Automatic ring-fitting device for fresh-keeping lunch box and processing method thereof

Abstract

The invention discloses an automatic ring-fitting device for a fresh-keeping lunch box and a processing method thereof, and relates to the technical field of lunch box processing, comprising a machine platform and a pressing platform, which is installed on the table top of the machine platform, and a tensioning mechanism is elastically installed in the pressing platform, support frames are symmetrically installed at both ends of the tensioning mechanism, and a sealing ring clamping piece is symmetrically slidably installed on the outer side of the support frame, an opening for a pair of support frames to move is opened on the top of the pressing platform, a push-pushing component is elastically slidably connected with the outer side of the support frame, and the push-pushing component is abutted and matched with the sealing ring clamping piece, a lifting frame abutted with the bottom of the push-pushing component is hinged in the support frame, and a guiding inclined groove matched with the lifting frame is opened on the pressing platform, and the box cover squeezes the push-pushing component to force the sealing ring clamping piece to move away. The invention clamps the sealing ring when the support frame opens the sealing ring by arranging the sealing ring clamping piece, so as to prevent the sealing ring from bouncing off the table top of the pressing platform during the deformation process, thereby clamping the sealing ring.

Description

Technical Field

[0001] The invention relates to the technical field of lunch box processing, in particular to an automatic ring-fitting device for a fresh-keeping lunch box and a processing method thereof. Background Art

[0002] A lunch box is a box specially used to hold meals, also known as a bento box. In order to ensure its freshness and heat preservation effects, a sealing ring is usually nested in the lid of the box. Therefore, the lunch box requires a ring-putting process during the processing to complete the assembly operation between the sealing ring and the lid.

[0003] The patent publication number of the existing patent application is: CN111644832A, and the publication date is September 11, 2020. The name of the patent is "A sealing ring installation device", which includes a frame, a pushing mechanism and a bearing seat. The bearing seat includes a top support member and a movable member. The top support member is fixedly connected to the frame, and the movable member is movably arranged on the frame. A through groove is opened on the movable member, and the top support member is inserted into the through groove. The top surface of the top support member and the side wall of the through groove form a positioning groove. The positioning groove can accommodate the sealing ring and position the sealing ring. The pushing mechanism is arranged on the frame, and the pushing mechanism can push the product to be installed to approach and press the movable member. The sealing ring installation device proposed by the present invention can realize automatic installation of the sealing ring, save manpower, improve work efficiency, and ensure that the installation result is accurate and reliable.

[0004] The above application has shortcomings. The sealing ring generally needs to be adapted to the groove of the lunch box lid with which it is assembled. Therefore, the sealing ring needs to be stretched and deformed before assembly so that the sealing ring can be just stuck in the lid. When stretching the sealing ring, if the operation is improper or the structure for fixing the sealing ring does not operate normally, it is easy to cause the sealing ring to loosen during the stretching process. In addition, during a complete assembly process, the fixing structure needs to switch back and forth between fixing and loosening. In order to make the structure for fixing the sealing ring automatically tighten and loosen, adding induction control elements and a separate power source will undoubtedly increase the assembly cost and make subsequent maintenance troublesome. At the same time, after the sealing ring is fully stretched, the friction of the part in contact with the sealing ring increases, making it difficult to detach the lid after the lid is assembled with the sealing ring, affecting the assembly time. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic ring-fitting device for a fresh-keeping lunch box and a processing method thereof, so as to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The cam is secured to the bottom of the cam and is adapted to engage with the sealing ring when the cam is in a position to move relative to the support frame.

[0008] Preferably, a box cover conveying and handling mechanism and a sealing ring conveying mechanism are installed on the machine platform, and the pressing station is located between the box cover conveying and handling mechanism and the sealing ring conveying mechanism.

[0009] Preferably, the box cover conveying and handling mechanism includes a conveyor belt and a rotating disk, a plurality of positioning jigs are distributed in a ring on the top of the rotating disk, an arm is installed between the rotating disk and the pressing table, and a pressing robot arm is slidably installed on the arm.

[0010] Preferably, an air valve vibration unloading tray and an air valve pressing mechanism are installed on the machine platform, and the air valve pressing mechanism is located between the air valve vibration unloading tray and the rotating turntable.

[0011] Preferably, a mounting seat is movably installed in the press-fitting table, a plurality of telescopic rods are fixedly connected between the mounting seat and the bottom of the inner wall of the press-fitting table, a buffer spring is sleeved on the telescopic rod, and the tensioning mechanism includes a connecting seat fixed to the top of the mounting seat, and electric push rods are respectively installed between the connecting seat and the two support frames.

