JP2008113937A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To configure a back such that a back tilting operation is possible and to operate the back and a seat in relation by an extremely simple configuration without providing a special energizing mechanism in the chairs of various forms. <P>SOLUTION: In the chair C including a chair body 1, a pair of left and right backrest support frames 2 and 2 provided at the upper part of the chair body 1, a backrest 3 composed by making the backrest support frames 2 and 2 support both left and right sides so as to be tilted back, and a seat 4 composed by vertically movably hanging the rear end part from the backrest 3, the backrest support frames 2 and 2 are configured so as to be elastically deformed when receiving the load of a sitting person. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a chair capable of tilting a backrest backward.

In recent years, chairs have been proposed that can perform so-called horizontal stacking in which chairs are brought close to each other in the front-rear direction for storage. As this type of chair, a chair that employs a configuration in which the seat is superposed in a state where the seat is moved to a standing position substantially perpendicular to the floor surface is widely known (see, for example, Patent Document 1).
JP 2006-158745 A

  By the way, in the chair of the structure described in Patent Document 1, the backrest is formed integrally with the chair main body, and the seat is pivotally supported by a frame shaft formed at the boundary between the chair main body and the backrest. Thus, even in such a chair, there is a demand to configure the back so that it can be tilted backward and to operate the back seat in association with each other. However, in the configuration described in Patent Document 1, the back and the seat are individually supported by the chair body, and the rotation center of the seat and the lower end of the backrest are at the same height position. However, it is difficult to make the seat operable in relation to the backward tilting motion of the backrest. On the other hand, in a well-known office swivel chair that is configured to allow the back to be tilted backward and to operate with the back seat associated with the backrest, the backrest is a single back support rod. In such a configuration, it is necessary to give a certain degree of rigidity to the back support rod in order to support the backrest, and to resist the back tilting action of the backrest. In order to apply a reaction force to the backrest, it is necessary to separately provide an urging mechanism and connect it to the backrest. In other words, the chair that can be operated with the back seat related in this way and can apply a reaction force to the backrest against the back tilting motion of the backrest has a slightly complicated configuration.

  The present invention is configured to solve the problems described above.

  That is, the chair according to the present invention includes a chair body, a pair of left and right backrest support frames provided above the chair body, and a backrest that is supported by the backrest support frame so that the left and right sides can be tilted backward. The backrest is provided with a seat in which the rear end portion is suspended so as to move up and down, and the backrest support frame is elastically deformable under the load of the seated person. And

  In such a case, the left and right sides of the backrest are supported by the backrest support frame so as to be able to tilt backward, and the backrest support frame is elastically deformable under the load of the seated person. When the backrest is tilted backward by the load, the elastic force of the backrest support frame can be used as a reaction force. In addition, the back end of the seat is suspended so as to be movable up and down on the backrest, so that the back seat can be moved integrally during the back tilting operation, and the left and right back Since the right and left sides of the backrest are supported by the backrest support frame, the backrest support frame can be made thinner than in a mode in which the backrest is supported by one back support rod. Therefore, such a chair can be realized with a very simple configuration without providing a special urging mechanism.

  As a mode for making it possible to cope with a wide range of usage modes, a backrest that can be inserted into and removed from the backrest support frame can be cited. If this is the case, the backrest having various shapes can be attached to the backrest support frame, for example, the backrest having a headrest or the backrest having no headrest can be selectively attached. Because it can.

  As an example of the configuration of the backrest support frame for suitably obtaining such an effect with a simple configuration, the backrest support frame includes an upright portion that stands up from the chair body, and a rear portion from the tip of the upright portion. There is an elbow rest provided in an extended manner, and a backrest is attached to the elbow rest. In such a case, the backrest support frame is subjected to a load from the backrest, and the backrest support frame is elastically deformed with the base end of the backrest support frame, that is, the joint portion with the chair body as a fulcrum. Because it can.

  In addition, as described above, the chair is a chair that is suspended from the back so that the rear end of the seat can be moved up and down, and the chair body has a pair of left and right rear legs extending forward and upward from the floor surface; A side frame extending forward from the upper end of the rear leg; and a front leg connected to the front end of the side frame; and the back support frame is erected from the rear leg or the side frame on both the left and right sides. If it is made, it can implement | achieve the structure which moves a back seat integrally in the case of back tilting operation | movement in a chair of four legs.

  In a four-legged chair as described in the previous section, the configuration in which the back seat is moved integrally during the back tilting operation is realized with a small number of parts, and further, the aspect of ensuring the rigidity of such a chair , And the chair body and the back support frame are integrally formed.

