JP6751809B2 - Duct cleaning equipment, duct cleaning equipment and duct cleaning system - Google Patents

Description

The present invention relates to a device for cleaning ducts used for exhaust or drainage.

Conventionally, various devices and appliances for cleaning the inside of a drainage duct and an exhaust duct have been proposed.

Among them, in recent years, a cleaning tool in which a metal buff is attached to the tip of a flexible shaft connected to a power source has been proposed in order to perform reliable cleaning according to various duct shapes.

Examples of the above-mentioned cleaning tool include those described in the following patent documents.

Japanese Unexamined Patent Publication No. 2018-118217

However, since the cleaning tool described in Patent Document 1 uses only a metal buff, it may cause a problem that the inner surface is unnecessarily scratched or unnecessarily scraped depending on the material of the piping. ..

The applicant is improving the cleaning equipment in order to improve the efficiency of such duct cleaning work.

In view of the above-mentioned problems, the present invention provides a duct cleaning device, a duct cleaning device, and a duct cleaning system that are suitable for pipes formed in various shapes and that can appropriately clean the inner surface of the pipe. The purpose is to improve the satisfaction of those who desire highly efficient cleaning technology.

According to the present invention, a driving source that applies a rotational driving force, a base end to which a driving force applied from the driving source is input, and an intermediate that can transmit the driving force input from the base end and have flexibility. A duct cleaning device having a portion and a flexible shaft having a tip capable of transmitting a driving force from an intermediate portion thereof to the outside, wherein the flexible shaft is covered with a flexible cover and the cover. It has a flexible core material, and the cover and the core material are configured such that the core material is rotatably and non-fixed in the cover about the longitudinal direction. have a contact cleaning element for removing contact contamination of the inner surface of the duct formed in the tubular by rotating operating interchangeably attached to the distal end of the flexible shaft, the driving source is given gradually increasing the rotational speed from the trigger The contact cleaning body has a rotation speed control mechanism capable of changing the rotation speed to a predetermined speed at which cleaning can be performed, and the contact cleaning body has a flexible shaft at the center of each of the cloth materials in which a plurality of cloth materials are stacked. The cloth material portion has a cloth material portion provided with a through hole through which the tip is inserted, and the cloth material portion is provided with a diameter sewing portion for sewing in a state where a plurality of the cloth materials are stacked, and the diameter sewing portion is provided. , The cloth material provided at a distance of 10% to 90% from the center in the radial distance from the center to the outer periphery of each cloth material, and the cloth material on the outer peripheral side thereof can be freely deformed in a non-fixed state. In addition, all layers of the cloth material portion are sewn together at a diameter of a predetermined ratio with respect to the inner diameter size of the duct, and the outer edges of the cloth material are separated from each other on the outside of the diameter sewing portion. It is a duct cleaning device having a cleaning edge portion that is in direct contact with the inner surface of the duct.

Here, the fibrous material is a concept that includes not only cloth materials and synthetic fibers but also materials such as urethane and sponge.

INDUSTRIAL APPLICABILITY According to the present invention, a duct cleaning device, a duct cleaning device, and a duct cleaning system that are suitable for pipes formed in various shapes and that can appropriately clean the inner surface of the pipes are provided, and a highly efficient cleaning technique can be provided. It is possible to improve the satisfaction of those who desire it.

The external view of the duct cleaning device which concerns on 1st Embodiment of this invention. External view of the flexible shaft. Explanatory drawing of the main part of the flexible shaft. Explanatory drawing of the main part of the layered cloth which concerns on the same Example. The operation explanatory diagram which concerns on the same Example. Explanatory drawing of the main part which concerns on the modification of the same Example. Partial longitudinal enlarged front view of the second embodiment. Enlarged front view with the fixture of the second embodiment removed. Explanatory view of attachment / detachment by the enlarged plan view of the 2nd Example. Partial longitudinal front view with the fixture of the third embodiment attached. Partial longitudinal front view with the fixture of the third embodiment removed.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of the duct cleaning system A and the suction device B.
The duct cleaning system A according to the present embodiment is for removing dirt in the duct D arranged mainly for the purpose of exhaust and drainage arranged in a house or a public facility.

The suction device B can suck dirt floating in the space inside the duct D by arranging a suction port near or inside the end D3 of the duct D. As the specific configuration of the suction device B, various devices such as an existing vacuum cleaner can be widely used, and therefore, a specific description in the present embodiment will be omitted.

