JP2017099737A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair in which a back cover hardly gets out of position with respect to a backrest body.SOLUTION: A chair comprises a backrest comprising a backrest body and a back cover for covering the backrest body. The back cover has a cover body which has a bag-state part for covering the backrest body, and a base member attached to an inner face of the cover body. The base member has an engagement part engaged with a lower part of the backrest body. According to such a configuration, the back cover hardly gets out of position to the backrest body, in the chair of the invention.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a chair suitably used in an office or the like.

  Conventionally, a chair in which a back cover is attached to a backrest body is known (see, for example, Patent Document 1).

  Since the back cover directly receives the load of the seated person, the back cover easily moves relative to the backrest body when receiving the load of the seated person. If the back cover is displaced with respect to the backrest and the back cover is moved greatly from its original position, the appearance may be damaged, or the comfortable feeling of the seated person may be disturbed. It was a thing.

JP 2010-259692 A

  This invention is made paying attention to the above situations, and is providing the chair provided with the structure which can suppress suitably that a back cover shifts | deviates with respect to a backrest main body. .

  That is, the present invention has the following configuration.

  The invention according to claim 1 is a chair comprising a backrest having a backrest main body and a back cover covering the backrest main body, wherein the back cover covers the backrest main body. And a base member disposed on the inner surface side of the cover body and engaged with the cover body. The base member is engaged with the lower portion of the backrest body. The chair has a joint.

  Invention of Claim 2 is a chair of Claim 1 whose said engaging part is a hook-shaped thing engaged with the lower end part of the said backrest main body.

  According to a third aspect of the present invention, the cover main body is mainly composed of a stretchable material, and the base member includes a plate-shaped base member main body and a lower portion of the base member main body. It is the chair of Claim 1 or 2 provided with the said engaging part provided.

  According to a fourth aspect of the present invention, in the chair according to the first, second or third aspect, the inner surface of the upper end portion of the cover body includes a positioning member extending in the left-right direction and engaging with the upper end portion of the backrest body. is there.

  According to a fifth aspect of the present invention, the backrest main body includes a recessed portion that is recessed upward in a front view at the central portion in the left-right direction at the lower end portion, and the engaging portion is engaged with the recessed portion. The chair according to claim 1, 2, 3 or 4.

  According to a sixth aspect of the present invention, left and right armrests extending in the front-rear direction are provided on the left and right sides of the backrest body, and the cover body is mainly composed of a stretchable material. The base member includes a base member main body having a plate shape and the engaging portion provided at a lower portion of the base member main body, and the base member main body includes a base end portion of the armrest. 6. The chair according to claim 5, wherein the chair extends in an outward direction from an imaginary line connecting the side portions of the recessed portion and is provided so as to be along the outer surface of the backrest main body, and is provided with a turning prevention portion.

  According to a seventh aspect of the present invention, the cover main body includes an opening through which the backrest main body is inserted, and the opening is configured to be openable and closable via connection means, The base member includes a base member main body having a plate shape and the engaging portion provided at a lower portion of the base member main body, and the base member main body can accommodate a part of the connection means. It is a chair of Claim 1, 2, 3, 4, 5 or 6 provided with the part.

  According to an eighth aspect of the present invention, the cover main body has a bag shape for accommodating the base member, and includes a base member accommodating portion having an opening that can expose the engaging portion to the outside. The chair according to 1, 2, 3, 4, 5, 6 or 7.

  According to a ninth aspect of the present invention, the base member is a front base member disposed on the front side of the cover body and a base member disposed on the rear side of the cover body, and the front base The chair according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein the engaging portion of the member and the engaging portion of the rear base member are provided at positions where they do not interfere with each other. .

  As described above, according to the present invention, it is possible to provide a chair having a configuration capable of suitably suppressing the back cover from moving with respect to the backrest body.

The perspective view which shows one Embodiment of this invention. The front view in the embodiment. The rear view in the embodiment. The right view in the same embodiment. The top view in the embodiment. The exploded perspective view in the embodiment. The exploded perspective view in the embodiment. The rear view for demonstrating the inner surface side of the front base member in the same embodiment. The front view for demonstrating the inner surface side of the base member after the back in the same embodiment. The perspective view of the base member before in the same embodiment. The perspective view of the base member after in the embodiment. The XX line end view in FIG. The perspective view which shows the back cover which is other embodiment. FIG. The rear view in the embodiment. The front view in the embodiment. The rear view for demonstrating the cover main body of the embodiment. The front view for demonstrating the cover main body of the embodiment. The VV line end view in FIG. The WW line | wire end surface figure in FIG.

