JP2020039649A - Chair - Google Patents

Abstract

To provide a chair having a configuration where a cover member turning integrally with a work bench can smoothly rotate to leg bodies.SOLUTION: A chair includes: a leg body B; and a work bench C having a top plate R, and a supporting member S for supporting this top plate R and having a proximal end s1 pivotably attached to the leg body B. The chair is rotatably mounted and placed on the leg body B rotatably, and is positioned between the leg body B and a seated person support A. A synthetic resin cover member D for covering the proximal end s1 of the supporting member S and capable of integrally turning in conjunction with the turning of the supporting member S is arranged. The cover member D constitutes a turning range regulatory mechanism E associated with the seated person support A and regulating a turning range of the work bench to the seated person support A.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a chair.

  2. Description of the Related Art Conventionally, various chairs that are suitably used in offices and the like are known (for example, see Patent Literature 1).

  Some chairs of this type have a work table in which a top plate is supported by a support member made of a metal frame. In some cases, such a worktable is pivotally supported on a leg, and a base end of the worktable associated with the leg is covered with a cover material. However, the conventional chair does not always have a structure in which the cover member can be smoothly rotated with respect to the leg, and furthermore, a collision sound caused by the cover member hitting a constituent member of the leg or the seat, Collision noises and the like due to the contact between the receiver and the leg are likely to occur.

JP 2012-95931 A

  The present invention has been made in view of the above circumstances, and provides a chair having a configuration in which at least a cover member that rotates integrally with a worktable can smoothly rotate with respect to a leg. Is to do.

  That is, the present invention has the following configuration.

  According to a first aspect of the present invention, there is provided a worktable having a leg, a top plate, and a support member that supports the top plate and has a base end pivotally attached to the leg body, and a seating surface. A chair comprising: a seat support supporting rotatably with respect to the leg, the chair being rotatably mounted on the leg, and supporting the leg and the seat support. A cover member made of a synthetic resin that is located between the body and covers a base end of the support member and that can integrally rotate in conjunction with the rotation of the support member. A chair in which a cover member is engaged with the occupant support and constitutes a swivel range regulating mechanism that regulates a swivel range of the worktable with respect to the occupant support.

  The invention according to claim 2, wherein the support member includes the base end portion, and a support arm extending outward from the base end portion and capable of supporting the top plate at a front end portion, The base end of the support member is a cylindrical one attached to the outside of the support shaft of the leg, and the cover member can cover the outside of the base end and the vicinity of the base end. 2. The chair according to claim 1, further comprising an engagement recess for engaging the support arm.

  According to a third aspect of the present invention, the turning range regulating mechanism may be configured such that the engaging projection provided on one of the cover member and the occupant support and the engaging projection provided on the other are in contact with each other. 3. The chair according to claim 1, further comprising a joint wall.

  According to a fourth aspect of the present invention, the cover member is provided with the engagement wall, and the occupant support is provided with the engagement protrusion, and the cover member is recessed downward. 4. The chair according to claim 3, further comprising a recess in which a movable space for the engaging projection is formed, wherein the engaging wall is provided at an end of the recess.

  According to a fifth aspect of the present invention, there is provided a seating structure in which the occupant support comprises a seat component constituting a seat, a backrest component constituting a backrest, and an armrest on one side closer to the top plate. A support main body having elements formed integrally therewith, and a seat mounted on a lower surface of the support main body, wherein the seat protrudes downward. The chair according to claim 3 or 4, further comprising a mating projection.

  The invention according to claim 6 is the chair according to claim 5, wherein the seat support includes a positioning wall that protrudes downward in a partially annular shape and can engage with an inner surface of an outer wall of the cover member.

  The invention according to claim 7 is the chair according to claim 1, 2, 3, 4, 5, or 6, wherein a constituent member of the occupant support that can be engaged with the cover member is made of a synthetic resin. is there.

  In the invention described in claim 8, the cover member has a bottom wall, and a projection provided on a lower surface of the bottom wall is brought into contact with the leg. A chair according to 4, 5, 6, or 7.

  As described above, according to the present invention, it is possible to provide a chair having a configuration in which a cover member that rotates integrally with a worktable can smoothly rotate with respect to a leg.

