JP2014028490A - Cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting machine capable of precisely controlling a rotation angle of a driving part on a base.SOLUTION: A portion of a link engagement part 35, which is located in an elongated hole 421, is formed as a rotary pinion gear (an angle adjustment gear) 351. Correspondingly, an inner surface (a left side inner surface in Fig. 3) of the elongated hole 421, which faces the pinion gear 351, is toothed so as to engage with the pinion gear 351. That is, the pinion gear 351 (the link engagement part 35) and a link part 42 form a rack-and-pinion gear. This structure allows the pinion gear 351 to rotate, thereby changing the position of the pinion gear 351 in the elongated hole 421.

Description

The present invention relates to a structure of a cutting machine in which a rotary blade is fixed to a base, and the lower surface of the base is brought into contact with the sample to be cut to cut the sample to be cut.

  In order to cut wood, for example, wood board, a hand-held cutting machine is used. In a hand-held cutting machine, a motor for rotating a rotary blade (circular saw blade) is fixed to the base, and the rotary blade is configured to protrude partially from the opening provided in the base to the lower surface side of the base. . The user makes a cutting by bringing the lower surface of the base into contact with the sample to be cut (for example, a wooden board), bringing the rotary blade protruding toward the lower surface into contact with the sample to be cut, and moving the cutting machine or the sample to be cut. Work can be done. The cutting depth (cutting depth) in the sample to be cut is equal to the protruding amount of the rotary blade from the lower surface of the base.

  At this time, the rotary blade, the motor, and the rotation transmission mechanism (drive unit) are configured to rotate about the rotation axis on the upper surface of the base. The amount of protrusion of the rotary blade from the lower surface of the base can be adjusted by the rotation angle. Thereby, the cutting depth can be adjusted.

  In the cutting machine having such a configuration, first, the drive unit is configured so that the rotation angle does not change in a state where the user adjusts the rotation angle to adjust the protrusion amount of the rotary blade to a desired value. Fixed above. Thereafter, the actual cutting operation is performed. Patent Document 1 describes a cutting machine that can perform such operations precisely and easily.

  In this cutting machine, an elongated link part is formed on the side opposite to the rotation axis as seen from the drive part on the base or the rotation axis of the rotary blade. The link portion is fixed to the base side, and a long hole is formed. The guide part fixed to the drive part side penetrates this long hole, and it is set as the structure which a guide part can move in this long hole at the time of rotation of a drive part. When the drive unit is fixed to the base (the rotation angle is kept constant), the guide unit can be fixed in the elongated hole. FIG. 11A is a diagram schematically showing this configuration, and FIG. 11B is a cross-sectional view in the CC direction. In this figure, the rotation shaft of the drive unit is located outside the illustrated range on the right side. In this configuration, the elongated link portion 80 is fixed on the base by a pin 81. A long hole 82 is formed in the link part 80, and a guide part 91 fixed to the drive part side passes through the long hole 82. When the drive unit rotates, the guide unit 91 slides in the elongated hole 82 and moves. For this reason, after the position in the elongated hole 82 of the guide part 91 is determined so that the protrusion amount of the rotary blade becomes a desired value, the guide part 91 (drive part) is fixed to the link part 80 (base). By doing so, the protruding amount of the rotary blade is adjusted.

  In order to perform this fixing, an angle fixing mechanism 50 attached to the drive unit side is used. In the angle fixing mechanism 50, a lever 52 is used that rotates about a cam 51 provided on the right side near the link unit 80 and extends so that the tip of the cam 51 exists on the left side of the link unit 80. A leaf spring 53 having a convex shape toward the link portion 80 is attached to the lever 52 by fixing one end to the leaf spring fixture 54 and the other end to the cam 51. With this configuration, the convex portion of the leaf spring 53 can be brought into contact with the link portion 80 by rotating the lever 52 counterclockwise in FIG. Thereby, the drive unit can be fixed to the link unit 80. In addition, even if the link part 80 is being fixed with respect to the base, you may be set as the structure which can be rotated on a base centering on the pin 81. FIG.

