JP5946262B2 - Chair - Google Patents

Description

  The present invention relates to a chair suitably used for school or office use.

  Conventionally, as a chair of this type, a chair body and a memo base formed by supporting the chair body through a holding mechanism on the chair body, the memo base body has a substantially horizontal plate surface. There is known one in which the use posture and the plate surface can take a storage posture that is substantially vertical (see, for example, Patent Document 1). In the chair described in Patent Document 1, the holding mechanism is configured so that the memo stand main body can be operated between the use posture and the retracted posture by using the rotation operation of the memo stand main body.

  By the way, in the chair described in Patent Document 1, the holding mechanism includes a structure that rotates around the central axis of the memo stand support frame with respect to the memo stand support frame of the chair body. A mechanism portion responsible for rotational movement is provided.

  If the frictional force when the memo stand main body is rotated is too small, the memo stand is not intended to be used even though it is desired to keep the plate surface of the memo stand in a substantially vertical position. When the surface moves to a horizontal posture, or when the memo stand takes the above-mentioned use posture, the memo stand jumps up due to a slight external action, and depending on the user, when rotating In some cases, the user may not feel the operation feeling. On the contrary, if the frictional force at the time of rotating the memo stand main body becomes too large, another problem that the memo stand main body is difficult to rotate may occur. In addition, the frictional force that makes it difficult for the memo stand to rotate is different for each user. Even if the frictional force is large enough to make it difficult for a user to feel the operational feeling when performing a rotating operation, or for a specific user to feel that the rotating operation is difficult, the friction for other users There is also a problem that the force is not large enough to make it difficult to rotate.

Utility Model Registration No. 3154256

  The present invention pays attention to the above points, and in a chair that can operate the memo stand main body between the use posture and the retracted posture by using the rotation operation, the user's preference when performing the rotation operation of the memo stand main body. It is an object to be able to obtain a corresponding operational feeling.

That is, the chair according to the present invention is a chair comprising a chair main body and a memo stand that supports the chair main body via a holding mechanism on the chair main body, and the holding mechanism is a memo base main body. A friction applying element configured to be able to operate the memo stand main body between the use posture and the retracted posture by using at least the rotational motion of the mechanism, and imparting frictional resistance to the rotational motion to the mechanism portion responsible for the rotational motion And a friction adjusting mechanism for acting on the friction applying element to set a rough magnitude of the frictional resistance of the rotational motion during assembly, and a fine adjustment of the magnitude of the frictional resistance in the assembled state. And an auxiliary friction adjusting mechanism for enabling adjustment .

  If it is such, by adjusting the magnitude | size of the frictional resistance of the said rotation operation | movement, the operation feeling at the time of performing a rotation operation | movement can be set according to a user's liking.

Moreover, if it is such, it can respond | correspond suitably to the aspect which sets the rough magnitude | size of the frictional resistance of the said rotational motion at the time of assembly of a chair, and performs fine adjustment of the said frictional resistance after completion of assembly of a chair .
The invention according to claim 2 is the chair according to claim 1, wherein the friction adjustment mechanism is provided in a state in which an adjustment operation is impossible when the assembly is completed.

  In addition, as an example of a specific configuration for providing such a friction adjustment mechanism, the memo stand main body is configured to reach a retracted posture from a use posture through a standing posture, and the holding mechanism A first structural body that rotates about a first axis with respect to a chair main body in order to shift the memo stand main body from a use posture to a standing posture, and the memo stand main body And a second structure that rotates about a second axis with respect to the first structure in order to shift the standing posture from the standing posture to the retracted posture, and the friction applying element and the friction adjustment A mechanism is provided between the chair body and the first structure.

  As a configuration for easily realizing the friction applying element and the friction adjusting mechanism as described above with a small number of parts, the first structure includes a bracket for storing the memo stand support frame of the chair body, and the bracket. A base on which the memo stand support frame is positioned, and the friction applying element and the friction adjusting mechanism can be screwed back and forth with respect to the female screw hole provided in the base and the female screw hole. What forms is formed using the external thread member which presses a base support frame toward the said bracket.

  Further, as a configuration for preventing the frictional force of the rotational operation from being changed suddenly in the aspect as described in the preceding stage, the male screw member of the friction adjustment mechanism is covered with the second structure in the assembled state. Can be mentioned.

  On the other hand, in order to provide an auxiliary friction adjustment mechanism in a mode in which a rough magnitude of the frictional resistance of the rotational motion is set at the time of assembling the chair as described above, and the frictional resistance is finely adjusted after the chair is assembled. As an example of a specific configuration of the above, the memo stand main body is configured so as to reach a retracted posture through a standing posture from a use posture, and a mechanism portion responsible for the rotation operation of the holding mechanism includes the memo stand main body. A first structure that rotates about a first axis relative to a chair body in order to shift the pedestal body from a use posture to a standing posture; and a transition of the memo base body from a standing posture to a retracted posture. And a second structure that rotates about a second axis with respect to the first structure, the first structure having a memo stand support frame of a chair body inside The bracket to be stored and this bracket And a base on which the memo stand support frame is positioned, and the auxiliary friction adjustment mechanism is provided between the bracket and the base of the first structure to change the distance between them. It is done.

  According to the present invention, in a chair capable of operating the memo stand main body between the use posture and the retracted posture using the rotation operation, the operation feeling according to the user's preference when performing the rotation operation of the memo stand main body. Can be obtained.

