Suction device for the bottom-opening roller of a paper bag machine

Abstract

The present invention discloses an air suction device for the bottom-opening roller of a paper bag machine. It includes a main shaft having two air flow channels, an air distribution device installed at one end of the main shaft, a bag bottom air suction assembly installed in the middle of the main shaft, and a pair of bottom-opening roller air suction assemblies. Two swing arm driving devices are provided on the air distribution device, and cam adjusting devices for controlling the air suction and air release positions and cooperating with the respective swing arm driving devices are provided on the main shaft. The advantages are as follows: The swing arm driving device and the cam adjusting device are cleverly used to cooperate to adjust the air suction and air release times, so that the claw actions accurately bite, ensuring the running stability, the paper bag bottom opening is pulled open without misalignment actions, the reliability is good, and the production efficiency is greatly improved, effectively ensuring the production quality of the produced paper bags.

Description

Technical Field

[0001] The present invention relates to a packaging paper bag manufacturing device, and more particularly to a bottom-opening roller air suction device for a paper bag machine. Background Art

[0002] Currently, paper bag packaging is widely used in various fields, and the requirements for paper bags in various application scenarios are getting higher and higher. In particular, in most scenarios, specific requirements are put forward for the bottom forming of paper bags, such as no wrinkling and no bottom corner cracking. However, in the prior art, the production of paper bags mainly relies on high-speed paper bag machines. During high-speed production and when making wide-bottom paper bags, wrinkling and bottom cracking are relatively serious. The reason is that during the production process, the finger grasping actions of the paper bag machine are inaccurate, the bottom opening of the paper bag is not stable, with large variations, the bottom opening of the paper bag cannot be effectively opened, and there are misalignment and blockage phenomena. As a result, the production reliability is poor. These above problems seriously affect the quality and production efficiency of paper bags. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a bottom-opening roller air suction device for paper bags that has good running stability, accurate finger claw actions that can bite, the bottom opening of the paper bag can be opened, there is no misalignment action, good reliability, and high production efficiency, so as to ensure the quality of the produced paper bags.

[0004] To solve the above technical problems, the bottom-opening roller air suction device of the present invention includes a main shaft having two air flow channels, a gas distribution device installed at one end of the main shaft, a bottom suction assembly installed in the middle of the main shaft for sucking air from the middle of the bag bottom, and a pair of bottom-opening roller air suction assemblies installed in the middle of the main shaft on both sides of the bottom suction assembly for sucking air from the bottom opening of the two sides of the paper bag. Two swing arm driving devices are provided on the gas distribution device, and cam adjustment devices for controlling the air suction and air release positions are provided on the main shaft and are respectively matched with the swing arm driving devices. Through the cooperation of the swing arm driving devices and the cam adjustment devices, the gas distribution device can cooperate with the two air flow channels of the main shaft to distribute air to the bottom suction assembly and the bottom-opening roller air suction assemblies in the air suction device.

[0005] The gas distribution device includes a gas distribution seat installed on the main shaft through a bearing, two gas distribution holes provided on the gas distribution seat and respectively communicating with the two air flow channels, and valve core assemblies respectively installed in the two gas distribution holes. The swing arm driving device cooperates with the valve core assembly to push the valve core assembly to act, thereby enabling the control of the air suction and air release positions.

[0006] Each of the cam adjustment devices includes a fixed cam fixedly installed on the main shaft and an adjustment cam fixedly installed on the fixed cam through a fastener. By adjusting the circumferential position of the adjustment cam on the fixed cam, the arc length of the high point and the low point can be adjusted, thereby realizing the control of the air suction and air release positions.

[0007] The swing arm driving device includes a swing arm hinged on the air distribution seat, a roller mounted at one end of the swing arm through a roller shaft and pressing on the surfaces of a fixed cam and an adjusting cam, and a pressing component mounted at the other end of the swing arm and pressing on one end face of the valve core assembly. The other end of the valve core assembly is pressed against by a pressure regulating component mounted on the air distribution seat.

[0008] Two limit sleeves are arranged at both ends of the air distribution seat at the opening ends of the air distribution holes. The pressure regulating component includes a bracket mounted on the limit sleeve and a screw rotatably connected to the bracket and pressing on the valve core assembly and locked and fixed by a nut.

