JPS61166463A - Accumulative fluorescent-material sheet accommodating magazine - Google Patents

Abstract

PURPOSE:To permit the smooth accommodation by guiding the front edge of an accumulative fluorescent-material sheet inserted into an accommodation box between a bottom surface wall and an elastic roller downwardly urged by a guide member, in a radioactive-ray image recording apparatus. CONSTITUTION:An accumulative fluorescent-material sheet 1a is carried-out at a high-speed from a photographing part, and carried into an accommodation box 20 through an upper-surface opened port 21b. At this time, the front edge of the sheet 1a is guided forwardly and downwardly along an urging guide plate 29, and nipped between an elastic roller 28 and a bottom-surface wall 23 or the preceding sheet 1b, and lightens the speed of the sheet 1a carried-in at a high speed, and the front edge of the sheet is prevented from being damaged. Further, the speed in the collision with the front surface wall 24 and being sprung-back is reduced, and the running-over a rear surface wall 22 and side surface walls 25 and 26 of the sheet 1a is prevented, and the accommodation performance of the sheet is improved, and the formation of scratches due to the rebound can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a radiographic imaging method in which a stimulable phosphor sheet is irradiated with radiation through a subject, and a radiation image of the subject is accumulated and recorded on the stimulable phosphor sheet. The present invention relates to a stimulable phosphor sheet storage magazine used in a recording (imaging) device, and more specifically to a magazine for storing stimulable phosphor sheets after radiographic images have been stored and recorded.

(Technical Background of the Invention and Prior Art) When a certain kind of phosphor is irradiated with radiation (X-rays, α-rays, β-rays, γ-rays, electron beams, ultraviolet rays, etc.), a part of this radiation energy is emitted into fluorescent light. It is known that when this phosphor is accumulated in the body and is irradiated with excitation light such as visible light, the phosphor exhibits stimulated luminescence depending on the accumulated energy, and it is known that this phosphor exhibits this property. -9'1 phosphor is called a storage fluorophore.

Using this stimulable phosphor, radiographic image information of a subject such as a human body can be transferred to a sheet with a layer of stimulable phosphor.
(hereinafter referred to as a "stimulable phosphor sheet" or simply "sheet J"), and this stimulable phosphor sheet is scanned with excitation light such as a laser beam to cause stimulated luminescence. The stimulated luminescence light is read photoelectrically to obtain an image signal, and based on this image signal, a radiographic image is output as a visible image to a recording material such as a photographic light-sensitive material or a display device such as a CRT, which is suitable for diagnosis. Radiographic image information recording and reproducing systems for obtaining radiographic images of objects have been proposed.
5-116340, etc.) Various imaging devices have been proposed in the past for use in the above system and for storing and recording radiation images of a subject on a stimulable phosphor sheet.

For example, in angiography and the like, a so-called high-speed imaging device is used that continuously records the constantly changing appearance of a subject on a plurality of stimulable phosphor sheets. In this high-speed photographing device, the feeding of sheets to the photographing section, the photographing in the shadow section, and the conveyance of the sheets from the photographing section after photographing are performed at a high speed of, for example, about 3 to 4 sheets per second. After photographing, the sheets are carried out from the photographing section at high speed and are stored in a stacked manner in the storage magazine 10 as shown in FIG. 4, but this storage has the following problems.

That is, as shown in FIG. 4, the storage magazine 10 has a rectangular parallelepiped box shape, and a guide surface 1 is provided on a part of the upper surface of the storage magazine 10.
A top wall 11 having a diameter 1a is provided and an opening 12 is defined in the remaining part.

Therefore, the sheet 1a carried out from the photographing section and sent in the direction of arrow A passes through the opening 12 into the storage magazine 10.
stored inside. At this time, it is desirable that the sheets are aligned and overlapped on the bottom surface 113 as shown by 1C, but as the sheet is carried in at a faster speed, the front end of the sheet will be placed on the front wall 113.
4, and the front end of the seat may be damaged. Additionally, when the seat is thrown back due to this collision, the rear end of the seat runs onto the rear wall 15, as shown in 1b, and the side edge of the seat runs onto the side wall, resulting in the seats not being aligned and making storage difficult. There are also problems. Furthermore, there is a fear that the sheet that has been thrown back may rub against the sheet that was stored in front of it, causing damage to this sheet.

