JP6381103B2 - Chair - Google Patents

Description

The present invention relates to a chair provided with an armrest member for a chair.

As a chair used for office work or the like, there is a chair to which an armrest member for placing an arm tip from an elbow of a seated person is attached (for example, see Patent Documents 1 to 3).
The armrest member for a chair employed in the chairs described in Patent Documents 1 to 3 includes a load receiving portion having an elbow rest surface extending in the front-rear direction on the upper surface, and along the back surface of the seat body from below the load receiving portion. And a connecting portion that connects the load receiving portion and the chair attaching portion, and the load receiving portion and the connecting portion are formed in a plate shape in cross section, and the whole is formed in a closed loop shape. This chair armrest member is formed in a plate shape with a constant width from the load receiving portion to the connecting portion, so it is lightweight but strong against loads from above, and it is on the elbow rest surface when the seated person stands up. There is an advantage that it is easy to put weight on the arm.

Japanese Utility Model Publication No. 05-018354 Japanese Patent No. 3156116 Japanese Patent No. 3714591

  However, in the conventional armrest member for a chair, since the region extending from the load receiving portion to the connecting portion is formed with a constant width, there is an advantage that the load from above can be transmitted to the chair mounting portion with high rigidity, The inner surface of the front edge portion of the connecting portion is close to the lower limb of the seated person seated on the seat, and the possibility of pressing the side space of the lower leg of the seated person increases.

Therefore, the present invention is intended to provide a chair that can transmit the load input to the load receiving portion to the chair mounting portion with high rigidity without pressing the side space of the lower limb of the seated person.

The chair according to the present invention employs the following configuration in order to solve the above problems .
That is, the chair according to the present invention includes a chair body having a seat body, and an armrest member for a chair attached to the chair body, and the armrest member for the chair extends in one direction on the upper surface. A load receiving portion, a chair mounting portion extending in the width direction substantially orthogonal to the extending direction of the elbow rest surface below the load receiving portion, and the chair mounting extending downward from the load receiving portion. a connecting portion connected to parts, a chair and a, the connecting portion, the extending direction of the near one end region of the elbow placing surface of the load receiving portion, the load on the width direction Narrower than the load receiving part in the width direction from the reinforcing wall part extending substantially downward with the same width as the receiving part and a region closer to the other end in the extending direction of the elbow rest surface of the load receiving part. It has a narrow wall portion extending downwardly in width, and the said narrow wall reinforcing wall portion Are connected to each other at least in the vicinity of the chair mounting portion, and the connected portion is provided with a curved surface recessed in a concave shape in a direction opposite to the extending direction of the chair mounting portion. In a state where the chair mounting portion is mounted on the back side of the seat body of the chair body with the mounting surface facing upward, the lower edge of the narrow wall portion has a portion that is continuous with the curved surface, the seat body of the chair body The lower edge of the reinforcing wall portion is arranged so that the portion continuing to the curved surface wraps the side surface of the chair body closer to the rear portion and the rear surface closer to the side portion. and said that you are.
With this configuration, the load input to the load receiving portion is transmitted to the chair mounting portion through the reinforcing wall portion and the narrow wall portion. At this time, since the reinforcing wall portion extends downward at substantially the same width as the load receiving portion, the load input to the load receiving portion can be transmitted to the chair mounting portion with high rigidity. On the other hand, since the narrow wall portion extends downward with a narrower width than the load receiving portion, when the chair mounting portion is attached to the chair body, the side of the lower limb of the seated person seated on the seat body No more pressure on the space.
Moreover, when the armrest member for chairs is attached to a chair main body, the curved surface recessed in the concave shape of the armrest member for chairs will oppose the side surface of a chair main body. Thereby, it becomes possible to extend the position of the side part of a seating body toward the curved surface of the armrest member for chairs. Therefore, the side space of the lower limb of the seated person is further expanded by the curved surface provided at the portion where the narrow wall portion and the reinforcing wall portion are connected, and the seat body of the chair body can be further expanded.
Further, the lower edge of the narrow wall portion facing the side portion of the seat body is narrower than the reinforcing wall portion, and the lower edge of the reinforcing wall portion is a side surface closer to the rear portion of the seat body and a rear surface closer to the side portion. The side position and the rear position of the seat body can be further extended.

It is desirable that the edge of the narrow wall portion on the side away from the reinforcing wall portion is inclined toward the side close to the reinforcing wall portion from the load receiving portion toward the chair mounting portion.
In this case, when the chair attachment portion is attached to the chair body, a recess having a substantially V-shaped side view is formed between the edge of the narrow wall portion and the seat surface of the chair body, and the seat is seated by the recess. The side space of the person's lower limbs will be further expanded.

