An envelope side flap folding apparatus

Abstract

The utility model relates to the technical field of envelope bending, specifically is a kind of envelope side edge bending equipment, including equipment frame body, the surface of first frame body and second frame body is provided with auxiliary press-folding mechanism, the surface of assembly cylinder cover and envelope body is provided with accurate adjusting mechanism, the inner wall of fixed frame and the surface of second frame body and fixed base are provided with general bending mechanism. The utility model not only makes bending equipment when using can be through adjusting the distance between first frame body and second frame body to satisfy the processing needs of different size envelope body, so that bending equipment when using can accurately control the bending position of first conveying belt to envelope body, so that bending equipment is more accurate when bending the surface of envelope body, and bending equipment when using can be assisted to press bend the bending place of the envelope body after bending, so that the bending processing effect of envelope body is better when using bending equipment.

Description

Technical Field

[0001] This utility model relates to the field of envelope bending technology, specifically to an envelope side sealing edge bending device. Background Technology

[0002] An envelope is a bag-shaped package used for mailing letters and protecting their contents. Envelopes are usually made into rectangular paper bags. Side sealing plate bending equipment is needed during the production and processing of envelopes. However, existing side sealing plate bending equipment has some shortcomings. In order to meet market needs, a new type of envelope side sealing edge bending equipment is required.

[0003] Existing bending equipment is inconvenient for users to adjust when bending the side seals of envelopes. It cannot bend side seals of envelopes of different sizes, meaning the distance between the first and second frames cannot be adjusted to accommodate different envelope sizes, reducing its applicability. Furthermore, the existing equipment lacks precise adjustment of the rotating pressure rollers, hindering accurate control of the first conveyor belt's bending position on the envelope, resulting in inaccurate bending of the envelope surface. In addition, existing bending equipment typically lacks auxiliary bending capabilities, further reducing the bending effect on the envelopes. Utility Model Content

[0004] The purpose of this utility model is to provide an envelope side sealing bending device to solve the problems mentioned in the background art, such as the inability to bend the side sealing plates of envelopes of different sizes, the inconvenience of accurately adjusting the position of the rotating pressure roller, and the lack of auxiliary bending function for envelopes.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an envelope side sealing and bending device, comprising a device frame, a first frame on one side of the device frame, a second frame on one side of the device frame, a fixed base below the second frame, a controller mounted on the surface of the device frame, a device frame mounted on the surface of the second frame, drive wheel sets on the surfaces of both the first and second frames, a first conveyor belt on the surface of the drive wheel sets, a second conveyor belt on the surface of the drive wheel sets on the surface of the second frame, a fixed frame mounted on the surfaces of the first frame and the fixed base, a fixed rod mounted on the surfaces of the first and second frames, an auxiliary pressing and bending mechanism on the surfaces of the first and second frames, multiple sets of assembly sleeves fitted onto the surface of the fixed rods by screws, a precision adjustment mechanism between the assembly sleeves and the surface of the envelope body, and a universal bending mechanism on the inner wall of the fixed frame and the surfaces of the second frame and the fixed base.

[0006] Preferably, multiple sets of second guide wheel sets are installed on the surface of the bottom position of the device frame by screws, and multiple sets of first guide wheel sets are installed on the surface of the bottom position of the equipment frame by screws. Envelope bodies are placed on the surfaces of the first conveyor belt and the second conveyor belt. The surface of the fixing rod is provided with a limiting frame for limiting the first conveyor belt and the second conveyor belt. The limiting frame is installed on the surface of the fixing rod by screws, and the surface of the limiting frame is in contact with the surfaces of the first conveyor belt and the second conveyor belt respectively.

[0007] Preferably, an envelope body is provided above the assembly sleeve, and a rotating pressure roller is provided on the surface of the envelope body. The rotating pressure roller and the surface of the envelope body rotate and cooperate with each other. The surface of the rotating pressure roller is in contact with the surfaces of the first conveyor belt and the second conveyor belt respectively. Multiple sets of guide wheel bodies are provided on the inner walls of the first frame and the second frame. The guide wheel bodies rotate and cooperate with the inner walls of the first frame and the second frame respectively. The surface of the guide wheel bodies is in contact with the surfaces of the first conveyor belt and the second conveyor belt respectively. A conveyor belt assembly is provided on the surface of the equipment frame.

