JP2862680B2 - Copy mechanism of bellows cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying mechanism of a bellows cleaning apparatus, and more particularly to a bellows cleaning apparatus which cleans a bellows while following the center of the groove when the inner surface is narrow. .

[0002]

2. Description of the Related Art In a pipe used in a nuclear power generation facility or in a connection point of various pipes such as a thermal power plant or a chemical plant, a large pipe in a length direction of the pipe is absorbed so as to absorb a large thermal displacement of the pipe. When it is necessary to allow the amount of expansion and contraction, a molded bellows or a welded bellows is used in the joint portion of the pipe.

FIGS. 15 and 16 show an example of a mounting structure of a bellows disposed in a vent pipe in a suppression chamber of a boiling water reactor.

[0004] The tip of a vent pipe B attached to the outside of the containment vessel A penetrates the suppression chamber C, and inside the pool water of the suppression chamber C via a vent header D and a downcomer E. Around the vent pipe B, a vent nozzle G surrounding the vent pipe B with an annular gap F therebetween is attached to the wall of the suppression chamber C. The annular gap F between the vent pipe B and the vent nozzle G is The bellows H is communicated with the inside of the suppression chamber C, and is isolated from the outside air by disposing the bellows H on the opposite side.

As shown in FIG. 16, the bellows H is attached to the vent pipe B via an end plate I and an attachment sleeve J, with an intermediate sleeve K and an attachment flange L interposed therebetween. The guard pipe M for protection is arranged on the outside.

On the other hand, the bellows H is formed with a bellows groove X serving as a concave portion based on the provision of corrugated irregularities on the inner surface, and dust and the like are deposited on a portion below the bellows groove X. It has an easy structure. Therefore, factors such as the accumulation of dust during the construction of the reactor, the diffusion of radioactive materials after the start of operation of the reactor, and the condensation of water vapor generated by the pool water in the suppression chamber are superimposed. It is conceivable that they adhere to the groove X.

For this reason, in the bellows H used for nuclear power generation facilities, if the amount of dust adhering to the bellows groove X is large, when a worker enters the containment vessel or the suppression chamber during a periodic inspection or the like. In addition, the radiation exposure dose increases, and the workability during periodic inspections and the like deteriorates.
It is necessary to perform a cleaning operation for removing dust and the like prior to various operations inside the device.

[0008]

The work for cleaning the inner surface of the bellows H is extremely impaired because the annular gap F between the vent pipe B and the bellows H is a narrow portion. In the bellows H shown in FIGS. 15 and 16, for example, when the outer diameter of the vent pipe B is 1464 mm to 2075 mm and the inner diameter of the vent nozzle G is 1564 mm to 2175 mm, the gap between the vent pipe B and the vent nozzle G is about 50 mm. And
Further, the depth dimension from the opening of the vent nozzle G to the end plate I is, for example, about 1550 mm in a short part and about 2350 mm in a long part.

For this reason, inside the suppression chamber C, for example, a scaffolding device (scaffolding device) for a suppression chamber of a nuclear reactor proposed in Japanese Patent Application Laid-Open No. 61-265168.
Even if N is installed and a working scaffold is secured,
It is difficult to manually clean the bellows groove X of the bellows H, which is the narrowed portion, by hand. Further, a mechanical device for cleaning the inner surface of the bellows groove X located in the annular gap F has not been developed yet.

The present invention is to effectively solve such a problem. That is, the object of the present invention is to enable cleaning of the bellows groove in a narrow portion, to perform cleaning while following the center of the bellows groove, to improve remote controllability, and the like.

[0011]

In order to solve such a problem, two means have been proposed.

The first means includes a moving frame inserted into a cleaning operation position inside the bellows in the narrow portion, a brush swing driving source mounted on the moving frame, and a brush swing driving source connected to the brush swing driving source. A swinging power transmission sleeve that is rotated and rotated, a brush support arm that is supported by the swinging power transmission sleeve via a slide portion so as to be movable in an axial direction thereof, a rotary cleaning brush attached to the brush support arm, A brush rotation drive source connected to the rotary cleaning brush for rotating the brush; and a centering roller attached to the tip of the brush support arm for centering the center of the bellows groove by contact with the concave portion of the bellows groove. This is a copying mechanism of the bellows cleaning device having the configuration.

