JPH0442959B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic seam-splitting forming processing device for automatically performing seam-splitting forming processing of a workpiece in sewing processing.

[Conventional technology]

In the processing process of sewn products, as shown in Figure _7a and b, the seam allowance _is
There are many so-called seam splitting processes in which W ₁ a and W ₂ a are folded left and right around the seam line S. For example, for slacks, skirts, jackets, etc., after the lockstitching process, there are various splitting operations such as splitting the front edge, splitting the collar edge, and splitting the center of the back. In the past, finishing was done, or pressing was done after temporarily opening with an iron, but this manual process had the problem of low productivity and high costs as it required a lot of man-hours. In order to solve this problem, a seam split forming processing device (Japanese Unexamined Patent Application Publication No. 1983-1996) has been developed in the past to solve this problem.
31700) has been proposed and implemented.

This device performs the following operations on a workpiece W after lockstitching (see FIG. 7a) placed on the cloth placing table 1. That is, first, the suction pipes (seam allowance opening means) 2 located on both sides of the seam allowances W ₁ a and W ₂ a in the upright state are
Aspirate at points a and 2b (see Figure 9b). Then,
The suction pipes 2a and 2b move in a direction away from each other, and the suctioned seam allowances W ₁ a and W ₂ a are opened to some extent as shown in FIG. 9c. Thereafter, the pressure heating device 3 equipped with a heating means such as an ultrasonic generator is lowered from the initial position by the operation of the air cylinder 4, and its tip 3a is placed above the open seam allowances W ₁ a and W ₂ a. press against. Both seam allowances W ₁ a, W ₂ a with this tip 3a opened
The force that presses the object upward is called the pressing force. In this state, the pressurizing and heating device 3 moves forward (in the X direction) along the seam line S of the workpiece W together with the arm 6 that moves in conjunction with the motor 5, and the seam allowances W ₁ a and W ₂ a are Approximately 5 cm of seam splitting is performed on the front end of the holder, and the holder is then lifted to its initial position. Next, the cloth end clamp part 7
The moving table (cloth holding table) 7 equipped with a, 7b, and 7c moves forward from the initial position to move the workpiece W.
After grasping the front end of the
Of W ₁ a and W ₂ a, the part that has not been subjected to seam splitting is moved onto the processing table 8. Here, the elevated pressurizing and heating device 3 is moved onto the processing table 8 by the operation of the motor 5. Then, air cylinder 4 again
It is lowered by the operation of , and pressed by the tip part 3a against the end of the part where the seam splitting process was previously performed. After this,
The moving table 7 moves rearward, and the workpiece W is moved relative to the pressurizing and heating device 3. the result,
The pressure heating device 3 is also applied to the unprocessed parts of seam allowances W ₁ a and W ₂ a.
The seam splitting process is performed by the tip portion 3a.
In addition, in FIG. 8, 9 is an exhaust pipe provided in the pressure heating device 3, and the air blown out from this pipe 9 creates a seam allowance W ₁ a in front of the tip portion 3a of the pressure heating device 3. , plays the role of opening W ₂ a.

Also, Japanese Patent Application Laid-Open No. 63-31700 (see Figure 7)
A seam split forming processing device for curved seam lines has been proposed. In other words, a cloth-faced opening plate (cloth holding table) having a pair of facing numerous small holes on a vacuum mat having numerous small holes on its surface.
is movably provided, and the workpiece W is fixed thereon by vacuum suction through a small hole. Then, in order to make the pressure heating device and the seam allowance opening means follow the seams, an image processing device or the like is used to recognize the curve of the seam allowance, and thereby the pressure heating device, etc. is moved in the X and Y directions. I'm trying to get them to follow suit.

Note that the pressure heating device can be moved in the vertical direction by a screw drive motor.

