Portable processing machine

Abstract

To provide an auxiliary fixing mechanism for a portable processing machine in which an auxiliary such as a parallel rule can be fixed to a base of the portable processing machine and which is excellent in repairability.SOLUTION: An auxiliary fixing mechanism 20 for a portable processing machine in which a parallel rule can be fixed to a base 2 of a portable processing machine 1, includes a pressing member 22 which is installed on the base 2 to press the parallel rule to the base 2. The auxiliary fixing mechanism 20 includes an intervention member 23 which is intervened between the pressing member 22 and the parallel rule. The intervention member 23 includes an engagement part 28 which is releasably engaged with the base 2. When the engagement part 28 is disengaged from the base 2, the intervention member 23 can be removed from the base 2 without removing the pressing member 22 from the base 2.SELECTED DRAWING: Figure 6

Description

Technical Field

[0005]

[0001] The present invention relates to an auxiliary tool fixing mechanism for a portable processing machine that fixes an auxiliary tool such as a parallel ruler to the base of the portable processing machine, for example.

Background Art

[0002] For example, a portable processing machine called a portable marquetry has a base that is substantially rectangular plate-shaped with a flat lower surface, and a processing machine body supported above the base. The processing machine body rotatably supports a substantially disc-shaped cutting tool. The cutting tool protrudes below the lower surface of the base from a window provided in the base. The user brings the lower surface of the base into contact with the workpiece, and moves the portable processing machine in the cutting direction (forward) along the side surface of the cutting tool while rotating the cutting tool. Thereby, the cutting tool protruding downward from the lower surface of the base cuts the workpiece such as wood along the cutting direction.

[0003] Conventionally, a parallel ruler having a ruler body with a guide surface that can contact the side surface of the workpiece and a connecting bar that supports the ruler body and can be connected to the base is known. The parallel ruler is connected to the base in a posture where the guide surface is parallel to the side surface of the cutting tool. The connecting bar is fixed to the base with the guide surface in contact with the side surface of the workpiece. The user moves the portable processing machine in the cutting direction along the guidance of the guide surface. Thereby, the cutting tool can cut the workpiece with a predetermined width.

[0004] The base has a support portion for releasably fixing the connecting bar. A male screw-shaped pressing member is attached to the support portion. The pressing member is fastened to the support portion with an intervening member sandwiched between the upper surface of the connecting bar. By fastening the pressing member, the connecting bar is pressed by the pressing member via the intervening member. Thereby, the connecting bar is fixed to the base at an arbitrary position.

[0005] As described in Patent Document 1, conventional auxiliary device fixing mechanisms have an intervening member made of a roughly C-shaped sheet metal material. Figure 21 shows the intervening member 51 of a conventional auxiliary device fixing mechanism 50. The intervening member 51 has a bottom portion 52 into which the tip of the pressing member is pressed, a top portion 53 having a through hole through which the pressing member is inserted, and a connecting portion 54 that connects the bottom portion 52 and the top portion 53 vertically. The bottom portion 52 has a pressing surface 52a that contacts the tip of the pressing member and a bent portion 52b that bends slightly upward on the opposite side of the connecting portion 54. A through hole 53a that penetrates vertically is provided in the center of the top portion 53. The tip 53b of the top portion 53 extends to approximately the same left-right position as the bent portion 52b.

[0006] To attach the intervening member 51 to the support portion of the base, the pressing member must be inserted through both the support portion of the base and the through hole 53a of the intervening member 51. To remove the intervening member 51 from the support portion of the base, the pressing member must be removed from both the support portion of the base and the through hole 53a of the intervening member 51. Therefore, replacing the intervening member is time-consuming, and there was room for improvement in repairability. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2021-183367 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] Therefore, there is a need for a portable processing machine auxiliary equipment fixing mechanism that can secure auxiliary tools such as parallel rulers to the base of the portable processing machine and that is easy to repair. [Means for solving the problem]

[0009] One feature of this disclosure relates to an auxiliary device fixing mechanism for a portable processing machine, which fixes an auxiliary device to the base of the portable processing machine. The auxiliary device fixing mechanism has a pressing member that is attached to the base and presses the auxiliary device against the base. The auxiliary device fixing mechanism has an intervening member interposed between the pressing member and the auxiliary device. The intervening member has an engaging portion that releasably engages with the base. By disengaging the engaging portion from the base, the intervening member can be removed from the base without removing the pressing member from the base.

[0010] Therefore, the intervening member can be attached to the support while the pressing member remains attached to the support. The intervening member can be removed from the support while the pressing member remains attached to the support. As a result, the intervening member can be replaced without removing the pressing member from the support. This improves the repairability of the auxiliary device fixing mechanism for portable processing machines. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view of a portable machining center with a parallel guide attached. [Figure 2] This is a perspective view of a parallel ruler. [Figure 3] This is a top view of the front part of the base of a portable processing machine according to the first embodiment. [Figure 4] This is a cross-sectional view taken along the line IV-IV in Figure 3. [Figure 5] This is an exploded perspective view of the base and pressing member according to the first embodiment. [Figure 6] This is a perspective view of the auxiliary device fixing mechanism according to the first embodiment, viewed from the front left. [Figure 7] This is a perspective view showing the auxiliary device fixing mechanism with the intervening member removed. [Figure 8] This is a perspective view of the auxiliary device fixing mechanism, seen from the front right side. [Figure 9] This is a perspective view of the intervening member according to the first embodiment. [Figure 10] This is a top view of the intervening member. [Figure 11]It is a cross-sectional view showing a support portion when an intervening member is attached in the cross-section along line IV-IV in FIG. 3. [Figure 12] It is a cross-sectional view of an auxiliary instrument fixing mechanism in the cross-section along line IV-IV in FIG. 3. [Figure 13] It is a perspective view of the auxiliary instrument fixing mechanism according to the second embodiment as seen from the front left. [Figure 14] It is a perspective view of an intervening member according to the second embodiment. [Figure 15] It is a top view of the intervening member. [Figure 16] It is a cross-sectional view of the auxiliary instrument fixing mechanism according to the second embodiment in a cross-section corresponding to line IV-IV in FIG. 3. [Figure 17] It is a perspective view of the auxiliary instrument fixing mechanism according to the third embodiment as seen from the front left. [Figure 18] It is a perspective view of an intervening member according to the third embodiment. [Figure 19] It is a top view of the intervening member. [Figure 20] It is a cross-sectional view of the auxiliary instrument fixing mechanism according to the third embodiment in a cross-section corresponding to line IV-IV in FIG. 3. [Figure 21] It is a perspective view of an intervening member of a conventional example.

