JP2020175005A - Clothes spreading apparatus - Google Patents

Abstract

To provide a clothes spreading apparatus capable of suppressing jump of clothes due to a speed difference between a device in one process and a device in a next process.SOLUTION: A clothes spreading apparatus 1 comprises an intermediate conveyor 51 for conveying clothes C already spread, a discharging conveyor 52 that is connected with the end edge of the intermediate conveyor 51 and that discharges the clothes C to a next process device, and a control part 11 for controlling operation of the intermediate conveyor 51. The conveyance speed of the intermediate conveyor 51 at the start of conveyance when the clothes C is fed to the intermediate conveyor 51 is taken as a first speed, and the control part 11 increases the conveyance speed of the intermediate conveyor 51 from the first speed to a second speed when the clothes C floats at a connection part 53 between the intermediate conveyor 51 and the discharging conveyor 52.SELECTED DRAWING: Figure 6

Description

The present invention relates to a cloth deploying device. More specifically, the present invention develops cloths such as washed sheets, wrapping cloth (two-sheet cloth duvet cover), pillowcases, towels, and tablecloths, and supplies them to the processing apparatus in the next process. Regarding the type deployment device.

Sheets are used in large quantities in hotels and hospitals. Used sheets are washed and ironed at the laundry factory and used again at hotels and hospitals. At the laundry factory, after washing cloth such as sheets, ironing with a roll ironer or folding with a cloth folding device is performed. In order to supply the cloth to these processing devices, it is necessary to deploy the cloth in advance. When a worker performs the work of unfolding the cloth, a great deal of time and labor is required for the work. Therefore, in recent years, this work has been performed using a cloth unfolding device (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-215361

The roll ironer following the cloth unfolding device has a cloth transport speed set to be slightly faster than that of the cloth unfolding device. Due to this speed difference, the cloth discharged from the cloth deploying device is pulled in the transport direction, the occurrence of wrinkles can be suppressed, and the wrinkles can be smoothed.

However, as shown in FIG. 12, if the transport speed of the roll ironer 200 is too high, the cloth C is pulled excessively and floats from the conveyors 101 and 102. If the transportation proceeds in this state, the rear end of the cloth C jumps away from the conveyor 101. Then, as shown in FIG. 13, large wrinkles are generated at the rear part of the cloth C.

In view of the above circumstances, it is an object of the present invention to provide a cloth unfolding device capable of suppressing jumping of cloth due to a speed difference with the next process device.

The cloth unfolding device of the first invention is a cloth unfolding device that unfolds the cloth and supplies it to the next process device, and is connected to an intermediate conveyor that conveys the unfolded cloth and the end of the intermediate conveyor. A discharge conveyor that discharges the cloth to the next process apparatus and a control unit that controls the operation of the intermediate conveyor are provided, and the control unit starts transporting the cloth supplied to the intermediate conveyor. The transport speed of the intermediate conveyor at the time is set to the first speed, and when the cloth floats up at the connection portion between the intermediate conveyor and the discharge conveyor, the transport speed of the intermediate conveyor is changed from the first speed to the second speed. It is characterized by increasing the speed.
In the first invention, the cloth deploying device of the second invention is the time when a preset levitation time elapses from the time when the front end of the cloth reaches the speed increasing position of the next process device. It is characterized by being ascended.
In the first invention, the control unit receives a third speed, which is a transfer speed after the speed increasing position of the next process device, from the next process device, and the third speed is the third speed. The speed difference between the first speed and the first speed is obtained, the preset running distance is divided by the speed difference to obtain the ascent time, and the ascent time is obtained from the time when the front end of the cloth reaches the speed increase position. It is characterized in that the elapsed time is defined as the ascending time.
In the first invention, the cloth deploying device of the fourth invention includes a levitation detection sensor that detects the levitation of the cloth at the connection portion, and the control unit detects the levitation of the cloth by the levitation detection sensor. It is characterized in that the time is the ascending time.
In any one of the first to fourth inventions, the cloth deploying device of the fifth invention is described by the control unit at the end of transportation when the rear end of the cloth reaches the connection unit, or from the end of transportation. It is characterized in that the transport speed of the intermediate conveyor is reduced from the second speed to the first speed by the time the cloth is supplied to the intermediate conveyor.
In the fourth aspect of the invention, the cloth deploying device of the sixth invention determines the transfer speed of the intermediate conveyor when a preset delay time elapses from the time when the levitation detection sensor is not detected. It is characterized by decelerating from the second speed to the first speed.
In the first invention, the control unit receives a third speed, which is a transfer speed after the speed increasing position of the next process device, from the next process device, and the third speed is the third speed. The second speed is a value obtained by multiplying the speed by a predetermined coefficient.

