JP2021104145A - Blade and rotary blade - Google Patents

Abstract

To provide a blade which can easily be manufactured and reduce noise when used, and a rotary blade.SOLUTION: A blade 32 includes: a function part 40 which is fitted to a groove formed in a rotary body rotatably fitted to a head of a vacuum cleaner and is formed by weaving a belt in thread; and a fitting part 41 which is provided at one end part in a short hand direction X of the function part 40 so as to extend in a longitudinal direction Y and can be fitted to the groove. The fitting part 41 is provided with a cylinder part 42 formed by weaving a cylinder in thread and a core material 43 arranged in the cylinder part 42.SELECTED DRAWING: Figure 5

Description

The present invention relates to a blade provided on the head of a vacuum cleaner for scraping dust on a floor surface and a rotary blade provided with the blade.

Generally, a vacuum cleaner includes a main body and a suction tool connected to the main body via a hose. Then, the vacuum cleaner sucks air from the suction port provided on the bottom surface of the suction tool while moving the suction tool on the floor surface of a carpet, flooring, tatami mat, etc., so that dust is sucked into the main body. It is configured to be.

In recent years, in order to improve the dust collecting ability on a floor surface such as a carpet where it is difficult to suck dust etc. only by sucking air, a rotating blade for scraping dust etc. from the floor surface is provided in the suction tool. Has come to be seen in large numbers. Such a rotating blade has a configuration in which a blade is attached to a rotating body, and conventionally, as such a blade, for example, a cleaning member shown in Patent Document 1 is known.

Japanese Unexamined Patent Publication No. 2007-75166

By the way, since the cleaning member as described above is formed by extrusion molding a relatively soft material such as rubber, it cannot be easily manufactured and the noise generated by contact with the floor surface during use becomes large. There is a problem that it ends up.

The present invention has focused on such problems existing in the prior art. An object of the present invention is to provide blades and rotary blades that can be easily manufactured and reduce noise during use.

Hereinafter, means for solving the above problems and their actions and effects will be described.
The blade that solves the above-mentioned problems is a blade that is attached to a groove formed in a rotating body that is rotatably attached to the head of a vacuum cleaner, and has a functional portion formed by weaving a thread in a strip shape and the above-mentioned function. A mounting portion that is provided at one end in the lateral direction of the portion so as to extend in the longitudinal direction and can be attached to the groove is provided, and the mounting portion has a tubular portion formed by weaving a thread into a tubular shape. It is a gist that the core material arranged in the cylinder portion is provided.

According to this configuration, since the functional portion and the tubular portion are made of a woven fabric, the blade can be easily manufactured only by weaving the functional portion and the tubular portion so that the tubular portion wraps the core material. In addition, since the functional part is made of woven fabric, noise generated by contact with the floor surface during use can be reduced as compared with the case where the functional part is made of rubber or the like. Therefore, it can be easily manufactured and noise during use can be reduced.

In the blade, the functional portion is formed by double weaving a yarn containing a heat-melted yarn and a yarn not containing the heat-melted yarn, and one surface thereof is more than a yarn not containing the heat-melted yarn. It is preferable that the yarn containing the heat-melted yarn is more exposed, and the yarn not containing the heat-melted yarn is more exposed on the other surface than the yarn containing the heat-melted yarn.

According to this configuration, when the yarn containing the heat-melted yarn is melted and solidified, it becomes harder than the yarn not containing the heat-melted yarn, so that the hardness can be made different between both sides of the functional portion. That is, the functional portion can secure the shape retention by the surface on the yarn side containing the heat-melted yarn, and can secure the suppleness by the surface on the yarn side not containing the heat-melted yarn.

In the blade, it is preferable that the tubular portion is formed by weaving a yarn containing a heat-melted yarn into a tubular shape, and the core material is made of the same material as the material constituting the tubular portion.

According to this configuration, the tubular portion can be easily welded to the core material.
It is preferable that the blade is provided with the mounting portions at both ends of the functional portion in the lateral direction.

According to this configuration, one mounting portion can function as a part of the functional portion.
The rotating blade that solves the above problems includes a rotating body and a blade having the above configuration that is attached to the groove formed in the rotating body, and brings the blade into contact with the contact portion while rotating the rotating body. It is a rotating blade used, and the gist is that the groove extends so as to form a V shape.