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

  In this embodiment, the present invention is applied to a chair A using a pipe material. This chair A is preferably used in, for example, an office or a general meeting room.

  The chair A includes a support frame B, a seat C supported by the support frame B, a backrest D extending upward from the rear end portion of the seat C, and forward from both sides of the backrest D. Equipped with an extended armrest E. The backrest D includes a backrest main body F formed of a synthetic resin, and a back cover G that covers the backrest main body F. The armrest E is integrally formed of the backrest main body F and the synthetic resin.

  Hereinafter, each structure of this chair A is explained in full detail.

<< Support frame B >>
The support frame B is mainly composed of a metal pipe material. The support frame B has a rear leg b1 connected to the lower part of the backrest main body F at the upper end, a base b2 extending forward from the lower end of the rear leg b1, and a front end of the base b2. The front leg b3 stands up, and the seat b4 that continues to the upper end of the front leg b3 and extends rearward. The rear end portion of the seat b4 is connected to the lower portion of the backrest main body F.

<< seat C >>
The seat C is supported by the support frame B. The seat C includes a seat peripheral portion c1 having a portion that directly engages with the support frame B, and a seat intermediate portion c2 surrounded by the peripheral portion c1. The seat peripheral edge portion c1 and the seat intermediate portion c2 are integrally formed of synthetic resin. The seat peripheral edge portion c1 is formed thicker than the seat intermediate portion c2. In this embodiment, the seat intermediate part c2 is formed in a mesh shape.

  The seat peripheral edge c1 has a substantially rectangular frame shape in plan view, and a standing peripheral wall c12 is provided on the rear peripheral edge c11 located at the rear end. The standing wall c12 is erected between the left and right rear legs b1 so as to connect the left and right rear legs b1 in the support frame B. The upright wall c12 is provided at a central portion in the left-right direction and has a lower recessed portion a1 that is recessed downward, and a substantially horizontal upper edge that is provided on the left and right of the lower recessed portion a1 and is connected to the lower end edge a5 of the backrest main body F. a2.

<< Backrest D >>
The backrest D includes a backrest body F made of synthetic resin and a back cover G that covers the backrest body F.

<Backrest body F>
The backrest main body F has a plate shape, and has a curved shape such that the central portion is convex rearward in plan view. The backrest main body F includes a bent portion a3 that bends backward in a side view in the upper end portion.

  The backrest main body F is integrally provided with an upper main body portion f1 constituting an upper backrest surface and a lower main body portion f2 constituting a lower backrest surface. The left-right width dimension of the upper main body part f1 is set shorter than the left-right width dimension of the lower main body part f2. The left-right width dimension of the lower main body part f2 is substantially matched with the width dimension of the rear peripheral edge part c11 in the seat C. The armrests E are provided on the left and right side portions at the boundary portion between the upper main body portion f1 and the lower main body portion f2 so as to protrude outward in a front view. The left-right width dimension of the upper main body part f1 is set shorter than the separation dimension between the left and right bases b2 of the support frame B. The left-right width dimension of the lower main body part f2 is set to be approximately equal to the separation between the left and right bases b2 of the support frame B.

  The front surface of the lower main body part f2 is substantially flush with the entire surface, and has a shape curved inward in plan view. On the back surface of the lower main body portion f2, a left raised portion r1 that has a substantially L shape that is continuous with the left portion at the left end portion and the lower end portion, and a substantially L shape that is continuous with the right portion at the right end portion and the lower end portion And a right raised portion r2 is formed. A cover portion 12 on the rear side of the cover body 1 to which the rear base member 3 is attached is attached to a recessed portion p formed between the left and right raised portions r1 and r2.

