JP6636296B2 - Posture holder and furniture set - Google Patents

Description

  The present invention relates to a technique of a posture holding device and a furniture set.

  Prolonged desk work results in a posture in which the spine is bent (so-called cat-back posture), which causes a worker to suffer from health problems such as low back pain. In addition, prolonged desk work continues to maintain the same posture, thereby causing health damage to the economy syndrome to workers. Further, long desk work does not move the body, so that the worker is likely to become sleepy, and it has been pointed out that adverse effects such as a decrease in productivity of the worker are performed. Therefore, for example, there are countries such as Denmark that prohibit working in the same position for a long time by law.

  In order to eliminate the adverse effects of such a long desk work, a standing desk capable of working in a standing position has recently been developed. Further, in order to perform deskwork in a correct posture, a chair such as a balance chair that can be seated in a posture in which the back is stretched has been developed (for example, Patent Document 1).

JP 2014-124503 A

  FIG. 1 illustrates a usage state of a conventional standing desk 100. As illustrated in FIG. 1, according to the standing desk 100, the worker works in a standing position, so that the back muscles are stretched, which prevents back pain and also has the effect of preventing drowsiness and the like. However, there is a problem that it is difficult to continue long-time work in the standing position because the load on the legs is large in the standing position.

  In order to solve such a problem, a posture holder 200 used together with the standing desk 100 has been developed as illustrated in FIG. 2 (for example, The Locus Workstation by Focal). FIG. 2 illustrates a use state of a conventional posture holding device 200. The posture holding device 200 includes a high stool 201 that can be seated in a state similar to a standing position, and a footrest 202 that tilts an operator toward the high stool 201. According to the posture holder 200, the weight of the worker can be supported by the high stool 201, so that the burden on the legs can be reduced.

  However, in this posture holding device, the worker is separated from the standing desk 100 because the posture is inclined backward. Therefore, the worker has to work with his hand extended, and there is a problem that a burden is easily applied to the shoulder and the arm. In addition, in this posture holding device 200, since the worker keeps standing with the legs extended, all the weight of the worker below the waist is supported by the soles, and the burden on the feet is large, which is also a long time. There was a problem that it was difficult to continue the work.

  Further, according to the balance chair exemplified in Patent Literature 1, the worker can take a posture in which the back is extended by supporting the knee by the leg supporting portion. Therefore, according to the balance chair, desk work can be performed in a correct posture.

  However, in such a balance chair, the worker is supported on the knee in a state where the leg is largely bent and the foot does not touch the floor. That is, the weight is not applied to the soles of the feet, and the worker assumes a posture to support the weight at the two positions of the buttocks and the knees. For this reason, there is a problem in that the burden on the knee is increased and the knee is hurt when sitting on the balance chair for a long time. In addition, in this balance chair, since the worker keeps the same posture for a long time with the lower limbs fixed, there is a problem that numbness of the feet and swelling of the feet due to poor blood circulation occur. There was a point.

  Therefore, the conventional standing desk and the balance chair have a problem that it is difficult to maintain a posture in which the back muscles are stretched because the burden on the legs of the worker is large and easily fatigued.

  In one aspect, the present invention has been made in view of such circumstances, and an object of the present invention is to provide a posture holding device that can maintain a posture in which a back muscle is stretched relatively easily.

  The present invention employs the following configuration in order to solve the above-described problems.

  That is, a posture holding device according to one aspect of the present invention has a mounting surface on which an operator places a foot, and a base configured such that the mounting surface can tilt forward, and is connected to the base, A holding mechanism that extends upward from the base, and a knee support portion that is held by the holding mechanism at a height that can support the front of each knee of the worker who puts a foot on the base, and the base includes: The tilt angle of the placing surface is configured to be freely changeable.

  In the above configuration, since the mounting surface of the base can be tilted forward, the worker who puts his or her feet on the base can naturally take a forward tilted posture (forward tilted posture). In addition, since each knee of the worker is supported by the knee supporting portion from the front, the force acting from the knee supporting portion on the portion above each knee of the worker is directed rearward, whereby the worker The part above each knee can easily take a posture warped backward. That is, according to the configuration, the operator can easily take a posture in which the back muscles are stretched by taking a portion above the knee backward while taking a forward leaning posture.

  Further, in the above configuration, the base on which the operator places the foot is configured such that the inclination angle of the mounting surface can be freely changed. Therefore, during the operation, the operator can cause the lower limb to follow the forward inclination of the upper limb. In other words, by changing the inclination angle of the mounting surface of the base, the worker can change the posture smoothly during the work. Thus, according to the above configuration, accumulation of fatigue caused by keeping the same posture for a long time can be prevented, and the load on the lower limb of the worker can be reduced. In addition, since the inclination angle of the mounting surface can be changed, the operator can take a forward leaning posture at an optimum angle according to the force applied to the knee support.

  Therefore, according to the posture holding tool according to the above configuration, it is easy to take a posture in which the back muscles are stretched, and it is possible to reduce the load applied to the lower limbs of the worker while performing the work. The extended posture of the back can be maintained relatively easily. In addition, the present posture holding tool may be used alone, or may be used together with a stool such as a high stool. In any case, the worker can lean forward with the posture holding tool in a standing position or a state similar to the posture, and can easily take a posture in which the back muscles are extended.

  Further, as another form of the posture holding tool according to the one side surface, the knee support portion may be constituted by a pair of knee support members arranged to be separated from each other left and right. In this configuration, the lower limb of the worker is supported at three points: the mounting surface of the base, the right knee support member, and the left knee support member. Therefore, according to the above configuration, the lower leg of the worker can be stably supported at three points, and the force acting on the lower leg of the worker can be distributed to the sole and each knee. Further, since the both knee support members are separated from each other left and right, both legs of the worker are in an open state, and the lower limb can easily follow the movement of the upper body during the work of the worker. Therefore, according to this configuration, the worker can relatively easily maintain the posture in which the back muscles are extended.

  Further, as another form of the posture holding tool according to the one aspect, the pair of knee support members may be configured to be able to change the height at which the worker's knee is supported. According to this configuration, the height of each knee support member can be adjusted to be suitable for the position of each knee of each worker. Therefore, according to this configuration, the convenience of the posture holder can be improved.

  Further, as another form of the posture holder according to the one aspect, the pair of knee support members may be configured to be capable of changing a tilt of supporting the knee of the worker. According to this configuration, the direction of each knee support member can be adjusted so that each worker can easily take a forward leaning posture. Therefore, according to this configuration, the convenience of the posture holder can be improved.

  For example, by directing each knee support member in a direction in which each worker's knee naturally bends, each knee support member can support each worker's knee in a natural state. As a result, the load on the knees of each worker can be reduced, and the worker can maintain the posture in which the back muscles are stretched relatively easily.

  Further, as another form of the posture holding tool according to the one side surface, the pair of knee support members may be configured to be able to change a distance to be separated in the left-right direction. According to this configuration, the distance between the two knee supporting members can be adjusted to be suitable for the distance between the two knees of each worker. Therefore, according to this configuration, the convenience of the posture holder can be improved.

  Further, as another form of the posture holding tool according to the one side surface, the base may be divided into a right base portion and a left base portion, and the holding mechanism may be connected to the right base portion. It may be constituted by a right support part and a left support part connected to the left base part. The right knee support member of the pair of knee support members may be held by a right support, and the left knee support member of the pair of knee support members may be held by a left support. . According to this configuration, the pair of knee support members that support each knee of the worker are independently arranged. That is, since the mechanisms for supporting each knee of the worker are separated on the right side and the left side, the posture holder easily follows the movement of each knee of the worker. Therefore, according to this configuration, it is possible to particularly reduce the load on the lower limb of the worker while performing the work.

  Further, as another mode of the posture holding tool according to the one side surface, the base is configured such that at least a part of the lower surface of the base is curved, so that the inclination angle of the placement surface can be freely changed. Is also good. According to this configuration, the inclination angle of the mounting surface can be freely changed with a simple configuration in which at least a part of the lower surface of the base is curved. Therefore, according to the configuration, it is possible to realize a posture holding tool that is less likely to cause fatigue of the worker's body with a simple configuration.

