Surface embossing device for tissue paper production

Abstract

This invention discloses a surface embossing device for the production of tissue paper, including an embossing roller, embossing blocks, and an embossing block telescopic assembly for driving the embossing blocks to move radially along the embossing roller. The embossing roller includes a main embossing roller and a secondary embossing roller detachably connected to the main embossing roller. One side of the main embossing roller is axially provided with an mounting port for the embossing block telescopic assembly and the embossing blocks to be inserted. The outer wall of the main embossing roller is provided with multiple sets of embossing block extension slots along its circumference for the embossing blocks to extend out. The embossing block telescopic assembly includes multiple sets of embossing block mounting plates, each set of mounting plates corresponding to each set of embossing block extension slots. Multiple sets of embossing blocks are provided on each set of mounting plates. Each set of mounting plates is provided with a driving component for driving the multiple sets of embossing blocks to move. This invention can adjust the position of the embossing blocks on the embossing roller according to the requirements of various tissue paper embossing spacings, avoiding the need to manufacture multiple embossing rollers according to the embossing spacing requirements, and effectively reducing manufacturing costs.

Description

Technical Field

[0001] This invention relates to the field of tissue paper production technology, specifically to a surface embossing device for the production of household tissue paper. Background Technology

[0002] Currently available tissues and toilet paper mainly include: roll paper, boxed facial tissues, and soft-pack pull-out facial tissues. Tissues come in two, three, four, or more layers. To meet personalized consumer needs, many tissues on the market are embossed.

[0003] CN203221676U discloses a tissue embossing device, including a first embossing roller and a second embossing roller. Embossing protrusions are provided on the outer circumferential surfaces of both the first and second embossing rollers. The arrangement of the embossing protrusions on the first and second embossing rollers is consistent with that on the second embossing roller. The first and second embossing rollers are driven by the same servo motor. During embossing, the embossing protrusions on the first and second embossing rollers are pressed one-to-one onto the upper and lower surfaces of the tissue paper. However, the arrangement of the embossing protrusions on the embossing rollers is fixed. When the embossing position on the tissue paper needs to be changed, the embossing rollers must be replaced. This is not only cumbersome to replace, but also requires the manufacture of multiple embossing rollers according to the embossing position, increasing manufacturing costs. Summary of the Invention

[0004] The purpose of this invention is to provide a surface embossing device for the production of tissue paper, so as to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a surface embossing device for the production of tissue paper, comprising an embossing roller, an embossing block, and an embossing block telescopic assembly for driving the embossing block to move radially along the embossing roller. The embossing roller comprises a main embossing roller and a secondary embossing roller detachably connected to the main embossing roller. One side of the main embossing roller is axially provided with an installation port for the embossing block telescopic assembly and the embossing block to be inserted. The outer wall of the main embossing roller is provided with multiple sets of embossing block extension slots along its circumference. The embossing block telescopic assembly comprises multiple sets of embossing block mounting plates, each set of embossing block mounting plates being provided with each set of embossing block extension slots. Multiple sets of embossing blocks are provided on each set of embossing block mounting plates, and each set of embossing block mounting plates is provided with a driving component for driving the multiple sets of embossing blocks to move.

[0006] Preferably, the main embossing roller has a cavity inside for placing the embossing block telescopic assembly. The embossing block telescopic assembly includes base blocks symmetrically arranged on both sides and a main shaft rotatably connected between the two base blocks. The embossing block telescopic assembly also includes a sleeve threaded onto the main shaft and a connecting rod connecting the sleeve and the embossing block mounting plate. One end of the connecting rod is rotatably connected to the sleeve, and the other end is rotatably connected to the embossing block mounting plate.

[0007] Preferably, the sleeve and the connecting rod are symmetrically arranged on both sides of the main shaft length direction, and the two end faces of the embossed block mounting plate in the length direction are fitted to the inner wall of the expansion groove.

