CN211225629U

CN211225629U - Coiled material feeding equipment and picture and text machine

Info

Publication number: CN211225629U
Application number: CN201921719650.6U
Authority: CN
Inventors: 林立雪; 刘铁生
Original assignee: Jingwei Systemtechnik Ltd
Current assignee: Ningbo Jingwei Cnc Co ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-08-11
Anticipated expiration: 2029-10-15

Abstract

The utility model provides a coiled material feeding equipment and picture and text machine, coiled material feeding equipment, including cylinder mechanism, base mechanism and depression bar mechanism, cylinder mechanism includes the pivot, and the pivot is equipped with the tension structure, and the tension structure establishes the first sleeve outside the pivot including the cover, and first telescopic outer wall connection has the second sleeve, inner wall connection has the toper mounting, and the telescopic outer wall of second and the inner wall butt in shaft hole, when first sleeve and second sleeve are fixed each other, the pivot is held tightly to the toper mounting, realizes the reciprocal anchorage of coiled material and pivot. The utility model realizes the rapid fixation between the coiled material and the rotating shaft by arranging the second sleeve, the first sleeve and the conical fixing piece which are mutually matched, thereby improving the production efficiency; set up base mechanism and realize that this coiled material feeding equipment can be used directly on the current picture and text machine that is used for panel processing, under the present lower circumstances of transformation of picture and text machine, realize the processing of panel on same picture and text machine, can realize the processing of coiled material again, the commonality is strong.

Description

Coiled material feeding equipment and picture and text machine

Technical Field

The utility model relates to a picture and text equipment technical field particularly, relates to a coiled material feeding equipment and picture and text machine.

Background

Along with the rapid development of the printing industry, the requirements for packaging image-text materials such as paper boxes, book covers, albums and the like are increased, and in order to adapt to batch production, processing equipment capable of realizing automatic feeding and cutting of the image-text materials appears on the market at present, so that the labor force of enterprises is greatly reduced, and the manufacturing efficiency of the image-text materials can be improved.

The image-text materials are commonly in two forms of plates and coiled materials, and the existing image-text processing equipment for processing the coiled materials has a complex structure for feeding the coiled materials and is complex to operate, so that the processing efficiency of the coiled materials is low; and the existing image-text processing equipment can only realize the automatic processing operation of the plate or the automatic processing operation of the coiled material independently, and has low universality.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem that coiled material feeding equipment structure is complicated, and machining efficiency is low, and the commonality is low.

In order to solve at least one aspect of the above-mentioned problem, the utility model discloses at first provide a coiled material feeding equipment, include: the roller mechanism is used for bearing a coiled material with a shaft hole, and comprises a rotating shaft which is arranged in the shaft hole in a penetrating mode, the rotating shaft is provided with a tensioning structure, the tensioning structure comprises a first sleeve which is sleeved outside the rotating shaft, the outer wall of the first sleeve is connected with a second sleeve, the inner wall of the first sleeve is connected with a conical fixing piece, the outer wall of the second sleeve is abutted to the inner wall of the shaft hole, and when the first sleeve and the second sleeve are fixed to each other, the conical fixing piece tightly holds the rotating shaft, so that the coiled material and the rotating shaft are fixed to each other; the base mechanism is used for supporting the roller mechanism to rotate, and the base mechanism is detachably arranged on the image-text machine; and the compression bar mechanism is used for driving the roller mechanism to rotate, and is matched with a conveying belt of the image-text machine for use.

Preferably, the base mechanism comprises a base and support frames fixed on the left side and the right side of the base, two bearings are arranged at the upper ends of the support frames, and the rotating shaft is arranged on the bearings.

Preferably, the compression bar mechanism comprises a compression bar used for compressing the coiled material on the conveyor belt, two ends of the compression bar are respectively connected with a connecting rod, the compression bar is hinged on the base mechanism through the connecting rod, and the connecting rod is further connected with a tension spring used for tensioning the compression bar.

Preferably, the outer wall of the second sleeve has a tapered surface that abuts against the inner wall of the shaft hole.

Preferably, the outer wall of the second sleeve is detachably connected with an annular conical piece.

Preferably, the roller mechanism further comprises a damping member for preventing the roller mechanism from freely rotating, and the damping member is arranged at both ends of the rotating shaft.

