JP2001207371A - Sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewing machine ensuring a drive frame to be driven accurately. SOLUTION: This sewing machine 1 has a drive frame 11 placed on a table 3 and at least two Y-direction driving mechanisms 8 disposed at interval(s) in the transverse direction of the sewing machine 1 and intended for driving the drive frame 11 in the longitudinal direction of the sewing machine 1, and also has upper frames 4 and 5 set up on the table 3; wherein each of the above driving mechanisms 8 has a rail 17 provided on the upper frames 4 and 5 and extending in the longitudinal direction of the sewing machine 1, a mobile section 18 provided on the rail 17 slidably in the longitudinal direction of the sewing machine 1 and linked to the drive frame 11, and a driving unit 19 for driving the mobile section 18 in the longitudinal direction of the sewing machine 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine provided with a Y-direction drive mechanism for moving a driving frame for stretching and holding a work cloth on a table of the sewing machine in the front-rear direction of the sewing machine.

[0002]

2. Description of the Related Art FIG. 12 shows a sewing machine 50 provided with a conventional Y-direction driving mechanism. The sewing machine 50 is adapted to sew both a tubular work cloth and a flat work cloth, and includes a lower frame 51 supported in a substantially horizontal direction extending in the X direction (the left-right direction of the sewing machine 50). A table 52 supported substantially horizontally on the lower frame 51, and an upper frame 53 erected above the table 52 in parallel with the lower frame 51;
And a pair of sewing heads 54 arranged in the X direction on the front surface of the upper frame 53, and a row of the lower frame 51 corresponding to each sewing head 54 so that the upper surface is substantially flush with the upper surface of the table 52. A pair of beds 55 provided and a table 5
2, a pair of Y-direction drive mechanisms 57 for moving the drive frame 56 in the Y direction on the table 52, and an X-direction drive mechanism 58 for moving the drive frame 56 in the same X direction.
And

[0003] The bed 55 has a base portion 55a supported by the lower frame, and a cylindrical portion 55b extending forward from the base portion 55a. The table 52 includes a fixed portion 52a provided from the rear side of the sewing machine 50 to the left and right side portions.
And a lifting / lowering portion 5 disposed in a recess on the front side of the fixing portion 52a.
2b. The elevating part 52b can be lowered below the bed 55,
In a state where 2b is raised and a state where 2b is lowered, a planar work cloth and a cylindrical work cloth can be processed, respectively.

The Y-direction driving mechanism 57 is provided below the fixed part 52a on the left and right sides of the elevating part 52b so as not to interfere with the elevating part 52b of the table 52 which elevates. The two Y-direction drive mechanisms 57 are respectively connected to ends of a base 59 of a drive frame 56 extending in the left-right direction of the sewing machine 50 via slits 52c extending in the Y-direction provided in the table 52. The base 59 incorporates an X-direction drive mechanism 58 that drives the frame 60 of the drive frame 56 in the left-right direction of the sewing machine 50.

[0005]

However, when the number of sewing machine heads 54 is increased, the distance between the two Y-direction drive mechanisms 57 is increased, and when the Y-direction drive mechanism 57 is operated, the base 59 of the drive frame 56 is moved downward. The central portion 59a is easily bent. Therefore, when the drive frame 56 is driven in the Y direction, there is a problem that the central portion 59a of the base 59 largely vibrates, and the positioning accuracy of the drive frame 56 is reduced.

An object of the present invention is to solve the above-mentioned problems and to provide a sewing machine capable of driving a drive frame with high accuracy.

[0007]

In order to achieve the above object, a sewing machine according to the present invention includes a drive frame mounted on a table of the sewing machine, and a drive frame driven in a front-rear direction of the sewing machine.
A sewing machine comprising at least two Y-direction driving mechanisms disposed at intervals in the left-right direction of the sewing machine, comprising: an upper frame provided on the table; and all of the Y-direction driving mechanisms A rail provided on the frame and extending in the front-rear direction of the sewing machine, a movable portion provided on the rail so as to be slidable in the front-rear direction of the sewing machine, and connected to the drive frame, and driving the movable portion in the front-rear direction of the sewing machine. And a driving unit that performs the operation.

