JP3497859B1 - Tatami sewing device - Google Patents

Abstract

To provide a tatami sewing apparatus capable of easily switching between staggered sewing and ladder sewing. SOLUTION: When staggered stitching is selected by a sewing changeover switch 179, staggered stitching can be executed under the control of a control device 181. When ladder stitching is selected, ladder stitching can be executed. Therefore, the zigzag stitching and the ladder stitching can be switched only by switching with the sewing changeover switch 179, so that the zigzag stitching can be switched to the ladder stitching without troublesome replacement of mechanical parts such as cams and remodeling. It is possible to easily switch between sewing and sewing.

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD OF THE INVENTIONThe present invention
Tatami that performs flat sewn stitching, tilts the tatami and performs reverse stitching
The present invention relates to a sewing device. 2. Description of the Related Art Conventionally, when manufacturing tatami mats,
When sewing a tatami table on a tatami floor, the length of the tatami table covered on the tatami floor
Bend both ends in the hand direction to the tatami floor, the short side of the tatami floor
On the tatami floor, sew the tatami mat on the tatami floor
So-called frame stitching is performed. Also, on the long side of the tatami mat
In addition, it was sewn to the edge of the tatami surface by flat sew
Folded the edge (edge) to the side of the tatami floor,
So-called reverse stitching, which sewes the edge to the side of the tatami floor, is performed.
You. In addition, in the case of tatami without border like tatami mat for judo hall
, Do not stab, and tie the long side of the tatami mat to the side of the tatami floor.
Bend to the side and sew the folded tatami mat on the side of the tatami floor
Attaching is performed. [0002] In the above, the reverse sewing of the edgeIAnd of the borderless tatami
In caseTatami matLong sideTatami floorWhen sewing on the side of
Is commonly used as a staggered stitch.
In addition, when performing the above-mentioned frame stitching, generally, ladder stitching and
A called sewing method is used. This flat sew or reverse stitch
Attempts to perform sewing with a single device have been proposed.
I have. Japanese Patent Publication No. 40-2108publicAnd the Japanese Patent Publication No. 58-31949public
The report includes a mechanism that performs stitching and zigzag stitching for reverse stitching.
Are described as one. This Misi
When traveling along a tatami mat held horizontally,
Switching the drive, for example, stabbed on the outbound trip,
Reverse sewing can be performed. Also, No. 46-5900publicInformation
Then, connect the flat stitch sewing machine and the reverse stitch sewing machine
Finish the stab and reverse stitching of the tatami edge in the process where they advance
It is configured as follows. Also, Japanese Patent Publication No. 60-36088publicInformation, actual
No.42-768publicThe tatami table on which the tatami mat is placed during sewing
To be horizontal when piercing,
Staggered stitching with the tatami mat on the side not to be sewn inclined down
There is described a tatami sewing apparatus for performing reverse stitching.
Tatami sewing device that performs such flat stitching and reverse stitching with one unit,
One-needle stitching and reverse stitching can be performed.
In the tatami industry, it is called a dual-purpose machine,
No need to install two machines, one machine for flat sew
It can do stitching and reverse stitching, conspiring to save space.
Is possible,TargetMost commonly used
It is. All of these conventional sewing machines are
Only staggered sewing can be performed
You. [0003] Here, first, staggered sewing
Will be described with reference to FIG. This FIG.
This explains how to sew birds. (A) is the side of tatami 40
Figure 101a shows a staggered seam pattern in 101a, (b)
Shows a perspective view of the side surface 101a portion of the forty viewed from the back surface 101b side
I have. The figure13In tatami floors and tatami mats are distinguished
Not in. [0004] Staggered sewing is performed as follows. Ma
The sewing needle (not shown) through the upper thread 102
From the position P1 at a predetermined height in 101a, the back surface 101b of the tatami mat 40
Pierce the side diagonally, and then return the sewing needle to the original position P1.
(See the dotted line in (b)).
Accordingly, the upper thread 102 and the lower thread are provided on the back surface 101b side of the tatami mat 40.
