Welding device and method based on tarpaulin

Abstract

The invention provides a novel tarpaulin-based welding device and method.The novel tarpaulin-based welding device comprises a machine body, the top of the machine body is provided with a supporting part with an L-shaped longitudinal section and a long-strip-shaped limiting part, the free end of the supporting part is connected with the limiting part, and the top of the limiting part is higher than the top of the supporting part; first supporting seats are arranged at the two ends of the machine body, supporting columns are horizontally arranged between the first supporting seats and the limiting parts, the outer walls of the supporting columns are rotationally sleeved with feeding rollers, the outer walls of the two feeding rollers are sleeved with feeding belts, and the upper feeding belt part is movably attached to the tops of the supporting parts; the lower feeding belt part movably penetrates through the lower part of the supporting part; the first driving mechanism is used for driving the feeding roller to rotate; the welding head is externally connected with a second driving mechanism used for driving the welding head to ascend and descend, the welding head is used for pressing the tarpaulin wrapped with the rope to the feeding belt located above the supporting part, the rope is located between the welding head and the limiting part, and the turning position of the tarpaulin abuts against the limiting part.

Description

Technical Field

[0001] The present invention belongs to the technical field of tarpaulin welding, and relates to a welding device and method based on tarpaulins. Background Art

[0002] A vehicle awning mainly includes a framework and a tarpaulin located at the top of the framework. Since the framework has a certain size and the tarpaulin is relatively soft, in order to smoothly cover the tarpaulin on the framework, usually a rope is wrapped around one side or several side edges of the tarpaulin. Then when the tarpaulin is towed, since the rope has a certain diameter (such as a diameter of 1 - 1.5 cm), the inner side of the tarpaulin can be clamped by a clamp, and the rope can prevent the tarpaulin from slipping off the clamp. Thus, only the clamp needs to be towed subsequently, and at this time, the rope ensures the clamping stability of the clamp on the tarpaulin.

[0003] When wrapping the rope, first the rope is placed at a position close to the edge of the tarpaulin, then the edge of the tarpaulin is flipped, and the edge of the tarpaulin is made to bypass the rope. Finally, the edge of the tarpaulin is welded to the inner side of the tarpaulin, and at this time the rope is wrapped by the tarpaulin. There are two common methods for tarpaulin welding in the current market. The first is to apply pressure and appropriate high temperature to the tarpaulin through a hot press head, so as to weld the edge of the tarpaulin to the inner side. At this time, the welding head and the rope are in a misaligned state. The second is ultrasonic welding, that is, two layers of tarpaulins are pressed tightly on a workbench by a welding head, and then ultrasonic welding is carried out.

[0004] The tarpaulin has a certain length, but the lengths of the hot press head or the ultrasonic welding head are limited. Therefore, after a section of the tarpaulin is welded, the melted or welded tarpaulin needs to be moved away from below the hot press head or the welding head, and the new tarpaulin wrapped with a rope needs to be moved below the hot press head or the welding head to perform the next hot pressing or welding. Summary of the Invention

[0005] The purpose of the present invention is to provide a new welding device and method based on tarpaulins.

[0006] To achieve the above technical effects, the present invention provides a welding device based on tarpaulins, including:

[0007] A machine body, on the top of the machine body, there is a support part with an L-shaped longitudinal section and a long strip-shaped limiting part. The free end of the support part is connected to the limiting part, and the top of the limiting part is higher than the top of the support part;

[0008] First support base, the first support base is provided at both ends of the body, a support column is horizontally arranged between the first support base and the limiting part, a feeding roller is rotatably sleeved on the outer wall of the support column, a feeding belt is sleeved on the outer walls of the two feeding rollers, the part of the feeding belt located above is movably attached to the top of the support part, and the part of the feeding belt located below movably passes under the support part;

[0009] First driving mechanism, the first driving mechanism is used to drive the feeding roller to rotate;

[0010] Fusion joint, the fusion joint is externally connected with a second driving mechanism for driving the fusion joint to lift and lower, the fusion joint is used to press the tarpaulin wrapped with a rope onto the feeding belt located above the support part, and the rope is located between the fusion joint and the limiting part, and the turning part of the tarpaulin abuts against the limiting part.

[0011] The present invention is further arranged such that a first lifting hole is vertically opened on the limiting part, a first guiding rod is vertically arranged in the first lifting hole, a first lifting part is vertically and movably sleeved on the first guiding rod, both sides of the first lifting part are movably attached to the inner wall of the first lifting hole, and a first elastic part in a continuously compressed state is arranged between the top of the first lifting part and the top of the first lifting hole;

[0012] The free end of the first lifting part is vertically provided with a first folding part, the first folding part is located above the tarpaulin, and the plane where the first folding part is located is parallel to the straight line where the limiting part is located. The upstream end of the first folding part is vertically provided with a second folding part, the plane where the first folding part is located is perpendicular to the plane where the second folding part is located, and both the first folding part and the second folding part have a length at the top greater than that at the bottom, and the free ends of the first folding part and the second folding part are both vertical;

[0013] It further includes a flattening part in a horizontal shape and a guiding part in an inclined shape. The guiding part is triangular. The flattening part is lower than the first folding part and the second folding part, and the projection of the flattening part in the vertical direction is located within the L-shaped opening formed by the projections of the first folding part and the second folding part in the vertical direction. The bottom of the guiding part faces the flattening part. The guiding part is located between the first folding part and the second folding part. The two sides of the guiding part and the first folding part and the second folding part, the bottom of the guiding part and the flattening part, and the edge of the flattening part and the bottom of the first folding part and the second folding part are all in arc transition. The bottom of the flattening part is attached to the top of the folded tarpaulin, and the rope is located between the second folding part and the limiting part.

[0014] The present invention is further configured such that a plurality of second lifting holes are vertically provided on the limiting portion, a second guide rod is vertically provided in the second lifting hole, a second lifting portion is vertically movably sleeved on the second guide rod, both sides of the second lifting portion are movably fitted to the inner wall of the second lifting hole, a second elastic member which is continuously in a compressed state is provided between the top of the second lifting portion and the top of the second lifting hole, a clearance groove for the rope to pass through is provided at the bottom of the second lifting portion, an anti-flip plate is horizontally provided between the bottoms of all the free ends of the second lifting portions, and the anti-flip plate is used to press down the folded tarpaulin;

[0015] The welding joint includes an action part and an integral part located at the side of the action part, an entry groove for the anti-flapping plate and the second lifting part to enter is opened at the bottom of the integral part, and the integral part is located between the action part and the limiting part.

[0016] The present invention is further configured such that the second driving mechanism includes a lifting cylinder body vertically arranged on the machine body, a transmission member is horizontally arranged at the bottom of the piston rod of the lifting cylinder body, a stabilizing rod is vertically arranged at the top of the transmission member, the stabilizing rod moves through the machine body, and the outer wall of the stabilizing rod movesably fits the machine body, and the welding joint is connected to the transmission member.

[0017] The present invention is further configured such that a connecting plate is horizontally arranged on the top of the welding joint, two vertical rods are vertically arranged on the top of the connecting plate, both of the two vertical rods are vertically movable through the transmission member, and the outer walls of the vertical rods are movably fitted to the transmission member, and the side portions of the top ends of the vertical rods are provided with anti-slip portions, and a third elastic member that is continuously in a compressed state is vertically arranged between the top of the connecting plate and the bottom of the transmission member;

[0018] An L-shaped stabilizing arm is arranged on the side of the transmission member, and a stabilizing plate is horizontally arranged on the free end of the stabilizing arm. Before the tarpaulin is welded, the stabilizing plate is higher than the welding head. When the tarpaulin is welded, the stabilizing plate presses the tarpaulin to the feeding belt, and the welding head is located between the limiting portion and the stabilizing plate.

