JP6188253B2 - Walking machine - Google Patents

Description

  The present invention relates to a walking machine that can be walked by alternately moving a pair of legs.

  2. Description of the Related Art Conventionally, a walking machine that does not require a driving source such as a motor and can move passively by alternately moving a pair of legs is known. 2. Description of the Related Art In recent years, pedestrians capable of transporting luggage by being pushed and supported by a user using the walking principle of such walker have been developed (for example, Patent Document 1).

  The walking machine includes a thigh, a crus, and a knee joint that connects the thigh and the crus. The knee joint is configured to be able to take a state where the thigh and the lower leg are bent and a state where the thigh and the lower leg are extended.

  For this reason, when the walker is standing upright with the knee joint portion extended, the weight of the walker, the load applied by the user to the walker, and the like act on the knee joint portion. Thereby, in a knee joint part, a thigh part and a leg part rotate relatively, and it becomes easy to produce buckling.

JP 2011-131777 A

  An object of the present invention is to provide a walker capable of suppressing careless buckling of a knee joint.

In order to solve the above-described problem, according to the first aspect of the present invention, there is provided a walking machine that can be walked by alternately moving a pair of legs. The leg part connects the thigh part supported swingably with respect to the waist axis, the crus part having a landing part that can land on the ground, and the thigh part and the crus part so as to be able to bend and stretch. A knee joint part, and a rotation restricting part capable of restricting a bending motion of the knee joint part in a state where the landing part has landed on the landing surface . The rotation restricting portion restricts the bending motion of the knee joint when the landing portion lands on the ground, while allowing the bending motion of the knee joint when the landing state is canceled, It is possible to move along the crus between a first engaging portion provided on the first engaging portion, an engaging position engageable with the first engaging portion, and a retracted position retracted from the first engaging portion. A second engaging portion, and when the landing portion has landed on the landing surface, the second engaging portion is moved from the retracted position to the engaging position and engaged with the first engaging portion. Regulates the bending motion of the knee joint.

  According to the above-described configuration, when the landing part of the lower leg part lands on the landing during walking in which the walking device is walked by alternately moving the paired leg parts, the rotation restricting part restricts the buckling of the knee joint part. . That is, the rotation restricting portion restricts the buckling of the knee joint portion caused by the relative rotation between the thigh and the crus against the own weight acting on the knee joint. Therefore, when the user uses the walking machine, careless buckling of the knee joint can be suppressed.

In addition, the knee joint portion can be bent at the leg portion of the pair of leg portions whose landing state has been eliminated. Therefore, the bending motion of the knee joint can be restricted or allowed as necessary.

Moreover, the second engaging portion is engaged with the first engaging portion of the thigh by the landing portion landing on the landing surface and the second engaging portion being disposed at the engaging position. The bending motion of the knee joint is restricted. With such a simple configuration, buckling of the knee joint can be suppressed.

  In the walker, the landing portion includes a landing portion main body, a first position where the second engagement portion is disposed at the engagement position, and a second position where the second engagement portion is not disposed at the engagement position. And a rotating member that is rotatably supported with respect to the landing portion main body, the rotating member from the second position to the first when the rotating member lands on the ground. It is desirable to move to a position.

  According to the above configuration, the rotating member moves from the second position to the first position by landing and rotating on the landing surface. Then, the second engagement portion is disposed at the engagement position. At this time, the rotating member rotates due to a moment generated regardless of the direction of the force received from the landing when the rotating member lands. On the other hand, when a linear motion member that moves linearly between the first position and the second position is used instead of the rotation member, depending on the direction of the force received from the landing when the linear motion member lands. This makes it difficult to move the linear motion member from the second position to the first position. In this regard, according to the walking machine configured as described above, the rotating member rotates stably, and thus the second engaging portion can be smoothly moved from the retracted position to the engaging position.

  In the walker, the rotation restricting unit further includes an urging member, and the urging force of the urging member acts on the rotating member to move the rotating member from the first position to the second position. It is desirable to do.

According to the above configuration, the rotating member can be stably moved from the first position to the second position as compared with the case where the rotating member moves from the first position to the second position only by its own weight. .
In the above walker, it is desirable that a support portion capable of supporting the upper body of the user is provided on the waist axis. Furthermore, the support part has a chest support part that can support the user's chest, and a pair of arm support parts that are respectively arranged on both sides of the chest support part and can support both arms of the user. Is desirable.

