JP4804982B2 - Lower limb exercise equipment - Google Patents

Description

  The present invention relates to a lower limb exercise device for performing training of an extension (extension) operation and a bending (reflection) operation of a lower limb (knee joint).

  2. Description of the Related Art Conventionally, there has been provided a lower limb exercise device for training of extension operation and flexion operation of a knee joint. The lower limb exercise apparatus is an apparatus for training an extension operation and a flexion operation of a knee joint by an exerciser pushing and moving a foot pad to which a predetermined load is applied with the lower limb. When using the lower limb exercise equipment to perform extension exercise training, place the foot pad below the athlete's knee and bend the athlete's knee joint so that the front surface of the lower limb (the shin side facing away) The surface of the foot) against the foot pad. Then, the exerciser stretches the knee joint, pushes the loaded foot pad forward, and performs an extension motion training. On the other hand, when performing a flexion training, the foot pad should be placed in front of the athlete's knee and the knee joint of the athlete should be stretched, with the lower leg placed on the foot pad and the lower leg The surface (calf side surface) is brought into contact with the foot pad. And an exerciser pushes down the foot pad to which load was applied by bending a knee joint, and performs training of a flexion action (for example, refer to patent documents 1).

  The lower limb exercise device is provided with load introducing means for applying a load to the foot pad. As shown in FIG. 17, the conventional load introducing means has a schematic configuration in which a support arm 102 for supporting a foot pad 101, a rotating shaft 107 extending in the left-right direction, a rotating body 103 rotating in a vertical direction, A weight 104 that is movable in the direction, and a belt 106 that is folded up and down by a fulcrum roller 105 disposed above the weight 104 and has one end attached to the rotating body 103 and the other end attached to the weight 104. Yes. According to this load introducing means, when the exerciser pushes the foot pad 101 with the lower limbs, the rotating body 103 is rotated, and one end of the belt 106 is wound around the circular arc surface 103 a formed on the rotating body 103. When one end of the belt 106 is wound around the circular arc surface 103 a of the rotating body 103, the belt 106 is wound around the rotating body 103, and the other end of the belt 106 is pulled up to the other end of the belt 106. The attached weight 104 is lifted. A tensile force is generated in the belt 106 by the load of the weight 104 that is lifted, and a load is applied to the foot pad 101.

  In the conventional lower limb exercise device 100, a support arm 102 is rotatably attached to a rotating body 103, and the relative angle of the arm 102 with respect to the rotating body 103 can be adjusted. That is, only the support arm 102 can be rotated without rotating the rotator 103. Specifically, a rod-shaped rotating shaft 107 is rotatably inserted at the rotation center position of the rotating body 103, and the end of the support arm 102 is fixed to the rotating shaft 107. A locking arm 108 facing the surface of the rotating body 103 is fixed. Further, the rotating body 103 is formed with a plurality of holes 103b formed at a predetermined pitch, and the locking arm 108 is provided with a plunger 109 which is inserted into and locked to any of the holes 103b. Yes. The support arm 102, the rotating shaft 107, and the locking arm 108 are integrally formed and can rotate with respect to the rotating body 103. Then, the arm 102, the rotating shaft 107, and the locking arm 108 are integrally rotated to adjust the support arm 102 to a predetermined angle, and then the plunger (locking member) 109 is fitted into the hole 103b. The support arm 102 and the like are configured to be engaged with the rotating body 103 and rotated together. According to the lower limb exercise apparatus 100 having such a configuration, the initial position of the foot pad 101 can be adjusted by adjusting the angle of the support arm 102 without rotating the rotating body 103, and the extension and the reflection Can be switched, and the initial position of the foot pad 101 can be finely adjusted according to the athlete.

In addition, when performing training for extension operation or reflection operation of the knee joint, it is necessary to exercise with an appropriate load according to the flexion state of the knee joint. FIG. 6A is a diagram showing an optimum load curve A0 applied to the foot pad in the extension operation, and FIG. 6B is a diagram showing an optimum load curve A0 applied to the foot pad in the reflection operation. “Θ” in FIGS. 6A and 6B is a knee joint bending angle from a reference initial position (a state in which the knee joint is fully extended or bent at a substantially right angle) in each operation. “T” in FIGS. 6A and 6B is the optimum load (torque) applied to the foot pad. As shown in FIGS. 6 (a) and 6 (b), when the knee joint is fully extended or bent at a substantially right angle, the load applied to the foot pad is lowered and the knee joint is slightly bent. It is necessary to increase the load applied to the foot pad before turning right. In the conventional lower limb exercise apparatus 100, in order to realize the optimum load curve A0, the arc surface 103a of the rotating body 103 is not a perfect circle, and the load applied to the foot pad 101 is the optimum load curve A0. It is formed in an elliptical shape.
Special Table 2000-508554

  However, in the conventional lower limb exercise apparatus 100 described above, when setting the initial position of the foot pad 101, the arm 102 is rotated about the rotation shaft 107 while being separated from the rotating body 103, and the foot pad 101 is rotated. 101 is moved in a circular arc shape, so that the foot pad 101 is arranged at a position shifted from the reference initial position (position rotated from the reference initial position by a predetermined angle θ1, θ2), and the knee joint extension is extended from that position. When training for motion and reflection motion is performed, there is a problem that it is impossible to exercise with an appropriate load according to the flexion state of the knee joint. This is because the initial load applied to the foot pad 101 becomes the initial load at the reference initial position, and does not correspond to the actual flexion state of the knee joint, as shown in FIGS. 6 (a) and 6 (b). This is because the actual load curve A1 deviates from the optimum load curve A0. That is, even when the operation is started from a position shifted from the reference initial position, the load is applied in the same manner as when the operation is started from the reference initial position, and the load along the optimal load curve A0 is changed. It is because it does not become a way.

  The present invention takes the above-described conventional problems into consideration, and even when the initial position of the foot pad is adjusted, the knee joint is trained with an appropriate load according to the flexion state of the knee joint. It aims at providing the lower limb exercise equipment which can do.

