JP6228990B2 - Sharpener - Google Patents

Description

The present invention relates to a sharpening machine for performing sharpening work such as a blade of a diamond cutter.

When a cutting tool used for a cutting tool (such as a blade of a diamond cutter) is repeatedly used, the cutting edge of the cutting tool or particles constituting the tool are gradually worn or clogged to obtain a desired cutting performance. It becomes difficult. In such a case, a sharpening operation is performed to improve the cutting performance again.

For example, when sharpening a diamond cutter blade (cutting tool), an operation of cutting a concrete block, a brick, or the like using a blade to be sharpened is performed. Further, as a dedicated sharpener used for performing such work, for example, Patent Document 1 describes. In the sharpening machine described in Patent Document 1, a cylindrical member whose surface is processed so as to be optimal for the sharpening work is provided so as to be rotatable around its central axis.

Various types of sharpening machines are used depending on the type, material, and shape of the sharpening tool.

Japanese Patent Laid-Open No. 9-216159

Conventional sharpeners such as the sharpener described in Patent Document 1 are large in size, and are usually installed and fixed at specific locations. For this reason, each time the dressing work is performed, the operator carries the blade tool to be sharpened or a cutter using the blade tool to this place, and the sharpening work is performed here. For this reason, work efficiency deteriorated.

For this reason, a small dressing machine that can be carried by an operator is desired. However, as described above, the dressing work is performed by bringing a rotating blade tool and a grindstone into contact with each other. It was difficult to ensure safety.

That is, there has been a demand for a small-sized sharpening machine that allows a worker to safely perform sharpening work.

The present invention has been made in view of such problems, and an object thereof is to provide an invention that solves the above problems.

In order to solve the above problems, the present invention has the following configurations .
A sharpening machine according to the present invention is a sharpening machine for performing sharpening work of the cutting tool by rubbing the cutting tool with a grindstone, and a housing provided with the grindstone mounted on a rotating shaft rotatably installed A cover that is mounted on the upper side of the casing so as to cover the side of the casing on which the grindstone is installed, and that has a slit that exposes a part of the grindstone on a surface in a direction intersecting the rotation axis ; And a braking mechanism for braking the rotational movement of the rotating shaft, or a driving mechanism for rotating the rotating shaft .
A sharpening machine according to the present invention is a sharpening machine for performing sharpening work of the cutting tool by rubbing the cutting tool with a grindstone, and a housing provided with the grindstone mounted on a rotating shaft rotatably installed A cover that is mounted on the upper side of the casing so as to cover a side of the casing on which the grindstone is installed, and that has a slit that exposes a part of the grindstone. A braking mechanism for braking movement or a driving mechanism for rotating the rotating shaft is provided , and a protective cover locking portion is provided on the surface of the cover on one side in the longitudinal direction of the slit. To do .
In the dressing machine according to the present invention, the protective cover locking portion includes a concave portion .
The dressing machine of the present invention is characterized in that a plurality of the concave portions are formed along the longitudinal direction of the slit in the protective cover locking portion .
A sharpening machine according to the present invention is a sharpening machine for performing sharpening work of the cutting tool by rubbing the cutting tool with a grindstone, and a housing provided with the grindstone mounted on a rotating shaft rotatably installed A cover that is mounted on the upper side of the casing so as to cover a side of the casing on which the grindstone is installed, and that has a slit that exposes a part of the grindstone. A brake mechanism for braking movement, or a drive mechanism for rotating the rotating shaft, and the cover on one side in the longitudinal direction of the slit is on each side of the slit in a direction perpendicular to the longitudinal direction. A protective cover holding part protruding from the surface of the cover is provided .
The dressing machine of the present invention is characterized in that the attachment positions of the two protective cover holding portions in the direction perpendicular to the longitudinal direction with respect to the cover are variable .
A sharpening machine according to the present invention is a sharpening machine for performing sharpening work of the cutting tool by rubbing the cutting tool with a grindstone, and a housing provided with the grindstone mounted on a rotating shaft rotatably installed A cover that is mounted on the upper side of the casing so as to cover a side of the casing on which the grindstone is installed, and that has a slit that exposes a part of the grindstone. Provided with a braking mechanism for braking movement or a driving mechanism for rotating the rotating shaft , fixed to the casing or the cover, and grounded at a position away from the casing when the casing is installed on the ground It is characterized by comprising a stand .
The dressing machine of the present invention is characterized in that the mounting position of the cover with respect to the casing in a direction intersecting with the longitudinal direction of the slit is variable.
In the dressing machine of the present invention, the rotating shaft is installed substantially parallel to a surface of the cover where the slit is formed.
The sharpening machine of the present invention is characterized in that the grindstone has a disc shape.
The dressing machine of the present invention includes the braking mechanism, and the braking mechanism transmits the rotational motion of the rotary shaft to a clutch drum fixed to the casing as the rotational speed of the rotary shaft increases. The centrifugal clutch is provided.
The dressing machine of the present invention comprises the drive mechanism, and the drive mechanism rotates the rotating shaft by a motor.
The dressing machine of the present invention includes the drive mechanism, and the drive mechanism includes a power transmission shaft that transmits rotational motion from the outside and transmits power to the rotation shaft.
In the dressing machine of the present invention, the power transmission shaft and the rotation shaft are parallel to each other .

