JP2022046091A - Stopper, stopper device, set of accessories used with portable processing machine, and method of plunge machining - Google Patents

Abstract

To improve operability when performing plunge machining by using a portable processing machine.SOLUTION: A stopper device (front stopper 100a, rear stopper 100b) used with a portable processing machine (circular saw 10) including a base 20 to abut with a workpiece 90, and a long ruler 60 comprises: a first stopper which restricts the movement of the portable processing machine along a longer direction of the long ruler by abutting with the base; and a second stopper which restricts the movement of the portable processing machine along a longer direction of the long ruler by abutting with the base. The stopper device is constituted so as to be attached to the long ruler to be capable of adjusting the distance between the first stopper and the second stopper in the longer direction of the long ruler.SELECTED DRAWING: Figure 13

Description

The present invention relates to a portable processing machine having a base for contacting a work material, a long ruler, and a stopper device for use together.

A cutting machine called a portable plunge circular saw (hereinafter, also simply referred to as a circular saw) is known (for example, Patent Document 1 below). This type of circular saw comprises a substantially rectangular base with a contact surface for contacting the material to be cut, and a body portion. The main body includes an electric motor and a disk-shaped saw blade that is rotationally driven by the electric motor. The saw blade is housed in the cover in a state of being urged upward by the urging member (the position of the saw blade at this time is also referred to as top dead center).

When using such a circular saw, the user arranges the circular saw at the cutting start position of the material to be cut so that the contact surface of the base abuts on the material to be cut. The user then displaces the saw blade from top dead center to bottom dead center with the saw blade rotated. At this time, the lower part of the saw blade protrudes below the base, and cutting of the material to be cut is started. Next, the user moves the circular saw forward to the cutting end position while maintaining the position of the saw blade at the bottom dead center (the moving direction of the circular saw at this time is also referred to as the cutting direction). Then, the user stops the rotation of the saw blade and then returns the saw blade to the top dead center. Such a cutting method is called plunge cut. When a chalk line is attached on the material to be cut from the cutting start position to the cutting end position, the circular saw is positioned with respect to the material to be cut during plunge cutting based on the chalk line.

A long ruler may be used with the circular saw to assist in such plunge cutting work. For example, when a linear groove extending in the cutting direction is formed on the bottom surface of the base of the circular saw, a long length in which a linear convex portion fitted to the groove is formed along the longitudinal direction. You can use a ruler. Specifically, the user arranges the long ruler and the circular saw so that the convex portion of the long ruler and the groove portion of the base are fitted, and moves the circular saw in the cutting direction while maintaining this fitted state. This makes it possible to cut the material to be cut straight from the cutting start position to the cutting end position.

JP-A-2018-176310

However, even if the conventional plunge marunoco is used together with a long ruler, there is still room for improvement in operability during plunge cutting. Specifically, if a long ruler is used, the cutting position of the long ruler in the lateral direction can be exactly matched to the chalk line, but the cutting position in the longitudinal direction is not necessarily exactly aligned with the chalk line. I can't do that.

For example, in order to finish cutting accurately at the cutting end position, it is necessary to finish the plunge cut with the position of the saw blade accurately aligned with the end point of the black line. Such alignment at the cutting end position is performed by visually observing the saw blade or by visually observing a marker indicating the position of the saw blade provided on the cover covering the saw blade. In either case, it is necessary to carefully visually check the progress of cutting while moving the circular saw forward, which increases the burden on the user. Alternatively, there is a risk that the cutting cannot be completed accurately at the cutting end position due to an operation error.

Alternatively, when the rotating saw blade is displaced from top dead center to bottom dead center at the cutting start position and comes into contact with the material to be cut, the circular saw receives a reaction force from the material to be cut. If the user cannot withstand this reaction force and the position of the circular saw with respect to the material to be cut shifts, the cutting start position naturally shifts from the correct position.

The above-mentioned problem is not limited to the case of using the plunge round saw, but is common to the case of performing plunge processing using various portable processing machines. For these reasons, it is desired to improve the operability when plunge processing is performed using a portable processing machine.