(Purpose of the Invention) The present invention has been made in view of the above circumstances, and after radiographic images are accumulated and recorded in the imaging unit, the stimulable phosphor sheets carried out from the imaging unit are arranged in order. The purpose of the present invention is to provide a stimulable phosphor sheet storage magazine that can be stored in a uniform manner, and that can reliably store sheets in alignment even when the sheets are brought in one after another at high speed. It is something to do.

(Structure of the Invention) The stimulable phosphor sheet storage magazine of the present invention is a magazine for storing a stimulable phosphor sheet on which a radiographic image has been accumulated and recorded, a storage box for storing the stimulable phosphor sheets in a stacked manner, the storage box having an opening for carrying the stimulable phosphor sheets into the storage box; and a storage box opposite to the carrying-in side of the stimulable phosphor sheets in the storage box an elastic roller disposed near the side wall so that its axis of rotation is perpendicular to the carrying direction of the stimulable phosphor sheet and parallel to the sheet surface of the stimulable phosphor sheet being carried; a guide member that guides a leading end in the carrying direction of the stimulable phosphor sheet carried into the storage box between the elastic roller and the bottom surface of the storage box; The device is characterized in that it comprises a biasing means for biasing.

(Embodiments) Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing an example of a stimulable phosphor sheet storage magazine according to the present invention, and FIG. 2 is a cross-sectional view of this storage magazine taken along the arrow A-A shown in FIG. However, this embodiment will be explained below with reference to both figures.

The storage magazine according to the present invention has a rectangular parallelepiped storage box 20, and a part of the upper surface of the storage box 20 has a guide for guiding the stimulable phosphor sheet 1 into the storage box 20. A top wall 21 having a portion 21a is provided, and the remaining portion of the top surface is defined with an opening 21b for carrying the stimulable phosphor sheet 1 into the storage box 20, and a side wall on the sheet carrying side. (rear wall) 22, a bottom wall 23, a side wall (front wall) 24 opposite to the sheet loading side, and left and right side walls 25, 26. Inside the storage box 20, a biasing guide plate 29 whose rear end flat portion 29b is fixed to the inner surface of the upper wall 21 by screws 30, 30 is disposed so as to extend forward and downward. At the front end of the biasing guide plate 29, both ends 29a, 29a protrude forward, and an elastic roller 28 whose outer peripheral surface is made of an elastic material such as rubber is rotatably held by the both ends 29a, 29a. Note that at this time, the rotating shaft 28 of the elastic roller 29
a is arranged perpendicular to the carrying direction (six arrow directions) of the stimulable phosphor sheet 1 and parallel to the bottom wall 23. The biasing guide plate 29 is made of a material with high bending elasticity, such as a spring material, and acts as a leaf spring to bias the elastic roller 28 toward the bottom wall 23. Because of its shape extending diagonally downward from the rear end flat portion 29b toward the front end, it serves to guide the front end of the sheet 1a being carried in downward and to make it enter between the elastic roller 28 and the bottom wall 23.

The stimulable phosphor sheet 1a is carried out from the photographing section at high speed into the storage magazine configured as described above, and is carried into the storage box 20 through the opening 21b on the top surface of the storage box 20. At this time, the front end of the sheet 1a is guided downward and forward along the biasing guide plate 29, and is placed between the elastic roller 28 and the bottom wall 23 (or the sheet 1b fed into the hall and placed on the bottom surface). Get into it. Elastic roller 2
By being held between the sheet 1a and the bottom wall 23 (or the sheet 1b), the force of the sheet 1a brought in at high speed can be reduced, so the collision speed between the tip of the sheet 1a and the front wall 24 can be reduced. By lowering the seat 1, it is possible to prevent damage to the front end of the seat, and also to reduce the speed at which the seat 1 bounces off the front wall 24, thereby preventing the seat 1 from riding on the rear wall 22, side walls 25, 26, etc. Although it has been explained that the light sheet 1 is carried out at high speed,
This is particularly effective when photographing is carried out at high speed and sheets are carried into the storage magazine at high speed, so the explanation is given for the case of high-speed carrying out, and is not limited to only high-speed cases. That is, even when the speed is relatively low, the urging force of the urging guide plate 29 on the elastic roller 28 can be appropriately set in accordance with the unloading speed.