According to this configuration, since the blade is attached to the rotating body so as to form a V shape, for example, even if the hair is wrapped around the rotating blade, the wrapped hair can be guided to the central portion of the rotating blade by the blade. ..

According to the present invention, it can be easily manufactured and noise during use can be reduced.

FIG. 6 is a schematic cross-sectional view showing a head of the vacuum cleaner of one embodiment. A schematic side sectional view showing the usage state of the head of the vacuum cleaner. Schematic perspective view showing a rotary blade of an electric vacuum cleaner. A side enlarged view of FIG. Schematic perspective view of the blade used for the rotating blade. A side enlarged schematic view showing a main part of a rotating blade of a modified example. A side enlarged schematic view showing a main part of a rotating blade of a modified example. Schematic perspective view of the blade of the modified example. FIG. 8 is an enlarged side view showing a main part of the rotating blade having the blade of FIG. The front schematic view of the blade of the modification example. The front schematic view of the blade of the modification example. The front schematic view of the blade of the modification example.

Hereinafter, an embodiment of the rotary blade will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the head 11 of the vacuum cleaner for sucking dust such as hair and dust on the floor surface F as an example of the contact portion includes a case 12 having a substantially T-shape in bottom view. ing. One end side of the connecting pipe 13 is rotatably connected to the rear end portion of the case 12, and the other end side of the connecting pipe 13 is connected to the main body portion (not shown) of the vacuum cleaner. A rectangular suction port 14 long in the left-right direction is formed at a position near the front end of the bottom wall of the case 12 so as to penetrate the bottom wall.

A rectangular frame-shaped partition plate 15 is erected on the inner bottom surface of the case 12 so as to surround the suction port 14, and air is pierced in the central portion of the rear wall constituting the partition plate 15 so as to penetrate the rear wall. A suction port 16 is formed. A motor bearing 17 is provided on the left inner side surface of the case 12, and the motor bearing 17 rotatably supports the tip of a motor shaft 19 extending from the motor 18 provided behind the partition plate 15 in the case 12.

Rotating supports 20 are provided on the left and right side walls of the partition plate 15, and the rotating supports 20 are rotatably supported by bearings 21 provided on the left and right inner side surfaces of the case 12. A rotating blade 22 whose rotation axis extends in the left-right direction is housed inside the partition plate 15, and both ends of the rotation blade 22 are supported by both rotation supports 20.

One endless belt 23 is wound around the rotary support 20 on the left side and the pulley 19a attached to the motor shaft 19. Therefore, when the motor 18 is driven, the rotational driving force is transmitted to the rotary blade 22 via the motor shaft 19, the pulley 19a, the belt 23, and the rotary support 20 on the left side, and the rotary blade 22 is viewed from the left side. It is rotationally driven in the counterclockwise direction (the direction indicated by the arrow in FIG. 2).

Next, the configuration of the rotary blade 22 will be described in detail.
As shown in FIGS. 3 and 4, the rotating blade 22 includes a round bar-shaped rotating body 31 and a plurality of (eight in this example) strip-shaped cleaning blades 32 attached to the rotating body 31. ing. A plurality of pairs of angular grooves 33 extending from both ends to the center are formed on the peripheral surface of the rotating body 31 so as to be evenly spaced in the circumferential direction (4 pairs in this example).

Each pair of grooves 33 extends so as to form a V shape, and the ends of the rotating body 31 on the central portion side are close to each other. Then, each blade 32 is attached to the rotating body 31 by sliding the blade 32 into each groove 33. In each groove 33, the size of the opening 34 on the outer side in the radial direction of the rotating body 31 is smaller than the size on the inside.

Next, the configuration of the blade 32 will be described in detail.
As shown in FIGS. 4 and 5, the blade 32 extends in the longitudinal direction Y of the functional portion 40 at one end of the functional portion 40 formed by weaving the yarn in a strip shape and the lateral direction X of the functional portion 40. It is provided with a mounting portion 41 which is provided as described above and can be mounted by slidingly inserting it into the groove 33 of the rotating body 31. The mounting portion 41 includes a tubular portion 42 formed by weaving threads into a tubular shape, and a core material 43 arranged in the tubular portion 42.

The functional portion 40 and the tubular portion 42 are made of a woven fabric woven integrally with a thread made of polyamide. The functional portion 40 and the tubular portion 42 are formed by performing only the work of weaving the yarn so that the core material 43 is arranged in the tubular portion 42. That is, the work of forming the shapes of the functional portion 40 and the tubular portion 42 does not include any cutting work.

