CN116692105A - Machine head for strapping machine and strapping machine - Google Patents

Abstract

The invention provides a machine head for a binding machine and the binding machine. The machine head for the bundling machine comprises: a mounting module comprising a mounting base; the belt conveying module is provided with a belt conveying channel; the welding module comprises a welding shell, a main shaft, a clamping mechanism, a welding mechanism and a first driving part; the welding casing comprises a casing body and an access cover plate, wherein a mounting groove is formed in one surface of the casing body, the mounting groove is formed in the surface of the casing body, the access cover plate is arranged on the casing body and is configured to cover the access opening, the access cover plate comprises a first access plate, and the upper end portion of the first access plate is rotatably arranged on the casing body. The machine head maintenance device is convenient for operators to maintain the machine head, so that the maintenance convenience is improved, and the maintenance difficulty is reduced.

Description

Machine head for strapping machine and strapping machine

Technical Field

The invention relates to the technical field of strapping machines, in particular to a machine head for a strapping machine and the strapping machine.

Background

At present, with the continuous development of the logistics industry, before goods are transported, packing treatment is usually required to be carried out through packing belts. With the popularization of the automatic packaging technology, strapping machines having an automatic packaging function are widely used. For example: chinese patent publication No. CN 111392093A discloses a head for a baler and a baler, the head comprises a mounting base, a sealing assembly, a belt feeding assembly and a driving assembly, wherein the sealing assembly and the belt feeding assembly need to be overhauled and maintained regularly as required in the use process, and especially, a movable welding block in the sealing assembly needs to be maintained and replaced regularly. For this reason, in the maintenance operation, it is necessary to open the housing on the mounting base, and then to detach the seal assembly and the tape carrier assembly from the mounting base in order, and then to separate the seal assembly and the tape carrier assembly for maintenance and replacement of the parts. During maintenance, the seal assembly and the tape carrier assembly need to be completely disassembled to repair and replace the parts, which results in greater maintenance difficulty and lower maintenance efficiency. Therefore, how to design a technology which is convenient to maintain and improves maintenance convenience is a technical problem to be solved by the invention.

Disclosure of Invention

The invention provides a machine head for a binding machine and the binding machine, which are convenient for operators to maintain the machine head, so as to improve the convenience of maintenance and reduce the difficulty of maintenance.

The invention provides a machine head for a binding machine, comprising:

a mounting module comprising a mounting base;

the belt conveying module is provided with a belt conveying channel;

the welding module comprises a welding shell, a main shaft, a clamping mechanism, a welding mechanism and a first driving part; the welding machine shell comprises a shell body and an overhaul cover plate, wherein a mounting groove is formed in one surface of the shell body, an overhaul hole is formed in the surface of the shell body through the mounting groove, the overhaul cover plate is arranged on the shell body and is configured to cover the overhaul hole, the overhaul cover plate comprises a first overhaul plate, and the upper end part of the first overhaul plate is rotatably arranged on the shell body; the main shaft is transversely arranged and rotatably arranged on the shell, and a first cam and a second cam are arranged on the main shaft; the welding mechanism comprises a movable welding block and a static welding block which are arranged oppositely, and the clamping mechanism comprises a sliding clamping block and a fixed clamping block which are arranged oppositely; the clamping mechanism and the welding mechanism are arranged on the welding shell, the first cam, the second cam, the sliding clamping block and the movable welding block are arranged in the mounting groove and positioned in an overhaul area formed by the overhaul opening, and the first overhaul plate is configured to at least cover the outer sides of the sliding clamping block and the movable welding block in a closed state; the first driving part is configured to drive the main shaft to rotate, the first cam is configured to drive the movable welding block to be close to the static welding block, and the second cam is configured to drive the sliding clamping block to be close to the fixed clamping block;

The welding module and the belt feeding module are arranged on the mounting base, and the welding module and the belt feeding module can move relatively.

The invention also provides a strapping machine comprising a packaging chute and a machine head for the strapping machine, wherein the machine head for the strapping machine is configured to form a conveying channel for conveying strapping tapes in cooperation with the packaging chute.

According to the machine head for the binding machine and the binding machine, the overhaul cover plate which can be turned and opened is arranged on the welding machine shell of the welding module, and in the later use process, when maintenance operation is needed, the positions of parts needing to be maintained, such as the movable welding block, the sliding clamping block and the like, can be exposed only by opening the overhaul cover plate, so that an operator can conveniently and well maintain the movable welding block, and after the overhaul cover plate is opened, the operator can conveniently clean and maintain the cams on the rotating shaft and scraps in the mounting groove, so that the welding module is not required to be disassembled, the maintenance difficulty is effectively reduced, and the maintenance convenience is improved.

Drawings

FIG. 1 is a schematic view of a strapping head of the present invention;

FIG. 2 is a second schematic view of the strapping head of the present invention;

FIG. 3 is an exploded view of the strapping head of FIG. 1;

FIG. 4 is a schematic view of the welding module of FIG. 1;

FIG. 5 is one of the cross-sectional views of the welding module of FIG. 1;

FIG. 6 is a second cross-sectional view of the welding module of FIG. 1;

FIG. 7 is a third cross-sectional view of the welding module of FIG. 1;

FIG. 8 is a schematic view of the weld module of FIG. 4 with an access panel removed;

FIG. 9 is a fourth cross-sectional view of the welding module of FIG. 4;

FIG. 10 is an enlarged partial schematic view of area A of FIG. 9;

FIG. 11 is a partially enlarged schematic illustration of region B of FIG. 9;

FIG. 12 is an enlarged partial schematic view of region C of FIG. 9;

FIG. 13 is a schematic view of the welding module of FIG. 4 in a maintenance state;

FIG. 14 is one of the schematic structural views of the mounting module of FIG. 1;

FIG. 15 is a second schematic diagram of the mounting module of FIG. 1;

FIG. 16 is a schematic view of the belt module of FIG. 1;

FIG. 17 is a second schematic diagram of the belt module of FIG. 1;

FIG. 18 is a schematic view of the belt module of FIG. 16 in an inspection position;

FIG. 19 is a schematic view of the belt module of FIG. 16 with the front panel removed;

fig. 20 is an assembly view of the second detection switch, the second pressing plate and the mounting block of fig. 16.