According to the said structure, the walker which can suppress the buckling of a knee joint part can be used as a walker for performing walking training in the state which supported the user's upper body.
In the above walker, it is desirable that the waist shaft is provided with a handle used by the user to operate the walker and a loading platform on which luggage is placed.

  According to the above configuration, a walker that can suppress buckling of the knee joint can be used as a walker for carrying goods.

The perspective view which shows schematic structure of the walking machine of this invention. (A) is a side view showing a leg part away from the floor surface of a pair of leg parts, (b) is a partial side view showing an enlarged vicinity of the landing part, and (c) is enlarged near the knee joint part. FIG. (A) is a side view showing a user using a walker, (b) is a partial side view showing an enlarged vicinity of a landing part, and (c) is a partial side view showing an enlarged vicinity of a knee joint part. . The side view which shows a mode that a user uses the walking machine of a modification.

Hereinafter, an embodiment of a walking machine will be described with reference to the drawings.
As shown in FIG. 1, the walking machine 10 includes a waist shaft 11, a pair of leg portions 12, and a support portion 13 that supports the upper body of the user. The pair of leg portions 12 are aligned in the axial direction of the waist shaft 11 and connected to the waist shaft 11. The leg 12 includes a thigh 21, a crus 23, a knee joint 24, and a rotation restricting unit 25. The thigh 21 is supported so as to be swingable with respect to the waist axis 11. The lower leg portion 23 has a landing portion 22 that lands on a floor surface FL (see FIG. 3) as a landing surface. The knee joint 24 connects the thigh 21 and the crus 23 so as to bend and stretch. The rotation restricting portion 25 restricts the bending motion of the knee joint portion 24 in a state where the landing portion 22 has landed on the floor surface FL.

  As shown in FIGS. 1 and 2A, the thigh 21 is formed in a substantially columnar shape. An insertion hole 31 is formed at the upper end of the thigh 21, and a communication hole 32 is formed at the lower end of the thigh 21. The insertion hole 31 and the communication hole 32 penetrate the thigh 21 in the width direction orthogonal to the longitudinal direction. By inserting the waist shaft 11 through the insertion hole 31, the thigh 21 is supported with respect to the waist shaft 11 so as to be swingable about the axis of the waist shaft 11.

  As shown in FIG. 2C, a contact portion 33 having a contact surface 33 a is provided at the lower end of the thigh 21. The contact surface 33 a is orthogonal to the longitudinal direction of the thigh 21. The contact portion 33 is disposed with the contact surface 33 a facing the lower leg portion 23 and protrudes in the traveling direction of the walking machine 10.

  As shown in FIG. 1 and FIG. 2A, the crus 23 is formed in a substantially columnar shape like the thigh 21. A through hole 34 and a contact portion 35 are provided at the upper end of the crus 23. The through hole 34 penetrates the crus 23 in the width direction orthogonal to the longitudinal direction. The contact portion 35 has a contact surface 35 a orthogonal to the longitudinal direction of the crus 23. The contact portion 35 is disposed with the contact surface 35 a facing the thigh 21, and protrudes in the traveling direction of the walking machine 10.

  As shown in FIGS. 1 to 2C, a landing portion 22 that is landed on the floor surface FL when the walking device 10 is walked is formed at the lower end of the crus portion 23. The floor surface FL is a road surface on which the walking machine 10 walks, and includes not only a smooth paved road surface but also a non-paved road surface having irregularities. The floor surface FL is not limited to a flat road, and may be a downhill road. Hereinafter, the end portion (left end in FIG. 2A) facing the traveling direction of the walking machine 10 in the landing portion 22 is referred to as “toe”, and the end opposite to the “toe” (right end in FIG. 2B). Is described as “踵”.

