JPH1099572A - Fabric pressing mechanism in embroidery sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent lift of a fabric to be embroidered and to enable the smooth movements of the fabric by holding a fabric presser at the position of the bottom dead center that prevents a fabric to be worked on from floating at the time of working on embroidery and providing an adjusting means which adjusts the height of the position of the bottom dead center according to the height of the fabric to be worked on. SOLUTION: An embroidery frame 12 on which a fabric to be embroidered is stretched is mounted on a table 3, and an embroidery head 5 is suspended over the table 3 via a bridge. A fabric pressing mechanism 2 which prevents a fabric to be worked on from floating at the position behind a needle 7 and which is provided with a hoisting and lowering member 15 supported at a jaw part 23 so as to be movable up and down 6 and a fabric presser 18 installed at the lower end of the hoisting and lowering member 15 is provided for each embroidery head 5. A fabric pressing position key is provided on a control panel so as to make the bottom dead center within the range of elevation of the fabric presser 18 by a hoisting and lowering mechanism 11 adjustable. During the embroidery, when the key is operated, a controller controls the hoisting and lowering mechanisms 11 according to fabric pressing position data read from data memory.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth holding mechanism for preventing a work cloth stretched over an embroidery frame from rising in an embroidery sewing machine.

[0002]

2. Description of the Related Art A presser foot mechanism in a conventional general embroidery sewing machine is connected to a needle bar so that the presser foot can be moved up and down following the vertical movement of the needle bar. Due to the configuration, noise and vibration were generated. Further, the work cloth or the embroidery may be strongly hit, and the work cloth may be damaged or the finish of the embroidery processing may be deteriorated.

[0003] In view of this, Japanese Patent Publication No. 60-40875 proposes an apparatus in which the operation of the presser foot mechanism is separated from the elevating and lowering movement of the needle bar and can be operated independently. The cloth presser mechanism 120 includes a bracket 121 fixed to a side surface of an embroidery head (not shown) as shown in FIGS.
A drive shaft 122 is rotatably inserted through the bracket 121, and a swing arm 123 is provided on the drive shaft 122. The bracket 1 has a link 1
24 is rotatably supported by a shaft, and a cloth holder 125 is supported by a parallelogram link mechanism formed by the link 124 and the swing arm 123. When the drive shaft 122 is rotated clockwise while the presser foot is at the raised position (top dead center position) as shown in FIG. 14, the needle 126 falls as shown in FIG. Work cloth W at point
Presser foot 1 at position (bottom dead center position) to prevent
25 is lowered. In the state shown in FIG.
When the drive shaft 122 is rotated counterclockwise, the presser foot 12
5 is raised from the bottom dead center position to the top dead center position. The drive shaft 122 has a switch cam 129 fixed thereto, and the position of the work clamp 125 is determined by an upper dead center position detector 127 that detects the position of the switch cam 129 at the lower dead center position or the upper dead center position. This is performed based on the detection signal of the dead point position detector 128.

In order to effectively prevent the work cloth W from being lifted up and to enable the work cloth W to move smoothly, the upper surface of the work cloth and the lower surface of the work clamp 125 are required at the bottom dead center position. It is preferable to maintain an appropriate distance from.
However, in the presser foot mechanism 120, the lower presser foot 12 is detected by the bottom dead center position detector 127 and the switch cam 129.
5, when processing a thin work cloth W, the distance between the upper surface of the work cloth W and the lower surface of the work presser 125 becomes wider, and the work presser 125 rises. Was not sufficiently prevented, and thread breakage sometimes occurred. On the other hand, when processing a thick work cloth W, the distance between the upper surface of the work cloth W and the lower surface of the work presser 125 becomes narrow, and the work presser 125 rubs against the surface of the work cloth W or the surface of embroidery, thereby damaging them. There was something. Further, if the position of the bottom dead center of the work clamp 125 is to be adjusted according to the thickness of the work cloth W, the mounting position of the bottom dead center position detector 127 must be moved, which is very troublesome. Was.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to adjust the position of a work clamp during embroidery processing in accordance with the thickness of a work cloth, thereby effectively preventing the work cloth from lifting up. An object of the present invention is to provide a cloth presser mechanism that enables smooth movement of a work cloth.