[0009] The valve core assembly includes a valve rod, a valve block arranged on the valve rod and located in the air distribution hole, and two placement cavities arranged at the end of the valve rod and provided with springs and balls. An air inlet channel communicating with the air distribution hole is also arranged on the air distribution seat.

[0010] An air inlet seat is mounted on the air distribution seat, and pipe joints are mounted on the air inlet seat and respectively communicate with the two air distribution holes through the air inlet channel. The pipe joints are connected to an external air pump through pipelines to provide the required air source.

[0011] An air release hole is arranged on one of the two limit sleeves in each air distribution hole.

[0012] After adopting the above structure, air distribution can be carried out through the air distribution device, and through the cooperation of the swing arm driving device and the cam adjusting device, the air distribution device can cooperate with the two air flow channels of the main shaft to carry out air distribution for the bag bottom air suction component and the bottom opening roller air suction component in the air suction device. In this process, the cooperation of the swing arm driving device and the cam adjusting device is skillfully used to adjust the air suction and air release time, so that the finger claws act accurately and bite, ensuring the running stability, the bottom opening of the paper bag is pulled open without misalignment action, the reliability is good, and the production efficiency is greatly improved, thus effectively ensuring the production quality of the paper bags. Description of the Drawings

[0013] Figure 1 is a three-dimensional structural schematic diagram of the bottom opening roller air suction device of the present invention;

[0014] Figure 2 is a sectional structural schematic diagram of the bottom opening roller air suction device of the present invention;

[0015] Figure 3 is Figure 2 an enlarged structural schematic diagram at A of

[0016] Figure 4 is a partial structural schematic diagram of the air distribution closing working principle in the present invention;

[0017] Figure 5This is a partial structural schematic diagram of the air intake working principle in the present invention. Specific Embodiment

[0018] The following further elaborates on the paper bag bottom-opening roller air intake device of the present invention in conjunction with the accompanying drawings and specific embodiments.

[0019] As shown in the figure, the paper bag bottom-opening roller air intake device of the present invention includes a main shaft 2 having two air flow channels 1, an air distribution device 3 installed at the left end of the main shaft, a gear 4 installed at the right end of the main shaft, a bag bottom air intake assembly 5 installed in the middle of the main shaft, and two bottom-opening roller air intake assemblies 6 located on both sides of the bag bottom air intake assembly 5. The main shaft 2 is installed on the wall panel through bearings and is driven to rotate by the power provided by the gear installed on the main shaft. A plug 26 is provided on the main shaft 2 to block the openings of the two air flow channels 1. In this embodiment, one of the air flow channels is defined as the first air flow channel, and the other air flow channel is defined as the second air flow channel. As can be seen from the figure, the first air flow channel and the second air flow channel are arranged in parallel along the axial direction of the main shaft 2. The first air flow channel communicates with the ventilation groove in the bag bottom air intake assembly 5, and the second air flow channel communicates with the ventilation grooves in the two bottom-opening roller air intake assemblies 6. The middle bag bottom is sucked by the bag bottom air intake assembly 5, and the two sides of the paper bag bottom-opening are sucked by the two bottom-opening roller air intake assemblies 6. The said air distribution device 3 includes an air distribution seat 9 installed on the main shaft 1 through bearings, two left and right air distribution holes ( Figure 1 The left side shown is defined as the left side, Figure 1 The right side shown is defined as the right side,), and valve core assemblies respectively installed in the two left and right air distribution holes. The left air distribution hole communicates with the first air flow channel among them, and the right air distribution hole communicates with the second air flow channel. Two left and right swing arm driving devices 7 are provided on the air distribution device 3, and two left and right cam adjusting devices 8 for controlling the air intake and exhaust positions are provided on the main shaft 1 and cooperate with the two left and right swing arm driving devices respectively. The left swing arm driving device 7 cooperates with the valve core assembly in the left air distribution hole, so as to push the valve core assembly to act under the action of the left cam adjusting device 8. The right swing arm driving device 7 cooperates with the valve core assembly in the right air distribution hole, so as to push the valve core assembly to act under the action of the right cam adjusting device 8, thereby enabling the control of the air intake and exhaust positions. Thus, through the cooperation of the swing arm driving device 7 and the cam adjusting device 8, the air distribution device 3 can cooperate with the two air flow channels of the main shaft 1 to selectively distribute air to the bag bottom air intake assembly 5 and the bottom-opening roller air intake assemblies 6 in the air intake device.

