JP4115382B2 - Vacuum cleaner inlet and vacuum cleaner with the same - Google Patents

Description

  The present invention relates to a suction port body of a vacuum cleaner having a rotating brush and a vacuum cleaner including the same.

  As a conventional vacuum cleaner or a suction inlet used for it, there exist some which were indicated by patent documents 1-4, for example. These will be briefly described as follows.

  In Patent Document 1, the cleaning body constituting the rotary rotor is provided with a loop pile portion in which a loop is formed in a cross section perpendicular to the rotation axis of the cleaning body, whereby the cleaning body is entangled with fiber dust and the like. A floor nozzle for a vacuum cleaner is disclosed.

  Further, in Patent Document 2, a single rotating brush is provided with a blade portion for scooping up dust such as carpets and a brush portion for cleaning and wiping wooden floors, etc., so that the rotating brush is not replaced. A mouthpiece of an electric vacuum cleaner capable of cleaning a carpet or a wooden floor is disclosed.

  Further, Patent Document 3 discloses a cleaning equivalent to the case where a house detergent is used by preliminarily sucking dust and dirt on the floor surface, dispersing oil and fat stains on the floor surface with alkaline ionized water, and wiping with a roller. An electric vacuum cleaner capable of obtaining an effect is disclosed.

  Further, in Patent Document 4, a plurality of brush yarns fixed to a base fabric used for a rotating brush are constituted by crimped yarns having an irregular cross-sectional shape, and the ends of the crimped yarns are formed in a substantially spherical shape. A vacuum cleaner suction tool is disclosed. In this configuration, the cleaning of the wooden floor increases the dust collection effect of the narrow gap at the end of the crimped yarn, while the cleaning of the carpet hooks the fibrous dust with the substantially spherical portion of the hair tip, The flexibility is used to improve the dust collection effect.

  Conventionally, for example, a suction port 100 of a vacuum cleaner as shown in FIG. 21 is also known. The suction port body 100 includes a suction port 101 for sucking air at a bottom surface position facing the floor surface, and a rotary brush 102 is provided in the suction port 101. The rotating brush 102 includes a rotating body 103, two straight brushes 104 and two blades 105 supported by the rotating body 103.

  In the straight brush 104, one end of each brush thread is fixed to a base cloth. Each brush thread has a straight or crimped shape, and is made of a soft resin such as nylon or polypropylene so as to avoid damage to the floor surface (particularly the flooring). Further, the blade 105 effectively scrapes dust on the carpet, and is made of an elastic material such as rubber, for example.

  The blade 105 is normally supported by the rotating body 103 so as to be separated from the floor surface (for example, the surface of a tatami mat or flooring). However, when the floor surface is a carpet, the carpet has a hair height. As a result, the carpet surface and the blade 105 come into contact with each other. Thereby, when the floor surface is tatami flooring or flooring, damage to the floor surface by the blade 105 can be avoided.

  Further, on the bottom surface of the suction port body 100, a brush row body 106 made of brush material yarns is provided at a rear position of the rotary brush 102 with respect to the traveling direction of the suction port body 100. The brush array 106 performs auxiliary cleaning of the floor surface in addition to cleaning by the rotating brush 102 by simultaneously contacting the floor surface when the suction port body 100 moves along the floor surface.

In the above configuration, when an electric blower incorporated in a cleaner body (not shown) is driven, air is sucked from the suction port 101 of the suction port body 100. At this time, dust such as floor dust, dust, lint, hair, sand and the like is scraped up by the suction port 101 by the rotation of the blade 105 and the straight brush 104 accompanying the rotation of the rotating body 103 of the rotating brush 102. At the same time, the floor is wiped and polished. Then, the scraped up dust is sucked together with air and removed by the dust collecting device of the cleaner body.
JP 2002-517 A (published on January 8, 2002) JP-A-6-14853 (published January 25, 1994) JP 10-57282 A (published March 3, 1998) JP 2003-210366 A (published July 29, 2003)

  However, the conventional rotating brush described above has a configuration in which each brush thread is in line contact with the dust on the floor surface along the rotation direction of the rotating brush, so that the dust is removed, as shown in FIG. When the oil and fat 121 having a smooth surface is present on the floor surface, even if the rotating brush rotates, each brush thread 122 cannot scrape the oil and fat 121 and thins the oil and fat 121 thinly. Only. That is, with the conventional rotating brush, the oil 121 on the floor surface could not be wiped off reliably.

  The present invention has been made in order to solve the above-described problems, and its purpose is to ensure that oil and dirt on the floor surface is reliably set by appropriately setting the shape of each brush thread constituting the rotating brush. An object of the present invention is to provide a suction port body of a vacuum cleaner that can be wiped off, and a vacuum cleaner including the same.

  According to the present invention, the rotating body has the support portion that supports the brush portion. This support part is formed along the line which connects the point on each circumference of the both end surfaces which pinch | interpose the surrounding surface of a rotary body on the said surrounding surface. Therefore, a support part may be formed, for example so that the rotating shaft of a rotary body may be followed, and may be formed so that it may be twisted in the rotation direction of a rotary body. As the rotating body rotates, the brush portion supported by the support portion rotates.

  Here, the brush portion is formed in a loop shape by fixing both ends of each brush yarn to the base fabric so that a line connecting both ends of each brush yarn is along the forming direction of the support portion. Has a loop brush. In such a loop brush, no matter what direction the support portion is formed on the circumferential surface of the rotating body (whether the support portion is formed along the rotation axis or twisted in the rotation direction, it may be formed) ) Since the loop part of each brush thread crosses the rotating direction of the rotating body, when the rotating body is rotated, the surface forming the loop of each brush thread rotates while crossing the rotating direction of the rotating body. To do. In addition, the brush portion is a loop in which each brush yarn is formed in a loop shape by fixing both ends of each brush yarn to the base fabric so that a line connecting both ends of each brush yarn is along the rotation axis direction of the rotating body. The same can be said for the case of having a brush. As a result, even if oils and fats adhere to the floor surface, the oils and fats can be reliably scraped off at the loop portion as if scraped off at the loop surface of the loop brush. As a result, the oil on the floor can be wiped off reliably.

  In addition, the following structures may be sufficient as the suction inlet body of the vacuum cleaner of this invention, and a vacuum cleaner provided with the same.

  That is, the suction port body of the vacuum cleaner of the present invention is the above-described suction port body, wherein the brush portion further includes a straight brush in which only one end of each brush thread is fixed to a base cloth supported by the support portion. The length of the straight brush in the rotational radius direction is such that the maximum rotational radius of the straight brush is not less than a value obtained by adding 1 mm to the distance from the center of the rotation axis of the rotating body to the floor surface, and The structure set so that it may become below the value which added 2 mm to the said distance may be sufficient.

  The suction port body of the electric vacuum cleaner of the present invention further includes a housing that reciprocates in the direction perpendicular to the rotation axis of the rotating body while accommodating the rotating body in the suction port body described above, and the brush The portion further includes a straight brush in which only one end of each brush thread is fixed to the base fabric supported by the support portion, and the length of the straight brush in the radial direction of rotation is determined when the rotating body rotates. The straight brush may be configured to be in contact with a casing wall portion located on one moving direction side with respect to the rotating body.

  The suction port body of the vacuum cleaner of the present invention is the above-described suction port body, wherein the length of the straight brush in the radial direction of rotation is such that the maximum rotational radius of the straight brush is from the center of the rotation axis of the rotary body. It may be configured to be equal to or larger than the value obtained by adding 1 mm to the distance to the housing wall and equal to or smaller than the value obtained by adding 2 mm to the distance.