FIG. 1 is a perspective view showing an embodiment of the present invention. The perspective view in the embodiment. The front view in the embodiment. The rear view in the embodiment. The right view in the embodiment. The left view in the embodiment. The top view in the embodiment. The bottom view in the embodiment. FIG. 4 is a partial sectional view taken along line XX in FIG. 3. FIG. 4 is a partial sectional view taken along line YY in FIG. 3. FIG. 11 is a partial sectional view corresponding to FIG. 10 for explaining operation. The perspective view in the embodiment. The exploded perspective view in the embodiment. The exploded perspective view in the embodiment. FIG. 4 is a plan view for explaining the operation in the embodiment. FIG. 4 is a plan view for explaining the operation in the embodiment.

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

  In this embodiment, the present invention is applied to a chair suitably used in an office or a conference room.

  The chair has a seated person support A having a seating surface f11 and a backrest surface f21, a leg B capable of supporting the seated person supporting A rotatably 360 °, and a swivel 360 ° with respect to the leg B. And a cover member D that covers the base end s1 of the work table C connected to the leg B and that can rotate integrally with the rotation of the work table C; A rotation range restricting mechanism E is provided between A and the cover member D and restricts the rotation range of the worktable C with respect to the occupant support A.

  Hereinafter, each configuration of the chair will be described in detail.

<Seat supporter A>
The occupant support body A has a seat surface f11 on the upper surface side, and a seat component f1 which constitutes a seat on which a occupant can sit. A backrest component f2 having f21 and constituting a backrest against which a seated person's waist and back can lean, and a left side end (left side when viewed from the front; the same applies hereinafter) of the seat component f1. The support body F includes an erect side wall f31 and an armrest component f3 having an armrest f32 provided at the upper end of the side wall f31. Further, the occupant support A includes a seat G mounted on the lower surface of the support body F, and a hook H provided on the outer surface side of the side wall f31 in the armrest component f3.

  In this embodiment, the seat is constituted by the seat support G and the seat component f1, the backrest is constituted by the backrest component f2, and the armrest is constituted by the armrest component f3.

  The support body F has a shell shape as a whole. That is, in the support body F, an armrest component f3 including a plate-shaped seat component f1, a plate-shaped backrest component f2, and a plate-shaped side wall f31 is integrally formed of synthetic resin. Have been. The rear end of the side wall f31 in the armrest component f3 is configured to be connected to the left side end of the backrest component f2. In the support body F, the seat component f1, the backrest component f2, and the armrest component f3 are integrally formed of synthetic resin, and the connecting portions of the components f1, f2, and f3 are curved and smooth. To form an outer shell having excellent rigidity as a whole. A recess hk that is recessed downward is formed between the backrest component f2 and the armrest f32 of the armrest component f3.

  The support body F is provided with the armrest component f3 only on the right side (only the left side in front view) as viewed from the seated person. In other words, the support body F is a one-elbow shell structure in which an elbow pad f32 that can be used by a seated person only on one side appears. On the other hand, the support body F does not have a side wall or an elbow pad on the upper side of the other side end of the seat component f1, and instead has a movement allowance that allows a movement of the occupant during the in / out operation. An area sp is provided. In other words, the support body F, which is a single-elbow shell structure, has an elbow pad f32 that can support one arm of the occupant from below so as to ensure the comfort of the occupant when the occupant is seated. On the opposite side of the contact f32, a movement allowable area sp is arranged.

  Here, the “in / out operation” refers to an operation of a seated person trying to sit from a position away from the chair and an operation of a seated person trying to move to a position away from the chair from the sitting position. The movement permissible area sp moves the buttocks and waist of the seated person in a substantially horizontal direction from the space above the seat component f1 where the buttocks and waist of the seated person are located toward the left side (right side in front view) as viewed from the seated person. It is set so that it can be moved.

  The armrest component f3 is integrally provided with an armrest f32 at the upper end of a side wall f31 extending in the vertical direction. The armrest component f3 is provided only on the right side (only the left side in front view) when viewed from the seated person. On the upper outer surface of the side wall f31, a protrusion ts for attaching the hook H is provided to protrude outward. The elbow pad f32 has a shape that is warped so as to be positioned gradually outward toward the top in front and rear views. That is, the elbow pad f32 is a plate-like member that is curved outward in a partial arc shape. The elbow rest f32 is configured such that an inner surface facing the seated person side, that is, an inner surface facing obliquely upward is an elbow rest surface ha against which the seated person's elbow and forearm can be brought into contact. The armrest component f3 can appropriately support the right arm of the seated person.

  The seat support G is made of a synthetic resin mounted on the lower surface of the seat component f1 of the support body F having a shell shape. The seat G has a seat main body g1, first and second engagement protrusions e3 and e4 protruding downward from the seat main body g1, and an annular shape from the seat main body g1 downward. And a projecting annular projection g2.

