JP2007111203A - Sewing frame driving device for sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To extend an x-directional rail without widening the in-between interval of y-directional rails. <P>SOLUTION: This sewing frame driving device 9 for a sewing machine comprises an x-directional driving mechanism 10 and a y-directional driving mechanism 30 shown below. That is, for the y-directional driving mechanism 30, a y-directional driving fame 31a which goes along an x edge 41a, and at the same time, protrudes outside from one of y edges 42a is connected with one of the x edges 41a of the sewing frame 40, and at least one of the y-directional rails 32 which drive the y-directional driving frame 31a is arranged outside of one of the y edges 42a. Also, for the x-directional driving mechanism 10, the x-directional driving frame 11 which goes along the y edge 42a, and at the same time, protrudes forward and rearward from both x edges 41a and 41b is connected with one of the y edges 42a, and a pair of the x-directional rails 22 which drive the x-directional driving frame 11 are arranged forward of the front end and rearward of the rear end of the y-directional rail 32 which is arranged outside. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sewing frame driving device for a multi-head sewing machine that drives a sewing frame for expanding and holding a workpiece.

  A multi-head sewing machine generally includes a quadrangular sewing frame that extends long in the x direction, which is a parallel arrangement direction of the sewing heads, and a drive device that drives the sewing frame. The drive device includes an x-direction rail for driving the sewing frame in the x-direction and a y-direction rail for driving in the y-direction orthogonal to the x-direction, and the sewing frame is directly connected to both rails. There are many.

However, in the drive device as described above, the vicinity of the corner of the sewing frame cannot be supported, and the vicinity of the corner is easily distorted. This is because, if the rail is directly connected near the corner of the sewing frame, it becomes an obstacle when the sewing frame is driven in a direction orthogonal to the length direction of the rail. Therefore, in some cases, like the driving device 90 of the conventional example shown in FIG. 3, the x side 96a of the sewing frame 95 extends along the x side 96a and outward from the one y side 97a. By connecting the protruding y-direction drive frame 92 and connecting the y-direction drive frame 92 to the y-direction rail 93, the vicinity of the corner is connected to the y-direction rail 93 via the y-direction drive frame 92, making it difficult to distort. There is a thing (patent document 1). At this time, at least one of the y-direction rails 93 to which the y-direction drive frame 92 is connected is disposed outside the one y-side 97a. Therefore, in order to prevent the y-direction rails 93 and the x-direction rails 91 arranged outside from coming into contact with each other, here, some of the x-direction rails 91 are connected to the endmost y-direction rail 93 and its adjacent one. It is disposed between the y-direction rail 93 and the y-direction rail 93.
JP 2001-129280 A

  Since the sewing frame of a multi-head sewing machine is long in the x direction, there is a lot of room in the x direction for expanding each area that can be sewn by each sewing head in the sewing frame, and the actual stroke in the x direction is also provided. In some cases, it is preferable to enlarge the area in the x direction by increasing the value, but in this case, there are the following problems. That is, when the x-direction rail 91 is disposed between the y-direction rails 93 as in the conventional driving device 90, the x-direction rail 91 and the y-direction rail 93 cannot cross each other. The length of the x-direction rail 91 disposed between the direction rails 93 cannot be longer than the mutual interval w3 between the two y-direction rails 93. Further, if the mutual interval w3 is increased, the x-direction rail 91 can be lengthened. However, depending on the length setting of the x-direction rail 91, the mutual interval w3 becomes too wide, and the support is not provided at that portion. It is considered that the sewing frame 95 becomes stable and easily distorted.

  Therefore, an object is to lengthen the x-direction rails without increasing the mutual distance between the y-direction rails.

  In order to achieve the above object, a sewing frame driving apparatus for a sewing machine according to the present invention is a sewing frame driving apparatus for a sewing machine that drives a quadrangular sewing frame in the x and y directions by an x direction driving mechanism and a y direction driving mechanism. The y-direction drive mechanism connects, to at least one x side of the sewing frame, a y-direction drive frame that extends along the x side and protrudes outward from at least one y-side. At least one of the y-direction rails to be driven is disposed outward from the one y-side, and the x-direction drive mechanism extends along at least the one y-side and along at least the one x-side. An x-direction drive frame that protrudes outward from the side is connected, and the pair of x-direction rails that drive the x-direction drive frame is more than the front end of the y-direction rail disposed outward from the one y-side. Arranged behind the front and rear ends It is characterized in. However, there may be two or more x-direction rails and y-direction rails, respectively. When there are three or more x-direction rails, the pair of x-direction rails is any two adjacent ones. Refers to the x-direction rail. Further, protruding outward means that the sewing frame may be protruded outward while being driven, and disposing outwardly means that the sewing frame is outwardly driven while the sewing frame is being driven. It is said that it is arranged at a certain position. The same applies to the following.