According to one aspect of the present invention, there is provided a portable processing machine having a base for contacting with a work material, a long ruler, and a stopper device for use together. This stopper device includes a first stopper for restricting the movement of the portable processing machine along the longitudinal direction of the long ruler by contact with the base, and a portable processing machine along the longitudinal direction of the long ruler. It is provided with a second stopper for restricting the movement of the device by contact with the base. The stopper device is configured to be attached to the long ruler so that the distance between the first stopper and the second stopper in the longitudinal direction of the long ruler can be adjusted.

This stopper device can be used, for example, as follows. First, the user fixes a long ruler in place on the work piece. Then, when the portable processing machine is in the processing end position, the user causes the first stopper to come into contact with the base in front of the portable processing machine in the moving direction of the portable processing machine (hereinafter, simply referred to as the moving direction). As such, the position of the first stopper with respect to the long ruler is fixed. The user then positions the second stopper with respect to the long ruler so that the second stopper abuts the base behind the portable processing machine in the moving direction when the portable processing machine is in the machining start position. Fix it. When positioning the first stopper and the second stopper, the portable processing machine has a marker indicating the position of the processing blade provided on the cover covering the processing blade and a black line while the portable processing machine is not driven. By aligning and, it can be accurately placed at the machining end position and the machining start position. Next, the user arranges the portable processing machine at the processing start position so that the second stopper abuts on the base behind the portable processing machine, and displaces from the top dead center to the bottom dead center while rotating the processing blade. Let me. The user then rotates the machining blade and moves the portable machine forward along a long ruler until the base abuts on the first stopper. In this way, when the portable processing machine is moved to the processing end position, the user returns the processing blade from the bottom dead center to the top dead center after stopping the rotation of the processing blade.

When plunge processing is performed using the stopper device in this way, the rotating processing blade is displaced from the top dead center to the bottom dead center at the processing start position, and when it comes into contact with the work piece, the portable processing machine can be used. Even if a backward reaction force is received from the work piece, the second stopper abuts on the base at the rear of the portable processing machine to restrict the movement of the portable processing machine to the rear. Therefore, the portable processing machine does not shift backward. Moreover, if the user moves the portable processing machine forward along the long ruler until the base abuts on the first stopper, the portable processing machine naturally stops at an accurate processing end position. Therefore, the user does not need to carefully visually check the forward movement status of the portable processing machine (that is, the forward progress of processing) in order to stop the portable processing machine at the correct processing end position. .. As a result, operability is improved and accurate processing becomes possible.

According to one aspect of the present invention, each of the first stopper and the second stopper may be separate parts separated from each other. The first stopper may have a first fixing mechanism for fixing to a long ruler so that it can be released from fixing. The second stopper may have a second fixing mechanism for fixing to a long ruler so that it can be released from fixing. According to this aspect, since it is not necessary to connect the first stopper and the second stopper, the stopper device as a whole can be made compact. Further, as the compact size is increased, the stopper device becomes easier to handle, so that the operability is also improved.

According to one aspect of the present invention, each of the first fixing mechanism and the second fixing mechanism has a knob screw having a shaft portion on which a male screw is formed and a pressing member having a screw hole screwed into the male screw. And may be provided. Each of the first fixing mechanism and the second fixing mechanism may be configured so that a predetermined portion of the long ruler can be sandwiched between the knob screw and the pressing member by tightening the knob screw. According to this aspect, the first stopper and the second stopper can be attached to the long ruler with a simple configuration.

According to one aspect of the present invention, the first stopper and the second stopper may be formed of a rigid body. According to this aspect, each of the first stopper and the second stopper can restrict the movement of the portable processing machine without substantially deforming regardless of which portion abuts on the base. Therefore, each of the first stopper and the second stopper can perform its function both when it is attached to the front of the portable processing machine and when it is attached to the rear. Therefore, the user can attach the first stopper and the second stopper to the long ruler either in front of or behind the portable processing machine without distinguishing between the first stopper and the second stopper, and the operability is improved.

According to one aspect of the present invention, the first stopper and the second stopper may have the same configuration as each other. According to this aspect, the manufacturing process of the stopper device can be simplified and the manufacturing cost can be reduced as compared with the case where the first stopper and the second stopper have different configurations from each other.