According to the present invention, since the transport speed of the intermediate conveyor is increased during the transport of the cloth, the floating cloth can be submerged and the jump of the cloth can be suppressed.

It is a side view of the cloth unfolding apparatus which concerns on 1st Embodiment. It is a front view of the cloth unfolding device of FIG. However, the input section is omitted. It is a side view of the cloth unfolding device and a roll ironer at the start of transport. It is a side view of the cloth unfolding device and the roll ironer when the cloth reaches the acceleration position. It is a side view of the cloth unfolding device and a roll ironer at the time of ascending. It is a side view of the cloth unfolding device and a roll ironer after ascending. It is a timing chart which shows the change of the transfer speed of the intermediate conveyor in 1st Embodiment. It is a schematic diagram which showed the state of cloth at the connection part of two conveyors. It is a side view of the cloth unfolding apparatus which concerns on 3rd Embodiment. 9 is a cross-sectional view taken along the line XX in FIG. It is a timing chart which shows the change of the transfer speed of the intermediate conveyor in 3rd Embodiment. It is a side view of the cloth unfolding device and a roll ironer in a state where the cloth is raised. It is a side view of the cloth unfolding device and the roll ironer in the state after the cloth jumps.

Next, an embodiment of the present invention will be described with reference to the drawings.
[First Embodiment]
The cloth unfolding device 1 according to the first embodiment of the present invention unfolds square cloth C such as washed sheets, wrapping cloth (two-sheet cloth duvet cover), pillowcase, towel, and tablecloth. This is a device for supplying to the next process device such as a roll ironer. In the present specification, the front-back, left-right, and up-down directions of the cloth deploying device 1 are defined as shown in FIGS. 1 and 2.

(Basic configuration)
First, the basic configuration of the cloth deploying device 1 will be described together with the operation.
As shown in FIG. 1, the cloth deploying device 1 includes a machine frame 10. Further, the cloth deploying device 1 includes a control unit 11 that controls the operation of various devices described below. The control unit 11 is a computer composed of a CPU, a memory, and the like.

A loading section 20 is provided on the front surface of the machine frame 10 for the worker to load the cloth C. The number of input units 20 is not particularly limited, and may be one or a plurality. The loading unit 20 includes a loading chuck 21 that grips the cloth C and an elevator 22 that raises and lowers the loading chuck 21. The loading chuck 21 is provided at both left and right ends of a chuck base having a width about the width of a person's shoulder. Both end corners of one side of the cloth C are gripped by the left and right loading chucks 21 and 21.

By the operation of the elevator 22, the loading chuck 21 moves up and down between the loading position (position shown in FIG. 1) where the worker attaches the cloth C to the loading chuck 21 and the lifting position raised to the uppermost end. A worker manually attaches the cloth C to the loading chuck 21 which is waiting at the loading position. Then, the elevator 22 raises the cloth C together with the charging chuck 21.

A spreading portion 30 is provided at the raised position of the charging chuck 21. The extension portion 30 has a pair of extension chucks 31 and 31 that grip the corners at both ends of one side of the cloth C (see FIG. 2). Each extension chuck 31 is attached to a carriage 32 that can traverse along the rail. The left and right extension chucks 31 and 31 can traverse individually.

