JP2003052584A - Rotating brush for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating brush for a vacuum cleaner in which pile yarns improve the dust wiping capability and which can reduce damage to a floor due to contact with the pile yarns. SOLUTION: A rotating brush 21 attached to the inside of the head of a vacuum cleaner is comprised of a rotor 31 having a plurality of grooves 32 and strip-shaped velour materials 35 stored in the grooves 32. The velour material 35 is formed of a foundation cloth 33 and rows of piles 34 standing out on the foundation cloth 33. The rows of piles 34 are first rows of piles 37 formed of soft yarns and second rows of piles 38 extending parallelly beside the first piles 37 and formed of hard yarns.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner which is disposed in a head for sucking dust into a main body of an electric vacuum cleaner and is used for scraping dust from a floor surface of a carpet, tatami mat, flooring or the like. It is related to the rotating brush.

[0002]

2. Description of the Related Art Conventionally, electric vacuum cleaners have a main body and a head connected to the tip of the main body via a hose. Then, the head is moved on a floor surface of a carpet, a flooring, a tatami mat, or the like, and air is sucked from a suction port provided on the bottom surface thereof, so that dust is sucked into the main body. In recent years, in order to improve the dust collecting ability for a floor surface, such as a carpet, which is difficult to suck dust by only sucking air, a head provided with a rotating brush is provided.

The rotary brush is provided with a round rod-shaped rotary member housed rotatably in the head and a pile thread raised on the surface of the rotary member. The pile yarn constitutes a velor material by being woven by a pile weave into a strip-shaped base cloth made of a woven cloth. Further, the rotating body has a plurality of recessed lines extending in the rotation axis direction on the surface thereof,
A rotary brush is formed by accommodating and fixing the velor material in these concave lines. Then, the rotary brush is rotated in the head by suction of air into the main body or a driving device such as a motor, and the tip end of the pile yarn is slid on the floor surface, so that dust is scraped off from the floor surface. It is like this.

[0004]

However, according to the above conventional rotary brush, in order to enhance the dust collecting ability of the electric vacuum cleaner, the rigidity of the pile yarn is increased, that is, the pile yarn is hardened to scrape the dust. It is necessary to improve the taking ability. However, when a hard yarn is used as the pile yarn, there is a problem that the floor face is damaged when the pile yarn comes into sliding contact with a smooth floor such as a flooring.

The present invention has been made by paying attention to the problems existing in such a conventional technique. An object of the invention is to provide a rotary brush for an electric vacuum cleaner, which can improve dust scraping ability by pile yarns and can suppress scratches on a floor surface due to contact of pile yarns. It is in.

[0006]

In order to achieve the above object, the invention of a rotary brush for an electric vacuum cleaner according to claim 1 is for sucking dust on the floor surface into the main body of the electric vacuum cleaner. A rotary body rotatably housed in the head, and a plurality of pile rows raised from the peripheral surface of the rotary body so as to extend in the rotation axis direction of the rotary body. The pile rows are configured to come into contact with the floor surface while rotating the rotating body when moving the piles, and each pile row includes a first pile yarn made of a chemical fiber and the first pile yarn.
It is characterized by being formed in combination with a second pile yarn having a higher rigidity than the first pile yarn by using a chemical fiber having a larger thickness per single fiber than the chemical fiber forming the pile yarn. To do.

According to a second aspect of the present invention, there is provided the rotating brush for a vacuum cleaner according to the first aspect of the present invention.
By arranging the pile yarn on the front side in the rotation direction of the rotating body and the second pile yarn on the rear side, the first pile yarn comes into contact with the floor surface before the second pile yarn. It is characterized by.

According to a third aspect of the present invention, there is provided a rotary brush for a vacuum cleaner according to the first or second aspect of the invention, wherein the thickness of the synthetic fiber forming the first pile yarn per single fiber is small. Is 3 to 75 decitex, the thickness per single fiber of the synthetic fiber forming the second pile yarn is 17 to 500 decitex, and the thickness per single fiber of the synthetic fiber forming the second pile yarn is first. It is characterized in that it is more than twice as thick as the single fiber of the synthetic fiber forming the pile yarn.