  Further, a furniture set according to one aspect of the present invention includes a standing desk for a worker to perform work in an upright position, and a posture holder according to any one of the above embodiments. According to the furniture set according to the configuration, as described above, the worker can easily take a posture in which the back muscles are stretched, and can reduce the load applied to the lower limbs of the worker while performing the work. Therefore, the posture in which the back muscles are extended can be maintained relatively easily.

  The standing desk is a desk on which the worker works in a standing position or a posture similar to the standing position. That is, the standing desk is used for the worker to perform work while standing. The standing desk generally refers to a desk whose length from the lower end to the upper surface of the top plate (hereinafter, also referred to as “height”) is about 800 mm to 1300 mm. However, whether or not the worker is in the standing position or in a posture similar to the standing position depends on attributes of the worker, such as height, legs, and arms. Therefore, the height of the standing desk does not necessarily have to be limited to the above range.

  A furniture set according to one aspect of the present invention includes a high stool that allows a worker working in an upright position to sit down, and a posture holder according to any of the above aspects. According to the furniture set according to the configuration, as described above, the worker can easily take a posture in which the back muscles are stretched, and can reduce the load applied to the lower limbs of the worker while performing the work. Therefore, the posture in which the back muscles are extended can be maintained relatively easily.

  The high stool is a chair on which a worker can sit in a standing position or a posture similar to the standing position. The high stool generally refers to a chair that does not have a backrest and an armrest, and that has a seating height of about 500 mm to 800 mm. However, whether or not the worker is in the standing position or in a posture similar to the standing position depends on attributes such as the height and the length of the feet of the worker. Therefore, the height of the high stool does not necessarily have to be limited to the above range. For example, a high stool may be defined as a chair in which the angle of the knee joint of a worker when bending is less than 90 degrees.

  Further, as another form of the furniture set according to the one aspect, the high stool may be configured to be swingable in the front-rear direction. In this configuration, since the high stool can swing in the front-back direction, the worker causes the forward leaning posture of the upper limb to follow the forward leaning angle of the lower limb by swinging the high stool. The angle can be changed. Therefore, according to the configuration, it is possible to prevent the posture at the same angle from being continued, and it is possible to make it hard for the worker's body to accumulate fatigue.

  Further, as another form of the furniture set according to the one side surface, the high stool has a pedestal portion arranged on the ground, and the high stool has at least a part of a lower surface of the pedestal portion curved. Therefore, it may be configured to be able to swing in the front-rear direction. According to this configuration, the high stool can be swingable in the front-rear direction with a simple configuration in which at least a part of the lower surface of the pedestal portion is curved. Therefore, according to this configuration, it is possible to realize a furniture set with a simple configuration in which the body of the worker is hardly tired.

  ADVANTAGE OF THE INVENTION According to this invention, the attitude | position holding tool which can maintain the attitude | position which the back muscle extended can be comparatively easy.

FIG. 1 schematically illustrates a usage state of a conventional standing desk. FIG. 2 schematically illustrates a state of use of a conventional posture holding device. FIG. 3 is a rear view schematically illustrating the posture holder according to the embodiment. FIG. 4 is a plan view schematically illustrating the posture holder according to the embodiment. FIG. 5 is a side view schematically illustrating the posture holder according to the embodiment. FIG. 6 schematically illustrates a situation where the posture holding tool according to the embodiment is used together with a standing desk. FIG. 7 schematically illustrates a scene in which the posture holder according to the embodiment is used together with a high stool. FIG. 8 schematically illustrates the relationship between the forces acting on the legs when the foot is bent upward. FIG. 9 schematically illustrates the relationship between the forces acting on the legs when the foot is bent downward. FIG. 10 is a side view schematically illustrating a posture holder according to another embodiment. FIG. 11A is a rear view schematically illustrating a posture holder according to another embodiment. FIG. 11B is a side view schematically illustrating a posture holder according to another embodiment. FIG. 12A is a rear view schematically illustrating a posture holder according to another embodiment. FIG. 12B is a side view schematically illustrating a posture holder according to another embodiment. FIG. 13 is a rear view schematically illustrating a posture holder according to another embodiment. FIG. 14A is a rear view schematically illustrating a posture holder according to another embodiment. FIG. 14B is a side view schematically illustrating a posture holder according to another embodiment. FIG. 15A is a rear view schematically illustrating a posture holder according to another embodiment. FIG. 15B is a side view schematically illustrating a posture holder according to another embodiment. FIG. 16 is a side view schematically illustrating a posture holder according to another embodiment. FIG. 17 schematically illustrates a high stool according to another embodiment. FIG. 18 schematically illustrates a basic configuration of the posture holder. FIG. 19 schematically illustrates a posture holder according to the embodiment. FIG. 20 schematically illustrates a posture holder according to a comparative example. FIG. 21A shows the body pressure distribution on the knee when the first subject on a chair whose seat is inclined at 7 degrees uses the posture holder according to the embodiment. FIG. 21B shows a body pressure distribution on the sole of the foot when the first subject on a chair whose seat is inclined at 7 degrees uses the posture holder according to the embodiment. FIG. 21C shows the body pressure distribution on the knee when the first subject, who is sitting on a chair whose seat is inclined at 7 degrees, uses the posture holder according to the comparative example. FIG. 21D shows the body pressure distribution on the soles when the first subject on a chair whose seat is inclined at 7 degrees uses the posture holder according to the comparative example. FIG. 22A shows the time course of the contact pressure on the knee of the first subject who was placed on a chair whose seat surface was inclined at 7 degrees. FIG. 22B shows the time course of the load on the knees of the first subject who was placed on a chair whose seat surface was inclined at 7 degrees. FIG. 22C shows the time course of the contact pressure on the sole of the first subject who was placed on a chair whose seat surface was inclined at 7 degrees. FIG. 22D shows the time course of the load on the sole of the first subject who was placed on a chair whose seat surface was inclined at 7 degrees. FIG. 23A shows the body pressure distribution on the knee when the first subject on a chair whose seat is inclined at 14 degrees uses the posture holder according to the embodiment. FIG. 23B shows a body pressure distribution on the sole when the first subject on a chair whose seat is inclined at 14 degrees uses the posture holder according to the embodiment. FIG. 23C shows a body pressure distribution on the knee when the first subject, who is sitting on a chair whose seat is inclined at 14 degrees, uses the posture holder according to the comparative example. FIG. 23D shows a body pressure distribution on the sole when the first subject on a chair whose seat is inclined at 14 degrees uses the posture holder according to the comparative example. FIG. 24A shows the time course of the contact pressure on the knee of the first subject who was placed on a chair whose seat surface was inclined at 14 degrees. FIG. 24B shows the time course of the load on the knee of the first subject who was placed on the chair whose seat surface was inclined at 14 degrees. FIG. 24C shows the time course of the contact pressure on the sole of the first subject who was placed on a chair whose seat surface was inclined at 14 degrees. FIG. 24D shows the time course of the load on the sole of the first subject who was placed on a chair whose seat surface was inclined at 14 degrees. FIG. 25A shows the body pressure distribution on the knee when the second subject on a chair whose seat is inclined at 7 degrees uses the posture holder according to the embodiment. FIG. 25B shows a body pressure distribution on the sole when a second subject, who is sitting on a chair whose seat is inclined at 7 degrees, uses the posture holder according to the embodiment. FIG. 25C shows the body pressure distribution on the knee when the second subject, who is sitting on a chair whose seat is inclined at 7 degrees, uses the posture holder according to the comparative example. FIG. 25D shows a body pressure distribution on the sole when a second subject, who is sitting on a chair whose seat is inclined at 7 degrees, uses the posture holder according to the comparative example. FIG. 26A shows the time course of the contact pressure on the knee of the second subject who was placed on a chair whose seat surface was inclined at 7 degrees. FIG. 26B shows the time course of the load on the knee of the second subject who was placed on a chair whose seat surface was inclined at 7 degrees. FIG. 26C shows the time course of the contact pressure on the sole of the second subject who was placed on a chair whose seat surface was inclined at 7 degrees. FIG. 26D shows the time course of the load on the sole of the second subject who was placed on a chair whose seat surface was inclined at 7 degrees. FIG. 27A shows a body pressure distribution on a knee when a second subject, who is sitting on a chair whose seat is inclined at 14 degrees, uses the posture holding device according to the embodiment. FIG. 27B shows a body pressure distribution on the sole when the second subject, who is sitting on a chair whose seat is inclined at 14 degrees, uses the posture holding device according to the embodiment. FIG. 27C shows the body pressure distribution on the knee when the second subject, who is sitting on a chair whose seat is inclined at 14 degrees, uses the posture holder according to the comparative example. FIG. 27D shows a body pressure distribution on the sole when a second subject, who is sitting on a chair whose seat is inclined at 14 degrees, uses the posture holder according to the comparative example. FIG. 28A shows the time course of the contact pressure on the knee of the second subject who was placed on a chair whose seat surface was inclined at 14 degrees. FIG. 28B shows the time course of the load on the knee of the second subject who was placed on the chair whose seat surface was inclined at 14 degrees. FIG. 28C shows the time course of the contact pressure against the sole of the second subject who was placed on a chair whose seat surface was inclined at 14 degrees. FIG. 28D shows the time course of the load on the sole of the second subject who was placed on a chair whose seat surface was inclined at 14 degrees.

