JP2020039985A - Chair - Google Patents

Abstract

To eliminate puzzlement of a seated user by notifying of a swing function in a chair that laterally swings by following up a motion of a seated person, and also to materialize safe and well-controlled swing movement by accurately regulating a swing angle.SOLUTION: The chair is composed of a seat 1 and legs 2, with the legs 2 having a lower frame body 6 and props 7. By bending projectingly downward the front member 6a and the rear member 6c of the lower frame body 6, the chair as a whole is allowed to swing laterally. In the left and right ends of the front member 6a, there are conspicuously provided stoppers 12 of a spherical shape for example. As the stoppers 12 are raised from the floor, a person who sees it for the first time can grasp the swing function of the chair. The swing movement is regulated by the stoppers 12, so that there is no movement by inertia, which can materialize safe and well-controlled movement.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a chair that can swing left and right following a seated person moving (shaking) his / her upper body left and right.

  The chair is generally stably placed on the floor, but the lower end surface (ground surface) of the leg is formed to be downwardly convex when viewed from the front, so that it can swing left and right following the left-right movement of the seated person. Patent Literature 1 discloses a configuration in which a seat is provided, and as one version, the seat surface is recessed downward so that the seat surface follows the roundness of the body (buttocks and thighs) of a seated person. did.

Japanese Patent Application No. 2017-97353

  In recent years, the importance of worker health management in the office has been pointed out. Therefore, if a swing-type chair that has a function as an exercise tool and can contribute to a change of mood and promote blood circulation can be effectively used in the office, It is useful for both the user and the manager, but if the seat surface is depressed as in Patent Literature 1, there is an image that the user's body stability is excellent and it is easy to sit visually, so there is no discomfort even in the office It can be used, and it can be said that the range of use can be expanded.

  In addition, chairs that swing back and forth as chairs for infants and the elderly have existed for a long time, but chairs that allow the occupant to swing left and right actively are novel, and the surrounding environment is softened by unexpectedness and a kind of playfulness. It also has the effect of being able to contribute to the improvement of the office environment and the environment such as business talks.

  As described above, the swing type chair has an excellent effect.For example, when used as a chair used by an unspecified person, such as a chair installed at a window of various facilities, the swing function is known. There is a concern that the first time a non-contact person comes into contact, the movement of the body will tilt the chair and give confusion. Even if the chair is tilted, it is easy to understand that the chair has such a function, but it can be said that it is user-friendly if the chair has a swing function in a state before use. Also, it is safe to be able to regulate the swing amount by restricting the movement due to the inertia.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a more improved swing type chair.

  The present invention includes a seat and a leg for supporting the seat, as described in claim 1, wherein the lower end surface of the leg is formed in a downwardly convex shape in front view in which a vertex is located at a middle portion between left and right sides. The seat and the leg are integrally swingable from side to side, and stoppers for contacting the floor are protruded downward on both left and right sides of the lower end surface of the leg.

The present invention can be variously developed. As a preferred example, in claim 2, in claim 1, the lower end portion of the leg that rests on the floor has a left-right horizontally long front member and left and right side members extending rearward from both left and right ends thereof. The stopper is disposed at or near a corner where the front member and the side member are connected to each other so as to be exposed to human eyes.

  According to a third aspect, in the first or second aspect, at least a lower surface of the stopper is formed as a rounded curved surface. According to a fourth aspect of the present invention, in any one of the first to third aspects, the stopper is attached to a bolt or a nut provided on the leg by screwing.

  In the present invention, as in Patent Document 1, it is preferable that the upper surface (seat surface) of the seat be recessed so that the buttocks and thighs of the occupant fit (wrap around from below).

  When the chair swings or is fully inclined, a large force acts on the floor as a moment. For this reason, if the end of the leg directly hits the floor, the floor may be easily damaged. However, if a stopper is provided as in the present invention, the stopper is provided with a buffer function to prevent the floor from being damaged or damaged. It can be suppressed.

