JP3282734B2 - Circular saw correction polishing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention
The 8-blade circular saw blade with poor sharpness can be easily modified and polished to an arc-shaped blade with good sharpness, and the tangled surface of the circular saw can also be modified and polished to correct the external shape of the circular saw to a balanced shape. To an improved circular saw correction polishing machine.

[0002]

2. Description of the Related Art Conventionally, a slide base capable of adjusting the forward and backward movement of a grinder is provided, and the slide base is provided with a rotary body capable of rotating a specified range in the right and left directions around a rotation reference disk. In the bearing cylinder set up at the eccentric position, a circular saw having a plurality of saw blades and a plurality of tanning surfaces alternately provided on the peripheral edge, and a rotation guide plate provided with the same number of locking portions as the saw blades on the peripheral edge are mounted. A mounting shaft that is braked so as not to be deliberately rotated left and right by the biasing elasticity of the wound compression elastic machine. A stopper device having a locking claw to be stopped, and a rotation handle mounted on the rotating body is restricted so that the rotation blade can be set at a position where the saw blade hits the grinder, or the stopper is engaged with the locking portion at the end of the forward movement of the rotation handle. Rotating hand so that there is a gap between the pawl and the stop The rotary handle is provided with a feeder provided with a feed claw that engages with the locking portion of the rotary guide board. This circular saw polishing machine is capable of correcting and polishing a saw blade that has become unsharp while rotating the saw one frame at a time, and correcting and polishing the unbalanced circular saw with a balanced shape. Prior to the filing, it is known, for example, as described in JP-A-63-127813.

[0003]

In the conventional circular saw polishing machine, a feeder for rotating the circular saw one frame at a time is mounted on the rotary handle, or the rotary handle is rotated clockwise. Since the rotation guide plate and the circular saw mounted on the mounting shaft when rotating forward were provided with a stopper device for eccentric rotation toward the grinder under the non-rotation state, the overall configuration of the polishing machine was reduced. It becomes complicated, and it is expensive or expensive to cause a failure. In addition, the cutting edge modified by the polishing machine becomes linear, resulting in inferior durability and sharpness of the cutting edge.

[0004] In addition, the slide base is provided with an inclined shape mounted on the lower part on both sides of the slide base so that the slide base can slide forward and backward along two inclined guide rails provided on the mounting base. Since the sliding piece is fitted on the inclined guide rail, cutting dust and the like generated in the regrinding work enter the inclined guide rail between the sliding surfaces of the sliding piece and the sliding table. There is a problem that the back-and-forth movement is not smooth.

According to the present invention, the arc guide operation of the cutting restricting device provided on the slide table can be performed without using any stopper device or feed device, or without moving the slide table in the front-rear direction. By the braking operation of the compression elastic machine wound on the mounting shaft, the cutting edge of the saw blade is made strong and sharp in the forward movement of the handle, and the outer shape of the circular saw is balanced by the return operation of the handle. It is a simple and inexpensive round that is easy to operate and that the slide table can be prevented from moving smoothly due to cutting dust etc. It is intended to provide a saw correction polishing machine.

[0006]

In order to achieve the above object, a circular saw correcting and polishing machine according to the present invention is provided with a guide formed on a mounting table for a grinder installed at a fixed inclination angle.
Provide a slide table that can be adjusted to move back and forth by being inserted into the long hole ,
The sliding table is provided with a rotating body that can rotate a predetermined range in the left and right direction by a reciprocating rotation operation of a handle around a rotation reference disk,
A circular saw having eight saw blades alternately provided on the peripheral edge of a bearing cylinder provided upright at an eccentric position of the rotating body, and a rotation guide plate provided with the same number of locking portions as the saw blades on the peripheral edge. Are mounted, and the mounting shaft is braked so as not to be rotated left and right by the biasing elastic force of the wound compression elastic machine. When the handle is moving forward, it is engaged with the rotating part of the upright guide piece by the urging machine.
With the brake based on the pressure contact of the circular saw, the circular saw is moved forward while guiding it in an arc by the length of the blade edge of the saw blade in the non-rotating state while cutting in a non-rotated state, and the blade edge of the saw blade is cut in an arc shape, and When the circular saw is pressed against the grinder while moving, it is rotated backward in the same direction as the handle in the reverse direction by the circular saw length to continuously cut the circular saw. A regulating device is provided.

