JPH0839349A - Blade of spare blade type saw, and automatic sharpening device therefor - Google Patents

Abstract

PURPOSE:To provide a saw body of change edge type saw which can be used for groove-sawing as well as general timber-cutting, and a device for manufacturing it. CONSTITUTION:This saw has saw teeth formed continuously with a circular formed edge continued to a linear formed edge. The saw teeth are automatically formed on the formed edge transferred from the linear form to the curved form by a proper operation control of each table in a device formed by successively laminating a vertically operating grinding table 41, a rotating table 42 rotated around the grinding position, a pitch table 43 intermittently moved in the horizontal direction, and a workpiece table 33 vertically moved according to the saw tooth-formed edge form.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saw blade of a replaceable blade type saw and a manufacturing apparatus thereof.

[0002]

2. Description of the Related Art In replaceable saws, the amount of laminated lumber has increased in recent years and the blades have been worn out rapidly, so the saw blade itself is a disposable piece without re-dressing, and its shape seems to be easy to machine. In addition, the sawtooth with a constant pitch is formed on the straight cutting edge with a constant shape.

A conventional automatic saw sharpening device is basically composed of a grinding section and a table section. The grinding section drives a disk-shaped rotary grindstone and the rotary grindstone to rotate, and the rotary grindstone has a predetermined inclination angle. It consists of a main body that holds the table, and the table has a table facing the rotating grindstone, and a saw plate restraining part attached to the table, so that the table can be intermittently laterally moved and moved close to or away from the grindstone corresponding to the lateral movement. Then, the saw teeth having a predetermined pitch are automatically sharpened.
Further, Japanese Patent Publication No. 59-9290 discloses a device for horizontally rotating the table in response to intermittent lateral movement, particularly as a device for changing the saw tooth sharpening angle.

[0004]

By the way, when making a cut on a flat surface, the above-mentioned hand-operated replacement blade saw cannot be used, and it is necessary to use a well-known saw. Also, by all means a saw is difficult to use for normal wood cutting.
Therefore, in addition to the normal cutting use, the present invention provides a saw blade of a new replaceable blade type saw having a straight sawtooth and a curved sawtooth so that a flat saw can be cut like a saw. It is a proposal.

Further, the above-mentioned conventional automatic dressing device is
It is designed to straighten at the same angle or to straighten at different angles, and cannot be used as it is for continuous dressing that changes from a curved shape to a straight shape. Therefore, the above-mentioned new automatic blade sharpening device for saw blades has been proposed.

[0006]

According to the saw blade of the replaceable blade type saw according to the present invention, the base portion is formed in a handle mounting shape, a predetermined saw tooth is formed on a linear saw tooth forming edge, and the forming edge tip is It is characterized in that the tip portion is formed into a gentle arc shape which approaches the back side, and the saw tooth is formed by inclining to the same cutting edge angle as the saw tooth of the straight portion or toward the base side.

Further, the automatic dressing device according to the present invention comprises a grinding mechanism having a rotary grindstone for dressing and grinding a saw, and a table mechanism for holding a workpiece and performing a grinding operation by bringing the workpiece into contact with the rotary grindstone. The table includes a grinding table for performing a grinding movement in the direction of the rotary grindstone, a rotary table provided on the grinding table so as to be horizontally rotatable around the lower end of the grinding tip of the rotary grindstone, and a rotary table. Pitch table stacked on the top so that it can be moved laterally intermittently with respect to the rotating grindstone
It is characterized in that a fixing mechanism for the workpiece is attached to the upper surface, and a workpiece table that is close to the rotary grindstone in correspondence with the lateral movement of the workpiece is provided.

[0008]

Since the tip of the saw blade jumps up in a curved shape and the sawteeth are formed corresponding to the curve, when the saw blade is attached to a predetermined handle and used, a normal straight portion is used. It is possible to cut wood, and since the handle part is located above the plane to be cut with the curved part of the tip part in contact with the plane, the cutting operation is possible. It will be possible.

The basic operation of the cutting device is to fix the saw plate to be dressed on the workpiece table and to move the grinding table in and out of the rotary grindstone in response to intermittent lateral movement of the pitch table. A predetermined saw tooth is formed on the linear edge of the saw plate by the rotating grindstone. When the intermittent lateral movement of the pitch table reaches the curved edge of the saw plate, the rotary table intermittently rotates by a predetermined angle corresponding to the intermittent lateral movement to determine the grinding bite angle of the rotary grindstone, and further to form the edge (curved Edge) is separated from the rotary grindstone, so when the workpiece table is advanced toward the rotary grindstone by the receding distance of the forming edge (distance from the extension line of the linear forming edge), the curved edge of the saw blade tip A predetermined saw tooth is sharpened, and by appropriately controlling the operation of each of the above-mentioned tables, a saw tooth ranging from a straight shape to a continuous curved shape can be automatically formed (sharpening).

