Stand for portable band saw

Abstract

To reduce the burden on users of portable band saws. [Solution] The stand for a portable band saw, to which a portable band saw is attached, comprises a base, a mounting arm supported on the base so as to be able to swing around a pivot point and to which the portable band saw is attached, and a return device that automatically returns the mounting arm to its top dead center.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a stand for a portable band saw.

Background Art

[0002] In the technical field related to portable band saws, a stand to which a portable band saw can be attached, as disclosed in Patent Document 1, is known. The portable band saw is swingably attached to the stand so as to move between the top dead center and the bottom dead center.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When moving the portable band saw to the top dead center, if the user of the portable band saw needs to lift the portable band saw by themselves, the burden on the user increases. When the burden on the user is large, the work efficiency may decrease and the working time may be prolonged.

[0005] The technology disclosed in this specification aims to reduce the burden on the user of the portable band saw.

Means for Solving the Problems

[0006] This specification discloses a stand for a portable band saw to which a portable band saw can be attached. The stand for a portable band saw may include a base, a mounting arm that is swingably supported on the base about a swing fulcrum and to which the portable band saw is attached, and a return device that automatically returns the mounting arm to the top dead center.

Effects of the Invention

[0007] The technology disclosed herein reduces the burden on users of portable band saws. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view from the upper left front of the band saw according to the embodiment. [Figure 2] Figure 2 is a view of the band saw according to the embodiment, seen from the right side. [Figure 3] Figure 3 is an exploded view of the band saw according to the embodiment, seen from the right side. [Figure 4] Figure 4 is a perspective view from the upper left rear showing a band saw according to the embodiment. [Figure 5] Figure 5 is a perspective view from the upper right front of the stand to which the band saw according to the embodiment is attached. [Figure 6] Figure 6 is a perspective view from the upper left rear showing a stand to which a band saw according to the embodiment is attached. [Figure 7] Figure 7 is a perspective view from the lower left rear showing the stand to which the band saw according to the embodiment is attached. [Figure 8] Figure 8 is a view from the left side of the stand to which the band saw according to the embodiment is attached. [Figure 9] Figure 9 is a view from the right side of the stand to which the band saw according to the embodiment is attached. [Figure 10] Figure 10 is a view from the front of a stand to which a band saw according to the embodiment is attached. [Figure 11] Figure 11 is a rear view of the stand to which the band saw according to the embodiment is attached. [Figure 12] Figure 12 is a view from above of a stand to which a band saw according to the embodiment is attached. [Figure 13] Figure 13 is a view from the left side of the stand to which the band saw according to the embodiment is attached. [Figure 14]FIG. 14 is a view of the stand with the portable band saw according to the embodiment as seen from the right side. [Figure 15] FIG. 15 is a view of the stand with the portable band saw according to the embodiment as seen from the front side. [Figure 16] FIG. 16 is a view of the stand with the portable band saw according to the embodiment as seen from the rear side. [Figure 17] FIG. 17 is a view of the stand with the portable band saw according to the embodiment as seen from the upper side. [Figure 18] FIG. 18 is a cross-sectional view showing a part of the stand according to the embodiment. [Figure 19] FIG. 19 is a cross-sectional view showing a part of the stand according to the embodiment. [Figure 20] FIG. 20 is a cross-sectional view showing a part of the stand according to the embodiment. [Figure 21] FIG. 21 is a perspective view of the stand according to the embodiment as seen from the upper right front side. [Figure 22] FIG. 22 is a perspective view of the stand according to the embodiment as seen from the upper left rear side. [Figure 23] FIG. 23 is an exploded perspective view of the stand according to the embodiment as seen from the upper left rear side.

MODE FOR CARRYING OUT THE INVENTION

[0009] In one or more embodiments, the stand for a portable band saw to which the portable band saw is attached may include a base, a mounting arm that is supported on the base so as to be swingable about a swing fulcrum and to which the portable band saw is attached, and a return device that automatically returns the mounting arm to the top dead center.

[0010] In the above configuration, when moving the portable band saw to the top dead center, the user of the portable band saw does not need to lift the band saw themselves. Therefore, the burden on the user is reduced. Also, because the user does not need to lift the portable band saw themselves, they can quickly move on to other tasks. As a result, the decrease in work efficiency is suppressed, and the length of work time is suppressed.

[0011] In one or more embodiments, the return device may include a spring interposed between the base and the mounting arm. The biasing force of the spring may hold the mounting arm in the top dead center position.

[0012] In the above configuration, the biasing force of the spring automatically returns the mounting arm to the top dead center, and the position of the mounting arm is rationally maintained at the top dead center. For example, the position of the portable band saw is maintained at the top dead center without the use of a locking mechanism. Examples of springs include torsion springs, coil springs, and leaf springs.

[0013] In one or more embodiments, the spring may include a torsion spring. The pivot shaft of the mounting arm may be inserted into the coil portion of the torsion spring. One arm portion of the torsion spring may press against the base, and the other arm portion of the torsion spring may press the mounting arm to its top dead center.

[0014] The above configuration improves the ease of assembly when manufacturing a stand for a portable band saw. It also improves the ease of work when attaching a portable band saw to the stand.

[0015] In one or more embodiments, the portable band saw may have a motor-driven wheel, a driven wheel, and a blade that is mounted on the driven wheel and the driven wheel. The driven wheel may be positioned on the non-user side of the driven wheel, and the pivot point may be positioned on the non-user side of the driven wheel.

[0016] In the above configuration, the drive wheel is positioned on the user's side both when the stand is attached and when it is in normal use. The user can perform the work using the same operation in both cases. When the stand is attached, it refers to the state in which the portable band saw is used while attached to the portable band saw stand. When it is in normal use, it refers to the state in which the portable band saw is used while detached from the portable band saw stand.

[0017] In one or more embodiments, the portable band saw may have a housing that accommodates a drive wheel and a driven wheel, and a handle fixed to the housing. In the left-right direction parallel to the axis of the pivot point, the position of the cutting portion of the blade relative to the handle when the portable band saw is mounted on a stand may be the same as the position of the cutting portion of the blade relative to the handle when the portable band saw is in normal use.

[0018] In the above configuration, the user can perform the same operations when the stand is attached and when it is in normal use.

[0019] In one or more embodiments, the cutting portion of the blade may be positioned to the left of the handle, both when mounted on a stand and during normal use.

[0020] In the above configuration, when the user grips the handle with their right hand, the user can more easily see the cutting edge of the blade, thus suppressing a decrease in work efficiency.

[0021] In one or more embodiments, the mounting arm may have a cylindrical portion positioned around a pivot point, a first arm portion extending from the cylindrical portion toward the user, and a second arm portion extending upward from the cylindrical portion. The stand for the portable band saw may include a first fastener for fixing the first arm portion to the portable band saw, and a second fastener for fixing the second arm portion to the portable band saw.

[0022] In the above configuration, the portable band saw is securely fixed to the portable band saw stand by the first and second fasteners, which are spaced apart from each other.

[0023] In one or more embodiments, at least one of the first fastener and the second fastener may be a thumb screw.

[0024] In the above configuration, the user can attach and detach the portable band saw to the portable band saw stand without using any tools. A thumb screw is a screw that can be tightened with the fingers. Both the first and second fasteners may be thumb screws. Alternatively, one of the first and second fasteners may be a thumb screw, and the other may be a regular screw that is tightened with a tool.

[0025] In one or more embodiments, the stand for the portable band saw may include a vise mounted on a base for securing the workpiece, and a fence mounted on the base for supporting the workpiece. The contact surface of the fence facing the workpiece may face the side away from the user, and the vise may be positioned further away from the user than the contact surface.

[0026] In the above configuration, when the workpiece moves towards the user due to the force transmitted by the blade during cutting, the contact surface of the fence faces away from the user, so the fence can suitably support the workpiece. Since the vise is positioned away from the user than the contact surface of the fence, the vise can suitably fix the workpiece positioned on the fence.

[0027] In one or more embodiments, a stand for a portable band saw to which a portable band saw is attached may include a base and a mounting arm that is pivotably supported on the base about a pivot point and to which the portable band saw is attached. The portable band saw may include a motor-driven wheel, a driven wheel, a blade that is placed on the driven wheel and the driven wheel, a housing that accommodates the driven wheel and the driven wheel, and a battery mounting section to which a battery pack is attached. The driven wheel may be positioned on the non-user side of the driven wheel, and the pivot point may be positioned on the non-user side of the driven wheel. The battery pack attached to the battery mounting section may be positioned on the user side of the position halfway between the pivot point and the user-side end of the housing.

[0028] In the above configuration, when moving the portable band saw to its bottom dead center, the mass of the battery pack makes it easier for the band saw to move to the bottom dead center. Therefore, the burden on the user is reduced. In addition, the user can smoothly attach and detach the battery pack to the battery mounting section.

[0029] In one or more embodiments, the portable band saw may have a handle fixed to the housing. The battery mounting section may be provided at the user-side end of the handle.

[0030] In the above configuration, the battery pack, which is a heavy object, is positioned at the user-side end of the handle, which improves the feel of operation when the user moves the portable band saw to the bottom dead center.