  As a configuration for further improving the sitting comfort of such a chair, the placement part set at the front end of the seat can be placed on the chair body, and the part behind the placement part of the seat and the chair The thing which provided the clearance gap between the main bodies is mentioned. In such a case, there is a gap below the rear part of the seat, so that the range of vertical movement of the seat interlocking with the backward inclination of the backrest can be increased.

  As a mode for more stably supporting the seat of such a chair on the chair body, the side frame of the chair body has an inclination from the rear lower side to the front upper side, and the seat is positioned at the front end of the side frame. There is one that is placed on a horizontal member that is installed horizontally.

  In particular, if the seat is configured to be movable in the front-rear direction with the seat mounted on the horizontal member, the rear end of the seat is lowered while interlocking with the back tilting action of the backrest. The aspect which slides a seat back can be implement | achieved, and the seating comfort of such a chair can further be improved.

  As an example of a configuration for suspending the seat from the backrest, the seat is erected from the seat body having a seat surface and the left and right corners of the rear end of the seat body, and the tip is backrested. And a pair of left and right joints pivotally attached to the lower end of the.

  According to the chair of the present invention, the backrest is supported by the backrest support frame so that the backrest can be tilted backward, and the backrest support frame can be elastically deformed by receiving the load of the seated person. Therefore, when the backrest is tilted backward, the elastic restoring force of the backrest support frame can be used as a reaction force. In addition, the back end of the seat is suspended so as to be movable up and down on the backrest, so that the back seat can be moved integrally during the back tilting operation, and the left and right back Since the right and left sides of the backrest are supported by the backrest support frame, the backrest support frame can be made thinner than in a mode in which the backrest is supported by one back support rod. Therefore, it is possible to realize a chair capable of integrally moving the back seat during the backward tilting operation with a very simple configuration without providing a special urging mechanism.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 5, the chair C according to the present embodiment includes a chair body 1, a pair of left and right back support frames 2 provided above the chair body, and the back support frame 2. A backrest 3 that is supported and a back end 3 that is suspended by a backrest mechanism J via a seat suspension mechanism J and that is substantially horizontal with respect to the use position U and the floor surface. And a seat 4 that is rotatable between the vertical standing position S. And in the state which has arrange | positioned the said seat 4 to the standing position S, as shown in FIG. 6, it is comprised so that the chair C of the same structure can be stacked in the front-back direction. 1 is an overall perspective view of a state in which the seat 4 of the chair C is disposed at the use position U, and FIG. 2 is an overall perspective view of a state in which the seat 4 of the chair C is disposed in the standing position S. FIG. 3 is a side view of the chair C, FIG. 4 is an exploded perspective view of the chair C, and FIG. 5 is a view of the chair body 1 and the backrest support frame 2 as viewed from obliquely upward. Each figure is shown.

  Specifically, the chair body 1 includes a pair of left and right rear legs 11, 11 and a pair of left and right side frames 12 extending forward from the rear legs 11, as mainly shown in FIGS. 2 and 5. , 12 and the rear horizontal member 13 provided horizontally between the left and right side frames 12 and 12 in the depth direction and the front provided horizontally between the front end portions of the left and right side frames 12 and 12. It has a horizontal member 14 and front legs 15, 15 connected to the front ends of the side frames 12, 12. Further, casters 16 are provided at the lower ends of the rear legs 11 and 11 and the front legs 15 and 15, respectively.

  More specifically, the rear leg 11 rises forward and upward from the floor surface, and mainly supports the load received by the backrest 3.

  As described above, the side frame 12 extends forward from the upper end of the rear leg 11 and has an inclination upward toward the front end. Further, the distance between the left and right side frames 12, 12, that is, the width dimension of the chair body 1, is defined by the rear legs 11, 11, the side frames 12, 12, and the front legs 15, 15 as shown in FIG. The side frames 12 and 12 and the front legs 15 of the other chairs 2 are arranged in the space SP to be horizontally stacked so that they are gradually reduced from the rear toward the front.

  As described above, the rear horizontal member 13 is provided horizontally between the left and right side frames 12 and 12 in the middle in the depth direction. During stacking, the rear horizontal member 13 and the side frame 12 As a contact portion T formed by contacting a portion straddling both side edges of the rear portion 13a of the horizontal member 13 and the side frame 12 with the front leg 15 of the chair C located rearward. Yes. The contact portion T is covered with a cover member 131.

  As described above, the front horizontal member 14 is provided horizontally between the front end portions of the left and right side frames 12, 12. When the seat 4 is disposed at the use position U, the front horizontal member 14 is provided. The frame 14 and the front end portions of the side frames 12 and 12 receive the load of the front portion of the seat 4.

