A swing arm self-locking safety mechanism for a wrapping machine

Abstract

The present application discloses a swing arm self-locking safety mechanism for a wrapping machine, which includes a machine body, a swing arm and a mounting bracket, and further includes a locking groove provided on the swing arm; a locking unit mounted on the machine body and including a first spring and a locking member. When the swing arm is lifted, the locking member is engaged with the locking groove to fix the swing arm. The locking groove includes a groove body whose top width is greater than the bottom width; an inclined surface provided at the end of the groove body, and the inclined surface is used to cooperate with the locking member to fix the swing arm when the swing arm is lifted. When the swing arm is lifted, the first spring pushes the locking member to rise, so that the locking member cooperates with the inclined surface to fix the swing arm. When it is necessary to lower the swing arm, press the locking member to make it descend and disengage from the contact with the inclined surface, and the swing arm falls.

Description

Technical Field

[0001] The present invention relates to a swing arm self-locking safety mechanism for a wrapping machine. Background Art

[0002] A wrapping machine is a device designed and manufactured to meet the packaging requirements for the containerized storage, transportation, and mechanized loading and unloading of goods, and is widely used in the containerization costs of products such as foreign trade exports, food and beverages, canning, paperboard, dyes, plastics and chemicals, glass and ceramics, and electro-mechanical castings. Currently, the wrapping machine used for the packaging of food packaging boxes and paperboards includes a machine body 101, a lower conveyor belt 102, an upper conveyor belt 103, a paperboard placing device 104, a grasping device 105, a paperboard bending device 106, and a gluing device 107. The packaging box moves on the lower conveyor belt 102, and the grasping device 105 transfers the paperboard in the paperboard placing device 104 onto the packaging box. Subsequently, the upper conveyor belt 103 presses the paperboard and cooperates with the lower conveyor belt 102 to continue transporting the packaging box. After the paperboard on the packaging box is bent, glued, and compacted, the wrapping work is completed. The mounting frame 202 of the upper conveyor belt 103 is installed on the machine body 101 through a swing arm 201. The swing arm 201 is hinged to the machine body 101, and a handle 203 is provided on the mounting frame 202 so that the upper conveyor belt 103 can be lifted to facilitate finding the physical center of the paperboard when replacing paperboards of different sizes, as shown in Figure 1 and Figure 2 However, the defect of the foregoing structure is that when pulling the mounting frame 202 through the handle 203, the swing arm 201 moves, causing the upper conveyor belt 103 to be lifted. However, before finding the physical center of the paperboard, it is necessary to keep pulling the mounting frame 202 to prevent the upper conveyor belt 103 from falling, which is inconvenient for a single person to independently replace different paperboards and align the physical center of the paperboard. Therefore, it is necessary to make improvements. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems existing in the prior art.

[0004] The present application provides a swing arm self-locking safety mechanism for a wrapping machine, including a machine body, a swing arm, and a mounting frame, comprising:

[0005] A locking groove, which is provided on the swing arm;

[0006] A locking unit, which is installed on the machine body and includes a first spring and a locking member;

[0007] Wherein, when the swing arm is lifted, the locking member engages with the locking groove to fix the swing arm.

[0008] The locking groove includes:

[0009] A groove body, the width of the top end of which is greater than the width of the bottom end;

[0010] An inclined surface, which is provided at the end of the groove body;

[0011] Wherein, the inclined surface is used to cooperate with the locking member to fix the swing arm when the swing arm is lifted.

[0012] The locking unit further includes:

[0013] A sliding groove, which is arranged on the machine body and has a through top end;

[0014] Wherein, a first spring is arranged at the bottom end of the sliding groove, the locking member is arranged in the sliding groove in a liftable manner, and the bottom end abuts against the first spring.

[0015] The locking member includes:

[0016] A rod body, the top end of which is movably inserted through the bottom end and the top end of the groove body, and the bottom end is movably installed in the groove body;

[0017] A locking block, which is installed in the middle of the rod body and includes a limiting surface a and an engaging surface b.

[0018] The locking member further includes:

[0019] A blind hole, which is arranged at the bottom end of the rod body;

[0020] Wherein, the top end of the first spring is inserted into the blind hole.

[0021] It further includes:

[0022] A buffer device, which is installed on the machine body through a support and is located below the swing arm;

[0023] Wherein, the buffer device includes a buffer cavity, buffer gas and a second spring.

