JPH05153721A - Temporary joint of cable - Google Patents

Abstract

PURPOSE:To realize quick tightening operation of tightening band by pivoting a forked lever, at the tip thereof, to the flange of a bracket located at the other end of the tightening band through a pin which is pivoted thereabout while furthermore inserting a tightening bolt into a lateral hole of the pivot pin. CONSTITUTION:A U-shaped bracket 201 having a hook is secured to one end of a tightening band B and a forked lever 210 is pivoted, at the tip thereof, to the flange 204 of a U-shaped bracket 203 coupled to the other end of the tightening band B through a pin 211. A pivot pin 206 is pivoted to the vicinity of the tip of the forked lever 210. A bolt 205 is inserted into a lateral hole of the pivot pin 206 and coupled rotatably while furthermore a pin 208 to be engaged with a hook is screwed to a tightening bolt 205. Axial movement of the tightening bolt 205 is substantially caused by rising/tilting of the forked lever 210. According to the constitution, tightening work of the tightening band B can be carried out readily and quickly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a temporary reconnecting portion for temporarily sealing after temporarily disassembling a temporary connecting portion of a communication cable which is waterproof and airtight.
This is effective for disassembling and re-sealing work of the hermetically-sealed portion and for simplifying the work.

[0002]

2. Description of the Related Art A connection work of a communication cable involves connecting hundreds of core wires, and therefore one connection work takes a long time. Often, temporary waterproofing is applied to this. In this case, it is necessary to break the temporary seal to restart the connection work. If the work cannot be completed even after the work is resumed, the waterproof and airtight treatment will be performed again. It takes a long time to disassemble and reseal the temporary connection portion, which significantly affects the efficiency of the cable connection work. When the material used for this temporary waterproof and airtight treatment is unreusable due to the disassembly of the temporary connection portion, the material cost for the rewaterproof and airtight treatment cannot be ignored. Under such circumstances, various measures have been taken to enable repeated use of the material as much as possible and to facilitate temporary waterproofing and airtight processing work and disassembly work of the temporary connection portion. As a publicly known technique of this kind, Jpn.
There is one described in Japanese Patent No. 2 publication. As an improved technique of this known technique, it is necessary to further improve the efficiency and efficiency of the waterproof and airtight treatment work, and to eliminate the use of a new material for resealing, thereby reducing the material cost. There are issues that have been fully solved. This conventional technology (hereinafter referred to as "prerequisite technology") is described in Japanese Patent Application No. 2-3.
Which is described in the specification of No. 23216,
It is not known. Below, an outline of this prerequisite technology is shown in FIG.
This will be described with reference to FIGS. Cables C ₁ , C ₂ , C ₃ are provided in the circular notches 14, 14 of the end plate 11 in FIG.
Are fitted and grasped, and the cables C ₁ , C ₂ and C ₃ are attached to the end plate 11. For the right end plate 11
The plug 21 is fitted into the remaining circular notch to close it. After fitting the outer circumference of the end plate 11 to the inner peripheral portions of the C-shaped rings 63 and 64 at both ends of the airtight sheet 61, the fasteners 66 and 67 are fitted. The flexible sheet 65 is folded back into a U shape, and both ends thereof are filled with a sealing material, the both ends are overlapped with the outer circumferences of the C-shaped rings 63 and 64, and both ends of the fasteners 66 and 67 are U-shaped cutout recesses 63 'of the C-shaped ring. , 64 'to join the fasteners 66, 67 together. Then, the tape is pressed by the adhesive tape 68 and fixed to the outer circumferences of the C-shaped rings 63 and 64. A sealing material such as grease is applied to the abutting end faces f, f of the C-shaped ring to seal the abutting faces. C
The tightening band B is wound around the outer circumference of the mold ring and tightened by the tightening metal fitting S to fix the C mold ring to the outer circumference of the end plate.
Thereby, the both end plates 11, 11 are connected to each other via the airtight sheet 61. Next, the protective cover 91 is wrapped around the outer periphery of the airtight sheet 61 to secure the fasteners 94, 9 in the vertical direction.
5 and connect both ends of the protective cover 91 with the band B
Fixed to the outer circumference of. The end plate 11 is a split-type disc that allows four cables to pass through the end plate, and is composed of a central portion 12 and three upper and lower portions 13, 13. Semi-circular notches 14 and 14 are provided on the mating surfaces of the central portion 12 and both side portions 13 and 13, a long groove 15 is provided on the outer periphery of the central portion 12, and recesses 16 are provided on both outer peripheral ends of both side portions. It is provided. Central part 12 and side parts 1
