Speed-regulating handle sticking mechanism of bag making machine

Abstract

The utility model relates to the field of packaging machinery, and discloses a speed regulation handle sticking mechanism of a bag making machine, which comprises a handle conveying line used for handle forming, and a bag strip discharging mechanism and a handle forming mechanism are sequentially arranged on the handle conveying line along the handle forming direction. The handle pasting mechanism is used for pasting handles on the two bag faces of the formed bag body. The handle pasting device comprises a control device, a first handle conveying roller, a speed sensing device, a cutter roller and a handle pasting component. The linear speeds of the cutter roller and the handle pasting component are the same S2; the speed sensing device senses the conveying speed of a handle sent out by the first handle conveying roller and transmits a speed signal to the control device, and the control device controls the linear speed S1 of the first handle conveying roller to be consistent with the linear speed S2 of the cutter roller. According to the utility model, the handle sticking position is ensured to be positioned in the center of the bag body through transverse centering control, the accuracy and consistency of the handle sticking position are improved, the handle is ensured to be positioned in the center of the bag body in the width direction, and the balance of the bag body during bearing is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of packaging machinery, and in particular to a speed-adjustable attaching mechanism for a bag-making machine. Background Technology

[0002] The existing paper bag production line's handle-attaching mechanism lacks an effective speed feedback control mechanism, especially in terms of lateral handle positioning. Current equipment struggles to ensure the handle accurately adheres to the center of the bag, affecting product aesthetics and load-bearing balance. Existing technologies typically involve machining a positioning hole in the handle itself during transport, and then using a mechanism on the machine to insert into this hole to position the handle forward and backward. For example, Chinese utility model patent CN207579218U, "A Handle Cutting and Positioning Device on a Handle Forming Machine," describes this approach. Figure 2 As shown, the bag handle has handle positioning holes. As described in section 0017 of the instruction manual: the handle to be cut is conveyed to the handle positioning roller via two guide rollers. The handle grip is engaged in the handle grip groove, and each handle pressure roller presses the handle tightly against the handle positioning roller. When the handle to be cut is wrapped around the handle positioning roller, the handle positioning pin is lifted by the action of the cam and engaged into the positioning hole of the handle to be cut. The guide roller rotates, and when the handle to be cut leaves the handle positioning roller, each handle positioning pin retracts into the handle positioning roller under the combined action of the compression spring and the cam. Since the spacing between the handle positioning holes and the spacing between each handle positioning pin are equal, each handle positioning pin will accurately engage into each handle positioning hole in sequence. The distance between the handle positioning roller and the cutting blade remains constant, and the transmission is constant. In this way, the handle to be cut, positioned by the handle positioning roller, will be accurately cut by the cutting blade. The size of each handle, the distance of the handle from the cutting edge, and the distance of each positioning hole will remain constant. This positioning method results in unsightly holes in the handle, and sometimes if the positioning structure is offset from the center of the positioning hole, it can easily puncture the handle during rotation and positioning.

[0003] Secondly, the conveyor speed transition is not smooth when the bag is transferred from the square bottom forming mechanism to the handle attaching mechanism. If the output speed of the square bottom forming mechanism does not match the input speed of the handle attaching mechanism, it can easily cause bag deformation or seal damage.

[0004] Therefore, there is an urgent need for a speed-adjustable bag-making machine with a handle-attaching mechanism, and to solve the technical problem of connecting the two speeds. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a speed-adjustable handle applicator for a bag-making machine.

[0006] To solve the above-mentioned technical problems, this utility model achieves its solution through the following technical solution:

[0007] A speed-regulating handle-attaching mechanism for a bag-making machine includes a handle conveyor line for handle forming, wherein a bag strip feeding mechanism and a handle forming mechanism are sequentially arranged along the handle forming direction on the handle conveyor line.

