JP2015198736A - Single upright knee ankle foot orthosis - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a single upright knee ankle foot orthosis in which a knee joint of equipment is locked and prevents knee bending in the direction bending further when a heel part of a foot of a diseased side wearing a single upright knee ankle foot orthosis is grounded on the ground, alternatively, the equipment is unlocked and in a free state when the knee joint bends in the extension direction, and the locking of the knee joint is released and the knee of the diseased side can freely be bent and straightened when the heel part of the foot is not grounded on the ground.SOLUTION: A single upright knee ankle foot orthosis includes a thigh rear support part 2, a knee front support part 3, a crus rear support part 4 and a stirrup part 5. These are made from a light-weight and reinforced plastic material. A flexible and extendable knee joint 63 is provided in the middle of a top one side strut 61. A sensor 9 for detecting the heel part 52 of the stirrup part 5 grounding on the ground is provided. A knee joint activator 7 operating based on information from the sensor 9 is provided. When the heel part 52 is not grounded on the ground, the knee joint 63 is made free in either of the extending and bending directions. When the heel part is grounded on the ground, the knee joint 63 is prevented from being bent in the knee bending direction and is made free in the extending direction.

Description

  In this invention, each support portion that supports the rear surface of the thigh, the front surface below the knee, and the rear surface of the lower leg is made of a lightweight / reinforced plastic material, and each support portion is supported by one side strut. When the affected heel of the affected foot is in contact with the ground, the knee joint of the brace is locked to prevent the knee from being bent while flexing freely in the direction of extending the knee joint, and the heel of the foot is separated from the ground. The present invention relates to a one-leg post-length lower limb orthosis in which the knee joint is unlocked when it floats, and the affected knee can be flexed and extended freely.

In the rehabilitation of stroke hemiplegia, it is considered important to promote functional recovery at an early stage by orthosis therapy in the acute phase and the recovery phase. Among these, the long leg orthosis can prevent the knee from being bent, and can exert the effects of the muscles around the hip joint, which are important for standing, sitting and walking, with the maximum performance, and the effect of extracting the movement of the ankle can be expected. Currently, making custom-made long leg braces is a common treatment.
As shown in FIG. 6, the long lower limb orthosis 101 includes, for example, upper and lower support portions 102 that support each of the thigh, lower knee, and lower leg, and stirrups 103 on which the soles ride on both sides in the vertical direction. A structure in which the upper and lower columns 104 are connected to each other vertically is generally used. Further, the both-side support column 104 is provided with a knee joint 105 on the lower side of the thigh, and the knee can be bent by the knee joint 105.

JP 2010-110365

Conventional long leg braces are structured to support each support part, which is sized according to the thickness of the patient's thighs, etc., firmly supported by the struts on both sides. It was not made to be shared by unspecified patients, except for patients who matched the size of each part by chance.
In addition, the conventional long leg brace is heavy and inconvenient to wear due to the structure of the metal struts on both sides, and there are problems such as the number of days until delivery for custom-made, satisfying users and rehabilitation staff Often not getting.
Furthermore, during walking training with a long leg brace attached to the affected side, the knee on the affected side with the buttocks of the foot floating in the air away from the ground may become so-called abnormal walking with the extension locked. In some cases, it was difficult to perform normal symmetric walking.

  In view of the above-described problems, the present invention has been created to solve the problems. The object of the present invention is to support each of the support parts that support the rear surface of the thigh, the front surface below the knee, and the rear surface of the lower leg. Is made of lightweight and reinforced plastic material, making it easy to manufacture, making it possible to support each support part with one side strut through weight reduction and strengthening, and further handling the attachment and detachment of the brace by using one side strut It becomes easy and can be worn without being affected by the width of the patient's lower limb because of the unilateral strut, and can be shared with unspecified patients. When the knee is grounded to the ground, the knee joint of the brace locks in the direction of further bending to prevent knee breakage, while when the knee joint bends in the extending direction, that is, in the extending direction, it becomes unlocked and free. When the heel portion is suspended in the air off the ground is to provide a pole piece length leg brace knee joint lock is released can be extended to bend the knee affected side freely.

  To achieve the above object, the present invention provides a thigh rear surface support portion that supports the rear surface of the thigh, a lower knee front support portion that supports the front surface below the knee, and a crus rear surface that supports the rear surface of the lower leg. A support part and a stirrup part on which the sole of the foot rides are provided, and the rear thigh support part, the front lower knee support part and the rear support part of the lower leg part are made of a lightweight / reinforced plastic material, and the lightweight / reinforced plastic material The lower side of the lower knee front support part is formed in a semi-spiral shape with a gap allowing the lateral side of the lower leg part to enter and exit from the side, and is integrated with the lower leg rear support part below, and the lower leg side part is One side strut is provided in the up and down direction on the opposite side of the side where the gap that can enter and exit from the side, the thigh rear surface support portion and the knee front support portion are connected vertically by the one side strut, and the lower end side of the one side strut Turn the foot joint of the stirrup Connect freely, and connect the above-mentioned one-side strut to the upper one-side strut that connects the thigh rear support part and the lower knee front support part up and down, and the lower one-side strut that connects the lower leg back support part and the stirrup part up and down A knee joint that bends and extends in the middle of the upper one column, a sensor that detects that the buttocks of the stirrup contacts the ground, and a knee joint that operates based on information from the sensor The knee joint actuating device is provided so that the knee joint can be freely extended and bent when the stirrup of the stirrup is not grounded, and the knee joint is disengaged when the stirrup of the stirrup is grounded. Is formed of means for preventing the knee joint from being bent in the knee folding direction and allowing the knee joint to freely move in the extending direction.

