JP6133744B2 - Electric cutting tool - Google Patents

Description

  The present invention relates to an electric cutting tool, and more particularly to a technique for improving usability when a parallel ruler is attached.

  Conventionally, the main surface plate, a sub surface plate that can be attached to and detached from the side surface of the main surface plate, a main body portion provided on the main surface plate, and a driving force provided by the main body portion can be freely rotated. There is known an electric cutting tool that includes a circular saw blade, and in which the sub surface plate is attached to and detached from the main surface plate using attachment legs formed on the sub surface plate (see, for example, Patent Document 1 below) ). And in the conventional electric cutting tool illustrated by patent document 1, it fixes to the main surface plate (base) by one fastening means in the state which the attachment leg of the sub surface plate (sub base) and the parallel ruler were piled up. It is shown to be installed. That is, the technique described in Patent Document 1 has a mode in which the sub surface plate (sub base) and the parallel ruler are releasably fixed to the main surface plate (base) by one fixing means. With this mode, the sub surface plate (sub base) and the parallel ruler can be fixed to the main surface plate (base) at one time with a single fixing means, which not only reduces the number of parts but also streamlines the fixing operation. It is said that it is possible to improve the work efficiency of attaching an attachment such as a parallel ruler.

Japanese Patent No. 43338386

  However, since the technique described in the above-mentioned Patent Document 1 has a configuration in which the sub surface plate (sub base) and the parallel ruler are stacked and pressed and fixed by one fastening means (fastening screw), For example, when the fastening screw is loosened to correct the displacement of the sub surface plate (sub base), there is a problem that the parallel ruler is displaced.

  Also, when changing from the state where both the sub surface plate (sub base) and the parallel ruler are used to the state where only one of them is used, it is necessary to largely move (screw) the fixing screw. There was room for improving workability. This is also true in the opposite case, that is, when changing from a state using only one of the sub surface plate (sub base) and the parallel ruler to a state using both, In this case, it is necessary to move the fixing screw largely (screwed and then screwed again), so that the workability is still worse.

  In addition, if pressing and fixing with fixing screws is repeated for the mounting legs and parallel ruler of the sub surface plate (sub base), wrinkles will inevitably enter the mounting leg and parallel ruler. The configuration described in 1 is such that the mounting leg of the sub surface plate (sub base) and the parallel ruler are placed in sliding contact with each other. The trouble of being caught will also occur.

  The present invention has been made in view of the existence of various problems existing in the above-described prior art, and the object thereof is better than the prior art and can be used stably for a long period of time. The object is to provide a new electric cutting tool that has not existed before.

  The present invention will be described below. In addition, in order to make an understanding of this invention easy, the reference number of an accompanying drawing is attached in parenthesis writing, However, This invention is not limited to the form of illustration by it.

An electric cutting tool (10) according to the present invention includes a main surface plate (11a), a sub surface plate (11b) that is detachably attached to a side surface of the main surface plate (11a), and the main surface plate (11a). And a circular saw blade (41) that is rotatable by a driving force from a driving means (25) included in the main body (21), and the main surface plate ( 11a) is an electric cutting tool (10) in which attachment / detachment of the sub surface plate (11b) to the sub surface plate (11b) is performed using mounting legs (11b ₁ , 11b ₂ ), The main surface plate (11a) has guide shapes (11a ₁ , 11a ₂ ) for guiding the mounting legs (11b ₁ , 11b ₂ ), the guide shapes (11a ₁ , 11a ₂ ) and the mounting legs (11b). _1, 11b ₂₎ and de sky formed Relative to (S) is capable of inserting the parallel ruler (71), further, the main plate (11a) is attached leg fixing means for fixing said mounting leg (11b ₁₎ and (16) The parallel ruler fixing means (18) for fixing the parallel ruler (71) is provided separately.

In the electric cutting tool (10) according to the present invention, the mounting legs (11b ₁ , 11b ₂ ) may be formed as a substantially U-shaped cross section with a cross-sectional shape opening downward.

  In the electric cutting tool (10) according to the present invention, the parallel ruler fixing means (18) is installed at a position farther from the mounting leg fixing means (16) than the circular saw blade (41). Can be done.

  According to the present invention, it is possible to provide an unprecedented new electric cutting tool which has better workability than the prior art and can be used stably for a long period of time.

