CN215287331U - Banding area rises and tightly installs - Google Patents

Abstract

The utility model discloses a banding area rises and tightly installs, including main shaft and base, the lower extreme of main shaft is fixed to be set up on the base, follow supreme runner, tray, stop gear and the locating wheel of rotationally wearing to be equipped with in proper order down on the main shaft, the runner is rotationally fixed through the installation bearing on the main shaft, the locating wheel with be provided with the wind spring between the stop gear, the runner pass through the bolt with the tray links to each other, the banding area winding is in on the locating wheel, the locating wheel upper end is provided with hold-down mechanism. The utility model is provided with the limiting mechanism between the coil spring and the main shaft of the device, the limiting mechanism gradually releases the elastic potential energy of the coil spring to prevent the structure from being damaged, and the edge sealing belt is always kept in a tensioning state in the process, thereby ensuring the continuous edge sealing; and a pressing device for controlling the tightness of the limiting mechanism is arranged on the device, so that the tensioning effect of the edge sealing belt can be changed conveniently according to actual production, and the adaptability of the device is improved.

Description

Banding area rises and tightly installs

Technical Field

The utility model relates to a banding area rises and tightly technical field, concretely relates to banding area rises and tightly installs.

Background

The gypsum board is a material made of building gypsum as a main raw material, and is widely used for various buildings such as houses, office buildings, shops, hotels, industrial plants and the like.

The paper outlet device of current banding area generally uses the reel frame, install the banding area on the reel frame, the gyro wheel drives the banding area and pulls out from the reel frame, then the banding area passes through the banding device and carries out the banding to the gypsum board, but when gyro wheel pulling banding area, the reel frame easily rotates under inertial effect, drive the banding area that is more than and pull out, make the banding area not tight, be unfavorable for the seeing off of banding area, and the easy winding of the banding area of pulling out is in the same place, influence production.

The prior automatic tightening device for the edge sealing belt (with the publication number of CN110524722A) realizes the tightening of the edge sealing belt by depending on the potential energy of a coil spring and the friction force between the edge sealing belt and a tray, and has the defects that: in the process of stretching the edge sealing belt, if the friction force between the edge sealing belt and the tray is too large, the tension limit of the coil spring is exceeded, damage is caused, and the plate needs to be stopped when the elastic potential energy is released, so that continuous production is not facilitated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a banding area rises and tightly installs to solve the unable release of elastic potential energy of wind spring among the prior art, lead to the fragile technical problem of device.

In order to solve the above technical problem, the utility model particularly provides the following technical scheme:

the utility model provides a banding area rises and tightly installs, including main shaft and base, the lower extreme of main shaft is fixed to be set up on the base, follow supreme runner, tray, stop gear and the locating wheel of rotationally wearing to be equipped with in proper order down on the main shaft, the runner is rotationally fixed through the installation bearing on the main shaft, the locating wheel with be provided with the wind spring between the stop gear, the runner pass through the bolt with the tray links to each other, the banding area winding is in on the locating wheel, the locating wheel upper end is provided with hold-down mechanism.

As a preferred scheme of the utility model, the locating wheel top is provided with the installation cavity, the main shaft passes the installation cavity, stop gear with the coil spring all sets up in the installation cavity, just the inner circle crotch embedding of coil spring is in stop gear is last, the outer lane crotch embedding of coil spring in the locating wheel.

As a preferred scheme of the present invention, the limiting mechanism includes a gear plate fixedly mounted on the main shaft, and a rotating ring mounted on the gear plate, wherein a single tooth matched with a gear on the gear plate is mounted on the rotating ring, and the single tooth is clamped on the gear plate;

the rotating ring is rotatably and slidably mounted on the main shaft through a rotating bearing, and an inner ring hook of the coil spring is embedded in the outer side of the rotating ring.

As a preferred scheme of the utility model, hold-down mechanism include with spindle threaded connection's gland nut, gland nut's below is provided with two clamp plates, two the clamp plate between be provided with the pressure spring, be located the below the clamp plate sets up on the runner ring, the clamp plate with the pressure spring is worn to establish with sliding from top to bottom on the spindle.

