JP2013102788A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a rotating motion of a memo stand body without increasing the number of components or deteriorating the design flexibility in a chair which has a holding mechanism that can operate the memo stand body between a usage posture and a storage posture using the rotating motion of the memo stand body.SOLUTION: The chair C includes: a chair body; and a memo stand 5 which causes the chair body to support the memo stand body 6 through a memo stand holding mechanism 7. The memo stand holding mechanism 7 includes a rotation control part 74 which can move the memo stand body 6 between the usage posture (UU) and the storage posture next to the chair body using the rotating motion and a sliding motion of the memo stand body 6, and allows the rotating motion of the memo stand body 6 only at the predetermined sliding motion posture.

Description

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

  Conventionally, as this type of chair, there is a memo stand main body capable of taking a use posture in which the plate surface is substantially horizontal and a storage posture in which the plate surface is substantially vertical, and a memo stand holding mechanism for holding the memo stand main body. Those are known (for example, see Patent Document 1).

  In such a thing, what utilizes the rotation operation | movement of a memo stand main body as a structure for enabling a memo stand main body to operate | move between a use attitude | position and a storing attitude | position is considered.

  On the other hand, in a state where the memo stand main body is in the use posture, it is desirable that the rotation operation can be prohibited in order to prevent the memo stand main body from rotating due to an external action. In order to respond to such a request, a mode in which a stopper for prohibiting the rotation of the memo stand main body is separately provided can be considered. However, when such an aspect is adopted, another problem arises that the number of parts increases and a space for attaching the stopper needs to be secured, so that the degree of freedom in design is reduced.

Utility Model Registration No. 3154256

  The present invention pays attention to the above points, and in the chair having a holding mechanism capable of operating the memo stand main body between the use posture and the retracted posture by using the rotation operation of the memo stand main body, the increase in the number of parts and the design It is an object of the present invention to enable the rotation operation of the memo stand main body to be prohibited without causing a decrease in the degree of freedom.

  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. Rotation that allows the memo stand main body to be operated between the use posture and the retracted posture by using the rotation operation and the slide operation of the memo stand, and allows the rotation operation of the memo stand main body only at a predetermined slide operation position. It is characterized by having a limiting part.

  In such a case, when the memo stand main body is in the use posture, the user can only rotate the memo stand main body by placing the memo stand main body at a predetermined slide operation position. Since the rotation of the memo stand main body is prohibited when the memo stand main body is arranged at the slide operation position, the memo stand is utilized by using a mechanism for sliding the memo stand main body without separately preparing a member as a stopper. The rotation of the main body can be prohibited. In other words, since the rotation operation of the memo stand body is not allowed without the user's intentional operation of placing the memo stand body at a predetermined slide operation position, such a memo stand can be used stably. be able to.

  As an example of a mode for realizing such a rotation limiting unit, the rotation limiting unit is provided on one of the rotation guide members that rotate relatively during the rotation operation of the memo stand main body and the other. A rotation restricting portion that includes a guided member that is guided by the rotation guide member, the rotation guide member allowing the sliding operation and prohibiting the rotation operation by guiding the guided member. And a rotation allowing portion that is provided continuously to the rotation restricting portion and allows the rotating operation.

  As an example of a configuration for easily realizing the rotation restricting portion described in the previous stage, the guided member slides along the first cam surface which is the rotation restricting portion of the rotation guide member during the sliding operation. In the rotating operation, the guided member slides along the second cam surface which is a rotation allowing portion of the rotating guide member.

  As a configuration suitable for continuously performing the sliding operation and the rotation operation, one end portion of the first cam surface of the rotation guide member is continuous with the second cam surface of the rotation guide member. What you are doing.

  As an example of a specific configuration of the rotation limiting portion as described above, the rotation guide member is a plate-like member having the first and second cam surfaces, and the guided member is the first and first members. 2 is a projection guided by the cam surface.

  By engaging with the guided member at one end of the second cam surface as an aspect for easily realizing a configuration in which the memo stand that has been retracted by the rotating operation is held in the retracted position. There is one provided with a rotation stopper portion for prohibiting further rotation operation.

  According to the present invention, in a chair having a holding mechanism that can operate the memo stand main body between the use posture and the retracted posture using the rotation operation of the memo stand main body, the number of parts and the degree of design freedom are increased. The rotation operation of the memo stand main body can be prohibited without causing a decrease.

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. The figure which shows schematically the principal part of the memo stand support mechanism of the chair which concerns on other embodiment of this invention.

  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, when the memo stand body 6 is in the use posture (UU), when the memo stand body 6 is placed at a predetermined slide operation position, that is, other than the front end in the movable range. Since the rotation operation of the memo stand main body 6 is prohibited, when the memo stand main body 6 is in the use posture (UU), the memo stand main body 6 is not inserted until the user places the memo stand main body 6 at the front end of the movable range. Rotation operation of the memo base body 6 is prohibited when the memo base body 6 is arranged at other slide operation positions, so that the memo base body 6 can be operated without preparing a member as a stopper. Rotation of the memo base body 6 can be prohibited using a mechanism for sliding the memo. In other words, since the rotation operation of the memo stand body 6 is not allowed without a user's intentional operation of placing the memo stand body 6 at a predetermined slide operation position, the memo stand 5 can be used stably. be able to.

