Automatic strapping device

Abstract

The present invention discloses an automatic connecting device for strapping straps, which is used to connect a first connecting part at the end of a first strapping strap and a second connecting part at the head end of a second strapping strap. The device comprises a support frame, a strapping strap limiting mechanism, a strap pressing and welding mechanism, a shaping mechanism, a first driving device and a second driving device. The strapping strap limiting mechanism is used to make the first connecting part and the second connecting part overlap each other in a third direction; the strap pressing and welding mechanism is used to make the first connecting part and the second connecting part welded together, and the thickness after welding is basically consistent with the thickness of the strapping strap; the shaping mechanism is used to cut off the excess width of the welded part. The automatic connecting device for strapping straps realizes seamless connection of two rolls of strapping straps, thereby improving production efficiency; moreover, the thickness and width of the connecting part are basically consistent with the thickness and width of the strapping strap itself, thereby ensuring that the strapping strap after connection can pass through the head of the strapping machine without obstacles, thereby ensuring the efficiency and stability of the strapping process.

Description

Technical Field

[0001] The invention relates to the technical field of packaging, in particular to an automatic connecting device for a strapping belt. Background Art

[0002] The baler wraps the strapping tape around the items to be packaged, tightens the strapping tape and fixes its two ends so that the strapping tape is in close contact with the surface of the packaged items, ensuring that the packages will not fall apart during transportation and storage due to loose strapping, while keeping the strapping neat and beautiful.

[0003] The strapping mechanism of an existing baling machine is generally only equipped with one strapping reel. When the strapping reel on the strapping reel is used up, the machine needs to be stopped and a new strapping reel needs to be manually connected before continuing to operate. Each time the strapping reel is used up, the machine needs to be stopped for connection, so the production efficiency is low. In order to solve this problem, Chinese patent CN117963227A discloses an automatic strapping reel connection device, which realizes the seamless connection of two rolls of strapping, avoids equipment shutdown caused by replacing strapping reels, and thus improves operating efficiency. However, the automatic strapping reel connection device welds the head end of the second strapping reel to the end of the first strapping reel by heating, resulting in the thickness and width of the joint being larger than the strapping reel itself, and cannot smoothly pass through the strapping machine head with higher precision. Summary of the invention

[0004] The object of the present invention is to provide an improved automatic connecting device for strapping straps, which can effectively solve the problem of increased thickness and width of the strapping straps due to connecting in the prior art, so that the strapping straps can still pass smoothly through the strapping machine head after connecting, thereby improving the overall packaging efficiency.

[0005] An automatic connecting device for a strapping belt, used for connecting a first connecting portion at the end of a first strapping belt and a second connecting portion at the head end of a second strapping belt, the device comprising:

[0006] The support frame has a first direction, a second direction and a third direction, the second direction is perpendicular to the first direction, the third direction is perpendicular to the first direction and the second direction, and the support frame is provided with a first belt groove and a second belt groove;

[0007] The strapping belt limiting mechanism is arranged on the support frame, and includes a first limiting structure and a second limiting structure that can move between a working position and an avoidance position along a first direction. When the first limiting structure and the second limiting structure are in the working position, they are respectively used to limit the first connecting portion of the first strapping belt and the second connecting portion of the second strapping belt, so that the first connecting portion and the second connecting portion overlap each other in the third direction;

[0008] The strap pressing and welding mechanism is arranged on the support frame, and includes a pad, a first strap pressing assembly, a welding assembly and a second strap pressing assembly, the pad is located on one side of the strapping strap limiting mechanism along the first direction, the first strap pressing assembly, the welding assembly and the second strap pressing assembly are located on the other side of the strapping strap limiting mechanism along the first direction, the first strap pressing assembly and the second strap pressing assembly can move between a pressing position and a releasing position respectively, and cooperate with the pad in the pressing position to fix the end of the first strapping strap and the head end of the second strapping strap respectively; the welding assembly includes a force-applying member and a friction member, the force-applying member can move between an extended position and a retracted position along a third direction, the friction member can telescopically move along the third direction with the force-applying member, and can reciprocate relative to the force-applying member along the first direction, the friction member cooperates with the pad to weld the first connecting portion and the second connecting portion together, and the thickness after welding is substantially consistent with the thickness of the strapping strap; and

[0009] A shaping mechanism is arranged on the support frame, comprising a first cutter and a second cutter arranged at intervals along the first direction, the first cutter and the second cutter are used to cut off the excess width of the welded part;

[0010] a first driving device connected to the first limiting structure, the second limiting structure, the first belt pressing assembly, the second belt pressing assembly and the force applying member; and

[0011] The second driving device is connected to the friction member.

[0012] In one embodiment, the support frame includes a first support plate and a second support plate, the first support plate is parallel to a plane defined by the first direction and the second direction, the second support plate is parallel to a plane defined by the second direction and the third direction, the first end of the second support plate along the third direction is fixed to the first support plate, the second support plate is provided with a accommodating cavity with an opening toward the second end of the second support plate along the third direction, the first belt groove and the second belt groove are respectively located on the second support plate on both sides of the accommodating cavity and close to the second end thereof along the third direction, the pad is arranged opposite to the opening of the accommodating cavity, and the first belt pressing assembly, the welding assembly and the second belt pressing assembly are located in the accommodating cavity.