  As shown in FIGS. 2A and 2B, the landing portion 22 includes a foot portion 36 as a landing portion main body, a rotating member 37 that is rotatably supported with respect to the foot portion 36, and the rotating member 37. And a pin 38 that supports the foot portion 36. The foot portion 36 is formed in a substantially semi-cylindrical shape in a side view. The surface of the foot portion 36 facing the floor surface FL is a circular arc surface 36a having a convex curved surface shape. A support hole 39 is formed in the vicinity of the arc surface 36a of the foot portion 36 and in the center between the toe and the heel. The support hole 39 penetrates the foot portion 36 in the width direction. The penetration direction of the support hole 39 is the same as the axial direction of the communication hole 34.

  The rotating member 37 has an arc portion 41, a bent portion 42, and a fixed portion 43. The arc portion 41 is formed by bending a belt-like plate piece having substantially the same width as the arc surface 36a into an arc shape along the arc surface 36a. The bent portion 42 is formed in a straight line by bending one of both ends of the arc portion 41 in the vicinity of the heel. The fixed portion 43 is formed by bending the other of the ends of the arc portion 41 from the outside in the width direction to the inside.

  The arc portion 41 has a length corresponding to the arc surface 36a from the support hole 39 to the flange. A long hole 44 extending along the bent portion 42 is formed in the bent portion 42. The long hole 44 penetrates the bent portion 42 in the thickness direction. A support hole 45 penetrating the fixing portion 43 is formed in the fixing portion 43. By inserting the pin 38 through the support hole 45 and the support hole 39, the rotating member 37 is supported by the foot portion 36 so as to be rotatable around the pin 38. In the present embodiment, the position of the rotating member 37 shown in FIG. 2B is referred to as a second position. The second position is a position at which the rotating member 37 of the leg 12 that has not landed on the floor surface FL is disposed.

  As shown in FIG. 1, the knee joint portion 24 includes a communication hole 32 shown in FIG. 2A, a communication hole 34, and a connecting shaft 46 that is inserted through both the communication holes 32 and 34. Specifically, the knee joint portion 24 sandwiches the lower end of the thigh 21 from the axial direction of the connection shaft 46 by the upper end of the crus 23 and inserts the connection shaft 46 into the communication holes 32 and 34. It is configured. Thereby, in the knee joint part 24, the thigh part 21 and the crus part 23 are connected so that relative rotation is possible centering | focusing on the connection shaft 46. FIG. The axial direction of the connecting shaft 46 is the same as the axial direction of the waist shaft 11.

  The angle at which the thigh 21 and the crus 23 can rotate relative to each other is restricted to a certain angle. Specifically, as shown in FIG. 2 (c), the abutment surface 33a and the abutment surface 35a come into contact with each other, so that the lower leg part with respect to the thigh 21 from the stretched state of the knee joint part 24 is obtained. It is restricted that 23 rotates in the advancing direction. As described above, the range in which the thigh 21 and the crus 23 can be rotated relative to each other is within a certain angle in the state shown in FIG. It is limited to a range between the state rotated by (for example, 30 degrees). The fixed angle can be arbitrarily changed when the walking machine 10 is designed.

Next, the rotation restricting portion 25 provided in the leg portion 12 will be described.
As shown in FIGS. 2A to 2C, the rotation restricting portion 25 extends along the insertion portion 51 as the first engaging portion provided in the thigh 21 and the crus 23. And a rod 52 as a second engaging portion. The rotation restricting portion 25 further includes a guide portion 53 that supports the rod 52 from a direction orthogonal to the rod 52. The rotation restricting portion 25 includes a compression spring 54 and a spring seat 55 for arranging the compression spring 54 on the rod 52. The compression spring 54 indirectly biases the rod 52 along its longitudinal direction.

  The insertion portion 51 is provided at the lower end of the thigh 21 and protrudes on the opposite side to the traveling direction. An engagement hole 56 extending in the longitudinal direction of the thigh 21 is formed in the insertion portion 51. A rod 52 having a circular cross section is inserted into the engagement hole 56. The engagement hole 56 has a tapered different diameter portion 56a and a constant diameter portion 56b. The inner diameter of the different-diameter portion 56a gradually decreases toward the inner depth of the engagement hole 56. The inner diameter of the constant diameter portion 56b is the same as the inner diameter of the end portion on the small diameter side of the different diameter portion 56a. The inner diameter of the constant diameter portion 56 b is slightly larger than the outer diameter of the rod 52. For this reason, when the rod 52 is inserted into the constant diameter portion 56b, the movement of the rod 52 in the direction orthogonal to the rod 52 is restricted. The rod 52 is preferably formed of a highly rigid material such as a metal material.