A second means is that a brush rotation drive source is mounted on a moving frame, and a brush rotation shaft rotated by the brush rotation drive source is inserted into the swinging power transmission sleeve with its tip protruding. A configuration in which a rotating belt is stretched between a driving pulley at the end of the brush rotating shaft and a driven pulley of the rotary cleaning brush is a copying mechanism of a bellows cleaning device in which the first means is added.

[0014]

In the copying mechanism of the bellows cleaning device according to the first means, when the brush swing drive source is operated with the moving frame inserted into the narrow portion, the brush support arm pivots, The centering roller at the tip contacts the bellows groove,
The slide portion is displaced by the resistance of the contact portion, and the position is corrected so as to follow the center of the concave portion of the bellows groove. Then, by operating the brush rotation driving source, the concave portion of the bellows groove is cleaned by the rotary cleaning brush.

[0015] In the copying mechanism of the bellows cleaning device according to the second means, the concave portion is cleaned by copying the rotary cleaning brush to the center of the concave portion of the bellows. By rotating the brush with a rotating belt, the rotational force transmission system is given tolerance for deviation,
The centering range of the centering roller is increased.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A copying mechanism of a bellows cleaning apparatus according to the present invention will be described below with reference to FIGS.

FIG. 8 shows the entire bellows cleaning device as a vent pipe B.
2 shows a state in which it is incorporated between the nozzle and the vent nozzle G.

The bellows cleaning device is shown in FIGS.
As shown in FIG. 1, a swivel guide rail 1 attached to the outer peripheral surface of the vent pipe B, a swivel unit 2 attached to the swivel guide rail 1 so as to be able to swivel, a support frame 3 provided in the swivel unit 2, The frame 3 includes a moving frame 4 that is attached to the frame 3 so as to be movable in the axial direction of the vent pipe B, and a working unit 5 that is attached to the moving frame 4 to clean the inner surface of the bellows H. At a position apart from the annular gap F with the nozzle G, as shown in FIG.
A cleaning liquid supply device 6, a vacuum recovery device 7, a control means 8, and a monitoring means 9 are provided. The control means 8 includes a control device 8a and a power supply device 8b, and the monitoring means 9 includes a TV monitor 9a, a TV recorder 9b, and a recording device 9c.

As a supplementary explanation, the turning guide rail 1 is fixed to the outer periphery of the vent pipe B in a fitted state as shown in FIG. Then, as shown in FIGS. 13 and 14, for example, a rail piece in a 16-split state
1a, a pin joint 1b for connecting these rail pieces 1a to each other to form a ring, and fitting to the vent pipe B by adjusting the connection length of the plurality of rail pieces 1a to apply tension. And a turn buckle part 1c for causing the buckle to rotate.

As shown in FIG. 9, the revolving portion 2 has a ring-like and basket-like shape as a whole. That is, the turning portion 2 is provided with the support frame 3 shown in FIG.
, A turning drive frame 21, a dimension adjusting frame 22, and a connecting frame 23A.
23B are connected to each other by using a pin joint 2a or the like, so as to be annularly connected as shown in FIG.

As shown in FIGS. 11 and 12, the turning drive frame 21 is made of a frame material 2b made of aluminum or the like.
And a magnet wheel 2c that is disposed at, for example, four places of the frame member 2b and is rotatably and magnetically attached in the circumferential direction of the outer peripheral surface of the vent pipe B, and a turning drive source ( Turning motor) 2d, a rotating force transmitting means 2e composed of a chain and a sprocket for transmitting the rotating force of the rotating driving source 2d to the magnet wheel 2c, and a universal disposed in the middle of the rotating force transmitting means 2e. Joint
2f, a plurality of mounting brackets 2g disposed at the base of the frame member 2b, a turning guide roller 2h disposed on the mounting bracket 2g to guide the turning movement while holding the turning guide rail 1 from both sides, and a vent pipe. B has a turning position detecting roller 2i that is rotated in contact with the outer peripheral surface of the roller B, and a rotary encoder 2j that is connected to the turning position detecting roller 2i and rotated.

The dimension adjusting frame 22 is also made lighter by aluminum material or the like, and as shown in FIG. 9, a part thereof is connected to adjust the circumferential length of each frame to apply tension. , And fasteners, such as bolts and nuts, to be integrally attached to the connection frames 23A and 23B.

The connection frames 23A and 23B are also reduced in weight by using an aluminum material or the like, and, as shown in FIG. Linked by Further, as shown in FIG. 3, the connecting frame 23A and the connecting frame 23B are set to have different circumferential dimensions.

