JPH0440843Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a guide rule for a belt sander that grinds a workpiece by circulating an endless sanding belt.

(Prior Art) As a conventional technology, there is, for example, Japanese Unexamined Patent Publication No. 49-59394.

(Problems to be Solved by the Invention) The purpose of the invention is to provide a guide rule that solves the problem of unstable grinding posture of a workpiece to be ground.

(Means for Solving the Problems) In the present invention, an endless sanding belt is attached to a plate holder which is formed to be removably attached to a belt sander main body which is rotatably supported. A guide plate having a rule surface formed along the grinding surface of the sanding belt for bringing the side surfaces into contact with each other is attached so as to be adjustable in tilt in a plane direction perpendicular to the rule surface, and is juxtaposed with the grinding surface. Then, a cover plate formed to cover the vicinity of the rear bending part of the sanding belt and on which a part of the work is placed is advanced to the rear of the grinding surface and retreated from the rear of the grinding surface. The gist is the guide rules that have been implemented as far as possible.

(Function) The guide rule of the present invention sets the grinding angle of the workpiece by adjusting the tilting of the rule surface formed to bring one side of the workpiece into contact in a direction perpendicular to this rule surface, and also sets the grinding angle of the workpiece. When the workpiece is advanced and the cover plate supported so as to be retractable from the rear is advanced, the cover plate supports a part of the workpiece and covers the rear side of the grinding surface.

(Example) Next, an example of the present invention will be described with reference to the drawings.

A belt sander stand 1 provided to removably support a belt sander main body H has a rectangular trapezoidal base 2 and a base 2 whose longitudinal section is approximately L-shaped.
The pressure plate 3 is fixed near the upper rear end (right end in the figure) and has a backing plate 3a arranged in parallel so that it can be separated.
A butterfly head bolt 4 inserted through a is screwed horizontally.

The housing 5 of the belt sander main body H, which houses the drive mechanism, has a handle portion 5a formed protruding from the rear end and is sandwiched between the pressure plate 3 and the backing plate 3a of the belt sander stand 1, so that the belt sander stand 1, and when the handle portion 5a is sandwiched between the pressure plate 3 and the backing plate 3a, it can be used immovably fixed on the belt sander stand 1, and When the handle portion 5a is detached from the pressure plate 3, the belt sander main body H can be held in any position and used.

An endless sanding belt 7 installed on the housing 5 to grind the workpiece is rotatably driven by a drive mechanism inside the housing 5.
It is hung so as to be able to rotate around the pair of rollers 6, 6,
A ground surface 8 is horizontally formed on the upper surface of the upper straight section 7a with a receiving plate 9 attached to the lower surface, and a ground surface 8 is formed horizontally on the upper surface of the upper straight section 7a, and a ground surface 8 is formed horizontally on the upper side curved section 7b. A cover 5b is provided oppositely.

Next, a guide rule G that is detachably attached to the belt sander main body H in order to define the grinding posture of the workpiece to be ground will be explained.

The plate holder 10 of the guide rule G is attached to the upper end of the housing 5 on one side of the grinding surface 8 of the sanding belt 7, and is fastened to the housing 5 via a butterfly head bolt 11 at its lower center end. A protruding piece 10a is formed protrudingly at the front and rear ends thereof, and a pair of supporting pieces 10 are bent upwardly at both the front and rear ends of the protruding piece 10a.
b, 10b are formed.

The guide plate 12 includes a base piece 12a having a rule surface 13 formed along the side edge of the grinding surface 8 of the sanding belt 7 in order to bring one side of the workpiece into contact with each other and define the angle of the lower surface of the workpiece. The plate holder 10 is provided with connecting pieces 12b, 12b which are bent at both front and rear ends of the base piece 12a, respectively.
The connection piece 12b and the support piece 10b of the plate holder 10 are supported through a connection pin 14 inserted through the connection piece 12b and the support piece 10b of the plate holder 10 so as to be tiltable in a plane direction perpendicular to the rule plane 13. The tilting can be adjusted with respect to the plate holder 10 through adjustment screws 17, 17, which are inserted through the arc-shaped adjustment holes 15 and both support pieces 10b, and into which wing nuts 16 are screwed, respectively. The angle scale 18 displayed on the upper edge of the connecting piece 12b indicates the intersection angle of the guide surface 13 with respect to the grinding surface 8 by approximately 45°.
It can be adjusted and set over ~90°.

