JP2017205151A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair a plurality of which can be piled up vertically and whose piled-up state is stable.SOLUTION: A chair includes a seat part 10, a pair of joint parts 20 which project from the seat part sideways in the opposite direction, two pairs of leg parts 30 in which a pair extends downward per joint part and which are more separate the more downward they go, and a long flat-shaped ground contact surface part 40 which joins adjacent leg parts in pair at a lower end. In the chair, the joint parts have upper curved surfaces 21 curved in a recessed shape reversing the shape of outer peripheral surfaces of the leg parts on respective outer peripheral surfaces of end parts in a back and forth direction in which the pair of leg parts are apart from each other, and have lower curved surfaces 41 which curve the ground contact surface part into a recessed shape reversing the shape of the outer peripheral surfaces of the leg parts near lower ends of the respective legs parts and are opened inside in the back and forth direction.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a chair capable of stacking a plurality.

  When a person gathers in a place where chairs are not permanently installed, a necessary number of chairs may be taken out from the stored chairs, and may be returned to the storage place after use. In such a case, if a plurality of chairs can be stacked when not in use, the storage space is small, which is convenient.

  As chairs that can be stacked, there are chairs that are stacked while shifting their positions so that the legs of the upper and lower chairs do not overlap each other after the legs protrude outward from the seat. In such a chair, the center of gravity moves to the side with the stacking, and the stacked state becomes unstable and may collapse.

  On the other hand, chairs that are stacked so that the legs of the lower chair fit between the legs of the upper chair have also been proposed (see, for example, Patent Document 1). The chair of patent document 1 expands the leg part attached outward from the seat part so that it goes below. At first glance, it seems that a chair with such a configuration can be stacked directly above. However, in actuality, the displacement is unavoidable due to slippage between members. Therefore, with the stacking operation, the direction of stacking in multiple stages is inclined, and the stacked state may become unstable.

JP 2000-79033 A

  Then, this invention makes it a subject to provide the chair which can be piled up directly on top of the above-mentioned situation, and the piled-up state is stabilized.

In order to solve the above problems, a chair according to the present invention is
"With the seat,
A pair of joints projecting laterally opposite from the seat,
A pair is attached to each joint part, each extends downward, and two pairs of long leg-shaped leg parts that are separated from each other toward the bottom,
A long flat plate shape connecting two of the two adjacent leg portions at the lower end of the two pairs of leg portions, and a flat plate shape provided at the lower end together with the leg portions,
It has
The joint portion is curved in a concave shape obtained by inverting the shape of the outer peripheral surface of the leg portion on the outer peripheral surface of each end portion in the front-rear direction, which is a direction in which the pair of leg portions are separated from each other. Has a surface,
The grounding surface portion has a lower curved surface that is curved in a concave shape obtained by inverting the shape of the outer peripheral surface of the leg portion in the vicinity of the lower end of each leg portion, and that is open inward in the front-rear direction. Is.

  Here, the “ground plane portion” provided at the lower end of the leg portion for grounding the leg portion is “a long plate connecting two adjacent leg portions at the lower end of the two pairs of leg portions. Can be selected, or “a flat ground surface portion provided at the lower end of each leg portion”. In the former case, the two legs connected by the long flat plate-shaped grounding surface can be paired legs, that is, two legs extending from the same joint. . Or it can be set as the structure which is two legs which belong to a different pair, Comprising: Two legs on the same side in a chair are connected by the long flat plate-shaped grounding surface part.

  The chair of this configuration includes two pairs of leg portions. The pair of leg portions extend downward from the joint portion and are spaced apart from each other, and the joint portion projects laterally from the seat portion. Therefore, the upper and lower chairs can be stacked so that the pair of legs of the lower chair is positioned between the pair of legs of the upper chair without interfering with each other. Generally, when the leg portions that are expanded toward the lower side are stacked up and down, the outer portion of the peripheral surface of the lower leg portion comes into contact with the inner portion of the peripheral surface of the upper leg portion.