According to a fourth aspect of the present invention, there is provided a rotating brush for an electric vacuum cleaner according to any one of the first to third aspects, wherein the first pile yarn is higher than a surface of the rotating body. Is formed so as to be higher than the height of the second pile yarn from the surface of the rotating body.

According to a fifth aspect of the present invention, there is provided a rotating brush for an electric vacuum cleaner according to any one of the first to fourth aspects, wherein the second pile yarn is higher in heat than the first pile yarn. It is characterized by being formed of a high shrinkage yarn having a high shrinkage ratio.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment of the present invention will be described below in detail with reference to the drawings.

First, the structure of the head of the electric vacuum cleaner in which the rotating brush is arranged will be described. As shown in FIG.
The case 11 constituting the head is formed in a substantially T-shape in a plan view, and a connection pipe 12 for connecting the head to a main body of an electric vacuum cleaner (not shown) is formed at the rear end portion on the lower side in the figure. Is rotatably attached to. On the front wall of the bottom wall of the case 11, a long-hole-shaped suction port 13 is provided so as to extend in the lateral direction. At the periphery of the suction port 13, a partition wall 1 having a rectangular frame shape is formed on the bottom wall of the case 11 so as to surround the suction port 13 inside.
4 is projected. An air suction port 15 is provided at the center of the rear end portion of the partition wall 14.

A turbine bearing 18 is provided on the inner surface of one side wall of the case 11, and one end of a turbine shaft 17 is rotatably supported by the turbine bearing 18. An air turbine 16 having a large number of fins 16 a is fixed to the other end of the turbine shaft 17 so as to be located in the immediate vicinity of the air suction port 15. The air turbine 16 is configured so as to be able to rotate within the case 11 about the turbine shaft 17.

A rotating brush 21 is provided inside the partition wall 14.
Is rotatably supported by a pair of brush bearings 20 respectively provided on the inner surfaces of both side walls of the case 11 via rotation supporting members 19 attached to both ends thereof. Further, a belt 22 is hung between the rotary support 19 on one end side and the roller 17a attached to one end of the turbine shaft 17, and the rotation of the air turbine 16 is rotated by the belt 22. 21 is transmitted.

The case 11, the connecting pipe 12, the suction port 13, the partition wall 14, the air suction port 15, the air turbine 1 described above.
6, turbine shaft 17, rotary support 19, rotary brush 2
The head of the electric vacuum cleaner is composed of the belt 1, the belt 22 and the like. When the electric vacuum cleaner is used, the air inside the partition wall 14 passes through the air suction port 15 and is sucked into the main body through the connection pipe 12, so that, for example, dust, dust, Suction port 13 for dust such as hair
It is supposed to be sucked in from.

As shown in FIG. 4, the head is a floor surface 1 of a carpet, tatami mat, flooring, tile, etc. when the vacuum cleaner is used.
It is designed to be placed on top of 0. In this state, the air flowing through the air suction port 15 to the connection pipe 12 hits the fins 16a to rotate the air turbine 16 in the clockwise direction. The rotating brush 21 is configured to rotate clockwise in conjunction with the rotation of the air turbine 16.

Next, the structure of the rotary brush 21 will be described. As shown in FIG. 1, the rotating body 31 that constitutes the rotating brush 21 includes a metal rod having a substantially X-shaped cross section formed by a combination of four protrusions having a T-shaped cross section. It is formed by being twisted by about 90 °, and has four spiral recesses 32 on its peripheral surface.
The openings of these recesses 32 are narrowed by the protrusions of the protrusions. Each recess 32 accommodates a velor material 35 composed of a synthetic resin band-shaped base cloth 33 and a pile row 34 standing on the base cloth 33 so as to extend in the longitudinal direction of the base cloth 33. There is. And
The pile rows 34 of each velor member 35 project outward from the openings of the recesses 32, so that a total of four pile rows 34 are raised on the peripheral surface of the rotating body 31.