According to the first aspect of the present invention, there is provided a seat portion for seating an exerciser, a foot pad that is disposed in front of the seat portion and moves in an arc shape when pressed by the lower leg of the exerciser, and the lower leg of the exerciser. Load introduction means for applying a load to the foot pad to be pushed, and the load introduction means extends by folding up and down a weight that is movable in the vertical direction and a rotary body that is rotatable in the vertical direction. And a circular arc surface around which the belt is wound by the rotation of the rotating body is formed on the rotating body, and the rotating shaft of the rotating body includes the rotating shaft. And a support arm that supports the foot pad is fixed. The foot pad is pushed by a lower limb of the athlete, the rotating body is rotated, and the arc surface Before A belt is wound, the belt is pulled, and the weight is lifted, so that a load is applied to the foot pad, and the arc surface is shaped so that the foot pad is loaded with an optimal load curve. In the formed lower limb exercise apparatus, a plurality of rollers each wound around a part of the belt between the weight and the rotating body and extending a part of the belt in a zigzag shape, and the plurality of rollers Roller position changing means for changing the position of at least one of the rollers, and by changing the position of the roller by the roller position changing means , the belt is loosened or pulled, and accordingly The rotating body is rotated to adjust the initial position of the foot pad .

  With such a feature, the end of the belt on the rotating body side is loosened or pulled by changing the position of the roller by the roller position changing means. When the belt is loosened, the rotating body rotates so as to wind the belt on the arc surface, and the belt is wound around the arc surface of the rotating body. On the other hand, when the belt is pulled while the belt is wound around the arc surface of the rotating body, the rotating body rotates so as to send out the belt wound around the arc surface. As described above, when the rotating body rotates in any direction, the rotating shaft rotates in the same direction, the support arm also rotates in the vertical direction around the rotating shaft, and the foot pad moves in an arc shape. Is done.

  According to a second aspect of the present invention, in the lower limb exercise apparatus according to the first aspect, the roller position changing means rotates a rotation holding body that holds the plurality of rollers in the vertical direction. .

  With such a feature, by rotating the rotary holder in the vertical direction, the position of the roller is changed, and the end of the belt on the rotary body side is loosened or tensioned.

  According to a third aspect of the present invention, in the lower limb exercise apparatus according to the first aspect, the roller position changing means linearly moves at least one of the plurality of rollers.

  With such a feature, by moving the roller linearly, the position of the roller is changed, and the end of the belt on the rotating body side is loosened or tensioned.

  According to a fourth aspect of the present invention, in the lower limb exercise apparatus according to the second aspect, the roller position changing means is provided with a worm gear mechanism having a self-locking function for rotating the rotation holding body, and the worm gear mechanism is The worm wheel is provided with a worm wheel provided on the rotation shaft of the rotary holder, and a worm meshed with the worm wheel.

  With such a feature, the rotation angle of the rotation holder can be adjusted steplessly by the worm gear mechanism. In addition, the self-locking function (self-holding function) of the worm gear mechanism can provide a state in which it cannot rotate from the output side (worm wheel side), and even if a force that tries to rotate the rotating holder for some reason works, The rotation of the rotation holder is restricted by the self-locking function of the worm gear mechanism.

  According to the lower limb exercise apparatus of the present invention, the end of the belt on the rotating body side is loosened or pulled by changing the position of the roller by the roller position changing means, whereby the rotating body is rotated and the foot pad is rotated. Since it is moved in an arc shape, the initial position of the foot pad can be adjusted as appropriate, and the initial angle of the knee joint during training can be adjusted. In addition, when the initial position of the foot pad is adjusted, the initial position of the foot pad changes and the belt is also wound around a predetermined arcuate surface accordingly. The knee joint can be trained with an appropriate load. For example, when the initial position is a state in which the knee joint is bent slightly, and the training of the flexion motion is performed from that state, the load at the initial position is the initial position as a reference (the position where the knee joint is straightened) ), The load is of a magnitude suitable for the actual state where the knee joint is slightly bent, and the load is applied according to the optimum load curve. In other words, regardless of the knee joint bending state, training starts at any position on the optimum load curve according to the knee joint flexion angle, and the load changes along the optimum load curve. In other words, a load suitable for the knee joint flexion state can always be applied to the foot pad.

  In addition, by using the roller position changing means that rotates the rotation holding body that holds the plurality of rollers in the vertical direction, the position of the roller is changed by rotating the rotation holding body in the vertical direction. Since the end is loosened or pulled, the above-described lower limb exercise apparatus can be realized with a simple configuration.

  Further, by using a roller position changing means that linearly moves at least one of the plurality of rollers, the position of the roller is changed by moving the roller linearly, and the end of the belt on the rotating body side is changed. Since it is loosened or pulled, the above-described lower limb exercise apparatus can be realized with a simple configuration.

  Further, the roller position changing means is provided with a worm gear mechanism having a self-locking function for rotating the rotation holding body, and this worm gear mechanism is meshed with a worm wheel provided on the rotation shaft of the rotation holding body and the worm wheel. With the configuration including the worm, the initial position of the foot pad can be finely adjusted, and the initial angle of the knee joint during training can be finely adjusted. In addition, the self-lock function prevents the worm gear mechanism from reversing below a predetermined torque, so that damage to the instrument can be prevented and safety can be improved.

  Hereinafter, first and second embodiments of the lower limb exercise apparatus according to the present invention will be described with reference to the drawings.

[First Embodiment]
First, a first embodiment of a lower limb exercise apparatus according to the present invention will be described.
FIG. 1 is a side view of the lower limb exercise device 1, and FIG. 2 is a front view of the lower limb exercise device 1. For convenience of explanation, the left side in FIG. 1 is the front, the right side is the rear, and the left and right sides in FIG. 2 are the sides.

  As shown in FIGS. 1 and 2, the lower limb exercise device 1 includes a base frame 2 placed on the floor, a side wall frame 3 erected on one side of the base frame 2, and a base frame 2. A seat 4 disposed on one side of the side wall frame 3, a foot pad 5 disposed in front of the seat 4, a thigh pad 6 disposed above the seat 4, and an athlete The load introduction means 7 applies a load to the foot pad 5 pushed by the lower limb, and the foot pad position adjustment means 8 adjusts the initial position of the foot pad 5.

The base frame 2 has a configuration in which long members made of steel pipes having a rectangular cross-sectional view are assembled in a frame shape.
The side wall frame 3 has a configuration in which long members made of steel pipes having a rectangular cross-sectional view are assembled in a frame shape and the outer surface thereof is closed with a side plate. Two parallel guide rods 9, 9 extending vertically are attached to the central portion of the side wall frame 3.

