Spring pad production equipment

Abstract

The present invention relates to a spring pad production device. The spring pad production device provided by the present invention comprises: a fabric supply device, used to supply and tension the upper fabric and the lower fabric in an interval up and down manner; a spring core supply device, used to supply the spring core between the upper fabric and the lower fabric; a fabric sewing device, used to sew the upper fabric and the lower fabric around the spring core. The spring pad production device proposed by the present invention sews the upper fabric and the lower fabric around the spring by sewing, thereby avoiding the use of adhesives and simplifying the production process.

Description

Technical Field

[0001] The invention relates to a bedding production device, in particular to a spring pad production device. Background Art

[0002] With the improvement of living standards, people's requirements for the comfort of bedding are gradually increasing. The softness and hardness of independent pocket spring mattresses are moderate and are generally popular among people.

[0003] Each pocket spring mattress includes a large number of pocket springs, which are regularly arranged in multiple rows and columns to form a spring mattress, wherein each pocket spring is bonded to multiple adjacent pocket springs on the side.

[0004] This type of spring pad uses a lot of adhesives in its production, and in order to meet environmental certification requirements, higher material costs are required; there are many processes and manual operations, which is not conducive to automation.

[0005] The above-mentioned deficiencies are what those skilled in the art expect to overcome. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In order to solve the above problems in the prior art, the present invention provides a spring pad production device to replace the current gluing process in the production of independent pocket spring mattresses.

[0008] (II) Technical solution

[0009] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the present invention include:

[0010] A spring pad production device, comprising:

[0011] A fabric supply device, used for supplying and tensioning the upper fabric and the lower fabric at intervals up and down;

[0012] A spring core supply device, used for supplying the spring core between the upper fabric layer and the lower fabric layer;

[0013] The fabric sewing device is used for sewing the upper fabric and the lower fabric around the spring core.

[0014] Specifically, the device,

[0015] The spring cores include a plurality of spring cores, which are arranged in rows along the width direction of the fabric;

[0016] The fabric sewing device is used for sewing the upper fabric and the lower fabric around each spring core.

[0017] Specifically, the device,

[0018] The fabric sewing device includes a horizontal stitching device and a vertical stitching device, which are respectively used to form stitching lines around the spring core along the fabric width direction and stitching lines along the fabric feeding direction, wherein the fabric feeding direction and the fabric width direction are perpendicular to each other in a horizontal plane.

[0019] Specifically, the device,

[0020] After the horizontal stitching device forms stitching lines around the spring core in the direction of the fabric width, the vertical stitching device forms stitching lines around the spring core in the direction of the fabric feeding; or

[0021] In the fabric feeding direction, the horizontal line sewing device is arranged before the vertical line sewing device.

[0022] Specifically, the device further includes:

[0023] The spring core pressing mechanism is arranged behind the horizontal line sewing device and is used to press down the upper fabric layer to compress the spring core between the upper fabric layer and the lower fabric layer.

[0024] Specifically, the device further includes:

[0025] The fabric pressing mechanism is arranged before the transverse sewing device and is used to press the upper fabric and the lower fabric when the transverse sewing device forms a sewing line around the spring core along the fabric width direction.

[0026] Specifically, the equipment, the horizontal line suturing device comprises:

[0027] At least one single-needle sewing machine head, wherein the at least one single-needle sewing machine head is arranged at intervals along the width direction of the fabric;

[0028] Each of the single-needle sewing machine heads is used to form a section of stitching line around the spring along the width direction of the fabric.

[0029] Specifically, the device,

[0030] The vertical suturing device comprises:

[0031] At least one multi-needle sewing mechanism, wherein the at least one multi-needle sewing mechanism is arranged at intervals along the width direction of the fabric;

[0032] Each of the multi-needle sewing mechanisms is used to form multiple sections of stitching lines around the spring along the fabric feeding direction, and the multiple sections of stitching lines are parallel to each other.

[0033] Specifically, the device,

[0034] The interval between the upper fabric layer and the lower fabric layer is smaller than the height of the spring core in a free state;

[0035] When the spring core supply device supplies the spring core to a sewing position, the spring core is pre-compressed;

[0036] The fabric sewing device is used for sewing the upper fabric and the lower fabric around the pre-compressed spring core.