A hooking portion A1 entangled with 103 is formed. And figure
The sewing machine body not shownArrow A along side 101a of Tatami 40
While moving the sewing needleBelow the side 101a of the tatami mat 40
Reciprocating once, and then perform the sewing operation from one time. This
Accordingly, the upper thread 102 and the lower thread are formed on the back surface 101b of the tatami mat 40.
103 is formed. After this, tatami 40
At the position P2 (the same height as the position P1) on the side surface 101a
The sewing needle back and forth again to perform one sewing operation.
U. Along with this, the upper thread 102 and
A hooking portion A3 entangled with the lower thread 103 is formed. to this
The two oblique holding portions 104a, 104
b forms a V-shaped seam. Such behavior
By repeating the above, on the side 101a of the tatami 40, the upper thread
102 moves in the direction of arrow A, which is the sewing advance direction of the sewing machine body.
Zigzag up and down as you go, staggered sewing
It is. Next, ladder sewing will be described with reference to FIG.
explain. FIG. 11 is a view for explaining how to perform ladder stitching.
(A) is a ladder stitch on the side 101a of the tatami mat 40
(B) shows the side 101a of the tatami mat 40
Is a perspective view as viewed from the 101b side. Note that FIG.
No distinction is made between tatami floors and tatami mats. [0006] Ladder sewing is performed as follows. Ma
The sewing needle (not shown) through the upper thread 102
From the predetermined height position P1 in 101a to the back surface 101b side of the tatami mat 40
And then return the sewing needle to its original position P1
That is, the first sewing operation is performed. Along with this, 40 tatami mats
A hook that entangles the upper thread 102 and the lower thread 103 on the back surface 101b side
A portion B1 is formed. Next, put the sewing needle on the side 10
1a Reciprocate once below and perform one empty stitching operation.
U. Along with this, the upper thread 102
A hook B2 entangled with the yarn 103 is formed. After this,
At the original position P1, the sewing needle is reciprocated to
Perform the sewing operation. Along with this, on the back 101b side of the tatami 40
A hook B3 is formed in which the upper thread 102 and the lower thread 103 are entangled.
It is. Thereby, on the side surface 101a of the tatami mat 40, on the ridge line 1c of the tatami mat 40
Two fastening portions 105 perpendicular to the direction are formed. Next
Then, move the sewing machine body in the direction of arrow A along the side 101a of the tatami mat 40.
The tatami mat 40 is moved to a position P2 (position P1) on the side surface 101a.
At the same height as the sewing needle).
The eye is sewn (refer to the hook B4). This
Pressing section 106 parallel to ridgeline 1c is formed on side 1a of tatami mat 1.
Is done. By repeating such operations, the tatami mat 40
On the side surface 101a of the sewing machine, the upper thread 102
A ladder that is shaped like a ladder toward the direction of arrow a
Sewing is performed. The ladder stitch looks beautiful like this
The holding after sewing is relatively easy compared to staggered sewing
And especially of the borderless tatami matIn the case of tatami matsLong side
Tatami floorLadder stitching compared to staggered stitching
Is better. In other words, in the case of a tatami without a border,
Thick things likeTatami floorFolded on the side, folded
When the table is sewn to the side of the tatami floor, the restorative force of the tatami table is large.
Because thisTatami floorLadder stitching for close contact with the side
Is most suitable. [0007] Also, in recent homes, the Japanese sky
In particular, the demand for borderless tatami mats has increased,
In tatami mats with and without borders are mixed,
In a single machine, both staggered stitching and ladder stitching
There is a demand for an amphibious machine that can do this. However,
Conventionally, as a tatami sewing device, a staggered sewing device is used.
For this purpose, a staggered machine or a two-purpose machine is used, and ladder sewing is used.
Or a ladder sewing machine is used. In this case,
Ladder stitching can be performed with a stitching machine dedicated to staggered stitching or a dual-purpose machine.
To change the mechanical parts such as cams.
It is possible to remodel by replacing, but
It is very cumbersome to do. Also, stagger again
In order to switch to a
It is necessary to replace and modify mechanical parts. The present invention has been made in view of the above circumstances.
The purpose is reverse stitching and zigzag stitching.
A dual-purpose machine that can easily switch between ladder sewing and
To provide. [0009] The above object is achieved.