The rotating brush 21 is composed of the rotating body 31, the four pile rows 34 and the like. Further, each pile row 34 is arranged so as to extend along the opening of the recess 32 to form a spiral shape extending in the rotation axis direction of the rotating body 31. As shown in FIG. 4, when the head is placed on the floor surface 10, the rotary brush 2
1, the tip of the pile row 34 is projected outward from the suction port 13 and brought into contact with the floor surface 10. Then, the rotary brush 21 is rotated with the tip of the pile row 34 in contact with the floor surface 10, whereby the pile row 3 is rotated.
4 is configured to scrape dust on the floor surface 10.

As shown in FIG. 2, the base cloth 33 constituting the velor material 35 is formed of a material such as a woven cloth or a film made of a material having high durability and flexibility. Examples of such a material include nylon, polypropylene, polyester, acrylic resin and urethane resin. The base fabric 33 of this embodiment is formed by using a woven fabric formed by weaving a warp yarn 33a and a weft yarn 33b made of synthetic fibers. The pile row 34
The first pile row 37 and the second pile row 38 are formed one by one, and two rows in total are provided adjacent to each other in the width direction of the base fabric 33. It should be noted that in FIG. 2, the first pile row 37 is darkly drawn in order to clearly show the arrangement of the first pile row 37 and the second pile row 38.

The velor material 35 forming the pile row 34
Can be obtained by pile weaving, warp knitting, electrostatic flocking and the like. In the pile row 34 of this embodiment, a plurality of first pile threads 37a are pile-woven on the base cloth 33 to form the first pile rows 37, and the plurality of second pile threads 38a are formed.
Are pile-woven to form a second pile row 38. Further, a coating layer 39 made of a synthetic resin coating agent is provided on the back surface of the base cloth 33, and the base cloth 33 is joined to the roots of the first pile yarn 37a and the second pile yarn 38a. In this pile weave, the first pile yarn 37a and the second pile yarn 38a forming the first pile row 37 and the second pile row 38 are respectively formed into the base fabric 3
It is a method of weaving it so that it is entwined with the 3 weft thread.

The first pile yarn 37a and the second pile yarn 38a are formed by twisting chemical fibers having high durability and abrasion resistance. Examples of such chemical fibers include nylon fibers, polyester fibers, polypropylene fibers, modacrylic fibers made of a copolymer of acrylic monomers and vinyl chloride, synthetic fibers such as acrylic fibers and fluorine fibers, rayon fibers, and reclaimed cupra fibers. Fiber etc. are mentioned. Among these, nylon fibers, polyester fibers, acrylic fibers and modacrylic fibers are more preferable because they are easily available and have high durability.

The second pile yarn 38a is formed such that the chemical fibers forming the second pile yarn 38a have a larger thickness per single fiber than the chemical fibers forming the first pile yarn 37a. Therefore, the first pile yarn 37a is a soft yarn, and the second pile yarn 38a is a harder yarn than the first pile yarn 37a. As shown in FIG. 4, in the velor material 35, the first pile row 37 made of the soft first pile thread 37a is the front side in the rotation direction of the rotary brush 21, and the second pile row 38 made of the hard second pile thread 38a.
Is attached to the rotating body 31 so that the rear side is on the rear side. Then, the rotary brush 21 is arranged such that the first pile row 37, which is soft, covers the second pile row 38, and the floor surface 1
Suppresses scratches on the floor surface 10 by touching 0,
The second pile row 38 is configured to satisfactorily scrape dust.

The first pile yarn 37a and the second pile yarn 38
In a, for example, in order to prevent yarns, hairs and the like from being entangled in the pile row 34, it is preferable that the thickness of each single fiber be in the following range. That is, the thickness per single fiber of the chemical fiber forming the first pile yarn 37a is preferably 3 to 75 decitex, and the thickness per single fiber of the chemical fiber forming the second pile yarn 38a is preferably Is 17 to 500 decitex. Further, the first pile yarn 37a and the second pile yarn 3
8a satisfies the respective thickness ranges, and the thickness per single fiber of the second pile yarn 38a is the first pile yarn 37.
It is preferably at least twice as large as that of a.
It is more preferably ˜167 times.

