Double-swing-arm device and packaging machine

Abstract

The utility model discloses a double-swing-arm device and a packaging machine. The double-swing-arm device comprises a double-swing-arm mechanism, a driving mechanism used for driving the double-swing-arm mechanism to swing and a clamp swinging along with the double-swing-arm mechanism. One swing arm group of the double-swing-arm mechanism serves as a main swing arm group and is connected with the driving mechanism; the driving mechanism comprises a power source and a multi-connecting-rod mechanism, the power source is connected with a main shaft of the main swing arm set through the multi-connecting-rod mechanism, the main shaft can be driven by the multi-connecting-rod mechanism to rotate, and the main shaft is fixedly connected with the two swing arms of the main swing arm set. The utility model further comprises another double-swing-arm device and a packaging machine comprising the two sets of double-swing-arm devices. The utility model aims to solve the problems of low speed, inharmonious movement rhythm and poor universality in the prior art, has the advantages of high efficiency, stable operation and wide application range, improves the universality of production and manufacturing, and provides conditions for batch production.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing equipment technical field, especially a double swing arm device and packing machine. BACKGROUND

[0002] The existing packing machine in the process of packing usually includes the following operation process: the packaging bag is sequentially conveyed from the film drawing and bag making station to the bag mouth cooling station, and each packaging bag sequentially passes through the film drawing and bag making station, the bag opening station, the filling station, the sealing station (i.e. the bag mouth heat sealing station) and the bag mouth cooling station to complete a complete packaging cycle. The film drawing and bag making station is to draw the film according to the set bag length, then cut off and seal the bottom; the bag opening station is to open the bag mouth by the suction cup; the filling station is to fill the material into the packaging bag; the sealing station is to heat seal the bag mouth; and the bag mouth cooling station is to cool the sealing part. When the film drawing and bag making station completes the bag making, the bag opening station completes the bag opening, the filling station completes the filling, the sealing station completes the sealing and the bag mouth cooling station completes the cooling, the packaging bag needs to be conveyed to enter the next station from the current station.

[0003] CN214824625U discloses a double-swing-arm bag moving device, the upper end of the swing arm group is rotationally connected with a top connecting frame, and the lower end of the swing arm group is rotationally connected with a support plate; a plurality of bag moving and clamping assemblies are installed on the support plate; one of the bag moving and clamping assemblies is connected with a flattening assembly, and the flattening assembly is arranged on the support plate. The device realizes synchronous conveying to the pressing and heat sealing device after full-bag heat sealing, and heat sealing at the lower part of the clamping and discharging device, and the empty bag is conveyed to the bag opening position by the synchronous bag feeding device.

[0004] However, the above-mentioned device has the following defects: (1) on the one hand, the driving motor of the device is connected to the swing arm of the swing arm group through a crank connecting rod, which makes the swing arm bear a large torque, which may cause stress concentration of the swing arm, and further affect the service life and stability thereof; on the other hand, the driving motor directly drives the swing arm through the crank connecting rod, and such direct connection may be affected by the change of the swing arm angle, resulting in low control accuracy; (2) the device can only be used for packaging bag transmission from the filling station to the sealing station, and cannot be used for packaging bag transmission from the film drawing and bag making station to the bag opening station and then to the filling station, nor can be used for transmission from the sealing station to the bag mouth cooling station.

[0005] In addition, the double swing arm device driven by a single power mechanism in the market is usually provided with four sets of clamps and is transmitted at multiple stations (for example, five stations), however, when the single double swing arm device drives four sets of clamps to hold the packaging bag to be transmitted to the station, the load is too large, and the speed is difficult to be fast, because when the speed reaches a certain value, the vibration amplitude of the machine is too large, thereby affecting the stable operation of the machine, resulting in low conveying speed, slow work efficiency, poor stability and poor universality. Content of the utility model

[0006] The utility model aims at overcoming the problems of poor stability, large load, slow speed, uncoordinated movement rhythm and poor universality of the existing single swing arm device, and provides a double swing arm device with high efficiency, stable operation and wide application range and a packaging machine comprising the double swing arm device, which greatly improves the work efficiency of the packaging machine and improves the universality of production and manufacturing, thereby providing conditions for batch production.

[0007] The technical scheme of the utility model is:

[0008] The utility model discloses a double swing arm device, including double swing arm mechanism, be used for driving double swing arm mechanism swing's drive mechanism and follow double swing arm mechanism swing's clamp, one swing arm group of double swing arm mechanism is as main swing arm group, is connected with drive mechanism, drive mechanism includes power source and multilink mechanism, power source is connected with the main shaft of main swing arm group through multilink mechanism, and the main shaft can rotate under the drive of multilink mechanism, and the main shaft is fixedly connected with two swing arms of main swing arm group.

[0009] Further, the double swing arm mechanism includes a main swing arm group and a slave swing arm group, each swing arm group is composed of two swing arms, the upper ends of the two swing arms are fixedly connected with the main shaft, the main shaft is hinged to the bearing seats at both ends thereof, and the bearing seats are fixed to the rack; the lower ends of the two swing arms are hinged to the support plate.

[0010] Further, a plurality of clamps are arranged on the support plate, each clamp includes two clamping pieces arranged oppositely, and each clamping piece is controlled to open and close by a clamping piece driving mechanism.

[0011] Further, the clamping piece driving mechanism includes a transmission box assembly and a clamping piece cylinder; the transmission box assembly is arranged below the clamping piece, the transmission box assembly is connected to the support plate through a clamping piece base, one end of the clamping piece is hinged to a shaft at the upper end of the transmission box assembly, and a transmission mechanism in the transmission box assembly is connected to the piston rod end of the clamping piece cylinder.

[0012] Further, the distance between the two clamping pieces of at least one set of clamps can be adjusted by a clamping piece position adjusting mechanism.

[0013] Further, the clamping piece position adjusting mechanism comprises a linear guide rail and a stroke-adjustable cylinder, the linear guide rail is connected to the support plate, the clamping piece is connected to the linear guide rail through the sliding plate together with the clamping piece driving mechanism, and the stroke-adjustable cylinder is connected to the support plate through a cylinder support, the main body of the stroke-adjustable cylinder is hinged to the cylinder support, and the piston rod end is hinged to the sliding plate.

[0014] Further, the support plate of the first double swing arm device is symmetrically provided with a push plate and a push plate rotating mechanism for driving the push plate to rotate, and the push plate is arranged on the side of the clamp provided with the clamping piece position adjusting mechanism.

[0015] Further, the driving mechanism is installed above the rack, and the rack is located above the double swing arm mechanism; the multi-link mechanism comprises a connecting rod, a power arm and a driven arm, both ends of the connecting rod are hinged to the upper end of the driven arm and the power arm respectively, the lower end of the power arm is fixed to the output shaft of the power source, the lower end of the driven arm is fixed to the main shaft of the main swing arm group, and the main shaft can rotate under the driving of the multi-link mechanism.

[0016] The utility model discloses another double swing arm device, including double swing arm mechanism, the driving mechanism for driving double swing arm mechanism swing and the clamp that follows double swing arm mechanism swing, double swing arm mechanism includes main swing arm group and pull rod group, the driving mechanism includes power source and multi -link mechanism, power source is connected with main swing arm group through multi -link mechanism, the lower end of main swing arm group and pull rod group is hinged to support plate, be provided with a plurality of sets of clamps on support plate, and each set of clamps includes two clamping pieces that are oppositely arranged, and the opening and closing of each clamping piece is controlled through clamping piece driving mechanism, still be provided with knife -inserting assembly and the knife -inserting driving mechanism for controlling knife -inserting action on support plate symmetry, and the knife on knife -inserting assembly is arranged above one set of clamps.

[0017] The utility model discloses a kind of packaging machines, including first double swing arm device and second double swing arm device, first double swing arm device is according to any one of the preceding double swing arm device, second double swing arm device is according to another double swing arm device described in the preceding, two double swing arm devices are installed on rack, and the main swing arm group of first double swing arm device and the main swing arm group of second double swing arm device are all arranged on outer side, and at least two sets of clamps of second double swing arm device are respectively located at film pulling bagging station and bag opening station position, and knife is also located at the position of bag opening station, and at least two sets of clamps of first double swing arm device are respectively located at filling station and sealing station position.

[0018] The utility model has the advantages that:

[0019] 1, adopt the double power driven double set swing arm device to drive multiple sets of clamps to hold packaging bag and carry out station-to-station transmission, relative to single set driving mechanism drives single set double swing arm device to drive multiple sets of clamps to hold packaging bag and carry out station-to-station transmission, the advantages are as follows:

[0020] (1) two sets of double swing arm device driven by double drive mechanism, each set of double swing arm device only need to drive two sets of clamps,

[0021] So it can reduce the load of double swing arm mechanism, the movement speed will be faster, and the vibration will be reduced.

[0022] (2) two sets of double swing arm device driven by two sets of drive mechanism control is more flexible, without the need to make two sets of double swing arm device action at the same time, the double swing arm device with shorter action time can be started first, and the double swing arm device with longer action time can be started later. For example, the film drawing and bag making station and the bag opening station have relatively short action time, and the filling and sealing station needs longer time, so the second double swing arm device can be started first, when the second swing arm device reaches the filling station, the filling station can complete the action of this station, so the first double swing arm device can be started. In actual control, as long as the second set of double swing arm device and the first set of double swing arm device do not interfere with each other during movement, the second set of double swing arm device can be started as soon as possible to realize the empty bag reaching the filling station as soon as possible for filling, so as to gain more filling time for the filling station, thereby improving the running efficiency of the whole equipment and realizing higher packaging speed.

[0023] 2、The two sets of drive mechanisms of the device are arranged above the rack, so as not to affect the internal structure change of the whole machine, and can ensure the universality of the internal components with similar products. In addition, since the drive mechanism is at the top, the drive mechanism can also be used in the structure of similar packaging machines, which provides conditions for batch production and is conducive to reducing the production cost of product series.

[0024] 3、The two sets of drive mechanisms of the device are driven by motor driven multi-link mechanism to drive the main shaft to rotate, and the swing arm is driven by the main shaft to rotate,

[0025] In the process from rapid rotation to stop of the device, since the angle of rotation of the double swing arm connected with the main shaft is small, the inertial forces of the multi-link mechanism and the double swing arm connected with the main shaft are in opposite directions when they stop, so as to facilitate the stop of the double swing arm and reduce the vibration, thereby facilitating the stable operation of the machine. Moreover, compared with the swing arm connected to the swing arm group through the crank connecting rod in the prior art, the main shaft is connected to the swing arm through the multi-link mechanism in the present application, so as to avoid the direct action of the multi-link mechanism on the swing arm, thereby reducing the stress on the swing arm and prolonging the service life of the swing arm. Moreover, through the combination of the multi-link mechanism and the main shaft, the movement path can be more accurately controlled, and the stability and precision of the movement can be improved.

[0026] 4. In the two groups of clamps driven by the first double swing arm device, one group of clamps (the clamp moving between the filling and sealing stations) is provided with a clamp position adjusting mechanism, which can adjust the cylinder stroke according to different specifications of the packaging bags, so that the mouths of packaging bags of different specifications can be pulled tight, thereby increasing the versatility of the machine.

[0027] 5. By providing the other double swing arm device with a knife inserting assembly, the mouth of the packaging bag at the bag opening station can be opened, so as to facilitate the feeding to the filling station for filling of the packaging bag, thereby greatly improving the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the working process of the embodiment of the utility model;

[0029] Figure 2 is a schematic diagram of the three-dimensional structure of the first double swing arm device and the second double swing arm device of the embodiment of the utility model;

[0030] Figure 3 is Figure 2 the rear view of the embodiment shown in the figure;

[0031] Figure 4 is Figure 3 the top view of the embodiment shown in the figure;

[0032] Figure 5 is Figure 1 the A-A sectional view of the embodiment shown in the figure;

[0033] Figure 6 is an enlarged schematic diagram of the clamp position adjusting mechanism of the embodiment of the utility model;

[0034] Figure 7 is Figure 1 the B-B sectional view of the embodiment shown in the figure;

[0035] Figure 8 is a schematic diagram of the structure of the second double swing arm device of the embodiment of the utility model.

[0036] EXPLANATION OF THE DRAWINGS:

[0037] 1. First double swing arm device; 2. Second double swing arm device; 3. Machine frame;

[0038] 11. Main swing arm group; 12. Slave swing arm group; 13. Driving mechanism; 14. First group of clamps; 15. Second group of clamps; 16. First support plate; 17. Second support plate; 18. Clamp position adjusting mechanism; 19. Push plate rotating mechanism;

[0039] 21, pull rod group; 22, third group of clamps; 23, fourth group of clamps; 24, third support plate; 25, fourth support plate; 26, knife inserting assembly; 27, knife inserting driving mechanism;

[0040] 101, swing arm; 102, main shaft; 103, clamp; 104, transmission box assembly; 105, clamp cylinder; 106, clamp base; 107, support; 108, bearing; 109, retainer; 110, bearing with seat; 111, driving motor; 112, speed reducer; 113, machine base; 114, connecting rod; 115, power arm; 116, driven arm; 117, linear guide rail; 118, stroke adjustable cylinder; 119, sliding plate; 120, cylinder support; 121, joint bearing; 122, connecting shaft; 123, push plate; 124, support frame; 125, push plate mounting plate; 126, push plate cylinder seat; 127, push plate cylinder; 128, swing arm support seat; 129, swing arm;

[0041] 201, pull rod; 202, pull rod seat; 203, knife inserting base; 204, support shaft; 205, knife inserting swing arm; 206, first support arm; 207, second support arm; 208, knife; 209, knife inserting cylinder; 210, knife inserting cylinder support; 211, support frame. DETAILED DESCRIPTION

[0042] The utility model will be made further detailed description in combination with the drawings and specific embodiments of the specification.

[0043] As Figures 1-4 shown: a double swing arm device for packaging machine, wherein the double swing arm device can set multiple groups according to demand, for example, the embodiment preferably sets two groups, which are first double swing arm device 1 and second double swing arm device 2 respectively, and the two groups of double swing arm devices are installed on rack 3. The two groups of double swing arm devices all include double swing arm mechanism, driving mechanism 13 for driving double swing arm mechanism to swing, and two groups of clamps that swing together with double swing arm mechanism.

[0044] In the embodiment, the double swing arm mechanism includes main swing arm group 11 and slave swing arm group 12, each swing arm group is composed of two swing arms 101, the upper end of two swing arms 101 is fixedly connected with main shaft 102, and main shaft 102 can rotate, driving mechanism 13 is connected with main shaft 102 of main swing arm group 11; the lower end of two swing arms 101 is hingedly connected with support plate.

[0045] Specifically, the support plates include two independently arranged first support plate 16 and second support plate 17, the first support plate 16 is arranged opposite to the second support plate 17, and a gap formed between the two is used for passing between stations. The first support plate 16 and the second support plate 17 are respectively and parallelly arranged with two clamps, and one clamp on the first support plate 16 and the opposite clamp on the second support plate 17 form a first group of clamps 14, and the other clamp on the first support plate 16 and the other opposite clamp on the second support plate 17 form a second group of clamps 15. The clamp includes a clamp 103 and a clamp driving mechanism for controlling the opening and closing of the clamp 103. The clamp driving mechanism includes a transmission box assembly 104 and a clamp cylinder 105; the transmission box assembly 104 is arranged below the clamp 103, and the transmission box assembly 104 is connected to the support plate through a clamp base 106; one end of the clamp 103 is hinged to two shafts on the upper end of the transmission box assembly 104, and the other end of the clamp 103 forms an openable and closable clamping structure; the clamp cylinder 105 is installed on the box body of the transmission box assembly 104, the piston rod of the clamp cylinder 105 is connected with a transmission mechanism in the transmission box assembly 104, and the linear motion of the piston rod is used to drive the transmission mechanism to move, and since one end of the clamp 103 is hinged to the shaft of the transmission box assembly 104, the linear motion of the clamp cylinder 105 is converted into the rotary motion of the shaft through the transmission mechanism, so as to control the opening and closing of the clamp 103. In the embodiment, the transmission mechanism can be a connecting rod or a gear and rack, for example, a rack is installed at the end of the piston rod, and a gear is installed on the shaft of the transmission box assembly 104, and the rotary motion of the gear driven by the linear motion of the rack can realize the rotary motion of the shaft, thereby driving the clamp 103 to open and close.

[0046] As shown in Figure 5 : the bottom surfaces of the first support plate 16 and the second support plate 17 are provided with support members 107 at positions connected with the main swing arm group 11 and the slave swing arm group 12, the support members 107 are provided with bearings 108, and the two swing arms 101 of the main swing arm group 11 and the slave swing arm group 12 are hinged to the bearings 108 arranged on the support members 107, and the outer ends of the hinged positions are provided with retaining rings 109.

[0047] The main shaft 102 on the main swing arm group 11 / slave swing arm group 12 is hinged to the bearing block bearings 110 at both ends thereof, and the bearing block bearings 110 are fixed to the frame 3; the two swing arms 101 are distributed on both sides of the first support plate 16 and the second support plate 17, and the upper ends of the two swing arms 101 are clamped to the main shaft 102. The main swing arm group 11 and the slave swing arm group 12 are arranged at left rear or front and rear intervals.

[0048] In this embodiment, the driving mechanism 13 specifically comprises a driving motor 111, a speed reducer 112 connected with the output shaft of the driving motor 111, and a multi-link mechanism connected between the speed reducer 112 and the main swing arm group 11. The driving motor 111 is mounted on the speed reducer 112, and the driving motor 111 and the speed reducer 112 are connected through a shaft coupling. The speed reducer 112 is fixed on a base 113, and the base 113 is fixed on the frame 3. The multi-link mechanism comprises a connecting rod 114, a power arm 115 and a driven arm 116. The two ends of the connecting rod 114 are respectively hinged to the upper ends of the driven arm 116 and the power arm 115. The lower end of the power arm 115 is clamped on the output shaft of the speed reducer 112. The lower end of the driven arm 116 is clamped on the main shaft 102 of the main swing arm group 11, and is located on the inner side of the connection between the swing arm 101 and the main shaft 102.

[0049] When the main shaft 102 is rotated under the driving of the driving mechanism 13, the two swing arms 101 of the main swing arm group 11 will be swung, and then the first support plate 16 and the second support plate 17 and all the components on the support plates will be swung together. The slave swing arm group 12 will also be swung under the driving of the first support plate 16 and the second support plate 17, and the swinging will realize the conveying of the clamped workpiece from one station to the next station.

[0050] In this embodiment, the first group of clamps 14 of the first double swing arm device 1 is close to the side of the main swing arm group 11, and the second group of clamps 15 is close to the side of the slave swing arm group 12.

[0051] As shown in FIG. 1, the first double swing arm device 1 comprises a main swing arm group 11 and a slave swing arm group 12. The main swing arm group 11 comprises two swing arms 101, and the slave swing arm group 12 also comprises two swing arms 102. The two swing arms 101 of the main swing arm group 11 are arranged in parallel and are connected through a main shaft 102. The two swing arms 102 of the slave swing arm group 12 are arranged in parallel and are connected through a slave shaft 103. Figure 6As shown: in this embodiment, the first double swing arm device 1 can select at least one set of clamps to symmetrically arrange the clamp position adjusting mechanism 18 according to the needs, then the two clamps 103 of the set cancel the original clamp base 106, and the transmission box assembly 104 of each clamp 103 is installed on the sliding plate 119. This embodiment preferably sets the clamp position adjusting mechanism 18 on the second set of clamps 15. The clamp position adjusting mechanism 18 includes a linear guide rail 117 and a stroke-adjustable cylinder 118. The linear guide rail 117 is installed on the corresponding support plate, the transmission box assembly 104 is slidably connected to the sliding block of the linear guide rail 117 through the sliding plate 119, or the sliding plate 119 and the linear guide rail 117 are slidably connected to form a sliding block structure directly. The stroke-adjustable cylinder 118 is connected to the corresponding support plate through a cylinder support 120, the cylinder support 120 extends towards the stroke-adjustable cylinder 118, so that the cylinder body of the stroke-adjustable cylinder 118 is hinged to the cylinder support 120, the piston rod end of the stroke-adjustable cylinder 118 is screwed with a joint bearing 121, and the sliding plate 119 is provided with a connecting shaft 122, and the joint bearing 121 is hinged to the connecting shaft 122. In this embodiment, the joint bearing 121 and the connecting shaft 122 are hinged, which can allow a certain relative rotation between the piston rod end and the connecting shaft 122, so as to allow the piston rod to maintain a certain angle change during the extension and retraction process, while not affecting the sliding of the sliding plate 119 along the linear guide rail 117. When working, the piston rods of the two stroke-adjustable cylinders 118 of the oppositely arranged clamps 103 are extended, driving the sliding plate 119 to move along the linear guide rail 117, so that the transmission box assembly 104 moves inward together with the clamp cylinder 105 and the clamp 103, and the distance between the two clamps 103 is reduced; similarly, when the piston rods are extended and retracted, the transmission box assembly 104 moves outward together with the clamp cylinder 105 and the clamp 103, and the distance between the two clamps 103 is increased, thereby achieving the spacing adjustment between the two clamps 103.

[0052] In this embodiment, the first support plate 16 and the second support plate 17 of the first double swing arm device 1 are symmetrically provided with a push plate 123 and a push plate rotating mechanism 19 for driving the push plate 123 to rotate below. The push plate 123 is arranged on the side of the swing arm 101 group 12, specifically, the push plate 123 is arranged on the side of the clamp with the clamp position adjusting mechanism 18, and the push plate 123 is arranged outward, and the distance between the two push plates 123 can satisfy that the packaging bag filled with the filling material can be located between the two push plates 123 and clamped by the push plate 123 after being clamped by the clamp. The extension position of the push plate 123 can satisfy that the packaging bag can be transferred to the next station after the push plate 123 is turned out.

[0053] As Figure 7As shown: push plate rotating mechanism 19 includes support frame 124, push plate mounting plate 125, push plate cylinder seat 126, push plate cylinder 127, rotating arm support seat 128 and rotating arm 129. The bottom of the first support plate 16 and the second support plate 17 are symmetrically connected with the support frame 124, the lower part of the inner side of the support frame 124 is provided with the push plate mounting plate 125, the rear inner side of the push plate mounting plate 125 is provided with the push plate cylinder seat 126, the front inner side of the push plate mounting plate 125 is provided with the rotating arm support seat 128, the tail end of the push plate cylinder 127 is hinged with the push plate cylinder seat 126, and the piston rod end is screwed with the joint bearing 121; the piston rod end of the push plate cylinder 127 is hinged with one end of the rotating arm 129 through the joint bearing, the body of the rotating arm 129 is hinged with the rotating arm support seat 128, and the other end of the rotating arm 129 is fixedly connected with the push plate 123 through threads. Initially, the push plate 123 is vertically placed, the piston rod of the push plate cylinder 127 is telescopic to drive the rotating arm 129 to rotate, and the rotating arm 129 drives the push plate to rotate up and down, when the push plate 123 rotates downward to the horizontal direction, the packaging bag can be sent to the next station.

[0054] In the embodiment, the double swing arm mechanism of the second double swing arm device 2 includes a main swing arm group and a pull rod group 21. The structure of the main swing arm group is the same as that of the main swing arm group 11 of the first double swing arm device 1, and is also connected with the driving mechanism 13, which will not be described in detail here. The support plate of the second double swing arm device 2 includes two independently arranged third support plates 24 and fourth support plates 25, which are oppositely arranged between the third support plates 24 and the fourth support plates 25, and the gap formed between the two is used for passing between stations. The third support plate 24 and the fourth support plate 25 also have two groups of clamps arranged thereon, forming a third group of clamps 22 and a fourth group of clamps 23, and the connection mode of the clamp 103, the transmission box assembly 104, the clamp cylinder 105 and the clamp base 106 is the same as that of the first double swing arm device 1, which will not be described in detail here.

[0055] In the embodiment, the difference between the second double swing arm device 2 and the first double swing arm device 1 lies in that the pull rod group 21 is different from the slave swing arm group 12 of the first double swing arm device 1. The pull rod group 21 includes two pull rods 201, the two ends of the pull rod 201 are provided with joint bearings, the upper ends of the two pull rods 201 are respectively hinged with shafts on corresponding pull rod seats 202 through joint bearings, and the two pull rod seats 202 are fixed on the rack 3. The lower end of one pull rod 201 is hinged with a support piece 107 at the bottom of the third support plate 24 through a joint bearing, and the lower end of the other pull rod 201 is hinged with a support piece 107 at the bottom of the fourth support plate 25 through a joint bearing.

[0056] In the embodiment, the third support plate 24 and the fourth support plate 25 of the second double swing arm device 2 are symmetrically provided with a knife inserting assembly 26 and a knife inserting driving mechanism 27 for controlling the action of the knife 208.

[0057] As Figure 8As shown: the insert knife assembly 26 includes an insert knife base 203, a support shaft 204, an insert knife rotating arm 205, a first support arm 206, a second support arm 207 and an insert knife 208; the insert knife base 203 is screwed on the corresponding support plate, the support shaft 204 is connected between the two vertical plates of the insert knife base 203; the insert knife rotating arm 205 is hinged to the insert knife base 203 through a bearing and the support shaft 204, the second support arm 207 is connected to the insert knife rotating arm 205, the first support arm 206 is connected to the second support arm 207, and the insert knife 208 is connected to the first support arm 206. Among them, the second support arm 207 is vertically arranged, the first support arm 206 is horizontally arranged in an L shape, the insert knife 208 extends towards the direction of the fourth set of clamps 23, and is preferably arranged above the two clamping pieces of the fourth set of clamps 23. After the insert knife rotating arm 205 is hinged to the support shaft 204 through a bearing, the lower end thereof extends downward along the insert knife base 203 and the corresponding support plate, and is hinged to the insert knife driving mechanism 27.

[0058] The insert knife driving mechanism 27 includes an insert knife cylinder 209, which is connected and fixed with a support 211 through an insert knife cylinder support 210, the support 211 is fixed to the bottom surface of the corresponding support plate, and the tail end of the insert knife cylinder 209 is hinged to the insert knife cylinder support 210, the piston rod end is screwed with a knuckle bearing, and the knuckle bearing is hinged to the lower end of the insert knife rotating arm 205. By the extension and retraction of the insert knife cylinder 209, the insert knife rotating arm 205 is driven to rotate, and in turn the insert knife 208 is driven to rotate downward or upward.

[0059] In this embodiment, the third set of clamps 22 of the second double swing arm device 2 is close to the side of the main swing arm group 11, and the fourth set of clamps 23 is close to the side of the pull rod group 21.

[0060] As shown: Figure 1 In this embodiment, the first double swing arm device 1 and the second double swing arm device 2 are mainly used to sequentially convey the packaging bags from the film-drawing and bag-making station to the bag mouth cooling station, so that each packaging bag sequentially passes through the film-drawing and bag-making station, the bag opening station, the filling station, the sealing station (i.e. the bag mouth heat sealing station) and the bag mouth cooling station, to complete a complete packaging cycle.

[0061] It can be understood that the clamping pieces 103 in the first double swing arm device 1 and the second double swing arm device 2 can select different clamping piece structures according to different clamped pieces.

[0062] When the first double swing arm device 1 and the second double swing arm device 2 are used in each station, the two double swing arm devices are installed on the frame 3 in advance, and the main swing arm groups 11 of the first double swing arm device 1 and the second double swing arm device 2 are arranged on the outer side, and the swing arm groups 12 and the pull rod groups 21 are arranged adjacently, and the third group of clamps 22 and the fourth group of clamps 23 of the second double swing arm device 2 are respectively located at the positions of the film-pulling and bag-making station and the bag-opening station, and the knife is also located at the position of the bag-opening station, and the second group of clamps 15 and the first group of clamps 14 of the first double swing arm device 1 are respectively located at the positions of the filling station and the sealing station.

[0063] When the film-pulling and bag-making station completes bag making, the bag-opening station completes bag opening, the filling station completes filling, the sealing station completes sealing, and the bag mouth cooling station completes cooling, before the second double swing arm device 2 swings, the third group of clamps 22 and the fourth group of clamps 23 are respectively located at the output positions of the packaging bags at the film-pulling and bag-making station and the bag-opening station, wherein the pair of clamping pieces of the third group of clamps 22 are opened under the control of the clamping piece air cylinder 105, and the packaging bag after the film-pulling and bag-making station completes bag making is placed between the clamping pieces and clamped by the clamping pieces, and the action of the station is completed; and the knife 208 at the bag-opening station is driven by the knife air cylinder 209 to rotate downward to insert into the packaging bag, and then the pair of clamping pieces of the fourth group of clamps 23 clamps the packaging bag, and the action of the station is completed. Before the second double swing arm device 2 swings, the second group of clamps 15 and the first group of clamps 14 are respectively located at the output positions of the packaging bags at the filling station and the sealing station; wherein the pair of clamping pieces of the second group of clamps 15 are first controlled by the two stroke-adjustable air cylinders 118 to move inward on both sides, then clamp the packaging bag, and then the pair of clamping pieces are controlled by the stroke-adjustable air cylinder 118 to move outward to tighten the bag mouth (because the bag mouth of the filling station is open); at the same time, the push plate air cylinder 127 drives the push plate 123 to rotate inward, so that the two push plates 123 are close to the packaging bag (to push the packaging bag filled with material to the sealing station), and the action of the station is completed. The packaging bag at the sealing station is clamped by the pair of clamping pieces of the first group of clamps 14, and the action of the station is completed.

[0064] When the packaging bag is conveyed, the driving mechanism 13 of the second double swing arm device 2 is actuated, the driving motor 111 drives the multi-link mechanism to actuate through the speed reducer 112, i.e. the power arm 115, the connecting rod 114 and the driven arm 116 rotate to drive the main swing arm group 11 to move towards the bag-opening station (the packaging bag is conveyed to the bag-opening station), and the action of the station is completed. Figure 1When the two sets of double swing arm devices reach the next station, a station conversion is completed, each packaging bag moves one station forward, and then the two sets of double swing arm devices swing back to the initial station in the opposite direction, i.e. a station conversion work flow is completed.

[0065] In addition, the term "connected" should be interpreted broadly, for example, it can include fixed connection, detachable connection or integral connection; it can include direct connection or indirect connection through an intermediate medium; it can also include the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0066] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0067] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A double swing arm device comprising a double swing arm mechanism, a driving mechanism for driving the double swing arm mechanism to swing, and a clamp swinging with the double swing arm mechanism; one swing arm group of the double swing arm mechanism serves as a main swing arm group and is connected with the driving mechanism; characterized in that, The driving mechanism comprises a power source and a multi-link mechanism, the power source is connected with a main shaft of the main swing arm group through the multi-link mechanism, the main shaft can rotate under the driving of the multi-link mechanism, and the main shaft is fixedly connected with two swing arms of the main swing arm group.

2. The dual swing arm device of claim 1, wherein, The double swing arm mechanism comprises a main swing arm group and a slave swing arm group, each swing arm group is composed of two swing arms, the upper ends of the two swing arms are fixedly connected with the main shaft, the main shaft is hingedly connected with bearing seats at both ends of the main shaft, and the bearing seats are fixed on the rack; the lower ends of the two swing arms are hingedly connected with a support plate.

3. The dual swing arm device of claim 2, wherein, A plurality of clamps are arranged on the support plate, each clamp comprises two clamping pieces arranged oppositely, and each clamping piece is controlled to open and close by a clamping piece driving mechanism.

4. The dual swing arm device of claim 3, wherein, The clamping piece driving mechanism comprises a transmission box assembly and a clamping piece cylinder; the transmission box assembly is arranged below the clamping piece, the transmission box assembly is connected to the support plate through a clamping piece base, one end of the clamping piece is hingedly connected to a shaft at the upper end of the transmission box assembly, and a transmission mechanism in the transmission box assembly is connected with a piston rod end of the clamping piece cylinder.

5. The dual swing arm device of claim 2, wherein, At least one set of clamps can adjust the distance between the two clamping pieces through a clamping piece position adjusting mechanism.

6. The dual swing arm device of claim 5, wherein, The clamping piece position adjusting mechanism comprises a linear guide rail and a stroke-adjustable cylinder, the linear guide rail is connected to the support plate, the clamping piece is slidably connected to the linear guide rail through a sliding plate together with the clamping piece driving mechanism, and the stroke-adjustable cylinder is connected to the support plate through a cylinder support, the main body of the stroke-adjustable cylinder is hingedly connected with the cylinder support, and the piston rod end is hingedly connected with the sliding plate.

7. The dual swing arm device of claim 5, wherein, A push plate and a push plate rotating mechanism for driving the push plate to rotate are symmetrically arranged below the support plate, and the push plate is arranged on the side of the clamp with the clamping piece position adjusting mechanism.

8. The dual swing arm device of claim 1, wherein, The driving mechanism is arranged above the rack, and the rack is arranged above the double swing arm mechanism; the multi-link mechanism comprises a connecting rod, a power arm and a driven arm, the two ends of the connecting rod are hingedly connected to the upper ends of the driven arm and the power arm, the lower end of the power arm is fixedly connected to the output shaft of the power source, the lower end of the driven arm is fixedly connected to the main shaft of the main swing arm group, and the main shaft can rotate under the driving of the multi-link mechanism.

9. A double swing arm device comprising a double swing arm mechanism, a driving mechanism for driving the double swing arm mechanism to swing, and a clamp that swings together with the double swing arm mechanism, characterized by, The double swing arm mechanism comprises a main swing arm group and a pull rod group, the driving mechanism comprises a power source and a multi-link mechanism, the power source is connected with the main swing arm group through the multi-link mechanism; the lower ends of the main swing arm group and the pull rod group are hingedly connected with a support plate; a plurality of clamps are arranged on the support plate, each clamp comprises two clamping pieces arranged oppositely, and each clamping piece is controlled to open and close by a clamping piece driving mechanism; the support plate is also symmetrically provided with a knife inserting assembly and a knife inserting driving mechanism for controlling the action of the knife; and the knives of the knife inserting assembly are arranged above one set of clamps.

10. A packaging machine characterized in that, The first double swing arm device and the second double swing arm device are installed on a rack, and the main swing arm groups of the first double swing arm device and the second double swing arm device are arranged on the outer sides, and at least two groups of clamps of the second double swing arm device are respectively located at the positions of the film drawing and bag making station and the bag opening station, and the insertion knife is also located at the position of the bag opening station, and at least two groups of clamps of the first double swing arm device are respectively located at the positions of the filling station and the sealing station.

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