WO2011020249A1

WO2011020249A1 - Strap bundling device and top plate for fixing articles on pallet

Info

Publication number: WO2011020249A1
Application number: PCT/CN2009/073679
Authority: WO
Inventors: 钱佐成; 龚凯; 邱勇志; 杜争国
Original assignee: 上海鸿润科技有限公司
Priority date: 2009-08-21
Filing date: 2009-09-02
Publication date: 2011-02-24
Also published as: CN101992889A; CN101992889B

Abstract

A strap bundling device and a top plate for fixing articles on a pallet. The strap bundling device is installed on a bottom plate (10) of the top plate and includes a strap tightening device (44) for tightening a strap bundling (2), a driving device (45) for moving the strap tightening device (44), and a spring device for retracting the strap bundling (2) after the strap tightening device (44) releases the strap bundling (2). The driving device (45) includes: a main axle (13) rotatably supported by the bottom plate (10), a flexible component winding disk mounted on the main axle (13) and being synchronously rotatable with the main axle (13), a pulley block and a flexible component led from the flexible component winding disk. The flexible component is connected to the strap tightening device (44) after being guided by the pulley block. When the strap bundling (2) is tightened, the rotation of the main axle (13) is converted into the move of the strap tightening device (44) by means of the flexible component, and then the tightening strap device (44) tenses the strap bundling (2) of which the extended end has been fixed.

Description

Bundling device and top plate for fixing the tray on the tray

The present invention relates to a top plate for securing a tray on a tray and a strap device therefor, the strap device comprising a strapping device for tensioning the strap, a driving device for moving the strap device, A spring device that retracts the strap after the strap is loosened. Background technique

The Chinese Patent Application Publication No. CN1717356A discloses a "top plate for use on palletized goods", the top plate comprising a box body for strapping the bundle of goods through the slotted cross arm in the casing, The slotted cross arm is located between the cylinder of the take-up strap and the hook, and the hook has two hook teeth for hooking the underside of the pallet of the pallet, and the strap is interlocked by the cross arm and a joystick The mechanism is tensioned and the lever is pivoted between a non-operating and an operating position to rotate the cross arm and thereby wrap the strap around the cross arm. The linkage mechanism comprises a wire rope, a ratchet shaft, a ratchet drive claw mounted in the joystick, a lock claw mounted in the joystick, and a device capable of manually manipulating the drive claw from the ratchet. The wire rope is fixed at one end to the shaft and at the other end. It is fixed on the guide wheel disposed at one end of the cross arm, and the guide wheel rotates together with the cross arm. When the joystick moves from the non-operating position to the running position, the ratchet drive claw and the ratchet drive transmit the wire rope from the lead wheel, and at the same time The cross arm is rotated to wind the strap around the cross arm. The foregoing means for manually manipulating the drive pawl out of the ratchet includes a slider that can move the drive pawl, the head of the slider having two lateral projections that engage the ramp device as the slider slides toward the pawl The ramp device is coupled to the ratchet drive pawl to engage or disengage the ratchet drive pawl with the ratchet. The device is free of overloaded safety devices. If excessive force is applied to the strap, it will damage the bundled cargo or strap or break, so its reduced safety also directly affects the life of the device. Summary of the invention

It is an object of the present invention to provide a strapping device for restraining goods on a pallet and a linkage device of the strapping device, which effectively prevents accidents such as collapse, damage, etc. of the cargo on the pallet during transportation, and is also easy to operate. .

In order to achieve the aforementioned object, the strapping device of the present invention is disposed on a bottom plate, including a strapping device for tensioning the strap, a driving device for moving the strapping device, and a loosening strap in the strapping device. After the strap The retracted spring device is characterized in that: the driving device comprises: a main shaft rotatably supported by the bottom plate; a flexible member winding disc disposed on the main shaft, which can rotate synchronously with the main shaft; a pulley block; and a winding disc from the flexible member The lead-out flexible member is connected to the strap device via the pulley block, and when the strap is tensioned, the spindle converts its own rotation into the movement of the strap device by means of the flexure, and the strap device further tightens the protruding end. Fixed straps.

