JPH0270633A - Taking out method for sheet-like object - Google Patents

Abstract

PURPOSE:To surely project a sheet-like object from a slit by keeping high pressing force until the sheet-like object projects from the slit, and keeping low pressing force after projection up to completion of taking-out of the sheet-like object. CONSTITUTION:A reflection type photo sensor 23 as a detecting means to detect the extreme end of an accumulative fluorescent material sheet 2a projected from a slit 1a is provided in proximity to the slit 1a, and sends a detected signal to a control unit 20 when it detects the extreme end of the accumulative fluorescent material sheet. According to input of the detected signal to the control unit 20, the setting value of the pressing force in a pressing means 10 is deceased, and a control signal due to the decreased setting value is sent to a pressure controller 21. The pressure controller 21 received the control signal lets a motor 15 rotate so as to move a moving plate 13 a little upward. By upward movement of the moving plate 13, the energized force due to a spring 17 is reduced, and the pressing force to the accumulative fluorescent material sheet is reduced. As the result, the sheet can be smoothly taken out.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a method for taking out sheet-like objects such as stimulable phosphor sheets one by one from a housing such as a magazine. The present invention relates to a method for taking out a sheet-like object by which the sheet-like object can be taken out reliably without damaging the surface of the object.

(Prior Art) Various magazines and the like have been known as casings in which a plurality of sheet-like objects are vertically stacked and stored. In addition to photographic film, these magazines have been published by the applicant in Japanese Patent Application Laid-Open No. 55-12429.

A stimulable phosphor sheet used in the radiation image information recording and reproducing system proposed in 5B-11195 and the like is stored.

The sheets stored in the magazine are taken out from the magazine and used for various purposes, but sheet-like objects are taken out from the magazine in order from the top to the bottom, and sometimes from the bottom to the bottom. It may be done in order. Among these, the magazine from which sheets are taken out from the lowest one has a slit in the side wall that opens to the side of the lowest sheet among the multiple stored sheets, so that it can be operated from the outside. The sheet push-out pawl slides in the lateral direction to push out the lowest sheet-like object from the slit, and the lowest sheet-like object is taken out through the slit.

(Problem to be Solved by the Invention) However, the slit in the above-mentioned magazine is formed at a height approximately equal to the thickness of one sheet-like object to prevent two or more sheet-like objects from being accidentally pushed out. Therefore, if the sheet-like object is even slightly curved, the sheet-like object may get caught in the slit, making it impossible to take out the sheet-like object. In particular, when the sheet-like object is the above-mentioned stimulable phosphor sheet, the stimulable phosphor sheet is conveyed along a curved surface or stopped on a curved surface to read image information, etc. Because of this, the sheet tends to be curved.

In order to correct the above-mentioned curvature and reliably take out the sheet-like objects from the magazine, the sheet-like objects stacked in the magazine are pressed from above to forcibly flatten the sheet-like objects. It is conceivable that the stimulable phosphor sheet be taken out using the sheet push-out claw in this state. However, if you press the sheet while removing it, a large amount of force is required to pull out the sheet, which may result in failure to pull it out, or the friction during pulling out may damage the surface of the sheet. This causes the inconvenience of being attached.

The present invention has been made in view of the above-mentioned problems, and provides a sheet-like object retrieval method that can reliably and safely take out a sheet-like object from a magazine using the above-mentioned sheet extrusion claw and slit. The purpose is to provide the following.

(Means for Solving the Problems) In the method for taking out a sheet-like object of the present invention, a pressing force is continuously applied to the sheet-like object in a housing from above by a pressing means, and the sheet-like object is pushed out by a sheet extrusion claw to remove the sheet-like object from the housing. After the tip of the lowest sheet-like material among the sheet-like materials inside the body protrudes from the slit of the housing, the suppressing means is controlled until the entire lowest sheet-like material is pushed out of the housing. This is characterized by weakening the pressing force exerted by the pressing means.

