JPH0341661Y2 - - Google Patents

Description

[Detailed description of the invention] 3-1 Purpose of the invention 3-1-1 Industrial field of application The invention related to this utility model registration application (hereinafter referred to as the claimed invention) is intended for use as sleeves of clothing, etc. The actuator operates to guide the end of the cloth tube or plain cloth when feeding the cloth tube sewn into a tube shape in advance or one end of the flat cloth folded into an S-shape to the sewing section of the sewing machine. The present invention relates to a control technique for a fabric guide device configured to be able to operate.

3-1-2 Conventional technology Conventionally, for example, U.S. Patent No. 2952227
As in the invention described in the No. 1 patent, one end of a flat cloth 1 placed horizontally is folded into an S-shape 2 and fed into the sewing section of an overstitch sewing machine where a chain seam 3 is formed. An overedge seam is formed by covering the edge of the upper edge of the S-shaped bent portion at one end, and the seam accurately passes through the middle inside of the fabric at the bent portion between the middle edge and the lower edge. To perform so-called hem stitching, as shown in Fig. 3, a U-shaped fabric guide 4 is always placed horizontally with the opening facing right, and its upper side 5 is placed at the folded part of the fabric. 2, and its lower side 7 is located inside the bent part 10 of the middle edge 8 and lower edge 9 of the bent part 2,
The fabric 1 was manually bent into an S-shape along these lines and guided, while being fed to the sewing section of the sewing machine located ahead of the fabric guide 4 in the fabric feeding direction.

This conventional fabric guide 4 is suitable for guiding a flat fabric 1, and is used as a whole for inserting, removing, and other handling of the fabric 1 into the fabric guide 4. It was configured to remain stationary in the left-right direction and to rotate about a fixed horizontal axis 11 to an upright position.

However, in order to use it for sleeves of clothing, etc.
As shown in the figure, a flat cloth 12 was sewn 20 at both ends in the opposite direction to form a cloth tube 13, and one end of the cloth tube 13 was bent 14 outward in an S-shape. It has been extremely difficult and almost impossible to guide objects with conventional fabric guides 4.

In other words, the cloth tube 13 is held in a horizontal state, surrounding and supporting the horizontal cylindrical cloth support section 15 (so-called free arm) of the sewing machine having the sewing section, and placed in front of the cloth support section 15 in the cloth feeding direction. Even if an attempt is made to guide the S-shaped bent portion 14 of the fabric tube 13 using the conventional fabric guide 4, the lower side 7 of the fabric guide 4 will not guide the folded portion of the fabric 1 when the fabric guide 4 is positioned horizontally. Since it is configured to be suitable for guiding the inside of the portion 2 while folding it, the lower side 7 of the fabric guide 4 does not move the fabric when it rotates about the rotation axis 11 from upright to horizontal. The bent portion 10 of the tube 13 is engaged with the upper edges 6, 19 of the bent portion 14, and the bent portion 10 is simply pressed downward against the middle and lower edges 8, 17, 9, 16. , 18 cannot be entered.

In order to eliminate this defect, the rotation radius of the fabric guide 4 is made extremely large so that the lower side 7 rotates without contacting the upper edges 6, 19 of the fabric tube 13.
The lower side 7 is the bent part 10, 1 under the cloth tube 1, 13.
Since it is far away to the left from 8, it is impossible to enter inside it, resulting in defects such as cloth guidance becoming impossible.

Furthermore, in order to eliminate the defects of the above-mentioned invention, for example, as in the invention described in U.S. Pat. No. 3,890,911 shown in FIG. a cylinder a that has been made horizontally, a stationary plate b fixed horizontally to the frame of the sewing machine, a cam groove e formed on the stationary plate b and consisting of a horizontal groove c and an inclined groove d that slopes upward to the right; A sliding body f that is slidably supported, a pin h that rotatably connects the piston shaft g of the cylinder a to the sliding body f, and a linear cloth guide j that is fixed to the sliding body and has a hook i at the right end. A system with the following has been proposed.

