JP2017086602A - Medical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surgical table capable of operating smoothly and stably at low cost in a medical device having a lifting device using a plurality of lifting blocks.SOLUTION: A medical device comprises a base 2 placed on a floor surface, a table 10 disposed above the base 2, and a lifting device 20 for raising and lowering the table 10. The lifting device 20 comprises: a fixed block 21 fitted to the base 2; a plurality of lifting blocks 26, 27 integrally provided in the fixed block 21 and combined so as to be raised and lowered in a vertical direction; and a plurality of cylinder units 51A, 51B serially connected through flow paths 58, 59, for raising and lowering lifting blocks 26, 27 by hydraulic pressure of a hydraulic fluid supplied to the flow paths 58, 59. A part of the flow path 58, 59 is formed inside the cylinder unit 51A.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a medical device, and more particularly, to a lifting device used for an operating table.

  Since it is necessary for the operating table to move a specific part of the patient to a position where a doctor can easily treat it, the operating table is required to have a function of changing the height of the table on which the patient is placed. In addition, an operating table provided with a lifting device that lifts and lowers a table has been known (see Patent Document 1).

  For example, an elevating device used in an operating table shown in Patent Literature 1 includes a plurality of cylinders in which rotation between the cylinders is prevented, and a single cylinder device that expands and contracts these cylinders. The plurality of cylinders move up and down by performing a telescopic movement by driving (see Patent Document 1).

JP 2002-209957 A

  By the way, when performing raising / lowering operation with one cylinder device, there is a limit to the height that can be raised and lowered, and the size tends to be large, and it is difficult to lower the floor of the operating table.

  In order to solve such a problem, for example, as shown in FIG. 10, a plurality of lifting blocks 102 and 103 connected in parallel via linear motion guides or the like are lifted and lowered using a cylinder device 105. In this case, since a large load is applied to the rubbing portion 107, malfunction is likely to occur due to secular change.

  In addition, although a plain bearing is used for the linear motion guide, it can operate smoothly and stably over a long period of time, but the manufacturing cost increases.

  In addition, when a plurality of lifting blocks connected in parallel are sequentially moved up and down using a plurality of cylinder devices in which flow paths for supplying hydraulic oil are connected in series, the flow paths are expanded and contracted according to the expansion and contraction of each cylinder device. Although it is necessary to expand and contract the flow path, there are cases where the flow path is disconnected from the connection portion or interferes with other members.

  Therefore, in order to solve an example of such a problem, the present application provides a medical device that can operate smoothly and stably at a low cost in a medical device including a lifting device using a plurality of lifting blocks. With the goal.

  In order to solve the above-described problem, the medical device (S) according to claim 1 is a medical device that lifts and lowers the table (10) via the lifting device (20), and the lifting device moves up and down in the vertical direction. A plurality of lifting blocks (26, 27) and a plurality of lifting blocks (26, 27) connected in series through the flow paths (58, 59) and moving up and down each lifting block by hydraulic oil pressure supplied to the flow paths. Cylinder units (51A, 51B), and a part of the flow path is formed inside the cylinder unit (51A).

  Further, the medical device (S) according to claim 2 includes a base (2) placed on the floor, a table (10) disposed above the base, and a lift for raising and lowering the table. In the medical device including the device (20), the lifting device is provided integrally with the fixed block (21) attached to the base and the fixed block, and is lifted and lowered in the vertical direction and combined in parallel. A plurality of cylinder units (51A) that are connected in series via the elevating blocks (26, 27) and the flow paths (58, 59), and elevate each elevating block by the hydraulic pressure of the hydraulic oil supplied to the flow paths. 51B), and part of the flow path is formed inside the cylinder unit (51A).

  The medical device according to claim 3 is the medical device according to claim 2, wherein the fixing block and the plurality of lifting blocks have a dovetail groove (31) having a cross section formed in an inverted C shape and extending in a vertical direction. ) And a protrusion (32) fitted in the dovetail groove, and a guide portion (33) provided with the dovetail groove.