  In addition, since the swing motion is regulated (defined) by the stopper, a sharp swing motion can be realized, and the swing amount is kept constant even if the force applied by the user to the chair is different, so that it is safe. . In other words, if a downward stopper is provided, if the stopper hits the floor and is to be further swung, it must be rotated with the stopper as a fulcrum, but this requires a very large amount of kinetic energy. In the state, the swing amount is accurately defined even if the magnitude of the kinetic energy for shaking the body is different, and therefore, there is no excessive swing due to inertia.

  In addition, it is possible to swing the chair further even after the stopper comes into contact with the floor by applying a very large acceleration according to the user's will. In this case, the maximum swing amount is the kinetic energy of the person. It will depend on the size.

  Further, by providing the stopper in a state where it can be seen by the user as in claim 2, the user can visually grasp that the chair has a swing function, so that the chair is used by an unspecified number of people. Even when used, it is possible to prevent the chair from leaning and becoming confused after sitting down.

  That is, since the stopper is floating from the floor, the chair is tilted and the person immediately understands that the stopper touches the floor, so that the person immediately grasps that it is a swing type chair. Therefore, it is possible to prevent a situation in which the user is confused after sitting down. In this case, it is more preferable to form the stopper in a conspicuous color such as red or green because visibility is enhanced. If a color different from the leg color, especially a warm color, is adopted, it can be said that the visibility is improved.

  If at least the lower surface of the stopper is formed as a curved surface as described in claim 3, even if there is a slight difference in the attitude of the stopper due to a manufacturing error or the like, or the floor has irregularities, the stopper comes into point contact with the floor. Contact and stable contact function can be secured. That is, a stable contact state can be ensured by absorbing an attachment error or the like. In addition, when the stopper is formed in a spherical shape, the stopper is in a swollen state and has a large surface area, so that the visibility can be further improved when viewed from the front of the chair or from the side.

Adopting the method of mounting by screwing as in claim 4 can reduce the labor and labor of assembling the chair, and also facilitate replacement when the chair is damaged. In addition, if the color of the stopper is different from the color of the chair, an aesthetic feature like a one-point mark occurs, but it is easy for the user to replace the stopper with a different color according to his / her preference. Furthermore, if a plurality of types of stoppers having different heights are prepared, it is possible to easily change the swing angle (more precisely, the minimum swing angle).

1A is a perspective view seen from the front, FIG. 2B is a perspective view seen from behind, FIG. 1C is an exploded perspective view, and FIG. 1D is a perspective view seen from below. (A) is a front view, (B) is a bottom view. (A) is a side view, (B) is a rear view, and (C) is an isolated perspective view of a main part. 1A is a partial front view, FIG. 1B is a partial side view, and FIG. 1C is a perspective view as viewed from the direction of arrow IIIC in FIG.

(1) Structure of First Embodiment Next, an embodiment of the present invention will be described with reference to the drawings. In the following, words of front, rear, left and right are used to specify the direction, but the front, rear, left, and right are based on the direction of a normally seated person. The front view direction is a direction facing the seated person.

  As can be understood entirely from FIG. 2, in the present embodiment, the chair includes a seat 1 and legs 2 supporting the seat. The seat 1 includes a wooden or resin seat plate 3 and a cushion material 4 stretched on the upper surface thereof, and the cushion material 4 is covered with a skin material (not shown). The seat 1 is substantially square in plan view and has a rounded corner.

  The seat 1 (the seat plate 3 and the cushioning material 4) is gently curved downward (concave) so as to be upwardly concave in a front view, and the rear end is gently curved upward in a vertical side view. It has become. That is, the upper surface of the seat 1 (the upper surfaces of the seat plate 3 and the cushion material 4) is a concave surface that fits the curved surface of the seated person with the buttocks and thighs. In addition, the seat 1 is inclined forward as a whole (the seat 1 may be in a horizontal posture or may be in a rearwardly inclined posture). At the rear end of the seat 1, a belt puller 5 used for pulling and moving the chair is provided.