  The backrest main body F includes an upper recessed portion a4 that is a recessed portion that is recessed upward in a front view at the center in the left-right direction at the lower end. On the left and right sides of the upper concave portion a4, a substantially horizontal lower end edge portion a5 connected to the upper end edge portion a2 of the rear peripheral edge portion c11 in the seat C is provided. These lower end edges a5 are in contact with the upper end edge a2 of the seat C. And the long hole n extended in the left-right direction is formed by the lower recessed part a1 of the seat C in the middle position, and the upper recessed part a4 of the backrest D. In this embodiment, the front engaging portion 22 of the base member 2 before the back cover G and the rear engaging portion of the rear base member 3 are formed at the edge of the upper concave portion a4 that forms the long hole n. 32 are associated with each other.

<Back cover G>
The back cover G can cover at least a part of the backrest main body F. The back cover G covers substantially the entire area of the upper main body portion f1 in the backrest main body F and covers the front and rear regions of the lower main body portion f2 excluding the left and right side end portions and the left and right portions in the lower end portion of the lower main body portion f2. It has become. The back cover G includes a cover body 1 having a bag-like portion h that covers the backrest body F, and front and rear base members 2 and 3 that are arranged on the inner surface side of the cover body 1 and engage with the cover body. It becomes.

  First, the cover body 1 will be described.

  The cover body 1 is mainly composed of an elastic sheet-like material. In this embodiment, the cover body 1 is mainly composed of cloth. The cover main body 1 includes a front cover portion 11 mainly disposed on the front side of the backrest main body F and a rear cover portion 12 mainly disposed on the rear surface side of the backrest main body F. By sewing together the upper edge portions of the front and rear cover portions 11 and 12 and the upper portions of the side edge portions, a bag-like portion h opened downward is formed.

  The front cover portion 11 of the cover body 1 includes a front extending portion 11a that extends downward from the bag-shaped portion h and has a side end portion and a lower end portion that are not connected to the rear cover portion 12. The cover portion 12 after the cover body 1 includes a rearward extending portion 12a that extends downward from the bag-shaped portion h and whose side end portion and lower end portion are not connected to the front cover portion 11. ing. A front base member 2 to be described later is attached to the inner surface side of the front extension portion 11a by a fastening tool t, and a rear base member 3 to be described later is fixed to the inner surface side of the rear extension portion 12a. It is attached with the tool t.

  The cover main body 1 includes an opening K through which the backrest main body F is inserted, and the opening K is configured to be openable and closable via a fastener j that is a connecting means.

  The fastener j is provided at the lower end of the cover body 1. The fastener j is sewn to the cover body 1. The fastener j is a belt-like or linear first and second fastener member j1, j2 having teeth (not shown) at the end, and the teeth of the first and second fastener members j1, j2. And a slider j3 for meshing and releasing the meshed state. The fastener j is a normal one that can open and close the opening K.

  In this embodiment, the first fastener member j1 has only the center portion in the left-right direction, and the center portion in the left-right direction at the lower end portion of the front cover portion 11, that is, the upper concave portion of the backrest body F in the front cover portion 11. It is sewn at a position corresponding to the part a4.

  In this embodiment, the second fastener member j2 has only the center portion in the left-right direction at the center portion in the left-right direction at the lower end portion of the rear cover portion 12, that is, the upper concave portion of the backrest body F in the rear cover portion 12. It is sewn at a position corresponding to the part a4. The slider j3 is slidably attached to one of the first and second fastener members j1 and j2 so as not to be detached.

  On the inner surface of the upper end portion of the cover main body 1, a belt-like positioning member 13 that extends in the left-right direction and engages with the upper end portion of the backrest main body F is provided. The positioning member 13 is a belt-like member having a certain elasticity, and is formed of a synthetic resin in this embodiment. The positioning member 13 is arranged along a boundary portion between the upper edge portion of the front cover portion 11 and the upper edge portion of the rear cover portion 12. The positioning member 13 is sewn to the front cover part 11 and / or the rear cover part 12.

  A cushion material 14 is fastened to the inner surface side of the front cover portion 11 by an appropriate method such as sewing or adhesion in order to impart cushioning properties or to provide mounting stability.

  Next, the base member 2 before being a base member and the base member 3 after being a base member will be described.

  The front base member 2 includes a plate-like base member main body 21 and a front engagement portion 22 that is a hook-shaped engagement portion provided at a lower portion of the base member main body 21.