[0019] The present invention is further configured such that a synchronous seat is horizontally arranged on the top of the transmission member, an inverted T-shaped synchronous groove is horizontally opened on the top of the synchronous seat, a through opening communicating with the synchronous groove is opened at one end of the synchronous seat close to the vertical rod, and a through opening is opened vertically through the transmission member;

[0020] A cuboid-shaped synchronization block is horizontally arranged in the synchronization groove. Both sides and the top of the synchronization block are movably attached to the inner wall of the synchronization groove, and the bottom is movably attached to the transmission member. A fourth elastic member in a continuously compressed state is arranged between one end of the synchronization block and the inner wall of the synchronization groove. A drag reduction column is horizontally rotatably arranged at the other end, and the middle part is movably attached to the through opening. A synchronization opening is formed on the side of the vertical rod. The drag reduction column movably abuts against the side wall of the vertical rod or is inserted into the synchronization opening. An unlocking opening is vertically formed through the synchronization block. The unlocking opening includes an inclined unlocking bevel edge. An unlocking rod is vertically arranged on the machine body. The bottom of the unlocking rod is inclined, and the inclination direction of the bottom of the unlocking rod is the same as the inclination direction of the unlocking bevel edge;

[0021] The vertical rod includes a first state, a second state, a third state, a fourth state, a fifth state, and a sixth state;

[0022] When the vertical rod is in the first state, the anti-detachment part abuts against the top of the transmission member, the drag reduction column abuts against the side of the top of the vertical rod, and the welding joint is higher than the tarpaulin;

[0023] When the vertical rod is in the second state, the welding joint abuts against the tarpaulin, the transmission member, the stabilizing arm, and the stabilizing plate all move downward, and the stabilizing plate is higher than the tarpaulin;

[0024] When the vertical rod is in the third state, the stabilizing plate is attached to the tarpaulin, the drag reduction column is inserted into the synchronization opening, and the welding joint welds the tarpaulin;

[0025] When the vertical rod is in the fourth state, the welding joint and the stabilizing plate rise synchronously and at the same speed;

[0026] When the vertical rod is in the fifth state, the bottom of the unlocking rod abuts against the unlocking bevel edge and drives the synchronization block to move away from the vertical rod. The synchronization block and the drag reduction column both disengage from the synchronization opening, and the welding joint moves downward relative to the stabilizing plate;

[0027] When the vertical rod is in the sixth state, the unlocking rod passes through the through opening.

[0028] The present invention is further arranged such that the first driving mechanism includes a driving seat with a C-shaped longitudinal section. The part of the tarpaulin wrapped with the rope is located at the opening of the driving seat. A long horizontal opening is horizontally formed through the limiting part. The bottom of the driving seat is movably located in the horizontal opening, and the driving seat is movably buckled on the top and the inner side of the limiting part. The bottom of the driving seat is horizontally provided with an extension part, and the top of the extension part is attached to the lower side of the feeding belt located above;

[0029] A rotating column is horizontally rotatably arranged on the top of the driving seat. An eccentric pressing wheel is fixedly arranged inside the rotating column, and the center of the eccentric pressing wheel is located downstream of the rotating column. When the driving seat moves downstream, the bottom of the eccentric pressing wheel presses the tarpaulin and the feeding belt against the extending part, and the feeding belt, the tarpaulin and the driving seat remain relatively stationary.

[0030] The present invention is further configured such that a swinging column perpendicular to the rotating column is arranged outside the rotating column, and a linkage part is horizontally arranged outside the free end of the swinging column;

[0031] An L-shaped power arm is arranged on the side of the transmission part. The part of the power arm away from the transmission part is vertical. A long cylindrical first guiding cylinder is vertically arranged on the machine body. The vertical part of the power arm is movably attached to the inner wall of the first guiding cylinder. A long cylindrical second guiding cylinder is also horizontally arranged on the machine body. A first transmission rod is horizontally movably arranged through the second guiding cylinder. The first transmission rod is movably attached to the inner wall of the second guiding cylinder. One end of the first transmission rod is hinged with an inclined second transmission rod, and the bottom end of the second transmission rod is hinged with the bottom of the power arm;

[0032] An anti-disengagement part with a T-shaped longitudinal section is arranged inside one end of the first transmission rod away from the second transmission rod. A long strip-shaped anti-disengagement groove is formed on the outside of the driving seat. The anti-disengagement part is movably attached to the inner wall of the anti-disengagement groove. A linkage arm is vertically arranged on the top of the first transmission rod. A linkage hole is vertically formed in the linkage arm. The linkage part is movably attached to the inner wall of the linkage hole;

[0033] A termination seat is also arranged on the driving seat. The termination seat is in a staggered state with the linkage arm. The termination seat is located between the rotating column and the second guiding cylinder. When the swinging column abuts against the termination seat, the driving seat moves upstream, and both the tarpaulin and the feeding belt are in a stationary state.

[0034] The present invention is further configured such that a one-way groove is formed at the end of the feeding roller. A plurality of one-way teeth are arranged on the inner wall of the one-way groove. A telescopic groove is formed on the outer wall of the support column. A one-way body is movably arranged in the telescopic groove. A fifth elastic member in a continuously compressed state is arranged between the inner end of the one-way body and the inner end of the telescopic groove. The outer end of the one-way body is inclined. When the feeding belt conveys the tarpaulin downstream, the one-way teeth act on the inclined part of the one-way body and can drive the one-way body to move towards the inside of the telescopic groove until the one-way teeth pass over the one-way body. When the driving seat moves upstream, the one-way body abuts against one of the one-way teeth and fixes the angle of the feeding roller;

[0035] A second support base is further provided on the machine body. An auxiliary rod is horizontally arranged between the second support base and the limiting part. An auxiliary roller is rotatably sleeved on the outer wall of the auxiliary rod. The auxiliary roller is in a staggered state with the movement track of the driving seat. The top of the auxiliary roller is at the same height as the top of the feeding roller.

[0036] A receiving plate is further inclined at the downstream end of the machine body. There is a set gap between the top of the receiving plate and the downstream end of the feeding belt. A falling prevention plate is arranged on the top of the bottom end of the receiving plate.

[0037] The present invention also discloses a method for welding using the tarpaulin-based welding device as described in any one of the above, including the following steps:

[0038] S1. The worker manually wraps the edge of the tarpaulin around the outside of the rope and places the starting end of the tarpaulin under the welding head.

[0039] S2. The second driving mechanism drives the welding head to descend until the welding head touches the top of the folded tarpaulin. At this time, the temperature of the welding head rises or ultrasonic vibration is generated, so that the locally pressed tarpaulin is heated and welded to the lower tarpaulin as a whole.

[0040] S3. The second driving mechanism drives the welding head to rise, and the first driving mechanism drives the feeding belt and the feeding roller to move, conveying the tarpaulin downstream until the next section of the tarpaulin to be welded is under the welding head, and repeat S2.

[0041] S4. Repeat S3 until the entire edge of the tarpaulin is wrapped with a rope.

[0042] Compared with the prior art, the present invention provides a tarpaulin-based welding device. When welding the tarpaulin, first, the worker manually wraps the edge of the tarpaulin around the outside of the rope and places the starting end of the tarpaulin under the welding head. Then the second driving mechanism drives the welding head to descend until the welding head touches the top of the folded tarpaulin. At this time, the temperature of the welding head rises (such as electric heating) or ultrasonic vibration is generated (at this time, the welding head is an ultrasonic welding head), so that the locally pressed tarpaulin is heated and welded to the lower tarpaulin as a whole, and the feeding belt can withstand the heat generated during both the electric heating and ultrasonic vibration processes. After that, the second driving mechanism drives the welding head to rise, and the first driving mechanism drives the feeding belt and the feeding roller to move, conveying the tarpaulin downstream until the next section of the tarpaulin to be welded is under the welding head, and repeat the previous welding process until the entire edge of the tarpaulin is wrapped with a rope.