[0013] In one embodiment, the strapping belt limiting mechanism comprises:

[0014] A slide plate, the slide plate being capable of sliding along a first direction, and having two ends thereof in a second direction perpendicular to the first direction being respectively fixed to a first fixing seat and a second fixing seat, wherein the first fixing seat and the second fixing seat are mounted on the second supporting plate;

[0015] A limiting member, wherein the limiting member is connected to a first end of the slide plate along a first direction, a first limiting step for limiting the width direction of the first connecting portion is formed between a first side surface of the limiting member along the first direction and an end surface of the first end of the slide plate, and a second limiting step for limiting the width direction of the second connecting portion is formed between a second side surface of the limiting member along the first direction and an end surface of the first end of the slide plate;

[0016] A first limiting portion, disposed at a first end of the limiting member along the second direction, and forming a third limiting step between the first side surface of the limiting member for limiting the end of the first connecting portion; and

[0017] The second limiting portion is arranged at the second end of the limiting member along the second direction, and forms a fourth limiting step between the second limiting portion and the second side surface of the limiting member for limiting the end of the second connecting portion.

[0018] In one embodiment, the strapping strap limiting mechanism also includes an in-place detection component, which includes a sensing sheet, a reset component and an in-place sensor. The sensing sheet is rotatably mounted on the slide, and one end of the sensing sheet is provided with the first limiting portion; the reset component is used to reset the sensing sheet to an initial position, and the in-place sensor is used to detect the position of the sensing sheet.

[0019] In one embodiment, the second limiting portion and the limiting member are an integral structure.

[0020] In one embodiment, the shaping mechanism also includes a tool holder, which is located on the second side of the pad, mounted on a support frame, and capable of moving between an extended position and a retracted position along a third direction. The first end of the first cutter and the second cutter along the third direction is connected to the tool holder, and a first blade is provided at the second end. The friction member is provided with second blades on both sides along the second direction, and the second blade cooperates with the first blade on the first cutter and the second cutter.

[0021] In one embodiment, the shaping mechanism also includes a guide column and a transmission shaft, and the guide column and the transmission shaft both extend along a third direction, the guide column cooperates with the guide hole on the second fixed seat, one end of the guide column is connected to the tool holder, the transmission shaft cooperates with the axial hole on the first fixed seat, and one end of the transmission shaft is connected to the tool holder, and the other end extends out of the axial hole and is connected to the connecting block, and the connecting block is connected to the first driving device.

[0022] In one embodiment, the belt pressing and welding mechanism also includes a mounting seat, the mounting seat is installed in the accommodating cavity, and a mounting cavity is provided on the mounting seat, and the first belt pressing assembly, the welding assembly and the second belt pressing assembly are installed in the mounting cavity.

[0023] In one embodiment, the welding assembly also includes a connecting member, which has a first guide block and a second guide block, and a first guide groove and a second guide groove extending along the first direction are respectively provided on a side surface of the second end of the friction member along the third direction and the first end of the force-applying member along the third direction, and the first guide block and the second guide block are respectively located in the first guide groove and the second guide groove.

[0024] In one embodiment, the force-applying member includes a driving member, a transmission member and a force-applying spring. The first end of the driving member along the third direction is connected to the friction member, and the second end is inserted into the mounting cavity and is provided with a blind hole. The force-applying spring is installed in the blind hole, and one end of the transmission member along the third direction is inserted into the blind hole.

[0025] The above-mentioned automatic connecting device for strapping straps realizes seamless connection of two rolls of strapping straps, thereby improving production efficiency; moreover, the thickness and width of the connecting part are substantially consistent with the thickness and width of the strapping straps themselves, thereby ensuring that the connected strapping straps can pass through the head of the strapping machine without obstacles, thereby ensuring the efficiency and stability of the strapping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of an automatic connecting device for strapping belts in one embodiment of the present invention;

[0027] Figure 2 for Figure 1 A three-dimensional view of the automatic strapping device shown behind a hidden housing;

[0028] Figure 3 for Figure 1 The exploded schematic diagram of the automatic strapping device after the shell is hidden;

[0029] Figure 4 For attachment Figure 2 A top view of

[0030] Figure 5 For along Figure 4 Sectional view of the mid-CC line;

[0031] Figure 6 for Figure 1 A three-dimensional view of a support frame equipped with a first motor and a second motor;

[0032] Figure 7 for Figure 1 A three-dimensional diagram of the strapping and welding mechanisms of the automatic strapping device shown;

[0033] Figure 8 for Figure 1 A top view of the strapping and welding mechanism of the automatic strapping device shown;

[0034] Fig. 9 for Figure 8 Cross-sectional view along direction BB;

[0035] Fig.10 for Figure 1 A three-dimensional diagram of the position limiting and shaping assembly of the automatic connecting device for the strapping belt shown;

[0036] Fig.11 for Fig.10 A three-dimensional view of the hidden knife holder, cutting knife, and backing plate;

[0037] Fig.12 is a three-dimensional diagram of a cam assembly;

[0038] Fig.13 is a three-dimensional diagram of a lever assembly;

[0039] Fig.14 It is a three-dimensional diagram of the crank-connecting rod mechanism.

