CN103075985B - Belt length measurement method and device - Google Patents

Belt length measurement method and device Download PDF

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Publication number
CN103075985B
CN103075985B CN201210576426.2A CN201210576426A CN103075985B CN 103075985 B CN103075985 B CN 103075985B CN 201210576426 A CN201210576426 A CN 201210576426A CN 103075985 B CN103075985 B CN 103075985B
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China
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belt
switch
head
length
transfer rate
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CN103075985A (en
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刘庆春
赵瑞青
孙国徽
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Sailun Dongying Tyre Co Ltd
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SHANDONG JINYU INDUSTRIAL Co Ltd
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Abstract

The invention discloses a kind of belt length measurement method and device, when the head of belt arrives speed reducing switch, reduce the transfer rate of conveying belt; When the head of belt arrives fixed length switch, the instantaneous position a when head of record belt arrives, and the transfer rate improving conveying belt after end of record (EOR) is when the afterbody of belt arrives speed reducing switch, again reduces the transfer rate of conveying belt; When the afterbody of belt arrives fixed length switch, the instantaneous position b when afterbody of record belt arrives, and after end of record (EOR), again improve the transfer rate of conveying belt; The last length calculating described belt according to a and b.Wherein the head of belt arrives the moment of moment early than the head arrival fixed length switch of belt of speed reducing switch.

Description

Belt length measurement method and device
Technical field
The present invention relates to tire manufacturing techniques field, particularly belt length measurement method and device.
Background technology
Belt, also known as supporting layer, rigid breaker and resistant strata, refers under the tread base of radial and bias belted tyre, along the material layer of circumferential line circumferencial direction banding carcass.
The starting material of belt are that continuous print about 100 meters rolls up.In actual production, the belt starting material of rolling through leading out, measure and cut (this process is also called fixed length) after become belt.Then belt is attached on a columniform drum (belt drum) through conveying belt transmission and carries out the head of belt and the joint of tail.Because there is magnet on belt drum surface, there is steel wire the inside of belt, and therefore belt can well be attached on belt drum.Because overlapping appears in the joint of the head of belt and tail or gap all can affect the homogeneity of tire, so will ensure that head docks with the tight of tail, this just requires the length of belt and the girth strict conformance of belt drum.
Due to the limitation of existing technique, the length of belt is difficult to ensure the girth strict conformance with belt drum.Prior art is by double measurement, records the actual length of belt.And then by slightly stretching or shrinking the tight docking that belt ensures joint.Therefore, the actual length how recording belt becomes the key point realizing the head of belt and dock with the tight of tail.
Existing double measurement method, when referring to that the head of the belt transmitted through conveying belt arrives fixed length switch, fixed length switch notice PLC(programmable logic controller (PLC)) head that records belt position a when arriving; When the afterbody of the belt that conveying belt transmits arrives fixed length switch, fixed length switch can notify the position b during afterbody arrival of PLC record belt again, then the actual length of belt is b-a.
The disadvantage of prior art is that accuracy and efficiency can not get both.Because fixed length switch has a response time, within this response time, the transfer rate of conveying belt is faster, the head position a of measured belt and the error of tail position b larger.Therefore, the accuracy of the length of measured belt is poorer.If but reduced the transfer rate of conveying belt, the reduction of the efficiency measuring belt length will inevitably be caused again.
Summary of the invention
In view of this, the object of the present invention is to provide belt length measurement method and device, to realize, under the prerequisite ensureing belt linear measure longimetry accuracy, improving the efficiency measuring belt length.
For achieving the above object, the invention provides following technical scheme:
A kind of belt length measurement method, based on belt length-measuring appliance, described belt length-measuring appliance at least comprises speed reducing switch and fixed length switch, and described method comprises:
When the head of belt arrives described speed reducing switch, reduce the transfer rate of conveying belt;
When the head of described belt arrives described fixed length switch, record the instantaneous position a during head arrival of described belt, and after end of record (EOR), improve the transfer rate of described conveying belt;
When the afterbody of belt arrives described speed reducing switch, again reduce the transfer rate of described conveying belt;
When the afterbody of described belt arrives described fixed length switch, record the instantaneous position b during afterbody arrival of described belt, and after end of record (EOR), again improve the transfer rate of described conveying belt;
The length of described belt is calculated according to described a and b;
The moment that the head of described belt arrives described speed reducing switch arrives the moment of described fixed length switch early than the head of described belt.