Embodiments for Carrying out the Invention

[0012] According to another feature of the present disclosure, the base has a support portion to which a pressing member is attached. The base has an auxiliary instrument receiving portion that allows the auxiliary instrument to be inserted horizontally below the support portion. The intervening member has a top portion that abuts on the upper surface of the support portion. The intervening member has a bottom portion that abuts on the lower surface of the support portion and is pushed downward by the pressing member. The intervening member has a connecting portion that connects the top portion and the bottom portion and sandwiches the support portion between the top portion and the bottom portion. Therefore, the intervening member is held on the support portion by utilizing the elastic force by which the top portion and the bottom portion sandwich the support portion. Thus, the mounting state of the intervening member attached to the support portion can be stabilized. Also, the intervening member can be held on the support portion without providing a structure for preventing the intervening member from coming off the pressing member.

[0013] According to other features of this disclosure, the base has a support portion to which a pressing member is attached. The base has a side wall that protrudes upward at a location closer to the side edge of the base than the support portion. The intervening member is attached to the support portion from the side edge side. The engaging portion of the intervening member faces the side wall and prevents it from coming off the support portion. Therefore, by positioning the engaging portion of the intervening member against the side wall of the base, the intervening member is less likely to come off the support portion unintentionally. This makes it possible to improve the stability of the attachment state of the intervening member to the support portion.

[0014] According to other features of this disclosure, the intervening member has a top portion that abuts against the upper surface of the support portion. The intervening member has a bottom portion that abuts against the lower surface of the support portion. The intervening member has a connecting portion that connects the top portion and the bottom portion. The intervening member has an arm portion that extends from the lateral edge of the connecting portion. The engaging portion of the intervening member is provided at the lower part of the arm portion. Therefore, by being provided at the lower part of the arm portion, the engaging portion is located near the upper surface of the base. As a result, the engaging portion engages with the base and is difficult to disengage. This makes it difficult for the intervening member to be unintentionally removed from the support portion.

[0015] According to other features of this disclosure, the arm extends away from the side wall of the base, starting from the transverse edge of the connecting portion. The engaging portion protrudes toward the side wall from the lower part of the arm. Therefore, the engaging portion and the arm stand substantially vertically. For example, when the intervening member moves substantially horizontally toward the side wall of the base, the tip of the engaging portion faces the side wall of the base in a vertically elongated position. Therefore, the engaging portion easily catches on the side wall of the base. This makes it difficult for the intervening member to come off the support portion unintentionally. Moreover, the engaging portion is supported by the arm that extends in the opposite direction to the engaging portion. Therefore, the rigidity of the engaging portion is reinforced by the arm. This makes it possible to stabilize the retention of the intervening member by the engaging portion.

[0016] According to other features of this disclosure, a lower notch is provided between the arm and the base. An upper notch is provided between the arm and the top. Therefore, the arm is elastically supported at the connecting part in a cantilevered state. Thus, the elasticity of the arm can be used to engage the engaging part with the side wall of the base. This prevents the intervening member from unintentionally coming off the support part. In addition, the intervening member can be removed from the support part by pulling it toward the side wall of the base with a force stronger than the elastic force of the arm. This improves the repairability of the auxiliary device fixing mechanism.

[0017] According to other features of this disclosure, the engaging portion of the intervening member protrudes downward from the tip of the top portion and faces the side surface of the support portion. Therefore, a structure for holding the intervening member in place of the support portion can be simply formed. This improves the manufacturability of the product.

[0018] According to other features of this disclosure, the engaging portion of the intervening member protrudes upward from the bottom. The support portion of the base has a protrusion that protrudes downward and faces the engaging portion of the intervening member, thereby preventing the intervening member from detaching from the base. Therefore, the engaging portion can be provided by processing the bottom without increasing the size of the intervening member. This helps to suppress an increase in material costs.

[0019] According to other features of this disclosure, the intervening member has a projection that protrudes upward from the bottom. The projection faces the lower end of the pressing member, thereby restricting the intervening member from coming off the base. Therefore, the projection can be provided without increasing the size of the intervening member. Thus, an increase in material costs can be suppressed.

[0020] According to other features of this disclosure, the engaging portion and / or protruding portion have a shape in which a part of the bottom is cut up and have an inclination angle that is located higher the closer they are to the connecting portion. Therefore, when moving the intervening member in the mounting direction (opposite direction from the connecting portion), the engaging portion is less likely to catch on the protrusion of the base. Also, the protruding portion is less likely to catch on the lower end of the pressing member. As a result, the intervening member can be smoothly attached to the support portion. On the other hand, when attempting to move the intervening member in the removal direction (direction in which the connecting portion is provided), the engaging portion is more likely to catch on the protrusion of the base. Also, the protruding portion is more likely to catch on the lower end of the pressing member. As a result, it is possible to prevent the intervening member from unintentionally coming off the support portion.

[0021] One embodiment of the present disclosure will be described with reference to Figures 1 to 12. The auxiliary tool fixing mechanism 20 of this embodiment is provided on a portable processing machine 1, which is a type of portable cutting machine and is called a portable circular saw. As shown in Figures 1 and 4, the portable processing machine 1 has a substantially rectangular plate-shaped base 2 and a processing machine body 3 supported above the base 2. The processing machine body 3 has a substantially disc-shaped cutting tool 5 that is rotatably supported, an electric motor 4 as a drive source for rotating the cutting tool 5, and a handle portion 3a for the user to grip. The cutting tool 5 is a substantially disc-shaped circular saw blade called a tipped saw blade. The cutting tool 5 protrudes from the window portion 2a below the lower surface of the base 2.