The invention operates as follows. In other words, the piston shaft g moves horizontally to the right due to the air flowing into the cylinder a, and the sliding body f moves horizontally to the right in the horizontal groove c, then rises diagonally upward to the right along the inclined groove d, and the cloth guide j The right end hook i is positioned diagonally upward to the right as indicated by the two-dot chain line k and stops. Next, make the edge S
Insert the folded cloth 1 which has been folded into a letter shape from below the right end hook i of the cloth guide j to the left into the sewing machine sewing section. Next, when air flows in from the cylinder a, the piston shaft g moves to the left, the sliding body f moves downward diagonally to the left along the inclined groove d, and the cloth guide j moves to the right end hook i as shown by the solid line m. It stops at a horizontal position away from the folded portion n of the folded cloth 1 to the right. As air continues to flow out from the cylinder a, the piston shaft g moves further to the left, the sliding body f moves to the left along the horizontal groove c, and the cloth guide j moves to the right end hook i as shown by the dashed line o. It enters the inside of the lower folded part p of the folded cloth 1 and stops at a horizontal position.

Therefore, in this invention, when the cloth guide j rotates downward, the hook i does not come into contact with the folded portion n of the folded cloth 1, so that the defect of the previous invention shown in FIG. 3 can be solved, but The movement path of cloth guide j is cylinder a
Because it is restricted by the horizontal movement of the piston shaft g, the horizontal groove c of the cam groove e, and the inclined groove d that rises diagonally to the upper right, cloth guide j has its hook i positioned slightly diagonally to the upper right. In this state, if you try to insert or take out the folded cloth 1 whose edge is bent into an S-shape from the seam, there will be a needle and a fabric presser above the seam, as well as a cloth guide. Since the hook i is located very narrowly, it becomes an obstacle to manual operation of the folded cloth 1.
This creates a defect that makes it extremely difficult to put on and take off.

3-1-3 Problems to be solved by the invention This invention uses two air cylinders 31 and 35 linked to the fabric guide 21 to perform horizontal forward/reverse movement and forward/reverse rotation, respectively. By doing so, after moving the fabric guide tool 21 to the left, it is rotated downward so that it does not come into contact with the folded part 14 of the sleeve cloth 13,
Next, move the fabric guide 21 to the right and
8 and make contact with each other, and after sewing the bent part 18 and the cloth end, the fabric guide 21 is moved to the left and then rotated upward to separate from the bent part 18 of the tube cloth 13. The purpose of this invention is to eliminate the deficiencies of the above two inventions.

3-2 Structure of the invention 3-2-1 Means for solving the problem 3-2-1-1 Structure of the invention An example of the structure of the invention of the present application will be explained as follows with reference to the drawings. be.

The frame 24 of the sewing machine includes a needle 25 that holds the upper thread and moves up and down, a presser foot 26 that presses down the fabric tube 13 by receiving a downward elastic force, and a presser foot 26 located directly below the needle 25 that allows the needle 25 to penetrate the fabric. A thread ring catcher such as a looper that operates to catch the upper thread ring generated by friction with the cloth during the subsequent rise to form an overlock seam at the edge of the cloth, and a thread ring catcher located directly below the presser foot 26 and cooperating with the presser foot 26. A sewing section of the sewing machine is formed in the frame 24 by supporting a feed dog 28 that protrudes and retracts from the fabric support body 15 and moves back and forth so as to nip and feed the fabric tube 13 forward along a straight line in FIG. do.

Further, a cloth support 15 (so-called free arm) is integrally formed on the frame 24 and extends horizontally to the left in a cylindrical shape from the stitched portion at the right base, and a substrate 30 is fixed to the front.

An air cylinder 31 that supplies and discharges air in one direction and the opposite direction to move an internal piston left and right is fixed to the base plate 30, and a rod 32 is fixed to the left end of the piston. Mobile body 33
A guide body 34 that covers and guides the movable body 33 so that the movable body 33 moves left and right along a straight line.
is fixed to the substrate 30.