  Hereinafter, an embodiment according to one aspect of the present invention (hereinafter, also referred to as “the present embodiment”) will be described with reference to the drawings. However, the present embodiment described below is merely an example of the present invention in every respect. Various improvements and modifications may be made without departing from the scope of the invention. That is, in implementing the present invention, a specific configuration according to the embodiment may be appropriately adopted.

§1 Configuration Example First, a posture holder 1 according to the present embodiment will be described with reference to FIGS. 3 to 5 are a rear view, a plan view, and a side view schematically illustrating the posture holder 1 according to the present embodiment. In FIGS. 3 to 5, each direction is illustrated using an x-axis, a y-axis, and a z-axis for convenience of description. Here, the z-axis direction corresponds to a direction perpendicular to the ground, and the positive direction of the z-axis corresponds to a vertically upward direction. The xy plane corresponds to a plane horizontal to the ground, and the x-axis direction and the y-axis direction each correspond to a direction horizontal to the ground. Hereinafter, the positive direction of the z-axis and the negative direction are referred to as “up” and “down”, respectively, the positive direction of the x-axis and the negative direction are referred to as “front” and “back”, respectively, and the positive direction of the y-axis. And the negative direction are referred to as “right” and “left”, respectively.

  As illustrated in FIGS. 3 to 5, the posture holder 1 according to the present embodiment includes, in order from the bottom, a base 2, a holding mechanism 3 connected to the base 2, and extending upward from the base 2; And a knee support 4 held by the holding mechanism 3. In the present embodiment, each of these components is divided into left and right in order to individually and independently correspond to each leg of the worker. Hereinafter, each component will be described.

<Base>
First, the base 2 will be described. As illustrated in FIGS. 3 to 5, the base 2 according to the present embodiment is configured by being divided into a right base portion 21 and a left base portion 22. In the present embodiment, each of the base portions (21, 22) has a shape in which one corner of a rectangle is cut off so that they can be arranged obliquely to each other.

  Each base (21, 22) has a mounting surface (211 and 221) on the upper side. The mounting surface 211 of the right base portion 21 and the mounting surface 221 of the left base portion 22 constitute a mounting surface of the base 2 on which the worker places his / her feet. Specifically, in the posture holder 1 according to the present embodiment, the worker's right foot may be placed on the placement surface 211 of the right base 21 and the worker's left foot may be placed on the placement surface 221 of the left base 22. It is assumed.

  On the other hand, each base portion (21, 22) has a lower surface (212, 222) on the lower side, which is in contact with the ground when the posture holder 1 is arranged on the ground. The lower surface 212 of the right base portion 21 and the lower surface 222 of the left base portion 22 constitute the lower surface of the base 2. The lower surface (212, 222) of each base portion (21, 22) is curved over the entire area and formed in an arc shape in a side view.

  Therefore, the position of each base portion (21, 22) in contact with the ground on each lower surface (212, 222) varies depending on the degree of application of a force, and the inclination of each base portion (21, 22) changes. It is configured to be. That is, each base portion (21, 22) is configured such that the inclination angle of each mounting surface (211 and 222) can be freely changed by the curved lower surface (212 and 222). In particular, each of the base portions (21, 22) is configured such that each of the mounting surfaces (211 and 222) can be inclined forward.

  Here, in FIG. 4, in a state where the worker is not on each of the mounting surfaces (211 and 222), each of the mounting surfaces (211 and 222) of each of the bases (21 and 22) is slightly inclined forward. ing. As described above, each of the base portions (21, 22) is configured such that each of the mounting surfaces (211 and 222) is inclined forward in a state where the worker is not on each of the mounting surfaces (211 and 222). May be done.

  Note that “inclined forward” means that the mounting surfaces (211 and 222) are positioned so that the toes of the feet mounted on the mounting surfaces (211 and 222) are positioned below and the heels are positioned upward. Refers to an inclined state. In other words, “incline forward” means that each mounting surface (211 and 222) is inclined such that the front end side of each mounting surface (211 and 222) is located downward and the rear end side is located upward. Refers to the state of

  For example, in the present embodiment, each base portion (21, 22) is curved in an arc shape in a side view. Therefore, the posture holder 1 is configured such that the weight of each base portion (21, 22) and other components is adjusted, and a larger force acts on the front side than on the rear side of each base portion (21, 22). I do. Thereby, each base part (21, 22) is configured such that each mounting surface (211 and 222) is inclined forward in a state where the worker is not on each mounting surface (211 and 222). be able to.

  However, each base part (21, 22) may not be limited to such an example, and when the worker is not on each mounting surface (211, 222), each mounting surface (211, 22) may be used. 222) may be configured to be horizontal or inclined rearward. Each base portion (21, 22) may be appropriately configured according to the embodiment as long as each mounting surface (211 and 222) can be inclined forward.

  In addition, the material of each base part (21, 22) may be appropriately selected according to the embodiment. For example, as a material of each base portion (21, 22), a plate material made of wood, resin, metal, or the like may be used. Each base portion (21, 22) can be formed by appropriately processing such a material by a known processing method such as press processing.

<Holding mechanism>
Next, the holding mechanism 3 will be described. As illustrated in FIGS. 3 to 5, the holding mechanism 3 according to the present embodiment includes a right support 31 connected to the right base 21 and a left support 32 connected to the left base 22. ing. The right support 31 is formed in a cylindrical shape, and is connected to the mounting surface 211 of the right base 21. Similarly, the left support 32 is formed in a cylindrical shape, and is connected to the mounting surface 221 of the left base 22.

  In addition, the material of each support | pillar part (31, 32) may be suitably selected according to embodiment. For example, as the material of each pillar (31, 32), a pillar made of wood, resin, metal or the like may be used. Each column (31, 32) can be formed by appropriately processing such a material by a known processing method. In addition, the shape of each pillar (31, 32) is not limited to such an example, and may be appropriately selected according to the embodiment. For example, each pillar (31, 32) may be formed in a prismatic shape.

  In addition, a known method may be used as a method of connecting each of the columns (31, 32) and each of the bases (21, 22). For example, when each of the support portions (31, 32) and each of the base portions (21, 22) are made of a metal material, the support portions (31, 32) and the base portions (21, 22) are They may be fixedly connected by welding. In addition, for example, the support portions (31, 32) and the base portions (21, 22) may be fixedly connected by an adhesive. Furthermore, for example, each support part (31, 32) and each base part (21, 22) may be mechanically connected by screws, hinges, or the like. The method of connecting the columns (31, 32) and the bases (21, 22) can be appropriately selected according to the embodiment.