The strapping device is further characterized in that it further comprises an overload clutch, the flexure wrap is wound on the main shaft, and the overload clutch comprises an active part and a driven part, and the flexure winding disk is connected to the driven part or The driven part is integrally formed, the active part can rotate synchronously with the main shaft, and the active part and the driven part mesh. When the torque transmitted by the active part and the driven part exceeds the rated load of the overload clutch, the active part and the driven part are opposite. Sliding so that the power of the spindle cannot be transmitted to the flexure.

The strapping device is further characterized in that: the active portion of the overload clutch has a plurality of ribs, the roots of the plurality of ribs are distributed on a circumference and connected to form an annular body, and the active portion passes through the annular body sleeve Positioned on the main shaft, the plurality of ribs are inclined in the same direction of the circumference, and the driven portion of the overload clutch is a ratchet having a ratchet on the outer circumferential surface, and the ratchet has a plurality of grooves formed on the inner circumference thereof, the ratchet Nesting on the active portion such that the plurality of grooves respectively interfere with the plurality of ribs, thereby achieving a one-way transmission between the active portion and the driven portion, and the transmission torque exceeds the rated value of the overload clutch When the load is applied, the plurality of ribs are elastically deformed, so that the active portion and the driven portion slide relative to each other, and the ratchet wheel meshes with the pawl disposed on the bottom plate, and the ratchet wheel and the pawl are rotated when the main shaft rotates to tension the strap Relative sliding.

The strapping device is further characterized in that it further comprises a toothed one-way clutch, the toothed one-way clutch comprises a driving wheel and a driven wheel, the wheel surface of the driving wheel has a ratchet tooth, and the wheel surface of the driven wheel The ratchet surface of the driving wheel having the ratchet teeth and the wheel surface of the driven wheel having the ratchet teeth, the driving wheel and the driven wheel realize the one-way transmission through the engagement of the ratchet teeth on the opposite wheel surface, the driving wheel and the driven wheel are both The driving shaft is fixedly connected or integrally formed with the active part of the overload clutch, and the driving wheel is connected with the main shaft through the pin, the pin can be moved in the axial through groove of the driving wheel, and the main shaft rotates to tension the strap When the driving wheel and the driven wheel are driven in one direction.

The strapping device is further characterized by further comprising a toothed one-way clutch for disengaging the engaged state and said ratchet and pawl releasing means in an engaged state.

The strapping device is further characterized in that the releasing device comprises a boss disposed on the driving wheel, and a dial disposed on the spindle adjacent to the winding of the flexure, and a boss of the driving wheel Side has The inclined surface, one end of the pawl is fixed on the bottom plate. When the main shaft rotates in the opposite direction, the dial on the main shaft contacts the other end of the pawl, and the pawl is bent to be separated from the ratchet, and at the same time, the driving wheel is convex. The inclined surface of the table contacts the guiding member fixedly disposed on the bottom plate. During the reverse rotation of the main shaft, the inclined surface slides relative to the guiding member, and the guiding member thus applies a force along the axial direction of the main shaft to the driving wheel, and the driving wheel is at the force. Under the action of the axial movement of the main shaft, the driving wheel and the driven wheel are disengaged from each other, and the other side of the driving wheel is also pressed against the spring.

The strapping device is further characterized in that a limit boss is further disposed on the driving wheel, and the limiting boss is used to prevent an excessively large angle of rotation of the spindle when rotating in the reverse direction or in the forward direction.

The strap device further characterized in that it further comprises a handle, the handle is fixedly connected with the main shaft, and a spring is connected to an end of the main shaft away from the handle, the spring is disposed on the spring bracket on the bottom plate, and the handle is further disposed There is a button. When the handle is in the storage state, the button on the handle is fastened with a lock on the bottom plate. After the push button is disengaged from the lock on the bottom plate, the main shaft and the handle are ejected under the elastic force provided by the spring. The handle is moved from the storage state to a working state that is easy to hold.

