Napkin feeding mechanism of napkin folding machine

Abstract

The utility model relates to the field of feeding, in particular to a napkin feeding mechanism of a napkin folding machine, which comprises a rack, at least one stacking area is arranged in the rack, an inlet is arranged on one side of the rack of the stacking area, and an outlet is arranged on the other side of the rack of the stacking area. The feeding conveying part is used for conveying tiled napkins; the device comprises an adjustable frame with an adjustable angle; the first roll shaft and the second roll shaft are arranged in the adjustable frame, the third roll shaft and the fourth roll shaft are arranged in the rack, the position where the third roll shaft is located is a discharging end, the fourth roll shaft is located below the third roll shaft, and the plane where the central axis of the second roll shaft and the central axis of the third roll shaft are located is in a horizontal state; the conveying belts are arranged side by side; the tensioning part is arranged on the rack; and the motor is arranged on the rack, and an output shaft of the motor is fixedly connected with the end part of the third roll shaft. Through the device, the napkin feeding mechanism can be matched with various types of machines for cleaning and drying napkins.

Description

TECHNICAL FIELD

[0001] The utility model relates to a feeding field, especially a napkin feeding mechanism of napkin folding machine. BACKGROUND

[0002] Before use, napkins need to be folded and placed in front of the dining table for guests to use. Generally, the work of folding napkins is completed by manual work, but considering the manual folding method, the folding efficiency is low, therefore, in the patent with the application number CN2020201544367 and the patent name napkin folding device, a first folding part is configured to fold the napkin along a first direction for the first time, wherein the first folding part includes a first folding shaft and a first folding plate folded along the first folding shaft; a second folding part is configured to fold the napkin folded for the first time along a second direction for the second time, wherein the second folding part includes a second folding shaft and a second folding plate folded along the second folding shaft, the first direction and the second direction are opposite; and a third folding part is configured to fold the napkin folded for the second time along a third direction for the third time, wherein the third folding part includes a third folding shaft and a third folding plate folded along the third folding shaft, the third direction is perpendicular to the second direction, through the device, automatic folding of the napkin can be realized, generally, when the napkin is conveyed to the position near the device through the conveying mechanism, it is convenient for the staff to take, before the napkin is transferred to the conveying mechanism, the used napkin needs to go through the steps of cleaning and drying, because the heights of the outlets of various models of cleaning and drying machines are inconsistent, the conveying mechanism for conveying the napkin is difficult to adapt. SUMMARY

[0003] Therefore, the utility model aims at providing a napkin feeding mechanism of napkin folding machine to solve the technical problem that the conveying mechanism for conveying the napkin to the folding machine generally keeps the height unchanged, and the heights of the outlets of various models of machines for cleaning and drying the napkin are inconsistent, so that the conveying mechanism is difficult to adapt.

[0004] In order to achieve the above purpose, the utility model provides a napkin feeding mechanism of napkin folding machine, which comprises a rack, the rack is internally provided with at least one stacking area for folding napkins, the stacking area is provided with an inlet on one side of the rack, and the stacking area is provided with an outlet on the other side of the rack, and the napkin feeding mechanism further comprises:

[0005] The upper feeding conveying part is used for conveying flat napkins, the upper feeding conveying part is provided with a discharging end, the discharging end is located above the inlet, so that part of the napkin conveyed to the discharging end enters the stacking area from the inlet under the action of gravity after leaving the upper feeding conveying part; the upper feeding conveying part comprises:

[0006] An angle-adjustable adjustable frame, one side of the adjustable frame is connected with a rack;

[0007] A first roller shaft and a second roller shaft arranged in the adjustable frame and a third roller shaft and a fourth roller shaft arranged in the rack, the third roller shaft is located at a discharging end, the fourth roller shaft is located below the third roller shaft, and a plane in which a central axis of the second roller shaft and a central axis of the third roller shaft are located is in a horizontal state;

[0008] A plurality of conveying belts arranged side by side, the conveying belts pass around the first roller shaft, the second roller shaft, the third roller shaft and the fourth roller shaft;

[0009] A tensioning part arranged on the rack, for tensioning the conveying belts after the adjustable frame adjusts an included angle of the adjustable frame in a horizontal direction;

[0010] A motor arranged on the rack, an output shaft of the motor is fixedly connected with an end portion of the third roller shaft.

