CN115922050A

CN115922050A - Bed net combination equipment and bed net combination method

Info

Publication number: CN115922050A
Application number: CN202211403607.5A
Authority: CN
Inventors: 梁杰; 盘荣锋; 谭治铭; 谭治良
Original assignee: Guangzhou Lianrou Machinery and Equipment Co Ltd
Current assignee: Guangzhou Lianrou Machinery and Equipment Co Ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-04-07
Anticipated expiration: 2042-11-10
Also published as: CN115922050B

Abstract

The application discloses bed net combination equipment and a bed net combination method, wherein the bed net combination equipment comprises a feeding assembly, a welding cutter assembly and a welding head assembly, the feeding assembly can move in a first direction, the welding cutter assembly and the feeding assembly are arranged oppositely in a second direction, a spring string can be laid on the welding cutter assembly by the feeding assembly, the welding cutter assembly comprises a plurality of welding cutters, the welding cutters extend in a third direction, the number of the welding cutter assemblies is two, the welding cutters in the same group are arranged at intervals in the first direction, the welding cutters in different groups are staggered in the first direction, the welding head assembly and the feeding assembly are located on the same side of the welding cutter assembly in the second direction, the welding head assemblies are arranged at intervals in the first direction, each welding head assembly comprises an ultrasonic welding head and a first driving piece, and the welding head assembly can move in the third direction to avoid the feeding assembly. Bed net equipment can reduce the damaged risk of packing bag among the welding process, improves the production quality of bed net.

Description

Bed net combination equipment and bed net combination method

Technical Field

The application relates to the field of automatic production of mattresses, in particular to bed net combination equipment and a bed net combination method.

Background

The bagged spring bed net is a main component of a bagged spring mattress, and the traditional bagged spring bed net is generally formed by bonding a plurality of spring strings side by side, wherein the spring strings are formed by sequentially connecting a plurality of bagged springs. At present, the bonding of the bagged spring bed net is mainly finished by spraying hot melt adhesive and then extruding and fixing. Besides consuming a large amount of sol, the bonding method also has the problems that the preheating time of the hot melt adhesive is long, the adhesive box is expensive and needs to be cleaned regularly, the station is easily polluted by the overflowing hot melt adhesive, and the like.

The non-rubber bed net disclosed in the prior art welds adjacent spring strings together by ultrasonic welding or hot melt welding, which can avoid the use of hot melt adhesive. At present, the following two common welding processes without a rubber bed net exist:

1) The two spring strings are welded together through a first welding position to form a composite spring string, then the composite spring string is cut into double rows of spring strings corresponding to the size of the bed net, and all the double rows of spring strings are welded together through a second welding position. When the double rows of spring strings are welded, the welding device needs to be stretched between the two rows of spring strings, so that hot-melt welding modes such as electric heating or spot welding are mostly adopted, and the problems of insecure welding points and untight bed nets exist. In addition, the process needs to be provided with two different welding devices, and the steps of cutting, arranging and the like are needed between two times of welding, so that the process is complicated, and the production efficiency is not high.

2) The method comprises the following steps of cutting a spring string into single-row spring strings corresponding to the size of a bed net, sequentially feeding the single-row spring strings to a welding station, changing the position of a welding knife positioned at the welding station back and forth in the length direction of the spring string, inserting one welding position of the spring string for welding, drawing out the spring string, and inserting the spring string into the next welding position for welding. The process adopts an ultrasonic welding mode, but the process of inserting the welding knife into the bed net easily causes the damage of a packaging bag of the bagged spring, and reduces the production quality of the bed net. The single row of spring strings requires manual or semi-automatic feeding, resulting in a reduction in production efficiency.

Disclosure of Invention

The purpose of this application lies in solving one of the technical problem that exists among the prior art at least, and this application provides a bed net combination equipment that production technology is simpler, can improve the production efficiency and the product quality of bed net.

The application also provides a bed net combination method, and the spring strings are combined into the rubber-free bed net through the bed net combination equipment.

According to an embodiment of the first aspect of the present application, there is provided a bed net combining device, including:

the spring string conveying device comprises a feeding assembly, a conveying assembly and a conveying assembly, wherein the feeding assembly can move in a first direction and is used for conveying a spring string, and the spring string comprises a plurality of bagged springs which are connected in sequence;

the spring string can be paved on the welding cutter assembly by the feeding assembly, the welding cutter assembly comprises a plurality of welding cutters, the welding cutters extend in a third direction, the number of the welding cutter assemblies is two, the welding cutters in the same group are arranged at intervals in the first direction, the welding cutters in different groups are staggered in the first direction, the two groups of the welding cutter assemblies are respectively used for corresponding to a first welding position and a second welding position of the spring string, the welding cutter assembly can push the spring string to move in the second direction, and the welding cutter assembly can be close to or far away from the spring string in the third direction; and

the welding head assembly is located on the same side of the welding cutter assembly with the feeding assembly in the second direction, the welding head assembly comprises an ultrasonic welding head and a first driving piece, the ultrasonic welding heads are arranged at intervals in the first direction, the first driving piece is used for driving the ultrasonic welding head to be close to and far away from the welding cutter in the second direction, so that the ultrasonic welding head and the welding cutter can be matched to complete welding, and the welding head assembly can move in the third direction to avoid the feeding assembly.

The bed net combination equipment at least has the following beneficial effects: the method comprises the steps that each row of spring strings are sequentially laid by a feeding assembly, the feeding assembly is avoided by a welding head assembly in a third direction in the laying process, every time one row of spring strings is laid from a second row of spring strings, the laid spring strings and the last row of spring strings are welded together by the welding head assembly and a welding cutter assembly, two groups of welding cutter assemblies correspond to a first welding position and a second welding position of the spring strings respectively, in the welding process, the second group of welding cutter assemblies pushes odd-numbered rows of spring strings to reach a welding station firstly, the first welding position corresponds to a first group of welding cutter assemblies waiting at the welding station, the feeding assembly lays even-numbered rows of spring strings on the odd-numbered rows of spring strings, an ultrasonic welding head presses the first group of welding cutter assemblies to weld the two rows of spring strings, the first group of welding cutter assemblies pushes the even-numbered rows of spring strings to reach the welding station secondly, the second welding position corresponds to a second group of welding cutter assemblies waiting at the welding station, the feeding assembly lays the odd-numbered rows of spring strings on the two rows of spring strings, and the first group of welding cutter assemblies presses the first group of welding cutter assemblies to weld the two rows of spring strings. The material loading subassembly can carry out the material loading automatically, and the bonding tool subassembly welds after one row of spring strings are laid and are accomplished, has improved the production efficiency of bed net, makes first welding position and second welding position correspond two sets of welding cutter subassemblies respectively through the mode that promotes, can reduce the damaged risk of packing bag among the welding process, improves the production quality of bed net.

