JPH07148655A - Polishing machine - Google Patents

Abstract

PURPOSE:To move a hollow member smoothly and stably by supporting the hollow member, supporting a driving shaft rotatably, by a supporting device. CONSTITUTION:A hollow member 13 supporting a driving shaft 18 rotatably is supported on a hollow member supporting device 152 oscillatingly provided at a bracket. In the case of desiring to move a sanding machine in the direction of a rotation axis, an operating part is operated so as to position a cam member 157 in an axially movable position. The hollow member 13 and the driving shaft 18 are held in the state of being movable in the direction of the rotation axis. In this state, a driver is driven to rotate the driving shaft 18 and to reciprocate the driving shaft 18 in the direction of the rotation axis by a moving mechanism part and in its turn rotate and reciprocate the sanding machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing machine, and more particularly to a polishing machine capable of restricting the movement of a sander in the direction of a rotation axis.

[0002]

2. Description of the Related Art Generally, while rotating a sander,
It is widely known that the sander is reciprocally moved and then a material to be polished is applied to the sander to perform polishing work.

However, depending on the work, there are cases where the movement of the sander in the direction of the rotation axis is not desired, and in such a case, a method of restricting the reciprocating movement of the sander in the direction of the rotation axis has been proposed (USP1849868).

This forms a cam groove on the outer periphery of the drive shaft,
A ring member having a cam engaged with the cam groove is slidably provided on the outer periphery of the drive shaft. The ring member is covered with a cover to restrict sliding on the drive shaft.

When the drive shaft is reciprocally moved in the axial direction, the sliding of the ring member with respect to the drive shaft is restricted by covering the cover. Then, when the drive shaft is rotated, the drive shaft reciprocates along the cam groove. Further, when the reciprocating movement of the drive shaft is restricted, if the cover is removed and removed, the ring member slides in the axial direction by the engagement of the cam and the cam groove due to the rotation of the drive shaft. This restricts the movement of the drive shaft in the axial direction.

[0006]

However, in the structure described above, the cam and the cam groove are engaged even when the drive shaft is not moved in the axial direction, and a friction noise is generated. There is a problem such as. Moreover, the switching operation is complicated because the cover is attached and detached.

The present invention has been made in view of the above-mentioned problems, and when the drive shaft is not moved in the axial direction, a quiet switching operation is performed to determine whether or not to move the drive shaft in the axial direction. It is an object of the present invention to provide a polishing plate that can be easily performed.

[0008]

SUMMARY OF THE INVENTION The present invention comprises a drive device,
A bracket that holds the drive unit, a drive shaft that is rotated by the drive unit, and a moving mechanism that moves the drive shaft in the axial direction during a polishing operation are provided on the bracket so that the bracket can swing. And a hollow member that is rotatably supported by the hollow member supporting device and that rotatably supports the drive shaft; A pawl member provided on the cam member, a cam member for rocking the pawl member to position the pawl member, and moving the cam member between an axially movable position of the hollow member and an axial movement restriction position. And an elastic member for constantly contacting the claw member with the cam member.

[0009]

When the sander is to be moved in the rotation axis direction, the operation member is operated to position the cam member at the axially movable position. As a result, the hollow member and the drive shaft are held movably in the rotation axis direction via the claw member and the hollow member support device. In this state, the drive device is driven to rotate the drive shaft, and the moving mechanism section reciprocates in the direction of the rotation axis, which in turn rotates and reciprocates the sander.