  The suction port body of the vacuum cleaner of the present invention is the above-described suction port body, wherein the length of the loop brush in the radial direction of rotation is such that the maximum rotational radius of the loop brush is from the center of the rotation axis of the rotary body. The structure set so that it may become shorter than the distance to a body wall part may be sufficient.

  In the suction port body of the vacuum cleaner of the present invention, in the suction port body described above, the support portion is configured so that the loop brush and the straight brush alternately contact the floor surface by the rotation of the rotating body. The structure which supports the said loop brush and the said straight brush may be sufficient.

  The suction port body of the vacuum cleaner of the present invention is the suction port body described above, wherein the rotating body is a contact amount between the housing wall portion located on one moving direction side with respect to the rotating body and the straight brush. May be configured to be supported by the casing so that the contact amount between the floor surface and the straight brush is 1 mm or more and 2 mm or less.

  The suction port body of the vacuum cleaner of the present invention is the above-described suction port body, wherein the rotating body has a contact amount between the housing wall portion and the straight brush of 1.5 mm, and the floor surface and the straight body. A configuration may be adopted in which the housing is pivotally supported so that the amount of contact with the brush is 1.4 mm.

  The vacuum cleaner of the present invention may be configured to include the above-described suction port body and an electric blower that sucks air containing dust from the suction port body.

  According to the present invention, the brush portion is formed along the line connecting the ends of each brush thread, the point on each circumference of both end faces sandwiching the peripheral surface of the rotating body on the peripheral surface. A loop brush in which each brush thread is formed in a loop shape is provided by fixing both ends of each brush thread to the base fabric so as to follow the forming direction of the support portion. Thereby, no matter what direction the support part is formed on the circumferential surface of the rotating body, the loop portion of each brush thread is formed so as to cross the rotational direction of the rotating body. The surface on which the loop of each brush thread is formed rotates while traversing the rotating direction of the rotating body. As a result, even if oils and fats adhere to the floor surface, the oils and fats can be reliably scraped off at the loop portion as if scraped off at the loop surface of the loop brush. As a result, the oil and fat on the floor surface can be reliably wiped off.

[Embodiment 1]
An embodiment of the present invention will be described below with reference to FIGS.

  FIG. 2 shows a schematic configuration of the electric vacuum cleaner according to the present embodiment. The above vacuum cleaner has a vacuum cleaner body 1, an extension pipe 2, and a suction port body 3.

  The vacuum cleaner body 1 includes an electric blower and a dust collector (not shown). The electric blower sucks air through the suction port 5 (see FIG. 3) of the suction port body 3. The dust collector is composed of, for example, a paper pack or a filter, and removes dust, sand, and other dust contained in the sucked air.

  The extension pipe 2 is a communication path for guiding the air sucked from the suction port body 3 to the cleaner body 1.

  As shown in FIG. 3, the suction port body 3 includes a housing 4, a suction port 5, and a brush row body 6.

  The housing 4 is a housing for housing a rotating brush 11 (rotating body 13), which will be described later, and is made of, for example, ABS resin (acrylonitrile / butadiene / styrene copolymer). The casing 4 can reciprocate in parallel to the floor surface in a direction perpendicular to the rotation axis of the rotating brush 11 (rotating body 13) (front and rear), whereby the rotating brush 11 ( The rotating body 13) is reciprocated in the vertical direction. Moreover, the housing | casing 4 has the front wall 4a (housing | casing wall part) located ahead with respect to the rotary body 13, ie, the one movement direction side of the housing | casing 4, and mentions this front wall 4a later. The straight brush 22 is in contact.

  The suction port 5 is an opening provided on the bottom surface of the housing 4 that faces the floor surface, and air is sucked from the suction port 5 together with dust on the floor surface. Therefore, it can be said that the casing 4 has a suction port 5 that moves on the floor surface and sucks in air containing dust. The rotating brush 11 is arranged so as to be rotatable at the suction port 5. In addition, said floor surface generically points out surfaces, such as a carpet, a tatami mat, a wooden floor (flooring), for example.

  The brush array 6 is provided on the bottom surface of the housing 4 on the side opposite to the front wall 4 a with respect to the suction port 5. This brush array 6 is made of, for example, a brush material thread such as nylon, and when the suction port body 3 moves along the floor surface, simultaneously with the floor surface, cleaning with the rotary brush 11, Perform auxiliary cleaning of the floor.

  In the above configuration, when the electric blower built in the cleaner body 1 is driven, air is sucked from the air suction port of the suction port body 3. At this time, dust such as dust, dust, lint, hair, sand, etc. on the floor surface is scraped up and sucked together with air by the rotation of the rotating brush 11 inside the suction port body 3 and extended. It is sent to the dust collector of the cleaner body 1 through the pipe 2. And the dust in the sucked air is removed by this dust collector.

  Next, the above rotating brush 11 will be described. FIG. 1 shows a schematic configuration of the rotating brush 11. The rotating brush 11 includes a brush part 12 and a rotating body 13. The rotating body 13 supports the brush portion 12. Hereinafter, first, the brush part 12 will be described.

  The brush part 12 has a plurality of brush threads fixed to the base cloth, and cleans the floor surface by the rotation of the rotating body 13. In the present embodiment, the two first brush parts 21 and the two brush parts are cleaned. The second brush portion 31 is configured. In addition, the number of the 1st brush parts 21 and the 2nd brush parts 31 is not necessarily limited to said number.

  The 1st brush part 21 is comprised by the straight brush 22 which fixed only the end of each brush thread 22a to the base fabric 22b. Each brush thread 22a is made of a soft resin such as nylon or polypropylene to avoid damaging the floor surface.

  In the present embodiment, the length of the straight brush 22 in the rotational radius direction is set so that the straight brush 22 contacts the front wall 4a when the rotating body 13 rotates. That is, the length of the straight brush 22 in the rotational radius direction is set so that the maximum rotational radius of the straight brush 22 is equal to or greater than the distance from the center of the rotational axis of the rotating body 13 to the front wall 4a.

  By setting the length of the straight brush 22 in the radial direction of rotation, when the rotating body 13 rotates, the tip of each brush thread 22a of the straight brush 22 contacts the front wall 4a, and the friction at this time As a result, the front wall 4a is negatively charged, for example. As a result, dust existing near the front wall 4a (for example, near the floor surface) is electrostatically adsorbed on the surface of the front wall 4a. Therefore, after that, the dust adsorbed on the front wall 4a can be sucked together by the electric blower in the cleaner body 1. That is, it becomes possible to attract and collect dust at the lower portion of the suction port body 3 by static electricity generated on the front wall 4a. As a result, the dust removal efficiency near the floor can be improved with certainty. The details of setting the length of the straight brush 22 in the rotational radius direction based on the amount of static electricity generated on the front wall 4a will be described later.

  Next, the 2nd brush part 31 is demonstrated. The second brush portion 31 includes a loop brush 32 and a blade 33.

  As shown in FIG. 4, the loop brush 32 has both ends of each brush thread 32a fixed to the base cloth 32b in a loop shape. On the base cloth 32b, a line connecting both ends of each brush thread 32a is All are along one direction (lateral direction in FIG. 4). Each brush thread 32a is made of a soft resin such as nylon or polypropylene in order to avoid damaging the floor surface. The base fabric 32b is made of a stretchable material such as nylon or polyurethane.