  The seat receiving body g1 has a form capable of holding the seat component f1 from below. The seat receiving body g1 is provided with screw insertion holes u2 at four positions on the peripheral edge thereof, through which screws v2 that penetrate vertically and are screwed to the support body F are inserted. The seat receiving body g1 is provided with a support shaft fitting hole g11 in the center of the lower surface side, in which the upper end of the support shaft L constituting the leg B is fitted.

  The first and second engagement projections e3 and e4 are provided to protrude downward from the seat receiving body g1. In this embodiment, the two engagement protrusions e3 and e4, that is, the first engagement protrusion e3 located on the front side, and the second engagement protrusion e4 located on the rear side of the first engagement protrusion e3 include: Is provided. The first and second engagement projections e3 and e4 are located on the inner edge side of the annular projection g2 projecting downward from the seat receiving body g1.

The work table C is seated mainly on the engagement protrusions e3 and e4 provided on the seat supporter A and the engagement walls e1 and e2 provided on the cover member D and to which the engagement protrusions e3 and e4 can abut. A turning range restricting mechanism E for restricting a turning range with respect to the person support A is configured (details will be described later).
The annular projection g2 is arranged so as to surround the support shaft fitting hole g11 in the seat receiving body g1. The outer exposed surface g21 that is the outer surface of the annular projecting portion g2 is configured to be substantially flush with an outer exposed surface d11 that is the outer surface of the cover member D described later. In addition, a positioning wall g22 is provided at the lower end of the annular projecting portion g2 so as to protrude downward in a partially annular shape and is disposed inside the upper portion of the outer wall d1 of the cover member D.

  The hook H is attached to the occupant support A. The hook H is configured to be able to hook a handle portion of luggage such as a bag or a bag. The hook H is provided on the outer surface of the side wall f31 of the armrest component f3 of the support body F for hanging a load. That is, the hook H is provided on the outer surface of the side wall f31 disposed on the right side as viewed from the seated person. That is, the hook H is provided at a position where the occupant can easily hook the baggage held in the right hand in the seated state.

  The hook H has an L-shape suitable for hooking an article in a front view and a rear view. The hook H has a horizontally long shape when viewed from the left side. The hook H includes a rectangular block-shaped base h1 having a screw insertion hole u1 formed on the lower surface side, an upper extending wall h2 extending upward from an outer upper end of the base h1, and an outer front and rear end of the base h1. And a front-rear extension wall h3 extending in the front-rear direction. The base body h1 of the hook H has a form in which a protrusion ts protruding from the side wall f31 of the armrest component f3 can be fitted. A nut (not shown) is accommodated in the protrusion ts of the support body F. Then, in a state where the base body h1 of the hook H is externally fitted to the protruding portion ts, the hook H is attached to the support body F by screwing the screw v1 inserted through the screw insertion hole u1 from below into the nut. I can do it.

  Note that the screw insertion hole u1 formed in the base h1 of the hook H may be a long hole extending in the left-right direction, and the mounting position with respect to the protrusion ts may be configured to be changeable. With such a configuration, for example, even when the upholstery is provided on the surface of the support body F, the hookable area of the hook H can be appropriately secured without being disturbed by the thickness of the upholstery. Become.

  An elbow pad f32 having a form warped outward is located above the base h1 of the hook H. For this reason, when the hook H is used, a part of the luggage (for example, a handle portion or the like) which is to be located on the base h1 of the hook H is moved upward by the outer surface of the elbow pad f32 forming a valgus shape. Is suppressed. In other words, the hook H is configured to cooperate with the armrest component f3 so that the load hung on the hook H is unlikely to drop.

<Leg B>
The leg B includes a plurality of, ie, four casters I, a plurality of, ie, four, leg frames J that hold each caster I at the distal end, and a base member, which is a single member and is a base end of the leg frame J. a metal leg support K to which j2 is fixed; a support shaft L for connecting the leg support K and the occupant support A so as to be relatively rotatable relative to each other; A cover member M for covering the portion j2 from the outside and rotatably supporting the cover member D at the upper end portion; a support shaft cover member N for covering the upper portion of the support shaft L from the outside; And a receiving member P on which the base end s1 of the worktable C is externally provided.