  Moreover, the medical device of Claim 4 is a medical device as described in any one of Claims 1-3, The flow path which connects two said cylinder units adjacent via the said raising / lowering block in series. The other part (58b, 59b) is provided along the lifting block.

  The medical device according to claim 5 is the medical device according to any one of claims 1 to 4, wherein the cylinder unit includes a main body (54) having a hollow interior and a bottom chamber in the main body. (52a) and a rod chamber (52b), and a piston rod (55) provided in the main body so as to be extendable and contractible. A part of the flow path (70, 80) is formed on the piston rod. It is characterized by being.

  In a multi-stage lifting device that drives a plurality of cylinders that lift and lower a plurality of lifting blocks connected in parallel to each other in series, the lifting and lowering operation can be performed smoothly and stably at low cost.

It is a schematic diagram which shows the structural example of an operating table. It is a schematic diagram which shows the example of an external appearance of a raising / lowering apparatus. It is a schematic diagram which shows the AA sectional drawing of FIG. It is a schematic diagram which shows the raising / lowering operation example of an raising / lowering apparatus. It is a schematic diagram which shows the BB sectional drawing of FIG. It is a figure which shows the structural example of a hydraulic system. FIG. 7A is a schematic diagram illustrating an example of an extension operation, and FIG. 7B is a schematic diagram illustrating an example of a contraction operation. It is a schematic diagram which shows the other example of installation of a communication path. It is a schematic diagram which shows the other example of installation of a communication path. It is a schematic diagram which shows the operation example of an raising / lowering apparatus.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings. In the following description, hydraulic oil refers to a fluid used as a power transmission medium in a hydraulic cylinder device. In addition, the operating table S of the present embodiment includes a medical table and a treatment table having different uses. Further, the lifting device used in the operating table S of the present embodiment can be applied to various medical devices used in the medical field.

  As shown in FIG. 1, the operating table S includes a base 2 that is placed on the floor of the operating room, a column 5 that stands on the base 2, and a table 10 that is attached to the column 5. ing. A lifting device 20 shown in FIG. 2 is provided in the column 5, and the table 10 is adjusted to a desired height by moving the table 10 up and down by a lifting operation by the lifting device 20.

  As shown in FIGS. 2 to 5, the lifting device 20 is provided integrally with the fixed block 21 so as to be slidable via a fixed block 21 fixed to the base 2 and a guide portion 30 extending in the vertical direction. The elevating block 25 and the elevating unit 40 for elevating the elevating block 25 along the guide portion 30 are provided. And the raising / lowering block 25 raises / lowers in the vertical direction via the guide part 30, as shown in FIG.

  As shown in FIGS. 2 and 3, the elevating block 25 is configured integrally by combining a plurality of blocks (elevating blocks according to the present application) 26 and 27 in parallel, for example, a first block adjacent to the fixed block 21. Block 26 and a second block 27 adjacent to the first block 26.

  As shown in FIG. 2, the first and second blocks 26 and 27 are aligned at the same height as the fixed block 21. As shown in FIGS. 3 and 4, the first block 26 is It is attached to the fixed block 21 so as to be slidable in the vertical direction via the guide portion 30a. Further, the second block 27 is attached to the first block 26 so as to be slidable in the vertical direction via another guide portion 30b, and the table 10 is attached to the upper end portion thereof as shown in FIG. It is attached. In other words, each of the first and second blocks 26 and 27 is provided so as to be movable up and down in the vertical direction via the guide portions 30a and 30b.

  Moreover, although the raising / lowering block 25 which comprises the raising / lowering apparatus 20 of this embodiment is comprised combining several blocks 26 and 27 in parallel, it is not limited to this form, For example, the fixed block 21 A plurality of raising / lowering blocks may be arranged around the upper and lower parts, and each raising / lowering block may be attached so as to be slidable in the vertical direction as in the present embodiment. That is, the elevating blocks 26 and 27 do not need to be arranged linearly and sequentially, and can be applied to various forms.

