JPH0718376Y2 - Sewing equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically sewing a futon, a futon cloth or the like.

[0002]

2. Description of the Related Art A stand frame is provided with a horizontal upper and lower frame, a plurality of sewing machine heads are provided on the upper frame in the length direction thereof, and a sewing machine hook corresponding to the sewing machine head is provided on the lower frame. Various sewing devices have been devised which are provided with a portion (including a sewing machine shuttle portion, the same applies hereinafter) and sew the material to be sewn between the sewing machine head portion and the sewing machine hook portion.

These sewing machines are very efficient because a plurality of rows of sewing lines can be obtained at a time by a plurality of sewing machine heads and a sewing machine hook section.

By the way, in this sewing machine, if the sewing machine head and the sewing machine hook portion can be moved in the longitudinal direction of the frame, the sewing pattern can be changed. For this reason,
Conventionally, various means have been devised as the moving means. For example, there is a technique described in Japanese Patent Laid-Open No. 60-142887.

According to this described technique, a plurality of sewing machine heads and shuttles are movably provided in the lengthwise direction of the frame, and a screw shaft along the frame is screwed on the bases of the respective sewing machine heads and shuttles. By passing through and rotating the screw shaft, each sewing machine head and hook portion are simultaneously moved in the X-axis direction.

However, since the nut of the sewing machine head and the hook portion are fitted to the screw shaft by the nut member fixed to the base, once the screws are fitted, the distance between the sewing machine head and the hook portion is increased. However, there is a problem that it is fixed and the interval cannot be easily changed.

Therefore, the applicant of the present application has filed Japanese Patent Application Laid-Open No. 2-265.
As disclosed in Japanese Patent Publication No. 90, in the sewing device provided with the above-mentioned screw shaft, a technique has been proposed in which each nut can be rotated and fixed. This sewing machine can move each sewing machine head / hook portion individually by rotating each nut individually.

However, since the rotation / fixing means of each nut is performed by the motor, accurate positioning of the motor is required to position each sewing machine head / hook portion, which is costly.

In view of the above points, an object of the present invention is to make it possible to accurately rotate and fix each nut with a simple structure.

[0010]

In order to solve the above problems, according to the present invention, in the sewing machine disclosed in the above-mentioned publication, the sewing machine head base and the sewing machine hook base are moved toward and away from the nuts. Possible stopper pins are provided respectively, and each nut is formed with engaging holes into and out of which the stopper pin comes in and out at equal angular intervals in the circumferential direction.

In this structure, at least one of the upper and lower frames can be provided with a measuring tool for checking the position of the sewing machine head and the sewing machine hook portion in the lengthwise direction, and the upper and lower screw shafts are synchronized. It should be rotatable.

[0012]

In the sewing apparatus according to the present invention thus constructed, the stopper pin is pulled out from the locking hole and the nut is rotated to move the sewing machine head base and the sewing machine hook base on the screw shaft, Set each machine head and machine hook to the required positions and intervals. At this time, since the movement is performed by the screw connection, the accuracy thereof is high and the sewing machine head and the sewing machine hook section can be easily and surely corresponded to each other. Further, if there is a measuring tool for position confirmation, the positioning of the measuring tool and the correspondence between the sewing machine head and the sewing machine hook section become more reliable.

When the positioning of the sewing machine head and hook section is completed,
Insert the stopper pin into the corresponding locking hole and fix the nut to the base. The suturing action is performed in this state. At this time, if you rotate the upper and lower screw shafts in synchronization,
The hook portion moves at the same time and moves in the X-axis direction.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, horizontal upper and lower frames 3 and 4 are provided between stand frames 1 and 2 which are erected to face each other. The front of the upper frame 3 and the lower frame 4
Rails 5 and 6 in the lengthwise direction are provided on the upper surface of the sewing machine, and the bases 7 of the sewing machine heads 15 or the bases 8 of the sewing machine hook portions 25 are movably attached to the rails 5 and 6, respectively. (See FIGS. 2 and 3).

Between the stand frames 1 and 2, the spline-shaped machine head and hook drive shafts 9 and 10 and the screw shaft 1 are provided.
1, 12 are provided along the frames 3, 4. The drive shafts 9 and 10 include a fixed bearing 17a and a movable bearing 17b.
Also, it is rotatably supported via a movable bearing (not shown) in the base 8 and is rotated at the same speed by the sewing motor 13. Both ends of the screw shafts 11 and 12 are support members 11
It is supported by a and 12a. The movable bearing 17b moves on the rail 5.

As shown in FIGS. 2 to 5, screw shafts 11 and 1 are provided on the sewing machine head base 7 and the sewing machine hook base 8 respectively.
A nut 35 screwed into 2 is rotatably provided via a bearing 36, and a gear 34 is screwed to the nut 35. The gear 34 and the nut 35 constitute the nut and the locking hole described in the claims of utility model registration. In addition, a stopper pin 28 facing the gear 34 is provided on the machine head / hook portion base 7, 8 and the gear 34 is engaged with the stopper pin 28 by engaging the pin 28 with the gear 34.
That is, the nut 35 is fixed.

Therefore, the stopper pin 28 and the gear 3
4 is disengaged and the nut 35 is turned to move the sewing machine head base 7 and the sewing machine hook portion base 8 on the screw shafts 11 and 12 to obtain each sewing machine head 15 and the sewing machine hook portion 25. Position and space. This adjustment is
This is performed based on the scale plate 21 provided on the upper and lower frames 3 and 4.
Further, the screw pitch of the screw shafts 11 and 12 and the tooth pitch of the gear 34 (interval between the locking holes) are appropriately selected according to the allowable accuracy of positioning. For example, one rotation of the nut 35 causes the bases 7 and 8 to move by 1 cm.

