Needle mounting device and sewing machine

Patent metadata

Field	Value
Publication number	US-10934648-B2
Application number	US-201916250277-A
Country	US
Kind code	B2
Filing date	Jan 17, 2019
Priority date	Jul 27, 2016
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

A needle mounting device mounts a punch needle for needle punching on a needle bar of a sewing machine. The needle mounting device includes an insertion portion, an engaging mechanism, and an affixing portion. The insertion portion has a bar shape and is configured to be inserted into a mounting portion provided in the needle bar for mounting a sewing needle. The engaging mechanism is able to engage with the needle bar at a different position from the insertion portion in an extension direction of the insertion portion. The affixing portion is configured to affix the punch needle.

First claim

What is claimed is:

1. A needle mounting device for mounting a punch needle for needle punching on a needle bar of a sewing machine, the needle mounting device comprising:
a base portion that includes a foundation portion and a body portion;
an insertion portion supported by the foundation portion, extending in an extension direction from the foundation portion, and configured to be inserted into a mounting portion provided in the needle bar for mounting a sewing needle;
a rotation axis that extends in the extension direction;
an engaging mechanism capable of engaging with the needle bar at a different position from the insertion portion in the extension direction,
the engaging mechanism including a U-shaped engaging portion along an outer surface of the needle bar,
the engaging mechanism being supported by the body portion so as to be rotatable about the rotation axis between an engaged position where the engaging portion is engaged with the needle bar and a disengaged position where the engaging portion is disengaged from the needle bar; and

an affixing portion configured to affix the punch needle.

2. The needle mounting device according to claim 1 , further comprising:
an engaging lever capable of rotating between a first position and a second position about a direction intersecting the extension direction, wherein
the engaging lever is configured to come into contact with the engaging mechanism and rotate the engaging mechanism about the rotation axis from the disengaged position toward the engaged position when the engaging lever rotates from the first position to the second position.

3. The needle mounting device according to claim 1 , further comprising:
an engaging lever capable of rotating between a first position and a second position about a direction that intersects the extension direction, wherein
the second position is such that the engaging lever comes in contact with the engaging mechanism and the engaging lever restricts the rotation of the engaging mechanism from the engaged position toward the disengaged position when the engaging mechanism is in the engaged position, and,
the first position is such that the engaging lever does not come in contact with the engaging mechanism and does not restrict the rotation of the engaging mechanism from the engaged position toward the disengaged position.

4. The needle mounting device according to claim 3 , wherein
the engaging lever includes a first protruding portion,
the engaging mechanism includes a first recessed portion, and
the first protruding portion is engaged with the first recessed portion when the engaging lever is in the second position.

5. The needle mounting device according to claim 3 , further comprising:
a cam configured to rotate in conjunction with a rotation of the engaging lever, wherein
the cam is configured to come into contact with the engaging mechanism and rotate the engaging mechanism from the engaged position toward the disengaged position when the engaging lever rotates from the second position to the first position.

6. The needle mounting device according to claim 5 , wherein
a face of the engaging mechanism adjoining a portion of the engaging mechanism configured to come into contact with the cam is oriented obliquely to an axis of rotation of the cam.

7. The needle mounting device according to claim 3 , further comprising:
a cam configured to rotate in conjunction with a rotation of the engaging lever, wherein
at least a portion of the foundation portion and a portion of the cam are disposed opposite one another in the extension direction when the engaging lever has moved to the second position.

8. The needle mounting device according to claim 3 , further comprising:
a restricting portion restricting the rotation of the engaging mechanism, wherein
the engaging mechanism is configured to rotate within a specified angle range, the specified angle range including the engaged position and the disengaged position, and
the restricting portion restricts the rotation of the engaging mechanism to within the specified angle range.

9. The needle mounting device according to claim 8 , wherein
the restricting portion includes
a second protruding portion provided on one of the engaging mechanism and the body portion, and
a second recessed portion provided on the one of the engaging mechanism and the body portion on which the second protruding portion is not provided and with which the second protruding portion engages.

10. The needle mounting device according to claim 3 , further comprising:
a cam configured to rotate in conjunction with a rotation of the engaging lever, wherein
the engaging mechanism is configured to rotate within a specified angle range, the specified angle range including the engaged position and the disengaged position,
the cam, in a state in which the engaging lever has moved to the first position, restricts a rotation of the engaging mechanism toward an engaged position side of the specified angle range, and
the engaging lever, in a state in which the engaging lever has moved to the second position, restricts a rotation of the engaging mechanism toward a disengaged position side of the specified angle range.

11. The needle mounting device according to claim 10 , further comprising:
a restricting portion restricting the rotation of the engaging mechanism to within the angle range, wherein
the restricting portion includes
a second protruding portion provided on one of the engaging mechanism and the body portion, and
a second recessed portion provided on the one of the engaging mechanism and the body portion on which the second protruding portion is not provided and with which the second protruding portion engages.

12. The needle mounting device according to claim 1 , further comprising:
an adjustment portion, wherein
the foundation portion includes a hole extending in the extension direction,
a part of the insertion portion is rotatably inserted in the hole about the extension direction,
the insertion portion includes, on a portion of a circumferential face of the insertion portion, a flat portion formed along a plane parallel to the extension direction, and
the adjustment portion adjusts an orientation of the flat portion in relation to the affixing portion by restricting the rotation of the insertion portion when the adjustment portion comes into contact with the insertion portion.

13. The needle mounting device according to claim 1 , wherein
the affixing portion is set apart from the insertion portion in an orthogonal direction orthogonal to the extension direction, and
at least a portion of the engaging mechanism is disposed on the opposite side of the insertion portion from the affixing portion in the orthogonal direction.

14. A sewing machine, comprising:
a needle bar; and
a needle mounting device for mounting a punch needle for needle punching on the needle bar, wherein
the needle mounting device includes
a base portion that includes a foundation portion and a body portion;
an insertion portion supported by the foundation portion, extending in an extension direction from the foundation portion, and configured to be inserted into a mounting portion provided in the needle bar for mounting a sewing needle;
a rotation axis that extends in the extension direction;
an engaging mechanism capable of engaging with the needle bar at a different position from the insertion portion in the extension direction,
the engaging mechanism including a U-shaped engaging portion along an outer surface of the needle bar,
the engaging mechanism being supported by the body

Assignees

• Brother Ind Ltd

Inventors

• Takahashi Hideyuki
• Yoshida Masaki
• Funato Nobuhiko

Classifications

• D05B55/02 Primary

  Devices for fastening needles to needle bars · CPC title