[Problem to be solved by the invention]

As mentioned above, in the case of the conventional seam split forming processing device, during processing, the pressurizing and heating device 3 is lowered from the initial position to a certain processing position by the operation of the air cylinder 4, and the seam allowance W ₁ a is lowered from the initial position to a certain processing position. , W ₂ a, the pressing force on the seam allowances W ₁ a and W ₂ a is approximately constant. Therefore, even if the type of workpiece W and the thickness of the cloth change, this pressing force does not change, so if the seam splitting work is performed under these conditions, depending on the type of workpiece W and the thickness of the cloth, the pressing force will not change. Problems such as scratches and scorching occurred, and the relative positions of the tip 3a of the pressurizing and heating device 3 and the seam allowances W ₁ a and W ₂ a were shifted.

For this reason, the pressure heating device is attached to a mounting base that is screwed into a vertically held screw shaft, and the pressure heating device can be moved together with the mounting base to a desired height by rotation of the screw shaft. Some have also been proposed. According to this, it is possible to precisely set the height of the pressurizing and heating device in correspondence with various cloth thicknesses, and it is possible to solve the above-mentioned problems.

However, even with this device, if the cloth has slight bends, wrinkles, or unevenness in the cloth, the tip of the pressure heating device will still catch it, causing the workpiece to be processed. Objects may shift or cloth may press against each other in a wavy manner.

This invention has been made in view of the above-mentioned problems, and aims to provide a seam-splitting forming processing device that can perform appropriate seam-splitting processing on workpieces of any type and thickness. purpose.

[Means to solve the problem]

This invention lowers the tip of a pressurizing and heating device that is raised and lowered by a lifting mechanism to the seam allowance of a workpiece opened by a seam allowance opening means, and also includes a cloth holding table that holds the workpiece. In an automatic seam splitting forming processing device that folds a seam allowance portion along a seam line by overlapping the non-seam allowance portion by moving the pressure heating device relatively, the pressure heating device a holding member that is mounted so as to be freely raised and lowered and that moves in orthogonal horizontal directions; a biasing unit that applies upward pressure to the pressurizing and heating device; and an adjustment unit that adjusts the pressing force of the biasing unit. means, presetting each appropriate pressing force on the seam allowance for input data of the type of each workpiece and cloth thickness, and setting the corresponding preset appropriate pressing force on the seam allowance of the pressure heating device. control means for controlling the upward pressing force by the urging means by the adjustment means so as to match the pressing force, the pressurizing and heating device being able to move up and down via the urging means with an appropriate pressing force; The method is characterized in that the seam allowance is elastically pressed in the vertical direction or the seam allowance is repeatedly pressed and released in the vertical direction to move horizontally and bend the seam allowance.

[Effect]

In this invention, the pressurizing and heating device presses the seam allowance with a certain degree of freedom in the vertical direction, and the seam splitting process can be performed while dealing with steps and irregularities in the seam allowance. In addition, when changing the pressing force to the seam allowance, it can be changed by adjusting the upward pressing force by the biasing means using the adjustment means, and it can be changed to any type and thickness of the seam allowance. Appropriate pressing force can be applied.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 6. Note that the same or equivalent parts as in the conventional example are given the same reference numerals, and detailed explanation thereof will be omitted.

FIG. 1 is a diagram showing essential parts in a first embodiment of the present invention. In the figure, reference numeral 11 is a vacuum mat 12 serving as a cloth holding table, on which a pressurizing and heating device is mounted such that it can be raised and lowered by a predetermined driving means (not shown), and is movable in orthogonal horizontal directions (X, Y). It is an arm (holding member), and a pair of guide portions 11b and 11c extending perpendicularly to the vacuum mat 12 are provided protruding from its vertical surface 11a. In addition, numerous small holes 12a are formed on the surfaces of the vacuum chamber 12 and the pair of cloth holding tables 12b, which communicate with a vacuum chamber (not shown). 12b. Reference numeral 13 denotes a screw rotation motor attached to the vertical surface 11a of the movable arm 11 via a mounting portion 11d, and a screw shaft 15 is vertically connected to this motor 13 via a coupling ring 14. Reference numeral 16 denotes a first movable table which is screwed onto the screw shaft 15 and whose side end portion is fitted into the guide portion 11b so as to be movable up and down.
Together with the screw shaft 15 and the screw shaft 15, it constitutes an adjusting means.
Reference numeral 17 denotes a second movable table whose side end portion is fitted into the guide portion 11c of the movable arm 11 so as to be movable up and down;
This second movable base 17 is located below the first movable base 16 and is suspended from the first movable base 16 by a coil spring 18.