[0008] Preferably, the precision adjustment mechanism includes a support frame, fastening studs, a pressure plate, and scale lines. The support frame is installed on the surface of the top position of the assembly sleeve. The envelope body and the inner wall of the support frame slide against each other. The surface of the envelope body is equipped with scale lines.

[0009] Preferably, a fastening stud is threaded onto the surface of the top position of the support frame, the bottom end of the fastening stud extends to the inner side of the support frame and is provided with a pressure plate for pressing the envelope body, and the surface of the bottom position of the pressure plate is in contact with the surface of the envelope body.

[0010] Preferably, the auxiliary pressing and bending mechanism is composed of fastening bolts, mounting blocks, mounting plates, auxiliary pressure rollers and wheel frames. Mounting plates are provided on the surfaces of the first frame and the second frame. Mounting blocks are symmetrically mounted on the surfaces of the mounting plates. The mounting blocks are connected to the first frame and the second frame by fastening bolts.

[0011] Preferably, the inner wall of the mounting plate is arrayed with multiple sets of wheel frames, and the inner wall of the wheel frames is provided with auxiliary pressure rollers for bending the folded envelopes. The auxiliary pressure rollers rotate and cooperate with the inner wall of the wheel frames, and the surfaces of the auxiliary pressure rollers are in contact with the surfaces of the first conveyor belt and the second conveyor belt, respectively.

[0012] Preferably, the universal bending mechanism consists of a servo motor, a rotating shaft, a guide groove, a holding cavity, a lead screw, and an adjusting screw. The surface of the fixed base is provided with a guide groove, which slides in cooperation with the surface of the second frame. The inner wall of the fixed frame is provided with a holding cavity, and a lead screw is provided inside the holding cavity. The lead screw rotates in cooperation with the inner wall of the holding cavity.

[0013] Preferably, a servo motor is installed on the inner wall of the fixed frame, and a rotating shaft is installed on the output end of the servo motor through a coupling. One end of the rotating shaft is fixed to the surface of the lead screw, and an adjusting screw is threaded onto the surface of the lead screw. The adjusting screw slides against the inner wall of the fixed frame, and the surface of the adjusting screw is fixed to the surface of the second frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the envelope side sealing bending device not only allows the bending device to meet the processing needs of envelope bodies of different sizes by adjusting the distance between the first frame and the second frame, making the bending device more applicable, but also allows the bending device to perform auxiliary pressing on the bending point of the bent envelope body, resulting in a better bending processing effect on the envelope body.

[0015] 1. By setting up a universal bending mechanism, the bending equipment realizes the universal bending function, so that the bending equipment can be used to meet the processing needs of envelopes of different sizes by adjusting the distance between the first frame and the second frame, making the bending equipment more applicable in use.

[0016] 2. By setting a precise adjustment mechanism, the bending equipment can accurately adjust the position of the rotating pressure roller, thereby enabling the bending equipment to precisely control the bending position of the first conveyor belt on the envelope body during use, making the bending equipment more precise when bending the surface of the envelope body;

[0017] 3. By setting up an auxiliary pressing and bending mechanism, the bending equipment realizes the function of auxiliary pressing and bending, so that the bending equipment can assist in pressing and bending the bent part of the envelope body during use, resulting in better bending processing effect of the envelope body during use. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0020] Figure 3 This is a top view enlarged cross-sectional structural schematic diagram of the present invention;

[0021] Figure 4 For the present utility model Figure 3 Enlarged structural diagram of the precision adjustment mechanism

[0022] Figure 5 For the present utility model Figure 3 Enlarged schematic diagram of the auxiliary pressing and bending mechanism.

