JPH0822701B2 - Cloth feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to stacking a plurality of cloths having the same shape with partially different thicknesses in the same direction and stacking them one by one, and sequentially taking out the cloths one by one to a predetermined position. The present invention relates to a cloth feeding device for feeding.

[Conventional technology]

For example, as a cloth feeding device for stacking a large number of cloths having different thicknesses such as cuff cloths having a peripheral edge sewn and feeding them one by one, the one shown in FIG. 9 is conventionally used. Are known.

To briefly explain this, a large number of cuff cloths 100 of the same shape are stacked in the box-shaped stocker 50 in the same direction, and the stocker 50 is lifted together with the cuff cloth 100 by a lifting device (not shown), and a predetermined amount is stacked. After the top cuff cloth, which has reached the height, is transferred to a known pick-up device 51 using a vacuum chuck, a hook, etc. located above, the pick-up device 51 moves and the cuff cloth moves. The cloth is supplied to the next sewing process such as a buttonhole stitch sewing machine and a button sewing machine.

[Problems to be Solved by the Invention]

However, such a conventional cloth feeding device has the following problems.

That is, generally, the cuff cloth 100 has a cuff surface cloth 102 and a back cloth 103 on both sides of an interlining 101, as shown in FIG.
, And turn the three sides around the edge to
Since it is formed of 104, the part 1 where the cloth is folded back
The thickness of 00a, 100b, 100c is getting thicker.

Therefore, when a number of 100 cuff cloths of the same shape are stacked in the same direction and stored in the stocker 50, the cloth surface of the top layer is the 9th.
As shown in the figure, the height of point a is the highest, and the height becomes lower in the order of points b, c, and d, resulting in a three-dimensional curved surface. This phenomenon becomes more remarkable as the number of cuff cloths piled up increases.

Therefore, even if the uppermost cuff cloth is to be taken out by the pick-up device 51, the upper surface is not horizontal, and its surface shape changes greatly depending on the type of cuff cloth and the number of stacked sheets, and the shape and structure of the pick-up device. Not only becomes complicated, but there is also a risk of malfunctions such as missing or taking out two or more sheets.

Further, there is a problem in that a large and complicated device is required for raising and lowering the stocker 50 on which a large number of cuff cloths are stacked and for controlling the height thereof, which is expensive.

The present invention has been made in view of the above points, and an object of the present invention is to provide a cloth supply device, which can always perform a stable supply operation, at a low cost regardless of the kind of cloth and the number of stacked sheets.

[Means for solving the problem]

In order to achieve the above object, the present invention is a cassette that can be stacked and stored with a cloth and has an opening on one end side of the bottom surface,
By injecting air near the outer peripheral portion of the roller between the roller and the roller arranged below the opening on the bottom surface of the cassette and orthogonal to the cloth feeding direction, , An air ejecting means for causing a negative pressure between the one end side of the lowermost layer cloth exposed from the opening and the roller to move the lowermost layer cloth in the roller direction, and the remaining cloth Holding means for carrying and raising one end side, pinch roller for pressing the lowermost cloth moved in the roller direction to the roller, and feeding means for driving the roller to send the cloth pressed to the roller And a cloth supply device provided with.

Further, in the above-mentioned apparatus, it is also possible that the feeding means comprises an actuator which grips and moves one end of the cloth moved in the roller direction by the negative pressure generated by the air injection means.

[Work]

With the above configuration, when a large number of cloths are stacked in the cassette and air is jetted by the air jetting means so as to come into contact with the outer peripheral portion of the roller, the air jet produces Negative pressure is generated on the roller surface, and one end of the lowermost cloth moves toward the lower roller due to the negative pressure and its own gravity, and then is pressed against the roller by a pinch roller. .

In this state, the remaining cloth is carried by the holding means and raised for a predetermined length, and the lowermost cloth is sent out to a predetermined position by the sending-out means.

In this way, the piled cloths are separated and sent out one by one from the bottom layer where the flatness is always maintained, so that extremely stable supply is possible and a large and heavy stocker is moved up and down. No means for controlling the height is required, and the structure can be remarkably simplified.

At the same time, since the pick-up device, which was conventionally provided above stacked fabrics, is not required, it is possible to add fabrics sequentially from above during the feeding operation, and to form a continuous work line from the previous process. You can

Further, in the above apparatus, if the feeding means is constituted by an actuator that grips and moves one end of the cloth that has moved in the roller direction, the rotation mechanism of the roller and the pinch roller are not required, and the cloth can be supplied at low cost. You can

〔Example〕

An embodiment in which the present invention is applied to a cuff cloth feeding device will be described below with reference to FIGS. 1 to 7 of the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention, in which a cassette 2 for accommodating and stacking the cuff cloth 100 inside is fixedly mounted on a base plate 1, and a bottom plate 2a of the cassette 2 in the longitudinal direction. An opening 2b is provided at one end, and correspondingly, an opening 1a is also provided in the base plate 1 forming the bottom surface of the cassette 2 together with the bottom plate 2a.

