JPS6048192B2 - 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, the tatami floor! )) After sewing both ends of the tatami face to the gussets, the tatami bed with the tatami face attached as shown above is used as a flat stitching machine to sew the hem cloth and the underside of the edging to the upper ends of both sides of the tatami face. It is known that a sewing machine is fixed on a tatami bed and the sewing machine runs along the side edge of the tatami bed (see Japanese Utility Model Publication No. 51-28807).
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However, in the above-mentioned known flat stitching machine, the tatami bed is fixed to the tatami stand and the sewing machine runs, and the sewing machine is installed only on one side of the tatami stand, so it is difficult to flat stitch one tatami. In order to do this, it is necessary to make two reciprocations of the sewing machine and to attach and remove the tatami mats each time the sewing machine makes two reciprocations, resulting in the disadvantage that a large number of tatami mats cannot be processed continuously. In order to eliminate the above-mentioned drawbacks, the applicant has previously proposed a method in which two sewing machines are placed facing each other, and a tatami floor is provided between the two sewing machines so that flat stitching can be performed simultaneously on the left and right sides. He invented a tatami sewing machine, and as a tatami bed transfer device that can be used with this tatami sewing machine, he installed endless chains on both left and right sides of the tatami bed guide transfer table, and attached the above-mentioned guide support to this endless chain. A method was proposed in which a straddling connecting rod was fixed and the tatami floor was pushed and transferred using this connecting rod (see the specification of Japanese Patent Application No. 73889/1989). However, since this tatami bed transfer device pushes the tatami bed by engaging the tatami pushing rod with the stile at the rear end of the tatami bed, the front end of the tatami bed swings from side to side, causing the sewing machine needle to break. I had something to do. This invention prevents the front end of the tatami bed from swinging by installing a plurality of needles facing backward on the rear surface of the connecting rod and piercing the front end of the following tatami bed. .

That is, the present invention provides a tatami sewing machine which simultaneously performs stile stitching, flat stitching, or backstitching on the left and right sides of the tatami floor using sewing machines on both left and right sides in the transport direction while moving the tatami floor straight in the width direction or length direction. A guide support for the tatami floor is provided along the direction of floor transfer, and two parallel rows of endless chains are provided on each of the left and right sides of the guide support. An inner connecting rod and an outer connecting rod each having a plurality of needles projecting backward from the rear surface of the guide support base are fixed to the inner chain and a pair of outer chains located outside, respectively. The outer chains are individually driven in one direction, and the inner connecting rod or the outer connecting rod is engaged with the rear end of the tatami floor, and the outer connecting rod or the inner connecting rod is positioned in front of the front end of the tatami floor. There is a tatami bed transfer device for a tatami sewing machine, characterized in that the tatami bed is transferred by piercing the tatami bed with a needle.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 10.

In Figures 1 and 2, A is a tatami bed with a tatami cover (not shown) attached and stitched with stilts and flat stitches, and is rotatable to guide the tatami bed A in the length direction. A large number of guide rollers 1 supported by the guide rollers 1 are arranged in the direction of the arrow P.

On both the left and right sides of this row of rollers 1, approximately 1.
Endless chains 2 and 3 for transmission are connected over 5 times the length of the
A pair of outer chains are arranged in a straight line row by row, with the upper straight part (see FIG. 2) being located slightly below the upper surface of the roller 1, and are located on the outer side of the four rows. 2 and a pair of inner chains 3 located inside are rotated independently of each other in the same direction of arrow Q. In other words, the drive side (first
The sprockets 4a, 4a on the right side of the figure and the sprockets 5a, 5a on the driven side are respectively attached to the outer sprocket shaft 4.
and drive-side sprockets 6a, 6a fixed to both ends of the chain 5 and meshing with a pair of inner chains 3, 3.
and driven side sprockets 7a and 7a are fixed to both ends of hollow inner sprocket shafts 6 and 7 rotatably fitted to the outer sprocket shafts 4 and 5, respectively,
The outer sprocket shaft 4 and the inner sprocket shaft 6 are adapted to rotate intermittently or continuously by transmission from the feed conversion mechanism 8, respectively. The above-mentioned feed conversion mechanism 8 is constructed as shown in FIG.

