JP4057890B2 - Zigzag sewing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a zigzag sewing machine that firmly stitches a long and thick fabric, for example, a fabric that is folded and overlapped to form an eye portion of a belt sling and is sewn together with zigzag stitches. The present invention is suitable for zigzag sewing of long and thick fabrics typified by belt slings, and particularly suitable for zigzag sewing when forming the eye portion of the belt sling. It can also be applied to zigzag stitching at the connection or reinforcement part of belt materials where high tensile strength is required.
[0002]
[Prior art]
For example, when a plurality of fabrics are sewn together, there are many examples in which each fabric is sewn with a so-called zigzag seam (zigzag stitching) so that the fabrics can be firmly integrated in a contact state. Such zigzag sewing is found around button holes and cloth overlapping portions in general clothes, and is also found in, for example, an eye part of a belt sling when a long and thick cloth is firmly sewn. Normally, these zigzag sewings use their own zigzag sewing machines. Conventional zigzag sewing machines are mainly XY-controlled zigzag sewing machines that hold the fabric and move back and forth, and right and left. For example, as shown in Patent Document 1, the fabric is reciprocated in the longitudinal direction and orthogonal to the fabric. Thus, the sewing machine main body is configured to reciprocate.
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 07-010706 (Pages 2 to 3, Fig. 1)
[0004]
[Problems to be solved by the invention]
The conventional zigzag sewing machine disclosed in Patent Document 1 has a short fabric movement range necessary for zigzag sewing. This means that the fabric is held in the vicinity of the sewing site, and it is not necessary to consider the support other than the sewing site, and there is no problem even if the sewing site is hung from the zigzag sewing machine. In addition, like the zigzag seam around the button hole, the conventional zigzag seam has an extremely narrow sewing range, or the folding length is relatively short with respect to the zigzag pitch (for example, the total pitch is approximately the folding length). Equally approximately square sewing range), and the reciprocating motion of the orthogonal sewing machine body and fabric was easy to achieve.
[0005]
In contrast, zigzag stitching, in which folded fabrics are stacked together to form the eye part of a belt sling (hanging belt), is a long and thick belt sling fabric, and the part to be sewn (actually If the parts other than the part zigzag stitched) are not supported, the sewing part cannot be smoothly reciprocated in the longitudinal direction and the short direction of the fabric. Also, the folding length is usually longer than the zigzag stitch pitch, and the belt sling movement amount is longer than the movement amount of the sewing machine body per unit time. Reciprocal movement was difficult to coordinate.
[0006]
In addition, in order to reciprocate the sewing machine main body, there is a problem that the driving means becomes large or the control becomes complicated in order to realize high-speed reversal while stabilizing the trajectory of the sewing machine main body against the inertia of the sewing machine main body. there were. This leads to an increase in the size and manufacturing cost of the zigzag sewing machine. Therefore, we studied to develop a zigzag sewing machine that can easily support other than the sewing site without hindering the zigzag stitching at the sewing site, and can be used regardless of the length of the zigzag sewing with respect to the pitch. .
[0007]
[Means for Solving the Problems]
What has been developed as a result of the study is a zigzag sewing machine that sews long and thick fabrics firmly, and consists of a sewing machine body, a sewing machine table, and a traverse unit.The sewing machine body is fixed in a horizontal position. A zigzag sewing machine characterized in that a longitudinal reciprocating means and a transverse reciprocating means for the fabric are provided in the traverse portion. Here, the “sewing machine main body” of the present invention mainly refers to an upper arm installed on the sewing machine table, and is a part for raising and lowering the sewing needle toward the sewing machine table.
[0008]
Below, a belt sling is mentioned and demonstrated as a concrete fabric. Accordingly, the longitudinal direction of the fabric is the longitudinal direction (extending direction) of the belt sling, and the short direction of the fabric is the short direction (width direction) of the belt sling. From this, the sewing range of the zigzag seam is the folding length in the longitudinal direction × (the pitch in the short direction × the number of pitches in the short direction).
[0009]
The zigzag sewing machine of the present invention has a zigzag seam formed by moving the belt sling in the longitudinal and short directions relative to the sewing needle while fixing the horizontal position of the sewing machine body, that is, the sewing needle. To. As a result, it is not necessary to move the sewing machine main body, and the whole apparatus can be easily downsized and simplified.
[0010]
The present invention disassembles the moving direction of the belt sling into the longitudinal direction and the short direction of the belt sling. That is, (1) the sewing machine table is a means for reciprocating the cloth in the longitudinal direction, and presses the cloth from above and below together with the presser plate of the sewing machine body that is in contact with the cloth from below and in sliding contact with the cloth from above. (2) The traverse unit is a means for reciprocating the cloth in the short direction of the cloth. A pair of guides for reciprocating the fabric in the short direction of the fabric is provided.
[0011]
As described above, the feed unit and the traverse unit only need to be able to realize reciprocation in a single direction, and the configuration and control can be easily simplified. Moreover, the feed part can utilize the feed dog interlock | cooperated with raising / lowering of the sewing needle of a sewing machine main body. For this reason, the zigzag sewing machine of the present invention can be configured by using an existing sewing machine with a sewing machine table and adding a traverse unit as an additional device to the existing sewing machine.
[0012]
In the present invention, since the reciprocation in the longitudinal direction and the short direction of the fabric is independent, even in zigzag stitching that is long in either the folding direction or the pitch direction and has a rectangular sewing range, It can be easily set by increasing or decreasing one reciprocation of the traverse portion. For example, if the longitudinal direction is greatly reciprocated by the feed section and the traverse section is reciprocated with a small width in the short direction, zigzag stitching is performed so that the folding in the longitudinal direction is relatively long with respect to the pitch interval in the short direction. Therefore, the apparatus configuration is suitable when zigzag sewing is performed on the fabric that is folded and overlapped to form the eye part of the belt sling.
[0013]
As described above, since the zigzag sewing machine according to the present invention can be moved largely in the longitudinal direction or the short direction, the zigzag stitching in the belt sling sewing range that is long in the turn-back direction, which has been difficult to realize with the same type of device conventionally. Becomes easy. For this reason, the sewing machine table has a structure in which the main table provided with the cloth reciprocating means in the longitudinal direction extends in the longitudinal direction of the cloth, and the extended main table edge is opened. That is, the periphery of the sewing needle, which is a sewing site, stably supports the sewing range of the belt sling on the upper surface of the main table, and the belt sling can move without restriction in the direction of folding back of the sewing range. Do not provide projections or the like on the edge of the main table that follows.
