CN220263215U - Loop device and strapping feed system - Google Patents

Abstract

The utility model relates to a loop device, which comprises a loop frame and at least two groups of loop rollers, wherein each loop roller is arranged on the loop frame and is used for limiting a belt conveying channel in the frame, each loop roller comprises a loop roller shaft and a plurality of loop rollers suitable for conveying belts, and each loop roller is arranged on the corresponding loop roller shaft in a penetrating way. A strapping feed system employing the looper is also provided. According to the utility model, the strapping tape passes through the loopers to form the in-frame strapping channel, so that the strapping tape can be stored, the production pace between the upstream strapping tape unreeling and supplying and the downstream strapping operation can be well coordinated, and the smoothness, reliability and safety of the robot strapping operation are improved. The utility model adopts a plurality of loop rollers to form a group of loop rollers, which can obviously prolong the length of a tape running channel in the frame and increase the loop quantity of the loop device.

Description

Loop device and strapping feed system

Technical Field

The utility model belongs to the technical field of bundling equipment, and particularly relates to a loop device and a strapping tape supply system adopting the loop device.

Background

With the development of scientific technology, the heavy packing and bundling work is gradually replaced by a machine, and particularly with the mature development of robot technology, the full-automatic packing and bundling technology is gradually popularized and applied. At present, a strapping unreeling device exists, but a direct-supply strapping robot is adopted after the strapping unreels, so that the production pace between the strapping operation and the strapping unreeling operation is easy to be inconsistent, and the production smooth operation and the production efficiency are affected.

Disclosure of Invention

The utility model relates to a loop device and a strapping feed system using the loop device, which at least can solve part of the defects in the prior art.

The utility model relates to a loop device, which comprises a loop frame and at least two groups of loop rollers, wherein each loop roller is arranged on the loop frame and defines a belt conveying channel in the frame, each loop roller comprises a loop roller shaft and a plurality of loop rollers suitable for conveying belts, and each loop roller is arranged on the corresponding loop roller shaft in a penetrating way.

As one embodiment, each loop roller comprises a fixed loop roller fixedly mounted on the loop frame and a tensioning loop roller mounted on the loop frame, wherein the tensioning loop roller is provided with a tensioning power source.

As one of the embodiments, the loop frame is a vertical loop frame, the tensioning loop roller is arranged below the fixed loop roller, the tensioning power source is a counterweight or an active power source, and the tension of the strapping is adjustable.

As one of the embodiments, the looper device further comprises an inlet guide roller set and an outlet guide roller set which are arranged at two sides of the looper frame, wherein the inlet guide roller set and the outlet guide roller set are respectively limited to form an outer frame travelling channel, and the two outer frame travelling channels are respectively connected with a tape inlet and a tape outlet of the inner frame travelling channel.

As one embodiment, the inlet guide roller set and/or the outlet guide roller set comprises a clamping mechanism for clamping the strapping, which clamping mechanism is arranged on an off-frame deck defined by the corresponding guide roller set.

As one of the implementation modes, the clamping mechanism comprises a clamping seat, a fixed clamping plate fixedly arranged on the clamping seat and a movable clamping plate movably arranged on the clamping seat, wherein the movable clamping plate is provided with a clamping driving structure for driving the movable clamping plate to be close to or far from the fixed clamping plate.

As one embodiment, the inlet guide roller set and/or the outlet guide roller set comprises at least one set of limiting mechanisms; the limiting mechanism comprises a first limiting roller set for carrying out constraint guidance on the strapping surface and a second limiting roller set for carrying out constraint guidance on the strapping edge, the axis of the first limiting roller is parallel to the axis of the guide roller, and the axis of the second limiting roller is perpendicular to the axis of the guide roller.

As one embodiment, the exit guide roller set includes a plurality of exit turn rollers defining an exit side frame outer deck channel therethrough, the exit side frame outer deck channel engaging an exit of the intra-frame deck channel.

As one embodiment, in each outlet turning roll, a part is a fixed turning roll and a part is a swinging turning roll; the swing steering roller comprises a swing roller body and a swing roller frame, wherein the swing roller body is rotatably arranged on the swing roller frame, the swing roller frame is rotatably arranged on a corresponding installation foundation through a swing shaft, and the axis of the swing shaft is perpendicular to the axis of the swing roller body.

The utility model also relates to a strap feeding system comprising a strap unwind unit and a strap feeding unit adapted to be connected to a strapping head of a strapping robot, said strap unwind unit being engaged with said strap feeding unit by means of a loop arrangement as described above.