  A threaded portion 57 is formed at the lower end of the rod 52. Two guide portions 53 are provided on the crus portion 23 on the side opposite to the traveling direction. The two guide parts 53 are formed at intervals in the longitudinal direction of the crus part 23. A guide hole 58 that penetrates the guide portion 53 is formed in the guide portion 53. The guide hole 58 extends along the longitudinal direction of the crus 23. The rod 52 slides with the inner peripheral surface of the guide hole 58 while being inserted into the guide hole 58. Thereby, the rod 52 reciprocates along the longitudinal direction of the crus 23. Further, the rod 52 is supported by the guide portion 53 in a state where the screw portion 57 is inserted into the long hole 44 of the bent portion 42. A double nut 59 is fixed to the tip of the screw portion 57. Thereby, the rod 52 is supported with respect to the bent portion 42 so as not to be detached from the long hole 44. The rod 52 is movable along the crus 23 according to the rotational displacement of the rotating member 37. Further, the rod 52 can slide along the long hole 44 according to the rotational displacement of the rotating member 37.

  In the leg portion 12 shown in FIG. 2C, the position of the rod 52 is a retracted position that is not inserted into the insertion portion 51. In this case, relative rotation between the thigh 21 and the crus 23 is allowed, and the knee joint 24 can be bent.

  As shown in FIG. 2B, the compression spring 54 is a compression coil spring. The inner diameter of the compression spring 54 is larger than the outer diameter of the rod 52. The compression spring 54 is disposed between the guide portion 53 and the bent portion 42 while being inserted through the rod 52 together with the spring seat 55. The compression spring 54 compresses between the guide portion 53 and the bent portion 42 according to the rotational displacement of the rotating member 37, or rotationally displaces the rotating member 37 with a restoring force according to the amount of compression.

  As shown in FIG. 1, the support portion 13 includes a chest support portion 61 that can support a user's chest and an arm support portion 62 that can support both arms of the user. One arm support portion 62 is disposed on each side of the chest support portion 61. The arm support part 62 has a gripping part 63 that is gripped by the user's hand and a placement part 64 on which the user's forearm and elbow are placed. The chest support portion 61 is made of a material that can reduce impact. The support part 13 is comprised so that support of the upper body of the user of the walking machine 10 is possible.

Next, the effect | action of the walking machine 10 of this embodiment is demonstrated.
As shown in FIG. 3A, when using the walking machine 10, the user holds the gripping portion 63 while placing the chest on the chest support portion 61 and placing the forearm, elbow, etc. on the placement portion 64. . In this way, the user can deposit his / her weight in the walking machine 10. For this reason, the load to a leg part can be reduced compared with the case where the walking machine 10 is not used. In addition, the user can deposit his / her body weight alternately on each leg 12 via the chest support 61 and the arm support 62. Thus, the user can walk using the walker 10 by walking the walker 10.

  When walking the walker 10, the user tilts the walker 10 so that the other leg 12 is separated from the floor surface FL by depositing weight on one leg 12. Then, one leg 12 becomes a support leg that lands on the floor surface FL, and the other leg 12 becomes a free leg away from the floor surface FL. And the other leg part 12 used as the free leg is rotated to the advancing direction centering on the waist axis 11, and is made to land on the floor surface FL.

  The other leg 12 that was the free leg becomes a support leg by landing on the floor surface FL, and the one leg 12 that was the support leg becomes a free leg by leaving the floor surface FL. In this way, the walking machine 10 can be walked by moving the paired leg portions 12 alternately. The user can perform walking training by walking in accordance with the walking of the walking machine 10.

  Further, when the walking machine 10 is walked, the leg portion 12 serving as a support leg has a relative angle between the thigh 21 and the lower leg 23 of approximately 180 degrees, and the longitudinal directions of the thigh 21 and the lower leg 23. Are arranged in a state of matching. Here, a compressive load due to the weight of the user or the weight of the walking machine 10 acts in the longitudinal direction of the leg 12 on the leg 12 serving as a support leg.

