A template for elbow pieces of a sleeve and a method for sewing seams of non-iron elbow pieces of a sleeve

Abstract

The present invention discloses an elbow piece template, comprising: a folding template group, including a base plate, an elbow patch support plate, and a hemming member disposed on one side of the base plate; the elbow patch support plate is removably disposed in a positioning through hole of the base plate, and the hemming member is used to push against the inner fold of the cut edge on the outer periphery of the elbow patch support plate, and further comprising: a seam pressing template group, including a pressing plate disposed on the other side of the base plate and a rotatable needle plate; the pressing plate is provided with a circular limiting hole, and the orthographic projection of the positioning through hole in the thickness direction of the template is located in the limiting hole; the rotatable needle plate is clamped between the folding template group and the pressing plate, the rotatable needle plate is provided with a limiting member and a needle-passing groove extending radially along the limiting hole, and the limiting member is in circumferential dynamic fit with the inner wall of the limiting hole. In the elbow piece template, the limiting member is in circumferential dynamic fit with the inner wall of the limiting hole, and the rotation of the rotatable needle plate is more smooth; the elbow piece template is beneficial to improving the sewing efficiency of the elbow piece, and improving the consistency and quality of the produced products. The present invention also discloses an iron-free elbow piece sewing method based on the elbow piece template.

Description

Technical Field

[0001] The present invention relates to the technical field of garment - making auxiliary devices, and particularly relates to an elbow patch template and an elbow patch production method. Background Art

[0002] The elbow patch is a patch that fits on the elbow part of a garment. Its function is to enhance the wear - resistance of the elbow and match the overall casual style of the garment. The shape of the elbow patch is mostly oval.

[0003] In order to improve the production efficiency of elbow patches and make the shape and sewing quality of elbow patches tend to be unified, CN109846126A discloses an elbow patch clothing template, which includes a fabric placement board, an iron - free movable board, and a combined board member for placing the elbow patch and realizing the sewing connection between the elbow patch and the fabric; in the use steps of this template, after the fabric is fixed, the presser foot of the sewing machine pushes the circular gasket to move clockwise or counter - clockwise around the middle center board between the middle center board and the middle fixed board. The small column protruding from the presser foot of the template sewing machine can extend into the first gap or the second gap, and the template sewing machine needle stitches the elbow patch and the fabric. The elbow patch seam - joining operation is as follows: First, fix the elbow fabric surface on one surface of the template. The insertion board drives the cut edge of the elbow cut piece to fold inwards. Flip the template to fit the folded edge of the elbow cut piece with the sleeve cut piece. Then, place the template in the sewing equipment and sew with a predetermined stitch.

[0004] The technical defects of the template of CN109846126A are as follows: First, an elliptical translation channel for the circular gasket to move clockwise or counter - clockwise around the middle center board is formed by the laminated structure of the fixed - plate unit and the center - board unit. The horizontal distance between the fixed - plate unit and the center - board unit is the first distance, and the first distance is determined by the interval of the circular gasket. Due to gravity, the action of flipping the template will cause a difference in the first distance between two opposite channel segments in the translation channel, that is, the arc segment of the translation channel close to the axis of rotation has a slightly smaller first distance than the arc segment of the translation channel far from the axis of rotation. Using the movement of the guide sewing machine needle to push a plurality of serially connected circular gaskets to move in the elliptical translation channel is likely to cause the sewing needle to move smoothly in the arc segment of the translation channel close to the axis of rotation, and then lead to problems such as sewing suspension or needle breakage. Second, as the use time of the template prolongs, the wear of the circular gasket and the side surface in the thickness direction of the hole wall of the middle fixed board increases, and the horizontal movement margin of the circular gasket in the translation channel is larger. This will not only further exacerbate the problem of the sewing needle moving smoothly, but also cause the width of the gap groove close to the axis of rotation to decrease, and the overall service life of the template is shorter. Summary of the Invention

[0005] One of the objectives of the present invention is to overcome the defects existing in the prior art and provide an elbow piece template. During the sewing process, the sewing needle drives the rotatable needle plate to rotate in the limit hole, and the dynamic friction between the rotatable needle plate and the limit hole is small, solving problems such as interrupted sewing and broken needles caused by friction.