[0008] Preferably, the embossed block mounting plate is provided with multiple sets of mounting grooves along the width direction. Each set of embossed blocks is provided with a sliding plate that is embedded in a set of mounting grooves. The sliding plate of each set of embossed blocks is arranged in the same order of mounting grooves corresponding to the embossed blocks. The driving component includes a lead screw that is rotatably arranged at each set of mounting grooves. The lead screw passes through the sliding plate in the corresponding mounting groove and forms a threaded connection with the sliding plate.

[0009] Preferably, one side of the embossed block mounting plate is provided with a scale, and the inner wall of the embossed block extension groove is also provided with a scale. Multiple sets of filling blocks are slidably arranged in the embossed block extension groove, and the filling blocks and the multiple sets of embossed blocks on the embossed block mounting plate fill the embossed block extension groove.

[0010] Preferably, the main embossing roller has an annular groove on one side, the side of the embossing block extending out of the groove is connected to the annular groove, the auxiliary embossing roller is connected to the main embossing roller by a threaded connection with the outer wall of the annular groove, and a limiting member is also connected between the auxiliary embossing roller and the main embossing roller to prevent mutual rotation.

[0011] Preferably, the limiting component includes a locking disc and a locking rod. One end of the locking rod is cylindrical and rotatably connected to the locking disc, while the other end is square. The auxiliary embossing roller is provided with a threaded groove for threaded connection of the locking disc and a first square groove for the square end of the locking rod to be inserted. One side of the base block is provided with a second square groove for the square end of the locking rod to be inserted.

[0012] Preferably, the spindle has an internal hexagonal groove on the side near the second square groove, and the internal hexagonal groove is connected to the second square groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] This invention allows the mounting plate to move radially along the embossing roller by rotating the main shaft, thereby moving the embossing blocks to the surface of the embossing roller. By setting multiple sets of lead screws on the mounting plate, each set of embossing blocks can be driven to move to the required position on the mounting plate. This eliminates the need to manufacture multiple specifications of embossing rollers and replace embossing rollers due to changes in the embossing spacing of tissue paper, effectively reducing manufacturing and labor costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0017] Figure 2 This is an exploded view of the main embossing roller, the auxiliary embossing roller, and the embossing block telescopic assembly in this embodiment.

[0018] Figure 3 This is a schematic diagram of the overall structure of the embossed block telescopic assembly in this embodiment;

[0019] Figure 4 This is an exploded view of the embossing roller in this embodiment;

[0020] Figure 5 This is a cross-sectional view of the main shaft entering the embossing roller in this embodiment;

[0021] Figure 6 yes Figure 5 An enlarged schematic diagram of part A in the middle.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Embossing roller; 101. Main embossing roller; 102. Secondary embossing roller; 2. Rotating shaft; 3. Embossing block; 301. Pattern protrusion; 4. Embossing block telescopic assembly; 401. Embossing block mounting plate; 402. Base block; 403. Main shaft; 404. Sleeve; 405. Connecting rod; 5. Mounting port; 6. Embossing block extension groove; 7. Bayonet; 8. Annular groove; 9. Mounting groove; 10. Slide plate; 11. Lead screw; 12. Scale; 13. Filler block; 14. Extension; 15. Limiting groove; 16. Limiting plate; 17. Limiting component; 171. Locking disc; 172. Locking rod; 18. First square groove; 19. Second square groove; 20. Threaded groove; 21. Internal hexagonal groove; 22. Second internal hexagonal groove. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-6 This invention provides a technical solution: a surface embossing device for the production of tissue paper, including an embossing roller 1, embossing blocks 3, and an embossing block telescopic assembly 4 for driving the embossing blocks 3 to move radially along the embossing roller 1. The embossing roller 1 includes a main embossing roller 101 and a secondary embossing roller 102 detachably connected to the main embossing roller 101. One side of the main embossing roller 101 is axially provided with an installation port 5 for the embossing block telescopic assembly 4 and the embossing blocks 3 to be inserted. The outer wall of the main embossing roller 101 is provided with multiple sets of embossing block extension slots 6 for the embossing blocks 3 to extend out. The embossing block telescopic assembly 4 includes multiple sets of embossing block mounting plates 401, each set of embossing block mounting plates 401 is provided corresponding to each set of embossing block extension slots 6, and multiple sets of embossing blocks 3 are provided on each set of embossing block mounting plates 401. Each set of embossing block 3 mounting plates is provided with a driving component for driving the multiple sets of embossing blocks 3 to move.

