Full-automatic napkin folding machine

Abstract

The invention relates to the field of folding, in particular to a full-automatic napkin folding machine which comprises a rack, at least one stacking area is arranged in the rack, an inlet is formed in the portion, on one side of the rack, of the stacking area, and an outlet is formed in the portion, on the other side of the rack, of the stacking area; the feeding conveying part is used for conveying tiled napkins, and the feeding conveying part is provided with a discharging end; the stacking rollers are located in the stacking area, and the stacking area is at least internally provided with a first position and a second position; the driving part is used for driving the stacking roller to move between a first position and a second position; and the fixed guide part is used for fixing the position of a part of the napkins after the part of the napkins falls into the front side and guiding the other part of the napkins to enter the rear side in the falling process, so that all the napkins separated from the discharging end are stacked on the stacking roller located at the first position in a folded shape. By means of the device, it can be guaranteed that the folded napkins are uniform in folding shape after being folded.

Description

Technical Field

[0001] The invention relates to the field of folding, and in particular to a full-automatic napkin folding machine. Background Art

[0002] Before use, the napkin needs to be folded and placed in front of the dining table for guests. Generally, the work of folding napkins is done manually, but considering the manual folding method, the folding efficiency is low, so in the patent with application number CN2020201544367 and patent name "Napper Folding Device", it includes: a first folding part, configured to fold the napkin in half for the first time along a first direction, wherein the first folding part includes a first folding axis and a first folding plate folded along the first folding axis; a second folding part, configured to fold the napkin folded in half for the second time along a second direction, wherein the second folding part includes a second folding axis and a second folding plate folded along the second folding axis, and the first direction and the second direction are opposite; and a third folding part, configured to fold the napkin in half for the first time along a second direction, wherein the second folding part includes a second folding axis and a second folding plate folded along the second folding axis, and the first direction and the second direction are opposite; The napkin that has been folded in half for the second time is folded in half for the third time along the third direction, wherein the third folding part includes a third folding axis and a third folding plate folded along the third folding axis, and the third direction is perpendicular to the second direction. When using the device, whether it is the first folding part, the second folding part or the third folding part, in the process of folding the napkin, it is necessary to fold one part of the napkin toward another part. In this process, a part of the napkin will be separated from the device and be in an unstable state of motion. In this way, after the napkin of this part is finally folded with the other part of the napkin, the overall requirements of the folded napkin cannot be guaranteed, such as the alignment of the various parts of the folded napkin. Therefore, how to ensure the uniformity of the folding shape during the folding of the napkin is an urgent problem to be solved. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a fully automatic napkin folding machine to solve the technical problem in the prior art that it is difficult to ensure a uniform folded shape of the napkins after folding.

[0004] Based on the above purpose, the present invention provides a fully automatic napkin folding machine, including a frame, wherein the frame has at least one stacking area, the stacking area is provided with an inlet on one side of the frame, and the stacking area is provided with an outlet on the other side of the frame, and the folding machine also includes:

[0005] A feeding conveyor for conveying flat napkins, wherein the feeding conveyor is provided with a discharge end, and the discharge end is located above the inlet, so that a portion of the napkins conveyed to the discharge end, after leaving the feeding conveyor, enters the stacking area from the inlet under the action of gravity;

[0006] At least one stacking roller is located in the stacking area, the stacking area has at least a first position and a second position; the second position is located at the exit, the side of the first position facing the second position is the front side, and the side of the first position facing away from the second position is the rear side;

[0007] a driving unit for driving the stacking roller to move between the first position and the second position;

[0008] The fixed guide part is used to fix the position of a part of the napkin after the part of the napkin falls into the front side, and guide the other part of the napkin to enter the rear side during the falling process, so that all the napkins that have left the discharge end are stacked in a folded shape on the stacking roller located at the first position.

[0009] Furthermore, there are a plurality of stacking areas, and the plurality of stacking areas are arranged side by side in the frame, and the discharging end corresponds to the stacking area one by one.

[0010] Furthermore, a plurality of partition plates are provided in the frame for separating a plurality of stacking areas.

[0011] Furthermore, the fixed guide portion includes:

[0012] A rotating roller running through the stacking area, with both ends of the rotating roller being rotatably connected to the frame;

[0013] A driving member for driving the rotating roller to rotate;

[0014] A fixed plate and a plurality of supporting rods are located in the stacking area, the top of the supporting rod is fixedly connected to the side surface of the rotating roller, the fixed plate is fixedly connected to the side surface of the supporting rod, and a raised strip is provided on the bottom edge of the fixed plate, the raised strip rotates to the front side, and during the movement in the front side, gradually approaches the stacking roller located at the first position, and forms a compression area between the stacking roller located at the first position; after a part of the napkin falls into the front side, it is located in the compression area, and the position of the part of the napkin is finally fixed by the pressure formed between the raised strip and the stacking roller;

[0015] A guide plate with a top fixed to the side surface of the fixing plate, wherein the front portion of the guide plate is used to contact the falling napkin during the gradual reduction of the width of the compression area and change the falling path of the napkin so as to guide another part of the napkin to the rear side after a part of the napkin is fixed by the raised strip.

