JP3029932B2 - Device for unfolding rectangular cloth - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for unfolding a rectangular cloth piece such as a sheet from a suspended state.

[0002]

2. Description of the Related Art A conventional apparatus for gripping one edge of a corner of a rectangular cloth, pulling it on a mounting table, and developing one side of a cloth piece has been proposed in Japanese Patent Application Laid-Open No. Hei 4-9198. This will be described with reference to FIGS. The conventional framing device shown in FIGS. 6 to 10 is for framing a rectangular cloth Y such as a sheet shown in FIG. 11, for example. And a rectangular solid type base 1 having a considerable length in the front-back direction (substantially longer than the entire length of the long side of the rectangular cloth Y to be treated); and Naru move forwards and backwards movable body 2, provided in two positions with a predetermined interval in the horizontal left-right direction in the mobile body 2, a rectangular shape cloth one corner C ₁ and the edge Y adjacent thereto in the Y _a of the corners of the cloth and the holding means 23 for the edges of the cloth, which can detachably hold _a part of a, and the moving body 2 is moved from the cloth holding position P at the front of the gantry to the cloth at the rear of the gantry. A moving body driving device 3 for moving back and forth in a range up to a retraction position Q; And the mounting table 4 for supporting the rectangular cloth Y drawn from the rear of the mounting table from below, a conveyor 5 constituting a part of the mounting table 4, and the conveyor 5 to be able to run in forward and reverse directions. a conveyor drive device 6, the side edges detector 71 for detecting the edge out side side edge Y _b of the square-shaped cloth Y, end edges detected for detecting an end edge Y _c of the same Ku way shape cloth Y The device 72 has a basic configuration including a controller 10 for controlling the operation of the bordering device.

[0003] A single guide rail 11 is erected at the upper part of the gantry 1 in the front-rear direction at an intermediate position in the left-right direction. The moving body 2 is guided by the guide rail 11 so as to be movable forward and backward in the front-rear direction of the gantry. The moving range of the moving body 2 in the front-rear direction is, as shown in FIG. 6, a cloth holding position P at which the moving body 2 is at the front of the gantry and can hold the rectangular cloth Y by the holding means 22 and 23. Therefore, as shown in FIG. 10, the movable body 2 is set at a range equal to or more than the cloth drawing position Q at which the rectangular cloth Y can be completely drawn onto the mounting table 4 at the rear of the gantry. The movable body 2 is formed by providing downwardly bent hanging plates 21 and 21 on both left and right sides of a flat plate 20 having a length of about the width of a human shoulder (length of about 40 to 60 cm) in the left and right direction. At the front end of each of the hanging plates 21, 21, one of the holding means 22, 2, for holding cloth, is provided.
3 are attached. And when viewed from the gantry front side, with a holding means 22 cloth corners C ₁ held on the right side, the holding means 23 positioned on the left side has a for fiber analog section holding, the respective retaining means 22 , 23 each employ a clip-type air chuck that operates with compressed air.

[0004] The moving body driving device 3 includes sprockets 32, 32 provided on the front and rear portions of the gantry 1, respectively, and a chain 33 with ends provided between the sprockets 32, 32.
And a motor 31 for rotating one sprocket 32 in both forward and reverse directions. One end of the chain 33 is fixed to the moving body 2 after being wound around the front sprocket 32. Therefore, the moving body driving device 3 includes the motor 31
By rotating the sprocket 32 clockwise or counterclockwise, the moving body 2 can be moved forward or backward along the guide rail 11. Mounting table 4
Is mounted at a position below the height position of each of the holding means 22 and 23, and the mounting table 4 has a front base plate 41 which is relatively short in the front-rear direction and a rear end of the front base plate 41. It has a rear base plate 43 provided continuously to the edge, and a conveyor 5 that can advance and retreat in the horizontal left and right directions near the rear end of the front base plate 41. The conveyor 5 is a pair of left and right rolls 5
The belts 52, 52 each having a total of four belts are wound between the belts 1, 51, and an appropriate interval S is provided between the belts 52, 52. In addition, each belt 52,5
The upper surface side running portion 2 is installed so as to run at a position near the upper surface side of the rear base plate 43. In addition, the conveyor driving device 6 can rotate the roll 51 on one side (left side) of the conveyor 5 forward and backward through a sprocket and a chain by a motor 61 which can rotate forward and backward.

