JPS601973Y2 - knife sharpening machine - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a sharpening machine for cutting tools such as wood carving knives and chisels, and relates to a support structure for the cutting tool for the grinding machine.

Technical background of the invention and its problems Traditionally, when sharpening chisels etc. using a grinder, it was difficult for beginners to maintain the angle of the blade at a constant angle. It was necessary to make fine adjustments.

Purpose of the invention In view of the above-mentioned problems, the present invention includes a support plate that faces one side of a rotary grinder in the direction of rotation and supports the handle of the cutter, and a clamping plate that holds the handle of the cutter on the support plate. The support plate is supported on the machine stand by a coil spring so as to be movable up, down, left, right, front and back, and a support shaft is provided protruding from a ball joint supported on the machine stand so as to be able to rotate and stop. The support plate is supported on the upper end of the shaft, and the handle of the cutter is securely supported between the support plate and the clamping plate to adjust the distance of the cutter to the grinder, and the support plate supporting the cutter is moved to the rotary grinder. The angle of the cutter relative to the grinding machine can be adjusted by freely changing the angle vertically and horizontally.

Summary of the invention The invention consists of a rotary grinding machine mounted on a shaft, a support plate facing the upper side of the grinder in the direction of rotation, and a rotary grinder supported on the support plate via a spring. The support plate is supported by a pair of coil springs on the machine base, and the central part between the coil springs is supported on the machine base so that it can be rotated and stopped. The blade is fixed on a support shaft protruding from the ball joint, and the handle of the cutter is supported between the support plate and the clamping plate, and the angle of the support plate relative to the grinding machine can be arbitrarily changed by rotating the ball joint. It is something.

Examples of ideas Next, embodiments of the present invention will be described with reference to the accompanying drawings.

A grinding machine 2 is mounted on a machine stand 1, and a rotating shaft 3 of the grinding machine 2 is connected to a pulley 5, a belt 6,
The rotation is transmitted via the pulley 7.

In the grinding machine 2, a file piece 9 is attached to the circumferential surface of a wooden disc 8, and the file piece 9 can be arbitrarily replaced as needed.

A pair of support plates 10, 10 are set up on the machine base 1 with a small distance between them, facing one side of the rotation direction of the grinding machine 2, and the mounting portions 11, each of which has a bent lower end, are attached to the machine base 1. Bolt 12 on top,
It is fixed with nut 13 and warps.

Through holes 14.14 formed near the upper end of each support plate 10
The ball joint 1 is sandwiched between the support plates 10 and 10.
5 are rotatably fitted together, and a bolt 16 is inserted between the support plates 10 and 10 below the through hole 14, and the nut 1
7, and the ball joint 15 is held between the support plates 10, 10.

Furthermore, a support shaft 18 is provided to protrude above the diameter direction of the ball joint 15, and a horizontal metal plate 19 is welded and fixed to the upper end of this support shaft 18.

A support plate 20 is integrally fixed onto the metal plate 19 with screws.

The support plate 20 has a length in the left-right direction with respect to the grinding machine 2,
Several recesses 21 are formed on the top surface, into which the handle of the knife is engaged.

Further, both sides of the lower surface of the support plate 20, whose central portion is supported by the support shaft 18, are elastically supported by a coil spring 23 interposed in a guide shaft 22 set up on the machine stand 1.

The support shaft 18 and the coil spring 23 are inclined toward the lower side of the support plate 20 in the width direction to support the side farther from the grinder 2, and are attached to the lower center of the support plate 20 on the side closer to the grinder 2. A stopper 24 is provided to protrude from the machine base 1.

When the support plate 20 is tilted toward the grinder 2, the support plate 20 does not come into contact with the grinder 2.

Further, a clamping plate 25 is superimposed on the supporting plate 20, and bolts 26 and 26 are inserted through the clamping plate 25 and the supporting plate 20 at both ends in the length direction, and between the supporting plate 20 and the clamping plate 24. is the coil spring 2 inserted in the bolt 26.
7 and 27 are inserted, and the heads of the bolts 26 and 26 that protrude upward from the clamping plate 25 have rotating handles 28 and 28, respectively.
is fixed and protrudes from the bottom surface of the support plate 20) 26.
A nut 29.29 is screwed onto the lower end of 26.

Further, a friction plate 30 such as a rubber plate for preventing slipping is attached to the back surface of the clamping plate 25, and a recess 31 is formed in the upper surface of the clamping plate 25 to engage the handle of a knife.

Next, the operation of the above embodiment will be explained.

The handle a of the knife is inserted between the support plate 20 and the clamping plate 25 and engaged with the recess 21, and by rotating the handle 28, the bolt 27 tightens the clamping plate 25, and the handle a of the knife is connected to the support plate 20. It is fixed between the holding plates 25 so as not to move.

Next, the grinding machine 2 is rotated and the cutting edge is brought into contact with the grinding machine 2.

At this time, the ball joint 15 is rotated, and the support plate 20
The angle between the cutting edge and the grinding machine 2 is adjusted by tilting it in the front-back direction as shown by the chain line in Figure 1, or in the left-right direction as shown in Figure 2. Adjust so that it flies.

This confirms that the cutting edge is properly ground.

After sharpening the blade in this way, it is finished by puff polishing.

In addition, the grinding machine 2 has a file piece 8 attached to the circumferential surface of a wooden disk 9.
By replacing the adhesive as necessary, it is possible to prevent the grindstone from becoming out of shape due to repeated grinding.

Effects of the invention According to the invention, a support plate and a clamping plate supported by a spring on the support plate and tightened toward the support plate are arranged facing a rotary grinding machine mounted on a shaft on a machine stand. The support plate is supported on the machine base by a pair of coil springs, and a support shaft protruding from a ball joint is fixed to a central portion of the support plate between the coil springs, and the ball joint is fixed to the center of the support plate between the coil springs. Because it is supported on the machine stand so that it can rotate and stop freely,
By inserting the handle of the knife between the support plate and the clamping plate and tightening the clamping plate, the handle of the knife is securely held so that it will not move between the support plate and the clamping plate, and the blade will be protected against vibrations caused by contact between the grinder and the cutting edge. The handle does not move.

Also, by rotating the ball joint, the support plate fixed to it can change the vertical inclination angle in the front and back direction with respect to the grinding machine.
It is possible to arbitrarily change the vertical inclination angle in the left-right direction and maintain that state, and since the support plate is supported by a pair of coil springs, the support plate can be easily tilted, making it suitable for grinding machines. This allows you to maintain the proper position of the blade and perform proper grinding operations.

[Brief explanation of drawings]

FIG. 1 is a side view of a sharpening machine showing an example of the implementation of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a perspective view of the same. 1...Machine stand, 2...Rotary grinding machine, 15
... Ball joint, 18 ... Support shaft, 20 ... Support plate, 23 ... Coil spring, 25 ... Holding plate, 27... Spring.

Claims (1)

[Scope of utility model registration request] A rotary grinder mounted on a shaft, a support plate facing the upper side in the direction of rotation of the grinder, and a clamp supported on the support plate via a spring and tightened toward the support plate. The support plate is supported on the machine base by a pair of coil springs, and the center portion between the coil springs is provided protruding from a ball joint supported on the machine base so as to be rotatable and stopable. A knife sharpening machine characterized by being fixed on a fixed spindle.