Pipe joints or couplings – Pipe to discreet nipple or sleeve to plate – Plate clamped between flanged nipple and separate fastener
Reexamination Certificate
1999-03-16
2001-04-03
Arola, Dave W. (Department: 3627)
Pipe joints or couplings
Pipe to discreet nipple or sleeve to plate
Plate clamped between flanged nipple and separate fastener
C285S206000, C285S903000, C285S906000
Reexamination Certificate
active
06209929
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a spiral pipe mounting connector which, when a cable protect pipe line for an electric cable, a telephone cable, an optical cable and the like is embedded into the ground, is used to connect a spiral pipe to a hand hole, a manhole and the like to be disposed as a relay for the cables.
Conventionally, when laying a cable pipe line in the ground, as a relay for a cable, there are formed hand holes or manholes (which will be hereinafter referred to as a hand hole for representing both of the hand hole and manhole) at every proper intervals in the cable pipe line. To form the hand hole, as shown in
FIG. 2
, the ground is dug by a desired depth to form a hole, and concrete is then placed into the thus dug hole to thereby form the peripheral wall (side wall) of a hand hole H. At the same time when the hand hole H is formed, in the side wall of the hand hole H, there is formed a through hole h which communicates both of the exterior and interior of the hand hole H and is used to connect a pipe member P for forming the cable pipe line. That is, the pipe member P for forming the cable pipe line is connected to the through hole h.
And, conventionally, in order to connect the pipe member P to the side wall W of the hand hole H, mortar is charged into a gap formed between the through hole h of the side wall W and the pipe member P inserted into the through hole h and the mortar is hardened to thereby fix the pipe member P to the hand hole H as well as prevent water from penetrating into the hand hole H.
However, in the above-mentioned conventional method or structure for connecting a pipe member P to a hand hole H, the mortar charging operation requires experience, the need to secure the water preventive condition requires time and labor, there is needed an operation to prevent the leakage of the mortar, and there is needed the time for waiting for the hardening of the mortar. Therefore, even when the connection of the pipe member P to the hand hole H is completed, it is not possible to carry out immediately an operation to insert and wire an electric cable or the like into the pipe member P.
SUMMARY OF THE INVENTION
The present invention aims at eliminating the drawbacks found in the above-mentioned conventional connecting means for connecting the pipe member P to the hand hole H. Accordingly, it is an object of the invention to provide entirely new manner, that is, an entirely new spiral-shaped pipe member mounting connector in which an operation to mount and fix a pipe member to a hand hole can be executed quite easily and quickly and, as soon as the pipe member mounting and fixing operation is completed, an operation to wire and insert an electric cable or the like into the pipe member can be executed.
Also, it is another object of the invention to provide a spiral-shaped pipe member mounting connector which allows the pipe member mounting and fixing operation to be executed quite easily and quickly not only regardless of the thicknesses of the wall members and the uneven surfaces or deformed surfaces of the wall members but also regardless of the size of a pipe member mounting through hole formed in the side wall of the hand hole.
The above-object can be attained by a connector for mounting a pipe member having a spiral-shaped wall to a through hole (h) formed in a wall member, the connector according to the present invention comprising:
a bellmouth including an engaging projection which is engageable with the inner peripheral surface of the pipe member and a flange radially extended in a radial direction thereof;
a holder including a spiral-shaped projection which is formed on the inner peripheral surface of a cylindrical-shaped portion thereof and fittingly engageable with the outer periphery spiral-shaped portion of the pipe member; and
a waterproof packing member disposed on at least one of a position between the wall member and the holder and a position between the wall member and the flange.
In the above-mentioned construction of the connector according to the present invention, it is preferable to further comprises:
a C-shaped ring including a barrel portion with a cut groove extending in the axial direction thereof, and a flange portion projecting in the radial direction thereof, the C-shaped ring being disposed on the opposing side to the watertight packing member about the wall member and also being disposed on at least one of a position between the wall member and the holder and a position between the wall member and the flange of the bellmouth; and
a cylindrical-shaped tapered spacer which can be fitted into the C-shaped ring, to thereby spread out the barrel portion of the C-shaped body,
wherein the barrel portion and an cylindrical-shaped tapered portion of the cylindrical-shaped tapered spacer are interposed between the wall member and the pipe member in a radial direction of the pipe member.
In the above-mentioned construction of the connector according to the present invention, it is more preferable to further comprises:
a washer member interposed on at least one of a position between the watertight packing member and the flange of the bellmouth and a position between the watertight packing member and the holder.
In the above-mentioned construction of the connector according to the present invention, it is moreover preferable that the wall member is a side wall forming a hand hole or a manhole.
In attaining the above object, according to the invention, there is provided a spiral-shaped pipe member mounting connector relating to the first structure. Referring to the present spiral-shaped pipe member mounting connector by means of reference characters used in the embodiments thereof, the connector is a connector for mounting a pipe member P having a spiral-shaped wall to a through hole h formed in a wall member W, and in particular, the connector comprises: a bellmouth
1
including on the outer periphery
12
of a cylindrical-shaped portion
11
thereof a plurality of engaging projections
13
engageable with the inner peripheral surface of said pipe member P; a holder including on the inner peripheral surface
22
of a cylindrical-shaped portion
21
thereof a spiral-shaped projection
23
which can be fitted with the outer periphery spiral-shaped portion of the pipe member P; and a watertight packing member
3
disposed on the wall member W side of the holder
2
.
Also, according to the invention, there is provided a spiral-shaped pipe member mounting connector relating to a second structure. The present connector, as described above, is a connector which is used to connect the spiral-shaped pipe member P to the through hole h formed in the wall member W. In particular, the present connector comprises: a bellmouth
1
including on the outer periphery
12
of a cylindrical-shaped portion
11
thereof a plurality of engaging projections
13
engageable with the inner peripheral spiral-shaped portion of the pipe member P, and also including, one end side thereof, a flange
14
projecting in the outer peripheral direction thereof; a fastening holder including on the inner peripheral surface
22
of a cylindrical-shaped portion
21
thereof a spiral-shaped projection
23
fittable with the outer periphery spiral-shaped portion of the pipe member P; a watertight, annular-shaped packing member
3
disposed on the wall member W side of the flange
14
of the bellmouth
1
or on the wall member W side of said holder
2
; a C ring
5
disposed on the opposing side to the watertight packing member
3
with the wall member W between them, in particular, on the wall member W side of the holder
2
or on the wall member W side of the flange
14
of the bellmouth
1
, while the C ring
5
includes a barrel portion
51
having a cut groove
53
formed so as to extend in the axial direction thereof and a flange portion
52
projecting in the peripheral direction thereof; and, a tapered, cylindrical-shaped spacer
6
which can be fitted into the C ring
5
to thereby spread out the barrel position
51
of the C ring
5
.
Fujiwara Toshifumi
Ikegami Hiroshi
Kikumori Yasuhiro
Morimatsu Toshio
Someda Noboru
Arola Dave W.
McGuireWoods LLP
Totaku Industries, Inc.
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