  The base member main body 21 in the front base member 2 is continuously provided on the side edge and the lower edge, and the cover holding edge portion 21a with which the edge of the front cover 11 is engaged, and the cover holding edge. And an intermediate portion 21b provided inside the portion 21a. The cover holding edge portion 21a is more rigid than the intermediate portion 21b and is thicker than the intermediate portion 21b. The intermediate portion 21b has a shape in which an upper portion is cut out in an arc shape and is recessed downward.

  An end edge portion of the front cover portion 11 is attached to the cover holding edge portion 21 a of the front base member 2. That is, the lower side edge portion 111 of the front cover portion 11 and the left and right lower edge portions 112 of the front cover portion 11 are attached to the cover holding edge portion 21a by the fastening device t (tacker stop). It has been. The front cover portion 11 wraps around the outer end edge of the cover holding edge portion 21a from the front side. The ends of the lower side edge portion 111 and the left and right lower end edge portions 112 of the front cover portion 11 are located on the back side of the cover holding edge portion 21a, and the vicinity of the end is the cover. The holding edge portion a21 is tacked to the back surface.

  The front engaging portion 22 is integrally provided at the lower end portion of the cover holding edge portion 21a in the front base member main body 21. The front engaging portions 22 are arranged in pairs on the left and right. The front engaging portion 22 is engaged with an upper recessed portion a4 that is a lower portion of the backrest main body F. More specifically, the front engagement portion 22 is a hook-like member that is hooked to the lower portion of the backrest main body F, that is, the edge of the upper recessed portion a4 formed at the lower edge.

  A concave portion a6 for avoiding interference with a rear engagement portion 32 of the rear base member 3 to be described later is provided in an inner portion of the front engagement portion 22 in the cover holding edge portion 21a. In other words, the front engagement portion 22 of the front base member 2 and the rear engagement portion 32 of the rear base member 3 are provided at positions that do not interfere with each other when engaged with the upper concave portion a4.

  As shown in FIG. 2, the base member main body 21 in the front base member 2 extends outward from an imaginary line s connecting the base end portion of the armrest E and the side portion of the upper recessed portion a <b> 4. That is, the base member main body 21 is arranged along the outer surface of the backrest main body F, and is provided with a stap prevention portion m1 that extends outward from the virtual line a. In this embodiment, the turn-up preventing portion m1 is mainly configured by both end portions of the cover holding edge portion 21a.

  The base member main body 21 in the front base member 2 includes a housing portion s1 that is a recessed region for housing the outer portion y that is an excess portion of the fastener j. That is, the cover holding edge portion 21a of the base member main body 21 is formed thicker than the intermediate portion 21b, and the accommodating portion s1 is formed on the back side of the intermediate portion 21b in cooperation with the cover holding edge portion 21a. ing. By accommodating the outer portion y of the fastener j in the housing portion s1, it is preferable to prevent the convex portion due to the presence of the outer portion y of the fastener j from appearing on the outer surface side of the cover body 1. It has become a thing.

  The base member main body 21 of the previous base member 2 is provided with a display portion g1 indicating the letters “front” for convenience during assembly. By this display part g1, confusion with the subsequent base member 3 is suitably suppressed during assembly.

  Further, the base member main body 21 of the front base member 2 is less curved in plan view than the backrest main body F in a no-load state, that is, when the front engagement portion 22 is not engaged with the backrest main body F. It is set to be. Then, when the front engaging portion 22 arranged with a space left and right in the front base member 2 is engaged with the upper recessed portion a4 of the backrest main body F, the base member main body 21 is elastically deformed, It will be drawn to the backrest main body F side. More specifically, the left and right portions of the base member main body 21 are constantly urged toward the backrest main body F by the elastic deformation force that attempts to return to the unloaded posture. Since the left and right portions of the base member main body 21 are provided with the anti-turning portion m1 as described above, the anti-turning portion m1 is turned over with respect to the backrest main body F depending not only on the material of the base member main body 21, but also on the shape. It has a difficult structure.

  The rear base member 3 includes a plate-like base member main body 31 and a rear engagement portion 32 which is a hook-shaped engagement portion provided at the lower portion of the base member main body 31.