[0020] Furthermore, as Figure 4 、 Figure 5As shown, both of the two cam adjusting devices 8 include a fixed cam 10 fixedly mounted on the main shaft 2 and an adjusting cam 11 fixedly mounted on the fixed cam by fasteners. By adjusting the circumferential position of the adjusting cam 11 on the fixed cam 10, the arc lengths of the high points and low points of the contour are adjusted, so as to control the intake and exhaust positions. Both of the two swing arm driving devices 7 include a swing arm 12 hinged to the valve distribution seat 9 by a pin shaft 28, a roller 13 mounted at the upper end of the swing arm through a roller shaft and used to press on the surfaces of the fixed cam 10 and the adjusting cam 11, and a pressing component 14 mounted at the lower end of the swing arm and used to press on one side end face of the corresponding valve core assembly. Among them, each pressing component 14 includes a pressing bolt screwed at the lower end of the swing arm and a positioning nut. The other end of each said valve core assembly is pressed against by a corresponding pressure regulating component 15 mounted on the valve distribution seat 9. On the front and rear end faces of the said valve distribution seat 9, there are two limiting sleeves respectively located at the front and rear open ends of the left side air distribution hole ( Figure 1 shown orientation) and two limiting sleeves respectively located at the front and rear open ends of the right side air distribution hole ( Figure 1 shown orientation). A gas distribution channel is formed between the two limiting sleeves. Each said pressure regulating component 15 includes two brackets 27 respectively mounted on the two limiting sleeves 16 and pressing screws 18 respectively screwed on the two brackets and used to press on the valve core assembly and locked and fixed by locking nuts 17 respectively. The valve core assembly can be pressed by the pressing screws 18.

[0021] Furthermore, the said valve core assembly includes a valve stem 19, a valve block 20 arranged on the valve stem and located in the air distribution hole, and left and right two placement cavities arranged at the left and right ends of the valve stem ( Figure 4 the left and right directions shown are defined as the left and right ends of the valve stem). A set of compression springs 21 and steel balls 22 are respectively arranged in the left and right two placement cavities. Figure 4 For example, the pressure of the compression spring on the left side is greater than the pressure of the compression spring on the right side, so that the valve stem 19 and the valve block 20 are located in the air distribution hole, the pressing screw 18 in the pressure regulating component 15 presses on the steel ball in the right placement cavity, and at the same time the pressing bolt in the pressing component 14 presses on the steel ball in the left placement cavity. By adjusting the pressure of the pressing screw 18 pressing on the compression spring 21 and the steel ball 22 in the right placement cavity and locking with the locking nut 17, the pressure adjustment is realized. In addition, in order to realize air intake, an air intake channel 23 communicating with the air distribution hole is further arranged on the valve distribution seat 9. An air intake seat 24 is mounted on the valve distribution seat 9. Pipe joints 25 respectively communicating with the two air distribution holes through the air intake channel 23 are mounted on the air intake seat 24. The pipe joints 25 are connected to an external air pump through pipelines to provide the required air source.

[0022] Taking the gas distribution of one of the gas distribution units as an example, since the swing arm 12 can swing on the gas distribution seat 9 with the pin shaft 28 as the center of the circle, the roller 13 installed on the upper end of the swing arm through the roller shaft presses on the contour surfaces of the fixed cam 10 and the adjusting cam 11, and the pressing bolt installed at the lower end of the swing arm and locked by the positioning nut presses against the steel ball, as Figure 5 shown, when the high point of the cam contour pushes the roller 13, the swing arm 12 swings with the pin shaft 28 as the center of the circle, presses the steel ball through the pressing bolt (at this time the compression spring is compressed) and pushes the valve stem to move. Since the valve block is pushed to the right ( Figure 5 shown orientation), the intake passage 23 communicates with one of the intake passages through the gas distribution hole, realizing air intake. That is, the left end face of the valve block leaves the end face of the left limit sleeve, opening the gas distribution passage, allowing the gas in the intake passage 23 to enter one of the intake passages. The right end face of the valve block contacts the end face of the right limit sleeve, closing the air release hole of the right limit sleeve (as Figure 5 shown, there is an air release hole designed on the right limit sleeve), as Figure 4 shown, when it enters the low point of the cam contour, the valve block resets under the action of the compression spring on the right side. The end face of the valve block contacts the end face of the left limit sleeve. At this time, due to the blockage of the valve block, the gas distribution passage is closed, and the remaining gas in the air flow passage in the main shaft is discharged through the air release hole on the right limit sleeve to ensure accurate air release at the air intake paper bag.

