JP2010005750A - Desktop cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a desktop cutter having a guard adjusting mechanism eliminating a time and labor for adjusting a guard position when the cutting angle of a cutting object is changed by the rotation of a turn table. <P>SOLUTION: In the desktop cutter, a guard 12 slidable in conjunction with the rotation of the turn table 3 is provided on a holder 8 side, and the tip of a guard 12a is prevented from projecting into a side handle 15 side from an abutting surface 11a of a fence 11 by the slide of a shaft 24 of the guard 12 while abutting on a cam 26. Also, a screw 22 and a plate 23 for adjusting an energizing force of a spring 19 energizing the guard 12a are provided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tabletop cutting machine, and more particularly to a guard position adjusting mechanism for a tabletop cutting machine.

  A conventional tabletop cutting machine will be described with reference to FIGS. First, the configuration of the tabletop cutting machine will be described with reference to FIGS. The tabletop cutting machine 1 includes a base 2 composed of a base 2 on which a workpiece 16 is placed and a turntable 3 embedded substantially at the center of the base 2, and the rotation of a motor 9 is transmitted around a rotating shaft 5. A saw blade part 6 that rotatably supports the saw blade 4, a holder 8 that is connected to the base part and supports the saw blade part 6 so that it can swing around a swing shaft 7, and a workpiece 16 together with the base part. A fence 11 for guiding, and a guard 12 for guiding the cut chips 16 to the discharge port 17 and guiding the workpiece 16 together with the fence 11 are provided. The saw blade 6 is normally biased upward by a spring 10 with the swing shaft 7 as a fulcrum (state shown in FIG. 8).

  In the tabletop cutting machine 1 having the above-described configuration, when performing a cutting operation, an operator grasps the cutting handle 13 and swings the saw blade portion 6 downward with the swing shaft 7 as a fulcrum. Since the saw blade 4 swings to the position of the saw blade 4b in FIG. 8, the workpiece 16 supported by the base portion and the fence 11 can be cut. Further, when the saw blade 4 is cut at a predetermined angle with respect to the base portion (inclined cutting), the holder 8 and the saw blade portion 6 can be inclined with the inclined shaft 14 as a fulcrum, and inclined cutting is possible. It has become. Further, when the turntable 3 is rotated by a predetermined angle to be cut (rotation cutting), the turntable 3 can be rotated from the state of FIG. Cutting is possible.

  The normal state in which the inclined cutting and the rotational cutting are not performed is the state shown in FIGS. In the case of performing rotational cutting from this state, the side handle 15 is loosened, the fixed state between the base 2 and the turntable 3 is released, and the turntable 3 is rotated in the horizontal direction. Since the saw blade portion 6 holding the saw blade 4 is connected to the turntable 3 via the holder 8, the saw blade portion 6 also moves in conjunction with the rotation of the turn table 3 and moves to a desired rotation position. Match. When the desired rotational position is reached, the side handle 15 is tightened to fix the turntable 3 and the base 2 (FIG. 11).

  Here, a guard 12 is provided in order to prevent damage to parts such as a case where a cut piece after cutting the workpiece 16 is scattered to the rear of the tabletop cutting machine 1 or entangled in the main body of the tabletop cutting machine 1. ing.

  As shown in FIG. 11, when turning and cutting, the guard 12 protrudes from the contact surface of the fence 11 as the turntable 3 rotates, and it becomes difficult to support the workpiece 16. End up. Therefore, it is necessary to adjust the guard 12 such as loosening the knob 18 of the fence 11, sliding the guard 12 to contact the workpiece 16, and tightening the knob 18 to fix the guard 12.

  When the state of right-angle cutting in FIG. 10 is changed to the rotation cutting (rotation angle F °) in FIG. 11, the tip of the guard 12 protrudes from the contact surface of the fence 11 by the distance A. It is necessary to adjust the position to the contact surface of the fence 11. That is, it is necessary to manually adjust the guard 12 so as to be substantially flush with the contact surface of the fence 11 every time the rotation angle is changed.