For this reason, the invention according to claim 1 is to lay the tatami in a horizontal state,
Tatami stitching device that performs reverse stitching by tilting the tatami
In the tatamiThe long sideSewing machine installed movably along
A main body, a feed mechanism for moving the sewing machine main body,
Needle motor provided on the sewing machine main body and rotation of the needle motor
A staggered cam that is rotated based on rolling,This staggered cam
Needle motor rotationDrive clutch means for limiting transmission,Previous
It is provided on the sewing machine main body, and according to the rotation of the staggered cam,
Sewing machine moved periodically between upper and lower positions
To the sewing machine arm according to the rotation of the needle motor.
The sewing machine is provided so as to reciprocate and holds the upper thread.
With the reciprocating motion when the arm is at the above position
Insert the upper thread from the side surface of the tatami mat to the lower surface side, and
Performs a sewing operation to entangle with the lower thread in the sewing machine
The reciprocating motion when the
Performs empty stitching operation in which the upper thread is tangled with the lower thread on the lower side of the tatami
Sewing needle and saidBased on the rotation of the needle motorPeriodic signals
OutputSelective cutting of sensor, staggered stitching and ladder stitching
Switching means for changing,Controlling the needle motor,
SaidSwitching means, the feeder based on a signal from a sensorCompositionAnd
Drive clutch meansCalculate and execute the operation time and operation period of
LetControl means, wherein the control means includes
If zigzag stitching is selected by step,The needle motor
And the drive clutch means in the operating state,
The sewing needle reciprocates while the sewing machine is in the upper position.
After performing one stitching operation, the sewing machine arm
Move from the upper position to the upper position again via the lower position, and
While the needle is reciprocating and performing one empty sewing operation,
The feed mechanism is operated based on the sensor signal and the sewing is performed.
Move the machine body in the sewing advance direction, and
Operation of the feed mechanism is stopped based on the
When the sewing machine arm is at the upper position,
Repeat that the needle performs one sewing operationStaggered sewing
Ladder sewing is selected by the switching means.
IfOperate the needle motor and drive clutch means
State and the sewing machine arm is located at the upper position.
The sewing needle reciprocated and performed the first sewing operation
Thereafter, the sewing machine arm is re-started from the upper position through the lower position.
The sewing needle reciprocates while moving to the upper position
Performs an empty stitching operation, after which the sewing machine arm is
The sewing needle moves back and forth in the
The sewing operation is performed, and during this time, based on the signal of the sensor,
The drive clutch means is temporarily disengaged and the sewing machine
With the sensor in the upper position,
The sewing machine is operated by operating the feed mechanism based on the signal of
The body is moved a predetermined distance in the sewing advance direction, and thereafter the
With the thin arm positioned at the upper position, the sewing needle is
Repeat the first sewing operation by reciprocating
do itTo perform ladder stitchingFeature. [0010] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIGS. First, flat sew and return
A tatami mat 40 is placed on a dual-purpose machine that performs sewing with one sewing needle.
A pair of rails 113a along the longitudinal direction of the tatami
113b is provided, and the sewing machine main body 15 is
It is provided so as to be able to reciprocate along 3a and 113b. this
The sewing machine is provided with a servo provided at a lower portion of the sewing machine main body 15.
Feeder using a feed motor 115 consisting of a motor as a drive source
The structure 116 is adapted to be moved. Feed mechanism 116
Although not shown in detail, sprockets and chips
It has a well-known structure using a chain. The structure of the sewing machine main body 15 is also shown in FIGS.
It will be described with reference to FIG. The lower part of the sewing machine body 15 is shown in FIG.
A needle motor 66 is also provided. This needle motor 66
Sprocket 120 attached to the rotating shaft 69a of the
The handle shaft 64, which is rotatably mounted on the 15 frames,
A chain 124 is hung between the sprocket 123
The rotation of the needle motor 66 is
This is transmitted to the handle 64. Needle motor 66
The rotation direction is the R direction shown in FIG. The handle shaft 64 is
Penetrate this through the bearing into the frame of the sewing machine body 15
It has a circular handle 125 at the end.
Is attached. The handle shaft 64 is partially formed as shown in FIG.
