Double-elastic-piece type mechanical half-folding forming mechanism

Abstract

The utility model belongs to the technical field of tissue processing equipment, and discloses a double-elastic-piece type mechanical half-folding forming mechanism which comprises a finger pressing mechanism, a paper pressing mechanism, a paper pressing mechanism, a paper pressing mechanism and a paper pressing mechanism, the finger pressing mechanism comprises two sets of pressing fingers which are oppositely arranged, and a paper guiding gap is formed between the two sets of pressing fingers; the finger folding mechanism comprises a first folding finger and a second folding finger which are oppositely arranged, a finger folding groove is formed in the tail end of the first folding finger, and a fingertip part capable of being inserted into the finger folding groove is arranged at the tail end of the second folding finger; the paper towel penetrating through the paper guiding gap is bent into an S shape below one of the pressing fingers along a paper folding channel formed by the finger folding groove and the fingertip portion in a matched mode. In conclusion, mechanical folding is adopted to replace a traditional blowing type process, efficient and stable paper towel forming is achieved through cooperation of the finger pressing mechanism and the finger folding mechanism, and the paper towel folding machine has the advantages that folding mark forming is more accurate and reliable, the folding requirements of paper towels made of different materials can be effectively met, and the application range is wider.

Description

A double-spring type mechanical semi-folding forming mechanism Technical Field

[0001] This utility model belongs to the technical field of tissue paper processing equipment, specifically relating to a double-spring type mechanical half-folding forming mechanism. Background Technology

[0002] For finished pull-out facial tissues, the back portion of the top tissue in the stack needs to be folded to form a half-fold tail, making it easier for users to pull out the first tissue. In traditional tissue half-folding, a combination of pressure fingers and an air-blowing mechanism is used to fold the tissue under air pressure. However, this air-blowing folding method has some problems in practical applications; for example, if the tissue is made of a stiff material, insufficient air pressure will not be able to bend it, thus failing to complete the half-fold; excessive air pressure can easily cause misalignment between adjacent tissues. Furthermore, it may cause damage to the tissue surface or uneven folding, especially for more fragile tissues or those made of special materials. Summary of the Invention

[0003] In view of this, in order to solve the problems mentioned in the background art, the purpose of this utility model is to provide a double-spring type mechanical semi-folding forming mechanism.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a double-spring type mechanical semi-folding forming mechanism, comprising: a pressing finger mechanism, including two sets of pressing fingers arranged opposite each other, with a paper guide gap formed between the two sets of pressing fingers; a folding finger mechanism, including a first folding finger and a second folding finger arranged opposite each other, the first folding finger having a folding finger groove at its end, and the second folding finger having a fingertip at its end that can be inserted into the folding finger groove; wherein, a tissue paper passing through the paper guide gap is bent into an S-shape below one of the pressing fingers along the folding paper channel formed by the folding finger groove and the fingertip.

[0005] Preferably, the finger groove is a wedge-shaped groove that gradually narrows from the opening to the root.

[0006] Preferably, the first folding finger end is provided with an upper fingertip located above the folding finger groove; when folding paper, the paper guide gap is projected from top to bottom between the two ends of the upper fingertip.

[0007] Preferably, the first folded finger end is provided with a lower fingertip located below the folded finger groove, and the length of the lower fingertip is not greater than the length of the upper fingertip.

[0008] Preferably, the dual-spring mechanical semi-folding forming mechanism further includes: a fixed beam; a first movable beam connected to the fixed beam via a first moving drive assembly, wherein the pressing finger mechanism is mounted on the first movable beam; and a second movable beam connected to the fixed beam via a second moving drive assembly, wherein the folding finger mechanism is mounted on the second movable beam.

[0009] Preferably, the first motion drive assembly includes a servo motor mounted on the fixed beam via a motor mount, and a first link and a second link rotatably connected between the output end of the servo motor and the first movable beam.