[0040] Description of reference numerals:

[0041] 1. Shell; 11. Shell body; 12. Front cover; 13. First button; 14. Second button;

[0042] 2. Support frame; 21. First support plate; 22. Second support plate; 221. First support plate unit; 222. Second support plate unit; 223. Accommodating cavity; 224. First belt groove; 225. Second belt groove; 23. First bandwidth adjustment block; 24. Second bandwidth adjustment block; 25. Third support plate; 26. Fourth support plate;

[0043] 3. Pressing belt and welding mechanism;

[0044] 31. mounting seat; 314. mounting seat body; 315. cover plate;

[0045] 32, first belt pressing assembly; 321, first belt pressing member; 322, first force spring; 323, first transmission member; 324, first reset member; 325, first connecting pin; 326, first roller;

[0046] 33, second belt pressing assembly; 331, second belt pressing member; 332, second force spring; 333, second transmission member; 334, second reset member; 335, second connecting pin; 336, second roller;

[0047] 34, welding assembly; 341, friction member; 341a, first friction tooth; 342, driving member; 343, connecting member; 344, third transmission member; 345, third reset member; 346, third connecting pin; 347, third roller; 348, third force spring;

[0048] 4. Position limiting shaping assembly; 41. First fixing seat; 411. First fixing slot; 42. Second fixing seat; 421. Second fixing slot; 43. Slide plate; 431. Position limiting member; 432. Second position limiting portion; 44. Pad; 441. Second friction tooth; 442. Third friction tooth; 443. Fourth friction tooth; 451. Tool holder; 452. First cutter; 454. Guide column; 455. Transmission shaft; 456. Connecting block; 461. Sensor sheet; 461a. First position limiting portion; 462. Fourth resetting component; 463. In-position sensor; 464. Fifth resetting component;

[0049] 5. The first drive motor;

[0050] 6. Cam assembly; 601. Cam main shaft; 604. First cam; 605. Second cam; 606. Third cam; 607. Fourth cam; 608. Fifth cam;

[0051] 10. Lever assembly; 602. First secondary shaft; 603. Second secondary shaft; 609. First connecting rod; 610. Second connecting rod; 611. Third connecting rod; 612. Fourth connecting rod; 613. Fifth connecting rod; 614. Sixth connecting rod; 615. Seventh connecting rod; 618. Fourth roller; 619. Fifth roller; 620. Sixth roller; 621. Seventh roller; 622. Eighth roller;

[0052] 7. Second drive motor;

[0053] 8. crank-connecting rod mechanism; 81. eccentric shaft; 82. eighth connecting rod;

[0054] 91. First strapping belt; 911. First connecting portion; 92. Second strapping belt; 921. Second connecting portion. DETAILED DESCRIPTION

[0055] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the specific details described below are only part of the embodiments of the present invention, and the present invention can also be implemented in many other embodiments different from those described herein. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0056] In this document, when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the clarity and convenience of expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in the present invention.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0058] See also Figure 1-5 The strapping automatic connection device comprises a support frame 2, a strapping limit mechanism, a strapping and welding mechanism 3, a shaping mechanism, a first driving device and a second driving device, wherein the support frame 2 has a first direction ( Figure 6 middle "X" direction), the second direction ( Figure 6 "Y" direction) and the third direction ( Figure 6 In the "Z" direction, the second direction is perpendicular to the first direction, the third direction is perpendicular to the first direction and the second direction, and the support frame has a first belt groove 224 for the first connecting portion of the first strapping belt 91 to pass through and a second belt groove 225 for the second connecting portion 921 of the second strapping belt 92 to pass through.

[0059] The strapping strap limiting mechanism is installed on the support frame 2, and the strapping strap limiting mechanism includes a first limiting structure and a second limiting structure that can move between a working position and an avoidance position along a first direction. When the first limiting structure and the second limiting structure are in the working position, they are used to limit the first connecting portion 911 of the first strapping strap 91 and the second connecting portion 921 of the second strapping strap 92, respectively, so that the first connecting portion 911 and the second connecting portion 921 overlap each other in the third direction.

[0060] The belt pressing and welding mechanism 3 is installed on the support frame 2, and includes a pad 44, a first belt pressing assembly 32, a welding assembly 34 and a second belt pressing assembly 33. The pad 44 is located on one side of the limiting member 431 along the first direction, and the first belt pressing assembly 32, the welding assembly 34 and the second belt pressing assembly 33 are located on the other side of the limiting member 431 along the first direction. The first belt pressing assembly 32 can move between a clamping position and a loosening position. When the first belt pressing assembly 32 is in the clamping position, it cooperates with the pad 44 to fix the ends of the first strapping belt 91 respectively; the second belt pressing assembly 33 can move between a clamping position and a loosening position. When the second belt pressing assembly 33 is in the clamping position, it cooperates with the pad 44 to fix the ends of the first strapping belt 91 respectively; the second belt pressing assembly 33 can move between a clamping position and a loosening position. When the second belt pressing assembly 33 is in the clamping position, it cooperates with the pad 44 It is used to fix the head end of the second strapping belt 92; the welding assembly 34 includes a force-applying member and a friction member 341, the force-applying member can move between a working position and an avoidance position, and the friction member 341 can reciprocate along a first direction relative to the force-applying member. When the friction member 341 is in the working position, it cooperates with the pad 44 to apply pressure between the stacked first connection part 911 and the second connection part 921. When the friction member 341 reciprocates along the first direction relative to the pad 44, it drives the first connection part 911 and the second connection part 921 to rub at a high frequency, so that the first connection part 911 and the second connection part 921 are welded together and the thickness is basically consistent with the thickness of the strapping belt.

