JPS6032472B2 - Clamp-type end-edge sewing device for automatic sewing machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clamp-type joining edge sewing device for an automatic sewing machine.

As an example of the edge-seaming device in a conventional sewing machine, a linear groove is formed in the auxiliary table, a roller runs within the groove, a needle integrated with the roller stops the material, and the needle moves within the premises. There is a known sewing machine that applies tension to the fabric and prevents it from meandering by moving along the grooves along with the fabric in accordance with the running of the roller, thereby performing edge stitching.

However, this conventional device requires a special auxiliary table with linear grooves, is limited to linear movement, and has the disadvantage that the needle that stops the fabric may damage the operator's fingers. The present invention was proposed in order to solve the above-mentioned conventional drawbacks, and is an automatic sewing machine that can easily and reliably sew seams by simply clamping the rear end of the laminated fabric using a clamper. The object of the present invention is to provide a clamp-type mating end total device that can be used.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the entire automatic sewing machine equipped with a clamp-type end-edge sewing device showing an embodiment of the present invention, in which 1 is the sewing machine body, and 2 is the sewing machine. The needle, 3 is a sewing machine table, and 4 is a presser foot, which are well known in conventional automatic sewing machines.

Reference numeral 5 denotes an auxiliary table, which is the same as a conventionally known auxiliary table that is extended so that the laminated fabric 6 sent toward the sewing machine needle 2 can be layered in a straight layer, and is detachable from the sewing machine table 3. The height can be adjusted freely, and a chain 9 connected to a clamper 8 that clamps the rear edge of the laminated fabric 6 is guided at the rear end almost on the seam line passing through the sewing machine needle 2. guide roller 10
is installed.

Further, a weight 11 is connected to the hanging end of the chain 9. The clamper 8 includes a fixing member 12 and an opening/closing member 13 that are pivotally supported at the center by a pin 14 and a spring 15.
The clamp part 16 is always closed and the opening/closing part 17 is open, so that it has the shape of a general clothespin type clip, and when the presser part 3a bent upward at the rear end of the opening/closing member 13 is pressed in the direction of arrow A. The clamp portion 16 is opened against the force of the spring 15. Further, the chain 9 is connected to the rear end of the fixing member 12 via a hook 8. 19
is a swing gauge, the detailed structure of which is shown in Figures 2 and 3. When switching from automatic warp sewing to manual sewing, such as force-wave sewing, It is now possible to evacuate from the road.

The main body of this swing gauge turtle 9 is a first guide plate 21, a second guide plate 22, and a third guide plate 23, which are provided in parallel with each other at intervals such that the fabric 6 can be fin-shaped from the top. 1 A roller type micro switch 2 is installed on the guide plate 21.
4 is installed, and the "second" and third guide plates 22, 23 are installed.
It can be opened and closed up and down as indicated by arrows C to O around a hinge part 25 fixed to . Further, the second and third guide plates 229 and 23 are integrally formed and placed on the sewing machine table 3, and the guide plate 26 extending rearward is connected to the pin 20 by a screw 29 through an elongated hole 27. It is fixed to a swing arm 28 that can rotate.

In addition, the front and back positions of the first, second and third guide plates 2, 22 and 23, that is, the distance from the needle center 30 to the side edge of the matching fabric 6, and the adjustment of the blocking seam allowance 1, can be adjusted by loosening the screw 29 on the guide plates. 26
Do this by moving back and forth. Roller type micro switch 24
A swingable arm 32 having a loaf 31 at the tip protrudes downward, and is closed when the roller 31 is supported by the dough 6 as shown in FIG. 2, but when the dough 6 is below. When the arm 32 goes down as shown in FIG. 3 and falls through the hole 22a of the second guide plate 22, the switch opens and the sewing machine stops operating.

In this case, if it is necessary to continue sewing to the end of the laminated fabric 6, a timer (not shown) is used to keep the sewing machine running for a predetermined period of time. 33 is a conductor connected to the power source from the microswitch 24; 34 is an opening/closing lever that opens and closes the first guide plate 21; and 35 is installed on the movement line of the clamper 8 so as to be placed on the rear upper surface of the second guide plate 22. The unclamping roller contacts the holding part 13a of the clamper 8 and pushes it downward in the direction of arrow A to open the clamping part 16, and is pivotally supported at the tip of the roller bracket 36.

Next, to explain the operation, first, hold the opening/closing lever 3 by the hook and open the first guide plate 21 in the direction of arrow D in FIG. Place the lower unit on the third guide plate 23 and align its side edge 6a with the closed side wall 37 of each guide plate.
Next, when the first guide plate 21 is rotated in the direction of arrow C and closed, the roller 31 is supported by the fabric 6, and the microswitch 24 is in a closed state. Next, combine fabric 6
Attach the rear end to the first groove of the clamp part of the clamper, run the chain 9 along the guide loaf, and then drop the weight sergeant.

In this state, when the start switch of the sewing machine motor (not shown) is pressed, the sewing machine needle 2 moves up and down, and the feed dog 3 (Fig. 6) moves up and down and back and forth to perform automatic sewing like a general sewing machine. The combined fabric 6 is automatically fed in the direction of the arrow, the clamper 8 follows and moves in the same direction at the same time, and the chain 9 is guided and pulled by the guide roller 1 to pull up the weight 11. The seam edge sewing of the overall width 1 is automatically performed.As the sewing of the seam fabric 6 approaches the terminal end, the front part of the clamper 8 passes under the unclamp roller 36, and the presser foot 13a touches the roller 35. When this happens, the qler 35 presses in the direction of arrow A, so that the clamp portion 16 that has been holding the rear end of the combined fabric 6 opens, and the engagement between the clamper flea and the fabric 6 is interrupted. It comes off.

Therefore, the weight 11 is connected via the clamper chain 9.
When the weight 11 reaches the floor, it moves backwards and stops, preparing for the next operation.On the other hand, even if the weight 11 leaves the cloth parlor 8, it continues to move forward while being sewn, and its rear end When the roller 31 of the switch 24 passes through the hole 22a of the second guide plate 22, the roller 31 passes through the hole 22a of the second guide plate 22.
The switch opens and the sewing machine motor stops, stopping the sewing machine's needle movement.

In this case, the sewing is not done to the end, so if it is necessary to sew to the end, set up a timer so that the sewing machine motor continues to run for a predetermined period of time, until the end of the laminated fabric is sewn. It is also possible to sew continuously. Further, the sewing start position can be adjusted by first setting the laminated fabric so that the sewing machine needle is positioned at the sewing start part. Next, if you want to move from automatic straight line sewing to manual sewing of curved lines, stop the sewing machine, rotate the swing gauge 19 using the pin 20 as a fulcrum to remove it from the path of the fabric 6, and then continue manually sewing the curved lines. Perform sewing.

In addition, fabric confirmation was done by opening and closing a microswitch depending on the position of the microswitch roller, but instead of this roller type microswitch, a light emitter and a light receiver were installed, and when there was no fabric, the fabric could be checked on the sewing machine table. The light receiver may receive light from the projector using a reflective plate provided to check the presence or absence of fabric, and then stop the sewing machine motor. Further, in the embodiment, only two pieces of fabric were used, but it is also possible to add guide plates and sew three or four pieces of fabric. As explained in detail above, the present invention merely clamps the rear end of the laminated fabric sent on the auxiliary table with a clamper, and the clamper is pulled by a weight attached to a connected cable. Appropriate tension is applied to the laminated fabric, it is automatically fed without meandering, and the laminated edge sewing can be performed automatically.

Also, when the end of sewing approaches, the presser foot of the clamper is pressed by the unclamp roller and the clamp opens, and the clamper, which is separated from the fabric, is pulled by the weight through the fabric and moves backwards, automatically returning to its original position. Therefore, there is no need for a person to take unnecessary effort such as removing the needle from the fabric as in the past, and the person only needs to attach the clamper to the rear end of the fabric at the beginning of the set. Therefore, according to the present invention, there is no need to perform any special processing on the auxiliary table, and the clamper is automatically removed.
If a fabric confirmation sensor is installed to automatically stop the sewing machine, it is possible to perform edge stitching fully automatically except for attaching the clamper. Further, the unclamp roller in the present invention is installed on the rear side of the clamper running path near the sewing machine needle, and is attached to the clamper on a swing gauge that can move in a direction perpendicular to the moving direction of the laminated fabric to adjust the seam allowance. Since it is installed so that it is located on the running path, it is possible to freely adjust the seam allowance for the edge seams of the laminated fabric.
Even if you adjust the swing gauge to adjust the seam allowance like a parenthesis and move it in a direction perpendicular to the direction of movement of the fabric, the unclamp roller is always located on the clamper travel path, so the clamper can be unclamped reliably. be able to.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an automatic sewing machine equipped with a clamp-type end-edge sewing device showing an embodiment of the present invention, and Fig. 2 shows × to x in Fig. 1.
3 is a Y-Y sectional view of FIG. 1, FIG. 4 is a rear sectional view showing details of the unclamp roller, FIG. 5 is an enlarged side view of the clamper, and FIG. It is an enlarged perspective view of the main part in a figure. Explanation of the main parts of the drawing, 2... Sewing needle, 5... Auxiliary table 6... Laminating fabric, 8... Clamper, 9
...Chain (subject), 11... weight, 1
3... Opening/closing part village, 13a... Presser part, 35""" Unclamp loaf. Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A cable is connected to a clamper that clamps the rear end of the laminated fabric on an auxiliary table on which the laminated fabric is stretched and placed, and the cable is suspended from the auxiliary table and a weight is attached to the tip thereof, When the clamper moves in the direction of the sewing machine needle, the weight is pulled up, and when the clamper is removed from the laminated fabric, the weight is lowered so that the clamper returns to its original position, and the rear end of the opening/closing member of the clamper is bent upward. An unclamp roller that presses the presser foot to open the clamper is installed on the rear side near the sewing machine needle on the travel path of the clamper, and moves in a direction perpendicular to the direction of movement of the laminated fabric. 1. A clamp-type end-edge sewing device for an automatic sewing machine, characterized in that the device is mounted so as to be located on the clamper travel path on a swing gauge whose seam allowance can be adjusted.