JP2002177676A - Belt loop feeding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt loop feeding apparatus constituted in such a way that only when a bending guide, etc., are surely elevated, a belt loop feeding action to a sewing machine is performed. SOLUTION: In the belt loop feeding apparatus 30 provided with moving shafts 22 and 22 having forks 22a and 22a bending both end parts of a belt loop to the central side in the longitudinal direction and feeding the belt loop after it is bent to a sewing position and bending guides 17 and 17 which are lowered from an upper waiting position (the position A) to a guide position (the position B) and pinch the neighborhood of both edge parts and guide the bending direction when the belt loop is bent and are elevated to the position A after it is bent, a detecting means consisting of proximity sensors 32 and 35 and detecting members 31 and 34 for detecting that the bending guides 17 and 17 reach a specified height which does not obstruct movements of the moving shafts 22 and 22 to the sewing position after the belt loop is bent is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt loop supply device provided with a bending guide serving as a guide when bending a belt loop.

[0002]

2. Description of the Related Art Conventionally, a belt loop sewing machine that sews a number of belt loops through which a belt is inserted into the waist of a sewing product such as jeans or a skirt has been known. A belt loop supply device for supplying the belt loop to the sewing position of the sewing machine is additionally provided. FIG. 4A shows an example of a conventional belt loop supply device. The belt loop supply device 1 shown here is disposed on the side of the belt loop sewing machine 2. The belt loop sewing machine 2 is, for example, 2
An arm 4 is provided in parallel with the sewing machine bed 3, and two needles 5 are arranged on the arm 4 (in FIG. 4A, the needles are arranged in a line from the front to the back of the drawing). (Only one near side is shown). Then, a sewing product S such as jeans is placed on the bed 3 so as to face the two needles 5.

The belt loop supply device 1 is provided with a moving shaft 22 which is driven in the left and right direction in FIG. 4A by a moving driving means 26 such as an air cylinder. A bifurcated fork 22a for holding a tape material to be a loop is provided. As will be described later, the fork 22a is
3 to bend the tape material. The moving shaft 22 and the fork 22a are shown in FIG.
As shown in (b), two sets are provided. Above the belt supply device 1, a tape material holding means 9 having compression coil springs 18, 18 is provided. In the vicinity of the compression coil springs 18, there are provided bending guides 17, 17 each having a front claw 17a and a rear claw 17b provided at intervals of about the width of the tape material. These two sets of compression coil springs 18 and bending guides 17 are respectively connected to the cylinder 1
0 (only one is shown in FIG. 4A), so that it is driven in the vertical direction. Further, the belt loop supply device 1 is provided with a tape material supply unit (not shown).
The tape material serving as a belt loop is fed from the tape material supply means onto the loop receiving plates 15 and 15 fixed below the tape material holding means 9.

[0004] Belt loop supply device 1 having the above configuration
According to the first, when the tape material is supplied from the tape material supply means onto the loop receiving plates 15, 15, the two sets of the compression coil springs 18 and the bending guides 17 are lowered, and the compression coil springs 18, 18 are moved. The tape material is pressed and held between the receiving plates 15 and 15. Next, the moving shaft 22,
When the forks 22a, 22a of FIG.
It advances from P1) of (a), and clamps the tape material held at the belt loop forming position (P2 of FIG. 4A). The tape material in this state is cut into a predetermined length by cutting means (not shown), and a belt loop R is formed. Next, as shown in FIG.
a is driven by the bending driving means 23 and rotated, and both ends of the belt loop R are bent between the front claws 17a and the rear claws 17b of the bending guide 17.

At this time, in the belt loop supply device 1, both end portions of the tape material are bent by the bending guides 17 between the front claws 17a and the rear claws 17b so as to be along these ends. Since the portion completely overlaps the upper tape material, it can be easily folded without protruding in the width direction.

