JP3467737B2 - Moving plug for cleaning sewer pipes - Google Patents

Description

Detailed Description of the Invention

A. OBJECT OF THE INVENTION (1) Industrial field of application The present invention relates to a cleaning device for removing sludge accumulated on the bottom of a sewer pipe, and more particularly to a flow path by expansion of a rubber bag charged in the flow path. The present invention relates to a moving plug that reduces a cross section and cleans sludge accumulated on a pipe bottom by a sweeping force of a discharge flow due to the effect of reducing the cross section.

(2) Prior Art As a method of mechanically removing deposits in a sewer pipe without relying on human power, a gun-shaped nozzle device is arranged in the pipe pipe.
A pressure water stream is supplied to the nozzle device from a ground portion via a hose to generate a jet stream, and the deposit is removed by the jet stream. Then, this hose is inserted through a human hole on the downstream side, and the nozzle device is moved from the upstream side to the downstream side as the hose is wound. However, according to this conventional method, the jet flow is not directionally jetted toward the target sludge on the pipe bottom, the efficiency is poor, and the pressure water generation equipment for driving the jet flow is large, resulting in equipment cost. Inevitably increases. In addition, the hose is buried in the sludge that has been washed away and becomes a resistance, and the movement operation is not performed smoothly,
Further, there are various problems that it is impossible to cope with sudden water discharge.

Therefore, in order to solve the problems of the prior art, the applicant of the present invention, in Japanese Patent Application No. 6-82571 (hereinafter referred to as "prior art") filed earlier, is used for cleaning a sewer pipe. A moving plug for cleaning was proposed. That is, the moving plug for cleaning the sewer pipe is hollow and has a substantially cylindrical shape, and a rubber bag which can be expanded and contracted by a fluid enclosed therein; A guide frame having substantially rigidity that can be opened and closed in response to the expansion of the rubber bag; and the guide frame is in contact with the pipe wall of the sewer pipe to rotate only in the pipe axis direction. It is characterized in that an allowable roller is fixedly provided. According to this, the structure can be simplified, and the removal work can be performed directionally toward the sludge at the bottom of the pipe, whereby an efficient and inexpensive equipment for cleaning the sewer pipe can be realized. .
However, this prior art also has a problem in gripping force against a large water pressure in the integrity of the guide frame and the rubber bag. In addition, there is room for improvement in the speed of contraction operation of the rubber bag.

(3) Problem to be Solved by the Invention The present invention is a further development of the above-mentioned prior art, and it is possible to obtain a large gripping force for a rubber bag and to counter a large water pressure, which results in a large diameter. It is an object of the present invention to provide a moving plug body for cleaning a sewer pipe, which can be applied to the pipe. Still another object of the present invention is to be able to quickly perform the contraction operation of the rubber bag.

B. Configuration of the Invention (1) Means for Solving Problems The moving plug for cleaning the sewer pipe of the present invention has the following configuration to achieve the above object. That is, the main invention thereof is, as described in claim 1, two polar seat portions 1A arranged to face each other along the axial center, and two polar seat portions arranged radially from the polar seat portions 1A. Stretchable portion 1B which is arranged straddling between 1A and is capable of expanding and contracting in the radial direction with a link mechanism.
A plurality of frames 1 provided with; and a rubber bag 2 which is held in the frame 1 and which is hollow and has a substantially cylindrical shape and which is inflatable and contractible by a working gas enclosed therein. In the frame 1, one end of a link arm 18 constituting the expandable portion 1B is pin-held by the pole seat portion 1A, and the other end of the link arm 18 is pin-held by both ends of a frame bar 21 straddling the pole seat portions 1A. Wheels 29 are attached to the frame bar 21, and both end surfaces of the cylindrical portion of the rubber bag 2 are fixed to the pole seat portion 1A of the frame 1, and the frame of the expandable portion 1B of the frame 1 is fixed. Bar 21
It is characterized in that it is held in a penetrating manner. The invention according to claim 2 is limited to the frame 1 according to claim 1, wherein the pole seat portion 1A is fixed to a rib 12 which is arranged orthogonal to the axis and which holds the link arm 18 as a pin. End plate 10, a shaft rod 11 which is planted in the center of the mounting end plate 10 and is arranged along the axis, and a coil which is fitted to the shaft rod 11 and whose one end is fixed to the shaft rod 11. It is characterized in that it comprises a spring 14, and the end of the link arm 18 of the expanding / contracting portion 1B abuts on the other end of the coil spring 14. Claim 3
The invention of claim 1 limits the rubber bag 2 of claim 1, wherein the rubber bag 2 comprises a main air chamber 2A and a sub air chamber 2B, and the main air chamber 2A holds the frame bar 21, The air chamber 2B is arranged on the bottom side of the pipe. The invention according to claim 4 is a further limitation of the rubber bag 3 according to claim 3, wherein the main air chamber 2A is provided with a right-cylindrical nuclear air chamber 1C between the pole seats 1A. It is characterized by

