JPH0556887B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a vacuum cleaner having running wheels attached to a base.

(b) Conventional technology The so-called canister-type vacuum cleaners are mainstream, but since the canister-type vacuum cleaners have a relatively small dust collection capacity, they are not used particularly for collecting dust from shops, offices, etc. A vacuum cleaner with a large dust capacity was desired.

However, increasing the size of the dust collection chamber in a canister-type vacuum cleaner increases the size and weight of the vacuum cleaner, making it difficult to use and requiring a large mold, making it expensive. , there is a problem that places a huge economic burden on consumers.

Therefore, as shown in Japanese Utility Model Application Publication No. 52-37973, for example, there is a vacuum cleaner that uses a so-called pail can as a dust collection case and places this dust collection case on a base with wheels. It has been developed. In this configuration, since the pail can is used as a dust collection case, there is no need to make a large investment in molds, the product can be manufactured at low cost, and there is an advantage that the economic burden on consumers can be reduced.

However, in the configuration disclosed in the above publication, the axle of the wheel is fixed to the base with a nut, and there is a risk that the nut may loosen due to vibrations from running or the electric blower accompanying the cleaning operation, and the wheel may come off. It was hot.

(c) Problems to be Solved by the Invention An object of the present invention is to provide a vacuum cleaner that has a simple structure and can eliminate failures in the wheel mounting portion.

(d) Means for Solving the Problems The present invention covers the top opening of a dust collection case provided with a suction port on the side surface with a main body housing an electric blower so as to be openable and closable, and also provides wheels on the bottom surface of the dust collection case. In the device for fixing the attached base, the base is provided with a fitting part for the dust collection case having an upwardly directed annular groove into which the peripheral edge of the bottom surface of the dust collection case is fitted, and the support metal fitting for attaching the wheels is provided. , a substrate fixed to the lower surface of the base; a support piece bent upward from the substrate and abutted against the wall surface of the fitting portion; and a wheel pivot formed downward from the substrate. It is characterized by having a piece.

(E) Effect According to the above configuration, the bottom peripheral edge of the dust collection case is fitted into the upward annular groove of the fitting part of the base, and the wheel support fittings have the base plate on the bottom surface of the base and the support piece on the bottom surface of the dust collection case. They are fixed in contact with the wall surfaces of the fitting portions of the base, respectively.
Since the peripheral edge of the bottom of the dust collection case fitted in the annular groove is located outside the wall of the fitting part, the rigidity of the wall of the fitting part is high, and the support bracket is attached to the wall of the fitting part. Since the support pieces are in contact with each other, the external force that is applied to the base and wheels when the vacuum cleaner is running is received by this highly rigid part. It will not be damaged, and the mounting condition will not loosen and the mounting position will not shift or the support fittings will not come off.

(f) Example The vacuum cleaner of the present invention will be described below with reference to FIGS. 1 to 8.

1 is a top opening 2 consisting of a bottomed cylindrical metal screw body;
This dust collection case is provided with an air intake port 4 for connecting a suction hose 3 on the side surface, and a disposable bag-shaped filter (not shown) communicating with the air intake port 4 is removably housed therein.

Reference numeral 5 denotes a main body of a vacuum cleaner which covers the upper opening 2 of the dust collection case 1 in a freely openable and closable manner, and has a handle 6 on the upper part and houses electrically transmitted items such as an electric blower 7. It is integrated with the dust collection case 1 by locking the clamp means 8, 8.

Reference numeral 9 denotes a synthetic resin wheel mounting base larger than the outer circumferential surface of the dust collecting case 1, which fits and fixes the lower bottom surface 10 of the dust collecting case 1 into the fitting hole 11, which is a fitting part, and includes a pair of caster wheels 12. By attaching a pair of traveling wheels 13 to the vehicle, the entire vehicle can be moved. In the wheel mounting base 9, a fourth
As shown in FIG. 6, FIG. 8, the upward annular groove 15 is
In addition, a plurality of dust collection case fixing claws 16 are provided on the wall surface of the upward annular groove 15 and are distributed around the circumferential surface of the annular groove 15, and four insertion holes are provided on the lower surface of the upward annular groove 15. Holes 17... are bored. Then, the lower bottom surface 10 of the dust collection case 1
A peripheral folded part 18 formed on the peripheral edge of the lower bottom surface 10 by folding back the peripheral edge part and the side lower end part of each other.
By fitting into the upward annular groove 15 from above, the lower bottom surface 10 of the dust collection case 1 is attached to the wheel mounting base 9 while being prevented from coming off by the fixing claws 16. ing.