  As shown in FIGS. 3 to 5, for example, as shown in FIG. 3, the guide portion 30 is fitted in the dovetail groove 31 with a dovetail groove 31 that has a transverse section formed in an inverted C shape and extends in the vertical direction. The elevating block 25 is rubbed and moved in the vertical direction via the dovetail portion 33. The dovetails 31 and the protrusions 32 are only required to be formed in adjacent blocks, and are not limited to the form shown in FIG.

  In place of the dovetail portion 33, rail guide type guide means, known guide means, or the like may be used. In the present embodiment, the number of blocks constituting the elevating block 25 is two. However, the number is not limited to this number, and may be larger, depending on the desired height of the table 10 and the like. The number is set as appropriate. Furthermore, the height of the table 10 can be adjusted higher while reducing the floor of the table 10 by combining more blocks.

  Moreover, the raising / lowering unit 40 is provided with the hydraulic system 50 which raises / lowers the 1st block 26 and the 2nd block 27 in order. As shown in FIG. 6, the hydraulic system 50 includes a cylinder device 51 that is extended and contracted by liquid (hydraulic oil), a hydraulic circuit 57 that is connected to the cylinder device 51, and a cylinder device 51 that is connected to the cylinder device 51 via the hydraulic circuit 57. A hydraulic pressure generating unit 61 that supplies hydraulic oil and a valve unit 62 that is provided in the hydraulic circuit 57 and switches a flow path through which the hydraulic oil passes are provided.

  The cylinder device 51 includes, for example, two sets of double-acting and hydraulic cylinder units (hereinafter, referred to as “first cylinder unit 51A” and “second cylinder unit 51B” in order from the fixed block side). As shown in FIG. 5, each cylinder unit 51A, 51B is mounted such that its expansion / contraction direction is vertical, and as shown in FIGS. 3 and 5, the first cylinder unit 51A is fixed block 21. The second cylinder unit 51 </ b> B is disposed between the first block 26 and the second block 27. The first block 26 and the second block 27 are moved up and down by driving the cylinder units 51A and 51B to extend and contract.

  As shown in FIG. 6, the cylinder device 51 includes a pair of cylinders 60, and each cylinder 60 has a chamber 52 that is hollow inside, and the chamber 52 is separated by a piston 53 into a bottom chamber 52 a and a rod chamber 52 b. And a piston rod 55 attached to a piston 53 disposed in the main body 54 so as to be slidable in the axial direction. The hydraulic oil sent from the hydraulic pressure generating unit 61 causes the piston rod to A driving force for expanding and contracting 55 is generated.

  As shown in FIG. 5, the cylinder units 51A and 51B are arranged with the bottom chambers 52a of the main bodies 54 of the cylinders 60 and 60 arranged in parallel downward, and the main body 54 of the first cylinder unit 51A is The piston rod 55 of the first cylinder unit 51A is attached to a holding body 28 provided at the front upper end of the first block 26. The piston rod 55 is held by the hole 21a formed in the fixed block 21. The main body 54 of the second cylinder unit 51B is held by a hole 26a formed in the first block 26, and the piston rod of the second cylinder unit 51B is provided at the upper front end of the second block 27. Is attached to the holding body 28.

  Further, as shown in FIG. 6, the main body 54 of each cylinder 60 is formed with a bottom side port 63 for supplying hydraulic oil to the bottom chamber 52a and a rod side port 64 for supplying hydraulic oil to the rod chamber 52b. Yes.

  In the cylinder units 51A and 51B, when hydraulic oil is supplied to the bottom chamber 52a via the bottom port 63 and hydraulic pressure is applied to the surface of the piston 53 on the bottom chamber 52a side, the piston 53 moves to the rod chamber 52b side. Then, the piston rod 55 is pushed out from the rod chamber 52b to extend.

  On the other hand, in the cylinder units 51A and 51B, when hydraulic oil is supplied to the rod chamber 52b via the rod side port 64 and hydraulic pressure acts on the surface of the piston 53 on the rod chamber 52b side, the piston 53 moves to the bottom chamber 52a side. Then, the piston rod 55 is drawn into the rod chamber 52b and contracts.