  The base member main body 31 in the rear base member 3 is continuously provided on the side edge and the lower edge, and the cover holding edge portion 31a with which the edge of the rear cover 12 is engaged, and the cover holding edge. And an intermediate portion 31b provided inside the portion 31a. The cover holding edge portion 31a is more rigid than the intermediate portion 31b and is thicker than the intermediate portion 31b. The intermediate portion 31b has a shape in which an upper portion is notched and is recessed downward.

  An end edge portion of the rear cover portion 12 is attached to the cover holding edge portion 31 a of the rear base member 3. That is, the lower side edge portion 121 in the rear cover portion 12 and the left and right lower edge portions 122 in the rear cover portion 12 are attached to the cover holding edge portion 31a by the fastening tool t (tacker stop). It has been. The rear cover portion 12 wraps around the outer end edge of the cover holding edge portion 31a from the rear side. The end of the lower side edge portion 121 and the end of the left and right lower edge portions 122 of the rear cover portion 12 are located on the front side of the cover holding edge portion 31a, and the portion near the end is a cover. The holding edge portion 31a is tacked to the front surface.

  The rear engagement portion 32 is integrally provided at the lower end portion of the cover holding edge portion 31a in the rear base member main body 31. The rear engagement portions 32 are arranged in pairs on the left and right. The rear engaging portion 32 is engaged with the upper recessed portion a4 that is the lower portion of the backrest main body F. More specifically, the rear engagement portion 32 has a hook shape that is hooked on the edge of the upper concave portion a4 formed at the lower end portion of the backrest main body F.

  A concave portion a7 for avoiding the interference with the front engagement portion 22 of the front base member 2 described above is provided in the outer portion of the rear engagement portion 32 in the cover holding edge portion 31a. In other words, the front engagement portion 22 of the front base member 2 and the rear engagement portion 32 of the rear base member 3 are provided at positions that do not interfere with each other when engaged with the upper concave portion a4. In addition, a bottom plate 33 is installed between the rear engaging portions 32 arranged in a pair on the left and right sides so as to contact and engage with the edge of the upper recessed portion a4.

  As shown in FIG. 3, the base member main body 31 in the rear base member 3 extends outward from an imaginary line s connecting the base end portion of the armrest E and the side portion of the upper recessed portion a <b> 4. That is, the base member main body 31 is arranged along the outer surface of the backrest main body F, and is provided with a stap prevention portion m2 that extends outward from the imaginary line a. In this embodiment, the turn-up preventing portion m2 is configured mainly with both end portions of the cover holding edge portion 31a.

  The base member main body 31 in the rear base member 3 includes a housing portion s2 that is a recessed region for housing the outer portion y that is an excess portion of the fastener j. That is, the cover holding edge portion 31a of the base member main body 31 is formed thicker than the intermediate portion 31b, and the housing portion s2 is formed on the front side of the intermediate portion 31b in cooperation with the cover holding edge portion 31a. ing. By accommodating the outer portion y of the fastener j in the housing portion s2, it is preferable to prevent the convex portion due to the presence of the outer portion y of the fastener j from appearing on the outer surface side of the cover body 1. It has become a thing. The left and right portions of the fastener j may be housed in the housing portion s1 of the front base member 2 or may be housed in the housing portion s2 of the rear base member 3.

  The base member main body 31 of the rear base member 3 is provided with a display portion g2 indicating the letters “rear” for convenience during assembly. By this display part g2, confusion with the previous base member 2 is suitably suppressed during assembly.

  Further, the base member main body 31 of the rear base member 3 has a larger degree of curvature in plan view than the backrest main body F in a no-load state, that is, in a state where the rear engagement portion 32 is not engaged with the backrest main body F. It is set to be. Then, when the rear engagement portion 32 arranged with a space left and right in the rear base member 3 is engaged with the upper recessed portion a4 of the backrest main body F, the base member main body 31 is elastically deformed, It will be drawn to the backrest main body F side. More specifically, the left and right portions of the base member main body 31 are constantly urged toward the backrest main body F by the elastic deformation force that attempts to return to the unloaded posture. The left and right portions of the base member main body 31 are provided with the anti-turning portion m2 as described above. Therefore, the anti-turning portion m2 is turned up against the backrest main body F depending not only on the material of the base member main body 31 but also on the shape. It has a difficult structure.

