CN112027151B

CN112027151B - Centering packaging machine

Info

Publication number: CN112027151B
Application number: CN202010798257.1A
Authority: CN
Inventors: 不公告发明人
Original assignee: Anhui Qiaoge Food Technology Co ltd
Current assignee: Anhui Qiaoge Food Technology Co.,Ltd.
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-12-21
Anticipated expiration: 2040-08-11
Also published as: CN112027151A

Abstract

The application provides a centering packagine machine belongs to packing technical field. The centering packaging machine comprises a base, a rotating table, a first driving mechanism, a film feeding frame, a material pressing device, a second driving mechanism, a centering frame and an elastic piece. The base is provided with a first guide post and a second guide post at intervals. The first driving mechanism is used for driving the rotating table to rotate around a vertical axis relative to the base. The film feeding frame is used for placing the film roll. The pressing device is used for pressing the film fed out from the film roll onto the workpiece. The second driving mechanism is used for driving the film feeding frame and the material pressing device to synchronously ascend or descend. The centering frame is provided with a centering shaft which is coaxial with the rotating platform. The elastic piece is used for driving the centering frame to vertically move downwards so that the centering shaft is inserted into a central hole of a workpiece placed on the rotating table. The centering shaft on the centering frame can be inserted into the central hole of the workpiece placed on the rotating table under the action of the elastic piece, so that centering work is completed, and the situation that the workpiece is thrown out in the process of rotating along with the centering frame can be effectively avoided.

Description

Centering packaging machine

Technical Field

The application relates to the technical field of packaging, in particular to a centering packaging machine.

Background

The packaging machine generally rotates the rotary table to drive the workpiece to rotate, and the film delivered from the film roll is wound on the workpiece to complete the packaging of the workpiece. For the existing packaging machine, after the workpiece is placed on the rotating table, the workpiece can be placed off-center when the rotating table works, the workpiece is easily thrown out under the action of centrifugal force, and the packaging quality cannot be guaranteed.

Disclosure of Invention

The application provides a centering packagine machine to improve above-mentioned because of work piece is put the problem that the inclined to one side is thrown away by the revolving stage easily.

The invention is particularly such that:

the application provides a centering packaging machine which comprises a base, a rotating table, a first driving mechanism, a film feeding frame, a material pressing device, a second driving mechanism, a centering frame and an elastic piece, wherein the rotating table is arranged on the base;

the base is provided with a first guide post and a second guide post at intervals;

the rotating table is rotatably arranged on the base and is positioned between the first guide column and the second guide column, and the rotating table is used for placing a workpiece;

the first driving mechanism is connected between the rotating table and the base and used for driving the rotating table to rotate around a vertical axis relative to the base;

the film feeding frame is vertically and movably arranged on the first guide column and used for placing a film roll;

the pressing device is vertically and movably arranged on the second guide post and is used for pressing the film fed out by the film roll onto the workpiece;

the second driving mechanism is connected to the base, the film feeding frame and the material pressing device are both connected to the second driving mechanism, and the second driving mechanism is used for driving the film feeding frame and the material pressing device to synchronously ascend or synchronously descend;

the centering frame is vertically movably arranged on the second guide column, and a centering shaft coaxial with the rotating table is arranged on the centering frame;

the elastic piece acts between the second guide column and the centering frame and is used for driving the centering frame to vertically move downwards so that the centering shaft is inserted into a central hole of a workpiece placed on the rotating table;

when the second driving mechanism drives the film feeding frame and the pressing device to synchronously ascend to the top of the workpiece, the pressing device can push the centering frame to move upwards so that the centering shaft is separated from the central hole.

In one embodiment, the centering frame comprises a frame body, a sleeve and a driving piece;

the frame body and the sleeve are sleeved on the second guide column, the frame body is axially locked and circumferentially rotatably connected to the sleeve, and the sleeve is circumferentially locked and axially movably connected to the second guide column; the centering shaft is fixedly arranged on the frame body;

the driving piece is connected between the sleeve and the frame body and used for driving the frame body to rotate for a preset angle relative to the sleeve when the centering shaft is separated from the center hole, so that the frame body and the workpiece are staggered.

In one embodiment, the frame body is provided with a cutter;

the cutter is used for cutting off the film between the workpiece and the film roll in the process that the driving piece drives the frame body to rotate relative to the sleeve by the preset angle.

