JP3430042B2 - Air sander - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple portable air sander, and more particularly to a state in which dust generated during operation of an air sander can be self-absorbed and the suction force of another suction source is used. To be able to absorb dust, and
The present invention relates to an air sander that can be freely switched to three types that are used as a mere sander.

[0002]

2. Description of the Related Art Conventionally, an air sander which is operated by air from an air source is well known (for example, an actual flat plate 6).
-83250). Explaining this air sander with reference to the drawings, FIG. 9 (a) is a front sectional view of the air sander,
FIG. 10B is a side view of the air sander, and FIG. 10 is an enlarged cross-sectional view of the exhaust nozzle portion.

In the figure, reference numeral 100 is an air sander, and an air inlet 106 and an exhaust passage 124 are formed in a case 108 of the air sander 100, and a mounting hole 12 of an exhaust nozzle 120 is continuous with the exhaust passage 124.
2 is provided. An air hose connected to an air source is connected to the air introduction port 106, and the compressed air introduced through the air introduction port 106 is supplied to the air motor 102 through an opening / closing valve 107 operated by a switch lever 111. To rotate. A disc-shaped pad 103 is attached to the output shaft of the air motor 102 via a power transmission mechanism 105. The output shaft 105a of the power transmission mechanism 105 is the air motor 1
It is provided so as to be eccentric by a certain size with respect to the output shaft of 02. Therefore, the polishing paper 103a attached to the lower surface of the air pad 103 rotates at high speed while moving the center of the polishing paper 103a around the output shaft of the air motor 102 to polish the object to be polished.

The open / close valve 107 is an operating rod 107.
a, the switch lever 111 is pushed down, and the operation rod 107a is moved downward in the figure against the compression coil spring 107b.
The compressed air is supplied to the air motor 102 by connecting the air passages up to 02. When the pushing down of the operating rod 107a is released and the operating rod is moved upward in the drawing by the compression coil spring 107b, the air passage 109 is blocked, the compressed air is not supplied to the air motor 102, and the air motor 102 does not operate.

An exhaust passage 124 and an exhaust pipe 123 are mounted in communication with the mounting hole 122 of the air sander 100. An exhaust nozzle 120 for exhaust is normally attached to the mounting hole 122, and the exhaust nozzle 120 is mounted in a state of being inserted into the mounting hole 122 and fixed by a fixing screw 121. When the fixing screw 121 is removed, the exhaust nozzle 120 can be easily removed, and can be replaced with a dust suction nozzle (not shown) instead.

The air after driving the air motor 102 is exhausted from the exhaust passage 124 and the exhaust pipe 123 to the exhaust nozzle 12.
It is discharged to the outside through 0 and the exhaust nozzle 12
When a dust suction nozzle is attached instead of 0, a negative pressure is generated in the rear portion of the exhaust pipe 123 blown out by the exhaust air from the exhaust passage 124, and this negative pressure causes polishing dust in the air sander body via the pipe 125. Is sucked, and can be collected in the dust bag via the dust suction nozzle.

[0007]

However, in the above air sander, it is necessary to purposely provide the pipe 125 on the outside of the main body in order to suck the polishing dust, resulting in an increase in the number of parts and an increase in weight, resulting in an assembling process. It becomes complicated and causes cost increase. Further, an exhaust pipe 123 having a small flow area is always attached to the exhaust passage 124, and the driving efficiency of the motor is reduced in the non-dust collecting state. Furthermore, there are no measures taken to recover the polishing dust by using a suction source (such as a vacuum cleaner) provided separately from the air sander, which makes it inconvenient for various usage patterns. There is.

Therefore, according to the present invention, a dust suction port is integrally formed in the air sander main body, and a flow path that connects the dust suction port and an exhaust port for exhausting air from the air motor is integrally formed in the main body. Further, a muffler for disconnecting the flow passage can be detachably provided in the exhaust port, and a self-dusting adapter and an adapter for connecting to another suction source can be detachably attached to the dust suction port. In this way, the dust generated during the operation of the air sander can be self-suctioned, the dust can be sucked by using the suction force of another suction source, and the three types can be used as a mere sander. (EN) Provided is an air sander which can be switched to, and aims to solve the above problems.

