CN1141228A

CN1141228A - Method for cutting belt with reinforced inlay and cutting equipment thereof

Info

Publication number: CN1141228A
Application number: CN96101899A
Authority: CN
Inventors: 埃廷内·埃柯克
Original assignee: Wagener Schwelm GmbH and Co
Current assignee: Wagener Schwelm GmbH and Co
Priority date: 1995-03-15
Filing date: 1996-03-13
Publication date: 1997-01-29
Also published as: PL313206A1; RU2159177C2; CZ288169B6; EP0732179B1; ZA962086B; GR3031676T3; FR2731645B1; EP0732179A1; PL180263B1; ES2136334T3; CZ61596A3; AU688669B2; CA2171799A1; DE59602509D1; FR2731645A1; AU4805596A

Abstract

In a method for cutting belts that incorporate reinforcing inserts, in particular, for cutting conveyor belts that are of an armored elastomer, the belt (41) is first arranged between two clamping jaws, before the clamping jaws are pressed against in order that the cut can be made; at the same time, a cutter (17) is guided along the clamping jaws and transversely to the longitudinal direction of the belt and through the material from which the belt is made, by means of a drive system. During the cut cutting process, the material from which the belt is made is cut on both sides by cutting edges (36, 37) of the cutter (17). The cutting edges (36, 37) subtend an acute angle and each cutting edge is either straight or curved convexly towards the belt (38). Also proposed is a cutter for the armored bulkheads referred to.

Description

Be cut with the method for the band that strengthens insert and the cutting equipment that is used for this type of band

The present invention relates to a kind of band that strengthens insert that is cut with, especially cut method with the conveyer belt that strengthens the elasticity system, wherein, band is placed between two clamping claws, and, in order to cut, clamping claw and the band that is contained between them are pressed against each other, and meanwhile, blade is by means of a drive unit, along clamping claw and vertical transverse to what be with, the material that passes band moves.

The invention still further relates to a kind of band that is used to have the enhancing insert, be particularly useful for by the cutting equipment that strengthens the conveyer belt that elastomer makes, the clamping device that the clamping claw that it is provided with transverse to band by two by and position can compress mutually in the middle of band is put into it is formed, and, a blade that has a blade at least by using drive unit to move along clamping device is arranged.

The method of the above-mentioned type and cutting equipment have been done introduction in the utility model certificate 2458497 of France.A kind of related can be the elastic webbing that the braid over braid of rubber coating is arranged, along horizontal cutting, be split into the silver of a rule by repeatedly, these silvers can be used to make the fabric enhancement Layer of tire later on., with this band as raw material, be clamped between two clamping claws that can compress mutually, then, the material that passes band with a blade that can move horizontally moves for this reason.Band is placed on the rubber conveyer belt.Also shredded for fear of this conveyer belt, be provided with the blade lower limb of two sickleshaped blades, the exhibition section of crowned rounding is arranged by blade.In cutting process, this protuberance presses down flexible conveyer belt part, is pressed in the sipes of bottom clamping claw, so can not injure conveyer belt in cutting process.Blade is rigidly fixed on the balladeur train that accurately moves along the top clamping claw.The cutting-height of blade is adjusted into, the limit of the band that cut, in cutting process along the protuberance upside, and thereby the protuberance and the sickleshaped blade between transition region in slide.

The fabric that this known cutting equipment can be used for cutting fabric and especially also is used to cut rubber coating.Otherwise it is not suitable for cutting the conveyer belt that is designed to high load capacity, and the conveyer belt that strengthens with steel wire especially for example is used for the conveyer belt that open-air and underground mining transports coal and overburden.

Conveyer belt with steel wire or braided steel wire thing strengthen also mainly cuts at present by hand, because suitable machine and mechanical method can not be provided.For this reason, usually at first with reinforce around elastomer cut off from both sides with dark as far as possible wedge shape.Then, by means of the manual operating abrasive wheel cutting machine of selling on the market, by the disconnected steel wire of undercut.At least need 3 people in order to finish this work exactly, and very hardships and cause huge noise, produce a large amount of dust.In addition, when utilizing abrasive machine work, can not prevent that the abrasive cut-off wheel dish from relating to elastomeric material, therefore, this work also additionally produces smog and unpleasant stink is bothered.The cutting of carrying out with this traditional method for the conveyer belt that 2 meters wide steel wires strengthen, needs to continue half an hour to 1 hour.Cut off once if just will be with, for example in order to repair, so so perhaps Chang time can also stand.But if what relate to is a complete disabled conveyer belt, and its processing intent is to be chopped into short one by one section, as in the future since more and more stricter Law on Environmental Protection desired, so this traditional method is not worth mentioning.