Preferably, the transfer rate of described reduction conveying belt specifically comprises: the transfer rate of described conveying belt is reduced to 5mm/s.
Preferably, the transfer rate of the described conveying belt of described raising specifically comprises: the transfer rate of described conveying belt is increased to 300mm/s.
Preferably, described speed reducing switch and described fixed length switch are being 1cm-5cm along the spacing on described conveying belt direction of transfer.
Preferably, the described length calculating described belt according to described a and b comprises: the length calculating described belt according to formula L=b-a+c, and described c is the constant that machine error compensates, and described L represents the length of described belt.
Preferably, described c value is 4mm-8mm.
Preferably, the described length calculating described belt according to described a and b comprises: the length calculating described belt according to formula L=b-a, described L represents the length of described belt.
A kind of belt length-measuring appliance, at least comprises speed reducing switch, fixed length switch and programmable logic controller (PLC) PLC;
Described speed reducing switch is used for, and when the head of belt or the afterbody of belt arrive, notifies that described PLC reduces the transfer rate of conveying belt;
Described fixed length switch is used for; when the head of described belt arrives; notify described PLC record described belt head arrive time instantaneous position a; and after end of record (EOR), notify that described PLC improves the transfer rate of described conveying belt; and when the afterbody of described belt arrives; notify the instantaneous position b when afterbody that described PLC records described belt arrives, and after end of record (EOR), notify that described PLC improves the transfer rate of described conveying belt;
Described PLC is used for, when the head of belt or the afterbody of belt arrive described speed reducing switch, reduce the transfer rate of described conveying belt, when the head of belt arrives described fixed length switch, record the instantaneous position a during head arrival of described belt, and after end of record (EOR), improve the transfer rate of described conveying belt, and when the afterbody of belt arrives described fixed length switch, record the instantaneous position b during afterbody arrival of described belt, and after end of record (EOR), improve the transfer rate of described conveying belt, the last length calculating described belt according to described a and b,
The moment that the head of described belt arrives described speed reducing switch arrives the moment of described fixed length switch early than the head of described belt.
Preferably, the described length calculating described belt according to described a and b comprises: the length calculating described belt according to formula L=b-a+c, and described c is the constant that machine error compensates, and described L represents the length of described belt.
Preferably, described c value is 4mm-8mm.
As can be seen from above-mentioned technical scheme, in embodiments of the present invention, when the head of belt or afterbody arrive speed reducing switch, will reduce the transfer rate of conveying belt, therefore the head of belt or afterbody can be sent to fixed length switch under the transfer rate of relative low speeds.Because the transfer rate of conveying belt is relatively low, and the response time of fixed length switch is certain, the error of the instantaneous position b when instantaneous position a when head of therefore recorded belt arrives or the afterbody of belt arrive is less, therefore can ensure the accuracy of the length of the belt calculated according to a and b.Simultaneously, after the instantaneous position when instantaneous position when head recording belt arrives and the afterbody of belt arrive terminates, the present invention the transfer rate of conveying belt will be improved, so under the prerequisite ensureing accuracy, can improve the efficiency measuring belt length.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the belt length-measuring appliance that the embodiment of the present invention provides;
Fig. 2 is the belt length measurement method process flow diagram that the embodiment of the present invention provides;
Fig. 3 and Fig. 4 is that the belt length-measuring appliance that the embodiment of the present invention provides realizes cutting schematic diagram;
Fig. 5 a is another process flow diagram of belt length measurement method that the embodiment of the present invention provides;
Fig. 5 b is the another process flow diagram of belt length measurement method that the embodiment of the present invention provides;
Fig. 6 is the another schematic diagram that belt length-measuring appliance that the embodiment of the present invention provides realizes cutting;
Fig. 7 a is the another process flow diagram of belt length measurement method that the embodiment of the present invention provides;
Fig. 7 b is another process flow diagram of belt length measurement method that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The present invention based on belt length-measuring appliance as described in Figure 1, belt length-measuring appliance at least comprises speed reducing switch 11 and fixed length switch 12, wherein, speed reducing switch 11 and fixed length switch 12 can be 1cm-5cm along the spacing on the direction of transfer 10 of conveying belt.
