Rotary cleaning device for drain pipe and the like

A rotary cleaning device for drain pipes and the like wherein a universal guide is connected to a nozzle provided at a tip of a high-pressure hose, and the tip of the high-pressure hose is drawn out into the pipe and high-pressure water from the nozzle is jetted radiantly in a slant rearward direction of the nozzle, and the tip of the high-pressure hose is arranged to advance along the pipe sequentially while the high-pressure hose is rotated, whereby the direction of the nozzle is changed according to the rotation of the high-pressure hose, and the nozzle is rotated spirally along the inner wall of the pipe by the change.

BACKGROUND OF THE INVENTION 
The head of a tip of a conventional high-pressure hose is composed of a 
nozzle formed with a plurality of jet holes for jetting high pressure 
water aslantly in the rearward direction radiantly, and a universal guide 
connected to the tip of the nozzle. 
The foregoing high-pressure hose, as disclosed in the Japanese utility 
model publications No. 55-20380 and No. 49-37402, is housed in a rotary 
drum, and the high-pressure hose is rotated by the revolution of the 
rotary drum. The nozzle of the tip of the high pressure hose, as disclosed 
in the Japanese patent laid open publication No. 54-110658, advances while 
revolving inside of a drain pipe by a propulsion force by the high 
pressure water jetted from the nozzle and a draw-out operation of the high 
pressure hose from the rotary drum to clean the inside of the drain pipe. 
When a high-pressure hose is rotated in the vertical pipe and the nozzle 
connected to the high-pressure hose is rotated in the vertical pipe, the 
nozzle revolves along the inner wall of the pipe. In this condition, when 
the high-pressure hose is fed into the pipe by being drawn out gradually 
from the rotary drum, the nozzle spirally revolves along the inner wall of 
the pipe. When the drain pipe is a horizontal pipe, even if the 
high-pressure hose is fed while rotating in the pipe, the nozzle advances 
straight forward and does not rotate spirally along the wall of the pipe. 
The high pressure water jet pressure of the nozzle is lowered when it is 
separated from the wall of the pipe so that in order to break the solid 
which is adhered and hardened on the upper portion of the pipe, much 
higher pressure and much more water are required, and thus, the inside of 
the pipe cannot be cleaned uniformly at high efficiency. 
SUMMARY OF THE INVENTION 
This invention relates to rotary cleaning devices for drain pipe and the 
like which are used for cleaning the drain pipe and the like of the piping 
installations in high-rise buildings. 
In the device for cleaning the inside of the pipe by high-pressure water 
that jets from a nozzle provided at a tip of a high pressure hose 
connected to a high-pressure water feeding device, a universal guide is 
connected to the tip of the nozzle and the high-pressure water is jetted 
aslant in a rearward direction of the nozzle radiantly, and the propulsion 
force is generated in the nozzle by the jet force, and the hose is fed 
into the pipe while rotating the high-pressure hose, and the inside of the 
pipe is cleaned by the high-pressure water jetted from the nozzle. In the 
improved device the direction of the propulsion force of the nozzle is 
arranged to change according to the rotation of the high-pressure hose, 
and the nozzle is arranged to revolve spirally in the pipe along the inner 
wall of the pipe. In this construction, the solid adhered material on the 
inner wall of the pipe can be pulverized by the high-pressure portion of 
the jet water jetted from the nozzle, eliminating the loss of quantity of 
a water and cleaning the inside of the vertical pipe and the lateral pipe 
at high efficiency.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
The construction of this invention will be described in the following by 
referring to the attached drawings. 