  The legs 2 are made of metal pipes or rods. The lower frame 6 rests on the floor, the left and right columns 7 rising from the left and right ends of the front end of the lower frame 6, An upper frame 8 provided at an upper end is provided. A bracket 9 is fixed to the upper frame 8, and the seat plate 3 is fixed to the bracket 9. The lower end of the support 7 is located at the front end of the seat 1 in plan view, but the upper end of the support 7 is located slightly behind the front end of the seat 1 (closer than the front-rear intermediate position of the seat 1). ing. Therefore, the column 7 is inclined backward at a gentle angle.

  The lower frame body 6 has a left-right horizontally long front member 6a, a front-rear long left-right side member 6b, and a rear member 6c connected to the rear end of the left-right side member 6b. The rear corner portion 6d connected to the rear corner portion 6c is curved in a plan view. Therefore, the side member 6b and the rear member 6c are U-shaped in plan view. A reinforcing member is fixed to a connection between the front member 6a and the side member 6b.

  The front end of the side member 6b is welded to the front member 6a, and the support members 7 are bent at the left and right ends of the front member 6a. The upper frame 8 is formed by bending the upper end of the column 7 backward and then further inward. Therefore, the upper frame 8 also has a generally forward opening U shape in plan view. The front member 6a is a front contact part.

  As shown in FIG. 2, the left and right ends of the front member 6 a constituting the lower frame 6 protrude to the left and right outside of the seat 1 in plan view. Therefore, high stability can be ensured even during a swing, and a plurality of chairs can be stacked up and down. That is, the lower frame 6 of the upper chair can be fitted behind the left and right supports 7 of the lower chair, and the chairs can be stacked up and down. Therefore, it is advantageous for storage when not in use.

  The bracket 9 includes a U-shaped frame 9a that opens rearward in a plan view, and a lip 9b that projects inward from the frame 9a. The frame 9a is fixed to the upper frame 8 by welding. , Lip 9b is fixed to seat plate 3 by screws inserted from below. When the bracket 9 is provided as in the present embodiment, the seat 1 can be firmly fixed while the upper frame 8 is arranged outside the seat 1. In addition, since the bracket 9 projects forward from the upper end of the column 7, the seat 1 can be firmly and stably fixed to the leg 2 even when the column 7 is inclined backward.

  The front member 6a of the lower frame 6 is bent in a downwardly convex rectangular shape when viewed from the front, and the middle portion between the left and right is a vertex. A front grounding body 10 made of resin is fixed to the apex from below. On the other hand, the rear member 6c of the lower frame 6, which is the rear ground contact portion, is gently curved in a concave shape facing forward in plan view, and is smoothly continuous with the side member 6b. The rear grounding body 11 made of resin is fixed to the rear member 6c from below, and the rear grounding body 11 extends to the rear corner 6d.

  As shown in FIG. 3B and FIG. 4A, the rear member 6c (or the rear ground contact body 11) is slightly curved downward and convexly in a rear view (and a front view). Is smaller than the bending angle of the front member 6a. That is, the height difference between the left and right ends of the rear member 6c is smaller than the height difference between the left and right ends of the front member 6a. The chair can be swung right and left (tilted) as a whole due to the difference in form of the lower surface between the front member 6a and the rear member 6c.

  As shown in FIG. 4B, the rear corner 6d appears to be gently curved upward (convex) in a side view, but is viewed from a diagonal direction as shown in FIG. 4C. , And is gently curved in a downward convex shape. Such a difference in appearance is due to the rear corner portion 6d being curved in a plan view. Then, since the rear corner portion 6d is gently curved in a downwardly convex shape as viewed from the diagonal direction, the rear member 6c (the rear ground contact body 11) smoothly touches the floor when the chair swings ( In other words, the ground contact point of the back grounding body 11 on the floor swings while smoothly moving.)