<Armrest E>
The armrests E are provided as a pair on the left and right sides, and are provided integrally on the left and right sides of the backrest main body F. The armrest E is formed integrally with the backrest main body F and resin, and the rear end is connected to the backrest main body F. The rear end portion of the armrest E is connected to the side portion of the backrest main body F, that is, the middle portion in the vertical direction at the left and right side edge portions. The longitudinal dimension of the armrest E is set to be relatively short, and is supported by the backrest body F in a cantilevered manner.

  The armrest E has a base end portion connected to the backrest main body F, and extends in a front view so as to extend along the base b2 of the support frame B from the base end portion e1 extending obliquely forward and outward in a plan view and the base end portion e1. And a main body portion e2. The main body portion e2 is set so as to be positioned outside the left and right bases b2 in plan view.

  As described above, the chair A according to the present embodiment includes the backrest D having the backrest main body F and the back cover G that covers the backrest main body F. The back cover G includes a cover main body 1 having a bag-like portion h that covers the backrest main body F, and front and rear base members 2 and 3 attached to the inner surface of the cover main body 1. The front base member 2 includes a front engagement portion 22 that engages with the lower portion of the backrest main body F, and the rear base member 3 engages with the lower portion of the backrest main body F. It has. For this reason, the chair A provided with the structure which can suppress suitably that the back cover G shifts | deviates with respect to the backrest main body F can be provided. That is, since the front and rear base members 2 and 3 attached to the inner surface of the cover body 1 are engaged with the lower part of the backrest body F, the cover body 1 moves relative to the backrest body F. It becomes difficult, and the displacement movement of the back cover G is suitably regulated.

  The front engagement portion 22 and the rear engagement portion 32 are hook-shaped that engage with the lower end portion of the backrest main body F. For this reason, the cover main body 1 can cover the backrest main body F widely, and the front engagement portion 22 and the rear engagement portion 32 having a hook shape are preferably associated with the lower end portion of the backrest main body F. It will fit.

  The cover body 1 is mainly composed of a stretchable material, and the front base member 2 has a plate-like base member body 21 and a front member provided at the lower part of the base member body 21. The rear base member 3 includes a base member main body 31 having a plate shape, and a rear engagement portion 32 provided at a lower portion of the base member main body 31. For this reason, by engaging the front engaging part 22 and the rear engaging part 32 with the backrest main body F, the cover main body 1 can be extended to a certain extent. Therefore, the cover main body 1 can be attached to the backrest main body F in a manner in which the occurrence of sagging and wrinkles is suppressed.

  The cover main body 1 includes an opening K through which the backrest main body F is inserted, and the opening K is configured to be openable and closable via a fastener j serving as a connecting means. For this reason, the opening K of the cover main body 1 can be suitably opened and closed by the fastener j.

  A positioning member 13 that extends in the left-right direction and engages with the upper end of the backrest main body F is provided on the inner surface of the upper end of the cover main body 1. For this reason, the cover main body 1 can be suitably positioned with respect to the backrest main body F.

  The backrest main body F includes an upper recessed portion a4 that is a recessed portion that is recessed upward in a front view at the center in the left-right direction at the lower end. And the front engaging part 22 and the rear engaging part 32 are engaged with the upper recessed part a4. For this reason, the cover main body 1 can be covered in a wide area of the backrest main body F.

  Left and right armrests E extending in the front-rear direction are integrally provided on the left and right sides of the backrest body F. The cover body 1 is mainly composed of a cloth which is a stretchable material. The base member main bodies 21 and 31 in the front and rear base members 2 and 3 extend outward from an imaginary line s connecting the base end portion of the armrest E and the side portion of the upper recessed portion a4, and the backrest main body. It is arranged along the outer surface of F, and is provided with a curl prevention part m1, m2. For this reason, the lower left and right portions of the cover main body 1 are preferably suppressed from being turned up against the backrest main body F.

  Each base member main body 21, 31 in the front and rear base members 2, 3 includes housing portions s 1, s 2 that can house a part of the fastener j. For this reason, not only the both ends of the fastener j can be suitably accommodated in the cover body 1, but also the swelled portions of the both ends of the fastener j, for example, the joining member of the slider j3 or the base end portion Due to the presence, it is possible to suitably suppress the protrusion from appearing on the outer surface of the cover body 1.

