Bag body creasing mechanism of square-bottom paper bag machine and square-bottom paper bag machine thereof

Abstract

The utility model relates to the field of paper bag processing equipment, and discloses a bag body creasing mechanism of a square-bottom paper bag machine, which comprises a mounting shaft I and a mounting shaft II which are correspondingly arranged, the mounting shaft I and the mounting shaft II are connected with a power source for driving the mounting shaft I and the mounting shaft II to rotate, and at least two creasing knives are axially arranged on the mounting shaft I; every two adjacent creasing cutters are arranged in parallel at intervals, an elastic supporting roller is installed on the second installation shaft, the creasing cutters correspond to the elastic supporting roller in position, and the power source drives the first installation shaft to rotate so that every two adjacent creasing cutters can be extruded with the elastic supporting roller in sequence and used for generating two creasing marks on a paper bag passing through the position between the first installation shaft and the second installation shaft. And the distance between the two indentations is adjusted through the change of the rotating speed of the mounting shaft I or / and the mounting distance of the adjacent indentation cutters. By changing the rotating speed of the first mounting shaft or adjusting the mounting distance of the adjacent creasing cutters, the creasing distance can be flexibly adjusted, the paper bag creasing device is suitable for paper bags of different specifications, the adjusting process is simplified, the operation time is shortened, and the labor intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the field of paper bag processing equipment, in particular to an indentation mechanism for the bag body of a square-bottom paper bag machine and the square-bottom paper bag machine. Background Technique

[0002] In order to form packaging bags, especially paper square-bottom packaging bags, an indentation device is needed to press creases. Usually, two or more creases are required. The existing indentation device uses an upper convex indentation knife film and a lower concave indentation knife die to indent the bag body. Since different paper bag lengths and bag bottom sizes are different, the distance of the indented creases needs to be adjusted accordingly according to requirements. Therefore, it is required to adjust the position between the knife dies of the upper and lower dies. The indentation mechanism of the prior art is as shown in the attached specification Figure 3 , which adopts two parallel upper rotating rollers 3 and lower rotating rollers 4 that are parallel up and down. A fixed disk 31 and a movable disk 32 are installed on the upper rotating roller 3. An upper mounting strip 33 and an upper mounting strip 34 are fixed in the groove between the fixed disk 31 and the movable disk 32. Upper grooves are provided on the upper mounting strip 33 and the upper mounting strip 34, and upper indentation cutters 35 are arranged in the upper grooves. The upper mounting strip 33 and the upper mounting strip 34 are respectively fixed on the fixed disk 31 and the movable disk 32. The included angle between the fixed disk 31 and the movable disk 32 can be adjusted in several levels, so that the distance between the upper mounting strip 33 and the upper mounting strip 34 can also be adjusted in several levels. Correspondingly, a movable indentation strip 41 and a fixed indentation strip 42 are arranged on the lower rotating roller 4. Concave indentation grooves 43 are provided on both the movable indentation strip 41 and the fixed indentation strip 42. The concave indentation grooves 43 are used to cooperate with the upper indentation cutters 35 to indent the packaging bag. The indentation mechanism of the prior art has the following disadvantages:

[0003] 1. The movable indentation strip 41 can be axially rotated and fixed on the mounting ring 44 of the lower rotating roller 4 through bolts. However, the upper rotating roller 3 and the lower rotating roller 4 are completely parallel and opposite up and down. To adjust the distance between the movable indentation strip 41 and the fixed indentation strip 42 on the lower rotating roller 4, the lower rotating roller 4 will be blocked by the upper rotating roller 3, and the upper rotating roller 3 must be disassembled first. The overall process is complex, time-consuming and laborious. Moreover, since the adjustment of the distance between the mounting strips on the upper rotating roller 3 has gears, it is not suitable for adjusting the indentation of any specification.

