JPH0444795A - Cloth feed quantity control device connected to industrial sewing machine - Google Patents

Abstract

PURPOSE:To attain uniformity in quality and raise work efficiency by providing a means for making sewing action consecutively after dividing a sewing area into plural positions previously to freely set auxiliary feed quantities in response to various kinds of sewing. CONSTITUTION:A drive mechanism for driving stepwise an auxiliary feed mechanism is connected to said auxiliary feed mechanism. There is provided a means for dividing a sewing area into plural positions previously to make sewing action consecutively. There is also provided a means for controlling the drive quantity of the auxiliary feed mechanism by the above-mentioned drive mechanism at the respective divided positions and setting the auxiliary feed quantities in plural steps, and in the similar way, there is provided a cloth feed quantity-control device in the respective divided positions while providing possibility for selecting non-operation where shifting to the next position automatically takes place. An auxiliary feed quantity suitable for a sewing area is set arbitrarily in the respective divided positions to consecutively and also no-operation is selected at respective positions, the sewing action automatically shifts to a next position. Consequently, the number of division is substantially reduced, and thus the sewing action is conducted by setting arbitrarily the number of division, i.e., the number of sewing steps, in conformity to the purpose of sewing.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention is connected to an industrial sewing machine in which a cloth feeding mechanism is composed of a main feeding mechanism and a sub-feeding mechanism, and controls the amount of sub-feeding to be switched in stages. It is related to the device.

[Prior Art] Conventionally, in order to perform crimp stitching on a part of the fabric to be sewn to form gears, or to sew two pieces of fabric together by applying crisscross stitching, the cloth feed mechanism has been used as the main feed mechanism. An industrial sewing machine is used, which is composed of a sub-feed mechanism and a sub-feed mechanism. These sewing machines control the sub-feeder ellipse to vary the sub-feed amount, and perform sewing with a predetermined differential amount and swivel feed amount.

For example, a vertical feed sewing machine used for sewing sleeves, etc. is configured to vary the amount of feed of the upper and lower fabrics in front and behind the needle bar using the upper feed dog and the lower feed dog to provide an uneven feed trough. As for the sub-feed amount, that is, the initial feed amount, there are methods in which the operator directly adjusts or decreases the sub-feed mechanism using a lever, pedal, etc., and devices in which the initial feed amount is set in advance by a program.

[Problem to be solved by the invention] However, when an operator adjusts and subtracts the amount of sub-feed to vary it, the operator relies on experience and is required to be highly skilled, which does not improve productivity and results in a constant There is a drawback that quality cannot be obtained.

On the other hand, if the sub-feed amount is varied by program settings, the sewing machine becomes extremely expensive and the load on the equipment increases, and the program must be changed each time it is used for a wide variety of sewn products. It took a lot of time and money to set up the program, which was unsatisfactory.

The purpose of this invention is to solve these problems by providing a control device that can be connected to a conventional industrial sewing machine and can change the sub-feed amount step by step with a simple operation. The purpose is to provide The purpose is to make it possible to freely set the sub-feed amount in response to various types of sewing, to achieve uniform quality, to improve work efficiency, and to reduce the burden on equipment. .

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a cloth feed amount control device connected to an industrial sewing machine in which a cloth feed mechanism is configured by a main feed mechanism and a sub-feed mechanism. A drive mechanism for driving the sub-feeding mechanism in stages is connected to the sub-feeding mechanism. Further, there is provided a means for dividing the sewing area into a plurality of positions in advance and sewing them sequentially, and a means for controlling the drive amount of the sub-feed mechanism by the drive mechanism at each of the divided positions to set the sub-feed amount in a plurality of stages. The fabric feed amount control device is configured such that at each divided position, it is possible to select non-operation to automatically move to the next position.

Then, after the forward stroke in which each divided position is sewn in sequence, the cloth is fed by providing a selectable automatic mode in which it automatically shifts to the reverse stroke and sews in sequence, and a fixed mode in which it is fixed in the forward stroke or reverse stroke. A quantity control device can be configured.

Alternatively, a feed switch of a hood switch provided at the knee position or the like may be used to sequentially move to the next divided position.

[Function] Therefore, when the cloth feed amount control device of the present invention arbitrarily sets the sub feed amount suitable for the sewing location at each divided position and sequentially sews, and selects non-operation at each position,
The sewing machine automatically moves to the next position, and the number of divisions is substantially reduced, and the number of divisions, that is, the number of sewing steps, is arbitrarily set to suit the sewing purpose.

Then, the automatic mode and fixed mode are configured to be selectable, and symmetrical sewing locations can be sewn continuously in automatic mode, or the fixed mode can be selected and right and left strokes can be sewn individually and continuously. is set to

Further, if the feed switch of the hood switch provided at the knee position or the like is configured to sequentially move to the next divided position, the transition operation of the sewing process can be easily performed.

