KR100348810B1 - Air sander - Google Patents

Abstract

The present invention can freely switch between three types of dusts generated during the operation of the air sander, a state in which dust can be sucked by using a suction force of another suction source, and a state in which it is used as a simple sander. In providing an air sander,

The air from the air source is supplied from the inlet port 2, the built-in air motor AM is driven to rotate the polishing member 15, and the exhaust air from the air motor is exhausted from the exhaust port 3. An air sander, wherein the air sander integrally forms a suction port (4) in the air sander body and at the same time integrates a flow path (20) in communication with the suction port (4) and the exhaust port (3). And a muffler 19 for detachably communicating with the flow passage in the exhaust port.

Description

Air Sander {AIR SANDER}

The present invention relates to a portable and simple air sander, in particular, a state in which dust generated during air sander operation can be self-extracted, a state in which dust can be absorbed by using a suction force of another suction source, and also used as a simple sander. It is related with the air sander which can be freely switched to three types of conditions.

Background Art Conventionally, air sanders operating by air from an air source are well known (for example, Japanese Patent Application Laid-Open No. 94-83250).

9A is a front sectional view of the air sander, the same figure b is a side view of the air sander, and FIG. 10 is an enlarged sectional view of the exhaust nozzle part.

In the drawing, reference numeral 100 denotes an air sander, and the air inlet 106 and the exhaust passage 124 are formed in the case 108 of the air sander 100, and the exhaust nozzle 120 is continuously connected to the exhaust passage 124. Mounting holes 122 are provided.

An air hose connected to an air source is connected to the air inlet 106, and the compressed air introduced through the air inlet 106 passes through an opening / closing valve 107 operated by the switch lever 111. Supplied to 102 to rotate the air motor 102. The disc 103 is attached to the output shaft of this air motor 102 via the power transmission mechanism 105. The output shaft 105a of this power transmission mechanism 105 is provided eccentrically with respect to the output shaft of the air motor 102 by a predetermined dimension. For this reason, the polishing paper 103a attached to the lower surface of the air pad 103 is rotated at high speed while the center thereof is moved around the output shaft of the air motor 102 to polish the polishing object.

The on-off valve 107 is provided with an operation rod 107a, by pressing down the switch lever 111 to move the operation rod 107a against the compression coil spring 107b to move downward in the drawing. An air passage from 106 to the air motor 102 communicates with the compressed air to the air motor 102. In addition, if the operation rod 107a is pushed down and the operation rod is moved upward in the drawing by the compression coil spring 107b, the air passage 109 is blocked, and the compressed air is not supplied to the air motor 102, so that the air Motor 102 does not work.

The exhaust passage 124 and the exhaust pipe 123 communicate with and are attached to the mounting hole 122 of the air sander 100. The exhaust nozzle 120 for exhaust is attached to the mounting hole 122 at all times, and the exhaust nozzle 120 is inserted into the mounting hole 122 to be fixed by the fixing screw 121. It is. When the fixing screw 121 is removed, the exhaust nozzle 120 can be simply removed and replaced with a suction nozzle (not shown).

When the air after driving the air motor 102 is discharged from the exhaust passage 124 and the exhaust pipe 123 to the outside via the exhaust nozzle 120, and a suction nozzle is attached instead of the exhaust nozzle 120, A negative pressure is generated after the exhaust pipe 123 is blown out by the exhaust air from the exhaust passage 124, and the negative pressure causes the abrasive dust in the air sander body to be sucked through the pipe 125, and passes through the suction nozzle into the suction bag. It can be recovered.

However, in the above air sander, it is necessary to install the pipe 125 on the outside of the main body in order to suck in the abrasive dust, which leads to an increase in the number of parts and an increase in weight, which complicates the assembly process and causes a cost increase. Moreover, the exhaust pipe 124 is always attached to the exhaust pipe 123 having a small flow area, so that the driving efficiency of the motor decreases in the non-dusting state. In addition, there is a problem in that it is not good to use the suction sand (for example, a cleaner, etc.) installed separately from the air sander to recover the abrasive dust is bad to use according to various conditions of use.

