JP2004009297A - Cutting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique useful for more improving a versatility on the mounting of a guide in a cutting tool. <P>SOLUTION: In the cutting tool having a cutting tool body part 103 with a blade 105, which cuts a material to be worked 197 during its advancement along a predetermined direction 199, a base 121, which is connected with the cutting tool body part 103 and, at the same time, abuts against the top surface of the material to be worked 197, and a guide 131 for guiding the blade 105 to advance toward the cutting direction 199 by sliding the cutting tool along the side 198 of the material to be worked mounted parallel to the base 121 on the fixing part 123 formed onto the base 121, an attachment 151 for fixing the guide 131 to the base 121 at a site except the fixing part 123 is detachably mounted to the base 121. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a general-purpose technique for attaching a guide to a cutting tool such as a circular saw or a cutter.
[0002]
[Prior art]
In a cutting tool such as a circular saw, when cutting a workpiece with a blade, a guide arranged in parallel with the blade is slid along the side surface of the workpiece, thereby guiding the cutting operation by the blade. It has been known. Such a guide is generally called a parallel ruler or a lip fence. In such prior art, a pole extending from the guide to the cutting tool side is generally fixed to the base of the cutting tool, whereby the guide is attached to the cutting tool.
[0003]
By the way, as a conventional guide mounting method, as is often used in the so-called popular type, when the guide is mounted on the base on the cutting tool side via one pole, it is often used in higher model or large model. In some cases, the guide is attached to the base via two (or more) poles. In the former case, a pole fixing portion is provided at one place on the base of the cutting tool, and the guide is attached to the base by fixing the pole to the fixing portion. On the other hand, in the latter case, a fixing portion corresponding to each pole is provided on the base of the cutting tool by the number of poles, and each pole is fixed by the corresponding fixing portion to attach the guide to the base.
[0004]
According to such a conventional guide mounting method, in order to mount the guide to the cutting tool, a configuration is adopted in which fastening portions corresponding to the number of poles are provided on the cutting tool side. There are inconveniences such as that the guide cannot be attached to a popular type of cutting tool.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of such a point, and an object of the present invention is to provide a technique useful for further improving versatility regarding guide attachment in a cutting tool.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in each claim is configured. According to the first aspect of the present invention, a cutting tool having a cutting tool main body, a base, and a guide is configured. The cutting tool body has a blade for cutting the workpiece while moving in a predetermined cutting direction. A "blade" typically cuts a workpiece by being driven to rotate, and a "cutting tool" typically includes a portable circular saw for cutting woodwork, a masonry work. Or a portable cutter for metalwork cutting. It is typically preferable that the “cutting tool main body” includes a blade and a motor for driving the blade. The base is connected to the cutting tool body and contacts the upper surface of the workpiece. Preferably, the base is typically constructed of an aluminum alloy for weight reduction. The guide is attached in parallel with the base to a fastening portion formed on the base, and slides along the side surface of the workpiece to guide the blade to proceed in the cutting direction, For example, it is preferable to use it as a parallel ruler.
[0007]
Further, in the present invention, an attachment for fixing the guide to the base at a position other than the fixing portion is detachably attached to the base. Since this attachment is detachably attached to the base, for example, when attaching a guide of a type that is fixed to the base at one place, the attachment is removed and stored, and the attachment is fixed to the base at two places. When the guide is attached, it is possible to attach the attachment to the base and to use the fastening of the guide to the base in cooperation with the fastening portion provided on the base. As a result, there has been provided a technology capable of flexibly responding to a change in the mounting position of the guide with respect to the base. Note that examples of the configuration of the attachment broadly include a form in which the guide can be fixed to the base, such as a screw, a bolt, and a one-touch fastener.
[0008]
(Invention of claim 2)
It is preferable that the guide of the cutting tool has a sliding portion and a plurality of poles. The sliding contact portion is configured to extend in parallel with the traveling direction of the blade and to be in sliding contact with the workpiece, and each pole is configured to extend from the sliding contact portion to the base side and be fixed to the base. Is preferred. It is preferable that the attachment has a pole insertion hole through which at least one of the plurality of poles is inserted, and a screw that releasably fastens the pole inserted through the pole insertion hole.
[0009]
By using a configuration in which the guide is attached to the base by releasably fastening the pole inserted in the pole insertion hole with a screw, the guide can be easily engaged and disengaged from the base, further improving practicality. It becomes possible. According to claim 2, various attachments such as a form in which one of the two poles is fastened to the attachment, a manner in which one or more of the three or more poles are fastened to the corresponding attachment, and the like. It is intended to broadly cover the usage form of.
