part 2 and the lower edge part 3; and a winding part 6 provided along the upper edge part 2 and having mutually overlapped parts fixed by pressing. The sheet part 5 has a tubular shape in a state where the winding part 6 is wound around and fixed to a trunk line 11 so that the body part 4 covers a mold portion 17, the upper edge part 2 forms a first opening 7, and the lower edge part 3 forms a second opening 8. The second opening 8 has a first partial part 8a from which a branch line 13 is drawn out and a second partial part 8b from which the trunk line 11 is drawn out, and the first partial part 8a is configured to be located closer to the upper edge part 2 than the second partial part 8b.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a protective device and a method for lifting a branch cable using the protective device.

Background Art

[0002] A branch cable is a cable having a main line and a branch line branched from the main line. In a branch cable, the connection portion between the main line and the branch line is hardened by a mold portion made of resin.

[0003] Conventionally, when installing a branch cable in a building such as a building, a cap is attached to the cable head which is the upper terminal of the main line, and the cable head is attached to a lifting jig. Then, by lifting the lifting jig, the branch cable is lifted. Instead of attaching a cap, the branch cable may be lifted with a lifting jig by winding vinyl tape around the cable head.

[0004] In the above work, when the branch cable is automatically lifted by a winch or the like, there is a risk that the mold portion may be caught on the edge of a hole or the like formed in the floor surface of the building during the lifting.

[0005] To solve such a problem, Patent Document 1 discloses a protective device for a mold which is formed in a cylindrical shape, the diameter of a first opening is smaller than the diameter of a second opening, and the diameter of the first opening is configured to be adjustable.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] The protective device of Patent Document 1 has a diameter that greatly expands from the first opening to the second opening. By providing a plurality of slits in the circumferential direction of the second opening, the expansion is suppressed. However, when a part of the mold part is exposed from the slit, there is a concern about a decrease in the protective performance.

[0008] The present invention provides a protective device capable of suppressing the expansion of the diameter of the protective device while maintaining the performance of protecting the mold part from impact, and a method for lifting a branch cable using the protective device.

Means for Solving the Problems

[0009] In order to achieve the above-described object, the protective device according to the present invention is characterized as follows. A protective device for protecting the mold part of a branch cable including a main line, a branch line branched from the main line, a connection part between the main line and the branch line, and a mold part covering the connection part, A flexible sheet part having an upper edge part, a lower edge part connected to both ends of the upper edge part, and a main body part surrounded by the upper edge part and the lower edge part, It is provided along the upper edge part and includes a winding part in which overlapping parts are fixed by pressing, The sheet part forms a cylindrical shape in a state where the winding part is wound around the main line so that the main body part covers the mold part, the upper edge part forms a first opening, and the lower edge part forms a second opening, The second opening has a first part from which the branch line is drawn out and a second part from which the main line is drawn out, and the first part is configured to be closer to the upper edge part than the second part. Protective device.

[0010] Also, in order to achieve the above-described object, a method for lifting a branch cable using the protective device according to the present invention is characterized as follows. A lifting method for lifting a branch cable using a protective device, Winding the above protective device around the mold part of the branch cable, While lifting the end of the branch cable, pass the branch cable and the protective device through the hole in the building. Lifting method.

Advantages of the Invention

[0011] According to the present invention, it is possible to suppress the expansion of the diameter of the protective device while maintaining the performance of protecting the mold part from impact.

[0012] As described above, the present invention has been briefly described. Further, the details of the present invention will be further clarified by reading through the embodiments for carrying out the invention described below (hereinafter referred to as "embodiments") with reference to the attached drawings.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0014] Specific embodiments of the present invention will be described below with reference to the respective drawings.

[0015] FIG. 1 is a perspective view of a branch cable 10. The branch cable 10 is a cable installed in a building such as a building, and includes a main cable 11 and a branch line (branch cable) 13 that branches and extends from a predetermined portion in the longitudinal direction of the main cable 11. The current flowing through the main cable 11 branches from the branch line 13 and is distributed to each part of the building.

[0016] FIG. 2 is a view showing the inside of the mold portion 17 of the branch cable 10. FIG. 2(A) is a side view, and FIG. 2(B) is a rear view. In FIG. 2(A), a part of the mold portion 17 is removed to show the inside of the mold portion 17. A connection portion 15 exists inside the mold portion 17. The connection portion 15 binds and fixes the main cable 11 and the branch line 13 at the branch portion where the branch line 13 branches from the main cable 11. Although the main cable 11 and the branch line 13 are separate lines from each other, the connection portion 15 made of a conductive material (such as metal) fixes the main cable 11 and the branch line 13 in a conductive state at the branch portion, enabling the current to conduct from the main cable 11 to the branch line 13 through the connection portion 15.

