JP2005131111A - Cleaning apparatus and cleaning brush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning apparatus and a cleaning brush which keep cleaning efficiency by keeping the performance of combing up dust, suction force and performance of collecting the dust even when using it for a long period, and which can be used for a long time and are comparatively inexpensive by simplifying mechanism. <P>SOLUTION: The cleaning apparatus is provided with the cleaning brush B having a rotary shaft 1 and brush bristles 2 which are provided spaced peripherally in the peripheral direction of the rotary shaft 1 nearly in a radial state in a view of the cross section of the shaft. The brush B has a brush bristle extension mechanism for extending the brush radius (r) of the brush bristles 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cleaning brush that cleans a cleaning surface by rotating itself, and a cleaning machine including the cleaning brush.

  As a rotary cleaning brush that rotates at high speed and lifts an irregular shape from the cleaning surface, the brush extends at substantially equal angles in the circumferential direction around the rotating shaft 1 ′ and in the axial length direction of the rotating shaft 1 ′. There is a rotating brush provided with bristles 2 '. Such a rotating brush is provided in a cleaning machine that advances in a self-propelled manner or a hand-held manner so that the rotating shaft 1 ′ is substantially parallel to the cleaning surface and the tip of the brush bristles 2 ′ is always in contact with the cleaning surface. In particular, as shown in FIG. 6, for example, a cleaning machine that advances while rotating at a high speed with the rotation axis 1 ′ of the brush bristles 2 ′ as the width direction of the cleaning machine, the trash in the width direction of the cleaning machine that is moving continuously Can be lifted up. Since such a cleaning machine can efficiently clean a relatively wide cleaning surface, for example, it is suitable for cleaning dust on the road surface, cutting grass on the turf surface, dead grass, and the like.

However, since the brush bristles 2 'keep scratching the cleaning surface at a high speed while the rotary shaft 1' is kept at a constant height during cleaning, the brush end is worn as shown in FIG. 'becomes shortened from the original brush radius _r'0. In such a state, the gap g _'1 is would occur between the tip and the cleaning surface of the brush bristles 2', there is a problem that can not be cleaned can not frying scrape dust (Figure 6).

Regarding the above problem, conventionally, a cleaning machine main body provided with a rotating brush having a rotation axis on the left and right in the traveling direction, a progressing roller in contact with the cleaning surface in front of the traveling direction, and the rotational axis position of the traveling roller with respect to the cleaning machine main body. There has been a cleaning machine provided with a mechanism that can be moved up and down (see, for example, Patent Document 1). This is a mechanism that adjusts the inclination of the cleaning machine main body with respect to the cleaning surface by extending and contracting the vertical portion of the pivot frame of the advance roller by a screwing structure and shifting the rotational axis position of the advance roller up and down. By shortening the distance between the cleaning surface and the rotating brush, for example, as shown in FIG. 6, the gap g ′ ₁ between the brush bristles 2 ′ that have been worn out and shortened and the cleaning surface is eliminated. It is also possible to scrape the dust.

In addition, there has conventionally been a cleaning machine provided with a mechanism for moving the position of the shaft of the rotary brush up and down with respect to the main body of the cleaning machine (see, for example, Patent Document 2 and Patent Document 3). In this mechanism, the rotating brush is supported by a connecting arm so as to be swingable, and the connecting arm is connected to an operation lever. This operation lever, by unloading a rotating brush to clean surfaces serving road, for example, as shown in FIG. 6, eliminates gap g _'1 and bristles 2' and the cleaning surface is shorter worn, scraped dust It can be fried.

However, any of these conventional cleaners sucks dust at a suction port composed of a rotating brush that rotates at a high speed and a front brush frame of the cleaner body. For this reason, a rotating brush whose brush hairs are worn and shortened due to use not only has a gap g ′ ₁ with the lower cleaning surface but also a gap g ′ ₂ with the front brush frame, and the suction port becomes larger. The suction power will decrease. And, just by adjusting the vertical position of the rotary brush position as in the conventional case, the cleaning efficiency is lowered by long-term use.