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

  The base member of the back cover may be any member as long as it is arranged on the inner surface side of the cover main body and is engaged with the cover main body, and is not limited to that shown in the above-described embodiment.

  Here, the back cover G which is other embodiment is demonstrated with reference to FIGS. In the other embodiment, the same or corresponding components as those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. Also. The illustration of other components other than the back cover G constituting the chair is omitted.

  The back cover G which is another embodiment has the front base member 2 accommodated in a front base member accommodating portion 11f formed in a bag shape in the cover main body 1, and the rear base member 3 is accommodated in the cover main body. 1 is accommodated in the base member accommodating portion 12f after being formed into a bag shape. The front base member 2 and the rear base member 3 are respectively arranged on the inner surface side of the cover body 1, and are engaged in such a manner that the cover body 1 can be moved or expanded in a predetermined direction. Yes.

  The front base member accommodating portion 11 f is provided in the front cover portion 11 in the cover main body 1. The front base member accommodating portion 11f has a bag shape for accommodating the front base member 2 so that the front engaging portion 22 of the front base member 2 can be exposed to the outside. That is, the front base member housing portion 11f includes a long hole-shaped opening k1 for exposing the front engaging portion 22 to the outside at the lower end portion. The front base member accommodating portion 11f is mainly composed of a front extension portion 11a and a sheet-like inner bag forming portion 11b arranged on the inner surface side of the front extension portion 11a. And the bag-shaped part which has the opening part k1 in a lower end part is formed by sewing the side edge part of these front extension parts 11a and the inner side bag formation part 11b, and the right and left both sides of a lower edge part. ing.

  The front base member 2 is inserted into the front base member housing portion 11f from above. Then, the downward movement of the previous base member 2 accommodated therein is restricted by the sewn portion n1 between the lower edge portion of the front extending portion 11a and the lower edge portion of the inner bag forming portion 11b. At the same time, movement in the left-right direction of the front base member 2 accommodated therein is restricted by the sewn portion n2 between the side edge portion of the front extending portion 11a and the side edge portion of the inner bag forming portion 11b. It is like that.

  If it is such, not only the intended purpose can be achieved, but also the front base member 2 can be simply inserted into the front base member accommodating portion 11f, and the front base member 2 can be attached to the cover body 1 It can be arranged at an appropriate position. That is, the front base member 2 and the cover main body 1 can be positioned without positively using a fastener.

  In addition, as shown in FIG. 17, the sewn part n1 of the lower edge part of the front extension part 11a and the lower edge part of the inner bag forming part 11b, and the side edge part and the inner side of the front extension part 11a The stitched portion n2 with the side edge portion of the bag forming portion 11b is provided at a position where it is difficult to expose on the surface side. Further, the end of the front extension portion 11a and the end of the inner bag forming portion 11b are sewn together so as to be located inside the front base member accommodating portion 11f.

  The rear base member housing portion 12 f is provided in the rear cover portion 12 in the cover body 1. The rear base member accommodating portion 12f has a bag shape for accommodating the rear base member 3 so that the rear engaging portion 32 of the rear base member 3 can be exposed to the outside. That is, the rear base member accommodating portion 12f includes a long hole-shaped opening k2 for exposing the rear engagement portion 32 to the outside at the lower end portion. The rear base member accommodating portion 12f is mainly composed of a rearward extension portion 12a and a sheet-like inner bag forming portion 12b disposed on the inner surface side of the rearward extension portion 12a. And the bag-shaped part which has the opening part k2 in a lower end part is formed by sewing up the side edge part of these extended parts 12a and the inner side bag formation part 12b, and the right and left both sides of a lower edge part. ing.

  The rear base member 3 is inserted into the rear base member housing portion 12f from above. Then, the downward movement of the base member 3 after being accommodated therein is restricted by the sewn portion n3 between the lower edge portion of the rear extension portion 12a and the lower edge portion of the inner bag forming portion 12b. At the same time, the movement of the base member 3 in the left-right direction after being accommodated therein is restricted by the sewn portion n4 between the side edge portion of the rear extension portion 12a and the side edge portion of the inner bag forming portion 12b. It is like that.