It is a right side perspective view for explaining the basic structure of the electric cutting tool according to the present embodiment. It is a partial longitudinal cross-section front view for demonstrating the drive mechanism of the electric cutting tool which concerns on this embodiment. It is a partial cross-sectional plane perspective view for demonstrating the structure of the surface plate vicinity of the electric cutting tool which concerns on this embodiment. It is a figure which shows the state which removed the sub surface plate from the electric cutting tool which concerns on this embodiment. It is a figure for demonstrating the structure of the vicinity of the surface plate which concerns on this embodiment. It is a longitudinal cross-sectional front view which shows the AA cross section in FIG. It is a partial longitudinal cross-section right view which shows the BB cross section in FIG. It is a partial longitudinal cross-section right view which shows CC cross section in FIG. It is a figure for demonstrating the fixation and cancellation | release mechanism of the cam type fixing lever which concerns on this embodiment. It is a figure which illustrates the state in the case of using the electric cutting tool which concerns on this embodiment for cutting operations, such as near a wall. It is a figure which shows the various structural examples of the space formed with an attachment leg and the upper surface of a main surface plate.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

  First, the basic structure of the electric cutting tool according to the present embodiment will be described with reference to FIGS. Here, FIG. 1 is a right side perspective view for explaining the basic structure of the electric cutting tool according to the present embodiment, and FIG. 2 is for explaining the drive mechanism of the electric cutting tool according to the present embodiment. FIG. 3 is a partial cross-sectional front view for explaining a configuration in the vicinity of the surface plate of the electric cutting tool according to the present embodiment. In addition, the electric cutting tool 10 which concerns on this embodiment illustrates the case where it is comprised as a hand-held electric circular saw. Further, the direction defined in this specification is as indicated by the name of the above drawing, but this direction is defined so as to coincide with the direction viewed from the operator who operates the electric cutting tool 10. is there.

  The electric cutting tool 10 according to the present embodiment includes a surface plate 11 placed on a workpiece, a main body portion 21 provided on the surface plate 11 so as to be tiltable, and a driving unit such as a motor 25 provided in the main body portion 21. And a circular saw blade 41 that can be rotated by a driving force from the head.

  The surface plate 11 is a member that installs the main body portion 21 above, and has a substantially rectangular shape when viewed from above. Further, the lower surface is formed as a smooth surface so that it can be stably placed on the workpiece, and the electric cutting tool 10 is operated while sliding the lower surface of the surface plate 11 on the workpiece. Thus, a stable cutting operation can be performed.

  Further, the surface plate 11 according to the present embodiment includes a main surface plate 11a on which the main body 21 is installed, and a sub surface plate 11b that is detachable on the right side surface of the main surface plate 11a. ing. Although specific configurations of the main surface plate 11a and the sub surface plate 11b will be described later, a circular saw blade 41 is located near the connection boundary between the main surface plate 11a and the sub surface plate 11b (see FIG. 3). When performing a cutting work in a narrow region such as, the workability can be improved by removing the sub surface plate 11b.

  The surface plate 11 is formed with an opening 12 for allowing the circular saw blade 41 included in the main body 21 to move up and down. The opening 12 is formed at the connection boundary between the main surface plate 11a and the sub surface plate 11b. The operator can identify the cutting position of the workpiece by viewing the workpiece from the opening 12. Although not shown in the drawing, a mark or the like that serves as a sight for cutting is formed in the vicinity of the opening 12 on the upper surface of the surface plate 11, and this mark is aligned with the black line drawn on the workpiece. By performing processing, it becomes possible to perform accurate processing.

  Further, since a safety cover 42 (described later) provided below the circular saw blade 41 passes through the opening 12, the openings corresponding to the shapes of the circular saw blade 41 and the safety cover 42 are provided. Part 12 shape is adopted. In particular, when the cutting process is performed, the rotating circular saw blade 41 winds up the chips from the workpiece, but the opening 12 is formed to be narrowed to the minimum necessary opening range. Therefore, the chips are effectively prevented from being deposited on the surface plate 11.

