JP5292597B2 - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a stacking pitch while securing the strength of a seat and manufacture easiness in a stackable chair. <P>SOLUTION: In the stackable chair C including a frame 1 having a pair of right and left front legs 11, a front frame element 14 connecting the right and left front legs 11, a pair of right and left front rear legs 12 and a rear frame element 16 connecting the right and left front rear legs 12, a seat 2 supported by the rear frame element 16 and front frame element 14 of the frame 1, and a backrest 3 supported by the frame 1, a first tongue piece 161 which projects forward from the rear frame element 16 and a slit 2a1 which is opened on the rear end surface 2a of the seat 2, formed within the thickness dimension of the seat 2 and capable of being engaged with the first tongue piece 161 are engaged, and the seat 2 is supported by the rear frame element 16. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a stackable chair suitably used in a conference hall or the like.

Conventionally, as a chair used in a conference hall or the like, in order to save storage space when not in use, a frame having a front leg and a rear leg is supported by the seat and the backrest, and the distance between the left and right rear legs is set between the left and right rear legs. The chair of the structure which can be stored in the state shorter than this distance and made to stack is widely known (for example, refer patent document 1).
Japanese Patent Application No. 9-215546

  By the way, in the structure of patent document 1, the seat frame side part is extended back from the upper end of the front leg of a flame | frame, and a seat is supported from the downward direction by this seat frame side part. However, when stacking such a chair, the stacking pitch of the chair is determined by the sum of the seat side frame part and the seat thickness dimension when the seat frame side part has a large thickness dimension. If the thickness dimension of the part is increased, the storage efficiency of such a chair is lowered. Therefore, by arranging a seat within the thickness dimension of the rear frame element that connects the left and right rear legs, hitting the rear end of the seat against the rear frame element, and adopting a configuration that connects them, this is adopted. It is conceivable to improve the storage efficiency by suppressing the thickness dimension of such a chair. However, in order to employ such a configuration, it is necessary to connect the rear end of the seat along the rear frame element, and the frame and seat of such a chair are integrally formed as a whole. In many cases, a high dimensional accuracy is required to make the rear end of the seat follow the rear frame element, and there is a problem that it is difficult to manufacture.

  The present invention aims to solve such problems.

  That is, the chair according to the present invention has a pair of left and right front legs, a front frame element that connects the front legs, a pair of left and right rear legs, and a rear frame that connects the rear legs in order to solve the problems described above. A stackable chair comprising: a frame having an element; a seat supported by the rear frame element and the front frame element of the frame; and a backrest supported by the frame; The seat is formed by associating a tongue piece projecting forward and a slit which is formed in the thickness dimension of the seat so as to open at the rear end surface of the seat and which can be engaged with the tongue piece. It is supported by the rear frame element.

  If it is such, the shape of the rear-end part of a seat can be made into the shape along a rear frame element by engaging the said tongue piece and the said slit, and supporting a seat to a rear frame element. That is, the rear end portion of the seat can be made to follow the rear frame element without requiring high dimensional accuracy in the manufacture of the frame and the seat, and the manufacture of such a chair can be facilitated. And since the said slit is formed in the thickness dimension of the seat, if the rear frame element is positioned in the thickness dimension of the seat, the thickness dimension of the seat portion of the chair as a whole is suppressed. Thus, the stacking pitch can be reduced.

  In order to suppress the thickness dimension of such a backrest portion of the chair, a tongue piece provided so as to protrude upward from the rear frame element and a thickness of the backrest by opening the lower end surface of the backrest are provided. It is preferable that the backrest is attached to the rear frame element by engaging with a slit which can be engaged with the tongue piece while being formed within the size. This is because the backrest can be attached to the rear frame element with the same structure as the seat.

  In particular, in order to improve the appearance of the boundary between the chair seat and the backrest, it is desirable that the rear frame element is visible from between the seat and the backrest.

  Further, in order to more securely support the seat on the frame, a pressing means is provided between the seat and the front frame element to give the seat an action from the front to the rear and press the seat toward the front frame element. It is preferable that the seat is abutted against the rear frame element by the pressing force received from the pressing means. This is because the seat can be supported by being sandwiched by the pressing force received from the pressing means and the drag received by the seat from the rear frame element.