As a preferred scheme of the utility model, the installation bearing includes fixed mounting and is in the lower slide in the main shaft outside, the inner wall fixed mounting of runner has the slide, the slide passes through the ball and is in slide on the lower slide, the both sides of ball are provided with the baffle, two the baffle respectively with the lower slide with the upper slide is connected.

As a preferred scheme of the utility model, rolling bearing is including installing the inside installation section of thick bamboo of rolling circle, the main shaft axial is passed an installation section of thick bamboo, an installation section of thick bamboo with be provided with sliding chamber between the main shaft, sliding chamber internally mounted has a plurality of sliding balls, sliding ball drives an installation section of thick bamboo slides and rotates on the outer wall of main shaft.

Compared with the prior art, the utility model following beneficial effect has:

the utility model discloses be provided with stop gear between the wind spring of device and main shaft, accumulate to the certain degree after at the elastic potential energy of wind spring, install the elastic potential energy of progressively releasing the wind spring at the inside stop gear of wind spring, prevent structural damage, and the banding area keeps at the tight state that rises always in the process, thereby guarantee going on continuously of banding, effectively improve work efficiency, and be provided with the closing device who is used for controlling the stop gear elasticity on it, be convenient for change the tight effect that rises of banding area according to actual production, improve the suitability of device.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

Fig. 1 is a schematic structural view of an automatic edge sealing device for gypsum boards according to an embodiment of the present invention;

fig. 2 is a schematic view of a partial structure of a cutting device according to an embodiment of the present invention;

fig. 3 is a schematic partial structure diagram of a positioning roller according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a tensioning device provided in the embodiment of the present invention;

fig. 5 is a schematic view of a partial structure of a limiting mechanism according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a mounting bearing according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a rotary bearing according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a water wetting apparatus according to an embodiment of the present invention.

The reference numerals in the drawings denote the following, respectively:

1-a frame; 2-a tensioning device; 3-a water dipping device; 4-a positioning device; 5-a cutting device; 6-a guide rail; 7-edge sealing; 8-a lifting rod; 9-a controller; 10-a pressing mechanism; 11-a rotational bearing;

201-a main shaft; 202-a base; 203-a wheel; 204-a tray; 205-a limiting mechanism; 206-positioning wheels; 207-mounting a bearing; 208-coil spring; 209-bolt; 301-a base plate; a 302-L-shaped rotating shaft; 303-water dipping roller; 304-a reservoir; 305-a water inlet pipe; 306-absorbent sponges; 401-mounting a plate; 402-positioning rollers; 403-edge rollers; 501-sliding seat; 502-a cutting knife; 601-a first track; 602-a second track; 111-mounting the cartridge; 112-a sliding ball;

2051-gear plate; 2052-rolling ring; 2053-single tooth; 2071-lower slide plate; 2072-upper slide plate; 2073-balls; 2074-baffle; 4021-a positioning cavity; 4022-tape feed end; 4023-a tape-out end; 5021-power converter; 5022, a tool apron; 5023, an electric heating knife; 5024, a power supply connector; 1001-compression nut; 1002-pressing plate; 1003-pressure spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 8, the utility model provides an automatic banding device of gypsum board, guide rail 6 including frame 1 and being the V type install respectively at guide rail 6's both ends and rise tight device 2 and positioner 4, just the department of buckling of guide rail 6 installs and is stained with water installation 3, it is equipped with banding area 7 to rise to overlap on the tight device 2, install on positioner 4 be used for with cutting off cutting device 5 that banding area 7 cut off, just banding area 7 is followed guide rail 6 passes after being stained with water installation 3 is stained with water positioner 4 fixes a position on the gypsum board.

The wetting device 3 is arranged at the tail part of the guide rail 6, and the cutting device 5 is arranged on the positioning device 4; the banding band 7 is installed on the guide rail 6, is connected with the water wetting device 3 along the guide rail 6, is positioned on the gypsum board by the positioning device 4 after the water wetting is finished, and is cut by the cutting device 5 after the positioning is finished.

The positioning device 4 comprises a mounting plate 401 mounted on the frame 1, and a positioning roller 402 and a binder roller 403 respectively arranged on the same side of the mounting plate 401, and the edge sealing strip 7 passes through the positioning roller 402 and is attached to a gypsum board; the cutting device 5 comprises a sliding seat 501 mounted on the mounting plate 401, and a cutting knife 502 arranged on the sliding seat 501, the positioning roller 402 and the edge pressing roller 403 are respectively arranged at two ends of the sliding seat 501, and the cutting knife 502 slides on the end surface of the mounting plate 401 through the sliding seat 501.