  In this regard, in this configuration, there is a possibility that the joint portion may come into contact with the leg portion of the upper chair, that is, the outer peripheral surface of each end portion in the front-rear direction, which is a direction in which the pair of leg portions are separated from each other. The upper curved surface is curved in a concave shape in which the shape of the outer peripheral surface of the leg is inverted. In addition, in the ground contact surface part where the leg part is installed, the part that contacts the leg part of the lower chair, and the inner part in the front-rear direction, that is, the part that faces the other side of the paired leg part is opened. The lower curved surface curved in a concave shape obtained by inverting the shape of the outer peripheral surface of the leg portion. Therefore, when stacking up and down, the movement of the upper chair leg is guided by the upper curved surface of the lower chair, and the lower curved face movement of the upper chair is guided by the lower chair leg. . Thereby, it is possible to stack a plurality of chairs straight up without shifting the stacking direction, and the stacked state is stabilized.

The chair according to the present invention has the above-described configuration,
“The grounding surface portion is a pair of long plate-like members connecting two of the adjacent leg portions at the lower end,
It further includes a pair of reinforcing bars that connect the legs that are not connected to each other at the ground contact surface at a position higher than the ground contact surface.

  In this configuration, the grounding surface portion provided at the lower end of the leg portion for grounding the leg portion is a pair of long plate-like grounding surface portions that connect two adjacent pairs of the two leg portions. . Therefore, the ground contact area is larger than when each leg is grounded via a separate ground surface. Thereby, friction with the floor surface on which the chair is placed can be reduced, and the chair can be moved so as to be dragged on the floor surface. For example, even when the chair is used on the floor surface of a tatami mat, the possibility of damaging the tatami surface can be reduced, and the chair can be easily slid and moved like a bag.

  In addition, this configuration has a pair of “reinforcing bars” that connect the legs that are not connected by the same ground plane. Thereby, since all of two pairs of leg parts are connected by the frame which consists of a pair of grounding surface parts and a pair of reinforcement bars near each lower end, the rigidity of a chair is high. In addition, the reinforcing bar connects the leg portions at a position higher than the ground surface portion, and does not contact the floor surface. Therefore, the rigidity of the chair is enhanced without deteriorating the frictional resistance with the floor and without impairing the action of the ground contact surface that can be easily moved on the floor.

The chair according to the present invention has the above-described configuration,
“The joint portion is fixed to the seat portion via a fixing portion that is in contact with the bottom surface of the seat portion,
In a side view in which the direction in which the pair of legs are separated from each other is the left-right direction, a point where lines extending from the inner contour lines of the pair of legs intersect and outer contour lines of the pair of legs The angle of inclination of the leg portion is set so that the distance between the points where the lines extending from the crossing point are substantially the same as the thickness of the seat portion ”.

  With this configuration, as will be described in detail later, a plurality of chairs are stacked one above the other, and the lower chair seat is in a state where the upper chair legs and the lower chair legs are in close proximity. The gap between the seat and the seat of the upper chair can be a length corresponding to the height of the fixed portion, which is the minimum distance. Thereby, the height as a whole of many stacked chairs can be suppressed, and a larger number of chairs can be stored in a limited storage space.

  Further, in this configuration, when a plurality of chairs are stacked up and down, the upper seat portion is placed on the lower seat portion via the fixing portion. Therefore, the state in which a plurality of chairs are stacked one above the other is more stable than in the case where there is a large gap between the lower seat and the upper seat.

  In this configuration, “substantially the same” means “a point where lines extending from the inner contour lines of the pair of legs intersect each other in a side view in which the direction in which the pair of legs separate is the left-right direction. And a point where a line extending from the outer contour line of each of the pair of legs intersects (hereinafter, simply referred to as “distance between intersections of inner and outer contour lines”) is In addition to the case where the thickness of the part is almost the same, it means that the thickness of the part is the same including an error in manufacturing this type of chair. Specifically, it is assumed that the distance between the intersections of the inner and outer contour lines is “(thickness of the seat) ± (2% of the thickness of the seat)”.

  As described above, as an effect of the present invention, it is possible to provide a chair in which a plurality can be stacked immediately above and the stacked state can be stabilized.