[0016] Furthermore, the driving member includes a first telescopic cylinder located in the stacking area and a swing plate hinged to the output shaft of the first telescopic cylinder, the bottom of the first telescopic cylinder is hinged to the partition plate in the corresponding stacking area, and the swing plate is fixed to the rotating roller.

[0017] Furthermore, the driving unit includes:

[0018] At least one chain connected end to end, the end of the stacking roller is fixedly connected to one of the links in the chain; in the stacking area, the side of the partition plate is provided with a slide rail groove matching the corresponding chain;

[0019] A pushing component used to push the chain to slide in the corresponding slide rail groove.

[0020] Furthermore, there are two chains, and each chain has a chain link fixedly connected to the end corresponding to the stacking roller, there are multiple stacking rollers, and the multiple stacking rollers are evenly distributed on the chain, and when one of the stacking rollers is in the first position, the other stacking roller is in the second position.

[0021] Furthermore, the pushing component includes:

[0022] A push plate located below the driving part, the push plate is provided with at least one adjustment slot facing the driving part, side plates are provided on both sides of the push plate, guide wheels are provided on the outer sides of the side plates, the guide wheels move along the guide rails provided on the corresponding partitions, a part of the slide rail groove is a driving groove in a horizontal state, and the driving groove is parallel to the movement track of the push plate, when one of the stacking rollers moves to the first position, at least two other stacking rollers are provided on the chain located in the driving groove;

[0023] A second telescopic cylinder and a bottom plate fixed to the bottom of the stacking area, the bottom of the second telescopic cylinder is hinged to the bottom plate, and the output shaft of the second telescopic cylinder is hinged to the push plate;

[0024] A stepping pressure block with an end shaft is provided at the bottom, and the end shaft is rotatably connected to the side wall of the adjustment groove;

[0025] A fixing member and a return spring with one end fixedly connected to the fixing member, wherein the fixing member is arranged in the adjusting groove; the other end of the return spring is fixedly connected to the stepping pressure block, and the connection position of the two is located above the end shaft;

[0026] An arc-shaped groove is arranged on the top of the stepping pressing block, and the inner side wall of the arc-shaped groove is used to abut against the side surface of the stacking roller on the chain in the driving groove.

[0027] Furthermore, the feeding conveying part comprises:

[0028] An adjustable frame with adjustable angle, comprising ear plates arranged on both sides of the outside of the frame and extension plates corresponding to the ear plates, an adjusting bolt and a rotating shaft are arranged on the outside of the bottom of the extension plate, the rotating shaft is rotatably connected to the shaft hole arranged on the ear plate, the adjusting bolt is threadedly connected to the screw hole arranged on the extension plate, the adjusting bolt is slidably connected to the circular arc groove arranged on the ear plate, and the center of the circular arc groove is located on the central axis of the adjusting bolt, after the angle bar of the extension plate is adjusted, the extension plate is fixed to the ear plate by the adjusting bolt;

[0029] A first roller shaft disposed between the extension plates, a second roller shaft disposed between the ear plates, and a third roller shaft and a fourth roller shaft disposed in the frame, wherein the third roller shaft is located at the discharge end, the fourth roller shaft is located below the third roller shaft, and the planes where the central axes of the second roller shaft and the third roller shaft are located are in a horizontal state;

[0030] A fifth roller shaft is located in the frame, the fifth roller shaft is located between the third roller shaft and the fourth roller shaft, and the horizontal distance between the fourth roller shaft and the third roller shaft is greater than the horizontal distance between the fifth roller shaft and the third roller shaft, both ends of the fifth roller shaft are provided with end plates rotatably connected thereto, the outer side of the end plate is provided with a sliding column, the sliding column is slidably connected with a sliding hole provided on the frame, the sliding column is in the shape of a stud, and the end plate is fixed to the frame by a first nut matching the sliding column;

[0031] A plurality of conveyor belts arranged side by side, the conveyor belts passing around a first roller, a second roller, a third roller, a fourth roller and a fifth roller, and the first roller, the second roller, the third roller and the fourth roller are all located inside the conveyor belt, and the fifth roller is located outside the conveyor belt;

[0032] A motor is arranged on the frame, and an output shaft of the motor is fixedly connected to the end of the third roller shaft.

[0033] Furthermore, the feeding conveying part comprises:

[0034] A cross bar near the discharge end, the cross bar is fixed in the frame and is located above the conveyor belt;

[0035] A plurality of pressure rods are arranged side by side, one end of each pressure rod is fixed to the cross bar, the other end of each pressure rod is close to the conveyor belt, and the pressure rod is elastic so that when the napkin passes through the gap between the pressure rod and the conveyor belt, pressure is applied to the napkin;

[0036] A hinge rod with one end hinged to the extension plate, wherein an end hole is provided at the bottom of the hinge rod;

[0037] A push rod is slidably connected to the end hole, one end of the push rod is hinged to the frame, the push rod is in the shape of a stud, and the outer portion of the push rod is sleeved with a second nut matching the push rod.