  Further, a scraper S ′ that comes into contact with the brush end at the rear of the axial cross section is provided above the inside of the rear brush frame of the rotating brush, for example, as shown in FIG. In this method, the dust once scraped and adhering to the brush hair is further removed to the inside of the cleaning machine and collected into the cleaning machine. As a result, the scraper prevents the rotation of the rotating brush with dust attached, maintains the dust lifting performance for lifting new dust, and prevents the dust once lifted again from falling on the cleaning surface. It fulfills the recovery function.

However, any of the conventional cleaners generates a gap g ′ ₃ between the brush bristles worn and shortened by use and the rear scraper S ′, and the scraper that does not contact the rotating brush does not perform its function. End up. In other words, with the conventional vertical adjustment mechanism for the rotary brush position in the vertical direction, the dust that remains attached to the brush hair accumulates over a long period of time or for a long period of time, and the performance of raising the dust is inferior. On the contrary, the dust that has been lifted up once falls on the cleaning surface again. As a result, the dust collection performance of the cleaner is extremely lowered.

On the other hand, in addition to the conventional vertical adjustment mechanism of the rotary brush position, the scraper in the front brush frame and the rear brush frame is movable with respect to the main body of the cleaning machine, It is also conceivable to provide a direction adjusting mechanism. That is, the gap g ′ ₁ with the cleaning surface of the rotating brush, the gap g ′ ₂ with the front brush frame with respect to the main body of the cleaner, and the scraper S with respect to the main body of the cleaner so as to come into contact with the brush bristles that have become shorter due to long-term use. It is also conceivable to maintain the cleaning efficiency by making it possible to adjust all the gaps g ′ ₃ from “′”.

However, if such a longitudinal adjustment mechanism is provided in the front and rear brush frames in addition to the vertical adjustment mechanism of the rotating brush, the position adjustment mechanism becomes complicated due to the increase in the number of movable parts, and it can be used for a long time. It cannot be withstood and easily breaks, or it is expensive to ensure strength. In particular, such a cleaning machine that collects and lifts various dusts with a high-speed rotating brush has many usage modes in which a relatively wide range of cleaning is frequently performed by continuous operation. It is important to have a simple structure that can withstand. For this reason, the cleaner provided with all the adjustment mechanisms in the vertical direction of the rotating brush position, the front brush frame and the front and rear direction of the scraper has never been practical.
JP 2002-81033 A JP 2000-175563 A Japanese Patent Laid-Open No. 10-178895

  Therefore, the present invention can maintain the cleaning efficiency by maintaining the dust lifting performance, suction force, and dust collection performance even after long-term use, and the mechanism is simple. It is an object to provide a cleaning machine and a cleaning brush that can withstand long-term use and can be relatively inexpensive.

  (1) That is, the cleaning machine of the present invention includes a cleaning brush B having a rotating shaft 1 and brush bristles 2 that are provided in a circumferential direction in a circumferential direction with a circumferential interval in the circumferential direction of the rotating shaft 1. The cleaning brush B includes a brush bristle extending mechanism that extends the brush radius r of the bristle 2.

If this is the case, by extending the brush length 2l of the bristle 2 that has become worn and shortened by use, the brush radius r, which is the radius of the rotational circle trace drawn by the tip of the bristle 2, is changed to the original value. it can be enlarged to the size of r _0.

Thus, at the same time eliminate the gap g ₁ between the brush bristles 2 and the cleaning surface, to prevent the spread of the gap g ₂ between the front brush frame, and at the same time, it is possible to eliminate the gap g ₃ between the scraper S. Therefore, it is possible to maintain the dust lifting performance of the bristles 2 with respect to the cleaning surface, and simultaneously maintain the suction force related to the suction port, and at the same time, maintain the dust collection performance by the function of the scraper S.