  The front leg 15 hangs down from the upper end of the side frame 12 as described above, and at the time of stacking, the upper part of the front leg 15 is brought into contact with the abutment portion T of the rear horizontal member 13 so as to be between the chairs. Positioning is performed. The side frame 12 is inclined upward toward the front end, and the rear horizontal member is provided horizontally between the trunks in the depth direction of the side frame. The rear portion 13 a of the rear horizontal member 13 is positioned below the upper end 15 a of the front leg 15. Further, the upper end 15a of the front leg 15 and the vicinity thereof are covered with a cover member 151, and the cover member 151 preferentially contacts the rear portion 13a of the rear horizontal member 13. Further, the front leg 15 and the side frame 12 are integrally formed using a front frame member F1 formed using the same metal pipe in this embodiment. That is, in the front frame member F1, a portion standing from the floor functions as the front leg 15, and a portion extending from the joint portion with the rear frame portion to the upper end 15a of the front leg 15 functions as the side frame 12.

  In the present embodiment, the backrest support frame 2 is integrally formed using a rear frame member F2 which is the same metal pipe as the rear leg 11, as mainly shown in FIGS. . That is, among the rear frame member F2, the rear leg 11 is below the joint portion with the side frame 12, and the elastic frame portion 3 is above. The backrest support frame 2 extends from the upper end of the rear leg 11 and extends upright in the same direction as the rear leg 11, and extends backward from the upper end of the upright part as an armrest. It has the elbow rest part 22 which has the function of. The backrest 3 can be inserted into and removed from the elbow rest 22. Further, as shown in FIG. 7, the backrest support frame 2 can be elastically deformed by receiving a load acting on the elbow rest 22 from the backrest 3. Note that the solid line in FIG. 7 shows a side view in a state where the chair C receives a load, and the imaginary line in the figure shows a side view in a state in which the chair C does not receive a load.

  As shown in FIGS. 1, 3, and 4, the backrest 3 includes a backrest body 31 having a backrest surface 3 a and mounting portions 32 that extend from left and right side edges of the backrest body 31. And have. The backrest 3 is supported by the backrest support frame 2 via the backrest holding mechanism H so as to be detachable and detachable. Specifically, the backrest holding mechanism H is configured such that the mounting portion 32 is detachably supported by the backrest support frame 2 (elbow pad portion 22). In the present embodiment, the mounting portion 32 has a cylindrical shape into which the elbow rest 22 can be inserted. In the present embodiment, the backrest surface 3a faces forward and upward, and when the load applied to the backrest surface 3a is applied to the backrest support frame 2, as shown in FIG. The backrest 3 is inclined backwards following the elastic deformation of the support frame 2.

  As described above, the seat 4 has the back end 3 suspended from the backrest 3 via the seat suspension mechanism J, and is located substantially horizontally with respect to the floor and the use position U and the floor. It is possible to rotate between a substantially vertical standing position S. More specifically, the seat 4 includes a seat body 41 having a seat surface 4a and a pair of left and right joint portions 42 provided upright from both side edges of the rear end portion of the seat body. The seat body 41 further includes a cushion 411 and a shell 412 provided below the cushion 411. When the seat body 41 is disposed at the use position U, the position of the rear end portion in the front-rear direction is the backrest 3 Near the surface. On the other hand, the joint portion 42 has a base end portion connected to the shell 412, and a distal end portion pivotally attached to the lower end of the backrest 3 so as to be rotatable around an axial center extending in the horizontal direction. Specifically, the tip end portion of the joint portion 42 is pivotally attached to seat pivot attachment portions 31x provided on both side ends of the lower end of the backrest main body 31. That is, a seat suspension mechanism J is formed by the seat pivot attachment portion 31x and the joint portion 42. Further, the joint 42 has a shape that bulges backward when placed in the use position U, that is, bulges downward in the standing position S, in order to prevent interference with the lower end of the backrest 3 in the standing position S. Have a shape to In the state where the seat 4 is arranged at the use position U, a gap SP <b> 2 is provided between the rear portion of the seat and the side frame 12.