Since the present invention is configured as described above, it is possible to obtain a small dressing machine that allows the worker to perform the dressing work safely.

They are a left side view (a), a top view (b), a right side view (c), and a front view (d) of a dressing machine according to an embodiment of the present invention. It is sectional drawing of the dressing machine used as embodiment of this invention. It is a top view which shows the structure of the braking mechanism used in the dressing machine used as embodiment of this invention. It is a figure which shows the outline of the external appearance of a standard cutter. It is FIG. (1) which shows the form in the case of the dressing operation | work using the dressing machine which becomes embodiment of this invention. It is an enlarged view around the protective cover locking part in the form in the case of the dressing work using the dressing machine which becomes embodiment of this invention. It is FIG. (2) which shows the form in the case of the dressing operation | work using the dressing machine which becomes embodiment of this invention. It is a figure which shows the condition of the protective cover holding | maintenance part in the case of the dressing operation | work using the dressing machine used as embodiment of this invention. It is the top view (a), sectional drawing (b), and perspective drawing (c) of the modification of the dressing machine used as embodiment of this invention.

The configuration of the dressing machine according to the embodiment of the present invention will be described. FIG. 1 shows a left side view (a), a top view (b), a right side view (c), and a front view (d) of the dressing machine 1. In this sharpening machine 1, a stand 90 is provided. However, for convenience, the entire stand 90 is described only in a top view (b). The stand 90 is shown in both side views (a, c). Only a part is described, and the description is omitted in the front view (d). Here, the top view means a view seen from above in the vertical direction when the sharpening machine 1 is actually installed and used, but the left and right side surfaces and the front surface are set for convenience. Directions are described accordingly.

In the dressing machine 1, a structure in which a disc-shaped grindstone 10 is mounted on a rotary shaft 11 along the vertical direction is provided in a housing 12. Since the grindstone 10 is a consumable item, the grindstone 10 is attached to the rotary shaft 11 using a grindstone fixing nut (not shown) so that the grindstone 10 can be attached to and detached from the rotary shaft 11. With the grindstone 10 mounted on the rotary shaft 11, a cover 13 is mounted on the housing 12 from above. The direction in which the blade 103 attached to the cutter 100 is rotated is the direction indicated by the arrow in FIG. The rotating shaft 11 (grindstone 10) is also rotated in the direction indicated by the arrow in the same manner.

As shown in FIG. 1 (b), a slit 131 that is elongated in the front-rear direction is provided on the upper left side of the cover 1 in the figure, and when viewed from above, the slit 131 is located on the left side of the rotating shaft 11 of the grindstone 10. The part is exposed. Further, the cover 13 is fixed to the housing 12 in a state where the cover mounting screw 132 passes through the cover mounting hole 133 formed in the cover 13. At this time, since the cover attachment hole 133 is formed to be elongated in the left-right direction in the figure, the attachment position of the cover 13 to the housing 12 in the left-right direction in the figure can be adjusted. For this reason, the position of the slit 131 with respect to the grindstone 10 in the left-right direction (direction intersecting the longitudinal direction) in FIG. 1 can be adjusted, and the region of the grindstone 10 immediately below the slit 131 can be adjusted.