  The blade 33 sandwiches the loop brush 32 and is made of an elastic body such as rubber. The loop brush 32 is supported by the rotating body 13 by the blade 33 being supported by a support portion 41 b described later of the rotating body 13. The blade 33 also has a function of scooping up dust on the carpet, for example, by hitting the carpet surface. Further, since the blade 33 has elasticity, the blade 33 can absorb an impact when the loop brush 32 held between the blades 33 comes into contact with the floor surface. The load can be reduced.

  The second brush portion 31 is the most characteristic part of the present invention, and details thereof will be described later.

  Next, the rotating body 13 will be described. The rotating body 13 rotates while supporting the brush portion 12 around a rotation axis positioned parallel to the floor surface, and includes a support portion 41 that supports the brush portion 12. That is, the rotating body 13 has a brush thread having a predetermined length and is rotatably supported in the housing 4.

  More specifically, the support portion 41 includes a support portion 41 a that supports the first brush portion 21 and a support portion 41 b that supports the second brush portion 31. The support portions 41a and 41b need only be provided in a number corresponding to the number of the first brush portions 21 and the second brush portions 31. Therefore, in the present embodiment, two support portions 41a and two support portions are provided. 41b is provided on the rotating body 13.

  The support portion 41 is a groove formed along a line connecting points on each circumference of both end faces sandwiching the circumferential surface of the rotating body 13 on the circumferential surface. The 1st brush part 21 is directly supported by the support part 41a because the base fabric 22b is inserted in the support part 41a. On the other hand, the second brush portion 31 is supported by the support portion 41b by inserting the blade 33 holding the loop brush 32 into the support portion 41b.

  The support portions 41a and 41b may be formed along the rotation axis of the rotator 13 as long as they are formed along the peripheral surface of the rotator 13 over the entire rotation axis direction. It may be formed to be twisted in the 13 rotation directions.

  Further, the support portions 41 a and 41 b are alternately provided at equal intervals in the rotation direction of the rotating body 13. Thereby, when the rotating body 13 rotates, each brush thread 22a of the straight brush 22 supported by the support portion 41a and each brush of the loop brush 32 supported by the support portion 41b via the blade 33. The yarn 32a comes into contact with the floor surface alternately. As a result, the above-described charging by the straight brush 22 and the floor surface wiping by the loop brush 32 can be efficiently performed. From this, it can be said that the support part 41 is supporting the brush part 12 so that the straight brush 22 and the loop brush 32 may contact a floor surface by rotation of the rotary body 13 alternately.

  Next, the detail of the 2nd brush part 31 is demonstrated. First, details of the blade 33 will be described.

  FIG. 5 is a cross-sectional view of the blade 33 when the blade 33 is cut along a plane perpendicular to the rotation axis of the rotating body 13. The blade 33 includes a first support portion 33a, a second support portion 33b, and a third support portion 33c. The 1st support part 33a and the 2nd support part 33b hold and support the loop brush 32 (refer FIG. 1), and the 1st support part 33a is in the loop brush 32 (holding position of the loop brush 32). On the other hand, the second support portion 33b is located on the downstream side in the rotational direction with respect to the loop brush 32 (the sandwiching position of the loop brush 32) while being located on the upstream side in the rotational direction of the rotating body 13.

  End portions of the first support portion 33a and the second support portion 33b are connected to each other, and the connection portion is connected to the third support portion 33c. The third support portion 33c supports the first support portion 33a and the second support portion 33b, and has a cross-sectional shape substantially along the inner wall of the support portion 41b of the rotating body 13. Thus, the third support portion 33c can be inserted into the support portion 41b of the rotating body 13, and the entire blade 33 is supported by the rotating body 13 through the support portion 41b by such insertion. Become. Further, the first support portion 33 a, the second support portion 33 b, and the third support portion 33 c have a length corresponding to the entire formation direction of the support portion 41 b along the peripheral surface of the rotating body 13.

  Moreover, the length along the rotation radial direction of the loop brush 32 in the 1st support part 33a and the 2nd support part 33b is set as follows. That is, the length of the first support portion 33a along the rotational radius direction of the loop brush 32 is set so that the maximum rotation radius of the first support portion 33a is smaller than the maximum rotation radius of the second support portion 33b. Yes. In addition, the length of the second support portion 33 b along the rotational radius direction of the loop brush 32 is set so that the maximum rotational radius of the second support portion 33 b is smaller than the maximum rotational radius of the loop brush 32.

  According to the former setting, when the loop brush 32 rotates with the rotation of the rotating body 13 and the tip of the loop comes into contact with the floor surface, the tip of the loop may be released to the upstream side in the rotation direction of the rotating body 13. it can. In this case, the load applied to the tip of the loop can be reduced, the wear thereof can be reduced, and the durability of the loop brush 32 can be improved. In addition, since the contact area between the loop brush 32 and the floor surface increases as the tip of the loop escapes upstream in the rotational direction, the effect of wiping the floor surface can be significantly improved. it can.

  Further, according to the latter setting, when the floor surface is, for example, a flat flooring or a tatami mat, the loop brush 32 contacts the floor surface, and the blade 33 does not contact the floor surface. On the other hand, when the floor surface is, for example, a carpet, the carpet surface and the second support portion 33b of the blade 33 come into contact with each other because the carpet is fluffy, so that dust on the carpet can be knocked out. Therefore, when the floor surface is other than the carpet, it is possible to avoid the floor surface from being damaged by the contact of the blade 33. On the other hand, when the floor surface is a carpet, the blade 33 can reliably clean the carpet.

  In addition, the surface on the downstream side in the rotation direction of the rotating body 13 at the tip of the second support portion 33b (the end opposite to the connection side with the first support portion 33a) is a rough surface on which fine irregularities are formed. It has become. When the rotating body 13 rotates, before the loop brush 32 comes into contact with the floor surface (for example, a carpet), the second support portion 33b of the blade 33 on the downstream side in the rotational direction comes into contact with the floor surface. However, since the surface of the second support portion 33b is rough, dust on the carpet can be reliably knocked out on the surface, and the dust removal effect can be improved.

  Next, the loop brush 32 which is the most characteristic part of the present invention will be described.

  As shown in FIG. 4, the loop brush 32 is configured such that both ends of each brush thread 32a are fixed on the base cloth 32b along one direction so that each brush thread 32a is looped on the base cloth 32b. As shown in FIG. 6, when being held between the blades 33, as shown in FIG. 6, the back surface of the base fabric 32b opposite to the fixing surface of each brush thread 32a is opposed to each other. The base cloth 32b is bent along a line connecting both ends of the brush thread 32a and is sandwiched by the blade 33.

  In order to securely support the loop brush 32 with the blade 33, the loop brush 32 and the blade 33 may be sewn as shown in FIG.

  When the loop brush 32 is clamped by the blade 33 in such a state, a line connecting both ends of each brush thread 32a of the loop brush 32 corresponds to the entire formation direction of the support portion 41b along the peripheral surface of the rotating body 13. The third support portion 33c of the blade 33 having a length in one direction is along the one direction. Accordingly, when the third support portion 33c of the blade 33 is inserted into the support portion 41b while the loop brush 32 is held, a line connecting both ends of each brush thread 32a of the loop brush 32 forms the support portion 41b of the rotating body 13. Along the direction. Therefore, in this state, the loop brush 32 fixes each brush thread 32a by fixing both ends of each brush thread 32a to the base cloth 32b so that a line connecting both ends of each brush thread 32a is along the forming direction of the support portion 41b. It can be said that 32a is formed in a loop shape.

