JP6935209B2 - Upholstery structure and chair - Google Patents

Description

The present invention relates to an upholstery structure of an upholstery material and a chair.

Conventionally, there has been known a seat body or a backrest in which a tension material formed in a mesh shape or the like is stretched on a frame body such as a back frame or a seat frame of a chair. The edge portion of the upholstery member is inserted and attached to a groove portion formed so as to open in the outer peripheral direction on the outer edge of the frame body.

For example, as described in Patent Document 1, a locking plate provided at the edge of the upholstery material is inserted into the groove of the frame at an angle with respect to the opening direction in which the groove opens, and a step in the groove is inserted. Those that are locked to the part have been proposed.

Further, it is also known that an annular edge material is provided along the edge portion of the upholstery member, and protrusions formed at the end portion of the edge member are locked in the groove portion of the frame body. By forming a notch around the protrusion, the protrusion is easily elastically deformed in the direction of being locked in the groove.

Japanese Patent No. 5484873

However, in the configuration described in Patent Document 1 above, when the load (tension) from the seater acting on the tension material is released, the locking plate provided at the end of the tension material rotates in the groove. Therefore, the locking plate may come off from the groove of the holding member such as the frame body.

Further, in the configuration in which the protrusion is formed on the edge portion provided on the upholstery material, the edge between the other portion of the edge material and the protrusion is cut by the notch formed around the protrusion. As a result, the moment in the direction of falling from the groove due to the tension of the tension material acts intensively on the base of the protrusion. Since the width of the protrusion formation site is narrowed by the notch, it cannot withstand the moment in the falling direction. In addition, accompanying this, damage to the base of the protrusion occurs, which may damage the edge material itself and cause the edge material to fall off. Therefore, it is conceivable to set the size of the edge material to a thickness equal to the thickness of the groove portion. As a result, it is possible to set the dimensions so that the protrusion is maintained in a state of being caught by the step portion even when the formation portion of the protrusion is about to return to the initial position. In such a case, the means for integrating the upholstery material with the thick edge material is limited.

The present invention has been made in view of the above circumstances, and provides an upholstery structure and a chair of a upholstery material in which an edge material provided with an upholstery material is securely attached to the holding member and is hard to come off from the holding member. Is.

In order to achieve the above object, the present invention employs the following means.
That is, the upholstery structure of the upholstery material according to the present invention includes a upholstery material that receives a load, an edge material provided at the edge of the upholstery material, and a holding member that holds the edge material. The member has an insertion groove portion into which the edge member is inserted and an engaging portion formed in the insertion groove portion and engaging the edge member, and the edge member is connected to the edge portion of the upholstery member. On the surface opposite to the surface on which the protrusion protrudes from the base, the protrusion in one direction intersecting the direction in which the insertion groove opens, and the surface opposite to the protrusion. the location, have a, a recess formed as depressed in the one direction, the recess, it is inclined so as to gradually recessed in the one direction toward the inner edge from the outer edge side of the base It is a feature characterized by.
Further, the upholstery structure of the upholstery material according to the present invention includes a upholstery material that receives a load, an edge material provided at the edge of the upholstery material, and a holding member that holds the edge material, and holds the upholstery material. The member has an insertion groove portion into which the rim material is inserted and an engaging portion formed in the insertion groove portion to engage the rim material, and the rim material is connected to the edge portion of the upholstery material. On the surface opposite to the surface on which the protrusion protrudes from the base, the protrusion in one direction intersecting the direction in which the insertion groove opens from the base, and the side opposite to the protrusion. At the position of, there is a recess formed so as to be recessed in one direction, and the recess is laterally arranged on both sides of the central inclined surface and the edge material in the longitudinal direction on the central inclined surface. It has an inclined surface, and the longitudinal end portion of the edge member on the laterally inclined surface is continuous with the opposite surface on the base portion.

In the upholstery structure of the upholstery material configured in this way, when the edge material provided at the edge portion of the upholstery material is inserted into the insertion groove portion, the protruding portion is formed on the wall portion on the one-way side of the insertion groove portion. Contact. Then, the protruding portion receives a force from the wall portion on the unidirectional side of the insertion groove portion in the direction opposite to the one direction. A recess is formed on the surface of the base opposite to the projecting surface so as to be recessed in one direction, and the thickness of the base is reduced. Therefore, due to the force acting on the protruding portion in the opposite direction, the concave portion of the base portion is inserted while being elastically deformed so as to bulge in the opposite direction. Then, when the insertion into the insertion groove is completed, the edge material returns to its original shape, the protruding portion is engaged with the engaging portion formed in the insertion groove portion, and the edge material provided with the tension material is held. It can be securely attached to the member.
Further, even if a force acts on the edge material in the direction in which the insertion groove is opened while the edge material is attached to the holding member, no slit is formed around the protruding portion of the edge material. , The protruding portion is unlikely to be elastically deformed in the direction away from the insertion groove portion. Therefore, the edge material does not come off from the insertion groove portion of the holding member.

