Bucket type lifting structure combined into bucket in operation and lifting conveyor

Abstract

The bucket type lifting structure comprises a conveying belt and a conveying strip which are arranged in parallel, a part of areas between the conveying belt and the conveying strip are connected with each other, and the other part of areas between the conveying belt and the conveying strip are separated from the conveying strip; a plurality of first connecting pieces are arranged on the conveying belt at equal intervals, the conveying belt is divided into a plurality of bearing parts, a plurality of second connecting pieces are arranged on the conveying strip at equal intervals, and when the continuous first connecting pieces are in contact connection with the second connecting pieces in a one-to-one correspondence mode, the bearing parts located between the adjacent first connecting pieces are bent to form a containing bag structure. The invention further provides the lifting conveyor using the structure. According to the invention, while the advantage that a belt bucket type structure is provided with a flexible belt bucket, can adapt to the shape of materials through deformation and can load more materials is reserved, the problem that a discharge port is blocked due to lateral bending of a flexible structure during discharging of a traditional belt bucket is avoided, and the belt bucket type structure has a better practical value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vertical conveying equipment, in particular to a bucket elevator structure and a vertical conveying machine. BACKGROUND

[0002] The vertical conveying machine is one of the most common conveying equipment in the present age, which is used for conveying materials in the vertical direction, and is widely used in the mining, metallurgy, chemical industry, coal, grain and other industries. It usually involves a large number of transfer operations, and the vertical conveying machine can realize the vertical conveying of materials. Compared with horizontal conveying, the vertical conveying machine occupies less space and only needs to occupy the upper and lower space, so it can be used in workshops with limited land area.

[0003] The current vertical conveying machine is generally of a bucket structure. The conveying belt with hoppers at certain intervals is wound around the head drive wheel and the tail return wheel. The head wheel is driven to rotate by the motor, which drives the conveying belt to run and rotates the tail wheel. The hopper on the conveying belt lifts the lower material to the upper unloading position, thereby realizing the lifting of the material.

[0004] In the traditional vertical conveying machine with a bucket structure, the hopper is generally of a fixed structure. Therefore, when conveying large block materials such as freshly mined coal and ore, the hopper is difficult to accommodate more materials due to the large volume of the materials and the difficulty of close stacking. In addition, the hopper is prone to being stuck due to the mismatch between the hopper shape and the material. Therefore, a belt bucket structure appears. For example, a continuous vertical conveying machine with a belt bucket structure is disclosed in Chinese Patent Publication No. CN107380904A, which includes two parallel placed bearing belts. The adjacent sides of the two parallel placed belts are connected with continuously arranged belt bucket beams. The belt bucket beams are connected with belt buckets. The belt bucket includes a belt-shaped body, which is curved in a cross-section U shape. The two ends of the U-shaped belt bucket of the belt-shaped body are sealed by a wavy belt fixed to the U-shaped belt bucket body. The wavy belt can adapt to the deformation caused by the material or the change of direction during operation and adapt to different material shapes.

[0005] The above-mentioned application uses a flexible belt-shaped body curved in a cross-section U shape to carry materials, so it can better adapt to the deformation caused by the material or the change of direction during operation and adapt to different material shapes. However, this belt bucket structure still has some problems. When conveying materials upwards, the materials are at the bottom due to gravity. When moving to the unloading position, the belt bucket needs to be turned over by 180°. During the turning process, although the opening of the belt bucket can be turned to the downward direction, the belt bucket located at the upper side will be bent towards the side during the turning due to its flexible structure, thereby forming a shape of bent hanging on one side of the opening of the belt bucket and blocking the channel between the material and the opening of the belt bucket, which finally leads to difficulty in unloading.

[0006] To this end, a new bucket elevator structure is needed, which has flexibility with a bucket structure, can adapt to deformation due to material or redirection in operation and adapt to different material shapes, while also not affecting normal discharge. SUMMARY

[0007] In view of the deficiencies in the prior art, the present application provides a bucket elevator structure and a lifting conveyor that combine into a bucket in operation, which solves the problem of the existing bucket elevator structure in the prior art bending due to gravity when discharging, closing the channel between the material and the bucket opening, and causing difficulty in discharging.