A cover plate 19 is connected to the rear end of the plate holder 10 in order to cover the vicinity of the rear curved portion 7b and to place a part of the workpiece in parallel with the grinding surface 8 of the sanding belt 7. Near the edge and
The plate holder 10 is supported so as to be rotatable in the horizontal direction about a connecting bolt 20 inserted through the vicinity of the rear end of the plate holder 10, and a projection bent slightly upward and aligned with the grinding surface 8 is provided at the rear end. The edge 19a is formed horizontally at the rotation end so as to extend along the width direction of the sanding belt 7, and the cover plate 1
Positioning convex portion 19 slightly protruding near the base end of 9
When the connecting bolt 20 is engaged with the locking hole 10c provided through the rear end of the plate holder 10,
and the wing nut 2 screwed onto this connecting bolt 20.
1, the cover plate 19 is placed in a state in which the projecting edge 19a is placed horizontally on the extended surface of the grinding surface 8.
is placed on the rear cover 5b and advances to the rear of the grinding surface 8, while the connecting bolt 20 and wing nut 2
When the first fastened state is released, the cover plate 19 can be rotated laterally and retreated from behind the grinding surface 8.

Next, the operation and effects of the embodiment having the above configuration will be explained.

In this example, one side of the workpiece is brought into contact with a plate holder 10 formed to be removably attached to a belt sander main body H on which an endless sanding belt 7 is rotatably supported. A guide plate 12 having a rule surface 13 formed along the grinding surface 8 of the sanding belt 7 is attached so as to be tiltable in a plane direction orthogonal to the rule surface 13.
0 has a sanding belt 7 juxtaposed with the grinding surface 8.
A cover plate 19 is formed to cover the vicinity of the rear curved portion 7b and to place a part of the workpiece thereon.
is attached so that it can advance toward the rear of the grinding surface 8 and retract from the rear of the grinding surface 8.

Therefore, when the cover plate 19 is advanced to the rear of the grinding surface 8 during grinding of the workpiece, a part of the workpiece is supported on the extended surface of the grinding surface 8, and the grinding posture of the workpiece is stabilized. The contact state with the grinding surface 8 is balanced, and the workpiece can be ground accurately, and the cover plate 19 prevents the workpiece from being bitten between the rear curved portion 7b of the sanding belt 7 and the rear cover 5b. This makes the grinding work safer, and furthermore, when the cover plate 19 becomes an obstacle to the grinding work, the cover plate 19 can be easily evacuated from behind the grinding surface 8.

Therefore, there is an effect that the mechanism for regulating the grinding posture of the workpiece can be simplified and its operation can be simplified.

(Effect of the invention) In other words, the present invention has a plate holder formed for removably attaching an endless sanding belt to a belt sander main body which is rotatably supported. A guide plate whose rule surface for contacting is formed along the grinding surface of the sanding belt is attached so as to be adjustable in tilt in a plane direction perpendicular to the rule surface, and is juxtaposed with the grinding surface. A cover plate formed to cover the vicinity of the rear bending part of the sanding belt and on which a part of the work is placed is installed so as to be able to advance to the rear of the grinding surface and retreat from the rear of the grinding surface. This has the effect of stabilizing the grinding posture of the workpiece and simplifying the mechanism for regulating this grinding posture.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view of a belt sander, FIG. 2 is a plan view, and FIG. 3 is an enlarged sectional view taken along line X-X of FIG.
FIG. 4 is also an enlarged sectional view taken along the Y-Y line. 7... Sanding belt, 8... Grinding surface, 1
0... Plate holder, 12... Guide plate, 13... Rule surface, 19... Cover plate, H... Belt sander body.

Claims (1)

[Scope of utility model registration request] A plate holder formed to removably attach an endless sanding belt to a belt sander main body that is rotatably supported has a rule surface for bringing one side of the workpiece into contact with the sanding belt. A guide plate formed along the grinding surface of the belt is attached so as to be tiltable in a plane direction perpendicular to the rule surface, and is placed in parallel with the grinding surface near the rear curved portion of the sanding belt. A belt sander characterized in that a cover plate formed to cover the workpiece and to place a part of the workpiece is attached so as to be able to advance to the rear of the grinding surface and retreat from the rear of the grinding surface. Guide rules for.