[0038] Beneficial effects of the present invention: When using the fully automatic napkin folding machine of the present invention, the napkin is laid flat on the feeding conveyor and conveyed to the discharge end by the feeding conveyor. In addition, a stacking roller is driven to the first position by the driving unit before the napkin falls into the front side. After a part of the napkin is separated from the discharge end, it enters the front side of the stacking area through the inlet. When the length of the part of the napkin that falls into the front side is sufficient, the position of the part of the napkin in the front side is fixed by the fixing guide unit, and the part of the napkin that continues to fall is fixed by the fixing guide unit. The fixed guide part guides the napkin to the rear side until all the napkins fall down, and then the fixed guide part releases the napkin in the front side. At this time, the whole napkin will be suspended on the stacking roller in a folded state, and then the driving part drives the stacking roller on which the napkin is suspended to move to the second position, and the staff can take out the folded napkin on the stacking roller. Through this device, during the folding process, the fixed guide part can fix a part of the napkin, and after the other part of the napkin is guided to the other side of the stacking roller located at the first position, it will naturally droop under the action of gravity, thereby ensuring the uniformity of the folded shape of the napkin after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 The axonometric Figure 1 ;

[0041] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0042] Figure 3 The axonometric Figure 2 ;

[0043] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0044] Figure 5 The structure of the fixed guide part in the present invention is shown in FIG. Figure 1 ;

[0045] Figure 6 The structure of the fixed guide part in the present invention is shown in FIG. Figure 2 ;

[0046] Figure 7 for Figure 3 Enlarged view of point C in the middle;

[0047] Figure 8 is a side sectional view of the present invention;

[0048] Fig. 9 for Figure 8 The enlarged view of point D in the middle;

[0049] Fig.10 for Figure 8 Enlarged view of point E in the middle;

[0050] Fig.11 for Figure 8 The enlarged view of F in the middle;

[0051] Fig.12 It is a structural schematic diagram of the driving component in the present invention;

[0052] Fig.13 For Fig.12 Enlarged view of G in the middle;

[0053] Fig.14 The axonometric Figure 3 ;

[0054] Fig.15 The axonometric Figure 4 .

[0055] The markings in the figure are:

[0056] 1. Frame; 2. Stacking area; 3. Stacking roller; 4. Conveyor belt; 5. Crossbar; 6. Pressure bar; 7. Partition plate; 8. Extension plate; 9. Rotating roller; 10. First telescopic cylinder; 11. Swing plate; 12. Support rod; 13. Guide plate; 14. Raised strip; 15. First roller shaft; 16. Second roller shaft; 17. Ear plate; 18. Rotating shaft; 19. Arc groove; 20. Adjusting bolt; 21. Articulation rod; 22, push rod; 23, second nut; 24, chain; 25, slide rail groove; 26, bottom plate; 27, second telescopic cylinder; 28, third roller; 29, fourth roller; 30, fifth roller; 31, end plate; 32, slide hole; 33, slide column; 34, stepping pressure block; 35, push plate; 36, guide rail; 37, adjustment groove; 39, fixing piece; 40, return spring; 41, fixing plate. DETAILED DESCRIPTION

[0057] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0058] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0059] The first aspect of the present invention provides a fully automatic napkin folding machine, such as Figure 1 , Figure 3 , Figure 8 , Fig.14 , Fig.15 As shown, the folding machine includes a frame 1, the frame 1 has at least one stacking area 2, the stacking area 2 is provided with an inlet on one side of the frame 1, and the stacking area 2 is provided with an outlet on the other side of the frame 1, and the folding machine also includes:

[0060] A feeding conveyor for conveying flat napkins, the feeding conveyor being provided with a discharge end, the discharge end being located above the inlet, so that a portion of the napkins conveyed to the discharge end, after leaving the feeding conveyor, enters the stacking area 2 from the inlet under the action of gravity;

[0061] At least one stacking roller 3 is located in the stacking area 2, and the stacking area 2 has at least a first position and a second position; the second position is located at the exit, the side of the first position facing the second position is the front side, and the side of the first position facing away from the second position is the rear side;

[0062] A driving unit for driving the stacking roller 3 to move between a first position and a second position;

[0063] The fixed guide part is used to fix the position of a part of the napkins after the part falls into the front side, and guide the other part of the napkins to enter the rear side during the falling process, so that all the napkins that have left the discharge end are stacked in a folded shape on the stacking roller 3 located at the first position.