Purpose of the present invention proposes a kind of cutting method, can cut all kinds in this way apace and have band that strengthens insert and the band that especially strengthens with steel wire, and can make the cutter that adopted have long service life.For this reason, also should make a kind of suitable cutting equipment.

For achieving the above object, about the suggestion of method aspect, in cutting process, the blade of material two side blades of band is bitten, and constitutes an acute angle between the blade of blade, and respectively makes linear, or make the curved shape that protrudes towards the direction of band.The material that blade passes band with preferably having obvious down suction moves, and at this moment, blade is automatically felt relieved with respect to the enhancing insert that is included in the band.

In addition, advised also that for achieving the above object a kind of this paper starts the cutting equipment of described type, wherein, the curved shape that blade is made straight line or protruded towards the direction of band is provided with another blade with this blade with acutangulating, and, in cutting process, band is between these two blades.

Because two cooperative blades are essentially the structure of V-arrangement, so even also can cut unusually apace having the band that steel wire strengthens, and can make the blade of blade that arranged long service life.Cut about 2 meters wide rubber strips that have steel wire to strengthen, can within 2 minutes, finish, and do not produce dust and have only little noise.When implementing the method, need one at most and keep an eye on personnel.

According to a kind of design of the best, two blades of cutting equipment are located on the blade.In this case, two blades are symmetrical arranged mutually, and they have constituted the edge of a knife that is approximately V-arrangement jointly.This moulding of the edge of a knife can cause blade with respect to the enhancing insert self-centering that is included in the band.Therefore, maximum cutting force just in time concentrates on the place that need overcome maximum material resistance, that is the location of the reinforce that will cut off.

For blade can be felt relieved with respect to reinforce, blade can have a tangible gap along the flat side surface direction perpendicular to band, otherwise, should be in the state that rigidly fixes basically along vertical blade of being with.

Advise also that according to the present invention blade is contained on the balladeur train that can move around along clamping device.In order to make blade that the compensation of desirable gap can be arranged in this case, blade can be rigidly fixed on the balladeur train, balladeur train then has ground, tangible down suction and moves on one of two clamping claws of clamping device.

In addition, as if the place that the motion tractive force of balladeur train is acted on as close as possible blade, then be a kind of favourable design.For this reason, by design recommendation of the present invention, on balladeur train, deviate from the longitudinal side of blade and establish supporting rollern, they can roll on the guiding face of the clamping claw that balladeur train is housed, and, be provided with draw-gear for balladeur train is moved, they are fixed in balladeur train 1/2nd height that face blade on the balladeur train.

In order to prevent blade side to dodging, clamping claw can be established the axial clearance, and blade passes this gap.In this case, the guiding of the side of blade all or is partly undertaken by this axial clearance.

In order in conveying equipment, reality to use this cutting equipment, be preferably designed as and can clamping claw turned round mutually by means of rotary gemel, and, comprise that the cutting equipment of clamping claw can be opened fully at that end that it deviates from rotary gemel.So that will be with from the one thruster to go between open clamping claw.Can decompose whole cutting equipment in this way, carry out cutting work on the spot, for example eligible for repair conveyer belt in the belt conveyer frame be cut.For ease of transporting this cutting equipment, can on cutting equipment, establish suspension ring, so this cutting equipment can entirely lift by crane with portal jib crane or other transporting equipments, transport the place that needs use to, maybe can swing in the belt conveyer frame and use.

By means of embodiment and referring to accompanying drawing, illustrate other characteristics and advantage below.In the accompanying drawing:

Fig. 1: schematically illustrate the elastomeric cutting equipment front view that is used to cut with the steel wire enhancing;

Fig. 2: by the vertical view of cutting equipment shown in Figure 1;

Fig. 3:,, wherein a part of removed in order to see clearlyer by cutting equipment perspective view illustrated in figures 1 and 2;

Fig. 4: Fig. 1 planar I V-IV midship section detail drawing;

Fig. 5: the ratio that usefulness is amplified is the detail drawing of presentation graphs 4 once more;

Among the plane VI-VI of Fig. 6: Fig. 5, with the balladeur train Section View of blade fixed thereon;

Fig. 7: in second kind of form of implementation of cutting equipment with Fig. 5 corresponding view;

Fig. 8: in the third form of implementation of cutting equipment with Fig. 3 corresponding view;

Figure 10: the cutting equipment details of pressing Fig. 9;

Figure 11: the amplification drawing in side sectional elevation that passes through cutting equipment in the blade location; And

Figure 12: the cutaway view among Figure 11 plane X II-XII.