  According to this configuration, the user can easily adjust the cutting depth.

JP 2010-36269 A

  In the above-described cutting machine, the cutting depth is easily adjusted, but the adjustment is performed by adjusting the position of the guide portion 91 in the long hole 82. At this time, it is necessary for the user to rotate the drive unit to which the rotary blade is attached. Here, since the drive unit includes a motor, a rotation transmission mechanism (gear) and the like, and a rotary blade or the like is connected to the drive unit, the weight of the rotating portion is very heavy. It was difficult for the user to precisely control the rotation angle of this heavy part and to precisely control the cutting depth.

  That is, it has been difficult to obtain a cutting machine that can precisely control the rotation angle of the drive unit on the base.

  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.
The cutting machine of the present invention is fixed to the upper surface of the base in a state in which the drive unit for rotating the rotary blade is rotatable about the rotation shaft, and the rotary blade protruding from the lower surface of the base is used to A cutting machine for cutting a sample to be cut installed on a lower surface side, wherein the link unit is connected to the base, is connected to the drive unit, and is locked to the link unit, and the drive unit is rotated. A link locking portion that moves in the longitudinal direction of the link portion, and by rotating a portion of the link locking portion that contacts the link portion, the link locking portion in the longitudinal direction of the link portion And the rotation angle of the driving unit is controlled.
The cutting machine according to the present invention is characterized in that the amount of protrusion of the rotary blade protruding from the lower surface of the base can be adjusted by a rotation angle about the rotation axis.
The cutting machine according to the present invention is characterized in that an angle formed by the rotary blade and the lower surface of the base can be adjusted by a rotation angle about the rotation axis.
The cutting machine according to the present invention is characterized in that the link portion is installed on the opposite side of the rotating shaft on the base as viewed from the rotating shaft of the rotary blade.
In the cutting machine of the present invention, the link locking portion is fixed to a saw cover that covers the rotary blade on the upper side of the base and is fixed to the driving portion, and the link portion is It is characterized by being fixed to the base so as to be in a form along the inner surface of the saw cover in the interior covered with the saw cover.
In the cutting machine of the present invention, the portion of the link locking portion that contacts the link portion is an angle adjusting gear, and the link portion is geared so as to mesh with the angle adjusting gear. Features.
In the cutting machine according to the present invention, the portion of the link locking portion that contacts the link portion is formed of an elastic body.
In the cutting machine according to the present invention, a portion of the link locking portion that contacts the link portion is configured to be movable in a direction of an angle adjusting rotary shaft that is a rotation axis of the link locking portion. By moving the portion in contact with the portion along the rotation shaft for angle adjustment, the portion in contact with the link portion in the link locking portion and the link portion are not in contact with each other.
In the cutting machine of the present invention, the link part has a long hole, and the link locking part is locked to the link part in the long hole.

  Since this invention is comprised as mentioned above, the cutting machine which can control precisely the rotation angle of the drive part on a base can be obtained.

It is a perspective view of the cutting machine used as an embodiment of the invention. It is a front view of the cutting machine used as an embodiment of the invention. It is a front view which expands and shows the structure of the link part periphery used in the cutting machine used as embodiment of this invention. It is sectional drawing of the link latching | locking part periphery used in the cutting machine used as embodiment of this invention. It is a front view which expands and shows the structure of the other examples of the periphery of a link part used in the cutting machine which becomes embodiment of this invention. It is sectional drawing of the periphery of the other examples of the link latching | locking part used in the cutting machine which is embodiment of this invention. It is a perspective view of the 1st modification of the cutting machine which becomes embodiment of this invention. It is a perspective view of the 2nd modification of the cutting machine which becomes embodiment of this invention. It is a front view of the 3rd modification of the cutting machine which becomes embodiment of this invention. It is a perspective view which shows the structure at the time of adjusting the cutting depth to three steps in the cutting machine used as embodiment of this invention. It is a front view which expands and shows the structure of the link part periphery used in the conventional cutting machine.