In FIG. 1, reference numeral 2 denotes a high-pressure hose, and one end of 
the hose is connected to a nozzle 6 by means of a hose joint 4. Jet holes 
8, 8a that are bored at equal intervals around the nozzle 6 are 
communicated with the inside of the hose 2 by means of an axial hole 10 of 
the nozzle 6 and an axial hole 12 of the hose joint 4. The high pressure 
water is jetted aslant in a rearward direction of the nozzle 6 from the 
jet holes 8, 8a, and the propulsion force in a direction parallel to a 
center axial line thereof is generated in the nozzle 6 by the 
high-pressure water. Namely, the jet holes 8, 8a are disposed conically, 
and thus, the propulsion force is generated in the direction parallel to 
the center axial line of the conical shape. A projecting shaft 9 is 
provided at the tip of the nozzle 6 which inclines at a predetermined 
angle .alpha. relative to the center axial line of the nozzle 6, for 
example, inclines 30 degrees. Reference numeral 11 denotes a snake wire 
formed by winding a resilient wire in coil form, and its one end is fitted 
and fixed to the projecting shaft 9. The other end of the snake wire 11 is 
fitted and fixed to a projecting shaft (not shown) provided on a board 15. 
The snake wire 11 inclines at a predetermined angle .alpha. relative to 
the center axial line of the nozzle 6. A hole 16 is perforated at the tip 
of a connecting lever 14 projected on the other surface of the board 15. 
Reference numeral 18 denotes a guide made of a cylindrical metal member, 
and a shaft 20 is mounted in the vicinity of an end of an opening in a 
right angle direction relative to the center axial line of the guide 18, 
and the shaft 20 is loosely fitted in the hole 16. A connecting lever 22 
projects from a center portion of a bottom portion of the guide 18, and a 
hole 24 is formed at the tip of the connecting lever 22 in a direction 
offset by 90 degrees relative to the direction of the hole 16. Reference 
numeral 26 denotes a guide made of a cylindrical metal member, and a shaft 
28 is mounted in the vicinity of an end of an opening thereof, in a 
direction perpendicular to the center axial line of the guide 26, and the 
shaft 28 is loosely fitted to the hole 24. A connecting lever 30 projects 
from a center portion of a bottom portion of the guide 26, and a hole is 
formed on the tip of the connecting lever 30 in the direction having an 
angle of 90 degrees relative to the direction of the hole 24. Reference 
numeral 32 denotes a guide made of a cylindrical metal member, and a shaft 
34 is mounted in the vicinity of an end of an opening thereof in the 
direction perpendicular to the center axial line of the guide 32, and the 
shaft 34 is loosely fitted to the hole of the connecting lever 30. A 
connecting lever 36 projects from the center portion of the bottom portion 
of the guide 32, and a hole 38 is formed at the tip of the connecting 
lever 36 projecting from the other surface of the board 15 in the 
direction having an angle of 90 degrees relative to the direction of the 
hole of the connecting lever 30. Reference numeral 40 denotes a tip guide 
made of a cylindrical metal member, and a shaft 42 is mounted in the 
vicinity of an end of an opening thereof in the direction perpendicular to 
the center axial line of the guide 40, and the shaft 42 is loosely fitted 
to the hole 38 of the connecting lever 36. Each guide 18, 26, 32, 40 is 
rotatable in a range of almost 40 degrees centering around the shafts 20, 
28, 34, 42 relative to the connecting shafts 14, 22, 30, 36 connected to 
the guides. The guides 18, 26, 32, 40 form a universal guide 43. The 
shafts 20, 28, 34, 42 of each guide 18, 26, 32, 40 are mutually offset by 
90 degrees, but they may be set in the same direction. The high-pressure 
hose 2 is connected to a drain outlet of the pump by means of a terminal 
machine 44 as shown in FIG. 5. The terminal machine 44 is constructed in 
such way that the drum for housing the high-pressure hose 2 in coiled 
condition is rotatably disposed, and when the drum is rotated manually or 
by a motor, the high-pressure hose 2 is arranged to rotate. The 
construction of this terminal machine 44 is disclosed in detail in 
Japanese Utility model publication No. 56-36856. By the way, reference 
numeral 46 denotes a drain pipe. 
The operation of the embodiment of this invention will be described in the 
following. 
