JP2013075137A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair that includes a seat, a backrest, an armrest and the top plate which is available at various seating positions while the entire of the backrest and the function of the armrest are always available.SOLUTION: The chair includes: a chair body 2 provided with a seat 5, a backrest 7, and an armrest 8, and opened toward the front; and a top plate 3 movable from a first use position supported by the chair body 2 and positioned at the top of the armrest 8 to a second use position positioned forward of the chair body 2 while opening the top of the armrest 8.

Description

  The present invention relates to a chair provided with a top board that can be used as a memo stand or the like.

  Conventionally, in the event of a meeting, etc., it is possible to arrange a large number of chairs without arranging a table, and for the sake of convenience such as when a seated person writes or uses information equipment typified by a personal computer, It is widely known to use a chair having a top plate that can be used as a memo stand or the like. As an example of such a chair, a leg, a seat supported rotatably with respect to the leg, and an arm that is rotatable with respect to the leg and the seat and can be used with a top plate attached thereto are provided. The thing is considered (for example, refer patent document 1).

  By the way, the thing of the said patent document 1 can change the position of the top plate with respect to a seated person by rotating the arm of the state which attached the top plate with respect to the leg and the seat, and the state which removed the top plate The arm can be used as a backrest by rotating and moving the arm of the arm relative to the leg and the seat, and the arm can be mounted on the armrest by positioning the arm to the side of the seated person. Can be used as Then, the top plate can be used as a memo stand or the like by positioning the arm in front or side of the seated person and attaching the top plate to the arm. However, in the case of the one described in Patent Document 1, when both of the paired arms are positioned behind the seated person, the arm is used as an armrest and the top plate is attached to the arm. The top plate cannot be used as a memo stand or the like, and when both of the paired arms are positioned on the side or front of the seated person, it cannot be used as a backrest. In addition, when one of the arms forming the pair is positioned behind the seated person and the other is positioned laterally or forward of the seated person, the seated person may feel that the function as a backrest is insufficient. is there.

  Therefore, in a chair equipped with a backrest, armrests and top plate, the seatback and various seating postures, in other words, the front-facing seating and the side-facing seating, can be used at all times while the entire backrest and armrest functions can be used. There is a desire to be able to use the top board in a posture or the like.

JP 63-206210 A

  The present invention pays attention to the above points, and is provided with a seat, a backrest, an armrest, and a top plate, and is capable of using the top plate in various seating postures in a chair that can always use the entire function of the backrest and the armrest. With the goal.

  That is, the chair according to the present invention includes a chair body that includes a seat, a backrest, and an armrest, and is open toward the front, and the armrest from a first use position that is supported by the chair body and positioned above the armrest. And a top plate that is movable between a second use position located in front of the chair body with the upper portion thereof being opened.

  In such a case, when the top plate is arranged at the first use position, the top plate can be used as a memo stand or the like in a sitting posture in which the seated person faces sideways, and the top plate can be used as an armrest. Therefore, the top plate can also function as an armrest on which a seated person's elbow can be placed. On the other hand, when the top board is arranged at the second use position, the top board can be used as a memo stand or the like in a sitting posture where the seated person faces forward, and the upper part of the armrest is opened. A seated person's elbow can be placed on the seat. In addition, the seat occupant can use the backrest regardless of the position of the top plate between the first use position and the second use position.

  As an aspect of the chair that can be used in a variety of usage modes, the chair body includes left and right armrests, and the top plate that forms a pair of left and right in relation to the left and right armrests is provided. . Here, “providing a pair of left and right top plates in relation to the left and right armrests” means that the left top plate located at the first use position is located above the left armrest and the first use position. It is a concept which shows that the right top plate arranged on the upper side is positioned above the right armrest.

  In the chair as described in the previous stage, as a mode for making a larger top plate surface available, the left and right top plates face each other in the second use position so as to close the front of the chair body. What is comprised is mentioned.

  As an aspect for adjusting the appearance of such a chair, the chair body is formed with a structure that forms a partial cylindrical shape that is opened forward by left and right armrests and a backrest. One configured to slide horizontally along the upper edge of the structure is exemplified.

  As a mode for supporting the top plate of such a chair movably on the chair body with a simple configuration, the top plate is attached to the top end of a top plate support arm pivotally attached to the lower surface of the seat. One that is attached.

  Moreover, while making the top plate of such a chair movably supported on the chair body with a simple configuration, as an aspect for facilitating the assembly of such a chair, There is a rail having a rail extending along the shape, and the top plate is movable along the rail.

