JP6242701B2 - Chair - Google Patents

Description

  The present invention relates to a chair to which an optional member can be attached to a back frame to which a tension member is attached.

  2. Description of the Related Art Conventionally, there has been known a chair configured by attaching a mesh ground, which is a tension material, to the frame body of the back constituting the chair. As such a chair, there exists a thing of the following patent document 1, for example. In this structure, a back frame and a seat frame are integrally configured, and a seating surface is formed by attaching a mesh ground to an opening formed in the back frame and the seat frame.

  In this way, a chair provided with a component combining a mesh body with a frame body can be lightweight and highly breathable, and in addition to a frame body or other frame through which the mesh ground can be seen. The combination makes it possible to have an excellent design that can give a light and sophisticated impression.

  In addition, a number of optional member mounting structures for mounting optional members using such a frame structure have been proposed.

  For example, in Patent Document 2, another groove is provided in parallel with the tension member mounting groove along the frame body in order to avoid interference with the tension material, and this groove is used as an option. The member is directly attached.

  Moreover, what was described in patent document 3 is comprised so that an attachment part may be provided in the both sides of a back frame, and the optional member arrange | positioned at the back part of a back may be attached over both attachment parts. . The option member can be moved in the vertical direction along the side portion, and a concave portion and a convex portion are provided on a part of the sliding surface, and the position can be adjusted by changing the engagement positions thereof. It is possible.

JP 2007-260118 A JP2012-15269A JP 2011-101770 A

However, in the case of the configuration described in Patent Document 2, it is necessary to perform the attachment work of the option member while supporting the entire option member, so that the workability is lowered, and the position adjustment and replacement of the option member are frequently performed. It is disadvantageous if you do.
Moreover, when the structure described in patent document 3 is employ | adopted, an option member will become a large-scale thing and the design property of the whole chair may be impaired significantly. In addition, it takes time for installation, and there is a problem in workability when replacing with another type of optional member.

  An object of the present invention is to effectively solve such a problem. Specifically, on the premise that the back is constructed by attaching a tension material to the back frame, the entire structure avoids interference with the tension material. An object of the present invention is to provide a chair capable of easily mounting and exchanging optional members and adjusting the position without impairing the design of the chair.

  That is, the chair of the present invention is a chair having a back constituted by a back frame and a tension member stretched on the front surface of the back frame, and the back frame extends in the left-right direction at the upper part thereof. A mounting groove for attaching the tension member to a position closer to the front than the center in the front-rear direction is formed on the upper surface of the horizontal bar, and a support bar extending in the vertical direction to support the optional member And a mounting member that is attached to the recumbent and a holding member that holds the support rod between the mounting member, the mounting member straddling the rear edge of the recumbent and extending from the lower surface to the upper surface. A latching portion extending along the hook, and is latched by the latching portion to the rear portion of the recumbent rib so as not to interfere with the tension member when sandwiching the rear edge and the front edge of the recumbent rib. It is characterized by being.

  If comprised in this way, it will become possible to attach an optional member stably, without affecting the appearance and sitting comfort, avoiding the interference of the attachment member with respect to a tension material. In addition, it is possible to improve the mounting workability by attaching the mounting member to the reeds constituting the back frame and holding the optional member by using the holding member, and it is easy to adjust and replace the optional member. It is also possible to do this.

  In addition, by performing the screwing operation on the assembled chair from the rear, in order to easily mount the optional member without interfering with the front tension member, the mounting member includes the front mounting member, It is preferable that the front mounting member is divided into a rear mounting member that is screwed from the rear, and the recumbent is held between the front mounting member and the rear mounting member.

  In order to easily adjust the height of the option member, it is preferable that the mounting member and the holding member be configured to change the position where the support rod is held.

  In addition, taking advantage of the point that the back is composed of the back frame and the upholstery material to improve the design, and to further improve the stability when the mounting member is mounted on the side, It is preferable that the dimension in the front-rear direction is larger than the dimension in the direction.

  Furthermore, in order to properly attach the option member without shifting the position of the option member in the left-right direction, a positioning portion for positioning in the left-right direction is configured between the attachment member and the reed. It is effective.

  In order to easily move the support rod up and down without removing the holding member from the mounting member and easily adjust the position of the optional member, the engaging member extends in the front-rear direction to one of the mounting member and the holding member. A pin is provided, and a receiving portion for slidably receiving the engaging pin is provided on the other of the mounting member and the holding member, and a recess provided in the receiving portion and the engaging pin And a latching claw that is received in the recess. When the mounting member and the holding member are moved relative to each other from the state in which the support rod is held, the engaging claw is engaged by the periphery of the recess. It is desirable that the position of the attachment member and the holding member is regulated by locking the pawl.

  According to the present invention described above, on the premise of constituting the back by attaching a tension material to the back frame, without interfering with the tension material, without sacrificing the overall design, installation and replacement of optional members, And it becomes possible to provide the chair which can perform position adjustment easily.

The perspective view which shows the chair to which the option member attachment structure which concerns on one Embodiment of this invention is applied. The side view of the chair. The front view in the state which removed the mesh ground from the chair. The enlarged end elevation which cut | disconnected the vertical shaft of the chair in the AA position of FIG. The expanded end elevation which cut | disconnected the upper frame part of the chair in the BB position of FIG. The expansion perspective view which shows the principal part of the back frame of the chair. The expansion perspective view which shows the lower frame part periphery of the back frame which comprises the chair. The expansion perspective view which shows the state which removed the groove formation member from the state of FIG. The enlarged end elevation which cut and showed the lower frame part of the chair in CC position of Drawing 7 typically. The schematic diagram which decomposes | disassembles and shows the mesh ground and strip | belt body which comprise the chair. The hanger attached to the chair and the expansion perspective view of the attachment member and holding member of a hanger. The exploded view which looked at the attachment member and holding member of the hanger and the hanger from the front. The exploded view which looked at the attachment member and holding member of the hanger and the hanger from back. The expanded hanger which cut | disconnected the attachment member and holding member of the hanger and the hanger in the DD position and EE position of FIG. The expanded hanger which cut | disconnected the attachment member and holding member of the hanger and the hanger in the FF position of FIG. The perspective view which expands and shows a part of front side attachment member of a hanger. The front view which shows the rear side attachment member of the hanger. The expansion perspective view which shows the structure which latches the attachment member and holding member of the hanger. Explanatory drawing at the time of attaching the hanger to the chair from which the height position of a back frame upper end differs. The rear view which shows the example which deform | transformed the option member of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the chair of this embodiment, as shown in FIG. 1, a seat 2 is arranged above a leg 1 and a back 3 is erected on the back of the seat 2, and the seat 2 and the back 3 are placed by the leg 1. It is configured as a swivel chair supported rotatably.

  Here, in the embodiment of the present application, when the direction is indicated, the terms “vertical direction”, “front / rear direction”, and “left / right direction” are used, which are the same as the general direction when the chair is raised as shown in FIG. , A vertical direction (Z direction in the figure), a direction substantially perpendicular to the spine 3 (X direction in the figure), a vertical direction and a direction perpendicular to the front-rear direction (Y direction in the figure).

