JPH08140963A - Sleeper device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a bed device that reduces the load on the top plate during photographing. [Structure] The link members 11 and 12 are installed in a diagonally parallel state between the base 1 and the top plate support frame 2, and one end portion 11a,
12a is rotatably attached to the top plate support frame 2, and the other ends 11b, 1
2b is connected to the base 1 so as to be rotatable and horizontally movable,
The auxiliary link member 13 has a fulcrum 13a that is rotatably connected to the midpoint of the first link member 11 and a fulcrum 13b that is rotatably and horizontally movable to the base 1. It can move horizontally, and ends 11b, 1 of the link members 11, 12
The jack 14 connected to 2b and biased to the left by the compression coil spring 16 moves the fulcrum 13b horizontally by expanding and contracting the screw shaft 14a, and the leftward movement of the fulcrum 13b is restricted by the first stopper 15, The leftward movement of the end 12b of the member 12 is restricted by the second stopper 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in an X-ray CT apparatus, a magnetic resonance tomography apparatus (MRI apparatus), a positron emission tomography apparatus (PET apparatus), and the like, and is a top plate for mounting a subject. The present invention relates to a bed device having a function of moving the table up and down with respect to a base (floor surface) and horizontally moving the tabletop with respect to a tabletop support frame (base).

[0002]

2. Description of the Related Art A conventional bed apparatus of this type, as shown in FIG. 26, includes a base 1 installed on a floor and a top plate support frame 2.
And a base 3 including a lift drive mechanism (not shown) for raising and lowering the top plate support frame 2 with respect to the base 1, and a base 3 for mounting the subject M supported on the top plate support frame 2 so as to be horizontally movable. The top plate 4 and a horizontal drive mechanism (not shown) for horizontally moving the top plate 4 with respect to the top plate support frame 2 are configured.

A conventional lifting drive mechanism uses a top plate support frame 2 as a base 1 by means of a four-bar parallel link mechanism, an X-type link mechanism, and an actuator for driving the link mechanism.
It is configured to move up and down in a direction perpendicular to the (floor surface). In addition, the horizontal drive mechanism horizontally moves the top plate 4 with respect to the top plate support frame 2 (base 3) by a mechanism that converts the rotation of the motor into a linear motion, and supports the top plate 4. It is configured to be supported by the frame 2 in a cantilever manner and to move the subject M placed on the top plate 4 in the horizontal direction.

For example, an X-ray C
When used in a T device, as shown in FIG. 27, the base 3
Is arranged near an opening 5a of a gantry 5 (in which an X-ray tube (not shown) and an X-ray detector are opposed to each other and are rotatably provided inside). Then, first, the top plate 4 on which the subject M is placed
Is moved vertically to the floor surface to adjust the height of the subject M, and then the top plate 4 is horizontally moved to insert the subject M into the opening 5a of the gantry 5, An X-ray tomographic image is captured by locating the imaging region of the specimen M at the imaging position SP of the gantry 5 (the position where the X-ray tube and the X-ray detector are circulated).

[0005]

However, the prior art having such a structure has the following problems. That is, in the imaging of the X-ray tomographic image using the bed apparatus of the conventional example, as shown in FIG. 28, the first imaging region (the tip of the head) of the subject M in which the height of the subject M is adjusted. ) Is separated from the photographing position SP of the gantry 5 by L. Therefore, according to the conventional device, for example, the imaging region SB
In order to photograph 1, the top plate 4 needs to be horizontally moved by (L1 involved in photographing) + (L not involved in photographing). By the way, when the top board 4 is moved horizontally,
Is supported by the top plate support frame 2 in a cantilever manner, the longer the horizontal movement distance of the top plate 4 (the length over which the top plate 4 extends from the top plate support frame 2) becomes, the greater the load on the top plate 4 will be. Become. Under such circumstances, unlike the conventional apparatus, in a configuration in which useless horizontal movement (horizontal movement of L) that is not involved in photographing is performed, the use of the amount of useless horizontal movement of the tabletop 4 is also taken into consideration. 4 and the support strength of the top plate 4 to the top plate support frame 2 need to be increased. In addition, in some cases, there are inconveniences such as being unable to perform imaging up to the vicinity of the foot and imposing restrictions on the imaging area.

Such an inconvenience may occur not only in the case of the X-ray CT apparatus but also in the case of using the bed apparatus having the conventional structure for the MRI apparatus or the PET apparatus, for example.

Further, in particular, as shown in FIG. 29, an X having a so-called tilt photographing mechanism for inclining the gantry 5 is provided.
In the case of the line CT apparatus, when the base 1 (base 3) is brought close to the gantry 5 as shown by the dotted line in FIG. 29, the gantry 5 tilted in the direction of the bed apparatus interferes with the base 3 of the bed apparatus. Will end up. Therefore, in order to avoid such interference, the base 3 must be installed at a certain distance from the gantry 5, and in such a case, the above-mentioned useless horizontal movement distance L becomes further longer, and therefore, the time of photographing is reduced. The load applied to the top plate 4 tends to be higher.

That is, according to the conventional apparatus, firstly, it is difficult to shorten the useless horizontal movement (L) that is not involved in photographing, and therefore, it is difficult to reduce the load applied to the top plate at the time of photographing. There is a problem that it is difficult to take a wide area.

Further, an X-ray fluoroscope having an X-ray tube and an imaging system (composed of an image intensifier, a TV camera, etc.) supported by a C-shaped arm is disposed between the gantry and the bed of the X-ray CT apparatus. Then, the X-ray tomographic image may be taken by a procedure in which the diffusion of the contrast agent administered to the subject is confirmed by the X-ray fluoroscopic apparatus and then the X-ray tomographic image is taken with the gantry. This X-ray fluoroscope is movable and is placed between the gantry and the bed apparatus when observing the diffusion state of the contrast agent, while it is placed between the gantry and the bed apparatus when the X-ray tomographic image is taken by the gantry. Moved away from.

In this case, a space for disposing the X-ray fluoroscope between the gantry and the bed apparatus must be secured in advance and the base of the bed apparatus must be installed on the floor surface, and the distance between the gantry and the base is wide. Therefore, the same problem as described above occurs when the X-ray tomographic image is captured by the gantry.
On the other hand, when observing the diffusion state of the contrast agent with the X-ray fluoroscope, even if the top plate (top support frame) is vertically moved up and down as in the conventional device, the load on the top plate, the limitation of the imaging area, etc. Is not a big problem. However, for example, if the bed apparatus is configured so that the X-ray tomographic image can be suitably captured by the gantry, the diffusion state of the contrast agent cannot be suitably observed by the X-ray fluoroscope. That is, in the case where the bed apparatus is used so that the subject is suitably placed and transferred to each of the two types of diagnostic apparatuses, the conventional apparatus cannot suitably perform the processing by each diagnostic apparatus, and Conventionally, the bed apparatus having such a structure does not exist.

The present invention has been made in view of the above circumstances, and its first object is to reduce the load on the tabletop at the time of photographing and to widen the photographing area. To provide.

A second object of the present invention is to provide a bed apparatus capable of suitably placing and transferring a subject to each of two types of diagnostic apparatuses.

