CN102862704B - Wrapping machine and tensioning thereof and brake equipment - Google Patents
Wrapping machine and tensioning thereof and brake equipment Download PDFInfo
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- CN102862704B CN102862704B CN201110202571.XA CN201110202571A CN102862704B CN 102862704 B CN102862704 B CN 102862704B CN 201110202571 A CN201110202571 A CN 201110202571A CN 102862704 B CN102862704 B CN 102862704B
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Abstract
Be used in tensioning in wrapping machine and brake equipment comprises: first lever element, it has the first pivotal axis and the first and second origin of force; Second lever element, it has the second pivotal axis and the third and fourth origin of force; First elastic component, it is connected between the first origin of force and the 3rd origin of force; Second elastic component, it acts on the 4th origin of force; Idler roller, it is rotatably installed on the second origin of force, and the tensile force tensioning packaging film utilizing the first elastic component to provide; Slipper, it is carried by the second lever element, and the braking force provided for utilizing the second elastic component is braked film spool.A kind of wrapping machine comprises aforementioned tensioning and brake equipment.According to the present invention, tensile force and braking force easily regulate.
Description
Technical field
The present invention relates to and be a kind ofly used in tensioning in wrapping machine and braking (brake) device and comprise the wrapping machine of this device.
Background technology
Existing various wrapping machine utilizes packaging film by the packing of product, to play protection, the effect such as attractive in appearance.In such wrapping machine, packaging film is pulled out by from film volume and supplies to packaging film process position.
In the supply process of packaging film, need in packaging film, maintain certain tension force.For this reason, need to arrange tightening device in the feed path of packaging film.In addition, in order to film spool being braked when the supply of packaging film stops, rolling up to prevent film and rotating further, need for film volume arranges brake equipment.
Existing document proposes to be associated with film reel brake device by packaging film tightening device, to realize the interlock of the two.Such as, propose a kind of Shu Mo mechanism of transparent membrane packaging machine in CN201343174Y, wherein the belt tensioning drum of packaging film associates with the brake fork that support brake shoes with connecting screw rod through movable arm.During packaging film supply, provide tensile force by the deadweight of movable arm to packaging film.When packaging film stops supplying, provide braking force by the deadweight of movable arm to brake shoes.In such an embodiment, the braking force of the brake shoes obtained is not too large, and the tensile force of braking force and packaging film is all non-adjustable.
The mounted panel of packaging film idler roller is proposed to be connected to brake plate by spring and elbow-bar mechanism in JP2007290792A, the tension variation of packaging film causes mounted panel pivotable, the pivotal action of mounted panel causes the application force of spring to change, and drives brake plate to engage or release film spool to cause elbow-bar mechanism action.In the publication, same spring is utilized to realize the action of elbow-bar mechanism and obtain the braking force that brake plate acts on film spool.Because this spring will through elbow-bar mechanism indirectly-acting in brake plate, the efficiency therefore spring force being converted into braking force can be given a discount, and there is the problem that braking reliability is low.In addition, the tensile force of braking force and packaging film is all difficult to regulate.
Therefore, it is desirable to solve tensile force and braking force in the packaging film tensioning of prior art and brake linkage and be difficult to the problem regulated.
Summary of the invention
The object of this invention is to provide a kind of simple tensioning and brake equipment, it can provide tensioning and roll up for film for the packaging film in wrapping machine provide braking, and wherein packaging film tensile force and film spool braking force all easily regulate.
For this reason, according to an aspect of the present invention, provide a kind of tensioning and brake equipment, it is used in wrapping machine, and described wrapping machine processes rolling up by the film be carried on film spool the packaging film pulled out, and described tensioning and brake equipment comprise:
First lever element, its first pivotal axis that there are the first and second origin of force and form the first lever element fixed pivot;
Second lever element, its second pivotal axis that there is the third and fourth origin of force and form the second lever element fixed pivot;
First elastic component, it is connected between the first origin of force on the first lever element and the 3rd origin of force on the second lever element;
Second elastic component, it is installed into the 4th origin of force acted on the second lever element;
Idler roller, it is rotatably installed on the first lever element at described second origin of force, and the tensile force tensioning packaging film utilizing described first elastic component to provide;
Slipper, it is carried by described second lever element, brakes film spool for the braking force utilizing described second elastic component to provide.