  The structure of the chair will be described in detail. The leg 1 is configured such that the leg strut 12 is rotatably supported at the center of five leg blades 11 to 11 that extend radially and have casters 11a at the tips. As shown in FIG. 2, a support base 13 serving as a basis for supporting the back 3 and the seat 2 is provided at the upper end 12 a of the leg column 12. A gas spring (not shown) is incorporated in the leg column 12, and the upper end 12 a of the leg column 12 can be moved up and down together with the support base 13 by operating this.

  The support base portion 13 is formed of a rigid body such as an aluminum die cast, extends slightly forward and forward from the leg column 12, and the tip 13 a supports the front portion 21 a of the seat 21. A seat surface 22 including a cushion is provided in the upper portion of the seat receiver 21, and the seat 2 is configured by these.

  Further, the support base 13 rotatably supports a back support rod 14 formed of a metal frame at the left and right positions of the leg support 12, and the back support rod 14 extends rearward and upward. A back frame 31 as a frame is provided at the tip 14a. Further, the rear portion 21b of the seat receiver 21 is rotatably supported at a position midway from the position where the back support rod 14 is supported by the support base 13 toward the tip 14a. Therefore, the back frame 31 and the seat receiver 21 operate in conjunction with the support base 13 while a part of the rotation fulcrum slides, so that a so-called synchro-rocking operation is possible.

  A gas spring type reaction force mechanism 14 s (see FIG. 7) is provided inside the back support rod 14 so as to generate a reaction force against the rearward tilt of the back frame 31. Similarly, a reaction force mechanism (not shown) is also provided inside the support base 13 so as to generate a reaction force against the movement of the seat receiver 21. A resin cover 15 is divided into a plurality of parts around the back support rod 14 and is configured to cover the back support rod 14 together with the reaction force mechanism 14s described above.

  As will be described later, the back frame 31 is provided with a mounting groove G that is open on the outer peripheral side in order to attach a mesh ground 38 that is a tension material. 38 can be attached by inserting an edge 38a (see FIG. 10), and the spine 3 is configured together with the mesh ground 38.

  As shown in FIG. 2, the back frame 31 is inclined slightly rearward as a whole, and is reduced in size in the front-rear direction while being curved upward from below. The back frame 31 is provided with a lumbar support 6 as an optional member as shown in FIG. The lumbar support 6 is disposed on the back surface of the mesh ground 38, and can support the waist through the mesh ground 38 when a seated person leans against the back 3.

  FIG. 3 shows a state in which the mesh ground 38 and the lumbar support 6 are removed from the chair and viewed from the front. The back frame 31 is configured by a frame main body 32 and a groove forming member 36 that forms the above-described mounting groove G (see FIG. 2) in cooperation with the frame main body 32 by attaching to the frame main body 32.

  The frame body 32 is composed of a pair of vertical rods 33, 33 extending in the vertical direction, and a pair of horizontal rods 34, 35 that connect the upper and lower portions to each other. Is formed with a substantially rectangular opening OP. The frame body 32 is molded by resin integral molding using a mold, but can be molded using a metal material such as aluminum.

  The vertical rods 33, 33 arranged on the left and right have a symmetrical shape, but the horizontal rods 34, 35 arranged on the upper and lower sides have completely different functions because they have different functions. Therefore, in the following, the upper reed is referred to as the upper frame portion 34, and the lower recumbent is referred to as the lower frame portion 35.

  When viewed from the front, the vertical rods 33 and 33 are arranged with the interval slightly narrowed upward. Therefore, the spine 3 is configured to become slightly smaller upward. The upper frame portion 34 connected to these is formed to be slightly curved so that the center is convex upward, and the connection portion with the vertical rods 33 and 33 is formed by a smooth arc. The lower frame portion 35 is also formed so as to be connected to the vertical rods 33 and 33 by a smooth curve, and is configured such that the center dimension is about twice as large as the center in both the left and right direction ends. (Refer to FIG. 7), and the back support rod 14 described above is connected to the center portion.

  In addition, the hanger 41 is detachably attached to the upper frame portion 34 by an attachment member 43 and a holding member 46 as optional members. The configuration of the hanger 41 and the attachment member 43 and the holding member 46 for attaching the hanger 41 will be described later.

  As shown in FIG. 2, the vertical rod 33 is provided with a curved portion and an inclined portion in a side view from the bottom to the top. Specifically, immediately above the connecting portion with the lower frame portion 15, a first region R1 that is a curved portion in which the front surface 33a that is a support surface is curved so as to be convex forward, and above the first region R1 The second region R2 that is curved in the direction opposite to the first region R1 so that the front surface 33a is concave toward the front, and the third region that is set above and tilts the front surface 33a toward the rear It is a shape based on an ergonomic viewpoint provided with R3. As shown in the figure, the human spine line LB draws a gentle S-curve, so that the vertical rod 33 also draws a substantially similar curve in a side view. That is, the first region R1 is a waist region that is set at the height position of the waist when a person with a standard figure is seated, and the second region R2 is when the person with the standard figure is seated. The lumbar region and the back region have a shape that substantially matches the curvature of the seated person's spine in a side view. Further, the third region R3 is a shoulder region that is provided at the height position of a standard human body's shoulder and is shaped to separate the back frame 31 from the shoulder of the seated person. The aforementioned lumbar support 6 (see FIG. 1) is provided in the first region R1.

  By attaching the mesh ground 38 to such a vertical rod 33, the mesh ground 38 can be shaped along the front surface 33 a of the vertical rod 33. That is, a waist region (first region R1), a back region (second region R2), and a shoulder region (third region) can be formed on the entire support surface of the seated person on the back 3. Therefore, based on an ergonomic point of view, the waist and back can be supported along the curvature of the human spine, and the body can be held in an appropriate posture with little fatigue even when sitting for a long time. Also, in the shoulder area, based on ergonomics, it is possible to secure a space around the shoulder to make it easier to move the arm and improve work efficiency, and as a support area for relaxing when the upper body is warped It can be used. Since the shoulder region is formed so as to be separated from the shoulder, it does not necessarily have to be provided at the same height as the shoulder as long as it is above the back region, and is slightly lower than the shoulder. Even when formed, the above-described effects can be obtained.

  Here, the AA position in FIG. 3, that is, the end face shape when the vertical hook 33 is cut in the second region R2, is shown in FIG. As shown in this figure, the vertical rod 33 is formed as a plane portion in which the front surface 33a serving as a support surface of the mesh ground 38 is substantially orthogonal to the front-rear direction, and is generally orthogonal to the front surface 33a, that is, It has a shape extending toward the rear. Furthermore, the outer side surface 33b continuing to the outer side of the front surface 33a is formed so as to be inclined inward as it goes rearward. On the inner side of the front surface 33a, a relief surface 33c that inclines inward as it goes rearward is formed, and an inner side surface 33d that inclines toward the outside as it goes rearward is formed continuously with the escape surface 33c. A rear surface 33e is formed between the inner surface 33d and the outer surface 33b. Further, most of the front surface 33a, the outer surface 33b, the clearance surface 33c, the inner surface 33d and the rear surface 33e are connected to each other by smooth curved surfaces. A region formed by adding the flank 33c to the curved surface connecting the front surface 33a and the flank 33c is a flank region Rc that is set inside the front surface 33a and gradually moves away from the mesh ground 38 toward the inside.