  The rotation restricting portion 74 includes a rotation guide member 741 provided on the slider member 73 side and a guided member 742 provided on the holding member 71 side and guided by the rotation guide member 741. The rotation guide member 741 is provided continuously with a first cam surface 741a that permits a sliding operation and prohibits a rotation operation by guiding the guided member 742, and the first cam surface 741a. Since the second cam surface 741b that allows the rotation operation is provided, such a rotation limiting unit 74 can be realized with a small number of parts.

  Further, the guided member 742 slides along the first cam surface 741a of the rotation guide member 741 during the sliding operation, and the second cam surface of the rotation guide member 741 during the rotation operation. Since the guided member 742 slides along 741b, such a rotation restricting portion 74 can be easily realized.

  In addition, since one end portion of the first cam surface 741a of the rotation guide member 741 is continuous with the second cam surface 741b of the rotation guide member 741, the slide operation and the rotation operation are continued. Can be done.

  Further, the rotation guide member 741 is a plate-like member having the first and second cam surfaces 741a and 741b, and the guided member 742 guides to the first and second cam surfaces 741a and 742b. Such a rotation restricting portion 74 can be realized with a simple configuration.

  And since the rotation stopper part 742c for inhibiting the further rotation operation | movement by engaging with the said to-be-guided member 742 is provided in the one end part of the said 2nd cam surface 742b, It is possible to easily realize a configuration in which the memo stand 5 in the storage posture (SS) is held in the storage posture (SS).

  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.

  Further, if a stopper portion 741x as shown in FIG. 22 is provided on the rotation guide member 741, and the stopper portion 741x hits against the guided member 742 and a mode in which further sliding operation is restricted is adopted, the rail mounting It is not necessary for the member to have a function as a stopper. Further, instead of the plurality of guided members 742 according to the above-described embodiment, a curved shape that does not interfere with the rotation guide member 741 when the note base body 6 and the slider member 73 are rotated as shown by an imaginary line in the figure. One guided member 744 may be provided. In addition, the rotation guide member 741 may have a shape in which a portion opposite to the first cam surface 741a is removed with the imaginary line in FIG.

  On the other hand, in the above-described embodiment, sliding of the memo stand main body is allowed only when the memo stand main body is in a region from the use posture to the predetermined intermediate posture between the standing posture and the retracted posture through the standing posture. Although the memo stand holding mechanism is configured, the memo stand holding mechanism is configured not to allow the memo stand main body to slide when the memo stand main body is in the region between the standing posture and the intermediate posture. Of course you can. Further, in the above-described embodiment, the state in which the memo stand main body is rotated 90 degrees from the standing posture is set as the intermediate posture, but the memo stand main body is turned from the standing posture to the retracted posture in a range of 0 degree or more and less than 90 degrees. Of course, the angle rotated state may be the intermediate posture.

  In addition, in the above-described embodiment, the guided member slides along the first cam surface which is the rotation restricting portion of the rotation guide member during the slide operation, and the rotation guide member during the rotation operation. The guided member slides along the second cam surface which is the rotation permission portion of the first cam body. For example, the second cam surface is omitted, and the first structure in the above-described embodiment You may make it provide separately the rotation guide part which guides the direction of rotation operation between 2nd structures. In this case, the rotation guide member has only a function as a rotation restricting means for restricting the rotational movement of the memo stand main body.

  And the rotation stopper part of the one end part of the second cam surface is omitted, and the range of the rotational motion using only the rotation range limiting mechanism provided between the first structure and the second structure. May be regulated.

  In addition, various changes may be made without departing from the spirit of the present invention.

C, C '... Chair 1 ... Chair body 5 ... Memo table 6 ... Memo table body 7 ... Memo table holding mechanism (holding mechanism)
UU ... Use posture SS ... Storage posture

Claims (6)

A chair comprising a chair body and a memo stand that is supported by the chair body via a holding mechanism, wherein the holding mechanism uses a rotating operation and a sliding operation of the memo stand body. The memo stand main body can be operated between the use posture and the retracted posture, and includes a rotation restricting portion that allows the memo stand main body to rotate only at a predetermined slide operation position. A chair characterized by that. The rotation limiting portion includes a rotation guide member provided on one of the members that relatively rotate during the rotation operation of the memo stand main body, and a guided member provided on the other and guided by the rotation guide member. The rotation guide member guides the guided member to permit the sliding operation and prohibit the rotation operation, and a rotation restriction unit provided continuously to the rotation restriction unit to perform the rotation operation. The chair according to claim 1, further comprising an allowable rotation allowing portion. The guided member slides along the first cam surface that is the rotation restricting portion of the rotation guide member during the sliding operation, and the second rotation rotation portion of the rotation guide member during the rotation operation. The chair according to claim 2, wherein the guided member slides along the cam surface. The chair according to claim 3, wherein one end portion of the first cam surface of the rotation guide member is continuous with the second cam surface of the rotation guide member. 4. The rotation guide member is a plate-like member having the first and second cam surfaces, and the guided member is a protrusion guided by the first and second cam surfaces. Or the chair of 4. The rotation stopper part for prohibiting the further rotation operation by engaging with the said to-be-guided member is provided in the one end part of the said 2nd cam surface. The listed chair.

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