[0024] The buffer device further includes:

[0025] A fixed sleeve, which is detachably installed on the support and has an open top end;

[0026] A telescopic sleeve, which is telescopically sleeved on the top of the fixed sleeve in a liftable manner and has a closed top end;

[0027] A lifting piston, which is installed in the inner cavity of the telescopic sleeve in a liftable manner, and the outer peripheral wall is in sealed contact and cooperation with the inner wall of the telescopic sleeve through a sealing ring;

[0028] Wherein, the buffer cavity is located between the top surface of the lifting piston and the inner wall of the top end of the fixed sleeve and is filled with buffer gas, and the second spring is arranged in the inner cavity of the fixed sleeve and its top end abuts against the bottom end of the lifting piston.

[0029] The buffer device further includes:

[0030] An installation groove, which is arranged on the top surface of the support and is adapted to the bottom end of the fixed sleeve;

[0031] A slot, which is arranged in the support, one end penetrates through the support, and the other end communicates with the installation groove;

[0032] A ring groove, which is arranged on the outer peripheral wall at the bottom end of the fixed sleeve;

[0033] A plug board, which can be movably inserted into the slot;

[0034] A limiting groove, which is arranged at the inner end of the plug board and is used for plugging and cooperating with the ring groove.

[0035] The buffer device further includes:

[0036] A plurality of screw holes, which are arranged at intervals along the circumferential direction on the top of the outer peripheral wall of the fixed sleeve;

[0037] A plurality of through grooves, which are arranged vertically at intervals along the circumferential direction on the bottom of the outer peripheral wall of the telescopic sleeve and correspond to the respective screw holes;

[0038] A plurality of fasteners, the ends of which respectively pass through the respective through grooves and are threadedly connected to the corresponding screw holes;

[0039] A plurality of clamping blocks, which are arranged at the bottom of the outer peripheral wall of the telescopic sleeve and are distributed on both sides of the bottom ends of the respective through grooves.

[0040] The buffer device further includes:

[0041] An inflation valve, which is arranged at the top of the telescopic sleeve and is communicated with the buffer cavity.

[0042] The beneficial effects of the present invention are as follows:

[0043] 1. Through the arrangement of the groove body, the inclined surface, the sliding groove, the first spring, the rod body and the locking block, when the swing arm is lifted, the rod body rises, and the locking block cooperates with the inclined surface to fix the swing arm;

[0044] When the rod body is pressed against the first spring, the rod body descends, the first spring is compressed, the locking block is separated from the inclined surface in contact, and the swing arm falls;

[0045] 2. Through the arrangement of the fixed sleeve, the telescopic sleeve, the lifting piston, the buffer cavity, the buffer gas and the second spring, multiple buffers are carried out on the impact when the swing arm falls, preventing the upper conveyor belt and the lower conveyor belt on the mounting frame at the other end of the swing arm from colliding and being damaged. Description of the Drawings

[0046] Figure 1 It is a schematic diagram of the overall structure of a wrapping machine in the prior art;

[0047] Figure 2 It is a schematic diagram of the cooperation of the swing arm, the machine body and the mounting frame in the prior art;

[0048] Figure 3 It is a schematic diagram of the combined structure of the swing arm, the machine body, the mounting frame, the locking groove and the locking member in the embodiment of the present application (the swing arm is in the falling state);

[0049] Figure 4Schematic diagram of the combined structure of the swing arm, the body, the mounting bracket, the locking groove and the locking member in the embodiment of the present application (swing arm in the lowered state);

[0050] Figure 5 is Figure 4 Partial enlarged structural diagram at position A in.

[0051] Reference numerals

[0052] 101 - Body, 102 - Lower conveyor belt, 103 - Upper conveyor belt, 104 - Paper placing device, 105 - Gripping device, 106 - Paper board bending device, 107 - Glue applying device, 201 - Swing arm, 202 - Mounting bracket, 203 - Handle, 3 - Locking groove, 301 - Groove body, 302 - Inclined surface, 4 - Locking unit, 401 - Spring I, 402 - Chute, 5 - Locking member, 501 - Rod body, 502 - Locking block, 502a - Limiting surface, 502b - Engaging surface, 503 - Blind hole, 6 - Buffer device, 601 - Buffer cavity, 602 - Buffer gas, 603 - Spring II, 604 - Fixed sleeve, 605 - Telescopic sleeve, 606 - Lifting piston, 607 - Mounting groove, 608 - Slot, 609 - Ring groove, 610 - Insert plate, 611 - Limiting groove, 612 - Screw hole, 613 - Through groove, 614 - Fastener, 615 - Block, 616 - Inflation valve, 617 - Sealing ring. Detailed implementation manners

[0053] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0054] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. generally belong to the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0055] Next, the servo provided in the embodiments of the present application will be described in detail in conjunction with the accompanying drawings through specific embodiments and their application scenarios.