[0011] Further, the adjustable frame includes ear plates arranged on two sides of the rack and extension plates corresponding to the ear plates, bottom outer sides of the extension plates are provided with adjusting bolts and rotating shafts, the rotating shafts are rotatably connected with shaft holes arranged on the ear plates, the adjusting bolts are threadedly connected with screw holes arranged on the extension plates, the adjusting bolts are slidably connected with circular arc grooves arranged on the ear plates, a center of the circular arc grooves is located on a central axis of the adjusting bolt, after angle adjustment of the extension plates is completed, the extension plates are fixed on the ear plates through the adjusting bolts, the first roller shaft is arranged between the extension plates, and the second roller shaft is arranged between the ear plates.

[0012] Further, the tensioning part includes a fifth roller shaft located in the rack, the fifth roller shaft is located between the third roller shaft and the fourth roller shaft, a horizontal distance between the fourth roller shaft and the third roller shaft is greater than a 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 with the fifth roller shaft, outer sides of the end plates are provided with sliding columns, the sliding columns are slidably connected with sliding holes arranged on the rack, the sliding columns are in the shape of threaded columns, the end plates are fixed on the rack through first nuts matched with the sliding columns, the first roller shaft, the second roller shaft, the third roller shaft and the fourth roller shaft are located inside the conveying belts, and the fifth roller shaft is located outside the conveying belts.

[0013] Further, the feeding conveying part further includes:

[0014] A cross bar close to the discharging end, the cross bar is fixed in the rack and located above the conveying belts;

[0015] A plurality of pressing rods arranged side by side, one end of each of the pressing rods is fixed to the cross bar, the other end of each of the pressing rods is close to the conveying belts, and each of the pressing rods has elasticity, so that pressure is applied to the napkin when the napkin passes through a gap between the pressing rod and the conveying belt.

[0016] Further, the feeding conveying part further comprises:

[0017] A hinged rod hinged at one end to the extension plate, and provided with an end hole at the bottom of the hinged rod;

[0018] A push rod in sliding connection with the end hole, and hinged at one end to the rack, wherein the push rod is in the shape of a stud, and a second nut matched with the push rod is arranged outside the push rod.

[0019] Further, the stacking areas are provided in the rack in parallel, and the discharge end is in one-to-one correspondence with the stacking areas.

[0020] Further, the rack is provided with a plurality of partition plates for separating the stacking areas.

[0021] The napkin feeding mechanism of the napkin folding machine has the advantages that the height of the input end of the feeding mechanism can be adjusted according to the discharge height of the machine for cleaning and drying napkins, the angle of the adjustable frame in the horizontal direction is adjusted, the input end of the conveying belt is consistent with the discharge height of the machine for cleaning and drying napkins, the napkin is directly connected to the conveying belt for transmission after cleaning and drying, and the tensioning force of the conveying belt is adjusted by the tensioning part after the angle adjustment is completed, so that the stability of the conveying belt during conveying is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are only a part of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0023] Figure 1 is the isometric view of the present application Figure 1 ;

[0024] Figure 2 is the enlarged view of A in the figure Figure 1 ;

[0025] Figure 3 is the isometric view of the present application Figure 2 ;

[0026] Figure 4 is the enlarged view of B in the figure Figure 3 ;

[0027] Figure 5 is the side sectional view of the present application

[0028] Figure 6 is theFigure 5 Enlarged view at C;

[0029] Figure 7 For Figure 5 Enlarged view at D;

[0030] Figure 8 For the shaft measurement Figure 3 of the utility model;

[0031] Figure 9 For the shaft measurement Figure 4 of the utility model.

[0032] Marked as:

[0033] 1, rack; 2, stacking area; 3, stacking roller; 4, conveying belt; 5, cross rod; 6, pressing rod; 7, partition plate; 8, extension plate; 15, first roller shaft; 16, second roller shaft; 17, ear plate; 18, rotating shaft; 19, circular arc groove; 20, adjusting bolt; 21, hinged rod; 22, push rod; 23, second nut; 28, third roller shaft; 29, fourth roller shaft; 30, fifth roller shaft; 31, end plate; 32, sliding hole; 33, sliding column. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the utility model more clearly and clearly, the following will be further detailed in combination with specific embodiments.

