JPS6022955B2 - Cloth feed mechanism of cycle sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cloth feed table having a cloth holding section corresponding to the sewing section of a sewing machine in which the needle moves up and down, in the longitudinal direction (back-and-forth direction) of the sewing machine pet and in the direction perpendicular to the longitudinal direction ( This invention relates to a fabric feeding mechanism of a cycle sewing machine which is configured to horizontally reciprocate in the left and right directions to form intersecting stitches of the same size at two locations on the fabric.

As a secondary feature, there is a zigzag neck interlacing stitch as shown in Figure 1, which is a general interlock stitch, and the sewing size is such that the finished stitch size A in the vertical direction is within about 3 ribs, and the stitch size in the horizontal direction is The rising dimension B is within about 2 ratios.

The cloth feeding mechanism of this type of cycle sewing machine (e.g. Tsubaki Kimisho 53-27660) reciprocates the cloth feed table in the longitudinal direction of the pet (vertical feeding), and also rotates the cloth in a fan shape along the flat surface of the pet around a fixed axis. The cloth holding section of the cloth feed table is moved by a predetermined amount to form a stitch. However, this method is inconvenient for simultaneously forming the same seams C and D at two locations on the waist G of pants using a two-needle sewing machine, such as when sewing a band loop as shown in FIG. 2, for example. This is because in these conventional methods, the fabric feed table swings in a fan shape along the pet plane around a fixed axis. This is because the stitches that are left are longer in the horizontal direction.Therefore, in the past, in order to sew the same seam in two places on a cloth, it was necessary to sew each place twice.

The present invention uses a two-needle sewing machine to sew the same seam at two locations on a cloth at the same time.

In addition, as shown in FIG. 4 in the cycle sewing machine 1' which is the basis of the present invention, "the throat plate 3 provided on the horizontal surface of the pet 2 has a groove along the longitudinal direction (back and forth direction) of the pet". Two needle holes 4 and 5 are formed separately, and lower thread bobbins 7 and 9 are housed on the lower surface of the needle plate 3 on the outer side of the two needle holes 4 and 5 in the front and back direction. Two horizontal hooks 6 and 8 are provided in close proximity to the needle holes 4 and 5, respectively, and a needle stock 12 fixed to the needle twill holder 1 of the arm 10 is provided at the front and rear ends of the needle plate 3. Two needles 13, 14 are provided corresponding to the needle holes 4, 5, and the needles 13, 14 penetrate through the needle holes 4, 5 and move up and down. The horizontal hooks 6 and 8 are configured to rotate together in the horizontal direction to form stitches at two locations at the same time.An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 4, the present invention includes a cloth feeding cam 15 that rotates at a reduced speed in conjunction with the rotation of the upper shaft of a cycle sewing machine 1 (hereinafter simply referred to as "sewing machine") having two needles 13 and 14. A swinging lever 20 having an arm extending vertically is arranged on the rear side, and the swinging lever 20 is rotatably supported via a horizontal shaft 25 on a support base 19 fixed to the lower rear side of the arm 10.

A cam roller 21 is provided at the tip of the arm extending upwardly of this swing lever 20, and the cam roller 21 is rotatably inserted into a cam groove 16 formed on the side surface of the cam 15. , an arcuate hole 22 is formed through the arm extending downward along the longitudinal direction of the arm;
This elongated hole 22 is connected to a connecting birch 2 which is arranged in parallel in the front-rear direction along the side surface of the pet 2 via a stepped nut 23 and a sliding bearing 27 inserted into the elongated hole 22 so as to be movable.
The rear end of 6 is fixed with a screw 24. The front end of the connecting rod 26 is fixed to the rear side of the upper end of a swinging arm 30 arranged upright on the side of the pet 2 with a screw 29 via a sliding bearing 28. The lower end of the bearing 33 of the lower parallel part of the pet 2 is a rotating shaft that is parallel to the horizontal upper surface 2a of the pet and in a direction (left and right) perpendicular to the longitudinal direction of the pet (front-back direction). 3
It is fixed to one protruding end of 2.