  Here, the support portions (31, 32) and the base portions (21, 22) may be connected such that the support portions (31, 32) are rotatable around their axes. In this case, for example, a concave portion (not shown) opened on each mounting surface (211 and 221) side is provided in each base portion (21 and 22). Each of the concave portions may be opened also on each of the lower surfaces (212, 222). Then, the columns (31, 32) are fitted into the recesses, whereby the columns (31, 32) are attached to the bases (21, 22). At this time, the columns (31, 32) may be connected to the respective recesses by a retaining means such as a screw so that the columns do not come off in the vertical direction.

  Thereby, each support part (31, 32) and each base part (21, 22) can be connected so that each support part (31, 32) can rotate around an axis. However, the method of connecting the columns (31, 32) so as to be rotatable around the axis is not limited to such a method, and can be appropriately selected according to the embodiment. For example, the struts (31, 32) and the bases (21, 22) are connected to each other by mechanical means such as a spring so that the struts (31, 32) can rotate around their axes. Is also good.

<Knee support>
Next, the knee support 4 will be described. As illustrated in FIGS. 3 to 5, the knee support portion 4 according to the present embodiment is configured by a pair of knee support members (41, 42) that are arranged left and right apart. Of these, the right right knee support member 41 is formed in a rectangular shape, and is connected to the right support 31 to be held by the right support 31. Similarly, the left knee support member 42 on the left side is formed in a rectangular shape, and is connected to the left support portion 32 to be held by the left support portion 32.

  Here, each knee supporting member (41, 42) has a height capable of supporting the front of each knee of the worker who puts each foot on the mounting surface (211 221) of each base portion (21 22). , And is held by each support (31, 32). The “height capable of supporting the front of the knee” is a height at which each knee supporting member (41, 42) can contact at least a part of the front surface of each knee including the kneecap, and for example, The height is about 200 mm to 550 mm from the placement surface (211, 221). However, the “height that can support the front of the knee” depends on attributes such as the length of the worker's feet, and is not necessarily limited to the above range.

  In addition, the material of each knee support member (41, 42) may be appropriately selected according to the embodiment. For example, as a material of each knee support member (41, 42), a plate material made of wood, resin, metal, or the like may be used. Each knee support member (41, 42) can be formed by appropriately processing such a material by a known processing method.

  Further, a cushion material such as rubber or urethane may be used as a material of each knee support member (41, 42). Alternatively, such a cushion material may be attached to a portion of each knee support member (41, 42) in contact with each knee of the worker. Thereby, the burden on each knee of the worker can be reduced.

  In addition, a known method may be used as a method for connecting the knee support members (41, 42) and the struts (31, 32). For example, when each of the knee supporting members (41, 42) and each of the struts (31, 32) are made of a metal material, each of the knee supporting members (41, 42) and each of the struts (31, 42) are formed. 32) may be fixedly connected by welding. Further, for example, each knee support member (41, 42) and each column (31, 32) may be fixedly connected by an adhesive.

  Further, for example, the knee supporting members (41, 42) and the struts (31, 32) may be connected by a mechanical connecting means such as a pin hinge, a clamp, and a screw. At this time, the mechanical connection means may be configured to be able to connect the knee support members (41, 42) to a plurality of height positions of the support portions (31, 32). Thus, each knee supporting member (41, 42) can be configured to be able to change the height at which each knee of the worker is supported.

  With this configuration, the height of each knee support member (41, 42) can be adjusted so as to be suitable for the position of each knee of each worker. Therefore, according to the configuration, the convenience of the posture holder 1 can be improved. Note that the method of configuring each knee support member (41, 42) so that the height for supporting each knee of the worker can be changed is not limited to such an example, and may be determined according to the embodiment. It may be appropriately selected.

  In addition, each of the knee supporting members (41, 42) may be configured to be capable of changing the inclination of supporting each knee of the worker by the mechanical connection means or other means. Here, the “tilt for supporting each knee” may be at least one of a tilt around the axis and a tilt in the axial direction of each of the strut portions (31, 32). For example, the knee supporting members (41, 42) may be connected by a known connecting means such as a hinge or a clamp so as to be able to change the inclination about the axis of each of the columns (31, 32). Also, for example, as described above, by connecting each of the struts (31, 32) to each of the bases (21, 22) so as to be rotatable around the axis, each of the knee support members (41, 42) is connected to each of the struts. The inclination may be configured to be changeable about the axis of (31, 32). Also, for example, a member such as a hinge or a spring may be attached between a member connecting each knee support member (41, 42) to each column (31, 32) and each knee support member (41, 42). Each of the knee supporting members (41, 42) may be configured to be capable of changing the inclination of each of the struts (31, 32) in the axial direction. Furthermore, for example, by making each of the strut portions (31, 32) from a material that can be elastically deformed, each of the knee support members (41, 42) is configured to be capable of changing the inclination of supporting each knee of the worker. You may.

  With this configuration, the orientation of each knee support member (41, 42) can be adjusted so that each worker can easily take a forward leaning posture. Therefore, according to the configuration, the convenience of the posture holder 1 can be improved. In addition, the method of configuring each knee supporting member (41, 42) so that the inclination for supporting each knee of the worker can be changed is not limited to such an example, and may be appropriately determined according to the embodiment. May be selected.

§2 Usage Example Next, a usage example of the posture holder 1 according to the present embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 schematically illustrates a scene (first furniture set) in which the posture holder 1 according to the present embodiment is used together with the standing desk 5. FIG. 7 schematically illustrates a scene (second furniture set) in which the posture holder 1 according to the present embodiment is used together with the high stool 6.

<First furniture set>
First, the scene of FIG. 6 will be described. In FIG. 6, the posture holder 1 and the standing desk 5 constitute a furniture set. The standing desk 5 is a desk on which the worker works in a standing position or a posture similar to the standing position. In the present embodiment, the standing desk 5 includes a rectangular top plate 51 and leg portions 52 that support the top plate 51. The height of the standing desk 5, that is, the length from the lower end of the leg portion 52 to the upper surface of the top plate 51, is appropriately set according to the embodiment so that the worker is in a standing position or a posture similar to a standing position. May be set. For example, the height of the standing desk 5 may be set to about 800 mm to 1300 mm.

  When using the posture holding tool 1 together with such a standing desk 5, the operator first arranges the posture holding tool 1 near the rear of the standing desk 5. Next, the operator places each foot on each mounting surface (211 and 221). Specifically, the worker places the right foot on the placement surface 211 of the right base 21 and places the left foot on the placement surface 221 of the left base 22. At this time, the operator puts his or her weight slightly on the front side so that each of the mounting surfaces (211 and 221) is inclined forward, so that the operator takes a forwardly inclined posture. Then, the worker brings the front part of the right knee into contact with the right knee support member 41 and the front part of the left knee with the left knee support member 42 while taking such a forward leaning posture. Thereby, as illustrated in FIG. 6, the worker can perform the work using the standing desk 5 while maintaining the forward leaning posture.

<Second furniture set>
Next, the scene of FIG. 7 will be described. In FIG. 7, the posture holder 1 and a high stool 6 constitute a furniture set. The high stool 6 is a chair on which an operator can sit in a standing position or a posture similar to the standing position. In the present embodiment, the high stool 6 includes a seat portion 61 on which an operator sits down, a support portion 62 supporting the seat portion 61, and a pedestal portion 63 connected to the lower end of the support portion 62 and arranged on the ground. It has. The height of the seat 61 of the high stool 6 may be appropriately set according to the embodiment so that the worker is in a standing position or a posture similar to a standing position. For example, the height of the seat 61 of the high stool 6 may be set to about 500 mm to 800 mm.

  When using the posture holder 1 together with such a high stool 6, the operator first arranges the posture holder 1 near the front of the high stool 6. Next, the operator places each foot on each mounting surface (211, 221) while sitting on the seat 61 of the high stool 6. Either the step of sitting on the seat 61 of the high stool 6 or the step of placing each foot on each mounting surface (211 and 221) may be performed first or may be performed simultaneously. Then, the operator leans forward so that each mounting surface (211, 221) is inclined forward by leaning forward slightly while sitting on the seat 61 of the high stool 6. The front part of each knee is brought into contact with each knee supporting member at (41, 42) so as to take a posture. Thereby, as illustrated in FIG. 7, the worker can sit on the high stool 6 while maintaining the forward leaning posture.