[0013]

The present invention has the following configuration to achieve the above object. That is, the invention according to claim 1 is a base installed on the floor surface, a top plate support frame arranged above the base, and a lift drive mechanism for moving the top plate support frame up and down with respect to the base. A base, a top plate for placing a subject horizontally supported on the top plate support frame, and a horizontal drive mechanism for horizontally moving the top plate with respect to the top plate support frame. In a bed apparatus provided with the elevator drive mechanism, (a) is obliquely installed between the base and the top plate support frame, and one end thereof is rotatably connected to the top plate support frame. (B) An elevator link member whose end is horizontally movably connected to the base, and (b) is installed in a state where the elevator link member intersects the elevator link member and supports the elevator link member from below, and is rotatable to the elevator link member. The fulcrum connected to the An auxiliary link member having a fulcrum connected to the base, (c) an actuator that is horizontally movable with respect to the base and horizontally moves a base-side fulcrum of the auxiliary link member, and (d) the auxiliary link. A first stopper that restricts the movement of the base-side fulcrum of the member when it is horizontally moved by a predetermined distance toward the base-side end of the lifting link member; and (e) a base-side fulcrum of the auxiliary link member. Urging means for urging the actuator in the direction of horizontal movement of the actuator toward the first stopper, (f)
A connecting member for connecting the base end of the elevating link member to the actuator; and (g) a base end of the elevating link member in a direction opposite to the fulcrum of the auxiliary link member on the base side. It is configured by a mechanism including a second stopper that regulates horizontal movement.

In the invention according to claim 2, the base installed on the floor, the top plate supporting frame arranged above the base, and the top plate supporting frame being moved up and down with respect to the base. A base consisting of an up-and-down drive mechanism, a top plate for placing a subject horizontally supported on the top plate support frame, and a horizontal drive for horizontally moving the top plate with respect to the top plate support frame. In a bed apparatus including a mechanism, the elevating drive mechanism is (a) obliquely installed between the base and the top plate support frame, and one end thereof is rotatably connected to the top plate support frame. And (b) the elevator link member whose other end is horizontally movably connected to the base and is crossed with the elevator link member to support the elevator link member from below. A fulcrum connected rotatably and water on the base. An auxiliary link member having a fulcrum connected movably, and (c) a drive means connected to the base-side end of the elevating link member and the base-side fulcrum of the auxiliary link member to bring them into contact with and separate from each other. And (d) for restricting horizontal movement of the base side fulcrum of the auxiliary link member in a state where the base side end of the elevating link member and the base side fulcrum of the auxiliary link member are farthest apart. The first restricting means, and (e) the base end of the lifting link member is horizontally separated from the base side fulcrum of the auxiliary link member, and the base end of the lifting link member is horizontal. Second restricting means for restricting movement, (f)
A state in which the horizontal movement of the base-side fulcrum of the auxiliary link member is restricted by the first restricting means before the ascending operation is started, and a base-side end portion of the elevating link member by the second restricting means. Is constituted by a mechanism including a regulation switching means for switching to either one of the state in which the horizontal movement of the above is regulated and the state in which the horizontal movement is regulated.

[0015]

The operation of the invention described in claim 1 is as follows. In the state where the top plate is lowered, that is, in the state where the base and the top plate support frame are closest to each other, the end portion on the base side of the lifting link member and the fulcrum on the base side of the auxiliary link member that intersects the lifting link member. Is farthest away. At this time, the end of the lifting link member on the base side is restricted in horizontal movement by the second stopper, and the actuator connected to the end of the lifting link member on the base side is also connected to the base side of the lifting link member. Horizontal movement in the same direction as the end of the is restricted.

In this state, when the actuator horizontally moves the fulcrum of the auxiliary link member on the base side toward the end of the elevating link member on the base side, the auxiliary link member moves along with the movement of the fulcrum of the auxiliary link member on the base side. The fulcrum on the side of the lifting link member acts so as to push out the lifting link member in a direction intersecting the installation direction of the lifting link member. At this time, the actuator is fixed on the base by the urging by the urging means and the regulation by the second stopper,
The base-side end of the lifting link member connected to the actuator by the connecting member is also fixed. Therefore, due to the acting force of the above-mentioned auxiliary link member on the lifting link member, the ceiling of the lifting link member is centered around the base-side end of the fixed lifting link member, and along the arc with the lifting link member as the radius. The end portion on the plate support frame side moves upward, whereby the top plate support frame is lifted in an oblique direction (a combined direction of the vertical direction and the horizontal direction) with respect to the base.

Then, when the actuator is further driven, the fulcrum of the auxiliary link member on the base side is restricted in its movement by the first stopper. After that, the actuator is horizontally moved by the driving force in a direction opposite to the horizontal movement direction of the fulcrum on the base side of the auxiliary link member toward the first stopper side while repelling the urging force of the urging means. Therefore, the base-side end of the lifting link member connected to the actuator is in the same direction as the horizontal movement direction of the actuator (direction toward the base-side end of the auxiliary link member and away from the second stopper).
Is moved horizontally. As a result, the elevating link member is displaced from the oblique state to the upright state, and the top plate support frame is further raised. At this time, since the horizontal movement of the fulcrum of the auxiliary link member on the base side is restricted by the first stopper, the fulcrum of the auxiliary link member on the elevating link member side is the same as that of the elevating link member as described above. Do not give action.

That is, in the elevator drive mechanism of the present invention, first, the top plate support frame is raised in an oblique direction (the direction in which the vertical direction and the horizontal direction are combined), and then the top plate support frame is further raised. A two-step ascending operation is performed.

The lowering operation of the top plate is the reverse of the above operation. First, when the actuator is driven in the opposite direction to that when the top plate is raised, the actuator is driven by the repulsive force of the biasing means. Is horizontally moved in the direction in which the urging means is urged, and the base-side end of the lifting link member is horizontally moved in a direction away from the base-side fulcrum of the auxiliary link member,
Since the base side end of the auxiliary link member is fixed, the top plate descends. When the horizontal movement of the base-side end of the lifting link member and the actuator is restricted by the second stopper, the base-side fulcrum of the auxiliary link member separates from the base-side end of the lifting link member. Since the actuator and the lifting link member are fixed at their base-side ends, the top plate descends diagonally.

The operation of the invention described in claim 2 is as follows. In the state where the top plate is lowered, that is, in the state where the base and the top plate support frame are closest to each other, the end portion on the base side of the lifting link member and the fulcrum on the base side of the auxiliary link member that intersects the lifting link member. Are most distantly connected to the drive means. At this time, since the horizontal movement of at least one of the base end of the lifting link member and the fulcrum of the auxiliary link member on the base side is restricted, the base end of the lifting link member and the auxiliary link member The fulcrum on the base side and the driving means are fixed at predetermined positions.

In this state, for example, by the regulation switching means,
Switching to a state in which the horizontal movement of the base end of the elevating link member is restricted by the second restricting means, and the base end of the elevating link member and the base fulcrum of the auxiliary link member are driven by the driving means. When you move it so that
Since the base end of the elevating link member is restricted from moving horizontally, the fulcrum of the auxiliary link member on the base side moves horizontally toward the base end of the elevating link member. At this time, similarly to the first-stage lifting operation in the invention according to claim 1, the fulcrum of the auxiliary link member on the lifting link member side moves the lifting link member in a direction intersecting the installation direction of the lifting link member. It acts so as to push out, whereby the end of the lifting link member on the top plate support frame side is centered on the base end of the lifting link member and along the arc with the lifting link member as the radius. Move up. Therefore, the top plate supporting frame is lifted up relative to the base in a diagonal direction (a direction in which the vertical direction and the horizontal direction are combined). Further, the lowering operation of the top plate is the reverse operation to the above, whereby the fulcrum on the base side of the auxiliary link member moves horizontally in the direction away from the end portion on the base side of the elevating link member, and the top plate support frame moves diagonally. Be dropped.

On the other hand, the regulation switching means switches to a state in which the horizontal movement of the fulcrum on the base side of the auxiliary link member is regulated by the first regulating means, and the driving means causes the end portion on the base side of the elevating link member to move. When the auxiliary link member is moved so as to come close to the base-side fulcrum, horizontal movement of the auxiliary link member's base-side fulcrum is restricted, so the base side end of the lifting link member is moved to the base of the auxiliary link member. Move horizontally toward the fulcrum on the side. At this time, the same raising operation as the raising operation of the second stage in the invention described in claim 1 is performed. Here, if the connecting position of the fulcrum on the lifting link member side of the auxiliary link member and the length of the auxiliary link member are appropriately set, the rising direction in this case is set to the horizontal direction of the base end of the lifting link member. It can be different from the ascending direction (oblique direction) when movement is restricted.