That is, an intermittent rotation shaft 10 is connected to the shaft end of the drive-side outer sprocket shaft 4 via a first electromagnetic clutch 9. A ratchet wheel 11 and a first intermediate sprocket 12 are fixed to the intermittent rotation shaft 10, respectively. A feed pawl 13 is engaged with the ratchet wheel 11, and a feed lever 14 to which this feed pawl 13 is attached is connected to the motor 1 of a fixed sewing machine 15 for reverse stitching installed on the left side.
6, the motor sprocket 16a, endless chain 17, intermittent drive sprocket 18, camshaft 19,
It is swung via the cam 20, a swiveling lever (not shown), and the like. Further, the first intermediate sprocket 12 is
It is connected by an endless chain 21 to a second intermediate sprocket 22 having the same number of teeth. This second intermediate sprocket 22
The intermediate shaft 23 to which the intermittent rotating shaft 10 is fixed is supported in parallel with the intermittent rotating shaft 10, and one end of the continuous rotating shaft 25 is connected to the shaft end via the second electromagnetic clutch 24. One end of an inner drive shaft 27 is connected to the end via a third electromagnetic clutch 26 . A continuous drive sprocket 28 is fixed to the continuous rotation shaft 25, and the rotation of the right continuous feed motor 29 is transmitted to this continuous drive sprocket 28 via a motor sprocket 29a and an endless chain 30. be done. Further, a third intermediate sprocket 31 is fixed to the inner drive shaft 27,
This third intermediate sprocket 31 is connected via an endless chain 32 to a fourth intermediate sprocket 6b having the same number of teeth. The fourth intermediate sprocket 6b is integrated with the sprocket 6a fixed to the inner sprocket shaft 6. In FIG. 4 and FIG. 5, the pair of outer chains 2 and 2 have respective inner chains 3 and 3.
, 3, L-shaped fittings 2a, 2a are fixed to the side opposite to 3,
Both ends of an outer connecting rod 33 in the width direction that straddles the roller 1 are fixed to the upper ends of the columnar metal fittings 2b, 2b erected on the left and right L-shaped metal fittings 2a, 2a.

A needle 33b pointing backward is provided on the rear surface (lower side in FIG. 4) of this outer connecting rod 33 via a plurality of rear protrusions 33a, projecting at approximately the same height as the stile of the tatami floor A on the roller 1. At the center, a central protrusion 34a of a tatami pushing rod 34 that engages with the rear end of the tatami floor A located in front of the tatami pusher rod 34 is swingably mounted on a vertical support shaft 35. Upper surface protrusions 33c, 33c protruding from the left and right sides of the upper surface and tatami push rods 34
Coil springs 36, 36 are compressed between the left and right end portions. An end surface protrusion 33d is protrudingly provided on the left end surface of the outer connecting rod 33, and as the outer chain 2 rotates, the lower straight portion of the left outer chain 2 (FIGS. 1 and 2) The clutches contact the limit switches 37a, 37b provided along the (see), and sequentially open and close these to operate the electromagnetic clutches 9, 24, 26. In addition, 38 is the outer chain 2
and a chain guide for preventing slack and vibration of the inner chain 3. On the other hand, as shown in FIG. 6, the pair of inner chains 3, 3 have outer chains 2, 2
L-shaped metal fittings 3a, 3a are fixed to the opposite sides, and columnar metal fittings 3c, 3b are erected from these L-shaped metal fittings 3a, 3a.
Both ends of an inner connecting rod 39 are fixed to the upper end of the inner connecting rod 39. In addition, back protrusion 39a1 needle 39b1 top protrusion 39c1 tatami push rod 4
0, central protrusion 40a1 support shaft 41, coil spring 42
are provided in the same way as for the outer chain 2. The inner connecting rod 39 is provided with an end surface protrusion 39d protruding from the right end surface opposite to that of the outer connecting rod 33.
9d comes into contact with limit switches 43a and 43b provided along the lower straight part of the right inner chain 3 (see FIGS. 1 and 2) as the inner chain 3 rotates, and these switches are sequentially activated. The electromagnetic clutches 9 and 2 are opened and closed.
4 and 26. 1 and 2, a sliding sewing machine 44 is provided so as to be slidable in the width direction along rails 45, 45 with respect to the fixed sewing machine 15.