Guide rail 6 can lead the removal of banding area, avoids banding area 7 to be stained with after the water and other material like the dust contact, improves the banding effect, and is stained with water device 3 and installs the afterbody at guide rail 6, is favorable to avoiding the banding area to incline when removing.

The side of mounting panel 401 is provided with the gypsum board conveyer belt of installing in frame 1 surface, and the gypsum board conveyer belt is used for conveying the gypsum board, and simultaneously, for the better banding, the gypsum board conveyer belt will stretch out in the both sides of gypsum board.

The positioning roll 402, the cutting device 5 and the edge pressing roll 403 on the mounting plate 401 are mounted from left to right, a gypsum board on the gypsum board conveyor belt moves from left to right and sequentially passes through the positioning roll 402, the cutting device 5 and the edge pressing roll 403, the positioning roll 402 is arranged at the end of the gypsum board conveyor belt, when the gypsum board conveyor belt conveys the gypsum board, the end of the gypsum board is preferentially contacted, the positioning roll 402 can fold the two sides of the edge sealing belt inwards, so that the folded edge sealing belt can be just attached to the board edge of the gypsum board, the edge pressing roll 403 is arranged on the side of the mounting plate 401, the edge pressing roll 403 is used for compacting the edge sealing belt sleeved on the board edge of the gypsum board, and the edge sealing belt can be closely attached to the board edge of the gypsum board after being compacted due to the fact that water is attached to the inner side of the edge sealing belt, and the edge sealing operation is completed after the edge pressing is completed.

Particularly, the cutting device 5 is installed between the positioning roller 402 and the edge pressing roller 403, the edge sealing belt 7 is cut when the edge sealing belt 7 is positioned on a gypsum board to be pressed, edge pressing is performed again, the edge tilting phenomenon caused by the fact that the edge sealing belt 7 is cut in advance is prevented, the cutting knife 502 can slide between the positioning roller 402 and the edge pressing roller 403, the cutting range can be selected better, flaws caused by the fact that the length of the edge sealing belt 7 is not matched with the length of the gypsum board are prevented, and the edge sealing effect of the gypsum board is improved.

In this embodiment, when the cutting knife 502 is used for cutting the edge sealing tape 7, a gypsum board is easily cut, and a defect on the edge of the gypsum board is caused, so the cutting knife 502 adopts electric heating cutting, and the cutting knife 502 includes a power converter 5021, a knife holder 5022 and an electric heating knife 5023; the power converter 5021 is slidably mounted inside the sliding seat 501, the knife holder 5022 is mounted at the upper end of the power converter 5021, the electric knife 5023 is rotationally fixed on the knife holder 5022, and the sliding seat 501 is provided with a power supply connector 5024.

When the electric knife 5023 is close to the banding band 7, the banding band 7 can be broken, and the electric knife 5023 can melt the edge of the banding band 7, so that the banding band 7 is more attached to the gypsum board.

If the electric knife 5023 is controlled by manpower, time and labor are wasted, so a lifting rod 8 is arranged between the knife back of the electric knife 5023 and the knife holder 5022, the bottom end of the lifting rod 8 penetrates through the knife holder 5022 to be connected with a controller 9, and the controller 9 is arranged on the power converter 5021.

This controller 9 can control the lift of lifter 8, and when lifter 8 rose, electric knife 5023 stood upright and was close to banding area 7, realized the cutting, and when lifter 8 descended, electric knife 5023 fell down and kept away from banding area 7, stopped the cutting.

The connection relationship between the controller 9 and the lifting rod 8, the related circuit and control are the prior art

In this embodiment, the guide rail 6 includes a first rail 601 installed between the tensioning device 2 and the wetting device 3, and a second rail 602 installed between the wetting device 3 and the positioning device 4, the first rail 601 and the second rail 602 are installed on the frame 1 through a support rack 603, and the edge sealing belt 7 slides on the first rail 601 and the second rail 602; the end bend of the second track 602 is arranged on the positioning roller 402.

