JPH0321232Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention provides a delivery table, an operating table,
Regarding medical tables such as examination tables.

[Summary of the idea]

The present invention provides a medical table configured to control the inclination of a human body support part using a hydraulic cylinder.
There is a system in which the hydraulic cylinder is constituted by a pair of double-acting cylinders having a predetermined connection relationship, so that the number of directional control valves can be reduced and the human body support part can be tilted smoothly.

[Conventional technology]

2. Description of the Related Art Conventionally, operating tables and the like have been configured so that the body support table can be tilted at a predetermined angle in order to facilitate medical treatment of the flanks, etc. of a patient lying supine on the body support table. The inclination of the human body support table is controlled by a control mechanism as shown in FIGS. 4 and 5.

FIG. 4 shows a control mechanism using single-acting cylinders, in which a piston rod 41 and a cylinder 42 are connected to a pair of single-acting cylinders rotatably attached to a pedestal 61 of an operating table 60 and a human body support table 62, respectively. The moving cylinders 40a and 40b are driven by the hydraulic circuit 45 to move the human body support table 62 to the rotational fulcrum O.
It is configured to be tilted in the directions of arrows a and b with the center at the center.

Next, FIG. 5 shows a control mechanism using a double-acting cylinder, in which the above-mentioned single-acting cylinder 40
A pair of double acting cylinders 50 instead of a and 40b
a, 50b, this pair of double acting cylinders 50
a and 50b are driven by a hydraulic circuit 55 to tilt the human body support table 62 in the directions of arrows a and b.

[Problem that the invention attempts to solve]

The single acting cylinders 40a, 4 shown in FIG. 4 above
According to the control mechanism using 0b, when a load W in the direction of arrow c is applied to the human body support table 62, for example,
Forces in the directions of arrows e and f act on the single acting cylinders 40a and 40b, respectively. However, although single-acting cylinders can generally support loads in the compression direction (direction of arrow e), they cannot support loads in the opposite direction (direction of arrow f), so the above-mentioned load W can only be supported by the single-acting cylinder 40a. become. Therefore, the support and fixation of the human body support table 62 tends to be insufficient, which is not practical.

Next, the double acting cylinder 50 shown in FIG.
According to the control mechanism using the cylinders a and 50b, there is no inconvenience as in the case of the single-acting cylinders 40a and 40b described above. Since it is necessary to inflow and discharge oil, a large number of solenoid valves 57 must be used.
This has the drawback that the number of parts increases, the circuit configuration becomes complicated, and the cost of parts becomes very high.
In order to eliminate such drawbacks, for example, the double-acting cylinder 50a may be removed and the double-acting cylinder 50a may be removed.
If the human body support table 62 is supported by one Ob, the number of electromagnetic valves 57 can be saved, but there is a drawback that the support of the human body support table 62 becomes unstable.

Therefore, the present invention aims to provide a medical table that can eliminate the above-mentioned drawbacks of the conventional technology.

[Means for solving problems]

The present invention uses a hydraulic cylinder connected to a hydraulic circuit through a directional control valve to control the inclination of the body support part of the medical table, so that when one end of the body support part goes up and down, the other end goes down and down. In the medical table configured to rise, the hydraulic cylinder includes a first double-acting cylinder connected to the one end side of the human body support part, and a second double acting cylinder connected to the other end side of the human body support part. It consists of a double acting cylinder,
The first and second double-acting cylinders have substantially the same structure and size as each other, and each of the first and second double-acting cylinders has a piston rod connected to the cylinder. an internal space is divided into a first internal space and a second internal space, the piston rod is disposed in the first internal space, and oil flows into the first and second internal spaces. and the piston is configured to move relative to the cylinder as the ejection is performed, and the first and second pistons are configured to move relative to the cylinder.
An oil passage is provided between one of the first internal spaces and the second internal spaces of the double-acting cylinder to prevent the movement of oil between the one internal spaces. and connect the respective internal spaces of the other internal spaces to the directional control valve so that when oil flows into one internal space of the other internal spaces, oil flows out from the other internal space. It is configured so that it can be discharged.

[Effect]

According to the present invention, when oil is selectively introduced into or discharged from each internal space connected to the directional control valves of the pair of double-acting cylinders through the directional control valves, each piston of the pair of double-acting cylinders moved relative to the cylinder. At this time, oil flows into and out of the internal spaces between which the oil passage is provided.

