Reciprocating saw

Abstract

To expose an opening provided on the front surface of a housing with good workability.SOLUTION: A reciprocating saw has: a motor; a slider arranged on a front side of the motor, to which a blade is fixed; a reciprocation conversion mechanism for reciprocating the slider in the front / rear direction on the basis of the rotational force of the motor; a housing storing the slider; and a shoe which has a blade opening where the blade is arranged, and is mounted on the housing so as to cover the opening provided on the front surface of the housing. The shoe retreats from the front surface of the housing so as to expose the opening, in a state of being mounted on the housing.SELECTED DRAWING: Figure 23

Description

[Technical Field]

[0001] The technology disclosed herein relates to a reciprocating saw. [Background technology]

[0002] BACKGROUND ART In the technical field related to reciprocating saws, a reciprocating saw having a shoe attached to the front end of a housing, such as that disclosed in Patent Document 1, is known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 3-19623 Summary of the Invention [Problem to be solved by the invention]

[0004] When replacing a component arranged inside the housing, a shoe is removed from the front end of the housing. By removing the shoe from the front end of the housing, an opening provided in the front face of the housing is exposed. The component is removed through the opening provided in the front face of the housing. There is a demand for a technology that allows the opening to be exposed with good workability.

[0005] The technology disclosed in this specification aims to expose an opening provided on the front surface of a housing with good workability. [Means for solving the problem]

[0006] This specification discloses a reciprocating saw. The reciprocating saw may include a motor, a slider disposed forward of the motor and to which a blade is fixed, a reciprocating motion conversion mechanism that reciprocates the slider in a forward and backward direction based on the rotational force of the motor, a housing that accommodates the slider, and a shoe that has a blade opening in which the blade is disposed and is attached to the housing so as to cover an opening provided in a front surface of the housing. The shoe may be retracted from the front surface of the housing while attached to the housing so as to expose the opening. [Effects of the Invention]

[0007] According to the technology disclosed in this specification, the opening provided on the front surface of the housing can be exposed with good workability. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front perspective view showing a reciprocating saw according to a first embodiment. [Figure 2] FIG. 2 is a perspective view showing the reciprocating saw according to the first embodiment, as seen from the rear side. [Figure 3] FIG. 3 is a view of the reciprocating saw according to the first embodiment as seen from above. [Figure 4] FIG. 4 is a view of the reciprocating saw according to the first embodiment as seen from below. [Figure 5] FIG. 5 is a view of the reciprocating saw according to the first embodiment as seen from the right side. [Figure 6] FIG. 6 is a cross-sectional view showing the reciprocating saw according to the first embodiment. [Figure 7] FIG. 7 is an exploded perspective view from the rear showing the reciprocating saw according to the first embodiment. [Figure 8] FIG. 8 is a perspective view showing the vise according to the first embodiment, as viewed from the front side. [Figure 9] FIG. 9 is a perspective view showing the vise according to the first embodiment, as seen from the rear side. [Figure 10] FIG. 10 is a view of the vise according to the first embodiment as seen from the right side. [Figure 11] FIG. 11 is a cross-sectional view showing the vise according to the first embodiment. [Figure 12] FIG. 12 is a cross-sectional view showing a part of the vise according to the first embodiment. [Figure 13] FIG. 13 is a perspective view showing a part of the vise according to the first embodiment, seen from the rear side. [Figure 14] FIG. 14 is a perspective view from the rear side showing a part of the chain before it is attached to the vise base according to the first embodiment. [Figure 15] FIG. 15 is an exploded perspective view from the rear side showing a part of the vise according to the first embodiment. [Figure 16] FIG. 16 is a view of a part of the vise according to the first embodiment seen from above. [Figure 17] FIG. 17 is a perspective view showing the elastic member according to the first embodiment, as viewed from the rear side. [Figure 18] FIG. 18 is a view of a part of the chain just before it is inserted into the insertion space according to the first embodiment, as seen from the right side. [Figure 19] FIG. 19 is a perspective view showing the front part of the reciprocating saw according to the embodiment. [Figure 20] FIG. 20 is a perspective view showing a fixing structure between a slider and a blade according to the embodiment. [Figure 21] FIG. 21 is a view of the front part of the reciprocating saw according to the embodiment, seen from below. [Figure 22] FIG. 22 is a diagram illustrating a method for replacing the blade clamp according to the embodiment. [Figure 23] FIG. 23 is a diagram illustrating a method for replacing the blade clamp according to the embodiment. [Figure 24] FIG. 24 is a cross-sectional view for explaining a method for fixing the vise according to the second embodiment to a workpiece. [Figure 25] FIG. 25 is a cross-sectional view for explaining a method for fixing the vise according to the second embodiment to a workpiece. [Figure 26]FIG. 26 is a cross-sectional view for explaining a method for fixing the vise according to the second embodiment to a workpiece. [Figure 27] FIG. 27 is a cross-sectional view for explaining a method for fixing the vise according to the second embodiment to a workpiece. [Figure 28] FIG. 28 is a diagram schematically showing a part of the vise according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] In one or more embodiments, a reciprocating saw may include a motor, a slider disposed forward of the motor and having a blade fixed thereto, a reciprocating motion conversion mechanism that reciprocates the slider back and forth based on the rotational force of the motor, a housing that accommodates the slider, and a shoe that has a blade opening in which the blade is disposed and is attached to the housing so as to cover an opening provided in a front surface of the housing. The shoe may be retracted from the front surface of the housing while attached to the housing to expose the opening.

[0010] In the above configuration, the shoe, while attached to the housing, retreats from the front surface of the housing so as to expose the opening. Since the opening can be exposed without completely separating the shoe from the housing, the opening can be exposed with good workability.

[0011] In one or more embodiments, a reciprocating saw may include a motor, a slider disposed forward of the motor and having a blade fixed thereto, a reciprocating motion conversion mechanism that reciprocates the slider back and forth based on the rotational force of the motor, a housing that accommodates the slider, and a shoe having a blade opening in which the blade is disposed and attached to the housing so as to cover an opening provided in a front surface of the housing. The shoe may be rotatably attached to the housing and may be retracted from the front surface of the housing by rotating.