After that, when the two sets of the compression coil spring 18 and the bending guide 17 rise, the forks 22a, 22
a moves forward and supplies the belt loop R to the sewing position (P3 in FIG. 4A) below the cloth retainer 7. Thereafter, the cloth presser 7 is lowered to press the belt loop onto the sewing product S. In this state, the forks 22a, 22a are pulled out of the belt loop, and the moving shafts 22, 22 are retracted to return to the standby position at the rear. .

In the belt loop supply device 1, the belt loop is supplied by a series of operations as described above.
If there is an error in the middle of a series of operations, when the operator operates on the panel, the forks 22a, 22a release the belt loop R once gripped, retreat to the standby position, and start over from the beginning.

[0008]

However, the belt loop R may not be separated from the forks 22a, 22a in this re-starting operation. In this case fork 2
In 2a and 22a, a new tape material supplied on the receiving plates 15 and 15 is again gripped while holding the belt loop R. The forks 22a, 22a, which have already clamped the belt loop,
Without being able to grasp the new tape material on 15, the bending guide 17 and members around it are pushed through the tape material. Alternatively, the forks 22a, 22a forcibly grasp the tape material in a double manner, and in this state, the tape material is
When the user tries to bend as shown in FIG.
The front claws 17a and the rear claws 17b are forcibly pushed open. When such a situation occurs, the folding guide 17
In addition, the rise of the compression coil spring 18 is hindered or delayed. On the other hand, the driving of the moving shafts 22 and 22 is controlled in accordance with a timer controlled on software, and the moving shafts 22 and 22 move forward toward the sewing machine 2 even when the bending guide or the like remains lowered. At this time, the strong forward force of the forks 22a, 22a causes the rods 10a,
10a (FIG. 1 (b)) may be damaged by being bent, which is a serious problem.

An object of the present invention is to provide a belt loop supply device configured to perform a belt loop supply operation to a sewing machine only when a bending guide or the like is ascended.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 is, for example, as shown in FIG. 1 to FIG. A loop supply means (moving shafts 22, 22) having a bending member (forks 22a, 22a) for bending toward the center in the longitudinal direction and supplying a belt loop after bending to a sewing position; When the belt loop is bent from the upper standby position (position A) to guide both ends of the belt loop by the bending member, both edges perpendicular to the longitudinal direction of the belt loop near the both ends. Almost touching the part,
In a belt loop supply device (30) having a bending guide that guides a bending direction and rises to a standby position after the belt loop is bent, after bending the belt loop, the belt loop is moved to a sewing position of the loop supply unit. Detecting means (proximity sensors 32, 35, detecting members 31, 34) for detecting that the bending guide has risen to a predetermined height so as not to hinder the movement of the bending guide.

According to the first aspect of the invention, after the belt loop is bent by the bending member, the detection means folds the belt loop to a predetermined height so as not to hinder the movement of the loop supply means to the sewing position. Movement to the sewing position by the loop supply means after confirming the detection by the detection means, that is, confirming that the bending guide has risen to a sufficient height, because the rise of the music guide is detected. Can be configured to be performed. With this configuration, in the case where the bending guide cannot be lifted due to some error, the detecting means does not detect that the bending guide has reached the predetermined height, and as a result, the loop supply means Does not move toward the sewing position, so that the loop supply means does not apply excessive force to the bending guide and the members for driving the bending guides, and the members do not break. In addition, the raising of the bending guide and the movement of the loop supply means to the sewing position corresponding thereto have conventionally been performed according to a timer on software. In this case, software must be built with sufficient time. Conversely, loss time is included in advance. However, in the belt loop supply device of claim 1, since it is possible to move the belt loop supply means immediately when it is detected that the folding guide has reached a safe predetermined height, it is provided on software. Loss time is eliminated, and as a result, operation time can be reduced.

According to a second aspect of the present invention, in the belt loop supply device according to the first aspect, a storage means (53) for storing error information, a display means (58) for displaying error information, and a detection means When it is determined from the result of the detection that the folding guide has not risen to the predetermined height, control means (CPU 52) for displaying error information on the display means
It is characterized by having.

