JPS6053564B2 - Straw removal sewing machine as waste straw processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waste straw sewing machine as a waste straw processing device for sewing not a continuous material such as cloth or paper, but an intermittent material such as waste straw. be.

An object of the present invention is to reduce contact resistance with the object to be sewn when the sewing needle moves up and down when sewing an object to be sewn, such as waste straw, so that the sewing needle can operate reliably.

The present invention makes it possible to force-feed the workpiece by protruding the scraping tool into the sewing passageway to form a space in the sewing passageway where no workpiece exists, and when the sewing needle enters the sewing passageway, A straw disposal station configured to move a space formed by a raking tool.

The present invention provides a straw removal sewing machine as a waste management device. Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

An input shaft 2, a rake shaft 3, a ratchet shaft 4, and a needle shaft 5 are rotatably supported in a sewing machine case 1, and the input shaft 2 and the rake shaft 3 are gear-transmitted via a small gear 6 and a large gear 7. .

The ratchet 8, the first cam 9, and the second cam 10 are secured with keys 11 to the ratchet shaft 4, and a cylinder 13 with the intermediate portion of the connecting lever 12 fixed is loosely fitted, and the arm 14 is made to protrude from the inner end of the cylinder 13. Attach the ratchet claw 15 to the tip of the arm 14.
The ratchet 8 is configured to walk only in the middle by vertically moving the connecting lever 12 (in the direction of arrow A). The base 16a of the raking tool 16 is pivotally attached to one end 12a of the connecting lever 12, and the raking tool 16 is mounted on a shaft 19 that is integrated with the tip 17b of a drive arm 17 whose base 17a of the drive arm is keyed to the raking shaft 3. Pivot the top of the.

A shutter arm 20 and a second cam arm 2 are attached to the needle shaft 5.
1 is fixed and the needle arm 23 is loosely fitted into the cylindrical body 22 which is loosely fitted on the needle shaft 5, and the cutter 24 and the first cam arm 25 are
and attach the shutter 2 to the tip of the shutter arm 20.
6 is fixed, and the needle 27 is fixed to the needle arm 23.

A roller 25a mounted on the tip of the first cam arm 25 is brought into contact with the cam surface 9a of the first cam 9, and the second cam arm 25a is brought into contact with the cam surface 9a of the first cam 9.
A roller 21a mounted on a shaft at the tip of the second cam 10 is brought into contact with the force surface 10a of the second cam 10. End portion 12b of connecting lever 12
The tip of a connecting rod 29 pivotally connected to the needle arm 2 via a shaft 28
3 via a shaft 30, and the needle arm 23 is configured to be pivoted up and down via the connecting lever 12 and the connecting rod 29 when the scraping tool 16 swings.

The top surface 1a of the sewing machine case 1 and the upper surface of the receiving plate 31 fixed to the case 1 are used as support surfaces for the material to be sewn (waste straw) M, and a guide rod 32 is installed at a distance above the top surface 1a and the receiving plate 31. A sewing path R is formed between the top portion 1a1 receiving plate 31 and the guide rod 32.

A base part of a roller arm 33 is mounted on an extended head part 1b of a sewing machine case 1, and a tip part 33a is rotatable in the vertical direction, and a presser roller 34 is mounted on the tip part. 35 and 36 are springs that tension and bias the roller 21a and the roller 25a substantially in the radial direction.

When the threshed waste straw M is transferred into the sewing path R (forcibly transferred by a transfer chain, falling naturally due to its own weight),
The straw M is moved to its tip 16 by rotation of the drive arm 17.
b is constantly compressed and scraped by the scraping tool 16, which is constantly swinging along a horizontally long elliptical trajectory S, and is transferred within the sewing path R to the presser roller side.

The waste straw M compressed and raked by the raking tool 16 is removed by the raking tool 1.
The stitches are continuously sewn between the needle 27 and the thread take-up tool 18 by the needle 27, which moves upward while penetrating through the back of the scraping tool 16 within the width of 6.

The timing between the position of the tip 16b of the scraping tool 16 and the position of the tip of the needle 27 is shown in FIGS. 4 and 5, and Pl, P2, . . . , which correspond to the positions Ql and Q2 of the tip 27a of the needle 27, respectively. The sewing operation using the needle 27 and the scraping tool 16 will be described in detail with reference to FIGS. 6 to 13.