(2) When the working gas is not supplied to the working rubber bag 2, the rubber bag 2 contracts and the frame bar 21 contracts in diameter, and accordingly the link arm 18 also falls toward the pole seat 1A. It is in a state. When the working gas is supplied to the rubber bag 2, the frame bar 21 held by the rubber bag 2 is displaced in the outer diameter direction as the rubber bag 2 expands. Along with this displacement, the link arm 18 expands in diameter with the pivotally connected portion with the pole seat portion 1A as a fulcrum. By expanding the diameter of the link arm 18, each frame bar 21
Are tuned and regularly displaced in the outer diameter direction. This cleaning plug is used by being inserted into a sewer pipe through which a water flow flows. That is, the diameter of the frame 1 is expanded by the expansion of the rubber bag 2, and the wheels 29 are pressed against the pipe wall to fix the frame 1. The rubber bag 2 blocks the water flow and receives the water pressure of the stored water to generate a discharge flow. The frame 1 prevents the rubber bag 2 from being deformed, supports the load, and moves to the downstream side by its wheels 29. According to the second aspect, the link arm 18 is further biased by the spring, so that the frame 1 is quickly contracted. According to claim 3, further
The frame 1 is expanded and contracted by the main air chamber 2A, and the discharge flow is generated by the sub air chamber 2B. According to the fourth aspect, the expanding operation of the main air chamber 2A can be performed more reliably.

(3) Example An example of a moving plug for cleaning a sewer pipe of the present invention will be described with reference to the drawings. 1 to 10 show an embodiment of a moving plug for cleaning a sewer pipe (hereinafter, simply referred to as "moving plug") of the present invention. That is, FIGS. 1 and 2 show the overall configuration, and FIGS. 3 to 10 show the partial configurations of the respective parts.

1 and 2 show the overall construction of the cleaning movable plug S. As shown in FIG. As shown in the figure, the moving plug S has a basic structure including a frame 1 having a frame structure having an expansion / contraction mechanism and a rubber bag 2 held by the frame 1. Then, the frame 1 holds the rubber bag 2 and presses the wheels attached to the outside thereof against the wall surface of the conduit P by the expansion / contraction mechanism thereof. Further, the rubber bag 2 expands and contracts the frame 1 by its expansion and contraction operation, and blocks running water in the pipe P in an expanded state. As shown in FIG. 13, the moving stopper S further includes a tow rope 4 connected to the moving stopper S, a traction adjusting mechanism 5 for winding the tow rope 4, and a rubber for the moving stopper S. A rubber tube 6 as an air conduit for supplying air to the bag 2 and an air supply device 7 are attached.