Further, on the front side of the slit 131 on the upper surface of the cover 13 (one side in the longitudinal direction), a protective cover locking portion 14 whose surface shape is saw-shaped toward the upper side is provided. The protective cover locking portion 14 is formed in a saw shape, and thus has a plurality of concave portions along the longitudinal direction of the slit 131. On the left and right sides of the cutter cover locking portion 13, there are provided partition-like protective cover holding portions 15 (left protective cover holding portion 151, right protective cover holding portion 152) that protrude upward and expand in the vertical direction and the front-rear direction. Yes.

FIG. 2 is a vertical sectional view including the rotating shaft 11 and the cover mounting screw 132 in the dressing machine 1. In FIG. 2, the internal mechanism of the dresser 1 is mainly shown. The rotating shaft 11 is supported by a bearing 16 at the top of the housing 12 and protrudes above the housing 12. The grindstone 10 is mounted on the rotating shaft 11 protruding upward, and the grindstone fixing nut 111 is further mounted on the rotating shaft 11, whereby the grindstone 10 is fixed to the rotating shaft 11. Further, a cover fixing portion 17 to which a cover mounting screw 132 is fixed is also provided on the upper side of the housing 12 so as to protrude upward. As described above, the position of the cover 13 in the left-right direction in the drawing on the upper side of the housing 12 can be adjusted.

The rotating shaft 11 is supported by a bearing 16 and is connected to the braking mechanism 20 on the lower side thereof. A centrifugal clutch mechanism is used as the braking mechanism 20. FIG. 3 is a top view of only the structure of the braking mechanism 20. In the braking mechanism 20, a centrifugal clutch 21 is fixed to the rotating shaft 11. In the centrifugal clutch 21, two clutch weights 22 are mounted symmetrically around the center of the rotary shaft 11 so that each of the two clutch weights 22 can rotate around the clutch weight shaft 23. The two clutch weights 22 are housed inside a cylindrical clutch drum 25 that is coaxial with the rotary shaft 11 while being connected by a clutch spring 24. When the clutch spring 24 is contracted, the two clutch weights 22 do not contact the inner peripheral surface of the clutch drum 25. The clutch drum 25 is fixed to the housing 12 or a part of the housing 12 is processed as the clutch drum 25.

When the rotary shaft 11 (grinding stone 10) is stopped, as described above, the clutch weight 22 and the inner peripheral surface of the clutch drum 25 are not in contact with each other, but when the rotational speed of the rotary shaft 11 increases, the clutch weight A centrifugal force is applied to 22. Due to the centrifugal force, the two clutch weights 22 are rotated around the clutch weight shaft 23 against the elastic force of the clutch spring 24 and are spread. Thus, the clutch weight 22 (centrifugal clutch 21) is in contact with the inner peripheral surface of the clutch drum 25. A generally known centrifugal clutch mechanism is used for on / off control of transmission of rotational power. In this case, since the clutch drum 25 is fixed to the housing 12, the clutch weight 22 is connected to the clutch drum 25. This rotational motion is transmitted to the housing 12 by contacting the inner peripheral surface. For this reason, if the housing | casing 12 is being fixed, the braking effect | action with respect to the rotating shaft 11 will generate | occur | produce. That is, when the rotating shaft 11 is driven by an external force, the rotating shaft 11 is automatically braked (decelerated) by the braking mechanism 20. However, when the rotational speed of the rotating shaft 11 decreases, the clutch weight 22 (centrifugal clutch 21) is closed by the clutch spring 24, so that the clutch weight 22 and the clutch drum 25 are not in contact with each other. For this reason, when the rotating shaft 11 is driven, it is decelerated, but it is not stopped.

