JPS6182786A - Sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention provides a method for moving a pallet mounted on a carriage and stretched with work cloth across a vertical movement path of a needle by the operation of a drive means. The present invention relates to a sewing machine that can be moved in a desired direction to perform sewing based on pattern data.

(Prior art) In conventional sewing machines of this type, if the bobbin thread runs out during sewing or some other abnormality occurs in the bobbin thread, it becomes necessary to replace the bobbin thread or conduct a complete inspection. If you stop the sewing machine and palletize? The supporting carriage is manually movable, and in this state, it is manually moved together with the pallet't carriage to a retracted position that does not obstruct replacement of the bobbin thread bobbin, and the bobbin thread bobbin is replaced or inspected.

(Problem to be Solved by the Invention) Therefore, when starting sewing again with this conventional sewing machine, all the carriages supporting the pallet must be sequentially moved from the sewing start point to the previous stop position according to the sewing pattern data. Naranakatsuyuki. This poses a problem in that more time is spent on the auxiliary work compared to the time required to replace or inspect the bobbin thread bobbin itself, increasing the overall working time.

Structure of the Invention (Determined Means for Solving the Problems) The present invention has been made by focusing on the above-mentioned problems. a first control means 25 that fully controls the operation of the drive means 41 so that the pallet 14 moves to the retracted position; a storage means 27 that stores the entire position of the pallet 14 before retraction or the amount of movement thereof to the retracted position; A second control means 25 is provided for controlling the drive means 41 so that the pallet 14 returns to its pre-evacuation position based on the data stored in the memory means 27.

(Function) In the sewing machine of the present invention, if the bobbin thread runs out during sewing or some other abnormality occurs in the bobbin thread, and it becomes necessary to replace the bobbin thread bobbin 5 or perform the dot @ The drive means 41 is operated under the control of the first control means 25, and the pallet 14 or the carriage 13 on which the work cloth 16 is stretched is moved to a retracted position that does not obstruct the exchange of the bobbin thread bobbin 5. The position of the pallet 14 before the evacuation or the amount of movement to the evacuation position is stored in the storage means 27.

After the bobbin thread bobbin 5 is replaced or inspected in this state, the drive means 41 is operated under the control of the second control means 25 based on the data stored in the storage means 21, and the pallet 14 is moved before being retracted. It will automatically move and return to the position. Therefore, there is no need for any auxiliary work associated with replacing or inspecting the bobbin thread bobbin 5, and the overall working time can be significantly shortened.

(Embodiment) An embodiment of the present invention will be explained in detail below with reference to all the drawings. First, the structure of the sewing machine of this embodiment will be explained based on FIGS. 2 and 3. In addition, a bed section 3 is provided at the front of the machine base 1. A needle 4 is provided at the bottom of the front end of the sewing machine body 2 so as to be movable up and down, and a bobbin thread bobbin 5 is installed at the bottom of the bed section 3 via a bobbin holder. A removably housed thread loop catcher 6 is provided, and the stitches are formed by cooperation between the needle 4 and the thread loop catcher 6.

At the front of the sewing machine main body 2, on both the left and right sides of the machine base 1, there are a pair of support rails extending parallel to each other in the front-rear direction (Y direction).
I/7 is arranged and fixed 3. A movable frame 9 having a guide rail 8 extending in the left-right direction (X direction) on the upper surface is supported on the supporting rail /I/7 so as to be movable in the Y direction. ,
The rack 10 on the support rail 7 and the gears 12 at both ends of the rotating shaft 11 on the frame 9 side are engaged to be guided in movement. A carriage 13 is supported on the guide rail /l/8 on the moving frame 9 so as to be movable in the X direction, and a pallet 14 is removably attached to the upper surface of the carriage by means of left and right clamps 15. The work cloth 16 is placed on the pallet 14 by a floor holding frame (not shown).
The Buddha's floor support is removable.

An X-direction feed motor 17 is disposed on the machine base 1 in front of the moving frame 9, and as the motor 17 rotates, gears 18, 19, a spline shaft 20, and an illustration movable along the spline shaft 20 are provided. The gear ridge 13 is moved in the X direction via the gear 21 extending along the old edge of the carriage 13, and the pallet 14 is given a feed 9 in the same direction. or,
A Y-direction feed motor 22 is disposed on the machine base 1 in the vicinity of the X-direction feed motor 17. Then, the moving frame 9 is moved in the Y direction, and the pallet 14 is given a feed in the same direction.

Next, the control circuit of this sewing machine will be explained according to FIG. and a random access memory as a storage means (27 is connected to the box A; the ROM 26 controls the origin position data, evacuation position data, work position data, and the operation of the entire sewing machine of the pallet 14). ltA
M27 is predetermined sewing pattern data related to the first pair of shoes;
The amount of movement of the pallet 14 to the retreat position during manufacturing is stored.