[0022] As shown in Figures 1 and 4, the portable cutting machine 1 has a fixed cover 6 and a movable cover 7 that cover the cutting tool 5. The fixed cover 6 is fixed to the machine body 3 and covers the upper half circumference of the cutting tool 5. The movable cover 7 can be opened and closed between a closed position that covers the lower half circumference of the cutting tool 5 that protrudes downward from the lower surface of the base 2 and an open position that exposes the lower half circumference of the cutting tool 5. The user moves the portable cutting machine 1 forward by gripping the handle 3a with the lower surface of the base 2 in contact with the upper surface of the workpiece W. The movable cover 7 rotates in the open position direction when it comes into contact with the workpiece W. This exposes the lower half circumference of the cutting tool 5, allowing the cutting tool 5 to cut into the workpiece. Thus, the workpiece W is cut in the cutting direction in which the portable cutting machine 1 is moved. In the following description, the front side in the cutting direction is referred to as the front, and the side in relation to the portable cutting machine 1 where the user is positioned is referred to as the rear. The up, down, left, and right directions are defined from the perspective of the user located behind the portable processing machine 1 (to the far right in Figure 1).

[0023] The parallel guide 10 shown in Figures 2 and 4 is an auxiliary tool for a portable processing machine. The parallel guide 10 has a guide body 12 and a connecting bar 11 that supports the guide body 12 and can be connected to a base 2. The guide body 12 has a flat guide surface 12a that contacts the side surface of the workpiece W. The connecting bar 11 has a curved portion 11c that is curved in a U shape when viewed from the front and rear directions, and a tip portion 11d that bends downward at the tip of the curved portion 11c. The guide body 12 is integrally connected to the tip portion 11d. The bar body portion of the connecting bar 11 has a rectangular cross-section and extends in a straight line. The upper surface 11a and the lower surface 11b of the connecting bar 11 extend parallel to each other.

[0024] As shown in Figures 3 and 4, the front of the base 2 is provided with auxiliary device receiving sections 2c and 2d for inserting the connecting bar 11 horizontally. Near the left side edge of the base 2, a side wall 2b is provided that rises vertically. The side wall 2b is provided with a notched groove-shaped auxiliary device receiving section 2c. The auxiliary device receiving section 2c is formed in a roughly U-shape with an open top. On the right side of the base 2, the side wall that rises vertically is provided with a rectangular through-hole-shaped auxiliary device receiving section 2d. The auxiliary device receiving section 2d is provided at the same front-to-back position as the auxiliary device receiving section 2c. The connecting bar 11 is inserted from the right auxiliary device receiving section 2d to the left auxiliary device receiving section 2c. This allows the parallel ruler 10 to be supported so that it can slide horizontally relative to the base 2. The guide surface 12a of the ruler body 12 is located below the bottom surface of the base 2 when it is attached to the base 2. The guide surface 12a of the ruler body 12 extends in the front-to-back and up-to-down directions when mounted on the base 2 and is parallel to the side surface of the cutting tool 5.

[0025] As shown in Figures 3 and 4, the base 2 has an auxiliary tool fixing mechanism 20 for fixing the parallel ruler 10 at any left or right position. The auxiliary tool fixing mechanism 20 is provided near the right side of the auxiliary tool receiving section 2c at approximately the same front-to-back position as the auxiliary tool receiving section 2c. The auxiliary tool fixing mechanism 20 has a support section 21 through which the connecting bar 11 is inserted, a pressing member 22 that presses the upper surface 11a of the connecting bar 11 from above, and an intervening member 23 that is interposed between the upper surface 11a of the connecting bar 11 and the pressing member 22. The pressing member 22 and the intervening member 23 are attached to the support section 21. The connecting bar 11 is moved to any left or right position, and the upper surface 11a of the connecting bar 11 is pressed with the pressing member 22. As a result, the parallel ruler 10 is fixed to the base 2 at any left or right position. At this time, the guide surface 12a is fixed at a predetermined distance in the left-right direction relative to the cutting tool 5. Therefore, the cutting tool 5 can cut the workpiece W with a predetermined width corresponding to the distance between the cutting tool 5 and the guide surface 12a in the left-right direction.

[0026] As shown in Figures 5 and 12, the support portion 21 is provided in a substantially rectangular box shape that protrudes upward from the upper surface of the base 2. A hollow passage C through which the connecting bar 11 can be inserted is provided at the lower part of the support portion 21. The support portion 21 has an upper surface 21a that extends horizontally and a lower surface 21b that corresponds to the upper end surface of the hollow passage C. The support portion 21 has a side surface 21c that stands upright in the vertical direction at the left end, a side surface 21d that stands upright in the vertical direction at the right end, a front surface 21i that stands upright in the vertical direction at the front end, and a rear surface 21j that stands upright in the vertical direction at the rear end. A through hole 21e that penetrates in the vertical direction is provided in the upper surface 21a. Inside the support portion 21, a nut retaining recess 21f is provided that connects to the lower end of the through hole 21e. The nut retaining recess 21f holds the nut 22c, which will be described later, in place to prevent it from rotating. The lower surface 21b is provided with a projection 21g that protrudes downward on the outer circumference of the nut-holding recess 21f. The projection 21g has a mountain-like shape with a roughly triangular cross-section and its apex at the lower end. The outer circumference of the projection 21g is provided with an inclined surface 21h that slopes upward toward the outside of the support portion 21.

[0027] As shown in Figures 3 and 5, an engaging surface 2e is provided on the left side wall 2b of the base 2, along the right opening edge of the auxiliary device receiving section 2c. A total of two engaging surfaces 2e are provided, one in front of the auxiliary device receiving section 2c and one behind. The engaging surfaces 2e are planar in shape, extending in the left-right and up-down directions. The engaging surfaces 2e are positioned at approximately the same front-rear position as the front surface 21i and rear surface 21j of the support section 21.