As shown in FIGS. 1B and 1D, the right protective cover holding portion 152 is fixed to a right protective cover holding portion base 154 formed from the upper surface side of the cover 13 to the front surface. . The left protective cover holding portion 151 is also formed so as to pass along the surface from the upper surface side to the front surface side of the cover 13 and pass below the right protective cover holding portion base 154 on the front surface side. Fixed to the base 153. The left-side protective cover holding base 153 and the right-side protective cover holding base 154 can be adjusted with respect to the upper surface of the cover 13 by the protective cover holding base mounting screws 155 in the left-right direction. It is installed as such.

Further, as shown in FIG. 1B, a stand 90 spreading forward is attached to the dresser 1 by left and right stand mounting screws 91 of the housing 12. The front end portion of the stand 90 is shaped so as to be grounded at a position away from the housing 12 or the cover 13 when the dresser 1 is grounded to the ground. For this reason, when using this sharpening machine 1, an operator can step on the front end portion of this stand 90 with his / her foot, thereby fixing the sharpening machine 1 to the ground. An operator can hold the stand 90 when the sharpener 1 is carried. The stand 90 can be rotated in the vertical direction around the stand attachment screw 91, and can be made compact as a whole when the dressing machine 1 is carried. Note that the stand 90 may be attached to the cover 13.

Next, the form at the time of performing dressing work using this dressing machine 1 is demonstrated. In the sharpening machine 1, for example, a cutting tool (blade) of a diamond cutter is sharpened. This operation is performed by rotating the blade of a diamond cutter in the same manner as in normal use and bringing the blade into contact with (grinding) the grindstone 10. Thereby, a cutting tool is conspicuous.

FIG. 4 is a diagram showing an outline of the appearance of a standard cutter, which is also referred to as a disc grinder, as an electric tool to be used here. In this cutter 100, a disk-shaped blade 103 fixed to the drive shaft 102 at the tip of the main body 101 is rotated by a motor built in the main body 101, and this blade 103 is brought into contact with the sample 200 to be cut. Thus, the sample 200 to be cut is cut. Here, in order to suppress scattering of dust over a wide area, a protective cover 104 is provided on the operator side around the cutting tool 103, and cutting work is performed at a place where the cutting tool 103 is not covered with the protective cover 104. Is done. Further, the rotation direction of the blade 103 is the direction indicated by the arrow in the drawing.

FIGS. 5A to 5C are views showing a form when the sharpening machine 1 is used to sharpen the blade 103 (cutter 100), which corresponds to the right side view in FIG. . In FIG. 5, (a) to (c) sequentially show forms according to the progress of work.

First, as shown in FIG. 5A, the operator places the sharpening machine 1 on the ground G and steps on the stand 90 to perform the normal cutting operation in the same manner as when performing a normal cutting operation. Is disposed at the position of the slit 131 in a state of being inclined forward in FIG. At this time, the lower end portion of the protective cover 104 in the drawing can be locked in the concave portion of the protective cover locking portion 14. FIG. 6 is an enlarged view of a broken line portion in FIG. As shown in FIG. 6, the lower end portion of the protective cover 104 is engaged with one of the concave portions that become a saw-shaped valley portion in the cutter cover engaging portion 14, whereby the lower end portion of the protective cover 104 is engaged. , 6 can be fixed in the left-right direction (front-rear direction in FIG. 1).

Further, the protective cover 104 (cutter 100) is fixed in the left-right direction in FIG. 1 by sandwiching the protective cover 104 between the protective cover holding portions 15 (left protective cover holding portion 151, right protective cover holding portion 152) in FIG. be able to. For this reason, the cutter 100 is supported by the dressing machine 1 on the front side of the slit 131 in FIG.

In this state, as shown in FIGS. 5 (b) and 5 (c), the operator uses the lower end portion of the supported protective cover 104 as an axis so that the lower end portion of the blade 103 moves downward. 100 can be rotated downward. As a result, the cutting tool 103 descends, comes into contact with the grindstone 10 through the slit 131, and the grindstone 10 can be cut as shown in FIG. Thereby, the cutting tool 103 is sharpened.