[0006]

In order to achieve the above-mentioned object, a cloth holding mechanism in an embroidery sewing machine according to the present invention is provided at a bottom dead center position for preventing a work cloth stretched on an embroidery frame from being lifted during embroidery processing. The fabric presser mechanism in an embroidery sewing machine having a lifting mechanism for holding the presser foot and retracting the presser foot to a top dead center position which is higher than the bottom dead center position and does not hinder movement of the embroidery frame when necessary. An adjusting means for adjusting the height of the bottom dead center position according to the thickness of the cloth is provided.

Although the adjusting means is not particularly limited, the following embodiments can be exemplified. (1) A mode in which the bottom dead center position is adjusted to a height numerically input from the operation panel according to the thickness of the work cloth.

(2) A mode in which the position of the bottom dead center is adjusted to a height programmed according to the thickness of the work cloth at the embroidery location.

(3) A mode in which the position of the bottom dead center is adjusted according to the thickness of the work cloth measured by the cloth thickness sensor.

Although the position of the bottom dead center is not particularly limited, the height of the lower surface of the presser foot with respect to the upper surface of the needle plate is about 0.6 to 2.4 mm. It is preferable to set the distance between the lower surface of the work cloth and the upper surface of the work cloth to about 0.2 mm.

The "when necessary" is not particularly limited, but when the embroidery frame is replaced, when the embroidery processing is stopped, or when a part of the embroidery head is stopped during the embroidery processing in the multi-head embroidery machine. (Only when the embroidery head is at rest).

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a presser mechanism in an embroidery sewing machine embodying the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. First, FIG. 1 schematically shows a main part of an embroidery sewing machine 1 incorporating a cloth presser mechanism 2 of the present embodiment. The embroidery sewing machine 1 includes a table 3 which is wide in the left-right direction. An embroidery frame 12 is placed on the embroidery frame, and a work cloth is stretched over the embroidery frame 12. A bridge 4 is provided on the table 3, and two embroidery heads 5 are arranged in the bridge 4 at intervals. The embroidery head 5 is provided with a plurality of needles 7 so as to be able to change colors, and behind the needles 7 is provided a cloth holding mechanism 2 for preventing the work cloth from floating. On the right side of the table 3, a control device 31 for controlling the operation of the embroidery sewing machine 1 is mounted. Start operation of this embroidery sewing machine 1
The stop is performed by a driving rod 42 provided below and near the table 3.

The embroidery head 5 has a head body 20 fixed to the bridge 4, as shown in FIGS. 2 and 3, and a slide block 29 is provided at the front side of the head body 20 so as to be movable left and right. . On the slide block 29, nine needle bars 6 are supported in parallel with the guide bar 8 and movable up and down. Each needle bar 6 is prevented from rotating around the axis by a rotation preventing mechanism (not shown), and is urged upward by a coil spring 14. A needle 7 is attached to the lower end of each needle bar 6. I have. A guide rod 8 is vertically attached to a jaw 23 projecting forward from a lower part of the head body 20. The guide rod 8 has a vertically movable body 9 vertically driven by the driving force of a main shaft. It is attached to. An engagement element 10 is pivotally mounted on the elevating body 9 so as to be horizontally rotatable. The engagement element 10 engages with one needle bar 6 moved to the center of the front surface of the head main body 20 by the lateral movement of the slide block 29. I do. The vertical movement of the elevating body 9 is transmitted to the needle bar 6.

The presser mechanism 2 includes a lifting member 15 which is inserted into the jaw 23 through a bush 30 and supported so as to be vertically movable.
The lifting member 15 is prevented from rotating around the axis by a rotation preventing mechanism (not shown). A cloth holder 18 having a cushion mechanism 17 is provided below the elevating member 15, and a rack 16 is engraved above the elevating member 15. Also, the head body has a bracket 2
A stepping motor (with a speed reducer) 21 is attached via the motor 2, and a pinion 19 fitted to the rack 16 is attached to the rotation shaft of the stepping motor 21. Therefore, when the stepping motor 21 operates,
The elevating member 15 is vertically moved up and down via the pinion 19 and the rack 16 according to the rotation direction of the rotating shaft. This is the lifting mechanism 11.