  Further, the front-rear direction adjustment mechanism for the front brush frame FF and the rear scraper S is not necessary, and the vertical position adjustment mechanism for the cleaning brush B, such as the conventional cleaner, can be eliminated. Therefore, a cleaner having a simple structure that can withstand long-term use and does not easily break can be obtained at a low cost.

  Here, the brush radius r in the present invention refers to the radius of the rotation circle locus drawn by the brush end of the rotating cleaning brush.

  (2) Further, in the cleaning machine of the present invention, the brush bristle extension mechanism detachably fixes the holding body 3 that holds the root of the brush bristle 2 on the circumferential surface of the rotary shaft 1. Can be.

  If this is the case, the brush bristles 2 can be stretched after being worn by a simple mechanism that secures an extension of the brush radius r before use.

  Here, before use, the brush length 21 can be easily adjusted to a short one by a simple means of fixing the retainer 3. In addition, after use, the bristles 2 whose tips are worn can be easily and reliably extended by a certain length by a simple mechanism releasing means for removing the retainer 3.

  Thereby, a brush bristle extending | stretching mechanism can be obtained as a cheaper and durable thing. In addition, when the brush length 21 is long (before wear) or short (after wear), the brush radius r is maintained without being easily changed. There is no inferiority.

  Here, the root of the bristle 2 is a part extending from the peripheral surface of the rotary shaft 1 to the tip of the brush bristle 2 provided radially (that is, a substantially radial projecting structure part from the surface of the rotary shaft 1 and the brush The portion excluding the tip portion of the brush bristles 2 effective for scraping the dust among the bristles 2).

  (3) Moreover, the cleaning machine of this invention is the hole 31h for brushes which inserts the root of the bristle 2 in the cylindrical board 31 with which the said holding body 3 carries out circumference | surroundings with respect to the rotating shaft 1 with arbitrary circumferential angles. The root of the bristle 2 can be laid down by shifting the circumferential angle of the cylindrical plate 31 with respect to the rotating shaft 1.

  If this is the case, all the brush lengths 21 provided in the axial direction and the circumferential direction of the rotating shaft 1 are substantially equal by an easy adjustment operation of shifting the circumferential angle of the cylindrical plate 31 with respect to the rotating shaft 1. Can be extended by distance. Further, the brush bristle extension mechanism can be obtained as a cheaper and more practical one by the simple specific mechanism of the circumferential attachment of the cylindrical plate 31 to the rotating shaft 1. Furthermore, since the pressing body 3 is the cylindrical plate 31, it is difficult for dust to adhere to the pressing body 3 and to be entangled.

  (4) Alternatively, the cleaning brush B of the present invention includes a rotating shaft 1 that is provided in a cleaner and rotates, and brush hairs that are provided in a substantially radial manner in an axial sectional view with a circumferential interval from the peripheral surface of the rotating shaft 1. 2 and a bristle elongation mechanism that elongates the brush radius r, and this brush bristle extension mechanism has a pre-rotating shaft that holds the retaining body 3 that holds the root of the bristle 2 on its side. It is characterized by being detachably fixed to the peripheral surface of 1.

If such a cleaning brush B with the brush hairs 2 shortened in advance is used in a cleaning machine, the brush length 2l is extended to the original length even after the brush hairs 2 are worn, and the brush before use. it can be returned to the radius _{r 0.} Therefore, the dust lifting performance of the brush bristles 2 can be maintained, the suction function can be maintained at the same time, and the dust collecting function of the scraper can be maintained at the same time.

  Further, since the retaining body 3 is fixed “detachably”, that is, “detachable and reattachable”, not only the brush radius r, but also the brush length 21, the contact length of the tip of the brush bristles 2 with respect to the cleaning surface, and The contact angle which changes according to these can be adjusted, and the cleaning capability according to need including the strength of dust lifting can be obtained.

