CN1309203A - Button-sewing machine - Google Patents

Abstract

A button sewing machine, the operating speed of the sewing machine is determined corresponding to the information related to the depth direction of the buttonhole, and the sewing machine control mechanisms 30, 31, 32, 35. This button sewing machine can sew buttons at an optimum button speed in response to button conditions such as the thickness of flat buttons and the hole depth of pin buttons, so that the operation efficiency can be improved and productivity can be improved, and needle breakage and Buckle.

Description

button sewing machine

The invention relates to a button sewing machine, in particular to a button sewing machine which is provided with a moving mechanism which makes the button move vertically relative to the needle which moves up and down.

The past button sewing machine has a clamping mechanism that clamps the button to be sewn on the sewing material and makes it move in a direction perpendicular to the needle relative to the up and down path of the needle. When the button is a flat button, Make the needle between most of the threading holes, or when the button is a snap button, make the needle needle in sequence between the threading hole of the handle and the outside of the handle, so that the button held by the button clamping mechanism move.

And, for example, as shown in Japanese Patent Laid-Open Publication No. 8-71273, after carrying out the buttoning process of sewing the button on the sewing material, it is to use a suture to tie a knot around the button for reinforcement. The so-called root winding process, in such a button sewing machine, in order to improve the operating efficiency of the machine, a button sewing machine that performs button sewing at different sewing speeds in the button sewing process and the root winding process has been known. Know.

However, usually, the button holding mechanism starts to move the button when the needle is pulled out above the threading hole of the button so that the next threading hole or the outside of the shank faces the needle. Set to a constant speed when making buttons.

If the speed of this sewing machine is set at a low speed, when the flat button being sewn is thicker or the shank of the snap button is wider, only for this deepened button threading hole, the needle's rising speed is relatively slow, so the needle point from The buckle clamping mechanism starts to move before the threading hole comes out, and there is a danger of the needle tip colliding with the buckle.

Therefore, if the speed of the sewing machine is set to a high speed, when the flat button being sewn is thin or the shank of the pin button is narrow, the button clamping mechanism moving at a certain speed will start the next needle before the end of the movement. Descending, there is also the danger of the needle point colliding with the button.

That is, due to conditions such as the thickness of the flat button (the depth of the threading hole) and the depth of the pin button threading hole, the optimum running speed cannot be set, so the problem of broken needles or damaged buttons has occurred. Moreover, when the operation speed is very low corresponding to the condition of the button, the stand-by time of the button clamping mechanism is long, the operation efficiency of the machine is not good, and there is no problem of superior productivity for the button sewing and root winding processes.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a button sewing machine. This button sewing machine is suitable for button conditions such as the thickness of the flat button and the hole depth of the snap button, and can perform button sewing at an optimum sewing speed to improve operational efficiency and improve productivity, while preventing needle breakage and button damage .

Moreover, another object of the present invention is to provide a button sewing machine, which can pass the optimal button and button according to button conditions such as the thickness of the flat button (the depth of the threading hole) and the depth of the hole of the pin button. The moving time point of the sewing material can improve the operation efficiency and thus increase the productivity, and at the same time prevent broken needles and damaged buttons.

In order to achieve the above object, the button sewing machine according to the first aspect of the present invention is characterized in that it is provided with information corresponding to the information related to the depth direction of the buttonhole to determine the operating speed of the sewing machine, and at the same time control the driving of the motor of the sewing machine according to the determined operating speed. Control device for operating the sewing machine (travel time data table, operation speed table, ROM31, CPU30).

By adopting this structure, since the button can be fastened at an optimum sewing speed according to the conditions related to the depth direction of the button hole, such as the thickness of the flat button and the hole depth of the pin button, it is possible to improve the operation efficiency and thus improve the productivity. At the same time, it can prevent broken needles and buckles.

The button sewing machine of the second invention is the button sewing machine of the first invention, provided with a movement start time point determination device (needle) that determines the time point of the movement start of the moving device based on the information related to the depth direction of the buttonhole. Position detection device 41, encoder device 42, movement start phase table ROM43, CPU44), the control device of the sewing machine starts to drive the moving device at the determined movement start time point.

