JPS6165230A - Stacking tray for cumulative phosphor sheet - Google Patents

Abstract

PURPOSE:To stack sheets in a tray without positional deviation so that always a prescribed number of sheets can be stacked within the tray by providing a glide layer on the inside wall surface at the bottom end of the tray. CONSTITUTION:The tray 3 for stacking cumulative phosphor sheets is erected diagonally at a prescribed angle by facing upward the aperture surface 3a thereof and is provided with a glide layer 4 on the inside wall surface 3c at the bottom end of the tray 3. A material such as high-density PE or 'Teflon' having a low coefft. of friction is used for the layer 4. Even if the sheet 1 falling to the inside wall surface at the bottom end of the tray 1 by the own weight bounds on the falling surface and deviates positionally in the direction of the surface 3a, the sheet is glided backward to the prescribed position in the direction B by the own weight or is pushed by the own weight of the sheet 1A falling next and is thus glided backward to the prescribed position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a stimulable phosphor sheet in which stimulable phosphor sheets are accumulated one by one inside the stimulable phosphor sheet by transporting the stimulable phosphor sheet using an introduction roller or the like, transporting the sheet horizontally, and dropping the sheet into the own vehicle. Regarding the accumulation tray of the light sheet,
More specifically, the present invention relates to a stacking tray for stimulable phosphor sheets, in which the sheets can be stacked without being displaced within the tray.

(Technical background and prior art of the invention) Certain fluorophores emit radiation (X-rays, alpha rays, beta rays).

When irradiated with γ-rays, ultraviolet rays, etc., part of the energy of this radiation is accumulated in the phosphor, and when the phosphor is then irradiated with excitation light such as visible light, it The phosphor exhibits stimulated luminescence. A phosphor exhibiting such properties is called a stimulable phosphor.

Using this stimulable phosphor, radiation image information of a subject such as a human body is stored and recorded on a sheet of stimulable phosphor, and this sheet is scanned with excitation light to produce stimulated luminescence. A radiation image information recording and reproducing method has been proposed in which the exhaustion light is photoelectrically read to obtain an image signal, and this image signal is processed to obtain a radiation image of a subject that is suitable for diagnosis (for example, Japanese Patent Laid-Open No. 55-12429 No. 56-11395, No. 55-163472, No. 56-11395, No. 55
-116340 etc.). In this method, the final image may be reproduced as a hard copy or
It may also be reproduced on a display device such as RT. In any case, in such a radiation image information recording and reproducing method,
Since the stimulable phosphor sheet does not ultimately record image information, but only temporarily carries image information, the stimulable phosphor sheet may be used repeatedly. It is economical if used repeatedly. Therefore, in order to use the stimulable phosphor sheet repeatedly,
After the image information has been read by scanning with excitation light, the radiation energy remaining on the stimulable phosphor sheet is removed, that is, the afterimage is erased. This afterimage is erased by, for example, irradiating the entire surface of the sheet with light included in the excitation wavelength range of the stimulable phosphor constituting the sheet, heating the sheet, etc. The body sheet is again used to record image information. In such a process, the stimulable phosphor sheet from which the afterimage has been erased is once accumulated on a sheet accumulating tray before being transported to a recording section for recording on the sheet again. The sheet is transferred into the tray by introducing the sheet into the tray that stands obliquely with the opening facing upward using a conveyance mechanism such as an introduction roller provided above the tray.

This situation will be explained with reference to FIG.

As shown in the figure, tray 3 for accumulating stimulable phosphor sheets
stands obliquely at a predetermined angle upward from the frontage surface 3a, and the stimulable phosphor sheet 1 is inserted into the tray 3 through an introduction hole provided near the opening 3a on the outside of the tray 3. The rollers (carrying mechanism) 2A and 2B rotate in the direction of the arrow to be guided inside the tray. The sheet 1 is moved in a direction substantially along the inner wall surface 3b facing the opening 3a in the direction indicated by the arrow a.
After that, the introduction roller 2A,
It leaves 2B and falls due to its own weight by the distance indicated by the arrow. The fallen sheet 1 is placed in the tray 3 so that the sheet surface is parallel to the inner wall surface 3b. In this way, a predetermined number of sheets are stacked one by one in each i-ray.

In the accumulation of stimulable phosphor sheets as described above, in a conventional tray, as shown in FIG. 2, the sheet 1 that falls due to its own weight once comes into contact with a predetermined position on the inner wall surface 3C of the lower end of the tray when it falls. However, due to the impact of the fall due to its own weight, the sheet 1 bounced off the lower end inner wall surface 3C1, and the sheet 1 was stacked diagonally with the lower end of the sheet being shifted in the direction of the arrow 6 toward the opening 3a of the trays 1 to 1 as shown in the figure. , the inner wall surface 3b
A gap is created between the sheet 1 and the sheet 1, so that the sheets that are subsequently stacked are also stacked one after another in a misaligned manner.Since there is insufficient space in the tray 3, the last sheet of the predetermined number of sheets to be stacked is There was a problem that the other sheet could not fit into the tray and would fall out of the tray.