[0004] 2. Since the continuously conveyed packaging bag is first cut and then indented, the position of the existing indentation device on the machine frame is relatively high, which is more inconvenient for manually adjusting the distance between the upper mounting strip 33 and the upper mounting strip 34 and the distance between the movable indentation strip 41 and the fixed indentation strip 42.

[0005] To address the drawbacks of the above two existing technologies and improve production efficiency, a new type of indentation mechanism is needed to make the adjustment of the indentation spacing more convenient or to achieve the adjustment of the indentation spacing without adjusting the installation bar and the indentation bar. Summary of the Invention

[0006] The utility model aims at the drawbacks in the prior art and provides a bag body indentation mechanism for a square-bottom paper bag machine and the square-bottom paper bag machine.

[0007] To solve the above technical problems, the utility model is solved by the following technical solutions:

[0008] A bag body indentation mechanism for a square-bottom paper bag machine includes a corresponding first installation shaft and a second installation shaft. The first installation shaft and the second installation shaft can rotate in opposite directions, and at least one of them is connected to a power source that drives its rotation. An indentation knife is axially arranged on the first installation shaft. There are at least two indentation knives, and adjacent indentation knives are parallel and spaced apart. An elastic support roller is installed on the second installation shaft, and the position of the indentation knife corresponds to the position of the elastic support roller. The power source drives the first installation shaft to rotate, so that every two adjacent indentation knives are sequentially pressed against the elastic support roller, for generating two indentations on the paper bag passing between the first installation shaft and the second installation shaft. The spacing between the two indentations is adjusted by changing the rotation speed of the first installation shaft or / and adjusting the distance between adjacent indentation knives. By changing the rotation speed of the first installation shaft or adjusting the distance between adjacent indentation knives, the flexible adjustment of the indentation spacing is realized, which can adapt to paper bags of different specifications, avoiding the complex operation of disassembling the upper rotating roller to adjust the spacing in the prior art, simplifying the adjustment process, and reducing the operation time and labor intensity.

[0009] Preferably, the first installation shaft is located above the second installation shaft, and the length of the elastic support roller is not less than the length of the indentation knife.

[0010] Preferably, an installation disk is axially sleeved on the first installation shaft, an indentation knife seat is arranged on the installation disk, the indentation knife is arranged on the indentation knife seat, and the cutting edge of the indentation knife protrudes outward relative to the outer peripheral surface of the indentation knife seat.

[0011] Preferably, at least one indentation knife seat can change its installation position along the outer periphery of the installation disk, or the installation position of at least one indentation knife on the indentation knife seat can be adjusted back and forth and fixed, so as to adjust the distance between adjacent indentation knives.

[0012] Preferably, the indentation knife is fixedly installed on the first installation shaft, and the spacing between every two adjacent indentations on a single bag body is adjusted by changing the rotation speed of the first installation shaft.

[0013] Preferably, a first synchronous pulley is arranged on the side of the first mounting shaft, and a second synchronous pulley is arranged on the side of the second mounting shaft. The first synchronous pulley and the second synchronous pulley are linked to make the linear speeds of the surfaces of the indentation tool holder and the elastic support roller equal. The setting of the synchronous pulleys and the linkage mechanism ensure that the linear speeds of the surfaces of the indentation tool holder and the elastic support roller are equal, improving the accuracy of indentation. The adjustment can be achieved by introducing a servo motor to control the rotation speed, making the control of the indentation mechanism more automated and intelligent, and facilitating precise control. The adjustment method can be that on the same paper bag, from when the paper bag has not been indented to when the first indentation knife passes over the paper bag is the first rate, and within the indentation interval of the first two indentation knives on the paper bag, the rotation rates of the first mounting shaft and the second mounting shaft are the second rate. When the number of required indentations on the same paper bag is more than two, within the indentation interval of the last two indentation knives on the paper bag, the rotation rates of the first mounting shaft and the second mounting shaft are the third rate.

[0014] Preferably, both the first synchronous pulley and the second synchronous pulley are gears, and the first synchronous pulley and the second synchronous pulley mesh with each other.