According to one aspect of the present invention, each of the first stopper and the second stopper includes a connecting portion configured to be connectable to the base so as to be slidable on a long ruler integrally with the base. May be. According to this aspect, when the first stopper and the second stopper are positioned at positions corresponding to the machining start position and the machining end position of the portable processing machine, the portable processing machine can be moved to an appropriate position. , The first stopper and the second stopper also move integrally and are placed in place. Therefore, it is not necessary to individually move the portable processing machine, the first stopper, and the second stopper to appropriate places, and the operability is improved.

According to one aspect of the present invention, each connecting portion of the first stopper and the second stopper is a first in the longitudinal direction in a state where the first stopper and the second stopper are attached to a long ruler. It may include a first connecting portion arranged on the side and a second connecting portion arranged on the second side opposite to the first side. According to this aspect, the user can make the connecting portion function regardless of whether the first stopper and the second stopper are attached to the front or the rear of the portable processing machine. Therefore, operability is improved.

According to one aspect of the present invention, there is provided a portable processing machine having a base for contacting the material to be processed, a long ruler, and a stopper for use together. This stopper is configured to be attachable to a long ruler in order to regulate the movement of the portable processing machine along the longitudinal direction of the long ruler by contact with the base. The stopper is provided with a connecting portion configured to be connectable to the base so that it can slide on a long ruler integrally with the base. This stopper can be used in the same manner as any of the first stopper and the second stopper described above. Further, according to this aspect, when the stopper is positioned at the position corresponding to the machining start position or the machining end position of the portable processing machine, if the portable processing machine is moved to a suitable place, the stopper also moves integrally. And it is placed in the right place. Therefore, it is not necessary to move the portable processing machine and the stopper individually to the appropriate places, and the operability is improved.

According to one aspect of the present invention, the connecting portion may include a permanent magnet. According to this aspect, the base and the connecting portion can be connected with a simple configuration by utilizing the attractive force of the magnet. A ferromagnetic member may be attached to the base at a position where it is connected to the connecting portion.

According to one aspect of the present invention, the stopper device or the stopper is an accommodating portion into which a permanent magnet can be inserted, and includes an accommodating portion for accommodating the permanent magnet in a state where the permanent magnet is prevented from coming off from the accommodating portion. You may. According to this aspect, the permanent magnet can be held by the stopper (or the first and second stoppers) with a simple structure.

According to one aspect of the invention, an accessory set for use with a portable processing machine is provided. This accessory set includes one of the stopper devices and stoppers described above, and a long ruler. According to this accessory set, the same effect as the above-mentioned stopper device and stopper can be obtained.

According to one aspect of the present invention, there is provided a method of performing plunge processing using a portable processing machine having a base for abutting the material to be processed and a long ruler. In this method, the first step of plunging the workpiece while moving the portable processing machine from the processing start position to the processing end position along the longitudinal direction of the long ruler, and the portable processing machine is the processing start position. A second step of attaching the stopper to the long ruler is provided prior to the first step so that it comes into contact with the base behind the portable processor in the direction of movement of the portable processor. ing. In the first step, the plunge processing is started in a state where the stopper attached by the second step and the base are in contact with each other. According to this method, even if the portable processing machine receives a backward reaction force from the workpiece at the start of plunge processing, the stopper comes into contact with the base behind the portable processing machine and is rearward of the portable processing machine. Regulate movement to. Therefore, the portable processing machine does not shift backward.

According to one aspect of the present invention, there is provided a method of performing plunge processing using a portable processing machine having a base for abutting the material to be processed and a long ruler. In this method, the first step of plunging the workpiece while moving the portable processing machine from the processing start position to the processing end position along the longitudinal direction of the long ruler, and the portable processing machine is the processing end position. A second step of attaching the stopper to the long ruler is provided prior to the first step so that it comes into contact with the base in front of the portable machine in the direction of movement of the portable machine. ing. In the first step, plunge processing is performed by moving the portable processing machine until the stopper attached by the second step and the base come into contact with each other. According to this method, the portable processing machine naturally stops at an accurate processing end position. Therefore, the user can stop the portable processing machine at an accurate processing end position without requiring careful visual inspection.

