JP4692840B2 - Tabletop cutting machine - Google Patents

Description

  The present invention relates to a tabletop cutting machine that places a processing member on an upper surface of a base portion and swings a cutting blade up and down to cut the processing member.

  2. Description of the Related Art A tabletop cutting machine that cuts a processing member by placing the processing member on a base portion and swinging a cutting blade up and down is conventionally known. As shown in FIG. 6, the base portion 110 of the tabletop cutting machine 101 is formed with a groove 112a (FIG. 7 and the like) into which a circular saw blade 134 as a cutting blade can enter when the cutting portion swings downward. ing.

  When cutting with the tabletop cutting machine 101, when the cutting is performed in the state shown in FIG. 6, the rotation of the circular saw blade 134 of the portion of the circular saw blade 134 cut into the workpiece 102 is performed. At the position on the upstream side in the direction, that is, the position of the circular saw blade 134 that is the cutting blade cut into the processing member 102, the position on the right side shown in FIG. Since rotation of 134 generates a force toward the lower left direction in FIG. 6, which is a direction in which the wood fiber is separated from the processed member 102, burrs and edges are generated.

  In cutting external members such as decorative plywood, the reduction of burrs and edges is particularly important. For this reason, the edge plate 114,115 which can adjust the opening width of the opening part of the groove | channel 112a is provided in the groove | channel 112a of the base part 110. As shown in FIG. The blade opening plates 114 and 115 are moved so that the opening width is reduced to the thickness of the circular saw blade 134, and cutting can be performed so that no burrs or edges are generated.

As shown in FIG. 7, when the circular saw blade 134 is perpendicular to the upper surface of the base portion 110 and when the circular saw blade 134 is inclined with respect to the upper surface of the base portion 110 as shown in FIG. The width of the circular saw blade 134 in the direction parallel to the upper surface of the base portion 110 at the opening of the groove 112a is different. For this reason, each time the inclination angle is changed, the screw 116 that fixes the blade edge plates 114 and 115 is loosened, and the blade edge plates 114 and 115 are moved to match the width of the circular saw blade 134 to open the groove 112a. Cutting is performed after adjusting the opening width of the portion and fixing the screw 116 again. Such a tabletop cutting machine 101 is described in, for example, Japanese Utility Model Publication No. 63-080101 (Patent Document 1).
Japanese Utility Model Publication No. 63-080101

  In the conventional tabletop cutting machine 101, it is necessary to manually move the blade edge plates 114 and 115 each time the inclination angle of the circular saw blade 134 is changed in order to prevent burrs and edges from occurring as described above. was there. Therefore, the present invention has an object to provide a tabletop cutting machine that can easily cut by linking the movement of the blade plate in accordance with the inclination of the cutting portion, reducing the burrs on the processed member surface, improving the finish. To do.

In order to achieve the above-described object, the present invention provides a cutting portion that can rotatably support a cutting blade and swing in a vertical direction, and can support a processing member, and when the cutting portion swings downward, A base part having a groove into which a cutting blade can enter, and a rear part of the base part so as to be inclined with respect to the upper surface of the base part, and the cutting part swings up and down with respect to the upper surface of the base part A holder that is freely supported, a blade opening plate that is provided in the groove and is movable in the thickness direction of the cutting blade, a cam that is supported by the holder and that always rotates integrally with the tilting of the holder, and the blade opening plate A tilt interlocking mechanism having a contact surface supported by the cam and capable of always contacting the cam, and having a contact member that can move integrally with the blade edge plate by the rotation of the cam. mechanism is provided between the holder and the blade outlet plate, desktop switching for changing the opening width of the groove due to tilting of the holder It has to offer aircraft. The tilt angle of the holder increases when the tilt angle in a state where the holder is perpendicular to the upper surface of the base portion is set to 0 degree as a reference, and the tilt angle from the standard state where the holder is perpendicular increases. Means.