The cutting restricting device has a support shaft erected on the slide table, one end of which is engaged with the slide table, a central portion wound around the support shaft, and the other end pivoted on the upper end of the support shaft. It is constituted by a biasing ammunition attached to a guide body provided with an upright guide piece which is provided on one side and which is engaged with a locking portion of the rotary guide board.

A pair of moving guide plates formed by extending the lower ends of the left and right side walls of the slide base downward are fitted into a pair of guide slots formed in the mounting base in parallel in the front-rear direction. The lower end of the movable guide plate fitted into the mounting base is bent in a direction intersecting with the elongated guide hole.

[0009]

[Effect] The cutting edge of the circular saw is worn by cutting work of grass, stem culm or other crops, and the saw blade and the outer shape of the circular saw whose sharpness is remarkably reduced become unbalanced. When the circular saw is to be modified and polished to be used again, the slide table 5 is first retracted along the two guide slots 6 and 6 formed in the mounting table 1 so as to move away from the grinder 3, and then the handle 16 Is locked by the hook 36 of the blade positioning device 34 provided on the slide 5 as shown at the position A 'in FIG. And, in this state, the mounting shaft 1
7, the circular saw 24 having eight blades is set so that the cutting edge 25a of the circular saw 24 and one of the engaging portions 22 provided at eight locations on the outer periphery of the rotary guide board 21 coincide with each other. Attach with. Then, the eight locking portions 22 provided on the rotation guide board 21
In one of the cases, is it possible that the upright guide piece 32 of the cutting control device 29 is locked at a distance L corresponding to the polishing allowance,
The saw blade 2 is also provided between the handle 16 and the blade positioning device 34.
An interval L corresponding to 5 polishing allowances is automatically provided.

Therefore, in this state, the cutting restricting device 2
9, the handle 16 is rotated from the A ′ position to the A position until the upright guide piece 32 provided on the next engagement portion 22 engages with the next locking portion 22. After moving the handle 16 forward to a position where the outer peripheral edge of the grinder 3 is in contact with the outer peripheral edge of the grinder 3, the handle 16 is moved from the position A to the blade positioning device 34.
Is rotated forward to the A ″ position where it abuts.

Then, the mounting shaft 17 mounted on the eccentric position of the rotating body 11 is rotationally moved from the position B to the position B ', and the rotation guide plate 21 and the circular saw 24 mounted on the mounting shaft 17 are also moved. Due to the braking action of the compression elastic machine 20 wound around the mounting shaft 17, the position C 'and the position D
The grinder 3 is moved forward with respect to the grinder 3 by the length of the cutting edge of the saw blade 25 so as to be at the position D 'from the position.

By the way, the rotation guide board 21 is connected to the handle 16.
During the forward rotation operation, the saw blade 25 is advanced toward the grinder 3 from the C position to the C 'position in the non-rotation state by the cutting edge length of the saw blade 25. The upright guiding piece 32 of the cutting restricting device 29 locked in the portion 22 rotates clockwise around the support shaft 30 against the elasticity of the urging ram 33 in a state of sliding contact with the locking portion 22. So that
The rotating guide board 21 is moved forward toward the grinder 3 while being guided in a slightly arcuate shape in the counterclockwise direction by the sliding contact with the standing guide piece 32 with the forward movement. Accordingly, the saw blade 25 of the circular saw 24 mounted on the mounting shaft 17 together with the rotation guide plate 21 is also cut in an arc by the length of the cutting edge by the above operation, and an arc-shaped saw blade 25 having excellent durability and excellent sharpness is obtained. can get.

