Plastic bag strapping machine with detection mechanism

Abstract

The utility model discloses a plastic bag strapping machine and a detection mechanism, which comprise a rack, a beak knotter, a winding device and a fixing device, and are characterized in that the winding device comprises a winding rod, a transverse driving mechanism and a longitudinal driving mechanism, and the winding rod is connected to an up-down driving mechanism and the transverse driving mechanism; and a photoelectric sensor is also arranged on the supporting plate or at a position corresponding to the supporting plate up and down. When a plastic bag is conveyed to the supporting plate, the photoelectric sensor can detect the existence of the plastic bag and provide a switching signal for the control system to start the winding device, and when the plastic bag placed on the supporting plate is irregular and ultra-wide, the photoelectric sensor can also detect the existence of the ultra-wide part. And a switching signal is provided for the control system to stop the winding device.

Description

TECHNICAL FIELD

[0001] The utility model relates to a plastic bag bundling machine with detection mechanism. BACKGROUND

[0002] The utility model relates to a plastic bag bundling machine that uses a bundling rope to bundle up folded plastic bags.

[0003] A utility model patent with the authorization announcement number CN221719031U discloses a knotting type plastic bag folding and bundling machine, which comprises a rack, a folding device and a beak knotter. An invention patent with the application publication number CN117885950A discloses a plastic bag packaging and bundling device, and the bundling knotting mechanism mainly comprises a knotting conveying rod and a knotting machine core, a feeding and bag pressing plate and a feeding platform. The above-mentioned existing design realizes the automation of plastic bag bundling, but the following problems may occur when bundling plastic bags: first, the folding machine folds plastic bags and then conveys them to the working position of the bundling machine through the conveying device, then winds the bundling rope on the middle position of the plastic bags, and then knots them through the beak knotter, thereby completing the bundling of the plastic bags. However, the plastic bags often have an empty load phenomenon during the bag making process of the bag making machine, i.e. no plastic film is used to make bags, so there is no plastic bag between the supporting plate and the pressing plate of the bundling machine. If the winding and bundling are performed according to the normal working procedure, the bundling rope will be wound on the beak knotter, which will prevent the following procedures from being performed. Second, even if the bag making machine can normally produce plastic bags, the plastic bags may be folded irregularly during the folding process, such as not being folded well or being unfolded after being folded. The width of the irregularly folded plastic bags is obviously wider than that of the normally folded plastic bags, which may cause two problems in the folding process. First, the winding rod may be blocked by the super-wide part of the plastic bags when it moves downward, which prevents the winding process from continuing. Second, the bundling rope released by the winding device may be entangled with the super-wide part of the plastic bags, which is difficult to separate. SUMMARY

[0004] To solve the problems in the prior art, the utility model provides a plastic bag bundling machine with a detection mechanism by setting a detection mechanism on the rack position corresponding to the supporting plate or the winding rod and controlling the start and stop of the bundling machine.

[0005] In order to realize the above technical purpose, the technical scheme of the utility model is: a plastic bag bundling machine with a detection mechanism, including frame, bird beak knotter, winding device, fixing device, its characterized in be: the fixing device includes supporting plate, pressing plate, pressing plate pneumatic cylinder, the pressing plate is connected on the pressing plate pneumatic cylinder, and the pressing plate is up and down corresponding with the supporting plate, the winding mechanism includes winding rod, transverse drive mechanism, longitudinal drive mechanism, and the winding rod is connected on the up and down drive mechanism and transverse drive mechanism, and the photoelectric sensor is still provided on the supporting plate or in the position corresponding with the supporting plate up and down.

[0006] The winding rod is driven by the transverse drive mechanism and the longitudinal drive mechanism to make the bundling rope wind between the bird beak knotter and the plastic bag into an oval shape, so as to enclose the plastic bag into a bound state.

[0007] As a preferred technical scheme, the winding rod is a guide rail, and a rope passing mouth is arranged at the lower end of the guide rail.

[0008] As a preferred technical scheme, the transverse drive mechanism includes a transverse pneumatic cylinder, a transverse guide rail and a transverse sliding block.

