JP2002360470A - Roller main body, suction hole body and vacuum cleaner main body for vacuum cleaner and vacuum cleaner equipped with this suction hole body or cleaner main body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller main body for a vacuum cleaner by which amount of displacement along the axial direction of the roller can be decreased and a factor for generating wear can be lowered. SOLUTION: A shaft 28 and a roller 25 being held so as to be able to be rotated on this shaft 28 are provided and a shaft through-hole is formed of small diameter hole parts 27a positioned toward both ends of the shaft 28 and a large diameter hole part 25a positioned between the small diameter hole parts 27a in the roller 25 and small diameter shaft parts 28a positioned in the small diameter hole parts 27a and a large diameter shaft part 28b positioned in the large diameter hole part 25a are formed in the shaft 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller body mounted on a suction opening or a cleaner body.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a vacuum cleaner 1 has a built-in electric blower 2 and a dust collecting filter 3, and one end is connected to the vacuum cleaner main body 4. And a suction body 6 connected to the other end of the hose body 5 are well known.

The hose body 5 has a bellows-shaped hose 9 having a connection portion 7 for connection to the vacuum cleaner body 4 fixed at one end and a hand-operated tube 8 at the other end, and a hand-operated tube 8.
And an extension tube 10 connected to the The extension pipes 10 are provided as a pair in front and rear, and can be connected to each other. In addition, any extension pipe 10 can be connected to the hand operation pipe 8 and the suction port body 6. . Alternatively, only one of the extension pipes 10 may be used at the convenience of use.

[0004] The suction port body 6 includes a connection pipe 11 connected to the extension pipe 10 (or the operation pipe 8 at hand), and a main body 12 rotatably (swingably) connected to the connection pipe 11. .

As shown in FIG. 5, a suction opening 12b is formed in a bottom surface 12a of the main body 12. Further, the body 12 is provided with a roller 13 and a roller body 14 for assisting the movement of the suction port body 6 on the surface to be cleaned by operating the hand operation pipe 8 at a position sandwiching the suction opening 12b. .

The roller 13 has a shaft 13a on which a roller body 13b made of rubber or the like is mounted, and both ends of the shaft 13a are rotatably held by holding portions (not shown) provided on the bottom surface 12a. .

As shown in FIG. 4, the roller body 14 includes a substantially cylindrical resin roller 15, a protective member 16 such as a raised cloth or cloth covering the outer surface of the roller 15, and both sides of the protective member 16. It has a pair of sleeves 17 that hold the edges together with both end surfaces of the roller 15 and a metal shaft 18 whose both ends are held between opposing inner wall surfaces 12d of a holding recess 12c provided on the bottom surface 12a. ing.

The sleeve 17 is an integrally molded product of synthetic resin or the like, and has a shaft portion 17b formed with a small-diameter hole portion 17a and a wall surface for holding both side edges of the protection member 16 together with both end surfaces of the roller 15. An abutment flange 17d having a contact 17c;
A flange 17e formed at an end of the shaft portion 17b.

The sleeve 17 is held by the roller 15 by pressing the shaft portion 17b into the large-diameter hole 15a of the roller 15. Therefore, a shaft through hole through which the shaft 18 passes is formed by the small diameter hole portion 17a of the sleeve 17 and the large diameter hole portion 15a near the center where the sleeve 17 is not located.

In such a configuration, when the bottom surface 12a of the suction opening body 12 faces the surface to be cleaned (particularly in the case of a floor or a tatami mat) and is operated in the front-rear direction of the hand control tube 8, the operation is interlocked. As the rollers 13 and 14 rotate, the suction port body 12 moves in the front-rear direction.

[0011]

In the suction port constructed as described above, since the shaft 18 has the same diameter, the roller tends to be displaced along the axial direction when the roller rotates. .

Therefore, at the shaft contact portion of the sleeve 17,
The friction in the rotational direction and the displacement direction of the roller body 14 is generated, which causes a problem that the shaft contact portion is easily worn out.