According to the second aspect of the present invention, under the control of the control means, when the bending guide has not reached the predetermined height from the detection result of the detection means, error information is displayed on the display means. Therefore, the operator can quickly recognize that an abnormality has occurred in the operation of the belt loop supply device and can respond.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. The belt loop supply device 30 according to the present invention shown in FIGS.
5 and the configuration other than the detection members 31 and 34, FIG.
Is the same as that of the conventional belt loop supply device 1, and the same members as those of the belt loop supply device 1 are denoted by the same reference numerals.

The belt loop supply device 30 is, like the belt loop supply device 1, configured to be capable of reciprocating operation and has two movable shafts (loops) having forks (bending members) 22a, 22a fixed at the ends thereof. Supply means) 22, 2
2 and a tape material holding means 9 for holding the tape material (belt loop) at the belt loop forming position. The tape material holding means 9 includes a fixed frame 33 (FIG. 2), a fixed plate 41 fixed to the fixed frame 33, a moving substrate 42, cylinder supporting substrates 36 and 37, bending guides 17, 17, and a bending guide. Up and down moving cylinder 3 that moves up and down 17, 17, etc.
8, 39, etc.

A movable substrate driving cylinder 40 for driving a movable substrate 42 is mounted on the upper portion of the fixed plate 41. Output rod 40a of the moving substrate drive cylinder 40
Is screwed so as to be screwed into a mounting hole 42b formed in a mounting member 42a mounted on the moving substrate 42. The moving substrate 42 is driven vertically by the moving substrate driving cylinder 40 with respect to the fixed plate 41.

A cylinder support substrate 37 is fixed on the front side of the movable substrate 42. Further, the cylinder support substrate 3
7 is provided with a cylinder support substrate 36. The cylinder support substrate 36 is formed in a horizontally long substantially rectangular shape as shown in FIG. 1 when viewed from the front, and is formed in a U-shape as shown in FIG. 2 when viewed from the side. Cylinder support board 3
Reference numeral 7 denotes a plate-like member having a width smaller than that of the cylinder support substrate 36. The cylinder support board 36 is formed with a horizontally long slot 36c, and is fixed to the cylinder support board 37 via screws 60, 60 inserted into the slot 36c. And
By loosening the screws 60, 60 and moving the cylinder support board 37 in the lateral direction, it is possible to correspond to the length of the belt loop.

A vertically moving cylinder 38 is fixed to the upper horizontal portion 36a of the cylinder support board 36. On the other hand, the compression coil spring 18 is provided below the vertically moving cylinder 38. The compression coil spring 18 is fixed to a lower surface of a coil support member 19 formed in a substantially rectangular parallelepiped. The lower horizontal portion 36b of the cylinder support substrate 36 becomes the receiving plate 15 that supports the tape material supplied from the tape material supply means (not shown) from below. The tape material is held between the receiving plate 15 and the compression coil spring 18.

On the upper surface of the coil support member 19, the tip of an output rod 38a of a vertically moving cylinder 38 is fixed. Further, a detection member 31 made of a metal plate is provided on the upper surface of the coil support member 19. The detection member 31
A detection piece 31b formed in an L-shape when viewed from the side and provided in parallel with the vertical direction;
And a support piece 31a that comes into contact with the upper surface of the support piece 31b and supports the detection piece 31b. The upper right end of the detection piece 31b is an extension 31c extending upward. A round hole (not shown) is formed in the center of the support piece 31a, and the tip of the output rod 38a is fitted in the round hole.