  In the present embodiment, as illustrated in FIG. 7, the lower surface 631 of the pedestal portion 63 is curved over the entire area and formed in an arc shape in a side view. Thus, the high stool 6 is configured to be able to swing in the front-rear direction (x-axis direction in the drawing). Therefore, by swinging the high stool 6, the operator can follow the forward leaning posture of the upper limb to the forward leaning angle of the lower limb, thereby changing the angle of the forward leaning posture. Therefore, according to the second furniture set, it is possible to prevent the posture at the same angle from being continued, and to make it difficult for the worker's body to accumulate fatigue.

<Others>
In the first furniture set and the second furniture set, the posture holder 1 according to the present embodiment is used together with either the standing desk 5 or the high stool 6. However, the use form of the posture holder 1 according to the present embodiment is not limited to such an example. That is, the posture holder 1 according to the present embodiment may be used together with both the standing desk 5 and the high stool 6, or may be used alone, not together with the standing desk 5 and the high stool 6. Further, the posture holder 1 according to the present embodiment may be used together with furniture other than the standing desk 5 and the high stool 6.

  Here, the posture holding tool 1 includes a portion related to the worker's right leg (the right base portion 21, the right support portion 31, and the right knee support member 41) and a portion related to the left leg (the left base portion 22, the left support portion 32, And the left knee support member 42). Therefore, the portion relating to the right leg and the portion relating to the left leg can be moved independently of each other, whereby the distance at which the knee supporting members (41, 42) are separated from each other in the left-right direction can be freely changed. it can.

  That is, in the present embodiment, a portion related to the worker's right leg and a portion related to the left leg are configured separately, so that the pair of knee support members (41, 42) changes the distance apart in the left-right direction. It is configured to be possible. Therefore, the worker can adjust the distance in the left-right direction between the two knee support members (41, 42) so as to be suitable for the distance between the two knees when using the posture holding tool 1. it can. Therefore, the posture holder 1 according to the present embodiment is excellent in convenience.

[Action / Effect]
As described above, in the present embodiment, since the mounting surfaces (211 and 221) of the base portions (21 and 22) are configured to be tiltable forward, each foot is placed on each mounting surface (211 and 221). Can naturally take a forward leaning posture.

  With respect to this point, the effects of the posture holder 1 according to the present embodiment will be described in detail with reference to FIGS. FIG. 8 schematically illustrates the relationship between the forces acting on the legs when the foot is bent upward. FIG. 9 schematically illustrates the relationship between the forces acting on the legs when the foot is bent downward.

  It is assumed that the worker bends his or her feet upward as illustrated in FIG. Then, the gastrocnemius muscle is pulled backward by the movement of the foot. Thereby, the thigh of the leg is pulled so that the knee joint is bent. As a result, the quadriceps muscles are loosened, and the waist of the worker is likely to fall backward. In other words, it is easy for the worker to take a posture of leaning backward instead of a forward leaning posture.

  On the other hand, according to the posture holder 1 according to the present embodiment, since each mounting surface (211 and 221) is configured to be inclined forward, as illustrated in FIG. The operator's feet are bent downward. Then, due to the movement of the foot, the gastrocnemius muscle is loosened, and the knee is more likely to come forward. Therefore, as shown in FIG. 8, the gastrocnemius muscle does not pull the thigh backward, and the quadriceps femoris muscle is easily contracted, whereby the waist of the worker is easily pulled forward. That is, the worker can naturally take a forward leaning posture, instead of a posture falling backward.

  In addition, since each knee of the worker is supported from the front by each knee supporting member (41, 42), the force acting from each knee supporting member (41, 42) on the portion above each knee of the worker is It is directed rearward, which makes it easier for the part above the knees of the worker to take a posture warped backward. That is, according to the posture holding device 1 according to the present embodiment, the worker can easily take a posture in which the back muscles are stretched while taking a part above the knee backward while taking a forward leaning posture.

  Further, it is assumed that both knee supporting members (41, 42) are integrally formed, and the respective mounting surfaces (211 and 221) are configured such that the inclination angles cannot be changed. For example, this corresponds to the case where the lower surfaces (212, 222) of the respective base portions (21, 22) are flattened, and then the respective base portions (21, 22) are formed in a triangular shape in a side view. In such a case, the inclination angle of each mounting surface cannot be changed, and the loads of both knees are concentrated on the integral knee support, so that the lower limbs of the operator are less likely to change. For this reason, it is difficult for the lower limbs to follow the movement of the upper body of the worker, and it becomes difficult for the worker to perform the work.

  In addition, according to the description of "posture / motion" in Chapter 2 "Form / Motion" of "Architectural Design Data Collection [Human]" (Architectural Institute of Japan, published in January 2003), the human body shakes unconsciously. Is generally known. In particular, in the case of a posture close to a standing position such as a high stool, there is a research result that a body shake of about 20 cm in front and back and about 17 cm in left and right is generated at the top of the head. If the knee supporting members (41, 42) as described above are integrally formed, and the mounting surfaces (211 and 221) are configured such that the inclination angle cannot be changed, such a body is The posture holder cannot follow the change of the lower limb of the worker due to the shaking, and the load is likely to be applied to the lower limb.

  On the other hand, in this embodiment, each mounting surface (211 and 221) on which each foot of the worker is mounted is configured to be able to change the inclination angle freely. Therefore, during the operation, the operator can cause the lower limb to follow the forward inclination of the upper limb. In other words, during the work as shown in FIGS. 6 and 7, by changing the inclination angle of each mounting surface (211, 221), the worker can change the posture smoothly. Thus, according to the present embodiment, accumulation of fatigue due to keeping the same posture for a long time can be prevented, and the load on the lower limb of the worker can be reduced. Further, since the inclination angle of each mounting surface (211 and 221) is changeable, the operator takes a forward leaning posture at an optimum angle according to the force applied to each knee support member (41 and 42). Can be.

  Therefore, according to the posture holder 1 according to the present embodiment, it is easy to take a posture in which the back muscles are stretched, and it is possible to reduce the load on the lower limbs of the worker while performing the work. This makes it possible to maintain the posture in which the back muscles are stretched relatively easily. That is, according to the present embodiment, it is possible to provide the posture holder 1 that enables the posture in which the back muscles are stretched to be relatively easily maintained.

  Further, in the above embodiment, the knee support portion 4 is constituted by a pair of knee support members (41, 42) which are arranged left and right apart. Therefore, in the above-described embodiment, the lower limb of the worker is supported by at least three or more points of each mounting surface (211, 221), the right knee support member 41, and the left knee support member 42. Therefore, according to the present embodiment, it is possible to stably support the lower limb of the worker at at least three points, and to distribute the force acting on the lower limb of the worker to the sole and each knee. In addition, since the both knee supporting members (41, 42) are separated from each other in the left-right direction, both legs of the worker are in an open state, and the movement of the upper body of the worker, particularly, the movement of turning the upper body left and right. Lower limbs are easier to follow. Therefore, according to the above embodiment, the worker can maintain the posture in which the back muscles are extended relatively easily.

  In addition, the posture holder 1 according to the above embodiment is configured such that a part related to the right leg and a part related to the left leg of the worker are separated. Therefore, the posture holder 1 according to the present embodiment can follow the individual movement of each knee of the worker. Therefore, according to the above embodiment, it is possible to particularly reduce the load on the lower limb of the worker while performing the work.

§3 Modifications While the embodiments of the present invention have been described in detail, the above description is merely illustrative of the present invention in every respect. It goes without saying that various improvements and modifications can be made without departing from the scope of the invention. Further, with respect to each component of the posture holder 1, the omission, replacement, and addition of the component may be appropriately performed according to the embodiment. The shape and size of each component of the posture holding tool 1 may be appropriately set according to the embodiment. For example, the following changes are possible. In the modified example described below, the same reference numerals are used for the same components as those in the above-described embodiment, and the description is appropriately omitted.