Reference numerals:

installing a module 1;

The device comprises a mounting base 11, a sliding seat 12, a first driving part 13, a ball screw 14, an air passage control valve 15, a guide sliding rail 16 and a travel switch 17;

the plug-in part 121, the fixing hole 122, the first connecting plate 123 and the second connecting plate 124;

a tape feed module 2;

the device comprises a support frame 20, a belt feeding machine shell 21, a belt feeding wheel 22, a second driving part 23, a wheel frame 24, a pressing wheel 25, a pressing spring 26, a third driving part 27, an auxiliary belt groove 28 and a detection mechanism 29;

the front panel 211, the rear back plate 212, the belt feeding member 213, the hinge 214, the elastic claw 215, the second air tap 216, the first air cylinder 271, the swing arm 272, the second air cylinder 291, the first detection switch 292, the first pressing plate 293, the first flanging structure 294, the second detection switch 295, the second pressing plate 296, the mounting block 297 and the second flanging 298;

a feed groove 2130, a first notch 2131, a second notch 2132, a first outer guide bar 2133, a second outer guide bar 2134, a first inner guide bar 2135, a second inner guide bar 2136;

a welding module 3;

a welding shell 31, a main shaft 32, a clamping mechanism 33, a welding mechanism 34 and a first driving part 35;

the housing 311, the access cover plate 312, the plug-in fitting portion 313, the first cam 321, the second cam 322, the third cam 323, the fourth cam 324, the sliding clamping block 331, the fixed clamping block 332, the movable welding block 341, the static welding block 342, and the driving member two 343;

The mounting groove 3111, the guide block 3112, the guide-belt channel 3113, the mounting bracket 3114, the mounting shield 3115, the first air nozzle 3116, the first access panel 3121, the through-hole 3120, the mounting support panel 3122, the rotating panel 3123, the spacer 3124, the limit stop 3125, the second access panel 3126, the lower clamping mechanism 3301, the upper clamping mechanism 3302, the threading aperture 3311;

tape inlet 3101, tape inlet notch 3102, and tape outlet notch 3103.

Description of the embodiments

The present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a strapping machine including a strapping head, a wrapping chute, and other accessory components in conventional strapping machines. The packing machine comprises a bundling machine head, a packing chute, a packing belt, a packing machine head and a packing machine, wherein the packing belt enters the bundling machine head and is conveyed into the packing chute so that the packing belt surrounds a cargo for one circle, and then the packing belt is tensioned, welded, cut off and the like through the bundling machine head so as to achieve the packing treatment of the cargo. Reference is made herein to the configuration of a packing chute and other accessory components in a conventional strapping machine, and no limitations and details are set forth herein.

For strapping heads, as shown in fig. 1, it generally comprises a mounting module 1, a strap feeding module 2 and a welding module 3. Wherein the mounting module 1 is used as a carrier for mounting the tape feed module 2 and the welding module 3, and the strapping head is fitted to the strapping machine by means of the mounting module 1. The belt feeding module 2 is used for driving the packing belt to convey forward, and after the packing belt is driven by the belt feeding module 2 to pass through the welding module 3 and wind the goods for a circle, the end part of the packing belt is guided by the belt feeding module 2 and returns to the welding module 3. The welding module 3 welds and cuts the overlapping area formed by the strapping tape in the strapping tape so that the strapping tape is connected end to form a loop structure and is strapped on the surface of the goods.

The specific manner in which the strapping band is fed via the band feeding module 2 and the welding is severed via the welding module 3 may be referred to in the conventional art, and is not limited and described in detail herein.

The improved design of the three modules of the installation module 1, the tape feed module 2 and the welding module 3 in the strapping head is described with reference to the accompanying drawings.

In the first embodiment, for the welding module 3, since the welding module 3 needs to weld the strapping tape during long-term use, the moving parts configured by the welding module 3 and the scraps generated by the strapping tape during the welding process need to be maintained and cleaned regularly.

In order to facilitate the operator's quick maintenance and cleaning of the welding module 3 without excessive disassembly of the welding module 3, the following structural design is performed for the welding module 3.

As shown in fig. 4 to 12, the welding module 3 includes a welding housing 31, a main shaft 32, a clamping mechanism 33, a welding mechanism 34, and a first driving member 35; the welding housing 31 includes a housing 311 and an access cover plate 312, one surface of the housing 311 is provided with a mounting groove 3111, the mounting groove 3111 forms an access opening (not labeled) on the surface of the housing 311, the access cover plate 312 is provided on the housing and configured to cover the access opening, the access cover plate 312 includes a first access plate 3121, and an upper end portion of the first access plate 3121 is rotatably provided on the housing; the main shaft 32 is laterally arranged and rotatably provided on the housing 311, and the main shaft 32 is provided with a first cam 321 and a second cam 322, the first cam 321 and the second cam 322 being located in the mounting groove 3111; the welding mechanism 34 comprises a movable welding block 341 and a static welding block 342 which are oppositely arranged, and the clamping mechanism 33 comprises a sliding clamping block 331 and a fixed clamping block 332 which are oppositely arranged; the clamping mechanism 33, the welding mechanism 34 are provided on the welding housing 31, and the access cover plate 312 is configured to cover the outer sides of the first cam 321, the second cam 322, and the movable welding block 341 in a closed state; the first driving part 13 is configured to drive the spindle 32 to rotate, the first cam 321 is configured to drive the movable welding block 341 to approach the static welding block 342, and the second cam 322 is configured to drive the sliding clamping block 331 to approach the fixed clamping block 332;

The first cam, the second cam, the sliding clamping block and the movable welding block are all arranged in the mounting groove and located in an overhaul area formed by the overhaul hole.

Specifically, during use, the clamping mechanism 33 is used for compressing the strapping tape when the strapping tape is tensioned and welded and cut, and when the strapping tape needs to be compressed, the main shaft 32 rotates to enable the second cam 322 to press the sliding clamping block 331 to be close to the fixed clamping block 332, so that the strapping tape is clamped between the sliding clamping block 331 and the fixed clamping block 332. The welding mechanism 34 is used for carrying out welding treatment on the overlapped part of the packing belt between the movable welding block 341 and the static welding block 342, and before welding, the movable welding block 341 is moved close to the static welding block 342 by rotating the rotating shaft, so that the overlapped part of the packing belt is clamped between the movable welding block 341 and the static welding block 342.

During long use, the movable welding block 341 needs to be periodically maintained and replaced due to welding loss, and similarly, scraps generated from the strapping tape during the transportation of the strapping tape and welding of the strapping tape are also stored in the mounting groove 3111.