The duct cleaning device 1 starts with a drive source 2 that applies a rotational driving force, an input / output end 33 that is a base end for inputting the driving force applied from the drive source 2 to the core material end portion 31a, and the input / output end 33. A flexible shaft 3 having a shaft body 30 which is an intermediate portion capable of transmitting an input driving force and having flexibility, and an input / output end 33 which is a tip capable of transmitting a driving force from the shaft body 30 to the outside, and flexible Mainly composed of a layered cloth 5 made of a fibrous material that is interchangeably attached to an input / output end 33 on the tip side of the shaft 3 and is formed by rotating to contact and remove dirt on the inner surface D1 of the duct D. It is characterized by having a contact cleaning body 4. Further, the duct cleaning tool 10 according to the present invention is characterized in that the flexible shaft 3 and the contact cleaning body 4 are provided.
Hereinafter, a specific configuration of the duct cleaning device 1 will be described.

As the drive source 2, in this embodiment, a tool such as an electric drill, which can apply a rotational driving force to the flexible shaft 3 on the output side, is applied. The drive source 2 includes a main body 20 that rotates a motor M, a crank, or the like by electricity, liquid fuel, or the like, and an output end 21 for transmitting a rotational driving force from the main body 20 to a flexible shaft 3 on the output side. Have. The output ends 21 are formed in a shape that can be connected to both ends of the flexible shaft 3, that is, core material end portions 31a or couplings 34 that protrude from each input / output end 33 described later.

Then, in the present embodiment, the drive source 2 has a speed adjustment mechanism 22 shown by a broken line in FIG. 1 capable of adjusting the rotation speed, that is, the rotation speed of the rotation driving force according to the angle at which the lever 2a is grasped and tilted. ing. Normally, the speed adjusting mechanism 22 is provided in the main body 20 in the form of a circuit board or the like in the vicinity of a driving element such as a motor M. Immediately after starting, the speed adjusting mechanism 22 applies a rotational driving force at a rotational speed that does not give an excessive load to each component, and gradually increases the rotational speed to remove dirt in the duct D. It is set to reach a sufficient number of revolutions.

FIG. 2 is a partially enlarged cross-sectional view showing a part of the intermediate portion of the flexible shaft 3 omitted.
The flexible shaft 3 is set so that it can be directly connected to the contact cleaning body 4, as shown in FIG. The flexible shaft 3 is configured separately from the shaft body 30, the input / output ends 33 provided at both ends of the shaft body 30, and the input / output ends 33, and is connected to the drive source 2 and the contact cleaning body 4. It has a coupling 34 for fixing the coupling 34 and a stopper 35 for fixing the coupling 34.

As shown in the cross section in FIG. 2, the shaft body 30 has, for example, a flexible cover 32 (flexible tube) formed in the shape of a resin pipe and a rotation axis in the longitudinal direction in the cover 32. It has a core material 31 (inner shaft) configured to be able to rotate, for example, to transmit the rotation. The core material 31 is mainly composed of, for example, a wire material tied in a bundle, and the core material end portion of the input / output end 33 so that both ends of the wire material can reliably transmit a rotational driving force. It is connected to 31a.

Then, in this embodiment, as shown in FIG. 1, the contact cleaning body 4 is attached to the input / output end 33 on the side opposite to the drive source 2. The contact cleaning body 4 mainly has a fixture 40 and a multi-layer cloth 5.

FIG. 3 is an exploded side view showing the contact cleaning body 4 and the fixture 40, and FIG. 5 is an enlarged perspective view of the layered cloth 5.

The fixture 40 has a stepped bolt 41, a nut 42, and a pair of washers 43. The stepped bolt 41 is formed of a hexagonal screw head 41a, a male screw portion 41b provided upright at the center of the plane of the screw head 41a, and a cylindrical shape in which the tip of the male screw portion 41b is thinner than the male screw portion 41b. It has a connected end 41c. The connection end 41c and the core end 31a are inserted into both ends of the cylindrical coupling 34, and two fasteners 35 are screwed in from the side surface of the coupling 34 to be integrally fixed. The core material end portion 31a is a cylindrical rod-shaped member that does not bend, and is coaxially fixed to the core material 31. As a result, both the core material 31 and the core material end portion 31a rotate about the axis. In the vicinity of the connection portion of the core material 31 with the core material end portion 31a, a convex portion (not shown) is provided in a ring shape, and a concave portion is provided in the facing portion of the cover 32. The core material 31 is configured so as not to come off. A pair of washers 43 is inserted into the male screw-shaped portion so as to sandwich the layered cloth 5 or a sponge 6 described later, and a nut 42 is attached so as to tighten the washer 43.