  The leg frame J is made of metal and arranged radially in plan view. The leg frame J is formed of a metal pipe material. The leg frame J has an inclined frame portion j1 that is inclined so as to be gradually positioned downward as it goes outward, and a base end portion, that is, a base end frame portion j2 that extends upward from the upper end of the inclined frame portion j1. And a front end portion extending downward from the lower end of the inclined frame portion j1, that is, a front end frame portion j3. The caster I is attached to the front end frame part j3.

  The leg receiver K is made of metal and has a downwardly convex shape in a side view. The leg receiver K includes a tubular member k1 extending in the vertical direction, and a flange member k2 integrally extending outward from the upper end of the tubular member k1.

  The tubular member k1 has a cylindrical shape. The outer surface of the base frame portion j2 of the leg frame J is welded to the outer surface of the tubular member k1. That is, the base end frame portions j2 of the plurality of leg frames J are welded to the outer peripheral surface of the cylindrical member k1 at substantially equal intervals using a jig or the like.

  The flange member k2 is a plate-shaped member having a donut shape in a plan view and a bottom view. The upper end of the base frame portion j2 of the leg frame J is welded to the lower surface of the flange member k2.

  In FIG. 14, the outer peripheral surface and the upper end portion of the base frame portion j2 of the leg frame J are welded to the joint portion of the leg receiving body K (the outer peripheral surface of the cylindrical member k1 and the flange member k2). (Lower surface) is shaded.

  On the flange member k2, the base end s1 of the support member S constituting the worktable C is disposed. More specifically, a flange portion n2 of the spindle cover member N is mounted on the flange member k2 of the leg receiving member K, and a receiving member P is mounted on the flange portion n2 of the spindle cover member N. Extension part p2 is mounted. The base end s1 of the support member S is disposed on the extension p2 of the receiving member P.

  The support shaft L is disposed in an upright posture in the internal space of the tubular member k1. The upper end of the support shaft L is fitted in the support shaft fitting hole g11 of the seated person support A. The support shaft L has a configuration capable of supporting the occupant support A so as to be rotatable relative to the leg B, but has a known configuration, and a detailed description thereof will be omitted.

  The covering member M is a cylindrical member having a diameter larger than the cylindrical member k1 of the leg receiver K. The covering member M is made of metal, and the inner peripheral surface and the outer edge of the flange member k2 are welded. The upper end of the covering member M is set so as to be located higher than the flange member k2 having a horizontal posture. In other words, an upper protruding portion m1 that protrudes upward with respect to the flange member k2 is provided at the upper end of the covering member M. A downward surface d31 formed on the outer edge of the bottom wall d3 of the cover member D is in contact with or close to the upper edge of the upper protruding portion m1, and is located inside the upper protruding portion m1 and above the flange member k2. An annular positioning portion d32 formed at the lower end of the member D can be located. The outer surface of the cover member M is configured to smoothly continue with the outer exposed surface d11 of the cover member D.

  The spindle cover member N has an upwardly convex shape in a side view. The support shaft cover member N is attached to a flange member k2 of the leg support K by a screw v3. The spindle cover member N includes a cover body n1 having a cylindrical shape, and a flange portion n2 extending outward from a lower edge of the cover body n1. The flange portion n2 is provided with a screw insertion hole u3 through which a screw v3 for attaching to the leg receiver K can be inserted.

  The receiving member P is interposed between the spindle cover member N and the base end s1 of the worktable C. The receiving member P is for turning the worktable C smoothly with respect to the leg B. The receiving member P has an upwardly convex shape in a side view. The receiving member P includes a cylindrical receiving member main body p1 and an extension p2 extending outward from a lower edge of the receiving member main body p1. The receiving member main body p1 is mounted so as to be relatively rotatable with respect to the cover main body n1 of the spindle cover member N. The extension part p2 of the receiving member P is mounted on the collar part n2 of the spindle cover member N so as to be relatively rotatable. The cover member D is placed on the extension p2 of the receiving member P.

<Working table C>
The work table C has a top plate R that can be located on the front side of the occupant support A. The work table C can place various articles used by the occupant on the top plate R. The occupant can use the article placed on the top plate R while sitting on the occupant support A.

  The worktable C is configured to be able to turn within a certain turning range with respect to the occupant support A. That is, as shown in FIG. 15, the work table C includes a front position (f) in which the top plate R is positioned on the front side of the occupant support A, and a side wall of the occupant support A more than the front position (f). It is configured to be able to pivot with respect to the occupant support A between the retracted position (s) where the top plate R is located on the f31 side, that is, the armrest component f3 side. The top plate R of the worktable C is provided on the right side (left side in front view) when viewed from a seated person. For this reason, the seated person can appropriately execute work such as writing.