[0012] Preferably, the sealing ring clamp includes a connecting rod, one end of the connecting rod is fixedly connected to a clamping frame, a guide accommodating groove for the movement of the clamping frame is provided on the outer edge of the top of the support frame, the other end of the connecting rod is fixedly connected to an anti-slip rod, the support frame is provided with an inverted L-shaped groove matched with the anti-slip rod, and a through groove matched with the connecting rod is provided on the outer side of the inverted L-shaped groove.

[0013] Preferably, the push-pushing assembly includes a pressure plate, one side of which is slidably connected to the support frame, a top rod is horizontally fixedly connected to the top of the pressure plate, the top rod is located above the support frame, a pair of return springs are installed between the bottom of the pressure plate and the support frame, a through hole is opened through the pressure plate, a wedge-shaped pressure block is fixedly connected to the top of the inner wall of the through hole, and a wedge-shaped pressure block is fixedly connected to the top of the connecting rod in the through hole, which is against the wedge-shaped pressure block, and when the wedge pressure block presses down the wedge-shaped pressure block, the anti-slip rod moves along the horizontal section of the inverted L-shaped groove to the vertical section.

[0014] Preferably, arc-shaped positioning rods are symmetrically installed on the outer edge of the top of the support frame, and a plug-in groove adapted to the top rod is opened between the two arc-shaped positioning rods on the top surface of the support frame.

[0015] Preferably, the lifting rack includes a pair of curved levers respectively hinged to the support frame, one end of the two curved levers is against the bottom of the push-pushing assembly, and the other ends of the two curved levers are horizontally fixedly connected to the same cross bar. When the cross bar enters the guide inclined groove, the curved levers rotate and lift the push-pushing assembly.

[0016] A method for automatically putting a ring on a fresh-keeping lunch box, using the above-mentioned automatic putting a ring on a fresh-keeping lunch box device, comprises the following steps:

[0017] S1. First, place the sealing ring on the press-fitting table, and then use the tensioning mechanism to drive the supports on both sides to stretch the sealing ring outwards. The sealing ring clamping piece clamps the edge of the sealing ring during the process of stretching the sealing ring, so that the sealing ring forms a shape that matches the box cover;

[0018] S2, move the box cover to the top of the formed sealing ring, and then press it down vertically. When the box cover squeezes and pushes the top pressing component, it will force the sealing ring clamp to move away, and then the box cover completely presses the sealing ring, so that the sealing ring is embedded in the groove at the bottom of the cover;

[0019] S3. When the assembly is completed, the tensioning mechanism is used to control the two side supports 4 to move closer to each other. At this time, one end of the ejector frame 7 enters the guiding inclined groove. In the process of the two side supports moving closer to each other, the pushing and pressing components on each support frame will also be lifted by the ejector frame 7 to assist demoulding.

[0020] The sealing ring is clamped on the support frame when the support frame opens the sealing ring, thereby preventing the sealing ring from bouncing off the table top of the pressing table during the deformation process, and playing a clamping role for the sealing ring. In the process of pressing the box cover down, the pushing and pressing assembly will be pressed first, so that the pushing and pressing assembly will force the sealing ring clamping piece to move away from the sealing ring, and then the sealing ring clamping piece will enter the support frame to prevent the sealing ring clamping piece from affecting the pressing operation between the sealing ring and the box cover, so that the box cover and the sealing ring are tightly pressed together. After the assembly is completed, the tensioning mechanism drives the support frames on both sides to move closer to each other to loosen the box cover. In order to avoid the friction between the assembled box cover and the support frame being too large and resulting in the inability to quickly remove it, the support frames on both sides can be further moved closer to each other. After one end of the lifting frame enters the guide inclined slot, the angle of the lifting frame is changed through the guide inclined slot, and the lifting frame is used to lift the pushing and pressing assembly, so that the pushing and pressing assembly supports the lunch box from below, thereby assisting when removing the material and improving the assembly efficiency.