[0008] In a first aspect, the present application provides a bucket elevator structure that combines into a bucket in operation, comprising a conveyor belt and a conveying strip arranged in parallel with each other, at least one part of the conveying belt and the conveying strip arranged in parallel with each other has a vertical height difference, and a part of the conveying belt and the conveying strip are connected to each other;

[0009] A plurality of first connecting members are arranged at equal intervals on the conveying belt, so as to uniformly separate the conveying belt into a plurality of bearing parts by the first connecting members, and a plurality of second connecting members are arranged at equal intervals on the conveying strip, the spacing between adjacent second connecting members is smaller than the spacing between adjacent first connecting members;

[0010] So that in the area where the conveying belt and the conveying strip are connected to each other, when a plurality of continuous first connecting members are in one-to-one contact with a plurality of second connecting members, the bearing parts between adjacent first connecting members are bent to form a containing bag structure; in the area where the conveying belt and the conveying strip are disconnected from each other, the conveying belt and the conveying strip are both in a tensioned state, at which time the bearing parts remain flat and do not have a bending structure.

[0011] Further, the first connecting member is a connecting rod, the connecting rod is perpendicular to the moving direction of the conveying belt, the middle part of the connecting rod is fixedly connected to the conveying belt, and the two ends of the connecting rod extend outside the edge of the conveying belt.

[0012] Further, the conveying strip is arranged side by side outside the two sides of the conveying belt, the second connecting member includes an inner side surface fixed to the conveying strip corresponding to one side of the conveying belt, the second connecting member is a semi-annular bearing seat, the diameter of the bearing seat is arranged corresponding to the connecting rod, and the opening side of the bearing seat corresponds to the moving direction of the conveying strip, so that the connecting rod is abutted and supported by the semi-enclosed bearing seat.

[0013] Further, the conveying strip is arranged side by side outside the two sides of the conveying belt, the second connecting member includes an inner side surface fixed to the conveying strip corresponding to one side of the conveying belt, the second connecting member is a semi-annular bearing seat, the diameter of the bearing seat is arranged corresponding to the connecting rod, and the opening side of the bearing seat corresponds to the moving direction of the conveying strip, so that the connecting rod is abutted and supported by the semi-enclosed bearing seat.

[0014] The second aspect of the present application provides a lifting conveyor, comprising a support and a conveying belt and a conveying strip arranged inside the support, the conveying strip comprises a feeding part, a conveying part and a discharging part arranged in sequence from bottom to top, wherein the conveying part is in a vertical or overall vertical inclined state, and the feeding part and the discharging part are both protruding towards the same side to form a bending surface.

[0015] The feeding part and the conveying part of the conveying belt corresponding to the conveying strip are arranged in close connection, i.e. the first connecting piece and the second connecting piece are in a state of mutual contact and connection, so that the conveying belt folds out of the containing bag structure, and the conveying belt and the conveying strip operate synchronously; the region of the conveying belt corresponding to the discharging part of the conveying strip protrudes towards the same side to form a bending surface, and the total length of the discharging part of the conveying belt is greater than that of the conveying strip, so that the conveying belt and the conveying strip are separated from each other in the region protruding towards the same side, and the corresponding first connecting piece and the second connecting piece are disconnected; the conveying belt and the conveying strip separated from each other restore to an integrated connection structure before entering the feeding part, i.e. the first connecting piece and the second connecting piece re-contact and connect.

[0016] Further, a feeding hopper is arranged above the bending surface of the feeding part, and a discharging hopper is arranged below the bending surface of the discharging part.

[0017] Further, a partition plate is arranged inside the conveying strip corresponding to the positions of the two sides of the conveying belt, and the partition plate is fixedly connected with the support, so that the end surfaces of the containing bag structure formed by the conveying belt are in contact with the partition plate, and the partition plate closes the two end surfaces of the containing bag structure without hindering the movement thereof.

[0018] Further, a baffle is arranged at the position where the conveying part is connected with the feeding part, the baffle is a bending structure with the bottom close to the conveying strip and the top open towards the conveying belt, the bending position of the baffle is close to the height of the position where the first connecting piece and the second connecting piece of the conveying belt and the conveying strip are connected, so that the upper region of the baffle forms a space for the conveying belt to enter.