JP 2007-190710 A

  When the position of the guard 12 is adjusted with the conventional tabletop cutting machine 1, the cut pieces after cutting the workpiece 16 are scattered to the rear of the tabletop cutting machine 1 or wound into the main body of the tabletop cutting machine 1. In order to eliminate the damage of these parts, the knob 18 must be loosened, the guard 12 is slid and brought into contact with the workpiece 16, and the knob 18 is tightened to fix the guard 12. That is, when the cutting angle (rotation angle) is changed again after the position of the guard 12 is adjusted, it is necessary to manually adjust the position of the guard 12 to the contact surface of the fence 11 each time. The performance and work efficiency were poor.

  It is an object of the present invention to save time and improve the efficiency of cutting work by interlocking the position adjustment of the guard with the rotation of the turntable in the horizontal direction.

  An object of the present invention is to provide a tabletop cutting machine that eliminates the above-described drawbacks, can easily adjust the position of a guard, and can improve operability and work efficiency.

  In order to solve the above-described problems, the present invention provides a base portion having a base for supporting a workpiece, a turntable embedded in the base so as to be horizontally rotatable, and supporting the workpiece provided on the base portion. A fence having a contact surface that comes into contact with the workpiece, a saw blade portion that supports a saw blade that rotates with a rotation shaft as a fulcrum, and swings the saw blade portion above the base portion with a swing shaft as a fulcrum. In a tabletop cutting machine comprising a holder that is movably supported and a guard portion that is provided on the holder and supports the workpiece together with the fence, the guard portion is interlocked with the horizontal rotation of the turntable. A guard that slides against the contact surface of the fence is provided.

  By adopting such a configuration, the guard part slides back and forth with respect to the fence in conjunction with the turntable rotation, so that the operability and workability can be improved without troublesome adjustment of the guard part. The workpiece can be reliably guided.

  The guard portion includes a guard adjustment mechanism that operates in conjunction with the rotation of the turntable. The guard adjustment mechanism is connected to the cam member provided on the base and the guard. A shaft portion may be provided that slides in contact with the cam member in conjunction with the rotation.

  With such a configuration, the guard portion can be adjusted with a simple configuration. Further, since the shaft portion contacts and slides on the cam member in conjunction with the rotation of the turntable, the guard portion can be adjusted reliably.

  The cam member may have a substantially arc shape, and the cam member may have a thickness that increases toward both ends.

  With such a configuration, when the turntable is largely rotated, the amount of movement of the shaft portion in the front-rear direction is increased, so that the guard portion can be adjusted reliably.

  The guard portion has a pressure adjusting mechanism for adjusting the amount of pressure applied to the guard, and the pressure adjusting mechanism has an end abutting against the guard and biasing the guard portion toward the fence. You may provide the bias member, the plate member contact | abutted with the other end of this bias member, and the screw member which is provided in the said holder and presses this plate member to the said fence side.

  With such a configuration, when the urging force of the urging member is reduced by repeatedly adjusting the guard portion, the urging force of the urging member can be adjusted, and the guard adjustment can be reliably performed. .

  According to the present invention, since the guard portion that slides backward with respect to the fence surface in conjunction with the rotation of the turntable in the horizontal direction is provided, the trouble of adjusting the guard portion can be saved, and the operability and cutting Work efficiency can be improved.

  Moreover, since the guard part has a guard adjusting mechanism, the guard can be reliably adjusted with a simple configuration.

  In addition, since the guard portion has a pressing adjustment mechanism, even when the urging force of the urging member becomes weak due to repeated adjustment in the front-rear direction of the guard, the urging force of the urging member can be adjusted and the guard can be adjusted reliably. It can be carried out.

  In addition, since the guard is always urged to the fence side by the urging member, the guard automatically moves in the front-rear direction when the shaft portion slides in contact with the cam portion in conjunction with the rotation of the turntable. The position of the guard can be adjusted easily.

  An embodiment of the present invention will be described with reference to FIGS. 1 is a left side view of a tabletop cutting machine, FIG. 2 is a front view of FIG. 1, FIG. 3 is a sectional view taken along line HH in FIG. 2, FIG. 4 is a sectional view taken along line AA in FIG. FIG. 6 is a view showing the guard part when cutting at a right angle in FIG. 2, FIG. 6 is a view showing the guard part when the turntable is turned by an angle Y, and FIG. 7 is a view showing the guard part when the turntable is turned by an angle Y. FIG.

