CN102874589B - Narrow-band converging machine - Google Patents

Narrow-band converging machine Download PDF

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Publication number
CN102874589B
CN102874589B CN201210400969.9A CN201210400969A CN102874589B CN 102874589 B CN102874589 B CN 102874589B CN 201210400969 A CN201210400969 A CN 201210400969A CN 102874589 B CN102874589 B CN 102874589B
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Prior art keywords
narrow
arrowband
tensioning
roller
unit module
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CN102874589A (en
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房殿军
王同旭
马贤祥
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Shanghai Dema Logistics Technology Co Ltd
Damon Technology Group Corp Ltd
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Zhejiang Damon Technology Co Ltd
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Abstract

The invention relates to automatic logistics conveying and sorting machinery, in particular to a narrow-band converging machine, and belongs to the technical field of logistics sorting. A narrow-band converging machine is characterized in that: the narrow-band converging machine comprises a plurality of narrow-band unit modules, each narrow-band unit module comprises a supporting plate, an end roller, a tensioning roller and a tail roller/tail roller group, wherein the corresponding part of the inner side of each narrow band is independent, and each tensioning roller is connected with a corresponding tensioning adjusting device; the narrow-band unit module is fixed on the rack; the narrow-band unit modules are arranged in parallel and have gaps; the driving roller is arranged on the outer side of the narrow belt. The narrow-band converging machine can respectively adjust the tensioning degree of each narrow band; each narrow-band unit module of the narrow-band confluence machine can be independently installed and detached, and the installation and maintenance efficiency is greatly improved.