  Furthermore, in order to ensure positioning of the chair seat with respect to the frame, the tongue piece is provided with a cut-and-raised piece, and the seat can be engaged with the cut-and-raised piece. What provided the window part is desirable. This is because it is possible to prevent the seat from slipping forward by associating the cut and raised piece with the window portion.

  In order to make it easy to grip and carry such a chair, it is desirable that the rear end of the seat has a notch that allows a hand to pass through.

  According to the configuration of the chair according to the present invention, the rear end of the seat can be shaped along the rear frame element by engaging the tongue piece and the slit and supporting the seat on the rear frame element. . That is, since the shape of the rear end portion of the seat can follow the rear frame element without requiring high dimensional accuracy when manufacturing the frame and the seat, the manufacture of such a chair can be facilitated. And since the slit is formed within the thickness dimension of the seat, if the rear frame element is positioned within the thickness dimension of the seat, the strength of the seat and the rear frame element is secured as a whole. The thickness dimension of the seat portion of the chair can be suppressed to reduce the stacking pitch, and the storage efficiency can be improved.

  Hereinafter, an embodiment of the present invention will be described.

  As shown in FIGS. 1 to 3, the chair C according to the present embodiment includes a frame 1, a seat 2 that is supported by the frame 1, and a backrest 3 that is supported by the frame 1. .

  1 to 7, the frame 1 includes a pair of left and right front legs 11 and 11, a pair of left and right rear legs 12 and 12, a lower end portion of the front leg 11, and a lower end portion of the rear leg 12. And a pair of left and right bases 13 connected to each other, a front frame element 14 connecting between the pair of left and right front legs 11, 11, and left and right 1 extended from the upper ends of the rear legs 12, 12. A pair of back support rods 15, 15, a rear frame element 16 connecting between the upper ends of the left and right pair of rear legs 12, 12, a front frame element 14 and the rear frame element 16 are connected and seated 2 and a pair of left and right seat frame elements 17, 17 on which 2 is placed. In the present embodiment, portions of the frame 1 other than the rear frame element 16 and the seat frame element 17 are integrally formed by bending one steel material. Both ends of the rear frame element 16 are connected to the upper ends of the left and right rear legs 12 by welding. Both ends of the seat frame element 17 are connected to the front frame element 14 and the rear frame element 16 by welding. The distance between the rear legs 12 and 12 is larger than the distance between the front legs 11 and 11 so that stacking is possible.

  As shown in FIGS. 1 to 5, the base 13 is provided with the resin grounding member 131 separately. When the chair C is used, the grounding member 131 is in contact with the ground surface of the space where the chair C is installed or the grounding surface which is the ground. When the chair C is stacked, the grounding member 131 is in contact with the grounding member 131 of another chair C. Define the stacking pitch.

  As shown in FIGS. 4 to 9, the rear frame element 16 has a first tongue 161 projecting forward and a second tongue 162 projecting upward. These first and second tongue pieces 161 and 162 are both connected to the rear frame element 16 by welding. Further, a cut-and-raised portion 161 a that protrudes downward is provided at the center of the first tongue piece 161.

  On the other hand, the seat 2 is integrally formed of resin in the present embodiment. The seat 2 is set to have a thickness slightly smaller than the diameter of the rear frame element 16. Further, as shown in FIGS. 6, 7, and 8, the rear end surface 2 a is formed within the thickness dimension of the seat 2 and can be engaged with the first tongue piece 161. Are opened. Further, on the lower surface of the seat 2, there is provided a window portion 2b that communicates with the slit 2a1 and can engage with the cut and raised portion 161a of the first tongue piece 161. The opening edge of the window portion 2b is engaged with the rear end of the cut and raised portion 161a.

  Further, as shown in FIGS. 1, 5, 6, and 7, a notch 2c through which a hand can pass is provided at the rear end of the central portion in the width direction of the seat 2. . That is, the seat 2 is separated from the rear frame element 16 at the position in the width direction corresponding to the notch 2c, and is in contact with the rear frame element 16 at substantially no gap at other portions.