[0008] The handle attaching mechanism is used to attach handles to both sides of the formed bag body. The handle attaching mechanism includes a bag body conveying turntable and a handle attaching device. The bag body conveying turntable is mounted on the mounting frame. The bag body conveying turntable is circumferentially provided with a first handle attaching station and a second handle attaching station. The bag body conveying turntable is provided with bag body conveying components. The handle attaching mechanism is provided with at least two sets of handle attaching devices. The handle attaching devices are conveyed and connected to the handle forming mechanism. The handle formed by the handle forming mechanism is attached to the bag opening position of the first handle attaching station and the second handle attaching station respectively through the handle attaching devices.

[0009] Each handle-attaching device includes a control unit, and also includes a first handle conveying roller, a speed sensor, a cutting roller, and an attaching component arranged sequentially along the handle conveying direction. The linear velocity of the cutting roller and the attaching component is the same, S2. The speed sensor senses the conveying speed of the handle delivered by the first handle conveying roller and transmits the speed signal to the control unit. The control unit controls the linear velocity S1 of the first handle conveying roller to be consistent with the linear velocity S2 of the cutting roller. Simultaneously, when the handle is conveyed laterally and continuously passed through the first handle conveying roller and the cutting roller and attached by the attaching component, its lateral position corresponds to the center position of the formed bag body. By setting the speed sensor to monitor the handle conveying speed of the first handle conveying roller in real time, and by controlling the first linear velocity S1 to be consistent with the second linear velocity S2 of the cutting roller, the speed fluctuation of the handle during the conveying process is effectively eliminated. Since the handle is always at a stable speed when the cutting roller cuts the handle, the speed compensation is effectively performed by adjusting the linear velocity S1 of the first handle conveying roller, so that the time interval between two adjacent handles is consistent with the cutting roller and the attaching component, avoiding errors in handle cutting length or attaching position caused by speed mismatch. Meanwhile, the control device ensures that the handle's lateral position always corresponds to the center of the formed bag body during the lateral conveying process, passing through the first handle conveying roller, the cutting roller, and finally to the handle-attaching component. This achieves precise lateral centering of the handle, ensuring that the handle-attaching position is centered in the width direction of the bag, improving the product's aesthetics and balance under load. By matching the linear speed D2 of the bag conveying component and the bag exit conveying component with the linear speed S2 of the handle-attaching component, and unifying four key time intervals, precise synchronization between bag conveying and handle attachment is achieved. This ensures that when each bag arrives at the handle-attaching station, the corresponding handle has just been cut and is ready for attachment, significantly improving the accuracy of the handle-attaching position and production continuity.

[0010] Preferably, the time interval for the handle forming mechanism to output a unit handle is matched with the time interval for the bag conveying component on the handle attaching mechanism to convey the bag, both being T1. The conveying speed S1 of the handle forming mechanism outputting the handle is adapted to the conveying speed of the bag outputting the square bottom forming mechanism, making T1 equal. This allows the bag to be directly attached to the handle attaching mechanism without stopping after entering, eliminating waiting time and further improving efficiency. The matching method can be complete speed matching, or the handle attaching mechanism can be set to have an idle stroke to adapt to the linear speed of the discharge conveying component. The purpose is to keep the quantity and speed of the bag and handle output in sync, achieving complete rhythm matching between the bag forming line and the handle forming line, ensuring that the equipment maintains a strict synchronization relationship even when running at high speed.

[0011] Preferably, the handle-attaching component has material-supporting components corresponding to the first and second handle-attaching stations. The material-supporting components and the handle-attaching components are located on both sides of the bag opening. The handle-attaching component rotates and presses the single handle onto the bag opening on the material-supporting component. By setting the material-supporting components at the handle-attaching stations and positioning them on both sides of the bag opening, the rotation of the handle-attaching component presses the single handle onto the bag opening on the material-supporting component, a stable support platform is provided for the bag opening, preventing deformation or displacement of the bag opening during the attaching process, and improving the strength and appearance quality of the handle.