Belt starting material 14 become belt 17 after cutting means 15 cuts, visible as shown in Figure 1, along in the transmission direction 10 of conveying belt, be followed successively by the afterbody 19 of belt 17 and the head 18 of belt 17, and the head 18 of belt arrives moment that the first fixed length closes 11 arrives fixed length switch 12 moment early than the head 18 of belt.Speed reducing switch 11 can be connected by communication cable with PLC, and fixed length switch 12 also can be connected by communication cable with PLC.Based on above-mentioned belt length-measuring appliance, see Fig. 2, the belt length measurement method that the embodiment of the present invention provides can be used in double measurement, and it at least can comprise the following steps:
S1: when the head 18 of belt arrives speed reducing switch 11, reduces the transfer rate of conveying belt 13;
In the specific implementation, speed reducing switch 11 can be optoelectronic switch.The change of the power of light between transmitting terminal and receiving end is converted into change or the open/close state change of switching signal by optoelectronic switch.And when the head 18 of belt is when optoelectronic switch (speed reducing switch 11), the power change sending out light between receiving end can be caused, thus produce change or the open/close state change of switching signal.
For the situation changing open/close state, because speed reducing switch 11 can be connected by communication cable with PLC, therefore PLC can the open/close state of intermittent scanning speed reducing switch 11, when the open/close state that PLC scans speed reducing switch 11 changes, then sends deceleration instruction to servomotor 16.And servomotor 16 is after the deceleration instruction receiving PLC transmission, the transfer rate of conveying belt 13 will be reduced.Also can think, speed reducing switch 11, by the change of the on off state of self, notifies PLC's.
Change situation for switching signal, speed reducing switch 11 notifies PLC by the switching signal exported, and PLC, when switching signal changes, sends deceleration instruction to servomotor 16, with the transfer rate making servomotor 16 reduce conveying belt 13.
Transfer rate as conveying belt 13 needs to be down to how many, and those skilled in the art can determine according to the response time of fixed length switch 12, and such as, the transfer rate of conveying belt 13 can be reduced to 5mm/s, therefore not to repeat here.
S2: when the head 18 of belt arrives fixed length switch 12, the instantaneous position a when head 18 of record belt arrives, and after end of record (EOR), improve the transfer rate of conveying belt 13;
Fixed length switch 12 is identical with the principle of speed reducing switch 11.Unlike, when the head 18 of belt is through fixed length switch 12, to trigger the PLC position of feeding back according to servomotor 16, (servomotor can measure the position of belt, and the position of belt can be fed back to PLC by servomotor simultaneously to obtain the position of belt 17.), after end of record (EOR), transmission is raised speed instruction to servomotor 16 by PLC simultaneously.And after servomotor 16 receives the speed-raising instruction of PLC transmission, then can improve the transfer rate of conveying belt 13.This area can design transfer rate according to actual needs needs to be increased to how many, such as, the transfer rate of conveying belt 13 can be increased to 300mm/s, also not repeat at this.
Therefore, when the head 18 of belt is through fixed length switch 12, the instantaneous position a when head 18 triggering PLC record belt is arrived, and after end of record (EOR), PLC sends the transfer rate that speed-raising instruction improves conveying belt.S3: when the afterbody 19 of belt arrives speed reducing switch 11, reduces the transfer rate of conveying belt 13 again;
The implementation of step S3 and step S1 is similar, does not repeat them here.
S4: when the afterbody 19 of belt arrives fixed length switch 12, the instantaneous position b when afterbody 19 of record belt arrives, and after end of record (EOR), again improve the transfer rate of conveying belt 13.
The implementation of step S4 and step S2 is similar, does not repeat them here.
S5: the length calculating belt 17 according to a and b.