A program input device 28 and a floppy disk device 29 are connected to the CPU 25, and sewing pattern data created by the program input device 28 is stored on a floppy disk in the floppy disk device 29, or stored on the floppy disk. All data related to sewing are read into the RA and M27. The CPU 25 also includes a switch group 32 including a start switch 30, a retraction switch 31, etc., a known thread remaining storm detector 33 for detecting the remaining amount r of the bobbin thread in the bobbin thread bobbin 5, and a thread remaining storm detector 33 for detecting the remaining amount r of the bobbin thread in the bobbin thread bobbin 5, and A similarly known thread breakage detector 34 is connected to detect the loosening state, and signals from these switches or detectors are sent to the CPU 25.
It is now entered into When a thread breakage signal is output from the thread breakage detection Ia34, the sewing machine performs a sewing operation i11''.

Furthermore, in the above (book 1125) there is a 7v voltage that drives the sewing machine.
the sewing machine motor 35, the X direction feed motor 17, the Y
When the direction feed motor 22 and the bobbin thread run out, etc.
- An alarm device 36 such as a lap or buzzer that emits 14 alarms is connected via a drive device 37, 38, 39, 40, and is driven by a signal from the CPU under program control. In this embodiment, the X-direction feed motor 17, the Y-direction feed motor 22, and their drive devices 38 and 39 move all the needles 4 of the pallet 14 in a desired direction across the vertical movement path. A driving means 41 is configured for this purpose.

Next, the entire operation of the sewing machine constructed as described above will be explained.

Now, when the power is turned on during the sewing operation of this sewing machine, it is determined in step S1 whether or not the start switch 30 is closed, as shown in FIG. 4, and the result is Y.
In the case of ES, the process advances to step S2 and RAM 2γ
It is determined whether or not valid sewing pattern data is stored. If there is no valid data, the process goes to error processing, and if there is valid data, the process goes to step S3, where the remaining thread amount is measured by the thread remaining amount detector 33vC,l:. Then, the required amount of bobbin thread is calculated according to the sewing pattern and the number of sewing pieces set by the program input device 28 or the floppy disk device 29,
When the remaining amount of bobbin thread is compared with the remaining amount of bobbin thread, if the remaining amount of bobbin thread is insufficient, that is, if the determination result in step S3 is NO, the CPU 25 sends a message to the drive device 4 in step S4.
0 is output to the alarm 36, and the state in which there is no or little bobbin thread in the bobbin thread bobbin 5 is notified, and then the process proceeds to bobbin replacement processing, which will be described later.

Also, the result of step S3 is YJ! : In the case of S, proceed to step 85, and CI' U 25 is ROΔ12.
6 to palette 14 original) Read all 1d position data 9,
Based on the data, an operating signal is output to the X- and Y-direction feed motors 17.22 through the shaft devices 38 and 39', and the pallet 14 is moved to the home position (position A in FIG. 3). move it to Then, in step S6, the CPU 25 inputs the sewing pattern data from RNOYΔ127.
Ta? Read 9, based on the data drive device 311,3
The sewing machine motor, the X and Y direction drive motors 3 are output through 9.40, and the full operating signal is output to 17.22 to operate the needle 4, etc. and move the pallet 14 in the X and Y directions in Fig. 1. .

In step S7, the thread breakage detector 34 outputs a thread breakage signal due to needle thread breakage or loosening, and it is determined whether or not the sewing operation of the sewing machine has been stopped. The process proceeds to step S8, and if YES, the process proceeds to step S9, in which it is notified that the upper thread has been cut due to some other cause, the lower thread has completely disappeared, and the upper thread has become loose.

Then, in the stitch knob S8, it is determined whether or not there is any pattern defect related to sewing remaining in the box AM27, and if the result is YES, the process returns to step S6, and step s6. The operations of s7 and S8 are repeated. Therefore, the pallet 14 on which the work cloth 16 is stretched is attached to the pattern tater made of cotton and is
It is moved arbitrarily in the direction and the specified sewing is performed automatically.

Furthermore, if the determination result in step S8 marked n1■ is NO, that is, if the - cycle sewing has finished, the process advances to step 81G where thread trimming is performed, and then step S81G is performed.
In Step 11, create 1! in the same manner as in step S5 above! +, the pallet 14 is moved to the origin position, and further, in step 812, the pallet 14 is moved to the sewing position 1v [(position B in FIG. 3), and is replaced with a new unsewn pallet at that position. Ru.

10, If the determination result in step S3 is No, +ii. Wait for the evacuation switch 31 to be turned on. When the evacuation switch 31 is turned on, the pallet 14 is moved to the evacuation position (position C in FIG. 3) that does not obstruct replacement or inspection of the bobbin thread bobbin 5 in step S2. Step 81 of
and waits for the start switch 30 to be turned on. Incidentally, when the pallet 14 is placed in the working position, the thread 713 covers the previous number of the bobbin thread bobbin 5, so the replacement and one inspection VC of the bobbin thread, one thread bobbin 15 is inconvenient.

Therefore, with the pallet 14 moved to the retracted position and the upper front part of the thread wheel catcher 6 opened, the bobbin case is taken out from the thread ring catcher 6 and the bobbin thread hobbin 5 is opened. Replacement and inspection can be easily performed.

