JP2009297869A - Motor-operated circular saw apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor-operated circular saw apparatus enabling a worker to know the cut end position of a rotary saw blade which is invisible from the worker since covered by a safety cover and capable of accurately cutting a work at a predetermined position. <P>SOLUTION: This motor-operated circular saw apparatus comprises a motor-operated round saw and a marking tool 3 for indicating the cut end position of the rotary saw blade 8. The motor-operated round saw comprises a motor 9, the rotary saw blade 8, a transmission means 7 for transmitting the rotation of the motor to the rotary saw blade 8, and a handle 6. The motor-operated round saw is integrally mounted on a support base 1. The marking tool 3 for indicating the cut end position of the rotary saw blade 8 is movably provided to the support base 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric circular saw, and an electric circular saw device that can perform a cutting operation safely and can accurately cut a workpiece before or beyond a predetermined cutting position provided on the workpiece. It is about.

  Conventionally, hand-held electric circular saws are often used for cutting wood materials such as plate materials. In recent years, in addition to the above-described cutting of wood materials, it is often used for cutting siding materials used as exterior materials.

  The siding material usually has a metal material such as an aluminum plate or a color steel plate as a surface material, and the surface material is provided with a design such as a concavo-convex pattern, a stucco-like raised pattern, an embossed pattern, a folded fold pattern, etc., and urethane foam It is formed in a panel shape by backing with a heat insulating material such as resin. Then, the siding material is cut using an electric circular saw for cutting metal.

  FIG. 6 is a perspective view showing a known electric circular saw. As shown in FIG. 6, the rotary saw blade 8 is attached to the secondary rotation shaft of the transmission means 7 via the transmission means 7 that transmits the rotation of the rotation shaft of the motor 9. The transmission means 7 is housed in a casing, and a handle 6 is connected to the casing. The operator operates the trigger switch 61 attached to the handle 6 and pushes it in the direction of the arrow shown in FIG. 6 to perform a cutting operation with the rotary saw blade 8 that rotates at high speed.

  As shown in FIG. 6, the motor 9, the rotary saw blade 8, the transmission means 7, the handle 6, and the like are integrally attached to the support base 1, and the operator places the support base 1 on the outer cut object in the figure. The cutting work is carried out. That is, the handle 6 is gripped, and the cutting position guide 4 provided at the front portion of the support base 1 is aligned with the ink line drawn on the object to be cut, and the siding material or the like is cut along the ink line. Do.

  At this time, when cutting the object to be cut into two parts, the siding material or the like may be cut off according to the black line, but when cutting a rectangular siding material from a single panel, the object to be cut It is necessary to stop the rotation of the rotary saw blade 8 at a predetermined position above, change the direction of the siding material, and perform cutting again.

  When this operation is performed manually using a conventional gold saw, it can be performed while visually confirming the cutting position. However, when an electric circular saw is used, the upper part of the rotary saw blade 8 is covered with the safety cover 51 and the lower part is guarded by the frame cover 52 and cannot be visually observed. This is done by the experience and skill of the operator. In some cases, however, the cutting is stopped before a predetermined position, or the cutting is advanced beyond the predetermined position.

  On the other hand, in Japanese Patent Application Laid-Open No. 2005-199416, a safety cover that covers the blade of the electric circular saw is divided into a main body frame cover and a lower slide frame cover, and a lower radius slide frame cover that covers the lower portion of the blade of the electric circular saw. There has been proposed an electric circular saw characterized in that a roller is provided on the surface.

And by providing a roller, lifting the lower frame cover while avoiding friction and rotating the upper side of the member to be used, it is possible to cut the member to be used with good flow, for various operations using the electric circular saw, without difficulty, And the effect is stated that the worker can work safely.
JP-A-2005-199416

  However, in the above-described known technique, the member to be used can be safely and safely cut in various operations using the electric circular saw. With respect to cutting accurately, it is not always sufficient. The present invention has been made in view of the above-described background art, and its purpose is to know the cutting tip position of a rotary saw blade that is covered with a safety cover and cannot be visually checked by an operator, and to cut an object to be cut into its predetermined cutting position. It is an object to provide an electric circular saw device that can accurately cut at a predetermined position before or without crossing.