[0031] In one or more embodiments, a portable band saw stand to which a portable band saw is attached may include a base; a mounting arm having a cylindrical portion pivotably supported on the base around a pivot point and positioned around the pivot point; a first arm portion extending from the cylindrical portion toward the user; and a second arm portion extending upward from the cylindrical portion; a first fastener for fixing the first arm portion to the portable band saw; and a second fastener for fixing the second arm portion to the portable band saw.

[0032] In the above configuration, the portable band saw is securely fixed to the portable band saw stand by the first and second fasteners, which are spaced apart from each other.

[0033] In one or more embodiments, the stand for the portable band saw may include a support member fixed to a base, and a locking member movably supported by the support member and inserted into at least a portion of the first arm to secure the mounting arm.

[0034] In the above configuration, the position of the mounting arm is fixed by the locking member. In addition, the size of the locking mechanism, including the support member and the locking member, is kept from increasing.

[0035] In one or more embodiments, the first arm portion may have a bottom dead center insertion hole. The mounting arm may be fixed at the bottom dead center by inserting a locking member into the bottom dead center insertion hole.

[0036] In the above configuration, the mounting arm is fixed at the bottom dead center by the locking member. Furthermore, the size of the locking mechanism, including the support member and locking member, is kept from increasing.

[0037] In one or more embodiments, the first arm portion may have an insertion hole for bottom dead center and an insertion hole for top dead center. The mounting arm may be fixed at bottom dead center by inserting a locking member into the insertion hole for bottom dead center. The mounting arm may be fixed at top dead center by inserting a locking member into the insertion hole for top dead center.

[0038] In the above configuration, the mounting arm is fixed in place at both the bottom dead center and the top dead center by the locking member. By fixing the mounting arm at the top dead center, the user can, for example, replace the blade while the portable band saw is mounted on the stand. Fixing the mounting arm at the top dead center prevents the portable band saw from unintentionally moving downwards during blade replacement. Furthermore, it prevents the locking mechanism, including the support member and locking member, from becoming excessively large.

[0039] In one or more embodiments, the first arm portion may have a storage portion for housing at least a part of the first fastener.

[0040] In the above configuration, the dead space in the first arm section is effectively utilized.

[0041] In one or more embodiments, the outer shape of the base is rectangular in plan view.

[0042] The above configuration prevents the portable band saw stand from becoming excessively large. Users can store the portable band saw stand in, for example, a small space.

[0043] In one or more embodiments, the base may be made of drawn steel sheet. The mounting arm may be made of die-cast alloy.

[0044] The above configuration achieves both lightness and high strength in the stand for the portable band saw.

[0045] The embodiments of this disclosure will be described below with reference to the drawings. In the embodiments, the positional relationships of each part will be described using the terms "front," "rear," "left," "right," "up," and "down." These terms indicate relative positions or directions with reference to the center of the stand 30 (stand for portable band saw). In the embodiments, a virtual axis parallel to the front-rear direction will be appropriately referred to as the front-rear axis, a virtual axis parallel to the left-right direction will be appropriately referred to as the left-right axis, and a virtual axis parallel to the up-down direction will be appropriately referred to as the up-down axis.

[0046] As will be described later, when using the band saw 1 (portable band saw) attached to the stand 30, the user of the band saw 1 works while positioned in front of the stand 30. In this embodiment, the front side is the user side where the user is positioned. The rear side is the opposite side of the front side, the side away from the user.

[0047] [Band saw] Figure 1 is a perspective view from the upper left front of the band saw 1 according to the embodiment. Figure 2 is a view of the band saw 1 according to the embodiment from the right side. Figure 3 is an exploded view of the band saw 1 according to the embodiment from the right side. The arrows indicating "front," "rear," "left," "right," "up," and "down" in Figures 1, 2, and 3 indicate directions assuming that the band saw 1 is mounted on the mounting arm 34 (described later) and positioned at the bottom dead center of the mounting arm 34.

[0048] The band saw 1 is a type of power tool powered by an electric motor. The band saw 1 is a power tool that cuts a workpiece W by rotating a strip-shaped blade 2. In this embodiment, the band saw 1 is a portable band saw. The user of the band saw 1 can carry the band saw 1 around. The user of the band saw 1 can cut the workpiece W while holding the band saw 1 in their hand.

[0049] The band saw 1 comprises a housing 3, a handle 4, and a plate 5.

[0050] Housing 3 is elongated in the front-to-back direction. Housing 3 includes a base housing 6 and a cover housing 7. The base housing 6 is positioned above the cover housing 7. The base housing 6 and the cover housing 7 are positioned to overlap each other. The base housing 6 is made of metal. Examples of the metal forming the base housing 6 include aluminum or magnesium. The cover housing 7 is made of synthetic resin. Examples of the synthetic resin forming the cover housing 7 include polycarbonate resin or polyamide resin.

[0051] The band saw 1 is attached to the mounting arm 34, which will be described later. With the mounting arm 34 in the bottom dead center position, the upper surface of the base housing 6 is inclined upward toward the right. The upper right part of the base housing 6 and the upper right part of the cover housing 7 are connected via a hinge 8. The pivot axis of the hinge 8 extends in the front-rear direction. A storage space is formed between the base housing 6 and the cover housing 7.

[0052] An opening 9 is provided in the center of the housing 3 in the front-to-back direction. The opening 9 is formed to be recessed from the lower left end of the housing 3 toward the upper right.

[0053] The handle 4 is held by the user of the band saw 1. The handle 4 is fixed to the housing 3. The handle 4 is fixed to the top of the base housing 6 by a number of screws 10. The handle 4 includes a first part 4A fixed to a portion of the base housing 6 rearward of the opening 9, a second part 4B fixed to a portion of the base housing 6 in front of the opening 9, and a third part 4C connecting the first part 4A and the second part 4B. The first part 4A and the second part 4B are provided to extend upward from the base housing 6. The third part 4C is provided to connect the upper end of the first part 4A and the upper end of the second part 4B.

[0054] Plate 5 is fixed to housing 3. Plate 5 is fixed to the top of base housing 6 by multiple screws 11. Plate 5 is positioned behind handle 4. Plate 5 is elongated in the front-to-back direction. The front end of plate 5 is fixed to base housing 6 by two screws 11. The rear end of plate 5 is positioned behind the rear end of housing 3. Plate 5 is made of metal. Iron is an example of the metal forming plate 5.

[0055] The band saw 1 comprises a motor 13, a battery mounting section 14, a drive wheel 15, a driven wheel 16, a blade 2, a tension adjustment lever 17, a rear guide roller 18, a front guide roller 19, a stopper plate 20, a main switch 21, a speed control dial 22, and a light 42.

[0056] Motor 13 is the power source for the band saw 1. Motor 13 is an electric motor. Motor 13 is housed in a motor case 23. The motor case 23 is fixed to a portion of the base housing 6 in front of the opening 9. The motor case 23 is provided so as to protrude to the upper left from the top surface of the base housing 6. Motor 13 is an inner rotor type brushless motor.

[0057] The battery mounting section 14 is connected to the battery pack 24. The battery pack 24 is mounted in the battery mounting section 14. The battery mounting section 14 is located at the front end (user-side end) of the handle 4. The battery mounting section 14 is located at the front of the second portion 4B of the handle 4. The battery pack 24 is the power source for the band saw 1. The battery pack 24 includes a rechargeable battery. The battery pack 24 supplies direct current to the band saw 1. The motor 13 is driven by the power supplied from the battery pack 24.

[0058] The battery pack 24 is fixed to the battery mounting section 14 by a locking mechanism (not shown) while mounted in the battery mounting section 14. The battery pack 24 is movable vertically relative to the battery mounting section 14. The battery mounting section 14 has a guide mechanism that guides the battery pack 24 vertically. The battery pack 24 has a release button 24A that releases the locking mechanism. When the release button 24A is operated, the locking mechanism releases the battery pack 24. When the battery pack 24 is mounted in the battery mounting section 14, the release button 24A is located on the top of the battery pack 24. After the release button 24A is operated while the battery pack 24 is mounted in the battery mounting section 14, the battery pack 24 is moved upward, thereby removing the battery pack 24 from the battery mounting section 14. The battery pack 24 is moved downward relative to the battery mounting section 14, thereby mounting the battery pack 24 in the battery mounting section 14.

[0059] Each of the drive wheel 15 and the driven wheel 16 is housed in the housing 3. The drive wheel 15 is rotated by the motor 13. The drive wheel 15 is positioned in front of the opening 9. The driven wheel 16 is positioned behind the opening 9. The driven wheel 16 is positioned behind (on the opposite side of the user) the drive wheel 15.

[0060] As shown in Figure 1, the housing 3 includes a front housing section 3A, a rear housing section 3B, and a bridge section 3C. The front housing section 3A is positioned in front of the rear housing section 3B. In the front-rear direction, the bridge section 3C is positioned between the front housing section 3A and the rear housing section 3B. The front housing section 3A is formed by the front part of the base housing 6 and the front part of the cover housing 7. The rear housing section 3B is formed by the rear part of the base housing 6 and the rear part of the cover housing 7. The bridge section 3C is formed by the central part of the base housing 6 and the central part of the cover housing 7. The drive wheel 15 is housed in the front housing section 3A. The driven wheel 16 is housed in the rear housing section 3B. The bridge section 3C is positioned to connect the upper part of the front housing section 3A and the upper part of the rear housing section 3B. The opening 9 is provided between the rear of the front housing section 3A, the front of the rear housing section 3B, and the lower part of the bridge section 3C. The opening 9 is located below the bridge section 3C.

