JPH0998995A - Production method of prosthesis - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a forming material from intruding into a valve storage member by storing a closing member closed at its top and provided with an adhesive means at its back into the valve storage member and by attaching the valve storage member to a cross section model with the adhesive means. SOLUTION: At the inside center of a push pin 34, an aperture 36 which passes through a vent hole 35 formed at the bottom of a base 33 is formed, and the top of the aperture 36 is closed with a ball 37. O-rings 38 are fitted at the bottom of the push pin 34 to close between the vent holes 35 and 42 tightly. When a thigh is stored into the socket, air pressure between the thigh and the socket pressurizes the air in the vent holes 35 and 36 to lift the ball 37, and the air between the thigh and the socket is exhausted from holes 42 and a vacuum condition occurs between the thigh and the socket to fix them tightly. This prevents a resin from intruding into a valve link 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a prosthesis, which is suitable as a method for manufacturing a prosthesis provided with a valve for attaching and detaching the prosthesis by discharging and injecting air between the stump and the prosthesis. Regarding

[0002]

2. Description of the Related Art FIG. 1 is an external perspective view of a femoral prosthesis as an example of the prosthesis. As shown in FIG. 1, a socket attaching / detaching valve 30 is attached to the side surface of the socket 12 that accommodates the thigh. And the socket 1
When the thigh is housed in 2, the air in the socket 12 is exhausted to the outside through the valve 30, so that a vacuum state is created between the socket 12 and the thigh, and The inner surface and the thigh are brought into close contact with each other. Further, when the valve 30 is operated to introduce air into the socket 12, the close contact state is released and the socket 12 can be removed.

Next, a conventional method of manufacturing the femoral prosthesis 10 to which the valve 30 is attached will be described with reference to the drawings.
FIG. 8 is a process diagram showing the order of conventional manufacturing processes, and FIGS. 9 to 11 are explanatory diagrams of each process. First, FIG.
As shown in (a), a thigh model 50 is created by shaping the thigh of the person wearing the above-described thigh prosthesis 10 (step 50
0), the bottom surface is supported by the pipe 60. The upper part of the thigh model 50 is the lower leg side of the artificial leg, and the lower part is the thigh accommodation side. Subsequently, the thigh model 50 is covered with the first film 70 (step 510). Subsequently, FIG.
As shown in FIG.
And then attach the valve ring 31 to the side surface of the thigh model 50 covered with the first film 70 using an instant adhesive or using the adhesive force of the clay 92 (step 520). The lower end of the film 70 of No. 1 is tied around the pipe 60.

Next, as shown in FIG. 10A, the first film 70 is covered with a first cloth-like body 71 (step 530). As a result, the valve ring 31 is covered with the first cloth-like body 71. Subsequently, the stainless steel dish 90 is placed on the first cloth-like body 71 on the upper surface of the thigh model 50 (step 540). The tray 90 is connected to a tray (not shown) provided on the upper part of the lower leg of the artificial leg. Subsequently, the first cloth-like body 71 is covered with the second cloth-like body 72 (step 55).
0). As a result, the plate 90 is covered with the second cloth-like body 72.

Next, the second cloth 73 is covered with a second film 73 (step 560), and as shown in FIG. 10B, the first cloth 71 and the second cloth 71 are formed. The cloth-like body 72 and the lower portion of the second film 73 of
Tie to 0 to close the bottom. Then, from the direction indicated by the arrow A, the first film 70 and the second film 7 are
The resin for molding the socket is injected into the space between step 3 and step 3 (step 5).
70). Subsequently, the air between the first film 70 and the second film 73 is sucked in a direction indicated by an arrow B by a vacuum pump, the injected resin is brought into close contact with the surface of the thigh model 50, and the injection is performed. The formed resin is shaped (step 580).

[0006] Next, the thigh model 5 in which the above resin is closely adhered
0 (step 590), and the cured resin molding (socket) is separated from the thigh model 50 (step 60).
0). Subsequently, the resin covering the upper surfaces of the valve ring 31 and the dish 90 is cut (step 610) to remove the clay 92 embedded in the valve ring 31 as shown in FIG. 11 (step 620). ). Then, finally, the valve base 33 is screwed into the valve ring 31 and attached (step 630), and the femoral prosthesis 10 including the valve 30 is completed.

[0007]

However, in the above-mentioned conventional method for manufacturing a femoral prosthesis, the valve ring 31 is used.
Since there is a step of embedding the clay 92 in the inside and attaching it to the socket 12, there is a problem that the operation of embedding the clay 92 and the operation of removing the clay 92 after curing the resin take a long time. In particular, it takes time to completely remove the clay 92 embedded in the groove of the female screw carved on the inner peripheral surface of the valve ring 31, and if the clay 92 remains in the groove, the base 33 is removed. It becomes difficult to screw in.