The utility model has at least the following beneficial effects:

according to the utility model, the strapping tape passes through the loopers to form the in-frame strapping channel, so that the strapping tape can be stored, the production pace between the upstream strapping tape unreeling and supplying and the downstream strapping operation can be well coordinated, and the smoothness, reliability and safety of the robot strapping operation are improved. The utility model adopts a plurality of loop rollers to form a group of loop rollers, which can obviously prolong the length of a tape running channel in the frame and increase the loop quantity of the loop device.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 and 2 are schematic views of a strapping feed system according to an embodiment of the present utility model in a strapping position, wherein fig. 1 and 2 are side and top views, respectively;

fig. 3 and 4 are schematic views illustrating a state of the strap feeding system according to an embodiment of the present utility model in another bundling position, wherein fig. 3 and 4 are side views and top views, respectively;

FIG. 5 is a schematic view of a loop device according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of a strapping conveying unit according to an embodiment of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 5, the present embodiment provides a looper 3 comprising a looper 31 and at least two sets of loopers, each of which is mounted on the looper 31 and defines an intra-frame deck path.

The axes of the looper roll shafts of the looper rolls are parallel, so that the strapping can be ensured to pass through the looper rolls, the in-frame strapping channel is formed, and the strapping is stored.

In one embodiment, the loop device 3 is a vertical loop, and the loop frame 31 may be a vertical frame such as a vertical portal frame. In this embodiment, two sets of loopers are used, which are preferably arranged up and down on the loopers 31.

In one embodiment, as shown in fig. 5, each loop roller includes a loop roller shaft and a plurality of loop rollers adapted for running tape, and each loop roller is disposed on a corresponding loop roller shaft in a penetrating manner. Wherein, adjacent looper rollers can be arranged at intervals or can be arranged in close proximity; the loop roller is preferably a groove roller, can play a role in limiting and restraining a wound strapping, can ensure the reliability of strapping and taking away the strapping, and the shape of a strapping groove can be correspondingly matched and designed according to the width specification of the strapping, for example, a V-shaped groove roller or an H-shaped groove roller is adopted.

In this embodiment, a plurality of loop rollers are used to form a set of loop rollers, so that the length of the tape running channel in the frame can be remarkably prolonged, and the loop amount of the loop device 3 can be increased.

For the looper roller, each looper roller is preferably rotatably arranged on the looper roller shaft, namely in an idler wheel mode, so that friction force between the looper roller and the strapping can be reduced, the strapping is convenient to convey and run, and the service life of the looper roller can be prolonged.

Further preferably, the loop roller shaft is detachably mounted on the loop frame 31, and each loop roller wheel is detachably mounted on the loop roller shaft, so that the installation and maintenance of the loop rollers can be facilitated, in particular, the number of the loop roller wheels can be increased or decreased according to the need, the adjustment of the loop amount is realized, and the use flexibility of the loop device 3 can be effectively improved.

In one embodiment, each loop roller comprises a fixed loop roller 32 fixedly mounted on the loop frame 31 and a tensioning loop roller 33 movably mounted on the loop frame 31, wherein the tensioning loop roller 33 is provided with a tensioning power source 34.

Among these, it is preferable to provide a guide rail on the loop frame 31, on which the tension loop roller 33 is slidably provided, so that the movement of the tension loop roller 33 can be reliably restrained and guided. For the case of a vertical loop, the tensioning loop roller 33 is preferably arranged directly below the fixed loop roller 32, and can be moved up and down on the loop frame 31 so as to be close to or far from the fixed loop roller 32.

In the embodiment, the fixed loop roller 32 and the tensioning loop roller 33 are arranged to cooperate, so that tension can be provided for the strapping, the strapping can be fed and conveyed under the condition of keeping stable tension, and the smoothness and stability of strapping feeding can be ensured; moreover, the distance between the tension loopers 33 and the fixed loopers 32 can be adaptively adjusted along with the working conditions such as the bundling operation progress, and the like, so that the production smoothness and reliability can be remarkably improved.

The multiple windings of the strapping between the fixed loop roller 32 and the tensioning loop roller 33 can achieve a loop amount of N (N.gtoreq.2) times the distance traveled by the tensioning loop roller 33. The loop frame 31 may be provided with a limiting mechanism for limiting the movable stroke of the tensioning loop roller 33, and the limiting mechanism may adopt a conventional limiting manner such as a limiting block, which is not exemplified herein.