<3.1>
For example, in the above-described embodiment, the entire lower surface (212, 222) of each base portion (21, 22) is curved so that the inclination angle of each mounting surface (211 and 221) can be changed. However, each of the base portions (21, 22) is not limited to such an example. If the inclination angle of each of the mounting surfaces (211 and 221) can be freely changed, each of the lower surfaces (212 and 222). The curved portion of may be a part. This modification is illustrated in FIG.

  FIG. 10 schematically illustrates a posture holder 1a according to this modification. The base 2a of the posture holder 1a illustrated in FIG. 10 is divided into a right base 21a and a left base 22a, similarly to the above embodiment. The lower surface (212a, 222a) of each base portion (21a, 22a) is curved not in the entire region but in a partial region in front so as to have an arc shape in side view. Otherwise, the posture holding device 1a is configured similarly to the posture holding device 1 according to the above embodiment.

  According to the posture holding device 1a according to the modification, the force is applied to the vicinity of a portion where the lower surface (212a, 222a) of each base portion (21a, 22a) is curved, so that the posture holding device according to the above embodiment. Similarly to 1, the inclination angle of each mounting surface (211 and 221) can be changed. Therefore, by bending at least a part of the lower surface (212, 222) of each base portion (21, 22), each base portion (21a, 22a) can be inclined at an angle of inclination of each mounting surface (211 and 221). It can be configured freely.

  According to the above embodiment and the modification, the inclination angle of the mounting surface can be freely changed with a simple configuration in which at least a part of the lower surface of the base is curved. Therefore, according to the above-described embodiment and the modified example, it is possible to realize a posture holding tool in which the body of the worker is hardly tired with a simple configuration.

<3.2>
Further, for example, in the above-described embodiment (and the posture holder 1a), the lower surfaces (212, 222) of the respective base portions (21, 22) are curved so that the respective base portions (21, 22) are respectively mounted. The inclination angle of the mounting surface (211 and 221) is configured to be changeable. However, the method of freely changing the inclination angle of each mounting surface (211 and 221) is not limited to such an example, and may be appropriately selected according to the embodiment. For example, each of the base portions (21, 22) may be configured to be able to change the inclination angle of each of the mounting surfaces (211 and 221) by one of the following two methods.

  First, with reference to FIGS. 11A and 11B, a method will be described in which the inclination angle of each mounting surface (211, 221) can be freely changed by using an elastic member such as a spring or rubber. FIG. 11A and FIG. 11B are a rear view and a side view schematically illustrating a posture holder 1b according to the present modification. As illustrated in FIGS. 11A and 11B, the base 2b of the posture holder 1b according to the present modification is divided into a right base 21b and a left base 22b, similarly to the above embodiment. I have.

  On the other hand, unlike the above-described embodiment, the right base portion 21b includes a flat lower plate 213 and an upper plate 214, and the lower plate 213 and the upper plate 214 are connected to each other by a connecting member 216 on the rear side. Are linked. An elastic member 215 is disposed between the lower plate 213 and the upper plate 214 near the center in a side view. The elastic member 215 is, for example, a spring, rubber, or the like, and is configured to be contractable so as to be shorter than the connecting member 216.

  The left base portion 22b is configured similarly to the right base portion 21b. That is, the left base portion 22b includes a flat lower plate 223 and an upper plate 224, respectively, and the lower plate 223 and the upper plate 224 are connected by the connecting member 226 on the rear side. Further, an elastic member 225 that can be contracted so as to be shorter than the connecting member 226 is disposed between the lower plate 223 and the upper plate 224 near the center in a side view.

  According to this posture holding tool 1b, the magnitude of the force acting on each elastic member (215, 225) is changed by changing the position where the worker places each foot, whereby the elastic member (215 , 225) can be changed. Therefore, according to the posture holder 1b, the mounting surface of each base portion (21b, 22b), that is, the inclination angle of the upper surface of each upper plate (214, 224) can be freely changed.

  Next, with reference to FIGS. 12A and 12B, a description will be given of a method of changing the inclination angle of each mounting surface (211 and 221) by using a spindle member. 12A and 12B are a rear view and a side view schematically illustrating a posture holder 1c according to the present modification. As illustrated in FIGS. 12A and 12B, the base 2c of the posture holding device 1c according to the present modification is configured by being divided into a right base portion 21c and a left base portion 22c as in the above-described embodiment. I have.

  The right base portion 21c includes a flat lower plate 213 and an upper plate 214, respectively, similarly to the posture holder 1b. A support member 217 is arranged near the center of the upper surface of the lower plate 213, and the support member 217 supports the upper plate 214 so as to be rotatable around an axis (front-back direction).

  The left base part 22c is configured similarly to the right base part 21c. That is, the left base portion 22c includes a lower plate 223 and an upper plate 224 having a flat plate shape, respectively. A support member 227 is disposed near the center of the upper surface of the lower plate 223, and the support member 227 supports the upper plate 224 so as to be rotatable around the axis (in the front-rear direction).

  According to this posture holder 1c, the inclination angle of each upper plate (214, 224) can be changed like a seesaw by changing the position where the worker places each foot. That is, according to the posture holder 1c, it is possible to freely change the inclination angle of the mounting surface of each base portion (21c, 22c), that is, the upper surface of each upper plate (214, 224).

<3.3>
Further, for example, in the above embodiment, the base 2 is configured to be separated into the right base portion 21 and the left base portion 22, and accordingly, the holding mechanism 3 includes the right support portion 31 and the left support portion 32. And are configured independently. However, the base 2 and the holding mechanism 3 need not be limited to such an example, and may be configured integrally, for example, as illustrated in FIG.

  FIG. 13 is a rear view schematically illustrating a posture holder 1d according to the present modification. In the posture holder 1d according to the present modification, the base 2d is not separated into two members but is formed integrally. The lower surface of the base 2d is curved similarly to the lower surface (212, 222) of each of the base portions (21, 22), whereby the inclination angle of the mounting surface (upper surface) of the base 2d can be changed. Is configured.

  Further, in the present modification, the holding mechanism 3d includes a cylindrical support 33 and a crossbar 34 connected to the support 33 and extending in the left-right direction. Then, each knee support member (41, 42) is attached to the crossbar 34. Thereby, the holding mechanism 3d holds the knee supporting members (41, 42).

  Note that the connection between the support portion 33 and the crossbar 34 and the connection between each knee support member (41, 42) and the crossbar 34 may be appropriately performed by a known connection method. At this time, each knee support member (41, 42) and the crossbar 34 may be connected so that the position where each knee support member (41, 42) is attached to the crossbar 34 can be changed. This makes it possible to change the distance of the left and right knee supporting members (41, 42) apart from each other in the left-right direction.

  In this modification, the right knee support member 41 and the left knee support member 42 may be integrally connected. That is, the knee support 4 does not have to be configured to be separated into the right knee support member 41 and the left knee support member 42. In this case, the cross bar 34 may be omitted, and the knee support 4 may be directly connected to the support 33.

<3.4>
Further, for example, the posture holding tool 1 according to the above-described embodiment is used for a worker to take a forward leaning posture in a standing state or a state similar to the standing state. However, the use form of the posture holding device 1 may not be limited to such an example. For example, as illustrated in FIGS. 14A and 14B, the posture holding device 1 is configured to be usable as a chair. You may.

  14A and 14B are a rear view and a side view schematically illustrating a posture holder 1e according to this modification. As illustrated in FIGS. 14A and 14B, the knee support portion 4 e of the posture holder 1 e according to the present modification includes a pair of knee support members ( 41e, 42e).

  On the other hand, unlike the above-described embodiment, the right knee support member 41e is not connected to the right support portion 31, and a rectangular seat 43 is connected to the upper end of the right knee support member 41e. The right support 31 is connected to the lower surface of the seat 43. Similarly to the right knee support member 41e, the left knee support member 42e is not connected to the left column 32, and a rectangular seat 44 is connected to the upper end of the left knee support member 42e. The left support 32 is connected to the lower surface of the seat 44.

  Thereby, the worker can use the posture holding tool 1e as a chair by sitting down on the right seat 43 and / or the left seat 44. Each seat (43, 44) may be made of a cushion material. Further, a cushion material may be arranged on at least a part of the upper surface of each of the seats (43, 44).