[0012] In the above-described configuration, the shoe is retracted from the front surface of the housing by rotating, so that the opening provided in the front surface of the housing is exposed for good workability.

[0013] In one or more embodiments, the shoe may move forward away from the front face of the housing and then pivot away from the front face of the housing.

[0014] In the above configuration, the shoe is smoothly rotated after moving forward.

[0015] In one or more embodiments, the shoe may be pivotally mounted to the housing so that it can change from facing the front of the housing to facing the side of the housing.

[0016] In the above configuration, the opening is exposed with good workability.

[0017] In one or more embodiments, the shoe may have a front plate portion facing the front surface of the housing and having a blade opening, and a lower plate portion facing the lower surface of the housing and having a slot that is long in the front-to-rear direction. The reciprocating saw may include a screw that is coupled to a screw hole provided in the lower surface of the housing via the slot. With the screw inserted in the screw hole, the shoe may move forward away from the front end of the housing and then rotate so that the front plate portion faces the side surface of the housing.

[0018] In the above configuration, when the shoe moves forward, the shoe is guided by the screw, and when the shoe rotates, the shoe can rotate around the screw.

[0019] In one or more embodiments, the elongated hole may be provided on one side of the center of the lower plate portion in the left-right direction. The shoe may rotate to face one of the left and right side surfaces of the housing.

[0020] In the above configuration, the shoe is smoothly rotated after moving forward.

[0021] Hereinafter, an embodiment will be described with reference to the drawings. In the embodiment, the positional relationship of each part will be described using the terms left, right, front, rear, top, and bottom. These terms indicate relative positions or directions based on the center of the reciprocating saw 1. The reciprocating saw 1 has a motor 8 as a power source.

[0022] In the embodiment, the direction parallel to the rotation axis AX of the motor 8 is referred to as the axial direction, the direction circumferentially around the rotation axis AX is referred to as the circumferential direction or rotation direction, and the radial direction of the rotation axis AX is referred to as the radial direction.

[0023] In this embodiment, the rotation axis AX extends in the front-rear direction. An axial direction parallel to the rotation axis AX is the front-rear direction. In addition, in the radial direction, a position closer to or approaching the rotation axis AX will be referred to as the radially inner side, and a position farther from or away from the rotation axis AX will be referred to as the radially outer side.

[0024] [First embodiment] A first embodiment will be described.

[0025] <Reciprocating saw> FIG. 1 is a perspective view from the front showing the reciprocating saw 1 according to the first embodiment. FIG. 2 is a perspective view from the rear showing the reciprocating saw 1 according to the first embodiment. FIG. 3 is a view of the reciprocating saw 1 according to the first embodiment as seen from above. FIG. 4 is a view of the reciprocating saw 1 according to the first embodiment as seen from below. FIG. 5 is a view of the reciprocating saw 1 according to the first embodiment as seen from the right side. FIG. 6 is a cross-sectional view of the reciprocating saw 1 according to the first embodiment. FIG. 7 is an exploded perspective view from the rear showing the reciprocating saw 1 according to the first embodiment.

[0026] The reciprocating saw 1 includes a rear housing 2, a front housing 4, a battery mounting section 5, a vise mounting section 6, a controller 7, a motor 8, a fan 9, a reciprocating motion conversion mechanism 10, a slider 11, and a shoe 12.

[0027] The rear housing 2 is made of synthetic resin. The rear housing 2 includes a left housing 2L and a right housing 2R disposed on the right side of the left housing 2L. The left housing 2L and the right housing 2R form a pair of half-split housings. The rear housing 2 is composed of a pair of half-split housings. The left housing 2L and the right housing 2R are fixed together with a plurality of screws 2S.

[0028] The rear housing 2 includes a grip portion 21 , a storage portion 22 , a battery holding portion 23 , a connecting portion 24 , and a guard portion 25 .

[0029] The grip portion 21 is held by an operator. The storage portion 22 stores the controller 7 and the motor 8. The storage portion 22 is cylindrical. The motor 8 is disposed in front of the controller 7. The battery holding portion 23 holds the battery pack 13 via the battery attachment portion 5.

[0030] The connecting portion 24 is arranged below the grip portion 21. The connecting portion 24 is arranged to connect the storage portion 22 and the battery holding portion 23. The grip portion 21 is also arranged to connect the storage portion 22 and the battery holding portion 23. The grip portion 21 and the connecting portion 24 are each shaped like a rod that is long in the front-to-rear direction. The storage portion 22 is arranged in front of the grip portion 21 and the connecting portion 24. The battery holding portion 23 is arranged behind the grip portion 21 and the connecting portion 24. In the embodiment, the rear housing 2 includes a loop-shaped handle portion.

[0031] The guard portion 25 protrudes rearward from the lower portion of the battery holding portion 23. The lower surface of the battery pack 13 attached to the battery attachment portion 5 and the upper surface of the guard portion 25 face each other with a gap between them. An operator can perform work while supporting the guard portion 25 from below with their hands.

[0032] A trigger lever 14 is disposed on the grip portion 21. The trigger lever 14 is operated by an operator to start the motor 8. By operating the trigger lever 14, the motor 8 is switched between being driven and being stopped.

[0033] The front housing 4 is disposed in front of the rear housing 2. The front housing 4 is cylindrical. The rear end of the front housing 4 is fixed to the front end of the rear housing 2. The front housing 4 includes a gear case 19. The front housing 4 houses a reciprocating motion converting mechanism 10 and a slider 11. The front housing 4 is covered with a cover 3. The cover 3 is made of rubber and is insulating.

[0034] The battery attachment section 5 is disposed at the rear of the battery holding section 23. The battery pack 13 is attached to the battery attachment section 5. The battery pack 13 functions as a DC power source for the reciprocating saw 1. The battery pack 13 is detachable from the battery attachment section 5. The battery pack 13 is attached to the battery attachment section 5 by inserting it downward from the top of the battery attachment section 5. The battery pack 13 is removed from the battery attachment section 5 by removing it upward from the battery attachment section 5.