When it is desired to perform maintenance of the movable welding block 341 and cleaning of debris in the mounting groove 3111, the access cover 312 may be turned over to open the access opening to expose the movable welding block 341 in the mounting groove 3111, so that the movable welding block 341 may be maintained and replaced individually without excessive disassembly of the welding module 3. Meanwhile, after the access cover plate 312 is opened, since the bottom area of the access opening is exposed to the outside, an operator can clean up the chips in the installation groove 3111, thereby achieving the effect of reducing the disassembly parts and even achieving the disassembly-free maintenance.

In addition, during use, when lubrication is desired for moving parts in the mounting groove 3111, the access panel 312 may be flipped open to facilitate lubrication of the cam, spindle 32, etc. by an operator.

Because the first cam, the second cam, the sliding clamping block and the movable welding block are all arranged in the mounting groove and are positioned in the overhaul area formed by the overhaul port, all moving parts in the mounting groove can be overhauled and maintained in the overhaul area formed by the overhaul port only by detaching the overhaul cover plate on the welding shell.

In some embodiments, to avoid the occurrence of an optional opening of access panel 312 due to external forces during the taping process, welding module 3 further includes a return spring configured to apply a spring force to access panel 312 to flip closed.

Specifically, when the access cover 312 is not subjected to external force, under the action of the return spring, the access cover 312 is in a normally closed state, i.e. the access cover 312 covers the whole access opening.

During normal tape feeding, access panel 312 is in a closed state under the action of the return spring, at which time access panel 312 covers the access opening. On the one hand, the smooth reliability of the belt feeding is ensured, and on the other hand, the safe and reliable use is ensured.

Through being provided with the access cover that can overturn and open on welding module's welding casing, in later stage use, when needing maintenance operation, only need open the access cover alright exposing the position that moves the welding piece to make things convenient for operating personnel better to maintain and move the welding piece, and after opening the access cover, still make things convenient for operating personnel to clean the maintenance to the epaxial cam of pivot and the piece in the mounting groove, and then need not to tear welding module open and untie, effectually reduced the degree of difficulty of maintaining, in order to improve the maintenance convenience.

Further, as for the clamping mechanism 33, it includes at least two lower clamping mechanisms 3301 arranged at the lower portion of the housing 311, each lower clamping mechanism 3301 including a slide clamping block 331 and a fixed clamping block 332 arranged opposite to each other up and down; the lower clamping mechanism 3301 is positioned below the main shaft 32, and the welding mechanism 34 is positioned between the two lower clamping mechanisms 3301; the first access panel 3121 is also configured to cover the exterior of the sliding clamping block 331 of the lower clamping mechanism 3301 in a closed condition.

In particular, for the lower two lower clamping mechanisms 3301, they are used to clamp the strapping bands during the welding process to ensure that overlapping portions of the strapping bands can be welded together by the welding mechanism 34. The two lower clamping mechanisms 3301 are distributed on two sides of the welding mechanism 34, and after the access cover plate 312 is opened, the two lower clamping mechanisms 3301 can be exposed at the same time, so that an operator can conveniently maintain the sliding clamping blocks 331 of the two lower clamping mechanisms 3301.

In one embodiment, the following design is made for the mounting positional relationship of the slide clamp block 331 and the fixed clamp block 332 in the lower clamp mechanism 3301, and the mounting positional relationship of the movable weld block 341 and the stationary weld block 342 in the welding mechanism 34.

The sliding clamping blocks 331 and the movable welding blocks 341 are both arranged in the mounting groove 3111, the sliding clamping blocks 331 of the lower clamping mechanism 3301 are positioned above the corresponding fixed clamping blocks 332, and the movable welding blocks 341 are positioned above the static welding blocks 342; the fixed clamping block 332 and the static welding block 342 of the lower clamping mechanism 3301 are arranged at the lower end part of the first access plate 3121; the main shaft 32 is provided with a third cam 323, and the third cam 323 is configured to drive the first access plate 3121 to rotate.

Specifically, the sliding clamping block 331 and the movable welding block 341 are disposed in the mounting groove 3111 and slide in the mounting groove 3111 to approach the fixed clamping block 332 and the static welding block 342 by corresponding cam driving. It is known that, with reference to the conventional technical scheme, the sliding clamping block 331 and the movable welding block 341 can be reset by means of a spring without being pressed by a protrusion. That is, the slide clamp block 331 and the fixed clamp block 332 are separated from each other without being pushed by the cam, and the movable weld block 341 and the static weld block 342 are separated from each other as well.

Wherein, since the fixed clamping block 332 and the static welding block 342 are disposed at the lower end portion of the first access plate 3121, after the strapping tape is wound around the cargo for one turn and the welding operation is completed, the main shaft 32 is rotated to push the first access plate 3121 apart against the elastic force of the return spring by the third cam 323, thereby allowing the strapping tape to be slid off from the surfaces of the fixed clamping block 332 and the static welding block 342.

That is, the first access plate 3121 of the present application serves to cover the moving parts such as the movable welding block 341 and the like for the convenience of the later-stage repair, and also serves to install the fixed clamping block 332 and the static welding block 342 to meet the requirement of the installation of the parts, during the use. And, in cooperation with the driving of the third cam 323, it is possible to release the strapping tape strapped on the outer surface of the goods after the welding operation is completed. The first access panel 3121 is functionally diverse such that the overall structure is more compact, more conducive to shrinking the overall volume.

Further, one side of the bottom of the housing 311 is provided with a tape inlet hole 3101 and a tape inlet notch 3102 which are arranged up and down, and the other side of the bottom of the housing 311 is provided with a tape outlet notch 3103; the lower end of the first access plate 3121 is provided with a mounting support plate 3122, and the fixed clamping block 332 and the static welding block 342 of the lower clamping mechanism 3301 are detachably provided on the mounting support plate 3122; the lower part of the first access plate 3121 is further provided with a through hole 3120, the welding module 3 further comprises a rotating plate 3123, the upper end part of the rotating plate 3123 is rotatably provided on the housing, and the lower end part of the rotating plate 3123 is provided with a spacer 3124; a fourth cam 324 is provided on the main shaft 32, the fourth cam 324 being configured to drive the rotation of the first rotating plate access plate; wherein, in a state where both the first access plate 3121 and the rotating plate 3123 are closed, the installation support plate 3122 covers the lower portions of the in-take notch 3102 and the out-take notch 3103, the spacer 3124 is inserted in the through hole 3120 and between the movable welding block 341 and the static welding block 342, and the spacer 3124 is configured to guide the strapping tape entered from the in-take hole 3101 to be conveyed from the upper surface of the spacer 3124 to the out-take notch 3103.