Here, as a preferred aspect of claim 1, in claim 2, the knee joint operating device includes a cylinder chamber and a piston rod that expands and contracts by a piston that slides in the cylinder chamber, and a tip portion of the piston rod has a knee joint. An extension hydraulic circuit and a bending hydraulic circuit are branched in the middle of a hydraulic circuit that is linked to an operating member to be fixed and released and communicates with the cylinder chambers on both sides of the piston. A check valve is provided that opens when the joint extends, and closes when the joint does not extend. The bending hydraulic circuit is provided with an open / close valve that opens when the stirrup of the stirrup is not grounded and closes the circuit when the ground is grounded. .
Further, as a preferred aspect of claim 1, in claim 3, the knee joint actuator includes a fan-shaped cylinder chamber and a fan-shaped vane and a vane that rotate while sliding in the cylinder chamber. An extension hydraulic circuit and a bending hydraulic circuit are provided in the middle of a hydraulic circuit communicating with the cylinder chambers on both sides of the vane with a circular rotation shaft provided integrally on a part of the circumference. The extension hydraulic circuit is provided with a check valve that opens when the knee joint is extended, and closes when the knee joint is not extended.The bending hydraulic circuit opens the same circuit when the buttocks of the stirrup is not grounded, and the same when the ground is grounded. An on-off valve is provided to close the circuit.
As a preferred aspect of claim 1, in claim 4, the sensor includes a movable bottom plate movably attached to the lower surface side of the stirrup portion, a rear end side of the movable bottom plate, and a flange portion of the stirrup portion. The lower end side is connected to the movable bottom plate, the upper end side is connected to the open / close valve of the knee joint operating device, and the operating line is inserted through the tube.
Further, as a preferred aspect of claim 1, in claim 5, the sensor includes a movable bottom plate movably attached to the lower surface side of the stirrup portion, a rear end side of the movable bottom plate, and a flange portion of the stirrup portion. A spring attached between, a detector that detects contact between the rear end of the movable bottom plate and the stirrup of the stirrup, a wire that transmits information from the detector as an electrical signal, and a wire that passes through the inside It consists of a tube.
Further, as a preferred aspect of the fifth aspect, in the sixth aspect, an electromagnetic solenoid for operating an on-off valve of a bending hydraulic circuit of the knee joint operating device is provided.

According to the unilateral strut-length lower limb orthosis according to the present invention comprising means for solving the problems, each support portion supporting the rear surface of the thigh, the front surface of the lower knee, and the rear surface of the lower leg is made of a lightweight / reinforced plastic material. It can be easily molded by applying heat, and it can be partially corrected by applying heat to the non-conforming part of the patient wearing the shape of each support part. Moreover, it is possible to connect and support the upper and lower support portions with one-side struts through weight reduction and reinforcement of the support portions. Furthermore, by using one side struts, the one side struts may be inside or outside the patient's lower limbs, and the thighs, knees, lower leg, etc. can be inserted and removed from the side where the one side struts are not provided. This makes it easy to handle the attachment / detachment of the brace.
In addition to this, when the heel of the affected foot with one-leg strut-length leg brace touches the ground, the knee joint of the brace locks in the direction of further bending to prevent knee bending, while the knee joint When the arm bends in the extending direction, that is, in the extending direction, it is in an unlocked free state, and when the heel of the foot floats away from the ground, the knee joint is unlocked so that the affected knee can be bent and extended freely. During gait training, the affected side of the knee with the buttocks of the foot floating away from the ground is prevented from stretching abnormally while the extension side is locked, and in that state, the affected side of the knee is bent and stretched freely. On the other hand, when the affected knee is in contact with the heel of the foot on the ground, the knee is locked in the bending direction to prevent knee bending, while the knee joint can be freely bent in the extending direction, Allows normal walking It is intended to achieve the very new benefit Naru effects.

It is a right view for the outside strut left lower limbs of the one side strut length lower limb orthosis equipped with the knee joint operating device showing the form for carrying out the present invention. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a front view for the outer strut left lower limbs of the one side strut length lower limb orthosis equipped with the knee joint actuator which shows the form for implementing this invention. It is a left side view for the outside strut left lower limb of the one side strut length lower limb orthosis equipped with the knee joint operating device showing the form for carrying out the present invention. It is a rear view for the outside strut left lower limbs of the unilateral strut length lower limb orthosis equipped with the knee joint operating device showing the embodiment for carrying out the present invention. (A) is a partially cutaway front view of a knee joint operating device to be attached to a one-leg post-length lower limb orthosis showing a mode for carrying out the present invention, and (B) is a partially cutout right side surface of the knee joint operating device. FIG. It is operation | movement explanatory drawing of the knee joint operation apparatus at the time of extension of the knee joint when the buttocks of the stirrup which shows the form for implementing this invention is earth | grounding. It is operation | movement explanatory drawing of the knee joint operation apparatus at the time of the bending of the knee joint when the buttocks of the stirrup which shows the form for implementing this invention is not grounding. It is a right side view for the outer strut left lower limb of the one-leg strut long leg brace equipped with the knee joint actuator with electromagnetic solenoid showing the form for carrying out the present invention. It is a right side surface for outer strut left lower limbs of a one-side strut long leg brace equipped with a rotation type knee joint actuating device showing a mode for carrying out the present invention. (A) is a front sectional view of a rotary type knee joint operating device showing a mode for carrying out the present invention, a front sectional view of the rotary type knee joint operating device, and (B) is a rotary type knee joint operating device. The left side sectional view of an actuator is (C), and it is an AA arrow sectional view of the figure (A). (A) is an operation explanatory view of a rotation type knee joint actuator when the knee joint is extended when the buttocks of the stirrup shows a form for carrying out the invention. (B) It is operation | movement explanatory drawing of the rotation type knee joint actuator at the time of the bending of the knee joint when a buttocks is not grounding. It is a front view of the conventional both-legs long leg brace.

  Hereinafter, the present invention will be described more specifically based on embodiments for carrying out the invention described in the drawings.

  In the figure, the one-leg post long leg orthosis 1 is for left leg mounting, and the thigh rear support 2, the knee front support 3, and the rear rear support 4 are made of lightweight and reinforced plastic material. It has a stirrup part 5 and a single-sided strut 6 that connects them up and down. The unilateral strut-length lower limb orthosis 1 is arranged in the order of the rear thigh support part 2, the lower knee front support part 3, the lower leg rear support part 4, and the stirrup part 5 from the upper side to the lower side. When the unilateral strut length lower limb orthosis 1 is used for wearing the right leg, the left and right are symmetrical.

  As the lightweight / reinforced plastic material, for example, thermoplastic carbon fiber reinforced plastic (thermoplastic CFRP) is used. Thermoplastic CFRP is lighter and lighter than duralumin and is stronger than stainless steel. Further, since it is thermoplastic, it has a feature that its shape can be freely changed by applying heat.

  Also, when the thigh rear support part 2, the lower knee front support part 3 and the crus rear support part 4 are connected in the vertical direction, they are light and strong, so there is no need to support them on both side struts. 6 can be supported. Furthermore, the entire brace is lighter and easy to handle, including attaching and detaching braces.

  The thigh rear surface support portion 2 is a member that supports the rear surface of the thigh, and is formed by processing a thin, lightweight, reinforced plastic material into a concave curved shape so as to engage with the shape of the rear surface of the thigh. Yes.

  The thigh rear surface support portion 2 is provided with a thigh front surface holding belt 21 that holds the front side of the thigh supported by the rear surface. The thigh is firmly fixed by the thigh front support belt 21 so as not to move to the thigh rear support 2. One end of the thigh front holding belt 21 is fixed to the thigh rear support 2 with, for example, screws.