As shown in FIG. 10, the support frame 3 is made up of a guide frame 3a whose weight is reduced by an aluminum material or the like and whose longitudinal direction is set along the axial direction of the vent pipe B.
A plurality of guide rollers 3b arranged on both sides of the guide frame 3a for movably supporting the moving frame 4, a reciprocating drive source (reciprocating motor) 3c mounted on the guide frame 3a, and a longitudinal direction of the guide frame 3a. A reciprocating driving force transmitting means 3d such as a chain or a sprocket for connecting the reciprocating drive source 3c and the moving frame 4 to reciprocate the moving frame 4 disposed between both ends, and a reciprocating device connected to the reciprocating driving source 3c A rotary rotary encoder 3e for detecting the amount of movement, a reinforcing member 3f for reinforcing the turning direction of the guide frame 3a, and an outer peripheral surface of the vent pipe B disposed at a key point such as a tip of the guide frame 3a. A plurality of deflection preventing rollers 3g that move to assist the turning movement of the guide frame 3a and suppress the deflection of the guide frame 3a, a magnet wheel 2c mounted according to the turning frame 21 described above, and a turning drive source 2d. , Rotational force transmission means 2e, universal join And 2f, those having a mounting bracket 2g, and a turning guide rollers 2h.

The moving frame 4 is, as shown in FIGS. 7 and 10, a linear guide rail 4a supported movably in the axial direction of the vent pipe B over a plurality of guide rollers 3b of the supporting frame 3. And an operating piece 4b for contacting and operating the axial position limit switches 3h and 3i arranged at a distance from the support frame 3, and as shown in FIG. In the state.

As shown in FIG. 7, the working section 5 comprises a cleaning means 51 mounted on the moving frame 4, a copying mechanism 52 forming a part of the cleaning means 51, and an inspection means 53.

The cleaning means 51 and the copying mechanism 52 are mounted on the moving frame 4 to generate a rotational force.
(DC motor) 5a, a brush torque transmitting system 5b such as a sprocket chain for transmitting the torque of the brush rotational driving source 5a, a brush rotating shaft 5c connected to the brush torque transmitting system 5b, A swinging power transmission sleeve 5d rotatably supporting the brush rotating shaft 5c and supported by the moving frame 4 so as to be rotatable and axially movable, and a sliding portion 5e disposed on the swinging power transmission sleeve 5d. 1, a brush support arm 5f supported by the slide portion 5e, a rotary cleaning brush 5g rotatably attached to the tip of the brush support arm 5f, and a drive attached to the tip of the brush rotation shaft 5c as shown in FIG. pulley
5h, a driven pulley 5i attached to the portion of the rotary cleaning brush 5g, a rotation belt 5j wound between the two pulleys 5h and 5i, and a roller pivotally attached to the tip of the brush support arm 5f. A support arm 5k, a centering roller 5m rotatably mounted on the roller support arm 5k to conform to the center of the concave portion of the bellows groove X, and a roller support arm 5k near an extension of the brush support arm 5f. A resilient member 5n such as a torsion spring shown in FIG. 2 for applying a resilient force to return, a brush swing drive source 5p mounted on the moving frame 4 shown in FIG. Oscillating power transmission belt 5q wound around oscillating power transmission sleeve 5d
And

Further, the cleaning means 51 and the copying mechanism 52 include
As shown in FIG. 7, an operating arm 5r integrated with the oscillating power transmission sleeve 5d, and an oscillating position limit switch 5s for detecting the oscillating limit of the operable arm 5r are arranged. As shown in FIGS. 1, 3 and 4, a slide rail 5t is provided integrally and in parallel with the swinging power transmission sleeve 5d, and a brush support arm 5f slidably supported by the slide rail 5t. The slide block 5u to be mounted and the slide position sensors 5v and 5w for detecting the movement of the slide block 5u in the longitudinal direction of the slide rail 5t.
Is a structure having

Therefore, the copying mechanism 52 includes a brush swing drive source 5p, a swing power transmission sleeve 5d, a slide portion 5e, a brush support arm 5f, a rotary cleaning brush 5g, and a brush rotation drive source mounted on the moving frame 4. 5a, the centering roller 5m and the like are concerned with the rotation, the turning movement, and the movement in the axial direction.

Also, as shown in FIG.
In the vicinity of 5g, a cleaning liquid injection nozzle 6a connected to the cleaning liquid supply device 6 shown in FIG. 8, a suction pipe swing source 7a mounted on the moving frame 4, and a vacuum recovery device 7 shown in FIG. A suction pipe 7b and a suction nozzle 7c are disposed.