In addition, in order to weaken the pressing force by the pressing means after the sheet-like object has protruded from the slit, it is possible to directly detect that the sheet-like object has protruded from the slit and weaken it, or to weaken it by directly detecting that the sheet-like object has protruded from the slit. By detecting the protrusion of the sheet-like object from the slit, it may be indirectly detected and weakened.

(Function) According to this method, the sheet-like material of the casing is kept flat by being pressed by the pressing means, so that the tip of the lowest sheet-like material is pushed by the sheet push-out claw and is securely pressed. can pass through the slit. Furthermore, once the tip of the lowest sheet-like object has passed through the slit, it is easily carried out from the slit, so there is no problem in carrying it out even if the pressing force by the pressing means is weakened as described above. On the contrary, since the force of the sheet pushing means for pushing the sheet-like object can be reduced, the sheet-like object can be taken out reliably. At the same time, if the pressing force is weakened as described above, there is no risk that the sheet-like objects will be damaged by friction when taking them out.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view showing a mechanism by which a stimulable phosphor sheet is taken out from a magazine according to the method of the present invention, and FIG. 2 is a side view of the magazine.

Inside the magazine 1, a plurality of stimulable phosphor sheets 2 are stacked vertically and stored, and on the side wall IA of the magazine 1, the lowest stimulable phosphor sheet among the stored stimulable phosphor sheets is stored. A slit 1a is provided for taking out the body sheet 2a laterally. The slit la extends over the width of the stimulable phosphor sheet 2, and is formed to have a slightly larger height depending on the thickness of one stimulable phosphor sheet.

Further, above the stimulable phosphor sheet 2 in the magazine 1, a pressing means 10 for pressing the entire surface of the stimulable phosphor sheet 2 downward is provided. This pressing means 10 is
Pressing plate 11 in direct contact with the uppermost stimulable phosphor sheet
．． A pair of support shafts 12 are implanted in the pressing plate 11, the support shafts are passed through, and the movable plate 13 is supported by a support means (not shown) so as to be movable up and down by an external force, while being guided by a guide plate 14. A screw rod 1B whose tip abuts against the moving plate 13, a motor 15 which rotates the screw rod in both forward and reverse directions, and a screw rod 1B mounted on the circumferential surface of the support shaft 12 between the pressing plate 11 and the moving plate 13, It consists of a spring 17 that urges the plate 11 downward and the movable plate 13 upward. The pressing means lO is a motor 1
The movable plate 13 is moved up and down by the screw rod 1B which is rotated by the drive of 5, and the pressing force is adjusted by changing the distance from the pressing plate 11. A pressure sensor 18 is provided to detect the pressing force. The signal emitted from the pressure sensor 18 is sent to the control unit 20, the control unit 20 issues a control signal according to the input signal to the pressure controller 2I, and the pressure controller 2I rotates the motor 15 based on the control signal. By making the stimulable phosphor sheet 2
The movable plate 13 is moved up and down so that it is pressed with a predetermined pressing force.

The pressure sensor 18, fli control unit 20,
Control is performed by the pressure controller 21, and as the stimulable phosphor sheets are taken out one by one, the pressure plate 1
1 is lowered and the distance between the pressing plate 11 and the movable plate 13 increases and the pressing force decreases, the motor 15 is rotated as described above based on the signal emitted from the pressure sensor 18, and the amount by which the suppressing plate 11 is lowered is increased. The moving plate 13 is lowered by the same amount. If a pressing force is constantly applied to the stimulable phosphor sheet 2 from above in this way, even the stimulable phosphor sheet that is bent due to bending and conveyance outside the magazine can be held in a flat state inside the magazine. be done.

On the other hand, two sheet push-out claws 22 are provided at the bottom of the magazine 1, for example. The sheet pushing claw 22 is
Groove 1 provided at the bottom of the magazine can be operated from the outside.
b in the direction of arrow A to push out the lowest stimulable phosphor sheet from the slit la to the outside of the magazine. The stimulable phosphor sheet 2 is further pulled out while being nipped by nip rollers 24 disposed adjacent to the slit la, and transported to the next process. When the tip of the stimulable phosphor sheet 2a is clamped by the nip roller 24, the sheet push-out claw 22 is moved in the direction of arrow B by an external operation and returned to the initial position in contact with the right edge of the stimulable phosphor sheet 2. .