  In order to solve the above-mentioned problems, an electric circular saw device according to the first aspect of the present invention is an electric circular saw device comprising an electric circular saw and a mark jig indicating the cutting tip position of the rotary saw blade. The electric circular saw includes a motor, a rotary saw blade, a transmission means for transmitting the rotation of the motor to the rotary saw blade, and a handle, and is integrally attached to the support base. A mark jig for indicating the cutting tip position of the blade is movably provided.

  The invention according to claim 2 of the present application is characterized in that, in the invention according to claim 1, the mark jig is detachably elastically held by a support base.

  The invention according to claim 3 of the present application is the invention according to claim 1, wherein a rising rib is provided on a side edge of the support base to form a slide rail, and a marker jig is detachably and slidable on the slide rail. It is characterized by being attached to.

  The invention according to claim 4 of the present application is characterized in that, in the invention according to claim 3, the mark jig comprises a mounting base to be attached to the slide rail and a mark portion.

  In the electric circular saw according to the first aspect of the present invention, the electric circular saw that includes a motor, a rotary saw blade, transmission means for transmitting the rotation of the motor to the rotary saw blade, and a handle are integrally attached to the support base. Since it consists of a circular saw and a mark jig that indicates the cutting tip position of the rotary saw blade, the optimum cutting tip position of the rotary saw blade that is covered with a safety cover and cannot be seen can be confirmed via the mark jig. Without relying on the operator's feeling, it is possible to know the predetermined position on the object to be cut and finish the cutting accurately.

  When the cutting position on the workpiece changes, the marking jig is movably provided. Therefore, the marking jig is moved to a predetermined position to determine the optimum cutting tip position of the rotary saw blade. By showing, it is possible to terminate the cutting accurately without stopping the cutting before the predetermined position or proceeding the cutting beyond the predetermined position.

  In the electric circular saw according to the second aspect of the present invention, in particular, the mark jig is detachably elastically held by the support base, and therefore, the mark jig is integrally formed from a synthetic resin having elasticity. At the same time, when the cutting position on the object to be cut is changed by detachably elastically holding the holding part on the flat plate part of the support base, the mark jig can be easily moved to the predetermined position to change the predetermined position. The cutting can be finished accurately at the position.

  In the electric circular saw according to the third aspect of the present invention, in particular, a rising rib is provided on the side edge of the support base to form a slide rail, and a marker jig is detachably and slidably attached to the slide rail. Therefore, when the cutting position on the workpiece is changed, the mark jig can be moved more smoothly to the predetermined position, and the cutting can be accurately finished at the predetermined position.

  In the electric circular saw according to the invention described in claim 4 of the present application, in particular, the mark jig comprises a mounting base that is attached to the slide rail and a mark portion, and the mark portion is elastically detachably attached to the mounting base portion. By making it possible to move, it can be slidably moved to a predetermined position, and can be removed when unnecessary.

  Hereinafter, an embodiment of an electric circular saw device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view showing the electric circular saw device. As shown in FIG. 1, the electric circular saw constituting the main body of the present invention includes a motor 9, a rotary saw blade 8, a transmission means 7 for transmitting the rotation of the motor 9 to the rotary saw blade 8, and a handle 6. A handle 6 is connected to the casing of the transmission means 7 which is integrally attached to the table 1. The trigger switch 61 attached to the handle 6 is a trigger system in which the switch is turned on when the handle 6 is pulled and the rotary saw blade 8 is rotated, but the switch is turned off when released.