[0010]

EXAMPLES Next, examples of the present invention will be described. As shown in FIG. 1, the saw blade 1 according to the present invention is used for an appropriate replaceable blade type saw, and its base portion 11 is formed in a shape corresponding to the mounting structure of the replaceable blade type saw to the handle 2. However, the lower edge (forming edge) of the saw blade 1 forming the saw tooth A is a straight line about two-thirds from the base, and the tip third is a gentle circle approaching the back side of the saw blade. It has an arc shape, and a predetermined saw tooth A is formed on the straight edge 12, and the curved edge 13 corresponds to the center of the saw tooth B, that is, the curve R, in which the tangent of the curve is regarded as a straight edge. It was formed.

Therefore, as illustrated in FIG. 2, the curved edge 13
When the object 2 is brought into contact with the object C to be cut, the handle 2 is lifted and the cutting operation is possible. The state of the sawteeth at that time is the same as the normal cutting with the sawteeth A formed on the linear edge 12. In particular, when the forming angle (saw tooth angle) of the saw tooth B of the curved edge 13 is inclined toward the base side, even if the handle 2 is further lifted, plane cutting is possible.

Next, an embodiment of an automatic dressing device for grinding the dressing of the saw blade 1 will be described. The automatic dressing device shown in the embodiment is composed of a grinding mechanism 3 having a rotary grindstone for grinding, and a table mechanism 4 for holding a workpiece 1 and applying a workpiece to the rotary grindstone to perform a grinding operation. It

The grinding mechanism 3 includes a disk-shaped rotary grindstone 31,
A motor (drive source) that rotates the rotating grindstone is installed inside, and the rotating grindstone that rotates to perform the grinding work has a predetermined facing angle (determines the sawtooth grinding angle) and inclination angle (determines the sawtooth slanting angle). Main body that can be selected and maintained (not shown)
It consists of

The table mechanism 4 includes a grinding table portion 41.
A rotary table portion 42, a pitch table portion 43,
The grinding table unit 4 is composed of the workpiece table unit 44.
1 is a rail 412 provided on the fixed portion and a grinding table 4
11 is provided so that the grinding table 411 can be ground and moved in the direction of the rotary grindstone 31 (horizontal and vertical direction), and an appropriate drive control unit 413 for controlling the operation and the operation of the grinding table 411 is additionally provided. . Further, the rotary table portion 42 is placed on the grinding table 411.

The turntable section 42 is a turntable 42.
1 is rotatably provided on the grinding table 411,
As for the rotary shaft 422, the grinding table portion 41 has the rotary grindstone 3
It is vertically installed at a position below the grinding tip of the rotary grindstone 31 when it is advanced to the first side, and the drive control unit 4 of the rotary table 421 is provided.
23 is mounted on the grinding table 411, and the rotary table 421 is intermittently rotated at a predetermined timing. Further, a horizontal horizontal rail portion 424 is formed on the upper surface to mount the pitch table portion 43.

The pitch table section 43 is a rotary table 4.
21 is composed of a pitch table 431 that performs intermittent lateral movement corresponding to the sawtooth pitch, and a drive control unit 432 that is attached to the rotary table 421 and controls the operation of the pitch table 431. The horizontal and vertical rail portions 433 are formed and the workpiece table portion 44 is placed.

The workpiece table section 44 is provided with the workpiece table 441 placed on the pitch table section 431 so as to be movable in the horizontal and vertical directions, and the workpiece table 441 is provided.
A fixing mechanism 442 for the workpiece 1 is additionally provided on the front side edge of the workpiece table 441 (opposite side of the rotary grindstone facing edge) 44.
3 corresponds to the shape of the sawtooth forming edges 12 and 13 of the workpiece 1, and the arm body 4 branched from the rotating table 421.
The fixed roller 445 provided at the tip of the 44 is attached to the side edge 443.
The workpiece table 441 is further biased to the front side edge 443 side by a spring 446 or the like.