In the process of raising the charging chuck 21, the cloth C is delivered from the charging chuck 21 to the extension chuck 31. The pair of extension chucks 31 and 31 that have received the cloth C traverse so as to open to the left and right, so that the cloth C is suspended in the unfolded state (state of FIG. 2).

A shaping duct 41 and a blower 42 connected to the shaping duct 41 are provided in the lower part of the machine frame 10. The lower part of the cloth C suspended from the extension chuck 31 is inserted into the shaping duct 41. The shaping duct 41 sucks the cloth C downward. The wrinkles of the cloth C are removed by the air flow in the shaping duct 41.

A vacuum box 43 is arranged below the extension portion 30. The vacuum box 43 can move forward and backward. When the extension chuck 31 is opened after removing the wrinkles by the shaping duct 41, the upper end portion of the cloth C is attracted to the advanced vacuum box 43.

An intermediate conveyor 51 is arranged below the vacuum box 43. The conveyor belt of the intermediate conveyor 51 has a large number of small holes. Further, a vacuum box 44 is arranged below the transport surface of the intermediate conveyor 51. Therefore, the intermediate conveyor 51 can convey the cloth C while sucking it. A discharge conveyor 52 is connected to the end of the intermediate conveyor 51 (the end on the downstream side in the transport direction).

When the vacuum box 43 adsorbing the cloth C is moved backward, the upper end portion of the cloth C is transferred from the vacuum box 43 to the intermediate conveyor 51. At this time, the cloth C is adsorbed on the intermediate conveyor 51. The intermediate conveyor 51 conveys the deployed cloth C to the rear. Further, the discharge conveyor 52 discharges the cloth C backward toward the next process apparatus.

The intermediate conveyor 51 and the discharge conveyor 52 are connected in a valley shape. That is, the intermediate conveyor 51 has a downward gradient in the transport direction, while the discharge conveyor 52 has an upward gradient. As a result, the transport surface of the intermediate conveyor 51 and the transport surface of the discharge conveyor 52 form a V shape, and the connecting portion 53 thereof is recessed downward. When the intermediate conveyor 51 has a downward slope, the discharge conveyor 52 may be horizontal or may have a downward slope with a shallower angle than the intermediate conveyor 51. Further, when the discharge conveyor 52 has an upslope, the intermediate conveyor 51 may be horizontal or may have an upslope with a shallower angle than the discharge conveyor 52. Also in these cases, the intermediate conveyor 51 and the discharge conveyor 52 are connected in a valley shape.

Hereinafter, the end of the cloth C on the downstream side in the transport direction is referred to as a "front end" and the upstream side is referred to as a "rear end" with reference to the transport direction of the intermediate conveyor 51 and the discharge conveyor 52. The cloth C is conveyed with the front end as the head.

The shaping duct 41 is provided with a rear end sensor 12. The rear end sensor 12 is a sensor that can detect the presence or absence of the cloth C at the detection position. As the rear end sensor 12, a non-contact type sensor such as a photoelectric sensor or an ultrasonic sensor is preferably used. This embodiment is an example in which a photoelectric sensor is used as the rear end sensor 12. A diffuse reflection type photoelectric sensor is arranged on the back surface of the shaping duct 41. The diffuse reflection type photoelectric sensor detects the presence or absence of cloth C based on the presence or absence of light reflected by cloth C.

The optical axis (detection axis) of the rear end sensor 12 is in the shaping duct 41 and is arranged substantially horizontally along the front-rear direction. Further, the rear end sensor 12 is provided substantially in the center of the shaping duct 41 in the width direction (see FIG. 2). The rear end sensor 12 detects the presence or absence of the cloth C at this detection position to detect the passage of the rear end of the cloth C.

(Next process equipment)
Next, the next process apparatus will be described.
As shown in FIG. 3, a next process device is arranged behind the cloth deploying device 1. The next process device is a device that performs some processing on the developed cloth C. Examples of the next process device include a roll ironer, an inspection device, a folding device, and the like. Hereinafter, the case where the next process apparatus is the roll ironer 2 will be described as an example.