  In this case, on the peripheral surface of the rotator 13, whether the support portion 41 b is formed along the rotation axis or twisted in the rotation direction, the loop portion of each brush thread 32 a is It will be located across the direction of rotation. Therefore, when the rotating body 13 is rotated in this state, the surface of the loop brush 32 forming the loop of each brush thread 31a rotates while crossing the rotating direction of the rotating body 13, as shown in FIG. In addition, even if the oil / fat 14 adheres to the floor surface, the oil / fat 14 can be scraped off like a spatula on the loop surface of the loop brush 32. Therefore, according to the configuration of the rotating brush 11 of the present embodiment, the oil 14 can be scraped off efficiently and reliably at the loop portion of the loop brush 32.

  Here, in order for the loop brush 32 to contact the floor surface, it is at least necessary that the maximum rotation radius of the loop brush 32 is equal to or more than the distance from the center of the rotation axis of the rotating body 13 to the floor surface. On the other hand, if the maximum turning radius is larger than the value obtained by adding 2 mm to the distance, the loop brush 32 is worn and damaged due to friction between the loop brush 32 and the floor surface, and the durability of the loop brush 32 is deteriorated. It has been confirmed.

  Therefore, the length of the loop brush 32 in the rotational radius direction is a value in which the maximum rotational radius of the loop brush 32 is not less than the distance from the center of the rotation axis of the rotating body 13 to the floor surface, and 2 mm is added to the above distance. It is desirable to set the following. Thereby, the effect of scraping off the oil 14 on the floor surface by the loop brush 32 can be obtained while maintaining the durability of the loop brush 32 to some extent.

  The length of the loop brush 32 in the rotational radius direction is preferably set so that the maximum rotational radius of the loop brush 32 is shorter than the distance from the center of the rotational axis of the rotating body 13 to the front wall 4a. . Thereby, it is possible to avoid the hair tip of the loop brush 32 from being worn and damaged due to contact with the front wall 4a, and to use the loop brush 32 as a brush dedicated to scraping the oil 14 on the floor surface. . In this case, since the rotating body 13 can be rotated so that only the tip of the straight brush 22 touches the front wall 4a, the straight brush 22 can be used as a brush exclusively for charging the front wall 4a. Become. In addition, since the maximum rotation radius of the loop brush 32 is smaller than the maximum rotation radius of the straight brush 22, the loop brush 32 can be protected and tangling of the yarn on the carpet or the hair to the loop brush 32 can be prevented. can do.

  In addition, the straight brush 22 is conventionally used for floor wiping (especially flooring), but in this embodiment, such a floor wiping function is a loop brush. 32, the straight brush 22 can have the above-described function, that is, a function different from the conventional function of electrostatically adsorbing dust on the front wall 4a by charging the front wall 4a. In other words, the rotating brush 11 of the present embodiment has the loop brush 32 that exhibits a great effect on floor wiping, and thus, the straight brush 22 that has been conventionally used for floor wiping. Can be used as a brush exclusively for charging the front wall 4a.

  Next, details of setting the length of the straight brush 22 in the rotational radius direction will be described.

  In the present embodiment, (1) the amount of contact of the straight brush 22 with respect to the front wall 4a (the amount of overlap between the straight brush 22 and the front wall 4a when each brush thread 22a is assumed to be a straight line) is changed. , How much the static electricity (kV) generated at the front wall 4a changes at that time, (2) the amount of contact of the straight brush 22 against the floor of the hair tip (the straight brush when each brush thread 22a is assumed to be a straight line) The amount of dust removal (%) at that time is changed, and the length of the straight brush 22 in the rotational radius direction is determined based on the results. Set.

  The experimental method (1) is as follows. That is, after neutralizing the front wall 4a and the suction port 5 with a static elimination brush, the amount of contact of the straight brush 22 with respect to the front wall 4a is changed in three ways, and in each case, the rotary brush 11 is rotated for 1 minute, Static electricity was measured with a static electricity measuring device at a distance of 5 cm from 4a. FIG. 8 shows the relationship between the amount of contact (mm) of each brush thread 22a with the front wall 4a and the value of static electricity (kV) generated at the front wall 4a at that time, and FIG. 9 shows the measurement results thereof. The relationship between the above is graphed based on the above.

  In the experiment (2), dust removal was measured by the method specified in “Method for measuring performance of household vacuum cleaner” in JIS (Japanese Industrial Standards) C9802. Dust removal is the percentage of the amount of dust removed during a specified cleaning cycle and the amount of dust spread over the test range, i.e. (removed at a specified number of times. Amount of dust / amount of dust dispersed) × 100. FIG. 10 is a graph showing the relationship between the contact amount (mm) of each brush yarn 22a with the floor surface and the dust removal at that time.

  From the results of FIG. 9, when the contact amount between the straight brush 22 and the front wall 4a is 1 mm or more and 2 mm or less, a sufficient amount of static electricity is generated to adsorb at least 0.4 kV of dust. Accordingly, the length of the straight brush 22 in the rotational radius direction is such that the hit amount is 1 mm or more and 2 mm or less, that is, the maximum rotational radius of the straight brush 22 is from the center of the rotating shaft of the rotating body 13 to the front wall 4a. It can be said that it is desirable to set it to be equal to or greater than the value obtained by adding 1 mm to the distance up to and less than the value obtained by adding 2 mm to the distance. Thereby, sufficient static electricity can be generated on the front wall 4a, and the dust removal efficiency can be reliably improved. In particular, when the hit amount is 1.5 mm, it can be said that the effect can be maximized from the result of FIG.

  At this time, considering that the loop brush 32 is not in contact with the front wall 4a and the contact amount between the straight brush 22 and the front wall 4a is 2 mm at the maximum, the length of the straight brush 22 in the rotational radius direction and the loop brush The difference between the length 32 in the rotational radius direction is 1 mm or more and 2 mm or less (where the maximum rotational radius of the straight brush 22> the maximum rotational radius of the loop brush 32).

  Further, from the result of FIG. 10, when the contact amount between the straight brush 22 and the floor surface is 1 mm or more and 2 mm or less, the dust removal is close to the peak (73.5%), and the dust removal effect is high. I understand that. Accordingly, the length of the straight brush 22 in the rotational radius direction is such that the hit amount is 1 mm or more and 2 mm or less, that is, the maximum rotational radius of the straight brush 22 is from the center of the rotating shaft of the rotating body 13 to the floor surface. It can be said that it is desirable that the distance is set to be not less than the value obtained by adding 1 mm to the distance and not more than the value obtained by adding 2 mm to the distance. Thereby, the high dust removal effect by the rotation brush 11 whole can be acquired. In particular, when the hit amount is 1.4 mm corresponding to the dust removal peak (73.5%), it can be said that the effect can be obtained to the maximum from the result of FIG.

  From the above, the contact amount between the front wall 4a and the straight brush 22 is 1 mm or more and 2 mm or less (preferably 1.5 mm), and the contact amount between the floor surface and the straight brush 22 is 1 mm or more and 2 mm or less (preferably 1.4 mm), if the rotating body 13 (or the rotating brush 11) is pivotally supported by the housing 4, sufficient static electricity is generated for dust removal, and dust on the floor surface is surely secured. It can be said that it can be removed.

