CA2092160A1 - Belt-like conveying and/or driving element - Google Patents
Belt-like conveying and/or driving elementInfo
- Publication number
- CA2092160A1 CA2092160A1 CA002092160A CA2092160A CA2092160A1 CA 2092160 A1 CA2092160 A1 CA 2092160A1 CA 002092160 A CA002092160 A CA 002092160A CA 2092160 A CA2092160 A CA 2092160A CA 2092160 A1 CA2092160 A1 CA 2092160A1
- Authority
- CA
- Canada
- Prior art keywords
- conveying
- belt
- driving element
- strand
- carrier
- 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
Links
- 239000004033 plastic Substances 0.000 claims abstract description 30
- 229920003023 plastic Polymers 0.000 claims abstract description 29
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 8
- 230000005415 magnetization Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 22
- 238000003466 welding Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 12
- 239000012815 thermoplastic material Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 230000005294 ferromagnetic effect Effects 0.000 claims description 3
- 229910000640 Fe alloy Inorganic materials 0.000 claims 1
- 229940090961 chromium dioxide Drugs 0.000 claims 1
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 claims 1
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 230000000977 initiatory effect Effects 0.000 abstract description 5
- 230000005291 magnetic effect Effects 0.000 description 16
- 239000000306 component Substances 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000001771 impaired effect Effects 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 206010059837 Adhesion Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
- -1 petrol Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D29/00—Producing belts or bands
- B29D29/06—Conveyor belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/34—Devices for discharging articles or materials from conveyor
- B65G47/46—Devices for discharging articles or materials from conveyor and distributing, e.g. automatically, to desired points
- B65G47/50—Devices for discharging articles or materials from conveyor and distributing, e.g. automatically, to desired points according to destination signals stored in separate systems
- B65G47/503—Devices for discharging articles or materials from conveyor and distributing, e.g. automatically, to desired points according to destination signals stored in separate systems the system comprising endless moving means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Belt Conveyors (AREA)
Abstract
ABSTRACT
BELT-LIKE CONVEYING AND/OR DRIVING ELEMENT
A description is given of a belt-like conveying and/or driving element (conveyor belt 1, toothed belt 7) with a component of ferromagnetic material (5) usable as a marking for initiating control processes and which is embedded in a strand-like, elastic plastic carrier (flat belt 6, round cord 3) and can be fixed to the belt-like conveying and/or driving element (conveyor belt 1, toothed belt 7). Thus, it is possible to input by magnetization control instructions on such conveying and/or driving elements, whereby said control instructions can be continuously modified. The conveying and/or driving elements then fulfil a control function in addition to the conveying or driving function. (cf. fig. 4)
BELT-LIKE CONVEYING AND/OR DRIVING ELEMENT
A description is given of a belt-like conveying and/or driving element (conveyor belt 1, toothed belt 7) with a component of ferromagnetic material (5) usable as a marking for initiating control processes and which is embedded in a strand-like, elastic plastic carrier (flat belt 6, round cord 3) and can be fixed to the belt-like conveying and/or driving element (conveyor belt 1, toothed belt 7). Thus, it is possible to input by magnetization control instructions on such conveying and/or driving elements, whereby said control instructions can be continuously modified. The conveying and/or driving elements then fulfil a control function in addition to the conveying or driving function. (cf. fig. 4)
Description
209216~
BELT-LIKE CONVEYING AND/OR DRIVING ELEMENT
_ _ _ _ .
DESCRIPTION
The invention relates to a belt-like conveying and/or driving element accor-ding to the preamble of claim 1.
For controlling the straight running of conveyor belts it is already kncwn to apply or embed markings made frcm another material (DE 37 11 916/C2). The markings are scanned or sensed by means of material selectively c~erating sensors of a control mechanism for the straight running of the conveyor belt.
If such markings are zonally arranged, it is also possible to achieve the --stopping of the belt at certain intervals or the merely stepwise movement thereof. As such materially selectively scannable markings are embedded in fixed manner in the conveyor belt, it is only possible to initiate these con-trol processes in a fixed predete~mined manner.
It is already known frcm DE-AS 27 41 788 to apply markings in the form of mag-netic spots to conveyor belts constructed as steel bands and which are magnet-izable. The magnetic spots influence reading heads located on the band or belt and in turn they initiate the operatic~n of discharge slides. The use of steel bands is limited to special fields of application. In additicn, strong magnetic fields are required for magnetizing the steels used for steel bands.
It is also knc~n frcm DE-C-7459 X/39a to prc,vide e.g. on rubber conveyor belts an edge protection, which is in particular applied to the edges in the form of - -a solution of polymers of acrylates or methacrylates or metacrylates to which -have c,ptionally been added fiIlers, pigments and dyes. Following the evapor-ation of the solvent a film is obtained, which offers protection e.g. against water, petrol, oil and grease. It is possible by means of additives to obtain particularly desired characteristics of the edge protection, e.g. randcm colouring.