It is a perspective view of the long ruler used together with the stopper by one Embodiment of this invention. It is a perspective view of a stopper seen from the upper side. It is a perspective view of a stopper seen from the lower side. It is a top view of a stopper. It is a vertical sectional view of the stopper along the line AA of FIG. It is a vertical sectional view of the stopper along the line BB of FIG. It is an exploded perspective view of a stopper. It is sectional drawing which shows the state which the stopper is attached to the long ruler. It is a perspective view which shows the state of positioning the front stopper. FIG. 9 is a partially enlarged view of FIG. FIG. 3 is a perspective view showing how the front stopper is positioned as seen from the side opposite to FIG. 9. It is a perspective view which shows the state of positioning a rear stopper. It is a perspective view which shows the state of positioning the rear side stopper as seen from the side opposite to FIG. It is a perspective view which shows the state that the cutting was started at the cutting start position. It is a perspective view which shows the state that the cutting was advanced to the cutting end position.

A method of performing plunge cutting using a portable circular saw (hereinafter, simply referred to as a circular saw) 10, a long ruler 60, and a stopper 100 according to an embodiment of the present invention will be described with reference to the drawings. In the following description, when the user holds the circular saw 10 in his hand and cuts the material to be cut, the direction in which the circular saw 10 is advanced (the direction in which the cutting is advanced, which is also called the cutting direction) is set as the front side, and the opposite direction is set as the front side. Defined as posterior. At this time, the side located above in the vertical direction is defined as the upper side, and the opposite side is defined as the lower side.

First, the configurations of the circular saw 10, the long ruler 60, and the stopper 100 will be described. The circular saw 10 is a so-called plunge circular saw. Since the plunge circular saw is well known, the configuration of the circular saw 10 will be briefly described. As shown in FIG. 10, the circular saw 10 includes a base 20, a main body portion 30, and a cover 40. The base 20 has a substantially rectangular outer shape. A groove extending in the front-rear direction is formed on the bottom surface of the base 20 (not shown). This groove is configured so that the convex portion 61 of the long ruler 60, which will be described later, can be fitted.

The main body portion 30 is basically arranged above the base 20. The main body 30 includes an electric motor (not shown) and a disk-shaped saw blade (not shown) called a tip saw. The saw blade is rotationally driven by an electric motor. The cover 40 covers the saw blade at least partially. The main body 30 including the saw blade is swingable with respect to the base 20 and the cover 40, and is configured to be displaced in the vertical direction while drawing an arcuate locus. The main body 30 including the saw blade is urged toward the side opposite to the base 20 (that is, upward) by a compression spring (not shown) arranged between the base 20 and the main body 30. ing.

When the saw blade is at top dead center, the saw blade is completely contained within the cover 40. In other words, the saw blade is generally located above the base 20. On the other hand, when the saw blade is at the bottom dead center due to the main body portion 30 being pushed down, a part of the saw blade (approximately half of the lower side) is located below the base 20 and cuts the material to be cut. Will be possible.

Markers 41 and 42 are attached to the cover 40. The marker 41 indicates the position of the front end of the saw blade (that is, the front end of the cuttable range) when the saw blade is at bottom dead center. The marker 42 indicates the position of the rear end of the saw blade (that is, the rear end of the cuttable range) when the saw blade is at bottom dead center.

As shown in FIG. 1, the long ruler 60 has a rectangular shape when viewed from above. The long ruler 60 includes a convex portion 61 and a guide groove portion 62. The convex portion 61 and the guide groove portion 62 extend in the longitudinal direction D1 of the long ruler 60. As described above, the convex portion 61 is a portion that fits into the groove formed on the bottom surface of the base 20 of the circular saw 10. The guide groove portion 62 is located at one end of the long ruler 60 in the direction D2 (hereinafter referred to as the lateral direction D2) orthogonal to the longitudinal direction D1. The guide groove upper end portion 64 located at the upper end of the guide groove portion 62 projects inward from both ends of the lateral direction D2 so as to approach each other. The opening on the upper side of the guide groove portion 62 is narrowed by the guide groove upper end portion 64. A concave portion 63 is formed between the convex portion 61 and the guide groove portion 62 along the longitudinal direction D1. The long ruler 60 is arranged so that the longitudinal direction D1 is in the front-rear direction at the time of use.