According to the bed net combination equipment of this application first aspect embodiment, bed net combination equipment includes first track, first track is followed first direction extends, the bonding tool unit mount is in on the first track, the bonding tool unit includes first mount pad, first mount pad with first driving piece with ultrasonic bonding tool one-to-one, it is a plurality of first mount pad is installed at interval on the first track, first driving piece with ultrasonic bonding tool installs on corresponding on the first mount pad, interval between the ultrasonic bonding tool is adjustable, each first driving piece is used for driving respectively the correspondence ultrasonic bonding tool is close to or keeps away from the welding sword.

According to the bed net combined equipment of this application first aspect embodiment, the bonding tool subassembly includes first mount pad, and is a plurality of ultrasonic bonding tool installs along first direction interval on the first mount pad, interval between the ultrasonic bonding tool is adjustable, first driving piece is used for driving a plurality of ultrasonic bonding tool is close to or keeps away from the welding sword.

According to the bed net combined equipment of this application first aspect embodiment, bed net combined equipment includes seventh driving piece, fifth track and fifth mount pad, the fifth track extends along the third direction, the fifth mount pad is installed on the fifth track, the seventh driving piece can drive the fifth mount pad along the fifth track removes, the bonding tool subassembly is movably installed on the fifth mount pad.

According to the bed-net combined device, the bed-net combined device comprises a fourth driving part, and the fourth driving part is used for driving the welding head assembly to move along the first direction, so that the ultrasonic welding head can complete welding at different positions.

The bed net assembling device according to the embodiment of the first aspect of the present application, the feeding assembly includes a sixth driving element and conveying elements, the conveying elements are arranged at intervals in the first direction or the third direction in pairs, a feeding channel is formed between the conveying elements in pairs, at least one of the conveying elements is an active element, the active element includes at least one of a ratchet, a roller and a conveyer belt, and the sixth driving element is used for driving the active element to convey the spring string.

According to the bed net combined equipment of this application first aspect embodiment, the material loading subassembly includes the locating part, the locating part is in the second direction extends, the locating part with carry the piece and form jointly pay-off passageway.

According to the bed net combined equipment of this application first aspect embodiment, bed net combined equipment includes second driving piece and third driving piece, the second driving piece is used for driving the welding cutter subassembly and moves along the second direction, the third driving piece is used for driving the welding cutter subassembly and moves along the third direction.

According to the bed net combination equipment, the distance between the welding knives is adjustable.

The bed net assembly device according to the embodiment of the first aspect of the present application comprises a support member, the support member and the welding knife assembly are arranged at an interval in the third direction, and the support member is used for supporting one end of the welding knife far away from the fourth mounting seat.

The bed net combined equipment according to this application first aspect embodiment, the welding cutter subassembly includes the fourth mount pad, install the one end of welding cutter on the fourth mount pad, bed net combined equipment includes support piece, support piece is located the opposite side of the face of weld of welding cutter, support piece is used for supporting the other end of welding cutter.

According to the bed net combined equipment of the embodiment of the first aspect of the application, the welding knife forms a convex surface facing the ultrasonic welding head, and the convex surface is used for enabling the welding knife to be better attached to the ultrasonic welding head after being stressed and deformed.

According to the bed net combination equipment of this application first aspect embodiment, bed net combination equipment includes the unloading subassembly, the unloading subassembly is including accepting the piece, accept the piece and be located in the second direction the opposite side of the face of weld of welding cutter, accept the piece and be used for receiving the spring cluster that the welding cutter subassembly sent out.

According to the bed net combined equipment of this application first aspect embodiment, bed net combined equipment still includes the guide, the guide sets up on welding cutter subassembly or the unloading subassembly, the guide includes the direction inclined plane, the direction inclined plane slope in the terminal surface of the spring cluster spring of bagging with bags, the guide is used for making the spring cluster arrange neatly in the first direction and guide the spring cluster to the motion of second direction.

According to this application first aspect embodiment bed net combination equipment, the unloading subassembly includes two sets ofly the receiving element, bed net combination equipment includes two sets ofly the guiding element, it is two sets ofly the receiving element is in third direction interval arrangement, it is two sets of form between the receiving element and connect the material passageway, it is two sets of the guiding element is in third direction relative arrangement, the direction inclined plane is in the third direction is partly or wholly located welding surface one side of welding cutter, it is two sets of the guiding element forms the direction passageway that the sectional area reduces gradually, the guiding element is used for guiding the spring cluster gets into connect the material passageway.

According to the bed net combined equipment of the embodiment of the first aspect of the application, the two groups of the welding cutter assemblies are respectively positioned on two sides of the blanking assembly in the third direction, or the two groups of the welding cutter assemblies are positioned on the same side of the blanking assembly in the third direction.

According to an embodiment of the second aspect of the present application, there is provided a bed net combining method for combining spring strings into a rubber-free bed net by the bed net combining device, the bed net combining method comprising the following steps:

step 100: the feeding assembly moves along a first direction, and a first row of spring strings are laid on a first group of welding knives;

step 200: the second group of welding knives moves to one side of the spring strings in the odd rows close to the feeding assembly and then moves along the second direction to drive the spring strings in the odd rows to reach a welding station;

step 300: the feeding assembly moves along the first direction, and the spring strings in even rows are laid on the spring strings in odd rows;

step 400: the welding head assembly moves to a position corresponding to a first group of the welding knives in the first direction, the ultrasonic welding head presses towards the first group of the welding knives in the second direction, and the ultrasonic welding head and the first group of the welding knives weld the spring strings in the even number rows and the spring strings in the odd number rows at first welding positions;

step 500: a first set of said welding knives is withdrawn from said string of springs;

step 600: the first group of welding knives moves to one side of the spring strings in the even rows close to the feeding assembly and then moves along the second direction to drive the spring strings in the even rows to reach a welding station;

step 700: the feeding assembly moves along the first direction, and the spring strings in odd rows are laid on the spring strings in even rows;

step 800: the welding head assembly moves in the first direction to a position corresponding to a second group of the welding knives, the ultrasonic welding head presses towards the second group of the welding knives in the second direction, and the ultrasonic welding head and the second group of the welding knives weld second welding positions of the spring strings in odd rows and the spring strings in even rows;

step 900: a second set of said welding knives is withdrawn from said string of springs;

repeating steps 200-900 until the spring string is welded into a predetermined size of bed net.