[0061] The shaping mechanism is installed on the support frame 2, and includes a first cutter 452 and a second cutter (not shown in the figure). The first cutter 452 and the second cutter are arranged along the first direction and can be telescopically moved. When the first cutter 452 and the second cutter are extended, the excess width of the first connecting part 911 and the second connecting part 921 that are fused together is cut off.

[0062] The first driving device is connected to the limiting member 431 , the first belt pressing assembly 32 , the second belt pressing assembly 33 , and the transmission member; the second driving device is connected to the friction member 341 .

[0063] The automatic connecting device for the strapping strap of the present invention realizes seamless connection of two rolls of strapping straps, thereby improving production efficiency; moreover, the thickness and width of the connecting portion are substantially consistent with the thickness and width of the strapping strap itself, thereby ensuring that the connected strapping strap can pass through the head of the strapping machine without obstruction, thereby ensuring the efficiency and stability of the strapping process.

[0064] The specific structure of the automatic connecting device for strapping belts will be described in detail below in conjunction with specific embodiments.

[0065] The exemplary automatic connecting device for strapping also includes a housing 1, which plays a protective role. The exemplary housing 1 includes a housing body 11 and a front cover 12 installed on the front side of the housing body 11. A control circuit (not shown in the figure) is installed in the housing body 11. A first button 13 and a second button 14 are installed on the panel of the housing body 11, and the first button 13 and the second button 14 are connected to the control circuit.

[0066] See also Figure 6 As an example, the support frame 2 includes a first support plate 21 and a second support plate 22. The first support plate 21 is parallel to a plane defined by the first direction and the second direction, and the second support plate 22 is parallel to a plane defined by the second direction and the third direction. The first end of the second support plate 22 along the third direction is connected to one end of the first support plate 21. A receiving cavity 223 is provided in the middle of the second support plate 22. The second ends of the second support plate 22 along the third direction on both sides of the receiving cavity 223 are respectively provided with a first belt groove 224 and a second belt groove 225. Preferably, the second support plate 22 includes a first support plate unit 221 and a second support plate unit 222. The first support plate unit 221 and the second support plate unit 222 are arranged at intervals along the second direction, and the receiving cavity 223 is formed therebetween. The first ends of the first support plate unit 221 and the second support plate unit 222 along the third direction are fixed to the first support plate 21, and the second ends of the first support plate unit 221 and the second support plate unit 222 along the third direction are respectively provided with a first belt groove 224 and a second belt groove 225. As an alternative, the second support plate 22 may be an integral structure, and a portion of the second support plate 22 is cut out to form the accommodating cavity 223. The support frame 2 adopts this structure, which has the advantages of reasonable spatial layout and compact structure.

[0067] Preferably, the first support plate unit 221 is provided with a first bandwidth adjustment block 23 on one side along the second direction of the second end along the third direction, and the first bandwidth adjustment block 23 and the first support plate unit 221 together form a first belt slot 224. By replacing the first bandwidth adjustment blocks 23 of different widths, the width of the first belt slot 224 can be adjusted to adapt to strapping straps of different widths. Similarly, the second support plate unit 222 is provided with a second bandwidth adjustment block 24 on one side along the second direction of the second end along the third direction, and the second bandwidth adjustment block 24 and the second support plate unit 222 together form a second belt slot 225. By replacing the second bandwidth adjustment blocks 24 of different widths, the width of the second belt slot 225 can be adjusted to adapt to strapping straps of different widths.

[0068] In one embodiment, the support frame 2 also includes a third support plate 25 and a fourth support plate 26, and the third support plate 25 and the fourth support plate 26 are located on the first side of the second direction of the second support plate 22, the third support plate 25 and the fourth support plate 26 are parallel to the plane defined by the first direction and the third direction, and the two are arranged opposite to each other in the second direction, the third support plate 25 is connected to the first support plate 21 and the first support plate unit 221, and the fourth support plate 26 is connected to the first support plate 21 and the second support plate unit 222.

[0069] refer to Figures 7 to 9 The belt pressing and welding mechanism 3 as an example further includes a mounting seat 31, which is located in the middle of the accommodating cavity 223 and is fixed to the first supporting plate unit 221 and the second supporting plate unit 222 by screws, and a mounting cavity is provided on the mounting seat 31. The first belt pressing assembly 32 and the second belt pressing assembly 33 are installed in the mounting cavity.

[0070] As an example, the mounting seat 31 includes a mounting seat body 314 and a cover plate 315. A groove is provided on one side of the mounting seat body 314, and the cover plate 315 is covered at the opening of the groove to form a mounting cavity. The mounting seat 31 adopts such a split structure, which is convenient for processing.