For example, the length between the end of the elevating link member on the base side and the connecting point of the elevating link member and the auxiliary link member (the fulcrum of the auxiliary link member on the elevating link member side),
The length between the connecting point of the elevating link member and the auxiliary link member and the end of the elevating link member on the top plate support frame side, the connecting point of the elevating link member and the auxiliary link member, and the base of the auxiliary link member If all of the lengths are the same as the fulcrum on the side, the base end of the elevating link member, the connecting point between the elevating link member and the auxiliary link member, and the fulcrum on the base side of the auxiliary link member are apexes. , And the triangle having the apex of the connecting point between the lifting link member and the auxiliary link member, the fulcrum of the auxiliary link member on the base side, and the end of the lifting link member on the top plate support frame side are always Since it becomes an isosceles triangle, as the base end of the lifting link member horizontally moves toward the fulcrum on the base side of the auxiliary link member as described above, the end of the lifting link member on the top plate holding frame side moves. Part is raised vertically , Thereby, the top plate support frame will be raised in the vertical direction.

Further, the lowering operation of the top plate in this case is the reverse operation to the above, and the base end of the elevating link member horizontally moves in the direction away from the fulcrum of the auxiliary link member on the base side. The support frame is lowered.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. <First Embodiment> FIG. 1 is a front view showing the structure of a main part of a bed apparatus according to a first embodiment of the present invention. FIG.
Shows the state in which the top plate (top support frame) is located at the lowest position. The first embodiment corresponds to the invention described in claim 1 and is an embodiment for achieving the first object of the invention.

In the figure, reference numeral 1 indicates a base installed on the floor, and reference numeral 2 indicates a top plate support frame arranged above the base 1, for raising and lowering the top plate support frame 2 with respect to the base 1. A lifting drive mechanism described below is provided between the base 1 and the top plate support frame 2. A base 3 is configured by the base 1, the top plate support frame 2, and the lifting drive mechanism. A top plate 4 for placing the subject M thereon is horizontally movably supported on the top plate support frame 2, and a horizontal plate (not shown) for horizontally moving the top plate 4 with respect to the top plate support frame 2 is provided. A drive mechanism (similar structure to the mechanism used conventionally) is also provided. The base 3 (base 1, top plate support frame 2, lift drive mechanism), top plate 4, and horizontal drive mechanism constitute a bed apparatus of this embodiment.

Next, the structure of the lifting drive mechanism, which is the main part of the present invention, will be described with reference to FIG. This elevating drive mechanism includes first and second four-bar parallel link mechanisms.
The link members 11 and 12, the auxiliary link member 13, the jack 14, the first stopper 15, the compression coil spring 16, the connecting member 17, the second stopper 18, and the like.

The first and second link members 11 and 12 are obliquely installed in parallel with each other between the base 1 and the top plate supporting frame 2, and the link members 11 and 12 are provided on the top plate supporting frame 2 side. Each end 11a, 12a of the above is rotatably connected to the top plate support frame 2, while each end 11b, 12b on the base 1 side is connected to the base 1 so as to be horizontally movable. In FIG. 1, each end 11b, 12b on the base 1 side is supported by a rail 19 laid on the base 1 and horizontally moved while rotating in FIG. Individual rollers may be provided, and the respective ends 11b and 12b on the base 1 side may be horizontally movable by being rolled by these rollers. This also applies to a fulcrum 13b on the base 1 side of the auxiliary link member 13 (a fulcrum 13c on the top plate support frame 2 side of the auxiliary link member 13 of the second embodiment) described later.

The auxiliary link member 13 is installed so as to intersect the first link member 11 and support the first link member 11 from below, and one end of the auxiliary link member 13 serves as a midpoint of the first link member 11. A fulcrum 13a that is rotatably connected and a fulcrum 13b that is horizontally movably connected to the base 1 at the other end.
Have and. In this embodiment, the length between the end 11a of the first link member 11 on the top plate support frame 2 side and the fulcrum 13a and the end 1 of the first link member 11 on the base 1 side.
The length between 1b and the fulcrum 13a, and the auxiliary link member 13
The lengths of the fulcrums 13a and 13b are equal to each other.

The jack 14 is slidably fitted to a rail or the like between a fulcrum 13b of the auxiliary link member 13 on the base 1 side and an end 11b of the first link member 11 on the base 1 side. The tip end of a screw shaft 14a that is horizontally movable and expands and contracts in the horizontal direction of the jack 14 is connected to a fulcrum 13b on the base 1 side of the auxiliary link member 13 to expand and contract the screw shaft 14a of the jack 14. Thus, the fulcrum 13b of the auxiliary link member 13 on the base 1 side is horizontally moved.

When the fulcrum 13b of the auxiliary link member 13 on the base 1 side is horizontally moved by a predetermined distance toward the end 11b on the base 1 side of the first link member 11, the first stopper 15 has its It is provided to regulate movement.

The compression coil spring 16 is arranged between the first stopper 15 and the jack 14, and the fulcrum 13b of the auxiliary link member 13 on the base 1 side is horizontally moved to the first stopper 15 side. The jack 14 is biased (biased in the direction indicated by the one-dot chain line arrow in the figure).

Then, the connecting member 17 is formed on the base 1 side end portions 11b and 12 of the first and second link members 11 and 12, respectively.
b and the jack 14 are connected to each other.
In conjunction with the horizontal movement of the first and second link members 11,
Each of the end portions 11b and 12b of the base 12 on the side of the base 1 is configured to be horizontally moved.

The second stopper 18 is provided at each end 11 of the first and second link members 11 and 12 on the base 1 side.
Horizontal movement of b and 12b in a direction opposite to the fulcrum 3b on the base 1 side of the auxiliary link member 13 (leftward in the drawing) is restricted. In addition, the end portions 11b and 12b of the first and second link members 11 and 12 on the base 1 side and the end portions 11b and 1b.
The top plate support frame 2 is located at the lowest position with the second stopper 18 restricting the leftward movement of the jack 14 connected by the connecting member 17 and 2b.

In the first embodiment, the first link member 11 is the lifting link member of the invention described in claim 1, the jack 14 is the actuator of the invention described in claim 1, and the compression coil spring 16 is. They correspond to the urging means in the invention described in claim 1.

Next, the ascending / descending operation of the top plate 4 of the apparatus having the above-described structure will be described with reference to FIGS. First, the top plate 4
The raising operation will be described. Top plate support frame 2 (top plate 4)
Is located at the lowest position (ends 11b and 12b on the base 1 side of the first and second link members 11 and 12,
When the horizontal movement of the jack 14 and the second stopper 18 is restricted), that is, when the base 1 and the top plate support frame 2 are closest to each other, as shown by the solid line in FIG. End portion 11 of the link member 11 on the base 1 side
b is farthest from the fulcrum 13b of the auxiliary link member 13 on the base 1 side.