The height of the first track 601 is gradually increased when being close to the water wetting device 3, the height of the second track 602 is gradually reduced when being close to the positioning device, the height of the second track is the same at two sides of the water wetting device 3 and is lower than the water wetting device 3, the tensioning state of the edge sealing belt 7 is kept, the edge sealing belt 7 can horizontally move, meanwhile, in order to enable the edge sealing belt 7 to better complete edge sealing, the tail end of the second track 602 is bent to form a spiral structure, and when the edge sealing belt 7 penetrates into the positioning roller 402, the water wetting surface of the edge sealing belt 7 is attached to a gypsum board.

Specifically, the positioning roller 402 has the following structure: the positioning roller 402 is provided with a through positioning cavity 4021, two ends of the positioning cavity 4021 are respectively provided with a tape inlet end 4022 and a tape outlet end 4023, the tape inlet end 4022 is a flat rectangle, the tape outlet end 4023 is in contact with the side edge of the gypsum board and has a U-shaped structure matched with the side edge of the gypsum board, and the tail end of the second rail 602 is connected with the tape inlet end 4022.

Preferably, the tensioning device 2 comprises a main shaft 201 and a base 202, the lower end of the main shaft 201 is fixedly arranged on the base 202, a rotating wheel 203, a tray 204, a limiting mechanism 205 and a positioning wheel 206 are sequentially and rotatably arranged on the main shaft 201 from bottom to top in a penetrating manner, the rotating wheel 203 is rotatably fixed on the main shaft 201 through a mounting bearing 207, a coil spring 208 is arranged between the positioning wheel 206 and the limiting mechanism 205, the rotating wheel 203 is connected with the tray 204 through a bolt 209, the tray 204 is connected with the first track 601, and the edge sealing belt 7 is wound on the positioning wheel 206.

General tight device area that rises is big, and the automatic overspeed device tensioner of a present banding area publication number is: CN110524722A, rely on the potential energy of coil spring, the frictional force between banding area and the tray to realize the rising of banding area, the defect of this device is: in the process of stretching the edge sealing belt, if the friction force between the edge sealing belt and the tray is too large, the tension limit of the coil spring is exceeded, damage is caused, and the plate needs to be stopped when the elastic potential energy is released, so that continuous production is not facilitated. Therefore, in this embodiment, a limiting mechanism is disposed between the coil spring 208 and the main shaft 201 to solve the problem of over-stretching of the coil spring.

In this embodiment, an installation cavity is arranged above the positioning wheel 206, the spindle 201 penetrates through the installation cavity, the limiting mechanism 205 and the coil spring 208 are both arranged in the installation cavity, an inner ring hook of the coil spring 208 is embedded in the limiting mechanism 205, and an outer ring hook of the coil spring 208 is embedded in the positioning wheel 206.

When the edge sealing belt 7 is stretched, the edge sealing belt 7 drives the tray 204 to rotate, the tray 204 drives the positioning wheel 206 to rotate, the coil spring 208 accumulates elastic potential energy to drive the edge sealing belt 7 to retract, and the purpose of tensioning the edge sealing belt is achieved.

Specifically, the limiting mechanism 205 comprises a gear plate 2051 fixedly mounted on the main shaft 201, and a rotating ring 2052 mounted on the gear plate 2051, a single tooth 2053 matched with a gear on the gear plate 2051 is mounted on the rotating ring 2052, and the single tooth 2053 is clamped on the gear plate 2051;

the rotating ring 2052 is rotatably and slidably mounted on the main shaft 201 through a rotating bearing 11, and an inner ring hook of the coil spring 208 is embedded on the outer side of the rotating ring 2052.

The working principle of the limiting mechanism 205 is as follows: under normal conditions, the positioning wheel 206 rotates, the outer ring of the coil spring 208 contracts, but the single tooth 2053 is clamped on the gear plate 2051, and the inner ring of the coil spring 208 is relatively static and is acted by force; when the number of turns of the positioning wheel 206 is too large and reaches a critical point, the inner ring of the coil spring 208 drives the rotating ring 2052 to slide upwards and rotate, and the single tooth 2053 is disengaged from the gear plate 2051, so that the release of elastic potential energy is realized.