[0071] As an example, the first belt pressing assembly 32 comprises a first belt pressing member 321, a first force spring 322, a first transmission member 323 and a first reset component 324, one end of the first belt pressing member 321 is provided with a pressure head, the other end is inserted into the mounting cavity and is provided with a first blind hole, the first force spring 322 is installed in the first blind hole, one end of the first transmission member 323 is inserted into the first blind hole, the other end stretches out of the mounting cavity and is provided with a first roller 326. The first reset component 324 is used to reset the first belt pressing member 321. The first reset component 324 in the present embodiment is a spring, one end of the first reset component 324 is connected to the first belt pressing member 321 by a first connecting pin 325, and the other end is fixed on the mounting seat 31. Since the first force spring 322 is all installed in the first belt pressing member 321, and the part of the first transmission member 323 is installed in the first belt pressing member 321, the length of the belt pressing assembly is greatly shortened, and the disassembly and assembly are simple, which greatly reduces the cost.

[0072] Similarly, the second belt pressing assembly 33 comprises a second belt pressing member 331, a second force spring 332, a second transmission member 333 and a second reset component 334, one end of the second belt pressing member 331 is provided with a pressure head, the other two ends are inserted in the mounting cavity, and are provided with a second blind hole, the second force spring 332 is installed in the second blind hole, one end of the second transmission member 333 is inserted in the second blind hole, the other end stretches out of the mounting cavity, and is provided with a second roller. The second reset component 334 is used to reset the second belt pressing member 331. The second reset component 334 in the present embodiment is a spring, one end of the second reset component 334 is connected with the second belt pressing member 331 by a second connecting pin 335, and the other end is fixed on the mounting base 31. Because the second force spring 332 is all installed in the second belt pressing member 331, the part of the second transmission member 333 is installed in the second belt pressing member 331, so that the length of the belt pressing assembly is greatly shortened, and the disassembly and assembly are simple, which greatly reduces the cost.

[0073] As an example, the welding assembly 34 also includes a connecting member 343, which is U-shaped and has a first guide block and a second guide block. The first end of the friction member 341 along the third direction is provided with a first friction tooth 341a, and the second end of the friction member along the third direction and the side surface of the first end of the force member along the third direction are respectively provided with a first guide groove and a second guide groove extending along the first direction, and the first guide block and the second guide block are respectively located in the first guide groove and the second guide groove. The friction member 341 is connected to the force member through the connecting member 343, so that the friction member can move telescopically along the third direction with the force member, and can reciprocate relative to the force member along the first direction.

[0074] As an example, the force applying member includes a driving member 342, a third force applying spring 348, a third transmission member 344 and a third reset member 345. The second end of the driving member 342 along the third direction is inserted into the mounting cavity and is provided with a third blind hole. The third force applying spring 348 is installed in the third blind hole. One end of the third transmission member 344 along the third direction is inserted into the third blind hole, and the other end is provided with a third roller 347. The third reset member 345 is used to reset the driving member 342. The third reset member 345 in this embodiment is a spring, one end of which is connected to the driving member 342 through a third connecting pin 346, and the other end is fixed to the mounting seat 31.

[0075] The welding assembly 34 uses the heat generated by the friction member 341 to heat the first connection portion 911 of the first strapping belt 91 and the second connection portion 921 of the second strapping belt 92 to a molten state on the contact surface, and then fuses them together after cooling. During the welding process, the welding assembly 34 also applies appropriate pressure to the first connection portion 911 and the second connection portion 921 stacked together. This pressure helps the molten material of the strapping belt to mix and solidify to form a strong connection, and can ensure that the thickness at the interface is consistent with the strapping belt itself.

[0076] See also Fig.10 , 11 The limiting and shaping assembly 4 includes a first fixed seat 41 and a second fixed seat 42. The first fixed seat 41 and the second fixed seat 42 are arranged relatively to each other along the second direction and are respectively fixed on one side of the first support plate unit 221 and the second support plate unit 222 along the second direction. The pad 44, the strapping belt limiting mechanism and the shaping mechanism are all installed on the first fixed seat 41 and the second fixed seat 42.

[0077] As an example, the first fixing seat 41 and the second fixing seat 42 are provided with a first fixing groove 411 and a second fixing groove 421 on the opposite surfaces thereof, and the two ends of the pad 44 along the second direction are respectively fixed in the first fixing groove 411 and the second fixing groove 421. A plurality of second friction teeth 441, a third friction tooth 442 and a fourth friction tooth 443 are provided at intervals along the second direction on a side surface of the pad 44 facing the pressing belt and the welding mechanism 3, and the second friction teeth 441, the third friction teeth 442 and the fourth friction teeth 443 are respectively opposite to the head of the first pressing belt member 321, the first friction teeth 341a of the friction member 341 and the head of the second pressing belt member 331.

[0078] As shown in the figure, the strapping belt limiting mechanism as an example includes a slide plate 43, a limiting member 431, a first limiting portion 461a and a second limiting portion 432. The slide plate 43 is located on a side of the pad 44 close to the accommodating cavity 223 and can be slidably mounted on the first fixing seat and the second fixing seat along the first direction. The limiting member 431 is connected to one end of the slide plate 43 along the first direction, and a first limiting step for limiting the width direction of the first connecting portion is formed between the first side surface of the limiting member 431 along the first direction and the end surface of the first end of the slide plate 43, and a second limiting step for limiting the width direction of the second connecting portion is formed between the second side surface of the limiting member 431 along the first direction and the end surface of the first end of the slide plate 43. The first limiting portion 461a is arranged at the first end of the limiting member 431 along the second direction, and a third limiting step for limiting the end of the first connecting portion is formed between the first side surface of the limiting member 431 and the first side surface of the limiting member 431. The second limiting portion 432 is disposed at the second end of the limiting member 431 along the second direction, and forms a fourth limiting step for limiting the end of the second connection portion with the second side surface of the limiting member 431. The first connection portion is limited by the first limiting step and the third limiting step, and the second connection portion is limited by the second limiting step and the fourth limiting step, so that the first connection portion 911 overlaps with the second connection portion 921 in the third direction.