Referring to Fig. 1 to Fig. 4, for implementing the equipment that cutting method adopted a fixing substructure 1 is arranged, be provided with two pillars 2 in its outer end.The U-shaped section bar 8 of two levels is opposite each other, and as shown in Figure 4, they have constituted the clamping claw 10 that forms a cavity top, inner, and two section bars of this of clamping claw 10 firmly connect by segmental support 9.Movable framework 1 ' is mounted to and can vertically slides on substructure 1.Movable framework comprises the U-shaped section bar 3 of a pair of level, and they and constitute the flute profile clamping claw 13 of bottom opposite one another in this way.Two pairs of vertical support frames 4 are contained near the end of this bottom clamping claw 13, and they couple together with crossbeam 5 distolateral.In addition also be provided with the longitudinal carrier 6 of two levels, many rollers that are parallel to each other 7 are housed between two longitudinal carriers 6, so that form a horizontal supporting face that is used for wanting cutting belt in this way.In the upper end of vertical support frame 4, they connect by supporting 4 ' in couples.Each supports the 4 ' effect that is subjected to a double-action type cylinder 12, and its axle links to each other with a segmental support 9, and this segmental support 9 is contained on the top clamping claw 10 and between support 4.Cylinder 12 can pass through hydraulic pressure or air-operated control.They can work asynchronously, so that make movable clamping claw 13 up or down, therefore, this clamping claw 13 and fixing clamping claw 10 keeping parallelisms in top.Fixing section bar 8 and can move both vertically stay 4 between establish displacement guide member 15.This member can have guiding device, and they are expression in the drawings not.

The upper flange 14 of section bar 3 has constituted the clamping area of bottom clamping claw 13, and they are in almost and contour place, roller 7 surfaces.As shown in Figure 5, flange 14 usefulness gaps 16 separate, and blade 17 can slide by gap 16.The lower flange 18 of section bar 8 has constituted the clamping area of top clamping claw 10, and by gap 19 separately, gap 19 can make blade 17 pass equally for they.

Flange 14 opposite one another and 18 and thereon clamping area of system is expressed as flat in the drawings.But they also can have protuberantia or additionally be configured as profile of tooth pawl, prismatic pawl etc., so that can fix the band that will cut better, especially when this band is with the big material manufacturing of elasticity and has demonstrated obvious visible wearing and tearing sign.

Constitute top and fix to clamp in two section bars 8 of jaw 10, the cutting tool of being made up of the balladeur train 20 and the chain drive 21 of band blade 17 is housed, chain is by 22,23 operations of two sprocket wheels, and these two sprocket wheels are contained in the end of section bar 8.Sprocket wheel 22 is driven by driving motor 24.Another sprocket wheel 23 is contained on the chain stretching device 25, near each section bar 8 the chain stretching device 25, a side opening 26 is arranged, and it makes the installation and removal of blade 17 on balladeur train 20 be easy to carry out.Be contained in a removable shell 27 above the bottom clamping claw 13, be used for protecting the blade 17 in this zone.Another shell 28 protections are used to drive the chain of balladeur train 20.

Represented balladeur train 20 among Fig. 5 and 6, it mainly is made up of two blocks of side plates 30, and blade 17 is between this two boards 30.The chain termination is fixed on the end of two boards 30.Balladeur train moves in section bar 8 by means of the ball bearing 33 as roller.In this case, the external diameter of each ball bearing so that make balladeur train 20 and blade 17 that a vertical free gap 34 be arranged, and allows blade 17 with respect to the band self-centering that will cut less than the clear height in section bar 8 inside, also will introduce this back.The screw of plate 30 and blade 17 usefulness levels is connected to each other, and screw passes set hole.