It is a perspective view of the chair which is one embodiment of the present invention. It is the enlarged view of (a) A range in FIG. 1, and (b) the enlarged view of B range. It is (a) front view and (b) side view of the chair of FIG. It is CC sectional view taken on the line in Fig.3 (a). It is sectional drawing cut | disconnected by the cutting line equivalent to CC line about the state which piled up the chair of FIG. It is a perspective view of the state which piled up the chair of FIG. (A)-(c-3) It is a figure explaining the relationship of the thickness of the seat part in the setting of the inclination-angle of a leg part. (A)-(c-3) It is a figure explaining the relationship of the height from the floor surface of a seat part in the setting of the inclination-angle of a leg part. It is a side view of the state which stacked the chair of other embodiments of the present invention.

  Hereinafter, a chair 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9.

  The chair 1 is a chair without a backrest, and a seat part 10, a pair of joint parts 20 projecting from the seat part 10 to the opposite sides, respectively, and a pair are attached to each joint part 20. Two pairs of long rod-like leg portions 30 extending downward, and a long flat plate-shaped grounding surface portion 40 connecting two adjacent leg portions 30 of the two pairs of leg portions 30 at the lower ends. It has.

  More specifically, the seat 10 is a flat, substantially rectangular parallelepiped that is rectangular in plan view, and includes a rectangular and flat seat base 11 and a cushion 12 fixed to the upper surface of the seat base 11.

  Each of the pair of joint portions 20 is a substantially rectangular parallelepiped, and protrudes laterally from the pair of short sides in the seat base 11. Each joint part 20 is integral with the fixed part 60. The fixing portion 60 is a flat plate shape smaller than the seat base 11, and is fixed to the seat base 11 with its upper surface in contact with the bottom surface of the seat base 11. Thus, the pair of joint portions 20 are fixed to the seat base 11 via the fixing portions 60, respectively.

  The leg 30 is cylindrical or columnar. A pair of upper ends of the two pairs of leg portions 30 are fixed to one bottom portion of the pair of joint portions 20 and extend downward, and the upper ends of the other pair of leg portions 30 are connected to the pair of joint portions 20. It is fixed to the other bottom and extends downward. The pair of leg portions 30 are separated from each other downward.

  And in this embodiment, the leg parts 30 which make a pair among two pairs of leg parts 30 are connected by the long flat plate-shaped grounding surface part 40 by the lower end. Further, of the two pairs of legs 30, the legs 30 that are not connected by the ground plane 40, in other words, the legs 30 that belong to different pairs and are on the same side in the chair 1. Are connected by a reinforcing bar 50. The reinforcing bar 50 is cylindrical or columnar, and connects the two leg portions 30 at a position higher than the ground contact surface portion 40.

  In the present embodiment, each of the joint portion 20 and the ground contact surface portion 40 has a special shape corresponding to the shape of the outer peripheral surface of the leg portion 30. Specifically, the joint portion 20 has an upper curved surface 21 on the outer peripheral surface of each end portion in the front-rear direction (in the figure, the X direction), which is the direction in which the pair of leg portions 30 are separated from each other. . The upper curved surface 21 is a concave curved surface obtained by inverting the circumferential surface that is the shape of the outer peripheral surface of the leg 30, and the rectangular parallelepiped is notched in a concave shape from the upper and outer corners to the side circumferential surface. Shape.

  On the other hand, the grounding surface portion 40 has a lower curved surface 41 in the vicinity of a portion where the lower ends of the leg portions 30 forming a pair are connected. The lower curved surface 41 is curved in a concave shape obtained by inverting the circumferential surface, which is the shape of the outer peripheral surface of the leg portion 30, and is on the inner side in the front-rear direction X, that is, on the side facing the counterpart of the paired leg portions 30. It is open.

  Here, the inclination angle of the leg portion 30 intersects with a line N obtained by extending the inner contour line of each of the pair of leg portions 30 in a side view (see FIG. 3B) in which the front-rear direction X is the left-right direction. The distance between the point and the point at which the line M extending the outer contour line of each of the pair of leg portions 30 intersects (the distance between the intersection points of the inner and outer contour lines) is substantially the same as the thickness of the seat portion 10. Is set to This will be described below with reference to FIGS.