[0079] In one embodiment, the strapping strap limiting mechanism as an example further includes an in-place detection component, which includes a sensing sheet 461, a fourth resetting component 462 and an in-place sensor 463. The sensing sheet 461 is rotatably mounted on the slide plate 43. When the sensing sheet 461 is in the initial position, a first limiting portion 461a is provided at one end of the sensing sheet 461. The first limiting portion 461a and the surface of the limiting member 431 on the first side along the first direction form a limiting step to limit the head end of the first strapping strap. The fourth resetting component 462 is used to reset the sensing sheet 461. The in-place sensor 463 is used to detect the position of the sensing sheet 461. The in-place sensor 463 as an example is a photoelectric sensor. In the initial state, the first limiting portion 461a of the sensing sheet 461 forms a limiting step with the surface of the limiting member 431. When the end of the first strapping belt 91 contacts the first limiting portion 461a of the sensing sheet 461, the sensing sheet 461 is driven to rotate, thereby triggering the in-position sensor 463, which transmits a signal to the control system. When the slide plate 43 moves to the avoidance position, the sensing sheet 461 is reset under the action of the fourth reset component 462.

[0080] As an example, the second limiting portion 432 and the limiting member 431 are an integral structure.

[0081] The strapping belt limiting mechanism of this structure ensures that the first connecting portion 911 of the first strapping belt and the second connecting portion 921 of the second strapping belt 92 can be accurately aligned before welding. This alignment is a prerequisite for achieving high-quality welding, because only when the two ends are correctly aligned, the welded interface will be flat and strong enough.

[0082] The shaping mechanism as an example also includes a knife holder 451, a guide post 454 and a transmission shaft 455. The knife holder 451 is located on the side of the backing plate 44 opposite to the pressing belt and the welding mechanism 3, and can move between an extended position and a retracted position along the third direction. The first cutter 452 and the second cutter are arranged relatively along the second direction, and one end of the first cutter 452 and the second cutter along the third direction is fixed on the knife holder 451, and the other end passes through the through hole on the backing plate 44. The guide post 454 and the transmission shaft 455 both extend along the third direction, and the guide post 454 cooperates with the guide hole on the second fixed seat 42 to guide the movement of the knife holder 451. The transmission shaft 455 cooperates with the shaft hole on the first fixed seat 41, and the other end of the transmission shaft 455 extends out of the shaft hole and is connected to the connecting block 456.

[0083] The shaping mechanism trims and shapes the interface of the strapping tape after welding, ensuring the flatness and neatness of the interface, removing the excess material or protrusions that may be generated during the welding process, and ensuring that the width of the strapping tape after welding is consistent with the original strapping tape. This is very important for the strapping tape to pass smoothly through the head and other guide mechanisms of the strapping machine during subsequent use, avoiding failures caused by inconsistent interface dimensions.

[0084] refer to Figure 1-13 As shown, the first driving device includes a first driving motor 5, a cam assembly 6 and a lever assembly, wherein the first driving motor 5 is fixed on the third support plate 25 and the fourth support plate 26, and the first driving motor 5 is connected to the control system.

[0085] The cam assembly 6 is fixed on the third support plate 25 and the fourth support plate 26. The cam assembly 6 includes a cam main shaft 601, a first cam 604, a second cam 605, a third cam 606, a fourth cam 607, and a fifth cam 608. The cam main shaft 601 extends along the second direction. Both ends of the cam main shaft 601 are supported in the mounting holes of the third support plate 25 and the fourth support plate 26, respectively. One end of the cam main shaft 601 is connected to the output shaft of the first drive motor 5 through a first belt transmission mechanism. The first cam 604, the second cam 605, the third cam 606, the fourth cam 607, and the fifth cam 608 are all installed on the cam main shaft 601 and rotate synchronously with the cam main shaft 601.

[0086] The lever assembly 10 includes a first secondary shaft 602, a second secondary shaft 603, a first connecting rod 609, a second connecting rod 610, a third connecting rod 611, a fourth connecting rod 612, a fifth connecting rod 613, a sixth connecting rod 614 and a seventh connecting rod 615. The two ends of the first secondary shaft 602 and the second secondary shaft 603 are supported in the mounting holes of the third support plate 25 and the fourth support plate 26 respectively. The first connecting rod 609, the second connecting rod 610 and the third connecting rod 611 are all rotatably mounted on the first secondary shaft 602. The first connecting rod 609 is provided with a fourth roller 618 at one end, and the fourth roller 618 contacts the surface of the first cam 604. The other end of the first connecting rod 609 contacts the surface of the first roller 326 of the first belt pressing assembly 32. The second connecting rod 610 is provided with a fifth roller 619 at one end, and the fifth roller 619 contacts the surface of the second cam 605. The other end of the second connecting rod 610 contacts the surface of the third roller 347 of the welding assembly 34. A sixth roller 620 is disposed at one end of the third connecting rod 611 . The sixth roller 620 contacts the surface of the fourth cam 607 . The other end of the third connecting rod 611 contacts the surface of the second roller 336 of the second belt pressing assembly 33 .