The cleaning of the drain pipe 46 is carried out by jetting the 
high-pressure water pressurized by the pump through the jet holes 8, 8a of 
the nozzle 6 mounted at the tip of the hose 2. The material adhered to the 
inside of the pipe is pulverized and removed by the high-pressure water 
jetted from the nozzle 6 in the aslant rearward direction of the nozzle 6, 
and at the same time, the nozzle 6 advances in the pipe by the propulsion 
force of the high-pressure water jetted from the nozzle 6 and the 
drawing-out of the high-pressure hose 2 by the manual or an automatic 
operation. In the lateral pipe 46a, as shown in FIG. 5, when the 
high-pressure hose 2 is rotated in the pipe, the snake wire 11 abuts the 
inner wall of the pipe by the rotation of the hose 2, and the direction of 
the nozzle 6 is changed, and as a result, the direction of the propulsion 
force by the high-pressure jet force of the nozzle 6 is tilted relative to 
the lateral cross section of the pipe 46a, and the nozzle 6 is revolved 
spirally along the inner peripheral wall of the pipe by the change of 
direction of the propulsion force. In the vertical pipe 46b, the 
high-pressure hose 2 is rotated at a constant speed, and the nozzle 6 is 
revolved spirally in the inner wall of the pipe by the drawing-out of the 
high-pressure hose 2, and the jet water jetted through a plurality of jet 
holes 8, 8a of the nozzle 6 cleans the inner wall of the pipe evenly with 
efficiency. 
As described in the foregoing, to rotate the nozzle spirally in the lateral 
pipe 46a, it becomes obvious that it can be achieved by changing the 
direction of the propulsion force of the nozzle 6 according to the 
rotation of the high-pressure hose 2. In this embodiment, as means for 
changing the direction of the propulsion force of the nozzle according to 
the rotation of the high-pressure hose, the construction of tilting the 
snake wire 11 for .alpha. degrees relative to the center axial line of the 
nozzle 6 is employed. If the foreging .alpha. degrees is the zero degrees 
like the head of the conventional high-pressure hose, namely, the snake 
wire 11 and the center axial line of the nozzle 6 are on a straight line, 
the direction of the nozzle 6, namely, the direction of the propulsion 
force by the high-pressure jet water is not changed even if the 
high-pressure hose is rotated so that the nozzle 6 is not revolved 
spirally in the lateral pipe 46a. As means for changing the direction of 
the propulsion force of the nozzle 6 according to the rotation of the 
high-pressure hose 2, other various means in addition to the foregoing 
means can be employed. For example, as shown in FIG. 6, the tip of the 
high-pressure hose 2 may be tilted by .alpha. degrees relative to the 
center axial line of the high-pressure hose 2 by a coil like bent spring 
50. In FIG. 6, a bent pipe like metal fitting may be used for the bent 
spring 50. In the embodiment shown in FIG. 6, the snake wire is not fixed 
to the tip of the nozzle 6, and the universal guide 43 is directly 
connected to the projecting shaft 9 of the tip of the nozzle 6, but the 
snake wire may be disposed at a position on an extension of the center 
axial line of the nozzle 6 which is between the nozzle 6 and the universal 
guide 43. Also, as another embodiment, as shown in FIG. 7, a pipe like 
portion 6b of the nozzle 6 is bent for .alpha. degrees, and the tip 6a of 
the nozzle 6 is tilted relative to the tip of the high-pressure hose 2, or 
the snake wire may be provided in this embodiment. Also, as shown in FIG. 
8, the tip portion 6a of the nozzle 6 may be tilted relative to the pipe 
like portion 6b, and the tip 6a of the nozzle 6 may be tilted relative to 
the tip of the high-pressure hose 2. As shown in FIG. 9 and FIG. 10, the 
snake wire 11 may project from the tip 6b of the nozzle 6 and be tilted 
relative to the pipe like portion 6b of the nozzle and the universal guide 
43 may be connected to the snake wire 11.