[0028] As shown in Figures 5, 7, and 12, the pressing member 22 has a male screw 22a and a nut 22c that screws onto the male screw 22a. A knob operating part 22b for the user to rotate is provided on the upper part of the male screw 22a. The male screw 22a is inserted from above into the through hole 21e of the support part 21. The nut 22c is inserted into the nut holding recess 21f inside the support part 21 and fastened with the male screw 22a. The nut 22c is prevented from rotating by the nut holding recess 21f. Therefore, when the knob operating part 22b is rotated in the tightening direction, the male screw 22a moves downward. The lower end 22d of the male screw 22a presses against the upper surface 11a of the connecting bar 11 which is inserted into the hollow passage C of the support part 21. The movement of the connecting bar 11 relative to the base 2 is restricted by the pressing force of the pressing member 22. When the knob operating part 22b is rotated in the loosening direction, the male screw 22a moves upward. As a result, the pressing force that the lower end 22d of the male screw 22a presses against the upper surface 11a of the connecting bar 11 is released. With the pressing force released, the connecting bar 11 becomes movable in the left-right direction relative to the base 2.

[0029] As shown in Figures 6, 8, and 9, the intervening member 23 is formed by processing a sheet metal material. The intervening member 23 has a roughly rectangular flat bottom portion 24 located at the bottom, a roughly rectangular flat top portion 25 located at the top, and a connecting portion 26 that connects the bottom portion 24 and the top portion 25 vertically. The bottom portion 24, the top portion 25, and the connecting portion 26 are roughly C-shaped when viewed from the front-to-back direction. The upper surface of the bottom portion 24 is provided with a pressing surface 24a that abuts against the lower end 22d of the pressing member 22. The right end of the bottom portion 24 is provided with a bent portion 24b that bends slightly upward. The top portion 25 extends to the right from the connecting portion 26 to a length where its tip 25a does not abut against the male screw 22a attached to the support portion 21. When the intervening member 23 is attached to the support portion 21, the tip 25a is located at approximately the same left-right position as the left end of the through hole 21e (see Figure 12).

[0030] As shown in Figures 9 and 10, horizontal edges 26a are provided at the front and rear ends of the connecting portion 26. The horizontal edges 26a have a vertical length shorter than the total height of the connecting portion 26 and are provided approximately in the center of the connecting portion 26 in the vertical direction. An arm portion 27 is provided at the tip of the horizontal edge 26a, which is bent approximately vertically toward the right. The arm portion 27 is a flat plate shape that extends in the left-right and up-down directions. A total of two arm portions 27 are provided, one at the front and one at the rear of the intervening member 23. The arm portion 27 is supported by the horizontal edge 26a of the connecting portion 26 at its left end base portion 27a. The upper end and top portion 25 of the arm portion 27 are spaced apart from each other, and an upper notch 23a is formed between them. The lower end and bottom portion 24 of the arm portion 27 are spaced apart from each other, and a lower notch 23b is formed between them.

[0031] As shown in Figure 9, the arm portion 27 has a lower portion 27b that extends downward from the base portion 27a. An engaging portion 28 extending to the left is provided at the left end of the lower portion 27b. The arm portion 27 and the engaging portion 28 are provided in a single, planar shape. The engaging portion 28 is a substantially rectangular shape with its corners chamfered in an arc shape when viewed from the front-to-back direction. The tip of the engaging portion 28 protrudes to the left of the connecting portion 26. A substantially C-shaped notch is formed between the engaging portion 28 and the base portion 27a when viewed from the front-to-back direction.

[0032] The following describes the process of attaching the intervening member 23 to the support part 21 with reference to Figures 6, 8, 11, and 12. First, the pressing member 22 is attached to the support part 21 by fastening the male screw 22a and nut 22c. The intervening member 23 can be attached to or removed from the support part 21 while the pressing member 22 is attached to the support part 21. The bottom part 24 is inserted into the hollow passage C below the support part 21 from the auxiliary device receiving part 2c side. At this time, the intervening member 23 is tilted so that the bottom part 24 extends downward to the right, so that the pressing surface 24a conforms to the inclined surface 21h (see Figure 11). With the tip 25a of the top part 25 in contact with the upper surface 21a, the bottom part 24 is inserted further to the right. The intervening member 23 rotates with the tip 25a as the pivot point, so that the bottom part 24 and the top part 25 become approximately horizontal. The intervening member 23 is attached to the support portion 21 while undergoing elastic deformation.

[0033] With the intervening member 23 attached to the support portion 21, the pressing surface 24a of the bottom portion 24 abuts against the lower surface 21b of the support portion 21. The bent portion 24b protrudes to the right of the support portion 21 from the hollow passage C. The top portion 25 abuts against the upper surface 21a of the support portion 21. The connecting portion 26 extends vertically following the side surface 21c of the support portion 21. The bottom portion 24 and the top portion 25 clamp the support portion 21 vertically, restricting the vertical movement of the intervening member 23 relative to the support portion 21. The pair of arm portions 27 extend horizontally, following the front surface 21i or rear surface 21j of the support portion 21, respectively. The pair of engaging portions 28 face the side wall 2b of the base 2 and abut against the lower part of the engaging surface 2e. The pair of engaging portions 28 contact the pair of engaging surfaces 2e, thereby restricting the leftward movement of the intervening member 23 relative to the support portion 21. This prevents the intervening member 23 from detaching. The pair of engaging portions 28 are positioned with a gap in the front-rear direction so that the pair of engaging surfaces 2e are positioned between them in the front-rear direction. This also prevents the intervening member 23 from moving in the front-rear direction relative to the support portion 21.

[0034] To remove the intervening member 23 from the support portion 21, the left end of the intervening member 23 is lifted upward and to the left, as shown in Figure 11, in the reverse order of installation, and the intervening member 23 is tilted and removed. The intervening member 23 is pulled with a force sufficiently greater than the elastic force of the intervening member 23. This allows the intervening member 23 to be removed from the support portion 21 while elastically deforming it.