  Since the present invention is configured as described above, it is possible to easily adjust the positions of the cleaning surface, the front brush frame, and the scraper of the rear brush frame with respect to the cleaning brush, and use for a long time. Even after the bristles are worn out and shortened due to the above, it is possible to maintain the efficiency of dust lifting, suction force and dust recovery, maintain the cleaning efficiency, and the mechanism is simple, durable and inexpensive. And a cleaning brush provided in the cleaning machine.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out the present invention will be described below with reference to the drawings shown as examples. 1 to 5 show a first embodiment of a cleaning machine of the present invention provided with a cleaning brush B. FIG.

  FIG. 1 is an explanatory side view illustrating a usage state of the cleaning machine according to the first embodiment. FIG. 2 is an explanatory plan view of the cleaning brush B provided in the cleaning machine of Embodiment 1. FIG. 3 is an explanatory side view showing a use state in which the brush bristles 2 are shortened due to wear as a result of using the cleaning machine of the first embodiment. FIG. 4 is an explanatory side view showing a use state in which the bristles 2 shortened due to wear are extended after the state shown in FIG. 3 is reached. 5 is an explanatory side view at another cross-sectional position showing a use state similar to that in FIG. 4, and is a partially enlarged view of FIG. In addition, FIG. 6 is explanatory drawing which shows typically the example of a state of the conventional cleaning machine.

  The cleaning machine of the present invention is a cleaning machine provided with a cleaning brush B, which will be described later, so that it can rotate at high speed around an axis substantially parallel to the cleaning surface.

  As shown in FIG. 1, the cleaner includes a front rotating roller WF, a front brush frame FF, a cleaning brush B, a rear brush frame FR, a scraper S, a rear rotating roller WR, a dust storage tank C, An exhaust port CV is provided.

  This cleaning machine generates a suction airflow by high-speed rotation of the cleaning brush B and a suction motor (not shown) provided according to the application. The dust is sucked up by the suction airflow and the cleaning brush B, and the dust is sucked from the front brush frame FF. Further, the dust adhering to the brush bristles 2 is removed to the dust storage tank C and sucked by the scraper S provided in the rear brush frame FR. The suction airflow is exhausted from the exhaust port CV above the dust storage tank C.

  The front and rear rotating rollers WF and WR are long rolling wheels extending in the width direction of the cleaner. This advances the cleaning brush B while adjusting the cleaning surface before and after the cleaning brush B, supports the cleaner, and maintains the height of the cleaning brush B at a constant level.

In the embodiment, the front rotation roller WF can be adjusted in the vertical direction with respect to the main body of the cleaner by the screwing structure WF1 provided in the vertical portion of the pivot frame that pivotally supports the front rotation roller WF. Thus, by adjusting the inclination of the cleaner body, a gap g ₁ between the brush end and the cleaning surface of the brush bristles 2 can be finely adjusted.

  The front brush frame FF is a substantially three-way frame that covers from the front of the cleaning brush B to a part of both ends. Specifically, it consists of a curved plate that follows the rotation trajectory of the cleaning brush B, and a flat plate that is bent at both ends thereof. Further, its lower end is close to the cleaning surface, and a suction port is formed by the lower end of the three-sided frame and the tip of the bristles 2 of the cleaning brush B. The front brush frame FF protects the cleaning brush B that rotates at a high speed from the front, forms a suction port for sucking dust, and forms a dust collection path for guiding the scraped dust to the dust storage tank C. Is.

  The rear brush frame FR includes a curved plate that covers the rear of the cleaning brush B, and protects the cleaning brush B that rotates at a high speed from the rear.

  The scraper S is provided in the upper upper part of the rear brush frame FR so that the tip thereof is always in contact with the brush bristles 2 of the cleaning brush B. Thus, by contacting the brush bristles 2 that rotate at a high speed at the upper rear of the cleaning brush B, the dust that has been lifted up once and adhered to the brush bristles 2 is scraped off and collected in the cleaning machine. That is, the scraper S prevents the dust from adhering to the brush bristles 2 and maintains the dust lifting performance for lifting new dust. In addition, the dust once lifted is separated from the brush hair and collected into the cleaning machine, and the dust is prevented from returning to the cleaning surface, thereby maintaining the dust collecting function.