Preferably, the roller mechanism is further provided with a limiting structure for fixing the damping piece to the base mechanism, the limiting structure comprises a limiting part connected to the base mechanism, the limiting part is provided with a half waist-shaped groove, and the damping piece is provided with a limiting surface matched with the half waist-shaped groove.

Preferably, one end of the limiting part is hinged to the base mechanism, a groove is formed in the other end of the limiting part, and a convex bead matched with the groove is arranged on the base mechanism.

Compared with the prior art, the coiled material feeding equipment in the utility model realizes the quick fixation between the coiled material and the rotating shaft by arranging the second sleeve, the first sleeve and the conical fixing piece which are mutually matched, thereby improving the production efficiency; through setting up detachable base mechanism for this coiled material feeding equipment can regard as independent detachable equipment, and this coiled material feeding equipment can be used directly on the current picture and text machine that is used for panel processing, reforms transform at picture and text machine under this lower circumstances, just can realize the processing of panel on same picture and text machine, can realize the processing of coiled material again, and the commonality is strong, helps marketing.

Secondly, provide a picture and text machine, include above-mentioned coiled material feeding equipment.

Preferably, a switch or a sensor for switching the working mode is arranged on the image-text machine, and a pin matched with the switch or the sensor is arranged on the base mechanism.

Compared with the prior art, picture and text machine be the same with the advantage that above-mentioned coiled material feeding equipment had for prior art, no longer describe herein.

Drawings

Fig. 1 is an overall structure diagram of a graphic machine according to an embodiment of the present invention;

fig. 2 is a first structural diagram of a coil feeding device according to an embodiment of the present invention;

fig. 3 is a second structural diagram of a coiled material feeding device according to an embodiment of the present invention;

fig. 4 is a third structural diagram of a coiled material feeding device according to an embodiment of the present invention;

fig. 5 is a partial structure diagram of a coil feeding device according to an embodiment of the present invention;

fig. 6 is a partial structure diagram of a coil feeding device according to an embodiment of the present invention;

fig. 7 is a structural diagram of a limiting element according to an embodiment of the present invention;

FIG. 8 is a view showing a structure of a damper according to an embodiment of the present invention;

fig. 9 is a partial structural view of a graphic machine according to an embodiment of the present invention;

FIG. 10 is an enlarged view of portion A of FIG. 9;

fig. 11 is a partial exploded view of a drum mechanism according to an embodiment of the present invention;

fig. 12 is an exploded view of a tension structure according to an embodiment of the present invention;

fig. 13 is an exploded view of a second tensioning structure according to an embodiment of the present invention;

fig. 14 is a structural view of a tension structure according to an embodiment of the present invention;

fig. 15 is an exploded view of a second sleeve according to an embodiment of the present invention;

FIG. 16 is a block diagram of a second sleeve according to an embodiment of the present invention;

fig. 17 is a structural diagram of a first sleeve according to an embodiment of the present invention.

Description of reference numerals:

1-coil, 11-shaft hole, 2-roller mechanism, 21-shaft, 22-tensioning structure, 221-first sleeve, 2211-conical inner wall, 2212-first lug, 222-second sleeve, 2221-second lug, 2222-screw, 2223-conical surface, 2224-annular conical part, 223-conical fixing part, 23-damping part, 231-limiting surface, 24-limiting structure, 241-limiting part, 2411-half-waist-shaped groove, 2412-groove, 3-base mechanism, 31-convex bead, 32-base, 33-support frame, 34-bearing, 35-pin, 36-magnet, 4-pressure bar mechanism, 41-pressure bar, 42-connecting bar, 43-tension spring, 5-picture and text machine, 51-conveyor belt, 52-sensor.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

The embodiment of the utility model provides a coiled material feeding device, which is shown in a combined figure 1, a figure 2 and a figure 11 and comprises a roller mechanism 2, a base mechanism 3 and a pressure lever mechanism 4; the roller mechanism 2 is used for bearing the coiled material 1, the coiled material 1 is provided with a shaft hole 11, and the coiled material 1 is fixed on the roller mechanism 2 through the shaft hole 11; the base mechanism 3 is used for supporting the roller mechanism 2 so that the roller mechanism 2 can be emptied to rotate; in addition, the base mechanism 3 is detachably arranged on the image-text machine 5, and when the base mechanism is arranged on the image-text machine 5, the coiled material feeding equipment can be used on the image-text machine 5 to complete the processing of the coiled material 1, and when the base mechanism is detached from the image-text machine 5, other functions of the image-text machine 5 are not influenced, so that the image-text machine 5 can complete the processing of the plate; the compression bar mechanism 4 compresses one end of the coiled material 1 on the conveyor belt 51 of the image-text machine 5, and when the conveyor belt 51 operates, the friction force between the coiled material 1 and the conveyor belt 51 is utilized to drive the coiled material 1 to rotate and discharge, so as to drive the roller mechanism 2 to rotate.

