JPH0685750B2 - Upright vacuum cleaner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an upright type vacuum cleaner, and particularly to a belt cover suitable for protecting a belt.

[Conventional technology]

The upright vacuum cleaner is provided with a rotating brush on the suction body, and the rotating brush is configured to transmit power from a shaft of an electric blower for sucking dust via a belt and rotate. A belt cover is attached to the belt for the purpose of protection. The conventional belt cover is fixed to the back plate of the main body with a tightening screw as described in Japanese Utility Model Laid-Open No. 55-60431.

[Problems to be solved by the invention]

The belt varies depending on the frequency of use and the state of use,
It needs to be replaced as it expires in about 1-2 years.

However, in the technique described in Japanese Utility Model Laid-Open No. 55-60431, since the back plate of the main body is fixed with a tightening screw, a tool for removing the screw is required, and it is difficult to easily replace the belt. there were.

An object of the present invention is to solve the above-mentioned problems and to provide a belt cover that allows easy belt replacement.

[Means for solving problems]

In order to solve the above-mentioned problems, a feature of the present invention is that a belt cover that covers the belt is provided on the belt side of the base frame, and the belt cover has a rotating shaft and a knob and a claw at its end. The rotating shaft is inserted into a shaft hole provided in the base frame, the knob meshes with the rising of the bottom plate, and the claw meshes with the suction rib to fix the belt cover.

Further, a feature of the present invention is that when the belt cover is rotated about a rotation axis, the belt cover comes into contact with a rear wheel provided on the base frame.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a suction body 1 is provided so as to face a part of a rotary brush 23 in an opening 3 of a bottom plate 2, and the rotary brush 23 is via a belt 5 and an electric blower related to a dust suction operation drive unit. Power is transmitted from the shaft 90 of 6 to rotate.

The main body case 7 extends the operation handle 8 upward, has a dust collecting space 44 in the center, and is attached to the suction body 1 so as to be tiltable as shown by the solid line and the chain line in FIG. When not in use, it is constructed so that it can be leaned upright (shown by the solid line) on the mouthpiece 1 so as to stand upright.

In FIG. 2, W ₂ indicates the distance between the bottom plate 2 and the floor surface when standing upright, and W ₁ indicates the distance when in use.

The mouthpiece 1 is externally provided with a switch knob 10, a bumper 11 for preventing damage to furniture, a pedal 12 used when the body case 7 is locked on the body 1, and a base for pivotally supporting the body case 7. A frame 13 is arranged.

This switching knob 10 is a knob for adjusting the distance between the bottom plate 2 of the mouthpiece 1 and the surface to be cleaned. The height setting cam 14 is shown in FIG.
As shown in FIG. 3, a knob position spring portion 15 having a notch is provided in a part of the cylindrical side surface so as to have elastic force so as to be integrally connected and fixed at an arbitrary rotating position. It is what As shown in FIG. 4, the height setting cam 14 is provided with planes X, Y, and Z which are divided into substantially equal parts in the circumferential direction and which have steps in the direction of the knob axis. Abut.

The front wheel axle 16 has a crankshaft shape as shown in FIG. 4, and both ends 17 thereof are rotatably supported by the suction body 1. Front end wheels 18 for height adjustment are attached to the both ends 17. Further, as shown in FIG. 3, one end of the axle pushing lever 19 is pivotally attached to the suction body 1 and the other end is engaged with the main body case 7.
The lever is configured so as to contact a part of the both end portions 17 at the intermediate portion of the lever.

As shown in FIG. 5, a drive pulley 20 is provided at the front end portion of the mouthpiece body 1, and a brush brush 21 in which hair is planted in a spiral shape on the outer circumference.
Then, there is a rotary brush 23 which is divided into three parts in the longitudinal direction and is provided with the projections 22 which are also arranged in a spiral shape. The protrusions 22 are arranged on the front and back of the rotary brush 23 in a total of six places, and the brush brush
Reference numeral 21 is configured so that the spiral angle θ between the brushes is substantially constant as shown in FIG. 6 on the surface on which the protrusion 22 is not provided. The rotary brush 23 needs to have a relatively large wall thickness for the purpose of implanting bristles. For this reason, the rotary brush 23 is formed by plastic injection molding containing a foaming agent. In addition, the rotating brush 23 has a fixed shaft 24 with a hollow inside.
Is supported by bearings 25, bearing covers 26 are provided at both ends of the fixed shaft 24, and detachably attached to the suction body 1 via a vibration-proof cap 27 made of an elastic material. There is. The anti-vibration cap 27 not only vibrates and insulates the mouthpiece 1 of the rotary brush 23, but also has a lip portion 28 on the inner circumference thereof to prevent dust from entering the bearing 25. Further, a thrust spring 29 is provided between the bearing 25 and the bearing contact surface of the rotating brush 23 in order to adjust the play of the rotating brush 23 in the axial direction.