As shown in FIGS. 2 to 7, the stopper 100 includes a stopper main body 110. The direction indications in FIGS. 2 and 3 indicate the orientation when the stopper 100 is used. “D1” indicates the longitudinal direction D1 of the long ruler 60, and “D2” indicates the lateral direction D2 of the long ruler 60. Represents. The stopper main body 110 includes an upper portion 111 of a substantially rectangular parallelepiped, two protrusions 112, and one protrusion 113. The two projecting portions 112 project downward from the upper portion 111 in the vicinity of one end of the upper portion 111 in the lateral direction D2, and are arranged apart from each other in the longitudinal direction D1. The protruding portion 113 is a region including the center of the upper portion 111 in the lateral direction D2, and protrudes downward from the upper portion 111. The protrusion 113 is formed over the entire width of the upper portion 111 in the longitudinal direction D1.

The stopper 100 further includes a knob screw 120 and a pressing member 130 as an example of a fixing mechanism for fixing the stopper 100 to the long ruler 60 so as to be able to be fixed and released. As shown in FIG. 7, the knob screw 120 includes a knob portion 121 and a shaft portion 122 extending from one end of the knob portion 121. A male screw is formed on the shaft portion 122. The shaft portion 122 is inserted into the through hole 117 formed in the upper portion 111 via the washer 140. The tip of the shaft portion 122 penetrates the through hole 117 and projects downward from the upper portion 111.

As shown in FIG. 7, the pressing member 130 is a plate of a substantially rectangular parallelepiped, and has a screw hole 131 to be screwed into a male screw of a shaft portion 122. As shown in FIGS. 3 and 5, the pressing member 130 is attached to the tip of the shaft portion 122 by screwing the shaft portion 122 and the screw hole 131. As shown in FIG. 3, the pressing member 130 is arranged between the two protrusions 112. As shown in FIG. 3, the width of the pressing member 130 in the lateral direction D2 is larger than the width of the protruding portion 112 in the lateral direction D2. Therefore, the pressing member 130 projects outward from the protruding portion 112 on both sides of the longitudinal direction D1.

In this embodiment, the stopper 100 having such a structure is entirely formed of a rigid body. That is, the stopper 100 is made of a material that does not deform even if it collides with the base 20 when used in the procedure described later. The stopper body 110 may be made of, for example, hard plastic, and the pressing member 130 may be made of, for example, metal.

As shown in FIG. 8, the stopper 100 is fixed to the long ruler 60 in a state where the protruding portion 112 and the pressing member 130 are arranged in the guide groove portion 62 of the long ruler 60. The protrusion 112 and the pressing member 130 can be inserted into the guide groove 62 from both ends of the long ruler 60 in the longitudinal direction D1. When the protrusion 112 and the pressing member 130 are arranged in the guide groove 62, the protrusion 113 is housed in the recess 63. Since it is larger than the opening of the upper end portion 64 of the guide groove, the pressing member 130 does not come out upward from the opening of the upper end portion 64 of the guide groove. When the knob screw 120 is tightened in the state shown in FIG. 8, the distance between the knob portion 121 and the pressing member 130 becomes smaller, and the guide groove upper end portion 64 is vertically sandwiched between the knob portion 121 and the pressing member 130. Thereby, the stopper 100 can be fixed to the long ruler 60 at an arbitrary position along the longitudinal direction D1. According to the knob screw 120 and the pressing member 130, the stopper 100 can be fixed to the long ruler 60 with a simple configuration.

As shown in FIG. 6, the stopper main body 110 includes two accommodating portions 116 in the form of an internal space of the protruding portion 113. The accommodating portion 116 is located near both ends of the protruding portion 113 in the longitudinal direction D1. Each of the accommodating portions 116 accommodates a permanent magnet 150. As shown in FIGS. 3 and 6, the accommodating portion 116 communicates with the outside by an opening 114 formed in the bottom surface of the protruding portion 113. The opening 114 has the same size as the accommodating portion 116. As shown in FIGS. 3 and 5, a barb 115 is formed in the center of the opening 114 in the lateral direction D2. At the upper end of the return 115, the width of the accommodating portion 116 in the longitudinal direction D1 is limited to substantially the same width as the permanent magnet 150. Therefore, the permanent magnet 150 can be pushed into the accommodating portion 116 from below through the opening 114 and inserted, but once the permanent magnet 150 is accommodated in the accommodating portion 116, the permanent magnet 150 is inserted by the return 115. It will be stuck. According to this configuration, the permanent magnet 150 is held by the stopper 100 with a simple structure.