[0010] Preferably, the first moving drive assembly further includes a drive shaft and a hinge, the first link is rotatably connected to the output end of the servo motor via the drive shaft, the second link is rotatably connected to the first movable beam via the hinge, and the rotation center of the second link and the hinge is offset relative to the drive shaft.

[0011] Preferably, the first moving drive assembly further includes a bearing seat, through which the drive shaft is mounted to the fixed beam.

[0012] Preferably, the second moving drive assembly includes a telescopic power unit, a positioning rod, and a positioning seat; the cylinder and piston rod of the telescopic power unit are respectively mounted on the fixed beam and the second movable beam, the positioning rod is mounted on the second movable beam, and slides through the positioning seat mounted on the fixed beam.

[0013] Preferably, the double-spring type mechanical semi-folding forming mechanism further includes a guide assembly, which includes a guide rail mounted on the fixed beam via a mounting plate and a first slide and a second slide slidably mounted on the guide rail. The first movable beam is mounted on the first slide, and the second movable beam is mounted on the second slide.

[0014] Compared with existing technologies, this invention offers the following advantages: It provides a double-spring-type mechanical half-folding forming mechanism. This mechanism uses innovative mechanical folding instead of traditional air-blowing folding. Specifically, through the synergistic action of the pressure finger mechanism and the folding finger mechanism, it achieves a highly efficient and stable tissue paper forming effect. The opposing pressure finger groups in this mechanism form a precise paper guide gap, ensuring a stable tissue paper conveying trajectory. The specially designed first and second folding fingers, through the clever cooperation of the folding finger groove and fingertip, guide the tissue paper to naturally fold into a standard S-shaped structure. This mechanically constrained folding method has significant advantages over traditional air-blowing processes: First, mechanical crease forming is more precise and reliable, avoiding the irregular creases that may be caused by air-blowing; second, the mechanical structure's drive can be applied to the folding drive and guidance of tissue paper of different materials, with a wider range of applications, providing a more stable and efficient folding solution for tissue paper production lines. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the planar structure of this utility model;

[0016] Figure 2 is one of the three-dimensional structural schematic diagrams of this utility model;

[0017] Figure 3 is a second three-dimensional structural schematic diagram of this utility model;

[0018] Figure 4 is an enlarged view of point A in Figure 3;

[0019] Figure 5 is a schematic diagram of the structure of the first folding finger in this utility model;

[0020] Figure 6 is a schematic diagram of the structure of the second folding finger in this utility model.

[0021] In the diagram: 1. Pressing finger; 2. First folding finger; 21. Folding finger groove; 22. Upper fingertip; 23. Lower fingertip; 3. Second folding finger; 31. Finger tip; 4. Fixed beam; 5. First movable beam; 6. Second movable beam; 7. First moving drive assembly; 71. Servo motor; 72. First connecting rod; 73. Second connecting rod; 74. Drive shaft; 75. Hinge seat; 76. Shaft seat; 8. Second moving drive assembly; 81. Telescopic power unit; 82. Positioning rod; 83. Positioning seat; 9. Guide assembly; 91. Guide rail; 92. First slide; 93. Second slide; 94. Mounting plate. Detailed Implementation

[0022] To further understand the content of this utility model, a detailed description of it is provided in conjunction with the accompanying drawings and embodiments. The structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art; they are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model. It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to the embodiments of this application described herein.

[0023] As shown in Figures 1-6, the present invention provides a double-spring-type mechanical half-folding forming mechanism, comprising a fixed beam 4, a first movable beam 5, a second movable beam 6, a pressing finger mechanism, a folding finger mechanism, a first moving drive assembly 7, a second moving drive assembly 8, and a guide assembly 9. Specifically, the fixed beam 4 provides stable support for the overall mechanism; the first moving drive assembly 7 connects the first movable beam 5 and the fixed beam 4; the pressing finger mechanism is mounted on the first movable beam 5; the second moving drive assembly 8 connects the second movable beam 6 and the fixed beam 4; and the folding finger mechanism is mounted on the second movable beam 6. This enables horizontal movement of the pressing finger mechanism and the folding finger mechanism, and completes the half-folding of the tissue paper under the horizontal movement of the pressing finger mechanism and the folding finger mechanism.