As shown in FIG. 4, the multi-layer cloth 5 is mainly composed of, for example, a cloth body 50 in which 15 sheets are stacked. The layered cloth 5 has a through hole 51, a tightly sewn portion 52, a diameter sewn portion 53, and a cleaning edge portion. The cloth body 50 is made of a durable cloth having a certain degree of elasticity. The outer size (diameter) of the circular cloth 50 and the multi-layer cloth 5 made by stacking a plurality of cloths 50 of the same size and the same material with their centers aligned is larger than the inner diameter size (diameter) of the duct D to be cleaned. It is preferably a little larger. As a result, even if the flexible shaft 3 at hand (on the drive source 2 side) is operated to lift the cloth body 50 and the multi-layer cloth 5 inserted in the duct D, the flexible shaft 3 does not lift due to the presence of the curved flexible shaft 3, but itself. The outer periphery of the layered cloth 5 which is in a standing state with the strength of the above hits the inside of the ceiling surface of the duct D, and the inside of the ceiling surface is also cleaned. Therefore, it is possible to clean the entire inner wall of the duct D, which is out of reach of humans, without omission of cleaning.

The through hole 51 is a hole drilled in the cloth body 50 so as to correspond to the diameter of the input / output end 33 of the flexible shaft 3. The tightly sewn portion 52 is for reinforcing the periphery of the through hole 51 by being sewn around the through hole 51 at predetermined intervals. The diameter sewing portion 53 penetrates the cloth 50 of all layers and is sewn together at a diameter of a predetermined ratio with respect to the diameter of the duct D, in other words, the diameter of the inner surface D1 of the duct D, to sew the layered cloth 5 of the duct D. This is for making a suitable contact with the inner surface D1. The diameter of a predetermined ratio from the center to the outermost shape to be sewn can be a distance of less than 90% from the center with respect to the radial distance, more preferably a distance of less than 80%, and a distance of less than 70%. It is more preferable that the distance is less than 60%. Further, the diameter of a predetermined ratio from the center to the outermost shape to be sewn can be a distance of 10% or more from the center with respect to the radial distance, more preferably 20% or more, and more preferably 30% or more. It is more preferable to set the distance to 40% or more. The cleaning edge portion 54 is the outer edge of the diameter sewing portion 53, and in this embodiment, for example, the outer edges of the 15 cloth bodies 50 are separated from each other and come into direct contact with the inner surface D1 of the duct D. Can be reliably cleaned. Here, in the present embodiment, by setting the outer edge of the layered cloth 5 as the cleaning edge portion 54 for making the part of the cloth 50 separated from each other in this way, suitable cleaning by the rotational operation becomes possible.

Hereinafter, an embodiment in which the duct D is cleaned by using the duct cleaning system A in this embodiment will be described. As shown in FIG. 6, as the duct D, for example, a duct D formed into a bent shape is usually used. That is, the duct D is formed in a long tubular shape, and by providing the curved portion D2, the duct D is formed in an appropriate bent and curved shape according to the installation location.

5 (A), 5 (B) and 5 (C) show an embodiment in which, for example, a duct D provided for exhausting a building is cleaned by using the duct cleaning system A according to the present embodiment. It is explanatory drawing. In this embodiment, the process of attaching the layered cloth 5 to the flexible shaft 3 and gradually cleaning the inside of the duct D is shown. First, when the layered cloth 5 is inserted into the entrance of the duct D, the rotation speed generated by the drive source 2 is set to a relatively low rotation speed.

Then, as the layered cloth 5 is advanced into the duct D as shown in FIG. (B), the rotation speed is made higher than that in FIG. (A) and the rotation speed is gradually increased. As the rotation speed increases, the centrifugal force generated on the outer circumference of the layered cloth 5 becomes stronger, and cleaning becomes stronger.

At this time, by inserting the suction device B from the opposite side of the duct D, the dirt leaked together with the floating dust and detergent generated by the rotation of the layered cloth 5 is sucked.

Then, when the layered cloth 5 reaches the outlet of the duct D, the dirt in the duct D can be sufficiently removed.

Further, in this embodiment, as shown in FIG. 5C, both ends of the flexible shaft 3 are set to have the same shape, so that the drive source 2 and the layered cloth 5 are reversed from the state shown in FIG. 5B. Cleaning can be further advanced by replacing the layered cloth 5 with the side and moving the layered cloth 5 in the opposite direction. At this time, it goes without saying that the layered cloth 5 can be replaced with another one.