In this state, the jack 14 contracts the screw shaft 14a so that the fulcrum 13 of the auxiliary link member 13 on the base 1 side.
When b is horizontally moved in the direction of the first stopper 15 (left in the figure), the fulcrum 13b of the auxiliary link member 13 on the side of the first link member 11 is moved along with the movement of the fulcrum 13b of the auxiliary link member 13 on the side of base 1. 13a acts so as to push out the first link member 11 in a direction intersecting with the installation direction of the first link member 11 (upper left in the figure). At this time, the jack 14 is fixed on the base 1 by being biased by the compression coil spring 16 and regulated by the second stopper 18, and is connected to the jack 14 by the connecting member 17.
Ends 11 of the second link members 11, 12 on the base 1 side
b and 12b are also fixed. Therefore, due to the acting force of the above-mentioned auxiliary link member 13 on the first link member 11, the end portion 11a of the first link member 11 on the top plate support frame 2 side is With the end portion 11b of the fixed first link member 11 on the base side 1 as the center,
The top plate supporting frame 2 is pushed up to the upper left by moving along the arc having the link member 11 of the radius as a radius, and as a result, the end 12a of the second link member 12 on the top plate supporting frame 2 side is also fixed. The end 12b of the second link member 12 on the base 1 side
With the center as the center and moves up along an arc having the radius of the second link member 12. As a result, the top plate support frame 2 is lifted in the oblique direction (the direction in which the vertical direction and the horizontal direction are combined: the upper left direction) with respect to the base 1 while maintaining the horizontal state.

Then, when the jack 14 further contracts the screw shaft 14a, the movement of the fulcrum 13b of the auxiliary link member 13 on the base 1 side is restricted by the first stopper 15. At this time, as shown in FIG. 2, the top plate support frame 2 is vertically moved by h1 and is horizontally moved by d1 in the horizontal direction (left direction in the drawing).

Then, when the jack 14 contracts the screw shaft 14a thereafter, the jack 14 repels the urging force of the compression coil spring 16 while the auxiliary link member 13 is being repulsed.
The fulcrum 13b on the base 1 side is horizontally moved to the first stopper 15 side in the opposite direction (to the right in the figure). Therefore, the first and second parts connected to the jack 14
End portions 11b on the base 1 side of the link members 11, 12 of
12b is horizontally moved in the same direction as the horizontal movement direction of the jack 14 (direction toward the end 13b of the auxiliary link member 13 on the base 1 side, rightward in the figure). As a result, the first and second link members 11 and 12 are displaced from the oblique state to the upright state, as shown in FIG. 3, while keeping the top plate support frame 2 in a horizontal state, Ascend vertically. Note that, in FIG. 3, the top plate support frame 2 located at the lowest position is shown by a dotted line.

At this time, since the fulcrum 13b of the auxiliary link member 13 on the base side 1 is restricted in its horizontal movement by the first stopper 15, the auxiliary link member 1
The fulcrum 13a of the third link member 11 on the side of the first link member 11 does not give the first link member 11 a force to push it to the upper left as described above. Further, in this embodiment, the length between the top plate support frame 2 side end 11a of the first link member 11 and the fulcrum 13a, and the base 1 side end 11b of the first link member 11 and the fulcrum. Since the length between the support link member 13 and the fulcrums 13a and 13b of the auxiliary link member 13 are all equal,
After the diagonal movement of the top plate support frame 2 described above, the top plate support frame 2 can be vertically raised.

That is, the lifting drive mechanism of the apparatus of the first embodiment first raises the top plate support frame 2 (top plate 4) in an oblique direction (a direction in which the vertical direction and the horizontal direction are combined), and further, Lift the top plate support frame 2 (top plate 4) vertically,
It is possible to perform a two-step raising operation.

Next, the lowering operation of the top plate 4 will be described. This descending operation is performed by the reverse operation of the ascending operation described above. That is, when the top plate support frame 2 (top plate 4) is at the highest position, that is, the top plate support frame 2 (top plate 4) is horizontally moved by d1 in the horizontal direction from the highest position, and vertically ( (h1 + h2), the end 11b of the first link member 11 on the base 1 side is closest to the fulcrum 13b of the auxiliary link member 13 on the base 1 side, and the jack 14 is a compression coil spring. 16 is the most compressed.

In this state, the jack 14 has the screw shaft 14a.
When is extended, due to the restoring force of the compression coil spring 16,
The jack 14 (ends 11b, 12b on the base 1 side of the first and second link members 11, 12) is the auxiliary link member 1
3 away from the fulcrum 13b on the base 1 side (left direction)
Move horizontally to. At this time, the fulcrum 13b of the auxiliary link member 13 on the base 1 side is fixed. As a result, contrary to the above-described ascending operation, the top board support frame 2 descends in the vertical direction while maintaining the horizontal state.

Further, the jack 14 has the screw shaft 1
4a is extended and the 1st, 2nd link member 11,
End portions 11b and 12b on the base 1 side of 12 and the jack 1
When the horizontal movement of 4 and 4 is restricted by the second stopper 18, the fulcrum 1 on the base 1 side of the auxiliary link member 13
3b is a jack 14 (first and second link members 11,
The base 12 is horizontally moved in a direction (rightward) away from the ends 11b and 12b on the base 1 side. As a result, the auxiliary link member 13 acts so as to pull the first link member 11 downward to the right, and the top plate descends in an oblique direction (downward right).

When a bed apparatus constructed on the basis of the above-mentioned principle is used in, for example, an X-ray CT apparatus, as shown in FIG. 4, first, with the tabletop 4 in the lowest position, The subject M is placed on the top plate 4, and then the top plate 4 is raised. At this time, since the top plate 4 (top support frame 2) first rises in the oblique direction, the subject M can be brought closer to the imaging position SP of the gantry 5 by d1. And top plate 4
In order to adjust the height of the subject M, the top plate 4 is further lifted in the vertical direction in a state where is moved vertically from the lowest position by h1 and horizontally moved by d1 in the horizontal direction. The height of the subject M can be adjusted within the range of increasing h2. When the adjustment of the subject M in the height direction is completed, next, the top plate 4 is horizontally moved to insert the subject M into the opening 5a of the gantry 5, and the imaging region of the subject M is moved to the gantry 5. The X-ray tomographic image is photographed by aligning with the photographing position SP of.

When the photographing is completed, the top plate 4 is horizontally moved so as to return to the original position, then the top plate 4 is vertically lowered, and further, the top plate 4 is lowered obliquely to bring it to the top. Board 4
Is positioned at the lowest descent position, and the subject M is lowered from the top 4.

As described above, according to the first embodiment, since the top plate 4 is raised in the oblique direction when the top plate 4 is moved up, the top plate is supported with the base 1 fixed to the floor. The frame 2 and the top plate 4 can be brought close to the photographing position SP of the gantry 5. Therefore, for example, in order to image the same imaged portion, the horizontal movement distance of the top plate 4 can be reduced by d1 in this embodiment, as compared with the case where a conventional apparatus is used. Therefore, when photographing the same photographing part, the top plate 4
Since the load on the table is reduced, the strength of the table 4 and the table 4
It is possible to reduce the strength of supporting the top plate supporting frame 2 from the conventional device. Further, if the strength of the top plate 4 and the support strength of the top plate 4 to the top plate support frame 2 are the same as those of the conventional device, the photographing area can be made wider than that of the conventional device.

Further, the above-mentioned effects are not limited to the case where the apparatus of this embodiment is used for the X-ray CT apparatus, but it is possible to use, for example, MRI.
The same can be obtained when used for a device or a PET device.

In this embodiment, since the base 1 can be fixed to the floor and the top plate support frame 2 can be brought close to the gantry 5, the gantry 5 can be tilted toward the bed apparatus. Even if the base 1 is arranged at a position where the inclined gantry 5 does not interfere with each other, the top plate support frame 2 can be brought closer to the gantry 5 by d1 at the time of photographing. Therefore, even in such an X-ray CT apparatus in which the gantry 5 is tilted, the load applied to the top plate 4 can be reduced as compared with the conventional apparatus.