[0019] Further, a belt driving wheel is arranged at the protruding end point of the conveying belt corresponding to the discharging part at the top.

[0020] The technical principle of the present application is that the present application separates the driving structure such as the transmission belt / transmission chain in the traditional bucket elevator structure from the conveying belt which forms the bucket by folding, forming two independent structures of the conveying belt and the conveying strip which can be connected to each other at some positions and separated from each other at other positions. In this way, in the process of feeding and transporting, the conveying belt is connected to the conveying strip for driving and is folded to form a bucket structure, thereby completing the transportation of the material; in the process of discharging, the conveying belt is separated from the conveying strip, at this time the conveying belt is no longer folded but is unfolded to be flat, and the material therein naturally separates from the transportation for discharging; the subsequent conveying belt is connected to the conveying strip again to complete the folding, thereby forming the bucket structure again, and the cycle is repeated, that is, the lifting and transportation of the material can be realized.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] 1. The present application provides a conveying belt and a conveying strip structure which are independent of each other and can be connected to each other or separated from each other during operation, when connected to each other, the conveying belt forms a bucket structure to realize material lifting, and when separated from each other, the conveying belt restores flatness to realize material unloading, thereby retaining the advantages of the flexible bucket of the bucket structure, adapting to the shape of the material through deformation, loading more materials, and at the same time, avoiding the problem that the flexible structure of the traditional bucket bends laterally to block the discharge port during discharging, and having better practical value.

[0023] 2. The conveying belt of the present application restores flatness during discharging, so that there is no space to accommodate the material, the material can be discharged better, and the problem that part of the material remains in the hopper in the traditional bucket elevator is avoided; at the same time, when the conveying belt is in a flat state, a roller brush or other structure can be used to better clean the conveying belt, thereby adapting to the transportation of different materials and avoiding the influence of residual materials on the purity of new materials. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a schematic view of the bucket elevator structure in embodiment 1 of the present application.

[0025] Figure 2 FIG. 2 is a lateral schematic view of the lifting conveyor in embodiment 2 of the present application.

[0026] Figure 3 FIG. 3 is a schematic view of the conveying belt in the present application. Figure 2 FIG. 4 is an enlarged schematic view of part A in FIG. 3.

[0027] Figure 4 FIG. 5 is an enlarged schematic view of part B in FIG. 3. Figure 2

[0028] ​In the above attached diagram: 1. Conveyor bar; 2. Connecting rod; 3. Chain; 4. Belt; 5. Feed conveyor belt; 6. Feed hopper; 7. Discharge hopper; 8. Discharge conveyor belt; 9. Baffle; 11. Bearing seat; 12. Drive wheel; 13. Rotating shaft; 14. Tensioning wheel; 21. Hollowed-out; 22. Belt drive wheel. Detailed Implementation

[0029] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Example 1:

[0031] like Figure 1 As shown in the figure, this embodiment of the invention proposes a bucket elevator structure that assembles into a bucket during operation, including a conveyor belt and a conveyor bar 1 arranged parallel to each other. At least a portion of the conveyor belt and the conveyor bar 1 are connected to each other, while a portion of the conveyor belt is detached from the conveyor bar 1. Preferably, in this embodiment, the conveyor belt adopts a flexible belt structure to achieve repeated bending and stretching; the conveyor bar 1 adopts a chain structure.

[0032] A plurality of first connecting members are evenly spaced on the conveyor belt, thereby uniformly dividing the conveyor belt into several carrying sections. A plurality of second connecting members are evenly spaced on the conveyor strip 1, with the spacing between adjacent second connecting members being smaller than the spacing between adjacent first connecting members. In this embodiment, the first connecting member is a connecting rod 2, which is perpendicular to the moving direction of the conveyor belt. The middle part of the connecting rod 2 is fixedly connected to the conveyor belt, and both ends of the connecting rod 2 extend beyond the edge of the conveyor belt. Preferably, the middle part of the connecting rod 2 is provided with a cutout 21 corresponding to its length. The cutout 21 divides the connecting rod 2 into two parallel flat rods, so that the conveyor belt can pass through the middle of the cutout 21 to connect with the connecting rod 2. The connecting rod 2 also has round holes at the opposite positions of the two flat rods, so that screws and nuts can pass through the conveyor belt to fix it.