[0064] Here, it should be noted that the number of times the napkin is folded mainly depends on the selected folding style. The basic folding method is to fold the napkin once. Most people choose to fold it in half. The present device also adopts the basic folding method. In the present embodiment, when in use, the napkin is laid flat on the feeding conveyor and conveyed to the discharge end by the feeding conveyor. In addition, there will be a stacking roller 3 driven to the first position by the driving part before the napkin falls into the front side. After a part of the napkin leaves the discharge end, it enters the front side of the stacking area 2 from the entrance. When the length of the part of the napkin that falls into the front side is sufficient, the position of the part of the napkin in the front side is fixed by the fixed guide part. At this time, the part of the napkin that continues to fall is guided by the fixed guide part to the rear side. Until the napkin falls completely, the fixed guide part releases the napkin in the front side. At this time, the entire napkin will be suspended on the stacking roller 3 in a folded state. Here, one stacking roller 3 can stack multiple napkins. For example, in the first After the napkin is hung on the stacking roller 3 located at the first position, a part of the next napkin is separated from the discharge end, and after the above process, it can be stacked above the first napkin on the stacking roller 3 and stacked on each other. Therefore, multiple napkins can be stacked on the stacking roller 3 using the above method. After stacking multiple napkins, the driving unit drives the stacking roller 3 on which the napkins are hung to move to the second position, and the staff can take out the folded napkins on the stacking roller 3 in sequence at the exit. Specifically, since multiple napkins are stacked on one stacking roller 3, the highest position of the napkins on the stacking roller 3 will form a line. The staff can pinch the two positions of the napkin where the line is located with both hands to easily remove the napkin from the stacking roller 3 and keep it in a folded state. Through this device, during the folding process, a fixed guide portion can fix a part of the napkin, and guide the other part of the napkin to the other side of the stacking roller 3 located at the first position, and then the napkin naturally droops under the action of gravity, thereby ensuring the uniformity of the folded shape of the napkin after folding.

[0065] In addition, here, Figure 1 As shown, in order to improve the folding efficiency of napkins, there are several stacking areas 2, and several stacking areas 2 are arranged side by side in the frame 1, and the discharge end corresponds to the stacking area 2 one by one. In this way, after the device is started, multiple stacking areas 2 can fold the napkins at the same time, which greatly improves the work efficiency.

[0066] In order for the staff to better identify the different stacking areas 2, Figure 1 As shown, a plurality of partition plates 7 are provided in the frame 1 for separating a plurality of stacking areas 2 .

[0067] As an implementation method, Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 As shown, the fixed guide portion includes:

[0068] A rotating roller 9 that penetrates the stacking area 2, and both ends of the rotating roller 9 are rotatably connected to the frame 1;

[0069] A driving member for driving the rotating roller 9 to rotate;

[0070] A fixed plate 41 and a plurality of supporting rods 12 are located in the stacking area 2, the top of the supporting rod 12 is fixedly connected to the side surface of the rotating roller 9, the fixed plate 41 is fixedly connected to the side surface of the supporting rod 12, and a raised strip 14 is provided on the bottom edge of the fixed plate 41, the raised strip 14 rotates to the front side, and during the movement in the front side, gradually approaches the stacking roller 3 located at the first position, and forms a compression area between the stacking roller 3 located at the first position; after a part of the napkin falls into the front side, it is located in the compression area, and the position of the part of the napkin is finally fixed by the pressure formed between the raised strip 14 and the stacking roller 3;

[0071] The top of the guide plate 13 is fixed to the side surface of the fixing plate 41. The front portion of the guide plate 13 is used to contact the falling napkin and change the falling path of the napkin during the gradual reduction of the width of the compression area, so as to guide the other part of the napkin to the rear side after a part of the napkin is fixed by the raised strip 14.

[0072] In the present embodiment, the flat napkin is conveyed along the feeding conveyor. After being conveyed to the discharge end, the napkin will gradually separate from the discharge end and move downward under the action of gravity. After a portion of the napkin with a sufficient length moves to the front side, the driving member drives the rotating roller 9 to rotate. During the rotation of the rotating roller 9, on the one hand, the raised strip 14 will enter the front side and gradually approach the stacking roller 3 located at the first position, and finally fix a portion of the napkin in the compression area through the pressure between the raised strip 14 and the stacking roller 3. At the same time, the front portion of the guide plate 13 forms a certain angle with the fixed plate 41, and will contact the falling napkin in the process of gradually reducing the width of the compression area, thereby changing the falling path of this portion of the napkin, so that this portion of the napkin falls to the rear side after the raised strip 14 fixes the portion of the napkin located in the front side. After the entire napkin falls to the stacking area 2, the driving unit restores the fixed plate 41 to its original position, and the napkin will be hung and folded on the stacking roller 3.

[0073] Here we introduce a structure of a driving member, such as Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the driving member includes a first telescopic cylinder 10 located in the stacking area 2 and a swing plate 11 hinged to the output shaft of the first telescopic cylinder 10 , the bottom of the first telescopic cylinder 10 is hinged to the partition plate 7 in the corresponding stacking area 2 , and the swing plate 11 is fixed to the rotating roller 9 .

[0074] As an implementation method, Figure 8 , Fig. 9 , Fig.11 , Fig.12 , Fig.13 As shown, the driving unit includes:

[0075] At least one chain 24 connected end to end, the end of the stacking roller 3 is fixedly connected to one of the links of the chain 24; in the stacking area 2, the side of the partition plate 7 is provided with a slide rail groove 25 matching the corresponding chain 24;

[0076] A pushing component is used to push the chain 24 to slide in the corresponding slide rail groove 25.

