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CN-122007506-A - Reciprocating cutting tool

CN122007506ACN 122007506 ACN122007506 ACN 122007506ACN-122007506-A

Abstract

The invention provides a reciprocating cutting tool. A reciprocating cutting tool (1) has a saw blade attachment/detachment section (32) capable of reciprocating and detaching a saw blade (34), the saw blade attachment/detachment section having a 1 st pressing member (130), a 1 st pressing member (134), a2 nd pressing member (142), and a2 nd pressing member (144), the 1 st pressing member being movable in a direction toward or away from the saw blade (34) and being capable of pressing the saw blade (34), the 1 st pressing member being capable of pressing the 1 st pressing member (130), the 2 nd pressing member being capable of pressing the saw blade (34) in a direction different from a direction in which the 1 st pressing member (130) is pressed, the 2 nd pressing member being capable of pressing the 2 nd pressing member, the 1 st pressing member automatically pressing the saw blade when the 2 nd pressing member is pressed by the saw blade, the 1 st pressing member being disposed at a position avoiding a moving direction of the 1 st pressing member. Accordingly, the saw blade can be easily detached.

Inventors

  • Corporate corporation
  • Ogasawara's involvement

Assignees

  • 株式会社牧田

Dates

Publication Date
20260512
Application Date
20250819
Priority Date
20241111

Claims (11)