[0056] Embodiment 1:

[0057] As Figure 3 and Figure 4 shown, the embodiment of the present application provides a swing arm self-locking safety mechanism for a wrapping machine, which includes a machine body 101, a swing arm 201, and a mounting bracket 202, and further includes a locking groove 3 provided on the swing arm 201; a locking unit 4 mounted on the machine body 101 and including a first spring 401 and a locking member 5. When the swing arm 201 is lifted, the locking member 5 is engaged with the locking groove 3 to fix the swing arm 201.

[0058] Furthermore, the locking groove 3 includes a groove body 301 whose top width is greater than the bottom width; and an inclined surface 302 provided at one end of the groove body 301. Among them, the inclined surface 302 is used to cooperate with the locking member 5 to fix the swing arm 201 when the swing arm 201 is lifted.

[0059] Furthermore, the locking unit 4 further includes a sliding groove 402 provided on the machine body 101, which is open at the top. The first spring 401 is provided at the bottom end of the sliding groove 402. The locking member 5 is arranged to be liftable in the sliding groove 402, and its bottom end abuts against the first spring 401.

[0060] Furthermore, the locking member 5 includes a rod body 501 whose top end movably penetrates through the bottom end and the top end of the groove body 301, and the bottom end is movably installed in the groove body 301; a locking block 502 mounted in the middle of the rod body 501, which includes a limiting surface 502a and an engaging surface 502b.

[0061] Furthermore, the locking member 5 further includes a blind hole 503 provided at the bottom end of the rod body 501, and the top end of the first spring 401 is inserted into the blind hole 503.

[0062] In this embodiment of the present application, due to the adoption of the above structure, when the swing arm 201 is lifted, the inclined surface 302 of the groove body 301 aligns with the engaging surface 502b of the locking block 502 on the rod body 501 as the swing arm 201 is lifted. The first spring 401 pushes the rod body 501 upward, causing the locking block 502 to approach the groove body 301 until the engaging surface 502b fits against the inclined surface 302. At this time, the swing arm 201 is fixed, the locking block 502 is inserted into the groove body 301, and the swing arm 201 cannot descend. When it is necessary to lower the swing arm 201, the rod body 501 is pressed toward the first spring 401, causing the bottom end of the rod body 501 to penetrate into the arc groove. The first spring 401 is compressed and stores elastic potential energy. The engaging block descends with the rod body 501 until the locking block 502 disengages from the groove body 301. At this time, the engaging surface 502b is separated from the inclined surface 302. Under the pressure of gravity and the weights of the mounting bracket 202 and the upper conveyor belt 103 provided at the other end of the swing arm 201, the swing arm 201 falls. Subsequently, when the external force is removed, the first spring 401 releases part of its elastic potential energy, causing the rod body 501 to rise. The upper end of the rod body 501 slides in the groove body 301 until the limiting surface 502a of the engaging block abuts against the outer wall of the swing arm 201. When the swing arm 201 is lifted next time, the locking block 502 can be inserted into the groove body 301 again to make the engaging surface 502b fit against the inclined surface 302 to fix the swing arm 201.

[0063] Embodiment 2:

[0064] As Figure 5 shown, in this embodiment, in addition to including the structural features of the foregoing embodiment, further, a buffer device 6 is included. It is installed on the machine body 101 through a support 7 and is located below the swing arm 201. Among them, the buffer device 6 includes a buffer chamber 601, buffer gas 602, and a second spring 603.

[0065] Further, the buffer device 6 further includes a fixed sleeve 604, which is detachably installed on the support 7 and has an open top; a telescopic sleeve 605, which is telescopically sleeved on the top of the fixed sleeve 604 and has a closed top; a lifting piston 606, which is liftably installed in the inner cavity of the telescopic sleeve 605, and the outer peripheral wall is in sealed contact and cooperation with the inner wall of the telescopic sleeve 605 through a sealing ring 617. The buffer chamber 601 is located between the top surface of the lifting piston 606 and the inner wall of the top end of the fixed sleeve 604 and is filled with buffer gas 602. The second spring 603 is arranged in the inner cavity of the fixed sleeve 604 and its top end abuts against the bottom end of the lifting piston 606.