Further, in the upholstery structure of the upholstery material according to the present invention, it is preferable that the recess is formed so that the depth gradually becomes deeper toward the position opposite to the protruding portion.

In the tensioning structure of the tension material configured in this way, the protruding portion is provided on the opposite side of the deepest position in the recess, so that if the protruding portion abuts on the wall portion on the one-way side of the insertion groove portion, , The recess bulges greatly in the opposite direction. Therefore, when the edge member is inserted into the insertion groove portion, it can be inserted more smoothly without requiring a large force. Further, since the concave portion is formed so as to gradually increase in depth, it is possible to suppress the local force acting on the concave portion when the concave portion is elastically deformed.

Further, in the upholstery structure of the upholstery material according to the present invention, the edge material may have a reinforcing portion that protrudes in one direction from the base portion and supports the base end of the protruding portion.

In the stretched structure of the stretched lumber configured in this way, the base portion of the edge member is provided with a reinforcing portion that protrudes in one direction and supports the base end of the protruding portion. Therefore, since the protruding portion is reinforced by the reinforcing portion, the protruding portion is not broken or damaged when the protruding portion is inserted into the insertion groove portion of the holding member and elastically deformed.

Further, in the upholstery structure of the upholstery material according to the present invention, the reinforcing portion may be a rib continuous in the longitudinal direction of the edge material.

In the upholstery structure of the upholstery member configured in this way, the protruding portion is reinforced by ribs continuous in the longitudinal direction of the edge member. Therefore, when the protruding portion is inserted into the insertion groove portion of the holding member and elastically deformed, the protruding portion is further suppressed from being broken or damaged, and the reinforcing portion itself is also broken or damaged. No.

Further, in the upholstery structure of the upholstery material according to the present invention, even if the insertion groove portion is formed so that the groove width gradually decreases from the opening side to the inner side opposite to the entrance side. good.

In the tensioning structure of the tension material configured in this way, the insertion groove portion is formed so that the groove width gradually decreases from the inlet side to the back side, so that when the edge material is inserted into the insertion groove portion, the insertion groove portion is formed. If the rim material is inserted along the wall portion forming the insertion groove portion, the rim material comes into contact with the wall portion and is easily elastically deformed by gradually receiving a force from the wall portion with the insertion. Therefore, the edge material can be easily inserted into the insertion groove portion without a large force.

Further, the chair according to the present invention is characterized in that the holding member in the upholstery structure of the upholstery material according to any one of the above is provided as a back frame or a seat frame.

In the chair configured in this way, since the holding member in the upholstery structure of the upholstery according to any one of the above is provided as the back frame or the seat frame, the edge material provided with the upholstery is surely attached to the holding member. It can be attached and does not easily come off from the holding member.

According to the upholstery structure and the chair of the upholstery material according to the present invention, the edge material provided with the upholstery material is surely attached to the holding member and is hard to come off from the holding member.

It is a perspective view which looked at the chair which concerns on one Embodiment of this invention from the side. It is a perspective view which looked at the seat frame of the chair which concerns on one Embodiment of this invention from above. It is a top view of the seat edge material of the chair which concerns on one Embodiment of this invention. It is a perspective view which looked at a part of the seat edge material of the chair which concerns on one Embodiment of this invention from above. It is a perspective view which looked at a part of the seat edge material of the chair which concerns on one Embodiment of this invention from the bottom. It is sectional drawing which shows the stretch structure of the tension material in the seat body of the chair which concerns on one Embodiment of this invention. FIG. 6 is a cross-sectional view taken along the line AA of FIG. It is sectional drawing which shows the step before inserting the seat part tensioning member into the mounting groove of a seat frame in the chair which concerns on one Embodiment of this invention. FIG. 8 is a cross-sectional view taken along the line BB of FIG. It is sectional drawing which shows the stage which started to insert the seat part tensioning member into the mounting groove of a seat frame in the chair which concerns on one Embodiment of this invention. FIG. 10 is a cross-sectional view taken along the line CC of FIG. It is sectional drawing which shows the next step of the step shown in FIG. 10 by inserting a seat tensioning member into a mounting groove of a seat frame in the chair which concerns on one Embodiment of this invention. It is a perspective view which looked at the back front frame of the chair which concerns on one Embodiment of this invention from the front. It is a perspective view which looked at a part of the seat edge material of the chair which concerns on modification 1 of one Embodiment of this invention from above. It is a perspective view which looked at a part of the seat edge material of the chair which concerns on the modification 2 of one Embodiment of this invention from above. It is a perspective view which looked at a part of the seat edge material of the chair which concerns on the modification 3 of one Embodiment of this invention from above. It is a perspective view which looked at a part of the seat edge material of the chair which concerns on the modification 4 of one Embodiment of this invention from above.

