JP2759425B2 - Support adjustment mechanism for film cassette tray for X-ray photography in bed - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cassette tray for loading a cassette of X-ray film on the back of a floor of a bed with a predetermined operating force regardless of the inclination angle of the floor. The present invention relates to a mechanism for supporting and supporting a film cassette tray for X-ray photography in a bed which can be easily brought to a desired photographing position.

[0002]

2. Description of the Related Art In recent years, in a bed, a cassette tray for loading a cassette of X-ray photographing film can be mounted on a floor so that a patient can take an X-ray photograph while lying down. Has been commercialized. For example, an I.C. used in an intensive care unit (ICU) for intensively monitoring and treating patients immediately after surgery and severely ill patients. C. U. Beds have become an essential feature. The current I.C. C. U. In a bed, a cassette tray is provided on the floor, that is, on the floor (back bottom) corresponding to the back, and the support position is adjusted by a handle to bring the cassette tray to a photographing location. Although the detailed description of the configuration is omitted, the weight is considerable (about 10K).
g) In order to perform accurate position adjustment, a spring member or the like is used as an auxiliary force.

[0003]

However, in the adjusting means as described above, the operating force required for operating the steering wheel fluctuates depending on the up / down state and the inclined state of the back bottom, and particularly when the inclination angle of the back bottom is large, It is said that the operation is burdensome and difficult to handle. The present invention has been proposed in view of such a background, and has a simpler structure, and allows a film cassette tray for X-ray photography mounted on the back surface of a bed to be easily installed regardless of the inclination angle of the floor. and to provide a desired and to be able to bring the photographing position, Keru Contact <br/> to bed X-ray photographic film cassette tray support adjusting mechanism.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a bed having a function of raising and lowering a floor, and loading a cassette of a film for X-ray photography on the floor. Cassette tray for slidably mounting and supporting position adjustment is possible, and pulleys are provided on the front end side of the floor and near the side attached to the bed frame, while being separated from the floor. A shaft member is rotatably provided on the bed frame at the position where the shaft member is rotatably provided, and pulleys are provided at both ends of the shaft member. One end is connected to the cassette tray end surface on the floor end side, and the floor portion is A pulley on the shaft member of the bed frame, and a linear member wound around the other end side, and attached to the bed frame of the floor section. A spring member having one end connected to a protruding arm protruding from an end surface of the cassette and having the other end wound around a shaft member in a direction opposite to a direction in which the linear member is wound around a pulley; The tray is slid by a slide guide on the floor under the action of tension of the linear member, and is fixedly held at a desired position by locking means provided on the side surface of the cassette tray. .

[0005]

In a bed in which a patient is lying, a cassette of X-ray film is loaded into a cassette tray. At this time, the cassette tray is a linear member wound around the pulley of the shaft member in the bed frame separated from the floor portion via the pulley near the side attached to the bed frame via the pulley on the floor end side. In a state of being pulled by. On the other hand, the shaft member has one end connected to the mounting arm on the floor portion, and the biasing force of a spring member having the other end wound around the shaft member is exerted. The torque generated on the pulley by the linear member is in a balanced state. here,
When the drive source is activated to wake the floor and raise the inclination angle, the cassette tray has a large force to move the slide guide of the floor to the side attached to the bed frame of the floor, and the linear force increases. The torque generated on the pulley of the shaft member is increased by the shape member, and the balance with the torque of the shaft member by the spring member is broken, but the repulsive force of the spring member opposes that force, and the difference in torque applied to the shaft member is reduced. The cassette tray is counteracted and the cassette tray rests when its balance is balanced. Since the moving operation is performed to adjust the position of the cassette tray in that state, the cassette tray can be easily brought to a desired photographing position.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a mechanism for adjusting the support of a film cassette tray for X-ray photography in a bed according to the present invention. FIG. 1 shows a bed 1 which is used in an ICU used in an intensive care unit (ICU). C.
U. It is a bed. That is, this bed 1 has a floor,
That is, the floor corresponding to the back (hereinafter referred to as the back bottom)
It has a back bottom 3 to which an electric starting device 2 for raising and lowering the back is connected, and a cassette tray 4 for loading a cassette of film for X-ray photography on the back bottom 3.
Are slidably mounted on slide guides 5 provided along both side surfaces of the back bottom 3, and a support position can be adjusted by a support adjustment mechanism 6.

The support adjustment mechanism 6 includes pulleys 8 and 9 provided on the tip of the back bottom 3 and near the side attached to the bed frame 7, and a bed frame 7 at a position separated from the back bottom 3. Shaft member 10 provided rotatably
And pulleys 11 provided at both ends of the shaft member 10.
One end is connected to the end face of the cassette tray 4 at the tip of the back bottom 3, and a pulley 9 attached to the bed frame 7 of the back bottom 3 from a pulley 8 at the tip of the back bottom 3.
And a wire 12 wound around the pulley 11 of the shaft member 10 in the bed frame 7 and wound around the other end clockwise in the figure, and an end surface of the back bottom 3 on the side attached to the bed frame 7. The mounting arm 13 protruding from
While connecting one end side, the other end side to the shaft member 10,
In the drawing, a tension spring 14 wound counterclockwise is provided, and the cassette guide 4 is slid under the action of the tension of the wire 12 by moving the slide guide 5 of the back bottom 3 by moving operation means (not shown). The cassette tray 4 is fixedly held at a desired position by a stopper 15 provided on a side surface of the cassette tray 4. The stopper 1
Reference numeral 5 denotes a configuration in which an operating lever 19 is provided via a spring 18 on a base piece 17 protruding from a slide receiving portion 16 on the side surface of the cassette tray 4, and the operating lever 19 is biased by the spring 18. The cassette tray 4 is fixed so that the slide guide 5 is pressed down (see FIG. 2).