This coil spring 18 has its lower end hooked to the protrusion 17a of the second moving table 17, and its upper end hooked to the lower end of the screw shaft 19 inserted through the first moving table 16. Further, the screw shaft 19 is connected to the first movable table 1 by a locking plate 20 fixed above the screw shaft 19.
A load cell 21 is interposed between the locking plate 20 and the first moving table 16 . This load cell 21 detects the downward tensile force applied to the locking plate 20 via the coil spring 18, and outputs a voltage corresponding to the tensile force. 22 is a pressure heating device fixed to the second movable table 17. This pressure heating device 2
2 includes an ultrasonic horn section 22a having a cloth pressing section 22a ₁ at its tip and an ultrasonic oscillator 22b provided above the horn section 22a, so that the cloth pressing section 22a ₁ is heated by the ultrasonic oscillator 22b. ing.

Further, 23 is a digital display that displays the tensile force detected by the load cell 21. In FIG. 1, 2a and 2b are suction pipes, and 9 is an exhaust pipe, both of which have the same functions as those shown in the prior art.

FIG. 2 is a diagram showing a control system circuit in this first embodiment. In the figure, 24 is the CPU 24a,
This is a well-known microcomputer consisting of a ROM 24b, a RAM 24c, etc., and the CPU 24a of the microcomputer 24 controls the screw rotation motor 13, according to the detection output from the load cell 21, input data from the input device 25, etc.
Drive circuits 13a and _22b1 of the ultrasonic generator 22b, and a drive mechanism of the movable arm 11 (not shown)
It is designed to control the operations of other parts.

When performing processing work with the seam split forming processing device having the above configuration, the operator first inputs the type (knit, woolen fabric, chemical fiber, etc.) and thickness of the workpiece W using the input device 25. . Then,
Data such as the appropriate pressing force Fo and moving speed for each type and cloth thickness, which have been stored in advance in the RAM 24c, are read out by the CPU 24a. Next, when the workpiece W as shown in FIG. 7a is fixed at a predetermined position on the fabric holding table 12b placed on the vacuum mat 12 and a processing start command is input, the following seam dividing processing is started. . That is, first, the suction pipes 2a, 2b open the front ends of the seam allowances _W1a , _W2a to the left and right as in the conventional technique (see Fig. 9), and the upper ends of the seam allowances _W1a , _W2a are opened to the left and right (see Fig. 9). The cloth pressing part 22a ₁ of the pressurizing and heating device 22 is lowered to set the seam allowance W ₁ a,
Press W ₂ a. At this time, the pressing force F applied to the seam allowances W ₁ a and W ₂ a is derived from the total self-gravity F ₁ of the first movable table 16 and the pressure heating device 22 as shown in FIG. It is the value obtained by subtracting the generated elastic force F ₂ (F ₁ <F ₂ ). Note that this elastic force F ₂ changes in proportion to the length (extension amount) Δl of the coil spring 18 extended from its natural length l by the total self-gravity F ₁ . That is, the elastic force F ₂ =kΔl (k is the spring constant of the coil spring 18).

Further, since the locking plate 20 presses the load cell 21 downward due to the elastic force F ₂ of the spring 18 and its own weight, a signal corresponding to the pressing force is sent from the load cell 21 to the CPU 24a.

