Cup stacking machine capable of stably and accurately stacking plastic containers

Abstract

A cup stacking machine capable of stably and accurately stacking plastic containers comprises a machine frame, a cup taking and placing mechanism, a stacking mechanism, a transferring mechanism and a sending-out mechanism, the cup taking and placing mechanism, the stacking mechanism, the transferring mechanism and the sending-out mechanism are installed on the machine frame, and a cup taking station, a stacking station and a transferring station are sequentially arranged on the machine frame from one side to the other side in the longitudinal direction of the machine frame. The rack is provided with a first movement track extending from the stacking station to the transferring station and a second movement track extending from the position below the transferring station to the position below the stacking station, and the first movement track is located above the second movement track. Due to the fact that the cup taking device is carried when the middle stable taking and placing unit stably moves above the middle of the stacking mechanism, the cup taking device is effectively prevented from greatly shaking in the moving process; the two movable stacking units are adopted to drive the cup stacking device to alternately stay at the stacking station and the transferring station, the working efficiency can be effectively improved, and the quality of plastic container stack finished products obtained through stacking is guaranteed.

Description

Technical Field

[0001] The utility model relates to a cup stacking machine which can stack plastic containers stably and accurately. Background Art

[0002] At present, there are two types of plastic container cup making machines: one is a flip molded cup machine. After the air pressure thermoforming cup making machine automatically and quickly completes the shaping and punching, the lower mold body flips 90 degrees, and the cup bottom rod pushes the cup in the mold cavity out of the mold cavity to automatically stack and count the cups; however, the price of this equipment is particularly expensive, and due to the influence of the specifications and cavity number distance of the lateral mold cavity, the dense stacked cups, and the influence of the stacked cup guide frame, it is impossible to spot check the product quality in time. The other is a thermoforming cup making machine whose lower mold body cannot be flipped. Its upper mold body is fixed, and the lower mold body is raised and lowered. When it is lowered into place, the mold is closed, the shaping and punching are completed, and the mold is opened. When the lower mold body is in place, the cup bottom rod pushes the cup out of the mold cavity, and the high-pressure gas blows the cup out of the mold body. This air pressure thermoforming cup making machine that cannot flip the mold has similar production efficiency and cup making quality as the flip molded cup machine, but the price is one twentieth of the flip molded cup machine. Its disadvantage is that it cannot complete automatic counting and automatic cup stacking. At the same time, this cup making machine opens the mold after forming, punching and shearing, the mold bottom pushes the container out of the mold cavity, and the air pressure blows the cup out of the mold body and scatters it to the cup inspection position, and then the cup is inspected manually.

[0003] In order to solve the above problems, the commonly used cup stacking machine for plastic containers usually uses a robot to take out all the plastic containers in the mold of the molding machine at the same time, and then stack them into a long plastic container pile, and then send them out for packaging, so as to obtain the plastic container packaging we often see on the market. However, the disadvantage of this cup stacking method is that the mold of the molding machine usually has a large number of plastic containers, which are arranged in an array (such as 5 rows and 6 columns, 8 rows and 9 columns, etc.), and the action end of the robot is usually set on one side of the frame. The cup holder needs to be connected to the action end of the robot through a long arm. Therefore, the cup holder is prone to shaking during operation, which affects the accuracy of the cup taking action and easily causes the plastic container to be skewed, fall off, or unable to be taken out.

[0004] For example, a counting and stacking machine disclosed in a Chinese patent document with publication number CN103086160A and name “Automatic High-speed Cup Picking Counting and Stacking Machine” has a cup picking rack connected to the action end of the manipulator through a long arm. Therefore, the cup picking rack is prone to shaking during operation, affecting the accuracy of the cup picking action, and easily causing the plastic containers to be skewed, dropped, or unable to be taken out. Moreover, the plastic containers are prone to misalignment during the stacking operation, so that the stacking fails completely, the plastic container is stuck on the cup mouth of the next plastic container, and the plastic container stack overturns. Moreover, the number and height of the plastic containers in the plastic container stack are greatly limited (i.e., the semi-finished plastic container stack). After being transferred to the packaging station, they need to be manually stacked and counted again to obtain a finished plastic container stack with a sufficient number of plastic containers before packaging. The work efficiency is low, so this technology cannot meet the needs of large-scale industrial production. Utility Model Content