[0035] The battery pack 13 includes a secondary battery. In this embodiment, the battery pack 13 includes a rechargeable lithium-ion battery. When attached to the battery attachment portion 5, the battery pack 13 can supply power to the reciprocating saw 1. The motor 8 is driven based on the power supplied from the battery pack 13.

[0036] The controller 7 controls at least the motor 8. The controller 7 has a circuit board and a plurality of electronic components mounted on the circuit board. Examples of the electronic components include a microcomputer and switching elements. The controller 7 is accommodated in the rear housing 2.

[0037] The motor 8 is the power source of the reciprocating saw 1. The motor 8 is an electric motor. The motor 8 is an inner rotor type brushless motor. The motor 8 has a stator 15, a rotor 16, and a rotor shaft 17. The stator 15 is disposed around the rotor 16. The rotor shaft 17 is fixed to the rotor 16. The rotor 16 and the rotor shaft 17 rotate relative to the stator 15. The rotor 16 and the rotor shaft 17 rotate around a rotation axis AX. The rotation axis AX extends in the front-to-rear direction.

[0038] The stator 15 has a cylindrical stator core, an insulator fixed to the stator core, and a plurality of coils wound around the teeth of the stator core via the insulator. The rotor 16 has a cylindrical rotor core and a permanent magnet fixed to the rotor core. The rotor shaft 17 is disposed inside the rotor core and fixed to the rotor core. The rotor core and the rotor shaft 17 may be integral.

[0039] At least a portion of the motor 8 is housed in a motor case 18. The motor case 18 is housed in the rear housing 2. The stator 15 is disposed inside the motor case 18. The stator 15 is fixed to the motor case 18. A gear case 19 of the front housing 4 is disposed in front of the motor case 18. The reciprocating motion converting mechanism 10 is housed in the gear case 19.

[0040] The rear end of rotor shaft 17 is rotatably supported by bearing 20A. The front end of rotor shaft 17 is rotatably supported by bearing 20B. Bearing 20A is held by motor case 18. Bearing 20B is held by gear case 19.

[0041] The fan 9 is fixed to the front of the rotor shaft 17. When the rotor shaft 17 rotates, the fan 9 rotates. The rotation of the fan 9 generates an air flow around the motor 8. The motor 8 is cooled by the air flow generated by the rotation of the fan 9.

[0042] An air intake port 33 is provided at the bottom of the accommodation portion 22. An exhaust port 60 is provided in the cover 3. Air that has passed around the motor 8 is discharged to the outside of the front housing 4 through the exhaust port 60. In this embodiment, the air intake port 33 is covered with a filter unit 34. The filter unit 34 has a filter 34A and a filter holder 34B that holds the filter 34A. The filter holder 34B is attached to the bottom of the accommodation portion 22. Air around the rear housing 2 flows into the interior of the rear housing 2 through the air intake port 33 in which the filter 34A is arranged, thereby preventing foreign matter around the rear housing 2 from entering the interior of the rear housing 2 through the air intake port 33.

[0043] A pinion gear 26A is provided at the front end of the rotor shaft 17. The pinion gear 26A is disposed inside the gear case 19. The rotor shaft 17 is coupled to the reciprocating motion converting mechanism 10 via the pinion gear 26A.

[0044] The reciprocating motion converting mechanism 10 converts the rotational motion of the rotor shaft 17 into reciprocating motion in the front-to-rear direction. The reciprocating motion converting mechanism 10 is disposed in front of the motor 8. The reciprocating motion converting mechanism 10 reciprocates a slider 11 in the front-to-rear direction based on the rotational force of the motor 8. The slider 11 is disposed in front of the motor 8. A blade 200 (see Figure 19), which is a type of tool tip, is fixed to the slider 11. The reciprocating motion of the slider 11 in the front-to-rear direction causes the blade 200 to reciprocate in the front-to-rear direction.

[0045] The reciprocating motion converting mechanism 10 includes a bevel gear 26B to which a pinion gear 26A is coupled, a support shaft 27 to which the bevel gear 26B is fixed, and an eccentric pin 28 provided at an eccentric position on the bevel gear 26B. The support shaft 27 is rotatably supported by bearings 29A and 29B. A slider block 11A is provided on the slider 11. At least a portion of the eccentric pin 28 is disposed inside the slider block 11A. The bevel gear 26B rotates about a rotation axis BX perpendicular to the rotation axis AX. As the bevel gear 26B rotates, the eccentric pin 28 revolves around the rotation axis BX, causing the eccentric pin 28 to move left and right inside the slider block 11A. As the eccentric pin 28 revolves around the rotation axis BX and moves left and right inside the slider block 11A, the slider 11 reciprocates forward and backward.

[0046] The slider 11 reciprocates in the front-to-rear direction due to the rotational force of the motor 8 transmitted via the reciprocating motion converting mechanism 10. The slider 11 is guided in the front-to-rear direction by slider guides 31 and 32. The slider 11 has a screw hole 11B and an opening 11C for fixing the blade 200. The screw hole 11B and the opening 11C are provided at the front end of the slider 11. The opening 11C is provided in front of the screw hole 11B. The slider 11 functions as a tool holder to which a tool bit is attached.

[0047] The shoe 12 is disposed at the front end of the front housing 4. The shoe 12 is attached to the front housing 4.

[0048] <Vice> Fig. 8 is a perspective view of the vise 40 according to the first embodiment, seen from the front. Fig. 9 is a perspective view of the vise 40 according to the first embodiment, seen from the rear. Fig. 10 is a view of the vise 40 according to the first embodiment, seen from the right side.

[0049] The vise 40 is attached to the vise attachment portion 6. The vise 40 is fixed to the workpiece. In this embodiment, the vise 40 is a chain vise. The vise 40 includes a vise base 41 that contacts the workpiece, a chain 42 that is supported by the vise base 41 and wound around the workpiece, a fastener 43 that is connected to the chain 42 and is operated to pull the chain 42 wound around the workpiece, an attachment rod 44 that is attached to the vise attachment portion 6, an elastic member 45 that is attached to the vise base 41, a support plate 46 that supports the elastic member 45, and screws 47 that fix the elastic member 45 and the support plate 46 to the vise base 41.

