CN215754314U

CN215754314U - Tarpaulin folding and unfolding device and open top container with same

Info

Publication number: CN215754314U
Application number: CN202120528279.6U
Authority: CN
Inventors: 游坤发; 付瑞荣; 张旭钦
Original assignee: China International Marine Containers Group Co Ltd; CIMC Containers Holding Co Ltd; Zhangzhou CIMC Container Co Ltd
Current assignee: China International Marine Containers Group Co Ltd; CIMC Container Group Co Ltd; Zhangzhou CIMC Container Co Ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2022-02-08
Anticipated expiration: 2031-03-12

Abstract

The utility model discloses a tarpaulin folding and unfolding device and an open top container with the tarpaulin folding and unfolding device. The tarpaulin folding and unfolding device comprises a rotating shaft, a driving component and a rope; the rotating shaft is used for connecting the end part of the tarpaulin, the axial direction of the rotating shaft is vertical to the winding direction and the unfolding direction, and the rotating shaft is provided with a first rotating shaft end and a second rotating shaft end; the driving assembly is connected to the rotating shaft and is used for driving the rotating shaft to rotate so as to wind or unwind the awning cloth; the first end of the rope is rotatably sleeved at the first rotating shaft end from one side of the axis of the rotating shaft, and the second end of the rope is rotatably sleeved at the second rotating shaft end from the other side of the axis of the rotating shaft, so that the first rotating shaft end and the second rotating shaft end move synchronously and in the same direction along one of the winding direction and the unfolding direction. From this, at the in-process of coiling tarpaulin or expansion tarpaulin, can make the first pivot end and the second pivot end of pivot remove along coiling direction or expansion direction with same speed, avoid the both ends of pivot to remove asynchronous, and then avoid the expansion or coiling tarpaulin jamming.

Description

Tarpaulin folding and unfolding device and open top container with same

Technical Field

The utility model relates to the field of containers, in particular to a tarpaulin folding and unfolding device and an open top container with the tarpaulin folding and unfolding device.

Background

The existing container or logistics vehicle with a partially opened top covers the top opening of the box body through tarpaulin for sealing. During operation, a worker is required to climb the roof of the box and then unfold the tarpaulin to cover the top opening of the box or roll up the tarpaulin to open the top opening of the box. The operations of covering and opening the top opening of the box body are complicated, the efficiency is low and the danger hidden danger exists.

In order to solve the above problems, in the prior art, the open top container is provided with a rotating shaft for winding the tarpaulin. Sliding sleeves are sleeved at both ends of the rotating shaft. A cord is provided that is connected to the sliding sleeve. The sliding sleeve is pulled by the rope so that the rotating shaft moves along the length direction of the box body. A chain wheel and a chain are arranged. The sprocket is coaxially connected to the rotating shaft. The chain meshes with the sprocket. The chain extends along the length of the box. Therefore, in the process that the rotating shaft moves along the length direction of the box body, the rotating shaft can rotate through the matching of the chain wheel and the chain so as to wind or unfold the tarpaulin. But the ropes connected to both ends of the rotating shaft are two ropes. The sliding sleeve is pulled by the two ropes to drive the end part of the rotating shaft to move. Thus, the movement of the two ends of the rotating shaft may not be synchronized, which may cause the engagement of the sprocket and the chain to be stuck.

To this end, the present invention provides a tarpaulin folding and unfolding apparatus and an open top container having the same to at least partially solve the above problems.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content of the present invention is not intended to define key features or essential features of the claimed solution, nor is it intended to be used to limit the scope of the claimed solution.

To at least partially solve the above technical problems, the present invention provides a tarpaulin folding and unfolding apparatus for winding a tarpaulin in a winding direction and unfolding the tarpaulin in an unfolding direction opposite to the winding direction, the tarpaulin folding and unfolding apparatus comprising:

the rotating shaft is used for connecting the end part of the tarpaulin, the axial direction of the rotating shaft is vertical to the winding direction and the unfolding direction, and the rotating shaft is provided with a first rotating shaft end and a second rotating shaft end;

the driving assembly is connected to the rotating shaft and is used for driving the rotating shaft to rotate so as to wind or unwind the awning cloth; and

the first end of the rope is rotatably sleeved at the first rotating shaft end from one side of the axis of the rotating shaft, and the second end of the rope is rotatably sleeved at the second rotating shaft end from the other side of the axis of the rotating shaft, so that the first rotating shaft end and the second rotating shaft end move synchronously and in the same direction along one of the winding direction and the unwinding direction.