By the way, since the height of the subject M is adjusted by irradiating the subject M with light, the height of the subject M is adjusted.
It is preferable that the ascending operation is performed in the vertical direction. On the other hand, in this embodiment, as described above, the subject M is subjected to the upward movement in the vertical direction after the upward movement in the oblique direction.
This is useful because fine adjustment can be performed in the height direction of the. Moreover, in this embodiment, the length between the end portion 11a of the first link member 11 on the top plate support frame 2 side and the fulcrum 13a, and the end portion 11b of the first link member 11 on the base 1 side and the fulcrum point. Since the length between the support link member 13 and the fulcrums 13a and 13b of the auxiliary link member 13 are all equal,
After the oblique movement of the top plate support frame 2 described above, the top plate support frame 2 can be accurately lifted in the vertical direction, and fine adjustment of the height of the subject M can be accurately performed.

Next, some modifications of the above-described embodiment will be introduced, but these modifications can be similarly implemented in the apparatus of the second embodiment described next.

In the above embodiment, the compression coil spring 16 is used as the biasing means for biasing the jack 14 in the horizontal movement direction of the fulcrum 13b on the base 1 side of the auxiliary link member 13 toward the first stopper 15 side. Although used, a gas spring may be used instead of the compression coil spring 16.

As the urging means F, other than that,
For example, a tension coil spring or rubber is arranged at a position as shown in FIG. 5, and the jack 14 is attached to the first stopper 15 of the fulcrum 13b of the auxiliary link member 13 on the base 1 side.
You may comprise so that it may be urged | biased to the horizontal movement direction to the side.

Further, in the above embodiment, the fulcrum 13b of the auxiliary link member 13 on the base 1 side and the first link member 11 are provided.
Although the jack 14 is arranged between the end portion 11b of the base 1 side and the end portion 11b of the base 1 side, even if the jack 14 is arranged on the right side of the fulcrum 13b on the base 1 side of the auxiliary link member 13, as shown in FIG. Good. At this time, the urging means F is as shown in FIG.
A compression coil spring, a gas spring or the like may be provided at the position shown by the solid line, or a tension coil spring or rubber may be provided at the position shown by the two-dot chain line in FIG.

In the above embodiment, the jack 14 is used as the actuator, but the actuator may be composed of, for example, a hydraulic cylinder.

Further, the second stopper 1 of the above embodiment.
8 is a first link member 11 as shown in FIG.
The horizontal movement of the end portion 11b on the base 1 side may be restricted, or the horizontal movement of the jack 14 may be restricted as shown in FIG. 7B.

In the above embodiment, the length between the top plate supporting frame 2 side end 11a of the first link member 11 and the fulcrum 13a and the base 1 side end portion of the first link member 11 are determined. 1
The length between 1b and the fulcrum 13a, and the auxiliary link member 13
Although the fulcrums 13a and 13b have the same length, the lengths may be different as shown in FIGS. 8 and 9, for example. However, in FIG. 8, a fulcrum 13a on the first link member 11 side of the auxiliary link member 13
Are connected closer to the end 11a side of the top plate support frame 2 side than the midpoint CP of the first link member 11, and in FIG. 9, the first link member 11 of the auxiliary link member 13 is connected. Since the fulcrum 13a on the side is connected closer to the end 11b side on the base 1 side than the midpoint CP of the first link member 11, the fulcrum 13a is connected to the ceiling as shown in FIGS. 8 and 9. In the second-stage ascending operation after the obliquely ascending operation of the plate 4, the top plate 4 cannot be accurately lifted in the vertical direction, but even with such a configuration, the top plate 4 is lifted. Later on the base 1
On the other hand, if the top plate support frame 2 is close to the shooting position SP of the gantry 5, the load on the top plate 4 at the time of shooting can be reduced. However, since it becomes difficult to accurately perform fine adjustment of the height of the subject M, the length between the end 11a of the first link member 11 on the top plate support frame 2 side and the fulcrum 13a, and the first link. End 11b of member 11 on the base 1 side and fulcrum 1
3a and the fulcrum 13 of the auxiliary link member 13
The configuration of the first embodiment in which the lengths a and 13b are all equal is preferable. In addition, in FIG. 8 and FIG.
The operation explanatory views of (b) and (c) are respectively FIGS.
This corresponds to the operation explanatory diagram of FIG. In addition, in FIG. 8 and FIG.
The components are drawn in a simplified manner.

<Second Embodiment> The configuration of a second embodiment device of the present invention will be described with reference to FIG. FIG. 10 is a front view showing the configuration of the main part of the second embodiment device. FIG.
0 indicates a state in which the top plate (top support frame) is located at the lowest position. The second embodiment also corresponds to the invention described in claim 1 and is an embodiment for achieving the first object of the invention.

The apparatus of the second embodiment is characterized in that the first link member 11 and the auxiliary link member 13 constitute an X-type link mechanism. Specifically, in the auxiliary link member 13 of this embodiment, the midpoint of the first link member 11 having the same configuration as that of the first embodiment and the midpoint of the auxiliary link member 13 are rotatably connected. It has a fulcrum 13a and a fulcrum 13b whose end on the base 1 side is rotatable and horizontally movable with respect to the base 1 and is similar to that of the first embodiment, and also an end on the top plate support frame 2 side. 13 c is connected to the top plate support frame 2 so as to be horizontally movable.

In this embodiment, the length between the end 11a of the first link member 11 on the top plate supporting frame 2 side and the fulcrum 13a and the end of the first link member 11 on the base 1 side. 1
The length between 1b and the fulcrum 13a, and the auxiliary link member 13
Between the fulcrums 13a and 13b of the auxiliary link member 1
The lengths between the three fulcrums 13a and the end 13c on the top plate supporting frame 2 side are all equal.

In addition, the second link member 12 is not provided in this embodiment, and the second stopper 18 is constructed so as to restrict the horizontal movement of the fulcrum 11b of the first link member 11 on the base 1 side. There is. The rest of the configuration is the same as that of the first embodiment device, so the same reference numerals as in FIG. 1 are used, and duplicated description is omitted.

According to the second embodiment, similarly to the apparatus of the first embodiment, first, as shown in FIG.
(Top plate 4) rises diagonally (upper left in the figure), and then
As shown in FIG. 12, it is possible to perform a two-step ascending operation (the same as the descending operation) in which the top plate support frame 2 (top plate 4) rises in the vertical direction. Therefore, it is possible to obtain the same effect as that of the first embodiment device described above.

<Third Embodiment> The configuration of a third embodiment of the present invention will be described with reference to FIG. FIG. 13 is a front view showing the configuration of the main part of the third embodiment device. FIG.
3 shows a state in which the top plate (top plate support frame) is located at the lowest position. The third embodiment corresponds to the invention described in claim 2 and is an embodiment for achieving the second object of the present invention. In the figure, the parts indicated by the same reference numerals as those in FIG.

The elevating and lowering drive mechanism of the third embodiment is similar to the elevating and lowering drive mechanism of the first embodiment, and the first and second link members 11 and 12 and the auxiliary link member 13 constituting the four-bar parallel link mechanism. , Jack 14, connecting member 17, rail 19 and the like, and the first and second stoppers 15 and 18 and the compression coil spring 16 of the lifting drive mechanism of the first embodiment are omitted and replaced with the first, The second restricting members 21, 22,
A changeover switch 23, a changeover circuit 24, etc. are newly provided.

The first and second link members 11, 12, the auxiliary link member 13, the jack 14, the connecting member 17, and the rail 19 have the same structure as in the first embodiment. In addition, in this 3rd Example, the fulcrum 13b by the side of the 1st link member 11 of the auxiliary link member 13 is connected to the midpoint of the 1st link member 11, and the length of the auxiliary link member 13 is a 1st link. The length between the top plate support frame 2 side end 11a of the first link member 11 and the fulcrum 13a and the end of the first link member 11 on the base 1 side so as to be half of the member 11. Part 1
The length between 1b and the fulcrum 13a, and the auxiliary link member 13
The lengths of the fulcrums 13a and 13b are equal to each other.