〔Example〕

An embodiment in which the present invention is applied to a delivery table that also serves as an operating table will be described below with reference to the drawings.

As shown in FIG. 3, a human body support table 2 for supporting the human body is provided on the upper part of the delivery table 1 which also serves as an operating table, and a body support table 2 for supporting the human body is provided on the side of the delivery table 1. Accordingly, the delivery table 1 is provided with rails 3 for attaching accessory parts such as leg supports.

The human body support table 2 is attached to the pedestal 4 of the delivery table 1 by its attachment portion 2a so as to be rotatable in the directions of arrows a and b in FIGS. 2A and 3.

At the bottom of the human body support table 2, as shown in FIGS. 2A to 2C, there are a pair of left and right double-acting cylinders 1.
0 and 11 are arranged. The pair of left and right double-acting cylinders 10 and 11 are hydraulic cylinders for rotating the human body supporting table 2 in the directions of arrows a and b to control the tilt of the human body supporting table 2 in the lateral direction (directions of arrows a and b). and both consist of the same double-acting cylinder and therefore have substantially the same configuration and size as each other. One double acting cylinder 10 is connected to the left end of the human body support table 2, and the other double acting cylinder 11 is connected to the right end of the human body support table 2, so that the left end of the human body support table 2 is connected to the left end of the human body support table 2. When going up and down, the right end goes down and up.

The double-acting cylinders 10 and 11 are cylinders 12a,
12b, and piston rods 16a, 16b connected to pistons 13a, 13b are rotatably attached to the human body support table 2 and the pedestal 4, respectively. The inner spaces of the cylinders 12a and 12b of the double-acting cylinders 10 and 11 are filled with the piston 13.
a, 13b to the first internal space 14a, 14
The piston rods 16a and 16b are arranged on the first inner spaces 14a and 14b.

The double-acting cylinders 10 and 11 have a first internal space 14, as shown in FIGS. 1 and 2A to 2C.
a and 14b are connected to each other to form an oil passage 17 therebetween, and second internal spaces 15a and 15b are connected to a hydraulic circuit 20 through electromagnetic valves 21 to 24, respectively. The reason why the oil passage 17 is provided between the first internal spaces 14a and 14b in this way is to enable oil to flow in and out between the first internal spaces 14a and 14b, and to allow oil to flow between the first internal spaces 14a and 14b. This is to eliminate the need for a solenoid valve for inflowing and discharging pressure oil. By arranging the piston rods 16a and 16b so as to allow oil to move between the first internal spaces 14a and 14b having the same volume, oil can flow in and out between the internal spaces 14a and 14b. When the pistons 13a and 13b
The amount of movement and speed of movement will be the same.

Next, the operation of the above embodiment will be explained based on FIG. 1 and FIGS. 2A to 2C.

First, when switch A (not shown) is turned on to tilt the human body support table 2 in the direction of arrow a,
A fixed displacement hydraulic pump 30 to which an electric motor 31 and a relief valve 32 are connected sucks hydraulic oil from an oil tank 34 through a suction filter 33 and increases the pressure of the hydraulic oil. and the solenoid valve 23.

In addition, by turning on the switch A, the solenoid valve 2
Solenoids 21b and 24b of 1 and solenoid valve 24 are excited, respectively, and spools 21a and 24a move toward arrow g against the spring force of springs 21c and 24c, respectively.
being pushed in a direction. As a result, the pressure oil applied to the solenoid valve 21 is applied to the second internal space 15b of the double-acting cylinder 11 through the check valve 26, and the cylinder 12b of the double-acting cylinder 11 is
It is moved in the direction of arrow i in Figure A.

On the other hand, as the cylinder 12b of the double-acting cylinder 11 moves in the direction of arrow i, the oil in the first internal space 14b of the double-acting cylinder 11 flows through the oil passage 17 to the first internal space 14a of the double-acting cylinder 10. , thereby causing the cylinder 1 of the double-acting cylinder 10 to
2a is moved in the direction of arrow l in FIGS. 1 and 2A. At this time, the amount of movement of the cylinder 12b in the direction of arrow i and the amount and speed of movement of the cylinder 12a in the direction of arrow l are the same, so the human body support table 2 is smoothly rotated in the direction of arrow a, and the second B Tilt as shown.