[0043] When the feeding belt conveys the tarpaulin, the feeding belt can support the width of the whole or most of the tarpaulin and prevent the end of the tarpaulin away from the limiting part from pulling down the welded tarpaulin; at the same time, the feeding belt can also normally convey the tarpaulin as a whole downstream to prevent the rope from detaching from the tarpaulin in the part of the tarpaulin wrapped with the rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic structure of the present invention Figure 1 ;

[0045] Figure 2 is Figure 1 an enlarged view of part A in

[0046] Figure 3 is Figure 1 an enlarged view of part B in

[0047] Figure 4 is Figure 1 an enlarged view of part C in

[0048] Figure 5 is Figure 1 an enlarged view of part D in

[0049] Figure 6 is Figure 1 an enlarged view of part E in

[0050] Figure 7 is Figure 6 an enlarged view of part F in

[0051] Figure 8 is a schematic structure of the present invention Figure 2 ;

[0052] Figure 9 is Figure 8 an enlarged view of part G in

[0053] Figure 10 is Figure 9 an enlarged view of part H in

[0054] Figure 11 is Figure 9 an enlarged view of part I in

[0055] Figure 12 is Figure 9 an enlarged view of part J in

[0056] Figure 13 is a cross-sectional view of the driving seat part in the present invention;

[0057] Figure 14 is a cross-sectional view of the first lifting part in the present invention;

[0058] Figure 15 It is a cross-sectional view of the second lifting part in the present invention;

[0059] Figure 16 It is a cross-sectional view of the transmission part in the present invention;

[0060] Figure 17 It is Figure 16 an enlarged view of part K in;

[0061] Figure 18 It is a cross-sectional view of the end part of the feeding roller in the present invention;

[0062] Figure 19 It is a schematic Figure 1 diagram of the first folding part in the present invention;

[0063] Figure 20 It is a schematic Figure 2 diagram of the first folding part in the present invention;

[0064] Figure 21 It is a schematic diagram of the body part in the present invention;

[0065] Figure 22 It is a schematic Figure 1 diagram of the drive seat and the first transmission rod part in the present invention;

[0066] Figure 23 It is a schematic Figure 2 diagram of the drive seat and the first transmission rod part in the present invention;

[0067] Among them, 1, machine body; 2, support part; 3, limit part; 4, first support seat; 5, support column; 6, feed roller; 7, feed belt; 8, welding head; 8a, action part; 8b, integrated part; 9, rope; 10, tarpaulin; 11, first lifting hole; 12, first guide rod; 13, first lifting part; 14, first elastic member; 15, first folding part; 16, second folding part; 17, flattening part; 18, guide part; 19, second lifting hole; 20, second guide rod; 21, second lifting part; 22, second elastic member; 23, make way groove; 24, anti-turnover plate; 25, entry groove; 26, lifting cylinder; 27, transmission member; 28, stabilizing rod; 29, connecting plate; 30, vertical rod; 31, anti-slip part; 32, third elastic member; 33, stabilizing arm; 34. Stabilizing plate; 35. Synchronizing seat; 36. Synchronizing groove; 37. Through-hole; 38. Synchronizing block; 39. Fourth elastic member; 40. Drag reduction column; 41. Synchronizing mouth; 42. Unlocking mouth; 43. Unlocking bevel; 44. Unlocking rod; 45. Driving seat; 46. Horizontal mouth; 47. Extension part; 48. Rotating column; 49. Eccentric clamping wheel; 50. Swinging column; 51. Linkage part; 52. Power arm; 53. First guide cylinder; 54. Second guide cylinder; 55. First transmission rod; 56. Second transmission rod; 57. Anti-slipping member; 58. Anti-slipping groove; 59. Linkage arm; 60. Linkage hole; 61. Termination seat; 62. One-way groove; 63. One-way tooth; 64. One-way body; 65. Fifth elastic member; 66. Second supporting seat; 67. Receiving plate; 68. Anti-drop plate. DETAILED DESCRIPTION

[0068] A tarpaulin-based welding device, such as Figures 1 to 23 As shown, including:

[0069] The body 1 is provided with a support portion 2 having an L-shaped longitudinal section and a long strip-shaped limiting portion 3 at the top thereof (all “disposed” in the present application indicates that there is or exists a connection relationship between two structures, but the specific means by which the two are connected are not limited too much, and are usually conventional connection means, such as welding, gluing, integral molding, riveting, etc., that is, it should be understood that the means are prior art and no excessive elaboration is required) and a free end of the support portion 2 is connected to the limiting portion 3, and the top of the limiting portion 3 is higher than the top of the support portion 2;

[0070] A first support seat 4, both ends of the machine body 1 are provided with the first support seat 4, a support column 5 is horizontally provided between the first support seat 4 and the limiting portion 3, a feed roller 6 is rotatably sleeved on the outer wall of the support column 5, a feed belt 7 is sleeved on the outer walls of the two feed rollers 6, the upper part of the feed belt 7 is movably attached to the top of the support portion 2, and the lower part of the feed belt 7 is movably passed through the lower part of the support portion 2;

[0071] A first driving mechanism for driving the feeding roller 6 to rotate;

[0072] A melting joint 8 is externally connected with a second driving mechanism for driving the melting joint 8 to lift and lower. The melting joint 8 is used to press the tarpaulin 10 wrapped with a rope 9 (wherein the rope 9 and the tarpaulin 10 are not the objects claimed in this application and are introduced here only for auxiliary illustration) onto the feeding belt 7 above the supporting part 2, and the rope 9 is located between the melting joint 8 and the limiting part 3, and the turning part of the tarpaulin 10 abuts against the limiting part 3.

[0073] A first lifting hole 11 is vertically formed in the limiting part 3. A first guiding rod 12 is vertically arranged in the first lifting hole 11. A first lifting part 13 is vertically and movably sleeved on the first guiding rod 12. Both sides of the first lifting part 13 are movably attached to the inner wall of the first lifting hole 11, and a first elastic part 14 in a continuously compressed state is arranged between the top of the first lifting part 13 and the top of the first lifting hole 11;

[0074] A first folding part 15 is vertically arranged at the free end of the first lifting part 13. The first folding part 15 is located above the tarpaulin 10, and the plane where the first folding part 15 is located is parallel to the straight line where the limiting part 3 is located. A second folding part 16 is vertically arranged at the upstream end of the first folding part 15. The plane where the first folding part 15 is located is perpendicular to the plane where the second folding part 16 is located. Both the first folding part 15 and the second folding part 16 have a length at the top greater than that at the bottom, and the free ends of the first folding part 15 and the second folding part 16 are both vertical;

[0075] It further includes a flattening part 17 in a horizontal shape and a guiding part 18 in an inclined shape. The guiding part 18 is triangular. The flattening part 17 is lower than the first folding part 15 and the second folding part 16, and the projection of the flattening part 17 in the vertical direction is located within the L-shaped opening formed by the projections of the first folding part 15 and the second folding part 16 in the vertical direction. The bottom of the guiding part 18 faces the flattening part 17. The guiding part 18 is located between the first folding part 15 and the second folding part 16. The transitions between the two sides of the guiding part 18 and the first folding part 15 and the second folding part 16, between the bottom of the guiding part 18 and the flattening part 17, and between the edge of the flattening part 17 and the bottoms of the first folding part 15 and the second folding part 16 are all arc-shaped. The bottom of the flattening part 17 is attached to the top of the folded tarpaulin 10, and the rope 9 is located between the second folding part 16 and the limiting part 3.