[0017] The mold portion 17 is formed of, for example, resin and is formed to cover the connection portion 15. The mold portion 17 mechanically protects the connection portion 15 and ensures insulation between the connection portion 15 and the surroundings.

[0018] In FIG. 1, three main lines 11 are bundled, but the number of main lines 11 to be bundled is not particularly limited. Also, in FIGS. 1 and 2, one branch line 13 branches from one main line 11, but two or more branch lines 13 may branch from one main line 11. In addition, in order to prevent the diameter from becoming thick due to the overlapping of the mold parts 17 of each main line 11, the positions of the mold parts 17 of each main line 11 are shifted up and down. Further, since a predetermined lifting jig such as a winch holds the branch cable 10, a cap 18 is provided at the end of the branch cable 10.

[0019] Next, the protector 1 according to the embodiment will be described. FIG. 3 is a view showing the protector 1 according to the embodiment. (A) of FIG. 3 is a view of the protector 1 in a state before being wound around the mold part 17, (B) of FIG. 3 is a view of the protector 1 when being wound around the mold part 17, and (C) of FIG. 3 is a perspective view of the protector 1 in the state of (B) of FIG. 3. As will be described later, the protector 1 is a member that protects the mold part 17 by being wound around the mold part 17 and accommodating the mold part 17 inside.

[0020] As shown in FIG. 3(A), the protector 1 includes a flexible sheet part 5 and a winding part 6. The sheet part 5 has an upper edge part 2, a lower edge part 3 connected to both ends of the upper edge part 2, and a main body part 4 surrounded by the upper edge part 2 and the lower edge part 3. The main body part 4 is a protection part that protects the mold part 17. The material constituting the sheet part 5 is not particularly limited, but a material with a small friction coefficient, for example, a fluororesin such as Teflon (registered trademark), or a flexible material obtained by coating such a material with a small friction coefficient on a base material is used. Thereby, the protector 1 has flexibility that can be wound around the branch cable 10.

[0021] The winding part 6 is provided along the straight upper edge part 2 of the sheet part 5, and as shown in FIGS. 3(B) and 3(C), the parts that are overlapped with each other during winding are configured to be fixable by pressing. Specifically, the winding part 6 has a detachable fixing member. The detachable fixing member is a fixing member that can easily fix and release the fixed state of the parts overlapped with each other, such as a hook-and-loop fastener, that is, a fixing member that can be easily attached to and detached from the branch cable 10 which is the object to be attached. The winding part 6 of the present embodiment has a strip-shaped fixing member provided along the upper edge part 2 of the sheet part 5. Since the sheet part 5 is flexible, it can be bent. As shown in FIGS. 3(B) and 3(C), by bending it in a rounding manner, the fixing member (such as a hook-and-loop fastener) of the winding part 6 is fixed, and thus the parts overlapped with each other are fixed.

[0022] By winding the winding part 6 around the branch cable 10 and pressing it at a desired position, the protective device 1 can be easily attached to the branch cable 10. Also, by peeling off the parts of the winding part 6 that are overlapped with each other, the protective device 1 can be easily removed from the branch cable 10. Therefore, since the protective device 1 has the winding part 6, the workability in attaching and detaching the protective device 1 can be improved.

[0023] The winding part 6 may be an adhesive tape or the like. However, if the winding part 6 is a member that can be repeatedly attached and detached, the protective device 1 can be repeatedly reused, and the cost can be reduced.

[0024] As shown in FIG. 3(C), the sheet part 5 forms a cylindrical shape in the state of being wound and fixed. When the sheet part 5 has a cylindrical shape, the upper edge part 2 forms the first opening 7, and the lower edge part 3 forms the second opening 8. The second opening 8 has a narrow shape that is obliquely opened with respect to the axial direction (vertical direction in the figure) of the protective device 1.