Next, the setting process of the saw blade 1 using the setting device will be described. The saw blade 1 which is the workpiece is placed at a predetermined position of the workpiece table 441, that is, the saw tooth forming edge 12,
Grinding (dressing) is performed by fixing 13 facing the rotary grindstone 31, and basically, as in the conventional case, part of the forming edges 12, 13 is moved by the rotary grindstone 31 by the vertical movement of the grinding table 411. When the grinding is completed and the predetermined grinding is completed, the grinding table 411 retreats, the pitch table 431 moves laterally,
The advance of the grinding table is repeated alternately to form (shave) predetermined saw teeth on the forming edges 12 and 13. Specifically, first, the rotary table 421 is intermittently rotated by a predetermined angle to determine the grinding biting angle of the rotary grindstone 31, and further, the grinding position is set on the assumption of horizontal lateral movement, and the rotary table 421 is Since it rotates about the grinding position, the forming edge (curved edge) 13 is retracted as compared with the case of horizontal lateral movement. Then, since the fixed roller 445 pushes the side edge 443 toward the rotary grindstone by the retreat distance (the distance from the extension line of the straight line forming edge), the curved edge has a sawtooth angle determined by the turning angle of the turning table 421. The saw teeth B will be sequentially formed (FIG. 5). Then, when the dressing at the curved edge 13 is completed, the rotary table 421 is maintained at a constant angle, and the linear edge 12 is moved by the related operation of the pitch table 431 and the grinding table 411.
The sawteeth A are formed on.

Therefore, by appropriately controlling the operation of each table, it is possible to automatically form (shave) saw teeth from a curved shape to a continuous linear shape.

The present invention is not limited to the above-mentioned embodiment, but it is sufficient that a predetermined table performs a predetermined operation, and the concrete constitution of the driving means and the control means can be arbitrarily determined. You can

[0021]

As described above, according to the present invention, a saw blade of a replaceable blade saw in which a predetermined saw tooth is formed on a straight line forming edge and a saw tooth corresponding to a circular arc is formed by forming a straight edge of the straight line forming edge. So, along with the normal cutting work, it can also be used for saws. Further, a grinding table that operates in the vertical direction, a rotary table that horizontally rotates about the grinding position, a pitch table that intermittently moves in the horizontal direction, and a workpiece are fixed, and the sawtooth forming edge has a straight line and a curved shape. It is a dressing device that is formed by sequentially stacking adjacent workpiece tables that move in the vertical direction in accordance with the above. With a proper operation control of each table, a saw blade with a forming edge that shifts from a straight line to a curved line is formed. The saw teeth can be automatically formed at a predetermined saw tooth angle.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a saw blade according to the present invention.

FIG. 2 is an explanatory view of the same usage state.

FIG. 3 is an exploded plan view of an embodiment of the device of the present invention.

FIG. 4 is a simple side view of the embodiment.

FIG. 5 is a plan view of the use state of the same embodiment (grinding state of curved edge).

FIG. 6 is a plan view of the use state of the same embodiment (grinding state of a straight line forming edge).

[Explanation of symbols]

 1 Saw blade (workpiece) 11 Base 12 Linear forming edge 13 Curved forming edge 2 Handle 3 Grinding mechanism 31 Rotating grindstone 4 Table mechanism 41 Grinding table part 411 Grinding table 412 Rail 413 Drive control part 42 Rotating table part 421 Rotating table 422 Rotating shaft 423 Drive control section 424 Rail section 43 Pitch table section 431 Pitch table 432 Drive control section 44 Workpiece table section 441 Workpiece table 442 Fixing mechanism 443 Front side edge 444 Arm 445 Fixed roller 446 spring

Claims (2)

[Claims] 1. A base is formed in a handle mounting shape, predetermined saw teeth are formed on a linear saw tooth forming edge, and a tip of the forming edge is formed into a gentle arc shape in which a tip portion approaches a back side, and the linear shape is formed. A saw blade of a replaceable-blade type saw having a cutting edge angle similar to that of a partial saw tooth or being inclined toward the base side to form a saw tooth. 2. A grinding mechanism provided with a rotary grindstone for dressing a saw, and a table mechanism for holding a workpiece and applying the workpiece to the rotary grindstone to perform a grinding operation. A grinding table that performs grinding movement in the direction of the rotary grindstone, a rotary table that is horizontally rotatable around the lower part of the grinding tip of the rotary grindstone as an axis center on the grinding table, and a horizontal table with respect to the rotary grindstone on the rotary table. It is equipped with a pitch table stacked for intermittent movement, and a workpiece table provided with a fixing mechanism for the workpiece on the upper surface and in close proximity to the rotary grindstone for lateral movement of the workpiece. Automatic blade sharpening device of the special blade type saw.