Cleaning body and rotating cleaning body

Abstract

To provide a cleaning body and a rotation cleaning body capable of suppressing noise when coming into contact with a body to be cleaned, and suppressing winding of a fibrous object to be cleaned.SOLUTION: A cleaning body comprises: a base 110; and a brush 120 where threads are continuous in an arch state in a longitudinal direction of the base 110 and are coupled and extend, and where nap is raised so that the threads cross and overlap in a state in which the threads are obliquely inclined in different directions on front and rear surfaces of the arch. The brush 120 is double-folded along a center in a short direction in a state of being woven in a zigzag state so as to fold the threads, and folded both ends are joined in a deviated state in a longitudinal direction for forming the arch, and the threads overlap without a gap.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a cleaning element and a rotary cleaning element. [Background technology]

[0002] A brush is known that includes a strip-shaped fluff body in which multiple brush threads are held in parallel by a holding thread, a strip-shaped body that extends in the longitudinal direction of the fluff body and is overlapped with the fluff body, and a substrate that extends in the longitudinal direction of the fluff body and has a pair of clamping portions that are joined together and clamp one end of the fluff body in a width direction perpendicular to the longitudinal direction and one end of the strip-shaped body in a width direction (Patent Document 1).

[0003] In an electric vacuum cleaner comprising a vacuum cleaner body, a hose with a grip portion at the handle that is connected to the vacuum cleaner body, an extension pipe that has one end detachably connected to the hose, and a floor suction tool that is detachably connected to the floor connector at the tip of the extension pipe, there is also known a floor suction tool for an electric vacuum cleaner in which a portion of the nap from the base to the tip is welded to the rotating brush of the floor suction tool that has a built-in brush and is rotated by a motor, giving the nap a horizontal connection (Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-13728 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-131305 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention provides a cleaning element and a rotary cleaning element that can suppress noise when they come into contact with an object to be cleaned and can also suppress entanglement of fibrous objects to be cleaned. [Means for solving the problem]

[0006] In order to solve the above problem, the cleaning element according to claim 1 is The base and The thread The fabric is folded in two along the center of the short side in a zigzag weave, and the folded ends are joined in a state of being shifted in the longitudinal direction, thereby forming a base in the longitudinal direction. It extends in an arch shape, and the front and back surfaces of the arch are inclined obliquely in different directions, crossing each other. No gaps With overlapping brushes and It is characterized by:

[0008] Claim 2 The invention described in claim 1 is a cleaning element according to claim 1, The angle at which the arch is inclined is in the range of 15 degrees to 75 degrees with respect to the longitudinal direction of the cleaning element. It is characterized by:

[0009] Claim 3 The invention described in claim 1 or 2 In the cleaning element described in The base end of the brush is clamped by the base in the longitudinal direction and fixed to the base by sewing. It is characterized by:

[0010] In order to solve the above problem, claims 4 The rotating cleaning body described is a rotor having a groove formed on its outer circumferential surface; The base is fitted into the groove and attached as claimed in any one of claims 1 to 5. 3 and a cleaning element according to any one of the preceding claims. It is characterized by: [Effects of the Invention]

[0011] According to the invention of claim 1, it is possible to suppress noise when contacting the object to be cleaned, and also to suppress entanglement of fibrous objects to be cleaned.

[0013] Claim 2 According to the invention described in the item (1), the scraped dust can be moved in the longitudinal direction of the cleaning element.

[0014] Claim 3 According to the invention described above, it is possible to prevent the thread from coming loose.