[0023] In the diagram: 1. Equipment frame; 10. First frame; 11. Controller; 12. Device frame; 13. Second frame; 14. Fixed base; 15. Conveyor belt assembly; 16. First guide wheel assembly; 17. Drive wheel assembly; 171. First conveyor belt; 172. Second conveyor belt; 18. Second guide wheel assembly; 19. Limiting frame; 110. Fixing frame; 111. Fixing rod; 112. Guide wheel body; 113. Envelope body; 114. Rotating pressure roller; 115. Assembling sleeve; 2. Precision adjustment mechanism; 21. Support frame; 22. Fastening stud; 23. Pressure plate; 24. Scale line; 3. Auxiliary pressing and bending mechanism; 31. Fastening bolt; 32. Mounting block; 33. Mounting plate; 34. Auxiliary pressure roller; 35. Wheel frame; 4. Universal bending mechanism; 41. Servo motor; 42. Rotating shaft; 43. Guide groove; 44. Holding cavity; 45. Lead screw; 46. Adjusting screw. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. In addition, the terms "first", "second", "third", "upper", "lower", "left", "right", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of the present utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0025] The structure of the envelope side sealing and bending device provided by this utility model is as follows: Figures 1 to 3As shown, the device includes a frame 1, a first frame 10 on one side of the frame 1, and a second frame 13 on another side of the frame 1. A fixed base 14 is located below the second frame 13, and the surfaces of the second frame 13 and the fixed base 14 slide against each other. A controller 11 (e.g., LA series) is mounted on the surface of the frame 1. A device frame 12 is mounted on the surface of the second frame 13, and multiple sets of second guide wheels 18 are screwed onto the bottom of the device frame 12. The surfaces of the first frame 10 and the second frame 13... Each surface is equipped with a drive wheel assembly 17, the drive device of which is controlled by a controller 11. A first conveyor belt 171 is provided on the surface of the drive wheel assembly 17, and a second conveyor belt 172 is provided on the surface of the drive wheel assembly 17 on the surface of the second frame 13. Multiple sets of first guide wheel assemblies 16 are installed on the bottom surface of the equipment frame 1 by screws. Envelope bodies 113 are placed on the surfaces of the first conveyor belt 171 and the second conveyor belt 172. Fixing frames 110 are installed on the surfaces of the first frame 10 and the fixed base 14. The first frame 10 and the second frame 13 are connected. A fixing rod 111 is mounted on the surface of conveyor belt 13. A limiting frame 19 for limiting the movement of the first conveyor belt 171 and the second conveyor belt 172 is provided on the surface of the fixing rod 111. The limiting frame 19 is screwed onto the surface of the fixing rod 111, and the surface of the limiting frame 19 contacts the surfaces of the first conveyor belt 171 and the second conveyor belt 172 respectively. Multiple sets of assembly sleeves 115 are screwed onto the surface of the fixing rod 111. An envelope body 113 is positioned above the assembly sleeves 115. A rotating pressure roller 114 is provided on the surface of the envelope body 113. The rotating pressure roller 114 rotates and engages with the surface of the envelope body 113. The surface of the rotating pressure roller 114 contacts the surfaces of the first conveyor belt 171 and the second conveyor belt 172 respectively. Multiple sets of guide wheel bodies 112 are provided on the inner walls of the first frame 10 and the second frame 13. The guide wheel bodies 112 rotate and engage with the inner walls of the first frame 10 and the second frame 13 respectively. The surfaces of the guide wheel bodies 112 contact the surfaces of the first conveyor belt 171 and the second conveyor belt 172 respectively. A conveyor belt assembly 15 is provided on the surface of the equipment frame 1.