  The lifting / lowering amount (table height) of the lifting block 25 is adjusted by changing the total length of the cylinder units 51a and 51b by the extending or contracting operation of the piston rod 55.

  The hydraulic circuit 57 supplies a bottom side circuit 58 that supplies hydraulic oil to the bottom chamber 52a to cause the cylinder units 51A and 51B to extend (FIG. 7A), and supplies hydraulic oil to the rod chamber 52b to provide the cylinder unit. Rod side circuit 59 for causing 51a, 51b to perform a contracting operation (FIG. 7B), and each circuit 58, 59 has flow paths 58b, 59b for connecting a plurality of cylinder units 51A, 51B in series. .

  Further, the bottom side circuit 58 and the rod side circuit 59 connect the cylinder unit 51 </ b> A to the hydraulic pressure generation unit 61 via the valve unit 62.

  The hydraulic pressure generation unit 61 includes a pump P and an oil tank T, and is connected to the valve unit 62 by a predetermined pipe. Then, hydraulic oil is supplied from the pump P to the valve unit 62 at a predetermined pressure, and the hydraulic oil is returned from the valve unit 62 to the oil tank T. The valve unit 62 is connected to the bottom side port 63 and the rod side port 64 of the first cylinder unit 51A via a predetermined pipe.

  Further, when supplying the hydraulic oil to one port, the valve unit 62 switches the flow path so as to return the hydraulic oil from the other port to the tank T.

  As shown in FIG. 7A, the bottom side circuit 58 includes a first flow path 58a connected to each bottom side port 63 of the first cylinder unit 51A via a hydraulic pressure generating unit 61 and a valve unit 62. And a second flow path 58b that communicates the bottom chamber 52a of the first cylinder unit 51A and the bottom side port 63 of the second cylinder unit 51B. The second flow path 58b is a first cylinder unit. It is connected to the bottom side port 63 of the second cylinder unit 51B through a communication passage 70 formed in 51a.

  The communication passage 70 is provided in one cylinder rod 55 and the piston 53, extends in the axial direction of the piston rod 55, is formed through the piston rod 55 and the piston 53, and is connected to one piston of the first cylinder unit 51a. The tip of the rod 55 and the bottom chamber 52a of one main body 54 are communicated with each other. Further, the communication passage 70 and the bottom side port 63 of the second cylinder unit 51 </ b> B are connected by a metal pipe disposed along the first block 26. The material of the tube may be any material, and the tube may be directly formed in the first block 26, and the hole may be used as a substitute for the tube.

  According to the bottom side circuit 58 configured in this way, since the two cylinder units 51A and 51B are connected in series, first, the second cylinder unit via the bottom chamber 52a of the first cylinder unit 51A. After the bottom chamber 52a of 51B is filled with hydraulic oil and the second cylinder unit 51B is raised, the bottom chamber 52a of the first cylinder unit 51A is filled with hydraulic oil and the first cylinder unit 51A is raised. Therefore, the elevating unit 40 of the present embodiment can sequentially raise the cylinder units 51A and 51B and sequentially raise the first and second blocks 26 and 27.

  On the other hand, as shown in FIG. 7B, the rod-side circuit 59 is connected to each rod-side port 64 of the first cylinder unit 51A via the hydraulic pressure generating unit 61 and the valve unit 62. 59a, and a fourth channel 59b that communicates the rod chamber 52b of the first cylinder unit 51A and the rod-side port 64 of the second cylinder unit 51B, and the fourth channel 59b It is connected to the rod side port 64 of the second cylinder unit 51B via a communication passage 80 formed in the cylinder unit 51A.

  The communication passage 80 is provided in the other piston rod 55 and extends so as to penetrate in the axial direction of the piston rod 55 and is formed in communication with the rod chamber 52b. Further, the communication passage 80 and the rod-side port 64 of the second cylinder unit 51 </ b> B are connected by a metal pipe arranged along the first block 26. Any material may be used for the tube, and the tube may be directly formed in the first block 26, and the hole may be substituted for the tube.