<3.5>
Further, for example, in the above embodiment, the posture holder 1 and the standing desk 5 are manufactured independently. However, the relationship between the posture holding tool 1 and the standing desk 5 may not be limited to such an example. For example, as illustrated in FIG. 15A and FIG. May be configured integrally.

  FIG. 15A and FIG. 15B are a rear view and a side view schematically illustrating a posture holder 1f according to the present modification. As illustrated in FIGS. 15A and 15, in the posture holding tool 1f according to the present modification, the base 2f has a flat plate-like lower surface similarly to each base portion (21c, 22c) of the posture holding tool 1c. A plate 23 and an upper plate 24 are provided. The lower plate 23 and the upper plate 24 are connected by a connecting member 26 on the rear side. Further, an elastic member 25 is arranged between the lower plate 23 and the upper plate 24 near the center in a side view. The elastic member 25 is, for example, a spring, rubber, or the like, and is configured to be able to contract so as to be lower in height than the connecting member 26. Therefore, the base 2f is configured to be capable of changing the inclination angle of the mounting surface (the upper surface of the upper plate 24) of the base 2f, similarly to the base portions (21c, 22c). However, the base 2f is not separated in the left-right direction and is integrally formed.

  Further, in the posture holding tool 1f according to the present modification, the holding mechanism 3f includes, like the above-described posture holding tool 1d, a support portion 33 and a crossbar 34 connected to the support portion 33 and extending in the left-right direction. ing. Here, the support 33 also serves as the leg 52 of the standing desk 5. That is, the top plate 50 is attached to the upper end of the support portion 33, and the top plate 50 and the support portion 33 constitute a standing desk.

  Further, in the posture holder 1f according to the present modification, the crossbar 34 is detachably connected to the support 33 by the adjustment bar 35. The adjustment bar 35 is configured by, for example, a clamp or the like. Thus, the position at which the knee support 4 is attached to the column 33 can be changed in the axial direction (vertical direction). That is, the knee support 4 is configured to be able to change the height at which each knee of the worker is supported.

<3.6>
In addition, the shape, connection method, and the like of each component according to the above embodiment can be appropriately changed according to the embodiment. For example, in the above-described embodiment, each column (31, 32) is connected to the mounting surface (211, 221) of each base (21, 22), and from each mounting surface (211, 221). It extends in a straight line. However, the shape and connection method of each support (31, 32) need not be limited to such an example, and may be appropriately changed according to the embodiment. For example, each of the columns (31, 32) may be configured as shown in FIG.

  FIG. 16 is a side view schematically illustrating a posture holder 1g according to the present modification. As illustrated in FIG. 16, the holding mechanism 3g of the posture holding tool 1g according to the present modification includes a right support 31g and a left support 32g, similarly to the above embodiment. On the other hand, each column (31g, 32g) is connected to the lower surface (212, 222) of each base (21, 22) unlike the above embodiment. Each of the struts (31g, 32g) extends in an S-shape in a side view. As described above, the shape of each component, the connection method, and the like can be appropriately changed according to the embodiment.

<3.7>
Further, for example, in the above-described embodiment, the knee support portion 4 is configured by a pair of knee support members (41, 42) that are arranged apart from each other in the left-right direction. That is, the knee support 4 is separated in the left-right direction. However, the configuration of the knee support 4 may not be limited to such an example, and the knee support 4 may not be separated in the left-right direction. For example, both knee support members (41, 42) may be integrally connected. In this case, the base 2 may be separated in the left-right direction as in the above-described embodiment, or may not be separated in the left-right direction as in the posture holder 1d.

<3.8>
Further, for example, in the above-described embodiment, the high stool 6 is configured to be able to swing in the front-rear direction because the entire lower surface 631 of the base 63 is curved. However, the method of configuring the high stool 6 to be swingable in the front-rear direction is not limited to such an example, and may be appropriately selected according to the embodiment. For example, the high stool 6 is configured to be able to swing in the front-rear direction by having at least a portion of the lower surface 631 of the pedestal portion 63 curved like the lower surfaces (212a, 222a) of the posture holder 1a. You may. In addition, for example, the high stool 6 may be configured as illustrated in FIG.

  FIG. 17 schematically illustrates a high stool 6a according to the present modification. The high stool 6a according to this modification includes a lower end portion 64 that contacts the ground at a point, instead of the pedestal portion 63 of the above embodiment. As a result, the high stool 6a is formed in a bar shape except for the seat portion 61. Therefore, as illustrated in FIG. 17, the high stool 6a can rotate the support portion 62 around the lower end portion 64 as an axis. Therefore, according to the present modification, the high stool 6a is configured to be able to swing in the front-rear direction.

  Hereinafter, examples of the present invention will be described. However, the present invention is not limited to the following embodiments. In order to examine the effectiveness of the configuration in which the inclination angle of the mounting surface in the present invention can be changed freely, posture holders according to the following examples and comparative examples were created, and when using each posture holder, the lower limb was used. An experiment was conducted to determine the load acting on the.

  First, the configuration of the posture holder according to the embodiment and the comparative example will be described with reference to FIGS. FIG. 18 schematically illustrates a basic configuration 500 of the posture holder. FIG. 19 schematically illustrates a posture holder 600 according to the embodiment. FIG. 20 schematically illustrates a posture holder 700 according to a comparative example.

  As illustrated in FIG. 18, the basic configuration 500 includes a base 501, a support 502, and a knee support 503, similarly to the posture holder 1 according to the above embodiment. The length of the base portion in the front-rear direction (left-right direction in the figure) was 30 cm, and the support portion 502 was fixed at the end of the base portion or at 5 cm. The knee support member 503 was fixed at a height of 240 mm from the mounting surface of the support portion 502. An example and a comparative example were created using two such basic configurations 500.

  Specifically, as illustrated in FIG. 19, by attaching a curved surface plate 601 to the bottom surface of the base portion 501 of each of the two basic components 500, the inclination angle of the mounting surface (upper surface) of the base portion 501. Was configured to be changeable, and a posture holder 600 according to the example was manufactured. The curvature of the curved plate 601 was 1.23 rad / m.

  On the other hand, as illustrated in FIG. 20, an inclined L-shaped plate 701 is attached to the bottom surface of the base portion 501 of each of the two basic components 500, thereby producing a posture holder 700 according to a comparative example. The length of the L-shaped plate 701 in the front-rear direction (left-right direction in the figure) was 29.8 cm.

  Next, the contents of the experiment will be described. Two subjects (first subject: male; age 45, height 163 cm, weight 63 kg), and second subject: male; age 29, height 171 cm, weight 85 kg), each of which has a chair whose seating surface is inclined forward ( After sitting on TF-200L (manufactured by Noritzis Co., Ltd.), the posture holders (600, 700) according to the above Examples and Comparative Examples were used. Then, the angle of the seat surface of the chair was set to 7 degrees or 14 degrees, and the pressure applied to the knees and soles of each subject was measured. A known body pressure distribution measurement system (BPMS: manufactured by Nitta Corporation) was used to measure the pressure applied to the knees and soles. 21A-D, 22A-D, 23A-D, 24A-D, 25A-D, 26A-D, 27A-D, and 28A-D show the results.

21A to 21D and FIGS. 22A to 22D show measurement results of the pressure applied to the knee and the sole of the first subject when the seat surface of the chair is inclined at 7 degrees. Specifically, FIGS. 21A and 21B show the body pressure distribution in each of the knees and soles when the first subject, who was seated on a chair whose seat surface was inclined at 7 degrees, used the posture holder according to the embodiment. Show. FIG. 21C and FIG. 21D show the body pressure distribution in each of the knees and soles when the first subject, who was sitting on a chair whose seating surface was inclined at 7 degrees, used the posture holder according to the comparative example. FIG. 22A and FIG. 22B show the time course of the contact pressure and the load value on the knee of the first subject who was placed on the chair whose seat surface was inclined at 7 degrees. FIG. 22C and FIG. 22D show the passage of the contact pressure and the load value with respect to the sole of the first subject on a chair whose seat surface is inclined at 7 degrees. The contact pressure indicates a load per unit area (g / cm ² ). The load value indicates a value obtained by integrating the contact pressure with the contact area (kg).