[0026] Specifically, the main embossing roller 101 has a cavity inside for placing the embossing block telescopic assembly 4. The embossing block telescopic assembly 4 includes base blocks 402 symmetrically arranged on both sides and a main shaft 403 rotatably connected between the two base blocks 402. The embossing block telescopic assembly 4 also includes a sleeve 404 threaded on the main shaft 403 and a connecting rod 405 connecting the sleeve 404 and the embossing block mounting plate 401. One end of the connecting rod 405 is rotatably connected to the sleeve 404 and the other end is rotatably connected to the embossing block mounting plate 401.

[0027] Specifically, the sleeve 404 and the connecting rod 405 are symmetrically arranged on both sides of the main shaft 403 along its length, and the two end faces of the embossed block mounting plate 401 along its length are fitted to the inner wall of the expansion groove.

[0028] Specifically, the embossed block mounting plate 401 has multiple sets of mounting grooves 9 along the width direction. Each set of embossed blocks 3 has a sliding plate 10 that is embedded in a set of mounting grooves 9. The sliding plate 10 of each set of embossed blocks 3 is arranged in the same order in the mounting grooves 9. The driving component includes a lead screw 11 that is rotatably arranged at each set of mounting grooves 9. The lead screw 11 passes through the sliding plate 10 in the corresponding mounting groove 9 and forms a threaded connection with the sliding plate 10.

[0029] Specifically, a scale 12 is provided on one side of the embossed block mounting plate 401, and a scale 12 is also provided on the inner wall of the embossed block extension groove 6. Multiple sets of filling blocks 13 are slidably arranged in the embossed block extension groove 6, and the filling blocks 13 and multiple sets of embossed blocks 3 on the embossed block mounting plate 401 fill the embossed block extension groove 6.

[0030] Specifically, the main embossing roller 101 has an annular groove 8 on one side, and the side of the embossing block extending out of the groove 6 is connected to the annular groove 8. The auxiliary embossing roller 102 is connected to the main embossing roller 101 by a threaded connection with the outer wall of the annular groove 8. A limiting member 17 to prevent mutual rotation is also connected between the auxiliary embossing roller 102 and the main embossing roller 101.

[0031] Specifically, the limiting component 17 includes a locking disc 171 and a locking rod 172. One end of the locking rod 172 is cylindrical and forms a rotatable connection with the locking disc 171, while the other end is square. The auxiliary embossing roller 102 is provided with a threaded groove 20 for threaded connection of the locking disc 171 and a first square groove 18 for the square end of the locking rod 172 to be inserted. The base block 402 is provided with a second square groove 19 for the square end of the locking rod 172 to be inserted.

[0032] Specifically, the spindle 403 has an internal hexagonal slot 21 on the side near the second square slot 19, and the internal hexagonal slot 21 is connected to the second square slot 19.

[0033] A specific application example of this embodiment is as follows:

[0034] Reference Figure 1 The embossing rollers 1 are arranged symmetrically on the top and bottom. The two ends of the embossing rollers 1 are equipped with rotating shafts 2. The servo motor drives the two sets of embossing rollers 1 to rotate and emboss the paper towel. The rotation and embossing process of the embossing rollers 1 is the same as that of the existing technology, so it will not be described in detail.

[0035] Reference Figure 2 , 5 The embossing roller 1 includes a main embossing roller 101 and a secondary embossing roller 102 detachably connected to the main embossing roller 101. The main embossing roller 101 has an axial mounting port 5 on one side for inserting the embossing block telescopic assembly 4 and the embossing block 3. The embossing block telescopic assembly 4 slides into the cavity of the embossing roller 1 through the mounting port 5. After the embossing block telescopic assembly 4 slides into the cavity, the secondary embossing roller 102 is installed on the main embossing roller 101, thereby restricting the movement of the embossing block telescopic assembly 4.