[0015] Claim 4 According to the invention described above, the function of the cleaning element can be exerted on the object to be cleaned. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic bottom view showing a cleaner head of an electric vacuum cleaner to which the rotary cleaning element according to the present embodiment is attached. FIG. [Figure 2] FIG. 2 is a schematic cross-sectional view showing the cleaner head of the electric vacuum cleaner in use. [Figure 3] FIG. [Figure 4] FIG. 2 is an enlarged schematic cross-sectional view of a rotary cleaning body. [Figure 5] 1(a) is a perspective view showing a partial cross section of the cleaning element, and FIG. 1(b) is a side view showing a partial side surface of the cleaning element. [Figure 6] 5A to 5C are schematic plan views showing a manufacturing process of the brush of the cleaning element. [Figure 7] 1A and 1B are diagrams showing the configurations of a cleaning element of an example and a cleaning element of a comparative example. [Figure 8] FIG. 1 shows the results of a hair tangling test. [Figure 9] FIG. 10 is a diagram showing the results of a pickup test. [Figure 10] FIG. 10 is a diagram showing the results of a noise test. DETAILED DESCRIPTION OF THE INVENTION

[0017] Next, the present invention will be described in more detail below with reference to the drawings, showing embodiments and specific examples, but the present invention is not limited to these embodiments and specific examples. Furthermore, in the following explanation using the drawings, it should be noted that the drawings are schematic and the ratios of the dimensions, etc. may differ from the actual ones, and in order to facilitate understanding, illustrations of components other than those necessary for the explanation have been omitted as appropriate.

[0018] (1) Vacuum cleaner suction head FIG. 1 is a schematic bottom view showing the cleaner head 10 of a vacuum cleaner to which the rotary cleaning body 20 of this embodiment is attached, FIG. 2 is a schematic cross-sectional view showing the cleaner head 10 of the vacuum cleaner in use, FIG. 3 is a perspective view showing the rotary cleaning body 20, and FIG. 4 is an enlarged schematic cross-sectional view of the rotary cleaning body 20. The cleaner head and the rotary cleaning element will now be described with reference to the drawings.

[0019] (1) Vacuum cleaner suction head FIG. 1 is a schematic bottom view showing the cleaner head 10 of a vacuum cleaner to which the rotary cleaning body 20 of this embodiment is attached, FIG. 2 is a schematic cross-sectional view showing the cleaner head 10 of the vacuum cleaner in use, FIG. 3 is a perspective view showing the rotary cleaning body 20, and FIG. 4 is an enlarged schematic cross-sectional view of the rotary cleaning body 20. The cleaner head and the rotary cleaning element will now be described with reference to the drawings.

[0020] (1.1) Overall structure of the suction head 1 and 2, a cleaner head 10 of a vacuum cleaner for sucking up debris such as hair and dust on a floor surface FL comprises a case 11 having a generally T-shaped overall shape and a connecting pipe 12 rotatably connected to the rear end of the case 11. A rectangular suction port 13 that is long in the left-right direction is formed in the bottom wall of the case 11 near the front end.

[0021] A rectangular frame-shaped partition plate 14 is erected on the inner bottom surface of case 11 so as to surround suction port 13, and an air suction port 15 is formed in the center of rear wall 14a constituting partition plate 14 so as to penetrate rear wall 14a. A motor bearing 16 is provided on the left inner surface of case 11, and motor bearing 16 rotatably supports the tip of motor shaft 17a extending from motor 17 provided behind partition plate 14 inside case 11.

[0022] Rotary supports 18 are provided on both left and right side walls 14b of partition plate 14, and the rotary supports 18 are rotatably supported by bearings 19 provided on both left and right inner surfaces of case 11. A rotary cleaning body 20 having a rotation axis c1 extending in the left-right direction is housed inside partition plate 14, and both ends of the rotary cleaning body 20 are supported by the rotary supports 18.

[0023] A timing belt TB is wound around the left-side rotating support 18 and the pulley 17b attached to the motor shaft 17a, and when the motor 17 is driven, its rotational driving force is transmitted to the rotating cleaning body 20 via the motor shaft 17a, pulley 17b, timing belt TB, and the left-side rotating support 18.