  Further, the front surface of the thigh front surface holding belt 21 is formed of, for example, a hook-shaped surface fastener so that the thigh front surface holding belt 21 wound around the front surface side of the thigh can be held in that state. ing. The rear surface is formed of a loop-shaped hook-and-loop fastener that hooks the hook-shaped hook-and-loop fastener.

  A pad 22 having a cushioning property is attached to the inner surface side of the thigh rear surface support portion 2 that touches the rear surface of the thigh. The thigh rear support part 2 is made of a lightweight and reinforced plastic material, and the back of the thigh may become slightly painful if it directly hits it, so the cushioned pad 22 serves to relieve this. Fulfill.

  The below-knee front support part 3 is a member that supports the below-knee front surface, and is formed by processing a thin lightweight and reinforced plastic material into a concave curved surface so as to engage with the shape of the below-knee front surface.

  A pad 31 having a cushioning property is attached to the inner surface side of the front lower knee support portion 3 that is touched by the front lower knee. The lower knee front support part 3 is made of a light weight / reinforced plastic material, and when the front lower knee directly hits this, it may become a little painful, so the pad 31 with cushioning functions to relieve this.

  The crus rear surface support part 4 is a member that supports the rear surface of the crus, and is formed by processing a thin light weight / reinforced plastic material into a concave curved shape so as to engage with the shape of the rear surface of the crus. Yes.

  A crus front support belt 41 that holds the front side of the crus supported by the rear surface is attached to the crus rear support part 4 as necessary. The lower leg is firmly fixed to the lower leg front holding belt 41 by the lower leg front holding belt 41 so as not to move. One end of the crus front support belt 41 is fixed to the crus rear support 4 with screws or the like.

  In addition, the front surface of the crus front holding belt 41 is formed with, for example, a hook-shaped hook-and-loop fastener 41a so that the crus front holding belt 41 wound around the front side of the crus can be held in that state. Has been. The rear surface is formed by a loop-shaped surface fastener 41b on which a hook-shaped surface fastener 41a is hooked.

  A pad 42 having a cushioning property is attached to the inner surface side of the lower leg support part 4 which is in contact with the rear face of the lower leg. The crus back support part 4 is made of a lightweight and reinforced plastic material, and the back of the crus may be slightly painful if it hits it directly, so the cushioned pad 42 serves to relieve this. Fulfill.

  The lower side of the lower knee front support part 3 made of a lightweight / reinforced plastic material is formed in a semi-spiral shape with a gap 11 through which the side of the lower leg can enter and exit from the side, and the lower leg rear support part 4 below the lower leg. And integrated. This semi-helical shape means that the lower crus rear surface support part 4 on the lower knee front surface support part 3 is at the opposite side position, that is, the position rotated approximately 180 degrees.

  The lower knee front support part 3 and the lower leg rear support part 4 on the lower side are integrally formed without a boundary by a continuous body 12 made of a lightweight, reinforced plastic material bent and formed in a semi-spiral shape. ing. The upper side of the continuous body 12 made of this lightweight and reinforced plastic material is connected to the lower knee front support part 3, and the lower side is connected to the lower leg rear support part 4. That is, a lightweight / reinforced plastic material is bent into a semi-spiral shape, and the upper side thereof becomes the lower knee front support part 3 and the lower side thereof becomes the lower leg rear support part 4.

  The stirrup portion 5 is a member that supports the sole of the foot by placing the sole of the foot thereon, and the side surface of one side of the stirrup portion 5 is configured by a plate-like member. The stirrup part 5 has the same side as the gap 11 where the side of the lower leg part can enter and exit from the side, and the foot is put in from the same side. During walking, the stirrup 5 is rotatably connected to the lower end side of the one-side column 6 so that it can follow the movement of the ankle joint.

  A foot holding belt 51 is attached to the stirrup 5 to hold the placed foot. The foot placed on the stirrup 5 is firmly fixed to the stirrup 5 by the foot retaining belt 51 so as not to move. The stirrup portion 5 is provided with a sensor 9 which will be described later. When the collar portion 52 of the stirrup portion 5 comes into contact with the ground or the floor, the sensor 9 detects it.

  The one-side column 6 connects the thigh rear surface support portion 2 and the below-knee front surface support portion 3 in the vertical direction. In addition, a foot joint 62a of the stirrup portion 5 described later is rotatably connected to the lower end side of the one-side column 6. As described above, the one-side strut 6 includes the rear thigh support part 2, the lower knee front support part 3 and the lower leg rear support part 4 that are integrated below and vertically through the continuous body 12, and stirrups. It fulfills the function of connecting the part 5 up and down. The one-side strut 6 is provided in the up-down direction on the side opposite to the side where the gap 11 is formed so that the side of the lower leg can enter and exit from the side.

  The one-side strut 6 in the drawing is an upper one-side strut 61 that connects the thigh rear surface support portion 2 and the lower knee front support portion 3 in the vertical direction, and a lower portion that connects the lower leg rear surface support portion 4 and the stirrup portion 5 in the vertical direction. Although it is comprised from the one-side support | pillar 62, you may provide by connecting up and down by the integrated thing.

  The upper half column 61 is inserted upward from the lower side of the thigh rear support portion 2 into the inside thereof and fixed by screws 61a. The lower side of the fork upper side support column 61 is connected to the inner side surface of the front lower knee support portion 3 by a screw 61a. A plurality of screw holes 61b are formed in the plate-like member of the upper one column 61 in the vertical direction. By changing the positions of the screw holes 61b formed above and below, the thigh rear surface support part 2 and The vertical distance from the lower knee front support part 3 can be adjusted respectively.

A knee joint 63 is provided in the middle of the upper one-side column 61 that connects the thigh rear support portion 2 and the lower knee front support portion 3 in the vertical direction. The knee joint 63 is configured to bend the one-side column 6 in the front-rear direction. A lever-like actuating member 63 a is attached to the knee joint 63.

  The upper side of the lower one-side column 62 is inserted upward into the inside from the lower side of the lower leg support portion 4 and is fixed by adjusting screws. In the lower half column 62, a plurality of screw holes (not shown) are formed in the vertical direction in the inserted plate-like member. By sliding the lower one-side column 62 up and down and changing the positions of screw holes (not shown) formed above and below, it is possible to adjust the vertical distance between the lower leg support portion 4 and the stirrup portion 5. It has become.

  A bearing hole for rotatably connecting the stirrup portion 5 is formed on the lower end side of the lower one-side column 62. A foot joint 62 a is provided on the upper portion of the L-shaped stirrup 5. Thereby, the stirrup part 5 is rotatably connected to the lower end side of the lower one-side column 62 via the foot joint 62a.