[0037] Specifically, the device,

[0038] The fabric sewing device comprises:

[0039] At least one single-needle sewing machine head, wherein the at least one single-needle sewing machine head is arranged at intervals along the width direction of the fabric;

[0040] A transverse drive device for causing the at least one single-needle sewing machine head to reciprocate along the width direction of the fabric;

[0041] A vertical driving device is used to make the at least one single-needle sewing machine head move back and forth along the fabric feeding direction.

[0042] (III) Beneficial effects

[0043] The beneficial effects of the present invention are:

[0044] The spring pad production equipment proposed in the present invention is respectively provided with a fabric supply device for supplying and tensioning the upper fabric and the lower fabric at intervals up and down, a spring core supply device for supplying springs between the upper fabric and the lower fabric, and a sewing device for sewing the upper fabric and the lower fabric around the spring.

[0045] Compared with the prior art, the spring pad production equipment proposed in the present invention sews the upper fabric and the lower fabric around the independent spring by sewing, thereby realizing both the spring pocketing and the connection of adjacent spring pockets in one process, thereby simplifying the production process of independent pocket spring mattresses; the sewing process is used to replace the existing gluing process, thereby avoiding the use of adhesives in the production of spring pads, and can significantly improve the environmental performance of the finished spring pads. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of a spring pad production device according to an embodiment of the present invention;

[0047] Figure 2 for Figure 1 A schematic diagram of a side view angle of FIG.

[0048] Figure 3 for Figure 2 A local enlarged view of point A;

[0049] Figure 4 A schematic diagram of a spring pad produced by a spring pad production device according to an embodiment of the present invention;

[0050] Figure 5 for Figure 4 Schematic diagram of the side view angle. DETAILED DESCRIPTION

[0051] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0052] It should be noted that the "spring core" in the following description refers to a small section of spring produced by a spring production equipment such as a spring coiling machine. After being pre-compressed, these small sections of spring can elastically support the load with a preset stiffness. These small sections of spring are usually arranged in parallel to form various spring pads, and are used in various terminal products, such as mattresses, sofa cushions, chair cushions, chair backs, shoes, etc. The spring pad used in a specific terminal product can use spring cores of various specifications.

[0053] A spring pad production device according to an embodiment of the present invention includes: a fabric supply device for supplying and tensioning an upper fabric and a lower fabric at intervals from top to bottom; a spring core supply device for supplying a spring core between the upper fabric and the lower fabric, wherein the spring core is pre-compressed between the upper fabric and the lower fabric; and a fabric sewing device for sewing the upper fabric and the lower fabric around the pre-compressed spring core.

[0054] During specific implementation, the fabric supply device of the spring pad production equipment of this embodiment tensions the upper fabric and the lower fabric respectively, forms a preset interval between the upper fabric and the lower fabric, and synchronously supplies the upper fabric and the lower fabric along the fabric feeding direction.

[0055] It should be understood that the tensioned upper fabric is located in one horizontal plane, and the tensioned lower fabric is located in another horizontal plane.

[0056] The spring core supply device of the spring pad production equipment of this embodiment supplies the spring core to the gap between the tensioned upper fabric and the lower fabric. After the spring core reaches the supply position, the top of the spring core abuts against the upper fabric, the bottom of the spring core abuts against the lower fabric, and the longitudinal axis of the spring core is perpendicular to the tensioned upper fabric and the tensioned lower fabric, respectively.

[0057] In addition, by making the interval between the tensioned upper layer fabric and the tensioned lower layer fabric smaller than the height of the spring core in a free state, the spring core at the supply position has a preset pre-compression amount.

[0058] The spring core at the supply position is compressed, so that it has a pre-compression amount, which is beneficial to ensure that the spring core is enclosed in the gap between the upper and lower fabrics and the stitching line, so that the finished spring pad has a preset support stiffness.

[0059] On the other hand, the spring core at the supply position is compressed so that the pre-compression amount can also reduce the length difference between the upper and lower layers of fabric consumed during sewing, so that the longitudinal section of the space surrounding the spring core is approximately an isosceles trapezoid with two bottoms facing each other.

[0060] It should be noted that, before the spring core is supplied to the supply position by the spring core supply device, it can be in a compressed state or in a free state.