[0005] The purpose of the utility model is to provide a cup stacking machine that can stack plastic containers steadily and accurately. The cup stacking machine has a reasonable structure and can steadily complete the work of taking and placing cups, and stack plastic containers into finished plastic container stacks before sending them out. The technical solution adopted is as follows:

[0006] A cup stacking machine capable of stacking plastic containers stably and accurately comprises a frame and a cup taking and placing mechanism, a stacking mechanism, a transfer mechanism and a delivery mechanism respectively mounted on the frame, wherein the frame is provided with a cup taking station, a stacking station and a transfer station in sequence from one side to the other side along the longitudinal direction of the frame, and the frame is provided with a first motion track extending from the stacking station to the transfer station and a second motion track extending from below the transfer station to below the stacking station, wherein the first motion track is located above the second motion track;

[0007] The stacking mechanism comprises two movable stacking units, the two movable stacking units respectively move alternately along a first motion track and a second motion track, each movable stacking unit has a cup stacking device, the cup stacking device has a plurality of rows of cup stacking rack groups, each row of the cup stacking rack group has a plurality of cup stacking racks, and all the cup stacking rack groups have the same number of cup stacking racks;

[0008] The cup taking and placing mechanism comprises

[0009] The middle stable pick-and-place unit moves back and forth steadily along the longitudinal direction of the frame above the middle of the stacking mechanism and between the cup picking station and the stacking station;

[0010] The cup taking device moves with the middle stable taking and placing unit, takes out multiple plastic containers from the mold of the molding machine at the cup taking station at the same time and smoothly, and puts them into the cup stacking device at the stacking station for stacking;

[0011] Transfer agencies include

[0012] The transfer unit includes a row of transfer cup rack groups, the transfer cup rack group has a plurality of transfer cup racks, and the number of the transfer cup racks and the cup racks of any row of cup rack groups of the cup stacking device are the same and correspond one to one, each transfer cup rack is located directly above the motion track of the corresponding cup rack, and the transfer cup rack group has a vertical state and a horizontal state;

[0013] The plastic container stack semi-finished product pushing unit pushes the plastic container stack semi-finished products in a row of cup stacking racks corresponding to the transfer cup racks in the cup stacking device from bottom to top and respectively sends them to the corresponding transfer cup racks in a vertical state;

[0014] Sending agencies include

[0015] The finished plastic container stack delivery unit pushes all the finished plastic container stacks in the transfer cup rack group in a horizontal state outward along the longitudinal direction of the rack.

[0016] In a preferred solution, the movable stacking unit also includes a track-type moving structure and a cup stacking device lifting device, the track-type moving structure is installed on the frame, the cup stacking device lifting device is installed on the track-type moving structure, and the cup stacking device is installed on the cup stacking device lifting device, the track-type moving structure drives the cup stacking device lifting device and the cup stacking device to reciprocate continuously, the cup stacking device lifting device alternately rises and falls, and the cup stacking device alternately moves along the first motion trajectory and the second motion trajectory.

[0017] A better solution is that the central smooth picking and placing unit includes a smooth vertical lifting structure and a smooth longitudinal telescopic structure. The smooth vertical lifting structure includes a lifting frame, a lifting frame driving mechanism, and two vertical tracks. The two vertical tracks are respectively installed on the front and rear sides of the frame. The two sides of the lifting frame can be slidably mounted on the two vertical tracks. The lifting frame driving mechanism adopts a servo motor to synchronously drive two synchronous belts to move through a synchronous shaft. The two synchronous belts drive the two sides of the lifting frame to move along the two vertical tracks respectively; the smooth longitudinal telescopic structure adopts a servo motor to drive multiple rollers to rotate, all of the rollers are in rolling contact with a longitudinal telescopic groove that can slide along the longitudinal direction of the frame, driving the longitudinal telescopic groove to slide along the longitudinal direction of the frame, and the cup taking device is installed on the bottom surface of the longitudinal telescopic groove.