The perspective view which shows the chair which concerns on one Embodiment of this invention. The front view which shows the chair which concerns on the same embodiment. The side view which shows the chair which concerns on the same embodiment. The top view which shows the chair which concerns on the same embodiment. The side view which shows the state which has distribute | arranged the memo stand of the chair which concerns on the embodiment to the standing position. The side view which shows the state which has arrange | positioned the memo stand of the chair which concerns on the embodiment to the storage position. The side view which shows the memo stand support mechanism of the chair which concerns on the same embodiment. The disassembled perspective view which shows the memo stand support mechanism of the chair which concerns on the same embodiment. The disassembled perspective view which shows the memo stand support mechanism of the chair which concerns on the same embodiment. The center cross section which shows the principal part of the memo stand support mechanism of the chair which concerns on the same embodiment. The disassembled perspective view which shows the attachment aspect of the rail of the memo stand support mechanism of the chair which concerns on the same embodiment. The perspective view which shows the principal part of the memo stand support mechanism of the chair which concerns on the same embodiment. The figure which shows the nesting aspect of the chair which concerns on the same embodiment. Operation | movement explanatory drawing which shows the action | operation of the memo stand support mechanism of the chair which concerns on the same embodiment. Operation | movement explanatory drawing which shows the action | operation of the memo stand support mechanism of the chair which concerns on the same embodiment. Operation | movement explanatory drawing which shows the action | operation of the memo stand support mechanism of the chair which concerns on the same embodiment. Operation | movement explanatory drawing which shows the action | operation of the memo stand support mechanism of the chair which concerns on the same embodiment. Operation | movement explanatory drawing which shows the action | operation of the memo stand support mechanism of the chair which concerns on other embodiment of this invention. Operation | movement explanatory drawing which shows the action | operation of the memo stand support mechanism of the chair which concerns on the same embodiment. Operation | movement explanatory drawing which shows the action | operation of the memo stand support mechanism of the chair which concerns on the same embodiment. Operation | movement explanatory drawing which shows the action | operation of the memo stand support mechanism of the chair which concerns on the same 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 C capable of nesting in the horizontal direction. That is, as specifically shown in FIG. 13, the chair C according to the present embodiment holds the seat plate 3 in the flipped-up position (J) and holds the memo stand in the retracted posture (SS) when stored. By doing so, it is configured to be able to accommodate many chairs in a small space by being close to the other chair C ′ having the same structure in the front-rear direction. In FIG. 13, the reference numerals of the other chairs are “C ′”. However, the same reference numerals as those of the chairs C are given to the other chairs because they have the same structure.

  As shown in FIGS. 1 to 6, the chair C is configured by supporting a seat plate 3, a back plate 4, and a memo stand 5 on a chair body 1, and more specifically, a seat plate that supports the seat plate 3. The chair body 1 includes a support frame 26 and a memo stand support frame 28 that supports the memo stand 5. Further, the chair C is configured such that the seat plate 3 can be rotated between a use position (U) and a flip-up position (J) via a shaft 262 which is a shaft attachment portion of the seat plate support frame 26. The memo stand support frame 28 supports the memo stand movably between a use posture (UU) in which the plate surface is substantially horizontal and a storage posture (SS) in which the plate surface is substantially vertical. .

  Hereinafter, each structure of the chair C is explained in full detail.

  The chair body 1 is mainly composed of a metal pipe material. As shown in FIGS. 1 to 6, the chair body 1 includes a leg portion 2, a seat plate 3 supported by the leg portion 2, and a back plate 4 similarly supported by the leg portion 2. Yes.

  The leg 2 includes left and right front legs 21 having casters 211 at the lower ends, left and right rear legs 22 having casters 221 at the lower ends, and left and right front legs 21 connecting the upper ends of the rear legs 22 and the upper ends of the front legs 21, respectively. A side frame 24, a front frame 25 that is constructed between the vicinity of the front ends of the left and right side frames 24 and joins both side frames 24, and a side frame 24 that is installed between the vicinity of the rear ends of the left and right side frames 24. A rear frame 23 as a horizontal member to be coupled, a seat plate support frame 26 rotatably supported by the rear frame 23, left and right back frames 27 extending upward from the upper end of the rear leg 22, and the rear The frame 23 is provided with a memo stand support frame 28 which is fixedly attached to the frame 23 at a plurality of base end portions thereof by welding or the like.

  As shown in FIGS. 1 to 3, 5, and 6, the front leg 21 and the side frame 24 are integrally formed by bending a common metal pipe material. The upper end of the leg 22 is rigidly connected by welding or the like. Thus, the front leg 21, the rear leg 22, the side frame 24, the front frame 24, the rear frame 23, the seat plate support frame 26, and the back frame 27 receive the load of the seated person acting on the seat plate 3 and the back plate 4. It has the strength possible. And the seat board 3 is supported by the seat board support frame 26 which comprises the chair main body 1, for example, the use position (U) and seat which the seat board 3 becomes substantially parallel with respect to a floor surface as shown in FIG. The plate 3 can be rotated between a flip-up position (J) as shown in FIG. 13 where the plate 3 is substantially parallel to the back plate 4. Further, as shown in FIGS. 2, 4 and 13, the distance between the left and right front legs 21, that is, the width dimension is set smaller than the distance between the left and right rear legs 22, so that it will be described later. It is possible to nest with another chair C ′ having the same structure in a state where the seat plate 3 is flipped up.