  The seat part 4 is a part for seating an exerciser, and is composed of a seat surface part 10 on which an exercising person's buttocks is placed and a backrest part 11 that supports the back of the exerciser. Further, the seat portion 4 includes a seat surface angle adjusting mechanism 12 that adjusts the inclination angle of the seat surface portion 10 by rotating the seat surface portion 10 in the vertical direction, and a position of the backrest portion 11 by moving the backrest portion 11 in the front-rear direction. And a backrest position adjusting mechanism 13 for adjusting. In addition, on both sides of the seat surface portion 10, grips 14 and 14 are provided for the exerciser to hold with hands.

  The foot pad 5 is a member that moves in an arc shape by being pushed by the lower limbs of the athlete, and two columnar members 16, 16 arranged in the left-right direction on a core member 15 that extends in the left-right direction. Each of the cylindrical members 16 and 16 is covered with cushioning materials 17 and 17 respectively.

  The thigh pad 6 is abutted against the upper surface of the thigh of the exerciser to prevent the thigh of the exerciser from rising, and the cushioning material 20 is attached to the surface (lower side) of the substrate 19. It has become. The thigh pad 6 can be adjusted in inclination angle and height, and can be moved from a position where the thigh pad 6 contacts the thigh to a position where the thigh pad 6 does not contact the thigh. Specifically, a cylindrical material 21 is attached to the back surface (upper side surface) of the substrate 19, and a round pipe 22 extending horizontally in the cylindrical material 21 causes one end to protrude out of the cylindrical material 21. Inserted. The cylindrical material 21 is rotatably inserted into the pipe 22, and the thigh pad 6 is rotatable in the vertical direction around the pipe 22. Further, the cylindrical member 21 is provided with fastening members 23 and 23 which are tightened in a bolt shape inside the cylindrical member 21, and the distal ends of the fastening members 23 and 23 are brought into contact with the pipe 22. The rotation of the thigh pad 6 is locked. Further, a rod 24 extending in the vertical direction is fixed to one end of the pipe 22, and an L-shaped support member 25 that supports the thigh pad 6 is formed by the pipe 22 and the rod 24. The rod member 24 is inserted into a cylindrical member 26 extending in the vertical direction so as to be able to rotate and put in and out. The support member 25 is rotatable in the horizontal direction and can be moved up and down. . The tubular member 26 is provided with a locking member 27 that is brought into contact with the rod member 24 and locks the rotation and insertion / extraction of the rod member 24. The tubular member 26 is fixed to a support frame 27 erected on the base frame 2 and is disposed on the side of the seat portion 4.

  The load introduction means 7 includes a weight 28 that is movable in the vertical direction and a rotating body (cam) 29 that is rotatable in the vertical direction, and is connected in a vine shape through a belt 30 that is folded up and down. In addition, arc surfaces 31a and 31b (shown in FIG. 3 to be described later) around which the belt 30 is wound by the rotation of the rotating body 29 are formed on the rotating body 29, and further, on the rotating shaft 32 of the rotating body 29, A support arm 33 that extends in a direction crossing the rotation shaft 32 and supports the foot pad 5 is fixed.

  The weights 28 are members for giving load resistance to the foot pad 5 and are plate-like metal blocks that are appropriately divided into masses, and a plurality of pieces are stacked in the vertical direction. Vertical weight holes (not shown) are respectively formed at both ends of the weights 28... And guide rods 9 and 9 are respectively penetrated through the vertical diameter holes. As a result, the weights 28 are guided by the guide rods 9 and 9 so as to be movable in the vertical direction.

  A vertical through hole (not shown) is also formed at the center of the weights 28, and a rod member 34 in which horizontal holes (not shown) are formed at a predetermined pitch is inserted into the vertical through hole. The upper end of the rod member 34 is fixed to one end portion of the belt 30 via a belt fixture 35. Further, a horizontal through hole 28a is also formed at the center of the side surface of the weight 28, and this horizontal through hole 28a is formed so as to intersect with a vertical through hole (not shown) through which the rod member 34 is inserted. The horizontal through holes 28a of the weights 28 and the horizontal holes (not shown) of the rod member 34 are aligned and communicated with each other. Then, a locking pin (not shown) is inserted through the horizontal through hole 28a of the predetermined weight 28, and further, the locking pin is inserted into a horizontal hole (not shown) of the rod member 34 at the back. The number of weights 28... Lifted by the belt 30 is determined, and the weight acting on the belt 30 is set.

  One of the two guide rods 9 and 9 is provided with an end stopper 36 for restricting the lifting of the weights 28. The end stopper 36 is attached to the guide rod 9 while being gripped, and the range of motion can be adjusted steplessly. Further, a horizontal hole 28b for attaching a rubber weight (not shown) is formed at the center of the side surface of the uppermost weight 28. Then, a rubber weight core material (not shown) is inserted into the horizontal hole 28b, and a rubber weight that is lighter than the weight 28 of the metal lump is attached to the uppermost weight 28, so that it can be lifted by the belt 30. The weight of the rubber weight is added to the weights 28, and the load applied to the foot pad 5 is set finely.

  FIG. 3 is a view of the rotating body 29 as seen from the outside (left side in FIG. 2). As shown in FIGS. 1, 2, and 3, the rotating body 29 is a fan-like plate that is provided so as to be rotatable in the vertical direction around a rotating shaft 32 extending in the left-right direction (lateral direction in FIG. 2). A rotary shaft 32 is rotatably inserted in a hole (not shown) formed at the rotation center position of the rotating body 29. The rotary shaft 32 is made of a rod-like rod material, and is rotatably attached to brackets 37 and 37 respectively attached to the side wall frame 3 and the support frame 27 and disposed on both sides of the rotary body 29. .

  The rotating body 29 is formed with a groove 38 into which the belt 30 is fitted from the substantially middle position of the arc-shaped outer peripheral surface toward the center of the rotating body 29. An opening 39 having a size larger than the width of the groove 38 is formed. A belt fixture 40 that fixes the other end of the belt 30 is provided in the opening 39.