Next, when the handle 16 is rotated backward in the counterclockwise direction from the position A "to the position A, the rotating guide board 21 is forcibly forced by the braking action of the compression elastic machine 20 wound around the mounting shaft 17. From the position E to the position E ', the circular saw is sequentially rotated counterclockwise by one frame, and the mounting shaft 17 is sequentially moved backward from the position B' toward the position B. Meanwhile, the circular saw 24 is also mounted on the mounting shaft. The saw blade 25 is rotated backward in the counterclockwise direction from the position F to the position F 'at the tip of the next saw blade 25 with respect to the grinder 3 by using the circular saw 24 as an axis. Is finished at the cutting edge position of the saw blade 25, so that when the handle 16 is rotated backward from the A ″ position to the A position, the grinder 3 is brought into contact with the smooth surface 26 of the circular saw 24. Because they are in sliding contact,
As it is turned counterclockwise, the tanning surface 26
To correct the shape into the correct shape.

As described above, when the reciprocating rotation operation of the handle 16 completes the correction cutting work of one saw blade 25 and one tanning surface 26, thereafter, the saw blade 25 and the tanning surface 26 are formed in the same manner as described above. If the handle 16 is sequentially reciprocated by a number (eight in this embodiment), the saw blade 25 can be cut in an arc shape, and the tanning surface 26 can be finished in a well-balanced shape.

[0015]

An embodiment will be described with reference to the drawings. 1 to 8, reference numeral 1 denotes a mounting base having a bottomless housing that can be installed at an arbitrary location, and a grinder 3 having a cutting angle selected to 45 degrees on a front side of the mounting base 1. Is mounted via a mounting device 4 erected on the mounting table 1. The grinder 3 is placed on the mounting table 1 at a position facing the mounting device 4.
Slide 5 that can move freely in the front-back direction with respect to
Is provided. The slide table 5 is configured as follows in order to prevent the front-rear movement from being uneven due to the cutting dust generated during the cutting and polishing work. That is, on the mounting table 1, two guide slots 6 are drilled in parallel along the direction of the grinder 3 at intervals, and the lower ends of the left and right side walls of the slide table 5 are formed to extend downward. The pair of left and right moving guide plates 7, 7 are
After being fitted into the mounting table 1, the lower ends of the moving guide plates 7, 7 fitted into the mounting table 1 are bent 8, 8 in a direction intersecting the guide slots 6, 6, and the slide table 5 is guided. The holes 6 and 6 do not come off. On the slide table 5, a cylindrical rotation reference disk 9 having an upright peripheral wall 10 is formed so as to bulge upward, and the upper part of the rotation reference disk 9 has a shape similar to the rotation reference disk 9 as a whole. The flanged rotating body 11 is fitted and connected under a state of being crowned along the peripheral wall 10 from above. At the left and right symmetrical positions on the upper surface of the rotation reference disk 9, arc-shaped long holes 12, 12 for concentrically rotating the rotating body 11 along the peripheral wall 10 by a predetermined angle are respectively formed. Connection holes 13, 13 that match the arc-shaped long holes 12, 12 are drilled at symmetrical positions on the upper surface of the rotating body 11 on the fitting side, and penetrated through the arc-shaped long holes 12, 12 and the connection holes 13, 13. Both are connected by the connecting tools 14 and 14. A bearing cylinder 15 is erected at an eccentric position of the rotating body 11, and one end of a handle 16 is attached to the rotating body 11. A mounting shaft 17 is mounted on the bearing cylinder 15 so that the mounting shaft 17 can freely move.
A washer 19b is provided at the lower end of the mounting shaft 17 mounted on the shaft 5.
The compression elastic machine 20 is mounted on the mounting shaft 17 between the anti-seizure washer 19a and the flat washer 19b through which the mounting shaft 17 is inserted so as to come into contact with the inner surface of the recess of the bearing sleeve 15 by screwing in the tension bolt 18 provided with the screw. Then, the mounting shaft 17 is strongly braked so as not to be unnecessarily rotated left and right by the biasing elasticity. In addition, the lower end of the tension bolt 18 is extended into the slide table 5 so that a compression elastic machine 20 having a large elasticity can be used. On the mounting shaft 17 suspended under the above-mentioned condition, a disk-shaped rotating guide plate 21 having eight locking portions 22 provided evenly around its periphery is integrally welded. The same number of saw blades 2 as the number of locking portions 22 of the rotation guide board 21 are provided on the upper surface of the rotation guide board 21 via an elastic seat plate 23 on the periphery.
5 and a circular saw 24 provided alternately with a tanning surface 26 are removably inserted into and mounted on the mounting shaft 17, and this is screwed into the distal end side of the mounting shaft 17 via a clamping plate 27 fitted on the mounting shaft 17. It is firmly attached by the fitted tensioner 28. Reference numeral 29 denotes a cutting restricting device disposed on the slide table 5 near the rotation guide board 21. The cutting restricting device 29 includes a support shaft 30 erected on the slide table 5 and one end thereof. The stand is engaged with the slide table 5, the central portion is wound around the support shaft 30, the other end is pivotally attached to the upper end of the support shaft 30, and the one end is engaged with the locking portion 22 of the rotation guide board 21. And a biasing arm 33 engaged with the guide body 31 provided with a guide member 32 in a shape of a circle. Press against Reference numeral 34 denotes a blade positioning device for restricting the rotation range of the handle 16 having the base end side mounted on the rotating body 11, and the blade positioning device 34 is a mounting bracket 35 standing upright on the slide table 5. And a hook 36 into which the handle 16 is fitted and locked is pivotally attached to the bent piece of
When the handle 16 is engaged with the hook 36, the handle 16 can be set at the position A 'where the saw blade 25 of the circular saw 24 hits the grinder 3, and when the hook 36 is disengaged, the handle 16 is released. Movement and rotation can be performed as stopped at the position A "clockwise from the position A ', so that an interval L corresponding to the polishing allowance of the saw blade 25 is formed between the position A' and the position A". . Therefore, when the handle 16 is set at the position A ', a gap L corresponding to the polishing allowance is formed between the locking portion 22 of the rotary guide board 21 and the guide piece 32 of the cutting restricting device 29. Of course. Reference numeral 37 denotes a handle 38 which allows the slide base 5 to be freely moved back and forth by a desired length with respect to the grinder 3.
The rotating screw 37 is a bearing plate having a distal end screwed into a screw nut 39 mounted inside the slide 5 and a base end standing upright on the mounting base 1. 4
It is mounted on zero. A is a return rotation end position of the handle 16, A ′ is a mounting position of the saw blade 24 and the rotation guide board 21, and A ″ is a position where the handle 16 is removed from the hook 36 of the blade positioning device 34 and the position is A ′. Further, the polishing allowance position of the saw blade 25 when the rotation is slightly shifted clockwise, B and B 'are the axial center movement position of the mounting shaft 17,
C and C 'are the moving positions of the rotary guide plate 21 when the handle 16 is rotated forward from the position A to the position A ";
D, D 'are the moving positions of the circular saw 24 when the handle 16 is rotated forward from the A position to the A "position,
E ′ is the rotational position of the rotary guide board 21 when the handle 16 is rotated from the A ″ position to the A position, and F and F ′ are
This is the rotation position of the circular saw 24 when the handle 16 is rotated from the A ″ position to the A position.