  In addition, it is good also as a structure which can adjust the amount of hits of the straight brush 22 and a floor surface according to the use progress of the straight brush 22. FIG. For example, (1) The rotating shaft of the rotating body 13 (or rotating brush 11) can be adjusted in the vertical direction, and when the straight brush 22 is worn, the rotating shaft is moved in a direction approaching the floor surface, The hit amount may fall within the appropriate range described above. (2) The height position of the wheel for moving the suction port 3 along the floor surface can be adjusted in the vertical direction, and when the straight brush 22 is worn, the position of the wheel is moved from the floor surface. By raising the distance, the distance between the straight brush 22 and the floor surface may be relatively shortened, so that the hit amount falls within the appropriate range described above.

  By the way, in the loop brush 32 of the present embodiment, when the blade 33 holding the loop brush 32 is inserted into the support portion 41b of the rotating body 13, the line connecting both ends of each brush thread 32a is in the forming direction of the support portion 41b. However, when the blade 33 is inserted into the support portion 41 b, a line connecting both ends of each brush thread 32 a may be along the rotation axis direction of the rotating body 13. That is, the loop brush 32 loops each brush thread 32a by fixing both ends of each brush thread 32a to the base cloth 32b so that a line connecting both ends of each brush thread 32a is along the rotation axis direction of the rotating body 13. It may be formed in a shape.

  For example, the loop brush 32 bends the base fabric 32b so that the fold of the base fabric 32b is inclined with respect to the fold of FIGS. This can be realized by sandwiching with. In this case, when the base cloth 32b is bent and held by the blade 33, a line connecting both ends of each brush thread 32a in the base cloth 32b is a longitudinal direction of the blade 33 corresponding to the forming direction of the support portion 41b. Although the blade 33 is inserted into the support portion 41 b twisted in the rotation direction of the rotating body 13, the line connecting both ends of each brush thread 32 a in the base cloth 32 b is along the rotation axis direction of the rotating body 13. become. In the case of the loop brush 32 having this configuration, the surface of each loop yarn 32a of the loop brush 32 that rotates with the surface forming the loop being completely perpendicular to the rotating direction of the rotating body 13 rotates. The maximum scraping effect can be obtained.

  In the present embodiment, the first brush portion 21 is configured by the straight brush 22, but may be configured by a blade for knocking out dust on the carpet instead of the straight brush 22. If the effect of scraping dust on the carpet is desired more strongly than the charging effect described above by the straight brush 22, this configuration may be used.

  As the diameter of each brush thread 32a of the loop brush 32 is reduced, the scraping performance of the oil 14 on the floor surface is improved, but the durability is reduced (the damage due to friction with the floor surface becomes severe). ). Therefore, the diameter of each brush thread 32a may be set in consideration of the balance between scraping performance and durability. Further, the density of each brush thread 32a may be set in consideration of the durability of each brush thread 32a.

  The brush array 6 (see FIG. 3) provided on the bottom surface of the suction port body 3 may be configured by the loop brush 32 described above. In this case, each brush thread 32a is arranged so that the loop surface of the loop brush 32 crosses the moving direction of the suction port 3, that is, the line connecting both ends of each brush thread 32a is along the rotational axis direction of the rotating body 13. What is necessary is just to attach the loop brush 32 which fixed both ends to the base fabric 32b to the bottom face of the suction inlet 3.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIGS. 11 to 15A and 15B. In addition, the same member number is attached to the same structure as Embodiment 1, and the description is abbreviate | omitted.

  The present embodiment is the same as the first embodiment except that the second brush portion 31 (see FIGS. 1 and 6) of the first embodiment is replaced with the second brush portion 51 shown in FIG. As shown in FIG. 11, the second brush portion 51 includes the loop brush 32 used in the first embodiment and a blade 52 (elastic body).

  The blade 52 supports the loop brush 32, and is connected to the first support portion 52a to which the loop brush 32 is attached, and the first support portion 52a, and can be inserted into the support portion 41b of the rotating body 13. And a second support portion 52b formed with a simple cross-sectional shape. By inserting the second support portion 52b of the blade 52 into the support portion 41b of the rotating body 13, the entire blade 52 is supported by the rotating body 13 via the support portion 41b.

  Further, the first support part 52 a and the second support part 52 b have a length corresponding to the entire formation direction of the support part 41 b along the peripheral surface of the rotating body 13. As a result, when the second support portion 52b of the blade 52 is inserted into the support portion 41b of the rotating body 13, the first support portion 52a of the blade 52 extends over the entire region in the formation direction of the support portion 41b of the rotating body 13. It protrudes from the peripheral surface. Therefore, it can be said that the blade 52 is provided so as to protrude from the peripheral surface of the rotating body 13 over the entire region in which the support portion 41b is formed.

  In the present embodiment, as shown in FIG. 12, the loop brush 32 covers each surface of the blade 52 on the upstream side and the downstream side in the rotational direction of the rotating body 13 via the tip portion 53 that is the protruding tip of the blade 52. Further, the back surface of the base fabric 32 b of the loop brush 32 opposite to the fixed surface of each brush thread 32 a is attached to the blade 52. At this time, the loop brush 32 is affixed to the blade 52 in a state where the base cloth 32b is bent along a line connecting both ends of the arbitrary brush thread 32a. Note that the above-described pasting may be performed by sewing, or may be performed using an adhesive.

  Even when the second brush portion 51 is configured in this way, when the loop brush 32 is attached to the blade 52, the line connecting both ends of each brush thread 32 a of the loop brush 32 is supported along the peripheral surface of the rotating body 13. The second support portion 52b of the blade 52 having a length corresponding to the entire formation direction of the portion 41b in one direction is along the one direction. Therefore, when the second support portion 52b of the blade 33 with the loop brush 32 attached to the first support portion 52a is inserted into the support portion 41b, a line connecting both ends of each brush thread 32a of the loop brush 32 is formed on the rotating body 13. It comes to follow the formation direction of the support part 41b.

  Therefore, when the rotating body 13 is rotated in this state, the surface of the loop brush 32 that forms the loop of each brush thread 31a rotates while crossing the rotation direction of the rotating body 13, so that Embodiment 1 Similarly, the oil on the floor surface can be scraped off efficiently and reliably like a spatula at the loop portion of the loop brush 32.

  Next, in the present embodiment, an experiment for testing the floor cleaning effect was performed by changing the configuration of the rotating brush 11 in various ways. FIG. 13 shows the experimental results for each specification of the rotating brush 11.

  Lot No. 1 is the same as a conventional rotating brush consisting of two straight brushes and two blades. Lot No. 2 and Lot No. 3 are two first brush sections. This is a rotating brush 11 of this embodiment having 21 (straight brush 22) and two second brush portions 51 (loop brush 32 + blade 52). However, the maximum rotation radii of the loop brush 32 and the blade 52 are different between the lot No. 2 and the lot No. 3. Lot No. 4 is a rotating brush having two blades and two second brush portions 51 (loop brush 32 + blade 52). In addition, the loop brush 32 of lot No. 2-lot No. 4 used the thing whose bristle height (height from the base fabric 32b of each brush thread 32a) is 4 mm. Further, “φ” in the figure indicates the rotation diameter (mm), that is, the maximum rotation radius (mm) × 2.