Minute spline processing, this part has a drive transmission
The clutch 71 is mounted movably in the S direction in FIG.
You. In the vicinity of the drive transmission clutch 71, a clutch operation serial
A cylinder 70 is provided.
The tip of the pad 70a is connected to the drive transmission clutch 71 via 70b.
The drive transmission clutch 71 is
The drive gear 61 and the drive transmission clutch 71 are
Only in one position each otherMeshIt is possible,
Needle movement and sewing arm operation timing
It has a configuration. The drive transmission clutch 71 is
It is configured to be movable in the S direction on the axis 64. A handle shaft is provided on the frame of the sewing machine body 15.
64 near the handle shaft 22 and the cam
The shaft 63 is provided rotatably. Provided on handle shaft 64
Drive gear 61, and a driven gear 62 provided on a cam shaft 63.
And the handle shaft 64 rotates with both gears 61
It is transmitted to a cam shaft 63 via 62. or,
The staggered cam 13 is integrally attached to the driven gear 62.
Have been. The number of teeth of the driven gear 62 is twice the number of teeth of the drive gear 61
When the drive gear 61 makes two rotations, the driven gear 62
It is configured to make one rotation. On the handle shaft 64,
The thin feed cam 129 rotates integrally with the handle shaft 64
It is installed so that it does. In the vicinity of this feed cam 129
Is a feed that turns on / off in response to the cam shape of the feed cam.
A sensor 130 is provided. The frame of the sewing machine main body 15 has a staggered cam 13
The zigzag lever 5 located in the vicinity of is rotated about the fulcrum 5a
Mounted as possible. This staggered lever 5
The roller 7 that transmits along the outer circumference of the bird cam 13 is
The staggered lever 5 is attached to the spring member 73 (see FIG. 3).
In the direction where the roller 7 contacts the outer periphery of the staggered cam 13
Being energized. The shape of the staggered cam 13 is almost fan-shaped
I have. In the staggered lever 5, the roller 7 projects the staggered cam 13
In the state of contact with the large-volume portion, the first position shown in FIG.
Roller 7 has a small amount of protrusion of the staggered cam 13
When in contact with the part, it is located in the second position shown in FIG.
It is to be. Therefore, the staggered lever 5 is
Pivoted (moved) between the first position and the second position by the
). The other end of the staggered lever 5 is
To drive the sewing machine arm 1 based on the rotation of the bird lever 5
Lever rod 65 is rotatably connected to the sewing machine arm 1.
Have been. Here, the zigzag cam 13 makes use of the zigzag lever.
--5 is in the state of being rotated to the first position and the sewing machine arm
1 is the lower position shown in FIG. With the rotation of the staggered cam 13,
So that the staggered lever 5 rotates from the first position to the second position
, The sewing machine arm 1 pivots on the sewing machine arm shaft 14
Rotate in the direction of arrow S4 to move it to the upper position shown in FIG.
It will be like. Provided rotatably on the frame of the sewing machine body 15
The inside of the sewing machine body 15 of the handle shaft 64
Needle crank 60 is integrated with handle shaft 64 as shown
It is mounted to rotate. At the other end of the needle crank 60
Is connected to one end of the crank rod 56 so as to be rotatable.
The other end of the crank rod 56 is
It is rotatably connected to the side surface. End of needle bar lever 55
Is rotatably mounted around the needle bar lever fulcrum 55a.
Has been damaged. The other end of the needle bar lever 55 is a needle bar link.
The other end of the needle bar link 54 is connected to the needle bar
It is rotatably connected to the end of the holding body 53. Needle bar hugging 53
The needle bar 51 penetrates, and these are integrally connected.
You. Needle bar meta that serves as a guide for needle bar 51 on the sewing machine arm
Needles 52a and 52b are attached to the upper and lower
The needle bar 51 penetrates through 52b and is mounted so that it can slide up and down.
You. At the lower end of the needle bar 51 penetrating the needle bar metal 52a / 52b
Has a sewing needle 2 attached thereto. The needle 2 has a needle thread
Has been passed. Here, the rotation of the needle motor 66 is shown in FIG.