Here, a pair of the blade edge plates are provided on both sides of the groove opening in the width direction of the groove, extending along the groove and parallel to the upper surface of the base portion. The tilt interlocking mechanism is provided so as to be movable parallel to the upper surface of the base portion and symmetrically in the width direction, and the cam presses the corresponding contact surface to increase the opening width as the tilt angle of the holder increases. It is preferable that it is comprised.

  Moreover, it is preferable that this tilting interlocking mechanism has an urging means for urging the blade edge plate so that the blade edge plate is always in contact with the cam.

  According to the tabletop cutting machine according to claim 1 of the present invention, since it is provided with a tilting interlocking mechanism that is provided between the holder and the blade plate and that can change the opening width of the groove as the holder tilts, The blade edge plate can be automatically moved according to the tilting amount of the cutting blade. For this reason, it is possible to save the trouble of manually moving the blade edge plate and adjusting the opening width of the groove, and to minimize the occurrence of burrs and edging at the edge generated by cutting the processing member with the cutting blade. Can be prevented. That is, the finish of the processed member can be improved and cutting can be easily performed.

  According to the tabletop cutting machine according to claim 2 of the present invention, a pair of blade plates are provided on both sides of the groove opening in the groove width direction along the groove and in parallel with the upper surface of the base part. The blade edge plate is provided so as to be movable parallel to the upper surface of the base portion and symmetrically in the width direction, and the tilting interlocking mechanism is configured to increase the opening width as the tilting angle of the holder increases. As the tilt angle increases, the blade plate can be automatically moved to obtain the optimum groove opening width.

  According to the tabletop cutting machine of the third aspect of the present invention, the tilting interlocking mechanism is supported by the holder and is always supported by the pair of blade plates and the cam that is always rotated integrally with the tilting of the holder. Since each of the contact members has a contact surface that can be contacted, and has a pair of contact members that can move integrally with the blade plate by the rotation of the cam, the cam tilts the contact surface of the contact member. By pressing, the blade edge plate can be moved integrally with the contact member.

  According to the tabletop cutting machine of the fourth aspect of the present invention, the tilting interlocking mechanism has the urging means for urging the blade edge plate so that the blade edge plate always abuts against the cam. It is possible to reliably prevent the cam and the contact surface of the contact member from being separated after the contact surface is moved by the cam pressing the contact surface.

  A tabletop cutting machine according to an embodiment of the present invention will be described with reference to FIGS. The tabletop cutting machine 1 has a base portion 10 and a cutting portion 30 (FIG. 2 and the like), and the base portion 10 has a base 11 and a turntable 12. As shown in FIG. 1, the turntable 12 is embedded in the center of the base 11, and the turntable 12 can be rotated in the horizontal direction by the base 11, that is, rotates about a rotation axis that is oriented in a substantially vertical direction. It is supported freely. The upper surface of the turntable 12 is flush with the upper surface of the base 11, and a processing member 2 (such as FIG. 2) such as wood can be placed on the upper surfaces of the base 11 and the turntable 12. The upper surface of the turntable 12 and the upper surface of the base 11 correspond to the upper surface of the base portion 10.

  As shown in FIG. 1 or 2, a pair of fences 13, 13 that support the side surface of the processed member 2 are separated from each other by a predetermined distance and extend in the left-right direction in FIG. It is installed. At the center between the upper surface of the turntable 12 and between the pair of fences 13 and 13, when a circular saw blade 34 as a cutting blade swings downward as will be described later, it is lower than the upper surface of the turntable 12. Grooves 12a are formed that can penetrate into the grooves. Edge plates 14 and 15 are provided on both sides of the groove 12a.