In an embodiment, the frame body is provided with a guide hole for the second guide post to pass through, and a convex part is arranged on the hole wall of the guide hole;

a limiting groove is formed in the outer side wall of the second guide column and comprises a vertical groove and an arc groove, the vertical groove is arranged in the axial direction of the second guide column, the arc groove is arranged in the circumferential direction of the second guide column, one end of the vertical groove is communicated with one end of the arc groove, and the protruding portion is clamped in the limiting groove;

when the centering shaft is inserted into the central hole, the protruding part is positioned in the vertical groove;

when the protruding part is positioned at the intersection of the vertical groove and the arc groove, the centering shaft is separated from the central hole.

In one embodiment, the frame body has a cylindrical portion, and the cylindrical portion is sleeved outside the second guide post;

a positioning hole with a larger hole diameter than the guide hole is arranged in the cylindrical part, one end of the guide hole penetrates through one axial end of the cylindrical part, the other end of the guide hole is communicated with one end of the positioning hole, and the other end of the positioning hole penetrates through the other axial end of the cylindrical part;

the sleeve is arranged in the positioning hole, an annular clamping groove is formed in the peripheral wall of the sleeve, and the hole wall of the positioning hole is provided with an annular clamping protrusion clamped in the annular clamping groove.

In one embodiment, the driving member is a torsion spring sleeved on the second guiding column;

the torsion spring is limited in the positioning hole by the sleeve;

a first shaft boss is arranged on one axial end face of the sleeve;

a second shaft protrusion is arranged on the hole end wall of the positioning hole;

one free end of the torsion spring is abutted against the first shaft protrusion, and the other free end of the torsion spring is abutted against the second shaft protrusion.

In one embodiment, the outer peripheral wall of the second guide column is provided with a vertically arranged guide groove;

the inner peripheral wall of the sleeve is provided with a bulge, and the bulge is clamped in the guide groove.

In one embodiment, the centering shaft includes a fixed shaft portion and a rotating shaft portion;

the fixed shaft part is fixed on the centering frame;

the rotating shaft part is rotatably arranged on the fixed shaft part and is coaxially arranged with the fixed shaft part;

the rotating shaft part is provided with a conical part inserted in the central hole.

In one embodiment, the pressing device includes a first movable seat, a second movable seat, a driving unit, a swing frame, a first pressing wheel and a second pressing wheel;

the first movable seat is vertically movably arranged on the second guide column;

the second movable seat is horizontally and movably arranged on the first movable seat;

the swing frame is rotatably arranged on the second movable seat around a vertical axis and is provided with a first free end and a second free end, and the first pressing wheel and the second pressing wheel are respectively rotatably arranged on the first free end and the second free end;

the driving unit is connected between the first movable seat and the second movable seat and used for driving the second movable seat to horizontally move relative to the first movable seat, so that the first pressing wheel and the second pressing wheel press the film which is rolled out by the film onto the workpiece.

In one embodiment, the pressing device further comprises a first elastic resetting piece and a second elastic resetting piece;

two ends of the first elastic reset piece are respectively connected between the swing frame and the second movable seat;

two ends of the second elastic reset piece are respectively connected between the swing frame and the second movable seat;

the first elastic resetting piece and the second elastic resetting piece are respectively positioned on two sides of the rotation axis of the swing frame.

In one embodiment, the second driving mechanism includes a first lead screw, a second lead screw, a transmission assembly and a driving motor;

the first screw rod is rotatably arranged on the first guide column;

the second screw rod is rotatably arranged on the second guide column;

the first screw rod and the second screw rod are in transmission connection through the transmission assembly;

the driving motor is connected between the first guide column and the first screw rod and is used for driving the first screw rod to rotate;

the film feeding frame is in threaded connection with the outer side of the first screw rod;

the first movable seat is in threaded connection with the outer side of the second screw rod.