  As shown in FIGS. 1 and 2, the front frame 25 is mainly composed of a straight metal pipe material that is laid between the front portions of the left and right side frames 24, and will be described later. The horizontal member 263 of the seat plate support frame 26 comes into contact with the upper surface of the front frame 25 at the use position (U). That is, the seat plate 3 is configured to be held at the use position (U) when the horizontal member 263 of the seat plate support frame 26 directly contacts the front frame 25.

  As shown in FIGS. 1 to 3, 5, and 6, the rear frame 23 is constructed between the left and right side frames 24, and includes a mounting bracket 232 at an intermediate portion thereof. A bearing portion 232a for rotatably supporting the shaft 262 of the seat plate support frame 26 is provided at the tip of the mounting bracket 232, and the shaft 262 is rotatably mounted between the left and right mounting brackets 232. Yes. The bearing portion 232a is configured mainly with a shaft hole. In other words, the chair C according to this embodiment has the mounting bracket 232 of the rear frame 23 rotatably supported the shaft 262 of the seat plate support frame 26, and is thereby supported by the seat plate support frame 26. The seat plate 3 is rotatable between the use position (U) and the flip-up position (J).

  Next, the seat plate support frame 26 that supports the seat plate 3 will be described.

  The seat plate support frame 26 includes a frame-shaped support frame main body 261, a shaft 262 provided at the rear end portion of the support frame main body 261, and a horizontal member provided at a middle portion in the front-rear direction of the support frame main body 261. 263.

  The support frame main body 261 has a frame shape similar to the outer edge shape of a baseball home base in a bottom view, and the upper surface of the support frame main body 261 has a seat plate as shown in FIGS. 3 directly abuts. In addition, a bracket (not shown) for attaching the seat plate 3 projects from the inner side surface of the support frame main body 261. And the rear-end part is connected with the intermediate part of the left-right direction of the axis | shaft 262 extended in a substantially straight line form in the left-right direction.

  The shaft 262 is mainly composed of a metal pipe material. As shown in FIGS. 3, 5, and 6, the left and right ends of the shaft 262 are rotatably supported by the mounting bracket 232 of the rear frame 23 via a bearing portion 232 a. Thus, the seat plate 3 supported by the support frame main body 261 of the seat plate support frame 26 is rotated between the use position (U) and the flip-up position (J) via the shaft 262 of the seat plate support frame 26. It can move.

  As shown in FIGS. 2, 3, 5, and 6, the horizontal member 263 is configured to be supported by the front frame 25 in the use position (U). In the use position (U), the horizontal member 263 has a shape in which a central portion protrudes downward in a front view. In other words, the horizontal member 263 includes a raised portion that protrudes downward in the front view at the use position (U). More specifically, the horizontal member 263 includes a horizontal member main body 263a having a raised portion r mainly composed of a metal pipe material, and an abutting member attached to an intermediate portion in the horizontal direction of the horizontal member main body 263a. 263b is provided. The horizontal member main body 263a has a shape in which a middle portion in the left-right direction bulges downward in a front view, and a screw that a resin contact member 263b is a fastening member on the bulged portion of the horizontal member main body 263a. It is attached by. The contact member 263b contacts the front frame 25 at the use position (U), and the lower surface on which the contact surface is formed has a shape corresponding to the shape of the front frame 25, that is, a pipe frame shape of the front frame 25. It has a concave shape corresponding to.

  Next, the memo stand support frame 28 that supports the memo stand 5 will be described.

  The memo stand support frame 28 has a shape along the right side of the rear frame 23 as shown in FIGS. 1 to 6, and a plurality of positions are fixed to the rear frame 23 by welding or the like. A base 281 that extends further to the right beyond the right edge of the rear frame 23; a connection 282 that extends from the right end or extension of the base 281 toward the front upper side; and an upper end or extension of the connection 282 A memo stand support portion 283 that extends forward from the end and rotatably supports the memo stand is provided. The connection portion 282 has an inclination toward the outside as it goes forward when viewed in a plan view. In other words, it has an inclination that is separated from the seat plate 3 toward the front. In addition, the memo stand support portion 283 has a slope slightly upward as it goes forward.

  Next, the seat plate 3 will be described in detail.

  As shown in FIGS. 1 to 6, the seat plate 3 is a portion that is provided on the back surface, that is, the lower surface of the seat plate main body 31 and is engaged with the seat plate support frame 26. A support frame engaging portion (not shown) and a cushion portion 33 provided on the upper surface of the seat plate main body 31 are provided. The seat plate main body 31 and the support frame engaging portion are integrally formed of resin.

  As shown in FIGS. 1 to 3, 5, and 6, the seat plate main body 31 has a shape in which the front end portion hangs downward and the rear end portion warps upward. Yes. A standing wall portion (not shown) is provided around the end portion of the shaft 262 in the seat plate body 31, that is, near the outside of the mounting bracket 232 of the rear frame 23, so that a finger or the like approaches the vicinity of the shaft 262. ing.