The present invention has been made to solve the above-described problems, and its purpose is to prevent the molding material from entering the valve housing member and to mount the valve after molding. An object of the present invention is to provide a method for manufacturing an artificial limb that can be easily performed in a short time.

[0009]

In order to achieve the above-mentioned object, the present invention provides a socket for accommodating a stump, and an air between the socket and the stump. A method of manufacturing an artificial limb that integrally manufactures a valve for discharging and injecting a valve, wherein a valve housing member for housing the valve is provided so that a molding material does not penetrate into the valve housing member. A valve accommodating member, which is attached to a shaped stump model and injects the molding material between the stump model and a mold covered on the stump model to manufacture a prosthesis. In addition, the upper surface is closed, and the closing member is provided with a sticking means on the back surface.
The technical means is adopted which includes a step of attaching the valve accommodating member to the stump model by the attaching means.

According to a second aspect of the present invention, in the method of manufacturing the artificial limb according to the first aspect, the closing member is formed of an elastic material into a shape that matches the internal shape of the valve accommodating member. Adopt technical means.

[0011]

In the invention described in claim 1 or 2, since the closing member which is housed in the valve housing member can close the upper surface of the valve housing member, the molding material penetrates into the valve housing member. Can be prevented.
Moreover, since the sticking means is provided on the back surface of the closing member, if the closing member is housed in the valve housing member, the sticking means causes the valve housing member to move to the stump model. Can be installed on. That is, the valve accommodating member is attached and the molding material is infiltrated into the valve accommodating member by a simple operation of accommodating the closing member in the valve accommodating member and attaching the back surface thereof to the stump model. Prevention can be easily realized.
Moreover, after molding, the valve can be attached by a simple operation of removing the blocking member. Therefore, the details of the valve mounting process in the manufacture of the artificial limb can be simplified, and the overall manufacturing time can be shortened.

Particularly, in the invention according to claim 2, since the closing member is formed of an elastic material in a shape that matches the internal shape of the valve accommodating member, it is brought into close contact with the inner surface of the valve accommodating member. be able to. Therefore, it is possible to prevent the closing member from coming off the valve housing member. Moreover, since the valve accommodating member is not displaced with respect to the closing member, the valve accommodating member can always be attached to the same position of the stump model.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings. In this example,
Manufacturing method of artificial limb of the present invention (hereinafter, abbreviated as manufacturing method)
As a typical example, a method for manufacturing a thigh artificial leg to be attached to the thigh as the stump will be described. First, the structure and operation of the valve 30 used in the manufacturing method of the present invention will be described with reference to FIG. FIG. 2A is a plan view of the valve 30 housed in the valve ring 31 as a valve housing member, and FIG. 2B is a front sectional view thereof. As shown in FIG. 2B, the valve 30 is formed by screwing a base 33 having an outer peripheral surface engraved with a male screw (not shown) into a valve ring 31 having an inner peripheral surface engraved with a female screw (not shown). , Are housed in the valve ring 31. A push pin 34 is housed in the center of the inside of the base 33.
It is supported by 0 in the inside of the base 33 so as to be able to move up and down.

At the center of the inside of the push pin 34,
A hole 36 is formed in the bottom surface of the base 33 so as to communicate with the ventilation hole 35, and the upper portion of the hole 36 is closed by a ball 37. In addition, the base 33
The side surface of the vent hole 42, which can communicate with the vent hole 35,
42 is formed. The ball 37 is urged downward (to close the hole 36) by a spring 39 housed between the ball 37 and an adjustment bolt 41 embedded in the upper portion of the push pin 34. An O-ring 38 is fitted to the lower portion of the push pin 34 to seal between the vent holes 35 and 42. An O-ring 32 is fitted to the lower portion of the base 33 to seal a portion where the base 33 and the valve ring 31 are in contact with each other (a portion where the thread grooves are engaged with each other).

When the thigh is housed inside the socket 12, the air pressure between the thigh and the socket 12 pressurizes the air in the ventilation holes 35 and 36, The ball 37 is lifted by the pressing force, and the air between the thigh and the socket 12 is released into the hole 4
2, 42 discharged to the outside, the thigh and the socket 1
A vacuum state is created between the thigh and the socket 12
And are closely attached. Further, when the push pin 34 is pressed, the O-ring 38 moves downward, the sealed state between the hole 42 and the vent hole 35 is released, and external air is discharged from the holes 42, 42 to the above-mentioned state. After passing through the gap between the base 33 and the push pin 34, the gas flows into the inside of the socket 12 through the ventilation hole 35, the vacuum state is released, and the socket 12 can be removed.