In this permanent magnet 150, the stopper 100 can slide on the long ruler 60 integrally with the base 20 in a state where the knob screw 120 is loosened and the base 20 of the circular saw 10 and the stopper 100 are in contact with each other. As described above, it is provided so as to be connectable with the base 20. For this purpose, a ferromagnet is attached to a portion of the base 20 that can come into contact with the stopper 100. The ferromagnet may be attached to the base 20 by any method such as a clip, double-sided tape, or an adhesive.

An example of a method for performing plunge cutting using the stopper 100, the long ruler 60, and the circular saw 10 described above will be described below with reference to FIGS. 9 to 15. In this embodiment, two stoppers 100 having the above-described configuration are used. That is, two stoppers 100 having the same configuration are used. Of the two stoppers 100, one is placed in front of the circular saw 10 and the other is placed behind the circular saw 10. Therefore, in the following description, for convenience, the stopper 100 arranged in front of the circular saw 10 is referred to as a front stopper 100a, and the stopper 100 arranged behind the circular saw 10 is referred to as a rear stopper 100b.

In the following, as shown in FIG. 9, the work of performing plunge cutting from the cutting start position P1 to the cutting end position P2 along the black line 91a of the black lines 91 attached on the material to be cut 90 is illustrated. The black line 91 has a rectangular shape, and the black line 91a corresponds to one side of the rectangle. In order to perform the plunge cutting operation, the user first aligns the long ruler 60 and the chalk line 91a and fixes the long ruler 60 to the material to be cut 90, as shown in FIGS. 9 and 10. This fixing operation can be performed by using any known fixing means (not shown).

Next, the user places the circular saw 10 on the long ruler 60. Next, the user places the front stopper 100a and the rear stopper 100b on the long ruler 60 so that the protruding portion 112 of the stopper 100 and the pressing member 130 are arranged in the guide groove portion 62 of the long ruler 60. do. At this time, the knob screws 120 of the front stopper 100a and the rear stopper 100b are loosened, and the front stopper 100a and the rear stopper 100b can slide on the long ruler 60 along the longitudinal direction D1.

Next, the user brings the front stopper 100a and the rear stopper 100b into contact with the base 20 as shown in FIGS. 9 to 11. As a result, the front stopper 100a and the rear stopper 100b become the base 20 due to the attractive force acting between the permanent magnets 150 of the front stopper 100a and the rear stopper 100b and the ferromagnet attached to the base 20. It is integrally slidable and connected to the base 20.

In this state, as shown in FIG. 10, the user moves the circular saw 10 so that the position of the marker 41 indicating the front end position at the bottom dead center of the saw blade and the cutting end position P2 coincide with each other. As described above, since the front stopper 100a and the rear stopper 100b are connected to the base 20, when the circular saw 10 is moved, the front stopper 100a and the rear stopper 100b also move integrally. Next, the user tightens the knob screw 120 of the front stopper 100a to fix the position of the front stopper 100a with respect to the long ruler 60.

The user then slides the circular saw 10 backwards, as shown in FIGS. 12 and 13. More specifically, as shown in FIG. 12, the user makes the position of the marker 42 (see FIG. 10) representing the rear end position at the bottom dead center of the saw blade coincide with the cutting start position P1. In addition, the circular saw 10 is moved backward. At this time, since the front stopper 100a is fixed to the long ruler 60, the connected state between the front stopper 100a and the base 20 is released against the attractive force of the permanent magnet 150. That is, the front stopper 100a remains at a position where the marker 41 and the cutting end position P2 coincide with each other when the base 20 and the front stopper 100a come into contact with each other. On the other hand, the rear stopper 100b moves backward integrally with the circular saw 10 while maintaining the connected state with the base 20. Next, the user tightens the knob screw 120 of the rear stopper 100b to fix the position of the rear stopper 100b with respect to the long ruler 60.