The invention has the beneficial effects that:

the centering shaft on the centering frame can be inserted into the central hole of the workpiece placed on the rotating table under the action of the elastic piece, so that centering work is completed, the axis of the centering shaft coincides with the axis of the rotating table, the central line of the workpiece placed on the rotating table always coincides with the axis of the rotating table, meanwhile, the centering shaft is inserted into the central hole of the workpiece, the centering shaft plays a good role in constraining the rotating table, and the situation that the workpiece is thrown out in the process of following the rotation of the centering frame can be effectively avoided. When the film is wound, the film fed out from the film roll on the film feeding frame can be pressed on a workpiece through the pressing device, the first driving mechanism drives the rotating platform to rotate so as to drive the workpiece placed on the rotating platform to rotate, and meanwhile, the second driving mechanism drives the pressing device and the film feeding frame to simultaneously ascend, so that the film fed out from the film roll is wound on the workpiece. In the process of winding the film on the workpiece, the pressing device can play a role in pressing, so that the film is wound on the workpiece more tightly. When the film feeding frame and the pressing device rise to the top of the workpiece under the action of the second driving mechanism, the film fed out by the film roll is wound on the top of the workpiece, the pressing device continues to move upwards to push the centering frame to move upwards, so that the centering shaft is separated from the central hole of the workpiece, and the workpiece wound with the film is conveniently taken down from the rotating table.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural view of a centering and packaging machine according to an embodiment of the present application;

FIG. 2 is a schematic structural view of the film feeding frame shown in FIG. 1;

fig. 3 is a schematic structural view of the pressing device shown in fig. 1;

FIG. 4 is an enlarged view of a portion of FIG. 1 at A;

FIG. 5 is a partial schematic view of the second guide post shown in FIG. 1;

FIG. 6 is a cross-sectional view B-B shown in FIG. 5;

fig. 7 is a partial enlarged view of fig. 1 at C.

Icon: a centering packer 100; a base 10; a first guide post 11; a first bar hole 111; a second guide post 12; a second bar-shaped hole 121; a limiting groove 122; a vertical slot 1221; a circular arc groove 1222; a guide groove 123; an annular portion 13; a rotary table 20; a first rotating shaft 21; a first drive mechanism 30; a motor 31; a first pulley 32; a second pulley 33; a belt 34; a film feeding frame 40; a damping device 41; a connecting rod 411; a tensioner 412; a tension spring 413; a placement plate 42; a positioning shaft 43; a first slide portion 44; a pressing device 50; a first movable base 51; the second slide portion 511; a second movable seat 52; a second rotating shaft 521; a drive unit 53; a swing frame 54; a first free end 541; a second free end 542; a first pinch roller 55; a second pinch roller 56; a first elastic return member 57; a second resilient return member 58; the second drive mechanism 60; a first lead screw 61; a second lead screw 62; a transmission assembly 63; a first synchronizing wheel 631; a second synchronizing wheel 632; a synchronous belt 633; a drive motor 64; a centering bracket 70; a centering shaft 71; a fixed shaft 711; a rotation shaft portion 712; a conical portion 713; a frame body 72; a guide hole 721; the projection 722; a cylindrical portion 723; a positioning hole 724; an annular snap projection 7241; a second shaft protrusion 7242; a sleeve 73; a ring clamp groove 731; a projection 732; a first boss 733; a drive member 74; a cutter 75; an elastic member 80; a workpiece 200; a central bore 210; a film roll 300.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the application is used, or the orientation or the positional relationship which is usually understood by those skilled in the art, or the orientation or the positional relationship which is usually placed when the product of the application is used, and is only for convenience of describing and simplifying the description, and does not indicate or imply that the indicated centering packaging machine or the component must have a specific orientation, be configured and operated in a specific orientation, and therefore, cannot be understood as limiting the application. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Examples

The embodiment of the present application provides a centering packaging machine 100, which includes a base 10, a rotating table 20, a first driving mechanism 30, a film feeding rack 40, a material pressing device 50, a second driving mechanism 60, a centering rack 70, and an elastic member 80.

The base 10 is provided with a first guide post 11 and a second guide post 12 at intervals. The rotary table 20 is rotatably disposed on the base 10, the rotary table 20 is disposed between the first guide post 11 and the second guide post 12, and the rotary table 20 is used for placing the workpiece 200. The first driving mechanism 30 is connected between the rotary table 20 and the base 10, and the first driving mechanism 30 is used for driving the rotary table 20 to rotate around a vertical axis relative to the base 10. The film feeding frame 40 is vertically movably arranged on the first guide post 11, and the film feeding frame 40 is used for placing the film roll 300. The pressing device 50 is vertically movably disposed on the second guide post 12, and the pressing device 50 is configured to press the film fed from the film roll 300 onto the workpiece 200. The second driving mechanism 60 is connected to the base 10, the film feeding frame 40 and the pressing device 50 are both connected to the second driving mechanism 60, and the second driving mechanism 60 is used for driving the film feeding frame 40 and the pressing device 50 to synchronously ascend or synchronously descend. The centering rack 70 is vertically movably disposed on the second guide post 12, and a centering shaft 71 coaxial with the rotating table 20 is disposed on the centering rack 70. The elastic member 80 acts between the second guide post 12 and the centering frame 70, and the elastic member 80 is used for driving the centering frame 70 to move vertically downward, so that the centering shaft 71 is inserted into the central hole 210 of the workpiece 200 placed on the rotating table 20.