The functional portion 40 is formed by double-weaving a yarn containing a heat-melted yarn and a yarn not containing the heat-melted yarn so as to form a band. As the heat-melted yarn, a yarn made of polyamide having a low melting point is used. For at least a part of the weft threads extending in the lateral direction X constituting the functional portion 40, a monofilament having a thickness (diameter) of 0.2 mm or more and 0.3 mm or less is used in order to prevent the functional portion 40 from sagging. Is preferable.

In the functional unit 40, more yarns containing the heat-melted yarn are exposed than the yarns not containing the heat-melted yarn on the first surface 44, which is one surface, and the second surface 45, which is the other surface, is thermally melted. The yarns that do not contain heat-melted yarns are more exposed than the yarns that contain yarns. The tubular portion 42 is formed by weaving a yarn containing a heat-melted yarn into a tubular shape. As the heat-melted yarn, a yarn made of polyamide having a low melting point is used.

The core material 43 has a rectangular rod shape, and is made of the same material as the thread material constituting the tubular portion 42. Polyamide is used as the material constituting the core material 43. Then, the heat-melted yarn in the blade 32 is in a state of being melted by heating and then solidified again by natural cooling.

Therefore, the blade 32 is in a state in which the tubular portion 42 and the core material 43 are firmly welded. When the heat-melted yarn is melted and solidified, it becomes hard. Therefore, in the functional portion 40 of the blade 32, the first surface 44 is harder than the second surface 45. That is, the functional unit 40 has both softness and hardness.

The size of the mounting portion 41 on the blade 32 is slightly smaller than the internal size of the groove 33 of the rotating body 31 and larger than the size of the opening 34 of the groove 33 of the rotating body 31. When the blade 32 is attached to the rotating body 31, the attachment portion 41 is formed inside each pair of grooves 33 from the end of the rotating body 31 so that the functional portion 40 projects outward from the opening 34 of the groove 33. Is inserted while sliding toward the central portion of the rotating body 31.

In this case, each blade 32 is attached to the groove 33 of the rotating body 31 so that the second surface 45 of the functional portion 40 is on the front side of the rotating body 31 in the rotation direction K. Further, in this case, the blades 32 are arranged so as to form a V shape in pairs, similarly to the grooves 33.

Next, the operation of the rotary blade 22 will be described.
By the way, when using the vacuum cleaner, first, as shown in FIG. 2, the head 11 is first placed on the floor surface F. As a result, the blade 32 is in contact with the floor surface F. When the vacuum cleaner is operated in this state, the motor 18 is driven, and the air inside the partition plate 15 passes through the air suction port 16 and the main body of the vacuum cleaner via the connection pipe 13 (not shown). It is sucked in.

At this time, while the rotating blade 22 is rotated in the counterclockwise direction (direction indicated by the arrow in FIG. 2; rotation direction K shown in FIG. 4) in conjunction with the drive of the motor 18, the blade 32 of the rotating blade 22 The functional unit 40 comes into contact with the floor surface F. Then, dust such as hair and dust on the floor surface F is scraped off by the functional portion 40 of the blade 32 and sucked into the main body portion (not shown) of the vacuum cleaner together with the air.

At this time, hair on the floor surface F (particularly hair (hair), pet hair, etc.) may be wrapped around the rotating blade 22. However, since each pair of blades 32 of the rotating blades 22 is arranged so as to form a V shape, hair or the like wrapped around the rotating blades 22 is guided to the central portion of the rotating blades 22 corresponding to the air suction port 16. It is quickly sucked into the air suction port 16.

In this case, since the rotary blade 22 is made of polyamide having excellent slidability, the hair or the like wrapped around the rotary blade 22 is smoothly moved toward the central portion of the rotary blade 22. Therefore, even if hair or the like is wrapped around the rotating blade 22 by using the rotating blade 22, the wrapped hair or the like is easily removed from the rotating blade 22.

Further, since the blade 32 of the rotating blade 22 is arranged so that the second surface 45, which is softer than the first surface 44 of the functional portion 40, is on the front side of the rotating body 31 in the rotation direction K, the rotating blade 22 rotates. Occasionally, the second surface 45 of the functional portion 40 of the blade 32 comes into contact with the floor surface F. Therefore, the noise generated when the blade 32 comes into contact with the floor surface F is reduced.

