CN103331992A

CN103331992A - Tension control mechanism of cloth of printing machine

Info

Publication number: CN103331992A
Application number: CN2013102160693A
Authority: CN
Inventors: 王首斌; 李景锋; 刘慧锋
Original assignee: SHENZHEN ALL-PRINTED GRAPHICS TECHNOLOGY Co Ltd
Current assignee: SHENZHEN ALL-PRINTED GRAPHICS TECHNOLOGY Co Ltd
Priority date: 2013-06-03
Filing date: 2013-06-03
Publication date: 2013-10-02
Anticipated expiration: 2033-06-03
Also published as: CN103331992B

Abstract

A tension control mechanism of cloth of a printing machine comprises fixing plates, swinging arms, a tension roller component, and angle adjustment components, wherein each swinging arm is pivoted on each fixing plate by a pivot; a sliding groove is formed in each swinging arm, and internally provided with a rolling component capable of moving in a length direction of the sliding groove; first limit switches and second limit switches are arranged on the swinging arms; signal input ends of the first limit switches and the second limit switches are connected with a controller controlling a cloth feeding motor of the printing machine; the tension roller component is positioned at the outer side end parts of the swinging arms; the end parts of the tension roller component are pivoted on the rolling components; and the angle adjustment components are used for driving the inner side ends of the swinging arms to allow the swinging arms to rotate relative to the fixing plates. According to the mechanism, a tension roller slides along the swinging arms to trigger the different limit switches, correspondingly controls the on and off of the cloth feeding motor, and realizes automatic cloth feeding. Since angles of the swinging arms are adjustable, and the swinging arms can be fixed at the adjusted angles, tension force of the tension roller on the cloth is adjustable and can be kept constant; and the cloth tension is realized effectively.

Description

A kind of tension control mechanism of printing machine cloth

Technical field

The present invention relates to a kind of tension control mechanism of printing machine cloth.

Background technology

Strainer is the vitals of printing machine, and it mainly acts on is that stocks such as cloth are carried out tensioning, and being convenient to the conveying of cloth and making cloth is flat when undertaking the printing of figure.

Referring to Fig. 1, existing strainer comprises fixed head 51, swing arm 53 and idler roller 54, the medial extremity of swing arm 53 is articulated on the fixed head 51 by a pivot 52, idler roller 54 is connected in the outboard end of swing arm 53, this strainer is in implementing the tensioning process, swing arm 53 is rotated around pivot 52, forms different rotational angles.Idler roller 54 is under the pulling of cloth, and its tensile force that cloth is applied is along with sinusoidal rule changes, and when swing arm 53 pendulum during to the upright position, tensile force is zero, and when swing arm 53 pendulum during to horizontal level, tensile force is maximum.Because looped fabric and elastic force cloth are along with its tensile elongation of tension variation also changes thereupon, existing strainer can not be realized the adjusting of tensile force size, therefore, after the cloth printing is finished, because the disappearance of tensile force, the figure that causes printing on the cloth changes, thereby influences printing effect.

Summary of the invention

At the deficiencies in the prior art, purpose of the present invention is intended to provide a kind of tension control mechanism of printing machine cloth, and it can realize automatic work feed and adjust the size of the tensile force that cloth is applied, and can be with the size after the adjustment of remaining on of constant tension.

For achieving the above object, the present invention adopts following technical scheme:

A kind of tension control mechanism of printing machine cloth comprises,

Fixed head;

Be articulated in swing arm on the fixed head by a pivot, offer one in this swing arm and extend and be positioned at the chute in the pivot outside along its length direction, chute built-in one can be along the rolling member of chute length direction activity, also be provided with first limit switch that is positioned at the chute outboard end and second limit switch that is positioned at the chute medial extremity in this swing arm, this first limit switch and second limit switch are corresponding with rolling member, and its signal output part is connected with the controller of control printing machine work feed motor;

Be positioned at the idler roller assembly of swing arm outboard end, the end of this idler roller assembly is articulated on the rolling member; And,

The medial end that is used for the drive swing arm makes swing arm with respect to the angular adjustment assembly of fixed head rotation.