[0087] One end of the fourth connecting rod 612 is rotatably mounted on the second secondary shaft 603, the other end of the fourth connecting rod 612 is hinged to one end of the fifth connecting rod 613, and the other end of the fifth connecting rod 613 is connected to the slide plate 43. A seventh roller 621 is provided in the middle of the fifth connecting rod 613, and the surface of the seventh roller 621 contacts the surface of the third cam 606. One end of the fifth reset component 464 is connected to the slide plate 43, and the other end is connected to the fourth connecting rod 612.

[0088] One end of the sixth connecting rod 614 is rotatably mounted on the second secondary shaft 603, the other end of the sixth connecting rod 614 is hinged to one end of the seventh connecting rod 615, and the other end of the seventh connecting rod 615 is connected to the connecting block 456. An eighth roller 622 is provided in the middle of the sixth connecting rod 614, and the surface of the eighth roller 622 contacts the surface of the fifth cam 608.

[0089] The second driving device as an example includes a second driving motor 7 and a crank connecting rod mechanism 8. The second driving motor 7 is fixed on the third support plate 25 and the fourth support plate 26. The second driving motor 7 is connected to the control system. The output shaft of the second driving motor 7 is connected to the friction member 341 through the crank connecting rod mechanism 8. The rotational motion of the second driving motor 7 is converted into the reciprocating motion of the friction member 341 through the crank connecting rod mechanism 8.

[0090] like Fig.14As shown, the crank-connecting rod mechanism 8 includes an eccentric shaft 81 and an eighth connecting rod 82. The eccentric shaft 81 is rotatably mounted on the second fixed seat 42. One end of the eccentric shaft 81 is connected to the output shaft of the second drive motor 7 through a second pulley transmission mechanism. The other end of the eccentric shaft 81 is provided with an eccentric portion, which is connected to one end of the eighth connecting rod 82. The other end of the eighth connecting rod 82 is connected to the friction member 341.

[0091] The end of the first strapping belt 91 is manually inserted from the first strap groove 224 to the stopper 431 , triggering the in-position sensor 463 to rotate the fourth cam 607 , which drives the first strap pressing assembly 32 to lift up and press the end of the first strapping belt 91 through the third connecting rod 611 .

[0092] The head end of the first strapping belt 91 is manually inserted from the second strap groove 225 to the limiter 431, and the first button 13 is pressed to rotate the first cam 604, which drives the second strap pressing assembly 33 to press the head end of the first strapping belt 91 through the first connecting rod 609. At this time, the third cam 606 drives the slide plate 43 to retract, and the mechanism enters the automatic operation state.

[0093] When packing, press the second button 14, and the strapping automatic connection device starts to work. During automatic operation, the second cam 605 rotates to drive the welding assembly 34 to pressurize the first connection part 911 of the first strapping strap 91 and the second connection part 921 of the second strapping strap 92, and the second drive motor 7 drives the friction member 341 through the crank connecting rod mechanism 8 to perform friction welding, so that the final thickness of the welding position is consistent with the thickness of the strapping strap (the thickness of the two straps becomes the thickness of one strap after welding), and the cam assembly 6 continues to rotate to release the pressure of the knife so that the strap can be loosened, and then the fifth cam 608 rotates to drive the first cutter 452 and the second cutter to trim the welding position so that the welding position is the same width as the strapping strap, and all mechanisms return to the origin, and the strapping work is completed.

[0094] The automatic connecting device for strapping straps in the embodiment of the present invention optimizes the continuous supply of strapping straps, realizes the seamless connection of two rolls of strapping straps through automation technology, avoids equipment downtime caused by replacing strapping strap rolls, not only improves operating efficiency, but also ensures the continuous operation of the equipment, significantly improving the productivity and efficiency of the overall packaging operation.

[0095] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

Claims

1. An automatic connecting device for a strapping belt, used to connect a first connecting portion at the end of a first strapping belt and a second connecting portion at the beginning of a second strapping belt, characterized in that: The device comprises: The support frame has a first direction, a second direction and a third direction, the second direction is perpendicular to the first direction, the third direction is perpendicular to the first direction and the second direction, and the support frame is provided with a first belt groove and a second belt groove; The strapping belt limiting mechanism is arranged on the support frame, and includes a first limiting structure and a second limiting structure that can move between a working position and an avoidance position along a first direction. When the first limiting structure and the second limiting structure are in the working position, they are respectively used to limit the first connecting portion of the first strapping belt and the second connecting portion of the second strapping belt, so that the first connecting portion and the second connecting portion overlap each other in the third direction; The strap pressing and welding mechanism is arranged on the supporting frame, and comprises a pad, a first strap pressing assembly, a welding assembly and a second strap pressing assembly, the pad is located on one side of the strapping strap limiting mechanism along the first direction, the first strap pressing assembly, the welding assembly and the second strap pressing assembly are located on the other side of the strapping strap limiting mechanism along the first direction, the first strap pressing assembly and the second strap pressing assembly can move between a pressing position and a releasing position respectively, and cooperate with the pad in the pressing position to fix the end of the first strapping strap and the head end of the second strapping strap respectively; the welding assembly comprises a force applying member and a friction member, the force applying member can move between an extended position and a retracted position along a third direction, the friction member can telescopically move along the third direction with the force applying member, and can reciprocate relative to the force applying member along the first direction, the friction member cooperates with the pad to weld the first connecting portion and the second connecting portion together, and the thickness after welding is substantially consistent with the thickness of the strapping strap; and A shaping mechanism is arranged on the support frame, comprising a first cutter and a second cutter arranged at intervals along the first direction, the first cutter and the second cutter are used to cut off the excess width of the welded part; a first driving device connected to the first limiting structure, the second limiting structure, the first belt pressing assembly, the second belt pressing assembly and the force applying member; and The second driving device is connected to the friction member.

