JP2007135916A - Foot sole mounting body for lower extremity orthosis, and lower extremity orthosis - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lower extremity orthosis which is not slippery for indoor walking, and also, with which shoes can smoothly be put from above, and to provide a foot sole mounting body for the lower extremity orthosis. <P>SOLUTION: This foot sole mounting body 10 can be fitted in the lower extremity orthosis, and is used for mounting the foot sole. The bottom rear surface is provided with an anti-slipping section 12 (a location including second to fourth toe MP joint positions), an anti-slipping section 14 (a location including the heel rear section to the heel back surface positions excepting right and left both side edge positions of the heel), and an easily slipping section 11 (a location including the right and left both side edge positions). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lower limb orthosis used as an assisting device during walking, and a planter for a lower limb orthosis used for a lower limb orthosis.

  There are cases where the ankle joint cannot be moved freely on its own will due to cerebral overflow, cerebral infarction, radial paralysis due to trauma, or a congenital disease. Since a patient with this disorder cannot walk well, a lower limb orthosis is generally used as an auxiliary device. As a case, hemiplegia in which one leg is paralyzed is the most, and walking training using the lower limb orthosis is recommended in order to realize a healthy walking.

  The lower limb orthosis includes a type that fixes the ankle, a type that assists the movement of the ankle, a type that is integrated with the shoe (hereinafter sometimes referred to as a shoe integrated type), and a type that wears the shoe from above the lower limb orthosis ( Various types have been proposed, which may be referred to as an internal mounting type hereinafter.

  Among these, for example, a type in which a cloth band is attached to a synthetic resin main body that covers the bottom surface of the foot to the inflated shin surface has been proposed (for example, see Patent Documents 1 and 2). The synthetic resin material of the lower limb orthosis body generally has a low frictional resistance, and when inserted into the shoe with the lower limb orthosis attached to the foot, the synthetic resin body is used as a cloth in the shoe. It slides smoothly when touching, and you can easily wear shoes.

On the other hand, when walking indoors without wearing shoes, the above-mentioned internal mounting type is inappropriate because the bottom back surface of the lower limb orthosis slides, and apart from this, a rubber sheet is attached to the bottom back surface. Adhered ones have been proposed (hereinafter sometimes referred to as back rubber type). FIG. 5 is a bottom view showing the bottom back of the back rubber type. As shown in FIG. 5, in the back rubber type lower limb orthosis 50, a rubber sheet 52 is provided on the entire bottom back surface.
JP 2005-204800 A Japanese Patent Laid-Open No. 11-197170 (refer to FIGS. 2, 4 and 5 in particular)

  Although the lower limb orthosis according to various life scenes has been proposed as described above, it is necessary to change to another lower limb orthosis each time when going out with shoes and walking indoors. Since it is complicated and it is necessary to prepare a plurality of types of lower limb orthosis, it imposes an economic burden on the user.

  Therefore, it has been attempted to put on shoes from the back rubber type. However, when the shoes are put on, there is a problem that the rubber sheet on the back side rubs against the inner surface of the shoes and this causes frictional resistance, which makes it hard to wear. In particular, it is desirable for a user who has been paralyzed due to cerebral infarction or the like to easily operate not only his feet but also his hands.

  The present invention has been made paying attention to the circumstances as described above, and its purpose is not to be slippery when walking indoors, and the lower limb that can be worn smoothly when wearing shoes from above. An object of the present invention is to provide an orthosis and a planter for lower limb orthosis.

  From the viewpoint of operability when wearing shoes as described above, it is better that the bottom back surface of the foot rest is slippery, but when walking with the lower limb orthosis without wearing shoes, the bottom back surface slips. The harder is better. As a result of intensive studies by the present inventors regarding this conflicting request, (1) in the operation of wearing a shoe, the part that contacts the inner surface of the shoe is the side edge part of the left and right (inside / outside of the foot) of the bottom surface. (2) When walking, especially where the grip force with the floor surface is required, the heel part and the metatarsal proximal phalanx joint (hereinafter referred to as the MP joint) (3) In addition, the present inventors have found that the entire range of these portions does not necessarily need to be non-slip.