Therefore, the present invention integrally forms a suction port in the air sander body and at the same time forms a flow path communicating with the suction port and an exhaust port for exhausting air from the air motor in the fuselage body. It is possible to attach and detach the muffler which blocks the flow path freely and detachably attach the adapter for the magnetic suction and the adapter for connecting to other suction source to the suction port. It is an object of the present invention to provide an air sander capable of freely switching between three types of air conditioners, a state that can be sucked using the suction force of another suction source, and a state of use as a simple sander. .

Technical solution employed by the present invention for achieving the above object,

An air sander that supplies air from an air source from the inlet port, drives the built-in air motor to rotate the polishing member, and exhausts exhaust air from the air motor from the exhaust port, and the air sander is connected to the air sander body. In addition, the exhaust port is integrally formed, and a flow path communicating with the exhaust port and the exhaust port is integrally formed in the main body, and a muffler for communicating and blocking the flow path can be freely installed in the exhaust port. It's an air sander.

BRIEF DESCRIPTION OF THE DRAWINGS The cross-sectional plan view (B-B cross section figure in FIG. 2) of the air sander of a non-dusting state in this embodiment.

2 is a front cross-sectional view (A-A cross-sectional view in FIG. 1) of the air sander in the non-exhausted state as the present embodiment.

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

4 is a cross-sectional view of the ejecting ejector 22 mounted on the air sander of the present embodiment.

Fig. 5 is a plan sectional view (D-D sectional view in Fig. 6) of the air sander in the self-excited 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-exhausted state of the present embodiment.

Fig. 7 is a plan sectional view (F-F cross sectional view in Fig. 8) of the air sander in the exhausted state by another suction source as the present embodiment.

Fig. 8 is a front sectional view (E-E cross sectional view in Fig. 7) of the air sander in the dust-absorbed state by another suction source as the present embodiment.

Figure 9a is a front cross-sectional view of a conventional air sander, Figure 9b is the same side view.

FIG. 10 is an enlarged cross-sectional view illustrating main parts of the self-exhausted state of FIG. 9. FIG.

※ Explanation of code for main part of drawing

1: air sander body 2: inlet port

3: exhaust port 4: suction port

5, 6: end plate 7: rotor

8: rotor shaft 9: cylinder

10: space 11: backbone

12, 13: suction hole 12a: discharge hole

14: power transmission mechanism 15: abrasive member

15a: pad 15b: abrasive paper

16: output shaft 17: switch lever

18: valve 20: flow path

21: seal 22: adapter (suction ejector)

23: nozzle 24: mixing pipe

Referring to the drawings, an air sander according to the present invention will be described. FIG. 1 is a plan sectional view of the air sander according to the present embodiment, FIG.

In the drawing, 1 is the main body of the air sander, and the introduction port 2, the exhaust port 3, and the suction port 4 are integrally formed on the side surface of the main body 1 as shown in FIG.

Moreover, in the main body 1, the 1st light plate 5 and the 2nd light plate 6 are spaced apart up and down in the figure, and the rotor 7 is arrange | positioned between these light plates 5 and 6, and a rotor The rotor shaft 8 supporting (7) is axially supported by the two swash plates 5 and 6, thereby forming an air motor. An eccentric ring 9 is disposed on an outer circumference of the rotor 7, and a book bone 11 for supporting the cylinder 9 in an eccentric state in a space 10 formed between the main body 1 and the cylinder 9. This is arranged.

The cylinder 9 and the bookbone 11 are provided with suction holes 12, 13 for introducing compressed air from the inlet port 2 into the cylinder 9, and the cylinder 9 has a cylinder 9 inside. A discharge hole 12a for discharging the introduced air is formed, and the space 10 formed between the cylinder 9 and the main body 1 communicates with the exhaust port 3 and discharges from the inside of the cylinder 9. The compressed air can be discharged from the exhaust port 3 to the outside.

An end portion of the rotor shaft 8 is attached with a polishing member 15 through a power transmission mechanism 14, and the output shaft 16 of the power transmission mechanism 14 is eccentric with respect to the rotor shaft 8 by a predetermined dimension. It is installed. For this reason, it is possible to rotate at high speed while moving the polishing member 15 around the rotor shaft 8. The polishing member 15 has a structure in which the polishing paper 15b is attached to the lower surface of the disk-shaped pad 15a.