Hereinafter, the chair according to the embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a chair according to an embodiment of the present invention as viewed from the side.
As shown in FIG. 1, the chair 100 is attached to the leg 1 installed on the floor surface F, the box-shaped support 2 installed on the upper part of the leg 1, and the upper part of the support 2. A seat support member 3, a seat body 4 that is slidably supported by the seat support member 3 and can be seated by a seater, and a backrest 8 that extends from a support base 2 and can support the back of a seater who is seated on the seat body 4. And have.

In the following description, for convenience, the direction in which the seated person seated on the seat 4 faces forward is referred to as "forward", and the opposite direction is referred to as "rear". Further, the direction connecting the floor surface F side on which the chair 100 is installed and the opposite side thereof is referred to as "vertical direction". Further, the width direction of the chair 100, that is, the horizontal direction orthogonal to the front-rear direction is referred to as "left-right direction". Further, in the figure, the front is indicated by an arrow FR, the upper part is indicated by an arrow UP, and the left side is indicated by an arrow LH.

The leg portion 1 has a multi-leg 11 with casters 11a and a pedestal 12 that stands up from the center of the multi-leg 11 and incorporates a gas spring (not shown) which is an elevating mechanism.

The outer cylinder 13 forming the lower part of the pedestal 12 is non-rotatably fitted and supported by the multi-legged legs 11. The inner cylinder 14 constituting the upper portion of the pedestal 12 is supported by fixing the support base 2 to the upper end portion, and the lower portion is rotatably supported by the outer cylinder 13 in the horizontal direction.

The support base 2 has a built-in elevating adjustment mechanism (not shown) for the pedestal 12 and a tilt adjusting mechanism (not shown) for the backrest 8.

The seat receiving member 3 has four link arms (not shown) attached to the upper portion of the support base 2 and a pair of left and right fixed frames (not shown) that connect the link arms to each other.

The seat body 4 has a seat frame (holding member) 40 supported by the seat receiving member 3 and a seat portion stretching member 60 stretched on the seat frame 40. The upper surface of the seat tensioning member 60 is a seat load supporting surface 71a that receives the load of the seated person.

FIG. 2 is a perspective view of the seat frame 40 as viewed from above.
As shown in FIG. 2, the seat frame 40 has a seat frame 41 supported by a fixed frame and a seat frame 50 fixed to the upper surface of the seat frame 41. The lower frame 41 and the upper frame 50 are each formed in an annular shape and are integrally formed with each other.

The seat frame 41 has a first seat reinforcing rod 42 slidably provided on each of the pair of fixed frames, and a second seat reinforcing rod 43 connecting both ends of the first seat reinforcing rod 42. ing. The first seat reinforcing rod 42 and the second seat reinforcing rod 43 are integrally formed of, for example, resin or the like, and have a predetermined strength. The first seat reinforcing rod 42 extends along the front-rear direction. The second seat reinforcing rod 43 extends along the left-right direction.

The seat frame 50 has a pair of vertical rods 51 arranged apart from each other in the left-right direction, and a horizontal rod 52 that connects both ends of the vertical rods 51. The vertical rod 51 and the horizontal rod 52 are integrally formed of, for example, resin or the like, and are configured to be elastically deformable according to the force acting on the seat tensioning member 60 (see FIG. 1; the same applies hereinafter).

The vertical rod 51 extends along the front-rear direction. The horizontal rod 52 extends along the left-right direction. A reinforcing plate portion 53 extending in a plate shape along a horizontal plane is provided on the inner edge of the horizontal rod 52 on the front side. An elastic cushion body (not shown; the same applies hereinafter) can be placed on the upper surface of the reinforcing plate portion 53.

A mounting groove (insertion groove portion) 55 recessed inward (inner edge side) is formed on the outer edges of the vertical rod 51 and the horizontal rod 88. The end of the seat tensioning member 60 (see FIG. 1), which will be described later, is inserted into and engaged with the mounting groove 55.

As shown in FIG. 1, the seat extension member 60 includes a seat edge material (edge material) 61 formed in a substantially annular shape, a seat tension material (extension material) 71 stretched on the seat edge material 61, and the like. have.

FIG. 3 is a plan view of the seating edge member 61.
As shown in FIG. 3, the seating edge member 61 is configured by arranging a pair of semi-annular members 61a, which are halved in an annular shape, with a slight interval. The pair of semi-annular members 61a are formed symmetrically with each other.

FIG. 4 is a perspective view of a part of the seating edge member 61 as viewed from above. FIG. 5 is a perspective view of a part of the seating edge member 61 as viewed from below.
As shown in FIGS. 4 and 5, the seat edge member 61 has a flat plate portion (base portion) 62 extending along the outer edge of the seat body 4 and ribs bent downward from the end portion on the inner edge side of the flat plate portion 62. It has a (reinforcing portion) 64 and a plurality of retaining protrusions (protruding portions) 66 provided on the rib 64.

As shown in FIG. 3, the corner portion of the flat plate portion 62 is formed in a curved shape, and cuts 62a and 62b are formed in the outer edge portion and the inner edge portion, respectively. The notch 62a at the outer edge is larger than the notch 62b at the inner edge.

