JPH08104446A - Sheet body detection and device thereof - Google Patents

Abstract

PURPOSE: To surely detect presence/absence of a sheet element and easily take out a sheet body with a simple structure. CONSTITUTION: This device is provided with a detection roller 92 mounted so as advance and retreat to/from a traveling mechanism, an optical sensor 94 which detects the bottom surface of a film F or a magazine M by stopping the detection roller 92 at a stacking position within a magazine M, and a pressure sensor 96 for discriminating the presence/absence of the film F by detecting the pressure conditions of the first and second suction pads 32, 34 when carrying out suction by the first and second suction pads 32, 34 after moving the first and second suction pads 32, 34 by a prescribed distance toward a stacking position from a position where the relative movement of the detection roller 92 has been detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet body detecting method and apparatus for detecting the presence / absence of sheet bodies laminated on a laminated plate.

[0002]

2. Description of the Related Art Conventionally, a plurality of sheets, for example,
A take-out device is widely used in which the film on which the image information is recorded is stacked and inserted in a magazine, and the films in the magazine are sucked and held by a suction plate, taken out one by one, and fed to the automatic developing device side. There is.

In this case, it is necessary to automatically detect the presence / absence of a film in the magazine in order to carry out an efficient and reliable film removal operation. So, for example,
A hole is provided in the film tray for stacking films,
When the film detector moves from the home position to a predetermined position, the film detector contacts the film surface and outputs an ON signal to detect the presence of the film, while the film detector detects the presence of the hole. There is known a device which is inserted into a unit and does not output an ON signal, thereby detecting the absence of a film.

However, the above-mentioned apparatus has a problem that it cannot be applied to a bright room loading using a magazine because the hole is formed in the film tray. This is because when the magazine has holes, light is introduced into the magazine and the film is exposed.

Therefore, when the film mounting surface in the magazine is formed with irregularities and the suction plate is sucked after moving from the home position to a predetermined position through the moving mechanism, the pressure state of the suction plate is changed. A detection device is used. In this device, if the suction plate is in contact with the film surface, a predetermined negative pressure state is obtained, while if this suction plate is engaged with the uneven portion, air leakage occurs and the predetermined negative pressure is obtained. The state is not obtained, and the presence or absence of the film is detected by this.

[0006]

However, the height of the film mounting surface is different for each magazine, and in the above-mentioned prior art, the same device moves forward and backward with the same stroke in order to deal with various magazines. The suction plate must be able to move forward and backward with respect to the moving mechanism. Therefore, normally
It has been pointed out that a relief structure including a coil spring and the like is adopted, and the overall structure of the device is complicated.

Moreover, since the suction plate is pressed against the film surface by a coil spring or the like with an excessive force,
It becomes easy for the films to adhere to each other, and when the top film is taken out by the suction disk, a plurality of films may be taken out at the same time. Therefore, it has been pointed out that the film cannot be efficiently taken out one by one.

The present invention solves this kind of problem and has a simple structure, which can surely detect the presence or absence of the sheet body and can smoothly perform the sheet body take-out operation. An object is to provide a body detection method and device.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is a sheet body for detecting the presence / absence of a sheet body laminated on a laminate having irregularities on the surface. A method of detecting, wherein a suction plate for sucking the sheet body is moved toward the laminated plate under the action of a moving mechanism, and the suction plate is moved back and forth toward the surface of the sheet body in the vicinity of the suction plate. A detection member that is freely provided and that moves back and forth integrally with the suction plate under the action of the moving mechanism,
A step of detecting the sheet body or the laminated board by contacting and stopping the sheet body or the laminated board, and detecting the sheet body or the laminated board by the detecting step, and then attaching the suction plate to the laminated board. Toward a predetermined distance, after moving the suction disk by the predetermined distance, performing suction by the suction disk and detecting the pressure state of the suction disk, and the detected pressure state. A step of detecting the presence or absence of the sheet body based on
It is characterized by having.

According to a second aspect of the present invention, in the sheet body detecting method according to the first aspect, the step of detecting the pressure state of the suction plate after moving the suction plate by the predetermined distance. When the presence of the sheet body is not detected, at least one of the initial setting of the moving mechanism and the display indicating that the sheet body is not present is performed.