[0066] Further, the buffer device 6 further includes a mounting groove 607, which is arranged on the top surface of the support 7 and is adapted to the bottom end of the fixed sleeve 604; a slot 608, which is arranged in the support 7, one end penetrates through the support 7, and the other end communicates with the mounting groove 607; a ring groove 609, which is arranged on the outer peripheral wall of the bottom end of the fixed sleeve 604; a plug board 610, which can be movably inserted into the slot 608; a limiting groove 611, which is arranged at the inner end of the plug board 610 and is used for plugging and cooperating with the ring groove 609.

[0067] Further, the buffer device 6 further includes a plurality of screw holes 612, which are arranged at intervals along the circumferential direction on the top of the outer peripheral wall of the fixed sleeve 604; a plurality of through grooves 613, which are arranged vertically at intervals along the circumferential direction on the bottom of the outer peripheral wall of the telescopic sleeve 605 and correspond to the respective screw holes 612; a plurality of fasteners 614, the ends of which respectively pass through the respective through grooves 613 and are threadedly connected to the corresponding screw holes 612; a plurality of clamping blocks 615, which are arranged on the bottom of the outer peripheral wall of the telescopic sleeve 605 and are distributed on both sides of the bottom ends of the respective through grooves 613.

[0068] Further, the buffer device 6 further includes an inflation valve 616, which is arranged on the top of the telescopic sleeve 605 and communicates with the buffer chamber 601.

[0069] In this embodiment of the present application, due to the adoption of the above structure, when the swing arm 201 falls, its bottom surface contacts the top end of the telescopic sleeve 605. As the swing arm 201 falls, the telescopic sleeve 605 slides towards the bottom of the fixed sleeve 604. During this period, the buffer gas 602 in the buffer chamber 601 located between the lifting piston 606 and the inner wall of the top of the fixed sleeve 604 is compressed to absorb the impact. When the air pressure in the buffer chamber 601 is greater than the elastic force of the second spring 603, the lifting piston 606 descends in the fixed sleeve 604, so that the remaining impact force is transmitted to the second spring 603. The second spring 603 deforms to absorb the impact force and converts the impact force into elastic potential energy for storage. In this way, the rapid fall of the swing arm 201 can be avoided, buffer is provided for the fall of the swing arm 201, and the impact force generated when the swing arm 201 falls is converted into elastic potential energy for storage. When it is necessary to lift the swing arm 201, the second spring 603 releases the elastic potential energy, and the buffer gas 602 releases the pressure to assist in lifting the swing arm 201;

[0070] In the embodiment of the present application, when the telescopic sleeve 605 ascends and descends outside the fixed sleeve 604, the respective through grooves 613 slide relative to the respective fasteners 614. When the swing arm 201 is lifted to the position where the locking block 502 cooperates with the groove body 301 and is fixed, and its outer wall is separated from the top end of the telescopic sleeve 605, the outer end of the fastener 614 contacts the top ends of a pair of clamping blocks 615, so that the telescopic sleeve 605 cannot continue to lift, preventing the buffer gas 602 from leaking;

[0071] The fastener 614 uses a bolt. The threaded end of the bolt movably passes through the through groove 613 and is threadedly connected to the threaded hole 612. The cross-sectional area of the nut end of the bolt is larger than the distance between the through groove 613 and the corresponding pair of clamping blocks 615. Therefore, when the telescopic sleeve 605 rises to a certain extent, the telescopic sleeve 605 cannot continue to rise because the nut end of the bolt abuts against the top ends of the pair of clamping blocks 615.

[0072] When assembling the buffer device 6, first place the second spring 603 into the inner cavity of the fixed sleeve 604. Then insert the piston 606 with a sealing ring 617 sleeved on the outer ring of its top end into the inner cavity of the fixed sleeve 604. Sleeve the telescopic sleeve 605 onto the upper end of the fixed sleeve 604. At this time, the sealing ring 617 on the outer ring of the piston 606 contacts the inner wall of the telescopic sleeve 605, forming a buffer cavity 601 between the top of the piston 606 and the inner wall of the top of the telescopic sleeve 605. Then press down the fixed sleeve 604 so that each clamping block 615 moves to below the corresponding threaded hole 612, and each through groove 613 is aligned with the corresponding threaded hole 612. Pass a plurality of fasteners 614 through the respective corresponding through grooves 613 and threadedly connect them to the respective threaded holes 612. Connect to an external inflation device (such as an air pump) through the inflation valve 616, fill the buffer cavity 601 with buffer gas 602, and then insert the bottom end of the fixed sleeve 604 into the installation groove 607. Wait until the annular groove 609 is aligned with the slot 608. At this time, insert the insertion plate 610 into the slot 608 so that the insertion plate 610 extends deep into the slot 608, and the annular groove 609 is also inserted into the limiting groove 611 at the same time. In this way, the assembly of the buffer device 6 and its installation on the frame 101 are facilitated.