  The objects to be removed are bills (oil) attached to the blackboard and garbage on the carpet (hair height 7 mm). In the experimental method, the suction port 3 was reciprocated on the blackboard and the carpet while rotating the rotating brush. Further, the current value in the figure is a value of a drive current for rotating the rotary brush. The dust removal is as described in the first embodiment. Further, the operation force indicates a force necessary to move the suction port body 3 forward or backward on the carpet.

  The result of FIG. 13 shows that lot No. 1 has a high dust removal effect (dust removal) on the carpet, but almost no effect on removing the bill on the blackboard. In addition, after reciprocating the lot No.1 rotating brush twice on the blackboard, the two straight brushes are two loop brushes (with a hair height of 6mm, more than the loop brushes of lot No.2 to lot No.4). When the brush was replaced with a rotating brush having a high density of the brush thread 32a and reciprocated once on the blackboard, the bill on the blackboard could be completely wiped off.

  On the other hand, in Lot No. 2 and Lot No. 3, the removal effect of dust on the carpet is lower than that of Lot No. 1, but almost no change. However, it was confirmed that the effect of removing the bills on the blackboard appeared more remarkably than Lot No. 1, although there was some variation in the number of wipes. Further, in lot No. 4, the blackboard bill removal effect was equivalent to lot No. 2 and lot No. 3, and the dust removal effect on the carpet was equivalent to lot No. 1.

  From the above results, it can be said that at least lots No. 2 to No. 4 using the loop brush 32 have a higher oil removal effect than lot No. 1 not using the loop brush 32. In particular, in lot No. 4, it can be said that the oil can be removed while keeping the driving current of the rotating brush 11 low.

  By the way, when the loop brush 32 is wound around the blade 52 to form the second brush portion 51 as in the present embodiment, the back surface of the base cloth 32b of the loop brush 32 and the tip end portion of the blade 52 are shown in FIG. The loop brush 32 may be affixed to the blade 52 so that a predetermined space is formed between the blade 52 and the blade 52. In this case, an impact when the loop brush 32 hits the floor surface can be absorbed in the predetermined space, and damage to the loop brush 32 can be reduced.

  In addition, since the predetermined space is provided, when the loop brush 32 rotates, the loop brush 32 so that the contact portion with the floor surface of the loop brush 32 escapes to the upstream side in the rotation direction of the rotating body 13. 32 can be deformed. Therefore, when the loop brush 32 is deformed in this way, the loop brush 32 comes into surface contact with the floor surface, and the effect of wiping the floor surface with the loop brush 32 can be further enhanced.

  Next, in the present embodiment, an experiment on durability of the loop brush 32 was performed using the second brush unit 51 illustrated in FIG. 11 and the second brush unit 51 illustrated in FIG. 14. FIGS. 15A and 15B show experimental results on the durability of the loop brush 32 when the objects to be cleaned are flooring and carpet, respectively.

  The lot No. 5 has a second brush portion 51 (see FIG. 11) in which the loop brush 32 is attached to the blade 52 so that no space is formed between the back surface of the base fabric 32b and the tip portion 53 of the blade 52. ). In addition, lot No. 6 and lot No. 7 are the second brushes in which the loop brush 32 is attached to the blade 52 so that a space is formed between the back surface of the base fabric 32b and the tip portion 53 of the blade 52. It is the rotary brush 11 which has the part 51 (refer FIG. 14). However, the number of rotations of the second brush portion 51 is slightly different between lot No. 6 and lot No. 7, but may be considered as an error range.

  Moreover, in lot No. 5 and lot No. 6, each brush part 31a of the loop brush 32 is comprised with the same fiber (for example, nylon), and the base fabric 32b is comprised with the fiber (for example, nylon + polyurethane) which is easy to stretch. ing. In lot No. 7, each brush portion 31a and base fabric 32b of the loop brush 32 are both made of nylon. The blades 52 of lot No. 5 to lot No. 7 all had a thickness of 0.6 mm.

From the above experiments, the following was found.
(1) When no space is provided between the loop brush 32 and the blade 52, the resistance of the loop brush 32 to the floor surface increases, and the durability of each brush thread 32a of the loop brush 32 deteriorates. On the other hand, when the space is provided, the resistance is reduced, so that the durability of each brush thread 32a is improved.
(2) In Lot No. 5, it is considered that the abrasion of each brush thread 32a has progressed due to the fibers extending by rotation and the strong contact with the floor surface.
(3) Lot No. 5 and Lot No. 6 had a shape with a slightly scattered loop compared to Lot No. 7, so it was difficult to see even if they were worn slightly.
(4) The progress of wear all starts from the contact portion with the floor surface.
(5) There was no hair loss or fraying other than abrasion.

  That is, it can be said that providing the space between the loop brush 32 and the blade 52 provides better durability of the loop brush 32, and using the fibers extending as the base fabric 32b provides better durability of the loop brush 32.

[Embodiment 3]
The following will describe still another embodiment of the present invention with reference to FIGS. In addition, the same member number is attached to the same structure as Embodiment 1 * 2, and the description is abbreviate | omitted.

  This embodiment is the same as the first embodiment except that the second brush portion 31 (see FIGS. 1 and 6) of the first embodiment is replaced with the second brush portion 61 shown in FIG. As shown in FIG. 16, the second brush portion 61 includes the loop brush 32 used in the first and second embodiments and the blade 52 (elastic body) used in the second embodiment. In the embodiment, the method of attaching the loop brush 32 to the blade 52 is different from that of the second embodiment.

  That is, in the present embodiment, as shown in FIG. 16, the loop brush 32 has a fixed surface of each brush thread 32 a on the base cloth 32 b of the loop brush 32 only on the downstream surface of the blade 52 in the rotational direction of the rotating body 13. The back of the opposite side is affixed. FIG. 17 is a perspective view of the second brush portion 61 in which the loop brush 32 is attached to the blade 52 in this manner.

  When forming the second brush portion 61, the line connecting both ends of each brush thread 32a of the loop brush 32 has a length corresponding to the entire formation direction of the support portion 41b along the peripheral surface of the rotating body 13 in one direction. What is necessary is just to affix the loop brush 32 to the braid | blade 52 so that the said 1st direction of the 2nd support part 52b of the braid | blade 52 to have. When the second support portion 52b of the blade 52 is inserted into the support portion 41b of the rotating body 13 in this state, a line connecting both ends of each brush thread 32a of the loop brush 32 is along the forming direction of the support portion 41b of the rotating body 13. It becomes like this.

  On the other hand, the length of the loop brush 32 in the rotational radius direction is such that the maximum rotational radius of the loop brush 32 is set to be equal to or greater than the distance from the center of the rotational axis of the rotating body 13 to the floor surface. When the rotating body 13 to which 61 is attached is rotated, as shown in FIG. 18, the loop brush 32 comes into surface contact at the contact portion with the floor surface while the blade 52 is warped. And in this contact part, the surface which formed the loop of each brush thread | yarn 31a of the loop brush 32 rotates, crossing the rotation direction of the rotary body 13. As shown in FIG.

  Therefore, even when the second brush portion 61 of the present embodiment is used, as in the first embodiment, the oil on the floor surface is scraped efficiently and reliably like a spatula at the loop portion of the loop brush 32. Can be taken. Further, since the loop brush 32 is in contact with the floor surface, the scraping performance of the floor surface can be improved by increasing the contact area.

  By the way, in this embodiment, although the case where the braid | blade 52 which protrudes in a rotation radial direction from the surrounding surface of the rotary body 13 was used, as shown in FIG. 19, from the support side by the support part 41b (refer FIG. 1). Alternatively, the blade 52 that is warped so that the tip 53, which is the protrusion of the blade 52, is positioned upstream of the rotating body 13 in the rotation direction may be used.

