JP2000218534A - Grinding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change the position of the tip of a grinding member easily in a short time and collect the dust generated at the sanding work time without hindering the sanding work. SOLUTION: In this grinding device, a drive body 15 is connected to the output shaft 2 of a motor provided on a grinder body 1 through an eccentric mechanism provided on the head 1a of the body 1 and a grinding member 30 is provided on the bottom of the drive body 15 through a pad 29. A cylindrical elastic member 13 engaged with an opening end is provided rotatably between the opening end of the head 1a and drive body 15 and the drive body 15 is fitted to the elastic member 13 and the drive body 15 is positioned to a desired position by the turning of the elastic member 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing apparatus used for processing a workpiece such as wood or iron plate.

[0002]

2. Description of the Related Art In a conventional polishing apparatus of this type, a driving body is connected to an output shaft of a motor provided in a main body of the polishing apparatus via an eccentric mechanism, and a polishing member is attached to the driving body by a screw. And during sanding work,
Since the tip of the polishing member located in the axial direction of the output shaft is used intensively, in order to prevent wear of the tip, loosen the screw and remove the driving body from the polishing apparatus body,
The position of the tip is changed to tighten the screw, and the other tip is positioned in the axial direction of the output shaft. In another conventional polishing apparatus, one end of a dust collection duct is connected to a driving body in order to collect dust generated during a sanding operation. The dust collection duct is located below and away from the main body of the polishing apparatus, and is fixed at this position.

[0003]

However, in the case of the above-mentioned conventional polishing apparatus, since the detachment of the driver from the main body of the polishing apparatus is performed by screws, the operation of attaching and detaching the screws is complicated, and the leading end of the polishing member is difficult. There is a problem that it takes time to change the position of the. In the case of another conventional polishing apparatus, the dust collection duct is located below the main body of the polishing apparatus, so that during sanding work, an operator's hand hits the dust collection duct and hinders the dust collection duct. In addition, since the dust collection duct is fixed at a position below the polishing apparatus main body, the position of the dust collection duct cannot be changed, and there is a problem that the efficiency of the sanding operation is reduced.

In view of the above problems, the present invention can easily and quickly change the position of the tip of the polishing member.
An object of the present invention is to provide a polishing apparatus that can collect dust generated during sanding work without hindering the sanding work.

[0005]

According to a first aspect of the present invention, there is provided a polishing apparatus comprising: a polishing apparatus; A driving body is connected via an eccentric mechanism, and a polishing apparatus is provided with a polishing member provided on a bottom surface of the driving body via a pad. In the polishing apparatus, an opening end of the head portion and the driving body are provided. A cylindrical elastic member engaged with the opening end is rotatably provided, a driving body is fitted to the elastic member, and the driving body is positioned at a desired position by the rotation of the elastic member. It is.

Therefore, since the elastic member is rotatably provided between the opening end of the head portion and the driving member, when the elastic member is rotated, the driving member fitted to the elastic member rotates. . Since the elastic member is engaged with the opening end, the driver can be moved to a desired position. For example, by positioning the side of the driving body at a position orthogonal to the axial direction of the output shaft of the motor, the inner surface of the corner of the box can be sanded.

According to a second aspect of the present invention, in the polishing apparatus, the driving body is pressed against the elastic member by a biasing means, and furthermore, the driving body is removably fitted to a column integrally formed with the elastic member. The tip of the driving body used at the time of sanding work is positioned in the axial direction of the output shaft of the motor by being fitted to the support.

Accordingly, the driving body pressed against the elastic member by the urging means against the support of the elastic member is separated from the support of the elastic member against the urging direction of the urging means, and the driving body is separated from the elastic member. The driving body is rotated in the detached state. Then, by the release of the accumulating force of the urging means, the driving body is fitted to the support of the elastic member, and the tip of the driving body used at the time of the sanding operation is positioned in the axial direction of the output shaft of the motor.

Further, in the polishing apparatus according to a third aspect of the present invention, a plurality of dust collecting holes are formed in the polishing member, the pad and the driving body, and the communication passage communicating with each of the dust collecting holes is provided. It is provided with a dust collection duct formed of an elastic member and having a dust collection path communicating with the communication path.