According to a kind of preferred implementation, described first elastic component is extension spring, and its first origin of force place on the first lever element is hooked on the first lever element, and the described position of the first origin of force on the first lever element is adjustable.
According to a kind of preferred implementation, the three origin of force place of described extension spring on the second lever element is hooked on the second lever element, and described 3rd position of origin of force on the second lever element is adjustable.
According to a kind of preferred implementation, described second elastic component is Compress Spring, and its front end pushes against the 4th origin of force on the second lever element, and rear end rests in a back-up block fixed.
According to a kind of preferred implementation, described tensioning and brake equipment also comprise the set screw be screwed in back-up block, and the front end face of described set screw pushes against the rear end in described Compress Spring; Described Compress Spring is screwed into the length in back-up block to the thrust pressure of described second lever element by the described set screw of change and is conditioned.
According to a kind of preferred implementation, the first pivotal axis of described first lever element is located between described first and second origin of force along the longitudinal direction of the first lever element; Or the first pivotal axis of described first lever element is located at one end of described first lever element, described first and second origin of force are positioned at the same side of described first pivotal axis in the longitudinal direction of described first lever element.
According to a kind of preferred implementation, the second pivotal axis of described second lever element is located between described third and fourth origin of force along the longitudinal direction of the second lever element; Or the second pivotal axis of described second lever element is located at one end of described second lever element, described third and fourth origin of force is positioned at the same side of described second pivotal axis in the longitudinal direction of described second lever element.
According to a kind of preferred implementation, the first pivotal axis of described first lever element is provided with dummy roll, and described packaging film arrives on described idler roller after being guided by described dummy roll.Preferably, be provided with independently another dummy roll, described idler roller in the feed path of packaging film between these two dummy rolls.
According to a kind of preferred implementation, described film spool is provided with the brake sleeve that friction material is made, and it is facing to described slipper, to be engaged by described slipper and to discharge.
According to another aspect of the present invention, provide a kind of wrapping machine, it comprises foregoing tensioning and brake equipment.
Compared with the existing technology, according to the present invention, make use of simpler tensioning and brake equipment and achieve the interlock that the tensioning of packaging film and film spool brake.
In addition, compared with the existing technology, the present invention easily and dividually can regulate packaging film tensile force and braking force.
Accompanying drawing explanation
Fig. 1 is the schematic elevational view of tensioning according to an embodiment of the invention and brake equipment.
Fig. 2 is tensioning shown in Fig. 1 and the schematic perspective view of brake equipment when packaging film is supplied to.
Fig. 3 is that tensioning shown in Fig. 1 and brake equipment be not with schematic perspective view during packaging film.
Detailed description of the invention
The preferred implementation of wrapping machine of the present invention and tensioning and brake equipment is described with reference to the accompanying drawings.
As shown in Figure 1, in wrapping machine of the present invention, the film of packaging film volume 1 is approximately perpendicular to the film spool 2 that vertical adapter plate 100 is rotatably installed on adapter plate 100 and carries.Longitudinal two ends of this film spool 2 are provided with the clamped flanges 22 for keeping film to roll up 1.
In the embodiment shown in Fig. 1, packaging film 30 pulls out from film spool 2, then directed through the first dummy roll 11, idler roller 12, second dummy roll 13 successively along the path shown in Fig. 1, shown in final arrow F on the left of sensing, direction supplies towards downstream.
Clearly demonstrate the film volume 1 and feed path from its packaging film 30 pulled out that load in wrapping machine with block diagram in Fig. 2.