[0025] Figure 4 is a perspective view of the branch cable 10 with the protective device 1 attached. The user wraps the winding part 6 while applying the protective device 1 shown in Fig. 3(A) onto the upper part of the mold part 17 of the branch cable 10, bringing the protective device 1 into the states shown in Fig. 3(B) and Fig. 3(C), and fixing the winding part 6. Thereby, the protective device 1 is attached to the branch cable 10, and the sheet part 5 can cover the mold part 17. In Figs. 4 and 5, for easy understanding, the inside of the wrapped protective device 1 is illustrated.

[0026] The sheet part 5 of the protective device 1 forms a cylindrical shape in a state where the winding part 6 is wound around and fixed to the main cable 11 so that the main body part 4 covers the mold part 17. As described above, the upper edge part 2 forms the first opening 7, and the lower edge part 3 forms the second opening 8.

[0027] In a state where the protective device 1 is attached to the branch cable 10, the second opening 8 has a first part 8a from which the branch line 13 is drawn out and a second part 8b from which the main cable 11 is drawn out. The first part 8a is configured to be closer to the upper edge part 2 than the second part 8b.

[0028] Figure 5 is a view showing a situation where the branch cable 10 in Fig. 4 is lifted so as to pass through the hole 21 provided in the floor 20 of the building. A predetermined lifting jig such as a winch holds the cap 18 provided at the end of the branch cable 10 and lifts the branch cable 10 in a predetermined arrow direction. Thereby, the branch cable 10 and the protective device 1 are passed through the hole 21.

[0029] According to the protective device 1 according to the embodiment, it is possible to prevent a direct impact from being applied to the mold part 17, and it is possible to prevent a situation where the mold part 17 gets caught on the hole 21 or the like during lifting and is damaged. Since it is possible to prevent getting caught, it is also possible to prevent an accident such as a load being applied to the lifting jig due to the caught impact and the branch cable 10 coming out of the lifting jig and falling.

[0030] Also, with the protective device 1 wrapped around the branch cable 10, the sheet portion 5 covers the mold portion 17, and the lead-out position of the branch line 13 is above the lead-out position of the main line 11. That is, the sheet portion 5 formed in a tubular shape has a narrow shape in which the second opening 8 is obliquely opened so as to include the first portion 8a and the second portion 8b. Although the second opening 8 has a narrow shape, the branch line 13 and the main line 11 can be drawn out from the first portion 8a and the second portion 8b respectively. Therefore, without making a cut as in the conventional protective device, the branch line 13 and the main line 11 can be drawn out while suppressing the spread downward. According to this protective device 1, during the construction of lifting the branch cable 10 through the hole 21 provided in the floor 20 of the building, while maintaining the performance of protecting the mold portion 17 from impact, the spread of the diameter of the protective device 1 can be suppressed and the workability can be improved.

[0031] Further, by forming the surface of the protective device 1 with a material having a small coefficient of friction, it is possible to make it low friction while protecting the mold portion 17, so that it is possible to more reliably prevent it from being caught on the hole 21.

[0032] In the embodiment, the lower edge portion 3 has a parabolic shape. Thereby, in a state where the winding portion 6 is wound around the main line 11 and fixed, the second opening 8 has an elongated shape, and the first portion 8a and the second portion 8b can be easily formed.

[0033] FIG. 6 is a view showing a modified example 1 of the protective device 1. In the protective device 1 of this example, a guide 31 is provided on the winding portion 6. The guide 31 indicates, for example, the overlapping position of the winding portion 6 according to the thickness of the branch cable 10. By using the guide 31, the user can wind the protective device 1 around the branch cable 10 with an appropriate strength according to the thickness of the branch cable 10.

[0034] FIG. 7 is a diagram showing a second modification example of the protective device 1. In the protective device 1 of this example, a fastener 32 is provided at the lower edge portion 3 of the sheet portion 5. The fastener 32 is configured to be able to hold the overlap of the sheet portions 5, for example, by fitting convex portions and concave portions provided at locations where the sheet portions 5 overlap each other. The user can adjust the spreading state of the sheet portion 5 using the fastener 32.

[0035] FIG. 8 is a diagram showing a third modification example of the protective device 1. In the protective device 1 of this example, the sheet portion 5 is triangular. That is, the lower edge portion 3 of the sheet portion 5 is linear instead of parabolic. Also, the lower edge portion 3 of the sheet portion 5 may have a shape in which the width, that is, the length in the left - right direction in the figure, is narrower than the upper edge portion 2. With such a shape, it is possible to prevent the downward spread of the sheet portion 5.

