JP2002144210A - Sander - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost by reducing the number of parts. SOLUTION: In a rubber foot 12 provided between a main body housing 2 and a base 8, a flange part 14 and a flange part 15 are fixed to a lower surface of the main body housing 2 and an upper surface of a base 8, respectively, in a state of a fan 5 stored in a cylinder body 13. In the fixed states, the inside of the cylinder body 13 is partitioned into upper and lower sides by approaching of an outer peripheral edge of the fan 5 to an inner peripheral surface of the cylinder body 13 and a dust collecting chamber 18 is formed on a lower side of the fan 5. A connecting cylinder 19 is extended in the cylinder body 13 and an opening of the connecting cylinder 19 is communicated with a discharge nozzle 20 of the main body housing 2 in a mounting state on the main body housing 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sander having an eccentric base below a main housing.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view of a conventional orbital sander 30.
Output shaft 33 protrudes below the main body housing 31,
A fan 34 having a motor cooling fan 35 formed on the upper surface and a dust collecting fan 36 formed on the lower surface is fixed to the output shaft 33. At the lower end of the fan 34, a shaft portion 34a eccentric to the output shaft 33 is formed.
Are connected at an eccentric position via a ball bearing 38,
The rotation of the output shaft 33 accompanying the driving of the motor 32
The polished material can be polished with a sanding paper or the like stretched on the lower surface of the polished material 7 by eccentric movement. Furthermore,
The body housing 31 and the base 37 are connected by synthetic resin feet 39, 39 to prevent the base 37 from rotating.

On the other hand, a fan guide 40 for accommodating a fan 34 is provided between the main body housing 31 and the base 37, and a dust collection chamber 41 communicating with the lower surface of the base 37 is provided below the dust collection fan 36. Formed, fan guide 4
The connecting cylinder 42 protruding from the side of the main housing 3
1 and communicates with a discharge nozzle 43 protruding therefrom. Therefore, by the rotation of the fan 34 accompanying the rotation of the output shaft 33,
Dust is sucked into the dust collection chamber 41 from the lower surface of the base 37,
The dust is discharged to the outside of the main body housing 31 via the connection cylinder 42 and the discharge nozzle 43, and can be collected in a dust bag 44 connected to the discharge nozzle 43.

[0004]

The above-mentioned orbital sander 3
In the case of No. 0, since the detent feet 39, 39 and the dust collecting fan guide 40 are composed of different parts, respectively, the number of parts is increased, and the assembling time is also increased, which leads to an increase in cost. Would.

[0005] Therefore, an object of the present invention is to provide a sander in which a foot and a fan guide are formed with a reasonable configuration and cost can be reduced.

[0006]

According to a first aspect of the present invention, a fan guide is formed of an elastic body, an upper portion of the fan guide is formed on a main body housing, and a lower portion is formed on a base. It is characterized in that the base itself is prevented from rotating by a fan guide in connection with the above.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory cross-sectional view of the orbital sander 1. A motor 3 is accommodated in a vertical direction at the center of a main body housing 2 assembled with a pair of right and left split dies, and an output shaft 4 is projected downward from the main body housing 2. At the end of the output shaft 4, a fan 6 for cooling the motor is provided on the upper surface.
Disc-shaped fans 5 each having dust collecting fans 7 formed on the lower surface
Are fixed orthogonally. Also, below the fan 5,
A shaft portion 5a eccentric with the output shaft 4 is formed.
a is rotatably connected to a ball bearing 10 in a bearing box 9 formed at the center of the base 8. Reference numeral 11 denotes a pad fixed to the lower surface of the base 8.