The strapping device is further characterized in that: the driven wheel of the toothed one-way clutch and the active part of the overload clutch are formed on the cylindrical body, and the cylindrical body is sleeved on the main shaft, the cylindrical body An annular rib is formed on the wall of the hole.

The strapping device is further characterized in that: the strapping device comprises a card holder, a card board and a card striking block, and the card board is pivotally connected to the card board seat and the card board is disposed at the pivoting position a reset card reset spring, the card striker is disposed on the bottom plate, the card seat is slidably disposed on the bottom plate, the flexure is connected with the card holder, and the strap is provided between the card and the card holder Through the space, the card board is supported by the card striking block at the position away from the strap when the strap is not tensioned, and the card board leaves the card striking block when the strap is required to be tensioned and is provided in the card return spring. The spring force is rotated to a position where the strap is pressed against the bottom plate.

The strapping device is further characterized in that the pulley block comprises a movable pulley disposed on the card holder.

The strapping device is further characterized in that: a card seat return spring is connected between the card holder and the bottom plate, and the card seat is reset once the traction force acting on the card seat disappears. The spring pulls the card holder back to the initial position where the strap can move freely.

The strapping device is further characterized in that the card plate is deflected in a direction in which the strap is retracted by the spring device relative to the strap passing therebelow, at an angle to the vertical direction of the strap. Tightening bundle During the belt, the edge of the lower end of the card is rotated by the frictional force acting on the card due to the relative movement with the card holder toward the angle of the angle, and thus the strap is locked to the card. On the board seat.

The strapping device is further characterized in that: the lower end of the card for pressing the strap is formed with an anti-slip rib and a buckle, the latch being the edge of the lower end of the card, and the card The seat is formed with a non-slip groove, and the anti-slip rib of the card presses the strap into the anti-slip groove when the strap is tensioned, and the buckle is pressed tightly on the strap, and a limit block is formed on the card seat. The limiting block is used to prevent the card from slipping off the strap when it is over the vertical position of the lower strap during the tensioning of the strap.

The strapping device is further characterized in that the flexure is a wire rope.

The top plate for fixing the pallet on the tray of the present invention comprises a bottom plate, at least two strap devices disposed on the bottom plate, a cover for covering the bottom plate, and at least two respectively disposed on the at least two strap devices A strap strap, the at least two straps being extendable out of the bottom panel through the openings of the two opposite sides of the bottom panel, wherein each strap device is a strap device having any of the foregoing features.

The top plate is further characterized in that the four corners of the body of the cover are respectively provided with stacked ribs for effectively preventing collapse of the cargo.

The beneficial effects of the invention:

1. The cover with the strapping device of the present invention can effectively prevent accidents such as collapse and damage during cargo transportation.

2. The safety device provided in the driving device of the present invention can effectively prevent the strap from being too tight, so as to break the strap or damage the device.

3. The strapping device of the present invention has a simple structure and a remarkable effect, and is suitable for mass production, and can be widely used in fields such as logistics.

4. The four corners of the cover of the present invention have raised stacking ribs (or raised edges) which facilitate stacking of the trays, making the stack as a whole and not easily moving off. BRIEF abstract

Specific features and properties of the present invention are further exemplified by the following examples and the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the overall structure of a strapping device of the present invention.

Figure 2 is a schematic view showing the overall structure of a top plate to which the strapping device of the present invention is mounted.

Figure 3 is a schematic view showing the structure of the tightening device and the driving device of the present invention.

Fig. 4 is a view showing the operation of the tightening device and the driving device of the present invention. Figure 5 is a schematic view showing the structure of the strapping device of the present invention

Figure 6 is a schematic view of the working principle of the strapping device of the present invention, in which the strap has been compressed.

Figure 7 is a schematic view of the working principle of the strapping device of the present invention, wherein the strap is free to move.

Figure 8 is a schematic view showing the assembly of the overload clutch of the present invention.

Figure 9 is a schematic view showing the working principle of the overload clutch of the present invention.

Fig. 10 is a schematic view showing the mounting of the driven wheel and the main shaft of the toothed one-way clutch of the present invention.

Figure 11 is a partial enlarged view of A of Figure 10 .