[0018] A better solution is that the cup picking device includes a cup picking rack and multiple vacuum suction cups respectively connected to an external vacuum pumping device, the cup picking rack is installed on the middle stable picking and placing unit, and the top ends of the connecting rods of all the vacuum suction cups are respectively installed on the cup picking rack.

[0019] A better solution is that the transfer unit also includes a swinging structure, which includes a driving member and a swinging frame. The swinging frame is rotatably mounted on the frame, a row of transfer cup racks are mounted on the swinging frame, the driving member is mounted on the frame, and the driving member drives the swinging frame to swing between a vertical state and a horizontal state.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows: due to the improvement of the cup picking and placing mechanism, a middle stable picking and placing unit is adopted to carry the cup picking device while moving steadily above the middle part of the stacking mechanism, thereby effectively avoiding large shaking of the cup picking device during movement; two movable stacking units are adopted to carry the cup stacking device to alternately stay at the stacking station and the transfer station, so that the cup picking and placing mechanism and the transfer mechanism do not need to wait for the cup stacking device, which can effectively improve the work efficiency; and the overall structural design divides the stacking work into two steps: the cup picking and placing mechanism at the stacking station completes the work of stacking plastic containers into semi-finished plastic container stacks, and the semi-finished plastic container stack pushing unit at the transfer station completes the work of stacking the semi-finished plastic container stacks into finished plastic container stacks in sequence, so that the stacking of the finished plastic container stacks can be completely completed automatically by the equipment, which not only improves the work efficiency but also ensures the quality of the stacked finished plastic container stacks. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0022] Figure 2 yes Figure 1 A schematic diagram of another angle of the embodiment shown without the delivery mechanism;

[0023] Figure 3 yes Figure 2 A schematic diagram of the structure of the cup taking and placing mechanism;

[0024] Figure 4 yes Figure 1 A schematic structural diagram of a movable stacking unit of the illustrated embodiment;

[0025] Figure 5 yes Figure 1 A schematic diagram of the structure of the transfer mechanism of the illustrated embodiment;

[0026] Figure 6 yes Figure 1 A schematic structural diagram of a finished plastic container stack delivery unit of the illustrated embodiment;

[0027] Figure 7 yes Figure 1 Schematic diagram of the first motion trajectory and the second motion trajectory of the illustrated embodiment. DETAILED DESCRIPTION

[0028] like Figure 1-7As shown, a cup stacking machine capable of stacking plastic containers stably and accurately in one embodiment of the present application comprises a frame 1 and a cup taking and placing mechanism 2, a stacking mechanism 3, a transfer mechanism 4, and a delivery mechanism 5 respectively mounted on the frame 1, wherein the frame 1 is provided with a cup taking station A, a stacking station B, and a transfer station C in sequence from one side to the other side along the longitudinal direction of the frame 1, and the frame 1 is provided with a first motion track D extending from the stacking station B to the transfer station C, and a second motion track E extending from below the transfer station C to below the stacking station B, and the first motion track D is located above the second motion track E;

[0029] The stacking mechanism 3 includes two movable stacking units 301, which move alternately along a first motion track D and a second motion track E respectively, and each movable stacking unit 301 has a cup stacking device 3011, and the cup stacking device 3011 has a plurality of rows of cup stacking rack groups 30111, and each row of the cup stacking rack group 30111 has a plurality of cup stacking racks 301111, and the number of cup stacking racks 301111 in all the cup stacking rack groups 30111 is the same;

[0030] The cup taking and placing mechanism 2 comprises

[0031] The middle stable pick-and-place unit 201 reciprocates smoothly along the longitudinal direction of the frame 1 above the middle of the stacking mechanism 3 and between the cup picking station A and the stacking station B;

[0032] The cup taking device 202 moves with the middle stable taking and placing unit 201, and simultaneously and steadily takes out a plurality of plastic containers from the mold of the molding machine at the cup taking station A, and stacks them in the cup stacking device 3011 at the stacking station B;