  FIG. 4 is a side view showing the movement of the rotating body 29 in the extension operation training, and FIG. 5 is a side view showing the movement of the rotating body 29 in the flexion operation training. As shown in FIGS. 3, 4, and 5, arc surfaces 31 a and 31 b around which the belt 30 is wound by the rotation of the rotating body 29 are disposed on both sides of the belt 30 (groove 38). Are formed respectively. The circular arc surfaces 31a and 31b are formed in an elliptical arc shape so as to realize an optimum load application (load curve) for training of the extension / flection operation of the knee joint. Specifically, in the arc surface 31a on the front side (right side in FIG. 3), the load applied to the foot pad 5 has an optimum load curve A0 in the training of the extension operation as shown in FIG. 6 (a). It is formed in the shape of a horizontally long elliptical arc. On the other hand, in the rear circular arc surface 31b (left side in FIG. 3), the load applied to the foot pad 5 is the optimum load curve A0 in the training of the flexion operation as shown in FIG. 6B. Thus, it is formed in a vertically long elliptical arc shape. Further, as shown in FIG. 1, a plurality of locked holes 29 a arranged in an arc shape around the rotation center of the rotating body 29 are formed on the inner surface (right side in FIG. 2) of the rotating body 29. Is formed.

  As shown in FIGS. 1 and 2, a locking arm 41 is provided at the intermediate portion of the rotating shaft 32 so as to face the inner side of the rotating body 29 (the right side in FIG. 2). At the tip of 41, a locking member 42 made of a plunger fitted into any one of a plurality of locked holes 29a formed in the rotating body 29 is attached. When the locking member 42 is fitted into the locked holes 29a, the rotating body 29 and the rotating shaft 32 are rotated together and supported by the support arm 33 fixed to the rotating shaft 32. When the foot pad 5 is moved in an arc shape around the rotation shaft 32, the rotating body 29 is also rotated in the vertical direction together with the rotation shaft 32. In addition, the to-be-latched hole 29a ... formed in the rotator 29 has at least the foot pad 5 disposed at a position below the exerciser's knee (reference initial position during the extension operation) and the foot pad 5 for exercise. What is necessary is just to arrange | position at the front position (reference | standard initial position at the time of a reflection operation | movement) of a person's knee, Preferably, the foot pad 5 is the reference | standard initial position at the time of an extension operation | movement, and the reference | standard initial position at the time of a reflection operation | movement It is desirable that there is something to be arranged at an intermediate position.

  The support arm 33 that supports the foot pad 5 is attached to the inner end (right side in FIG. 2) of the rotation shaft 32. The support arm 33 is a rod member that extends in a direction orthogonal to the rotation shaft 32 and is formed in a crank shape. The support arm 33 can be rotated relative to the rotating body 29 by removing the locking member 42 from the locked holes 29a, so that the supporting arm 33 can be rotated without rotating the rotating body 29. It can be rotated.

  The base end portion of the support arm 33 is fixed to the rotary shaft 32, and a long hole 43 extending in the axial direction is formed at the distal end portion thereof. The end of the core material 15 of the foot pad 5 is inserted into the long hole 43, and the foot pad 5 is movable along the long hole 43 with respect to the support arm 33. In addition, a fixing tool 44 is provided at the end of the core member 15 to fix the foot pad 5 by sandwiching the support arm 33 from both sides, and the foot pad 5 movable along the long hole 43 is appropriately fixed at an arbitrary position. Is done.

  In addition, a counterweight 45 that balances between the foot pad 5 and the support arm 33 via the rotation shaft 32 is provided at the outer end (left side in FIG. 2) of the rotation shaft 32. The counterweight 45 has a configuration in which a cylindrical mass body 47 is provided at the tip of an arm 46 that extends in a direction orthogonal to the rotation shaft 32. The arm 46 that supports the mass body 47 extends in the direction opposite to the support arm 33 that supports the foot pad 5, and thus the balance is maintained between the foot pad 5 and the support arm 33. .

  The belt 30 is a flexible belt-like member having one end attached to the weights 28 and the other end attached to the rotating body 29. The belt 30 is folded up and down by fulcrum rollers 48, 48 disposed above the weights 28... And the rotating body 29 and attached to the upper part of the side wall frame 3.

As shown in FIGS. 3, 4, and 5, a pair of guide rollers 49 and 49 that guide the belt 30 are provided above the rotating body 29. The pair of guide rollers 49 and 49 are disposed close to each other, and are disposed on the front and rear of the belt 30 (on the left and right sides in FIG. 1) so as to sandwich the belt 30.
In addition, the pair of guide rollers 49 are rotatably supported in a housing 50 fixed to the side wall frame 3.

  As shown in FIGS. 1 and 2, the foot pad position adjusting means 8 for adjusting the initial position of the foot pad 5 is provided above the pair of guide rollers 49 and 49. The foot pad position adjusting means 8 changes the position of the pair of rollers 51a and 51b and the pair of rollers 51a and 51b that are respectively wound around a part of the belt 30 to extend a part of the belt 30 in a zigzag shape. And roller position changing means 52.

  The pair of rollers 51a and 51b fold back one belt 51a which folds the belt 30 extending downward from the fulcrum rollers 48 and 48 upward and the belt 30 which extends upward from the one roller 51a. The belt 30 is wound around the pair of rollers 51a and 51b in an S shape.

  7 is an enlarged side view of the foot pad position adjusting means 8 as seen from the inside (the right side in FIG. 2). FIG. 8 is a cross-sectional view of the foot pad position adjusting means 8. As shown in FIGS. 1, 7, and 8, the roller position changing means 52 rotates the rotation holding body 53 that holds the pair of rollers 51a and 51b in the vertical direction so that the positions of the pair of rollers 51a and 51b are adjusted. Specifically, the base 54 fixed to the side wall frame 3, the rotation holding body 53 rotatably attached to the base 54, and the rotatable rotation holding body 53 are placed at predetermined positions. The locking member 56 is configured to be locked, and the stopper 57 is configured to rotate the rotatable rotating holding body 53 within a certain range.

  The base 54 is a member having a configuration in which a cylindrical portion 59 having a cylindrical inner peripheral hole is protruded from a vertically arranged semicircular plate portion 58, and the cylindrical portion 59 is attached to the side wall frame 3. It is attached by being fitted into the formed hole 3a. The tube portion 59 is provided at the position of the center of the circle of the semicircular plate portion 58. Further, the plate portion 58 has a flat outer surface (left side in FIG. 2), a shape in which the center of the inner surface (right side in FIG. 2) is recessed in a semicircular shape, and the outer peripheral portion is the central portion. It is formed thicker. Further, a plurality of holes 54 a for inserting the locking members 56 are formed in the outer peripheral portion of the plate portion 58. The plurality of holes 54 a are arranged in an arc along the circumference of the plate portion 58.