[0014]
Here, the structure of each drive means of the traverse part and the feed part responsible for movement in the short and long directions of the belt sling may be the same or different, but if there is a difference in the amount of movement in each direction, unit time Since the amount of movement in each direction is different, it is preferable to configure different driving means in the short side direction and the long side direction. As shown in the above example, the longitudinal direction is reciprocated greatly by the feed section, the short direction is the traverse section reciprocated with a small width, and the folding in the longitudinal direction is relatively long with respect to the pitch interval in the short direction. When zigzag sewing is realized, the driving means that allows a large amount of movement in the longitudinal direction and maintains linearity reduces the amount of movement in the short direction and does not hinder the movement in the longitudinal direction. Each drive means is suitable.
[0015]
For example, as described above, the feed unit including the driving means described above can use the feed dogs of the existing sewing machine. Specifically, a feed portion is provided from a feed dog addressed to the fabric in a press-contact state from below, and a feed dog driving means for moving the feed dog by a forward / reverse loop movement in a vertical direction in the movement direction of the fabric by the feed dog. Constitute. In this case, the cloth can be reciprocated by the feed dog in accordance with the friction of the feed dog applied in the pressure contact state.
[0016]
Each tooth that constitutes the feed dog is an isosceles triangle section, that is, both sides of the tooth are inclined and applied to the fabric to form a cross-sectional shape that generates appropriate friction in both directions. Move. Here, “forward / reverse loop motion in the moving direction and vertical plane” means, for example, when moving the fabric to the left, the feed dog moves to the left with the fabric pressed against the fabric, and once separated from the fabric, the right This means a circular orbit that returns to the direction and presses against the fabric again and moves to the left.If the feed dog moves in the normal loop motion, the feed dog moves in the right direction while pressing against the fabric. It becomes exercise.
[0017]
Each guide portion of the preferred traverse portion is opposed to the feed dog with the cloth interposed therebetween, and a lower plate is slidably contacted with the main table of the sewing machine table, and the lower edge of the holding plate extends from the lower edge of the holding plate. It is the structure which consists of a slidable contact plate which slidably contacts with a main table. The height of the sandwich plate is preferably 1.5 to 3 times the thickness of the dough.
[0018]
Since the sandwiching plates of the guide portions facing each other at the height are both in sliding contact with the main table, the dough can be securely sandwiched, and both sandwiching plates reciprocate in the short direction in conjunction with each other. The reciprocating motion of the fabric in the short direction can be realized. The sliding contact plate is an auxiliary portion that guides the sandwich plate with respect to the main table in order to ensure the dynamic stability of the sandwich plate that reciprocates in the lateral direction while sliding on the main table.
[0019]
It is preferable that each guide part of the traverse part can reciprocate in the short direction while securely holding the fabric. For this purpose, the guide portion may be brought into sliding contact with the main table, for example, the sandwiching plate may be brought into sliding contact with the main table as described above. However, the guide portion that is in sliding contact with the main table becomes an obstacle when the fabric is carried in or out immediately below the sewing needle of the sewing machine body.
[0020]
Therefore, the traverse part is moved toward and away from each other, and the guide approaching / separating means for approaching and moving away from each other, the guide vertical movement means for moving toward and away from the sewing machine table, and the reciprocating movement in the short direction of the cloth while maintaining the approached or separated state The guide back-and-forth movement means may be provided in each guide portion. The relation of each means is free. For example, a guide up-and-down movement means can be provided in the guide approaching / separating means for reciprocally moving both guide portions, and a guide back-and-forth movement means can be provided in the guide up-and-down movement means.
[0021]
The guide approaching / separating means allows (1) the fabric to be sandwiched and (2) the fabric to the sewing machine body by making each guide part approach the fabric that has been carried onto the main table near the sewing needle of the sewing machine body evenly. It has the function of aligning right under the sewing needle. Examples of the guide approaching / separating means include a configuration in which a main table and racks parallel to each other are provided in each guide part, and both racks are advanced and retracted in opposite directions by pinions arranged between the racks. The guides that follow the advance and retreat of the rack reciprocate around the pinion so as to approach and separate from each other. Therefore, when the pinion is aligned with the sewing needle of the sewing machine body in the short direction, the fabric can be aligned.
[0022]
The guide up-and-down moving means temporarily retracts each guide portion that is in sliding contact with the main table from the main table when carrying the cloth near the sewing needle of the sewing machine body or carrying out the cloth after sewing. Further, since the guide vertical movement means determines the vertical position of each guide portion, for example, the height at which each guide portion slides on the main table can be adjusted so that each guide portion does not excessively rub against the main table. You can As this guide up-and-down movement means, the cylinder provided with respect to the up-and-down movement base part which provided the guide approach / separation means of the said both guide parts can be illustrated. Since the guide approaching / separating means and the guide up-and-down moving means do not need to be interlocked, different driving means may be used.
[0023]
The guide back-and-forth movement means reciprocally moves both guide portions in a state where the cloth is sandwiched, that is, in a state of being close to each other, in order to realize zigzag sewing which is the purpose of the zigzag sewing machine of the present invention. As this guide back-and-forth movement means, the vertical movement base part provided with the guide approaching / separating means of both guide parts is slidable on the guide rail extending in the short direction, and the vertical movement base part is extended in the short direction. A configuration in which an existing ball screw is screwed can be exemplified.
[0024]
When a guide vertical movement means (for example, a cylinder) is provided at the vertical movement base, the guide back-and-forth movement means reciprocally moves both guide parts, the guide approaching / separating means and the guide vertical movement means together. The reciprocating motion in which both guide portions are integrated is a small amount with respect to the zigzag seam folding. However, since it is desirable that the reciprocating motion can be performed at an accurate pitch, the reciprocating motion by the ball screw is preferable.
[0025]
In the present invention, in a zigzag sewing machine that firmly sews a long and thick fabric so that a large number of fabrics can be zigzag stitched continuously, a carry-in device that sequentially feeds the fabric before zigzag sewing to the sewing machine body; A carry-out device for feeding out the fabric after zigzag sewing from the main body of the sewing machine was attached.
[0026]
A specific carry-in device includes a buffer device that stores a plurality of fabrics, and a moving chuck that feeds the fabrics from the buffer device to the sewing machine main body one by one. The moving chuck may be provided with a pair of left and right sides, preferably a pair of left and right sides with a sewing table interposed, so that a long fabric, belt sling, etc. can be fed toward the sewing machine main body without lateral displacement.