  The knee joint actuating devices 7 and 8 make the knee joint 63 freely movable in any of the extending and bending directions when the buttocks 52 of the stirrup 5 are not grounded based on information from the sensor 9 described later. This is a device that prevents the knee joint 63 from bending in the direction of knee folding when the heel part 52 of the part 5 is grounded, thereby allowing the knee joint 63 to freely move in the extension direction. The knee joint actuating devices 7 and 8 are adapted to actuate based on information from a sensor that detects that the buttocks 52 of the stirrup 5 are in contact with the ground.

  The knee joint actuating devices 7 and 8 include, for example, a linear reciprocating structure attached to the lower side of the knee joint 63 as shown in FIGS. 1 to 8 and a knee joint 63 as shown in FIGS. It is conceivable that it has a pivoting structure that is directly attached to the head.

  Among these, the knee joint actuator 7 having a rectilinear reciprocating structure as shown in FIGS. 1 to 8 is attached to the outer surface of the below-knee front support portion 3 on the lower side of the knee joint 63. The knee joint operating device 7 includes a cylinder chamber 71 and a piston rod 73 that expands and contracts by a piston 72 that slides in the cylinder chamber 71. An oil replenishing tank 71a is provided inside. The tip of the piston rod 73 is formed in a ring shape, for example.

  The distal end portion of the piston rod 73 is linked to an operating member 63a connected to the knee joint 63 by a connecting piece 73a such as a bolt. For example, a connecting piece 73 a such as a bolt is connected at one end to a ring-shaped hole at the tip of the piston rod 73, and the other end is inserted and connected to a bolt hole formed in the operating member 63 a of the knee joint 63. .

  When the piston rod 73 freely expands and contracts, the knee joint 63 that is interlocked and connected through the connecting piece 73a and the actuating member 63a is also free to extend and bend, and the affected leg can also be freely extended and bent. On the other hand, when the piston rod 73 is fixed and cannot be freely expanded and contracted, the extension / bending of the knee joint 63 is fixed through the connecting piece 73a and the operating member 63a, and the affected leg may be freely extended or bent. become unable.

  The knee joint actuator 7 is provided with a hydraulic circuit 74 that communicates with the cylinder chambers 71 on both sides of the piston 72. The oil in the cylinder chambers 71 on both sides of the piston 72 flows through the hydraulic circuit 74 and moves into the cylinder chamber 71 on the opposite side when the piston 72 moves. In the middle of the hydraulic circuit 74, an extension hydraulic circuit 74a and a bending hydraulic circuit 74b are branched.

  Of these, the extension hydraulic circuit 74a is allowed to open and flow when the knee joint 63 is extended, that is, in the direction of extending the knee, and closed and flows when it is not extended, that is, in the direction of bending the knee. A check valve 75 is provided to prevent this.

  Thereby, for example, when the knee is extended in the direction in which the knee joint 63 is extended, when the actuating member 63a rotates in that direction, the piston rod 73 interlocked and connected through the connecting piece 73a tends to move in the extending direction.

  In this case, for example, in FIG. 6, the piston 72 moves upward, and the oil in the cylinder chamber 71 above the piston 72 flows through the extension hydraulic circuit 74a. At this time, the check valve 75 opens and the oil flows. Therefore, the oil in the cylinder chamber 71 on the upper side of the piston 72 can flow into the cylinder chamber 71 on the lower side of the piston 72 through the hydraulic circuit 74 and the extension hydraulic circuit 74a. The inside of the chamber 71 can be moved upward. Thereby, the knee joint 63 can be freely extended without resistance.

  On the other hand, when the knee is bent in the non-extending direction, that is, the direction in which the knee joint 63 is bent, the piston rod 73 that is interlocked and connected through the connecting piece 73a is contracted in order for the operating member 63a to rotate in that direction. Try to move in the direction.

  In this case, for example, in FIG. 7, the piston 72 moves downward, the oil in the cylinder chamber 71 below the piston 72 flows through the extension hydraulic circuit 74 a, and the cylinder chamber 71 above the piston 72. Try to move in.

  However, since the check valve 75 of the extension hydraulic circuit 74 a is closed to prevent oil from flowing, the oil in the cylinder chamber 71 below the piston 72 flows through the hydraulic circuit 74 and the extension hydraulic circuit 74 a to The piston 72 cannot move because it cannot flow into the upper cylinder chamber 71.

  That is, since the oil in the cylinder chamber 71 below the piston 72 cannot flow through the hydraulic circuit 74, the knee joint 63 cannot be bent in the bending direction unless the bending hydraulic circuit 74b is open.

  On the other hand, the bending hydraulic circuit 74b allows the oil to flow by opening the circuit 74b when the collar 52 of the stirrup 5 is not grounded, that is, when the collar 52 is floating away from the ground. An open / close valve 76 is provided to prevent the oil from flowing when the ground is grounded, that is, when the flange 52 is grounded.

  Accordingly, when the buttock 52 of the stirrup 5 is not grounded, that is, when the buttock 52 is floating in the air away from the ground, for example, when the knee is bent in the non-extending direction, that is, the direction in which the knee joint 63 is bent. In order for the operating member 63a to rotate in that direction, the piston rod 73 that is interlocked and connected through the connecting piece 73a tends to move in the contracting direction.

  In this case, for example, in FIG. 7, the piston 72 moves downward, and the oil in the cylinder chamber 71 below the piston 72 flows through the bending hydraulic circuit 74 b, and the cylinder chamber 71 above the piston 72. Try to move in.

  At this time, the on-off valve 76 of the bending hydraulic circuit 74b opens to allow oil to flow, so that the oil in the cylinder chamber 71 below the piston 72 flows through the hydraulic circuit 74 and the bending hydraulic circuit 74b to It can flow into the upper cylinder chamber 71, and the piston 72 can move downward in the cylinder chamber 71 without resistance. Thereby, the knee joint 63 can be freely bent without resistance.

  Thus, when the collar portion 52 of the stirrup portion 5 is not grounded, that is, when the collar portion 52 is away from the ground and floating in the air, the on-off valve 76 is open. The oil in the cylinder chamber 71 flows freely through the bending hydraulic circuit 74b in which the hydraulic circuit 74 and the on-off valve 76 are open, and can freely move to the opposite side, so that the knee joint 63 can be freely bent and extended. .

  When the flange 52 of the stirrup 5 is in contact with the ground, that is, when the flange 52 is in contact with the ground, the on-off valve 76 of the bending hydraulic circuit 74b is closed. The oil in the chamber 71 cannot move through the hydraulic circuit 74 and the bending hydraulic circuit 74b, and the piston 72 cannot move up and down. That is, the knee joint 63 cannot be bent in the bending direction.