  The rotation holding body 53 is installed between a pair of substantially semicircular plates 60 and 61 sandwiching the pair of rollers 51a and 51b from both sides, and the pair of opposed plates 60 and 61, and the pair of rollers 51a and 51b are respectively connected. The pivot members 62 and 62 are pivotally supported, and a cylindrical rotary shaft 55 is provided so as to protrude from the plate 60 on the base 54 side and pivotally attached to the cylindrical portion 59 of the base 54. The plate 60 on the base 54 side is disposed so as to face the recessed portion of the plate portion 58. The other plate 61 has a larger diameter than the plate 60 on the base 54 side, and the outer peripheral portion thereof faces the outer peripheral portion of the plate portion 58. The pivot members 62 and 62 are rotatably inserted through the pair of rollers 51a and 51b via bearings 63 and 63, respectively. The rotary shaft 55 is joined to the plate 60 on the base 54 side and is rotatably fitted in the cylindrical portion 59 of the base 54.

  FIG. 9 is an enlarged sectional view showing the locking member 56. As shown in FIGS. 7 and 9, the locking member 56 is attached to a position (outer peripheral portion) of the front-side plate 61 (opposite to the base 54 side) facing the hole 54 a of the base 54. , A member that is attached to the rotation holding body 53 and is fitted into any one of the plurality of holes 54 a... Formed in the base 54. Specifically, the pin 56b is a member that is taken in and out of the hole 54a of the base 54 by rotating or pushing and pulling the knob 56a, such as a plunger. When the pin 56b of the locking member 56 is inserted into the hole 54a of the base 54, the rotatable holding member 53 is locked, and the pair of rollers 51a and 51b are held at fixed positions.

  FIG. 10 is an enlarged cross-sectional view showing the stopper 57. As shown in FIGS. 7 and 10, the stopper 57 is a pin member protruding from the outer peripheral portion of the plate 60 on the base 54 side, and is in contact with the edge of the plate portion 58 of the base 54. A concave portion 58a into which the stopper 57 enters is formed in the plate portion 58 where the stopper 57 comes into contact. When the stopper 57 abuts on the plate portion 58, the rotation of the rotation holding body 53 is restricted, and the rotation holding body 53 cannot be rotated more than a certain amount. As a result, the movement range of the pair of rollers 51a and 51b is reduced. It is regulated.

Next, a method for using the lower limb exercise device 1 having the above-described configuration will be described.
First, the case of performing extension operation training will be described.

  First, as shown in FIGS. 1 and 2, the exerciser is seated on the seat 4. At this time, the inclination angle of the seat surface portion 10 is adjusted in advance according to the athlete by the seat surface angle adjustment mechanism 12, and the position of the backrest portion 11 is adjusted by the backrest position adjustment mechanism 13 according to the athlete. When the athlete is seated on the seat 4, the thigh pad 6 is moved to a position away from the athlete, and after the driver sits on the seat 4, the thigh pad 6 is placed on the driver's thigh. Place on top.

  When the athlete is seated on the seat 4, the foot pad 5 is placed at a position that does not interfere with the driver, for example, an initial position in the training of the flexion motion, and the driver is seated on the seat 4. After that, the foot pad 5 is brought into contact with the driver's lower limb. Specifically, when the athlete is seated on the seat 4, the locking member 42 attached to the tip of the locking arm 41 is inserted into the locked hole 29a on the rear side (right side in FIG. 1). Then, the foot pad 5 is placed in front of the exerciser's knee. Then, after the driver is seated on the seat portion 4, the locking member 42 is pulled out from the locked hole 29 a on the rear side, and the support arm 33 and the foot pad 5 (and the counterweight 45 are centered on the rotating shaft 32). ) Are integrally rotated, the locking member 42 is fitted into the locked hole 29a on the front side (left side in FIG. 1), and the foot pad 5 is disposed at a position below the knee of the exerciser. 5 is brought into contact with the driver's shin.

  At this time, as shown in FIG. 4A, the rotating body 29 is in a state in which the groove 38 formed in the rotating body 29 is directed between the pair of guide rollers 49, 49. It is not wound on either of the arcuate surfaces 31a and 31b on both sides, but extends substantially straight from the exit portion of the groove 38 toward the pair of guide rollers 49 and 49. Further, the locking member 56 of the roller position changing means 52 is fitted into a hole 54a at the upper end of the base 54, and the pair of rollers 51a and 51b of the foot pad position adjusting means 8 is one of the rollers 51a. The upper and lower rollers 51b are arranged below the other roller 51b.

Next, as shown in FIG. 11, the position of the foot pad 5 is finely adjusted by rotating the pair of rollers 51 a and 51 b by the roller position changing means 52, and the initial position of the foot pad 5 is set.
Specifically, when the initial position of the foot pad 5 is adjusted to the front side from the initial position of the foot pad 5, the locking member 56 of the roller position changing means 52 is pulled out, and the pair of rollers 51a and 51b are moved, for example, The pair of rollers 51a and 51b are rotated side by side and rotated up and down, and the locking member 56 is inserted into the holes 54a at predetermined positions among the holes 54a of the base 54. As a result, the belt 30 at the portion ahead of the roller 51b (rotating body 29 side) is loosened, and the rotating body 29 rotates clockwise in FIG. 1 while the belt 30 is wound around the arc surface 31a on the front side. As a result, the rotating shaft 32 integrated with the rotating body 29 is rotated in the same direction as the rotating body 29 by the locking member 56, and the foot pad 5 joined to the rotating shaft 32 via the support arm 33 is moved forward. Move in a circular arc toward

  Further, when the foot pad 5 moved toward the front side as described above is returned to the rear side to adjust the initial position of the foot pad 5, the locking member 56 of the roller position changing means 52 is attached to the hole 54a of the base 54. The pair of rollers 51a and 51b is rotated in the direction opposite to the above-described direction. As a result, the end of the belt 30 on the rotating body 29 side is pulled, and the rotating body 29 rotates counterclockwise in FIG. 1 while feeding the belt 30 wound around the arcuate surface 31a on the front side. As a result, the rotating shaft 32 integrated with the rotating body 29 rotates in the same direction as the rotating body 29, and the foot pad 5 joined to the rotating shaft 32 via the support arm 33 moves in an arc shape toward the rear side. To do.