  According to the rod side circuit 59 configured in this way, since the two cylinder units 51A and 51B are connected in series, first, the second cylinder is connected via the rod chamber 52b of the first cylinder unit 51A. After the rod chamber 52b of the unit 51B is filled with the working oil and the second cylinder unit 51B is lowered, the rod chamber 52b of the first cylinder unit 51A is filled with the working oil and the first cylinder unit 51A is lowered. To do. Therefore, the elevating unit 40 of this embodiment can sequentially lower the cylinder units 51A and 51B and sequentially lower the first and second blocks 26 and 27.

  In the present embodiment, the pipe connecting the valve unit 62 and the bottom side port 63 of the first cylinder unit 51A is connected in parallel so as to communicate with the bottom chambers 52a of the pair of cylinders 60. The hydraulic oil is supplied to the chambers 52a and 52a at the same time. However, after communicating with the valve unit 62 and the bottom chamber 52a of one cylinder 60, the bottom chamber 52a of one cylinder 60 and the other cylinder 60 are connected. The bottom chambers 52a may be connected in series so as to communicate with each other, and hydraulic oil may be sequentially supplied to the bottom chambers 52a and 52a. Also, the pipes or flow paths 58b and 59b connecting the valve unit 62 and the rod side port 64 of the first cylinder unit 51A may be connected in series as described above.

  As described above, the hydraulic circuit 57 according to the present embodiment forms the communication passages 70 and 80 in the cylinder device 51, so that the cylinder units 51 </ b> A and 51 </ b> B are connected to each other in accordance with the elevation of the blocks 26 and 27. There is no need to extend or contract the paths 58b and 59b. Therefore, it is not necessary to design the arrangement of the flow paths 58b and 59b, so that the design cost and space saving of the flow paths 58b and 59b can be easily achieved. In addition, when the flow paths 58b and 59b are expanded and contracted according to the elevation of the blocks 26 and 27 as in the prior art, it is necessary to take into account the leakage of the connection portion due to the expansion and contraction operation of the flow paths 58b and 59b and interference with other members. There is no risk of such a problem.

  Next, an operation example of the hydraulic system 50 will be described with reference to FIG.

  When hydraulic fluid is supplied from the hydraulic pressure generating unit 61 to the bottom side circuit 58, first, each main body 54 of the second cylinder unit 51B is connected via the bottom chamber 52a and the communication passage 70 of each main body 54 of the first cylinder unit 51A. When the bottom chamber 52a is filled with hydraulic oil, the piston rod 55 of the second cylinder unit 51B is raised, and the second block 27 is raised.

  Next, the first block 26 is raised by raising the piston rod 55 of the first cylinder unit 52A by filling the bottom chamber 52a of each main body 54 of the first cylinder unit 51A with hydraulic oil. To do.

  As the second block 27 rises, the hydraulic oil in the rod chamber 52b of the second cylinder unit 51B flows into the flow path 59b connected to the first cylinder unit 51A, the communication passage 80, and the first cylinder unit. It is discharged from the rod side port 64 of the first cylinder unit 51A through the rod chamber 52b of 51A, returned to the tank T through the valve unit 62, and further, the first block 26 is lifted to raise the first The hydraulic oil in the rod chamber 52b of the cylinder unit 51A is discharged from the rod side port 64 of the first cylinder unit 51A, and returned to the tank T via the valve unit 62.

  On the other hand, when hydraulic oil is supplied from the hydraulic pressure generating unit 61 to the rod side circuit 59, first, the second cylinder unit 51B is connected via the rod chamber 52b and the communication passage 80 of each main body 54 of the first cylinder unit 51A. When the rod chamber 52b of each main body 54 is filled with the hydraulic oil, the piston rod 55 of the second cylinder unit 51B is lowered, so that the second block 27 is lowered.

  Next, the first block 26 is lowered by lowering the piston rod 55 of the first cylinder unit 51A by filling the rod chamber 52b of each main body 54 of the first cylinder unit 51A with hydraulic oil. To do.