Below, the configuration of the present invention will be specifically explained using the drawings.

[Embodiment] The drawing shows an embodiment in which a cloth feed amount control device of the present invention is connected to a vertical feed sewing machine (10) that sews together two pieces of fabric, upper and lower, by applying a sloping feed trough.

In Fig. 1, the vertical feed sewing machine (10> is the top feed @
(12) and a lower feed dog (13) facing each other are formed below the needle bar (15). This is a currently widely used method that can be used to increase the flow rate of the trough by varying the height. Inside the sewing machine body (11), known drive mechanisms are housed, including a main feed mechanism that drives the lower feed dog (13) and a sub feed mechanism that drives the upper feed dog (12). a main feed amount adjustment dial (16) for setting the main feed amount of the lower feed dog (13);
Adjust the upper feed amount to set the sub-feed amount of the upper feed dog (12), that is, the initial feed amount.
This is a general configuration in which the upper feed amount is set by operating the upper feed amount adjustment lever (17).

A drive shaft (19) is interlocked with the upper feed amount adjustment lever (17) via a free joint (18), and the drive shaft (19) passes through the top plate (20) so as to be freely movable in the axial direction. A drive mechanism (30) that extends downward and drives the drive shaft (19) in the axial direction is installed on the lower surface of the top plate (20).

Drive machine fl! (30) is a slide bearing (32)
A slide rod (33) is movably connected to the fixed shaft (31) through the drive shaft (19).
), three contact members (34) are attached to the slide rod (33) at predetermined intervals, and three air cylinders ( 35). A solenoid valve (38) is interposed in the air passage (37) of each air cylinder (35), and the solenoid valve (38) is opened to operate the air cylinder (35), and the rod (36) at the tip of the solenoid valve (38) is opened to operate the air cylinder (35).
contacts the contact member (34) and moves the slide rod (33) and drive shaft (19) upward. Each contact member (34
) is attached to the slide rod (33) so that its position, that is, the amount of protrusion toward the air cylinder (35) can be varied, and the three contact members (34) have different amounts of protrusion, and the solenoid valve (38) ) to operate the air cylinders (35) individually, and set the travel amount of the drive shaft (19), that is, the upper feed amount adjustment lever (17) at multiple stages, so as to drive in stages. It is configured.

FIG. 2 shows an operating device (40) in the form of a box, which is used by being attached to a position suitable for operation, such as on the sewing machine body (11) (see FIG. 1). On the front operation surface (41),
When used for symmetrical sewing locations such as right sleeve R1 and left sleeve sleeve shown in Figure 3, there are automatic modes that sew right and left strokes in succession, and sewing of right or left strokes. Rotary switch to select fixed mode and fixed mode <4
2) is provided. An analog type thumb rotary switch is provided in the control circuit to divide the sewing area into 7 areas in advance, and settings are made from 0 to 4 using the decrease button (43) and increase button (44), and the display frame <45> An operation indicator lamp (46) is provided that is displayed on the screen and lights up when each position is in operation. In order to sequentially move to the next divided position, as shown in FIG. 1, a feed switch (60) of the hood switch that the operator presses with his or her knee is provided at the knee position.

The hood switch may also be formed by a pedal located under the foot.Left and right indicator lamps (48) are also provided on the operation surface (41) to display the operating status of the right stroke and left stroke. Home return switch (50) to return to the standard state
is provided.

Fig. 4 is an example of the operating circuit when the automatic mode is selected with the operating device (40). SA1 to SA7 are the thumb rotary switches mentioned above and are set to O to 4, and each data output 2 to 4 is the individual data output. Input to wired OR circuit DWOR, D
Amplifiers 1 to 3 are connected after the WOR, and output 2 is input to amplifier 1, output 3 is input to amplifier 2, and output 4 is input to amplifier 3 individually.

0WOR is a wired OR circuit that inputs the outputs O of SA1 to SA7, and an oscillator is connected to the latter stage.

5QLI~3 are each solenoid of the above electromagnetic valve (38),
The amplifiers 1 to 3 are energized, the solenoid valves (38) are opened, and each air cylinder (35) is actuated to open the drive shaft (19).
), and the movement amount of the drive shaft (19) is set to be large in the order of 5OL1.5QL2.5OL3. OR1-4 are OR gates, INV is an inverter, TF
F is a T-749777071 circuit. The PC is a presettable counter that is preset to 1.7 using the data from the preset data creation circuit of PS1 and PS7, and is switched to an up counter and a down counter in the state of the up/down switching pin U/D, and is connected to the decoder DEC. The DEC outputs 1-7 drive SAI-7. Sl is the above-mentioned sending switch (60), and the clock pulse input bin Cp of the PC is sent via the waveform shaping circuit and OR1.
It is connected to the. S2 is the home return switch (50
), when connecting to a sewing machine with a thread trimming function, connect the thread trimming switch RYI in parallel with 82, and
The input is changed to the DEC output of 0.8 (see the broken line in the figure).