  As shown in FIG. 3A, when the landing portion 22 of the leg portion 12 which becomes the supporting leg from the free leg lands on the floor surface FL, the rotating member 37 of the landing portion 22 generates a reaction force from the floor surface FL. receive. Therefore, the rotating member 37 rotates around the pin 38 and moves from the second position shown in FIG. 2B to the first position shown in FIG. Then, the bent portion 42 of the rotating member 37 approaches the guide portion 53 of the crus 23. Thereby, the rod 52 supported by the bending part 42 moves along the lower leg part 23 toward the thigh part 21. In addition, since the rotation member 37 is disposed at the first position, the compression spring 54 inserted through the rod 52 is compressed by the bent portion 42 and the guide portion 53.

  As shown in FIG. 3C, the rotating member 37 rotates and moves toward the thigh 21 of the rod 52, whereby the tip of the rod 52 is inserted into the insertion portion 51. Specifically, the tip of the rod 52 is guided to the constant diameter portion 56b by the different diameter portion 56a and inserted into the constant diameter portion 56b. In this way, the rod 52 is inserted into the insertion portion 51, thereby being disposed at the engagement position engaged with the insertion portion 51. The first position of the rotating member 37 shown in FIG. 3C is a position that can be taken by the rotating member 37 of the leg portion 12 serving as a support leg, and is also a position where the rod 52 can be arranged at the engaging position. Further, in the state shown in FIG. 3C, since the rod 52 is inserted into the insertion portion 51, the relative rotation between the thigh 21 and the crus 23 is restricted, and the knee joint 24 is bent. It is impossible.

  Thus, when the rod 52 is disposed at the engagement position, the rotation restricting portion 25 restricts the relative rotation of the thigh 21 and the crus 23. For this reason, even if the weight of the user or the own weight of the walking machine 10 acts on the leg portion 12 as a supporting leg, the knee joint portion 24 is unlikely to buckle. The reason why the rod 52 is highly rigid as described above is that it can withstand the compressive load caused by the weight of the user and the weight of the walking machine 10. In this regard, when the landing portion 22 has landed on the floor surface FL, the rotation restricting portion 25 moves the rod 52 from the retracted position to the engaging position, thereby causing relative rotation between the thigh 21 and the crus 23. Can be regulated.

  By the way, when the rotation restricting part 25 is not provided in the walking machine 10, when a compressive load due to the weight of the user or the weight of the walking machine 10 acts on the knee joint part 24, the knee joint part 24 protrudes in the traveling direction, and the knee There is a risk of buckling of the joint 24. On the other hand, according to the walking machine 10 of this embodiment, the buckling of the knee joint portion 24 is suppressed by the rotation restricting portion 25.

  As shown in FIG. 2B, the reaction force from the floor surface FL acting on the rotating member 37 is eliminated by the landing portion 22 of the leg portion 12 that becomes the free leg from the support leg being separated from the floor surface FL. Is done. For this reason, the compression state of the compression spring 54 compressed by the guide part 53 and the bending part 42 is eliminated. Then, when the restoring force of the compression spring 54 acts on the bent portion 42, the bent portion 42 moves in a direction away from the guide portion 53 of the crus 23. As the bent portion 42 moves, the rotating member 37 moves from the first position to the second position. Further, the rod 52 supported by the bent portion 42 moves along the crus 23 in a direction away from the thigh 21. The second position is a position that can be taken by the rotating member 37 of the leg portion 12 which is a free leg. When the urging force of the compression spring 54 is applied to the rotating member 37, the rotating member 37 moves from the first position to the second position.

  As shown in FIG. 2C, when the bent portion 42 is displaced and the rod 52 moves, the tip of the rod 52 is pulled out from the insertion portion 51. Thus, the rod 52 moves from the engagement position to the retracted position, so that the rod 52 is released from the state of being inserted into the insertion portion 51. In the leg portion 12 thus formed as a free leg, the state where the relative rotation between the thigh portion 21 and the crus portion 23 is restricted is eliminated, so that the knee joint portion 24 can bend and stretch. In this regard, the rotation restricting portion 25 can allow relative rotation between the thigh 21 and the crus 23 when the landing portion 22 is separated from the floor surface FL. The second position of the rotation member 37 is a position where the rod 52 is not disposed at the engagement position.