[0005] side edge detector 71, when the square shape cloth Y is drawn to the gantry back side, for detecting the edge out side side edge Y _b of square shape textiles in conveyor installed part , A phototube is adopted. The side edge detector 7
1 is that in the gap S between the first belt 52 and the second belt 52 from the front side of the gantry of the conveyor 5 on the rear base plate 43, It is installed almost immediately below the position where the vehicle passes, with the detection unit facing upward. 72 is a end edge detector, photo cell is being employed, when approaching to the frame front end of the conveyor 5 in a rectangular shape cloth end edge Y _c mounting table on 4 Y, the the presence of the end edges Y _c are configured to detect. That is, the trailing edge detector 72 detects near the front end of the conveyor 5 on the rear base plate 43 and almost immediately below the position where the middle part of the moving body 2 in the left-right direction passes. It is installed with the part facing upward. And the side edge detector 71
And the end-edge detector 72 transmits the detection state or non-detection state of the cloth to the controller 10, respectively.

The controller 10 receives a signal from the side edge detector 71 and controls the conveyor driving device 6 to move the conveyor 5 in either the forward or reverse direction. In response to the cloth end edge detection signal from the controller, the moving body driving device is controlled so as to stop the operation. That is, when the side edge detector 71 is in the cloth non-detection state (when there is no cloth directly above the side edge detector 71), the upper surface side of the conveyor 5 is moved relative to the conveyor driving device 6. When the vehicle is controlled so as to travel in the side edge pushing direction (from left to right) and the side edge detector 71 is in the cloth detection state, the upper surface side of the conveyor 5 with respect to the conveyor driving device 6 has the side edge. Control is performed so that the vehicle travels in the part retraction direction (from right to left). Therefore, the side edge of the side of the rectangular cloth that comes into contact with the conveyor 5 is finely adjusted only in a small range on the left and right sides of the position detected by the side edge detector 71. become. Also, when the rectangular cloth Y is drawn into the back of the gantry together with the moving body 2, the end-edge detector 7
2 is a state where the cloth is not detected first, and then the end edge detector 7
2 above in a square shape cloth Y is approaches the become cloth detection state, end edges Y _c of the square-shaped cloth Y moving unit 2 further retracted
Is moved to the far side from the position detected by the edge detector 72, the cloth is not detected again. When the signal is transmitted from the edge detector 72 at that time, the controller 10 moves the cloth. The body driving device 3 is controlled so as to be stopped immediately.

[0007]

When a rectangular cloth piece is pulled onto a mounting table made of a feed belt while providing contact resistance at the convex front edge, the side edge of the rectangular cloth piece is pulled in the pulling direction. Tend not to be parallel to each other but to spread out. As a countermeasure, as a method of correcting the side edge of the piece of cloth in parallel with the traction direction, a mechanism for aligning the side edge of the piece of cloth with a divided feed belt conveyor as disclosed in Japanese Patent Application Laid-Open No. HEI 4-9198 has been proposed. I have. However, this conventional mechanism is complicated and increases the cost of the machine, and at the same time, the time required to correct the side edge of the cloth is added to the time required to expand the cloth, so that the development cycle time is lengthened and the capacity is increased. There was a problem that it could not be done. Also, since the position correction of the side edge of the cloth piece is performed after the cloth piece is pulled in and placed,
As a result of the cloth piece being sent to the next stage without being stretched and wrinkled, there is a drawback that the finished quality of sheets and the like in the ironer device in the subsequent process is reduced. In addition, when the normal deployment of the rectangular cloth piece pulled into the mounting table fails (folds, wrinkles,
Oblique, etc.), there is no inspection means and no exclusion means in the device,
It is sent to the next process as it is. As a result, catching on the feed roll, irona, etc. in the subsequent process,
Causes problems such as clogging, and the final process (irona)
Thus, there is a disadvantage that the cloth pieces which have been advanced to the point where they need to be reprocessed, the work man-hour and the processing energy are wasted. The present invention has been proposed to solve the above-mentioned conventional problems.