[0036] Reference Figure 2 , 3 The outer wall of the main embossing roller 101 is provided with multiple sets of embossing block protrusion grooves 6 for the embossing blocks 3 to protrude. The embossing blocks 3 are provided with embossed pattern protrusions 301. When the embossing blocks 3 extend to the outermost end of the embossing block protrusion grooves 6, the outer surface of the embossing blocks 3 is arc-shaped and coincides with the outer peripheral surface of the embossing roller 1, with only the pattern protrusions 301 protruding from the outer surface of the embossing roller 1. The number of embossing block protrusion grooves 6 can be set according to the number of tissues that need to be embossed over a certain length. In this embodiment, The embossing block protrusion grooves 6 on the embossing roller 1 are preferably four sets; the embossing block telescopic assembly 4 includes multiple sets of embossing block mounting plates 401, each set of embossing block mounting plates 401 is set corresponding to each set of embossing block protrusion grooves 6, and each set of embossing blocks 3 on the embossing block mounting plate 401 is provided with multiple sets. The number of embossing blocks 3 can be set according to the number of embossings required for a certain width distance of the paper towel. In this embodiment, three sets are selected. Each set of embossing block 3 mounting plate is provided with a driving component to drive the movement of multiple sets of embossing blocks 3.

[0037] Reference Figure 3 The embossing block telescopic assembly 4 includes base blocks 402 symmetrically arranged on both sides and a main shaft 403 rotatably connected between the two base blocks 402. The embossing block telescopic assembly 4 also includes a sleeve 404 threaded onto the main shaft 403 and a connecting rod 405 connecting the sleeve 404 and the embossing block mounting plate 401. One end of the connecting rod 405 is rotatably connected to the sleeve 404 and the other end is rotatably connected to the embossing block mounting plate 401. The embossing block telescopic assembly 4 is installed in the cavity of the main embossing roller 101. One base block 402 is located in the mounting opening 5 to restrict rotation. The main embossing roller 101 is provided with a slot 7 on the other side of the mounting opening 5 for the other base block 402 to be inserted. After the two base blocks 402 are engaged, the sleeve 404 can be moved on the main shaft 403 by rotating the main shaft 403. Under the action of the connecting rod 405, the movement of the sleeve 404 will push the embossing block mounting plate 401 to move radially along the main mounting roller in the mounting hole extension groove. It should be noted that after the embossed block mounting plate 401 is retracted by rotating the main shaft 403, the size of the mounting opening 5 is sufficient to allow the embossed block telescopic assembly 4 and the embossed block 3 to slide out.

[0038] Reference Figure 3 The sleeve 404 and the connecting rod 405 are symmetrically arranged on both sides of the main shaft 403 along its length. The two end faces of the embossed block mounting plate 401 along its length are fitted to the inner wall of the expansion groove. In this way, the mounting plate can be more stable when sliding in the embossed block extension groove 6 when the main shaft 403 is rotated.

[0039] Reference Figure 3 The embossed block mounting plate 401 has multiple sets of mounting grooves 9 along its width. Each set of embossed blocks 3 has a sliding plate 10 that is embedded in one set of mounting grooves 9. The sliding plate 10 of each set of embossed blocks 3 is arranged in the same order in the mounting grooves 9. The driving component includes a lead screw 11 that is rotatably arranged at each set of mounting grooves 9. The lead screw 11 passes through the sliding plate 10 in the corresponding mounting groove 9 and forms a threaded connection with the sliding plate 10. In this embodiment, the number of embossed blocks 3 provided on one set of embossed block mounting plate 401 is three sets, and the mounting grooves 9 on the embossed block mounting plate 401 are also provided in three sets. The sliding plate 10 on the first set of embossed blocks 3 is embedded in the first set of mounting grooves. Within 9, the sliding plate 10 on the second set of embossing blocks 3 is embedded in the second set of mounting grooves 9, and the sliding plate 10 on the third set of embossing blocks 3 is embedded in the third set of mounting grooves 9. By rotating the screw 11 at each set of mounting grooves 9, the embossing block 3 at the corresponding sliding plate 10 in the mounting groove 9 can be moved, so that more width combinations of embossing can be printed as needed. A third internal hexagonal groove is provided on one side of the screw 11, and the embossing block 3 can be driven to move by rotating the screw 11 with a hexagonal wrench. It should be noted that the two ends of the screw 11 are flush with the two ends of the embossing block mounting plate 401 to avoid affecting the movement of the embossing block mounting plate 401 in the embossing block extension groove 6.