On the other hand, the inspection means 53 is connected to a TV monitor 9a or the like in the monitoring means 9 shown in FIG. 8, and as shown in FIG. 7, a TV camera 9d serving as an image pickup unit and a head attached to the tip of the TV camera 9d. A prism portion 9e that is swingably attached, a camera swinging motor 9f disposed near the prism portion 9e, and a bism that connects the camera swinging motor 9f and the prism portion 9e to set the orientation of the prism portion. And a swing power transmission system 9g.

The rotary cleaning brush 5g is made of, for example, fine stainless steel bristles that are soft enough not to damage the bellows H.

Prior to the bellows cleaning operation of the bellows groove X by the operation of the working portion 5, the bellows cleaning device having such a structure, as shown in FIG.
And a vent nozzle G in the annular gap F.

When the turning guide rail 1 is mounted on the outer peripheral surface of the vent pipe B shown in FIG. 8, the whole is made annular by connecting a plurality of rail pieces 1a with each other by a pin joint 1b, and the turnbuckle 1c is operated. Thus, a tension is generated, and the turning guide rail 1 is attached to the outer circumference of the vent pipe B in a fastened state.

After the swivel guide rail 1 is attached, a part of the swivel part 2 divided into a plurality of parts, particularly a part of the support frame 3 having the largest weight is inserted into the upper part of the annular gap F, and the vent pipe is inserted. B is placed on the upper surface to support the load.

The supporting frame 3 is provided with a moving frame 4 and a working unit 5 as required. In this case, the magnet frame 2c is magnetically attached to the surface of the vent pipe B, so that the support frame 3 is supported, and the fall of the position of the support frame 3 when the position of the support frame 3 is shifted from the vertical line of the center of gravity is achieved.

The position of the support frame 3 is set by engaging a plurality of turning guide rollers 2h with the turning guide rail 1. By this position setting, the support frame 3, which is a part of the swivel unit 2, is in a state where it can be swiveled.

As shown in FIG. 9, a connection frame 23A, a dimension adjustment frame 22, a connection frame 23A, and a rotation drive frame 21 are provided next to the support frame 3 in a state engaged with the rotation guide rail 1 in the circumferential direction. , The connecting frame 23B and the like are added to each other using the pin joint portion 2a, a fastener, or the like, and the entire frame is formed in a cage shape by sequentially connecting the frames.

At the time of these connections, the turning position is adjusted so that the center of gravity of the connected portion is directly above the vent pipe B, and when the next frame is added, the center of gravity of the frame of the connected portion becomes the center of the vent pipe B. Repeatedly adjust the turning position to be on top,
The entire frames are connected in a cage shape.

After connecting the entire frame in a cage shape, the dimension adjustment frame
The circumferential tension is generated by operating the turnbuckle section 22 and the like, and in addition to the magnetic attachment of the magnet wheel 2c, the connecting frame 23
The rotation roller 2r and the deflection preventing roller 3g of the A.23B are tightly brought into contact with the outer peripheral surface of the vent pipe B, so that they can be rolled.

By these assembling, the turning part 2 is
All the turning guide rollers 2h are engaged with the turning guide rail 1 so that the turning position of the turning portion 2 can be freely changed.

On the other hand, when the movable frame 4 is mounted on the support frame 3, the linear guide rail 4a is engaged with and guided by the plurality of guide rollers 3b, and is movable in the longitudinal direction of the support frame 3. Becomes

The revolving part 2 and the moving frame 4 are shown in FIG.
As shown in (1), when the thickness of the annular gap F is, for example, 50 mm and the thickness of the annular gap F is, for example, 50 mm, the thickness is set to, for example, about 30 mm so that the annular gap F can freely move therethrough. In this case, the working unit 5 and the like are also set to be within the thickness range.

The cleaning operation of the bellows groove X of the bellows H will be described below. As shown in FIG.
When the support frame 3 is inserted into the annular gap F between the support frame 3 and the vent nozzle G, the turning position of the working unit 5 of the support frame 3 is set by the operation of each of the turning drive sources 2d of the turning unit 2, and By operating the reciprocating drive source 3c, the working unit 5 is extended to a desired working position, and the axial position of the vent pipe B is set.