[0061] The sewing device of the spring pad production equipment of this embodiment sews the upper fabric and the lower fabric around the pre-compressed spring core to form a closed seam line around the spring core; after sewing, the upper fabric covering the upper end surface of the spring core, the lower fabric wrapped under the lower end surface of the spring core, and the seam line combining the upper fabric and the lower fabric around the spring core form an independent closed space around the spring core to accommodate the spring core.

[0062] It should be understood that when the sewing device sews the upper fabric and the lower fabric around the spring core, the stitching trajectory formed on the upper fabric or the lower fabric can be flexibly set as needed. For example, the shape of the closed stitching line finally formed on the fabric can be a pre-set plane geometric shape such as a circle, rectangle, or square.

[0063] In a specific implementation, the sewing device may include at least one single-needle sewing head, and the at least one single-needle sewing head is arranged at intervals along the width direction of the fabric; the sewing device may also include a horizontal drive device for causing the at least one single-needle sewing head to reciprocate along the width direction of the fabric, and a vertical drive device for causing the at least one single-needle sewing head to reciprocate along the fabric feeding direction.

[0064] By controlling the transverse drive device and / or the vertical drive device respectively so that they drive the at least one single-needle sewing machine head to move, a sewing stitch having a preset plane geometry and enclosing the spring core can be formed.

[0065] The spring pad production equipment of this embodiment uses sewing to independently constrain a single spring core in an independent closed space formed by the upper and lower fabrics and the sewing lines; according to the design requirements of the finished spring pad, the spring pad production equipment can arrange multiple, multiple groups, and multiple specifications of single spring cores in sequence between the upper and lower fabrics to provide a pre-set support stiffness.

[0066] The spring pad production equipment of this embodiment arranges multiple independent spring cores at intervals between the upper and lower fabrics using stitching lines to form a spring pad; the use of adhesives is avoided, and the environmental performance of the spring pad is improved.

[0067] At present, the production of spring pads usually includes the production process of spring cores, the production process of pocket spring core strings, and the gluing process of pocket spring core strings, involving a variety of equipment such as spring punching machines, bagging machines, and gluing machines. The spring pad production equipment of this embodiment can form a production line with the spring core production equipment. After the spring core produced by the spring core production equipment is transported to the spring pad production equipment of this embodiment, the spring pad production equipment of this embodiment can complete the multiple processes of arranging spring cores, closing spring cores, and connecting spring cores, simplifying the production process, improving production efficiency, and reducing the site space occupied by the equipment.

[0068] The above description uses the example of processing a single spring core each time to explain the spring pad production equipment that uses stitching lines to arrange independent spring cores at intervals to form a whole spring pad.

[0069] Preferably, in order to further improve production efficiency, the spring core supply device supplies a spring core group between the tensioned upper and lower fabrics, and all the spring cores in the spring core group are arranged in a straight line at intervals along the width direction of the fabric, and the longitudinal axes of all the spring cores are parallel to each other, and the plane where the longitudinal axes of all the spring cores are located is perpendicular to the fabric feeding direction.

[0070] After the pre-compressed spring core group reaches the supply position, the top of each spring core abuts against the upper fabric, the bottom of each spring core abuts against the lower fabric, and the longitudinal axis of each spring core is perpendicular to the tensioned upper fabric and the tensioned lower fabric respectively.

[0071] Correspondingly, the fabric sewing device comprises a horizontal stitching device and a vertical stitching device, which are respectively used to form stitching lines around the spring core along the fabric width direction and stitching lines along the fabric feeding direction.

[0072] Preferably, the horizontal line sewing device forms a common horizontal sewing line (i.e., horizontal line) extending along the width direction of the fabric between two adjacent spring core groups; the vertical line sewing device forms a common vertical sewing line (i.e., vertical line) extending along the fabric feeding direction between two adjacent spring cores in each group of spring core groups.

[0073] By making two adjacent spring core groups share a transverse stitching line (i.e., the transverse line) and two adjacent spring cores share a vertical stitching line (i.e., the vertical line), it is beneficial to reduce the total length of the stitching line and improve production efficiency; increase the effective working area of ​​the upper fabric and the lower fabric; and also help to increase the spring density in the spring pad.