[0009]

In order to achieve the above object, the technical solution adopted by the present invention is to supply air from an air source from an introduction port and drive an internal air motor to rotate a polishing member to rotate the air motor. Is an air sander in which exhaust air from the exhaust port is exhausted from the exhaust port.The air sander has a dust suction port integrally formed in the air sander main body, and the exhaust port and the suction port are provided in the main body.
A flow passage for self-dusting that communicates with the dust port is integrally formed, and a muffler that disconnects the flow passage can be detachably provided in the exhaust port. It's Thunder. Also, the dust suction port communicates with the dust suction port from the exhaust port.
The air sander is characterized in that an adapter having an ejector function, which is connected to a flow path for self-dust collection in a close contact state, can be detachably attached. Also, connect another suction source to the dust suction port.
Port to collect dust from the exhaust port.
A flow path for self-dusting that communicates with the
Attached to shut off the hose, such as a hose extending from another suction source.
The air sander is characterized in that an adapter used as a connecting member can be detachably attached.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An air sander according to the present invention will be described below with reference to the drawings. FIG. 1 is a plan sectional view of an air sander according to the present embodiment, FIG. 2 is a front sectional view, and FIG. 3 is a side view. Is.

In the figure, reference numeral 1 is a main body of an air sander, and an introduction port 2, an exhaust port 3 and a dust suction port 4 are integrally formed on a side surface of the main body 1 as shown in FIG. Further, in the main body 1, the first end plate 5 and the second end plate 5
End plates 6 are arranged vertically apart from each other in the figure, and a rotor 7 is arranged between these end plates 5, 6.
A rotor shaft 8 holding a rotor 7 is axially supported on both end plates 5, 6:
M is configured. An eccentric cylinder 9 is arranged on the outer circumference of the rotor 7, and a backbone 11 for holding the cylinder 9 in an eccentric state is arranged in a space 10 formed between the main body 1 and the cylinder 9.

Suction holes 12 and 13 for introducing compressed air from the introduction port 2 into the cylinder 9 are formed in the cylinder 9 and the backbone 11, and the air introduced into the cylinder 9 is discharged to the cylinder 9. An exhaust hole 12a is formed to allow the space 10 formed between the cylinder 9 and the main body 1 to communicate with the exhaust port 3, and the air exhausted from the inside of the cylinder 9 can be exhausted from the exhaust port 3 to the outside. You can do it. A polishing member 15 is attached to an end portion of the rotor shaft 8 via a power transmission mechanism 14, and an output shaft 16 of the power transmission mechanism 14 is provided eccentrically with respect to the rotor shaft 8 by a certain size. . Therefore, the polishing member 15 is attached to the rotor shaft 8
It can rotate at high speed while moving around. The polishing member 15 has a structure in which a polishing paper 15b is attached to the lower surface of a disk-shaped pad 15a.

The introduction port 2 is provided with a valve 18 which is opened and closed via a rod (not shown) pushed by the switch lever 17, and when the switch lever 17 is pushed down, the valve 18 opens to open the introduction port 2. The compressed air is supplied to the air motor AM by communicating the air passage from the rotor to the rotor 7 of the air motor AM. When the switch lever 17 is opened, the valve 18 is closed and the air passage is shut off, compressed air is not supplied to the air motor AM, and the air motor AM does not operate. The exhaust port 3 has a flow path 19a communicating with the exhaust port 3 at one end and a silencer member 19 at the other end.
A muffler 19 provided with b is detachably provided.
A dust suction port 4 is formed below the exhaust port 3, and the exhaust port 3 and the dust suction port 4 are communicated with each other by a flow passage 20 formed in the main body 1.
The flow passage 20 is blocked when the muffler 19 described above is attached to the exhaust port 3.

The dust suction port 4 is formed integrally with a chamber 21 formed below the main body 1, and a cap 4a is detachably attached to the dust suction port 4. When the cap 4a is removed, the dust collecting port 4 can be detachably attached with an adapter 22 (hereinafter referred to as a dust collecting ejector) having an ejector shown in FIG. The dust ejector 22 has a nozzle 2 that is connectable to the flow path 20 at the center.
3 and a mixing pipe 24 communicating with the nozzle 23. Dust ejector 22
When the nozzle 23 is connected to the dust collecting port 4, the nozzle 23 is connected to the flow path 20 in a close contact state as shown in the figure, and the outer periphery of the dust collecting ejector 22 is fitted in the dust collecting port 4 in a hermetically sealed state. Negative pressure is generated in the rear portion of the nozzle by the air blown from, and the polishing dust collected in the chamber 21 can be collected from the dust suction port 4 by utilizing this negative pressure. At this time, the exhaust port 3 is closed by the cap 26.