[0040] Reference Figure 2 The embossing block mounting plate 401 has a scale 12 on one side, and the inner wall of the embossing block extension groove 6 also has a scale 12. Multiple sets of filling blocks 13 are slidably arranged in the embossing block extension groove 6. The filling blocks 13 and the multiple sets of embossing blocks 3 on the embossing block mounting plate 401 fill the embossing block extension groove 6. The width of the embossing block 3 is a multiple of the width of the filling block 13. In actual use, when the embossing block 3 moves to the surface of the embossing block extension groove 6, the filling blocks 13 fill the opening of the embossing block extension groove 6 other than the embossing block 3, so that the surface of the embossing roller 1 is closed. When the number of embossed blocks 3 on the embossed block mounting plate 401 changes, the filling blocks 13 can be increased or decreased by a multiple of the embossed blocks 3 so that the embossed blocks 3 and the filling blocks 13 can just fill the embossed block protrusion groove 6. When using, when adjusting the position of each group of embossed blocks 3 according to the needs of the embossing position, the embossed blocks 3 can be adjusted by observing the scale 12 on the embossed block mounting plate 401, and the filling blocks 13 can be slid by observing the scale 12 at the embossed block protrusion groove 6 so that the filling blocks 13 leave an protrusion opening 14 for the embossed blocks 3 to protrude.

[0041] refer to Figure 3 , 4 The main embossing roller 101 has an annular groove 8 on one side, and the side of the embossing block protruding from the groove 6 is connected to the annular groove 8. When adjusting the number of filling blocks 13 according to the number of embossing blocks 3, the filling blocks 13 can slide into or out of the embossing block protruding from the groove 6 through the connection between the embossing blocks 3 and the annular groove 8. The auxiliary embossing roller 102 is connected to the main embossing roller 101 through a threaded connection with the outer wall of the annular groove 8. After the auxiliary embossing roller 102 is installed on the main embossing roller 101, it will restrict the movement of the filling blocks 13. A limiting member 17 to prevent mutual rotation is also connected between the auxiliary embossing roller 102 and the main embossing roller 101. A limiting groove 15 is provided on the inner wall of the embossing block protruding from the groove 6, and limiting plates 16 embedded in the limiting groove 15 are provided on both sides of the filling plate to prevent the filling blocks 13 from detaching when sliding in the embossing block protruding from the groove 6.

[0042] Reference Figure 5 , 6 The limiting component 17 includes a locking disc 171 and a locking rod 172. One end of the locking rod 172 is cylindrical and rotatably connected to the locking disc 171, while the other end is square. The auxiliary embossing roller 102 has a threaded groove 20 for threaded connection of the locking disc 171 and a first square groove 18 for the square end of the locking rod 172 to be inserted. One side of the base block 402 has a second square groove 19 for the square end of the locking rod 172 to be inserted. When the locking disc 171 is fixed in the threaded groove 20, the locking rod 172 will be located in the first square groove 18 and the second square groove 19, thereby preventing relative rotation between the main embossing roller 101 and the auxiliary embossing roller 102 during operation. It should be noted that the outer end face of the locking disc 171 has a second internal hexagonal groove 22, which can be used to lock the locking disc 171 into the threaded groove 20 using a hexagonal wrench.

[0043] Reference Figure 5 , 6 The main shaft 403 is provided with an internal hexagonal groove 21 on the side near the second square groove 19. The internal hexagonal groove 21 is connected to the second square groove 19. When it is necessary to rotate the main shaft 403 to drive the embossing block mounting plate 401 to move, the auxiliary embossing roller 102 can be removed, and then the main shaft 403 can be rotated through the internal hexagonal groove 21 using a hexagonal wrench. This allows the operation to be carried out without removing the embossing block telescopic assembly 4.