  First, the configuration of the tabletop cutting machine will be described with reference to FIGS. 1 and 2. In addition, the same code | symbol is attached | subjected to the site | part which has the same function as the conventional desk-top cutting machine. The tabletop cutting machine 1 includes a base 2 composed of a base 2 for placing a workpiece 16 and a turntable 3 embedded in the approximate center of the base 2, and a cutting handle 13. The rotation of the handle motor 9 is transmitted. A saw blade 6 that rotatably supports the saw blade 4 around the rotation shaft 5, and a turntable 3 connected to the base portion, particularly the rear portion of the turntable 3, and the saw blade 6 around the swing shaft 7. A holder 8 that is supported so as to be able to swing, a fence 11 that guides the workpiece 16 together with the base portion, and guides cutting material 16 that has been cut to the discharge port 17 and guides the workpiece 16 together with the fence 11. The guard part 12 to be provided. Note that the saw blade portion 6 is normally biased to an upper position by a spring 10 with the swing shaft 7 as a fulcrum as shown in FIGS. 1 and 2.

  The guard portion 12 is provided on the holder 8, is substantially orthogonal to the swing shaft 7 of the saw blade portion 6, and is in contact with the work material contact surface of the fence 11 in conjunction with the rotation of the turntable 3 in the horizontal direction. 11a is slidable on the holder 8 side.

  In the tabletop cutting machine 1 having the above-described configuration, when performing a cutting operation, the operator holds the cutting handle 13 and turns on a switch (not shown) so that the saw blade portion 6 is moved downward with the swing shaft 7 as a fulcrum. Rocks. Since the saw blade 4 swings from the position of the saw blade 4a in FIG. 1 to the position of the saw blade 4b, the rotation of the motor 9 is transmitted to the saw blade 4 via the speed reduction mechanism and supported by the base portion and the fence 11. The workpiece 16 can be cut. Further, when the saw blade 4 is cut at a predetermined angle with respect to the base portion (inclined cutting), the holder 8 and the saw blade portion 6 can be inclined with the inclined shaft 14 as a fulcrum, and inclined cutting is possible. It has become. Further, when the turntable 3 is rotated by a predetermined angle to be cut (rotational cutting), the side handle 15 provided on the turntable 3 can be rotated right and left by a predetermined angle from the state of FIG. And as shown in FIG. 7, rotation cutting is possible. In this inclined cutting and rotational cutting, the cutting operation can be performed by the same procedure as the right-angle cutting.

  Next, a turning method of the turntable when turning and cutting will be described. In a normal state in which the inclined cutting and the rotation cutting are not performed (right-angle cutting), the state shown in FIGS. In the case of performing rotational cutting from this state, the side handle 15 is loosened, the fixed state between the base 2 and the turntable 3 is released, and the turntable 3 is rotated in the horizontal direction. Since the saw blade portion 6 holding the saw blade 4 is connected to the turntable 3 via the holder 8, the saw blade portion 6 also moves in conjunction with the rotation of the turn table 3 and moves to a desired rotation position. Match. When the desired rotational position is reached, as shown in FIGS. 6 and 7, the side handle 15 is tightened to fix the turntable 3 and the base 2, thereby enabling rotational cutting. In addition, since the fence 11 is provided in the base 1, it does not move in conjunction with the rotation of the turntable 3, and can stably support the workpiece 16 even when it is set to an arbitrary rotation angle. .

  Next, the guard part of this invention is demonstrated using FIG. 3 thru | or FIG. As shown in FIG. 1 and FIG. 2, the cut pieces after cutting the workpiece 16 are scattered to the rear of the tabletop cutting machine 1 or the parts are not damaged when they are caught in the body of the tabletop cutting machine 1. Therefore, a guard portion 12 is provided on a holder 8 positioned between a pair of fences 11 provided with the saw blade 4 interposed therebetween.