When the second driving mechanism 60 drives the film feeding frame 40 and the pressing device 50 to synchronously ascend to the top of the workpiece 200, the pressing device 50 can push the centering frame 70 to move upwards so as to separate the centering shaft 71 from the central hole 210.

In the operation process, an operator can lift the centering rack 70 upwards, after the workpiece 200 is placed on the rotating table 20, the centering rack 70 is released, the centering rack 70 moves downwards under the action of the elastic piece 80, and the centering shaft 71 on the centering rack 70 is inserted into the central hole 210 of the workpiece 200, so that centering work is completed, because the axis of the centering shaft 71 is overlapped with the axis of the rotating table 20, the central line of the workpiece 200 placed on the rotating table 20 is always overlapped with the axis of the rotating table 20, meanwhile, the centering shaft 71 is inserted into the central hole 210 of the workpiece 200, the centering shaft 71 plays a good role in restraining the rotating table 20, and the situation that the workpiece 200 is thrown out in the process of rotating along with the centering rack 70 can be effectively avoided.

When winding the film, the film roll 300 is placed on the film feeding frame 40, and the film roll 300 can rotate on the film feeding frame 40 to realize the film feeding action. The worker can pull the film on the film roll 300, press the free end of the film on the workpiece 200 through the pressing device 50, the first driving mechanism 30 drives the rotating platform 20 to rotate so as to drive the workpiece 200 placed on the rotating platform 20 to rotate, and meanwhile, the second driving mechanism 60 drives the pressing device 50 and the film feeding frame 40 to simultaneously ascend, so that the film fed out from the film roll 300 is wound on the workpiece 200. In the process of winding the film on the workpiece 200, the pressing device 50 can perform a pressing function to realize pressing while winding, so as to wind the film on the workpiece 200 more tightly. When the film feeding frame 40 and the pressing device 50 are lifted to the top of the workpiece 200 by the second driving mechanism 60, the film fed from the film roll 300 is wound on the top of the workpiece 200, the entire workpiece 200 is wound with the film, and the pressing device 50 continues to move upward to push the centering frame 70 to move upward, so that the centering shaft 71 is separated from the center hole 210 of the workpiece 200, and the workpiece 200 wound with the film is conveniently taken off from the rotating table 20.

The base 10 is a plate-shaped structure, the first guide column 11 and the second guide column 12 are both perpendicular to the base 10, and the first guide column 11 and the second guide column 12 are both hollow cylinders.

The rotating platform 20 is rotatably connected with the base 10 through a first rotating shaft 21, the first rotating shaft 21 is fixed at the bottom of the rotating platform 20, the first rotating shaft 21 is coaxially arranged with the rotating platform 20, and the first rotating shaft 21 is rotatably connected with the base 10 through a bearing.

In this embodiment, the upper surface of the base 10 is provided with the annular portion 13, and the outer peripheral wall of the rotary table 20 forms a rotating fit with the inner peripheral wall of the annular portion 13, so as to improve the stability of the rotary table 20 during rotation. The upper surface of the rotary table 20 is used for placing the workpiece 200, and the upper surface of the rotary table 20 is higher than the upper end surface of the ring portion 13.

Illustratively, the first driving mechanism 30 includes a motor 31, a first pulley 32, a second pulley 33 and a belt 34, the motor 31 is fixed on the base 10, the first pulley 32 is fixed on an output shaft of the motor 31, the second pulley 33 is fixed on the first rotating shaft 21, and the first pulley 32 and the second pulley 33 are in transmission connection through the belt 34. The motor 31 works to drive the first belt wheel 32 to rotate, the first belt wheel 32 drives the second belt wheel 33 to rotate through the belt 34, the second belt wheel 33 drives the first rotating shaft 21 to rotate, and finally the rotating table 20 is rotated.