  As shown in FIGS. 2, 3, 5, and 6, the peripheral edge portion of the seat plate 3, that is, the peripheral edge portion of the seat plate main body 31 is other than the seat plate support frame 26 and the memo stand support frame 28 of the chair body 1. It is comprised so that it may space apart from the site | part which consists of a component. More specifically, in the use position (U), the chair C according to the present embodiment has a region other than the entire periphery of the seat plate body 31 and the seat plate support frame 26 and the memo stand support frame 28 of the chair body 1. The part which consists of a component is comprised so that it may leave | separate with a fixed space | interval, and it makes it difficult for a user's fingers and clothes to be pinched on the lower surface side of the seat board 3. FIG. The side frame 24 extending in the front-rear direction and the side edge of the seat plate 3 and the side frame 24 and the support frame main body 261 are configured to be separated in the vertical direction.

  As shown in FIGS. 1 to 6, the back plate 4 includes a back plate main body 41 and attachment portions 42 that are integrally provided on the left and right sides of the back plate main body 41. The lower end of the back plate main body 41 extends downward. Then, the back plate 4 is supported by the chair body 1 by fitting the mounting hole 421 formed in the mounting portion 42 and opening downward to the back frame 27. The back frame 27 is inserted and fixed in the mounting hole 421 until the upper end of the back frame 27 reaches substantially the same height as the lower edge 411 in the center of the back plate main body 41. Further, as shown in FIG. 5, the back plate main body 41 has a curved shape so that the central portion bulges back in plan view.

  As shown in FIGS. 1 to 6, the memo stand 5 is interposed between the memo stand main body 6 having a plate shape and the memo stand main body 6 and the memo stand support frame 28. And a memo stand holding mechanism 7 as a holding mechanism to be supported.

  As shown in FIGS. 1 and 4, the memo stand body 6 has a substantially rectangular plate shape in which the right side of the edge near the seated person bulges toward the seated person in the working position (UU). In (UU), the surface facing upward is set as a mounting surface 6a for mounting an article. Further, the memo stand main body 6 is stored in the right end portion of the memo stand main body 6 shown in FIG. 6 from the use posture (UU) shown in FIGS. 1 to 4 to the standing posture (TT) shown in FIG. It can be rotated and cantilevered up to the posture (SS) or in the opposite direction.

  The memo stand holding mechanism 7 is movable between the use posture (UU) and a substantially vertical standing posture (TT) by rotating the memo stand body 6 around a first axis extending in the front-rear direction. In addition, the memo stand body 6 is moved between the standing posture (TT) and the retracted posture (SS) by rotating the memo stand body 6 around a second axis extending in the left-right direction in the standing posture (TT). Support as possible. The memo stand holding mechanism 7 supports the memo stand main body 6 so as to be slidable when the memo stand main body 6 is positioned between the use posture (UU) and the substantially vertical standing posture (TT). . Here, the mechanism part responsible for the rotation operation and the mechanism part responsible for the slide operation are provided independently of each other. More specifically, as shown in FIG. 3 and FIG. 5 to FIG. 12, the mechanism part responsible for the rotational operation is a chair for shifting the memo stand body 6 from the use posture (UU) to the standing posture (TT). A holding member 71 as a first structure that rotates about a first axis with respect to the main body 6 and the holding for moving the memo stand main body 6 from a standing posture (TT) to a retracted posture (SS). And a guide member 72 that rotates about a second axis with respect to the member. On the other hand, the mechanism portion responsible for the sliding operation is provided with a slider member 73 as a third structure that is slidable with respect to the guide member 72 and supports the memo base body 6. Further, the memo stand holding mechanism 7 is located at the front end of the movable range when the memo stand main body 6 is located at a predetermined slide operation position, specifically, from the use posture (UU) to the standing posture (TT). The rotation restricting portion 74 that allows the rotating operation of the memo stand main body 6 and the cover member 75 that covers the holding member 71 and the memo stand supporting portion 283 are provided.

  As shown in FIGS. 8 to 12, the holding member 71 has a loop shape in which both ends are opened, and a holding bracket 711 that houses the memo stand support portion 283 of the memo stand support frame 28, and the holding bracket 711. A base 712 in which the memo stand support portion 283 is positioned between the first frame and the first frame and a second frame for sandwiching the memo stand support portion 283 provided between the holding bracket 711 and the base 712. A retaining plate 715 for sandwiching the slider member 72 between the sandwiching members 713 and 714 and the base 712, and the base 712 and the retaining plate provided between the base 712 and the retaining plate 715. A spacer 716 for preventing interference between the plate 715 and the slider member 72, and a female screw hole 712a provided in the base 712 are screwed. It is and a male screw member 717 for fastening the base 712, the spacer 716 and the retaining plate 715. As described above, the holding member 71 includes the use posture (UU) and the standing posture (TT) about the first axis extending in the front-rear direction, more specifically, the central axis of the memo stand support portion 283. Can be rotated between the two. The holding bracket 711 is provided with a long hole 711a, and the support frame 28 (the memo stand support portion 283) is provided with a protrusion 289 that engages with the long hole 711a. And the projection 289 limit the range of rotational movement around the central axis of the memo stand support 283 and guide the direction of rotational movement. The base 712 has a plate shape and substantially overlaps the holding bracket 711. The first clamping member 713 is disposed between the memo stand support portion 283 of the support frame 28 and the base 712 in a space for accommodating the support frame 28 of the holding bracket 711, and the support frame It hits the 28 memo stand support part 283. The second holding member 714 is attached to the memo stand support portion 283 of the support frame 28 via a male screw member 288, and holds the memo stand support portion 283 between the first holding member 713 and the second holding member 714. To do. The protrusion 289 is formed using the head of the male screw member 288. The retaining plate 715 sandwiches the guide member 72 between the base 712 and is attached to the base 712 via the male screw member 717. The spacer 716 is disposed in a circular hole 721 b (described later) provided in the guide member 72 and is disposed between the retaining plate 715 and the base 712. Here, the rotation axis L1 of the rotation of the holding member 71 around the chair body 1 is such that when the memo stand body 6 is at least in the standing posture (TT), the memo stand body 6 is in the upright position with the use posture (UU). It is set to be inclined with respect to the sliding direction X of the memo stand main body 6 with respect to the chair main body 1 when it is positioned between the posture (TT). The guide member 72 is held so as to be rotatable around the second axis extending in the left-right direction with respect to the holding member 711.