[0076] The limiting part 3 is also vertically provided with a plurality of second lifting holes 19, in which a second guide rod 20 is vertically provided, and a second lifting part 21 is vertically movably sleeved on the second guide rod 20, and both sides of the second lifting part 21 are movably fitted to the inner wall of the second lifting hole 19, and a second elastic member 22 which is continuously in a compressed state is provided between the top of the second lifting part 21 and the top of the second lifting hole 19, and a clearance groove 23 for the rope 9 to pass through is provided at the bottom of the second lifting part 21, and an anti-flip plate 24 is horizontally provided between the bottoms of all the free ends of the second lifting parts 21, and the anti-flip plate 24 is used to press down the folded tarpaulin 10;

[0077] The welding joint 8 includes an action portion 8a and an integral portion 8b located on the side of the action portion 8a. An entry groove 25 for the anti-flapping plate 24 and the second lifting portion 21 to enter is provided at the bottom of the integral portion 8b. The integral portion 8b is located between the action portion 8a and the limiting portion 3.

[0078] The second driving mechanism includes a lifting cylinder 26 vertically arranged on the body 1, a transmission member 27 is horizontally arranged at the bottom of the piston rod of the lifting cylinder 26, a stabilizing rod 28 is vertically arranged on the top of the transmission member 27, the stabilizing rod 28 moves through the body 1, and the outer wall of the stabilizing rod 28 moves and fits the body 1, and the welding head 8 is connected to the transmission member 27.

[0079] A connecting plate 29 is horizontally arranged on the top of the welding joint 8, and two vertical rods 30 are vertically arranged on the top of the connecting plate 29. Both of the vertical rods 30 vertically move through the transmission member 27, and the outer walls of the vertical rods 30 moveably fit the transmission member 27. An anti-slip portion 31 is arranged on the side of the top of the vertical rod 30, and a third elastic member 32 that is continuously in a compressed state is vertically arranged between the top of the connecting plate 29 and the bottom of the transmission member 27.

[0080] An L-shaped stabilizing arm 33 is provided on the side of the transmission member 27, and a stabilizing plate 34 is horizontally provided at the free end of the stabilizing arm 33. Before welding the tarpaulin 10, the stabilizing plate 34 is higher than the welding joint 8. When welding the tarpaulin 10, the stabilizing plate 34 presses the tarpaulin 10 to the feeding belt 7, and the welding joint 8 is located between the limiting portion 3 and the stabilizing plate 34.

[0081] A synchronous seat 35 is horizontally arranged on the top of the transmission member 27, and an inverted T-shaped synchronous groove 36 is horizontally opened on the top of the synchronous seat 35. A through opening communicating with the synchronous groove 36 is opened at one end of the synchronous seat 35 close to the vertical rod 30, and a through opening 37 is opened vertically through the transmission member 27;

[0082] A rectangular parallelepiped synchronizing block 38 is horizontally arranged in the synchronizing groove 36, and both sides and the top of the synchronizing block 38 are movably fitted to the inner wall of the synchronizing groove 36, and the bottom is movably fitted to the transmission member 27. A fourth elastic member 39 that is continuously in a compressed state is arranged between one end of the synchronizing block 38 and the inner wall of the synchronizing groove 36, and a drag reduction column 40 is horizontally rotatably arranged at the other end, and the middle part is movably fitted to the through-port. A synchronizing port 41 is provided on the side of the vertical rod 30, and the drag reduction column 40 movably contacts the side wall of the vertical rod 30 or is inserted into the synchronizing port 41, and an unlocking port 42 is vertically penetrated through the synchronizing block 38, and the unlocking port 42 includes an inclined unlocking bevel 43. An unlocking rod 44 is vertically arranged on the body 1, and the bottom of the unlocking rod 44 is inclined, and the inclination direction of the bottom of the unlocking rod 44 is in the same direction as the inclination direction of the unlocking bevel 43.

[0083] The vertical rod 30 includes a first state, a second state, a third state, a fourth state, a fifth state and a sixth state;

[0084] When the vertical rod 30 is in the first state, the anti-slip portion 31 abuts against the top of the transmission member 27, the drag reduction column 40 abuts against the side of the top of the vertical rod 30, and the welding joint 8 is higher than the tarpaulin 10;

[0085] When the vertical rod 30 is in the second state, the welding joint 8 contacts the tarpaulin 10, the transmission member 27, the stabilizing arm 33 and the stabilizing plate 34 all move downward, and the stabilizing plate 34 is higher than the tarpaulin 10;

[0086] When the vertical rod 30 is in the third state, the stabilizing plate 34 is attached to the tarpaulin 10, the drag reduction column 40 is inserted into the synchronization port 41, and the welding head 8 is welded to the tarpaulin 10;

[0087] When the vertical rod 30 is in the fourth state, the welding head 8 and the stabilizing plate 34 are raised synchronously and at the same speed;

[0088] When the vertical rod 30 is in the fifth state, the bottom of the unlocking rod 44 contacts the unlocking bevel 43, and drives the synchronization block 38 to move in a direction away from the vertical rod 30, the synchronization block 38 and the drag reduction column 40 are both disengaged from the synchronization port 41, and the welding head 8 moves downward relative to the stabilizing plate 34;

[0089] When the vertical rod 30 is in the sixth state, the unlocking rod 44 passes through the through-hole 37 .

[0090] The first driving mechanism includes a driving seat 45 with a C-shaped longitudinal section. The part of the tarpaulin 10 wrapped with the rope 9 is located at the opening of the driving seat 45. A long horizontal opening 46 is horizontally formed through the limiting part 3. The bottom of the driving seat 45 is movably located in the horizontal opening 46, and the driving seat 45 is movably buckled on the top and the inner side of the limiting part 3. A horizontal extension part 47 is arranged at the bottom of the driving seat 45, and the top of the extension part 47 is attached to the lower side of the feeding belt 7 located above.

[0091] A rotating column 48 is horizontally rotatably arranged at the top of the driving seat 45. An eccentric pressing wheel 49 is fixedly arranged inside the rotating column 48 (the eccentric pressing wheel 49 can be elliptical, and then the rotating column 48 is connected to the center of the eccentric pressing wheel 49; or the eccentric pressing wheel 49 is disc-shaped, and the connection part of the rotating column 48 and the eccentric pressing wheel 49 is located at the side of the center of the eccentric pressing wheel 49). The center of the eccentric pressing wheel 49 is located downstream of the rotating column 48. When the driving seat 45 moves downstream, the bottom of the eccentric pressing wheel 49 presses the tarpaulin 10 and the feeding belt 7 onto the extension part 47, and the feeding belt 7, the tarpaulin 10 and the driving seat 45 remain relatively stationary.

[0092] A swinging column 50 perpendicular to the rotating column 48 is arranged outside the rotating column 48, and a linkage part 51 is horizontally arranged outside the free end of the swinging column 50.

[0093] An L-shaped power arm 52 is arranged at the side of the transmission part 27. The part of the power arm 52 away from the transmission part 27 is vertical. A long cylindrical first guiding cylinder 53 is vertically arranged on the machine body 1. The vertical part of the power arm 52 is movably attached to the inner wall of the first guiding cylinder 53. A long cylindrical second guiding cylinder 54 is also horizontally arranged on the machine body 1. A first transmission rod 55 horizontally passes through the second guiding cylinder 54 movably. The first transmission rod 55 is movably attached to the inner wall of the second guiding cylinder 54. One end of the first transmission rod 55 is hinged with an inclined second transmission rod 56, and the bottom end of the second transmission rod 56 is hinged with the bottom of the power arm 52.

