JP4178283B2 - Fabric sewing end chuck device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chuck device for clamping an end of a cloth on the sewing end side in a sewing machine traveling type sewing machine used for sewing a cloth such as a curtain.
[0002]
[Prior art]
2. Description of the Related Art As a sewing machine for sewing a curtain or the like, a sewing machine traveling type sewing machine that fixes a cloth and runs a sewing machine has been conventionally used. In general, the sewing machine is operated by setting the cloth at a predetermined position on the work table, fixing the sewing start side end with the chuck of the origin clamp, and fixing the sewing end side end of the cloth drawing table. The sewing machine is sewed by running the sewing machine in a state where it is sandwiched between chucks and the cloth drawing table is pushed by hand and pulled and tension is applied.
[0003]
When sewing the fabric with a sewing machine that runs on the sewing machine, fix the end of the fabric on the sewing start side with the origin clamp and pinch the end of the sewing end with the chuck of the cloth drawing table and pull it by hand. However, in this case, if the fabric end is held near the sewing position of the sewing machine, that is, the position where the sewing machine needle passes, the chuck will interfere with the sewing machine at the sewing end. This is difficult in terms of structure. Therefore, in the conventional apparatus, the position held by the chuck of the cloth drawing table is the position on the work table from which the sewing position of the sewing machine is removed.
[0004]
[Problems to be solved by the invention]
As described above, conventionally, when the fabric is sewn by the sewing machine running on the sewing machine, the position of the sewing end of the fabric deviated from the sewing position is held by the chuck of the cloth drawing table. Since the end is not pinched, there is a problem such as sewing shrinkage and fabric escape near the end of the sewing end, which affects the sewing work of the fabric and the finished dimensions. It was. Therefore, depending on the type of fabric, the operator may have to hold the sewing position of the sewing machine at the end of the sewing end by hand and release it when the sewing machine approaches. It was difficult to keep.
[0005]
Therefore, when sewing the fabric with a sewing machine that is traveling on the sewing machine, it is an object to mechanically hold the sewing end portion of the fabric so that the sewing work with stable quality can be performed.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is provided with a sewing position clamping chuck that can be retracted to a position that avoids interference with the sewing machine in addition to the conventional chuck that clamps the end of the cloth on the work table. Is.
[0007]
That is, the fabric sewing end chuck device of the invention according to claim 1 is a chuck device for clamping the end of the fabric on the sewing end side in a sewing machine that fixes the fabric and runs the sewing machine, In addition to the first chuck for clamping the end of the fabric on the work table, a chuck position for clamping the sewing position of the fabric end at a position closer to the sewing machine than the first chuck and an approaching sewing machine A second chuck capable of switching the position to a retracted position for avoiding interference is provided. In this case, in order to hold the end portion on the sewing end side of the fabric to be sewn, the sewing position can be held in addition to the position on the work table similar to the conventional device, and the sewing position can be held. The second chuck can be opened and moved to the retracted position when the sewing machine approaches to avoid interference with the sewing machine. Therefore, even if the operator does not grasp the end portion on the sewing end side of the fabric, it is possible to prevent the occurrence of the shrinkage of the fabric and the escape of the fabric, and a sewing operation with stable quality is possible.
[0008]
According to a second aspect of the present invention, in the cloth sewing end portion chuck device according to the first aspect, the second chuck is configured such that the position is switched between a chuck position and a retracted position by a turning movement. Thereby, the second chuck can have a simple structure, a compact size, and high reliability.
[0009]
According to a third aspect of the invention, in the cloth sewing end portion chuck device according to the first or second aspect, switching of the position of the second chuck is controlled based on a signal of a sensor that detects the approach of the sewing machine. Thus, the sewing position of the sewing end can be chucked and held as much as possible while avoiding interference with the approaching sewing machine.