[0033] The transfer mechanism 4 includes

[0034] The transfer unit 401 includes a row of transfer cup racks 4011, wherein the transfer cup racks 4011 have a plurality of transfer cup racks 40111, and the number of the transfer cup racks 40111 and the cup stacking racks 301111 of any row of the cup stacking racks 30111 of the cup stacking device 3011 are the same and correspond one to one, and each transfer cup rack 40111 is located directly above the motion track of the corresponding cup stacking rack 301111, and the transfer cup rack group 4011 has a vertical state and a horizontal state;

[0035] The semi-finished plastic container stack push unit 402 pushes the semi-finished plastic container stack in a row of cup stacking racks 30111 corresponding to the transfer cup racks 4011 in the cup stacking device 3011 from bottom to top and sends them to the corresponding transfer cup racks 40111 in a vertical state respectively;

[0036] The delivery mechanism 5 includes

[0037] The finished plastic container stack delivery unit 501 pushes all the finished plastic container stacks in the horizontal transfer cup rack group 4011 toward the outside of the rack 1 along the longitudinal direction of the rack 1 .

[0038] like Figure 4 As shown, an optional embodiment of the present application, the movable stacking unit 301 also includes a track-type moving structure 3012 and a cup stacking device lifting device 3013, the track-type moving structure 3012 is installed on the frame 1, the cup stacking device lifting device 3013 is installed on the track-type moving structure 3012, and the cup stacking device 3011 is installed on the cup stacking device lifting device 3013, the track-type moving structure 3012 drives the cup stacking device lifting device 3013 and the cup stacking device 3011 to reciprocate continuously, the cup stacking device lifting device 3013 alternately rises and falls, and the cup stacking device 3011 moves alternately along the first motion trajectory D and the second motion trajectory E.

[0039] like Figure 3 As shown, an optional embodiment of the present application, the middle stable pick-and-place unit 201 includes a stable vertical lifting structure 2011 and a stable longitudinal telescopic structure 2012. The stable vertical lifting structure 2011 includes a lifting frame 20111, a lifting frame driving mechanism 20112, and two vertical rails 20113. The two vertical rails 20113 are respectively installed on the front and rear sides of the frame 1. The two sides of the lifting frame 20111 can be slidably mounted on the two vertical rails 20113. The lifting frame driving mechanism 20112 adopts a servo motor. Two synchronous belts are synchronously driven to move through a synchronous shaft, and the two synchronous belts respectively drive the two sides of the lifting frame 20111 to move along two vertical rails 20113; the smooth longitudinal telescopic structure 2012 adopts a servo motor 20121 to drive multiple rollers 201211 to rotate, and all rollers 201211 are in rolling contact with a longitudinal telescopic groove 20122 that can slide longitudinally along the frame 1, driving the longitudinal telescopic groove 20122 to slide longitudinally along the frame 1, and the cup picking device 202 is installed on the bottom surface of the longitudinal telescopic groove 20122.

[0040] like Figure 3 As shown, an optional embodiment of the present application, the cup picking device 202 includes a cup picking rack 2021 and a plurality of vacuum suction cups 2022 respectively connected to an external vacuum pumping device, the cup picking rack 2021 is installed on the middle stable picking and placing unit 201, and the top ends of the connecting rods of all the vacuum suction cups 2022 are respectively installed on the cup picking rack 2021.

[0041] In an optional embodiment of the present application, the cup picking and placing mechanism 2 also includes a cup shaking device, which is installed on the frame and arranged below the stacking station B.

[0042] like Figure 5As shown, an optional embodiment of the present application, the transfer unit 401 also includes a swing structure 4012, the swing structure 4012 includes a driving member 40121 and a swing frame 40122, the swing frame 40122 is rotatably mounted on the frame 1, a row of transfer cup rack groups 4011 are mounted on the swing frame 40122, the driving member 40121 is mounted on the frame 1 and the driving member 40121 drives the swing frame 40122 to swing between a vertical state and a horizontal state.

[0043] like Figure 5 As shown, in an optional embodiment of the present application, the driving member 40121 is a cylinder.

