JP2007090775A - Desktop cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the productivity and the operability of a desktop cutter and to provide an angle index device of the desktop cutter which is accurate for a long period of time. <P>SOLUTION: The engaging portion 16 forming at least one engaging place of an engaging means is made movable and the engaging portion 16 can select ON/OFF of the function of engaging a turntable 2. Further, the engaging portion 16 forming at least one engaging place of the engaging means is movable along a turning direction of the turntable 2 and can be fixed at a moving position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tabletop cutting machine having a turntable angle index device.

  A tabletop cutting machine is a machine that mainly cuts wood or the like at a predetermined angle, and the cutting angle is set according to an angle scale provided on the base. However, in order to improve workability, a frequently used angle (for example, 0, 15) is used. 22.5, 30, 45 degrees, etc.) is provided with an angle index device so that the turntable stops rotating.

  As disclosed in Patent Document 1, in the conventional index system, the convex portion of the plate attached to the turntable is fitted and locked to the concave portion provided on the outer periphery of the base, or Patent Literature 2 The lock pin tip attached to the turntable is fitted and locked in the lock hole provided on the outer periphery of the base as disclosed in Japanese Patent No. There is a steel ball fitted and locked in a V-groove portion provided in. In any of the documents, the locking portion is integrally machined on the base or formed by a mold.

  The above-mentioned frequently used angle varies depending on the country and region where the product is used. For example, it is 0, 15, 22.5, 30, 45 degrees in Japan, but 0, 15, 22.5, 31.6, 45 degrees in the United States. There was a difference of 30 degrees and 31.6 degrees between Japan and the United States, and it was necessary to prepare a turntable or base depending on the shipping destination.

JP 2005-111855 A JP-A-9-13625 JP-A-11-226905

  The above-described conventional angle indexing device in the tabletop cutting machine has poor productivity because it is necessary to prepare parts for each destination having different locking angles.

  In addition, since adjustment cannot be performed after assembly, there is a problem that the index angle does not become accurate due to variations in parts and wear of parts due to long-term use. Therefore, in order to make the index angle after assembly accurate, it is necessary to improve the position accuracy at the component stage.

  An object of the present invention is to provide a tabletop cutting machine that eliminates the above-mentioned drawbacks of the prior art and is excellent in productivity or workability.

  The above object is achieved by making the locking portion forming at least one locking point of the locking means movable so that the locking portion can select on / off of the function of locking the turntable. The

  Further, this is achieved by enabling the locking portion forming at least one locking location of the locking means to be movable along the turning direction of the turntable and to be fixed at the moving position.

  According to the present invention, the locking portion forming at least one locking portion of the locking means is movable, and the locking portion can select on / off of the function of locking the turntable. For example, it is possible to change to the specification of a part suitable for the shipping destination. Also, if you want to work with a slight shift from the index angle, and if it is difficult to work when there is an index, turn the locking function off to improve workability. It becomes possible to make the specification according to the preference of the worker.

  By enabling the locking part forming at least one locking point of the locking means to move along the turning direction of the turntable and to be fixed at the moving position, the index angle can be adjusted, and the position The accuracy can be improved, or the specification can be adapted to the preference of the operator and the shipping destination.

  An embodiment of the tabletop cutting machine of the present invention will be described below with reference to FIGS.

  In the figure, a turntable 2 is embedded in the center of the base 1 so as to be able to rotate 45 degrees or more in the horizontal direction, and the upper surface of the turntable 2 is flush with the upper surface of the base 1. A material 3 to be cut such as wood is placed on the upper surfaces of the base 1 and the turntable 2. A fence 4 having a support surface 4 a that supports the side surface of the material 3 to be cut is fixed to the upper surface of the base 1. A holder 6 is erected at the rear end of the turntable 2 via a holder shaft 5, and the holder 6 is positioned so that the axis of the holder shaft 5 substantially coincides with the upper surface of the turntable 2. Is pivotally supported about the upper surface of the turntable 2 with the fulcrum as a fulcrum.

  As shown in FIG. 3, a long hole 6 a centering on the holder shaft 5 is formed from the rear part of the holder 6, the clamp lever 7 is passed through the long hole 6 a, and a screw part formed at the tip of the clamp lever 7 is turned. It is screwed into a screw hole formed on the back surface of the table 2. When the clamp lever 7 is loosened, the holder 6 is tilted within the range of the long hole 6a with the holder shaft 5 as a fulcrum. It is fixed with. The long hole 6a is formed within a range in which the holder 6 can be tilted 45 degrees to the left. The projection 6c of the holder 6 is in contact with the bolt 8 attached to the turntable 2 so that the tilt range is regulated. Yes.