  As the second block 27 is lowered, the hydraulic oil in the bottom chamber 52a of the second cylinder unit 51B flows into the flow path 58b connected to the first cylinder unit 51A, the communication passage 70, and the first cylinder unit. It is discharged from the bottom side port 63 of the first cylinder unit 51A through the bottom chamber 52a of 51A, returned to the tank T through the valve unit 62, and further, the first block 26 is lowered to cause the first The hydraulic oil in the bottom chamber 52a of the cylinder unit 51A is discharged from the bottom port 63 of the first cylinder unit 51A and returned to the tank T through the valve unit 62.

  Next, another embodiment of the communication passages 70 and 80 formed in the cylinder unit 51A will be described.

-First Example-
A first embodiment of the communication passages 70 and 80 will be described with reference to FIG. In the cylinder unit 100 in FIG. 8, the same reference numerals are given to the portions common to the first cylinder unit 51 </ b> A shown in FIG. 7, and descriptions thereof are omitted. The cylinder unit 100 functions as the first cylinder unit 51A of the above embodiment.

  The cylinder unit 100 according to the present embodiment includes a pair of cylinders 101, and as shown in FIG. 8, the cylinder 101 has a chamber 52 that is hollow inside, and the chamber 52 is bottomed by a piston 53. A main body 54 partitioned into a chamber 52 a and a rod chamber 52 b, and a piston rod 55 attached to a piston 53 disposed in the main body 54 so as to be slidable in the axial direction thereof. A driving force for expanding and contracting the piston rod 55 is generated by the hydraulic oil.

  As shown in FIG. 8, the main body 54 is formed with a bottom side port 63 for supplying hydraulic oil to the bottom chamber 52a and a rod side port 64 for supplying hydraulic oil to the rod chamber 52b.

  In addition, two communication passages 70 and 80 are formed in parallel inside the piston rod 55 of the present embodiment. The communication passage 70 extends in the axial direction of the piston rod 55 and is formed so as to penetrate the piston rod 55 and the piston 53, and the tip end portion of the piston rod 55 of the cylinder 101 and the bottom chamber 52 a of the main body 54 are communicated with each other.

  On the other hand, the communication passage 80 is formed so as to extend in the axial direction of the piston rod 55 and communicate with the rod chamber 52 b of the main body 54.

  Then, when hydraulic oil is supplied from the bottom port 63 to the bottom chamber 52a of the cylinder unit 100, first, from the bottom port 63 of the second cylinder unit 51B (not shown) to the bottom chamber 52a via the communication passage 70. After the hydraulic oil is filled and the second block 27 is raised, the bottom chamber 52a of the cylinder unit 100 is filled with the hydraulic oil, and when hydraulic pressure acts on the surface of the piston 53 on the bottom chamber 52a side, the rod chamber 52b side The piston 53 moves, the piston rod 55 is pushed out from the inside of the rod chamber 52b and extended, and the first block 26 is raised.

  On the other hand, when hydraulic oil is supplied from the rod side port 64 to the rod chamber 52b of the cylinder unit 100, first, the rod side port 64 of the second cylinder unit 51B (not shown) is connected to the rod chamber 52b via the communication passage 80. After the hydraulic oil is filled and the second block 27 is lowered, the rod chamber 52b of the cylinder unit 100 is filled with the hydraulic oil, and when hydraulic pressure acts on the surface of the piston 53 on the rod chamber 52b side, the bottom chamber 52a side is moved. The piston 53 moves, the piston rod 55 is drawn into the rod chamber 52b, and contracts to move the first block 26 downward.

  As described above, in the cylinder unit 100 (first cylinder unit 51 </ b> A) of this embodiment, the two communication passages 70 and 80 are formed in parallel inside the piston rod 55. Therefore, as shown in the above embodiment (FIG. 7), it is not necessary to provide two cylinders 60, and the size can be reduced.