  The blade end plates 14 and 15 are provided in the recesses 12d and 12e and the guide grooves 12b and 12c formed on the turntable 12 along both sides of the opening of the groove 12a. It is arranged so as to cover. As shown in FIG. 1, the upper surfaces of the blade edge plates 14 and 15 have a substantially rectangular shape, extend along the groove 12 a on both sides of the groove 12 a, and are flush with the upper surface of the turntable 12. As shown in FIG. 1, long holes 14 a, 14 b, 15 a, 15 b that are penetrating in the vertical direction are formed in the blade plates 14, 15, and the long holes 14 a, 14 b, 15 a, 15 b The longitudinal direction is directed in the width direction of the groove 12a, that is, in the left-right direction in FIG. A screw 16 passes through each of the long holes 14a, 14b, 15a, and 15b and is screwed into the turntable 12. When the screw 16 moves relative to the long holes 14a, 14b, 15a, 15b in the longitudinal direction of the long holes 14a, 14b, 15a, 15b, the blade edge plates 14, 15 have the recesses 12d, 12e and the guide grooves. In 12b and 12c, the circular saw blade 34, which will be described later, can be slid along the guide grooves 12b and 12c in parallel to the upper surface of the base portion 10 in the thickness direction, that is, in the left-right direction in FIG. The opening width of the groove 12a defined between the blade edge plates 14 and 15 can be adjusted by sliding in the direction.

  Further, a pair of spring grooves 12f and 12g are formed in the turntable 12 so as to extend in the left-right direction in FIG. 1 at symmetrical positions about the groove 12a, and the spring 17 is provided in the spring grooves 12f and 12g. , 18 are provided. One ends of the springs 17 and 18 are in contact with the portion of the turntable 12 that defines one end of the spring grooves 12f and 12g, and the other end of the spring 17 is in contact with the right side surface of the blade plate 15 shown in FIG. The blade edge plate 15 is urged to the left in FIG. The other end of the spring 18 is in contact with the left side surface of the blade edge plate 14 shown in FIG. 1, and urges the blade edge plate 14 to the right in FIG. Accordingly, the springs 17 and 18 urge the blade edge plates 14 and 15 in directions in which the pair of blade edge plates 14 and 15 approach each other. Therefore, after the cam 22 presses the contact surfaces 19A and 20A of the contact member and moves the contact members 19 and 20 and the blade edge plates 14 and 15 as described later, the cam 22 and the contact member 19 are moved. , 20 can be reliably prevented from separating from the contact surfaces 19A, 20A. The springs 17 and 18 correspond to biasing members.

  Abutting members 19 and 20 are provided at one end in the longitudinal direction of the blade edge plates 14 and 15 having a substantially rectangular shape and positioned at the upper side in FIG. As shown in FIG. 4, the contact members 19 and 20 are provided integrally with the pair of blade plates 14 and 15, respectively. As shown in FIG. 4, the contact surfaces 19 </ b> A and 20 </ b> A are respectively provided. The contact surfaces 19A, 20A are configured to always contact a cam surface 22A of a cam 22 described later. Thus, the blade edge plates 14 and 15 are configured to be positioned by contacting the cam surface 22A. As will be described later, by automatically moving the blade edge plates 14 and 15 so that the blade edge plates 14 and 15 are positioned immediately next to the circular saw blade 34, the opening width of the groove 12a is adjusted. When the lower end of the circular saw blade 34 is lowered from the upper surface of the turntable 12 and enters the groove 12a when the member 2 is cut, the blade edge plates 14 and 15 prevent flaking of the finished surface of the lower surface of the processed member 2. It is configured to be able to.

  A holder 40 is erected at the rear end of the turntable 12, that is, the left end of the base 11 shown in FIG. The lower end of the holder 40 is supported by a holder shaft 21 that extends from the turntable 12 to the left in FIG. By making the axis of the holder shaft 21 substantially coincide with the upper surface of the turntable 12, the holder 40 can be tilted to the left and right with respect to the upper surface of the turntable 12 with the holder shaft 21 as a rotation fulcrum.