[0050] The vise mounting portion 6 is disposed forward of the motor 8. The vise mounting portion 6 is disposed forward of the reciprocating motion converting mechanism 10. The vise mounting portion 6 includes a hole provided in the front end portion of the front housing 4. The mounting rod 44 includes a rod-shaped member that is inserted into the hole of the vise mounting portion 6.

[0051] The vise 40 is detachably attached to the vise mounting portion 6. In this embodiment, the vise base 41 is disposed on the left side of the front housing 4. The vise 40 is attached to the vise mounting portion 6 by inserting the attachment rod 44 into the vise mounting portion 6 from the left side to the right side of the vise mounting portion 6. The vise 40 is detached from the vise mounting portion 6 by removing the attachment rod 44 from the vise mounting portion 6 to the left.

[0052] The vise base 41 may be disposed on the right side of the front housing 4. The vise 40 may be attached to the vise mounting portion 6 by inserting the attachment rod 44 into the vise mounting portion 6 from the right side toward the left side of the vise mounting portion 6. The vise 40 may be removed from the vise mounting portion 6 by removing the attachment rod 44 from the vise mounting portion 6 toward the right side.

[0053] The fastening tool 43 is operated to fasten the chain 42 wound around the workpiece to the workpiece. When cutting the workpiece, the operator brings the vise base 41 into contact with the workpiece and winds the chain 42 around the workpiece. After the chain 42 has been wound around the pipe, the operator operates the fastening tool 43 to fasten the chain 42 to the workpiece. This fixes the vise 40 to the workpiece.

[0054] FIG. 11 is a cross-sectional view showing the vise 40 according to the first embodiment. FIG. 12 is a cross-sectional view showing a portion of the vise 40 according to the first embodiment. FIG. 13 is a perspective view from the rear showing a portion of the vise 40 according to the first embodiment. FIG. 14 is a perspective view from the rear showing a portion of the chain 42 before being attached to the vise base 41 according to the first embodiment. FIG. 15 is an exploded perspective view from the rear showing a portion of the vise 40 according to the first embodiment. FIG. 16 is a view of a portion of the vise 40 according to the first embodiment as seen from above. FIG. 17 is a perspective view from the rear showing the elastic member 45 according to the first embodiment.

[0055] The fastener 43 has a lever 43A, a rod 43B, a hinge portion 43C, a ball 43D, and a coil spring 43E. The lever 43A is connected to the rod 43B via the hinge portion 43C. The rod 43B is threadedly connected to the mounting rod 44 and is rotatably supported on the vise base 41. An operator can turn the lever 43A. When the lever 43A is turned, the rod 43B rotates relative to the mounting rod 44. When the rod 43B rotates, it moves axially relative to the mounting rod 44. The ball 43D can fit into a recess provided on the surface of the rod 43B. The coil spring 43E is disposed inside the lever 43A. The coil spring 43E generates an elastic force that presses the ball 43D against the rod 43B.

[0056] The vise 40 has a holding member 48 that holds one end of the chain 42. The holding member 48 is disposed in the internal space of the vise base 41. The holding member 48 is connected to the lower end of the rod 43B. A groove 43F is provided in the lower end of the rod 43B. A portion of the holding member 48 is disposed inside the groove 43F, thereby connecting the holding member 48 to the lower end of the rod 43B.

[0057] The retaining member 48 has a peripheral wall portion 48A, a hook portion 48B, a notch portion 48C, and a hole 48D. The peripheral wall portion 48A surrounds one end of the chain 42. The hook portion 48B is connected to the upper end of the peripheral wall portion 48A. The hook portion 48B is positioned inside the groove portion 43F. The notch portion 48C is cut out upward from the lower end of the peripheral wall portion 48A. The chain 42 can fit inside the notch portion 48C. The notch portion 48C prevents the movement of the chain 42 from being hindered by the retaining member 48. A pin at one end of the chain 42 is inserted into the hole 48D. By inserting the pin at one end of the chain 42 into the hole 48D, one end of the chain 42 is retained by the retaining member 48.

[0058] The vise base 41 has an insertion space 41M into which a portion of the chain 42 is inserted. The vise base 41 has a left wall portion 41L and a right wall portion 41R facing the left wall portion 41L with a gap between them. The left wall portion 41L and the right wall portion 41R are each provided at the rear of the vise base 41. The right wall portion 41R is located to the right of the left wall portion 41L. The insertion space 41M is provided between the left wall portion 41L and the right wall portion 41R.

[0059] When winding the chain 42 around a workpiece, one end of the chain 42 is held by the holding member 48, and the pin 42A at the middle of the chain 42 is inserted into the insertion space 41M. The insertion space 41M is provided with a recess 41A into which the pin 42A is hooked. A pair of recesses 41A are provided. One recess 41A is provided in the lower part of the left wall portion 41L. The other recess 41A is provided in the lower part of the right wall portion 41R. The left end of the pin 42A inserted into the insertion space 41M is hooked into the left recess 41A. The right end of the pin 42A inserted into the insertion space 41M is hooked into the right recess 41A. With the left and right ends of the pin 42A hooked into the pair of recesses 41A, the lever 43A is turned, and the chain 42 is pulled by the holding member 48, and the workpiece is fastened by the chain 42. The workpiece is fastened by the chain 42, thereby fixing the vise 40 to the workpiece.

[0060] A pair of elastic members 45 are provided. The pair of elastic members 45 are attached to the vise base 41. The pair of elastic members 45 are arranged in the insertion opening 41N of the insertion space 41M. The insertion opening 41N of the insertion space 41M is provided at the upper end of the insertion space 41M. At least a portion of the pair of elastic members 45 is arranged at the upper end of the insertion space 41M.

[0061] One elastic member 45 is supported by the left wall portion 41L, and the other elastic member 45 is supported by the right wall portion 41R.

[0062] 17, the elastic member 45 has a first portion 451 that is long in the vertical direction, a second portion 452 that is shorter in the vertical direction than the first portion 451, and a folded portion 453 that connects the upper end of the first portion 451 and the upper end of the second portion 452.