Sprocket 120, chain 124, sprocket
This handle shaft is transmitted to handle shaft 64 via 123
Rotation is transmitted to the crank 60 shown in FIG.
The rotation of the link 66 causes the crank rod 56 and the needle bar lever 55 to rotate.
And the needle bar 51 and the sewing machine via the needle bar link 54 and the needle bar holder 53.
The needle 2 is reciprocated up and down. these
The mechanism reciprocates the sewing needle 2 based on the rotation of the needle motor 66.
The needle driving mechanism 173 is configured. On the other hand, hook drive large gear
8 is from a sprocket attached to the handle shaft 64
The drive is transmitted by the chain and the hook drive small gear 9 rotates.
Transmission, spline shaft 10, shuttle drive bearing 11, Univer
The hook provided at the lower end of the sewing head via the monkey joint 12
Rotate clockwise. This rotation is caused by the vertical movement of the sewing needle 2.
Interlocks the upper thread and lower thread when sewing needle 2 enters the hook.
Perform the sewing operation. The control panel 178 shown in FIG.
Sewing switch 179 and power switch
Other operation switches 180 are provided. Figure 1
Indicates that the electrical configuration related to the gist of the present invention is functionally shown.
Have been. The control device 181 includes a microcomputer
Of the control means of the present invention.
You. The controller 181 includes a sewing changeover switch 179 and other
Signals from operation switch 180, feed sensor 130, etc. are input
Is done. Then, the control device 181 stores these input signals and
Based on the prepared control program, the feed motor 115
To control the handwriting motor 66 and the clutch operating cylinder 70
The function to execute staggered stitching and ladder stitching described later
Have. Next, flat sew sewing is performed by the main tatami sewing apparatus.
Will be described. When performing flat-stitching,
The tatami mat 40 is placed on the tatami mat mounting table 112, and the tatami mat
Fix with 75. Next, the edge 41 and the edge paper 42 in FIG.
On the tatami mat 40 and press the start button to stab
Start. In the case of new tatami mats,Tatami floorUnnecessary
Sewing is performed while cutting the part with a cutting device (not shown).
I can. Also, at the time of this flat sew,
Roller 7 of -5 is locked so that it does not contact the zigzag cam 13.
It is possible to perform a flat stab while the sewing machine arm 1 is fixed.
I am able to do it. Also, when performing reverse stitching,
The lock is released and reverse stitching can be performed.
ing. When performing staggered stitching with the
Will be described. When performing staggered stitching, use the sewing switch
"Staggered sewing" is selected by the switch 179. And
With the flat sewn finished, tilt the tatami table 112
You. Then, when the start switch is pressed, the sewing machine main body 15
The tatami mat 40 is advanced to the reverse sewing start position. After that,
181 moves sewing needle 2 prior to zigzag stitching.
Perform stitching not shown (sew the same place many times). this
Following stitching, zigzag stitching shown in FIG. 9 is performed. Referring to FIGS. 9 and 10, the staggered sewing is mainly described.
It will be described in the light of the above. Here, Fig. 9 explains how to perform staggered stitching.
(A) Staggered on the side 111a of the tatami mat 40
The seam pattern of the sewing is shown, and (b) shows the side 111a of the tatami mat 40.
FIG. 4 shows a perspective view of the portion viewed from the back side 111b. Also, FIG.
Is a feed sensor for staggered sewing130On / off status,
The operating state of the latch operation cylinder 70 depends on the feed motor 115.
Feed output, the operating state of sewing machine arm 1 and the
The operating state is shown. In FIG. 10, the feed sensor 13
The hatched portion of 0 is the feed cam129Feed
Sa130Indicates an area where is turned on. In addition, staggered sewing
If, feed sensor130Signal from off to on
Is input by a control device including a microcomputer.
Calculates a fixed time as the feed time and calculates the feed motor
The output is sent to 115. Clutch actuation
In the case of staggered sewing, the Linda 70 remains in operation
The drive transmission clutch 71 is a clutch portion of the drive gear 61.
Connection with the minute and the transmission of the rotation of the handle shaft 64 is always possible
State. When the feed output is being output, the feed mechanism 116
The sewing machine body 15 moves in the direction indicated by the arrow A, which is the sewing advance direction.