The mechanism for supporting and supporting the film cassette tray for X-ray photography in the bed according to the present invention is constructed as described above. Next, this operation will be described.
In the bed 1 in which the patient is lying, a cassette of X-ray photography film is loaded on the cassette tray 4. At this time, the cassette tray 4 passes through a pulley 9 near the side attached to the bed frame 7 via a pulley 8 on the tip side of the back bottom 3, and pulleys of the shaft member 10 in the bed frame 7 separated from the back bottom 3. The wire 12 wound around 11 is held by the slide guide 5 of the back bottom 3 under tension. On the other hand, one end of the shaft member 10 is connected to the mounting arm 13 of the back bottom 3, and the other end of the shaft member 10 is subjected to the biasing force of a tension spring 14 wound around the shaft member 10. Shaft member 1
The torque generated at zero and the torque generated at the pulley 11 by the wire 12 are in a balanced state.

[0009] When the electric starting device 2 for raising the back is activated to raise the back bottom 3, the back bottom 3 is inclined, so that the cassette tray 4 moves along the slide guide 5 of the back bottom 3. However, the force to move to the side attached to the bed frame 7 increases, the torque generated on the pulley 11 of the shaft member 10 by the wire 12 increases, and the balance with the torque of the shaft member 10 by the tension spring 14 is lost. Against this force, the repulsive force of the tension spring 14 is applied to the shaft member 10 so as to cancel out the difference in torque applied to the shaft member 10, and the cassette tray 4 stops when the balance is achieved. Since the operation of the moving operation means is performed to adjust the position of the cassette tray 4 in such a state, the operation force is light and the cassette tray 4 can be easily brought to a desired photographing position.

[0010] As described above, X in the bed or the like according to the present invention.
An example of the support adjustment mechanism of the film cassette tray for radiography has been described with reference to an embodiment. Next, the operating force of the cassette tray 4 was calculated by giving various conditions. Here, the various conditions are, as shown in FIG. 3, "weight of cassette tray 4 ... 10 kg, radius of pulley 11: radius r of shaft member 10 = 5: 1, slide position of cassette tray 4 ... X, slide Possible amount: 500 mm, length L of mounting arm 13 = 150 mm, tension spring 14
Spring constant k = 0.2 kgf / mm, tension spring 14
Natural length X ₀ = 250 mm ”. Under these conditions, the inclination angle θ of the back bottom 3 is 0 °, 30 °, 60 °.
Operating force S of cassette tray 4 in the case of 90 ° and 90 °
I asked for. 1. θ = 0 ° X (mm) 0 250 500 S (kg) 0 2 4 2. θ = 30 ° X (mm) 0 250 500 S (kg) −20 +2 3. θ = 60 ° X (mm) 0 250 500 S (kg) -3.4 -1.4 +0.6 4. θ = 90 ° X (mm) 0 250 500 S (kg) −4 −20 In the operating force S of the cassette tray 4, the head side of the bed is positive. From the above, it can be seen that the operation force S of the cassette tray 4 is 4 kg at the maximum, and the operation is easy. By considering the above conditions,
Further remarkable effects can be expected.

[0011]

As described above, according to the present invention, it is possible to easily move and adjust the cassette tray on the back of the floor of the bed regardless of the up-and-down angle of the floor with a simpler structure to obtain a desired image. A cassette tray can be brought into position.

[0012]

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a main part of a bed provided with a mechanism for supporting and supporting a film cassette tray for radiography according to the present invention.

FIG. 2 is an explanatory cross-sectional view of locking means for holding the cassette tray shown in FIG. 1 on a floor.

3 is an explanatory view of a mechanism for adjusting a support position of a film cassette tray for X-ray photography shown in FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 bed 2 electric starting device for raising back 3 back bottom 4 cassette tray 5 slide guide 6 support adjusting mechanism 7 bed frame 8, 9, 11 pulley 10 shaft member 12 wire 13 mounting arm 14 tension spring

Claims (1)

(57) [Claims] In a bed having a floor undulating function, a cassette tray for loading a cassette of a film for X-ray photography is slidably mounted on the floor and a supporting position is adjusted. A pulley is provided on the front end side of the floor portion and near the side attached to the bed frame, and a shaft member is rotatably provided on the bed frame at a position separated from the floor portion. Pulleys are provided at both ends of the member, and one end is connected to the end face of the cassette tray at the front end of the floor, and the shaft in the bed frame is connected to the pulley at the front end of the floor via the pulley attached to the bed frame of the floor. A linear member wound around a pulley of the member and wound around the other end, and one end is connected to a projecting arm projecting from an end surface of the floor attached to the bed frame, and ~ side A spring member configured to be wound around the shaft member in a direction opposite to the direction in which the linear member is wound around the pulley, such that the cassette tray slides a slide guide on the floor under the action of tension of the linear member. A support adjusting mechanism for a film cassette tray for X-ray photography in a bed , wherein the film cassette tray is fixedly held at a desired position by a locking means provided on a side surface of the cassette tray.