FIG. 5 shows an example of the operating circuit when the fixed mode is selected with the operating device (40), and R3 is the rotary switch (42).
), OR5 and OR6 are OR gates, and AND1-7 are AND gates.

Next, the specific operation for sewing the sleeve attachment shown in FIG. 3 will be explained.

The left sleeve R1 left sleeve is divided into 6 parts with notches engraved with ■～■, with the seam position of the side seam in the best season as 0.
Use the decrease button (43
) and the increase button (44) to set SA1 to SA7. As will be described later, 1 means no Ise feed amount, 2.3.4 means the Ise feed amount increases step by step, and 0 means no operation, that is, this position is skipped and automatically moves to the next position. is set to . Here, SAI ~ 7 is 1.2.4.3.2
．． Set to 0.1.

First, a case will be described in which the rotary switch (42) is used to select the automatic mode for sequentially sewing the left sleeve R1 left sleeve.

In Figure 4, when the power is turned on and the pulse input is applied, the TFF q
is at H level, PC is preset to 1 with PSI data through OR4 and the differential circuit, and U/D is H″cPC
operates as an up counter, and the left and right display lamps (48
) display cloth lights up. When the DEC output is 1, the SAI becomes active and the operation indicator lamp (46) lights up. S
Since AI is set to 1, there is no output and DWOR is L.
level, 5QL1 to 3 are not energized and the solenoid valve (38
) are all opened. Therefore, the drive shaft (19) is not driven and the left sleeve R is sewn from the 0 position to the ■ position without any feed rate.

When the feed switch S1 is operated in position (2), a pulse is input to Cp via the waveform shaping circuit and ORI, the number of PCs increases, and the output of DEC becomes two. Then, the mouth lights up and S
A2 becomes active, SA2 is output 2 and is input to amplifier 1 via DWOR, 5OLl is excited and the corresponding air cylinder (35) is operated, sewing up to the position ■ with the feed rate according to setting 2. do. In this way, SL is operated sequentially, 5OL3 is excited by the output 4 of SA3, 'S Q L 2 is excited by the output 3 of SA4, and S Q L is excited by the output 2 of SA5.
Energize QL 1 and sew up to the position ■ at the feed rate according to the settings.

With the next operation of 81, SA6 becomes active, and SA6 outputs 0.
A pulse is input to Cp via the oscillator and ORI, and the PC is incremented, and the output of the DEC becomes 7. Therefore, the position of SA6 is skipped and the next SA7 is automatically activated, and with the output of SA7 being 1, the end point 0 is reached without the feed amount, and the sewing of the left sleeve R is completed.

Here, the output of the DEC is inputted to ``OR2'', and the pulse is inputted to the TFF via the differentiating circuit and OR3.
is inverted to H and L. Then, the PS7
With the data, the PC is preset to 7, υ/D is inverted to L, the PC operates as a down counter, the display cloth is lit, and the left axis is sewn from O as the starting point.

Initially, the DEC output is 7, SA7 becomes active, and then S
1 is activated to reduce the number of PCs, and sewing is performed in the reverse stroke of SA7 to SA1. In this way, the left sleeve R1 left sleeve edge is sewn symmetrically with a predetermined crisscross feed amount.

If the home return switch S2 is activated during work, OR3 will be activated.
A pulse is input to the TFF via the TFF, and Q and Q are inverted each time. Therefore, the U/D state of the PC is inverted, the PC is preset with the PSI or PS7 data, and the DEC output is returned to the reference points at both ends of 1 or 7. In a sewing machine that has a thread trimming function, the sewing machine finishes sewing the left sleeve R1, the thread trimming switch RYI is closed, and the O
It is input to the TFF via R3, and the state of 110 of the PC is inverted, and the output of the DEC is fixed at the reference point 1 or 7 using PS1 or PS7, and the process moves to the next step. Therefore, since there is no need to input a pulse to the TFF using the output 1 or 7 of the DEC, the configuration is such that the output 0.8 of the DEC is input to the OR2.

Next, a case where the rotary switch (42) is used to fix the sewing of the left sleeve R1 to the left sleeve will be described.

In FIG. 5, when the right is selected with the rotary switch (42), the RS closes to the right, U/D is H, the PC operates as an up counter, and the display cloth of the left and right indicator lamps (48) lights up. When the power is turned on, the output of AND6 becomes H, and O
R5, pc is preset to 1 via PSI, DE
SAI becomes active at output 1 of C. Then, as in the previous example, S1 is operated one after another, the number of PCs is increased, and the left sleeve R is sewn with each setting of SA1 to SA7. Then, when the sewing is finished, the output of DEC becomes 8, the output of AND2 becomes H, and OR5,
The PC is again preset to 1 via the PSI and the next left sleeve R can be sewn in succession.