[0008]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for detecting the passage of at least two or more cloth pieces arranged on a straight line in a direction perpendicular to the direction in which the cloth pieces are pulled. A photoelectric sensor, a counter or a timer disposed on a rotating part of the conveyor driving unit and generating a pulse for detecting a moving distance of the conveyor, and inputting signals of the plurality of photoelectric sensors to the counter or the timer. A calculating means for calculating a plurality of specific positions of the rectangular cloth piece on the conveyor and detecting an oblique state of the rectangular cloth piece, and when the rectangular cloth piece is slanting beyond an allowable range, It is provided with a control device for discharging this out of the line, and this is used as means for solving the problem. Further, the present invention is to detect the rectangular cloth piece when the rectangular cloth piece is sandwiched between a conveyor and a pressing roller running in a horizontal direction perpendicular to the cloth piece pulling direction and when the conveyor stops and hangs down, At least two or more photoelectric sensors disposed on a straight line parallel to the press roller below the press roller, and sending the rectangular cloth piece to the next step of checking the presence of the rectangular cloth piece by the sensor, When any of the sensors does not detect the presence of the rectangular cloth piece, the control apparatus is provided with a control device for discharging the cloth piece out of the line, and this is used as a means for solving the problem.

[0009]

A plurality of photoelectric sensors arranged in a straight line detect the trailing edge of the rectangular cloth piece while the conveyor of the mounting table is moving with the rectangular cloth piece placed thereon. If the trailing edge of the rectangular cloth piece deviates obliquely from a line perpendicular to the direction of travel of the conveyor, there will be a difference in the detection timing of each photoelectric sensor. The detection signal of each photoelectric sensor is input to a counter or a timer and calculated. If the timing difference is within an allowable range, a rectangular cloth is sent to the next process. Discharge the piece of cloth out of the line. The rectangular cloth piece is sent by the conveyor of the mounting table, the trailing edge of the rectangular cloth piece is sandwiched between the press roller and the conveyor belt at the end of the conveyor, and the rectangular cloth piece hangs down. When there is, the presence of the hanging portion of the rectangular cloth is confirmed by a plurality of photoelectric sensors disposed below the pressing roller and sent to the next process. If any of the photoelectric sensors does not detect the presence of the rectangular cloth, the rectangular cloth may be bent,
It is determined that a problem such as separation of the pressing roller in the middle has occurred, and a mechanism for discharging the pressing roller out of the line is operated.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a sheet unfolding apparatus according to an embodiment of the present invention; FIG. Sheets 1
The names shown in FIG. 11 are used for the name of each corner and each side of 5. Well any and angular end C _1, edges Y and _a at a distance of shoulder width is attached to the gripper 16 of two clips 17 including the angular end C ₁ of the sheets 15 manually in FIG
To be gripped. The gripper 16 can travel on the guide rail 25 by the four wheels 18, engage a chain with a rack (not shown) provided on the upper part, and can be driven via the chain by driving means for the chain (not shown). I can do it.

[0011] The gripper 16 from which the sheet 15 is hung is driven by a chain (not shown), moves on a guide rail 25, and enters the developing device. Sheet 15 is convex front edge 3
While being spread at 6, the table 35 is pulled on the mounting table 35. The gripper 16 moves on the mounting table 35 and the side edge Y of the sheet 15
_At the position where _b has finished riding on the mounting table 35, the sheet 15 is released by a clip grip release mechanism (not shown). Next, the structure of the mounting table 35 will be described.
A large number of flat belts 46 hung on a pulley 40 intermittently driven by a motor 45 supported by 8, 39 are a main part of the mounting table 35.

A roller 58 is provided at the exit of the conveyor composed of the flat belt 46 on the mounting table 35. The roller 58 rotates about a shaft 59 by the operation of the pneumatic actuator 60, and the roller 58 rotates with respect to the flat belt 46. Or press
You can go away. A vacuum air spreader 65 is attached to the frames 38 and 39. The air spreader 65 is provided with a downwardly projecting spread plate 65a at the front edge thereof, and the sheets 15 are sucked by a downward suction slit 65b. The function of the mold spreading plate 65a is sufficiently exerted. A take-up bar 76 is guided by a guide 75 attached to the frames 38 and 39. The take-up bar 76 is used to intermittently drive a chain (not shown) and to connect one place of the chain to the take-up bar 76. It reciprocates while being guided by the guide 75 by a link mechanism not shown.