  The holder shaft 21 is fixed to the holder 40 by screws or the like (not shown). When the holder 40 is tilted, the holder shaft 21 serving as a tilting axis also rotates together with the holder 40. Further, a cam 22 having a cam surface 22A is rotatably provided integrally with the holder shaft 21 at the right end shown in FIG. 2 of the holder shaft 21, and the blade edge plate 14 biased by the springs 17 and 18 is provided. The contact surfaces 19A, 20A of the 15 contact members 19, 20 are always in contact with the cam surface 22A of the cam 22. As shown in FIG. 4, the cam 22 has an elliptical shape when viewed from the front, and when the holder 40 is in a vertical cutting position perpendicular to the upper surface of the turntable 12, the longitudinal direction thereof is oriented in the vertical direction. Is configured to do. 22 A of cam surfaces are comprised by the surrounding surface of the cam 22 which prescribes | regulates an ellipse shape. The cam 22 and the contact members 19 and 20 correspond to a tilting interlock mechanism.

  As shown in FIG. 3, stopper bolts 23 and 24, which are angle adjusting members, are screwed in the vertical direction so as to be positioned on the movement trajectory of stoppers 40a and 40b described later, as shown in FIG. It has been. Further, as shown in FIG. 2, the rear portion of the turntable 12 is provided with a standing portion 12A standing upward from the turntable 12, and a through hole 12h is formed in the standing portion 12A. Yes. A pin 25 that serves as a positioning member when the holder 40 is perpendicular to the upper surface of the turntable 12 is disposed in the through hole 12h so as to be movable in the horizontal direction.

  Further, as shown in FIG. 3, a substantially arc-shaped elongated hole 12 i centering on the holder shaft 21 is formed in the standing portion 12A. A clamp lever 26 (FIG. 2) passes through the long hole 12i, and a screw portion (not shown) provided at the tip of the clamp lever 26 is screwed into a screw hole portion formed on the back surface of the holder 40. When the clamp lever 26 is loosened, the holder 40 can be tilted within a range in which the clamp lever 26 can relatively move within the range of the long hole 12i with the holder shaft 21 as a fulcrum. When the clamp lever 26 is tightened when the holder 40 is inclined at an arbitrary angle, the standing portion 12A of the turntable 12 is tightened between the clamp lever 26 and the holder 40, and the holder 40 is fixed so as not to tilt. . The long hole 12i is formed within a range in which the holder 40 can tilt about 45 degrees to the left and right from a state perpendicular to the upper surface of the turntable 12.

  A shaft 41 oriented in a direction perpendicular to the extending direction of the holder 40 from the lower end of the holder 40 toward the upper end is provided at the upper end of the holder 40. The cutting part 30 is configured to be swingable up and down with respect to the upper surface of the base 11 by supporting one end of the cutting part 30 by the shaft 41. Between the holder 40 and the cutting part 30, a spring 42 for biasing the cutting part 30 upward is provided. Further, a stopper receiving portion 43 extending rightward in FIG. 2 is provided at the upper end portion of the holder 40.

  As shown in FIG. 3, stoppers 40a and 40b that serve as positioning members at the time of tilting are provided on the front surface of the holder 40. When the holder 40 is tilted, the stopper 40a is turned at a predetermined tilting angle. It abuts against the head of the stopper bolt 23 at the upper rear of the table 12 and restricts the tilting of the cutting portion 30 so as not to tilt any further. When the holder 40 is tilted to the opposite side, the stopper 40b comes into contact with the head of the stopper bolt 24 on the rear surface of the turntable 12 at a predetermined tilt angle, and the cutting portion 30 is tilted so as not to tilt further. regulate. The stopper bolt 23 comes into contact with the stopper 40a when the holder 40 is tilted 45 degrees to the left. Further, the stopper bolt 24 comes into contact with the stopper 40b when the holder 40 is inclined to the position of 45 degrees in the right direction. The above-mentioned “predetermined inclination angle” means 45 degrees.