2. The automatic connecting device for strapping belts according to claim 1, characterized in that: The support frame includes a first support plate and a second support plate, the first support plate is parallel to a plane defined by the first direction and the second direction, the second support plate is parallel to a plane defined by the second direction and the third direction, the first end of the second support plate along the third direction is fixed to the first support plate, the second support plate is provided with a accommodating cavity with an opening toward the second end of the second support plate along the third direction, the first belt groove and the second belt groove are respectively located on the second support plate on both sides of the accommodating cavity and close to the second end thereof along the third direction, the pad is arranged opposite to the opening of the accommodating cavity, and the first belt pressing assembly, the welding assembly and the second belt pressing assembly are located in the accommodating cavity.

3. The automatic connecting device for strapping belts according to claim 2, characterized in that: The strapping belt limiting mechanism comprises: A slide plate, the slide plate being capable of sliding along a first direction, and having two ends thereof in a second direction perpendicular to the first direction being respectively fixed to a first fixing seat and a second fixing seat, wherein the first fixing seat and the second fixing seat are mounted on the second supporting plate; A limiting member, wherein the limiting member is connected to a first end of the slide plate along a first direction, a first limiting step for limiting the width direction of the first connecting portion is formed between a first side surface of the limiting member along the first direction and an end surface of the first end of the slide plate, and a second limiting step for limiting the width direction of the second connecting portion is formed between a second side surface of the limiting member along the first direction and an end surface of the first end of the slide plate; A first limiting portion, disposed at a first end of the limiting member along the second direction, and forming a third limiting step between the first side surface of the limiting member for limiting the end of the first connecting portion; and The second limiting portion is arranged at the second end of the limiting member along the second direction, and forms a fourth limiting step between the second limiting portion and the second side surface of the limiting member for limiting the end of the second connecting portion.

4. The automatic strapping device according to claim 3, characterized in that: The strapping strap limiting mechanism also includes an in-place detection component, which includes a sensing sheet, a reset component and an in-place sensor. The sensing sheet is rotatably mounted on the slide, and one end of the sensing sheet is provided with the first limiting portion; the reset component is used to reset the sensing sheet to an initial position, and the in-place sensor is used to detect the position of the sensing sheet.

5. The automatic connecting device for strapping belts according to claim 3, characterized in that: The second limiting portion and the limiting member are an integrated structure.

6. The automatic strapping device according to claim 3, characterized in that: The shaping mechanism also includes a tool holder, which is located on the second side of the pad, is installed on the support frame, and can move between an extended position and a retracted position along a third direction. The first end of the first cutter and the second cutter along the third direction is connected to the tool holder, and the second end is provided with a first blade. The friction member is provided with second blades on both sides along the second direction, and the second blade cooperates with the first blade on the first cutter and the second cutter.

7. The automatic strapping device according to claim 6, characterized in that: The shaping mechanism also includes a guide column and a transmission shaft, both of which extend along a third direction, the guide column cooperates with the guide hole on the second fixed seat, one end of the guide column is connected to the tool holder, the transmission shaft cooperates with the axial hole on the first fixed seat, and one end of the transmission shaft is connected to the tool holder, and the other end extends out of the axial hole and is connected to the connecting block, and the connecting block is connected to the first driving device.

8. The automatic strapping device according to claim 2, characterized in that: The belt pressing and welding mechanism also includes a mounting seat, which is installed in the accommodating cavity. The mounting seat is provided with a mounting cavity, and the first belt pressing assembly, the welding assembly and the second belt pressing assembly are installed in the mounting cavity.

9. The automatic strapping device according to claim 8, characterized in that: The welding assembly also includes a connecting member, which has a first guide block and a second guide block. A first guide groove and a second guide groove extending along the first direction are respectively provided on a side surface of the second end of the friction member along the third direction and the first end of the force-applying member along the third direction, and the first guide block and the second guide block are respectively located in the first guide groove and the second guide groove.

10. The automatic strapping device according to claim 9, characterized in that: The force-applying member includes a driving member, a transmission member and a force-applying spring. The first end of the driving member along the third direction is connected to the friction member, and the second end is inserted into the mounting cavity and is provided with a blind hole. The force-applying spring is installed in the blind hole, and one end of the transmission member along the third direction is inserted into the blind hole.

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