[0044] like Figure 6 As shown, an optional embodiment of the present application, the plastic container stack finished product delivery unit 501 includes a longitudinal pushing structure 5011, a toggle rod frame 5012, a toggle rod frame lifting member 5013, and a sliding frame 5014, the sliding frame 5014 is slidably arranged on the frame 1, the longitudinal pushing structure 5011 is installed on the frame 1, the toggle rod frame lifting member 5013 is installed on the sliding frame 5014, the toggle rod frame 5012 is installed on the toggle rod frame lifting member 5013, the longitudinal pushing structure 5011 drives the sliding frame 5014 to move longitudinally along the frame 1, and the toggle rod frame lifting member 5013 drives the toggle rod frame 5012 to rise and fall.

[0045] like Figure 1 As shown, in an optional embodiment of the present application, the delivery mechanism 5 also includes a plastic container stack finished product receiving structure 502, and the plastic container stack finished product receiving structure 502 is arranged on the outside of the frame 1 and at the exit of the plastic container stack finished product delivery unit 501.

[0046] Combine the following Figure 1-7 The working process of this embodiment is introduced:

[0047] 1. The cup-taking and placing mechanism 2 works, taking out all the plastic containers in the mold of the molding machine at the cup-taking station A at the same time, and then carrying them to the top of the stacking station B, and then putting these plastic containers downward into each cup stacking rack 301111 of the cup stacking device 3011 of the movable stacking unit 301 located at the stacking station B, and repeating this operation several times until a sufficient number of plastic containers are stacked in each cup stacking rack 301111 to form a semi-finished plastic container stack;

[0048] 2. The movable stacking unit 301 at the stacking station B moves its cup stacking device 3011 to the transfer station C. Meanwhile, the movable stacking unit 301 at the transfer station C moves its cup stacking device 3011 to the stacking station B. The specific actions are as follows: the movable stacking unit 301 at the transfer station C first lowers its cup stacking device 3011 to the second motion track E, then moves to the bottom of the stacking station B, and then rises to the stacking station B.

[0049] 3. The movable stacking unit 301 located at the stacking station B goes to step 1; at the same time, the cup stacking device 3011 of the movable stacking unit 301 located at the transfer station C performs intermittent motion, and sequentially sends each row of the cup stacking rack group 30111 to the bottom of the transfer cup rack group 4011 of the transfer unit 401 in a vertical state, and the semi-finished plastic container stack pushing unit 402 pushes all the semi-finished plastic container stacks of each row of the cup stacking rack group 30111 from bottom to top into each corresponding transfer cup rack 40111 of the transfer cup rack group 4011, and obtains a plurality of finished plastic container stacks;

[0050] 4. The transfer cup rack group 4011 of the transfer unit 401 rotates to a horizontal state, and all the finished plastic container stacks in the transfer cup rack group 4011 are pushed out along the longitudinal direction of the rack 1 toward the outside of the rack 1 and sent to the finished plastic container stack receiving structure 502, and then the transfer cup rack group 4011 of the transfer unit 401 rotates back to a vertical state.

[0051] This cycle is repeated to continuously complete the stacking and delivery of the plastic containers of the finished machine mold.

[0052] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. The technical personnel of the technical field to which the utility model belongs can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A cup stacking machine capable of stacking plastic containers stably and accurately, characterized in that: The machine comprises a frame and a cup-taking and placing mechanism, a stacking mechanism, a transfer mechanism and a delivery mechanism respectively mounted on the frame. The frame is provided with a cup-taking station, a stacking station and a transfer station in sequence from one side to the other side along the longitudinal direction of the frame. The frame is provided with a first motion track extending from the stacking station to the transfer station and a second motion track extending from below the transfer station to below the stacking station. The first motion track is located above the second motion track. The stacking mechanism comprises two movable stacking units, the two movable stacking units respectively move alternately along a first motion track and a second motion track, each movable stacking unit has a cup stacking device, the cup stacking device has a plurality of rows of cup stacking rack groups, each row of the cup stacking rack group has a plurality of cup stacking racks, and all the cup stacking rack groups have the same number of cup stacking racks; The cup taking and placing mechanism comprises The middle stable pick-and-place unit moves back and forth steadily along the longitudinal direction of the frame above the middle of the stacking mechanism and between the cup picking station and the stacking station; The cup taking device moves with the middle stable taking and placing unit, takes out multiple plastic containers from the mold of the molding machine at the cup taking station at the same time and smoothly, and puts them into the cup stacking device at the stacking station for stacking; Transfer agencies include The transfer unit includes a row of transfer cup rack groups, the transfer cup rack group has a plurality of transfer cup racks, and the number of the transfer cup racks and the cup racks of any row of cup rack groups of the cup stacking device are the same and correspond one to one, each transfer cup rack is located directly above the motion track of the corresponding cup rack, and the transfer cup rack group has a vertical state and a horizontal state; The plastic container stack semi-finished product pushing unit pushes the plastic container stack semi-finished products in a row of cup stacking racks corresponding to the transfer cup racks in the cup stacking device from bottom to top and respectively sends them to the corresponding transfer cup racks in a vertical state; Sending agencies include The finished plastic container stack delivery unit pushes all the finished plastic container stacks in the transfer cup rack group in a horizontal state outward along the longitudinal direction of the rack.