[0074] Therefore, the spring pad production equipment forms transverse stitching lines along the width direction of the fabric and vertical stitching lines along the fabric feeding direction around the pre-compressed spring core respectively. The transverse stitching lines and the vertical stitching lines are combined to form closed rectangular track stitching lines distributed around the pre-compressed spring core and sewing the upper and lower fabrics.

[0075] A horizontal stitching device and a vertical stitching device are respectively provided for forming stitching lines around the spring core along the width direction of the fabric and stitching lines along the feed direction of the fabric, so that the stitching lines formed by the spring pad production equipment have high positional accuracy and good consistency of each stitching line, and the elasticity (that is, support stiffness) of the finished spring pad is more stable and more uniform, the service life is longer, and the quality is higher.

[0076] In addition, the spring pad production equipment no longer uses a single spring core as the smallest processing unit, but uses a spring core group as the smallest processing unit, which has higher production efficiency.

[0077] Further preferably, along the fabric feeding direction, the horizontal line sewing device is arranged before the vertical line sewing device.

[0078] Specifically, along the fabric feeding direction, after the horizontal line sewing device forms the sewing line around the spring along the fabric width direction, the vertical line sewing device forms the sewing line around the spring along the fabric feeding direction; when the horizontal line sewing device forms the sewing line around the spring along the fabric width direction, the fabric supplying device stops supplying fabric; when the fabric supplying device continuously supplies fabric, the vertical line sewing device forms the sewing line around the spring along the fabric feeding direction.

[0079] That is, the fabric supply device intermittently feeds the fabric along the length direction of the fabric, and the length of the fabric fed each time is the predetermined inter-group distance J between two adjacent spring core groups.

[0080] In accordance with the supporting stiffness and other performance parameters of the finished spring pad, the specification of each group of spring cores in the multiple groups of spring cores in the finished spring pad can be flexibly set; in the entire finished spring pad, the distance between two adjacent spring core groups can be the same or different.

[0081] Usually, the needle travel of a fabric sewing device is limited. In order to ensure smooth sewing and form firm horizontal seams, the pre-compressed spring core between the upper and lower fabrics and the upper and lower fabrics arranged at intervals can be further compressed to reduce the interval to adapt to the needle travel.

[0082] On the other hand, further pressing can also prevent the size of the fabric between adjacent horizontal or vertical stitches from being too large, resulting in too small a supporting stiffness of the finished spring pad.

[0083] Preferably, the spring pad production equipment also includes a spring core pressing mechanism arranged on one side of the horizontal line sewing device, which is used to press the spring core group between the upper fabric and the lower fabric in the vertical direction during the process of the horizontal line sewing device forming a sewing line around the spring core along the width direction of the fabric.

[0084] Specifically, the spring core pressing mechanism has a lifting position and a dropping position; the spring core pressing mechanism includes a pressing plane, and in the lifting position, the pressing plane is located above the upper fabric; in the dropping position, the pressing plane is in contact with the upper fabric and vertically presses the upper fabric and the spring core or spring core group located under the upper fabric downward.

[0085] Preferably, the spring pad production equipment also includes a fabric pressing mechanism arranged on the other side of the horizontal line sewing device, which is used to press the upper and lower fabrics in the vertical direction during the process of the horizontal line sewing device forming the sewing line along the width direction of the fabric around the spring core to avoid fabric movement, thereby ensuring uniform stitch length during horizontal line sewing.

[0086] Specifically, the fabric pressing mechanism has a lifting position and a falling position; the fabric pressing mechanism includes a pressing plane, and in the lifting position, the pressing plane is located above the upper fabric; in the falling position, the pressing plane is in contact with the upper fabric and presses the upper fabric and the lower fabric vertically downward.

[0087] Specifically, the horizontal line sewing device includes at least one single-needle sewing head, which is arranged at intervals along the width direction of the fabric, and each of the single-needle sewing heads is used to form a section of sewing line around the spring along the width direction of the fabric.

[0088] Specifically, the sections of suture lines formed by the at least one single-needle sewing machine head are connected end to end, and the sections of suture lines are aligned along the length direction of the fabric, and all the suture lines form a straight line extending along the width direction of the fabric.