According to the tarpaulin folding and unfolding device, the first end of the rope is rotatably sleeved at the first rotating shaft end from one side of the axis of the rotating shaft, the second end of the rope is rotatably sleeved at the second rotating shaft end from the other side of the axis of the rotating shaft, and in the process of winding or unfolding the tarpaulin, the first rotating shaft end and the second rotating shaft end of the rotating shaft can move along the winding direction or the unfolding direction at the same speed, so that the two ends of the rotating shaft are prevented from moving asynchronously, and the tarpaulin is prevented from being unfolded or wound.

Optionally, the rope comprises:

the first end of the first rope is rotatably sleeved at the first rotating shaft end from the first side of the axis, and the second end of the first rope is rotatably sleeved at the second rotating shaft end from the second side of the axis; and

the first end of the second rope is rotatably sleeved at the first rotating shaft end from the second side of the axis, and the second end of the second rope is rotatably sleeved at the second rotating shaft end from the first side of the axis, so that the first rotating shaft end and the second rotating shaft end can synchronously move in the same direction along the winding direction and the unwinding direction.

Optionally, the first cord and the second cord are arranged crosswise to form a figure-8 configuration.

Optionally, the drive assembly comprises:

a first sprocket;

a second sprocket spaced apart from the first sprocket;

the movable chain wheel is fixedly connected to the rotating shaft and is coaxially arranged with the rotating shaft, and the movable chain wheel is positioned between the first chain wheel and the second chain wheel; and

the chain is sleeved on the first chain wheel and the second chain wheel and meshed with the first chain wheel, the second chain wheel and the movable chain wheel.

Alternatively, the chain engages the moving sprocket from above.

Optionally, the first end of the cord is configured in a first loop configuration and the second end of the cord is configured in a second loop configuration.

Optionally, the tarpaulin folding and unfolding device further comprises a bearing, an inner hole of the bearing is sleeved on and connected to the periphery of the rotating shaft, and the rope is sleeved on the periphery of the bearing.

Optionally, the tarpaulin folding and unfolding apparatus further comprises a steering wheel rotatably provided to both sides of the axis of the rotating shaft, and the rope is steered by the steering wheel.

Optionally, the tarpaulin folding and unfolding apparatus further comprises a tarpaulin.

The utility model also provides an open top container which comprises the tarpaulin folding and unfolding device.

According to the open top container, the open top container comprises the tarpaulin folding and unfolding device, the first end of the rope is rotatably sleeved at the first rotating shaft end from one side of the axis of the rotating shaft, the second end of the rope is rotatably sleeved at the second rotating shaft end from the other side of the axis of the rotating shaft, and in the process of winding or unfolding the tarpaulin, the first rotating shaft end and the second rotating shaft end of the rotating shaft can move along the winding direction or the unfolding direction at the same speed, so that the two ends of the rotating shaft are prevented from moving asynchronously, and the tarpaulin is prevented from being unfolded or wound.

Drawings

In order that the advantages of the utility model will be readily understood, a more particular description of the utility model briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the utility model and are not therefore to be considered to be limiting of its scope, the utility model will be described and explained with additional specificity and detail through the use of the accompanying drawings.

Fig. 1 is a schematic top view of a tarpaulin folding and unfolding apparatus according to a preferred embodiment of the present invention, in which only a portion of ropes is shown;

FIG. 2 is a partial schematic view of a perspective view of the tarpaulin folding and unfolding apparatus of FIG. 1, wherein the rotating shaft is moved in the unfolding direction D3, wherein only a part of the ropes is shown;

FIG. 3 is another partial schematic view of a perspective view of the tarpaulin folding and unfolding apparatus of FIG. 1, wherein the rotating shaft is moved in a winding direction D2, wherein only a part of the ropes is shown; and

fig. 4 is a schematic view illustrating a rotation shaft, a rope, and a reverse wheel of the tarpaulin folding and unfolding apparatus of fig. 1 coupled together.

