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US-12623325-B2 - Driving tool

US12623325B2US 12623325 B2US12623325 B2US 12623325B2US-12623325-B2

Abstract

A two-member joint structure driver of a driving tool includes a striker and an engagement member. A channel to guide the striker and a release channel for the engaging section of the engagement member to pass through are shifted in a thickness direction of the driver. The width of the guide channel is expanded, and wider striker can be used without expanding the release channel. The cost of the driver can be reduced by having the two-member joint structure.

Inventors

  • Kiyonobu Yoshikane
  • Junpei KAMIMOTO

Assignees

  • MAKITA CORPORATION

Dates

Publication Date
20260512
Application Date
20231117
Priority Date
20221202

Claims (18)

  1. 1 . A driving tool comprising: a piston configured to move due to gas pressure; a driver coupled to the piston, wherein the driver and the piston are movable together within a cylinder, wherein the driver includes a striker configured to strike a driven member, and an engagement member having a plurality of engaging sections along a moving direction of the driver, and wherein the engagement member joins the striker in a direction orthogonal to a longitudinal direction of the driver; and a lifter that engages with the plurality of engaging sections to return the driver to an initial position, and wherein the driving tool has at least one protrusion formed on one side of either the striker or the engagement member, and a corresponding at least one recess is formed on another side of the striker or the engagement member, and wherein the striker and the engagement member are joined via at least one of recess-protrusion fitting portion by inserting each of the at least one protrusion into each of the at least one recess.
  2. 2 . The driving tool according to claim 1 , wherein more than one of recess-protrusion fitting portions are formed in the longitudinal direction of the driver.
  3. 3 . The driving tool according to claim 1 , wherein the striker further has a contact portion configured to extend toward the engagement member and to contact an end of the engagement member in a driving direction.
  4. 4 . The driving tool according to claim 1 , wherein the striker includes a plurality of hook portions, that are aligned in the longitudinal direction of the driver, wherein the plurality of hook portions is configured to project to an opposite joining side of the engagement member to restrict the engagement member from being separated.
  5. 5 . The driving tool according to claim 3 , wherein the contact portion has a hook portion configured to project to an opposite joining side of the engagement member to restrict the engagement member from being separated from the striker.
  6. 6 . The driving tool according to claim 3 , wherein the contact portion has a relief recess formed at a base of the contact portion.
  7. 7 . The driving tool according to claim 1 , wherein the plurality of engaging sections includes a leading engaging section positioned at a leading end in the moving direction of the driver and a final engaging section positioned at a final end, wherein the engagement member has a first fitting portion configured to be fitted by the striker at a position corresponding to a part of the leading engaging section and a second fitting portion configured to be fitted by the striker at a position corresponding to a part of the final engaging section.
  8. 8 . The driving tool according to claim 1 , wherein the driving tool includes (i) a driving channel having guide walls configured to guide the striker and (ii) a release channel configured for one of the engaging sections of the engagement member to pass through, wherein the guide walls and the release channel are displaced in a thickness direction.
  9. 9 . A driving tool comprising: a piston configured to move due to gas pressure; a driver coupled to the piston, wherein the driver and the piston are movable together within a cylinder, wherein the driver includes a striker configured to strike a driven member and an engagement member having a plurality of engaging sections along a moving direction of the driver, and wherein the engagement member joins the striker in a direction orthogonal to a longitudinal direction of the driver; and a lifter that engages with the plurality of engaging sections to return the driver to an initial position, and wherein the striker includes a hook portion configured to project to an opposite joining side of the engagement member to restrict the engagement member from being separated.
  10. 10 . The driving tool according to claim 9 , wherein the driving tool includes a connecting portion configured for connecting the striker and the engagement member.
  11. 11 . The driving tool according to claim 10 , wherein the driving tool includes a guide portion configured to guide the connecting portion along a driving direction.
  12. 12 . The driving tool according to claim 9 , wherein the striker has a flat plate shape.
  13. 13 . The driving tool according to claim 9 , wherein the striker is located within a width of the engagement member.
  14. 14 . The driving tool according to claim 9 , wherein a minimum distance between the striker and an engaged portion is less than a width of the striker.
  15. 15 . The driving tool according to claim 9 , wherein a thickness of the engagement member is greater than a thickness of the striker.
  16. 16 . The driving tool according to claim 9 , wherein a center of thickness of the engagement member coincides with a center of the piston.
  17. 17 . The driving tool according to claim 9 , wherein the lifter further includes a first flange and a second flange, and the first and second flanges of the lifter are formed of one member.
  18. 18 . The driving tool according to claim 9 , wherein the striker and the engagement member are separate members and mutually joined.