  A mounting groove 33g is formed at a position in the vicinity of the front surface 33a in the outer side surface 33b so as to be substantially parallel to the front surface 33a, that is, with the outer peripheral side as an opening direction, and an edge 38a (see FIG. 10) is formed in the mounting groove 33g. When the mesh ground 38 is inserted and attached, the mesh ground 38 is stretched inward from the outer surface 33b via the front surface 33a. Therefore, the front surface 33a functions as a support surface that regulates the position of the mesh ground 38 and contributes to the formation of the overall shape. In addition, since the relief region Rc is formed inside the front surface 33a that is the support surface, the mesh ground 38 hardly affects the cross-sectional area of the entire vertical rod 33, that is, does not cause a decrease in strength. The support area is reduced to make it easier to bend. Furthermore, although the flank 33c is separated from the mesh base 38 in a normal state, when the mesh base 38 is deformed by leaning on a person, it is possible to increase the stability by contacting the mesh base 38. It has become.

  The front surface 33a is designed to have a certain area or more, so that when the seated person shifts his / her posture from side to side, he / she does not bite into his / her back to cause discomfort or discomfort. Further, a relief surface 33c is formed on the inner side of the front surface 33a so as not to form an acute corner, thereby relieving contact with the body. The upper frame portion 34 has a shape that is recessed like a wing cross section toward the rear from the front surface and the flank 33c that can come into contact with the body of the seated person. Furthermore, the rear surface 33e is formed to be sufficiently smaller than the front surface 33a, so that the shape feature is more prominent. In addition, when a simpler shape is assumed in which the inner surface 33c and the front surface 33a are extended without forming the flank 33c, it can also be said that the sectional view is substantially triangular. The vertical rod 33 has such a cross-sectional shape so that the front-rear dimension L2 is larger than the left-right dimension L1 (in the present embodiment, approximately twice). From the viewpoint of the amount of material used, strength, and design, the front-rear dimension L2 is preferably 1.5 times to 3 times the left-right dimension L1. Because of the dimensional relationship as described above, there are few visible portions of the vertical hook 33 through the mesh ground 38 in the front view, and a more refined impression can be given. In addition, since the load on the vertical rod 33 mainly acts as a result of the seat occupant leaning backward, it is possible to ensure the strength against the load on the rear by increasing the front-rear dimension L2. It has become.

  In other words, the vertical rod 33 has a reverse triangle shape with respect to the front and rear dimensions of the front half portion in which the front surface 33a and the flank surface 33c functioning as pressure-receiving surfaces and the groove 33g functioning as a tension member attachment location are formed. The thickness of the latter half of the shape is almost the same or greater.

  The vertical rod 33 has substantially the same shape along the vertical direction including not only the second region R2 but also the first region R1. That is, since the dimension in the front-rear direction (front-rear dimension L2) is smaller than the dimension in the left-right direction (left-right dimension L1), the first region R1, second region R2, It is possible to appropriately form the three regions R3.

  As described above, the front-rear dimension L2 becomes smaller (in the present embodiment, about 1/2) as it goes upward, but the left-right dimension L1 is hardly changed (see FIG. 3). The ratio of the upper front-rear dimension to the lower front-rear dimension L2 is preferably about 30 to 60%. Due to the dimensional relationship as described above, it appears that the size of the vertical hook 33 hardly changes between the upper part and the lower part in a front view, and a stable impression can be given (see FIG. 2). In addition, the bending moment due to the backward load caused by the seated person leaning on is larger toward the lower side of the vertical rod 33 and smaller toward the upper side. Therefore, as described above, the longitudinal dimension L2 is decreased toward the upper side. However, there is no shortage of strength, and it is possible to produce a refined impression that the upper part is thinner in a side view, and it is also possible to reduce the manufacturing cost by reducing the material.

  Next, the shape of the upper frame portion 34 will be described. FIG. 5 shows a cross-sectional shape when the upper frame portion 34 is cut at the BB position in FIG.

  As shown in this figure, the upper frame portion 34 is formed as a flat portion with the front surface 34a extending obliquely upward, and an upper surface 34b that is inclined downward toward the rear continuously above the front surface 34a is formed. Has been. In addition, a relief surface 34c that slopes downward as it goes rearward downward from the front surface is formed, and a lower surface 34d that slopes upward as it goes rearward is formed continuously from the relief surface 34c. ing. Adjacent ones of the front surface 34a, the upper surface 34b, the flank surface 34c, and the lower surface 34d are connected by a smooth curved surface. Similar to the vertical rod 33 (see FIG. 4) described above, a region obtained by adding the flank 34c to the curved surface connecting the front surface 34a and the flank 34c is set on the inner side of the front surface 34a and gradually meshes toward the inner side. This is an escape region Rc that is spaced apart from 38.

  Of the curved surface connecting the front surface 34a and the flank 34c, the most forwardly protruding portion constitutes the leading edge Ef along the extending direction of the upper frame portion 34, and is a curved surface connecting the upper surface 34b and the lower surface 34d. Of these, the rearmost protruding portion constitutes the rear edge Er along the extending direction of the upper frame portion 34.

  A mounting groove 34g is formed in the upper surface 34b at a position forward from the center position in the front-rear direction, specifically, at a position near the front surface 34a, substantially parallel to the front surface 34a, that is, with the outer peripheral side as the opening direction. If the mesh ground 38 is attached by inserting the edge 38a (see FIG. 10) into the mounting groove 34g, the mesh ground 38 extends from the upper surface 34b along the front surface 34a, and the shape of the upper portion of the vertical rod 33 Will be arranged diagonally downward.

  Like the front surface 33a of the vertical rod 33, the front surface 34a functions as a support surface that supports the mesh ground 38. Since the escape region Rc is formed inside the front surface 34a that is the support surface, the upper frame The support area of the mesh ground 38 is reduced without substantially affecting the cross-sectional area of the entire portion 34, that is, without causing a decrease in strength, so that bending is easily caused. Furthermore, the front surface 34a has a certain area or more, and when the seated person makes his / her body bow, the upper frame portion 34 bites into the back. It does not cause discomfort or discomfort. In addition, a relief surface 34c is formed below the front surface 34a so as not to form an acute corner, thereby softening contact with the body. And the upper frame part 34 is made into the shape which became constricted like the wing | blade cross section toward the back from the front surface 34a and flank 34c which can contact a seated person's body. In addition, when the simple shape which does not provide the flank 34c is assumed, it can be said that it is formed in the cross-sectional view substantially triangular shape which goes to the rear edge Er from the front surface 34a. By doing so, the front-rear dimension L4 is made larger than the vertical dimension L3 (in the present embodiment, approximately 1.7 times). From the viewpoint of the amount of material used, strength, and design, the front-rear dimension L4 is preferably 1.4 times to 2.5 times the left-right dimension L3. Because of the above dimensional relationship, it is possible to give a more refined impression with fewer visible parts of the upper frame part 34 through the mesh ground 38 in the front view as with the vertical gutter 33. It is possible to ensure the strength against the backward load that mainly acts.

  In other words, like the vertical rod 33, the upper frame portion 34 also has a front-rear dimension and a front-rear dimension in which a front surface 34a and a flank surface 34c that function as pressure-receiving surfaces and a groove 34g that functions as a tension member attachment location are formed. The thickness of the latter half of the inverted triangular shape is almost the same or larger.