[0015] The square-bottom paper bag machine includes a frame, on which an indentation mechanism and a cutting mechanism for the paper bag are arranged. The paper bag is processed from a roll of paper. The continuously conveyed uncut paper bag first passes through the indentation mechanism and then enters the cutting mechanism for cutting. The installation position of the indentation mechanism on the frame is lower than that of the cutting mechanism. The design that the position of the indentation mechanism is lower than that of the cutting mechanism makes the production process more reasonable and more convenient for workers to adjust the indentation mechanism at a lower position. At the same time, the cooperation and pressing of the indentation knife and the elastic support roller can make the paper bag hardly shrink in the front-back direction during indentation. Therefore, a structure of first indentating and then cutting the paper bag can be adopted, and the cut bag body does not need to be positioned and then indented, increasing the accuracy of the indentation mechanism.

[0016] Due to the adoption of the above technical solutions, the present utility model has remarkable technical effects: The paper bag indentation mechanism of the present utility model effectively solves the problems in the prior art such as difficult adjustment of indentation spacing, complex operation, and low production efficiency through innovative design. By changing the rotation speed of the first mounting shaft or adjusting the installation distance between adjacent indentation knives, rapid and precise adjustment of the indentation spacing is achieved, meeting the requirements of different specifications of paper bags. Generally speaking, the simplified structure and automatic control of the indentation mechanism of the present utility model improve the production efficiency, reduce manual intervention, lower the production cost, and the design improves the production efficiency and quality of the paper bag. Description of the Drawings

[0017] Figure 1 is the structural schematic diagram of the present utility model.

[0018] Figure 2 is the structural schematic diagram of the present utility model from another angle.

[0019] Figure 3It is a schematic diagram of the prior art structure in the background art.

[0020] The names of the parts referred to by each digital label in the above drawings are as follows: Among them, 1 is the first mounting shaft; 2 is the second mounting shaft; 11 is the indentation knife; 12 is the mounting disc; 13 is the indentation knife seat; 14 is the first synchronous pulley; 21 is the elastic support roller; 22 is the second synchronous pulley.

[0021] Reference numerals in the background art: 3 is the upper rotating roller; 4 is the lower rotating roller; 31 is the fixed disc; 32 is the movable disc; 33 is the first upper mounting strip; 34 is the second upper mounting strip; 35 is the upper indentation tool; 41 is the movable indentation strip; 42 is the fixed indentation strip; 43 is the indentation groove. Detailed implementation manners

[0022] The present utility model will be further described in detail below in conjunction with the drawings and embodiments.

[0023] Embodiment 1

[0024] An indentation mechanism for the bag body of a square-bottom paper bag machine, as Figures 1-2 shown, includes a correspondingly arranged first mounting shaft 1 and a second mounting shaft 2. The first mounting shaft and the second mounting shaft can rotate in opposite directions and at least one of them is connected to a power source that drives its rotation. The first mounting shaft and the second mounting shaft can each be provided with a power source, or one of them can be connected to a power source and drive the other mounting shaft to rotate in a linkage manner. An indentation knife 11 is axially arranged on the first mounting shaft 1. There are at least two indentation knives 11. The adjacent indentation knives 11 are parallel and spaced apart. An elastic support roller 21 is mounted on the second mounting shaft 2. The position of the indentation knife 11 corresponds to the position of the elastic support roller 21. The power source drives the first mounting shaft 1 to rotate so that every two adjacent indentation knives 11 are sequentially pressed against the elastic support roller 21, for generating two indentations on the paper bag passing between the first mounting shaft 1 and the second mounting shaft 2. The distance between the two indentations is adjusted by changing the rotation speed of the first mounting shaft 1 or / and adjusting the distance between the adjacent indentation knives 11 installed.

[0025] The first mounting shaft 1 is located above the second mounting shaft 2. The elastic support roller 21 can be an elastic rubber roller, and the length of the elastic support roller 21 is not less than the length of the indentation knife 11.