  The cleaning brush B of the present invention has a rotary shaft 1 provided in the cleaning machine so as to rotate in at least one circumferential direction, and is substantially radial in an axial sectional view with a circumferential interval from the peripheral surface of the rotary shaft 1. And bristles 2 provided continuously in the axial direction along the axial direction, and a brush bristle extension mechanism that elongates the brush radius r. Furthermore, in this embodiment, in addition to the brush bristle extension mechanism, a brush bristle shortening mechanism for shortening the brush radius r is also provided.

  The rotary shaft 1 is provided in the cleaning machine so as to rotate in at least one circumferential direction. Specifically, it is rotatably held near both ends so as to extend in the left-right width direction substantially parallel to the cleaning surface and with respect to the traveling direction of the cleaner. Further, power is applied from the end so as to rotate in at least one circumferential direction.

  The circumferential direction in which the rotary shaft 1 rotates at a high speed during cleaning is preferably a circumferential direction opposite to the traveling direction of the cleaner in a side view and is a so-called upper rotation with respect to the traveling direction. For example, in the left side view as in FIGS. 1, 3, and 4, it rotates in the clockwise direction (circumferential direction indicated by the curved arrow in FIG. 1) that is opposite to the leftward traveling direction. As a result, the cleaning brush B continuously sweeps up and sucks from the bottom to the front.

  The brush bristles 2 are provided in a direction that is substantially radial from the circumferential surface of the rotary shaft 1 with a circumferential interval therebetween. In the embodiment, as shown in FIGS. By being planted directly, it is possible to reliably maintain the substantial length of the brush bristles 2, that is, the brush length 21 even by the external pressure during use.

  Further, as shown in FIG. 2, the brush bristles 2 are a plurality of groups of bristles made up of several to a dozen or more bristles 2, which are continuously provided in the axial length direction of the rotary shaft 1. Consists of. Here, the adjacent bristle group spirals over the axial length direction on the peripheral surface of the rotating shaft 1 while slightly shifting the circumferential angle with respect to the rotating shaft 1 (that is, the phase angle of the planting position) in the same direction. It is fixed to line up. Thereby, more brush bristles 2 are provided continuously, and on the cleaning surface, fine dust is scraped up in order from the left and right directions of the cleaning width corresponding to the axial length of the rotary shaft 1. .

  The brush length 21 means the substantial length of the bristle 2 that performs the brush function.

  The brush radius r refers to the radius of the rotation circle locus drawn by the brush end as the rotating cleaning brush B rotates. This is the distance from the rotation center to the brush end, as shown in the drawings of the first embodiment.

  The brush end is the tip of the brush bristles 2. This is a part that always performs the main function of scraping the dust while being in contact with the cleaning surface, and is a part where the dust adhering to the brush bristles 2 is wiped off by contacting the scraper S at the upper part of the rear brush frame FR. The tip of the brush bristles 2 comes into contact with the cleaning surface at a high speed, and thus wears away from long-term or long-term use.

  The root of the bristle 2 excludes the tip part of the bristle 2 effective for scraping dust out of the part from the peripheral surface of the rotating shaft 1 to the tip of the brush bristle 2 provided radially. Say the rest. Here, the portion extending from the peripheral surface of the rotating shaft 1 to the tip of the brush bristles 2 provided radially is specifically a fixing structure that protrudes from the surface of the rotating shaft 1 and holds and fixes the bristles 2. It means the part which consists of the bristle 2.

  In the embodiment, the fixed structure is provided inside the rotary shaft 1, and only the bristles 2 protrude from the surface of the rotary shaft 1. In this case, the part which consists of the protruding bristle 2 is said. In addition, since only the bristle 2 protrudes, it becomes a comparatively long brush length 2l, and the bristle 2 excellent in the softness | flexibility which is comparatively hit can be obtained.