First dummy roll 11, second dummy roll 13 is all approximately perpendicular to adapter plate 100 and is rotatably installed on adapter plate 100.Idler roller 12 is rotatably installed on swing arm 10, can change position to make idler roller 12 along with swing arm 10 around its said pivot (swing).Aforementioned films spool 2, first dummy roll 11, second dummy roll 13 and idler roller 12 are roughly parallel to each other.
Idler roller 12 in the feed path of packaging film 30 between the first dummy roll 11 and the second dummy roll 13, for applying tensile force to packaging film 30.Specifically, idler roller 12 is located at the side (being left side in Fig. 1) of the line of centres of dummy roll 11 and 13 movably.
In the embodiment shown in Fig. 1, swing arm 10 is arranged on adapter plate 100 by pivotal axis in its approximate mid-section.Preferably, swing arm 10 and the first dummy roll 11 share same rotating shaft, i.e. the pivot axis of swing arm 10 and the rotation axis coincident of the first dummy roll 11, and namely the swing of swing arm 10 does not affect the position of the first dummy roll 11 relative to adapter plate 100.But according to concrete structure needs, swing arm 10 can be arranged on adapter plate 100 by pivotal axis at its any part, as long as swing arm 10 can be realized can be roughly parallel to adapter plate 100 pivotable.In addition, swing arm 10 can have independent pivotal axis, to make the pivot axis of swing arm 10 not overlap with the rotation axis of the first dummy roll 11, when this kind of structure needs guarantee first dummy roll 11 to swing with swing arm 10, do not affect the tension of idler roller 12 pairs of packaging films 30.
In the embodiment shown in Fig. 1, idler roller 12 is arranged on the bottom (such as lower end) of swing arm 10 along the direction being approximately perpendicular to adapter plate 100, but, according to concrete structure needs, idler roller 12 can be arranged on any position do not overlapped with the first dummy roll 11 on swing arm 10.
Packaging film 30 feed path according to Fig. 1, in the supply process of packaging film 30, idler roller 12 has identical hand of rotation with the first dummy roll 11, i.e. anticlockwise direction.But, according to the position of idler roller 12 relative to the first dummy roll 11, second dummy roll 13, the transversely traction packaging film 30 of such as idler roller 12 on the right side of the line of centres of the first dummy roll 11 and the second dummy roll 13, idler roller 12 can be contrary with the hand of rotation of the first dummy roll 11.
In addition, in the example depicted in figure 1, in the supply process of packaging film 30, the hand of rotation of the second dummy roll 13 is contrary with the first dummy roll 11.But according to concrete structure needs, the hand of rotation of the second dummy roll 13 can be identical with the first dummy roll 11.
The transversely traction packaging film 30 of idler roller 12 in the side (being left side in Fig. 1) of the line of centres of the first dummy roll 11 and the second dummy roll 13 also applies tensile force to it.This tensile force is provided by the first elastic component 8.In the example depicted in figure 1, described first elastic component is extension spring 8, one end of this extension spring is hooked on the ringbolt 9 that is fixed on swing arm 10, and the other end is hooked on the ringbolt 7 that is fixed on slipper holding element 4 (will be described in detail below).Alternatively, ringbolt 7 and/or 9 can not be adopted, but on slipper holding element 4 and/or swing arm 10, directly form hook hole or other are suitable for the shape of simple hook, to be directly hooked on slipper holding element 4 and/or swing arm 10 end of extension spring 8.
According to a kind of preferred implementation, the hooking position of extension spring 8 on swing arm 10 is adjustable.Such as, when adopting ringbolt 9, ringbolt 9 can be screwed on swing arm 10 in different positions.The position on swing arm 10 is hooked on, adjustable packaging film tensile force by change extension spring 8.