The load receiving portion, the narrow wall portion, and the reinforcing wall portion may have a plate-like cross section continuously formed in a closed loop shape.
In this case, it is possible to transmit the load input to the load receiving portion to the chair mounting portion with high rigidity without pressing the side space of the lower limbs of the seated person even though the structure is lightweight.

The narrow wall portion and the reinforcing wall portion are formed by being twisted so as to change the direction of the wide surface toward the chair mounting portion, and the mutual wide surfaces at positions close to the chair mounting portion. It is desirable to be connected in a continuous manner.
In this case, it is possible to transmit the load input to the load receiving portion to the chair mounting portion with high rigidity without squeezing the lateral space of the lower limbs of the seated person, even though it is a continuous structure with little waste. Become. Therefore, the yield of products can be increased and further weight reduction can be achieved.

  According to this invention, the connecting portion has the reinforcing wall portion extending from the region closer to one end in the extending direction of the elbow rest surface, and the narrow wall portion extending from the region closer to the other end, and the reinforcing wall Since the part is formed to be approximately the same width as the load receiving part and the narrow wall part is formed to be narrower than the load receiving part, the side of the lower limb of the seated person is not compressed and the load receiving part is The input load can be transmitted to the chair mounting portion with high rigidity.

It is a left view of the chair of one Embodiment of this invention. It is a top view of the chair of one Embodiment of this invention. It is a front view of the chair of one Embodiment of this invention. It is sectional drawing corresponding to the IV-IV cross section of FIG. 1 of one Embodiment of this invention. It is sectional drawing corresponding to the VV cross section of FIG. 1 of one Embodiment of this invention. It is sectional drawing corresponding to the VI-VI cross section of FIG. 1 of one Embodiment of this invention. It is a perspective view of an armrest member of one embodiment of this invention. It is a front view of an armrest member of one embodiment of this invention. It is a top view of the armrest member of one Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the direction indicated by the arrow FR in the figure facing the front of the person seated in the chair in a regular posture is referred to as “front”, and the opposite direction is referred to as “rear”. For “upper”, “lower”, “left”, and “right”, the direction indicated by the arrow UP in the figure above the person sitting on the chair in a regular posture is “up” and the opposite direction is “ The direction indicated by the arrow LH on the left side of the person sitting in the normal posture on the chair 1 is called “left”, and the direction opposite to that is called “right”.

FIG. 1 is a side view showing the overall configuration of the chair 1 of this embodiment, FIG. 2 is a top view of the chair 1, and FIG. 3 is a front view of the left half of the chair 1.
As shown in these drawings, a chair 1 according to this embodiment includes a leg 2 placed on a floor F, a box-shaped support base 3 installed at the upper end of the leg 2, and a seated person. A seat body 4 that is attached to the upper surface of the support base 3 and supports the seat body 4, and supports the back of a seated person that extends from the support base 3 to the rear upper side and is seated on the seat body 4. A backrest 6 and a chair armrest member 7 (hereinafter referred to as “armrest member 7”) attached to the left and right seat receiving members 5 below the seat body 4 are provided.
In this embodiment, the remaining part of the chair 1 excluding the armrest member 7 is referred to as a chair body 12.

  The leg 2 includes a diverged leg 8 with casters 8 a and a pedestal column 9 that stands up from the center of the diverged leg 8 and incorporates a gas spring that is a lifting mechanism. Is mounted so as to be rotatable in the horizontal direction. The support base 3 incorporates an elevation adjustment mechanism for the pedestal 9 and a tilt adjustment mechanism for the backrest 6. The backrest part 6 includes a backrest support frame 10 having a substantially L shape in side view, and a backrest body that directly supports the back of a seated person attached to the front surface of the back support frame 10 and seated on the seat body 4. 11, and the front lower end of the backrest support frame 10 is connected to the tilt adjustment mechanism in the support base 3.

  The seat body 4 includes a base plate 13 constituting a skeleton, a cushion material 40 (see FIGS. 4 to 6) made of urethane or the like attached to the top of the base plate 13, and an outer peripheral edge portion of the base plate 13 from the outer surface of the cushion material 40 And a tension member 14 covering the hook. As shown in FIG. 2, the seat body 4 is formed in a substantially square top view shape with rounded four corners. The left and right armrest members 7 are attached to the seat receiving member 5 in the rear side region from the center in the front-rear direction below the seat body 4.