[0024] (1.2) Rotating Cleaning Body Configuration As shown in FIGS. 3 and 4, the rotary cleaning element 20 includes a rotor 21 and four cleaning elements 100 provided in the longitudinal direction (axial direction) of the rotor 21. The rotor 21 is a generally round rod-shaped shaft with equally spaced grooves 22 formed around its periphery, and each groove 22 is twisted circumferentially by approximately 180 degrees and extends longitudinally from one end face of the rotor 21 to the other end face.

[0025] The cleaning element 100 is attached by fitting its base 110 into the recessed groove 22 from one end face side of the rotating element 21. In the rotating cleaning element 20, the brush 120 comes into contact with the floor surface FL, which is the object to be cleaned, as the rotating element 21 rotates (indicated by the arrow R in the figure), allowing the brush 120 to scrape off fibrous debris and dust, while also suppressing an increase in noise when it comes into contact with the floor surface FL.

[0026] (2) Cleaning body 5(a) is a perspective view showing a partial cross section of the cleaning element 100, (b) is a side view showing a partial side surface of the cleaning element 100, and Fig. 6 is a schematic plan view showing the manufacturing process of the brush 120 of the cleaning element 100. The configuration and manufacturing method of the cleaning element 100 will be described below with reference to the drawings.

[0027] 5, the cleaning element 100 includes a base 110 and a brush 120 in which threads 121 extend continuously in an arch shape in the longitudinal direction (X direction) of the base 110, with the threads raised so that they intersect and overlap while being inclined obliquely in different directions on the front and back surfaces of the arch. The base end of the brush 120 is clamped by the base 110 in the longitudinal direction and fixed to the base 110 by sewing.

[0028] (2.1) Foundation The base 110 is made of synthetic resin and includes a locking portion 111 having a rectangular cross section for fitting into and fixing in the groove portion 22 (see Figure 4) of the rotating body 21, and a pair of L-shaped plate-shaped clamping portions 112 formed on the locking portion 111. The pair of clamping portions 112 are erected on the locking portion 111 so as to face each other in the width direction of the locking portion 111 . The tip ends 112a of the pair of clamping parts 112 are bent at a right angle to the base end and extend parallel to the locking part 111. The base ends 112b of the pair of clamping parts 112 are sewn to the brush 120 with one sewing thread 113 in a state in which they clamp one end of the brush 120 in the width direction Y.

[0029] The base 110 is formed by extrusion molding of a thermoplastic synthetic resin. An example of the thermoplastic synthetic resin is a flexible olefin-based elastomer having a durometer hardness of D40 to D50 measured in accordance with JIS K7215. Because the base 110 is flexible, it can be bent flexibly, and as shown in FIG. 3, the cleaning element 100 can be easily attached by inserting it into a recessed groove 22 formed by twisting the cleaning element 100 approximately 180 degrees in the circumferential direction of the rotating body 21.

[0030] The width of the locking portion 111 in a direction intersecting (orthogonal to) the longitudinal direction of the base 110 is slightly larger than the width of the openings 22a of the grooves 22 of the rotating body 21. When attaching the cleaning body 100 to the rotating body 21, the base 110 is inserted into each groove 22 while sliding from one end of the rotating body 21 so that the brush 120 protrudes outward from the openings 22a of the grooves 22, whereby the base 110 is inserted in a spirally twisted state along each groove 22, and attachment of the cleaning body 100 to the rotating body 21 is completed.

[0031] (2.2) Brush As shown in FIG. 5(b), the brush 120 has threads 121 that extend continuously in an arch shape, and are raised so that the threads cross and overlap at an angle inclined in different directions (indicated by arrows R1 and R2 in FIG. 5(b)) on a front surface 120A and a back surface 120B of the arch. The angle Θ at which the arch is obliquely inclined is in the range of 15 degrees to 75 degrees with respect to the longitudinal direction of the cleaning element 100. As the arches are obliquely inclined, crossing and overlapping, there are fewer gaps between the threads, which prevents the scraped fibrous material to be cleaned from entering the brush 120 and preventing it from getting wrapped around the brush 120.