[0026] An installation disc 12 is axially sleeved on the first mounting shaft 1. An indentation knife seat 13 is arranged on the installation disc 12. The indentation knife 11 is arranged on the indentation knife seat 13. The cutting edge of the indentation knife 11 protrudes outward relative to the outer peripheral surface of the indentation knife seat 13.

[0027] The indentation knife 11 is fixedly installed on the first mounting shaft 1. The distance between every two adjacent indentations on a single bag body is adjusted by changing the rotation speed of the first mounting shaft 1.

[0028] Square-bottom paper bag machine, including a frame, on which an indentation mechanism and a cutting mechanism for paper bags are provided. The paper bags are processed from a roll of paper. The continuously conveyed uncut paper bags first pass through the indentation mechanism and then enter the cutting mechanism for cutting. The installation position of the indentation mechanism on the frame is lower than that of the cutting mechanism.

[0029] Working principle: The processing object is a paper bag, especially for the processing of square-bottom paper bags. The forming process of the present utility model is to continuously convey, fold the edges, and indent a roll of paper, and then perform cutting and folding of the bag bottom, and indent usually two or three grooves with the opening facing upwards. The same number of indentation knives 11 and elastic support rollers 21 cooperate with each other to indent the paper bag passing between the indentation knife 11 and the elastic support roller 21.

[0030] On the side of the first installation shaft 1, a first synchronous pulley 14 is provided. On the side of the second installation shaft 2, a second synchronous pulley 22 is provided. The first synchronous pulley 14 and the second synchronous pulley 22 are linked to make the linear speeds of the surfaces of the indentation knife seat 13 and the elastic support roller 21 equal. The first synchronous pulley 14 and the second synchronous pulley 22 can be connected by a belt, or both are gears and mesh with each other. One of the synchronous pulleys connected to the power source drives the synchronous pulley to rotate. The power source is a servo motor connected to the main control, which is convenient to accurately control the rotation speed of the synchronous pulley through the main control. The linear speeds of the first synchronous pulley 14 and the second synchronous pulley 22 are the same. If only two indentations are required, according to the distance between two adjacent indentations of each paper bag, the rotation rates of the first installation shaft 1 and the second installation shaft 2 rotating synchronously are adjusted to keep the distance between two adjacent indentation knives 11 unchanged, but the indentation distance on the paper bag can be adjusted according to the rotation speed. One adjustment method is that the first rate is from when the paper bag has not been indented to when the first indentation knife 11 passes on the paper bag, and the second rate is when the part between the two indentation knives 11 passes on the paper bag. Since the distance between the indentation knives is only a small part compared to the overall conveyance, this method basically does not affect the conveyance rate of the bag body and keeps the overall processing efficiency at the original level. Another adjustment method is to increase or decrease the overall conveyance speed to match the indentation distance. If three indentations are required, on the same paper bag, within the indentation range of the first two indentation knives 11 on the paper bag, the rotation rate of the first installation shaft 1 and the second installation shaft 2 is the second rate, and within the indentation range of the last two indentation knives 11 on the paper bag, the rotation rate of the first installation shaft 1 and the second installation shaft 2 is the third rate, and the first rate is from when the paper bag has not been indented to when the first indentation knife 11 passes on the paper bag. Thus, the adjustment is achieved without changing the installation distance of the indentation knives 11.

[0031] Embodiment 2

[0032] Same as Embodiment 1, the difference is that the distance between two indentations is adjusted by the distance between adjacent indentation knives 11 installed.

[0033] At least one indentation tool holder 13 can change its installation position along the outer periphery of the mounting disk 12, or the installation position of at least one indentation tool 11 on the indentation tool holder 13 can be adjusted back and forth and fixed, so as to adjust the distance between adjacent indentation tools 11.