When the sander is not moved in the rotation axis direction, the operation member is operated to position the cam member at the axial movement restriction position. As a result, the hollow member and the drive shaft are held in a state in which their movement in the rotation axis direction is restricted via the pawl member and the hollow member support device. In this state, the drive device is driven to rotate the drive shaft, which in turn rotates the sander. However, the axial reciprocating movement of the hollow member and the drive shaft is restricted.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front sectional view of a polishing plate in the present invention, and FIG. 2 is a side sectional view. Note that FIG. 2 shows a state in which the drive shaft is horizontal. In FIG. 1, reference numeral 1 in the drawing is a housing, and a table 2 is fixed to the upper portion of the housing 1. An opening 2a is formed in the table 2, and holding plates 4, 4 are provided on opposite sides (left and right in FIG. 1) of the opening 2a via rotating pins 3, 3.
Is swingably provided about the rotary pin 3.
A bracket 5 is fixed between the holding plates 4 and 4 with screws 6, 6. A motor 7 is fixed to the bracket 5, and pulleys 8 and 9 are fixed to a motor shaft 7a of the motor 7. Further, the holding plates 4, 4
A handle shaft 10 is installed between the handle shaft 10 and the handle shaft 10. The guide shaft 1 has a circular arc shape and is formed in the housing 1.
a (see FIG. 2). A handle 11 is screwed to the right end side of the handle shaft 10 in FIG. By tightening the handle 11, the swing of the holding plate 4 is restricted. On the other hand, on the right side of the bracket 5 in FIG. 1, a recess 5a having a semicircular cross section which is long in the vertical direction in the figure is formed.

FIG. 3 is a partially enlarged sectional view of the vicinity of the recess 5a. A hollow member 13 is provided inside the recess 5a so as to be vertically movable in the figure. As shown in FIG. 4, the hollow member 13 is attached to the bracket 151 by a pin 151.
The pin 15 is attached to the link 152 that is swingably provided via
It is pivotally connected via 3. Here, this link 152
4 has a substantially ladder-like shape in plan view as shown in FIG. 4, and is configured such that a part of the bracket 5 and the hollow member 13 is located between the ends thereof. In addition, this hollow member 13
A spring 15 is interposed between the link 152 and the flange portion 5b formed on the inner peripheral portion of the recess 5a at a proper position on the outer periphery of the spring. The hollow member 13 is biased downward in the drawing by the biasing force of the spring 15. A drive shaft 18 is rotatably provided inside the hollow member 13 via bearings 17, 17. A pulley 19 is fixed to the lower end portion of the drive shaft 18 in the figure.
Between the belt 2 and the pulley 8 fixed to the motor shaft 7a.
0 is stretched. Further, in FIG. 3, a pulley holder 21 is fixed to the lower end of the recess 5a, and a pulley 22 is rotatably provided on a shaft 22 fixed to the pulley holder 21 via a bearing 23. . In FIG. 1, a belt 25 is stretched between the pulley 24 and the pulley 9 fixed to the motor shaft 7a. here,
The outer diameters of the pulley 19 and the pulley 24 are slightly different.
Further, in FIG. 3, a cam 24a is formed on the side of the pulley 24 that faces the pulley 19, and the pulley 19 is formed with an abutting portion 19a that abuts on the cam 24a. At this time, since the pulleys 19 and 24 have different outer diameters, the pulleys 19 and 24 are rotated,
The contact position between the contact portion 19a and the cam 24a changes, and the pulley 19 and thus the drive shaft 18 reciprocates in the vertical direction in FIG. On the other hand, a drive roller 27 is fitted over the drive shaft 18 via a felt 26 and fixed by a nut 28 above the drive shaft 18. A lock ring 29 is fixed to an intermediate portion of the drive shaft 18, and a lock pin 30 that can be engaged with and disengaged from the lock ring 29 is provided in the recess 5a so as to be movable in the left-right direction. Button 3 on this lock pin 30
1, the lock pin 30 can be disengaged from the lock ring 29 by an ON-OFF operation of the button 31.
By engaging the lock pin 30 with the lock ring 29, the rotation of the drive shaft 18 is restricted. On the other hand, an engaging member 33 is disposed on the outer side of the table 2, and a screw portion (not shown) formed on the engaging member 33 penetrates the side plate portion of the table 2 and is embedded in the fixed handle 34. It is screwed to the nut 35. The front and rear rails 3 are attached to the engaging member 33.
6 is engaged with the groove 36a, and the fixed handle 3
The front and rear rails 36 are set on the side surface portions of the table 2 by tightening 4. Note that, in FIG. 1, the front and rear rails 36 are also held on the left side in the drawing with the same configuration.