Moved to Sewing machine arm 1
With the swing of the staggered lever 5 being moved, the sewing machine arm
1 moves between the upper and lower positions. Sewing needle
In the operation state 2, the top dead center is
In the position farthest away from the top of the tatami mat 40
The bottom dead center means that the tip of sewing needle 2 is
It is in a state. Now, in FIG. 10, as indicated by C1, the sewing machine
When the arm 1 is at the upper position, the sewing needle 2 is reciprocated.
Let's look at it from time to time. Sewing machine arm 1 is in the upper position.
When sewing needle 2 moves in the direction of bottom dead center in the
The sewing needle 2 holding 85 moves from the side 111a of the tatami 111 to the back 111b.
It is pierced diagonally. Then, the sewing needle 2
The first sewing operation is performed
It is. Accordingly, the reciprocating stitching portion 187 (the dotted line portion in FIG. 9B)
Is formed on the back 111b side of the tatami mat 40.
The hook D1 in which the upper thread 185 and the lower thread 186 are entangled (FIG. 9)
(See (b)). Then, with the rotation of the staggered cam 13, the sewing machine
At the same time that arm 1 starts pivoting
The sensor 130 turns on (the feed signal turns on) (C2 in FIG. 10).
reference). Then, the control device 181 is controlled by the feed motor 115.
Of the sewing machine body 15 in the direction of arrow A (feeding
Output). Then, as shown by C3 in FIG.
While the arm 1 returns to the upper position via the lower position,
Reciprocatingly, one empty stitch is performed below the tatami mat 40.
Accordingly, on the back side 111b of the tatami mat 40, the upper thread 185 and the lower thread
186 is formed to form a hook D2. Sewing needle 2
When it returns to the top dead center, it starts moving toward the bottom dead center again.
Also, when the sewing machine arm 1 returns to the upper position,FeedingSensor
130The signal is calculated by the controller and sent
Stop the output, and turn the sewing machine
Stop feeding in the direction of mark A. Then, as shown in FIG.
Is in the upper position, sewing needle 2 reciprocates once again
Then, perform one sewing operation. Accompanying this, reciprocating sewing once
The part 188 is formed, and on the back surface 111b of the tatami mat 40,
A hook portion D3 is formed in which the upper thread 185 and the lower thread 186 are entangled. This
As a result, two holding parts 189a and 189 diagonally on the side 111a of the tatami mat 40
V forms a V-shaped seam. Repeating this operation
By turning back, the upper thread 185 is formed on the side surface 111a of the tatami mat 40.
Goes in the direction of arrow A, which is the direction in which the sewing of the sewing machine body 15 proceeds.
, Zigzag stitching is performed. Next, ladder stitching is performed by the main tatami stitching apparatus.
The case of performing the operation will be described. When performing ladder stitching,
Ladder sewing is selected by the sewing changeover switch 179.
Then, the tatami mat is fixed in place and the tatami mat mounting table 112 is tilted.
Let it. After that, when the start switch is pressed, the sewing device 15
Moves forward to the ladder sewing start position of the tatami 40. Then control
Prior to ladder stitching, the sewing machine 2 holds the sewing needle 2 with a stop (not shown).
Perform sewing (sew the same place many times). For this fastening
Subsequently, the ladder sewing shown in FIG. 11 is executed. This ladder stitch
Will be described mainly with reference to FIG. 11 and FIG. Here, FIG. 11 explains how to sew ladder stitches.
It is for doing. (A) on the side 101a of the tatami mat 40
The ladder stitching seam pattern is shown.
FIG. 4 shows a perspective view from the point of view b. Fig. 12 shows the ladder stitching.
ON / OFF state of the sensor 30 and clutch operation
The operation state of the cylinder 70 and the operation state of the sewing needle 2 are shown.
I have. Now, the sewing machine arm 1 is located at the upper position.
When sewing needle 2 is reciprocated one time in this state, sewing needle 2
The first sewing operation is performed by piercing the surface 101a to the side 101b.