  At the left and right end portions of the front member 6a, stoppers 12 that come into contact with the floor in a state where the swing has been completed are protruded downward. Accordingly, the height difference between the stopper 12 and the floor is the maximum swing height difference. The stopper 12 is made of resin and is formed in a spherical shape, and is attached by screwing to a bolt (screw) 13 provided at the left and right end portions of the front member 6a. The bolt 13 uses a so-called enamel set. A metal nut is embedded in the stopper 12 by insert molding. Further, the stopper 12 is located near the front corner portion, which is a connection portion between the front member 6a and the side member 6b, but may be attached to the front end of the side member 6b.

  It is also possible to provide a blind nut or the like on the front member 6a and provide a bolt on the stopper 12. In this case, a bolt may be integrated with the stopper 12 by insert molding or the like. The stopper 12 may be made of metal and may be covered with a cushioning material such as rubber. In this case, a female screw or a male screw may be integrated with the stopper.

  The rear member 6c can be formed in a trapezoidal shape when viewed from the front (and when viewed from the rear), or can be bent in a rectangular shape. Alternatively, it is also possible to form the whole horizontally.

(2) .Summary As described above, the chair swings from side to side when the occupant shakes the body from side to side, so the chair can be used as a vibrator to relax or relax and promote blood circulation. it can. When both feet are placed on the front member 6 a of the lower frame 6, the swing can be performed dynamically. However, since the column 7 is inclined backward, the seated person can place the foot on the front member 6 a of the lower frame 6. Also, the foot does not hit the strut 7 and is easy to use.

  In the present embodiment, since the degree of bending of the front member 6a is steeper than the degree of bending of the rear member 6c, the amount of displacement of the front member 6a is larger than the amount of displacement of the rear member 6c during a swing. For this reason, the seat 1 (or the occupant) moves (forward) while moving (tilting) outward and right and left. For this reason, a person can always swing while holding his / her feet so that they can be stuck on the floor. Therefore, it is possible to swing dynamically while ensuring stability.

  Further, when the front member 6a is fully rotated, the stopper 12 hits the floor, so that the swing angle can be accurately defined and the rotation by inertia can be prevented. That is, a sharp swing can be realized.

  Since the upper surface of the seat 1 is recessed downward to fit the body of the seated person, the seat 1 does not tilt due to slight movement of the center of gravity. Therefore, in performing work or work, the seated person can take a correct posture in a relaxed and natural state without unconsciously applying force to the foot, and can prevent stiffness and fatigue.

  On the other hand, for example, when actively swinging for a change of the body, since the seat 1 is fitted to the body, there is no tendency to be shaken off from the seat 1 even if the body moves dynamically, Swing exercise can be performed with confidence. Furthermore, since the fitting property can be grasped visually and it can be used without discomfort, it can be widely used for work and learning.

  The stoppers 12 are prominent at the left and right ends of the front member 6a, but since the stoppers 12 are floating from the floor, even a person who has seen this chair for the first time can immediately recognize that it is a swing type. Can understand. Therefore, even if the chair is shaken by moving the body after sitting, the user can enjoy the swing without confusion.

  When the rear member 6c is formed in a substantially U shape in plan view as in the present embodiment, the length of contact with the floor can be lengthened, so that the swing movement can be made smooth. Further, as described above, the rear member 6c and the rear corner portion 6d are gently curved in a downwardly convex shape, and the ground contact point moves smoothly during the swing, so that a smooth swing motion can be realized.

  By the way, as already described, in front view, the degree of bending of the rear member 6c is smaller than the degree of bending of the front member 6a. Therefore, as shown in FIGS. The maximum height difference H1 between the floor and the floor is smaller than the height difference H2 between the stopper 12 and the floor. In the present embodiment, H2 is about 1.5 times H1. Due to such a height difference, the line 14 connecting the end of the rear ground contact body 11 and the stopper 12 is slightly inclined with respect to the floor surface.

The stopper 12 hits the floor at the final stage of the swing. Until the stopper 12 hits the floor, the chair is in a two-point support state between the middle part of the front member 6a and the rear grounding member 11, Normally, the swing stops when the intermediate portion of the front member 6a, the end of the rear ground contact body 11, and the stopper 12 hit the floor and are in a three-point support state. In this case, the swing angle is defined by the stopper 12 coming into contact with the floor in a point contact state.