-Second Example-
A second embodiment of the communication passages 70 and 80 will be described with reference to FIG. In the cylinder unit 110 in FIG. 9, the same reference numerals are given to portions common to the first cylinder unit 51 </ b> A shown in FIG. 7, and descriptions thereof are omitted. The cylinder unit 110 functions as the first cylinder unit 51A of the above embodiment.

  The cylinder unit 110 of this embodiment is composed of a pair of cylinders 111, and as shown in FIG. 9, the cylinder 111 has a chamber 52 that is hollow inside, and the chamber 52 is bottomed by a piston 53. A main body 54 partitioned into a chamber 52a and a rod chamber 52b, and two piston rods 55A and 55B attached in parallel to the piston 53 disposed in the main body 54 so as to be slidable in the axial direction thereof, A driving force for expanding and contracting the piston rod 55 is generated by the hydraulic oil sent from the hydraulic pressure generating unit 61.

  As shown in FIG. 9, the main body 54 is formed with a bottom side port 63 for supplying hydraulic oil to the bottom chamber 52a and a rod side port 64 for supplying hydraulic oil to the rod chamber 52b.

  In addition, a communication passage 70 is formed inside one piston rod 55A of the present embodiment, and a communication passage 80 is formed inside the other piston rod 55B. The communication passage 70 extends in the axial direction of the piston rod 55 </ b> A and penetrates the piston rod 55 </ b> A and the piston 53, and communicates the tip of the piston rod 55 </ b> A and the bottom chamber 52 a of the main body 54.

  On the other hand, the communication passage 80 is formed so as to extend in the axial direction of the piston rod 55 </ b> B and communicate with the rod chamber 52 b of the main body 54.

  When hydraulic fluid is supplied from the bottom port 63 to the bottom chamber 52a of the cylinder unit 110, first, the second cylinder unit 51B (not shown) is first connected via the communication passage 70 formed in one piston rod 55A. After the bottom chamber 52a is filled with the working oil from the bottom side port 63 and the second block 27 is raised, the bottom chamber 52a of the cylinder unit 110 is filled with the working oil, and the surface of the piston 53 on the bottom chamber 52a side is hydraulically charged. Acts, the piston 53 moves to the rod chamber 52b side, and the two piston rods 55A and 55B are pushed out from the inside of the rod chamber 52b and extend to raise the first block 26.

  On the other hand, when hydraulic oil is supplied from the rod side port 64 to the rod chamber 52b of the cylinder unit 110, first, the rod side of the second cylinder unit 51B is connected via the communication passage 80 formed in the other piston rod 55B. The rod chamber 52b is filled with the working oil from the port 64, and the second block 27 is lowered. Thereafter, the rod chamber 52b of the cylinder unit 110 is filled with the working oil, and the oil pressure acts on the surface of the piston 53 on the rod chamber 52b side. Then, the piston 53 moves to the bottom chamber 52a side, and the two piston rods 55A and 55B are drawn into the rod chamber 52b to perform the contraction operation, and the first block 26 is lowered.

  Thus, in the cylinder unit 110 (first cylinder unit 51A) of the present embodiment, two piston rods 55A and 55B are provided in parallel to the piston 53, and a communication passage 70 is formed in one piston rod 55A. A communication passage 80 is formed in the other piston rod 55B. Therefore, as shown in the above embodiment (FIG. 7), it is not necessary to provide two cylinders 60, and the size can be reduced.

  As described above, the operating table S of the present embodiment includes the base 2 placed on the floor, the table 10 disposed above the base 2, and the lifting device 20 that lifts and lowers the table 10. The lifting device 20 includes a fixed block 21 attached to the base 2, a plurality of blocks 26 and 27 that are integrally provided on the fixed block 21, are vertically moved and combined in parallel, and a bottom A plurality of cylinder units 51A and 51B that are connected in series via a side circuit 58 and a rod side circuit 59, and that move up and down the blocks 26 and 27 by hydraulic pressure of hydraulic oil supplied to the circuits 58 and 59, respectively. Part of the flow paths 58a and 58b included in the circuits 58 and 59 are formed in the cylinder unit 51A.