  A plantar placement body for a lower limb orthosis according to the present invention made from such a viewpoint is a plantar placement body used for a lower limb orthosis for placing a sole, and the bottom back surface of the plantar placement body Comprises an anti-slip portion and an easy-slip portion, and the anti-slip portion is at least one of the second to fourth fingers, the metatarsal proximal phalanx joint position, and the heel rear part excluding the left and right side edge positions of the heel ~ It is formed in the back surface position, The said easy slip part is formed in the right-and-left both-sides edge position covering the full length of the said bottom back surface, It is characterized by the above-mentioned. The above-mentioned “back of the heel” is a portion of the back of the heel on the bottom back surface, and does not mean a position that rises to the Achilles tendon side beyond the bottom back surface.

  A lower limb orthosis according to the present invention is characterized by comprising the above-mentioned sole placement body and a lower leg appendage that supports a lower leg part.

  FIG. 1 [(a) is a bottom surface for explaining the location of the slippery portion on the bottom back surface of the sole mounting body in relation to the sole, with respect to the placement location of the non-slip portion and the easy slip portion on the bottom back surface. FIG. 4B is a bottom view for explaining the location of the non-slip portion on the bottom rear surface of the sole placement body. In FIG. 1, the shape of the foot is drawn in order to make it easy to understand the position of the MP joint and the position of the finger pad.

  The slippery portion needs to be formed over the entire length of the bottom back surface at least at the left and right side edge positions on the bottom back surface (locations D and E shown in FIG. 1A). When wearing shoes, first insert the tip of the foot from the ankle opening of the shoe, then proceed in the longitudinal direction of the foot (longitudinal direction), and finally insert the heel part, at that time D, E locations Will rub against the inner surface of the shoe. And since this rubbing part is an easy-slip part, it can wear shoes smoothly.

  Although the back of the heel is a non-slip part, there is a concern that this may become a resistance when the heel is inserted into the shoe, but the back of the heel is gripped with the floor when walking as described below. Since this is a place where force is required, it is not appropriate to make this whole part slippery. Although the anti-slip part is arranged in the heel part, the left and right side edge positions of the heel part are easy-sliding parts, so that sliding into the shoe can be performed relatively well. The operation of inserting the part is an operation of pulling up the center of the back of the shoe (the position of the Achilles tendon), and the heel can be inserted relatively easily, so that the operability of wearing the shoe is not adversely affected.

The range of the left and right side edge positions forming the easy-sliding portion is preferably a range of 4 mm or more (indicated by width W) inward from the left and right side ends. More preferably, it is 5 mm or more. However, from the viewpoint of securing the anti-slip portion between the rear portion of the heel and the back surface of the heel, the range of the easy-slip portion between the rear portion of the heel and the back surface of the heel (the range indicated by the widths W ₁ and W ₂ in FIG. 1A). Is preferably 15 mm or less from the left and right ends.

  As the non-slip portion, at least one metatarsal proximal phalanx joint position (at least a part of the position A shown in FIG. 1B) of at least one of the second to fourth fingers on the bottom back surface, and It is necessary to form in the rear part of the heel to the rear face position of the heel (excluding the entire area B shown in FIG. 1B) excluding the left and right side edge positions. In FIG. 1B, the range of wrinkles is indicated by a two-dot chain line.

  Basically, the body support on the sole of the foot is based on a total of 3 points, 2 points on the MP joint and the heel. When walking, first put the heel on the floor and then put the weight on the entire sole. Next, the operation of raising the kite and stepping back and kicking out with the MP joint is performed.