  Further, as shown in FIG. 8, an electromagnetic solenoid 77 for operating the knee joint operating device 7 may be used. The electromagnetic solenoid 77 is attached to the outer surface of the lower knee front support portion 3 on the lower side of the knee joint actuator 7. The knee joint actuating device 7 operates by detecting whether or not the sensor 9 described later detects whether or not the collar portion 52 of the stirrup portion 5 is grounded, and is used in the case of a so-called electric type as means for transmitting the information.

  That is, when the collar portion 52 of the stirrup portion 5 is grounded, the electromagnetic solenoid 77 is activated by energization. When energized, the actuating rod 77a of the electromagnetic solenoid 77 moves toward the knee joint actuator 7, pushes up the on-off valve 76 in the knee joint actuator 7, and closes the on-off valve 76.

  Further, the knee joint operating device 8 having a rotation type structure as shown in FIGS. 9 to 11 has a disk-like outer shape and is directly attached to the knee joint 63. The knee joint actuator 8 includes a fan-shaped cylinder chamber 81 and a fan-shaped vane 82 that rotates while sliding in the cylinder chamber 81. The fan-shaped vane 82 is a linear cylinder and performs the same function as a piston that reciprocates in a linear direction.

  A circular rotary shaft 83 is attached to the central portion of the knee joint actuator 8, and the fan-shaped vane 82 is provided integrally with a part of the circumference of the circular rotary shaft 83. The circular rotary shaft 83 is integrally rotated. Further, the vane 82 is provided with a partition plate 82 a for stopping the rotating vane 82 so as to be able to protrude and retract toward the circumferential side surface of the cylinder chamber 81. The partition plate 82a protrudes and contacts the side peripheral surface of the cylinder chamber 81 by the high pressure supply of hydraulic pressure, and stops the rotating vane 82. An oil replenishment tank (not shown) is provided inside.

  The rotary knee joint actuator 8 is directly attached to the knee joint 63. That is, a part of the circular rotating shaft 83 protrudes outside the device 8, and one upper one-side column 61 connected to the external protruding surface of the circular rotating shaft 83 by a knee joint 63 is freely screwed. Etc., and the other upper one-side column 61 that is pivotally connected to the outer surface of the knee joint actuator 8 on the outer peripheral side of the circular rotary shaft 83 by the knee joint 63 is integrated with a screw or the like. It is fixed.

  When the vane 82 provided integrally with the circumference of the circular rotation shaft 83 freely rotates in the fan-shaped cylinder chamber 81, the circular rotation shaft 83 is relative to the main body of the knee joint actuator 8. Therefore, the knee joint 63 to which the knee joint actuating device 8 is directly attached can also freely bend and bend, and the affected leg can be freely stretched and bent. On the other hand, when the vane 82 is fixed and cannot rotate freely, the extension / bending of the knee joint 63 to which the knee joint actuating device 8 is directly attached is fixed, and the affected leg is also freely stretched or bent. Can not do.

  The knee joint operating device 8 is provided with a hydraulic circuit 84 that communicates with the fan-shaped cylinder chambers 81 on both sides of the fan-shaped vane 82. The oil in the cylinder chambers 81 on both sides of the vane 82 flows through the hydraulic circuit 84 and moves into the cylinder chamber 81 on the opposite side when the vane 82 rotates. An extension hydraulic circuit 84a and a bending hydraulic circuit 84b are branched in the middle of the hydraulic circuit 84.

  Of these, the extension hydraulic circuit 84a is allowed to open and flow when the knee joint 63 is extended, that is, in the direction of extending the knee, and is closed and flows when it is not extended, that is, in the direction of bending the knee. A check valve 85 is provided to prevent this.

  Thus, for example, when the knee is extended in the direction in which the knee joint 63 is extended, the vane 82 of the knee joint actuator 8 that is directly attached to the knee joint 63 is, in this case, for example, in FIG. It will rotate clockwise.

  The oil in the cylinder chamber 81 on the left side (upper side) of the rotating vane 82 flows through the extension hydraulic circuit 84a. At this time, the check valve 85 is opened to allow the oil to flow, so the left side of the rotating vane 82 is left. Oil in the (upper) cylinder chamber 81 can flow into the cylinder chamber 81 on the right side (lower side) of the vane 82 that rotates by flowing through the hydraulic circuit 84 and the extension hydraulic circuit 84a. It can move in the clockwise direction in 71. Thereby, the knee joint 63 can be freely extended without resistance.

  On the contrary, when the knee is bent in the non-extending direction, that is, the direction in which the knee joint 63 is bent, the vane 82 of the knee joint operating device 8 directly attached to the knee joint 63 is, for example, FIG. In B), the vane 82 rotates counterclockwise (downward), and the oil in the cylinder chamber 81 on the right side (lower side) of the rotating vane 82 flows through the extension hydraulic circuit 84a and rotates. An attempt is made to move into the cylinder chamber 81 on the left side (upper side) of the moving vane 82.

  However, since the check valve 85 of the extension hydraulic circuit 84a is closed to prevent oil from flowing, the oil in the cylinder chamber 81 on the right side (lower side) of the rotating vane 82 is supplied to the hydraulic circuit 84 and the extension hydraulic circuit 84a. The vane 82 cannot move because it cannot flow into the cylinder chamber 81 on the left side (upper side) of the vane 82 that flows and rotates.

  In other words, the oil in the cylinder chamber 81 on the right side (lower side) of the vane 82 cannot flow through the hydraulic circuit 84. Therefore, the knee joint 63 cannot be bent in the bending direction unless the bending hydraulic circuit 84b is open. is there.

  On the other hand, the bending hydraulic circuit 84b allows the oil to flow by opening the circuit 84b when the collar 52 of the stirrup 5 is not grounded, that is, when the collar 52 is floating away from the ground. An open / close valve 86 is provided to close and prevent oil from flowing when the ground is grounded, that is, when the flange 52 is grounded.

  Accordingly, when the buttock 52 of the stirrup 5 is not grounded, that is, when the buttock 52 is floating in the air away from the ground, for example, when the knee is bent in the non-extending direction, that is, the direction in which the knee joint 63 is bent. In order for the circular rotation shaft 83 of the knee joint actuator 8 to rotate in that direction, the vane 82 provided integrally with the circumference of the circular rotation shaft 83 tries to rotate in the bending direction. .

  In this case, for example, in FIG. 11B, the vane 82 moves counterclockwise, and the oil in the cylinder chamber 81 on the right side (lower side) of the rotating vane 82 is bent hydraulic circuit 84b. To move into the cylinder chamber 81 on the left side (upper side) of the rotating vane 82.