FIG. 6 is a cross-sectional view showing the upholstery structure of the upholstery material in the seat body 4. FIG. 7 is a cross-sectional view taken along the line AA of FIG.
As shown in FIGS. 4 and 6, the flat plate portion 62 has an upper surface 62u arranged along a substantially horizontal plane. Wide recesses (recesses) 63 that are recessed downward (in one direction) are formed at a plurality of locations on the upper surface (the surface opposite to one direction) 62u.

As shown in FIG. 3, the wide recess 63 is formed so that the depth gradually increases toward the position opposite to the retaining protrusion 66 on the upper surface 62u of the flat plate portion 62. In the present embodiment, the wide recesses 63 are formed at three locations on each of the left and right sides. The wide recess 63 is a laterally inclined surface 63a arranged on both sides of the central inclined surface 63a and the central inclined surface 63a arranged in the center in the concave width direction with the extending direction of the seating edge member 61 as the concave width direction. It is formed.

As shown in FIG. 4, the central inclined surface 63a is gradually inclined downward from the outer edge side to the inner edge side of the flat plate portion 62. The outer edge side end of the central inclined surface 63a is continuous with the upper surface 62u of the flat plate portion 62.

The laterally inclined surface 63b is gradually inclined downward from the outer edge side toward the inner edge side, and is gradually inclined downward toward the central inclined surface 63a side. The outer edge side end of the laterally inclined surface 63b is continuous with the upper surface 62u of the flat plate portion 62. The lateral end of the laterally inclined surface 63b in the width direction of the recess is continuous with the upper surface 62u of the flat surface portion 62.

As shown in FIGS. 4 and 5, the ribs 64 are continuously provided in the extending direction (longitudinal direction) of the flat plate portion 62. In the present embodiment, the rib 64 is provided at the broken line portion shown in FIG.

As shown in FIGS. 4 and 5, the retaining protrusion 66 is provided on the lower surface 62b of the flat plate portion 62 at a position opposite to the deepest position of the wide recess 63. The retaining protrusion 66 has a base end portion (base end) 67 extending downward from the lower surface 62b (specifically, the central inclined surface 63a) of the flat plate portion 62, and the inner edge side of the flat plate portion 62 from the lower end of the base end portion 67. It has a protrusion 68, which is bent into a. In the present embodiment, the retaining protrusions 66 are provided on the flat plate portion 62 at three locations on each of the left and right sides.

The base end portion 67 is arranged along the outer surface of the rib 64 (the surface on the outer edge side of the flat plate portion 62). The protrusion 68 is arranged along the lower surface of the rib 64. The base end portion 67 is supported by the rib 64. The tip surface 68f of the protrusion 68 is arranged on the same plane as the inner surface (the surface on the inner edge side of the flat plate portion 62) 64f of the rib 64.

As shown in FIG. 1, the edge portion of the upholstery member 71 is joined to the flat plate portion 62 (see FIG. 6) of the seat edge member 61 by applying an adhesive, suturing, or the like.

Next, the upholstery structure of the upholstery member 71 in the seat body 4 will be described.
As shown in FIGS. 6 and 7, the seat frame 40 is formed with a downward hole 46 that is recessed downward from the upper surface at a position where the retaining protrusion 66 of the seat edge member 61 is arranged. The downward hole 46 communicates with the mounting groove 55. The bottom of the downward hole 46 is arranged below the lower surface 55b forming the mounting groove 55. In other words, the lower portion of the downward hole 46 is a groove recess (engagement portion) 47 that is recessed below the lower surface 55b of the mounting groove 55.

The mounting groove 55 has a tapered shape in which the groove width (height in the vertical direction) on the entrance 55a side (outer edge side) is shorter than the groove width on the back 55z side (inner edge side).

The vicinity of the end portion of the seat tension member 71 stretched on the seat edge member 61 is arranged along the upper surface 40a and the side end surface 40b of the seat frame 40, and is involved in the mounting groove 55 in the engaging direction. The end portion of the seating member 71 is joined along the lower surface 62b of the flat plate portion 62 of the seat frame 40.

The retaining protrusion 66 of the seat edge member 61 is engaged in the groove recess 47. As a result, the retaining protrusion 66 is restricted from moving in the opening direction of the groove recess 47. Further, in a state where tension is applied to the seating member 71, the retaining protrusion 66 is in a direction in which the tip thereof is brought close to one side wall 47a forming the groove recess 47 from the state shown in FIG. 6 (hereinafter, referred to as a tension direction). ) Slightly rotates. In other words, the outer edge side of the flat plate portion 62 is slightly rotated so as to be close to the upper surface 55u on the mounting groove 55 side. When the tension is released, it rotates in the direction opposite to the tension direction from the state shown in FIG. 6 or the state shown in FIG. At this time, when the flat plate portion 62 is rotated to the maximum, the upper surface 62u of the flat plate portion 62 abuts on the upper surface 55u of the mounting groove 55 to restrict the rotation, and the retaining protrusion 66 is formed from the groove recess 47, that is, the mounting groove 55. It will not come off.