According to German Utility Model 83 00 705 it is knc~n to provide a magnetic ,~
recording medium ccmprising a plastic film carrier with a magnetic coating on lts surface and which constantly decreases at the belt ends. According to the solution described smooth fading in and out of magnetization processes is --obtained.
It is kncwn from ~erman Utility Model 17 38 581 to provide on conveyor belts ~-..~. .
~.-'`' :
an edge protection made frcm a thermoplastlc materlal and which is constructed as a plastic profile. For fixing the edge protection it is possible to pro-vide in said plastic profile, e.g. a wire coil made frcm steel, plastic or scme other material. The use of materials with different strength character-istics is also described and it is optionally possible to incorporate cables, tubes and the like within said edge protection. However, all these measures serve to protect the belt edge.
The problem of the invention is to create a belt-like conveying and/or driving -~
element, which is repeatedly provided with a magnetic information, which is inexpensive to manufacture and can in problem-free manner be prc~ided with informatian variable at any time.
According to the invention this problem is solved by the features of claim 1.
The further develoement of the invention can be gathered frcm the subclaims.
It has been found that it is possible during an embedding of the component ccmprising a ferromagnetic material in a strand-like, elastic plastic carrier, to also subsequently permanently fix by welding or bonding the said component to a conveying and/or driving element in accordance with the demands made.
m e ccmponent can then be fixed to a random, readily scannable area of the conveying and/or driving element, without impairing its conveying and/or dri- -~
ving function. The embedding in the plastic carrier leads to the advantage that the materials to be joined can be so matched to one another that an ~-extremely hard wearing and durable fixing can be obtained.
A further advantage results frcm the fact that the elastic profile material can have its properties matched ~n such a way that the embedded, ferromagnetic component is protected against mechanical wear and that its elastic character-istics prevent a tearing or a detachment as a result of the stresses which occur. The arrangement in a plastic carrier also permits an accurate positio-ning of the ferrcmagnetic component, which is neces8ary for an operationally reli~ble magnet~7ation and scanning,by magnetic heads. The ferromagnetic com-ponent can be chosen e~clusively on the basis of an optimum signal input or recognition. The plastic carrier ensures the necessary mechanical character-istics.
If the ferromagnetic material ccmponent usable as a marking for initiating control processes is embedded in a plastic carrier made frcm a thermoplastic material, the camponent can be particularly durably fixed to the conveyor belt by weld mg. This more particularly applies if the conveying and/or driving element is at least partly made fram a thermoplastic material. In this case, a p æ ticularly good, hard wearing welded joint can be produced. The component can fundamentally be fixed to a randcm, readily scannable point of the con-veying and/or driving element, provided that its conveying and/or driving function is not impaired.
Preferably digital control instructions can be applied by magnetization to a ccmponent made frcm readily magnetizable ferrcmagnetic material. The magnetic markings can be read by means of scanning heads located on the conveying and/or driving element and pro~uce a signal which initiates a control process.
The m æ kings can be randamly frequently erased and reapplied.
The ferrcmagnetic material embedded in the plastic carrier is preferably a material formed frcm iron particles or iran alloy particles, iron oxide, chramium dioxide or other ferramagnetic oxides.
The belt-like conveying and/or driving elements are e.g. constructed asconveyor or toothed belts. The strand-like, elastic plastic carrier can e.g.
be constructed as a flat belt and is then preferably welded to fixed by bon-ding to the conveying side of the conveyor belt or the autside of the toothed ~- ~
belt. Particularly in the case of welding and with a corresponding surface ~ -design the flat belt is so adapted that the conveying characteristics are in no way impaired. However, the flat belt can also be welded or bonded to a lateral edge of the conveyor or toothed belt.
....
According to an embodiment of the invention the plastic carrier is constructed as a round cord or loop. If the round cord has a dia~eter, which corresponds to the total thickne~s, e.g. of a conveyor belt, then the said round cord can be welded to a cut edge of the conveyor belt and during welding the round cord side engaging on the cut edge is adapted to the shape of the latter and, ~-~
covering the latter, i~s joined in full-surface manner to the conveyor belt.
In this way it is ensured th~t the sh~pe or characteristics of the conveying :,' . ~`
or bearing faces of the conveyor belt are not impaired and at the ~ame time the cut edge is sealed by the round cord applied. In addition, there is a precise positioning of the marking, i.e. its precise a~sociation to the magnet-izing or scanning heads of the control mechanism located on the outer edge of the conveyor belt.
It is particularly simple with a lateral arrangement of the plastic carrier for the magnetizing or scanning heads to constantly engage on the auter edge, i.e. on the ferramagnetic camponent-containing flat belt or ralund cord and can follaw all the transverse movements of the auter edge, so that magnetization and scanning take place accompanied by constant contact, i.e. under optimum, constant conditions. Therefore a very high operational reliability is obtain-able. The magnetizing or scanning heads positioned in the vicinity of the auter edge of the conveyor belt in no way impair the conveying or driving function. The conve,ving faces remain free and cansequently dirtying of the magnetizing or scanning heads is largely avoided. -If the cut edges of e.g. a canveyor belt are bevelled prior to the welding an of the round cord, an increased contact surface for the round cord is obtained and ther~fo F a mechanlcally purticularly strongly loadable connection.