According to this structure, since the button can be moved at an optimal timing according to the thickness (hole depth) of the button, it is possible to further effectively prevent needle breakage and button damage.

Hereinafter, a brief description will be given of the drawings and their reference numerals.

Fig. 1 is a block diagram of Embodiment 1 among the embodiments of the button sewing machine of the present invention.

Fig. 2 is a schematic diagram of the operation panel in the embodiment of the button sewing machine of the present invention.

Fig. 3 is a state diagram of sewing flat buttons in the embodiment of the button sewing machine of the present invention.

Fig. 4 is a state diagram of sewing pin buttons in the embodiment of the button sewing machine of the present invention.

Fig. 5 is a flow chart of button sewing in Example 1 of the button sewing machine of the present invention.

Fig. 6 is a block diagram of Embodiment 2 among the embodiments of the button sewing machine of the present invention.

Fig. 7 is a flow chart of button sewing in Example 2 of the button sewing machine of the present invention.

Fig. 8 is a block diagram of an example of a control circuit used in a conventional button sewing machine.

Fig. 9 is a flow chart of button sewing by a conventional button sewing machine.

Fig. 10 is an explanatory view showing the ratio of the relationship between the thickness of the button (button hole depth) and the movement of the needle when the flat button of Example 1 is sewn.

Fig. 11 is an explanatory diagram showing the ratio of the relationship between the thickness of the shank (the depth of the buttonhole) and the operation of the needle when the pin button of Example 1 is sewn.

Fig. 12 is the flow chart of implementing the sewing B subroutine in embodiment 2.

Fig. 13 is the running speed data table of the present invention.

Fig. 14 is a data table of the movement start phase of the present invention.

In the figure: 14, 40-button sewing machine, 15-sewing machine motor, 18-input setting device, 30, 44-CPU, 31, 43-ROM, 32-RAM, 35-sewing machine motor control device, 36-button clip holding mechanism control device.

Example

Hereinafter, Embodiment 1 will be described with reference to FIGS. 1 to 4 .

In the button sewing machine of the present invention not shown, the upper shaft of the sewing machine is connected with the sewing machine motor 15 in Fig. 1 .

On the other end of the upper shaft, there is provided with a machine needle that moves up and down relative to the sewing material with the rotation of the upper shaft, and performs buttoning and root winding on the sewing material on the cloth table not shown in the figure.

And, be provided with the buckle holding mechanism that clamps button and move not shown in the below of described machine needle, this button holding mechanism is moved by driving motor 17 shown in Fig. 1, the button that will be clamped in Move in the vertical direction relative to the up and down movement direction of the needle. Therefore, the movement means is constituted by the buckle holding mechanism and the drive motor 17 .

As shown in FIG. 1, the button sewing machine 14 of the first embodiment has an input setting device 18 for setting necessary conditions for sewing buttons.

On the input setting device 18, it is possible to input the selection of button types such as 2-hole flat buttons and 4-hole flat buttons and pin buttons, and the type of sewing stitches between the buttonholes, and the length and width of buttons, and Information about the length in the direction of the buttonhole depth related to the thickness of the flat button (the depth of the threading hole) and the depth of the threading hole of the snap button. This input can be performed, for example, through the operation panel 19 shown in FIG. 2 or a switch, external communication, or the like. Setting items 20 for setting sewing conditions are displayed on the diagram of the operation panel 19 . Moreover, as the setting content, the type 21 of the button to be sewn is displayed in an image, and at the same time, when the button is a flat button, the button thickness 22, or when the button is a snap button, the thickness of the shank, that is, the depth of the threading hole , expressed numerically.

Further, the operation panel 19 is provided with up and down movement buttons 23 a and b for selecting a setting item 20 , a confirmation button 24 for confirming the setting, and a cancel button 25 for canceling the setting. Moreover, buttons 26 for changing the set button thickness 22 and hole depth are also provided on the shown operation panel 19 , and the set values are increased or decreased by the buttons 26 .

Furthermore, the button sewing machine 14 has a start pedal 28 that can give an instruction to start sewing, and the button sewing machine 14 starts to be driven when the user steps on the start pedal 28 . However, it is also possible to use, for example, a switch to indicate the start of sewing instead of the starting pedal 28 .