According to the embodiment described in detail above, the following effects are exhibited.
(1) The blade 32 is provided at one end of a functional portion 40 formed by weaving threads in a strip shape and one end of the functional portion 40 in the lateral direction X so as to extend in the longitudinal direction Y, and a groove 33 of the rotating body 31. It is provided with a mounting portion 41 that can be mounted on the. The mounting portion 41 includes a tubular portion 42 formed by weaving threads into a tubular shape, and a core material 43 arranged in the tubular portion 42.

According to this configuration, since the functional portion 40 and the tubular portion 42 are made of woven fabric, the blade 32 can be easily manufactured only by weaving the functional portion 40 and the tubular portion 42 so that the tubular portion 42 wraps the core material 43. can. In addition, since the functional unit 40 is made of woven fabric, noise (contact sound, sliding sound, etc.) generated by contact with the floor surface F during use can be reduced as compared with the case where the functional unit 40 is made of rubber or the like. Can be reduced. Therefore, it is possible to provide a blade 32 that can be easily manufactured and can reduce noise during use.

(2) In the blade 32, the functional portion 40 is formed by double weaving a yarn containing a heat-melted yarn and a yarn not containing the heat-melted yarn, and one surface of the blade 32 is a yarn containing no heat-melted yarn. The yarn containing the heat-melted yarn is more exposed, and the yarn containing the heat-melted yarn is more exposed on the other surface than the yarn containing the heat-melted yarn.

According to this configuration, when the yarn containing the heat-melted yarn is melted and solidified, it becomes harder than the yarn not containing the heat-melted yarn, so that it is hard between the first surface 44 and the second surface 45 in the functional portion 40. You can make a difference. That is, the functional portion 40 can secure the shape retention by the relatively hard first surface 44 which is the surface on the yarn side containing the heat-melted yarn, and by the second surface 45 which is the surface on the yarn side which does not contain the heat-melted yarn. You can ensure suppleness.

(3) In the blade 32, the tubular portion 42 is formed by weaving a yarn containing a heat-melted yarn into a tubular shape, and the core material 43 is made of the same material as the material constituting the tubular portion 42. According to this configuration, the tubular portion 42 can be easily welded to the core material 43.

(4) In the rotating blade 22, each pair of grooves 33 of the rotating body 31 extends so as to form a V shape. According to this configuration, each pair of blades 32 is attached to each pair of grooves 33 of the rotating body 31 so as to form a V shape, so that even if hair is wrapped around the rotating blade 22, for example, the wrapped hair can be wound. Each pair of blades 32 can lead to the central portion of the rotating blades 22. Therefore, the hair wrapped around the rotating blade 22 can be easily removed.

(Change example)
The above embodiment can be modified and implemented as follows. Further, the above-described embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

As shown in FIG. 6, in the rotary blade 22, the blade 32 may have mounting portions 41 provided at both ends of the functional portion 40 in the lateral direction X. In this way, of the two mounting portions 41, the mounting portion 41 located on the side opposite to the mounting portion 41 mounted in the groove 33 of the rotating body 31 can function as a part of the functional portion 40. In this case, the cross-sectional shape of the mounting portion 41 located on the side opposite to the mounting portion 41 mounted in the groove 33 of the rotating body 31 of the two mounting portions 41 may be circular as shown in FIG. , It may be an ellipse or a triangle other than a circle.

As shown in FIGS. 8 and 9, in the blade 32 of FIG. 7 described above, instead of the mounting portion 41 having the rectangular rod-shaped core material 43, the functional portion 40 extends in the longitudinal direction Y and the functional portion 40 A base material 51 having a pair of sandwiching portions 50 joined to the functional portion 40 while sandwiching an end portion on the side opposite to the mounting portion 41 side having a circular rod-shaped core material 43 in the lateral direction X is mounted. It may be used as a part. The base material 51 is made of synthetic resin, and has a rectangular plate-shaped locking portion 52 for inserting and locking into each groove 33 of the rotating body 31, and an L-shaped plate formed on the locking portion 52. It is provided with a pair of holding portions 50 in the shape of a shape. The pair of holding portions 50 are erected on the locking portion 52 so as to face each other in the width direction Z of the locking portion 52. The tip portions of the pair of sandwiching portions 50 extend perpendicular to the base end portions of the pair of sandwiching portions 50 so as to be separated from each other in the width direction Z of the locking portion 52. That is, the tip portions of the pair of sandwiching portions 50 are bent at right angles to the base end portions and extend in parallel with the locking portion 52. Then, one base end portion of the pair of sandwiching portions 50 is sandwiched between the end portions on the side opposite to the mounting portion 41 side having the circular rod-shaped core member 43 in the lateral direction X of the functional portion 40. Is sewn to the functional portion 40 by the sewing thread 53 of the above. The shape of the groove 33 of the rotating body 31 is changed according to the shape of the base material 51.