[0026] Furthermore, such as Figure 3 and Figure 4As shown, the surfaces of the first frame 10 and the second frame 13 are provided with auxiliary pressing and folding mechanisms 3. The auxiliary pressing and folding mechanisms 3 are composed of fastening bolts 31, mounting blocks 32, mounting plates 33, auxiliary pressing rollers 34 and wheel frames 35. The surfaces of the first frame 10 and the second frame 13 are provided with mounting plates 33. Mounting blocks 32 are symmetrically mounted on the surfaces of the mounting plates 33. The mounting blocks 32 are connected to the first frame 10 and the second frame 13 by fastening bolts 31. Multiple sets of wheel frames 35 are arrayed on the inner wall of the mounting plates 33. The inner wall of the wheel frames 35 is provided with auxiliary pressing rollers 34 for pressing and folding the envelopes. The auxiliary pressing rollers 34 and the inner walls of the wheel frames 35 rotate and cooperate with each other. The surfaces of the auxiliary pressing rollers 34 are in contact with the surfaces of the first conveyor belt 171 and the second conveyor belt 172, respectively.

[0027] In practice, the user places the mounting plate 33 on the surface of the top position of the first frame 10 and the second frame 13 respectively, and then tightens the fastening bolts 31 on the surface of the mounting block 32. Under the action of the fastening bolts 31, the mounting plate 33 is installed on the surface of the first frame 10 and the second frame 13 respectively. When the bent envelope body 113 is transported to the underside of the mounting plate 33 by the first conveyor belt 171 and the second conveyor belt 172, the envelope body 113 will drive the auxiliary pressure roller 34 to rotate on the inner wall of the wheel frame 35. Under the action of the auxiliary pressure roller 34, the bent part of the envelope body 113 on the surface of the first conveyor belt 171 and the second conveyor belt 172 can be pressed to improve the bending effect of the surface of the envelope body 113. At the same time, the auxiliary pressure roller 34 will not affect the normal conveying efficiency of the envelope body 113, so as to realize the function of auxiliary bending of the bending equipment.

[0028] Furthermore, such as Figure 3 and Figure 5 As shown, the surfaces of the assembly sleeve 115 and the envelope body 113 are provided with a precision adjustment mechanism 2. The precision adjustment mechanism 2 includes a support frame 21, a fastening stud 22, a pressure plate 23, and a scale line 24. The support frame 21 is installed on the surface at the top position of the assembly sleeve 115. The inner walls of the envelope body 113 and the support frame 21 slide against each other. The surface of the envelope body 113 is provided with a scale line 24. The surface at the top position of the support frame 21 is threadedly connected to the fastening stud 22. The bottom end of the fastening stud 22 extends to the inner side of the support frame 21 and is provided with a pressure plate 23 for pressing the envelope body 113. The surface at the bottom position of the pressure plate 23 is in contact with the surface of the envelope body 113.

[0029] During implementation, the user loosens the fastening studs 22 on the surface of the support frame 21, causing the fastening studs 22 to move the pressure plate 23 away from the surface of the envelope body 113. The user then pulls the envelope body 113 left and right, causing the envelope body 113 to move the rotating pressure roller 114. When the envelope body 113 is in the adjustment position, the user can accurately adjust the position of the envelope body 113 and the rotating pressure roller 114 by observing the scale values ​​of the scale lines 24 on the surface of the envelope body 113. After adjustment, The user then tightens the fastening studs 22 on the surface of the support frame 21, causing the fastening studs 22 to drive the pressure plate 23 to move downwards. Under the combined action of the fastening studs 22 and the pressure plate 23, the envelope body 113 is pressed against the surface of the support frame 21, thereby fixing the position of the rotating pressure roller 114. Under the action of the rotating pressure roller 114, the surfaces of the first conveyor belt 171 and the second conveyor belt 172 can be pressed to achieve the function of precise adjustment of the position of the rotating pressure roller 114 by the bending equipment.