Figure 12 is a schematic view showing the structure of a toothed one-way clutch of the driving device of the present invention, in which the gear one-way clutch is in an engaged state.

Figure 13 is a schematic view showing the structure of a toothed one-way clutch of the driving device of the present invention, in which the two portions of the gear one-way clutch are not completely separated.

Figure 14 is a schematic view showing the structure of a toothed one-way clutch of the driving device of the present invention, in which the two portions of the gear one-way clutch are completely separated.

Figure 15 is a schematic view showing the structure of a ratchet of the driving device of the present invention.

Figure 16 is a schematic view showing the operation of the drive unit of the present invention in which the gear one-way clutch is engaged.

Figure 17 is a schematic view of another working principle of the linkage of the present invention in which the two portions of the one-way clutch of the gear are separated.

Figure 18 is a schematic view showing the structure of a driving wheel of a dog type one-way clutch of the driving device of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

As shown in Fig. 1 and Fig. 3 to Fig. 4, the driving device 45 provided on the bottom plate 10 includes a winding handle or handle 11, a main shaft 13, a toothed one-way clutch 14-1, and an overload clutch 14-2. A winding handle 11 is attached to the outer end of the main shaft 13.

Referring also to Figures 12-14 and 16-17, the dog type one-way clutch 14-1 includes a drive wheel 47 and a driven wheel 48. The opposite wheel faces of the drive wheel 47 and the driven wheel 48 are formed with ratchet teeth, which are unidirectionally transmitted by the ratchet teeth.

Referring again to Figures 8-9, Figure 15, the overload clutch 14-2 includes an active portion 15 and a driven portion 16. The active portion 15 has a plurality of ribs 35, the roots of which are distributed over a circumference and joined to form an annular body 35-2. The active portion 15 is placed on the main shaft 13 through the annular body 35-2, and the plurality of ribs 35 are inclined in the same direction of the circumference. Oblique. The shape of the rib 35 is lobed.

The driven portion 16 of the overload clutch 14-2 is a ratchet having a ratchet on the outer circumferential surface. The inner circumference of the ratchet 16 is formed with a plurality of grooves 34, and the ratchet 34 is sleeved on the active portion 15, and the plurality of grooves 34 are respectively The plurality of ribs 35-1 are in contact with each other to realize a one-way transmission between the active portion 15 and the driven portion 16, and when the transmission torque exceeds the rated load of the overload clutch 14-2, the rib 35-1 occurs. The elastic portion is deformed such that the active portion 15 and the driven portion 16 slide relative to each other, and the ratchet 16 meshes with the pawl 28 provided on the base plate 10. When the spindle 13 rotates forward to tension the strap 27, the ratchet 16 and the pawl 28 are opposed to each other. Sliding, this prevents the strap from over-tightening the load.

As shown in FIG. 3, the main shaft 13 is provided with a through groove 130, and a shaft pin 54 movable along the through groove 130 is connected to the driving wheel 47, thereby connecting the driving wheel 47 with the main shaft 13, so that the driving wheel 47 can also be along the main shaft. The axial movement of 13 is not relatively rotatable between the two, and the length of the through groove 130 is the length of the winding handle 11 which can extend out of the bottom plate 10, and the driven wheel 48 is rotatably mounted on the main shaft 13. As shown in Fig. 4, Fig. 10, Fig. 12-14, the active portion 15 of the overload clutch 14-2 is fixedly coupled to the driven wheel 48, and the active portion 15 and the driven wheel 48 are also integrally formed.

As shown in Figs. 1, 3-4, and 16-17, the wire rope winding disk 30 is integrally formed with the ratchet 16 and the wire rope winding disk 30 has a groove 300 formed with a wound wire rope. The wire rope 27 is taken out from the winding disk 30, and guided and connected to the belt tightening device 44 via the fixed pulley 25, the fixed pulley 26, and the movable pulley 24.