In FIG. 1, a platen 37 is removably provided on the upper surface of the bracket 5. The surface plate 37 guides the movement of the endless belt sander 38, and when a material to be polished (not shown) is pressed against the belt sander 38, the belt sander 38 bends and the polishing work is sufficiently performed. This is to prevent the failure. The surface plate 37 is provided with a pin 39 for positioning the surface plate, and the insertion hole 5c into which the pin 39 can be inserted.
Are formed at appropriate positions on the bracket 5. The surface plate 37 is fixed to the bracket 5 by the surface plate fixing mechanism section 40.

On the other hand, in FIG. 2, a guide plate fixing screw 56 is attached to the table 2, and the guide plate fixing screw 56 is provided with a guide plate 57 for guiding the material to be polished. This guide plate 57 is a guide plate fixing screw 5
It is rotatable about the axis of 6, and the contact angle of the material to be polished with the belt sander 38 or the like can be adjusted. Further, the guide plate 57 is constructed so that the position thereof can be adjusted in the left-right direction in FIG. On the other hand, at the center of the hollow member 13, a hollow member up-and-down regulating mechanism 58 is arranged.

FIG. 5 is a view showing the hollow member up-and-down regulating mechanism portion 58. Reference numeral 154 in the drawing denotes a claw member, and the claw member 154 is rotatably provided on a pin 155 provided on the bracket 5 (FIG. 1). Also, this pin 1
In the vicinity of 55, the bracket 5 (FIG. 1) has a shaft 15
6 is rotatably provided. Cam 1 on this shaft 156
57 is fixed. In addition, the pin 155 has a spring 1
58 is wound and is interposed between the shaft 156 and the claw member 154, and constantly urges the claw member 154 counterclockwise in the drawing around the pin 155. And this spring 1
The claw member 154 is constantly pressed by the cam 157 by 58. Further, a handle 62 (FIG. 2) that is movable along the hole 1b of the housing 1 is screwed to the end of the shaft 156, and the shaft 156 can be rotated by operating this handle 62.

The operation of the polishing plate thus constructed will be described in detail below. First, the use of the belt sander 38 in an upright state as shown in FIG. 6 will be described. In FIG. 2, the handle 11 is loosened, moved along the guide hole 1a, positioned at an appropriate position, and fastened, so that the holding plate 4 also moves through the handle shaft 10 attached to the handle 11 in FIG. It rotates around the rotating pin 3, and the bracket 5 also rotates. This allows
The drive roller 27 and the driven roller 50 (see FIG. 1) can be erected. After that, the roller bracket 44
The surface plate 37 provided with is fixed to the bracket 5. In this surface plate 37, the pin 39 fixed to the surface plate 37 is inserted into the insertion hole 5c of the bracket 5 in FIG.
It is fixed to the bracket 5 by 0. After that, the belt sander 38 is bridged between the drive roller 27 and the driven roller 50, and the driven roller 50 is moved leftward in the drawing, whereby the belt sander 38 is tensioned. Further, after the belt sander 38 is stretched, the belt cover is fixed to the bracket 5. Then, the motor 7 is driven to drive the motor shaft 7a.
The pulleys 8 and 9 are rotated via. This pulley 8, 9
The pulley 1 through the belts 20 and 25 with the rotation of the
9, 24 rotate. As the pulley 19 rotates, the drive shaft 18 also rotates, and the drive roller 27 also rotates. The rotation of the drive roller 27 causes the belt sander 3 to rotate.
8 moves with the driven roller 50. On the other hand, since the outer diameters of the pulley 19 and the pulley 24 are slightly different, the rotational speeds of the two pulleys 19 and 24 are different. Therefore, in FIG. 3, the contact position between the contact portion 19a of the pulley 19 and the cam 24a of the pulley 24 changes, so that the pulley 19 moves vertically in FIG. Accordingly, the drive roller 2 is driven through the drive shaft 18.
7 also moves up and down. Therefore, one side of the belt sander 38 moves up and down, and the polishing efficiency can be improved. In this state, a material to be polished (not shown) is placed on the guide plate 57 (see FIG. 2).
It is possible to perform the polishing work by the belt sander 38 by bringing the belt sander 38 into contact with the belt sander 38 while guiding the belt sander 38.