In the first pile yarn 37a, if the thickness per single fiber is less than 3 decitex, it is difficult to impart sufficient durability and abrasion resistance to the yarn, and there is a possibility that problems such as yarn breakage may occur. is there. Thickness per single fiber is 7
If thicker than 5 decitex, the first pile thread 37a
May damage the floor surface 10. Second pile yarn 38
In a, if the thickness per single fiber is less than 17 decitex, the dust on the floor surface 10 may not be able to be sufficiently scraped off. Thickness per single fiber is 5
If the thickness is larger than 00 decitex, the resistance against the floor surface 10 increases, and the rotating brush 21 may not be able to rotate. And the second pile yarn 38
When the thickness per filament of a is less than twice that of the first pile yarn 37a, there is a possibility that almost no difference will be seen in the hardness of the yarn.

In addition, when the thickness per single fiber of the first pile yarn 37a and the second pile yarn 38a is larger than 75 decitex and 500 decitex, respectively, it is pile-woven within a predetermined area on the base fabric 33. The number of each will decrease. Then, the first pile yarns 37a,
A gap is easily formed between the second pile yarns 38a,
It is not preferable to make the thickness per single fiber excessively thick, because threads, hairs, etc. may enter the gaps and become entangled easily. In particular, when the first pile yarn 37a is thickened, its rigidity is increased, and the first pile yarn 37a is repeatedly bent and stretched every time it comes into contact with the floor surface 10. As a result, the yarn, hair, etc. entangled at the tip of the first pile yarn 37a It is not preferable because it may move to the base end and become difficult to remove.

Further, the first pile yarn 37a is supported by the second pile yarn 38a from the rear side in the rotating direction of the rotating body 31,
In order to suppress hair fall of the pile row 37 and improve the dust scraping ability, it is more preferable to set the thickness per single fiber in the following range. That is, the first pile yarn 3
The thickness per single fiber of the chemical fiber forming 7a is more preferably 3 to 30 decitex, and the thickness per single fiber of the chemical fiber forming the second pile yarn 38a is more preferably 20 to 75. It is a decitex. further,
The first pile yarn 37a and the second pile yarn 38a satisfy the respective thickness ranges, and the thickness per single fiber of the second pile yarn 38a is at least twice as large as that of the first pile yarn 37a. It is preferable.

When the thickness per single fiber of the second pile yarn 38a is less than 20 decitex, the second pile yarn 38
There is a possibility that the first pile yarn 37a cannot be sufficiently supported by a. When the thickness per single fiber of the first pile yarn 37a is larger than 30 decitex, the first pile yarn 37a may be harder than the second pile yarn 38a after the twisting process. In addition, when the thickness per single fiber of the second pile yarn 38a is thicker than 75 decitex, when the pile row 34 slides on the floor surface 10, the second pile yarn 37a is curved from between the curved first pile yarns 37a. 38a may project and damage the floor surface 10.

Next, the operation of the rotary brush 21 will be described. Now, when using an electric vacuum cleaner, as shown in FIG. 4, the head is first placed on the floor surface 10. When the electric vacuum cleaner is operated in this state, the air inside the partition wall 14 passes through the air suction port 15 as shown by the arrow in the figure,
It is sucked into the main body (not shown) through the connection pipe 12. At this time, the connection pipe 12 passes through the air suction port 15.
The air flowing to hits the fins 16a and rotates the air turbine 16 in the clockwise direction. Then, the rotating brush 21 is rotated clockwise around the rotating body 31 in association with the rotation of the air turbine 16 to bring the pile rows 34 into sliding contact with the floor surface 10.

