Paper feeding device for producing paper cup lids

Abstract

The present invention relates to the technical field of conveying equipment, and specifically provides a paper feeding device for producing paper cup lids, comprising a frame, a support arm with a preset height is arranged on the frame, a first conveyor belt is arranged on the support arm, and the lower end of the first conveyor belt can adsorb the paper cup lids, and the first conveyor belt has a screening section and a conveying section, so that only the front paper cup lids adsorbed by the first conveyor belt can enter the output area, thereby ensuring that the paper cup lids in the output area are all in a unified direction and face up, and the paper cup lids that have not passed can return to the feeding area to continuously adjust their direction until they face up and can enter the output area, and the transportation process is continuous, which can well unify the direction of the paper cup lids.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying equipment, and in particular to a paper conveying device for producing paper cup covers. Background Art

[0002] A conveyor is a mechanical device widely used in industrial production to continuously and automatically transport materials or products from one location to another.

[0003] In the manufacturing industry, paper cups are common disposable containers in daily life, mainly used to hold hot drinks, cold drinks or other liquids. Its production process involves multiple links, including raw material selection, molding, printing, coating, and packaging. Usually, in order to keep the materials clean and hygienic, the cup lid is also used when using it. The paper cup lid is an important accessory of the paper cup, mainly used to prevent external pollution, prevent beverages from spilling, maintain the temperature of the beverage, and provide drinking convenience.

[0004] Various conveying devices are required in the production process of paper cup covers, such as a conveying device for conveying paper raw materials during the production process, and a conveying device for conveying paper cup covers after the production is completed. In the prior art, since the can bodies need to be packaged one by one with paper cup covers later, it is very important to align the paper cup covers in a uniform direction and transport them continuously and quantitatively during transportation. However, the existing conveying devices have complex structures, cumbersome processes, and cannot align the paper cup covers in a uniform direction well. Summary of the invention

[0005] Based on this, it is necessary to provide a paper feeding device for producing paper cup covers to address the problem that the paper cup covers cannot be oriented in a unified direction during transportation.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A paper feeding device for producing paper cup lids, comprising:

[0008] A frame, wherein a feeding area, a screening area and an output area are arranged on the frame, wherein the screening area is provided with a support arm of a preset height, the support arm is arranged horizontally, and a first conveyor belt is arranged on the support arm, wherein the lower end of the first conveyor belt has an adsorption force capable of adsorbing the paper cup lids from the feeding area to the output area;

[0009] The first conveyor belt has a screening section and a conveying section, the adsorption force of the screening section is smaller than the adsorption force of the conveying section, and the adsorption area of ​​the front side of the paper cup cover is larger than the adsorption area of ​​the back side of the paper cup cover;

[0010] When the first conveyor belt absorbs the back side of the paper cup cover and passes through the screening section, the paper cup cover separates from the first conveyor belt and re-enters the feeding area;

[0011] When the first conveyor belt absorbs the front side of the paper cup cover and passes through the screening section, the paper cup cover passes through the conveying section and enters the output area.

[0012] Furthermore, a plurality of first adsorption holes are provided on the first conveyor belt, a first vacuum pump and a second vacuum pump are provided on the support arm, the first vacuum pump is located in the screening section, the second vacuum pump is located in the conveying section, and the power of the first vacuum pump is less than that of the second vacuum pump.

[0013] Furthermore, the feeding area has a second conveyor belt and a stacking box, the second conveyor belt is located directly below the first conveyor belt, the upper and lower ends of the stacking box are open, the stacking box is located directly above the second conveyor belt and the distance between the stacking box and the second conveyor belt is equal to the thickness of the paper cup cover, and the stacking box is provided with a recovery box on the front side along the conveying direction of the second conveyor belt, and the recovery box is located directly below the screening area for receiving the fallen paper cup covers and placing the paper cup covers back on the second conveyor belt.

[0014] Furthermore, the stacking box and the recovery box are fixed to the frame by bolts.

[0015] Furthermore, a third conveyor belt is provided between the first conveyor belt and the second conveyor belt, and both ends of the third conveyor belt are respectively close to one end of the first conveyor belt and the second conveyor belt. The third conveyor belt can absorb the front or back side of the paper cup cover to convey the paper cup cover on the second conveyor belt to the first conveyor belt, thereby changing the orientation of the paper cup cover.