Claims

1. An air suction device for the bottom-opening roller of a paper bag machine, characterized in that: It includes a main shaft (2) having two air flow channels (1), a gas distribution device (3) installed at one end of the main shaft, a bottom suction assembly (5) for sucking the bottom of the middle bag installed in the middle of the main shaft (2), and a pair of bottom opening roller suction assemblies (6) installed in the middle of the main shaft (2) and located on both sides of the bottom suction assembly (5) for sucking the bottom opening of the two side paper bags. Two swing arm driving devices (7) are provided on the gas distribution device (3), and cam adjusting devices (8) for controlling the suction and deflation positions and respectively cooperating with each of the swing arm driving devices are provided on the main shaft (2). Through the cooperation of the swing arm driving device (7) and the cam adjusting device (8), the gas distribution device (3) can cooperate with the two air flow channels of the main shaft (2) to distribute gas to the bottom suction assembly (5) and the bottom opening roller suction assembly (6) in the suction device; The gas distribution device (3) includes a gas distribution seat (9) installed on the main shaft (2) through a bearing, two gas distribution holes provided on the gas distribution seat and respectively communicating with the two air flow channels (1), and valve core assemblies respectively installed in the two gas distribution holes. The swing arm driving device (7) cooperates with the valve core assembly to push the valve core assembly to act, so as to realize the control of the suction and deflation positions; each of the cam adjusting devices (8) includes a fixed cam (10) fixedly installed on the main shaft (2) and an adjusting cam (11) fixedly installed on the fixed cam through a fastener. By adjusting the arc length of the high point and the low point through the circumferential position of the adjusting cam (11) on the fixed cam (10), the control of the suction and deflation positions is realized; the swing arm driving device (7) includes a swing arm (12) hinged on the gas distribution seat (9), a roller (13) installed at one end of the swing arm through a roller shaft and used for pressing on the surfaces of the fixed cam (10) and the adjusting cam (11), and a pressing assembly (14) installed at the other end of the swing arm and used for pressing on one end face of the valve core assembly. The other end of the valve core assembly is pressed against by a pressure regulating assembly (15) installed on the gas distribution seat (9).

2. The bottom-opening roller suction device of the paper bag machine according to claim 1, wherein: Two limit sleeves (16) at the opening ends of each gas distribution hole are provided at both ends of the gas distribution seat (9). The pressure regulating assembly (15) includes a bracket installed on the limit sleeve (16) and a screw (18) screwed on the bracket and used for pressing the valve core assembly and locked and fixed by a nut (17).

3. The bottom-opening roller air suction device of the paper bag machine according to claim 2, characterized in that: The valve core assembly includes a valve stem (19), a valve block (20) provided on the valve stem and located in the gas distribution hole, and two placement cavities provided at the end of the valve stem and containing a spring (21) and a ball (22). An air inlet channel (23) communicating with the gas distribution hole is also provided on the gas distribution seat (9).

4. The bottom-opening roller air suction device of the paper bag machine according to claim 3, characterized in that: An air inlet seat (24) is installed on the gas distribution seat (9), and pipe joints (25) respectively communicating with the two gas distribution holes through the air inlet channel (23) are installed on the air inlet seat (24). The pipe joints (25) are connected to an external air pump through pipelines to provide the required air source.

5. The bottom-opening roller air suction device of the paper bag machine according to claim 4, characterized in that: An air release hole is provided on one of the limit sleeves in each gas distribution hole.

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