Novel movable type lower shrinking and wrinkling assembly of lockstitch sewing machine

Abstract

The utility model relates to a clothing sewing appliance, in particular to a novel movable lower shrinking and wrinkling assembly of a lockstitch sewing machine. The utility model aims to provide a novel movable lower shrinking and wrinkling assembly of a lockstitch sewing machine, which has the functions of shrinking and sewing simultaneously, and has the characteristics of simple structure and convenience in use. According to the technical scheme, the movable lower shrinking and wrinkling assembly of the novel lockstitch sewing machine comprises a sewing needle driven by a sewing mechanism and a presser foot fixed to a presser foot rod. The wrinkling assembly is characterized in that the wrinkling assembly further comprises a fixing frame fixed to the working table, a swing arm located on the fixing frame in a swing mode, an adjusting support movably located on the swing arm and a wrinkling piece installed at the front end of the adjusting support, and the wrinkling piece is located above the feed dog.

Description

TECHNICAL FIELD

[0001] The utility model relates to clothing sewing appliance, concretely is a new type of flat sewing machine movable lower shrinkage component. BACKGROUND

[0002] In the field of garment production, especially in the production process of fashion fabric, a shrinkage process is needed. This process requires sewing and assembling one layer of fabric with another layer of shrunk fabric.

[0003] There is a presser foot for shrinkage process on the market at present, but there is a certain difficulty in the process of shrinkage and sewing at the same time using this presser foot. Workers often have to process the shrunk fabric first and then sew and assemble it with another fabric, which adds an extra processing procedure. The extra processing procedure increases the production cost and the probability of rework, therefore, it is necessary to design a shrinkage component integrating shrinkage and sewing. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming the defects in the above background technology, providing a new type of flat sewing machine movable lower shrinkage component, which should have the functions of simultaneous shrinkage and sewing, simple structure and convenient use.

[0005] The technical scheme of the utility model is:

[0006] A new type of flat sewing machine movable lower shrinkage component, comprising a sewing needle driven by a sewing mechanism and a presser foot fixed on a presser foot rod, characterized in that: the shrinkage component further comprises a fixed frame fixed on a workbench plate, a swing arm pivotally positioned on the fixed frame, an adjusting bracket movably positioned on the swing arm, and a shrinkage sheet installed at the front end of the adjusting bracket, wherein the shrinkage sheet is located above the feed dog.

[0007] The bottom surface and the top surface of the shrinkage sheet maintain an included angle.

[0008] The front and rear edges of the adjusting bracket are each provided with a vertical downwardly folded baffle, so that the adjusting bracket can be movably embedded on the upper surface of the swing arm.

[0009] An adjusting groove is provided on the adjusting bracket; an adjusting screw is screwed into the adjusting groove and cooperates with the swing arm to fix the adjusting bracket on the swing arm.

[0010] Two parallel fixing grooves are provided on the fixed frame; the fixing grooves can fix the fixed frame on the workbench of the flat sewing machine by screwing in bolts.

[0011] The utility model has the advantages of:

[0012] 1. The shrinkage and sewing procedures are combined into one, simplifying the production process.

[0013] 2、 The utility model discloses simple component structure, convenient to use, improve production efficiency.

[0014] 3、 The utility model discloses applicable to most market fabrics, and the range of application is wider. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the front view structural schematic diagram of the utility model embodiment.

[0016] Figure 2 It is Figure 1 The top view structural schematic diagram of the embodiment (for showing clear, the left and right of presser foot and the wrinkle sheet are moved apart).

[0017] Figure 3 It is Figure 1 The bottom view structural schematic diagram of the embodiment (for showing clear, the left and right of presser foot and the wrinkle sheet are moved apart).

[0018] Figure 4 It is Figure 1 The working principle schematic diagram of the embodiment one.

[0019] Figure 5 It is Figure 1 The working principle schematic diagram of the embodiment two.

[0020] Markings:

[0021] Wrinkle sheet 1, presser foot 2, guide hole 2.1, adjusting support 3, adjusting groove 3.1, baffle 3.2, swing arm 4, fixed frame 5, fixed groove 5.1, sewing needle 6, feed dog 7, rivet 8, flat bed surface 9. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is combined with the drawing and embodiment, and the utility model is further explained in detail. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0023] In the drawing, the front direction of the fabric (the left side of the work) is front; Figure 1

[0024] As Figures 1-3 Shown, a new type of flat bed movable down wrinkle assembly, including the sewing needle 6 driven by the sewing mechanism (the sewing mechanism is arranged on the flat bed head) and the presser foot 2 fixed on the presser foot rod;Flat bed still is equipped with feed dog 7 on the platform;This is similar to the existing flat bed.

[0025] ​The improvement of this utility model is that the lower gathering assembly further includes a gathering piece 1, a presser foot 2, an adjusting bracket 3, a swing arm 4, and a fixing frame 5. The fixing frame is horizontally arranged on the surface 9 of the flat sewing machine table.

[0026] The fixing frame has two fixing grooves parallel to the front and back direction, and bolts can be screwed in to fix the fixing frame to the worktable of the flat sewing machine; the right end of the fixing frame has a connecting hole.

[0027] The right end of the swing arm is provided with a rotating hole. After the rivet 8 is inserted into the rotating hole, it is hinged to the connecting hole of the fixed frame, so that the swing arm can be swayed and positioned on the fixed frame. When processing is required, the swing arm can be opened counterclockwise to facilitate pressing in new fabric.

[0028] The front and rear edges of the adjusting bracket are each provided with vertically downward folded baffles 3.2, allowing the adjusting bracket to fit into the upper surface of the swing arm, and along the length direction of the swing arm (i.e., Figure 1 The adjustment bracket is also provided with an adjustment groove 3.1. The adjustment groove is screwed into the adjustment screw that cooperates with the swing arm. Tightening the adjustment screw will fix the adjustment bracket on the swing arm.

[0029] The pleating sheet is soldered to the left end of the adjusting bracket and covers the feed dog 7 of the worktable. The pleating sheet is provided with a connection to the sewing needle 6 (such as...). Figure 4 (As shown) The guide groove 1.1 is matched; the upper and lower sides of the pleated piece are rounded at the connection with the adjustment bracket to avoid damaging the fabric to be processed; in the direction of fabric advance, the top and bottom surfaces of the pleated piece maintain an angle (preferably 10-30 degrees); the upper and lower layers of fabric pass through the top and bottom surfaces of the pleated piece respectively, and are then sewn by a sewing needle.

[0030] like Figure 4 and Figure 5 As shown, during operation, the feed dog moves in an elliptical cycle driven by the feed mechanism. The upper half of the cycle protrudes from the feed groove of the worktable and directly acts on the fabric for driving (the distance the fabric is driven forward is called the drive stroke). The lower half of the cycle sinks into the feed groove of the worktable and separates from the fabric. After installing the pleating plate, the feed dog is located below the pleating plate for most of the drive stroke, only contacting the lower layer of fabric; it only protrudes from the front of the pleating plate at the end of the drive stroke (approximately one-quarter to one-fifth of the drive stroke), simultaneously contacting both the upper and lower layers of fabric. Therefore, each time the two layers of fabric are driven by the frictional force of the feed dog 7, the lower layer of fabric located on the bottom surface of the pleating plate can advance the entire drive stroke distance L2, while the upper layer of fabric located on the top surface of the pleating plate can only advance a small distance L1 together with the lower layer of fabric at the end of the drive stroke. Due to the difference in the advancing distance between the upper and lower layers of fabric, the lower layer of fabric automatically forms a pleat at the sewing point of the flat sewing machine.

[0031] The presser foot is provided with a guide hole 2.1 which is matched with the guide groove in up-down direction, and the sewing needle is inserted into the guide hole; the upper end of the presser foot is provided with a connecting groove which is connected with the presser foot rod of the lockstitch machine.

[0032] Working principle:

[0033] 1. As shown in the figure, the fabric to be crimped is placed below the crimping sheet, and the assembled fabric matched with the fabric to be crimped is placed above the crimping sheet; Figure 4

[0034] 2. As shown in the figure, after the fabric is aligned, the presser foot is moved to press the fabric, and the lockstitch machine is started; Figure 5

[0035] 3. As shown in the figure, under the action of the feed dog 7 each time, the lower fabric to be crimped obtains a forward moving distance L2, and the upper assembled fabric obtains a shorter distance L1 under the action of the friction force of the fabric to be crimped; Figure 5

[0036] 4. Because the feeding distances are different, the lower fabric to be crimped is automatically crimped at the sewing position of the lockstitch machine, and is sewn with the upper fabric by the sewing needle, and each time the sewing is output from the lockstitch machine with the distance L1.

[0037] The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms, and is not limited to the embodiments described in the specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.​​​

Claims

1. A novel movable lower gathering assembly for a flat sewing machine, comprising a sewing needle (6) driven by a sewing mechanism and a presser foot (2) fixed to a presser foot bar; characterized in that: The crimping assembly also includes a fixed frame (5) fixed to the workbench, a swing arm (4) swayably positioned on the fixed frame, an adjustment bracket (3) movably positioned on the swing arm, and a crimping piece (1) mounted on the left end of the adjustment bracket, the crimping piece being located above the feed dog.

2. The novel movable lower gathering and pleating assembly for a flat sewing machine according to claim 1, characterized in that: The swing arm is hinged and can be swayably positioned on the fixed frame.

3. A novel movable lower gathering and pleating assembly for a flat sewing machine according to claim 2, characterized in that: The bottom and top surfaces of the wrinkled sheet maintain an angle.

4. A novel movable lower gathering and pleating assembly for a flat sewing machine according to claim 3, characterized in that: The front and rear edges of the adjustment bracket are provided with vertically downward folded baffles (3.2), which allow the adjustment bracket to be movably fitted into the upper surface of the swing arm.

5. A novel movable lower gathering and pleating assembly for a flat sewing machine according to claim 4, characterized in that: The adjusting bracket is provided with an adjusting groove (3.1); the adjusting screw is screwed into the adjusting groove to fix the adjusting bracket on the swing arm.

6. A novel movable lower gathering and pleating assembly for a flat sewing machine according to claim 5, characterized in that: The fixing frame is provided with two fixing grooves (5.1); the fixing frame can be fixed to the worktable of the flat sewing machine by screwing in the fixing grooves with bolts.

Images