  As shown in FIGS. 7 to 12, the guide member 72 is sandwiched between the base 712 of the holding member 71 and the retaining plate 715, and more specifically around the second axis extending in the left-right direction. Is a plate-shaped guide member main body 721 that can rotate around a normal line passing through the center of the base 712, and guide grooves 732x of the rail 732 of the slider member 73 provided at both ends in the height direction of the guide member main body 721. And a guide protrusion 722 that engages with. Further, the guide member main body 721 is provided with a semicircular elongated hole 721a that engages with the pin 718 protruding from the base 712, and the holding member 71 of the guide member 72 is formed by the elongated hole 721a and the pin 718. The range of the rotation operation with respect to the angle and the direction of the rotation operation are guided. Further, a circular hole 721b for arranging the spacer 716 of the holding member 71 therein is provided at the center of the guide member main body 721. The spacer 716 is provided so as to provide a gap between the guide member 72 and the base 712 and the retaining member 715 so that the guide member 72 can rotate around the second axis. ing. As described above, by engaging the guide protrusion 722 with the guide groove 732x of the rail 732 of the slider member 73, the slider member 73 is held slidably with respect to the guide member 72. The guide member 72 has a function as a second member in the claims. The slider member 73 has a function as a first member in the claims.

  As shown in FIGS. 7 to 11, the slider member 73 includes a face plate portion 731 x having a plate shape along a surface opposite to the placement surface 6 a of the memo stand body 6, and both height direction ends of the face plate portion 731 x. The slider member main body 731 made of metal having a folding wall 731a facing the face plate portion 731x and attached inside the folding wall 731a, in other words, between the folding wall 731a and the face plate portion 731x, respectively. A resin rail 732 having a guide groove 732x extending in the width direction therein, and an attachment member 733 for preventing the rail 732 from falling off the slider member body 731 after the rail 732 is attached to the slider member body 731 It has. Here, as shown in FIG. 10, the rail 732 also has a function as a cover that covers the leading edge of the folded wall 731 a. The mounting member 733 also has a function as a stopper for limiting the relative sliding range with respect to the guide member 72, and the mounting member 733 is detachable from a mounting recess 732 y provided on the rail 732. . In a state where the attachment member 733 is attached to the rail 732, the outer surface of the attachment member 733 and the outer surface of the rail 732 are flush with each other. On the other hand, in a state where the attachment member 733 is not attached, the guide groove 732x of the rail 732 is opened outward. Thus, the guide groove 732x engages with the guide protrusion 722 of the guide member 72, thereby restricting the sliding movement direction of the slider member 73 with respect to the chair body 1, in other words, the sliding movement direction with respect to the guide member 72. . The direction X of the sliding operation of the memo base body 6 is along the center line in the width direction of the seat plate 3 of the chair body 1 and is orthogonal to the counter-use end 6 b of the memo base body 6. The slider member 73 and the memo stand main body 6 are movable only in the direction in which the guide groove 732 x extends with respect to the guide member 72. Further, the slider member 73 moves the memo stand main body 6 back and forth between the position shown by the solid line in FIG. 3, FIG. 4 and FIG. 5 (the front end of the movable range) and the position shown by the imaginary line (the rear end of the movable range). Hold slidable. And the rotation guide member 741 which comprises the said rotation limitation part 74 is attached to the slider member main body 731 of this slider member 73 so that relative movement is impossible.