An air cylinder 35 that supplies and discharges air in one direction and the opposite direction to move an internal piston left and right is fixed to the moving body 33, and a rod 36 is fixed to the left end of the piston. The joint 37 that rotatably supports the rod 36 is supported, and the joint 37
The rod 38 is rotatably supported by the rod 38.
At the left end is a joint 39 that allows the rod 38 to rotate.
support.

At the left end of the movable body 33, the right end of the upper side 40 of the U-shaped fabric guide 21 with the opening in the opposite left and right directions is supported so as to be rotatable up and down about a horizontal rotation axis 41. The lower surface of the joint 39 is fixed to the middle of the upper surface of the upper side 40, and the upright side 42 is fixed upright to the middle of the upper surface of the lower side 22.

3-2-2 Effects One embodiment of the configuration of the present invention is as described above, and is configured to produce the effects shown in FIG.

a As shown in FIG.
Stand upright and away from the top.

Then, the cloth tube 13 is fed to the right sewing section 29 without being obstructed by the cloth guide tool 14.

b As shown in Fig. 2B, next, move the rod 32 to the left by supplying air from the right side of the air cylinder 31 and discharging air from the left side to move the internal piston to the left and stop. In conjunction with the movement, the movable body 33 is moved to the left to maintain the fabric guide 21 together with the cylinder 35 in the upright state shown in FIG.
Move to the left and stop.

c As shown in Figure 2C, and keeping the air cylinder 31 in the state shown in Figure 2B, supply air from the right side of the air cylinder 35 and exhaust air from the left side to move the internal piston to the left. By moving the rod 36 to the left together with the joint 37 and then stopping, the rod 38 is moved to the left and the fabric guide 21 is moved through the joint 39 to rotate the rotation shaft 41. It rotates downward in a counterclockwise direction around the center, moves the lower side 22 away from above the base of the cloth tube 13, approaches in parallel with it, and stops.

d As shown in FIG. 2D, next, maintain the air cylinder 35 in the state shown in FIG. The air cylinder 31 is supplied with air from the left, air is discharged from the right, the internal piston is moved to the right and stopped, and the moving body 33 is moved to the right in conjunction with the movement of the rod 32 to the right. By doing so, the piston 35
At the same time, the fabric guide 21 is moved to the right, and the lower side 22 of the fabric guide 21 is inserted between the middle edge 17 and the lower edge 16 of the bent part 14 of the cloth tube 13, and the fabric guide 21 is moved to the right.
8 and stops, the upper side 40 of the cloth guide 21 is located away above the upper edge 19 of the folded part 14 of the cloth tube 13, and the upright side 42 is placed above the upper edge 19.
It comes into contact with the outside of the bend between the middle edge 17 and the middle edge 17 and stops.

As a result, the upper edge 1 of the bent portion 14 of the cloth tube 13
9 has a bent part 1 of the middle and lower edges 17 and 16 at the tip edge.
In this state, the cloth tube 13 is guided to the sewing section 29 of the sewing machine by rotating around the cloth guide 15 in conjunction with the cloth feeding movement. At the same time, so-called hem stitching is performed, which is composed of an overedge stitch 23 that covers the tip end edge of the upper edge 19 of the bent portion 14 and a stitch that passes through the middle of the bent portion 18.

e As shown in Fig. 2E, the rod 32 is moved to the left by supplying air from the right side of the air cylinder 31 and discharging air from the left side to move the internal piston to the left and stop. In conjunction with the movement, the movable body 33 is moved to the left to move the fabric guide 21 together with the cylinder 35 so that the lower side 22 is parallel to the base of the fabric tube 13, as shown in FIG. 2C. Approach and stop.