  The work table C includes a top plate R formed in a substantially rectangular shape in a plan view, a support member S that supports the top plate R and has a base end s1 pivotally mounted on the leg B, A top plate support mechanism T is provided between the support member S and the support member S and can rotatably support the top plate R within a certain range with respect to the support member S.

  The top plate R mainly includes a substantially rectangular plate-shaped synthetic resin base plate r1 and a synthetic resin upper plate r2 mounted on the base plate r1.

  The top plate R is provided with a ring-shaped recessed drink holder r3 at a corner near the non-use edge. In addition, the top plate R is provided with a smartphone stand r4 near the non-use edge along the anti-use edge.

  The drink holder r3 can mainly hold a drink (not shown) contained in a cup or a plastic bottle, and has a peripheral wall r31 and a bottom wall r32. The bottom wall r32 of the drink holder r3 is provided with a plurality of communication holes r33 that communicate with each other in a vertical direction so as to suppress drainage and dust volume. The smartphone stand r4 includes a concave portion r41 that supports the lower end of the smartphone (not shown) so as to be difficult to move in the front-rear direction, and a raised portion r42 that supports the rear surface of the smartphone from behind. The peripheral wall r31 and the bottom wall r32 forming the drink holder r3, and the concave portion r41 and the raised portion r42 forming the smartphone stand r4 are formed on the upper plate r2. The base plate r1 is provided with a through hole r11 through which the drink holder r3 can pass.

  The support member S is made of a metal provided between the top plate R and the leg B. The support member S includes a base end s1 rotatably mounted on the leg B, and a support arm s2 extending outward from the base end s1 and capable of supporting the top plate R at a distal end. I have. The support member S is disposed at a position eccentric toward the side wall f31 in front view, that is, biased toward the armrest component f3.

  The base end s1 of the support member S is a cylindrical member mounted outside the support shaft L of the leg B. The base end portion s1 of the support member S is externally fitted to a receiving member P arranged on the outer periphery of the support shaft L, and is directly engaged with the receiving member P.

  The support arm s2 includes a lower arm portion s21 extending substantially horizontally outward from the base end portion s1, an intermediate arm portion s22 extending upward from a distal end portion of the lower arm portion s21, An upper arm portion s23 extending substantially inward from the distal end portion of the intermediate arm portion s22 in a substantially horizontal direction is provided.

  The top plate R is also rotatably supported by the support member S. That is, in this chair, not only the entire worktable C is supported rotatably with respect to the leg B, but also the top plate R forming the worktable C is supported by the support member S which also forms the worktable C. It is configured to be rotatable with respect to this. In this embodiment, the top plate R is configured to be rotatable only in the horizontal direction with respect to the support member S via the top plate support mechanism T.

  The top support mechanism T is interposed between the top R and the support member S. The top support mechanism T is supported by an arm holding member t1 mounted on the upper arm portion s23 of the support arm s2, and is rotatably supported within a certain range with respect to the arm holding member t1. The top plate holding plate t2 attached to the lower surface of r1 is mainly configured. As shown in FIG. 16, the top plate holding plate t2 is configured to be rotatable with respect to the arm holding member t1. That is, the top plate holding plate t2 rotates within a predetermined range with respect to the arm holding member t1, and the top plate R that can rotate integrally with the top plate holding plate t2 is moved to the normal posture (t) and the retracted posture (u). ).

<Cover member D>
The cover member D is made of a synthetic resin having a donut shape in a plan view and a bottom view. The cover member D is rotatably mounted on the leg B, and is located between the leg B and the occupant support A. The cover member D covers the base end s1 of the support member S and can rotate integrally with the support member S in conjunction with the rotation of the support member S.

The cover member D constitutes a turning range restricting mechanism E that engages with the occupant support A and restricts the turning range of the worktable C with respect to the occupant support A. That is, the first and second engagement walls e1 and e2 provided on the cover member D and the first and second engagement walls e1 and e2 provided on the occupant support body A can be in contact with each other. A turning range restricting mechanism E for restricting a turning range of the worktable C with respect to the occupant support A is constituted mainly by the second engagement protrusions e3 and e4 (details will be described later).
The cover member D includes a cylindrical outer wall d1, a cylindrical inner wall d2 having a smaller diameter than the outer wall d1, and a bottom wall d3 connecting between the lower ends of the outer wall d1 and the inner wall d2. The outer wall d1, the inner wall d2, and the bottom wall d3 are connected by a plurality of reinforcing ribs d4.

  The outer wall d1 has an outer exposed surface d11 visually recognized from the outside. On the inner peripheral surface of the inner wall d2, a plurality of ribs d21 extending in the vertical direction are provided in the circumferential direction at intervals. The bottom wall d3 has a partially annular shape, and a lower surface d31 in which the upper edge of the covering member M of the leg B is in contact with or close to the lower wall d3. And a positioning portion d32 that can be engaged with or come close to the inner surface of the covering member M.

  Further, the bottom wall d3 is provided with a sliding contact convex portion d33, which is a convex portion, which is formed in a partial annular shape and directly contacts the extending portion p2 of the receiving member P, and projects downward. Since the sliding contact convex portion d33 comes into direct contact (point contact) with a relatively small area on the upper surface of the extending portion p2 of the receiving member P constituting the leg B, it comes into contact with the leg B. And can rotate smoothly.

  The cover member D has a shape capable of covering the outside of the base end s1 of the support member S. The cover member D includes an engagement recess d5 that engages with the lower arm portion s21 of the support arm s2 located near the cylindrical base end s1. The engaging recess d5 has a form in which a part of the cover member D is cut out, that is, a form in which a part of the outer wall d1, the inner wall d2, and the bottom wall d3 is cut out. The engagement concave portion d5 has a concave shape opened downward. The engagement recess d5 is configured to be able to engage with a portion of the lower arm portion s21 near the base end s1.

  The cover member D is recessed downward and has first and second recesses d6 and d7 in which movable spaces for the first and second engagement protrusions e3 and e4 provided on the seat support G are formed. It has. The first and second recesses d6 and d7 are formed by an outer wall d1, an inner wall d2, and a bottom wall d3, respectively. The first and second recesses d6 and d7 are provided at two locations corresponding to the two engagement projections e3 and e4 provided on the seat support G, that is, the first and second engagement projections e3 and e4. ing. In this embodiment, the first and second recesses d6 and d7, which are two recesses, are arranged on both sides of the first and second recesses d6 and d7. The first and second engagement protrusions e3 and e4 can be in contact with the ends of the first and second recesses d6 and d7 closer to the engagement recess d5, respectively. Walls e1 and e2 are provided. The first and second engagement walls e1 and e2 are formed by walls forming an engagement recess d5.

<Rotation range restriction mechanism E>
The turning range regulating mechanism E is provided between the occupant support A and the cover member D. The turning range restricting mechanism E can restrict the turning range of the entire worktable C with respect to the occupant support A. In this embodiment, the turning range regulating mechanism E includes a first recess d6 provided on the cover member D and having a first engagement wall e1 at one end, and a second recess d6 provided on the cover member D at one end. A second recess d7 having an engaging wall e2, a first engaging projection e3 provided on the seat G of the occupant support A and capable of engaging with the first engaging wall e1, A second engaging projection e4 that can engage with the second engaging wall e2.

  The worktable C is, as shown in FIG. 15, a front position (f) in which the top plate R is positioned in front of the occupant support A, and a side f31 of the occupant support A closer to the front position (f). That is, it is configured to be able to pivot with respect to the occupant support A between a retracted position (s) where the top plate R is located on the armrest component f3 side provided only on one side. The front position (f) and the retreat position (s) of the worktable C are defined by the turning range regulating mechanism E.

  When the worktable C is at the front position (f), as shown in FIG. 10, one side of the seat G, ie, the first engagement protrusion e3 located on the front side, is provided with the one side recess. That is, the first engaging wall e1 provided at a position near the engaging concave portion d5 in the first concave portion d6 located on the front side comes into contact with the first concave portion d6. Therefore, even if the worktable C at the front position (f) is to be further rotated forward, the first engagement wall e1 of the cover member D is engaged with the first engagement protrusion e3 of the seat support G. However, further rotation is prevented.

  When the worktable C is at the rear position, as shown in FIG. 11, the other engaging projection e4 of the seat G, that is, the second engaging projection e4 located on the rear side, is provided with the recess d7 on the other side. That is, the second engagement wall e2 provided at a position near the engagement recess d5 in the second recess d7 located on the rear side comes into contact with the second recess d7. For this reason, even if the work table C at the rear position is to be further rotated backward, the second engagement wall e2 of the cover member D is engaged with the second engagement projection e4 of the seat G, and The above rotation is prevented.