The sewing machine includes the two Y-direction drive mechanisms, and each of the Y-direction drive mechanisms is disposed inside the left and right ends of the drive frame when viewed from above (ie, each of the Y-direction drive mechanisms). The directional drive mechanisms may be disposed inside the drive frame in the left-right direction of the sewing machine, for example).

The Y-direction drive mechanism is configured such that the rear end of the Y-direction drive mechanism is floated from the table so as not to limit the movement of the drive frame to the rear of the sewing machine. Can be exemplified.

The sewing machine may include at least one sewing machine.
The two Y-direction drive mechanisms are disposed inside the left and right ends of the drive frame when viewed from a plane, and the Y-direction drive mechanism is configured not to restrict the movement of the drive frame to the rear of the sewing machine. Can be exemplified in a state in which the rear end of the is floated from the table.

The sewing machine includes two Y-direction drive mechanisms, and the table is configured such that a front side in front of the bed can be lowered or removed, and each of the Y-direction drive mechanisms is viewed from a plane. Thus, it is possible to exemplify a mode in which the bed is provided inside the left and right ends of the front side of the bed.

The table has a front portion in front of the bed which can be lowered or detached, and at least one Y-direction drive mechanism is provided inside the left and right ends of the front portion of the bed when viewed from a plane. Along with
In order not to limit the movement of the drive frame to the rear of the sewing machine, a mode can be exemplified in which the rear end of the Y-direction drive mechanism is floated from the table.

The state in which the rear end of the Y-direction drive mechanism is floating from the table is not particularly limited. However, the rear end of the Y-direction drive mechanism and the table or the sewing machine frame below the upper surface of the table may be used. Can be exemplified.

The position where the Y-direction drive mechanism is provided is not particularly limited, but is preferably a position where the amount of deflection of the entire drive frame can be minimized.

The sewing machine includes a base portion of a drive frame extending in the left-right direction of the sewing machine connected to the Y-direction drive mechanism, a frame portion of a drive frame provided on the base portion so as to be slidable in the left-right direction of the sewing machine, An X-direction drive mechanism for driving the frame in the left-right direction of the sewing machine; the X-direction drive mechanism includes: an X-direction drive motor supported by a sewing machine frame; and a front-rear direction of the sewing machine connected to the X-direction drive motor. , An X-direction drive pulley provided to be capable of transmitting torque to the torque transmission shaft and slidably forward and backward, and converting the torque of the X-direction drive pulley into a left-right drive force of the sewing machine, An X-direction transmitting portion for transmitting the driving force to the base portion, the base portion being supported so that one end thereof slides back and forth along with the X-direction driving pulley along the torque transmission shaft, and Can be exemplified before and after slidably supported manner along a slide guide member extending in the longitudinal direction of.

The sewing machine includes a base portion of a drive frame extending in the left-right direction of the sewing machine, the base portion being connected to the Y-direction driving mechanism and supported by a sewing machine frame so as to be slidable in the front-rear direction of the sewing machine. A frame portion of a drive frame slidably provided in the left-right direction of the sewing machine; and an X-direction drive mechanism for driving the frame portion in the left-right direction of the sewing machine. The X-direction drive mechanism is rotatably supported by the base. An X-direction feed screw screw extending in the left-right direction of the sewing machine, and a female screw portion connected to the frame portion and screwed to the X-direction feed screw screw according to the rotation direction of the X-direction feed screw screw. And an X-direction movable portion that moves in the left-right direction of the sewing machine, and an X-direction drive motor that rotationally drives the X-direction feed screw screw.