  When a seated person sits on this chair C, a load is first applied to the seat 4. Then, a part of the load applied to the seat 4 is transmitted to the backrest 3 through the seat suspension mechanism J, and the mounting portion 32 of the backrest 3 and the elbow rest portion 22 of the backrest support frame 2 Is transmitted to the back support frame 2 through the joint portion. Then, as shown in FIG. 7, the backrest support frame 2 is elastically deformed to absorb the impact when seated. The elbow rest 22 moves rearward and downward due to the elastic deformation of the back support frame 2. Along with this, the backrest 3 follows the elbow rest 22 and moves rearward and downward as a whole, while the backrest 3 performs a backward tilting operation. The seat 4 is suspended from the backrest 3 via the seat suspension mechanism J as described above, and a gap SP2 exists between the rear end portion and the chair body 1 (side frame 12). Therefore, the rear end portion of the seat 4 descends following the backward tilting motion of the backrest 3. In addition, since the front end portion of the seat 4 is slidable with respect to the chair body 1, the seat 4 also performs a backward sliding operation simultaneously with the above-described lowering operation of the rear end portion.

  On the other hand, when the chair C is stored, first, the seat 4 is moved to the standing position S as described above, and then approached to another chair C having the same structure from the rear. Then, as shown in FIG. 6 and FIG. 8 which is a cross-sectional side view of the central portion of the main part, on the abutting portion T of the chair C on the approaching side, that is, the chair C located on the front side, The front legs 15 of the chairs that are positioned are brought into contact with each other, and positioning between the chairs C and C adjacent to each other is performed. And the above operation is repeated and stacking storage of the chair C is performed. At that time, since the abutting portion T is located below the upper end 15a of the front leg 15, the front leg of the chair C located on the rear side is uneven due to the presence of unevenness in the floor surface of the area where the chair C is stored. 15 is located below the upper end 15a of the front leg 15 of the chair C located on the front side, the difference in height position between these is the upper end 15a of the front leg 15 and the rear horizontal member. The front leg 15 can be brought into contact with the contact portion T if it is smaller than the difference in height position with respect to the lower end of 13.

  According to the configuration of the chair C according to the present embodiment, as described above, the left and right sides of the backrest 3 are supported by the backrest support frame 2 so as to be tilted backward, and the backrest support frame 2 is seated. Therefore, when the backrest 3 is tilted backward by the seated person's load, the elastic force of the backrest support frame 2 can be used as a reaction force, and the elastic deformation can be used when sitting. Can absorb shocks. In addition, since the rear end portion of the seat 4 is suspended to the backrest 3 so as to be movable up and down, the backrest 4 and the seat 3 are moved together during the backward tilting operation of the backrest 4. In addition, since the left and right back support frames 2 are supported on both the left and right sides of the backrest 3, the backrest support frame 2 can be compared with a mode in which the backrest is supported by one back support rod. Can be made thin.

  Further, since the backrest 3 can be inserted into and removed from the backrest support frame 2, the backrest 3 having various shapes with respect to the chair body 1 and the backrest support frame 2, for example, a headrest (not shown). A backrest 3 or the like having a can be mounted and can be used in a wide range of usage modes.

  Furthermore, the backrest support frame 2 has a standing part 21 that stands up from the chair body 1 and an elbow rest part 22 that extends backward from the tip of the standing part 21. Since the backrest 3 is attached to the armrest, the load from the backrest 3 is applied to the elbow rest 22 and the base end of the backrest support frame 2, that is, the joint portion with the chair body 1, is used as a fulcrum. Such an effect can be suitably obtained with a simple configuration by elastically deforming the back support frame 2.

  In addition, the chair body 1 has a pair of left and right rear legs 11, 11 extending forward and upward from the floor surface, and side frames 12, 12 extending forward from the upper ends of the rear legs 11, 11. And the front legs 15 connected to the front ends of the side frames 12 and 12, and the back support frames 2 and 2 are raised from the rear legs 11 and 11 on both the left and right sides. Even in such a chair having a backrest, it is possible to realize a configuration in which the backrest 3 and the seat 4 are integrally moved when the backrest 3 is tilted backward.

  In particular, in the present embodiment, the back leg 11 of the chair body 1 and the backrest support frame 2 are integrally formed as a rear frame member F2, so that the backrest 3 is tilted when the backrest 3 is tilted backward. The structure in which the seat 4 and the seat 4 are integrally moved can be realized with a small number of parts, and the rigidity of the chair C can be secured.

  Furthermore, since the front end portion of the seat 4 can be placed on the chair body 1 and a gap is provided between the seat body 4 and the rear portion of the seat 4 and the chair body 1, The range of the vertical movement of the seat 4 interlocked with the rearward tilt can be increased, and the sitting comfort of the chair C can be further improved.

  Further, the side frame 12 of the chair main body 1 has a slope extending from the rear lower side to the front upper side, and the seat 4 is horizontally mounted between the front end portions of the left and right side frames 12, 12. Since it is made to mount on the material 14, the seat 4 can be supported to the chair main body 2 more stably.