[0035] As described above, the auxiliary tool fixing mechanism 20 for the portable processing machine 1, which fixes the parallel ruler 10 to the base 2 of the portable processing machine, has a pressing member 22 that is attached to the base 2 and presses the parallel ruler 10 against the base 2, as shown in Figures 1 and 4. The auxiliary tool fixing mechanism 20 has an intervening member 23 that is interposed between the pressing member 22 and the parallel ruler 10. The intervening member 23 has an engaging portion 28 that releasably engages with the base 2. By disengaging the engaging portion 28 from the base 2, the intervening member 23 can be removed from the base 2 without removing the pressing member 22 from the base 2.

[0036] Therefore, the intervening member 23 can be attached to the support portion 21 while the pressing member 22 remains attached to the support portion 21. The intervening member 23 can be removed from the support portion 21 while the pressing member 22 remains attached to the support portion 21. As a result, the intervening member 23 can be replaced without removing the pressing member 22 from the support portion 21. This improves the repairability of the auxiliary device fixing mechanism 20 for portable processing machines.

[0037] As shown in Figures 6 and 12, the base 2 has a support portion 21 to which the pressing member 22 is attached. The base 2 has an auxiliary device receiving portion 2c below the support portion 21 that allows the parallel ruler 10 to be inserted horizontally. The intervening member 23 has a top portion 25 that abuts against the upper surface 21a of the support portion 21. The intervening member 23 has a bottom portion 24 that abuts against the lower surface 21b of the support portion 21 and is pressed downward by the pressing member 22. The intervening member 23 has a connecting portion 26 that connects the top portion 25 and the bottom portion 24, causing the support portion 21 to be sandwiched between the top portion 25 and the bottom portion 24. Therefore, the elastic force of the top portion 25 and the bottom portion 24 sandwiching the support portion 21 is used to hold the intervening member 23 to the support portion 21. As a result, the mounting state of the intervening member 23 attached to the support portion 21 can be stabilized. Furthermore, the intervening member 23 can be held in the support portion 21 without providing a structure on the pressing member 22 to prevent the intervening member 23 from coming off.

[0038] As shown in Figures 6 and 8, the base 2 has a support portion 21 to which the pressing member 22 is attached. The base 2 has a side wall 2b that protrudes upward at a location closer to the side edge of the base 2 than the support portion 21. The intervening member 23 is attached to the support portion 21 from the side edge side. The engaging portion 28 of the intervening member 23 faces the side wall 2b and prevents it from coming off the support portion 21. Therefore, by positioning the engaging portion 28 of the intervening member 23 against the side wall 2b of the base 2, the intervening member 23 is less likely to come off the support portion 21 unintentionally. This makes it possible to improve the stability of the attachment state of the intervening member 23 to the support portion 21.

[0039] As shown in Figures 6, 8, and 12, the intervening member 23 has a top portion 25 that abuts against the upper surface 21a of the support portion 21. The intervening member 23 has a bottom portion 24 that abuts against the lower surface 21b of the support portion 21. The intervening member 23 has a connecting portion 26 that connects the top portion 25 and the bottom portion 24. The intervening member 23 has an arm portion 27 that extends from the horizontal edge 26a of the connecting portion 26. The engaging portion 28 of the intervening member 23 is provided on the lower part 27b of the arm portion 27. Therefore, by being provided on the lower part 27b of the arm portion 27, the engaging portion 28 is located close to the upper surface of the base 2. As a result, the engaging portion 28 engages with the base 2 and is difficult to disengage. This makes it difficult for the intervening member 23 to be unintentionally removed from the support portion 21.

[0040] As shown in Figures 6 and 8, the arm portion 27 extends away from the side wall 2b of the base 2, starting from the horizontal edge 26a of the connecting portion 26. The engaging portion 28 protrudes toward the side wall 2b from the lower part 27b of the arm portion 27. Therefore, the engaging portion 28 and the arm portion 27 stand almost vertically. For example, when the intervening member 23 moves almost horizontally in the left-right direction toward the side wall 2b of the base 2, the tip of the engaging portion 28 faces the side wall 2b of the base 2 in a vertically elongated position. Therefore, the engaging portion 28 easily catches on the side wall 2b of the base 2. This makes it difficult for the intervening member 23 to come off the support portion 21 unintentionally. Moreover, the engaging portion 28 is supported by the arm portion 27 which extends in the opposite direction to the engaging portion 28. Therefore, the rigidity of the engaging portion 28 is reinforced by the arm portion 27. This stabilizes the retention of the intervening member 23 by the engaging portion 28.

[0041] As shown in Figures 9 and 10, a lower notch 23b is provided between the arm portion 27 and the base portion 24. An upper notch 23a is provided between the arm portion 27 and the top portion 25. Therefore, the arm portion 27 is elastically supported by the connecting portion 26 in a cantilevered state. Thus, the elasticity of the arm portion 27 can be used to engage the engaging portion 28 with the side wall 2b of the base 2 (see Figures 6 and 8). This prevents the intervening member 23 from unintentionally coming off the support portion 21. In addition, the intervening member 23 can be removed from the support portion 21 by pulling it toward the side wall 2b of the base 2 with a force stronger than the elastic force of the arm portion 27. This improves the repairability of the auxiliary device fixing mechanism 20.

[0042] Next, an auxiliary tool fixing mechanism 30 for a portable processing machine according to a second embodiment of this disclosure will be described with reference to Figures 13 to 16. The auxiliary tool fixing mechanism 30 has an intervening member 31 shown in Figure 13 instead of the intervening member 23 shown in Figure 6 of the first embodiment. In the following description, only the configurations that differ from the first embodiment will be described in detail.

[0043] As shown in Figures 13-15, the intervening member 31 is formed by processing a sheet metal material. The intervening member 31 has a roughly rectangular flat bottom portion 32 located at the bottom, a roughly U-shaped flat top portion 33 located at the top, and a connecting portion 34 that connects the bottom portion 32 and the top portion 33 vertically. The bottom portion 32, the top portion 33, and the connecting portion 34 are roughly C-shaped when viewed from the front-to-back direction. The upper surface of the bottom portion 32 is provided with a pressing surface 32a that contacts the lower end 22d of the pressing member 22. The right end of the bottom portion 32 is provided with a bent portion 32b that bends slightly upward.