[0021] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0022] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of an automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of a press-fitting platform in an automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0026] Figure 3 It is a schematic diagram of the overall structure of a press-fitting platform in an automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0027] Figure 4 It is a structural schematic diagram of a pressing platform in an automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0028] Figure 5 It is a schematic diagram of the connection between the tensioning mechanism and the support frame in the automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0029] Figure 6It is a schematic diagram of the connection between the tensioning mechanism and the support frame in the automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0030] Figure 7 It is a schematic diagram of the connection between the support frame, the sealing ring clamping piece and the lifting rack in the automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0031] Figure 8 It is a schematic diagram of the connection between the support frame, the sealing ring clamping piece and the lifting rack in the automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0032] Fig. 9 This is an enlarged view of point A of an automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0033] Fig.10 It is a schematic diagram of the connection between the support frame and the material lifting frame in the automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0034] Fig.11 It is a schematic diagram of the connection between the push-pushing assembly and the sealing ring clamping member in the automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0035] Fig.12 It is a structural schematic diagram of a material ejecting frame in an automatic ring-fitting device for a fresh-keeping lunch box of the present invention;

[0036] Fig.13 The figure is an overall schematic diagram of another embodiment of the automatic ring-fitting device for a fresh-keeping lunch box of the present invention.

[0037] Description of reference numerals:

[0038] 1. Machine; 2. Pressing table; 201. Opening; 202. Guide chute; 203. Mounting seat; 204. Telescopic rod; 205. Buffer spring; 206. Ejector column; 3. Tensioning mechanism; 301. Connecting seat; 302. Electric push rod; 4. Support frame; 401. Guide receiving groove; 402. Inverted L-shaped groove; 403. Through groove; 404. Arc positioning rod; 405. Plug-in groove; 406. Ejector block; 407. Elastic member; 5. Sealing ring clamping member; 501. Connecting rod; 502. Clamping frame; 503 , anti-slip rod; 504, wedge-shaped block; 6, push-pushing assembly; 601, pressure plate; 602, ejector rod; 603, return spring; 604, through hole; 605, wedge-shaped pressure block; 606, block rod; 7, ejector rack; 701, crank lever; 702, cross bar; 8, lid conveying and handling mechanism; 801, conveyor belt; 802, rotating disc; 803, positioning fixture; 804, arm; 805, pressing robot arm; 9, sealing ring conveying mechanism; 10, air valve vibration unloading tray; 11, air valve pressing mechanism. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0040] See also Figure 1-12 The embodiment of the present invention provides an automatic ring-fitting device for a fresh-keeping lunch box, comprising a machine platform 1 and a press-fitting platform 2, which is installed on the surface of the machine platform 1, and a tensioning mechanism 3 is elastically installed in the press-fitting platform 2, and a support frame 4 is symmetrically installed at both ends of the tensioning mechanism 3, and a sealing ring clamping member 5 is symmetrically slidably installed on the outer side of the support frame 4, and an opening 201 for a pair of support frames 4 to move is opened on the top of the press-fitting platform 2, and a push-top pressing component 6 is elastically slidably connected to the outer side of the support frame 4, and the push-top pressing component 6 is clamped with the sealing ring. The parts 5 are in abutment with each other, and a lifting frame 7 is hinged in the support frame 4 and abuts against the bottom of the push-pushing assembly 6. A guiding inclined groove 202 cooperating with the lifting frame 7 is provided on the pressing table 2. When the box cover is pressed to the pressing table 2, the box cover squeezes the push-pushing assembly 6 to force the sealing ring clamping part 5 to move away, and makes the top of the push-pushing assembly 6 flush with the support frame 4. When the tensioning mechanism 3 is assembled and the pair of support frames 4 are brought close to each other, the lifting frame 7 is driven to lift the push-pushing assembly 6 through the guiding inclined groove 202 to assist in material removal.