[0077] In this embodiment, when the pushing assembly pushes the chain 24, the chain 24 can start to move in the slide rail groove 25, so that the position of the stacking roller 3 in the stacking area 2 can be changed. Here, the chain 24 passes through the first position and the second position, so that the stacking roller 3 can be moved to the first position and the second position by pushing the assembly. It is best here that there are two chains 24, and each chain 24 has a chain link fixedly connected to the end corresponding to the stacking roller 3 to ensure the stability of the stacking roller 3. In addition, there are multiple stacking rollers 3, and multiple stacking rollers 3 are evenly distributed on the chain 24, and when one of the stacking rollers 3 is in the first position, the other stacking roller 3 is in the second position, so that when one of the stacking rollers 3 is stacking napkins, the other stacking roller 3 stacked with enough napkins is just in the second position, and the staff takes off the napkins in turn.

[0078] As an implementation method, Figure 8 , Fig.12 , Fig.13 As shown, the push assembly includes:

[0079] A push plate 35 is located below the driving part, and at least one adjustment groove 37 facing the driving part is provided on the push plate 35. Side plates are provided on both sides of the push plate 35, and guide wheels are provided on the outer sides of the side plates. The guide wheels move along the guide rails 36 provided on the corresponding partitions 7. A part of the slide rail groove 25 is a driving groove in a horizontal state, and the driving groove is parallel to the movement trajectory of the push plate 35. When one of the stacking rollers 3 moves to the first position, there are at least two other stacking rollers 3 on the chain 24 located in the driving groove;

[0080] A second telescopic cylinder 27 and a bottom plate 26 fixed to the bottom of the stacking area 2, the bottom of the second telescopic cylinder 27 is hinged to the bottom plate 26, and the output shaft of the second telescopic cylinder 27 is hinged to the push plate 35;

[0081] A stepping pressing block 34 with an end shaft is provided at the bottom, and the end shaft is rotatably connected to the side wall of the adjusting slot 37;

[0082] A fixing member 39 and a return spring 40 having one end fixedly connected to the fixing member 39, wherein the fixing member 39 is disposed in the adjusting groove 37; the other end of the return spring 40 is fixedly connected to the stepping pressure block 34, and the connection position of the two is located above the end shaft;

[0083] An arc-shaped groove is provided on the top of the stepping pressing block 34, and the inner side wall of the arc-shaped groove is used to abut against the side surface of the stacking roller 3 on the chain 24 in the driving groove.

[0084] In this embodiment, when the stepping pressure block 34 is offset from the stacking roller 3 on the chain 24 in the driving groove, the reset spring 40 will cause the top of the stepping pressure block 34 to tilt upward, and at this time the arc-shaped groove will face the stacking roller 3 closest to it. When it is necessary to push the chain 24 to slide in the slide rail groove 25, the output shaft of the second telescopic cylinder 27 drives the stepping pressure block 34 to move toward the stacking roller 3, and finally the arc-shaped groove will be in close contact with the side surface of the stacking roller 3. After contact, the second telescopic cylinder 27 continues to drive, and will drive the entire chain 24 to move in the slide rail groove 25 through the stacking roller 3. When the stacking roller 3 at the first position moves to the second position, the second telescopic cylinder 27 stops driving. At this time, There are at least two stacking rollers 3 on the chain 24, and then the second telescopic cylinder 27 drives the stepping pressure block 34 to move in the direction of the stacking roller 3 located behind it, and finally the side surface of the stepping pressure block 34 will contact the side surface of the stacking roller 3. Since the position of the stacking roller 3 remains unchanged at this time, the stepping pressure block 34 can only overcome the pressure of the reset spring 40 to move into the adjusting groove 37, which can ensure that the stepping pressure block 34 passes through the stacking roller 3 smoothly, and after the stepping pressure block 34 passes through the stacking roller 3, under the action of the reset spring 40, the stepping pressure block 34 will return to its original position, and at this time the second telescopic cylinder 27 stops driving, and the arc groove will face the stacking roller 3, waiting to be used to drive the chain 24 next time.

[0085] As an implementation method, Figure 1 , Figure 3 , Figure 8 , Fig. 9 , Fig.10 As shown, the feeding conveying part includes:

[0086] An adjustable frame with adjustable angle, comprising ear plates 17 arranged on both sides of the outside of the frame 1 and an extension plate 8 corresponding to the ear plates 17, an adjusting bolt 20 and a rotating shaft 18 are arranged on the outer side of the bottom of the extension plate 8, the rotating shaft 18 is rotatably connected to the shaft hole arranged on the ear plate 17, the adjusting bolt 20 is threadedly connected to the screw hole arranged on the extension plate 8, the adjusting bolt 20 is slidably connected to the circular arc groove 19 arranged on the ear plate 17, and the center of the circular arc groove 19 is located on the central axis of the adjusting bolt 20, after the angle bar of the extension plate 8 is adjusted, the extension plate 8 is fixed to the ear plate 17 by the adjusting bolt 20;

[0087] The first roller 15 is arranged between the extension plates 8, the second roller 16 is arranged between the ear plates 17, and the third roller 28 and the fourth roller 29 are arranged in the frame 1. The third roller 28 is located at the discharge end, and the fourth roller 29 is located below the third roller 28. The planes where the central axes of the second roller 16 and the third roller 28 are located are in a horizontal state.