  In addition, the stopper bolt 44 is directed to the holder 40 in the direction perpendicular to the moving direction of the pin 25 so as to be positioned on the moving locus of the pin 25 of the turntable 12 when the holder 40 tilts. It is provided by screwing. When the holder 40 is in a right-angle cutting position as shown in FIG. 3, the tip of the stopper bolt 44 comes into contact with the outer diameter portion of the pin 25 so that the holder 40 is perpendicular to the upper surface of the turntable 12. It is comprised so that it can be in a state.

  The cutting unit 30 includes a cutting unit casing 31, a motor 32, a handle 33, and a circular saw blade 34. About half or more of the circular saw blade 34 is covered with a cutting portion casing 31, and the circular saw blade shaft 34A of the circular saw blade 34 is supported by the cutting portion casing 31 as shown in FIG. Thus, the circular saw blade 34 is rotatably supported by the cutting portion casing 31. The motor 32 is provided in the cutting part casing 31 at the upper part of the cutting part 30, and is configured to be driven by pressing a switch 33A provided on a handle 33 described later. The motor 32 is drivingly connected to a circular saw blade shaft 34A as shown in FIG. In addition, the handle 33 is provided on the upper portion of the cutting unit 30, and the handle 33 is provided with a switch 33 </ b> A. Further, the cutting part 30 is provided with a stopper bolt 35. The cutting part 30 swings downward, and the stopper bolt 35 abuts against the stopper receiving part 43 of the holder 40, whereby the downward swinging of the cutting part 30 can be restricted.

  When the cutting member 30 of the tabletop cutting machine 1 is set to the vertical cutting position and the workpiece 2 is cut, the tip of the stopper bolt 44 is first brought into contact with the outer diameter portion of the pin 25, and the holder 40 and the cutting portion 30 is set perpendicular to the upper surface of the turntable 12, the clamp lever 26 is tightened, and the inclined position of the holder 40 is fixed. At this time, as shown in FIG. 4, the cam 22 is oriented in the vertical direction in the longitudinal direction, and the contact surfaces 19 </ b> A and 20 </ b> A of the pair of contact members 19 and 20 that are in contact with the cam surface 22 </ b> A are springs 17. The blade edge plates 14 and 15 are automatically positioned closest to each other. Therefore, the opening width of the opening portion of the groove 12a defined by the pair of blade edge plates 14 and 15 that move integrally with the contact members 19 and 20 is the narrowest state. It is the thickness.

  Next, when the switch 32A provided on the handle 33 is pressed to drive the motor 32 to cut the processed member 2, the circular saw blade 34 rotates about the circular saw blade shaft 34A. In this state, the handle 33 is gripped and the cutting portion 30 is pushed down and swung against the urging force of the spring 42 to cut the processing member 2.

  When the circular saw blade 34 cuts the workpiece 2 and the circular saw blade 34 enters between the blade edge plates 14 and 15 in the groove 12a of the turntable 12, the opening width of the opening of the groove 12a. 4 are automatically located immediately next to the circular saw blade 34, as shown in FIG. For this reason, the trouble of moving the blade edge plates 14 and 15 to the immediate side of the circular saw blade 34 by manually moving the blade edge plates 14 and 15 to adjust the opening width of the groove 12a can be saved. In addition, it is possible to prevent as much as possible the occurrence of burrs and edging at the edge generated by cutting the processed member 2 with the circular saw blade 34. As a result, the finish of the processed member 2 can be improved and cutting can be easily performed. When the cutting part 30 is lifted when the cutting of the processed member 2 is completed, it returns to the original upper limit position by the urging force of the spring 42.

  When the cutting portion 30 is tilted left and right, first, the clamp lever 26 is loosened to release the state in which the tilt angle of the holder 40 is fixed, and the holder 40 can be tilted (tilted) in the left or right direction. State. When the holder 40 is tilted, the cam 22 of the holder shaft 21 rotates integrally with the holder 40, and the longitudinal direction of the substantially elliptical cam 22 coincides with the tilt angle of the holder 40 as shown in FIG. It becomes an inclination angle.