The input setting device 18 and the starting pedal 28 are respectively connected to an input device (interface) 29 shown in FIG. 1 . A CPU 30 constituting a part of the sewing machine control device is connected to the input device 29 for inputting signals output from the respective devices 18 and 28 to the CPU 30 .

The CPU 30 is connected to a ROM 31 and a RAM 32 constituting a part of the sewing machine control device.

The used moving time data table in the ROM31 stores, for example, the vertical and horizontal length from the hole to the hole when the needle is dropped in the case of a flat button, and the length between the hole and the needle drop outside the handle in the case of a pin button. The movement time data used by the buckle clamping mechanism per one stitch. The CPU 30, corresponding to the button information (for example, button type, sewing type, vertical and horizontal spacing, etc.) input from the input setting device 18, selects the used moving time data from the used moving time data table, so as to determine the buckle clamping mechanism. The travel time used for . The moving time used in this data sheet means that the longer the stitch length is, the longer the moving time per stitch will be.

Furthermore, in the ROM 31, the upper shaft rotation speed data V corresponding to the ratio of the used moving time L, flat button thickness and pin button hole depth (distance in the button hole depth direction) is represented in the rotation speed data table (Figure 13) form storage.

In this rotation speed data table, when the movement time for each stitch is constant, the rotation speed of the upper shaft decreases as the thickness of the button or the depth of the hole increases. Furthermore, when the thickness of the button is constant, the longer the movement time for the button holding mechanism per one stitch, the slower the rotation speed of the upper shaft.

That is, for buttons with short hole-to-hole spacing and thin thickness, the rotation speed of the upper shaft is the fastest, while for thick buttons with long hole-to-hole spacing, the rotation speed of the upper shaft is the slowest.

An output device (interface) 33 is connected to the CPU 30, and the output control signal output from the CPU 30 is output to the sewing machine motor 15 and the driving motor 17 through the sewing machine motor control device 35 and the button clamping mechanism control device 36.

The sewing machine motor control device 35 as a drive motor driver drives or stops the sewing machine motor 15 according to the operating speed of the sewing machine determined by the CPU 30 .

The buckle holding mechanism control device 36 as a drive motor driver is controlled by the CPU 30 to drive the drive motor 17 at a constant speed within a predetermined period of time.

And the needle position detection device 41 that respectively sends out the upper position signal or the lower position signal when the needle is in the up and down position is provided on the upper shaft of the sewing machine, and is input to the CPU 30 through the input device 29 . The upper position signal or the lower position signal is counted during sewing, and the sewing machine is stopped when the set number of stitches is reached.

Next, with reference to FIG. 5, the operation of the first embodiment in which the CPU 30 is used to control will be described.

First, when a signal for setting a sewing condition is input by key operation on the operation panel 19 shown in FIG. 2, condition setting starts (step S1). In steps S2 to 4, the type of button is selected, the type of sewing is selected, and the distance between buttons is set in sequence. The setting of the button spacing, for example, as shown in Figure 3, when there is a flat button HB with 4 holes H1-H4, for adjacent holes, such as the center distance of holes H1 and H2, as shown in Figure 2 Set the distance between the centers of the 2 holes for a 2-hole buckle, and the distance from the center of the threading hole to the outside of the handle for a pin buckle, and set their vertical and horizontal distances respectively.

Then, when the button is a 4-hole flat button (step S5), if the sewing type is when H1 and H3 among Fig. 3 and H2 and H4 needles are crossed (X type) type stitches (step S6), The long-side distance of the triangle is required to obtain the stitch length, that is, the pitch (step S7).

When button is snap button (step S5) or in Fig. 3 hole H1 and H2, H3 and H4 needle up and down when sewing parallel stitches (step S6), the vertical and horizontal distance of setting is as spacing.

Based on these settings, in (step S8), the required travel time of the buckle holding mechanism is determined using the used travel time data table in the ROM 31.

That is, in the used movement time data table, there is stored the time required for the buttons held by the button holding mechanism to move at the pitches set in steps S5-7. For example, the flat button HB in Fig. 10, the center-to-center distance L of the buttonholes Ha, Hb is equivalent to the pitch, and the required moving time when moving this distance L at a certain speed (the highest speed) is read out.