[0041] Specifically, the machine 1 has an assembly station for a sealing ring and a box cover, and a pressing table 2 is fixed on the assembly station. The pressing table 2 can receive the delivered sealing ring. When the sealing ring is placed in front of the pressing table 2, the support frames 4 on both sides are brought close to each other through the tensioning mechanism 3, so that the two support frames 4 can enter the middle area of ​​the sealing ring. Then, the support frames 4 on both sides are moved away from each other through the tensioning mechanism 3, so that the two support frames 4 respectively open the sealing ring from the inside of the sealing ring, so that the shape of the sealing ring is adapted to the groove shape of the lunch box cover. At this time, the entire sealing ring is in The outer edge of the opening 201 on the press-fitting platform 2, and the two support frames 4 are still within the range of the opening 201, and in the process of the support frames 4 being stretched, the sealing ring clamping piece 5 will clamp the sealing ring that is undergoing deformation and stretching, thereby preventing the sealing ring from falling off the press-fitting platform 2, and the push-pressing component will also be in an ejection state when the sealing ring is formed, so that when the box cover is pressed against the sealing ring, the push-pressing component can be pressed down by the box cover first, so that the push-pressing component can remove the sealing ring clamping piece 5 from the formed sealing ring before the box cover and the sealing ring are assembled, and The sealing ring clamp 5 sinks into the support frame 4, so that the heights of the two are kept at the same horizontal plane to prevent the sealing ring clamp 5 from affecting the tightness of the connection between the box cover and the sealing ring. The box cover continues to descend, and the sealing ring is pressed into a circle of grooves reserved for itself by the downward movement of the box cover. After the box cover and the sealing ring are assembled, the tensioning mechanism 3 is used to control a pair of support frames 4 to move closer to each other again, so that the support frame 4 releases the sealing ring. At the same time, the box cover is lifted up for unloading. However, since the support frame 4 can only move horizontally, the inner side wall of the sealing ring is still tightly attached to the support frame 4. If the material is unloaded directly, the sealing ring and the box cover will easily separate. In order to ensure the stability of the assembly of the two and avoid secondary assembly, the support frames 4 that are close to each other are allowed to move closer together again for a distance. When the support frames 4 move inward again, one end of the originally free-moving ejector frame 7 enters the guide chute 202 and is forced to rotate under the guidance of the guide chute 202, and then gradually lifts up the push-pull lifting assembly, and lifts up the box cover from the bottom by the push-pull lifting assembly, thereby facilitating the transportation of the assembled box cover from the pressing table 2 to the next station.

[0042] Compared with the prior art, the embodiment of the present invention provides a sealing ring clamping member 5 to clamp the sealing ring when the support frame 4 opens the sealing ring, so as to prevent the sealing ring from bouncing off the table surface of the press-fitting table 2 during the deformation process, thereby clamping the sealing ring, and in the process of pressing the box cover down, the pushing and pressing assembly 6 will be pressed first, so that the pushing and pressing assembly 6 forces the sealing ring clamping member 5 to move away from the sealing ring, and then the sealing ring clamping member 5 is allowed to enter the support frame 4, so as to prevent the sealing ring clamping member 5 from affecting the press-fitting operation between the sealing ring and the box cover, so that the box cover and the sealing ring are not affected by the pressing and pressing operation between the box cover and the sealing ring. They are tightly pressed together. After the assembly is completed, the tensioning mechanism 3 drives the support frames 4 on both sides to move closer to each other to loosen the box cover. In order to avoid excessive friction between the assembled box cover and the support frames 4, which makes it impossible to quickly and directly remove them, the support frames 4 on both sides can move closer to each other. After one end of the ejecting frame 7 enters the guiding inclined groove 202, the angle of the ejecting frame 7 is changed through the guiding inclined groove 202, and the ejecting frame 7 is used to lift the pushing and pressing assembly 6, so that the pushing and pressing assembly 6 can lift the lunch box from the bottom, thereby assisting in removing the material and improving the assembly efficiency.

[0043] In a further embodiment of the present invention, a box cover conveying and handling mechanism 8 and a sealing ring conveying mechanism 9 are installed on the machine 1, and the pressing table 2 is located between the box cover conveying and handling mechanism 8 and the sealing ring conveying mechanism 9. Specifically, the sealing ring conveying mechanism 9 conveys each sealing ring to the pressing table 2 in sequence, and the box cover conveying and handling mechanism 8 conveys each box cover to the pressing table 2 in sequence. The two conveying mechanisms successively convey the sealing rings and the box covers to the pressing table 2 at the pressing station to facilitate the rapid completion of the assembly operation.

[0044] In a further embodiment of the present invention, the box cover conveying and handling mechanism 8 includes a conveyor belt 801 and a rotating disk 802, and a plurality of positioning fixtures 803 are distributed in a ring on the top of the rotating disk 802. An arm 804 is installed between the rotating disk 802 and the pressing table 2, and a pressing robot arm 805 is slidably installed on the arm 804. A box cover suction cup is installed at the bottom of the pressing robot arm 805. Specifically, after the box cover is placed on the conveyor belt 801, the box cover is transferred to each positioning fixture 803 of the rotating disk 802 by the conveyor belt 801. The positioning fixtures 803 in various directions on the rotating disk 802 enable the box cover to have multiple processing and assembly stations, and the structure of the entire machine 1 is made more compact. The pressing robot arm 805 will move the box cover in the positioning fixture 803 to the top of the pressing table 2 through the box cover suction cup, and then the box cover is vertically pressed against the sealing ring on the pressing table 2 by the pressing robot arm 805, so that the box cover and the sealing ring are automatically pressed together.