[0016] Furthermore, an arc-shaped transition surface is provided between the third conveyor belt and ends of the first conveyor belt and the second conveyor belt that are close to each other.

[0017] Furthermore, a plurality of second adsorption holes are provided on the second conveyor belt, and the plurality of second adsorption holes can adsorb the paper cup covers on the second conveyor belt.

[0018] Furthermore, a fourth conveyor belt is provided in the output area, and the fourth conveyor belt rotates in the opposite direction to the first conveyor belt, and the fourth conveyor belt can receive the paper cup lids conveyed by the first conveyor belt.

[0019] Furthermore, a fifth conveyor belt is vertically arranged at one end of the first conveyor belt close to the output area, and the fifth conveyor belt can absorb the paper cup lids conveyed by the first conveyor belt. An inclined plate is arranged on the other end of the fifth conveyor belt, and one end of the inclined plate is inclined toward the fourth conveyor belt.

[0020] Furthermore, an arc-shaped transition surface is provided at one end of the fifth conveyor belt that is close to the first conveyor belt.

[0021] The beneficial effects of the present invention are:

[0022] The present invention sets a first conveyor belt with a preset height, and the lower end of the first conveyor belt can absorb the paper cup lids. The first conveyor belt has a screening section and a conveying section, so that only the paper cup lids whose front sides are absorbed by the first conveyor belt can enter the output area, thereby ensuring that the paper cup lids in the output area are all in a unified direction and face up, and the paper cup lids that have not passed can return to the feeding area and continuously adjust their directions until they face up before entering the output area, and the transportation process is continuous, which can well unify the directions of the paper cup lids.

[0023] The present invention arranges the recovery box at the front side of the stacking box along the conveying direction of the second conveyor belt, so that the paper cup covers dropped into the recovery box can be returned to the first conveyor belt again in a short time, thus saving conveying time and improving the conveying efficiency of the paper cup covers.

[0024] The present invention provides a second adsorption hole on the second conveyor belt so that the second conveyor belt can also adsorb the paper cup cover, thereby improving the stability of conveying the paper cup cover. Furthermore, the paper cup cover is conveyed in an adsorption manner to avoid damage to the paper cup cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a paper feeding device for producing paper cup covers provided in one embodiment of the present invention;

[0026] Figure 2 A top view of a paper feeding device for producing paper cup lids provided by an embodiment of the present invention;

[0027] Figure 3 for Figure 2 A cross-sectional view along AA of a paper feeding device for producing paper cup lids provided in an embodiment.

[0028] in:

[0029] 100, frame; 110, support arm; 120, first conveyor belt; 130, screening section; 140, conveying section; 150, first adsorption hole;

[0030] 200, second conveyor belt; 210, second adsorption hole; 220, stacking box; 230, recovery box; 240, bolt; 250, third conveyor belt;

[0031] 300, fourth conveyor belt; 310, fifth conveyor belt; 320, third adsorption hole; 330, inclined plate;

[0032] 400. Arc transition surface. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] Refer to the following Figure 1-Figure 3 The paper feeding device for producing paper cup covers provided by the present invention is described below.

[0037] A paper feeding device for producing paper cup lids is suitable for conveying paper cup lids, comprising a frame 100. The frame 100 is provided with a feeding area, a screening area and an output area. The feeding area is used to stack the produced paper cup lids. The paper cup lids are irregularly piled in large quantities in the feeding area, while the screening area can unify the irregular paper cup lids in a uniform direction, for example, all the paper cup lids are output with their front side facing upward or facing downward. After the paper cup lids are uniformly oriented, they enter the output area. The output area conveys the paper cup lids to other locations in an orderly manner, so as to facilitate the subsequent processing of the paper cup lids.