  As for the heel among the three points of the above support, grip force is required in the first heel-contacting scene and the sole-full-face contact scene, but at this time, the slipper is not necessarily provided on the entire heel surface. However, if 40% (area ratio) or more of them are non-slip parts, the anti-slip part will be a frictional resistance and can catch the floor, so there is no anti-slip part at the left and right side edge positions. But there is almost no trouble. In particular, when the front part of the heel is grounded, the rear part of the heel is also grounded at the same time. Therefore, if a non-slip part is formed at the rear part of the heel, the front part of the heel is not necessarily slippery. It need not be part. On the other hand, for the back of the heel and the back of the heel, a grip force is required in the scene of heel contact during walking. Therefore, as described above, the anti-slip portion is formed at the rear portion of the heel to the rear surface of the heel except for the left and right side edge positions of the heel.

  Next, the two support points of the MP joint will be described. These two support points are required to have a gripping force with the floor surface in the scene where the sole of the foot is in contact with the ground during walking and in the scene of stepping back and kicking out. Because the two support points hit the floor at the same time, it is not always necessary to provide anti-slip as two separate points, and the entire range of the MP joint need not be anti-slip, at least If the MP joint position of one finger is a non-slip part, the anti-slip part of the MP joint of the one or more fingers is a frictional resistance in the above-mentioned ground contact surface and stepping back / kicking out scenes. Thus, walking can be performed smoothly. From this point of view, as described above, an anti-slip portion is formed at the MP joint position of at least one of the second to fourth fingers.

  In addition, it is preferable that the non-slip portion is formed in 60% (area ratio) or more of the entire range of the second to fourth finger MP joint positions (A range shown in FIG. 1B). This is because the grip force to the floor surface during walking increases.

  As described above, by arranging the non-slip part and the easy-slip part at a predetermined place on the bottom back surface, the operation of putting on shoes is easy and the floor surface is gripped when walking with the lower limb orthosis. I can walk.

  About the said non-slip | skid part, a slip resistance coefficient (The coefficient (henceforth a CSR value may be called hereafter) measured by the JIS A1454 high tension type flooring material test method slip performance test)) is 0.45. This is recommended. C. for shoe sole materials. S. This is because an R value of 0.45 or more is considered difficult to slip. In addition, from the point that the grip power to the floor surface increases, C.I. S. A higher R value is preferable, but generally, if the grip force is too high, wear tends to occur and the durability of the non-slip portion tends to be inferior. S. The R value is preferably 1.0 or less.

  For easy-slip parts, C.I. S. It is recommended that the R value be 0.2 or less. In general, since it is said that it is easy to slip when it is 0.2 or less, if it is about this level, a high frictional resistance is hardly generated with respect to a general shoe inner surface, and the operation of wearing shoes can be performed smoothly. Because. C. of slippery part S. The R value is more preferably 0.1 or less.

In addition, in the present invention, the anti-slip portion is a finger pad position of at least one of the first to fifth fingers (of C ₁ , C ₂ , C ₃ , C ₄ , C ₅ shown in FIG. 1B). It is preferable that it is formed in at least one of the locations.

When kicking out during walking, the finger pad part also contributes to the kicking out action. Therefore, if a non-slip part is formed at the finger pad position, it can be expected that walking can be performed more smoothly. However, with respect to the finger pad portion (C ₁ ) of the first finger and the finger pad portion (C ₅ ) of the fifth finger, as shown by C ₁ and C ₅ in FIG. The non-slip portion is not formed in the case. As described above, this position is a place that often rubs against the inner surface of the shoe when the shoe is worn, and if a non-slip portion is formed at this position, the shoe may be difficult to wear.

  Furthermore, in the present invention, it is preferable that the anti-slip portion projects beyond the easy-slip portion. The term “projecting” means that the surface of the anti-slip portion is higher than the surface of the easy-sliding portion, in other words, it is protruding or raised.

  Since the non-slip portion protrudes in this way, when walking, the anti-slip portion hits the floor before the adjacent easy-slip portion, and when the foot sole leaves the floor, it also leaves later, so to the floor The grip power of can be demonstrated well.