  Next, an exerciser pushes up the foot pad 5 arranged at a predetermined initial position with the lower limbs, thereby performing an extension motion training of the knee joint. Specifically, as shown in FIG. 4A, when the athlete pushes up the foot pad 5 with his lower limbs, the rotation shaft 32 rotates counterclockwise in FIG. Similarly, the locked rotating body 29 rotates counterclockwise in FIG. As the rotating body 29 rotates, as shown in FIG. 4B, the belt 30 is wound around the arcuate surface 31a on the front side so as to wind up the belt 30, and the belt 30 is pulled. When the belt 30 is pulled, the weights 28 attached to the belt 30 are lifted, and a load is applied to the foot pad 5 moved in an arc shape by the weight of the weights 28.

Next, a case where training of the flexion operation is performed will be described.
First, the athlete is seated on the seat 4 in the same manner as in the extension operation described above. At this time, when the exerciser is seated on the seat portion 4, the foot pad 5 needs to be disposed at a position that does not interfere with the driver, but the foot pad 5 seats the exerciser on the seat portion 4. Prior to the movement, the locking member 42 is inserted into the locked hole 29a on the rear side (left side in FIG. 1) in advance to place the foot pad 5 in the front position of the athlete's knee (reference initial position in the flexion operation). Alternatively, after the driver is seated on the seat 4, the support arm 33 and the foot pad 5 are rotated integrally around the rotation shaft 32, and the foot pad 5 is subjected to a flexion operation. You may move to the reference initial position.

  At this time, as in the case of the extension operation described above, as shown in FIG. 5A, the rotating body 29 has a groove 38 formed in the rotating body 29 facing the pair of guide rollers 49, 49. The belt 30 is not wound on either of the arcuate surfaces 31a and 31b on both sides, and extends substantially straight from the exit portion of the groove 38 to the pair of guide rollers 49 and 49. Has been. Further, the locking member 56 of the roller position changing means 52 is fitted into a hole 54a at the upper end of the base 54, and the pair of rollers 51a and 51b of the foot pad position adjusting means 8 is one of the rollers 51a. The upper and lower rollers 51b are arranged below the other roller 51b.

  Next, as in the case of the extension operation described above, the position of the foot pad 5 is finely adjusted by rotating the pair of rollers 51a and 51b by the roller position changing means 52 as shown in FIG. 5 is set as the initial position. At this time, by rotating the pair of rollers 51a and 51b to, for example, a state in which they are arranged side by side or in a state in which the pair of rollers 51a and 51b is reversed up and down, the belt 30 on the rotating body 29 side is loosened and rotated. The body 29 rotates counterclockwise in FIG. 1 while the belt 30 is wound around the arcuate surface 31b on the rear side. As a result, the rotating shaft 32 integrated with the rotating body 29 is rotated by the locking member 56 in the same direction as the rotating body 29, and the foot pad 5 joined to the rotating shaft 32 via the support arm 33 is moved backward. Moves in a circular arc shape.

  Next, an exerciser pushes down the foot pad 5 arranged at a predetermined initial position with the lower limbs, so that the knee joint flexion motion is trained. Specifically, as shown in FIG. 5A, when the athlete pushes down the foot pad 5 with his lower limbs, the rotation shaft 32 rotates clockwise in FIG. 5, and the engagement member 56 engages the rotation shaft 32. The stopped rotating body 29 also rotates clockwise in FIG. As the rotating body 29 rotates, as shown in FIG. 5B, the belt 30 is wound around the arcuate surface 31a on the rear side so as to wind up the belt 30, and the belt 30 is pulled. When the belt 30 is pulled, the weights 28 attached to the belt 30 are lifted, and a load is applied to the foot pad 5 moved in an arc shape by the weight of the weights 28.

  According to the lower limb exercise device 1 having the above-described configuration, a pair of rollers 51a and 51b that are respectively wound around a part of the belt 30 to extend a part of the belt 30 in a zigzag shape, and a pair of rollers 51a and 51b. The position of the belt 30 on the rotating body 29 side is changed by changing the position of the pair of rollers 51a and 51b by the roller position changing means 52. The end is loosened or pulled. Accordingly, the rotating body 29 is rotated and the foot pad 5 is moved in an arc shape, the initial position of the foot pad 5 can be adjusted as appropriate, and the initial angle of the knee joint during training can be adjusted. .

  Further, when the initial position of the foot pad 5 is adjusted, the initial position of the foot pad 5 is changed and the belt 30 is also wound around the predetermined arcuate surfaces 31a and 31b accordingly. The knee joint can be trained with an appropriate load according to the flexion state of the joint. For example, when the extension position is trained from the initial position when the lower limb is slightly raised, the load at the initial position is the reference initial position (the position where the knee joint is bent at a substantially right angle). However, the load is of a magnitude suitable for the actual state where the lower limbs are slightly raised, and the load is applied as shown in the optimum load curve A0 shown in FIG. On the other hand, when the initial position is a state in which the knee joint is slightly bent, and the training of the flexion motion is performed from that state, the load at the initial position is the initial position as a reference (the position where the knee joint is straightened). ), And a load having a magnitude suitable for an actual state in which the knee joint is slightly bent, and the load is applied as shown in an optimal load curve A0 shown in FIG. In other words, regardless of the knee joint flexion state, training is started at any position on the optimum load curve A0 corresponding to the knee joint flexion angle, and the load is applied along the optimum load curve A0. Therefore, the foot pad 5 can always be applied with a load suitable for the bending state of the knee joint.

  Further, since the rotation holding body 53 that respectively holds the pair of rollers 51a and 51b is provided with roller position changing means 52 that rotates in the vertical direction, the rotation holding body 53 is rotated in the vertical direction. The positions of the pair of rollers 51a and 51b are changed, and the end of the belt 30 on the rotating body 29 side is loosened or pulled. Thereby, the above-described lower limb exercise apparatus 1 can be realized with a simple configuration.