  At this time, the on-off valve 86 of the bending hydraulic circuit 84b is opened to allow oil to flow, so that the oil in the cylinder chamber 81 on the right side (lower side) of the rotating vane 82 is supplied to the hydraulic circuit 84 and the bending hydraulic circuit 84b. Since the vane 82 can flow into the cylinder chamber 81 on the left side (upper side) of the rotating vane 82, the vane 82 can move in the counterclockwise direction in the cylinder chamber 81 without resistance. Thereby, the knee joint 63 can be freely bent without resistance.

  In this way, when the flange 52 of the stirrup 5 is not grounded, that is, when the flange 52 is floating in the air away from the ground, the on-off valve 86 is open, so the cylinders on both sides of the vane 82 are sandwiched. The oil in the chamber 81 flows freely through the bending hydraulic circuit 84b in which the hydraulic circuit 84 and the on-off valve 86 are open and can freely move to the opposite side, so that the knee joint 63 can be flexed and extended freely.

  When the collar portion 52 of the stirrup portion 5 is grounded, that is, when the collar portion 52 is grounded, the on-off valve 86 of the bending hydraulic circuit 84b is closed, so that the cylinder chambers on both sides of the vane 82 are sandwiched. Since the oil in 81 cannot move through the hydraulic circuit 84 and the bending hydraulic circuit 84b, the vane 82 cannot move in either the clockwise direction or the counterclockwise direction. Therefore, the vane 82 is integrated with its circumference. The circular rotation shaft 83 provided in the can not rotate. That is, the knee joint 63 cannot be bent in the bending direction.

  The sensor 9 detects that the collar portion 52 of the stirrup portion 5 is in contact with the ground or the floor, and transmits the detection information to the knee joint actuating devices 7 and 8. The sensor 9 has so-called mechanical type and electric type as information transmission means. In the case of the electric type, the signal is transmitted to the knee joint actuator 7 through the electromagnetic solenoid 77.

  Here, the fact that the buttocks 52 of the stirrup 5 are in contact with the ground or the floor means a state in which a part of the weight acts on the buttocks 52 and is supported by the ground or the floor. It is not included that the butt portion 52 simply touches the ground or floor.

  The sensor 9 has a movable bottom plate 91 movably attached to the lower surface side of the stirrup portion 5, and a spring 94 attached between the rear end side of the movable bottom plate 91 and the flange portion 52 of the stirrup portion 5. When the sensor 9 is of a so-called mechanical type, an operating line 92 having a lower end connected to the movable bottom plate 91 and an upper end connected to the on / off valve 76 of the knee joint operating device 7 or the on / off valve 86 of the knee joint operating device 8. In addition, an insertion tube 93 through which the operation line 92 is inserted is included.

  In the case where the sensor 9 is a so-called electric type, the electric wire 95 that transmits electricity is used in place of the operation line 92 among the above, and the contact between the rear end portion of the movable bottom plate 91 and the flange portion 52 of the stirrup portion 5 is used. A detector 96 is used to detect. The lower end of the electric wire 95 is connected to the detector 96, the electric wire 95 is inserted through the insertion tube 93, and the upper end is connected to the electromagnetic solenoid 77. The detector 96 is attached to the lower surface of the collar portion 52 of the stirrup portion 5.

  The movable bottom plate 91 is attached to the lower surface side of the stirrup 5 which is the side that touches the ground. The movable bottom plate 91 has a tip attached to the toe side on the lower surface side of the stirrup portion 5 by a hinge 91a, and the movable bottom plate 91 is configured to move up and down with the hinge 91a at the tip as a fulcrum. ing. By moving the rear end portion of the movable bottom plate 91 relatively toward the flange portion 52 side of the stirrup portion 5, the ground contact of the flange portion 52 of the stirrup portion 5 is detected.

  A lower end of an operating line 92 made of a so-called mechanical wire cable that transmits information is connected to the rear end of the movable bottom plate 91. The operating line 92 extends upward and passes through the inside of the insertion tube 93 extending upward, and the upper end of the operating line 92 is the on-off valve 76 of the knee joint operating device 7 or the knee joint operating device 8. The on-off valve 86 is connected.

  That is, when the collar portion 52 of the stirrup portion 5 is grounded, the operating line 92 moves relatively upward as a whole, and the upper end of the operating line 92 is the open / close valve 76 of the bending hydraulic circuit 74b of the knee joint actuator 7 or The on-off valve 86 of the bending hydraulic circuit 84b of the knee joint actuator 8 is pushed up to close the on-off valve 76 or the on-off valve 86, whereby the bending hydraulic circuit 74b of the knee joint actuator 7 or the bending hydraulic pressure of the knee joint actuator 8 is closed. Oil does not flow through circuit 84b.

  The insertion tube 93 through which the operation line 92 passes is located at the lower end side near the buttock 52 of the stirrup portion 5, extends upward along the outer surface of the crus rear surface support portion 4, and further on the upper side thereof. It extends upward along the outer surface of the lower knee front support part 3. The upper end of the actuation line 92 is connected to the lower part of the knee joint actuator 7 attached to the upper part of the outer surface of the lower knee front support part 3 or the lower part of the knee joint actuator 8 attached directly to the knee joint 63.

A spring 94 is mounted between the rear end side of the movable bottom plate 91 and the flange portion 52 of the stirrup portion 5. For example, a coil spring is used as the spring 94. The spring 94 acts to open the rear end side of the movable bottom plate 91 and the flange portion 52 of the stirrup portion 5 up and down. That is, when the collar portion 52 of the stirrup portion 5 is floating in the air, the rear end side of the movable bottom plate 91 is pushed downward, the lower end of the operating line 92 is moved downward, and the operating line 92 The on-off valve 76 of the bending hydraulic circuit 74b of the knee joint actuator 7 to which the upper end is connected or the on-off valve 86 of the bending hydraulic circuit 84b of the knee joint actuator 8 is pulled back downward to open the on-off valves 76, 86. To work. In the drawing, the lower end side of the operating wire 92 is attached by being inserted through a coil spring.

Next, a method for using the unilateral strut length lower limb orthosis based on the configuration of the embodiment for carrying out the invention will be described below.

  In this way, after each part of the thigh rear support part 2, the lower knee front support part 3 and the lower leg rear support part 4 of the unilateral strut length lower leg orthosis 1 is molded by heat, the long leg support apparatus is completed. According to the size of the wearer, the vertical distance between the thigh rear support portion 2 and the lower knee front support portion 3 is adjusted. By changing the position of a plurality of screw holes 61b formed in the vertical direction above and below the knee joint 63 of the upper one column 61, and inserting the screws 61a into the screw holes 61b at the changed positions, the rear surface of the thigh The vertical distance between the support part 2 and the front lower knee support part 3 can be adjusted.