An upright swinging arm 35 is fixed to the other end of the shaft 32 protruding from the other side of the pet with bearings 33 and 34 sandwiched between it and the swinging arm 3Q. It is configured to swing in conjunction with the swinging arm 30 while stopping the swinging in the direction, and furthermore, "the upper ends of both swinging arms 38 and 35 are each provided with a koji line parallel to the rotating shaft 32. Through holes 319 and 36 are provided which correspond to the holes 31 and 36.
, 36, a slide shaft 37 is slidably inserted therein.

At the center of the slide shaft 37 between the through holes 31 and 36, there is a bearing 4 whose rear part protrudes upward in a bifurcated shape.
A feed stand 40 having 29 and 43 is fixed, and the feed stand 40 is loaded on the horizontal upper surface 2a of the pet 2 in a manner that it can be moved freely. The feeding platform 40 is slidably mounted on the lower surface of the L-shaped guide plate 38, which allows the feeding platform 40 to move along with the slide shaft 37 along with the bag line while being guided by the guide plate 38 on the horizontal upper surface 2a of the pet 2. Direction (left/right)
It is also possible to horizontally move the pet in the longitudinal direction (back and forth direction) by slightly swinging the swinging arms 30 and 35.

That is, the distance from the rotating shaft 32 of the swinging arms 30, 35 to the sliding holes 31, 36 is set to approximately 7 mm in the embodiment. 36 is controlled by the cam 15 to swing in a maximum of three directions around the rotating shaft 32, and accordingly, the slide shaft 37 performs a three-legged arc movement along the longitudinal direction of the pet. The amount of vertical displacement of the slide shaft 37 with respect to the pet horizontal upper surface 2a due to the circular arc movement is approximately 0.
．． Therefore, it is an amount that does not mechanically affect the horizontal movement of the feeder 40 fixed to the slide shaft 37 by three legs on the horizontal upper surface 2a of the pet 2.

Therefore, by slightly swinging the swing arms 30 and 35, it is possible to horizontally move the feed platform Yotsukawa Mape in the longitudinal direction (back and forth direction). On the other hand, below the outer periphery of the cam 15, a swinging lever 45 for horizontal feeding having an arm extending back and forth in the longitudinal direction of the pet is disposed, and this swinging lever 45 is attached to a vertical shaft 53 on the horizontal upper surface 2a of the pet 2. The arm 46 is supported so as to be horizontally rotatable via the cam 15, and the rear arm 46 extends to just below the outer periphery of the cam 15, and a cam roller 47 is provided at the tip of the arm 46. The cam groove 17 is rotatably inserted into the cam groove 17.

Further, the forearm portion 48 extends to the side of the feed base 40, and an arc-shaped elongated hole 49 is formed through the front half of the forearm portion 48 in the front-rear direction. A step screw 50 with a bar is inserted so as to be able to slide and adjust, and the step screw 50 is fixed at a desired position in the long notch 49 with a nut 52.The hanging shaft 51 of the step screw 50 is attached to the slide shaft. One end of a plate-shaped link 55 arranged substantially in parallel along 37 is rotatably connected, and the other end of the link 55 is rotatably connected to the upper surface side of the feed table 40 with a step screw 56. In addition, 58,5 in the figure
Reference numeral 9 denotes guide rollers that are in contact with both sides of the cam 15 at the location where the cam roller 47 of the swing lever 45 is inserted, and the upper end of the forked holding base 57 fixed to the horizontal upper surface 2a of the pet 2. When the cam roller 47 travels in the meandering cam groove I7 due to the rotational movement of the cam 15, this prevents force from acting in the direction of the camshaft 18 and causing cam deflection. There is.