  Above the surface plate 11 described above, the main body 21 is in the vertical direction (that is, the direction along the rotational direction of the circular saw blade 41) and in the left-right direction (that is, the direction in which the circular saw blade 41 is tilted to the side). Each is installed in a tiltable state. The connection structure between the surface plate 11 and the main body 21 for realizing such an operation will be described with reference to FIG. 1. The front side of the electric cutting tool 10 (the right side in FIG. 1) is fixed via the pivot 22. The board 11 and the main body 21 are rotatably connected to each other. The main body 21 has the pivot 22 as a center of rotation and the back side of the main body 21 (the left side in FIG. 1) with respect to the surface plate 11. It can be tilted up and down. Therefore, the operator tilts the back side of the main body 21 (the left side in FIG. 1) in the vertical direction with respect to the surface plate 11, and causes the circular saw blade 41 to protrude or retract from the opening 12 of the surface plate 11. By doing so, the circular saw blade 41 can be moved in the direction along the rotation direction, so that the circular saw blade 41 can perform the cutting process. Further, the depth of cut can be adjusted by adjusting the protruding amount of the circular saw blade 41.

  In order to fix the above-described main body 21 to a desired tilt position, the surface plate 11 is provided with a link member 13 on the upper surface side in the back surface direction. The link member 13 is a member formed so as to extend from the upper surface side of the surface plate 11 along the tilting direction of the main body 21, and the connection end with the surface plate 11 is tiltable via the shaft member 14. Link connected. A guide hole 13 a is formed in the body of the link member 13. The guide hole 13a is formed as an opening hole with a step, and an engagement nut 23 is fitted into the step portion of the guide hole 13a. Therefore, by loosening the tightening of the engaging nut 23 with respect to the guide hole 13a of the link member 13, the main body 21 can be tilted to a desired tilt position, and further, the link member 13 can be tilted with respect to the guide hole 13a at the desired position. By tightening the engagement nut 23, the main body 21 can be fixed at a desired tilt position.

  On the other hand, although not shown in detail, the surface plate 11 and the main body 21 are connected to each other on the front and back surfaces by a shaft member, and the left and right direction (that is, the circular saw blade 41) is centered on the shaft member. It is possible to tilt in the direction in which the side falls to the side. In FIG. 1, an operation unit 15 for operating the shaft member on the front side is illustrated. With such a configuration, a desired inclination angle in the direction in which the circular saw blade 41 tilts toward the side surface can be set with respect to the circular saw blade 41.

  The main body portion 21 includes a housing 26 that houses a motor 25 that is a driving source, a cover portion 27 that covers an upper portion of the circular saw blade 41, and a grip portion that is formed on the upper portion of the housing 26 for operating the electric cutting tool 10. As a handle 28.

  The handle 28 is provided with a switch lever 28a for driving the rotation of the circular saw blade 41. When the operator pushes the switch lever 28a, the motor 25 is driven, and the rotational driving force is applied to the circular saw blade. The cutting process can be carried out by being transmitted to 41.

  Further, as shown in FIG. 1, an opening 29 is provided at the rear of the cover portion 27, and this opening 29 covers chips generated by the cutting operation of the circular saw blade 41 when the electric cutting tool 10 is used. It can be discharged outside the section 27.

  Further, the lower half of the circular saw blade 41 is covered with a safety cover 42. The safety cover 42 is configured to be housed while being rotated inside the cover portion 27 that covers the circular saw blade 41 by being pushed by the workpiece when the workpiece is cut. While ensuring that the operation is not hindered, safety for the operator is ensured.

  As shown in FIG. 2, the housing 26 includes a motor 25 serving as a driving source and a plurality of gear groups as rotational driving force transmission means for transmitting the rotational driving force of the motor 25 to the circular saw blade 41. Is stored.

  A fan 25b is fixed to the shaft tip on the right side of the motor shaft 25a of the motor 25 (the left side in FIG. 2). When the motor 25 is driven, the fan 25b rotates to introduce cooling air into the housing 26. As a result, the motor 25 and the like serving as a heat source are appropriately cooled, and the electric cutting tool 10 can be operated stably.

  Further, both ends of the motor shaft 25a of the motor 25 are supported by bearings 31 and 32, respectively. A start gear 25c is formed at the shaft end of the motor shaft 25a on the right side (the left side in FIG. 2). On the other hand, a saw blade shaft 41a in which a circular saw blade 41 is disposed via a plurality of gear groups is disposed below the starting gear 25c (lower side in the drawing in FIG. 2). The saw blade shaft 41a is pivotally supported via bearings 33 and 34 with respect to the interior of the housing 26. With such a configuration, the substantially lower half of the circular saw blade 41 is directed downward from the lower end of the housing 26. It protrudes through the opening 12 of the surface plate 11. A terminal gear 41b is fixed to the central portion of the saw blade shaft 41a entering the housing 26.