  As shown in FIGS. 7 (a-1), (b-1), and (c-1), if the angles formed by the pair of leg portions 30 are different (θ1, θ2, θ3, respectively), the pair of leg portions 30 respectively. The distance between the point where the line N extending the inner contour line of the crossing point and the point where the line M extending the outer contour line of each of the pair of leg portions 30 intersects is D1, D2, D3, respectively. Is different. Correspondingly, as shown in FIGS. 7 (a-2), (b-2), and (c-2), the thicknesses of the seat portions 10 of the chairs 1a, 1b, and 1c are set to D1, D2, and D3, respectively. And set. Then, as shown in FIGS. 7 (a-3), (b-3), and (c-3), the same chair is stacked up and down, and the leg 30 of the upper chair and the leg 30 of the lower chair Are in contact with each other, the seat 10 of the upper chair and the seat 10 of the lower chair are in contact.

  The relationship between the inclination angle of the leg portion 30 and the thickness of the seat portion 10 is as follows. The height of the seat portion 10 (the height from the bottom surface of the ground contact surface portion 40 to the seat portion 10, that is, from the floor surface to the seat portion 10). It has nothing to do with height. For example, as shown in FIG. 8 (a), when the inclination angle of the leg 30 is an angle θ1 and the distance between the intersections of the inner and outer contour lines is D1, the height of the seat 10 is D1. 8 (b-1) and (b-2), as shown in FIGS. 8 (c-1) and (c-2), respectively, even if the height of the seat 10 is different from h1 and h2, there is a relationship. Absent. As shown in FIGS. 8B-3 and 8C-3, the chairs 1a and 1d set as described above are stacked in the same manner, and the upper chair leg 30 and the lower chair are stacked. The seat portion 10 of the upper chair and the seat portion 10 of the lower chair are in contact with each other in a state where the leg portion 30 is in contact.

  Actually, in the chair 1 of the present embodiment, the fixing portion 60 is fixed to the bottom surface of the seat portion 10. Therefore, the leg 30 of the upper chair 1 and the legs of the lower chair 1 in a state where the seat 10 of the upper chair 1 is placed on the seat 10 of the lower chair 1 via the fixing portion 60. A slight clearance corresponding to the thickness of the fixing portion 60 is generated between the portion 30 and the portion 30. That is, with the distance between the lower seat portion 10 and the upper seat portion 10 being the minimum (thickness of the fixing portion 60), the upper leg portion 30 is in close proximity to the lower leg portion 30. It will be in the state.

  As described above, according to the chair 1 of the present embodiment, the paired leg portions 30 of the two pairs of leg portions 30 extend downward from the joint portion 20 and are spaced apart from each other, and the joint portion 20. Protrudes laterally from the seat 10. Accordingly, the upper and lower chairs 1 can be stacked so that the pair of legs 30 of the lower chair 1 are positioned between the pair of legs 30 of the upper chair 1 without interference.

  And the chair 1 has the upper curved surface 21 in each outer peripheral surface of the edge part of the front-back direction X in the joint part 20, and the lower end vicinity of each connected leg part 30 in the grounding surface part 40 1 has a lower curved surface 41 that opens toward the other side of the paired leg portions 30. The upper curved surface 21 and the lower curved surface 41 are each curved in a concave shape obtained by inverting the circumferential surface that is the shape of the outer peripheral surface of the leg 30. Therefore, when stacking up and down, the movement of the upper leg 30 is guided by the upper curved surface 21 of the lower chair 1 and the movement of the lower curved surface 41 of the upper chair 1 is the leg of the lower chair 1. 30. Thereby, it is possible to stack the plurality of chairs 1 straight up without shifting the stacking direction, and the stacked state is stabilized.

  Moreover, since the grounding surface part 40 which grounds the chair 1 is a long plate shape which connects two adjacent leg parts 30, the grounding surface is flat and the grounding area is large. Thereby, the friction with the floor surface can be reduced and the chair 1 can be dragged and moved, and even if the floor surface is a tatami mat, the possibility of damaging the tatami surface is reduced, and the chair 1 is like a bag. It can be easily moved by sliding it.

  In addition, since the lower ends of all the leg portions 30 are connected so as to form a frame with the pair of ground surface portions 40 and the pair of reinforcing bars 50, the chair 1 has high rigidity. Thereby, even if the chair 1 is reduced in weight, a predetermined mechanical strength can be ensured. Further, since this reinforcing bar 50 does not contact the floor surface, it does not increase the frictional resistance with the floor surface, and without impairing the function and effect of the grounding surface portion 40 that allows the chair 1 to slide on the floor surface, The rigidity of the chair 1 is increased.

