JPH07239199A - Intermediate supporting device of feed screw in interior cleaning device for long size cylinder - Google Patents

Abstract

PURPOSE:To restrain the deflection of a feed screw in the operation of an interior cleaning device for long size cylinder. CONSTITUTION:A long size feed screw 5 into which a cleaning device 11 is screwed is inserted into a long size cylinder 1. Key ways 12a, 12b each extending to the central portion from each end of the screw 5 are formed on the outer periphery thereof. Supporting bearings 14a, 14b are slipped slidably onto the feed screw 5 so as to hold the device 11 therebetween. Keys 13a, 13b which are fitted into the key ways 14a, 14b are fixedly attached to the inner circumferential surface of the bearings 14a, 14b, respectively. When the cleaning device 11, to which the bearings 14a, 14b can be attracted by magnets 17a, 17b, is moved back and forth, the bearings 14a, 14b are allowed alternately to stay at the central portion of the screw 5 to support it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate support device for a feed screw in an internal cleaning device for a long cylinder for cleaning the entire inside of a long cylinder having a relatively small diameter.

[0002]

2. Description of the Related Art Conventionally, as a means for completely cleaning the inside of a long, small-diameter cylinder, one having a cleaning tool attached to the end of a long rod has been used. Then, the operator cleans the inside of the cylinder by pushing and pulling the rod along the longitudinal direction and reciprocatingly moving the cleaning tool after putting it in the cylinder.

However, the method of pushing and pulling the rod as described above has a problem that a great deal of labor is required, especially when it is used for cleaning the inside of a long cylinder having a small diameter.

Therefore, recently, as shown in an example in FIG.
A body frame 3 equipped with a clamp tool 2 for fixing the front end to one end of the elongated cylinder 1, and the body frame 3
A long feed screw (screw rod) 5 whose base end is rotatably supported via a connector 4, and a flexible shaft 6 at the base end of the connector 4 for reversibly driving the feed screw 5. A long cylinder 1 that rotatably supports the motor 8 connected through a speed reducer 7 and the tip of the feed screw 5.
Auxiliary frame 9 that can be set to the other end of the brush, and a brush 10 that can be pressed against the inner surface of the elongated cylinder 1.
Cleaning tool 11 provided on the outer peripheral portion and screwed onto the feed screw 5
By rotating the feed screw 5 in the forward and reverse directions by driving the motor 8, the brush 10 of the cleaning tool 11 is pressed against the inner surface of the elongated cylinder 1 to feed the cleaning tool 11 to the cleaning tool 11. An internal cleaning device for a long cylinder has been proposed, which is capable of automatically cleaning the inside of the long cylinder 1 by reciprocating along the feed screw 5 by relative rotation of the screw 5.

[0005]

However, in the case of the internal cleaning device for a long cylinder, when the cleaning tool 11 is moved to the end side of the long cylinder 1 along the feed screw 5, the feed screw 5 is in the middle thereof. Since the department will not be supported anywhere,
As indicated by the chain double-dashed line in FIG. 3, the feed screw 5 is largely bent due to its own weight, which causes a problem of contact with the inner surface of the elongated cylinder 1 and damage.

Therefore, according to the present invention, even if the cleaning tool is moved to the end side, the bending of the feed screw can be suppressed so that the inside of the long cylinder is not damaged by contact. It is intended to provide a support device.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a cleaning tool by inserting a feed screw screwed with a cleaning tool into a long cylinder and rotating the screw forward and backward. A reciprocating movement to clean the inside of the long cylinder, the key groove is provided in the outer peripheral portion of the feed screw in the long cylinder internal cleaning device, and the key grooves are spaced from both ends toward the central portion. In the area of each key groove on both ends of the feed screw, support bearings each having a key slidably fitted in the key groove are respectively mounted, and the support bearings are attached to the front and rear sides of the cleaning tool. The cleaning tool and the support bearings are arranged so as to be sandwiched by the magnet, and the cleaning tool and the support bearings are attracted by a magnet.

Further, the support bearing is a radial bearing in which an outer race is rotatably fitted to an inner race which is loosely fitted along a key groove of a feed screw so as to be movable only in the axial direction. It is advisable to adopt a configuration that can be adsorbed to the cleaning tool.

[0009]

When the cleaning tool is in the area of the key groove, the supporting bearing in that area is adsorbed, but when moving to the area of the key groove on the opposite side, the supporting bearing adsorbed in the cleaning tool is Since the sliding of the key is stopped at the central portion of the feed screw where the key groove disappears, the key is removed from the cleaning tool and left at that position. Therefore, when the cleaning tool is moved back and forth,
The support bearings on both sides are alternately located at the central portion of the feed screw, and the central portion of the feed screw is supported.