  4, 5, and 6 are cross-sectional views corresponding to the IV-IV cross section, the VV cross section, and the VI-VI cross section of FIG. 1, respectively, and FIGS. 7, 8, and 9 are illustrated on the left side. It is a figure which shows the armrest member. Hereinafter, the detailed structure of the armrest member 7 will be described. Since the left and right armrest members 7 have the same basic structure although they are symmetrical, the left armrest member 7 will be described below as a representative, The description of the armrest member 7 will be omitted. In the following description, the vertical, front-rear, and left-right orientations of the armrest member 7 mean the vertical, front-rear, left-right orientations when the armrest member 7 is attached to the chair body 12 unless otherwise specified. Shall.

  The armrest member 7 of this embodiment is integrally formed of a hard resin material, and is fastened and fixed to the seat receiving member 5 by bolts 15 on the lower surface side of the seat body 4. The armrest member 7 includes a load receiving portion 16 having an elbow mounting surface 16a extending in the front-rear direction (one direction), and a side below the load receiving portion 16 (a direction substantially orthogonal to the extending direction of the elbow mounting surface 16a). ) And a connecting portion 18 that extends downward from the load receiving portion 16 and is connected to the proximal end of the chair mounting portion 17. The connecting portion 18 includes a rear wall 18A that extends substantially vertically downward from the rear end portion of the load receiving portion 16, and a front wall 18B that extends downward while tilting rearward from the front end portion of the load receiving portion 16. The rear wall 18A and the front wall 18B are connected to each other at their lower ends so as to form a substantially V shape in a side view. The rear wall 18A and the front wall 18B are connected to the base end of the chair mounting portion 17 in the lower connection region 18a at the lower end. The chair mounting portion 17 is formed by a trapezoidal plate-like piece that is substantially along the lower surface of the seat body 4, and a mounting seat 17 a for the seat receiving member 5 is provided on the tip side thereof.

  In the armrest member 7 of this embodiment, the load receiving portion 16 and the front wall 18B and the rear wall 18A that are connected to each other at the lower end are formed in a continuous belt shape having a substantially constant thickness, and the side view as a whole is a closed loop. It is made into a shape. The closed loop shape is a substantially triangular loop shape in which the load receiving portion 16 is substantially horizontal and converges at the lower connection region 18a at the lower ends of the front wall 18B and the rear wall 18A. Further, the front wall 18B and the rear wall 18A have a shape in which the side edge on the side facing the seat body 4 is appropriately twisted outward so as to change the direction of the respective wide surfaces. The front wall 18B and the rear wall 18A have a continuous shape in which the plate thickness directions are substantially aligned in the lower connection region 18a.

  Here, the rear wall 18A of the connecting portion 18 extends downward from the rear end portion of the load receiving portion 16 while maintaining the posture in which the plate thickness direction is substantially in the front-rear direction, and in the vicinity of the lower connecting region 18a at the lower end. The side edge on the side facing the seat body 4 is twisted so that it opens slightly rearward. Therefore, the rear wall 18A has substantially the same width as that of the load receiving portion 16 from the upper end portion to the vicinity of the lower end, and is slightly narrowed by the amount of twist in the lower connection region 18a at the lower end. In this embodiment, the rear wall 18A having substantially the same width as the load receiving portion 16 constitutes a reinforcing wall portion having high rigidity with respect to load input from the upper side or the side.

  On the other hand, the front wall 18B of the connecting portion 18 has the thickness direction substantially in the front-rear direction at the connection position at the front end portion of the load receiving portion 16, but the seat body 4 faces downward from the vicinity of the upper end portion. It is twisted so that the side edge portion facing the side gradually opens forward (so that the thickness direction is substantially in the left-right direction). Therefore, as shown in FIGS. 3 and 8, the front wall 18 </ b> B extends from the vicinity of the upper portion toward the chair mounting portion 17 with a width narrower than that of the load receiving portion 16 when viewed from the front. In the case of this embodiment, the front wall 18B has a plate thickness direction in the left-right direction before reaching the lower connection region 18a, and the width in the left-right direction is greatly narrowed in the lower connection region 18a. In this embodiment, the front wall 18B whose width is narrower than that of the load receiving portion 16 constitutes a narrow wall.

Further, the lower connection region 18a at the lower ends of the front wall 18B and the rear wall 18A is a portion that curves in the direction of the seat body 4 and continues to the chair mounting portion 17, but faces the seat body 4 of the lower connection region 18a. On the side, a curved surface 20 that is recessed in a concave shape is provided on the outer side in the left-right direction (in a direction opposite to the extending direction of the chair mounting portion 17) due to the above-described twisting of the front wall 18B and the rear wall 18A. .
In addition, the substantially horizontal cross section of the lower connecting region 18a is formed in a straight line from the front end portion to the substantially central region in the front-rear direction substantially along the front-rear direction, but on the rear side of the substantially central region in the front-rear direction. Are curved toward the extending direction of the chair mounting portion 17.