[0012] Preferably, when the bag body is located at the first and second attaching stations, the bag opening extends outside the bag body conveyor turntable and the bag opening orientation is rotated at least 90°.

[0013] Preferably, a limiting element is arranged circumferentially on the outer surface of the bag conveying turntable. The limiting element contacts the outer surface of the bag to keep the bag pressed against the outer surface of the bag conveying turntable. The bag conveying turntable rotates under the drive of a rotational power source or / and the limiting element drives the bag to move, so that the bag is conveyed along the bag conveying turntable in a clockwise or counterclockwise direction.

[0014] Preferably, the bag conveying component is a bag conveying turntable or a limiting device. The bag body rotates more than 90° on the conveying turntable, allowing the handles to be applied to both sides of the bag separately. This saves floor space compared to flipping the bag over and facilitates double-sided handle application. Two independent handle application devices operate at two different workstations, completing double-sided application within the same turntable cycle, significantly improving efficiency. The limiting device, combined with the bag conveying turntable, allows the bag opening to be suspended, while the main body of the bag bottom is attached to the bag conveying turntable. The bag body can stably enter the first and second handle application workstations sequentially for application without interference from other mechanisms. After the handles are applied, the bag body is formed, and the handle will not affect other processes.

[0015] Preferably, the speed sensing device is a photoelectric sensor or a vision sensor, which senses the handle conveying speed by sensing the same handle position or the edge position of the strip on the front and rear handles.

[0016] Preferably, the handle-attaching device also includes a storage wheel, which is slidably mounted on a guide rail via a slider. The continuously conveyed handle passes through the storage wheel and then through a first handle conveying roller. When the speed of the first handle conveying roller changes, causing a speed difference in the output speed of the handle forming mechanism, the slider adjusts the distance between the storage wheel and the first handle conveying roller by raising and lowering. This change in speed effectively buffers the impact of speed fluctuations on handle tension, preventing excessive stretching or slack wrinkling of the handle, and ensuring the stability of continuous handle conveying and the accuracy of the cutting length.

[0017] This utility model, by adopting the above technical solution, has significant technical effects:

[0018] This invention solves the problem in existing bag-making machines where punching holes in the handle during bag forming is necessary to ensure the lateral alignment of the handle. Closed-loop control ensures the stability of the handle conveying speed, and lateral alignment control ensures the handle is centered on the bag body, improving the accuracy and consistency of the handle placement. It also ensures the handle is centered in the bag's width direction, enhancing the bag's balance under load. This effectively buffers the impact of speed fluctuations in the front-end handle forming process on the material, resulting in a higher yield, improved production speed and equipment stability. There is no risk of damaging the handle or bag body, making it more suitable for high-speed automated production. Attached Figure Description

[0019] Figure 1 This is a top view of the present invention;

[0020] Figure 2 This is a structural diagram of the handle attachment mechanism;

[0021] Figure 3 yes Figure 1 A structural diagram from another angle.

[0022] The parts referred to by the numbers in the above attached figures are as follows: 200, handle conveyor line; 210, bag strip feeding mechanism; 220, handle forming mechanism; 900, handle attaching mechanism; 910, mounting frame; 920, bag body conveying turntable; 930, limiting component; 940, handle attaching device; 941, material support component; 942, handle attaching component; 943, cutting roller; 944, control device; 945, first handle conveying roller; 946, speed sensing device; 947, storage wheel; 948, slider; 949, guide rail. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] A speed-regulating adhesive bag making machine, such as Figure 1-2 As shown, it includes a handle conveyor line 200 for handle forming, and a bag strip feeding mechanism 210 and a handle forming mechanism 220 are sequentially arranged on the handle conveyor line 200 along the handle forming direction.