The bottom plate 10 is provided with a support frame for supporting the main shaft 13 and the components on the positioning main shaft 13. The specific arrangement of the support frame may be determined according to specific needs. For example, a semi-circular hole may be provided on the support frame of the bottom plate 10, and another semi-circular hole may be disposed on the cover body 19 (shown in FIG. 2). A circular hole is formed through which the spindle passes, and the spindle can be rotated in the circular hole.

The above-described toothed one-way clutch in the engaged state and the above-described ratchet and pawl releasing means in the engaged state will be described with reference to Figs. 3-4, Figs. 8-9, and Figs.

Referring first to Figures 12-14 and 18, a boss 53 is provided on the outer circumference of the driving wheel 47. One side of the boss 53 has a slope 530. When the driving wheel 47 rotates counterclockwise (i.e., when the spindle is reversed), convex The table 53 is moved by the guide member 56 of the corresponding portion of the bottom plate 10 so that the driving wheel 47 moves away from the driven wheel 48, thereby being disengaged from the engaging state with the driven wheel 48. A finite boss 54 is also formed on the outer circumference of the driving wheel 47. The limiting boss 54 prevents the winding handle 11 from rotating excessively counterclockwise.

As shown in FIG. 4, a return spring 32 is disposed between the tightening handle 11 and the toothed one-way clutch 14, and the elastic force provided by the return spring 32 can ensure two parts of the toothed one-way clutch 14 (drive wheel 47, driven wheel) 48) Effectively mesh together.

Referring again to FIGS. 3-4 and 15, a dial block 29 is mounted on the main shaft 13 adjacent to the wire rope winding disk 30, and the dial block 29 is rotated with the main shaft 13 when the dial block 29 is rotated to the bottom plate 10 side. The region corresponding to the bottom plate 10 is provided with a pawl separating block 36 (the pawl separating block 36 can be formed as a part of the pawl 28), and one end of the pawl 28 is fixed to the bottom plate 10, and the pawl 28 The other end is fixedly coupled to the pawl separating dial 36. The area corresponding to the pawl separating block 36 on the bottom plate 10 is hollowed out. When the spindle 13 is angled, the dial 29 acts on the pawl separating block 36, and the pawl 28 is bent toward the bottom plate, so that The pawl 28 no longer acts on the ratchet 16, and the ratchet 16 is released in this state. The dial block 29 and the boss 53 of the driving wheel 47 are aligned in the axial direction, that is, when the spindle 13 is reversely rotated by an angle, the dial 29 on the spindle 13 contacts the pawl separating block 36 at the other end of the pawl 36. And the pawl 36 is thus bent to be separated from the ratchet 16, while the inclined surface 530 of the boss 53 of the driving wheel 47 contacts the guide member 56 fixedly disposed on the bottom plate 10, during the reverse rotation of the spindle 13, the boss The inclined surface 530 of the sliding member 530 slides relative to the guide member 56, and the guide member 56 thus exerts a force in the axial direction of the main shaft 13 on the driving wheel 47, and the driving wheel 47 moves in the axial direction of the main shaft 13 by the force, thereby the driving wheel. 47 is disengaged from the driven wheel 48.

As shown in FIG. 1 and FIG. 3 , a button 12 is disposed on the winding handle 11 , and a latch 49 is disposed on the bottom plate 10 corresponding to the button 12 , and a spring bracket 50 is disposed on the spindle 13 away from the end of the tightening handle 11 . A handle pop-up spring 31 is mounted in the spring bracket 50. Pressing the button 12 pushes the latch 49 out, and the handle 11 is ejected by the handle pop-up spring 31.

As shown in FIG. 3, one end of the wire rope 27 is fixed on the wire rope winding disk 30 and wound in the card slot of the wire rope winding disk 30, and the other end of the wire rope 27 is sequentially wound around the fixed pulley 25, the fixed pulley 26, and the movable pulley 24, and then fixed. On the bottom plate 10, the fixed pulley 25 and the fixed pulley 26 are fixed to the bottom plate 10.

As shown in Fig. 1, a winding disc 6 is provided on the bottom plate 10, and the winding disc 6 is used for winding and storing the strap 2, and the free end of the strap 2 is connected to the hook 1, and the hook 1 can hook the tray (not shown). frame. The winding disk 6 is provided with a winding disk fixing pin 9, and a disk spring 7 provided with the fixing pin 9 as a center shaft, and the winding disk cover 8 covers the winding disk 6.