Embodiment according to Fig. 1, extension spring 8 is hooked on the top (such as upper end) of the pivot axis of swing arm 10, idler roller 12 is arranged on the bottom (such as lower end) of the pivot axis of swing arm 10, and swing arm 10 is arranged on adapter plate 100 by said pivot near middle.Like this, swing arm 10 constitutes the first lever element, and the pivot axis of this first lever element forms fulcrum, and extension spring 8 and the point of connection of idler roller 12 on swing arm 10 form two origin of force.The force transmission that an origin of force applies by the first lever element is to another origin of force.In the embodiment shown in Fig. 1, described fulcrum is between two origin of force.Like this, apply moment of rotation at an origin of force and the first lever element will be caused to trend towards around pivot axis, exert a force in opposite direction to make another origin of force.Specifically, extension spring 8 causes swing arm 10 to trend towards around its pivot axis pivotable along clockwise direction to the applied moment roughly to the right that swing arm 10 applies, with make idler roller 12 roughly left opposing connection cross its packaging film apply tensile force.
It will be understood by those skilled in the art that the fulcrum of the first lever element be made up of swing arm 10 and the relative position of two origin of force can design according to concrete needs.Such as, can as shown in FIG. 1 fulcrum be located between two origin of force.But, also fulcrum can be located at one end of the first lever element, an origin of force in two origin of force is located between fulcrum and another origin of force (which in two origin of force, closer in fulcrum, can be determined according to specific needs).The present invention does not get rid of the situation of two origin of force equal with pivot distance (direction of the power of now two origin of force place applyings is contrary).
Be appreciated that equally except the extension spring 8 shown in Fig. 1, the first elastic component acting on swing arm 10 can adopt other form, such as Compress Spring, sheet spring, elastic component of other shape be made up of other elastomeric material etc.
In order to brake (brake) film spool 2, present invention employs the slipper 3 be arranged on slipper holding element 4.This slipper 3 is arranged facing to film spool 2.Preferably, film spool 2 is equipped with brake sleeve 24, and it is made up of friction material, to improve braking effect.
Slipper holding element 4 is pivotably mounted on adapter plate 100.In the mode shown in Fig. 1, the upper end of slipper holding element 4 is installed with the ringbolt 7 for hook extension spring 8, the lower end of slipper holding element 4 is arranged on adapter plate 100 by the pivotal axis 20 being approximately perpendicular to adapter plate 100, and slipper holding element 4 can by pivotal axis 20 pivotable on adapter plate 100.Be roughly parallel to the pivoting action of adapter plate 100 by slipper holding element 4, slipper 3 can be made to move and leave film spool 2 towards film spool 2 and move, thus braking film spool 2 and release film spool 2.
The braking force (pressure) that slipper 3 pairs of film spools 2 apply is provided by the second elastic component 5.In the example depicted in figure 1, the second elastic component is Compress Spring 5.The rear end of this Compress Spring 5 rests in the back-up block 26 be fixed on adapter plate 100, and the front end of Compress Spring 5 pushes against the approximate mid-section in slipper holding element 4, to be pushed along the direction towards film spool 2 by slipper holding element 4.
According to a kind of preferred implementation, the thrust pressure of set screw 6 pairs of Compress Springs 5 is utilized to regulate.The front portion of this set screw 6 is screwed in back-up block 26, and the front end face of set screw 6 pushes against the rear end in Compress Spring 5.By screwing set screw 6 to make its () movement forward in Fig. 1 to the right, the rear end of Compress Spring 5 can be made to move forward, increase the braking force that Compress Spring 5 provides to slipper 3 thus.By screwing set screw 6 to make its () movement backward in Fig. 1 left, move after the rear end of Compress Spring 5 can be made, reduce the braking force that Compress Spring 5 provides to slipper 3 thus.
According to a kind of preferred implementation, the hooking position of extension spring 8 on slipper holding element 4 is adjustable.Such as, when adopting ringbolt 7, ringbolt 7 can be screwed in different positions on slipper holding element 4.
Be hooked on the position on slipper holding element 4 by change extension spring 8, adjustable swing arm 10 is on the impact of braking maneuver.Such as, extension spring 8 is hooked on the distance that position on slipper holding element 4 and pivotal axis 20 be separated by and strengthens, and the release movement of slipper 3 pairs of film spools 2 may be caused to accelerate, but braking maneuver slows down.Otherwise extension spring 8 is hooked on the distance that position on slipper holding element 4 and pivotal axis 20 be separated by and reduces, and the braking maneuver of slipper 3 pairs of film spools 2 may be caused to accelerate, but release movement slows down.Therefore, extension spring 8 can be regulated as required to be hooked on position on slipper holding element 4.