  In addition, as shown in FIGS. 2, 3, and 10, a hanging piece 21 that protrudes downward is provided at the front portion of the seat 2. The hanging piece 21 is located in front of the front frame element 14 and is in contact with the front frame element 14. Then, as shown in FIG. 10, between these hanging pieces 21 and the front frame element 14, an action from the front to the rear is given to the seat 2, and the seat 2 is pressed toward the front frame element 14. Means F are provided. The seat 2 is abutted against the rear frame element 16 by the pressing force received from the pressing means F. Specifically, the hanging piece 21 is provided with a screw passage hole 21a through which the male screw member 22 can pass, and the front frame element 14 has a female screw hole 14a1 through which the male screw member 22 can be screwed. Is provided. Then, when the male screw member 22 is screwed into the female screw hole 14a in a state where the screw passage hole 21a and the female screw hole 14a are superposed, it is generated between the head 221 of the male screw member 22 and the front frame element 14. Due to the fastening force, the seat 2 is subjected to an action toward the rear, and abuts against the rear frame element 16. In addition, two pairs of ribs 23 are provided on the bottom surface of the seat 2 so as to be positioned on the left and right sides of the seat receiving frame element 17, and the seat receiving frame element 17 is stored between the pair of ribs 23. By doing so, the seat 2 is positioned in the width direction with respect to the frame 1.

  Further, the backrest 3 is also integrally formed of resin in the present embodiment. As shown in FIG. 5, support holes 3 a into which a support portion 151 having a reduced diameter provided at the distal end portion of the back support rod 15 can be inserted at both left and right ends of the backrest 3. On the other hand, the lower end surface 3b of the intermediate portion of the backrest 3 is formed within the thickness dimension of the backrest 3 and can be engaged with the second tongue piece 162 as shown in FIG. The slit 3b1 is opened. Then, as shown in FIG. 9, the backrest 3 is inserted into the support hole 3a by inserting the support portion 151 of the back support rod 15 and engaging the second tongue piece 162 with the slit 3b1. It is attached to the frame 1. 9 (a) shows the state of engagement between the slit 3b1 at both ends in the width direction and the second tongue piece 162, and FIG. 9 (b) shows the slit 3b1 at the center in the width direction. And the second tongue piece 162 are respectively shown in an engaged state.

  Here, with the seat 2 and the backrest 3 attached to the rear frame element 16, a gap S having a substantially constant width is formed between the seat 2 and the backrest 3. The rear frame element 16 is visible from the gap S.

  The seat 2 is attached to the frame 1 of the chair C configured as described above as follows.

  First, the rear end surface 2 a of the seat 2 is opposed to the rear frame element 16. Next, the width direction and the height direction position of the slit 2a1 of the rear end surface 2a of the seat 2 and the first tongue piece 161 of the rear frame element 16 are substantially matched, and the first tongue piece 161 is inserted into the slit. The seat 2 is moved backward to be inserted into 2a1. At that time, the cut-and-raised portion 161a is temporarily retracted upward, and returns to a state where the cut-and-raised portion 161a and the window portion 2b protrude downward when the positions in the depth direction coincide with each other. Opposite. Here, by engaging the first tongue piece 161 and the slit 2 a 1, the shape of the rear end surface 2 a of the seat 2 is elastically deformed into a shape substantially along the rear frame element 16. Thus, after temporarily determining the position of the seat 2 in the front-rear direction, the seat receiving frame element 17 is positioned between the ribs 23 of the seat. Then, the screw passage hole 21a of the hanging piece 21 of the seat 2 and the female screw hole 14a of the front frame element 14 are superposed, the male screw member 22 is screwed into the female screw hole 14a1, and the seat 2 is moved backward by a fastening force. Press on.

  On the other hand, the backrest 3 is attached to the frame 1 of the chair C configured as described above as follows.

