US20080110354A1 - Reinforcing Bar Tying Tool - Google Patents

Reinforcing Bar Tying Tool Download PDF

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Publication number
US20080110354A1
US20080110354A1 US11/795,602 US79560205A US2008110354A1 US 20080110354 A1 US20080110354 A1 US 20080110354A1 US 79560205 A US79560205 A US 79560205A US 2008110354 A1 US2008110354 A1 US 2008110354A1
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US
United States
Prior art keywords
tie wire
driving load
tie
amount
reinforcing bar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/795,602
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English (en)
Inventor
Osamu Itagaki
Takahiro Nagaoka
Atsushi Matsuoka
Ichiro Kusakari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Max Co Ltd
Original Assignee
Max Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Max Co Ltd filed Critical Max Co Ltd
Assigned to MAX, CO., LTD. reassignment MAX, CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ITAGAKI, OSAMU, KUSAKARI, ICHIRO, MATSUOKA, ATSUSHI, NAGAOKA, TAKAHIRO
Publication of US20080110354A1 publication Critical patent/US20080110354A1/en
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/122—Machines for joining reinforcing bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/24—Securing ends of binding material
    • B65B13/28—Securing ends of binding material by twisting
    • B65B13/285—Hand tools
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/122—Machines for joining reinforcing bars
    • E04G21/123—Wire twisting tools