[0038] The screening area of ​​the present invention is provided with a support arm 110 of a preset height (the preset height can be adjusted according to actual conditions), the support arm 110 is fixed on the frame 100, the support arm 110 has a vertical part and a horizontal part, the vertical part is fixedly connected to the frame 100, and the horizontal part is suspended, and a first conveyor belt 120 is provided on the horizontal part of the support arm 110, and the first conveyor belt 120 has the function of adsorbing paper cup lids, and the lower end surface of the first conveyor belt 120 can adsorb the paper cup lids in the stacking area, and the first conveyor belt 120 rotates to transport the paper cup lids, and the first conveyor belt 120 has a screening section 130 (the screening section 130 is Figure 3 The area between the two dotted lines in FIG. 1 ) and the conveying section 140 (the conveying section 14 is Figure 3 The area outside the two dotted lines in the figure), the two sides of the screening section 130 are the conveying sections 140, and the adsorption force of the conveying sections 140 is greater than the adsorption force of the screening section 130. The conveying section 140 of the first conveyor belt 120 can adsorb the paper cup lids with the front side facing upward and the reverse side facing upward and gradually convey them to the screening section 130. Since the area of ​​the front side of the paper cup lid adsorbed is greater than the area of ​​the reverse side (the front side of the paper cup lid is a plane, and the reverse side is a groove nested on the paper cup, so when adsorbed by the first conveyor belt 120, under the same adsorption force, the front side of the paper cup lid is adsorbed more tightly, and the adsorption force of the reverse side is weaker than that of the front side), so when the front side of the paper cup lid adsorbed upward has a greater adsorption force in the screening section 130 to overcome its own gravity, so that the front side of the paper cup lid adsorbed can enter the output area after passing through the screening section 130;

[0039] When the paper cup cover with the back side facing upward is conveyed to the screening section 130, the area of ​​the back side of the paper cup cover being adsorbed is small, and the force of adsorption of the back side of the paper cup cover is less than its own gravity, so it is separated from the screening section 130. After being separated from the screening section 130, it will fall into the feeding area and re-enter the screening area until the front side of the paper cup cover is adsorbed by the first conveyor belt 120, and then it can pass through the screening section 130 and enter the output area.

[0040] It can be understood that, through the arrangement of the above-mentioned structure, only the paper cup lids whose front sides are adsorbed by the first conveyor belt 120 can enter the output area, thereby ensuring that the paper cup lids in the output area are all in the same orientation and face up, and the paper cup lids that have not passed can return to the feeding area and continuously adjust their orientation until they face up before entering the output area, and the transportation process is continuous, which can well unify the orientation of the paper cup lids.

[0041] Specifically, the function of the first conveyor belt 120 in this embodiment to absorb the paper cup cover is realized based on the following structure:

[0042] A plurality of first adsorption holes 150 are provided on the surface of the first conveyor belt 120, and the first adsorption holes 150 are evenly distributed. A first vacuum pump (not shown in the figure) and a second vacuum pump (not shown in the figure) are provided in the support arm 110. The first vacuum pump is close to the screening section 130. When the first vacuum pump is working, it can extract air from the first adsorption holes 150 so that the first adsorption holes 150 at the screening section 130 of the first conveyor belt 120 can generate an adsorption force. The second vacuum pump is close to the conveying section 140. When the second vacuum pump is working, it can also extract air so that the first adsorption holes 150 at the conveying section 140 can also generate an adsorption force. The power of the first vacuum pump and the second vacuum pump of the present invention are different. Specifically, the power of the first vacuum pump is less than that of the second vacuum pump, so that the adsorption force of the conveying section 140 on the first conveyor belt 120 is greater than the adsorption force of the screening section 130, so that the screening section 130 of the first conveyor belt 120 can return the paper cup lids facing up to the feeding area.

[0043] It should be noted that a plurality of first vacuum pumps and a plurality of second vacuum pumps may be provided to adapt to a longer conveying section 140 , so as to avoid the phenomenon that the paper cup cover is separated from the first conveying belt 120 due to insufficient adsorption force of the conveying section 140 .