Represent that in Fig. 6 each end of blade 17 all is provided with the edge of a knife, edge of a knife shape longitudinally is substantially V-shaped, it have two opposite one another

straight line portion

36,37, these two parts are toward each other in horizontal center line 38 symmetries.Each V-arrangement edge of a knife terminates in the central fovea section 39.Blade 17 the most handy high-speed steel manufacturings are cut this high-speed steel by means of laser instrument.The product that will cut is depended in the processing at the edge of a knife and cutting angle.Usually make micro-sharpening, make the edge of a knife not undermined too easily.This structure allows to make thin blade 17, but it can cut rubber or also cutting metal reinforce and other are put into the material of rubber.Two edge of a knife parts 36 of this of blade and 37 symmetrical structure can make blade 17 with respect to the member self-centering that will cut, and the member that is cut is fixed between two clamping claws 10,13.In the illustrated case, balladeur train 20 has vertical gap in top clamping claw 10, and it allows self-centering.

This gap also can obtain by blade 17 is contained on the balladeur train 20 versatilely.When cutting, blade moves transverse to band and by

gap

16 and 19, and

gap

16 and 19 is between two

clamping claws

10,13 of upper and lower.

Because blade 17 has two tool setting

notch portion

36,37, so allow alternately in case of necessity along a direction with then along another direction cutting.But this blade is also favourable under the situation of not planning to cut by the mode of taking turns, because when an edge of a knife becomes enough blunt, turning operative orientation is also changed to another edge of a knife and cut.

Fig. 7 and 8 expressions and Fig. 1 to 6 are in a ratio of a kind of blade mobile device of remodeling, are used to cut thick especially band, and this band strengthens with very thick steel wire.Blade 50 is main members of balladeur train 51, at this moment, an axle 52 with the sliding bearing 53 of two ball bearings is housed in the top clamping claw 10.In bottom clamping claw 13, an axle 54 with the sliding bearing 55 of two ball bearings is housed.Blade 50 has linearity blade 50 ', and the trend of blade 50 ' favours cut direction.Blade 50 the most handy high-speed steel manufacturings.Can establish fixing blade 56 on the flange 14 of bottom clamping claw 13, they are made with high-speed steel equally.Blade 56 has two blades 56 ' in 16 both sides, gap of bottom clamping claw 13.In case blade 50 has run into resistance in cutting process, it will remain on a position, and the sliding bearing 53 of balladeur train 51 is pressed to the upper flange of section bar 8 under this position, and meanwhile, sliding bearing 55 is pressed in flange 14 back sides of section bar 3.In this position, blade 50 ' applies a power in being with of will cutting, and the part of cut belt is arrived above the bottom clamping claw 13, and attempts to break the inner wire of the band that will cut between the blade 56 ' of the blade 50 ' of blade 50 and blade 56.In a kind of remodeling, can also make blade 50 contain such edge of a knife, that is, form one and the corresponding V-arrangement edge of a knife of the foregoing description.

The enforcement of the method is very simple, and the ground automation of can having no problem.Corresponding commanding apparatus is installed in the control cabinet 40, wherein comprises the supply unit of electric controling assembly and driving motor 24, in addition, handles the electric roll extrusion of cylinder 12 or the assembly of electro-pneumatic in addition.

That has represented among Fig. 3 to cut is with 41, and what relate to for example is a kind of rubber conveyer belt that strengthens with steel wire or wire 42 with 41, and it must be laterally along 43 cuttings of a line of cut.Be placed on and be with 41 on the roller 7, before the beginning cutting technique, can manually between clamping

claw

10 and 13, move by the operator.The old conveyer belt of damaging promptly can be broken into the fritter of being convenient to handle with the method.

When with 41 after being in the tram of desired line of cut 43 between the

clamping claw

10,13, at first handle cylinder 12, clamping

claw

10,13 is compressed mutually.Then, at first at the blade 17 at clamping

claw

10,13 1 end places, begin to carry out the motion that causes by drive unit.Because two blades of blade are arranged to acute angle mutually,, that is to say that blade 17 is with respect to being with 41 automatically to center so in cutting process, be with 41 to be between these two blades.In this case, the both sides of carrying material are bitten by the blade of blade 17, so can carry out symmetry and strong especially cutting, even if the band that has metal to strengthen also can have difficultly are not cut open.