Next, the operation of attaching the seat extension member 60 to the seat frame 40 will be described.
FIG. 8 is a cross-sectional view showing a stage before inserting the seat portion tensioning member 60 into the mounting groove 55 of the seat frame 40. FIG. 9 is a cross-sectional view taken along the line BB of FIG. FIG. 10 is a cross-sectional view showing a stage in which the seat portion tensioning member 60 is started to be inserted into the mounting groove 55 of the seat frame 40. FIG. 11 is a cross-sectional view taken along the line CC of FIG. FIG. 12 is a cross-sectional view showing the next step of the step shown in FIG. 10 by inserting the seat extension member 60 into the mounting groove 55 of the seat frame 40.
As shown in FIGS. 8 and 9, before the seating edge member 61 is inserted into the mounting groove 55, the seating edge member 61 is not deformed, and the upper surface 62u of the flat plate portion 62 is in a state along a substantially horizontal plane. be.

From this state, when the inner edge side of the seat edge member 61 is inserted into the mounting groove 55 of the seat frame 40, the lower surface 66b of the retaining protrusion 66 of the seat edge member 61 comes into contact with the lower surface 55b of the mounting groove 55. When the seat edge material 61 is further inserted into the mounting groove 55, as shown in FIGS. 10 and 11, the lower surface 66b of the retaining protrusion 66 of the seat edge material 61 comes into contact with the lower surface 55b of the mounting groove 55, and the seat edge material 61 A force acts upward on the inner edge side of 61. At the position of the wide recess 63 of the seat edge member 61, the thickness of the seat edge member 61 is thin by the depth of the wide recess 63, and the seat edge member 61 is easily elastically deformed. The stop protrusion 66 is lifted.

Since the lateral end of the laterally inclined surface 63b in the width direction of the recess is continuous with the upper surface 62u of the flat surface portion 62, the laterally inclined surface 63b is formed at a right angle to the upper surface 62u, etc. Easy to elastically deform.

Further, since the central inclined surface 63a has a length along the longitudinal direction of the groove recess 47 (in the extending direction of the seat edge member 61), the central inclined surface 63a is linked to the elastic displacement of the retaining protrusion 66 upward. 63a is likely to be elastically displaced upward.

The mounting groove 55 has a tapered shape in which the groove width (height in the vertical direction) on the entrance 55a side (outer edge side) is larger than the groove width on the back 55z side (inner edge side). As a result, as the seating edge member 61 is inserted into the back 55z side of the mounting groove 55, the wide recess 63 of the seating edge member 61 is largely displaced upward, so that it is easy to insert. The tip of the retaining protrusion 66 moves along the lower surface 55b of the mounting groove 55, and the upper end moves along the upper surface 55u of the mounting groove 55.

When the seat edge member 61 is further inserted into the mounting groove 55, as shown in FIG. 12, a part of the retaining protrusion 66 is arranged in the downward hole 46, and as shown in FIGS. 6 and 7, the retaining protrusion 66 is further inserted. When the 66 is completely placed in the downward hole 46, the wide recess 63 of the seating edge member 61 is elastically deformed so as to return to its original position, the wide recess 63 is displaced downward, and the retaining protrusion 66 is grooved. It is fitted in the recess 47. In this way, the seat extension member 60 is attached to the seat frame 40.

As shown in FIG. 1, the backrest 8 has a back frame (holding member) 80 connected to the support base 2 and a back stretching member 90 stretched on the back frame 80. The front surface of the back tensioning member 90 is a back load supporting surface 96f that receives the load of the seated person.

The back frame 80 has a back frame 81 which is connected to the support base 2 and is a strength member which bears the strength of the back frame 80, and a back front frame 86 provided in front of the back frame 81.

The back frame 81 has a lower side portion 82, a side side portion 83, and an upper side portion 84. The lower side portion 82, the side side portion 83, and the upper side portion 84 are integrally formed of, for example, a metal such as aluminum or a resin having a predetermined strength.

The lower side portion 82 is connected to a tilt adjusting mechanism (not shown) in the support base 2 and extends from both left and right sides of the rear portion of the support base 2. The lower side portion 82 is gradually inclined rearward as it goes upward. Further, each lower side portion 82 is provided with an armrest 89 arranged on the side of the seat body 4.

A side side portion 83 is continuously formed at the upper end portion of each lower side portion 82. Each side side portion 83 is gradually inclined outward in the left-right direction as it goes upward.

The lower portion of the side portion 83 is gradually inclined forward as it goes upward. The upper part of the side side portion 83 gradually inclines toward the rear as it goes upward. The upper portions of the side portions 83 are connected by the upper side portions 84.

FIG. 13 is a perspective view of the back front frame 86 as viewed from the front.
As shown in FIG. 13, the back front frame 86 has a pair of vertical rods 87 arranged apart from each other in the left-right direction, and a horizontal rod 88 connecting both ends of the vertical rods 87. The vertical rod 87 and the horizontal rod 88 are integrally formed of, for example, resin or the like, and are configured to be elastically deformable according to the force acting on the back tensioning member 90 (see FIG. 1; the same applies hereinafter).

