JP2540134Y2 - Closure Scale - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a standard closure for use in a connection point of an underground communication cable.
In order to maintain the airtightness between the cable insertion holes at both ends of the jar and the cable, a closure scale for confirming the number of windings of the tape for sealing wound around the cable and the length of the tape cut. It is about a file.

[0002]

2. Description of the Related Art FIG. 3 shows a closure (protective cover) 1 used at a connection point between underground communication cables or a connection point branched from one cable into a plurality of cables.
The connecting portion 3 of the cable 2 and the cable 2 are provided with end plates 5 at both ends.
The airtight tape 6 for sealing is interposed between the cable 2 and the end face plate 5 in order to prevent deterioration of the connection portion 3. Cable 2
Is fixed by a cable holding metal fitting 7 attached to the inside of the sleeve of the end face plate 5, and the outer circumference of the cable 2 and the end face plate 5 outside the holding metal fitting 7 of such a cable 2 are fixed. The tape 6 is wound around the inner surface of the cable insertion hole 8 to maintain the airtightness of the sleeve 4. When attaching the tape 6, the tape 6 is wound around the outer periphery of the cable 2 with the number of turns corresponding to the diameter of the cable insertion hole 8 of the end face plate 5.
The connecting portion 3 is accommodated in the half sleeve 4-1 and the outer circumference of the other half sleeve 4-2 is bound by a plurality of bands 9.

In such a closure 1, the number of turns of the tape 6 depends on the diameter of the cable insertion hole 8 of the end plate 5 and the cable.
Although it can be easily determined from the difference from the diameter of the cable 2, the cable diameter is not constant and various diameters of the cable 2 are used, and a plurality of end plates 5 are used depending on the application and the cable diameter. Therefore, it is time-consuming and troublesome to calculate the number of turns by measuring the cable diameter and the diameter of the cable insertion hole each time. Therefore, conventionally, the tape 6 is formed by using three types of closure scales A, B, and C as shown in FIG.
The number of turns of the tape is determined, and the tape cutting length (the outermost peripheral length of the wound tape) after the tape is wound around the cable is checked. Cutting and removing.

The closure scales A, B, and C are:
There are three types corresponding to the three types of end face plates 5 having different cable insertion holes 8, and the order is from small diameter cable insertion holes to large diameter cable insertion holes. Each closure scale comprises a long scale body 10 and a U-shaped base 11 having a reference point 12, and the scale body 10 has a corresponding cable insertion hole. 8 is provided with a winding number scale 13 indicating the number of windings until the circumference becomes equal to 8, a cutting length scale 14 capable of measuring the tape cutting length after winding, and a normal scale 15.

The winding number scale 13 is a scale divided at a pitch of (2πt), where t is the tape thickness, and the zero point 16 of the cutting length scale 14 is set to zero in the winding number. The cutting length scale 14 measures the length of the tape wound extra to the outermost peripheral length of the tape which is equal to the inner peripheral length of the cable insertion hole 8. When the coil is wound an extra turn, the scale is scaled so as to indicate the length of the tape that has been wound extra (the inner diameter of the cable insertion hole 8 is D
Then, the tape length wound by one extra turn is π (D
+ 2t), the increment of the circumference is 2πt, and (2t) /
(Scaled at a scale of (D + 2t)). That is, the minimum scale of the cutting length scale 14 is 1 cm. When the tape 6 is wound by, for example, 160 cm more, the position of the cutting length scale 14 at 160 cm is indicated. Needless to say, the scale of the cutting length scale 14 increases as the diameters of B and C and the cable insertion hole 8 increase.

At the time of measurement, one of the closure scales A, B, and C is selected according to the type of the end face plate 5 on which the cable 2 is mounted. −
The scale main body 10 is inserted into the gap between the U-shaped bases 11 and wound tightly around the cable 2, and the number of turns 13 indicated by the reference point 12 is read. -Wrap around Bull 2. As shown in FIG. 4 (a), the distance from the reference point 12 to the designated numeral indicates the circumference of the cable. If the tape 6 is wound by the number of turns of the designated numeral, the outermost peripheral length of the tape 6 is obtained. Is equal to the circumference of the inner diameter of the cable insertion hole 8. Next, the scale is again placed on the wound tape 6.
Then, the cutting length of the tape 6 is confirmed.
The distance between the reference point 12 and the zero point 16 indicates the extra length of the tape 6, and the length corresponding to the scale is cut off by measuring the length of the tape 6 from the end of the tape 6 using the normal scale 15. Again, the cut length of the tape was confirmed, and if it was within the allowable range 17 shown in black in FIG. 4, the outermost peripheral length of the tape 6 was almost equal to the inner peripheral length of the cable insertion hole 8. Pass equally.

[0007]

However, in the conventional closure scale, three types of A, B and C are provided as a set, and the cable is inserted into the end plates at both ends of the closure. Workability was poor because it was selected and used each time according to the type and size of the hole. In addition, some scales are not used depending on the type of the end face plate, which is uneconomical. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The purpose of the present invention is to enable a single scale to cope with various cable insertion holes of a closure, thereby improving workability. An object of the present invention is to provide a closure scale that can reduce costs.

[0008]

SUMMARY OF THE INVENTION The present invention provides a flexible and long scale for winding a tape for sealing between a cable insertion hole of a closure and a cable. Wrap the main body around the cable, check the number of turns of the tape to be wound on the cable by the tape winding scale, and after winding the tape, wind the tape by the tape cutting length scale. In the closure scale for checking the cutting length, a plurality of tape winding scales corresponding to the diameters of various cable insertion holes are provided on one surface of the long scale main body. The reference points are provided in parallel with each other, and a plurality of tape cutting length scales corresponding to the diameters of various cable insertion holes are provided on the other back surface so that the respective reference points match. .