[0045] In a further embodiment of the present invention, a valve vibration unloading tray 10 and a valve pressing mechanism 11 are installed on the machine 1. The valve pressing mechanism 11 is located between the valve vibration unloading tray 10 and the rotary turntable 802. Specifically, the valve pressing mechanism 11 directly presses the valves discharged from the valve vibration unloading tray 10 onto the box cover in the positioning fixture 803 of the rotary turntable 802, and then transfers the box cover with the valve installed to the clamping position of the pressing robot arm 805 through the rotary turntable 802, so that the entire assembly process of the box cover is smooth and the overall assembly efficiency is further improved.

[0046] In a further embodiment of the present invention, a mounting seat 203 is movably installed in the press-fitting table 2, and a plurality of telescopic rods 204 are fixedly connected between the mounting seat 203 and the bottom of the inner wall of the press-fitting table 2, and a buffer spring 205 is sleeved on the telescopic rod 204. The tensioning mechanism 3 includes a connecting seat 301 fixed to the top of the mounting seat 203, and electric push rods 302 are respectively installed between the connecting seat 301 and the two support frames 4. The bottom of the support frame 4 is in contact with the top surface of the mounting seat 203, and the top of the support rod is above the opening 201. Specifically, the tensioning mechanism 3 allows the support frame 4 to open the sealing ring by connecting the electric push rods 302 of the two support frames 4. Under the action of the buffer spring 205, if the support frame 4 is not subjected to downward pressure, the top of the support frame 4 will be in the upper position of the opening 201, so that the outer edge of the support frame 4 can contact the support frame 4 placed on the press-fitting table 2 When the box cover moves downward on the pressing table 2, the pushing and pressing assembly 6 will be pressed down first, so that the pushing and pressing assembly 6 forces the sealing ring clamp 5 to move away from the sealing ring, and then the sealing ring clamp 5 will enter the support frame 4 to prevent the sealing ring clamp 5 from affecting the pressing operation between the sealing ring and the box cover. When the pushing and pressing assembly 6 drops to the corresponding position, its top is flush with the top of the support frame 4. As the box cover continues to be pressed down, when the sealing ring is embedded in the groove on the box cover, the top of the support frame 4 will also move from above the opening 201 to the inside of the opening 201, reducing the contact area between the support frame 4 and the sealing ring, leaving space for the box cover to be installed with the sealing ring. When the box cover and the sealing ring are assembled and removed, the support frame 4 is lifted again under the action of the buffer spring 205 to continuously open the sealing ring on the pressing table 2.

[0047] In a further embodiment of the present invention, the sealing ring clamping member 5 includes a connecting rod 501, one end of the connecting rod 501 is fixedly connected to a clamping frame 502, a guide accommodating groove 401 for the clamping frame 502 to move is provided on the top outer edge of the support frame 4, the other end of the connecting rod 501 is fixedly connected to an anti-slip rod 503, an inverted L-shaped groove 402 adapted to the anti-slip rod 503 is provided on the support frame 4, and a through groove adapted to the connecting rod 501 is provided on the outer side of the inverted L-shaped groove 402 403, the width of the inverted L-shaped groove is greater than the width of the through groove 403, and the bottom of the inverted L-shaped groove is elastically connected with a push block 406, and an elastic member 407 is installed on one side of the anti-drop rod 503, and the elastic member 407 is vertically slidably connected with the inner wall of the L-shaped groove, and the elastic member 407 is located above the push block 406. Specifically, when the clamping frame 502 on the connecting rod 501 moves out of the guide receiving groove 401, it will be clamped from above the sealing ring when the support frame 4 opens the sealing ring. The sealing ring is used to prevent the sealing ring from slipping off during the process of the support frame 4 being stretched out. At the same time, the anti-slip rod 503 and the inverted L-shaped groove 402 cooperate with each other, so that when the push-pressing assembly 6 presses down the connecting rod 501, the anti-slip rod 503 moves from the horizontal section of the inverted L-shaped groove 402 to the vertical section below, so that the clamping frame 502 at the other end of the connecting rod 501 moves away from the sealing ring and enters the guide accommodating groove 401 to hide, so as to prevent the clamping frame 502 from extending out of the support frame 4 and causing the box to be The assembly between the cover and the sealing ring is not tight. When the push-pushing assembly 6 releases the connecting rod 501, the pushing block 406 in the vertical section of the inverted L-shaped groove 402 first pushes the anti-slip rod 503 to the corner of the inverted L-shaped groove 402 under the action of elastic force, and then pushes the anti-slip rod 503 outward through the elastic member 407 on the anti-slip rod 503, so that the clamping frame 502 is exposed from the guide receiving groove 401 on the support frame 4 again, so as to realize the continuous automatic positioning of each sealing ring.