[0063] The first portion 451 is fixed to the vise base 41. The second portion 452 is disposed at a position closer to the center of the insertion space 41M than the first portion 451. The second portion 452 is disposed at a position closer to the chain 42 than the first portion 451. In the left elastic member 45, the second portion 452 is disposed to the right of the first portion 451. In the right elastic member 45, the second portion 452 is disposed to the left of the first portion 451.

[0064] The center of the second portion 452 in the up-down direction protrudes toward the center of the insertion space 41M. The center of the second portion 452 protrudes toward the chain 42. The center of the second portion 452 of the left elastic member 45 protrudes toward the right. The center of the second portion 452 of the right elastic member 45 protrudes toward the left.

[0065] The support plate 46 supports the first portion 451 from outside the insertion space 41M. In the vertical direction, the length of the support plate 46 is shorter than the length of the first portion 451. The upper end of the support plate 46 is located below the folded-back portion 453.

[0066] The left support plate 46 is disposed so as to contact the left surface of the first portion 451 of the left elastic member 45. The right support plate 46 is disposed so as to contact the right surface of the first portion 451 of the right elastic member 45.

[0067] The screws 47 secure the support plate 46 and the first portion 451 to the vise base 41. An opening 46A is provided in the lower part of the support plate 46. An opening 45A is provided in the lower part of the first portion 451. The screws 47 are inserted into the openings 46A and 45A and then coupled to the screw holes 41B provided in the vise base 41. The left support plate 46 and the left elastic member 45 are secured to the left surface of the left wall portion 41L by the left screw 47. The right support plate 46 and the right elastic member 45 are secured to the right surface of the right wall portion 41R by the right screw 47.

[0068] The second portion 452 is disposed above the recessed portion 41A. The second portion 452 is disposed so as to cover the recessed portion 41A. The second portion 452 of the left elastic member 45 is disposed so as to cover the left recessed portion 41A. The second portion 452 of the right elastic member 45 is disposed so as to cover the right recessed portion 41A.

[0069] The distance Lm between the pair of elastic members 45 is shorter than the length Lp of the pin 42A that is hooked into the recess 41A. As shown in Fig. 14, the length Lp of the pin 42A is the dimension of the pin 42A in the left-right direction. In the left-right direction, the distance Lm between the left elastic member 45 and the right elastic member 45 is shorter than the length Lp of the pin 42A.

[0070] 16, the distance Lm between the pair of elastic members 45 is the distance between the pair of second portions 452. The distance Lm between the pair of elastic members 45 is the distance between the second portion 452 of the left elastic member 45 and the second portion 452 of the right elastic member 45. The distance Lm between the pair of second portions 452 is shorter than the length Lp of the pin 42A hooked into the recess 41A.

[0071] 18 is a right-side view of a portion of the chain 42 immediately before being inserted into the insertion space 41M according to the first embodiment. The pin 42A in the middle of the chain 42 is inserted into the insertion space 41M from above the insertion space 41M.

[0072] When the pin 42A of the chain 42 is inserted into the insertion space 41M to be hooked into the recess 41A, the pin 42A passes between the pair of second portions 452 arranged at the insertion opening 41N of the insertion space 41M. Because the distance Lm between the pair of second portions 452 is shorter than the length Lp of the pin 42A of the chain 42, when the pin 42A passes between the pair of second portions 452, the pair of elastic members 45 elastically deform so that the pair of second portions 452 are separated from each other. Because the pair of elastic members 45 elastically deform so that the pair of second portions 452 are separated from each other, the pin 42A is smoothly inserted into the insertion space 41M.

[0073] After the pin 42A is inserted into the insertion space 41M and hooked into the recessed portion 41A, the pair of elastic members 45 restore their positions so that the pair of second portions 452 approach each other. Because the distance Lm between the second portions 452 of the pair of elastic members 45 is shorter than the length Lp of the pin 42A of the chain 42, the pin 42A after hooked into the recessed portion 41A is covered by the second portions 452. Because the pin 42A is covered by the second portions 452, the pin 42A after hooked into the recessed portion 41A is prevented from falling out of the vise base 41. In other words, because the pin 42A is covered by the second portions 452, the pin 42A hooked into the recessed portion 41A is prevented from falling out. Because the pin 42A is covered by the second portions 452, even if the pin 42A tries to escape from the insertion space 41M, the pin 42A is caught by the second portions 452, and therefore the pin 42A is prevented from escaping from the insertion space 41M. Since the pin 42A of the chain 42 is prevented from falling off the vise base 41, a decrease in workability when fixing the vise 40 to the workpiece is prevented.

[0074] The second portion 452 functions as a countersink, which effectively prevents the pin 42A from falling off the vise base 41 after being hooked into the recess 41A.

[0075] When removing the pin 42A from the vise base 41, the pin 42A is pulled out from the insertion space 41M in a state in which the pair of elastic members 45 are elastically deformed so that the pair of second portions 452 are separated from each other. The operation of the lever 43A when removing the pin 42A from the vise base 41 can be minimized. Similarly, the operation amount of the lever 43A when attaching the pin 42A to the vise base 41 can also be minimized.

[0076] <Shoo> Fig. 19 is a perspective view showing the front part of the reciprocating saw 1 according to the first embodiment. Fig. 20 is a perspective view showing the fixing structure between the slider 11 and the blade 200 according to the first embodiment. Fig. 21 is a view of the front part of the reciprocating saw 1 according to the first embodiment as seen from below.

[0077] The shoe 12 is disposed at the front end of the front housing 4. The shoe 12 has a blade opening 12C in which the blade 200 is disposed. The shoe 12 is attached to the front housing 4 so as to cover an opening 4C (see FIGS. 22 and 23) provided on the front surface of the front housing 4.

[0078] The shoe 12 has a front plate portion 12A facing the front surface of the front housing 4, and a lower plate portion 12B facing the front portion of the lower surface of the front housing 4. The blade opening 12C is provided in the front plate portion 12A.