[0088] A fifth roller 30 is located in the frame 1, and the fifth roller 30 is located between the third roller 28 and the fourth roller 29, and the horizontal distance between the fourth roller 29 and the third roller 28 is greater than the horizontal distance between the fifth roller 30 and the third roller 28. End plates 31 rotatably connected thereto are provided at both ends of the fifth roller 30, and sliding columns 33 are provided on the outer side of the end plates 31. The sliding columns 33 are slidably connected to the sliding holes 32 provided on the frame 1, and the sliding columns 33 are in the shape of studs. The end plates 31 are fixed to the frame 1 by a first nut matching the sliding columns 33.

[0089] A plurality of conveyor belts 4 are arranged side by side, the conveyor belts 4 pass through a first roller 15, a second roller 16, a third roller 28, a fourth roller 29 and a fifth roller 30, and the first roller 15, the second roller 16, the third roller 28 and the fourth roller 29 are all located inside the conveyor belt 4, and the fifth roller 30 is located outside the conveyor belt 4;

[0090] The motor is arranged on the frame 1 , and the output shaft of the motor is fixedly connected to the end of the third roller shaft 28 .

[0091] In the present embodiment, after the extension plate 8 is fixed to the ear plate 17 by the first nut, the angle of the extension plate 8 in the horizontal direction will be determined. At this time, the conveyor belt 4 can normally convey the flat napkins after the motor is started. It should be noted that in actual work, the input end of the conveyor belt 4 in the feeding conveying part will be close to the output end of the conveying mechanism for conveying the napkins. The conveying mechanism here can be a belt conveyor device, so that the napkins can be directly conveyed to the feeding conveying part. Since the heights of such conveying mechanisms are inconsistent, a height-adjustable structure is provided in the feeding conveying part of the present device, so that the input end height of the feeding conveying mechanism is adjustable to adapt to the heights of different conveying mechanisms. The specific operation is to rotate the adjusting bolt 20 and then loosen the first nut so that the extension plate 8 can rotate around the rotating shaft 18. When the extension plate 8 rotates, due to the conveying The circumference of the belt 4 remains unchanged, so if the conveyor belt 4 becomes looser, the position of the fifth roller 30 can be kept unchanged at first, and when the top of the extension plate 8, that is, the height of the output end of the feeding conveyor is consistent with the height of the output end of the conveying mechanism, the extension plate 8 is fixed again by adjusting the bolt 20, and then the position of the fifth roller 30 is adjusted. When the looseness of the conveyor belt 4 is appropriate, the position of the fifth roller 30 is fixed by the first nut; if the conveyor belt 4 becomes tighter, the rotation angle of the extension plate 8 can be adjusted while adjusting the position of the fifth roller 30. When the height of the output end of the feeding conveyor is consistent with the height of the output end of the conveying mechanism, the extension plate 8 can be fixed again by adjusting the bolt 20, and the position of the fifth roller 30 can be finely adjusted. When the looseness of the conveyor belt 4 is appropriate, the position of the fifth roller 30 can be fixed by the first nut. Here, the napkins transported by the conveying mechanism are also laid flat.

[0092] In addition, if Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 As shown, the feeding conveying part includes:

[0093] A cross bar 5 near the discharge end, the cross bar 5 is fixed in the frame 1, and the cross bar 5 is located above the conveyor belt 4;

[0094] A plurality of pressure rods 6 are arranged side by side, one end of the pressure rod 6 is fixed to the cross bar 5, the other end of the pressure rod 6 is close to the conveyor belt 4, and the pressure rod 6 is elastic, so that when the napkin passes through the gap between the pressure rod 6 and the conveyor belt 4, pressure is applied to the napkin;

[0095] A hinge rod 21 with one end hinged to the extension plate 8, and an end hole is provided at the bottom of the hinge rod 21;

[0096] A push rod 22 is slidably connected to the end hole, one end of which is hinged to the frame 1 , the push rod 22 is in the shape of a stud, and a second nut 23 matching the push rod 22 is sleeved on the outside of the push rod 22 .