Further, the support bearing is a radial bearing,
By making the inner race of the radial bearing movable in the longitudinal direction along the key groove and allowing the outer race to be adsorbed to the cleaning tool, the support bearing can rotate the feed screw regardless of the position on the feed screw. Support without hindrance.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

1 (a) and (b) and FIG. 2 (a).
(B) shows an embodiment of the present invention. In an internal cleaning device for a long cylinder having the same configuration as shown in FIG. 3, the outer periphery of the feed screw 5 is extended from the tip end on the auxiliary frame 9 side. The key frame 12a is extended so as to extend to the central portion, and the main frame 3 is shifted by 180 ° from the key groove 12a.
The key grooves 12b are respectively provided so as to extend from the base end portion on the side to the central portion, and the key grooves 12a and 12b are
Keys 13a and 13b are slidably fitted respectively, and support bearings, which are radial bearings, are formed so that the cleaning tools 11 are paired in the areas of the key grooves 12a and 12b of the feed screw 5 at the front and rear sides. The inner race 15 of each of the support bearings 14a and 14b is mounted by loosening 14a and 14b.
The keys 13a and 13b are fixed to the inner peripheral surfaces of the a and 15b, and the keys 13a and 13b are fixed to the key groove 12 of the feed screw 5.
Within the area that slides along a, 12b, the support bearings 14a,
14b is allowed to move along the lead screw 5.

Further, ring-shaped magnets 17a and 17b are arranged on the surfaces of the support bearings 14a and 14b on the cleaning tool 11 side, and are attached to the outer races 16a and 16b of the support bearings 14a and 14b, respectively. Ring-shaped receiving plates 18a and 18b for attracting the magnets 17a and 17b are attached to the front and rear end surfaces of the cleaning tool 11,
Support bearings 14a and 14b can be attached to and detached from the front and rear end surfaces of the cleaning tool 11 via the magnets 17a and 17b, and the support is attracted to the rear end surface of the cleaning tool 11 as the cleaning tool 11 moves to the tip side of the feed screw. By locking the key 13b of the bearing 14b to the terminal end 19b of the key groove 12b, the support bearing 14b is left at the center of the feed screw 5 to support the feed screw 5, while the feed screw base of the cleaning tool 11 is supported. The support bearing 1 attracted to the front end face as the end bearing moves.
The key 13a of 4a is stopped at the terminal end 19a of the key groove 12a, so that the support bearing 14a is left in the central portion of the feed screw 5 so that the feed screw 5 can be supported.

In this embodiment, as the feed screw 5,
Since the addition type of the joint portion 5'is adopted, the inner race 15a of the support bearings 14a, 14b,
15b and the keys 13a and 13b are formed to have a length such that they can be smoothly moved across the joint portion 5 '. Further, the cleaning tool 11 is attached to the outer periphery of the nut 20 screwed to the feed screw 5,
The brush 10 held by the brush holder 21 is attached.

In order to clean the inside of the elongated cylinder 1, the feed screw 5 is rotated in the forward and reverse directions to reciprocate the cleaning tool 11, so that the support bearings 14a and 14b are alternately positioned at the center of the feed screw 5. Since the feed screw 5 is supported at its central portion, it is possible to suppress large bending due to its own weight.

More specifically, when the cleaning tool 11 is located on the base end side of the feed screw 5 as shown by the chain double-dashed line in FIG. 2 (a), the support bearing 14b is adsorbed to the rear end surface of the feed screw 5. In this state, when the motor 8 is driven in the required direction, the cleaning tool 11 and the support bearing 14b are moved integrally along the feed screw 5 toward the tip side. At this time, since the outer race 16b of the support bearing 14b is attracted to the receiving plate 18b of the cleaning tool 11 by the magnet 17b attached to the outer race 16b, the moving force in the longitudinal direction (axial direction) along the feed screw 5 is increased. Only the inner race 15b receives the key 13b fixed to the inner peripheral portion of the keyway 12.
Since it is slidably fitted in b, it receives a rotational force as well as a moving force in the longitudinal direction. When the cleaning tool 11 approaches the central portion of the feed screw 5, the key 13b sliding in the key groove 12b abuts against the terminal end 19b of the key groove 12b, and the sliding beyond that is stopped. However, since the feeding operation of the cleaning tool 11 is continued, the support bearing 14
b is removed from the cleaning tool 11 and left at that position, and the cleaning tool 11 is further moved toward the tip side.

On the other hand, in the support bearing 14a which makes a pair with the support bearing 14b, the key 13a is the end 19a of the key groove 12a.
It is already in the state of being located in the center of the feed screw 5, which is the point where the support bearing 14a abuts on the support screw 14a, and therefore the support bearing 14a is pushed by the moving cleaning tool 11.
At this time, the magnet 17a of the support bearing 14a is attracted to the receiving plate 18a on the front end surface of the cleaning tool 11, so that the cleaning tool 11 is integrated with the support bearing 14a as shown by the solid line in FIG. Can be moved to the tip. As described above, when the cleaning tool 11 is moving integrally with the support bearing 14a from the central portion toward the tip portion, the support bearing 14b maintains the state left behind in the central portion of the feed screw 5. Since the feed screw 5 is supported by the lever, it is possible to prevent the feed screw 5 from being largely bent due to its own weight.