Concrete, the length L of belt 17 can be calculated according to formula L=b-a; Certainly in order to improve the accuracy calculating belt 17 length, also can calculate the length L of belt 17 according to formula L=b-a+c, wherein c is the constant that machine error compensates.Because the error of different belt length-measuring appliances is different, so c value can be 4mm-8mm.
Therefore, in the above-described embodiments, when the head 18 of belt or the afterbody 19 of belt arrive speed reducing switch 11, will reduce the transfer rate of conveying belt 13, therefore the head 18 of belt 17 or afterbody 19 can be sent to fixed length switch 12 under the transfer rate of relative low speeds.Because the transfer rate of conveying belt 13 is relatively low, and the response time of fixed length switch is certain, therefore compared with prior art, the error of the instantaneous position b when afterbody 19 of the instantaneous position a when head 18 of the belt recorded arrives and belt arrives is less, therefore can ensure the accuracy of the length of the belt 17 calculated according to a and b.Simultaneously, after the instantaneous position when afterbody 19 recording instantaneous position when the head 18 of belt arrives and belt arrives terminates, the present invention the transmission degree of conveying belt 13 will be improved, so under the prerequisite ensureing accuracy, can improve the efficiency measuring belt 14 length.
After the length recording belt 14, PLC can calculate the speeds match coefficient of belt drum and conveying belt 13 automatically, reaches by slightly stretching or shrinking belt 14 the tight docking ensureing belt joint.The girth of such as belt drum is 1000mm, if the length of belt 14 is 1000mm just, then with the speed ratio of 1:1, realizes the tight docking of belt 14 joint; If belt length is 998mm, then with the speed ratio of 1:0.998, realize the tight docking of belt 14 joint.
Except for except double measurement, said method can also realize cutting belt starting material 14 by improving.Concrete has following implementation.
Mode one, suppose that the length of belt is in theory 1000mm, then, as shown in Figure 3, in actual production, the distance between cutting means 15 with speed reducing switch 11 can be set to equal with the length of belt (1000mm).
Like this when the head of belt starting material 14(also i.e. belt) when arriving speed reducing switch 11, speed reducing switch 11 notifies PLC by the mode addressed before this paper, PLC is except sending deceleration instruction to except servomotor 16, also send and cut instruction to cutting means 15, complete cutting belt starting material 14 by cutting means 15.Situation after cutting refers to Fig. 4: after cutting, and the afterbody 19 of belt 17 is formed.
Or, also the head at belt starting material 14(also i.e. belt can be designed to) when arriving fixed length switch 12, PLC is except transmission speed-raising instruction is to except servomotor 16, also send simultaneously and cut instruction and cut to cutting means 15, now, the distance that can design between cutting means 15 with fixed length switch 12 is set to equal with the length of belt.
Accordingly, see Fig. 5 a, said method also can comprise the steps:
S6, when belt head arrive speed reducing switch time, cut out the afterbody of belt.
Or see Fig. 5 b, said method also can comprise the steps:
S7, when belt head arrive fixed length switch time, cut out the afterbody of belt.
Mode two, suppose that the length of belt is in theory 1500mm, then, as shown in Figure 6, in actual production, the distance between cutting means 15 and speed reducing switch 11 can be set to 1000mm.Like this when the head of belt starting material 14(also i.e. belt) when arriving speed reducing switch 11, speed reducing switch 11 notifies PLC by the mode addressed before this paper, PLC is except sending deceleration instruction, also sending controling instruction is to servomotor 16, makes servomotor 16 control conveying belt 13 and forwards 500mm again.When servomotor 16 controls after conveying belt 13 completes and forward 500mm, to send to PLC feedback signal.After PLC receives feedback signal, send and cut instruction to cutting means 15, complete cutting belt starting material 14 by cutting means 15.In like manner, after cutting, the afterbody 19 of belt 17 is formed.
It will be appreciated by persons skilled in the art that the distance m1 between cutting means 15 and speed reducing switch 11, and servomotor 16 controls the distance n1 that conveying belt 13 forwards and all can adjust, as long as meet m1 and n1's and equal the length L of belt.