  A cutting blade body 10 is pivotally supported above the holder 6 via a shaft 9 so as to be swingable up and down with respect to the upper surface of the base 1. A spring 11 is provided between the holder 6 and the cutting blade body 10 to urge the cutting blade body 10 upward.

  The cutting blade body 10 includes a cutting blade shaft 12, a cutting blade 13 such as a circular saw, a blade case 14 covering the cutting blade 13, a motor (not shown) for rotationally driving the cutting blade 13, and a motor housing (not shown). It is comprised with the handle | steering-wheel 15 attached to (not).

  The structure of the locking means constituting the present invention will be described with reference to FIGS.

  In the present embodiment, the locking means of the present invention includes a stop piece 16 that is a locking portion attached to the base 1 and a spring plate 17 attached to the turntable 2.

  As is clear from FIGS. 1 and 4, the base 1 is provided with a plurality of stop pieces 16.

  The stop piece 16 has the shape shown in FIGS. 7 and 8, and has a recess 16a with which the protrusion 17a of the spring plate 17 attached to the turntable 2 engages, and the opposite side of the recess 16a is attached to the base 1 7 has a flat portion 16b that contacts the guide surface 1a, and is long in the direction parallel to the flat portion 16b at the center of the stop piece 16. As shown in FIG. 8, the stop piece 16 in FIG. The slot 16c is provided so that the stop piece 16 can be attached even if it abuts against one guide surface 1a.

Further, the stop piece 16 is provided with a screw hole 16d penetrating the elongated hole 16c, and a push screw 19 for pressing a stepped bolt 18 described later is disposed on both sides of the elongated hole 16c. Yes.
In the present embodiment, the fixing means of the present invention includes a stepped bolt 18 and a push screw 19.

  Further, the base mounting surface 16 e of the stop piece 16 has the same R shape as the outer peripheral surface 1 b of the base 1.

  The stop piece 16 is attached to the outer peripheral surface 1 b of the base 1 by pressing the stop piece 16 with a stepped bolt 18 via an elastic member 20 such as a spring and a washer 21. Further, since the stop piece 16 has a gap in the horizontal direction with respect to the stepped bolt 18, the stoppiece 16 can move along the guide surface 1 a of the base 1, and this movement is performed by the push screws 19 provided on both sides of the stepped bolt 18. It can be done by operation.

  Further, since the spring plate 17 is attached by pressing the convex portion 17a upward in the drawing by its own elastic force, the convex portion 17a of the spring plate 17 automatically moves to the concave portion 16a of the stop piece 16 during positioning. Engage with. When rotating the turntable 2, the spring plate 17 is pushed down to release the convex portion 17 a of the spring plate 17 from the concave portion 16 a of the stop piece 16. In the present invention, the “convex portion provided so as to rotate integrally with the turntable relative to the base” is the spring plate 17 and the convex portion 17a.

  Further, the side handle 22 provided in front of the turntable 2 is used when the turntable 2 is rotated, and the turntable 2 can be fixed by rotating the side handle 22 after the rotating operation.

  Further, digital display means 23 for displaying the rotation angle of the turntable 2 by a rotation angle detection means, an angle calculation control means, etc. (not shown) is provided in front of the turntable 2.

  In the above configuration, the turntable 2 is rotated, and the convex portion 17a of the spring plate 17 is fitted into the concave portion 16a of the stop piece 16 previously attached to the base 1. A plurality of stop pieces 16 are attached in the vicinity of frequently used angles (for example, 0, 15, 22.5, 30, 45 degrees, etc.). In this state, the angle between the support surface 4a of the fence 4 and the cutting blade 10 is measured with an angle ruler or the like, the push screw 19 is operated so that the measured value becomes a predetermined angle, and the stop piece 16 is moved to an accurate position. Let By performing the above operation, a highly accurate angle index device can be obtained.

Although not described in detail in the present embodiment, in a product that digitally displays the angle of the turntable 2, the digital display value may differ from the index position angle due to component variations. For this reason, the display accuracy of digital display could not be increased. However, since the digital display can be corrected to an accurate value by the operation of the above-described push screw, the display accuracy of the digital display can be increased. (For example, it can be displayed in increments of 0.1 to 0.2 degrees.)
Further, for the stop piece 16 that is mounted in the vicinity of 30 degrees of the stop piece 16 that is movable along the rotation direction of the turntable 2 and can be fixed at the moving position, the length dimension of the long hole 16c is at least the turn dimension. Within a range in which the table 2 can move to a position where the rotation of the turntable 2 is restricted at a position rotated 31.6 degrees from a position where the rotation of the turntable 2 is restricted at a position rotated 30 degrees from the reference angle. By setting, it can be set to 30 degrees for products for Japan and 31.6 degrees for products for the United States, so that the parts of the base 1 can be shared and the specifications can be tailored to the user's preference. become able to.