  The chair includes a occupant support A and a leg B capable of rotatably supporting the occupant support A. Then, the occupant support body A includes a seat component f1, which constitutes a seat, a backrest component f2, which is erected from the rear end of the seat component f1, and which constitutes a backrest; It has a side wall f31 erected from only one of the side ends, and a shell-shaped support body F in which the seat component f1 and the side wall f31 are integrally formed of synthetic resin. With such a chair, the occupant can easily move in and out of the front and side directions. The chair includes a work table C having a leg B, a top plate R, and a support member S that supports the top plate R and has a base end s1 pivotally mounted on the leg B. A seat support A having a surface f11 and rotatably supported by the leg B; And it is rotatably mounted on the leg B and is located between the leg B and the occupant support A, and covers the base end s1 of the support member S to allow the support member S to rotate. A cover member D made of a synthetic resin, which can rotate integrally with the cover, is provided. The cover member D constitutes a turning range restricting mechanism E that engages with the occupant support A and restricts the turning range of the worktable C with respect to the occupant support A. In such a chair, the cover member D has not only the function of covering the base end s1 of the worktable C but also the function of restricting the turning range of the worktable C with respect to the occupant support A, thereby contributing to the suppression of the number of parts. It has become something. This chair includes a leg B and a seated person support A having a seating surface f11 and supported by the leg B. The leg B includes a plurality of leg frames J made of metal and arranged radially in a plan view, and a metal leg receiver K to which the base end s1 of the leg frame J is fixed. ing. The leg receiving body K includes a cylindrical member k1 extending in the vertical direction, and the outer surface of the base end frame portion j2 of the leg frame J is welded to the outer surface of the cylindrical member k1. In such a chair, the outer surface of the base end frame portion j2 of the leg frame J is welded to the outer surface of the cylindrical member k1 that forms the leg receiving body K and has a structure with excellent rigidity. It is easy to increase the number of welding points and has excellent welding strength.

  As described above, the chair according to this embodiment includes the leg B, the top plate R, and the support member S that supports the top plate R and has the base end s1 pivotally mounted on the leg B. And a seating support A having a seating surface f11 and rotatably supported by the leg B. And it is rotatably mounted on the leg B and is located between the leg B and the occupant support A, and covers the base end s1 of the support member S to allow the support member S to rotate. A cover member D made of synthetic resin, which can rotate integrally with the cover, is provided. The cover member D constitutes a turning range restricting mechanism E that engages with the occupant support A and restricts the turning range of the worktable C with respect to the occupant support A. Therefore, it is possible to provide a chair having a configuration in which the cover member D that rotates integrally with the worktable C can rotate smoothly with respect to the leg B. That is, the cover member D made of a synthetic resin is configured to be rotatably mounted on the leg B, and is located between the leg B and the occupant support A. For this reason, the cover member D is configured to be able to smoothly rotate on the leg B, and is interposed between the rigid leg B and the occupant support A so that the cover B The sound of collision with the occupant support A can be preferably avoided. That is, the chair of the present embodiment is excellent in quietness even though the worktable C is supported on the leg B.

  The support member S includes a base end s1 and a support arm s2 extending outward from the base end s1 and capable of supporting the top plate R at a front end. The base end s1 of the support member S is a cylindrical member mounted outside the support shaft L of the leg B, and the cover member D can cover the outside of the base end s1 and the vicinity of the base end s1. And an engagement recess d5 that engages with the support arm s2. For this reason, the base end s1 of the support member S is suitably covered with the cover member D. Further, the engaging concave portion d5 of the cover member D engages with the support arm s2 of the support member S. For this reason, the cover member D can rotate integrally with the turning operation of the worktable C.

  The first and second engagement protrusions e3 and e4 provided on the seat supporter A and the engagement protrusions e3 and e4 provided on the cover member D can be brought into contact with the turning range regulating mechanism E. And the engaging walls e1 and e2. For this reason, the rotation range of the worktable C with respect to the occupant support A can be suitably set by cooperation of the occupant support A and the cover member D.

  The cover member D is provided with first and second recesses d6 and d7 that are recessed downward to form movable spaces for the first and second engagement protrusions e3 and e4. The first and second engagement walls e1 and e2 are provided at one end of the first and second recesses d6 and d7. For this reason, the cover member D has a suitable structure capable of engaging with the occupant support A and defining the turning range of the worktable C with respect to the occupant support A.