According to a third aspect of the present invention, there is provided a sheet body detecting method for detecting the presence / absence of a sheet body laminated on a laminated plate, comprising a suction plate for sucking the sheet body.
A step of moving toward the laminated plate under the action of a moving mechanism; and a step of advancing and retracting in the vicinity of the suction plate toward the surface of the sheet body, and being integrated with the suction plate under the action of the moving mechanism. A step of detecting the sheet body or the laminated plate by stopping the detection member that moves forward and backward in contact with the sheet body or the laminated plate, and the moving mechanism for taking out the sheet body. If the detection member does not detect the sheet body or the laminated plate when the suction plate is moved toward the laminated plate from the initial state by a predetermined distance, the apparatus is stopped and an error is displayed. Characterize.

According to a fourth aspect of the present invention, there is provided a sheet body detecting device for detecting the presence or absence of a sheet body laminated on a laminated plate having an uneven surface, which is an adsorption device for adsorbing the sheet body. A moving mechanism that moves the board toward and away from the stacking position, and is provided in the vicinity of the suction board, and projects a predetermined distance from the suction surface of the sheet body of the suction board toward the sheet body, and A detection member that is provided so as to move forward and backward toward the surface of the sheet body and that moves forward and backward integrally with the suction plate under the action of the moving mechanism; and the detection member comes into contact with the sheet body or the laminated plate and stops. By doing so, the position detecting means for detecting the sheet body or the laminated plate and the suction plate are separated by a predetermined distance from the position where the detection member detects the sheet body or the laminated plate toward the laminated plate. After moving only when performing suction by the suction cup, characterized in that it comprises a pressure detecting means for detecting the pressure state of the suction cup.

According to a fifth aspect of the present invention, in the sheet body detecting device according to the fourth aspect, the pressure for detecting the pressure state of the suction plate after the suction plate is moved by the predetermined distance. When the detection means does not detect the presence of the sheet body, the detection means is provided with a control means for performing at least one of initial setting of the moving mechanism and display indicating that the sheet body does not exist.

According to a sixth aspect of the present invention, there is provided a sheet body detecting device for detecting the presence or absence of a sheet body laminated on a laminated plate, wherein a suction plate for adsorbing the sheet body is provided at the stacking position. And a moving mechanism for advancing and retracting toward the suction plate, the suction plate of the suction plate protruding from the suction surface of the sheet body to the sheet body side while maintaining a predetermined distance, and on the surface of the sheet body. A detection member that is provided so as to move forward and backward toward the suction plate under the action of the moving mechanism, and the detection member comes into contact with the sheet body or the laminated plate to stop, Position detecting means for detecting the sheet body or the laminated plate,
When the position detecting unit does not detect the sheet body or the laminated plate after the suction mechanism is moved by a predetermined distance toward the laminated plate from the initial state of taking out the sheet body from the moving mechanism. And a control means for stopping the device and displaying an abnormality.

According to a seventh aspect of the present invention, in the sheet body detecting apparatus according to any one of the fourth to sixth aspects, the detecting member also functions as a sheet body feeding roller. To do.

[0016]

In the sheet body detecting method and apparatus according to the first and fourth aspects of the present invention, when the suction plate and the detecting member are moved toward the stacking position of the sheet bodies under the action of the moving mechanism, first, The detection member comes into contact with the sheet body or the laminated plate at the stacking position and stops, and after the detection member detects the sheet body or the laminated plate, the suction plate moves toward the stacking position by a predetermined distance, and the suction plate. Is performed, and the pressure state of the suction plate is detected. Therefore, since the suction member is moved by a predetermined distance with reference to the position where the detection member actually abuts the sheet body, even if the heights of the stacking surfaces are different, the presence or absence of the sheet body can be easily determined with a simple structure. It is possible to reliably detect.

In the sheet body detecting method and apparatus according to the second and fifth aspects of the present invention, when the pressure member of the suction plate is not detected after the detection member detects the relative movement with the suction plate,
That is, when the presence of the sheet body is not detected, the apparatus is returned to the initial state and the operator is notified of the end.