[0044] As shown in Figures 13 and 16, the top portion 33 extends with a length in the left-right direction that is approximately the same as the upper surface 21a of the support portion 21. A U-shaped groove 33a is provided in the center of the top portion 33. The U-shaped groove 33a has an opening at its right end and a groove bottom on its left side. The U-shaped groove 33a is provided with a width that allows the male screw 22a of the pressing member 22 to pass through. The tip 33b of the top portion 33 is divided by the U-shaped groove 33a into two parts, one in the front and one in the back. Each tip 33b is provided with an engaging portion 35 that bends downward approximately vertically and protrudes.

[0045] As shown in Figures 13 and 16, when the intervening member 31 is attached to the support portion 21, the pressing surface 32a of the bottom portion 32 abuts against the lower surface 21b of the support portion 21. The bent portion 32b protrudes to the right of the support portion 21 from the hollow passage C. The top portion 33 abuts against the upper surface 21a of the support portion 21. The connecting portion 34 extends vertically following the side surface 21c of the support portion 21. The bottom portion 32 and the top portion 33 clamp the support portion 21 in the vertical direction, thereby restricting the vertical movement of the intervening member 31 relative to the support portion 21. The pair of engaging portions 35 face the side surface 21d of the support portion 21 in the left-right direction. The pair of engaging portions 35 and the connecting portion 34 clamp the support portion in the left-right direction. This restricts the leftward movement of the intervening member 31 relative to the support portion 21. Thus, detachment of the intervening member 31 is suppressed.

[0046] When attaching the intervening member 31 to the support part 21, the intervening member 31 moves approximately horizontally from left to right relative to the male screw 22a attached to the support part 21. The male screw 22a moves relative to the intervening member 31, moving from the opening at the right end of the U-shaped groove 33a to the bottom of the groove at the left end. This allows the intervening member 31 to be attached to the support part 21 without removing the pressing member 22 from the support part 21. When removing the intervening member 31 from the support part 21, the intervening member 31 moves approximately horizontally from right to left relative to the male screw 22a. The male screw 22a moves relative to the intervening member 31, moving from the bottom of the groove at the left end of the U-shaped groove 33a to the opening at the right end. This allows the intervening member 31 to be removed from the support part 21 without removing the pressing member 22 from the support part 21.

[0047] As described above, the engaging portion 35 of the intervening member 31 protrudes downward from the tip 33b of the top portion 33 and faces the side surface 21d of the support portion 21, as shown in Figure 16. Therefore, a structure for holding the intervening member 31 to the support portion 21 can be formed simply. This improves the manufacturability of the product.

[0048] Next, an auxiliary tool fixing mechanism 40 for a portable processing machine according to a third embodiment of this disclosure will be described with reference to Figures 17-20. The auxiliary tool fixing mechanism 40 has an intervening member 41 shown in Figure 17, instead of the intervening member 23 shown in Figure 6 of the first embodiment. In the following description, only the configuration that differs from the first embodiment will be described in detail.

[0049] As shown in Figures 17-19, the intervening member 41 is formed by processing a sheet metal material. The intervening member 41 has a roughly rectangular flat bottom portion 42 located at the bottom, a roughly U-shaped flat top portion 43 located at the top, and a connecting portion 44 that connects the bottom portion 42 and the top portion 43 vertically. The bottom portion 42, the top portion 43, and the connecting portion 44 are roughly C-shaped when viewed from the front-to-back direction. The upper surface of the bottom portion 42 is provided with a pressing surface 42a that contacts the lower end 22d of the pressing member 22. The right end of the bottom portion 42 is provided with a bent portion 42b that bends slightly upward.

[0050] As shown in Figure 18, two cut-out holes 42c and 42d are provided in the bottom portion 42. The cut-out holes 42c and 42d are provided side by side in the center of the bottom portion 42 in the front-to-back direction. The cut-out holes 42c and 42d are roughly rectangular when viewed from above. The left cut-out hole 42c is provided with an engaging portion 45 that is cut upward from the sheet metal material of the bottom portion 42. The right end of the engaging portion 45 is integrally connected to the bottom portion 42. The engaging portion 45 has a tip 45a at its left end. The engaging portion 45 extends upward from the right towards the left where the connecting portion 44 is located. The engaging portion 45 is roughly rectangular with its corners chamfered in an arc shape.

[0051] As shown in Figures 18 and 20, a projection 46 is provided in the right-side cut-out hole 42d, which is cut upward from the sheet metal material of the bottom portion 42. The right end of the projection 46 is integrally connected to the bottom portion 42. The projection 46 has a tip 46a at its left end. The projection 46 extends upward from the right towards the left where the connecting portion 44 is located. The projection 46 is provided with substantially the same shape and size as the engaging portion 45.

[0052] As shown in Figures 17 and 20, the top portion 43 extends with a length in the left-right direction that is approximately the same as the upper surface 21a of the support portion 21. A U-shaped groove 43a is provided in the center of the top portion 43. The U-shaped groove 43a has an opening at its right end and a groove bottom on its left side. The U-shaped groove 43a is provided with a width that allows the male screw 22a of the pressing member 22 to pass through. The tip 43b of the top portion 43 is divided by the U-shaped groove 43a, and two such tips are provided, one in the front and one in the back.

[0053] As shown in Figures 17 and 20, when the intervening member 41 is attached to the support portion 21, the pressing surface 42a of the bottom portion 42 abuts against the lower surface 21b of the support portion 21. The bent portion 42b protrudes to the right of the support portion 21 from the hollow passage C. The top portion 43 abuts against the upper surface 21a of the support portion 21. The connecting portion 44 extends vertically following the side surface 21c of the support portion 21. The bottom portion 42 and the top portion 43 clamp the support portion 21 in the vertical direction, thereby restricting the vertical movement of the intervening member 41 relative to the support portion 21.