[0017]

1 to 3 show a sewing machine 1 according to a first embodiment of the present invention. This sewing machine 1
The sewing machine is capable of sewing both a tubular work cloth and a flat work cloth, and has a pair of left and right columns 15 standing on the floor surface and an X-direction (sewing machine) supported substantially horizontally by the both columns 15. 1, a lower frame 2 extending in the left-right direction, a table 3 supported substantially horizontally on the lower frame 2, and a first upper frame 4 erected on both columns 15 above the table 3 in parallel with the lower frame 2. A second upper frame 5 laid on both columns 15 behind the first upper frame 4, four sewing machine heads 6 arranged in the X direction on the front surface of the first upper frame 4, Four beds 7 arranged in the lower frame 2 corresponding to the respective machine heads 6 so as to be substantially flush with the upper surface of the lower frame 3.
A pair of left and right Y-direction driving mechanisms 8 extending in the Y-direction (the front-rear direction of the sewing machine) arranged at intervals on the lower surfaces of the first upper frame 4 and the second upper frame 5, and mounted on the table 3. And a drive frame 11 connected to the two Y-direction drive mechanisms 8.
Base 9 and an X-direction drive mechanism 10 built in the base 9
And a frame portion 14 of the drive frame 11 connected to the X-direction drive mechanism 10. The frame portion 14 includes a frame holding body 12 connected to the X-direction drive mechanism 10 and extending in the X direction, and a frame holding projecting from the frame holding body 12 in front of the sewing machine 1 and laterally of each bed 7. A body arm portion 12a and a sewing frame 13 held by the frame holding body arm portion 12a corresponding to each sewing machine head 6 are provided.

The bed 7 has a base portion 7a supported by the lower frame 2, and a cylindrical portion 7b extending forward from the base portion 7a.
And The table 3 is a base 7 of the bed 7
a fixed portion 3a disposed on the rear side of the sewing machine 1 from the side of
And an elevating part 3b as a front part disposed in front of the fixing part 3a. The elevating unit 3 b can be lowered below the bed 7.
In a state where b is raised, the upper surface of the fixed part 3 a and the elevating part 3 b of the table 3 and the bed 7 are configured to be substantially flush. In this state, the flat work cloth is processed. Further, when the elevating unit 3b is lowered, the tubular portion 7b of the bed 7 is configured to be exposed. Then, in this state, the cylindrical work cloth is processed.

The pair of Y-direction drive mechanisms 8 are disposed inside the left and right ends of the drive frame 11 when viewed from above (that is, each of the pair of Y-direction drive mechanisms 8 has a drive frame 11 in the X direction). Is arranged inside). Each Y-direction drive mechanism 8 includes a rail base 16 extending in the Y direction attached to the lower surfaces of the first upper frame 4 and the second upper frame 5,
A rail 17 extending in the Y direction provided on the lower surface of the lower wall 16a of the rail base 16, a movable portion 18 slidably provided on the rail 17 in the Y direction,
And a driving unit 19 that drives in the direction. Drive unit 19
The driven pulley 20 and the driving pulley 21 are respectively provided rotatably before and after the rail base 16, and a pair of pulleys 20, via an upper side of a lower wall 16 a of the rail base 16.
A drive belt 22 is provided around the movable portion 18 and is wound around the movable portion 18. And both Y
The drive shaft 21 of the drive motor 23 is connected to the drive pulley 21 of the direction drive mechanism 8 via a drive shaft 35.
The drive motor 23 is attached to the rear surface of the second upper frame 5 via a bracket 25. The movable part 18 is connected to the base 9 of the drive frame 11 via a hollow pipe-shaped connecting member 24.
It is connected to. Thus, the Y-direction drive mechanism 8
In order not to restrict the movement of the drive frame 11 to the rear of the sewing machine, the rear end 8a of the Y
It is configured to be in a state of floating from.

The base 9 of the drive frame 11 is formed in a hollow rectangular tube shape, and has an X-direction drive mechanism 10 built therein.

The X-direction drive mechanism 10 moves the frame 14 of the drive frame 11 relative to the base 9 of the drive frame 11 in the X direction. The X-direction drive mechanism 10 is provided on the upper surface of the lower wall 9a of the base 9. 26, a pair of movable parts 27 provided on the rail 26 so as to be slidable in the X direction,
And a driving unit 28 for driving the X-ray 7 in the X direction. The drive unit 28 includes a driven pulley 29 and a drive pulley 30 rotatably provided on the left and right sides of the rail 26, respectively, and a drive belt 31 wound around the pulleys 29 and 30. The drive belt 31 is connected to the pair of movable parts 27. The drive pulley 30 is connected to a drive motor 32. Each movable section 27 is connected to the frame holder body 12.