By the way, while the stimulable phosphor sheet is being moved out of the magazine by the sheet push-out claw 22 and the nip roller 24, the entire stimulable phosphor sheet 2 inside the magazine is being strongly pressed by the above-mentioned pressing means IO. In addition, a large force is required to take out the stimulable phosphor sheet, making it difficult to take it out properly, and there is a risk that the surface of the stimulable phosphor sheet may be damaged due to friction between the stimulable phosphor sheets. Therefore, in the method of this embodiment, after the tip of the lowest stimulable phosphor sheet 2a protrudes from the slit 1a, the pressing force is weakened until the conveyance of the sheet is completed.

That is, a reflective photosensor 23 is provided near the slit la as a detection means for detecting the tip of the stimulable phosphor sheet 2a protruding from the slit. When detected, a detection signal is sent to the control section 20. When the detection signal is input, the control unit 20 decreases the set value of the pressing force of the pressing means IO, and sends a control signal to the pressure controller 2L based on the reduced set value.

The pressure controller 21 to which the control signal was sent is the motor 15
is rotated to move the moving plate 13 slightly upward.

When the movable plate 13 moves upward, the biasing force exerted by the spring 17 is weakened, and the pressing force against the stimulable phosphor sheet 2 is reduced. Since the pressing force is concentrated after the tip of the lowest stimulable phosphor sheet passes through the slit la, there is no problem in taking out the stimulable phosphor sheet, and in this way, the pressing force can be weakened during taking out. If the stimulable phosphor sheet 2a is kept in place, the force required to move the stimulable phosphor sheet 2a will be small, ensuring reliable removal and eliminating the risk of damaging the stimulable phosphor sheet. The photosensor 23 is a stimulable phosphor sheet 2a.
When the rear end portion finishes passing above, a detection signal is again issued to the control unit, and the control unit 20 increases the pressing force of the pressing means to the normal level via the pressure controller 21.

Next, another embodiment of the present invention will be described with reference to FIGS. 3 and 4. Note that the same parts as in the embodiment described above are given the same numbers, and the explanation thereof will be omitted.

In the embodiment shown in FIG. 3, the movement of the movable plate 13 for adjusting the pressing force against the stimulable phosphor sheet 2 is performed by a pair of ferromagnetic bodies 2B attached to the lower surface of the movable plate 13 and these ferromagnetic bodies 2B. This is done by an electromagnet 19 placed below the magnetic body. That is, a control signal issued from the control unit 20 based on the output of the pressure sensor 18 is sent to a 7IS flow controller 25 that controls the value of the current flowing through the electromagnet 19. The higher the current value 25 flowing through the electromagnet 19, the more the ferromagnetic material 2B is attracted to the electromagnet 19.
As the number of stimulable phosphor sheets decreases and the pressing plate 11 is lowered, the current value is increased and the moving plate 13 is lowered to maintain a constant pressing force regardless of the number of stimulable phosphor sheets. It can be added to the phosphor sheet 2. Furthermore, when taking out the lowest stimulable phosphor sheet 2a, if the above-mentioned current values corresponding to the number of stimulable phosphor sheets are slightly decreased, the movable plate 13 is moved upward and the stimulable phosphor sheet 2a is removed. The pressing force against the body sheet can be weakened. Note that the electromagnet 19 may be movable integrally with the suppression plate 11, and in this case, there is no need to change the current value depending on the number of stimulable phosphor sheets in the magazine.

In the embodiment shown in FIG. 4, the wedge-shaped member 3
3 in the horizontal direction, the moving plate 13' is moved up and down to adjust the pressing force against the stimulable phosphor sheet. That is, the wedge-shaped members 33 are provided on both sides of the magazine 1, and are fixed to the tips of screw rods 31 that are guided by a guide plate 32 and rotated in both forward and reverse directions by a motor 34. It can be moved horizontally. In this embodiment, the pressure controller 21' controls the motor 34, and the two motors 34 move the wedge-shaped member 33 inward or outward by the same amount under the control of the pressure controller 21'. move it.