The range in which the presser foot 18 can be moved up and down by the elevating mechanism 11 is 0.6 mm (bottom dead center position) to 27 mm (top dead center) in terms of the height of the lower surface of the presser foot 18 with respect to the upper surface of the needle plate 13. Point position). The bottom dead center position can be adjusted by an adjustment process (step S70) described later.
The adjustment range is based on the presser foot 18 based on the upper surface of the needle plate 13.
The height of the lower surface is 0.6 to 2.4 mm, and 10 steps (0.6, 0.8,...) Are performed in 0.2 mm units.
It can be adjusted to 2.4).

The cushion mechanism 17 will be described.
The presser foot 18 is provided with a pair of upper and lower protruding members 24 and 25 which are horizontally protruded from the upper portion thereof.
Is provided with a hole so that the centers thereof coincide with each other in the vertical direction, and the lower end of the elevating member 15 is vertically inserted into the hole. A positioning member 26 of the cloth holder 18 is attached between the protruding members 24 and 25, and the upper protruding member 24 is supported by the positioning member 26 via an O-ring 28. By adjusting the vertical position of the positioning member 26, the initial setting of the bottom dead center position of the work clamp 18 is possible. Positioning member 26 and lower protruding member 2
A cushion spring 27 is provided in a compressed state on the outer periphery of the elevating member 15 between 5, and the presser foot 18 is urged downward with respect to the elevating member 15.
The O-ring 28 absorbs a shock when the positioning member 26 urged by the cushion spring 27 collides with the lower surface of the upper protruding member 24 to prevent noise.

The controller 31 has a built-in controller 33 (described later) for controlling the operation of the embroidery sewing machine 1.
As shown in FIG. 4, the front surface of the control device 31 has a display unit 34 provided on the upper side for displaying operation contents and the like, and a display unit 3.
4 and an operation panel 35 provided with various operation switches, and a disk drive 36 provided below the operation panel 35 for reading and writing embroidery data and the like between a floppy disk. I have.

The display section 34 has a liquid crystal display or C
A display device such as an RT is used. The operation panel 35 includes four function keys including an embroidery data key 37a, a cloth presser position key 37b, a stop key 37c, and an end key 37d.
A power switch 38 of the embroidery sewing machine 1 provided below the function key; a screen switching key 39 provided on the right side of the power switch 38 for switching between a driving operation and an auxiliary operation such as pattern management or changing a presser foot position; A cursor key 40 is provided on the right side of the screen switching key 39 to move the position of the cursor on the screen, and a numeric keypad 41 provided on the right side of the cursor key 40 to input numerical values such as a pattern number and a cloth holding position. I have.

The embroidery data key 37a is used to select one from a plurality of embroidery data recorded on a floppy disk. The presser foot position key 37b is used to change the presser foot position. Cancel key 37c
Is used to cancel the operation and discard the operation content. The end key 37d is used to end the operation and determine the operation content.

The controller 33 includes a CPU (not shown),
It is composed of a readable / writable memory (not shown) and the like.
As shown in FIG. 5, the controller 33 includes an operation panel 3
5, input / output devices such as the driving rod 42 and the disk drive 36, and output devices such as the display unit 34, the elevating mechanism 11, the spindle motor 56, the frame driving mechanism 57, the color changing mechanism 58, the thread cutting mechanism 59, and the canceling mechanism 43. Are connected via an interface (not shown).

A data memory 46 is provided in a readable / writable memory of the controller 33.
Includes presser foot position data 47 indicating the position of the presser foot;
And embroidery data 48 constituting one embroidery pattern.

The cloth presser position data 47 includes a bottom dead center position data storing a bottom dead center position for preventing the work cloth stretched on the embroidery frame 12 from being lifted during embroidery processing. The jump position is a jump position at which the presser foot 18 does not contact the surface of the work cloth and the surface of the embroidery. The height (mm unit) from the needle plate 13 is stored as the bottom dead center position data, and the height (mm) from the bottom dead center position is stored as the jump position data.
Unit) is stored. The value of the jump position data is not particularly limited, but may be 2 mm from the bottom dead center position.
It is preferable to set the position to a higher level.

The embroidery data 48 includes, as shown in FIG.
One stitch data 49 as embroidery information for one stitch is stored as an array. The single stitch data 49 includes XY data 50 indicating coordinates to be embroidered, a color change code 51 indicating a needle to be embroidered, and a jump code 5 indicating whether to perform jump sewing.
2 and a head selection code 53 indicating the embroidery head 5 used for embroidery processing.