In the first restricting member 21, the end portion 11b on the base 1 side of the first link member 11 and the fulcrum 13b on the base 1 side of the auxiliary link member 13 are farthest apart (as shown in FIG. 13). This is for restricting the horizontal movement of the fulcrum 13b on the base 1 side of the auxiliary link member 13 when the top plate 4 (top plate support frame 2) is located at the lowest position).

Further, in the state shown in FIG. 13, the second restricting member 22 has the end portion 1 of the first link member 11 on the base 1 side.
This is for restricting the horizontal movement of 1b.

An example of the first and second regulating members 21 and 22 will be described with reference to FIGS. 13 and 14. FIG. 14 (a)
14B is a vertical cross-sectional view of the fulcrum of the auxiliary link member on the base side and the vicinity of the second restricting member as viewed from the left in FIG. 13, and FIG. 14B is an arrow AA of FIG. 14A. FIG.

In the second restricting member 22, the shaft 32, which is driven to expand and contract by supplying / stopping the current to the solenoid coil, is inserted into the drive unit 31 having the solenoid coil installed therein.
A U-shaped holding portion 33 is attached to the tip of the shaft 32. When current is supplied to the solenoid, the shaft 32 is extended and the holding portion 3 is extended, as shown by the imaginary line in FIG.
3 holds a fulcrum 13b (rotating shaft 41 in FIG. 14) of the auxiliary link member 13 on the base 1 side, and restricts horizontal movement of the fulcrum 13b of the auxiliary link member 13 on the base 1 side. on the other hand,
When the current supply to the solenoid coil is stopped, the shaft 32 contracts, the holding portion 33 is retracted inside the base 1 and the holding by the holding portion 33 is released, and the fulcrum of the auxiliary link member 13 on the base 1 side is released. Horizontal movement of 13b (rotating shaft 41 as described later) is allowed.

In FIG. 14, two auxiliary link members 13 are formed, and the base end of each auxiliary link member 13 is rotatably connected to the rotary shaft 41. A wheel 42 is connected to the. Each wheel 42 is fitted on the rail 19 so as to be horizontally moved while rotating (in FIG. 14A, moved in a direction perpendicular to the paper surface).
The screw shaft 14a of the jack 14 is rotatably connected to the receiving member 43 connected to the vicinity of the central portion of the rotary shaft 41. As a result, due to the expansion and contraction of the screw shaft 14a, each wheel 42 moves along the rail 19 in the direction perpendicular to the paper surface of FIG. 14A (this is the base 1 of the auxiliary link member 13).
The fulcrum 13b on the side is moved horizontally). The vicinity of the fulcrum 13b on the base 1 side of the auxiliary link member 13 is configured as described above, for example, and the second restricting member 22 has a pair of U-shaped holding portions 33 with the receiving member 43 interposed therebetween. By receiving the rotary shaft 41, the horizontal movement of the fulcrum 13b (the rotary shaft 41, each wheel 42, etc.) of the auxiliary link member 13 on the base 1 side is restricted. In addition, a plurality of rollers 44 on the rail 19
14 (indicated by a dotted line in FIG. 14A) is internally provided along the longitudinal direction of the rail 19 and rolled by these rollers 44,
The wheels 42 and the rotary shaft 41 may be horizontally moved without rotating. Base 1 of the first link member 11
The side end portion 11b and the first restraint member 21 have substantially the same configuration.

The switching circuit 24 supplies / stops the current to each solenoid coil of the first and second regulating members 21 and 22. This changeover circuit 24 is based on a changeover instruction from the changeover switch 23, and the first and second regulating members 21, 2
The current is supplied to either one of the solenoid coils 2 and the supply of the current to the other solenoid coil is stopped. That is, the switching circuit 24 allows the horizontal movement of the end portion 11b of the first link member 11 on the base 1 side,
In addition, the horizontal movement of the fulcrum 13b of the auxiliary link member 13 on the base 1 side is restricted, and the horizontal movement of the end 11b of the first link member 11 on the base 1 side is restricted, and
A state in which the horizontal movement of the fulcrum 13b on the base 1 side of the auxiliary link member 13 is allowed is switched by a switching instruction from the switching switch 23. The changeover switch 23 is attached to, for example, a side surface of the top plate support frame 2, and is configured by a button switch or the like that can instruct to change any of the above states.

In the third embodiment, the first link member 11 is the lifting link member in the invention described in claim 2, and the jack 14 and the connecting member 17 are the driving means in the invention described in claim 2. , The first and second restriction members 21,
Reference numeral 22 corresponds to the first and second regulating means in the invention described in claim 2, and the changeover switch 23 and the switching circuit 24 correspond to the regulation switching means in the invention described in claim 2, respectively.

Next, the ascending / descending operation of the top plate 4 of the apparatus having the above-described structure will be described with reference to FIGS. 13, 15 and 16.
First, as shown in FIG. 13, a state in which the top plate 4 (top plate support frame 2) is positioned at the lowest position (the end 1 b of the first link member 11 on the base 1 side and the base 1 of the auxiliary link member 13).
Side fulcrum 13b, the horizontal movement of the end 11b of the first link member 11 on the base 1 side is restricted, and the horizontal movement of the fulcrum 13b of the auxiliary link member 13 on the base 1 side is restricted. The ascending operation in the case where the switching is performed so as to be allowed (state of FIG. 13) will be described.

At this time, as shown in FIG.
(Top support frame 2) rises in an oblique direction (upper left). Since this operation is based on the same operation as the first upward tilting operation of the first embodiment, a detailed description thereof will be omitted. Note that the descending operation in this case is performed in the reverse operation of the oblique ascending operation.

On the other hand, as shown in FIG. 13, the top plate 4 (top plate support frame 2) is in the most lowered position (the end portion 11b of the first link member 11 on the base 1 side and the auxiliary link member 1).
3 is the farthest from the fulcrum 13b on the base 1 side), the end 11b on the base 1 side of the first link member 11
The horizontal movement of the auxiliary link member 13 is permitted, and the ascending operation when the horizontal movement of the fulcrum 13b of the auxiliary link member 13 on the base 1 side is restricted will be described.

At this time, as shown in FIG.
(Top support frame 2) rises vertically. This behavior is
Since it is based on the same action as the vertical movement of the second stage in the first embodiment, its detailed description is omitted. The descent operation in this case is performed in the reverse operation of the vertical ascending operation.

In the state where the top plate 4 is located at the most lowered position, the end portion 11 of the first link member 11 on the base 1 side is formed.
b, the fulcrum 13b of the auxiliary link member 13 on the base 1 side and the jack 14 are placed at predetermined positions, for example, the horizontal movement of the end 11b of the first link member 11 on the base 1 side is restricted, and The horizontal movement of the fulcrum 13b of the auxiliary link member 13 on the base 1 side is permitted, and the horizontal movement of the end 11b of the first link member 11 on the base 1 side is permitted, and the base of the auxiliary link member 13 is permitted. When switching to the state in which the horizontal movement of the fulcrum 13b on the first side is regulated, the second regulation member 22 regulates the horizontal movement of the end 11b of the first link member 11 on the base 1 side, The first regulating member 21 regulates the horizontal movement of the end portion 13b of the auxiliary link member 13 on the base 1 side, and then the second regulating member 22 regulates the end portion 11b of the first link member 11 on the base 1 side. Horizontal It is performed in the procedure to release the restriction of movement. Further, in the opposite case, the regulation by the first and second regulating members 21 and 22 is switched in the same procedure.