[0033] Correspondingly, the conveyor bars 1 are arranged side by side on the outer sides of the conveyor belt, meaning the distance between the conveyor bars 1 is greater than the width of the conveyor belt. The second connector is fixed to the inner side of the conveyor bar 1 on the side corresponding to the conveyor belt. The second connector is a semi-circular support 11, the support 11 being set according to the diameter of the connecting rod 2, and the open side of the support 11 corresponding to the moving direction of the conveyor bar 1, so that the connecting rod 2 is semi-enclosed and supported by the support 11. Considering that the conveyor bar 1 adopts a chain structure in this embodiment, the support 11 is set at the rotational connection of adjacent links in the chain structure, so that the direction of the support 11 always corresponds to the moving direction of the chain structure on which it is installed. At the same time, one side of the support 11 corresponding to the chain structure is blocked by the chain structure, forming a closed end, while the other open end is used for placing the connecting rod 2.

[0034] In the area where the conveying belt and the conveying strip 1 are connected to each other, when a plurality of continuous first connecting members are connected to a plurality of second connecting members in a one-to-one correspondence, the load bearing part between adjacent first connecting members is bent to form a bag structure; in the area where the conveying belt and the conveying strip 1 are separated from each other, the conveying belt and the conveying strip 1 are both in a tensioned state, at this time, the load bearing part remains flat and does not have a bending structure. In this way, during the loading and transportation process, the conveying belt is connected to the conveying strip 1 for driving and is folded to form a belt hopper structure, thereby completing the transportation of the material; during the unloading process, the conveying belt is separated from the conveying strip 1, at this time, the conveying belt is no longer folded but is unfolded to a flat structure, and the material therein is naturally separated from the transportation for unloading; the subsequent conveying belt is connected to the conveying strip 1 to complete the folding, thereby forming a belt hopper structure for carrying the material again, and the process is repeated, that is, the lifting and transportation of the material can be realized.

[0035] In a further scheme, a plurality of groups of driving wheels 12 and a plurality of groups of tensioning wheels 14 are arranged on the conveying strip 1 in a matching manner. Considering that two conveying strips 1 are arranged side by side on both sides of the conveying belt in this embodiment, each group has two driving wheels 12 or two tensioning wheels 14. The driving wheels 12 or the tensioning wheels 14 in the same group are connected by the same shaft 13. The conveying belt is provided with a belt driving wheel 22 in the area where the conveying belt and the conveying strip 1 are separated from each other. Considering that the conveying belt has the same speed as the conveying strip 1 when the conveying belt is connected to the conveying strip 1, and the length of the conveying belt is necessarily increased when the conveying belt is unfolded to be flat, therefore, in the area where the conveying belt and the conveying strip 1 are separated from each other, the running length of the conveying belt is greater than that of the conveying strip 1, and the rotating speed of the belt driving wheel 22 is faster than that of the driving wheel 12 and the tensioning wheel 14, so as to adjust the speed difference of the conveying belt in the area where the conveying belt and the conveying strip 1 are separated from each other. The belt driving wheel 22 can be powered or passively rotated by relying on the connection with the conveying belt.

[0036] Embodiment 2:

[0037] As shown in Figure 2 The embodiment of the present application proposes a lifting conveyor, which comprises a support and a conveying belt and a conveying strip 1 arranged in the support, the conveying strip 1 comprises a feeding part, a transportation part and a discharging part arranged in sequence from bottom to top, wherein the transportation part is in a vertical state, and the feeding part and the discharging part both protrude towards the same side to form a bending surface, that is, a triangular structure. As a preferred embodiment, the conveying belt in this embodiment adopts a flexible belt structure to realize repeated bending and stretching, and the conveying strip 1 adopts a chain structure. In order to distinguish from other similar structures, the conveying belt in this embodiment is referred to as a belt 4, and the conveying strip 1 is referred to as a chain 3.