According to the sewing machine 1 configured as described above,
Since all the Y-direction drive mechanisms 8 are provided above the table 3, the Y-direction drive mechanisms 8 are arranged inside the left and right ends of the elevating part 3b of the table 3 (that is, inside in the X direction) when viewed from above. Even if it is provided, it does not interfere with the elevating of the elevating unit 3b. Therefore, for example, the Y-direction drive mechanism 8 can be appropriately disposed at an optimal position where the deflection of the entire base 9 of the drive frame 11 is minimized, so that the drive frame 11 can be accurately driven. .

As described above, the Y-direction drive mechanism 8 is connected to the table 3
Above, the inner side (ie, the left and right ends of the drive frame 11 of the elevation unit 3b of the table 3 when viewed from a plane)
The Y-direction drive mechanism 8 can be disposed inside (in the X direction). Each of the Y-direction driving mechanisms 57 is
The width of the sewing machine 1 in the X direction can be narrower than that of the conventional sewing machine 50 provided below the fixed portion 52a on the left and right sides of the sewing machine 2b, and thus the occupied space of the sewing machine 1 can be reduced.

The Y-direction drive mechanism 8 is provided to prevent the movement of the drive frame 11 to the rear of the sewing machine from being restricted.
The rear end portion 8a of the directional drive mechanism 8 is configured to float from the table 3. Unlike the present embodiment, for example, when the rear end portion 8a and the lower frame 2 are connected by a connecting member, (1) a problem that the backward movement of the drive frame 11 is restricted by the connecting member,
(2) In order to secure a large rearward movement range of the drive frame 11, the connecting member must be protruded rearwardly, and a problem such as an increase in the width of the sewing machine 1 in the Y direction occurs. However, according to the present embodiment, these problems do not occur at all. Therefore, according to the present embodiment, the rearward movement range of the base 9 of the drive frame 11 can be sufficiently ensured without increasing the width of the sewing machine 1 in the Y direction.

Next, FIG. 4 shows a sewing machine 40 according to a second embodiment. This sewing machine 40 is different from the first embodiment only in that one Y-direction driving mechanism 8 is added to the center of the sewing machine 40 in the X direction. It is different from the form. In addition to the effects of the first embodiment, the addition can reduce the bending at the intermediate portion in the length direction of the base 9 of the drive frame 11. With this addition, the Y-direction drive mechanism 8 on the left and right ends is provided near the left and right ends of the base 9 so as to reduce the deflection at the end of the base 9. As described above, the base 9 of the drive frame 11
The overall deflection can be reduced as compared with the first embodiment, and thus the drive frame 11 can be driven more accurately.

In this embodiment, since the basic structure of all the Y-direction drive mechanisms 8 is the same, variations in the operation of the Y-direction drive mechanism 8 can be reduced, and
The drive frame 11 can be driven with higher accuracy.

FIGS. 5 and 6 show a sewing machine 42 according to the third embodiment. This sewing machine 42 differs from the first embodiment only in the following points. For this reason, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

In the present embodiment, the drive motor 23 is mounted on the lower surface of the left end of the second upper frame 5. The rotation shaft of the drive motor 23 is driven by a belt transmission mechanism including pulleys 43 and 44 attached to the rotation shaft 23a and the drive shaft 35 of the drive motor 23 and a belt 45 wound around the pulleys 43 and 44, respectively. The rotation force of 23 a is configured to be transmitted to the drive shaft 35.

According to the present embodiment, in addition to the effects of the first embodiment, by attaching the drive motor 23 to the lower surface of the second upper frame 5, the drive motor 23 is prevented from protruding backward from the second upper frame 5. So Y
The sewing machine 42 can be configured so that the width in the direction becomes narrow.