As the drive roller 27 moves up and down,
The hollow member 13 also moves up and down. Therefore, by controlling the vertical movement of the hollow member 13, the vertical movement of the drive roller 27 can also be regulated. Drive roller 27 below
The case where the vertical movement of is not desired will be described in detail.

FIG. 5 shows a state in which the hollow member 13 can move up and down. That is, the hollow member 13 is in a state where it can move upward in the figure. In this state, the handle 62
(See FIG. 2) to rotate the shaft 156. The cam 157 also rotates integrally with the rotation of the shaft 156, whereby the pawl member 154 rotates about the pin 155 and the spring 15 moves.
It rotates clockwise in the figure against the biasing force of 8. Then,
By the claw member 154 pushing up the link 152,
The hollow member 13 moves upward in the figure. This hollow member 13
3 along with the upward movement of the drive roller 2 in FIG.
The drive shaft 18 with 7 also moves upwards. For this reason,
The contact portion 19a of the pulley 19 is separated from the cam 24a of the pulley 24. Therefore, even if the pulley 19 and the pulley 24 rotate, the pulley 19 does not move up and down in FIG. 3, and the drive roller 27 does not move up and down. Further, at this time, since the contact portion 19a and the cam 24a are separated from each other, no friction noise is generated due to the contact between the contact portion 19a and the cam 24a, which is quiet.

Since the link member 152 is used to move the hollow member 13 in the axial direction as described above, the belt 20 stretched around the drive shaft 18 by the pulley 19 and the belt sander stretched by the drive roller 27. Even if an external force is applied by the shaft 38 in a direction orthogonal to the axial direction, the hollow member 13 can be smoothly moved in the axial direction because it is positioned by the link 152.

Further, by operating the handle 11 in FIG. 2 to incline the bracket 5 (see FIG. 1) appropriately, the working surface of the belt sander 38 becomes parallel to the surface of the table 2 as shown in FIG. can do. In this case, it is particularly effective for polishing a flat surface.

[0021]

As described above, according to the present invention, the operation unit can easily perform the switching operation as to whether or not to move the drive shaft in the axial direction. Further, since the hollow member is moved by the hollow member supporting device, this movement is smooth, and there is an effect that it can be moved stably.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view of a polishing disk according to the present invention.

FIG. 2 is a side sectional view of a polishing plate in the present invention.

FIG. 3 is an enlarged cross-sectional view of the vicinity of a concave portion of the polishing plate of the present invention.

FIG. 4 is a partial plan view of the polishing plate of the present invention.

FIG. 5 is a view showing a hollow member up-and-down regulating mechanism portion of the polishing plate in the present invention.

FIG. 6 is a perspective view of a polishing plate according to the present invention.

FIG. 7 is a perspective view of a polishing plate according to the present invention.

[Explanation of symbols]

 5 ... Bracket 7 ... Motor (driving device) 13 ... Hollow member 18 ... Drive shaft 19a ... Abutting part (moving mechanism part) 24a ... Cam part (moving mechanism part) 62 ... Handle (operation handle) 152 ... Link (hollow member) Supporting device) 154 ... Claw member 157 ... Cam (cam member) 158 ... Spring (elastic member)

Claims (3)

[Claims] 1. A polishing machine having a drive device, a bracket for holding the drive device, a drive shaft rotated by the drive device, and a moving mechanism portion for moving the drive shaft in the axial direction during polishing work. A polishing machine comprising: a hollow member supporting device swingably provided on the bracket; and a hollow member supported by the hollow member supporting device and rotatably supporting the drive shaft. . 2. A claw member that is abuttable to a hollow member supporting device and is swingable, a cam member that swings the claw member to position the claw member, and the cam member. The polishing machine according to claim 1, further comprising: an operation unit that moves the hollow member between an axially movable position and an axially movement-restricted position. 3. The polishing machine according to claim 2, further comprising an elastic member that allows the pawl member to constantly contact the cam member.