When the roller body 14 is displaced along the axial direction, the end face of the sleeve 17 comes into contact with the inner wall surface 12d, so that sound is likely to be generated. There was also the problem of getting lost.

In order to solve the above-mentioned problems, the present invention provides a roller body for a vacuum cleaner which can reduce the amount of displacement of the roller along the axial direction and can reduce the cause of wear. Aim.

Another object of the present invention is to provide a roller body for an electric vacuum cleaner, which makes it difficult for a cleaner or the like to hear abnormal noise caused by displacement of the roller.

[0016]

According to a first aspect of the present invention, there is provided a roller body for a vacuum cleaner, comprising: a shaft; and a roller rotatably held on the shaft. The shaft has a through hole formed by a small-diameter hole located near both ends of the shaft and a large-diameter hole located between the small-diameter holes, and the shaft has a small diameter located at the small-diameter hole. The gist is that a shaft portion and a large-diameter shaft portion located in the large-diameter hole portion are formed.

According to a second aspect of the present invention, there is provided a suction port body having a holding recess formed on a bottom surface, a shaft held between inner walls of the holding recess facing each other, and rotatable about the shaft. And a roller body having a roller body partly protruding from the bottom surface, the roller having a small-diameter hole portion penetrated by the shaft and located near both ends thereof, and the small-diameter hole. A shaft through-hole including a large-diameter hole located between the portions is formed, and the shaft has a small-diameter shaft located at the small-diameter hole and a large-diameter shaft located at the large-diameter hole. The gist is that

The suction port body according to claim 3, wherein the large-diameter hole is larger than a separation distance between the inner wall surface and an end face of the roller with reference to a state in which the roller is located at the center of the holding recess. The gist is that the distance between the side wall surface of the portion and the end surface of the large-diameter shaft portion is reduced.

According to a fourth aspect of the present invention, in the vacuum cleaner main body, the main body has a holding recess formed near a corner formed by a bottom surface and a rear wall, and extends between opposed inner wall surfaces of the holding recess. In a vacuum cleaner main body including a held shaft and a roller main body having a roller rotatably held by the shaft and partially projecting from the vicinity of the corner, the shaft passes through the roller, and A shaft through hole comprising a small-diameter hole located near both ends thereof and a large-diameter hole located between the small-diameter holes is formed, and the shaft has a small-diameter shaft located at the small-diameter hole and the large-diameter hole. The gist is that a large-diameter shaft portion located in the hole is formed.

According to a fifth aspect of the present invention, in the vacuum cleaner main body, the diameter is larger than a separation distance between the inner wall surface and an end surface of the roller with reference to a state in which the roller is located at the center of the holding recess. The gist is to reduce the distance between the side wall surface of the hole and the end surface of the large-diameter shaft portion.

According to a fifth aspect of the present invention, there is provided a vacuum cleaner according to the second aspect.
The gist of the present invention is to provide at least one of the suction port body and the vacuum cleaner main body according to the present invention.

[0022]

Next, an embodiment of the present invention will be described with reference to the drawings. The appearance of the vacuum cleaner and the suction port body in the state shown in FIGS. 5 and 6 are the same, so that the illustration thereof is omitted, and the roller body 24 corresponding to the roller body 14 shown in FIG. explain.

In FIG. 1, the holding recess 1 of the suction port body 12 is shown.
The roller main body 24 mounted on the roller 2 c includes a substantially cylindrical resin roller 25, a protection member 26 such as a raised cloth or cloth covering the outer surface of the roller 25, and both side edges of the protection member 26. A pair of sleeves 2 that are held together with both end faces
7 and a metal shaft 28.

The sleeve 27 is an integrally molded product of a synthetic resin or the like, and has a shaft portion 27 b having a small-diameter hole 27 a formed thereon and a wall surface for holding both side edges of the protection member 26 together with both end surfaces of the roller 25. A contact flange 27d having a contact 27c;
A flange 27e formed at an end of the shaft 27b and a rib 27f protruding toward the center of the small-diameter hole 27a are provided.

