JPH077087Y2 - Belt sander used for chamfering etc. - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial field of application] The present invention is used in the processing industry for chamfering various materials such as wood, stone, non-metals, metals, and rubbers, and the polishing body can be used without waste, ensuring The present invention relates to a belt sander used for chamfering, etc. that enables accurate curved surface polishing.

[0002]

2. Description of the Related Art Conventionally, a belt sander used in the woodworking industry or the like is a polishing means in which an endless polishing band is provided over a driving wheel and a driven wheel arranged in the vertical direction of a machine base. And a table on the machine stand opposite the polishing means,
It is composed of a drive device such as a motor linked to the polishing means provided on the machine base, and in use, the processed product assembled in a box shape, for example, is placed on the table and the corners of the processed product are rotated. Chamfering is performed by applying the chamfer to the polishing band of the polishing means.While chamfering, while pressing the workpiece against the polishing band that rotates at a fixed position, the workpiece is swung at an irregular speed and irregular pressing force. Since the chamfered portion is formed by polishing the edge into a curved surface, the chamfering becomes uneven, and the uniform chamfering requires experience, and the polishing work cannot be performed quickly and smoothly. Since the chamfer is made by abutting the processed product only on a specific part of the surface of the polishing band in the means, the abrasion of the polishing band is extremely fast when polishing continuously, and there are many unused parts where the processed product does not hit and there is much waste. There was.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its purpose is to rotate a polishing means provided on a machine base at a fixed angle corresponding to a polishing section. The polishing means can be tilted so that machining can be performed at a constant angle, speed, and pressure, and uniform chamfering can be performed accurately, quickly, and easily without experience. Can be done,
An object of the present invention is to propose a belt sander for use in chamfering and the like, which has good workability and can use the polishing surface of the polishing body without waste.

[0004]

As a means for solving the above-mentioned problems, a belt sander used in the chamfering process of the present invention is a drive wheel 3 and a driven wheel 3 arranged in a vertical direction of a swivel base 2 in a machine base 1. Polishing means a, which is formed by bridging an endless polishing body 5 on a car 4, and turning means b, which is provided on the turning base 2 and is linked to the grinding means a so as to be able to turn about a spindle 6 of the means. The tilting operation means c of the polishing means a is provided on the swivel base 2 and is linked to the polishing means a, and the table 7 is provided on the machine base 1 and is movable back and forth.

[0005]

When the chamfering of the box body 28 is performed by using the belt sander of the present invention, the polishing means a is driven to drive the polishing body 5.
After rotating the table 7 and pulling out the table 7 to the front, and then placing the processing box 28 on the table 7,
The table 7 is pushed to bring the corner edge a of the box 28 into contact with the rotating polishing body 5, and the turning means b is actuated to turn the grinding means a by the turning of the turning base 2 so that the corner edge a is rotated at a substantially right angle. Is polished by the polishing body 5 into a curved surface. After further polishing one surface, the table 7 is automatically returned to the front by the pulling force of the hanging weight.
The processing part is changed and the polishing is performed in the same manner as described above, and the other corner edges are also similarly polished by repeating this work step, and after each corner edge a is polished in a predetermined manner, the table 7 is pulled out and the next polishing is performed. Replace with the box. Further, in the case where the processed box body is continuously polished, polishing continuously at the same location on the polishing surface of the polishing body 5 causes rapid damage due to clogging or wear and reduces polishing ability. As shown in FIG. 8, the tilting operation means c linked to the polishing means a holds the state where the polishing means a is tilted at a predetermined angle with respect to the working / polishing section, and performs polishing, whereby the entire polishing surface can be polished. Therefore, the polishing body 5 can be effectively used, and the polishing body 5 can be used without waste.