[0044] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surface embossing device for producing tissue paper, comprising an embossing roller (1), characterized in that: It also includes embossing blocks (3) and embossing block telescopic assembly (4) for driving embossing blocks (3) to move radially along embossing roller (1). The embossing roller (1) includes a main embossing roller (101) and a secondary embossing roller (102) detachably connected to the main embossing roller (101). The main embossing roller (101) has an axially provided mounting port (5) for the embossing block telescopic assembly (4) and embossing blocks (3) to be inserted. The outer wall of the main embossing roller (101) has multiple sets of embossing block protrusion slots (6) for the embossing blocks (3) to protrude along the periphery. The embossing block telescopic assembly (4) includes multiple sets of embossing block mounting plates (401). Each set of embossing block mounting plates (401) is set with each set of embossing block protrusion slots (6). Each set of embossing blocks (3) on the embossing block mounting plate (401) has multiple sets of embossing blocks (3). Each set of embossing blocks (3) on the mounting plate has a driving component for driving multiple sets of embossing blocks (3) to move. The main embossing roller (101) has a cavity inside for placing the embossing block telescopic assembly (4). The embossing block telescopic assembly (4) includes base blocks (402) symmetrically arranged on both sides and a main shaft (403) rotatably connected between the two base blocks (402). The embossing block telescopic assembly (4) also includes a sleeve (404) threaded on the main shaft (403) and a connecting rod (405) connected between the sleeve (404) and the embossing block mounting plate (401). One end of the connecting rod (405) is rotatably connected to the sleeve (404) and the other end is rotatably connected to the embossing block mounting plate (401). The embossed block mounting plate (401) is provided with multiple sets of mounting grooves (9) along the width direction. Each set of embossed blocks (3) is provided with a sliding plate (10) embedded in a set of mounting grooves (9). The sliding plate (10) of each set of embossed blocks (3) is arranged in the same order in the mounting grooves (9) corresponding to the embossed blocks (3). The driving component includes a lead screw (11) rotatably arranged at each set of mounting grooves (9). The lead screw (11) passes through the sliding plate (10) in the corresponding mounting groove (9) and forms a threaded connection with the sliding plate (10). The embossed block mounting plate (401) has a scale (12) on one side, and the inner wall of the embossed block extension groove (6) also has a scale (12). Multiple sets of filling blocks (13) are slidably arranged in the embossed block extension groove (6). The filling blocks (13) and the multiple sets of embossed blocks (3) on the embossed block mounting plate (401) fill the embossed block extension groove (6). The main embossing roller (101) has an annular groove (8) on one side. The side of the embossing block extending out of the groove (6) is connected to the annular groove (8). The auxiliary embossing roller (102) is connected to the main embossing roller (101) by a threaded connection with the outer wall of the annular groove (8). A limiting member (17) to prevent mutual rotation is also connected between the auxiliary embossing roller (102) and the main embossing roller (101). The limiting component (17) includes a locking disc (171) and a locking rod (172). One end of the locking rod (172) is cylindrical and rotates with the locking disc (171), while the other end is square. The auxiliary embossing roller (102) is provided with a threaded groove (20) for the locking disc (171) to be threaded and a first square groove (18) for the square end of the locking rod (172) to be inserted. The base block (402) is provided with a second square groove (19) for the square end of the locking rod (172) to be inserted on one side.

2. The surface embossing device for producing household paper towels according to claim 1, characterized in that: The sleeve (404) and the connecting rod (405) are symmetrically arranged on both sides of the main shaft (403) along its length, and the two end faces of the embossed block mounting plate (401) along its length are fitted to the inner wall of the expansion groove.

3. The surface embossing device for producing household paper towels according to claim 2, characterized in that: The spindle (403) has an internal hexagonal groove (21) on the side near the second square groove (19), and the internal hexagonal groove (21) is connected to the second square groove (19).

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