Description of the reference numerals

110: rotating shaft 111: first rotating shaft end

112: second shaft end 120: tarpaulin

130: the driving assembly 131: movable chain wheel

132: chain 133: first chain wheel

134: second sprocket 140: rope

141: first end 142: second end

143: first rope 144: second rope

150: bearing 160: box body

170: the steering wheel 171: first steering wheel

172: second steering wheel 173: third steering wheel

174: fourth steering wheel

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the utility model may be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail so as not to obscure the embodiments of the utility model.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It is to be understood that the terms "upper", "lower", and the like are used herein for purposes of illustration only and are not to be construed as limiting.

Ordinal words such as "first" and "second" are referred to herein merely as labels, and do not have any other meaning, e.g., a particular order, etc. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component".

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the utility model. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The following detailed description of preferred embodiments of the utility model, however, the utility model is capable of other embodiments in addition to those detailed.

The utility model provides a tarpaulin folding and unfolding device. The tarpaulin folding and unfolding device can be used for trucks, open-top containers and trains. The tarpaulin stretching device is used for opening a container as an example. The open top container has a tarpaulin 120. The tarpaulin 120 is used to shield a top opening of the open top container.

Referring to fig. 1 to 4, the tarpaulin folding and unfolding apparatus includes a rotating shaft 110. The rotation shaft 110 may be made of round steel or a circular tube. The axis direction D1 of the rotating shaft 110 is set along the width direction (the left-right direction in fig. 1) of the container body 160 of the open top container. The hinge 110 is overlapped to the upper surfaces of both top side beams of the open top container.

One end of the tent cloth 120 (the upper end of the tent cloth 120 in fig. 1) may be fixedly connected to the top end of the cabinet 160. The rotation shaft 110 is connected to the other end of the tent cloth 120. Thus, the rotation shaft 110 moves in a longitudinal direction (vertical direction in fig. 1) of the box 160 while rotating the upper surface of the roof side rail to wind or unwind the tent cloth 120.

Note that the longitudinal direction of the box 160 is parallel to the winding direction D2 and the unwinding direction D3. The winding direction D2 is opposite to the unwinding direction D3. When the rotating shaft 110 moves in the winding direction D2, the rotating shaft 110 winds the tent cloth 120. When the rotation shaft 110 moves in the unfolding direction D3, the tent cloth 120 is unfolded.

It will be appreciated that in embodiments not shown, the axial direction of the shaft may also be arranged along the length of the housing. At this time, both the winding direction D2 and the unwinding direction D3 are parallel to the width direction of the cabinet.

As shown in fig. 1 to 3, the tarpaulin folding and unfolding apparatus further includes a driving assembly 130. The driving assembly 130 includes a moving sprocket 131. The moving sprocket 131 is fixedly coupled (e.g., welded or keyed) to the rotating shaft 110 and is disposed coaxially with the rotating shaft 110. Thus, the moving sprocket 131 moves together with the rotation shaft 110, and the moving sprocket 131 is not rotatable with respect to the rotation shaft 110.

Preferably, the moving sprocket 131 is connected to the first shaft end 111 of the rotating shaft 110. Thus, the following chain 132, first sprocket 133, and second sprocket 134 are located on one side of the box 160 along the axial direction D1 of the rotating shaft 110. Therefore, the tarpaulin folding and unfolding device is simple in structure. It will be appreciated that in an embodiment not shown, a moving sprocket, a chain, a first sprocket, and a second sprocket may be provided on both sides of the case along the axial direction D1 of the rotating shaft.

With continued reference to fig. 1-3, the driving assembly 130 further includes a first sprocket 133, a second sprocket 134, and a chain 132. The first sprocket 133 is coupled to a first predetermined position of the body 160 of the open top container and is rotatably disposed. The second sprocket 134 is connected to a second predetermined position of the body 160 of the open top container and is rotatably disposed. There is a spacing between the first preset position and the second preset position in either the winding direction D2 or the unwinding direction D3. Preferably, the first preset position is located at one end of the case 160. The second preset position is located at the other end of the case 160.

The chain 132 is a closed loop structure connected end to end. The chain 132 is sleeved and engaged to the first and

second sprockets

133 and 134. Thus, the chain 132 can be driven to move by rotating the first sprocket 133 or the second sprocket 134.

Preferably, the first sprocket 133 or the second sprocket 134 may be driven by a human power. In an embodiment not shown, the tarpaulin folding and unfolding apparatus may also comprise a driving motor. An output shaft of the driving motor is connected to the first sprocket 133 or the second sprocket 134 to drive the first sprocket 133 or the second sprocket 134 to rotate.