The needle 27 through which the thread T has been passed moves from the upper position in Figure 6 to the intermediate position in Figure 7 to the lower position in Figure 8, and the front end surface of the straw M that was received on the back surface of the needle 27 is moved from the upper position in Figure 6 to the lower position in Figure 8. Catch it with thread T. On the other hand, the tip 16b of the raking tool 16 gradually protrudes into the straw removal path R while retreating, and then advances to press the rear end surface of the straw removal M with the front surface of the raking tool 16 (see FIG. 8). Scraping tool 16
By advancing the tip 16b from the position shown in FIG. 8 to the position shown in FIG. 9, the straw M between the thread T and the scraping tool 16 is compressed and forced forward. The needle 27 rises from the state shown in Fig. 9, removes the thread T1 threaded through the needle 27 from the needle hole and drops it (Fig. 10), threads the thread T2 anew, and then descends (Fig. 11). ).

At this time, the scraping tool 16 is in the lower position, and the following straw M is received by the back surface of the needle 27. As the needle 27 further descends from the position shown in FIG. 11 to the position shown in FIG. 12, the new thread T2 passes through the loop of the thread T1 wound around the needle 27, and the waste straw M is sewn. Next, the needle 27 moves to a rising process, resulting in the state shown in FIG. 13, which is similar to that shown in FIG. 9.

Thereafter, the operations shown in FIGS. 10 to 13 are repeated to continuously sew the straw M. Furthermore, this seam type is JISB9O7O.
This is a single-needle, single-thread single chainstitch defined as CLL in . Therefore, with reference to FIGS. 9 and 13,
When the needle 27 enters the passage R, the needle 27 rises in the space immediately behind the waste straw M that has been force-fed by the scraper 16, and does not directly enter into the waste straw M. In addition, the presser roller 34 presses the waste straw M in the opposite direction by a spring, but this is an elastic force that opens a passage when the waste straw M passes through, and the waste straw M continues to be sewn. When it is forced and fed by the raking tool 16, it rotates to the upper position and allows the sewn waste straw M to freely pass through.

As mentioned above, the needle 27 always moves up and down in accordance with the rotation of the raking tool 16, and the sewing operation is always performed. If the number of ratchet threads is set to 50, the ratchet 8 is rotated by the number of rotations.

Therefore, the first cam 9 and the second cam fixed to the ratchet 8
Cam 10 also rotates. The first cam 9 and the second cam 10 have different phases (the difference in phase is equal to five ratchet pawls and corresponds to five blank stitches, which will be described later), and a groove V for driving the shutter. Groove W force surface 10 for driving the cutter
a, 9a, and as the cams 9, 10 rotate, the roller 21a first falls into the groove V, and the shutter 20 operates in the direction of the arrow to block the passage R.
The waste straw M is prevented from being sent into the sewing path R, and the scraping tool 16 is then operated five times, that is, five times of empty stitching [these five times are due to the phase difference between the respective cam grooves V and W. After the operation, the roller 25 is inserted into the groove W.
A falls down, rotates the cutter 24 in the direction of arrow C, and cuts the yarn between it and the roller 25a above the path R.

In the present invention, as described above, when the sewing needle enters the straw removal passage, the scraping device is positioned on the side, so that the sewing needle enters and rises in the space where no straw exists, thereby preventing the needle from being worn out. At the same time, the needle can be made stronger by using a thicker needle, and the possibility of mis-threading can be reduced, making it possible to use the sewing machine more reliably.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the main parts of a sewing machine for removing straw, etc., which embodies the present invention. Figure 2 is also a developed sectional view. FIG. 3 is a perspective view showing the main parts. FIG. 4 is an explanatory diagram showing the movement of the scraping tool, needle, etc. FIG. 5 is an explanatory diagram showing the locus of movement of the scraping tool and the needle. 6 to 13 are explanatory diagrams showing the sewing machine, in which figure a is a side view and figure b is a side view. 3... Scraping shaft, 12
...Connection lever, 16...Rake tool, 1
7... Drive arm, 27... Needle, M...
... Straw removal, R ... Sewing passage, S ...
- Motion trajectory of the tip of the scraping tool, T...thread.

Claims (1)

[Claims] 1. Straw removal as a waste straw processing device having a scraping device that protrudes into a sewing path and force-feeds a workpiece to be sewn, a sewing needle that projects into the sewing path and operates, and a thread taker that performs sewing between the sewing needle. Straw removal processing in a sewing machine, characterized in that a sewing needle 27 is provided that moves inward while being located within the width of the raking tool 16 in a side view with the raking tool 16 protruding into the sewing path R. Straw removal sewing machine as a device.