[0030] Furthermore, such as Figure 2 and Figure 3 As shown, a universal bending mechanism 4 is provided on the inner wall of the fixed frame 110 and the surfaces of the second frame 13 and the fixed base 14. The universal bending mechanism 4 consists of a servo motor 41, a rotating shaft 42, a guide groove 43, a holding cavity 44, a lead screw 45, and an adjusting screw 46. The surface of the fixed base 14 has a guide groove 43, which slides in contact with the surface of the second frame 13. The inner wall of the fixed frame 110 has a holding cavity 44, and a lead screw 45 is provided inside the holding cavity 44. The lead screw 45 is in contact with the inner wall of the holding cavity 44. The inner wall of the fixed frame 110 is equipped with a servo motor 41, which can be of the HF series. The input end of the servo motor 41 is electrically connected to the output end of the controller 11. The output end of the servo motor 41 is equipped with a rotating shaft 42 through a coupling. One end of the rotating shaft 42 is fixed to the surface of the lead screw 45. The surface of the lead screw 45 is threaded with an adjusting screw 46. The adjusting screw 46 slides against the inner wall of the fixed frame 110. The surface of the adjusting screw 46 is fixed to the surface of the second frame 13.

[0031] During implementation, the servo motor 41 inside the control frame 110 operates, driving the rotating shaft 42 to rotate. When the rotating shaft 42 rotates, it drives the lead screw 45 to rotate inside the holding cavity 44. With the cooperation of the lead screw 45 and the adjusting screw 46, the adjusting screw 46 moves left and right on the inner wall of the frame 110. When the adjusting screw 46 moves, it drives the second frame 13 to adjust its position left and right on the surface of the fixed base 14. At this time, the guide groove 43 guides the second frame 13, making the second frame 13 more accurate when adjusting its position, so as to realize the universal bending function of the bending equipment.

[0032] Working principle: In use, first place the equipment frame 1 in the designated position, and place the envelope body 113 to be bent on the surface of the first conveyor belt 171 and the second conveyor belt 172 on the surface of the first frame 10 and the second frame 13. The user can adjust the distance between the first frame 10 and the second frame 13 according to the width of the envelope body 113. The user operates the controller 11, which controls the servo motor 41 inside the fixing frame 110 to work. Under the action of the servo motor 41, the rotating shaft 42 is driven to rotate. When the rotating shaft 42 rotates, the rotating shaft 42 drives the lead screw 45 to rotate inside the holding cavity 44. With the cooperation of the lead screw 45 and the adjusting screw 46, the adjusting screw 46 moves left and right on the inner wall of the fixed frame 110. When the adjusting screw 46 moves, it drives the second frame 13 to adjust its position left and right on the surface of the fixed base 14. At this time, the second frame 13 is guided by the guide groove 43, so that the second frame 13 is more accurate when adjusting its position, so as to realize the universal bending function of the bending equipment. This allows the bending equipment to meet the processing needs of envelope bodies 113 of different sizes by adjusting the distance between the first frame 10 and the second frame 13, making the bending equipment more versatile in use.

[0033] Subsequently, the user can precisely adjust the position of the rotating pressure roller 114 according to the bending requirements of the envelope body 113. The user loosens the fastening stud 22 on the surface of the support frame 21, causing the fastening stud 22 to move the pressure plate 23 away from the surface of the envelope body 113. The user then pulls the envelope body 113 left and right, causing the envelope body 113 to move the rotating pressure roller 114. When the envelope body 113 is in the adjusted position, the user can precisely adjust the position of the envelope body 113 and the rotating pressure roller 114 by observing the scale value of the scale line 24 on the surface of the envelope body 113. After the adjustment is completed, the user tightens the support frame 21. The fastening studs 22 on the surface cause the pressure plate 23 to move downwards. Under the combined action of the fastening studs 22 and the pressure plate 23, the envelope body 113 is pressed against the surface of the support frame 21, thereby fixing the position of the rotating pressure roller 114. Under the action of the rotating pressure roller 114, the surfaces of the first conveyor belt 171 and the second conveyor belt 172 can be pressed together, so as to realize the function of precise adjustment of the position of the rotating pressure roller 114 by the bending equipment. This allows the bending equipment to accurately control the bending position of the first conveyor belt 171 on the envelope body 113 during use, making the bending equipment more precise when bending the surface of the envelope body 113.