[0089] The horizontal line sewing device may also include at least one linear motion drive device for causing the at least one single-needle sewing head to reciprocate along the width direction of the fabric. Each single-needle sewing head may share a linear motion drive device, or may be independently provided with a linear motion drive device.

[0090] Providing at least one sewing machine head to segmentally complete the stitching lines around the spring core group along the width direction of the fabric can improve production efficiency; it is also convenient to form stitching lines of different densities according to the different specifications of the spring cores in each spring core group.

[0091] Preferably, the vertical line sewing device includes: at least one multi-needle sewing mechanism, which is arranged at intervals along the width direction of the fabric; each of the multi-needle sewing mechanisms is used to form multiple sections of mutually parallel sewing lines around the spring along the length direction of the fabric, and the sewing lines formed by the at least one multi-needle sewing mechanism are parallel to each other.

[0092] Taking into account the convenience, complexity and stability of the structural setting during operation, the vertical stitching device is provided with a multi-needle sewing mechanism along its width direction, so as to ensure the smooth and efficient operation of the spring pad production equipment.

[0093] Specifically, the distance between adjacent presser feet and needles of the multi-needle sewing mechanism along the fabric width direction is the intra-group distance between two adjacent spring cores in the corresponding spring core group along the fabric width direction. In addition, the distance between adjacent presser feet and needles of the multi-needle sewing mechanism along the fabric width direction can be flexibly adjusted according to the intra-group distance between two adjacent spring cores in the spring core group along the fabric width direction.

[0094] The spring pad production equipment is described in detail below in conjunction with the accompanying drawings.

[0095] Figure 1 The direction of the arrow in the middle is the fabric feeding direction (in some directions, it is also the length direction of the fabric), the fabric feeding direction is the back, and the opposite direction of the fabric feeding direction is the front. The "front" and "back" of the relative positions involved in the following description are based on this definition.

[0096] like Figure 1 and Figure 2 As shown, the spring pad production equipment is provided with a single-needle sewing machine head 10 for sewing horizontal stitching lines, a fabric pressing mechanism 20 arranged in front of the single-needle sewing machine head 10, a spring core pressing mechanism 30 arranged behind the single-needle sewing machine head 10, a multi-needle sewing mechanism 40 for sewing vertical stitching lines, and a pair of rollers 50 for delivering the sewn spring pads.

[0097] Before the single-needle sewing machine head 10 , the spring pad production equipment is also provided with a fabric rack (not shown in the figure), a guide roller (not shown in the figure) for guiding the extension direction of the fabric, and a spring core supply device 60 .

[0098] The frame of the spring pad production equipment is provided with a planar workbench 110. In the process of moving along the surface of the planar workbench 110, the lower layer fabric 200 and the upper layer fabric 200 are sewn together, thereby combining the spring core between the upper and lower layers of fabric.

[0099] The fabric supply device includes the fabric frame, the guide roller and the pair of rollers 50, which are driven by a power device to coordinate and operate to pull the upper fabric and the lower fabric from the fabric frame (not shown in the figure) respectively, so that the upper fabric and the lower fabric are separated and tensionedly arranged under the single-needle sewing head 10 and the multi-needle sewing mechanism 40; in each production cycle of the spring pad production equipment, the fabric supply device intermittently supplies the upper and lower fabric layers and the spring core (and group) along the length direction of the fabric and intermittently outputs the finished spring pad from the rear of the pair of rollers 50.

[0100] It should be noted that the spring core supply device can be implemented by any publicly available technology, such as: multiple spring cores are arranged by a manual or automatic device, and the arranged spring core group is placed on a spring core arrangement plate, and a spring core push plate that can move back and forth linearly is provided on one side of the spring core arrangement plate; the spring core push plate pushes the arranged spring core group away from the spring core arrangement plate, and continues to feed it into the gap between the upper fabric and the lower fabric, and when the spring core group is supplied to the sewing position between the upper and lower fabrics, the spring core push plate retracts to its original position and is ready to start pushing the next group of spring core groups to be supplied. The spring core arrangement plate is located in a position where the spring core can be received; there is no position or motion interference between the spring core arrangement plate and the spring core push plate and the fabric sewing device.

[0101] like Figure 3 As shown, the fabric pressing mechanism 20 includes a fabric pressing cylinder 21 and a pressure block 22 driven by the fabric pressing cylinder 21 to reciprocate in a straight line in the vertical direction; when the single-needle sewing machine head 10 is lifted, the pressure block 22 is lifted accordingly; after the spring core or the spring core group is pushed by the spring core supply device to the horizontal line sewing station H located behind the single-needle sewing machine head 10, the pressure block 22 falls before the single-needle sewing machine head 10 to press the upper layer of fabric against the flat workbench; when the single-needle sewing machine head 10 falls and sews the horizontal line extending along the width direction of the fabric, the pressure block 22 remains in the falling state until the single-needle sewing machine head 10 completes the horizontal line sewing and is lifted upward, and then the pressure block 22 is lifted again.

[0102] When the pressing block 22 is in the raised position, it is away from the upper fabric; at this time, the spring core supply device can deliver the spring core or spring core group to the horizontal line sewing station H located behind the single-needle sewing machine head 10.

[0103] It should be understood that the single-needle sewing machine head 10 is driven by a power device to move back and forth in a straight line along the width direction of the fabric.

[0104] When the single-needle sewing machine head 10 moves along the width direction of the fabric, the fabric pressing mechanism 20 can follow the movement or remain relatively still.

[0105] On the one hand, the fabric pressing mechanism 20 can be connected to the single-needle sewing machine head 10. When the single-needle sewing machine head 10 falls and sews the horizontal line, the pressing block 22 follows the single-needle sewing machine head 10 to move along the width direction of the fabric to press the upper and lower fabrics onto the planar workbench 110.

[0106] On the other hand, the fabric pressing mechanism 20 can be arranged on the frame, and the pressing block 22 has a pressing plane; in the length direction of the pressing plane, the pressing plane extends along the fabric width direction; in the width direction of the pressing plane, the pressing plane can continue for a spring core group intergroup distance J. When the single-needle sewing machine head 10 moves along the fabric width direction, the pressing block 22 remains relatively stationary.

[0107] like Figure 3 As shown, the spring core pressing mechanism 30 includes a spring core pressing cylinder 31 and a pressing plate 32 driven by the spring core pressing cylinder 31 to move back and forth in a straight line in the vertical direction. When the single-needle sewing machine head 10 is lifted, the pressing plate 32 is lifted accordingly; after the spring core or spring core group 310 is pushed to the horizontal line sewing station H behind the single-needle sewing machine head 10 by the spring core supply device, the pressing plate 32 falls before or synchronously with the single-needle sewing machine head 10, and presses the spring core or spring core group 320 located before the horizontal line sewing station H toward the plane workbench 110, so that the spring core or spring core group 310 is sewn between the two horizontal sewing lines in a compressed state.

[0108] When the single-needle sewing machine head 10 falls and sews the horizontal lines extending along the width direction of the fabric, the pressing plate 32 remains in the falling state until the single-needle sewing machine head 10 completes sewing of the horizontal lines and is lifted upward, and then the pressing plate 32 is lifted again.

[0109] When the pressing plate 32 is in the raised position, the pressing plate 32 is away from the upper fabric; at this time, the upper fabric, the lower fabric and the spring core or spring core group 310, 320 located therebetween can be driven backward by the fabric supply device, and the vertical lines are sewn by the multi-needle sewing mechanism 40.

[0110] On the other hand, when the single-needle sewing machine head 10 moves along the width direction of the fabric, the spring core pressing mechanism 30 can follow the movement or remain relatively still.

[0111] Preferably, the spring core pressing mechanism 30 is arranged on the frame, and the pressing plate 32 has a pressing plane; in the length direction of the pressing plane, the pressing plane extends along the width direction of the fabric; in the width direction of the pressing plane, the pressing plane at least continues the inter-group distance J between two adjacent spring core groups. When the single-needle sewing machine head 10 moves along the width direction of the fabric, the pressing plate 32 remains relatively stationary.

[0112] It should be understood that the presser foot of the multi-needle sewing mechanism 40 can also flatten and press the fabric, and the needle of the multi-needle sewing mechanism passes through the fabric through the gap provided on the presser foot to sew the sewing thread on the fabric. In specific implementation, the multi-needle sewing mechanism 40 can adopt a multi-needle quilting mechanism.

[0113] It should be noted that the above fabric supply device, single-needle sewing machine head, and multi-needle sewing mechanism are all provided with a power device, so that they can operate and complete the feeding function and sewing function that have been disclosed in the prior art, which will not be repeated here.

[0114] like Figure 3 As shown, a fabric pressing mechanism 20 and a spring core pressing mechanism 30 are respectively arranged on both sides of the single-needle sewing machine head 10, so that the spring core group is compressed during transverse sewing, thereby reducing the length difference between the upper and lower layers of fabric consumed when sewing the upper and lower layers of fabric; this is conducive to making the longitudinal section of the space surrounding the spring core in the finished spring pad be Figure 5 Two approximately base-to-base isosceles trapezoids are shown, wherein the two isosceles trapezoids are connected at a stitching line 400 .

[0115] The following uses the spring pad production equipment to produce Figure 4 and Figure 5 Taking a spring pad with a width of W and a length of L as an example, the working process of the spring pad production equipment is explained.

[0116] First, determine whether the width direction or length direction of the spring pad is developed along the fabric width direction or the fabric feeding direction of the spring pad production equipment. Then, according to the distribution law of the support stiffness of the spring pad, determine the specific specifications and quantity of each spring core group in the spring pad, the specific position of the stitch (i.e., the stitching line 400), and the spacing J between two adjacent horizontal lines 410; and when producing the spring pad, the inter-group distance D between two adjacent spring core groups along the fabric feeding direction, the intra-group distance d between two adjacent spring cores along the fabric width direction, and the specific specifications and quantity of each spring core group.

[0117] It should be understood that, when producing the spring washer, the spring core groups may have a plurality of inter-group distances D, and the spring core groups may have a plurality of intra-group distances d.

[0118] According to the determined multiple inter-group distances D, intra-group distances d and specifications of the spring core, the working parameters of the spring pad production equipment are set; and the working parameters of the spring core production device are adaptively set.

[0119] The following briefly describes the working steps of the spring pad production equipment:

[0120] Step 1, equipment startup preparation. Control the single-needle sewing machine head 10 and the multi-needle sewing mechanism 40 to lift up; lead the upper and lower layers of fabric 200 from the fabric rack, pass through the bottom of the single-needle sewing machine head 10 and the multi-needle sewing mechanism 40 in the fabric feeding direction, and enter the gap between the rollers 50 after merging and aligning; and preliminarily tension the upper and lower layers of fabric.

[0121] Step 2: After the equipment is started, the fabric supply device tensions the fabric and moves it backwards; the multi-needle sewing mechanism 40 is controlled to fall, so that when the fabric continuously moves backwards, the required number of vertical lines are sewn on the fabric to test whether the position and quality of the vertical lines meet the technical requirements.

[0122] Step 3. After confirming that the multi-needle sewing mechanism 40 can work normally, the fabric feeding device stops feeding the fabric; controls the spring core pressing mechanism 30 to fall to press the fabric, and controls the fabric pressing mechanism 20 to fall to press the fabric; controls the single-needle sewing machine head 10 to fall and move along the width direction of the fabric, and sews a horizontal line 410 extending along the width direction of the fabric on the upper and lower fabrics 200.

[0123] Step 4. When the horizontal line sewing is completed, the single-needle sewing machine head 10 is controlled to lift and stop working; the spring core pressing mechanism 30 is controlled to lift, and the fabric pressing mechanism 20 is controlled to lift; the fabric feeding device feeds the fabric backwards; while the fabric is being fed, the multi-needle sewing mechanism 40 is synchronously controlled to sew vertical lines 420 extending along the length direction of the fabric on the upper and lower fabrics to separate the spring cores in the spring core group from each other.