Next, FIG. 7 shows a sewing machine 48 according to a fourth embodiment. In this sewing machine 48, the mounting position of the drive motor 23 is set to the lower surface at the center in the length direction of the second upper frame 5, and The second embodiment is different from the second embodiment only in that the same belt transmission mechanism as in the third embodiment is used to transmit the torque of the rotation shaft 23a of the drive motor 23 to the drive shaft 35. Therefore, according to the present embodiment, in addition to the effect of the second embodiment, the same effect as that of the third embodiment can be obtained.

FIG. 8 shows a sewing machine 70 according to a fifth embodiment. This sewing machine 70 differs from the first embodiment only in that another X-direction drive mechanism is employed as described below. are doing. For this reason, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

The sewing machine 70 has a base 72 of a drive frame 71 extending in the left-right direction of the sewing machine 70 connected to the same Y-direction drive mechanism as in the first embodiment via the connecting member 24, and the sewing machine 70 is attached to the base 72. A frame 73 of a drive frame 71 slidably provided in the left and right direction of the
And an X-direction drive mechanism 74 for driving in the left-right direction. A sewing frame 87, which is formed in a rectangular frame shape and stretches a work cloth, is attached to the frame portion 73.

On the upper surface of the base 72, a pair of left and right X-direction rails 75, 76 extending in the left-right direction of the sewing machine 70 are arranged in a line. Each of the X-direction rails 75 and 76 is slidable in the left and right direction of the sewing machine 70 along the rail.
Direction movable parts 77 and 78 are provided. Each of the X-direction movable portions 77 and 78 is connected to the frame portion 73 of the drive frame 71. As described above, the frame 73 is attached to the sewing machine 7 with respect to the base 72.
0 is provided so as to be slidable in the left-right direction.

The X-direction drive mechanism 74 includes an X-direction drive motor 79 supported by a sewing machine frame (not shown) and the X-direction drive motor 79.
A torque transmission shaft 80 extending in the front-rear direction of the sewing machine 70 connected to the directional drive motor 79; an X-direction drive pulley 81 provided to be capable of transmitting torque to the torque transmission shaft 80 and being slidable in the forward and backward directions; And an X-direction transmitting unit 82 that converts the torque of 81 into a driving force in the left-right direction of the sewing machine 70 and transmits the driving force to the frame unit 73. The tip side of the torque transmission shaft 80 is supported by the sewing machine frame via a bearing 83.

The X-direction transmitting portion 82 transmits the torque of the X-direction driving motor 79 to the frame portion 73 via the X-direction movable portion 77 on the X-direction driving pulley side. An X-direction driven pulley 84 rotatably provided on the base 72 on the X-direction driving pulley side, and an X-direction driving belt 85 wound around the pulleys 81 and 84 and having both ends connected to the X-direction movable portion 77. It has.

The base 72 has one end supported to slide back and forth along the X-direction drive pulley 81 along the torque transmission shaft 80, and the other end to a slide rail 86 as a slide guide member extending in the front-rear direction of the sewing machine 70. Is supported so as to be able to slide back and forth along. The slide rail 86 is supported by the sewing machine frame.

When the X-direction drive motor 79 rotates, torque due to the rotation is transmitted to the frame 73 via the torque transmission shaft 80, the X-direction drive pulley 81, the X-direction transmission unit 82, and the X-direction movable unit 77. The frame 73 is moved in the left-right direction according to the rotation direction.

According to the sewing machine 70 of the present embodiment, in addition to the effect of the sewing machine of the first embodiment, the X-direction drive motor 79 is supported by the sewing machine frame.
The weight of the direction drive motor 79 is not applied. Therefore, for example, it is easy to drive the drive frame at high speed, drive accurately, or drive with low driving force.

FIGS. 9 and 10 show a sewing machine 90 according to a sixth embodiment. This sewing machine 90 is similar to that of the fifth embodiment only in that another X-direction drive mechanism is employed as described below. It is different from the form. For this reason, the same parts as those in the fifth embodiment are denoted by the same reference numerals, and redundant description will be omitted.