As shown in FIG. 10, the functional portion 40 of the blade 32 may be formed so that the height from the mounting portion 41 becomes lower toward the central portion in the longitudinal direction Y.
As shown in FIG. 11, the functional portion 40 of the blade 32 may be formed so that the height from the mounting portion 41 decreases from one end to the other end in the longitudinal direction Y.

As shown in FIG. 12, the functional portion 40 of the blade 32 may be formed so that the height from the mounting portion 41 increases toward the central portion in the longitudinal direction Y.
-The functional portion 40 and the tubular portion 42 may be formed in their shape by cutting. In this case, it is preferable that the functional portion 40 and the tubular portion 42 are cut by an ultrasonic cutter. When the functional portion 40 and the tubular portion 42 are cut with an ultrasonic cutter, the cut portions of the functional portion 40 and the tubular portion 42 are melted by the heat at the time of cutting and then solidified, so that the thread is difficult to be unwound from the cut portion.

-In the rotating blade 22, each pair of grooves 33 of the rotating body 31 does not necessarily have to extend so as to form a V shape.
-In the blade 32, the core material 43 does not necessarily have to be made of the same material as the material constituting the tubular portion 42.

-In the blade 32, the functional portion 40 does not necessarily have to be formed by double weaving a yarn containing a heat-melted yarn and a yarn not containing a heat-melted yarn.
-The yarn constituting the woven fabric constituting the blade 32 may be composed of a synthetic resin other than polyamide.

-The number of grooves 33 formed in the rotating body 31 may be changed as appropriate.
-A functional thread may be used for the woven fabric constituting the blade 32. In this way, various functions can be easily imparted to the blade 32. Examples of the functional thread include a thread having an antibacterial function, a thread having a deodorant function, a thread having a water absorption function, and nanofibers. Only one type of these functional threads may be used, or two or more types may be used in combination. In particular, since nanofibers have a high grip on the floor surface F, it is possible to improve the scraping property of hair and dust on the floor surface F by using nanofibers as a part of the woven fabric constituting the blade 32. can.

-The core material 43 may be made of a bundle of a plurality of threads, rubber, wood, non-woven fabric, metal, or the like.
-The cross-sectional shape of the core material 43 may be changed as appropriate.

11 ... Head 22 ... Rotating blade 31 ... Rotating body 32 ... Blade 33 ... Groove 40 ... Functional part 41 ... Mounting part 42 ... Cylinder part 43 ... Core material F ... Floor surface as an example of contact part X ... Short side of functional part Direction Y: Longitudinal direction of the functional part

Claims (5)

A blade that is attached to a groove formed in a rotating body that is rotatably attached to the head of a vacuum cleaner.
A functional part formed by weaving threads in a strip shape,
A mounting portion that is provided at one end in the lateral direction of the functional portion so as to extend in the longitudinal direction and can be mounted in the groove, and a mounting portion.
With
The mounting part is
A tubular part formed by weaving threads into a tubular shape,
The core material arranged in the cylinder and
A blade characterized by being equipped with. The functional portion is formed by double weaving a yarn containing a heat-melted yarn and a yarn not containing a heat-melted yarn.
The yarn containing the heat-melted yarn is more exposed on one surface than the yarn not containing the heat-melted yarn, and the other surface does not contain the heat-melted yarn than the yarn containing the heat-melted yarn. The blade according to claim 1, wherein more threads are exposed. The tubular portion is formed by weaving a yarn containing a heat-melted yarn into a tubular shape.
The blade according to claim 1 or 2, wherein the core material is made of a material of the same type as the material constituting the tubular portion. The blade according to any one of claims 1 to 3, wherein the mounting portions are provided at both ends of the functional portion in the lateral direction. A rotating body and a blade according to any one of claims 1 to 4 attached to a groove formed in the rotating body are provided, and the blade comes into contact with a contact portion while rotating the rotating body. It is a rotating blade that is used to make it
The rotary blade is characterized in that the groove extends so as to form a V shape.

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