Upright column type flat seaming machine

Abstract

The utility model discloses a stand column type flat seaming machine, which relates to the technical field of sewing equipment and comprises a base, a stand column vertically arranged on the base and a machine head connected to the stand column, an upper shaft is arranged in the machine head, a lower shaft parallel to the upper shaft is arranged in the base, a motor used for driving the upper shaft and the lower shaft to rotate is arranged in the stand column, and a cylindrical seat is vertically arranged on the base. A sewing platform used for placing cloth is arranged at the top end of the cylindrical seat, an auxiliary cloth feeding assembly is hinged to the end, away from the stand column, of the machine head with the length direction of the base as the left-right direction, and the auxiliary cloth feeding assembly is located above the cylindrical seat. The first eccentric wheel is connected with a swing assembly used for driving the auxiliary cloth feeding assembly to reciprocate front and back. The upper shaft is sleeved with a second eccentric wheel, the second eccentric wheel is connected with a lifting assembly used for driving the auxiliary cloth feeding assembly to move up and down in a reciprocating mode so as to be close to or far away from the sewing platform, and the problem that the stitch length is uneven due to staggered layers of cloth can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing equipment, in particular to a column-type interlock sewing machine. Background Art

[0002] The interlock sewing machine is also called a special sewing machine. The stitches it sews are chain sewing stitches, which are mostly used for rolled collars, hems, folded edges, interlock seams, splicing seams and trims on knitted garments.

[0003] The existing column-type interlock sewing machine includes a sewing body, a needle bar mechanism, a presser foot mechanism, a curved needle mechanism and a cloth feeding mechanism, wherein the sewing body includes a machine head, a pillar and a base, a rotating upper shaft is provided inside the machine head, a lower shaft parallel to the upper shaft is provided inside the base, and the upper shaft and the lower shaft are driven by the cooperation of a motor, a transmission belt and a pulley, a column seat is vertically provided on the base, a needle plate located below the needle bar mechanism is installed at the highest point of the column seat, and a plurality of needle holes are formed on the needle plate. The needle bar mechanism has a plurality of needles, each of which corresponds to one of the needle holes of the needle plate, and the needle bar mechanism is connected to the upper shaft of the sewing body, so that the upper shaft can drive a plurality of needles to pass through the needle holes when rotating, and the presser foot mechanism has a presser foot located on one side of the plurality of needles, and the presser foot can approach or move away from the needle plate.

[0004] The bending needle mechanism is located inside the columnar seat of the sewing body. The bending needle mechanism has a bending needle. The bending needle mechanism is connected to the lower shaft of the sewing body, so that when the lower shaft is driven by the upper shaft to rotate, it can drive the bending needle to swing, and then the bending needle can cooperate with multiple machine needles to produce a thread hooking movement, so that a bottom line passed through the bending needle can be interwoven with multiple needle threads passed through the machine needles.

[0005] Feed through holes are opened on both sides of the needle hole on the cylindrical needle plate, and feed teeth are arranged in the feed through holes. The feed teeth are connected to the lower shaft of the sewing body, and then moved back and forth and up and down in the feed channel under the drive of the lower shaft. Its approximately elliptical circular motion completes the feeding with the cooperation of the presser foot.

[0006] However, when the presser foot and feed dog cooperate in the sewing process, the feeding action is completed by the feed dog, which results in the lower layer of fabric being fed quickly and the upper layer of fabric being fed slowly, and it is easy for the upper and lower layers of fabric to be misaligned, resulting in problems such as uneven needle sizes and stitch lengths.

[0007] Therefore, the inventor conducted in-depth research on the above-mentioned issues, which led to the creation of this case. Utility Model Content

[0008] The utility model provides a column type interlock sewing machine, aiming to solve the problems of the existing interlock sewing machine feed dog being prone to the misalignment of upper and lower layers of fabric during the fabric feeding process, and being prone to uneven size of needles and needle distances.