As shown in FIG. 7, a nut 44a is fixed to the lower part of the sliding sewing machine 44, and a feed screw 45b rotated by a sliding motor 45a is screwed into this nut 44a. Further, the sliding sewing machine 44 is provided with an L-shaped lever 46 that can freely swing horizontally, and a roller 46a attached to one end of the L-shaped lever 46 is pressed against the side surface of the tatami floor A by the elasticity of a spring 47. When the L-shaped lever 46 is rotated clockwise due to the unevenness of the side surface, the iron piece 46b fixed to the other end faces the left proximity switch 48a, and this proximity switch 48a is activated to move the sliding motor 45. is rotated in the normal direction, thereby sending the sliding sewing machine 44 in the direction of arrow R, and conversely, when the L-shaped lever 46 is rotated counterclockwise, the iron piece 46b moves to the right proximity switch 48b.
The sliding motor 45a is reversed so that the sliding sewing machine 44 is sent in the opposite direction of the arrow R.
It's getting old. In addition, in Figures 1 and 2, 4
Reference numeral 9 denotes a press roller that is provided to press the upper surface of the sewn portion of the tatami floor A and is movable up and down.

Further, 50 is a fixed tatami bed guide fixed to the side surface of the tatami bed A in order to regulate the widthwise position of the tatami bed A, and 51 is a fixed tatami bed guide attached to the side of the sliding sewing machine 44. The sliding tatami floor guide 51 is slidably provided opposite to the tatami mat floor guide 50, and the sliding tatami floor guide 51 is slid in the width direction of the tatami floor A by a fluid cylinder 52, When the tatami floor A is supplied to the fixed tatami floor guide 50, the tatami floor A is pressed onto the fixed tatami floor guide 50 and then immediately retreated to the illustrated position. In the above structure, FIGS. 1 and 2
As shown in the figure, the tatami pushing rod 34 of the outer connecting rod 33 engages with the rear end of the tatami floor A, and the needle 39b (see FIG. 6) of the inner connecting rod 39 pierces the front end of the tatami floor A. When the tatami pushing rod 40 of the inner connecting rod 39 is engaged with the rear end of the preceding tatami bed B, the sewing machine motor 16 shown in FIG. 3 is driven, and the first electromagnetic clutch 9 and the second Both the electromagnetic clutch 24 and the third electromagnetic clutch 26 are activated, and both the outer sprocket shaft 4 and the inner sprocket shaft 6 are driven, and the tatami floor A, in synchronization with the movement of the needles of the sewing machines 15, 44, is activated.
Tatami floor A where B is intermittently fed and passes through sewing machines 15 and 44
A backstitch is applied to the If the width of the tatami bed A fluctuates due to the straightening of the side surface of the tatami bed A on the sliding sewing machine 44 side, the sliding sewing machine 44 slides in the width direction according to the amount of variation. The above-mentioned backstitching is performed. At this time, the needle 3 of the front inner connecting rod 39 is attached to the front end of the tatami floor A.
Since the 9b is stuck in, the front end of the tatami bed A is prevented from swinging, so the sewing machine needle is not broken, and the sewing line is formed parallel to the side edge of the tatami bed A without distortion. When the tatami floors A and B move forward and reach the drive side end of the C side connecting rod 39, this inner connecting rod 39 rotates downward by the sprocket 6a, and as a result, the needle on the rear surface of the inner connecting rod 39 rotates downward. After the needle 39b is pulled out from the front end of the tatami floor A, the subsequent tatami floor A is sewn with the needle 39b removed from the front end.
Ru. However, at this time, since the latter half of the tatami floor A is being sewn, the amount of movement of the sewn part is very small, so there is no risk of the sewing machine needle breaking or the sewing line being bent. rare. Next, as shown in FIG. 8, when the rear end of the tatami floor A being transferred by the outer chain 2 by ζ reaches the sewing machine needle (not shown), the first electromagnetic clutch 9
connection is broken, intermittent feeding of the outer chain 2 is stopped, and tacking is performed.

On the other hand, the inner connecting rod 39 rotates downward, and the end surface protrusion 39b protruding from the right end surface contacts the limit switch 43a, which causes the continuous feed motor 29 (see FIG. 3)
is driven, the inner chain 3 is changed from intermittent feeding to continuous feeding, and the inner connecting rod 39 is returned to the left tatami supply side at high speed. Then, as shown in FIG. 9, when the inner connecting rod 39 reaches below the sprocket shafts 5 and 7 at the end of the tatami supply side and the end surface protrusion 39b of the inner connecting rod 39 contacts the limit switch 43b, the third electromagnetic When the clutch 26 is disconnected, the continuous feed motor 29 stops rotating, and the continuous feeding of the inner chain 3 is stopped. As described above, while the rear end of the tatami bed A is sewn (tacking stitches) and the inner chain 3 is continuously fed, the subsequent tatami bed C is fed onto the roller 1 on the tatami supply side. fluid cylinder 5
2 (see FIG. 1) is activated, the sliding tatami floor guide 51 makes one reciprocation in the width direction, the tatami floor C is pressed against the fixed tatami floor guide 50, and the tatami floor C is positioned.