  As shown in FIGS. 7 and 9, the rotation restricting portion 74 includes a rotation guide member 741 attached to the slider member main body 731 so as not to be relatively movable as described above, and a head of the male screw member 717 of the holding member 71. A plurality of, specifically, two guided members 742 are formed using the portion. As shown in FIGS. 7 and 8, the rotation guide member 741 guides the guided member 742 to permit the sliding operation and to inhibit the rotation operation, the first cam surface 741a. And a second cam surface 741b that is provided continuously at one end of the first cam surface 741a and that allows the rotation operation, and is a plate-like member. The two cam surfaces 741 a and 741 b stand up from the plate surface of the slider member main body 731. Further, at one end portion of the second cam surface 741b, there is provided a rotation stopper portion 741c for engaging with the guided member and 742 to prohibit further rotation operation. Here, when the memo base body 6 slides, the guided member 742 slides along the first cam surface 741a. On the other hand, when the memo base body 6 rotates, the guided member 742 slides along the second cam surface 741b. More specifically, when the memo stand body 6 is in the standing posture (TT) and is positioned at the front end of the slide range, the rotation guide member 741 is disposed above one guided member 742 as shown in FIG. Since the second cam surface 741b is positioned, rotation is permitted when a rotational operation force around an axis extending in the left-right direction is applied to the memo stand body 6. On the other hand, when the memo stand main body 6 is in the standing posture (TT) and is located at a position other than the front end of the slide range, the rotation guide member 741 is positioned above each guided member 742 as shown in FIG. Since one cam surface 741a is positioned, the rotation of the memo base body 6 is restricted even when a rotational operation force around an axis extending in the left-right direction is applied to the memo base body 6. Here, when the memo base body 6 is rotated about 180 degrees from the state where the memo base body 6 is in the standing posture (TT) and located at the front end of the slide range, in other words, the memo base body 6 as shown in FIG. After rotating 90 degrees to be in a predetermined intermediate position (CC) and further rotating 90 degrees to the retracted position (SS), the front and back position of the memo stand body 6 is the rearmost. In the state where the memo stand body 6 is located between the intermediate posture (CC) and the retracted posture (SS), as shown in FIG. 17, the guided member 742 and the second cam surface 741b are engaged with each other. Thus, the sliding movement of the memo base body 6 is restricted. In other words, in the memo stand holding mechanism 7 including the rotation guide member 74, the memo stand main body 6 is in a region from the use posture (UU) through the standing posture (TT) to the intermediate posture (CC). The memo stand main body 6 is held so that the memo stand main body 6 is allowed to move back and forth only.

  As described above, the cover member 75 covers the holding member 71 and the memo stand support portion 283. Although not shown, the cover member 75 has an attachment claw that protrudes inward and can be retracted by elastic deformation. It has been. The attachment claw can be engaged with an engagement recess (not shown) provided in the holding member 71, and the cover member 75 is attached to the holding member 71 by elastically engaging the attachment claw and the engagement recess. I have to.

  In addition, in the present embodiment, a friction applying element M for providing a frictional resistance to the rotation operation is provided in the mechanism portion that performs the rotation operation. As shown in FIG. 8, the friction applying element M is provided between the chair body 1 and the holding member 71, more specifically, the support frame 28 (the memo stand support portion 283) and the holding member 71. It is provided between. More specifically, the friction applying element M includes a friction applying screw M1 which is a male screw member screwed into a friction adjusting female screw hole 712x provided in the base 712, and the memo stand support portion 283 and the holding member 71. The memo stand support portion 283 in a state in which the second frame clamping member 714 is attached via the first frame clamping member 713 by pressing against the first frame clamping member 713 disposed between the base 712 and the base 712. By further pressing toward the holding bracket 711, the memo stand support portion with the second frame clamping member 714 attached when the memo stand body 6 rotates around the central axis of the memo stand support portion 283. A frictional force is generated between the H.283, the holding bracket 711, and the first frame clamping member 713.

  Furthermore, in the present embodiment, a friction adjustment mechanism K for working on the friction applying element M and adjusting the magnitude of the frictional resistance is provided. As shown in FIG. 8, the friction adjusting mechanism K adjusts the magnitude of the frictional resistance by screwing and retracting the friction applying screw M1 with respect to the first frame clamping member 713. Is formed by using a friction adjusting operation portion provided on the base end side of the friction applying screw M1 and configured to allow insertion of a jig such as a hexagon wrench or a screwdriver. The friction adjustment mechanism K is provided in a state in which an adjustment operation is not possible when the assembly is completed. Specifically, the friction adjustment operation part is covered with the retaining plate 715 in the assembled state.

  In addition, in the present embodiment, an auxiliary friction adjustment mechanism H is provided to allow fine adjustment of the magnitude of the frictional resistance even in the assembled state. The auxiliary friction adjusting mechanism H is provided between the holding bracket 711 and the base 712 as shown in FIG. More specifically, the auxiliary friction adjusting mechanism H is configured such that an auxiliary friction applying screw H1 which is a male screw member is screwed into an auxiliary screw adjusting female screw hole 711x provided in the holding bracket 711, and the auxiliary friction applying screw H1 is used as a base. The distance between the holding bracket 711 and the base 712 is adjusted by screwing back and forth with respect to the 712, and the memo stand supporting portion 283, the holding bracket 711, and the holding bracket 711 in a state where the second frame clamping member 714 is attached. The frictional force generated between the first frame clamping member 713 and the first frame clamping member 713 is adjusted.

  And the positional relationship of the memo stands when the chairs of this embodiment having the same structure are overlapped in the front-rear direction will be described below with reference to FIG. The left and right rear legs 22 of the other chair C ′ positioned in front of the specific chair C are positioned rearward of the front leg 21 of the specific chair C and positioned in front of the rear leg 22 of the specific chair C. To do. The front end 51x of the memo stand body 6 of the specific chair C is on the right side of the right end 4x of the back plate 4, in other words, the width direction edge of the portion excluding the memo stand 5 and the memo stand support frame 28 of this chair. Located outside. That is, when another chair C ′ having the memo stand main body 6 in the storage posture (SS) is placed in front of the specific chair C in the memo stand main body 6 in the storage posture (SS), The back plate 5 of the chair C ′ is positioned behind the memo stand 5 without interfering with the memo stand 5 of the specific chair C. Further, the base end portion of the memo stand support frame 28 of the other chair C ′ is also located behind the front end of the memo stand body 6 of the specific chair C.