The first sprocket 133, the moving sprocket 131, and the second sprocket 134 are sequentially spaced in the winding direction D2 or the unwinding direction D3. That is, the moving sprocket 131 is located between the first sprocket 133 and the second sprocket 134 in the winding direction D2 or the unwinding direction D3.

The moving sprocket 131 is located within the closed loop of the chain 132. The chain 132 is engaged to the moving sprocket 131. Thus, the moving chain 132 is engaged with the moving sprocket 131, so that the rotation shaft 110 is moved in the winding direction D2 to wind the tent cloth 120 while rotating, or moved in the unwinding direction D3 to unwind the tent cloth 120. Further, the engagement of the chain 132 and the moving sprocket 131 may guide the movement of the rotating shaft 110 in the winding direction D2 and the movement in the unwinding direction D3.

Preferably, the chain 132 is engaged to the moving sprocket 131 from above in the height direction of the case 160. Thus, the chain 132 can prevent the rotation shaft 110 from being disengaged from the top side member by applying a force to the rotation shaft 110 to press the rotation shaft against the top side member by moving the sprocket 131.

Referring to fig. 1 to 4, the tarpaulin folding and unfolding apparatus further comprises a rope 140. Cord 140 includes a first cord 143 and a second cord 144. The first and

second cords

143, 144 are both taut and movable. The rope 140 may be a stainless steel wire rope.

In each cord 140, first end 141 is configured in a first looped configuration. The second end 142 is configured in a second annular configuration. The first ring structure is sleeved on the first rotating shaft end 111 through a later bearing 150. The second annular structure is sleeved on the second rotating shaft end 112 through a later bearing 150. In this way, both the first and second annular structures may rotate relative to the shaft 110.

As shown in fig. 4, in each of the ropes 140, the first end 141 of the rope 140 is connected to the first shaft end 111 from one side of the axis of the shaft 110 in the winding direction D2 or the unwinding direction D3. The second end 142 of the cable 140 is connected to the second shaft end 112 from the other side of the axis of the shaft 110.

The first end 141 of the first rope 143 is connected to the first shaft end 111 from a first side of the axis of the shaft 110 (in fig. 4, a lower side of the axis of the shaft 110) in the winding direction D2 or the unwinding direction D3. The second end 142 of the first rope 143 is connected to the second shaft end 112 from the second side of the axis of the shaft 110 (in fig. 4, the upper side of the axis of the shaft 110).

When the first shaft end 111 of the rotating shaft 110 is moved in the winding direction D2, the rotating shaft 110 applies a winding force to the first end 141 of the first rope 143 in the winding direction D2. The winding force is applied to the second shaft end 112 of the shaft 110 through the second end 142 of the first rope 143, thereby moving the second shaft end 112 of the shaft 110 and the first shaft end 111 synchronously in the winding direction D2.

The first end 141 of the second rope 144 is connected to the first rotation shaft end 111 from the second side of the axis of the rotation shaft 110 (in fig. 4, the upper side of the axis of the rotation shaft 110) in the winding direction D2 or the unwinding direction D3. The second end 142 of the second cord 144 is connected to the second spindle end 112 from a first side of the axis of the spindle 110 (in fig. 4, the lower side of the axis of the spindle 110).

When the first shaft end 111 of the shaft 110 is moved in the unwinding direction D3, the shaft 110 applies an unwinding force to the first end 141 of the second cord 144 in the unwinding direction D3. The unwinding force is applied to the second pivot end 112 of the pivot 110 via the second end 142 of the second cord 144, thereby causing the second pivot end 112 and the first pivot end 111 of the pivot 110 to move in the unwinding direction D3 in unison.

Preferably, the portion of the cord 140 connected to its first end 141 and the portion connected to its second end 142 each extend in either the winding direction D2 or the unwinding direction D3. Thus, the rope 140 has a simple structure.

Preferably, as shown in fig. 4, the tarpaulin folding and unfolding apparatus further includes a steering wheel 170. In the winding direction D2, the turning wheels 170 are disposed on both sides of the rotating shaft 110. The aforementioned rope 140 extends over a diverting pulley 170 to effect the diversion.

Specifically, the steerable wheels 170 include a first steerable wheel 171, a second steerable wheel 172, a third steerable wheel 173, and a fourth steerable wheel 174.