Thereafter, the continuous feed motor 29 is driven again, the third electromagnetic clutch 26 is activated, continuous feeding of the inner chain 3 is started, and the inner connecting rod 39 is connected to the sprocket shaft 5.
, 7 and the tatami pushing rod 40 engages the rear end of the tatami floor C.
Then, fast forwarding of the tatami floor C is started. In addition, after the tatami floor C is supplied as described above, the lower limit switch 4
When the inner connecting rod 39 reaches 3b, the inner connecting rod 39 rotates upward without stopping and engages with the rear end of the tatami bed C via the tatami pushing rod 40. Then, as shown in FIG. 10, when the front end of the tatami floor C reaches the outer connecting rod 33 stopped forward, the needle 33b on the rear surface pierces the front end of the tatami floor C, and the continuous feeding motor 29 is activated. At the same time, the first electromagnetic clutch 9 is activated again, that is, all the electromagnetic clutches 9, 24, and 26 are activated, and the intermittent feeding of the tatami bed A by the outer chain 2 is started again, and the subsequent tatami bed C Backstitching is applied to the Note that, at the beginning of reverse stitching, the feed is temporarily stopped and tacking stitches are performed. Also, the tatami bed A is sent out to the right, and the outer connecting rod 3 is interposed between the rear end of this tatami bed A and the front end of the following tatami bed C.
3 is rotated downward to close the limit switch 37a and to start tacking the rear end of the subsequent tatami floor C, the continuous feed motor 29 is driven and at the same time the first electromagnetic clutch 9 and the second electromagnetic clutch 9 are turned downward. The clutch 24 is connected, the outer chain 2 is continuously fed, and the outer connecting rod 33 reaches the supply end and is stopped when the limit switch 37b is closed. Next, the second embodiment is shown in FIGS. 11 to 1.
This will be explained using Figure 3.

In FIG. 11, the outer chain 2 and the inner chain 3 have a length equal to or more than one tatami floor A at both the front and rear portions of the sewing machines 15 and 44, respectively.
Two sets of outer connecting rods 33 are fixed to the outer chain 2 and two sets of inner connecting rods 39 are fixed to the inner chain 3 at equal intervals.
Tatami pushing rods 34 and 40 are attached to 9 and 39, respectively.

Then, the tatami bed A sandwiched between the tatami pushing rod 34 of the outer connecting rod 33 and the inner connecting rod 39 in front of it is intermittently fed and backstitched, and when the rear end reaches the sewing machines 15, 44. , the outer connecting rod 33 stops, the inner chain 3 is converted into continuous rotation, and the inner connecting rod 39 continues to move forward, so the needle 39b of the inner connecting rod 39 is pulled out from the front end of the tatami floor A, and the inner connecting rod 39 The tatami floor B in front of it is pushed forward via the tatami pushing rod 40. At this time, since the other inner connecting rod 39 is located near the sprocket shafts 5 and 7 on the tatami bed supply side, one of the inner connecting rods 39 that is feeding the tatami bed B is separated from the tatami bed A. Shortly thereafter, the other inner connecting rod 39 reaches below the sprocket shafts 5, 7, and the end protrusion 39
d (see FIG. 6) contacts a limit switch (not shown), and the inner chain 3 is stopped (see FIG. 12). Next, when the subsequent tatami floor C is supplied, the inner chain 3 is again continuously rotated, and the other inner connecting rod 39
rotates above the sprocket shafts 5 and 7, and as shown in FIG. 13, the tatami pushing rod 40 engages with the rear end of the following tatami bed C to advance the tatami bed C. Then, the front end of the tatami floor C is the sewing machine 1.
5, 44, and when the needle 33b touches the rear surface of the stopped outer connecting rod 33 and pierces the front end of the tatami floor C, the inner chain 3 is converted to intermittent rotation, and the outer chain 2 starts intermittent rotation. Then, backstitching for the tatami floor C begins.
This second embodiment has an outer connecting rod 33 and an inner connecting rod 3.
9, and two sets of outer connecting rods 3.
3, 33 (or the inner connecting rods 39, 39) is located on the feed side when the other is located on the supply side, so the distance to rapidly feed the outer chain 2 or the inner chain 3 is changed from the first example. The operating time of the sewing machines 15, 44 is improved. In addition, until the sewing of the tatami floor A is completed, the front end of the inner connecting rod 39
Alternatively, since it is fixed by the needles 39b or 39b of the outer connecting rod 33, the swinging of the tatami floor A is further reduced. In the first and second embodiments described above, the fixed sewing machine 15
By using a flat stitch sewing machine as the sliding sewing machine 44, flat stitching can be performed.Furthermore, by using a hook stitch sewing machine as the sewing machines 15 and 44, and setting the intervals widely, the tatami floor can be made with a wide width. By moving in the direction, stile stitching can be performed.