  In addition, since the seat 4 can be moved in the front-rear direction while the seat 4 is placed on the front horizontal member 14, the rear end portion of the seat 4 is lowered in conjunction with the backward tilting operation of the backrest 3. While the seat 4 can be slid rearward, the sitting comfort of the chair C can be further improved.

  The seat 4 has a seat body 41 having a seating surface 4a, and a pair of left and right seats that are erected from the left and right corners of the rear end of the seat body 41 and whose tip is pivotally attached to the lower end of the backrest 4. Therefore, the angle between the backrest surface 3a and the seating surface 4a can be changed during the backward tilting motion of the backrest 3, and the seat 4 is in the use position U and the storage position. The chair C can be horizontally stacked because it can move between the chairs S.

  The present invention is not limited to the embodiment described above.

  For example, the seat is not necessarily movable in the front-rear direction.

  Further, the seat does not need to be supported by the front horizontal member of the chair body, and the left and right side edges may be supported by the side frames. Further, the portion where the seat is placed on the chair main body may be the front portion of the seat and the portion closer to the center in the depth direction, not the vicinity of the front end of the seat.

  Further, the support mode for the backrest of the seat is not limited to the mode in which only the joints provided at the left and right ends of the seat are pivotally attached to the backrest as in the above-described embodiment, but the width direction between the backrest and the seat You may make it provide the pivot axis | shaft covering substantially the whole region.

  On the other hand, the backrest support frame does not necessarily have to be integrated with the rear leg, and may be fixed to the side frame of the chair body by a method such as welding.

  In addition, the chair body is not limited to a mode having a pair of left and right front legs and rear legs as in the above-described embodiment, for example, a leg standing from the floor and having leg blades and leg posts and above the legs. You may employ | adopt the structure of the chair main body which has the base material provided.

  And the backrest support frame does not need to have an elbow rest, and may support the left and right side edges above the intermediate part in the height direction of the backrest from the outside. In this case, the lower end of the backrest may be separated from the backrest support frame, and a seat may be separately suspended from the lower end of the backrest.

  In addition, various modifications can be made without departing from the spirit of the present invention.

The whole perspective view of the state which has arranged the seat of the chair concerning one embodiment of the present invention in the use position. The whole perspective view of the state which arranged the seat of the chair concerning the embodiment in the standing position. The side view of the chair which concerns on the same embodiment. The disassembled perspective view of the chair which concerns on the same embodiment. The figure which shows the state which looked at the chair main body and backrest support frame which concern on the same embodiment from front diagonally upward. The side view which shows the aspect which makes the chair which concerns on the embodiment stack horizontally. The figure which shows the operation | movement of the backrest support frame, backrest, and seat of the chair which concerns on the embodiment. The center side sectional view of the important section of the chair concerning the embodiment.

Explanation of symbols

C ... Chair 1 ... Chair body 2 ... Backrest support frame 3 ... Backrest 4 ... Seat

Claims (9)

A chair body, a pair of left and right backrest support frames provided above the chair body, a backrest that is supported by the backrest support frame so that the left and right sides can be tilted backward, and a rear end portion on the backrest The chair is characterized in that the backrest supporting frame is elastically deformable under the load of the seated person. 2. The chair according to claim 1, wherein the backrest can be inserted into and removed from the backrest support frame. The backrest support frame has an upright portion that stands up from the chair body, and an elbow rest that extends backward from the tip of the upright portion, and the backrest is attached to the elbow rest. The chair according to claim 1, wherein the chair is provided. The chair body includes a pair of left and right rear legs extending forward and upward from the floor, a side frame formed by extending forward from an upper end of the rear leg, and a front leg connected to the front end of the side frame. The chair according to claim 1, 2, or 3. The chair according to claim 4, wherein a rear leg of the chair body and the back support frame are integrally formed. The mounting part set in the vicinity of the front end of the seat can be placed on the chair body, and a gap is provided between a part of the seat behind the mounting part and the chair body. Item 1. The chair according to 1, 2, 3, 4 or 5. The side frame of the chair body has an inclination from the rear lower side to the front upper side, and the seat is placed on a horizontal member provided horizontally between the front end portions of the side frame. The chair according to claim 6. The chair according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the seat is supported by the chair body so as to be movable in the front-rear direction. The seat includes a seat main body having a seating surface, and a pair of left and right joints that are erected from the left and right corners of the rear end of the seat main body and that are pivotally attached to the lower end of the backrest. The chair according to claim 1, 2, 3, 4, 5, 6, 7 or 8.

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