[0034] Subsequently, the controller 11 controls the drive wheel sets 17 on the surfaces of the first frame 10 and the second frame 13 to operate. Under the action of the drive wheel sets 17, the first conveyor belt 171 and the second conveyor belt 172 move, conveying the envelope bodies 113 placed on the surfaces of the first conveyor belt 171 and the second conveyor belt 172. At this time, the conveyor belt assembly 15 moves on the surface of the equipment frame 1 along with the movement of the envelope bodies 113. Under the combined action of the first guide wheel set 16 and the second guide wheel set 18 on the surface of the conveyor belt assembly 15, the surface of the envelope bodies 113 can be guided, so that the envelope bodies 113 are conveyed and processed. The process is less prone to displacement and has higher processing precision. When the first conveyor belt 171 and the second conveyor belt 172 are conveying, the first conveyor belt 171 and the second conveyor belt 172 drive the guide wheel body 112 to rotate on the inner wall of the first frame 10 and the second frame 13 respectively. Under the action of the guide wheel body 112, the first conveyor belt 171 and the second conveyor belt 172 are conveyed more smoothly and there will be no jamming. When the first conveyor belt 171 and the second conveyor belt 172 drive the envelope body 113 to the required position, the part to be bent on the surface of the envelope body 113 is squeezed and bent, thereby realizing bending.

[0035] Subsequently, the user places the mounting plate 33 on the surface of the top position of the first frame 10 and the second frame 13 respectively, and then tightens the fastening bolts 31 on the surface of the mounting block 32. Under the action of the fastening bolts 31, the mounting plate 33 is installed on the surface of the first frame 10 and the second frame 13 respectively. When the bent envelope body 113 is transported to the area below the mounting plate 33 by the first conveyor belt 171 and the second conveyor belt 172, the envelope body 113 will drive the auxiliary pressure roller 34 to rotate on the inner wall of the wheel frame 35. Under the action of the auxiliary pressure roller 34, it can... The auxiliary pressure roller 34 can assist in pressing the bent parts of the envelope body 113 on the surfaces of the first conveyor belt 171 and the second conveyor belt 172, so that the bending effect of the envelope body 113 is better. At the same time, the auxiliary pressure roller 34 will not affect the normal conveying efficiency of the envelope body 113, so as to realize the function of auxiliary pressing of the bending equipment. Thus, when the bending equipment is used, it can assist in pressing the bent parts of the envelope body 113, so that the bending processing effect of the bending equipment on the envelope body 113 is better, and finally the use of the bending equipment is completed.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An envelope side sealing bending device, comprising a device frame (1), characterized in that: A first frame (10) is provided on one side of the equipment frame (1), and a second frame (13) is provided on one side of the equipment frame (1). A fixed base (14) is provided below the second frame (13). A controller (11) is installed on the surface of the equipment frame (1), and a device frame (12) is installed on the surface of the second frame (13). Both the first frame (10) and the second frame (13) are provided with drive wheel sets (17). A first conveyor belt (171) is provided on the surface of the drive wheel sets (17), and a second conveyor belt (172) is provided on the surface of the drive wheel sets (17) on the surface of the second frame (13). A fixing frame (110) is installed on the surface of the first frame (10) and the fixing base (14). A fixing rod (111) is installed on the surface of the first frame (10) and the second frame (13). An auxiliary pressing and folding mechanism (3) is provided on the surface of the first frame (10) and the second frame (13). Multiple sets of assembly sleeves (115) are fitted on the surface of the fixing rod (111) by screws. A precision adjustment mechanism (2) is provided on the surface of the assembly sleeve (115) and the envelope body (113). A universal bending mechanism (4) is provided on the inner wall of the fixing frame (110) and the surface of the second frame (13) and the fixing base (14).

2. A letter fold apparatus as claimed in claim 1, wherein: Multiple sets of second guide wheel sets (18) are installed on the bottom surface of the device frame (12) by screws. Multiple sets of first guide wheel sets (16) are installed on the bottom surface of the equipment frame (1) by screws. Envelope bodies (113) are placed on the surfaces of the first conveyor belt (171) and the second conveyor belt (172). The surface of the fixing rod (111) is provided with a limiting frame (19) for limiting the first conveyor belt (171) and the second conveyor belt (172). The surface of the limiting frame (19) is installed on the surface of the fixing rod (111) by screws. The surface of the limiting frame (19) is in contact with the surfaces of the first conveyor belt (171) and the second conveyor belt (172) respectively.