The bed net combination method uses the bed net combination equipment. Therefore, the bed net combining method in the embodiment of the application has the beneficial effects brought by the bed net combining equipment, and details are not repeated herein.

The bed net combining method according to the embodiment of the second aspect of the present application, before the step 100, further comprises the step 10: adjusting the first group of welding knives to enable the first group of welding knives to correspond to a first welding position of the spring string in the first direction; and adjusting a second group of welding knives to enable the second group of welding knives to correspond to a second welding position of the spring string in the first direction, wherein in the welding step, the position of the welding knives in the first direction is fixed.

According to the bed net combining method, before the welding head assembly moves in the first direction, the welding head assembly moves to a working area along a third direction, and after welding is completed, the welding head assembly moves to an avoidance area along the third direction.

According to the bed net combining method of the embodiment of the second aspect of the present application, when the number of the ultrasonic welding heads is less than that of the first set of the welding knives, step 400 is repeatedly executed to complete the welding of all the first welding positions, and when the number of the ultrasonic welding heads is less than that of the second set of the welding knives, step 800 is repeatedly executed to complete the welding of all the second welding positions.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples;

FIG. 1 is a schematic structural diagram of a bed net assembly apparatus according to an embodiment of the present application;

fig. 2 is a schematic view of a bed net combining method performed by the bed net combining apparatus according to the embodiment of the present application;

FIG. 3 is a schematic view of a portion of the bed net assembly apparatus of the embodiment of FIG. 1, in which the components of the welding knife assembly are embodied;

fig. 4 is a schematic top view of a portion of the bed net assembly apparatus of the embodiment of fig. 1, in which the positional relationship of the welding head assembly, the blanking assembly and the support is embodied;

fig. 5 is a schematic view of the movement of the bed wire assembly apparatus of the embodiment of fig. 1 when performing the bed wire assembly method, wherein the bed wire assembly apparatus performs step 200 of the bed wire assembly method;

fig. 6 is a schematic diagram of the movement of the bed net assembling apparatus of the embodiment of fig. 1 when the bed net assembling apparatus performs the bed net assembling method of step 200;

fig. 7 is a schematic view of the movement of the bed wire assembly apparatus of the embodiment of fig. 1 when performing the bed wire assembly method, wherein the bed wire assembly apparatus performs step 300 of the bed wire assembly method;

fig. 8 is a schematic movement diagram of the bed net assembling apparatus of the embodiment of fig. 1 when performing the bed net assembling method, wherein the bed net assembling apparatus performs step 400 of the bed net assembling method;

fig. 9 is a schematic movement diagram of the bed net assembling apparatus of the embodiment of fig. 1 when performing the bed net assembling method, wherein the bed net assembling apparatus performs step 500 of the bed net assembling method;

fig. 10 is a schematic movement diagram of the bed net assembling apparatus of the embodiment of fig. 1 when performing the bed net assembling method, wherein the bed net assembling apparatus performs step 600 of the bed net assembling method;

fig. 11 is a schematic movement diagram of the bed net assembling apparatus of the embodiment of fig. 1 when performing the bed net assembling method, wherein the bed net assembling apparatus performs step 600 of the bed net assembling method;

fig. 12 is a schematic view of the movement of the bed wire assembly apparatus of the embodiment of fig. 1 when performing the bed wire assembly method, wherein the bed wire assembly apparatus performs step 700 of the bed wire assembly method;

fig. 13 is a schematic view of the movement of the bed wire assembly apparatus of the embodiment of fig. 1 when performing the bed wire assembly method, wherein the bed wire assembly apparatus performs step 800 of the bed wire assembly method;

FIG. 14 is a schematic view of the structure of a bed net assembly according to another embodiment of the present application;

FIG. 15 is a schematic view of a portion of the bed net assembly apparatus of the embodiment of FIG. 14, in which the components of the welding blade assembly are embodied;

fig. 16 is a partial structural schematic view of a bed net assembly apparatus according to still another embodiment of the present application, in which the constitution of a horn assembly is embodied;

fig. 17 is a schematic view of a bed net welded by a bed net combining method performed by the bed net combining apparatus according to the embodiment of the present application.

Reference numerals:

a feeding component 100, a conveying component 110, a limiting component 120,

A horn assembly 200, an ultrasonic horn 210, a first drive member 220 a first mounting base 230, a connecting rod 240,

Welding blade assembly 300, welding blade 310, first welding blade 311, second welding blade 312, fourth mounting base 320, fourth rail 330,

A blanking component 400, a bearing piece 410,

A frame 510, a first rail 520, a fifth rail 530, a fifth mounting seat 540, a second rail 550, a second mounting seat 560 a third mounting seat 570, a third rail 580, a second driving member 590, a supporting member 610, a guiding member 620, a sixth rail 630,

Spring string 900, first weld location 910, second weld location 920.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present application. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

Referring to fig. 1, an embodiment of the present application provides a bed net assembly apparatus including a feeding assembly 100, a welding knife assembly 300, and a welding head assembly 200.

The feeding assembly 100 is capable of moving in a first direction (which is embodied as a left-right direction in fig. 1), the feeding assembly 100 is used for conveying a spring string 900, and the spring string 900 includes a plurality of pocketed springs connected in sequence.

The welding knife assemblies 300 and the feeding assembly 100 are oppositely arranged in a second direction (embodied as a front-back direction in fig. 1), the feeding assembly 100 can lay the spring string 900 on the welding knife assemblies 300, each welding knife assembly 300 comprises a plurality of welding knives 310, the welding knives 310 extend in the third direction (embodied as an up-down direction in fig. 1), the number of the welding knife assemblies 300 is two, the welding knives 310 in the same group are arranged at intervals in the first direction, the welding knives 310 in different groups are staggered with each other in the first direction, the two groups of welding knife assemblies 300 are respectively used for corresponding to a first welding position 910 and a second welding position 920 of the spring string 900, the welding knife assemblies 300 can push the spring string 900 to move in the second direction, and the welding knife assemblies 300 can be close to or far away from the spring string 900 in the third direction.

The welding head assembly 200 is located on the same side of the welding knife assembly 300 as the feeding assembly 100 in the second direction, the welding head assembly 200 comprises an ultrasonic welding head 210 and a first driving member 220, the plurality of ultrasonic welding heads 210 are arranged at intervals in the first direction, the first driving member 220 is used for driving the ultrasonic welding head 210 to be close to and far away from the welding knife 310 in the second direction, so that the ultrasonic welding head 210 and the welding knife 310 can be matched to complete welding, and the welding head assembly 200 can move in a third direction to avoid the feeding assembly 100.

With further reference to fig. 2 and 17, in fig. 2 and 17 the individual welding positions in each row of spring strings 900 are identified by means of numbered indicator lines, and fig. 17 also identifies the order of laying of the individual spring strings 900 in the bed wire by means of arrow-marked indicator lines. As shown in fig. 2 and 17, in the row of spring strings 900, the welding positions may be further divided into a first welding position 910 (i.e., the welding position indicated by the even numbered indicator line) and a second welding position 920 (i.e., the welding position indicated by the odd numbered indicator line), the first welding position 910 and the second welding position 920 alternate with each other, the first row of spring strings 900 and the second row of spring strings 900 are welded together by the first welding position 910, and the second row of spring strings 900 and the third row of spring strings 900 are welded together by the second welding position 920.

In the present application, each row of spring strings 900 is laid in sequence by the feeding assembly 100, in the laying process, the welding head assembly 200 avoids the feeding assembly 100 in the third direction, and from the second row of spring strings 900, each time one row of spring strings 900 is laid, the welding head assembly 200 and the welding cutter assembly 300 weld the laid spring strings 900 and the previous row of spring strings together. The two sets of welding knife assemblies 300 correspond to the first welding position 910 and the second welding position 920 of the spring string 900 respectively, in the welding process, firstly, the welding knife 310 (hereinafter, defined as the first welding knife 311) of the first set of welding knife assembly 300 corresponds to the first welding position 910, the feeding assembly 100 lays the spring string 900 in even rows on the spring string 900 in odd rows, the ultrasonic welding head 210 presses the welding position, and the ultrasonic welding head 210 and the first welding knife 311 clamp and weld the first welding position 910 of the two rows of spring strings 900 together. Next, the welding blade 310 (hereinafter, defined as the second welding blade 312) of the second set of welding blade assemblies 300 corresponds to the second welding position 920, the feeding assembly 100 lays the odd rows of spring strings 900 on the even rows of spring strings 900, the ultrasonic horn 210 presses against the welding station, and the ultrasonic horn 210 and the second welding blade 312 clamp and weld the second welding positions 920 of the two rows of spring strings 900 together. On one hand, the feeding assembly 100 can continuously lay a row of spring strings 900, the welding head assembly 200 can weld after the row of spring strings 900 is laid, and on the other hand, the two groups of welding knife assemblies 300 are alternately matched with the ultrasonic welding head 210 to complete welding, so that the production efficiency of the non-rubber-bed net can be improved.

It is to be understood that in the present application, the "welding station" refers to the area where the ultrasonic horn 210 and the welding blade 310 weld the spring string 900. One set of welding blade assemblies 300 participating in welding waits at the welding station, and the other set of welding blade assemblies 300 pushes the newly laid spring string 900 in the second direction to reach the welding station, and simultaneously pushes the welded spring string 900 out of the welding station, and then the ultrasonic welding head 210 presses the welding blade 310 participating in welding again for welding. This application makes first welding position 910 and second welding position 920 correspond two sets of welding cutter subassembly 300 respectively through the mode that promotes, is responsible for promoting the welding cutter subassembly 300 of spring cluster 900 and the welding cutter subassembly 300 of waiting at the welding station through the switching and realizes the welding to different welding positions, compares in prior art and realizes the welding to different welding positions through plug welding cutter 310 repeatedly, and the wrapping bag of spring in bags is more difficult impaired to can improve the production quality of bed net.

In some possible embodiments, the first driving member 220 may drive the ultrasonic horn 210 to move by using an air cylinder, a hydraulic cylinder, or a motor. The first driving member 220 can be connected to the ultrasonic horn 210 in different ways, for example, in the embodiment of fig. 1, the output end of the first driving member 220 can move in the second direction, and the ultrasonic horn 210 is fixedly connected to the output end, while in the embodiment of fig. 16, the output end of the first driving member 220 can rotate, the ultrasonic horn 210 is connected to the output end through a connecting rod 240, and both ends of the connecting rod 240 are hinged to the ultrasonic horn 210 and the output end, respectively. The first driving members 220 may correspond to the ultrasonic horns 210 one by one, or all the ultrasonic horns 210 may be driven to move synchronously by a group of the first driving members 220.

In order to increase the applicability of the bed net assembly, in some possible embodiments, the spacing between the ultrasonic horns 210 may be adjustable, thereby adjusting the position of the ultrasonic horns 210 according to the specifications of the spring string 900. For example, the bed net assembly apparatus includes a first rail 520, the first rail 520 extends along a first direction, and the horn assembly 200 is mounted on the first rail 520, such that the ultrasonic horn 210 can adjust a position in the first direction, and the ultrasonic horn 210 is locked by a fastener such as a screw after the position is adjusted.

Specifically, referring to fig. 1 and 16, the horn assembly 200 may include first mounts 230, the first mounts 230 and the first driving members 220 correspond to the ultrasonic horns 210 one by one, a plurality of the first mounts 230 are mounted on the first rail 520 at intervals, the ultrasonic horns 210 and the first driving members 220 are mounted on the corresponding first mounts 230, and each of the first driving members 220 is used for driving the corresponding ultrasonic horn 210 to approach or move away from the welding knife 310.

Or in some other embodiments, a plurality of ultrasonic horns 210 are mounted on first mount 230 at intervals in a first direction, and the mounting position of ultrasonic horns 210 on first mount 230 is adjustable in the first direction, so that the spacing between ultrasonic horns 210 is adjustable. The first drive member 220 is used to drive the plurality of ultrasonic horn 210 toward or away from the welding blade 310.

In some possible embodiments, the bed net assembly apparatus includes a seventh driving member for driving the welding head assembly 200 to move in the third direction, so that the welding head assembly 200 can avoid the feeding assembly 100. Referring to fig. 1, in some possible embodiments, the bed net assembly further includes a fifth rail 530 and a fifth mount 540, the fifth rail 530 extends in the third direction, the fifth mount 540 is mounted on the fifth rail 530, the seventh driving member is capable of driving the fifth mount 540 to move along the fifth rail 530, and the welding head assembly 200 is mounted on the fifth mount 540. The horn assembly 200 is moved along the fifth track 530 to effect the avoidance of the loader assembly 100 in the third direction. With continued reference to the embodiment of fig. 1, first rail 520 is mounted to fifth mount 540 such that horn assembly 200 is indirectly mounted to fifth mount 540. Horn assembly 200 slides along first track 520 and thus moves relative to fifth mount 540.