The user then rotates the saw blade of the circular saw 10 and then displaces the saw blade from top dead center to bottom dead center, as shown in FIG. As a result, cutting of the material to be cut 90 is started. At this time, since the rotating saw blade comes into contact with the material to be cut 90, the circular saw 10 receives a backward reaction force from the material to be cut 90. Even if the user cannot withstand this reaction force, the backward movement of the circular saw 10 is restricted by the rear stopper 100b in contact with the base 20, so that the circular saw 10 is against the user's intention. Therefore, it does not move to a position for cutting behind the cutting start position P1.

The user then slides the circular saw 10 forward until the base 20 abuts on the front stopper 100a, as shown in FIG. As described above, the front stopper 100a is fixed at a position where the marker 41 and the cutting end position P2 coincide with each other, so that the circular saw 10 naturally stops at an accurate desired position. Therefore, the user can move the circular saw 10 to the desired position without the need for careful visual confirmation. The user then stops the rotation of the saw blade and then returns the saw blade from bottom dead center to top dead center. In this way, the plunge cut along the chalk line 91a is completed.

According to the circular saw 10, the long ruler 60, and the stopper 100 described above, the user can perform a plunge cut along the chalk line 91a with accurate position accuracy by performing a very simple operation. Moreover, since the two stoppers 100 are separate parts, they are compact and easy to handle.

Further, since the stopper 100 is entirely formed of a rigid body, the stopper 100 does not deform even if either the front side or the rear side of the stopper 100 collides with the base 20. Therefore, the user may use either of the two stoppers 100 as the front stopper 100a, and similarly, any of the two stoppers 100 may be used as the rear stopper 100b. Therefore, the user does not need to handle the two stoppers 100 separately. Further, since the permanent magnets 150 are provided at both ends in the longitudinal direction D1, the same effect can be obtained.

Further, since two stoppers 100 having the same configuration are used, the manufacturing process thereof can be simplified. However, two stoppers having different configurations may be used.

Further, since the stopper 100 is configured to be slidable integrally with the base 20 by the permanent magnet 150, it is not necessary to individually move the circular saw 10 and the stopper 100 in place when positioning them.

Although the embodiments of the present invention have been described above, the above-described embodiments are for facilitating the understanding of the present invention and do not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention includes an equivalent thereof. In addition, in the scope of claims and any combination of each element described in the specification, or any omission, within the range in which at least a part of the above-mentioned problems can be solved, or in the range in which at least a part of the effect is exhibited. It is possible.

For example, as a fixing mechanism for fixing the stopper 100 to the long ruler 60, any structure and type may be adopted instead of the above-mentioned knob screw 120 and the pressing member 130. For example, a knob screw and a pressing member configured to sandwich the convex portion 61 of the long ruler 60 in the lateral direction may be adopted. Alternatively, a spring clamp may be used instead of the threaded structure.

Further, as the connecting structure that allows the stopper 100 to slide integrally with the base 20, any structure and type may be adopted in place of the above-mentioned permanent magnet 150. For example, a hook that can be connected to the stopper 100 and the base 20 may be used.

Further, it is not always necessary to use the two stoppers 100 at the same time, and only one of the front stopper 100a and the rear stopper 100b may be used. For example, only the rear stopper 100b may be used. In this case, the stop position of the forward movement of the circular saw 10 in the plunge cut may be determined by visual confirmation as in the conventional case.

Further, instead of the two stoppers 100 as separate parts, an integrated stopper device in which two stoppers capable of adjusting the distance to each other are connected may be used. In this case, for example, the two stoppers may be connected by a telescopic rod.

Further, the various forms described above can be applied not only to plunge round saws but also to various portable processing machines for performing plunge processing. Such a portable processing machine may be, for example, a plunge type grooving cutter, a router, or the like.