  As described above, according to the configuration of the chair C according to the present embodiment, the friction imparting element M for providing the frictional resistance to the rotational motion is provided in the mechanism portion responsible for the rotational motion, and the friction imparting is provided. Since the friction adjustment mechanism K for acting on the element M to adjust the magnitude of the frictional resistance is provided, the rotation of the frictional resistance by rotating the frictional movement mechanism via the friction adjustment mechanism K It is possible to set the operational feeling when performing the operation according to the user's preference.

  Further, the friction adjustment mechanism K is provided in a state in which the adjustment operation is impossible in the assembly completion state, and an auxiliary friction adjustment mechanism H for finely adjusting the magnitude of the frictional resistance in the assembly completion state. Since it is provided side by side, it is possible to set a rough magnitude of the frictional resistance of the rotating operation when assembling the chair C, and meet the demand for fine adjustment of the frictional resistance after the assembly of the chair C is completed.

  The memo stand main body 6 is configured so as to reach the retracted posture (SS) from the use posture (UU) through the standing posture (TT), and the mechanism portion responsible for the rotational operation of the memo stand holding mechanism 7 is configured as described above. A holding member 71 that rotates about the first axis with respect to the chair body 1 in order to shift the memo stand body 6 from the use posture (UU) to the standing posture (TT), and the memo stand body 6 in the standing posture. A guide member 72 that rotates about the second axis with respect to the holding member 71 in order to shift from (TT) to the retracted posture (SS), and the friction applying element M and the friction adjustment. Since the mechanism K is provided between the chair body 1 and the first holding member 71, such a friction adjustment mechanism K can be provided with a simple configuration.

  Further, the holding member 71 includes a bracket 711 that houses the memo stand support frame 28 of the chair body 1 inside, and a base 712 that positions the memo stand support frame 28 between the bracket 711, The friction applying element M and the friction adjusting mechanism K can be screwed back and forth with respect to the female screw hole 712x provided in the base 712 and the male screw that presses the memo stand support frame 28 toward the bracket 711. Since the member is used, the friction applying element M and the friction adjusting mechanism K as described above can be easily realized with a small number of parts.

  In addition, since the friction applying screw M1 constituting the friction adjusting mechanism K is covered with the guide member 72 in the assembled state, it is possible to prevent the frictional force of the rotational operation from being changed suddenly.

  Since the auxiliary friction adjustment mechanism H is provided between the bracket 711 and the base 712 of the holding member 71 and changes the distance between them, the auxiliary friction adjustment mechanism H is provided with a simple configuration. Can do.

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

  For example, in the above-described embodiment, rotational movement is allowed when the memo stand main body is slid to the front end of the movable range, but as described below with reference to FIGS. Rotational motion may be allowed when the memo stand body 6 is slid to the rear end of the movable range. Since the chair with a memo stand in this aspect has the same configuration as that in the above-described embodiment except for the rotation guide portion A74, the corresponding parts are denoted by the same names and reference numerals, and detailed description thereof is omitted. The rotation guide portion A74 of this aspect includes a plurality of rotation guide members A741 that are attached to a slider member main body (not shown) so as not to move relative to each other and a head of a male screw member (not shown) of a holding member (not shown). Specifically, two guided members A742 are provided. The rotation guide member A741 is a plate-like member having a shape obtained by rotating the rotation guide member 741 in the above-described embodiment by 180 degrees while being parallel to the top plate surface of the memo stand body 6, and the rotation in the above-described embodiment. Similarly to the guide member 741, by guiding the guided member A742, a sliding operation of the memo base body 6 is permitted, and a first cam surface A741a serving as a rotation restricting portion that prohibits the rotational operation of the memo base body 6; The first cam surface A741a is provided continuously with one end of the first cam surface A741a, and the second cam surface A741b is a rotation permission portion that allows the rotation of the memo stand body 6. Further, at one end of the second cam surface A741b, there is provided a rotation stopper A741c for prohibiting further rotation by engaging the guided member and A742. Here, when the memo stand main body 6 slides, the guided member A742 slides along the first cam surface A741a. On the other hand, when the memo stand main body 6 rotates, the guided member A742 slides along the second cam surface A741b. More specifically, when the memo stand main body 6 is in the standing posture (TT) and is located at the rear end of the slide range, as shown in FIG. 18, the rotation guide member is located above one guided member A742. Since the second cam surface A741b of A741 is positioned, rotation is permitted when a rotational operation force around an axis extending in the left-right direction is applied to the memo stand body 6. On the other hand, when the memo stand main body 6 is in the standing posture (TT) and is located at a position other than the rear end of the slide range, as shown in FIG. 19, the rotation guide member A741 is located above each guided member A742. Since the first cam surface A741a is positioned, the rotation of the memo base body 6 is restricted even when a rotational operation force around an axis extending in the left-right direction is applied to the memo base body 6. Here, from the state where the memo stand main body 6 is in the standing posture (TT) and positioned at the rear end of the slide range, the memo stand main body 6 as shown in FIG. After being in the state at (CC), it can be further rotated 90 degrees to the retracted posture (SS) as shown in FIG. In the state where the memo stand body 6 is located between the intermediate posture (CC) and the retracted posture (SS), as shown in FIG. 21, the guided member A742 and the second cam surface A741b are engaged with each other. Thus, the sliding movement of the memo base body 6 is restricted. In other words, the memo stand holding mechanism including the rotation guide member A74 is provided when the memo stand main body 6 is in a region from the use posture (UU) to the intermediate posture (CC) through the standing posture (TT). Only the memo stand main body 6 is held so that the memo stand main body 6 can be moved back and forth.