The motor 31 is located outside the annular portion 13, the second belt wheel 33 is located inside the annular portion 13, and a through hole through which the belt 34 passes is formed in the annular portion 13.

As shown in fig. 2, the film feeding frame 40 is provided with a damping device 41, and the damping device 41 is used for generating a damping action on the film roll 300.

The damping device 41 comprises a connecting rod 411, a tension wheel 412 and a tension spring 413, one end of the connecting rod 411 is rotatably connected with the film feeding frame 40, the tension wheel 412 is rotatably connected with the other end of the connecting rod 411, the rotating axis of the tension wheel 412 is parallel to the rotating axis of the connecting rod 411, and the tension spring 413 is connected between the connecting rod 411 and the film feeding frame 40. The tension spring 413 presses the tension roller 412 against the film roll 300 to damp the film roll 300, thereby preventing the film on the film roll 300 from being excessively withdrawn and loosened by the inertial rotation of the film feeding frame 40.

Illustratively, the film feeding frame 40 includes a placing plate 42, a positioning shaft 43, and a first sliding portion 44, wherein the positioning shaft 43 is fixed on the placing plate 42, and the first sliding portion 44 is fixed on one side of the placing plate 42. The damping device 41 is provided on the placing plate 42.

After the film roll 300 is placed on the placing plate 42 and the film roll 300 is fitted over the positioning shaft 43, the film roll 300 may be rotated about the positioning shaft 43, thereby gradually withdrawing the film.

With reference to fig. 1, the first sliding portion 44 is vertically movably disposed in the first guiding pillar 11, and the first guiding pillar 11 is provided with a first strip-shaped hole 111 for allowing the first sliding portion 44 to move up and down.

Referring to fig. 1 and 3, the pressing device 50 includes a first movable base 51, a second movable base 52, a driving unit 53, a swing frame 54, a first pressing wheel 55, and a second pressing wheel 56. The first movable seat 51 is vertically movably disposed on the second guide post 12. The second movable seat 52 is horizontally movably disposed on the first movable seat 51. The swing frame 54 is rotatably disposed on the second movable seat 52 around a vertical axis, the swing frame 54 has a first free end 541 and a second free end 542, and the first pressing wheel 55 and the second pressing wheel 56 are rotatably disposed on the first free end 541 and the second free end 542, respectively. The driving unit 53 is connected between the first movable base 51 and the second movable base 52, and the driving unit 53 is configured to drive the second movable base 52 to horizontally move relative to the first movable base 51, so that the first pressing wheel 55 and the second pressing wheel 56 press the film fed from the film roll 300 onto the workpiece 200.

In operation, after the workpiece 200 is placed on the rotating table 20 and centered by the centering shaft 71, the driving unit 53 can drive the second movable seat 52 to move horizontally relative to the first movable seat 51 to approach the workpiece 200, and since the swing frame 54 is rotatably disposed on the second movable seat 52 around the vertical axis, the swing frame 54 has self-adjusting capability, so that the first pressing wheel 55 and the second pressing wheel 56 can both press the film onto the workpiece 200, i.e., the first pressing wheel 55 and the second pressing wheel 56 can both press the film onto the workpiece 200 wound with the film. When the workpiece 200 needs to be taken out, the driving unit 53 can drive the second movable seat 52 to move horizontally relative to the first movable seat 51 to be away from the workpiece 200, so that the first pressing wheel 55 and the second pressing wheel 56 are away from the workpiece 200.

Illustratively, the first movable seat 51 and the second movable seat 52 are both plate-shaped structures, one end of the second movable seat 52 is movably inserted on the first movable seat 51, one end of the first movable seat 51, which is far away from the second movable seat 52, is provided with a second sliding portion 511, which is vertically movably disposed in the second guide post 12, and the second movable seat 52 is provided with a second strip-shaped hole 121, which allows the second sliding portion 511 to move up and down. The swing frame 54 is substantially V-shaped, and the middle position thereof is rotatably connected to the second movable base 52 through a second rotating shaft 521, and the rotating axis of the first pressing wheel 55 and the rotating axis of the second pressing wheel 56 are both parallel to the rotating axis of the swing frame 54.

In a non-limiting example, the driving unit 53 is a pneumatic cylinder, the cylinder body of which is fixed to the first movable seat 51, and the piston rod of which is fixed to the second movable seat 52. The second movable seat 52 can move through the expansion and contraction of the air cylinder, the structure is simple, and the second movable seat 52 can move quickly and sensitively.