  However, if the non-slip portion is excessively projected, a feeling of foreign matter is given to the sole, so that the protruding height is preferably 3 mm or less. On the other hand, the lower limit of the overhang height is preferably 0.3 mm at the initial stage of the plantar body product. The reason for this is that the material generally used for the non-slip part is more easily worn than the material used for the easy-slip part. It is because there is a possibility that it may not change. As described above, it has been found that if the height is 0.3 mm or more, a certain height can be maintained for about three years in a normal use state. The above-mentioned overhang height does not mean the height from a special depression (such as a depression for attaching a lower leg appendage, which will be described later) formed in the easy-sliding portion, but a level difference in a state where it is completed as a lower limb orthosis. (Height).

  In the present invention, it is preferable that the easy slip portion is formed at the metatarsal proximal phalange joint position of the first finger and the metatarsal proximal phalange joint position of the fifth finger on the bottom back surface.

  Since the MP joint is a portion having a wide foot width, it is relatively easy to hit the inner surface of the shoe when wearing the shoe. Therefore, in addition to the left and right side edge positions, the first finger MP joint position (point F shown in FIG. 1 (a)) and the fifth finger MP joint position (shown in FIG. 1 (a)). The operation of putting on shoes can be performed more easily.

  According to the plantar body for lower limb orthosis and the lower limb orthosis according to the present invention, the operation of wearing the lower limb orthosis and wearing shoes from above can be easily performed, and the lower limb orthosis without wearing the shoes on top. When walking as it is, there is a grip force with respect to the floor surface, and walking can be performed smoothly.

<Embodiment 1>
FIGS. 2A and 2B are diagrams illustrating the foot support 10 for a lower limb orthosis according to the first embodiment of the present invention, in which FIG. 2A is a bottom view seen from the bottom back surface, and FIG. 2B is a side view seen from the inside foot. It is. FIG. 3 is a perspective view showing the lower limb orthosis 20 to which the plantar placing body 10 is attached. The lower limb orthosis 20 is a short lower limb orthosis for assisting a leg portion below the knee, and is used exclusively as an assist device for a patient who is unable to operate the ankle.

  The lower limb orthosis 20 fixes a plantar placing body 10 for placing a sole, a crus appendage supporting a lower leg part, and the plantar placing body 10 and the crus appendage to a foot (not shown). It consists of bands 25 and 22 for the purpose. The lower leg appendage includes a lower support 24 and an upper support 21 provided inside and outside the foot, connecting members 23 and 26 for connecting the lower support 24 and the upper support 21 so as to be swingable in the bottom flexion and dorsiflexion directions, and It consists of a shin pad portion 27 which is fitted to the upper column 21 (note that the two upper columns 21 inside and outside the foot are connected at the upper part) and covers the shin side of the foot. In FIG. 3, reference numeral 28 denotes a bolt for attaching the band 25 and the lower support column 24 to the sole placement body 10. The lower support 24, the upper support 21, and the connecting members 23 and 26 are all made of metal, the sole placement body 10 and the shin pad 27 are made of synthetic resin, and the bands 25 and 22 are made of cloth, leather, or the like. Made of a flexible sheet material.

  Next, the sole placement body 10 will be described.

  First, the outer shape of the plantar mounting body 10 will be described. The plantar mounting body 10 has a vertically wide shape that is generally wide along the sole, and the rear end 10b rises slightly along the back of the heel, 10c and the outer end 10d are also slightly raised along the inner and outer sides of the foot. A depression 13 is formed in the vicinity of the arch of the sole mounting body 10, and the depression 13 has a shape in which the sole portion of the band 25 and the lower support 24 is fitted, and the band 25 and the lower support 24 are attached. In this case, the protruding portion by the band 25 or the like does not occur on the sole.