The head selection code 53 indicates whether to use both the embroidery heads 5, 5, only the left embroidery head 5, or only the right embroidery head 5. Thus, the embroidery sewing machine 1 has one stitch data 4
The operation / pause of each embroidery head 5 can be controlled for each of the nine embroidery heads, and embroidery using two embroidery threads with the number of stitches is possible by alternately switching the two embroidery heads 5. .

An adjustment process (step S70) for adjusting the values of the bottom dead center position data and the jump position data stored in the cloth presser position data 47 will be described with reference to the flowchart of FIG. When the cloth press position key 37b of the operation panel 35 is pressed by the operator, the controller 33 starts an adjustment process (step S70) and the data memory 4
From step 6, the presser foot position data 47 is read out to the work area 54 (step S71). And, as shown in FIG.
A screen for adjusting the presser foot position is displayed on the display unit 34 (step S72).

The screen for adjusting the presser foot position is provided with a bottom dead center position input area 60 and a jump position input area 61. In both areas, the current data is displayed as they are ( (The working position is 1 mm and the jump position is 2 mm.) The bottom dead center position input area 60 is highlighted (hatched) to indicate that the area is to be adjusted. The highlighted display is moved between the bottom dead center position input area 60 and the jump position input area 61 when the up arrow or down arrow cursor key 40 is pressed.

When the numeric keypad 41 displaying "SET" is pressed after the numeric keypad 41 displaying the number is pressed at least once, the controller 33 displays the numerical value in the highlighted input area. At the same time, the corresponding data stored in the work area 54 is changed (step S73).

For example, in the state of FIG. 4, to change the jump position to 3 mm, the operator presses the down arrow cursor key 40 once to move the highlighted display to the jump position input area 61. Next, once the numeric keypad 41 indicating “3” is pressed, and then the numeric keypad 41 indicating “SET” is pressed, “3” is displayed in the jump position input area 61 and the work area 54 is displayed. Is changed to "3".

When the end key 37d is pressed (Step S)
74) The controller stores the presser foot position data in the work area 54 in the data memory 46.
(Step S75), and the process ends (step S76). When the stop key 37c is pressed (step S
74), the controller 33 immediately ends the processing without changing the contents of the presser foot position data 47 in the data memory 46 (step S76).

Embroidery processing of the embroidery sewing machine 1 provided with the cloth presser mechanism 2 configured as described above (step S80).
Referring to the flowchart shown in FIG. 8, the data memory 46 stores embroidery data 48 read from the disk drive 36, and when the operator turns on the driving rod 42, Controller 3
3 starts the embroidery processing (step S80). First, the controller 33 performs embroidery processing on each one-needle data 49 of the embroidery data (steps S81 to S85).
Is repeated (step S86), or when the driving rod 42 is turned off by the operator (step S87), the repetition is stopped, and the thread trimming mechanism 59 cuts the embroidery thread. (Step S8
8) The cloth presser 18 is moved to the top dead center position by the cloth presser mechanism 2 (step S89), and the process is terminated (step S90).

The embroidery processing (steps S81 to S85) for each single stitch data 49 will be described. First, the controller 33 reads one single stitch data 49 to be embroidered (step S81). At this time, if the head selection code 53 causes one of the embroidery heads 5 to pause, the cancel mechanism 43 of the embroidery head 5 to be paused is operated so that the needle bar 6 is not driven up and down, and Activate the mechanism 11 to raise the work clamp 18 to the top dead center position (step S
82).

For the embroidery head 5 to be operated, the controller 33 refers to the jump code 52, and when the code is a jump stitch, the needle bar 6 is not driven by the canceling mechanism 43, and the cloth is moved by the elevating mechanism 11. The presser 18 is moved to the jump position, and if the sewing is not jump sewing, the cloth presser 18 is moved to the bottom dead center position (step S83). The height of the presser foot 18 at this time is set to the height of the presser foot position data 47. This is the adjustment means of the cloth presser mechanism 2.

Then, the controller 33 moves the embroidery frame 1 to the position stored in the XY data 50 by the frame driving mechanism 57.
2 is moved (step S84). Then, in the operating embroidery head 5, stitches are formed on the work cloth by the needle bar 6 driven by the main shaft (step S85).