In the sharpening operation, the grindstone 10 needs to be cut (slid together) by the cutting tool 103. For this purpose, it is necessary that a speed difference exists between the cutting tool 103 and the grindstone 10 where they contact each other. For this reason, for example, when the rotary shaft 11 is rotatable, the sharpening work is difficult. Moreover, it is preferable that the rotational speed (rotation speed) difference between the cutting tool 103 and the grindstone 10 at this time shall be 1000 rpm or more. Furthermore, in order to increase the efficiency of sharpening, it is preferable that the portion of the grindstone 10 that contacts the cutting tool 103 moves without being fixed to a specific portion. That is, in the above configuration, it is preferable that there is a large rotational speed difference between the cutting tool 103 and the grindstone 10 and the grindstone 10 is rotating.

In the sharpening machine 1, the rotating shaft 11 (grinding stone 10) in the sharpening machine 1 rotates in the direction of the arrow in FIG. 1 when the grinding stone 10 and the cutting tool 103 are in contact with each other. Here, the rotational motion of the blade 103 is driven by a motor in the cutter 100, and the braking mechanism 20 is mounted on the rotary shaft 11. The clutch drum 25 to which this rotational motion is transmitted in the braking mechanism 20 is fixed to the housing 12. The casing 12 is installed on the ground G, and the casing 90 is fixed by a stand 90 being stepped on by an operator. For this reason, the braking mechanism 20 functions and the grindstone 10 is decelerated, and the rotational speed of the grindstone 10 is set to be lower than the rotational speed of the blade 103 in contact therewith. Thereby, a rotational speed difference arises between both, and the grindstone 10 can be cut | disconnected with the cutting tool 103. FIG. At this time, since the rotation is not stopped by the braking mechanism 20, the rotational speed of the grindstone 10 does not become zero. For this reason, the location where the blade 103 in the grindstone 10 contacts continues to move on the circumference. For this reason, the dressing work can be efficiently performed using the dressing machine 1 described above.

As described above, most of the upper surface side of the dressing machine 1 is covered with the cover 13, so that dust can be prevented from scattering around the dressing operation. Moreover, since the periphery of the grindstone 10 is covered with the cover 13 except for the slit 131, the dust is also prevented from being scattered outside. For this reason, it is preferable not to increase the width of the slit 131 more than necessary.

However, during this operation, the cutter 100 is fixed to the dressing machine 1 at the lower end of the protective cover 104 in FIG. 5, and a small angle range in the left-right direction in FIG. 1 (b: top view) centering on this fixed location. It becomes movable. Correspondingly, as shown in FIG. 1B, the width of the slit 131 is increased from the front to the rear. Accordingly, it is possible to finely adjust the angle of the cutting tool 103 viewed from the upper surface to perform the sharpening work. At this time, the width of the slit 131 on the front side is preferably narrow.

By the sharpening operation, the grindstone 10 is partially cut. By repeating the sharpening operation, the grindstone 10 is cut from the outer periphery, and its outer diameter gradually decreases. When the grindstone 10 becomes small, the grindstone 10 may not exist immediately below the slit 131. For this reason, in FIG. 1, the attachment position of the cover 13 with respect to the housing 12 is variable in the left-right direction, the cover 13 is adjusted by adjusting the position of the cover 13 so that the grindstone 10 exists immediately below the slit 131. The cover 13 can be fixed using screws 132. When the grindstone 10 is reduced to such an extent that the sharpening work can no longer be performed, the operator can remove the cover 13, remove the grindstone fixing nut 111, and replace the grindstone 10. This replacement work is also easy.

In addition, the dressing machine 1 can perform the dressing work for a plurality of types of cutters 100. In this case, the outer diameter and thickness of the cutting tool 103 may be different. In such a case, the dressing machine 1 can be used according to each type.