[0016]

Since the present invention is configured as described above, it has the following effects. Since a circular saw with eight saw blades alternately provided on the periphery and a rotating guide board with the same number of locking parts were mounted on a mounting shaft that was forcibly braked by a compression ram, even a stopper was used. Even if no device and feeder are provided, the circular saw and the rotary guide board are moved forward by the length of the saw blade with respect to the grinder in the non-rotated state only by reciprocating the handle eight times. In the state of squeezing or pressing against the grinder, the blade is rotated backward by the length of the tanning surface, so that the cutting operation of the saw blade and the correcting operation of the tanning surface can be performed continuously and efficiently. Since a cutting restricting device engaged with the locking portion of the rotation guide board is provided on the base, when performing the correction cutting of the saw blade on the grinder by the forward operation of the handle, the cutting in the non-rotation state Will move forward by the length of the blade edge of the saw blade The cutting edge of the circular saw is moved forward while guiding it in an arc shape by the cutting control device, and it is cut in an arc shape by the length of the cutting edge of the saw blade. It is possible to provide a simpler and cheaper arrangement of the device that can be obtained. In addition, the cutting control device has a support shaft erected on the slide table, one end of which is engaged with the drive table, the center portion is wound around the support shaft, and the other end is pivotally mounted on the upper end of the support shaft, It is composed of a biasing ammunition attached to a guide body provided with an upright guide piece that engages with a locking portion of the rotation guide board on one side, so that the handle is not rotated by the forward operation of the handle with respect to the grinder The cutting edge of the saw blade which has been moved forward is guided so as to be surely formed into an arc shape by the upright guiding piece which is rotated while being in sliding contact with the locking portion, so that the arc-shaped saw blade can be cut. Further, in the present invention, the pair of moving guide plates formed by extending the lower ends of the left and right side walls of the slide base downward are respectively fitted into a pair of guide slots formed in the mounting base in parallel in the front-rear direction. At the same time, the lower end of the moving guide plate fitted into the mounting base was bent in a direction crossing the guide slot, so the front and rear movements of the slide base were not smooth due to the ingress of cutting dust generated during the correction cutting work. Can be prevented beforehand, and it is possible to always adjust the movement lightly, or it is possible to prevent the slide from being pulled out from the mount, so that the correction cutting operation can be performed for a long time.