Optionally, as shown in fig. 3, the pressing device 50 further includes a first elastic restoring member 57 and a second elastic restoring member 58. The two ends of the first elastic restoring element 57 are respectively connected between the swing frame 54 and the second movable seat 52.

Two ends of the second elastic restoring element 58 are respectively connected between the swing frame 54 and the second movable seat 52. The first elastic restoring member 57 and the second elastic restoring member 58 are respectively located on both sides of the rotation axis of the swing frame 54.

The swing frame 54 can be reset under the action of the first elastic reset piece 57 and the second elastic reset piece 58, the swing frame 54 is always kept at the position facing the workpiece 200, and the position of the swing frame 54 does not need to be manually adjusted before the driving unit 53 drives the second movable seat 52 to move.

Illustratively, first elastic restoring member 57 and second elastic restoring member 58 are both springs.

Alternatively, as shown in fig. 1, the second driving mechanism 60 includes a first lead screw 61, a second lead screw 62, a transmission assembly 63, and a driving motor 64. The first lead screw 61 is rotatably disposed on the first guide post 11. The second lead screw 62 is rotatably disposed on the second guide post 12. The first lead screw 61 and the second lead screw 62 are in transmission connection through a transmission assembly 63. The driving motor 64 is connected between the first guide post 11 and the first lead screw 61, and the driving motor 64 is used for driving the first lead screw 61 to rotate. The film feeding frame 40 is screwed to the outer side of the first screw rod 61. The first movable seat 51 is screwed on the outer side of the second screw 62.

When the driving motor 64 drives the first lead screw 61 to rotate, the second lead screw 62 rotates synchronously with the first lead screw 61 under the action of the transmission assembly 63, so that the film feeding frame 40 and the pressing device 50 move synchronously. When the film feeding frame 40 ascends, the material pressing device 50 ascends; when the film feeding frame 40 descends, the pressing device 50 descends.

Specifically, the driving motor 64 is fixed on the top of the second guide post 12, the driving motor 64 is connected with the first lead screw 61 through a coupling, both ends of the first lead screw 61 are rotatably connected with the first guide post 11 through a bearing, and the first sliding part 44 of the film feeding frame 40 is screwed on the outer side of the first lead screw 61. Both ends of the second screw rod 62 are rotatably connected with the second guide post 12 through bearings, and the second sliding part 511 of the first movable seat 51 is screwed on the outer side of the second screw rod 62.

Illustratively, the transmission assembly 63 is located in the base 10, the transmission assembly 63 includes a first synchronizing wheel 631, a second synchronizing wheel 632 and a timing belt 633, the first synchronizing wheel 631 is fixed to the first screw rod 61, the second synchronizing wheel 632 is fixed to the second screw rod 62, and the first synchronizing wheel 631 and the second synchronizing wheel 632 are in transmission connection through the timing belt 633. Wherein the gear ratio of the first 631 and second 632 synchronizing wheels is 1.

Referring to fig. 1 and 4, the centering bracket 70 includes a bracket body 72, a sleeve 73, and a driving member 74.

The frame body 72 and the sleeve 73 are sleeved on the second guide post 12, the frame body 72 is axially locked and is circumferentially rotatably connected to the sleeve 73, and the sleeve 73 is circumferentially locked and is axially movably connected to the second guide post 12; the centering shaft 71 is fixedly arranged on the frame body 72. The driving member 74 is connected between the socket 73 and the frame body 72, and the driving member 74 is used for driving the frame body 72 to rotate a preset angle relative to the socket 73 when the centering shaft 71 is disengaged from the central hole 210, so as to stagger the frame body 72 from the workpiece 200.

It should be noted that, since the frame body 72 is axially locked and circumferentially rotatably connected to the sleeve 73, that is, the frame body 72 cannot axially move relative to the sleeve 73, the frame body 72 can rotate relative to the sleeve 73. Since the sleeve 73 is connected to the second guide post 12 in a circumferentially locked axially displaceable manner, the sleeve 73 cannot rotate relative to the second guide post 12, and the sleeve 73 can move vertically relative to the second guide post 12. The carriage 72 and the sleeve 73 are capable of moving together vertically relative to the second guide post 12.