  Similarly, the vertical distance between the crus rear support 4 and the stirrup 5 is adjusted. By changing the position of a plurality of screw holes (not shown) formed in the vertical direction on the lower one-side support column 62 inserted from the lower part of the lower leg support portion 4, and inserting and tightening an adjusting screw into the screw hole at the changed position The vertical distance between the crus rear surface support part 4 and the stirrup part 5 can be adjusted.

  After adapting to the size of the patient wearing the unilateral strut length lower limb orthosis 1, the operating member 63 a of the knee joint 63 provided on the upper unilateral strut 61 of the unilateral strut length lower limb orthosis 1 is moved to fix the knee joint 63. Is released, the knee joint 63 is bent, the person's lower leg part is put into the lower leg support part 4 of the lower leg brace 1, and the lower knee part is put into the lower knee front support part 3.

  On the side opposite to the side where the one-side strut 6 is provided, there is a gap 11 between the lower knee front support part 3 and the lower leg rear support part 4 through which the side of the lower leg can enter and exit from the side, Using this gap 11, the person's lower knee and lower leg are put into the lower knee front support part 3 and the lower leg rear support part 4.

  Then, when the knee is extended, the front surface of the person's lower knee is in close contact with the inner pad 31 of the lower knee front support portion 3, and the rear surface of the lower leg portion is a pad 42 on the inner surface side of the lower leg rear support portion 4. In close contact. Furthermore, the rear surface of the person's thigh closely contacts the pad 22 on the inner surface side of the thigh rear surface support portion 2.

  After the rear surface of the lower leg part is brought into close contact with the pad 42 on the inner surface side of the lower leg support part 4, the lower leg front holding belt 41 is tightly wound around the front side of the lower leg part. The wound crus front holding belt 41 is formed with a hook-and-loop fastener 41a on the front surface thereof, and a loop-shaped hook-and-loop fastener that hooks the hook-shaped hook-and-loop fastener 41a on the rear side following the tip. Since 41b is formed, the front end side of the crus front support belt 41 can be firmly fixed to the subsequent rear surface side by bringing the front surface fastener 41a into close contact with the surface fastener 41b. The crus front support belt 41 secures the crus to the pad 42 on the inner surface side of the crus rear support 4.

  Similarly, after the rear surface of the thigh is brought into close contact with the pad 22 on the inner surface side of the thigh rear surface support portion 2, the thigh front surface holding belt 21 is tightly wound around the front surface side of the thigh. The wound front thigh front holding belt 21 is formed with a hook-and-loop fastener on the tip side surface, and a loop-like hook-and-loop fastener that hooks a hook-like hook-and-loop fastener on the rear side following the tip side. Therefore, the front end side of the thigh front surface holding belt 21 can be firmly fixed to the subsequent rear surface side by closely attaching the front surface fastener to the loop surface fastener. The thigh front holding belt 21 secures the thigh to the pad 22 on the inner surface side of the thigh rear support 2.

Then, the use state in the walking training after mounting | wearing a patient's lower limb to the one side support | pillar length lower limb orthosis 1 is demonstrated.
In walking training, the buttocks 52 of the stirrup 5 are grounded to the ground or floor. This grounding is accompanied by weight shift. When the collar part 52 of the stirrup part 5 is grounded, the stirrup part 5 sinks downward on the collar part 52 side with the hinge 91a of the movable bottom plate 91 as a fulcrum. The unilateral strut-length lower limb orthosis 1 moves downward as a whole by the amount of sinking.

  In the case where the sensor 9 is a so-called mechanical type, the length of the operation line 92 of the sensor 9 is constant, so that the upper end of the operation line 92 is relatively moved upward, and the operation line 92 The upper end of 92 pushes up the on-off valve 76 of the bending hydraulic circuit 74b of the knee joint operating device 7 or the on-off valve 86 of the bending hydraulic circuit 84b of the knee joint operating device 8 to which the upper / lower valve 92 is connected. Close. This prevents oil from flowing through the bending hydraulic circuit 74b of the knee joint actuator 7 or the bending hydraulic circuit 84b of the knee joint actuator 8.

  Further, when the sensor 9 is a so-called electric type, the detector 96 attached to the flange portion 52 of the stirrup portion 5 is brought into an energized state with the movable bottom plate 91 coming into contact therewith. The electromagnetic solenoid 77 is actuated by the solenoid 77 to actuate the actuating lever 77a, and the actuating actuating rod 77a pushes up the on-off valve 76 of the bending hydraulic circuit 74b of the knee joint actuating device 7 to close the on-off valve 76. This prevents oil from flowing through the bending hydraulic circuit 74b of the knee joint actuator 7.

  As a result, when the collar portion 52 of the stirrup portion 5 is grounded, the knee joint 63 is prevented from turning in the bending direction, so that knee bending is prevented.

  In this case, when the knee joint 63 is rotated in the extending direction and the knee is extended while the collar portion 52 of the stirrup portion 5 is in contact with the ground, the oil on one side in the cylinder chamber 71 of the knee joint actuator 7 is Since the check valve 74 of the extension hydraulic circuit 74a is opened, similarly, the check valve 84 of the extension hydraulic circuit 84a is opened for the oil on one side in the cylinder chamber 81 of the knee joint actuator 8, so that the cylinder chamber 71 on the opposite side is opened. , 81 flows without resistance, and the knee joint 63 can be rotated in the extending direction to extend the knee.

  On the other hand, the collar portion 52 of the stirrup portion 5 is in a non-grounded state, that is, the collar portion 52 is floating in the air, the weight does not move to the collar portion 52, and the movable bottom plate 91 simply touches the ground or floor surface. In this case, when the sensor 9 is a so-called mechanical type, the movable bottom plate 91 is pressed downward by the spring 94, and the rear end side of the movable bottom plate 91 and the flange portion 52 are opened up and down. Is pulled downward by the movable bottom plate 91.

  The operation line 92 pulled downward lowers the opening / closing valve 76 of the bending hydraulic circuit 74b of the knee joint actuator 7 or the opening / closing valve 86 of the bending hydraulic circuit 84b of the knee joint actuator 8 to which the upper end is connected. The valve 76 or the on-off valve 86 is opened. As a result, the oil flows through the bending hydraulic circuit 74b of the knee joint actuator 7 or the bending hydraulic circuit 84b of the knee joint actuator 8.