The inlet port 2 is provided with a valve 18 that opens and closes through a rod (not shown) pressed by the switch lever 17. When the switch lever 17 is pressed down, the valve 18 opens and the inlet port is opened. The air passage from (2) to the rotor 7 of the air motor communicates with the compressed air to the air motor. In addition, when the switch lever 17 is opened, the valve 18 is closed to block the air passage, and the compressed air is not supplied to the air motor, so the air motor does not operate.

In the exhaust port 3, a flow path 19a communicating with the exhaust port 3 at one end and a muffler 19 having a noise member 19b at the other end thereof are detachably installed. A suction port 4 is formed below the exhaust port 3, and the exhaust port 3 and the suction port 4 communicate with each other by a flow path 20 formed in the main body 1. The flow path 20 is such that the flow path 20 is blocked when the muffler 19 is attached to the exhaust port 3.

The suction port 4 is integrally formed with the seal 21 formed below the main body 1, and the suction port 4 is detachably attached to the cap 4a.

When the cap 4a is removed, the suction port 4 can be detachably attached to the adapter 22 having the ejector shown in Fig. 4 (hereinafter, referred to as the ejection ejector). The exhaust ejector 22 has a nozzle 23 which can be connected to the flow path 20 at the center thereof, and is provided with a mixing pipe 24 in communication with the nozzle 23. When the exhaust ejector 22 is connected to the exhaust port 4, as shown in the drawing, the nozzle 23 is connected to the oil passage 20 in close contact, and the outer periphery of the exhaust ejector 22 is the exhaust port. (4) Negative pressure is generated at the rear of the nozzle by air ejected from the nozzle 23 by fitting in a sealed state, and the abrasive dust collected in the chamber 21 is recovered from the suction port 4 using this negative pressure. I can do it. At this time, the exhaust port 3 is closed by the cap 26.

In addition, a separate adapter 27 (see Fig. 8) for connecting to another suction source can be attached in place of the ejector 22 for suction. The adapter 27 has a shape excluding the mixing pipe 24 from the suction ejector 22, and is used as a connection member with another suction source.

The operation of the air sander having the above configuration will be described.

(Non-dusting state)

In the non-dusting state, as shown in Figs. 1 to 3, a muffler 19 is attached to the exhaust port 3, and a cap 4a is attached to the exhaust port 4, and the air sander body 1 The seal 21 formed at the bottom of the cover serves as a cover for covering the power transmission mechanism 14.

In this state, when the switch lever 17 is pushed down, the valve 18 opens through the rod, and an air passage from the inlet port 2 to the air motor communicates with the compressed air supplied from the suction holes 12 and 13 to the air motor. do. When the air motor rotates, the disk 15a on the disk also rotates at high speed while moving its center around the output shaft of the air motor through the power transmission mechanism 14, and the polishing paper 15b attached to the bottom surface of the pad 15a. The polished object is polished by. Exhaust air from the air motor passes through the discharge hole 12a formed in the cylinder 9 and is installed in the exhaust port 3 via the space 10 of the cylinder 9 and the main body 1 ( Passed through the flow path (19a) of 19, and is discharged to the outside through the noise member (19b).

In this state, the flow path 20 communicating with the exhaust port 3 and the suction port 4 is blocked by the muffler 19, and the exhaust air is sealed under the main body 1 through the flow path 20. We do not flow in (21).

(In magnetic suction state)

In the self-exhaust state, the muffler 19 is removed from the exhaust port 3 and the cap 26 is attached to close the exhaust port 3. In this state, the exhaust port 3 and the suction port 4 are connected by the flow path 20. In addition, a suction ejector 22 is attached to the suction port 4. When the exhaust ejector 22 is mounted on the exhaust port 4, the nozzle 23 integrally formed with the exhaust ejector 22 is connected to the flow path 20 in close contact with the exhaust ejector 22 as shown in the drawing. The outer circumference of the ejector 22 can be fitted in the sealed port 4 in a sealed state to generate negative pressure at the rear of the nozzle by the air blown out from the nozzle 23.