[0010]
According to a fourth aspect of the invention, in the cloth sewing end portion chuck device according to the third aspect, after the approach of the sewing machine is detected, it is detected that the second chuck does not move to the retracted position within a predetermined time. Thus, a means for temporarily stopping the sewing machine is provided, whereby contact with the sewing machine when the second chuck does not retreat due to a failure or the like can be prevented.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 shows a plan view of a sewing machine according to an example of an embodiment of the present invention in a state where the sewing machine is at a home position, and FIG. FIG. 3 is a plan view of the main part structure in a state where the cloth pulling chuck is opened and turned, and FIG. 4 is a plan view of the main part structure in a retracted position.
[0013]
The sewing machine shown in this example has a sewing machine 2 for sewing on the side of the work table 1 as shown in FIG. The sewing machine 2 is in a state where the home position is in the state shown in FIG. 1, and the fabric p on the work table 1 is sewn and sewn by moving forward from the home position along the work table 1 to the right in FIG. Thereafter, the vehicle is controlled to travel backward toward the home position. Further, on the work table 1, an end portion on the sewing start side of the fabric p set on the work table 1 at a predetermined position located on the side of the sewing machine 2 at the home position (downward in FIG. 1). An origin clamp 3 having an air cylinder type chuck 3a for fixing the fabric p is provided, and as a chuck device for pulling the end of the fabric p on the sewing end side in front of the sewing machine traveling direction, A cloth drawing table 4 that is movable in the sewing machine traveling direction is placed.
[0014]
In addition to the air cylinder type fabric chuck 5 (first chuck) for clamping the end of the fabric p on the sewing end side at a position near the sewing machine 2 on the work table 1, the cloth drawing table 4 further includes An air cylinder sewing position chuck 6 (second chuck) for clamping the sewing machine sewing position (near the needle position) is provided near the sewing machine 2. The sewing position chuck 6 is supported by a turning point fitting 7, and is connected to a turning air cylinder 8. The turning air cylinder 8 can turn from the clamp position shown in FIG. 1 to the retracted position shown in FIG. is there. The turning air cylinder 8 is provided with a cloth drawing table turning position detection sensor 9 for detecting that the sewing position chuck 6 has turned to a predetermined retracted position by the air cylinder 8. The cloth chuck 5 and the sewing position chuck 6 of the cloth drawing base 4 and the chuck 3a of the origin clamp button 3 are turned on and off by the clamp buttons 10, 11 and 12, respectively.
[0015]
A sensor reflector 13 is attached to the cloth drawing base 4 at a position near the sewing machine 2 on the front side in the running direction of the sewing machine. A cloth drawing detection sensor 14 is attached to the sewing machine 2 so as to detect the sensor reflection plate 13 of the cloth drawing base 4 when the traveling sewing machine 2 approaches the sewing end position. Further, the sewing machine 2 has a cloth detection sensor 16 for detecting that the needle of the sewing machine 2 has passed the sewing end position of the cloth p in order to determine the timing of thread trimming at a predetermined position on the side (downward in FIG. 1). Is attached.
[0016]
The operation of this sewing machine is as follows.
[0017]
First, the fabric p to be sewn is set at a predetermined position on the work table 1 in the state of the sewing machine origin fixed position shown in FIG. Then, the end of the fabric p on the sewing start side is sandwiched between the chucks 3a of the origin clamp 3, the clamp button 12 is pressed to fix the chuck, and the end of the sewing end side is the fabric chuck 5 of the fabric drawing table (cloth drawing clamp) 4 and Clamping is performed with the sewing position chuck 6 and the clamp buttons 10 and 11 are pressed to fix the chuck, and the cloth pulling base 4 is moved lightly to the front side (right side in FIG. 1) in the sewing machine traveling direction to give tension to the fabric p. Then, the cloth p is sewn by rotating the sewing machine 2 and running it in the forward direction (right direction in FIG. 1).
[0018]
When the sewing machine 2 advances to the position shown in FIG. 2 and the cloth drawing detection sensor 14 detects the sensor reflecting plate 13 of the cloth drawing base 4, the sewing position chuck 6 is opened and swiveled in the direction indicated by the arrow in FIG. As shown in FIG. 4, it moves to the retracted position where it does not interfere with the sewing machine 2. Therefore, the sewing machine 2 can move forward without contacting the cloth drawing table 4.
[0019]
The sewing machine 2 is controlled so as to advance to a predetermined position and stop after the operation of the cloth drawing detection sensor 14.