[0061] A portion of the drive wheel 15 is exposed through an opening 7A provided in the cover housing 7. A portion of the driven wheel 16 is exposed through an opening 7B provided in the cover housing 7. Each of the drive wheel 15 and the driven wheel 16 is rotatably supported by the base housing 6. The drive wheel 15 rotates around a first rotation axis CX1. The driven wheel 16 rotates around a second rotation axis CX2. The first rotation axis CX1 and the second rotation axis CX2 are parallel. Each of the first rotation axis CX1 and the second rotation axis CX2 is inclined upward toward the left.

[0062] The blade 2 is mounted on the drive wheel 15 and the driven wheel 16. The blade 2 is annular. The blade 2 is pulled in the front-rear direction by the drive wheel 15 and the driven wheel 16. At least a portion of the blade 2 is positioned in the opening 9. The workpiece W is cut by the blade 2 positioned in the opening 9. The blade 2 twists near the boundary of the opening 9. In the opening 9, the left and right faces of the blade 2 are perpendicular to the left-right axis.

[0063] The drive wheel 15 is connected to the rotor shaft of the motor 13. The drive wheel 15 rotates due to the rotational force generated by the motor 13. When the drive wheel 15 rotates around the first rotation axis CX1 by the motor 13, the blade 2 rotates while being supported by the drive wheel 15 and the driven wheel 16, respectively. The driven wheel 16, with the blade 2 attached, rotates around the second rotation axis CX2, following the rotation of the drive wheel 15.

[0064] The tension adjustment lever 17 is operated to adjust the tension of the blade 2. The tension adjustment lever 17 is connected to the driven wheel 16. When the tension adjustment lever 17 is operated, the driven wheel 16 moves in the forward and backward direction. The tension of the blade 2 is adjusted by the forward and backward movement of the driven wheel 16.

[0065] The rear guide rollers 18 guide the blade 2. The rear guide rollers 18 are rotatably supported on the base housing 6 so as to face the opening 9. The rear guide rollers 18 are positioned behind the opening 9. A pair of rear guide rollers 18 are provided so as to sandwich the blade 2 from the left and right directions. The axis of rotation of the rear guide rollers 18 is parallel to the vertical axis.

[0066] The front guide rollers 19 guide the blade 2. The front guide rollers 19 are rotatably supported on the base housing 6 so as to face the opening 9. The front guide rollers 19 are positioned in front of the opening 9. A pair of front guide rollers 19 are provided so as to sandwich the blade 2 from the left and right directions. The axis of rotation of the front guide rollers 19 is parallel to the vertical axis.

[0067] Blade 2 moves from the rear guide roller 18 toward the front guide roller 19 in the opening 9. Blade 2 moves forward (towards the user) in the opening 9. The drive wheel 15 rotates so that blade 2 moves forward in the opening 9.

[0068] During normal use, the stopper plate 20 supports the workpiece W. Normal use refers to the state in which the band saw 1 is used when it is detached from the stand 30. Normal use also refers to the state in which the user holds the band saw 1 by hand while cutting the workpiece W. During normal use, the user positions themselves in front of the band saw 1 and performs the work while gripping the handle 4 with their right hand. During normal use, the stopper plate 20 supports the workpiece W from the front.

[0069] The stopper plate 20 is supported by the base housing 6. The stopper plate 20 is positioned at the front of the opening 9 so as to face the opening 9. The blade 2 rotates in the opening 9 so as to move from the rear guide roller 18 to the front guide roller 19. Under normal use, the stopper plate 20 supports the workpiece W from the front. The stopper plate 20 prevents the workpiece W from moving due to the rotation of the blade 2. As shown in Figure 4, the stopper plate 20 has a vertically elongated slit 20A. The blade 2 passes through the slit 20A.

[0070] The stopper plate 20 is fixed to the base housing 6 by a fixing lever 25. The fixing lever 25 is connected to the left side of the base housing 6 via a rotating member 25A. The fixing lever 25 and the rotating member 25A are fixed together by a screw 25B. The rotating member 25A is inserted into a slit 20B provided in the stopper plate 20. The slit 20B is long in the vertical direction. When the fixing lever 25 is rotated in one direction, the stopper plate 20 is clamped between the fixing lever 25 and the base housing 6, and the stopper plate 20 is fixed to the base housing 6. When the fixing lever 25 is rotated in the other direction, the fixing of the stopper plate 20 is released.

[0071] The stopper plate 20 is adjustable in the vertical position relative to the base housing 6. As shown in Figure 4, a stopper pin 25C is fixed to the base housing 6. The stopper pin 25C is a set screw. At least a portion of the stopper pin 25C is positioned in the slit 20B. The stopper plate 20 is movable vertically while the slit 20B is guided by the rotating member 25A and the stopper pin 25C. After the stopper plate 20 has been moved vertically with the stopper plate 20 released, the fixing lever 25 is rotated in one direction, thereby fixing the stopper plate 20 in any vertical position.

[0072] The main switch 21 is operated to drive or stop the motor 13. The main switch 21 is located on the handle 4. In this embodiment, the main switch 21 is provided so as to protrude downward from the lower rear of the third portion 4C. The motor 13 is driven by pulling the main switch 21 upward.

[0073] A lock-off operating member 26 and a lock-on operating member 27 are positioned near the main switch 21. The lock-off operating member 26 is operated to change the operation of the main switch 21 from a blocked state to an allowed state. The lock-off operating member 26 is positioned on the upper part of the first section 4A. If the lock-off operating member 26 is not operated, the operation of the main switch 21 is blocked. By pushing the lock-off operating member 26, the operation of the main switch 21 changes from a blocked state to an allowed state. The user can pull the main switch 21 by pushing the lock-off operating member 26.

[0074] The lock-on operating member 27 is operated to maintain the pulled state of the main switch 21. The lock-on operating member 27 is located at the rear of the third section 4C. After the main switch 21 is pulled, the lock-on operating member 27 is pushed to maintain the pulled state of the main switch 21. After the main switch 21 is pulled, the lock-on operating member 27 is pushed to allow the motor 13 to continue driving even if the pulled state of the main switch 21 is released.

[0075] The speed control dial 22 is operated to adjust the rotational speed of the motor 13. The speed control dial 22 is located on the top of the handle 4.

[0076] Light 42 illuminates the workpiece W and the blade 2. Light 42 is positioned on the left side of the base housing 6, behind the center in the front-to-back direction. Light 42 is composed of LEDs.

[0077] Figure 4 is a perspective view from the upper left rear of the band saw 1 according to the embodiment. As shown in Figure 4, a hook 28 can be attached to the plate 5. The hook 28 is supported by a hook support member 29. The hook support member 29 rotatably supports the hook 28. The hook support member 29 is fixed to the plate 5 by a screw 11. The screw 11 fastens the hook support member 29 and the plate 5 together to the base housing 6. The plate 5 is fastened together with the hook support member 29.

[0078] [stand] Figure 5 is a perspective view from the upper right front of the stand 30 to which the band saw 1 according to the embodiment is mounted. Figure 6 is a perspective view from the upper left rear of the stand 30 to which the band saw 1 according to the embodiment is mounted. Figure 7 is a perspective view from the lower left rear of the stand 30 to which the band saw 1 according to the embodiment is mounted. Figure 8 is a view of the stand 30 to which the band saw 1 according to the embodiment is mounted from the left side. Figure 9 is a view of the stand 30 to which the band saw 1 according to the embodiment is mounted from the right side. Figure 10 is a view of the stand 30 to which the band saw 1 according to the embodiment is mounted from the front side. Figure 11 is a view of the stand 30 to which the band saw 1 according to the embodiment is mounted from the rear side. Figure 12 is a view of the stand 30 to which the band saw 1 according to the embodiment is mounted from above side. Figure 13 is a view of the stand 30 to which the band saw 1 according to the embodiment is mounted from the left side. Figure 14 is a view of the stand 30 to which the band saw 1 according to the embodiment is mounted from the right side. Figure 15 is a view of the stand 30 to which the band saw 1 according to the embodiment is mounted from the front side. Figure 16 is a view of the stand 30 to which the band saw 1 according to the embodiment is attached, seen from the rear. Figure 17 is a view of the stand 30 to which the band saw 1 according to the embodiment is attached, seen from above. Figure 18 is a cross-sectional view showing a part of the stand 30 according to the embodiment, corresponding to the view taken along line AA in Figure 8. Figure 19 is a cross-sectional view showing a part of the stand 30 according to the embodiment, corresponding to the view taken along line AA-AA in Figure 8. Figure 20 is a cross-sectional view showing a part of the stand 30 according to the embodiment, corresponding to the view taken along line AAA-AAA in Figure 13. Figure 21 is a perspective view of the stand 30 according to the embodiment, seen from the upper right front. Figure 22 is a perspective view of the stand 30 according to the embodiment, seen from the upper left rear. Figure 23 is an exploded perspective view of the stand 30 according to the embodiment, seen from the upper left rear.