  The upper part of the rotary saw blade 8 is covered with a safety cover 51, and the lower part of the rotary saw blade 8 is guarded by a frame cover 52. In FIG. Illustration is omitted. At the tip of the support base 1 in the moving direction of the electric circular saw shown by the arrow in FIG. 1, there is a cutting position guide 4 for accurately cutting the rotary saw blade 8 in accordance with the inking line struck on the workpiece. Is provided.

  The operator performs the cutting work by placing the support table 1 on the outer jacket cut object. That is, the handle 6 is grasped, the trigger switch 61 is pulled, the motor 9 is started, the rotary saw blade 8 is rotated, and various plate materials and siding materials are cut.

  At this time, as shown in FIG. 1, the cutting tip position of the rotary saw blade 8 is covered with the safety cover 51, so that it is not visible to the operator, the cutting is advanced with a rough register, and the predetermined position and In the estimated portion, the trigger switch 61 must be turned off in a timely manner. In particular, when cutting and splicing metal siding with a concavo-convex pattern on the surface according to the site dimensions, the cutting tip position of the rotary saw blade 8 is adjusted accurately so that a concavo-convex pattern is continuously formed. Need to cut.

  FIG. 2 is an explanatory view showing an optimum cutting tip position of the rotary saw blade 8 when cutting the metal siding S with the uneven pattern. As shown in FIG. 2, when the electric circular saw is advanced in the direction of the arrow and the cutting is to be ended while leaving the mountain portion S <b> 1 of the metal siding S, (a) is the cutting tip position of the rotary saw blade 8. It becomes. However, when the timing of turning off the trigger switch 61 is delayed, the rotary saw blade 8 advances in the direction of the arrow, and cuts the trough S2 of the metal siding S and cuts the crest S1 at (b).

  Thus, it is technically difficult to stop the rotation of the rotary saw blade 8 in a timely manner in a state where the cutting tip position of the rotary saw blade 8 is not visible, and to end the cutting at a predetermined optimum position. Requires considerable experience and skill. If it fails, the cutting must be performed again, and in the worst case, the material may be wasted.

  Therefore, in the electric circular saw device according to the present invention, as shown in FIG. 1, a mark jig 3 for indicating the cutting tip position of the rotary saw blade 8 is used. The mark jig 3 is detachably and slidably attached to a slide rail 2 formed by raising a side edge of the support base 1 on the rotary saw blade 8 side.

  FIG. 3 is a partial perspective view showing a state in which the mark jig 3 is attached to the slide rail 2. As shown in FIG. 3, the marker jig 3 is slidably attached to the slide rail 2. For example, when it is desired to finish cutting at the valley portion S <b> 2 while leaving the mountain portion S <b> 1 of the metal siding S, The point portion 3a of the mark jig 3 is set in advance in consideration of the position (A) in FIG.

  On the other hand, a black line is also drawn at a predetermined position on the valley S2 which is the target of the metal siding S, and the trigger switch 61 is turned off when the black line matches the point part 3a of the mark jig 3. By doing in this way, the cutting tip position of the rotary saw blade 8 stops rotating with the desired peak portion S1 remaining, and the cutting can be terminated at a predetermined position of the valley portion S2.

  Further, when it is desired to finish the cutting at the peak S1 while leaving the valley S2 of the metal siding S, as shown in FIG. 2, the protruding portion of the peak S1 is higher (b) than the above (A). In consideration of the above, the positioning jig 3 is aligned on the slide rail 2 and its position is set. On the other hand, a black line is drawn at a predetermined position on the peak S1 of the metal siding S, and the trigger switch 61 is turned off when the black line matches the point part 3a of the mark jig 3. By doing in this way, cutting can be complete | finished in the predetermined position of the peak part S1, leaving the desired trough part S2.

  FIG. 4 is an explanatory view showing a method of cutting the metal siding S designed in a concavo-convex pattern using the electric circular saw device according to the present invention at a predetermined position of the mountain portion S1 leaving the valley portion S2. In FIG. 4, the operator first aligns the cutting position guide 4 provided at the front portion of the support base 1 with the inking line B perpendicular to the concavo-convex pattern drawn on the metal siding S, and the inking line Continue cutting according to B.