[0054] As shown in Figure 20, the tip 45a of the engaging portion 45 faces the inner slope of a convex portion 21g that is provided on the lower surface 21b and protrudes downward. For example, when the pressing member 22 is loosened relative to the support portion 21, the lower end 22d of the pressing member 22 does not press against the pressing surface 42a of the bottom portion 42. Therefore, in order to prevent the intervening member 41 from coming off, it is necessary to engage one part of the intervening member 41 with one part of the support portion 21. By engaging the tip 45a of the engaging portion 45 with the inner slope of the convex portion 21g, the intervening member 41 is prevented from coming off the support portion 21.

[0055] As shown in Figure 20, the tip 46a of the protrusion 46 faces the lower end 22d of the pressing member 22. For example, when the pressing member 22 is tightened against the support 21, the lower end 22d of the pressing member 22 approaches the tip 46a of the protrusion 46. By facing the tip 46a of the protrusion 46 and the lower end 22d of the pressing member 22 and engaging them, the intervening member 41 is prevented from coming off the pressing member 22. The pressing member 22 is attached in such a way that it does not detach from the support 21. Therefore, the intervening member 41 is prevented from coming off the support 21 via the pressing member 22.

[0056] When attaching the intervening member 41 to the support part 21, the intervening member 41 moves approximately horizontally from left to right relative to the male screw 22a attached to the support part 21. The male screw 22a moves relative to the intervening member 41, moving from the opening at the right end of the U-shaped groove 43a to the bottom of the groove at the left end. This allows the intervening member 41 to be attached to the support part 21 without removing the pressing member 22 from the support part 21. Moreover, the engaging portion 45 and the protruding portion 46 extend upward from right to left. Therefore, when moving the intervening member 41 from left to right, the engaging portion 45 is less likely to catch on the convex portion 21g of the base 2, and the protruding portion 46 is less likely to catch on the lower end 22d of the pressing member 22. As a result, the intervening member 41 can be smoothly attached to the support part 21.

[0057] When removing the intervening member 41 from the support part 21, the intervening member 41 moves approximately horizontally from right to left relative to the male screw 22a. The male screw 22a moves relative to the intervening member 41, moving from the bottom of the groove at the left end of the U-shaped groove 43a to the opening at the right end. This allows the intervening member 41 to be removed from the support part 21 without removing the pressing member 22 from the support part 21. Moreover, the engaging portion 45 and the protruding portion 46 extend upward from right to left. Therefore, when attempting to move the intervening member 41 from left to right, the engaging portion 45 easily catches on the convex portion 21g of the base 2, and the protruding portion 46 easily catches on the lower end 22d of the pressing member 22. This prevents the intervening member 41 from unintentionally coming off the support part 21.

[0058] As described above, the engaging portion 45 of the intervening member 41 protrudes upward from the bottom portion 42, as shown in Figure 20. The support portion 21 of the base 2 has a protrusion 21g that protrudes downward and faces the engaging portion 45 of the intervening member 41, thereby preventing the intervening member 41 from coming off the base 2. Therefore, the engaging portion 45 can be provided without increasing the size of the intervening member 41. This helps to suppress an increase in material costs.

[0059] As shown in Figure 20, the intervening member 41 has a projection 46 that protrudes upward from the bottom 42. The projection 46 faces the lower end 22d of the pressing member 22, thereby restricting the intervening member 41 from coming off the base 2. Therefore, the projection 46 can be provided by processing the bottom 42 without increasing the size of the intervening member 41. This helps to suppress an increase in material costs.

[0060] As shown in Figure 20, the engaging portion 45 and the protruding portion 46 are shaped by cutting and raising a part of the bottom portion 42, and have an inclination angle that is positioned higher the closer they are to the connecting portion 44. Therefore, when moving the intervening member 41 in the mounting direction (opposite direction to the connecting portion 44), the engaging portion 45 is less likely to catch on the protrusion 21g of the base 2. Also, the protruding portion 46 is less likely to catch on the lower end 22d of the pressing member 22. As a result, the intervening member 41 can be smoothly attached to the support portion 21. On the other hand, when attempting to move the intervening member 41 in the removal direction (the direction in which the connecting portion 44 is provided), the engaging portion 45 is more likely to catch on the protrusion 21g of the base 2. Also, the protruding portion 46 is more likely to catch on the lower end 22d of the pressing member 22. As a result, it is possible to prevent the intervening member 41 from unintentionally coming off the support portion 21.

[0061] Various modifications can be made to the embodiment described above. Although a portable circular saw was used as an example of the portable processing machine 1, the auxiliary device fixing mechanism of this disclosure may also be provided to other portable cutting machines such as cutters or jigsaws, or to portable cutting machines such as routers. Although a parallel guide 10 was used as an example of the auxiliary device, the auxiliary device fixing mechanisms 20, 30, and 40 of this disclosure may also be provided to fix, for example, a sub-base, a long guide adapter, etc., to the base of the portable processing machine.

[0062] An example is shown in which a support portion 21 is provided on the front left side of the base 2 to insert and fix the parallel ruler 10 in the left-right direction into the front of the base 2. Alternatively, the support portion 21 may be provided on, for example, the front right side, rear left side, and rear right side of the base 2. An example is shown of auxiliary device fixing mechanisms 20, 30, and 40 for inserting and fixing the connecting bar 11 of the parallel ruler 10 to the base 2 in the left-right direction. Alternatively, for example, the auxiliary device may be inserted to the base 2 in the front-rear direction.

[0063] An example of an auxiliary device fixing mechanism 20, 30, 40 is provided in which the intervening members 23, 31, and 41 are attached to the support part 21 by moving the intervening members 23, 31, and 41 from left to right relative to the support part 21. An example of an auxiliary device fixing mechanism 20, 30, 40 is also provided in which the intervening members 23, 31, and 41 are removed from the support part 21 by moving the intervening members 23, 31, and 41 from right to left relative to the support part 21. The mounting and removal directions of the intervening members 23, 31, and 41 are not limited to these, and may be reversed left to right, for example. For example, the mounting and removal directions of the intervening members 23, 31, and 41 may be in the front-to-back direction or the up-and-down direction. An example of a configuration in which the pressing member 22 presses the upper surface 11a of the connecting bar 11 from above to below is provided. The direction in which the pressing member 22 presses the auxiliary device is not limited to this, and may also be in the left-right direction or the front-back direction, for example.