According to the above embodiment, the following effects can be obtained.
(1) The walker 10 can be walked by alternately moving the paired leg portions 12. When the walking device 10 is thus walked, when the landing portion 22 of the crus 23 lands on the floor surface FL, the rotation restricting portion 25 restricts the buckling of the knee joint portion 24. Further, also when the walker 10 is upright, the landing portion 22 of the paired leg portion 12 is landed on the floor surface FL, and the rotation restricting portion 25 restricts the buckling of the knee joint portion 24. In other words, the rotation restricting portion 25 can restrict the buckling of the knee joint portion 24 against the dead weight acting on the knee joint portion 24 and the like. Therefore, when a user uses the walking machine 10, careless buckling of the knee joint part 24 can be suppressed.

  (2) The knee joint portion 24 can be bent at the leg portion 12 (free leg) of the paired leg portions 12 in which the landing state of the landing portion 22 is eliminated. Therefore, the bending operation of the knee joint portion 24 can be restricted or allowed as necessary.

  (3) The landing portion 22 is landed on the floor surface FL, and the rod 52 is disposed at the engaging position, so that the rod 52 is engaged with the insertion portion 51 of the thigh 21 and the knee joint portion 24 is bent. Operation is restricted. With such a simple configuration, buckling of the knee joint portion 24 can be suppressed.

  (4) The rotating member 37 moves from the second position to the first position by landing on the floor surface FL and rotating. Then, the rod 52 is arrange | positioned in an engagement position. At this time, the rotating member 37 rotates by a moment that is generated regardless of the direction of the force received from the floor surface FL when the rotating member 37 lands. On the other hand, when a linear motion member that moves linearly between the first position and the second position is used instead of the rotation member 37, the linear motion member is placed on the floor surface FL. When landing, a force is received from the arc surface 36a. In this case, depending on the direction of the force, it may be difficult to move the linear motion member from the second position to the first position. For example, if the linear motion member receives a force from a direction different from the movement direction between the first position and the second position, the linear movement member may not move smoothly. In this regard, according to the walking machine 10 described above, since the rotating member 37 rotates stably, the rod 52 can be smoothly moved from the retracted position to the engaged position.

  (5) Since the urging force of the compression spring 54 acts on the rotating member 37 as compared with the case where the rotating member 37 moves from the first position to the second position only by its own weight, the rotating member 37 is moved to the first position. To the second position stably.

(6) The walker 10 that can suppress buckling of the knee joint portion 24 can be used as the walker 10 for performing walking training while supporting the upper body of the user.
In addition, you may change the said embodiment as shown below.

  As shown in FIG. 4, the walking machine 10A includes a handle 65 used by a user to operate the walking machine 10A, and a loading platform 67 that is connected to the waist shaft 11 and on which the luggage 66 is placed. You may change to The shape of the handle 65 may be a rod shape whose longitudinal direction is the axial direction of the waist axis 11 or may be annular. The shape of the loading platform 67 may be changed according to the size and shape of the luggage 66. Thus, a walker that can suppress buckling of the knee joint portion 24 can be used as a walker 10A for carrying goods.

  The rotation restricting portion 25 is configured by a configuration different from that in which the rod 52 as the second engaging portion is inserted into the inserting portion 51 as the first engaging portion to restrict the bending motion of the knee joint portion 24. It may be configured. For example, each of the first engaging portion and the second engaging portion is provided with a comb tooth portion, and the comb tooth portions of both the engaging portions are engaged with each other at the engaging position, or the teeth of both engaging portions at the retracted position. The combined state may be canceled.

  When the bending of the knee joint portion 24 is restricted, the longitudinal directions of the thigh 21 and the crus 23 do not have to coincide with each other. That is, the bending of the knee joint 24 is restricted in a state in which the longitudinal directions of the thigh 21 and the crus 23 are made to coincide with each other and the crus 23 is slightly rotated with respect to the thigh 21. You may make it do.

The contact portion 33 may be omitted from the thigh 21 and the contact portion 35 may be omitted from the crus 23.
The leg 12 may be a 1: 2 pair or a 2: 2 pair instead of a 1: 1 pair. When the leg part 12 is a 1: 2 pair, the leg is a three-legged walking machine 10, and when the leg part 12 is a 2: 2 pair, the leg is a four-legged walking machine 10.