[Brief description of the drawings]

FIG. 1 is a side view of a circular saw correction polishing machine with a part cut away.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view in which a part of a main part is cut away.

FIG. 4 is an explanatory diagram of the operation when the handle is rotated forward.

FIG. 5 is an explanatory diagram of an operation when the handle is rotated forward.

FIG. 6 is a plan view of a rotation reference disk.

FIG. 7 is a plan view of a rotating body.

FIG. 8 is an enlarged plan view of a saw blade partially cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting stand 3 Grinder 5 Sliding stand 6,6 Guide long hole 7,7 Moving guide plate 8,8 Bending 9 Rotation reference disk 11 Rotating body 15 Bearing cylinder 16 Handle 17 Mounting shaft 20 Compressor 21 Rotation guide Board 22 Locking part 24 Circular saw 25 Saw blade 25a Blade edge 26 Tanning surface 29 Cutting restricting device 30 Support shaft 31 Guide 32 Upright guide piece 33 Biasing machine

Continuation of the front page (56) References JP-A-63-127813 (JP, A) JP-B2-1611 (JP, B2) JP-B63-22942 (JP, B2) JP-B2-25730 (JP, B2) , B2) Jikken Sho 60-4649 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B23D 63/14

Claims (3)

(57) [Claims] 1. A sliding table, which is fitted into a guide slot formed on a mounting table and is capable of adjusting a forward and backward movement with respect to a grinder installed at a fixed inclination angle, wherein said sliding table is provided. Is provided with a rotating body which can be rotated in a predetermined range in the left and right direction by a reciprocating rotation operation of a handle around a rotation reference disk, and a saw cylinder is connected to a peripheral edge of a bearing cylinder which is erected at an eccentric position of the rotating body. A circular saw with eight surfaces alternately provided and a rotating guide plate with the same number of locking parts on the periphery as the saw blades are attached to each other. and Jikuka the mounting shaft which allowed braking so as not to be rotated, the on sliding block, while being engaged with the engaging portion of the rotation guide plate, standing upon forward movement of the handle
The circular saw is moved in a non-rotating state while being guided in an arc by the length of the blade edge of the saw blade in a non-rotating state by the control based on the pressing contact of the guide piece with the rotating guide plate by the urging machine. Move it to cut the blade edge of the saw blade in an arc shape, and when moving the handle back, press the circular saw's flat surface against the grinder and direct it in the same direction as the handle's return direction by the length of the circular saw's flat surface. A circular saw correcting and polishing machine characterized by having a cutting restricting device for rotating backward so as to continuously cut the circular surface of the circular saw. 2. A cutting restricting device, comprising: a support shaft erected on a slide table, one end of which is engaged with the slide table, a center portion wound around the support shaft, and the other end pivoted on the upper end of the support shaft. 2. An urging machine attached to a guide body provided with an upright guiding piece provided on one side and engaging with a locking portion of a rotary guide board.
Circular saw correction polishing machine as described. 3. A pair of moving guide plates formed by extending the lower ends of the left and right side walls of the slide base downward, respectively, are fitted into a pair of guide slots formed in the mounting base in parallel in the front-rear direction. 2. The circular saw correcting and polishing machine according to claim 1, wherein the lower end of the moving guide plate fitted into the mounting base is bent in a direction intersecting the guide slot.