Preferably the plastic carrier has a lawer melting point than the thermo-plastic material of the canveying and/or driving element. If the plastic of the conveyor belt has a melting point of approximately 155C, then the melting ~ --point of the welded on plastic carrier is preferably approximately 145C. ~ -It is advantageous if the plastic carrier and the canveyor belt are made fram the same thenmoplastic materials with different melting points. They can e.g.
be polyurethanes. If the plastic carrier is to be fixed to a PVC conveying and/or driving element, it is advantageous to also make the plastic carrier fram PVC.
The plastic carrier is applied to the belt-like conveying and/or driving eleTent, in that both are continuausly brought together and welded accompanied by heating to the melting point in a welding apparatus. The conveying and/or driving element having ~he higher melting point is only heated to such an extent that in the vicinity of the contact faces a deformation occurs. The -` 2092160 plastic carrier having the lower melting point is simultaneously heated to such an extent that its side engaging on the conveyor belt is adapted to the latter during welding and is joined in full-surface manner thereto. In part-icular at the edges of a flat belt there is a complete welding without any transition, i.e. without an edge forming. It i6 also possible to obtain a com-plete covering of a cut edge of a conveyor belt.
This process also leads to the further advantage that the conveying and/or driving element, such as conveyor or toothed belts, in continuous or non-continuous form, to the extent that the conditions of use make it appear approp~iate, can be provided with a component usable as a marking for initi-ating control processes.
The conveying and/or driving element manufactured by means of conventional processes can be very rapidly provided with the plastic carrier containing the encodable coTponent, completely independently of its length and width. There ~-is no need to separately store the elements. Optionally they can be provided -without difficulty with the encodable component at the place of use. --~
As a result of the arrangement of the magnetizable component in a strand-like, elastic plastic carrier, it is possible to provide with a marking for initi- ~ -ating control processes conveying and/or driving elements produced on a plas-tic basis or fron elastoners. This e.g. makes it possible in the case of con~
veyor belts to input conLl~l instructions for deflecting the material flow.
With driving elements, such as e.g. toothed belts, it is possible by inputting readable signals to automatically give a control function thereto in addition to the driving function. This additional control function e.g. permits the positianing of the driven machine con,oonents. The magnetizable component additionally located on the toothed belt allows precise adjusting movements of - -said belt without it being necessary to use a stepping motor with its compli-cated control system. It is optionally also possible to replace mechanically coTplicated spindle drives.
: .
The invention is described in greater detail hereinafter relative to embodi-ments and the attached~drawings, wherein show:
- 209~160 Fig. 1 A conveyor belt, to whose cut edge is fixed a round cord in which is embedded a ferrcmagnetic material.
Fig. 2 A cross-section through a conveyor belt, to whose cut edge ls fixed a round cord, whose outer edge is defonmed in angular manner.
Fig. 3 A cross-section through a conveyor belt, to whose conveying side is fixed a flat belt, in which the ferrcmagnetic material is incorporated.
. - -Fig. 4 A conveyor belt in plan view as part of a packet distribution -~--mechanism.
Fig. 5 A toothed belt as part of a linear drive.
In fig. 1 the conveyor belt is designated 1 and a round cord or loc,p 3 is welded to its cut edge 2. The cut edge 2 is cut in sloping manner, so that n ~ -the contact surface with the round cord 3 is increased, as is the welded joint strength. The round cord 3 is made frcm a thermoplastic material in which is embedded a ferrcmagnetic filler 5 as a ccmponent usable as a marking for initiating control processes. The ferrcmagnetic filler 5 comprises iron or iron allcy particles, iron oxide, chrcmium dioxide or other ferrcmagnetic c~ides.
As both the conveyor belt 1 and the round cord 3 are made frcm thermoplastic material, it is possible to prcduce a high strength welded joint by means of a welding apparatus not shown in the drawings. If the thermoplastic material of the round card 3 has a lower melting point, a defonmation of said cord 3 is possible during the welding pracess. The round cord 3 then adapts to the shape of the cut edge without the conve~vor belt 1 being defonned. Thus, the running and conveying characteristics of the conveyor belt 1 are fully main-tained. An advantageous sealing of the cut edge 2 of the conveyor belt 1 is obtained ~s an additional effect.
Fig. 2 shows that thq~round cord 3 welded to the cut edge 2 of the cc,nveyor belt 1 can be deformed in such a way that an angular outer edge is obtained.
~ ~ 't.~ ~,.';"j ~ `~ ` ' s' ~ ~ `'~
`` 2092160 Such an outer edge can improve the accuracy of the magnetization and the scan-ning by the magnetic heads of a control mechanism.