[0035] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the utility model should be understood as the usual meaning by those skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] The first aspect of the utility model provides a napkin feeding mechanism of a napkin folding machine, such as Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 ,Figure 9 As shown, the feeding mechanism comprises a frame 1, and at least one stacking area 2 in the frame 1 for folding napkins, the stacking area 2 is provided with an entrance on one side of the frame 1 and an exit on the other side of the frame 1, and the feeding mechanism further comprises:

[0037] a feeding conveying part for conveying flat napkins, the feeding conveying part is provided with an exit end, the exit end is above the entrance, so that a part of the napkins conveyed to the exit end, after leaving the feeding conveying part, enters the stacking area 2 from the entrance under the action of gravity; the feeding conveying part comprises:

[0038] an adjustable frame with adjustable angle, one side of the adjustable frame is connected with the frame 1;

[0039] a first roller shaft 15 and a second roller shaft 16 arranged in the adjustable frame, and a third roller shaft 28 and a fourth roller shaft 29 arranged in the frame 1, the third roller shaft 28 is located at the exit end, the fourth roller shaft 29 is below the third roller shaft 28, and the central axis of the second roller shaft 16 and the central axis of the third roller shaft 28 are in a horizontal plane;

[0040] a plurality of conveying belts 4 arranged side by side, the conveying belts 4 pass around the first roller shaft 15, the second roller shaft 16, the third roller shaft 28 and the fourth roller shaft 29;

[0041] a tensioning part arranged on the frame 1, for tensioning the conveying belts 4 after the adjustable frame adjusts the included angle in the horizontal direction;

[0042] a motor arranged on the frame 1, the output shaft of the motor is fixedly connected with the end of the third roller shaft 28.

[0043] In this embodiment, the height of the input end of the feeding mechanism can be adjusted according to the discharge height of the machine for washing and drying napkins, here the angle of the adjustable frame in the horizontal direction is adjusted, so that the input end of the conveying belts 4 is consistent with the discharge height of the machine for washing and drying napkins, so that the napkins are directly connected to the conveying belts 4 for conveying after completing washing and drying, and the tensioning force of the conveying belts 4 is adjusted by the tensioning part after the angle adjustment is completed, to ensure the stability of the conveying belts 4 during conveying.

[0044] As an embodiment, as Figure 3 , Figure 4 , Figure 5As shown, the adjustable frame includes the ear plates 17 arranged on both sides of the frame 1 and the extension plates 8 corresponding to the ear plates 17, the bottom outer side of the extension plates 8 is provided with the adjusting bolt 20 and the rotating shaft 18, the rotating shaft 18 is rotationally connected with the shaft hole arranged on the ear plate 17, the adjusting bolt 20 is threadedly connected with the screw hole arranged on the extension plate 8, the adjusting bolt 20 is slidingly connected with 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 adjustment of the extension plate 8 is completed, the extension plate 8 is fixed on the ear plate 17 through the adjusting bolt 20, the first roller shaft 15 is arranged between the extension plates 8, and the second roller shaft 16 is arranged between the ear plates 17.

[0045] In the embodiment, after the extension plate 8 is fixed on the ear plate 17 through the first nut, the angle of the extension plate 8 in the horizontal direction will be determined, at this time, the conveying belt 4 can normally convey the flat napkin after the motor is started, and it needs to be noted that in actual work, the input end of the conveying belt 4 in the feeding conveying part will be close to the output end of the conveying mechanism conveying the napkin, and the conveying mechanism here can be a belt conveying device, so that the napkin can be directly conveyed to the feeding conveying part, and since the heights of such conveying mechanisms are inconsistent, a height-adjustable structure is arranged in the feeding conveying part in the device, so that the height of the input end in the feeding conveying mechanism is adjustable, so as to adapt to the heights of different conveying mechanisms, and the specific operation is that the adjusting bolt 20 is rotated, and then the first nut is loosened, so that the extension plate 8 can rotate around the rotating shaft 18, when the extension plate 8 rotates, the tensioning part is used to adjust the tension of the conveying belt 4, so as to ensure the stability of the tension of the conveying belt 4, and when the height of the top of the extension plate 8, that is, the height of the output end of the feeding conveying part, is consistent with the height of the output end of the conveying mechanism, the extension plate 8 is fixed again through the adjusting bolt 20.