In the sheet body detecting method and apparatus according to the third and sixth aspects of the present invention, the suction plate and the detecting member are moved from the initial state for taking out the sheet body to the stacking position of the sheet bodies under the action of the moving mechanism. When moving toward the moving mechanism, if the detecting member does not detect relative movement with the suction cup even after moving the moving mechanism for a predetermined distance, the detecting member is damaged and cannot be detected, or the moving mechanism is driven. Since it is considered that the motor is out of step and does not move for a predetermined distance, the device is stopped and an error is displayed.

In the sheet body detecting apparatus according to the seventh aspect of the present invention, the detecting member for detecting the relative movement with the suction plate is attached to the other apparatus, for example, the automatic developing machine after the uppermost sheet body is sucked. When automatically sending, the idle roller for sending is also used.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sheet body detecting method and apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates an auto feeder incorporating the sheet body detecting apparatus according to this embodiment. The auto feeder 10 adsorbs the films (sheets) F loaded in a stack and takes them out one by one, and then automatically sends them to another device, for example, an automatic developing machine 12. The film F is laminated on a plurality of ribbons R arranged on the bottom surface (laminated plate) of the magazine M.

The auto feeder 10 has a housing 14,
The opening 1 is formed in the inclined surface 16 provided in a part of the housing 14.
8 is formed, and a magazine M in which a plurality of films F are laminated
However, it is configured such that it can be loaded into the housing 14 from the opening 18 in a light-shielded state. A pump 24 is arranged in a lower corner portion of the housing 14, and the pump 24 sucks air through a suction hole portion formed in a suction plate to be described later, thereby negatively pressing the suction plate. Put in a state.

A shutter 26 is provided on the rear wall surface of the housing 14.
Is arranged so that the opening 28 can be opened and closed. The opening 28 is
In order to feed the film F to the automatic developing machine 12 side, it is configured to be opened only when it is conveyed. Specifically, the displacement operation of the shutter 26 is performed via a solenoid, a motor or the like (not shown).

Inside the housing 14, the sheet take-out device 3 is provided.
As shown in FIGS. 1 to 3, the sheet body take-out device 30 includes first and second suction cups 32 and 34 for sucking the loaded film F, and the first and second suction cups 32 and 34.
A moving mechanism 36 for moving the suction plates 32, 34 forward and backward with respect to the film F, the tips of the films F on the first and second suction plates 32, 34 side, and the first and second suction plates 3
The film F, which is located between 2 and 34, moves forward and backward integrally with the suction cups 32 and 34 under the action of the moving mechanism 36 to press the film F moved from the stacking position to the stacking position. And a pressing member 38 for returning.

As shown in FIG. 2, the moving mechanism 36 has a first
A first motor 42 fixed to the side plate 40 is provided.
The chain sprocket means 48 is engaged with the rotating shaft 44 of the motor 42 via the gear train 46. A guide shaft 52 is fixed to a chain 50 which constitutes the chain / sprocket means 48, and the guide shaft 52 is engaged at its other end side with an arm member 54 disposed inside the first side plate 40 and at substantially the center thereof. The shaft member 56 has a bent portion.

The shaft member 56 engages with a guide groove 58 formed in the first side plate 40, extends into the inside of the first side plate 40, and is swingable on the first side plate 40 via a shaft 60. It is freely displaceable in the guide groove 64 of the fork 62 fixed to the. A bearing 65 is supported by the arm member 54 above the shaft member 56.
Rolls in the guide groove 64 of the fork 62. The fork 62 is pulled in the direction of arrow a by the coil spring 66, while the swinging range of the fork 62 is restricted by the stopper portion 68 (see FIG. 1). When the stopper 68 abuts the forks 62, the stoppers 68 guide the guide grooves 6 of the left and right forks 62.
4 and the guide grooves of the first and second side plates 40, 40a substantially coincide with each other.

As shown in FIG. 2, the second side plate 40a side is
The first side plate 40 has the same configuration as that of the first side plate 40. The same components are designated by the same reference numerals, and detailed description thereof will be omitted.