  Further, when the sensor 9 is a so-called electric type, the detector 96 attached to the flange portion 52 of the stirrup portion 5 is in a non-energized state with the movable bottom plate 91 separated, so that the electric signal is electromagnetically transmitted through the electric wire 95. The electromagnetic solenoid 77 does not operate the operating rod 77a without being transmitted to the solenoid 77. Since the operating rod 77a does not operate, the on-off valve 76 of the bending hydraulic circuit 74b of the knee joint operating device 7 is pushed down by the action of a spring attached thereto to open the on-off valve 76. As a result, the oil flows through the bending hydraulic circuit 74 b of the knee joint actuator 7.

  Thereby, when the collar part 52 of the stirrup part 5 will be in a non-grounding state, the knee joint 63 can be rotated in the bending direction, and the knee can be bent freely. When the knee is bent in the direction of extending the knee, the check valve 75 of the extension hydraulic circuit 74a of the knee joint actuator 7 and the check valve 85 of the extension hydraulic circuit 84a of the knee joint actuator 8 are opened. So you can stretch your knees freely.

  In this way, when the weight is applied to the heel, knee bending is prevented, and when it is desired to extend the knee, the knee joint 63 always rotates in the extending direction, so that the heel of the foot is separated from the ground during walking training. In this state, the patient's knee that is floating in the air remains locked in a stretched state and prevents so-called abnormal walking.In this state, the patient's knee can be bent and extended freely, while the patient's knee is placed on the ground with the buttocks of the foot on the ground. When touching the ground, the knee is locked in the bending direction to prevent knee bending, while the knee joint can be freely bent in the direction to extend the knee, allowing normal walking of the left and right subjects, and walking training for rehabilitation. Is possible.

  The present invention is not limited to the embodiment for carrying out the invention, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 One side support | pillar length lower limb orthosis 11 Crevice 12 Continuous body 2 Thigh rear surface support part 21 Thigh front surface holding belt 22 Pad 3 Under knee front support part 31 Pad 4 Lower leg front support part 41 Lower leg front support belt 41a Surface Fastener 41b Hook fastener 42 Pad 5 Stirrup part 51 Foot holding belt 52 Saddle part 6 One side strut 61 Upper one side strut 61a Screw 61b Screw hole 62 Lower one side strut 62a Foot joint 63 Knee joint 63a Actuating member 7 Knee joint actuator 71 Cylinder Chamber 71a Oil replenishment tank 72 Piston 73 Piston rod 73a Connecting piece 74 Hydraulic circuit 74a Extension hydraulic circuit 74b Bending hydraulic circuit 75 Check valve 76 Opening and closing valve 77 Electromagnetic solenoid 77a Actuation rod 8 Knee joint actuator 81 Cylinder chamber 82 Vane 82a Partition plate 83 Circular rotation axis 8 Hydraulic circuit 84a extended hydraulic circuit 84b flex hydraulic circuit 85 a check valve 86 closing valve 9 Sensor 91 movable bottom plate 91a hinge 92 operating line 93 through tube 94 the spring 95 wire 96 detectors

Claims (6)

A thigh rear surface support portion that supports the rear surface of the thigh, a lower knee front support portion that supports the front surface below the knee, a crus rear surface support portion that supports the rear surface of the lower leg, and a stirrup portion on which the sole of the foot rides The thigh rear support part, the lower knee front support part and the lower leg rear support part are made of a lightweight / reinforced plastic material, and the lower side of the lower knee front support part made of a lightweight / reinforced plastic material is placed on the lower leg The side of the lower leg is formed in a semi-spiral shape with a gap that allows it to enter and exit from the side, and is integrated with the lower leg rear support part below it. One side strut is provided in the up and down direction, the back support portion of the thigh and the front lower knee support portion are connected vertically by the one side strut, and the foot joint of the stirrup portion is pivotally connected to the lower end side of the one side strut. And the one side support It consists of an upper unilateral strut that connects the rear thigh support part and the lower knee front support part vertically, and a lower unilateral strut that connects the crus rear support part and stirrup part vertically. A knee joint that bends and extends, a sensor that detects that the buttocks of the stirrup touches the ground, a knee joint actuator that operates based on information from the sensor, and a knee joint actuator that When the stirrup of the stirrup is not grounded, the knee joint can be freely bent in any of the extending and bending directions, and when the stirrup of the stirrup is grounded, the knee joint is prevented from bending in the knee folding direction. One-sided strut-length lower limb orthosis characterized by allowing the knee joint to be freely extended. The knee joint actuator includes a cylinder chamber and a piston rod that expands and contracts by a piston that slides in the cylinder chamber, and the tip end of the piston rod is interlocked and connected to an operation member that fixes and releases the knee joint. The extension hydraulic circuit and the bending hydraulic circuit are branched in the middle of the hydraulic circuit communicating with the cylinder chambers on both sides, and the extension hydraulic circuit is provided with a check valve that opens when the knee joint extends and closes when the knee does not extend The one-side strut-length lower limb orthosis according to claim 1, wherein the bending hydraulic circuit is provided with an opening / closing valve that opens when the buttocks of the stirrup is not grounded and closes the circuit when the ground is grounded. The knee joint actuating device is mounted directly on the knee joint, and is a circular rotation in which a fan-shaped cylinder chamber and a fan-shaped vane that rotates while sliding in the cylinder chamber and a vane are integrally provided on a part of the circumference thereof The extension hydraulic circuit and the bending hydraulic circuit are branched in the middle of the hydraulic circuit that communicates with the cylinder chambers on both sides of the vane across the vane. The extension hydraulic circuit is not opened when the knee joint is extended. 2. A one-sided support column according to claim 1, wherein a check valve is provided that closes in the extending direction, and the bending hydraulic circuit is provided with an open / close valve that opens when the buttocks of the stirrup is not grounded and closes the circuit when grounded. Long leg brace. The sensor has a movable bottom plate that is movably mounted downward on the lower surface side of the stirrup, a spring that is mounted between the rear end side of the movable bottom plate and the collar portion of the stirrup, and the lower end side is connected to the movable bottom plate. The unilateral strut-length lower limb orthosis according to claim 1, wherein the upper end side includes an operating line connected to the on-off valve of the knee joint operating device, and the operating line is inserted through the inner tube. The sensor includes a movable bottom plate that is movably mounted downward on the lower surface side of the stirrup portion, a spring that is attached between the rear end side of the movable bottom plate and the collar portion of the stirrup portion, a rear end portion of the movable bottom plate, The one-side support | pillar length lower limb orthosis of Claim 1 which consists of the detector which detects a contact with the buttocks part of a stirrup part, the electric wire which conveys the information from a detector as an electric signal, and the penetration tube which the electric wire penetrates the inside. 6. The one-side strut-length lower limb orthosis according to claim 5, further comprising an electromagnetic solenoid for operating an on-off valve of a bending hydraulic circuit of the knee joint operating device.

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