The roll ironer 2 is a device for ironing cloth C. The roll ironer 2 has an introduction conveyor 61. The cloth C supplied from the cloth unfolding device 1 is conveyed by the introduction conveyor 61 and introduced into the roll ironer 2. Further, the roll ironer 2 has one or more iron rolls 62. By transporting the cloth C while contacting the iron roll 62, the cloth C can be continuously ironed.

FIG. 3 shows a state at the time when the cloth C is supplied to the intermediate conveyor 51. Hereinafter, the position of the front end of the cloth C at the time of being supplied to the intermediate conveyor 51 is referred to as a supply position P1.

As shown in FIG. 4, the cloth C is conveyed by the intermediate conveyor 51, the discharge conveyor 52, and the introduction conveyor 61, and the front end reaches the first iron roll 62. The intermediate conveyor 51, the discharge conveyor 52 and the introduction conveyor 61, the conveying speed is set substantially to the same speed v _1.

After that, as shown in FIG. 5, the front end portion of the cloth C is pulled into the iron roll 62. The transport speed v ₃ of the iron roll 62 is set to be faster than the transport speed v ₁ of the intermediate conveyor 51 and the like. For example, the transfer speed v ₃ of the iron roll 62 is set to be about 5% faster than the transfer speed v ₁ of the intermediate conveyor 51 or the like.

The transport speed of the cloth C is increased at the introduction part of the first iron roll 62. The position where the transport speed of the cloth C becomes high in this way is referred to as the speed increasing position P2. The speed-increasing position P2 means a position in the next process device (roll ironer 2) of the cloth deploying device 1 in which the transport speed of the cloth C becomes faster than the transport speed v ₁ of the discharge conveyor 52. Therefore, the speed increasing position P2 is not limited to the introduction portion of the iron roll 62. For example, when the transfer speed of the introduction conveyor 61 is set to be faster than the transfer speed v ₁ of the discharge conveyor 52, the connection portion between the discharge conveyor 52 and the introduction conveyor 61 becomes the speed increasing position P2.

Cloth C is pulled in the conveying direction by the speed difference between the conveying speed v ₁ and the conveying speed v ₃ of the ironing roll 62 such as an intermediate conveyor 51. As a result, the occurrence of wrinkles can be suppressed and the wrinkles can be smoothed.

However, especially in the case of a long cloth C, since the front end is pulled leaving the rear part of the cloth C, the cloth C is formed at the connecting portion 53 between the valley-shaped intermediate conveyor 51 and the discharge conveyor 52. Float. If the transportation proceeds in this state, the rear end of the cloth C jumps and large wrinkles are generated (state in FIG. 13).

(Control of transport speed)
In order to suppress such jumping of the cloth C, the control unit 11 controls the transport speed of the intermediate conveyor 51 as described below. In the intermediate conveyor 51, the motor that rotates the drive roll is controlled by an inverter. By giving a speed signal to the inverter, the control unit 11 changes the rotation speed of the motor and controls the transfer speed of the intermediate conveyor 51.

As shown in FIG. 7, the control unit 11 sets the transfer speed of the intermediate conveyor 51 to the first speed v ₁ in the steady state. The first speed v ₁ is substantially the same as the transfer speed of the discharge conveyor 52 and the introduction conveyor 61. The first speed v ₁ is set so that the cloth C is pulled in the transport direction due to the speed difference from the iron roll 62 and the wrinkles of the cloth C can be smoothed. The first speed v ₁ is stored in the control unit 11 in advance.

At the start of transportation t ₁ (at the time of FIG. 3) when the cloth C is supplied to the intermediate conveyor 51, the transfer speed of the intermediate conveyor 51 is the first speed v ₁ . The control unit 11 determines that the time when the vacuum box 43 that delivers the cloth C to the intermediate conveyor 51 moves backward is t ₁ at the start of transportation.