Definitions

  • Japanese Patent No. 3496463 discloses an electric reinforcing bar tying tool including a tie wire feeding mechanism which feeds a tie wire wound around a reel so as to wind it around reinforcing bars, a tie wire cutting mechanism which cuts a rear end of a tie wire loop wound around the reinforcing bars so as to separate it from the succeeding tie wire, and a tie wire twisting mechanism which twists the tie wire loop to tie the reinforcing bars, in which, when a trigger lever is pulled, one cycle operation from the feeding of the tie wire to the twisting of the tie wire and the tying of the reinforcing bars can be executed in quite a short time.
  • JP-A-2003-267307, JP-A-2004-142813, JP-A-2004-142814 disclose an electric reinforcing bar tying tool in which, after a tie wire is fed to form a tie wire loop surrounding reinforcing bars, a tie wire twisting mechanism clamps a tip end portion of the tie wire and the tie wire feeding mechanism is driven reversely to pull back the tie wire to wind the tie wire around the reinforcing bars, and then the tie wire twisting mechanism twists the tie wire loop to tie the reinforcing bars, whereby a length of the tie wire loop is adjusted in accordance with the thickness of the reinforcing bar so that a required amount of the tie wire is reduced and a binding finish is improved.
  • the tie wire twisting mechanism When reversely driving the tie wire feeding mechanism to pull back the tie wire and to wind the tie wire around the reinforcing bars the tie wire twisting mechanism needs to clamp the tip end portion of the tie wire.
  • the tie wire is not placed between clamps of the tie wire twisting mechanism for some reasons such as an excessive curvature of the tie wire or an abnormality of the feeding, so that the tie wire cannot be clamped. If the tie wire is not clamped, the entire tie wire loop is pulled back at the time when the tie wire feeding mechanism is reversely driven, so that a tip end of the tie wire may move backward than a feeding start position (a cutting position of a cutter of the tie wire cutting mechanism).
  • a feeding amount of the tie wire is controlled to be constant in a reinforcing bar tying tool, when the tip end of the tie wire is moved backward than a regular position, a feeding length of the tie wire becomes insufficient in a subsequent tying cycle, whereby a tying operation cannot be performed like the preceding tying cycle which has been failed.
  • the tying operation is interrupted and trouble some works are required such as manually feeding the tip end of the tie wire to the regular position and setting the tie wire again.
  • One or more embodiments of the present invention provide a reinforcing bar tying tool which can execute a subsequent tying cycle properly even in a case where a tying operation is failed due to a failure in a tie wire feeding operation, whereby a troublesome work such as a resetting operation of a tie wire is eliminated.
  • the tie wire twisting mechanism fails to clamp the tie wire after feeding the tie wire so that the tie wire is pulled back to a position backward from an initial position passing through the tie wire cutting mechanism, a load increase due to a shearing resistance does not appear at the time of the cutting operation.
  • the tie wire is pulled back to the position backward from the predetermined initial position, and the feeding amount is increased than the normal tie wire feeding amount when starting the subsequent tying operation. Therefore, the shortage of the feeding length of the tie wire is compensated so that the tie wire is fed out to a position where the tie wire twisting mechanism can clamp the tie wire, whereby a normal tying operation is made possible.
  • the reinforcing bar tying tool monitors the driving load amount in a cutting step after the pulling step of tie wire to determine whether the cutting operation is carried out or not, and controls the subsequent tie wire feeding amount in accordance with the determination result. In a case where the clamping of the tip end portion of the tie wire is failed so that the tie wire is pulled back to the position backward from the predetermined initial position, the feeding amount is increased than the normal tie wire feeding amount when starting of the subsequent tying operation.
  • FIG. 1 A side view of a reinforcing bar tying tool.
  • FIG. 2( a ) A front view of a tie wire feeding mechanism and a tie wire cutting mechanism.
  • FIG. 3 A side view of the tie wire feeding mechanism showing a state in which a tie wire is cut.
  • FIG. 4( a ) A front view of the tie wire feeding mechanism showing a state in which the tie wire is pulled back.
  • FIG. 5 An operational flowchart of the reinforcing bar tying tool.
  • FIG. 6 A graph showing a driving current in a tie wire cutting step.
  • FIG. 1 shows a reinforcing bar tying tool 1 , and a tie wire feeding mechanism 3 and a tie wire twisting mechanism 4 are accommodated inside a casing 2 .
  • a tie wire reel (not shown) is loaded inside a magazine 6 disposed on a front side of the grip portion 5 of the casing 2 .
  • a battery pack 7 accommodating an NiMH battery is attached to an end portion of the grip portion 5 , and supplies electric power to a feed motor of the tie wire feeding mechanism 3 and a twist motor of the tie wire twisting mechanism 4 via a power supply circuit board (not shown).
  • a power supply switch 8 , an alarm detection LED 9 and a twisting torque setting dial 10 are disposed on an upper surface of a rear portion of the reinforcing bar tying tool 1 , an alarm detection buzzer (not shown) is accommodated inside the casing 2 .
  • the reinforcing bar tying tool 1 executes an initializing operation, whereby the tie wire feeding mechanism 3 feeds the tie wire by a certain length toward a tie wire guide nose 11 disposed on an upper side, and a rotary cutter of a tie wire cutting mechanism, which will be described later, cuts a tip end portion of the tie wire to position a tip end of the tie wire.
  • the tie wire twisting mechanism 4 performs a series of operations including a clamping operation and a twisting operation in a state in which the tie wire is not clamped, and then stops at its initial position and is placed in a standby state.
  • a reinforcing bar tying operation including a tie wire feeding, a tie wire clamping, a tie wire pulling back, a tie wire cutting and a tie wire twisting is continuously executed.
  • a control portion (not shown) monitors a voltage of the battery pack 7 during the tying operation via a voltage detection circuit, and when the voltage of the battery pack 7 reduces to a predetermined charge recommendation voltage, the control portion sounds a buzzer and lights the alarm detection LED 9 to notify the voltage reduction. Further, the control portion monitors a driving current of the twist motor during the tying operation via the current detection circuit serving as a driving load detecting device, and controls a tie wire feeding amount, which will be described later, in accordance with a current value at the time when the tie wire cutting mechanism driven by the twist motor performs the cutting operation.
