JPS5847199B2 - double head sewing machine - Google Patents

Description

[Detailed Description of the Invention] In recent years, as clothing is often made using stretchable fabrics, even when sewing various parts to make a single clothing item, it is necessary to sew each part separately. Appropriate stitching methods, such as lockstitch and lockstitch, are required.

In such cases, some companies are currently installing two sewing machines, each with its own sewing function, but having two sewing machines takes up a lot of space and costs a lot of money. There is a problem that requires it.

These problems are particularly serious problems for general household use, and it is desired that a sewing machine that can solve these problems be developed.

Therefore, the present invention is intended to meet the above-mentioned demands, and is capable of sewing in two different ways even with one sewing machine, and furthermore, allows these sewing methods to be performed with high safety, and is inexpensive. The object of the present invention is to provide a double-headed sewing machine that is capable of performing the following functions.

Now, the illustrated example will be described.

Reference numeral 1 is a known T-size lockstitch sewing machine, and reference numeral 2 is a lockstitch sewing machine in which the driving main shaft is placed horizontally on the upper part of the machine frame, and the needle bar 21 equipped with a needle 22 and a knife 23 is moved up and down.
The looper 28, cloth feeder (not shown), etc. are operated in synchronization with the movement of the needle 22 by interlocking with the movement of eccentric wheels 25, 26, and 27 provided in the needle 22.

Reference numeral 24 denotes a lower cloth cutting knife, which is positioned so as to be in constant sliding contact with an extension piece 23' of the vertically movable knife 23 provided on a part of the needle bar.

Next, as shown in FIG. 2, the main shaft 3 of the lockstitch sewing machine 1 extends outside the machine frame, and its end faces the end of the main shaft 6 of the lock sewing machine 2.

These main shafts 3.6 are also connected to a switching mechanism.

Next, the switching mechanism will be explained.

The numbers 5.5', 4', and 4 are all cast metal, and the main shafts 3 and 6 are
As shown in Figure 3, the main shaft 3 of the lockstitch sewing machine
The pins 12, 12' of the pulley 7, which are loosely fitted into the slots 4' and 12', are adapted to engage the grooves 4' and 5' of the cast metal.

Therefore, if the pulley is moved to the right, the pin 12' will be moved to the cast metal 4.
The sewing machine 1 is operated by the rotation of the pulley which is engaged with the kerf 4 of the sewing machine 1.

When this pulley is moved to the left side, the pin 12 engages with the cast metal cut #5' to rotate the main shaft 6 of the lock sewing machine 2.

A belt 9 is stretched around the outer periphery of the pulley 7, and the pulley 7 is rotated at a reduced speed by the drive of a small pulley 11 of a motor 10.

Further, the motor 10 is held on a sliding table 14 and can be moved in the direction of arrow 20 and 19 by the operation of the bundle 13 using a rack, gear mechanism, etc., so that the pulley can be smoothly moved from side to side via the belt 9. It can be done.

Therefore, the main shafts of the two sewing machines can be selectively driven as desired by moving the pulley as the motor moves.

Next, let's talk about the turntable.

Since a shaft 15 is provided approximately in the center of one rotary table 1T on which two sewing machines are mounted and is combined with a base plate 16, this shaft 15
Sewing machines 1 and 2 move toward arrow 1 as shown in Fig. 4 with
Since the sewing machine rotates in eight directions to change its orientation, it is placed in the position where a lockstitch sewing machine is used, as shown in FIG.

(Figure 1 shows the orientation of a double-headed sewing machine when using a lock sewing machine.

) Note that this double-head sewing machine is not limited to selecting both sewing machines by turning the rotary base 17 in this way; the user can also move the double-head sewing machine to a position facing the lockstitch sewing machine or lockstitch sewing machine, or move the double-head sewing machine to the base plate. It goes without saying that you can select both sewing machines by changing the direction of the sewing machine.

As mentioned above, this sewing machine has two sewing machines arranged so that the main shaft end 6 of the lock sewing machine 1, which is designed with the upper shaft at the top and the width within 10 crfL, and the main shaft 3 of the lockstitch sewing machine are in a line. The main spindle of the two sewing machines can be latched by moving the pulley as the tension course of the transmission belt changes as the single motor moves left and right. This double-headed sewing machine is characterized in that the sewing machine performs the sewing operations in a switching manner, and selects the sewing machine for the purpose of sewing and places it facing forward.

As described above, this invention is equipped with two types of sewing machines each having different sewing functions, so when sewing is performed using these machines, two types of sewing can be performed with one machine. There are features that can be used.

Furthermore, by setting this sewing machine at the desired sewing work position, it is possible to use a spacious bed surface for handling cloth commensurate with each sewing work, and it can be used just like a normal single sewing machine. Sewing work can be done using the sewing machine.

This prevents accidents such as the fabric being unknowingly caught in the other sewing machine when the fabric is being fed one after another while paying close attention only to sewing, and sewing safely. This has the effect of advancing the work.

Furthermore, as mentioned above, since the two sewing machines are selectively moved, the drive source only needs the power to move one of them, and a small drive source can be used, making it inexpensive. There is also the advantage that it can be provided.

Furthermore, in the present invention, when both the sewing machines 1 and 2 are provided on the rotary table 17 which can rotate with respect to the base plate 16,
This produces the effect that two types of sewing machines having different sewing functions can be easily selected and used simply by rotating the rotary table 17, that is, without getting up from the seat.

[Brief explanation of the drawing]

Figure 1 is a front view of a lockstitch sewing machine and a lockstitch sewing machine, with their main shafts aligned and combined and driven by a single motor. Figure 2 is a diagram showing an example of the drive pulley and clutch mechanism. The figure is a plan view of the clutch plate, FIG. 4 is a top view showing the state in which the double-headed sewing machine is rotated to change direction, and FIG. 5 is a front view when the lockstitch sewing machine is placed in front.

Claims (1)

[Claims] 1. A sewing machine with one sewing function and a sewing machine with a sewing function different from the above-mentioned sewing machine are arranged on the machine base, and the main shafts for driving each of the above-mentioned sewing machines are connected to a switching mechanism. In addition, in the sewing machine, a drive source is connected to the switching mechanism, and the switching mechanism is configured to selectively transmit the driving force from the drive source to the drive shafts of the two sewing machines, A turntable is rotatably pivoted to the base plate,
On the rotating table, one sewing machine with a sewing function and the other sewing machine with a sewing function different from the above-mentioned sewing machine are installed, with both sewing machine arms arranged so that the main axis of each sewing machine is in the horizontal-linear direction. The vertical frame portions of the sewing machines are placed close together and facing each other back to back, and the needle bars of each sewing machine are arranged so as to face outward in the left and right lateral directions, and the main shafts for driving each of the sewing machines are connected to a switching mechanism. and a drive source is connected to the switching mechanism, and the switching mechanism is configured to selectively transmit driving force from the drive source to the drive shafts of both sewing machines. Double head sewing machine.