[0006] To achieve the above technical effects, the technical solution of the present invention is: an elbow piece template, comprising:

[0007] A folding template group, including a base plate, a sleeve patch support plate, and a hemming member disposed on one side of the base plate; the sleeve patch support plate is removably disposed in the positioning through hole of the base plate, and the hemming member is used to push against the inner fold of the cut edge on the outer periphery of the sleeve patch support plate. It further includes:

[0008] A seam pressing template group, including a pressing plate and a rotatable needle plate disposed on the other side of the base plate;

[0009] The pressing plate is provided with a circular limit hole, and the orthographic projection of the positioning through hole in the template thickness direction is located in the limit hole; the rotatable needle plate is clamped between the folding template group and the pressing plate. The rotatable needle plate is provided with a limiting member and a needle passing groove extending radially along the limit hole, and the limiting member is in circumferential dynamic cooperation with the inner wall of the limit hole.

[0010] Preferably, the limiting member is disposed in the limit hole, and the side surface of the limiting member is in circumferential dynamic cooperation with the inner wall of the limit hole.

[0011] Preferably, the center of the limit hole coincides with the center of the positioning through hole in the template thickness direction.

[0012] Preferably, the limiting member is bow-shaped or circular, and both ends of the needle passing groove close to and far from the center of the limit hole penetrate through the limiting member.

[0013] Preferably, the limiting member is bow-shaped, the end of the needle passing groove close to the center of the limit hole is spaced from the chord side of the limiting member, and the limiting members are disposed on both sides of the needle passing groove.

[0014] Preferably, the base plate includes a backing plate and a cover plate provided with a through positioning through hole. An insertion plate layer is clamped between the backing plate and the cover plate. The hemming member is disposed in the insertion plate layer, and the insertion plate layer is further provided with a guiding groove for guiding the hemming member to translate within the insertion plate layer.

[0015] Preferably, the sleeve patch support plate is composed of N unit support plates spliced flatly, N is greater than or equal to 3; the unit support plates are divided along the connection lines of N points from the middle point to the edge of the sleeve patch support plate and in the thickness direction, and the central angle of the unit support plate is less than 180°.

[0016] Preferably, a height compensation member is provided on the rotatable needle plate, and the height compensation member and the limiting member are arranged at the same height in the circular limiting hole.

[0017] The second object of the present invention is to provide a method for sewing the seams of a non-ironing elbow piece. Based on the above elbow piece template, the method includes the following steps:

[0018] S1. Cover the elbow piece cut on the substrate, press the elbow piece cut in the positioning through hole with the elbow piece support plate, push the hemming member flat along the first direction until the cut edge outside the elbow piece support plate is folded inwards, remove the elbow piece support plate, cover the elbow piece template on the sleeve cut, and reset the hemming member along the reverse direction of the first direction;

[0019] S2: Align the needle insertion groove with the sewing machine needle of the sewing equipment, and the sewing needle drives the rotatable needle plate to rotate and move for sewing in the needle insertion groove with a predetermined elbow piece stitch.

[0020] Preferably, the presser foot of the sewing equipment presses against the rotatable needle plate.

[0021] The advantages and beneficial effects of the present invention are as follows:

[0022] In the elbow piece template, the limiting member and the inner wall of the limiting hole are in circumferential dynamic fit, and the dynamic fit arc angle is always the same, so the rotation of the rotatable needle plate is smoother; due to the limiting effect of the limiting member, the displacement of the rotatable needle plate relative to the limiting hole is small before and after flipping the template, and the displacement of the rotatable needle plate can be adaptively adjusted by the sewing needle executing a predetermined elliptical stitch in the needle insertion groove;

[0023] The elbow piece template is beneficial to improving the sewing efficiency of the elbow piece and improving the consistency and yield rate of production quality;

[0024] Since the sewing needle adaptively adjusts the interaction force between the rotatable needle plate and the inner wall of the limiting hole, the dynamic friction force between the limiting member and the inner wall of the limiting hole is in a small range. Therefore, after long-term use, the wear of the rotatable needle plate and the inner wall of the limiting hole is small, and the service life of the mold is long;

[0025] Based on replacing the folding template group, the elbow piece template is applicable to producing elbow pieces of different sizes. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the folding template group of the elbow piece template;

[0027] Figure 2 It is a schematic structural diagram of the folding template group of the elbow piece template with the elbow piece support plate removed;

[0028] Figure 3 It is a schematic structural diagram of the front side of the stacked structure of the elbow piece template;

[0029] Figure 4 It is a schematic structural view of the back of the template layer stacking structure of the sleeve elbow piece;

[0030] Figure 5 It is a schematic structural view of the seam pressing template group of the sleeve elbow piece template;

[0031] Figure 6 It is a schematic structural view of the pressing plate in the embodiment;

[0032] Figure 7 It is a schematic structural view of the backing plate in the embodiment;

[0033] Figure 8 It is a schematic structural view of the assembly of the fixing part and the hemming part on the same layer as the template in the embodiment;

[0034] Figure 9 It is a schematic structural view of the cover plate in the embodiment;

[0035] In the figure: 1. Folding template group; 11. Substrate; 111. Backing plate; 112. Cover plate; 113. Fixing part; 12. Sleeve patch support plate; 121. Unit support plate; 13. Hemming part; 101. Positioning through hole;

[0036] 2. Seam pressing template group; 21. Pressing plate; 211. Limit hole; 22. Rotatable needle plate; 221. Limiting part; 222. Needle passing groove; 223. Height compensation part. Detailed implementation manners

[0037] The following combines the embodiments to further describe the detailed implementation manners of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and cannot be used to limit the protection scope of the present invention.

[0038] In the description of the present application, it should be noted that unless otherwise stated, the meaning of "a plurality" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0039] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Embodiment

[0040] As shown in Figure 1 , 4 , and 6, the elbow piece template of the embodiment includes a stacked folding template group 1 and a seam pressing template group 2; the folding template group 1 includes a base plate 11, an elbow patch support plate 12, and a hemming member 13 provided on one side of the base plate 11; the elbow patch support plate 12 is removably disposed in the positioning through hole 101 of the base plate 11, and the hemming member 13 is used to push against the inner fold of the cut edge on the outer periphery of the elbow patch support plate 12. It further includes: the seam pressing template group 2 includes a pressing plate 21 provided on the other side of the base plate 11 and a rotatable needle plate 22; the pressing plate 21 is provided with a circular limiting hole 211, and the orthographic projection of the positioning through hole 101 in the template thickness direction is located in the limiting hole 211; the rotatable needle plate 22 is clamped between the folding template group 1 and the pressing plate 21, and the rotatable needle plate 22 is provided with a limiting member 221 and a needle passing groove 222 extending radially along the limiting hole 211, and the limiting member 221 is in circumferential moving fit with the inner wall of the limiting hole 211.

[0041] Optionally, the stacking between the folding template group 1 and the seam pressing template group 2 is a detachable fixed connection, for example, assembled and stacked by magnetic attracting members, or an inseparable fixed connection, including but not limited to bonding the folding template and the pressing plate 21. When fixing the elbow cut piece in the folding template group 1, as shown in Figure 3 , the front surface of the elbow piece template is located at the top; when sewing the elbow cut piece to the sleeve cut piece, as shown in Figure 4 , the back surface of the elbow piece template is located at the top.