(Object of the Invention) The present invention provides a method for stacking the stimulable phosphor sheets that have been erased as described above for recording purposes. In the accumulation tray for stimulable phosphor sheets, in which the phosphor sheets are accumulated one by one inside the tray parallel to the inner wall surface facing the frontage surface by feeding the phosphor sheets by a carrying mechanism and falling by their own weight, When the stimulable phosphor sheets guided by the mechanism fall due to their own weight, they do not hit the inner wall surface at the lower end and become misaligned, so that a predetermined number of sheets are always aligned parallel to the inner wall surface facing the opening. It is an object of the present invention to provide an accumulation tray of stimulable phosphor sheets with a structure that allows them to be accumulated in sequence.

(Structure of the Invention) A stacking tray of stimulable phosphor sheets according to the present invention is an I!
It is characterized by providing a sliding layer on the inner wall surface of the lower end of the tray, which the lower end of the stacked sheets comes into contact with, for sliding the sheets toward the inner wall surface facing the opening surface of the tray.
Hereinafter, this invention will be referred to as [first invention J]. This sliding layer ensures that when the tray is tilted at a predetermined angle with the opening side facing upward, even if a fallen sheet bounces on the inner wall surface at the lower end of the tray and becomes misaligned, it will still slide back to the predetermined position due to its own weight. This allows the sheet to slide back by being pushed by the weight of the sheet that has fallen next, and high-density polyethylene sheets, Teflon sheets, etc. are used as materials for this.

Further, in another accumulation tray of stimulable phosphor sheets according to the present invention, the above-mentioned slipping layer is provided on the inner wall surface of the lower end of the tray that the lower end of the sheets to be accumulated comes into contact with, and the tray is provided below the opening surface of the tray. The present invention is characterized in that a stopper is provided that extends inward from the edge on the side of the opening surface of one end wall in parallel with the inner wall surface facing the opening surface (hereinafter, this invention will be referred to as the "second invention"). The stopper has a shape and dimension that prevents the sheet from falling and bouncing off the inner wall surface of the lower end of the tray and flying out of the tray, and also allows the sheet to be taken out without damaging the sheet when it is taken out from the tray. It is something.

<Embodiments> Hereinafter, actual IM aspects of the present invention will be described with reference to the drawings.

FIG. 3 is a sectional view showing an embodiment of a stimulable phosphor sheet accumulation tray according to the first invention. As shown in the figure,
The stimulable phosphor sheet accumulation tray 3 stands obliquely at a predetermined angle upward from the opening surface 3a.
A sliding layer 4 is provided on the inner wall surface 3c of the lower end. This sliding layer 4 is made of a material with a low coefficient of friction, such as high-density polyethylene or Teflon. Therefore, even if the sheet 1 that falls onto the inner wall surface of the lower end of the tray 1 due to its own weight bounces on the falling surface and shifts in the direction of the opening surface 3a, it will still slide back to the predetermined position in the direction of arrow B due to its own weight. Next, it is pushed by the falling sheet 1A and slides back to a predetermined position.

Next, a partially enlarged sectional view of another embodiment of the stimulable phosphor sheet accumulation tray according to the first invention is shown in FIG. In this embodiment, the sliding layer 4 is provided on the inner wall surface 3C of the lower end of the tray 3 via a buffer member 4a made of rubber, sponge, or the like. This configuration not only has the effect of sliding the sheet back out of position, but also absorbs the impact of a fall, reducing the spring on the falling surface, and reducing the risk of damaging the bottom edge of the sheet when it falls. You can achieve even greater effects.

FIGS. 5A and 5B are a sectional view and a front view showing an embodiment of the tray according to the second invention. In this embodiment, the above-mentioned first
A sliding layer 4 is provided via a buffer member 4a similar to that in the invention, and the openings are provided downwardly within the opening surface 3a of the tray from both side end walls 3b, 3c of the tray 3 inwardly. A pair of stoppers 5A and 5B are provided that extend parallel to the inner wall surface 3b facing the surface 3a.

These stoppers 5A and 5B are used to prevent the sheet 1 from falling into the tray and flying out of the tray if it bounces off. In particular, the sheets near the end of the predetermined stacked number are slightly thick. It is particularly effective as a means to suppress these sheets because they tend to fly out of the tray even if they bounce.