The first rope 143 extends from the first shaft end 111 of the rotating shaft 110 past the first diverting pulley 171 to realize a diverting extending in the axial direction D1 of the rotating shaft 110 from the extending in the winding direction D2 or the unwinding direction D3. And then sequentially extends through the second diverting pulley 172 and the third diverting pulley 173 to extend from the first side to the second side of the rotating shaft 110. And then extends to the second shaft end 112 of the rotating shaft 110 after passing through the fourth steering wheel 174 to achieve the extension in the winding direction D2 or the unwinding direction D3 from the extending direction D1.

The second rope 144 extends from the first shaft end 111 of the rotating shaft 110 past the first diverting pulley 171 to realize a diverting extending in the axial direction D1 of the rotating shaft 110 from the extending in the winding direction D2 or the unwinding direction D3. And then sequentially extends through the second diverting pulley 172 and the third diverting pulley 173 to extend from the second side to the first side of the rotating shaft 110. And then extends to the second shaft end 112 of the rotating shaft 110 after passing through the fourth steering wheel 174 to achieve the extension in the winding direction D2 or the unwinding direction D3 from the extending direction D1.

Preferably, the tarpaulin folding and unfolding apparatus further comprises a winch (not shown). The winch may be a prior art winch. The winch is connected to the first rope 143 by a winch rope. For example to the portion of the first rope 143 between the first spindle end 111 and the first diverting pulley 171. The winch is configured to apply a force to the first pivot end 111 via the first cable 143 to move the first pivot end 111 in the unwinding direction D3. Preferably, the direction of the force is along the deployment direction D3.

Referring to fig. 2 and 4, when the tent cloth 120 is wound on the rotation shaft 110, the winch is operated to apply a force in the unwinding direction D3 to the first rotation shaft end 111 through the first rope 143, thereby moving the first rotation shaft end 111 of the rotation shaft 110 in the unwinding direction D3. During the movement of the first rotating shaft end 111 in the unwinding direction D3, the first rotating shaft end 111 and the second rotating shaft end 112 move (synchronously) in the unwinding direction D3 at the same speed due to the first rope 143, so that the two ends of the rotating shaft 110 are prevented from moving asynchronously. In this process, the rotation shaft 110 rotates to unfold the tent cloth 120 due to the action of the tent cloth 120 and the cooperation of the moving sprocket 131 and the chain 132.

Referring to fig. 3 and 4, the first sprocket 133 or the second sprocket 134 is rotated in the direction D4 to move the chain 132. At this time, the moving chain 132 may rotate the moving sprocket 131 in the direction D4, and further rotate the rotating shaft 110 in the direction D4. The rotating shaft 110 may wind the tent cloth 120. During the process that the rotating shaft 110 winds the tarpaulin 120, the rotating shaft 110 may be moved in the winding direction D2 due to the tarpaulin 120 and the engagement of the moving sprocket 131 and the chain 132. During the movement of the rotating shaft 110 in the winding direction D2, the first rotating shaft end 111 and the second rotating shaft end 112 move (synchronously) in the unwinding direction D2 at the same speed due to the action of the second rope 144, so as to prevent the two ends of the rotating shaft 110 from moving asynchronously.

It will be appreciated that in an embodiment not shown, the first or second sprocket may also be rotated in a direction opposite to the direction of D4 to move the chain. At this time, the moving chain may rotate the moving sprocket in the direction opposite to the direction of D4, and then rotate the rotation shaft in the direction opposite to the direction of D4, to unfold the tent cloth 120.

In this embodiment, the first end 141 of the rope 140 is rotatably sleeved at the first rotating shaft end 111 from one side of the axis of the rotating shaft 110, and the second end 142 of the rope 140 is rotatably sleeved at the second rotating shaft end 112 from the other side of the axis of the rotating shaft 110, so that the first rotating shaft end 111 and the second rotating shaft end 112 of the rotating shaft 110 can move at the same speed in the winding direction D2 or the unwinding direction D3 during the process of winding the tarpaulin 120 or unwinding the tarpaulin 120, thereby preventing the two ends of the rotating shaft 110 from moving asynchronously and further preventing the awning cloth 120 from being unwound or wound.

Preferably, as shown in fig. 4, the first cord 143 and the second cord 144 are arranged crosswise to form a substantially 8-shaped structure. Therefore, the tarpaulin folding and unfolding device is simple in structure.