In the case of the conveyor belt 1 shown in fig. 3, to its conveying side is fixed a flat belt, in which is incorporated a ferromagnetic material 5 as a ccmponent usable as a marking for initiating control processes. Preferably the flat belt 6 is made frcm a thermoplastic material and is welded to the conveyor belt 1. However, particularly in this embodiment a bonding or adhe-sion is also possible. -An arrangement of a flat belt 6 in accordance with the embodiment shown in fig. -~
3 is particularly suitable for driving belts, such as e.g. toothed belts 7. ~ -Such a toothed belt 7 is shc~n in fig. 5~ In this case it is advantageous to -place the flat belt 6 on the outside of the toothed belt 7, because there no material conveying takes place when used as a driving element. However, the -~
invention can obviously be used with very considerable advantage when the toothed belt 7 is used as a conveying element.
Preferably the conveyor belt 1 or the toothed belt 7 for the application of ~ ~
the round cord 3 or the flat belt 6 are supplied in continuous or non- -continuous fo~m to a welding apparatus not shown in the drawings. Simultan~
eously the round cord 3 or the flat belt 6 are supplied frcm a supply reel and -e.g. by means of a hot air nozzle the supplied material is heated and welded to the conveyor belt 1 or the toothed belt 7. A particularly gentle treatment -of the conveyor belt 1 or the toothed belt 7 is obtained if the strand-like ~-plastic carrier to be welded on has a lower melting point than the material of the conveyor belt 1 or the toothed belt 7. The welding te~perature is then chosen in such a way that the material of the conveyor belt 1 or the toothed belt 7 is merely premelted, but the material of the strand-like plastic car-rier ~s deformable and adapts to the surface or shape of the cut edge 2 of the - --conveying and/or driving element 1 and is intimately connected to the surface -or the cut edge 2.
.. . .
Fig. 4 shc)ws a packet distributing mechanism 8, the conveyor belt 1 being ~-visible in plan view. The conveyor belt 1 has a signal track 9, which is formed by a ferrcmagnetic filler 5 in¢orporated into the strand-like, elastic ;
- -plastic carrier. By means of a delivery chute 10 packetfl 11 are fed onto theconveyor belt 1. Simultaneously by means of the magnetic head 12 of the pac-ket distributing mechanism 8 arranged on the signal track 9 a marking is app-lied to the latter.
As soon as the marking applied to the signal track 9 passes further magnetic heads 12, the signal applied is read out and processed. In the case of corr-esponding infonnation the packet ll is discharged by a slide 13 onto a dis-charge chute 14. The design of the conveyor belt 1 according to the invention makes it possible to apply individual and also digital signals making it pos-sible to initiate specific processes precisely associated with each product conveyed.
Fig. 5 shows a linear drive 15, in which is located a toothed belt 7 as the driving element. On either side the toothed belt 7 is guided and reversed by means of a toothed disk 16 and 17~ As a function of control instructions frcm a control mechanism not shown in the drawings, a drive motor 18 drives the toothed disk 16 and therefore the toothed belt 7. The flat belt 6 containing the ferramagnetic material 5 is weJded onto the outside of the toothed belt 7.
The flat belt 6 constitutes a control track, which can be magnetized or read by means of magnetic heads 19 and 20 located on the toothed belt 7. To the toothed belt 7 is fixed a linearly movable connecting piece 21. To the connecting piece 21 of the linear drive 15 can be optionally fixed e.g.
grippers, suction devices, dosing heads, etc. Such a linear drive 15 has the advantage that the linear movements are predetermined bv the magnetic markings an the flat belt 6. The magnetic markings can be very easily and rapidly adapted to the particular conditions. In particular, there is no need to use a complicated stepping motor, because the necessary operating paths are dir-ctly predetenmined by the magnetic markings. Consequently there is no need for a stepping control mechanism.
The toothed belt 7 can be constructed as a finite toothed belt 7, whose ends are flxed to a basic body. In this casq the connecting plece moves ~n the toothed belt 7 and the magnetic heads are located on the connecting piece.
It i8 obvious that the ~trand-like, elastic plastic carrier for the ferro-magnetic material 5 in accordance with the invention can be located on all . ,:
209216 ~
types of conveying and/or driving elements, provided that the material charac-teristics allow a reliable fixing. The arrangement of the ferromagnetic material 5 in a plastic carrier makes it possible to adapt its material characteristics with respect to elasticity and abrasion re~istance to the part-icular requirements. Therefore account can be taken of the high mechanical stresses occurring, more particularly at reversing points, in the belt-like conveying and/or driving elements.
. ~ , .
BELT-LIKE CONVEYING AND/OR DRIVING ELEMENT
_ _ _ _ .
DESCRIPTION
The invention relates to a belt-like conveying and/or driving element accor-ding to the preamble of claim 1.
For controlling the straight running of conveyor belts it is already kncwn to apply or embed markings made frcm another material (DE 37 11 916/C2). The markings are scanned or sensed by means of material selectively c~erating sensors of a control mechanism for the straight running of the conveyor belt.
If such markings are zonally arranged, it is also possible to achieve the --stopping of the belt at certain intervals or the merely stepwise movement thereof. As such materially selectively scannable markings are embedded in fixed manner in the conveyor belt, it is only possible to initiate these con-trol processes in a fixed predete~mined manner.