  Further, the support arm 33 is attached so as to be relatively rotatable with the rotating body 29, and the rotating body 29 is formed with arc surfaces 31 a and 31 b on both sides of the belt 30. Therefore, by rotating the support arm 33 without rotating the rotating body 29, the initial position of the foot pad 5 can be switched, and at this time, the rotating body 29 is rotated in any direction. Even if it exists, the belt 30 is wound around the circular arc surfaces 31a and 31b, and an appropriate load is applied to the foot pad 5. Thus, the extension operation and the reflection operation can be switched only by switching the angle of the support arm 33, and both trainings can be performed with an appropriate load.

[Second Embodiment]
Next, a second embodiment of the lower limb exercise apparatus according to the present invention will be described. Note that the description of the same configuration as that of the first embodiment described above is omitted, and the same reference numerals are given to the same components as those of the first embodiment.

12 is a side view of the roller position changing means 52 ′ viewed from the inside, FIG. 13 is a side view of the roller position changing means 52 ′ viewed from the outside, and FIG. 14 is a cross-sectional view taken along the line XX shown in FIG. FIG. 15 is a cross-sectional view taken along the line Y-Y shown in FIG.
As shown in FIGS. 12, 13, 14, and 15, the roller position changing means 52 ′ includes a rotation holding body 53 ′ that holds a pair of rollers 51a and 51b, and a worm gear that rotates the rotation holding body 53 ′. It comprises a mechanism 64, a knob 65 for driving the worm gear mechanism 64, and a worm bracket 66 attached to the side wall frame 3.

  The rotation holding body 53 ′ is provided between a pair of circular plates 60 ′ and 61 ′ sandwiching the pair of rollers 51a and 51b from both sides, and a pair of opposed plates 60 ′ and 61 ′. Each of the pivot members 62 and 62 pivotally supports 51b and a columnar rotary shaft 55 'projecting from the side wall frame 3 side (outside) plate 60'. The rotation shaft 55 ′ is joined to the center position of the plate 60 on the side wall frame 3 side, and is inserted into the tube portion 59 attached to the side wall frame 3 so as to be rotatably fitted in the tube portion 59. . The cylinder portion 59 is fitted in a hole 3 a formed in the side wall frame 3.

  The worm gear mechanism 64 includes a worm wheel 67 provided on the rotation shaft 55 ′ of the rotation holder 53 ′ and a worm 68 meshed with the worm wheel 67. The worm wheel 67 is a disc-shaped gear having an outer peripheral surface formed with uneven teeth 67 a, and is disposed outside the side wall frame 3. The worm wheel 67 is attached to the outer end of the rotation shaft 55 ′ protruding outward from the side wall frame 3 (the end opposite to the rotation holding body 53 ′), and when the worm wheel 67 rotates, the rotation shaft 55 ′. The rotation holding body 53 ′ rotates by rotating the shaft. The worm 68 is a male screw-like member that is rotatably held by the worm bracket 66, and thread-like worm teeth 68a extending in a spiral manner are formed on the outer peripheral surface thereof. The worm gear mechanism 64 is configured such that power is transmitted from the worm 68 to the worm wheel 67 by the sliding contact between the worm teeth 67a of the worm wheel 67 and the worm teeth 68a of the worm 68. The worm wheel 67 meshed with the worm 68 rotates.

  The worm gear mechanism 64 has a self-locking function (self-holding function). This self-locking function enables only power transmission from the worm 68 to the worm wheel 67, that is, it can be driven only from the worm 68, and from the output side (worm wheel 67 side) if it is below a predetermined torque. This function makes it impossible to rotate. According to this self-locking function, even if the worm wheel 67 tries to rotate at a predetermined torque or less, the worm gear mechanism 64 is locked and the rotation of the worm wheel 67 is restricted. The self-locking function described above decreases in efficiency when the advance angle of the worm 68 is reduced, and may be reversed from the output side due to load change or vibration. Therefore, the reduction ratio of the worm gear mechanism 64 is preferably set in the range of 1/40 to 1/60.

The knob 65 is for rotating the worm 68 and is attached to the upper end of the shaft 69 of the worm 68. When the knob 65 is rotated, the shaft 69 rotates and the worm 68 rotates.
Reference numeral 70 denotes a cover that covers the worm gear mechanism 64, and the cover 70 is omitted in FIG.

  According to the lower limb exercise device having the roller position changing means 52 ′ having the above-described configuration, the rotation angle of the rotation holding body 53 ′ can be adjusted steplessly by the worm gear mechanism 64. That is, for example, in the roller position changing means 52 in the first embodiment described above, since the pin 56b is inserted and locked in any one of the holes 54a ... formed in the base 54, Although the rotation angle of the rotation holder 53 'can be adjusted only at the pitch interval of the holes 54a ..., the roller position changing means 52' configured as described above allows continuous stepless adjustment. The rotation angle can be finely adjusted. As a result, the initial position of the foot pad 5 can be finely adjusted, and the initial angle of the knee joint during training can be finely adjusted.

In addition, the self-locking function of the worm gear mechanism 64 makes it possible to obtain a state in which the rotation cannot be performed from the output side (worm wheel 67 side). The rotation of the rotation holder 53 'is restricted by the self-locking function.
For example, in the roller position changing means 52 in the first embodiment described above, the pin 56b is inserted into and locked in any one of the holes 54a ... formed in the base 54. If the pin 56b is pulled out when the belt 30 is in a tensioned state due to an unforeseen situation, the belt 30 is pulled and the rotation holder 53 rotates rapidly. In this case, the device may be damaged, and there is a risk of harm to the person who has pulled out the pin 56b or the person sitting on the lower limb exercise device, so when using the lower limb exercise device, the belt 30 It is necessary to pay considerable attention so that the pin 56b is not pulled out when tension is applied.
On the other hand, in the roller position changing means 52 ′ provided with the worm gear mechanism 64 with the self-locking function, the worm gear mechanism 64 does not reverse at a predetermined torque or less, so that the instrument can be prevented from being damaged. Safety can be improved.