Description

A kind of Narrow-band confluence machine
Technical field
The present invention relates to a kind of logistics automatic transport sorting machinery, particularly relate to a kind of Narrow-band confluence machine, belong to logistics Sorting Technique field.
Background technology
Narrow-band confluence machine is a kind of equipment of widespread use in conveying sorting system, as shown in Figure 1, this equipment connection branch travel line and main conveyor line, and form certain angle with main conveyor line, as 30 ° or 45 ° etc., goods is transferred in Narrow-band confluence machine by branch's travel line, by Narrow-band confluence machine by cargo transfer to main conveyor line, change throughput direction, realize article joining effect.
Current Narrow-band confluence machine adopted structure as shown in Figure 2,3 more, head roll 4, integral type tensioning roller, integrated end roller are the elongated roller that all arrowbands share, afterbody roller/afterbody roller group is the short roller cylinder that every root arrowband is used alone, and all rollers are all fixed in frame, all arrowbands are wrapped in outside driving roller 4, integrated end roller, and namely driving roller 4, integrated end cylinder are inside arrowband.By all arrowbands of integral type tightening device 12 tensioning regulating frame 11 side other, drive driving roller 4 by motor 10, drive every root arrowband 2 to run, goods is transferred on main conveyor line effectively.
Prior art Problems existing and weak point:
1, as shown in Figure 2, by the integral type tightening device tensioning arrowband regulating frame side other, because every root arrowband length is different, and tensioning regulated quantity is identical, so the adjustment tensioning degree of every root arrowband is different, be difficult to ensure that every root belt tension degree can meet work requirements.
2, as shown in Figure 3, driving roller 4, integrated end roller, all inside all arrowbands, all arrowbands all need be wrapped in order outside driving roller 4, integrated end roller during installation, then installing one by one, fixing other parts, bring very big inconvenience to installation like this, reduce installation effectiveness.
3, because driving roller 4, integrated end roller are inside arrowband, at maintenance equipment or when changing any arrowband, almost need whole Narrow-band confluence machine to dismantle, could keep in repair, change.For this reason, considerably increase maintenance, change work capacity, and maintenance, change after need to reinstall whole Narrow-band confluence machine, debugging.
Summary of the invention
The technical issues that need to address of the present invention are:
1, because every root arrowband length is different, and tensioning regulated quantity is identical, so the adjustment tensioning degree of every root arrowband is different, is difficult to ensure that every root belt tension degree can meet work requirements.
All belts all need be wrapped in order outside driving roller 4, integrated end roller when 2, installing, then installing one by one, fixing other parts, bring very big inconvenience to installation like this, reduce installation effectiveness.
3, at maintenance equipment or when changing any arrowband, almost need whole Narrow-band confluence machine to dismantle, could keep in repair, change.For this reason, considerably increase maintenance, change work capacity, and maintenance, change after need to reinstall whole Narrow-band confluence machine, debugging.
Present invention employs following technical scheme:
A kind of Narrow-band confluence machine, comprise frame 11, motor 10, driving roller 4, the many arrowbands 2 be arranged in parallel, wherein, frame 11 is the supporting construction of described conveying Narrow-band confluence machine, driving roller 4 and described arrowband 2 tensioning are fitted, and described motor 10 drives driving roller 4 to rotate, and described driving roller 4 drives arrowband 2 synchronous axial system; Described Narrow-band confluence machine comprises multiple narrowband unit module, described narrowband unit module comprises corresponding part independently supporting plate 8, end roller 1, tensioning roller 3, afterbody roller/afterbody roller group inside every bar arrowband 2, and each tensioning roller 3 connects with corresponding tightening regulator 9; Described narrowband unit module is fixed in frame 11; Described multiple narrowband unit module parallel arranges and has gap; Described driving roller 4 is arranged at the outside of described arrowband 2.
Further, described driving roller 4 is arranged at below described arrowband 2, and described narrowband unit module also comprises interior side steering roll, and described interior side steering roll is positioned at inside described arrowband 2, and can strengthen the area of contact of arrowband and driving roller 4.
Further, also comprise outer side steering roll, described outer side steering roll is positioned at outside described arrowband, and can position arrowband.
Further, described tightening regulator 9 is arranged at the inside of described narrowband unit module, comprise two parallel tensioning screw 9a, described tensioning screw 9a one end is fixedly connected with supporting plate 8, the other end is fixedly connected with Tension frame 9b, belt tensioning drum 3 is fixed on described Tension frame 9b, and synchronization regulation two tensioning screw 9a's is flexible, namely regulates the tensioning degree of belt tensioning drum 3 and arrowband 2.
Present invention employs the form of narrowband unit module, namely, by driving roller 4, end roller 1, tensioning roller 3 and be positioned at all guiding inside arrowband 2, the roller of positioning action all separates with the form of narrowband unit module, supporting plate 8 is made independently strip, driving roller 4 is arranged at the outside of arrowband 2, each tensioning roller 3 carries out the adjustment of tensioning degree by independently tightening regulator 9 again.
Beneficial effect of the present invention is:
1, when mounted Narrow-band confluence machine narrowband unit module can being installed separately, without the need to being disassembled each arrowband when dismounting, maintenance, only need removing the narrowband unit module that will keep in repair.Convenient installation, dismounting, maintenance, substantially increase installation, maintenance efficiency.
2, owing to adopting narrowband unit modular construction, simplify design, production, maintenance complexity, shorten design, production cycle, reduce equipment use cost and maintenance cost.
3, make each narrowband unit module into be provided with independent tightening regulator because all arrowbands are shared a tightening regulator by the present invention, by regulating tightening regulator respectively, with the different tensioning demand in the arrowband meeting different length, improve part service life and reliability.
4, tightening regulator is arranged on the inside of narrowband unit module, shorten spacing between arrowband, make it can carry less goods, conveying articles is more steady, strengthens its traffic capacity.
5, the blank of domestic and international fast assembling-disassembling modular Narrow-band confluence machine is filled up.
Accompanying drawing explanation
Fig. 1 is the connection diagram of Narrow-band confluence machine and main conveyor line and branch's travel line.
Fig. 2 is the schematic top plan view of the Narrow-band confluence machine of prior art.
Fig. 3 is the roller connection diagram of the Narrow-band confluence machine of prior art.
Fig. 4 is Narrow-band confluence machine narrowband unit module diagram of the present invention.
Fig. 5 is the front schematic view of tightening regulator of the present invention.
Fig. 6 is the side schematic view of tightening regulator of the present invention.
Wherein, 1, end roller, 2, arrowband, 3, tensioning roller, 4, driving roller, 5, medial and lateral guiding roller, 6, carrying roller, 7, afterbody roller, 8, supporting plate, 9, tightening regulator, 9a, tensioning screw, 9b, Tension frame, 10, motor, 11, frame, 12, integral type tightening device.
Detailed description of the invention
As shown in Figure 4, part corresponding for every bar arrowband in Narrow-band confluence machine is made narrowband unit module, and be separated with the frame 11 of Narrow-band confluence machine and driving roller 4, namely, every bar arrowband and inner corresponding end roller 1 thereof, tensioning roller 3, tightening regulator 9, interior side steering roll cylinder, afterbody roller 7, supporting plate 8, and the carrying roller 6 outside arrowband, outer side steering roll cylinder etc. constitutes narrowband unit module, composition graphs 2 can be found out, each narrowband unit module is parallel to each other, phase mutual edge distance certain interval, and be all fixed in frame 11, driving roller is arranged on the outer side-lower in arrowband 2, the direct pressure in arrowband 2 is on driving roller 4, driving roller 4 produces propulsive effort, due to driving roller 4 is arranged on outside arrowband 2, load and unload arrowband under making not dismounting head roll 4 situation and become possibility, and tightening regulator 9 is arranged on separately each narrowband unit module, thus as required the tensioning degree of every root arrowband is regulated respectively.
As shown in Figure 4,5, 6, tightening regulator 9 is arranged at the inside of narrowband unit module, comprise two parallel tensioning screw 9a, tensioning screw 9a upper end is fixedly connected with supporting plate 8, lower end is fixedly connected with Tension frame 9b, belt tensioning drum 3 is fixed on Tension frame 9b, and synchronization regulation two tensioning screw 9a's is flexible, namely regulates the tensioning degree of belt tensioning drum 3 and arrowband 2.
As shown in Figure 4, in order to strengthen the area of contact of driving roller 4 and arrowband 2 thus strengthen arrowband 2 and the friction force of driving roller 4, an interior side steering roll is set inside the arrowband of the lower right of driving roller 4, each narrowband unit module; For regulating the trend of arrowband 2, in the upper right side of driving roller, the outer side steering roll that arrowband arranged outside one is corresponding with interior side steering roll.
As shown in Figure 4, narrowband unit module is grouped into by left side drive part and right sustaining portion, drive part is standard module section, support section is the modular segment of full-length series, can splice fast, there are independently end roller 1, tensioning roller 3, inside and outside side steering roll cylinder 5, tuningout roller 7 in each narrowband unit module, realize standard modular.
As shown in Figure 4, use narrowband unit modular form, arrowband 2 pressure is on head roll 4, Narrow-band confluence machine frame and narrowband unit module can be installed separately, time assembled, narrowband unit module is fixed on Narrow-band confluence machine frame, make the direct pressure in its arrowband on driving roller by regulating tensioning screw, when dismounting, maintenance, remove the narrowband unit module that will keep in repair, thus ensure dismounting, maintenance efficiency.
As shown in Figure 4,5, 6, according to every root arrowband tensioning degree, regulate a tight device 9 of adjustment of each narrowband unit module respectively, with the different tensioning demand in the arrowband meeting different length, to improve part service life and reliability.Tightening regulator 9 is arranged on narrowband unit inside modules, above narrowband unit module, regulates tensioning screw 9a, to shorten narrowband unit intermodule distance, make it not only can carry less goods but also conveying stability and traffic capacity can be strengthened.As shown in Figure 5, Tension frame 9b is embedded in narrowband unit module biside plate square groove, and by regulating tensioning screw 9a, Tension frame 9b can slide up and down in narrowband unit module biside plate square groove, to realize regulating arrowband tensioning degree.Adopt two tensioning screw 9a to regulate simultaneously, be stuck in narrowband unit module biside plate square groove to avoid because Tension frame when regulating occurs deflection.