Hereinafter, these detailed structures will be described. Frame 1 (See FIGS. 1, 2, and 3 to 6) First, the frame 1 will be described. 3 to 6 show the structure of the frame 1. The frame 1 of the present embodiment is arranged radially between two pole seats 1A, which are arranged to face each other along the axis, and bridged between the two pole seats 1A, and a link mechanism. It is composed of a plurality of elastic portions 1B having at least three (5 in this embodiment) wheeled frame bars that can expand and contract in the radial direction. Below, frame 1
The expansion / contraction mechanism will be described.

The pole seats 1A are arranged opposite to each other along the axial center and have the same or substantially the same structure. That is, the pole seat portion 1A has a disc-shaped mounting end plate 10 having a predetermined thickness, and a central axis formed in the center of the mounting end plate 10 and partially or wholly formed in the screw portion 11a. The mounting end plate 10 is mainly composed of
Ribs 12 are fixed to the outside at five locations. Furthermore,
The spring rod fitting 1 is attached to the shaft rod 11 in order from the mounting end plate 10 side.
3, coil spring 14 and nut set 15 (inner nut 15
a, an outer nut 15b), and a cover 16 (outer cover 16a, inner cover 16b) which is fitted onto the coil spring 14 is attached. A link arm 18 is pivotally attached to a rib 12 having a mounting end plate by a pin 19 so as to be up and down.

As for the stretchable portion 1B, each stretchable portion 1B
Have the same or almost the same configuration, and include the long frame bar 2 including the link arm 18 described above.
1. A sliding frame body 22 fitted to the frame bar 21. The frame bar 21 has an elongated body having a rectangular cross section, and has two pole seats 1A that maintain rigidity and maintain a predetermined interval.
The sliding frame 22 with wheels is fitted over both ends thereof. A rib 23 is provided on the sliding frame body 22 so as to incline outwardly toward the center of the shaft. The other end of the above-mentioned link arm 18 is attached to the rib 23 with the sliding frame by the pin 2
It is pivotally attached with 4. The link arm 18 has a J shape, and the tip of the bent portion 18 a presses the coil spring 14 via the spring seat fitting 13. The link arm 18 is allowed to rotate only in one plane, and expands and contracts in the radial direction. Then, with the link arm 18 as the center, the frame bar 21 and the rib 23 that are continuously provided outside the link arm 18, and the rib 12 that is continuously provided inside the link arm 18 and the spring seat fitting 13, The coil spring 14 and the nut set 15 constitute an expansion / contraction mechanism.

(Sliding frame body 22) The sliding frame body 22 has a hole 22a formed in the body for receiving the frame bar 21, and is slidably fitted to the frame bar 21. The ribs 23 project inward from the sliding frame 22 as described above. The sliding frame body 22 is fixedly held by a fixing bolt 26 with respect to the frame bar 21 so that its position can be adjusted. That is, the degree of expansion of the link arm 18 is determined by adjusting the position of the sliding frame body 22. Axle shafts 28 are provided on both side surfaces of the sliding frame 22, and wheels 29 are attached to the axles 28 with or without bearings (rolling or sliding bearings).
Two wheels 29 are arranged in a pair on one sliding frame body 22, and constitute a so-called wheel group. The wheel 29
Has an acute angle, and freely rolls in the axial direction of the tube, and prevents lateral displacement by the edge in the circumferential direction of the tube. Wheel 29
In principle, the same configuration is adopted, but the shape may be changed appropriately. In this embodiment, the wheels 29 of the frame 1 at both lower ends are
For, the roundness is formed at the edge in consideration of slippage. (Guide frame 31) At the tip of the frame bar 21,
A guide frame 31 that is bent toward the center of the shaft is detachably attached with a fixing bolt 32. 33
Is a hole formed at the tip of the guide frame 31.