  The occupant support A has a seat component f1 forming a seat, a backrest component f2 forming a backrest, and an armrest component f3 forming an armrest on one side closer to the top plate R, and these are provided. It has a support body F formed integrally and a seat G mounted on the lower surface of the support body F. And the seat support G is provided with the 1st, 2nd engaging protrusion e3 and e4 which protruded downward. For this reason, the flexibility of forming the component of the turning range regulating mechanism E on the seat support G is increased, and the support body F has a high degree of freedom for forming a shell-shaped outer shape.

  The seat G is provided with a positioning wall g22 which projects downwardly in a partially annular shape and can engage with, that is, come into contact with or approach the inner surface of the outer wall d1 of the cover member D. For this reason, the positions of the seat support G and the cover member D are appropriately set, and a suitable appearance can be given to the user and the occupant.

  The constituent member of the occupant support A that can engage with the cover member D, that is, the seat support G is made of synthetic resin. For this reason, even when the cover member D and the seat G come into contact with each other, no metallic noise is generated, and the noise reduction and cushioning properties are excellent.

  The cover member D has a bottom wall d3, and a sliding contact protrusion d33, which is a protrusion provided on the lower surface of the bottom wall d3, is brought into contact with the leg B. For this reason, the cover member D can smoothly slide and rotate on the leg B.

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

  The shape of the leg may be any shape, and is not limited to the shape shown in the above-described embodiment.

  The occupant support may be in any form, and is not limited to those shown in the above-described embodiments.

  The turning range restricting mechanism may be any configuration as long as the cover member and the occupant support are appropriately engaged with each other, and are not limited to those described in the above-described embodiment. For example, the turning range regulating mechanism may be configured such that the cover member is provided with an engagement protrusion, and the occupant support is provided with an engagement wall with which the engagement protrusion provided on the cover member can abut.

  The form of the support member of the workbench can adopt an appropriate form, and is not limited to the above-described embodiment.

  The turning range of the worktable with respect to the occupant support can be set as appropriate, and is not limited to the above-described embodiment.

  The workbench top is not limited to the so-called uniaxial type that is configured to be rotatable only in the horizontal direction with respect to the support member, but is the so-called biaxial type that is configured to be rotatable in the horizontal and vertical directions. It may be something.

  The support body may not have an armrest component. The support main body may have at least a side wall that covers the vicinity of the buttocks on one side of the seated person.

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

A: occupant support B: leg C: work bench D: cover member E: turning range regulating mechanism

Claims (8)

A work table having a leg, a top plate, and a support member supporting the top plate and having a base end pivotally attached to the leg, and a seat having a seating surface; A chair comprising a rotatably supported occupant support,
The supporting member is rotatably mounted on the leg, and is located between the leg and the occupant support. The base covers the base end of the supporting member and is integrated with the turning of the supporting member. A cover member made of synthetic resin that can be rotated
A chair in which the cover member is engaged with the occupant support and constitutes a swivel range regulating mechanism that regulates a swivel range of the worktable with respect to the occupant support. The support member includes the base end portion, and a support arm extending outward from the base end portion and capable of supporting the top plate at a front end portion,
The base end of the support member is a cylindrical one attached to the outside of the support shaft of the leg,
The chair according to claim 1, wherein the cover member includes an engagement recess that covers the outside of the base end and engages the support arm near the base end. The said rotation range restriction mechanism is provided with the engagement protrusion provided in any one of the said cover member and the said occupant support, and the engagement wall provided in the other, and the said engagement protrusion can contact. The chair according to 1 or 2. The cover member is provided with the engagement wall, and the occupant support is provided with the engagement protrusion,
The said cover member is provided with the recessed part which became concave below and was formed the movable space of the said engagement protrusion, The said engagement wall is provided in the edge part of the recessed part. The described chair. The occupant support has a seat component constituting a seat, a backrest component constituting a backrest, and an armrest component constituting an armrest on one side closer to the top plate, and these are integrally formed. And a seat body mounted on the lower surface of the support body,
The chair according to claim 3 or 4, wherein the seat support includes the engagement protrusion protruding downward. 6. The chair according to claim 5, wherein the seat support includes a positioning wall protruding downward in a partially annular shape and capable of engaging with an inner surface of an outer wall of the cover member. The chair according to claim 1, 2, 3, 4, 5, or 6, wherein a constituent member of the occupant support that can be engaged with the cover member is made of a synthetic resin. The said cover member has a bottom wall, The convex part provided in the lower surface of this bottom wall is contact | abutted to the said leg body. Chair.

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