[0034] A card slot for cooperating with the indentation tool holder 13 is provided on the outer periphery of the mounting disk 12, and the indentation tool holder 13 is fixed in the card slot. The mounting disk 12 can be provided with a circumferential scale disk for the staff to intuitively adjust the indentation tool holder 13. Another way is that a number of card slots are provided before and after the indentation tool holder 13 for the installation and spacing adjustment of the indentation tool 11. By adjusting the installation position, the indentation tool 11 can cooperate with the elastic support roller below to press indentations with different spacings on the passing paper bag.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0036] In summary, the above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope covered by the patent of the present invention.

Claims

1. A bag body creasing mechanism of a square bottom paper bag machine, comprising a correspondingly arranged mounting shaft 1 (1) and a mounting shaft 2 (2), wherein the mounting shaft 1 (1) and the mounting shaft 2 (2) can rotate in opposite directions and at least one of the two is connected to a power source for driving the rotation thereof, and an creasing knife (11) is axially arranged on the mounting shaft 1 (1), characterized in that: There are at least two creasing knives (11), and adjacent creasing knives (11) are arranged in parallel and at intervals. An elastic support roller (21) is installed on the second mounting shaft (2), and the position of the creasing knives (11) corresponds to the position of the elastic support roller (21). The power source drives the first mounting shaft (1) to rotate so that every two adjacent creasing knives (11) are pressed against the elastic support roller (21) in sequence, so as to produce two indentations on the paper bag passing between the first mounting shaft (1) and the second mounting shaft (2), and the spacing between the two indentations is adjusted by adjusting the rotation speed of the first mounting shaft (1) or / and the installation distance of the adjacent creasing knives (11).

2. The bag body creasing mechanism of a square bottom paper bag machine according to claim 1, characterized in that: The first mounting shaft (1) is located above the second mounting shaft (2), and the length of the elastic support roller (21) is not less than the length of the creasing knife (11).

3. The bag body creasing mechanism of a square bottom paper bag machine according to claim 1, characterized in that: An installation disk (12) is axially sleeved on the installation shaft (1), an indentation knife seat (13) is provided on the installation disk (12), an indentation knife (11) is arranged on the indentation knife seat (13), and a blade of the indentation knife (11) protrudes outward relative to the outer peripheral surface of the indentation knife seat (13).

4. The bag body creasing mechanism of a square bottom paper bag machine according to claim 3, characterized in that: The installation position of at least one creasing knife seat (13) can be changed along the outer circumference of the installation plate (12), or the installation position of at least one creasing knife (11) on the creasing knife seat (13) can be adjusted forward and backward and fixed, thereby adjusting the distance between adjacent creasing knives (11).

5. The bag body creasing mechanism of a square bottom paper bag machine according to claim 3, characterized in that: The indentation knife (11) is fixedly mounted on the mounting shaft (1), and the distance between every two adjacent indentations on a single bag body is adjusted by changing the rotation speed of the mounting shaft (1).

6. The bag body creasing mechanism of a square bottom paper bag machine according to claim 3, characterized in that: A synchronous wheel one (14) is arranged on the side of the mounting shaft one (1), and a synchronous wheel two (22) is arranged on the side of the mounting shaft two (2). The synchronous wheel one (14) and the synchronous wheel two (22) are linked to make the linear speeds of the surface of the indentation knife seat (13) and the surface of the elastic support roller (21) equal.

7. The bag body creasing mechanism of a square bottom paper bag machine according to claim 6, characterized in that: The synchronous wheel 1 (14) and the synchronous wheel 2 (22) are both gears, and the synchronous wheel 1 (14) and the synchronous wheel 2 (22) are meshed with each other.

8. A square bottom paper bag machine, comprising a frame, on which is disposed a creasing mechanism according to any one of claims 1 to 7, characterized in that: It also includes a cutting mechanism for paper bags. The paper bags are processed from roll paper. The continuously conveyed uncut paper bags first pass through the creasing mechanism and then enter the cutting mechanism for cutting. The installation position of the creasing mechanism on the frame is lower than the installation position of the cutting mechanism.

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