  In this case, when the loop brush 32 rotates, the loop brush 32 comes into contact with the floor surface from the beginning, so that the impact when the loop brush 32 hits the floor surface causes the blade 52 to be perpendicular to the peripheral surface of the rotating body 13. It is somewhat relaxed compared to the protruding configuration of FIG. Therefore, damage and wear of the loop brush 32 can be reduced.

  The configuration in which the blade 52 is warped from the beginning as shown in FIG. 19 can be applied to any configuration as long as the loop brush 32 is attached to the blade 52. Of course, the configuration is also applicable to the second embodiment. Can be applied.

[Embodiment 4]
The following will describe still another embodiment of the present invention with reference to FIG. In addition, the same member number is attached to the same structure as Embodiment 1-3, and the description is abbreviate | omitted.

  The present embodiment is the same as the first embodiment except that the second brush portion 31 (see FIGS. 1 and 6) of the first embodiment is replaced with the second brush portion 71 shown in FIG. As shown in FIG. 20, the second brush portion 71 is composed only of the loop brush 32 used in the first to third embodiments. That is, in this embodiment, the blades 33 and 52 used in the first to third embodiments are not used, and the base cloth 32b of the loop brush 32 is directly inserted into the support portion 41b of the rotating body 13, The support portion 41b of the rotating body 13 is configured to directly support the loop brush 32 with its base cloth 32b.

  Here, when the second brush portion 71 is supported by the support portion 41b of the rotating body 13, that is, when the base cloth 32b of the loop brush 32 is inserted into the support portion 41b, both ends of each brush thread 32a of the loop brush 32 are provided. Both ends of each brush thread 32a are fixed to the base cloth 32b so that the line connecting the two lines extends along the direction in which the support portion 41b is formed, and each brush thread 32a has a loop shape.

  Therefore, when the rotating body 13 is rotated, the surface of the loop brush 32 that forms the loop of each brush thread 31a rotates while crossing the rotating direction of the rotating body 13, so that the first to third embodiments can be combined. Similarly, the oil on the floor surface can be scraped off efficiently and reliably at the loop portion of the loop brush 32.

  In the present embodiment, since the loop brush 32 is directly supported by the support portion 41b, the blades 33 and 52 required in the first to third embodiments are not required, and the second brush portion 71 The configuration can be simplified.

[Embodiment 5]
Still another embodiment of the present invention will be described below with reference to FIGS. 23 (a) (b) (c). In addition, the same member number is attached to the same structure as Embodiment 1-4, and the description is abbreviate | omitted.

  In this embodiment, the cross-sectional shape of each brush thread 32a of the loop brush 32 used in the first to fourth embodiments is different from a perfect circle (an irregular cross-sectional shape). Examples of such an irregular cross-sectional shape include a polygonal shape such as a triangular shape shown in FIG. 23A and a quadrangular shape shown in FIG. 23B, and an uneven shape shown in FIG. By configuring each brush thread 32a so as to have such an irregular cross section, at least one edge (striated convex portion) can be formed on the peripheral surface of each brush thread 32a.

  Thus, when each brush thread 32a has an edge on its peripheral surface, when rotating the rotating brush 11 and scraping oil (including dust containing oil) on the floor surface, The edge part of each brush thread 32a becomes easy to bite into fats and oils. Therefore, when the rotary brush 11 rotates, the edge portion of each brush thread 32a functions like a fine spatula, and the oil on the floor surface can be easily and reliably scraped by the loop-shaped brush thread 32a. As a result, the oil scraping performance can be greatly improved, and the efficiency of wiping and cleaning can be greatly improved.

  Further, in this embodiment, the scraping performance can be improved without reducing the diameter of each brush thread 32a by devising the cross-sectional shape of each brush thread 32a, so that the durability of each brush thread 32a is improved. It is also possible to avoid the decrease.

  Further, if the cross-sectional shape of each brush thread 32a is a polygonal shape or an uneven shape, a plurality of edge portions can be reliably formed on the peripheral surface of each brush thread 32a. Thereby, fats and oils can be scraped off more efficiently at the plurality of edge portions.

  By the way, the loop brush 32 of the structure mentioned above may be formed with a textile fabric. In this case, only the bristle height of the brush thread 32a in the loop portion can be easily adjusted in the manufacturing method while the base cloth 32b of the loop brush 32 is kept constant. Moreover, since the manufacturing method is the same as the cut pile normally used for the rotating brush 11, the rotating brush 11 can be comprised easily.

  The loop brush 32 may be formed of a knitted fabric. In this case, the gap between the loop portions can be made dense due to the manufacturing method, and the density can be easily increased. Further, since the base fabric 32b for fixing the base of the loop portion can be processed softer than the woven fabric, it is possible to adjust the hardness of the base fabric 32b over a wide range only by back coating.

  Moreover, it is preferable that the material of each brush thread 32a of the loop brush 32 is an acrylic fiber. The acrylic fiber has innumerable fine fiber grooves unique to it, and a plurality of edges are formed on the peripheral surface of each brush 32a by the fiber grooves. Therefore, by constituting each brush thread 32a with an acrylic fiber, it is possible to obtain a wiping and cleaning effect equivalent to that of a modified cross-section thread using the fiber groove.

  Moreover, each brush thread 32a of the loop brush 32 may be comprised with an ultrafine fiber. If each brush thread 32a is composed of such an ultrafine fiber, the edge portion of each brush thread 32a is easily eroded by oil and fat, and the scraping performance of each brush thread 32a is further improved without significantly reducing its durability. Can be improved.

  Each brush thread 32a can be made of, for example, acrylic fiber or nylon fiber, but the fineness varies depending on the material. The fineness refers to the specific gravity expressed in denier [d] or decitex [dtex]. Incidentally, 1 denier is the weight [g] per 9000 m in the fiber length direction, and 1 dtex is the weight [g] per 10000 m in the fiber length direction. Therefore, the fiber diameter of each brush thread 32a that can obtain the effect of the present embodiment (improvement of scraping performance at the edge portion) as a minimum depends on the cross-sectional shape, but at least depends on the material of each brush thread 32a. It can be said that it is different.

  Considering the above, the maximum width of each brush thread 32a of the loop brush 32 may be set to be different depending on the material of each brush thread 32a. Thereby, the scraping performance at the edge portion of each brush thread 32a can be improved regardless of the material of each brush thread 32a.

  Here, the relationship between the fineness and the fiber diameter will be briefly described below. For example, it is assumed that the cross section of each brush thread 32a is a round cross section. In this case, the fiber diameter R [μm] of each brush thread 32a can be calculated by the following equation.

R = k × √dpf
dpf: Fineness [denier]
k: Constant (11.894 / √ρ)
ρ: True specific gravity [g / cm ³ ]
In the case of acrylic fiber, ρ = 1.15 [g / cm ³ ], in the case of nylon fiber, ρ = 1.14 [g / cm ³ ], and in the case of polyester, ρ = 1. .38 [g / cm ³ ], and in the case of polypropylene, ρ = 0.91 [g / cm ³ ].

  When the fiber diameter R of acrylic fiber 1 denier is calculated based on the above formula, R = 11.09 [μm], and when the fiber diameter R of nylon fiber 1 denier is calculated, R = 11.14 [μm]. Become. By the way, the average thickness of Japanese hair is said to be 0.08 mm, and it can be seen that both fibers are quite thin at 1 denier. When the fineness dpf is calculated by decitex, the value of the constant k is k = 11.284 / √ρ.