[0038] The belt 4 is closely connected with the feeding part and the conveying part of the chain 3, that is, the first connecting piece and the second connecting piece are in contact with each other, so that the belt 4 is folded to form a containing bag structure, and the belt 4 and the chain 3 are synchronously operated; the area of the belt 4 corresponding to the discharging part of the chain 3 protrudes to one side to form a bending surface, and the protruding length of the belt 4 is greater than that of the chain 3, so that an angle difference is formed between the belt 4 and the chain 3, thereby making the first connecting piece and the second connecting piece disengaged, and the belt 4 and the chain 3 are separated from each other; the belt 4 and the chain 3 are closely attached again after being separated from the discharging part, and before entering the feeding part, that is, the first connecting piece and the second connecting piece are reconnected. In the embodiment, the belt 4 is separated from the chain 3 at the discharging part, and always maintains a state of mutual independence until it is moved to the bottom end. Before entering the protruding position of the bottom feeding part, the belt 4 is reconnected to the chain 3.

[0039] Correspondingly, the top end of the discharging part of the chain 3 is provided with a driving wheel 12, and the front and rear sides of the bottom corresponding to the feeding part are respectively provided with two opposite tensioning wheels 14, and the protruding end point of the top discharging part is provided with another tensioning wheel 14. The above tensioning wheels 14 and the driving wheel 12 are located inside the chain 3. However, considering that the protruding part of the chain 3 needs to be supported and positioned, one tensioning wheel 14 is further arranged outside the connection position between the protruding area and the vertical area of the feeding part and the discharging part of the chain 3. Correspondingly, in the embodiment, the belt 4 is also provided with a belt driving wheel 22 at the protruding end point of the top discharging part.

[0040] It should be noted that inside the transmission bar, a partition plate (not shown) is further arranged at positions corresponding to the two sides of the belt 4. The partition plate is fixedly connected with the support, so that the end face positions of the two sides of the containing bag structure folded by the belt 4 are in movable contact with the partition plate, and the partition plate closes the side of the belt 4 while not hindering the movement of the belt 4. This avoids the leakage of materials from the two ends of the containing bag structure.

[0041] In addition, in the embodiment, the feeding funnel 6 is arranged above the bending surface of the feeding part, and the feeding conveying belt 5 can be correspondingly arranged above the feeding funnel 6; the discharging funnel 7 is arranged below the bending surface of the discharging part, and the discharging conveying belt 8 is arranged below the discharging funnel 7, so as to realize automatic feeding and discharging.

[0042] As Figure 3As shown, further, the conveying part is provided with a baffle 9 at a position where the conveying part is connected to the feeding part. The baffle 9 is a bent structure with the bottom close to the chain 3 and the top open toward the direction of the belt 4. The bending position of the baffle 9 is close to the position where the first connecting piece and the second connecting piece of the belt 4 and the chain 3 are connected, so that the upper area of the baffle 9 forms a space for the belt 4 to enter. When the belt 4 enters the area between the baffle and the chain 3, it is connected to the bearing seat 11 through the connecting rod 2 and is blocked by the baffle 9 to form a containing bag structure after bending, which is directed upward instead of being suspended downward due to gravity. In the embodiment, the position where the belt 4 is reconnected to the chain 3 is at the connecting position between the bottom vertical section and the bent protruding section, which is at a vertical-to-horizontal corner position. Therefore, the baffle 9 as a whole presents an arc-shaped structure protruding toward the corner, so that the belt 4 is folded upward by the baffle 9 instead of being folded downward under the action of gravity. A containing bag structure is formed toward the inner side of the belt 4, so that it can form a downward bag-type containing space after being turned over 180°.