[0026] like Figure 3 As shown, the handle attaching mechanism 900 is used to attach handles to both sides of the formed bag body. The handle attaching mechanism 900 includes a bag body conveying turntable 920 and a handle attaching device 940. The bag body conveying turntable 920 is mounted on the mounting frame 910. The bag body conveying turntable 920 is circumferentially provided with a first handle attaching station and a second handle attaching station. The bag body conveying turntable 920 is provided with a bag body conveying component. The handle attaching mechanism 900 is provided with at least two sets of handle attaching devices 940. The handle attaching devices 940 are conveyed and connected to the handle forming mechanism 220. The handle formed by the handle forming mechanism 220 is attached to the bag opening position of the first handle attaching station and the second handle attaching station by the handle attaching devices 940 respectively.

[0027] like Figure 1 As shown, each set of handle attaching devices 940 includes a control device 944, and also includes a first handle conveying roller 945, a speed sensing device 946, a cutting roller 943, and a handle attaching component 942 arranged sequentially along the handle conveying direction; the linear speed of the cutting roller 943 and the handle attaching component 942 is the same as S2; the speed sensing device 946 senses the conveying speed of the handle delivered by the first handle conveying roller 945 and transmits the speed signal to the control device 944, and the control device 944 controls the linear speed S1 of the first handle conveying roller 945 to be consistent with the linear speed S2 of the cutting roller 943, and at the same time, when the handle is conveyed laterally and continuously conveyed through the first handle conveying roller 945 and the cutting roller 943 and attached by the handle attaching component 942, its lateral position corresponds to the center position of the formed bag body.

[0028] The time interval between the output handle of the handle forming mechanism 220 and the time interval between the bag conveying component of the handle attaching mechanism 900 are matched, both being T1. The conveying speed S1 of the output handle of the handle forming mechanism 220 is adapted to the conveying speed D1 of the output bag of the bag making process so that T1 is equal.

[0029] The attaching component 942 is provided with a material support component 941 at the first attaching station and the second attaching station respectively. The material support component 941 and the attaching component 942 are located on both sides of the bag opening. The attaching component 942 rotates and presses the single handle onto the bag opening on the material support component 941.

[0030] When the bag is located at the first and second attaching stations, the bag opening extends beyond the bag conveyor turntable 920 and the bag opening orientation has rotated at least 90°. A limiting member 930 is arranged circumferentially on the outer surface of the bag conveyor turntable 920. The limiting member 930 contacts the outer surface of the bag to keep the bag pressed against the outer surface of the bag conveyor turntable 920. The bag conveyor turntable 920 rotates under the drive of a rotary power source and / or the limiting member 930 drives the bag to move, so that the bag is conveyed along the bag conveyor turntable 920 in a clockwise or counterclockwise direction. The bag conveying component is the bag conveyor turntable 920 or the limiting member 930.

[0031] The speed sensing device 946 is a photoelectric sensor or a vision sensor that senses the handle conveying speed by sensing the same handle position or the edge position of the strip on the front and rear handles.

[0032] The handle attaching device 940 also includes a storage roller 947, which is slidably mounted on a guide rail 949 via a slider 948. The continuously conveyed handle passes through the storage roller 947 and then through a first handle conveying roller 945. When the speed of the first handle conveying roller 945 changes, causing a speed difference in the discharge speed of the handle forming mechanism 220, the slider 948 adjusts the distance between the storage roller 947 and the first handle conveying roller 945 by raising and lowering. The slider 948 can be actively adjusted by connecting to a lifting power source, which is connected to a control device 944. Alternatively, it can be passively adjusted based on the handle conveying speed, but this adjustment is not possible when the handle conveying tension decreases.

[0033] Working principle: The paper roll undergoes accordion folding, creasing, bottom opening, and bag forming operations, finally producing a complete bag body. The bag handle conveyor preceding the handle attaching mechanism delivers the formed continuous bag handles to the handle attaching mechanism 900. During operation, the handle conveyor line 200 is used for handle forming, and along the handle forming direction, it is sequentially equipped with a bag strip feeding mechanism 210 and a handle forming mechanism 220. The bag strip feeding mechanism 210 releases the handle material, and the handle forming mechanism 220 cuts, folds, or glues the handle material to form a handle of a predetermined shape. The bag body forming conveyor line and the handle conveyor line 200 intersect at the handle attaching mechanism 900.