[0009] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0010] A column-type interlock sewing machine comprises a base, a column vertically arranged on the base and a machine head connected to the column, an upper shaft is arranged in the machine head, a lower shaft parallel to the upper shaft is arranged in the base, a motor for driving the upper shaft and the lower shaft to rotate is arranged in the column, a presser foot mechanism connected to the upper shaft in transmission is arranged at one end of the machine head away from the column, a columnar seat is vertically arranged on the base, a cloth feeding mechanism connected to the lower shaft in transmission is arranged in the columnar seat, an auxiliary cloth feeding assembly is hinged at one end of the machine head away from the column with the length direction of the base as the left and right direction, and the auxiliary cloth feeding assembly is located above the columnar seat, the lower shaft sleeve is provided with a first eccentric wheel, and the first eccentric wheel is connected to a swinging assembly for driving the auxiliary cloth feeding assembly to reciprocate back and forth; the upper shaft sleeve is provided with a second eccentric wheel, and the second eccentric wheel is connected to a lifting assembly for driving the auxiliary cloth feeding assembly to reciprocate up and down so as to approach or move away from a sewing platform.

[0011] Furthermore, a mounting block is provided at the right end of the above-mentioned machine head, a limit block is locked below the above-mentioned mounting block, and there is a gap between the limit block and the machine head; the above-mentioned auxiliary cloth feeding assembly includes a triangular arm, one end of the above-mentioned triangular arm is hinged to the above-mentioned mounting block, and the other end located on the same straight line is hinged to a connecting arm which is vertically arranged and passes through the above-mentioned gap, a driven arm is provided on the right side of the free end of the above-mentioned connecting arm, a groove is recessed at the top end of the above-mentioned driven arm, and the above-mentioned groove is located below the above-mentioned limit block, and the bottom end of the above-mentioned driven arm is locked and connected with the auxiliary cloth feeding.

[0012] Furthermore, the above-mentioned swing assembly includes a first connecting rod that passes through the column and is sleeved on the first eccentric wheel, a second connecting rod hinged at the other end of the first connecting rod, a first bearing seat and a second bearing seat that are fixedly arranged on the front side wall of the machine head and are arranged in a straight line at intervals, a first rotating shaft that passes through the first bearing seat and the second bearing seat respectively, and a fixed seat located below the above-mentioned second bearing seat, the free end of the above-mentioned second connecting rod is sleeved on one end of the above-mentioned first rotating shaft that passes through the first bearing seat, the end of the above-mentioned first rotating shaft that passes through the second bearing seat is sleeved with a vertically arranged third connecting rod, the free end of the above-mentioned third connecting rod is locked and connected with a swing fork, the above-mentioned swing fork is hinged on the above-mentioned fixed seat, the bottom end of the swing fork is locked and connected with a first transmission arm arranged along the front-back direction, and the free end of the above-mentioned first transmission arm is locked and connected with the above-mentioned driven arm.

[0013] Furthermore, the lifting assembly includes a fourth connecting rod passing through the machine head and sleeved on the second eccentric wheel, a locking block locked and connected to the other end of the fourth connecting rod, a third bearing seat and a fourth bearing seat fixedly arranged on the front side wall of the machine head and arranged in a straight line at intervals, and a second rotating shaft respectively passing through the third bearing seat and the fourth bearing seat, a locking sleeve is provided on the top of the locking block, the locking sleeve is locked by bolts to one end of the second rotating shaft passing through the third bearing seat, one end of the second rotating shaft passing through the fourth bearing seat is sleeved with a fifth connecting rod, the free end of the fifth connecting rod is locked and connected to a second transmission arm arranged along the front and rear directions, and the free end of the second transmission arm is locked and connected to the top end of the triangular arm.

[0014] Furthermore, a first clearance groove for the first connecting rod to pass through is formed on the front side wall of the column; and a second clearance groove for the fourth connecting rod to pass through is formed on the front side wall of the machine head.

[0015] Furthermore, the auxiliary cloth feeding mechanism is provided with a receiving groove for receiving a presser foot in the presser foot mechanism.

[0016] From the above description of the structure of the utility model, it can be seen that the utility model has the following advantages:

[0017] The utility model has an auxiliary cloth feeding assembly on the machine head, and a first eccentric wheel and a second eccentric wheel are respectively sleeved on the lower shaft and the upper shaft, wherein the first eccentric wheel is connected with a swing assembly for driving the auxiliary cloth feeding assembly to reciprocate forward and backward, and the second eccentric wheel is connected with a lifting assembly for driving the auxiliary cloth feeding assembly to reciprocate up and down so as to approach or move away from the sewing platform. Driven by the swing assembly and the lifting assembly, the auxiliary cloth feeding assembly can press down, move forward, lift up, move backward and press down on the sewing platform, so as to assist in feeding the upper layer of cloth during sewing processing. In combination with the existing cloth feeding tooth structure, not only can the situation that the size of the needle and the stitch length are uneven due to the misalignment of the cloth layers be avoided, but also the cloth feeding speed can be accelerated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is the right view of the utility model.

[0020] Figure 3 It is a schematic diagram of the layout structure of the auxiliary cloth feeding and presser foot of the utility model.

[0021] Figure 4 It is a schematic diagram of the structure in which the first connecting rod of the utility model is sleeved on the lower shaft.

[0022] Figure 5 It is a cross-sectional schematic diagram of the utility model in which the first connecting rod is sleeved on the lower shaft.

[0023] Figure 6 It is a schematic structural diagram of the utility model in which the fourth connecting rod is sleeved on the upper shaft.

[0024] Figure 7 It is a cross-sectional schematic diagram of the fourth connecting rod sleeved on the upper shaft of the utility model.

[0025] Figure numerals: 10-base; 11-lower shaft; 111-first eccentric wheel; 12-cylindrical seat; 121-presser foot; 20-upright column; 21-first clearance groove; 30-machine head; 301-second clearance groove; 31-upper shaft; 311-second eccentric wheel; 312-first bearing seat; 313-second bearing seat; 314-third bearing seat; 315-fourth bearing seat; 316-fixed seat; 32-mounting block ; 33-limiting block; 41-first connecting rod; 42-second connecting rod; 43-first rotating shaft; 44-third connecting rod; 45-swinging fork; 46-first transmission arm; 51-fourth connecting rod; 52-locking block; 53-locking sleeve; 54-second rotating shaft; 55-fifth connecting rod; 56-second transmission arm; 61-triangular arm; 62-connecting arm; 63-driven arm; 64-auxiliary cloth feeding; 641-accommodating groove. DETAILED DESCRIPTION

[0026] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0027] The interlock sewing machine is also called a special sewing machine. The stitches it sews are chain sewing stitches, which are mostly used for collar rolling, hemming, folding, interlocking, splicing and trimming of knitted garments. The existing interlock sewing machine includes a sewing body, a needle bar mechanism, a presser foot mechanism, a bending needle mechanism and a cloth feeding mechanism. The upper shaft and the lower shaft in the sewing body are driven by a motor to drive the needle bar mechanism, the presser foot mechanism, the bending needle mechanism and the cloth feeding mechanism to perform sewing. Since the interlock sewing machine is an existing equipment, the above-mentioned mechanisms are also common knowledge known to those skilled in the art, and are also recorded in the literature related to sewing equipment, so its specific working principle will not be further described. The following will be combined with the attached Figure 1 To Attachment Figure 7 The main improvements of the present invention are described in detail.