[0046] Here, a structure of a tensioning part is introduced, as shown in Figure 5 、 Figure 7 The tensioning part includes the fifth roller shaft 30 located in the frame 1, the fifth roller shaft 30 is located between the third roller shaft 28 and the fourth roller shaft 29, and the horizontal distance between the fourth roller shaft 29 and the third roller shaft 28 is greater than the horizontal distance between the fifth roller shaft 30 and the third roller shaft 28, both ends of the fifth roller shaft 30 are provided with the end plate 31 rotationally connected therewith, the outer side of the end plate 31 is provided with the sliding column 33, the sliding column 33 is slidingly connected with the sliding hole 32 arranged on the frame 1, the sliding column 33 is in the shape of a threaded column, the end plate 31 is fixed on the frame 1 through the first nut matched with the sliding column 33, the first roller shaft 15, the second roller shaft 16, the third roller shaft 28 and the fourth roller shaft 29 are all located inside the conveying belt 4, and the fifth roller shaft 30 is located outside the conveying belt 4.

[0047] In the embodiment, when the extension plate 8 rotates, the length of the conveying belt 4 remains unchanged, so if the conveying belt 4 is increasingly loose, the position of the fifth roller shaft 30 can be kept unchanged first, and when the height of the top of the extension plate 8, i.e. the output end of the feeding conveying part, is consistent with the height of the output end of the conveying mechanism, the extension plate 8 is fixed again through the adjusting bolt 20, and then the position of the fifth roller shaft 30 is adjusted, and when the slackness of the conveying belt 4 is appropriate, the position of the fifth roller shaft 30 is fixed through the first nut; if the conveying belt 4 is increasingly tight, the rotating angle of the extension plate 8 and the position of the fifth roller shaft 30 can be adjusted simultaneously, and when the height of the output end of the feeding conveying part is consistent with the height of the output end of the conveying mechanism, the extension plate 8 is fixed again through the adjusting bolt 20, and the position of the fifth roller shaft 30 is finely adjusted, and when the slackness of the conveying belt 4 is appropriate, the position of the fifth roller shaft 30 is fixed through the first nut. Here, the napkins conveyed by the conveying mechanism are also in a flat and completed state.

[0048] As an implementation form, as shown in Figure 1 、 Figure 2 , the feeding conveying part further comprises:

[0049] a horizontal rod 5 close to the discharge end, the horizontal rod 5 is fixed in the rack 1, and the horizontal rod 5 is above the conveying belt 4;

[0050] a plurality of pressing rods 6 arranged side by side, one end of the pressing rod 6 is fixed to the horizontal rod 5, the other end of the pressing rod 6 is close to the conveying belt 4, and the pressing rod 6 is elastic, so that the napkin is pressed when passing through the gap between the pressing rod 6 and the conveying belt 4.

[0051] In the embodiment, the napkin passing through the pressing rod 6 is given a certain pressure by the pressing rod 6, so that when a part of the napkin falls under the action of gravity, the falling speed of the napkin can be kept controllable, and the napkin cannot produce relative displacement with the conveying belt 4, and the falling speed of the napkin is equal to the conveying speed of the conveying belt 4, so that the length of the napkin falling into the stacking area 2 can be accurately calculated when the napkin just starts to fall. It should be noted that a plurality of photoelectric sensors corresponding to the stacking area 2 are preferably arranged above the feeding conveying part, and each photoelectric sensor is located in front of the corresponding discharge end. After the napkin passes through the photoelectric sensor, the number of conveyed napkins is counted, so that the rapid folding of multiple napkins is realized, the whole folding process is accurate and efficient, and the folding efficiency can be greatly improved, so that the rapid folding of large-scale napkins is realized.