  The upper frame portion 34 and the vertical rod 33 are smoothly continuous as shown in FIG. 6, and the mounting grooves 34g and 33g provided in each are also formed to be continuous. Therefore, the mesh ground 38 is stretched while forming a smooth surface between the upper frame portion 34 and the vertical rod 33.

  Next, the shape of the lower frame part 35 will be described. Since the lower frame portion 35 is connected to the back support rod 14 as described above, the lower frame portion 35 is configured to be larger than the other vertical rod 33 or the like as shown in FIG. The back support rod 14 is screwed to the lower surface of the lower frame portion 35, and the reaction force mechanism 14s described above is provided therein.

  The lower frame portion 35 is connected to the upper plate portion 35a extending in the left-right direction and constituting a part of the peripheral edge of the above-described opening, and the lower frame 35 is connected to the center of the rear portion of the upper plate portion 35a. It is comprised by the board part 35b and the side board parts 35c and 35c connected to the lower board part 35b and the upper board part 35a from the right and left vertical rods 33 and 33, and is mutually connected by the smooth curved surface. As a result, the lower frame part 35 forms a concave internal space S that is opened forward and the opening forms a substantially inverted trapezoid. The internal space S also functions as a meat stealer in molding, contributing to the reduction of materials and weight reduction. Further, the lower plate portion 35b is set to have a larger size in the front-rear direction than the upper plate portion 35a in order to ensure a wide mounting space for the back support rod 14 that supports the entire back 3. The lower plate portion 35b also functions as a support rod continuous with the back support rod 14, and is formed integrally with the frame main body 32, so that the number of parts can be reduced and an overall sense of unity can be obtained. An appearance can be obtained. If this is not a problem, the lower plate portion 35b and the side plate portions 35c and 35c can be configured separately from the frame main body 32. The lower frame portion 35 as a whole has a shape that is longer in the front-rear direction than the vertical frame 33 and the upper frame portion 34, and gives a more unified and refined excellent design. ing.

  However, unlike the vertical rod 33 and the upper frame portion 34, the mesh ground 38 interferes with the back support rod 14 even if the mounting groove G having the outer peripheral side as the opening direction is formed in the lower plate portion 35 b and the side plate portion 35 c. For this reason, it becomes impossible to perform installation. For this reason, a mounting groove 35g having an outer peripheral side in the open direction is formed below the upper plate portion 35a in the lower frame portion 35, and is configured to be continuous with the mounting grooves 33g and 34g of the vertical rod 33 and the upper frame portion 34. Can be considered. However, since the lower frame portion 35 is formed with the internal space S opened forward as described above, when the lower frame portion 35 is molded using a mold, the mold The pulling direction is set to the front-rear direction. Therefore, the mounting groove G is formed on the upper plate part 35a whose lower part is covered by the lower plate part 35b, that is, at the position overlapped by the lower plate part 35b when viewed from the outer peripheral side, even if a slide mold is used. It is difficult to do. With regard to the above points, when focusing on the positional relationship with the attachment groove G as the center, the attachment groove 35g formed in the lower frame portion 35 for attaching the mesh ground 38 intersects the surface extending in the opening direction (outer peripheral direction). It can be considered that the lower plate portion 35b having another structure is integrally provided at the position where the operation is performed.

  Therefore, in the present embodiment, as shown in FIG. 8, the mounting groove 35 g (see FIG. 9) is formed by mounting the groove forming member 36 along the upper plate portion 35 a in the internal space S of the lower frame portion 35. It is possible to do. Since the internal space S is largely open to the groove forming member 36, it is possible to easily perform the attaching operation. The groove forming member 36 is a flat plate member along the upper plate portion 35a, and the through holes 36a are formed at five positions spaced apart in the left-right direction. And the back frame 31 which is a frame body is comprised with the frame main body 32 by screwing using this through-hole 36a and the screw hole 35d1 formed in the lower frame part 35. As shown in FIG.

  Specifically, as shown in FIG. 9, the upper plate portion 35a is provided with a step portion 35d formed by being recessed backward, and the screw hole 35d1 described above is formed in the step portion 35d. A recess 35e formed by further recessing is provided below the step 35d. Then, by attaching the groove forming member 36 to the stepped portion 35d, it is possible to form the attachment groove 35g between the concave portion 35e and the groove forming member 36.

  The mounting groove 35g is formed over substantially the entire circumference of the back frame 31 provided with the opening OP together with the mounting grooves 33g and 34g formed in the vertical rod 33 and the upper frame portion 34, for attaching the mesh ground 38. A substantially continuous mounting groove G is formed. As shown in FIG. 7, the mounting groove 33 g formed in the vertical rod 33 is interrupted at a position close to the lower frame portion 35, and the mounting groove 35 g formed by the lower frame portion 35 and the groove forming member 36 is Not continuous. However, since the end portions of both the mounting grooves 33g and 35g are formed in a continuous positional relationship when they are extended to each other, it can be considered that they are substantially continuous. Of course, by changing the shape of each member, the mounting groove G can be configured to be completely continuous.

  When the mesh ground 38 is attached, the groove forming member 36 is covered with the lower frame portion 35 and the mesh ground 38, so that the groove forming member 36 hardly stands out and the back frame 31 is connected to the frame main body 32. Even if divided into the groove forming member 36, the design is not impaired. Further, the mesh ground 38 is attached to the lower frame portion 35 constituting the back frame 31, thereby covering the entire opening OP formed in the back frame 31, creating a sense of unity of the entire back 3, and the back 3 Since it is arranged below the seat 2 in the front view (see FIG. 3), it is possible to have a more luxurious design.

  Here, as shown in FIG. 10, the mesh ground 38 is cut into a back shape and a band-shaped reinforcing band 39 is attached to the edge 38a inserted into the mounting groove G (see FIG. 2) by sewing. Therefore, the mesh ground 38 is configured so that the edge 38a is inserted into the mounting groove G together with the reinforcing band 39, so that the mesh 38 can be held in a firmly inserted position and the form can be stabilized. The portions corresponding to the vertical rods 33 and 33 and the upper frame portion 34 are attached by sewing three-dimensionally while bending one reinforcing band 39, and only another reinforcing band only on the portion corresponding to the lower frame portion 35. 39 is attached. Between the two reinforcing bands 39, 39 is a portion located between the mounting groove 33 g formed in the vertical rod 33 and the groove 35 g provided in the lower frame portion 35, and a simple recess 38 b to which the reinforcing band 39 is not attached. Only fraying processing of the mesh ground 38 is performed.

  In this way, the mesh ground 38 is inserted into the mounting groove G formed over the entire circumference of the back frame 31, so that the mesh 3 is stretched on the front surface along the shape of the back frame 31, thereby configuring the back 3. I am doing so. Since the mounting groove G is formed with the outer peripheral side open at each position, the edge 38a of the mesh base 38 can be easily inserted, and the mounting work can be easily performed. Further, since the mesh ground 38 extends in a direction approximately 180 ° opposite to the mounting groove G, the direction in which the tension acts and the opening direction of the mounting groove G are almost opposite to each other, and do not come off easily. .