Certainly, the head at belt starting material 14(also i.e. belt also can be designed to) when arriving fixed length switch 12, PLC sending controling instruction, to servomotor 16, makes servomotor 16 control conveying belt 13 and forwards 500mm again.When servomotor 16 controls after conveying belt 13 completes and forward 500mm, to send to PLC feedback signal.After PLC receives feedback signal, send and cut instruction to cutting means 15, complete cutting belt starting material 14 by cutting means 15.In like manner, after cutting, the afterbody 19 of belt 17 is formed.In addition, it will be understood by those skilled in the art that, distance m2 between cutting means 15 and fixed length switch 12, and servomotor 16 controls the distance n2 that conveying belt 13 forwards and all can adjust, as long as meet m2 and n2's and equal the length L of belt.
Accordingly, see Fig. 7 a, said method also can comprise the steps:
S8, when the head of belt arrives speed reducing switch, control to cut out the afterbody of belt.
Above-mentioned " control cuts out the afterbody of belt " can specifically comprise: the afterbody cutting out belt after making Serve Motor Control conveying belt 13 forward predeterminable range n1.
Or see Fig. 7 b, said method also can comprise the steps:
S9, when the head of belt arrives fixed length switch, control to cut out the afterbody of belt.
Above-mentioned " control cuts out the afterbody of belt " can specifically comprise: the afterbody cutting out belt after making Serve Motor Control conveying belt 13 forward predeterminable range n2.
Correspond, the embodiment of the present invention additionally provides belt length-measuring appliance, under can be implemented in the prerequisite ensureing belt linear measure longimetry accuracy, improves the efficiency measuring belt length.
A kind of structure of above-mentioned belt length-measuring appliance is please still see Fig. 1, and it at least comprises speed reducing switch 11, fixed length switch 12 and length computation module (not shown in figure 1).Speed reducing switch 11 and fixed length switch 12 can be 1cm-5cm along the spacing on the direction of transfer 10 of conveying belt, further, the installation site of speed reducing switch 11 and fixed length switch 12 moment of making the head 18 of belt arrive speed reducing switch 11 arrives the moment of fixed length switch 12 early than the head 18 of belt.Wherein, speed reducing switch 11 is for when the head 18 of belt or the afterbody 19 of belt arrive, and notice PLC reduces the transfer rate of conveying belt 13; Concrete introduction about speed reducing switch 11 can see the record of this paper abovementioned steps S1, and therefore not to repeat here.
More specifically, PLC can comprise speed change module, and speed reducing switch 11 notifies speed change module, then speed change module sends deceleration instruction to servomotor 16.And servomotor 16 is after the deceleration instruction receiving PLC transmission, the transfer rate of conveying belt 13 will be reduced.
Fixed length switch 12 is for when the head 18 of belt arrives; notice PLC records the instantaneous position a during head arrival of belt; and after end of record (EOR), notify that PLC improves the transfer rate of conveying belt 13; and when the afterbody 19 of belt arrives; notice PLC records the instantaneous position b during afterbody arrival of belt, and after end of record (EOR), notify that PLC improves the transfer rate of conveying belt 13; Concrete introduction about fixed length switch 12 can see the record of this paper abovementioned steps S2, and therefore not to repeat here.
More specifically, PLC also can comprise logging modle.When the head 18 of belt arrives, fixed length switch 12 notifies the logging modle of PLC by the change of open/close state or the change of switching signal, instantaneous position a when being arrived by the head 18 of the logging modle record belt of PLC, after having recorded simultaneously, speed-raising instruction is sent to servomotor 16 by speed change module, after servomotor 16 receives the speed-raising instruction of PLC transmission, then can improve the transfer rate of conveying belt 13; Similar, when the afterbody 19 of belt arrives, fixed length switch notifies the logging modle of PLC by the change of open/close state or the change of switching signal, instantaneous position b when being arrived by the afterbody 19 of logging modle record belt, after having recorded, speed-raising instruction is sent to servomotor 16 by speed change module.Finally, PLC calculates the length of belt 17 according to a and b.