[0042] The rotatable needle plate 22 is circular, and the edge of the circular rotatable needle plate 22 is clamped between the folding template group 1 and the pressing plate 21, and the surface of the rotatable needle plate 22 facing away from the folding template group 1 is partially exposed in the limiting hole 211. The predetermined sewing stitch that the sewing needle of the sewing equipment needs to execute in the needle passing groove 222 is a closed elliptical ring. Therefore, the limiting member 221 must rotate at least 360° in the limiting hole 211. The function of the limiting member 221 is to guide the rotation of the rotatable needle plate 22. Optionally, the limiting member 221 is provided on a partial surface of the above part exposed in the limiting hole 211, or on the outer edge of the part exposed in the limiting hole 211, for example, in concave-convex fit with the groove of the pressing plate 21 (an annular groove whose bottom does not penetrate the thickness direction of the pressing plate 21) through an extension arm. The moving fit can be a sliding fit and a rolling fit. Since the template is mostly produced by sheet materials, the sliding fit is mostly used between the side surfaces of the sheet materials.

[0043] As shown in Figure 5-6 , in one embodiment, the limiting member 221 is provided in the limiting hole 211, and the side surface of the limiting member 221 is in circumferential moving fit with the inner wall of the limiting hole 211. In the figure, the lateral arc surface of the limiting member 221 is in circumferential moving fit with the inner wall of the limiting hole 211. The lateral arc surface is coaxial with the limiting hole 211, and the radius of the lateral arc surface is slightly smaller than the inner diameter of the limiting hole 211 to reduce the in-plane movement amount of the rotatable needle plate 22 relative to the pressing plate 21.

[0044] As Figure 5 shown, in another embodiment, the center of the limiting hole 211 coincides with the center of the positioning through hole 101 along the thickness direction of the template. If the center of the limiting hole 211 does not coincide with the center of the positioning through hole 101, the sewing needle for performing a predetermined stitch needs to use a needle-passing slot 222 with a longer radial length. During the sewing process, the movement amount of the sewing needle in the needle-passing slot 222 is larger, and the change amplitude of the torque for driving the rotatable needle plate 22 by the sewing needle is relatively large; conversely, the movement amount of the sewing needle in the needle-passing slot 222 is equal to half of the difference between the major axis and the minor axis of the elliptical stitch, and the change amplitude of the torque for driving the rotatable needle plate 22 by the sewing needle is relatively small, which is beneficial to maintaining the normal service life of the sewing needle.

[0045] As Figure 3-5 shown, in another embodiment, the limiting member 221 is bow-shaped, and both ends of the needle-passing slot 222 close to and away from the center of the limiting hole 211 penetrate through the limiting member 221. The inner folded edge width of the elbow piece is usually 1 cm or even smaller, and the inner folded edge of the elbow cut piece is easily turned outwards. Therefore, in traditional production, the inner folded edge needs to be ironed and then sewn. The sewing equipment has a presser foot, and the presser foot presses on both sides of the needle-passing slot 222, that is, presses on the limiting member 221. The rotatable needle plate 22 applies a downward pressing force to the elbow piece, which can further fix the inner folded state of the cut edge. The limiting member can be set as a perfect circle with a radius slightly smaller than that of the limiting hole 211.

[0046] As Figure 5 shown, in another embodiment, the end of the needle-passing slot 222 close to the center of the limiting hole 211 is spaced from the chord side of the limiting member 221, and the limiting members 221 are disposed on both sides of the needle-passing slot 222. Compared with other parts of the relatively thin rotatable needle plate 22, the limiting member 221 (the thickened bow-shaped part of the rotatable needle plate 22) has greater rigidity, and can apply a downward pressing force to the inner folded edge to be sewn, the inner folded edge that has been sewn, and the middle part of the elbow piece, which can further shape the elbow piece and optimize the no-iron effect of the elbow piece. The bow shape includes but is not limited to a parabolic bow shape and a perfect circle bow shape. Comparatively speaking, the perfect circle bow shape has the largest downward pressing surface. In the figure, the bow-shaped limiting member is a perfect circle bow shape, and the corresponding central angle is less than 180°. Compared with the perfect circle limiting member 221 (with a radius slightly smaller than that of the limiting hole 211), the overall self-weight of the rotatable needle plate 22 is smaller, and the impact on the inner wall of the limiting hole 211 of the same material during the process of folding the template is small, which is beneficial to reducing the deformation of the pressing plate 21, the substrate, etc. and reducing the breakage probability. Further, the limiting members 221 are symmetrically arranged with the needle-passing slot 222 as the axis of symmetry.

[0047] As Figure 1-2, as shown in FIGS. 7-9, in another embodiment, the substrate 11 includes a backing plate 111 and a cover plate 112 provided with through positioning through holes 101. An insertion plate layer is clamped between the backing plate 111 and the cover plate 112. The hemming member 13 is inserted into the insertion plate layer, and the insertion plate layer is further provided with a guiding groove for guiding the hemming member 13 to translate within the insertion plate layer. In the figure, two insertion plates are symmetrically arranged, and the central angle of the arc edge of the cuff sticker support plate 12 covered by a single insertion plate is equal to or slightly less than 180°. Further, the number of insertion plates can also be more than three. In the figure, the insertion plate layer includes a fixing portion 113, and the fixing portion fixes the backing plate 111 and the cover plate 112. The guiding groove is formed by the relative plate surfaces of the backing plate 111 and the cover plate 112 and the plate thickness side surfaces of the fixing portion 113. The backing plate 111 is composed of two unit backing plates stacked together.

[0048] As Figure 1 shown, in another embodiment, the cuff sticker support plate 12 is composed of N unit support plates 121 spliced flatly, where N is greater than or equal to 3; the unit support plates 121 are divided along the connection lines from a point in the middle of the cuff sticker support plate 12 to N points on the edge and in the thickness direction, and the central angle of the unit support plate 121 is less than 180°. In the figure, the central angle of the unit support plate 121 is less than 150°. In the figure, the dividing surface of the unit support plate 121 is determined by the connection lines from the center of the cuff sticker support plate 12 to N points on the edge and in the thickness direction. The iron-free movable plate described in CN109846126A can be used as an equivalent substitute for the cuff sticker support plate 12, and both can fix the cuff sticker shape and assist in inner folding of the trimmed edge. When the edge of the cuff elbow piece is clamped between the insertion plate and the cuff sticker support plate 12, first lift one end of the central angle α of the unit support plate 121, and then the arc edge of the unit support plate 121 slowly exits the above clamping structure, while the inner folded edge remains in contact with the insertion plate. The above operation process is conducive to maintaining the inner folded state of the edge of the cuff elbow piece. In contrast, the iron-free movable plate in CN109846126A is randomly placed at the scissor opening. During the process of flattening and pressing the fabric, the scissor opening is likely to clamp the fabric, especially for thin and light fabrics. When the iron-free movable plate is lifted, the scissor opening deforms, and the sheet material of the template itself has an elastic deformation recovery force. The sheet material at the scissor opening abuts against the inner fold, and the inner folded edge is taken out from between the insertion plate and the iron-free movable plate, destroying the inner folded state of the edge of the cuff elbow piece and increasing the rework probability of the inner fold of the edge of the cuff elbow piece.

[0049] As Figure 4 shown, in another embodiment, the rotatable needle plate 22 is provided with a height compensating member 223, and the height compensating member 223 is arranged at the same height as the limiting member 221 in the circular limiting hole 211. The height compensating member 223 can be selected as a lightweight material such as foam, which is beneficial to reducing the self-weight of the rotatable needle plate 22, ensuring the flatness of the overall template, facilitating the production of a flat cuff elbow piece, and making the fabric tension on the inner folded edge of the cuff elbow piece tend to be consistent and the edge smooth.

[0050] The sewing method of the iron-free cuff elbow piece is based on the cuff elbow piece template of the above embodiment and includes the following steps:

[0051] S1. The elbow piece is placed on the substrate 11. The elbow piece is pressed by the elbow piece support plate 12 in the positioning through hole 101. The hemming piece 13 is pushed flat along the first direction until the cut edge outside the elbow piece support plate 12 is folded inwards. The elbow piece support plate 12 is removed. The elbow piece template is covered on the sleeve piece. The hemming piece 13 is reset along the reverse direction of the first direction;

[0052] S2: Align the needle threading groove 222 with the sewing machine needle of the sewing equipment. The sewing needle drives the rotatable needle plate 22 to rotate and move for sewing in the needle threading groove 222 along a predetermined elbow piece stitch.

[0053] The presser foot of the sewing equipment presses against the rotatable needle plate 22. Further, the presser foot presses against the limiting member 221. Furthermore, the sewing thread of the sewing equipment starts from one end of the long axis of the oval elbow piece and sews clockwise or counterclockwise. The inward folding deformation of the inner folding edge at one end of the long axis of the oval elbow piece is larger than that at the short axis end. It is preferred to sew the long axis end first. On the other hand, since one end of the long axis is on the sleeve seam splicing seam, starting from the long axis end for sewing is convenient for alignment and can prevent the elbow piece from shifting during production.

[0054] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A sleeve elbow piece template, comprising: A folding template group, including a base plate, a sleeve patch support plate, and a hemming member disposed on one side of the base plate; the sleeve patch support plate is removably disposed in the positioning through hole of the base plate, and the hemming member is used to push the inner fold of the cut edge on the outer periphery of the sleeve patch support plate, characterized in that it further includes: A seam pressing template group, including a pressing plate and a rotatable needle plate disposed on the other side of the base plate; The pressing plate is provided with a circular limiting hole, and the orthographic projection of the positioning through hole in the template thickness direction is located in the limiting hole; the rotatable needle plate is clamped between the folding template group and the pressing plate, and the rotatable needle plate is provided with a limiting member and a needle passing groove extending radially along the limiting hole, The limiting member is disposed in the limiting hole, and the side surface of the limiting member is in circumferential dynamic fit with the inner wall of the limiting hole; the center of the limiting hole coincides with the center of the positioning through hole in the template thickness direction.

2. The sleeve elbow piece template according to claim 1, characterized in that, The limiting member is arcuate or circular, and both ends of the needle passing groove close to and away from the center of the limiting hole penetrate through the limiting member.

3. The sleeve elbow piece template according to claim 2, characterized in that, The limiting member is arcuate, the end of the needle passing groove close to the center of the limiting hole is spaced from the chord side of the limiting member, and the limiting members are respectively disposed on both sides of the needle passing groove.

4. The sleeve elbow piece template according to claim 1, characterized in that, The base plate includes a backing plate and a cover plate provided with a through positioning through hole, an insertion plate layer is clamped between the backing plate and the cover plate, the hemming member is disposed in the insertion plate layer, and the insertion plate layer is further provided with a guiding groove for guiding the hemming member to translate within the insertion plate layer.

5. The sleeve elbow piece template according to claim 1, characterized in that, The sleeve patch support plate is composed of N unit support plates spliced flatly, N is greater than or equal to 3; the unit support plates are divided along the connection lines of N points from the middle point of the sleeve patch support plate to the edge and in the thickness direction, and the central angle of the unit support plate is less than 180°.

6. The sleeve elbow piece template according to claim 1, characterized in that, The rotatable needle plate is provided with a height compensation member, and the height compensation member is disposed in the circular limiting hole at the same height as the limiting member.

7. A sewing method for a non-ironing sleeve elbow piece, characterized in that, Based on the sleeve elbow piece template according to any one of claims 1 to 6, it includes the following steps: S1. Cover the sleeve elbow cut piece on the base plate, press and connect the sleeve patch support plate with the sleeve elbow cut piece in the positioning through hole, push the hemming member flatly along the first direction until the cut edge on the outer periphery of the sleeve patch support plate is folded inward, remove the sleeve patch support plate, cover the sleeve elbow piece template on the sleeve cut piece, and reset the hemming member along the reverse direction of the first direction; S2: Align the needle passing groove with the sewing machine needle of the sewing equipment, and the sewing needle drives the rotatable needle plate to rotate and move for sewing in the needle passing groove along a predetermined sleeve elbow piece stitch.

8. The sewing method for a non-ironing sleeve elbow piece according to claim 7, characterized in that, The presser foot of the sewing equipment presses against the rotatable needle plate.

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