[0034] The bag conveyor turntable 920 rotates until the bag reaches the attachment position that mates with the material support component 941. The bag opening is precisely between the material support component 941 and the attachment component 942. As the attachment component 942 rotates upward, it attracts the attachment. The attachment component 942 continues to descend with a slight angle to complete the attachment, and simultaneously or before this, the negative pressure attraction is released. The bag sequentially passes through the first attachment station and the second attachment station. The attachment components 942 at the first and second attachment stations respectively attach the attachment to both sides of the bag opening. The bag flips on the surface of the bag conveyor turntable 920. Since the bag opening rotates at least 90°, it is preferable that the attachment components 942 of both attachment devices are located above or diagonally above the material support component 941. When attaching the bag handle, the bag handle is diagonally above or above the bag, which facilitates attachment to the surface of the bag opening. Finally, after passing through two stations, the bag is sent out from the bag discharge outlet and detached from the bag conveyor turntable 920, and sent to the subsequent collection or packaging process.

[0035] The cutting roller 943 and the handle attaching component 942 share the same second linear velocity S2. The speed sensing device 946, which can be a photoelectric sensor or a vision sensor, senses the handle conveying speed by detecting the same handle position or the edge position of the adhesive strip on both handles and transmits the speed signal to the control device 944. Based on the received speed signal, the control device 944 controls the first linear velocity S1 of the first handle conveying roller 945 to maintain consistency with the second linear velocity S2 of the cutting roller 943 through frequency conversion speed regulation or servo control. Simultaneously, the control device 944 adjusts the cutting position of the cutting roller by adjusting the speed of the first handle conveying roller 945, ensuring that during the lateral conveying process, as the handle sequentially passes through the first handle conveying roller 945 and the cutting roller 943 and is attached by the handle attaching component 942, its lateral position corresponds to the center position of the formed bag body, achieving precise lateral centering.

[0036] Simultaneously, the handle forming mechanism 220 outputs handles at a conveying speed S1 adapted to D1, with a time interval of T1 for each handle output. After being buffered by the storage wheel 947, the handle is conveyed by the first handle conveying roller 945. The speed sensor 946 monitors the actual conveying speed of the handle in real time, and the control device 944 adjusts the rotation speed of the first handle conveying roller 945 according to the feedback signal, so that its first linear speed S1 is consistent with the second linear speed S2 of the cutter roller 943. At the same time, the control device 944 ensures that the handle is aligned with the center of the bag body in the lateral position. The cutter roller 943 rotates at a linear speed S2, with a time interval of T1 for each bag handle cut. Since the linear speed of the bag body conveying component matches the linear speed S2 of the handle attaching component 942, and the time interval of the handle attaching action of the handle attaching component 942 is also T1, when the bag body reaches the handle attaching station, the handle attaching component 942 precisely presses the handle cut by the cutter roller 943 onto the center of the bag opening, achieving precise synchronous handle attaching and lateral centering.

[0037] The bag making machine's control system coordinates the rotation, start and stop, cutting timing, and negative pressure switching of the bag conveyor turntable 920 to ensure strict synchronization of each workstation.