According to the presser foot mechanism 2 of the embroidery sewing machine 1 configured as described above, since the presser foot lowering mechanism 2 is provided in the presser foot presser mechanism 2 independently of the vertical movement of the needle bar 6,
8 is raised only when necessary, such as when the embroidery frame 12 is replaced. Therefore, even if the needle bar 6 is raised and lowered at a high speed, there is no problem that a collision sound is generated.

An adjusting means (step S8) for adjusting the bottom dead center position or the jump position to the height inputted numerically from the operation panel 35 (step S70) according to the thickness of the work cloth.
Since 3) is provided, it is possible to easily adjust these positions in accordance with the thickness of the work cloth, thereby effectively preventing the work cloth from floating and moving the work cloth smoothly. Can be.

When the embroidery processing is completed, the work clamp 18 is automatically moved to the top dead center position (step S89). The cloth foot 18 does not hinder these operations when the sheet is re-stretched.

The presser foot 1 of the embroidery head 5 to be stopped
Since the embroidery thread 8 is automatically moved to the top dead center position (step S82), the two embroidery heads 5 are alternately switched to perform embroidery using embroidery threads of two stitches. In the case, the presser foot 18 of the embroidery head 5 to be stopped is
2 does not interfere.

Further, at the time of jump sewing, the presser foot is moved to a jump position higher than the bottom dead center position and at a height where the presser foot does not contact the surface of the work cloth and the surface of the embroidery (step S83). Presser foot 1 when embroidery frame 12 moves
8 rubs against the surface of the work cloth or the surface of the embroidery, and there is no risk of damaging them.

Further, the presser foot 18 is provided with a cushion mechanism 17.
Therefore, even when the thickness of the work cloth is different depending on the embroidery place such as an applique, for example, in a portion where the work cloth is thick, the cloth presser 18 temporarily rises to reduce the thickness. It is designed to absorb the differences.

FIG. 9 shows a cloth presser mechanism in the embroidery sewing machine according to the second embodiment. This embodiment is different from the first embodiment only in the following points.

The lifting mechanism 99 of the cloth presser mechanism 98 includes a link 10 having one end fixed to the shaft of the stepping motor 21.
0 is provided. The other end of the link 100 has a link 10
0, a notch 101 is provided along the longitudinal direction.
Numeral 01 is slidably engaged with a pin 102 provided at the upper end of the elevating member 15 in a horizontal direction. Therefore, when the link 100 is turned up and down in accordance with the rotation direction of the shaft of the stepping motor 21, the elevating member 15 is moved up and down accordingly.

According to this embodiment, the same effects as those of the first embodiment can be obtained.

Next, a cloth presser mechanism in the embroidery sewing machine according to the third embodiment will be described with reference to FIG.
This embodiment is different from the first embodiment only in the following points.

As shown in FIG. 10, cloth presser position data 106 is added to each stitch data 105 of the embroidery data 104 as compared with the first embodiment. As the presser foot position data 106, the position of the presser foot 18 for each one stitch data 105 is stored, and the bottom dead center position of the presser foot 18 can be programmed according to the thickness of the work cloth at the embroidery location. ing. Therefore, in the present embodiment, the work clamp position data 47 and the work area 54 in the first embodiment are used.
And the processing of adjusting the presser foot position data 47 (step S7).
0) is not provided.

The embroidery processing shown in FIG. 8 (step S80)
In step S83, the controller 33
The lifting mechanism 11 is controlled to adjust the bottom dead center position of the work clamp 18 to the position stored in the work clamp position data 106. This is the adjusting means of the cloth presser mechanism.

According to this embodiment, in addition to the same effects as in the first embodiment, the position of the bottom dead center of the work clamp 18 is adjusted to a programmed height in accordance with the thickness of the work cloth at the embroidery location. (Step S83), the work cloth can be effectively prevented from being lifted even when embroidering a material having a large difference in thickness depending on the embroidery location such as applique.
In addition, the work cloth can be moved smoothly.

Next, a cloth presser mechanism in the embroidery sewing machine according to the fourth embodiment will be described with reference to FIG.
This embodiment is different from the first embodiment only in the following points.

The input to the controller 111 is shown in FIG.
As shown in the figure, compared to the first embodiment, the cloth thickness sensor 11
0 is added, and the cloth thickness sensor 110 is provided near the needle 7 drop point of the embroidery head 5 and measures the thickness of the work cloth around the needle 7 drop point.