  As mentioned above, although embodiment of the lower limb exercise | movement apparatus which concerns on this invention was described, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning, it can change suitably. For example, in the above-described embodiment, the roller position changing unit 52 that rotates the rotation holding body 53 that holds the pair of rollers 51a and 51b in the vertical direction is provided. As shown in FIG. 16, a roller position changing means 52 "for linearly moving one of the pair of rollers 51a and 51b may be provided. Mechanism for linearly moving the one roller 51a For example, there is a mechanism in which a runner (not shown) is fitted to a guide rail (not shown) formed linearly and a roller 51a is attached to the runner, or the roller 51a is attached to the tip of a piston of a cylinder (not shown). A mechanism that moves the roller 51a can be appropriately applied as a mechanism that moves the roller 51a. Not only the roller 51a in the case of linear movement, a plurality of rollers to be respectively moved linearly.

  In the embodiment described above, a pair (two) of rollers 51a and 51b are provided. However, the present invention may be configured to include three or more rollers. The number of rollers can be changed as appropriate.

  In the above-described embodiment, the rotation holding body 53 that holds the pair of rollers 51a and 51b is manually rotated, and the locking member 56 is fitted into the hole 54 of the base 54 at a predetermined position. However, the present invention may be configured to rotate the rotation holding body 53 with a motor or the like, or may be configured by a mechanism including a rack and a pinion or a mechanism including a gear and a belt. The structure which rotates a rotation holding body may be sufficient, and the means to rotate a rotation holding body can be changed suitably.

  In the above-described embodiment, the support arm 33 is attached so as to be relatively rotatable with the rotating body 29 so that both the extension operation and the flexion operation can be performed. In the present invention, arc surfaces 31a and 31b are formed on both sides of the belt 30, respectively, but the present invention is a lower limb exercise apparatus that performs training of only one of the extension operation and the flexion operation. In this case, the rotating body, the rotating shaft, the support arm, and the foot pad are integrally formed, and only one of the circular arc surfaces is formed on the rotating body.

  Further, in the above-described embodiment, other configurations may be adopted for the structure and material of each part of the lower limb exercise device 1 without departing from the gist of the present invention, and the present invention has the above-described configuration. Other configurations may be combined as appropriate.

It is a side view for demonstrating 1st Embodiment of the lower limb exercise | movement apparatus which concerns on this invention. It is a front view for demonstrating 1st Embodiment of the leg exercise device which concerns on this invention. It is a side view of the rotary body for demonstrating 1st Embodiment of the leg exercise device which concerns on this invention. It is a figure showing operation | movement of the rotary body at the time of training of the extension operation | movement for demonstrating 1st Embodiment of the leg exercise device which concerns on this invention. It is a figure showing operation | movement of the rotary body at the time of training of the flexion operation | movement for demonstrating 1st Embodiment of the lower limb exercise | movement apparatus which concerns on this invention. It is a figure showing the optimal load curve of the foot pad for demonstrating 1st Embodiment of the leg exercise device which concerns on this invention. It is a side view showing the roller for describing 1st Embodiment of the lower limb exercise | movement apparatus which concerns on this invention, and a roller position change means. It is sectional drawing showing the roller and roller position change means for describing 1st Embodiment of the leg exercise device which concerns on this invention. It is a partial detail drawing of the roller position change means for demonstrating 1st Embodiment of the leg exercise device which concerns on this invention. It is a partial detail drawing of the roller position change means for demonstrating 1st Embodiment of the leg exercise device which concerns on this invention. It is a side view showing a motion of a roller and roller position change means for explaining a 1st embodiment of a lower limb exercise device concerning the present invention. It is a side view showing the roller position change means for demonstrating 2nd Embodiment of the leg exercise device which concerns on this invention. It is a side view showing the roller position change means for demonstrating 2nd Embodiment of the leg exercise device which concerns on this invention. It is sectional drawing showing the roller position change means for demonstrating 2nd Embodiment of the leg exercise device which concerns on this invention. It is sectional drawing showing the roller position change means for demonstrating 2nd Embodiment of the leg exercise device which concerns on this invention. It is a side view for demonstrating other embodiment of the leg exercise device which concerns on this invention. It is a side view for demonstrating the conventional leg exercising device.

Explanation of symbols

4 Seat portion 5 Foot pad 7 Load introducing means 28 Weight 29 Rotating body 30 Belt 31a, 31b Arc surface 32 Rotating shaft 33 Support arms 51a, 51b Rollers 52, 52 ', 52 "Roller position changing means 53, 53' Rotating holding body 55 'Rotating shaft 64 Worm gear mechanism 67 Worm wheel 68 Worm

Claims (4)

A load is applied to a seat for sitting an athlete, a foot pad that is arranged in front of the seat and moves in an arc when pressed by the lower leg of the athlete, and the foot pad pressed by the lower leg of the athlete Load introduction means for providing,
In the load introducing means, a weight that is movable in the vertical direction and a rotary body that is rotatable in the vertical direction are connected in a squirrel well shape through a belt that is folded up and down and extends. Further, an arc surface on which the belt is wound by the rotation of the rotating body is formed, and further, a support arm that extends on a rotating shaft of the rotating body in a direction intersecting the rotating shaft and supports the foot pad. Consists of a fixed configuration,
The foot pad is pushed by the lower limbs of the athlete, the rotating body is rotated, the belt is wound around the arc surface, the belt is pulled, and the weight is lifted, so that the foot pad is lifted. In the lower extremity exercise apparatus in which a load is applied and the arc surface is formed in a shape such that the foot pad is loaded with an optimal load curve,
A plurality of rollers which are respectively wound around a part of the belt between the weight and the rotating body so as to extend a part of the belt in a zigzag shape, and positions of at least one of the plurality of rollers Roller position changing means for changing
By changing the position of the roller by the roller position changing means, the belt is loosened or pulled, and the rotating body is rotated in accordance with this to adjust the initial position of the foot pad. Lower limb exercise equipment. The lower limb exercise apparatus according to claim 1,
The lower limb exercise device, wherein the roller position changing means rotates a rotation holding body that holds each of the plurality of rollers in a vertical direction. The lower limb exercise apparatus according to claim 1,
The lower limb exercise device, wherein the roller position changing means moves at least one of the plurality of rollers linearly. The lower limb exercise device according to claim 2,
The roller position changing means is provided with a worm gear mechanism having a self-locking function for rotating the rotation holding body,
The lower limb exercise device is characterized in that the worm gear mechanism includes a worm wheel provided on a rotation shaft of the rotation holder and a worm meshed with the worm wheel.

Images