  • the tie wire feeding mechanism 3 includes a V-grooved driving gear 14 driven by a feed motor 13 , and a V-grooved driven gear 15 engaging with the V-grooved driving gear 14 , and is configured in such a manner that the V-grooved driving gear 14 and the V-grooved driven gear 15 clamp and feed the tie wire.
  • the tie wire W is fed out upwardly from a tie wire reel inside the magazine.
  • the tie wire W thus fed out is formed in an arc shape along the guide groove on an inner periphery of the tie wire guide nose 11 shown in FIG. 1 , and goes around an outer periphery of reinforcing bars R, and the tip end of the tie wire passes between clamps of the tie wire twisting mechanism 4 .
  • a tie wire guide 18 of a funnel shape is provided beneath a center portion between the V-grooved driving gear 14 and the V-grooved driven gear 15 , so that the tie wire W is passed through the tie wire guide 18 from below and is set between the V-grooved driving gear 14 and the V-grooved driven gear 15 .
  • a rotary cutter 19 which cuts a tie wire is disposed above the tie wire feeding mechanism 3 .
  • the rotary cutter 19 has a known including a pin 20 of a column shape formed with a groove along its diameter direction, and a cutter lever 21 fitted to the pin 20 .
  • a cutter portion 21 a corresponding to the groove of the pin 20 is formed at a portion where the cutter lever 21 is fitted to the pin, and when the cutter lever 21 is rotated with the tie wire being passed through the groove of the pin 20 , the cutter portion 21 a of the cutter lever 21 cuts the tie wire W at an outer peripheral position of the pin 20 .
  • the tie wire is fed out through a space between the center clamp plate and one of the outer side clamp plates.
  • the control portion stops the feeding of the tie wire after feeding the tie wire by a length corresponding to a set number of turns, whereat the tip end of the tie wire reaches a predetermined position at the tie wire guide nose 11 .
  • the clamp plates of the tie wire twisting mechanism 4 clamp the tip end side of the tie wire loop and pull the tie wire back, and at the same time, the tie wire twisting mechanism 4 slides so that the cutter lever 21 of the tie wire cutting mechanism is rotated via the link to cut the rear end of the tie wire loop, whereby the tie wire loop is separated from the succeeding tie wire.
  • the tip end of the tie wire W on a side of the reel is positioned at the outer peripheral position of the pin 20 of the rotary cutter 19 as shown in FIG. 3 .
  • the clamp of the tie wire twist mechanism failed to clamp the tip end of the tie wire after the feeding of the tie wire
  • the tie wire W is pulled back by a length equal to or larger than a fed length upon the tie wire pulling back step after the tie wire feeding step.
  • the tip end of the tie wire W is moved backward than the predetermined position shown in FIG. 3 .
  • there is a trouble in the tying operation of the subsequent cycle in such a case.
  • the control portion monitors the driving current of the twist motor via the current detection circuit, and determines whether it is a cutting operation or a lost operation in which the tie wire is not passed through the rotary cutter 19 , in accordance with a current value at the time when the rotary cutter 19 driven by the twist motor performs the cutting operation.
  • the control portion writes “1” as a feeding amount flag in a RAM when the cutting operation is detected, and writes “0” as the feeding amount flag in the RAM in a case of a non-cutting operation.
  • a graph in FIG. 6 shows the driving current of the twist motor. As shown in the graph, a high current peak appears due to a shearing resistance at the time of cutting of the tie wire.
  • the control portion determines whether the operation is normal or abnormal in accordance with a presence or an absence of such a peak.
  • a cutting determination reference value for determining the cutting operation is predetermined in accordance with a verification result of measuring the current at the time of an actual operation.
  • the tie wire feeding amount control is executed in such a manner that the tie wire feeding amount of the tie wire feeding mechanism 3 is controlled based on the feeding amount flag (step 104 ).
  • the feeding amount flag is “1” which represents the normal state so that the tie wire is fed by a regular amount (step 105 ), whereby the series of the tying operation is executed in which the tie wire twisting mechanism 4 clamps the tip end portion of the tie wire, the tie wire feeding mechanism is driven reversely to pull back the tie wire, the rear end portion of the tie wire is clamped, the tie wire cutting mechanism performs the cutting, and then the tie wire twisting mechanism performs the twisting (step 107 ).
  • the rotary cutter 19 cannot cut the tie wire so it performs the lost operation. Since the predetermined peak of the twist motor driving current does not appear in this case, the feeding amount flag “0” is written in step 108 .
  • the process proceeds from step 103 to step 106 in accordance with the feeding amount flag “0”, whereby an amount obtained by adding a predetermined amount a (a difference L between the predetermined position shown in the figure and the pulled back position) to the normal feeding amount is fed.
  • the tip end of the tie wire W passes between the clamps of the tie wire twisting mechanism 4 and is clamped normally, whereby a manual resetting work of the tie wire can be eliminated, unless there is a remarkable deformation or damage in the tie wire W.
  • a driving load detecting device may be configured to detect the load amount from a voltage or a rotation speed of the twist motor, and various modification may be made within the technical scope of the invention. It is apparent that the invention covers such modifications.
  • Japanese Patent Application Japanese Patent Application No. 2005-012209 filed on Jan. 20, 2005, the content of which is incorporated herein by reference.
  • the subsequent tie wire feeding operation can be performed normally even in a case where the tip end of the biding wire is failed to be clamped so that the tie wire is pulled back excessively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Wire Processing (AREA)
US11/795,602 2005-01-20 2005-12-27 Reinforcing Bar Tying Tool Abandoned US20080110354A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2005-012209 2005-01-20
JP2005012209A JP2006200196A (ja) 2005-01-20 2005-01-20 鉄筋結束機
PCT/JP2005/024235 WO2006077744A1 (ja) 2005-01-20 2005-12-27 鉄筋結束機