The bolts 3 and 13 are connected by a bolt 17 and a nut 18. In this state, the bolt 17 and the nut 18 are embedded in the recess 16 and the long groove 15 and do not project onto the outer peripheral surface of the end plate 11. The notches 14 on the mating surfaces of the central portion 12 and the side portions 13 are combined to form a circular hole, and the cable is hermetically held in this hole. When one cable penetrates the end plate, the remaining three holes are closed by the plug 21. The plug 21 has a shape shown in FIGS. 14 and 15, and is a rubber cylindrical plug. The plug 21 is a hollow cylindrical body with a bottom, and an annular groove 22 is provided on the outer circumference thereof. The width b of the groove 22 is equal to the thickness t of the end plate 11. The diameter d of the bottom of the groove is slightly larger than the inner diameter of the hole formed by the notches 14 and 14, and the peripheral edge of the notch 14 is airtightly fitted into the groove 22. A gas valve 24 is provided at the center of the bottom 23 of the plug 21. When mounting a plurality of plugs on one end plate, it is sufficient that at least one of the plugs is provided with the gas valve 24, and it is not always necessary to provide the gas valve for all the plugs. For example, when one cable is passed through, plugs 21 are fitted into the remaining three holes to close the holes. It is sufficient that one of the three plugs has a gas valve. After the temporary reconnection portion of the cable is sealed with an airtight sheet, the gas valve 24 is used to fill the sealed chamber with an inert gas. Airtight sheet body 62 of airtight sheet 61
Is a rubber waterproof sheet of high elasticity and high tensile strength that has been conventionally used in so-called rubber boats and the like, and its both ends are wound around the outer circumferences of C-shaped rings 63 and 64 having a U-shaped cross section. Adhere with, and press it with the reinforcing tape to fix it airtightly. U-shaped notches are formed in the vicinity of one side end of the inner portion of the outer periphery of the ends of the C-shaped rings 63 and 64 to provide notch recesses 63 'and 64'. Airtight sheet body 62
One side edge of the airtight flexible sheets 65, 65 is airtightly adhered to the side edge of the C-shaped ring 6 at both ends.
Overlaid on the outer circumference of 3, 64. Fasteners 66 and 67 are adhered to the outer surface of the other side edge of the flexible sheet, that is, the free edge. The fasteners 66 and 67 are a female member having a C-shaped groove 66 'and a T-shaped protruding member 67' having a plastic cross section having the same length as the flexible sheet 65.
By fitting the T-shaped projection 67 'into the C-shaped groove 66' of the female member, both fasteners are airtightly coupled. The female fastener 66 has a C-shaped groove 66 ', and the male fastener has an elastic lip 67 "spaced from the T-shaped protrusion in the same direction as the T-shaped protrusion 67'. 6
When the 7'is press-fitted into the C-shaped groove 66'and the fasteners are connected to each other, the elastic lip 67 "is inserted into the female fastener 6.
6 is pressed against the side surface. By combining both male and female fasteners, the flexible sheet 65 of the male fastener is folded back into a U shape, and both fasteners 66, 67 are fitted in the U-shaped notch recesses 63 ', 64' of the C-shaped rings 63, 64. To be crowded. At this time, the flexible sheet 65 of the female fastener 66 is pulled so that both ends of the C-shaped rings 63 and 64 are pressed against each other by the tension and the outer circumference of the pressed surface is covered. In a state where the flexible sheet of the male fastener is folded back in a U shape, the inner surfaces of both ends thereof are filled with a sealing material such as grease, and the both ends of the flexible sheet are pressed by the adhesive tape 68, and the adhesive tape is a C-shaped ring 63, Both ends of the flexible sheet, which is adhered to the outer periphery of 64 and folded back in a U shape, are fixed to the outer periphery of the C-shaped ring. Both ends of the flexible sheet are filled with grease and pressed by the tape 68, so that both ends are sealed. The length of the adhesive tape 68 only needs to be long enough to press the end portion of the flexible sheet. The tightening band B is wound around the C-shaped ring and is tightened by the tightening metal fittings S at both ends thereof to tighten the C-shaped ring. By applying a sealing material such as grease to the abutting end faces f of the C-shaped rings 63 and 64, it is possible to prevent the enclosed gas from leaking from the abutting end faces. Next, regarding the protective cover 91, the protective cover is a sheet material having water resistance, weather resistance and tensile strength, similar to the conventionally known protective cover, and fasteners 94 and 95 are attached to both side edges thereof. ing. A bracket 2 having a U-shaped cross section at one end of the tightening band B.
01 is fixed, and the left and right flanges 202 of the bracket 201 are hooks. Further, a similar U-shaped bracket 203 is fixed to the other end of the tightening band B, and the left and right flanges 204 of the bracket 203,
Both ends of a pivot pin 206 of a tightening bolt 205 are rotatably supported by 204. The tightening bolt is inserted through the lateral hole at the center of the pivot pin, and the bolt 205 is prevented from moving in the axial direction by the retaining piece 207, whereby the tightening bolt is rotated with respect to the pivot pin. Only the movement is freely connected. Bolt is locking pin 2
08 is screwed into the horizontal screw hole, and both ends of the locking pin 208 are provided on the left and right flanges 202, 202 of the bracket 201.
After being hooked on the hook, the connecting bolt is rotated to draw the brackets 201 and 203 toward each other, and the tightening band B is tightened.