[0073] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0074] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A swing arm self-locking safety mechanism for a wrapping machine, comprising a machine body (101), a swing arm (201) and a mounting bracket (202), characterized in that, Further included are: A locking groove (3), which is arranged on the swing arm (201); A locking unit (4), which includes a first spring (401) and a locking member (5); Wherein, when the swing arm (201) is lifted, the locking member (5) engages with the locking groove (3) to fix the swing arm (201); Further included are: A buffer device (6), which is installed on the machine body (101) through a support (7) and is located below the swing arm (201); Wherein, the buffer device (6) includes a buffer cavity (601), buffer gas (602) and a second spring (603); The buffer device (6) further includes: A fixed sleeve (604), which is detachably installed on the support (7) and has an open top end; A telescopic sleeve (605), which is sleeved on the top of the fixed sleeve (604) in a liftable manner and has a closed top end; A lifting piston (606), which is installed in the inner cavity of the telescopic sleeve (605) in a liftable manner, and the outer peripheral wall is in sealed contact and cooperation with the inner wall of the telescopic sleeve (605) through a sealing ring (617); Wherein, the buffer cavity (601) is located between the top surface of the lifting piston (606) and the inner wall of the top end of the fixed sleeve (604) and is filled with buffer gas (602), and the second spring (603) is arranged in the inner cavity of the fixed sleeve (604) and its top end abuts against the bottom end of the lifting piston (606); The buffer device (6) further includes: An installation groove (607), which is arranged on the top surface of the support (7) and is adapted to the bottom end of the fixed sleeve (604); A slot (608), which is arranged in the support (7), one end penetrates through the support (7), and the other end communicates with the installation groove (607); An annular groove (609), which is arranged on the outer peripheral wall of the bottom end of the fixed sleeve (604); A plug board (610), which can be movably inserted into the slot (608); A limiting groove (611), which is arranged at the inner end of the plug board (610) and is used for plugging and cooperating with the annular groove (609); The buffer device (6) further includes: A plurality of screw holes (612), which are arranged at intervals along the circumferential direction on the top of the outer peripheral wall of the fixed sleeve (604); A plurality of through grooves (613), which are arranged vertically at intervals along the circumferential direction on the bottom of the outer peripheral wall of the telescopic sleeve (605) and correspond to the respective screw holes (612); A plurality of fasteners (614), the ends of which respectively pass through the respective through grooves (613) and are threadedly connected to the corresponding screw holes (612); A plurality of clamping blocks (615), which are arranged at the bottom of the outer peripheral wall of the telescopic sleeve (605) and are distributed on both sides of the bottom ends of the respective through grooves (613).

2. The swing arm self-locking insurance mechanism of a wrapping machine according to claim 1, characterized in that, The locking groove (3) includes: A groove body (301), the width of the top end of which is greater than that of the bottom end; An inclined surface (302), which is arranged at the end of the groove body (301); Wherein, the inclined surface (302) is used for cooperating with the locking member (5) to fix the swing arm (201) when the swing arm (201) is lifted.

3. The swing arm self-locking safety mechanism of a wrapping machine according to claim 2, characterized in that, The locking unit (4) further includes: A sliding groove (402), which is arranged on the machine body (101) and has a through top end; Among them, the first spring (401) is arranged at the bottom end of the sliding groove (402), and the locking member (5) is arranged in the sliding groove (402) in a liftable manner, and its bottom end abuts against the first spring (401).

4. The swing arm self-locking safety mechanism of a wrapping machine according to claim 3, characterized in that, The locking member (5) includes: A rod body (501), the top end of which is movably inserted through the bottom end and the top end of the groove body (301), and the bottom end is movably installed in the groove body (301); A locking block (502), which is installed in the middle of the rod body (501) and includes a limiting surface (502a) and an engaging surface (502b).

5. The swing arm self-locking safety mechanism of a wrapping machine according to claim 4, characterized in that, The locking member (5) further includes: A blind hole (503), which is arranged at the bottom end of the rod body (501); Among them, the top end of the first spring (401) is inserted into the blind hole (503).

6. The swing arm self-locking safety mechanism of a wrapping machine according to claim 1, characterized in that, The buffer device (6) further includes: An inflation valve (616), which is arranged at the top of the telescopic sleeve (605) and communicates with the buffer cavity (601).

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