During the first half of the period during which the intermediate conveyor 51 conveys one cloth C, that is, from t ₁ at the start of transportation to t ₂ at time, the control unit 11 maintains the transfer speed of the intermediate conveyor 51 at the first speed v ₁ . To do. Then, at time t ₂ , the control unit 11 increases the transfer speed of the intermediate conveyor 51 from the first speed v ₁ to the second speed v ₂ . The transport speed of the discharge conveyor 52 remains in the first speed v _1.

Here, the time t ₂ is the time when the cloth C floats up at the connecting portion 53 between the intermediate conveyor 51 and the discharge conveyor 52 (at the time of FIG. 5). Hereinafter, the time t ₂ will be referred to as the ascending time t ₂ . The control unit 11 sets the time when the predetermined ascent time T elapses from t ₄ when the front end of the cloth C reaches the acceleration position P ₂ (at the time of FIG. 4) as the ascending time t ₂ .

The intermediate conveyor 51 is provided with a transport distance detection sensor such as a rotary encoder. Further, the transport distance L1 from the supply position P1 to the speed increase position P2 is known. The control unit 11 determines that the time when the transport distance of the intermediate conveyor 51 measured from t ₁ at the start of transport reaches L1 is t ₄ when the front end of the cloth C reaches the speed increasing position P2. Alternatively, the control unit 11 obtains the conveyance speed v is divided by _1, the time required for the front end of the cloth C is conveyed from the feed position P1 to the speed increasing position P2 T1 of the transport distance L1 of the intermediate conveyor 51, conveyor The time when the time T1 elapses from the start time t ₁ may be determined as t ₄ when the front end of the cloth C reaches the speed increasing position P2. Further, a sensor for detecting the presence or absence of cloth C such as a photoelectric sensor is provided at the acceleration position P2, and when the sensor detects the front end of the cloth C, when the front end of the cloth C reaches the speed increase position P2. It may be judged as t ₄ .

The ascent time T is set as the time required for the cloth C to rise to a predetermined height at the connecting portion 53 after the front end of the cloth C reaches the acceleration position P2. The ascent time T is stored in the control unit 11 in advance.

The second speed v ₂ is set to a speed at which the raised cloth C can be submerged. The second speed v ₂ is stored in the control unit 11 in advance. The second velocity v ₂ is at least faster than the first velocity v ₁ . Further, in order to sink the raised cloth C, the second speed v ₂ needs to be faster than the transport speed v ₃ of the iron roll 62.

The control unit 11 maintains the transfer speed of the intermediate conveyor 51 at the second speed v ₂ during the latter half of the period during which the intermediate conveyor 51 conveys one cloth C, that is, from the time of ascent t ₂ to the time t _3. .. Then, at time t ₃ , the control unit 11 reduces the transfer speed of the intermediate conveyor 51 from the second speed v ₂ to the first speed v ₁ . Here, the time t ₃ is the time when the rear end of the cloth C reaches the connection portion 53 between the intermediate conveyor 51 and the discharge conveyor 52. That is, it is the time when the entire cloth C has passed through the intermediate conveyor 51 and the transportation of the cloth C by the intermediate conveyor 51 is completed. Hereinafter, the time t ₃ will be referred to as t ₃ at the end of transportation.

The rear end sensor 12 provided in the shaping duct 41 can detect the passage of the rear end of the cloth C. Further, the transport distance L2 from the detection position of the rear end sensor 12 to the connection portion 53 is known. The control unit 11 determines that when the transport distance of the intermediate conveyor 51 measured from t ₅ when the rear end sensor 12 detects the passage of the cloth C reaches L2, it is t ₃ at the end of transport. Alternatively, the control unit 11 obtains the conveyance speed v is divided by _2, the time required for the trailing end of the cloth C is conveyed from the detection position to the connecting portion 53 T2 of the transport distance L2 of the intermediate conveyor 51, the trailing edge when the sensor 12 the time T2 from t ₅ when detecting the passage of the cloth C has passed, it may be determined that the conveying end t _3. Further, a sensor for detecting the presence or absence of the cloth C such as a photoelectric sensor may be provided in the connection portion 53, and the time when the sensor detects the passage of the rear end of the cloth C may be determined as t ₃ at the end of transportation.