[0003]

The above-mentioned conventional technique (hereinafter referred to as "prerequisite technique") has the following points to be improved. That is, the tightening band is attached to the airtight sheet 61.
In order to hook both ends of the locking pin 208 on the hooks of the flange 202 of the bracket 201 after winding around the outer circumference of both ends of the locking pin 208, it is necessary to move the locking pin 208 to near the tip of the bolt. Therefore, in order to sufficiently tighten both outer circumferences of the airtight sheet with the tightening band, the tightening stroke by the tightening bolt 205 is considerably long, which requires a lot of time for this tightening work and the work efficiency thereof is extremely poor. Therefore, an object of the present invention is to reduce the tightening stroke by the bolt by moving the bolt itself with respect to the bracket 201 easily and quickly and then performing the tightening by the bolt.

[0004]

Means taken for solving the problems Means taken for solving the above problems are constituted by the following elements (a) to (b). (A) The tip of the bifurcated lever is pivotally supported by a pin on the flange of the bracket at the other end of the tightening band, and the pivot pin is pivotally mounted near the tip of the lever. (B) In the lateral hole of the pivot pin. Insert the tightening bolt and connect it so that it can rotate freely.

[0005]

[Operation] When the tightening band is wound around the outer circumferences of both ends of the airtight sheet 61 and then the lever is raised, the tightening bolt is pushed by the lever toward the bracket at one end of the tightening band. In this state, engage the locking pin screwed into the tightening bolt with the hook on the flange of the bracket at one end of the tightening band, and then tilt the lever to pull the tightening bolt and move one bracket toward the other bracket. Attract to. As a result, the tightening band is quickly tightened, and the tightening operation of the tightening band is completed by only slightly turning the tightening bolt. That is, most of the axial movement of the tightening bolt for engaging and disengaging the locking pin with the hook of the flange of the tightening band, and the axial movement of the tightening bolt for tightening the tightening band,
Since the operation of raising and lowering the lever is performed, the tightening work of the tightening band is extremely quick and easy. Since the position of the tightening bolt when the lever is tilted is below the pin serving as the fulcrum of the lever (so-called center over), the lever is self-held in the tilted state by the pulling force of the tightening bolt. Regarding the relationship between the locking pin and the tightening bolt, the bolt may be directly screwed into the horizontal screw hole of the locking pin, but the bolt is passed through the horizontal hole of the locking pin and the nut is screwed at the end thereof. It is mechanically simpler and desirable.

[0006]