  For example, the fiber diameter R of the nylon fiber 2.75 denier having a round cross section is R = 18.6 [μm], but when the cross section of each brush thread 32a is an irregular cross section as in this embodiment, for example, By setting the fineness so that the fiber diameter R is smaller than the above value, the scraping performance at the edge portion can be improved.

  Each brush thread 32a of the loop brush 32 may be formed by twisting a plurality of threads. In this case, the strength of the loop portion can be improved and the durability thereof can be improved. Moreover, the number of edges in each brush thread 32a can be increased easily, and the scraping performance of the oil on the floor surface can be further improved. Further, if each brush thread 32a is formed by winding a plurality of ultrafine fiber threads, the effect can be further increased.

  In Patent Document 4, the brush thread is configured to have an irregular cross section, but the brush thread is not in a loop shape, and when the rotating brush rotates, the brush thread is on the floor surface along the rotating direction of the rotating brush. Simply stroke the oil or fat, or move it in a line. In other words, the above document does not have the idea of scraping oil and fat at the edge portion of the loop-like brush thread as in the present invention, and the present invention has such a technical idea. Is significantly different.

It is sectional drawing which shows the structure of the outline of the rotating brush accommodated in the suction inlet of the vacuum cleaner which concerns on one Embodiment of this invention. It is a perspective view which shows the external appearance of the said vacuum cleaner. It is sectional drawing which shows the structure of the outline of the said suction inlet. It is a perspective view which shows the external appearance of the loop brush which the brush part of the said rotating brush has. It is sectional drawing which shows the schematic structure of the braid | blade which is supported by the rotary body of the said rotating brush, and clamps the said loop brush. It is sectional drawing which shows the schematic structure of the said brush part which clamped the said loop brush with the said braid | blade. It is explanatory drawing which showed typically a mode that the fats and oils on a floor surface were scraped off with each brush thread of the said loop brush. It is explanatory drawing which shows the relationship between the contact amount to the front wall of each brush thread | yarn of the straight brush which the said brush part has, and the value of the static electricity which generate | occur | produces in a front wall at that time. It is a graph which shows the relationship between the said hit amount and the said static electricity. It is a graph which shows the relationship between the said hit amount and dust removal. It is sectional drawing which shows the schematic structure of the brush part of the rotating brush accommodated in the suction inlet of the vacuum cleaner which concerns on other embodiment of this invention. It is a perspective view which shows the state before affixing the loop brush of the said brush part on a braid | blade. It is explanatory drawing which shows the result of having conducted the experiment for trying the cleaning effect by changing the structure of the said rotating brush variously. It is sectional drawing which shows the other structural example of the said rotating brush. (A) And (b) is explanatory drawing which respectively shows the result about durability of a loop brush in case a cleaning object is a flooring and a carpet. It is sectional drawing which shows the structure of the outline of the brush part of the rotating brush accommodated in the suction inlet of the vacuum cleaner which concerns on further another embodiment of this invention. It is a perspective view which shows the external appearance of the said brush part. It is sectional drawing which shows the state of the said brush part which contacted the floor surface. It is sectional drawing which shows the other structural example of the said brush part. It is sectional drawing which shows the structure of the outline of the brush part of the rotating brush accommodated in the suction inlet of the vacuum cleaner which concerns on further another embodiment of this invention. It is sectional drawing which shows the structure of the outline of the suction inlet of the conventional vacuum cleaner. It is explanatory drawing which shows typically a mode that the fats and oils of a floor surface are stroked with the brush thread of the rotating brush accommodated in the said suction inlet. (A) is a perspective view showing the appearance of a brush thread having a triangular cross section, (b) is a perspective view showing the appearance of a brush thread having a square cross section, and (c) is a brush having an uneven cross section. It is a perspective view which shows the external appearance of a thread | yarn.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 3 Suction inlet 12 Brush part 21 1st brush part 31 2nd brush part 32 Loop brush 32a Brush thread 32b Base cloth 33 Blade (elastic body)
33a First support portion 33b Second support portion 41 Support portion 41b Support portion 51 Second brush portion 52 Blade (elastic body)
53 Tip portion 61 Second brush portion 71 Second brush portion

Claims (9)

A brush portion having a plurality of brush threads fixed to the base fabric;
A suction port body of a vacuum cleaner having a support section for supporting the brush section, and a rotating body for rotating the brush section;
The support portion is formed along a line connecting points on each circumference of both end faces sandwiching the circumferential surface of the rotating body on the circumferential surface,
The brush portion is formed in a loop shape by fixing both ends of the brush yarn to the base cloth so that a line connecting both ends of the brush yarn is along the forming direction of the support portion. Loop brush,
The loop brush scrapes off the oil on the floor surface at the loop portion of each brush thread by rotating with the surface of each brush thread forming the loop crossing the rotating direction of the rotating body. Vacuum cleaner inlet. The brush part is further supported by the support part, and further includes an elastic body that sandwiches the loop brush,
The loop brush is in a state in which the base fabric is bent along a line connecting both ends of the brush yarn so that the back surfaces of the base fabric opposite to the fixed surfaces of the brush yarns face each other. The suction port body of the vacuum cleaner according to claim 1, wherein the suction port body is sandwiched between the elastic bodies.   The brush portion is provided so as to protrude from the peripheral surface of the rotating body over the entire formation direction of the support portion, and further includes an elastic body that supports the loop brush,
  The back surface opposite to the fixed surface of each brush thread in the base fabric of the loop brush is a tip portion that is an upstream side and a downstream side in the rotational direction of the rotating body of the elastic body, which is a protrusion of the elastic body. The base fabric is affixed to the elastic body in a state where the base fabric is bent along a line connecting both ends of an arbitrary brush thread of the loop brush so as to cover the elastic band. The suction mouth of the vacuum cleaner.   The brush portion is provided so as to protrude from the peripheral surface of the rotating body over the entire formation direction of the support portion, and further includes an elastic body that supports the loop brush,
  The back surface opposite to the fixed surface of each brush thread in the base fabric of the loop brush is attached to the surface of the elastic body on the downstream side in the rotation direction of the rotating body. The suction mouth of the vacuum cleaner as described.   A brush portion having a plurality of brush threads fixed to the base fabric;
  A suction port body of a vacuum cleaner provided with a rotating body that rotates while supporting the brush part,
  The brush portion fixes the brush yarns in a loop shape by fixing both ends of the brush yarns to the base cloth so that a line connecting both ends of the brush yarns is along the rotation axis direction of the rotating body. Has a loop brush formed,
  The loop brush scrapes off the oil on the floor surface at the loop portion of each brush thread by rotating with the surface of each brush thread forming the loop crossing the rotating direction of the rotating body. Vacuum cleaner inlet.   Each suction thread of the said vacuum brush has the edge in the surrounding surface, The suction inlet of the vacuum cleaner in any one of Claim 1 to 5 characterized by the above-mentioned.   The suction mouth of the vacuum cleaner according to claim 6, wherein the loop brush is formed of a woven fabric.   The suction mouth of the vacuum cleaner according to claim 6, wherein the loop brush is formed of a knitted fabric.   A suction port body of a vacuum cleaner according to any one of claims 1 to 8,
  An electric vacuum cleaner comprising: an electric blower that sucks air containing dust from the suction port body.

Images