Next, the manufacturing method of the present invention will be described with reference to the drawings. FIG. 4 is a process diagram showing the process sequence of the manufacturing method of the present invention using a method called socket lamination, and FIG.
7 to 7 are explanatory views showing each step. First, FIG.
As shown in (a), the thigh of the person wearing the above-described thigh prosthesis 10 is modeled with gypsum to create a thigh model 50 (step 100), and the bottom surface thereof is supported by the pipe 60. The upper surface of the thigh model 50 is the lower leg side of the artificial leg, and the lower surface is the thigh housing side. Subsequently, the thigh model 50 is covered with a first film 70 made of PVA (polyvinyl alcohol) (step 110). Subsequently, as shown in FIG. 5B, a rubber plug 80 as a closing member made of natural rubber is fitted inside the valve ring 31, and the lower end of the first film 70 is bound around the pipe 60. .

The structure of the rubber plug 80 will be described with reference to the drawings. FIG. 3 is a front explanatory view of the rubber plug 80. As shown in FIG. 3, the body 82 of the rubber plug 80 is formed in a cylindrical shape that matches the internal shape of the valve ring 31, and the body 82 is formed on the upper surface thereof.
A cap-shaped lid portion 83 having a diameter larger than the diameter and having a brim portion 84 is integrally formed. A peelable seal 81 as a sticking means is stuck to the back surface of the rubber plug 80, and the sticking surface is exposed when the seal 81 is peeled off. When the rubber plug 80 is fitted on the valve ring 31, the collar 8 of the lid 83 is attached.
4, the upper edge 43 of the valve ring 31 (see FIG.
(See (b)), and the upper opening surface of the valve ring 31 is closed. That is, it is possible to prevent the acrylic resin from entering the inside of the valve ring 31.

Subsequently, the seal 81 of the rubber plug 80 fitted in the valve ring 31 is peeled off, and the sticking surface exposed by the peeling is stuck to the side surface of the socket 12. This allows the valve ring 31 to be attached to the side surface of the socket 12 (step 12).
0). The rubber plug 80 may be fitted into the valve ring 31 and then the seal 81 may be peeled off. Alternatively, the valve ring 31 may be applied to the side surface of the socket 12 and the rubber plug 80 with the seal peeled off may be attached. May be fitted. Next, as shown in FIG. 6A, the first film 70 is covered with a first cloth-like body 71 as a core material of the socket 12 (step 130). As a result, the valve ring 31 is covered with the first cloth-like body 71. Then, the stainless dish 90 is placed on the first cloth-like body 71 on the upper surface of the thigh model 50 (step 140). The plate 90 is connected to a receiving plate (not shown) provided on the upper part of the lower leg of the artificial leg.

Subsequently, the first cloth-like body 71 is covered with the second cloth-like body 72 as the core material of the socket 12 (step 150). As a result, the plate 90 is attached to the second cloth-like body 7
It becomes the form covered by 2. In addition, the first and second
As the cloth-like body, cloth or stockinet made of cotton or synthetic fiber is used. Next, the second cloth-like body 72
Is covered with a second film 73 made of PVA (step 16
0), as shown in FIG. 6B, the first cloth-like body 7
The lower portions of the first and second cloth-like bodies 72 and the second film 73 are collectively tied to the pipe 60 to close the lower portions. Subsequently, an acrylic resin for socket molding is injected between the first film 70 and the second film 73 from the direction indicated by the arrow A (step 170). The first cloth-like body 71 and the second cloth-like body 72 are impregnated in the acrylic resin.

Subsequently, the air between the first film 70 and the second film 73 is sucked in the direction indicated by the arrow B by a vacuum pump, and the injected acrylic resin is brought into close contact with the surface of the thigh model 50. Then, the shape of the injected acrylic resin is adjusted (step 180). Other thermoplastic resins may be used instead of the acrylic resin.
Next, the thigh model 50 to which the acrylic resin is adhered is heated in an oven for 20 to 30 minutes to accelerate curing,
Then, it is exposed to air and cooled for 20 to 30 minutes (step 190). Then, the excess first film 70, first cloth-like body 71, second cloth-like body 72, and second cloth
The film 73 is cut off, and the cured resin molded product (socket) is separated from the thigh model 50 (step 20).
0). Then, excess resin covering the upper surfaces of the valve ring 31 and the dish 90 is cut (step 210), and the rubber plug 80 fitted in the valve ring 31 is removed as shown in FIG. Remove (step 220). Then, finally, the valve 30 is screwed into and attached to the valve ring 31 (step 230), and the thigh artificial leg 10 is completed.