  The structure of the cutting machine which becomes embodiment of this invention is demonstrated. FIG. 1 is a perspective view showing the configuration of the cutting machine 10, and FIG. 2 is a front view thereof. In the cutting machine 10, a drive unit 30 that rotates a rotary blade (round saw blade) 20 is fixed to the upper surface of the base 40. Here, the front view is a view seen from the direction of the arrow in FIG. 1, and is a view seen from the direction opposite to the drive unit 30 when viewed from the rotary blade 20 along the rotation axis 21 of the rotary blade 20. is there. The angle formed by the rotary blade 20 and the upper surface or the lower surface of the base 40 can be adjusted. In the following, this angle is assumed to be vertical, and the case where it is not vertical will be described later.

  The drive unit 30 incorporates a motor, gears (rotational motion transmission mechanism), and the like, and rotates the rotary blade 20 attached to the rotary shaft 21 counterclockwise in FIG. As shown in FIG. 2, the outer periphery of the rotary blade 20 is subjected to a cutting process, and the rotary blade 20 projects downward from a rectangular opening (not shown) provided in the base 40. The configuration is In this cutting machine 10, the sample to be cut is arranged on the lower surface side of the base 40, and cutting is performed by bringing the sample to be cut into contact with the rotary blade 20 from the right side in FIG. On the upper surface side of the base 40, the outer periphery of the rotary blade 20 attached with a blade is covered with a saw cover 31 fixed to the drive unit 30. In addition, on the lower surface side of the base 40, the outer periphery of the rotary blade 20 that is attached to the outer side of the base 40 except for the right region that is in contact with the sample to be cut is covered with a protective cover 32. The protective cover 32 is configured to be able to rotate inside covered with the saw cover 31 around the rotation shaft 21. Further, the protective cover 32 is urged counterclockwise in FIG. 2 by a spring. For this reason, when the cutting machine 10 (rotary blade 20) advances to the right side with respect to the sample to be cut during cutting, the protective cover 32 rotates clockwise in FIG. The state where the end is in contact with the sample to be cut is maintained. Thereby, outside the cutting region, the outer periphery of the bladed rotary blade 20 is always covered with the protective cover 32 or the saw cover 31.

  Further, a handle 33 is attached above the drive unit 30, and the user can hold the handle 33 to move the cutting machine 10 over the sample to be cut or carry it. . Further, the handle 33 is provided with a switch 34, and the user can control the turning on / off of the rotary blade 20 by operating the switch 34.

  The drive unit 30 is integrated with the rotary blade 20, the saw cover 31, and the like, and can be rotated around the rotation shaft 41 on the upper surface side of the base 40. By adjusting the rotation angle, the protruding amount of the rotary blade 20 from the lower surface side of the base 40 is adjusted. Thereby, the cutting depth in the sample to be cut is adjusted.

  On the upper surface of the base 40, a link portion 42 is fixed by a pin 43 on the side opposite to the rotation shaft 41 when viewed from the rotation shaft 21. FIG. 3 is an enlarged front view of the schematic structure around the link portion 42. A long hole 421 is formed in the link part 42, and the link locking part 35 installed on the saw cover 31 (drive part 30) side at the time of rotation around the rotation shaft 41 is the long hole 421. It can be moved inside. 2, the periphery of the link portion 42 is hidden by the saw cover 31, and FIG. 3 is an enlarged view of the periphery of the link portion 42 as viewed from the direction of FIG. In FIG. 3, the rotating shaft 21 and the rotating shaft 41 are located outside the illustrated range on the right side.

  The point that the link locking portion 35 moves in the elongated hole 421 during the rotation is the same as the technique described in Patent Document 1. However, in the link locking portion 35, a rotatable pinion gear (angle adjusting gear) 351 is in contact with the inner surface of the elongated hole 421. Correspondingly, the inner surface (the left inner surface in FIG. 3) of the elongated hole 421 that contacts the pinion gear 351 is geared so as to mesh with the pinion gear 351. That is, a rack and pinion is formed by the pinion gear 351 (link locking portion 35) and the link portion 42. With this configuration, when the user rotates the pinion gear 351, the position of the pinion gear 351 in the elongated hole 421 can be moved.