Can see, slipper holding element 4 constitutes the second lever element, and its fulcrum is pivotal axis 20, and two origin of force are the hooking position of extension spring 8 on slipper holding element 4 and the thrusting position of Compress Spring 5 on slipper holding element 4.It will be understood by those skilled in the art that the fulcrum of the second lever element and the relative position of two origin of force can design according to concrete needs.Such as, as shown in FIG. 1 fulcrum can be located at one end of the second lever element, origin of force is located between fulcrum and another origin of force (which in two origin of force, closer in fulcrum, can be determined according to specific needs).The present invention does not get rid of two origin of force situation equal with pivot distance (now the direction of power that applies, two origin of force places is contrary).As an alternative, also fulcrum can be located between two origin of force.
Be appreciated that equally except the Compress Spring 5 shown in Fig. 1, the second elastic component acting on slipper holding element 4 can adopt other form, such as extension spring, sheet spring, elastic component of other shape be made up of other elastomeric material etc.
The details of structure shown in Fig. 1 clearly shows in the block diagram shown in Fig. 3.
By structure presented hereinbefore, in wrapping machine, define tensioning and brake equipment, wherein, comprise for the first lever element of tensioning packaging film and the second lever element for involving in row braking to film.Be coupled by the first elastic component between first lever element with the second lever element, this first elastic component is for generation of packaging film tensile force.Braking force is produced by the second elastic component acting on the second lever element.By said structure, the braking maneuver of the tensioning of packaging film and film volume is associated, and packaging film tensile force and braking force can regulate respectively.
Introduce the mode of operation that have employed the wrapping machine of above-mentioned tensioning and brake equipment of the present invention below.
First, (packaging film packaged articles is such as utilized in startup packaging film process operation, pocket etc. is made with packaging film) before, tensioning and brake equipment be in braking and without tensile force position, wherein, extension spring 8 is in not by state of tension, and slipper holding element 4 is only compressed the thrust pressure of spring 5, thus slipper 3 is pressed against on the brake sleeve 24 on film spool 2, be braked to make film spool 2.In such a state, film volume 1 is loaded on film spool 2, packaging film 30 is put on display from film volume 1 and walked around the first dummy roll 11, idler roller 12, second dummy roll 13 successively, so that encapsulation roller (not shown) supply towards downstream, as shown in Figure 1, 2.
After startup packaging film process operation, the packed roller tractive of packaging film 30, thus traction force is produced in packaging film 30, this traction force causes idler roller 12 to be subject to towards the thrust on roughly right side, causes swing arm 10 roller 12 that is tensioned to drive pivot axis (being also the rotation axis of the first dummy roll 11 in Fig. 1) pivotable in the counterclockwise direction around swing arm 10 thus.
The anticlockwise direction pivotable of swing arm 10 causes extension spring 8 to be forced to stretch, thus produces pulling force in extension spring 8.The pulling force of extension spring 8 acts on slipper holding element 4, and the pulling force of extension spring 8 overcomes the thrust of Compress Spring 5 and pulled by slipper holding element 4, rotates in the counterclockwise direction around pivotal axis 20 to make slipper holding element 4.Now, Compress Spring 5 is compressed, then slipper 3 be braked block holding element 4 drive and along deviate from film spool 2 direction rotate, thus release film spool 2, film spool 2 can be rotated, this makes film volume 1 can rotate together along with film spool 2, in proper order release packaging film 30, to provide the packaging film 30 needed for encapsulation.Now, tensioning and brake equipment are in tensioning and brake release position, and packaging film 30 can continue to be released.