Further, in place of the dust suction ejector 22,
Another adapter 27 (see FIG. 8) for connecting to another suction source can be attached. The adapter 27 has a shape obtained by removing the mixing pipe 24 from the dust suction ejector 22, and is used as a connecting member with another suction source.

The operation of the air sander having the above structure will be described. [In non-dust collecting state] In the non-dust collecting state, a muffler 19 is attached to the exhaust port 3 as shown in FIGS. 1 to 3.
A cap 4a is attached to the dust suction port 4, and the chamber 21 formed below the air sander body 1 serves as a cover for covering the power transmission mechanism 14.

When the switch lever 17 is pushed down in this state, the valve 18 is opened via the rod, the air passage from the introduction port 2 to the air motor AM is communicated, and compressed air is supplied from the suction holes 12 and 13 to the air motor AM. .
When the air motor AM rotates, the disc-shaped pad 15a also rotates at high speed via the power transmission mechanism 14 while moving the center of the pad 15a around the output shaft of the air motor AM, and the polishing paper 15b attached to the lower surface of the pad 15a covers the pad 15a. Polish the abrasive. Exhaust air from the air motor AM passes through an exhaust hole 12a formed in the cylinder 9, and further the cylinder 9
The muffler 19 attached to the exhaust port 3 through the space 10 between the main body 1 and the main body 1, and passes through the muffler 19 and the sound deadening member 19b.
Is discharged to the outside. In this state, the flow passage 20 that communicates the exhaust port 3 with the dust suction port 4 is blocked by the muffler 19, and the exhaust air does not flow into the chamber 21 below the main body 1 through the flow passage 20. Absent.

[During self-dusting state] In the self-dusting state, the muffler 19 is removed from the exhaust port 3 and the cap 2
6 is attached and the exhaust port 3 is closed. In this state, the exhaust port 3 and the dust suction port 4 are connected by the flow path 20. In addition, the dust collecting port 4 is connected to the dust collecting ejector 2
2 is attached. Set the dust ejector 22 to the dust suction port 4
, The nozzle 23 integrally formed with the dust suction ejector 22 is connected to the flow path 20 in a close contact state, and the outer periphery of the dust suction ejector 22 is attached to the dust suction port 4 as shown in FIG.
A negative pressure can be generated in the rear part of the nozzle by fitting the inside in a sealed state and the air blown out from the nozzle 23.

When the switch lever 17 is pushed down in this state, the valve 18 is opened via the rod, the air passage from the introduction port 2 to the air motor AM is communicated, and compressed air is supplied from the suction holes 12 and 13 to the air motor AM. .
When the air motor AM rotates, the disk-shaped pad 15a also rotates at high speed while moving the center of the pad 15a around the output shaft of the air motor AM via the power transmission mechanism 14, and the polishing paper 15b attached to the lower surface of the pad 15a covers the pad 15a. Polish the abrasive. Exhaust air from the air motor AM passes through an exhaust hole 12a formed in the cylinder 9 and further, the cylinder 9
The gas reaches the exhaust port 3 via the space 10 between the main body 1 and the main body 1, and further flows into the nozzle 23 of the dust ejector 22 via the flow path 20. The air that has entered the nozzle 23 is blown out at the portion of the mixing pipe 24 to generate a negative pressure. Due to the negative pressure at this time, the polishing dust is sucked into the dust ejector 22 together with the air through the chamber 21 in the lower portion of the main body 1,
Collected by appropriate means.

[When connecting to another suction source to suck dust] When sucking dust from another suction source, a muffler 19 is attached to the exhaust port 3 and a mixing pipe 24 is attached to the dust suction port 4. The removed adapter 27 is attached. The adapter 27 is provided with a nozzle 28,
Since the flow path 20 is blocked by the muffler 19,
Air is not blown out from this nozzle 28. In this case, the adapter 27 is used as a connecting member with a hose extending from the suction source.

When the switch lever 17 is pushed down in this state, the valve 18 is opened via the rod, the air passage from the introduction port 2 to the air motor AM is communicated, and compressed air is supplied to the air motor AM from the suction holes 12 and 13. .
When the air motor AM rotates, the disk-shaped pad 15a also rotates at high speed while moving the center of the pad 15a around the output shaft of the air motor AM via the power transmission mechanism 14, and the polishing paper 15b attached to the lower surface of the pad 15a covers the pad 15a. Polish the abrasive. Exhaust air from the air motor AM passes through an exhaust hole 12a formed in the cylinder 9 and further, the cylinder 9
Then, it is discharged to the outside from the muffler 19 attached to the exhaust port 3 via the space 10 between the main body 1 and the main body 1. In this polishing state, when suction is performed by another suction source via the adapter 27 attached to the dust suction port 4, the chamber 21 below the main body 1
The polishing dust is sucked together with the air by the suction source through and is collected by an appropriate means such as a bag.