[0024] For example, the pressing mechanism includes two sets of pressing fingers 1 arranged opposite each other, and a paper guide gap is formed between the two sets of pressing fingers 1; the folding mechanism includes a first folding finger 2 and a second folding finger 3 arranged opposite each other, the first folding finger 2 is provided with a folding finger groove 21 at its end, and the second folding finger 3 is provided with a fingertip 31 at its end that can be inserted into the folding finger groove 21; wherein, the paper towel passing through the paper guide gap is bent into an S-shape below one of the pressing fingers 1 along the folding paper channel formed by the folding finger groove 21 and the fingertip 31.

[0025] Based on the above structure, two sets of pressure fingers 1, arranged in opposite directions, form a precise paper guide gap, ensuring a stable paper towel conveying trajectory. The specially designed first folding finger 2 and second folding finger 3, through the clever cooperation of the folding finger groove 21 and the fingertip 31, guide the paper towel to naturally fold into a standard S-shaped structure. This mechanically constrained folding method has significant advantages over traditional air-blowing processes: First, mechanical crease forming is more precise and reliable, avoiding the irregular creases that may be caused by air-blowing; second, the mechanical drive can be used for folding and guiding different types of paper towels, making it more widely applicable; third, the use of high-quality materials and precision machining ensures that the equipment maintains stable folding quality even under long-term high-speed operation. These designs not only solve technical problems such as crease rebound and fiber damage in traditional folding processes, but their simple and efficient structural features also greatly reduce maintenance costs, providing reliable technical support for the intelligent upgrading of paper towel production lines. They are particularly suitable for paper towel production lines with strict folding quality requirements.

[0026] Referring to Figures 3 and 5, in some embodiments, the folding groove 21 is a wedge-shaped groove that gradually narrows from the opening to the root. This tapering structure, guided by the fingertip 31 of the second folding finger 3, allows the tissue paper to be folded more precisely into the folding groove 21. The guiding effect of the wedge-shaped groove significantly improves folding accuracy, ensuring the tissue paper folds smoothly along a predetermined trajectory, forming a regular S-shaped structure, effectively solving the crease misalignment problem commonly found in traditional folding methods.

[0027] Referring to Figures 3 and 5, in some embodiments, the end of the first folding finger 2 is provided with an upper fingertip 22 located above the folding finger groove 21; during folding, the projection of the paper guide gap from top to bottom is between the two ends of the upper fingertip 22. Under this structural design, it is ensured that the end of the tissue paper completes a double folding action under mechanical constraints: first, the upper fingertip 22 guides the front end of the tissue paper to complete the first fold; then, through the precise cooperation between the folding finger groove 21 and the upper fingertip 22, the end of the tissue paper is naturally bent to form a second fold, and finally the end is precisely folded under one of the pressing fingers; this mechanical constraint not only ensures the regularity of the S-shaped crease, but also achieves the precise positioning of the half-fold of the end, effectively solving the technical problem of incomplete or offset end folding in traditional folding processes.

[0028] Referring to Figures 3 and 5, in some embodiments, the end of the first folding finger 2 is provided with a lower fingertip 23 located below the folding finger groove 21, and the length of the lower fingertip 23 is not greater than the length of the upper fingertip 22. Thus, the supporting effect of the lower fingertip 23 ensures that the tissue paper can form a regular S-shaped structure within the folding finger groove 21, and a portion of the tissue paper's tail extends outside the lower fingertip 23 to facilitate contact with the tissue paper holder, thereby effectively preventing deformation of the S-shaped half-fold structure when the first folding finger 2 retracts. This design not only improves folding accuracy but also enhances the stability of tissue paper formation, is suitable for tissue paper of different materials and thicknesses, and significantly improves production efficiency and product quality.