The stopper pins 28 of the sewing machine head base 7 and the sewing machine hook portion base 8 are supported by a cylindrical guide 31 as shown in FIGS. 4 to 6 and are urged by a spring 37 toward the gear 34. And cylindrical guide 3
When the protrusion 28a is inserted into the deep slit 31a of 1, the stopper pin 28 is engaged with the gear 34 by the spring 37,
On the other hand, by pulling up and rotating, the projection 2 is formed in the shallow slit 31b.
When 8 is inserted, the stopper pin 28 is kept disengaged from the gear 34.

The stopper pin 28 is engaged with the gear 34, and the sewing machine head / hook portion 15 and 25 are screwed into the screw shafts 11 and 12.
The sewing machine head 15 and the sewing machine hook portion 2 are fixed to the
An object to be sewn a is interposed between the sewing machines 5, and sewing is performed by driving the sewing machine head 15 and the shuttle 25. Sewn item a
Is stretched on a tension frame (not shown), and the tension frame is provided on a well-known movable frame. This movable frame is moved by rotating a screw shaft in the XY axis directions by an NC control motor, The stitching pattern is determined by the movement. The movable frame can be moved by a pattern rail instead of the screw shaft movement (movement by the screw shaft and the pattern rail is JP 61-21675).
(See the example described in the publication).

In the above embodiment, the screw shafts 11 and 12 are made non-rotatable. However, if the screw shafts 11 and 12 can be rotated synchronously by a motor, the sewing machines can be rotated by rotating the screw shafts 11 and 12. The head 15 and the shuttle 25 move in the X-axis direction. Therefore, the sewing machine head 1 in the Y-axis direction and the sewing machine head 1
An arbitrary stitch pattern can be obtained by moving the 5 and the shuttle 25 in the X-axis direction. At this time, it goes without saying that the movable frame motor and the sewing machine head 15 / hook 25 motor are NC controlled.

Further, the nut 35 is formed in a polygonal shape, and locking holes are formed on the outer peripheral surfaces of the nuts 35. The positions of the bases 7 and 8 are adjusted by the angular intervals of the locking holes in the circumferential direction. Good. For example, in the case of the square nut 35, four locking holes are formed on the outer surface, and if one rotation of the nut 35 causes the bases 7 and 8 to move 1 cm, the rotation interval of 90 degrees is 0.2
It will be possible to adjust in units of 5 cm. Further, the stopper pin 28 and the nut 35 may be locked not on the outer peripheral surface of the nut 35 but on the front and rear surfaces (the left and right surfaces in FIG. 4). In this case, the stopper pin 28 may be in the left-right direction.

[0022]

[Effects of the Invention] The present invention is configured as described above, and the space adjustment nuts provided on the sewing machine head base and the sewing machine hook base can be rotated and fixed by the action of the stopper pin, so that the structure is simple. Thus, the position of each sewing machine head and each sewing machine hook can be changed easily and accurately.

[Brief description of drawings]

FIG. 1 is a schematic front view of an embodiment of a sewing device according to the present invention.

2 is an enlarged view of the sewing machine head and hook portion of FIG.

FIG. 3 is a right side view of FIG.

4 is an enlarged cross-sectional view of the main part of FIG.

5 is an enlarged cross-sectional view of the main part of FIG.

6 is a perspective view of an essential part of FIG.

[Explanation of symbols]

 1, 2 Stand frame 3 Upper frame 4 Lower frame 5, 6 Rail 7 Sewing machine head base 8 Sewing machine hook base 9 Sewing machine head drive shaft 10 Sewing machine hook drive shaft 11, 12 Screw shaft 13 Sewing motor 15 Sewing machine Head 25 Sewing machine hook 28 Stopper pin 34 Gear 35 Nut a sewn material

Claims (3)

[Scope of utility model registration request] 1. Stand frames 1 and 2 are provided with horizontal upper and lower frames 3 and 4, and said upper frame 3 is provided with a plurality of sewing machine heads 15 in its length direction, and lower frame 4 is provided.
Is provided with a sewing machine hook portion 25 corresponding to the sewing machine head 15, and the sewing machine a is sewn between the sewing machine head 15 and the sewing machine hook portion 25. The sewing machine head 15 and the sewing machine hook portion 25 are each movable in the length direction of the machine, and screw shafts 11 and 12 are provided along the upper and lower frames 3 and 4, respectively. A nut 3 rotatably provided on each sewing machine head base 7 and sewing machine hook base 8.
5 are respectively threaded, and stopper pins 28 capable of advancing and retracting toward the respective nuts 35 are provided on the sewing machine head base 7 and the sewing machine hook portion base 8, and each of the nuts 35 has the stoppers at equal angular intervals in the circumferential direction. A sewing device having a locking hole through which the pin 28 comes in and out. 2. At least one of the upper and lower frames,
2. The sewing device according to claim 1, further comprising a measuring tool 21 for checking the position of the sewing machine head 15 and the sewing machine hook portion 25 in the lengthwise direction. 3. The sewing device according to claim 1, wherein the upper and lower screw shafts 11 and 12 can be rotated in synchronization with each other.