  As shown in FIG. 3, the guard portion 12 is configured to be slidable in the front-rear direction (left-right direction in FIG. 3) in conjunction with the rotation of the turntable 3. The guard unit 12 includes a guard 12a that supports the workpiece 16 together with the fence 11, and a spring 19 that serves as a biasing member that biases the guard 12a toward the fence 11 side. One end side of the spring 19 is inserted into a guard hole 20 provided on the side opposite to the fence of the guard 12 a, and the other end side is inserted into a holder hole 21 provided in the holder 8. The guard 12a is always pressed (biased) toward the fence 11 by the spring 19. The urging member may not be a spring. When the turntable 3 is rotated, the guard 12a is retracted to the holder 8 side. When the turntable 3 is in the vertical cutting position (FIG. 5), the guard 12a is moved to the fence 11. Anything that biases to the side may be used.

  Further, a plate 23 is provided in the holder hole 21 on the other end side of the spring 19 so that the tip of the screw 22 screwed into the holder abuts and the other end of the spring 19 is pressed against the fence 11 side. It has been. When the position of the guard 12a is frequently adjusted and the urging force of the spring 19 decreases, the screw 22 is turned and the plate 23 is slid toward the fence 11 in the holder hole 21 so that the spring 19 is moved toward the guard 12a. The pressure amount, that is, the urging force of the spring 19 can be secured, and the position of the guard 12a can be adjusted.

  Further, the guard 12a is provided with a shaft 24 which is a shaft part extending substantially perpendicular to the sliding direction of the guard 12a and extending toward the base part, and is provided integrally with or separate from the guard part 12a. The position of the guard 12a can be adjusted by contacting the part 26 and sliding in conjunction with the rotation of the turntable 3. The shaft 24 is slidable in a long hole 27 provided in the turntable 3.

  As shown in FIGS. 3 and 4, the guard 12 a is slid in the front-rear direction (the left-right direction in FIG. 3) in association with the turning angle of the turntable 3 in the horizontal direction. A cam portion 26 that contacts the shaft 24 is fixed by a screw 25 to be moved. As shown in FIG. 5, the cam portion 26 abuts on the shaft 24, and the shaft 24 slides in conjunction with the rotation of the turntable 3 along the circumferential portion of the cam portion 26.

  Next, the position adjustment of the guard part 12 will be described with reference to FIGS. First, consider the case where the turntable 3 is at the position shown in FIG. In this case, the tip of the guard 12 a of the guard portion 12 is positioned substantially flush with the contact surface 11 a of the fence 11. In this state, the shaft 24 is positioned at B shown in FIG. 4 and is in contact with the thin portion of the cam portion 26. From this state, as shown in FIG. 6, the turntable 3 is rotated about the rotation angle Y °, for example, 30 ° with respect to the base 2 with the rotation shaft 28 as a fulcrum. Conventionally, in this state, the tip of the guard 12a protrudes from the abutment surface 11a of the fence 11 toward the side handle 15, so that it is necessary to adjust the guard 12a by a knob operation. In the present invention, since the guard 12a is automatically adjusted in conjunction with the rotation of the turntable 3, labor can be saved and operability and work efficiency can be improved. That is, as shown in FIG. 4, in the state of FIG. 6, the shaft 24 is at the position C, and the shaft 24 slides along the outer periphery of the cam portion 26 closer to the end than the central portion of the cam portion 26. Since the position C of the portion 26 is thicker than the central portion B of the cam portion, the shaft 24 moves away from the rotating shaft 28 against the urging force of the spring 19, that is, in the holder 8 side. Become. Therefore, the tip of the guard 12a does not protrude from the contact surface 11a of the fence 11, and the workpiece 16 can be reliably guarded.

  Further, the turntable 3 is rotated from the state of FIG. 6 to the state of FIG. 7 by a rotation angle X °, for example, 45 °. In this case, as shown in FIG. 4, the shaft 24 further moves to the position D along the outer periphery of the cam portion 26. Since the cam portion 26 at the position D has a larger thickness than the position D, the guard 12a slides further toward the holder 8 side. Therefore, the tip of the guard 12a does not protrude from the contact surface 11a of the fence 11, and the workpiece 16 can be reliably guarded.

  That is, since the guard 12a is always urged to the fence 11 side by the spring 19 which is an urging member, the shaft 24 corresponds to the rotation angle in conjunction with the rotation of the turntable 3. And it can slide to the holder 8 side or the fence 11 side automatically depending on the contact position of the cam portion 26. Therefore, the labor for adjusting the guard 12a can be saved, and the operability and work efficiency can be improved.