First, the case where the outer diameter of the cutting tool 103 becomes larger than the example of FIG. 5 is demonstrated. FIGS. 7A and 7B show a form when performing the setting work in this case. FIG. 7A corresponds to FIG. 5A, and FIG. 5B corresponds to FIG. Here, the outer diameter of the protective cover 104 is increased according to the outer diameter of the blade 103. In this case, as shown in FIG. 7B, the lower end portion of the protective cover 104 is formed in the saw-shaped valley portion (recessed portion) in the cutter cover locking portion 14 as compared with the case of FIG. The lower end of the protective cover 104 is locked to the trough on the left side (front in FIG. 1) in (b). Thereby, the same operation as described above is possible.

Generally, since the outer diameter of the blade part 103 in the cutter 100 is determined by the standard, the outer diameter of the protective cover 104 is also determined accordingly. For this reason, a plurality of types of blades 103 having different outer diameters are used by forming the saw shape in the cutter cover locking portion 14 such that a plurality of recesses according to this standard are configured. The sharpener 1 can be made to correspond to the type of cutter 100. Note that the cutter cover locking portion 14 is not limited to a saw shape, and may be constituted by a protruding portion such as a protective cover holding portion 15 provided on the left and right sides, and a non-slip member having a high friction coefficient is affixed thereto. May be.

The thickness of the protective cover 104 varies depending on, for example, the design philosophy of the tool manufacturer. In this case, in the sharpening machine 1, as shown in the right side views of FIGS. 8A and 8B, the attachment positions of the left protective cover holding portion base 153 and the right protective cover holding portion base 154 are attached. Can be adjusted. Accordingly, the positions of the left protective cover holding portion 151 and the right protective cover holding portion 152 in the left-right direction (the left-right direction in FIG. 8) can be adjusted. FIG. 8A shows a case where a thin protective cover 104 is used, and FIG. 8B shows a case where a thick protective cover 104 is used.

That is, by adjusting the locking position of the protective cover 104 with respect to the cutter cover locking portion 14 and the positions of the left protective cover holding portion 151 and the right protective cover holding portion 152, the sharpening operation of the plurality of types of cutters 100 can be performed. The sharpening machine 1 can be used.

In the above configuration, the braking mechanism 20 is used to generate a rotational speed difference between the grindstone 10 and the cutting tool 103. However, in order to generate the rotational speed difference, a driving mechanism for actively rotating the rotating shaft (grinding stone) may be provided on the dressing machine side. In the drive mechanism, for example, a motor that operates using a small battery as a power source can be used. In this case, since the rotation direction and rotation speed of the grindstone 10 can be set as appropriate, fine adjustment of the sharpening condition is facilitated.

On the other hand, when the braking mechanism 20 is used, it is difficult to finely adjust the rotational speed of the grindstone 10 (the rotational speed difference between the grindstone 10 and the cutting tool 103). 1 can be particularly small and light.

However, in an actual work site where various machine tools are used, a machine tool other than a sharpened cutter can be used as a drive source, and the dressing machine itself may not have a motor or power supply. it can. In this case, even if a drive mechanism is used, the dressing machine itself can be made lightweight.

FIG. 9 is a top view (a), a cross-sectional view (b), and a perspective view (c) from the top showing the configuration of the sharpening machine 2 having such a configuration. Here, in the cross-sectional view (b), a form in use is shown. Here, the configuration of the right half in the figure is the same as that of the dressing machine 1 except that the braking mechanism 20 is not used, the stand 90 is not used, and the left and right are reversed. For this reason, it is also possible to perform the form when performing the dressing work as described in FIG.

Here, the power transmission unit 30 is connected to the left side of the housing 13. In the power transmission unit 30, a power transmission shaft 31 is supported by a bearing 32 and is provided to protrude upward. The cross-sectional shape of the upper end portion of the power transmission shaft 31 is a hexagonal shape, which can be attached to the chuck 301 of the cordless driver 300, and can thereby be rotated. A pulley 33 is fixed below the power transmission shaft 31.

In the housing 13, a pulley 26 is fixed below the rotating shaft 11 instead of the braking mechanism 20. Since the belt 34 is stretched between the pulley 33 and the pulley 26, the pulley 26 and the rotating shaft 11 can be rotated along with the rotation of the power transmission shaft 31.

The power transmission unit 30 and the housing 13 are coupled by a coupling unit 35 and a coupling spring 36. At this time, the connection spring 36 is used for connection, so that the rotating shaft 11 can be driven with the tension of the belt 34 in an appropriate state.