When wrapping machine stops packaging film process operation, the traction force that packaging film 30 is subject to disappears, therefore the thrust towards roughly right side that idler roller 12 is subject to also disappear, and causes swing arm 10 spring 8 that is stretched to drive pivot axis pivotable along clockwise direction around swing arm 10 thus.
Along with swing arm 10 goes back to along clockwise direction, the pulling force of extension spring 8 reduces final disappearance gradually, simultaneously Compress Spring 5 promotes slipper holding element 4 and rotates along clockwise direction around pivotal axis 20, slipper 3 is braked block holding element 4 and drives and move along the direction towards film spool 2, slipper 3 presses against on brake sleeve 24 the most at last, to make film spool 2 be braked, block film spool 2 and film volume 1 rotate thus.
Can see, the interlock that the present invention utilizes simple tensioning and brake equipment to achieve the tensioning of packaging film and film spool to brake.Compared with the existing technology, it is few that the advantage of this design comprises number of parts, and cost is low.
In addition, by regulating set screw 6 simply, the pressure of Compress Spring 5 can just be changed, with the braking force of adjustable brake block 3.On the other hand, being hooked on position on swing arm 10 by changing extension spring 8 simply, just can regulating the tensile force of packaging film.Tensile force due to packaging film is subject to the impact of the braking force of slipper, and therefore the preferred braking force at slipper regulates the tensile force of packaging film after determining.
Compared with the existing technology, the present invention can easily and independently of one another change package film tensile force and film spool braking force.
Tensioning of the present invention and brake equipment can be used to various membrane type wrapping machine, such as wrapping machine.
Although describe particular implementation of the present invention here in detail, the object that they are only used to explain provides, and should not think that they are construed as limiting scope of the present invention.Without departing from the spirit and scope of the present invention, various replacement, change and transformation can be conceived out.
Claims (17)
1. tensioning and a brake equipment, it is used in wrapping machine, and described wrapping machine processes rolling up by the film be carried on film spool the packaging film pulled out, and described tensioning and brake equipment comprise:
First lever element, its first pivotal axis that there are the first and second origin of force and form the first lever element fixed pivot;
Second lever element, its second pivotal axis that there is the third and fourth origin of force and form the second lever element fixed pivot;
First elastic component, it is connected between the first origin of force on the first lever element and the 3rd origin of force on the second lever element;
Second elastic component, it is installed into the 4th origin of force acted on the second lever element;
Idler roller, it is arranged on the first lever element at described second origin of force, and the tensile force tensioning packaging film utilizing described first elastic component to provide;
Slipper, it is carried by described second lever element, brakes film spool for the braking force utilizing described second elastic component to provide.
2. tensioning as claimed in claim 1 and brake equipment, wherein, described first elastic component is extension spring, and its first origin of force place on the first lever element is hooked on the first lever element, and the described position of the first origin of force on the first lever element is adjustable.
3. tensioning as claimed in claim 2 and brake equipment, wherein, the three origin of force place of described extension spring on the second lever element is hooked on the second lever element, and described 3rd position of origin of force on the second lever element is adjustable.
4. tensioning as claimed any one in claims 1 to 3 and brake equipment, also comprise fixing back-up block;
Described second elastic component is Compress Spring, and its front end pushes against the 4th origin of force on the second lever element, and rear end rests in described back-up block.
5. tensioning as claimed in claim 4 and brake equipment, also comprise the set screw be screwed in described back-up block, the front end face of described set screw pushes against the rear end in described Compress Spring;
Described Compress Spring is screwed into the length in back-up block to the thrust pressure of described second lever element by the described set screw of change and is conditioned.
6. as claimed any one in claims 1 to 3 tensioning and brake equipment, wherein, the first pivotal axis of described first lever element is located between described first and second origin of force along the longitudinal direction of the first lever element; Or
First pivotal axis of described first lever element is located at one end of described first lever element, and described first and second origin of force are positioned at the same side of described first pivotal axis in the longitudinal direction of described first lever element.