Specifically, the welding housing 31 has a tape feed hole 3101 and a tape feed notch 3102 on the side close to the tape feed module 2, and the welding housing 31 has a tape feed notch 3103 on the side far from the tape feed module 2. The strapping strand fed from the strap feeding module 2 enters the welding housing 31 via the strap feeding hole 3101 and is fed out via the strap discharge gap 3103 into the packaging chute in the strapping machine for one round around the load, and finally is guided via the strap feeding module 2 such that the strapping strand enters the welding housing 31 again via the strap feeding gap 3102 and forms an overlapping region of the strapping strand at the movable welding block 341, the static welding block 342.

As shown in fig. 9 to 12, during the tape feeding, the rotating plate 3123 is in a closed state such that the spacer 3124 is located between the movable welding block 341 and the static welding block 342, thereby forming upper and lower passages at intervals between the movable welding block 341 and the static welding block 342. The packing belt is fed from the feeding hole 3101 and fed from the upper surface of the spacer 3124 to the discharge gap 3103, and after the packing belt surrounds the article for one round, the packing belt enters and is fed to the lower side of the spacer 3124 through the feeding gap 3102, and the packing belt forms an overlapping portion at the upper and lower portions of the spacer 3124.

After the tape feeding operation of the strapping tape is completed and before welding, the spindle 32 is rotated to push the rotating plate 3123 to rotate outwards by the fourth cam 324, so that the spacer 3124 is separated from the space between the welding block 341 and the static welding block 342, and thus, the strapping tapes overlapped together can be pressed and welded together by the welding mechanism.

To facilitate smooth transport of the strapping tape within the weld enclosure 31, reference is made to the orientation of the lower clamping mechanism 3301 in the drawing of fig. 9. The sliding clamping blocks 331 located on the left side of fig. 9 adjacent to the tape inlet holes 3101 are provided with tape through holes 3311, and the spacer 3124 is obliquely arranged between the two sliding clamping blocks 331, with the upper end of the spacer 3124 adjacent to the lower edge of the tape through holes 3311.

Specifically, in the strapping tape threading process, the strapping tape fed in from the tape feed hole 3101 is fed out from the tape feed notch 3103 through the left side slide clamp block 331 via the tape feed hole 3311 and guided through the space between the slide clamp block 331 and the fixed clamp block 332 in the right side lower clamp mechanism 3301 via the surface of the spacer 3124. The strapping band surrounds the load one revolution and again enters the space between the slide clamping block 331 and the fixed clamping block 332 in the lower clamping mechanism 3301 on the left via the band entry gap 3102, and finally the free end of the strapping band is fed to the region between the spacer 3124 and the static welding block 342 to complete the band feeding.

In order to position the free end of the strapping band, a limit stop 3125 is also provided below the lower end of the spacer 3124, the limit stop 3125 being provided on the mounting pallet 3122 between the static weld block 342 and the corresponding side of the fixed clamp block 332.

Specifically, the limit stop 3125 is disposed on the same side of the spacer 3124 as the static welding block 342, and thus the free end portion of the strapping band that enters between the spacer 3124 and the static welding block 342 can be limited by the side surface of the limit stop 3125.

In addition, in order to smoothly guide the strapping tape to be conveyed from the upper surface of the spacer 3124 to the tape exit notch 3103, a guide block 3112 is further provided above the limit stop 3125, the guide block 3112 is provided between the mounting groove 3111 and the slide clamping block 331 at the corresponding side, and a bottom surface of the guide block 3112 forms a guide surface (not labeled) configured to extend obliquely downward in the conveying direction of the strapping tape.

Specifically, a guide channel is formed between the guide block 3112 and the limit stop 3125 such that the strapping tape is fed from the upper surface of the spacer 3124, guided through the guide surface of the guide block 3112 and the upper surface of the limit stop 3125, into the right lower clamping mechanism 3301 and finally out of the strapping exit notch 3103.

Still further, for effective tightening of the strapping tape, the top of the welding housing 31 is provided with a guide channel 3113 configured to guide the strapping tape into the tape feed module 2; the clamping mechanism 33 further comprises an upper clamping mechanism 3302, the upper clamping mechanism 3302 is located above the spindle 32, the upper clamping mechanism 3302 comprises a fixed clamping block 332 and a sliding clamping block 331 which are arranged in an up-down opposite manner, and the upper clamping mechanism 3302 is configured to clamp the strapping tape passing through the tape guide channel 3113;

The access panel 312 further includes a second access panel 3126, the second access panel 3126 being removably disposed on the housing 311 above the first access panel 3121, the second access panel 3126 being configured to cover an exterior of the sliding clamping block 331 of the upper clamping mechanism 3302.

Specifically, to facilitate servicing of the top configured upper clamping mechanism 3302, the access panel 312 further includes a second access panel 3126, and the second access panel 3126 may be removably mounted to the housing 311 and over the access opening using screws or the like.

The state of the welding module 3 during the strap feeding, tightening and welding process will be described with reference to fig. 5 to 7.

As shown in fig. 5, during the process of conveying the strapping tape, the first access plate 3121 and the rotating plate 3123 are both in a closed state, at this time, the spacer 3124 is spaced between the movable welding block 341 and the static welding block 342, the strapping tape is input from the tape inlet hole 3101, sequentially passes through the tape passing hole 3311, the clamping space formed by the upper surface of the spacer 3124 and the lower clamping mechanism 3301 on the right side, and is output from the tape outlet notch 3103 to the external packaging chute; the packing belt fed from the packing chute is guided by the belt feeding module 2 around the load to enter from the belt feeding notch 3102 and is fed to the lower side of the spacer 3124 via the clamping space formed by the lower clamping mechanism 3301 on the left side and is stopped by the limit stopper 3125.

As shown in fig. 6, before tightening the strapping band, the spindle 32 rotates through the fourth cam 324 to turn the rotating plate 3123 outwardly to disengage the spacer 3124 from between the driven and static weld blocks 341 and 342. Simultaneously, the upper clamping mechanism 3302 and the left lower clamping mechanism 3301 clamp the packing belt, so that the packing belt can be tensioned. In the process of tightening the strapping tape, the tape feed module 2 and the welding module 3 are separated from each other so that the strapping tape is tightened against the surface of the goods. After tightening the strapping tape, a welding operation may be performed, with the overlapping portions of the strapping tape being welded together by the cooperation of the dynamic and static weld blocks 341, 342.