(Other configurations of the pole seat 1A) The pole seat 1A
In the mounting end plate 10 of (1), a required number (6 in this embodiment) of connection holes 35 for establishing connection with the rubber bag 2 to be described later are opened at a predetermined interval, and two connecting holes 35 connected to the rubber bag 2 are provided. The air injection hole 36 (main air injection hole 36a, sub air injection hole 36b) is opened. Further, in the shaft rod 11, the outer cover 16a and the inner cover 16b are slidable, and the inner cover 16b
The end surface of is also a spring seat that contacts the end of the coil spring 14. The outer cover 16a can also serve as the spring seat fitting 13. The nut set 15 regulates the movement of the coil spring 14. A hoist ring 39 is attached to the tip of the shaft rod 11 via a connecting fitting 38. The hoist ring 39 is the rod 1.
The hoist ring 3 can be flexed freely with respect to 1.
The tow rope 4 is connected via 9.

Rubber bag 2 (see FIGS. 1, 2, and 7 to 10) The rubber bag 2 expands and contracts due to the air pressure introduced into the rubber bag 2, and in the expanded state, taper surfaces of appropriate angles are formed on the front and rear surfaces. It has a substantially cylindrical shape and is partitioned into a main air chamber 2A and a sub air chamber 2B via a diaphragm 41 inside thereof. That is, the main body of the rubber bag 2 includes a pair of end plates 42 (outer end plate 42a, inner end plate 42b) arranged at both ends in the axial direction,
A rubber body 43 is hermetically sandwiched and held on the end plate 42. The rubber body 43 has a cylindrical shape at the center, and has a shape in which both ends are reduced in diameter toward the ends. Then, in the rubber body 43, a diaphragm 4 also made of a rubber body is provided near the lower part.
1 is integrally fixed, and has a large capacity upper air chamber 2A
And a small capacity sub-air chamber 2B at the bottom.

More specifically, a screw rod 45 for connecting to the mounting end plate 10 of the frame 1 is planted in the end plate 42 in phase with the connecting hole 35 of the mounting end plate 10. A nut 46 is screwed onto the rod 45. Further, two air injection holes 47 are opened corresponding to the air injection holes 36 of the mounting end plate 10. 47a is a main air injection hole that communicates with the main air chamber 2A.
Reference numeral 7b is a sub-injection hole that communicates with the sub-air chamber 2B. Then, in the sub-injection hole 47b, the air conduit 4 guided to the diaphragm 41.
8 are connected. Moreover, ribs 50 are provided so as to project from the facing portion of the end plate 42, and a diameter expansion restricting rope 51 is stretched between these ribs 50. The main air chamber 2A has a frame bar 2
Sheath bags 55 that hold 1 in a penetrating manner are arranged at five locations corresponding to the respective frame bars 21. The sheath bag 55 is airtight and flexible. On the outside of the center of the rubber bag 2,
A large number of rubber plates 57 are attached to the front and rear two rows along the circumferential direction. Each rubber plate 57 is composed of a small piece, the base part of which is adhered and fixed to the rubber bag 2, and the tip part thereof is released and receives a water pressure action to stand up and is pressed against the wall surface of the pipe P. In this embodiment, the base portion of the front rubber plate 57a and the front end portion of the rear rubber plate 57b overlap each other, but they may be separated. Further, a mode of arrangement of one row or three rows can also be adopted.

The main air chamber 2A of the rubber bag 2 has a function of closing most of the cross section of the pipe P at the maximum volume, and the frame bar 21 arranged in the main air chamber 2A has the main air chamber 2A.
It has the function of displacing by expanding and contracting. Also,
In the present embodiment, the sub air chamber 2B has a maximum volume in close contact with the pipe P, and the volume is reduced to form a gap H with the pipe P. However, it is possible to adopt a mode in which the gap H is formed in advance with the maximum volume.