In the dressing machine 2, the power transmission unit 30, the pulley 26, and the like function as a drive mechanism, and can transmit a rotational motion from the outside to the power transmission shaft 31 and transmit this to the rotational shaft 11. For this reason, the operator can operate the cordless driver 300 on the left side in FIG. 9B and support the cutter 100 and the like on the right side as in FIG. At this time, the rotation condition of the rotating shaft 11 (the grindstone 10) can be adjusted by operating the cordless driver 300.

As shown in FIG. 9, in the dressing machine 2, the power transmission unit 30 or the like is used instead of the braking mechanism 20, but the structure of the power transmission mechanism 30 is extremely simple as shown in FIG. 9. Yes, the whole can be made lightweight. Moreover, in the example of FIG. 9, although the cordless driver 300 was connected and used for the power transmission shaft 31, it is also clear that other electric tools can be used. In addition, the power transmission shaft 31 or the upper end portion thereof can be exchanged so as to be compatible with various power tools. Alternatively, besides a power tool, a tool driven using high-pressure air can also be used.

At this time, by making the power transmission shaft 31 and the rotating shaft 11 parallel, the rotating shaft 11 can be driven with a simple configuration using the pulleys 26 and 33 and the belt 34. At this time, it is particularly easy to drive the power transmission shaft 31 in the form shown in FIG.

However, a brake mechanism and a drive mechanism other than those described above can be used.

As in the example of FIG. 9, the stand is not necessary as long as the setting machine (housing) can be reliably fixed to the ground or the like. Further, as long as the cutter can be fixed to the dressing machine during the dressing operation, the position of the protective cover holding portion does not need to be variable, and the protective cover locking portion does not need to be provided with a plurality of recesses. Further, different configurations can be used to fix the cutter.

Moreover, the attachment position of the cover with respect to the housing (the position of the slit with respect to the grindstone) is not necessarily variable.

Furthermore, in the above example, the sharpening work was performed by bringing the cutting tool 103 into contact with the grindstone 10 provided on the horizontal plane from a direction perpendicular thereto. However, the direction in which the cutting tool comes into contact with the grindstone can be appropriately set according to the shape of the sharpening tool. For example, it may be preferable to perform a sharpening operation by bringing a cutting tool into contact with a grindstone rotating in a horizontal plane from the outside in the horizontal direction. In the dressing machine 1, the slit 131 is formed on the upper surface of the cover 13 (surface perpendicular to the rotating shaft 11). In this case, the slit is formed on the side surface of the cover (surface parallel to the rotating shaft). It is preferable to do. In accordance with this, the shape of the grindstone can be set as appropriate, and even in this case, it can be used in the same manner as long as it can be mounted on the rotary shaft.

Thus, the surface of the cover on which the slit is formed or the position where the slit is formed can be set as appropriate. Alternatively, the housing 12 and the internal configuration thereof may be as described above, and a plurality of types of covers having different slit formation positions may be appropriately selected and used. For this reason, in the above example, the case where the dressing operation is performed in the cutter having the configuration shown in FIG. 4 has been described. However, the dressing operation using the dressing machine of the present invention is performed on a tool that uses a blade having various shapes. Can be done.

DESCRIPTION OF SYMBOLS 1, 2, Sharpener 10 Grinding wheel 11 Rotating shaft 12 Case 13 Cover 14 Protective cover latching part 15 Protective cover holding part 16, 32 Bearing 17 Cover fixing part 20 Brake mechanism 21 Centrifugal clutch (brake mechanism)
22 Clutch weight (centrifugal clutch)
23 Clutch weight shaft (centrifugal clutch)
24 Clutch spring (centrifugal clutch)
25 Clutch drum (braking mechanism)
26, 33 Pulley (drive mechanism)
30 Power transmission part (drive mechanism)
31 Power transmission shaft 34 Belt 35 Connecting portion 36 Connecting spring 90 Stand 91 Stand mounting screw 100 Cutter 101 Main body 102 Drive shaft 103 Cutting tool 111 Whetstone fixing nut 131 Slit 132 Cover mounting screw 133 Cover mounting hole 104 Protective cover 151 Left side protective cover holding unit 152 Right protective cover holder 153 Left protective cover holder base 154 Right protective cover holder base 155 Protective cover holder base mounting screw 200 Sample to be cut 300 Cordless driver 301 Chuck