[0094] An anti-disengagement part 57 with a T-shaped longitudinal section is arranged inside one end of the first transmission rod 55 away from the second transmission rod 56. A long anti-disengagement groove 58 is formed on the outside of the driving seat 45. The anti-disengagement part 57 is movably attached to the inner wall of the anti-disengagement groove 58. A linkage arm 59 is vertically arranged at the top of the first transmission rod 55. A linkage hole 60 is vertically formed in the linkage arm 59. The linkage part 51 is movably attached to the inner wall of the linkage hole 60.

[0095] A termination seat 61 is further provided on the driving seat 45. The termination seat 61 is misaligned with the linkage arm 59. The termination seat 61 is located between the rotating column 48 and the second guiding cylinder 54. When the swinging column 50 abuts against the termination seat 61, the driving seat 45 moves upstream, and both the tarpaulin 10 and the feeding belt 7 are in a static state.

[0096] A one-way groove 62 is formed at the end of the feeding roller 6. A number of one-way teeth 63 are provided on the inner wall of the one-way groove 62. An expansion slot is formed on the outer wall of the support column 5. A one-way body 64 is movably arranged in the expansion slot. A fifth elastic member 65 in a continuously compressed state is arranged between the inner end of the one-way body 64 and the inner end of the expansion slot. The outer end of the one-way body 64 is inclined. When the feeding belt 7 conveys the tarpaulin 10 downstream, the one-way teeth 63 act on the inclined portion of the one-way body 64 and can drive the one-way body 64 to move towards the inside of the expansion slot until the one-way teeth 63 pass over the one-way body 64. When the driving seat 45 moves upstream, the one-way body 64 abuts against one of the one-way teeth 63 and fixes the angle of the feeding roller 6.

[0097] A second support seat 66 is further provided on the machine body 1. An auxiliary rod is horizontally arranged between the second support seat 66 and the limiting portion 3. An auxiliary roller is rotatably sleeved on the outer wall of the auxiliary rod. The auxiliary roller is misaligned with the movement track of the driving seat 45. The top of the auxiliary roller is at the same height as the top of the feeding roller 6.

[0098] A receiving plate 67 is further inclinedly arranged at the downstream end of the machine body 1. A set gap is provided between the top of the receiving plate 67 and the downstream end of the feeding belt 7. A falling prevention plate 68 is arranged at the top of the bottom end of the receiving plate 67.

[0099] The present invention also discloses a method for welding using the welding device based on the tarpaulin as described in any one of the above, including the following steps:

[0100] S1. The worker manually wraps the edge of the tarpaulin 10 around the outside of the rope 9 and places the starting end of the tarpaulin 10 under the welding head 8.

[0101] S2. The second driving mechanism drives the welding head 8 to move downward until the welding head 8 abuts against the top of the folded tarpaulin 10. At this time, the temperature of the welding head 8 rises or ultrasonic vibration is generated, so that the pressed tarpaulin 10 is locally heated and welded to the tarpaulin 10 below into one body.

[0102] S3. The second driving mechanism drives the welding head 8 to rise, and the first driving mechanism drives the feeding belt 7 and the feeding roller 6 to move to convey the tarpaulin 10 downstream until the next section of the tarpaulin 10 to be welded is located under the welding head 8, and S2 is repeated.

[0103] S4, repeat S3 until the entire edge of the tarpaulin 10 is wrapped with the rope 9.

[0104] The tarpaulin-based welding device provided by the present invention, when welding the tarpaulin 10, firstly, a worker manually wraps the edge of the tarpaulin 10 around the outside of the rope 9, and places the starting end of the tarpaulin 10 below the welding head 8; then the second driving mechanism drives the welding head 8 downward until the welding head 8 hits the top of the folded tarpaulin 10, at which time the temperature of the welding head 8 rises (for example, electric heating, that is, an electric heating wire is pre-buried in the welding head 8 for heating) or ultrasonic vibration is generated (at this time, the welding head 8 is an ultrasonic welding head, and its structure and principle are the same as those of direct welding heads on the market). The ultrasonic welding head is the same as the one purchased, which will not be described in detail here), so that the pressed tarpaulin 10 is locally heated up and welded to the tarpaulin 10 below, wherein the feed belt 7 can withstand the heat generated during both electric heating and ultrasonic vibration; then the second drive mechanism drives the welding head 8 to rise, and the first drive mechanism drives the feed belt 7 and the feed roller 6 to move, transporting the tarpaulin 10 downstream until the next section of the tarpaulin 10 to be welded is located below the welding head 8, and the previous welding process is repeated until the entire edge of the tarpaulin 10 is wrapped with the rope 9.

[0105] When the feed belt 7 is conveying the tarpaulin 10, the feed belt 7 can support the width of the entire or most of the tarpaulin 10, and prevent the end of the tarpaulin 10 away from the limiting portion 3 from pulling the welded tarpaulin 10 downward; at the same time, the feed belt 7 can also normally convey the tarpaulin 10 as a whole downstream to prevent the tarpaulin 10 part wrapped with the rope 9 from being separated from the tarpaulin 10. At the same time, the length of the feed belt 7 (especially the length of the upstream section) is relatively long, and it is preferred that the entire tarpaulin 10 to be welded can be placed on the feed belt 7 (the figure is only for illustration, not for actual structure), so that the tarpaulin 10 can remain relatively still with the feed belt 7, ensuring the position and shape stability of the tarpaulin 10. At the same time, the tarpaulin 10 at this time is preferably small in width, such as 5-10m in length.

[0106] In actual operation, the worker first needs to manually wrap the edge of the tarpaulin 10 with the rope 9, then manually raise the first lifting part 13 and the second lifting part 21, and make the tarpaulin 10 wrapped with the rope 9 be inserted under the flattening part 17 and the anti-turnover plate 24, and at the same time, the folded part of the edge of the tarpaulin 10 needs to be pressed by the flattening part 17 and the anti-turnover plate 24. At this time, the folded part of the tarpaulin 10 contacts the limit part 3, and in the subsequent activity process, the part of the tarpaulin 10 wrapped with the rope 9 is attached to the limit part 3.

[0107] After the tarpaulin 10 is placed properly and the anti - turnover plate 24 and the flattening part 17 are pressed on the top of the tarpaulin 10, the lifting cylinder body 26 (preferably an air cylinder, an oil cylinder, an electric push cylinder or other conventional driving units) lowers the height of the transmission member 27. At this time, the welding joint 8 is lower than the stabilizing plate 34. During the process of the transmission member 27 lowering, the power arm 52 also moves downward. Through the second transmission rod 56, it can drive the first transmission rod 55 to move upstream; at this time, the linkage hole 60 on the linkage arm 59 at the top of the first transmission rod 55 acts on the linkage part 51, thereby driving the rotating column 48 to rotate until the swinging column 50 abuts against the stop seat 61. At this time, the eccentric pressing wheel 49 swings upward, and the distance between it and the extension part 47 is relatively large. In this way, the eccentric pressing wheel 49 and the extension part 47 cannot clamp the tarpaulin 10 and the feeding belt 7. Moreover, due to the existence of the one - way body 64, the feeding roller 6 can only rotate in one direction, and during this process, the feeding roller 6 cannot rotate. In this way, the position stability of the feeding belt 7 is better; and the tarpaulin 10 is laid on the feeding belt 7, so there is a large static friction force between the feeding belt 7 and the tarpaulin 10, which makes the position stability of the tarpaulin 10 very high. Generally speaking, at this time, only the driving seat 45, the extension part 47 and the eccentric pressing wheel 49 are moving upstream, and the tarpaulin 10 and the feeding belt 7 remain stationary.

[0108] After the welding joint 8 descends to a certain height, the acting part 8a of the welding joint 8 presses on the top of the folded part of the tarpaulin 10. And at this time, the second lifting part 21 and the anti - turnover plate 24 both enter the entry groove 25. The size of the entry groove 25 is relatively large, that is, the integral part 8b does not come into contact with the second lifting part 21 and the anti - turnover plate 24. The tarpaulin 10 has a certain elasticity. Therefore, when the tarpaulin 10 is pressed by the anti - turnover plate 24, it can well prevent the tarpaulin 10 from warping up, that is, the anti - turnover plate 24 ensures that the welding can be carried out normally.

[0109] When the welding joint 8 just presses the tarpaulin 10, welding is not carried out yet. At this time, the transmission member 27 continues to descend until the stabilizing plate 34 also presses on the position near the middle of the tarpaulin 10. At this time, the position stability of the tarpaulin 10 between the stabilizing plate 34 and the limiting part 3 is better, that is, during the welding process, the position stability of the tarpaulin 10 can be better guaranteed.

[0110] After the welding joint 8 contacts the tarpaulin 10 and before the stabilizing plate 34 presses the tarpaulin 10, at this time, the vertical rod 30 moves upward relative to the transmission member 27, and the resistance reducing column 40 can reduce the resistance between the synchronization block 38 and the vertical rod 30. When the stabilizing plate 34 presses the tarpaulin 10, the resistance reducing column 40 is exactly opposite to the synchronization port 41. At this time, under the elastic force of the fourth elastic member 39, the synchronization block 38 moves outward, and the end of the synchronization block 38 is inserted into the synchronization port 41. During the welding process, for example, in the case of hot welding, only the temperature of the acting portion 8a rises, but if it is ultrasonic welding, both the acting portion 8a and the integral portion 8b will generate high-frequency vibrations. However, at this time, the welding joint 8 is not in contact with the second lifting portion 21, the anti-turning plate 24, etc., so it does not affect the progress of welding.

[0111] When a section of the tarpaulin 10 is welded, at this time, the lifting cylinder body 26 raises the height of the transmission member 27. At the same time, since the synchronization block 38 is inserted into the synchronization port 41, the welding joint 8 and the stabilizing plate 34 are separated from the tarpaulin 10 almost at the same time. Moreover, during the rising process of the transmission member 27, it simultaneously drives the first transmission rod 55 to move downstream through the power arm 52 and the second transmission rod 56. During the process of the first transmission rod 55 moving downstream, after the inner wall of the linkage hole 60 acts on the linkage portion 51, the rotating column 48 rotates, and at the same time, it drives the eccentric pressing wheel 49 to rotate. Before the linkage portion 51 moves to the highest height, the eccentric pressing wheel 49 presses both the tarpaulin 10 and the feeding belt 7 against the top of the extension portion 47. No matter how the eccentric pressing wheel 49 rotates, its center cannot be located upstream of the rotating column 48, but the center of the eccentric pressing wheel 49 can be very close to directly below the rotating column 48. In this way, during the process of the eccentric pressing wheel 49 moving downstream, the eccentric pressing wheel 49 and the extension portion 47 can apply a relatively large clamping force to the tarpaulin 10 and the feeding belt 7, and drive both the feeding belt 7 and the tarpaulin 10 to move downstream. At this time, the feeding belt 7 drives the feeding roller 6 to rotate. The one-way teeth 63 on the feeding roller 6 can act on the inclined portion of the one-way body 64 and drive the one-way body 64 to move into the telescopic groove until the one-way teeth 63 pass over the one-way body 64; that is, at this time, the feeding roller 6 can rotate normally without affecting the downstream movement of the feeding belt 7 and the tarpaulin 10. It should also be noted that the edge of the tarpaulin 10 that is first clamped by the eccentric pressing wheel 49 is not welded. That is, during the first welding, the edge of the tarpaulin 10 slightly exceeds the downstream end of the welding joint 8 for subsequent driving by the driving seat 45.

[0112] As the transmission member 27 rises, the bottom of the unlocking lever 44 fixed in position touches the unlocking bevel 43 at a certain position. At this time, the unlocking lever 44 can drive the synchronization block 38 (the top of which touches the inner wall of the synchronization port 41) to move towards the outside of the synchronization port 41. Until the unlocking lever 44 is inserted into the through port 37, at this time, both the synchronization block 38 and the drag reduction column 40 are disengaged from the synchronization port 41. At the same time, under the elastic force of the third elastic member 32, the connecting plate 29 and the fusion joint 8 move downward until the anti-disengagement portion 31 touches the top of the transmission member 27. Subsequently, when the transmission member 27 descends again and the unlocking lever 44 is lower than the synchronization block 38, the drag reduction column 40 at this time can also return to touch the side of the top end of the vertical rod 30.

[0113] During the process of the driving seat 45 towing the tarpaulin 10, the folded part of the tarpaulin 10 located upstream will be affected by the second folding part 16, the guiding part 18 and the flattening part 17, and play a role of guiding and pressing on the tarpaulin 10, so that the folded part of the tarpaulin 10 can be stably turned downward and move to fit against the top of the inner tarpaulin 10. Then this folded part of the tarpaulin 10 moves to the anti-flip plate 24, and can also continue to ensure the position of the folded part of the tarpaulin 10, which is convenient for subsequent welding. At the same time, the joints of the first folding part 15, the second folding part 16, the flattening part 17 and the guiding part 18 are all in arc transition, so it can well prevent the tarpaulin 10 from being cut or scratched, ensuring production safety. In actual operation, in order to make the rope 9 better wrapped in the tarpaulin 10, a worker can manually adjust the positions of the tarpaulin 10 and the rope 9 at the flattening part 17, and make the tarpaulin 10 better wrapped on the rope 9. At the same time, during the towing process of the tarpaulin 10, the rope 9 is located between the second folding part 16 and the limiting part 3, and between the anti-flip plate 24 and the limiting part 3. In this way, both the anti-flip plate 24 and the second folding part 16 can play a role in limiting the rope 9 and the tarpaulin 10, and ensure or improve the position and shape stability of the tarpaulin 10. And at the same time, the flattening part 17 is under the downward pressure of the first elastic member 14, and the anti-flip plate 24 is under the downward pressure of the second elastic member 22. In this way, it can not only ensure that the tarpaulin 10 is continuously pressed, but also enable the tarpaulin 10 to move downstream.

[0114] When the tarpaulin 10 is installed on site, the edge of the tarpaulin 10 is clamped by a fixture and then towed. After the tarpaulin 10 covers the skeleton, the tarpaulin 10 is fixedly connected to the skeleton by using a pressing plate, bolts, etc. Finally, the edge of the tarpaulin 10 needs to be cut off. In this way, when actually welding the tarpaulin 10, the folding size of the tarpaulin 10 is not required to be very precise, and it is not necessary to fully weld the edge of the tarpaulin 10. For example, if the edge of the tarpaulin 10 is not welded, it does not affect the actual use; or when welding, all the welded joints can either overlap with each other at the head and tail, or there is a certain distance between the welded joints of different segments.