Publications (1)

Publication Number Publication Date
US20080110354A1 true US20080110354A1 (en) 2008-05-15

Family

ID=36692134

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/795,602 Abandoned US20080110354A1 (en) 2005-01-20 2005-12-27 Reinforcing Bar Tying Tool

Country Status (8)

Country Link
US (1) US20080110354A1 (ru)
EP (1) EP1840030A1 (ru)
JP (1) JP2006200196A (ru)
AU (1) AU2005326187A1 (ru)
CA (1) CA2595078A1 (ru)
NO (1) NO20073770L (ru)
RU (1) RU2007131445A (ru)
WO (1) WO2006077744A1 (ru)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100147411A1 (en) * 2008-12-12 2010-06-17 Max Co., Ltd. Reinforcing bar binding machine
CN102101540A (zh) * 2009-12-17 2011-06-22 美克司株式会社 钢筋捆扎机的运转方法
US9597724B2 (en) 2010-09-02 2017-03-21 Jon R. Kodi Wire twisting tools and methods
US20180187434A1 (en) * 2016-12-29 2018-07-05 Max Co., Ltd. Binding machine
US20190389609A1 (en) * 2008-05-19 2019-12-26 Max Co., Ltd. Brake system of wire reel in reinforcing bar binding machine
CN111483639A (zh) * 2016-12-29 2020-08-04 美克司株式会社 捆扎机
US20200399915A1 (en) * 2016-12-29 2020-12-24 Max Co., Ltd. Binding machine
US20210002911A1 (en) * 2019-07-05 2021-01-07 Makita Corporation Rebar tying tool
US11346107B2 (en) * 2016-01-28 2022-05-31 Makita Corporation Rebar tying tool
US11370054B2 (en) 2019-08-15 2022-06-28 Forney Industries, Inc. Wire spool gun

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5182212B2 (ja) * 2009-05-12 2013-04-17 マックス株式会社 鉄筋結束機
CN102849239A (zh) * 2012-09-26 2013-01-02 煤炭科学研究总院爆破技术研究所 自动捆扎机
CN104343242A (zh) * 2013-07-31 2015-02-11 宁波三泰电子科技有限公司 一种全自动钢筋捆扎机的绕丝总成
JP6500608B2 (ja) * 2015-05-29 2019-04-17 マックス株式会社 鉄筋結束機
US11365552B2 (en) * 2017-06-07 2022-06-21 Max Co., Ltd. Binding machine
JP7469971B2 (ja) 2020-06-30 2024-04-17 株式会社マキタ 鉄筋結束機