As shown in fig. 7, after the welding is completed, the strapping tape needs to be separated from the welding module 3, at this time, the spindle 32 rotates to drive the first access plate 3121 to turn outwards through the third cam 323, so that the strapping tape slides off the surfaces of the fixed clamping block 332 and the static welding block 342 mounted on the mounting support plate 3122, and further separation of the strapping tape from the welding module 3 is achieved.

In some embodiments, a heat weld or friction weld may be employed for the performance entity of the welding mechanism 34.

In the heat welding method, an electric heating member (not shown) is provided to the movable welding block 341, and the electric heating member heats and welds the overlapping portion of the strapping bands.

In the friction welding mode, a plurality of friction protrusions (not labeled) are respectively arranged on opposite surfaces of the movable welding block 341 and the static welding block 342, and the welding module 3 further comprises a second driving part 343, wherein the second driving part 343 is configured to drive the movable welding block 341 to reciprocate relative to the static welding block 342.

Further, in order to achieve the demand for a compact design, the first driving member 35 and the second driving member 343 disposed on the welding module 3 may be mounted on the back of the housing 311. For this, the back of the housing 311 is provided with a mounting bracket 3114, and the first driving member 35 and the second driving member 343 are provided on the mounting bracket 3114.

Specifically, the first driving member 35 and the second driving member 343 are mounted and fixed by the mounting bracket 3114 at the back of the housing 311, and the housing 311 is further fixedly mounted on the mounting module 1 by the mounting bracket 3114, so that the first driving member 35 and the second driving member 343 are mounted by fully utilizing the space in the front-rear thickness direction, and the space occupation in the left-right length direction is reduced.

As shown in fig. 13, in order to ensure that the movable members of the clamping mechanism 33 and the welding mechanism 34 can slide reliably in the mounting groove 3111, mounting shields 3115 may be provided on the upper and lower sides of the main shaft 32, respectively, and the mounting shields 3115 may be shielded outside the sliding clamping block 331 and the movable welding block 341. In this way, when the operator opens the access panel 312 and then removes the mounting shield 3115 at the corresponding position, the sliding clamp block 331 and the movable welding block 341 can be replaced and repaired.

In a preferred embodiment, to reduce the frequency of cleaning debris in the mounting groove 3111, the top of the mounting groove 3111 is also provided with a first air nozzle 3116, the first air nozzle 3116 being configured to blow air downwards.

Specifically, since the first access plate 3121 and the rotating plate 3123 are intermittently opened to access the port during use. At this time, the first air nozzle 3116 is ventilated and blown downward to blow out the chips from the mounting groove 3111 in time by the blowing of the first air nozzle 3116 when the first access plate 3121 and the rotating plate 3123 are opened. In this way, on the one hand, the frequency with which the operator cleans debris inside the mounting groove 3111 can be reduced, and on the other hand, the wear caused by the debris to moving parts in the mounting groove 3111 can be reduced, thereby reducing the frequency of maintenance and replacement.

In the second embodiment, as shown in fig. 14 to 15, the mounting module 1 includes a mounting base 11, a slide mount 12, and a first driving member 13, the slide mount 12 being slidably provided on the mounting base 11, the driving member being configured to drive the slide mount 12 to slide reciprocally on the mounting base 11; the tape feed module 2 is detachably provided on the mounting base 11, and the welding module 3 is detachably provided on the slide base 12.

Specifically, a modular design is adopted for the mounting module 1, the tape feed module 2, and the welding module 3. The belt feeding module 2 is detachably mounted on the mounting base 11, and the welding module 3 is detachably mounted on the sliding seat 12.

The first driving component 13 is integrally installed on the installation base 11, and the sliding seat 12 is driven to slide on the installation base 11 by using the first driving component 13 so as to meet the requirement of relative sliding between the belt conveying module 2 and the welding module 3.

Furthermore, in order to meet the requirement of convenient disassembly and assembly, the following structural design can be adopted for the assembly mode of the welding module 3 and the installation module 1 so as to reduce the usage amount of bolts.

One side of the sliding seat 12 is provided with a plug-in part 121, and the other side of the sliding seat 12 is provided with a fixing hole 122; one side of the welding housing 31 is provided with a plug-in fitting portion 313, and the other side of the welding housing 31 is provided with a mounting hole (not shown); wherein, the plug-in portion 121 is plugged with the plug-in mating portion 313, and the bolt passes through the mounting hole and is connected with the fixing hole 122.

Specifically, during the assembly process, the welding shell 31 needs to be mounted and fixed on the sliding seat 12, one side of the welding shell 31 is in plug connection with the plug connection portion 121 through the plug connection mating portion 313, and the other side is inserted into the mounting hole and the fixing hole 122 through a bolt to complete the fixed connection. In this way, only the bolt fixing is required on one side of the welding housing 31 during assembly, so that the amount of bolts can be effectively reduced.

In addition, during the disassembly process, only the bolts in the mounting holes are required to be disassembled, and the welding shell 31 is obliquely pulled out, so that the plugging part 121 and the plugging matching part 313 can be separated from each other.

Among them, for the concrete way of fixing the welding housing 31 to the slide base 12 by bolts: in one mode, the fixing hole 122 is a threaded hole, and the bolt is in threaded connection with the threaded hole; in the second mode, the bolt passes through the fixing hole 122 and is connected with a nut in a threaded manner.

Further, for the first driving part 13, a conventional driving device such as a motor or a cylinder may be used as a specific entity.

Specifically, when the first driving part 13 employs a motor, as shown in fig. 14, a rotation shaft of the motor is connected to the slide base 12 through the ball screw 14. During use, the motor rotates in the forward and reverse directions to drive the screw in the ball screw 14 to rotate in the forward and reverse directions so as to drive the sliding seat 12 to reciprocate.

When the first driving part 13 adopts a driving cylinder, as shown in fig. 15, a piston rod of the driving cylinder is connected to the slide base 12. In the use process, the driving cylinder is controlled to stretch out and draw back, so that the sliding seat 12 can be conveniently and quickly controlled to slide back and forth. Wherein, in order to control the action of the driving cylinder conveniently, an air passage control valve 15 is also arranged on the mounting base 11, and the air passage control valve is connected with the driving cylinder through an air pipe.

Further, in order to ensure smooth sliding of the sliding seat 12, a guide rail 16 is further provided on the mounting base 11, the sliding seat 12 is slidably provided on the guide rail 16, and travel switches 17 are respectively provided at both ends of the guide rail 16.

Specifically, the mounting base 11 is provided with a guide rail 16 for mounting the slide base 12, so as to ensure smooth sliding of the slide base 12 on the mounting base 11. And by configuring the travel switch 17, the travel range of the slide mount 12 can be precisely controlled. In particular, the first driving part 13 is a motor, which is controlled to be turned on or off by the travel switch 17.

Still further, a first connecting plate 123 is disposed on a side of the sliding seat 12 close to the first driving component 13, and a plugging portion 121 is disposed on the first connecting plate 123; the sliding seat 12 is provided with a second connecting plate 124 on a side far away from the first driving part 13, the second connecting plate 124 is arranged opposite to the first connecting plate 123, and a fixing hole 122 is formed in the second connecting plate 124.

Specifically, by providing the first connection plate 123 and the second connection plate 124 on the surface of the sliding seat 12, the first connection plate 123 is perforated to form the plugging portion 121, and correspondingly, the welding housing 31 is provided with a protrusion structure to form the plugging mating portion 313, and the protrusion structure can be inserted into the perforation on the first connection plate 123.

Still further, the belt module 2 is directly mounted and fixed on the mounting base 11, so as to make the overall structure more compact. A supporting frame 20 may be provided at the back of the belt module 2, the supporting frame 20 being detachably provided on the base.

Specifically, the back of the belt feeding module 2 is provided with a supporting frame 20 to be mounted on the mounting substrate, and the supporting frame 20 enables the belt feeding module 2 to span over the first driving part 13, so as to meet the requirement of compact design of the whole structure. Wherein the support frame 20 forms an avoidance space in which the first driving part 13 is located.

In the third embodiment, as shown in fig. 16 to 20, the tape feed module 2 includes a tape feed housing 21, a tape feed roller 22, and a second driving member 23; the tape feed housing 21 includes a front panel 211, a rear back plate 212, and a tape feed member 213, wherein a hinge 214 is provided on one side of the rear back plate 212, the front panel 211 is provided on the hinge 214, the tape feed roller 22 is rotatably provided on the rear back plate 212, the tape feed member 213 is provided on the rear back plate 212, a tape feed groove 2130 is formed on the tape feed member 213, a first notch 2131 communicating with the tape feed groove 2130 is provided on the inner side of the tape feed member 213, and the tape feed roller 22 is rotatably provided on the rear back plate 212 at the first notch 2131;

In a state where the front panel 211 is closed, the front panel 211 and the rear panel 212 are disposed opposite to each other, and the tape feeding member 213 and the guide wheel are located between the front panel 211 and the rear panel 212, and the tape feeding groove 2130 forms the tape feeding passage between the front panel 211 and the rear panel 212.

Specifically, for the belt feeding module 2, after long-time feeding of the strapping belt, it is necessary to clean the debris in the belt feeding groove 2130 and maintain the belt feeding wheel, at this time, the front panel 211 may be opened in a flip-open manner to expose the belt feeding groove 2130 and the belt feeding wheel 22, so as to facilitate cleaning and maintenance of the operator.

In the tape feeding process, the feed roller 22 is brought into contact with the strapping tape through the first notch 2131, and the drive of the second drive member 23 rotates the feed roller 22 to drive the strapping tape to slide and feed in the tape feed groove 2130.

Among them, since one side of the front panel 211 is mounted on the hinge 214, the front panel 211 needs to be reliably closed when in use. For this purpose, the side of the front panel 211 remote from the hinge 214 can be bolted to the rear panel 212.

In order to conveniently limit the other side of the front panel 211, the other side of the rear panel 212 is provided with an elastic claw 215; in the closed state of the front panel 211, the elastic claw 215 is caught at the edge of the front panel 211.

In particular, the belt feed module 2 requires, during use, on the one hand, regular cleaning and maintenance and, on the other hand, timely adjustment and combing when the strapping belt is jammed in the belt feed groove 2130. For this reason, the other side of the front panel 211 is fixed by the elastic claw 215, and when the operator needs to open the front panel 211, the operator only needs to pull the front panel 211, so that the operator can open the front panel 211.

And, during the process of conveying the packing belt, the front panel 211 is in a closed state, and the elastic claw 215 can firmly clamp the edge of the front panel 211, so as to ensure that the front panel 211 reliably covers the belt conveying part 213 and the belt conveying wheel 22.

Further, in order to ensure that the feed roller 22 can be reliably driven and conveyed by the feed roller 22, the outside of the feed belt member 213 is provided with a second notch 2132 communicating with the feed belt groove 2130; the tape feed module 2 further includes a wheel frame 24, a pinch roller 25, and a pinch spring 26, the wheel frame 24 being rotatably provided on the tape feed housing 21 and located outside the tape feed member 213, the pinch roller 25 being rotatably provided on the wheel frame 24 and located at the second notch 2132, the pinch spring 26 abutting on the wheel frame 24 and configured to apply an elastic force to the wheel frame 24 such that the pinch roller 25 abuts on the tape feed roller 22.

Specifically, the wheel frame 24 is installed at the outside of the front plate 211 and the rear plate 212 and can rotate the pinch roller 25. The edge of the pinch roller 25 can protrude into the feed groove 2130 via the second recess 2132 and rest against the feed roller 22 under the action of the pinch spring 26.

During the transport of the strapping tape, the strapping tape is clamped between the feed roller 22 and the pinch roller 25 to ensure that the feed roller 22 is able to provide an effective driving force for the strapping tape such that the strapping tape is transported in the strap feed slot 2130.

Further, the belt module 2 further comprises a third driving member 27, the third driving member 27 being configured to drive the wheel carriage 24 to drive the pinch roller 25 away from the belt pulley 22.

Specifically, during normal tape feeding, the pinch spring 26 applies an elastic force to the wheel frame 24 so that the pinch roller 25 is pressed against the feed roller 22. While the strapping head is in the process of tightening the strapping band, the third drive element 27 will drive the wheel carriage 24 to rotate so that the pinch roller 25 is away from the feed roller 22, thereby ensuring that the strapping band can be reliably tightened.