[0043] As shown, Figure 4 In the embodiment, the belt 4 is folded inward before the chain 3 under the limitation of the top inner-side tension pulley 14 in the upper discharging part of the belt 4, while the belt 4 is unfolded for a certain area under the limitation of the belt driving wheel 22 before being folded inward, at which time the connecting rod 2 and the bearing seat 11 are naturally separated, so that the belt 4 and the chain 3 are separated to form two independent structures. The rotating speed of the belt driving wheel 22 is greater than that of the tension pulley 14, so that the moving speed of the belt 4 is faster than that of the chain 3 after being separated from each other. The belt 4 is unfolded from the folded state to the flat state, and the containing bag structure formed on the inner side of the belt 4 no longer exists, and the loaded materials naturally drop downward to realize discharging. Meanwhile, the unfolding area of the belt 4 can also be matched with a roller brush or other equipment for cleaning.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A bucket elevator structure combining in operation a bucket, characterized by: The conveying belt and the conveying strip are arranged in parallel and are connected to each other in a region with a vertical height difference, and a part of the conveying belt is separated from the conveying strip; A plurality of first connecting members are arranged on the conveying belt at equal intervals, so that the conveying belt is uniformly divided into a plurality of bearing parts by the first connecting members; a plurality of second connecting members are arranged on the conveying strip at equal intervals, and the interval between adjacent second connecting members is smaller than the interval between adjacent first connecting members; When the first connecting members and the second connecting members are connected to each other in the region where the conveying belt and the conveying strip are connected to each other, the bearing parts between adjacent first connecting members are bent to form a containing bag structure; in the region where the conveying belt and the conveying strip are separated from each other, the conveying belt and the conveying strip are in a tensioned state, and the bearing parts remain flat and do not have a bending structure.

2. A bucket elevator arrangement combining in operation buckets, according to claim 1, characterized in that: The first connecting member is a connecting rod, which is perpendicular to the moving direction of the conveying belt, and the middle part of the connecting rod is fixedly connected to the conveying belt, and the two ends of the connecting rod extend out of the edge of the conveying belt.

3. A bucket elevator arrangement combining in operation buckets, according to claim 2, characterized in that: The conveying strip is arranged in parallel on both sides of the conveying belt, and the second connecting member includes an inner side surface fixed to the conveying strip corresponding to one side of the conveying belt, the second connecting member is a semi-annular bearing seat, the diameter of the bearing seat corresponds to the diameter of the connecting rod, and the opening side of the bearing seat corresponds to the moving direction of the conveying strip, so that the connecting rod is semi-enclosed and abuts against the bearing seat.

4. The in-run combining hopper of claim 1, wherein: A driving wheel and a plurality of tensioning wheels are arranged on the conveying strip in a matching manner, and a belt driving wheel is arranged on the part of the conveying belt separated from the conveying strip.

5. A bucket elevator using the bucket elevator structure according to claim 1, characterized by: The conveying belt and the conveying strip are arranged in the bracket, the conveying belt and the conveying strip include a feeding part, a conveying part and a discharging part arranged in sequence from bottom to top, the conveying part is in a vertical state or an overall inclined state in a vertical direction, and the feeding part and the discharging part protrude towards the same side to form a bending surface; The conveying belt is closely connected to the feeding part and the conveying part of the conveying strip, that is, the first connecting member and the second connecting member are in a state of being connected to each other, so that the conveying belt is folded to form a containing bag structure, and the conveying belt and the conveying strip are synchronously operated; the region of the conveying belt corresponding to the discharging part of the conveying strip protrudes towards one side to form a bending surface, and the total length of the discharging part of the conveying belt is greater than that of the conveying strip, so that the conveying belt and the conveying strip are separated from each other in the region protruding towards the same side, and the corresponding first connecting member and the second connecting member are disconnected; the conveying belt and the conveying strip are restored to an integrated connection structure before entering the feeding part, that is, the first connecting member and the second connecting member are reconnected.

6. A power and free conveyor as claimed in claim 5 wherein: A baffle is arranged at the position where the conveying part is connected to the feeding part, the baffle is a bending structure with a bottom closely attached to the conveying strip and an open top towards the conveying belt, and the bending position of the baffle is closely attached to the position of the first connecting member and the second connecting member of the conveying belt and the conveying strip, so that the upper region of the baffle forms a space for the conveying belt to enter.

7. A power and free conveyor as claimed in claim 5 wherein: A feeding hopper is arranged above the bending surface of the feeding part, and a discharging hopper is arranged below the bending surface of the discharging part.

8. A power and free conveyor as claimed in claim 5 wherein: The transmission strip is internally provided with a baffle corresponding to the position of both sides of the transmission belt, the baffle is fixedly connected with the support, so that the end surface positions of both sides of the containing bag structure formed by the transmission belt are in active contact with the baffle, and the baffle seals the end surfaces of the containing bag structure while not hindering the movement thereof.

9. A power and free conveyor as claimed in claim 5 wherein: The transmission belt is provided with a belt driving wheel at the convex end point of the top corresponding to the discharging part.

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