  As shown in FIG. 2, the gear group that connects between the start gear 25c and the terminal gear 41b is composed of a first gear 35a and a second gear 35b that are intermediate gears. The second gear 35b is fixed on the shaft side by side in series on the same shaft.

  In the electric cutting tool 10 according to the present embodiment configured as described above, the rotational driving force of the motor 25 is transmitted from the start gear 25c of the motor shaft 25a to the first gear 35a, the second gear 35b, and the end gear 41b. As a result, the circular saw blade 41 is configured to be rotationally driven.

  The basic configuration of the electric cutting tool 10 according to the present embodiment has been described above. Next, a characteristic configuration of the electric cutting tool 10 according to the present embodiment will be described by adding FIGS. 4 to 9 to the reference drawings. Here, FIG. 4 is a diagram illustrating a state in which the sub surface plate is removed from the electric cutting tool according to the present embodiment, and FIG. 5 is a diagram for explaining a configuration in the vicinity of the surface plate according to the present embodiment. It is. 6 is a longitudinal sectional front view showing the AA cross section in FIG. 5, FIG. 7 is a partial vertical sectional right side view showing the BB cross section in FIG. 5, and FIG. It is a partial longitudinal cross-section right view which shows CC cross section in FIG. Further, FIG. 9 is a view for explaining a fixing / releasing mechanism of the cam type fixing lever according to the present embodiment.

As shown in FIG. 4, the sub surface plate 11b according to the present embodiment has _two mounting legs 11b ₁ and 11b ₂ extending in the horizontal direction (upward in the drawing in FIG. 4). As shown in detail in FIG. 7 and FIG. 8, the _two mounting legs 11b ₁ and 11b ₂ are guided by guide shapes 11a ₁ and 11a ₂ formed on the main surface plate 11a, and are attached to the main surface plate 11a. The sub surface plate 11b is inserted. More specifically, as shown in FIG. 7, a guide shape 11a ₁ is formed on the upper surface side of the main surface plate 11a so that the cross-sectional shape forms a substantially U-shaped cross-section that opens obliquely upward to the right of the page. The mounting leg 11b ₁ is inserted so as to fit inside the guide shape 11a ₁ . On the other hand, as shown in FIG. 8, a guide shape 11a ₂ is formed on the upper surface side of the main surface plate 11a so as to form a substantially square-shaped cross section having a tunnel-shaped cross section without an opening. The mounting leg 11b ₂ is configured to be inserted so as to fit inside the 11a ₂ .

The two attachment legs 11b ₁ and 11b ₂ inserted along the guide shapes 11a ₁ and 11a ₂ formed on the main surface plate 11a are fixed as attachment leg fixing means according to this embodiment. By being pressed by the screws 16 and 17, it can be fixed to the main surface plate 11a.

Here, since the two attachment legs 11b ₁ and 11b _{2 according} to the present embodiment are both formed in a substantially U-shaped cross-section with the cross-sectional shape opening downward, they exhibit high rigidity in the attached state. It will be. In the present embodiment, the mounting legs 11b ₁ and 11b ₂ are tightened with the fixing screws 16 and 17 having an angle in an oblique direction, so the two mounting legs 11b ₁ and 11b _{2 are configured.} Will be pressed diagonally down to the right of the page. That is, the two mounting legs 11b ₁ and 11b ₂ are always fixedly installed at the same location when mounting to the main surface plate 11a.

Furthermore, since the mounting leg 11b _{1 according} to the present embodiment is formed as a substantially U-shaped cross section with the cross-sectional shape opening downward, when mounted on the main surface plate 11a, the mounting leg 11b ₁ between the mounting leg 11b _1, so that the space S having a constant constant cross-sectional area is formed. A parallel ruler 71 can be inserted into the space S. 5 to 7 illustrate a state in which the parallel ruler 71 is inserted into the space S.

  The parallel ruler 71 according to the present embodiment includes a ruler main body 71a that extends linearly, and a ruler head 71b that is formed to extend in a direction perpendicular to the end of one end of the ruler main body 71a. It is a member formed so that the overall appearance is substantially T-shaped.

Further, the parallel ruler 71 according to the present embodiment is mounted in a state in which it is inserted into a space S formed between the main surface plate 11a and the mounting leg 11b ₁ as shown in more detail in FIG. It can be fixed by a cam-type fixing lever 18 as a parallel ruler fixing means for fixing a parallel ruler 71 provided separately from a fixing screw 16 as a mounting leg fixing means for fixing the leg 11b _1. It has become.