  1. 1. A reciprocating cutting tool (1), characterized in that, Has a blade attachment/detachment portion (32), the blade attachment/detachment portion (32) being reciprocatingly movable and having a detachable blade (34), The saw blade attaching/detaching portion (32) has a1 st pressing member (130), a1 st urging member (134), a 2 nd pressing member (142), and a 2 nd urging member (144), wherein, The 1 st pressing member (130) is movable in a direction approaching or separating from the saw blade (34), and is capable of pressing the saw blade (34); the 1 st force application member (134) applies force to the 1 st pressing member (130); The 2 nd pressing member (142) may press the saw blade (34) in a direction different from a direction in which the 1 st pressing member (130) presses; the 2 nd force application member (144) applies force to the 2 nd pressing member (142), When the 2 nd pressing member (142) is pressed by the saw blade (34), the 1 st pressing member (130) automatically presses the saw blade (34), The 1 st biasing member (134) is disposed at a position avoiding the movement direction of the 1 st pressing member (130).
  2. 2. Reciprocating cutting tool (1) according to claim 1, characterized in that, The 2 nd pressing member (142) is movable in a direction in which the saw blade attachment/detachment portion (32) reciprocates, The 1 st pressing member (130) moves in a direction orthogonal to the moving direction of the 2 nd pressing member (142), The 1 st urging member (134) is disposed at a position offset from the 1 st pressing member (130) in the direction in which the saw blade attachment/detachment portion (32) reciprocates.
  3. 3. Reciprocating cutting tool (1) according to claim 1 or 2, characterized in that, The 1 st force application component (134) is a torsion spring, The 2 nd pressing member (142) is disposed radially inward of the 1 st urging member (134).
  4. 4. A reciprocating cutting tool (1) as defined in any one of claims 1-3, wherein, The saw blade attaching/detaching portion (32) has a sleeve (132), the sleeve (132) is rotatable around a direction in which the saw blade attaching/detaching portion (32) reciprocates, The 1 st pressing member (130) and the 1 st urging member (134) are disposed radially inward of the sleeve (132).
  5. 5. Reciprocating cutting tool (1) according to claim 4, characterized in that, The sleeve (132) has a cam surface (132C) on an inner surface, The 1 st pressing member (130) moves with the rotation of the sleeve (132) by traveling along the cam surface (132C).
  6. 6. Reciprocating cutting tool (1) according to claim 4 or 5, characterized in that, The 2 nd pressing member (142) extends along the direction of the reciprocating movement of the saw blade dismounting portion (32), The 2 nd pressing member (142) has an engagement portion (142F), The sleeve (132) has an engaged portion (132G), The engagement portion (142F) is engaged with the engaged portion (132G) to prevent rotation of the sleeve (132).
  7. 7. Reciprocating cutting tool (1) according to claim 6, characterized in that, When the engaging portion (142F) engages with the engaged portion (132G), the sleeve (132) can move the 1 st pressing member (130) to a position where the saw blade (34) is not pressed, When the engagement between the engagement portion (142F) and the engaged portion (132G) is released, the sleeve (132) moves the 1 st pressing member (130) to a position where the saw blade (34) is pressed.
  8. 8. Reciprocating cutting tool (1) according to claim 6 or 7, characterized in that, The 2 nd pressing member (142) has a pressing portion (142P) and a tongue portion (142T), wherein the tongue portion (142T) integrally connects the engaging portion (142F) and the pressing portion (142P), When the pressing portion (142P) is pressed by the saw blade (34), the engaging portion (142F) moves to be separated from the engaged portion (132G).
  9. 9. Reciprocating cutting tool (1) according to claim 8, characterized in that, The tongue portion (142T) and the pressing portion (142P) extend in the direction in which the blade attachment/detachment portion (32) reciprocates, The tongue portion (142T) is offset from the virtual center line of the pressing portion (142P) in a direction orthogonal to the direction in which the saw blade attachment/detachment portion (32) reciprocates.
  10. 10. A reciprocating cutting tool (1), characterized in that, Has a blade attachment/detachment portion (32), the blade attachment/detachment portion (32) being reciprocatingly movable and having a detachable blade (34), The saw blade attaching/detaching portion (32) has a sleeve (132), a1 st pressing member (130), a1 st urging member (134), a 2 nd pressing member (142), and a 2 nd urging member (144), wherein, The sleeve (132) can rotate around the direction of the reciprocating motion of the saw blade dismounting part (32) and is provided with an engaged part (132G); The 1 st pressing member (130) is disposed radially inward of the sleeve (132) and moves with rotation of the sleeve (132), and the 1 st pressing member (130) is movable in a direction approaching or separating from the saw blade (34) and is capable of pressing the saw blade (34); the 1 st urging member (134) is disposed radially inward of the sleeve (132) and urges the 1 st pressing member (130); The 2 nd pressing member (142) is capable of pressing the saw blade (34) in a direction in which the saw blade attachment/detachment portion (32) reciprocates; the 2 nd pressing member (142) has an engagement portion (142F), a pressing portion (142P), and a tongue portion (142T), wherein, The engagement portion (142F) is engaged with the engaged portion (132G) to prevent rotation of the sleeve (132); The pressing part (142P) extends along the reciprocating direction of the saw blade dismounting part (32); The tongue (142T) integrally connects the engagement portion (142F) and the pressing portion (142P) and extends in the direction in which the saw blade attachment/detachment portion (32) reciprocates, and the tongue (142T) is offset from the virtual center line of the pressing portion (142P) in a direction orthogonal to the direction in which the saw blade attachment/detachment portion (32) reciprocates; the 2 nd force application member (144) applies force to the 2 nd pressing member (142), When the pressing portion (142P) is pressed by the saw blade (34), the engaging portion (142F) moves to be separated from the engaged portion (132G).
  11. 11. The reciprocating cutting tool (1) according to any one of claims 1-10, wherein, A virtual center line in the extending direction of the saw blade (34) attached to the saw blade attachment/detachment section (32) is offset toward the 1 st pressing member (130) in a direction orthogonal to the direction in which the saw blade attachment/detachment section (32) reciprocates with respect to a virtual center line in the extending direction of the saw blade attachment/detachment section (32).