[0006]

1 is a side view showing the entire sander, FIG. 2 is a front view showing the same, and FIG. 3 is a front view showing the same.
Is a plan view, and in each drawing, reference numeral 1 denotes a machine base, on which a drive vehicle 3 and a driven vehicle 4 arranged in a vertical direction of a swivel base 2 are shown.
A polishing means a formed by bridging an endless polishing body 5 to
A swinging means b linked to the polishing means a so as to be rotatable around a spindle 6 of the same, and a polishing means a linked to the polishing means a.
The tilting operation means c and the table 7 provided on the machine base 1 that is movable back and forth, and the polishing means a and the drive wheel 3 provided below the revolving base 2 that is rotatably linked to the machine base 1. An endless polishing body 5 having a predetermined width is hung over a driven wheel 4 provided on the upper part, and the polishing body 5 can be rotated in the vertical direction as the drive wheel 3 rotates. On the 4 side, a tension adjusting means 10 for the polishing body 5 is provided, which is provided so that a bearing of a support shaft 8 of the driven wheel 4 can be raised and lowered by a turning handle 9 to prevent the polishing body 5 from slipping. Further, it is preferable to use a sand cloth body having predetermined particles as the polishing body 5, but the sand cloth body is not limited to the sand cloth body and may be selected according to the material of the object to be polished. Further, in the swivel base 2, one side of the lower surface is fixed to a rotatable support shaft 6 provided on the machine base 1 side, and a stay member 11 provided on the other side of the lower surface is loosely attached to the lower part of the support shaft 6. It can be freely supported, and as the support shaft 6 rotates, as shown in FIG.
As shown in FIG. 5, the swivel is possible within a range of about 90 °.

Next, a turning means b linked to the polishing means a
Is rotatably provided on the machine base 1, is provided in the middle of the support shaft 6, and is horizontally laid across the spur gear 12 and the bearings 13 of the machine base 1 so as to be movable left and right. An operating shaft 15 in which the round rack 14 is meshed with the spur gear 12,
The air cylinder 18 is provided on the machine base 1 and has a cylinder shaft 16 connected to the operation shaft 15 by a connecting member 17 for driving the operation shaft 15. The air cylinder 18 is configured so that the air supply can be adjusted. The movement speed of 16 can be adjusted. When turning the swivel base 2,
By supplying air to the air cylinder 18, the cylinder shaft 16 is actuated, the actuating shaft 15 connected via the connecting member 17 is moved accordingly, and the spur gear 12 meshed with the round rack 14 is moved. The supporting shaft 6 is rotated to rotate the swivel base 2. This turning is made so that it can turn in any of the left and right directions of the plane around the support shaft 6 (fulcrum a ').

Next, the polishing means a linked to the polishing means a
The tilting operation means c is a mounting body 19 of the polishing means a which also serves as a dust collecting casing, a support member 20 also serving as a dust collecting cylinder projecting from the mounting body 19, and the support member 20 being rotatably held. When the polishing means a is tilted, it is composed of a split-shaped receiving member 21 and a tightening tool 23 composed of a bolt and a nut inserted through the flange portions 22 of the receiving member 21. 23 is loosened, the receiving member 21 is expanded, and the supporting member 20 supported by the supporting member 21 is manually inclined at a predetermined angle to incline the polishing means a, and then the tightening tool 23 is tightened to fix it. The tilted state shown in FIG. 8 is maintained. By polishing in this inclined state, the entire polishing surface can be effectively used unlike the conventional polishing with only a part of the polishing body, and polishing without clogging or waste is possible. The receiving member 21 is provided with advance / retreat adjusting means 24 for the polishing portion having a screw feed structure. The handle of the advance / retreat adjusting means 24 is rotated, and the receiving member 21 is moved in the front-rear direction by the rotation of the feed screw, so that the position of the polishing means a in the front-rear direction can be adjusted and the polishing curvature of the curved surface can be freely adjusted. Can change.