  As shown in FIGS. 1 to 6, the armrest member 7 has a lower connecting region between the front wall 18 </ b> B and the rear wall 18 </ b> A in a state where the chair mounting portion 17 is fastened and fixed to the seat receiving member 5 below the seat body 4. 18a is arrange | positioned so that the outer side of the rear surface 4b (rear corner part) near the side surface 4a and the side part of the seat body 4 may be wrapped. Specifically, the lower edge portion of the front wall 18B in the lower connection region 18a is disposed outside the side surface 4a of the seat body 4, and the lower edge portion of the rear wall 18A in the lower connection region 18a is the seat body. 4 is disposed outside the rear surface 4b close to the side portion.

  Since the armrest member 7 according to this embodiment is configured as described above, when a seated person sitting on the seat body 4 stands up, when the arm is placed on the elbow rest surface 16a and the weight is applied, The load input to the receiving portion 16 can be rigidly transmitted to the chair mounting portion 17 through the front wall 18B and the rear wall 18A. In particular, in the case of the armrest member 7, although the width of the front wall 18 </ b> B is narrower than that of the load receiving portion 16, the rear wall 18 </ b> A extends to the chair mounting portion 17 with substantially the same width as the load receiving portion 16. Therefore, the load input to the load receiving portion 16 can be transmitted to the chair mounting portion 17 with high rigidity. Therefore, in the chair 1 to which the armrest member 7 is attached, the load on the seated person applied to the elbow rest surface 16a can be stably supported by the chair body 12.

Further, in the armrest member 7, the front wall 18 </ b> B extends toward the chair mounting portion 17 with a narrower width than the load receiving portion 16, so that the chair mounting portion 17 is attached to the chair body 12. 2 and 3, the lateral space outside the lower limb L of the seated person seated on the seat body 4 can be enlarged.
Therefore, in the armrest member 7 according to this embodiment and the chair 1 adopting the armrest member 7, the load input to the load receiving portion 16 can be applied without pressing the lateral space outside the lower limb L of the seated person. It can be transmitted to the chair body 12 with high rigidity.

  Further, in the armrest member 7 according to this embodiment, since the front wall 18B is inclined rearward and downward, as shown in FIG. A concave portion that opens in a substantially V shape is formed on the front side in a side view between the portion wall 18B. For this reason, the side space outside the lower limb L of the seated person can be further expanded by the recess formed here.

  Further, in the case of the armrest member 7 according to this embodiment, the curved surface 20 that is recessed in the outer side in the left-right direction is formed on the portion facing the seat body 4 of the lower connection region 18a at the lower end of the front wall 18B and the rear wall 18A. Therefore, the side space of the lower limb L of the seated person seated on the seat body 4 can be further expanded in the left-right direction by the curved surface 20, and the seat body 4 of the chair body 12 can be moved by the armrest member 7. The image can be enlarged in the left-right direction without being restricted. That is, when the armrest member 7 is attached to the chair body 12, the concave curved surface 20 of the armrest member 7 faces the side surface of the chair body 12. 7 can be extended toward the curved surface 20. Therefore, by employing this armrest member 7, the sitting comfort of the chair 1 can be further enhanced.

  Further, in the armrest member 7 of this embodiment, the connecting portion 18 is formed by the front wall 18B and the rear wall 18A, and the load receiving portion 16, the front wall 18B, and the rear wall 18A have a plate-like cross section in a closed loop shape. Since it is made into a continuous shape, the load receiving portion 16 can be connected to the load receiving portion 16 without squeezing the side space of the lower limb L of the seated person while having a lightweight structure having a space portion between the front wall 18B and the rear wall 18A. The input load can be transmitted to the chair mounting portion 17 with high rigidity.

Further, in the case of this embodiment, the front wall 18B and the rear wall 18A of the armrest member 7 are twisted so as to change the direction of the wide surface toward the chair mounting portion 17, and the chair mounting portion 17 is formed. Since the wide surfaces are connected so as to be continuous at positions close to each other, the load receiving portion 16 does not compress the side space of the lower limb L of the seated person, while having a continuous structure with little waste. Can be transmitted to the chair mounting portion 17 with high rigidity.
Therefore, in the armrest member 7 of this embodiment, the product yield can be increased and further weight reduction can be achieved.