The sleeve 27 has a shaft portion 27b and a roller 25.
Is held by the roller 25 by press-fitting into the large-diameter hole portion 25a. Therefore, the small-diameter hole 27a of the sleeve 27 and the large-diameter hole 25 near the center where the sleeve 27 is not located.
a forms a shaft through hole through which the shaft 28 passes.

The diameter of the opening of the hole 25a of the roller 25 is
The diameter becomes smaller toward the center from both ends. Conversely, the opening diameter of the small-diameter hole portion 27a is larger toward the opposite side of the flange 27e, that is, toward the tip of the roller 25 that is pressed into the hole 25a. This is formed as a draft for removing a mold for forming the small-diameter hole portion 27a when the sleeve 27 is molded with resin.

As shown in FIG. 2, the rib 27f protrudes from the inner wall surface of the small-diameter hole 27a in the vertical and horizontal directions at four equally-divided points toward the axis. Further, the rib 27f is formed across the substantially entire length of the small-diameter hole 27a along the axial direction, and the ridgeline of the protruding tip is parallel to the axis.

When the suction port body 22 is actually used, as shown in FIG. 3, the distal end of the rib 27f located below and the outer periphery of the shaft 28 closer to the lower side linearly slide along the axial direction. . Thus, the rib 28f comes into sliding contact with the shaft 28 in a long range corresponding to substantially the entire length of the rib 27f.

At the center of the shaft 28, large-diameter shaft portions 28b having a diameter larger than the diameter of the small-diameter shaft portions 28a located at both ends thereof are formed.

The diameter of the small-diameter shaft portion 28a is smaller than that of the small-diameter hole portion 27.
The diameter of the large-diameter shaft portion 28b is slightly smaller than the opening diameter of the opening a (the minimum diameter of the ridge line of the rib 27f as a tangent line). ) Is slightly smaller than the diameter. Further, the width W1 of the large-diameter shaft portion 28b along the axial direction is set to be narrower than the facing interval W2 of each sleeve 27 located at both ends of the roller 25, whereby the roller 25 is positioned at the center. A gap W3 is formed between the tip of the shaft portion 27b and the stepped end surface of the large-diameter shaft portion 28b with reference to the time when it is present.

The gap W3 is set to be smaller than the gap W4 between the end face of the roller 25 and the inner wall surface 12d of the holding recess 12c with reference to when the roller 25 is located at the center.

In such a configuration, when the bottom surface 22a of the suction port body 22 is faced to the surface to be cleaned (particularly in the case of a floor or a tatami mat), when the hand operation tube 8 is operated in the front-rear direction, the operation is interlocked with the operation. As the rollers 23 and 24 rotate, the suction port body 22 moves in the front-rear direction.

At this time, when the roller 25 is displaced along the axis of the shaft 28 by the operation of moving the suction port body 12 (for example, moving in an oblique direction), the shaft portion 27b of the sleeve 27 located on the opposite side to the direction of the displacement. Abuts on the step end surface of the large-diameter shaft portion 28b to regulate the maximum displacement amount.

Accordingly, in combination with the fact that the gap W3 is narrower than the gap W4, the amount of displacement of the roller 25 on the shaft 28 can be regulated to be small, and the ribs accompanying the axial displacement of the roller 25 can be restricted. Wear of 27f is limited to a small extent.

The tip of the shaft 27b is a large-diameter shaft 28b.
Abnormal noise is generated when it comes into contact with the step end surface of the roller 25. Since the abnormal noise is generated inside the roller 25, there is little noise leakage outside the roller 25, and the cleaning worker can hear the abnormal noise. It has become difficult.

In the above embodiment, the roller 25 provided on the suction port body 12 has been described.
As shown in FIG. 3, the present invention can be applied to a member constituting another vacuum cleaner, such as a roller 29 provided at a corner of a boundary portion between the bottom surface and the rear wall of the cleaner body 4.

The roller 29 prevents the corners from coming into contact with the surface to be cleaned when the front end of the cleaner body 4 is lifted, and is used as a leg when the cleaner body 4 is placed vertically. The roller itself provided at such a site is known.