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3314911B2 (ja) * 1996-08-02 2002-08-19 マックス株式会社 鉄筋結束機におけるワイヤ絡み防止方法
JP4016799B2 (ja) * 2002-10-24 2007-12-05 マックス株式会社 鉄筋結束機

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11780621B2 (en) * 2008-05-19 2023-10-10 Max Co., Ltd. Brake system of wire reel in reinforcing bar binding machine
US20190389609A1 (en) * 2008-05-19 2019-12-26 Max Co., Ltd. Brake system of wire reel in reinforcing bar binding machine
US11136770B2 (en) 2008-12-12 2021-10-05 Max Co., Ltd. Reinforcing bar binding machine
US8752593B2 (en) * 2008-12-12 2014-06-17 Max Co., Ltd. Reinforcing bar binding machine
US9556628B2 (en) 2008-12-12 2017-01-31 Max Co., Ltd. Reinforcing bar binding machine
US10094127B2 (en) 2008-12-12 2018-10-09 Max Co., Ltd. Reinforcing bar binding machine
US20100147411A1 (en) * 2008-12-12 2010-06-17 Max Co., Ltd. Reinforcing bar binding machine
CN102101540A (zh) * 2009-12-17 2011-06-22 美克司株式会社 钢筋捆扎机的运转方法
US20110146833A1 (en) * 2009-12-17 2011-06-23 Max Co., Ltd. Operating method of reinforcing bar binding machine
US8636038B2 (en) * 2009-12-17 2014-01-28 Max Co., Ltd. Operating method of reinforcing bar binding machine
US9597724B2 (en) 2010-09-02 2017-03-21 Jon R. Kodi Wire twisting tools and methods
US11346107B2 (en) * 2016-01-28 2022-05-31 Makita Corporation Rebar tying tool
US20190249447A1 (en) * 2016-12-29 2019-08-15 Max Co., Ltd. Binding machine
US11795710B2 (en) * 2016-12-29 2023-10-24 Max Co., Ltd. Binding machine
US10851551B2 (en) 2016-12-29 2020-12-01 Max Co., Ltd. Binding machine
US20200399915A1 (en) * 2016-12-29 2020-12-24 Max Co., Ltd. Binding machine
US11946267B2 (en) * 2016-12-29 2024-04-02 Max Co., Ltd. Binding machine
US10590666B2 (en) 2016-12-29 2020-03-17 Max Co., Ltd. Binding machine
CN111483639A (zh) * 2016-12-29 2020-08-04 美克司株式会社 捆扎机
CN111483640A (zh) * 2016-12-29 2020-08-04 美克司株式会社 捆扎机
US20180187434A1 (en) * 2016-12-29 2018-07-05 Max Co., Ltd. Binding machine
US20210002911A1 (en) * 2019-07-05 2021-01-07 Makita Corporation Rebar tying tool
US11851898B2 (en) * 2019-07-05 2023-12-26 Makita Corporation Rebar tying tool
US11548089B2 (en) * 2019-08-15 2023-01-10 Forney Industries, Inc. Wire spool gun
US11597029B2 (en) 2019-08-15 2023-03-07 Forney Industries, Inc. Wire spool gun
US11370054B2 (en) 2019-08-15 2022-06-28 Forney Industries, Inc. Wire spool gun

Also Published As

Publication number Publication date
JP2006200196A (ja) 2006-08-03
WO2006077744A1 (ja) 2006-07-27
CA2595078A1 (en) 2006-07-27
NO20073770L (no) 2007-10-19
EP1840030A1 (en) 2007-10-03
AU2005326187A1 (en) 2006-07-27
RU2007131445A (ru) 2009-02-27

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MAX, CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ITAGAKI, OSAMU;NAGAOKA, TAKAHIRO;MATSUOKA, ATSUSHI;AND OTHERS;REEL/FRAME:019600/0493

Effective date: 20070711

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION