A fully automatic M-shaped bag bag-feeding packaging machine

Abstract

The present invention relates to a fully automatic M-shaped bag feeding and packaging machine, which comprises a frame, a turntable, a sub-clamping device, a bag loading device, a bag opening device, a feeding device, a heat sealing device, and a vertical bag feeding device. It is characterized in that the sub-clamping device comprises a left machine clamping seat, a right machine clamping seat, two groups of outer sub-clamping heads, two groups of inner sub-clamping heads, and a telescopic swing arm mechanism. The left machine clamping seat is provided with a first meshing gear set, and the right machine clamping seat is provided with a second meshing gear set. The left machine clamping seat and the right machine clamping seat can respectively make relative opening and closing movements around their hinge joints with the frame. The beneficial effects of the present invention are as follows: providing a fully automatic M-shaped bag feeding and packaging machine, enabling the M-shaped bag to be fully opened, without situations such as material waste, insufficient packaging quantity, and environmental pollution, ensuring that the packaging is filled in place, improving the packaging speed, quality, and production efficiency, reducing the overall volume of the packaging machine, and decreasing the floor area.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging equipment, and particularly relates to a fully automatic M-shaped bag bag-feeding packaging machine. Background Art

[0002] A bag-feeding packaging machine is a packaging equipment that can automatically output packaging bags, open the bag mouths of the packaging bags, inject required materials such as food, and automatically seal the bag mouths. At present, the bag-feeding automatic packaging machine has gradually replaced manual packaging, realizing packaging automation for large enterprises and small and medium-sized enterprises. Operators only need to place hundreds of pre-made bags at the bag-taking part of the equipment at one time, and the mechanical claws of the equipment will automatically take the bags, print dates, open the bags, send signals to the metering device for metering and discharging materials, seal the bags, and output.

[0003] At present, packaging bags are generally divided into three-side sealed bags, four-side sealed bags, special-shaped bags, M-shaped packaging bags, etc. Among them: the longitudinal two sides of the M-shaped packaging bag are concave and in an M-shaped structure, and its bag mouth is generally in a concave-convex groove buckling manner. At present, the existing bag-feeding packaging machines mainly use suction cups or sub-clamps for clamping and opening. When using a suction cup, due to untimely supply of air or evacuation of vacuum, the packaging bag may fall off and cannot be opened. When using an ordinary sub-clamp assembly, the two sides of the packaging bag can be clamped, but it is difficult to clamp the front and rear sides of its concave two sides, resulting in insufficient opening of the bag mouth, causing material waste, insufficient packaging quantity, environmental pollution, etc., which has an adverse impact on packaging filling, packaging speed and its quality.

[0004] Moreover, in the fully automatic bag-feeding packaging machine equipment, a fast bag-loading device is an essential module. The bag-loading devices in the existing packaging machines generally consist of two actions. First, the clamping member is brought to the feeding position, and the clamping member clamps the packaging bag. Second, the clamping member is brought to the discharging position, and the clamping member releases the packaging bag and then returns to the feeding position. However, in this process, the clamping member is likely to hook the packaging bag during the return path, affecting the completion of the packaging bag and the next process, and there is a problem of poor working stability. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a fully automatic M-shaped bag bag-feeding packaging machine in view of the deficiencies of the above-mentioned prior art, so as to enable the M-shaped bag to be fully opened, without causing material waste, insufficient packaging quantity, environmental pollution, etc., ensuring that the packaging filling is in place, improving the packaging speed and its quality, improving production efficiency, reducing the overall volume of the packaging machine, and reducing the floor area.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A fully automatic M-shaped bag feeding and packaging machine, comprising a frame, a movable turntable is provided in the middle of the frame, and a plurality of groups of sub-clamp devices that can follow the turntable for synchronous steering movement are evenly distributed on the outer periphery of the turntable. The frame is located on the outer periphery of the turntable and is provided with a bag loading device, a bag opening device, a feeding device, and a heat sealing device in sequence. The frame is located on the side of the bag loading device away from the turntable and is provided with a vertical bag feeding device, characterized in that: the sub-clamp device comprises a left machine clamp seat, a right machine clamp seat, two groups of structurally symmetrical outer sub-clamp head groups, and two groups of structurally symmetrical inner sub-clamp head groups, the left machine clamp seat and the right machine clamp seat are arranged opposite to each other and the same end of the two are respectively hinged to the turntable, the left machine clamp seat is located at the hinged end with the turntable and faces the right machine clamp seat A first meshing gear set is provided on the side of the seat, and the right machine clamp seat is located at a hinged end with a second meshing gear set meshing with the first meshing gear set, and the left machine clamp seat and the right machine clamp seat can respectively make relative opening and closing movements around their own hinges with the turntable through the first meshing gear set and the second meshing gear set. The two groups of outer sub-chuck groups are respectively located at the ends of the left machine clamp seat and the right machine clamp seat away from the hinges with the turntable, and the two groups of inner sub-chuck groups are respectively installed on the left machine clamp seat and the right machine clamp seat and distributed between the outer sub-chuck group and the turntable. The turntable is installed with a telescopic swing arm mechanism which can respectively link with the outer sub-chuck group and the inner sub-chuck group and drive the outer sub-chuck group and the inner sub-chuck group to make relative opening and closing movements.

[0008] By adopting the above technical scheme, the sub-clamp device is improved. Compared with the packaging machine in the prior art which adopts the suction cup form, the left machine clamp seat and the right machine clamp seat can make an opening and closing movement similar to pliers under the linkage of the two meshing gear sets, which can ensure that both sides of the bag are completely accommodated in the clamping range of the left machine clamp seat and the right machine clamp seat, and will not interfere with the side of the bag, so that the outer sub-clamp head group and the inner sub-clamp head group can accurately and firmly clamp the front and rear edges of the two sides of the inner concave of the M-shaped bag, and further control the inner sub-clamp head group to move toward the outer sub-clamp head group through the telescopic swing arm mechanism. The clamping head group moves back and forth to control the opening and closing of the M-shaped bag, so that the M-shaped bag can be opened completely without causing material waste, insufficient packaging, environmental pollution, etc., ensuring that the packaging is filled in place and improving the packaging speed and quality; the whole is a fully automatic equipment, which integrates bag loading, bag opening, material adding, and heat sealing, thereby improving production efficiency; and further, a turntable is set as a carrier to receive multiple groups of sub-clamp devices. Compared with the overall streamlined packaging machine in the prior art, the overall volume of the packaging machine is reduced and the floor space is reduced.

[0009] The above-mentioned fully automatic M-shaped bag-feeding packaging machine can be further configured as follows: the left machine clamp seat and the right machine clamp seat are each hinged with a linkage machine clamp body at the end away from the turntable hinge, the inner sub-clamp group and the outer sub-clamp group are installed on the linkage machine clamp body, and the linkage machine clamp body is linked with the organic clamp swing guide mechanism.

[0010] The above-mentioned fully automatic M-shaped bag-feeding and packaging machine can be further configured as follows: the machine clamp swing guide mechanism includes a first machine clamp swing guide rod placed on the side of the left machine clamp seat away from the first meshing gear group, and a second machine clamp swing guide rod placed on the side of the right machine clamp seat away from the second meshing gear group. One end of the first machine clamp swing guide rod is hinged to the turntable, and the other end is hinged to the linkage machine clamp body. The hinge points at both ends of the first machine clamp swing guide rod and the two hinge points on the left machine clamp seat that are respectively hinged to the turntable and the linkage machine clamp body are connected in sequence to form a closed figure that is a parallelogram. One end of the second machine clamp swing guide rod is hinged to the turntable, and the other end is hinged to the linkage machine clamp body. The hinge points at both ends of the second machine clamp swing guide rod and the two hinge points on the right machine clamp seat that are respectively hinged to the turntable and the linkage machine clamp body are connected in sequence to form a closed figure that is a parallelogram.

[0011] By adopting the above technical scheme, the linkage machine clamp body mainly plays the role of bearing various components and realizing the force transmission, and the two groups of inner sub-chuck groups and the two groups of outer sub-chuck groups are respectively linked with the left machine clamp seat and the right machine clamp seat through the linkage machine clamp body, and it is beneficial to the installation of the two groups of inner sub-chuck groups and the two groups of outer sub-chuck groups; further, the linkage machine clamp body and the left machine clamp seat and the right machine clamp seat are in the form of relatively rotatable hinged connection, and are matched with a machine clamp swing guide mechanism to ensure that the central axis of the linkage machine clamp body always maintains one direction during the movement, that is, consistent with the front and rear edge connection lines on both sides of the inner concave of the M-shaped bag, to ensure that the actual effective bag clamping distance of the outer machine chuck group is consistent with the actual effective bag clamping distance of the inner machine chuck group; when the actual effective bag clamping distance of the outer machine chuck group is inconsistent with the actual effective bag clamping distance of the inner machine chuck group, the left machine clamp seat and the right machine clamp seat are connected. After the two are screwed together, the side edges of the bag clamped by the outer machine chuck group will be twisted, folded, etc., affecting subsequent work such as bag opening, loading, and bag sealing. The above-mentioned technical scheme can effectively improve this situation and ensure that the actual effective bag clamping distances of the outer machine chuck group and the inner machine chuck group are always consistent; the machine clamp swing guide mechanism is mainly composed of the first machine clamp swing guide rod (the second machine clamp swing guide rod), and the hinge points at both ends are respectively connected with the adjacent left machine clamp seat (right machine clamp seat) and the hinge points of the linkage machine clamp body and the machine clamp in sequence to form a parallelogram. According to the movement rules of the parallelogram, any side can only make parallel movement parallel to the opposite side. Therefore, at this time, the linkage machine clamp body always keeps its own axial direction unchanged during the process of following the two machine clamp seats to rotate and open and close, thereby ensuring that the actual effective bag clamping distances of the outer machine chuck group and the inner machine chuck group are consistent.

[0012] The above-mentioned fully automatic M-shaped bag feeding and packaging machine can be further configured as follows: The outer sub-chuck group includes a movable chuck, an outer machine chuck, an outer cylinder barrel, and an outer cylinder piston rod. The outer cylinder barrel is slidably installed on the linkage machine chuck body. The outer machine chuck is relatively fixedly installed at the end of the outer cylinder barrel. The middle of the movable chuck is hinged to the outer machine chuck, and the end of the movable chuck is hinged to the outer cylinder piston rod. The movable chuck makes a lever movement around the middle hinge under the drive of the outer cylinder piston rod, and the telescopic swing arm mechanism is linked with the outer machine chuck.

[0013] With the above technical solution, the outer cylinder drives the movable chuck to make a lever movement around its middle hinge, thereby completing the clamping and releasing of the front sides of the concave parts on both sides of the M-shaped bag; and further, under the drive of the telescopic swing arm mechanism, it can make a reciprocating movement towards the inner machine chuck group, thereby completing the bag clamping and bag opening work.

[0014] The above-mentioned fully automatic M-shaped bag feeding and packaging machine can be further configured as follows: The inner sub-chuck group includes an inner machine chuck, an inner cylinder barrel, and an inner cylinder piston rod. The inner cylinder barrel is slidably installed on the linkage machine chuck body. The inner machine chuck is provided with an inner machine chuck positioning side plate and an inner machine chuck auxiliary clamping plate. There is a clamping material gap between the inner machine chuck positioning side plate and the inner machine chuck auxiliary side plate. The inner machine chuck positioning side plate is relatively fixedly connected to the inner cylinder barrel. The inner cylinder piston rod can make a reciprocating linear movement towards the inner machine chuck auxiliary clamping plate through the inner cylinder barrel and the clamping material gap in sequence. The telescopic swing arm mechanism is linked with the inner machine chuck.

[0015] With the above technical solution, the clamping material gap is used to guide and position the rear sides of the concave parts on both sides of the M-shaped bag; the inner cylinder piston rod is used to clamp and position the rear sides of the concave parts on both sides of the M-shaped bag. At this time, since the inner cylinder barrel is fixedly connected to the inner machine chuck positioning side plate in the inner machine chuck, the inner cylinder piston rod can extend and cooperate with the inner machine chuck auxiliary clamping plate to clamp the rear sides of the concave parts on both sides of the M-shaped bag; then the telescopic swing arm mechanism can drive the inner machine chuck to make a reciprocating movement towards the outer machine chuck, realizing the opening and closing of the M-shaped bag, and ensuring that the M-shaped bag is fully opened; and the outer machine chuck group and the inner machine chuck group make relative opening and closing movements at the same time. Compared with the prior art in which the inner machine chuck group (outer machine chuck group) makes a one-sided opening and closing movement towards the outer machine chuck group (inner machine chuck group), the single opening and closing cycle is shortened, thereby improving the production cycle.

[0016] The above-mentioned fully automatic M-shaped bag feeding and packaging machine can be further configured as follows: The telescopic swing arm mechanism includes a central connecting rod hinged in the middle to the linkage clamping body. The end of the central connecting rod is linked with a first transition connecting rod. The end of the first transition connecting rod away from the central connecting rod is hinged to the inner clamping head. The other end of the central connecting rod is linked with a second transition connecting rod. The end of the second transition connecting rod away from the central connecting rod is hinged to the outer clamping head. The central connecting rod is coaxially hinged at the end where it is hinged to the second transition connecting rod with a telescopic clamping connecting rod assembly. The telescopic clamping connecting rod assembly is linked with a telescopic clamping swing arm. The end of the telescopic clamping swing arm is hinged to the turntable. The machine frame is provided with a telescopic drive assembly that can be linked with the telescopic clamping swing arm on the outer periphery of the turntable.

[0017] With the above technical solution, both ends of the central connecting rod are respectively linked with the outer clamping head and the inner clamping head through two transition connecting rods, and its middle is hinged to the linkage clamping body. Since the outer cylinder barrel is slidably assembled on the linkage clamping body, and the inner cylinder barrel is also slidably assembled on the linkage clamping body, when the telescopic clamping swing arm is driven, the telescopic clamping connecting rod assembly transmits the force to the central connecting rod. The outer clamping head group and the inner clamping head group will make relative opening and closing movements driven by the two transition connecting rods, realizing the opening and closing of the M-shaped bag, and ensuring that the M-shaped bag is fully opened.

[0018] The above-mentioned fully automatic M-shaped bag feeding and packaging machine can be further configured as follows: The telescopic drive assembly includes a telescopic clamping arc plate, an extending clamping cam plate, a retracting clamping cam plate, an extending clamping cam, and a retracting clamping cam placed on the outer periphery of the turntable and on the side of the telescopic clamping swing arm. The extending clamping cam plate is placed at one end of the telescopic clamping arc plate and is linked with the extending clamping cam. The retracting clamping cam plate is placed at the other end of the telescopic clamping arc plate, and the retracting clamping cam plate is linked with the retracting clamping cam.

[0019] The above-mentioned technical scheme is adopted, wherein the function of the telescopic driving assembly is to control the movement of the telescopic clamp swing arm, and then control the clamping and releasing of the sub-clamp device; wherein, when a group of sub-clamp devices for clamping materials move to the position of the clamping cam piece along the effective rotation direction under the drive of the turntable, the clamping cam drives the clamping cam piece to move toward the ground, and then pushes the telescopic clamp swing arm to swing downward to the bottom of the telescopic clamp arc plate, and in this process drives the inner sub-clamp head group to move in the direction away from the outer sub-clamp head group to open the bag; and in the process again, the telescopic clamp arc plate limits the telescopic clamp swing arm to prevent the telescopic clamp swing arm from resetting, ensuring that the bag always remains in an open state; when this group of sub-clamp devices for clamping materials continue to move to the position of the retracting cam piece along the effective rotation direction under the drive of the turntable, due to the separation from the telescopic clamp, The shrinking clamp arc plate is limited, so the telescopic clamp swing arm automatically lifts up to reset until it contacts and connects with the shrinking clamp cam piece, and then the shrinking clamp cam drives the shrinking clamp cam piece to move away from the ground, and the telescopic clamp swing arm slowly resets to the initial position, driving the inner sub-clamp group and the outer sub-clamp group to move relative to each other, and closing the bag. The function of the shrinking clamp cam piece is mainly to convert the rigid impact into a flexible impact, which is mainly because the telescopic clamp swing arm directly resets to the original position after separating from the telescopic clamp arc plate, and the inner and outer sub-clamp groups and other components may produce a rigid impact. Therefore, the shrinking clamp cam piece can prevent this phenomenon from occurring, so that the telescopic clamp swing arm slowly resets; each group of sub-clamp devices completes the work in turn through the extending clamp cam piece and the shrinking clamp cam piece according to the above-mentioned actions, and the purpose of opening and closing the bag is to facilitate feeding and heat sealing.

[0020] The above-mentioned fully automatic M-shaped bag-feeding packaging machine can be further configured as follows: the bag loading device includes a bag standing mechanism, a bag delivery mechanism that can receive bags transported by the bag standing mechanism and open and transport the bags and is linked to a power mechanism; the bag delivery mechanism includes a first suction cup, a second suction cup, an opening and closing assembly that is respectively linked to the first suction cup and the second suction cup and can control the opening and closing of the first suction cup and the second suction cup; the bag delivery mechanism also includes a rotation assembly that is linked to the opening and closing assembly and can drive the opening and closing assembly to rotate; the rotation assembly is linked to a sliding assembly, and the sliding assembly can drive the rotation assembly and the opening and closing assembly to perform reciprocating linear motion in the plane of the frame along the direction of the effective opening and closing axis of the opening and closing assembly.

[0021] By adopting the above technical scheme, the bag loading device is mainly completed by four steps of bag grabbing, bag erecting, bag opening and bag delivery, and is divided into a bag erecting mechanism and a bag delivery mechanism, and both are driven by a power mechanism. Compared with the existing technology, they are not easy to interfere with each other, and the phenomenon of hooking the packaging bag will not occur. The overall work is in order, and it is conducive to the full automation of packaging bags and improves production efficiency; wherein the bag erecting mechanism mainly completes bag grabbing and bag erecting, converts the bag from an inclined, horizontal and other states to a vertical state, and transports it to the bag delivery mechanism, the bag delivery mechanism clamps the bag through two suction cups, and further through the opening and closing component, it can complete the bag opening work, and then further through the sliding component, the bag is delivered to the next process of the M-shaped bag feeding and packaging machine, and in the bag delivery process, the opening and closing component slightly opens the bag, so that the subsequent M-shaped bag feeding and packaging machine will accurately clamp the front and rear edges of the concave sides of the M-shaped bag; wherein the main function of the rotation component is to lift the two suction cups after completing the bag delivery to prevent the suction cups from interfering with the bag during the process of returning to the original position.

[0022] The above-mentioned fully automatic M-shaped bag-to-bag packaging machine can be further configured as follows: the opening and closing component includes an opening and closing linkage frame, a screw mechanism and a first servo motor linked to the screw mechanism are installed at the end of the opening and closing linkage frame, the screw mechanism is threadedly linked with a first slider linked to the first suction cup and a second slider linked to the second suction cup in sequence along its own axial direction, the first servo motor can drive the first slider and the second slider to make relative opening and closing movements through the screw mechanism, the opening and closing linkage frame is symmetrically provided with guide rods on both sides of the screw mechanism, the two ends of the guide rods are respectively slidably matched with the first slider and the second slider, and the end of the opening and closing linkage frame away from the installation of the screw mechanism is linked with the rotation assembly.

[0023] By adopting the above technical scheme, the opening and closing linkage frame is mainly used to bear various components and realize force transmission; the first servo motor can drive the two sliders to make relative opening and closing movements along the axis of the screw mechanism through the screw mechanism, and then control the opening and closing between the first suction cup and the second suction cup to complete the bag opening work, wherein the opening size of the bag can be adjusted according to the actual situation by adjusting the feed amount of the first cylinder; and the two suction cups make relative movement, and compared with the relative movement of a single suction cup toward another group of suction cups, the opening and closing movement time is shortened. After multiple reciprocating operations, the production cycle will also be shortened, thereby improving production efficiency.

[0024] The above-mentioned fully automatic M-shaped bag-to-bag packaging machine can be further configured as follows: the rotation assembly includes a bearing seat fixedly connected to the sliding assembly, the end of the opening and closing linkage frame away from the installation screw mechanism is hinged to the bearing seat, the opening and closing linkage frame is relatively fixedly connected with a cylinder distributed between the bearing seat and the guide rod, one end of the cylinder away from the closing linkage frame is linked to the sliding assembly, and the opening and closing linkage frame reciprocates around the bearing seat under the drive of the cylinder.

[0025] With the above technical solution, since the end of the opening and closing linkage frame is hinged to the bearing seat, the cylinder block is fixedly installed on the opening and closing linkage frame, and the telescopic rod of the cylinder itself is linked with the sliding component. Therefore, when the cylinder works, the opening and closing linkage frame rotates around the hinge with the bearing seat, and after the bag delivery is completed, the two suction cups are lifted to prevent the suction cups from interfering with the bag during the process of returning to the original position.

[0026] The above-mentioned fully automatic M-shaped bag feeding and packaging machine can be further set as follows: the sliding component includes a guide rail fixedly installed on the machine frame and a sliding bottom plate that slides and links with the guide rail. The bearing seat is fixedly installed on the sliding bottom plate. The end of the cylinder far away from the opening and closing linkage frame is hinged to the sliding bottom plate, and the power mechanism is linked with the sliding bottom plate.

[0027] With the above technical solution, the sliding bottom plate drives the opening and closing linkage frame to make a reciprocating linear motion along the axis of the guide rail through the bearing seat to complete the bag delivery work.

[0028] The above-mentioned fully automatic M-shaped bag feeding and packaging machine can be further set as follows: the vertical bag mechanism includes an upper bag rotating shaft hinged at both ends to the machine frame and linked with the power mechanism. The upper bag rod is relatively fixed to the upper bag rotating shaft. The end of the upper bag rod far away from the upper bag rotating shaft is linked with a rotary air gripper. The power mechanism drives the upper bag rod to make a reciprocating rotation around the central axis of the upper bag rotating shaft through the upper bag rotating shaft.

[0029] With the above technical solution, the upper bag rotating shaft rotates self-driven under the drive of the power mechanism and drives the upper bag rod to rotate. The rotary air gripper grabs the bag to complete the two processes of bag grasping and bag standing, and delivers it to the two suction cups.

[0030] The above-mentioned fully automatic M-shaped bag feeding and packaging machine can be further set as follows: the vertical bag feeding device includes two sets of symmetrically arranged bag bin side plates and a bag support plate placed between the two sets of bag bin side plates. Above the bag bin side plates, there is an upper bag suction cup that can suck the bag in the bag support plate. The bag support plate is linked with a lifting cross bar. The lifting cross bar is slidably connected to a bag bin guiding column fixedly installed on the machine frame. The end of the lifting cross bar is linked with a second servo motor. The second servo motor can drive the bag support plate to make a reciprocating linear motion along the axis direction of the bag bin guiding column through the lifting cross bar. The bag bin side plate is provided with a relief groove corresponding to the lifting cross bar.

[0031] With the above technical solution, the bag support plate can lift the bag according to the actual situation under the drive of the lifting cross bar and the second servo motor, which is convenient for the upper bag suction cup to suck the bag and deliver it to the vertical bag mechanism in the upper bag device.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0033] Figure 1Schematic diagram of the overall structure of the embodiment of the present invention;

[0034] Figure 2 Schematic diagram of the structure of the sub - clip device of the embodiment of the present invention;

[0035] Figure 3 Left - view schematic diagram of the sub - clip device of the embodiment of the present invention;

[0036] Figure 4 Top - view schematic diagram of the sub - clip device of the embodiment of the present invention;

[0037] Figure 5 Bottom - view schematic diagram of the sub - clip device of the embodiment of the present invention;

[0038] Figure 6 Schematic diagram of the structure of the telescopic drive assembly of the embodiment of the present invention;

[0039] Figure 7 Schematic diagram of the assembly state of the telescopic drive assembly and two groups of sub - clip devices of the embodiment of the present invention;

[0040] Figure 8 Schematic diagram of the structure of the vertical bag - feeding device of the embodiment of the present invention;

[0041] Figure 9 Schematic diagram of the structure of the bag - loading device of the embodiment of the present invention;

[0042] Figure 10 Top - view schematic diagram of the bag - loading device of the embodiment of the present invention;

[0043] Figure 11 Right - view schematic diagram of the bag - loading device of the embodiment of the present invention. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] Such as Figure 1The fully automatic M-shaped bag feeding and packaging machine shown in the figure comprises a frame 1, a movable turntable 2 is provided in the middle of the frame 1, and multiple groups of sub-clamp devices 5 that can follow the turntable 2 to perform synchronous steering movement are evenly distributed on the periphery of the turntable 2. The frame 1 is located on the periphery of the turntable 2 and is provided with a bag loading device 4, a bag opening device, a feeding device, and a heat sealing device 11 in sequence along the effective rotation direction. The frame 1 is located on the side of the bag loading device 4 away from the turntable 2 and is provided with a vertical bag feeding device 3. The bag opening device includes an upper bag opening suction cup assembly 6 and a lower bag opening suction cup assembly 7. The feeding device includes a feeding assembly 8, a barrel material assembly 9, and a bag closing assembly 10, which are located on the periphery of the turntable 2 and are arranged in sequence along the effective rotation direction. Among them, the upper bag opening suction cup assembly 6, the lower bag opening suction cup assembly 7, the feeding assembly 8, the barrel material assembly 9, and the bag closing assembly 10 can be selectively selected and matched according to actual conditions.

[0046] like Figure 8 The vertical bag feeding device 3 shown includes two groups of symmetrically arranged bag bin side panels 31 and a bag support plate 32 placed between the two groups of bag bin side panels 31. An upper bag suction cup 33 that can absorb the bag in the bag support plate 32 is provided above the bag bin side panels 31. The bag support plate 32 is linked to a lifting cross bar 34. The lifting cross bar 34 is slidably connected to a bag bin guide column 35 fixedly installed on the frame 1. The end of the lifting cross bar 34 is linked to a second servo motor 36. The second servo motor 36 can drive the bag support plate 32 to make reciprocating linear motion along the axial direction of the bag bin guide column 35 through the lifting cross bar 34. The bag bin side panel 31 is provided with a yield groove 311 corresponding to the lifting cross bar 34.

[0047] The working principle of the vertical bag feeding device 3 is as follows: the M-shaped bag is placed on the bag support plate 32, and the upper bag suction cup 33 sucks up the bag and transports it to the bag standing mechanism. During this period, as the bag is continuously transported, the distance between the bag support plate 32 and the upper bag suction cup 33 becomes farther and farther. At the same time, the second servo motor 36 controls the bag support plate 32 to continuously lift toward the upper bag suction cup 33 through the lifting cross bar 34 to ensure that the bag can be continuously clamped.

[0048] like Figures 9 to 11 The bag loading device 4 shown includes a bag standing mechanism 41, a bag delivering mechanism which can receive bags transported by the bag standing mechanism 41 and open and transport the bags and is linked to a power mechanism, the bag delivering mechanism includes a first suction cup 42, a second suction cup 43, an opening and closing assembly which is linked to the first suction cup 42 and the second suction cup 43 respectively and can control the opening and closing of the first suction cup 42 and the second suction cup 43, the bag delivering mechanism also includes a rotation assembly which is linked to the opening and closing assembly and can drive the opening and closing assembly to rotate, the rotation assembly is linked to a sliding assembly, and the sliding assembly can drive the rotation assembly and the opening and closing assembly to perform reciprocating linear motion along the plane direction of the frame 1.

[0049] The opening and closing assembly includes an opening and closing linkage frame 44. At the end of the opening and closing linkage frame 44, a lead screw mechanism 494 and a first servo motor 48 linked to the lead screw mechanism 494 are installed. Along the axial direction of its own axis, the lead screw mechanism 494 is in threaded linkage with a first slider 46 linked to the first suction cup 42 and a second slider 47 linked to the second suction cup 43 in sequence. The first servo motor 48 can drive the first slider 46 and the second slider 47 to perform relative opening and closing movements through the lead screw mechanism 494. Guide rods 45 are symmetrically distributed on both sides of the lead screw mechanism 494 on the opening and closing linkage frame 44. Both ends of the guide rods 45 are in sliding fit with the first slider 46 and the second slider 47 respectively. One end of the opening and closing linkage frame 44 far from the installation of the lead screw mechanism 494 is linked to the rotation and translation assembly.

[0050] The rotation and translation assembly includes a bearing seat 49 fixedly connected to one end of the sliding assembly. The end of the opening and closing linkage frame 44 far from the guide rod 45 is hinged and linked to the bearing seat 49. A cylinder 491 is fixedly connected between the bearing seat 49 and the guide rod 45 on the opening and closing linkage frame 44. One end of the cylinder 491 far from the opening and closing linkage frame 44 is linked to the sliding assembly.

[0051] The sliding assembly includes a guide rail 492 fixedly installed on the machine frame 1 and a sliding bottom plate 493 slidably linked to the guide rail 492. The bearing seat 49 is fixedly installed on the sliding bottom plate 493. One end of the cylinder 491 far from the opening and closing linkage frame 44 is hinged to the sliding bottom plate 493. The power mechanism is linked to the sliding bottom plate 493.

[0052] The vertical bag mechanism 41 includes an upper bag rotating shaft 411 hinged at both ends to the machine frame 1 and linked to the power mechanism. The upper bag rotating shaft 411 is fixedly connected with an upper bag rod 412. A rotating air gripper 413 is linked to the end of the upper bag rod 412 far from the upper bag rotating shaft 411. The power mechanism drives the upper bag rod 412 to rotate reciprocally around the central axis of the upper bag rotating shaft 411 through the upper bag rotating shaft 411.

[0053] The working principle of the upper bag device 4: The rotating air gripper 413 clamps the M-shaped bag from the upper bag suction cup 33 and transports the bag towards the bag delivery mechanism. At the same time, the bag is converted from an inclined, horizontal and other states to a vertical state. The bag delivery mechanism clamps the bag through two suction cups, and further opens the bag slightly through the opening and closing assembly. Then, through the sliding assembly, the bag is delivered to the next process of the M-shaped bag feeder-packer. Then, the rotation and translation assembly drives the opening and closing linkage frame 44 to perform a rotational lifting movement around the bearing seat 49, so that the opening and closing assembly can successfully return to the original position without interfering with the bag, and the foregoing work is repeated.

[0054] As Figures 2 to 5The described sub-clamping device 5 shown in the figure includes a left machine clamping seat 51, a right machine clamping seat 52, two sets of symmetrically structured outer sub-clamping heads 53, and two sets of symmetrically structured inner sub-clamping heads 54. The left machine clamping seat 51 and the right machine clamping seat 52 are arranged oppositely, and their adjacent end parts are respectively hinged and linked to the turntable 2. The left machine clamping seat 51 is provided with a first meshing gear set 511 on the side facing the right machine clamping seat 52 at the end hinged to the turntable 2. The right machine clamping seat 52 is provided with a second meshing gear set 521 on the side facing the left machine clamping seat 51 at the end hinged to the turntable 2, which meshes with the first meshing gear set 511. The left machine clamping seat 51 and the right machine clamping seat 52 can respectively make relative opening and closing movements around their hinged joints with the frame 1 through the first meshing gear set 511 and the second meshing gear set 521. The two sets of outer sub-clamping heads 53 are respectively located at the ends of the left machine clamping seat 51 and the right machine clamping seat 52 far from the end hinged to the turntable 2. The two sets of inner sub-clamping heads 54 are respectively placed on the left machine clamping seat 51 and the right machine clamping seat 52 and between the outer sub-clamping heads 53 and the turntable 2. The inner sub-clamping head group 54 is linked with a telescopic swing arm mechanism 55 that can simultaneously drive both the inner sub-clamping head group 54 and the outer sub-clamping head group 53 to make relative opening and closing movements.

[0055] The ends of the left machine clamping seat 51 and the right machine clamping seat 52 far from the end hinged to the turntable 2 are detachably connected with a linkage machine clamping body 57. The inner sub-clamping head group 54 and the outer sub-clamping head group 53 are installed on the linkage machine clamping body 57, and the linkage machine clamping body 57 is linked with a machine clamping swing guiding and aligning mechanism.

[0056] The machine clamping swing guiding and aligning mechanism includes a first machine clamping swing guiding and aligning rod 58 placed on the side of the left machine clamping seat 51 far from the first meshing gear set 511, and a second machine clamping swing guiding and aligning rod 59 placed on the side of the right machine clamping seat 52 far from the second meshing gear set 521. One end of the first machine clamping swing guiding and aligning rod 58 is hinged to the turntable 2, and the other end is hinged to the linkage machine clamping body 57. The closed figure formed by sequentially connecting the two hinge points at both ends of the first machine clamping swing guiding and aligning rod 58 and the two hinge points on the left machine clamping seat 51 where it is respectively hinged to the turntable 2 and the linkage machine clamping body 57 is a parallelogram (as shown by the dotted line frame in the attached Figure 5 figure). One end of the second machine clamping swing guiding and aligning rod 59 is hinged to the turntable 2, and the other end is hinged to the linkage machine clamping body 57. The closed figure formed by sequentially connecting the two hinge points at both ends of the second machine clamping swing guiding and aligning rod 59 and the two hinge points on the right machine clamping seat 52 where it is respectively hinged to the turntable 2 and the linkage machine clamping body 57 is a parallelogram (as shown by the two dotted line frames in the attached Figure 5 figure).

[0057] The outer collet group 53 includes a movable collet 531, an outer machine collet 532, an outer cylinder barrel 533, and an outer cylinder piston rod 534. The outer cylinder barrel 533 is slidably installed on the linkage machine clamp body 57. The outer machine collet 532 is relatively fixedly installed at the end of the outer cylinder barrel 533. The middle of the movable collet 531 is hinged to the outer machine collet 532, and the end of the movable collet 531 is hinged to the outer cylinder piston rod 534. The movable collet 531 makes a lever movement around the middle hinge under the drive of the outer cylinder piston rod 534. The telescopic swing arm mechanism 55 is linked with the outer machine collet 532.

[0058] The inner collet group 54 includes an inner machine collet 541, an inner cylinder barrel 542, and an inner cylinder piston rod 543. The inner cylinder barrel 542 is slidably installed on the linkage machine clamp body 57. The inner machine collet 541 is provided with an inner machine collet positioning side plate 5411 and an inner machine collet auxiliary clamping plate 5412. A clamping material gap 5413 is provided between the inner machine collet positioning side plate 5411 and the inner machine collet auxiliary side plate. The inner machine collet positioning side plate 5411 is relatively fixedly connected to the inner cylinder barrel 542. The inner cylinder piston rod 543 can make a reciprocating linear movement towards the inner machine collet auxiliary clamping plate 5412 through the inner cylinder barrel 542 and the clamping material gap 5413 in sequence. The telescopic swing arm mechanism 55 is linked with the inner machine collet 541.

[0059] The telescopic swing arm mechanism 55 includes a central connecting rod 551 whose middle is hinged to the linkage machine clamp body 57. The end of the central connecting rod 551 is linked with a first transition connecting rod 552. The end of the first transition connecting rod 552 far from the central connecting rod 551 is hinged to the inner machine collet 541. The other end of the central connecting rod 551 is linked with a second transition connecting rod 553. The end of the second transition connecting rod 553 far from the central connecting rod 551 is hinged to the outer machine collet 532. The central connecting rod 551 is coaxially hinged with a telescopic clamping connecting rod 554 at the hinge joint with the second transition connecting rod 553. The end of the telescopic clamping connecting rod 554 far from the central connecting rod 551 is hinged to a telescopic clamping swing arm 555. The other end of the telescopic clamping swing arm 555 is hinged to the frame 1. The frame 1 is provided with a telescopic drive assembly 56 on the outer periphery of the turntable 2 that can be linked with the telescopic clamping swing arm 555.

[0060] As Figures 6 to 7 shown, the telescopic drive assembly 56 includes a telescopic clamping arc plate 561, an extending clamping cam plate 562, a retracting clamping cam plate 563, an extending clamping cam 564, and a retracting clamping cam 565 placed on the outer periphery of the turntable 2 and on the side of the telescopic clamping swing arm 554. The extending clamping cam plate 562 is placed at one end of the telescopic clamping arc plate 561 and is linked with the extending clamping cam 564. The retracting clamping cam plate 563 is placed at the other end of the telescopic clamping arc plate 561. The retracting clamping cam plate 563 is linked with the retracting clamping cam 565.

[0061] Working principle of the sub-clamping device 5: Driven by a power source (pneumatic or electric can be selected according to actual situations), the left machine clamping seat 51 and the right machine clamping seat 52 make an opening and closing movement similar to that of pliers around the hinge points of the machine frame 1, accommodating the concave sides of the M-shaped bag between the left machine clamping seat 51 and the right machine clamping seat 52. The outer sub-clamping head group 53 and the inner sub-clamping head group 54 respectively clamp the front and rear edges of the concave sides of the M-shaped bag. Driven by the telescopic swing arm mechanism 55, the outer sub-clamping head group 53 and the inner sub-clamping head group 54 make a relative opening and closing movement to control the opening and closing of the M-shaped bag. Due to the action of the first machine clamping swing guide rod 58 and the second machine clamping swing guide rod 59, and the hinge points at both ends of each are sequentially and orderly connected to the hinge points of the adjacent left machine clamping seat 51 (right machine clamping seat 52) and the linkage machine clamping body 57 and the turntable 2 to form a parallelogram, so that during the process of the linkage machine clamping body 57 following the two machine clamping seats to make a rotational opening and closing, its own axis direction always remains unchanged, thus ensuring that the actual effective bag clamping distances of the outer machine clamping head group 53 and the inner machine clamping head group 54 are consistent. With the above solution, the front and rear edges of the concave sides of the M-shaped bag can be accurately clamped, avoiding interference between the left machine clamping seat 51, the right machine clamping seat 52 and the bag, and the telescopic swing arm mechanism 55 helps the M-shaped bag to be fully opened, without situations such as material waste, insufficient packaging quantity, and environmental pollution, ensuring that the packaging is filled in place, and improving the packaging speed and quality.

[0062] Working principle of the whole machine: The vertical bag feeding device 3 first feeds the bag, and then the bag loading device 4 lifts the horizontally and slightly inclined placed bag for vertical suction feeding. Then the sub-clamping device 5 clamps the bag, and driven by the turntable, it sequentially passes through the upper bag opening suction cup assembly 6, the lower bag opening suction cup assembly 7, the extension clamping cam plate 562 in the telescopic clamping assembly, the feeding assembly 8, the material poking assembly, the retraction clamping cam plate 563 in the telescopic clamping assembly, the bag closing assembly 10, and the heat sealing device 11 to complete the bag feeding and packaging of the M-shaped bag. Among them, when a group of sub-clamping devices 5 for clamping materials moves to the position of the extension clamping cam plate 562 along the effective rotation direction driven by the turntable, the extension clamping cam 564 drives the extension clamping cam plate 562 to move towards the ground direction. Driven by the extension clamping cam plate 562, the telescopic clamping swing arm 555 drives the inner sub-clamping head group 54 to move away from the outer sub-clamping head group 53 to open the bag. When this group of sub-clamping devices 5 for clamping materials continues to move to the position of the retraction clamping cam plate 563 along the effective rotation direction driven by the turntable, the retraction clamping cam 565 drives the retraction clamping cam plate 563 to move away from the ground direction. Driven by the retraction clamping cam plate 563, the telescopic clamping swing arm 555 drives the inner sub-clamping head group 54 to move towards the outer sub-clamping head group 53 to close the bag. Each group of sub-clamping devices 5 completes the work by passing through the extension clamping cam plate 562 and the retraction clamping cam plate 563 in sequence according to the above actions.

Claims

1. A fully automatic M-shaped bag feeding and packaging machine, comprising a frame. A rotatable turntable is provided in the middle of the frame. A number of groups of sub-clamping devices that can follow the turntable for synchronous turning movement are evenly distributed on the outer periphery of the turntable. A bag loading device, a bag opening device, a feeding device, and a heat sealing device are sequentially arranged on the frame along the outer periphery of the turntable. A vertical bag feeding device is provided on the side of the frame where the bag loading device is away from the turntable, and it is characterized in that: The sub-clamping device includes a left machine clamping seat, a right machine clamping seat, two sets of symmetrically structured outer sub-clamping heads, and two sets of symmetrically structured inner sub-clamping heads. The left machine clamping seat and the right machine clamping seat are oppositely arranged, and the same ends of the two are respectively hinged to the turntable. The left machine clamping seat is provided with a first meshing gear set on the side facing the right machine clamping seat at the end hinged to the turntable. The right machine clamping seat is provided with a second meshing gear set meshing with the first meshing gear set at the end hinged to the turntable. The left machine clamping seat and the right machine clamping seat can respectively make relative opening and closing movements around their respective hinge points with the turntable through the first meshing gear set and the second meshing gear set. The two sets of outer sub-clamping heads are respectively located at the ends of the left machine clamping seat and the right machine clamping seat away from the hinge points with the turntable. The two sets of inner sub-clamping heads are respectively installed on the left machine clamping seat and the right machine clamping seat and are distributed between the outer sub-clamping heads and the turntable. The turntable is equipped with a telescopic swing arm mechanism that can be linked with the outer sub-clamping heads and the inner sub-clamping heads respectively and drive the outer sub-clamping heads and the inner sub-clamping heads to make relative opening and closing movements. The ends of the left machine clamping seat and the right machine clamping seat away from the hinge points with the turntable are hinged with a linkage machine clamping body. The inner sub-clamping heads and the outer sub-clamping heads are installed on the linkage machine clamping body. The linkage machine clamping body is linked with a machine clamping swing guiding and aligning mechanism. The machine clamping swing guiding and aligning mechanism includes a first machine clamping swing guiding and aligning rod placed on the side of the left machine clamping seat away from the first meshing gear set and a second machine clamping swing guiding and aligning rod placed on the side of the right machine clamping seat away from the second meshing gear set. One end of the first machine clamping swing guiding and aligning rod is hinged to the turntable and the other end is hinged to the linkage machine clamping body. The closed figure formed by sequentially connecting the two hinge points at both ends of the first machine clamping swing guiding and aligning rod and the two hinge points on the left machine clamping seat respectively hinged to the turntable and the linkage machine clamping body is a parallelogram. One end of the second machine clamping swing guiding and aligning rod is hinged to the turntable and the other end is hinged to the linkage machine clamping body. The closed figure formed by sequentially connecting the two hinge points at both ends of the second machine clamping swing guiding and aligning rod and the two hinge points on the right machine clamping seat respectively hinged to the turntable and the linkage machine clamping body is a parallelogram. The upper bag device includes a vertical bag mechanism and a bag delivering mechanism that can receive the bags transported from the vertical bag mechanism, open and transport the bags, and is linked with a power mechanism. The bag delivering mechanism includes a first suction cup, a second suction cup, an opening and closing assembly that is linked with the first suction cup and the second suction cup respectively and can control the opening and closing of the first suction cup and the second suction cup. The bag delivering mechanism further includes a rotation and translation assembly that is linked with the opening and closing assembly and can drive the opening and closing assembly to rotate. The rotation and translation assembly is linked with a sliding assembly. The sliding assembly can drive the rotation and translation assembly and the opening and closing assembly to make reciprocating linear movements in the plane of the frame along the effective opening and closing axis direction of the opening and closing assembly.

2. The fully automatic M-shaped bag feeding and packaging machine according to claim 1, characterized in that: The outer sub-clamping head group includes a movable clamping head, an outer machine clamping head, an outer cylinder barrel, and an outer cylinder piston rod. The outer cylinder barrel is slidably and cooperatively installed on the linkage machine clamping body. The outer machine clamping head is relatively fixedly installed at the end of the outer cylinder barrel. The middle of the movable clamping head is hinged to the outer machine clamping head. The end of the movable clamping head is hinged to the outer cylinder piston rod. The movable clamping head makes a lever movement around the middle hinge point under the drive of the outer cylinder piston rod. The telescopic swing arm mechanism is linked with the outer machine clamping head.

3. The fully automatic M-shaped bag feeding and packaging machine according to claim 2, characterized in that: The inner collet group includes an inner machine collet, an inner cylinder barrel, and an inner cylinder piston rod. The inner cylinder barrel is slidably and fittingly installed on the linkage machine clamp body. The inner machine collet is provided with an inner machine collet positioning side plate and an inner machine collet auxiliary clamping plate. A material clamping gap is provided between the inner machine collet positioning side plate and the inner machine collet auxiliary clamping plate. The inner machine collet positioning side plate is fixedly connected to the inner cylinder barrel. The inner cylinder piston rod can reciprocate linearly through the inner cylinder barrel and the material clamping gap towards the inner machine collet auxiliary clamping plate. The telescopic swing arm mechanism is linked with the inner machine collet.

4. The fully automatic M-shaped bag feeding and packaging machine according to claim 3, characterized in that: The telescopic swing arm mechanism includes a central connecting rod hinged in the middle on the linkage machine clamp body. The end of the central connecting rod is linked with a first transition connecting rod. The end of the first transition connecting rod away from the central connecting rod is hinged to the inner machine collet. The other end of the central connecting rod is linked with a second transition connecting rod. The end of the second transition connecting rod away from the central connecting rod is hinged to the outer machine collet. A telescopic clamping connecting rod assembly is coaxially hinged at the end of the central connecting rod where it is hinged to the second transition connecting rod. The telescopic clamping connecting rod assembly is linked with a telescopic clamping swing arm. The end of the telescopic clamping swing arm is hinged to the turntable. A telescopic driving component that can be linked with the telescopic clamping swing arm is provided on the outer periphery of the turntable of the frame.

5. The fully automatic M-shaped bag bagging packaging machine according to claim 4, characterized in that: The telescopic driving component includes a telescopic clamping arc plate, an extending clamping cam plate, a retracting clamping cam plate, an extending clamping cam, and a retracting clamping cam placed on the outer periphery of the turntable and on the side of the telescopic clamping swing arm. The extending clamping cam plate is placed at one end of the telescopic clamping arc plate and is linked with the extending clamping cam. The retracting clamping cam plate is placed at the other end of the telescopic clamping arc plate. The retracting clamping cam plate is linked with the retracting clamping cam.

6. The fully automatic M-shaped bag bagging and packaging machine according to claim 1, wherein: The opening and closing component includes an opening and closing linkage frame. A lead screw mechanism and a first servo motor linked with the lead screw mechanism are installed at the end of the opening and closing linkage frame. The lead screw mechanism is threadedly linked in sequence along its own axis with a first slider linked with a first suction cup and a second slider linked with a second suction cup. The first servo motor can drive the first slider and the second slider to move relatively and open and close through the lead screw mechanism. Guide rods are symmetrically distributed on both sides of the lead screw mechanism of the opening and closing linkage frame. The two ends of the guide rods are slidably and fittingly connected with the first slider and the second slider respectively. The end of the opening and closing linkage frame away from the installation position of the lead screw mechanism is linked with a rotation and translation component.

7. The fully automatic M-shaped bag feeding and packaging machine according to claim 6, characterized in that: The rotation and translation component includes a bearing seat fixedly connected to the sliding component. The end of the opening and closing linkage frame away from the installation position of the lead screw mechanism is hinged to the bearing seat. A cylinder is fixedly connected to the opening and closing linkage frame and is distributed between the bearing seat and the guide rod. The end of the cylinder away from the opening and closing linkage frame is linked with the sliding component. The opening and closing linkage frame makes a reciprocating rotation around the bearing seat under the drive of the cylinder.

8. The fully automatic M-shaped bag feeding and packaging machine according to claim 7, characterized in that: The sliding component includes a guide rail fixedly installed on the frame and a sliding bottom plate slidably linked with the guide rail. The bearing seat is fixedly installed on the sliding bottom plate. The end of the cylinder away from the opening and closing linkage frame is hinged to the sliding bottom plate. The power mechanism is linked with the sliding bottom plate.

9. The full-automatic M-shaped bag feeding and packaging machine according to claim 1, wherein: The vertical bag mechanism includes an upper bag rotating shaft hinged at both ends to the machine frame and linked to the power mechanism. An upper bag rod is fixedly connected to the upper bag rotating shaft. A rotating air gripper is linked to the end of the upper bag rod away from the upper bag rotating shaft. The power mechanism drives the upper bag rod to reciprocally rotate around the central axis of the upper bag rotating shaft through the upper bag rotating shaft.

10. A fully automatic M-shaped bag feeding and packaging machine according to claim 1, characterized in that: The vertical bag feeding device includes two groups of symmetrically arranged bag bin side plates and a bag support plate placed between the two groups of bag bin side plates. An upper bag suction cup capable of sucking the bags in the bag support plate is provided above the bag bin side plates. The bag support plate is linked to a lifting cross bar. The lifting cross bar is slidably connected to a bag bin guiding column fixedly installed on the machine frame. The end of the lifting cross bar is linked to a second servo motor. The second servo motor can drive the bag support plate to reciprocally move linearly along the axis direction of the bag bin guiding column through the lifting cross bar. The bag bin side plate is provided with a relief groove corresponding to the lifting cross bar.

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