[0038] In the description of this utility model, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A speed-adjusting taping mechanism of a bag making machine, characterized by: The handle forming device comprises a handle conveying line (200) for handle forming, and a bag strip feeding mechanism (210) and a handle forming mechanism (220) are sequentially arranged on the handle conveying line (200) along a handle forming direction. The handle forming device further comprises a handle pasting mechanism (900) for pasting handles on two bag surfaces of a formed bag body, and the handle pasting mechanism (900) comprises a bag body conveying turntable (920) installed on a mounting frame (910), wherein the bag body conveying turntable (920) is circumferentially provided with a first handle pasting station and a second handle pasting station, and the bag body conveying turntable (920) is provided with a bag body conveying component; a handle pasting device (940), and at least two groups of handle pasting devices (940) are arranged on the handle pasting mechanism (900), the handle pasting devices (940) are connected with the handle forming mechanism (220) in conveying, and the handle forming mechanism (220) forms a handle which is pasted to a bag opening position of a bag body at the first handle pasting station and the second handle pasting station through the handle pasting devices (940) respectively; each group of handle pasting devices (940) comprises a control device (944), and further comprises a first handle conveying roller (945), a speed sensing device (946), a cutter roller (943) and a handle pasting component (942) which are sequentially arranged along a handle conveying direction; the cutter roller (943) has the same linear speed S2 as the handle pasting component (942); the speed sensing device (946) senses a conveying speed of the handle sent out by the first handle conveying roller (945) and transmits a speed signal to the control device (944), the control device (944) controls the linear speed S1 of the first handle conveying roller (945) to be consistent with the linear speed S2 of the cutter roller (943), and simultaneously makes the handle be conveyed in a transverse direction to sequentially and continuously pass through the first handle conveying roller (945), the cutter roller (943) and be pasted by the handle pasting component (942), and a transverse position of the handle corresponds to a central position of the formed bag body.

2. The speed-adjusting and sticking mechanism of a bag making machine according to claim 1, characterized in that: The interval time of the handle output by the handle forming mechanism (220) per unit handle is matched with the interval time of the bag body conveyed by the bag body conveying component on the handle pasting mechanism (900), and both are T1.

3. The speed-adjustable bag sticking mechanism of a bag making machine according to claim 1, characterized in that: the handle pasting component (942) is correspondingly provided with a material supporting component (941) at the first handle pasting station and the second handle pasting station, the material supporting component (941) and the handle pasting component (942) are located on two sides of the bag opening, the handle pasting component (942) rotates and presses a single handle to be combined at the bag opening of the material supporting component (941).

4. The speed-adjustable bag sticking mechanism of a bag making machine according to claim 1, characterized in that: When the bag body is located at the first handle pasting station and the second handle pasting station, the bag opening extends out of the bag body conveying turntable (920) and is at least turned by 90°.

5. The speed-adjustable bag sticking mechanism of a bag making machine according to claim 4, characterized in that: a limiting member (930) is arranged on an outer surface of the bag body conveying turntable (920) in a circumferential direction, the limiting member (930) contacts an outer side surface of the bag body to make the bag body be pressed and combined on the outer surface of the bag body conveying turntable (920), the bag body conveying turntable (920) rotates under the driving of a rotating power source or / and the limiting member (930) drives the bag body to move, so that the bag body is conveyed along the bag body conveying turntable (920) in a clockwise direction or an anticlockwise direction.

6. A speed-adjustable taping mechanism of a bag making machine according to claim 5, characterized in that: the bag body conveying component is the bag body conveying turntable (920) or the limiting member (930).

7. The speed-adjustable taping mechanism of a bag making machine according to claim 1, characterized in that: The speed sensing device (946) is an optical sensor or a visual sensor, which senses the same handle position or the edge position of the strip before and after the sensing to sense the conveying speed of the handle.

8. The speed-adjustable bag sticking mechanism of a bag making machine according to claim 1, characterized in that: The handle pasting device (940) further comprises a storage wheel (947) which is arranged on a guide rail (949) through sliding and lifting of a sliding block (948), and the continuously conveyed handle passes through the storage wheel (947) and then passes through the first handle conveying roller (945). When the speed of the first handle conveying roller (945) changes to cause a speed difference of the discharging speed of the handle forming mechanism (220), the sliding block (948) adjusts the distance between the storage wheel (947) and the first handle conveying roller (945) through lifting.

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