Then, the calculated pressing force is displayed on the display 23, and the pressing force F and the above-mentioned RAM 24c are displayed.
Compare with the appropriate pressing force F ₀ read from .
If the two values F and _F0 do not match, the screw rotation motor 13 is driven to rotate the screw shaft 15, and the first moving table 16 is moved upward or downward, and the amount of extension of the coil spring 18 is By changing Δl
Match F ₀ and F. For example, if the pressing force F calculated by the CPU 24a is larger than the appropriate pressing force F ₀ (F>F ₀ ), the first moving table 16
is increased to increase the amount of extension Δl of the coil spring 18, thereby increasing the elastic force _F2 . As a result, the pressing force F applied to the seam allowances W ₁ a and W ₂ a decreases, and when F ₀ and F match, the motor 13
to stop. Conversely, if F<F ₀ , the first moving table 16 is lowered to match the appropriate pressing force F ₀ . After setting the appropriate pressing force F ₀ in this way, the CPU 24a operates a drive means (not shown),
The workpiece W stored in the ROM 24b in advance
The pressurizing and heating device 22 is moved horizontally together with the movable arm 11 according to the stitch shape data (see Fig. 4), and the fabric pressing portion _22a1 of the device 22 removes the seam allowance.
Apply seam splitting to the entire area of W ₁ a and W ₂ a. In addition,
In the process of moving this cloth pressing part _22a1 , the seam allowance
Even if there are small wrinkles or steps on W ₁ a and W ₂ a, the pressure heating device 22 can
8, and is movable up and _down .
It moves smoothly while overcoming wrinkles and steps. Therefore, the seam splitting process can be performed reliably without the workpiece W shifting or derailing (deviating from the seam allowance) as in the conventional case.

FIGS. 5 and 6 show a second embodiment of the invention, which will be explained below. Note that the same or equivalent parts as in the first embodiment are given the same reference numerals, and detailed explanation thereof will be omitted.

In the figure, 27 is the vertical plane 1 of the moving arm 11.
1a is an air cylinder (biasing means) attached via a cylinder support 28, and the tip _27a1 of the cylinder rod 27a is a second movable base that fits into the vertical surface 11a of the movable arm 11 so as to be movable up and down. 17 is supported from the bottom surface. Further, this air cylinder 27 is connected to an air source 31 via an adjustment means consisting of a solenoid valve 29 and a pressure regulator 30, and by opening the solenoid valve 29 and supplying air, the cylinder rod 27a protrudes upward. The second moving table 17 and the pressurizing and heating device 22 are raised. Further, 32 is a cushion as a shock absorber made of an elastic body attached to the cylinder support base 28, and has an operating portion 32a that is elastically biased upward. It is designed to reduce the impact when the moving table 17 descends.

33 is CPU33a, ROM33b and RAM3
It is a well-known microcomputer consisting of 3c, etc., and it is a well-known microcomputer consisting of a
33b and RAM 33c, the CPU 33a controls the operations of the electromagnetic valve 29, pressure regulator 30, and other parts.

In addition, the pressure heating device 22, the vacuum mat 1
2 and the vertical surface 11a of the movable arm 11 are substantially the same as those in the first embodiment, and although not particularly shown, there is a suction pipe and an exhaust gas near the pressurizing and heating device 22 as in the first embodiment. Pipes etc. are provided.

The second embodiment of the present invention is configured as described above, and when the workpiece W is placed on the vacuum mat 12 and a machining start command is input,
The CPU 33a moves the moving arm 11 based on the stitch shape data stored in the ROM 33b and the RAM 33c, as well as data on the appropriate pressing force, moving speed, adjustment means, etc., and also opens and closes the solenoid valve 29 intermittently to open and close the air cylinder. 27 cylinder rod 2
7a to move up and down, and move the second moving table 17 up and down. As a result, the presser foot 2 of the pressurizing and heating device 22
2a ₁ moves along the seam while pressing and releasing the seam allowances W ₁ a and W ₂ a, and the seam allowances W ₁ a and W ₂ a are pressed when the cloth pressing part 22a ₁ descends. It is bent under pressure and split into seams. In addition, in this processing operation, the pressure heating device 22 and the second moving table 1
7 falls due to its own weight, so if it is allowed to fall as it is, there is a risk that marks from the small hole 12a of the vacuum mat 12 will be left on the workpiece W due to the impact during the descent. Since the shock is provided by the cushion 32 that contacts the lower surface of the workpiece W, it is possible to prevent excessive impact from being applied to the workpiece W.

In this way, in this second embodiment, the pressurizing and heating device 22 is moved up and down, and the seam allowance is pressed down and then released. When splitting the seam allowances W ₁ a and W ₂ a of a strong workpiece W,
In the first embodiment, it is necessary to slow down the moving speed under an appropriate pressing force, but in the second embodiment, good seam splitting can be performed at a fairly fast moving speed.