The vertical rod 87 extends along the vertical direction. The horizontal rod 88 extends along the left-right direction. An upper connecting portion 87a and a lower connecting portion 87b extending rearward are integrally formed on the upper portion and the lower portion of the vertical rod 87, respectively. The tip portions of the upper connecting portion 87a and the lower connecting portion 87b are connected to the side side portion 83 (see FIG. 1) of the back frame 81.

A mounting groove 55 recessed inward (inner edge side) is formed on the outer edges of the vertical rod 87 and the horizontal rod 88. The end portion of the back tensioning member 90, which will be described later, is inserted into and engaged with the mounting groove 55.

As shown in FIG. 1, the back upholstery member 90 includes a back edge material (edge material) 91 formed in a substantially annular shape and a back upholstery material (upholstery material) 96 stretched on the back edge material 91. Have.

Similar to the seat body 4, the backrest 8 is provided with a stretched structure of the backing member 96.
Explaining with reference to FIG. 6, the back frame 80 is provided with a groove recess 47 recessed rearward. In the back edge member 91, the flat plate portion 62 is arranged in the front, and the rib 64 and the retaining protrusion 66 project rearward. The retaining protrusion 66 of the back edge material 91 is engaged with the groove recess 47 of the back frame 80. The vicinity of the end portion of the back tension member 96 stretched on the back edge member 91 is arranged along the front surface and the side end surfaces of the back frame 80, and is involved in the direction of engaging with the mounting groove 55.

In the chair 100 configured in this way, when the seat edge member 61 and the back edge member 91 are inserted into the mounting groove 55, the retaining protrusion 66 comes into contact with the surface 55b of the mounting groove 55. Then, the retaining protrusion 66 receives a force from the surface 55b of the mounting groove 55. A wide recess 63 is formed on the surface 62u of the flat plate portion 62 so as to be recessed on the surface 62b side, and the thickness of the flat plate portion 62 is reduced. Therefore, due to the force acting on the retaining protrusion 66, the wide recess 63 of the flat plate portion 62 is inserted while being elastically deformed so as to bulge in the opposite direction. Then, when the insertion into the mounting groove 55 is completed, the seat edge member 61 and the back edge member 91 return to their original shapes, and the retaining protrusion 66 is engaged with the groove recess 47 of the mounting groove 55 to seat the seat. The seat edge material 61 and the back edge material 91 provided with the material 71 and the back tension material 96 are securely attached to the seat frame 40 and the back frame 80.

Further, in a state where the seat edge material 61 and the back edge material 91 are attached to the seat frame 40 and the back frame 80, a force acts on the seat edge material 61 and the back edge material 91 toward the opening of the mounting groove 55. However, no slit is formed around the retaining protrusion 66 of the seat edge member 61 and the back edge member 91, and the retaining protrusion 66 is unlikely to be elastically deformed in the direction of being disengaged from the mounting groove 55. Therefore, the seat edge member 61 and the back edge member 91 do not come off from the mounting grooves 55 of the seat frame 40 and the back frame 80.

Further, the retaining protrusion 66 is provided on the lower surface 62b of the flat plate portion 62 at a position opposite to the deepest position of the wide recess 63. Therefore, when the retaining protrusion 66 comes into contact with the surface 55b of the mounting groove 55, the wide recess 63 greatly swells in the opposite direction. Therefore, when the seat edge member 61 and the back edge member 91 are inserted into the mounting groove 55, they can be inserted more smoothly without requiring a large force. Further, since the wide recess 63 is formed so as to gradually become deeper, it is possible to suppress the local force acting on the wide recess 63 when the wide recess 63 is elastically deformed.

Further, the flat plate portion 62 is provided with a rib 64 that supports the base end portion 67 of the retaining protrusion 66. Therefore, since the retaining protrusion 66 is reinforced by the rib 64, the retaining protrusion 66 is broken or damaged when the retaining protrusion 66 is inserted into the mounting groove 55 of the seat frame 40 and the back frame 80 and elastically deformed. There is nothing to do.

Further, the retaining protrusion 66 is reinforced by ribs 64 that are continuous in the longitudinal direction of the seat edge member 61. Therefore, when the retaining protrusion 66 is inserted into the mounting groove 55 of the seat frame 40 and the back frame 80 and elastically deformed, the retaining protrusion 66 is further suppressed from being broken or damaged, and the rib 64 itself. Will not break or be damaged.

Further, since the mounting groove 55 is formed so that the groove width gradually decreases from the inlet side toward the back 55z side, when the seat edge member 61 and the back edge member 91 are inserted into the mounting groove 55, the groove width is gradually reduced. If the seat edge material 61 and the back edge material 91 are inserted along the surface 55b forming the mounting groove 55, the seat edge material 61 and the back edge material 91 come into contact with the surface 55b and receive a force from the surface 55b to be elastically deformed. do. Therefore, the seat edge member 61 and the back edge member 91 can be easily inserted into the mounting groove 55 without a large force.