[0010]
(Invention of claim 3)
Further, in the electric power tool according to the second aspect, it is preferable that the pole fixed to the attachment is configured to be further supported by a pole supporting portion formed on the base portion. By supporting the pole at a plurality of locations using the base in addition to the attachment, it is possible to prevent backlash and inclination of the guide attached to the base. From the viewpoint of securely holding the guide, it is preferable that the pole supporting portion formed on the base portion be configured to contact the pole in a planar or linear manner to support the pole. Further, the pole may be configured to be supported on multiple sides, such as the top, bottom, or side surfaces of the pole.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the embodiment of the present invention, a circular saw 101 will be described as an example of a cutting tool as shown in FIG. As shown in FIG. 1, the circular saw 101 according to the present embodiment is mainly configured by a circular saw main body 103, a base 121, and a parallel ruler 131 as main components. Among them, the circular saw 101 corresponds to a “cutting tool” in the present invention, the circular saw main body 103 corresponds to a “cutting tool main body” in the present invention, and the parallel ruler 131 corresponds to a “guide” in the present invention. I have.
[0012]
The circular saw body 103 includes a blade 105 for cutting the workpiece 197, a blade case 107 containing the blade 105, a motor 109 for driving the blade 105 to rotate, and a motor housing containing the motor 109. In addition to having a hand grip 111 connected to the motor housing 111 and a tilt angle with respect to the base 121, the cutting depth of the workpiece 197 by the blade 105 can be freely changed. The base 121 is formed of an aluminum alloy, and a fastening portion 123 for attaching a parallel ruler 131 described later is provided at a front side thereof, that is, at an appropriate position on the cutting direction 199 side of the blade 105.
[0013]
The parallel ruler 131 mainly includes a sliding contact portion 133, a first pole 137, and a second pole 139. The first pawl 137 and the second pawl 139 are fixed to the sliding portion 133 by set screws 137a and 139a, respectively. Thus, a so-called two-pole parallel ruler 131 is formed. The sliding contact portion 133 has a sliding contact surface 135 slidable along the side surface 198 of the workpiece 197 in the cutting direction 199 of the workpiece 197 by the blade 105. The first pole 137 is fixed to the base 121 by being fixed to the fixing portion 123 via the fixing screw 124. The second pole 139 is fixed to the base 121 via an attachment 151 detachably attached to the base 121, as described later. The slide contact portion 133 is configured to extend in parallel with the blade 105 in the cutting direction 199 of the blade 105 by being attached to the base 121 via the first pole 137 and the second pole 139. You.
[0014]
Details of the attachment state of the attachment 151 to the base 121 are shown in FIG. 2, FIG. 3 which is a cross section taken along line AA in FIG. 2, FIG. 4 which is a cross section taken along line BB in FIG. 2, and FIG. 5 and FIG. 6, which are sectional views, are shown in FIG. The attachment 151 is detachably attached to the base 121 via an attachment attachment screw 152. Further, the attachment 151 is firmly fixed to the base 121 by the attachment arms 151a and 151b engaging with the edges of the base 121, respectively, as is particularly well shown in FIGS.
[0015]
The attachment 151 includes a pole insertion hole 153 through which the second pole 139 is inserted, and a screw 155 that is screwed into the pole insertion hole 153 to releasably fix the second pole 139 to the attachment 151. An operation knob 156 for an operator is attached to the screw 155. A spring 157 for preventing the screw 155 from loosening is inserted between the operation knob 156 and the attachment 151.
[0016]
6, a groove-shaped pole support 125 extending in parallel with the second pole 139 is formed on the rear surface of the base 121 (see also FIG. 1). ing. The second pole 139 is fixed to the base 121 by the screw 155 of the attachment 151 and is securely supported in a surface contact state by the pole supporting portion 125, so that the pole mounting accuracy with respect to the base 121 is maintained in good condition. It is possible to do. In addition, since the pole supporting portion 125 makes surface contact with the upper surface, the side surface, and the lower surface of the second pole 139, even if a strong external force is suddenly applied to the parallel ruler 131 from each direction, the second supporting member 125 is kept in the second position. Since the pole 139 is firmly supported along the longitudinal direction of the pole 139, the fastening strength of the parallel ruler 131 can be improved.
[0017]
The circular saw 101 according to the present embodiment is configured as described above. Next, the operation of the circular saw 101 will be described. At the time of cutting the workpiece 197, the attachment 151 is attached to the rear end side of the base 121 by the attachment attachment screw 152. Next, the first pawl 137 of the parallel ruler 131 is inserted into the fastening portion 123 of the base 121, and the fastening screw 124 is tightened to fix the first pawl 137 to the fastening portion 123. Further, the second pole 139 is inserted into the pole insertion hole 153 of the attachment 151 attached to the base 121, and the operation knob 156 is appropriately operated to fix the second pole 139 to the attachment 151 with the screw 155. Thus, a state where the parallel ruler 131 is attached to the base 121 is obtained.