[0029] Referring again to Figures 2 and 3, the first motion drive assembly 7 includes a servo motor 71 mounted on the fixed beam 4 via a motor mount, and a first link 72 and a second link 73 rotatably connected between the output end of the servo motor 71 and the first movable beam 5. Specifically, the first link 72 is rotatably connected to the output end of the servo motor 71 via a drive shaft 74, the drive shaft 74 is mounted on the fixed beam 4 via a bearing 76, and the second link 73 is rotatably connected to the first movable beam 5 via a hinge 75. Thus, when the servo motor 71 is activated, the servo motor 71 drives the first link 72 to swing via the drive shaft 74, thereby changing the relative angle between the first link 72 and the second link 73, and thereby generating a pushing or pulling driving effect on the first movable beam 5 to complete the horizontal movement of the pressing finger mechanism. The pressing finger mechanism includes two sets of pressing fingers 1 arranged opposite each other. Correspondingly, the fixed beam 4, the first movable beam 5, and the first motion drive assembly 7 should also be provided in two sets to drive the two sets of pressing fingers 1 to perform horizontal movements in opposite directions.

[0030] It should be noted that the rotation centers of the second connecting rod 73 and the hinge seat 75 are offset relative to the drive shaft 74. With this structural design, even if the rotation speed of the drive shaft 74 is constant, the first movable beam 5 can have different movement speeds at different moving positions, thereby matching different usage needs; for example, the first movable beam 5 can have a quick return characteristic, thereby realizing the rapid retraction of the pressure finger 1 in the horizontal direction.

[0031] Referring again to Figures 2 and 3, the second moving drive assembly 8 includes a telescopic power unit 81, a positioning rod 82, and a positioning seat 83. The cylinder and piston rod of the telescopic power unit 81 are respectively mounted on the fixed beam 4 and the second movable beam 6. The positioning rod 82 is mounted on the second movable beam 6 and slides through the positioning seat 83 mounted on the fixed beam 4. Thus, under the multi-stage linkage drive of the telescopic power unit 81, it can maintain a constant output torque within its stroke range, enabling the second movable beam 6 to move horizontally at a uniform speed at different positions. This uniform motion characteristic directly ensures the stability of the movement trajectory of the first folding finger 2 and the second folding finger 3 during the folding process, avoiding speed fluctuation problems that may occur with motor drive, and ensuring that the folding fingers move gently and precisely when contacting the tissue. This not only meets the process requirements of S-shaped folding but also significantly improves the reliability and service life of the equipment, providing a stable power guarantee for continuous and efficient tissue production.

[0032] Referring again to Figures 2 and 4, the guide assembly 9 includes a guide rail 91 mounted on the fixed beam 4 via a mounting plate 94, and a first slide block 92 and a second slide block 93 slidably mounted on the guide rail 91. The first movable beam 5 is mounted on the first slide block 92, and the second movable beam 6 is mounted on the second slide block 93.

[0033] In summary, the double-spring-type mechanical half-folding forming mechanism provided by this utility model, when specifically performing the half-folding of a tissue, operates on the following principle: two sets of first moving drive components 7 are activated, driving two sets of pressure fingers 1 to approach each other, thereby achieving an insertion action to fold the tissue; in this state, the two sets of pressure fingers 1 receive the folded tissue above them, and half of the bottom half of the tissue rests on one of the pressure fingers 1, while the other half hangs down through the paper guide gap between the two sets of pressure fingers 1; one set of second moving drive components 8 drives the first folding finger 2 to move horizontally, thereby using the upper fingertip 22 of the first folding finger 2 to achieve the first fold of the hanging half of the tissue; then, another set of second moving drive components... 8 drives the second folding finger 3 to move horizontally, thereby utilizing the cooperation between the second folding finger 3 and the folding finger groove 21 to achieve the second fold of the drooping half of the tissue paper. After the above two folds, the tissue paper is bent into an S-shape under one of the pressure fingers 1 to complete the half-fold process. In addition, the tissue paper folding and packaging production line also includes a tray for transporting tissue paper. When the tray rises and abuts against the lower finger tip 23, the first folding finger 2 and the second folding finger 3 retract horizontally under the drive of two sets of second moving drive components 8, thereby allowing the half-folded tissue paper to be supported on the tray. The tray continues to rise until it cooperates with the two sets of pressure fingers 1, pressing the tissue paper to the half-fold position. At the same time, the two sets of pressure fingers 1 retract horizontally under the drive of two sets of first moving drive components 7. Then, the above operation is repeated to achieve continuous production of folded tissue paper.