  An armrest is arranged between the rail and the top plate as a configuration for solving the problem that the rail is exposed to the upper space and the appearance is impaired when the top plate is arranged at the second use position. Is mentioned.

  As a specific configuration for facilitating the assembly of such a chair, the rail, the top plate, a slide arm that connects the rail and the top plate and can run along the rail, What can be attached by inserting a top plate traveling unit provided with a side into an opening provided on a side surface below the armrest of the chair body.

  In the chair as described in the previous stage, as a specific configuration for covering the engagement portion between the rail and the traveling portion from the side space, the slide arm is configured to be in sliding contact with the rail, A lower cover that covers an engagement portion between the rail and the traveling unit on a front surface of the rail, and the rail and the traveling unit on an upper portion of the rail. And an upper cover for covering the engaging portion.

  ADVANTAGE OF THE INVENTION According to this invention, the structure which can use a top plate in various seating attitude | positions can be implement | achieved in the chair provided with a seat, a backrest, an armrest, and a top plate, and can use the function of the whole backrest and an armrest at all times.

The front perspective view which shows the chair which concerns on 1st embodiment of this invention. The back perspective view showing the chair concerning the embodiment. The top view which shows the chair which concerns on the same embodiment. AA sectional drawing in FIG. BB sectional drawing in FIG. CC sectional drawing which expands and shows the principal part in FIG. Operation | movement explanatory drawing which shows the action | operation of the top plate which concerns on the same embodiment. Operation | movement explanatory drawing which shows the action | operation of the top plate which concerns on the same embodiment. Operation | movement explanatory drawing which shows the action | operation of the top plate which concerns on the same embodiment. The front perspective view which shows the chair which concerns on 2nd embodiment of this invention. The top view which shows the chair which concerns on the same embodiment. The side view which shows the chair which concerns on the same embodiment. XX sectional drawing in FIG. The plane sectional view showing the important section of the chair concerning the embodiment. Operation | movement explanatory drawing which shows the action | operation of the top plate which concerns on the same embodiment. Operation | movement explanatory drawing which shows the action | operation of the top plate which concerns on the same embodiment.

  A first embodiment of the present invention will be described below with reference to FIGS.

  As shown in FIGS. 1 to 9, the chair 1 according to the present embodiment includes a chair body 2 that includes a seat 5, a leg 6, a backrest 7, and an armrest 8 and is opened forward, and the chair body 2. The top plate 3 is movable between a first use position P1 supported above the armrest 8 and a second use position P2 located in front of the chair body 2 by opening the upper part of the armrest 8 from the first use position P1. And a headrest 4 provided above the backrest 7 of the chair body 2.

  As shown in FIGS. 1 to 5 and FIGS. 7 to 9, the chair body 2 includes a seat 5, a leg 6 that supports the seat 5, and a backrest 7 that is provided above the leg 6. The backrest 7 includes left and right armrests 8 that extend forward from the left and right ends of the backrest 7 respectively. Here, the leg 6, the backrest 7, and the left and right armrests 8 form a structure 21 that forms a partial cylindrical shape that is open forward and is integrally formed as a whole. Further, although not shown, a tension fabric is provided on the surface.

  4 to 6, the seat 5 is formed by using a shell 51 that forms a lower end surface and a seat body 52 that is arranged above the shell 51 and mainly includes a cushion. Yes. Further, a top plate support member 54 for pivotally mounting a later-described top plate support arm 31 for supporting the top plate 3 and a moving direction of the top plate support arm 31 are guided on the lower surface of the shell 51. A rail member 55 is attached. The seat 5 is supported by the legs 6 via a support tool (not shown).

  As shown in FIGS. 1, 4, 5, and 8, the leg 6 has a partially cylindrical shape having an internal space opened forward. Further, the leg 6 has a shape in which the diameter gradually decreases as it goes upward. A caster 61 is provided at the lower end of the leg 6, and a shelf plate 62 on which an article such as a bag can be placed is provided at the lower part of the internal space. As described above, the backrest 7 is provided at the rear upper part of the leg 6, more specifically, immediately above the rear part of the leg 6.

  As shown in FIGS. 1, 4, 5, 6, and 8, the backrest 7 extends rearward from the seat 5, in other words, from the upper end of the rear portion of the leg 6 to the rear upper portion. It has an arc shape. Left and right armrests 8 are integrally extended from both side ends of the backrest 7.