As shown in FIG. 7, at the rear end portion of the suction body 1, a rotary shaft 30 integrally provided on the body case 7 is rotated by a semi-circular bearing rib 31 provided on the suction body 1. There is a base frame 13 which has a semicircular bearing portion 32, which is also freely rotatably supported and is also shown in FIG. Here, the semicircular bearing rib 31 is
Although it has a rib shape because it is provided integrally with the suction body 1, it can be configured without forming a rib as a separate part from the suction body 1 as long as it has a semi-arcuate shape. As shown in FIG. 9, the base frame 13 has a substantially U shape when viewed from the bottom,
A rear wheel 33 is provided in the vicinity of the bearing portion 32, and the main body case 7 is locked in the vicinity of one bearing portion 32 at a position shown by a solid line and a chain line in FIG. 2 as shown in FIG. A lock arm 35 that abuts a locking portion 34 provided on the main body case 7.
Is equipped with. The lock arm 35 has a cylindrical portion 36, and a spiral urging spring 37 for urging the cylindrical portion 36 in the direction of the locking portion 34 with the cylindrical portion 36 as a rotation axis.
Further, the lock arm 35 is integrally provided with a flat surface portion 38 that comes into contact with the lower end of the pedal 12 when the pedal 12 is stepped on.
The locking between the locking portion 34 and the locking portion 34 is released. Here, the pedal 12 is attached with a support shaft 39 provided in the suction body 1 as a center of rotation, and when there is no depression, the urging force of the urging spring 37 causes the flat portion 38 and the lower end to come into contact with each other. Positioned. Further, the base frame 13 is provided with a belt cover 40 on the side where the belt 6 is suspended for safety. Belt cover 40
Has a rotating shaft 82 as shown in FIG.
Fit in the shaft hole 83 of. Further, the belt cover 40 is provided with a convex portion 84 for positioning so as to fit with the positioning hole 85 of the base frame 13. Next, a knob 86 is provided at the end of the belt cover 40 to engage with the rising 87 of the bottom plate 2 shown in FIG. 1, and at the same time, the pawl 88 is configured to engage with the mouthpiece rib 89.

As shown in FIG. 7, the dust passage in the suction body 1 is connected to the main body case 7 by communicating with the main body duct 42 by the suction duct 41.

The main body case 7 is roughly divided into three spaces, and includes an electric blower chamber 43, a dust collecting part space 44, and a cord reel chamber 45.

In the electric blower chamber 43, an electric blower 6, an exhaust port 43, an intake duct 48 having a suction port 47 connected to the dust collecting space 44, and an inlet 50 of an exhaust duct 49 communicating with the cord reel chamber 45.
Further, a step portion 51 that engages with the axle pushing lever 19 extending from the side of the suction body 1 is provided outside. Further, a reflection plate 54 having a lamp 52 for illumination and a lamp holder 53 for the illumination is attached to the intake duct 48, and the light is emitted to the outside from a lamp window 55 provided on the wall surface of the electric blower chamber 43.

Further, the main body duct 42 is disposed along the back surface in the dust collecting space 43, the opening 56 of the main body duct 42 is bifurcated, and one opening 56 a is provided with an airtight packing 57. The filter base 58 is attached to the body case 7 by a box-shaped component. The other opening 56b is normally closed by an openable / closable flow path cover 80 having an arcuate packing 79. The opening 56 is tapered 81 so that it can be fitted with the fitting of the attached hose (not shown).
When using the attached hose, the flow passage cover 80 is opened to fit the joint portion to the taper portion 81, and the flow passage from the mouthpiece 1 is closed on the side surface of the joint portion. It is configured. The filter 59 that collects dust is
It is made of a material such as paper or cloth, and is attached to the filter base 58 in a detachable manner by engaging the filter paper portion 60 with the holder 61. The airtightness of the dust collecting portion space 43 to the outside is taken between the dust collecting portion packing 62 provided around the dust collecting portion space 43 and the airtight rib 64 provided on the front lid 63, and when the electric blower 6 is in operation, The dust space 9 is configured to have a negative pressure. The front lid 63 is provided with a dust meter 65 that has a function of flowing a bypass flow from the outside in order to notify when the dust in the filter 59 is discarded and to prevent a temperature rise due to insufficient cooling of the electric blower 6 when the air volume decreases. A clamp 66 is provided on the upper end of the clamp 66 to detachably engage with the main body case 7.