3. A device for bending the side flaps of an envelope according to claim 1, characterized in that: An envelope body (113) is provided above the assembly sleeve (115). A rotating pressure roller (114) is provided on the surface of the envelope body (113). The rotating pressure roller (114) rotates and engages with the surface of the envelope body (113). The surface of the rotating pressure roller (114) contacts the surfaces of the first conveyor belt (171) and the second conveyor belt (172) respectively. Multiple sets of guide wheel bodies (112) are provided on the inner walls of the first frame (10) and the second frame (13). The guide wheel bodies (112) rotate and engage with the inner walls of the first frame (10) and the second frame (13) respectively. The surface of the guide wheel bodies (112) contacts the surfaces of the first conveyor belt (171) and the second conveyor belt (172) respectively. A conveyor belt assembly (15) is provided on the surface of the equipment frame (1).

4. The apparatus of claim 1 wherein: The precision adjustment mechanism (2) includes a support frame (21), a fastening stud (22), a pressure plate (23), and a scale line (24). The support frame (21) is installed on the surface of the top position of the assembly sleeve (115). The inner wall of the envelope body (113) and the support frame (21) slide against each other. The scale line (24) is installed on the surface of the envelope body (113).

5. An apparatus for bending the side edge of an envelope according to claim 4, characterized in that: The support frame (21) has a fastening stud (22) threadedly connected to the top surface. The bottom end of the fastening stud (22) extends to the inside of the support frame (21) and is provided with a pressure plate (23) for pressing the envelope body (113). The bottom surface of the pressure plate (23) is in contact with the surface of the envelope body (113).

6. The envelope side sealing bending device according to claim 1, characterized in that: The auxiliary pressing and bending mechanism (3) is composed of fastening bolts (31), mounting blocks (32), mounting plates (33), auxiliary pressure rollers (34) and wheel frames (35). Mounting plates (33) are provided on the surfaces of the first frame (10) and the second frame (13). Mounting blocks (32) are symmetrically mounted on the surfaces of the mounting plates (33). The mounting blocks (32) are connected to the first frame (10) and the second frame (13) by fastening bolts (31).

7. The envelope side sealing bending device according to claim 6, characterized in that: The inner wall of the mounting plate (33) is arrayed with multiple sets of wheel frames (35). The inner wall of the wheel frame (35) is provided with auxiliary pressure rollers (34) for bending the envelope after bending. The auxiliary pressure rollers (34) rotate with the inner wall of the wheel frame (35). The surface of the auxiliary pressure rollers (34) is in contact with the surfaces of the first conveyor belt (171) and the second conveyor belt (172) respectively.

8. The envelope side sealing bending device according to claim 1, characterized in that: The general bending mechanism (4) consists of a servo motor (41), a rotating shaft (42), a guide groove (43), a holding cavity (44), a lead screw (45), and an adjusting screw (46). The surface of the fixed base (14) is provided with a guide groove (43), and the guide groove (43) slides with the surface of the second frame (13). The inner wall of the fixed frame (110) is provided with a holding cavity (44), and a lead screw (45) is provided inside the holding cavity (44). The lead screw (45) rotates with the inner wall of the holding cavity (44).

9. The apparatus of claim 1 wherein: A servo motor (41) is installed on the inner wall of the fixed frame (110). The output end of the servo motor (41) is connected to a rotating shaft (42) via a coupling. One end of the rotating shaft (42) is fixed to the surface of the lead screw (45). An adjusting screw (46) is threaded onto the surface of the lead screw (45). The adjusting screw (46) slides against the inner wall of the fixed frame (110). The surface of the adjusting screw (46) is fixed to the surface of the second frame (13).

Images