The sole mounting body 10 is made of an ethylene propylene rubber (EPR) or an ethylene propylene diene rubber (on a part of the bottom back surface of a mounting body main body 17 (thickness 2 to 3 mm) made of polyolefin resin such as polypropylene. The anti-slip portions 12, 14, 15, 16 made of an olefinic thermoplastic elastomer such as EPDM) are laminated, and the place where the mounting body 17 is exposed becomes the easy-slip portion 11. C. of this slippery portion 11 S. The R value is, for example, 0.1, and the C.V. S. The R value is, for example, 0.5. As shown in FIG. 2 (a), the anti-slip portion is composed of four positions, that is, the second to fourth finger MP joint positions on the bottom back surface of the sole platform 10 to the first to fifth finger pad positions (however, Front non-slip portion 12 formed over the left and right edge positions of the first and fifth fingers (excluding the entire range of A and C _{1 to 5} shown in FIG. 1B). ) And the wrinkle-preventing portion 14 formed at the wrinkle position excluding the positions of the left and right side edge positions of the wrinkle and the position of the depression 13 (formed so as to include the entire range B shown in FIG. 1B), and It consists of central anti-skid parts 15 and 16 formed in the center part of the sole. The central anti-slip portions 15 and 16 are separated for forming the recess 13. These anti-slip portions 12, 14, 15, and 16 protrude from the easy-slip portion 11 by 1 to 2.5 mm (the overhang height T shown in FIG. 2B). It is not the height from the dent, but the level difference (height) in the finished state as a lower limb orthosis). Note that the heel part is particularly easy to wear, so the heel part is 2.5 mm and the other parts are about 1 mm.

  The non-slip portions 12, 14, 15, 16 are stacked on the mounting body 17 by a different material molding method. For example, the non-slip portions 12, 14, 15, 16 are formed by injection molding as a first shot. On the other hand, in the second shot, the raw material of the mounting body main body 17 is laminated by injection molding. Thus, by laminating the materials in an uncured state, the non-slip portions 12, 14, 15, 16 with respect to the mounting body main body 17 are firmly joined and integrated. In particular, when the same kind of material is used as the material of the mounting body 17 and the anti-slip portions 12, 14, 15, and 16, for example, all of them are olefin resins, both are familiar and can be joined firmly. As such a different material forming method, for example, a known method as disclosed in JP-A-8-207079 can be applied.

  In addition, if it is the structure which affixes a non-slip sheet | seat with an adhesive agent, when it is a form raised a little along the shape of a heel or a foot inside and outside, it will be easy to peel from the edge of a non-slip sheet in this rising part. In particular, since olefinic resins are difficult to adhere, there is a concern of peeling when a rubber sheet is bonded with an adhesive. However, if the molding method is to laminate in an uncured state and cure this as described above, the non-slip portion 12 and the like are integrally molded with the mounting body main body 17 and therefore hardly peel off.

  The easy-sliding portion 11 from which the mounting body main body 17 is exposed is formed on the bottom back surface other than the anti-slip portions 12, 14, 15, 16, and specifically, the left and right sides on the bottom back surface of the sole mounting body 10. It is formed over the entire length of the bottom back surface (the entire length in the longitudinal direction) at both side edge positions (the entire range of D and E shown in FIG. 1A), and at the MP joint position of the first finger (FIG. 1A). The entire F range shown), the MP joint position of the fifth finger (the entire G range shown in FIG. 1A), and the first metatarsal head position.

  Next, the case where the lower limb orthosis 20 is used will be described.

  When the lower limb orthosis 20 is attached to the foot and the person walks without wearing shoes, the non-slip portion 12 etc. hits the floor before the easy-slip portion 11 and the anti-slip portion 12 etc. firmly Because it grips the floor, you can walk with almost no sense of sliding. Further, for each scene of walking motion, the floor can be gripped by the anti-slip portion 14 first in the case of the heel contact, and the floor can be gripped by the anti-slip portions 12, 14, 15 and 16 in the case where the entire sole touches the ground. Next, in the scene of kicking back and kicking, the floor can be gripped by the non-slip portion 12 and kicked firmly.