<Modification example>

A modified example of this embodiment will be described below. Regarding the modified example, the same reference numerals are given to those corresponding to the components of the above embodiment, and detailed description thereof will be omitted.

In this modification, as shown in FIG. 6, a mode in which the sponge 6 is attached instead of the layered cloth 5 is shown. An enlarged view of the sponge 6 is shown in FIG.

Although the sponge 6 has the same outer shape as the layered cloth 5, for example, a sponge material formed in a disk shape is integrally molded. Further, of course, it does not deny the mode of using a sponge material formed in a plurality of disc shapes or a sponge material formed in a polygonal shape instead of a circular shape.

As shown in FIG. 6, the sponge 6 has a disc-shaped sponge body 60, a through hole 51 formed in the center of the sponge body 60, and the outer edge of the sponge body 60 directly on the inner surface D1 of the duct D. It has a cleaning edge 62 that can be contacted. Even when the sponge 6 is attached to the flexible shaft 3, the duct D can be preferably cleaned as in the above embodiment.

As described above, the duct cleaning device 1, the duct D cleaning device, and the duct cleaning system A according to the present embodiment are formed into a tubular shape by being interchangeably attached to the flexible shaft 3 and the tip of the flexible shaft 3 and rotating. Since it has a contact cleaning body 4 mainly composed of a fibrous material for removing dirt on the inner surface D1 of the duct D, the inner surface D1 of the duct D can be reliably cleaned.

In particular, in this embodiment, the flexible shaft 3 has a flexible cover 32 and a core material 31 covered by the cover 32, which is suitable for ducts D formed in various shapes. Can be accommodated.

Further, the duct cleaning device 1 according to the present embodiment includes a speed adjusting mechanism 22 which is a rotation speed control mechanism in which the drive source 2 gradually increases the rotation speed from the start of activation and controls the rotation speed to a predetermined speed at which a predetermined cleaning can be performed. Since it has, it is possible to perform suitable cleaning without causing unnecessary irritation or damage to the duct D.

Since the flexible shaft 3 according to the present embodiment has the same shape at the base end portion and the tip end portion and is configured to be able to connect to the drive source 2 and the contact cleaning body 4 in the forward and reverse directions, the duct D is provided. On the other hand, cleaning can be performed freely from the forward and reverse directions.

Then, in the present embodiment, by applying the multi-layer cloth 5 which is composed of a plurality of cloth materials stacked as the contact cleaning body 4, the efficiency is high while sandwiching the dirt in the duct D between the individual cloths. Can be washed.

Since the plurality of layers of cloth 5 are sewn together at a portion corresponding to the diameter of the duct D, it is possible to suitably contact the inner surface D1 of the duct D. That is, by providing the diameter sewing portion 53, the cloth body 50 is not completely deformed, but the diameter sewing portion 53 is polymerized to maintain a firm shape, and the outer cloth body 50 is freely deformed. Can be transformed. Therefore, while maintaining the overall strength of the multi-layer cloth 5 for firmly wiping off oil stains and the like, the dirt can be firmly wiped off by the softly deformed outer cloth 50.

Further, the fixing tool 40 for fixing the layered cloth 5 while maintaining the shape firmly from the center of the layered cloth 5 to the diameter sewing portion 53, the core material end portion 31a to which the fixing tool 40 is connected, and the coupling Since the 34 is formed of a member that does not deform (curve) like the flexible shaft 3 (a metal member in this embodiment), the layered cloth 5 can be kept standing inside the duct D. That is, the radial direction from the center of the multi-layer cloth 5 to the diameter sewing portion 53 and the axial core direction of the fixture 40, the core material end portion 31a, and the coupling 34 are substantially right angles, and the diameter sewing portion 53. This substantially right-angled state can be maintained by the strength of the fixing tool 40, the core material end portion 31a, and the coupling 34. Therefore, when the flexible shaft 3 is passed through the duct D which is bent or curved in various directions, the flexible shaft 3 which is along the direction of the duct D (which is relatively close to parallel) is referred to. The layered cloth 5 maintains a right-angled state, and the outside of the cloth 50 is always opposed to the inner surface of the duct D. Therefore, the inner surface of the duct D can be reliably and stably cleaned on the outside of the cloth body 50.

Further, when the sponge 6 is attached to the fixture 40, the sticky dirt can be scraped off. Further, since the sponge 6 has a certain degree of rigidity, the disk shape of the sponge 6 can be maintained when rotated, and not only the lower side and the side surface of the duct D but also the upper side can be cleaned.