Further, for example, the top plate 4 (top plate support frame 2)
Is located at the lowest position, the first and second regulating members 21 and 22 serve as the base 1 side end 11b of the first link member 11 and the base 1 side fulcrum 13 of the auxiliary link member 13.
Both horizontal movements of b are regulated, and the base 1 side end 11b of the first link member 11 and the fulcrum of the auxiliary link member 13 on the base 1 side are supported before the raising operation of FIG. 15 or 16 is performed. You may switch so that the horizontal movement of either 13b may be restricted.

As described above, according to the third embodiment, the top switch 4 (top support frame 2) is moved up and down diagonally and vertically in response to the switching instruction from the switch 23. It is possible to appropriately switch between two types of raising and lowering operations including the operation.

For example, as shown in FIG. 17, an X-ray fluoroscope 6 is arranged between the gantry 5 and the bed of the X-ray CT apparatus, and the X-ray fluoroscope 6 picks up an X-ray fluoroscopic image. When observing the diffusion state of the contrast agent, the top plate 4 is lifted in the vertical direction, and then the top plate 4 is horizontally moved to move an arbitrary part between the X-ray tube 6a and the imaging system 6b. It can be located at the imaging position SP6 and an X-ray fluoroscopic image of that part can be taken.

On the other hand, as shown in FIG. 18, when the X-ray fluoroscope 6 arranged between the gantry 5 and the bed apparatus of the X-ray CT apparatus is moved and removed, and an X-ray tomographic image is taken by the gantry 5. In this case, the top plate 4 is raised in an oblique direction, and then the top plate 4 is horizontally moved to position an arbitrary part at the imaging position SP, and an X-ray tomographic image of the part can be taken.

In the first and second embodiments, the X-ray C
An X-ray fluoroscope 6 is provided between the gantry 5 of the T apparatus and the bed apparatus.
When observing the diffusion state of the contrast agent by capturing an X-ray fluoroscopic image with this X-ray fluoroscope 6, the top plate 4 must be raised in an oblique direction. In this case, the top plate support frame 2 may interfere with the X-ray tube 6a when the top plate support frame 2 is raised in an oblique direction, and as shown in FIG. It will cross the imaging position SP6. Unlike the top plate 4, the top plate support frame 2 is configured to include various X-ray shielding members. Therefore, in the case of FIG. 19, the top plate support frame 2 allows the X-ray fluoroscopic image of the X-ray fluoroscope 6 to be seen. Will not be properly imaged. On the other hand, in the third embodiment,
The subject M can be suitably placed and transferred to each of the two types of diagnostic devices.

Next, some modified examples of the third embodiment will be introduced, but these modified examples can be similarly modified and implemented in the apparatus of the fourth embodiment described next.

In the above embodiment, the horizontal movement of the end portion 11b of the first link member 11 on the base 1 side is prevented from moving horizontally to the second regulating member 2.
Although it is configured to be regulated by 2, the end portions 11b and 12b of the first and second link members 11 and 12 on the base 1 side are connected by the connecting member 17, so that the second link member 1
Even if the horizontal movement of the end portion 12b of the first base member 1 on the base 1 side is regulated by the second regulating member 22, the horizontal movement of the end portion 11b of the first link member 11 on the base 1 side is controlled by the second movement. It is equivalent to the restriction by the restriction member 22. Similarly, since the end portion 11b of the first link member 11 on the base 1 side and the jack 14 are connected by the connecting member 17, the horizontal movement of the jack 14 is prevented by the second restricting member as shown in FIG. Even if it is configured to be regulated by 22, the first link member 1
This is equivalent to restricting the horizontal movement of the end portion 11b of the first base 1 side by the second restriction member 22.

Further, in the above-described embodiment, the screw shaft 14a of the jack 14 is connected to the fulcrum 13b on the base 1 side of the auxiliary link member 13, but as shown in FIG.
4 is connected to the end portion 11b of the first link member 11 on the base 1 side, and the jack 14 and the auxiliary link member 1 are connected.
3 of the fulcrum 13b on the base 1 side, and the end portions 11b, 12 of the first and second link members 11, 12 on the base 1 side.
The b may be connected by the connecting member 17. In this case, as in the case of FIG. 20, the horizontal movement of the jack 14 is restricted by the first restriction member 21 to restrict the horizontal movement of the fulcrum 13b of the auxiliary link member 13 on the base 1 side. It will be possible.

Further, in the above embodiment, the auxiliary link member 1
The jack 14 is arranged between the fulcrum 13b of the first link member 11 on the base 1 side and the end 11b of the first link member 11 on the base 1 side. For example, as shown in FIG. The jack 14 may be arranged on the right side of the fulcrum 13b on the first side.

Further, the jack 14 may be replaced by a hydraulic cylinder or the like. Further, the regulation switching means is not limited to the configuration of the above embodiment, but may be configured by a mechanical switching mechanism.

In the above embodiment, the length between the end 11a of the first link member 11 on the top plate supporting frame 2 side and the fulcrum 13a, and the end of the first link member 11 on the base 1 side. 1
The length between 1b and the fulcrum 13a, and the auxiliary link member 13
The lengths of the fulcrums 13a and 13b are all equal, and the vertical movement is performed when the horizontal movement of the fulcrum 13b of the auxiliary link member 13 on the base 1 side is restricted. The purpose of No. 2 is to suitably place and transfer the subject to each of the two types of diagnostic devices. Therefore, for example, as in the modification of FIGS. 8 and 9 for the first embodiment, the auxiliary link member is provided. 13 when the connection position of the fulcrum 13b on the side of the first link member 11 and the length of the auxiliary link member 13 are appropriately set to restrict horizontal movement of the fulcrum 13b of the auxiliary link member 13 on the side of the base 1. The operation may be configured to be different from the elevating operation when the horizontal movement of the end portion 11b of the first link member 11 on the base 1 side is restricted. In the case of FIG. 17, it is most preferable to vertically move the top plate 4 in order to properly place and transfer the subject M, and at least the upper left side of FIG. 17 (however, this diagonal direction is It is preferable to move up and down in a direction closer to the vertical direction than the diagonal direction in the case of 18.

<Fourth Embodiment> The configuration of a fourth embodiment of the present invention will be described with reference to FIG. FIG. 23 is a front view showing the configuration of the main part of the fourth embodiment device. Note that FIG.
3 shows a state in which the top plate (top plate support frame) is located at the lowest position. The fourth embodiment also corresponds to the invention described in claim 2, and is an embodiment for achieving the second object of the invention. In the figure, the parts denoted by the same reference numerals as those in FIGS. 10 and 13 have the same configurations as those in the second and third embodiments, and therefore detailed description thereof will be omitted.

In the fourth embodiment, the first link member 11 is used.
Based on the configuration of the second embodiment in which the X-type link mechanism is configured by the auxiliary link member 13 and the auxiliary link member 13, the top plate 4 (top plate 4 (top plate) is operated by a switching instruction from the changeover switch 23 as in the third embodiment. The support frame 2) is configured to be capable of appropriately switching between an operation of vertically moving the support frame 2) and an operation of vertically moving the support frame 2).

24 and 25 show the respective operating states of the vertical movement of the top and bottom of the top plate 4 (top support frame 2) according to the fourth embodiment.

Also according to the fourth embodiment, the above-mentioned third embodiment is used.
It is possible to obtain the same effect as that of the apparatus of the embodiment.