(Modification example 1)
A modification 1 of the embodiment shown above mainly described with reference to FIG. 14.
In the following modification, the same members as those used in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.
As shown in FIG. 14 , in this modification, the wide recess 63A is formed by the curved surface 63c. The curved surface 63c is gradually inclined downward from the outer edge side to the inner edge side of the flat plate portion 62. Further, the end portion on the outer edge side of the curved surface 63c and the end portion on the side in the width direction of the recess are continuous with the upper surface 62u of the flat plate portion 62. Curved surface 63c is in accordance with heading toward the center of the recess width direction are formed so as depth increases to the next second. In the curved surface 63c, the inner edge side of the edge 62d of the flat plate portion 62, as depth increases to the next first follow toward the center side of the recess width direction, and is formed by a curve that is recessed downward. On the curved surface 63c, the side 62e on the outer edge side of the flat plate portion 62 is formed by a straight line.

The retaining protrusion 66 is provided on the lower surface 62b of the flat plate portion 62 at a position opposite to the deepest position of the wide recess 63A.

In this modification, since the curved surface 63c is formed by a smoothly continuous surface, when the seat edge member 61A is inserted into the mounting groove 55, it is elastically deformed by the force acting on the retaining protrusion 66. Cheap.

(Modification 2)
Modification 2 of the embodiment shown in the mainly be described with reference to FIG.
As shown in FIG. 15 , in this modification, the wide recess 63B is formed by a central inclined surface 63d arranged adjacent to the center in the concave width direction and a lateral inclined surface 63e arranged sideways to the central inclined surface 63d. Has been done.

The central inclined surface 63d is gradually inclined downward from the outer edge side to the inner edge side of the flat plate portion 62. The outer edge side end of the central inclined surface 63d is continuous with the upper surface 62u of the flat plate portion 62.

The laterally inclined surface 63e is gradually inclined downward from the outer edge side toward the inner edge side, and is gradually inclined downward toward the central inclined surface 63a side. The outer edge side end of the laterally inclined surface 63b is continuous with the upper surface 62u of the flat plate portion 62. The lateral end of the laterally inclined surface 63b in the concave width direction is continuous with the upper surface 62u of the flat surface portion 62.

The retaining protrusion 66 is provided on the lower surface 62b of the flat plate portion 62 at a position opposite to the deepest position of the wide recess 63A. Specifically, a boundary line 63f is formed between the adjacent central inclined surfaces 63d, and the retaining protrusion 66 is provided on the lower surface 62b of the flat plate portion 62 at a position opposite to the boundary line 63f.

In this modification, since the retaining protrusion 66 is provided on the lower surface 62b of the flat plate portion 62 at a position opposite to the boundary line 63f between the central inclined surfaces 63d, the mounting groove 55 opens in the seat edge member 61B. Even if a force is applied in the direction, the retaining protrusion 66 is unlikely to be elastically deformed in the direction away from the mounting groove 55.

(Modification example 3)
Modification 3 of the embodiment shown above mainly described with reference to FIG. 16.
As shown in FIG. 16 , the wide recess 63C is formed by a right-angled surface 63g, a curved corner surface 63h, and a wide surface 63i.

The right-angled surface 63g is bent at a right angle from the upper surface 62u of the flat plate portion 62. The outer edge side end of the right-angled surface 63 g is continuous with the upper surface 62u of the flat plate portion 62.

The wide surface 63i is gradually inclined downward from the outer edge side to the inner edge side of the flat plate portion 62. Further, the end portion of the wide surface 63i on the outer edge side is continuous with the upper surface 62u of the flat plate portion 62. The wide surface 63i is formed so that the depth gradually increases toward the center side in the width direction of the recess.

The curved corner surface 63h is a corner portion connecting the end portion of the right-angled surface 63g and the end portion of the wide surface 63i, and has a shape of being recessed laterally in the width direction of the recess.

In this modification, when the seat edge member 61C is inserted into the mounting groove 55, the concave curved corner surface 63h rises due to the force acting on the retaining protrusion 66, and the wide surface 63i is easily elastically deformed.

(Modification example 4)
For the fourth modification of the embodiment shown in the mainly be described with reference to FIG.
As shown in FIG. 17 , the wide recess 63D is formed by a right-angled surface 63k and a wide surface 63m.

The right-angled surface 63k is bent at a right angle from the upper surface 62u of the flat plate portion 62. The outer edge side end of the right-angled surface 63k is continuous with the upper surface 62u of the flat plate portion 62.

The wide surface 63 m gradually inclines downward from the outer edge side to the inner edge side of the flat plate portion 62. Further, the end portion of the wide surface 63i on the outer edge side is continuous with the upper surface 62u of the flat plate portion 62.