  First, the distal end portion of the support portion 151 of the back support rod 15 is inserted into the support hole 3a. Next, the slit 3b1 on the lower end surface 3b of the backrest 3 is engaged with the second tongue piece 162 of the rear frame element 16, and the backrest 3 is placed so that the second tongue piece 162 is accommodated in the slit 3a1. Move down. At that time, the lower end surface 3 b of the backrest 3 is elastically deformed into a shape substantially along the rear frame element 16. Then, the backrest 3 is further moved downward, and the support portion 151 of the back support rod 15 is completely inserted into the support hole 3a, and the second tongue piece 162 is completely inserted into the slit 3a1. Let

  As described above, according to the configuration of the chair C according to the present embodiment, the first tongue piece 161 provided to protrude forward from the rear frame element 16 and the rear end surface 2a of the seat 2 are opened. Since the seat 2 is formed within the thickness dimension of the seat 2 and the slit 2a1 engageable with the first tongue piece 161 is engaged, the seat 2 is supported by the rear frame element 16. By engaging the first tongue piece 161 and the slit 2a1, the shape of the rear end surface 2a of the seat 2 is elastically deformed into a shape substantially along the rear frame element 16, and the rear end surface 2a of the seat 2 is changed to the rear frame element. 16 can be brought into close contact with each other. That is, a configuration in which the rear end surface 2a of the seat 2 can be substantially adhered to the rear frame element 16 can be realized without requiring high dimensional accuracy, and the manufacture of such a chair C can be facilitated. The slit 2a1 is formed within the thickness dimension of the seat 2, and the rear frame element 16 is positioned within the thickness dimension of the seat 2, so that the strength of the seat 2 and the rear frame element 16 is secured. The stacking pitch can be reduced by suppressing the thickness dimension of the chair C as a whole.

  In addition, a second tongue piece 162 provided so as to protrude upward from the rear frame element 16 and a lower end surface 3b of the backrest 3 are formed within the thickness dimension of the backrest 3. Since the backrest 3 is attached to the rear frame element 16 in association with the slit 3b1 that can be engaged with the second tongue piece 162, the same structure as the attachment structure of the seat 2 to the frame 1 as described in the previous stage. The lower end of the backrest 3 can be similarly attached to the rear frame element 16 by the structure. That is, the second tongue piece 162 and the slit 3b1 are engaged with each other while the shape of the lower end portion of the backrest 3 is elastically deformed in accordance with the shape of the rear frame element 16, and the lower end surface 3b of the backrest 3 is The rear frame element 16 can be substantially in close contact. Moreover, the thickness dimension of the backrest 3 part can be suppressed while ensuring the strength of the backrest 3.

  Further, a gap S having a substantially constant width is formed between the seat 2 and the backrest 3 so that the rear frame element 16 is visible from the gap S. The appearance of the boundary between 2 and backrest 3 can be arranged.

  Further, a pressing means F is provided between the seat 2 and the front frame element 14 to give the seat 2 an action from the front to the rear, and press the seat 2 toward the front frame element 14. Since the seat 2 is abutted against the rear frame element 16 by the pressing force received from the rear frame element 16, the pressing force by the pressing means and the drag force received by the seat 2 in the state of abutting against the rear frame element 16 from the rear frame element 16 are as follows. The seat 2 can be supported by being sandwiched between the head 221 of the male screw member 22 of the pressing means F and the rear frame element 16. Therefore, the seat 2 can be more reliably supported by the frame 1.

  Further, the cut-and-raised portion 161a is provided on the first tongue piece 161, and the window 2b that can be engaged with the cut-and-raised portion 161a is provided on the seat 2. 161a and the window portion 2b can be engaged with each other to prevent the seat 2 from slipping forward. Such positioning of the seat 2 of the chair C with respect to the frame 1 can be reliably performed.

  And since it has the notch part 2c which can let a hand pass to the rear-end part of the said seat 2, it is in a mode as shown in FIG. 11 in the case of conveyance, and in FIG. Each of the chairs C can be gripped in the manner shown, and such a chair C can be easily gripped and transported.