EXAMPLES Next, examples of the present invention will be described with reference to FIGS. The end plate 100 is a split mold having a central portion 101 and two outer portions 102, and three semi-circular beads 104 having a V-shaped cross section are provided along the inner peripheral surface of the semi-circular cutout 103. ing. The bottom side width b of this V-shaped bead is about 3 mm, and the height h is about 2 mm. Further, a semicircular flange 106 protruding inward in the radial direction is formed on the outer side surface 105 of the central portion 101 and the outer portion 102 (the surface facing the outside when assembled with an airtight sheet or the like) on the circumferential surface of the semicircular cutout 103. It is provided along. Furthermore, the outer side surface of the flange is always provided with a recess 107 communicating with one or two of the semicircular cutouts. Furthermore, the central portion 101,
Through holes 108 through which the bolts are inserted are provided on the mating surfaces at both ends of the outer portion 102 as in the prior art, and the central portion 1
01, the same through hole 108 is provided in the center of the outer portion 102. Bolts are respectively passed through these three bolt holes, and the central portion and the outer portion are tightened and fixed at three points. The U-shaped brackets 201 and 203 at one end and the other end of the tightening band of the present invention are the same as those of the prior art. The tip of the bifurcated lever 210 is fitted inside the U-shaped bracket 203, and the left and right tips are pivotally attached to the flanges 204, 204 of the bracket 203 by separate pins 211. A pivot pin 206 of a tightening bolt is pivotally attached near the forked end of the lever 210. In this example, the tightening bolt 205 is inserted into the lateral hole of the locking pin 208, and the nut 212 is screwed into the bolt 205. When the bolt is pulled rearward, the nut 212 is fitted into the notch 213 on the front surface of the locking pin and is prevented from rotating. Bifurcated lever 21
When 0 is raised, the tightening bolt 205 is pushed forward (in the direction of the arrow X), and the locking pin 208 thereof is attached to the bracket 2.
Move to the front of 01 hook. Then, when the lever 210 is tilted, the tightening bolt 205 is pulled backward (in the direction of the arrow Y), the locking pin engages with the hook of the bracket 201, and the bracket 201 is pulled toward the bracket 203. As a result, the tightening band B is tightened largely, and when the tightening bolt is further rotated slightly, the tightening work of the tightening band is completed. In the state where the lever is tilted, the center of the tightening bolt 205 is located below the center of the pin 211 serving as the fulcrum of the lever, and the pulling force gives the lever 210 a moment in the direction of arrow M.
This moment causes the lever 210 to be held by itself in the tilted position. The lever may be a U-shaped lever as a whole, but may be a Y-shaped lever with a forked tip. By raising the lever, the tightening bolt moves forward and the locking pin 208 disengages from the hook of the bracket 201.

[0007]

[Effect] The prerequisite technique of the present invention is novel, and the above-mentioned problems of the present invention are novel. Therefore, solving the problems described above and solving the problems inherent in the prior art is an effect peculiar to the present invention. That is, according to the present invention, the lever is raised and the locking pin is engaged with the hook of the bracket at one end of the tightening band, and the bracket at one end can be largely pulled to the bracket at the other end by tilting the lever, and thus the tightening bolt Since the tightening band can be sufficiently tightened only by rotating a little, the unique effect that the tightening operation of the tightening band can be performed quickly and easily is brought about. Further, in the prior art, the left and right flanges 204, 20 at the other end of the tightening band are
4, a pivot pin 206 is pivotally attached, and there is a retaining piece 207 for preventing the axial movement of the tightening bolt 205 inserted through the lateral hole of this pivot pin. For this reason, the tightening bolt 205 is pivotally supported. It can only be rotated with respect to the pin 206 and cannot be pulled out from the lateral hole of the pivot pin 206 (see FIG. 21). Therefore, if the threads of the bolts and nuts are damaged and become unusable, the entire tightening band becomes unusable. However, in the tightening band of the present invention, the tip of the bifurcated lever is pivotally supported by the pins 211, 211 on the flanges 204, 204 of the bracket 203 at the other end, and the pivot pin 206 is pivotally mounted near the tip of the lever. Since the tightening bolt 205 is slidably inserted into the lateral hole of the pivot pin and connected rotatably, it is not necessary to provide the retaining piece 207. Therefore, when necessary, the tightening bolt can be pulled out from the lateral hole of the pivot pin 206 at any time, and when the thread of the bolt or nut is damaged,
It can be removed from the pivot pin 206 and replaced with a new one.

[Brief description of drawings]

FIG. 1 is a front view of a central portion of an end plate of the present invention.

2A is a front view of FIG. 1, FIG. 2B is a sectional view taken along line AA of FIG. 2A, and FIG. 2C is a sectional view taken along line BB of FIG.

3A is a rear view of FIG. 1, and FIG. 3B is a view taken along line XX of FIG.

FIG. 4 is a front view of the outer portion of the end plate of the present invention.

5A is a front view of FIG. 4, and FIG. 5B is a sectional view taken along line BB of FIG.

6A is a rear view of FIG. 4, and FIG. 6B is a sectional view taken along line AA of FIG.

FIG. 7 is an assembly drawing of the end plate of the present invention.

FIG. 8 is a side view of FIG.

FIG. 9 (a) is a front view of the tightening band of the present invention,
(B) is a view of the tightening fitting of (A) as viewed from the direction of arrow A.

10 is a perspective view of the tightening bolt, pivot pin, and locking pin of FIG. 9. FIG.