[0018]
As described above, the first pole 137 and the second pole 139 are fixed by the fixing portions 123 and the attachments 151, so that the base 121 of the circular saw 101 is processed while the parallel ruler 131 is attached to the base 121. It is placed on the upper surface of the member 197. At this time, the parallel ruler 131 is arranged such that the sliding contact surface 135 of the parallel ruler 131 comes into surface contact with the side surface 198 of the workpiece 197. In this state, the operator pushes the hand grip 113 to move the circular saw 101 in the cutting direction 199. Then, the sliding surface 135 of the parallel ruler 131 slides along the side surface 198 of the workpiece 197, and the blade 105 cuts the workpiece 197 while being guided in the cutting direction 199 by the parallel ruler 131.
[0019]
As described above, the attachment 151 in the present embodiment can be easily removed from the base 121 by releasing the attachment mounting screw 152. Therefore, when the circular saw 101 is intended to use a parallel ruler of the type attached to the base 121 with only one pole, instead of the above-described two-pole parallel ruler 131, the pole is placed on the base 121. The parallel ruler is attached to the base 121 by fixing the parallel ruler to the fixing portion 123. The unused attachment 151 can be removed from the base 121 by releasing the attachment mounting screw 152 and stored so as not to disturb the work.
[0020]
That is, in the present embodiment, when the two-pole parallel ruler 131 is used, the parallel ruler 131 is attached to the base 121 using the attachment 151, and when the single-pole parallel ruler is used, It is possible to flexibly cope with attachment of a plurality of types of parallel rulers, such as removing the unused attachment 151 from the base 121. In addition, unlike the base 121 used in the present embodiment, in which only one pole-type parallel ruler can be attached, the attachment 151 can be attached without increasing the front-rear length of the base 121. Thus, it was possible to easily cope with a two pole type parallel ruler, and it became possible to improve the versatility of mounting the parallel ruler.
[0021]
Further, in the present embodiment, the pole support portion 125 is formed on the base 121, and the second pole 139 is supported by the pole support portion 125 in a surface contact state, whereby the second pole 139 is firmly supported. Can be. Moreover, since the pole supporting portion 125 firmly supports the upper surface, the side surface, and the lower surface of the second pole 139 in a surface contact state, the rigidity of the parallel ruler 131 against external force can be improved.
[0022]
In this embodiment, the attachment attachment screws 152 are used to attach the attachment 151 to the base 121. However, the attachment attachment screws 152 can be replaced with one-touch releasable attachment means such as a buckle or a turnover. Further, in order to cope with the increase in the number of poles of the parallel ruler, the number of attachments to be attached to the base 121 may be plural.
[0023]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the technique useful for further improving the versatility regarding guide attachment in a cutting tool was provided.
[Brief description of the drawings]
FIG. 1 is a plan view showing the entire configuration of a circular saw according to the present embodiment.
FIG. 2 is a partial view showing details of a structure for attaching an attachment to a base according to the embodiment.
FIG. 3 is a sectional view taken along line AA in FIG. 2;
FIG. 4 is a sectional view taken along line BB in FIG. 2;
FIG. 5
FIG. 3 is a cross-sectional view of the attachment as viewed from a direction C in FIG. 2.
FIG. 6
It is DD sectional drawing in FIG.
[Explanation of symbols]
101 circular saw (cutting tool)
103 Circular saw body (cutting tool body)
105 Blade 107 Blade case 109 Motor 111 Motor housing 113 Hand grip 121 Base 123 Fastening part 124 Fastening screw 125 Pole support part 131 Parallel ruler (guide)
133 Sliding contact portion 135 Sliding contact surface 137 First pawl 137a Set screw 139 Second pawl 139a Set screw 151 Attachment 151a, b Mounting arm 152 Attachment mounting screw 153 Pole insertion hole 155 Screw 156 Operation knob 157 Spring 197 Workpiece 198 Workpiece side 199 Cutting direction

Claims (3)

A cutting tool body having a blade for cutting the workpiece while traveling in a predetermined cutting direction; a base connected to the cutting tool body and abutting on the upper surface of the workpiece; and a stop formed on the base. A cutting tool having a guide attached to the attachment portion in parallel with the base and slid along the side surface of the workpiece to guide the blade to advance in the cutting direction,
A cutting tool, wherein an attachment for fixing the guide to the base at a position other than the fixing portion is detachably attached to the base. 2. The cutting tool according to claim 1, wherein the guide extends in parallel with a traveling direction of the blade and slides in contact with the workpiece, and extends from the sliding contact to the base side. 3. And a plurality of poles fixed to the base, wherein the attachment releases a pole insertion hole through which at least one of the plurality of poles is inserted, and the pole inserted through the pole insertion hole. A cutting tool having a screw for freely fixing. The cutting tool according to claim 2, wherein the pole fixed to the attachment is further supported by a pole support formed on the base.

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