  As described above and as shown in FIGS. 1 to 5 and 7 to 9, the armrest 8 extends forward from the left and right ends of the backrest 7 and has a partial arc shape in plan view. . The armrest 8 extends outward and upward from the upper end of the leg 6. The top plate 3 is attached via the top plate support member 54 so as to be movable above the armrest 8 and more specifically, while maintaining a certain height distance from the upper edge 8a of the armrest 8. ing. A top plate support roller 81 is provided in front of the upper edge 8 a of the armrest 8 so as to contact the lower surface of the top plate 3 and support the top plate 3.

  The left and right top plates 3 are provided in association with the left and right armrests 8. That is, as shown in FIGS. 1 to 5, the left top plate 3 arranged at the first use position P1 is located above the left armrest 8 and the right top plate arranged at the first use position P1. 3 is located above the right armrest 8. Further, the use edges 3a of the left and right top plates 3 each have a shape substantially along the upper edge of the armrest 8, that is, a substantially partial arc shape. Further, the counter-use edge 3b of the left and right top plates 3 has a smooth curved shape protruding outward at the center thereof, and is compared with the distance from the use edge 3a at the end close to the backrest 7. Thus, the distance from the use edge 3a at the end on the side away from the backrest 7 is set large. Both side edges 3c of the left and right top plates 3 are plate-like members that form a straight line. Moreover, as shown in FIG.3 and FIG.5, the left-right top plate 3 has a shape which becomes left-right symmetric when both are arranged in the 1st use position P1. Each top plate 3 is attached to the tip of a top plate support arm 31 pivotally attached to a top plate support member 54 disposed on the lower surface of the seat 5. Each top plate 3 extends from the first use position P1 located above the armrest 8 as described above along the upper edge 8a of the structure 21, in other words, the upper edge 8a of the armrest 8. Can be slid horizontally between the second use positions P2 located in front of the chair body 2 with the upper part of the chair body 2 open. The left and right top plates 3 can be moved separately. For example, as shown in FIG. 7, the left top plate 3 as viewed from the seated person is arranged at the first use position P1, and the right top plate 3 as viewed from the seated person is placed at the first use position P1 and the second use position P1. It can arrange | position to the position between use position P2. As shown in FIG. 8 and FIG. 9, when both the left and right top plates 3 are arranged at the second use position P2, the side edges 3c of the left and right top plates 3 facing each other project against each other. The front of the chair body 2 is closed.

  As shown in FIGS. 3 to 7 and 9, the top plate support arm 31 includes an upright portion 311 a extending downward from the lower surface of the top plate 3, and a lower surface of the seat 5 from the lower end of the upright portion 311 a. The arm main body 31 provided with a horizontal portion 311b extending toward the center, and the base end of the arm main body 31, that is, the end opposite to the top plate 3, are fixed by means such as welding and the above-mentioned A bracket 312 pivotally attached to a top plate support member 54 provided on the lower surface of the shell 51 of the seat 5 via a pivot pin 541 is provided. A horizontal portion 311 b of the arm body 31 passes through a slit 21 a provided at the boundary between the leg 6 and the armrest 8. The structure 21 has a shape having the smallest outer diameter at the height position where the slit is provided, that is, at the boundary between the leg 6 and the backrest 7 or the armrest 8. In addition, a slit cover 211 having a strip shape covering the slit 21a is disposed outside the slit 21a. The slit cover 211 is supported by the structure 21 via a fixture 212. On the side of the bracket 312 away from the pivot pin 541, a rolling element mounting portion 312a is provided upright. Two pairs of rolling elements 312b that are paired vertically are provided at both ends in the width direction of the rolling element mounting part 312a. The rolling elements 312b that form a pair in the vertical direction roll on the upper surface or the lower surface of the rail member 55 in a state where the rail member 55 located in the middle is sandwiched.

  As described above and as shown in FIGS. 1, 2, 4, 5, and 7 to 9, the headrest 4 is provided above the backrest 7 and can support the head of the seated person. The headrest main body 41 and an attachment portion 42 for attaching the headrest main body 41 to the backrest 7 are provided.

  As described above, according to the configuration of the chair 1 according to the present embodiment, when the top plate 3 is arranged at the first use position P1, the top plate is in a sitting posture in which the seated person faces sideways. 3 can be used as a memo stand or the like, and the top plate 3 is positioned above the armrest 8, so that the top plate 3 can function as an armrest 8 on which a seated person's elbow can be placed. On the other hand, when the top plate 3 is arranged at the second use position P2, the top plate 3 can be used as a memo stand or the like in a sitting posture where the seated person faces forward, and the upper portion of the armrest 8 is opened. Therefore, the seated person's elbow can be placed on the armrest 8. In addition, the seated person can use the backrest 7 regardless of the position of the top plate 3 between the first use position P1 and the second use position P2. Accordingly, in the chair 1 that includes the seat 5, the backrest 7, the armrest 8 and the top board 3 and can always use the functions of the entire backrest 7 and the armrest 8, the top board 3 can be used in various sitting postures. realizable.