The sewing machine 90 includes a base 92 of a drive frame 91 extending in the left-right direction of the sewing machine 90 and connected to a Y-direction drive mechanism similar to that of the first embodiment via the connecting member 24. Frame portion 93 of a drive frame 91 provided slidably in the left-right direction of the
And an X-direction drive mechanism 94 that drives the camera in the left-right direction. A sewing frame 87, which is formed in a rectangular frame shape and stretches a work cloth, is attached to the frame portion 93.

An X-direction rail 95 extending in the left-right direction of the sewing machine 90 is provided on the front surface of the base 92. The X-direction rail 95 has a pair of left and right X-direction movable parts 96 and 9 slidable in the left-right direction of the sewing machine 90 along the rail 95.
6 are provided. Each X-direction movable portion 96 includes a drive frame 91
Are connected to the frame portion 93 of FIG. As described above, the frame 93 is provided so as to be slidable in the left-right direction of the sewing machine 90 with respect to the base 92.

The X-direction drive mechanism 94 includes an X-direction drive motor 79 supported by a sewing machine frame (not shown) and the X-direction drive motor 79.
A torque transmission shaft 80 extending in the front-rear direction of the sewing machine 90 connected to the directional drive motor 79; an X-direction drive pulley 81 provided to be capable of transmitting torque to the torque transmission shaft 80 and being slidable back and forth; An X-direction transmitting portion 97 is provided for converting the torque of 81 into a driving force in the left-right direction of the sewing machine 90 and transmitting the torque to the frame portion 93. The tip side of the torque transmission shaft 80 is supported by the sewing machine frame via a bearing 83.

The X-direction transmitting portion 97 is formed in a loop shape by being wound around an X-direction driven pulley 98 rotatably provided at an end of the base 92 opposite to the X-direction driving pulley, and both pulleys 81 and 98. And an X-direction drive belt 99 connected to each X-direction movable portion 96. The center axis 100 of the X-direction driven pulley 98 extends in the front-rear direction of the sewing machine 90 in parallel with the torque transmission shaft 80, and is supported by the sewing machine frame via a pair of front and rear bearings 101. An X-direction driven pulley 98 is provided to be slidable back and forth.

The base 92 is supported at one end so as to slide back and forth along with the X-direction drive pulley 81 along the torque transmission shaft 80, and has the other end along the center axis 100 of the X-direction driven pulley 98 in the X-direction. Driven pulley 98
It is supported to slide back and forth with it.

When the X-direction drive motor 79 rotates, the torque due to the rotation is transmitted to the frame 93 via the torque transmission shaft 80, the X-direction drive pulley 81, the X-direction transmission 97, and the X-direction movable 96. The frame 93 is moved in the left-right direction according to the rotation direction.

The same effect as that of the fifth embodiment can be obtained by the sewing machine 90 of the present embodiment having the above-described configuration.

FIG. 11 shows a sewing machine 11 according to a seventh embodiment.
0, this sewing machine 110 differs from the first embodiment only in the following points. For this reason, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

The sewing machine 110 is connected to a Y-direction drive mechanism similar to that of the first embodiment via a connecting member 24, and is supported by a sewing machine frame (not shown) so as to be slidable in the front-rear direction of the sewing machine 110. A base 112 of a drive frame 111 extending in the left-right direction of the sewing machine 110, a frame 113 of a drive frame 111 provided on the base 112 so as to be slidable in the left-right direction of the sewing machine 110, and the sewing machine 11
And an X-direction drive mechanism 114 for driving the camera in the left-right direction. A sewing frame 87, which is formed in a rectangular frame shape and stretches a work cloth, is attached to the frame portion 113.

An X-direction drive mechanism 114 is rotatably supported by a base 112 via a bearing 115 and extends in the left-right direction of the sewing machine 110.
A pair of X-direction movable portions 117, 117 having a female screw portion 117a screwed to the X-direction feed screw screw 116 and moving in the left-right direction of the sewing machine 110 in accordance with the rotation direction of the X-direction feed screw screw 116; A pair of X-direction drive motors 118, 118 provided on both ends of the base 112 for driving the X-direction feed screw screw 116 to rotate are provided.