  The brush bristles 2 scrape the cleaning surface continuously at high speed and high pressure, and the cleaning brush B is often used continuously for a long time. For this reason, the fixing structure of the brush bristles 2 has a pressure resistance so that the brush length 21 and the fixing angle are not easily changed even by an impact external force during use. Further, since frictional heat is generated by the high speed rotation of the cleaning brush B, the brush bristles 2 and the fixing structure thereof are excellent in heat resistance.

  Thus, the brush bristle extension mechanism extends the brush radius r, and is configured to fix a later-described presser body 3 in advance so as to cover at least the peripheral surface of the rotary shaft 1 in a removable manner. More specifically, the brush bristle extension mechanism includes a cylindrical plate 31 that is a retaining body 3 and a circumferential attachment structure 4 that surrounds the cylindrical plate 31 with respect to the rotary shaft 1 at an arbitrary circumferential angle. The brush bristle extending mechanism shifts the circumferential angle of the cylindrical plate 31 with respect to the rotating shaft 1 in advance and lays the root of the brush bristle 2 in the same circumferential direction, and then attaches the cylindrical plate 31 by the circumferential structure 4. It is something to be made.

  With such a brush bristle extension mechanism by the circumferential attachment of the retaining body 3, it is possible to use the existing cleaning brush B (the brush length is not variable) and fix it to the rotary shaft 1 so that the brush is extremely inexpensive. The cleaning brush B and the cleaning machine provided with the hair extension mechanism can be obtained, which is highly practical.

  By lying down in the same circumferential direction, the cross-sectional view radiation angle of the brush bristles 2 is uniformly inclined toward the same circumferential direction as the lying down. Thereby, the contact angle and contact length with respect to the cleaning surface of the bristle 2 change uniformly. Further, not only the brush radius r but also the actual length of the brush bristles 2 that substantially perform the lifting function as a brush, that is, the brush length 21 is variable.

  The brush bristle shortening mechanism is formed by fixing the retainer 3 to the peripheral surface of the rotary shaft 1 so as to be reattachable.

  In other words, having a brush bristle extension mechanism and a brush bristle shortening mechanism means having a brush bristle extension / contraction mechanism that stretches (extends and shortens) the brush radius r. Specifically, the brush bristle expansion / contraction mechanism is configured such that the retainer 3 is detachably attached to the peripheral surface of the rotary shaft 1, that is, is “detachably” fixed.

  Thus, in addition to extending the bristle 2 in addition to the brush bristle extension mechanism, the brush length 2l of the bristle 2 can be shortened as needed. Then, in combination with the recumbency in the same circumferential direction of the root of the bristle 2 of the presser 3, the brush length 2 l (substantial length that fulfills the brush function of the bristle 2), the bristle 2 It is possible to freely adjust the contact length to the cleaning surface and the contact angle that varies in accordance with these. Therefore, it is possible to obtain a cleaning ability according to necessity such as the strength of dusting.

  The holding body 3 is used to hold the root of the brush bristle 2 in the same circumferential direction by holding an arbitrary section or arbitrary part of the root of the bristle 2 so as to approach the peripheral surface of the rotating shaft 1. It is something to be made. Specifically, the pressing body 3 includes a cylindrical plate 31 that covers the circumferential surface of the rotary shaft 1, and the cylindrical plate 31 is provided with a brush hole 31 h that passes through the root of the brush bristles 2.

  In particular, the circumferential direction in which the roots of the brush bristles 2 are lying is the rotational direction that is equally opposite to the rotational direction of the rotary shaft 1. If it is made to lie down in this circumferential direction, since the front-end | tip of the bristle 2 will incline toward the back of a rotation direction, the distance which touches a cleaning surface becomes long. As a result, more dust can be lifted up reliably. Further, the cleaning surface and the brush bristles 2 are not damaged unnecessarily.