FIG. 3 is a sectional view showing another embodiment of the storage magazine according to the present invention. The storage magazine in FIG. 3 also has the same storage box 20 as in the embodiment described above, but inside this storage box 20, the rear @ 131b is rotatably supported on the inner surface of the top wall 21 of the storage box 20. A guide plate 31 is arranged to extend obliquely downward toward the front. Guide plate 3
The front end 31a of the roller 1 rotatably supports the elastic roller 528, and also supports the elastic roller 28 so that its rotational axis is perpendicular to the carrying direction and parallel to the bottom wall 23. This guide plate 31, unlike the biasing guide plate 29 used in the storage magazine shown in FIGS. 1 and 2, does not need to be an elastic body and may be a plate made of a rigid material. Instead, a compression spring 32 is attached to the front end 31a of the guide plate 31, and the compression spring 32 biases the front end 31a downward, and the elastic roller 28 is also biased downward by this biasing force.

For this reason, also in the case of the storage magazine shown in this figure, the front end of the stimulable phosphor sheet 1 being carried in is guided along the guide plate 31, and the front end of the sheet is moved between the elastic roller 28 and the bottom wall 23.
(or other sheets already stored) to prevent the sheet from bouncing back.

In the example shown in FIG. 3, a shock absorbing plate 33 is provided on the inner surface of the front wall 24, and this shock absorbing plate 33 provides a 1!
To more effectively prevent the rebound of a sheet by softening the impact of a liar, and to suppress damage to the tip of the sheet.

It is a matter of theory that this buffer plate 33 may be used in the case of the storage magazine shown in FIGS. 1 and 2.

(Effects of the Invention) As described above, according to the present invention, the elastic roller disposed near the side wall of the storage box on the opposite side to the sheet import side is biased toward the bottom wall, and the sheet is transported into the box. Since the front end of the sheet is guided by the guide member between the elastic roller and the bottom wall, especially when the sheet is transported into the storage box at relatively high speed, the front end of the sheet being transported is guided between the elastic roller and the bottom wall. The sheet is sandwiched between the elastic roller and the bottom wall or the sheet that has already been carried in to slow down the force of the sheet being carried in, thereby preventing damage to the front edge of the sheet, and also preventing the sheet from bouncing onto the sides of the storage box, etc. can improve storage capacity. Furthermore, since it is possible to suppress the sheet from bouncing back, it is less likely that the sheet surface of the sheet that has already been carried in will be damaged by the bouncing sheet.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the storage magazine according to the present invention, Fig. 2 is a sectional view taken along the arrow A-A in Fig. 1, and Fig. 3 is a sectional view of a storage magazine according to the present invention. 4 is a sectional view showing an example of a conventional storage magazine. 1... Fluorescent sheet 10... Storage magazine 2
0...Storage box 21...Top wall 23...
Bottom wall 28...Elastic roller 29...Biasing guide plate 31...Guide plate 33...Buffer plate Fig. 1 Fig. 3

Claims (1)

[Scope of Claims] A magazine for storing a stimulable phosphor sheet on which a radiation image has been stored and recorded, the magazine having an opening for carrying the stimulable phosphor sheet into the magazine. a storage box for storing the stimulable phosphor sheets in a stacked manner; an elastic roller disposed perpendicular to the carrying direction of the stimulable phosphor sheet and parallel to the sheet surface of the stimulable phosphor sheet being carried in; and the stimulable phosphor sheet being carried into the storage box. a guide member that guides the leading end of the body sheet in the carrying direction between the elastic roller and the bottom surface of the storage box; and a biasing means that biases the elastic roller toward the bottom surface of the storage box. Features a stimulable phosphor sheet storage magazine.