Done. Along with this, the first reciprocating sewing part 90 (Fig. 11
(Refer to the inspection section of (b)) and the back of the tatami mat 40
Hook B1 where upper thread 102 and lower thread 103 are entangled on 111b side
(See Fig. 11 (b))Is formed. Then, the sewing machine arm 1 is moved from the upper position to the lower position.
Sewing needle 2 reciprocates once while moving to the upper position again after setting
Then, one empty sewing operation is performed below the tatami mat 40. This
Accordingly, on the back surface 101b of the tatami mat 40, the upper thread 102 and the lower thread 103
Is formed. At this time, the control device 18
1 is that the feed operation of the sewing machine main body 15 is not performed. The sewing machine arm 1 returns to the upper position, and the sewing needle 2 is
When reaching the bottom dead center, the control device 181 operates the clutch operating cylinder.
Da 70 is deactivated. (See Fig. 12.)
Clutch 71 is disengaged from the drive gear 61 and the handle shaft
The rotation of 64 is not transmitted to the drive gear 61, and the staggered cam 13 and
The dynamic gear 62 stops rotating. After that, the clutch operation
The drive transmission clutch 71 is connected to the drive gear 61.
The drive transmission clutch 71 is
If the handle shaft 64 does not rotate to the position at the bottom dead center,
It is configured not to mesh with the moving gear 61. Therefore Misi
Arm 1 remains held in the upper position. For this
Then, while the sewing machine arm 1 is held at the upper position, the sewing needle 2 is
Is reciprocated once to perform the second sewing operation.
It is. Along with this, the second reciprocating sewing part 191 is formed.
Together with the upper thread 102 and the lower thread 103 on the back surface 111b side of the tatami mat 40
An entangled hook B3 is formed. Thereby, the side of the tatami mat 40
On the surface 111a, it is perpendicular to the ridgeline 111c of the tatami mat 40
Two fastening portions 105 are formed. Then, the controller 181 turns on the feed sensor.
During this operation, the sewing machine main body 15 is moved in the direction of arrow A.
(Refer to FIG. 12) Then, the feed sensor 130 is turned off.
At the same time, the feed motor output is stopped and the sewing machine body 15 is stopped.
Sewing with the sewing machine arm 1 at the upper position.
The sewing operation is performed by reciprocating the needle 2.
You. Along with this, the first reciprocating sewing part 195 is formed again.
And the upper thread 102 and the lower thread 103 on the back surface 111b of the tatami mat 40.
Is formed. Also, the ridgeline 111c of Tatami 40
Are formed in parallel with the holding portion 106. Repeating this operation
The ladder sewing is performed by turning back. As is apparent from the above description, the claims
According to the tatami sewing device 1 described above, staggered sewing and ladder sewing can be performed.
It can be changed by selecting the switching means,
Troublesome work such as replacing and changing mechanical parts such as cams
Easy by switching between staggered and ladder stitching without having to do
Can be done.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, and is a block diagram showing an electrical configuration of a portion related to the gist of the present invention. FIG. 2 is a schematic side view of the whole. FIG. 3 is a side view showing a flat sew sewing state of the tatami sewing apparatus of the present invention. FIG. 4 is a side view showing a reverse sew state of the tatami sewing apparatus of the present invention. FIG. 5 is a reverse sewing of the tatami sewing apparatus of the present invention. FIG. 6 is a side view showing a state. FIG. 6 is a side view showing a needle driving unit of the tatami sewing device of the present invention. FIG. 7 is a front view showing a staggered driving unit of the tatami sewing device of the present invention. FIG. 9 is a side view showing a driving unit of the tatami sewing device. FIG. 9 illustrates how to perform staggered stitching. FIG. 10 (a) is a front view, and FIG. 9 (b) is a perspective view seen from the back side of the tatami. A time chart showing the sensor signals, the feed output, and the operation states of the sewing machine arm and the sewing needle at the time of the staggered stitching. [FIG. 11] It explains the ladder stitching method. Fig. 12 (b) is a perspective view of the back side of the tatami mat. [Fig. 12] A time chart showing sensor signals, feed output, and operation states of the sewing machine arm and the sewing needle during ladder stitching. [Fig. (A) is a front view, (b) is a perspective view from the back side of a tatami mat. [Description of symbols] 1 is a sewing machine arm, 2 is a sewing needle, 5 is a staggered lever, and 8 is a staggered lever. hook driving large gear 10 is spline Lee emission axis, 13 staggered cam, 15
Sewing machine body, 64 is the handle shaft, 66 is the needle motor, 70 is the clutch operating cylinder, 71 is the drive transmission clutch, 73 is the spring member, 85 is the upper thread, 86 is the lower thread , 116 is the feed mechanism, and 130 is the feed Sensor, 178 is a control panel, 179 is a changeover switch (changeover switch)
181 ) is a control device (control means).