Represented the another kind of form of implementation of cutting equipment among Fig. 9 and 12.Clamping

claw

10,13 connects by rotary gemel 60 at their end.Can to push between the

clamping claw

10,13 that the jaw shape opens from opposite side in order making with 41, to comprise the cutting equipment of

clamping claw

10,13, can open fully at that end 61 to rotary gemel 60.For this reason, as seen from Figure 10, after unclamping safety bolt 63, the piston rod 62 that is contained in the cylinder 12 at this place can leave bottom clamping claw 13.Then, bottom clamping claw 13 descends with respect to top clamping claw 10, thereby can will be with 41 to push from the side or extract out by around hinge 60 revolutions.When repairing circulating conveyer belt, because this band can not insert cutting equipment from the termination, so this structure is very favorable in this case.At that end of the clamping device that is provided with rotary gemel 60, fixed the backstop 64 that can change between two

clamping claws

10,13, can limit clamping

claw

10,13 maximum open-angles with it.

Suspension ring 65 can be contained in above the cutting equipment, cutting equipment can be hung toward desired place to use by means of crane, and can cut the position after rising where necessary.Replace suspension ring 65 or except that them, also can be provided for the prong of fork truck or the guiding device of other transporting equipment.

In the form of implementation of Figure 11 and 12 represented clamping

claw

10,13, balladeur train 20 and blades 17, each of two

clamping claws

10,13 is made up of two double T shape supports that be arranged in parallel.Above this a pair of support constitute top clamping claw 10, a pair of support of following this constitutes bottom clamping claw 13.Adopt suitable spacing part, the little blade 17 that just in time reaches to its left

axial clearance

16,19 of spacing of support is passed through.In this case, the guiding of blade 17 is mainly undertaken by the edge in gap 16,19.This guiding device is so tight, to cause the state that vertically basically be in rigidity of blade 17 along band.

Otherwise blade 17 is along perpendicular to the direction with 41 side planes 66 a tangible gap 34 being arranged.This gap 34 is pressed shown in Figure 12 by upper gap 34 ' and underclearance 34 " form.The clamping claw 10 that upper gap 34 ' is present in the supporting rollern 67 in the longitudinal side district, balladeur train 20 top and balladeur train is housed is provided with between the guiding face 68 in this place.Underclearance 34 " be present between balladeur train 20 downsides 69 and clamping claw 10 the flange 18 there.Chain type driving device 21 is fixed near balladeur train 20 downsides 69 by bolt 69 ', so as to accomplish with driving force import into blade 17 near.

Because the gap of balladeur train 20, thus with balladeur train 20 rigidly connected blades 17, can be vertically with respect to 41 or insert steel wire and wire 42 self-centerings in the band.Therefore, when cutting, steel wire arrives among recessed section 39 that sharpens exactly, and the blade of sharpening 70,71 of two symmetries of this of blade is joined at this place.Blade 70,71 the distance here is less than the diameter of the wire 42 that cuts off.In embodiment shown in Figure 12, V-arrangement and thereby be mutually the blade 70,71 that acute angle arranges and respectively make linear.But also can regulation blade the 70, the 71st, towards the profile that slightly protrudes with 41 direction, for example have parabolical profile.In this case, blade 70,71 has more and more littler acute angle along the direction of going at the edge of a knife end recessed section 39 there.Average angle between blade 70,71 still should be minimum 10 °, maximum 45 ° in this case.

It is own to replace sharpening blade 17, also can the blade sickle sword that be suitable for be installed again, for example the blade sickle sword made from widia steel or pottery on these matrixes with insert design as matrix.In this case, after the blade rust, do not need removal of inserts or even balladeur train.On the contrary, need only change blade sickle sword this moment.

For making clamping

claw

10,13 uniform pressure be arranged along its total length, can adopt suitable sag curve indemnifying measure, for example the recessed mutually prebuckling that goes out is arranged by two clamping

claws

10,13 of accurately determining.

