JPS5927593B2 - Checkered pattern sewing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for sewing a straight lattice pattern, a zigzag wavy line, a scarf stitch, or a lattice pattern on a futon, a futon fabric, a bed cover, or other humanoid sewing objects.

Conventional machines for sewing lattice patterns such as futons have a dolly placed below one sewing machine that can be moved forward, backward, left and right, the workpiece is stretched over the top of the dolly, and the dolly is used to sew a lattice pattern. It was designed to be driven according to the pattern of a tracing board on which guide strips were formed.

Therefore, (I) since the sewing is done with one sewing machine, the carriage has to move more than the entire sewing length of the lattice pattern, and the sewing time is long.

(I) 90-degree change in sewing direction for transition from vertical to horizontal rows of a grid pattern or vice versa, stop of sewing machine operation at 180-degree change point for transition to a different grid row, and trolley Since it is necessary to change the direction many times in sewing one checkered pattern, it takes more time and requires a special conversion operation device.

(G) During sewing, the sewing material shrinks or deforms due to sewing, so that the sewing start and end points of the vertical (horizontal) rows of the lattice pattern do not coincide with the most horizontal (vertical) row of the lattice pattern; This has the disadvantage that it creates an inaccurate grid pattern and reduces the product value.

I had to be especially careful when sewing futons.

SUMMARY OF THE INVENTION The present invention aims to eliminate these drawbacks, dramatically shorten the sewing time, and provide a checkered pattern sewing device that can sew accurate checkered patterns.

In the present invention, a plurality of sewing machines are arranged in a plane in a T-shape, and a center sewing machine 1 is located at the intersection of the left and right rows and front and rear rows, and a right row sewing machine group 2 is composed of two or more sewing machines excluding the central sewing machine. The left row sewing machine group 3 consisting of two or more sewing machines and the front and rear row sewing machine group 4 consisting of two or more sewing machines excluding the center sewing machine can be operated independently from each other, and the sewing machine arrangement interval of the right row sewing machine group 2 is also reduced. This relates to a lattice pattern sewing device in which the spacing between the sewing machines of the left-row sewing machine group 3 is different from that of the left-row sewing machine group 3, and a trolley 5 that is movable back and forth and left and right and that stretches objects to be sewn, such as a futon, at a position below the same sewing machine. be.

The lattice spacing of the lattice pattern is determined by adjusting the spacing of the sewing machine.

Furthermore, the mechanism for moving the carts 5 in the front, back, left, and right directions is not limited to the chain drive structure of the present embodiment, and the structure of the upper and lower carts. They may be operated in conjunction with each other, or they may be operated simultaneously by manually opening and closing each sewing machine.

Furthermore, by using these sewing machines as single-needle zigzag stitch machines for sewing futons, various patterns such as wave, trapezoid, triangle, and cycloid (scara stitch) patterns can be easily created simply by converting the machine cam.

In the figure, 6 is the left and right sewing machine mounting frames, 7 is the front and rear sewing machine mounting frames, 8 is the drive shaft of the central sewing machine 1, 9 is the interlocking drive shaft of the right row sewing machine group 2, 10 is the interlocking drive shaft of the left row sewing machine group 3, Reference numeral 11 refers to the interlocking drive shaft of the front and rear sewing machine groups 4, reference numeral 12 refers to the middle horizontal frames 13 and 14 on which the lower shaft of the sewing machine is arranged, numbers 15 to 23 relate to the structure of the cart, and 15 refers to the sewing material rack on the upper part of the same cart. frame, 16 is a lower truck that moves left and right, 17 is an upper truck that moves back and forth,
18.18' is the rail, 19.19' is the wheel, 20.2
0 A chain drive device that drives the Takeshita truck 16 and the upper truck 17 left and right and front and rear is fixed at one end to the truck frame side, and the chain wheels on both sides are fixed to the floor or the lower truck side, which is the other party to move relative to each other. It is rotated by one motor 21, 21', 22 is a guide rail, 23 is a guide roller, A right figure, a is a sewing thread.

An example of operation according to the present invention will be explained.

First, the trolley 5 is placed at the frontmost position on the left side, and an article to be sewn, such as a futon, is stretched and prepared on the article-stretching frame.