[0034] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A double-spring type mechanical semi-folding forming mechanism, characterized in that, include: The pressure finger mechanism includes two sets of pressure fingers (1) arranged opposite to each other, and a paper guide gap is formed between the two sets of pressure fingers (1); The folding mechanism includes a first folding finger (2) and a second folding finger (3) arranged opposite to each other. The first folding finger (2) is provided with a folding finger groove (21) at its end, and the second folding finger (3) is provided with a fingertip (31) at its end that can be inserted into the folding finger groove (21). The paper towel passing through the paper guide gap is bent into an S-shape below one of the pressing fingers (1) along the folding channel formed by the folding finger groove (21) and the fingertip (31).

2. The double-spring type mechanical semi-folding forming mechanism according to claim 1, characterized in that: The finger groove (21) is a wedge-shaped groove that gradually narrows from the opening to the root.

3. The double-spring type mechanical semi-folding forming mechanism according to claim 1, characterized in that: The first folding finger (2) has an upper fingertip (22) located above the folding finger groove (21) at its end; when folding paper, the paper guide gap is projected from top to bottom between the two ends of the upper fingertip (22).

4. The double-spring type mechanical semi-folding forming mechanism according to claim 3, characterized in that: The first folded finger (2) has a lower fingertip (23) located below the folded finger groove (21) at its end, and the length of the lower fingertip (23) is not greater than the length of the upper fingertip (22).

5. The double-spring type mechanical semi-folding forming mechanism according to claim 1, characterized in that, Also includes: Fixed beam (4); first movable beam (5), which is connected to fixed beam (4) via first moving drive assembly (7), the pressing finger mechanism is installed on the first movable beam (5); second movable beam (6), which is connected to fixed beam (4) via second moving drive assembly (8), the folding finger mechanism is installed on the second movable beam (6).

6. The double-spring type mechanical semi-folding forming mechanism according to claim 5, characterized in that: The first moving drive assembly (7) includes a servo motor (71) mounted on the fixed beam (4) via a motor mount, and a first link (72) and a second link (73) rotatably connected between the output end of the servo motor (71) and the first movable beam (5).

7. The double-spring type mechanical semi-folding forming mechanism according to claim 6, characterized in that: The first moving drive assembly (7) further includes a drive shaft (74) and a hinge (75). The first connecting rod (72) is rotatably connected to the output end of the servo motor (71) through the drive shaft (74). The second connecting rod (73) is rotatably connected to the first movable beam (5) through the hinge (75). The rotation center of the second connecting rod (73) and the hinge (75) is offset relative to the drive shaft (74).

8. The double-spring type mechanical semi-folding forming mechanism according to claim 7, characterized in that: The first moving drive assembly (7) also includes a bearing seat (76), through which the drive shaft (74) is mounted to the fixed beam (4).

9. The double-spring type mechanical semi-folding forming mechanism according to claim 5, characterized in that: The second moving drive assembly (8) includes a telescopic power unit (81), a positioning rod (82), and a positioning seat (83); the cylinder and piston rod of the telescopic power unit (81) are respectively mounted on the fixed beam (4) and the second movable beam (6), the positioning rod (82) is mounted on the second movable beam (6), and slides through the positioning seat (83) mounted on the fixed beam (4).

10. A double-spring type mechanical semi-folding forming mechanism according to claim 5, characterized in that: It also includes a guide assembly (9), which includes a guide rail (91) mounted on the fixed beam (4) via a mounting plate (94) and a first slide (92) and a second slide (93) slidably mounted on the guide rail (91), wherein the first movable beam (5) is mounted on the first slide (92) and the second movable beam (6) is mounted on the second slide (93).

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