[0008] A rubber foot 12 as a fan guide is provided between the main body housing 2 and the base 8. As shown in FIG. 2, the rubber foot 12 has flange portions 14 and 1 above and below a central cylindrical body 13, respectively.
In the state where the fan 5 is accommodated in the cylindrical body 13, the upper flange portion 14 is screwed on the lower surface of the main body housing 2 by screws 16, and the lower flange portion 15 is a screw (not shown). And a pair of clips 17, 17 respectively fixed to the upper surface of the base 8. In this fixed state, the outer peripheral edge of the fan 5 is close to the inner peripheral surface of the cylindrical body 13, and the inside of the cylindrical body 13 is vertically partitioned, and a dust collection chamber 18 is formed below the fan 5. Further, a rectangular cylindrical connecting tube 19 communicating with the dust collecting chamber 18 is extended from the cylindrical body 13, and an opening of the connecting tube 19 projects to the side of the main body housing 2 in a state of being attached to the main body housing 2. It can communicate with the installed discharge nozzle 20. On the other hand, the base 8 and the pad 11 have a plurality of intake ports 2 for communicating the lower surface of the pad 11 with the dust collection chamber 18.
Are formed in the cylindrical body 13 of the rubber foot 12, and a plurality of exhaust ports 22 are opened in the outer periphery of the motor cooling fan 6.

In the orbital sander 1 configured as described above, when the switch 23 provided on the upper part of the main body housing 2 is turned on to drive the motor 3, the output shaft 4 rotates. Here, the shaft center of the output shaft 4 and the shaft portion 5 of the fan 5
Since the output shaft 4 is eccentric, the shaft portion 5a moves eccentrically with the rotation of the output shaft 4, and the base 8 connected to the shaft portion 5a moves eccentrically with this eccentric motion. Since the base 8 is connected to the main body housing 2 by the rubber foot 12, the elasticity of the base 8 prevents the base 8 itself from rotating and performs only eccentric movement, and the material to be polished by sanding paper stretched on the lower surface of the pad 11. Can be polished.

On the other hand, when the fan 5 rotates with the rotation of the output shaft 4, dust is collected from the intake ports 21, 21... Of the base 8 and the pad 11 by the rotation of the dust collecting fan 7 in the rubber foot 12. It is sucked into the dust chamber 18, and
9 through the discharge nozzle 20 to the outside of the main body housing 2. Therefore, the dust bag 2 is attached to the discharge nozzle 20.
By connecting 4 and the like, dust can be collected. In addition, since the cooling air is sucked from an intake port (not shown) above the main body housing 2 by the rotation of the motor cooling fan 6 and discharged to the outside through the air holes 22, 22,... 3 is cooled.

As described above, according to the above embodiment, the rubber foot 12 as a fan guide is formed of an elastic body, and the upper portion of the rubber foot 12 is connected to the main body housing 2 and the lower portion thereof is connected to the base 8, respectively. 12, the base 8 itself can be prevented from rotating, so that only the rubber foot 12 can be provided with a dust collecting function and a function to prevent the base 8 from rotating, the configuration is rationalized, and the number of parts is reduced.
The labor of assembling is also simplified. Therefore, cost reduction can be expected.

Incidentally, the specific structure of the fan guide is not limited to the rubber foot 12, but if it is an elastic body having a function of preventing rotation of the base together with the function of collecting dust, the mounting structure to the main body housing and the base is not limited. It can be changed as appropriate.

[0013]

According to the first aspect of the present invention, the fan guide is formed of an elastic body, the upper portion of the fan guide is connected to the main body housing, and the lower portion is connected to the base. By making the rotation stop possible, the dust collection function and the base rotation prevention function can be provided only by the fan guide, the configuration is rationalized, the number of parts is reduced, and the assembling labor is simplified. Therefore, cost reduction can be expected.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of an orbital sander.

FIG. 2A is a plan view of a rubber foot. (B) It is a side view of a rubber foot. (C) It is a bottom view of a rubber foot.

FIG. 3 is an explanatory sectional view of a conventional orbital sander.

[Explanation of symbols]

1. Obital sander 2. Body housing 3.
Motor, 4 output shaft, 5 fan, 6 motor cooling fan, 7 dust collection fan, 8 base, 12
..Rubber foot, 13.Cylinder, 18.Dust collection chamber, 1
9. Connection tube.

Claims (1)

[Claims] 1. A dust collecting fan is fixed to an output shaft of a motor protruding below a main body housing, and a base is eccentrically connected to the output shaft so as to be rotatable. A sand guide provided with a fan guide for accommodating therein, a dust collecting chamber formed in the fan guide, and the dust collecting chamber communicating with the lower surface of the base and the outside of the main body housing; A sander formed of a body, wherein an upper part of the fan guide is connected to the main body housing and a lower part thereof is connected to the base, whereby the base itself can be prevented from rotating by the fan guide.