Note that as the cylinder 12a of the double-acting cylinder 10 moves in the direction of arrow l, the oil in the second internal space 15a of the double-acting cylinder 10 flows into the tank 34 through the solenoid valve 24 and the variable throttle valve 27. be done.

Next, when the human body support table 2 is tilted to a desired position and the switch A is turned off, the solenoids 21b and 24b of the solenoid valve 21 and the solenoid valve 24 are de-energized, and the spools 21a and 24a are activated by the spring 2, respectively.
It is moved in the direction of arrow h by the spring force of 1c and 24c. As a result, the solenoid valves 21 and 24 are turned off as shown in FIG.
is stopped at the desired position. At this time, the human body support table 2 is supported on both sides by a pair of double-acting cylinders 10 and 11, and the double-acting cylinders 10 and 1
1 can support the loads in the directions of arrows k, l and i, j, respectively, by the oil flowing into the first internal spaces 14a, 14b and the second internal spaces 15a, 15b, so that the human body No matter what kind of load is applied to the support table 2, the two double-acting cylinders 10 and 11 ensure that the human body support table 2
is supported and fixed.

Next, when switch B (not shown) is turned on to tilt the human body support table 2 in the direction of arrow b,
Pressure oil is supplied from the hydraulic pump 30 to the solenoid valves 21 and 2.
3, and the solenoid valve 23 and the solenoid valve 2
The two solenoids 23b and 22b are excited, and the spools 23a and 22a are respectively excited by the spring 23.
It is pushed in the direction of arrow g against the spring force of c and 22c. As a result, the pressure oil that has been applied to the solenoid valve 23 is applied to the second internal space 15a of the double-acting cylinder 10 through the check valve 28, and the double-acting cylinder 1
0 cylinder 12a is indicated by the arrow k in FIGS. 1 and 2A.
direction.

On the other hand, as the cylinder 12a of the double-acting cylinder 10 moves in the direction of arrow k, the oil in the first internal space 14a of the double-acting cylinder 10 flows through the oil passage 17 to the first internal space 14b of the double-acting cylinder 11. is flowing into the country. As a result, the cylinder 12b of the double-acting cylinder 11 is moved in the direction of the arrow j in FIGS. It flows into tank 34 through valve 29.

In this way, cylinder 1 of double-acting cylinder 10
2a in the direction of arrow k and the cylinder 12b of the double-acting cylinder 11 in the direction of arrow j, the human body support table 2 is rotated in the direction of arrow b in FIG. 2A, as shown in FIG. 2C. tilted like this. Then, when the human body support table 2 is tilted to the desired position and the switch B is turned off, the solenoid valve 2
3 and the solenoids 23b, 22b of the electromagnetic valve 22 are de-energized, and the spools 23a, 22a are moved in the direction of the arrow h by the spring force of the springs 23c, 22c, respectively. As a result, the electromagnetic valves 23 and 22 are turned off as shown in FIG. 1, and the human body support table 2 is stopped and fixed at a desired position.

As described above, according to the embodiment described above, the load applied to the human body support table 2 can be reliably supported by the pair of left and right double-action cylinders 10 and 11.

In addition, an oil passage 17 is provided between the first internal spaces 14a, 14b of the pair of double-acting cylinders 10, 11, and oil flows in and out between the first internal spaces 14a, 14b. ,
It is possible to save the electromagnetic valves and associated throttle valves for inflowing and discharging pressure oil into and out of these first internal spaces 14a and 14b.

Furthermore, the oil passage 17 is connected to the piston rods 16a, 1
The first internal space 14 on the side where 6b is arranged
Since the pistons 13a and 14b are provided between the pistons 13a and 14b, when oil flows in and out between the first internal spaces 14a and 14b, the pistons 13a and 14b
The relative movement amount and movement speed of the cylinder 13b with respect to the cylinders 12a and 12b are the same. Therefore, when the human body support table 2 rotates, the pistons 13a,
It is possible to effectively prevent variations in the rotating speed of the human body support table 2 or wobbling of the human body support table 2 caused by an imbalance in the relative movement amount and movement speed of the cylinder 13b with respect to the cylinders 12a and 12b. .