Next, a sheet development inspection mechanism will be described with reference to FIGS. 1 to 5. Above a conveyor 46 running in a horizontal direction perpendicular to the direction in which the sheets 15 are pulled, the passage detection of the sheets 15 is performed in a straight line in the pulling direction. Sensor 85 provided with three light beam light sources (x ₁ , x ₁ ,
x ₂ , x ₃ ) are arranged, and a reflection plate 86 is attached at a position where the light beam of the photoelectric sensor 85 hits (in a gap between the conveyors 46). A gear 84 is mounted on the output shaft of the conveyor drive reduction motor 45 shown in FIG. 2, and a proximity sensor 83 disposed on the output shaft detects a tooth of the gear 84 to generate a counter pulse. It is replaced by the travel distance. If the feed speed of the conveyor 46 is constant, a timer may be used instead of such a pulse counter. The photoelectric sensor 85 trailing portion Y _c is a plurality of sheets 15
Provided the position x ₁ of the light beam, x _2, the signals emanating by passing through x _3, and input to the time signal of the aforementioned counter or timer, pulse diagonal state of the trailing edge Y _c sheets 15 Or replace it with a time difference. Traveling of the conveyor 46;
And said counter pulses, the timing at which the light beam of the photoelectric sensor 85 is turned on at the trailing edge Y _c sheets 15, shown in the timing chart of FIG.

The conveyor 46 has a sheet 15 with a clip 17.
When the vehicle is moved away from the starting position, that is, after a command signal for releasing the grip of the clip is issued, the vehicle is started slightly later, and after traveling the distance set on the counter or the timer from the starting position, the sheet 1 is started.
5 of the rear edge Y _c sandwiched between the conveyor 46 and the pressing roller 58, and stops at reduced sagging sheets 15. As a result of the calculation, when the sheets 15 are in an inclined state beyond the allowable range, the counter or the timer is changed so as to extend the traveling time of the conveyor 46, and the sheets 15 are discharged out of the line without stopping. Is controlled as follows. Further, in the present invention, the sheet 15 is sandwiched between the conveyor 46 and the presser roller 58, and has a check and inspection mechanism for checking whether the sheet 15 is normal or abnormal at a position where the conveyor stops and hangs down. This will be described with reference to FIG. Below the pressing roller 58, for detecting three sheets 15 on a horizontal straight line,
A photoelectric sensor 87 provided with a light beam light source (positions thereof are indicated by z ₁ , z ₂ , and z ₃ in FIGS. 1 and 4) is provided at a position where the light beam of the photoelectric sensor 87 hits. The reflection plate 88 is mounted. A signal for confirming the existence of the sheet 15 is sent to the control device 50 by the photoelectric sensor 87, and the control device 50 inputs an operation circuit of means for sending the sheet 15 to the next step. In this case, one of the photoelectric sensors 87 is the sheet 1.
When the presence of the sheet 5 is not detected, the control device 50 receiving the signal instructs the sheet 15 to be discharged out of the line.

Next, the operation of the embodiment constructed as described above will be described. When the conveyor 46 of the mounting table 35 is moving while placing the sheets 15, a plurality of photoelectric sensors 85 arranged in a straight line are moved. detecting the trailing edge Y _c sheets 15. Sheets 15, 1 shown by a solid line and a two-dot chain line in FIG.
As 5 ', if the sheets after edge Y _c is shifted diagonally from a line in the traveling direction at right angles with the conveyor 46, a difference in detection timing of each of the photoelectric sensors 85 as shown in FIG. 5 occurs. This difference in detection timing (the trailing edge Y of the sheet 15)
The _c diagonal of the degree of) calculated by replacing the counter pulse or timer, if the timing difference is within the allowable range value N shown in FIG. 5 as n _1, the conveyor 46 starts at k ₁ the reference and from the photoelectric sensor beam positions x ₁ made is on position, counter pulses m corresponding to the distance of the normal operation
Traveling only _one stop at k _2. If the timing difference is n
If exceeds the allowable range value N as _2, the counter pulse is automatically set to m ₂ that is increased than the distance normal operation, the conveyor 46 starts at k ₁ the photoelectric sensor beam position x ₁ is turned on After traveling the distance corresponding to the counter pulse m ₂ from the position and discharging the sheets 15 out of the line,
Stop at position ₃ . After that, the next sheet 15 is
6 and is laterally pulled and mounted on the conveyor 46 of the mounting table 35.