Further, since the contact cleaning body 4 attached to the tip of the flexible shaft 3 can be replaced, for example, a sponge 6 is attached to remove sticky dirt, and then a multi-layer cloth 5 is attached to firmly wipe off the remaining dirt. Alternatively, ducts D having different diameters can be appropriately cleaned by attaching a sponge 6 or a multi-layer cloth 5 having a size suitable for the diameter.

The second embodiment of the present invention will be described below. Regarding the modified example, the same reference numerals are given to those corresponding to the components of the above embodiment, and detailed description thereof will be omitted. The second embodiment relates to the flexible shaft 3.

The flexible shaft 3 according to the present embodiment has substantially the same basic configuration as that of the first embodiment. In the second embodiment, the shape of the fixture 40 is different, and a connection mechanism 3A for facilitating the attachment / detachment of the fixture 40 is provided.

FIG. 7 is a partially longitudinal enlarged front view showing the connection mechanism 3A and the fixture 40 (mounting portion) provided at one end of the flexible shaft 3. FIG. 8 is an enlarged front view showing a state in which the fixture 40 is removed from the connection mechanism 3A. 9A and 9B are explanatory views described from different directions in order to show another main part of the connection mechanism 3A, and FIG. 9A shows an enlarged plan view of a detached state in which the fixture 40 is attached and detached. B) is an enlarged plan view of the wearable state when the fixture 40 is to be mounted.

Hereinafter, the flexible shaft 3 and the fixture 40 according to the present embodiment will be described with reference to FIGS. 7 to 9. First, the fixture 40 will be described.

The fixture 40 has a main body 44 and a nut 42 similar to the above embodiment. Since the nut 42 is for fixing the layered cloth 5 and the sponge 6 as in the above embodiment, detailed description thereof will be omitted.

As shown in FIG. 8, the main body 44 has a retaining pin 45, a rotation-prohibited convex base 46, and a male screw portion 47 for screwing into the nut 42 in this order. The male screw portion 47 is for screwing into the nut 42 and for inserting and fixing the male screw portion 47 through the center of the layered cloth 5 and the sponge 6 according to the above embodiment. The retaining pin 45 has a pin body 45a extending from the center of the rotation prohibition convex base 46 and a retaining recess 45b (fitting recess) which is a curved concave constriction formed in an intermediate portion of the pin body 45a. doing. The retaining pin 45 is inserted into a mounting hole (not shown) formed in the center of the tip of the flexible shaft 3 in the axial direction, and the retaining recess 45b, which is the constriction, engages with the flexible shaft 3 side to cause the shaft. It engages with the flexible shaft 3 side so that it cannot move in the central direction. The rotation-prohibited convex base portion 46 has a substantially disk shape and has a shape having a straight convex portion passing through the center on the retaining pin 45 side, and the side surface of the convex portion constitutes the convex surface 46a. The convex surface 46a abuts on the concave surface 37a (see FIG. 7), which is the side surface of the concave portion formed in a radial straight line passing through the center on the main body 44 side of the disk-shaped rotation prohibition portion 37, with almost no gap, and is on the flexible shaft 3 side. Engages in the direction around the axis without relative rotation.

The connection mechanism 3A is formed to have the same shape at both ends on the flexible shaft 3 side. As shown in FIG. 7A, the connection mechanism 3A is driven by an insertion receiving portion 36 that receives the insertion of the drive source 2 (see FIG. 1) and a part of the fixture 40 (such as the retaining pin 45). It has a rotation prohibition unit 37 for prohibiting relative rotation in the axial direction with respect to the source 2 and the fixture 40, and an operation unit 38 for performing an operation of attaching / detaching to / from the drive source 2 and the fixture 40.

As shown in FIG. 7A, the insertion receiving portion 36 is formed in a cylindrical shape having a through hole 36c in the center, and a locking hole that radially penetrates from the side surface to the through hole 36c at one of the insertion receiving portions 36. It has 36b. In the locking hole 36b, a recessed pin 36a having a substantially cylindrical shape slightly longer than the length of the locking hole 36b and having both end surfaces protruding in an arc shape (spherical portion) is provided in the locking hole 36b. It is housed so as to be slidable in the length direction (radial direction of the insertion receiving portion 36). The outer circumference of the insertion receiving portion 36 is covered with a cylindrical operating portion 38.

The rotation prohibition portion 37 has a concave surface 37a to which the convex surface 46a of the rotation prohibition convex base portion 46 fits. That is, the fixture is fitted by fitting the convex surface 46a, which is formed to be convex in a straight line in the direction orthogonal to the longitudinal direction, to the concave surface 37a, which is also formed to be concave in a straight line in the direction orthogonal to the longitudinal direction, without a gap. 40 is attached to the connection mechanism 3A in a rotation-prohibited state (relatively non-rotating state).