11 and 12 show another structure of the rubber bag. In this rubber bag 2-a, three air chambers 2A,
It consists of 2B and 2C. That is, the nuclear air chamber 2C is defined by the cylindrical diaphragm 59 arranged between the both end plates 42 in the main air chamber 2A. The nuclear air chamber 2C forms a part of the main air chamber 2A. The main air chamber 2A and the sub air chamber 2B are partitioned by the diaphragm 41. The end plate 42 has these air chambers 2
Aeration holes 47a, 47b, 47 interlocking with A, 2B, 2C
c is opened. The main air inlet 47a and the main air chamber 2
A is connected to A via a ventilation pipe 60, and the auxiliary air inlet 47b and the auxiliary air chamber 2B are connected to each other via a ventilation pipe 48. The air injection hole 47c is directly connected to the nuclear air chamber 2C. According to this rubber bag 2-a, since the nuclear air chamber 2C is provided, the nuclear air chamber 2C
By injecting compressed air into C first, the expansion operation of the rubber bag 2-a is performed more reliably.

(Assembly of Frame 1 and Rubber Bag 2) The above frame 1 and rubber bag 2 are assembled while maintaining a predetermined positional relationship. That is, the mounting end plate 10 of the frame 1
And the end plate 42 of the rubber bag 2 are placed relative to each other,
The screw rod 45 of the end plate 42 of the
Through the connecting hole 35, and the nut 46 is tightened and fixed to the screw rod 45. In addition, the air inlet 36 of the mounting end plate 10
And the air-injection hole 47 of the end plate 42 are attached to the corresponding holes 36a and 47a and 36b and 47b, respectively. Further, the frame bar 21 of the frame 1 is arranged so as to penetrate the sheath bag 55 of the rubber bag 2.

In addition, members and mechanisms attached to the movable stopper S will be briefly described. Tow rope 4 One end of the tow rope 4 is attached to the moving stopper S by the hoist ring 3
It is attached via 9, and the other end is guided to the ground part and interlocks with the traction adjusting mechanism part 5. In the disposition of the tow rope 4, an appropriate guide tool such as a pulley is arranged at the corner of the human hole Q1. Traction adjusting mechanism unit 5 The traction adjusting mechanism unit 5 is mainly composed of a so-called winch mechanism, and reels out and winds up the tow rope 4. The tension is also adjusted by the traction adjusting mechanism section 5. Rubber Tube 6 / Air Supply Device 7 The rubber tube 6 has one end connected to the rubber bag 2 and the other end connected to the air supply device 7. In this embodiment, two systems, a rubber tube for the main air chamber 2A and a rubber tube for the sub air chamber 2B, are used.
Further, in the rubber bag 2-a having the nuclear air chamber 2C, 3
Strains are used. The air supply device 7 is arranged above the ground,
Compressed air is generated and the magnitude of the air pressure is freely adjusted.

(Operation of the main cleaning moving plug S) The cleaning moving plug S of the sewer pipe of this embodiment operates as follows.
When air is not supplied to the rubber bag 2, the main air chamber 2A and the sub air chamber 2B are contracted, the frame bar 21 is contracted,
In response to this, the link arm 18 is also in a state of falling outward toward the pole seat portion 1A. Main air chamber 2A of rubber bag 2
When the compressed air is supplied to the main air chamber 2A, the main air chamber 2A expands, and accordingly, the frame bar 21 is displaced radially outward in a radially expanding manner. With this expansion displacement, the link arm 18 moves to the pin 1
Get up with 9 as the fulcrum. At this time, the link arm 1
The inner diameter end portion 18 a of 8 compresses the coil spring 14 via the spring seat fitting 13. Expansion of the main air chamber 2A is restricted by the diameter expansion restricting rope 51. The supply of air to the sub air chamber 2B is performed at the same time as or after the supply of air to the main air chamber 2A. When air is removed from the main air chamber 2A of the inflated rubber bag 2, the main air chamber 2A contracts and the frame bar 21
Is displaced radially toward the inside. In response to this, the link arm 18 receives the biasing force from the coil spring 14 and quickly falls in the closing direction. The outer diameter of the movable stopper S in the contracted state is determined to be large enough to pass through the opening of the human hole. In addition, the smooth closing operation can cope with sudden water discharge.