[0052] Preferably, as shown in Figure 3 、 Figure 4 、 Figure 5 , the feeding conveying part further comprises:

[0053] a hinged rod 21 hinged to one end of the extension plate 8, and the bottom of the hinged rod 21 is provided with an end hole;

[0054] 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 .

[0055] In this embodiment, 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. When the adjusting bolt 20 fixes the extension plate 8, the second nut 23 can provide additional support for the extension plate 8.

[0056] In addition, here, as Figure 1 、 Figure 3 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 napkins at the same time, which greatly improves work efficiency.

[0057] In order to help staff 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 the plurality of stacking areas 2 .

[0058] In addition, it should be noted that the stacking area 2 is used for folding napkins. The stacking area 2 may be a known structure for folding napkins (such as the prior art proposed in the background art), or the following structure:

[0059] 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;

[0060] a driving portion for driving the stacking roller 3 to move between a first position and a second position;

[0061] The fixed guide portion is used to fix the position of a portion of the napkins after the portion falls to the front side, and to guide the other portion 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 in the first position.

[0062] Here, it needs to be explained that the number of times of folding the napkin mainly depends on the selected folding style, the basic folding way is to fold the napkin once, most of them are selected to fold in half, and the device is also aimed at the basic folding way. In this embodiment, when in use, the napkin is laid flat on the feeding conveying part, and is conveyed to the discharging end through the feeding conveying part. 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 is separated from the discharging end, it enters the front side of the stacking area 2. When the length of the part of the napkin falling 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 continuing to fall is guided into the rear side by the fixed guide part. Until the napkin falls completely, the fixed guide part releases the napkin in the front side. At this time, the whole napkin will be folded and hung on the stacking roller 3. Here, one stacking roller 3 can stack multiple napkins. For example, after the first napkin is hung on the stacking roller 3 at the first position, a part of the next napkin is separated from the discharging end, and after the above process, it can be stacked on the first napkin of the stacking roller 3, and stacked on each other. Therefore, multiple napkins can be stacked on the stacking roller 3 by the above method. After stacking multiple napkins, the stacking roller 3 on which the napkin is hung is driven by the driving part to move to the second position. The worker can take out the folded napkin on the stacking roller 3 at the outlet one by one. Specifically, since multiple napkins are stacked on one stacking roller 3, the highest position of the napkin on the stacking roller 3 will form a line. The worker can easily take the napkin off the stacking roller 3 by pinching the two positions of the napkin where the line is located with both hands, and keep the napkin in a folded state. Through the device, a part of the napkin can be fixed by the fixed guide part, and another part of the napkin can be guided to the other side of the stacking roller 3 at the first position. Under the action of gravity, the napkin naturally falls, thereby ensuring the uniformity of the folded shape of the napkin after folding.

[0063] The driving part here has many optional structures, for example, a Ferris wheel type, the stacking roller 3 is installed on the outside of a ring. When the motor drives the ring to rotate, the position of the stacking roller 3 changes. Similarly, the structure of the fixed guide part can also be selected in many ways. For example, the fixed guide part can be a fixed plate and a guide plate fixed on the fixed plate. When a part of the napkin is fixed on the stacking roller 3 by the fixed plate pushed by a hydraulic cylinder, the guide plate guides another part of the napkin to fall to the other side of the stacking roller 3, thereby realizing the folding of the napkin on the stacking roller 3.

[0064] It should be understood by those of ordinary skill in the art that the discussion of any of the above embodiments is merely exemplary and is not intended to suggest that the scope of the present application (including the claims) is limited to these examples; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in detail for the sake of brevity.

[0065] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications, equivalents, improvements and the like are intended to be encompassed by the present application.