As described above, according to the manufacturing method of this embodiment, the rubber plug 80 is fitted into the valve ring 31,
The valve ring 31 can be attached by a simple operation of attaching the back surface of the rubber plug 80 to the surface of the socket 12. Moreover, after molding, the rubber plug 8
The valve 30 to the valve ring 31 can be simply pulled out.
Can be installed. Therefore, the entire manufacturing time can be shortened. Moreover, the valve ring 31
There is no fear that the screw groove of the inner surface of the valve is clogged with clay 92 or the like and the valve 30 becomes difficult to screw in.

In the above embodiment, the method for manufacturing the thigh prosthesis has been described as a representative, but the invention can also be applied to a method for manufacturing a lower leg prosthesis, or another prosthesis such as an upper arm prosthesis or a forearm prosthesis. it can. Further, in the above embodiment, the rubber plug made of natural rubber was used as the closing member, but a urethane foam plug may be used. Further, a resin stopper formed in the same outer peripheral shape as the valve 30 may be screwed.

[0023]

As described above, according to the manufacturing method of the present invention, the valve accommodating member is inserted into the socket by a simple operation of accommodating the closing member in the valve accommodating member and attaching the back surface of the closing member to the socket. Can be installed on. Moreover, after molding, the valve can be attached to the valve accommodating member simply by removing the closing member. Therefore, the total manufacturing time of the artificial limb can be shortened.
Moreover, there is no possibility that the thread groove on the inner surface of the valve accommodating member will be clogged with clay or the like to make it difficult to mount the valve.

[Brief description of drawings]

FIG. 1 is an external view of a femoral prosthesis manufactured by a manufacturing method according to an embodiment of the present invention.

FIG. 2A is a plan explanatory view of a valve attached to a socket of a femoral prosthesis, and FIG. 2B is a front sectional explanatory view of FIG. 2A.

FIG. 3 is a front explanatory view of a rubber plug fitted into a valve ring.

FIG. 4 is a process chart showing a process sequence of a manufacturing method according to an embodiment of the present invention.

FIG. 5A is an explanatory diagram showing a step of covering the thigh model with the first film, and FIG. 5B is an explanatory diagram showing a step of attaching the valve ring and the rubber plug to the thigh model.

FIG. 6A is an explanatory diagram showing a step of covering the first film with a first cloth-like body, setting a dish, and covering with the second cloth-like body and the second film. , (B) are explanatory views showing steps of performing resin injection and air suction.

FIG. 7 is an explanatory diagram showing a process of removing a rubber plug from a molded product and mounting a valve.

FIG. 8 is a process chart showing a process sequence of a conventional manufacturing method.

FIG. 9A is an explanatory diagram showing a step of covering the thigh model with the first film, and FIG. 9B is an explanatory diagram showing a step of embedding clay in the valve ring and attaching it to the thigh model.

FIG. 10A is an explanatory diagram showing a step of covering the first film with the first cloth-like body, setting a dish, and covering with the second cloth-like body and the second film. , (B) are explanatory views showing steps of performing resin injection and air suction.

FIG. 11: Clay is removed from the valve ring of the molded product,
It is explanatory drawing which shows the process of attaching a valve.

[Explanation of symbols]

 10 Prosthesis for thigh 12 Socket 20 Lower leg pipe 30 Valve 31 Valve ring 50 Thigh model 70 First film 71 First cloth-like body 72 Second cloth-like body 73 Second film 80 Rubber stopper 90 Plate

Claims (2)

[Claims] 1. A method for manufacturing a prosthesis, which integrally manufactures a socket accommodating a stump portion and a valve for discharging and injecting air between the socket and the stump portion,
A valve accommodating member for accommodating the valve is attached to the stump model in which the stump is shaped so that the molding material does not enter therein, and the stump model and the stump model are attached. In the method of manufacturing a prosthesis by injecting the molding material between the mold covered with the above, in the valve housing member, while closing the upper surface,
A method for manufacturing a prosthesis, comprising a step of accommodating a closing member having a sticking means on a back surface thereof, and attaching the valve accommodating member to the stump model by the sticking means. 2. The method for manufacturing a prosthesis according to claim 1, wherein the closing member is formed of an elastic material in a shape that matches the internal shape of the valve accommodating member.