[0124] Step 5: When it is detected that the fabric has been fed to a preset feeding length, the fabric feeding device stops feeding the fabric; the multi-needle sewing mechanism 30 is controlled to lift up, and the sewing of the vertical line 420 is ended; and

[0125] The spring core supply device delivers the spring core group arranged according to the preset intervals within the group to the horizontal line sewing station H, and returns it to the initial position; and

[0126] Control the spring core pressing mechanism 30 to fall down to press the spring core group 320 on which the horizontal lines 410 on both sides have been sewn, and the spring core group 310 on which the horizontal line 410 on the other side is to be sewn; and

[0127] Controlling the fabric pressing mechanism 20 to fall down to press the upper fabric and the lower fabric that were originally separated; and

[0128] Control the single-needle sewing machine head 10 to fall and move along the width direction of the fabric to sew horizontal lines extending along the width direction of the fabric on the upper and lower fabrics, so as to constrain the spring core group 310 in the space formed by two adjacent horizontal lines 410 extending along the width direction of the fabric;

[0129] After detecting that the single-needle sewing machine head 10 has completed sewing the horizontal thread 410 , the process proceeds to step 4 .

[0130] Then, step 4 to step 5 are repeated until the whole spring pad is sewn. After each spring pad is finished, the working parameters of the spring pad production equipment can be kept unchanged to continue to produce another spring pad of the same specification; or the working parameters of the spring pad production equipment (such as the single fabric feed length J) can be readjusted to start producing another spring pad of different specifications.

[0131] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A spring pad production equipment, characterized in that: include: A fabric supply device, used for supplying and tensioning the upper fabric and the lower fabric at intervals up and down; A spring core supply device, used for supplying the spring core between the upper fabric layer and the lower fabric layer; A fabric sewing device, used for sewing the upper fabric and the lower fabric around the spring core; The spring cores include a plurality of spring cores, which are arranged in rows along the width direction of the fabric; The fabric sewing device is used to sew the upper fabric and the lower fabric around each spring core; The fabric sewing device includes a horizontal sewing device and a vertical sewing device, which are respectively used to form a sewing line around the spring core along the fabric width direction and a sewing line along the fabric feeding direction, wherein the fabric feeding direction and the fabric width direction are perpendicular to each other in a horizontal plane; After the horizontal stitching device forms stitching lines around the spring core in the direction of the fabric width, the vertical stitching device forms stitching lines around the spring core in the direction of the fabric feeding; or In the fabric feeding direction, the horizontal stitching device is arranged before the vertical stitching device; Also includes: A spring core pressing mechanism, which is arranged behind the horizontal line sewing device and is used to press down the upper fabric layer to compress the spring core between the upper fabric layer and the lower fabric layer; the spring core pressing mechanism comprises a spring core pressing cylinder and a pressing plate driven by the spring core pressing cylinder to move back and forth in a straight line in a vertical direction, and when the pressing plate is in a raised position, the pressing plate is away from the upper fabric layer; A fabric pressing mechanism is arranged before the transverse stitching device, and is used to press the upper fabric and the lower fabric when the transverse stitching device forms a stitching line around the spring core along the fabric width direction; the fabric pressing mechanism includes a fabric pressing cylinder and a pressing block driven by the fabric pressing cylinder to move back and forth in a straight line in the vertical direction, and when the pressing block is in the raised position, it is away from the upper fabric.

2. The device according to claim 1, characterized in that The horizontal seam sewing device comprises: at least one single-needle sewing machine head, the at least one single-needle sewing machine head is arranged at intervals along the width direction of the fabric; Each of the single-needle sewing machine heads is used to form a section of stitching line around the spring along the width direction of the fabric.

3. The device according to claim 1, characterized in that The vertical stitching device comprises: at least one multi-needle sewing mechanism, wherein the at least one multi-needle sewing mechanism is arranged at intervals along the width direction of the fabric; Each of the multi-needle sewing mechanisms is used to form multiple sections of stitching lines around the spring along the fabric feeding direction, and the multiple sections of stitching lines are parallel to each other.

4. The device according to claim 1, characterized in that The interval between the upper fabric layer and the lower fabric layer is smaller than the height of the spring core in a free state; When the spring core supply device supplies the spring core to a sewing position, the spring core is pre-compressed; The fabric sewing device is used for sewing the upper fabric and the lower fabric around the pre-compressed spring core.

5. The device according to claim 1, characterized in that The fabric sewing device comprises: at least one single-needle sewing machine head, wherein the at least one single-needle sewing machine head is arranged at intervals along the width direction of the fabric; A transverse drive device for causing the at least one single-needle sewing machine head to reciprocate along the width direction of the fabric; A vertical driving device is used to make the at least one single-needle sewing machine head move back and forth along the fabric feeding direction.

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