[0009]

[Function] A long scale body is wound around a cable with its surface facing outside, and the number indicated by the reference point is read by referring to the tape winding number scale corresponding to the diameter of the cable insertion hole, and the table is read. -Check the number of turns of the loop. The tape is wound around the cable by the number of turns. After wrapping the tape, wrap the tape on the tape with the back of the long scale body facing outward, and look at the tape cutting length scale corresponding to the diameter of the cable insertion hole, and check the tape. Read the length representing the cutting length. It is confirmed whether the tape cutting length is within an allowable range by cutting the tape end based on the length. The number of windings and the cutting length of the tape can be easily confirmed with one type of closure scale regardless of the cable insertion hole.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Parts that are the same as or correspond to those in the related art are given the same reference numerals. As shown in FIG. 1, the closure scale of the present invention is made of synthetic resin, as in the prior art.
It is formed of a thin plate made of metal such as aluminum, and is composed of a long scale main body 10 and a U-shaped base 11 integrated therewith. The scale body 10 has the same length as the conventional C-type scale, and has a width about 1.5 times that of the conventional scale.
On the surface of such a scale body 10, three types of winding number scales 13A, 13B and 13C are provided in parallel with their respective reference points 12 being matched. On the back surface of the scale body 10, three types of cutting length scales 14A, 14B, and 14C corresponding to the winding number scales 13A, 13B, and 13C are provided on one side in the width direction so that the reference point 12 is matched. On the other side, a normal scale 15 with the reference point 12 set to 0 is provided.

The specifications of the cable 2, the air tight tape 6, and the cable insertion hole 8 are as follows. Types of the end face plate 5: A, B, C Inner diameter of the cable insertion hole 8 (Circumference) A: 40 (125.6) mm B: 53 (166.4) mm C: 70 (219.8) mm Type of cable 2 A: 11 to 40 mm, branching B: 11 to 53 mm , For branching C: 11 to 70 mm, for one line (for branching, a single cable is branched into two or more lines, and two or more cable insertion holes are formed in the end face plate. ) Tape 6 Thickness: about 2 mm Material: Made of rubber A winding number scale 13 and a cutting length scale 14 are provided based on these dimensions A, B, and C. Since the scales of the winding number scale 13 and the cutting length scale 14 are the same as those in the related art,
Omitted.

In the above configuration, the long scale body 10 is wound around the cable 2 with the surface of the long scale body 10 facing outward, and the cable is wound around the end plate 5 of type A as shown in FIG. When attaching the cable 2, look at the tape winding number scale 13 A and check the reference point 1.
Read the number indicated by 2 and check the number of turns of the tape. If the number of the winding number scale 13A is 5, for example,
Wind the cable 6 around the cable 2 five times. After the tape 6 is wound, the tape is wound around the tape 6 with the back surface of the long scale body 10 facing outward, and the tape cutting length scale 14A where the reference point 12 is located is viewed. Then, the length indicating the tape cutting length (the dimension between the zero point 16 and the reference point 12) is read. If the read length on the cutting length scale 14A is 5 cm, the position of 5 cm from the cutting end face of the tape 6 is determined using the normal scale 15 and cut there. The tape cutting length is checked again, and if the reference point 12 is located within the allowable range 17, it is judged as pass, and the cable 2 on which the tape 6 is wound is attached to the closure.

[0013]

[Effects of the Invention] As described above, the closure scale of the present invention has various scales on one surface of the long scale body.
A plurality of tape winding scales corresponding to the diameters of the cable insertion holes are provided in parallel with their respective reference points being matched, and a plurality of tapes corresponding to the diameters of the various cable insertion holes are provided on the other back surface. Since the cut length scales are provided so that the respective reference points coincide with each other, the following effects are obtained. (1) Check the number of turns and the cutting length of the tape for sealing.
Regardless of the type of end plate of the closure, the operation can be performed with a single scale, so that work efficiency can be improved. (2) Since one scale is sufficient, the cost of goods and the like can be reduced, and the cost can be reduced.

[Brief description of the drawings]

1A is a front view showing the front surface of the closure scale of the present invention, FIG. 1B is a rear view showing the back surface thereof, and FIG.
3 is a partially enlarged view of (a), and (d) is a partially enlarged view of (b).

FIG. 2A is a perspective view showing a state in which the number of windings of the tape is confirmed, and FIG. 2B is a perspective view showing a state in which the tape cutting length is confirmed.

FIG. 3 is a partial sectional perspective view showing a closure.

FIGS. 4A, 4B and 4C are plan views showing three types of conventional closure scales. FIGS.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closure 2 Cable 3 Connection part 5 End plate 6 Tape 8 Cable insertion hole 10 Scale body 11 U-shaped base 12 Reference point 13 Number of turns scale 14 Cutting length scale 15 Normal scale

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ichiro Shiraishi 1-6-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Tadashi Hattori 1-25, Himonya, Meguro-ku, Tokyo No. 17 Inside Toto Souken Co., Ltd.

Claims (1)

(57) [Scope of request for utility model registration] When winding a tape for sealing between a cable insertion hole of a closure and a cable, a flexible long scale body is provided around the cable. Wrap, tape
The number of turns of the tape wound around the cable is checked by the scale of the number of times of tape winding, and after winding the tape, the tape cutting length is checked by the tape cutting length scale. On one surface of the long scale main body, a plurality of tape winding scales corresponding to the diameters of various cable insertion holes are provided in parallel with their respective reference points being matched, and the other back surface is provided. To
A closure scale, wherein a plurality of tape cutting length scales corresponding to the diameters of various cable insertion holes are provided in such a manner that their respective reference points coincide with each other.