  On the other hand, when the position of the pinion gear 351 in the elongated hole 421 is determined, the drive unit 30 or the saw cover 31 and the base 40 are fixed in this state. For this purpose, an angle fixing mechanism 50 attached to the saw cover 31 is used. As the angle fixing mechanism 50, the same structure as shown in FIG. 11 is used. That is, the convex portion of the leaf spring 53 can be brought into contact with the link portion 42 by rotating the lever 52 counterclockwise. Thereby, the link part 42 (base 40) can be fixed with respect to the saw cover 31 (drive part 30). The angle fixing mechanism 50 limits the pressing force between the link portion 42 and the link locking portion 35 by disposing the lever 52 at an intermediate position for fine adjustment work to be described later, and the operator moves the hand from the pinion gear 351. Even if they are separated, the depth of cut does not change depending on the weight of the drive unit 30, and a fine adjustment position can be provided that allows fine adjustment against the pressing force when the pinion gear 351 is rotated. Alternatively, the angle fixing mechanism 50 and the link locking portion 35 can be linked so that the angle fixing mechanism is automatically locked when the operator releases the hand from the angle fixing mechanism 50. If comprised in this way, it can prevent that a cutting depth changes by the dead weight of the drive part 30, etc. after an operator finely adjusts the cutting depth.

  FIG. 4 is a cross-sectional view in the AA direction in FIG. 3, and schematically shows the structure of the link locking portion 35 in the direction perpendicular to the paper surface in FIG. 3. Here, it is not necessary to always mesh the pinion gear 351 and the inner surface of the elongated hole 421, and the configuration is such that these can be meshed as necessary. FIG. 4A shows a state where these are not meshed, and FIG. 4B shows a state where these are meshed.

  Here, the pinion gear 351 is fixed to one end (lower end) of a gear shaft (angle adjusting rotation shaft) 352 serving as a rotation shaft thereof. The gear shaft 352 is installed on the saw cover 31 by inserting a link locking portion fixing portion 353 fixed to the saw cover 31 in a rotatable state. A knob 354 is fixed to the other end (upper end) of the gear shaft 352. Further, the gear shaft 352 is provided with a gear shaft side spring clamping surface 355, the link latching portion fixing portion 353 is also provided with a spring clamping surface 356, and a spring 357 around which the gear shaft 352 is wound includes a gear shaft side spring. It is clamped between the clamping surface 355 and the spring clamping surface 356. With this spring 357, as shown in FIG. 4A, the gear shaft side spring clamping surface 355 fixed to the gear shaft 352 is fixed to the upper surface side of the link locking portion fixing portion 353. For this reason, the pinion gear 351 is normally positioned above the link portion 42 in FIG. 4A and does not contact the inner surface (link portion 42) of the elongated hole 421. That is, the pinion gear 341 and the inner surface of the elongated hole 421 do not mesh with each other. In this case, for example, the user can hold the handle 33 and rotate the drive unit 30 and the like.

  On the other hand, as shown in FIG. 4B, when the user pushes the knob 354 downward in the figure against the spring 357, the pinion gear 351 moves downward, and the inner surface of the elongated hole 421 and the pinion gear are moved. 351 can be meshed. Thereafter, when the user rotates the knob 354, the position of the pinion gear 351 in the elongated hole 421 (link portion 42) can be determined.

  In this adjustment, the user can first perform the coarse adjustment of the rotation angle by turning the drive unit 30 with the handle 33 in the state shown in FIG. Thereafter, the user can finely adjust the rotation angle by rotating the knob 354 with the link locking portion 35 in the state shown in FIG. 4B. Then, if the drive part 30 and the link part 42 (base 40) are fixed using the angle fixing | fixed part 50 as above-mentioned, the protrusion amount (cutting depth) from the lower surface side of the base 40 of the rotary blade 20 will be fixed. Can do.

  That is, the cutting depth can be easily and precisely controlled using the link portion 42 fixed to the base 40 and the link locking portion 35 fixed to the drive unit 30 or the saw cover 31.