[0064] A single intervening member may include two or all of the engaging portions 28 of the first embodiment, 35 of the second embodiment, and 45 of the third embodiment. The arm portion 27 and engaging portion 28 of the first embodiment may be provided only in front of or behind the connecting portion 26. The engaging portion 35 of the second embodiment may be provided only at either the front tip 33b or the rear tip 33b of the top portion 33. [Explanation of symbols]

[0065] 1…Portable processing machine 2...Base, 2a...Window section, 2b...Side wall, 2c,2d...Auxiliary device receiving section, 2e...Engaging surface 3...machine body, 3a...handle 4… Electric motor 5...Knife 6…Fixed cover 7…Movable cover 10…Parallel ruler (auxiliary tool) 11...Connection bar, 11a...Top surface, 11b...Bottom surface, 11c...Curved part, 11d...Tip part 12... Ruler body, 12a... Guide surface 20…(For portable processing machines) Auxiliary device fixing mechanism (First embodiment) 21...Support part, 21a...Top surface, 21b...Bottom surface, 21c, 21d...Side surface, 21e...Through hole 21f...Nut holding recess, 21g...Protrusion, 21h...Slope, 21i...Front, 21j...Rear 22...Pressing member, 22a...Male screw, 22b...Knob operating part, 22c...Nut 22d…lower end 23...Intervening member, 23a...Upper notch, 23b...Lower notch 24...Bottom, 24a...Pressing surface, 24b...Bending part 25...top, 25a...tip 26...Connection part, 26a...Side edge 27...Arm part, 27a...Base part, 27b...Lower part 28...Engaging part 30…(For portable processing machines) Auxiliary device fixing mechanism (Second embodiment) 31...Intervening member 32...Bottom, 32a...Pressing surface, 32b...Bending part 33...Top part, 33a...U-shaped ditch, 33b...Tip 34...Connection part 35...Engaging part 40…(For portable processing machines) Auxiliary device fixing mechanism (Third embodiment) 41...Intervening member 42...Bottom, 42a...Pressing surface, 42b...Bending section, 42c,42d...Cut-out holes 43...Top part, 43a...U-shaped ditch, 43b...Tip 44...Connection part 45...Engagement part, 45a...Tip 46...protrusion, 46a...tip 50…(For portable processing machines) Auxiliary device fixing mechanism (conventional example) 51...Intervening member 52...Bottom, 52a...Pressing surface, 52b...Bending part 53...Top part, 53a...Through hole, 53b...Tip 54...Connection part W…Work material C…Hollow road

Claims

1. A portable processing machine auxiliary equipment fixing mechanism for fixing auxiliary equipment to the base of a portable processing machine, A pressing member attached to the base and pressing the auxiliary device against the base, The pressing member and the auxiliary device have an intervening member, The intervening member has an engaging portion that releasably engages with the base, and by disengaging the engaging portion from the base, the intervening member can be removed from the base without removing the pressing member from the base. The base has a support portion to which the pressing member is attached, The intervening member is a portable auxiliary device fixing mechanism for a processing machine, having a top portion that abuts against the upper surface of the support portion, a bottom portion that abuts against the lower surface of the support portion and is pressed downward by the pressing member, and a connecting portion that connects the top portion and the bottom portion so that the support portion is clamped between the top portion and the bottom portion.

2. A portable auxiliary device fixing mechanism for a processing machine according to claim 1, The base is a portable processing machine auxiliary tool fixing mechanism having an auxiliary tool receiving portion that allows the auxiliary tool to be inserted horizontally below the support portion.

3. A portable auxiliary device fixing mechanism for a processing machine according to claim 1 or 2, The base has a support portion to which the pressing member is attached, and a side wall that protrudes upward from the support portion at a location closer to the side edge of the base. The intervening member is attached to the support portion from the side edge, The engaging portion of the intervening member is a fixing mechanism for an auxiliary device for a portable processing machine, which prevents it from coming off the support portion by facing the side wall.

4. A portable auxiliary device fixing mechanism for a processing machine according to claim 3, The intervening member has an arm portion extending from the lateral edge of the connecting portion, The engaging portion of the intervening member is a fixing mechanism for an auxiliary device for a portable processing machine, provided at the lower part of the arm.

5. A portable auxiliary device fixing mechanism for a processing machine according to claim 4, The arm portion extends from the horizontal edge of the connecting portion toward the side wall of the base, The engagement portion is a fixing mechanism for an auxiliary tool for a portable processing machine, which protrudes from the lower part of the arm toward the side wall.

6. A portable auxiliary device fixing mechanism for a processing machine according to claim 5, A lower notch is provided between the arm portion and the base portion. A fixing mechanism for an auxiliary device for a portable processing machine, wherein an upper notch is provided between the arm portion and the top portion.

7. A portable auxiliary device fixing mechanism for a processing machine according to Claim 1, The engaging portion of the intervening member is a portable auxiliary tool fixing mechanism for a processing machine that protrudes downward from the tip of the top portion and faces the side surface of the support portion.

8. A portable auxiliary device fixing mechanism for a processing machine according to Claim 1, The engaging portion of the intervening member protrudes upward from the bottom, The support portion of the base has a protrusion that protrudes downward and faces the engagement portion of the intervening member, thereby preventing the intervening member from coming off the base, in a portable auxiliary device fixing mechanism.

9. A portable auxiliary device fixing mechanism for a processing machine according to claim 8, The intervening member has a projection that protrudes upward from the bottom, and the projection faces the lower end of the pressing member, thereby preventing the intervening member from coming off the base, in a portable processing machine auxiliary device fixing mechanism.

10. A portable auxiliary device fixing mechanism for a processing machine according to claim 9, The aforementioned engaging portion and / or the aforementioned protruding portion has a shape formed by cutting and raising a part of the bottom portion, and has an inclination angle that is positioned higher the closer it is to the connecting portion, thus forming an auxiliary tool fixing mechanism for a portable processing machine.

Images