(Cleaning work) Next, the cleaning work inside the sewer pipe, which is carried out by using the moving plug S for cleaning the sewer pipe in this embodiment, will be explained. 13 shows the entire cleaning work, and FIGS. 14 and 15 show the cleaning operation. In the figure, P is a target sewer pipe, Q1 is an upstream manhole of the sewer pipe P, and Q2 is a downstream manhole. Sludge T is accumulated at the bottom of the sewer pipe P. Then, cleaning including the tow rope 4, the tow adjusting mechanism 5, the rubber pipe 6 and the air supply device 7 mainly in the moving plug S of the present embodiment over the upstream side human hole Q1 in the sewer pipe P. Facilities are arranged. In the following description, the front side means the downstream side, and the rear side means the upstream side.

The following is a description based on the work procedure. (1) The traction adjusting mechanism section 5 and the air supply device 7 are installed on the ground, and first, the air supply device 7 and the main moving plug S are connected by the rubber tube 6.

(2) The moving plug S is carried in through the human hole Q1 on the upstream side of the sewer pipe P to be cleaned. That is, the movable stopper S freely passes through the opening of the human hole Q1 in the contracted state and is carried into the human hole Q1. The moving plug S and the traction adjusting mechanism section 5 arranged on the ground are connected via the traction rope 4.

(3) Compressed air is supplied from the air supply device 7 to the main air chamber 2A of the rubber bag 2, the frame 1 is expanded outward, and its wheels 29 are pressed against the pipe wall of the sewer pipe P. .
At this time, since the wheels 29 of the frame 1 at both lower ends have a roundness and are allowed to slip, this expanding operation is performed smoothly. Furthermore, compressed air is supplied to the sub air chamber 2B of the rubber bag 2 to expand the sub air chamber 2B to an appropriate size.

(4) When the flowing water flowing down the sewer pipe P maintains a sufficient water level, in other words, when the amount of flowing water is large, the moving water is suddenly stopped by the moving plug S, and the moving plug is It flows out as a discharge flow from the cross-sectional reduction part H below the rubber bag 2 of S. By this discharge flow, the deposit T at the bottom of the sewer pipe P is swept out downstream.

(5) While the tension is adjusted by the operation of the traction adjusting mechanism 5, the tow rope 4 is unrolled and the moving plug S is moved to the downstream side. With this movement, the deposit T in the sewer pipe P is washed away to the downstream side. At this time, the wheels 29 of the frame 1 prevent lateral displacement and stably guide this movement. Furthermore, since the rubber bag 2 receives water pressure on its rear surface and a discharge flow having a high flow velocity is generated on its bottom surface, it receives a large force and vibration, but this force and vibration force are transmitted to the frame 1. As a result, the frame 1 counters these forces by virtue of its complementary stiffness.

(6) When the cleaning is completed, the air in the main / sub air chambers 2A and 2B of the rubber bag 2 is evacuated and the rubber bag 2 is contracted.
Secure running water cross section. Then, the pulling rope 4 is wound up by the pulling adjustment mechanism unit 5, the moving plug S is pulled back to the original upstream human hole Q1, and these members are collected.

(7) While the work is in progress, when the water level rises due to sudden water discharge, that is, when it is necessary to quickly flush the downstream side, the main and sub air chambers of the rubber bag 2 of the main moving plug S The air in 2A and 2B is evacuated, the running water cross section is secured, and the water discharge is treated. When the water level of the running water in the sewer pipe P is low, or when the amount of the running water is small, the rubber bag 2 for closing the entire cross section is used as follows. Inflating the rubber bag 2 and pressing the lower surface of the rubber bag 2 against the bottom surface of the sewer pipe P,
The sewer pipe P is closed to stop running water, and the water level on the upstream side is raised to store water. The rubber plate 57 at the center of the rubber bag 2 is pressed against the wall surface of the pipe P by being subjected to the water pressure effect, and has a watertight effect. When a sufficient amount of stored water is obtained, the sub air chamber 2B of the rubber bag 2 is contracted, a running water cross section is secured between the lower surface of the rubber bag 2 and the pipe bottom of the sewer pipe P, and the discharge flow flowing out of this running water cross section is secured. To clean the sludge. When the rise of the water level is small, a means for closing the inflow portion of the human hole Q1 on the upstream side and then pouring water into the human hole Q1 to increase the water flow is also adopted.