Next, when the cleaning tool 11 arrives at the tip of the feed screw 5 and the motor 8 is driven in the reverse direction, the cleaning tool 1
1 and the support bearing 14a are moved integrally along the feed screw 5 toward the base end side. As a result, as shown in FIG. 2B, the support bearing 14a is left in the center of the feed screw 5 in symmetry with the feed operation from the base end side to the tip end side as described above. , And the cleaning tool 11 is sent to the base end side integrally with the support bearing 14b.

As described above, when the cleaning tool 11 is reciprocally moved along the feed screw 5, one of the support bearings 14a and 14b is alternately left in the center portion when passing through the center portion of the feed screw 5. It can be in a closed state. Therefore,
Even if the cleaning tool 11 is located at the end portion, the central portion of the feed screw 5 is supported by either one of the support bearings 14a or 14b, and the feed screw 5 is largely bent, so It is possible to prevent contact scratches on the inner surface. Further, since the support bearings 14a, 14b are of a type in which the outer races 16a, 16b are adsorbed to the cleaning tool 11, even when the supporting races 14a, 14b move integrally with the cleaning tool 11, the feed screw 5 is fed without hindering the rotation. Intermediate support of the screw 5 can be provided.

In the above embodiment, the keyways 12a, 1a
Although 2b is provided at a position shifted in phase by 180 °, it may be provided at any position as long as the keyways 12a and 12b are not continuous in a straight line, and the support bearing 14
The relationship between the magnets 17a and 17b on the side of a and 14b and the receiving plates 18a and 18b on the side of the cleaning tool 11 may be reversed. Further, if the surface portion for attracting the magnets 17a and 17b is a magnetic body, Of course, the plates 18a and 18b may be unnecessary, and various modifications may be made without departing from the scope of the present invention.

[0021]

As described above, according to the intermediate support device for the feed screw in the internal cleaning device for a long cylinder of the present invention,
Two key grooves are provided on the feed screw so as to extend from the end to the center, and two support bearings are mounted on the feed screw through the key engaged with the key groove, and each support bearing is cleaned. Since the front and rear end surfaces of the tool can be attached and detached with a magnet,
As the cleaning tool reciprocates along the feed screw, one of the support bearings can alternately be disengaged from the cleaning tool and positioned in the center of the feed screw, which causes the cleaning tool to be positioned at the end. Also, the central part of the feed screw can be supported by one of the support bearings, and it is possible to prevent large deflection of the feed screw, and to prevent contact scratches inside the long cylinder due to the deflection of the feed screw. The support bearing is a radial bearing, the inner race can be moved only in the axial direction, and the outer race can be attached to and detached from the cleaning tool, so that the support bearing moves integrally with the cleaning tool. Even at this time, the excellent effect that the feed screw can be stably supported in the middle without hindering the rotation of the feed screw is exhibited.

[Brief description of drawings]

1 shows an embodiment of an intermediate support device for a feed screw in an internal cleaning device for a long cylinder of the present invention, (a) is a partially cut side view, and (b) is a support bearing. ) A-
FIG.

FIG. 2 is a diagram showing an operating state, in which (a) shows a state in which the cleaning tool is on the tip side of the feed screw, and (b) shows a state in which the cleaning tool is on the base end side of the feed screw. It is a figure.

FIG. 3 is a schematic view of a recently proposed internal cleaning device for a long cylinder.

[Explanation of symbols]

 1 Long cylinder 5 Feed screw 12a, 12b Key groove 13a, 13b Key 14a, 14b Support bearing 15a, 15b Inner race 16a, 16b Outer race 17a, 17b Magnet

Claims (2)

[Claims] 1. A feed screw having a cleaning tool screwed therein is inserted into a long cylinder and rotated in the forward and reverse directions to reciprocate the cleaning tool to clean the interior of the long cylinder. A key groove is provided on the outer peripheral portion of the feed screw in an internal cleaning device for a long cylinder so as to be spaced from both ends toward the central portion, and the key groove is provided in each key groove region on both end sides of the feed screw. Support bearings each having a key slidably fitted into the cleaning tool, and the support bearings are arranged on the front and rear sides of the cleaning tool so as to sandwich the cleaning tool. An intermediate support device for a feed screw in an internal cleaning device for a long cylinder, which has a structure in which a bearing and a magnet are attracted by a magnet. 2. A radial bearing in which an outer race is rotatably fitted to an inner race that is loosely fitted so that the support bearing can move only in the axial direction along a key groove of a feed screw. The intermediate support device for the feed screw in the internal cleaning device for a long cylinder according to claim 1, wherein the intermediate support device is capable of adsorbing to a cleaning tool.