As shown in Figures 4 to 7, the bottom plate 10 is further provided with a strapping device 44 for tightening the strap 2 when the hook 1 hooks the frame of the tray under the load. The strapping device 44 includes a card striking block 38 formed integrally with the bottom plate 10, and further includes a card board 4 mounted on the card board seat 3 via the card pin 43 and sleeved on the card pin 43 There is a card pressing spring 23, one end of the clamping spring 23 acts on the card 4, and the other end acts on the card On the board seat 3. The card board 4 can be relatively rotated along the card pin shaft 43 by the card pressing spring 23, and after the card board 4 is disengaged from the card striking block 38, under the action of the card pressing spring 23, Rotate down to tighten the strap 2 that passes underneath it. The card holder 3 can be moved in a square frame region on the bottom plate 10. The card holder 3 is provided with a movable pulley 24 and a card return spring 5, and one end of the card return spring 5 is fixedly connected with the card holder 3, The other end is fixed to the bottom plate 10. The strap tightening device 44 further includes a skid plate 39 disposed at an upper portion of the card holder 3, an anti-slip rib 40 at a lower end portion of the card board 4, and a lock buckle 42. The anti-slide plate 39 is provided with a non-slip groove 41, as shown in FIG. After the card plate collides with the block 38, the card plate 4 is rotated downward by the card pressing spring 23, and the anti-slip rib 40 enters the anti-slip groove 41, thereby pressing the band 2 into the anti-slip groove 41, and locking The edge of the lower end of the buckle 42 is also pressed against the strap 2, so that the card 4 can be more effectively pressed against the strap 2 passing therethrough. Referring to Figures 6 and 7, when the card holder 3 is moved to the left, the strap 2 is moved to the right with respect to the card 4, so that a rightward frictional force is applied to the lower end of the card 4, so that the card 4 obtains a counterclockwise The direction of the moment, the card 4 is deflected toward the direction in which the card holder 3 moves, and is deflected to the left in the figure, so that the card 4 rotates counterclockwise under the counterclockwise moment, with the card holder 3 moving to the left, the lower latch 42 of the card board 4 locks the strap 2 on the card holder 3, in order to prevent the rotation angle of the card board 4 in the counterclockwise direction from being too large, that is, over the position of the vertical strap 2, A retaining block 47 is also provided on the card holder 3, and as shown in Fig. 6, the limiting block 47 serves to prevent the card 4 from passing over the position perpendicular to the strap 2 under the friction of the strap 2.

As shown in FIG. 2, in the top plate for fixing the pallet on the tray, the cover includes a cover body 19, and a hand-held steel pipe 21 and a hanging groove 22 provided on the cover body 19, at least the aforementioned strapping device is disposed at the Between the cover body 19 and the bottom plate 10.

A stacking rib 20 is provided on the corner of the cover body 19. It can prevent the collapse of goods more effectively.

The operation of the strapping device of the present invention or the top plate for securing the tray on the tray will be described below. When the button 12 is pressed, the handle 11 is ejected under the action of the handle pop-up spring 31. At this time, the card striking block 38 acts on the card board 4, and the strap 2 can freely pass through the strapping device 44, pull out the strap 2, hook the frame of the lower tray of the cargo with the hook 1, and rotate the handle 11 clockwise. By the engagement of the toothed driving wheel 47 and the driven wheel 48, the ratchet 16 is rotated, and the wire rope 27 is wound in the slot of the wire rope winding disk 30. The pulling of the wire rope 27 causes the card seat 3 to face away from the card striking block 38. The direction is moved so that the card collision block 38 no longer acts on the card plate 4, and the card plate 4 is rotated downward to clamp the strap 2 passing through the lower portion thereof so that no relative movement between the strap 2 and the card holder 3 is caused. Thereby, the strap 2 and the card holder 3 are moved away from the card collision block 38, and the work of tightening the strap 2 is completed. When the tightening handle 11 is rotated counterclockwise by more than 90 degrees, the driving wheel 47 moves away from the driven wheel 48, thereby being disengaged from the engaging state of the driven wheel 48, and at the same time, the separating block boss 53 acts on the pawl separating. On the block 36, the pawl 28 is no longer applied to the ratchet 16, and the ratchet 16 is released in this state. At this time, the wire rope 27 does not act on the card holder 3, and the card holder 3 is at the card return spring 5. Under the action of moving toward the card striking block 38, the card striking block 38 is again applied to the card plate 4, and the strap 2 is quickly rewinded under the action of the disc spring 7, so that the hook 1 is stuck on the bottom plate 10. At the exit of the strap 2.