[0009] As a preferred technical scheme, the longitudinal drive mechanism includes a longitudinal pneumatic cylinder, a longitudinal guide rail and a longitudinal sliding block, and the rope passing mouth is arranged at the lower end of the longitudinal guide rail to form the winding rod.

[0010] As a preferred technical scheme, the winding rod is further provided with a rope passing mouth.

[0011] The photoelectric sensor is a photoelectric switch, which is a detection mechanism for detecting the presence or absence of an object by blocking or reflecting a light beam and turning on a circuit by a synchronous circuit.

[0012] The photoelectric sensor has multiple embodiments: the photoelectric sensor can be arranged in one or two. When one photoelectric sensor is arranged, it can only detect whether the plastic bag exists, i.e. whether the plastic bag is on the supporting plate, for controlling the start of the bundling work; when two photoelectric sensors are arranged, they can be arranged on the supporting plate or the rack corresponding to the upper and lower positions of the supporting plate, one of the photoelectric sensors is arranged at a position corresponding to the position of the plastic bag for detecting whether the plastic bag exists, and the other photoelectric sensor is arranged at a position corresponding to one side of the plastic bag. When the plastic bag is scattered or the shape of the plastic bag is abnormal, the width of the plastic bag is wider than that of the normal plastic bag, the photoelectric sensor can detect the over-wide part or the scattered part of the plastic bag, so as to identify whether the shape of the plastic bag is normal. If the shape of the plastic bag is abnormal, the winding device can be controlled to stop working, and the machine can be started again after the abnormally folded plastic bag is manually removed; the third mode is that the photoelectric sensor is arranged on a moving mechanism, and after the plastic bag is detected at one position, the moving mechanism moves to another position for detection.

[0013] As a preferred technical solution, the photoelectric sensor is arranged on the winding mechanism. This design can detect two positions on the supporting plate by arranging only one photoelectric sensor. The structure is simple, the manufacturing cost is saved, the program is simplified, and the failure rate is low.

[0014] As a preferred technical solution, a detection window is further arranged at a position corresponding to the upper and lower positions of the supporting plate and the photoelectric sensor, and a mirror is further arranged at a position corresponding to the detection window. This design adopts a mirror reflection type photoelectric sensor which mainly comprises a transmitter and a receiver. The receiver is a mirror reflection mirror, commonly known as a mirror. The light beam emitted from the transmitter is reflected by the mirror on the opposite side and returns to the receiver. When the light beam is interrupted, a change of a switching signal is generated. Whether the plastic bag exists on the supporting plate can be determined. Compared with other specifications of photoelectric sensors, this design uses the shielding or reflection of the detected object to the light beam, and the circuit is turned on by a synchronous circuit, so as to detect whether the object exists. Because the color and thickness of the plastic bag to be bundled are different, when other forms of photoelectric sensors are used, the photoelectric sensor needs to be adjusted if the color of the plastic bag changes. When the shielding mode is used, as long as the light beam of the photoelectric sensor is shielded at the position of the detection window, the existence of the plastic bag is indicated, which is simple to use and reliable in detection result.

[0015] The utility model discloses the beneficial effect is: compare with prior art, can detect the existence of plastic bag on the supporting plate, also can detect the existence of abnormal plastic bag, and the control system will decide whether the winding device opens according to the signal of detection, when detecting the irregular shape of plastic bag, can also control whether the work of winding device continues to carry out, thereby guaranteeing the stability of bundling machine work, also can improve the qualified rate of product to a great extent. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure principle right side schematic drawing of example;

[0017] Figure 2 It is the structure principle left side schematic drawing of example;

[0018] Figure 3 It is the overhead schematic drawing of example structure principle;

[0019] Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 It is the working step and working principle schematic drawing of example.

[0020] In the drawing: 1 - frame;2 -- bird mouth knotter;21 -- clamping buckle;3 -- winding device;31 -- winding rod;311 -- threading mouth;32 -- transverse drive mechanism;321 -- guide rail;322 -- transverse sliding block;323 -- transverse air cylinder;33 -- longitudinal drive mechanism;331 -- longitudinal air cylinder;332 -- longitudinal sliding block;34 -- connecting plate;4 -- fixed device;41 -- supporting plate;411 -- detection window;42 -- pressing plate;43 -- pressing plate air cylinder;5 -- photoelectric sensor;51 -- reflector;6 -- bundling rope;7 -- plastic bag;71 -- the part of plastic bag scattering. DETAILED DESCRIPTION

[0021] In order to comprehensively disclose the utility model, the following will be combined with the attached Figures 1 to 8 The utility model technical scheme is specifically described through example. In the description of the utility model, Figure 1 The left side of the left side is the left side described in the utility model, Figure 1 The right side of the right side is the right side described in the utility model.

[0022] As Figure 1 、 Figure 2 、 Figure 3As shown: winding device 3 includes a transverse drive mechanism 32 and longitudinal drive mechanism 33, longitudinal drive mechanism 33 is connected to the transverse drive mechanism 32 through the connecting plate 34, also includes winding rod 31, winding rod 31 is a guide rail, the lower end of winding rod 31 is also provided with a rope mouth 311; fixed device 4 includes a pressing plate 42, pressing plate cylinder 43, also includes a supporting plate 41, the supporting plate 41 is also provided with a detection window 411, the corresponding position of the observation window 411 is also installed with a mirror 51.

[0023] In the upper left of the rack 1 is installed a guide rail 321, a transverse sliding block 322 is slidingly installed on the guide rail 321 (refer to Figure 2 and Figure 3 ), a connecting plate 34 is installed on the transverse sliding block 322, a longitudinal sliding block 332 is installed on the other side of the connecting plate 34, a guide rail is longitudinally slidingly installed on the longitudinal sliding block 332 as a winding rod 31, a rope mouth 311 is installed at the lower end of the winding rod 31, a photoelectric sensor 5 is installed at the lower right side of the winding rod 31; a longitudinal cylinder 331 is installed downward on the left side of the connecting plate 34, the cylinder rod of the longitudinal cylinder 331 is connected to the lower part of the winding rod 31, a transverse cylinder 323 is installed on the right side of the connecting plate 34, the tail of the transverse cylinder 323 is installed on the rack 1; a pressing plate cylinder 43 is installed at the right upper position of the rack 1, the pressing plate cylinder 43 is a guide rod cylinder, the pressing plate 42 is installed on the cylinder rod seat of the pressing plate cylinder 43, the supporting plate 41 is installed at the position of the rack 1 corresponding downward to the pressing plate 42, a detection window 411 is provided at the position of the supporting plate 41 corresponding upward to the photoelectric sensor 5, the detection window 411 is a notch provided on the supporting plate 41, two mirrors 51 are installed at the position corresponding downward to the detection window 411, the two mirrors 51 are installed left and right; a bird beak knotter 2 is installed at the lower left of the supporting plate 41.

[0024] The working process of example one is as follows: as shown in Figure 4 , the initial state of the longitudinal cylinder 331 and the cylinder rod of the transverse cylinder 323 is retracted, the pressing plate 42 and the winding rod 31 are lifted upward, at this time one end of the binding rope 6 is clamped and fixed on the clamping 21 of the bird beak knotter 2, the other end passes through the rope mouth 311 on the winding rod 31, forming as Figure 4The state shown. When the plastic bag bundling machine is started, three conditions can occur: the first condition is that no plastic bag 7 is transported onto the support plate 41, in which case the light beam emitted by the photoelectric sensor 5 is not blocked by the plastic bag 7 and can be received by the mirror 51, so the pressing plate cylinder 43 of the winding device 3 and the fixing device 4 does not work. The second condition is that the plastic bag folding machine's conveying device (not shown) transports the plastic bag 7 onto the support plate 41 from left to right, and in the process of pushing the plastic bag 7 to the right, the bundling rope 6 is also pulled to the right, and in the process of being pulled, the bundling rope 6 is released from the rope passing mouth 311, so that the plastic bag 7 is wound by the bundling rope 6 into a state like Figure 5 The state shown, at which time the plastic bag 7 is on the support plate 41 and blocks the right side of the detection window 411, because the right side of the detection window 411 on the right side of the support plate 41 is blocked by the plastic bag 7, the light beam emitted by the photoelectric sensor 5 is blocked by the plastic bag 7 and cannot be received and reflected by the mirror 51 below it, in which case the control system controls the solenoid valve to open and the pressing plate cylinder 43 to open and drive the pressing plate 42 to move downward to press the plastic bag 7 tightly on the support plate 41, after which the transverse cylinder 323 also opens and drives the connecting plate 34 to move the winding rod 31 to the left, in the process of which the photoelectric sensor 5 also moves to the left with the winding rod 31, when the photoelectric sensor 5 moves to the left to correspond to the left mirror 51, the left side of the detection window 411 is not blocked by the plastic bag 7, indicating that the plastic bag 7 is folded normally and has not spread out, and the light beam emitted downward by the photoelectric sensor 5 can directly illuminate the left mirror 51, forming a state like Figure 6 The state shown, in which case the bundling work continues; after that, the longitudinal cylinder 331 opens and drives the winding rod 31 to move downward, the other end of the bundling rope 6 is pinched into the left side of the clamping 21 of the beak knotter 2 and is clamped, at which time the plastic bag 7 is wound by the bundling rope 6 and forms a state of being tied up, forming a state like Figure 7 The state shown; then the beak knotter 2 works to tie a knot between the clamping 21 and the plastic bag 7 to form a live knot (not shown), since the beak knotter 2 is prior art, it will not be described here. At this point, the plastic bag 7 can be transported into position and in the normal folded state, the plastic bag 7 is tied up. The third condition is that, as Figure 8As shown: although the plastic bag 7 is conveyed to the supporting plate 41, the plastic bag 7 is folded abnormally, is not folded well, and appears to be scattered, the light beam emitted downward by the photoelectric sensor 5 can be blocked by the plastic bag 7, so that the pressing plate cylinder 43 is opened to drive the pressing plate 42 to move downward to fix the plastic bag 7 on the supporting plate 41, then the transverse cylinder 323 is opened to drive the winding rod 31 and the photoelectric sensor 5 to move leftward, when the photoelectric sensor 5 moves to a position corresponding to the detection window 411 downward, the plastic bag 7 is folded abnormally and appears to be scattered, the scattered part 71 of the plastic bag is blocked on the left side of the detection window 411, so that the light beam emitted by the photoelectric sensor 5 cannot be received by the left mirror 51, forming a state as shown. Figure 8 At this time, the photoelectric sensor 5 feeds back the signal to the control system, so that the longitudinal cylinder 331 cannot be opened, and the winding device 3 stops working, so as to facilitate manual removal of the scattered plastic bag 7.

[0025] In the description of the present application, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The above-mentioned embodiments of the present application do not constitute a limitation on the protection scope of the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A plastic bag bundling machine with detection mechanism, comprising a frame (1), a beak knotter (2), a winding device (3), a fixing device (4), characterized in that: The fixing device (4) comprises a supporting plate (41), a pressing plate (42) and a pressing plate cylinder (43), the pressing plate (42) is connected to the pressing plate cylinder (43), the pressing plate (42) corresponds to the supporting plate (41) up and down, the winding device (3) comprises a winding rod (31), a transverse driving mechanism (32) and a longitudinal driving mechanism (33), the winding rod (31) is connected to the longitudinal driving mechanism (33) and the transverse driving mechanism (32), and a photoelectric sensor (5) is arranged on the supporting plate (41) or a position corresponding to the supporting plate (41) up and down.

2. A plastic bag bundling machine with a detection mechanism according to claim 1, characterized in that: The photoelectric sensor (5) is arranged on the winding device (3).

3. A plastic bag bundling machine with a detection mechanism according to claim 1, characterized in that: Detection windows (411) are arranged on positions corresponding to the photoelectric sensor (5) up and down on the supporting plate (41), and mirrors (51) are arranged on positions corresponding to the detection windows (411).

4. The plastic bag bundling machine with a detection mechanism according to claim 1, characterized in that: Rope penetrating nozzles (311) are arranged on the winding rod (31).

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