Further, in the cord reel chamber 45, a cord reel 68 around which the power cord 67 is wound, a power switch 69, and a cord reel button.
70 and an outlet 71 of the exhaust duct 49 are provided, and the power transmission line 72 from the cord reel 68 to the electric blower 6 is an exhaust duct.
It is connected through 49. Here, the exhaust duct 49 is
The main body case 7 and the duct lid 73 are closed to form a duct. The cord reel chamber 45 is composed of a main body case 7 and a reel lid 74, and a cord reel 68 is attached to the reel lid 74. If the power cord 67 is broken and needs to be replaced, the cord reel chamber 45 comes into contact. Piece 75 and body case 7
It is structured such that it can be separated from the ring-shaped contact 77 provided on the reel supporting base 76 disposed on the side.
It can be replaced without touching the power transmission line 72 connected to. A handle cap 78 made of a soft material is provided at the tip of the handle 8 attached to the upper end of the cord reel chamber 45 in order to absorb an impact when the vehicle is unexpectedly fallen backward.

Next, use of the upright type vacuum cleaner according to the present embodiment configured as described above will be described.

At the time of use, the power cord 67 is pulled out from the cord reel 68, connected to the power source, and the pedal 12 at the rear of the suction body 1 is stepped on to tilt the body case 7 from above the suction body 1.

Next, when the power switch 69 is turned on, the electric blower 6 is operated, and the rotary brush 4 is rotated via the belt 5 along with suction by the blower.

At this time, when the position of the switching knob 10 is set so that the X position of the height setting cam 14 abuts on the front wheel axle 16, the protrusion amount of the front wheel 18 for height adjustment from the bottom plate 2 is It becomes the minimum (the position shown by the solid line in Fig. 3) and is most suitable for cleaning when the length of the rug is short.

When the length of the carpet is long or medium, the switching knob 10 is turned to the Z or Y position of the height setting cam 14 to adjust the height of the front wheel 18 for height adjustment. Bottom plate 2
Since the amount of protrusion from the rug changes, cleaning can be performed according to the difference in the rug's hair.

Here, a case where the switching knob 10 is turned will be described. That is, when the main body case 7 is leaned against the suction body 1, the rotation of the main body case 7 pushes down one end of the wheel pushing lever 19 protruding from the suction body 1 by the step portion 51 provided in a part of the main body case 7. Due to this use, the positions of both ends 17 of the front wheel axle 16 for height adjustment reach the maximum value of the protrusion amount of the front wheel 18 for height adjustment, or a position slightly more than that, until the end portions 17 of the front wheel axle 16 are reached. Push down. Then, the height setting cam 14 and the both end portions 17 are separated from each other, and no force is applied to rotate the switching knob 10, so that it can be easily rotated to a desired position.

After that, when the main body case 7 is tilted again, the step portion 51 also rotates in the same manner, freeing the axle pushing lever 19,
The height setting cam 14 and both ends 17 of the front wheel axle 16 are brought into contact with each other.

When the cleaning is performed by the above-described method, the air flow containing a large amount of dust passes through the suction duct 41 and the main body duct 42 from the opening 3 of the bottom plate 2 of the suction body 1 and flows into the filter 59. This filter 59 separates and filters into a clean air flow and dust, and only clean air flows from the suction port 47 to the intake duct 4
8 and then passes through the electric blower 6, part of which is the exhaust port 4
At the same time, it is discharged to the outside of the machine from 6, and a part of it also flows into the exhaust duct 49 from the inlet 50 and is introduced into the cord reel chamber 45. This exhaust is the contact piece 7 of the power cord 67 and the cord reel 68.
5 and the contact 77 of the reel support base 76 are cooled and then discharged to the outside of the machine. At this time, the exhaust duct 49 has a relatively long distance, and a muffling effect can be obtained. Further, releasing the exhaust air from the narrow exhaust duct 49 to the cord reel chamber 45 forming a large space is also effective in muffling. Where the belt cover
Reference numeral 40 is made of resin, and the rotary shaft 82 is fitted in the shaft hole 83 of the base frame 13 as shown in FIG. Since the base frame 13 is made of resin and is elastic and the wall of the shaft hole 83 is flexible, the rotation shaft 82 of the belt cover 40 is easily fitted.
It should be noted that a protrusion 84 for fixing the belt cover 40 to the base frame 13 and for positioning is provided at a normal time so as to fit with the positioning hole 85 of the base frame 13. Further, normally, the claw 88 is hooked on the mouthpiece rib 89 of the mouthpiece 1, and the knob 86 is engaged with the rising 87 of the bottom plate 3 to fix the belt cover 40 to the mouthpiece 1 without being applied to the floor. In this case, the belt cover 40 can be fixed to the suction body 1 without using other tightening tools such as screws. Further, when it is necessary to replace the belt 5 once it is cut, the bottom plate 3 is removed, and then the knob 86 is manually lifted. Belt cover
If 40 is raised to 90 ° or more around the rotating shaft 82, the belt 5
Is in good condition to reach the hand. When the belt cover 40 is further rotated until it hits the rear wheel 33, the belt 5 can be replaced without holding the belt cover 40 by hand. Further, even if a large force is applied to the belt cover 40 from the outside, the rear wheel 33 serves as a bearing and can sufficiently withstand.