2. The cup stacking machine according to claim 1, characterized in that: The movable stacking unit also includes a track-type moving structure and a cup stacking device lifting device. The track-type moving structure is installed on the frame, the cup stacking device lifting device is installed on the track-type moving structure, and the cup stacking device is installed on the cup stacking device lifting device. The track-type moving structure drives the cup stacking device lifting device and the cup stacking device to reciprocate continuously, and the cup stacking device lifting device alternately rises and falls, so that the cup stacking device alternately moves along the first motion trajectory and the second motion trajectory.

3. The cup stacking machine according to claim 1, characterized in that: The central smooth picking and placing unit includes a smooth vertical lifting structure and a smooth longitudinal telescopic structure. The smooth vertical lifting structure includes a lifting frame, a lifting frame driving mechanism, and two vertical tracks. The two vertical tracks are respectively installed on the front and rear sides of the frame. The two sides of the lifting frame can be slidably mounted on the two vertical tracks. The lifting frame driving mechanism adopts a servo motor to synchronously drive two synchronous belts to move through a synchronous shaft. The two synchronous belts drive the two sides of the lifting frame to move along the two vertical tracks respectively; the smooth longitudinal telescopic structure adopts a servo motor to drive multiple rollers to rotate, all of the rollers are in rolling contact with a longitudinal telescopic groove that can slide along the longitudinal direction of the frame, driving the longitudinal telescopic groove to slide along the longitudinal direction of the frame, and the cup taking device is installed on the bottom surface of the longitudinal telescopic groove.

4. The cup stacking machine according to claim 1, characterized in that: The cup picking device comprises a cup picking rack and a plurality of vacuum suction cups respectively connected to an external vacuum pumping device; the cup picking rack is mounted on the middle stable picking and placing unit; and the top ends of the connecting rods of all the vacuum suction cups are respectively mounted on the cup picking rack.

5. The cup stacking machine according to claim 1, characterized in that: The cup picking and placing mechanism also includes a cup shaking device, which is installed on the frame and arranged below the stacking station.

6. The cup stacking machine according to any one of claims 1 to 5, characterized in that: The transfer unit also includes a swing structure, which includes a driving member and a swing frame. The swing frame is rotatably mounted on the frame, a row of transfer cup racks is mounted on the swing frame, the driving member is mounted on the frame, and the driving member drives the swing frame to swing between a vertical state and a horizontal state.

7. The cup stacking machine according to claim 6, characterized in that: The driving member is a cylinder.

8. The cup stacking machine according to claim 1, characterized in that: The plastic container stack finished product delivery unit includes a longitudinal pushing structure, a toggle rod frame, a toggle rod frame lifting member, and a sliding frame. The sliding frame can be slidably arranged on the frame, the longitudinal pushing structure is installed on the frame, the toggle rod frame lifting member is installed on the sliding frame, and the toggle rod frame is installed on the toggle rod frame lifting member. The longitudinal pushing structure drives the sliding frame to move longitudinally along the frame, and the toggle rod frame lifting member drives the toggle rod frame to rise and fall.

9. The cup stacking machine according to claim 8, characterized in that: The delivery mechanism also includes a plastic container stack finished product receiving structure, which is arranged outside the frame and at the exit of the plastic container stack finished product delivery unit.

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