In this embodiment, a pressing mechanism 10 is further disposed on the positioning wheel 206, the pressing mechanism 10 includes a pressing nut 1001 in threaded connection with the main shaft 201, two pressing plates 1002 are disposed below the pressing nut 1001, a pressing spring 1003 is disposed between the two pressing plates 1002, the pressing plate 1002 located below is disposed on the rotating ring 2052, and the pressing plates 1002 and the pressing spring 1003 can be vertically slidably disposed on the main shaft 201 in a penetrating manner.

The positioning wheel 206 is inserted on the main shaft 201 in a vertically movable manner, the pressing mechanism 10 presses the rotating ring 2052 against the gear plate 2051, the pressure spring 1003 is used for providing enough pressure for the rotating ring 2052 to ensure that the single tooth 2053 is clamped inside the gear plate 2051, and the pressing nut 1001 at the top end of the main shaft 201 vertically moves to adjust the pressure of the single tooth 2053 on the gear plate 2051, so that the time for releasing the elastic potential energy of the inner ring of the coil spring 208 is adjusted, the tensioning effect of the edge sealing belt 7 is changed, and the larger the pressure is, the larger the tensioning force of the edge sealing belt 7 is.

In this embodiment, the rotor 203 rotates on the main shaft 201, but has no relative sliding tendency, and the structure of the mounting bearing 207 is as follows: the mounting bearing 207 includes a lower slide 2071 fixedly mounted on the outer side of the main shaft 201, an upper slide 2072 is fixedly mounted on the inner wall of the runner 203, the upper slide 2072 slides on the lower slide 2071 through a ball 2073, two baffles 2074 are arranged on two sides of the ball 2073, and the two baffles 2074 are respectively connected with the lower slide 2071 and the upper slide 2072.

Preferably, in order to match the limiting mechanism 205 with the pressing mechanism 11, the rotating ring 2052 rotates on the main shaft 201 and can also slide up and down, and the structure of the rotating bearing 11 is as follows: the rotating bearing 11 comprises an installation cylinder 111 installed inside the rotating ring 2052, the main shaft 201 axially penetrates through the installation cylinder 111, a sliding cavity is arranged between the installation cylinder 111 and the main shaft 201, a plurality of sliding balls 112 are installed inside the sliding cavity, and the sliding balls 112 drive the installation cylinder 111 to slide and rotate on the outer wall of the main shaft 201.

In this embodiment, the water wetting apparatus 3 includes a bottom plate 301, an L-shaped rotating shaft 302 is disposed through the bottom plate 301, a water wetting roller 303 is rotatably connected to a tail end of the L-shaped rotating shaft 302, the water wetting roller 303 is axially disposed on the L-shaped rotating shaft 302, a lowest point of the water wetting roller 303 is connected to the bottom plate 301, the first track 601 and the second track 602 are respectively disposed at two ends of the water wetting roller 303, and end portions of the first track 601 and the second track 602 are lower than a highest point of the water wetting roller 303;

the water storage tank 304 is arranged on the bottom plate 301, the water inlet pipe 305 is arranged above the bottom plate 301 through the support, the water outlet of the water inlet pipe 305 is arranged right above the water storage tank 304, the bottom of the water soaking roller 303 is rotatably arranged on the water storage tank 304, the water absorbing sponge 306 is arranged on the surface of the water soaking roller 303, the water soaking roller 303 extends to the upper side of the water storage tank 304, so that the water soaking roller 303 contacts the water storage tank 304 and extrudes the water absorbing sponge 306, and the edge sealing belt 7 is arranged on the water soaking roller 303 and penetrates through the space between the first track 601 and the second track 602.

In the water-wetting apparatus 3 of the present embodiment, the water-wetting roller 303 is transversely disposed on the L-shaped rotating shaft 302, a portion of the water-wetting roller 303 extends above the first track 601 and the second track 602, the edge-sealing tape 7 passes through the portion of the water-wetting roller 303, so as to tension the edge-sealing tape 7, and the edge-sealing tape 7 drives the water-wetting roller 303 to rotate. In this process, the water wetting roller 303 supplies water to the edge sealing tape 7 to wet the tape, thereby wetting the tape. The water absorption sponge 306 absorbs water from the water storage tank 304, water in the water absorption sponge 306 flows down under the action of gravity in the rotation process of the water wetting roller 303, so that water is extruded out and is just in contact with the edge sealing belt 7 at the position to wet the edge sealing belt 7, and when the water absorption sponge 306 at the position rotates out of the joint, the water absorption sponge absorbs water again, and the process is repeated in a circulating mode.