[0093]

As is apparent from the above description, according to the invention described in claim 1, the top plate support frame is raised in the oblique direction (the direction in which the vertical direction and the horizontal direction are combined), and thereafter, Since the elevation drive mechanism is configured to further raise the top plate support frame, the top plate support frame can be brought close to the imaging position of the gantry such as the X-ray CT apparatus in the raising operation of the top plate support frame. Therefore, the distance between the imaging position of the gantry and the first imaging region of the subject placed on the top plate when the lifting of the top plate support frame (top plate) is completed can be made shorter than the conventional device, It is possible to reduce a wasteful horizontal movement distance that is not involved in the photographing of the top during photographing. Therefore, when the bed apparatus according to the present invention is used to image the same imaged portion, the horizontal movement distance of the tabletop is shorter than that when the bed apparatus according to the conventional example is used. The load on the plate can be reduced. In addition, according to the present invention, even if the strength of the top plate and the strength of supporting the top plate to the top plate support frame are the same as those of the conventional device, since the top plate support frame itself is close to the photographing position, the photographing area is set to the conventional device. Can be taken wider than.

According to the second aspect of the present invention, it is possible to appropriately switch the lifting operation of the two types of top plate support frames by switching the restriction switching means. Therefore, for example, an X-ray fluoroscopic apparatus is arranged between the gantry of the X-ray CT apparatus and the bed apparatus according to the present invention, and the diffusion state of the contrast material is observed by the X-ray fluoroscopic apparatus, and the X-ray fluoroscopic apparatus. The case of moving and removing the X-ray to capture an X-ray tomographic image with a gantry.
The subject can be suitably placed and transferred to each of the two types of diagnostic devices, such that the raising and lowering operation of the top plate support frame can be suitably performed in each case.

[Brief description of drawings]

FIG. 1 is a front view showing a configuration of a main part of a bed apparatus according to a first embodiment of the present invention.

FIG. 2 is a view for explaining an ascending operation of the apparatus of the first embodiment in an oblique direction.

FIG. 3 is a diagram for explaining a vertical raising operation of the device of the first embodiment.

FIG. 4 is a diagram for explaining the operation when the apparatus of the first embodiment is used in an X-ray CT apparatus.

FIG. 5 is a front view showing a configuration of a main part of a modified example of the first embodiment device.

FIG. 6 is a front view showing the configuration of the main part of another modification of the first embodiment device.

FIG. 7 is a front view showing a configuration of a main part of still another modification of the device of the first embodiment.

FIG. 8 is a front view showing the configuration and operation of a main part of still another modification of the first embodiment device.

FIG. 9 is a front view showing the configuration and operation of a main part of still another modification of the device of the first embodiment.

FIG. 10 is a front view showing the configuration of the main part of the second embodiment device.

FIG. 11 is a front view showing an ascending operation of the apparatus of the second embodiment.

FIG. 12 is a front view showing a vertically moving operation of the second embodiment device.

FIG. 13 is a front view showing the configuration of the main part of the third embodiment device.

FIG. 14 is a diagram showing a configuration of a first restriction member and the like of the device of the third embodiment.

FIG. 15 is a front view showing an ascending operation of the apparatus of the third embodiment.

FIG. 16 is a front view showing the operation of the apparatus of the third embodiment in the vertical direction.

FIG. 17 is a diagram showing an operation when an image is picked up by the X-ray fluoroscopic apparatus in the apparatus of the third embodiment.

FIG. 18 is an X-ray CT apparatus (gantry) in the apparatus of the third embodiment.
FIG. 6 is a diagram showing an operation when an X-ray tomographic image is captured by the method.

FIG. 19 is a diagram for explaining a problem when imaging is performed by the X-ray fluoroscopic apparatus in the first and second embodiments.

FIG. 20 is a front view showing the configuration and operation of a main part of a modified example of the device of the third embodiment.

FIG. 21 is a front view showing the configuration and operation of the main parts of another modification of the third embodiment device.

FIG. 22 is a front view showing the configuration and operation of the main parts of yet another modification of the third embodiment device.

FIG. 23 is a front view showing the configuration of the main parts of the fourth embodiment device.

FIG. 24 is a front view showing an ascending operation of the fourth embodiment device.

FIG. 25 is a front view showing the operation in the vertical direction of the device of the fourth embodiment.

FIG. 26 is a diagram showing a schematic configuration and operation of a bed apparatus according to a conventional example.

FIG. 27 is a diagram for explaining the operation when the conventional apparatus is used for an X-ray CT apparatus.

FIG. 28 is a diagram for explaining a problem of the conventional device.

FIG. 29 is a diagram for explaining a problem of the conventional device.

[Explanation of symbols]

 1 ... Base 2 ... Top plate support frame 3 ... Base 4 ... Top plate 11 ... 1st link member (elevation link member) 13 ... Auxiliary link member 13a, 13b ... Support point 14 ... Jack (actuator) 15 ... 1st Stopper 16 ... Compression coil spring (biasing means) 17 ... Connecting member 18 ... Second stopper 21 ... First restricting member (first restricting means) 22 ... Second restricting member (second restricting means) 23 ... Changeover switch 24 ... Changeover circuit M ... Subject

Claims (2)

[Claims] 1. A base including a base installed on the floor, a top plate support frame arranged above the base, and a lift drive mechanism for moving the top plate support frame up and down with respect to the base. A bed device including a top plate for subject placement supported on the top plate support frame so as to be horizontally movable, and a horizontal drive mechanism for horizontally moving the top plate with respect to the top plate support frame, The lifting drive mechanism is (a) obliquely installed between the base and the top plate support frame, one end of which is rotatably connected to the top plate support frame, and the other end of which is attached to the base. An elevating link member horizontally movably connected, and (b) a fulcrum that is installed in a state of intersecting the elevating link member and supporting the elevating link member from below and rotatably connected to the elevating link member. , A fulcrum horizontally connected to the base An auxiliary link member having; (c) an actuator which is installed so as to be horizontally movable with respect to the base and horizontally moves a fulcrum on the base side of the auxiliary link member; and (d) a fulcrum on the base side of the auxiliary link member. A first stopper that restricts the movement of the lifting link member when it is horizontally moved toward a base-side end portion by a predetermined distance; and (e) a first stopper side of a base-side fulcrum of the auxiliary link member. Urging means for urging the actuator in the direction of horizontal movement to the actuator, (f) a connecting member that connects the base-side end of the lifting link member and the actuator, and (g) the lifting link member. A bed including a mechanism including a second stopper that restricts horizontal movement of the end portion on the base side in a direction opposite to the fulcrum on the base side of the auxiliary link member. Location. 2. A base comprising a base installed on the floor, a top plate support frame arranged above the base, and a lift drive mechanism for moving the top plate support frame up and down with respect to the base. A bed device including a top plate for subject placement supported on the top plate support frame so as to be horizontally movable, and a horizontal drive mechanism for horizontally moving the top plate with respect to the top plate support frame, The lifting drive mechanism is (a) obliquely installed between the base and the top plate support frame, one end of which is rotatably connected to the top plate support frame, and the other end of which is attached to the base. An elevating link member horizontally movably connected, and (b) a fulcrum that is installed in a state of intersecting the elevating link member and supporting the elevating link member from below and rotatably connected to the elevating link member. , A fulcrum horizontally connected to the base An auxiliary link member having; (c) drive means connected to the base-side end of the elevating link member and a fulcrum of the auxiliary link member on the base side; and (d) the elevating link member. First restriction means for restricting horizontal movement of the base side fulcrum of the auxiliary link member in a state where the base side end of the auxiliary link member is farthest from the base side fulcrum of the auxiliary link member; ) A second part for restricting horizontal movement of the base end of the elevating link member with the base end of the elevating link member and the base fulcrum of the auxiliary link member being most distant from each other.
And (f) the first means before starting the ascending operation.
Between the state in which the horizontal movement of the fulcrum on the base side of the auxiliary link member is regulated by the regulating means and the state in which the horizontal movement of the end portion on the base side of the lifting link member is regulated by the second regulating means. A bed apparatus comprising a mechanism including a regulation switching means for switching to either one of the states.