A roller 11 is rotatably arranged below these openings 1a and 2b so as to be orthogonal to the longitudinal direction of the cassette 2, and a motor 12 rotates the roller 11 in a direction of an arrow A through a timing belt 13. The cuff cloth feeding means is constituted by these.

Further, an air blow nozzle 14 capable of injecting air into the space between the roller 11 and the openings 1a, 2b is provided, and the ejected air is directed in a direction in which the air comes into contact with the outer peripheral portion of the roller 11 substantially at the center. Make up.

Further, as shown in FIG. 2, an air cylinder 15 is provided orthogonally to the axis of the roller 11, and one end of a bell crank 16 is connected to the tip end of the piston rod 15a thereof, and the bell crank 16 can be swung by a shaft 17. Pivoted to the Bell Crank 16
A pinch roller 18 is rotatably supported by the other end of the shaft. Then, the air cylinder 15 is actuated to project the piston rod 15a, so that the bell crank 16 rotates about 90 degrees clockwise about the shaft 17 as a fulcrum, and the pinch roller 18 can be pressed against the outer peripheral surface of the roller 11.

On the other hand, as also shown in FIG. 3, a base plate 21 is erected on the upper side of the base plate 1 on the right side of the cassette 2 (FIG. 1) and an air cylinder 22 is fixedly mounted, and a sliding member 23 is mounted on the piston rod 22a. As one. An L-shaped holding arm 24 is attached to the sliding body 23 as a shaft 25.
By means of a spring (not shown), the holding arm 24 is biased in the counterclockwise direction so as to maintain the state shown in FIG.

Further, an air cylinder 26 is fixedly mounted on the sliding body 23, the tip end of the piston rod 26a is brought into contact with the holding arm 24, and the air cylinder 26 is actuated to project the piston rod 26a. Rotates clockwise against the urging force, enters the cassette 2 through the opening 2c provided in the lower part of the side surface of the cassette 2 and the substrate 21, and is lifted upward by the operation of the air cylinder 22. So that the lower surface of the stacked cuff cloth 100 can be held.

In FIG. 1 to FIG. 3, 31 is a sensor (photo sensor) for detecting the presence or absence of the cuff cloth 100, 32 is a sensor (photo sensor) for detecting whether the separation and feeding of the cuff cloth is completed, and 33 is an air cylinder. Reference numeral 15 is a sensor for setting the initial state, 34 is a sensor for detecting the operating state, 35 is a sensor for setting the initial state of the air cylinder 22, and 36 is a sensor for detecting the operating state.

FIG. 4 is a circuit diagram showing the air circuit of the above embodiment,
V1, V2, V3 are solenoid valves installed on the multi-valve block V and controlling the operation of the air cylinders 22, 15, 26, respectively, MF
Is a silencer, V4 is a solenoid valve that controls the air injection from the air blow nozzle 14, SC1 to SC6 are flow control valves with check valves, J1 to J8 are each connection part of the pipeline, RF is the pressure control of the air circuit and It is a filter.

Further, FIG. 5 is a block diagram showing the configuration of the control device of this embodiment, in which the signals from the respective sensors 31 to 36 and the start signal are input to the controller 37 which is a micro computer, and a command from the controller 37 is issued. About each solenoid valve
It controls V1 to V4 and the motor 12.

Next, the operation of this embodiment having the above structure will be described with reference to the flow chart shown in FIG.

When a start switch (not shown) is pressed and a start signal is input to the controller 37 shown in FIG. 5, the operation shown by the flow chart in FIG. 6 is started.

First, the solenoid valves V1 to V3 shown in FIG. 4 are all returned to the illustrated state, and an initialization process is performed to bring the apparatus to the initial state shown in FIG. As a result, the sensor 33 shown in FIG. 2 and the sensor 35 shown in FIG. 3 output detection signals.

When the initialization is completed, it is judged whether or not the sensor 31 detects the cuff cloth, and if not detected, the processing is ended, but if it is detected, the solenoid valve V4 is reversed from the state shown in FIG. The state is switched to allow the pressurized air supplied through the filter RF to pass therethrough to eject the air from the air blow nozzle 14 to generate a negative pressure near the upper surface of the outer peripheral portion of the roller 11.

As a result, the negative pressure is sucked and its own gravity also acts, so that one end of the bottom cuff cloth 100n moves toward the roller 11 through the openings 1a and 2b.

When the sensor 32 detects that the cuff cloth 100n has moved in the direction of the roller 11, the solenoid valve V3 is switched to operate the air cylinder 26, and the holding arm 24 is drawn from the position shown by the solid line in FIG. Turn clockwise to the position shown, and let the tip end of the cuff cloth 100 excluding the lowermost layer 100.

When 0.2 seconds have elapsed after the sensor 32 detected the cuff cloth, the solenoid valve V1 was switched to operate the air cylinder 22,
The sliding body (23) is raised by a predetermined length together with the holding arm (24) that is turned clockwise, and the right end side of the stacked cuff cloths (100) is lifted upward.

When this increase is detected by the sensor 36 shown in FIG. 3, the solenoid valve V2 is switched to operate the air cylinder 15, the pinch roller 18 is swung via the bell crank 16, and the cuff is moving toward the roller 11. One end of the cloth 100n is crimped to the outer peripheral surface of the roller 11 (see FIG. 7).