Next, the table 7 provided on the machine base 1 so as to be movable back and forth is composed of a fixed portion 25 and a movable portion 26, and the movable portion 26 has a substantially triangular shape on a plane.
7 is mounted to correspond to the polishing body 5, and the movable portion 26 is configured to automatically return to the front by the pulling force of the hanging weight (not shown), and along the corresponding sides B and B in the triangle. Stoppers 27 and 2 made of thin material
7 is provided, the movable portion 26 is moved to the front, the corner edge a of the box 28 is aligned with the movable portion 26 and applied to the stoppers 27, 27, and then the movable portion 26 is advanced to move the corner edge. When b comes into contact with the polishing body 5 of the polishing means a and the movable portion 26 comes into contact with the limit switch 29 provided on the machine base 1 side, the revolving means b is actuated, the revolving base 2 is rotated, and the polishing means a is substantially moved. The chamfering is performed by turning the corner edge a in an arc shape by turning at an angle of 90 °. A safety cover 30 is provided to keep the work safe as shown by the chain double-dashed line in FIG.

5 and 6 show a conventional polishing body 5 '.
FIG. 7 and FIG. 8 show an example in which the polishing is performed without tilting, and when chamfering the corner edge “a” of the box body 31, only a part of the polishing body 5 ′ is worn and wasteful. According to the method described above, the polishing body 5 is polished in a tilted state, and when the corner edges of the box body 28 are chamfered, the entire polishing cloth surface of the polishing body 5 can be effectively used and clogging is achieved without waste. It enables polishing without scratches.

Although the box 27 is chamfered in the above embodiment, the belt sander of the present invention is made of plastic,
It is possible to directly polish not only a box body but also a plate material as well as a material made of other materials such as a stone material and a light metal such as aluminum, and in that case, a polishing body suitable for each polishing processed material is used.

[0012]

EFFECTS OF THE INVENTION The belt sander used for chamfering and the like according to the present invention is such that the endless polishing body is laid over the driving vehicle and the driven vehicle arranged in the vertical direction of the swivel base of the machine base as described above. Polishing means, and a turning means provided on the turning table and linked to the grinding means so as to turn about a spindle of the means, and a tilting means for the grinding means provided on the turning table and linked to the grinding means. And a table that can be moved back and forth provided on the machine base. Therefore, when chamfering a box or the like, uniform polishing can be obtained by the rotating polishing means. Even if a large number of workpieces are polished, uneven chamfering does not occur and a clean chamfering process can be performed at all times, and no special experience is required for the machining work, and quick and smooth polishing can be performed. . Further, since the polishing body can be polished in a tilted state, the entire surface of the polishing cloth can be used, so that the wear is not accelerated as in the conventional case, and there are particular effects such as a clean finish without waste.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a belt sander used for chamfering processing according to the present invention.

FIG. 2 is a front view according to the same embodiment.

FIG. 3 is a plan view showing a state in which a part of the embodiment is broken.

FIG. 4 is an explanatory diagram showing a chamfered state of the box body.

FIG. 5 is an explanatory diagram showing an example in which a polishing body is polished without being tilted.

FIG. 6 is a plan view of FIG.

FIG. 7 is an explanatory view showing an example in which a polishing body is polished in a tilted state.

FIG. 8 is a plan view of FIG.

[Explanation of symbols]

 1 machine base 2 swivel base 3 drive vehicle 4 driven vehicle 5 polishing body a polishing means 6 spindle b turning means c tilting operation means 7 table

Claims (1)

[Scope of utility model registration request] 1. A polishing means a formed by bridging an endless polishing body 5 between a drive wheel 3 and a driven wheel 4 arranged in a vertical direction of a swivel base 2 of a machine base 1, and a polishing means a provided on the swivel base 2. A swiveling means b which is rotatably linked to the polishing means a about a support shaft 6 of the same means, a tilting operation means c of the polishing means a which is provided on the swivel base 2 and is linked to the polishing means a, and a machine base 1 A belt sander used for chamfering or the like, which is characterized by being configured with a table 7 that can be moved back and forth on the.