It is already known frcm DE-AS 27 41 788 to apply markings in the form of mag-netic spots to conveyor belts constructed as steel bands and which are magnet-izable. The magnetic spots influence reading heads located on the band or belt and in turn they initiate the operatic~n of discharge slides. The use of steel bands is limited to special fields of application. In additicn, strong magnetic fields are required for magnetizing the steels used for steel bands.
It is also knc~n frcm DE-C-7459 X/39a to prc,vide e.g. on rubber conveyor belts an edge protection, which is in particular applied to the edges in the form of - -a solution of polymers of acrylates or methacrylates or metacrylates to which -have c,ptionally been added fiIlers, pigments and dyes. Following the evapor-ation of the solvent a film is obtained, which offers protection e.g. against water, petrol, oil and grease. It is possible by means of additives to obtain particularly desired characteristics of the edge protection, e.g. randcm colouring.
According to German Utility Model 83 00 705 it is knc~n to provide a magnetic ,~
recording medium ccmprising a plastic film carrier with a magnetic coating on lts surface and which constantly decreases at the belt ends. According to the solution described smooth fading in and out of magnetization processes is --obtained.
It is kncwn from ~erman Utility Model 17 38 581 to provide on conveyor belts ~-..~. .
~.-'`' :
an edge protection made frcm a thermoplastlc materlal and which is constructed as a plastic profile. For fixing the edge protection it is possible to pro-vide in said plastic profile, e.g. a wire coil made frcm steel, plastic or scme other material. The use of materials with different strength character-istics is also described and it is optionally possible to incorporate cables, tubes and the like within said edge protection. However, all these measures serve to protect the belt edge.
The problem of the invention is to create a belt-like conveying and/or driving -~
element, which is repeatedly provided with a magnetic information, which is inexpensive to manufacture and can in problem-free manner be prc~ided with informatian variable at any time.
According to the invention this problem is solved by the features of claim 1.
The further develoement of the invention can be gathered frcm the subclaims.
It has been found that it is possible during an embedding of the component ccmprising a ferromagnetic material in a strand-like, elastic plastic carrier, to also subsequently permanently fix by welding or bonding the said component to a conveying and/or driving element in accordance with the demands made.
m e ccmponent can then be fixed to a random, readily scannable area of the conveying and/or driving element, without impairing its conveying and/or dri- -~
ving function. The embedding in the plastic carrier leads to the advantage that the materials to be joined can be so matched to one another that an ~-extremely hard wearing and durable fixing can be obtained.
A further advantage results frcm the fact that the elastic profile material can have its properties matched ~n such a way that the embedded, ferromagnetic component is protected against mechanical wear and that its elastic character-istics prevent a tearing or a detachment as a result of the stresses which occur. The arrangement in a plastic carrier also permits an accurate positio-ning of the ferrcmagnetic component, which is neces8ary for an operationally reli~ble magnet~7ation and scanning,by magnetic heads. The ferromagnetic com-ponent can be chosen e~clusively on the basis of an optimum signal input or recognition. The plastic carrier ensures the necessary mechanical character-istics.
If the ferromagnetic material ccmponent usable as a marking for initiating control processes is embedded in a plastic carrier made frcm a thermoplastic material, the camponent can be particularly durably fixed to the conveyor belt by weld mg. This more particularly applies if the conveying and/or driving element is at least partly made fram a thermoplastic material. In this case, a p æ ticularly good, hard wearing welded joint can be produced. The component can fundamentally be fixed to a randcm, readily scannable point of the con-veying and/or driving element, provided that its conveying and/or driving function is not impaired.
Preferably digital control instructions can be applied by magnetization to a ccmponent made frcm readily magnetizable ferrcmagnetic material. The magnetic markings can be read by means of scanning heads located on the conveying and/or driving element and pro~uce a signal which initiates a control process.
The m æ kings can be randamly frequently erased and reapplied.
The ferrcmagnetic material embedded in the plastic carrier is preferably a material formed frcm iron particles or iran alloy particles, iron oxide, chramium dioxide or other ferramagnetic oxides.
The belt-like conveying and/or driving elements are e.g. constructed asconveyor or toothed belts. The strand-like, elastic plastic carrier can e.g.
be constructed as a flat belt and is then preferably welded to fixed by bon-ding to the conveying side of the conveyor belt or the autside of the toothed ~- ~
belt. Particularly in the case of welding and with a corresponding surface ~ -design the flat belt is so adapted that the conveying characteristics are in no way impaired. However, the flat belt can also be welded or bonded to a lateral edge of the conveyor or toothed belt.
....
According to an embodiment of the invention the plastic carrier is constructed as a round cord or loop. If the round cord has a dia~eter, which corresponds to the total thickne~s, e.g. of a conveyor belt, then the said round cord can be welded to a cut edge of the conveyor belt and during welding the round cord side engaging on the cut edge is adapted to the shape of the latter and, ~-~
covering the latter, i~s joined in full-surface manner to the conveyor belt.