When this is detected by the sensor 34 attached to the air cylinder 15, the motor 12 is rotated, and the roller 11 is rotated in the direction of arrow A in FIG. As a result, the cuff cloth 100n held by the roller 11 and the pinch roller 18 is sent out in the direction B in FIG.

When the sensor 32 shown in FIG. 2 no longer detects the cuff cloth due to this delivery, the solenoid valve V4 is returned to the state shown in FIG. 4 to stop the air blow from the air blow nozzle 14, and 0.5 seconds later. Stop the motor 12 and turn the roller 11
Stop the rotation of.

After that, the process returns to the initial initializing process again, and if the sensor 31 detects the cuff cloth, the above-described processing is repeated to send out all the stacked cuff cloths. When all the cuff cloths have been sent out, the sensor 31 no longer detects the cuff cloths, so this processing ends.

The cuff cloth sent out in this manner is sent to an automatic sewing device by a carrying device (not shown), and hole hooking and button sewing are performed.

Next, FIG. 8 shows a main part of another embodiment of the present invention in which the feeding means of the above embodiment is modified.

In this example, the cuff cloth 10 is moved in the direction of the roller 11.
To pull out 0n, an air cylinder 41 having a piston rod 41a that expands and contracts in the pulling direction and an air cylinder 42 fixedly provided at the tip of the piston rod 41a are provided, and the chuck 43 is opened and closed by the air cylinder 42. The claw cloth 100n is pulled out by contracting the piston rod 41a while holding one end of the cuff cloth 100n together with the fixed claw 44.

According to this embodiment, the driving mechanism for rotating the roller 11, the pinch roller 18 and the crimping mechanism for pressing the pinch roller 18 to the roller 11 are unnecessary, and therefore the configuration can be further simplified.

The same results can be obtained by replacing each air cylinder in the above-described embodiment with a direct acting type actuator such as a solenoid.

〔The invention's effect〕

As described above, according to the present invention, the piled cloths are separated from the bottom layer kept flat at a fixed position one by one, and sent out, so that it is extremely stable regardless of the shape of the upper layer portion. In addition to the above, the conventional large and heavy stocker lifting device and height control device are not required.

Further, since the air jetting means is used to separate one of the lowermost layers from the piled cloths, no moving parts are required, and the cloths are directly engaged with each other to mechanically separate the cloths. There is no risk of damage, and there is no need to adjust the thickness of the cloth or the strength of the waist.

At the same time, since the pick-up device above the cloth, which was conventionally required, is not required, the cloth that decreases due to the feeding can be continuously replenished from above, and a continuous work line can be formed from the previous process. Will be possible.

Further, if the feeding means is composed of an actuator that grips and moves one end of the cloth that has moved in the roller direction, the rotation mechanism of the roller, the pinch roller and the crimping mechanism thereof are not required, and therefore the configuration is further improved. It is simplified and can be supplied at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view showing a separating and feeding mechanism of the lowermost cloth, and FIG. 3 is a front view showing a holding mechanism for the remaining cloth. 4, FIG. 4 is a circuit diagram showing the air circuit, FIG. 5 is a block diagram showing the control device, FIG. 6 is a flow chart showing its operation, and FIG. 7 is a perspective view of a main part showing the separated feeding state. FIG. 8 is a front view of a main part showing another embodiment of the present invention, FIG. 9 is a perspective view illustrating only a main part of a conventional cloth feeding device, and FIG. 10 is a perspective view showing an example of cloth. is there. 1 ... Base plate, 2 ... Cassette 1a, 2b ... Opening, 11 ... Roller 12 ... Motor, 14 ... Air blow nozzle 15,22, 26, 41, 42 ... Air cylinder 18 ... Pinch roller , 21 ...... Substrate 23 ...... Sliding body, 24 ...... Holding arm 31,32,33,34,35,36 ...... Sensor 43 ...... Check, 100 ...... Cuff cloth 100n ...... Bottom layer cuff Cloth V1 to V4 ... Solenoid valve SC1 to SC6 ... Flow control valve with check valve

Claims (2)

[Claims] 1. A cassette which can store stacked fabrics and which has an opening at one end of a bottom surface thereof, and a roller which is disposed below the opening on the bottom surface of the cassette and is orthogonal to the feeding direction of the cloths. By injecting air between the roller and the opening portion toward the outer peripheral portion of the roller, a negative pressure is applied between the roller and one end side of the lowermost layer of fabric exposed from the opening portion. Air jetting means for causing the lowermost layer cloth to move in the roller direction, holding means for holding and raising the one end side of the remaining cloth, and the lowermost layer cloth moving in the roller direction. A cloth feeding device comprising: a pinch roller that is pressed against the roller; and a feeding means that drives the roller to feed the cloth that is pressed against the roller. 2. The cloth feeding apparatus according to claim 1, wherein the feeding means comprises an actuator that grips and moves one end of the cloth moved in the roller direction by the negative pressure generated by the air ejecting means.