The base 112 has both ends on the sewing machine 110.
A pair of left and right slide rails 119 extending in the front-rear direction of
It is slidably supported along 119. Each slide rail 119 is supported by the sewing machine frame.

Then, both X-direction drive motors 118, 11
8 rotates synchronously, the X-direction feed screw 1
16 is rotated, and the X-direction movable portions 117 and 117 and the frame 113 screwed to the X-direction feed screw 116 are accurately moved right and left in accordance with the rotation direction and the rotation amount.

According to the sewing machine 110 of this embodiment, in addition to the effects of the sewing machine of the first embodiment, the X-direction drive motor 11
The frame 113 can be accurately moved in accordance with the rotation direction and the rotation amount of the gears 8 and 118. Moreover, when the X-direction drive motors 118, 118 are rotated at high speed, the frame 113 can follow the rotation accurately and reliably.

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) Four or more Y-direction drive mechanisms 8 are provided. (2) The X-direction drive mechanism 10 is provided below the table 3,
A slit extending in the X direction is provided through the table 3, and the X-direction driving mechanism 10 is connected to the frame 1 of the driving frame 11 through the slit.
4 and a frame 14 of the drive frame 11 is provided on the base 9 of the drive frame 11 so as to be relatively slidable in the X direction.

(3) In each embodiment, instead of the front side (3b) of the table 3 in front of the bed 7 being configured to be able to descend, the front side is configured to be removable.

(4) In the first to fourth embodiments, the frame holder arm portion 12a is detached from the frame holder main body 12, and a plurality of beds 7 are processed in place of the sewing frame 13 for each bed 7. Attach and use a rectangular frame-shaped sewing frame that holds the cloth.

(5) In the fifth to seventh embodiments, the first to
As in the fourth embodiment, the frame portions 73, 93, 113 of the drive frame
A sewing frame on which a work cloth is individually stretched for each sewing head via a frame holder arm.

(6) In each of the embodiments, the Y-direction drive mechanism 8 is replaced with a structure employing a pair of pulleys and a drive belt. A movable part having a female screw part to be screwed to the feed screw is adopted.

[0058]

As described above in detail, the sewing machine according to the first, second and fifth aspects of the present invention has an excellent effect that the drive frame can be driven with high accuracy.

In addition to the above effects, the sewing machine according to the third, fourth and sixth aspects of the present invention ensures a sufficient range of movement of the drive frame to the rear without increasing the width of the sewing machine in the front-rear direction. Can be.

In addition to the above effects, according to the sewing machine of the present invention, it is easy to drive the drive frame at high speed, accurately, or with a low driving force. become.

In addition to the above effects, according to the sewing machine of the eighth aspect, the frame portion can be moved accurately and at high speed.

[Brief description of the drawings]

FIG. 1 is a plan sectional view showing a sewing machine according to a first embodiment of the present invention, and is a sectional view taken along line II of FIG.

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

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

FIG. 4 is a plan sectional view of a sewing machine according to a second embodiment of the present invention, which is similar to FIG.

5 is a plan sectional view of a sewing machine according to a third embodiment of the present invention, and is a sectional view taken along line VV of FIG. 6;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a plan sectional view of a sewing machine according to a fourth embodiment of the present invention, which is similar to FIG.

FIG. 8 is a perspective view showing a part of a sewing machine according to a fifth embodiment of the present invention.

FIG. 9 is a perspective view showing a part of a sewing machine according to a sixth embodiment of the invention.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

FIG. 11 is a perspective view showing a part of a sewing machine according to a seventh embodiment of the invention.

FIG. 12 is a plan view of a conventional sewing machine.