In this way it is ensured th~t the sh~pe or characteristics of the conveying :,' . ~`
or bearing faces of the conveyor belt are not impaired and at the ~ame time the cut edge is sealed by the round cord applied. In addition, there is a precise positioning of the marking, i.e. its precise a~sociation to the magnet-izing or scanning heads of the control mechanism located on the outer edge of the conveyor belt.
It is particularly simple with a lateral arrangement of the plastic carrier for the magnetizing or scanning heads to constantly engage on the auter edge, i.e. on the ferramagnetic camponent-containing flat belt or ralund cord and can follaw all the transverse movements of the auter edge, so that magnetization and scanning take place accompanied by constant contact, i.e. under optimum, constant conditions. Therefore a very high operational reliability is obtain-able. The magnetizing or scanning heads positioned in the vicinity of the auter edge of the conveyor belt in no way impair the conveying or driving function. The conve,ving faces remain free and cansequently dirtying of the magnetizing or scanning heads is largely avoided. -If the cut edges of e.g. a canveyor belt are bevelled prior to the welding an of the round cord, an increased contact surface for the round cord is obtained and ther~fo F a mechanlcally purticularly strongly loadable connection.
Preferably the plastic carrier has a lawer melting point than the thermo-plastic material of the canveying and/or driving element. If the plastic of the conveyor belt has a melting point of approximately 155C, then the melting ~ --point of the welded on plastic carrier is preferably approximately 145C. ~ -It is advantageous if the plastic carrier and the canveyor belt are made fram the same thenmoplastic materials with different melting points. They can e.g.
be polyurethanes. If the plastic carrier is to be fixed to a PVC conveying and/or driving element, it is advantageous to also make the plastic carrier fram PVC.
The plastic carrier is applied to the belt-like conveying and/or driving eleTent, in that both are continuausly brought together and welded accompanied by heating to the melting point in a welding apparatus. The conveying and/or driving element having ~he higher melting point is only heated to such an extent that in the vicinity of the contact faces a deformation occurs. The -` 2092160 plastic carrier having the lower melting point is simultaneously heated to such an extent that its side engaging on the conveyor belt is adapted to the latter during welding and is joined in full-surface manner thereto. In part-icular at the edges of a flat belt there is a complete welding without any transition, i.e. without an edge forming. It i6 also possible to obtain a com-plete covering of a cut edge of a conveyor belt.
This process also leads to the further advantage that the conveying and/or driving element, such as conveyor or toothed belts, in continuous or non-continuous form, to the extent that the conditions of use make it appear approp~iate, can be provided with a component usable as a marking for initi-ating control processes.
The conveying and/or driving element manufactured by means of conventional processes can be very rapidly provided with the plastic carrier containing the encodable coTponent, completely independently of its length and width. There ~-is no need to separately store the elements. Optionally they can be provided -without difficulty with the encodable component at the place of use. --~
As a result of the arrangement of the magnetizable component in a strand-like, elastic plastic carrier, it is possible to provide with a marking for initi- ~ -ating control processes conveying and/or driving elements produced on a plas-tic basis or fron elastoners. This e.g. makes it possible in the case of con~
veyor belts to input conLl~l instructions for deflecting the material flow.
With driving elements, such as e.g. toothed belts, it is possible by inputting readable signals to automatically give a control function thereto in addition to the driving function. This additional control function e.g. permits the positianing of the driven machine con,oonents. The magnetizable component additionally located on the toothed belt allows precise adjusting movements of - -said belt without it being necessary to use a stepping motor with its compli-cated control system. It is optionally also possible to replace mechanically coTplicated spindle drives.
: .
The invention is described in greater detail hereinafter relative to embodi-ments and the attached~drawings, wherein show:
- 209~160 Fig. 1 A conveyor belt, to whose cut edge is fixed a round cord in which is embedded a ferrcmagnetic material.
Fig. 2 A cross-section through a conveyor belt, to whose cut edge ls fixed a round cord, whose outer edge is defonmed in angular manner.
Fig. 3 A cross-section through a conveyor belt, to whose conveying side is fixed a flat belt, in which the ferrcmagnetic material is incorporated.
. - -Fig. 4 A conveyor belt in plan view as part of a packet distribution -~--mechanism.
Fig. 5 A toothed belt as part of a linear drive.
In fig. 1 the conveyor belt is designated 1 and a round cord or loc,p 3 is welded to its cut edge 2. The cut edge 2 is cut in sloping manner, so that n ~ -the contact surface with the round cord 3 is increased, as is the welded joint strength. The round cord 3 is made frcm a thermoplastic material in which is embedded a ferrcmagnetic filler 5 as a ccmponent usable as a marking for initiating control processes. The ferrcmagnetic filler 5 comprises iron or iron allcy particles, iron oxide, chrcmium dioxide or other ferrcmagnetic c~ides.