  Moreover, the front surface of the back 3 can be made into an appropriate shape by attaching the mesh ground 38 to the attachment groove G of the back frame 31. Specifically, as described above with reference to FIG. 2, the vertical rod 33 has a first region R <b> 1, a second region R <b> 2, and a third region R <b> 3 formed from below in a side view. The mesh ground 38 is stretched while generating undulations and a flat surface, and the entire back 3 can be easily maintained in this shape. Therefore, despite the relatively simple structure in which the mesh ground 38 is attached to the back frame 31, the shape of the back 3 can be made comfortable and suitable for the body of the seated person.

  Hereinafter, the attachment structure of the hanger 41 that is an optional member attached to the upper frame portion 34 will be described. As shown in FIGS. 1 to 3 and FIG. 11, the hanger 41 has a function of hanging clothes on a chair so that clothes worn by a seated person can be hung. As shown in FIG. 13, a support rod 42 including a left and right two flanges 42 a, 42 a and a connecting portion 42 b that connects lower portions of the two flanges 42 a is integrally provided. And this hanger 41 is attached to the center part of the upper frame part 34 (refer FIG. 3) with the attachment member 43 which consists of the front side attachment member 44 and the rear side attachment member 45, the holding member 46, and the clamping screw 47. FIG.

  The configuration of the hanger 41 and its mounting structure will be described in detail. First, as shown in each drawing of FIGS. 1 to 3, the hanger 41 is convex upward in a front view and convex backward in a plan view. It is curved and extends to approximately the same width as the back 3, so that it is formed along the curvature of the upper frame portion 34. The design is unified with the back frame 31, the clothes are easy to put on, and unnecessary. The increase in installation space is prevented. Moreover, the hanger 41 is substantially equal width in plan view, and the thickness in front view is also substantially equal. Furthermore, the end portion 41a has a smooth curve, giving a soft impression.

  The support rod 42 is connected to the lower portion of the hanger 41 and extends downward as shown in FIGS. 11 to 13 and has two plate-like parallel rods 42a and 42a whose normal directions are set in the left and right directions. It is composed of a connecting portion 42b that connects the two flanges 42a and 42a and forms a smooth downward arc, and the interval between the two flanges 42a and 42a is about half of the length of the upper frame portion 34. (See FIG. 3). In addition, circular concave portions 42q1 and 42q2 are provided at two portions, the upper and lower portions, which are separated by a distance Hd, in the portion that contacts the attachment member 43 in front of the flanges 42a and 42a.

  As shown in FIG. 2, the heels 42 a and 42 a warp upward in the side view so that the back 3 and the clothes do not interfere with each other when the clothes are put on the hanger 41. Since there is a sufficient gap between the connecting portion 42b and the spine 3 as shown in FIG. 2, the connecting portion 42b can be gripped, and the handle is moved when the chair is moved. It can be used as.

  12 to 15, the mounting member 43 includes a front mounting member 44 and a rear mounting member 45, and the front mounting member 44 and the rear mounting are provided at approximately a center portion (see FIG. 3) of the upper frame portion 34. The member 45 is sandwiched by sandwiching the upper frame portion 34 from the front-rear direction, and the support member 42 is sandwiched together with the holding member 46. The shape is curved so as to protrude rearward in plan view along the upper frame portion 34, and the surroundings except for the front of the front surface 34 a and the upper surface 34 b of the upper frame portion 34 are sandwiched by sandwiching the upper frame portion 34. It covers 3/4. Further, in the front view of FIG. 3, the central portion in the left-right direction is thicker and thinner toward the end portion.

  12-15, the front mounting member 44 is configured to support the flank 34c and the front edge Ef of the upper frame 34, and the front edge Ef and the flank of the upper frame 34 in front view. As shown in FIGS. 14 and 15, the bottom plate portion 44b located below the upper frame portion 34 and the upright portion 44a extending upward are smoothly connected so as to cover 33c. ing. As shown in FIG. 13, both ends in the left-right direction of the bottom plate portion 44 b rise upward, and the upper surface constitutes a part of a support surface 44 d that supports the upper frame portion 34. In addition, two vertical plates 44g and 44g are provided at the center in the left-right direction at the upper portion of the bottom plate portion 44b, and nut holes 44f and 44f (see FIG. 16) are provided on the left and right sides of the vertical plate 44g. The formed vertical walls 44h and 44h are provided. As shown in FIG. 16, the nut hole 44f is a rectangular parallelepiped hole that opens above the vertical wall 44h, and the rear wall surface is provided with an insertion hole 44s that penetrates to the surface facing the rear mounting member 45. Therefore, the nut 47a is introduced from the upper part and can be fastened by using the bolt 47 inserted into the insertion hole 44s from the rear.

  Further, as shown in FIGS. 14 and 15, the upright portion 44 a constitutes a part of the support surface 44 d that supports the upper frame portion 34 and the upper portion 44 a is in contact with the vicinity of the front edge Ef of the upper frame portion 34. The upper surfaces of the vertical plates 44g and 44g and the vertical walls 44h and 44h constitute a part of the support surface 44d and are in contact with the flank 34c of the upper frame portion 34. The support surface 44d is composed of the upper surfaces of both ends of the bottom plate portion 44b, the upper surfaces of the standing portions 44a, the upper surfaces of the vertical plates 44g and 44g, and the upper surfaces of the vertical walls 44h and 44h. The support surface 44d is formed to be curved along a curve that protrudes downward in a side view of the upper frame portion 34.

  Further, as shown in FIGS. 13 and 14B, the front mounting member 44 has a triangular shape in a side view, and protrusions 44p and 44p protruding rearward are provided in the left-right direction 2 on the upper surface of the upright portion 44a. It is provided at a place. As shown in FIGS. 11 to 14, a notch 44 i is provided at the center of the tip of the upright portion 44 a so that it can be engaged with a projection (not shown) provided on the upper frame portion 34.

  On the other hand, as shown in FIGS. 14 and 15, the rear mounting member 45 has a latching portion 45 b composed of an upper surface portion 45 b 1 that holds the upper surface 34 b of the upper frame portion 34 and a lower surface portion 45 b 2 that holds the lower surface 34 d. Yes. The upper surface portion 45b1 extends in the left-right direction and has a flat plate shape, both ends are bent downward, and a vertical plate 45e is provided at the center in the left-right direction, and the lower surface of both ends of the upper surface portion 45b1 and the vertical plate 45e An inner upper surface 45d1 that comes into contact with the upper frame portion 34 is formed by the lower surface and the lower surface of the upper surface portion 45b1 on the left and right sides (see FIG. 17). Further, the lower surface portion 45b2 has an inner lower surface 45d2 that is a surface in contact with the lower surface 34d of the upper frame portion 34 in the left-right direction, and is shaped like a reverse shape when viewed from the side by the inner upper surface 45d1 and the inner lower surface 45d2. The contact surface with the upper frame portion 34 is formed so as to be smoothly curved along a curve that protrudes rearward in a plan view of the upper frame portion 34.

  Note that both ends of the upper surface portion 45b1 and the vertical plate 45e are formed so that the size in the vertical direction becomes smaller toward the front, so that the upper surface portion 45b1 does not protrude upward with respect to the upper frame portion 34. In addition, since the rear attachment member 45 is hardly visible in a front view when attached to the upper frame portion 34, the design is more clearly visible.