The timing for decelerating the transport speed of the intermediate conveyor 51 to the first speed v ₁ may be later than t ₃ at the end of transport. The conveying speed of the intermediate conveyor 51 it is sufficient to return to the first speed v ₁ before the next cloth C is fed to the intermediate conveyor 51. That is, the transport speed of the intermediate conveyor 51 may be reduced to the first speed v ₁ between t ₃ at the end of transport of the cloth C and t ₁ at the start of transport of the next cloth C. That way, even when the next cloth C is fed to the intermediate conveyor 51, it is possible to the conveying speed of the intermediate conveyor 51 and the first speed v _1.

When the transfer speed of the intermediate conveyor 51 is controlled in two stages as described above, the cloth C is conveyed as follows.
As shown in FIG. 3, first, the cloth C is supplied to the intermediate conveyor 51. The front end of the cloth C is located at the supply position P1. This time point is t ₁ at the start of transfer, and the transfer speed of the intermediate conveyor 51 is the first speed v ₁ .

After that, as shown in FIG. 4, the cloth C is conveyed by the intermediate conveyor 51, the discharge conveyor 52, and the introduction conveyor 61, and the front end reaches the speed increasing position P2. At this point, the transfer speed of the intermediate conveyor 51 at t ₄ remains the first speed v ₁ .

After that, as shown in FIG. 5, the cloth C is pulled into the iron roll 62, and the front end portion is conveyed at the transfer speed v ₃ of the iron roll 62. When the front end of the cloth C reaches the ascending position P3 advanced from the speed increasing position P2, the cloth C floats at the connecting portion 53 between the intermediate conveyor 51 and the discharge conveyor 52. This point is t ₂ at the time of ascent. Between the conveyance start time t ₁ to the flying time t _2, the conveying speed of the intermediate conveyor 51 is maintained at the first speed v _1. At the time of ascent t ₂ , the transfer speed of the intermediate conveyor 51 increases to the second speed v ₂ .

Thereafter, as shown in FIG. 6, as a result of a rear portion of the cloth C is transported at a second velocity v ₂ by the intermediate conveyor 51, cloth C which has lifted the connecting portion 53 is lowered.

Thereafter, when the trailing end of the cloth C has reached the connecting portion 53, i.e. the conveying end t _3, the conveying speed of the intermediate conveyor 51 returns to the first speed v _1. As a result, the next cloth C can be supplied to the intermediate conveyor 51.

As described above, by increasing the transfer speed of the intermediate conveyor 51 during the transfer of the cloth C, the cloth C floating at the connection portion 53 can be submerged. As a result, the jumping of the cloth C can be suppressed, and the occurrence of wrinkles due to the jumping can be prevented.

[Second Embodiment]
In the first embodiment, the ascent time T and the second speed v ₂ are parameters that the worker adjusts while checking the state of the actual machine. The worker sets the ascent time T by observing the timing at which the cloth C floats at the connection portion 53. In addition, the worker sets the second speed v ₂ so that the surfaced cloth C sinks. In this way, adjustment work by workers is required. On the other hand, in the second embodiment, the control unit 11 automatically sets the ascent time T and the second speed v ₂ .

In the present embodiment, speed information is input from the next process apparatus (roll ironer 2) to the control unit 11. This speed information is the transfer speed v ₃ after the speed increase position P2 of the next process apparatus (roll ironer 2). Hereinafter, the transport speed v ₃ will be referred to as a third speed v ₃ .

FIG. 8 schematically shows the state of the cloth at the connecting portion of the two conveyors 51 and 52 connected in a valley shape. The solid line shows the cloth C1 in a state where it does not float. The raised cloth C2 is shown by a alternate long and short dash line. When the rear end of the cloth C1 and the rear end of the cloth C2 are at the same position, the front end of the raised cloth C2 is advanced by a distance L from the front end of the cloth C1. In other words, the front end of the cloth C2 has gone too far by the distance L, so that the cloth C2 is lifted. Hereinafter, the distance L is referred to as a passing distance L.