[0036] FIG. 9 is a diagram showing a fourth modification example of the protective device 1. In the protective device 1 of this example, a perforation 33 is provided. When the diameter of the main cable 11 around which the protective device 1 is wound is small, there may be a problem that the protective device 1 is wound multiple times and the lower second opening 8 becomes small. By providing the perforation 33 in the protective device 1 and cutting and using it along the perforation 33, it is possible to cope with the winding problem due to the thickness of the main cable 11.

[0037] Here, the features of the protective device according to the above - described embodiment of the present invention and the method for lifting a branch cable using the protective device are briefly summarized and listed in [1] to [4] below, respectively.

[0038] [1] A protective device (1) for protecting a mold portion of a branch cable (10) including a main cable (11), a branch line (13) branched from the main cable, a connection portion (15) between the main cable and the branch line, and a mold portion (17) covering the connection portion, a flexible sheet portion (5) having an upper edge portion (2), a lower edge portion (3) connected to both ends of the upper edge portion, and a main body portion (4) surrounded by the upper edge portion and the lower edge portion, and a winding portion (6) provided along the upper edge portion, wherein overlapping portions are fixed by pressing. The sheet part forms a cylindrical shape in a state where the winding part is wound around and fixed to the main line so that the main body part covers the mold part. The upper edge part forms a first opening (7), and the lower edge part forms a second opening (8). The second opening has a first part (8a) from which the branch line is drawn out and a second part (8b) from which the main line is drawn out. The first part is configured to be closer to the upper edge part than the second part. Protective device.

[0039] According to the protective device of [1] above, in a state where the protective device is wound around a branch cable, the sheet part covers the mold part, and the lead-out position of the branch line is above the lead-out position of the main line. That is, the cylindrical sheet part suppresses the spread downward without making a cut. Therefore, according to this protective device, during the construction of lifting the branch cable through a hole provided in the floor of the building, while maintaining the performance of protecting the mold part from impact, the spread of the diameter of the protective device can be suppressed and the workability can be improved.

[0040] [2] The winding part has a detachable fixing member. The protective device according to [1] above.

[0041] According to the protective device of [2] above, it is easy to attach and detach the protective device to and from the branch cable, and the workability can be improved.

[0042] [3] The lower edge part has a parabolic shape. The protective device according to [1] or [2] above.

[0043] According to the protective device of [3] above, in a state where the winding part is wound around and fixed to the main line, the second opening has an elongated shape, and the first part and the second part can be easily formed.

[0044] [4] A lifting method for lifting a branch cable using the protective device according to any one of [1] to [3], Wrap the protective device around the mold part of the branch cable. While pulling up the end of the branch cable, pass the branch cable and the protective device through the hole (21) in the building. Lifting method.

[0045] According to the lifting method of [4] above, when lifting the branch cable through the hole provided in the floor of the building, the mold part is protected from impact, and the spread of the diameter of the protective device is suppressed, so the workability can be improved.

Explanation of symbols

[0046] 1 Protective device 2 Upper edge part 3 Lower edge part 4 Main body part 5 Sheet part 6 Wrapping part 7 First opening 8 Second opening 8a First part 8b Second part 10 Branch cable 11 Trunk line 13 Branch line 15 Connection part 17 Mold part 18 Cap 20 Floor 21 Hole

Claims

1. A protector for protecting the mold part of a branch cable, the branch cable comprising a main line, a branch line branched from the main line, a connection part between the main line and the branch line, and a mold part covering the connection part, the protector comprising: A flexible sheet part having an upper edge part, lower edge parts connected to both ends of the upper edge part, and a main body part surrounded by the upper edge part and the lower edge parts; A winding part provided along the upper edge part, the overlapping parts of which are fixed by pressing; The sheet part forms a cylindrical shape in a state where the winding part is wound around and fixed to the main line such that the main body part covers the mold part, the upper edge part forms a first opening, and the lower edge part forms a second opening; The second opening has a first part from which the branch line is drawn out and a second part from which the main line is drawn out, and the first part is configured to be closer to the upper edge part than the second part; Protector.

2. The winding part has a detachable fixing member. The protector according to Claim 1.

3. The lower edge part has a parabolic shape. The protector according to Claim 1.

4. A lifting method for lifting a branch cable using the protector according to any one of Claims 1 to 3, the method comprising: Winding the protector around the mold part of the branch cable; Passing the branch cable and the protector through a hole in a building while pulling up an end of the branch cable; Lifting method.

Images