[0027]
The buffer device may have any configuration as long as it can store a plurality of fabrics. For example, the buffer device includes a buffer cylinder having a configuration in which a pair of cylinder plates provided with a plurality of slits in the circumferential direction in which fabrics can be inserted in the radial direction are arranged. The structure which rotates intermittently at the space | interval of the said slit toward a sewing machine main body with a motor can be illustrated. When the cloth held in the buffer cylinder reaches a predetermined radial position, the moving chuck grasps the cloth and sends it to the sewing machine main body.
[0028]
With respect to the buffer device, the moving chuck reciprocates between the buffer cylinder and the sewing machine body. When the cloth held in the buffer cylinder on the forward path reaches a predetermined radial position, the moving chuck grasps the cloth and feeds it to the sewing machine body, and releases the cloth fed to the sewing machine body on the return path and returns to the buffer cylinder. .
[0029]
When applied to the zigzag sewing machine consisting of the sewing machine body, sewing machine table, and traverse unit, the buffer cylinder of the loading device has a slit that can be inserted in the radial direction with a long belt sling extended in the longitudinal direction. A plurality of cylinder plates provided at equal intervals are provided, and are rotated toward the main table intermittently at slit intervals by a cylinder drive motor.
[0030]
When the belt sling held in the buffer cylinder is flush with the main table (predetermined radial position, horizontal position parallel to the normal main table), the cloth is moved to the moving chuck that reciprocates between the main table and the sub table. Hand over. In this case, a pair of moving chucks may be provided on the left and right sides of the buffer cylinder, and the moving chucks may be reciprocated along a track extending to the sewing machine body in synchronization.
[0031]
The unloading device rotates the vertical rotating plate that protrudes the engaging rod that is hooked on the lower surface of the cloth in a direction away from the sewing machine body by the unloading drive motor, and the cloth is moved by the circular movement of the engaging rod that is hooked by contacting from the lower surface of the cloth. Carry it out as if it were unwinding. When applied to the zigzag sewing machine consisting of the sewing machine body, sewing machine table and traverse part, the unloading device is a vertical rotating plate that protrudes an engaging rod that hooks onto the lower surface of the belt sling, and is a support base that protrudes on the right side of the sub table. A carry-out drive motor is fixed to the machine, and the vertical rotation plate is rotated clockwise by the carry-out drive motor (a direction away from the sewing machine main body).
[0032]
The fabric after zigzag stitching may be directly carried out from the spot, but in order to feed the next fabric by the carry-in device, the fabric after zigzag sewing is preferably moved to the carry-out position and then carried out. In this case, it is moved onto the engagement rod of the carry-out device while being sandwiched between the guide portions. Since the guide unit returns to the vicinity of the sewing needle again by delivering the fabric to the carry-out device, a support unit for temporarily fixing the fabric position is supported by the traverse unit so that the guide unit does not move during the return movement of the guide unit. It is good to provide from the arm toward the sub table. The holding part has a holding plate that is about the width of the dough at the lower end of the holding cylinder that moves up and down, presses the dough with the holding plate that is lowered by moving the cylinder forward, and releases the dough from the holding plate that is lifted by moving the cylinder backward. To do.
[0033]
The unloading device rotates the vertical rotation plate to the right to bring the engagement rod into contact with the lower surface of the fabric, and unloads the fabric by the circular motion of the engagement rod that is hooked on the fabric by friction. Since the circular movement of the engaging rod includes horizontal movement, the fabric can be fed by the horizontal movement amount = diameter equivalent amount L of the circular movement of the engaging rod. Since the engagement rod repeatedly abuts on the lower surface of the fabric according to the vertical rotating plate, the fabric can be finally carried out. As described above, since the engaging rod needs to be engaged with the fabric by friction, it is preferable to roughen the surface or use an engaging rod having a square cross section, for example.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a right side view showing an example of a zigzag sewing machine according to the present invention (not shown on the near side traverse portion 3, the same applies to the right side view hereinafter), and FIG. 2 is a plan view of the zigzag sewing machine (traverse portion 3 3 is a front view of the zigzag sewing machine, and FIG. 4 is a guide section 4, 4 of the traverse section 3 and the feed section 2 of the main table 1. FIG. FIG. 5 is an enlarged perspective view of the main part showing the structure and movement of the feed dog 7, and FIG. 6 is the axial direction of the loading device 9 of the belt sling 8. FIG. 7 is a cross-sectional view, and FIG. 7 is a side view showing a process of carrying out the belt sling 8 by the carry-out device 10.
[0035]
The zigzag sewing machine of this example carries in, for example, the belt sling 8 before zigzag sewing sequentially from the left in FIG. 1, moves the belt sling 8 after zigzag sewing to the right in FIG. 1, and carries it out from the front side in FIG. . For this reason, a carry-in device 9 for sequentially carrying the belt sling 8 in a direction transverse to the main table 1 on the front side of the zigzag sewing machine (left end in FIG. 1) is provided at the back of the zigzag sewing machine body 5 (see FIG. A carry-out device 10 for carrying out the belt sling 8 in a manner that draws the belt sling 8 toward the right in the middle of 1 is provided.
[0036]
The zigzag sewing machine of this example is composed of a sewing machine body 5, a sewing machine table 11, and a traverse part 3 as seen in FIGS. 1 to 3. This example is based on a sewing machine table 11 having a size capable of incorporating an electric motor or the like serving as a power source for each part. On the main table 1 of the sewing machine table 11, a sewing machine body 5 and a traverse part 3 are provided. As shown in FIG. 4, the sewing machine main body 5 has a structure in which the sewing needle 13 and the presser plate 6 are lowered from the end of the main body arm 12 protruding from the back side of the sewing machine table 11 to the front side of the sewing machine table 11, and the basic structure The specs remain the same.
[0037]
The traverse part 3 extends support arms 14 and 14 from both sides of the back side of the sewing machine table 11 to the front side of the main table 1 so as to surround the sewing machine body 5, and the main table 1 extends back and forth near the sewing needle 13 of the sewing machine body 5. Each of the guide portions 4, 4 including the sandwiching plate 15 and the sliding contact plate 16 that crosses is lowered. Since the zigzag sewing machine of the present invention does not require the sewing needle 13 to be moved horizontally, the basic specification of the sewing machine body 5 is basically the same as that of the ready-made product. For this reason, the zigzag sewing machine of the present invention can be configured even if only the traverse portion is attached to an existing sewing machine composed of a sewing machine body and a sewing machine table, for example.
[0038]
The sewing machine table 11 includes a main table 1 and sub tables 17 and 17 that can be placed across the belt sling 8. In this example, the carry-in device 9 and the carry-out device 10 for the belt sling 8 are provided, and in addition, the sewing machine main body 5 is installed. Therefore, the main table 1 extends in the short direction of the belt sling 8. The main table 1 only needs to extend in the longitudinal direction of the belt sling 8 by the feed portion 2 provided in the vicinity of the center, and the end of the extended main table 1 may be open. From now on, in the process from carrying in to carrying out, the belt sling 8 can be hung outward from both sides of the main table 1 (see FIG. 2).
[0039]
The left and right sub-tables 17 and 17 attached to the main table 1 also serve as support for the belt sling 8, and support rollers 18 for assisting the left-right movement of the belt sling 8 on both sides of the sub-tables 17 and 17. 18 is provided. In addition, moving chucks 19 and 19 for transferring the belt sling 8 from the buffer cylinder 44 to the position immediately below the sewing needle 13 are disposed as gaps between the main table 1 and the sub-tables 17 and 17 as components of the loading device 9.
[0040]
The moving chuck 19 is configured to open and close the upper and lower claws by driving the cylinder, and protrudes from the main table 1 in the forward path (just below the buffer cylinder 44 → the sewing needle 13) by the circulating belt 57, pinches the belt sling 8 and transfers it. At (under the sewing needle 13 → the buffer cylinder 44), it is immersed in the lower surface of the main table 1 so as not to interfere with the carried belt sling 8.
[0041]
The feed section 2 of the main table 1 uses a feed dog 7 and a feed dog driving means 21 that normally constitute a sewing machine. As shown in FIG. 4, the specific feed unit 2 includes a feed dog 7 that is in pressure contact with the belt sling 8 from below and a feed dog driving means 21. As shown in FIG. 5, the feed dog 7 is a block body in which a large number of teeth 22 having an isosceles cross section having a hypotenuse equal in the longitudinal direction (left and right in FIG. 5) are arranged, and is paired with an opposing pressing plate 6. The belt sling 8 is moved little by little in the longitudinal direction according to the forward and reverse loop motion of the feed dog 7 (indicated by the arrow in FIG. 5) by the friction between the tooth 22 and the belt sling 8 generated by sandwiching the belt sling 8. .
[0042]
The feed dog drive means 21 has the same configuration as a conventionally known feed dog drive means, supports the feed dog support portion 23 with a drive crank and a driven crank (both cranks not shown), and rotates the drive crank to feed teeth 7. It is converted into a loop motion. The feed dog 7 can reciprocate the belt sling 8 in the zigzag fold-back direction by rotating the drive crank in both forward and reverse directions. Further, as described above, the wide feed dog 7 in which the teeth 22 having isosceles triangles are juxtaposed so as to be able to stably reciprocate the belt sling 8 in both the left and right directions is symmetrical with respect to the pull-out opening 24 of the lower thread. Two rows are provided in parallel to the position.
[0043]
As shown in FIG. 4, the traverse portion 3 is moved back and forth along the support arm 14, the vertical movement base portion 25 moving up and down with respect to the vertical movement base portion 25, and the vertical movement base portion 26 as a reference. The guide portions 4 (the sandwiching plate 15 and the sliding contact plate 16) are attached to the front and rear arms 27 and 28 that are separated from each other.
[0044]
The longitudinally moving base 25 is a U-shaped cross-sectional frame body that moves in accordance with guide rails 29, 29 extending in the short direction along each support arm 14, and is a ball screw that extends in parallel with the guide rails 29, 29. (Guiding back-and-forth movement means) 30 is screwed into the moving base 31 on the outer surface of the back-and-forth moving base 25, and the ball screw 30 is rotated forward and backward by a ball screw driving section (electric motor) 32 to reciprocate along the guide rails 29 and 29. Is realized.
[0045]
The guide rail 29 of this example is a rack (rack representation not shown in FIG. 4), and engages with a pinion (not shown) provided on the longitudinal movement base 25 to stabilize reciprocation. This longitudinally moving base 25 reciprocates integrally with a vertically moving base 26 and a vertically moving cylinder (guide vertical moving means) 33, front and rear arms 27 and 28, an approaching / separating cylinder (guide approaching / separating means) 34, and a guide part 4 which will be described later. It is desirable to stabilize the movement by engaging the rack and pinion as in this example.
[0046]
The vertically moving base 26 is fitted to vertical tracks (round pipes) 35, 35 standing on the inner surface of the longitudinally moving base 25, and a U-shaped frame having a U-shaped cross section that can be displaced vertically according to the vertical tracks 35, 35. The vertical movement cylinder (guide vertical movement means) 33 fixed to the longitudinal movement base 25 moves up and down within the range of the longitudinal movement base 25. Compared to the approach / separation cylinder (guide approach / separation means) 34 for positioning the belt sling 8, the vertical movement cylinder (guide vertical movement means) 33 for the purpose of retracting the guide portion 4 from the main table 1 has a more precise positioning and separation. Since movement control is not necessary, a cylinder (such as an air cylinder) that simply realizes linear motion as in this example is preferable because the weight of each part according to the longitudinal base 25 can be reduced.
[0047]
The longitudinally moving base 25 and the vertically moving base 26 are U-shaped frames having similar cross-sections, with the inner surfaces facing each other, and the vertically moving base 26 having a small outer shape is fitted to the longitudinally moving base 25 (see FIG. 3). Thereby, the approaching / separating cylinder (guide approaching / separating means) 34 and other members can be provided on the outer surface of the vertically moving base 26.
[0048]
The front and rear arms 27 and 28 are suspended from the plate-like front and rear approaching / separating base portions 36 and 37 that move in parallel along the vertical movement base portion 26. The slidable contact plate 16 constituting the guide portion 4 is constructed between the lower ends of the front and rear arms 27 and 28 that are paired on the left and right sides, and a sandwich plate 15 is attached to the inner side of each slidable contact plate 16 facing each other. The sandwiching plate 15 has a vertical surface having a height approximately twice as high as the overlap of the belt sling 8 in the eye portion, and can securely sandwich the belt sling 8.
[0049]
As shown in FIGS. 4 and 5, the notch portion within the range of the presser plate 6 is provided so as not to interfere with the presser plate 6 and the sewing needle 13 that descend from the sewing machine body 5 when the sandwiching plates 15 and 15 approach each other. 38 is provided. The front and rear approaching separation base parts 36 and 37 are fitted to upper and lower rails 39 and 40, respectively, extending in the short direction to the outer surface of the vertical movement base part 26, and the upper edge and the rear approaching separation part of the front approaching and separation base part 36, respectively. A rack surface (rack representation not shown in FIG. 4) is provided at the lower edge of the base 37, and a pinion 41 with which each rack surface engages is pivotally attached to the outer surface of the vertically moving base 26.
[0050]
As a result, the front and rear approach / separation base portions 36 and 37 move in opposite directions to each other via the pinion 41 to realize approach and separation. The guide approach / separation means is an approach / separation cylinder 34, 34 connected to each approach / separation base 36, 37 on the basis of the vertically moving base 26. Theoretically, since the movement of one of the front and rear approach / separation base parts 36 and 37 is transmitted to the other side through the pinion 41, it is transmitted to the front or rear approach / separation base part 36 and 37. A cylinder 34 may be provided. However, in order to stably and reliably approach and separate the front and rear approach / separation base portions 36 and 37, that is, the guide portions 4 and 4, it is preferable to provide a pair of approach and separation cylinders 34 and 34 as in this example.
[0051]
As shown in FIGS. 1 to 3 and 6, the carry-in device 9 is provided with slits 42 that can be inserted in the radial direction with the belt sling 8 extended in the longitudinal direction in eight directions at equal intervals in the circumferential direction. And a pair of left and right moving chucks 19 and 19 that reciprocate between the buffer cylinder 44 and the sewing machine main body 5.
[0052]
The buffer cylinder 44 is intermittently rotated toward the main table 1 at a slit interval by a cylinder drive motor 45. Then, when the belt sling 8 held in the buffer cylinder 44 is flush with the main table 1, the belt sling 8 is delivered to the moving chuck 19 that reciprocates in the gap between the main table 1 and the sub table 17.
[0053]
Since the belt sling 8 changes its posture in accordance with the rotation of the buffer cylinder 44, a plate 46 is installed to each slit 42 for the purpose of stably holding the belt sling 8, and is clipped to each plate 46. 47 and 47 are provided, and the belt sling 8 is held by the clips 47 and 47 in a state in which the belt sling 8 is attached to the destination plate 46 so as to follow the rotation of the buffer cylinder 44.
[0054]
As shown in FIGS. 1 to 4 and 7, the carry-out device 10 is composed of a vertical rotating plate 49 that protrudes only one engaging rod 48 that is hooked on the lower surface of the belt sling 8, and protrudes to the right side surface of the sub table 17. An unloading drive motor 51 is fixed to the provided support base 50, and the unloading drive motor 51 rotates the vertical rotating plate 49 in the clockwise direction when viewed from the front (front of FIG. 7).
[0055]
After the zigzag stitching, the belt sling 8 is moved onto the engaging rod 48 of the carry-out device 10 while being sandwiched between the guide portions 4 and 4. Since the guide portions 4 and 4 return the belt sling 8 to the carry-out device 10 and return to the vicinity immediately below the sewing needle 13, the belt sling is temporarily temporarily prevented from shifting during the return movement of the guide portions 4 and 4. A pressing portion 52 for fixing the position of the position 8 is provided from the support arm 14 of the traverse portion 3 toward the sub table 17.
[0056]
The holding part 52 has a structure in which a holding plate 54 having a width of about 8 widths of the belt sling is provided at the lower end of the holding cylinder 53 that moves up and down. The belt sling 8 is released from the holding plate 54 to be lifted up.
[0057]
The carry-out device 10 rotates the vertical rotating plate 49 clockwise to bring the engagement rod 48 into contact with the lower surface of the belt sling 8 and feeds the belt sling 8 by the circular motion of the engagement rod 48 that is hooked on the belt sling 8 by friction. Carry out to. For example, when the engagement rod 48 rises according to the right rotation of the vertical rotation plate 49 and comes into contact with the lower surface of the belt sling 8, the contact position A (indicated by a black triangle mark) follows the engagement rod 48 by friction. .
[0058]
Since this circular movement of the engaging rod 48 includes horizontal movement, the contact position A can be fed out of the belt sling 8 by the horizontal movement amount = diameter equivalent amount L of the circular movement of the engaging rod 48. Since the engaging rod 48 repeatedly contacts the lower surface of the belt sling 8 according to the vertical rotating plate 49, the belt sling 8 can be finally carried out.
[0059]
As described above, since the engaging rod 48 needs to be engaged with the belt sling 8 by friction, when the surface is roughened, for example, when the engaging rod 48 having a square cross section (in the example, a quadrangle) is used as in this example. Good. Further, the number of the engaging rods 48 is not limited as long as the belt sling 8 can be fed out by friction by contacting with the lower surface of the belt sling 8.
[0060]
For example, when the belt sling 8 after zigzag sewing is moved as in this example, the engagement rod 48 is normally moved so that the belt sling 8 can be reliably moved onto the engagement rod 48. Since it suffices to position it downward and displace upwardly intermittently by the rotation of the vertical rotating plate 49, it is only necessary to arrange one or three engaging rods 48 at positions offset in the circumferential direction.
[0061]
8 to 25 show the zigzag sewing machine of this example at each operation stage. FIG. 8 is a right side view corresponding to FIG. 1 (FIG. 8 (unloading device 10 not shown), FIG. 11 (unloading device 10 not shown), FIG. 14 (unloading). 17, FIG. 20, FIG. 23), FIG. 2 equivalent plan view (FIG. 9, FIG. 12, FIG. 15, FIG. 18, FIG. 21, FIG. 24) and FIG. 13, FIG. 16, FIG. 19, FIG. 22, FIG. 25), FIG. 8 to FIG. 10 are the loading stages of the preceding belt sling 81, FIG. 11 to FIG. 13 are the clamping stages of the preceding belt sling 81, and FIG. 16 is the sewing stage of the leading belt sling 81, FIGS. 17 to 19 are the preparing stage for carrying out the leading belt sling 81, FIGS. 20 to 22 are the loading stage of the trailing belt sling 81, and FIGS. Each of the sling 81 unloading stages is shown.