[0032] Specifically, as shown in FIG. 6(a), the brush 120 is folded in half along the central part C in the short direction (indicated by the dashed line CC in FIG. 6(a)) with the thread 121 woven in a zigzag pattern so that it folds back (see the dashed arrows in the figure), and as shown in FIG. 6(b), the folded ends are joined in a state where they are offset in the longitudinal direction (indicated by the arrows X1 and X2 in FIG. 6(b)), thereby forming arches that are inclined in different directions on the front and back surfaces, and overlapping so that there are no gaps.

[0033] That is, the brush 120 is formed as a knitted fabric by integrally holding the base ends (on the curved portion 123 side) of multiple parallel-arranged U-shaped threads 121 together with two holding threads 122 that extend straight and parallel to each other in the direction in which the multiple threads 121 are arranged. Note that, as shown in Fig. 5, in the cleaning element 100, the two holding threads 122 are arranged between a pair of clamping portions 112. The holding thread 122 is made of a fiber that is highly durable and flexible. Examples of fibers that satisfy these conditions include rayon fiber, cupra fiber, polyester fiber, polyamide fiber, acrylic fiber, and polypropylene fiber. The holding thread 122 may be made of polyester fiber and may include a heat-melting fiber that melts when heated.

[0034] The thread 121 constituting the brush 120 preferably has a wire diameter of 0.05 mm to 0.5 mm. In particular, by using a polyamide or polypropylene filament thread with a wire diameter of 0.05 mm to 0.2 mm, the cleaning element 100 has a certain degree of flexibility and can suppress noise when it comes into contact with the object to be cleaned. In this embodiment, polyamide multifilament yarn (with a diameter of 0.09 mm per fiber) having a cotton count of 1900T (decitex) / 24F (filament) is used for the thread 121. Polyamide fiber has excellent abrasion resistance and recovery properties, making it suitable for use in the cleaning element 100.

[0035] The threads 121 constituting the brush 120 may be made of conductive fibers such as carbon fibers or synthetic resin fibers mixed with carbon. Static electricity does not easily accumulate in conductive yarns, and dust scraped or wiped off by brush 120 is prevented from adhering to brush 120 due to static electricity. This makes it easier for dust scraped or wiped off by brush 120 to be released from brush 120 when it is sucked up with a vacuum cleaner, for example.

[0036] (2.3) Formation of cleaning body When forming the cleaning body 100, first, the brush 120 is folded in half along the central part C in the short direction with the thread 121 woven in a zigzag pattern so that it folds back, and the folded ends are joined while being shifted in the longitudinal direction between a pair of clamping parts 112 of the base 110, and the base end on the holding thread 122 side is inserted, so that the base end of the brush 120 is clamped by the clamping parts 112. In this state, for example, an industrial sewing machine (not shown) is used to sew the clamping part 112 and the base end of the brush 120 including the holding thread 122 together with sewing thread 113, thereby joining the clamping part 112 to the brush 120 at the portion where the holding thread 122 is located. This results in the cleaning element 100 shown in FIG. 5.

[0037] (3) Action and effect of the rotating cleaning body When using the vacuum cleaner, as shown in Figure 2, when the vacuum cleaner is operated with the vacuum cleaner head 10 placed on the floor surface FL, the motor 17 is driven to rotate, and the air inside the partition plate 14 passes through the air suction port 15 and is sucked into the main body of the vacuum cleaner (not shown) via the connecting pipe 12 (see arrow S in the figure).

[0038] At this time, the rotating cleaning body 20 rotates counterclockwise in FIG. 2 (the direction indicated by the arrow R in FIG. 2) in conjunction with the rotational drive of the motor 17, and the cleaning body 100 of the rotating cleaning body 20 comes into contact with the floor surface FL, and fibrous debris and dust on the floor surface FL are scraped off by the cleaning body 100 and sucked into the main body of the vacuum cleaner (not shown) together with air.