Therefore, dust generated during the sanding operation passes through a plurality of dust collection holes formed in the polishing member, the pad, and the driving body, and is collected in the dust collection duct through a communication path formed by the elastic member. It is sucked into the dust path and collected. And, for example, when this dust collection duct is provided integrally with the polishing apparatus main body, since the dust collection duct and the polishing apparatus main body are integrated, in the sanding work, the hand of the worker may not hit the dust collection duct. Absent. In addition, when the dust collection duct is provided separately from the main body and the dust collection duct is directly connected to the elastic member, the position of the dust collection duct can be changed by rotating the elastic member, and the dust collection duct is disturbed by the operator. Never be. Therefore, depending on the position of the dust collection duct,
The efficiency of the sanding operation does not decrease.

[0011]

Embodiments of the present invention will be described below with reference to FIGS. <First Embodiment> A first embodiment will be described with reference to FIGS. In these figures, 1 is a polishing apparatus main body, 2 is a front-rear output shaft of a motor (not shown) provided in the main body 1, and is rotatably supported by a bearing 3. Reference numeral 4 denotes a pinion gear provided at the distal end of the output shaft 2, and 5 denotes a vertical gear shaft provided in the head portion 1 a of the main body 1. The upper end is provided with a small bearing 6, and the lower end is provided with a large bearing 7. It is rotatably supported. Reference numeral 8 denotes a bevel gear fixed to a central portion of the gear shaft 5, meshing with the pinion gear 4, and rotating motion of the output shaft 2 is transmitted to the gear shaft 5 via the pinion gear 4 and the bevel gear 8, and the gear shaft 5 is Rotate.

Reference numeral 9 denotes a projecting rod projecting from the end face of the gear shaft 5, and a tip of the projecting rod 9 is a head 1a of the main body 1.
From the opening 10. 11 is a balancer press-fitted into the protruding rod 9, 12 is an annular tapered portion protruding from the peripheral edge of the opening 10, 13 is a substantially cylindrical elastic member, and the inner surface of the upper peripheral edge is tapered. 12 and is provided rotatably. And the elastic member 13
Since the inner surface of the upper peripheral portion of the second member is engaged with the tapered portion 12 in a state of being expanded, the force for contracting by the elastic force of the elastic member 13 acts on the inner surface as a reaction, The inner surface of the upper peripheral portion of the member 13 is tapered
Will be engaged by pressure. However, the engagement by the pressure contact is such that the elastic member 13 can rotate.
Reference numerals 14 denote support posts integrally provided at three places of the elastic member 13, which are arranged at equal intervals on the peripheral surface of the elastic member 13.

Reference numeral 15 denotes a driving body having a regular triangular shape, 17 denotes a cylindrical insertion portion formed integrally with a center portion of the driving body 15, 1
Reference numeral 8 denotes an annular bearing holder integrally provided on the inner peripheral surface of the upper end of the insertion portion 17, and the tip of the balancer 11 is located in the bearing holder 18. 19 is the insertion section 1
7 are formed on three lines on the outer peripheral portion of the drive member 7 and are located on a line connecting each of the front end portions 16 of the driving body 15 and the center and between the respective front end portions 16 and the center. Body 1
5 are formed on the same circumference centered on the center. 2
Reference numeral 0 denotes an annular locking body formed outside the insertion member 17 and concentrically with the insertion portion 17. Then, the end of the support 14 of the elastic member 13 is fitted into the concave portion 19, and the locking body 20 is locked on the lower inner peripheral surface of the elastic member 13, and the driving body 15 is fitted to the elastic member 13. Have been. The elastic member 13 covers the outside of the balancer 11 and the insertion portion 17 of the protruding rod 9.

Reference numeral 21 denotes a vertical eccentric shaft integrally formed with the balancer 11, and the center of the eccentric shaft 21 is eccentric with respect to the center of the gear shaft 5. Reference numeral 22 denotes a bearing of an eccentric shaft 21 positioned by the bearing holder 18 and fixed to the inner peripheral surface of the insertion portion 17.
And is located at the upper end of the eccentric shaft 21. Reference numeral 23 denotes a disk-shaped receiving bracket attached to the lower end surface of the eccentric shaft 21 by a flathead screw 24.
Is a spring provided between the bearing 22 and the receiving member 23, and is urged by the spring 25 in a direction in which the driving body 15 is pressed against the elastic member 13.