According to this embodiment, the belt cover 40 is easily attached to the base frame 13 and is normally fixed securely.
Further, when the belt 5 is replaced, the belt cover 40 can be replaced without removing it from the base frame 13 one by one.

〔The invention's effect〕

According to the present invention, (1) since the rotating shaft of the belt cover is integrated, it is easy to attach to the base frame. Furthermore, the number of parts is small.

(2) The belt cover rotating shaft portion does not appear on the outer surface of the suction body, so the appearance is beautiful.

(3) The positioning of the base frame can be performed with the positioning projections of the belt cover and the positioning holes on the side of the base frame.

(4) Since the end portion of the belt cover engages the knob with the rising portion of the bottom plate and the claw engages with the suction rib, the belt cover does not rattle during cleaning.

(5) It is not necessary to hold the belt cover by hand during the belt replacement because it hits the rear wheel when the belt cover rotates about the rotation axis. In addition, the rear wheels can receive a considerable amount of force even with sudden impacts.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a vertical sectional view of an upright type electric vacuum cleaner, Fig. 2 is a side view in which a main body case is inclined in three stages, and Fig. 3 is a part of Fig. 1. A cutaway view, FIG. 4 is a mechanical diagram of the front wheel axle, FIG. 5 is a partial cross-sectional view of the rotating brush,
Fig. 6 is a vertical cross-sectional view of the rotating brush, Fig. 7 is a view of the mouthpiece case seen from the bottom, the bottom plate is removed, and parts of the main body case and the mouthpiece case are partially cut. Fig. 8 is a base frame part assembly. FIG. 9 is a front view of the base frame component set, and FIG. 10 is a perspective view of the upright type electric vacuum cleaner. 1 ... Suction body, 2 ... Bottom plate, 5 ... Belt, 6 ... Electric blower, 13 ... Base frame, 20 ... Driving pulley,
23 …… Rotating brush, 33 …… Rear wheel, 40 …… Belt cover, 43 …… Electric blower room, 44 …… Dust collection space, 59 …… Filter, 82 …… Rotating shaft, 83 …… Shaft hole , 84 …… Projection for positioning, 85 …… Positioning hole, 86 …… Knob, 87…
… Rise, 88 …… Claw, 89 …… Suction body rib, 90 …… Shaft.

Claims (2)

[Claims] 1. An electric blower chamber having a built-in rotary brush for scraping up dust in its front portion, a sucker body having a bottom plate at its bottom portion rotatably engaged therein, and an electric blower for sucking dust therein, and A main body case equipped with a dust collecting part space containing a filter for collecting dust above the electric blower chamber, and a shaft and a rotating brush of the electric blower that have come out of the main body from the hollow rotation shaft of the main body case. An upright electric vacuum cleaner having a belt connecting a drive pulley and a base frame provided with rear wheels behind the suction body, wherein a belt cover for covering the belt is provided on the belt side of the base frame. The cover has a rotation shaft and a knob and a claw at an end thereof, the rotation shaft is inserted into a shaft hole provided in the base slam, and the knob meshes with a rising of the bottom plate, Tight the uprights type electric vacuum cleaner, characterized in that securing the belt cover meshes with the suction body rib. 2. The upright type as claimed in claim 1, wherein the belt cover contacts a rear wheel provided on the base frame when the belt cover rotates about a rotation axis. Vacuum cleaner.