As both the conveyor belt 1 and the round cord 3 are made frcm thermoplastic material, it is possible to prcduce a high strength welded joint by means of a welding apparatus not shown in the drawings. If the thermoplastic material of the round card 3 has a lower melting point, a defonmation of said cord 3 is possible during the welding pracess. The round cord 3 then adapts to the shape of the cut edge without the conve~vor belt 1 being defonned. Thus, the running and conveying characteristics of the conveyor belt 1 are fully main-tained. An advantageous sealing of the cut edge 2 of the conveyor belt 1 is obtained ~s an additional effect.
Fig. 2 shows that thq~round cord 3 welded to the cut edge 2 of the cc,nveyor belt 1 can be deformed in such a way that an angular outer edge is obtained.
~ ~ 't.~ ~,.';"j ~ `~ ` ' s' ~ ~ `'~
`` 2092160 Such an outer edge can improve the accuracy of the magnetization and the scan-ning by the magnetic heads of a control mechanism.
In the case of the conveyor belt 1 shown in fig. 3, to its conveying side is fixed a flat belt, in which is incorporated a ferromagnetic material 5 as a ccmponent usable as a marking for initiating control processes. Preferably the flat belt 6 is made frcm a thermoplastic material and is welded to the conveyor belt 1. However, particularly in this embodiment a bonding or adhe-sion is also possible. -An arrangement of a flat belt 6 in accordance with the embodiment shown in fig. -~
3 is particularly suitable for driving belts, such as e.g. toothed belts 7. ~ -Such a toothed belt 7 is shc~n in fig. 5~ In this case it is advantageous to -place the flat belt 6 on the outside of the toothed belt 7, because there no material conveying takes place when used as a driving element. However, the -~
invention can obviously be used with very considerable advantage when the toothed belt 7 is used as a conveying element.
Preferably the conveyor belt 1 or the toothed belt 7 for the application of ~ ~
the round cord 3 or the flat belt 6 are supplied in continuous or non- -continuous fo~m to a welding apparatus not shown in the drawings. Simultan~
eously the round cord 3 or the flat belt 6 are supplied frcm a supply reel and -e.g. by means of a hot air nozzle the supplied material is heated and welded to the conveyor belt 1 or the toothed belt 7. A particularly gentle treatment -of the conveyor belt 1 or the toothed belt 7 is obtained if the strand-like ~-plastic carrier to be welded on has a lower melting point than the material of the conveyor belt 1 or the toothed belt 7. The welding te~perature is then chosen in such a way that the material of the conveyor belt 1 or the toothed belt 7 is merely premelted, but the material of the strand-like plastic car-rier ~s deformable and adapts to the surface or shape of the cut edge 2 of the - --conveying and/or driving element 1 and is intimately connected to the surface -or the cut edge 2.
.. . .
Fig. 4 shc)ws a packet distributing mechanism 8, the conveyor belt 1 being ~-visible in plan view. The conveyor belt 1 has a signal track 9, which is formed by a ferrcmagnetic filler 5 in¢orporated into the strand-like, elastic ;
- -plastic carrier. By means of a delivery chute 10 packetfl 11 are fed onto theconveyor belt 1. Simultaneously by means of the magnetic head 12 of the pac-ket distributing mechanism 8 arranged on the signal track 9 a marking is app-lied to the latter.
As soon as the marking applied to the signal track 9 passes further magnetic heads 12, the signal applied is read out and processed. In the case of corr-esponding infonnation the packet ll is discharged by a slide 13 onto a dis-charge chute 14. The design of the conveyor belt 1 according to the invention makes it possible to apply individual and also digital signals making it pos-sible to initiate specific processes precisely associated with each product conveyed.
Fig. 5 shows a linear drive 15, in which is located a toothed belt 7 as the driving element. On either side the toothed belt 7 is guided and reversed by means of a toothed disk 16 and 17~ As a function of control instructions frcm a control mechanism not shown in the drawings, a drive motor 18 drives the toothed disk 16 and therefore the toothed belt 7. The flat belt 6 containing the ferramagnetic material 5 is weJded onto the outside of the toothed belt 7.
The flat belt 6 constitutes a control track, which can be magnetized or read by means of magnetic heads 19 and 20 located on the toothed belt 7. To the toothed belt 7 is fixed a linearly movable connecting piece 21. To the connecting piece 21 of the linear drive 15 can be optionally fixed e.g.
grippers, suction devices, dosing heads, etc. Such a linear drive 15 has the advantage that the linear movements are predetermined bv the magnetic markings an the flat belt 6. The magnetic markings can be very easily and rapidly adapted to the particular conditions. In particular, there is no need to use a complicated stepping motor, because the necessary operating paths are dir-ctly predetenmined by the magnetic markings. Consequently there is no need for a stepping control mechanism.
The toothed belt 7 can be constructed as a finite toothed belt 7, whose ends are flxed to a basic body. In this casq the connecting plece moves ~n the toothed belt 7 and the magnetic heads are located on the connecting piece.