The movable plate 13' has a weight so large that it will not be pushed upward by the biasing force of the spring 17, and is always supported at both ends by wedge-shaped members 33. Therefore, if the wedge-shaped member 33 moves inward, the movable plate 1
The position of the moving plate 13' is raised, and as the wedge-shaped member 33 moves outward, the position of the moving plate 13' is lowered. As the number of stimulable phosphor sheets 2 in the magazine decreases and the pressing plate 11 descends, a wedge is created based on the signal emitted from the pressure sensor 18 so that the pressing force against the stimulable phosphor sheets is always equal. The shaped member 33 gradually retreats outwards and lowers the moving plate 13'. Furthermore, when taking out the lowest stimulable phosphor sheet 2a, the positions of the wedge-shaped members, which are determined according to the number of stimulable phosphor sheets in the magazine, are moved inward little by little.
By moving the moving plate 13' upward, the pressing force against the stimulable phosphor sheet can be weakened.

Note that the specific configuration of the pressing means used in the method of the present invention is not limited to that shown in each of the above-mentioned embodiments, and is capable of pressing the entire stimulable phosphor sheet, and also has a pressing force Any configuration may be used as long as it is possible to adjust. In addition, means for detecting that the tip of the lowest stimulable phosphor sheet has protruded out of the magazine include a means for directly detecting the tip of the stimulable phosphor sheet such as the above-mentioned photosensor, and a means for detecting the tip of the stimulable phosphor sheet at the position of the sheet push-out claw. The tip position of the stimulable phosphor sheet may be indirectly detected by detecting the stimulable phosphor sheet. Further, in accordance with the number of stimulable phosphor sheets, etc., a control value is determined in advance in the control unit so that the pressing means can be controlled to a predetermined pressing force when the stimulable phosphor sheet is taken out and when the stimulable phosphor sheet is not taken out. In some cases, the pressure sensor can be omitted. It goes without saying that the method of the present invention can be used not only for taking out stimulable phosphor sheets but also for taking out various other sheet-like materials.

(Effects of the Invention) As explained above, according to the method for taking out a sheet-like object of the present invention, the pressing force is increased until the sheet-like object protrudes from the slit, and the pressing force is increased until the sheet-like object is completely taken out after ejection. Since the pressing force is weakened, the sheet-like object can be reliably projected from the slit, and the sheet-like object can then be taken out reliably without damaging the sheet-like object.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a mechanism for taking out a stimulable phosphor sheet from a magazine according to an embodiment of the present invention, FIG. 2 is a side view of the magazine, and FIGS. 3 and 4 are other embodiments of the present invention. FIG. 2 is a schematic diagram showing a mechanism for taking out a stimulable phosphor sheet from a magazine according to an example method. 1... Magazine 1a... Slit 2.
...Stormable phosphor sheet 2a...Lowest stimulable phosphor sheet 10...Press means 11...Press plate 12...Spindle
13...Moving plate 15...Motor 16...Screw rod 17...Spring 18.
...Pressure sensor 20...Control unit 21...
Pressure controller 22... Sheet extrusion claw 23...
・Photo sensor

Claims (1)

[Scope of Claims] From a casing that stores sheet-like materials stacked in the vertical direction, and has a slit in the side wall that opens to the side of the lowest sheet-like material among the stored sheet-like materials. , in the method for taking out the sheet-like object, in which the sheet-like object is taken out one by one by a sheet extrusion claw that slides in the lateral direction by an external operation and pushes out the lowest sheet-like object from the slit; A pressing force is continuously applied from above to the sheet-like object by the pressing means, and after the tip of the sheet-like object at the lowest position protrudes from the slit by being pushed out by the sheet extruding claw, the sheet-like object at the lowest position is A method for taking out a sheet-like object, characterized in that the pressing force by the pressing means is weakened by controlling the pressing means until the entire object is pushed out of the housing.