The square bar body 70 is integrally bridged to the left and right arm members 54, and the first and first support members 72 and 74 extending downward from the square bar body 70 are provided with coil springs 76 and 78 therebetween. The two holding members 80 and 82 are cantilevered and symmetrically arranged (see FIG. 2). First and second
The holding members 80 and 82 are supported by a fulcrum 89 provided on the bulging portion 84 protruding downward from the square rod body 70. The first and second suction plates 32 and 34 and the pressing member 38 are fixed to the first and second holding members 80 and 82.

The sheet body take-out device 3 having the above-mentioned structure
At 0, the sheet body detection device 90 according to the present embodiment is mounted. The sheet body detection device 90 includes the first and second suction plates 3
A moving mechanism 36 for advancing and retracting 2, 34, and FIGS.
As shown in FIG. 3, a detection roller (detection member) 92 that is provided so as to be movable back and forth with respect to the first and second suction plates 32 and 34,
The detection roller 92 is stopped at the stacking position in the magazine M to detect the film F or the bottom surface of the magazine M, which is an optical sensor 94, and the first and second suction plates 32 and 34. After the relative movement of the detection roller 92 is further moved toward the stacking position side by a predetermined distance, the first and second suction cups 3 are moved.
When performing suction with 2, 34, the first and second suction cups 3
The pressure sensor 96 is a pressure detection unit that detects the pressure states of the pressure sensors 2 and 34.

The detection roller 92 is arranged on the lower side of the bulging portion 84 so as to be rotatable and movable back and forth. As shown in FIG. 4, a bracket 98 for supporting the detection roller 92 has a bearing 1
It is supported by the bulging portion 84 via 00 and is pressed in the Y direction via the spring 101. A detector 102 for turning on / off the optical sensor 94 is fixed to the bracket 98. When no external load is applied to the detection roller 92, the lower end of the peripheral surface of the detection roller 92 is the first
Also, the second suction plates 32, 34 project from the suction surfaces 32a, 34a of the second suction disks 32, 34 by a distance H _{1 in the} arrow Y direction. On the other hand, in this state, the detector 102 drives the optical sensor 94 by a distance in the Y direction. Separated by H ₂ .

The pressure sensor 96 is arranged on the way of the pipe line 104 which connects the pump 24 and the first and second suction plates 32 and 34, and the pressure sensor 96, the optical sensor 94 and the pump 24 are controlled. It is connected to the unit (control means) 106 (see FIG. 4).

As shown in FIG. 1, a first roller 122 is provided in the housing 14 near the lower end of the magazine M, and a second roller 124 is provided adjacent to the first roller 122. The second roller 124 is a displaceable third roller 12
6 is in sliding contact with the third roller 126, and the third roller 126 is provided with a detection unit 128 that detects the amount of displacement when the third roller 126 is displaced slightly obliquely with respect to the vertical direction. Although not shown, a belt wheel is provided on each of the first and second rollers 122 and 124, and a belt wheel 132 is mounted on the belt wheel and a rotation drive shaft of a second motor 130 arranged below the belt wheel. The round belt 134 is bridged.

The belt wheel 132 of the second motor 130 has
The other round belt 136 is bridged, and this round belt 136 is arranged in the vicinity of the opening 28 of the housing 14 to form the roller 13
It is suspended on a belt wheel (not shown). Roller 13
A roller 140 is provided above the roller 8.
0 functions as a so-called idle roller which is configured to be vertically displaceable. A guide plate 142 is provided between the housing 14 and the automatic developing machine 12 and extends from the inside of the housing 14 toward the automatic developing machine 12 side through the opening 28.

Next, the operation of the sheet body detecting apparatus 90 according to this embodiment having the above-described configuration will be described with reference to the flowchart shown in FIG. 6 in relation to the auto feeder 10 incorporating the sheet body detecting apparatus 90.