[0038]

As described above, the roller body for a vacuum cleaner according to the first aspect, the suction opening body according to the second aspect,
In the vacuum cleaner main body according to the fourth aspect, the roller has a shaft through-hole formed of a small-diameter hole located near both ends of the shaft and a large-diameter hole located between the small-diameter holes. The shaft is formed with a small-diameter shaft portion located in the small-diameter hole portion and a large-diameter shaft portion located in the large-diameter hole portion. Can be reduced.

According to a third aspect of the present invention, in the vacuum cleaner body according to the fifth aspect, the inner wall surface and the roller are positioned on the basis of a state in which the roller is located at the center of the holding recess. By making the separation distance between the side wall surface of the large-diameter hole portion and the end surface of the large-diameter shaft portion smaller than the separation distance from the end surface, the noise caused by the displacement of the roller is hardly heard by a cleaner or the like. Can be.

[Brief description of the drawings]

FIG. 1 shows a roller body for a vacuum cleaner according to an embodiment of the present invention, wherein (A) is a front view of the roller, and (B) is a longitudinal sectional view of the roller.

FIG. 2 (A) is an enlarged longitudinal sectional view of a sleeve,
FIG. 2B is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a side view of the cleaner body.

FIG. 4 shows a conventional roller body for a vacuum cleaner, and (A)
Is a front view of the roller, and (B) is a longitudinal sectional view of the roller.

FIG. 5 is a bottom view of the suction port body.

FIG. 6 is an external perspective view of the vacuum cleaner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner 12 ... Suction port body 12a ... Bottom surface 12c ... Holding recessed part 12d ... Inner wall surface 25 ... Roller body 25a ... Large diameter hole 27 ... Sleeve 27a ... Small diameter hole 27f ... Rib 28 ... Shaft 28a ... Small diameter shaft part 28b: Large diameter shaft

Claims (6)

[Claims] 1. A small-diameter hole portion which is provided between a small-diameter hole portion which is located near both ends of a shaft and a roller which is rotatably held by the shaft. A shaft through hole comprising a diameter hole portion is formed, and the shaft is formed with a small diameter shaft portion located at the small diameter hole portion and a large diameter shaft portion located at the large diameter hole portion. Roller body for vacuum cleaner. 2. A suction port main body having a holding recess formed on a bottom surface, a shaft held between mutually facing inner wall surfaces of the holding recess, and a shaft rotatably held by the shaft and one from the bottom surface. A roller main body having a roller with a protruding portion, wherein the roller has a small-diameter hole portion penetrated by the shaft and located near both ends thereof, and a large-diameter hole portion located between the small-diameter hole portions. Wherein the shaft is formed with a small-diameter shaft portion located in the small-diameter hole portion and a large-diameter shaft portion located in the large-diameter hole portion. body. 3. A side wall surface of the large-diameter hole portion and the large-diameter shaft which are larger than a separation distance between the inner wall surface and an end surface of the roller with reference to a state in which the roller is located at the center of the holding concave portion. 3. The suction opening according to claim 2, wherein the distance between the end portion and the end surface is reduced. 4. A main body in which a holding recess is formed near a corner formed by a bottom surface and a rear wall, a shaft held between mutually facing inner wall surfaces of the holding recess, and rotatable about the shaft. A vacuum cleaner main body having a roller body having a roller partly protruding from the vicinity of the corner portion, wherein the roller has a small-diameter hole portion through which the shaft penetrates and is located near both ends thereof. A shaft through-hole including a large-diameter hole located between the small-diameter holes is formed, and the shaft has a small-diameter shaft located at the small-diameter hole and a large-diameter shaft located at the large-diameter hole. The main body of the vacuum cleaner characterized by having formed. 5. A side wall surface of the large-diameter hole portion and the large-diameter shaft which are larger than a separation distance between the inner wall surface and an end surface of the roller with reference to a state in which the roller is located at the center of the holding concave portion. The vacuum cleaner main body according to claim 4, wherein a separation distance from an end surface of the portion is reduced. 6. An electric vacuum cleaner comprising at least one of the suction port body and the electric vacuum cleaner body according to claim 2. Description: