JPS6048193B2 - Tatami floor transfer device for tatami sewing machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to a tatami bed transfer device for a tatami sewing machine.

In the tatami manufacturing process, after sewing both ends of the tatami face to the stile of the tatami floor, the above-mentioned drying machine is used to sew the continuous and under-edge parts to the upper surface of both ends of the tatami face, overlapping the inside and outside sides. It is known that a tatami floor with a tatami mat attached to it is fixed on a tatami stand, and a sewing machine is run along the side edge of the tatami floor (see Publication No. 51-28807).
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However, in the above-mentioned known drying machine, the tatami floor is fixed to the tatami stand and the sewing machine runs, and since the sewing machine is installed only on one side of the tatami stand, it In order to dry the tatami, it was necessary to make two reciprocations of the sewing machine and to attach and remove the tatami mats each time, making it impossible to process a large number of tatami mats continuously. In order to eliminate the above-mentioned drawbacks, the applicant first set up two sewing machines facing each other, and supplied a tatami floor between the two sewing machines to simultaneously sew the left and right parts such as drying. We developed a tatami sewing machine capable of carrying out this process, and proposed the device shown in Fig. 1 as a tatami bed transfer device that can be used with this tatami sewing machine (Japanese Patent Application No. 57-97261).
(see specification). In other words, the transport direction j of the tatami floors A and B (
A large number of rollers 1a are arranged along the direction of arrow P) to form a guide support stand 1 for the tatami floors A and B, and endless chains 2 and 3 are arranged in parallel in two rows on each of the left and right sides of this guide support stand 1.
A pair of inner chains 2, 2 located on the inside of a total of four rows and a pair of outer chains 3, 3 located on the outside of the gate are respectively straddled over the above-mentioned guide support 1, and the rear side An inner connecting rod 4 and an outer connecting rod 5 each having a plurality of needles (not shown) projecting backward are attached to the inner chain 2 and outer chain 3, respectively, and the inner chain 2 and the outer chain 3 are individually driven.
Between the rear surface of the inner connecting rod 4 and the tatami pushing rod 5a attached to the outer connecting rod 5, and between the rear surface of the outer connecting rod 5 and the tatami pushing rod 4a attached to the inner connecting rod 4. The tatami beds A, B are held alternately between the tatami beds A, B and the needles of the tatami push rods 4a, 5a are pierced into the front ends of the tatami beds A, B to stop the swinging of the front ends of the tatami beds A, B. is transferred in the direction of arrow P,
The left and right sewing machines 6 and 7 are used to simultaneously sew the left and right sides. In addition, the left edge of tatami floors A and B is a guide (
The sewing machine 6 on the left side is fixed, and the sewing machine 7 on the right side automatically moves forward and backward in the width direction according to changes in the width of the tatami floors A and B. . In addition, the inner chain 2 and the outer chain 3 are rotated intermittently to transfer the tatami beds A and B in synchronization with the movement of the sewing machine needles 6a and 7a, and the sewing machine needles 6a and 7a are rotated intermittently by the action of the drive mechanism 8, respectively. Continuous rotation is performed to rapidly advance the tatami floors A and B regardless of the movement of the tatami floors A and B. However, in the proposed tatami bed transfer device, only the inner connecting rod 4 and its tatami pushing rod 4a1 or the outer connecting rod 5 and its tatami pushing rod 5a are interposed between the tatami beds A and B. Front and rear tatami floor A
, B is smaller than the distance D between the needle 7a of the sliding sewing machine 7 and its exit from the tatami bed, so that the connecting part of the tatami bed A, B-, that is, the inner connecting rod 4 or the outer connecting rod 5, is connected to the left and right sewing machines. When passing between 6 and 7, if the front and rear tatami beds A and B are of different sizes and there is a large dimensional difference in width that is greater than the depth of the sliding sewing machine 7 (for example, 10 cm), the Tatami floor of the size! There was an inconvenience that the lower step portions of the sliding sewing machines 7 on the right side of A and B were in contact with each other and could no longer be followed. The same applies if the sewing machines 6 and 7 are for stilt stitching, the tatami beds A and B are transferred in the width direction, and one of the tatami beds A and B that follows is the size of half a tatami mat. In such a case, continuous operation was stopped and the supply of tatami flooring was delayed by one tatami floor. The present invention solves the above-mentioned disadvantages and provides a tatami bed transfer device that can be used in a tatami sewing machine such as a sash sewing machine that undergoes large dimensional changes.

4. That is, the present invention provides a tatami sewing machine that simultaneously performs stile stitching, flat stitching, or backstitching on the left and right sides of the tatami bed by sewing machines on both the left and right sides in the transport direction while moving the tatami bed straight in the width direction or length direction. Two rows of endless chains are arranged in parallel on each side of the guide support stand for the tatami bed installed along the transport direction of the tatami bed, and one pair is located inside of the total of four rows of endless chains. The inner chain and the pair of outer chains located on the outside are each equipped with a rear push rod that contacts the rear surface of the front tatami floor, and a front presser that contacts the front surface of the following tatami floor and has a needle facing backwards, with the distance between the two being above Install it so that it is slightly wider than the distance between the needle of the sewing machine and the exit of the tatami floor, drive the inner chain and outer chain individually in one direction, and connect the front presser of the inner chain and the rear push rod of the outer chain. There is a tatami bed transfer device for a tatami sewing machine, characterized in that the tatami bed is sandwiched and transferred between the front presser of the outer chain and the rear push rod of the inner chain. In FIG. 2, a first inner connecting rod 9 and a second inner connecting rod 10 are attached to a pair of left and right inner chains 2, 2 with a slight distance in front and rear, and a pair of left and right outer chains 3, 3 are attached to a pair of left and right inner chains 2, 2.
A first outer connecting rod 11 and a second outer connecting rod 12 are attached at a slight distance from each other in the front and rear.

As shown in FIGS. 3 and 4, the first inner connecting rod 9 has its left and right ends connected to the outer chains of the inner chains 2, 2 via L-shaped fittings 2a, 2a and columnar fittings 2b, 2b. 3, 3, so as to straddle the roller 1a (guiding transfer table 1), and at the center of the upper surface of this first inner connecting rod 39, the tatami floor B located in front of it is attached. A central protrusion 13a of the rear push rod 13 that engages with the rear end is swingably attached to a vertical support shaft 14, and both left and right ends of the rear push rod 13 and the first inner connecting rod 9 are connected to each other. Upper surface protrusions 9c protruding from the left and right upper surfaces of the
Coil springs 15, 15 are compressed between the coil springs 9c and 9c. Moreover, the second inner connecting rod 10 (see FIGS. 3 and 5)
) is fixed to the inner chains 2, 2 via the L-shaped metal fittings 2a, 2a and the columnar metal fittings 2b, 2b, similar to the first inner connecting rod 9, and is attached to the upper left and right sides of the second inner connecting rod 10. is the front presser 1 that engages with the front surface of the rear tatami floor A.
0a and 10a are provided in a protruding manner, and a plurality of needles 10b are implanted in the front face holder 10a facing backward. The distance L between the front surface of the rear presser foot 13 and the rear surface of the front presser foot 10a is the distance D between the needle 7a of the sliding sewing machine 7 on the right side and the exit of the tatami floor.
(See Figure 2). On the other hand, the first
The outer connecting rod 11 and the second outer connecting rod 12 are attached to the outer chain 3 by means of L-shaped fittings 3a shown in dotted lines in FIGS. 4 and 5, respectively.
It is constructed similarly to the inner connecting rod 9 and the second inner connecting rod 10. In the above structure, as shown in FIG. 2, the front presser 10a of the second inner connecting rod 10 engages with the front end of the tatami floor A, and the needle 10b pierces, and the rear end of the tatami floor A is connected to the first outer connecting rod. When the rear push rod of the rod 11 is engaged, both the inner chain 2 and the outer chain 3 are intermittently rotated in synchronization with the sewing machines 6 and 7, and the tatami floor A is transferred by sewing pitches, and the sliding The movable sewing machine 7 moves forward and backward in the width direction according to the shape of the right edge (lower front) of the tatami floor A. At this time, since the needle 10b of the second inner connecting rod 10 is stuck into the front end of the tatami floor A,
The front end of the tatami floor A is prevented from swinging, the sewing machine needle is not broken, and the sewing line is formed parallel to the side edge of the tatami floor A without distortion. As the sewing progresses and the first inner connecting rod 9 reaches the sending end of the inner chain 2 (the upper end in FIG. 2), the first inner connecting rod 9 rotates below the sprocket (towards the back of the paper) and faces the rear side. The push rod 13 moves away from the front tatami floor B, and then the second inner connecting rod 10 moves below the sprocket, and along with this, the needle 10b of the second inner connecting rod 10 is pulled out from the front end of the tatami floor A. Thereafter, this tatami floor A is sewn while being fed only by the outer connecting rod 11 with the needle 10b removed from the front end. However, since the latter part of the tatami floor A is being sewn at this time, the amount of movement of the sewn part is very small, and there is almost no chance of the sewing machine needle breaking or the sewing line being bent. . The rear end of the above tatami floor A (7) is the sewing machine needle 6
a, 7a, the feeding of the outer chain 3 that is transporting this tatami bed A is stopped and the tacking stitches are performed, and during this time the next tatami bed C is fed onto the roller 1a behind the tatami bed A. At the same time, the first inner connecting rod 9 and the second inner connecting rod 10, which have been rotated downward, are returned to the supply side end (lower end in Figure 2) by the rapid movement of the inner chain 2, and are moved above the supply side sprocket. Then, the rear push rod 13 of the first inner connecting rod 9 engages with the rear end of the tatami floor C and pushes the tatami floor C forward.

When the front end of the tatami floor C reaches the second outer connecting rod 12 that is stopped forward, the needle of the front presser 12a pierces the front end of the tatami floor C, and the outer chain 3 that has been stopped and the Both of the rotating inner chains 2 start rotating intermittently, and after the front end of the tatami floor C reaches the sewing machine needles 6a, 7a, sewing starts. At this time, the rear end of the tatami floor A and the front end of the tatami floor C are separated by the above-mentioned distance L, so
Even if there is a large difference in the widths of the tatami floors A and C, which is greater than the bosom depth of the sliding sewing machine 7, the sewing machine 7 can advance and retreat in the width direction without any trouble and can smoothly start sewing the tatami floor C. In the above embodiment, two sets of the inner connecting rods 9, 10 and the outer connecting rods 11, 12 are provided at equal intervals in front and rear, and one set of the inner connecting rods or the outer connecting rods is at the delivery side end. The other set of inner connecting rods or outer connecting rods may be located at the feed end when the second set is reached.

Furthermore, instead of the rollers 1a, a long rail or table may be provided in the direction of transport of the tatami floor A to serve as a guide support for the tatami floor. In addition, when the sewing machines 6 and 7 are used for stile stitching, the gap between the left and right sides is widened so that the tatami bed A is fed in the width direction, and both the left and right sewing machines 6 and 7 slide left and right. As explained above, in this invention, the distance between the front and rear pairs of inner connecting rods and outer connecting rods is made wider than the distance between the needle of the sliding sewing machine and the exit of the tatami floor.
Even when the dimensions of the tatami floor are significantly changed, the sliding sewing machine can follow the same without any trouble.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of a conventional tatami sewing machine, Fig. 2 is a plan view of an embodiment of the present invention, Fig. 3 is a plan view of the inner connecting rod, and Fig. 4 is Fig. 3. Figure 5 is a cross-sectional view taken along the line ■-■.
A sectional view taken along the line ■■■ in the figure.

Claims (1)

[Scope of Claims] 1. In a tatami sewing machine that moves the tatami floor straight in the width direction or length direction and performs stile stitching, flat stitching, or reverse stitching simultaneously on the left and right sides using sewing machines on both the left and right sides in the transport direction, Two rows of endless chains are arranged in parallel on each side of the guide support stand for the tatami bed installed along the transport direction of the tatami bed, and one pair is located inside of the total of four rows of endless chains. The inner chain and the pair of outer chains located on the outside are each equipped with a rear push rod that contacts the rear surface of the front tatami floor, and a front presser that contacts the front surface of the following tatami floor and has a needle facing backwards, with the distance between the two being above Install it so that it is slightly wider than the distance between the sewing machine needle and the tatami floor exit.
The above inner chain and outer chain are individually driven in one direction, and between the front presser of the inner chain and the rear push rod of the outer chain, and between the front presser of the outer chain and the rear push rod of the inner chain, respectively. A tatami bed transfer device for a tatami sewing machine, characterized in that the tatami bed is pinched and transferred. 2. The tatami floor transfer device for a tatami sewing machine according to claim 1, wherein each of the inner chain and the outer chain is provided with two sets of front pressers and rear press bars.