Reference numeral 26 denotes a bearing cap inserted through the insertion portion 17, and an open end face is in contact with the bearing 22. Reference numeral 27 denotes an annular flange protruding from the peripheral surface of the bearing cap 26. The flange 27 is screwed into the driver 15 through a mounting screw 28, and the bearing cap 26 is attached to the driver 15. ing. Reference numeral 29 denotes a pad made of an elastic member having the same shape as the driving body 15, and is fixed to the lower surface of the driving body 15. Reference numeral 30 denotes a polishing member having the same shape as the driving body 15, which is attached to the lower surface of the pad 29. Then, the driving body 15 makes an eccentric motion by the rotation of the eccentric shaft 21.

Next, the operation will be described. When the output shaft 2 of the motor is rotated from the state shown in FIG.
Gear shaft 5 and eccentric shaft 21 via bevel gear 8
Rotates. The rotation of the eccentric shaft 21 causes the driving body 15 to eccentrically move. This eccentric motion is caused by the eccentric shaft 21 being driven by the driving body 1.
5 is a rotational movement caused by eccentricity with respect to the center of the driving body 15.
In No. 6, the movement becomes larger in proportion to the distance from the center, and in addition to the movement in the front-rear direction, the movement in the left-right direction is caused, thereby causing an elliptical movement. Therefore, the column 14 is positioned on a line connecting the respective end portions 16 of the driving body 15 and the center, and between the respective end portions 16 and the center, and on the same circumference centered on the center of the driving body 15. By disposing them at three positions, the movement in the left-right direction due to the displacement of the center can be absorbed by the columns 14. The balancer 11 is provided on the eccentric shaft 9 so that the eccentric movement of the driving body 15 is performed smoothly.

When the tip 16 of the driving body 15 is worn by the sanding operation, the driving body 15 is
Pull slightly downwards against 5. That is, the driving body 15
Is slightly separated from the end of each support 14 of the elastic member 13. At this time, the spring 25 is compressed by the downward movement of the driving body 15. At this time, the locking body 20 of the driving body 15 is in a state of being locked on the inner peripheral surface of the elastic member 13, and the driving body 15 does not deviate from the elastic member 13. Next, in a state where the concave portion 19 of the driving body 15 is separated from the end of the support 14 of the elastic member 13, the driving body 15 is rotated, and the other end 16 is positioned in the axial direction of the output shaft 2 of the motor. Let it. Then, the driving body 15 is urged toward the elastic member 13 by the urging force of the spring 25, the recess 19 of the driving body 15 fits into the end of each of the columns 14 of the elastic member 13, and the driving body 15 Is fitted to. In addition, the polishing apparatus of the present invention can easily perform not only the sanding work by the distal end portion 16 of the driving body 15 but also the sanding work by the sides of the driving body 15, and the driving body 15 is fitted to the elastic member 13. In this state, by rotating the driving body 15 and the elastic member 13 together, the side of the driving body 15 can be located at a position orthogonal to the axial direction of the output shaft 2 of the motor. This case is suitable for sanding the inner surface of the corner of the box with the side of the driving body 15.

Thus, according to the polishing apparatus of the present invention,
The driving body 15 is urged toward the elastic member 13 by a spring 25 so that the driving body 15 is locked to the support 14 and the locking body 20 of the elastic member 13, and the driving body 15 is provided so as to be able to be fitted to and removed from the elastic member 13. Therefore, the position of the distal end portion 16 of the driving body 15 can be easily changed only by pulling out and rotating the driving body 15. Further, the elastic member 13 is connected to the head 1.
a so as to be rotatable on the tapered portion 12 of FIG.
The tip 16 and the side of the driving body 15 can be located at desired positions.

<Second Embodiment> Next, a second embodiment will be described with reference to FIGS. In these figures, the same reference numerals as those in FIGS. 1 to 3 indicate the same or corresponding elements. Numeral 31 denotes a dust collecting duct formed integrally with the polishing apparatus main body, which has a dust collecting path 32, an opening 33 is formed at one end, and the other end is connected to the dust collector. 3
Reference numeral 4 denotes an annular locking groove formed on the upper outer peripheral surface of the elastic member 13.
Are locked, and the elastic member 13 is rotatably provided on the periphery of the opening 33. 35 is the eccentric mechanism and the elastic member 13
And is in communication with the dust collection path 32. Reference numeral 36 denotes a plurality of arc-shaped first dust collection holes, which are formed on the peripheral surface between the insertion portion 17 of the driving body 15 and the locking body 20. Reference numeral 37 denotes a plurality of second dust collecting holes,
Of the polishing member 30 and the pad 29. And the second dust collecting hole 3
7, the first dust collection hole 36, the communication path 35, and the dust collection path 32 communicate with each other.