For the vertical loop, the tensioning loop roller 33 can adopt a counterweight tensioning mode, namely the configured tensioning power source 34 is a counterweight, and the tensioning force of the strapping can be adjusted by increasing or decreasing the weight of the counterweight. The tensioning power source 34 may also be an active power source, such as a cylinder, a hydraulic cylinder, or the like, or a motor+speed reducer+transmission structure, or the like, and such active power source may be mounted on the loop frame 31.

The tension of the strapping is adjustable through the tensioning power source 34, so that the strapping can be ensured to be in a tensioning state, and the smoothness and reliability of strapping conveying are improved.

In the above-described scheme of fixing the loop roller 32+ tensioning the loop roller 33, both the inlet and the outlet of the in-frame deck are at the fixing the loop roller 32, specifically, the loop roller at one end of the fixing the loop roller 32 forms the inlet of the in-frame deck, and the loop roller at the other end of the fixing the loop roller 32 forms the outlet of the in-frame deck.

Further optimizing the above-mentioned looper 3, as shown in fig. 5, the looper 3 further comprises an inlet guide roller set and an outlet guide roller set arranged at both sides of the looper frame 31, the inlet guide roller set and the outlet guide roller set defining an off-frame deck channel, respectively, the two sets of off-frame deck channels being engaged with the inlet and outlet of the on-frame deck channel, respectively.

The belt fed from the upstream side is guided into the looper 31 via the inlet guide roller group, and the belt fed from the looper 31 is guided downstream via the outlet guide roller group (for example, the belt feeding unit 4 described above).

In one embodiment, as shown in fig. 5, the inlet guide roller set includes a plurality of inlet turn rollers 35, and an inlet side frame outer deck path is defined by the plurality of inlet turn rollers 35, and is engaged with an inlet of the frame inner deck path; for vertical loops, the upstream fed strap may be guided by inlet diverting rollers 35 to cause the strap to be diverted from horizontal to vertical feeding so as to travel to the inlet of the intra-frame walkway at the upper portion of loop frame 31. The inlet turning roll 35 is preferably a fixed turning roll; wherein a portion of the inlet turning rolls 35 may be mounted on a shop basis by means of a roll stand and a portion of the inlet turning rolls 35 may be mounted on a loop stand 31.

In one embodiment, as shown in FIG. 5, the exit guide roll set includes a plurality of exit turn rolls 36, with the plurality of exit turn rolls 36 defining an exit side frame outer deck path that engages the exit of the frame inner deck path; for the scheme that the outlet of the belt conveying channel in the frame is arranged at the upper part of the loop frame 31, the strapping output by the loop frame 31 can be guided by the outlet turning rollers 36 to enable the strapping to descend to approach the workshop foundation, so that the follow-up conveying is facilitated.

In one embodiment, the outlet turning rolls 36 are partially fixed turning rolls and partially swing turning rolls 361; the swing steering roller 361 is preferably located at the outlet of the outer deck channel of the outlet side frame, that is, the swing steering roller 361 is located downstream of each fixed steering roller; because the tie at the outlet side of the loop can twist slightly along with the swing of the binding head, the tie self has micro-deformation, thus torsion impact can be generated on the fixed steering roller, the tie can swing adaptively when being conveyed by arranging the swing steering roller 361 and guiding the tie, the self-adaptive function of the swing steering roller 361 can reduce the impact force of the tie on the steering roller, and the conditions of impact or tie breakage and the like caused by poor smoothness in the tie conveying process on the outlet steering roller 36 are avoided, so that the stable and safe conveying of the tie is realized.

In one embodiment, the swing steering roller 361 includes a swing roller body and a swing roller frame, the swing roller body is rotatably mounted on the swing roller frame, the swing roller frame is rotatably mounted on a corresponding mounting base through a swing shaft, and an axis of the swing shaft is perpendicular to an axis of the swing roller body; the installation foundation can be a workshop foundation or other installation racks.

The steering rollers are the guide rollers of the inlet guide roller group and the outlet guide roller group. Preferably, the roller bodies of the inlet guide roller set and the outlet guide roller set are groove-shaped rollers, so that the roller bodies can limit and restrict the wound strapping, the reliability of strapping can be ensured, and the shape of a strap feeding groove can be correspondingly matched and designed according to the width specification of the strapping, for example, a V-shaped groove roller or an H-shaped groove roller is adopted.

Still preferably, the steering roller is further provided with a limiting structure for preventing the strapping from being separated from the roller body, so that the strapping can be prevented from being separated from the roller body under the condition of small strapping tension and the like, and smoothness, reliability and safety of strapping conveying are ensured. In one embodiment, the limiting structure comprises a press roller, wherein the roller shaft axis of the press roller is parallel to the roller shaft axis of the steering roller, and the roller surface of the press roller is close to the roller surface of the strapping wrapping area of the roller body of the steering roller. For a turning roll body of a grooved roll, the pressure roll may be located at the notch of the grooved roll.

Further optimizing the above-mentioned looper 3, as in fig. 5, the inlet guide roller set and/or the outlet guide roller set comprises a clamping mechanism 37 for clamping the strapping, which clamping mechanism 37 is arranged on the off-frame deck defined by the corresponding guide roller set. By arranging the clamping mechanism 37, the strapping can be clamped at the inlet side or the outlet side of the looper device 3, the operation of the strapping is limited, and the reliability and the safety of production are ensured; for example, when the looper 3 reaches full, the strap may be clamped at the entrance side of the looper 3, the strap unwinder 11 stops feeding the strap, and when the strap unwinder 11 fails or the bundling device fails, the strap may be clamped at the exit side of the looper 3, the looper 3 stops feeding the strap. When it is desired to recover the strap during the tying process, the gripping means 37 grips the strap on the inlet side of the loop and the strap is returned to the loop by the tension loop roller 33.

Wherein it is preferable that both the inlet guide roller set and the outlet guide roller set include the above-described clamping mechanism 37.

In one embodiment, the clamping mechanism 37 includes a clamping base, a fixed clamping plate fixedly mounted on the clamping base, and a movable clamping plate movably mounted on the clamping base, and the movable clamping plate is configured with a clamping driving structure for driving the movable clamping plate to approach or separate from the fixed clamping plate. The clamping driving structure can adopt linear driving equipment such as an air cylinder, a hydraulic cylinder and the like. It will be appreciated that the movable clamp plate and the fixed clamp plate are arranged opposite to each other, and the plate surfaces of the movable clamp plate and the fixed clamp plate are preferably parallel to the belt surface of the strapping.

Further, the clamping mechanism 37 further includes at least one constraining roller set, the constraining roller set includes two constraining rollers disposed on two sides of the outer tape running channel relatively, an axial direction of the constraining rollers is parallel to an axial direction of the looper roller, a distance between the two constraining rollers is matched with a thickness of the strapping, and the strapping can be well constrained and limited by the two constraining rollers, so that the strapping is ensured to be conveyed according to a set running direction, and running stability of the strapping is improved. Preferably, the restraining roller sets are respectively arranged at the upstream and downstream of the fixed clamping plate.

Further optimizing the above-mentioned looper 3, as in fig. 5, said set of inlet guide rollers and/or said set of outlet guide rollers comprises at least one set of stop means 38; the limiting mechanism 38 comprises a first limiting roller set for restraining and guiding the strap face and a second limiting roller set for restraining and guiding the strap edge, the axis of the first limiting roller is parallel to the axis of the guide roller, and the axis of the second limiting roller is perpendicular to the axis of the guide roller. The first limiting roller sets comprise two first limiting rollers which are oppositely arranged at two sides of the outer tape conveying channel, the distance between the two first limiting roller sets is matched with the thickness of the strapping tape, the strapping tape can be well restrained and limited by the two first limiting roller sets, the strapping tape is ensured to be conveyed according to the set running direction, and the running stability of the strapping tape is improved; the second limiting roller sets comprise two second limiting rollers which are oppositely arranged on two lateral sides of the outer tape moving channel, the distance between the two second limiting roller sets is matched with the width of the strapping, and the strapping can be well restrained and limited by the two second limiting roller sets to move, so that the situation that the strapping is deviated is avoided.

The method of using the above-described looper 3 is generally as follows:

1) When the tensioning looper roller 33 is between the first stroke end (corresponding to the maximum looper amount) and the second stroke end (corresponding to the minimum looper amount), the strap unwinder 11 is activated, replenishing the looper 3 with strap;

2) When the tensioning looper roller 33 approaches the first travel end, the strap uncoiler 11 decelerates to supply the strap, and when the tensioning looper roller reaches the first travel end, the inlet clamping mechanism 37 clamps the strap, and the strap uncoiler 11 automatically stops working;

3) When the tension loop roller 33 approaches the second stroke end, the strap unwinder 11 accelerates the feeding of the strap; in general, the looper 3 has a sufficient amount of looper, the tension looper 33 will float between the first and second travel ends, but in case of a failure of the strap unwinder 11 or the like, the outlet gripping mechanism 37 grips the strap when the tension looper 33 reaches the second travel end, the looper 3 stops feeding the strap and a failure alarm is given.