-The different diameter part 56a may be abbreviate | omitted from the engagement hole 56, and the engagement hole 56 may be formed only from the fixed diameter part 56b. Further, the different diameter portion 56a may be a constant diameter portion having an inner diameter larger than that of the constant diameter portion 56b.
The compression spring 54 may be provided in the engagement hole 56 of the insertion portion 51. In this case, an elastic force corresponding to the compression deformation of the compression spring 54 acts on the rotating member 37 via the rod 52. Thereby, the rotating member 37 can be moved from the second position to the first position.

  The compression spring 54 as the urging member may be a tension spring. In this case, it is desirable to apply an urging force by a tension spring that moves the rotating member 37 from the first position to the second position. Further, the compression spring 54 may be replaced with an elastic body such as rubber.

The compression spring 54 may be omitted. In this case, the rotating member 37 can be moved from the first position to the second position by the weight of the rod 52.
-You may fix the rotation member 37 with respect to the leg part 36 so that rotation is impossible. In this case, it is desirable to form the rotating member 37 from a material that can be elastically deformed. According to this configuration, the rotating member 37 can be returned from the first position to the second position by an elastic force generated by its own elastic deformation. That is, in this case, the rotating member 37 itself constitutes a so-called leaf spring.

  The rod 52 may be formed of a material other than a metal material such as a resin material. In this case, it is desirable that the rod 52 has such a rigidity that the rod 52 can be continuously disposed at the engagement position when the rotation restricting portion 25 restricts the buckling of the knee joint portion 24.

  DESCRIPTION OF SYMBOLS 10,10A ... Walker, 11 ... Lumbar axis, 12 ... Leg part, 13 ... Support part, 21 ... Thigh part, 22 ... Landing part, 23 ... Lower leg part, 24 ... Knee joint part, 25 ... Rotation restriction part , 36 ... feet (landing part main body), 37 ... rotating member, 51 ... insertion part (an example of the first engaging part), 52 ... rod (an example of the second engaging part), 54 ... compression spring ( An example of an urging member), 61... Chest support (an example of a support), 62... An arm support (an example of a support), 65 ... a handle, 67.

Claims (6)

It is a walking machine that can be walked by alternately moving paired legs,
The legs are
A thigh supported to be swingable with respect to the waist axis;
A lower leg portion having a landing portion capable of landing on the landing surface;
A knee joint for connecting the thigh and the lower leg so as to bend and stretch;
A rotation restricting portion capable of restricting a bending motion of the knee joint portion in a state where the landing portion is landed on the landing surface ,
The rotation restricting portion restricts the bending motion of the knee joint when the landing portion lands on the ground, while allowing the bending motion of the knee joint when the landing state of the landing portion is canceled. And
Between the first engaging portion provided in the thigh, an engaging position engageable with the first engaging portion, and a retracted position retracted from the first engaging portion A second engaging portion movable along the portion,
When the landing portion has landed on the landing surface, the second engagement portion is moved from the retracted position to the engagement position and engaged with the first engagement portion, thereby A walker that regulates bending motion . The landing portion includes a landing portion main body, a first position where the second engagement portion is disposed at the engagement position, and a second position where the second engagement portion is not disposed at the engagement position. A rotating member that is movable between and a rotating member that is rotatably supported with respect to the landing portion main body,
The walker according to claim 1 , wherein the rotating member moves from the second position to the first position when the rotating member lands on the landing surface. The rotation restricting portion further includes a biasing member,
The walker according to claim 2 , wherein the urging force of the urging member acts on the rotating member to move the rotating member from the first position to the second position. . The walking machine according to any one of claims 1 to 3 , wherein a support portion capable of supporting a user's upper body is provided on the waist axis. The support portion includes a chest support portion capable of supporting a user's chest, and a pair of arm support portions disposed on both sides of the chest support portion and capable of supporting both arms of the user. The walking machine according to claim 4 , wherein: Wherein the waist axis, a handle user uses the operation of the walking machine, in any one of claims 1 to 3, characterized in that the loading platform is provided with luggage is placed The described walking machine.

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