In the film winding process, when the driving motor 64 of the second driving mechanism 60 operates to simultaneously raise the film feeding frame 40 and the pressing device 50, after the film is wound on the top of the workpiece 200, the first movable seat 51 of the pressing device 50 pushes the centering frame 70 to move upward as a whole, and when the centering shaft 71 is disengaged from the central hole 210, the driving member 74 drives the sleeve 73 to rotate by a preset angle, so that the frame body 72 is staggered from the workpiece 200, and the workpiece 200 wound with the film is conveniently removed from the rotating table 20.

Optionally, a cutter 75 is disposed on the frame 72, and the cutter 75 is used for cutting the film between the workpiece 200 and the film roll 300 in the process that the driving member 74 drives the frame 72 to rotate relative to the sleeve 73 by a preset angle.

After the film fed from the film roll 300 is wound around the top of the work 200 from the bottom of the work 200, the film between the work 200 and the film roll 300 needs to be cut. In this embodiment, by arranging the cutter 75 on the frame body 72, the driving member 74 drives the frame body 72 to rotate relative to the sleeve 73 by a preset angle, the cutter 75 rotates along with the frame body 72, and the movement track of the cutter 75 is an arc track taking the axis of the second guide column 12 as the center, so that the film is cut off, the film is automatically cut off, and the film is not required to be manually cut off.

As shown in fig. 4, the frame body 72 is provided with a guide hole 721 for the second guide post 12 to pass through, and a protrusion 722 is provided on the hole wall of the guide hole 721. As shown in fig. 5, the outer side wall of the second guide post 12 is provided with a limiting groove 122, the limiting groove 122 includes a vertical groove 1221 arranged along the axial direction of the second guide post 12 and an arc groove 1222 arranged along the circumferential direction of the second guide post 12, and one end of the vertical groove 1221 is communicated with one end of the arc groove 1222. With continued reference to fig. 4, the protrusion 722 is captured in the retaining groove 122. When the centering shaft 71 is inserted into the central hole 210, the projection 722 is located in the vertical groove 1221. When the protrusion 722 is located at the intersection of the vertical slot 1221 and the circular-arc slot 1222, the centering shaft 71 is disengaged from the central hole 210.

When the protruding portion 722 is located in the vertical groove 1221, the vertical groove 1221 limits the protruding portion 722, so that the frame body 72 cannot rotate the sleeve 73 first, and when the centering shaft 71 is inserted into the central hole 210, the centering shaft 71 cannot apply radial force to the workpiece 200, thereby ensuring the stability of the workpiece 200 in the rotating process along with the rotating table 20. When the sleeve 73 and the frame body 72 move upward under the action of the pressing device 50, the protrusion 722 will move to the intersection of the vertical groove 1221 and the arc groove 1222, at this time, the centering shaft 71 is disengaged from the central hole 210, the arc groove 1222 does not play a role of circumferential limitation, and the driving member 74 can drive the frame body 72 to rotate by a preset angle relative to the sleeve 73 and the second guide post 12. During rotation of the frame 72 relative to the sleeve 73, the projection 722 will move within the circular arc slot 1222.

The magnitude of the predetermined angle depends on the central angle of the arc slot 1222. Illustratively, as shown in fig. 6, the circular arc slot 1222 has a central angle of 90, i.e., a predetermined angle of 90.

With reference to fig. 4, in the present embodiment, the driving element 74 is a torsion spring sleeved on the second guiding post 12, and the torsion spring acts between the sleeve 73 and the frame 72.

Further, the frame body 72 has a cylindrical portion 723, the cylindrical portion 723 is sleeved outside the second guide post 12, and the guide hole 721 is disposed on the cylindrical portion 723. The cylindrical portion 723 is provided with a positioning hole 724 having a larger diameter than the guide hole 721, one end of the guide hole 721 penetrates through one axial end of the cylindrical portion 723, the other end of the guide hole 721 communicates with one end of the positioning hole 724, and the other end of the positioning hole 724 penetrates through the other axial end of the cylindrical portion 723. In the locating hole 724 was located to sleeve 73, be equipped with ring groove 731 on the periphery wall of sleeve 73, be equipped with the annular card protruding 7241 of card in ring groove 731 on the pore wall of locating hole 724 to it is rotatable to realize that the axial locking circumference of support body 72 relative sleeve 73 is rotatable.