The operation unit 38 is capable of slidably moving in the longitudinal direction, and has an operating posture (P) capable of allowing the insertion receiving unit 36 and the rotation prohibition unit 37 to function to enable normal operation, and the insertion receiving unit 36. And the release posture (Q) that can release the function of the rotation prohibition unit 37 and allow it to be removed from the drive source 2 or the fixture 40.

Specifically, as shown in FIG. 7, when the operation unit 38 is in the operating posture (P), the inner surface of the through hole of the operation unit 38 comes into contact with the outer end surface of the recess pin 36a, and the recess pin 36a Is maintained in a state of protruding in the axial direction, and the inner end surface of the recessed pin 36a is brought into contact with the retaining recess 45b (fitting recess) of the retaining pin 45 to perform uneven engagement. As a result, the movement of the retaining pin 45 in the axial direction is restricted by the recess pin 36a, and the fixture 40 is prohibited from being pulled out in the axial direction. At the same time, the state in which the convex surface 46a of the rotation prohibition convex base 46 is engaged with the concave surface 37a of the rotation prohibition portion 37 formed in a concave shape is also maintained. As a result, the relative rotation of the core material 31 and the fixture 40 around the axis is prohibited, and the rotational driving force from the driving source 2 is smoothly transmitted to the layered cloth 5 and the sponge 6.

Since the operation unit 38 is elastically urged to the operating posture (P) by an elastic body (not shown), the problem that the fixture 40 is suddenly pulled out from the flexible shaft 3 during the work is effectively avoided. ing.

In particular, in this embodiment, the insertion receiving portion 36 has a spherical portion formed in a partially spherical shape for urging the operating portion 38 to urge the drive source 2 and the fixture 40 to prevent them from coming off. Since the recessed pin 36a (retaining member) is provided, unnecessary friction and wear between the connecting mechanism 3A and the fixture 40 do not occur. As a result, the durability of the entire duct cleaning device 1 is maintained well.

As shown in FIG. 9B, when the operating portion 38 is in the release posture (Q) in which the operating portion 38 is retracted toward the shaft body 30 against the elastic force, the locking hole 36b of the insertion receiving portion 36 The operation unit 38 does not exist on the outer circumference, and the recess pin 36a can move outward. Therefore, when the retaining pin 45 is inserted / removed, the recessed pin 36a can be pushed outward (in the extraction / extraction direction) by the curved surface of the retaining recess 45b, and the retaining pin 45 can be inserted / removed. it can. The recessed pin 36a has an appropriate locking projection so that the pin 36a does not fall out completely, and the moving range is restricted so that the pin 36a does not fall out from the locking hole 36b of the insertion receiving portion 36.

As described above, according to the second embodiment of the present invention, by providing the fixing tool 40 and the connecting mechanism 3A, it is possible to more smoothly attach / detach the flexible shaft 3 to / from the fixing tool 40. ..

Further, when the operation unit 38 is configured to change from the operation posture (P) to the release posture (Q) by the sliding operation, the operator may be wearing gloves and cannot perform delicate work. The accurate and smooth attachment / detachment operation of the fixture 40 is guaranteed.

Further, by elastically urging the operation unit 38 to the operating posture (P), the operating posture (P) can be stably maintained, and the stable operation of the duct cleaning device 1 can be satisfactorily maintained. ..

Then, the insertion receiving portion 36 is a retaining member having a spherical portion formed in a partially spherical shape for urging the operating portion 38 to urge the drive source 2 and the fixture 40 to prevent the insertion / receiving portion 36 from coming off. By having the recessed pin 36a (retaining portion), further good durability and stable operation are realized.

The third embodiment of the present invention will be described below. With respect to the third embodiment, the components corresponding to the components of the first embodiment or the second embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. The third embodiment relates to the flexible shaft 3.

The flexible shaft 3 according to the present embodiment has substantially the same basic configuration as that of the second embodiment. In the third embodiment, the shapes of the fixture 40B and the connecting mechanism 3B are different from those in the second embodiment.

FIG. 10 is a partially longitudinal front view of the connection mechanism 3B and the fixture 40B (mounting portion) provided at one end of the flexible shaft 3 of the third embodiment. FIG. 11 is a partial cross-sectional front view showing a state in which the fixture 40B is removed from the connection mechanism 3B connection mechanism 3B.