  The position of the link portion on the upper surface side of the base is arbitrary as long as the above function can be realized. However, from the viewpoint of precisely controlling the rotation angle, a link portion is provided on the side away from the rotation shaft, for example, on the opposite side of the rotation shaft as viewed from the drive portion, and the link locking portion moves in the elongated hole. It is preferable to take a wide interval. From the viewpoint of reducing the link portion, it is preferable to provide the link portion near the rotation shaft.

  Also, the configuration of the link portion is arbitrary as long as the link portion (elongate hole) and the link locking portion can be adjusted by a rotation operation on the link locking portion. For example, in the above example, the link portion 42 is fixed to the base 40 by the pin 43, but the link 42 may be rotatable around the pin 43, and is fixed so that rotation is impossible. May be.

  In FIG. 1, the angle (cutting angle) formed between the rotary blade 20 and the lower surface or the upper surface of the base 40 is vertical (90 °). However, this cutting angle is set to an arbitrary angle other than 90 ° by adopting a configuration in which the drive unit 30 can be rotated (second rotation) in a direction perpendicular to the rotation around the rotation shaft 41. You can also. In this case, the same configuration as described above can be used. In FIG. 1, the second link portion 44 is provided on the base 40 in accordance with the second rotation. A second link locking portion corresponding to the second link portion 44 is also installed on the drive portion (saw cover) side. Correspondingly, the link portion 42 is also fixed to the base 40 so as to be able to tilt in the second rotation direction in accordance with the second rotation. Accordingly, the cutting depth can be adjusted as described above, and the cutting angle can be adjusted by the second rotation, and both adjustments can be performed precisely. Similarly, it is obvious that an angle fixing portion that fixes the second rotation angle can be used.

  Moreover, the structure which can adjust the position of the link latching | locking part in the long hole of a link part by rotation operation of a link latching | locking part is realizable, without using a rack and pinion. FIG. 5 is a front view schematically showing the configuration of the link portion 62 and the link locking portion 36 as an example, and FIG. 4 is a cross-sectional view in the BB direction. Here, an elastic ring 361 is used instead of the pinion gear 351, and the shape of the inner surface of the elongated hole 621 in the link portion 62 is also different from the above example. However, as in the above example, the portion of the link latching portion that contacts the inner surface of the elongated hole is moved by moving the portion of the link latching portion that contacts the inner surface of the elongated hole in the direction of the angle adjusting rotary shaft. It can be set as the state which is not in contact with the inner surface. That is, there can be two types of states: a state where the elastic ring 361 and the inner surface of the elongated hole 621 are not in contact (FIG. 6A) and a state where the elastic ring 361 is in contact with the inner surface of the elongated hole 621 (FIG. 6B).

  Here, as shown in FIG. 6, in this link portion 62, an elastic ring (elastic body) 361 is fixed to one end (lower end) of an elastic body shaft (angle adjusting rotation shaft) 362. The elastic body shaft 362 is installed in the saw cover 31 by inserting the link locking portion fixing portion 363 fixed to the saw cover 31. A knob 364 is fixed to the other end of the elastic body shaft 362. The elastic shaft 362 is provided with an elastic shaft-side spring clamping surface 365, the link latching portion fixing portion 363 is also provided with a spring clamping surface 366, and the spring 367 around which the elastic shaft 362 is wound is elastic. It is clamped between the body axis side spring clamping surface 365 and the spring clamping surface 366. With this spring 367, as shown in FIG. 6A, the elastic body shaft side spring clamping surface 365 fixed to the elastic body shaft 362 is fixed to the upper surface side of the link locking portion fixing portion 363. For this reason, the elastic ring 361 is normally positioned above the link part 62 in FIG. 6A and does not contact the inner surface (link part 62) of the elongated hole 621. In this case, for example, the user can easily rotate the drive unit 30 and the like by holding the handle 33.