[0097] In this embodiment, a certain pressure is applied to the passing napkins under the action of the pressure rod 6, so that when a part of the napkin falls under gravity, its falling speed will remain controllable, and the napkin will not produce relative displacement between the conveyor belt 4. The falling speed of the napkin is equal to the conveying speed of the conveyor belt 4. Therefore, when the napkin just starts to fall, the length of the napkin that falls into the front side can be accurately calculated. When the length that falls into the front side is sufficient, a part of the napkin can be fixed on the stacking roller 3 by the raised strip 14 on the fixing plate 41. It should be noted that it is best to set a plurality of photoelectric sensors corresponding to the stacking area 2 above the feeding conveyor part, and each photoelectric sensor is located in front of the corresponding discharge end. After the napkin passes the photoelectric sensor, the number of conveyed napkins is counted to determine the number of napkins stacked on the stacking roller 3 in the first position, thereby realizing the rapid folding of multiple napkins, and the entire folding process is accurate and efficient, which can greatly improve the folding efficiency, thereby realizing the rapid folding of large-scale napkins. Since the extension plate 8 is fixed only by the adjusting bolt 20, the angle of the extension plate 8 may rotate slowly after a long time. Therefore, before the adjusting bolt 20 loosens the extension plate 8 and adjusts the angle of the extension plate 8, it is necessary to simultaneously rotate the second nut 23 to adjust the length of the push rod 22 extending out of the end hole. After the extension plate 8 is fixed by the adjusting bolt 20, the second nut 23 can provide additional support for the extension plate 8.

[0098] The first telescopic cylinder 10 and the second telescopic cylinder 27 here can be pneumatic cylinders or hydraulic cylinders.

[0099] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0100] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fully automatic napkin folding machine, comprising a frame (1), characterized in that: The frame (1) has at least one stacking area (2), the stacking area (2) is provided with an inlet on one side of the frame (1), and the stacking area (2) is provided with an outlet on the other side of the frame (1), and the folding machine further comprises: A feeding conveyor for conveying flat napkins, the feeding conveyor being provided with a discharge end, the discharge end being located above the inlet, so that a portion of the napkins conveyed to the discharge end, after leaving the feeding conveyor, enters the stacking area (2) from the inlet under the action of gravity; At least one stacking roller (3) is located in the stacking area (2), the stacking area (2) having at least a first position and a second position; the second position is located at the exit, the side of the first position facing the second position is the front side, and the side of the first position facing away from the second position is the rear side; A driving unit for driving the stacking roller (3) to move between the first position and the second position; The fixed guide part is used to fix the position of a part of the napkin after the part falls into the front side, and guide the other part of the napkin to enter the rear side during the falling process, so that all the napkins separated from the discharge end are stacked in a folded shape on the stacking roller (3) located at the first position.

2. A fully automatic napkin folding machine according to claim 1, characterized in that: There are a plurality of stacking areas (2), and the plurality of stacking areas (2) are arranged side by side in the frame (1), and the discharge end corresponds to the stacking area (2) one by one.

3. A fully automatic napkin folding machine according to claim 2, characterized in that: A plurality of partition plates (7) are arranged in the frame (1) for separating a plurality of stacking areas (2).

4. A fully automatic napkin folding machine according to claim 3, characterized in that: The fixed guide portion comprises: A rotating roller (9) passing through the stacking area (2), wherein both ends of the rotating roller (9) are rotatably connected to the frame (1); A driving member for driving the rotating roller (9) to rotate; A fixed plate (41) and a plurality of supporting rods (12) are located in the stacking area (2), the top of the supporting rod (12) is fixedly connected to the side surface of the rotating roller (9), the fixed plate (41) is fixedly connected to the side surface of the supporting rod (12), and a raised strip (14) is provided at the bottom edge of the fixed plate (41), the raised strip (14) rotates to the front side, and during the movement in the front side, gradually approaches the stacking roller (3) located at the first position, and forms a compression area between the raised strip (14) and the stacking roller (3) located at the first position; after a part of the napkin falls into the front side, it is located in the compression area, and the position of the part of the napkin is finally fixed by the pressure formed between the raised strip (14) and the stacking roller (3); A guide plate (13) is fixed at the top to the side surface of the fixing plate (41), and the front part of the guide plate (13) is used to contact the falling napkin during the process of the width of the compression area gradually shrinking, and change the falling path of the napkin, so as to guide the other part of the napkin to the rear side after a part of the napkin is fixed by the raised strip (14).

5. The fully automatic napkin folding machine according to claim 4, characterized in that: The driving member comprises a first telescopic cylinder (10) located in the stacking area (2) and a swing plate (11) hinged to the output shaft of the first telescopic cylinder (10); the bottom of the first telescopic cylinder (10) is hinged to the partition plate (7) in the corresponding stacking area (2); and the swing plate (11) is fixed to a rotating roller (9).

6. A fully automatic napkin folding machine according to any one of claims 3 to 5, characterized in that: The driving unit comprises: at least one chain (24) connected end to end, the end of the stacking roller (3) being fixedly connected to one of the links of the chain (24); in the stacking area (2), a side surface of the partition plate (7) is provided with a slide rail groove (25) matching the corresponding chain (24); A pushing component is used to push the chain (24) to slide in the corresponding slide rail groove (25).