  The cylindrical plate 31 is formed by combining a plurality of arc plates 31b having an arc-shaped cross section. Each arcuate plate 31b has the same shape and extends spirally in the axial length direction of the rotary shaft 1 in accordance with the fixed portion of the bristles 2. The arc plates 31b are connected and fixed so as to form a substantially cylindrical shape as a whole with a gap corresponding to the brush hole 31h. On the inner periphery of the arc plate 31b, a plurality of fitting grooves, which are fitting structures 42 described later, are provided at intervals in the circumferential direction. In addition, one arc plate 31b among the plurality of arc plates 31b has screw insertion holes for screwing a pressing screw 41, which will be described later, into a circumferential attachment structure 4, near both ends in the axial length direction.

  The brush hole 31h is provided in the cylindrical plate 31 as a continuous window having a spiral shape in the axial length direction so as to follow the fixed position of the brush bristles 2. And this brush hole 31h penetrates the fixed part to the rotating shaft 1 of the bristle 2 group which is the root of the bristle 2. In the embodiment, the cylindrical plate 31 is formed by the gaps between the plurality of arc plates 31b. The peripheral edge of the brush hole 31h is covered so as to surround the root of the brush bristles 2, and when the cylindrical plate 31 is shifted in the circumferential direction, the group of brush bristles is lying on the peripheral edge of the brush hole 31h. It is preferable that the peripheral edge of the brush hole 31h is formed with a curve so that the lying bristle 2 is not caught.

  The circumferential attachment structure 4 attaches the cylindrical plate 31 at an arbitrary circumferential angle with respect to the rotary shaft 1 so as to be removable at least. Specifically, it comprises a plurality of pressing screws 41 for screwing and fixing the cylindrical plate 31 to the rotary shaft 1 and a fitting structure 42 for determining the circumferential angle of the cylindrical plate 31. As long as this circumferential structure 4 is circumferentially attached at least in a detachable manner, the cylindrical plate 31 that has been circumferentially attached in advance is removed after the brush bristles 2 have been worn by using the cylindrical plate 31, so that the original brush length 2 l is obtained. The bristles 2 can be extended. More preferably, it is configured to be detachably attached, that is, to be detachable and reattachable. If it is detachable, the brush hair shortening mechanism described above is also provided. Moreover, when the operation of extending the bristle 2 is mistaken, the cylindrical plate 31 can be reattached and returned to an arbitrary brush length.

  The pressing screw 41 is provided with a non-slip continuous groove on the side surface of the head. It is also possible to provide a driver groove on the end face of the head. These facilitate the work of pressing and fixing the pressing screw 41.

  The fitting structure 42 is a structure that includes at least one fitting protrusion provided on the inner periphery of the cylindrical plate 31 and the peripheral surface of the rotating shaft 1 and a plurality of fitting grooves that are fitted thereto. . The fitting protrusion and the fitting groove may be provided on either the inner periphery of the cylindrical plate 31 or the peripheral surface of the rotating shaft 1. This makes it possible to easily recognize the magnitude of the circumferential angle step by step when the circumferential angle of the cylindrical plate 31 is shifted. Further, the circumferential angle of the circumferentially attached cylindrical plate 31 is not easily shifted so that the brush length 21 is not easily changed.

  In particular, the brush bristles 2 in use of the cleaning brush B are in contact with the cleaning surface at high speed and are continuously subjected to a high-pressure impact, so that the brush length 2 l is maintained and does not easily change during use. It is necessary to make it. For this reason, in order to make the fitting structure 42 more reliable, the fitting protrusion and the fitting groove are preferably provided so as to extend in the axial length direction. Alternatively, it is preferable to provide a plurality of fitting structures 42. The plurality of fitting grooves or fitting projections are provided at intervals in the circumferential direction when viewed in axial section.

  In addition, the fitting protrusion may be formed by the pressing screw 41, and the fitting groove may be provided with a screwing groove that is screwed into the pressing screw 41.

  The cleaning brush B and the cleaning machine configured as described above are used as follows.