The cylinder support board 37 has a U-shape as viewed from the side, like the cylinder support board 36, and has a vertically movable cylinder 39 mounted on an upper horizontal portion 37a. The members below the vertical cylinder 39 are exactly the same as those on the right vertical cylinder 38 side. That is, the tip of the output rod 39 a of the vertical movement cylinder 39 is fixed to the upper surface of the left coil support member 20. A compression coil spring 18 is fixed to the lower surface of the coil support member 20, and a lower horizontal portion 3 of a cylinder support substrate 37 is provided below the compression coil spring 18.
7b are facing each other. This lower horizontal portion 37 becomes the receiving plate 15. The detecting member 3 is provided on the upper surface of the coil supporting member 20.
4 are provided. The detecting member 34 is provided with the detecting member 3
This is exactly the same as 1 and includes a support piece 34a and a detection piece 34b, and an extension 34c is formed on the detection piece 34b.

The left and right coil support members 19, 20 are provided with bending guides 17, 17 as in the conventional case. Each of the folding guides 17 includes a front claw 17a and a rear claw 17b. Each rear claw 17b is connected to the coil supporting member 1
Each front claw 17a is fixed with respect to 9 and 20.
It is attached so that the position can be changed back and forth according to the width of the tape material. Right folding guide 17,
The compression coil spring 18 and the detection member 31 are driven by a vertically moving cylinder 38 to move vertically with respect to the cylinder support substrate 36. The left bending guide 17, the compression coil spring 18, and the detection member 34 are driven by a vertically moving cylinder 39 to move vertically with respect to the cylinder support substrate 37.

A proximity sensor 32 corresponding to the detection member 31 is provided on the cylinder support substrate 36 vertically long.
On the other hand, a proximity sensor 35 corresponding to the detection member 34 is provided on the cylinder support substrate 37 so as to be long in the left-right direction.
The proximity sensors 32 and 35 are both magnetic sensors,
While the metal sensing pieces 31b and 34b are close to each other, O
The state becomes N, and an ON signal is output to the CPU 52 (FIG. 3). When driven by the vertical movement cylinder 38 and the detection member 31 descends from the upper standby position (position A in FIG. 2), the detection piece 31b approaches the proximity sensor 32, and the proximity sensor 32 is turned on. Further, the detecting member 31 is lowered, and the tape material holding position (the position B in FIG. 2,
Guide position), the extension portion 31c
Is close to the lower end of the proximity sensor 32, and the proximity sensor 32 remains ON. Forks 22a, 22a
When the both ends of the belt loop are bent by this, the detection member 31 is driven by the vertically moving cylinder 38 and moves up together with the bending guide 17 and the like. When the detection piece 31b of the detection member 31 passes a predetermined distance past the proximity sensor 32, the proximity sensor 32 is turned off.

The left vertical movement cylinder 39 operates in synchronization with the vertical movement cylinder 38.
Moves up and down while maintaining substantially the same height as the detection member 31, and accordingly, the proximity sensor 35 is turned on / off. Positions of proximity sensors 32 and 35, detection boards 31 and 34
Is adjusted so that the height of the folding guides 17, 17 when the proximity sensors 32, 35 are turned off does not interfere with the forks 22a, 22a that advance toward the sewing machine. The CPU 52 controls the proximity sensor 3
When 2, 35 switch from the ON state to the OFF state,
It is configured to recognize that the folding guides 17 have reached a height that does not hinder the movement of the forks 22a. That is, the detection means of the present invention is constituted by the detection member 31 and the proximity sensor 32, and the detection member 34 and the proximity sensor 35.

In the belt loop supply device 30 having the above configuration, the folding guides 17 and 1
7, compression coil springs 18, 18, detection members 31, 34
Is driven by the vertically moving cylinders 38 and 39 and descends. Then, the tape material on the receiving plates 15, 15 supplied from the tape material supply means is compressed by the compression coil spring 18,
Press 18. In this state, the moving shafts 22 and 22 are moved to the rear standby position (P in FIG.
When the tape material is clamped at the belt loop forming position (P2 in FIG. 4A) by the forks 22a and 22a after moving forward from 1), the tape material is cut by a tape material cutting means (not shown). Next, the fork 22a, 22a bends both ends of the tape material toward the center in the longitudinal direction by the bending drive means 23. After that, the vertical cylinder 3
8 and 39, the bending guides 17 and 17, the compression coil springs 18 and 18, the detection members 31 and 34 are raised, and the forks 22a and 22a sew the sewing machine with the belt loop held therebetween (see FIG. )) To advance toward P3).