With reference to fig. 2, fig. 3, fig. 11 and fig. 12, the roller mechanism 2 includes the rotating shaft 21 penetrating through the shaft hole 11, the rotating shaft 21 is provided with the tensioning structure 22, the tensioning structure 22 includes the first sleeve 221 sleeved outside the rotating shaft 21, the outer wall of the first sleeve 221 is connected with the second sleeve 222, the inner wall is connected with the tapered fixing member 223, the outer wall of the second sleeve 222 abuts against the inner wall of the shaft hole 11, when the first sleeve 221 and the second sleeve 222 are fixed to each other, the tapered fixing member 223 tightly embraces the rotating shaft 21, and mutual fixation of the coiled material 1 and the rotating shaft 21 is realized.

As shown in fig. 12 and 17, the first sleeve 221 is in threaded connection with the second sleeve 222, the first sleeve 221 has a tapered inner wall 2211 matched with the tapered fixing piece 223, and the tighter the first sleeve 221 and the second sleeve 222 are screwed to each other, the more inward the first sleeve 221 radially presses the tapered fixing piece 223, so that the smaller the diameter of the tapered fixing piece 223 is until the tapered fixing piece 223 embraces the rotating shaft 21. When the first sleeve 221 and the second sleeve 222 are screwed to each other, the tapered fixing member 223 embraces the rotary shaft 21, thereby restricting the position of the coil 1 in the axial direction of the rotary shaft 21.

The conical fixing member 223 is an open-loop annular conical fixing member, the change of the diameter size of the conical fixing member 223 is realized through the change of the open-loop distance, when the open-loop distance is zero, that is, the conical fixing member 223 is a closed-loop structure, the diameter of the conical fixing member 223 is the minimum diameter at the moment, the outer diameter of the rotating shaft 21 is not smaller than the minimum diameter, otherwise, the tensioning structure 22 cannot fix the rotating shaft 21.

As shown in fig. 14, 16 and 17, the outer wall of the first sleeve 221 is uniformly provided with a plurality of first protrusions 2212, and the outer wall of the second sleeve 222 is uniformly provided with a plurality of second protrusions 2221, so that the fingers of two hands of a person can respectively act on the first protrusions 2212 and the second protrusions 2221, thereby screwing the first sleeve 221 and the second sleeve 222 together.

In this embodiment, the second sleeve 222, the first sleeve 221 and the conical fixing piece 223 are arranged to be matched with each other, so that the coil 1 and the rotating shaft 21 are fixed fast, and the production efficiency is improved; through setting up detachable base mechanism 3 for this coiled material feeding equipment can regard as independent detachable equipment, and this coiled material feeding equipment can directly use on current picture and text machine 5 that is used for panel processing, reforms transform under the lower condition of cost at picture and text machine 5, just can realize the processing of panel on same picture and text machine 5, can realize coiled material 1's processing again, and the commonality is strong, helps marketing.

In addition, since the first sleeve 221 and the second sleeve 222 need to be assembled and disassembled frequently to replace the coil 1, the threads on the first sleeve 221 or the second sleeve 222 are very easily damaged, and in order to reduce the replacement cost of the first sleeve 221 or the second sleeve 222, in the present embodiment, as shown in fig. 13 and 15, the second sleeve 222 is detachably provided with the threaded member 2222, the outer wall of the threaded member 2222 is fixedly connected with the second sleeve 222, and the inner wall of the threaded member 2222 is provided with the threads, wherein the first sleeve 221 is connected with the threaded member 2222 through the threads on the outer wall thereof, so as to indirectly achieve the mutual fixation of the first sleeve 221 and the second sleeve 222. In addition, the screw 2222 may be alternatively provided on the first sleeve 221.

As shown in fig. 3, the number of the tension structures 22 is two, and the two tension structures are respectively arranged at the left end and the right end of the rotating shaft 21, so that the two ends can be simultaneously controlled, and the coil 1 can be more firmly fixed on the rotating shaft 21.

As shown in fig. 4, the base mechanism 3 is detachably fixed on the image-text machine 5 through a magnet 36 of the magnetic gauge stand, the magnet 36 is provided with a switch, whether the base mechanism 3 is magnetically attracted on the image-text machine 5 is realized through a change-over switch, and the detachable connection structure is simple and is convenient to control.

Preferably, as shown in fig. 3 to 6, the base mechanism 3 includes a base 32 and support frames 33 fixed to left and right sides of the base 32, two bearings 34 are provided at an upper end of each support frame 33, and the rotating shaft 21 is placed on the bearings 34.

The supporting frame 33 has a certain height, and can empty and support the roller mechanism 2, so that the roller mechanism 2 can be fixed above the base 32, and the roller mechanism 2 can smoothly rotate; the two bearings 34 are arranged on the inner side surface of the support frame 33, the upper end of the support frame 33 is also provided with a groove, the position of the groove is matched with the positions of the two bearings 34 and is positioned between the two bearings 34, and the groove can prevent the rotating shaft 21 from falling off the support frame 33; the outer wall of the rotating shaft 21 abuts against the two bearings 34, but does not contact with the grooves, which helps to reduce the wear of the rotating shaft 21 and enables smooth rotation.

Preferably, as shown in fig. 9 and 10, the teletext machine 5 is provided with a switch or sensor 52 for switching the mode of operation, and the base mechanism 3 is provided with a pin 35 cooperating with the switch or sensor 52.

The switch or the sensor 52 is used for switching the working mode of the circuit, the working mode comprises a plate processing mode and a coil processing mode, when the coil feeding equipment is installed on the image-text machine 5, the pin 35 can press the switch or the sensor 52, the working mode is switched to the coil processing mode, the coil processing is realized on the image-text machine 5, when the coil feeding equipment is detached from the image-text machine 5, the pin 35 is also separated from the switch or the sensor 52, the switch or the sensor 52 is reset, the working mode is switched to the plate processing mode at the moment, and the image-text machine 5 can still process the plate.

The pin 35 not only triggers the switch or sensor 52, but also serves to position the base 32 so that the base 32 can be correctly mounted on the machine 5 for subsequent coil processing. The bottom plate of the machine 5 for supporting the base 32 is used for carrying the sheet material in the sheet material processing mode, and can be automatically reset to the initial position when the coil feeding device is withdrawn from the machine 5, so as to facilitate the subsequent sheet material processing and production.

Preferably, as shown in fig. 1 and 2, the pressing rod mechanism 4 includes a pressing rod 41 for pressing the coiled material onto the conveyor belt 51, a connecting rod 42 is connected to each end of the pressing rod 41, the pressing rod 41 is hinged to the base mechanism 3 through the connecting rod 42, and a tension spring 43 for tensioning the pressing rod 41 is further connected to the connecting rod 42.

One end of the tension spring 43 is connected with the base mechanism 3, and the other end is connected with the middle part of the connecting rod 42, so that a downward tension is provided for the pressure lever 41; the pressing rod 41 is hinged on the base mechanism 3, so that the pressing rod 41 can rotate around the base mechanism 3, and external force is applied to enable the pressing rod 41 to be lifted and separated from the conveying belt 51, so that the coiled material 1 is conveniently taken down, or the coiled material 1 is placed on the conveying belt 51 in advance, and the coiled material 1 is conveniently pressed by the subsequent pressing rod 41.

The pressing rod 41 is a rubber coating pipe, an inner core of the rubber coating pipe is iron, rubber is injected outside the iron, the rubber can increase the friction force between the pressing rod 41 and the coiled material 1, slipping is prevented, when the conveying belt 51 rolls, the coiled material 1 is discharged forwards along with the conveying belt 51, and therefore processing and production of the coiled material 1 are completed.

Preferably, as shown in fig. 11 and 16, the outer wall of the second sleeve 222 has a tapered surface 2223, and the tapered surface 2223 abuts against the inner wall of the shaft hole 11.

The tapered surface 2223 has a guiding function, so that the second sleeve 222 can be quickly inserted into the axial hole 11 of the coil stock 1; the maximum diameter of the tapered surface 2223 is larger than the inner diameter of the shaft hole 11, so that the tapered surface 2223 can be tightly attached to the inner wall of the shaft hole 11, and the second sleeve 222 and the coiled material 1 can be fixed to each other; the minimum diameter of the tapered surface 2223 is smaller than the inner diameter of the shaft hole 11 so that the second sleeve 222 can be smoothly inserted into the shaft hole 11.

Preferably, as shown in fig. 14, 15 and 16, an annular taper 2224 is detachably attached to the outer wall of the second sleeve 222.

This is because the coil stock 1 has various specifications and thus the inside diameter of the shaft hole 11 of the coil stock 1 has various sizes, and thus the annular tapered member 2224 is detachably provided so that the second sleeve 222 can fix the coil stock 1 having different inside diameters of the shaft hole 21, enhancing the versatility of the coil stock feeding apparatus.

The inner wall and the outer wall of the annular conical part 2224 are both conical surface structures, the conical surface structure of the inner wall is matched with the conical surface 2223 of the second sleeve 222, the conical surface structure of the outer wall is abutted against the inner wall of the shaft hole 11 of the coiled material 1, and the second sleeve 222 can be conveniently and rapidly inserted into the shaft hole 11 of the coiled material 1; similarly, the maximum diameter of the annular tapered part 2224 is larger than the inner diameter of the shaft hole 11, so as to ensure that the annular tapered part 2224 can be tightly attached to the inner wall of the shaft hole 11, thereby fixing the second sleeve 222 and the coiled material 1; the annular tapered member 2224 has a minimum diameter smaller than the inner diameter of the shaft hole 11 so that the second sleeve 222 can be smoothly inserted into the shaft hole 11.

In this embodiment, the annular tapered part 2224 is additionally arranged outside the second sleeve 222, so that the outer diameter of the second sleeve 222 is adjustable, and the sleeve is suitable for the inner diameters of the shaft holes 11 of various coiled materials 1, and has strong universality.

Preferably, as shown in fig. 3, the roller mechanism 2 further includes a damper 23 for preventing the roller mechanism 2 from freely rotating, the damper 23 being provided at both ends of the rotating shaft 21.

Wherein, the rolling resistance of pivot 21 can be increased to damping piece 23 to when the external force was cancelled (during conveyer belt 51 stall promptly), the inertial motion of offsetting roller mechanism 2 for pivot 21 can stall at once, thereby makes the material of coiled material 1 can not loosen and collapses, thereby makes coiled material 1 can be in the state of tightening always, so that realize orderly ejection of compact, prevents to produce the fold, has guaranteed the processing qualification rate of coiled material 1.

The damping piece 23 comprises a tightening shaft, a spring and a deformation pressing piece, wherein the deformation pressing piece is sleeved outside the rolling shaft 21, when the tightening shaft is screwed inwards, the spring is stressed to press the deformation pressing piece inwards, and the deformation pressing piece tightly holds the rotating shaft 21 after being deformed, so that the friction force between the damping piece 23 and the rotating shaft 21 is increased, and the rotating shaft 21 is prevented from being stopped in time due to the inertia effect.

Preferably, as shown in fig. 2, fig. 5, fig. 7 and fig. 8, the drum mechanism 2 is further provided with a limiting structure 24 for fixing the damping member 23 to the base mechanism 3, the limiting structure 24 includes a limiting member 241 connected to the base mechanism 3, the limiting member 241 is provided with a semi-waist-shaped groove 2411, and the damping member 23 is provided with a limiting surface 231 matched with the semi-waist-shaped groove 2411.

The two limiting surfaces 231 are planes, and the two limiting surfaces 231 are symmetrically arranged on two sides of the outer wall of the damping piece 23; half waist type groove 2411 has the semicircle arc surface section and connects the plane section at semicircle arc surface section both ends, spacing face 231 and the plane section butt in semicircle arc surface section 2411 to take place rotation each other between restriction damping piece 23 and the base mechanism 3, damping piece 23 rotates along with pivot 21 when preventing coiled material 1 to rotate, thereby has effectively guaranteed damping piece 23 limiting displacement to pivot 21.

Preferably, as shown in fig. 5 to 7, one end of the limiting member 241 is hinged to the base mechanism 3, the other end of the limiting member is provided with a groove 2412, and the base mechanism 3 is provided with a convex bead 31 engaged with the groove 2412.

When the limiting surface 231 of the damping member 23 is adjusted to the vertical direction, the limiting member 241 can smoothly clamp the damping member 23, and after the limiting member 241 and the damping member 23 are clamped in place, the convex bead 31 on the base mechanism 3 can be just matched with the groove 2412 on the limiting member 241, so that the purpose of locking the limiting member 241 is achieved, the position of the damping member 23 is more effectively limited, and the coiled material feeding device can normally work.

When the roller mechanism 2 needs to be dismounted, only a small external force needs to be applied to the limiting part 241, the convex bead 31 and the groove 2412 can be separated from each other, so that the limiting part 241 is easily opened, the damping part 23 is separated from the constraint of the limiting part 241, then the roller mechanism 2 is dismounted from the base mechanism 3, and the dismounting work of the roller mechanism 2 is completed.

In this embodiment, the limiting member 241 is provided with a hinge structure and a structure matching the convex bead 31 and the groove 2412, so that the roller mechanism 2 can be conveniently and rapidly mounted on the base mechanism 3, or the roller mechanism 2 can be rapidly dismounted from the base mechanism 3, and the processing efficiency of the coiled material 1 can be improved.

Another embodiment of the utility model provides an image-text machine, including the aforesaid coiled material feeding equipment.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims

1. A coil feeding apparatus, comprising:

the roller mechanism (2) is used for bearing a coiled material (1) with a shaft hole (11), the roller mechanism (2) comprises a rotating shaft (21) arranged in the shaft hole (11) in a penetrating mode, a tensioning structure (22) is arranged on the rotating shaft (21), the tensioning structure (22) comprises a first sleeve (221) sleeved outside the rotating shaft (21), the outer wall of the first sleeve (221) is connected with a second sleeve (222), the inner wall of the first sleeve is connected with a conical fixing piece (223), the outer wall of the second sleeve (222) is abutted to the inner wall of the shaft hole (11), and when the first sleeve (221) and the second sleeve (222) are fixed to each other, the conical fixing piece (223) tightly holds the rotating shaft (21) to achieve mutual fixing of the coiled material (1) and the rotating shaft (21);

the base mechanism (3) is used for supporting the roller mechanism (2) to rotate, and the base mechanism (3) is detachably arranged on the image-text machine (5);

and the pressure lever mechanism (4) is used for driving the roller mechanism (2) to rotate, and the pressure lever mechanism (4) is matched with a conveying belt (51) of the image-text machine (5) for use.

2. The coil feeding apparatus as claimed in claim 1, wherein the base mechanism (3) comprises a base (32) and support frames (33) fixed to left and right sides of the base (32), two bearings (34) are provided at an upper end of each support frame (33), and the rotary shaft (21) is placed on the bearings (34).

3. The coil feeding device according to claim 1, characterized in that the pressing rod mechanism (4) comprises a pressing rod (41) for pressing the coil material on the conveyor belt (51), two ends of the pressing rod (41) are respectively connected with a connecting rod (42), the pressing rod (41) is hinged on the base mechanism (3) through the connecting rod (42), and the connecting rod (42) is also connected with a tension spring (43) for tensioning the pressing rod (41).

4. The coil feeding apparatus as set forth in claim 1, wherein the outer wall of the second sleeve (222) has a tapered surface (2223), the tapered surface (2223) abutting against the inner wall of the shaft hole (11).

5. The coil feeding apparatus as set forth in claim 1, wherein an annular taper (2224) is removably attached to an outer wall of the second sleeve (222).

6. A coil feeding device according to any one of claims 1-5, characterized in that the roller means (2) further comprises damping members (23) for preventing the roller means (2) from freely rotating, the damping members (23) being provided at both ends of the rotary shaft (21).

7. The coil feeding device according to claim 6, wherein the roller mechanism (2) further comprises a limiting structure (24) for fixing the damping member (23) to the base mechanism (3), the limiting structure (24) comprises a limiting member (241) connected to the base mechanism (3), the limiting member (241) is provided with a half-waist-shaped groove (2411), and the damping member (23) is provided with a limiting surface (231) matched with the half-waist-shaped groove (2411).

8. The coil feeding device according to claim 7, wherein one end of the limiting member (241) is hinged to the base mechanism (3), the other end is provided with a groove (2412), and the base mechanism (3) is provided with a convex bead (31) matched with the groove (2412).

9. A web-fed machine, characterized in that it comprises a web-feeding device according to any one of claims 1-8.

10. Teletext machine according to claim 9, characterized in that a switch or sensor (52) for switching the operating mode is provided on the teletext machine (5), and that the base mechanism (3) is provided with a pin (35) cooperating with the switch or sensor (52).