  As shown in FIGS. 6 and 9, the cam-type fixing lever 18 is a member that is rotatably installed on the main surface plate 11a via a rotation shaft 18a, and is located above the rotation shaft 18a. The operation lever 18b has a cam shape 18c formed below the rotation shaft 18a. As shown in FIG. 9, the detailed structure is such that a plurality of grooves for preventing slipping are formed on the surface of the operation lever 18b. By operating the operation lever 18b, the rotation shaft 18a is rotated at the center of rotation. The cam shape 18c can be rotated. Further, a spring plate member 18d that constantly biases the cam shape 18c is disposed between the cam shape 18c and the ruler main body 71a of the parallel ruler 71 that is a fixed object.

  Here, FIG. 9A shows a state in which the ruler body 71a of the parallel ruler 71 is released from being fixed by the cam-type fixing lever 18. FIG. At this time, since the stopper portion 18c ′ formed as a part of the cam shape 18c is in contact with the main surface plate 11a, the cam shape 18c is positioned. Even if the operation force is received in the direction of rotation, the operation lever 18b cannot be moved. That is, the operation of the operation lever 18b and the cam shape 18c is restricted by the action of the stopper portion 18c ′ and the biasing force of the spring plate member 18d.

  On the other hand, FIG. 9B shows a state in which the ruler body 71a of the parallel ruler 71 is fixed by the cam-type fixing lever 18. As shown in the figure, when the operation lever 18b receives an operation force in a counterclockwise direction with respect to the paper surface, the spring plate member 18d is pressed downward by the action of the cam shape 18c. That is, a larger fixed pressing force is applied to the ruler main body 71a of the parallel ruler 71, which is a fixed object, through the spring plate member 18d with a small operation force due to the action of the cam shape 18c. Therefore, according to the cam-type fixing lever 18 according to the present embodiment, the ruler main body 71a of the parallel ruler 71 can be reliably fixed.

  From the above, in the cam-type fixing lever 18 according to the present embodiment, when the operation lever 18b is operated, the cam shaft 18c is rotated and the cam shape 18c is moved. By the action, the pressing force is applied to and released from the ruler main body 71a. With this configuration, the parallel ruler 71 can be fixed to and released from the main surface plate 11a.

As described above, in the present embodiment, the set screw 16 that is a mounting leg fixing means for fixing the mounting leg 11b ₁ and the cam-type fixing lever 18 that is a parallel ruler fixing means for fixing the parallel ruler 71. Are provided separately. Further, the parallel ruler 71 can be inserted into the space S formed between the main surface plate 11a and the mounting leg 11b ₁ without interfering with the mounting leg 11b ₁ . Therefore, according to the present embodiment, the sub surface plate 11b and the parallel ruler 71 can be individually fixed / unfixed and detached, so that the workability can be significantly improved as compared with the prior art. Further, since the fixing leg 11b ₁ and parallel ruler 71 is disposed in a state not to interfere with each other, event, even with a flaw in the fixing leg 11b ₁ and parallel ruler 71, is a mounting legs 11b ₁ and parallel ruler 71 There is no problem of being caught during movement. Therefore, according to the present embodiment, it is realized to provide a new electric cutting tool that is not conventionally available and can be used stably for a long period of time.

Further, in the present embodiment, the mounting leg 11b ₁ of the sub surface plate 11b, a ruler body portion 71a of the parallel ruler 71, since they are arranged to overlap on the main plate 11a, the electric cutting tool 10 itself An increase in size can be avoided. Also, by the fixing leg 11b ₁ and the ruler body portion 71a is superimposed arrangement, it is possible to reduce the distance from the front end of the main plate 11a (sub plate 11b) to the cutting position by the saw blade 41, more near wall Can be cut up to.

  In addition, even when changing from the state where both the sub surface plate 11b and the parallel ruler 71 are used to the state where only one of them is used, it is not necessary to change the other state, so that it has high workability. An electric cutting tool 10 is realized.

Further, a set screw 16 as a mounting leg fixing means for fixing the mounting leg 11b ₁ and a cam type fixing lever 18 as a parallel ruler fixing means for fixing the parallel ruler 71 are arranged side by side in the left-right direction. The installation interval between the two is relatively close. Such a configuration contributes to avoiding the enlargement of the apparatus while maintaining the operability of the fastening screw 16 and the cam type fixing lever 18, and operates while avoiding the enlargement of the electric cutting tool 10. It is significant in that the improvement in performance is realized.

