JPS60259244A - Bed apparatus for ct - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an 8V CT bed device on which a subject to be examined is placed on a CT device and moved up/down, left/right, and to the right to match the inspection area. It is.

[Technical Background of the Invention and its Problems] A conventional elevating device for a CT bed device will be described. FIG. 1 shows a schematic side view of a conventional CT bed apparatus.

The lead screw 4 is rotated by a motor 6 via a chain 5, and the lead nut 3 provided on the top support member 2 moves up and down accordingly, and the subject placed on the top 1 moves up and down.

However, this method has a problem in that the top plate 1 cannot be moved lower than the upper end of the lead screw 4, making it difficult for the subject to rest on the top plate 1.

[Object of the Invention] The present invention solves the above-mentioned problems of the conventional CT bed device, and provides a CT bed in which the subject can be easily placed on the top board, and which can smoothly move up and down regardless of the weight of the subject. The purpose of the present invention is to provide a bed device for

[Summary of the Invention] To achieve the above object, the present invention includes a base, a top support frame disposed parallel to the base, and a top support frame supported so as to be movable in parallel on the top support frame. a top plate on which a subject to be examined is placed; a first arm having one end rotatably fixed to the base and the other end movable along a rail attached to the top plate support frame; , assembled with the first arm so as to form an X-shape, one end of which is rotatably fixed to the top plate support frame, and the other end of which is movably installed along a rail provided on the base. a second arm for lifting the top plate; a hydraulic cylinder for applying a driving force to the assembly of the first arm and the second arm to raise the top plate; and a pair of the top plate support frame and the X-shaped arm. or an elastic member having both ends fixed to the top plate support frame and the base, or the X-shaped arm pair and the base, and reinforcing the force for lowering the top plate. This is a CT bed device.

[Embodiments of the invention] An embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a front view and a side view of the elevating device of this embodiment.a A first arm 11 is provided on a base γ with one end movable in rotation with a pin 9b. The other end of the first arm 11 is installed along a rail provided on the top support frame 8 so as to be movable by a roller 12H. Similarly, a second arm 10 whose one end is rotatably mounted on the top plate support frame 8 by means of a pin 9a is attached to the first arm 10.
The arm 11 intersects with the arm 11 in an X-shape, and the other end is installed along a rail provided on the base 7 so as to be rollable by a roller 12b. And these two arms 11.12
are connected to each other so that they can rotate around the intersection. One end of the spring 13 is attached to the top plate support frame, and the other end is placed below the intersection point of the second arm so that the spring 13 biases the top plate support frame 8 and the base 7 closer together as the distance between the top plate support frame 8 and the base 7 increases. They are attached to each.

With this configuration, the arms assembled in an X-shape are pushed at the intersection by a single-acting hydraulic cylinder 14 as shown in FIG. 3, and each roller (128° 12b)
b, 9a), and the top support frame 8 rises.

FIG. 4 is a sectional view of the single-acting hydraulic cylinder. 20
is a ram, 21 is an O-ring, and 22 is an oil-filled space. By supplying oil to this space 22, the ram 20 is pushed out and pushes the X-shaped arm. In this type of hydraulic cylinder, the O-ring 21 tightens the ram 20 with a certain force P to prevent oil leakage. Therefore, when the top plate support frame 8 is lowered, if the diameter of the cylinder 14 is d, and the coefficient of friction between the Q ring 21 and the ram 20 is μ, then the force f・=π・d−p・μ is Ram 2
It is necessary to push in 0. In this example, when descending, a method is adopted in which the subject falls naturally due to the weight of the subject and the weight of the device (top plate, top support frame, subject, etc.), so if the subject is light, the There is a problem that the body weight of the test subject and the weight of the device alone are insufficient for the force f required to push the ram 2o, and the test subject cannot descend, or even if it does descend, the speed is extremely slow. Therefore,
In this embodiment, the spring 13 is designed to reinforce the downward force, and the subject descends smoothly regardless of the weight of the subject.

The present invention is not limited to this embodiment. For example, both ends of the spring 13 may be attached to the top plate support frame 8 and the base 7, or in this embodiment, the springs 13 may be assembled in an X-shape using hydraulic cylinders. Although the force is applied to the intersection (axis) of the arms, the force may be applied elsewhere, for example above the intersection of the first arms 11.

According to this embodiment, when the top plate is lowered, it becomes sufficiently low so that the subject can easily rest on the top plate. Furthermore, even when the subject is not on the top, the top can be smoothly moved up and down. Furthermore, the structure is relatively simple and can be manufactured at low cost.

[Effects of the Invention] According to the present invention, when the CT bed device is lowered, the position of the top plate is lower than that of conventional devices, and the subject can easily lie down on the top plate, and the patient can easily lie down on the top plate. This has the effect of allowing the user to ascend and descend smoothly even when the person weighs light.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a conventional CT bed device, and FIGS. 3 is a schematic side view including the drive device of this embodiment, and FIG. 4 is a sectional view of the hydraulic cylinder used in this embodiment. 7... Base, 8... Top plate support frame, 10...
First arm, 11...Second arm, 13...Spring, 14...Hydraulic cylinder Fig. 1, Fig. 3, Fig. 4, 2 tv z]

Claims (1)

[Claims] a base; a top plate support frame disposed parallel to the base; a top plate on which a subject supported so as to be able to move in parallel is mounted on the top plate support frame; a first arm that is movably fixed and whose other end is movable along a rail provided on the top plate support frame; a second arm rotatably fixed to the top support frame and whose other end is movable along a rail provided on the base; and the first arm for raising the top. a hydraulic cylinder that applies driving force to the assembly of the large plate support frame and the X-shaped silver arm pair, or the top plate support frame and the base, or the X-shaped arm; 1. A CT bed apparatus comprising: a pair of elastic members having both ends fixed to the base and an elastic member for reinforcing the force for lowering the top plate.