In this state, when the switch lever 17 is pushed down, the valve 18 opens through the rod, and an air passage from the inlet port 2 to the air motor communicates with the compressed air supplied from the suction holes 12 and 13 to the air motor. do. When the air motor rotates, the disk 15a on the disk also rotates at high speed while moving its center around the output shaft of the air motor through the power transmission mechanism 14, and the polishing paper 15b attached to the bottom surface of the pad 15a. The polished object is polished by. The exhaust air from the air motor passes through the discharge hole 12a formed in the cylinder 9 and reaches the exhaust port 3 via the space 9 of the cylinder 9 and the main body 1, and further includes a flow path ( 20 flows into the nozzle 23 of the ejecting ejector 22. Air entering the nozzle 23 is ejected from a portion of the mixing pipe 24 to generate negative pressure. At this time, the abrasive dust is sucked together with the air to the dust ejecting ejector 22 through the seal 21 under the main body 1 by the negative pressure, and then recovered by appropriate means.

[When dust is connected to another suction source]

When the suction is performed by another suction source, a muffler 19 is attached to the exhaust port 3, and an adapter 27 which is fitted with a mixing pipe 24 is attached to the exhaust port 4. Although this adapter 27 is equipped with the nozzle 28, since the flow path 20 is interrupted | blocked by the muffler 19, air does not blow out from this nozzle 28. FIG. The adapter 27 in this case is used as a connecting member with a hose or the like extending from the suction source.

In this state, when the switch lever 17 is pushed down, the valve 18 opens through the rod, and an air passage from the inlet port 2 to the air motor communicates with the compressed air supplied from the suction holes 12 and 13 to the air motor. do. When the air motor rotates, the disk 15a on the disk also rotates at high speed while moving its center around the output shaft of the air motor through the power transmission mechanism 14, and the polishing paper 15b attached to the bottom surface of the pad 15a. The polished object is polished by. Exhaust air from the air motor passes through the discharge hole 12a formed in the cylinder 9 and is installed in the exhaust port 3 via the space 10 of the cylinder 9 and the main body 1 ( 19) to the outside.

In this polishing state, the suction dust is sucked by the suction source together with the air through the seal 21 in the lower part of the main body 1 by suction through the adapter 27 mounted on the suction port 4 by another suction source. And recovered by suitable means such as bags.

As described above, the present invention can freely switch between three types, a state in which one air sander can be self-extracted, a state in which it can be sucked using the suction force of another suction source, and a state used as a simple sander. There is very convenience.

Moreover, in the said embodiment, although the flow path which connected the exhaust port and the suction port was performed by the muffler, a manual valve etc. can also be used. In addition, this invention can be implemented in other various forms, without deviating from the mind or main characteristics, and the said Example is only a mere illustration in all the points, and should not interpret it limitedly.

As described in detail above, according to the present invention, an exhaust port is integrally formed in the air sander body, and a flow path communicating with the exhaust port and the exhaust port for exhausting air from the air motor is integrally formed in the body. In addition, since a muffler for detachably communicating with the flow path is detachably installed in the exhaust port, an air-sander operation can be detachably attached to the suction port, and an adapter for magnetic suction and an adapter connected to another suction source can be detachably attached. Excellent effects such as the possibility of self-dusting dust generated in the air, the state of being able to suck up using the suction force of another suction source, and freely switching between three types of non-dusting states to be used as simple sanders. Can be represented.

Claims (3)

An air sander which supplies air from the air source from the inlet port 2, drives the built-in air motor to rotate the polishing member 15, and exhausts the exhaust air from the air motor from the exhaust port 3; The air sander integrally forms a suction port (4) in the air sander body (1) and at the same time integrally forms a flow path in communication with the suction port (4) and the exhaust port (3). When the flow path 20 attaches a detachable muffler 19 to the exhaust port 3, the exhaust air from the air motor flows out from the exhaust port 3 side to the exhaust port 4 side. An air sander, characterized in that formed in the position to block. The method of claim 1, The suction port 4 can be detachably attached to the adapter 22 having an ejector function, and the adapter 22 is provided with a nozzle 23 that can be connected to the flow path 20. Air Sander. The method of claim 1, The suction port 4 can be detachably attached to the adapter 27 that can be connected to another suction source, and the muffler 19 can be detachably attached to the exhaust port 3. Air sander.