The passing distance L when the cloth C2 rises from the connecting portion by the height H is geometrically obtained from the connecting angles of the two conveyors 51 and 52. Therefore, when the floating height H of the allowable limit is set, the corresponding passing distance L can be obtained. The passing distance L is preset and stored in the control unit 11.

The control unit 11 sets the ascent time T by the following procedure. First, the control unit 11 obtains the speed difference dv (= v ₃ −v ₁ ) between the input third speed v ₃ and the first speed v ₁ . Next, the control unit 11 divides the passing distance L by the speed difference dv to obtain the ascent time T (= L / dv). Thus, the control unit 11 can set the floating time T on the basis of the third speed v _3. The ascent time T is used to determine the arrival of t ₂ at the time of ascent. That is, the control unit 11 sets the time when the ascending time T elapses from t ₄ when the front end of the cloth C reaches the speed increasing position P ₂ as the ascending time t ₂ .

Further, the control unit 11 sets the second speed v ₂ by the following procedure. That is, the control unit 11 sets the value obtained by multiplying the input third speed v ₃ by a predetermined coefficient k as the second speed v ₂ (= k · v ₃ ). Here, the coefficient k is set to a value larger than 1. For example, if k = 1.05, the second speed v ₂ can be set to a speed 5% faster than the third speed v ₃ .

As described above, according to the present embodiment, the ascent time T and the second speed v ₂ can be automatically set based on the third speed v ₃ . Therefore, no adjustment work is required by the worker.

[Third Embodiment]
In the first and second embodiments, it is not detected whether or not the cloth C is actually raised. The same control is performed on all of the cloth C supplied to the cloth deploying device 1. On the other hand, in the third embodiment, the floating of the cloth C is detected and the control is performed based on the detection.

As shown in FIG. 9, the cloth deploying device 1 of the present embodiment has a levitation detection sensor 13. The levitation detection sensor 13 is a sensor that can detect the presence or absence of the cloth C at the detection position, and a non-contact type sensor such as a photoelectric sensor or an ultrasonic sensor is preferably used. This embodiment is an example in which a photoelectric sensor is used as the levitation detection sensor 13.

The optical axis (detection axis) of the levitation detection sensor 13 is above the connecting portion 53 between the intermediate conveyor 51 and the discharge conveyor 52, and is arranged substantially horizontally along the width direction of the machine frame 10. Therefore, the levitation detection sensor 13 can detect the levitation of the cloth C at the connection portion 53.

As shown in FIG. 10, a floodlight and a light receiver of the photoelectric sensor constituting the levitation detection sensor 13 are arranged on the left and right side walls of the discharge conveyor 52, respectively. Depending on the specifications of the photoelectric sensor, a sensor having a light emitting portion and a light receiving portion may be arranged on one side wall, and a reflector may be arranged on the other side wall.

It is difficult to detect a cloth C having no thickness from the side. Therefore, the optical axis (detection axis) of the levitation detection sensor 13 is arranged so as to be slightly inclined with respect to the horizontal. As a result, the detection shaft is arranged obliquely with respect to the cloth C, and the presence of the cloth C can be easily detected.

The control unit 11 of the present embodiment controls the transfer speed of the intermediate conveyor 51 as follows.
As shown in FIG. 7, at t ₁ at the start of transfer, the control unit 11 sets the transfer speed of the intermediate conveyor 51 to the first speed v ₁ . Then, at the time of ascent t ₂ , the control unit 11 increases the transfer speed of the intermediate conveyor 51 from the first speed v ₁ to the second speed v ₂ . Here, the control unit 11 sets the time when the levitation detection sensor 13 detects the levitation of the cloth C as the levitation time t ₂ . Therefore, the timing at which the cloth C actually floats can be set as t ₂ at the time of floating. Then, in the transport end time t _3, the control unit 11 decelerates the conveying speed of the intermediate conveyor 51 from the second speed v ₂ to the first speed v _1.