[0039] At this time, the rotating cleaning body 20 rotates in the direction of arrow R shown in Figure 4, and the tip of the brush 120 of the cleaning body 100 comes into contact with the floor surface FL, elastically deforming upstream in the rotation direction and causing part of the thread 121 of the brush 120 to come into contact.

[0040] When the floor surface FL is made of wood, the brush 120 can sweep up dust on the floor as well as fibrous debris such as hair and lint, which is then sucked into the air suction port 15.

[0041] If the floor surface FL is a carpet or mat, the brush 120 can scrape away dust near the floor surface FL and catch fibrous debris. At this time, some of the fibrous debris may wind around the rotary cleaning body 20 without being sucked into the air suction port 15, but the brush 120 has threads 121 that extend continuously in an arch shape, and the threads cross and overlap at an angle in different directions on the front surface 120A and the back surface 120B of the arch, so there are few gaps between the threads and the scraped fibrous debris is less likely to penetrate into the brush 120, preventing it from winding around the brush 120.

[0042] In addition, the brush 120 has threads 121 that extend in a continuous, arched shape, and the threads cross and overlap at an angle in different directions on the front surface 120A and the back surface 120B of the arch, which makes it possible to strengthen the stiffness of the threads 121 without connecting them themselves, thereby improving the dust pickup ability. Furthermore, even if a relatively small thread 121 having a wire diameter of, for example, 0.1 mm is used, a certain level of pickup ability is maintained, and even if the tip of the brush 120 comes into contact with the floor surface FL, noise generation can be suppressed. [Example]

[0043] FIG. 7 is a diagram showing the configurations of the cleaning element of the example and the cleaning element of the comparative example, FIG. 8 is a diagram showing the results of the hair entanglement test, FIG. 9 is a diagram showing the results of the pick-up test, and FIG. 10 is a diagram showing the results of the noise test. The following describes performance evaluations of tangle prevention, pickup, and noise of examples that further embody the present embodiment, in comparison with comparative examples.

[0044] (Example) The thread 121 is made of polyamide monofilament thread with a thickness of 0.09 mm, and extends in the longitudinal direction (X direction) in a continuous arch shape, with the front and back surfaces of the arch inclined in different directions, and the brush 120 is raised so that the threads cross and overlap, with a thread density of 480 F / cm.When used as a rotating cleaning body, the cleaning body 100 has a contact amount of 1.0 mm with the floor surface FL. (Comparative Example 1) A brush 130A was formed using 0.2 mm thick polyamide monofilament yarn with a raised nap to give a yarn density of 300 F / cm, and a cleaning body 100A was produced that, when used as a rotating cleaning body, would have a contact depth with the floor surface FL of 0.5 mm. In addition, a brush 130B was formed using carbon fiber with a thickness of 0.001 mm, with the fibers raised to a thread density of 60,000 F / cm, and a cleaning body 100B was produced that, when used as a rotating cleaning body, has a contact depth with the floor surface FL of 0.5 mm. (Comparative Example 2) A brush 130C was formed using 0.2 mm thick polyamide monofilament yarn with a raised nap to give a yarn density of 108 F / cm, and a cleaning body 100C was produced that, when used as a rotating cleaning body, has a contact depth with the floor surface FL of 0.5 mm. Further, an extrusion blade 130D was formed using a thermoplastic elastomer, and a cleaning element 100D was manufactured in which, when made into a rotary cleaning element, the contact amount with the floor surface FL was 0.5 mm. The cleaning elements of the example and comparative examples 1-4 were manufactured and mounted as rotary cleaning elements in a commercially available electric vacuum cleaner, and a hair entanglement test, a pick-up test, and a noise test were carried out.