  Further, in the chair 1 that employs the armrest member 7 according to this embodiment, the front side (lower edge of the front wall 18B) of the lower connecting region 18a in the front-rear direction is the side surface of the seat body 4 of the chair body 12. 4a, and the armrest member 7 is attached to the chair body 12 so that the rear side (lower edge of the rear wall 18A) of the lower connection region 18a wraps the rear surface 4b near the side of the seat body 4 of the chair body 12. Therefore, the seat 4 can be enlarged laterally and rearward without being restricted by the armrest member 7. That is, in the case of the chair 1 of this embodiment that employs the armrest member 7, the lower edge of the front wall 18B that faces the side of the seat body 4 is narrower than the rear wall 18A, and the rear wall 18A Since the lower edge is disposed so as to wrap around the rear surface of the seat body 4, the side position and the rear position of the seat body 4 can be further extended.

In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary. For example, in the above-described embodiment, the load receiving portion, the front wall, and the rear wall are formed in a closed loop shape, but the reinforcing wall having a width substantially the same as that of the load receiving portion from a region near one end in the longitudinal direction of the load receiving portion. The connection part has no opening in the side view (closed loop shape) when the structure is such that the narrow wall part narrower than the load receiving part extends from the region near the other end in the longitudinal direction of the load wall part. It may be a structure.
In the above embodiment, the wide surfaces of the front wall and the rear wall are twisted. However, the front wall and the rear wall do not necessarily have a twisted structure, and the thickness direction is the upper end. A narrow part may be formed on the front wall while maintaining the constant from the bottom to the bottom.

Further, the armrest member may have the following structures (a) and (b).
(A) a load receiving portion, a rear wall portion extending vertically downward from a rear end portion of the load receiving portion, a front wall portion extending vertically downward from a front end portion of the load receiving portion shorter than the rear wall; A lower wall extending diagonally downward and rearward from the lower end of the front wall and connected to the lower end of the rear wall, and one or both of the front wall and the rear wall being narrower than the load receiving portion Have
(B) a load receiving portion, a rear wall extending vertically downward from the rear end portion of the load receiving portion, and a front wall extending vertically downward from the front end portion of the load receiving portion to substantially the same length as the rear wall. And a lower wall extending in the front-rear direction and connecting the lower end of the front wall and the lower end of the rear wall, the front wall having a portion narrower than the load receiving portion.

DESCRIPTION OF SYMBOLS 1 Chair 4 Seat 7 Armrest member 12 Chair main body 16 Load receiving part 16a Elbow mounting surface 17 Chair attachment part 18 Connection part 18A Rear wall (reinforcing wall part)
18B Front wall (narrow wall)
20 Curved surface

Claims (4)

A chair body having a seat body, and an armrest member for a chair attached to the chair body,
The chair armrest member is:
A load receiving portion having an elbow rest surface extending in one direction on the upper surface;
A chair mounting portion extending in a width direction substantially orthogonal to the extending direction of the elbow rest surface below the load receiving portion;
A chair and a, and a connecting portion connected to the chair mounting portion extending downwardly from said load receiving,
The connecting portion is
A reinforcement wall portion extending downward from the region near one end in the extending direction of the elbow rest surface of the load receiving portion with substantially the same width as the load receiving portion in the width direction;
A narrow wall portion extending downward from the other end region in the extending direction of the elbow rest surface of the load receiving portion with a width narrower than the load receiving portion in the width direction ;
The narrow wall portion and the reinforcing wall portion are connected to each other at least in the vicinity of the chair mounting portion, and the connected portion is recessed in a direction opposite to the extending direction of the chair mounting portion. Curved surface,
In the state where the chair mounting portion is attached to the back side of the seat body of the chair body with the elbow rest surface facing upward, the lower edge of the narrow wall portion has a portion that is continuous with the curved surface of the chair body. Arranged so as to wrap around the side surface of the seat body, and the lower edge of the reinforcing wall portion is arranged so that the portion continuing to the curved surface wraps the side surface of the chair body closer to the rear portion and the rear surface closer to the side portion The chair is characterized by being . The edge of the narrow wall portion on the side away from the reinforcing wall portion is inclined toward the side close to the reinforcing wall portion from the load receiving portion toward the chair mounting portion. Item 1. The chair according to Item 1. The chair according to claim 2, wherein the load receiving portion, the narrow-width wall portion, and the reinforcing wall portion have a plate-like cross section continuously formed in a closed loop shape. The narrow wall portion and the reinforcing wall portion are formed by being twisted so as to change the direction of the wide surface toward the chair mounting portion, and the mutual wide surfaces at positions close to the chair mounting portion. The chair according to claim 3, wherein the chair is connected continuously.

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