Description

TECHNICAL FIELD The present invention relates to a driving tool for driving a driven member into a workpiece. BACKGROUND Japanese Patent No. 6485544 discloses a gas-spring type driving tool that utilizes compressed gas to strike a driven member. The gas-spring type driving tool has a piston configured to move up and down in a cylinder and a driver that is coupled to the piston and moves a striking channel to strike the driven member. The piston and driver move downward in the driving direction due to gas pressure in a storage chamber in the cylinder. The piston and the driver are returned in an anti-driving direction by a lift mechanism. The lift mechanism has a wheel that is sequentially engaged with a plurality of engagement portions provided on the driver. The wheel is rotated by an electric motor. After the driving operation, the wheel rotates and engages the engagement portions of the driver one after another, causing the driver to return to the anti-driving direction. As the piston is returned to the anti-driving direction, gas pressure within the storage chamber is increased. As the driver returns, a driven member is fed to the driving channel. The engagement of the lift mechanism to the driver is released near the moving end in the anti-driving direction. As a result, the driver is moved due to the gas pressure to perform the driving action on the driven member. According to the driving tool, a release channel for a plurality of engagement portions provided on the driver to pass through is formed in parallel with the driving channel for the driver to move. This may cause a problem where a driving nose increases in size when the release channel is formed in parallel with the wide driving channel that guides a wide driven member, such as a staple, for example. There has been a need for a driving tool that enables a wide driven member to be used without increasing the size of the driving nose. Solution to Problem According to one aspect of the present disclosure, a driving tool may include, for example, a piston that moves due to gas pressure and a driver provided with the piston that moves together with the piston to strike a driven member. The driving tool may include, for example, a plurality of engaging sections formed on the driver along a moving direction of the driver, and a lifter that successively engages with the plurality of engaging sections to return the driver to its initial position. The driver has a striker that strikes the driven member and an engagement member that includes the plurality of engaging sections and is joined to the striker in a direction orthogonal to the longitudinal direction of the driver. Therefore, the engagement member is joined to the striker and displaced in a direction orthogonal to the longitudinal direction of the driver. Therefore, a release channel for the plurality of engaging sections to pass through is displaced in the direction orthogonal to the longitudinal direction of the driver with respect to a driving channel of the driven member. This allows the driving channel to increase in width that enables a wide driven member, such as a staple, to be used without increasing the size of a driving nose. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an entire side view of a driving tool. FIG. 2 is a front view of a driving nose as viewed from the direction of an arrow II in FIG. 1. This view illustrates a driver in an upper standby position. FIG. 3 is a front view of the driving nose as viewed from the direction of the arrow II in FIG. 1. This view illustrates the driver in a downward motion end. FIG. 4 is a perspective view of the driver according to the first embodiment. FIG. 5 is a side view of the driver according to the first embodiment. FIG. 6 a cross-sectional view of a part of the driver according to the first embodiment. FIG. 7 is an exploded perspective view of the driver according to the first embodiment. FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 2, which is a cross-sectional view of a driving channel. FIG. 9 is a perspective view of the driver according to the first embodiment, showing a vertical sectional view of a lift mechanism. FIG. 10 is a vertical sectional view of a part of the driver and the lift mechanism according to the first embodiment. FIG. 11 is a lateral sectional view of the driver and the lift mechanism according to the first example. FIG. 12 is a perspective view of the driver according to the second example. FIG. 13 is a side view of the driver according to the second example. FIG. 14 is across-sectional view of a part of the driver according to the second example. DESCRIPTION OF EMBODIMENTS In another aspect of the present disclosure, the driving tool may have a protrusion formed on one of two members such as, for example, a striker and an engagement member, and a recess formed on the other one of the two members, into which the protrusion is fitted. Therefore, the striker and the engagement member are fir