  The mutual distance between the pair of x-direction rails is not particularly limited, but is preferably larger than the mutual distance between both x sides of the sewing frame. This is because the y-direction rails up to the length necessary for moving the portion from the end in the y-direction side in the sewing frame to the needle drop point can be disposed therebetween. The x-direction drive frame is not particularly limited, but it is preferable that the x-direction drive frame protrudes forward and backward from both x sides. This is because the x side is more difficult to distort.

  According to the present invention, since the x-direction rail is disposed in front of the front end of the y-direction rail and rearward of the rear end, even if the x-direction rail is longer than the mutual interval between the y-direction rails, There is no contact between the directional rail and the y-directional rail. Therefore, the x-direction rail can be lengthened without increasing the mutual interval between the y-direction rails.

  The sewing frame drive device 9 for a sewing machine according to the present invention is a device that drives a quadrangular sewing frame 40 in the x and y directions by the following x direction drive mechanism 10 and y direction drive mechanism 30. In other words, the y-direction drive mechanism 30 connects the one x-side 41a of the sewing frame 40 to the y-direction drive frame 31a that extends along the x-side 41a and protrudes outward from the one y-side 42a. At least one of the y-direction rails 32 that drive the frame 31a is disposed outward from the one y-side 42a. Further, the x-direction drive mechanism 10 connects the one x-side drive frame 11 to the one y-side 42a along the y-side 42a and protrudes forward and backward from both the x-sides 41a and 41b. The pair of x-direction rails 22 that drive the frame 11 are disposed forward and rearward of the front end of the y-direction rail 32 disposed outward of the one y-side 42a.

  The multi-head sewing machine 6 of this embodiment includes a plurality of sewing heads 7 arranged side by side in the horizontal direction, a bed 8 installed at a portion including a needle drop point P below the tip of each sewing head 7, and a sewing product. The sewing frame 40 includes a sewing frame 40 that stretches and holds (not shown), and a sewing frame drive device 9 that drives the sewing frame 40 in the horizontal plane direction. These constituent elements 7, 8, 9, and 40 are attached to a sewing machine frame 6 a that is a base of the multi-head sewing machine 6. A table 6b is attached to the upper surface of the sewing machine frame 6a. In the following, the parallel direction of the sewing heads 7 in the horizontal plane direction is defined as the x direction, and the direction orthogonal to the x direction is defined as the y direction.

  The sewing frame 40 is a rectangular frame that extends relatively long in the x direction, and is supported by the sewing frame driving device 9 so as to be driven in two directions, the x direction and the y direction. The sewing frame 40 includes both x sides 41a and 41b extending in the x direction as both long sides, and both y sides 42a and 42b extending in the y direction as both short sides.

  The sewing frame driving device 9 drives the sewing frame 40 in two directions, the x direction and the y direction, to sequentially move the sewing position of the sewing object (not shown) to the needle drop point P below the tip of the sewing head 7. And is installed through the table 6b from the bottom to the top of the table 6b. The sewing frame drive device 9 includes an x-direction drive mechanism 10 that drives the sewing frame 40 in the x direction, and a y-direction drive mechanism 30 that drives the sewing frame 40 in the y direction.

  The x-direction drive mechanism 10 is a device for driving the sewing frame 40 in the x direction while allowing the sewing frame 40 to move in the y direction, and one y side 42a is connected. The x-direction drive mechanism 10 includes an x-direction drive frame 11 that supports the y side 42a so as not to be relatively movable in the x direction and relatively movable in the y direction, and an x-direction rail that drives the x-direction drive frame 11 in the x direction. 22 and an x-direction conveyor 23.

  The x-direction drive frame 11 is a single frame that runs along the one y-side 42a of the sewing frame 40 and protrudes forward and backward from both the x-sides 41a and 41b, and is connected to the one y-side 42a via the coupling mechanism 12. It is slidably connected in the y direction and is slidably connected to the x direction rail 22 via the slide base 16. The coupling mechanism 12 has a top plate portion 14 that protrudes from the upper portion of the side surface on the y side 42 a side of the x-direction drive frame 11 to the y side 42 a side, and a downward projection on the lower surface of the tip of the top plate portion 14. The connecting rail 13 is formed, and includes a pair of nipping rollers 15 that are slidably attached to the y side 42a and slidably hold the connecting rail 13 from both sides. The slide base 16 is a member whose lower end is slidably connected to the x-direction rail 22 and whose upper end is connected to the lower end of the x-direction drive frame 11.