When the pile row 34 is brought into sliding contact with the floor surface 10, first, the first pile row 37 formed of the first pile thread 37a which is a soft thread is brought into contact with the floor surface 10. At this time, the first pile row 37 is formed of the second pile yarn 38a which is a hard yarn from the rear side in the rotation direction of the rotating body 31 and is formed by the second pile yarn 38a.
By being supported by the pile row 38, large bending due to sliding contact with the floor surface 10 is suppressed, and the napped state is maintained. Therefore, the first pile row 37 polishes the floor surface 10 at its ends to scrape off dust to some extent, and
It functions as a cushioning material (cushion) for softening the contact force of the second pile row 38 with respect to the floor surface 10. Also,
The dust that could not be scraped off by the first pile row 37 is scraped off at the end of the second pile row 38 thereafter.
Then, the soft first pile row 37 is replaced by the second pile row 38.
To soften the contact force to the floor surface 10,
The scratches on the floor surface 10 due to the contact of the pile rows 34 are suppressed, and the hard second pile rows 38 improve the dust scraping ability of the pile rows 34.

The effects exhibited by the first embodiment will be described below. The four pile rows 34 of the rotary brush 21 are each formed of a first pile row 37 and a second pile row 38, that is, two rows in total. The first pile row 37 is formed of the first pile yarn 37a that is softened by reducing the thickness per single fiber. On the other hand, in the second pile row 38, the thickness per single fiber is set to the first pile yarn 37a.
The second pile yarn 38a is made thicker by making it thicker than the second pile yarn 38a. Therefore, while the hard second pile row 38 improves the dust scraping ability of the pile row 34, the soft first pile row 37 disposed adjacent to the second pile row 38 causes the pile row 34 It is possible to prevent the floor surface 10 from being damaged due to contact.

In addition to this, the first pile row 37 is arranged on the front side in the rotation direction of the rotating brush 21, that is, on the side that comes into contact with the floor surface 10 first, and the second pile row 38 is arranged on the rotating brush 21 side. Is disposed on the rear side in the rotation direction of, that is, on the side that comes into contact with the floor surface 10 later. Therefore, when the pile row 34 slides on the floor surface 10, the first pile row 37
Thus, the second pile row 38 can be covered, and the scratches on the floor surface 10 can be effectively suppressed.

The thickness per chemical fiber forming the first pile yarn 37a is 3 to 75 decitex, and the thickness per chemical fiber forming the second pile yarn 38a is 17 to 500. It is said to be a decitex.
In addition to this, the thickness per single fiber of the chemical fiber forming the second pile yarn 38a is twice or more as compared with the thickness per single fiber of the chemical fiber forming the first pile yarn 37a, For example, it is possible to prevent the yarn, the hair, and the like from being entangled with the pile row 34.

Further, the thickness per single fiber of the first pile yarn 37a is 3 to 30 decitex, and the second pile yarn 3 is
By setting the thickness per single fiber of 8a to 20 to 75 decitex, while suppressing the entanglement of the yarns, hair, etc., in the pile row 34, the hard first pile yarn 38a is used to move the soft first pile yarn 37a from the rear side. Can support,
Hair fall of the first pile yarn 37a can be prevented.

Furthermore, the soft first pile yarn 3
When the sliding contact with the floor surface 10 is made, 7a can wipe and polish the floor surface 10 dryly, and the cleaning effect on the floor surface 10 of the pile row 34 can be improved. In addition, yarn, hair, etc. entangled at the tip by contacting the floor surface 10 first,
Since the first pile yarn 37a is sufficiently soft, even if the first pile yarn 37a is bent and stretched every time it comes into sliding contact with the floor surface 10, it does not move to its base end and can be easily removed. (Second Embodiment) Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings. In each of the subsequent embodiments, points different from the first embodiment will be mainly described.