  Further, since the maximum height H1 of the rear contact body 11 (more precisely, the maximum height of the final contact position of the rear contact body 11 and smaller than H1) and the height H2 of the stopper 12 are different, two points are required. In the stage from support to three-point support, the chair tends to lean forward without much tilt in the left-right direction. Accordingly, the state in which the rear ground contact body 11 is in contact with the floor smoothly transitions to the contact of the stopper 12.

In this case, the grounding position of the rear grounding body 11 moves toward the rear corner 6d during the swing. However, since the rotation fulcrum at the front end of the chair is constant at the front grounding body 10, the chair turns. The moving center line is shifted from the complete longitudinal position shown by reference numeral 15 in FIG.
The state shifts to the inclined posture in plan view. Accordingly, the chair (and the body) is also rotating toward the front side while rotating in the left-right direction, and accordingly, the stopper 12 smoothly transitions to a state in which it comes into contact with the floor. In addition, since the rear ground contact body 11 is curved in a circular arc shape in a plan view, the forward tilting movement while moving left and right is very smooth.

As a result, when the stopper 12 comes into contact with the floor, it does not stop with a feeling of rattling, and a smooth and safe swing can be realized. In addition, due to the height difference between H1 and H2, when shifting from the two-point support state to the three-point support state, the tendency of forward leaning is increased, thereby reducing the swing momentum and increasing safety. The height of the final contact position of the rear contact body 11 and the height of the stopper 12 may be the same, and in any case, the position of the stopper 12 may be anywhere.

  In a normal use state, the swing stops when the stopper 12 touches the ground, but when the user shakes the body very much in search of more active movement, it is possible to overswing more than the angle regulated by the stopper. is there. In this overswing state, the chair and the body rotate in a two-point support state around a line connecting the end of the back grounding body 11 and the stopper 12, but the back grounding body 11 and the stopper 12 Since the connecting lines are longitudinally longitudinal, they rotate substantially in the left-right direction. Then, when the return force due to the own weight of the seated person and the kinetic energy due to the swing are balanced, the overswing is stopped and the return swing is performed.

  The present invention can be embodied in various other ways. For example, the lower ends of the legs do not have to have the frame structure as in the embodiment, and a plate-like form or the like can be adopted. In addition, it is also possible to provide a support at an intermediate portion of the leg. It can also be applied to chairs with backrests. Although the stopper of the embodiment is a single-piece resin product, the outer peripheral portion may be made of a soft material such as rubber. Further, it is also possible to configure the left and right stoppers in a plural number arranged in front and rear, respectively, and to simultaneously ground the plural stoppers. Alternatively, a plurality of stoppers can be sequentially grounded.

  The present invention can be actually embodied in a chair. Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 seat 2 leg 3 seat plate 6 lower frame 6a constituting a leg 6a front member 6b of a lower frame 6b side member 6c of a lower frame 6c rear member 6d of a lower frame 6d rear corner portion 5 supporting column 6 constituting a leg Upper frame 7 to be mounted 7 Bracket 10 Front grounding body 11 Rear grounding body 12 Stopper 13 Bolt

Claims (4)

It has a seat and a leg for supporting the same, and the lower end surface of the leg is formed in a downwardly convex shape in a front view in which a vertex is located at an intermediate portion between the left and right, so that the seat and the leg are integrally formed on the left and right sides. It is a configuration that can swing to
On both left and right sides of the lower end surface of the leg, stoppers that contact the floor are protruded downward.
Chair. The lower end of the leg resting on the floor has a horizontally long front member and left and right side members extending rearward from both left and right ends thereof, and the stopper is a corner where the front member and the side member are connected. Or in the vicinity of it, it is placed in an exposed state so as to be visible to the public,
The chair according to claim 1. At least the lower surface of the stopper is formed in a rounded curved surface,
The chair according to claim 1. The stopper is attached by screwing to a bolt or nut provided on the leg,
The chair according to any one of claims 1 to 3.

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