  The x-direction rails 22 are a pair of rails for slidably mounting the x-direction drive frame 11 in the x direction, and are attached to the sewing machine frame 6a below the table 6b. The length of the x-direction rail 22 is longer than the y-direction rail 32 of the y-direction drive mechanism 30 and the interval w3 where the y-direction rail 32 is arranged in parallel, and each x-direction rail 22 is longer than one y side 42a. Are also disposed forward of the front end of the y-direction rail 32 disposed outward and rearward of the rear end. Further, the mutual interval w1 between both the x-direction rails 22 is larger than the mutual interval w2 between both the x sides 41a and 41b of the sewing frame 40.

  The x-direction conveyor 23 is a mechanism for driving the x-direction drive frame 11 along the x-direction rail 22 in the x-direction. The x-direction conveyor 23 exists for each x-direction rail 22 and is attached to the sewing machine frame 6a. Yes. Each x-direction conveyor 23 is connected to a driving motor 27 serving as a power source via a transmission member 28 and can be driven to rotate, a driven pulley 24 that rotates following the driving pulley 24, A driving belt 26 is provided between the pulleys 24 and 25 and connected to the slide base 16. Further, a cover 29 having a slit hole extending along the x-direction rail 22 is attached to the table 6 b above the x-direction conveyor 23.

  The y-direction drive mechanism 30 is substantially the same as the x-direction drive mechanism 10 with the x-direction and y-direction interchanged, and includes a y-direction drive frame 31, a y-direction rail 32, and a y-direction conveyor 33. However, it is different from the x-direction drive mechanism 10 in the following points. That is, the y-direction drive mechanism 30 includes a first y-direction drive frame 31a that extends along the x side 41a and protrudes outward from the one y side 42a to the one x side 41a of the sewing frame 40, and the x side. A second y-direction drive frame 31b is connected along the line 41a and protruding outward from the other y-side 42b.

  A plurality of y-direction rails 32 are juxtaposed in the x-direction with an interval w3. Each y-direction rail 32 has one x-side 41a, a first y-direction drive frame 31a, or a second y-direction rail. Any one of the direction drive frames 31b is connected to be slidable in the y direction. At least one y-direction rail 32 that drives each y-direction drive frame 31a, 31b is disposed outward from each y-side 42a, 42b. The length of the y-direction rail 32 is substantially equal to the mutual interval w2 between the two x sides 41a and 41b of the sewing frame 40, and the parallel interval w3 of the y-direction rail 32 is the length of the x-direction rail 32. It is shorter than that.

  According to the present embodiment, the pair of x-direction rails 22 are disposed on the front side and the rear end of the y-direction rail 32 disposed on the outer side of one y-side 42a. Therefore, even if the x-direction rail 22 is longer than the mutual interval w3 of the y-direction rail 32, the x-direction rail 22 and the y-direction rail 32 do not contact each other. Therefore, the x-direction rail 22 can be lengthened without increasing the mutual interval w3 between the y-direction rails 32. Therefore, the drive range in the x direction of the sewing frame 40 can be expanded while making the sewing frame 40 difficult to be distorted. Also in the driving range in the y direction, the length of the y direction rail 32 is substantially equal to the mutual interval w2 between the x sides 41a and 41b, and therefore the range from the end of the sewing frame 40 on the y direction side to the end is almost the same. All of them can be moved to the needle drop point P.

  Further, according to the embodiment, if necessary, in order to increase the strength, the y-direction rails 32 may be further added between the y-direction rails 32, or the mutual interval w3 between the y-direction rails 32 may be reduced. It is also possible to increase the number of rails 32. The x-direction rails 22 must be arranged with a space w1 so that the y-direction rails 32 can be installed between the x-direction rails 22. The length of the y-direction rails 32 is the length of both x sides 41a and 41b. This is not a problem because the distance is about w2 and is small.

  In addition, this invention is not limited to the said Example, In the range which does not deviate from the meaning of invention, it can change suitably and can be actualized.

It is a top view which shows the sewing frame drive device of the Example of this invention. (A) which shows the x direction drive mechanism of the Example is a top view, (b) is a side view (sectional view). It is a top view which shows the drive device of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 9 Sewing frame drive device 10 X direction drive mechanism 11 X direction drive frame 22 X direction rail 30 Y direction drive mechanism 31a Y direction drive frame 32 Y direction rail 40 Sewing frame 41a One x side 42a One y side

Claims (1)

In a sewing frame driving device for a sewing machine that drives a quadrangular sewing frame in the x and y directions by an x direction driving mechanism and a y direction driving mechanism,
The y-direction drive mechanism connects, to at least one x side of the sewing frame, a y-direction drive frame that extends along the x side and protrudes outward from at least one y side, and drives the y-direction drive frame. At least one of the y-direction rails is disposed outward from the one y-side, and the x-direction drive mechanism is along at least the one y-side along the y-side and at least from the one x-side. And a pair of x-direction rails for driving the x-direction drive frame, and a front side of a front end of the y-direction rail disposed outward from the one y side. A sewing frame drive device for a sewing machine, which is disposed behind the rear end.

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