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various effective modifications can be made based on the technical idea of the present invention. For example, the oil passage 17 can be connected to the double-acting cylinders 10, 11.
provided between the second internal spaces 15a and 15b,
The first internal spaces 14a and 14b may be configured to be connected to the electromagnetic valves 21 to 24, respectively.

Furthermore, instead of the electromagnetic valves 21 to 24, various types of directional control valves such as lever type and mechanical type can be used as the directional control valves.

Further, the piston rods 16a, 16b of the double-acting cylinders 10, 11 are rotatably attached to the human body support table 2, and the piston rods 16a, 16b of the double-acting cylinders 10, 11 are
is rotatably mounted on the pedestal 4, and the pistons 13a,
13b and piston rods 16a, 16b, the human body support table 2 may be rotated.

Furthermore, a pair of double acting cylinders 10, 11
may control the inclination of the human body support table 2 in the longitudinal direction.

The present invention is applicable not only to delivery tables but also to various medical tables such as operating tables and examination tables.

[Effect of idea]

According to the present invention, one end of the human body support part is raised and moved by using the first double acting cylinder connected to one end side of the human body support part and the second double acting cylinder connected to the other end side. Since the inclination of the human body support part is controlled so that the other end descends and rises when it descends, the human body is The support part can be supported and fixed reliably.

Furthermore, since oil flows into and out of the internal spaces of the first and second double-acting cylinders where oil passages are provided, it is necessary to connect these internal spaces to the hydraulic circuit. This eliminates the need for a directional control valve for inflowing and discharging oil, making it possible to reduce the number of parts, simplify the hydraulic circuit, and reduce parts cost.

Furthermore, the first and second double-acting cylinders have substantially the same structure and size as each other, and the first internal spaces in which the piston rods of the pair of double-acting cylinders are disposed are spaced apart from each other or the piston rods are arranged. Since the configuration is such that an oil passage is provided between the second internal spaces that are not arranged, when oil flows in and out through the oil passage between the internal spaces where the oil passage is provided, a pair of The relative movement amount and movement speed of each piston of the double-acting cylinder with respect to the cylinder can be made exactly the same. Therefore, it is difficult to effectively prevent the human body support from being tilted smoothly due to the difference in the relative movement amount and movement speed of each piston of the pair of double-acting cylinders with respect to the cylinder, which causes a feeling of anxiety to the patient. can.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment in which the present invention is applied to a delivery table that also serves as an operating table.
The figure is a hydraulic circuit diagram, Figures 2A to 2C are schematic diagrams showing the operation of important parts, and Figure 3 is a perspective view of the entire delivery table. Moreover, FIGS. 4 and 5 are schematic diagrams showing the prior art. In addition, in the symbols used in the drawings, 1... Delivery table, 2... Human body support table, 10, 11... Double acting cylinder, 12a, 12b... Cylinder, 13
a, 13b... Piston, 14a, 14b... First internal space, 15a, 15b... Second internal space, 16a, 16b... Piston rod, 17...
...Oil passage, 20...Hydraulic circuit, 21, 22, 23,
24... Solenoid valve.

Claims (1)

[Claims for Utility Model Registration] A hydraulic cylinder connected to a hydraulic circuit through a directional control valve is used to control the inclination of the human body support part of the medical table, so that when one end of the human body support part is raised and lowered, the other end is In a medical table configured such that its ends descend and rise, the hydraulic cylinder includes a first double-acting cylinder connected to the one end side of the human body support part and a first double acting cylinder connected to the other end side of the human body support part. a second double-acting cylinder, wherein the first and second double-acting cylinders have substantially the same structure and size as each other, and each of the first and second double-acting cylinders The internal space of the cylinder is divided into a first internal space and a second internal space by a piston to which the piston rod is connected, and the piston rod is disposed in the first internal space, and the piston rod is disposed in the first internal space, and and the piston is configured to move relative to the cylinder by inflowing and discharging oil into and out of the second internal space, and the first and second double-acting cylinders An oil passage is provided between one of the first internal spaces and the second internal spaces to enable movement of oil between the one internal spaces, and the other The respective internal spaces of the internal spaces are connected to the directional control valve so that when oil flows into one internal space of the other internal spaces, oil is discharged from the other internal space. A medical table characterized by the following configuration.