Continuation of the front page (56) References JP-A-3-292995 (JP, A) JP-A-11-319356 (JP, A) JP-A-57-131476 (JP, A) JP-A-60-36088 (JP, A) JP-A-2002-126383 (JP, A) JP-A-2002-242412 (JP, A) JP-A-2002-292170 (JP, A) JP-A-2002-301282 (JP, A) JP-A-2002-301283 (JP, A) , A) Japanese Patent Publication 40-2108 (JP, B1) Japanese Patent Publication 57-38275 (JP, B1) Japanese Patent Publication 58-31949 (JP, B1) Japanese Patent Publication 59-238 (JP, B1) 39-33605 (JP, Y1) JP-A-42-768 (JP, Y1) JP-A-46-5900 (JP, Y1) Patent 2742881 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , (DB name) D05B 23/00 E04F 15/02

Claims (1)

(57) [Claims] [Claim 1] Placing a tatami mat in a horizontal state and performing flat sewn sewing,
A sewing machine for tatami that performs reverse stitching by inclining a tatami, a sewing machine main body movably provided along a long side of the tatami, a feed mechanism for moving the sewing machine main body, and the sewing machine. A needle motor provided on the main body, a staggered cam rotated based on the rotation of the needle motor, a drive clutch means for restricting transmission of the rotation of the needle motor to the staggered cam, and provided on the sewing machine main body; According to the rotation of the staggered cam
Sewing machine that is periodically moved between the upper and lower positions
Arm and the sewing machine arm reciprocate according to the rotation of the needle motor.
The sewing machine arm holding the upper thread
Is reciprocating when is in the above position,
Insert the thread from the side of the tatami mat to the underside,
Sewing operation to entangle with the lower thread
The upper thread is reciprocated when it is in the lower position.
A sewing needle that performs an empty stitching operation in which the lower thread is entangled with the lower thread
A sensor that periodically outputs a signal based on the rotation of the needle motor, switching means for selectively switching between staggered sewing and ladder sewing, and controlling the needle motor , of the feeder 構及 beauty driving clutch means on the basis of the signal of the sensor
Operation time, and control means for executing by calculating the operation period, the control unit, when zigzag stitch is selected by the switching means, prior
Activate the handwriting motor and drive clutch means,
With the sewing arm in the upper position, the sewing needle
Performs one sewing operation by reciprocating,
The arm moves from the upper position to the upper position again via the lower position.
And while the sewing needle reciprocates and performs one empty sewing operation.
Operating the feed mechanism based on the signal of the sensor.
Move the sewing machine body in the sewing advance direction
Stop the operation of the feed mechanism based on the next signal of the
After this, the state where the sewing machine arm is located at the upper position
Repeats that the sewing needle performs one sewing operation.
To execute the zigzag stitch and, when the ladder stitch is selected by the switching means, prior
Activate the handwriting motor and drive clutch means,
With the sewing arm in the upper position, the sewing needle
After reciprocating and performing the first sewing operation,
The arm moves from the above position to the upper position again via the lower position
The sewing needle reciprocates and performs one empty sewing operation.
After this, the sewing machine arm is located at the upper position.
The sewing needle reciprocates in this state and performs the second sewing operation.
During this time, the drive class is determined based on the signal of the sensor.
The sewing machine arm to the upper position
The sensor, and based on the next signal from the sensor,
Operating the feed mechanism to advance the sewing machine main body.
The sewing machine arm in the direction
The sewing needle reciprocates in the state where the sewing needle is located at the upper position.
A tatami stitching apparatus characterized in that ladder stitching is performed by repeatedly performing a second stitching operation .