It i8 obvious that the ~trand-like, elastic plastic carrier for the ferro-magnetic material 5 in accordance with the invention can be located on all . ,:
209216 ~
types of conveying and/or driving elements, provided that the material charac-teristics allow a reliable fixing. The arrangement of the ferromagnetic material 5 in a plastic carrier makes it possible to adapt its material characteristics with respect to elasticity and abrasion re~istance to the part-icular requirements. Therefore account can be taken of the high mechanical stresses occurring, more particularly at reversing points, in the belt-like conveying and/or driving elements.
. ~ , .
Claims (10)
1. Belt-like conveying and/or driving element (1) with a ferromagnetic mat-erial (5), which contains information to be applied by magnetization, charac-terized in that the ferromagnetic material (5) is embedded as a filler in a strand-like carrier (3, 6) comprising an elastic, thermoplastic material and which is welded or bonded to the conveying and/or driving element (1) and is made from particles of iron, or an iron alloy, or iron oxide, or chromium dioxide, or ferromagnetic oxides.
2. Belt-like conveying and/or driving element (1) according to claim 1, characterized in that the strand-like carrier is a flat belt (6) or a round cord (3).
3. Belt-like conveying and/or driving element (1) according to claims 1 and 2, characterized in that the thermoplastic material of the carrier (3, 6) has a lower melting point than the thermoplastic material of the conveying and/or driving element (1), which is in particular constructed as a toothed belt (7).
4. Belt-like conveying and/or driving element (1) according to claims 1 or 3, characterized in that the strand-like carrier and the conveying and/or driving element (1) are made from the same material.
5. Belt-like conveying and/or driving element (1) according to claims 1 to 4, characterized in that the melting point of the conveying and/or driving element (1) is 155°C and that of the strand-like plastic 145°C.
6. Belt-like conveying and/or driving element (1) according to one or more of the claims 1 to 4, characterized in that the strand-like carrier is made from PVC with a melting point of 120°C.
7. Belt-like conveying and/or driving element (1) according to one or more of the claims 1 to 6, characterized in that the cut edges (2) of the conveying and/or driving element (1) are bevelled for enlarging the contact face.
8. Belt-like conveying and/or driving element (1) according to one or more of the claims 1 to 7, characterized in that the diameter of the round cord (3) corresponds to the total thickness of the conveying and/or driving element (1).
9. Belt-like conveying and/or driving element (1) according to one or more of the claims 1 to 8, characterized in that the round cord (3) completely covers the cut edge (2) following welding.
10. Belt-like conveying and/or driving element (1) according to one or more of the claims 1 to 9, characterized in that the contact face of the conveying and/or driving element (1) is not deformed during welding or bonding.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP93103258A EP0613843B1 (en) | 1991-11-30 | 1993-03-02 | Belt-like conveyor and/or transmission element |
| CA002092160A CA2092160A1 (en) | 1991-11-30 | 1993-03-22 | Belt-like conveying and/or driving element |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4139524A DE4139524A1 (en) | 1991-10-18 | 1991-11-30 | Conveyor belt or driving belt with precisely controlled movements - comprises plastic belt with a strip of plastic welded on contg. magnetic particles to act as a markers for control processes |
| EP93103258A EP0613843B1 (en) | 1991-11-30 | 1993-03-02 | Belt-like conveyor and/or transmission element |
| CA002092160A CA2092160A1 (en) | 1991-11-30 | 1993-03-22 | Belt-like conveying and/or driving element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2092160A1 true CA2092160A1 (en) | 1994-09-23 |
Family
ID=27169388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002092160A Abandoned CA2092160A1 (en) | 1991-11-30 | 1993-03-22 | Belt-like conveying and/or driving element |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0613843B1 (en) |
| CA (1) | CA2092160A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10273086B2 (en) | 2015-03-18 | 2019-04-30 | Habasit Ag | Conveyor belt having magnetic linear encoder readable markers |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011056255A1 (en) * | 2011-12-12 | 2013-06-13 | Phoenix Conveyor Belt Systems Gmbh | Conveyor belt, in particular steel cable conveyor belt, with bevelled flanks |
| SE1750051A1 (en) | 2017-01-20 | 2018-07-21 | Packsize Llc | A belt conveyor and system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2869878A (en) * | 1951-02-09 | 1959-01-20 | Armour Res Found | Sound motion picture film |
| US3486607A (en) * | 1967-08-08 | 1969-12-30 | Goodyear Tire & Rubber | Belt structure |
| DE2059612A1 (en) * | 1969-12-03 | 1971-06-09 | Dunlop Co Ltd | Belt with load location detectors |
| DE4121572C1 (en) * | 1991-06-29 | 1992-12-03 | Fa. Ernst Siegling, 3000 Hannover, De |
-
1993
- 1993-03-02 EP EP93103258A patent/EP0613843B1/en not_active Expired - Lifetime
- 1993-03-22 CA CA002092160A patent/CA2092160A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10273086B2 (en) | 2015-03-18 | 2019-04-30 | Habasit Ag | Conveyor belt having magnetic linear encoder readable markers |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0613843B1 (en) | 1996-05-29 |
| EP0613843A1 (en) | 1994-09-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |