CN220765993U - Coiled material coreless split-coil nailing machine - Google Patents

Abstract

The utility model relates to a coreless coiled material uncoiling nailing machine which comprises a wire arranging device, a buffer device, a traction device, a coiling device, a shearing device, a nailing device, a pressing wheel device and a receiving disc, wherein flattening of coiled materials, buffering of coiled materials, traction of coiled materials, uncoiling and coiling of coiled materials, shearing of coiled materials after uncoiling and coiling, nailing and sealing after uncoiling and coiling, pressing wheels during uncoiling and coiling and blanking after uncoiling and coiling are respectively realized. The coil stock device is used for limiting coiled materials to realize the coreless coiling and uncoiling function, and the nailing device is used for replacing the rubberizing device to solve the problem of rubberizing stability, so that the coil stock coreless coiling nailing machine with reliable structure and stronger stability is realized.

Description

Coiled material coreless split-coil nailing machine

Technical Field

The utility model relates to the technical field of coiled material separation, in particular to a coiled material coreless separation nailing machine.

Background

A coil separator (non-adhesive material tape) is an apparatus for separating and winding a coil of a large-diameter coil into coils of a plurality of small-diameter coils, wherein the coil separating, shearing and sub-packaging are involved, and a coil separator commonly used at present is, for example, chinese patent publication No. CN214795592U, which provides an automatic coil separating device for sub-packaging a coil of a large-diameter coil into a plurality of small-diameter coils, the automatic coil separating device includes a winding station, and the automatic coil separating device further includes: the cutting device is used for cutting off the coiled material after the small-diameter winding drum is packaged, the adhesive tape pasting device is used for pasting adhesive tape on the tail end of the cut coiled material, the tail pressing roller device is used for pasting the tail end of the coiled material to the small-diameter winding drum, and the integrated turret and the turret driver are integrated, and the turret driver enables the integrated turret to move in a direction away from or close to the winding station. According to the prior art, after the fixed-length coiling of the automatic coiling device is completed, the turret driver drives the integrated turret to approach the coiling station, so that the cutting device, the adhesive tape pasting device and the tail material compression roller device arranged on the integrated turret complete the coiling work of the small-diameter coiling block, manual operation of operators is not needed, the coiling efficiency is improved, and potential safety hazards are eliminated; but this prior art has too simple structure, poor reliability and stability, and if the adhesive tape in the adhesive tape sticking device is poor in adhesive tape sticking effect, the adhesive tape sticking position cannot be stabilized, and sticking errors are easy to occur.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a coiled material coreless coiled nailing machine which is reliable in structure and high in stability.

The embodiment of the utility model provides a coiled material coreless and coiled-material dividing nailing machine, which comprises a wire arranging device, a wire arranging device and a wire arranging device, wherein the wire arranging device is used for flattening coiled materials; the buffer device is coupled with the wire arranging device and is used for receiving coiled materials; the traction device is coupled with the buffer device and is used for traction of the coiled material through clamping so as to advance unreeling; the coiling device is coupled with the traction device and is used for receiving the coiled material pushed by the limiting traction device and coiling the coiled material in a rotating mode; the material shearing device is coupled with the material coiling device and the traction device and is used for shearing the coiled material coiled by the material coiling device to the traction device; and the nailing device is coupled with the coil stock device and is used for binding and fixing nails at the tail end of the coiled material coiled by the coil stock device so as to fix the coiling effect. The beneficial effects of above-mentioned technical scheme are that through whole reasonable line device, buffer unit, draw gear, coil stock device, cut material device and nailing device realization to the function of dividing into the roll of big, and buffer unit can play unreels in advance to the coiled material, effectively avoid causing the coil to unreel the poor defect of flattening effect because of draw gear and reason line device appear asynchronism, and draw gear can cooperate the coil stock device to realize reliable and stable pay-off and cut the material, the problem of coreless roll division and the problem of unable exhibition when cutting the material have been solved in the cooperation effectively, and the coil stock device provides the spacing of coiled material and realize coreless roll division's function, thereby realize reliable structure and stronger coiled material coreless roll dividing nailing machine of stability.

In some of these embodiments, the coil stock apparatus includes a rotary drive for driving the coil stock cartridge to stop the coil stock, a telescoping drive for driving the coil stock cartridge to rotate to effect the rolling of the coil stock, and a coil stock cartridge. The technical scheme has the beneficial effects that the carrying and the withdrawing are realized through the telescopic coil stock clamping head, and the coiled material is placed in the coil stock clamping head, so that the coreless rolling function can be realized.

In some embodiments, the nailing device comprises a nailing driver, a vibration disc, a feeder, a pressing driver, a pressing rod and a nailing head, wherein the nailing driver controls the nailing head to move into the coiling device, the feeder is used for feeding nails sent by the vibration disc into the nailing head, and the pressing driver is used for driving the pressing rod to press against the surface of coiled materials in the coiling device so as to pre-fix the coiling effect. The technical scheme has the beneficial effects that nails are bound on the tail end of the coiled material of the small coil through the nailing heads so as to realize sealing, and the reliability and stability of rubberizing are greatly improved.

In some embodiments, a pinch roller device is coupled to the roll-up device for defining a width of the roll-up. The pinch roller device comprises a pinch roller driver and a pressure plate, and the pressure plate is controlled by the pinch roller driver to stretch and retract to adjust the width of the winding. The technical scheme has the beneficial effects that the rolling width is limited in advance through the pinch roller device, so that the problem of rolling errors can be effectively avoided.

In some embodiments, the buffer device comprises a buffer bracket, a fixed roller arranged at the upper part of the buffer bracket, and a movable roller arranged at the lower part of the buffer bracket, wherein the movable roller is assembled on a sliding rod longitudinally arranged between the upper part and the lower part of the buffer bracket in a lifting and sliding manner through a sliding block. The beneficial effect of above-mentioned technical scheme is that adopts the cooperation of movable roller and fixed roller in order to buffer the coiled material of certain length through buffer memory device.

In some embodiments, the device further comprises a receiving tray coupled to the coiling device for receiving the coiled material falling from the coiling device. The technical scheme has the beneficial effects that the collection of small rolls which are separated is realized through the material receiving disc, and automatic blanking is realized.

In some of these embodiments, the traction device includes a traction drive, a slide rail, a slide table, a collet drive, and a traction collet, the collet drive being mounted on the slide table, the slide table being slidably mounted on the slide rail, the traction drive being for driving the slide table to slide along the slide rail, and the collet drive being for driving the traction collet to grip and release. The technical scheme has the beneficial effects that the retraction of the coil stock after feeding is realized through the position of the traction driver on the traction chuck, and the reliability and the stability of the structure are improved.

The details of one or more embodiments of the utility model are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the other features, objects, and advantages of the utility model.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is a structural view of a coil coreless split-coil nailing machine of the present utility model.

Fig. 2 is a block diagram of a wire management device according to an embodiment of the present utility model.

Fig. 3 is a block diagram of a buffer device according to an embodiment of the present utility model.

Fig. 4 is a block diagram of a traction device according to an embodiment of the present utility model.

Fig. 5 is a structural view of a coil stock apparatus according to an embodiment of the present utility model.

Fig. 6 is a structural view of a material shearing device according to an embodiment of the present utility model.

Fig. 7 is a structural view of a nailing device according to an embodiment of the present utility model.

Figure 8 is a block diagram of a puck assembly according to an embodiment of the present utility model.

In the figure, 1, a wire arranging device; 2. a buffer device; 3. a traction device; 4. a coiling device; 6. a material shearing device; 7. a nailing device; 8. a pinch roller device; 9. a receiving tray; 10. a wire management driver; 11. a rotating shaft; 12. a center mount; 13. a support plate; 14. a buffer support; 15. a fixed roller; 16. a movable roller; 17. a slide block; 18. a slide bar; 19. a traction drive; 20. a slide rail; 21. a sliding table; 22. a chuck driver; 23. a traction chuck; 24. a rotary driver; 25. a telescopic drive; 26. a coil chuck; 27. a nailing driver; 28. a pressing driver; 29. beating the nail head; 30. a pressing rod; 31. a feeder; 32. a vibration plate; 33. a shearing driver; 34. a pair of scissors; 43. a pinch roller driver; 44. and (3) pressing a plate.

Detailed Description

The present utility model will be described and illustrated with reference to the accompanying drawings and examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments provided by the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by those of ordinary skill in the art that the described embodiments of the utility model can be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "a," "an," "the," and similar referents in the context of the utility model are not to be construed as limiting the quantity, but rather as singular or plural. The terms "comprising," "including," "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in connection with the present utility model are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein means greater than or equal to two. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., "a and/or B" may mean: a exists alone, A and B exist together, and B exists alone. The terms "first," "second," "third," and the like, as used herein, are merely distinguishing between similar objects and not representing a particular ordering of objects.

As shown in fig. 1, the embodiment of the utility model provides a coreless coiled material uncoiling nailing machine, which comprises a wire arranging device 1, a buffer device 2, a traction device 3, a coiling device 4, a shearing device 6, a nailing device 7, a pressing wheel device 8 and a receiving disc 9, wherein flattening of coiled materials, buffering of coiled materials, traction of coiled materials, uncoiling and coiling of coiled materials, shearing after uncoiling and coiling, nailing and sealing after uncoiling and coiling, pressing wheels during uncoiling and coiling and discharging after uncoiling and coiling are respectively realized. According to the coil winding and unwinding nailing machine, the functions of dividing a large coil into small coils are achieved through the whole wire arranging device 1, the buffer device 2, the traction device 3, the coil winding device 4, the shearing device 6 and the nailing device 7, the buffer device 2 can be used for pre-unwinding the coil, the defect that the coil unwinding and flattening effects are poor due to the fact that the traction device 3 and the wire arranging device 1 are asynchronous is effectively avoided, the traction device 3 can be matched with the coil winding device 4 to achieve stable and reliable feeding and shearing, the problem of coreless coil separation and the problem that the coil cannot be flattened during shearing are effectively matched with each other, the coil winding device 4 is used for limiting the coil to achieve the coreless coil separation, the nailing device 7 is used for replacing the rubberizing device, and therefore the coreless coil winding and nailing machine with reliable structure and high stability is achieved.

As shown in fig. 1-2, the wire arranging device 1 of the present embodiment is used for flattening a coil. The wire arranging device 1 comprises a wire arranging driver 10, a rotating shaft 11, a central mounting piece 12 and a plurality of supporting plates 13, wherein the supporting plates 13 are radially assembled on the central mounting piece 12 to form an unreeling frame, the central mounting piece 12 is locked on the rotating shaft 11, and the rotating shaft 11 is controlled by the wire arranging driver 10 to rotate. Specifically, the center mounting member 12 is in a hexagonal shape, an inner mounting hole is respectively provided on each surface, and an outer mounting hole is respectively provided on each support plate 13, so that each surface of the center mounting member 12 is provided with a support plate 13 through the assembly of the inner mounting hole and the outer mounting hole, the six support plates 13 are radially assembled into a whole, and the coiled material is unwound through the perforation of the support plate 13.

As shown in fig. 1 and 3, the buffer device 2 of the present embodiment is coupled to the wire arranging device 1, and is used for receiving a coil. The buffer device 2 comprises a buffer support 14, three groups of fixed rollers 15 arranged at the upper part of the support, and a movable roller 16 arranged at the lower part of the buffer support 14, wherein the movable roller 16 is assembled on a sliding rod 18 longitudinally arranged between the upper part and the lower part of the buffer support 14 in a lifting and sliding manner through a sliding block 17. The present embodiment employs the cooperation of the movable roller 16 and the fixed roller 15 to buffer a length of web material by the buffer device 2. The coiled material is discharged from the wire arranging device 1 and then wound on one of the fixed rollers 15, then wound on the movable roller 16, finally wound on the other two fixed rollers 15, the coiled material is pulled by the traction device 3 in the process of pulling and pushing the coiled material, the movable roller 16 is lifted along the sliding rod 18 to a certain extent, the coiled material behind the movable roller 16 can be pulled and pushed by the traction device 3, the coiled material in front of the movable roller 16 can be temporarily not unreeled, the pulling force of the coiled material on the movable roller 16 is lost due to the stopping traction of the traction device 3 after the movable roller 16 is lifted to a certain height, then the movable roller 16 descends and resets along the sliding rod 18 under the action of gravity, at the moment, the coiled material behind the movable roller 16 is not pushed any more, the coiled material in front of the movable roller 16 is pulled in the descending process, the wire arranging device 1 is matched with the rotary unreeled at the same time, and the lifting height is perceived by the position sensor in the descending process of the movable roller 16, so that the wire arranging device 1 starts unreeled.

As shown in fig. 1 and 4, the drawing device 3 of the present embodiment is coupled to the buffer device 2 for drawing the web by clamping to advance unreeling. The traction device 3 includes a traction driver 19, a slide rail 20, a slide table 21, a collet driver 22 and a traction collet 23, the collet driver 22 is mounted on the slide table 21, the slide table 21 is slidably mounted on the slide rail 20, the traction driver 19 is used for driving the slide table 21 to slide along the slide rail 20, and the collet driver 22 is used for driving the traction collet 23 to clamp and unclamp, the collet driver 22 includes an upper collet driver 22 and a lower collet driver 22, and the traction collet 23 includes an upper collet and a lower collet, the upper collet driver 22 controls the upper collet, the lower collet driver 22 controls the lower collet, clamping and unclamping of the coiled material is achieved by controlling opening and closing of the upper collet and the lower collet, and the upper collet and the lower collet are provided in an elongated shape structure. When the traction starts, the traction chuck 23 is driven by the chuck driver 22 to clamp the coiled material, after clamping, the traction driver 19 drives the traction chuck 23 to horizontally slide to the rear of the coil chuck 26 along the sliding rail 20 (the coil chuck 26 does not extend at the moment), the coiled material is in a straight state at the moment, after the coil chuck 26 extends to limit the coiled material, the chuck driver 22 drives the traction chuck 23 to loosen the clamping of the coiled material, and because the distance between the upper chuck and the lower chuck after the upper chuck is loosened is larger than the outer diameter of the coil chuck 26, the traction chuck 23 is reset across the coil chuck 26 along the sliding rail 20 under the action of the traction driver 19, the loosening of the traction chuck 23 is kept after the reset, and the next clamping time of the traction chuck 23 is after the completion of coiling.

As shown in fig. 1 and 5, the coil stock device 4 of the present embodiment is coupled to the traction device 3, and is configured to receive the coil stock pushed by the limiting traction device 3 and to reel the coil stock in a rotating manner. The coil stock device 4 comprises a rotary driver 24, a telescopic driver 25 and a coil stock chuck 26, wherein the telescopic driver 25 is used for driving the coil stock chuck 26 to extend to limit a coil stock, discharging and feeding the coil stock after retracting, and the rotary driver 24 is used for driving the coil stock chuck 26 to rotate so as to realize the coiling of the coil stock. The present embodiment achieves a coreless roll-up function by providing a carry and retract position through the retractable roll cartridge 26, with the roll being positioned within the roll cartridge 26. The coil stock chuck 26 is made up of two semicircle rollers, a gap is provided between the semicircle rollers, the gap is used for accommodating the coiled material which is drawn and fed, the trend of the gap is consistent with the trend of the coiled material so that the coiled material can smoothly enter the gap, thereby limiting the coiled material. In order to enhance the positioning of the coiled material, the inclined guide seat is arranged, so that the two semicircular rollers are close to each other due to the inclined guide of the inclined guide seat in the extending process, and the gap is reduced until the coiled material is clamped and positioned.

As shown in fig. 1 and 6, the material shearing device 6 of the present embodiment is coupled to the material coiling device 4 and the traction device 3, and is used for shearing the coiled material coiled by the material coiling device 4 between the coiled material and the traction device 3. The material shearing device 6 comprises a material shearing driver 33, a shearing tool 34 and a shearing tool 34 driver, wherein the material shearing driver 33 drives the shearing tool 34 and the shearing tool 34 to stretch out and retract after shearing materials. When cutting the material, the traction device 3 clamps and positions the coiled material, and the rubberizing device 7 clamps and positions the coiled material (rubberizing is carried out simultaneously).

As shown in fig. 1 and 7, the nailing driver 27, the vibration plate 32, the feeder 31, the pressing driver 28, the pressing bar 30, and the nailing head 29 of the present embodiment, the nailing driver 27 controls the nailing head 29 to move into the coiling device, the feeder 31 is used for feeding nails sent out by the vibration plate 32 into the nailing head 29, and the pressing driver 28 is used for driving the pressing bar 30 to press against the surface of the coiled material in the coiling device to pre-fix the coiling effect. This embodiment binds the nails to the end of the coil of the small roll by driving the heads 29 to effect the sealing, greatly improving the reliability and stability of the tape. After the coiling device is coiled to a certain degree, the coiling is stopped, the pinch roller device 8 is loosened, the pressing driver 28 drives the pressing rod 30 to move to press against the surface of the coiled material, then the material shearing device shears materials, the feeder 31 takes materials from the vibrating disc 32 and then sends nails into the nailing head 29, after receiving the nails, the nailing head 29 is driven to move to the surface of the coiled material by the nailing driver 27 and bind the nails on the coiled material, and then the nailing head 29 is reset, the pressing rod 30 is reset, the coiling chuck is reset, and the nailed coiled material falls to the receiving disc.

As shown in fig. 1 and 8, the pinch roller device 8 of the present embodiment is coupled to the roll-up device 4 for defining the width of the roll-up. The pinch roller device 8 comprises a pinch roller driver 43 and a pressure plate 44, the pressure plate 44 controls the expansion process by the pinch roller driver 43 to adjust the rolling width, and after the rolling is finished, the pressure plate 44 is opened to allow the nailing device 7 to have a propelling space. The rolling width is limited before the pinch roller device 8, so that the problem of rolling errors can be effectively avoided.

As shown in fig. 1, the receiving tray 9 of the present embodiment is coupled to the coiling device 4, and is configured to receive coiled materials that fall from the coiling device 4 after coiling. In the embodiment, the collection of small rolls which are separated is realized through the receiving tray 9, and the automatic blanking is realized.

The working principle of the embodiment of the utility model is as follows: the coiled material is flattened in the wire arranging device 1, the coiled material is manually stretched into the forward traction device 3 through the buffer device 2, the traction device 3 is started to clamp the coiled material, the coiled material is pulled and pushed to the rear of the coiled material clamping head 26, the coiled material clamping head 26 stretches out to limit the coiled material, the traction clamping head 23 is released to clamp and reset the coiled material after limiting, the material pressing head 30 stretches out to contact the surface of the coiled material clamping head 26, the coiled material clamping head 26 starts to rotate to roll up, after the coiled material is rolled to a preset length, the coiled material clamping head 26 stops rotating, the traction device 3 starts to clamp the coiled material, the pressing wheel device starts to control the platen to open, then the nailing device 7 starts to control the material pressing rod 30 to move and press the coiled material to be pre-fixed, the coiled material clamping head stops rotating for a certain stroke to shorten the length of the coiled material at the rear end of the nailing position, then the feeder 31 sends nails in the nailing head 29, the nailing head 29 moves and pushes the nails to bind the surface of the coiled material, then the nailing head 29 resets, the material pressing rod 30 resets, the coiled material clamping head 26 starts to rotate, the coiled material clamping head 26 starts to clamp, the small coiled material after the coiling drops onto the receiving disc 9. Generally, the first small roll is not a finished product, and the second small roll is a finished product divided into rolls.

It should be understood by those skilled in the art that the technical features of the above-described embodiments may be combined in any manner, and for brevity, all of the possible combinations of the technical features of the above-described embodiments are not described, however, they should be considered as being within the scope of the description provided herein, as long as there is no contradiction between the combinations of the technical features.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (8)

1. A coreless coil separating nailing machine is characterized by comprising

The wire arranging device (1) is used for flattening coiled materials;

the buffer device (2) is coupled with the wire arranging device (1) and is used for receiving coiled materials;

a traction device (3) coupled with the buffer device (2) for traction of the coiled material by clamping to advance unreeling;

the coiling device (4) is coupled with the traction device (3) and is used for receiving and limiting coiled materials propelled by the traction device (3) and coiling the coiled materials in a rotating mode;

the material shearing device (6) is coupled with the material coiling device (4) and the traction device (3) and is used for shearing the coiled material coiled by the material coiling device (4) between the coiled material coiled by the material coiling device and the traction device (3);

and the nailing device (7) is coupled with the coiling device (4) and is used for binding and fixing nails at the tail end of coiled materials coiled by the coiling device (4) so as to fix the coiling effect.

2. A coreless coil-separating nailing machine as claimed in claim 1, wherein the coil stock device (4) comprises a rotary driver (24), a telescopic driver (25) and a coil stock chuck (26), the telescopic driver (25) being used for driving the coil stock chuck (26) to limit the coil stock, the rotary driver (24) being used for driving the coil stock chuck (26) to rotate to realize the coiling of the coil stock.

3. A coreless split coil nailing machine as claimed in claim 1 wherein the nailing device (7) comprises a nailing driver (27), a vibration disc (32), a feeder (31), a press driver (28), a press bar (30), a nailing head (29), the nailing driver (27) controlling the nailing head (29) to move into the coil device (4), the feeder (31) being for feeding nails fed out of the vibration disc (32) into the nailing head (29), the press driver (28) being for driving the press bar (30) against a coil surface in the coil device (4) to pre-fix a coil effect.

4. A coreless roll nailer as claimed in claim 1, and further comprising pinch roller means (8) coupled to said roll means (4) for defining the width of the roll.

5. A coreless roll nailer as claimed in claim 4, wherein said pinch roller means (8) includes a pinch roller driver (43) and a platen (44), said platen (44) being controlled by said pinch roller driver (43) to adjust the width of the roll.

6. The coreless coil-separating nailing machine as claimed in claim 1, wherein the buffer device (2) comprises a buffer bracket (14), a fixed roller (15) arranged on the upper part of the buffer bracket (14), and a movable roller (16) arranged on the lower part of the buffer bracket (14), wherein the movable roller (16) is assembled on a sliding rod (18) longitudinally arranged between the upper part and the lower part of the buffer bracket (14) in a lifting and sliding manner through a sliding block (17).

7. A coreless coil-separating nailing machine as in claim 1 further comprising a receiving tray (9) coupled to the coil assembly (4) for receiving the separated coil dropped from the coil assembly (4).

8. A coreless roll nailer as claimed in claim 1, wherein said traction means (3) comprises a traction drive (19), a slide rail (20), a slide table (21), a collet drive (22) and a traction collet (23), said collet drive (22) being mounted on said slide table (21), said slide table (21) being slidably mounted on said slide rail (20), said traction drive (19) being adapted to drive said slide table (21) to slide along said slide rail (20), and said collet drive (22) being adapted to drive said traction collet (23) to grip and release.