  12 and 17, the lower front side of the rear mounting member 45 is a contact surface 45c extending in the left-right direction, and a contact surface 44c (FIG. 13 and FIG. 13) that is the rear surface of the front mounting member 44. 16), and the contact surface 45c is provided with two insertion holes 45s and 45s penetrating in the front-rear direction. As shown in FIG. 15, the insertion holes 45s and 45s are continuous with the insertion holes 44s and 44s of the front mounting member 44 and the insertion holes 46s and 46s of the holding member 46 described later. Returning to FIG. 17, the contact surface 45c is provided with vertical grooves 45g to 45g on both sides of the insertion holes 45s and 45s, and on the outside thereof, ribs 45f to 45f are provided below the lower surface 45b2. The ribs 45f to 45f support the lower surface portion 45b2 from below. Furthermore, lower edge grooves 45h and 45h are provided at two places on the left and right sides along the lower edge of the contact surface 45c, and lightening 45i and 45i are provided at both ends of the contact surface 45c.

  As shown in FIG. 13, support grooves 45a and 45a are formed on the rear surface 45e of the rear mounting member 45 on the left and right at the same interval as the interval between the two flanges 42a and 42a. The support grooves 46a, 46a and the flanges 42a, 42a are surrounded by the front and rear directions.

  In addition, as shown in FIGS. 13 to 15, below the rear surface of the rear mounting member 45, a recess 45 x extends in the left-right direction inside the support grooves 45 a, 45 a, and similarly, the rear surface of the rear mounting member 45 A recess 45y extends in the left-right direction inside the support grooves 45a, 45a, and the recesses 45z, 45z extend in the up-down direction at the left and right ends of the rear surface of the rear mounting member 45. Yes. In addition, a rectangular recess 45x1 is further provided in the lower central portion of the bottom surface of the recess 45x. The recesses 45x, 45y, 45z, and 45z and the recess 45x1 are engaged with the protrusions 46x, the upper protrusions 46y, the end protrusions 46z and 46z, and the protrusions 46x1 (see FIG. 12) of the holding member 46. ing. Further, between the recess 45x and the recess 45y on the rear surface of the rear mounting member 45, the engagement pins 45w protrude rearward at two right and left so as to fit the receiving portion 46w of the holding member 46. (See FIG. 18).

  Next, the holding member 46 shown in FIG. 12 is a member that is engaged with the rear mounting member 45 from the rear while sandwiching the support rod 42 so as to hold the hanger 41. As shown in FIGS. The shape of is formed so as to become thinner toward the rear. Accordingly, when the holding member 46 is attached to the upper frame portion 34 together with the attachment member 43, the side view shape formed by the attachment member 43 and the holding member 46 is substantially similar to the shape of the upper frame portion 34. Further, as shown in FIG. 12, support grooves 46a and 46a extending in the vertical direction so as to surround the support rod 42 described above are formed on the front surface (front surface in FIG. 12) of the holding member 46 at the left and right ends in front view. Provided in the department.

  On the front surface of the holding member 46, a protrusion 46x for engaging with the rear attachment member 45, an upper protrusion 46y, and end protrusions 46z and 46z are provided. Specifically, the protrusion 46x is provided at the center bottom of the holding member 46 so as to extend in the left-right direction inside the support grooves 46a, 46a and protrude forward. More specifically, the protrusion 46x has a plate-like portion that is continuous with the lower surface of the holding member 46 and a shape that rises above both ends in the left-right direction. Further, three vertical plates 46c to 46c are provided in the left-right direction above the protrusion 46x. Further, the upper protrusion 46y is provided at the center upper portion of the holding member 46 so as to extend left and right inside the support grooves 46a and 46a and to protrude forward. The end projections 46z and 46z are provided at both end portions outside the support grooves 46a and 46a so as to form a rectangular shape extending in the vertical direction and project forward.

  In addition, cylindrical receiving portions 46w are provided at two positions on the left and right of the lower portion of the upper projection 46y so as to engage with the engaging pins 45w of the rear mounting member 45, and engage with the holes inside the receiving portions 46w. A pin 45w is inserted and is slidably held. As shown in FIG. 15, insertion holes 46 s and 46 s penetrating in the front-rear direction are formed so as to be continuous with the insertion holes 45 s and 45 s of the rear mounting member 45, as shown in FIG.

  Hereinafter, the attachment structure of the hanger 41, the attachment member 43, and the holding member 46 when the hanger 41, the attachment member 43, and the holding member 46 configured as described above are attached to the upper frame portion 34 will be described.

  As shown in the exploded views of FIGS. 12 and 13 and the end views of FIGS. 14 and 15, the hanger 41 sandwiches the upper frame portion 34 between the front mounting member 44 and the rear mounting member 45 and holds the hanger 41 with the rear mounting member 45. It is attached by sandwiching the support rod 42 (杆 42a) with the member 46. Specifically, the fastening screws 47, 47 are inserted into the insertion holes 46s, 46s, 45s, 45s, 44s, 44s provided at two lower portions of the holding member 46, the rear mounting member 45, and the front mounting member 44 from the rear. Through, the tightening screws 47, 47 are screwed into the nuts 47a, 47a provided in the nut holes 44f, 44f of the front mounting member 44, so that the holding member 46, the rear mounting member 45, the front mounting member 44, and The support rod 42 and the upper frame portion 34 sandwiched between the two are fixed. At this time, as shown in FIG. 14B, the upper frame portion 34 and the rear attachment member 45 are provided with protrusions 44p and 44p (see FIG. 13) provided at two places in the left-right direction of the front attachment member 44. The left and right positions are determined and engaged by a positioning portion 48 including notches 45p and 45p provided on the corresponding upper frame portion 34 side. Further, the rear surface of the bottom plate portion 44b, the vertical plates 44g and 44g and the vertical walls 44h and 44h of the front mounting member 44 is a contact surface 44c that contacts the rear mounting member 45, and is located in front of the rear mounting member 45. The contact surface 45c extending in the left-right direction at the lower side is curved so as to protrude upward in the front view along the upper frame portion 34 and to protrude rearward in the side view, and the front mounting member 44 and the rear side The mounting member 45 is in contact with the contact surface 44c and the contact surface 45c.

  Next, the relationship between the upper frame portion 34 and the attachment member 43 will be described in detail. As shown in FIGS. 14 and 15, the upper frame portion 34 is in contact with the support surface 44 d from the clearance surface 34 c to the vicinity of the front edge Ef, and the lower surface 34 d and the upper surface 34 b including the rear edge Er are respectively the rear attachment members 45. Are in contact with the latching portion 45b (the upper surface 45b1 and the lower surface 45b2). As a result, both the front edge Ef and the rear edge Er of the upper frame portion 34a are supported by the mounting member 43, so that the upper frame portion 34 can be stably held. At this time, the hooking portion 45b of the rear mounting member 45 has about 50% of the entire circumference of the upper frame portion 34 because the upper surface 34b and the lower surface 34d are longer than the front surface 34a and the clearance surface 34c of the upper frame portion 34. Since the gripping is performed in the state of being held, it is possible to sufficiently support the force applied in the vertical direction, and it is also possible to keep the movement and rotation in the front-rear and left-right directions impossible. That is, even if clothes are hung on the hanger 41 and a rearward moment is applied to the rear attachment member 45, the latching portion 45b can firmly hold the relative position of the attachment member 43 and the upper frame portion 34. The front mounting member 44 does not need to hold the upper frame portion 34 so as to greatly exceed the front edge Ef on the front surface 34a side, and only has a function of preventing the detachment in the front-rear direction. Therefore, the upright portion 44a can be formed in a thin plate shape, and does not interfere with the mesh ground 38 stretched along the front surface 34a of the upper frame portion 34.