After the preparations are completed, the center sewing machine 1 and the left row sewing machine group 3 (all or part of the sewing machines) are operated, and at the same time, the trolley 5 is moved rearward.

Through this process, a total of n + 1 sewing series (vertical rows) in the front and back direction, consisting of the central sewing machine 1 and the number n of operated left row sewing machine groups 3, are simultaneously sewn on the workpiece.

When the sewing start point of the column reaches the needle position (front and rear position) of one sewing machine (mth sewing machine) in the predetermined front and rear row sewing machine group 3, the trolley 5, the center sewing machine 1, and the left row sewing machine group 3 are stopped.

Thereafter, the trolley 5 is moved to the right, and at the same time, the center sewing machine 1 and the m-th front and rear row sewing machines 4 are operated.

Then, when the 10 stitches of the central sewing machine reach the leftmost column position, the cart 5, the central sewing machine 1, and the front and rear row sewing machines 3 are stopped.

Through this process, the front and rear row sewing machines 4 and the central sewing machine 1 sew m+1 left and right sewing series (horizontal rows) on the workpiece.Moreover, the sewing starting point of the vertical row is on the horizontal row of the m-th front and rear row sewing machine 4. overlap to form part of a lattice pattern.

Also, the row sewing threads do not extend beyond the leftmost column, and the leftmost column forms part of the grid pattern.

In this way, the grid pattern can be sewn accurately and quickly by moving the carriage 5 in one direction only (see FIG. 5).

The sewing order can also be reversed to the above.

Next, when sewing a lattice pattern with different dimensions and standards, use the horizontal right row sewing machine group 2, the center sewing machine 1 and the front and rear row sewing machine group 4 shown in FIG.

The sewing machines in the right row sewing machine group 2 are set at predetermined intervals without changing the sewing machine arrangement intervals by moving the sewing machines in the sewing machine group by making the arrangement intervals of the right row sewing machine group 2 different from the arrangement intervals of the left row sewing machine group 3. The sewing machine group 2 can be used to immediately sew lattice patterns of different sizes and specifications by reversing the left and right operations in the order of operations shown in FIG.

(Refer to Fig. 6) As described above, according to the present invention, sewing machines including a central sewing machine 1, left and right row sewing machine groups 2 and 3 consisting of two or more machines, and front and rear row sewing machine groups 4 consisting of two or more machines are provided. They are arranged in a T-shape and can be driven independently of each other.
In addition, the right-row sewing machine group 2 and the left-row sewing machine group 3 are arranged at different intervals, and are equipped with a trolley 5 for tensioning the workpiece, which can be moved forward, backward, leftward, and rightward. The sewing machine can sew a checkered pattern in an extremely short time, about 1/10 or less compared to the conventional tracing method using a single sewing machine.Moreover, since the vertical and horizontal rows of the checkered pattern are sewn at the same time, the sewing condition is uniform. It is possible to obtain an accurate checkered pattern, and furthermore, it is possible to easily sew checkered patterns of two different size standards, and it is possible to obtain the effects of being extremely practical.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the overall arrangement of the lattice pattern sewing device of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a front view of the same with the drive mechanism omitted, Fig. 4 is a side view showing the cart, 5 and 6 are explanatory diagrams showing the process of sewing a checkered pattern, and FIG. 7A is an explanatory diagram showing an example of the checkered pattern. In the figure, 1: central sewing machine, 2: right row sewing machine group, 3: left row sewing machine group, 4: front and rear row sewing machine group, 5: trolley.

Claims (1)

[Claims] 1 Multiple sewing machines are arranged in a T-shape on a plane,
A central sewing machine 1 located at the intersection of the left and right rows and the front and rear rows, a right row sewing machine group 2 consisting of two or more sewing machines excluding the central sewing machine, a left row sewing machine group 3 consisting of two or more sewing machines, and the central sewing machine The front and rear row sewing machine groups 4 consisting of two or more sewing machines except for This lattice pattern sewing device is provided with a cart 5 which is movable back and forth and left and right and which stretches an article to be sewn such as a futon at a position below the sewing machine.