Claims

Rights request

1 . A strapping device, disposed on a bottom plate, comprising a strapping device for tensioning the strap, a driving device for moving the strapping device, and for strapping after the strapping device releases the strap A retracted spring device, characterized in that the driving device comprises:

a spindle rotatably supported by the bottom plate;

The flexible member is wound on the spindle, which is arranged on the spindle and can rotate synchronously with the spindle;

Pulley block

The flexible member is taken out from the winding member of the flexure, and is guided by the pulley block to connect the strap device. When the strap is tensioned, the spindle converts its own rotation into the movement of the strap device by means of the flexure, and the strap device In turn, the strap that has been fixed at the extended end is tightened.

2. The strapping device according to claim 1, further comprising an overload clutch, the flexure wrap is wound around the main shaft, and the overload clutch includes an active portion and a driven portion, and the flexure is wound from the disc. The moving part is integrally formed with the driven part, the active part can rotate synchronously with the main shaft, the active part and the driven part mesh, and when the torque transmitted by the active part and the driven part exceeds the rated load of the overload clutch, the active part and The driven portion slides relatively, so that the power of the spindle cannot be transmitted to the flexure.

3. The strapping device according to claim 2, wherein the active portion of the overload clutch has a plurality of ribs, the roots of the plurality of ribs are distributed on a circumference and connected to form an annular body, and the active portion passes The annular body is sleeved on the main shaft, the plurality of ribs are inclined in the same direction of the circumference, and the driven portion of the overload clutch is a ratchet having a ratchet on the outer circumferential surface, and a plurality of concaves are formed on the inner circumference of the ratchet a groove, the ratchet sleeve is disposed on the active portion, so that the plurality of grooves respectively interfere with the plurality of ribs, thereby implementing a one-way transmission between the active portion and the driven portion, and the transmission torque exceeds the When the rated load of the overload clutch is applied, the plurality of ribs are elastically deformed, so that the active portion and the driven portion slide relative to each other, and the ratchet wheel meshes with the pawl disposed on the bottom plate, and the ratchet wheel rotates positively to tension the strap, the ratchet Sliding relative to the pawl.

4. The strapping device according to claim 3, further comprising a toothed one-way clutch comprising a driving wheel and a driven wheel, the wheel surface of the driving wheel having a ratchet, a driven wheel The wheel surface has ratchet teeth, the wheel surface of the driving wheel with ratchet teeth and the wheel surface of the driven wheel with ratchet teeth, the main The movable wheel and the driven wheel realize one-way transmission through the engagement of the ratchet teeth on the opposite wheel surface. The driving wheel and the driven wheel are respectively sleeved on the driving shaft, and the driven wheel is fixedly connected with the active part of the overload clutch or integrally formed, and the driving wheel passes through the pin. Connected to the main shaft, the pin can move in the axial through groove of the driving wheel, and the driving wheel and the driven wheel are unidirectionally driven when the main shaft rotates to tension the strap.

5. The strapping device of claim 4, further comprising a release mechanism for separating the toothed one-way clutch in an engaged state and the ratchet and pawl in an engaged state.