Next, select the left with the low reswitch (42), and R
3 closes to the left, 11/D is L'''C'PC operates as a down counter, and the display cloth lights up.Turn on the power and press AN
The output of D7 becomes H and is sent to the PC via OR, 6, and RS7.
is preset to 7 and starts from SA7 with the DEC output cuff. Then, S1 is operated in sequence, pc is decremented, and the left axis is sewn in the reverse stroke of SA7 to SA1. When the sewing is finished, the DEC output is O and the ANDI output is H, and the PC is preset to 7 via OR6 and RS7, and the next left-axis sewing can be continued.

When 82 is activated during work, if R3 is on the right, AN
The output of D3 becomes H, PC is preset to 1 via PSI, and when R3 is on the left, the output of AND4 becomes H, pc is preset to 7 via RS7, and each returns to the initial reference point. Ru.

Note that the configuration of the present invention is not limited to the drawings,
Depending on the industrial sewing machine to be connected, the drive machine f! (30)
may be installed at an appropriate position such as the top surface of the top plate (20), and an air cylinder (35) may be installed on the drive mechanism (30).
It is also possible to use a step motor instead and to set the sub-feed amount in more steps. Further, the feed switch may be configured to be manually operated instead of the hood switch.

[effect] The characteristic effects of this invention are as follows.

By dividing the sewing area into multiple positions in advance, arbitrarily setting the sub-feed amount suitable for the sewing area at each divided position, and selecting non-operation at each position, the number of sewing processes can also be varied. It can handle various sewing products and sewing locations such as forming gears and attaching sleeves, differential sewing, and sewage feed, and can easily change the number of sewing processes and sub-feed amount after checking with trial sewing. Optimal settings can be made, no skill is required, and uniform quality and improved work efficiency can be achieved.

Since it is configured to be connected to a conventional industrial sewing machine, a sub-feed amount program setting function can be added with a simple modification, and the burden on the equipment can be significantly reduced. The main feed mechanism and the sub-feed mechanism are connected to various sewing machines such as vertical feed sewing machines, overlock sewing machines with differentials, block stitch sewing machines with differentials, and interlock sewing machines with differentials, which constitute a cloth feeding mechanism. It can be used and is applicable to various industrial sewing machines.

In addition, by providing automatic mode and fixed mode that can be set, it is possible to select the automatic mode for continuous sewing of left-right symmetrical sewing locations, and also to select the fixed mode for continuous sewing individually. User B can be freely selected in consideration of the work procedure.

In addition, if the feed switch that sequentially moves to the next divided position is configured to be activated by a hood switch at the knee position, etc., the feed operation can be performed smoothly and has practical effects such as excellent workability. It is.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view of a vertical feed sewing machine with a drive mechanism installed, Fig. 2 is a perspective view of the operating device, Fig. 3 is an explanatory diagram of sleeve attachment, Fig. 4, FIG. 5 is a circuit diagram showing some of the elements in block form, FIG. 4 showing the automatic mode of operation and FIG. 5 showing the fixed mode of operation. 10... Vertical feed sewing machine, 30... Drive mechanism, 40-
...Operating device, 60...Feed switch

Claims (1)

[Scope of Claims] 1. A cloth feed amount control device connected to an industrial sewing machine in which a cloth feed mechanism is constituted by a main feed mechanism and a sub-feed mechanism, wherein the sub-feed mechanism is connected to the sub-feed mechanism in stages. A means is provided in which a drive mechanism that is driven symmetrically is connected, a sewing area is divided in advance into a plurality of positions, and the sewing area is sequentially sewn, and at each divided position, the drive amount of the sub-feed mechanism by the drive mechanism is controlled to adjust the sub-feed amount. A cloth feed amount control device connected to an industrial sewing machine, which is provided with a means for setting the amount of cloth to a plurality of stages, and is configured such that at each divided position, deactivation of automatically moving to the next position can be selected. 2. A claim that allows selection between an automatic mode in which after a forward stroke in which each divided position is sewn in sequence, the sewing machine automatically shifts to a reverse stroke and sews in sequence, and a fixed mode in which it is fixed in the forward stroke or reverse stroke. 1. A cloth feed amount control device connected to the industrial sewing machine according to 1. 3. The cloth feed amount control device connected to an industrial sewing machine according to claim 1 or 2, wherein the cloth feed amount control device is connected to an industrial sewing machine according to claim 1 or 2, wherein the feed switch of the hood switch sequentially moves to the next divided position. 4. A cloth feed amount control device connected to an industrial sewing machine according to claim 3, wherein the feed switch is provided at the knee position.