  Further, as shown in FIG. 8, the stop piece 16 is rotated so that the concave portion 16a cannot be engaged with the convex portion 17a and the surface 16b not provided with the concave portion 16a can be brought into contact with the convex portion 17a. By positioning, the angle regulation of the turntable 2 can be selectively switched on / off according to the user's preference or work content.

  In addition, since the stop piece 16 can be attached and detached, the concave portion 16a of the stop piece 16 is worn away over a long period of use, and when the index angle changes, the stop piece 16 is replaced to return to a state with good positional accuracy. To be able to. Also, when the stop piece 16 is broken for some reason, it can be replaced with a new stop piece 16 and used again.

  Further, when the recess 16a of the stop piece 16 is worn, the stop piece 16 can be corrected again to an accurate angular position by operating the push screw 19.

  In addition, although embodiment mentioned above demonstrated by the one recessed part with respect to one stop piece, the stop piece which has several recessed part may be sufficient.

  In addition, the fixing means for fixing the stop piece 16 to the base 1 has the stepped bolt 18 and the push screw 19. However, the fixing means may be constituted only by a bolt and may have another structure. .

  Furthermore, although the stepped bolt 18 and the push screw 19 are provided as means for moving the stop piece 16, another method may be used.

  In this embodiment, the base 1 is provided with the stop piece 16 that is a locking portion. However, the turntable is rotated by providing the locking portion on the turntable and engaging the locking portion. It is good also as a structure which provided the member to regulate in a base.

  Furthermore, although it was set as the structure which provided the some stopper piece 16, it has one stopper piece and the other latching location is the offense which consists of a recessed part etc. which are integrally formed with a base or a turntable like the past. There may be.

The principal part expansion longitudinal cross-sectional view which shows one Embodiment of this invention tabletop cutting machine. The front view which shows one Embodiment of this invention tabletop cutting machine. The left side principal part enlarged view of the tabletop cutting machine shown in FIG. The principal part enlarged view of the right side surface of the tabletop cutting machine shown in FIG. The principal part enlarged view of FIG. AA line sectional view of Drawing 5. The perspective view which shows one Embodiment of the latching | locking part which comprises this invention. The perspective view which shows the state which rotated the latching | locking part shown in FIG.

Explanation of symbols

1 is a base, 2 is a turntable, 4 is a fence, 16 is a stop piece, 17 is a spring plate, 18 is a mounting bolt, 19 is a set screw, 20 is an ammunition, and 21 is a washer.

Claims (6)

A base on which a material to be cut can be placed, a fence having an abutment surface for contacting a material to be cut fixed to the base, a circular saw portion that rotatably supports a circular saw blade, and the round A support member for swingably supporting a saw portion with a swing shaft substantially parallel to the axial direction of the circular saw blade as a fulcrum, and the angle of the side surface of the circular saw blade with respect to the contact surface of the fence can be changed. In a tabletop cutting machine having a turntable embedded in a base and a locking means for locking the turntable at a plurality of positions at an arbitrary angle, a lock forming at least one locking point of the locking means A tabletop cutting machine characterized in that the section is movable, and the on / off of the function of the locking portion to lock the turntable can be selected. The tabletop cutting machine according to claim 1, wherein the on / off is switched by rotating the locking portion around a fixing means for fixing the locking portion. The tabletop cutting machine according to claim 1 or 2, wherein the locking portion is detachable. The desktop cutting machine according to any one of claims 1 to 3, wherein the locking portion is movable along a rotation direction of the turntable and can be fixed at a moving position. The locking portion restricts rotation of the turntable at a position rotated by 31.6 degrees from a position at which the turntable is rotated by 30 degrees from a reference angle. The tabletop cutting machine according to claim 4, wherein the tabletop cutting machine is movable to a position to be moved. The locking portion of the locking means is provided on the base, and includes a plurality of concave portions that can be engaged with convex portions provided integrally with the turntable so as to rotate with respect to the base. The locking portion has a shape having one surface having a recess and another surface not having a recess, and the one surface having the recess can be engaged with the convex portion so that the locking portion can be turned into the turn. The rotation of the table can be restricted, and the other part that does not have the concave part can be brought into contact with the convex part so that the locking part cannot restrict the rotation of the turntable. The tabletop cutting machine according to claim 1.

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