The angular adjustment assembly comprises parallel with pivot and is articulated in connecting rod on the fixed head, synchronous be connected on the connecting rod and be used for the pinch roller of downward roof pressure swing arm medial end and the rocking arm that is connected in connecting rod synchronously, the central shaft of pinch roller and the central axes of connecting rod and stagger mutually.

Connecting rod is provided with a Plug Division and is positioned at the Plug Division outside and the surface offers externally threaded connecting portion, being socketed on the Plug Division and can sliding along the length direction of connecting rod of synchronous rocker; The angular adjustment assembly also includes one and is used for connecting rod is locked in locking assembly on the fixed head, and this locking assembly comprises and is socketed on the connecting rod and is snap-fit at the stage portion and first friction plate between the fixed head medial surface that arrange on the connecting rod, is socketed in second friction plate on the connecting rod and between fixed head lateral surface and rocking arm, is screwed onto on the connecting portion and is used for pushing the handwheel of rocking arm.

The one bearing of trend tooth bar consistent with the bearing of trend of chute also fixedly arranged in the swing arm, be articulated with on the rolling member one with the tooth bar meshed gears.

Rolling member is a bearing.

The idler roller assembly comprises interior roller, be socketed in the roller outside outer roller, be fixed in roll end and the spindle nose that passed by the end of outer roller, rolling member is articulated in the end of spindle nose, spindle nose is articulated in the end of outer roller inwall.

Beneficial effect of the present invention is:

Than prior art, idler roller of the present invention is controlled the opening and closing of work feed motor accordingly, thereby is realized automatic work feed along the different limit switches of rocking arm slide trigger.Simultaneously, because the angle after can adjusting the angle of swing arm and swing arm can being fixed on this adjustment makes idler roller to the tensile force adjustable size of cloth and can keep invariable, effectively solved the problem of cloth tensioning.

Description of drawings

Fig. 1 is the structural representation of existing strainer;

Fig. 2 is structural representation of the present invention;

Fig. 3 is the structural representation of angular adjustment assembly;

Fig. 4 is the cutaway view of idler roller assembly;

Wherein: 10, fixed head; 11, pivot; 20, swing arm; 21, chute; 22, tooth bar; 23, gear; 24, first limit switch; 25, second limit switch; 26, bearing; 30, idler roller assembly; 31, interior roller; 32, outer roller; 33, spindle nose; 40, angular adjustment assembly; 41, pinch roller; 42, connecting rod; 421, connecting portion; 422, Plug Division; 43, handwheel; 44, rocking arm; 45, first friction plate; 46, second friction plate.

The specific embodiment

Below, by reference to the accompanying drawings and the specific embodiment, the present invention is described further:

Referring to Fig. 2,3,4, tension control mechanism for a kind of printing machine cloth of the present invention, comprise fixed head 10, swing arm 20, idler roller assembly 30 and angular adjustment assembly 40, fixed head 10 is as the installation basis of entire mechanism, swing arm 20 is articulated on the fixed head 10 by a pivot 11, offer one in the swing arm 20 and extend and be positioned at the chute 21 in pivot 11 outsides along its length direction, this chute 21 is built-in with one can be along the bearing 26 of chute 21 length direction activities, the diameter of these bearing 26 outer rings is suitable with the width of chute 21, and it is limited in the chute 21 and can rolls in chute 21; Swing arm 20 tops also are provided with first limit switch 24 and second limit switch 25, first limit switch 24 and second limit switch 25 lay respectively at outboard end and the medial end top of chute 21, its the two corresponding with bearing 26 respectively, be rolled to the relevant position of chute 21 at bearing 26 after, first limit switch 24 and second limit switch 25 can obtain signal accordingly; The first above-mentioned limit switch 24 and the signal output part of second limit switch 25 link to each other with the controller of control printing machine work feed motor, the signal that controller sends according to above-mentioned first limit switch 24 and second limit switch 25, the opening and closing of control work feed motor, concrete is, when bearing 26 is rolled to first limit switch, 24 1 ends, the work feed motor cuts out, and when bearing 26 was rolled to second limit switch, 25 1 ends, the work feed motor was opened.The end of above-mentioned idler roller assembly 30 is articulated on the bearing 26, and size and structure that both sides of the present invention are provided with a fixed head 10 and swing arm 20, two swing arms 20 are identical, and the two end portions of idler roller assembly 30 is articulated on the bearing 26 in two swing arms 20.