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

  For example, an attachment structure in which the second tongue piece and the slit on the lower end surface of the backrest are omitted and only the back support rod and the support hole are engaged may be employed. On the other hand, the second tongue piece is provided with a cut-and-raised portion in the same manner as the first tongue piece in the above-described embodiment, and a window portion or a recess that can be engaged with the cut-and-raised portion is provided on the backrest side. The backrest and the rear frame element may be positioned relative to each other by associating the cut-and-raised part with the window part or the recessed part.

  In the above-described embodiment, a gap is formed between the backrest and the seat. However, the backrest and the seat may be adjacent to each other substantially or completely without a gap.

  Further, an elastic piece that strikes the front frame element from the rear from the front portion of the seat and applies an action toward the rear by the elastic force may be provided to be suspended, and a pressing means may be provided by using the elastic piece. . In this case, a holding piece that protrudes forward from the lower end portion of the elastic piece and is held by the front frame element is provided, and a retaining piece that protrudes upward from the front end of the holding piece and hits the front frame element from the front is provided. Further, it is preferable that the front frame element is arranged in a space defined by the elastic piece, the hugging piece, and the retaining piece. Further, such a pressing means may be omitted, and the seat and the front frame element may be connected from above or below the seat using screws or the like.

  In addition, the cut-and-raised part of the tongue piece is omitted. For example, in addition to the hanging piece (hereinafter referred to as the first hanging piece) that strikes the front frame element from the front on the seat, the second hanging piece that strikes from the rear side. May be provided on the seat, and the movement of the seat in the front-rear direction may be restricted by the first and second hanging pieces.

  And the notch part of the rear-end part of a seat may be omitted.

  In addition, various changes may be made without departing from the spirit of the present invention.

The perspective view which shows the chair which concerns on one embodiment of this invention. The front view which shows the chair which concerns on the embodiment. The side view which shows the chair which concerns on the embodiment. The principal part perspective view which shows the state which removed the seat of the chair which concerns on the embodiment. The principal part perspective view which shows the state which removed the backrest of the chair which concerns on the embodiment. The perspective view which shows the attachment aspect of the seat of the chair which concerns on the embodiment. The bottom view which shows the rear-end part of the seat of the chair which concerns on the embodiment. XX sectional view in FIG. The longitudinal cross-sectional view which shows the attachment location to the back frame element based on the backrest which concerns on the embodiment. FIG. 8 is a YY cross-sectional view in FIG. 7. The figure which shows an example of the holding | grip aspect of the chair which concerns on the embodiment. The figure which shows an example of the holding | grip aspect of the chair which concerns on the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Frame 11 ... Front leg 12 ... Rear leg 14 ... Front frame element 16 ... Rear frame element 161 ... 1st tongue piece 162 ... 2nd tongue piece 2 ... Seat 2a ... Seat rear end surface 2a1 ... Slit 3 ... Backrest 3b ... Lower end surface of backrest 3b1 ... Slit

Claims (6)

A frame having a pair of left and right front legs, a front frame element connecting the front legs, a pair of left and right rear legs, and a rear frame element connecting the rear legs, and supported by the rear frame element and the front frame element of the frame A stackable chair having a seat back and a backrest supported by the frame, wherein the tongue is provided to project forward from the rear frame element, and is opened to the rear end surface of the seat. The seat is formed within the thickness dimension of the seat, and the seat is supported by the rear frame element by engaging a slit that can be engaged with the tongue piece. A tongue piece that protrudes upward from the rear frame element, and a slit that is open in the lower end surface of the backrest and is formed within the thickness dimension of the backrest and that can engage with the tongue piece; The chair according to claim 1, wherein a backrest is attached to the rear frame element by engaging each other. The chair according to claim 2, wherein the rear frame element is visible from between the seat and the backrest. Between the seat and the front frame element, there is provided a pressing means for giving the seat an action from the front to the rear to press the seat toward the front frame element, and the seat is moved by the pressing force received from the pressing means. The chair according to claim 1, 2, or 3 adapted to abut against the chair. The chair according to claim 1, 2, 3, or 4, wherein the tongue piece is provided with a cut-and-raised piece, and the seat is provided with a window portion capable of engaging with the cut-and-raised piece. The chair according to claim 1, 2, 3, 4, or 5 having a notch that allows a hand to pass through at a rear end of the seat.

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