  In performing the operation of putting shoes on the lower limb orthosis 20 while wearing it on the foot, the left and right side edge positions on the bottom back surface and the first and fifth finger MP joint positions (D, E, The range of F and G) is the easy-sliding portion 11, and these portions are exclusively in contact with the inner surface of the shoe, so that the frictional resistance is small and the shoe can be worn smoothly.

<Embodiment 2>
FIG. 4 is a bottom view of the footrest mounting body 30 for the lower limb orthosis according to the second embodiment of the present invention as seen from the bottom back surface thereof.

  In the first embodiment, the non-slip portion 12 provided at the MP joint position is shown as a lump, but in the second embodiment, the non-slip portion 32 and 33 are divided into two portions. Further, the non-slip portion 34 of the heel portion is formed from the heel rear portion to the heel rear surface position excluding the left and right side edge positions of the heel, and no anti-slip is formed at the heel front portion.

  Even in the lower limb orthosis to which the plantar mounting body 30 of the second embodiment is attached, when walking on the floor as it is, the anti-slip portions 32, 33, 34 grip the floor surface well, so that it is difficult to slide and walk. There is almost nothing, and when the shoe is put on from above, it can be put on smoothly by the slippery portion 31.

  As mentioned above, the present invention has been described more specifically with examples. However, the present invention is not limited by the above examples, and may be implemented with appropriate modifications within a range that can be adapted to the above purpose. Of course, they are all possible and are included in the technical scope of the present invention.

  For example, in the first embodiment, the configuration in which the anti-slip portion 12 or the like made of another material is stacked on the mounting body main body 17 (the exposed portion becomes the easy-slip portion 11) is shown, but the present invention is not limited to this. The sole mounting body is made of a synthetic resin, and the anti-slip portion is formed on a rough surface (for example, a jagged surface by a file or the like) to provide an anti-slip function and to make the non-slip portion slip. It may be made slippery by forming on the surface.

(A) is a bottom view for demonstrating the arrangement | positioning location of the easy-slip part in the bottom back surface of the plantus mounting body which concerns on this invention, (b) in the bottom back surface of the plantus mounting body which concerns on this invention. It is a bottom view for demonstrating the arrangement | positioning location of a non-slip | skid part. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure showing the plantar mounting body for lower limbs orthosis concerning Embodiment 1 of this invention, (a) is the bottom view seen from the bottom back surface, (b) is the side view seen from the foot inner side. It is a perspective view showing the lower limb orthosis which concerns on one Embodiment of this invention. It is the bottom view which looked at the plantar mounting body for lower limbs orthosis concerning Embodiment 2 of the present invention from the bottom back. It is a bottom view which shows the bottom back of the back rubber type in the conventional leg apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,30 Foot mounting body for lower limb orthosis 11,31 Sliding part 12,14,15,16,32,33,34 Anti-slip part 13 Dimple 17 Mounting body 20 Lower limb orthosis 21 Upper strut 22,25 Band 23, 26 connecting member 24 lower support 27

Claims (5)

In a plantar mounting body used for a lower limb orthosis,
The bottom back surface of the sole mounting body includes a non-slip portion and an easy-slip portion,
The anti-slip portion is formed at the metatarsal proximal phalange joint position of at least one of the second to fourth fingers, and at the back of the heel to the back of the heel except the positions of the left and right side edges of the heel,
The easy-to-slip portion is formed at the left and right side edge positions over the entire length of the bottom back surface.   The plantar placement body for a lower limb orthosis according to claim 1, wherein the anti-slip portion is formed at a finger pad position of at least one of the first to fifth fingers.   The lower limb orthosis according to claim 1 or 2, wherein the easy slip portion is formed at a metatarsal proximal phalange joint position of a first finger and a metatarsal proximal phalange joint position of a fifth finger on the bottom back surface. For foot sole mounting body.   The sole mounting body for a lower limb orthosis according to any one of claims 1 to 3, wherein the anti-slip portion projects beyond the easy-slip portion.   A lower limb orthosis comprising the plantar placing body according to any one of claims 1 to 4 and a lower leg appendage supporting a lower leg part.

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