  The positioning portion 48 described above (see FIG. 14B) also has an effect of supporting a part of the backward moment applied to the rear mounting member 45 when clothes are hung on the hanger 41. Further, since the extending direction of the mesh ground 38 is a direction away from the front face 34a, interference between the front face 34a of the upper frame portion 34 and the mesh ground 38 can be further suppressed. Moreover, since the standing part 44a is arrange | positioned below rather than the plane which the front surface 34a of the upper frame part 34 makes, it is possible to suppress interference with the mesh ground 38 more.

  With the above-described configuration, the upper frame portion 34 and the attachment member 43 can be fixed only by the left and right fastening screws 47, 47 provided at the lower part of the attachment member 43.

  Next, the relationship between the attachment member 43 and the holding member 46 and the support rod 42 will be described in detail. When the mounting member 43 and the holding member 46 hold the support rod 42, the support rod 42 is passed through the support grooves 46a and 46a provided in the holding member 46 as shown in FIGS. Each of the plates 46c to 46c, the upper projection 46y, and the end projections 46z and 46z fits into the recess 45x, the recess 45y, and the recesses 45z and 45z provided in the rear mounting member 45, and the rear mounting member 45 is engaged. By fitting the pin 45w and the receiving portion 46w of the holding member 46, the rear mounting member 45 and the holding member 46 are fixed, and the support rod 42 is sandwiched.

  Here, as shown in FIG. 18, the engagement pin 45w is formed of a quadrangular column 45w2 provided with a locking claw 45w1 at the tip, and a semi-cylinder 45w3 provided so as to face the inner side in the left-right direction. In addition, a through-hole 45w4 penetrating in the front-rear direction is provided on the outer side in the left-right direction (the left side in the drawing) of the rectangular column 45w1. When the engaging pin 45w is inserted into the receiving portion 46w, the locking claw 45w1 is received in the rectangular opening 46w1 as a recess provided on the side surface of the receiving portion 46w. Once the claw 45w1 is accommodated in the opening 46w1, when the attachment member 43 and the holding member 46 are relatively moved in the front-rear direction from the state in which the support rod 42 is held, the claw 45w1 is engaged by the opening edge 46w2 as the peripheral edge of the opening 46w1. The pawl 45w1 is locked. Therefore, once these engagement pins 45w and the receiving portion 46w are fitted together, the interval between the square column 45w2 and the semi-cylinder 45w3 is reduced and the engagement between the engagement claw 45w1 and the opening edge 46w2 of the opening 46w1 is not released. As long as it cannot be separated, the mounting member 43 and the holding member 46 are subjected to position restrictions by the locking claws 45w1 and the opening edge 46w2. The opening 46w1 has an opening length L5 in the front-rear direction in which the engagement pin 45w is inserted, and the locking claw 45w1 is movable within the opening length L5 within the opening 46w1. The receiving portion 46w is capable of sliding in the front-rear direction while maintaining a fitted state.

  By the way, as shown in FIGS. 12 and 13, when the support rod 42 is clamped by the mounting member 43 and the holding member 46, the recess 42q1 (42q2) provided in the flanges 42a and 42a and the rear mounting member 45 are provided. The guide portion 49 formed of the convex portion 45q provided in the support groove 45a can selectively guide the relative position of the support rod 42 with respect to the mounting member 43, and thereby the support rod with respect to the upper frame portion 34. The relative position in the vertical direction of 42 (hanger 41) can be adjusted. Specifically, the support rod 42 can slide up and down when the tightening screws 47 and 47 are loosened. When the tightening screws 47 and 47 are tightened, as shown in FIG. The height is fixed by engaging the concave portion 42q1 (42q2) of the 42 and the convex portion 45q of the rear mounting member 45. When changing the mounting height position of the hanger 41 (support rod 42), once loosen the fastening screws 47, 47, move the support rod 42 up and down, and align the convex portion 45q with the concave portion 42q2 (42q1). The tightening screws 47 and 47 are tightened. At this time, the rear attachment member 45 and the holding member 46 are arranged such that the engagement pin 45w of the rear attachment member 45 and the receiving portion 46w of the holding member 46 are fitted to each other, and the opening length of the opening 46w1 shown in FIG. Since it is slid by L5, the rear mounting member 45 and the holding member 46 are not completely separated. Therefore, the support rod 42 can be slid up and down without completely removing the holding member 46, and the hanger 41 (support rod 42), the mounting member 43 and the holding member 46 can be handled as a unit. 41 can be easily adjusted. Further, when the hanger 41 (support rod 42) is removed from the attachment member 43 and the holding member 46, or when the hanger 41 is changed to another hanger 41, the interval between the square column 45w1 and the semi-cylinder 45w2 of the engagement pin 45w is reduced. Thus, the locking claw 45w1 can be unlocked by the opening edge 46w2 of the opening 46w1, the engaging pin 45w can be extracted from the receiving portion 46w, and the holding member 46 can be removed. In addition, in the hanger 41 of this embodiment shown to FIG.3, 11, etc., the two hooks 42a and 42a of the support rod 42 have the structure where the lower part was connected by the connection part 42b, However, exchange of the hanger 41 is carried out. In order to facilitate, it is also preferable to adopt a structure in which the lower part is not connected as a configuration in which the connecting part 42b is not provided. By doing this, the support rod 42 is removed from the rear mounting member 45 and the holding member 46 by simply loosening the fastening screws 47, 47 without separating the rear mounting member 45 and the holding member 46, and the hanger 41 is removed. Can be exchanged.

  In the present embodiment, the positions (intervals Hd) of the recesses 42q1 and 42q2 are the same as the height position Hx of the upper end of the back frame of the high-back product CX of the same series as shown in FIG. 19 and the low-back product CY. This corresponds to the difference in the height position Hb of the upper end of the back frame. That is, the distance Hd between the recess 42q1 and the recess 42q2 is equal to the difference between the height position Hx of the upper end of the back frame of the high-back product CX and the height position Hy of the upper end of the back frame of the low-back product CY (Hd = Hx-Hy). In the high-back product CX and the low-back product CY, the configurations of the legs 1 and the seat 2 are the same, and only the back shape (high-back product: 3X, low-back product: 3Y) is different. These are different in the vertical length of the above-mentioned second region R2 (see FIG. 2), and have almost the same design. When the hanger 41 is attached to the high-back product CX, the convex portion 45q of the rear attachment member 45 is engaged with the upper concave portion 42q1 and when the hanger 41 is attached to the low-back product CY, the convex portion 45q of the rear attachment member 45 is engaged. And 34Y, even when the hanger 41 is attached to both types of chairs, the mounting height position H of the hanger 41 can be aligned, and even when both types of chairs are lined up, a uniform appearance can be obtained. It is possible.