  When a plurality of chairs 1 are stacked one above the other, the seat portion 10 of the upper chair 1 abuts on the seat portion 10 of the lower chair 1 via the fixing portion 60, and in this state, the leg of the upper chair 1. A slight clearance corresponding to the thickness of the fixing portion 60 is provided between the portion 30 and the leg portion 30 of the lower chair 1, and the upper and lower leg portions 30 are very close to each other. Therefore, the action of the upper curved surface 21 and the lower curved surface 41 relatively guiding the movement of the upper leg 30 with respect to the lower leg 30 can be effectively exhibited during the stacking operation. .

  Further, when the plurality of chairs 1 are stacked one above the other, the gap distance between the lower seat portion 10 and the upper seat portion 10 is the height of the fixed portion 60 and is minimal. Accordingly, like the chair 2 of the other embodiment shown in FIG. 9, the lower seat portion 10 and the upper tier 2 are in a state where the leg portion 30 of the upper tier 2 and the leg portion 30 of the lower tier chair 2 are close to each other. Compared with the case where there is a large gap between the seat portion 10 and the seat portion 10, the overall height of the chairs 1 stacked in multiple stages can be suppressed.

  The chair 2 is different from the chair 1 in the inclination angle of the leg portion 30, and the distance between the intersections of the inner and outer contour lines is significantly larger than the thickness of the seat portion 10. Accordingly, the upper curved surface 21 of the lower chair 2 is along the leg 30 of the lower chair 2, and the lower curved surface (not shown) of the upper chair 2 is along the leg 30 of the lower chair 2. In this state, the fixed portion (not shown) of the upper chair 2 is not in contact with the lower seat surface 10. Other configurations of the chair 2 are the same as those of the chair 1.

  The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements can be made without departing from the scope of the present invention as described below. And design changes are possible.

  For example, in the above, the case where the paired leg portions 30 of the two pairs of leg portions 30 are connected to each other by the long flat plate-shaped grounding surface portion 40 is illustrated. It is not limited to this, Even if it is the structure where the leg parts 30 which belong to a different pair are connected by the long flat plate-shaped grounding surface part 40, the effect similar to the above can be acquired.

DESCRIPTION OF SYMBOLS 1, 2 Chair 10 Seat part 20 Joint part 21 Upper curved surface 30 Leg part 40 Grounding surface part 41 Lower curved surface 50 Reinforcing bar 60 Fixed part X The front-back direction N which is a direction where a pair of leg parts are mutually spaced apart N A pair of legs Line M that extends the inner contour line of each part The line that extends the outer contour line of each of the pair of legs

Claims (3)

A seat,
A pair of joints projecting laterally opposite from the seat,
A pair is attached to each joint part, each extends downward, and two pairs of long leg-shaped leg parts that are separated from each other toward the bottom,
A long flat plate shape connecting two of the two adjacent leg portions at the lower end of the two pairs of leg portions, and a flat plate shape provided at the lower end together with the leg portions,
It has
The joint portion is curved in a concave shape obtained by inverting the shape of the outer peripheral surface of the leg portion on the outer peripheral surface of each end portion in the front-rear direction, which is a direction in which the pair of leg portions are separated from each other. Has a surface,
The grounding surface portion has a lower curved surface that is curved in a concave shape obtained by inverting the shape of the outer peripheral surface of the leg portion in the vicinity of the lower end of each leg portion, and that is open inward in the front-rear direction. A chair characterized by that. The grounding surface part is a pair of long flat plates connecting two of the adjacent leg parts at the lower end,
The chair according to claim 1, further comprising a pair of reinforcing bars that connect the legs that are not connected to each other at the ground surface portion at a position higher than the ground surface portion. The joint portion is fixed to the seat portion via a fixing portion that is in contact with the bottom surface of the seat portion,
In a side view in which the direction in which the pair of legs are separated from each other is the left-right direction, a point where lines extending from the inner contour lines of the pair of legs intersect and outer contour lines of the pair of legs The angle of inclination of the leg portion is set so that the distance between the points where the lines extending from the crossing point are substantially the same as the thickness of the seat portion. The chair described in.

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