[0044] More specifically, the feeding area of ​​the present invention is provided with a second conveyor belt 200 and a material storage box 220, and the second conveyor belt 200 is located directly below the first conveyor belt 120. Figure 1 and Figure 3 As shown, both the upper and lower ends of the stacking box 220 are open, and the stacking box 220 is located above the second conveyor belt 200 and the distance from the second conveyor belt 200 is the thickness of the paper cup lids. A large number of disordered paper cup lids are piled up in the stacking box 220. When the second conveyor belt 200 rotates, the paper cup lids in the stacking box 220 can be conveyed out through the bottom of the stacking box 220. Then the second conveyor belt 200 conveys the paper cup lids to the first conveyor belt 120, and then the paper cup lids are screened through the conveyance of the first conveyor belt 120. A recovery box 230 is provided on one side of the stacking box 220. Figure 1 As shown, the recovery box 230 and the stacking box 220 are both fixedly connected to the frame 100 by bolts 240, and the recovery box 230 is located directly below the screening section 130 of the first conveyor belt 120. The recovery box 230 can collect the paper cup lids that fall off the screening section 130, and the upper and lower ends of the recovery box 230 are also open, and there is a gap with the second conveyor belt 200 that is the same as the thickness of the paper cup lids, and the recovery box 230 is specifically located on the front side of the stacking box 220 in the conveying direction of the second conveyor belt 200. The advantage of such a setting is that the paper cup lids that fall into the recovery box 230 can be quickly relocated on the first conveyor belt 120.

[0045] It should be noted that, since a large number of paper cup covers are piled up in the stacking box 220, and the distance between the lower end of the stacking box 220 and the second conveyor belt 200 is just equal to the thickness of the paper cup covers, when the paper cup covers in the area corresponding to the stacking box 220 on the second conveyor belt 200 are not in a horizontal state and are located on the second conveyor belt 200, the paper cup covers will slide relative to the second conveyor belt 200, so that when the second conveyor belt 200 rotates to the corresponding area at the bottom of the recycling box 230, there will be no paper cup covers on the conveyor belt. At this time, the number of paper cups in the recycling box 230 is small, and it is easy to be in a horizontal state, so that on the second conveyor belt 200 without paper cup covers, the paper cup covers pass through a gap equal to the thickness of the paper cup covers to detach from the recycling box 230, and are transported to the first conveyor belt 120 by the second conveyor belt 200, and continue to pass through the screening section 130 and the conveying section 140, thereby realizing the above-mentioned function, that is, the paper cup covers in the recycling box 230 can be transported back to the first conveyor belt 120 in a short time. If the recycling box 230 is set on the other side of the stacking box 220, the paper cup lids in the recycling box 230 cannot be put back on the first conveyor belt 120 in a short time. Instead, the paper cup lids in the recycling box 230 can only take their turn after all the paper cup lids in the stacking box 220 have been conveyed, which greatly wastes time and thus reduces the conveying efficiency.

[0046] It can be understood that since a large number of paper cup lids in the stacking box 220 would have a large gap during transportation (the large gap means that the paper cup plate is not in a horizontal state and moves relative to the second conveyor belt 200, resulting in a large distance between adjacent paper cup lids on the second conveyor belt 200), by setting the recovery box 230 at the front side of the stacking box 220 along the conveying direction of the second conveyor belt 200, the large gap phenomenon can be utilized to transport the paper cup lids in the recovery box 230 to the first conveyor belt 120 in advance, saving time and thus improving the transportation efficiency.

[0047] At the same time, the paper cup lids that have passed through the screening section 130 and separated from the first conveyor belt 120 are facing up when entering the recycling box 230 , so that these paper cup lids are facing up when they are adsorbed by the first conveyor belt 120 again, so that they can pass through the screening section 130 .

[0048] Specifically, in order to realize the function that the paper cup cover is facing up when it is adsorbed by the first conveyor belt 120 again, and to facilitate the second conveyor belt 200 to convey the paper cup cover to the first conveyor belt 120, a third conveyor belt 250 distributed vertically is arranged between the first conveyor belt 120 and the second conveyor belt 200. Figure 1 and Figure 3As shown, the third conveyor belt 250 is located on the vertical part of the support arm 110, and the two ends of the third conveyor belt 250 are respectively close to the first conveyor belt 120 and one end of the second conveyor belt 200, and the third conveyor belt 250 also has an adsorption function. When the third conveyor belt 250 rotates, the paper cup covers on the second conveyor belt 200 are transported to the first conveyor belt 120. Since the first conveyor belt 120 is located above the second conveyor belt 200 and the first conveyor belt 120 adsorbs the paper cup covers at the lower end, the orientation of the paper cup covers will be changed after being transported by the third conveyor belt 250.