Calculate the length of belt 17 according to a and b as how, can see the record of this paper abovementioned steps S5 part, therefore not to repeat here.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (10)

1. a belt length measurement method, is characterized in that, based on belt length-measuring appliance, described belt length-measuring appliance at least comprises speed reducing switch and fixed length switch, and described method comprises:
When the head of belt arrives described speed reducing switch, reduce the transfer rate of conveying belt;
When the head of described belt arrives described fixed length switch, record the instantaneous position a during head arrival of described belt, and after end of record (EOR), improve the transfer rate of described conveying belt;
When the afterbody of belt arrives described speed reducing switch, again reduce the transfer rate of described conveying belt;
When the afterbody of described belt arrives described fixed length switch, record the instantaneous position b during afterbody arrival of described belt, and after end of record (EOR), again improve the transfer rate of described conveying belt;
The length of described belt is calculated according to described a and b;
The moment that the head of described belt arrives described speed reducing switch arrives the moment of described fixed length switch early than the head of described belt.
2. method according to claim 1, is characterized in that, the transfer rate of described reduction conveying belt specifically comprises: the transfer rate of described conveying belt is reduced to 5mm/s.
3. method according to claim 1, is characterized in that, the transfer rate of the described conveying belt of described raising specifically comprises: the transfer rate of described conveying belt is increased to 300mm/s.
4. method according to claim 1, is characterized in that, described speed reducing switch and described fixed length switch are being 1cm-5cm along the spacing on described conveying belt direction of transfer.
5. method according to claim 1, it is characterized in that, the described length calculating described belt according to described a and b comprises: the length calculating described belt according to formula L=b-a+c, and described c is the constant that machine error compensates, and described L represents the length of described belt.
6. method according to claim 5, is characterized in that, described c value is 4mm-8mm.
7. method according to claim 1, is characterized in that, the described length calculating described belt according to described a and b comprises: the length calculating described belt according to formula L=b-a.
8. a belt length-measuring appliance, is characterized in that, at least comprises speed reducing switch, fixed length switch and programmable logic controller (PLC) PLC;
Described speed reducing switch is used for, and when the head of belt or the afterbody of belt arrive, notifies that described PLC reduces the transfer rate of conveying belt;
Described fixed length switch is used for, when the head of described belt arrives, notify described PLC record described belt head arrive time instantaneous position a, and after end of record (EOR), notify that described PLC improves the transfer rate of described conveying belt, and when the afterbody of described belt arrives, notify the instantaneous position b when afterbody that described PLC records described belt arrives, and after end of record (EOR), notify that described PLC improves the transfer rate of described conveying belt;
Described PLC is used for, when the head of belt or the afterbody of belt arrive described speed reducing switch, reduce the transfer rate of described conveying belt, when the head of belt arrives described fixed length switch, record the instantaneous position a during head arrival of described belt, and after end of record (EOR), improve the transfer rate of described conveying belt, and when the afterbody of belt arrives described fixed length switch, record the instantaneous position b during afterbody arrival of described belt, and after end of record (EOR), improve the transfer rate of described conveying belt, the last length calculating described belt according to described a and b,
The moment that the head of described belt arrives described speed reducing switch arrives the moment of described fixed length switch early than the head of described belt.
9. device according to claim 8, is characterized in that, the described length calculating described belt according to described a and b comprises: the length calculating described belt according to formula L=b-a+c, and described c is the constant that machine error compensates.
10. device according to claim 9, is characterized in that, described c value is 4mm-8mm.
CN201210576426.2A 2012-12-25 2012-12-25 Belt length measurement method and device Active CN103075985B (en)

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CN104776803B (en) * 2015-04-13 2017-07-14 赛轮金宇集团股份有限公司 A kind of tyre surface examines growth device and its monitoring method automatically
CN105115463A (en) * 2015-09-25 2015-12-02 中国重型机械研究院股份公司 Non-contact on-line bar length measuring device and method
CN105387831B (en) * 2015-12-29 2017-10-20 浦林成山(山东)轮胎有限公司 A kind of tire belt device for detecting length

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CN202074955U (en) * 2011-03-30 2011-12-14 吴江德伊时装面料有限公司 Device capable of automatically measuring quantity and length of cloth
CN202592764U (en) * 2012-05-21 2012-12-12 萨驰华辰机械(苏州)有限公司 Automatic connector device of belt bundle layer

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