[0079] Figures 5, 6, 7, 8, 9, 10, 11, and 12 each show the mounting arm 34 to which the band saw 1 is attached in the top dead center position. Figures 13, 14, 15, 16, and 17 each show the mounting arm 34 to which the band saw 1 is attached in the bottom dead center position. Figures 21, 22, and 23 each show the mounting arm 34 in the top dead center position.

[0080] Stand 30 is a stand for a portable band saw, on which a portable band saw 1 is attached. Stand 30 supports the band saw 1. The band saw 1 is detachable from stand 30. By being attached to stand 30, the band saw 1 is used as a stationary band saw, a type of stationary cutting machine. The band saw 1 is supported by stand 30 so as to be able to swing up and down. With the band saw 1 attached to stand 30, a pivot point AX is defined at the rear of the band saw 1. The front of the band saw 1 swings up and down.

[0081] When the stand is attached, the user of the band saw 1 positions themselves in front of the stand 30 and performs the work. When the stand is attached, the user positions themselves in front of the stand 30 to which the band saw 1 is attached and performs the work while gripping the handle 4 with their right hand.

[0082] In this embodiment, following the convention for stand 30, the side closer to the user is considered the front, and the side further away is considered the rear. That is, the front of stand 30 is the user's side, and the rear of stand 30 is the opposite side. From the user's perspective, the left side is the user's left hand side, and the right side is the user's right hand side.

[0083] The stand 30 comprises a base 31, a vise 32, a fence 33, a mounting arm 34, a first fastener 35, a second fastener 36, a support member 37, a locking member 38, and a return device 40.

[0084] The base 31 supports the vise 32, the fence 33, the mounting arm 34, and the return device 40, respectively. The base 31 supports the workpiece W. The workpiece W is placed on the upper surface of the base 31. In a plan view of the base 31 from above, the outer shape of the base 31 is rectangular. The outer shape of the base 31 is substantially a rectangular parallelepiped. The vertical dimension of the base 31 is smaller than the front-to-back and left-to-right dimensions of the base 31.

[0085] The base 31 is made of metal. The base 31 may be made of steel or aluminum. The base 31 may be made by drawing or casting. In this embodiment, the base 31 is made of drawn steel sheet formed by drawing a steel sheet. The base 31 has an upper plate portion 31A and a side plate portion 31B that protrudes downward from the periphery of the upper plate portion 31A. The outer shape of the upper plate portion 31A is rectangular. The side plate portion 31B is rectangular and annular. As shown in Figure 7, a recess 31C is provided on the inside of the side plate portion 31B. A spare blade 2 is stored in the recess 31C. The recess 31C functions as a storage portion (storage space) for accommodating the spare blade 2.

[0086] The base 31 has a plurality of hook portions 31D that protrude from the side plate portion 31B toward the center of the recess 31C. The hook portions 31D are formed by bending a notched portion of the side plate portion 31B toward the center (inward) of the recess 31C. One hook portion 31D is provided on each of the four sides of the side plate portion 31B. The spare blade 2 is stored in the recess 31C and hung on the hook portions 31D.

[0087] The vise 32 is provided on the upper surface of the base 31. The vise 32 fixes the workpiece W. The vise 32 clamps the workpiece W from above and below. As shown in Figures 21 and 22, the vise 32 has a support table 32A, a vise plate 32B, a screw 32C, a knob 32D, a screw support member 32E, a guide rod 32F, a rod support member 32G, a first thumb screw 32H, and a second thumb screw 32J.

[0088] The support table 32A is fixed to the upper surface of the base 31. The external shape of the support table 32A is substantially that of a rectangular parallelepiped. The support table 32A supports the workpiece W from below. The workpiece W is placed on the upper surface of the support table 32A. The support table 32A includes an aluminum block portion 32A1 fixed to the upper surface of the base 31 and a steel plate portion 32A2 fixed to the upper surface of the block portion 32A1. The workpiece W is in contact with the upper surface of the plate portion 32A2. Since the block portion 32A1 is made of aluminum, the weight of the support table 32A is reduced. Since the plate portion 32A2 in contact with the workpiece W is made of steel, wear of the support table 32A is suppressed.

[0089] A groove 32K is provided to the right of the center of the support table 32A in the left-right direction. The groove 32K is elongated in the front-rear direction. When the band saw 1 is positioned at its bottom dead center, the blade 2 is inserted into the groove 32K.

[0090] The vice plate 32B faces the support table 32A. The vice plate 32B is positioned above the support table 32A. The vice plate 32B is movable in the vertical direction. A screw 32C is fixed to the upper part of the vice plate 32B. The central axis of the screw 32C is parallel to the vertical axis. A knob 32D is fixed to the upper end of the screw 32C. A screw support member 32E rotatably supports the screw 32C. As the screw 32C rotates, the vice plate 32B moves in the vertical direction. A guide rod 32F guides the screw support member 32E in the vertical direction. The central axis of the guide rod 32F is parallel to the vertical axis. The screw support member 32E is movable in the vertical direction relative to the guide rod 32F. A rod support member 32G rotatably supports the lower end of the guide rod 32F. In this embodiment, the rod support member 32G is integrated with the block portion 32A1 of the support table 32A. The rod support member 32G and the block portion 32A1 are a single component. The guide rod 32F is supported by the rod support member 32G so as to be rotatable about the central axis of the guide rod 32F. The first thumb screw 32H fixes the screw support member 32E and the guide rod 32F when rotated in one direction. The first thumb screw 32H releases the screw support member 32E and the guide rod 32F when rotated in the other direction. The second thumb screw 32J fixes the guide rod 32F and the rod support member 32G when rotated in one direction. The second thumb screw 32J releases the guide rod 32F and the rod support member 32G when rotated in the other direction.

[0091] When fixing a workpiece W with the vise 32, the screw 32C is rotated so that the vise plate 32B moves downward after the workpiece W is placed on the upper surface of the support table 32A. The user can move the vise plate 32B downward by pinching and rotating the knob 32D with their fingers. With the workpiece W positioned between 32A and the vise plate 32B, the vise plate 32B moves downward, clamping the workpiece W between the support table 32A and the vise plate 32B. This fixes the workpiece W to the vise 32.

[0092] The user can adjust the vertical position of the vice plate 32B relative to the support table 32A by releasing the screw support member 32E fixed by the first thumb screw 32H and moving the screw support member 32E in the vertical direction. Furthermore, by releasing the screw support member 32E fixed by the first thumb screw 32H and rotating the screw support member 32E in the horizontal direction, the user can adjust the horizontal (left-right) position of the vice plate 32B relative to the support table 32A. The user can also adjust the horizontal (left-right) position of the vice plate 32B relative to the support table 32A by releasing the guide rod 32F fixed by the second thumb screw 32J and rotating the guide rod 32F.

[0093] The fence 33 is provided on the upper surface of the base 31. The fence 33 supports the workpiece W placed on the support table 32A from the side. In this embodiment, the fence 33 supports the workpiece W placed on the support table 32A from the front (user side). The fence 33 is plate-shaped. The fence 33 is formed by bending a metal plate. The fence 33 has a fixing portion 33A that is fixed to the base 31 and a facing portion 33B that faces the workpiece W. The fixing portion 33A is fixed to the upper plate portion 31A by a screw 33C. The facing portion 33B has a contact surface 33D that faces the workpiece W. The workpiece W is fixed to the vise 32 in a state where it is in contact with at least a part of the contact surface 33D. The contact surface 33D is perpendicular to the front-rear axis. The contact surface 33D faces the rear (opposite user side). The vise 32 is positioned behind the contact surface 33D (on the side opposite the user).

[0094] A groove 33E is provided to the right of the center of the fence 33 in the left-right direction. The groove 33E is elongated in the vertical direction. When the band saw 1 is positioned at its bottom dead center, the blade 2 is inserted into the groove 33E. The blade 2 is movable vertically within the groove 33E.

[0095] The mounting arm 34 supports the band saw 1. The band saw 1 is attached to the mounting arm 34. The mounting arm 34 is pivotably supported on the base 31. The mounting arm 34 is pivotable about a pivot point AX. The axis of the pivot point AX extends in the left-right direction. The axis of the pivot point AX is parallel to the left-right axis. The pivot point AX is located behind (on the opposite side of the user) the drive wheel 15.

[0096] As shown in Figure 23, in this embodiment, the base 31 includes a bracket 31E. The bracket 31E is fixed to the upper plate portion 31A. The mounting arm 34 is pivotably supported on the bracket 31E of the base 31 around a pivot point AX. The bracket 31E is located on the right rear of the upper surface of the upper plate portion 31A. The bracket 31E has a pair of support portions 31F that are spaced apart from each other in the left-right direction. The pivot shaft 39 of the mounting arm 34 is supported on the support portion 31F of the bracket 31E. As shown in Figures 18 and 23, the pivot shaft 39 includes a bolt 39A and a nut 39B coupled to the bolt 39A. The central axis of the pivot shaft 39 coincides with the axis of the pivot point AX. The mounting arm 34 is pivotably supported on the pivot shaft 39.