[0079] The shoe 12 is fixed to the front housing 4 with a screw 50. An elongated hole 12D is formed in the lower plate portion 12B. The screw 50 is inserted into the elongated hole 12D. A threaded hole 4B is formed in the underside of the front housing 4. The screw 50 is engaged with the threaded hole 4B formed in the underside of the front housing 4 via the elongated hole 12D. With the front plate portion 12A close to or in contact with the front surface of the front housing 4, the screw 50 is engaged with the threaded hole 4B via the elongated hole 12D, thereby fixing the shoe 12 to the front housing 4.

[0080] 21, the elongated hole 12D is provided on the left side of the center of the lower plate portion 12B in the left-right direction.

[0081] When the shoe 12 is fixed to the front housing 4 by the screw 50 with the front plate portion 12A approaching or in contact with the front surface of the front housing 4, the screw 50 is disposed in front of the elongated hole 12D rather than the center of the elongated hole 12D. The screw 50 may come into contact with the front end of the inner surface of the elongated hole 12D.

[0082] 19 and 20, the slider 11 and the blade 200 are fixed via a blade clamp 51. The rear end of the blade 200 is sandwiched between the front end of the slider 11 and the blade clamp 51. The slider 11, the blade 200, and the blade clamp 51 are fixed together with a screw 52. The screw 52 is inserted into a screw hole 11B (see FIG. 6) of the slider 11 through an opening provided in the blade clamp 51 and an opening provided in the rear end of the blade 200. The blade clamp 51 also has a pin portion 51A that is inserted into an opening 11C (see FIG. 6) of the slider 11.

[0083] An opening 4A is provided in the right part of the front part of the front housing 4. The head of the screw 52 is disposed on the right side of the blade clamp 51. The head of the screw 52 faces the opening 4A. An operator can insert a tool into a drive portion (hole) provided in the head of the screw 52 through the opening 4A to rotate the screw 52. In other words, the operator can tighten or loosen the screw 52 by rotating the screw 52 through the opening 4A.

[0084] In this embodiment, the reciprocating saw 1 has a tool holder 36 that holds a tool 35 for rotating the screws 50 and 52. As shown in FIG. 5, the tool holder 36 is provided at the bottom of the connecting portion 24. The tool holder 36 has a first holder portion 36A that holds a portion of the tool 35 and a second holder portion 36B that holds another portion of the tool 35. The second holder portion 36B is disposed in front of the first holder portion 36A.

[0085] <How to replace the blade clamp> 22 and 23 are diagrams illustrating a method for replacing the blade clamp 51 according to the first embodiment. For example, if the blade clamp 51 is damaged, in order to replace the blade clamp 51, an operator loosens the screw 52 through the opening 4A to release the blade clamp 51 from being fixed by the screw 52. After the screw 52 is removed from the blade clamp 51, the blade clamp 51 is carried out to the outside of the front housing 4 through an opening 4C provided in the front surface of the front housing 4.

[0086] In the embodiment, while the shoe 12 is attached to the front housing 4, it can be retracted from the front surface of the front housing 4 so that the opening 4C is exposed. The shoe 12 is rotatably attached to the front housing 4. The shoe 12 can be retracted from the front surface of the front housing 4 by rotating.

[0087] 22, when the blade clamp 51 is to be carried out of the front housing 4, the worker loosens the screw 50. Although the screw 50 is loosened, it is not removed from the screw hole 4B. Although the screw 50 is loosened, the screw 50 remains inserted in the elongated hole 12D and the screw hole 4B.

[0088] By loosening the screw 50, the shoe 12 can be moved forward so as to move away from the front surface of the front housing 4. By loosening the screw 50, the operator can move the shoe 12 forward so that the front plate portion 12A moves away from the front surface of the front housing 4. With the screw 50 inserted into the elongated hole 12D and the screw hole 4B, the shoe 12 is moved forward so as to move away from the front surface of the front housing 4. Because the screw 50 is disposed in the elongated hole 12D, the shoe 12 moves forward while being guided by the screw 50.

[0089] As the shoe 12 moves forward, the screw 50 is positioned at the rear of the elongated hole 12D rather than at the center of the elongated hole 12D. The screw 50 may come into contact with the rear end of the inner surface of the elongated hole 12D.

[0090] The shoe 12 is rotatably attached to the front housing 4 by a screw 50 so that it can change from facing the front surface of the front housing 4 to facing the left surface of the front housing 4. As shown in FIG. 23 , the shoe 12 moves forward so as to move away from the front surface of the front housing 4, and then is rotated to the left around the screw 50. The shoe 12 is rotated so that the front plate portion 12A faces the left surface of the front housing 4. By rotating around the screw 50, the shoe 12 can be retracted from the front surface of the front housing 4.

[0091] In this embodiment, the elongated hole 12D is provided to the left of the center of the lower plate portion 12B. Therefore, the operator can smoothly rotate the shoe 12 so that the front plate portion 12A faces the left surface of the front housing 4.

[0092] When the shoe 12 is rotated about the screw 50, the front plate portion 12A changes from facing the front surface of the front housing 4 to facing the side surface of the front housing 4. As shown in FIG. 23 , when the shoe 12 retracts from the front surface of the front housing 4, an opening 4C in the front housing 4 is exposed. An operator can carry the blade clamp 51 out of the front housing 4 through the opening 4C.

[0093] <Reciprocating saw operation> After the vise 40 is secured to the workpiece, the operator operates the trigger lever 14. Operating the trigger lever 14 drives the motor 8 with power supplied from the battery pack 13. When the rotor 16 rotates about the rotation axis AX, the pinion gear 26A provided at the front end of the rotor shaft 17 rotates. When the pinion gear 26A rotates, the bevel gear 26B coupled to the pinion gear 26A rotates. When the bevel gear 26B rotates, the eccentric pin 28 moves eccentrically with respect to the rotation axis BX of the bevel gear 26B, causing the slider 11 to reciprocate back and forth. When the slider 11 reciprocates back and forth, the blade 200 fixed to the slider 11 also reciprocates back and forth. While the blade 200 is reciprocating back and forth, the operator grasps the grip portion 21 and rotates the reciprocating saw 1 about the mounting rod 44. The operator holds the grip portion 21 and rotates the reciprocating saw 1 around the mounting rod 44 so that the grip portion 21 moves upward and the blade 200 moves downward. As a result, the reciprocating blade 200 is pushed into the workpiece, cutting the workpiece.