Wherein the third driving part 27 comprises a first cylinder 271 and a swing arm 272, the swing arm 272 is provided with a convex structure (not labeled), one end of the swing arm 272 is rotatably installed on the belt feeding housing 21, the first cylinder 271 is hinged to the belt feeding housing 21 and the other end of the swing arm 272, and the convex structure is abutted against the free end of the wheel frame 24.

When it is necessary to drive the wheel frame 24 to rotate so that the pinch roller 25 is separated from the feed roller 22, the first cylinder 271 drives the swing arm 272 to rotate to jack up the wheel frame 24 by the convex structure, thereby separating the pinch roller 25 from the feed roller 22.

Still further, the tape feeding section 213 includes an outer guide (not labeled) and an inner guide (not labeled), which are respectively provided on the rear plate 212, with a tape feeding groove 2130 formed therebetween.

Specifically, for ease of processing, the belt feed member 213 is formed with a belt feed groove 2130 formed by inner and outer guide bars disposed inside and outside.

And in order to form the first notch 2131 and the second notch 2132, the outer conductive strips include a first outer conductive strip 2133 and a second outer conductive strip 2134, the first outer conductive strip 2133 and the second outer conductive strip 2134 are spaced apart, and the second notch 2132 is formed between the first outer conductive strip 2133 and the second outer conductive strip 2134; the inner guide bar comprises a first inner guide bar 2135 and a second inner guide bar 2136, the first inner guide bar 2135 and the second inner guide bar 2136 are arranged at intervals, and a first notch 2131 is formed between the first inner guide bar 2135 and the second inner guide bar 2136.

Still further, in order to facilitate guiding the strapping tape from the welding module 3 into the tape feed module 2 and precisely back to the welding module 3, the entire tape feed channel is of an arcuate configuration, with the inlet and outlet of the tape feed channel being located on the same side of the tape feed housing 21.

The belt module 2 further comprises an auxiliary belt slot 28, which auxiliary belt slot 28 is arranged at the bottom of the belt housing 21 below the belt conveyor. The auxiliary belt groove 28 has a strip-shaped structure as a whole, and the outlet of the auxiliary belt groove 28 is positioned below the outlet of the belt feeding passage.

Further, the belt feeding machine shell 21 is further provided with a detection mechanism 29, the detection mechanism 29 comprises a second air cylinder 291 and a first detection switch 292, the second air cylinder 291 is vertically arranged, the lower end portion of a piston rod of the second air cylinder 291 is provided with a first pressing plate 293, one side of the first pressing plate is provided with a first flanging structure 294, the first detection switch is arranged on the belt feeding machine shell 21, and the first detection switch is configured to detect the position of the first flanging structure.

Specifically, in the actual use process, the strapping machine head in the strapping machine needs to be close to the goods as much as possible in the process of feeding and welding the strapping tape. For this reason, the strapping head is required to be moved close to the load and then to be carried out in operations such as feeding, tensioning and welding. In order to precisely control the entire movement stroke of the strapping head during the approaching of the load, the strapping head is provided with a normally-ventilated second cylinder 291 for controlling the distance in cooperation with the first presser plate 293.

That is, when the first pressing plate 293 abuts against the goods in the moving process of the strapping machine head near the goods, the first pressing plate 293 is limited by the goods, so that the piston rod of the second air cylinder 291 can retract by internal air pressure, and in the retracting process, the first detection switch 292 can detect the first flanging structure 294 to trigger the strapping machine head to stop moving continuously, so that the distance between the strapping machine head and the goods is ensured to be within a set range.

In order to reduce the moving speed of the strapping head after approaching the load, a magnetic switch (not shown) may be provided to the second cylinder 291, and a magnet that cooperates with the magnetic switch may be provided to a piston rod of the second cylinder 291.

Specifically, since the second cylinder 291 is always ventilated during use, the magnetic switch is provided outside the cylinder body of the second cylinder 291 at a position near the inner end of the piston rod in the extended state. When the first pressing plate 293 is abutted against the goods to enable the piston rod to retract in use, after the magnet leaves the detection area of the magnetic control switch, the moving speed of the strapping machine head is controlled to be reduced, and the position of the strapping machine head in a stopped state is controlled more accurately.

The manner in which the strapping head moves on the strapping machine can be referred to as a conventional strapping machine, and specific control procedures are not limited and described in detail herein.

Furthermore, whether the packing belt outside the goods is broken or not can be timely detected in the tightening and welding processes of the packing belt, so that packing accuracy is improved. The detection mechanism 29 further includes a second detection switch 295, a second pressure plate 296, a resilient return member (not shown) disposed on the mounting block 297, the second detection switch 295 rotatably disposed on the mounting block 297 and configured to trigger the second detection switch 295 upon rotation of a force applied thereto, and a mounting block 297, the resilient return member disposed between the second pressure plate 296 and the mounting block 297.

In use, when the strapping head tightens the strapping band, the strapping band is released from the strapping head's strap feed module and welding module 3 and tightens against the exterior of the load, and the released strapping band will press against the second pressure plate 296 and cause the second pressure plate 296 to adhere to the surface of the load. The second pressure plate 296 will rotate when pulled by the strapping band and activate the second detection switch 295.

Before the strapping machine head does not move and reset, the second pressing plate 296 is always pressed on the surface of the goods, if the strapping tape breaks, the second pressing plate 296 resets under the action of the elastic reset piece because the strapping tape does not apply force to the second pressing plate 296, and the second pressing plate 296 does not trigger the second detection switch 295 any more, at this time, the situation that the strapping tape breaks can be known, and an operator is informed of the fact that the strapping tape breaks in time.

If the strapping band is not broken, the second pressure plate 296 is driven to continue to rotate during the reverse movement and resetting of the strapping head so that the second pressure plate 296 is disengaged from between the strapping band and the load. Wherein, in order to facilitate the second pressing plate 296 to separate from between the packing belt and the goods, the free end of the second pressing plate 296 is provided with a second flange 298, and the second flange 298 is blocked at the outer side of the auxiliary belt groove 28, so that the packing belt is pressed on the second flange 298 to drive the second pressing plate 296 to rotate after separating from the auxiliary belt groove 28.

In addition, a second air tap 216 may be provided between the front panel 211 and the rear panel 212.

Specifically, in the use process, after the second air nozzle 216 ventilates, air can be blown into the space between the front panel 211 and the back panel 212, and the debris is blown out in time by using the air blown by the second air nozzle 216. Thus, on one hand, the frequency of cleaning internal scraps by operators can be reduced, and on the other hand, the abrasion of the scraps on the feeding wheel caused by the scraps is reduced, so that the frequency of maintenance and replacement is reduced.