In this modification, even if a force acts on the seat edge member 61B in the direction in which the mounting groove 55 opens, it is difficult to deform in the direction in which the intersection (corner) of the right-angled surface 63k and the wide surface 63m rises. Elastic deformation of the retaining protrusion 66 in the direction of disengagement from the mounting groove 55 is greatly suppressed.

Further, the various shapes and combinations of the constituent members shown in the above-described embodiment are examples, and can be variously changed based on design requirements and the like without departing from the gist of the present invention.

For example, in the embodiment shown above, the mounting groove 55 is formed in a tapered shape, but the present invention is not limited to this. It is easier to insert the edge material into the insertion groove when it is formed in a tapered shape, but it does not have to be formed in a tapered shape.

Further, in the embodiment shown above, the retaining protrusion 66 is provided on the opposite side of the central inclined surface 63a of the flat plate portion 62, but the present invention is not limited to this. It may be provided on the opposite side of the lateral inclined surface 63b.

Further, in the embodiment shown above, the retaining protrusion 66 is supported and the rib 64 continuous in the longitudinal direction of the seat edge member 61 is provided, but the present invention is not limited to this. The rib may be a pillar or a block-shaped protrusion that supports the vicinity of the base end portion 67 of the retaining protrusion 66. Alternatively, the ribs may not be provided.

Further, in addition to the chairs shown above, it can also be applied to members having a tension material that receives a load, such as a screen panel and a rope for hanging clothes and the like.

1 ... Leg 11 ... Multi-legged 11a ... Caster 12 ... Pillar 13 ... Outer cylinder 14 ... Inner cylinder 2 ... Support 3 ... Seat receiving member 4 ... Seat body 40 ... Seat frame (holding member) 41 ... Seat frame (holding member) 41 ... Seat frame 42 … First seat reinforcement chair 43… Second seat reinforcement chair 46… Downward hole 47… Groove recess (engagement part) 50… Seat frame 51… Vertical rod 52… Horizontal rod 53… Reinforcing plate part 55… Mounting groove (insertion) Groove) 55a ... Entrance 55z ... Back 60 ... Seat tensioning member 61 ... Seat edge material (edge material) 62 ... Flat plate (base) 63 ... Wide recess (recess) 64 ... Rib (reinforcing part) 66 ... Retaining protrusion (Protruding part) 67 ... Base end (base end) 68 ... Protrusion 71 ... Seat tension material (tension material) 8 ... Backrest 80 ... Back frame (holding member) 81 ... Back frame 82 ... Lower side 83 ... Side side Part 84 ... Upper side 86 ... Back front frame 87 ... Vertical rod 88 ... Horizontal rod 89 ... Armrest 90 ... Back upholstery member 91 ... Back edge material (edge material) 96 ... Back upholstery material (upholstery material) 100 ... Chair

Claims (7)

The tension material that receives the load and
The edge material provided at the edge of the upholstery material and
A holding member for holding the edge material is provided.
The holding member is
The insertion groove into which the edge material is inserted and
It has an engaging portion formed in the insertion groove portion and engages with the edge material, and has an engaging portion.
The edge material is
A base connected to the edge of the upholstery and
A protrusion protruding from the base in one direction intersecting the opening direction of the insertion groove,
In opposite surface to the surface on which the projecting portion projects in the base, in a position opposite to the protruding portion, have a, a recess formed as depressed in the one direction,
The upholstery structure of the upholstery material , wherein the recess is inclined so as to be gradually recessed in one direction from the outer edge side to the inner edge side of the base portion. The tension material that receives the load and
The edge material provided at the edge of the upholstery material and
A holding member for holding the edge material is provided.
The holding member is
The insertion groove into which the edge material is inserted and
It has an engaging portion formed in the insertion groove portion and engages with the edge material, and has an engaging portion.
The edge material is
A base connected to the edge of the upholstery and
A protrusion protruding from the base in one direction intersecting the opening direction of the insertion groove,
On the surface of the base portion opposite to the surface on which the protrusion protrudes, a recess formed so as to be recessed in one direction is provided at a position opposite to the protrusion.
The recess is
Central slope and
It has laterally inclined surfaces arranged on both sides of the edge material in the longitudinal direction on the central inclined surface.
A stretched structure of a stretched lumber, characterized in that a longitudinal end portion of the edged lumber on the laterally inclined surface is continuous with the opposite surface of the base portion. The upholstery structure according to claim 1 or 2 , wherein the recess is formed so that the depth gradually increases toward a position opposite to the protrusion. The upholstery structure according to any one of claims 1 to 3, wherein the edge member has a reinforcing portion that protrudes in one direction from the base portion and supports the base end of the protruding portion. .. The upholstery structure of a upholstery material according to claim 4 , wherein the reinforcing portion is a rib continuous in the longitudinal direction of the edge material. Any one of claims 1 to 5, wherein the insertion groove portion is formed so that the groove width gradually decreases from the opening side toward the inner side opposite to the entrance side. The upholstery structure of the upholstery material described in. A chair comprising the holding member in the upholstery structure of the upholstery material according to any one of claims 1 to 6 as a back frame or a seat frame.

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