As a result, the fabric guide 21 is smoothly removed from the fabric tube 13.

f As shown in FIG. 2F, further maintain the air cylinder 31 in the state shown in FIG. By moving, the rod 36 moves to the right together with the joint 37 and then stops, causing the fabric guide 27 to rotate upward clockwise around the rotation shaft 41 via the joint 39. Then, as shown in FIG. 2B, the opening rises to the position of the movable body 33 above the cloth tube 13, stands upright, and stops.

As a result, the fabric guide 21 rises and stands upright without lifting the bent portion 14 of the fabric tube 13.

g As shown in Figure 2G, finally, by supplying air from the left side of the air cylinder 31 and discharging air from the right side, the internal piston moves to the right and stops, thereby moving the rod 32 to the right. In relation to the movement, the movable body 33 is moved to the right to maintain the fabric guide 21 in the upright state shown in FIG.
It moves upward and to the right and stops.

Thereby, the cloth tube 13 can be taken out to the left from the stitched portion 29 without being obstructed by the cloth guide tool.

3-3 Effects of the invention This invention has the following effects because it is configured to produce the structure and action described above.

a Fabric guide 2 as shown in Figure 2C and D.
1 is located horizontally on the upper left side, slightly away from the base of the cloth tube 13, and then enters the bent portion 18 horizontally, so it can be moved downward without contacting the upper edge 19 of the bent portion 14. There's no crushing it.

b As shown in Figure 2 E and F, fabric guide 2
1 escapes horizontally to the left from inside the bent portion 18 of the cloth tube 13, so it does not contact the bent portion 14 and does not push it upward.

c As shown in Figure 2 A and G, fabric guide 2
1, the opening part stops far above the folded part 14 of the cloth tube 13 and at a position corresponding to the movable body 33, so the cloth tube 13 can be inserted into and taken out from the sewing part 29 and the cloth guide tool 21. Sometimes there are no obstacles and manual operations for handling cloth can be carried out smoothly and easily.

3-4 Other Embodiments a The upright state of the fabric guide 21 may be inclined slightly to the left or right toward the base of the fabric tube 13 or the cylinder 35 with respect to the vertical line, if necessary.

b The fabric guided by the fabric guide 21 does not need to be cylindrical and may be flat.

c. Instead of the air cylinders 31 and 35, a solenoid operated by electromagnetism may be used.

d The edge of the fabric may be bent in a U-shape.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the entire structure seen from the front left, Fig. 2 is a front view schematically showing the operating state of the fabric and fabric guide when Fig. 1 is viewed from the front, and Figs. 3 and 5 are conventional FIG. 4 is a schematic front view showing the fabric guide, and a horizontal cross-sectional view of a fabric tube, which is an example of the fabric to which the present invention is applied.

Claims (1)

[Scope of claim for utility model registration] A sewing part of a sewing machine that forms a seam while feeding fabric along a straight line in one direction, a board fixed horizontally on the frame of the sewing machine, and a board fixed on the board in the direction of fabric feeding. a first actuating body capable of operating in one direction and the opposite direction perpendicular to the horizontal direction; A movable body that is movable in one direction and the opposite direction perpendicular to the cloth feeding direction, and a second operating body fixed to the movable body and movable in one direction and the opposite direction orthogonal to the cloth feeding direction. , is formed in a U-shape consisting of an upper side, a lower side, and an opening, and the free end of the upper side is rotatably supported on a movable body along an axis parallel to the cloth feeding direction, and the upper part of the upper side is rotated along an axis parallel to the cloth feeding direction. A fabric rotatably supported on a second actuating body by an axis, and erected above the folded portion of the fabric with the opening always facing downward in connection with the reverse direction operation of the first and second actuating bodies. The first and second operating bodies are such that when one operates, the other stops, and sequentially, the former operates in one direction, the latter operates in one direction, and the former operates in the opposite direction. After the suture part stops after forming the seam, the former operates in one direction, the latter operates in the opposite direction, and the former operates in the opposite direction. A timed fabric guide device in a sewing machine.