It is to be understood that the area in which the horn assembly 200 is positioned to avoid the loader assembly 100 may be defined as an avoidance area, which is offset from the loader assembly 100 in the third direction, and the area in which the horn assembly 200 is welded may be defined as a working area, which interferes with the movement area of the loader assembly 100 in the third direction. The welding head assembly 200 is not limited to moving to avoid the feeding assembly 100, and in other possible embodiments, the welding head assembly 200 may also be rotated to avoid, and both moving and rotating can displace the welding head assembly 200 in a third direction to achieve an avoiding effect. For example, the bed net assembly apparatus may arrange rotating shafts corresponding to the number of the horn assemblies 200, and the horn assemblies 200 are mounted on the rotating shafts, and the rotating shafts rotate the horn assemblies 200 in the third direction to avoid the feeding assembly 100.

In some possible embodiments, the bed-web assembly includes a fourth drive for driving the horn assembly 200 to move in the first direction to enable the ultrasonic horn 210 to perform welds in different positions. This can reduce the total number of horn assemblies 200, thereby reducing costs. Referring to fig. 2, in some possible embodiments, the number of the welding knives 310 of two sets of welding knife assemblies 300 is different, the number of the welding head assemblies 200 corresponds to the number of the larger set of welding knives 310, and the welding head assemblies 200 can correspond to different sets of welding knife assemblies 300 through switching positions on one hand, and can complete welding of one row of spring strings 900 at a time by matching with the welding knife assemblies 300 on the other hand, which takes cost and efficiency into consideration. In addition, the position of the welding head assembly 200 can be switched in parallel with the action of the spring string 900 laid by the feeding assembly 100, so that the influence on the production efficiency is further reduced.

Of course, if the size of the bed net is too large, the number of welding heads 310 in one set of welding knife assemblies 300 is too large, and the cost for completing the welding of one row of spring strings 900 at one time may be too high, and at this time, the number of welding head assemblies 200 may be reduced, and the welding of one row of spring strings 900 may be completed in multiple times.

Next, the loading assembly 100 will be explained. In some possible embodiments, the feeding assembly 100 includes conveying members 110, the conveying members 110 are spaced in pairs in the first direction or the third direction, and the conveying members 110 in the pairs form a feeding channel therebetween. The feeding channel can limit the feeding route of the spring string 900 and avoid the spring string 900 interfering with other structures of the bed net combined equipment.

In some possible embodiments, at least one of the conveying elements 110 is an active element, and the sixth driving element is used to drive the active element 110 to convey the spring string 900. Specifically, the driving part may include at least one of a ratchet wheel, a roller and a conveyor belt, and the sixth driving part is in transmission connection with the driving part to drive the driving part to operate. For example, referring to fig. 2, the conveying members 110 on both sides are driving members, the driving members use ratchet wheels, grooves corresponding to the shape of the pocket springs are formed between the ratchet teeth of the ratchet wheels, and the grooves continuously shift the spring string 900 along with the rotation of the ratchet wheels, so as to send out the spring string 900. As shown in the embodiment of fig. 2, the feeding assembly 100 may include a plurality of ratchets, which may be driven by a belt, chain, or other transmission means to rotate synchronously.

In some possible embodiments, the feeding assembly 100 further includes a stopper 120, and the stopper 120 is used for forming a feeding channel. For example, referring to fig. 1, the limiting member 120 uses a baffle plate extending in the second direction, the ratchet wheel is located behind the baffle plate, and the ratchet wheel and the baffle plate together form a feeding channel.

It is understood that the feeding assembly 100 does not necessarily include the limiting member 120, for example, when the two conveying members 110 in the pair are both active members, and the active members use a conveying belt, the conveying belt can perform the same limiting function as the limiting member 120 while performing the conveying function. In the case of using a conveyor belt as the conveying member 110, in order to increase a contact area between the conveyor belt and the spring string 900, two conveying members 110 in a pair may be set to be spaced apart in the third direction.

In addition, the feeding assembly 100 may be driven to move in the first direction by a fifth driving member. In some possible embodiments, referring to fig. 1, the bed net assembly includes a sixth rail 630, the sixth rail 630 extends along the first direction, the feeding assembly 100 is mounted on the sixth rail 630, and the fifth driving member drives the feeding assembly 100 to move along the sixth rail 630.

Next, the material module will be explained. It will be appreciated that in the present application, after the laying of a row of spring strings 900 is complete, one of the sets of welding knives 310 will move to the side of the spring string 900 adjacent the loading assembly 100, pushing the spring string 900 toward the welding station to allow the loading assembly 100 to lay a new row of spring strings 900. At the welding station, the welding position of the spring string 900 will correspond to the other set of welding knives 310. The correspondence of knife 310 to the welding position of spring string 900 means that knife 310 is close enough to the welding position of spring string 900 to allow ultrasonic horn 210 and knife 310 to clamp the welding position of spring string 900 for ultrasonic welding.

For example, after the first row of spring strings 900 is laid, the second welding knife 312 moves from the welding station to the side of the first row of spring strings 900 far away from the first welding knife 311, the first row of spring strings 900 is pressed towards the welding station, the first welding position 910 corresponds to the first welding knife 311, then the second row of spring strings 900 is laid, the ultrasonic welding head 210 and the first welding knife 311 clamp the first welding position 910 of the first row of spring strings 900 and the second row of spring strings 900, and the first welding positions 910 of the two rows of spring strings 900 are welded together; after welding, the first welding knife 311 moves from the welding station to the side of the second row of spring strings 900 far away from the second welding knife 312, the second row of spring strings 900 is pressed to the welding station, the second welding position 920 corresponds to the second welding knife 312, then the third row of spring strings 900 is laid, the ultrasonic welding head 210 and the second welding knife 312 clamp the second welding positions 920 of the second row of spring strings 900 and the third row of spring strings 900, and the second welding positions 920 of the two rows of spring strings 900 are welded together. The first welding blade 311 and the second welding blade 312 are alternately moved, thereby achieving a cycle of the welding process.

To effect movement of the welding blade 310, in some possible embodiments, the welding blade assembly 300 includes a second drive 590 for driving the welding blade 310 to move in the second direction and a third drive 590 for driving the welding blade 310 to move in the third direction. For example, first, the third driving member draws the first welding blade 311 out of the bed net; then the second driving element 590 makes the first welding blade 311 reach the side of the even-numbered row of spring strings 900 which is just laid and is far away from the second welding blade 312, and the third driving element makes the first welding blade 311 reset; finally, the second driving member 590 causes the first welding blade 311 to press the spring string 900 of even rows toward the second welding blade 312, thereby completing one movement of the first welding blade 311.

In some possible embodiments, the bed net assembly includes a second rail 550, a second mount 560, a third rail 580, and a third mount 570. For example, referring to fig. 1, the bed net assembly further includes a frame 510, a second rail 550 and a second driving member 590 (not shown) are mounted on the frame 510, the second rail 550 extends along the second direction, a second mounting seat 560 is mounted on the second rail 550, the second driving member 590 is used for driving the second mounting seat 560 to move along the second rail 550, a third rail 580 extends along the third direction, a third rail 580 is mounted on the second mounting seat 560, a third mounting seat 570 is mounted on the third rail 580, a third driving member (not shown) is used for driving the third mounting seat 570 to move along the third rail 580, and the welding blade assembly 300 is mounted on the third mounting seat 570. It will be appreciated that the number of second drive 590 and third drive is now two, thereby corresponding to two sets of welding blade assemblies 300, respectively.

In other possible embodiments, the second track 550 may be configured to extend in the third direction, and the third track 580 may extend in the second direction, or the second track 550 and/or the third track 580 may not be used. For example, referring to the embodiment of fig. 14, the second rail 550 extends along a third direction, the bed net assembly does not include the third rail 580, the second driving member 590 uses a linear air cylinder, a linear motor or the like, the third mounting seat 570 is mounted at the output end of the second driving member 590, and the second driving member 590 drives the third mounting seat 570 to move along the second direction.

It will be appreciated that the second drive 590 and the third drive can drive the welding blade 310 in other ways than by linear movement. In other possible embodiments, the second driving element 590 can drive the welding blade assembly 300 to extend or retract, and the third driving element can drive the two sets of welding blades to rotate respectively through a clutch or similar switching device. In such an embodiment, taking the first welding blade 311 as an example, the second driving element 590 first retracts the first welding blade 311, and the first welding blade 311 is drawn out from the spring string 900; then the third driving member rotates the first welding blade 311, and in the rotating process, the second driving member 590 makes the first welding blade 311 extend out and reset; at the end of the rotation process, the extended first welding blade 311 pushes the spring string 900 away from the feeding assembly 100.

In some possible embodiments, the spacing between welding blades 310 is adjustable. Adjusting the pitch of the welding blades 310 enables the welding blades 310 to exactly correspond to the welding position between the two pocketed springs in the first direction. In particular, the distance between two adjacent welding knives 310 in the same gang welding knife assembly 300 is equal to the distance between the individual diameters of two pocketed springs, that is, the distance between the first welding positions 910 or the distance between the second welding positions 920. For example, referring to the embodiment of fig. 1, the welding cutter assembly includes a fourth rail 330 and a fourth mounting seat 320, the fourth rail 330 extends along the first direction, the fourth mounting seat 320 is mounted on the fourth rail 330, the welding cutter 310 is mounted on the fourth mounting seat 320, the position of the fourth mounting seat 320 is adjusted along the fourth rail 330, and the fourth mounting seat 320 is locked by a fastener such as a screw after the position is adjusted.

In some possible embodiments, referring to fig. 4, the bed wire assembly includes a support 610, the support 610 displacing an opposite side of the welding surface of the welding blade 310, the support 610 for supporting an end of the welding blade 310 away from the fourth mount 320. The support 610 and the fourth mount 320 serve as fulcrums at both ends of the welding blade 310, respectively, so that deformation of the welding blade 310 when the ultrasonic horn 210 is pressed against the welding blade 310 to perform welding can be reduced. In some possible embodiments, the support 610 extends in a first direction, and the plurality of welding blades 310 share one support 610.

With continued reference to fig. 4, in some possible embodiments, the blade 310 forms a convex surface toward the ultrasonic horn 210, the convex surface serving to better conform the blade 310 to the ultrasonic horn 210 after being forced into deformation. Specifically, when ultrasonic horn 210 is pressed against the convex surface, blade 310 is deformed by the pressure, thereby restoring the convex surface to a flat surface and better engaging ultrasonic horn 210.

In some possible embodiments, the bed net assembly apparatus includes a blanking assembly 400, and the blanking assembly 400 is used for receiving the spring string 900 sent out by the welding knife assembly 300. In the embodiment of fig. 1, the two sets of welding blade assemblies 300 are located on the same side of the blanking assembly 400 in the third direction, and in the embodiment of fig. 14, the two sets of welding blade assemblies 300 are located on two sides of the blanking assembly 400 in the third direction. Fig. 2 and 15 show the positional relationship of two sets of welding blade assemblies 300 in two embodiments, respectively. When positioned on the same side, the two sets of welding tip assemblies 300 move in the same direction when being withdrawn from the welded spring string 900; on both sides, the two sets of cutter assemblies 300 move in opposite directions when extracted from the welded spring string 900.

The description of the blanking assembly is continued. In some possible embodiments, the blanking assembly includes a socket 410, the socket 410 being located on an opposite side of the welding surface of the welding blade 310 in the second direction, the socket 410 being configured to receive the spring string 900 fed out of the welding blade assembly 300. The susceptor 410 may include at least one of a stage, a baffle, and a conveyor belt. In the embodiment of fig. 1 and 14, the socket 410 uses a carrier, the welding cutter assembly 300 feeds the spring string 900 to the upper side of the socket 410, the socket 410 holds the spring string 900, and after the bed net is assembled, the bed net is taken out of the blanking assembly manually or by other tools. In other embodiments, the carrier 410 uses a conveyor belt that is capable of conveying the bed net in the second direction after the bed net is assembled, thereby automatically feeding out the bed net. In addition, the number of the sockets 410 may be two, and the two sockets 410 are spaced apart in the third direction, thereby forming a blanking channel.

The support member 610 may be mounted on the socket 410. It should be understood that the "mounting" may be either the support member 610 being detachably mounted on the socket 410 or the support member 610 being integrated with the socket 410.

In some possible embodiments, the bed net assembly includes a guide 620, the guide 620 is provided on the welding cutter assembly 300 or the blanking assembly 400, the guide 620 includes a guide slope inclined to an end surface of the spring string 900 in which the spring is pocketed, and the guide 620 is used to align the spring string 900 in a first direction and guide the spring string 900 to move in a second direction.

In some possible embodiments, the blanking assembly 400 includes two sets of receiving units 410, the two sets of receiving units 410 are spaced apart in a third direction, and a receiving channel is formed between the two sets of receiving units 410. The welding knife 310 can press the laid spring string 900 to the material receiving channel, so that the bed net is sent out through the material receiving channel. Accordingly, in some possible embodiments, the bed net assembly includes two sets of guiding members 620, the two sets of guiding members 620 are oppositely arranged in the third direction, the two sets of guiding members 620 form a guiding channel with gradually reduced cross-sectional area, and the guiding members 620 are used for guiding the spring string 900 to enter the receiving channel. Referring to the embodiment of fig. 1 and 4, the guide 580 may be mounted on the fourth mounting seat 320, and in other embodiments, the guide 580 may also be mounted on the bearing 410.

The embodiment of the application also provides a bed net combination method, the bed net combination method combines the spring strings 900 into the rubber-free bed net through the bed net combination equipment of any embodiment, and the bed net combination method comprises the following steps:

step 100: the feeding assembly 100 moves in a first direction to lay a first row of spring strings 900 on the first set of welding knives 310;

step 200: the second group of welding knives 310 move to one side of the spring strings 900 in the odd rows close to the feeding assembly 100 and then move along the second direction to drive the spring strings 900 in the odd rows to reach the welding station;

step 300: the feeding assembly 100 moves along the first direction, and the spring 900 strings in even rows are laid on the spring 900 strings in odd rows;

step 400: the horn assembly 200 is moved in a first direction to a position corresponding to the first set of blades 310, the ultrasonic horn 210 is pressed in a second direction against the first set of blades 310, and the ultrasonic horn 210 and the first set of blades 310 weld the even-numbered rows of spring strings 900 to the odd-numbered rows of spring strings 900 at the first welding positions 910;

step 500: the first set of welding knives 310 is withdrawn from the spring string 900;

step 600: the first group of welding knives 310 move to one side of the spring strings 900 in the even rows close to the feeding assembly 100 and then move along the second direction to drive the spring strings 900 in the even rows to reach the welding station;

step 700: the feeding assembly 100 moves along the first direction, and the spring strings 900 in odd rows are laid on the spring strings 900 in even rows;

step 800: horn assembly 200 is moved to a position corresponding to second set of blades 310, ultrasonic horn 210 is pressed in a second direction against second set of blades 310, and ultrasonic horn 210 and second set of blades 310 weld second weld locations 920 of odd and even rows of

spring strings

900 and 900;

step 900: second set of welding knives 310 are withdrawn from spring string 900;

repeating steps 200 to 900 until the spring string 900 is welded into a bed net of a predetermined size.

In some possible embodiments, step 100 is preceded by step 10 of: adjusting the first set of welding blades 310 such that the first set of welding blades 310 correspond to the first welding position 910 of the spring string 900 in the first direction; and adjusting the second group of welding knives 310 to enable the second group of welding knives 310 to correspond to the second welding position 920 of the spring string 900 in the first direction, wherein the position of the second group of welding knives 310 in the first direction is fixed in the welding step.

It is understood that after step 10 is completed, the distance between two adjacent first welding blades 311 is equal to the distance between two first welding positions 910, and the distance between two adjacent second welding blades 312 is equal to the distance between two second welding positions 920.

In some possible embodiments, horn assembly 200 is moved in the third direction to the work area before horn assembly 200 is moved in the first direction, and after welding is completed, horn assembly 200 is moved in the third direction to the avoidance area. It is understood that "weld complete" refers to ultrasonic horn 210 and first set of blades 310 cooperating to complete all welds at first weld location 910 or ultrasonic horn 210 and second set of blades 310 cooperating to complete all welds at second weld location 920.

In some possible embodiments, step 400 is repeated to complete all welds at first weld location 910 when the number of ultrasonic horns 210 is less than the number of first set of blades 310, and step 800 is repeated to complete all welds at second weld location 920 when the number of ultrasonic horns 210 is less than the number of second set of blades 310.

Fig. 5 to fig. 13 show the operation process of the bed net combining method performed by the bed net combining device based on the bed net combining device embodiment of fig. 1. It is understood that fig. 5 to 13 each represent only a certain moment during the operation of the bed net assembly, and do not completely represent all the operations performed by the bed net assembly in one step.

Reference is made in sequence to fig. 5 to 13. Referring first to fig. 5, under the driving of the third driving member, the second welding blade 312 (i.e., the second group of welding blades 310) moves upward in the third direction to be extracted from the spring string 900, and then under the driving of the second driving member 590, the second welding blade 312 moves forward in the second direction to reach the front of the odd-numbered rows of spring strings 900, and then the second welding blade 312 is reset again in the third direction;

referring next to fig. 6, second welding blade 312 is moved back in a second direction, pressing odd rows of spring strings 900 against first welding blade 311 (i.e., first set of welding blades 310), on the one hand, positioning first welding blade 311 to correspond to the welding positions of odd rows of spring strings 900, and on the other hand, also positioning odd rows of spring strings 900 into blanking assembly 400;

referring next to fig. 7, under the driving of the fifth driving member, the feeding assembly 100 and the welding head assembly 200 move leftwards in the first direction, and the spring strings 900 in the even rows are laid on the spring strings 900 in the odd rows;

referring next to fig. 8, the horn assembly 200 is moved to a position corresponding to the first welding blade 311, the ultrasonic horn 210 is pressed against the first welding blade 311 in the second direction, and the spring strings 900 in the even rows are welded to the spring strings 900 in the odd rows;

referring next to fig. 9, horn assembly 200 is moved in a third direction for avoidance and first horn 311 is moved upwardly in the third direction for extraction from spring string 900;

referring next to fig. 10, the first welding blade 311 moves forward in the second direction to reach above the even-numbered rows of spring strings 900, and is reset again in the third direction;

referring next to fig. 11, the first welding blade 311 moves backward in the second direction, pressing the spring strings 900 of the even number rows against the second welding blade 312, so that the second welding blade 312 corresponds in position to the welding position of the spring strings 900 of the even number rows on the one hand, and the spring strings 900 of the even number rows also enter the blanking assembly 400 on the other hand;

referring next to fig. 12, under the driving of the fifth driving element, the feeding assembly 100 and the welding head assembly 200 move rightward in the first direction, and the spring strings 900 in odd rows are laid on the spring strings 900 in even rows;

referring next to fig. 13, horn assembly 200 is moved to a position corresponding to second horn 312 and ultrasonic horn 210 is pressed in a second direction against second horn 312 to weld odd rows of spring strings 900 to even rows of spring strings 900. After welding is complete, horn assembly 200 is moved in a third direction to avoid.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A bed net assembly apparatus, comprising:

the spring string conveying device comprises a feeding assembly, a conveying assembly and a conveying mechanism, wherein the feeding assembly can move in a first direction and is used for conveying a spring string, and the spring string comprises a plurality of bagged springs which are sequentially connected;

the welding head assembly is located on the same side of the welding cutter assembly with the feeding assembly in the second direction, the welding head assembly comprises an ultrasonic welding head and a first driving piece, the ultrasonic welding head is arranged along the first direction at intervals, the first driving piece is used for driving the ultrasonic welding head to be close to and far away from the welding cutter in the second direction, so that the ultrasonic welding head and the welding cutter can be matched to complete welding, and the welding head assembly can move in the third direction to avoid the feeding assembly.

2. The bed net assembly apparatus as set forth in claim 1, wherein: the bed net combined equipment comprises a first rail, the first rail extends in a first direction, the welding head assembly is installed on the first rail, the welding head assembly comprises a first installation seat, the first installation seat and the first driving piece correspond to the ultrasonic welding heads one to one, the first installation seats are installed on the first rail at intervals, the first driving piece and the ultrasonic welding heads are installed on the corresponding first installation seats, the distance between the ultrasonic welding heads is adjustable, and the first driving piece is used for driving the corresponding ultrasonic welding heads to be close to or far away from the welding cutter.

3. The bed net assembly apparatus as set forth in claim 1, wherein: the welding head assembly comprises a first mounting seat, a plurality of ultrasonic welding heads are mounted on the first mounting seat at intervals in the first direction, the distance between the ultrasonic welding heads is adjustable, and a first driving piece is used for driving the ultrasonic welding heads to be close to or far away from the welding knife.

4. The bed net assembly apparatus as set forth in claim 1, wherein: the bed net combination equipment comprises a seventh driving piece, a fifth rail and a fifth mounting seat, the fifth rail extends along the third direction, the fifth mounting seat is mounted on the fifth rail, the seventh driving piece can drive the fifth mounting seat to move along the fifth rail, and the welding head assembly is movably mounted on the fifth mounting seat.

5. The bed net assembly apparatus as set forth in claim 1, wherein: the bed net combination equipment comprises a fourth driving piece, and the fourth driving piece is used for driving the welding head assembly to move along the first direction, so that the ultrasonic welding head can complete welding at different positions.

6. The bed net assembly apparatus as set forth in claim 1, wherein: the feeding assembly comprises a sixth driving element and conveying elements, the conveying elements are arranged in pairs at intervals in the first direction or the third direction, a feeding channel is formed between the conveying elements in pairs, at least one conveying element is a driving element, the driving element comprises at least one of a ratchet wheel, a roller and a conveying belt, and the sixth driving element is used for driving the driving element to convey the spring string.

7. The bed net assembly apparatus as set forth in claim 6, wherein: the feeding assembly comprises a limiting part, the limiting part extends in the second direction, and the limiting part and the conveying part jointly form the feeding channel.

8. The bed net assembly apparatus as set forth in claim 1, wherein: the bed net combined equipment comprises a second driving piece and a third driving piece, the second driving piece is used for driving the welding cutter assembly to move along the second direction, and the third driving piece is used for driving the welding cutter assembly to move along the third direction.

9. The bed net assembly apparatus as set forth in claim 1, wherein: the space between the welding knives is adjustable.

10. The bed net assembly apparatus as set forth in claim 1, wherein: the welding cutter assembly comprises a fourth mounting seat, one end of the welding cutter is installed on the fourth mounting seat, the bed net combined equipment comprises a supporting piece, the supporting piece is located on the opposite side of the welding surface of the welding cutter, and the supporting piece is used for supporting the other end of the welding cutter.

11. The bed net assembly apparatus as set forth in claim 10, wherein: the welding knife forms a convex surface facing the ultrasonic welding head, and the convex surface is used for enabling the welding knife to be better attached to the ultrasonic welding head after being stressed and deformed.

12. The bed net assembly apparatus as set forth in claim 1, wherein: the bed net combined equipment comprises a blanking assembly, the blanking assembly comprises a receiving piece, the receiving piece is located on the opposite side of the welding surface of the welding knife in the second direction, and the receiving piece is used for receiving the spring string sent out by the welding knife assembly.

13. The bed net assembly apparatus of claim 12, wherein: the bed net combined equipment further comprises a guide piece, the guide piece is arranged on the welding cutter assembly or the blanking assembly and comprises a guide inclined plane, the guide inclined plane is inclined to the end face of a bagged spring in the spring string, and the guide piece is used for enabling the spring string to be neatly arranged in the first direction and guiding the spring string to move towards the second direction.

14. The bed net assembly as set forth in claim 13, wherein: the unloading subassembly includes two sets ofly the receiving piece, bed net equipment includes two sets ofly the guide part, two sets ofly the receiving piece is in third direction interval arrangement, two sets ofly form between the receiving piece and connect the material passageway, two sets of the guide part is in third direction mutual disposition, the direction inclined plane is in the third direction is upwards partly or wholly be located welding face one side of welding cutter, two sets ofly the guide part forms the guide way that the sectional area reduces gradually, the guide part is used for guiding the spring cluster gets into connect the material passageway.

15. The bed net assembly apparatus of claim 12, wherein: the two groups of welding cutter assemblies are respectively positioned on two sides of the blanking assembly in the third direction, or the two groups of welding cutter assemblies are positioned on the same side of the blanking assembly in the third direction.

16. A bed wire assembling method characterized by assembling spring strings into a rubber-free bed wire by the bed wire assembling apparatus of any one of claims 1 to 15, the bed wire assembling method comprising the steps of:

step 200: the second group of welding knives moves to one side of the spring strings in the odd rows close to the feeding assembly and then moves along a second direction to drive the spring strings in the odd rows to reach a welding station;

step 500: a first set of said welding knives being withdrawn from said string of springs;

step 800: the welding head assembly moves to a position corresponding to a second group of the welding knives in the first direction, the ultrasonic welding head presses towards the second group of the welding knives in the second direction, and the ultrasonic welding head and the second group of the welding knives weld second welding positions of the spring strings in odd rows and the spring strings in even rows;

17. The bed net combining method as set forth in claim 16, wherein: before the step 100, the method further comprises the step 10: adjusting the first group of welding knives to enable the first group of welding knives to correspond to a first welding position of the spring string in the first direction; and adjusting a second group of welding knives to enable the second group of welding knives to correspond to a second welding position of the spring string in the first direction, wherein in the welding step, the position of the welding knives in the first direction is fixed.

18. The bed net combining method as set forth in claim 16, wherein: and before the welding head assembly moves in the first direction, the welding head assembly moves to a working area along a third direction, and after welding is finished, the welding head assembly moves to an avoidance area along the third direction.

19. A bed net assembling method according to claim 16 or 18, characterized in that: when the number of the ultrasonic welding heads is less than that of the first group of the welding knives, the step 400 is repeatedly executed to complete the welding of all the first welding positions, and when the number of the ultrasonic welding heads is less than that of the second group of the welding knives, the step 800 is repeatedly executed to complete the welding of all the second welding positions.