FIG. 3 shows a control circuit 50 of the belt loop supply device 30. The control circuit 50 mainly includes a CPU (Cent
(Ral Processing Unit) 52 and storage means 53. In addition, the control circuit 50 includes the proximity sensors 32, 35,
A start switch 51 (FIG. 4) operated by an operator when starting a belt loop supply operation, various driving sources 57 of the belt loop supply device, and display means 58 are connected. The storage unit 53 stores a program 54 for performing each operation of the belt loop supply device 57 and data 55 necessary for executing the program.
The storage unit 53 is provided with an area for storing various signals and information generated during the belt loop supply operation, and stores, for example, error information E generated during the supply operation. The various driving sources 57 include the vertical moving cylinders 38 and 39 or the moving substrate driving cylinder 40, the bending driving unit 23, the moving driving unit 26, and the like. The display means 58 is composed of a liquid crystal panel or the like and displays various kinds of information, and displays error information indicating that an abnormality has occurred, and alarms such as stopping supply of the belt loop.

When a start signal is input from the start switch 51, the CPU 52 performs a series of belt loop supply operations accompanying belt loop sewing while controlling and driving various driving sources 57. In addition, vertical movement cylinders 38, 39
After outputting a signal instructing ascending, the vertical movement cylinders 38 and 39 do not ascend and the proximity sensor 32,
If a predetermined time (for example, 200 milliseconds) elapses while the signal from 35 remains ON, the CPU 52
Determines that there is an error, writes error information E in the storage means 53, and displays the fact on the display means 58, and does not move the moving shafts 22, 22 to the sewing position. The CPU 52 recognizes the signals of the proximity sensors 32 and 35, and determines that an error has occurred if at least one of the sensors remains in the ON state.

According to the above belt loop supply device 30, after the belt loop is bent, the proximity sensors 32, 3
5 detects that the folding guides 17 have reached a predetermined height that does not interfere with the movement of the moving shafts 22, 22. That is, the folding guides 17 have a sufficient height. After confirming that the moving shafts have risen, the moving shafts 22 and 22 are moved to the sewing position. Therefore, the bending guide 1 due to some error
If the folding sensors 17 and 17 do not detect that the bending guides 17 and 17 have reached the predetermined height by the proximity sensors 32 and 35, the moving shafts 22 and 22 do not move to the sewing position. Therefore, the moving shafts 22, 22 and the forks 22a, 22a at the tip thereof are
The members 17 are not pressed or the output rods 38a and 39a are not pressed, and the members are not damaged.

The CPU 52 includes a vertically moving cylinder 3
After the signal for instructing the ascending is output to 8, 39, it does not become OFF even after the predetermined time has elapsed, and the bending guides 17, 1 are not turned off.
When it is determined that the belt 7 has not reached the predetermined height, error information is displayed on the display means 58, so that the operator can quickly grasp that an abnormality has occurred in the operation of the belt loop supply device and take a corresponding action. be able to.

In addition, the raising of the vertical moving cylinders 38 and 39 and the movement of the moving shafts 22 and 22 to the sewing position with respect to the vertical moving cylinders 38 and 39 have conventionally been performed according to a software timer.
In this case, software must be built with sufficient time. Conversely, loss time is included in advance.
However, in the belt loop supply device 30 of the present invention, when it is detected that the bending guides 17 have actually reached a safe predetermined height, the moving shafts 22 can be moved immediately, The loss time provided on the software is eliminated, and as a result, the operation time can be reduced.