Claims (3)

1. a Narrow-band confluence machine, comprise frame (11), motor (10), driving roller (4), the many arrowbands (2) be arranged in parallel, wherein, the supporting construction that frame (11) is described Narrow-band confluence machine, driving roller (4) and described arrowband (2) tensioning are fitted, described motor (10) drives driving roller (4) to rotate, and described driving roller (4) drives arrowband (2) synchronous axial system;
It is characterized in that: Narrow-band confluence machine comprises multiple narrowband unit module, described narrowband unit module comprises every bar arrowband (2) inner side corresponding part independently supporting plate (8), end roller (1), tensioning roller (3), afterbody roller/afterbody roller group, and each tensioning roller (3) connects with corresponding tightening regulator (9);
Described narrowband unit module is fixed in frame (11);
Described multiple narrowband unit module parallel arranges and has gap;
Described driving roller (4) is arranged at the outside of described arrowband (2);
Described tightening regulator (9) is arranged at the inside of described narrowband unit module, comprise two parallel tensioning screws (9a), described tensioning screw (9a) one end is connected with supporting plate (8), and the other end is fixedly connected with Tension frame (9b);
According to every root arrowband tensioning degree, regulate the tight device of an adjustment (9) of each narrowband unit module respectively, with the different tensioning demand in the arrowband meeting different length;
Above narrowband unit module, regulating tensioning screw (9a), by regulating tensioning screw (9a), to shorten narrowband unit intermodule distance, making it not only can carry less goods but also conveying stability and traffic capacity can be strengthened;
Tension frame (9b) can slide up and down in narrowband unit module biside plate square groove, tensioning roller (3) is fixed in described Tension frame (9b), stretching of synchronization regulation two tensioning screws (9a), namely regulates the tensioning degree of tensioning roller (3) and arrowband (2).
2. Narrow-band confluence machine as claimed in claim 1, it is characterized in that: described driving roller (4) is arranged at below, described arrowband (2), described narrowband unit module also comprises interior side steering roll, described interior side steering roll is positioned at inner side, described arrowband (2), and can strengthen the area of contact of arrowband and driving roller (4).
3. Narrow-band confluence machine as claimed in claim 2, it is characterized in that: also comprise outer side steering roll, described outer side steering roll is positioned at outside described arrowband, and can position arrowband.
CN201210400969.9A 2012-10-18 2012-10-18 Narrow-band converging machine Active CN102874589B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023249745A1 (en) * 2022-06-23 2023-12-28 Laitram, L.L.C. Short take-up belt conveyor