7. A fully automatic napkin folding machine according to claim 6, characterized in that: The chains (24) are provided with two, and each chain (24) has a chain link fixedly connected to the end corresponding to the stacking roller (3), the stacking rollers (3) are provided with a plurality, and the plurality of stacking rollers (3) are evenly distributed on the chain (24), and when one of the stacking rollers (3) is located at a first position, the other stacking roller (3) is located at a second position.

8. The fully automatic napkin folding machine according to claim 7, characterized in that: The pushing component comprises: A push plate (35) is located below the driving part, the push plate (35) is provided with at least one adjustment groove (37) facing the driving part, side plates are provided on both sides of the push plate (35), and guide wheels are provided on the outer sides of the side plates, and the guide wheels move along the guide rails (36) provided on the corresponding partitions (7), a part of the slide rail groove (25) is a driving groove in a horizontal state, and the driving groove is parallel to the movement track of the push plate (35), when one of the stacking rollers (3) moves to the first position, at least two other stacking rollers (3) are provided on the chain (24) located in the driving groove; A second telescopic cylinder (27) and a bottom plate (26) fixed to the bottom of the stacking area (2), the bottom of the second telescopic cylinder (27) being hinged to the bottom plate (26), and the output shaft of the second telescopic cylinder (27) being hinged to the push plate (35); A stepping pressure block (34) with an end shaft is provided at the bottom, and the end shaft is rotatably connected to the side wall of the adjustment groove (37); A fixing member (39) and a return spring (40) having one end fixedly connected to the fixing member (39), wherein the fixing member (39) is arranged in the adjustment groove (37); the other end of the return spring (40) is fixedly connected to the stepping pressure block (34), and the connection position of the two is located above the end shaft; An arc-shaped groove is provided on the top of the stepping pressure block (34), and the inner side wall of the arc-shaped groove is used to abut against the side surface of the stacking roller (3) on the chain (24) in the driving groove.

9. The fully automatic napkin folding machine according to claim 8, characterized in that: The feeding conveying part comprises: An adjustable frame with adjustable angle, comprising ear plates (17) arranged on both sides of the outside of a frame (1) and an extension plate (8) corresponding to the ear plates (17), an adjusting bolt (20) and a rotating shaft (18) are arranged on the outer side of the bottom of the extension plate (8), the rotating shaft (18) is rotatably connected to the shaft hole arranged on the ear plate (17), the adjusting bolt (20) is threadedly connected to the screw hole arranged on the extension plate (8), the adjusting bolt (20) is slidably connected to the circular arc groove (19) arranged on the ear plate (17), and the center of the circular arc groove (19) is located on the central axis of the adjusting bolt (20), after the angle bar of the extension plate (8) is adjusted, the extension plate (8) is fixed to the ear plate (17) by the adjusting bolt (20); A first roller (15) disposed between the extension plates (8), a second roller (16) disposed between the ear plates (17), and a third roller (28) and a fourth roller (29) disposed in the frame (1), wherein the third roller (28) is located at a discharge end, the fourth roller (29) is located below the third roller (28), and the planes where the central axes of the second roller (16) and the third roller (28) are located are in a horizontal state; A fifth roller (30) is located in the frame (1), the fifth roller (30) is located between the third roller (28) and the fourth roller (29), and the horizontal distance between the fourth roller (29) and the third roller (28) is greater than the horizontal distance between the fifth roller (30) and the third roller (28), both ends of the fifth roller (30) are provided with end plates (31) rotatably connected thereto, the outer side of the end plate (31) is provided with a sliding column (33), the sliding column (33) is slidably connected to a sliding hole (32) provided on the frame (1), the sliding column (33) is in the shape of a stud, and the end plate (31) is fixed to the frame (1) by a first nut matching the sliding column (33); A plurality of conveyor belts (4) are arranged side by side, wherein the conveyor belts (4) pass around a first roller (15), a second roller (16), a third roller (28), a fourth roller (29) and a fifth roller (30), and the first roller (15), the second roller (16), the third roller (28) and the fourth roller (29) are all located inside the conveyor belts (4), and the fifth roller (30) is located outside the conveyor belts (4); A motor is arranged on the frame (1), wherein the output shaft of the motor is fixedly connected to the end of the third roller shaft (28).

10. The fully automatic napkin folding machine according to claim 9, characterized in that: The feeding conveying part comprises: A cross bar (5) near the discharge end, wherein the cross bar (5) is fixed in the frame (1) and the cross bar (5) is located above the conveyor belt (4); A plurality of pressure rods (6) are arranged side by side, one end of each pressure rod (6) is fixed to the cross bar (5), the other end of each pressure rod (6) is close to the conveyor belt (4), and the pressure rod (6) is elastic so that when the napkin passes through the gap between the pressure rod (6) and the conveyor belt (4), pressure is applied to the napkin; A hinge rod (21) with one end hinged to the extension plate (8), wherein an end hole is provided at the bottom of the hinge rod (21); A push rod (22) is slidably connected to the end hole, one end of the push rod (22) is hinged to the frame (1), the push rod (22) is in the shape of a stud, and the outside of the push rod (22) is sleeved with a second nut (23) matching the push rod (22).

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