Further, a horizontal shaft 60 is rotatably inserted between the bearings 42 and 43 of the feeding table 40, and two horizontal shafts 60 between the bearings 42 and 43 are arranged parallel to each other along the longitudinal direction of the pet. The elongated presser arm 61, ? The rear ends of the presser arms 61 and 71 extend forward from the rear ends of the presser arms 61 and 71, passing above the feed base 40 in a substantially horizontal manner. Afterwards, in order to avoid disturbing the loading and unloading of the bobbin thread bobbin 7, the sewing machine 1 is moved in the longitudinal direction (back and forth direction) by detouring to the side of the pet to avoid the upper part of the horizontal hook 6 at the rear.
It extends to the sides of each of the two needles 13 and 14 arranged in
is fixed. The presser feet 62 and 72 extend almost parallel to each other right below the needles 13 and 14, and have penetrating holes formed at their tips corresponding to the two needle holes 4 and 5 provided in the needle plate 3 of the pet 2. Elongated holes 63 and 73 are formed, and serrations 64 and 74 for preventing fabric slippage are formed on the lower surface of the tips thereof. Note that the length of the presser foot 66, 76 is the same as that of the pivot support 86, 87.
In the embodiment, the length from the part to the lower end is set to about 280 degrees, and the tip is designed to rise about 15 degrees by the cylinders 67, 77. Gold 62,72 and tension spring 69,7
9, and by the action of the tension springs 69, 79, the presser feet 62, 72 are always connected to the presser feet 66, 76, and when the presser feet 66, 76 rise, the upper surface of the throat plate 3 Simultaneously rise to 15/upstream positions. Further, the countersinks 65, 75 of the presser feet 62, 72 have an angle wider than the Taber angle of the lower ends of the presser bars 66, 76, as shown in the cross-sectional shape of FIG.
2 are provided with mortar-shaped countersinks 65 and 75, respectively, and conical presser rods 66 and 76, which are independently suspended from the sides and front of the arm 10, are inserted into the countersinks 65 and 75, respectively. The lower ends of the presser rods 66 and 76 are inserted into the upper ends of the presser bars 66 and 76, respectively, and the upper ends of the presser bars 66 and 76 are hanging cylinders that are independently self-centeringly supported at the side and front ends of an L-shaped base 85, respectively. The conical tips of the presser feet 66, 76 are fixed to the ends of the cylinder shafts 68, 78 of the presser feet 67, 77, even if the presser feet 62, 72 are horizontally moved by the rotation of the cam 15. is always countersunk 65, 75
The hanging cylinder 67 is in point contact with the bottom of the cylinder 67.
, 77 so that even if the presser feet 62, 72 are pressed down, their free horizontal movement will not be prevented.

Since the present invention is constructed as described above, for example, when it is used in a sewing machine exclusively used for sewing band loops, as shown in FIG.
When the starting switch is turned on, the tape bending and supplying device (not shown) for forming a band loop operates, and the tape T with both ends bent is placed from above the rock of pet 2.
It is fed so that both ends thereof are directly under both presser feet 62 and 72.

Therefore, the cylinder shafts 68, 78 of the hanging cylinders 67, 77 shown in FIG.
, 76, the presser feet 62, 72 are lowered to press both bent ends of the tape T and the pants waist G.

Next, the sewing machine is started, operating the needle hook 1 and the horizontal hooks 6 and 8, and also rotating the rear cloth feed cam 15.

As a result, the swinging lever 28 swings in the direction of the arrow X about the horizontal axis 25 according to the cam groove 6 through the cam roller 21 inserted into the cam groove 16 on the side surface of the cam 15. The swinging arm 35 is swung in the direction of the Y arrow around the rotating shaft 32, and the slide shaft 37 is also swung in the same way.As a result, the cloth feeding table 40' is moved horizontally in the longitudinal direction (back and forth direction) of the pet. , move the presser arms 61, 71 and the presser feet 62, 72 at the same time to release the presser bar 66.
, 16, the tape T is pressed by the presser foot 62,
Then, the waist part G of the pants is moved horizontally in the longitudinal direction of the pet relative to the needles 13 and 14. At this time, the presser rods 66, 76 and the hanging cylinder S? , Ryo 7 swings in the longitudinal direction of the pet around the pith 86, 87 due to the horizontal movement of the presser feet 82, 72, and may press the presser feet 62, 72 with a slightly diagonal light, but the angle of the inclination is Since it is about 18 minutes maximum in the vertical direction, the presser foot 6 corresponds to the left and right movement of the presser feet 62 and 72.
6, 76, the lateral pushing force when holding it diagonally is very small and does not pose any problem.

In addition, the back and forth feeder for the needles 13 and 14, that is, the feeder 4
To adjust the amount of movement of the pet in the longitudinal direction to a desired value, the screw 24 may be loosened, the stepped nut 23 and the slide bearing 27 may be moved the desired amount along the elongated hole 22, and the screw 24 may be tightened again.

On the other hand, due to the rotation of the cloth feed cam 15, the cam groove 1 on the outer circumference of the cloth feed cam 15 is
The swing lever 4 is moved through the cam roller 47 inserted into the
5 swings horizontally in the Z arrow direction around the vertical axis 53,
Push and pull the plate link 55 in the left and right direction to move the cloth feed table 40
is horizontally moved along the through holes 31 and 36 of the swing arms 30 and 35 together with the slide shaft 37 in the left and right direction.

As a result, the presser arms 61, 71 and the presser feet 62, 72 are moved to move the tape T pressed by the presser feet 62, 72 and the pants waist G to the needles 13, 14 via the pressers 66, 76. Move horizontally in a direction perpendicular to the longitudinal direction. At this time, presser feet 66, 76 and presser cylinders 67, 7
7 swings in a direction perpendicular to the pet's longitudinal direction, and may press the presser feet 62 and 72 while holding the pet at a slight angle. Presser foot 66, 7 for left and right movement of 62, 72
The lateral pushing force when holding it diagonally (6) is very strong and does not pose any problem.

In addition, the left and right feed amount for the needles 13 and 14, that is, the feed base 4
To adjust the amount of movement in the direction orthogonal to the longitudinal direction of the pet as desired, loosen the nut 52, move the step screw 50 with a bumper along the plate link 55 by the desired amount along the elongated hole 49, and then adjust again. Just tighten nut 52.

In this embodiment, a cycle sewing machine having two needles has been described, but it goes without saying that the present invention can also be applied to a cycle sewing machine having one needle.

As described above, according to the present invention, the cloth feeding cam 15 swings the swinging lever 20 and the turtle 5 through the cam roller 21 and the cam roller 47 to move the feeding table 4Q in the longitudinal direction (back and forth direction) of the pet. "Alternatively, in addition to moving the fabric in a direction perpendicular to its longitudinal direction (left-right direction), by a combination of these movements, the fabric can be moved as desired to the seam part of the two needle hooks 3 and 14 that move up and down at a fixed position. It is possible to form the same seam at the same time on the knitted part of the cloth.

Further, in the present invention, especially when horizontally moving the feed table 40 in the left and right direction, a cam groove 17 is formed on the outer peripheral surface of the cloth feed cam 15, and one swing lever that can swing horizontally is formed on the lower surface of the cam 15. A cam roller 47 provided at one end of the swing lever 45 is engaged, and the cam roller 47 is moved horizontally to directly transmit the movement of the cam roller to the other end of the swing lever 45, thereby directly moving the feed base 40. Therefore, there is no need to provide an L-shaped drive arm for changing the movement of the swinging arm that swings in the vertical direction in conjunction with the cloth feed cam 15 into a swinging motion in the horizontal direction, which is the case with the present invention. The connecting means has a small number of parts and its mechanism is simple, so it has long durability and can be manufactured at low cost.The upper and lower parts of the presser feet 62 and 72 and presser pressure can be easily controlled using two cylinders and two shafts. Moreover, since it can be applied directly to the presser feet 62, 72, unnecessary resistance is not applied to the cloth feeding mechanism, which has the effect of increasing the durability of the cloth feeding mechanism.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a needle movement diagram of a cycle sewing machine, Fig. 2 is a partial perspective view of the tape sewn as a band loop on the waist of pants, and Fig. 3 is an embodiment of the present invention. FIG. 4 is a perspective view of the fabric feed mechanism of the present invention attached to a cycle sewing machine, and FIG. A partial sectional view showing a state in which the tip of the presser foot is in contact with the countersink of the presser foot. In the figure, 1 is a cycle sewing machine, 3 and 14 are needles, 15 is a cloth feed cam, 16, ]7 is a cam register, 2 is a swing lever, 2
6 is a connecting rod, 37 is a slide shaft, 40 is a feed base, 45 is a swing lever, 55 is a link, 60 is a horizontal axis, 6
1,71G presser arm, 62,72 is presser foot, 65,7
5 is a countersink, 66 and 76 are push rods, 67 and 77 are cylinders, and 69 and 79 are tension springs. O Figure 2 Figure 3 Figure 3 *

Claims (1)

[Claims] 1. A cam groove 16 is provided on the side surface and outer peripheral surface of the cloth feeding cam 15 that rotates at a reduced speed in conjunction with the rotation of the upper shaft of the cycle sewing machine 1.
, 17, and is disposed between the cam 15 and the needle and is slidable in the left-right direction via a swinging lever 20 provided vertically by a cam groove 16 on the side and a connecting rod 26 provided in the front-rear direction. A cam at the rear end of a swinging lever 45 provided horizontally at the lower end of the cam groove 17 on the outer circumferential surface is used to move a feed base 40 that is fixed to a slide shaft 37 and is horizontally movable back and forth and left and right. The feed table 40 is engaged with a roller 47 and linearly moves left and right through a link 55 at its tip, and the feed table 40 has a rear end of a presser arm having a cloth presser foot at its tip. The presser foot is supported by a horizontal shaft 60, the presser foot faces below the needle, and a countersink hole 65 is provided on the upper surface of the presser foot 62. Suspended hanging cylinder 67
The cloth feeding mechanism of a cycle sewing machine is characterized in that the lower end of a push rod 66 which can be appropriately pressed is exposed, and the push rod 66 and a presser foot 62 are constantly pressed together by a tension spring 69. 2. In a cycle sewing machine 1 having two needles 13 and 14 spaced at a constant interval in the front-rear direction, a cam groove 16 is formed on the side surface and outer circumferential surface of a cloth feeding cam 15 that rotates at a reduced speed in conjunction with the rotation of the upper shaft of the sewing machine 1. , 17, and is arranged between the cam 15 and the needle 13 and slides in the left-right direction via the swing lever 30 provided vertically by the cam groove 16 on the side and the connecting rod 26 provided in the front-rear direction. Possible slide shaft 37
The feed table 40, which is fixed to and is horizontally movable back and forth and left and right, is moved back and forth, and the cam roller 47 at the rear end of the swing lever 45, which is provided in a horizontal state, is engaged with the lower end of the cam groove 17 on the outer peripheral surface. The feed table 40 is provided with a presser arm 6 having cloth presser feet 62 and 72 at its tips.
The rear ends of the needles 1 and 71 are rotatably supported by a horizontal shaft 60, and the cloth presser feet 62 and 72 are held by the presser arms 61 and 71.
Countersinks 65 and 75 are provided in the upper surfaces of the presser feet 62 and 72, and the sewing machine arm 10 is provided with pivot supports 86 and 75 independently and self-aligningly in the countersinks 65 and 75, respectively.
The lower ends of the push rods 66, 76, which can be pushed appropriately by the hanging cylinders 67, 77, are exposed, and the push rods 66
, 76 and presser feet 62, 72 are constantly pressed together by tension springs 69, 79.