Furthermore, instead of the rollers 1, a plurality of long sliding rails or tables may be provided in the direction of transport of the tatami floor A to serve as a guide support for the tatami floor. Further, the feed conversion mechanism 8 is
The positions of the continuous rotation shaft 25 and the intermediate shaft 23 can be exchanged, and the first intermediate sprocket 12 can be fixed between the ratchet 11 and the first electromagnetic clutch 9, or other changes can be made as appropriate, or an electromagnetic clutch can be added. Accordingly, one of the outer chain 2 and the inner chain 3 may be fed intermittently while the other is fed continuously. Furthermore, a one-way clutch may be attached to the intermittent rotating shaft 10 instead of the ratchet wheel 11. Furthermore, the tatami pushing rods 34 and 40 may be omitted and the outer connecting rod 33 and the inner connecting rod 39 may be directly engaged with the rear end of the tatami floor. A section can be provided. As explained above, the present invention is capable of "continuously feeding a large number of tatami mats between two facing sewing machines," thereby improving the operating rate of the sewing machine and increasing the number of tatami mats at the front end of the tatami mat bed. Since swinging is prevented, clean stitches can be obtained and the sewing machine needle will not break.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the first embodiment of the invention, and FIG. 2 is a plan view of the first embodiment of the invention.
3 is a plan view of the feed conversion mechanism, FIG. 4 is a plan view of the outer connecting rod, FIG. 5 is a sectional view taken along the line ■-V in FIG. 4, and FIG. 6 is a plan view of the inner connecting rod. 7 is a plan view of the sliding mechanism of the sliding sewing machine, FIGS. 8 through 10 are side views for explaining the operating sequence, and FIGS. 11 through 13 are views of the second embodiment. FIG. 3 is a side view for explaining the order of operation.

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, A guide support for the tatami floor is provided along the transport direction of the tatami floor, and endless chains are provided in parallel in two rows on each of the left and right sides of the guide support, and are located inside of a total of four rows of endless chains. An inner connecting rod and an outer connecting rod, each of which has a plurality of needles projecting backward from its rear surface, are fixed to a pair of inner chains and a pair of outer chains located on the outside, respectively, straddling the guide support base and having a plurality of needles projecting backward from the rear surface. The chain and the outer chain are individually driven in one direction, and the inner connecting rod or the outer connecting rod is engaged with the rear end of the tatami floor, and the outer connecting rod or the inner connecting rod located in front of the front end of the tatami floor A tatami bed transfer device for a tatami sewing machine, characterized in that the tatami bed is transferred by piercing a needle of a connecting rod. 2. The inner chain and the outer chain each perform intermittent rotation to transfer the tatami floor in synchronization with the movement of the sewing machine needle, and connected rotation to rapidly advance the tatami floor regardless of the movement of the sewing machine needle. A tatami bed transfer device for a tatami sewing machine according to claim 1. 3 A hollow shaft to which the left and right chain sprockets for driving the inner chain are fixed is rotatably fitted to the outer drive shaft to which the left and right chain sprockets for driving the outer chain are fixed, and a shaft is provided in parallel to this hollow shaft. A patent in which power is transmitted from an inner drive shaft to rotate in the same direction at the same speed, and a drive source for intermittent feed and a drive source for continuous feed are connected to the above-mentioned outer drive shaft and inner drive shaft via an electromagnetic clutch. A tatami bed transfer device for a tatami sewing machine according to claim 2. 4. The tatami floor transfer device for a tatami sewing machine according to any one of claims 1 to 3, wherein the inner chain and the outer chain each include a set of an inner connecting rod and an outer connecting rod. 5. The tatami floor transfer of the tatami sewing machine according to any one of claims 1 to 3, wherein the inner chain and the outer chain each include two sets of inner connecting rods and outer connecting rods at equal intervals. Device. 6. The tatami mat sewing machine according to any one of claims 1 to 5, wherein one of the left and right sewing machines is fixed to a frame and the other is slidable in the width direction. Floor transfer device.