In the first and second embodiments described above, the workpiece W is fixed on the cloth holding table 12b placed on the vacuum mat 12, and the pressurizing and heating device 22 is moved relative to the moving arm 11 in the X and Y directions. The explanation has been given using an example in which seam splitting can be performed on a curved seam allowance by moving the workpiece. W may be moved relative to the pressure heating device 22.

Further, the pressure heating device is not limited to one using the ultrasonic heating device 22 as shown in the above embodiment, but other devices having heating means may be used. For example, a device having a heating device such as steam, heater, laser, high frequency, magnetron, etc. may be used, and the same effect can be expected with any of them.

〔Effect of the invention〕

As explained above, according to the seam split forming processing apparatus according to the present invention, the pressure heating device is attached to the holding member so as to be able to rise and fall freely, and the pressure heating device is attached to the holding member to apply upward pressure. A biasing means is provided, and an adjusting means for adjusting the pressing force by the biasing means and a pressing force of the pressurizing and heating device on the seam allowance for the type of workpiece and cloth thickness match a preset appropriate pressing force. By being equipped with a control means, it is possible to apply an appropriate pressing force to the seam allowance of the workpiece, regardless of its type and thickness. Since the seam allowance is bent by pressing or repeatedly pressing and releasing in the vertical direction to move horizontally and bend the seam allowance, it can accommodate steps and irregularities in the seam allowance.
Excellent seam splitting can be performed without causing the workpiece to shift or the fabric to overlap in a wavy manner.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a first embodiment of the invention;
Fig. 2 is a block diagram showing the control system of the same embodiment, Fig. 3 is an explanatory side view showing the operating state in the same embodiment, and Fig. 4 is a partially enlarged perspective view showing the seam splitting state in the same embodiment. , FIG. 5 shows the second example of this invention.
FIG. 6A is an overall explanatory view showing the front appearance and control system of the embodiment; FIG. Figure a is a perspective view of the workpiece before seam splitting, Figure b is a perspective view of the workpiece after seam splitting, and Figure 8 is a perspective view of a conventional seam splitting forming processing device. Figures 9a, b, and c are the 8th
It is an explanatory front view showing operation of a suction pipe shown in a figure. DESCRIPTION OF SYMBOLS 11... Holding member, 12... Cloth holding table (vacuum mat), {13... Screw rotation motor, 15... Screw shaft, 16... First moving table} Adjustment means, 18... Coil spring (attached) force), 27
... Air cylinder (biasing means), {29 ... Solenoid valve, 30 ... Pressure regulator} Adjustment means, W ₁ , W ₂ ...
...Cloth, W...Workpiece, W ₁ a, W ₂ a...Seam allowance.

Claims (1)

[Scope of Claims] 1. A workpiece made by sewing together multiple layers of cloth with a seam allowance left, the non-seam allowance portion is laid out horizontally along the seam line so that the seam allowance stands up. The seam allowance is opened left and right along the seam by a seam allowance opening means, and the pressurized heating is moved up and down by a lifting mechanism onto the opened seam allowance. By lowering the heated tip of the device and moving the pressurizing and heating device and the fabric holding table relatively, the seam allowance portion is folded along the seam line so as to overlap the non-seam allowance portion. In the automatic seam splitting forming processing device, the pressurizing and heating device is mounted so as to be movable up and down,
a holding member that moves in orthogonal horizontal directions; a biasing device that applies upward pressure to the pressurizing and heating device; an adjusting device that adjusts the pressing force of the biasing device; and types of each workpiece. and setting in advance each appropriate pressing force on the seam allowance with respect to the input data of cloth thickness, and adjusting the pressing force so that the pressing force on the seam allowance of the pressurizing and heating device matches the corresponding preset appropriate pressing force. control means for controlling an upward pressing force by the urging means, and the pressurizing and heating device elastically presses the seam allowance in the vertical direction via the urging means with an appropriate pressing force. An automatic seam split forming processing device characterized in that the seam allowance is folded by horizontally moving the seam allowance by repeatedly pressing and releasing the seam allowance in the vertical direction.