Example two

Referring to fig. 1-4, an embodiment of the present utility model provides a strap feeding system comprising a strap unwind unit 1 and a strap feeding unit 4 adapted to be connected to a baling head 5 of a baling robot, said strap unwind unit 1 being engaged with said strap feeding unit 4 by a loop device 3 provided in the above-described embodiment one.

In one embodiment, as shown in fig. 1-4, the strap unwinder unit 1 includes a strap welder 2 and two strap unwinders 11, both strap unwinders 11 are engaged with the strap welder 2, and an outlet of the strap welder 2 is engaged with the looper 3.

In one embodiment, the above-mentioned strap uncoiling machine 11 may adopt a strap uncoiling device disclosed in CN201721636632.2, and the specific structure thereof will not be described herein. Of course, other suitable devices for unwinding the strapping tape are also suitable for use in this embodiment.

The two strap uncoilers 11 can both send strap heads to the strap welding machine 2, when the strap coil on one strap uncoiler 11 is to be supplied, the strap coil on the other strap uncoiler 11 is uncoiled, and the strap tail of the currently conveyed strap coil and the strap head of the newly uncoiled strap coil are welded at the strap welding machine 2 to form a continuous strap, so that continuous strap supply can be realized, the production smoothness is ensured, and the bundling efficiency and the production rhythm are improved.

Wherein preferably two strap unwinders 11 and strap welders 2 are arranged in line in sequence.

The looper 3 can store a certain length of strapping, and can better coordinate the production pace between the upstream strapping unreeling and feeding and the downstream bundling operation, thereby improving the smoothness, reliability and safety of the system operation.

Example III

The present embodiment provides a strap feeding unit 4, which can be used in the second embodiment described above.

As shown in fig. 6, the strap feeding unit 4 includes a feeding duct 41 adapted to be connected to the baling head 5, and a follower mechanism for causing the feeding duct 41 to follow the baling head 5. Through the following action of the following mechanism, the position of the conveying guide pipe 41 can be timely adjusted according to the bundling operation and bundling position of the bundling head 5, so that the conveying guide pipe 41 can follow up with the bundling head 5, and the working range and the working quality of the bundling robot are effectively increased.

The lumen of the delivery catheter 41 is used for tape running. The conveying conduit 41 is preferably detachably connected with the bundling head 5 and the following mechanism respectively, so that maintenance operation is facilitated, the conveying conduit 41 can be rapidly detached, and threading and belt breakage processing are facilitated; the detachable connection mode can be a plug connection mode, a clamping mode, a bolt fixing connection mode and the like.

As a preferable solution, the conveying conduit 41 is a flexible conduit, and based on the ductility of the flexible conduit, the positioning error of the following mechanism can be compensated, the reliability of conveying the strapping is improved, and the situations that the conveying conduit 41 and the strapping are broken by pulling and the like can be avoided. For flexible conduits, at least part of the tube section where the delivery conduit 41 may be provided is a metal hose, although rubber tubes or the like are also possible.

In one embodiment, as shown in fig. 6, the following mechanism includes a base, a swing seat 421 and a lifting frame 422, the swing seat 421 is rotatably mounted on the base through a swing shaft with an axis parallel to a vertical direction, a swing driving structure 423 is disposed on the base, a lifting driving structure 424 is disposed on the swing seat 421, and the lifting frame 422 is connected with the lifting driving structure 424. The swing driving structure 423 may be a conventional swing driving device, for example, a cylinder is used for driving, a cylinder body of the cylinder is hinged on the base, and an output shaft of the cylinder is hinged with the swing seat 421. For lifting of the lifting frame 422, preferably, as shown in fig. 6, the bottom end of the lifting frame 422 is hinged to the swinging seat 421, and the lifting driving structure 424 is used for driving the lifting frame 422 to swing up and down, so as to drive the conveying conduit 41 to lift, in this manner, the lifting driving structure 424 may be driven by a conventional swinging driving device, for example, a cylinder body of which is hinged to the swinging seat 421, and an output shaft of which is hinged to the lifting frame 422.