Through the arrangement, the water wetting device 3 absorbs water by using the water absorbing sponge 306, and discharges the water in the water absorbing sponge 306 by using the gravity action to be absorbed by the edge sealing belt 7, so that the structure is exquisite, and the water supply function is met.

Through the banding area tight device that rises of this embodiment, can realize when tensile banding area, progressively release the elastic potential energy of coil spring accumulation, avoid the coil spring to destroy under the condition that does not stop pulling the banding area to guarantee going on continuously of banding, and be provided with the closing device who is used for controlling the stop gear elasticity on it, be convenient for change the tight effect that rises of banding area according to actual production, improve the suitability of device.

The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.

Claims (6)

1. The utility model provides a banding area rises and tightly installs, its characterized in that, includes main shaft (201) and base (202), the lower extreme of main shaft (201) is fixed to be set up on base (202), supreme revolving wheel (203), tray (204), stop gear (205) and locating wheel (206) of rotationally wearing to be equipped with in proper order down on main shaft (201), revolving wheel (203) rotationally fixes through installation bearing (207) on main shaft (201), locating wheel (206) with be provided with between stop gear (205) wind spring (208), revolving wheel (203) through bolt (209) with tray (204) link to each other, banding area (7) winding is in on locating wheel (206), locating wheel (206) upper end is provided with hold-down mechanism (10).

2. The banding band tensioning device as claimed in claim 1, wherein a mounting cavity is arranged above the positioning wheel (206), the spindle (201) penetrates through the mounting cavity, the limiting mechanism (205) and the coil spring (208) are both arranged in the mounting cavity, an inner ring hook of the coil spring (208) is embedded on the limiting mechanism (205), and an outer ring hook of the coil spring (208) is embedded in the positioning wheel (206).

3. The banding band tensioning device as claimed in claim 2, wherein the limiting mechanism (205) comprises a gear plate (2051) fixedly mounted on the main shaft (201), and a rotating ring (2052) mounted on the gear plate (2051), a single tooth (2053) matched with a gear on the gear plate (2051) is mounted on the rotating ring (2052), and the single tooth (2053) is clamped on the gear plate (2051);

the rotating ring (2052) is rotatably and slidably mounted on the main shaft (201) through a rotating bearing (11), and an inner ring hook of the coil spring (208) is embedded in the outer side of the rotating ring (2052).

4. The banding band tensioning device as claimed in claim 3, wherein the pressing mechanism (10) comprises a pressing nut (1001) in threaded connection with the main shaft (201), two pressing plates (1002) are arranged below the pressing nut (1001), a pressing spring (1003) is arranged between the two pressing plates (1002), the pressing plate (1002) located below is arranged on the rotating ring (2052), and the pressing plate (1002) and the pressing spring (1003) are arranged on the main shaft (201) in a penetrating manner in a vertically sliding manner.

5. The banding band tensioning device as claimed in claim 1, wherein the mounting bearing (207) comprises a lower sliding plate (2071) fixedly mounted on the outer side of the main shaft (201), an upper sliding plate (2072) is fixedly mounted on the inner wall of the rotating wheel (203), the upper sliding plate (2072) slides on the lower sliding plate (2071) through balls (2073), baffles (2074) are disposed on two sides of the balls (2073), and the two baffles (2074) are respectively connected with the lower sliding plate (2071) and the upper sliding plate (2072).

6. The banding band tensioning device as claimed in claim 4, wherein the rotating bearing (11) comprises a mounting cylinder (111) mounted inside the rotating ring (2052), the spindle (201) axially penetrates through the mounting cylinder (111), a sliding cavity is arranged between the mounting cylinder (111) and the spindle (201), a plurality of sliding balls (112) are mounted inside the sliding cavity, and the sliding balls (112) drive the mounting cylinder (111) to slide and rotate on the outer wall of the spindle (201).

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