As shown in FIG. 5, in the velor material 35 of the second embodiment, the height of the first pile row 37 from the surface of the base cloth 33 is higher than the height of the second pile row 38 from the surface of the base cloth 33. It is formed to be higher than the height. as a result,
When the velor material 35 is housed in the groove 32 of the rotating body 31, the first pile row 3 exposed outward from the opening of the groove 32.
The height from the surface of the rotating body 31 of 7 is the second pile row 38.
It will be higher than that of. Then, when the pile row 34 slides on the floor surface 10, the first pile row 37 contacts the floor surface 10 while covering the entire second pile row 38, and the second pile row 38 directly contacts the floor surface 10. It is configured to suppress physical contact.

The height of the first pile row 37 is set to the second pile row 3
When the height is higher than the height of 8, the height of the second pile row 38 is preferably 85 to 90% of the height of the first pile row 37. The height of the second pile row 38 is set to the first pile row 3
If less than 85% of the height of 7, the second pile row 38 may not be able to sufficiently support the first pile row 37. If it is higher than 90%, the second pile row 38 may directly contact the floor surface 10 without the first pile row 37.

When the first pile row 37 and the second pile row 38 have different heights as described above, the second pile yarn 38a forming the second pile row 38 is the first pile row 37 forming the first pile row 37. It is preferable to use a high shrinkage yarn having a heat shrinkage rate higher than that of the 1-pile yarn 37a. Then, after the velor material 35 is formed, the entire velor material 35 is subjected to heat treatment, so that the second pile yarn 38a becomes the first pile yarn 3
The heat of the second pile row 38 is greatly reduced as compared with that of the first pile row 37, and the height of the second pile row 38 can be easily reduced as compared with the height of the first pile row 37.

In addition, when a high shrinkage yarn is used as the second pile yarn 38a, the shrinkage ratio of the high shrinkage yarn is preferably 3 to 3.
It is 0%, more preferably 5 to 15%. If the shrinkage ratio is less than 3%, there is a possibility that the difference in height between the second pile yarn 38a and the first pile yarn 37a will hardly appear even if heat shrinks. When it is larger than 30%, the second pile yarn 38a becomes too low as compared with the first pile yarn 37a,
There is a possibility that the first pile yarn 37a cannot be supported by the second pile yarn 38a from behind.

Now, the rotating brush 21 of the second embodiment.
According to the above, the first pile row 37 that is soft and has a high height is arranged on the side that comes into contact with the floor surface 10 first. Further, a second pile row 38 that is hard and low in height is arranged on the side that comes into contact with the floor surface 10 later. Therefore, when the pile row 34 comes into contact with the floor surface 10,
Since the pile row 38 is almost entirely covered by the first pile row 37, most of the pile row 38 comes into contact with the floor surface 10 via the first pile row 37, and the amount of contact with the floor surface 10 is reduced.

Therefore, according to the rotary brush 21 of the second embodiment, the height of the first pile row 37 is made higher than that of the second pile row 38, so that the second pile thread 38a, which is a hard thread, is The amount of contact with the floor surface 10 is reduced, and the floor surface 10
Can be more effectively suppressed. (Third Embodiment) As shown in FIG. 6, in the velours material 35 of the third embodiment, the pile rows 34 raised on the base cloth 33 are one first pile row 37 and two second pile rows. It is formed by a total of three rows including two pile rows 38. Then, when the pile row 34 is brought into sliding contact with the floor surface 10, the first pile row 37
The hair is prevented from falling down by being supported from the rear by the two second pile rows 38. In addition, by providing the two second pile rows 38, the first pile row 37
The force for supporting the piles is increased, the hardness of the entire pile row 34 is increased, and the ability to scrape dust is improved.

Therefore, according to the rotary brush 21 of the third embodiment, by providing a plurality of second pile rows 38 made of the hard second pile yarn 38a, the first pile row 37 is surely prevented from collapsing. In addition, the ability to scrape dust of the entire pile row 34 can be effectively improved.

The embodiment can be modified and embodied as follows. In each of the embodiments, the rotary brush 21 is configured to be rotated by the suction force of air. However, not limited to this, a drive device such as a motor is provided in the head, and the rotary brush 21 is rotated by this drive device. Or pile row 34
The rotating brush 21 may be rotated by the frictional force generated when the floor brush 10 contacts the floor surface 10.