  Accordingly, the cam surface 22A of the cam 22 presses the contact surfaces 19A and 20A of the contact members 19 and 20 in the left-right direction in FIG. 5, and the blade edge plates 14 and 15 are integrated with the contact members 19 and 20. Is moved outward along the guide grooves 12b and 12c (FIG. 1) of the turntable 12 against the urging force of the springs 17 and 18, that is, in the left-right direction in FIG. As a result, as shown in FIG. 5, the opening width of the opening portion of the groove 12a defined by the blade edge plates 14 and 15 is parallel to the upper surface of the turntable of the circular saw blade 34 entering obliquely into the groove 12a. Automatically expands to a width substantially the same as the width of the opening of the direction groove 12a.

  Therefore, as described above, the tabletop cutting machine 1 includes the right angle cutting at the right angle cutting position, the angle cutting that performs the cutting by inclining the holder 40 and the cutting portion 30 at a predetermined angle with respect to the right angle cutting position, and the right angle cutting. It is possible to perform combined cutting combining the above cutting method and the inclined cutting method.

  The tabletop cutting machine according to the present invention is not limited to the above-described embodiments, and various modifications and improvements can be made within the scope described in the claims. For example, in the above-described embodiment, the holder 40 and the cutting unit 30 are inclined at a predetermined angle in the left-right direction with respect to the right-angle cutting position as a reference. It is good also as a structure which can incline only to a direction.

  Moreover, although it was set as the structure which provided the blade edge | plates 14 and 15 as a pair, it does not need to be a pair. Further, although the springs 17 and 18 are used as the urging members, the present invention is not limited to the springs 17 and 18.

The top view which shows the base part of the tabletop cutting machine by embodiment of this invention. The side view which shows the tabletop cutting machine by embodiment of this invention. The front view which shows the desktop cutting machine by embodiment of this invention. The principal part sectional drawing which shows the blade edge plate and cam of the tabletop cutting machine by embodiment of this invention. The principal part sectional drawing which shows the blade edge plate and cam of the tabletop cutting machine by embodiment of this invention. The side view which shows the conventional desktop cutting machine. Sectional drawing which shows the principal part which shows the blade edge | plate plate of the conventional desktop cutting machine. Sectional drawing which shows the principal part which shows the blade edge | plate plate of the conventional desktop cutting machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Desktop cutting machine 2 ... Working member 10 ... Base part 14,15 ... Blade plate 17,18 ... Spring 19,20 ... Abutting member 19A, 20A ... Contact surface 22 ... Cam 30 ... Cutting part 34 ... Circular saw blade 40 ... Holder

Claims (3)

A cutting part that rotatably supports the cutting blade and can swing in the vertical direction;
A base portion formed with a groove capable of supporting a processing member and allowing the cutting blade to enter when the cutting portion swings downward;
A holder that stands upright at the rear part of the base part so as to be inclined with respect to the upper surface of the base part, and supports the cutting part so as to swing up and down with respect to the upper surface of the base part;
A blade opening plate provided in the groove and movable in the thickness direction of the cutting blade;
A cam supported by the holder that always rotates integrally with the tilting of the holder and a contact surface that is supported by the blade plate and can always contact the cam. A tilting interlocking mechanism having a contact member that is movable integrally;
The tilting interlocking mechanism is provided between the holder and the blade plate, and changes the opening width of the groove as the holder tilts. A pair of blade edge plates are provided on both sides of the groove opening in the width direction of the groove, extending along the groove and parallel to the upper surface of the base portion, and the pair of blade edge plates are formed on the upper surface of the base portion. Parallel to the width direction and symmetrically movable in the width direction,
2. The tabletop cutting machine according to claim 1, wherein the tilt interlocking mechanism is configured such that the cam presses the corresponding contact surface to increase the opening width as the tilt angle of the holder increases. The tabletop cutting machine according to claim 1 or 2 , wherein the tilting interlocking mechanism has a biasing means for biasing the blade edge plate so that the blade edge plate is always in contact with the cam.

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