Claims (10)

1. A head for a strapping machine, comprising:

a mounting module comprising a mounting base;

the belt conveying module is provided with a belt conveying channel;

The welding module comprises a welding shell, a main shaft, a clamping mechanism, a welding mechanism and a first driving part; the welding machine shell comprises a shell body and an overhaul cover plate, wherein a mounting groove is formed in one surface of the shell body, an overhaul hole is formed in the surface of the shell body through the mounting groove, the overhaul cover plate is arranged on the shell body and is configured to cover the overhaul hole, the overhaul cover plate comprises a first overhaul plate, and the upper end part of the first overhaul plate is rotatably arranged on the shell body; the main shaft is transversely arranged and rotatably arranged on the shell, and a first cam and a second cam are arranged on the main shaft; the welding mechanism comprises a movable welding block and a static welding block which are arranged oppositely, and the clamping mechanism comprises a sliding clamping block and a fixed clamping block which are arranged oppositely; the clamping mechanism and the welding mechanism are arranged on the welding shell, the first cam, the second cam, the sliding clamping block and the movable welding block are arranged in the mounting groove and positioned in an overhaul area formed by the overhaul opening, and the first overhaul plate is configured to at least cover the outer sides of the sliding clamping block and the movable welding block in a closed state; the first driving part is configured to drive the main shaft to rotate, the first cam is configured to drive the movable welding block to be close to the static welding block, and the second cam is configured to drive the sliding clamping block to be close to the fixed clamping block;

The welding module and the belt feeding module are arranged on the mounting base, and the welding module and the belt feeding module can move relatively.

2. The machine head according to claim 1, wherein the clamping mechanism includes two lower clamping mechanisms, each of the lower clamping mechanisms including the sliding clamping block and the fixed clamping block arranged opposite to each other up and down; the lower clamping mechanism is positioned below the main shaft, and the welding mechanism is positioned between the two lower clamping mechanisms;

the first access panel is also configured to cover an exterior of the sliding clamp block of the lower clamp mechanism in a closed state.

3. The strapping machine head of claim 2 wherein the sliding clamp blocks of the lower clamp mechanism are located above the corresponding fixed clamp blocks and the movable weld block is located above the static weld block;

wherein the fixed clamping block and the static welding block of the lower clamping mechanism are arranged at the lower end part of the first access panel;

in addition, a third cam is provided on the main shaft and is configured to drive the first access panel to rotate.

4. The machine head for a strapping machine according to claim 3, wherein one side of the bottom of the housing is provided with a strap inlet hole and a strap inlet notch arranged up and down, and the other side of the bottom of the housing is provided with a strap outlet notch;

the lower end part of the first access board is provided with a mounting supporting plate, and the fixed clamping block and the static welding block of the lower clamping mechanism are detachably arranged on the mounting supporting plate;

the lower part of the first access board is also provided with a through hole, the welding module further comprises a rotating board, the upper end part of the rotating board is rotatably arranged on the shell, and the lower end part of the rotating board is provided with a spacing piece; a fourth cam is arranged on the main shaft and is configured to drive the first rotating plate access plate to rotate;

wherein, in the first access panel with the pivoted panel is in the closed condition, the installation layer board covers advance take breach with go out take the lower part of breach, the spacer inserts in the through-hole and be located move welding piece with between the quiet welding piece, the spacer is configured to guide the packing area that gets into from advance the area hole from the spacer upper surface direction is carried to go out take breach department.

5. The strapping machine head of claim 1 wherein the top of the weld enclosure is provided with a guide channel configured to guide the strap feed into the strap feed module;

the clamping mechanism further comprises an upper clamping mechanism, wherein the upper clamping mechanism is positioned above the main shaft, the upper clamping mechanism comprises a fixed clamping block and a sliding clamping block which are arranged up and down in an opposite mode, and the upper clamping mechanism is configured to clamp a packing belt passing through the guide belt channel;

the access panel further includes a second access panel removably disposed on the housing and above the first access panel, the second access panel configured to cover an exterior of the sliding clamping block of the upper clamping mechanism.

6. The strapping machine head of claim 1 wherein the mounting module further comprises a slide mount slidably disposed on the mounting base and a first drive member configured to drive the slide mount to reciprocate on the mounting base;

the belt feeding module is detachably arranged on the mounting base, and the welding module is detachably arranged on the sliding seat.

7. The head for a strapping machine of claim 6 wherein one side of the slide mount is provided with a plug-in portion and the other side of the slide mount is provided with a fixing hole; one side of the welding shell is provided with an inserting matching part, and the other side of the welding shell is provided with a mounting hole;

the plug-in part and the plug-in matching part are plugged together, and the bolt penetrates through the mounting hole and is connected with the fixing hole.

8. The head for a strapping machine of claim 1 wherein the strap feed module includes a strap feed housing, a strap feed roller, and a second drive member; the belt conveying machine shell comprises a front panel, a rear back plate and a belt conveying component, wherein a hinge is arranged on one side of the rear back plate, the front panel is arranged on the hinge, a belt conveying wheel is rotatably arranged on the rear back plate, the belt conveying component is arranged on the rear back plate, a belt conveying groove is formed on the belt conveying component, a first gap communicated with the belt conveying groove is formed in the inner side of the belt conveying component, and the belt conveying wheel is rotatably arranged on the rear back plate and located at the first gap;

in the front panel closed state, the front panel and the rear back panel are arranged opposite to each other, the tape feeding member and the guide wheel are located between the front panel and the rear back panel, and the tape feeding groove forms the tape feeding passage between the front panel and the rear back panel.

9. The strapping machine head of claim 8 wherein the outside of the strap feeding member is provided with a second notch communicating with the strap feeding slot;

the belt feeding module further comprises a wheel frame, a pressing wheel and a pressing spring, wherein the wheel frame is rotatably arranged on the belt feeding shell and positioned on the outer side of the belt feeding component, the pressing wheel is rotatably arranged on the wheel frame and positioned at the second notch, and the pressing spring abuts against the wheel frame and is configured to apply elastic force to the wheel frame so that the pressing wheel abuts against the belt feeding wheel.

10. A strapping machine including a packaging chute, further comprising a strapping machine head as in any one of claims 1-9 configured to cooperate with the packaging chute to form a delivery path for delivering strapping tape.