[0049] For example, Figure 3 As shown, assuming that the paper cup cover on the second conveyor belt 200 is in a state where the front side is facing downward and the back side is facing upward, after being adsorbed by the third conveyor belt 250, the front side of the paper cup cover faces the adsorption surface of the third conveyor belt 250, and then the third conveyor belt 250 transfers the paper cup cover to the first conveyor belt 120. The paper cup cover does not fall off during the transfer process. The front side of the paper cup cover is adsorbed by the first conveyor belt 120, and the back side of the paper cup cover faces downward. Therefore, the direction of the paper cup cover is changed by the transportation of the third conveyor belt 250.

[0050] More specifically, to ensure that the paper cup lids can smoothly pass through the end points of the first conveyor belt 120, the second conveyor belt 200 and the third conveyor belt 250, arcuate transition surfaces 400 are provided at the contact positions of the two ends of the second conveyor belt 200 and one end of the first conveyor belt 120 and one end of the second conveyor belt 200, and the arcuate transition surface 400 is provided with a plurality of small holes, and a third vacuum pump (not shown in the figure) is provided in the small holes, so that the arcuate transition surface 400 also has a certain adsorption force to prevent the paper cup lids from falling off.

[0051] It should be noted that the third conveyor belt 250 of the present invention is not limited to the above-mentioned structure. For example, the third conveyor belt 250 can also be a semicircular conveyor belt, and both ends of the semicircular conveyor belt are close to the first conveyor belt 120 and one end of the second conveyor belt 200. At the same time, the structure of the arc transition surface 400 can be omitted. Of course, other structures can also be used, which are not specifically limited here.

[0052] In a further embodiment, a plurality of second adsorption holes 210 are provided on the second conveyor belt 200 of the present invention, and a fourth vacuum pump (not shown in the figure) is provided on the frame 100. When the fourth vacuum pump is working, the second adsorption holes 210 can have adsorption force, so that the second conveyor belt 200 can adsorb the paper cup lids to fix them when conveying the paper cup lids, thereby making the conveying of the paper cup lids more firm and stable.

[0053] Specifically, in the output area of ​​the present embodiment, a fourth conveyor belt 300 is provided, and the fourth conveyor belt 300 is used to transport the paper cup lids on the conveying section 140 of the first conveyor belt 120 to other areas. The rotation direction of the fourth conveyor belt 300 is opposite to that of the first conveyor belt 120. Figure 3 As shown, the first conveyor belt 120 rotates counterclockwise to drive the paper cup covers to move from left to right, while the fourth conveyor belt 300 rotates clockwise. When the paper cup covers on the first conveyor belt 120 fall onto the fourth conveyor belt 300, the fourth conveyor belt 300 also drives the paper cup covers to move from left to right. It can be understood that the paper cup covers conveyed by the first conveyor belt 120 have the same direction, so the directions of the paper cup covers falling on the fourth conveyor belt 300 are also uniform.

[0054] In order to facilitate the uniformly oriented paper cup lids on the first conveyor belt 120 to stably fall on the fourth conveyor belt 300, a fifth conveyor belt 310 distributed vertically is provided at one end of the first conveyor belt 120 close to the output area, and a plurality of third adsorption holes 320 are provided on the fifth conveyor belt 310. At the same time, the third adsorption holes 320 can also adsorb the paper cup lids, and the adsorption strength is similar to that of the third conveyor belt 250, so as to ensure that the fifth conveyor belt 310 does not separate from the fifth conveyor belt 310 when conveying the paper cup lids in the vertical direction, and in order to ensure that the paper cup lids The orientation of the cover does not change when it is transferred from the fifth conveyor belt 310 to the fourth conveyor belt 300. An inclined plate 330 is fixedly provided on the lower end of the fifth conveyor belt 310. The inclined plate 330 is inclined toward the direction of the fourth conveyor belt 300, so that the paper cup cover on the fifth conveyor belt 310 is first transferred to the inclined plate 330. The inclined plate 330 cannot absorb the paper cup cover. The paper cup cover gradually slides toward the fourth conveyor belt 300 under the action of gravity. The inclined plate 330 in this embodiment does not change the orientation of the paper cup cover, so that the back of the paper cup cover faces upward when it falls on the fourth conveyor belt 300.