[0094] <Effects> As described above, in the embodiment, the reciprocating saw 1 includes the motor 8, the slider 11 that is disposed forward of the motor 8 and to which the blade 200 is fixed, the reciprocating motion converting mechanism 10 that reciprocates the slider 11 in the front-rear direction based on the rotational force of the motor 8, the front housing 4 that accommodates the slider 11, and the shoe 12 that has the blade opening 12C in which the blade 200 is disposed and is attached to the front housing 4 so as to cover the opening 4C provided in the front surface of the front housing 4. When attached to the front housing 4, the shoe 12 retracts from the front surface of the front housing 4 so as to expose the opening 4C.

[0095] In the above configuration, the shoe 12, while attached to the front housing 4, retreats from the front surface of the front housing 4 so as to expose the opening 4C. Since the opening 4C can be exposed without completely separating the shoe 12 from the front housing 4, the opening 4C can be exposed with good workability.

[0096] In the embodiment, the reciprocating saw 1 includes a motor 8, a slider 11 that is disposed forward of the motor 8 and to which a blade 200 is fixed, a reciprocating motion converting mechanism 10 that reciprocates the slider 11 in the front-to-rear direction based on the rotational force of the motor 8, a front housing 4 that accommodates the slider 11, and a shoe 12 that has a blade opening 12C in which the blade 200 is disposed and is attached to the front housing 4 so as to cover an opening 4C provided in the front surface of the front housing 4. The shoe 12 is rotatably attached to the front housing 4 and retracts from the front surface of the front housing 4 by rotating.

[0097] In the above configuration, the shoe 12 is retracted from the front surface of the front housing 4 by rotating, so that the opening 4C provided in the front surface of the front housing 4 is exposed with good workability.

[0098] In this embodiment, the shoe 12 moves forward so as to be separated from the front surface of the front housing 4, and then retracts from the front surface of the front housing 4 by rotating.

[0099] In the above configuration, the shoe 12 moves forward and then rotates smoothly.

[0100] In this embodiment, the shoe 12 is rotatably attached to the front housing 4 so that the shoe 12 can change from facing the front surface of the front housing 4 to facing the side surface of the front housing 4 .

[0101] In the above configuration, the opening 4C is exposed with good workability.

[0102] In this embodiment, the shoe 12 has a front plate portion 12A that faces the front surface of the front housing 4 and has a blade opening 12C, and a lower plate portion 12B that faces the underside of the front housing 4 and has an elongated hole 12D that is long in the front-to-rear direction. The reciprocating saw 1 is provided with a screw 50 that is coupled to a screw hole 4B provided in the underside of the front housing 4 via the elongated hole 12D. With the screw 50 inserted in the screw hole 4B, the shoe 12 moves forward to move away from the front end of the front housing 4, and then rotates so that the front plate portion 12A faces the side surface of the front housing 4.

[0103] In the above configuration, when the shoe 12 moves forward, the shoe 12 is guided by the screw 50. When the shoe 12 rotates, the shoe 12 can rotate around the screw 50.

[0104] In the embodiment, the elongated hole 12D is provided on the left side of the center of the lower plate portion 12B in the left-right direction. The shoe 12 rotates so as to face the left side of the left and right side surfaces of the front housing 4.

[0105] In the above configuration, the shoe 12 moves forward and then rotates smoothly. The elongated hole 12D may be provided on the right side of the center of the lower plate portion 12B in the left-right direction. The shoe 12 may rotate to face the right side of the left and right side surfaces of the front housing 4.

[0106] [Second embodiment] A second embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment will be denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0107] 24, 25, 26, and 27 are cross-sectional views illustrating a method for fixing the vise 40 according to the second embodiment to a workpiece 100. The workpiece is a pipe such as a steel pipe.

[0108] As shown in Fig. 24, one end of chain 42 is held by holding member 48. As shown in Fig. 24, coil spring 49, which is an elastic member, is arranged around rod 43B. When cutting workpiece 100, the operator brings vise base 41 into contact with a part of workpiece 100 and wraps chain 42 around workpiece 100. The operator places pin 42A, which is to be hooked into recess 41A, against the rear surface of vise base 41.

[0109] 25, the worker manually pulls the middle portion of the chain 42 upward, and then moves the pin 42A forward so that the pin 42A is inserted into the insertion space 41M. As the middle portion of the chain 42 is pulled upward, the holding member 48 moves downward. As the holding member 48 moves downward, the coil spring 49 compresses.

[0110] As shown in Figure 26, the worker inserts pin 42A into insertion space 41M and hooks it into recess 41A. Coil spring 49 generates an elastic force that pulls chain 42. When pin 42A is hooked into recess 41A, the middle portion of chain 42 moves slightly downward, and therefore holding member 48 moves upward due to the restoring force (elastic force) of coil spring 49. The elastic force of coil spring 49 presses pin 42A hooked into recess 41A against the inner surface of recess 41A.

[0111] As shown in FIG. 27 , after the pin 42A is hooked into the recess 41A, the operator turns the lever 43A so that the workpiece 100 is clamped by the chain 42. The operator turns the lever 43A so that the holding member 48 moves upward. As the lever 43A is turned, the rod 43B rotates. A screw thread is formed on the outer circumferential surface of the rod 43B, and a screw groove that engages with the screw thread of the rod 43B is provided in the mounting rod 44. As the rod 43B rotates, the rod 43B moves upward. As the rod 43B moves upward, the holding member 48 moves upward. As the holding member 48 moves upward, one end of the chain 42 is pulled upward, and the workpiece 100 is clamped by the chain 42. As the workpiece is clamped by the chain 42, the vise 40 is fixed to the workpiece 100.

