Binding machine

Patent metadata

Field	Value
Publication number	US-11725405-B2
Application number	US-202117387110-A
Country	US
Kind code	B2
Filing date	Jul 28, 2021
Priority date	Jul 31, 2020
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A binding machine includes: a wire feeding unit configured to feed a wire; a curl guide configured to curl the wire fed in a forward direction by the wire feeding unit; and a binding unit configured to twist the wire fed in a reverse direction by the wire feeding unit and wound on an object. The binding unit includes a wire engaging body configured to engage a tip end-side of the wire fed in the forward direction by the wire feeding unit, curled by the curl guide and wound around the object. The binding machine includes a pulling unit for pulling, toward the object, a wire on a second side positioned on an opposite side to the curl guide with respect to the object earlier than a wire on a first side positioned on the curl guide of the wire wound around the object and engaged at its tip end.

First claim

What is claimed is:

1. A binding machine comprising:
a wire feeder configured to feed a wire;
a curl guide arranged along a loop feed path and configured to curl the wire that is fed in a forward direction by the wire feeder so that the wire is curled and feed along the loop feed path; and
a binding unit configured to twist the wire fed in a reverse direction by the wire feeder and wound on an object,
wherein the binding unit includes a wire engaging body, the wire engaging body including a clamp that engages a tip end-side of the wire fed in the forward direction by the wire feeder, curled by the curl guide and wound around the object,
wherein the wire is feed in a loop around the object, with the loop having a first side adjacent the curl guide and a second side on an opposite side of the loop than the first side, and wherein with the loop around the object, the object is between the first side of the loop and the second side of the loop, and
wherein the binding machine includes a pulling unit for pulling wire on the second side of the loop toward the object earlier than wire on the first side of the loop, and wherein the pulling unit pulls wire on the second side of the loop when the wire is engaged by the clamp and fed in the reverse direction by the wire feeder.

2. The binding machine according to claim 1 , further comprising an induction guide configured to guide the wire curled by the curl guide to the binding unit,
wherein the induction guide is arranged along the loop feed path on an opposite side of the loop feed path than the curl guide, with the object between the induction guide and the curl guide, and
wherein the pulling unit pulls the wire on the second side of the loop along the induction guide earlier than the wire on the first side of the loop along the curl guide.

3. The binding machine according to claim 1 , wherein the pulling unit is configured to keep the wire on the first side of the loop apart from the object while pulling the wire on the second side of the loop toward the object.

4. The binding machine according to claim 1 , wherein the pulling unit includes:
a guide member provided adjacent the curl guide, with the loop feed path extending between the guide member and the curl guide, the guide member movable between a guide position and a retreat position, the guide position being on a radially inner side of the loop feed path of the wire and the retreat position being offset from the loop feed path of the wire and offset from the guide position in a direction away from the object, and
wherein the guide member is moved from the guide position to the retreat position after starting an operation of feeding the wire in the reverse direction by the wire feeder.

5. The binding machine according to claim 4 , wherein
the pulling unit further includes:
a support member having an end portion, the support member being rotatable such that the guide member moves between the guide position and the retreat position by rotation motion of the support member;
a spring urging the support member in a direction to move the guide member toward the guide position or toward the retreat position; and
an actuator that regulates rotation of the support member in the direction in which the spring urges the support member.

6. The binding machine according to claim 4 , further including a controller configured to control movement of the guide member from the guide position to the retreat position.

7. The binding machine according to claim 4 , further including a controller configured to control movement of the guide member from the guide position to the retreat position based on at least one of elapse of time, a feeding amount of the wire, and a load applied to the wire, after starting an operation of feeding the wire in the reverse direction by the wire feeder.

8. The binding machine according to claim 4 , wherein the wire is fed in the forward direction by the wire feeder before the guide member is moved from the guide position to the retreat position by the guide member moving mechanism after starting an operation of feeding the wire in the reverse direction by the wire feeder.

9. The binding machine according to claim 4 , wherein the pulling unit further includes a spring urging the guide member in a direction in which the guide member moves to the guide position,
wherein the guide member has a surface facing outward of the loop feed path of the wire, the surface of the guide member being inwardly inclined from one side near the retreat position to another side near the guide position, and
wherein, when the wire is fed in the reverse direction, the guide member is pushed toward the retreat position by wire in contact with the inclined surface of the guide member.

10. The binding machine according to claim 1 , wherein the pulling unit includes a guide member provided for the curl guide,
wherein the guide member is fixed at a position on a radially inner side of the loop feed path of the wire,
wherein the curl guide has a surface facing the guide member, with a gap between the surface of the curl guide and the guide member, and with the loop feed path extending through the gap, and
wherein the guide member has a surface facing outward of the loop feed path of the wire, the surface of the guide member being inwardly inclined toward the gap.

Assignees

• Max Co Ltd

Inventors

• Morimura Kouichirou
• Yoshida Yusuke

Classifications

• E04G21/123 Primary

  Wire twisting tools (bundling articles by twisting, e.g. wire B65B13/28; bundling rods, sticks, or like elongated objects with, e.g. wire B65B27/10; tying devices for hops, vines or trees with, e.g. wire A01G17/08) · CPC title

• B65B13/185 Primary

  Details of tools (B65B13/24 takes precedence) · CPC title

• B65B13/025 Primary

  Hand-held tools · CPC title

• B65B13/28

  by twisting · CPC title

• B65B13/04

  with means for guiding the binding material around the articles prior to severing from supply · CPC title