  First, before the start of use of the cleaning brush B, the cylindrical plate 31 is circumferentially oriented with respect to the rotary shaft 1 so that the cylindrical plate 31 has an arbitrary circumferential angle that is pressed so as to lie down on the root of the bristles 2. Shift to After confirming the fitting position at this circumferential angle by fitting of the fitting structure 42, the pressing screw 41 is screwed in and the cylindrical plate 31 is circumferentially attached to the rotating shaft 1. In this way, the brush radius r is set short in advance, and this is used as the original length.

When the tip of the bristles 2 is worn due to long-term or long-term use, the pressing screw 41 is loosened to release the circumferential attachment of the cylindrical plate 31, and then the circumferential angle of the cylindrical plate 31 with respect to the rotary shaft 1 is set. By shifting in the opposite direction to that before the start of use, a part or all of the recumbency of the root of the bristle 2 is released. As a result, the brush bristles 2 are extended, and the brush radius r can be returned to the original length set in advance, that is, the brush radius r ₀ at the start of use before wear. In this way, the brush radius r formed by the rotation trajectory of the tip of the brush bristles 2 can be maintained at the original brush radius r ₀ regardless of whether the bristles 2 are worn or not. The gap g ₁ with the cleaning surface of the rotating brush, the gap g ₂ with the front brush frame FF, and the gap g ₃ with the scraper S can all be adjusted and maintained easily.

  Moreover, the contact angle and the contact length of the brush bristles 2 with respect to the cleaning surface can be adjusted as necessary by shifting the cylindrical plate 31 so that the circumferential angle of the cylindrical plate 31 with respect to the rotation axis 1 becomes arbitrary. it can.

  In addition, the specific configuration of each part is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  The cleaning brush thus obtained and the cleaning machine equipped with the cleaning brush are preferably used particularly for sweeping up relatively large amounts of dead grass remaining on the lawn surface and dust on the road surface. However, with regard to the cleaning brush, in addition to this application, as a rotary cleaning brush that can cause abrasion of the brush hair, polishing, cleaning, etc. of surfaces of metals, non-ferrous metals, glass plates, etc., for example, in a pusher type continuous furnace, etc. It has various uses such as removal of deposits.

It is side explanatory drawing which shows the use condition of the cleaning machine of Example 1 of this invention. FIG. 3 is an explanatory plan view of the cleaning brush of Example 1. It is side surface explanatory drawing which shows the use condition which the brush hair became short by abrasion as a result of using the cleaning machine of Example 1. FIG. It is side surface explanatory drawing which shows the use condition which extended the bristle shortened by abrasion as a result of using the cleaning machine of Example 1. FIG. It is side surface explanatory drawing which shows the use condition which extended the bristle shortened by abrasion as a result of using the cleaning machine of Example 1. FIG. It is side surface explanatory drawing which shows the use condition which the brush hair became short by abrasion as a result of using the conventional cleaning machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Brush hair 3 Holding body 31 Cylindrical plate 31h Brush hole B Cleaning brush r Brush radius

Claims (4)

A cleaning machine comprising a cleaning brush having a rotating shaft and brush bristles provided in a radial direction in an axial cross section with a circumferential interval in the circumferential direction of the rotating shaft, the cleaning brush having a brush radius A cleaning machine having a brush hair extending mechanism for extending. The cleaning device according to claim 1, wherein the brush bristle extension mechanism is configured to removably fix a holding body that holds the root of the brush hair so as to lie down on the peripheral surface of the rotating shaft. The holding body is formed by providing a brush hole through which a bristle root is inserted in a cylindrical plate that is attached at an arbitrary circumferential angle with respect to the rotation axis, and shifts the circumferential angle of the cylindrical plate with respect to the rotation axis. 3. The cleaning machine according to claim 2, wherein the root of the brush hair is laid down. A rotary shaft provided in the cleaning machine, rotating, a brush bristles provided in a radial manner in an axial cross section with a circumferential interval from the peripheral surface of the rotary shaft, and a brush bristle extension mechanism for extending the brush radius. The brush bristle extending mechanism is a cleaning brush in which a retaining body that retains the root of the bristle on its side is detachably fixed to the peripheral surface of the rotating shaft in advance.

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