[0112] As described above, in the embodiment, fastener 43 has rod 43B connected to lever 43A via a hinge portion, and retaining member 48 connected to the lower end of rod 43B and holding one end of chain 42 wound around the workpiece. Coil spring 49 is disposed around rod 43B. Coil spring 49 is disposed inside retaining member 48 and contacts retaining member 48. Coil spring 49 generates an elastic force such that pin 42A hooked in recess 41A is pressed against the inner surface of recess 41A.

[0113] In the above configuration, the chain 42 is pulled by the coil spring 49 so that the pin 42A is pressed against the inner surface of the recess 41A, which prevents the pin 42A from falling off the vise base 41 after it has been hooked into the recess 41A. Since the pin 42A of the chain 42 is prevented from falling off the vise base 41, a decrease in workability when fixing the vise 40 to the workpiece is prevented. Furthermore, since the chain 42 is pulled by the coil spring 49 so as to fasten the workpiece after the pin 42A is hooked into the recess 41A, the chain 42 is prevented from loosening.

[0114] In this embodiment, the lever 43A is rotated so that the workpiece is fastened by the chain 42 while the pin 42A is hooked in the recess 41A.

[0115] In the above configuration, the chain 42 is fixed to the workpiece by the elastic force of the coil spring 49, so the operator can tighten the workpiece with the chain 42 by simply turning the lever 43A slightly. In other words, the amount of operation of the lever 43A by the operator is reduced.

[0116] [Third embodiment] A third embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of these components will be simplified or omitted.

[0117] FIG. 28 is a diagram schematically illustrating a portion of a vise 140 according to a third embodiment. In the above-described embodiment, the distance Lm between the pair of elastic members 45 is the distance between the second portion 452 of the left elastic member 45 and the second portion 452 of the right elastic member 45. As shown in FIG. 28, a gate member 70 including an elastic member 45 and a claw member 71 may be attached to the vise base 41. The claw member 71 is attached to the tip of the elastic member 45. At least a portion of the gate member 70 is elastically deformable. The pair of gate members 70 are disposed in the insertion opening 41N of the insertion space 41M. The distance Lt between the pair of gate members 70 is shorter than the length Lp of the pin 42A. The distance Lt is the distance between the claw member 71 attached to the left elastic member 45 and the claw member 71 attached to the right elastic member 45. [Explanation of symbols]

[0118] 1...Reciprocating saw, 2...Rear housing, 2L...Left housing, 2R...Right housing, 2S...Screw, 3...Cover, 4...Front housing, 4A...Opening, 4B...Screw hole, 4C...Opening, 5...Battery mounting section, 6...Vise mounting section, 7...Controller, 8...Motor, 9...Fan, 10...Reciprocating motion conversion mechanism, 11...Slider, 11A...Slider block, 11B...Screw hole, 11C...Opening, 12...Shoe, 12A...Front plate, 12B...Lower plate, 12C...Blade opening, 12D...Elongated hole, 13...Battery pack 14...trigger lever, 15...stator, 16...rotor, 17...rotor shaft, 18...motor case, 19...gear case, 20A...bearing, 20B...bearing, 21...grip portion, 22...accommodation portion, 23...battery holding portion, 24...connection portion, 25...guard portion, 26A...pinion gear, 26B...bevel gear, 27...support shaft, 28...eccentric pin, 29A...bearing, 29B...bearing, 31...slider guide, 32...slider guide, 33...intake port, 34...filter unit , 34A...filter, 34B...filter holder, 35...tool, 36...tool holder, 36A...first holder portion, 36B...second holder portion, 40...vise, 41...vise base, 41A...recess, 41B...screw hole, 41L...left wall portion, 41M...insertion space, 41N...insertion port, 41R...right wall portion, 42...chain, 42A...pin, 43...fastener, 43A...lever, 43B...rod, 43C...hinge portion, 43D...ball, 43E...coil spring, 43F...groove portion, 44...mounting rod, 45...elastic member, 45A...opening, 451...first part, 452...second part, 453...folded part, 46...support plate, 46A...opening, 47...screw, 48...retaining member, 48A...peripheral wall part, 48B...hook part, 48C...notch part, 48D...hole, 49...coil spring, 50...screw, 51...blade clamp, 51A...pin part, 52...screw, 60...exhaust port, 70...gate member, 71...jaw member, 100...workpiece, 140...vice, 200...blade, AX...rotation axis, BX...rotation axis, Lm...distance, Lp...length.

Claims

1. A motor; a slider disposed forward of the motor and to which a blade is fixed; a reciprocating motion conversion mechanism that reciprocates the slider in the forward and backward directions based on the rotational force of the motor; a housing that accommodates the slider; a shoe having a blade opening in which the blade is disposed, the shoe being attached to the housing so as to cover an opening provided in a front surface of the housing; the shoe, while attached to the housing, retreats from the front surface of the housing so as to expose the opening; Reciprocating saw.

2. A motor; a slider disposed forward of the motor and to which a blade is fixed; a reciprocating motion conversion mechanism that reciprocates the slider in the forward and backward directions based on the rotational force of the motor; a housing that accommodates the slider; a shoe having a blade opening in which the blade is disposed, the shoe being attached to the housing so as to cover an opening provided in a front surface of the housing; The shoe is rotatably attached to the housing and retracts from the front surface of the housing by rotating. Reciprocating saw.

3. the shoe moves forward so as to be separated from the front surface of the housing, and then rotates to retract from the front surface of the housing; The reciprocating saw according to claim 1 or 2.

4. The shoe is rotatably attached to the housing so as to change from a state facing the front surface of the housing to a state facing the side surface of the housing. The reciprocating saw of claim 3.

5. The shoe is a front plate portion facing the front surface of the housing and having the blade opening; a lower plate portion facing the lower surface of the housing and having a long hole extending in the front-rear direction, a screw that is coupled to a screw hole provided in the lower surface of the housing through the long hole; With the screw inserted into the screw hole, the shoe moves forward to move away from the front end of the housing, and then rotates so that the front plate portion faces the side surface of the housing.

5. The reciprocating saw of claim 4.

6. In the left-right direction, the long hole is provided on one side of the center of the lower plate portion, The shoe rotates to face one of the left and right side surfaces of the housing.

6. The reciprocating saw of claim 5.

Images