The embroidery processing shown in FIG. 8 (step S80)
In step S83, the controller 111
Controls the elevation mechanism 11 to adjust the position of the work clamp 18 in accordance with the thickness of the work cloth measured by the work thickness sensor 110. This is the adjusting means of the cloth presser mechanism.

As described above, in this embodiment, since the position of the presser foot 18 is automatically adjusted, the adjustment processing of the presser foot position data 47, the work area 54 and the presser foot position data 47 in the first embodiment is performed. (Step S70) is not provided.

According to the present embodiment, in addition to the same effect as the first embodiment, the bottom dead center position of the work clamp 18 is automatically set in accordance with the thickness of the work cloth measured by the work thickness sensor 110. Since the adjustment is performed (step S83), the operator does not need to adjust the position of the work clamp 18.

Note that the present invention is not limited to the configuration of the above-described embodiment, and may be embodied by appropriately changing, for example, the following without departing from the spirit of the invention.

(1) In order to reduce the friction with the surface of the work cloth, the cloth presser 115 is formed in a hollow substantially hemispherical shape as shown in FIG.

(2) In the first embodiment or the second embodiment, the presser foot position is set by a jog operation with the cursor key 40 instead of the numerical value input with the ten keys 41.

(3) The embroidery head 5 is of a type in which the needle bar 6 is moved in a horizontal arc.

[0056]

As described above in detail, according to the cloth presser mechanism of the embroidery sewing machine according to the first aspect of the present invention, the position of the cloth presser during embroidery processing can be adjusted according to the thickness of the work cloth. In addition, it is possible to obtain an effect of effectively preventing the work cloth from being lifted and enabling the work cloth to move smoothly.

Further, the same effect as in the first aspect can be obtained by the cloth presser mechanism in the embroidery sewing machine according to the second, third or fourth aspect of the present invention.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing a main part of an embroidery sewing machine incorporating a cloth presser mechanism according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a front view of a control device of the embroidery sewing machine.

FIG. 5 is a block diagram of the control device.

FIG. 6 is a diagram showing embroidery data of the control device.

FIG. 7 is a flowchart showing a flow of an adjusting process of the cloth presser mechanism.

FIG. 8 is a flowchart showing a flow of an embroidery processing process of the control device.

FIG. 9 is a partial sectional side view showing an embroidery head of an embroidery sewing machine incorporating a cloth presser mechanism according to a second embodiment of the present invention.

FIG. 10 is a view showing embroidery data of an embroidery sewing machine incorporating a presser mechanism according to a third embodiment of the present invention;

FIG. 11 is a block diagram of a control device for an embroidery sewing machine incorporating a cloth presser mechanism according to a fourth embodiment of the present invention.

FIG. 12 is a partial side sectional view showing a modified example of the presser foot mechanism of the embodiment embodying the present invention.

FIG. 13 is a partial side sectional view showing a conventional cloth presser mechanism.

FIG. 14 is a partial side sectional view showing another state of the cloth presser mechanism.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 embroidery sewing machine 2 cloth presser mechanism 11 elevating mechanism 12 embroidery frame 13 needle plate 18 cloth presser 35 operation panel S83 adjusting means 98 cloth presser mechanism 99 elevating mechanism 106 cloth presser position data 110 cloth thickness sensor

Claims (4)

[Claims] 1. A cloth presser is held at a bottom dead center position for preventing a work cloth stretched on an embroidery frame from being lifted during embroidery processing.
A cloth presser mechanism for an embroidery sewing machine having an elevating mechanism for retracting the presser at a top dead center position higher than the lower dead center position and not hindering the movement of the embroidery frame when necessary; A presser mechanism in an embroidery sewing machine having an adjusting means for adjusting the height of the bottom dead center position. 2. The cloth presser mechanism for an embroidery sewing machine according to claim 1, wherein the adjusting means adjusts the position of the bottom dead center to a height numerically input from an operation panel according to a thickness of the work cloth. . 3. The cloth presser mechanism according to claim 1, wherein the adjusting means adjusts the position of the bottom dead center to a height programmed according to a thickness of the work cloth at an embroidery location. 4. The cloth presser mechanism for an embroidery sewing machine according to claim 1, wherein said adjusting means adjusts the position of said bottom dead center in accordance with a thickness of said work cloth measured by a cloth thickness sensor.