10 ... Circular saw 20 ... Base 30 ... Main body 40 ... Cover 41, 42 ... Marker 60 ... Long ruler 61 ... Convex part 62 ... Guide groove part 63 .. Concave part 64 ... Guide groove upper end 90 ... Cut material 91, 91a ... Chalk line 100 ... Stopper 100a ... Front stopper 100b ... Rear stopper 110 ... Stopper body 111. .. Upper part 112, 113 ... Protruding part 114 ... Opening 115 ... Return 116 ... Accommodating part 117 ... Through hole 120 ... Knob screw 121 ... Knob part 122 ... Shaft Part 130 ... Pressing member 131 ... Screw hole 140 ... Washer 150 ... Permanent magnet D1 ... Longitudinal direction D2 ... Short direction P1 ... Cutting start position P2 ... Cutting end position

Claims (13)

A stopper device for use with a portable processing machine having a base for contacting the work material and a long ruler.
A first stopper for restricting the movement of the portable processing machine along the longitudinal direction of the long ruler by contact with the base, and
A second stopper for restricting the movement of the portable processing machine along the longitudinal direction of the long ruler by contact with the base, and
Equipped with
The stopper device is a stopper device configured to be attached to the long ruler so that the distance between the first stopper and the second stopper in the longitudinal direction of the long ruler can be adjusted. The stopper device according to claim 1.
Each of the first stopper and the second stopper is a separate component separated from each other.
The first stopper has a first fixing mechanism for fixing to the long ruler so that it can be released from fixing.
The second stopper is a stopper device having a second fixing mechanism for fixing to the long ruler so that it can be released from fixing. The stopper device according to claim 2.
Each of the first fixing mechanism and the second fixing mechanism
A knob screw having a shaft portion on which a male screw is formed and a pressing member having a screw hole to be screwed into the male screw are provided.
A stopper device configured so that a predetermined portion of the long ruler can be sandwiched between the knob screw and the pressing member by tightening the knob screw. The stopper device according to any one of claims 1 to 3.
Each of the first stopper and the second stopper is a stopper device formed of a rigid body. The stopper device according to any one of claims 1 to 4.
The first stopper and the second stopper are stopper devices having the same configuration as each other. The stopper device according to any one of claims 1 to 5.
Each of the first stopper and the second stopper is a stopper device including a connecting portion configured to be connectable to the base so as to be able to slide on the long ruler integrally with the base. The stopper device according to any one of claims 1 to 6.
The connecting portion of each of the first stopper and the second stopper is on the first side in the longitudinal direction with the first stopper and the second stopper attached to the long ruler. A stopper device including a first connecting portion to be arranged and a second connecting portion to be arranged on a second side opposite to the first side. A stopper for use with a portable processing machine having a base for contacting the work material and a long ruler.
It is configured to be attachable to the long ruler in order to regulate the movement of the portable processing machine along the longitudinal direction of the long ruler by contact with the base.
A stopper provided with a connecting portion configured to be connectable to the base so that it can slide on the long ruler integrally with the base. The stopper device according to claim 6 or 7, or the stopper according to claim 8.
The connecting portion is a stopper device or a stopper provided with a permanent magnet. The stopper device or stopper according to claim 9.
A stopper device or a stopper that is an accommodating portion into which the permanent magnet can be inserted and includes an accommodating portion that accommodates the permanent magnet in a state where the permanent magnet is prevented from coming off from the accommodating portion. It is an accessory set to be used with a portable processing machine.
The stopper device or stopper according to any one of claims 1 to 10.
An accessory set with the long ruler. It is a method of performing plunge processing using a portable processing machine having a base for contacting with a work material and a long ruler.
The first step of plunging the work material while moving the portable processing machine from the processing start position to the processing end position along the longitudinal direction of the long ruler.
Prior to the first step, the stopper is such that when the portable processing machine is in the processing start position, it comes into contact with the base behind the portable processing machine in the moving direction of the portable processing machine. In the second step of attaching the long ruler to the long ruler,
Equipped with
A method in which the plunge processing is started in a state where the stopper attached by the second step and the base are in contact with each other in the first step. It is a method of performing plunge processing using a portable processing machine having a base for contacting with a work material and a long ruler.
The first step of plunging the work material while moving the portable processing machine from the processing start position to the processing end position along the longitudinal direction of the long ruler.
Prior to the first step, the stopper is such that when the portable processing machine is in the processing end position, the portable processing machine comes into contact with the base in front of the portable processing machine in the moving direction of the portable processing machine. In the second step of attaching the long ruler to the long ruler,
Equipped with
A method in which the plunge processing is performed by moving the portable processing machine until the stopper attached by the second step and the base come into contact with each other in the first step.

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