When moving in the turning direction, the turning section 2 and the support frame 3 have a plurality of turning drive sources 2d, and a difference in the number of rotations at the time of simultaneous operation occurs. By doing so, the torque can be matched to achieve a smooth rotation state, and the turning movement of the turning portion 2 can be performed without any trouble.

Next, by operating the working unit 5 at these desired positions, the cleaning operation of the bellows groove X of the bellows H is started.

By operating the TV camera 9d and the camera swinging motor 9f of the inspection device 53 shown in FIG. 7, the prism portion 9e is directed toward the bellows groove X to observe the state of accumulation of dust and the like. The cleaning liquid is sprayed from the cleaning liquid injection nozzle 6a to perform pretreatment such as softening dust.

As shown by the chain line in FIG. 6 and FIG. 7, the working part 5 is inserted into the annular gap F while the brush support arm 5f is retracted so as to be within the thickness range of the moving frame 4. After that, by operating the brush swing drive source 5p, the brush support arm 5f swings and swings toward the bellows groove X as shown by the solid line in FIGS. Insert inside.

Centering roller at the tip of the brush support arm 5f
When 5m comes into contact with the bellows groove X, the resistance in the inserting and turning direction exceeds the elastic force of the elastic member 5n, and the roller support arm 5k is bent as shown in FIG.

[0050] Thus, the range of the contact position P ₁ to the contact position P ₂ in FIG. 5, the rotary cleaning brush 5g and centering roller 5m holds the state of contact at the same time the bellows groove X.

In these cases, if the centering roller 5m is displaced from the center of the bellows groove X, the centering roller 5m contacts the inclined portion of the U-shaped bellows groove X shown in FIG. Based on this, a copying operation for returning the centering roller 5m to the center of the bellows groove X occurs.

That is, the brush supporting arm 5f is
When the centering roller 5m is in a one-sided contact state by being movably attached to the swing transmission sleeve 5d with the interposition of 5e, the direction in which the contact pressure decreases becomes the center of the bellows groove X. Rotated cleaning brush returned to the direction
The cleaning position where 5 g is positioned at the center of the bellows groove X is automatically set.

When the cleaning position is set in accordance with the bellows groove X, when the displacement of the slide portion 5e is large and the slide position sensors 5v and 5w are activated, the moving frame 4 is moved in the axial direction of the vent pipe B. Then, correct the cleaning position.

Similarly, the change of the cleaning position is performed by moving the moving frame 4.

In the set cleaning position, the brush rotation drive source 5a is operated to transfer the torque to the torque transmitting system.
5b, the brush rotating shaft 5c, and the rotating belt 5j are transmitted to the rotating brush 5g, and the rotating brush 5g is rotated to clean the bellows groove X.

Then, the vacuum recovery device 7 shown in FIG. 8 is operated and the suction tube swing source 7a is operated so that the tip of the suction nozzle 7c shown in FIG. Dust and the like separated from the surface of the bellows groove X by 5 g are suctioned by the suction nozzle 7c and removed from the inside of the bellows groove X.

The bellows cleaning device is usually operated by remote control by utilizing the monitoring means 9 shown in FIG. 8, and the working unit 5 is inserted into the annular gap F, which is a narrow portion, so that the desired portion is removed. Can be cleaned freely.

[0058]

According to the first invention, ie, the copying mechanism of the bellows cleaning device according to the first aspect, the following effects are obtained. (1) A working part for cleaning the bellows groove is mounted on a support frame inserted into the annular gap, which is a narrow part,
Since the rotary cleaning brush of the working unit is swung by the brush support arm, the cleaning can be efficiently performed by feeding the rotary cleaning brush into the bellows groove. (2) When the centering roller attached to the tip of the brush support arm comes into contact with the bellows groove, the slide portion arranged between the swinging power transmission sleeve and the brush support arm allows displacement and rotates. Since the cleaning brush is positioned at the center of the bellows groove according to the shape of the bellows groove, the cleaning position can be easily set and the bellows groove can be reliably cleaned. According to the second invention, that is, according to the copying mechanism of the bellows cleaning device of the second aspect, the first
In addition to the effects of the present invention, the following effects can be obtained. (1) A rotating belt is stretched between the driving pulley at the end of the brush rotating shaft and the driven pulley of the brush supporting arm to transmit the rotating force, so that the sliding portion is not displaced. In addition, the centering of the rotary cleaning brush can be performed smoothly. (2) Since the center of rotation of the brush support arm and the center of rotation of the drive pulley coincide with each other, the swing of the brush support arm and the rotation of the rotary cleaning brush do not interfere with each other, and Cleaning workability can be improved.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view showing an embodiment of a copying mechanism of a bellows cleaning device according to the present invention.