[0097] The mounting arm 34 has a cylindrical portion 34C, a first arm portion 34A, and a second arm portion 34B. The cylindrical portion 34C is positioned around the pivot point AX. The cylindrical portion 34C is positioned around the pivot shaft 39. The cylindrical portion 34C rotates around the pivot point AX. The first arm portion 34A extends forward (towards the user) from the cylindrical portion 34C. The second arm portion 34B extends upward from the cylindrical portion 34C. The first arm portion 34A and the second arm portion 34B each pivot around the pivot point AX. The first arm portion 34A and the second arm portion 34B each are fixed to the band saw 1.

[0098] The mounting arm 34 is made of die-cast alloy. In one embodiment, the mounting arm 34 is formed by die-casting an aluminum alloy. Alternatively, the mounting arm 34 may be formed by die-casting a magnesium alloy.

[0099] The first fastener 35 secures the first arm portion 34A to the band saw 1. The second fastener 36 secures the second arm portion 34B to the band saw 1. The first arm portion 34A is secured to at least a part of the band saw 1 by the first fastener 35. The second arm portion 34B is secured to at least a part of the band saw 1 by the second fastener 36.

[0100] The first fastener 35 and the second fastener 36 are thumb screws. A thumb screw is a screw that can be tightened by the user with their fingers. As shown in Figures 8 and 22, an opening 34D into which the threaded portion of the first fastener 35 is inserted is provided in the first arm portion 34A. A screw hole 34E into which the threaded portion of the second fastener 36 is inserted is provided in the second arm portion 34B. As shown in Figure 1, a screw hole 6A into which the threaded portion of the first fastener 35 is inserted is provided in the lower left rear of the base housing 6 of the band saw 1. An opening 5A into which the threaded portion of the second fastener 36 is inserted is provided in the rear of the plate 5 of the band saw 1.

[0101] When the first fastener 35 is rotated with its threaded portion inserted into the screw hole 6A through the opening 34D, the threaded portion of the first fastener 35 engages with the screw hole 6A, and the first arm portion 34A is fixed to the base housing 6. When the second fastener 36 is rotated with its threaded portion inserted into the screw hole 34E through the opening 5A, the threaded portion of the second fastener 36 engages with the screw hole 34E, and the second arm portion 34B is fixed to the plate 5. The user can fix the first arm portion 34A to the band saw 1 by pinching and rotating the first fastener 35 with their fingers without using any tools. The user can also fix the second arm portion 34B to the band saw 1 by pinching and rotating the second fastener 36 with their fingers without using any tools.

[0102] The mounting arm 34 rotates within a specified range of motion around the pivot point AX. The mounting arm 34 rotates between the top dead center and the bottom dead center. The top dead center is the highest position in the range of motion. The bottom dead center is the lowest position in the range of motion.

[0103] When the mounting arm 34 rotates around the pivot point AX, the tip of the first arm portion 34A moves substantially vertically. When the mounting arm 34 is positioned at its top dead center, the tip of the first arm portion 34A is positioned at the uppermost position within its range of motion. When the mounting arm 34 is positioned at its bottom dead center, the tip of the first arm portion 34A is positioned at the lowermost position within its range of motion.

[0104] When the mounting arm 34 rotates around the pivot point AX, the tip of the second arm portion 34B moves substantially in the front-rear direction. When the mounting arm 34 is positioned at its top dead center, the tip of the second arm portion 34B is positioned at the rearmost position within the range of motion of the tip of the second arm portion 34B. When the mounting arm 34 is positioned at its bottom dead center, the tip of the second arm portion 3BA is positioned at the frontmost position within the range of motion of the tip of the second arm portion 34B.

[0105] When the mounting arm 34 rotates around the pivot point AX, the band saw 1 attached to the mounting arm 34 rotates so as to pivot around the pivot point AX. The band saw 1 is mounted on the mounting arm 34 such that the driven wheel 16 is positioned behind the drive wheel 15 (on the opposite side of the user). The pivot point AX is positioned behind the drive wheel 15 (on the opposite side of the user). In this embodiment, the pivot point AX is positioned behind the driven wheel 16 (on the opposite side of the user). The front end (user-side end) of the band saw 1 moves substantially vertically. When the mounting arm 34 is positioned at top dead center, the front end of the band saw 1 is positioned at the uppermost position within the range of motion of the front end of the band saw 1. When the mounting arm 34 is positioned at bottom dead center, the front end of the band saw 1 is positioned at the lowermost position within the range of motion of the front end of the band saw 1. When the mounting arm 34 is positioned at top dead center, the band saw 1 is positioned at top dead center. When the mounting arm 34 is positioned at its bottom dead center, the band saw 1 is positioned at its bottom dead center.

[0106] As shown in Figures 9 and 21, a screw 50 is fixed to the cylindrical portion 34C of the mounting arm 34. The screw 50 is inserted from the right side of the cylindrical portion 34C into a screw hole provided in the cylindrical portion 34C. The head of the screw 50 protrudes to the right from the right surface of the cylindrical portion 34C. The head of the screw 50 is positioned behind the bracket 31E. The screw 50 defines the range of rotation of the mounting arm 34. The screw 50 defines the top dead center of the mounting arm 34. When the mounting arm 34 moves upward from its bottom dead center, the head of the screw 50 contacts the rear surface of the bracket 31E, restricting the upward movement of the mounting arm 34. The position of the mounting arm 34 where the head of the screw 50 contacts the rear surface of the bracket 31E is the top dead center of the mounting arm 34.

[0107] As shown in Figure 21, a protrusion 34F is provided on the lower surface of the first arm portion 34A. The protrusion 34F projects downward from the lower surface of the first arm portion 34A. The protrusion 34F is positioned above the upper plate portion 31A. The protrusion 34F defines the rotation range of the mounting arm 34. The protrusion 34F defines the bottom dead center of the mounting arm 34. When the mounting arm 34 moves downward from its top dead center, the protrusion 34F contacts the upper surface of the base 31, restricting the downward movement of the mounting arm 34. The position of the mounting arm 34 where the protrusion 34F and the upper surface of the base 31 contact is the bottom dead center of the mounting arm 34.

[0108] The return device 40 automatically returns the mounting arm 34 to its top dead center. In this embodiment, the return device 40 includes a spring 41 interposed between the base 31 and the mounting arm 34. The biasing force of the spring 41 returns the mounting arm 34 to its top dead center. The biasing force of the spring 41 maintains the position of the mounting arm 34 at the top dead center. In this embodiment, the spring 41 is a torsion spring.

[0109] As shown in Figures 21 and 23, the spring 41 has a coil portion 41A, an arm portion 41B protruding from one end of the coil portion 41A, and an arm portion 41C protruding from the other end of the coil portion 41A. The pivot shaft 39 of the mounting arm 34 is inserted inside the coil portion 41A. One arm portion 41B of the spring 41 contacts the bracket 31E of the base 31. The one arm portion 41B of the spring 41 presses the bracket 31E of the base 31 from above. The other arm portion 41C of the spring 41 contacts the cylindrical portion 34C of the mounting arm 34. The other arm portion 41C of the spring 41 presses the mounting arm 34 to its top dead center.

[0110] As shown in Figure 18, the spring 41 is positioned inside the cylindrical portion 34C. The pivot shaft 39 is inserted inside the coil portion 41A. The pivot shaft 39 includes a bolt 39A and a nut 39B. The head of the bolt 39A is positioned to the right of the right support portion 31F. The nut 39B is positioned to the left of the left support portion 31F.

[0111] A sleeve 39C is positioned around the shaft of bolt 39A. The shaft of bolt 39A is positioned inside the sleeve 39C. The sleeve 39C is supported by a support portion 31F. The support portion 31F supports the shaft of bolt 39A via the sleeve 39C.

[0112] The first sleeve 39D and the second sleeve 39E are positioned around the sleeve 39C. The first sleeve 39D is positioned to the right of the second sleeve 39E. The first sleeve 39D and the second sleeve 39E are positioned between the left support portion 31F and the right support portion 31F. The external shape and dimensions of the first sleeve 39D and the second sleeve 39E are substantially the same. The coil portion 41A is positioned around the first sleeve 39D and the second sleeve 39E.

[0113] Sleeve 39F is positioned between nut 39B and left support portion 31F. Sleeve 39F is positioned around sleeve 39C. The right side of sleeve 39C and sleeve 39F are connected to cylindrical portion 34C.

[0114] A washer 39G is placed between the head of bolt 39A and the right-side support part 31F. A washer 39H is placed between sleeve 39F and nut 39B. The nut 39B is a locking nut (nylon nut: JIS B1199-1) in which a polyamide O-ring 39J is provided as a resin component in the annular groove at the opening of the screw hole.

[0115] The support member 37 is fixed to the upper surface of the base 31. The support member 37 protrudes upward from the upper surface of the base 31. The support member 37 is positioned to the left of the mounting arm 34. The support member 37 is positioned opposite the left side of the first arm portion 34A.

[0116] The locking member 38 is movably supported by the support member 37. The locking member 38 is a pin-shaped (rod-shaped) member that is long in the left-right direction. As shown in Figure 20, the support member 37 has a support hole 37A in which at least a portion of the locking member 38 is placed. The locking member 38 is movably supported in the support hole 37A of the support member 37 in the left-right direction. The locking member 38 moves in the left-right direction to the left of the first arm portion 34A. The locking member 38 fixes the mounting arm 34 by being inserted into at least a portion of the first arm portion 34A.