Further, a locking structure can be provided, which can be locked after the lifting frame 422 moves in place, and released when the lifting frame 422 needs to move; the locking structure may be implemented by driving the locking pin to be inserted into or withdrawn from a pin hole of the lifter 422, and the driving device may be a linear driving device such as an air cylinder/hydraulic cylinder.

Further, the lifting frame 422 is provided with a belt feeding channel which is communicated with the conveying conduit 41, and the belt feeding channel can be a tubular channel or the like arranged on the lifting frame 422; the two ends of the tubular channel are preferably arc-shaped pipes, so that the threading and the belt conveying are facilitated.

Therefore, the strapping conveying unit 4 provided in this embodiment can store a certain length of strapping on the basis of reliably conveying the strapping, and can coordinate production steps of upstream and downstream processes.

Example IV

The present embodiment is used for optimizing the strap feeding system provided in the second embodiment. Preferably, the belt uncoiler 11 adopts a driving motor capable of rotating positively and negatively as a power source, based on the design, the belt feeding can be realized by the forward rotation of the driving motor, the recovery of the belt can be realized by the reverse rotation of the driving motor, the operation is convenient and reliable, and the waste of the belt and the interference and the potential safety hazard to the site can be avoided; in particular, based on the looper 3 and the strap feeding unit 4 described above, the recovered strap is not re-reeled, but is stored only by the strap feeding unit 4 and/or the looper 3, avoiding repeated threading.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A looper device, characterized in that: the automatic feeding device comprises a loop frame and at least two groups of loop rollers, wherein each loop roller is arranged on the loop frame and defines a belt conveying channel in the frame, each loop roller comprises a loop roller shaft and a plurality of loop rollers suitable for conveying belts, and each loop roller is arranged on the corresponding loop roller shaft in a penetrating mode.

2. The looper of claim 1, wherein: each loop roller comprises a fixed loop roller fixedly arranged above the loop frame and a tensioning loop roller arranged on a loop frame guide rod, wherein the tensioning loop roller is provided with a tensioning power source.

3. The looper of claim 2, wherein: the loop frame is a vertical loop frame, the tensioning loop roller is arranged below the fixed loop roller, the tensioning power source is a counterweight or a driving power source, and the tension of the strapping tape can be adjusted.

4. The looper of claim 1, wherein: the automatic feeding device is characterized by further comprising an inlet guide roller set and an outlet guide roller set which are arranged on two sides of the loop frame, wherein the inlet guide roller set and the outlet guide roller set are respectively limited to form an outer frame travelling channel, and the two outer frame travelling channels are respectively connected with a tape inlet and a tape outlet of the inner frame travelling channel.

5. The looper of claim 4, wherein: the inlet guide roller set and/or the outlet guide roller set comprises a clamping mechanism for clamping the strapping, which clamping mechanism is arranged on an off-frame deck defined by the corresponding guide roller set.

6. The looper of claim 5, wherein: the clamping mechanism comprises a clamping seat, a fixed clamping plate fixedly arranged on the clamping seat and a movable clamping plate movably arranged on the clamping seat, and the movable clamping plate is provided with a clamping driving structure for driving the movable clamping plate to be close to or far away from the fixed clamping plate.

7. The looper of claim 4, wherein: the inlet guide roller set and/or the outlet guide roller set comprises at least one set of limiting mechanisms; the limiting mechanism comprises a first limiting roller set for carrying out constraint guidance on the strapping surface and a second limiting roller set for carrying out constraint guidance on the strapping edge, the axis of the first limiting roller is parallel to the axis of the guide roller, and the axis of the second limiting roller is perpendicular to the axis of the guide roller.

8. The looper of claim 4, wherein: the outlet guide roller set comprises a plurality of outlet steering rollers, an outlet side frame outer tape passage is defined by the plurality of outlet steering rollers, and the outlet side frame outer tape passage is connected with an outlet of the frame inner tape passage.

9. The looper of claim 8, wherein: among the outlet turning rolls, part is a fixed turning roll and the other part is a swinging turning roll; the swing steering roller comprises a swing roller body and a swing roller frame, wherein the swing roller body is rotatably arranged on the swing roller frame, the swing roller frame is rotatably arranged on a corresponding installation foundation through a swing shaft, and the axis of the swing shaft is perpendicular to the axis of the swing roller body.

10. A strapping feed system comprising a strapping unwinder unit and a strapping feed unit adapted to be connected with a strapping head of a strapping robot, characterized in that: the strap unwinder unit is engaged with the strap feeding unit by a looper as defined in any one of claims 1 to 9.