[0028] Reference Figures 1 to 4, A vertical overlock sewing machine, comprising a base 10, a column 20 vertically arranged on the base 10, and a machine head 30 connected to the column 20. Both the base 10 and the machine head 30 are long strip-shaped. The column 20 is arranged at the same end of the base 10 and the machine head 30, and the whole sewing body is arranged in a "匚" shape. There is an upper shaft 31 in the machine head 30, and a lower shaft 11 parallel to the upper shaft 31 in the base 10. There is a motor (not shown in the figure) in the column 20, and the motor drives the upper shaft 31 and the lower shaft 11 through the cooperation of a transmission belt and belt pulleys. At one end of the machine head 30 away from the column 20, there is a needle bar mechanism and a presser foot mechanism传动连接 to the upper shaft 31. The base 10 is vertically provided with a cylindrical seat 12, and a needle plate is installed at the highest point of the cylindrical seat 12. Multiple needle holes for the sewing needles (not shown in the figure) of the needle bar mechanism to pass through are formed on the needle plate. The above-mentioned presser foot mechanism has a presser foot 121 located on one side of multiple sewing needles, and the presser foot 121 can approach or move away from the needle plate. A loop wheel mechanism and a feeding mechanism传动连接 to the lower shaft 11 are arranged in the cylindrical seat 12. Taking the length direction of the base 10 as the left-right direction, an auxiliary feeding assembly is hinged at one end of the machine head 30 away from the column 20. The auxiliary feeding assembly is located above the cylindrical seat 12. The lower shaft 11 is sleeved with a first eccentric wheel 111, and the first eccentric wheel 111 is connected with a swing assembly for driving the auxiliary feeding assembly to reciprocate back and forth; the upper shaft 31 is sleeved with a second eccentric wheel 311, and the second eccentric wheel 311 is connected with a lifting assembly for driving the auxiliary feeding assembly to reciprocate up and down so as to approach or move away from the sewing platform. It should be noted here that the sewing platform is the plane at the top of the cylindrical seat 12.

[0029] Refer to Figures 1 to 4 , An installation block 32 is fixedly locked at the right end of the machine head 30, and a limiting block 33 is fixedly locked below the installation block 32. There is a gap between the limiting block 33 and the machine head 30; the auxiliary feeding assembly includes a triangular arm 61, which has three connection endpoints, namely a first connection point at the top, a second connection point hinged to the installation block 32, and a third connection point on the same straight line as the second connection point. A connecting arm 62 vertically arranged and passing through the above gap is hinged at the third connection point. A driven arm 63 is arranged on the right side of the free end of the connecting arm 62. A groove is recessed at the top of the driven arm 63, and the groove is located below the above-mentioned limiting block 33. An auxiliary feeder 64 is fixedly connected to the bottom end of the driven arm 63. Through such a setting, when the lifting assembly drives the auxiliary feeding assembly to reciprocate up and down, the groove at the bottom end of the driven arm 63 and the limiting block 33 can play a limiting role to prevent the lifting stroke from being too long.

[0030] Refer to Figures 1 to 5A first clearance groove 21 is provided on the side wall of the column 20, and the swing assembly includes a first connecting rod 41 that passes through the first clearance groove 21 of the column 20 and is sleeved on the first eccentric wheel 111, a second connecting rod 42 that is hinged at the free end of the first connecting rod 41, a first bearing seat 312 and a second bearing seat 313 that are fixedly arranged on the front side wall of the machine head 30 and are arranged in a straight line and spaced apart, a first rotating shaft 43 that passes through the first bearing seat 312 and the second bearing seat 313 respectively, and a fixed seat 316 located below the second bearing seat 313, wherein the free end of the second connecting rod 42 is sleeved on one end of the first rotating shaft 43 that passes through the first bearing seat 312, and the first connecting rod 42 is hinged on the free end of the first connecting rod 41. One end of a rotating shaft 43 passing through the second bearing seat 313 is sleeved with a vertically arranged third connecting rod 44, the free end of the third connecting rod 44 is locked and connected to a swing fork 45, the middle part of the swing fork 45 is hinged on the fixed seat 316, the bottom end of the swing fork 45 is locked and connected to a first transmission arm 46 arranged along the front-to-back direction, the free end of the first transmission arm 46 is locked and connected to the driven arm 63, through such an arrangement, when the lower shaft 11 rotates, the first eccentric wheel 111 rotates accordingly, thereby driving the first connecting rod 41 to move up and down, and then the first connecting rod 41 drives the auxiliary cloth feeding to reciprocate back and forth through the transmission components in the above-mentioned swing assembly.

[0031] Reference Figures 1 to 7 The side wall of the machine head 30 is provided with a second clearance groove 301, and the lifting assembly includes a fourth connecting rod 51 passing through the second clearance groove 301 of the machine head 30 and sleeved on the second eccentric wheel 311, a locking block 52 locked and connected to the free end of the fourth connecting rod 51, a third bearing seat 314 and a fourth bearing seat 315 fixedly arranged on the front side wall of the machine head 30 and arranged in a straight line at intervals, and a second rotating shaft 54 ​​passing through the third bearing seat 314 and the fourth bearing seat 315 respectively, and a locking sleeve 53 is provided on the top of the locking block 52, and the locking sleeve 53 is locked on the second rotating shaft by bolts. 54 passes through one end of the third bearing seat 314, and one end of the second rotating shaft 54 ​​passes through the fourth bearing seat 315 and is sleeved with a fifth connecting rod 55. The free end of the fifth connecting rod 55 is locked and connected with a second transmission arm 56 arranged along the front-to-back direction. The free end of the second transmission arm 56 is locked and connected to the first connection point at the top of the above-mentioned triangular arm 61. Through such an arrangement, when the upper shaft 31 rotates, the second eccentric wheel 311 rotates accordingly, thereby driving the fourth connecting rod 51 to swing back and forth, and then the fourth connecting rod 51 drives the auxiliary cloth feeding to reciprocate up and down through the transmission components in the above-mentioned lifting assembly.

[0032] Reference Figures 1 to 7During sewing, the upper shaft 31 and the lower shaft 11 are driven by the motor to start rotating at the same time. At this time, the first connecting rod 41 is driven by the first eccentric wheel 111 to reciprocate up and down. Driven by the first connecting rod 41, the second connecting rod 42 swings up and down accordingly, and drives the first rotating shaft 43 to rotate slightly, thereby causing the third connecting rod 44 connected to the first rotating shaft 43 to swing back and forth. Driven by the third connecting rod 44, the swing fork 45 and the first transmission arm 46 swing back and forth at the same time, thereby causing the first transmission arm 46 to drive the first rotating shaft 43 to swing back and forth. The driven arm 63 swings back and forth, so that the auxiliary cloth feeding 64 reciprocates back and forth on the sewing platform of the columnar seat 12; the fourth connecting rod 51 reciprocates back and forth under the drive of the second eccentric wheel 311, and the locking block 52 and the locking sleeve 53 swing back and forth accordingly under the drive of the fourth connecting rod 51, thereby driving the second rotating shaft 54 ​​to rotate slightly, and then the fifth connecting rod 55 connected to the second rotating shaft 54 ​​swings back and forth, and under the drive of the fifth connecting rod 55, the second transmission arm 56 reciprocates back and forth accordingly.

[0033] Because the second transmission arm 56 is locked and connected to the first connection point at the top of the triangular arm 61, the second connection point at the bottom of the triangular arm 61 is hinged to the mounting block 32, and the third connection point at the bottom of the triangular arm 61 is hinged to the top of the connecting arm 62. Driven by the second transmission arm 56, the triangular arm 61 will reciprocate up and down, thereby driving the connecting arm 62, the driven arm 63 and the auxiliary cloth feed 64 locked and connected to the bottom of the driven arm 63 to reciprocate up and down. While the auxiliary cloth feed 64 reciprocates up and down, the first transmission arm 46 will also drive the auxiliary cloth feed 64 to reciprocate back and forth, thereby causing the auxiliary cloth feed 64 to press down, move forward, lift up, move backward and press down, thereby cooperating with the presser foot 121 and the feed dog to complete the sewing and cloth feeding actions.

[0034] The utility model has an auxiliary cloth feeding assembly 64 hingedly connected to the machine head 30, and a first eccentric wheel 111 and a second eccentric wheel 311 are respectively sleeved on the lower shaft 11 and the upper shaft 31, wherein the first eccentric wheel 111 is connected to a swinging assembly for driving the auxiliary cloth feeding assembly to reciprocate forward and backward, and the second eccentric wheel 311 is connected to a lifting assembly for driving the auxiliary cloth feeding assembly to reciprocate up and down so as to approach or move away from the sewing platform. Driven by the swinging assembly and the lifting assembly, the auxiliary cloth feeding assembly 64 can press down, move forward, lift up, move backward and press down on the sewing platform, thereby auxiliary cloth feeding is performed on the upper layer of cloth during sewing processing, which not only avoids the situation where the size of the needles and the stitch length are uneven due to the misalignment of the cloth layers, but also speeds up the cloth feeding speed.

[0035] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A column-type interlock sewing machine, comprising a base, a column erected on the base, and a machine head connected to the column, wherein an upper shaft is arranged in the machine head, a lower shaft parallel to the upper shaft is arranged in the base, a motor for driving the upper shaft and the lower shaft to rotate is arranged in the column, a presser foot mechanism connected to the upper shaft is arranged at one end of the machine head away from the column, a columnar seat is erected on the base, and a sewing platform for placing cloth is arranged on the top of the columnar seat, characterized in that: Taking the length direction of the base as the left-right direction, an auxiliary cloth feeding assembly is hingedly connected to one end of the machine head away from the column, and the auxiliary cloth feeding assembly is located above the columnar seat. The lower shaft sleeve is provided with a first eccentric wheel, and the first eccentric wheel is connected to a swinging assembly for driving the auxiliary cloth feeding assembly to reciprocate back and forth; the upper shaft sleeve is provided with a second eccentric wheel, and the second eccentric wheel is connected to a lifting assembly for driving the auxiliary cloth feeding assembly to reciprocate up and down so as to approach or move away from the sewing platform.

2. The column-type interlock sewing machine according to claim 1, characterized in that: A mounting block is provided at the right end of the machine head, a limiting block is locked below the mounting block, and a gap is provided between the limiting block and the machine head; the auxiliary cloth feeding assembly comprises a triangular arm, one end of the triangular arm is hinged to the mounting block, and the other end located in the same straight line is hinged to a connecting arm which is vertically arranged and passes through the gap, a driven arm is provided on the right side of the free end of the connecting arm, a groove is recessed at the top end of the driven arm, and the groove is located below the limiting block, and the bottom end of the driven arm is locked and connected with the auxiliary cloth feeding.

3. The column-type interlock sewing machine according to claim 2, characterized in that: The swing assembly includes a first connecting rod that passes through the column and is sleeved on the first eccentric wheel, a second connecting rod hinged at the other end of the first connecting rod, a first bearing seat and a second bearing seat that are fixedly arranged on the front side wall of the machine head and are arranged in a straight line at intervals, a first rotating shaft that passes through the first bearing seat and the second bearing seat respectively, and a fixed seat located below the second bearing seat, the free end of the second connecting rod is sleeved on one end of the first rotating shaft that passes through the first bearing seat, the end of the first rotating shaft that passes through the second bearing seat is sleeved with a vertically arranged third connecting rod, the free end of the third connecting rod is locked and connected with a swing fork, the swing fork is hinged on the fixed seat, the bottom end of the swing fork is locked and connected with a first transmission arm arranged along the front and rear directions, and the free end of the first transmission arm is locked and connected with the driven arm.

4. The column-type interlock sewing machine according to claim 3, characterized in that: The lifting assembly includes a fourth connecting rod that passes through the machine head and is sleeved on the second eccentric wheel, a locking block locked and connected to the other end of the fourth connecting rod, a third bearing seat and a fourth bearing seat fixedly arranged on the front side wall of the machine head and arranged in a straight line at intervals, and a second rotating shaft that passes through the third bearing seat and the fourth bearing seat respectively, a locking sleeve is provided on the top of the locking block, and the locking sleeve is locked by bolts to one end of the second rotating shaft that passes through the third bearing seat, and one end of the second rotating shaft that passes through the fourth bearing seat is sleeved with a fifth connecting rod, the free end of the fifth connecting rod is locked and connected to a second transmission arm arranged along the front and rear directions, and the free end of the second transmission arm is locked and connected to the top end of the triangular arm.

5. The column-type interlock sewing machine according to claim 4, characterized in that: The front side wall of the column is provided with a first clearance groove for the first connecting rod to pass through; the front side wall of the machine head is provided with a second clearance groove for the fourth connecting rod to pass through.

6. The column-type interlock sewing machine according to claim 1, characterized in that: The auxiliary cloth feeding device is provided with a receiving groove for receiving the presser foot in the presser foot mechanism.

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