[0117] As shown in Figure 20, an O-ring 38A is provided around the locking member 38. The O-ring 38A is positioned in a groove provided on the outer surface of the locking member 38. The O-ring 38A is positioned at the boundary between the outer surface of the locking member 38 and the inner surface of the support hole 37A. The O-ring 38A is in contact with the inner surface of the support hole 37A. The contact of the O-ring 38A with the inner surface of the support hole 37A prevents the locking member 38 from moving unintentionally. In addition, when the locking member 38 moves, the O-ring 38A moves while in contact with the inner surface of the support hole 37A, so a moderate resistance is obtained when the locking member 38 moves.

[0118] As shown in Figures 20, 22, and 23, the first arm portion 34A has a bottom dead center insertion hole 34G and a top dead center insertion hole 34H. Each of the bottom dead center insertion hole 34G and the top dead center insertion hole 34H is provided so as to be recessed to the left from the left side surface of the first arm portion 34A. The bottom dead center insertion hole 34G is positioned above the top dead center insertion hole 34H.

[0119] The locking member 38 is moved to the right while supported by the support member 37, and is inserted into at least one of the insertion hole 34G for the bottom dead center and the insertion hole 34H for the top dead center. When the locking member 38 is inserted into the insertion hole 34G for the bottom dead center, the mounting arm 34 is fixed at the bottom dead center. When the locking member 38 is inserted into the insertion hole 34H for the top dead center, the mounting arm 34 is fixed at the top dead center.

[0120] The first arm portion 34A has a storage portion 34J that houses at least a part of the first fastener 35. In this embodiment, the storage portion 34J is a screw hole into which the threaded portion of the first fastener 35 is inserted. As shown in Figure 22, the storage portion 34J is provided on the rear side of the opening 34D. The storage portion 34J is provided next to the opening 34D. The first fastener 35 is fixed to the first arm portion 34A by the connection of the threaded portion of the first fastener 35 to the screw hole which is the storage portion 34J. As shown in Figure 22, when the band saw 1 is not attached to the stand 30, the loss of the first fastener 35 is suppressed by the connection of the threaded portion of the first fastener 35 to the screw hole which is the storage portion 34J. Even when the band saw 1 cannot be attached to the stand 30, the threaded portion of the second fastener 36 is connected to the threaded hole 34E of the second arm portion 34B, thereby fixing the second fastener 36 to the second arm portion 34B and preventing the loss of the second fastener 36.

[0121] As described above, the stopper plate 20 is fixed to the base housing 6 by the fixing lever 25. The stopper plate 20 is adjustable in the vertical position relative to the base housing 6. The stopper plate 20 is movable vertically while the slit 20B is guided by the rotating member 25A and the stopper pin 25C. After the stopper plate 20 is moved vertically with the fixing released, the fixing lever 25 is rotated in one direction, thereby fixing the stopper plate 20 to any position in the vertical direction. When the band saw 1 is attached to the stand 30, the stopper plate 20 is positioned as high as possible within its range of motion. That is, when the band saw 1 is attached to the stand 30, the stopper plate 20 is fixed to the housing 3 such that the amount of downward protrusion from the lower end of the housing 3 is minimized.

[0122] As shown in Figures 1, 8, and 19, the stopper plate 20 is fixed to the base housing 6 by a fixing lever 25. The fixing lever 25 is connected to the left side of the base housing 6 via a rotating member 25A. The fixing lever 25 and the rotating member 25A are fixed together by a screw 25B. The rotating member 25A has a fixed portion 25A1 which is fixed to the fixing lever 25 by the screw 25B, and a threaded portion 25A2 which is located to the right of the fixed portion 25A1. The threaded portion 25A2 is inserted into a threaded hole 6B provided in the base housing 6. The diameter of the fixed portion 25A1 is larger than the diameter of the threaded portion 25A2. The fixed portion 25A1 is located to the left of the threaded portion 25A2. A washer 25D is placed between the right side of the fixed portion 25A1 and the stopper plate 20. At least a portion of the rotating member 25A is inserted into the slit 20B provided in the stopper plate 20 from the left side of the stopper plate 20. With at least a portion of the rotating member 25A inserted into the slit 20B, the threaded portion 25A2 is inserted into the threaded hole 6B.

[0123] The stopper pin 25C is positioned below the rotating member 25A. The stopper pin 25C is screwed into and fixed to the base housing 6. At least a portion of the stopper pin 25C protrudes to the left from the left side of the base housing 6. At least a portion of the stopper pin 25C is positioned in the slit 20B.

[0124] The slit 20B is long in the vertical direction. When the fixing lever 25 is rotated in one direction, the rotating member 25A is rotated in one direction, causing the rotating member 25A to move to the right. As the rotating member 25A moves to the right, the stopper plate 20 is sandwiched between the washer 25D and the base housing 6, and the stopper plate 20 is fixed to the base housing 6. When the fixing lever 25 is rotated in the other direction, the rotating member 25A is rotated in the other direction, causing the rotating member 25A to move to the left. As the rotating member 25A moves to the left, the fixing of the stopper plate 20 is released.

[0125] The stopper plate 20 is adjustable in its vertical position relative to the base housing 6. The stopper plate 20 is movable vertically while the slit 20B is guided by the rotating member 25A and the stopper pin 25C. After the stopper plate 20 is moved vertically with the locking mechanism released, the locking lever 25 is rotated in one direction, thereby locking the stopper plate 20 in any vertical position.

[0126] The stopper pin 25C defines the range of motion of the stopper plate 20. When the stopper pin 25C is positioned at its uppermost position within the range of motion of the stopper plate 20, it contacts the lower end of the slit 20B.

[0127] As shown in Figures 1 and 17, in the left-right direction parallel to the axis of the pivot point AX, the position of the cutting portion of the blade 2 relative to the handle 4 when the band saw 1 is mounted on the stand is the same as the position of the cutting portion of the blade 2 relative to the handle 4 when the band saw 1 is in normal use. When mounted on the stand, it means the state in which the band saw 1 is used while attached to the stand 30. When in normal use, it means the state in which the band saw 1 is used while detached from the stand 30. The cutting portion of the blade 2 means the part of the blade 2 that is positioned in the opening 9. The workpiece W is cut by the blade 2 positioned in the opening 9. As described above, even in normal use, the user holds the handle 4 while positioned in front of the band saw 1 and performs the work. In this embodiment, in both when mounted on the stand and in normal use, the cutting portion of the blade 2 is positioned to the left of the handle 4.

[0128] As shown in Figure 13, in the front-rear direction, the battery pack 24 mounted on the battery mounting section 14 is positioned in front of (towards the user) the position Pa which is half the distance La from the pivot point AX to the front end (user-side end) of the housing 3.

[0129] <How to use a band saw> Next, we will explain how to use the band saw 1. During normal use, the user holds the handle 4 with their right hand while positioned in front of the band saw 1. When the user holds the handle 4 with their right hand while positioned in front of the band saw 1, the cutting portion of the blade 2 is positioned to the left of the handle 4. The user can see the cutting portion of the blade 2 while holding the handle 4 with their right hand.

[0130] During normal use, when cutting the workpiece W, the user operates the main switch 21 by pulling it with the fingers of their right hand, which is gripping the handle 4. When the main switch 21 is pulled, the motor 13 is driven and the blade 2 rotates. While the blade 2 is rotating, the blade 2, which is positioned in the opening 9, is pressed against the workpiece W, thereby cutting the workpiece W. When cutting the workpiece W, the workpiece W is supported from the front by the stopper plate 20.

[0131] When using the stand, the stopper plate 20 is not used. When attaching the band saw 1 to the stand 30, the user operates the locking lever 25 to release the stopper plate 20, and then adjusts the position of the stopper plate 20 so that the amount of downward protrusion of the stopper plate 20 from the lower end of the housing 3 is minimized. After adjusting the position of the stopper plate 20 so that the amount of downward protrusion of the stopper plate 20 from the lower end of the housing 3 is minimized, the user operates the locking lever 25 to lock the stopper plate 20 in place.

[0132] When using the stand, the band saw 1 is attached to the mounting arm 34. The user secures the base housing 6 of the band saw 1 to the first arm portion 34A with the first fastener 35, and secures the plate 5 of the band saw 1 to the second arm portion 34B with the second fastener 36. The user then places the workpiece W on the support table 32A with the workpiece W in contact with the contact surface 33D of the fence 33, and then secures it with the vise 32. The workpiece W is supported from the front by the fence 33.

[0133] After the band saw 1 is attached to the mounting arm 34 and the workpiece W is secured by the vise 32, the user grips the handle 4 with their right hand while positioned in front of the band saw 1. When the user grips the handle 4 with their right hand while positioned in front of the band saw 1, the cutting portion of the blade 2 is positioned to the left of the handle 4. The user can see the cutting portion of the blade 2 while gripping the handle 4 with their right hand.

[0134] When using the stand, to cut the workpiece W, the user operates the main switch 21 with the fingers of their right hand, which is gripping the handle 4. When the main switch 21 is pulled, the motor 13 is driven and the blade 2 rotates. While the blade 2 is rotating, the user moves the handle 4 downward so that the mounting arm 34 moves to the bottom dead center. As the handle 4 moves downward, the blade 2 positioned in the opening 9 approaches the workpiece W. The workpiece W is cut when the blade 2 positioned in the opening 9 is pressed against the workpiece W. When the workpiece W is cut, it is supported from the front by the fence 33.