The sheets 15 are fed by conveyor 46, the rear edge Y _c sheets 15 are sandwiched between the pressing roller 58 and the conveyor belt 46 at the end of the conveyor 46 is stopped, drooping is sheets 15 When three photoelectric sensors 8
7 confirms the presence of the hanging part of the sheet 15,
A signal is sent to the control device 50. The control device 50 is a sheet 15
Is input to the operation circuit of the take-in bar 76 which sends the data to the next step.
If the sheet 15 is bent as shown by a solid line in FIG. 4, or as shown by a sheet 15 'shown by a two-dot chain line,
If a problem such as separation of the pressing roller 58 occurs in the middle of the pressing roller 58 and any of the photoelectric sensors 87 (z ₁ , z ₂ , z ₃ ) does not detect the presence of the sheet 15, the feeding state of the sheet 15 is defective. And turning the conveyor 46 slightly in the forward direction,
Alternatively, the pneumatic actuator 60 is operated to separate the pressing roller 58 from the conveyor 46, and the sheets 15 are discharged out of the line.

[0017]

As described above in detail, according to the present invention, even if a rectangular cloth piece fails to be spread, 100% of the spread of the cloth piece is reliably and automatically inspected during and after the spreading, and during the process. Can be automatically discharged.
By removing defective products in this way, the problem that the cloth pieces are caught or entangled in the traveling device or processing equipment of the line is eliminated, and efficient operation can be performed without performing unnecessary processing in the next step and below. Can do it.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sheet developing apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion J in FIG. 1;

FIG. 3 is a view taken in the direction of arrow G in FIG. 1;

FIG. 4 is a view taken in the direction of the arrow H in FIG. 1;

FIG. 5 is an explanatory diagram showing an operation timing of the sheet expanding apparatus according to the embodiment of the present invention.

FIG. 6 is a perspective view of a conventional rectangular cloth spreading device.

FIG. 7 is a plan view of FIG. 6;

FIG. 8 is a sectional view taken along the line A-A in FIG. 6;

FIG. 9 is a perspective view of the same device in an operation state different from that of FIG. 6;

FIG. 10 is a perspective view showing an operation state different from that of FIG. 9;

FIG. 11 is an explanatory diagram showing reference numerals of respective portions of a rectangular cloth piece.

[Explanation of symbols]

 REFERENCE SIGNS LIST 15 sheets 16 gripper 17 clip 25 guide rail 35 mounting table 36 convex front edge 38, 39 frame 46 flat belt 50 control device 58 pressing roller 60 actuator 76 capture bar 85, 87 photoelectric sensor 86, 88 reflector

Claims (2)

(57) [Claims] An apparatus for unfolding a rectangular cloth piece for detecting the passage of at least two cloth pieces arranged on a conveyor running in a horizontal direction perpendicular to the cloth piece pulling direction and arranged in a straight line in the pulling direction. A photoelectric sensor, a counter or a timer disposed on a rotating part of the conveyor driving unit and generating a pulse for detecting a moving distance of the conveyor, and inputting signals of the plurality of photoelectric sensors to the counter or the timer to input the signals to the counter or the timer. Calculate a plurality of specific positions of the rectangular cloth on the top,
It is provided that the apparatus comprises a calculating means for detecting an oblique state of the rectangular cloth piece, and a control device for discharging the rectangular cloth piece to the outside of the line when the rectangular cloth piece is inclined beyond an allowable range. Characteristic rectangular cloth stripping device. 2. A rectangular cloth piece unfolding apparatus, wherein the rectangular cloth piece is sandwiched between a conveyor and a pressing roller running in a horizontal direction perpendicular to the cloth piece pulling direction, and when the conveyor stops and hangs down, the rectangular cloth piece is bent. At least two photoelectric sensors arranged in a straight line parallel to the press roller below the press roller so as to detect the shaped cloth piece, and the next step of confirming the presence of the rectangular cloth piece by the sensor. And a control device for discharging the rectangular cloth piece to the outside of the line when any of the sensors does not detect the presence of the rectangular cloth piece. Deployment device.