[Explanation of symbols]

 Reference Signs List 1 sewing machine 3 table 4 first upper frame 5 second upper frame 8 Y-direction drive mechanism 11 drive frame 17 rail 18 movable section 19 drive section 40 sewing machine 42 sewing machine 48 sewing machine 70 sewing machine 71 drive frame 72 base 73 frame section 74 X-direction drive Mechanism 79 X-direction drive motor 80 Torque transmission shaft 81 X-direction drive pulley 82 X-direction transmission unit 90 sewing machine 91 drive frame 92 base 93 frame unit 94 X-direction drive mechanism 97 X-direction transmission unit 110 sewing machine 111 drive frame 112 base 113 frame unit 114 X-direction drive mechanism 116 X-direction feed screw screw 117 X-direction movable portion 117a Female screw portion 118 X-direction drive motor

Claims (8)

[Claims] 1. A drive frame mounted on a table of a sewing machine, and at least two Y frames disposed in the left and right direction of the sewing machine for driving the drive frame in the front-rear direction of the sewing machine.
A sewing machine provided with a directional drive mechanism, an upper frame provided on the table, wherein all the Y-direction drive mechanisms extend in the front-rear direction of the sewing machine provided on the upper frame; A sewing machine, comprising: a movable portion slidably provided in the front-rear direction of the sewing machine, connected to the drive frame, and a drive portion for driving the movable portion in the front-rear direction of the sewing machine. 2. The apparatus according to claim 1, further comprising two Y-direction driving mechanisms.
The sewing machine according to claim 1, wherein the directional drive mechanism is disposed inside left and right ends of the drive frame when viewed from a plane. 3. The Y-direction drive mechanism is configured such that the rear end of the Y-direction drive mechanism is floated from the table so as not to limit the movement of the drive frame to the rear of the sewing machine. The sewing machine according to claim 1, wherein 4. The at least one Y-direction drive mechanism is disposed inside left and right ends of the drive frame when viewed from a plane, and does not restrict movement of the drive frame to the rear of the sewing machine. 2. The sewing machine according to claim 1, wherein the rear end of the Y-direction drive mechanism is floated from the table. 5. A table comprising two Y-direction drive mechanisms, wherein the table is configured such that a front side in front of the bed can be lowered or removed, and each of the Y-direction drive mechanisms is a front side of the bed when viewed from a plane. 2. The sewing machine according to claim 1, wherein the sewing machine is disposed inside both right and left ends of the section. 6. The table, wherein a front side portion of the bed in front of the bed is configured to be able to be lowered or removed, and at least one of the Y-direction drive mechanisms is located inside left and right ends of the front side portion of the bed when viewed from a plane. And a rear end portion of the Y-direction drive mechanism is arranged to be floated from the table so as not to restrict movement of the drive frame to the rear of the sewing machine.
The described sewing machine. 7. A base portion of a drive frame extending in the left-right direction of the sewing machine connected to the Y-direction drive mechanism, and a frame portion of the drive frame provided on the base portion so as to be slidable in the left-right direction of the sewing machine.
An X-direction drive mechanism for driving the frame in the left-right direction of the sewing machine; the X-direction drive mechanism includes an X-direction drive motor supported by a sewing machine frame, and front and rear of the sewing machine connected to the X-direction drive motor. A torque transmission shaft extending in the direction, and an X provided so as to be capable of transmitting torque to the torque transmission shaft and slidably forward and backward.
And a X-direction drive pulley which converts the torque of the X-direction drive pulley into a left-right drive force of the sewing machine and transmits the force to the frame portion.
A direction transmitting part, and the base has one end side extending along the torque transmitting axis.
The sewing machine according to any one of claims 1 to 6, wherein the sewing machine is supported so as to slide back and forth with the directional drive pulley, and the other end is slidable back and forth along a slide guide member extending in the front and rear direction of the sewing machine. . 8. A base portion of a drive frame extending in the left-right direction of the sewing machine, the base portion being connected to the Y-direction drive mechanism and supported by a sewing machine frame so as to be slidable in the front-rear direction of the sewing machine. A frame portion of a drive frame slidably provided, and an X-direction drive mechanism for driving the frame portion in the left-right direction of the sewing machine. The X-direction drive mechanism is rotatably supported by the base portion of the sewing machine. An X-direction feed screw screw extending in the left-right direction; and a female screw portion connected to the frame portion and screwed to the X-direction feed screw screw. 7. An X-direction movable part that moves in a direction, and an X-direction drive motor that rotationally drives the X-direction feed screw screw.
The sewing machine according to any one of the above.