Claims

1. A napkin feeding mechanism of a napkin folding machine, comprising a frame (1) having at least one stacking area (2) for folding napkins, the stacking area (2) being provided with an inlet on one side of the frame (1) and an outlet on the other side of the frame (1), characterized in that The napkin feeding mechanism further comprises: a feeding conveying part for feeding flat napkins, the feeding conveying part is provided with a discharging end, the discharging end is located above the entrance, so that a part of the napkins conveyed to the discharging end, after leaving the feeding conveying part, enters the stacking area (2) from the entrance under the action of gravity; the feeding conveying part comprises: an angle-adjustable adjustable frame, one side of the adjustable frame is connected with the rack (1); a first roller shaft (15) and a second roller shaft (16) arranged in the adjustable frame and a third roller shaft (28) and a fourth roller shaft (29) arranged in the rack (1), the third roller shaft (28) is located at the discharging end, the fourth roller shaft (29) is located below the third roller shaft (28), the central axis of the second roller shaft (16) and the central axis of the third roller shaft (28) are located in a horizontal plane; a plurality of conveying belts (4) arranged side by side, the conveying belts (4) pass around the first roller shaft (15), the second roller shaft (16), the third roller shaft (28) and the fourth roller shaft (29); a tensioning part arranged on the rack (1), for tensioning the conveying belts (4) after the adjustable frame adjusts the included angle in the horizontal direction; a motor arranged on the rack (1), the output shaft of the motor is fixedly connected with the end of the third roller shaft (28).

2. A napkin feeding mechanism for a napkin folding machine according to claim 1, wherein The adjustable frame comprises ear plates (17) arranged on the two sides of the rack (1) and extension plates (8) corresponding to the ear plates (17), the bottom outer side of the extension plates (8) is provided with adjusting bolts (20) and rotating shafts (18), the rotating shafts (18) are rotatably connected with the shaft holes arranged on the ear plates (17), the adjusting bolts (20) are threadedly connected with the screw holes arranged on the extension plates (8), the adjusting bolts (20) are slidably connected with the circular arc grooves (19) arranged on the ear plates (17), the center of the circular arc grooves (19) is located on the central axis of the adjusting bolts (20), after the angle adjustment of the extension plates (8) is completed, the extension plates (8) are fixed on the ear plates (17) through the adjusting bolts (20), the first roller shaft (15) is arranged between the extension plates (8), and the second roller shaft (16) is arranged between the ear plates (17).

3. A napkin feeding mechanism for a napkin folding machine according to claim 2, wherein The tensioning part comprises a fifth roller shaft (30) located in the frame (1), the fifth roller shaft (30) is located between the third roller shaft (28) and the fourth roller shaft (29), and the horizontal distance between the fourth roller shaft (29) and the third roller shaft (28) is greater than the horizontal distance between the fifth roller shaft (30) and the third roller shaft (28), both ends of the fifth roller shaft (30) are provided with end plates (31) rotationally connected thereto, the outer side of the end plate (31) is provided with a sliding column (33), the sliding column (33) is in sliding connection with a sliding hole (32) provided on the frame (1), the sliding column (33) is in the shape of a threaded stud, the end plate (31) is fixed on the frame (1) by a first nut matched with the sliding column (33), the first roller shaft (15), the second roller shaft (16), the third roller shaft (28) and the fourth roller shaft (29) are located inside the conveying belt (4), and the fifth roller shaft (30) is located outside the conveying belt (4).

4. A napkin feeding mechanism for a napkin folding machine according to claim 3, wherein The feeding conveying part further comprises: 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 conveying belt (4); A plurality of pressing rods (6) arranged side by side, one end of the pressing rod (6) is fixed to the cross bar (5), the other end of the pressing rod (6) is close to the conveying belt (4), and the pressing rod (6) has elasticity, so that the napkin is pressed when passing through the gap between the pressing rod (6) and the conveying belt (4).

5. A napkin feeding mechanism for a napkin folding machine according to claim 4, wherein The feeding conveying part further comprises: A hinge rod (21) hinged at one end to the extension plate (8), the bottom of the hinge rod (21) is provided with an end hole; A push rod (22) in sliding connection with 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 threaded stud, and the outer portion of the push rod (22) is provided with a second nut (23) matched with the push rod (22).

6. A napkin feeding mechanism for a napkin folding machine according to claim 4 or 5, characterized in that The stacking area (2) has a plurality of stacking areas (2) arranged side by side in the frame (1), and the discharge end corresponds to one of the stacking areas (2).

7. A napkin feeding mechanism for a napkin folding machine according to claim 6, wherein The frame (1) is provided with a plurality of partition plates (7) for separating the plurality of stacking areas (2). The frame (1) is provided with a plurality of partition plates (7) for separating the plurality of stacking areas (2).

Images