First, a magazine M, which stores a plurality of films F stacked one on top of another, has an opening 1 defined on the inclined surface 16.
After being loaded in No. 8, the first motor 42 constituting the moving mechanism 36 is rotated in the direction of arrow A ₁ (see FIG. 1). Therefore, the chain / sprocket means 48 is driven via the gear train 46, and the guide shaft 52 fixed to the chain 50 along with the arm member 54 along the guide groove 58 is located at the lower left side in FIG. Direction).

When the arm member 54 moves in the arrow Y direction, the first and second suction plates 32, 34 descend (in the arrow Y direction) (step S1), and whether the photosensor 94 is turned on by the detector 102. It is determined whether or not the surface has been detected (step S2). And
Damage to the optical sensor 94 or the detector 102 or the first motor 4
Even if the supply of the first set pulse amount is completed due to step out of step 2 or the like, the optical sensor 94 is not turned on (Y in step S3).
ES), the error signal is output in step S4,
The sheet body detection device 90 stops and displays an abnormality.

When the arm member 54 descends, the detection roller 9 descends integrally with the first and second suction cups 32 and 34.
2 first comes into contact with the uppermost film F of the magazine M. When the arm member 54 is further lowered by the distance H ₁ , the bracket 98 is raised by the distance H ₁ relative to the arm member 54, and the detector 102 fixed to the bracket 98 drives the optical sensor 94. . As a result, the surface is detected (YES in step S2), and the first
The second suction plates 32, 34 are decelerated to a predetermined speed, and the second set pulse amount is supplied to the first motor 42.

Here, as shown in FIG. 4, the detection roller 9
2 and the suction surface 3 of the first and second suction plates 32, 34
When the distance H ₁ between 2a and 34a is 6 mm and the distance H ₂ between the detector 102 and the optical sensor 94 is 2.5 mm, the lower end of the detection roller 92 and the suction surface 3 when surface detection is performed.
The distance between 2a and 34a is 3.5 mm (6-2.5). When the amount of deformation of the suction surfaces 32a, 34a caused by the contact between the first and second suction disks 32, 34 with the film F is 0.5 mm, the first and second suctions are performed after the surface is detected. It is necessary to lower the boards 32 and 34 by 4 mm. Therefore, assuming that the moving distance of one panel of the first motor 42 is 0.1 mm, it is sufficient to supply only 40 panels to the first motor 42 (step S5).

Next, in step S6, the pump 24
Is driven, and ON / OFF of the pressure sensor 96 is detected (step S7). First and second suction cups 3
When the film F is adsorbed by 2, 34, a predetermined negative pressure state is generated in the pipe line 104 communicating with the first and second adsorption discs 32, 34, and the pressure sensor 96 is turned on (step S7). Yes). Therefore, the first motor 42 is rotated in the direction of the arrow A ₂ and the first and second suction plates 32, 3
The uppermost film F, the tip of which is held by 4, moves in the direction of arrow X along the guide groove 58 of the first side plate 40 (step S8).

While the arm member 54 is moving in the direction of the arrow X, the shaft member 56 engages with the guide groove 64 of the fork 62 to swing the fork 62 to the position shown by the solid line in FIG. The film F sucked by the second suction plates 32 and 34 reaches the first roller 122 and is sandwiched between the detection roller 92 and the first roller 122. At that time, the driving of the pump 24 is stopped (step S9).

Therefore, the second motor 130 is energized, and the first and second rollers 12 are rotated by the circular belt 134.
When 2 and 124 are rotated in the direction of arrow B, the film F separated from the first and second suction cups 32 and 34 is nipped by the first roller 122 and the detection roller 92 and conveyed, and is conveyed to the second roller 124. Move up. That is, the detection roller 92 has a function as an idle roller for sending out the film F. Here, whether or not the film F is a plurality of films is determined by the thickness of the film F via the detection unit 128.

Next, the film F includes a roller 138 and a roller 1 which rotate in the direction of arrow C via a round belt 136.
It is sandwiched by 40 and reaches the guide plate 142, and the automatic processor 1
It is transported to the 2 side.

On the other hand, after the film F sucked by the first and second suction plates 32 and 34 is sent to the first roller 122 side, the process returns to step S1 to take out a new film F. When all the films F in the magazine M are taken out, the detection roller 92 and the first and second suction cups 32 and 34 come into contact with the ribbon R, respectively, as shown in FIG. Therefore, when the pump 24 is driven, the external air is sucked into the first and second suction plates 32 and 34, and the pressure sensor 96 is not turned on even when the supply of the second set pulse amount is completed in step S10. . As a result, it is detected that there is no film F in the magazine M,
At step S11, the pump 24 is stopped, and at the same time, the first motor 42 rotates in the arrow A ₂ direction, and the first and second suction plates 32 and 34 and the detection roller 92 move in the arrow X direction. Further, the detection roller 92 is the first roller 122.
When the optical sensor 94 detects the detector 102 in contact with
The first motor 42 stops, and the home position is reached. Initialization is performed in this state.

As described above, according to this embodiment, after the detection roller 92 comes into contact with the uppermost film F and the optical sensor 94 is driven, the first and second suction plates 32 and 34 are moved to this film F. The film F is moved by a predetermined distance, and the steps of sucking the film F and detecting the pressure are performed. Therefore, the first and second suction plates 32 and 34 are moved by a predetermined distance with reference to the position where the detection roller 92 actually abuts on the uppermost film F, so that the height of the mounting surface of each magazine M increases. Even if they are different in size, the work of detecting the presence or absence of the film F can be performed easily and reliably.

As a result, the first and second suction cups 32,
It is not necessary to adopt a relief structure capable of advancing and retracting 34 with respect to the arm member 54, and it is possible to perform the presence / absence detection work of the film F with high accuracy with a simple structure. Moreover,
There is an effect that the first and second suction plates 32 and 34 are not pressed against the film F with an unnecessarily large force, the adhesion between the films F is effectively prevented, and the film taking-out work can be efficiently performed. can get.

In this embodiment, the magazine M having a plurality of ribbons R arranged on the bottom surface has been described. However, for example, the magazine M ₁ shown in FIG. 8 can be used.
This magazine M ₁ is provided with an embossed surface E on the bottom surface, and when suction is performed while the first and second suction plates 32, 34 are in contact with the embossed surface E, the external air causes the first air It is introduced into the second suction cups 32 and 34. Therefore, even if the magazine M ₁ is used instead of the magazine M,
The same effect can be obtained.

[0047]

According to the sheet body detecting method and apparatus of the present invention, the following effects and advantages can be obtained.

Since the suction plate is moved by a predetermined distance based on the position where the detection member actually abuts the sheet body, even if the heights of the laminated surfaces are different, the presence or absence of the sheet body can be easily achieved with a simple structure. And it becomes possible to detect reliably. Moreover, since the suction disk is not pressed against the sheet body with an excessive force, it is possible to prevent the sheet bodies from sticking to each other and efficiently perform the sheet body take-out work.

Further, with a simple structure, it is possible to inform the operator that there is no abnormality in the apparatus or that there is no sheet body.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a main part of an automatic feeder incorporating a sheet body detection device according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional front view of a sheet body take-out device and the sheet body detection device that form the automatic feeder.

FIG. 3 is a perspective view of a main part of the sheet body take-out device.

FIG. 4 is a front view of a main part of the sheet body detection device.

FIG. 5 is a partial cross-sectional side view of the sheet detection device.

FIG. 6 is a flowchart illustrating a sheet body detection method of the present invention.

FIG. 7 is an operation explanatory view of the sheet body detection device.

FIG. 8 is an explanatory diagram of another magazine.

[Explanation of symbols]

10 ... Auto feeder 24 ... Pump 30 ... Sheet body take-out device 32, 34 ... Suction board 36 ... Moving mechanism 38 ... Pressing member 42 ... Motor 54 ... Arm member 90 ... Sheet body detecting device 92 ... Detecting roller 94 ... Optical sensor 96 ... The pressure sensor 102 ... detectors 104 ... line E ... embossed surface F ... film M, M ₁ ... magazine R ... ribbon

Claims (7)

[Claims] 1. A sheet body detecting method for detecting the presence / absence of a sheet body laminated on a laminated plate having a concavo-convex surface, wherein an adsorption plate for adsorbing the sheet body is operated under the action of a moving mechanism. A step of moving toward the laminated plate, and a detection member which is provided in the vicinity of the suction plate so as to move back and forth toward the surface of the sheet body, and which moves forward and backward integrally with the suction plate under the action of the moving mechanism. However, a step of detecting the sheet body or the laminated board by contacting and stopping the sheet body or the laminated board; and, after detecting the sheet body or the laminated board by the detecting step, the suction plate is laminated to the laminated body. A step of moving a predetermined distance toward the plate; a step of moving the suction plate by the predetermined distance, then performing suction by the suction plate and detecting a pressure state of the suction plate; Sheet detection method characterized by having the steps of detecting the presence or absence of the sheet on the basis of the issued pressure state. 2. The sheet detection method according to claim 1, wherein the presence of the sheet is not detected in the step of detecting the pressure state of the suction plate after moving the suction plate by the predetermined distance. The method for detecting a sheet body, wherein at least one of the initial setting of the moving mechanism and the display indicating that the sheet body does not exist is performed. 3. A sheet body detecting method for detecting the presence / absence of sheet bodies laminated on a laminated plate, comprising: adhering a suction plate for adsorbing the sheet body to the laminated plate under the action of a moving mechanism. And a step of moving the sheet body toward the surface of the sheet body in the vicinity of the suction plate, and the detection member that integrally moves with the suction plate under the action of the moving mechanism is the sheet body. Or a step of detecting the sheet body or the laminated board by abutting against the laminated board and stopping the laminated body, the moving mechanism is set to the laminated board from the initial state for taking out the sheet body. A sheet body detection method, wherein when the detection member does not detect the sheet body or the laminated plate when the sheet body is moved toward a predetermined distance, the apparatus is stopped and an abnormality is displayed. 4. A sheet body detecting device for detecting the presence / absence of a sheet body laminated on a laminated plate having an uneven surface, wherein a suction plate for adsorbing the sheet body is moved forward and backward toward the stacking position. And a moving mechanism that is provided in the vicinity of the suction plate, protrudes from the suction surface of the sheet body of the suction plate to the sheet body side while maintaining a predetermined distance, and is movable back and forth toward the surface of the sheet body. And a detection member that moves forward and backward integrally with the suction plate under the action of the moving mechanism, and the detection member comes into contact with the sheet body or the laminated plate to stop, thereby the sheet body or the A position detecting unit for detecting a laminated plate, and the suction plate after moving the suction plate by a predetermined distance from the position where the detection member detects the sheet body or the laminated plate toward the laminated plate, When performing suction by the board,
A sheet detecting device comprising: a pressure detecting unit that detects a pressure state of the suction plate. 5. The sheet body detecting apparatus according to claim 4, wherein after the suction plate is moved by the predetermined distance, the pressure detecting means for detecting the pressure state of the suction plate detects the presence of the sheet body. A sheet body detection apparatus comprising a control means for performing at least one of an initial setting of the moving mechanism and a display indicating that the sheet body does not exist when the sheet body is not detected. 6. A sheet body detection device for detecting the presence / absence of sheet bodies laminated on a laminated plate, comprising a moving mechanism for moving a suction plate for sucking the sheet bodies back and forth toward the stacking position. Provided in the vicinity of the suction plate, the suction plate of the suction plate protruding from the suction surface of the sheet body to the sheet body side while maintaining a predetermined distance, and provided so as to be movable back and forth toward the surface of the sheet body, A detection member that moves back and forth integrally with the suction plate under the action of a moving mechanism, and detects the sheet body or the laminated plate by stopping the detection member while contacting the sheet body or the laminated plate. After the position detecting means and the moving mechanism are moved from the initial state for taking out the sheet body by a predetermined distance toward the laminated plate, the position detecting means causes the sheet body to move. Alternatively, the sheet body detecting device, comprising: a control unit that stops the device and displays an abnormality when the laminated plate is not detected. 7. The sheet body detection device according to claim 4, wherein the detection member also serves as a sheet body delivery roller.