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* Cited by examiner, † Cited by third party
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CN104003175B (en) * 2013-02-21 2017-02-08 上海嘉峥机械有限公司 45-degree narrow belt confluence machine for logistics automatic conveying line
CN103640851A (en) * 2013-11-05 2014-03-19 张家港保税区多元机械设备制造有限公司 Jacking and steering conveyor
CN105083906B (en) * 2015-08-24 2018-07-24 佛山市瑞普华机械设备有限公司 Self-adaptive belt adjusting device
CN107902322A (en) * 2017-12-27 2018-04-13 新乡市倍儿鲜食品有限公司 A kind of dumpling conveyer structure
CN109230436B (en) * 2018-08-16 2023-08-29 广东信源物流设备有限公司 Split-and-combined belt conveyor
CN110304416A (en) * 2019-08-12 2019-10-08 昆山世度机械科技有限公司 Belt flow-combining machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928810A (en) * 1986-09-19 1990-05-29 Ab Volvo Conveyor
US7588139B1 (en) * 2008-08-12 2009-09-15 Campbell Iii William Arthur Conveyor assembly
CN201665412U (en) * 2010-04-12 2010-12-08 重庆钢铁(集团)有限责任公司 Tension device for material-feeding belt conveyor
CN202156722U (en) * 2011-06-24 2012-03-07 科峤工业股份有限公司 Conveyer belt guiding device having function of shift correction
CN202245125U (en) * 2011-09-29 2012-05-30 衡阳运输机械有限公司 Combined conveying belt tension adjustment device
CN202935928U (en) * 2012-10-18 2013-05-15 浙江德马科技有限公司 Narrow-band combined machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2390847Y (en) * 1999-10-10 2000-08-09 内蒙古乾坤金银精炼股份有限公司 Convey belt tension apparatus for electrolytic tank
US7584840B2 (en) * 2007-08-02 2009-09-08 Mishmash Rodney R Strip belt conveyor
CN201592885U (en) * 2009-12-30 2010-09-29 上海人造板机器厂有限公司 Belt conveyer
CN202492123U (en) * 2012-02-27 2012-10-17 杭州永创智能设备股份有限公司 Conveying device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928810A (en) * 1986-09-19 1990-05-29 Ab Volvo Conveyor
US7588139B1 (en) * 2008-08-12 2009-09-15 Campbell Iii William Arthur Conveyor assembly
CN201665412U (en) * 2010-04-12 2010-12-08 重庆钢铁(集团)有限责任公司 Tension device for material-feeding belt conveyor
CN202156722U (en) * 2011-06-24 2012-03-07 科峤工业股份有限公司 Conveyer belt guiding device having function of shift correction
CN202245125U (en) * 2011-09-29 2012-05-30 衡阳运输机械有限公司 Combined conveying belt tension adjustment device
CN202935928U (en) * 2012-10-18 2013-05-15 浙江德马科技有限公司 Narrow-band combined machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023249745A1 (en) * 2022-06-23 2023-12-28 Laitram, L.L.C. Short take-up belt conveyor

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Inventor after: Fang Dianjun

Inventor after: Wang Tongxu

Inventor after: Ma Xianxiang

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Inventor before: Wang Dejian

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