The velor material 35 of the second embodiment may be configured by providing a plurality of second pile rows 38 as in the third embodiment. -In each embodiment, the first pile yarn 37a and the second pile yarn 37a
A conductive fiber having conductivity may be used for at least one of the pile yarns 38a. As a method for imparting conductivity to the above-mentioned chemical fibers, a conductive substance is kneaded in the raw yarn stage, or a conductive substance is kneaded into one fiber by a melt spinning method or the like. There are a method of forming a multi-layer structure having a part and a non-conductive part in which a conductive substance is not kneaded, and a method of coating the fiber surface with a working liquid containing a conductive substance after spinning. Examples of such conductive substances include metals such as silver, copper and nickel, metal compounds such as zinc oxide and tin oxide, and fine particles such as carbon. When configured in this manner, for example, a floor surface 10 such as a carpet that easily generates static electricity and is easily attracted with dust,
The static electricity can be removed to make it easier to scrape dust.

In each of the embodiments, it is not necessary to house the velor material 35 in all of the recesses 32 of the rotating body 31,
A cleaning blade formed in a long plate shape using synthetic rubber or the like may be attached to at least one of the concave lines 32. Then, dust may be blown up from the floor surface 10 by hitting the floor surface 10 with the cleaning blade.

In each embodiment, for example, the base cloth 33
In the above, the number of second pile yarns 38a to be pile-woven may be larger than the number of first pile yarns 37a to be pile-woven within a predetermined area. Then, by making the density of the second pile yarn 38a higher than that of the first pile yarn 37a, the second pile row 38 becomes the first pile row 3a.
It may be configured to be harder than 7.

In each embodiment, for example, a hard second
The first pile yarn 37a is arranged around the pile yarn 38a so as to surround the pile yarn 38a inwardly.
7a and the second pile yarn 38a may be twisted together to form one pile yarn. Then, the pile yarn may be pile-woven on the base cloth 33 to form a velor material. With such a configuration, it is possible to improve the scraping ability while suppressing damage to the floor surface by each pile yarn.

For example, the base cloth 33 is omitted, and the first pile yarn 37a and the second pile yarn 38a are electrostatically flocked, hammered, etc. on the circumferential surface of a round bar made of synthetic resin, synthetic rubber, or the like. The hair may be directly transplanted by the method of.

Further, the technical idea which can be understood from the above embodiment will be described below. A velor material including a base cloth and a pile row raised on the base cloth is formed by weaving the first pile thread and the second pile thread into a base cloth made of a woven cloth by pile weaving. At the same time, a plurality of recesses for accommodating the velor material are provided on the peripheral surface of the rotating body so as to extend in the direction of the rotation axis of the rotating body. A rotating brush for an electric vacuum cleaner according to. When configured in this way, first
Entangling the roots of the pile yarn and the second pile yarn can prevent the first pile yarn and the second pile yarn from falling off.

The thickness of the chemical fibers forming the first pile yarn per single fiber is 3 to 30 decitex, and the thickness of the chemical fibers forming the second pile yarn per single fiber is 20.
The thickness per chemical fiber forming the second pile yarn is at least twice as large as the thickness per chemical fiber forming the first pile yarn. A rotary brush for an electric vacuum cleaner according to any one of claims 1 to 5, which is characterized. With this configuration, the first pile yarn is supported by the second pile yarn, and the first pile yarn is
It is possible to suppress hair fall of the pile yarn and improve scraping ability.

Each of the plurality of pile rows is formed of a first pile row formed of a plurality of first pile threads and a plurality of second pile threads, and extends adjacent to the first pile row. A rotary brush for an electric vacuum cleaner according to any one of claims 1 to 5, wherein the rotary brush comprises a second pile row, and each pile row has at least two second pile rows. . With this configuration, the scraping ability can be further improved.