Then, when the button is a flat button, input the set value of the thickness of the button, and when the button is a snap button, input the set value of the hole depth (step S9).

After the setting, in steps S10 to S11, the operating speed of the upper shaft is determined from the data in the operating speed data table in the ROM 31 .

That is, as shown in Figure 10, in each up and down motion cycle of the machine needle ND, the button can only move when the machine needle ND rises above the button. The half-period that the machine needle is positioned at the top of the needle plate is 50%, and the ratios of 40%, 30%, 20%, 10%, and 0% can be set corresponding to the thickness (buttonhole depth) of the button HB set (step S10 ). That is, the greater the thickness of the button, the shorter the time for the button clamping mechanism to move.

If it is a snap button, as shown in Figure 11, when the distance between the threading hole MH formed on the handle MB1 and the outer needle ND of the handle MB1 is L, it corresponds to the height of the handle MB1, that is, the threading hole Depth setting ratio for MH.

Based on the used moving time T read from the desired moving time data table based on this ratio and the above-mentioned ratio, the sewing machine operating speed at which the buttons do not collide with the needles is read from the operating speed data table (step S11).

Then, when the starting instruction is given by the starting pedal 28 (step S12 ), the starting instruction is input into the CPU 30 through the input device 29 . Sewing starts after receiving this instruction.

In this subroutine for performing sewing, except for the above-mentioned control of the operating speed of the upper shaft (operating speed of the sewing machine), the operation sequence (operation content) of each device is the same as that of the conventional example.

That is, the CPU 30 outputs an operation command and a speed command to the sewing machine motor control device 35 through the output device 33 after receiving the start instruction.

After receiving this instruction, the sewing machine motor control device 35 drives the sewing machine motor 15. At this time, the button clamping mechanism moves the button according to the set desired moving time, and the upper shaft operates at the set speed. speed running.

In this way, when the flat button HB shown in Fig. 3 is sewn, corresponding to the thickness of the flat button HB, the needle ND is reliably released from the buttonholes H1-H4, and the button clamping mechanism moves, and at the same time, the needle ND penetrates In the moved buttonholes H1 to H4, buttoning is performed at the optimum operating speed.

Furthermore, when the pin button MB shown in FIG. 4 is sewn, after the needle ND is reliably released from the hole Hm corresponding to the hole depth of the pin buckle MB, or the buckle holding mechanism is moved for needle penetration, to Fasten at the optimum operating speed.

Then, when the counting of the upper position signal and the lower position signal by the position detection device detects that the sewing of the predetermined number of stitches has been completed, the sewing is ended.

Therefore, according to the first embodiment, since the information in the direction of the hole depth formed on the button, such as the thickness of the flat button and the hole depth of the pin button, can be set, it is possible to obtain the optimum sewing machine operation corresponding to the set value. speed. Therefore, the productivity can be improved through the high efficiency of the operation cycle.

Moreover, since the optimum sewing machine running speed can be set corresponding to the buttons, it is possible to prevent the needles passing through the holes from being broken due to too fast running speeds, or the needles from being damaged by the buttons.

Next, Embodiment 2 of the button sewing machine of the present invention will be described with reference to FIGS. 6 and 7 . In addition, the same or similar parts as the basic structure of the button sewing machine 14 in the first embodiment will be described with the same reference numerals.

In the second embodiment, the encoder 42 provided on the upper shaft sends out a predetermined number of pulse signals (clock signals) for one rotation of the upper shaft.

And, in the ROM43 (Fig. 6) among the present embodiment 2, have stored the used movement time data in the described movement time data table and the operation speed data in the described operation speed data table, simultaneously the thickness of the flat buckle and the marble pin The button hole depth etc. (the ratio) and the button clamp mechanism movement start phase data corresponding to the sewing machine operating speed V are stored in the movement start phase data table.

The movement start phase data table is shown in FIG. 14, corresponding to the ratio set in step S10 and the sewing machine operation speed data V set, and the movement start phase is used as the pulse signal (clock signal) of the encoder 42. The pulse number P is stored. For example, if the upper position signal is sent from the needle position detection device 41, when the ratio is 40%, it is read from the movement start position data table that the needle rises from the time the needle position detection signal is sent out. Data corresponding to the number of pulses at the 40% position.