FIG. 11 is a partially longitudinal front view of a conventional technique.

12 is a sectional view taken along line XX of FIG.

FIG. 13 is a perspective view of a prior art end plate.

FIG. 14 is a perspective view of a prior art plug.

FIG. 15 is a front view of the plug of FIG.

16A is a perspective view of a conventional airtight sheet, FIG.
(B) is an YY enlarged sectional view of (A).

FIG. 17 is a partially enlarged view of FIG.

18 is a sectional view taken along line BB of FIG.

FIG. 19 is a partially enlarged sectional view of the airtight sheet of FIG. 16 (a) in a closed state.

FIG. 20 is an end view of the male part of the fastener of FIG.

FIG. 21 (a) is a front view of a conventional tightening band,
(B) is a view of the fastening portion in (A) as viewed from the direction of arrow A.

[Explanation of symbols]

 62 ... Airtight sheet body 65 ... Flexible sheet 66, 67, 94, 95 ... Fastener 91 ... Protective cover 100 ... End plate 101 ... Central part 102 ... Two outer sides Part 103 ... Semi-circular cutout 104 ... V-shaped bead 105 ... Outer side surface 106 ... Semi-circular flange 107 ... Recess 108 ... Through hole 201, 203 ... U Mold brackets 202, 204 ... Flange 205 ... Tightening bolt 206 ... Pivot pin 207 ... Locking piece 208 ... Locking pin 210 ... Bifurcated lever 211 ... Pin 212. ..Nuts 213 ... notches B ... tightening bands S ... tightening fittings

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Riichi Inoue 1-12-23 Tajiri Ichikawa City, Chiba Daiichi Gijutsu Sangyo Co., Ltd. (72) Inventor Osamu Hoshino 1-chome Tajiri, Ichikawa City, Chiba Prefecture No. 12-23 No. 1 Daiichi Gijutsu Co., Ltd. (72) Inventor Satoshi Matsuhashi 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Yuji Kotani Tokyo Nihon Telegraph and Telephone Corporation, 1-6, Uchisaiwaicho, Chiyoda-ku (72) Inventor Kiyoshi Takahashi 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Yutaka Ozaki 1 8-12, Ueno, Iwatsuki City, Saitama Prefecture, Fujikura Rubber Industry Co., Ltd. Iwatsuki Factory (72) Inventor: Yasao Kobayashi, 8-12, Ueno, Iwatsuki City, Saitama Prefecture Fujikura Rubber Industry Co., Ltd. Iwatsuki Factory (72) inventor small bevel Tsuyoshi Hara Saitama Prefecture Iwatsuki City Ueno 6-chome 12 address of 8 Fujikura Rubber Industry Co., Ltd. Iwatsuki in the factory

Claims (1)

[Claims] 1. A circular notch in a resin end plate allows a cable to be detachably gripped, and both ends of an airtight sheet made of a rubberized waterproof cloth are wrapped around the end plate, and both outer peripheries of the airtight sheet are fastened at both ends by tightening bands. It is fixed to a plate, both ends of the airtight sheet are detachably connected with vertical fasteners, the protective cover is covered on the airtight sheet, and both ends of the protective cover are detachably connected with vertical fasteners. Both ends of the main body are adhered and fixed to the outer periphery of the rubber C-shaped ring to form the airtight sheet, the inner peripheral surface of the rubber C-shaped ring has a U-shaped cross section, and the rubber C-shaped ring has a circumferential cross section near one end. A U-shaped cutout is provided, one side edge of each flexible sheet is attached to each side edge of the airtight sheet, and both ends of these flexible sheets are overlapped with the outer circumference of the C-shaped ring. On the other edge Attach the plastic-made fasteners,
The fastener is a female member having a C-shaped groove in cross section and a male member having a T-shaped protrusion and having a length substantially the same as that of the flexible sheet. A rubber C-shaped ring is fitted to the outer periphery of the end plate. In the structure of the temporary reconnecting part, in which both end plates are connected to each other via the airtight sheet, a U-shaped bracket having a hook is fixed to one end of the tightening band, and is attached to a flange of the U-shaped bracket connected to the other end. The tip of the bifurcated lever is pivotally attached by a pin, and a pivot pin is pivotally attached in the vicinity of the tip of the lever, and a tightening bolt is inserted into the lateral hole of the pivot pin to rotatably connect and to the tightening bolt. The structure of the temporary reconnection part of the cable in which the locking pin that engages with the hook is screwed.