Angular adjustment assembly 40 is mainly used in adjusting the angle of swing arm 20 and is used for fixed angle with swing arm 20 in needed position; This angular adjustment assembly 40 comprises parallel with pivot 11 and is articulated in connecting rod 42 on the fixed head 10, synchronous be connected on the connecting rod 42 and be used for the pinch roller 41 of downward roof pressure swing arm 20 medial ends and the Rocker arm 44 that is connected in connecting rod 42 synchronously, the central axes of the central shaft of pinch roller 41 and connecting rod 42 and staggering mutually.Swing arm 20 connects into a leverage by pivot 11, the gravity that end bears idler roller assembly 30 is rotated in its outside, has the trend that moves downward, medial extremity then is pressed on the bottom of pinch roller 41, when needs are adjusted the rotational angle of swing arm 20, then rotate Rocker arm 44, driving pinch roller 41 rotates, because pinch roller 41 forms an eccentric cam mechanism with connecting rod 42, thereby, when clockwise rotating Rocker arm 44, pinch roller 41 can be to the medial end that presses down swing arm 20, the rotation thereby the idler roller assembly 30 that swing arm 20 outboard ends are connected makes progress, otherwise, when rotating counterclockwise Rocker arm 44, then idler roller assembly 30 can rotate under the effect of gravity, until the medial end roof pressure of swing arm 20 in pinch roller 41 lower end peripheries.In addition, connecting rod 42 is provided with that a Plug Division 422 and is positioned at 422 outsides, Plug Division and the surface is provided with externally threaded connecting portion 421, the cross section of Plug Division 422 is square; Rocker arm 44 is provided with for Plug Division 422 and penetrates and the square hole of form fit; utilize square hole and Plug Division 422 to cooperate; can make Rocker arm 44 not only can drive connecting rod 42 and rotate that Rocker arm 44 can slide along the length direction of connecting rod 42 simultaneously.Above-mentioned angular adjustment assembly 40 also includes a locking assembly that is used for connecting rod 42 is locked in fixed head 10, this locking assembly comprise be socketed on the connecting rod 42 and be snap-fit at the stage portion and first friction plate 45 between fixed head 10 medial surfaces that arrange on the connecting rod 42, be socketed in second friction plate 46 on the connecting rod 42 and between fixed head 10 lateral surfaces and Rocker arm 44, to be screwed onto connecting portion 421 outside and be used for pushing the handwheels 43 of Rocker arm 44; After rotation Rocker arm 44 is adjusted the angle of swing arm 20, inwardly screw handwheel 43 and inwardly push Rocker arm 44; Rocker arm 44 then pushes second friction plate 46; after screwing handwheel 43 fully; fixed head 10 is folded between first friction plate 45 and second friction plate 46; thus make connecting rod 42 not rotate with respect to fixed head 10, that is to say that pinch roller 41 does not have the free degree of rotation, thereby make the angle after swing arm 20 remains on adjustment.

In the such scheme of the present invention, adopted bearing 26 as rolling member, it can also adopt the parts that can roll as roller etc. in chute 21.In order to guarantee that idler roller assembly 30 is in synchronous movement on the bearing of trend of chute 21, the one bearing of trend tooth bar consistent with the bearing of trend of chute 21 22 also fixedly arranged in swing arm 20, be articulated with on the bearing 26 one with tooth bar 22 meshed gears 23, the tooth bar 22 of both sides and gear 23 actings in conjunction corresponding with it make moving along chute 21 that idler roller assembly 30 two ends can be synchronous.