[0135] The battery pack 24 is positioned in front of position Pa (towards the user). Therefore, when moving the band saw 1 to the bottom dead center, the mass of the battery pack 24 makes it easier for the band saw 1 to move to the bottom dead center.

[0136] After the band saw 1 has moved to the bottom dead center and the workpiece W has been cut by the blade 2, the user releases the operation of the main switch 21 to stop the motor 13. After the motor 13 has stopped, the mounting arm 34 to which the band saw 1 is attached is automatically returned to the top dead center by the return device 40 when the user releases their hand from the band saw 1 or loosens the force pressing the band saw 1 downwards.

[0137] When replacing, for example, the blade 2 with the band saw 1 attached to the mounting arm 34, the user inserts the locking member 38 into the top dead center insertion hole 34H. The insertion of the locking member 38 into the top dead center insertion hole 34H fixes the position of the band saw 1 at top dead center. With the band saw 1 fixed at top dead center, the user can then replace, for example, the blade 2.

[0138] For example, when transporting or storing the stand 30, the user inserts the locking member 38 into the bottom dead center insertion hole 34G. The insertion of the locking member 38 into the bottom dead center insertion hole 34G fixes the stand 30 in the bottom dead center position. The user can then transport or store the stand 30 in its compact state.

[0139] [effect] As described above, in this embodiment, the stand 30 to which the band saw 1 is attached comprises a base 31, a mounting arm 34 that is pivotably supported on the base 31 around a pivot point AX and to which the band saw 1 is attached, and a return device 40 that automatically returns the mounting arm 34 to its top dead center.

[0140] In the above configuration, when moving the band saw 1 to the top dead center, the user of the band saw 1 does not need to lift it themselves. Therefore, the burden on the user is reduced. Also, because the user does not need to lift the band saw 1 themselves, they can quickly move on to other tasks. Therefore, a decrease in work efficiency is suppressed, and the length of work time is suppressed.

[0141] In this embodiment, the return device 40 includes a spring 41 interposed between the base 31 and the mounting arm 34. The biasing force of the spring 41 holds the mounting arm 34 in the top dead center position.

[0142] In the above configuration, the biasing force of the spring 41 automatically returns the mounting arm 34 to the top dead center, and the position of the mounting arm 34 is rationally maintained at the top dead center. For example, the position of the band saw 1 is maintained at the top dead center without the use of a locking mechanism.

[0143] In this embodiment, the spring 41 is a torsion spring. The pivot shaft 39 of the mounting arm 34 is inserted into the coil portion 41A of the spring 41. One arm portion 41B of the spring 41 presses against the base 31, and the other arm portion 41C of the spring 41 presses against the mounting arm 34 until it reaches its top dead center.

[0144] The above configuration improves the ease of assembly when manufacturing the stand 30. It also improves the ease of work when attaching the band saw 1 to the stand 30.

[0145] In this embodiment, the band saw 1 includes a drive wheel 15 rotated by a motor 13, a driven wheel 16, and a blade 2 that is placed on the drive wheel 15 and the driven wheel 16. The driven wheel 16 is positioned behind the drive wheel 15 (on the opposite side of the user), and the pivot point AX is positioned behind the drive wheel 15 (on the opposite side of the user).

[0146] In the above configuration, the drive wheel 15 is positioned at the front (user side) both when the stand is attached and when it is in normal use. The user can perform the work using the same operation in both cases. When the stand is attached, it refers to the state in which the band saw 1 is used while attached to the stand 30. When it is in normal use, it refers to the state in which the band saw 1 is used while detached from the stand 30.

[0147] In this embodiment, the band saw 1 includes a housing 3 that accommodates a drive wheel 15 and a driven wheel 16, and a handle 4 fixed to the housing 3. In the left-right direction parallel to the axis of the pivot point AX, the position of the cutting portion of the blade 2 relative to the handle 4 when the band saw 1 is mounted on a stand is the same as the position of the cutting portion of the blade 2 relative to the handle 4 when the band saw 1 is in normal use.

[0148] In the above configuration, the user can perform the same operations when the stand is attached and when it is in normal use.

[0149] In this embodiment, the cutting portion of the blade 2 is positioned to the left of the handle 4, both when the stand is attached and during normal use.

[0150] In the above configuration, when the user grips the handle 4 with their right hand, the user can easily see the cutting portion of the blade 2, thus suppressing a decrease in work efficiency.

[0151] In this embodiment, the mounting arm 34 has a cylindrical portion 34C positioned around the pivot point AX, a first arm portion 34A extending from the cylindrical portion 34C toward the user, and a second arm portion 34B extending upward from the cylindrical portion 34C. The stand 30 includes a first fastener 35 for fixing the first arm portion 34A to the band saw 1, and a second fastener 36 for fixing the second arm portion 34B to the band saw 1.

[0152] In the above configuration, the band saw 1 is stably fixed to the stand 30 by the first fastener 35 and the second fastener 36, which are spaced apart from each other.

[0153] In this embodiment, at least one of the first fastener 35 and the second fastener 36 is a thumb screw.

[0154] In the above configuration, the user can attach and detach the band saw 1 to the stand 30 without using any tools. A thumb screw is a screw that can be tightened with the fingers. In this embodiment, both the first fastener 35 and the second fastener 36 are thumb screws.

[0155] In this embodiment, the stand 30 includes a vise 32 provided on the base 31 for fixing the workpiece W, and a fence 33 provided on the base 31 for supporting the workpiece W. The contact surface 33D of the fence 33 facing the workpiece W faces the rear side (opposite the user side), and the vise 32 is positioned behind the contact surface 33D (opposite the user side).

[0156] In the above configuration, when the workpiece W moves forward (towards the user) due to the force transmitted by the blade 2 towards the user during cutting, the contact surface 33D of the fence 33 faces backward (away from the user), so the fence 33 can suitably support the workpiece W. Since the vise 32 is positioned behind (away from the user) the contact surface 33D of the fence 33, the vise 32 can suitably fix the workpiece W positioned on the fence 33.

[0157] In this embodiment, the stand 30 to which the band saw 1 is mounted includes a base 31 and a mounting arm 34 that is pivotably supported on the base 31 around a pivot point AX and to which the band saw 1 is mounted. The band saw 1 includes a drive wheel 15 rotated by a motor 13, a driven wheel 16, a blade 2 that is placed on the drive wheel 15 and the driven wheel 16, a housing 3 that accommodates the drive wheel 15 and the driven wheel 16, and a battery mounting section 14 to which a battery pack 24 is mounted. The driven wheel 16 is positioned behind the drive wheel 15 (on the opposite side of the user), and the pivot point AX is positioned behind the drive wheel 15 (on the opposite side of the user). The battery pack 24 mounted in the battery mounting section 14 is positioned in front of (on the user side of) a position Pa that is half the distance La from the pivot point AX to the user-side end of the housing 3.

[0158] In the above configuration, when moving the band saw 1 to the bottom dead center, the mass of the battery pack 24 makes it easier for the band saw 1 to move to the bottom dead center. Therefore, the burden on the user is reduced. In addition, the user can smoothly attach and detach the battery pack 24 to the battery mounting section 14.

[0159] In this embodiment, the band saw 1 may have a handle 4 fixed to the housing 3. The battery mounting portion 14 is provided at the user-side end of the handle 4.

[0160] In the above configuration, the battery pack 24, which is a heavy object, is positioned at the user-side end of the handle 4, which improves the feel of operation when the user moves the band saw 1 to the bottom dead center.

[0161] In this embodiment, the stand 30 to which the band saw 1 is attached comprises a base 31, a mounting arm 34 having a cylindrical portion 34C that is pivotably supported on the base 31 around a pivot point AX and arranged around the pivot point AX, a first arm portion 34A extending from the cylindrical portion 34C toward the user, and a second arm portion 34B extending upward from the cylindrical portion 34C, a first fastener 35 for fixing the first arm portion 34A to the band saw 1, and a second fastener 36 for fixing the second arm portion 34B to the band saw 1.

[0162] In the above configuration, the band saw 1 is stably fixed to the stand 30 by the first fastener 35 and the second fastener 36, which are spaced apart from each other.

[0163] In this embodiment, the stand 30 includes a support member 37 fixed to the base 31, and a locking member 38 movably supported by the support member 37 and fixed to the mounting arm 34 by being inserted into at least a portion of the first arm portion 34A.

[0164] In the above configuration, the position of the mounting arm 34 is fixed by the locking member 38. In addition, the size of the locking mechanism, including the support member 37 and the locking member 38, is kept from increasing.

[0165] In this embodiment, the first arm portion 34A has a bottom dead center insertion hole 34G. The mounting arm 34 is fixed at the bottom dead center when the locking member 38 is inserted into the bottom dead center insertion hole 34G.

[0166] In the above configuration, the mounting arm 34 is fixed at its bottom dead center by the locking member 38. In addition, the size of the locking mechanism, including the support member 37 and the locking member 38, is kept from increasing.