  In this embodiment, the shaft is provided on the guard portion side and the cam portion is provided on the base side. However, the arrangement of the shaft and the cam portion may be reversed, and the turntable is rotated instead of the cam shape. As long as the guard part moves in conjunction with the movement.

  Further, in the present embodiment, the configuration in which the guard is moved back and forth (biased toward the fence side or retracted from the fence side) in conjunction with the rotation of the turntable by providing the biasing member has been described. It may be configured to move the guard backward in conjunction with the rotation of the. Moreover, the structure which does not provide an urging member may be sufficient. That is, the guard may be configured not to protrude forward from the contact surface of the fence regardless of the turning angle of the turntable. For example, in the case of right-angle cutting, the guard position is adjusted so as to be substantially flush with the abutment surface of the fence, and the guard retreats in conjunction with the rotation of the turntable and moves forward from the abutment surface of the guard. It can also be configured not to protrude. In this case, when returning to right-angle cutting, the guard may be manually returned to be substantially flush with the contact surface of the fence when necessary. Since the guard can be returned only by abutting the abutting portion (corresponding to the cam portion in the above embodiment) on the fence side, it can be performed without taking time and effort.

It is a left view of the tabletop cutting machine which shows embodiment of this invention. It is a front view of FIG. It is HH sectional drawing of FIG. It is AA sectional drawing of FIG. It is a figure of the base part and guard part which show the right-angle cutting state of embodiment of this invention. It is a figure of the base part and guard part which show the state of the rotation angle Y of embodiment of this invention. It is a figure of the base part and guard part which show the state of the rotation angle X of embodiment of this invention. It is a left view which shows the conventional desktop cutting machine. It is a front view of FIG. It is the figure after the guard position adjustment which shows the right-angle cutting state of the conventional desktop cutting machine. It is a figure before guard position adjustment which shows the state of the rotation angle X of the conventional desk top cutter.

Explanation of symbols

1 is a tabletop cutting machine, 2 is a base, 3 is a turntable, 4 is a saw blade, 5 is a rotary shaft, 6 is a saw blade, 7 is a rocking shaft, 8 is a holder, 9 is a motor, 10 is a spring, 11 Is a fence, 12 is a guard part, 13 is a cutting handle, 14 is a tilting shaft, 15 is a side handle, 16 is a workpiece, 17 is a discharge port, 18 is a knob, 19 is a spring, 20 is a guard hole, and 21 is The holder hole, 22 is a screw, 23 is a plate, 24 is a shaft, 225 is a screw, 26 is a cam portion, 27 is a hole for a shaft, and 28 is a rotation shaft.

Claims (4)

A base portion having a base for supporting the workpiece and a turntable embedded in the base so as to be horizontally rotatable, and a contact surface provided on the base portion for supporting the workpiece and contacting the workpiece. A fence having a saw blade portion that supports a saw blade that rotates about a rotating shaft as a fulcrum, a holder that supports the saw blade portion above the base portion so that it can swing around a swing shaft, and In a tabletop cutting machine provided with a guard portion that supports the workpiece together with the fence,
The tabletop cutting machine, wherein the guard portion includes a guard that moves to the holder side with respect to the contact surface of the fence in conjunction with horizontal rotation of the turntable.   The guard portion includes a guard adjustment mechanism that operates in conjunction with the rotation of the turntable, and the guard adjustment mechanism is connected to the cam member provided on the base and the guard to rotate the turntable. The tabletop cutting machine according to claim 1, further comprising a shaft portion that slides in contact with the cam member in conjunction with the cam.   3. The tabletop cutting machine according to claim 2, wherein the cam member has a substantially arc shape, and the thickness of the cam member increases toward both end portions. The guard part has a pressing adjustment mechanism for adjusting the pressing amount to the guard,
The pressing adjustment mechanism includes a biasing member having one end in contact with the guard and biasing the guard portion toward the fence, a plate member in contact with the other end of the biasing member, and the plate provided on the holder. The tabletop cutting machine according to any one of claims 1 to 3, further comprising a screw member that presses the member toward the fence.

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