According to the moving plug S of this embodiment described above, the following effects are exhibited. The moving plug S is composed of a frame 1 and a rubber bag 2.
Since they are assembled as one body and can be expanded, they can be easily carried into the human hole and the sewer pipe P from the opening of the human hole Q in the contracted state. Since the frame 1 is expanded by the rubber bag 2, it easily fits the inner diameter of the sewer pipe P. By adjusting the expansion and contraction of the rubber bag 2, the flow-down cross-sectional area can be adjusted freely, and thus the cleaning force can be changed. In addition to the above effects, since the integrity of the frame 1 and the rubber bag 2 is increased, a large gripping force with respect to the rubber bag 2 can be obtained, and therefore a large water pressure can be countered, and a pipe with a large diameter and a large flow rate can be obtained. Can be applied. Further, by the operation of the link arm 18, the expansion / contraction operation of the movable stopper is smoothly performed synchronously and regularly, and the work efficiency is achieved.

The link arm 18 has a base end portion 18 on the inner side thereof.
Since the coil spring 14 constantly receives the biasing force at a, the contraction operation of the frame 1 accompanying the contraction of the rubber bag 2 is promoted and the frame 1 is quickly performed. Since the rubber bag 2 is divided into a main air chamber 2A that expands the frame 1 and a sub air chamber 2B that generates a discharge flow, the functional division is clear. Further, the discharge flow rate can be adjusted by adjusting the outflow amount of the compressed air to the sub air chamber 2B.

The present invention is not limited to the above embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included in the technical scope of the present invention. In the link mechanism of the frame 1, in the present embodiment, a bent portion 18a is provided at the base of the link arm 18 and the bent portion 1a is provided.
Although 8 is brought into contact with the coil spring 14, the bent portion 18a is abolished and the base portion of the link arm 18 is pivotally attached by the pin 19. In this case, the spring seat fitting 13, the coil spring 14, and the nut assembly 15
It is natural that the etc. are abolished. In this aspect,
The contraction of the frame 1 depends on the removal of the working gas from the rubber bag 2. In the configuration of the rubber bag 2, the sub air chamber 2B may be eliminated and only the main air chamber 2A may be provided. In this case, the nuclear air chamber 2
Provision of C is free. The movable stopper S of this embodiment has a front-rear symmetrical structure, but the front or downstream hoist ring 39 may be omitted. Further, the guide frame 31 may be omitted.

C. EFFECTS OF THE INVENTION According to the moving plug for cleaning the sewer pipe of the present invention, the moving plug can be expanded and contracted freely as the rubber bag expands and contracts, and the person can easily open the human hole through the opening. It can be carried into the hole and the sewer pipe and can be easily adapted to the inner diameter of the sewer pipe. Further, since the integrity of the frame and the rubber bag is increased, a large gripping force with respect to the rubber bag can be obtained, and therefore a large water pressure can be counteracted, and application to a pipe with a large diameter and a large flow rate can be achieved. Further, by the operation of the link arm, the expansion / contraction operation of the movable stopper is smoothly performed synchronously and regularly, and the work efficiency is achieved.

[Brief description of drawings]

FIG. 1 is a side view showing an overall configuration of an embodiment of a moving plug for cleaning a sewer pipe of the present invention (a line II development view in FIG. 2).

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a side view showing the frame of the movable plug according to the present embodiment in an expanded diameter state.

FIG. 4 is a side view of the same frame in a reduced diameter state.

FIG. 5 is an enlarged view of part V of FIG.

