JPS5949820B2 - Tracing track plate used in pattern sewing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine used in a device that sews a workpiece in a predetermined sewing pattern by a fixed sewing machine, in which a workpiece is stretched over a carriage that is driven vertically and horizontally according to the rail pattern of a copying rail plate. Concerning improvement of track plates.

Conventionally, when the sewing pattern has sharp bends such as right angles or acute angles,
Or, when the jig wheel has to be turned sharply during dry sewing, even if the rail is shaped according to the pattern and direction of turning (as shown in Figure 1 A), the tracing wheel cannot follow the pattern, so the The problem was solved by forming a smooth loop of a predetermined size on the track as shown in the figure, and simply running the jig without sewing the loop.

However, this solution lacks (I) continuity of the sewing thread, and requires a seam at the end and beginning of sewing;

(II) Due to lack of continuity of sewing threads, the end of sewing does not match the start of sewing, and the sewing threads cross, impairing the aesthetic appearance.

(III) Since there is no continuity of the sewing thread, the pitch of the sewing thread changes, spoiling the aesthetic appearance.

(IV) The mechanism becomes complicated and the working time becomes longer.

A problem has arisen.

) The present invention aims to provide a highly practical sewing device that solves these problems.

The gist of this invention is to drive a trolley on which a workpiece is stretched to move vertically and horizontally according to the rail pattern of a track plate, and to sew the moving workpiece by a fixed sewing machine to create a predetermined sewing pattern. In a tracing rail plate used in a sewing device for producing a sewing machine, the portion of the tracing rail where the cart makes a sharp turn is a substantially straight rail arranged on the rotary plate, and the tracing wheels of the cart are arranged on the substantially straight rail. a measuring means for outputting an incoming signal;
A tracing rail plate for use in a pattern sewing device, comprising a rotating plate driving means for rotating the rotating plate by a predetermined angle in response to an arrival signal from the measuring means to connect the substantially linear rail to the advancing side tracing rail. be.

The tracing rail plate of the present invention may be fixed to the floor and the tracing wheels may be attached to the truck, or conversely, the tracing wheels may be fixed and the tracing rails may be attached to the truck and moved.

A pattern sewing device with this type of structure has already been developed by the present inventor.
It was published as Japanese Patent Publication No. 47-28767, and the product is widely sold and has a well-known structure and mechanism.

In addition, as a measuring means for outputting an arrival signal when the tracing wheel of the truck reaches a substantially straight track, a contact point or a timer to detect the approach of the tracing wheel is used as in the embodiment described below, or in the most primitive way, a timer is used. A contact point or a sensor may be provided on a substantially straight track to indicate the arrival of a tracing wheel, and there are a wide variety of means for measuring the arrival of a moving object. It has become a commonly used technique.

Hereinafter, the present invention will be specifically explained with reference to optimum embodiments.

In the figure, 1 is a copying rail plate, 2 is a rail, 3 is a rotating plate, 4 is a substantially linear rail, 5 is a rotating copying wheel, 6 to 15 are driving means, 6 is a wire, and 7 is a rotating plate 3 8 is a bearing, 9 is a bearing step, 10 is a notch that determines the rotation angle of the rotary plate 3 provided in the same step, and 11 is a stopper that engages with the side end of the notch. 12 is a wire anti-slip device attached to the stopper bolt, 13 is a fixing plate to the copying rail plate, 14 is a solenoid, 15 is a return spring, and 16, 16', and 17 are copying wheels. It is a measurement means that outputs an incoming signal when it reaches a straight track, and 1
6 and 16' are contacts operated by the copying wheel 5, 17 is a timer started by the contact, and 18 is a solenoid power switch, which closes after a predetermined time after the timer 17 starts, and also after a predetermined time after the closing of the timer 17. It is set to reopen.

Further, in the figure, A indicates a futon which is the object to be sewn, and a indicates a sewing thread.

In this embodiment, the copying wheel 5 moves along the rail 2,
Facing a point where there is a sharp turn, contact point 16 is first closed by tracing wheel 5, and timer 17 is activated.

Even when the timer 17 starts, it remains in the current state for a short time, and when the copying wheel 5 moves onto the substantially straight track 4 on the rotary plate 3 and reaches the approximate center, the timer 17 is activated and the solenoid power switch is activated. 18 works and solenoid 14
is energized, the solenoid 14 operates, the wire 6 is pulled, and the rotary plate engaged with the wire rotates.

The rotation of the rotary plate 3 is limited to a predetermined angle by the relationship between the notch 10 of the bearing step 9 at the lower part of the rotary plate 3 and the stopper bolt 11, and the substantially linear rail on the rotary plate 3 is similar to the rail 2 on the advancing side. connected to.

Moreover, at the same time, the tracing wheel 5 only swings, and the cart changes its posture.

First, the traveling direction is only momentarily changed, and as the tracing wheel 5 further advances, the tracing wheel 5 truck changes direction (turns 90 degrees in the figure) and moves at the same speed.

Therefore, the truck driven by the copying wheel 5 can change direction instantaneously at the same speed, and if the sewing machine is operated during this time, the sewing thread will be sewn continuously at the same stitch pitch and neatly at right angles, as shown in FIG. It will be sewn by changing direction.

When the copying wheel 5 transfers to the rail 2 on the advancing side, the timer 17 is activated.
The solenoid power supply switch 18 is opened by the contact 16' or the solenoid 14 is deactivated, and the rotary plate 3 is returned to its original state by the restoring force of the return spring '15.

As described above, according to the present invention, by adopting the structure having the above characteristics, (a) even sewing patterns with sharp bends such as right angles, acute angles, etc. can be sewn continuously, and there is no need for locking stitches.

(b) There is continuity of the sewing thread, the pitch of the sewing thread is uniform, and the sewing thread does not cross unnaturally at that point.

(c) Due to reasons (a) and (b), the sewing pattern of the workpiece is beautifully finished.

b) The mechanism is relatively simple, and the carriage can be moved at the same speed, reducing the time required for sewing work.

It has a very practical effect.

[Brief explanation of the drawing]

Fig. 1 A9 is an explanatory diagram showing a rail pattern for turning at right angles, Fig. 2 is a plan view showing an embodiment of a tracing rail plate used in the pattern sewing device of the present invention, and Fig. 3 is an illustration of the same embodiment. A vertical cross-sectional view showing the main parts, Fig. 4 is a plan view showing the notch in the bearing stepped portion of the rotating plate, Fig. 5 is an explanatory view showing the process of right-angle rotation, and Fig. 6 is the tracing rail plate of Fig. 2. FIG. 7 is an explanatory diagram showing the entire sewing device. 1: Copying rail plate, 2: Rail, 3: Rotating plate, 4: Substantially straight rail, 5: Copying wheel, A: Futon, a: Sewing thread.

Claims (1)

[Claims] 1 A tracing rail used in a sewing device that creates a predetermined sewing pattern by driving a trolley on which a workpiece is stretched to run vertically and horizontally according to the rail pattern of a tracing rail plate, and sewing the moving workpiece with a fixed sewing machine. In the board, the tracing rail portion at the point where the truck makes a sharp turn is made into a substantially straight rail arranged on the rotary plate, and the measuring means outputs an arrival signal when the tracing wheel of the truck reaches the approximately straight rail. A tracing rail plate for use in a pattern sewing device, characterized in that it is equipped with a rotary plate driving means for rotating the rotary plate by a predetermined angle in response to an arrival signal from the measuring means and connecting the substantially linear rail to the advancing side tracing rail. .