As described above, the present invention is of three types: one air sander is capable of self-dusting, one is capable of absorbing dust by utilizing the suction force of another suction source, and the other is simply used as a sander. Can be switched freely, which greatly improves usability. Although the muffler opens and closes the flow path that connects the exhaust port and the dust suction port in the above embodiment, a manual valve or the like can also be used. Further, the present invention can be implemented in various other forms without departing from the spirit or main characteristics thereof, and the above-described embodiments are merely exemplifications in all respects and should be construed in a limited manner. Don't

[0023]

As described in detail above, according to the present invention,
A dust suction port is integrally formed in the air sander body, and a flow path that connects the dust suction port and an exhaust port for exhausting air from the air motor is integrally formed in the same body. Since a muffler for disconnecting the flow passage is detachably provided, an adapter for self-dust suction, and an adapter for connecting to another suction source can be detachably attached to the dust suction port.
The dust generated during the operation of the air sander can be freely switched between three types: a state in which it can absorb dust by itself, a state in which it can absorb dust by using the suction force of another suction source, and a non-dusting state in which it is simply used as a sander. It is possible to obtain excellent effects such as being possible.

[Brief description of drawings]

FIG. 1 is a plan sectional view (a sectional view taken along line BB in FIG. 2) of an air sander in a non-dust collecting state according to the present embodiment.

FIG. 2 is a front cross-sectional view (cross-sectional view taken along the line AA in FIG. 1) of the air sander in a non-dust collecting state according to the present embodiment.

FIG. 3 is a side view of the air sander according to the present embodiment.

FIG. 4 is a cross-sectional view of the dust ejector 22 attached to the air sander of the present embodiment.

FIG. 5 is a plan sectional view (sectional view taken along line D-D in FIG. 6) of an air sander in a self-dusting state according to the present embodiment.

FIG. 6 is a front cross-sectional view (C-C cross-sectional view in FIG. 5) of the air sander in the self-dusting state according to the present embodiment.

FIG. 7 is a plan cross-sectional view (cross-sectional view taken along line FF in FIG. 8) of the air sander in a dust suction state by another suction source according to the present embodiment.

8 is a front cross-sectional view (cross-sectional view taken along line EE in FIG. 7) of the air sander in a dust suction state by another suction source according to the present embodiment.

FIG. 9A is a front sectional view of a conventional air sander,
(B) is the same side view.

FIG. 10 is an enlarged cross-sectional view of an essential part of the self-dusting state of FIG.

[Explanation of symbols]

1 Air sander body 2 Introduction port 3 exhaust port 4 Dust collection port 5, 6 End plate 7 rotor 8 rotor shaft 9 cylinders 10 spaces 11 backbone 12, 13 suction hole 12a discharge hole 14 Power transmission mechanism 15 Polishing member 15a pad 15b Polishing paper 16 Output shaft 17 Switch lever 18 valves 20 flow paths 21 rooms 22 Adapter (Ejector for dust collection) 23 nozzles 24 mixing pipes

Claims (3)

(57) [Claims] 1. An air port is supplied with air from an air source to drive an internal air motor to rotate a polishing member,
An air sander in which exhaust air from an air motor is exhausted from an exhaust port, wherein the air sander is integrally formed with a dust suction port in an air sander main body, and the exhaust port and the dust suction port are provided inside the main body. And
An air sander characterized in that a communicating flow path for self-dusting is integrally formed, and a muffler for blocking communication of the flow path can be detachably provided in the exhaust port. 2. The exhaust port is attached to the dust suction port.
Adheres to the flow path for self-dust collection that communicates with the dust collection port
The air sander according to claim 1, wherein an adapter having an ejector function, which is connected in a state, can be detachably attached. 3. The suction port is connected to another suction source.
In order to collect dust from the exhaust port.
Muffles the flow path for self-dusting that communicates with the exhaust port to the exhaust port.
Hose that is attached to a line to shut off and extends from another suction source
The air sander according to claim 1, wherein an adapter used as a connecting member of the air sander can be detachably attached.