[0048] In a further embodiment of the present invention, the push-pushing assembly 6 includes a pressure plate 601, one side of the pressure plate 601 is slidably connected to the support frame 4, the top of the pressure plate 601 is horizontally fixedly connected to a push rod 602, the push rod 602 is located above the support frame 4, a pair of return springs 603 are installed between the bottom of the pressure plate 601 and the support frame 4, a through hole 604 is opened through the pressure plate 601, the top of the inner wall of the through hole 604 is fixedly connected to a wedge-shaped pressure block 605, and the top of the connecting rod 501 is fixed in the through hole 604. The wedge-shaped pressing block 504 is connected to the wedge-shaped pressing block 605. When the wedge-shaped pressing block 605 presses the wedge-shaped pressing block 504 downward, the anti-dropping rod 503 moves along the horizontal section of the inverted L-shaped groove 402 to the vertical section. Specifically, before the box cover contacts the sealing ring on the press-fitting table 2, it will first contact the push rod 602 at the bottom of the pressing plate 601. Because the return spring 603 can lift the pressing plate 601 on the support frame 4 alone, the push rod 602 rises to the top of the support frame 4. The push rod 602 is pressed by the lowered box cover. After being pressed, the pressure plate 601 is driven to move downward, and the wedge-shaped pressure block 605 in the through hole 604 presses down the wedge-shaped pressure block 504 on the connecting rod 501, so that the connecting rod 501 first moves horizontally along the horizontal section of the L-shaped groove, so that the clamping frame 502 at one end of the connecting rod 501 moves away from the sealing ring, and then the anti-slip rod 503 at the other end of the connecting rod 501 enters the corner position of the inverted L-shaped groove 402. At this time, as the pressure plate 601 continues to press downward, the anti-slip rod 503 moves from the corner of the inverted L-shaped groove 402 The box cover 502 is moved to the vertical section of the inverted L-shaped groove 402, so that the entire sealing ring clamping part 5 is in a continuously descending state and the clamping frame 502 is prevented from moving out. After the box cover presses the top rod 602 into the support frame 4, the clamping frame 502 will enter the guide accommodating groove 401 again, so that the box cover can be completely attached to the support frame 4. As the support frame 4 is pressed, the connection between the box cover and the sealing ring is tighter. After the box cover and the sealing ring are assembled, the return spring 603 pushes up the pressure plate 601 again to allow the clamping frame 502 to move out again.

[0049] In a further embodiment of the present invention, arc-shaped positioning rods 404 are symmetrically installed on the outer edge of the top of the support frame 4, and a plug-in groove 405 compatible with the top rod 602 is opened between the two arc-shaped positioning rods 404 on the top surface of the support frame 4. Specifically, the arc-shaped positioning rods 404 on the two support frames 4 cooperate with each other to form an area for positioning the box cover. When the support frames 4 on both sides fully open the sealing ring, each arc-shaped positioning rod 404 respectively presses against the box cover from the inner side of the groove to prevent the box cover from shifting when pressed against the sealing ring, thereby ensuring the accuracy of the pressing of the box cover and the sealing ring. The plug-in groove 405 on the support frame 4 is used to facilitate the hidden embedding of the top rod 602. When the top rod 602 is embedded in the plug-in groove 405, the top surface of the support frame 4 can remain flat.

[0050] In a further embodiment of the present invention, the ejector rack 7 includes a pair of curved levers 701 respectively hinged to the support frame 4, one end of the two curved levers 701 is against the bottom of the push-pushing assembly 6, and the other ends of the two curved levers 701 are horizontally fixedly connected to the same cross bar 702, the guide inclined groove 202 is inclined downward, and the groove width of the guide inclined groove 202 is greater than the diameter of the cross bar 702. When the cross bar 702 enters the guide inclined groove 202, the curved lever 701 rotates and lifts the push-pushing assembly 6. Specifically, when the box cover completely presses the support frame 4 into the opening 201, it means that the sealing ring has been completely stuck in the groove on the box cover. At this time, the tensioning mechanism 3 is used to bring the support frames 4 on both sides closer to each other to reduce the contact area of ​​the box cover and reduce the friction. Then the support frame 4 is further moved inward, and the cross bar 702 connected to the curved lever 701 is moved into the notch of the guide inclined groove 202 and enters the groove along the notch of the guide inclined groove 202. As the support frame 4 moves further, the cross bar 702 will also gradually move down along the guide inclined groove 202, allowing the other end of the curved lever 701 to lift the push-pushing assembly 6, so that the push-pushing assembly 6 lifts the assembled box cover, thereby facilitating the subsequent automatic unloading operation without worrying about the inconvenience of clamping the box cover.