  As described above, the chair according to the present embodiment is a chair provided with the back 3 constituted by the back frame 31 and the mesh ground 38 that is a tension material stretched on the front surface of the back frame 31, and the back frame 31 is the upper part thereof. The upper frame portion 34 is a horizontal ridge extending in the left-right direction, and an attachment groove 34g for attaching the mesh ground 38 is formed on the upper surface of the upper frame portion 34 at a position closer to the front than the center in the front-rear direction. At the same time, a support rod 42 extending in the vertical direction to support the hanger 41 as an optional member, an attachment member 43 attached to the upper frame portion 34, and the support rod 42 are held between the attachment members 43. And the mounting member 43 further includes a latching portion 45b extending over the upper surface 34c from the lower surface 34d, straddling the rear edge Er of the upper frame portion 34, and the upper frame portion by the latching portion 45b. 34 is hooked to the rear , Which is constituted as attached so as not to interfere with the mesh member 38 when sandwich the edge Er a front edge Ef after top frame portion 34.

  Since it comprises in this way, it becomes possible to attach the hanger 41 stably, without affecting the appearance and sitting comfort, avoiding the interference of the attachment member 43 with respect to the mesh ground 38. In addition, the attachment work 43 can be improved by attaching the attachment member 43 to the reed 34 constituting the back frame 31 and holding the hanger 41 using the holding member 46, and adjusting the position of the hanger 41. It is also possible to easily perform replacement.

  In addition, the attachment member 43 is divided into a front attachment member 44 and a rear attachment member 45 screwed to the front attachment member 44 from the rear, and the upper frame between the front attachment member 44 and the rear attachment member 45 is divided. Since the part 34 is configured to be held, the hanger 41 can be easily attached without interfering with the front mesh ground 38 by screwing the assembled chair from behind. It is possible.

  Further, since the mounting member 43 and the holding member 46 are configured so that the position at which the support rod 42 is held can be changed, the height of the hanger 41 can be easily adjusted.

  Further, since the upper frame portion 34 is formed to have a larger size in the front-rear direction than the vertical size, the design can be further improved by taking advantage of the point that the back frame 31 and the mesh ground 38 constitute the back 3. In addition, it is possible to further increase the stability when the attachment member 43 is attached to the upper frame portion 34.

  In addition, since the positioning portion 48 for positioning in the left-right direction is configured between the mounting member 43 and the upper frame portion 34, the position of the hanger 41 is appropriately shifted without shifting the position of the hanger 41 in the left-right direction. Installation is possible.

  The mounting member 43 is provided with an engaging pin 45w extending in the front-rear direction, and the holding member 46 is provided with a receiving portion 46w as a receiving portion for slidably receiving the engaging pin 45w. An opening 46w1 as a recess provided in the portion 46w, and a locking claw 45w1 provided in the engagement pin 45w and accommodated in the opening 46w1, and the attachment member 43 from the state in which the support rod 42 is held. When the holding member 46 is relatively moved, the locking claw 45w1 is locked by the opening edge 46w2 of the opening 46w1 as the peripheral edge of the recess so that the position of the mounting member 43 and the holding member 46 is regulated. Since it is configured, it is possible to easily adjust the position of the hanger 41 by moving the support rod 42 up and down without removing the holding member 46 from the attachment member 43.

  The specific configuration of each unit is not limited to the above-described embodiment.

  For example, in the above-described embodiment, the configuration in which the hanger 41 is attached to the upper frame portion 34 of the back frame as an optional member is shown, but other optional members such as a headrest 51 as shown in FIG. It is also possible to attach.

  Further, in the above embodiment, the hanger 41 and the support rod 42 are integrally formed, but it may be configured to be detachable. In this case, the hanger 41 can be removed while only the support rod 42 is attached to the spine 3. In this state, a hanger having a different shape can be attached, or a headrest other than the hanger can be attached. Furthermore, it is conceivable that the support rod 42 is constituted by a single flat plate instead of being constituted by the two rods 42a and 42a and the connecting portion 42b.

  Further, in the above-described embodiment, the option member is configured to be attached to the upper frame portion 34. However, the option member is not necessarily attached to the upper frame portion 34. It is good also as a structure which newly provides a horizontal reed in the center part of the reed 33, and attaches an optional member to the said reed.

  Further, the attachment member 43 and the holding member 46 for attaching the optional member are fixed by the fastening screws 47, 47. However, if the fixing is not removed by using the optional member, the fastening screw 47 is not used. It is good also as a structure fixed by another means, such as a magnet.

  In the above-described embodiment, the positioning portion 48 is configured by the protrusion 44p of the front mounting member 44 and the corresponding cutout 45p on the upper frame portion 34 side. The present invention is not limited to this configuration, and other methods such as providing a display indicating an appropriate mounting position on the mounting member 43 and the upper frame portion 34 can also be applied.

  In addition, in the above-described embodiment, the attachment member 45 is provided with the engaging pin 45w and the holding member 46 is provided with the receiving portion 46w. On the contrary, the receiving member 46w is provided on the mounting member 45. It is also possible to provide the engaging pin 45 w on the holding member 46. Further, the engaging claw 45w1 of the engaging pin 45w is accommodated in the rectangular opening 46w1 provided in the receiving portion 46w. However, the opening 46w does not have to be rectangular, and is simply a no opening. It is also possible to configure so that the locking claw 45w1 is locked by the peripheral edge of the recess.

  Other configurations can be variously modified without departing from the spirit of the present invention.

31 ... Back frame 34 ... Upper frame (Bubo)
38 ... Mesh (tension)
41 ... Hanger (optional member)
42 ... support rod 44 ... front side attachment member 45 ... rear side attachment member 45w ... engagement pin 45w1 ... locking claw 45b ... latching part 46 ... holding member 46w ... receiving part 46w1 ... opening (concave part)
46w2 ... Opening edge (periphery)
48 ... Positioning part

Claims (6)

A chair having a back constituted by a back frame and a tension member stretched on the front surface of the back frame,
The back frame is provided with a reed extending in the left-right direction at the upper part thereof, and an attachment groove for attaching the tension material is formed on the upper surface of the reed at a position closer to the front than the center in the front-rear direction. ,
A support rod extending in the vertical direction to support the option member; an attachment member attached to the horizontal rod; and a holding member for holding the support rod between the attachment member,
The mounting member includes a latching portion that straddles the rear edge of the recumbent and extends from the lower surface along the upper surface, and is latched on the rear part of the recumbent by the retaining portion. A chair that is attached so as not to interfere with the upholstery material when sandwiching the rear edge and the front edge.   The mounting member is divided into a front mounting member and a rear mounting member that is screwed to the front mounting member from the rear, so that the recumbent is held between the front mounting member and the rear mounting member. The chair according to claim 1, wherein the chair is configured.   The chair according to claim 1 or 2, wherein the mounting member and the holding member are configured to change a position for holding the support rod.   The chair according to any one of claims 1 to 3, wherein the recumbent is formed so that a dimension in the front-rear direction is larger than a dimension in the vertical direction.   The chair according to any one of claims 1 to 4, wherein a positioning portion for positioning in the left-right direction is configured between the attachment member and the recumbent rod.   An engagement pin extending in the front-rear direction is provided on one of the attachment member and the holding member, and a receiving portion for slidably receiving the engagement pin is provided on the other of the attachment member and the holding member. And a recessed portion provided in the receiving portion, and a locking claw provided in the engaging pin and accommodated in the recessed portion. The position restriction between the mounting member and the holding member is performed by the locking claw being locked by a peripheral edge of the recess when the holding member is relatively moved. The chair in any one of 1-5.

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