  On the other hand, the inner surface on the left side of the link portion 62 constituting the elongated hole 621 in FIG. 6 is tapered so that the inner diameter is large on the upper side and the inner diameter is narrow on the lower side, as shown. For this reason, when the knob 364 is pushed down as shown in FIG. 6B, the elastic ring 361 comes into contact with the inner surface of the link portion 62 on the left side. When the user rotates the knob 364 in this state, the positional relationship between the elastic ring 361 and the link portion 62 can be adjusted in the same manner as the relationship between the pinion gear 351 and the link portion 42 described above. Here, in the case of the combination of the pinion gear 351 and the link portion 42, there is a state in which the gears do not mesh with each other when the knob 354 is pushed downward in FIG. When the link portion 62 is used, the elastic ring 361 and the link portion 62 can always be brought into contact with each other, and the positional relationship between them can be adjusted.

  Then, if the drive part 30 and the link part 62 (base 40) are fixed using the angle fixing | fixed part 50 as above-mentioned, the protrusion amount (cutting depth) from the lower surface side of the base 40 of the rotary blade 20 will be fixed. Can do.

  About each component of said cutting machine, as long as the function can be performed, it can change suitably. For example, as shown in FIG. 7, in the cutting machine 10 of FIG. 1, the gear shaft 352 can be extended and the knob 354 can be disposed away from the link portion 42. In the configuration of FIG. 1, since the structures are densely arranged around the link portion 42, it may be difficult for the user to operate (rotate or push) the knob 354. On the other hand, in the configuration of FIG. 7, the knob 354 is provided in a place where there is no structure around, so that the operation is particularly easy.

  Further, as shown in FIG. 8, the lever 52 may be extended. In this case, particularly when the lever 52 is protruded outward from the saw cover 31, the operation (fixing of the link locking portion 35 and the link portion 42 by the turning operation of the lever 52) is facilitated.

  Further, the positional relationship between the link part 42 and the saw cover 31 can be variously configured as long as the link locking part 35 and the angle fixing mechanism 50 can be used between them. FIG. 9 is a front view (partially perspective view) corresponding to FIG. 2 of this example. In this configuration, the link portion 72 is also provided inside the saw cover 31 similarly to the rotary blade 20 and the protective cover 32, and the link locking portion 35 is installed near the left end portion of the saw cover 31. ing. The link portion 72 has a plate shape, and FIG. 9 is a view seen from the thickness direction. The inside of the saw cover 31 is shown in a transparent manner around the link portion 72. In the configuration of FIGS. 1 and 2, the direction in which the elongated hole 421 passes through the link portion 42 is a direction parallel to the rotating shaft 21 or the rotating shaft 41, whereas in this example, the elongated hole in the link portion 72 is The direction is perpendicular to the rotating shaft 21 or the rotating shaft 41. FIG. 9 is a front view as seen from the side perpendicular to the direction of penetration of the long hole in the link portion 72. In this configuration, the link locking portion 35 and the angle fixing mechanism 50 are provided on the inner surface on the upper left side in FIG. 9 of the saw cover 31 (the inner surface facing the outer periphery of the rotary blade 20 or the protective cover 32). 42 is installed inside the saw cover 31 so that the outer side of the rotary blade 20 or the protective cover 32 exists along the inner surface. When the saw cover 31 (driving unit 30) rotates around the rotation shaft 41, the inner surface of the saw cover 31 moves along the link portion. The link portion 72 is installed on the base 40 so as to be rotatable about the link portion rotation shaft 45, and the link portion 72 has a curved shape as shown in FIG. Easy. However, if the inner surface of the saw cover 31 can move along the link portion 72, the link portion 72 does not have to be rotatable about the link portion rotation shaft 45.

  Also in this configuration, the positional relationship between the link portion 42 (base 40) and the link locking portion 35 is adjusted and the positional relationship is fixed by the angle fixing mechanism 50, as in the cutting machine 10 configured as shown in FIG. It is possible. In the case of this configuration, since the link part 42 can be accommodated inside the saw cover 31, the parts exposed to the outside can be reduced, and the entire apparatus can be downsized.