  In addition, the operating table S includes a fixed block 21 and a plurality of blocks 26 and 27 each having a dovetail 31 having a cross section formed in an inverted C shape and extending in a vertical direction, and a protrusion 32 fitted into the dovetail 31, Are combined through a guide portion 30 having

  The other portions of the flow paths 58b and 59b included in the circuits 58 and 59 are disposed along the blocks 26 and 27, respectively.

  Further, the cylinder unit 51A includes a main body 54 having a hollow inside, a piston rod 55 that partitions the inside of the main body 54 into a bottom chamber 52a and a rod chamber 52b, and is provided on the main body 54 so as to be extendable and contractible. A part of the flow paths 58 b and 59 b included in the piston rod 55 is formed.

  As described above, the operating table S of the present embodiment includes the lifting device 20 that moves the table 10 in the vertical direction by moving the blocks 26 and 27 up and down in order, and a plurality of cylinder units 51 </ b> A that lift and lower the blocks 26 and 27. Since some of the flow paths 58b and 59b that connect 51B in series are provided inside the cylinder unit 51A, it is not necessary to expand and contract the flow paths 58b and 59b by expanding and contracting the cylinder units 51A and 51B.

  Therefore, it is not necessary to use a stretchable material for the flow paths 58b and 59b, and it is not necessary to consider the arrangement of the flow paths 58b and 59b. Therefore, the design cost of the flow paths 58b and 59b can be reduced.

  Moreover, the blocks 26 and 27 are combined by the dovetail part 33, and can operate | move smoothly and stably over a long period of time.

  As described above, the operating table S of the present embodiment can be operated smoothly and stably over a long period of time while having a simple structure, and the flow path layout design accompanying the lifting operation of the lifting block is designed. There is no need to do this, and the design cost can be reduced.

  In addition, this embodiment is one form and is not limited to this form. For example, the number of cylinder bodies used in the cylinder unit is set as appropriate, and is not limited to this embodiment. In the present embodiment, the elevating device 20 is designed to raise or lower the first block 26 (first cylinder unit 51A) after the second block 27 (second cylinder unit 51B). However, the present invention is not limited to this form, and the order is not particularly limited. Here, the design assumes that the hydraulic oil flows through the flow path with no load, and the first block 26 and the second block 27 are actually supplied or discharged with hydraulic oil. If the hydraulic oil is loaded by the diameter of the flow path or the hydraulic circuit, it may not operate strictly in sequence.

S operating table 2 base 5 column 10 table 20 lifting device 21 fixing block 25 lifting block 50 fixing device 51A first cylinder unit 51B second cylinder unit

Claims (5)

In a medical device that lifts and lowers a table via a lifting device,
The lifting device is
A plurality of elevating blocks combined so as to elevate in the vertical direction;
A plurality of cylinder units connected in series via the flow path and moving up and down each lifting block by the hydraulic pressure of the hydraulic oil supplied to the flow path,
A medical device, wherein a part of the flow path is formed in the cylinder unit. A base placed on the floor;
A table disposed above the base;
A lifting device for lifting and lowering the table;
A medical device comprising:
The lifting device is
A fixed block attached to the base;
A plurality of lifting blocks which are provided integrally with the fixed block and combined so as to move up and down in the vertical direction;
A plurality of cylinder units connected in series via the flow path and moving up and down each lifting block by the hydraulic pressure of the hydraulic oil supplied to the flow path,
A medical device, wherein a part of the flow path is formed in the cylinder unit.   The fixed block and the plurality of elevating blocks are combined through a guide portion having a dovetail groove whose cross section is formed in an inverted C shape and extends in the vertical direction, and a protrusion 32 fitted into the dovetail groove. The medical device according to claim 2, wherein:   The other part of the flow path that connects two cylinder units adjacent to each other through the lifting block is provided along the lifting block. The medical device according to Item.   The cylinder unit includes a main body having a hollow inside, and a piston rod that partitions the inside of the main body into a bottom chamber and a rod chamber, and is provided in the main body so as to be extendable and contractible. The medical device according to any one of claims 1 to 4, wherein the medical device is formed.

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