  If it is such, not only the intended purpose can be achieved, but also the rear base member 3 can be inserted into the rear base member accommodating portion 12f, and the rear base member 3 can be attached to the cover body 1 It can be arranged at an appropriate position. That is, the rear base member 3 and the cover body 1 can be positioned without positively using a fastener.

  In addition, as shown in FIG. 18, the sewn portion n3 between the lower edge portion of the rear extension portion 12a and the lower edge portion of the inner bag forming portion 12b, and the side edge portion and the inner side of the rear extension portion 12a The sewn portion n4 with the side edge portion of the bag forming portion 12b is provided at a position where it is difficult to expose on the front surface side. Further, the end of the rear extension portion 12a and the end of the inner bag forming portion 12b are stitched together so as to be located inside the rear base member accommodating portion 12f.

  In the other embodiments described above, it goes without saying that the cover main body 1 and the front and rear base members 2 and 3 may be positioned using a fastener.

  In the embodiment described above, the base members are provided on the front and rear sides of the back cover, respectively, but the base members may be provided on only one of the front and rear sides.

  The engaging part of the base member may be anything that can engage with the lower part of the backrest body, and is not necessarily limited to the one that engages with the lower end part of the backrest body.

  The cover body only needs to be mainly composed of an elastic sheet-like material, and is not limited to a cloth-made material as shown in the above-described embodiment.

  It goes without saying that various forms of the support frame and the seat can be adopted.

  The shape of the backrest body and the shape of the back cover can be appropriately changed without departing from the spirit of the present invention.

  Various shapes can be adopted as the shape of the engaging portion of the base member.

  The connecting means is not limited to a fastener, and any means can be used as long as it can open and close the opening. The connection means may be, for example, a button type, a snap button type, or the like, or may use a hook-and-loop fastener.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Cover main body 2 ... Previous base member (base member)
3 ... Later base member (base member)
22: Front engagement part (engagement part)
32 ... Rear engagement part (engagement part)
A ... Chair D ... Backrest F ... Backrest body G ... Back cover

Claims (9)

A chair comprising a backrest having a backrest and a back cover for covering the backrest,
The back cover includes a cover body having a bag-like portion covering the backrest body, and a base member disposed on the inner surface side of the cover body and engaged with the cover body.
The chair provided with the engaging part which the said base member engages with the lower part of the said backrest main body. The chair according to claim 1, wherein the engaging portion has a hook shape that engages with a lower portion of the backrest main body. The cover body is mainly composed of a stretchable material,
The chair according to claim 1 or 2, wherein the base member includes a plate-like base member main body and the engaging portion provided at a lower portion of the base member main body. The chair according to claim 1, 2, or 3, further comprising a positioning member that extends in a left-right direction and engages with an upper end portion of the backrest main body on an inner surface of an upper end portion of the cover main body. The backrest main body includes a recessed portion that is recessed upward in a front view at a central portion in a left-right direction at a lower edge, and the engaging portion is engaged with the recessed portion. 4. The chair according to 4. Left and right armrests extending in the front-rear direction are provided on the left and right sides of the backrest body,
The cover body is mainly composed of a stretchable material,
The base member includes a base member main body having a plate shape, and the engaging portion provided at a lower portion of the base member main body,
The base member main body extends outward from a virtual line connecting the base end portion of the armrest and the side portion of the recessed portion, and is arranged so as to be along the outer surface of the backrest main body. The chair according to claim 5, wherein the chair is provided. The cover body is provided with an opening through which the backrest body is inserted, and the opening is configured to be openable and closable via connection means,
The base member includes a base member main body having a plate shape, and the engaging portion provided at a lower portion of the base member main body,
The chair according to claim 1, 2, 3, 4, 5 or 6, wherein the base member main body includes a housing portion capable of housing a part of the connection means. The said cover main body comprises the base member accommodating part which comprised the bag shape which accommodates the said base member, and had the opening part which can expose the said engaging part to the exterior. , 6 or 7 chair. The base member is a base member before being arranged on the front side in the cover body, and a base member after being arranged on the rear side in the cover body,
The said engaging part of the said front base member and the said engaging part of the said back base member are provided in the position which does not interfere, The Claims 1, 2, 3, 4, 5, 6, 7 or 8 Chairs.

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