Symbol table

1 substructure

1 ' framework

2 pillars

3 U-shaped section bars

4 supports

4 ' supports

5 crossbeams

6 longitudinal carriers

7 rollers

8 U-shaped section bars

9 segmental supports

10 top clamping claws

12 cylinders

13 bottom clamping claws

14 flanges

16 gaps

17 blades

18 flanges

19 gaps

20 balladeur trains

21 drive units

22 sprocket wheels

23 sprocket wheels

24 driving motors

25 chain stretching devices

26 holes

27 shells

28 shells

30 plates

33 ball bearings, supporting rollern

34 gaps

34 ' gap

34 " gap

36 blade firsts

37 blade second portions

38 center lines

39 recessed sections

40 control cabinets

41 bands

42 steel wires, wire

43 lines of cut

50 blades

50 ' blade

51 balladeur trains

52

53 sliding bearings

54

55 sliding bearings

56 fixed blades

56 ' blade

60 hinges of walking around

61 ends

62 piston rods

63 safety bolts

64 backstops

65 suspension ring

The flat side of 66 bands

67 supporting rollerns

68 guiding faces

70 first blades

69 ' bolt

70 first blades

71 second blades

Claims

1. be cut with the method that the band that strengthens insert especially cuts the conveyer belt made from the enhancing elastomer, wherein, band is positioned between two clamping claws, and, in order to cut, clamping claw and the band that is placed between them compress mutually, meanwhile, along clamping claw and vertical transverse to what be with, the material that passes band moves blade, it is characterized by: in cutting process by means of drive unit, the material both sides of band are bitten by the blade of blade, constitute an acute angle between the blade of blade, blade respectively has linear, or makes the curved shape that protrudes towards the direction of band.

2. according to the described method of claim 1, it is characterized by: the material that blade passes band with having remarkable down suction moves, and at this moment, blade is automatically felt relieved with respect to the enhancing insert that is included in the band.

3. be used to have the band that strengthens insert in particular for by the cutting setting that strengthens the conveyer belt that elastomer makes, it has a clamping device, it is provided with and is placed at band (41) clamping claw (10 that can compress relatively behind position in the middle of it transverse to band (41) by two, 13) form, it also have one utilize that drive unit (21) can move along clamping device, have a blade (36 at least, 70,50 ') blade (17), it is characterized by: blade (36,70,50 ') make linear, or the curved shape that protrudes towards the direction of band; Be provided with another and the acutangulate blade of blade (36,70,50 ') (37,71,56 '); In cutting process, band (41) is positioned at two blades (36,70,50 '; 37,71,56 ') between.

4. according to the described cutting equipment of claim 3, it is characterized by: two blades (36,70; 37,71) be produced on the blade (17).

5. according to claim 3 or 4 described cutting equipments, it is characterized by: two blades (36,70; 37,71) be designed to mutual symmetry, and constitute an edge of a knife that is approximately V-arrangement jointly.

6. according to the described cutting equipment of one of claim 3 to 5, it is characterized by: blade (17) has a significant gap (34,34 ', 34 ") along the direction perpendicular to band (4) flat side; Otherwise blade (17) is along the state that vertically is in rigidity basically of band.

7. according to the described cutting equipment of one of claim 3 to 6, it is characterized by: blade (17) is contained on the balladeur train (20) that can move around along clamping device.

8. according to the described cutting equipment of claim 7, it is characterized by: blade (17) is rigidly fixed on the balladeur train (20); And balladeur train (20) is gone up at one of two clamping claws (10,13) of clamping device with having remarkable down suction (34,34 ', 34 ") and is moved.

9. according to the described cutting equipment of claim 8, it is characterized by: balladeur train (20) is provided with supporting rollern (33 on it deviates from the longitudinal side of blade (17), 67), they can be gone up at the guiding face (68) of that clamping claw (10) that balladeur train (20) is installed and roll; And, for making balladeur train (20) motion, being provided with draw-gear (21), it is fixed on the balladeur train (20) in balladeur train (20) faces 1/2nd height of blade (17).

10. according to the described cutting equipment of one of claim 3 to 9, it is characterized by: clamping claw (10,13) is provided with axial clearance (16,19), and blade (17) passes this gap.

11. according to the described cutting equipment of claim 10, it is characterized by: the side guiding of blade (17) all or is partly undertaken by axial clearance (16,19).

12. according to the described cutting equipment of one of claim 3 to 11, it is characterized by: clamping claw (10,13) can turn round each other by means of a rotary gemel (60); And, comprising clamping claw (10,13) at interior cutting equipment, can open fully at its that end (61) that deviates from rotary gemel (60), so that band (41) can be inserted between the opened clamping claw (10,13) from the side.

13., it is characterized by: the mechanism's (backstop 64) that is provided with restriction clamping claw (10,13) open-angle according to the described cutting equipment of claim 12.