  FIGS. 23A to 23D and FIGS. 24A to 24D show measurement results of the pressure applied to the knee and the sole of the first subject when the seat surface of the chair is inclined at 14 degrees. Specifically, FIG. 23A and FIG. 23B show the body pressure distribution in each of the knee and the sole when the first subject on the chair with the seat surface inclined at 14 degrees uses the posture holding device according to the embodiment. Show. FIG. 23C and FIG. 23D show the body pressure distribution on each of the knees and soles when the first subject on a chair whose seat is inclined at 14 degrees uses the posture holder according to the comparative example. FIG. 24A and FIG. 24B show the time course of the contact pressure and the load value on the knee of the first subject who was placed on a chair whose seat surface was inclined at 14 degrees. FIG. 24C and FIG. 24D show the time course of the contact pressure and the load value on the sole of the first subject who was placed on a chair whose seat surface was inclined at 7 degrees.

  Similarly, FIGS. 25A to 25D and FIGS. 26A to 26D show the measurement results of the pressure applied to the knee and the sole of the second subject when the seat surface of the chair is inclined at 7 degrees. That is, FIGS. 25A and 25B show the body pressure distribution in each of the knees and soles when the second subject, who was seated on a chair whose seat surface was inclined at 7 degrees, used the posture holder according to the embodiment. FIG. 25C and FIG. 25D show the body pressure distribution on each of the knees and soles when the second subject on a chair whose seating surface is inclined at 7 degrees uses the posture holder according to the comparative example. 26A and 26B show the passage of time of the contact pressure and the load value on the knee of the second subject who was placed on the chair whose seating surface was inclined at 7 degrees. FIG. 26C and FIG. 26D show the elapsed time of the contact pressure and the load value on the sole of the second subject who was placed on a chair whose seat surface was inclined at 7 degrees.

  FIGS. 27A to 27D and FIGS. 28A to 28D show the measurement results of the pressure applied to the knee and the sole of the second subject when the seat surface of the chair is inclined at 14 degrees. Specifically, FIGS. 27A and 27B show the body pressure distribution in each of the knees and soles when the second subject, who was seated on a chair whose seat surface was inclined at 14 degrees, used the posture holding device according to the embodiment. Show. FIG. 27C and FIG. 27D show the body pressure distribution on each of the knees and soles when the second subject on a chair whose seating surface is inclined at 14 degrees uses the posture holder according to the comparative example. FIG. 28A and FIG. 28B show the time course of the contact pressure and the load value on the knee of the second subject who was placed on a chair whose seat surface was inclined at 14 degrees. FIG. 28C and FIG. 28D show the passage of time of the contact pressure and the load value on the sole of the second subject on a chair whose seat surface is inclined at 7 degrees. Each of the above-mentioned body pressure distributions indicates an average of a predetermined time (50 seconds) during which the pressure applied to the knee or the sole is stabilized.

  21A to 21D, FIGS. 23A to 23D, FIGS. 25A to 25D, and the body pressure distributions shown in FIGS. 27A to 27D, both the subjects are compared with the comparative example regardless of the angle of the seating surface of the chair. Thus, it was found that the posture holder according to the example exerted less burden on the lower limbs. Specifically, in the first subject, as shown in FIG. 22A to FIG. 22D, when the angle of the seat surface of the chair is set to 7 degrees, when the posture holding device according to the example is used, Both applied loads decreased. In addition, as shown in FIGS. 24A to 24D, when the angle of the seat surface of the chair was set to 14 degrees, the use of the posture holder according to the example reduced the load acting on the knee. On the other hand, in the case of the second subject, as shown in FIGS. 26A to 26D and FIGS. By using, the load acting on the sole was reduced.

  Therefore, according to the above experiment, the load acting on at least one of the knee and the sole can be reduced irrespective of the angle of the seat surface of the chair and the attributes of the subject by configuring the inclination angle of the mounting surface to be changeable. I understood. That is, according to the posture holding device of the present invention, it has been found that the load on the lower limb of the worker can be reduced while performing the work. The difference in the portion where the load decreases between the first subject and the second subject is considered to be due to the sitting style, body shape, and the like of both subjects.

  In addition, as shown in FIG. 22A, FIG. 22C, FIG. 24A, FIG. 24C, FIG. 26A, FIG. 26C, FIG. 28A, and FIG. Therefore, according to the posture holding device of the present invention, the load acting on the knee and the sole can be distributed evenly throughout the respective parts by changing the inclination angle of the mounting surface. Do you get it. That is, it has been found that the load can be prevented from being concentrated on the local portions of the knee and the sole of the foot, and also from this point, the load applied to the lower leg of the worker during the operation can be reduced.

1 ... posture holding tool,
2. Base,
21: right base portion, 211: mounting surface, 212: lower surface,
22: left base portion, 221: mounting surface, 222: lower surface,
3 holding mechanism, 31 right support, 32 left support,
4 ... knee support part, 41 ... right knee support member, 42 ... left knee support member,
5 Standing desk, 51 Top plate, 52 Legs,
6 ... high stool, 61 ... seat, 62 ... support, 63 ... pedestal, 631 ... lower surface,
1a: posture holder,
2a: base, 21a: right base, 212a: lower surface,
22a: left base portion, 222a: lower surface,
1b: posture holder,
2b ... base,
21b ... right base part,
213: lower plate, 214: upper plate, 215: elastic member,
216 ... Connecting member,
22b: Left base part,
223: lower plate, 224: upper plate, 225: elastic member,
226 ... connecting member,
1c: posture holder, 2c: base,
217/227 ... support shaft member,
1d: posture holder, 2d: base,
3d: holding mechanism, 33: support, 34: crossbar,
1e: posture holder,
4e: knee support, 41e: right knee support, 42e: left knee support,
43 ・ 44… Seat,
1f ... posture holding tool,
2f: base, 23: lower plate, 24: upper plate, 25: elastic member,
26 ... connecting member,
3f: holding mechanism, 33: support portion, 34: crossbar, 35: adjustment bar,
50 ... top plate,
1g ... posture holder,
3g: holding mechanism, 31g: right support, 32g: left support,
6a: high stool, 64: lower end,
100 ... Standing desk,
200: posture holder, 201: high stool, 202: footrest

Claims (10)

A base having a mounting surface on which the worker places his / her feet, and the mounting surface is configured to be tiltable forward;
A holding mechanism coupled to the base and extending upward from the base;
A knee support portion held by the holding mechanism at a height capable of supporting the front of each knee of the worker who puts a foot on the base,
With
The base is configured to be capable of freely changing the inclination angle of the mounting surface ,
The base is configured such that at least a part of the lower surface of the base is curved, so that the inclination angle of the mounting surface can be freely changed.
Posture holder. The knee support portion includes a pair of knee support members that are arranged left and right apart from each other.
The posture holding device according to claim 1. Each of the pair of knee support members is configured to be capable of changing a height of supporting the worker's knee,
The posture holding device according to claim 2. Each of the pair of knee support members is configured to be capable of changing a tilt for supporting the worker's knee,
The posture holding device according to claim 2. The pair of knee support members are configured to be able to change the distance separated in the left-right direction,
The posture holding device according to claim 2. The base is configured to be divided into a right base portion and a left base portion,
The holding mechanism includes a right column connected to the right base, and a left column connected to the left base,
The right knee support member of the pair of knee support members is held by a right support,
The left knee support member of the pair of knee support members is held by a left support.
The posture holder according to any one of claims 2 to 5. A standing desk for workers to work in a standing position,
A posture holder according to any one of claims 1 to 6 ,
Furniture set with. A high stool that allows workers working in a standing position to sit down,
A posture holder according to any one of claims 1 to 6 ,
Furniture set with. The high stool is configured to be swingable in the front-back direction,
The furniture set according to claim 8 . The high stool has a pedestal portion arranged on the ground,
The high stool is configured so that at least a part of the lower surface of the pedestal portion is curved, so that it can swing in the front-rear direction.
The furniture set according to claim 9 .