[0062]
The zigzag sewing machine of this example can process the plurality of belt slings 81 and 82 in order by operating the respective units so as to cooperate with each other by providing the carry-in device 9 and the carry-out device 10. Therefore, in order to explain the above-described cooperation, hereinafter, the belt sling that is zigzag-sewn first is referred to as the preceding belt sling 81, and the belt sling that is subsequently zigzag-sewn is referred to as the trailing belt sling 82, and is distinguished.
[0063]
First, at the stage of carrying in the leading belt sling 81, as shown in FIGS. 8 to 10, the moving belts 19, 19 are moved with the leading belt sling 81 held by the buffer cylinder 44 being flush with the main table 1. Picks up the leading belt sling 81 from the buffer cylinder 44, and carries the leading belt sling 81 below the sewing needle 13, that is, onto the feeding portion 2 in a state where the moving chucks 19 and 19 are clamped.
[0064]
The belt slings 81 and 82 may be inserted sequentially into the slits 42 of the buffer cylinder 44 with an insertion device (not shown) or the like, or manually by an operator. Even if it is manual work by an operator, the subsequent carry-in, zigzag sewing and carry-out are automated, so that labor can be greatly reduced as compared with the conventional zigzag sewing that forms the eye part of the belt sling.
[0065]
Further, since the belt sling 81 (82) can be moved in any of the longitudinal directions, it is possible to carry out sensor and the like after carrying in without carrying out strict longitudinal alignment of the belt sling 81 (82) upon carrying in. According to the detection result of the detection means, the feed unit 2 and the traverse unit 3 can be slightly operated to newly set the sewing start position. In order to facilitate the alignment, the positional relationship of the belt sling 81 (82) to be inserted into the slit 42 of the buffer cylinder 44 is specified (the end edge of the folded belt sling 81 (82) It is good to adjust to a specific position).
[0066]
In this carrying-in stage, each guide portion 4 of the traverse portion 3 is separated by driving (1) approaching / separating cylinder (guide approaching / separating means) 34 so that the sandwiching plates 15 and 15 exceed the width of the preceding belt sling 81. (2) The vertical movement base 26 is driven upward by driving a vertical movement cylinder (guide vertical movement means) 33, the sandwiching plates 15, 15 are separated from the main table 1, and (3) a ball screw. (Guiding back-and-forth movement means) 30 is driven to adjust the position of the back-and-forth movement base 25 in the short direction, and the middle of the sandwiching plates 15 and 15 is substantially aligned with the feed section 2 of the main table 1 and waits. Yes.
[0067]
The operation order of each means is not particularly limited as long as the holding of the sandwich plates 15 and 15 is realized. Thereby, each guide part 4 does not obstruct the carrying-in of the preceding belt sling 81 by the moving chuck 19. The moving chuck 19 carries the preceding belt sling 81 onto the feeding section 2, then releases the preceding belt sling 81 and moves in the backward direction (right in FIGS. 8 and 9). Prepare for the descent of each guide in the clamping stage.
[0068]
Next, as shown in FIGS. 11 to 13, the clamping stage of the preceding belt sling 81 is such that the moving chuck 19 lowers the orbiting belt 57, which is a track, and returns to the origin (near the carry-in device 9, FIG. 8 and FIG. 9). Move forward (move to the left in FIG. 10). Since the return of the origin of the moving chuck 19 is irrelevant to the holding of the belt sling 8 by the guide portions 4 and 4, if it can be carried out until the carry-in stage of the trailing belt sling 82, this holding stage is not particularly required. In the example as well, the circulating belt 57 of the moving chuck 19 is raised at the sewing stage of the preceding belt sling 81.
[0069]
Separately from the return of the origin of the moving chuck 19, (1) the longitudinal movement base 25 is left in the short direction position, and (2) the vertical movement base 26 is lowered downward by the vertical movement cylinder (guide vertical movement means) 33 first. The sandwiching plates 15 and 15 and the sliding contact plates 16 and 16 are brought into contact with the main table 1 (see FIGS. 11 and 12), and then (3) the front and rear arms 27 and 28 by the approaching / separating cylinder (guide approaching / separating means) 34. Is moved to bring the sandwiching plates 15 and 15 closer, and the preceding belt sling 81 is sandwiched between the sandwiching plates 15 and 15 from the short side direction (short side direction) (see FIG. 12). The vertically moving cylinder (guide vertically moving means) 33 and the approaching / separating cylinder (guide approaching / separating means) 34 are operated in the order of description ((2) → (3)). The sandwiching plates 15 and 15 that are close to each other avoid interference with the presser plate 6 and the sewing needle 13 that descend from the sewing machine body 5 by the notch 38 (see FIGS. 4 and 5).
[0070]
At the stage of carrying in the leading belt sling 81, both guide portions 4, 4 waited with the intermediate portions of the respective sandwich plates 15, 15 substantially aligned with the feed portion 2 of the main table 1, so the position in the short direction is maintained. The sandwiching plates 15 and 15 that are close to each other can substantially align the center line of the preceding belt sling 81 with the feeding portion, and can adjust the horizontal posture of the preceding belt sling 81 in the extending direction of the sandwiching plate 15, that is, the longitudinal direction. Yes (see Figure 12).
[0071]
In the clamping stage of the preceding belt sling 81, the holding plate 6 descending from the sewing machine main body 5 is not pressed against the belt sling 8, and the zigzag stitch folding direction by the feed teeth 7 of the feeding portion 2 cannot be moved left and right. Since the belt sling 81 is sandwiched between the sandwiching plates 15 and 15, reciprocation in the pitch direction of zigzag sewing is possible.
[0072]
In the subsequent sewing stage of the preceding belt sling 81, as shown in FIGS. 14 to 16, the presser plate 6 of the sewing machine body 5 is lowered to sandwich the belt sling 8 together with the feed dog 7 of the feeding portion 2, and the preceding belt Allows the sling 81 to move left and right. As described above, the preceding belt sling 81 to be carried in is aligned when the preceding belt sling 81 is inserted into the slit 42 of the carrying-in device 9. The sewing start position may be aligned by reciprocating in the direction and the short direction. In this case, various known sensors are used to measure the sewing start position so that the position can be automatically adjusted.
[0073]
Then, after the setting of the sewing start position of the preceding belt sling 81 is completed, (a) the reciprocating motion by both guide portions 4, 4 (the reciprocating motion of the preceding belt sling 81 in the short direction), and (b) the feed The zigzag sewing is executed by operating the sewing needle 13 in accordance with the left-right movement by the teeth 7 (reciprocating movement of the preceding belt sling 81 in the longitudinal direction). The sewing range (length in the turn-back direction, pitch interval, and number of pitches) of the zigzag seam is determined by cooperation between the reciprocating movement of the preceding belt sling 81, the left-right movement, and the vertical movement of the sewing needle 13, and the cooperation is the traverse part 3 The operating conditions of the sewing machine body 5 may be set.
[0074]
Here, since the sewing range in the short direction of the preceding belt sling 81 is defined by the sandwiching plates 15 and 15, automatically by providing a sensor for monitoring the horizontal distance between the sewing needle 13 and the inner surface of each sandwiching plate 15 Can be limited. In addition, the zigzag stitch turn-back end interval is equal to the pitch interval, so setting one may automatically set the other.
[0075]
In the zigzag sewing machine of the present invention, the preceding belt sling 81 can be moved in the longitudinal direction = longitudinal direction of the preceding belt sling 81 indefinitely, and therefore it is desirable that the folding length can be freely changed. From this, it is preferable to first determine the turn-back length, and based on this turn-back length, determine the number of pitches with respect to the gap between the sandwiching plates 15 and 15 holding the preceding belt sling 81 and automatically derive the pitch interval.
[0076]
When zigzag sewing of the preceding belt sling 81 is completed, as shown in FIGS. 17 to 19, as a preparatory stage for carrying out the preceding belt sling 81, the presser plate 6 and the sewing needle 13 of the sewing machine body 5 are retracted upward and traversed. The part 3 moves the preceding belt sling 81 to the carry-out device 10 by moving the forward / backward moving base 25 by the ball screw (guide forward / backward movement means) 30 while holding the preceding belt sling 81 between the guide parts 4 and 4. The preceding belt sling 81 is sandwiched between the sandwiching plates 15 and 15 which are opposed to each other over a long range so as to cross the main table 1, and there is no possibility that the preceding belt sling 81 will deviate due to a large movement of the traverse portion 3.
[0077]
At the same time, the moving chuck 19 that has returned to the origin at the sewing stage of the preceding preceding belt sling 81 is approaching the buffer cylinder 44 again to receive the trailing belt sling 81. Since the preceding belt sling 81 has already been detached from the feed unit 2 and the movement of the preceding belt sling 81 to the carry-out device 10 is performed by the traverse unit 3, the moving chuck 19 can be operated independently. The preceding belt sling 81 thus moved to the carry-out device 10 hangs down from the sub table 17 and extends upward to the engagement rod 48 of the carry-out device 10.
[0078]
Here, the zigzag seam applied to the preceding belt sling 81 is connected to the lower thread 55 extending from the drawing opening 24 of the feeding portion 2 of the main table 1 (see FIG. 18). Due to the connection with the lower thread 55, the leading belt sling 81 is pulled toward the front side of the main table 1 at least, so that it is disengaged from the engagement rod 48 of the carry-out device 10 when released from the clamping by the clamping plates 15 and 15. There is a risk of getting away.
[0079]
Therefore, as shown in FIG. 16, the holding plate 54 of the holding portion 52 provided on the support arm 14 of the traverse portion 3 is lowered by the holding cylinder 53, and temporarily held by the holding plate 54 and the sub table 17 between them. The belt sling 81 is fixed in position. In this example, a holding part 52 is provided for each of the sub-tables 17 and 17 in order to stably hold the preceding belt sling 81. However, at least one holding part 52 may be provided on the carry-out device 10 side. That's fine.
[0080]
In the last unloading stage of the preceding belt sling 81, first, the lower thread 55 must be cut. In this example, the presser plate 6 and the cutter 56 that descends in conjunction with the descending of the sewing needle 13 accompanying the carry-in of the trailing belt sling 82 are provided in the sewing machine body 5, and the lower thread 55 is cut by this cutter 56. Specifically, as shown in FIGS. 23 to 25, first, the preceding belt sling 81 whose position is fixed by the pressing portion 52 is left, and the traverse portion 3 returns the guide portions 4 and 4 to the origin, and the preceding belt sling 81 The trailing belt sling 82 into which the moving chucks 19 and 19 have already been carried is sandwiched by the sandwiching plates 15 and 15 as in the sandwiching step (see FIGS. 11 to 13).
[0081]
Similarly to the sewing stage of the preceding belt sling 81 (FIGS. 14 to 16), when the presser plate 6 and the sewing needle 13 are lowered from the sewing machine main body 5, the cutter 56 is applied to the lower thread 55 extending from the drawing opening 24 to the preceding belt sling 81. Is cut by the operation of the cutter 56 or the tension of the lower thread 55 itself contacting the cutter 56. For the cutter 56, various conventionally known cutting devices or cutting tools can be used.
[0082]
The preceding belt sling 81 released from the lower thread 55 is then released from the pressing portion 52 when the holding plate 54 is lifted by the holding cylinder 53. Then, when the vertical rotation plate 49 of the carry-out device 10 rotates rightward when viewed from the front (see FIG. 25), the engagement rod 48 that makes a circular motion abuts intermittently on the lower surface of the preceding belt sling 81 and enters this free state. A certain preceding belt sling 81 is fed out.
[0083]
The unloading of the preceding belt sling 81 by the unloading device 10 does not have to unload the entire preceding belt sling 81 placed on the main table 1 and the sub table 17. When the preceding belt sling 81 is drawn out to a certain extent, there are no obstacles on the main table 1 and the sub table 17, and the rest falls from the end of the sub table 17 due to its own weight. If a collection box (not shown) is disposed at the position where the preceding belt sling 81 is dropped, all belt slings that are sequentially zigzag-sewn and carried out can be accumulated in the collection box and collected together.
[0084]
As described above, the zigzag sewing machine of the present invention realizes zigzag sewing by moving the feed portion 2 of the sewing machine table 11 left and right and reciprocating the traverse portion 3 without moving the sewing needle 13 of the sewing machine body 5 horizontally. Then, a carry-in device 9 that holds a plurality of belt slings 81 and 82 in advance and can supply them sequentially to the main table 1, and moving chucks 19 and 19 that carry in the belt sling 81 from the carry-in device 9 onto the feed unit 2. And the traverse part 3 responsible for the reciprocating motion of the belt sling 81 and the carry-out device 10 for carrying out the belt sling 81 delivered from the traverse part 3 cooperate with each other in each step of the sewing procedure, so that a large number of belts can be obtained. Slings 81 and 82 can be sequentially zigzag sewn. Thus, the present invention provides a zigzag sewing machine that not only has a simple device configuration but also makes zigzag sewing of a large number of belt slings more efficient.
[0085]
【The invention's effect】
The present invention provides a zigzag sewing machine suitable for zigzag stitching having a sewing range having a large folding length with respect to the pitch. The reciprocation in the longitudinal direction and the short direction of the dough is realized by different movements of the guide part of the traverse part and the feed part of the main table, respectively, and since the reciprocation of each direction can be individually controlled or adjusted, Zigzag stitching with a high degree of freedom can be realized regardless of the length of the folded back.
[0086]
This brings about the advantage of simplifying the configuration of each of the traverse unit and the feed unit that perform reciprocation in each direction and facilitating the control of the movement. In particular, since the feed dog of an existing sewing machine can be used as the feed section, only the traverse section needs to be attached to the existing sewing machine in order to configure the zigzag sewing machine of the present invention. This makes it easy to use the present invention and brings about an effect that an existing sewing machine can be used effectively.
[0087]
Further, in the present invention, the fabric carry-in device before zigzag sewing and the fabric carry-out device after zigzag sewing are operated in cooperation with zigzag sewing by the sewing machine body, so that zigzag sewing of a large number of fabrics is executed sequentially. The effect that can be obtained. This is because the guide part responsible for the reciprocating motion of the fabric in the short direction has a function of assisting the carry-in (positioning, etc.) or carry-out (movement to the carry-out device, etc.) of the fabric just below the sewing needle of the sewing machine body. The burden is particularly large.
[0088]
As can be seen from the above examples, the present invention provides a zigzag sewing machine that is particularly suitable for zigzag stitching of fabric that is folded and overlapped to form the eye part of a belt sling. However, the cloth is not limited to the belt sling, and can be used as long as it is made of a long and thick cloth that can reciprocate in a state of being sandwiched between the guides, for example, a belt for a seat belt. Thus, the present invention has an effect of widely providing a zigzag sewing machine that realizes zigzag sewing having a large sewing range by reciprocating the fabric itself in the longitudinal direction and the short direction.
[Brief description of the drawings]
FIG. 1 is a right side view illustrating an example of a zigzag sewing machine according to the present invention.
FIG. 2 is a plan view of the zigzag sewing machine.
FIG. 3 is a front view of the zigzag sewing machine.
FIG. 4 is an enlarged perspective view of a main part showing a positional relationship between a feeding part of a main table, both guide parts of a traverse part, and a pressing plate of a sewing machine body.
FIG. 5 is an enlarged cross-sectional view of a main part showing the structure and movement of a feed dog.
FIG. 6 is a sectional view in the axial direction of a belt sling carrying-in device.
FIG. 7 is a side view illustrating a belt sling unloading process by the unloading device.
FIG. 8 is a right side view corresponding to FIG. 1 showing a stage for carrying in a preceding belt sling.
FIG. 9 is a plan view corresponding to FIG. 2 showing a stage for carrying in a preceding belt sling.
FIG. 10 is a front view corresponding to FIG. 3 showing a stage for carrying in the preceding belt sling.
FIG. 11 is a right side view corresponding to FIG. 1 showing a stage of clamping a preceding belt sling.
FIG. 12 is a plan view corresponding to FIG. 2, showing the stage of clamping the preceding belt sling.
FIG. 13 is a front view corresponding to FIG. 3, showing the stage of clamping the preceding belt sling.
FIG. 14 is a right side view corresponding to FIG. 1 showing a sewing stage of a preceding belt sling.
FIG. 15 is a plan view corresponding to FIG. 2 showing the sewing stage of the preceding belt sling.
FIG. 16 is a front view corresponding to FIG. 3, showing a sewing stage of a preceding belt sling.
FIG. 17 is a right side view corresponding to FIG. 1 and showing a carry-out preparation stage of a preceding belt sling.
FIG. 18 is a plan view corresponding to FIG. 2 showing a carry-out preparation stage of a preceding belt sling.
FIG. 19 is a front view corresponding to FIG. 3, showing a stage for preparing to carry out the preceding belt sling.
FIG. 20 is a right side view corresponding to FIG. 1 and showing a carry-in stage of a trailing belt sling.
FIG. 21 is a plan view corresponding to FIG. 2 showing a stage for carrying in the trailing belt sling.
FIG. 22 is a front view corresponding to FIG. 3, showing the stage of carrying in the trailing belt sling.
FIG. 23 is a right side view corresponding to FIG. 1 showing a carry-out stage of the preceding belt sling.
FIG. 24 is a plan view corresponding to FIG. 2 showing a carry-out stage of the preceding belt sling.
FIG. 25 is a front view corresponding to FIG. 3 showing the carry-out stage of the preceding belt sling.
[Explanation of symbols]
1 Main table
2 Feeder
3 Traverse
4 Guide Department
5 Sewing machine
6 Presser plate
7 Feed dog
8 Belt sling
9 Loading device
10 Unloader
11 Sewing table
15 Clipping plate
16 Sliding plate
19 Moving chuck
25 Longitudinal base
26 Vertical movement base
30 Ball screw (guide forward / backward movement means)
31 Moving base
33 Vertical cylinder (guide vertical movement means)
34 Approaching / separating cylinder (guide approaching / separating means)
36 Front approaching separation base
37 Rear approach base
42 Slit
43 Cylinder plate
44 Buffer cylinder
45 Cylinder drive motor
48 engagement rod
49 Vertical rotating plate
51 Unloading drive motor
52 Holding part
53 Holding cylinder
54 Retaining plate
81 Leading belt sling
82 Trailing Belt Sling

Claims (2)

A zigzag sewing machine that sews long and thick fabrics firmly and consists of a sewing machine body, a sewing machine table, and a traverse part.The sewing machine body is fixed in a horizontal position, and the cloth table is provided with means for reciprocating the cloth in the longitudinal direction. in di Guzagu sewing machine in which a shorter direction reciprocating means of the fabric respectively the traverse unit, the traverse unit, as a short-side direction reciprocating means dough, the dough was sandwiched from the lateral direction of the fabric, the fabric A zigzag sewing machine comprising a pair of guide portions that reciprocate in the short direction . The traverse section includes a guide approach / separation means that approaches and separates from each other, a guide vertical movement means that approaches and separates from the sewing machine table, and a guide front and back that reciprocates integrally in the short direction of the fabric while maintaining the approach or separation state. and motion means, zigzag sewing machine, respectively according to claim 1, wherein provided in the guide portion.

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