[0045] Hair tangle test The sample used for the hair entanglement test as the fibrous object to be cleaned was 100% hair, with a sample weight of 0.283±0.005 g and a sample length of 20-45 cm. The test area for the floor surface FL was a 303 mm x 1818 mm wooden flooring board, and the sample samples were randomly placed on the board. The recovery rate after all samples were collected was evaluated as the hair entanglement rate. Here, the hair entanglement rate was calculated as the number of hairs (g) remaining in the vacuum cleaner head 10 after the test / the number of hairs (g) before the test x 100 (%).

[0046] The results of the hair entanglement test are shown in Figure 8. According to this, the evaluation results showed that the hair entanglement rate was 0.1% for the cleaning element 100 of the example, 49.0% for the cleaning elements 100A and 100B of comparative example 1, and 0.8% for the cleaning elements 100C and 100D of comparative example 2. In other words, it was confirmed that almost no hair entanglement occurred in the cleaning element 100 of the example.

[0047] Pick-up test The pickup test was conducted in accordance with JIS C 9108 (2017), with the sample samples shown in Figure 9(a) randomly placed on a 303mm x 1818mm wooden floor board as the floor surface FL, and the pickup performance was evaluated by measuring the number of sample samples in the vacuum cleaner dust box after the test.

[0048] Figure 9(b) shows the results of the pickup test. According to this, for silica sand (small particle size dust), the pickup rate was over 95% and there was no difference. Regarding resin pellets (large particle size dust), the pickup rate was 88.9% for the Example, 93.6% for Comparative Example 1, and 91.0% for Comparative Example 2, resulting in slightly lower pickup rates for the Examples. Regarding lint, tangling of lint occurred in Comparative Example 1.

[0049] "Noise test" The noise test was conducted in accordance with JIS C 9108 (2017), with the cleaning element placed against a wooden flooring board as the test surface and running it back and forth twice, and the peak value of the noise (3500Hz-5000Hz) generated was taken to evaluate noise and quietness. The results of the noise test are shown in Figure 10. According to this, in the range of 3500Hz-5000Hz, the Example produced the lowest noise, followed by Comparative Example 1. Comparative Example 2 produced a high noise when the blade came into contact with the floor (wooden flooring).

[0050] In this embodiment, the thread 121 constituting the brush 120 is a polyamide or polypropylene filament thread having a diameter of 0.05 mm to 0.5 mm, but the diameter, material, and thread density of the thread 121 may be selected appropriately depending on the intended use of the cleaning element 100. For example, if low noise is required, the diameter may be set to, for example, 0.05 mm to increase the flexibility of the brush 120. In addition, when sewing the clamping portion 112 of the base 110 and the base end of the brush 120 together, the angle of inclination of the arch can be adjusted by changing the amount by which the folded ends are shifted longitudinally, thereby allowing for fine adjustment of the amount of contact (nip amount) with the floor surface FL. [Explanation of symbols]

[0051] 10. Vacuum cleaner head 20 Rotating cleaning body 21 Rotating body, 22 Groove portion 100...Cleaning body 110: base; 111: engaging portion; 112: clamping portion; 113: sewing thread 120 Brush, 121 Thread, 122 Holding thread

Claims

1. The base and The yarn is folded in two along the center of the short side in a zigzag weave so that it folds back, and the folded ends are joined in a state where they are offset in the longitudinal direction, so that the brush extends continuously in an arch shape in the longitudinal direction of the base, and the brush is raised so that the front and back surfaces of the arch are inclined in different directions, crossing and overlapping without any gaps. A cleaning body characterized by:

2. The angle at which the arch is inclined is in the range of 15 degrees to 75 degrees with respect to the longitudinal direction of the cleaning body.

2. The cleaning element according to claim 1.

3. The base end of the brush is clamped by the base in the longitudinal direction and fixed to the base by sewing.

3. The cleaning element according to claim 1 or 2.

4. a rotor having a groove formed on its outer circumferential surface; The cleaning element according to any one of claims 1 to 3, wherein the base is fitted into the groove and attached. A rotating cleaning body characterized by:

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