[0055] It should be noted that, if the paper cup lids need to be outputted facing upward, another more inclined plate 330 can be provided below the inclined plate 330, so that the paper cup lids are flipped once before falling onto the fourth conveyor belt 300, thereby changing the orientation of the paper cup lids. Alternatively, the inclination of the inclined plate 330 of the present invention can be directly increased, so that the paper cup lids are flipped once when falling from the inclined plate 330 onto the fourth conveyor belt 300, so that the paper cup lids fall on the fourth conveyor belt 300 facing upward, thus realizing the function of outputting the paper cup lids facing upward. Of course, other structures are also possible, as long as they can perform the above functions, and are not specifically limited here.

[0056] In a further embodiment, in order to ensure a smooth transition of the paper cup covers from the first conveyor belt 120 to the fifth conveyor belt 310 and the inclined plate 330, an arc-shaped transition surface 400 is also provided at a position where the fifth conveyor belt 310 and the first conveyor belt 120 are close to each other and at a connection position between the fifth conveyor belt 310 and the inclined plate 330 to improve the smoothness of the conveying.

[0057] It should be noted that the first conveyor belt 120, the second conveyor belt 200, the third conveyor belt 250, the fourth conveyor belt 300 and the fifth conveyor belt 310 in this embodiment are driven to rotate by multiple driving motors (not shown in the figure), and the rotation speed of these conveyor belts is relatively slow, so that the paper cup lids can be transported smoothly.

[0058] The specific working process of a paper feeding device for producing paper cup covers provided by the present invention is described in combination with the above embodiments:

[0059] start up:

[0060] Start the first conveyor belt 120, the second conveyor belt 200, the third conveyor belt 250, the fourth conveyor belt 300, the fifth conveyor belt 310, the first air pump, the second air pump, the third air pump and the fourth air pump to Figure 3 As shown, the first conveyor belt 120, the second conveyor belt 200, the third conveyor belt 250 and the fifth conveyor belt 310 all rotate counterclockwise, and only the fourth conveyor belt 300 rotates clockwise.

[0061] filler:

[0062] The produced paper cup lids are conveyed into the stacking box 220. The paper cup lids piled in the stacking box 220 are conveyed by the second conveyor belt 200 under the action of the rotation of the second conveyor belt 200 and the adsorption force of the second adsorption holes 210 on the second conveyor belt 200. At this time, the paper cup lids on the second conveyor belt 200 are facing up with the front side and facing up with the back side. The paper cup lids on the second conveyor belt 200 are adsorbed by the rotating third conveyor belt 250 after passing through the arc transition surface 400. The paper cup lids on the third conveyor belt 250 are adsorbed by the first conveyor belt 120 after passing through another arc transition surface 400. The orientation of the paper cup lids that arrive at the first conveyor belt 120 from the second conveyor belt 200 changes, that is, the paper cup lids that originally faced up on the second conveyor belt 200 are changed to face up with the back side when on the first conveyor belt 120, and the paper cup lids that originally faced up with the back side of the second conveyor belt 200 are changed to face up with the front side when on the first conveyor belt 120.

[0063] When these paper cup lids adsorbed by the first conveyor belt 120 pass through the screening section 130 of the first conveyor belt 120, only the paper cup lids adsorbed on the front side can pass through the screening section 130, while the paper cup lids adsorbed on the back side fall off from the screening section 130 and enter the recycling box 230. This is because the adsorption force of the first adsorption hole 150 of the screening section 130 is relatively small, and the area adsorbed on the back side is relatively small. The paper cup lids that fall into the recycling box 230 can return to the second conveyor belt 200 and continue to be transported to the first conveyor belt 120 by the third conveyor belt 250. The orientation of the paper cup lids that fall into the recycling box 230 will change when they are on the first conveyor belt 120 for the second time. That is to say, the paper cup lids that originally fell into the recycling box 230 with the back side facing up will change their orientation to face the front side facing up when they return to the first conveyor belt 120 again, so that they can pass through the screening section 130 and be transported by the conveying section 140.