A rotary brush for a vacuum cleaner according to any one of claims 1 to 5, characterized in that at least one of the first pile yarn and the second pile yarn is formed of a conductive fiber. . With this configuration, static electricity can be removed, and the ability to scrape dust from the floor can be improved.

[0052]

As described in detail above, the present invention has the following effects. According to the invention described in claim 1, it is possible to improve the ability of the pile yarn to scrape off dust, and to suppress the damage to the floor surface due to the contact of the pile yarn.

According to the invention of claim 2, claim 1
In addition to the effect of the invention described in (3), when the pile row is in sliding contact with the floor surface, the first pile row can cover the second pile row, and the scratches on the floor surface can be effectively suppressed.

According to the invention of claim 3, claim 1
Or in addition to the effect of the invention described in claim 2, for example, a thread,
It is possible to prevent hair or the like from being entangled in the pile row. According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, the second pile yarn, which is a hard yarn, is prevented from contacting the floor surface, It is possible to effectively prevent scratches on the surface.

According to the invention of claim 5, claim 1
From the effect of the invention according to claim 4,
It is possible to reliably prevent the first pile yarns from falling over, and it is possible to effectively improve the ability of the entire pile row to scrape dust.

[Brief description of drawings]

FIG. 1 is a perspective view showing a rotating brush of an electric vacuum cleaner according to a first embodiment.

FIG. 2 is a cross-sectional view showing a state in which the velor material of the first embodiment is viewed from the side.

FIG. 3 is a plan sectional view showing a head of an electric vacuum cleaner.

FIG. 4 is a side sectional view showing a state in which the head of the electric vacuum cleaner is used.

FIG. 5 is a cross-sectional view showing a state in which the velor material of the second embodiment is viewed from the side.

FIG. 6 is a cross-sectional view showing a state in which the velor material of the third embodiment is viewed from the side.

[Explanation of symbols]

10 ... Floor surface, 31 ... Rotating body, 34 ... Pile row, 37a ...
First pile yarn, 38a ... Second pile yarn.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shogo Ando             43 Uchidacho Uchidacho, Aichi Prefecture             Thisco Ltd. F-term (reference) 3B061 AA06 AD05 AD13

Claims (5)

[Claims] 1. A rotary body rotatably housed in a head for sucking dust on a floor in a main body of an electric vacuum cleaner, and a circumference of the rotary body so as to extend in a rotation axis direction of the rotary body. A pile row that is raised from the surface, and when the head moves on the floor surface, the pile row is made to contact the floor surface while rotating the rotating body, and the pile row is made of a chemical fiber. The second pile yarn formed by using the first pile yarn and the chemical fiber forming the first pile yarn, the chemical fiber having a larger thickness per filament than the first pile yarn. A rotating brush for an electric vacuum cleaner, which is formed by combining and. 2. The first pile yarn is arranged on the front side in the rotation direction of the rotating body, and the second pile yarn is arranged on the rear side, whereby the first pile yarn is arranged on the floor surface before the second pile yarn. The rotating brush for an electric vacuum cleaner according to claim 1, wherein the rotating brush is configured to come into contact with the rotary brush. 3. The thickness per chemical fiber of the chemical fiber forming the first pile yarn is 3 to 75 decitex, and the thickness per chemical fiber of the chemical fiber forming the second pile yarn is 17 to 75 decitex.
It is 500 decitex, and the thickness per single fiber of the chemical fiber forming the second pile yarn is at least twice as large as the thickness per single fiber of the chemical fiber forming the first pile yarn. The rotating brush for the electric vacuum cleaner according to claim 1 or 2. 4. The first pile yarn is formed so that the height of the first pile yarn from the surface of the rotating body is higher than the height of the second pile yarn from the surface of the rotating body. A rotating brush for an electric vacuum cleaner according to any one of claims 1 to 3. 5. The electricity according to claim 1, wherein the second pile yarn is formed of a high shrinkage yarn having a heat shrinkage rate higher than that of the first pile yarn. Rotating brush for vacuum cleaner.