FIG. 2 is a left side view showing one embodiment of a copying mechanism of the bellows cleaning device according to the present invention.

FIG. 3 is a plan view of the copying mechanism shown in FIG.

FIG. 4 is a view taken in the direction of arrows D-D in FIG. 3;

5 is a side view showing a state of contact between a centering roller and a bellows groove when the brush support arm shown in FIG. 2 swings.

FIG. 6 is a side view showing a swing swing state of the brush support arm shown in FIG. 2;

FIG. 7 is a front view showing an example of a moving frame on which the copying mechanism of the bellows cleaning device according to the present invention is mounted.

FIG. 8 is a partially cutaway perspective view showing a state in which the bellows cleaning device has been incorporated into a portion to be cleaned.

FIG. 9 is a side view showing one embodiment of a turning portion in the bellows cleaning device shown in FIG. 8;

10 is a front view showing a support frame and a moving frame in the bellows cleaning device shown in FIG.

11 is a front view showing an example of a turning drive frame portion in the bellows cleaning device shown in FIG.

12 is a bottom view showing an example of a turning drive frame portion in the bellows cleaning device shown in FIG. 8;

13 is a side view showing an example of a turning guide rail portion in the bellows cleaning device shown in FIG.

14 is a bottom view showing an example of a turning guide rail portion in the bellows cleaning device shown in FIG. 8;

FIG. 15 is a partially sectional front view showing an example of a mounting structure of a bellows arranged in a suppression chamber of a boiling water reactor.

16 is an enlarged view of a portion indicated by a chain line P in FIG.

[Description of Signs] B Vent pipe F Annular gap G Vent nozzle H Bellows X Bellows groove 1 Swing guide rail 2 Swivel unit 3 Support frame 4 Moving frame 5 Working unit 6 Cleaning liquid supply device 7 Vacuum recovery device 8 Control means 9 Monitoring means 51 Cleaning means 52 Copying mechanism 53 Inspection means 5a Brush rotation drive source (DC motor) 5b Rotary force transmission system 5c Brush rotation shaft 5d Swing power transmission sleeve 5e Slide section 5f Brush support arm 5g Rotary cleaning brush 5h Drive pulley 5i Rotary pulley 5j Rotating belt 5k Roller support arm 5m Centering roller 5n Resilient member 5p Brush swing drive source 5q Swing power transmission belt 5s Swing position limit switch 5t Slide rail 5u Slide block 5v / 5w slide position sensor

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyosuke Hozumi 1-9-4 Fukuura, Kanazawa-ku, Yokohama-shi, Kanagawa Prefecture Ishikawajima Inspection & Measurement Co., Ltd. Yokohama No.2 Office (72) Inventor Shuji Miyahara Isogo-ku, Yokohama-shi, Kanagawa No. 1, Shin-Nakahara-cho, Ishikawajima-Harima Heavy Industries, Ltd., Yokohama No. 1 Factory (72) Inventor Toshio Uehara, No. 1, Shin-Nakahara-cho, Isogo-ku, Yokohama, Kanagawa, Japan Hei 2-129898 (JP, U) Heisei 2-129899 (JP, U) Heisei 3-83690 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B08B 9 / 02 G21F 9/28 541

Claims (2)

(57) [Claims] 1. A moving frame inserted into a cleaning operation position inside a bellows in a narrow portion, a brush swing driving source mounted on the moving frame, and a brush swing driving source connected to the brush swing driving source and rotated. A swinging power transmission sleeve, a brush support arm movably supported in the axial direction by a sliding portion on the swinging power transmission sleeve, a rotary cleaning brush attached to the brush support arm, and a rotary cleaning brush. A brush rotation drive source connected to rotate the brush rotation arm; and a centering roller attached to the tip of the brush support arm and centering the bellows groove at the center position by contact with the concave portion of the bellows groove. Bellows cleaning device copying mechanism. 2. A brush rotation drive source is mounted on a moving frame,
A brush rotation shaft rotated by a brush rotation drive source is inserted into the swinging power transmission sleeve with its tip protruding, and the drive pulley at the tip of the brush rotation shaft and the driven pulley of the rotary cleaning brush are connected to each other. 2. The copying mechanism according to claim 1, wherein a rotating belt is stretched between the belts.