  If such a configuration is adopted, when the memo stand main body 6 is moved to the retracted posture (SS) through the standing posture (TT), the memo stand main body 6 is slid to the rear end of the movable range so as to be rotatable. Then, when the memo base body 6 is rotated in a direction in which the upper part of the memo base body 6 in the standing posture (TT) is directed rearward, the memo base body 6 is not slid rearward any more. That is, a series of operations for moving the memo stand body 6 to the retracted posture (SS) through the standing posture (TT), that is, the sliding operation and the rotating operation can be performed smoothly and continuously.

  In the above-described embodiment, the friction adjustment mechanism provided in a state in which the adjustment operation is impossible in the assembly completion state, and the auxiliary friction for enabling the magnitude of the frictional resistance to be finely adjusted in the assembly completion state. Although an adjustment mechanism is also provided, a mode in which only a friction adjustment mechanism that can be adjusted even in an assembled state may be employed.

  Furthermore, in the above-described embodiment, the mechanism portion responsible for the rotation operation of the memo stand holding mechanism rotates around the first axis with respect to the chair main body in order to shift the memo stand main body from the use posture to the standing posture. A holding member that is a first structure, and a guide member that is a second structure that rotates about a second axis with respect to the holding member in order to shift the memo stand body from a standing posture to a retracted posture. However, the present invention is also applicable to a chair in which the memo stand body is not configured to be rotatable around the second axis. That is, even if the memo stand main body can perform only the rotation operation around the central axis of the memo stand support frame and the slide operation with respect to the chair main body, the mechanism portion responsible for the rotation operation and the mechanism responsible for the slide operation If the parts are provided independently of each other, the most main effect of the present invention can be obtained by providing a friction applying element for giving a frictional resistance to the rotation operation in the mechanism part responsible for the rotation operation. it can.

  And in embodiment mentioned above, although the external thread member employ | adopts the friction provision element of the structure which presses a memo stand support frame toward the bracket of a holding member via the 1st clamping member, for example, said 1st The sandwiching member may be made of a material that can accumulate a reaction force by elastic deformation such as an elastomer, and the memo stand support frame may be pressed toward the bracket using the reaction force. That is, a mode in which the first clamping member and the male screw member are provided with a function as a friction applying element may be employed.

In addition, instead of the mode of adjusting the frictional force by screwing back and forth the male screw member that functions as a friction applying element, for example,
In addition, various changes may be made without departing from the spirit of the present invention.

C, C '... Chair 5 ... Memo stand 6 ... Memo stand body 7 ... Memo stand holding mechanism (holding mechanism)
UU ... Use posture SS ... Storage posture M ... Friction imparting element K ... Friction adjustment mechanism

Claims (6)

A chair comprising a chair main body and a memo stand that supports the chair main body via a holding mechanism on the chair main body, wherein the holding mechanism uses at least the rotational operation of the memo base main body. The memo stand main body is configured to be able to be operated between the use posture and the retracted posture, and a friction applying element for providing a frictional resistance to the rotation operation is provided in the mechanism portion responsible for the rotation operation. Friction adjustment mechanism for working on the imparting element and setting a rough magnitude of the frictional resistance of the rotational motion at the time of assembly, and auxiliary for enabling fine adjustment of the magnitude of the frictional resistance when the assembly is completed A chair comprising a friction adjusting mechanism . The friction adjustment mechanism according to claim 1 chair according those provided by the adjustment operation is not possible state in the fully assembled state. The memo stand main body is configured so as to reach a retracted posture from a use posture through a standing posture, and a mechanism portion responsible for the rotation operation of the holding mechanism changes the memo stand main body from the use posture to the standing posture. A first structure that rotates about a first axis with respect to the chair body for transition, and a first structure for transition of the memo stand body from a standing position to a retracted position. A second structure that rotates about a second axis, wherein the friction applying element and the friction adjusting mechanism are provided between the chair body and the first structure. The chair according to claim 1 or 2, wherein: The first structure includes a bracket that houses a memo stand support frame of a chair body therein, and a base that positions the memo stand support frame between the bracket, the friction applying element, and friction adjustment The mechanism is formed by using a female screw hole provided in the base and a male screw member that can be screwed back and forth with respect to the female screw hole and presses the memo stand support frame toward the bracket. The listed chair. The chair according to claim 4, wherein the male screw member of the friction adjustment mechanism is covered with the second structure when the assembly is completed. The memo stand main body is configured so as to reach a retracted posture from a use posture through a standing posture, and a mechanism portion responsible for the rotation operation of the holding mechanism changes the memo stand main body from the use posture to the standing posture. A first structure that rotates about a first axis with respect to the chair body for transition, and a first structure for transition of the memo stand body from a standing position to a retracted position. A second structure that rotates about a second axis, wherein the first structure includes a bracket that houses a memo stand support frame of a chair body, and the bracket, And a base on which the memo stand support frame is positioned, and the auxiliary friction adjustment mechanism is provided between the bracket and the base of the first structure to change the distance therebetween. Item 2. The chair according to Item 2.

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