[0115] During the vertical movement of the power arm 52, it is limited by the long cylindrical first guide cylinder 53, and the first transmission rod 55 is limited by the long cylindrical second guide cylinder 54 during the movement. Therefore, both the power arm 52 and the first transmission rod 55 can move stably. At the same time, the anti-disengagement member 57 at the downstream end of the first transmission rod 55 is movably located in the anti-disengagement groove 58, which enables relative movement between the first transmission rod 55 and the drive seat 45 and enables the eccentric pressing wheel 49 to rotate. When the eccentric pressing wheel 49 clamps the feeding belt 7 and the tarpaulin 10, the anti-disengagement member 57 and the end of the anti-disengagement groove 58 are not in contact. The welded tarpaulin 10 can naturally fall onto the receiving plate 67 and is limited by the end anti-falling plate 68, so as to facilitate the concentration of the tarpaulin 10 after welding.

[0116] In another embodiment, there is a conveyor belt at the upstream end of the feeding belt 7, and the top of the conveyor belt is at the same height as the top of the feeding belt 7, or slightly higher. At the same time, the conveyor belt is also controlled by a motor to move; when it is necessary to convey the tarpaulin 10 forward, the conveyor belt conveys the tarpaulin 10 of a corresponding length forward and enables the tarpaulin 10 to be well transitioned onto the feeding belt 7, so as to prevent relative sliding between the tarpaulin 10 and the feeding belt 7.

Claims

1. A welding device based on tarpaulin, characterized in that: include: A machine body (1), wherein a support portion (2) having an L-shaped longitudinal section and a long strip-shaped limiting portion (3) are arranged on the top of the machine body (1), the free end of the support portion (2) is connected to the limiting portion (3), and the top of the limiting portion (3) is higher than the top of the support portion (2); A first support seat (4), the first support seat (4) is arranged at both ends of the machine body (1), a support column (5) is horizontally arranged between the first support seat (4) and the limiting portion (3), a feed roller (6) is rotatably sleeved on the outer wall of the support column (5), a feed belt (7) is sleeved on the outer walls of the two feed rollers (6), the upper part of the feed belt (7) is movably fitted to the top of the support portion (2), and the lower part of the feed belt (7) is movably passed through the lower part of the support portion (2); A first driving mechanism, the first driving mechanism is used to drive the feeding roller (6) to rotate; A welding joint (8), the welding joint (8) is externally connected to a second driving mechanism for driving the welding joint (8) to be raised and lowered, the welding joint (8) is used to press a tarpaulin (10) wrapped with a rope (9) onto the feeding belt (7) located above the supporting portion (2), and the rope (9) is located between the welding joint (8) and the limiting portion (3), and the turning point of the tarpaulin (10) abuts against the limiting portion (3).

2. The tarpaulin-based welding device according to claim 1, characterized in that: A first lifting hole (11) is vertically provided on the limiting portion (3), a first guide rod (12) is vertically provided in the first lifting hole (11), a first lifting portion (13) is vertically movably sleeved on the first guide rod (12), both sides of the first lifting portion (13) are movably fitted to the inner wall of the first lifting hole (11), and a first elastic member (14) which is continuously in a compressed state is provided between the top of the first lifting portion (13) and the top of the first lifting hole (11); A first folding portion (15) is vertically arranged at the free end of the first lifting portion (13), the first folding portion (15) is located above the tarpaulin (10), and the plane where the first folding portion (15) is located is parallel to the straight line where the limiting portion (3) is located, and a second folding portion (16) is vertically arranged at the upstream end of the first folding portion (15), the plane where the first folding portion (15) is located is perpendicular to the plane where the second folding portion (16) is located, and the length of the top of the first folding portion (15) and the length of the bottom of the second folding portion (16) are both greater than that of the bottom, and the free ends of the first folding portion (15) and the second folding portion (16) are both vertical; The invention also comprises a horizontal flattening portion (17) and an inclined guiding portion (18), wherein the guiding portion (18) is triangular in shape, the flattening portion (17) is lower than the first folding portion (15) and the second folding portion (16), and the projection of the flattening portion (17) in the vertical direction is located in an L-shaped opening formed by the projections of the first folding portion (15) and the second folding portion (16) in the vertical direction, the bottom of the guiding portion (18) faces the flattening portion (17), and the guiding portion (18) is located at the first folding portion (1 5) and the second folding portion (16), between the two sides of the guide portion (18) and the first folding portion (15) and the second folding portion (16), between the bottom of the guide portion (18) and the flattening portion (17), and between the edge of the flattening portion (17) and the bottom of the first folding portion (15) and the second folding portion (16) are all arc-shaped transitions, the bottom of the flattening portion (17) is in contact with the top of the folded tarpaulin (10), and the rope (9) is located between the second folding portion (16) and the limiting portion (3).

3. The tarpaulin-based welding device according to claim 1 or 2, characterized in that: The limiting portion (3) is also vertically provided with a plurality of second lifting holes (19), a second guide rod (20) is vertically arranged in the second lifting hole (19), a second lifting portion (21) is vertically movably sleeved on the second guide rod (20), both sides of the second lifting portion (21) are movably fitted to the inner wall of the second lifting hole (19), and a second elastic member (22) which is continuously in a compressed state is arranged between the top of the second lifting portion (21) and the top of the second lifting hole (19), a clearance groove (23) for the rope (9) to pass through is arranged at the bottom of the second lifting portion (21), and an anti-turnover plate (24) is horizontally arranged between the bottoms of all the free ends of the second lifting portion (21), and the anti-turnover plate (24) is used to press down the folded tarpaulin (10); The welding joint (8) comprises an action portion (8a) and an integral portion (8b) located on the side of the action portion (8a); an entry groove (25) for the anti-flapping plate (24) and the second lifting portion (21) to enter is provided at the bottom of the integral portion (8b); and the integral portion (8b) is located between the action portion (8a) and the limiting portion (3).

4. The tarpaulin-based welding device according to claim 3, characterized in that: The second driving mechanism comprises a lifting cylinder (26) vertically arranged on the machine body (1); a transmission member (27) is horizontally arranged at the bottom of the piston rod of the lifting cylinder (26); a stabilizing rod (28) is vertically arranged at the top of the transmission member (27); the stabilizing rod (28) movably passes through the machine body (1), and the outer wall of the stabilizing rod (28) movably fits the machine body (1); and the welding joint (8) is connected to the transmission member (27).

5. The tarpaulin-based welding device according to claim 4, characterized in that: A connecting plate (29) is horizontally arranged at the top of the welding joint (8), and two vertical rods (30) are vertically arranged at the top of the connecting plate (29). Both of the two vertical rods (30) are vertically movable through the transmission member (27), and the outer walls of the vertical rods (30) are movably fitted to the transmission member (27). An anti-slip portion (31) is arranged on the side of the top of the vertical rod (30), and a third elastic member (32) that is continuously in a compressed state is vertically arranged between the top of the connecting plate (29) and the bottom of the transmission member (27); An L-shaped stabilizing arm (33) is arranged on the side of the transmission member (27), and a stabilizing plate (34) is horizontally arranged at the free end of the stabilizing arm (33). Before the tarpaulin (10) is welded, the stabilizing plate (34) is higher than the welding joint (8). When the tarpaulin (10) is welded, the stabilizing plate (34) presses the tarpaulin (10) onto the feeding belt (7), and the welding joint (8) is located between the limiting portion (3) and the stabilizing plate (34).