The present invention is not limited to the above embodiment. For example, the detection means does not use a magnetic sensor, but may be an optical sensor or a mechanically operated sensor. Although two sets of detecting means are provided corresponding to the left and right bending guides, the positions of the two bending guides are set to one (1).
The detection means may be configured to perform the detection. Further, the detecting means of the present invention may be provided in a vertically moving cylinder that drives the bending guide. Further, according to the present invention, if a signal for instructing ascending is output to the vertically moving cylinders 38 and 39, and if the signal does not turn off even after a predetermined time has elapsed, it is determined that an error has occurred. Guide 17, 1
7 and the proximity sensors 32 and 35
After detecting the signal No. 4 (the signal from the proximity sensor is turned on), if the signal does not turn off after a lapse of a predetermined time, it may be determined that an error has occurred.

[0031]

According to the first aspect of the present invention, after the belt loop is bent by the bending member, the predetermined height is set so that the detection means does not hinder the movement of the loop supply means to the sewing position. Is detected, the detection by the detecting means is confirmed, that is, after confirming that the bending guide has been raised to a sufficient height, the sewing machine is moved to the sewing position by the loop supply means. Can be moved. With this configuration, in the case where the bending guide cannot be lifted due to some error, the detecting means does not detect that the bending guide has reached the predetermined height, and as a result, the loop supply means Does not move toward the sewing position, so that the loop supply means does not apply excessive force to the bending guide and the members for driving the bending guides, and the members do not break. In addition, the raising of the bending guide and the movement of the loop supply means to the sewing position corresponding thereto have conventionally been performed according to a timer on software. In this case, software must be built with sufficient time. Conversely, loss time is included in advance. However, in the belt loop supply device of claim 1, since it is possible to move the belt loop supply means immediately when it is detected that the folding guide has reached a safe predetermined height, the belt loop supply device is provided on software. Loss time is eliminated, and as a result, operation time can be reduced.

According to the second aspect of the present invention, under the control of the control means, the bending guide reaches the predetermined height even if a predetermined time has elapsed after the belt loop is bent based on the detection result of the detection means. Otherwise, the error information is displayed on the display means, so that the operator can quickly grasp that an abnormality has occurred in the operation of the belt loop supply device and take an appropriate action.

[Brief description of the drawings]

FIG. 1 is a front view of a belt loop supply device as an example of the present invention, which is partially cut away.

FIG. 2 is a right side view of the belt loop supply device of FIG.

FIG. 3 is a block diagram illustrating a control circuit of the belt loop supply device of FIG. 1;

FIG. 4 is a diagram showing a conventional belt loop supply device;
(A) is a side view showing a main part of a belt loop sewing machine and a belt loop supply device, and (b) is a main part front view showing how a tape material is bent.

[Explanation of symbols]

 9 Tape material holding means 17, 17 Bending guide 17a Front piece 17b Rear piece 18, 18 Compression coil spring 19, 20 Coil support member 22, 22, Moving shaft 22a, 22a Fork 30 Belt loop supply device 31, 34 Detecting member 32, 35 Proximity sensor 38, 39 Vertically moving cylinder 40 Moving substrate driving cylinder 41 Fixed plate 42 Moving substrate 50 Control circuit 52 CPU (control means) 53 Storage means 58 Display means

Claims (2)

[Claims] 1. A loop supply means for folding a belt loop at both ends thereof at a belt loop forming position toward a center in a longitudinal direction of the belt loop, and supplying the folded belt loop to a sewing position. It is provided so as to be able to move up and down, descends from an upper standby position to a guide position for guiding both ends of the belt loop, and when the belt loop is bent by the bending member, both ends orthogonal to the longitudinal direction of the belt loop near the both ends. A bending guide that guides the bending direction substantially in contact with the edge portion and that rises to a standby position after the belt loop is bent. A detecting means for detecting that the bending guide has risen to a predetermined height so as not to hinder movement. Troop supply device. 2. A storage means for storing error information; a display means for displaying error information; and when it is determined from the detection result of the detection means that the bending guide has not risen to the predetermined height, the error information is displayed. 2. The belt loop supply device according to claim 1, further comprising control means for displaying on the display means.