CPU44 (FIG. 6) is the same as above, determines the used travel time data from the used travel time data table, determines the operation speed data from the operation speed data table, and corresponds to the button thickness input from the setting input device 18 at the same time. and button information such as hole depth, select the movement start phase data from the movement start phase data table, so as to determine the movement start time point of the buckle clamping mechanism.

Next, the operation of the second embodiment controlled by the CPU 44 will be described.

As shown in FIG. 7 , steps S21 to 31 are the same as steps S1 to 11 in step S of the first embodiment.

After the respective settings in steps S21 to 31 are performed, in step S32, the buckle grip mechanism movement start phase angle is determined from the movement start phase data table in the ROM 43 . That is, the data of the number of pulses corresponding to the phase angle is read and set.

Then, in step S33, when the start instruction is given by the start pedal 28, the start instruction is input to the CPU 44 through the input device 29, and the subroutine for performing sewing B in step S34 is executed.

This subroutine, as shown in Figure 12, starts the sewing machine after receiving the start instruction (step S35), and the CPU 44 outputs a running command and a speed command to the sewing machine motor control device 35 through the output device 33.

The sewing machine starts to run, and after receiving the upper position signal sent from the needle position detecting device 41 (step S36), the CPU 44 counts (p+1) the pulse signal sent by the encoder device 42 in step S37.

Then, when the count value p reaches a predetermined P value corresponding to the movement start phase angle (step S38), an instruction is received from the CPU 44, and the buckle clamping mechanism control device 36 drives the buckle clamping mechanism (step S39) .

Then, in steps S40-42, when detecting that the sewing of the predetermined number of stitches has been completed, the sewing machine is stopped to end sewing, and when not finished, the operations after (step S36) are repeated.

Therefore, according to the second embodiment, in addition to shortening the production cycle and improving operability, the button can also be moved at an optimum timing consistent with the operating speed of the sewing machine. Therefore, it is possible to more effectively prevent the needle from being broken and the button to be damaged, and the button sewing can be performed more accurately.

In addition, this invention is not limited to the said Example, Various changes are possible as needed.

For example, in the above-mentioned embodiment 1 and embodiment 2, although the thickness of the flat buckle and the hole depth of the pin buckle are set from the outside, it is not limited to this, for example, the data detected by the automatic detection device can also be used A method to replace setting data. Moreover, in the first and second embodiments, although the running speed of the upper shaft is determined by using the running speed data table, it is not limited to this, for example, it can also be determined according to the depth direction of the button hole. information to determine the operating angle of the upper shaft that can move the button without the machine needle touching the button, and calculate the operating speed of the upper shaft from the determined operating angle and the used moving time.

And, although start to output encoder signal according to the upper position signal of machine needle position detection device 41, also can detect other signal except upper position, at that time, also can be provided with other machine needle position detection devices.

Moreover, although the output signal of the encoder provided on the upper shaft is used as the clock signal, it is also possible to arrange the encoder on the motor shaft of the sewing machine, or to use the internal clock signal of the CPU. At this time, the set number of pulses may be changed according to the set operating speed.

As described above, according to the button sewing machine according to the first aspect of the present invention, it is possible to improve the operation efficiency and thus the productivity, and at the same time, it is possible to prevent needle breakage and button damage, and to perform accurate button sewing.

According to the button sewing machine of the present invention 2, on the basis of the effect according to the 1 of the present invention, it can further effectively prevent needle breakage and button damage.

Claims (2)

1. A button sewing machine is provided with a needle which is driven by a sewing machine motor to reciprocate to nail a button with a hole for sewing to a sewing material, and to make the button in a direction perpendicular to the needle The moving device is characterized in that it determines the operating speed of the sewing machine corresponding to the information related to the depth direction of the button hole, and at the same time controls the drive of the sewing machine motor in order to operate the sewing machine according to the determined operating speed. control device. 2. The button sewing machine according to claim 1, characterized in that, it is provided with a determination device for determining the movement start time point of the movement start time point of the moving device according to the information related to the depth direction of the button hole; The control device of the sewing machine starts driving the moving device at the determined movement start time point.

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