  When the cutting progresses and the point portion 3a of the mark jig 3 matches the predetermined black line A drawn on the mountain portion S1, the cutting is stopped. At this time, the rotary saw blade 8 stops at the position indicated by (B) in FIG. Next, the direction of the metal siding S is changed, and this time, the cutting position guide 4 provided at the front portion of the support base 1 is aligned with the inking line A drawn on the metal siding S, and a predetermined inking line is obtained. According to A, cutting is performed on the peak S1. By cutting in this way, the desired rectangular metal siding S cut along the black lines A and B can be cut off.

  FIG. 5 is an exploded explanatory view showing a form in which the mark jig 3 includes a mark portion 31 and a mounting base portion 32. The attachment base portion 32 is slidably attached to the slide rail 2, and the mark portion 31 is elastically fitted to the attachment base portion 32 so as to be detachable. Further, as shown in FIG. 5, by providing a stopper 321 at the end of the mounting base portion 32, the mark portion 31 can be firmly elastically fitted and can be removed when not needed.

  Although the said embodiment described the case where the to-be-cut | disconnected object was the metal siding S, it can apply not only to the metal siding S but to what consists of corrugated sheets, for example, a vinyl chloride resin. Furthermore, you may apply to various board | plate materials, such as a plywood and a gypsum board. As described above, the present invention can be modified in design, and belongs to the technical scope of the present invention without departing from the scope of the claims.

The disassembled perspective view which shows the electric round saw apparatus concerning this invention. Explanatory drawing which shows the optimal cutting | disconnection tip position of a rotary saw blade when cut | disconnecting the to-be-cut object to which the uneven | corrugated pattern was attached. The electric circular saw apparatus concerning this invention WHEREIN: The fragmentary perspective view which shows the state which attached the mark jig | tool to the slide rail. Explanatory drawing which shows the method of cut | disconnecting the to-be-cut object designed in the uneven | corrugated pattern using the electric circular saw apparatus which concerns on this invention in the predetermined position of a peak part leaving a desired trough part. The electric circular saw apparatus which concerns on this invention WHEREIN: The exploded explanatory drawing which shows the form which comprised the mark jig | tool from the mark part and the attachment base part. The perspective view which shows a well-known electric round saw.

Explanation of symbols

A Predetermined inking line drawn on the ridge that forms the concavo-convex pattern of metal siding B Inked line drawn in the direction orthogonal to the concavo-convex pattern of metal siding S Metal siding S1 Mountain S2 Valley (b) Metal Cutting tip position of rotating saw blade when cutting with leaving siding peak (b) Cutting tip position of rotating saw blade when finishing cutting with leaving valley of metal siding 1 Support base 2 Slide rail 3 Marking jig 3a Point part 31 Marking part 32 Mounting base part 321 Stopper 4 Cutting position guide part 51 Safety cover 52 Frame cover 6 Handle 61 Trigger switch 7 Transmission means 8 Rotary saw blade 9 Motor

Claims (4)

  An electric circular saw device comprising an electric circular saw and a mark jig indicating a cutting tip position of the rotary saw blade, wherein the electric circular saw transmits the motor, the rotary saw blade, and the rotation of the motor to the rotary saw blade. An electric circular saw device which includes a transmission means and a handle and is integrally attached to a support base, and a mark jig indicating the cutting tip position of the rotary saw blade is movably provided on the support base.   2. The electric circular saw device according to claim 1, wherein the mark jig is elastically held in a detachable manner on a support base.   The electric circular saw device according to claim 1, wherein a rising rib is provided on a side edge of the support base to form a slide rail, and a marker jig is detachably and slidably attached to the slide rail.   4. The electric circular saw device according to claim 3, wherein the mark jig comprises a mounting base and a mark portion attached to the slide rail.

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