[0051] See also Fig.13 In another embodiment of the present invention, top columns 206 are symmetrically and movably inserted on both sides of the inner wall of the opening 201, and both sides of the pressure plate 601 are fixedly connected with abutment rods 606 that abut and cooperate with each top column 206. When the top of the top column 602 is at the same horizontal plane as the table surface of the press-fitting table 2, the height of the abutment rod 606 is lower than the height of the top column 206. Specifically, the top column 206 is located below the sealing ring placement area. When the pressure plate 601 is not pressed down, the abutment rod 606 is blocked by the top column 206, that is, the top of the top column 206 is hidden in the opening 201, and the bottom height of the top column 206 is lower than the height of the abutment rod 606. When the box cover presses down the push rod 602 on the pressure plate 601, it will force the pressure plate 601 to descend with the push rod 606, so that the height of the push rod 606 is first lower than the height of the top column 206, and then after the box cover is assembled and the support frames 4 on both sides are brought close to each other, the push rod 606 will be below the top column 206. In this way, as the curved lever 701 is guided by the guide inclined groove 202 to rotate and tilt the pressure plate 601, the push rod 606 on the pressure plate 601 will also lift the top column 206, allowing the top column 206 to push upward from the sealing ring installation position, thereby reducing the risk of separation between the box cover and the sealing ring during unloading.

[0052] A method for automatically putting a ring on a fresh-keeping lunch box, using the above-mentioned automatic putting a ring on a fresh-keeping lunch box device, comprises the following steps:

[0053] S1. First, place the sealing ring on the press-fitting table 2, and then drive the support frames on both sides to open the sealing ring outwards through the tensioning mechanism 3. The sealing ring clamping member 5 clamps the edge of the sealing ring during the process of opening the sealing ring, so that the sealing ring forms a shape that matches the box cover;

[0054] S2, move the box cover to the top of the formed sealing ring, and then press it down vertically. When the box cover squeezes and pushes the top pressing component 6, the sealing ring clamping part 5 will be forced to move away, and then the box cover completely presses the sealing ring, so that the sealing ring is embedded in the groove at the bottom of the cover;

[0055] S3. When the assembly is completed, the tensioning mechanism 3 is used to control the two side supports 4 to move closer to each other. At this time, one end of the ejector frame 7 enters the guiding inclined groove 202. In the process of making the two side supports 4 move closer to each other, the pushing and pressing components 6 on each support frame 4 will also be lifted up by the ejector frame 7, thereby assisting demoulding.

[0056] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic ring-fitting device for a fresh-keeping lunch box, comprising a machine (1), characterized in that: Also includes: A press-fitting table (2) is mounted on the table top of the machine table (1), and a tensioning mechanism (3) is elastically mounted in the press-fitting table (2), support frames (4) are symmetrically mounted at both ends of the tensioning mechanism (3), and a sealing ring clamping member (5) is symmetrically slidably mounted on the outer side of the support frame (4), and an opening (201) is provided on the top of the press-fitting table (2) for a pair of support frames (4) to move; A mounting seat (203) is movably installed in the press-fitting platform (2), a plurality of telescopic rods (204) are fixedly connected between the mounting seat (203) and the bottom of the inner wall of the press-fitting platform (2), a buffer spring (205) is sleeved on the telescopic rod (204), the tensioning mechanism (3) comprises a connecting seat (301) fixed to the top of the mounting seat (203), and electric push rods (302) are respectively installed between the connecting seat (301) and the two support frames (4); The sealing ring clamping member (5) comprises a connecting rod (501), one end of which is fixedly connected to a clamping frame (502), a guide receiving groove (401) for the clamping frame (502) to move is provided on the outer edge of the top of the support frame (4), the other end of the connecting rod (501) is fixedly connected to an anti-slip rod (503), an inverted L-shaped groove (402) adapted to the anti-slip rod (503) is provided on the support frame (4), and a through groove (403) adapted to the connecting rod (501) is provided on the outer side of the inverted L-shaped groove (402); A push-pushing assembly (6) is elastically slidably connected to the outer side of the support frame (4), and the push-pushing assembly (6) is in abutment with the sealing ring clamp (5). A material ejection frame (7) is hingedly connected in the support frame (4) and is in abutment with the bottom of the push-pushing assembly (6). A guide inclined groove (202) is provided on the press-fitting platform (2) and is matched with the material ejection frame (7); When the box cover is pressed onto the press-fitting table (2), the box cover squeezes the push-pushing assembly (6) to force the sealing ring clamp (5) to move away, and allows the top of the push-pushing assembly (6) to be flush with the support frame (4). When the tensioning mechanism (3) is assembled and the pair of support frames (4) are brought closer together, the material ejecting frame (7) is driven by the guide inclined groove (202) to lift the push-pushing assembly (6) to assist in removing the material.