6. The tarpaulin-based welding device according to claim 5, characterized in that: A synchronous seat (35) is horizontally arranged on the top of the transmission member (27), and an inverted T-shaped synchronous groove (36) is horizontally opened on the top of the synchronous seat (35); a through opening (37) is opened at one end of the synchronous seat (35) close to the vertical rod (30) and communicated with the synchronous groove (36); and a through opening (37) is opened vertically through the transmission member (27); A rectangular parallelepiped synchronizing block (38) is horizontally arranged in the synchronizing groove (36), both sides and the top of the synchronizing block (38) are movably fitted to the inner wall of the synchronizing groove (36), and the bottom is movably fitted to the transmission member (27), a fourth elastic member (39) which is continuously in a compressed state is arranged between one end of the synchronizing block (38) and the inner wall of the synchronizing groove (36), a drag reduction column (40) is horizontally rotatably arranged at the other end, the middle part is movably fitted to the through opening, and the side opening of the vertical rod (30) is A synchronization port (41) is provided, the drag reduction column (40) movably contacts the side wall of the vertical rod (30) or is inserted into the synchronization port (41), an unlocking port (42) is vertically penetrated through the synchronization block (38), the unlocking port (42) includes an inclined unlocking bevel (43), an unlocking rod (44) is vertically provided on the body (1), the bottom of the unlocking rod (44) is inclined, and the inclination direction of the bottom of the unlocking rod (44) is in the same direction as the inclination direction of the unlocking bevel (43); The vertical rod (30) includes a first state, a second state, a third state, a fourth state, a fifth state and a sixth state; When the vertical rod (30) is in the first state, the anti-slip portion (31) contacts the top of the transmission member (27), the drag reduction column (40) contacts the side of the top of the vertical rod (30), and the welding joint (8) is higher than the tarpaulin (10); When the vertical rod (30) is in the second state, the welding joint (8) contacts the tarpaulin (10), the transmission member (27), the stabilizing arm (33) and the stabilizing plate (34) all move downward, and the stabilizing plate (34) is higher than the tarpaulin (10); When the vertical rod (30) is in the third state, the stabilizing plate (34) is attached to the tarpaulin (10), the drag reduction column (40) is inserted into the synchronization port (41), and the welding head (8) is welded to the tarpaulin (10); When the vertical rod (30) is in the fourth state, the welding head (8) and the stabilizing plate (34) rise synchronously and at the same speed; When the vertical rod (30) is in the fifth state, the bottom of the unlocking rod (44) contacts the unlocking bevel (43), and drives the synchronization block (38) to move in a direction away from the vertical rod (30), the synchronization block (38) and the drag reduction column (40) are both disengaged from the synchronization port (41), and the welding head (8) moves downward relative to the stabilizing plate (34); When the vertical rod (30) is in the sixth state, the unlocking rod (44) passes through the through-hole (37).

7. The tarpaulin-based welding device according to claim 5, characterized in that: The first driving mechanism comprises a driving seat (45) having a C-shaped longitudinal section, a tarpaulin (10) wrapped with a rope (9) is located at the opening of the driving seat (45), a long horizontal opening (46) is provided horizontally through the limiting portion (3), the bottom of the driving seat (45) is movably located in the horizontal opening (46), and the driving seat (45) is movably buckled with the top and inner side of the limiting portion (3), and an extension portion (47) is horizontally provided at the bottom of the driving seat (45), and the top of the extension portion (47) is in contact with the lower side of the feeding belt (7) located above; A rotating column (48) is horizontally rotatably arranged on the top of the driving seat (45), an eccentric pressure wheel (49) is fixedly arranged on the inner side of the rotating column (48), and the center of the eccentric pressure wheel (49) is located downstream of the rotating column (48). When the driving seat (45) moves downstream, the bottom of the eccentric pressure wheel (49) presses the tarpaulin (10) and the feeding belt (7) to the extension portion (47), and the feeding belt (7), the tarpaulin (10) and the driving seat (45) remain relatively still.

8. The tarpaulin-based welding device according to claim 7, characterized in that: A swing column (50) perpendicular to the rotating column (48) is arranged on the outer side of the rotating column (48), and a linkage portion (51) is horizontally arranged on the outer side of the free end of the swing column (50); An L-shaped power arm (52) is arranged on the side of the transmission member (27), and the part of the power arm (52) away from the transmission member (27) is vertically shaped. A long cylindrical first guide cylinder (53) is vertically arranged on the body (1), and the vertical part of the power arm (52) is movably fitted to the inner wall of the first guide cylinder (53). A long cylindrical second guide cylinder (54) is also horizontally arranged on the body (1), and a first transmission rod (55) is arranged horizontally and movably through the second guide cylinder (54), and the first transmission rod (55) is movably fitted to the inner wall of the second guide cylinder (54). One end of the first transmission rod (55) is hingedly provided with an inclined second transmission rod (56), and the bottom end of the second transmission rod (56) is hingedly connected to the bottom of the power arm (52); An anti-slipping piece (57) with a T-shaped longitudinal section is arranged on the inner side of one end of the first transmission rod (55) away from the second transmission rod (56); a long anti-slipping groove (58) is provided on the outer side of the driving seat (45); the anti-slipping piece (57) is movably fitted to the inner wall of the anti-slipping groove (58); a linkage arm (59) is vertically arranged on the top of the first transmission rod (55); a linkage hole (60) is vertically provided on the linkage arm (59); and the linkage part (51) is movably fitted to the inner wall of the linkage hole (60); The driving seat (45) is also provided with a termination seat (61), and the termination seat (61) and the linkage arm (59) are offset, and the termination seat (61) is located between the rotating column (48) and the second guide cylinder (54). When the swing column (50) contacts the termination seat (61), the driving seat (45) moves upstream, and the tarpaulin (10) and the feeding belt (7) are both in a stationary state.

9. The tarpaulin-based welding device according to claim 8, characterized in that: The end of the feed roller (6) is provided with a one-way groove (62), the inner wall of the one-way groove (62) is provided with a plurality of one-way teeth (63), the outer wall of the support column (5) is provided with a telescopic groove, a one-way body (64) is movably provided in the telescopic groove, a fifth elastic member (65) which is continuously in a compressed state is provided between the inner end of the one-way body (64) and the inner end of the telescopic groove, the outer end of the one-way body (64) is inclined, when the feed belt (7) transports the tarpaulin (10) downstream, the one-way teeth (63) act on the inclined part of the one-way body (64), and can drive the one-way body (64) to move toward the telescopic groove until the one-way teeth (63) pass over the one-way body (64), when the drive seat (45) moves upstream, the one-way body (64) contacts one of the one-way teeth (63), and fixes the angle of the feed roller (6); The machine body (1) is also provided with a second support seat (66), an auxiliary rod is horizontally provided between the second support seat (66) and the limiting portion (3), an auxiliary roller is rotatably sleeved on the outer wall of the auxiliary rod, the auxiliary roller is misaligned with the moving track of the driving seat (45), and the top of the auxiliary roller is at the same height as the top of the feeding roller (6); A receiving plate (67) is also obliquely arranged at the downstream end of the machine body (1), a set gap is provided between the top of the receiving plate (67) and the downstream end of the feeding belt (7), and an anti-fall plate (68) is provided at the top of the bottom end of the receiving plate (67).

10. A method for welding using the tarpaulin-based welding device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, a worker manually wraps the edge of the tarpaulin (10) around the outside of the rope (9), and places the starting end of the tarpaulin (10) below the welding joint (8); S2, the second driving mechanism drives the welding head (8) downward until the welding head (8) contacts the top of the folded tarpaulin (10), at which time the temperature of the welding head (8) rises or ultrasonic vibration is generated, so that the pressed tarpaulin (10) is locally heated and welded to the tarpaulin (10) below; S3, the second driving mechanism drives the welding head (8) to rise, and the first driving mechanism drives the feeding belt (7) and the feeding roller (6) to move, and transports the tarpaulin (10) downstream until the next section of the tarpaulin (10) to be welded is located below the welding head (8), and S2 is repeated; S4, repeat S3 until the entire edge of the tarpaulin (10) is wrapped with the rope (9).

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