The stoppers 5A and 5B prevent the sheets from flying out as described above, and their shapes and dimensions are such that when the stacked tray is transported to another device (for example, a recording device), one sheet inside is removed. When the sheet is taken out in a direction substantially perpendicular to the sheet surface using an external member, the sheet can be taken out without being bent or damaged. Further, in the embodiment described above, the stoppers are provided on both end walls of the tray 3, but the stoppers may be rounded on one side or may extend upward from the lower end wall. The actual fit shown roughly in Figures 5A and 58! In this embodiment, the sliding layer 4 is provided via a buffer member 4a, but if a sufficient effect can be achieved without the buffer member 4a, this buffer member may not be provided.

The stimulable phosphor sheet accumulation tray of the present invention described above is used, for example, when accumulating stimulable phosphor sheets discharged from the afterimage erasing section for supply to the recording section. The embodiment is not limited to this.

(Effects of the Invention) As explained above, according to the first invention, by providing a slipping layer on the inner wall surface of the lower end of the tray, sheets that bounce off the falling surface of the tray due to their own weight and become misaligned can be Since the falling sheets are slid back to a predetermined position by their own weight, the sheets are stacked within the tray without shifting, and a predetermined number of sheets can always be stacked within the tray. Further, when the sliding layer is provided through a buffer member, it is possible to absorb the impact of a fall, so that the spring of the sheet is reduced and the lower end of the sheet is not damaged, which is more preferable.

Further, according to the second invention, by providing a sliding layer, it is possible to achieve the same effect as in the above-mentioned first invention, and by providing a stopper, it is possible to prevent the sheets from bouncing or stacking up. It is possible to prevent sheets near the end of the number of sheets from flying out of the tray, and it is possible to always accumulate a predetermined number of sheets in the tray.

Both the first and second inventions described above can achieve great effects with extremely simple mechanisms, and have extremely great practical value.

[Brief explanation of the drawing]

Figures 1 and 2 show the structure of a conventional stimulable phosphor sheet accumulation tray, the state in which the stimulable phosphor sheet is introduced into the tray, and the state in which the stimulable phosphor sheet is accumulated in the tray. FIG. 3 is a cross-sectional view showing the structure of an embodiment of the tray according to the first invention and the state in which the stimulable phosphor sheet is introduced into the tray; FIG. FIG. 5A is a partially enlarged sectional view showing another embodiment of the tray of the first invention; FIG. 5A shows a structure of an embodiment of the tray of the second invention; FIG. 5B is a sectional view showing a state in which the tray is introduced, and FIG. 5B is a front view showing a state in which sheets are accumulated in the tray according to the second invention. 1... Stimulative phosphor sheets 2A, 2B... Introducing roller 3... Toshi-4... Sliding layer 4a...
・Buffer member 5A, 5B... Stopper Figure 1 Figure 2 Figure 3

Claims (6)

[Claims] (1) With the opening surface facing upward, the stimulable phosphor sheet is transported one by one into the interior of the sheet, parallel to the inner wall surface facing the opening surface, by being fed by the carrying mechanism and falling under its own weight. In a stacking tray for stacking stimulable phosphor sheets, a slide is provided on the inner wall surface of the lower end of the tray, which the lower end of the stacked sheets comes into contact with, for sliding the sheet toward the inner wall surface facing the opening surface. An accumulation tray of stimulable phosphor sheets, characterized in that it is provided with a layer. (2) The stacking tray according to claim 1, wherein the sliding layer is provided on the inner wall surface of the lower end of the tray via a buffer member. (3) The accumulation tray according to claim 1 or 2, wherein the accumulation tray is for accumulating stimulable phosphor sheets from which afterimages have been removed for radiographic image recording. tray. (4) With the opening surface facing upward, the stimulable phosphor sheets are transported one by one into the interior of the sheet in parallel with the inner wall surface facing the opening surface, by being fed by the carrying mechanism and falling under their own weight. In a stacking tray for stacking stimulable phosphor sheets, a sliding layer for sliding the sheets toward the inner wall surface is provided on the inner wall surface of the lower end of the tray, which the lower end of the stacked sheets comes into contact with. , further extends below the opening surface from the end edge of the end wall of the tray on the opening surface side inward in parallel with the inner wall surface facing the opening surface, so that the sheet falls under its own weight and falls into the lower end of the tray. A stopper is provided that has a shape and dimension that prevents the sheet from flying out of the tray after contacting a wall surface and allows the sheet to be taken out due to its flexibility when taking out the sheet from the tray. Features a stacking tray of stimulable phosphor sheets. (5) The stacking tray according to claim 4, wherein the sliding layer is provided on the inner wall surface of the lower end of the tray via a buffer member. (6) The accumulation tray according to claim 4 or 5, wherein the accumulation tray is for accumulating stimulable phosphor sheets from which afterimages have been removed for radiographic image recording. tray.