2. The automatic ring-fitting device for a fresh-keeping lunch box according to claim 1, characterized in that: The machine platform (1) is provided with a box cover conveying and handling mechanism (8) and a sealing ring conveying mechanism (9), and the pressing platform (2) is located between the box cover conveying and handling mechanism (8) and the sealing ring conveying mechanism (9).

3. The automatic ring-fitting device for a fresh-keeping lunch box according to claim 2, characterized in that: The box cover conveying and transporting mechanism (8) comprises a conveyor belt (801) and a rotating disk (802), a plurality of positioning jigs (803) are distributed in a ring shape on the top of the rotating disk (802), an arm frame (804) is installed between the rotating disk (802) and the pressing platform (2), and a pressing mechanical arm (805) is slidably installed on the arm frame (804).

4. The automatic ring-fitting device for a fresh-keeping lunch box according to claim 3 is characterized in that: The machine platform (1) is provided with an air valve vibration unloading tray (10) and an air valve pressing mechanism (11), and the air valve pressing mechanism (11) is located between the air valve vibration unloading tray (10) and the rotating disk (802).

5. The automatic ring-fitting device for a fresh-keeping lunch box according to claim 1, characterized in that: The push-pushing assembly (6) comprises a pressure plate (601), one side of which is slidably connected to the support frame (4), a top of the pressure plate (601) is horizontally fixedly connected with a push rod (602), and the push rod (602) is located above the support frame (4), a pair of return springs (603) are installed between the bottom of the pressure plate (601) and the support frame (4), a through hole (604) is opened through the pressure plate (601), and a wedge-shaped pressure block (605) is fixedly connected to the top of the inner wall of the through hole (604), and a wedge-shaped pressure block (504) that abuts against the wedge-shaped pressure block (605) is fixedly connected to the top of the connecting rod (501) in the through hole (604), and when the wedge-shaped pressure block (605) presses down the wedge-shaped pressure block (504), the anti-slip rod (503) moves along the horizontal section of the inverted L-shaped groove (402) to the vertical section.

6. The automatic ring-fitting device for a fresh-keeping lunch box according to claim 5, characterized in that: The outer edge of the top of the support frame (4) is symmetrically provided with arc-shaped positioning rods (404), and the top surface of the support frame (4) is provided with a plug-in groove (405) adapted to the top rod (602) between the two arc-shaped positioning rods (404).

7. The automatic ring-fitting device for a fresh-keeping lunch box according to claim 1, characterized in that: The ejecting frame (7) comprises a pair of curved levers (701) respectively hinged to the support frame (4), one end of the two curved levers (701) abuts against the bottom of the push-pushing assembly (6), and the other ends of the two curved levers (701) are horizontally fixedly connected to the same cross bar (702). When the cross bar (702) enters the guide inclined groove (202), the curved levers (701) rotate and lift the push-pushing assembly (6).

8. A method for automatically putting a ring on a fresh-keeping lunch box, using an automatic putting a ring on a fresh-keeping lunch box device as claimed in any one of claims 1 to 7, characterized in that: The steps include: S1. First, place the sealing ring on the press-fitting table (2), and then drive the support frames on both sides to open the sealing ring outwards through the tensioning mechanism (3). The sealing ring clamping member (5) clamps the edge of the sealing ring during the process of opening the sealing ring, so that the sealing ring forms a shape that matches the box cover; S2, move the box cover to the top of the formed sealing ring, and then press it down vertically. When the box cover first squeezes and pushes the top pressing component (6), it will force the sealing ring clamping part (5) to move away, and then the box cover completely presses the sealing ring, so that the sealing ring is embedded in the groove at the bottom of the cover; S3. When the assembly is completed, the tensioning mechanism (3) controls the two side supports (4) to move closer to each other. At this time, one end of the ejector frame (7) enters the guide inclined groove (202). In the process of the two side supports (4) moving closer to each other, the push-pushing assembly (6) on each support frame (4) will also be lifted up by the ejector frame (7), thereby assisting demoulding.

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