[0020]
Further, when the cloth pulling table turning fixed position sensor 9 does not detect that the sewing position chuck 6 has moved to the retracted position within a predetermined time after the cloth pulling detection sensor 14 detects the sensor reflecting plate 13 of the cloth drawing table 4, the sewing machine 2 is paused.
[0021]
These controls are performed by a control unit (not shown) composed of a microcomputer.
[0022]
Further, as another example of the embodiment, the configuration of the chuck device can be changed as follows, for example.
[0023]
That is, in the example shown in FIGS. 5 and 6, the sewing position chuck 6 (second chuck) of the cloth drawing base 4 is moved from the chuck position (state shown in FIG. 5) to the fabric chuck 7 ( The first chuck) is linearly moved in the direction of drawing toward the side, and is switched to the retracted position (state shown in FIG. 6). Since other configurations are the same as those in the previous example according to FIGS. 1 to 4, the same reference numerals are given to the drawings, and detailed description thereof is omitted.
[0024]
In the example shown in FIGS. 7 to 9, the sewing position chuck 6 (second chuck) of the cloth drawing base 4 is once moved from the chuck position (the state shown in FIG. 7) to the sewing machine as indicated by an arrow in FIG. A straight line is moved to the front position in the traveling direction (state shown in FIG. 8), then the direction is changed by 90 degrees, and the straight line is moved in the direction indicated by the arrow in FIG. It is composed. In this case as well, the other configurations are the same as those of the previous example shown in FIGS.
[0025]
It should be noted that the present invention is not limited to the above examples, and it is needless to say that various modifications can be made without departing from the technical idea of the invention.
[0026]
【The invention's effect】
As is clear from the above description, according to the fabric sewing end portion chuck device of the present invention, the sewing end portion of the fabric can be mechanically held in the fabric sewing operation so that the operator can hold it by hand. Therefore, it is possible to perform sewing work with stable quality.
[Brief description of the drawings]
FIG. 1 is a plan view showing a sewing machine according to an example of an embodiment of the present invention in a state where a sewing machine is at a home position;
FIG. 2 is a plan view showing the main structure of the sewing machine in a chuck position when a cloth drawing sensor is detected;
FIG. 3 is a plan view showing the main part structure of the sewing machine in a state where the cloth pulling chuck is opened and turned;
FIG. 4 is a plan view showing the main structure of the sewing machine in a retracted position;
FIG. 5 is a plan view showing the main structure of a sewing machine according to a second example of the embodiment in a chuck position state;
FIG. 6 is a plan view showing the main structure of the sewing machine according to the second example in a retracted position;
FIG. 7 is a plan view showing the main structure of a sewing machine according to a third example of the embodiment in a chuck position state;
FIG. 8 is a plan view showing the main structure of the sewing machine according to the third example in a state of being moved to the retracted position;
FIG. 9 is a plan view showing the main structure of the sewing machine according to the third example in a retracted position.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Work table 2 Sewing machine 4 Fabric drawing stand 5 Material chuck 6 Sewing position chuck 8 Air cylinder for rotation
13 Sensor reflector
14 Cloth pull detection sensor p Fabric

Claims (4)

A chucking device for clamping an end of the cloth on the sewing end side in a sewing machine for fixing the cloth and running a sewing machine, the first chuck holding the edge of the cloth on a work table In addition, it is possible to switch the position between a chuck position that holds the sewing position of the cloth end portion at a position closer to the sewing machine than the first chuck and a retreat position that avoids interference with the approaching sewing machine. A cloth sewing end chuck device comprising a second chuck. The cloth sewing end chuck device according to claim 1, wherein the position of the second chuck is switched between the chuck position and the retracted position by a turning movement. 3. The cloth sewing end chuck device according to claim 1, wherein switching of the position of the second chuck is controlled based on a signal of a sensor that detects the approach of the sewing machine. The cloth sewing end portion according to claim 3, further comprising means for temporarily stopping the sewing machine by detecting that the second chuck does not move to the retracted position within a predetermined time after the approach of the sewing machine is detected. Chuck device.

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