  In addition, the form which provided the link part in the inside covered with the saw cover 31 in this way can also be realized in configurations other than FIG. For example, in the example of FIG. 9, the inner surface of the saw cover 31 that faces the link portion 72 is the inner surface that faces the outer periphery of the rotary blade 20, but the other inner surface is configured along the link portion, The part 35 and the angle fixing mechanism 50 can also be installed. The shapes of the link part and the long hole can be appropriately set according to this configuration. Such a form can be realized regardless of the shape of the protective cover 32 and the presence or absence thereof.

  10A to 10C are perspective views when the cutting depth is set to three types of large (a), medium (b), and small (c) in the above-described cutting machine 10. Here, the cutting angle is vertical. These figures are perspective views seen from the same direction as FIG.

  In addition, the structure of the angle fixing | fixed part in said structure is arbitrary as long as the rotation angle of the drive part on a base can be fixed. Further, the configuration of the drive unit and the base is arbitrary as long as the above-described link locking unit and link unit can be installed.

10 Cutting machine 20 Rotating blade (round saw blade)
21 Rotating shaft 30 Driving portion 31 Saw cover 32 Protective cover 33 Handle 34 Switch 35, 36 Link locking portion 40 Base 41 Rotating shaft 42, 62, 72, 80 Link portion 43, 81 Pin 44 Second link portion 45 Link portion rotation Driving shaft 50 Angle fixing mechanism 51 Cam 52 Lever 53 Leaf spring 54 Leaf spring fixing tool 82, 421, 621 Long hole 91 Guide portion
351 Pinion gear (angle adjustment gear)
352 Gear shaft (rotating shaft for angle adjustment)
353, 363 Link locking portion fixing portion 354, 364 Knob 355 Gear shaft side spring clamping surface 356, 366 Spring clamping surface 357, 367 Spring 361 Elastic ring (elastic body)
362 Elastic shaft (rotating shaft for angle adjustment)
365 Elastic body shaft side spring clamping surface

Claims (9)

A driving unit for rotating the rotary blade is fixed to the upper surface of the base so as to be rotatable about a rotation axis, and is installed on the lower surface side of the base by the rotary blade protruding from the lower surface of the base. A cutting machine for cutting a cutting sample,
A link connected to the base;
A link locking part connected to the driving part and locked to the link part, and moving in the longitudinal direction of the link part when the driving part is rotated,
The position of the link locking part in the longitudinal direction of the link part is controlled by rotating the part of the link locking part that contacts the link part, and the rotation angle of the driving part is controlled. And cutting machine.   2. The cutting machine according to claim 1, wherein an amount of protrusion of the rotary blade protruding from the lower surface of the base is adjustable by a rotation angle about the rotation axis.   The cutting machine according to claim 1 or 2, wherein an angle formed by the rotary blade and the lower surface of the base can be adjusted by a rotation angle about the rotation axis.   3. The cutting machine according to claim 1, wherein the link portion is installed on the base on the side opposite to the rotation shaft when viewed from the rotation shaft of the rotary blade. The link locking portion is fixed to a saw cover that covers the rotary blade on the upper side of the base and is fixed to the driving portion,
The link unit is fixed to the base so as to be in a form along the inner surface of the saw cover in the interior covered with the saw cover when the driving unit is rotated. Cutting machine. The portion of the link locking portion that contacts the link portion is an angle adjusting gear.
The cutting machine according to any one of claims 1 to 5, wherein the link portion is cut so as to mesh with the angle adjusting gear.   The cutting machine according to any one of claims 1 to 5, wherein a portion of the link locking portion that is in contact with the link portion is formed of an elastic body. The portion in contact with the link portion in the link locking portion is configured to be movable in the direction of the rotation shaft for angle adjustment that is the axis of rotation.
By moving the portion of the link latching portion in contact with the link portion along the rotation shaft for angle adjustment, the portion of the link latching portion in contact with the link portion and the link portion are not in contact with each other. The cutting machine according to any one of claims 1 to 7, characterized in that:   The said link part has an elongate hole, The said link latching | locking part is latched by the said link part in the said elongate hole, The any one of Claim 1-7 characterized by the above-mentioned. Cutting machine.

Images