The connection mechanism 3B surrounds a cylindrical or cylindrical insertion receiving portion 36 fixed to the end portion 31a of the core material of the flexible shaft 3 by a stopper 35 in a non-rotating manner, and the outer circumference of the insertion receiving portion 36. It has a cylindrical operation unit 38 provided in the above.

The operation unit 38 is provided with a pin retracting recess 38a long on the inner surface in the axial direction of the flexible shaft 3. The retracting recess 38a is provided with an inclined surface that is inclined toward the moving direction of the operating portion 38. The operation unit 38 is elastically urged toward the flexible shaft 3 side, which is the base side, by an elastic body (not shown).

The insertion receiving portion 36 has a hexagonal column-shaped through hole 36c formed along the central axis. Further, the insertion receiving portion 36 is formed with a locking hole 36b penetrating in the radial direction, which is a direction orthogonal to the through hole 36, at an intermediate position in the longitudinal direction of the through hole 36c. Inside the locking hole 36b, a recess pin 36a is provided so as to be slidable in the longitudinal direction of the locking hole 36b (that is, the radial direction with respect to the axial direction of the flexible shaft 3). The recessed pin 36a is elastically urged outward in the radial direction of the insertion receiving portion 36 by an elastic body (not shown).

The fixture 40B has a male screw portion 47 for screwing into the nut 42 on the tip end side, and a retaining pin 45 that projects long toward the flexible shaft 3 side. The retaining pin 45 has pin bodies 45a and 45a formed in a hexagonal column shape, and a retaining recess 45b formed in a concave shape in the middle thereof. A rotating locking surface 45c, which is a hexagonal cross section, is formed on the outer periphery of the pin bodies 45a and 45a.

With this configuration, the connection mechanism 3B protrudes at the inner surface of the operation unit 38 (the portion without the retracting recess 38a) when the operation unit 38 is urged and in contact with the flexible shaft 3 side in the operating posture (P). A part of the recessed pin 36a is projected inward of the through hole 36c, and the protruding portion of the recessed pin 36a is fitted into the retaining recess 45b formed in the retaining pin 45 of the fixture 40B, and the recessed pin 36a is retracted in FIG. Maintain the stopped state (used state). At this time, the recessed pin 36a is pressed against the inner surface of the operating portion 38 and securely fits into the retaining recess 45b of the fixing tool 40B, so that the fixing tool 40B is reliably prevented from coming off.

When the operation unit 38 is pulled out from the flexible shaft 3 by the user in the release posture (Q), the operation unit 38 projects outward in the radial direction so that the recess pin 36a fits into the retracting recess 38a of the operation unit 38. The sink pin 36a moves, and as shown in FIG. 11, the sink pin 36a does not protrude into the through hole 36c at all, and the retaining pin is released. Therefore, the fixture 40B can be pulled out or the fixture 40 can be inserted.

When shifting from the release posture (Q) to the operating posture (P), the inclined surface of the retracting recess 38a presses the spherical surface at the outer end of the recess pin 36a, so that the inner end of the recess pin 36a is smooth. It protrudes into the through hole 36c and fits into the retaining recess 45b of the fixture 40B.

With the above configuration, the duct cleaning system A of the third embodiment has the same function and effect as the duct cleaning system A of the first embodiment, and as in the second embodiment, the fixture 40B of the contact cleaning body 4 is used. It can be easily and speedily attached to and detached from the connection mechanism 3B of the flexible shaft 3 with one touch.

That is, when the operation portion 38 of the connection mechanism 3B is pulled out in the direction away from the flexible shaft 3, the elastically urged recessed pin 36a is inside the retracting recess 38a as shown in the release posture (Q) of FIG. The lock is released so that it does not come into contact with the retaining recess 45b of the fixture 40B. Therefore, the retaining pin 45 of the fixture 40B can be inserted / removed from the through hole 36c of the connecting mechanism 3B.

If the retaining pin 45 of the fixture 40B is inserted into the through hole 36c of the connection mechanism 3B and the operation portion 38 of the connection mechanism 3B is released, the elastically urged operation portion 38 moves to the flexible shaft 3 side for operation. The slope of the retracting recess 38a provided in the portion 38 pushes the recessed pin 36a into the through hole 36c of the connecting mechanism 3B, and the tip of the recessed pin 36a protrudes into the through hole 36c. The tip of the protruding through hole 36c engages with the retaining recess 45b formed in the retaining pin 45 of the fixture 40B, and the retaining pin 45 of the fixture 40B cannot move in the insertion / extraction direction. It becomes.