[0064] Unified orientation output:

[0065] The paper cup lids that have passed through the screening section 130 are conveyed by the conveying section 140 of the first conveyor belt 120 and are conveyed to the fifth conveyor belt 310 after passing through the arc-shaped transition surface 400. The fifth conveyor belt 310 absorbs these paper cup lids with the same orientation and conveys them to the inclined plate 330. The paper cup lids slide downward on the inclined plate 330 due to gravity and fall on the fourth conveyor belt 300. When falling, these paper cup lids are still in the same orientation. The fourth conveyor belt 300 conveys these paper cup lids with the same orientation to other locations for subsequent processing.

[0066] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A paper feeding device for producing paper cup lids, characterized in that: include: A frame, wherein a feeding area, a screening area and an output area are arranged on the frame, wherein the screening area is provided with a support arm of a preset height, the support arm is arranged horizontally, and a first conveyor belt is arranged on the support arm, wherein the lower end of the first conveyor belt has an adsorption force capable of adsorbing the paper cup lids from the feeding area to the output area; The first conveyor belt has a screening section and a conveying section, the adsorption force of the screening section is smaller than the adsorption force of the conveying section, and the adsorption area of ​​the front side of the paper cup cover is larger than the adsorption area of ​​the back side of the paper cup cover; When the first conveyor belt absorbs the back side of the paper cup cover and passes through the screening section, the paper cup cover separates from the first conveyor belt and re-enters the feeding area; When the first conveyor belt absorbs the front side of the paper cup cover and passes through the screening section, the paper cup cover passes through the conveying section and enters the output area.

2. The paper feeding device for producing paper cup lids according to claim 1, characterized in that: The first conveyor belt is provided with a plurality of first adsorption holes, the support arm is provided with a first vacuum pump and a second vacuum pump, the first vacuum pump is located in the screening section, the second vacuum pump is located in the conveying section, and the power of the first vacuum pump is less than that of the second vacuum pump.

3. The paper feeding device for producing paper cup lids according to claim 1, characterized in that: The feeding area has a second conveyor belt and a stacking box, the second conveyor belt is located directly below the first conveyor belt, the upper and lower ends of the stacking box are open, the stacking box is located directly above the second conveyor belt and the distance between the stacking box and the second conveyor belt is equal to the thickness of the paper cup cover, and the stacking box is provided with a recovery box on the front side along the conveying direction of the second conveyor belt, and the recovery box is located directly below the screening area for receiving the fallen paper cup covers and placing the paper cup covers back on the second conveyor belt.

4. The paper feeding device for producing paper cup lids according to claim 3, characterized in that: The material stacking box and the recovery box are fixed on the frame by bolts.

5. The paper feeding device for producing paper cup lids according to claim 3, characterized in that: A third conveyor belt is provided between the first conveyor belt and the second conveyor belt, and both ends of the third conveyor belt are respectively close to one end of the first conveyor belt and the second conveyor belt. The third conveyor belt can absorb the front side or the back side of the paper cup cover to convey the paper cup cover on the second conveyor belt to the first conveyor belt, thereby changing the direction of the paper cup cover.

6. The paper feeding device for producing paper cup lids according to claim 5, characterized in that: An arc-shaped transition surface is provided between the third conveyor belt and ends of the first conveyor belt and the second conveyor belt that are close to each other.

7. The paper feeding device for producing paper cup lids according to claim 3, characterized in that: The second conveyor belt is provided with a plurality of second adsorption holes, and the plurality of second adsorption holes can adsorb the paper cup covers on the second conveyor belt.

8. The paper feeding device for producing paper cup lids according to claim 1, characterized in that: A fourth conveyor belt is disposed in the output area. The fourth conveyor belt rotates in the opposite direction to the first conveyor belt. The fourth conveyor belt can receive the paper cup lids conveyed by the first conveyor belt.

9. The paper feeding device for producing paper cup lids according to claim 8, characterized in that: A fifth conveyor belt is vertically arranged at one end of the first conveyor belt close to the output area, and the fifth conveyor belt can absorb the paper cup lids conveyed by the first conveyor belt. An inclined plate is arranged on the other end of the fifth conveyor belt, and one end of the inclined plate is inclined toward the fourth conveyor belt.

10. The paper feeding device for producing paper cup lids according to claim 9, characterized in that: An arc-shaped transition surface is provided at one end of the fifth conveyor belt that is close to the first conveyor belt.

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