FIG. 6 is a view as seen from the direction of arrow VI in FIG.

FIG. 7 is a side view of a rubber bag that constitutes the movable stopper according to the present embodiment.

FIG. 8 is an enlarged cross-sectional view of the rubber bag (cross-sectional view taken along line 8-8 of FIG. 9).

9 is a view taken in the direction of arrow IX in FIG.

FIG. 10 is a partially enlarged view of FIG.

FIG. 11 is a cross-sectional view showing another structure of the rubber bag (1 in FIG. 12).
1-11 sectional view).

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

FIG. 13 is a schematic cross-sectional view showing the procedure of a sewer pipe cleaning operation performed using the present moving stopper.

FIG. 14 is a diagram showing one step of cleaning work.

FIG. 15 is a diagram showing another step of the cleaning work.

[Explanation of symbols]

P ... Sewer pipe, T ... Deposit, S ... Moving plug, 1 ... Frame, 1A ... Polar seat, 1B ... Expansion / contraction part, 2 ... Rubber bag, 2A
… Main air chamber, 2B… Sub air chamber, 1C… Nuclear air chamber, 10…
Mounting end plate, 11 ... Shaft rod, 14 ... Coil spring, 18 ... Link arm, 21 ... Frame bar

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiki Akimoto 7-7 Ushizawa-cho, Iruma City, Saitama Prefecture (72) Inventor Hamao Yamashiro 213-10 Sasai, Sayama City, Saitama Prefecture Sayama Green Heights 5-402 (56) Reference Documents JP-A-7-268948 (JP, A) JP-A-5-247994 (JP, A) JP-A-2-74735 (JP, A) JP-A-5-214762 (JP, A) Actual development Sho-60- 86487 (JP, U) Actual development Sho 62-55796 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E03F 9/00 E03B 7/09 B08B 9/02-9/04

Claims (4)

(57) [Claims] 1. Inserted into a sewer pipe where water flows down,
A device for cleaning sludge accumulated on the bottom of a sewer pipe, which comprises two polar seats 1A arranged to face each other along the axis, and two polar seats arranged radially from the polar seat 1A. A plurality of frames 1 that are arranged across the pole seats 1A and that include a telescopic part 1B that can expand and contract in the radial direction with a link mechanism.
And a rubber bag 2 which is held in the frame 1, is hollow and has a substantially cylindrical shape, and is expandable / contractible by a working gas enclosed therein. The frame 1 includes an elastic portion 1B. One end of the constituting link arm 18 is pin-held by the pole seat portion 1A, and the other end of the link arm 18 is pin-held at both ends of the frame bar 21 straddling between the pole seat portions 1A.
The rubber bag 2 is attached to the frame 1 at both end surfaces of its cylindrical portion.
And a movable plug body for cleaning a sewer pipe, which is fixed to the pole seat portion 1A and is held by the frame bar 21 of the expandable portion 1B of the frame 1 in a penetrating manner. 2. A pole seat portion 1A is a mounting end plate 10 which is arranged orthogonally to the axis and on which a rib 12 for holding a pin of a link arm 18 is fixedly mounted, and which is planted in the central portion of the mounting end plate 10. A shaft rod 11 arranged along the shaft center, and a coil spring 14 fitted to the shaft rod 11 and having one end fixed to the shaft rod 11.
The movable plug body for cleaning a sewer pipe according to claim 1, wherein an end portion of the link arm 18 of the expandable portion 1B abuts on the other end of the coil spring 14. 3. The rubber bag 2 comprises a main air chamber 2A and a sub air chamber 2B, and the main air chamber 2A holds a frame bar 21,
The moving plug for cleaning a sewer pipe according to claim 1, wherein the sub air chamber 2B is arranged on the bottom side of the pipe. 4. A sewer pipe cleaning system according to claim 3, wherein the main air chamber 2A is provided with a right-cylindrical nuclear air chamber 1C arranged between the pole seats 1A. Moving plug.