7. tensioning as claimed in claim 4 and brake equipment, wherein, the first pivotal axis of described first lever element is located between described first and second origin of force along the longitudinal direction of the first lever element; Or
First pivotal axis of described first lever element is located at one end of described first lever element, and described first and second origin of force are positioned at the same side of described first pivotal axis in the longitudinal direction of described first lever element.
8. tensioning as claimed in claim 5 and brake equipment, wherein, the first pivotal axis of described first lever element is located between described first and second origin of force along the longitudinal direction of the first lever element; Or
First pivotal axis of described first lever element is located at one end of described first lever element, and described first and second origin of force are positioned at the same side of described first pivotal axis in the longitudinal direction of described first lever element.
9. as claimed any one in claims 1 to 3 tensioning and brake equipment, wherein, the second pivotal axis of described second lever element is located between described third and fourth origin of force along the longitudinal direction of the second lever element; Or
Second pivotal axis of described second lever element is located at one end of described second lever element, and described third and fourth origin of force is positioned at the same side of described second pivotal axis in the longitudinal direction of described second lever element.
10. tensioning as claimed in claim 4 and brake equipment, wherein, the second pivotal axis of described second lever element is located between described third and fourth origin of force along the longitudinal direction of the second lever element; Or
Second pivotal axis of described second lever element is located at one end of described second lever element, and described third and fourth origin of force is positioned at the same side of described second pivotal axis in the longitudinal direction of described second lever element.
11. tensioning as claimed in claim 5 and brake equipments, wherein, the second pivotal axis of described second lever element is located between described third and fourth origin of force along the longitudinal direction of the second lever element; Or
Second pivotal axis of described second lever element is located at one end of described second lever element, and described third and fourth origin of force is positioned at the same side of described second pivotal axis in the longitudinal direction of described second lever element.
12. tensioning as claimed in claim 6 and brake equipments, wherein, the second pivotal axis of described second lever element is located between described third and fourth origin of force along the longitudinal direction of the second lever element; Or
Second pivotal axis of described second lever element is located at one end of described second lever element, and described third and fourth origin of force is positioned at the same side of described second pivotal axis in the longitudinal direction of described second lever element.
13. tensioning as claimed in claim 7 and brake equipments, wherein, the second pivotal axis of described second lever element is located between described third and fourth origin of force along the longitudinal direction of the second lever element; Or
Second pivotal axis of described second lever element is located at one end of described second lever element, and described third and fourth origin of force is positioned at the same side of described second pivotal axis in the longitudinal direction of described second lever element.
14. tensioning as claimed in claim 8 and brake equipments, wherein, the second pivotal axis of described second lever element is located between described third and fourth origin of force along the longitudinal direction of the second lever element; Or
Second pivotal axis of described second lever element is located at one end of described second lever element, and described third and fourth origin of force is positioned at the same side of described second pivotal axis in the longitudinal direction of described second lever element.
15. tensioning as claimed any one in claims 1 to 3 and brake equipments, wherein, the first pivotal axis of described first lever element is provided with dummy roll, and described packaging film arrives on described idler roller after being guided by described dummy roll.
16. tensioning as claimed any one in claims 1 to 3 and brake equipments, wherein, described film spool is provided with the brake sleeve that friction material is made, and it is facing to described slipper, to be engaged by described slipper and to discharge.
17. 1 kinds of wrapping machine, it comprises tensioning according to any one of claim 1 to 16 and brake equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110202571.XA CN102862704B (en) | 2011-07-08 | 2011-07-08 | Wrapping machine and tensioning thereof and brake equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110202571.XA CN102862704B (en) | 2011-07-08 | 2011-07-08 | Wrapping machine and tensioning thereof and brake equipment |
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| Publication Number | Publication Date |
|---|---|
| CN102862704A CN102862704A (en) | 2013-01-09 |
| CN102862704B true CN102862704B (en) | 2016-03-02 |
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| CN201110202571.XA Expired - Fee Related CN102862704B (en) | 2011-07-08 | 2011-07-08 | Wrapping machine and tensioning thereof and brake equipment |
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