[0167] In this embodiment, the first arm portion 34A has an insertion hole 34G for the bottom dead center and an insertion hole 34H for the top dead center. The mounting arm 34 is fixed at the bottom dead center when the locking member 38 is inserted into the insertion hole 34G for the bottom dead center. The mounting arm 34 is fixed at the top dead center when the locking member 38 is inserted into the insertion hole 34H for the top dead center.

[0168] In the above configuration, the mounting arm 34 is fixed in place at both the bottom dead center and the top dead center by the locking member 38. By fixing the mounting arm 34 in place at the top dead center, the user can, for example, replace the blade 2 while the band saw 1 is mounted on the stand 30. Fixing the mounting arm 34 in place at the top dead center prevents the band saw 1 from unintentionally moving downward when replacing the blade 2. In addition, the size of the locking mechanism, including the support member 37 and the locking member 38, is kept from increasing.

[0169] In this embodiment, the first arm portion 34A has a storage portion 34J that houses at least a part of the first fastener 35.

[0170] In the above configuration, the dead space of the first arm section 34A is effectively utilized.

[0171] In this embodiment, the outer shape of the base 31 is rectangular in plan view.

[0172] In the above configuration, the size of the stand 30 is kept to a minimum. Users can store the stand 30 in, for example, a narrow space.

[0173] In this embodiment, the base 31 is made of drawn steel sheet. The mounting arm 34 is made of die-cast alloy.

[0174] The above configuration achieves both lightness and high strength in the stand 30.

[0175] [Other embodiments] In the embodiment described above, the spring 41 of the return device 40 is a torsion spring. The spring 41 of the return device 40 may be a coil spring or a leaf spring.

[0176] In the above-described embodiment, the return device 40 includes a spring 41. The return device 40 may also include, for example, an air cylinder or an electric motor.

[0177] In the above-described embodiment, both the first fastener 35 and the second fastener 36 are thumb screws. Alternatively, one of the first fastener 35 and the second fastener 36 may be a thumb screw, and the other may be a regular screw that is tightened with a tool. [Explanation of Symbols]

[0178] 1…Band saw (portable band saw), 2…Blade, 3…Housing, 3A…Front housing, 3B…Rear housing, 3C…Bridge section, 4…Handle, 4A…First part, 4B…Second part, 4C…Third part, 5…Plate, 5A…Opening, 6…Base housing, 6A…Screw hole, 6B…Screw hole, 7…Cover housing, 7A…Opening, 7B…Opening, 8…Hinge, 9…Opening, 10…Screw, 11…Screw, 13…Motor, 14…Battery mounting section, 15…Drive wheel, 16…Driven wheel, 17…Tension adjustment lever, 18…Rear guide roller, 19…Front guide Roller, 20...Stopper plate, 20A...Slit, 20B...Slit, 21...Main switch, 22...Speed ​​dial, 23...Motor case, 24...Battery pack, 24A...Lock release button, 25...Fixing lever, 25A...Rotating member, 25A1...Fixing part, 25A2...Screw part, 25B...Screw, 25C...Stopper pin, 25D...Washer, 26...Lock-off operating member, 27...Lock-on operating member, 28...Hook, 29...Hook support member, 30...Stand (Stand for portable band saw), 31...Base, 31A...Top plate part, 31B...Side plate part, 31C...Recess, 3 1D...Hook part, 31E...Bracket, 31F...Support part, 32...Vice, 32A...Support table, 32A1...Block part, 32A2...Plate part, 32B...Vice plate, 32C...Screw, 32D...Knob, 32E...Screw support member, 32F...Guide rod, 32G...Rod support member, 32H...First thumb screw, 32J...Second thumb screw, 32K...Groove, 33...Fence, 33A...Fixing part, 33B...Opposite part, 33C...Screw, 33D...Contact surface, 33E...Groove, 34...Mounting arm, 34A...First arm part, 34B...Second arm part, 34C...Cylindrical part, 34D...Opening, 34E ...screw hole, 34F...protrusion, 34G...insertion hole for bottom dead center, 34H...insertion hole for top dead center, 34J...storage part, 35...first fastener, 36...second fastener, 37...support member, 37A...support hole, 38...locking member, 38A...O-ring, 39...pivot shaft, 39A...bolt, 39B...nut, 39C...sleeve, 39D...first sleeve, 39E...second sleeve, 39F...sleeve, 39G...washer, 39H...washer, 39J...O-ring, 40...return device, 41...spring, 41A...coil part, 41B...arm part, 41C...arm part, 42...light, 50...screw, AX...pivot pointLa…distance, Pa…position, W…material to be cut.

Claims

1. A stand for a portable band saw, on which a portable band saw can be attached, Bass and, A mounting arm is supported on the aforementioned base so as to be able to swing around a pivot point, and a portable band saw is attached to it. The system includes a return device that automatically returns the mounting arm to its top dead center. Stand for portable band saws.

2. The return device includes a spring interposed between the base and the mounting arm. The biasing force of the spring holds the mounting arm in the top dead center position. A stand for a portable band saw as described in claim 1.

3. The aforementioned spring includes a torsion spring. The pivot shaft of the mounting arm is inserted into the coil portion of the torsion spring. One arm portion of the torsion spring presses against the base, The other arm portion of the torsion spring presses the mounting arm up to the top dead center. A stand for a portable band saw as described in claim 2.

4. The aforementioned portable band saw has a drive wheel that rotates by a motor, a driven wheel, and a blade that is placed on the drive wheel and the driven wheel. The driven wheel is positioned on the side opposite to the user than the drive wheel. The pivot point is positioned on the side opposite to the user than the drive wheel. A stand for a portable band saw as described in claim 1.

5. The portable band saw comprises a housing that accommodates the drive wheel and the driven wheel, and a handle fixed to the housing. In the left-right direction parallel to the axis of the pivot point, the position of the cutting portion of the blade relative to the handle when the portable band saw is mounted on a stand is the same as the position of the cutting portion of the blade relative to the handle when the portable band saw is in normal use. A stand for a portable band saw as described in claim 4.

6. In both the case when the stand is attached and in the case of normal use, the cutting portion of the blade is positioned to the left of the handle. A stand for a portable band saw as described in claim 5.

7. The mounting arm has a cylindrical portion arranged around the pivot point, a first arm portion extending from the cylindrical portion toward the user, and a second arm portion extending upward from the cylindrical portion. A first fastener for fixing the first arm portion to the portable band saw, The device comprises a second fastener for securing the second arm portion to the portable band saw, A stand for a portable band saw as described in claim 4.

8. At least one of the first fastener and the second fastener is a thumb screw. A stand for a portable band saw as described in claim 7.

9. A vise is provided on the base for fixing the workpiece, The base is provided with a fence that supports the workpiece, The contact surface of the fence facing the workpiece faces the side away from the user. The vise is positioned on the side opposite to the user than the contact surface. A stand for a portable band saw as described in claim 1.

10. A stand for a portable band saw, on which a portable band saw can be attached, Bass and, The base is supported so as to be able to swing around a pivot point, and a mounting arm to which a portable band saw is attached is provided, The portable band saw comprises a drive wheel rotated by a motor, a driven wheel, a blade that is placed on the drive wheel and the driven wheel, a housing that accommodates the drive wheel and the driven wheel, and a battery mounting section on which a battery pack is attached. The driven wheel is positioned on the side opposite to the user than the drive wheel. The pivot point is positioned on the side opposite to the user than the drive wheel. The battery pack mounted in the battery mounting section is positioned closer to the user than half the distance from the pivot point to the user-side end of the housing. Stand for portable band saws.

11. The aforementioned portable band saw has a handle fixed to the housing, The battery mounting section is provided at the user-side end of the handle, A stand for a portable band saw according to claim 10.

12. A stand for a portable band saw, on which a portable band saw can be attached, Bass and, A mounting arm having a cylindrical portion arranged around the pivot point, supported on the base so as to be pivotable about the pivot point, a first arm portion extending from the cylindrical portion toward the user, and a second arm portion extending upward from the cylindrical portion, A first fastener for fixing the first arm portion to the portable band saw, The device comprises a second fastener for securing the second arm portion to the portable band saw, Stand for portable band saws.

13. A support member fixed to the base, The system includes a locking member that is movably supported by the support member and fixed to the mounting arm by being inserted into at least a portion of the first arm portion, A stand for a portable band saw according to claim 12.

14. The first arm portion has an insertion hole for bottom dead center, The locking member is inserted into the bottom dead center insertion hole, thereby fixing the mounting arm to the bottom dead center. A stand for a portable band saw according to claim 13.

15. The first arm portion has an insertion hole for the bottom dead center and an insertion hole for the top dead center, The locking member is inserted into the bottom dead center insertion hole, thereby fixing the mounting arm at the bottom dead center. The locking member is inserted into the top dead center insertion hole, thereby fixing the mounting arm at the top dead center. A stand for a portable band saw according to claim 13.

16. The first arm portion has a storage portion that houses at least a part of the first fastener. A stand for a portable band saw according to claim 12.

17. In a plan view, the outer shape of the base is rectangular. A stand for a portable band saw according to claim 12.

18. The aforementioned base is made of drawn steel sheet, The aforementioned mounting arm is made of die-cast alloy. A stand for a portable band saw according to claim 12.

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