As a result, the operating posture (P) shown in FIG. 10 is obtained, and when the core material end portion 31a in the flexible shaft 3 rotates, the connection mechanism 3B fixed to the core material end portion 31a also rotates and is connected. The fixture 40B fixed (locked) to the mechanism 3B and the contact cleaning body 4 having the fixture 40B rotate together.

In each of the above examples and modifications, a cloth material or a sponge is used as the contact cleaning body, but for example, a material such as a paper material or a wood may be used in the category of a fibrous material.

The present invention can be widely used for cleaning ducts arranged for the purpose of exhaust and drainage.

1 ... Duct cleaning device 2 ... Drive source 3 ... Flexible shaft 30 ... Intermediate part (shaft body)
33 ... Base end (input / output end)
33 ... Tip (input / output end)
36 ... Insertion receiving part 36a ... Suspended pin 37 ... Rotation prohibited parts 38, 38A, 38B ... Operating part 4 ... Contact cleaning body 40, 40A, 40B ... Mounting part (fixing tool)
5 ... Multi-layer cloth

Claims (4)

A drive source that applies rotational driving force and
A base end to which the driving force applied from the driving source is input, an intermediate portion capable of transmitting the driving force input from the base end and having flexibility, and a driving force transmitted to the outside from the intermediate portion. A duct cleaning device having a flexible shaft having a tip to obtain.
The flexible shaft includes a flexible cover and
With a flexible core covered by this cover,
The cover and the core material are configured such that the core material is rotatably and non-fixed in the cover about the longitudinal direction.
Have a contact cleaning element in contact remove dirt of the inner surface of the duct formed in the tubular by rotating operative tip interchangeably attached to the flexible shaft,
The drive source has a rotation speed control mechanism capable of gradually increasing the rotation speed from the activation and changing the rotation speed to a predetermined speed at which a predetermined cleaning can be performed.
The contact cleaning body has a cloth material portion provided with a through hole through which the tip of the flexible shaft is inserted in the center of each of the cloth materials in which a plurality of cloth materials are stacked.
The cloth material portion is provided with a diameter sewing portion for sewing a plurality of the cloth materials in a stacked state.
The diameter sewing portion is provided at a distance of 10% to 90% from the center in the radial distance from the center to the outer circumference of each cloth material, and the cloth material on the outer peripheral side thereof is in a non-fixed state. It has a structure that can be freely deformed, and is sewn through all layers of the cloth material portion at a diameter that is a predetermined ratio to the inner diameter size of the duct.
A duct cleaning device having a cleaning edge portion that is in direct contact with the inner surface of the duct while the outer edges of the cloth material are separated from each other on the outside of the diameter sewing portion . The duct cleaning device according to claim 1 , wherein the contact cleaning body is formed by stacking a plurality of sheets of the same cloth material . A base end to which a driving force applied from a driving source is input, a driving force input from this base end can be transmitted and a flexible intermediate portion, and a driving force can be transmitted to the outside from this intermediate portion. A duct cleaning tool with a flexible shaft with a tip.
The flexible shaft includes a flexible cover and
With a flexible core covered by this cover,
The cover and the core material are configured such that the core material is rotatably and non-fixed in the cover about the longitudinal direction.
It has a contact cleaning body that is replaceably attached to the tip of the flexible shaft and rotates to remove dirt from the inner surface of the duct formed in a tubular shape.
The drive source has a rotation speed control mechanism capable of gradually increasing the rotation speed from the activation and changing the rotation speed to a predetermined speed at which a predetermined cleaning can be performed.
The contact cleaning body has a cloth material portion provided with a through hole through which the tip of the flexible shaft is inserted in the center of each of the cloth materials in which a plurality of cloth materials are stacked.
The cloth material portion is provided with a diameter sewing portion for sewing a plurality of the cloth materials in a stacked state.
The diameter sewing portion is provided at a distance of 10% to 90% from the center in the radial distance from the center to the outer circumference of each cloth material, and the cloth material on the outer peripheral side thereof is in a non-fixed state. It has a structure that can be freely deformed, and is sewn through all layers of the cloth material portion at a diameter that is a predetermined ratio to the inner diameter size of the duct.
A duct cleaning tool having a cleaning edge portion that is in direct contact with the inner surface of the duct while the outer edges of the cloth material are separated from each other on the outside of the diameter sewing portion . The duct cleaning device according to claim 1 or 2,
It is provided with a suction device that sucks the floating matter in the duct that floats during the operation of the contact cleaning body.
Duct cleaning system.

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