6. The strapping device according to claim 5, wherein the releasing device comprises a boss disposed on the driving wheel and a dial disposed on the spindle adjacent to the winding of the flexure, the driving wheel One side of the boss has an inclined surface, and one end of the pawl is fixed on the bottom plate. When the main shaft is rotated at an angle, the dial on the main shaft contacts the other end of the pawl, and the pawl is bent to be separated from the ratchet. At the same time, the inclined surface of the boss of the driving wheel contacts the guiding member fixedly disposed on the bottom plate. During the reverse rotation of the main shaft, the inclined surface slides relative to the guiding member, and the guiding member thus acts on the driving wheel to apply a force along the axial direction of the main shaft. The driving wheel moves in the axial direction of the main shaft under the action of the force, so that the driving wheel and the driven wheel are disengaged from each other, and the other side of the driving wheel is also pressed against the spring.

7. The strapping device according to claim 6, wherein the driving wheel is further provided with a finite boss, wherein the limiting boss is used to prevent the spindle from rotating in a reverse rotation or a forward rotation. Big.

8. The strapping device according to claim 4, further comprising a handle, the handle being fixedly coupled to the main shaft, and a spring connected to the end of the main shaft away from the handle, the spring being disposed on the spring bracket on the bottom plate, The handle is further provided with a button. When the handle is in the storage state, the button on the handle is fastened with a buckle on the bottom plate, and after the push button is disengaged from the buckle on the bottom plate, the spindle and the handle provide the elastic force provided by the spring. The lower part is ejected, and the handle is moved from the storage state to the working state that is convenient for the hand.

9. The strapping device according to claim 4, wherein the driven wheel of the toothed one-way clutch and the active portion of the overload clutch are formed on the cylindrical body and are sleeved on the main shaft through the cylindrical body, An annular rib is formed on the wall of the cylinder body.

The strapping device according to claim 1, wherein the strapping device comprises a card holder, a card board and a card striking block, and the card board is pivotally connected to the card board seat and disposed at the pivoting position. There is a card plate return spring for resetting the card board, the card plate bumping block is disposed on the bottom plate, the card board seat is slidably disposed on the bottom plate, the flexure is connected with the card board seat, and between the card board and the card board seat Providing a space for the strap to pass through, the card board is supported by the card striking block at a position away from the strap when the strap is not tensioned, and the card board leaves the card striking block when the strap is required to be tensioned and is in the card The spring force provided by the plate return spring is rotated to a position where the strap is pressed against the bottom plate.

11. The strapping device according to claim 10, wherein the pulley block comprises a movable pulley disposed on the card holder.

12. The strapping device according to claim 10, wherein a card seat return spring is connected between the card holder and the bottom plate, and once the traction force acting on the card holder is lost, The card holder return spring pulls the card holder back to the initial position where the strap can move freely.

13. The strapping device according to claim 10, wherein the card plate is deflected in a direction in which the strap is retracted by the spring device with respect to a strap passing therebelow, and a vertical direction of the strap Forming an angle, in the process of tensioning the strap, the edge of the lower end of the card is rotated by the frictional force acting on the card due to the relative movement with the card holder toward the angle of the clip, and The strap is thus locked to the card holder.

The strapping device according to claim 13, wherein a lower end of the card for pressing the strap is formed with an anti-slip rib and a buckle, the latch being the edge of the lower end of the card The anti-slip groove is formed on the card seat, and the anti-slip rib of the card presses the strap into the anti-slip groove when the strap is tensioned, and the buckle is pressed tightly on the strap, and the card seat is further pressed on the card holder A limit block is formed which is used to prevent the card from slipping off the strap in the vertical position of the lower strap during the tensioning of the strap.

15. The strapping device of claim 1 wherein the flexure is a wire rope.

16. A top panel for securing a pallet on a pallet, comprising a bottom panel, at least two strapping devices disposed on the bottom panel, a cover for covering the bottom panel, and at least one of the at least two strapping devices respectively disposed on the tray Two straps, the at least two straps being extendable out of the bottom panel through the openings of the two opposite sides of the bottom panel, wherein each strap device is any one of claims 1 to 15. A strapping device as claimed in any of the preceding claims.

17. The top plate for securing a tray on a tray according to claim 16, wherein the four corners of the body of the cover are respectively provided with stacking ribs for effectively preventing goods The collapse.