Idler roller assembly 30 comprises interior roller 31, be socketed in roller 31 outsides outer roller 32, be fixed in roller 31 ends and the spindle nose 33 that passed by the end of outer roller 32, bearing 26 is articulated in the end of spindle nose 33, and spindle nose 33 is articulated in the end of outer roller 32 inwalls.

The present invention in use, utilize idler roller assembly 30 to implement tensioning, its concrete steps are, at first according to the requirement of cloth, adjust the angle of swing arm 20, idler roller assembly 30 is on the corresponding angle, because be not subjected to the pressure of cloth, idler roller assembly 30 is positioned at the bottom of bottom chute 21 under the effect of gravity, a side of first limit switch 24 just, this moment, the work feed motor cut out, printing machine intermittently pull cloth, and the bearing of trend of idler roller assembly 30 along chute 21 upwards drawn high, in this process, 30 pairs of cloth of idler roller assembly are implemented tensioning, and constantly along 25 1 lateral movements of chute 21 towards second limit switches, when sliding into second limit switch, 25 places, the work feed motor is opened, and begins to export cloth.

Said mechanism is after the angle of adjusting swing arm 20, and swing arm 20 is fixed on this angle, because idler roller assembly 30 is along the component on chute 21 bearing of trends cloth to be implemented tensioning according to self gravitation, therefore, behind swing arm 20 fixed angles, the tensile force that the 30 pairs of cloth of idler roller assembly that connect on it apply is also just invariable, thereby has effectively solved the problem of cloth tensioning.

To one skilled in the art, can make other various corresponding changes and deformation, and these all changes and deformation should belong within the protection domain of claim of the present invention all according to technical scheme described above and design.

Claims

1. the tension control mechanism of a printing machine cloth is characterized in that, comprise,

Fixed head;

2. the tension control mechanism of printing machine cloth as claimed in claim 1, it is characterized in that, the angular adjustment assembly comprises parallel with pivot and is articulated in connecting rod on the fixed head, synchronous be connected on the connecting rod and be used for the pinch roller of downward roof pressure swing arm medial end and the rocking arm that is connected in connecting rod synchronously, the central shaft of pinch roller and the central axes of connecting rod and stagger mutually.

3. the tension control mechanism of printing machine cloth as claimed in claim 2, it is characterized in that, connecting rod is provided with a Plug Division and is positioned at the Plug Division outside and the surface offers externally threaded connecting portion, being socketed on the Plug Division and can sliding along the length direction of connecting rod of synchronous rocker; The angular adjustment assembly also includes one and is used for connecting rod is locked in locking assembly on the fixed head, and this locking assembly comprises and is socketed on the connecting rod and is snap-fit at the stage portion and first friction plate between the fixed head medial surface that arrange on the connecting rod, is socketed in second friction plate on the connecting rod and between fixed head lateral surface and rocking arm, is screwed onto on the connecting portion and is used for pushing the handwheel of rocking arm.

4. the tension control mechanism of printing machine cloth as claimed in claim 1 is characterized in that, the bearing of trend tooth bar consistent with the bearing of trend of chute also fixedly arranged in the swing arm, be articulated with on the rolling member one with the tooth bar meshed gears.

5. the tension control mechanism of printing machine cloth as claimed in claim 1 is characterized in that, rolling member is a bearing.

6. the tension control mechanism of printing machine cloth as claimed in claim 1, it is characterized in that, the idler roller assembly comprises interior roller, be socketed in the roller outside outer roller, be fixed in roll end and the spindle nose that passed by the end of outer roller, rolling member is articulated in the end of spindle nose, and spindle nose is articulated in the end of outer roller inwall.