The outer peripheral wall of the second guide post 12 is provided with a vertically arranged guide groove 123, the inner peripheral wall of the sleeve 73 is provided with a projection 732, and the projection 732 is clamped in the guide groove 123, so that the sleeve 73 can move axially relative to the circumferential locking of the second guide post 12.

The torsion spring is limited in the positioning hole 724 by the sleeve 73, namely, the sleeve 73 limits the torsion spring. A first boss 733 is provided on one axial end surface of the sleeve 73. The hole end wall of the positioning hole 724 is provided with a second shaft protrusion 7242. One free end of the torsion spring abuts against the first boss 733 and the other free end of the torsion spring abuts against the second boss 7242. When the protrusion 722 is engaged in the vertical slot 1221, the torsion spring accumulates elastic force, and when the protrusion 722 is located at the intersection of the vertical slot 1221 and the arc slot 1222, the torsion spring accumulates elastic force to drive the frame 72 to rotate by a predetermined angle relative to the sleeve 73.

In this embodiment, the elastic element 80 is a spring, the elastic element 80 is sleeved outside the second guiding column 12, and two ends of the elastic element 80 respectively abut against the cylindrical portion 723 and the step surface on the second guiding column 12.

As shown in fig. 7, the centering shaft 71 includes a fixed shaft portion 711 and a rotating shaft portion 712. The fixed shaft 711 is fixed to the centering bracket 70. The rotating shaft portion 712 is rotatably provided in the fixed shaft portion 711, and the rotating shaft portion 712 is provided coaxially with the fixed shaft portion 711. The rotating shaft portion 712 has a conical portion 713 for insertion into the center hole 210.

Because the rotating shaft portion 712 can rotate relative to the fixed shaft portion 711, when the conical portion 713 of the rotating shaft portion 712 is inserted into the central hole 210 of the workpiece 200 to center the workpiece 200, the workpiece 200 rotates to drive the rotating shaft portion 712 to rotate, the rotating shaft portion 712 does not affect the rotation of the workpiece 200, and the smoothness of the workpiece 200 in the rotating process along with the rotating table 20 is ensured.

Illustratively, the rotating shaft portion 712 and the fixed shaft portion 711 are coupled by a bearing to achieve rotational coupling therebetween.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A centering wrapping machine, comprising:

the device comprises a base, a first guide post and a second guide post, wherein the first guide post and the second guide post are arranged at intervals;

the rotating table is rotatably arranged on the base, is positioned between the first guide column and the second guide column and is used for placing a workpiece;

the film feeding frame is vertically movably arranged on the first guide column and used for placing a film roll;

the pressing device is vertically movably arranged on the second guide column and is used for pressing the film fed out from the film roll onto the workpiece;

the centering frame is vertically movably arranged on the second guide column, and a centering shaft coaxial with the rotating table is arranged on the centering frame; and

when the second driving mechanism drives the film feeding frame and the pressing device to synchronously ascend to the top of the workpiece, the pressing device can push the centering frame to move upwards so that the centering shaft is separated from the central hole;

the centering frame comprises a frame body, a sleeve and a driving piece;

2. The centering and packaging machine as claimed in claim 1, wherein the frame body is provided with a cutter;

3. The centering and packaging machine as claimed in claim 1, wherein the frame body is provided with a guide hole for the second guide post to pass through, and a protrusion is provided on a hole wall of the guide hole;

4. The centering and packaging machine as claimed in claim 3, wherein the frame body has a cylindrical portion fitted around an outer side of the second guide post;

5. The centering and packaging machine as claimed in claim 4, wherein the driving member is a torsion spring sleeved on the second guiding column;

the torsion spring is limited in the positioning hole by the sleeve;

a first shaft boss is arranged on one axial end face of the sleeve;

6. The centering packer as claimed in claim 1, wherein the centering shaft comprises a fixed shaft portion and a rotating shaft portion;

the fixed shaft part is fixed on the centering frame;

7. The centering and packaging machine as claimed in claim 1, wherein the pressing device comprises a first movable seat, a second movable seat, a driving unit, a swing frame, a first pressing wheel and a second pressing wheel;

8. The centering and packaging machine according to claim 7, wherein said pressing device further comprises a first elastic return member and a second elastic return member;

9. The centering packer as claimed in claim 7, wherein the second driving mechanism comprises a first lead screw, a second lead screw, a transmission assembly and a driving motor;

the first screw rod is rotatably arranged on the first guide column;

the second screw rod is rotatably arranged on the second guide column;