Referring back to fig. 1 to 3, the tarpaulin folding and unfolding apparatus further includes two bearings 150. A bearing 150 is coupled to the first shaft end 111 of the shaft 110. Another bearing 150 is connected to the second shaft end 112 of the shaft 110. Specifically, the inner hole of the bearing 150 is fitted and connected to the outer circumference of the rotation shaft 110. The first and second loop structures of the rope 140 are sleeved and fixed to the outer circumferential surface connected to the bearing 150. Thereby, the rotation of the rotation shaft 110 is smoother.

It is understood that in an embodiment not shown, the first and second rope may also consist of one complete rope. The two ends of the rope are now configured as a first loop. A substantially middle portion of the cord is strapped into a second loop configuration. The second annular structure is sleeved at a second rotating shaft end of the rotating shaft. The two first annular structures are sleeved at the first rotating shaft end of the rotating shaft. That is, the second loop structure divides the rope into two portions. One part corresponds to the first rope and the other part corresponds to the second rope.

The utility model also provides an open top container. The open top container comprises the tarpaulin folding and unfolding device.

In this embodiment, the open top container includes the tarpaulin retracting device, the first end 141 of the rope 140 is rotatably sleeved on the first rotating shaft end 111 from one side of the axis of the rotating shaft 110, and the second end 142 of the rope 140 is rotatably sleeved on the second rotating shaft end 112 from the other side of the axis of the rotating shaft 110, so that the first rotating shaft end 111 and the second rotating shaft end 112 of the rotating shaft 110 can move at the same speed along the winding direction D2 or the unwinding direction D3 in the process of winding the tarpaulin 120 or unwinding the tarpaulin 120, thereby preventing the two ends of the rotating shaft 110 from moving asynchronously and further preventing the tarpaulin 120 from being unwound or wound.

The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the utility model to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Terms such as "component" and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the scope of the described embodiments. It will be appreciated by those skilled in the art that many variations and modifications may be made to the teachings of the utility model, which fall within the scope of the utility model as claimed.

Claims

1. A tarpaulin folding and unfolding apparatus for winding a tarpaulin in a winding direction and unfolding the tarpaulin in an unfolding direction opposite to the winding direction, the tarpaulin folding and unfolding apparatus comprising:

the rotating shaft is used for being connected with the end part of the tarpaulin, the axial direction of the rotating shaft is perpendicular to the winding direction and the unfolding direction, and the rotating shaft is provided with a first rotating shaft end and a second rotating shaft end;

2. The tarpaulin folding and unfolding apparatus of claim 1, wherein the rope comprises:

the first end of the second rope is rotatably sleeved at the first rotating shaft end from the second side of the axis, and the second end of the second rope is rotatably sleeved at the second rotating shaft end from the first side of the axis, so that the first rotating shaft end and the second rotating shaft end can synchronously and simultaneously move along the winding direction and the unwinding direction.

3. The tarpaulin folding and unfolding apparatus of claim 2, wherein the first and second ropes are crossed to form a figure-8 structure.

4. The tarpaulin folding and unfolding apparatus of claim 1, wherein the driving assembly comprises:

a first sprocket;

a second sprocket spaced apart from the first sprocket;

a chain sleeved to the first and second sprockets and engaged to the first, second, and moving sprockets.

5. The tarpaulin folding and unfolding apparatus of claim 4, wherein the chain is engaged to the moving sprocket from above.

6. The tarpaulin retracting device of claim 1, wherein a first end of the rope is configured in a first loop configuration and a second end of the rope is configured in a second loop configuration.

7. The tarpaulin folding and unfolding apparatus of claim 1, wherein the tarpaulin folding and unfolding apparatus further comprises a bearing, an inner hole of the bearing is sleeved and connected to an outer circumference of the rotating shaft, and the rope is sleeved on the outer circumference of the bearing.

8. The tarpaulin folding and unfolding apparatus of claim 1, further comprising a steering wheel rotatably provided to both sides of an axis of the rotating shaft, wherein the rope is steered by the steering wheel.

9. The tarpaulin folding and unfolding apparatus of claim 1, wherein the tarpaulin folding and unfolding apparatus further comprises the tarpaulin.

10. An open top container, characterized in that it comprises a tarpaulin folding and unfolding device according to any one of claims 1 to 9.