Description

Reciprocating cutting tool Technical Field The present invention relates to a reciprocating cutting tool such as a wire saw (jigsaw) and a reciprocating saw (reciprocating saw). Background There is known a wire saw disclosed in japanese patent laying-open No. 2002-254403 (patent document 1). The jigsaw 10 has a clamping device 26 for a saw blade (blade) 22. The clamping device 26 switches the saw blade 22 to the unlocked state and the locked state by rotating the sleeve 33. The sleeve 33 is biased in the rotational direction by a coil spring 44. In the locked state, the clamping device 26 clamps the saw blade 22 by the pin 42 pressed by the cam 33c of the sleeve 33 and the wall surface 37j of the slit 37a of the lever 37. The coil spring 44 is disposed radially outward of the pin 42 for pressing the saw blade 22. When the user is to attach and detach the saw blade 22, the user needs to handle the saw blade 22 while maintaining the open operation of the operation member 52 and maintaining the unlocked state by maintaining the rotational position of the sleeve 33. Further, a saw blade mounting device for a wire saw disclosed in japanese patent laying-open No. 2011-255449 (patent document 2) is known. The blade mounting apparatus 10 has a lever portion 11, a blade guide 12, a guide engagement member 20, a blade holder 13, and an operating member 14, and a torsion spring 18. The blade guide 12 has a cylindrical shape and is held at the lower end of the lever 11 by a guide support member 15 having a cylindrical shape. The guide engaging member 20 is disposed below the guide supporting member 15. The blade holder 13 and the operating member 14 are each cylindrical, and are assembled with the guide support member 15 and the guide engaging member 20 being housed on the inner peripheral side. The torsion spring 18 is sandwiched between the operating member 14 and the guide engaging member 20. The torsion spring 18 biases the operating member 14 in the rotational direction toward the blade attachment position side. The blade guide 12 is accommodated in an inner peripheral hole of the lever 11 so as to be movable in the axial direction. The blade guide 12 is pressed into the inside by the pressing operation of the blade B accommodated in the guide groove 12c of the blade guide 12. Then, the pair of rotation stopping edge portions 12a of the blade guide 12 are disengaged from the corresponding engagement groove portions 13f of the blade holder 13. The operating member 14 is automatically rotated toward the blade attachment position by the biasing force of the torsion spring 18. The saw blade B has a pair of engaging ears Bb. The engaging lug Bb is vertically held by a corresponding limit groove 20a of the guide engaging member 20 and a corresponding cam portion 13e of the blade holder 13 rotated to the blade mounting position side. Disclosure of Invention [ Problem to be solved by the invention ] In the clamping device 26 of patent document 1, the coil spring 44 is arranged radially outward of the pin 42 for pressing the saw blade 22. Thus, the clamping device 26 is enlarged in diameter. In this way, it is difficult for the user to visually confirm the vicinity of the saw blade 22 when performing work, corresponding to the degree of increase in diameter. In addition, in the clamping device 26, it is necessary to maintain the opening operation of the operating member 52 when the saw blade 22 is attached and detached, and thus the operation is troublesome. In the saw blade attachment device 10 of patent document 2, each engagement lug Bb of the saw blade B is held up and down. Therefore, each engagement ear Bb is easily worn. This causes a change in the installation angle of the saw blade B, thereby affecting workability. The invention aims to provide a reciprocating type cutting tool capable of easily dismounting a saw blade. [ Solution for solving the problems ] The invention according to claim 1 is a reciprocating cutting tool having a blade attaching/detaching portion that reciprocates and attaches/detaches a blade, The saw blade dismounting part is provided with a1 st pressing component, a1 st force application component, a2 nd pressing component and a2 nd force application component, wherein, The 1 st pressing member is movable in a direction approaching or separating from the saw blade, and is capable of pressing the saw blade; The 1 st force application member applies force to the 1 st pressing member; the 2 nd pressing member is capable of pressing the saw blade in a direction different from a direction in which the 1 st pressing member presses; the 2 nd force applying member applies force to the 2 nd pressing member, When the 2 nd pressing part is pressed by the saw blade, the 1 st pressing part automatically presses the saw blade, The 1 st urging member is disposed at a position avoiding the movement direction of the 1 st pressing member. The 2 nd aspect of the present invention is a reciprocating type cutting