Claims (14)

A sharpening machine for sharpening the blade by sliding the blade against a grindstone, wherein the grindstone mounted on a rotating shaft is rotatably installed, and the grindstone in the housing A cover that is mounted on the upper side of the housing so as to cover the side where the wheel is installed and has a slit that exposes a part of the grindstone on a surface in a direction intersecting the rotation axis. A sharpening machine comprising a braking mechanism for braking the rotational movement of a shaft or a driving mechanism for rotating the rotational shaft. A sharpening machine for sharpening the blade by sliding the blade against a grindstone, wherein the grindstone mounted on a rotating shaft is rotatably installed, and the grindstone in the housing And a cover formed on the upper side of the housing so as to cover the side where the wheel is installed and formed with a slit exposing a part of the grindstone, and a braking mechanism for braking the rotational movement of the rotating shaft, or the comprising a driving mechanism for rotating the rotary shaft, the surface of the cover at one side in the longitudinal direction of the slit, dressing machine you wherein a protective cover locking portion is provided. The dressing machine according to claim 2 , wherein the protective cover locking portion includes a recess. The sharpening machine according to claim 3 , wherein a plurality of the concave portions are formed in the protective cover locking portion along a longitudinal direction of the slit. A sharpening machine for sharpening the blade by sliding the blade against a grindstone, wherein the grindstone mounted on a rotating shaft is rotatably installed, and the grindstone in the housing And a cover formed on the upper side of the housing so as to cover the side where the wheel is installed and formed with a slit exposing a part of the grindstone, and a braking mechanism for braking the rotational movement of the rotating shaft, Or a drive mechanism that rotates the rotating shaft, and the cover on one side in the longitudinal direction of the slit protrudes from the surface of the cover on each side of the slit in a direction perpendicular to the longitudinal direction. dressing machine it wherein a protective cover retaining portion is provided that. The dressing machine according to claim 5 , wherein the mounting positions of the two protective cover holding portions in the direction perpendicular to the longitudinal direction with respect to the cover are variable. A sharpening machine for sharpening the blade by sliding the blade against a grindstone, wherein the grindstone mounted on a rotating shaft is rotatably installed, and the grindstone in the housing And a cover formed on the upper side of the housing so as to cover the side where the wheel is installed and formed with a slit exposing a part of the grindstone, and a braking mechanism for braking the rotational movement of the rotating shaft, Or a drive mechanism for rotating the rotating shaft, and a stand fixed to the housing or the cover and grounded at a position separated from the housing when the housing is installed on the ground. dressing machine shall be the feature. The sharpening machine according to any one of claims 1 to 7 , wherein an attachment position of the cover with respect to the housing in a direction intersecting with a longitudinal direction of the slit is variable. The sharpening machine according to any one of claims 2 to 8 , wherein the rotation shaft is disposed substantially parallel to a surface of the cover on which the slit is formed. The sharpening machine according to any one of claims 1 to 9, wherein the grindstone has a disc shape. The brake mechanism is provided, and the brake mechanism includes a centrifugal clutch that transmits the rotational motion of the rotary shaft to a clutch drum fixed to the housing as the rotational speed of the rotary shaft increases. The dressing machine according to any one of claims 1 to 10, wherein: The dressing machine according to any one of claims 1 to 10 , further comprising the drive mechanism, wherein the drive mechanism rotates the rotating shaft by a motor. Comprising the drive mechanism, the drive mechanism can be of any claims 1, characterized by comprising a power transmission shaft for transmitting power to the rotary shaft with the rotational movement from the outside is transmitted to claim 10 The sharpening machine according to claim 1 . The dressing machine according to claim 13 , wherein the power transmission shaft and the rotation shaft are parallel to each other.

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