As in the case of the first embodiment, the driving body 15 and the elastic member 13 are rotated integrally with the driving body 15 in a state of being fitted to the elastic member 13 so that the driving body 1 is rotated.
5 can be positioned at desired positions, and the driving body 15 can be pulled downward against the spring 26 and rotated to change the position of the front end 16 of the driving body 15. Can be. Further, dust generated at the time of the sanding operation passes from the second dust collecting holes 37 of the polishing member 30 and the pad 29, passes through the first dust collecting holes 36 of the driving body 15, and passes through the communication passage 35 of the elastic member 13. It passes through the dust collection path 32 and is collected by the dust collector. In this case, since the dust collection duct 31 is provided integrally with the main body 1, in the sanding work, the hand of the worker does not hit the dust collection duct 31 as in the related art, and does not hinder the sanding work. Work efficiency can be improved.

In the case of the second embodiment, the dust collection duct 31 is integrally formed inside the lower part of the main body 1.
1 may be provided separately from the main body 1, and one end of the dust collection duct 31 may be connected to the elastic member 13. in this case,
It is necessary to rotate the elastic member 13 and position the dust collection duct 31 at a desired position so that the dust collection duct 31 does not hinder the worker.

As described above, in any of the first and second embodiments, the elastic member 13 is rotatably provided between the main body 1 and the driving body 15 so that the distal end of the driving body 15 can be formed with a simple structure. The position of the part 16 and the side can be changed.

[0023]

As described above, according to the polishing apparatus of the present invention, the elastic member is rotatably provided between the opening of the head portion and the driving member, so that the driving member fitted to the elastic member is provided. The position of the tip and sides of the body can be easily changed. Further, the driving body is pressed against the elastic member by the urging means, and the driving body is removably provided on a column integrally formed with the elastic member, and the driving unit is used for sanding work by fitting to the column. Easy to position the tip, and
It can be changed with a simple configuration. Further, the dust generated during the sanding operation passes through a plurality of dust collection holes formed in the polishing member, the pad, and the driving body, and passes through a communication passage formed by the elastic member to the dust collection passage of the dust collection duct. Can be collected.

[Brief description of the drawings]

FIG. 1 is a cut-away side view showing a main part of a first embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a cut-away side view showing a main part of a second embodiment of the present invention.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is a front view of FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Polishing apparatus main body, 1a ... Head part, 2 ... Output shaft, 13
... Elastic body, 14 ... Post, 15 ... Driver, 16 ... Tip,
19 ... concave part, 25 ... spring, 29 ... pad, 30 ... polishing member, 31 ... dust collection duct, 32 ... dust collection path, 35 ... communication path,
36: dust collecting hole, 37: dust collecting hole.

Claims (3)

[Claims] 1. A driving body is connected to an output shaft of a motor provided in a main body of a polishing apparatus via an eccentric mechanism provided in a head portion of the main body of the polishing apparatus. In a polishing apparatus provided with a polishing member, a cylindrical elastic member engaged with the open end is rotatably provided between the open end of the head portion and the driving body. A polishing apparatus characterized in that a driving body is fitted to a member, and the driving body is positioned at a desired position by rotation of the elastic member. 2. The driving body is pressed against the elastic member by a biasing means, and is provided so as to be detachable from a column integrally formed with the elastic member, and is sanded by fitting to the column. The polishing apparatus according to claim 1, wherein a tip portion of the driving body used at the time of work is positioned in an axial direction of an output shaft of the motor. 3. A plurality of dust collecting holes are formed in the polishing member, the pad and the driving body, and a communication passage communicating with each of the dust collecting holes is formed by the elastic member and communicates with the communication passage. The polishing apparatus according to claim 1, further comprising a dust collection duct having a dust collection path.