The control unit 11 may control the transfer speed of the intermediate conveyor 51 as follows.
As shown in FIG. 11, the control unit 11 increases the transport speed of the intermediate conveyor 51 from the first speed v ₁ to the second speed v ₂ at the time of ascent t ₂ when the levitation detection sensor 13 detects the levitation of the cloth C. .. As a result of increasing the speed of the intermediate conveyor 51, the floating cloth C descends. As a result, the levitation detection sensor 13 is in a non-detection state. The time when the ascent detection sensor 13 is not detected is defined as t ₆ when descending.

The control unit 11 reduces the transport speed of the intermediate conveyor 51 from the second speed v ₂ to the first speed v ₁ when the preset delay time Td elapses from the descending t ₆ . Then, when the floating detection sensor 13 maintains the non-detection state, the control unit 11 maintains the conveying speed of the intermediate conveyor 51 to the first speed v _1.

If the floating detection sensor 13 becomes again detection state, the controller 11 accelerated the conveying speed of the intermediate conveyor 51 to the second speed v _2. Then, again, when the delay time Td elapses from the descending t ₆ , the transport speed of the intermediate conveyor 51 is reduced to the first speed v ₁ .

As described above, in the present embodiment, it is detected that the cloth C is actually lifted, and the speed of the intermediate conveyor 51 is increased as necessary. As a result, the raised cloth C can be submerged, and the jumping of the cloth C can be suppressed.

1 Cloth unfolding device 11 Control unit 20 Input unit 30 Extension unit 51 Intermediate conveyor 52 Discharge conveyor 53 Connection unit 2 Roll ironer 61 Introduction conveyor 62 Iron roll C Cloth

Claims (7)

A cloth unfolding device that unfolds cloth and supplies it to the next process device.
An intermediate conveyor that conveys the unfolded cloth and
A discharge conveyor that is connected to the end of the intermediate conveyor and discharges the cloth to the next process apparatus.
A control unit that controls the operation of the intermediate conveyor is provided.
The control unit
The transport speed of the intermediate conveyor at the start of transport when the cloth is supplied to the intermediate conveyor is set as the first speed.
A cloth unfolding device characterized in that the transport speed of the intermediate conveyor is increased from the first speed to the second speed when the cloth floats up at a connection portion between the intermediate conveyor and the discharge conveyor. The cloth according to claim 1, wherein the control unit sets a time when a preset levitation time elapses from the time when the front end of the cloth reaches the speed increasing position of the next process apparatus as the levitation time. Type deployment device. The control unit
The third speed, which is the transfer speed after the speed-increasing position of the next process device, is input from the next process device.
Find the speed difference between the third speed and the first speed,
The ascent time is calculated by dividing the preset line passing distance by the speed difference.
The cloth unfolding device according to claim 1, wherein the time when the ascending time elapses from the time when the front end of the cloth reaches the speed-increasing position is defined as the ascending time. A levitation detection sensor for detecting the levitation of the cloth at the connection portion is provided.
The cloth deploying device according to claim 1, wherein the control unit sets the time when the floating detection sensor detects the floating of the cloth as the floating time. The control unit uses the intermediate conveyor at the end of transportation when the rear end of the cloth reaches the connection portion, or between the end of the transportation and the time when the next cloth is supplied to the intermediate conveyor. The cloth deploying device according to any one of claims 1 to 4, wherein the transport speed of the cloth is reduced from the second speed to the first speed. The control unit is characterized in that the transport speed of the intermediate conveyor is reduced from the second speed to the first speed when a preset delay time elapses from the time when the levitation detection sensor is not detected. The cloth unfolding device according to claim 4. The control unit
The third speed, which is the transfer speed after the speed-increasing position of the next process device, is input from the next process device.
The cloth deploying device according to claim 1, wherein a value obtained by multiplying the third speed by a predetermined coefficient is defined as the second speed.

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