Further, if the determination result in step Sγ of FIG. 4 is YES, that is, if a thread breakage occurs and a thread breakage signal is output from the thread breakage detector 34, the process advances to step S9 and an alarm is issued as described above. After h is issued, the CPU 25 turns on the sewing machine motor 35 and X.

The operation control for the Y-direction feed motors 17 and 22 is stopped, and scanning of the evacuation switch 31 is started in step S1 in FIG.

Then, when the evacuation switch 31 is closed, the CPU 25 reads the origin position data of the valent 14 from the ROM 26 in step S2, and based on the data, the drive unit 3fl, 39 moves the X.

An operation signal Mf is output to the Y-direction feed motors 17 and 22 to move the pallet 14 to the home position 11'1, and in step S3 it is determined whether the home position has been reached.
This operation is repeated with J separated and valent 14 or 1 moved to the origin position. Also, U P U 25 is FJ11 N,
)' The number of pulses of operation No. 13 to the direction feed motors 1γ and 22 is counted, and in step S4, the number of pulses in the X direction and Y direction in the origin device 1 of the valent 1/ is counted.
Store it in I'-AM, 27.

After that, in step S5, the CPU 25, I(
.

An activation signal is output to the Y-direction feed motors 17 and 22 to move the pallet 14 from the original position to a retracted position shown in FIG. 3 that does not impede replacement or inspection of the bobbin thread bobbin 75. Then, in step S6, the CPU 25 calculates the number of movement pulses of the pallet 14 from the previous stop position to the home position and the number of movement pulses from the home position to the evacuation position for each of the X direction and the Y direction, and RA as the movement amount
Store it in R427.

Therefore, in the same way as described above, the pallet 14 is moved to the retracted position and the upper front part of the thread loop catcher 6 is opened, and the hobbin case is taken out from the thread loop catcher 6 and the bobbin thread bobbin 5 can be easily replaced and inspected.

When the activation switch 30 is closed, step S
7, the CPU 25 reads out the evacuation movement amount data of RAΔ127 in step S8, and outputs an actuation signal to the seven to 17, 22 for sending in the X and Y directions based on the data in step S9. Then, Palette 14 all jJIJ l! J stop position 11
'1. In this state, step S
At step 10, it is determined whether the start switch 30 is closed again, and the sewing operation is resumed from the previous stop position by closing the switch 30 (FLOW).

Therefore, after replacing or inspecting the bobbin thread thread 5, the sewing operation is immediately resumed, which requires the troublesome operation of moving the pallet 14 from the sewing start position to the previous stop position according to the sewing pattern data and then manually feeding the pallet 14. Note that this invention is not limited to the embodiment described above; for example, the evacuation switch 31 may not be provided and a detection signal may be output from the thread remaining amount detector 33 and the thread breakage detector 7a34. It is also possible to change the configuration of the valley part as desired without departing from the spirit of the invention, such as by configuring it so that the carry run 13 and pallet 14 are immediately moved to the retreat position when .

Effects of the Invention As detailed above, this invention has the advantage that after replacing or inspecting the bobbin thread bobbin, the pallet is placed on the rack/--ISI '+:'i,
11 oil shortages in 'j! l1l) The auxiliary work associated with changing the bobbin thread bobbin and spotting, which requires the troublesome operation of feeding the bobbin thread, is completely eliminated, and the entire working time can be drastically shortened. play.

[Brief explanation of drawings]

Fig. 1 is a control circuit diagram of a sewing machine embodying the present invention, Fig. 2 is a perspective view showing the configuration of the sewing machine, and Fig. 3 is a partial perspective view of the sewing machine showing the state in which the pallet has been moved to the evacuation device. 4 are flowcharts for explaining the double-wave operation of this sewing machine, and FIGS. 5 and 6 are flowcharts for explaining the operation when replacing or inspecting the bobbin thread bobbin, respectively. In the figure, 2 is the sewing machine body, 4 is the needle, 5 is the bobbin thread bobbin,
13tI'i carry; 14 is a pallet; 16 is a work cloth; 17 is an X-direction feed motor; 22 is a Y-direction feed motor; 25 is a CPU comprising all of the first and second control means;
6 is ROAt, 27 is n −'-A which constitutes the entire storage means
□[, 41 is a driving means.

Claims (1)

[Claims] 1. The carriage (13) is moved by the operation of the drive means (41).
) on which the processing cloth (16) is stretched.
4) in a sewing machine in which the pallet (14) or the carriage (13) is moved in a desired direction across the vertical movement path of the needle (4) to perform sewing based on pattern data. A first control means (25) for controlling the operation of the drive means (41) so as to move the pallet (14) to a retracted position that does not impede exchange of the thread bobbin (5); a storage means (27) for storing the amount of movement to the evacuation position; and the drive means (41) so that the pallet (14) returns to its pre-evacuation position based on the data stored in the storage means (27). A sewing machine comprising a second control means (25) for controlling.