  In the present embodiment, the cam-type fixing lever 18 that is a parallel ruler fixing means is installed at a position away from the fastening screw 16 that is an attachment leg fixing means with respect to the circular saw blade 41. If the parallel ruler 71 is used on the saw blade side with the sub surface plate 11b removed, the position ruler main body 71a is not restricted in the long range from the fixed position of the parallel ruler 71 to the guide surface, and the parallel ruler 71 is unstable. It becomes a state. However, the sub surface plate 11b is removed when a cutting operation such as a wall is performed in a state as shown in FIG. 10. In this case, in order to use the parallel ruler 71, the ruler head 71b is anti-saw blade. It will be limited to the case where it is installed and used toward the side. That is, in this embodiment, the cam type fixing lever 18 which is a parallel ruler fixing means is installed at a position away from the circular saw blade 41, and is close to the arrangement position of the ruler head 71b at the time of cutting operation. Therefore, the parallel ruler 71 does not become unstable in the actual work mode. That is, the electric cutting tool 10 according to the present embodiment has a suitable configuration along the actual work state.

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the embodiment.

For example, the mounting leg 11b _{1 according} to the present embodiment is formed as a substantially U-shaped cross section whose cross-sectional shape is open downward. Accordingly, as shown in sub-figures in FIG. 11 (a), the in the upper surface of the mounting leg 11b ₁ and the main plate 11a of a substantially U-shaped, the space S is formed. However, with respect to the method for forming the space S, various modifications can be adopted as long as the same effects as those of the above-described embodiment are exhibited. For example, as shown in a partial diagram (b) in FIG. 11, the shape of the mounting leg 11b _{3 is} a rectangular cross section, and the guide shape 11a ₃ formed on the main surface plate 11a places the mounting leg 11b ₃ upward. Thus, it is possible to form the space S. Further, as shown in a partial diagram (c) in FIG. 11, the mounting leg 11b _{4 has} a substantially L-shaped cross section, and a guide shape 11a ₄ corresponding to this shape is formed on the main surface plate 11a. S can be formed.

  Further, for example, the electric cutting tool 10 according to the present embodiment exemplifies a case where the electric cutting tool 10 is configured as a hand-held electric circular saw, but the present invention can be applied to other types of electric cutting tools. It is. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

10 electric cutting tool, 11 platen, 11a main surface _{plate, 11a 1, 11a 2, 11a} 3, 11a 4 guide shape, 11b sub-surface _plate, 11b _1, 11b _2, 11b 3, 11b ₄ mounting legs 12 opening , 13 Link member, 13a Guide hole, 14 Shaft member, 15 Operation part, 16, 17 Fixing screw, 18 Cam type fixed lever, 18a Rotating shaft, 18b Operation lever, 18c Cam shape, 18c 'Stopper part, 18d Spring Plate member, 21 body portion, 22 pivot shaft, 23 engaging nut, 25 motor, 25a motor shaft, 25b fan, 25c starting gear, 26 housing, 27 cover portion, 28 handle, 28a switch lever, 29 opening, 31, 32, 33, 34 Bearing, 35a First gear, 35b Second gear, 41 Circular saw blade, 41a Saw blade shaft, 41b Termination gear, 4 Safety cover, 71 parallel ruler, 71a ruler body portion, 71b ruler head, S space.

Claims (3)

The main surface plate,
A sub surface plate which is detachably attached to a side surface of the main surface plate,
A main body provided on the main surface plate,
A circular saw blade that is rotatable by a driving force from a driving means provided in the main body,
With
In the electric cutting tool in which the attachment and detachment of the sub surface plate with respect to the main surface plate is performed using mounting legs formed on the sub surface plate,
The main surface plate has a guide shape for guiding the mounting legs,
A parallel ruler can be inserted into the space formed by the guide shape and the mounting leg, and
In the main surface plate,
A mounting leg fixing means for fixing the mounting leg;
An electric cutting tool, wherein a parallel ruler fixing means for fixing the parallel ruler is provided separately. The electric cutting tool according to claim 1,
The electric cutting tool is characterized in that the mounting leg is formed as a substantially U-shaped cross-section with a cross-sectional shape opening downward. In the electric cutting tool according to claim 1 or 2,
The parallel ruler fixing means is installed at a position away from the mounting leg fixing means with respect to the circular saw blade.

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