Reference numeral 19 denotes a metal chain for preventing static electricity, which discharges static electricity generated in the dust collection case 1 due to dust collection to the ground surface, and is fixed to the peripheral folded portion 18 with a chain attachment screw 20. The upward annular groove 15
A downward notch hole 21 communicating with the through hole 17 is bored in the wall surface corresponding to one of the through holes 17.The chain mounting screw 20 is fitted into the notch hole 21 and the chain 19 is inserted into the through hole 17. By hanging downward from the notch hole 21, rotation of the dust collection case 1 relative to the wheel mounting base 9 is prevented.

As shown in FIG. 1, the caster wheels 12 have their caster pedestals 12a fixed to the lower surface of the wheel mounting base 9 with screws 22, and the traveling wheels 14 are attached to the wheel mounting base 9 by means of support fittings 23. Fixed to the bottom.

The support fittings 23 are shown in FIGS. 1, 4, 5,
As shown in FIG. 7, a base plate 24 is formed by bending a metal plate, a supporting piece 25 is formed by projecting sideways from the base plate 24 and bent upward, and a wheel is formed by bending downward from the base plate 24. Balance 2
6, the end of the base plate 24 and the wheel pivot piece 26
A reinforcing flange 27 is formed across the end of the flange. The traveling wheel 13 is attached to the wheel pivot piece 26.
is rotatably supported, and the support piece 25 abuts against the inner wall 14 of the fitting hole 11 from between positioning protrusions 28, 28 formed on the lower surface of the upward annular groove 15 of the wheel mounting base 9. With the board 24 hooked up, screw the screws 29 onto the lower surface of the wheel mounting base 9.
It is fixed in place. Therefore, the support piece 25 is in contact with the circumferential folded part 18 of the dust collection case 1 which is fitted and fixed in the upward annular groove 15 of the wheel mounting base 9 via the inner wall 15, and the corresponding contact portion is Since the rigidity of the peripheral folded portion 18 is extremely high, the wheel mounting base 9 may be damaged due to collisions with walls or obstacles when the vacuum cleaner is running during cleaning.
Even if an external force is applied to the running wheel 13 from any angle, it will be received by the contact portion, and therefore,
The contact portion is not damaged, the mounting position of the support fitting 23 to the wheel mounting bracket 23 is not shifted, and the mounting state of the support fitting 23 to the wheel mounting base 9 is not loosened. Support metal fittings 23
It never comes off.

(G) Effects of the Invention As described above, according to the present invention, since the bottom peripheral edge of the dust collection case is fitted into the annular groove formed in the fitting part of the base, the rigidity of the fitting part is improved. However, since the support piece of the wheel support fitting is brought into contact with the wall surface of the fitting portion of the base, the mounting strength of the wheel support fitting is improved. Therefore, even if an external force is applied to the wheels or the base due to a collision with an obstacle or a wall, the mounting position of the damaged support fitting will not shift.

[Brief explanation of the drawing]

The drawings all relate to the vacuum cleaner of the present invention.
The figure is a bottom view, the second figure is a perspective view, the third figure is a side view,
Figure 4 is a cross-sectional view of Figure 1 A-A, Figure 5 is Figure 1 B
-B arrow view, Fig. 6 is a sectional view of Fig. 1 C-C, Fig. 7
The figure is a side view of a support fitting that pivotally supports a traveling wheel, and FIG. 8 is a perspective view of a main part with a part of the wheel mounting base cut away. DESCRIPTION OF SYMBOLS 1... Dust collection case, 5... Main body, 9... Wheel mounting base, 11... Fitting hole (fitting part), 13... Running wheel, 15... Upward annular groove, 23... Support Metal fitting, 24... Board, 25... Support piece, 26...
Wheel pivot piece.

Claims (1)

[Claims] 1. A case in which a top opening of a dust collection case with a suction port on the side surface is covered with a main body housing an electric blower so as to be openable and closable, and a base with wheels attached to the bottom of the dust collection case is fixed to the bottom of the dust collection case, wherein the base is provided with a fitting part of the dust collecting case having an upward annular groove into which the peripheral edge of the bottom surface of the dust collecting case is fitted, and the supporting metal fitting for attaching the wheel is provided with a substrate fixed to the lower surface of the base; A vacuum cleaner comprising: a support piece bent upward from the base plate and brought into contact with a wall surface of the fitting portion; and a wheel pivot piece bent downward from the base plate. .