  The chair body 2 is provided with left and right armrests 8 and the top plate 3 is provided in a pair with the left and right armrests 8. By placing the other top plate 3 at the use position P1 and placing the other top plate 3 at the second use position P2, both the sitting posture in which the seated person faces sideways and the sitting posture in which the front side faces without moving the top plate 3 It is possible to deal with various usage modes such as making the top plate 3 usable.

  Further, since the left and right top plates 3 are configured to face each other at the second use position P2 and close the front of the chair body 2, the top plate surfaces of the left and right top plates 3 are made continuous. It is also possible to use as one large top plate surface.

  Further, the chair body 2 is formed with a partial cylindrical structure 21 opened forward by the left and right armrests 8 and the backrest 7, and the top plate 3 is the upper edge of the structural body 21. Thus, the appearance of the chair 1 can be adjusted.

  Since the top plate 3 is attached to the top end of the top plate support arm 31 pivotally attached to the lower surface of the seat 5, the top plate 3 of the chair 1 can be configured with an armrest 8 with a simple configuration. It is possible to realize a configuration in which the slide is supported so as to be horizontally slidable along the upper edge.

  Next, a second embodiment of the present invention will be described below with reference to FIGS. In the following description, the same name and code | symbol are attached | subjected to each site | part corresponding to the thing in 1st embodiment mentioned above.

  As shown in FIGS. 10 to 12, the chair A <b> 1 of the present embodiment includes a chair body 2 that includes a seat 5, a leg 6, a backrest 7, and an armrest 8 and is opened forward, and the chair body 2. The top plate 3 is movable between a first use position P1 supported above the armrest 8 and a second use position P2 located in front of the chair body 2 by opening the upper part of the armrest 8 from the first use position P1. And a headrest 4 provided above the backrest 7 of the chair body 2.

  As shown in FIGS. 10 to 12, the chair body 2 includes a seat 5, a leg 6 that supports the seat 5, a backrest 7 provided at the upper rear of the leg 6, and left and right sides of the backrest 7. The armrest 8 is provided with a pair of left and right armrests extending forward from both ends. Here, the leg 6, the backrest 7, and the left and right armrests 8 form a structure 21 that forms a partial cylindrical shape that is open forward and is integrally formed as a whole. Further, although not shown, a tension fabric is provided on the surface.

  Since the seat 5, the legs 6 and the backrest 7 have the same configuration as that according to the first embodiment described above, detailed description thereof is omitted.

  The armrest 8 has the same configuration as that according to the first embodiment described above except for the points described below. As shown in FIGS. 10 to 13, the upper edge of the armrest 8, that is, the top of the chair body 2, is formed on the outer surface of the armrest 8, that is, the upper left edge of the chair body 2. The rail A31 extending along the shape of the edge can be accommodated and has an opening 8x that opens outward. On the other hand, the inner side surface of the armrest 8 forms the inner side surface of the chair body 2 smoothly and continuously with the front surface of the backrest 7. In other words, the inner side surface of the chair body 2 is smoothly continuous over the entire surface without unevenness. The top board 3 is attached to the armrest 8 so as to be movable along the rail A31 while maintaining a certain height distance from the upper edge 8a of the armrest 8 along the rail A31. It has been. More specifically, the top plate 3 is attached to the armrest 8 via the rail A31 and a slide arm A32 that can travel along the rail A31.

  The left and right top plates 3 are provided in association with the left and right armrests 8. That is, as shown in FIGS. 10 and 11, the left top plate 3 disposed at the first use position P1 is positioned above the left armrest 8 and the right top plate disposed at the first use position P1. 3 is located above the right armrest 8. Further, the use end edges 3 a of the left and right top plates 3 are each formed in a shape substantially along the upper edge 8 a of the armrest 8, that is, a substantially partial arc shape. Further, the counter-use edge 3b of the left and right top plates 3 has a smooth curved shape protruding outward at the center thereof, and is compared with the distance from the use edge 3a at the end close to the backrest 7. Thus, the distance from the use edge 3a at the end on the side away from the backrest 7 is set large. Both side edges 3c of the left and right top plates 3 are plate-like members that form a straight line. In addition, the left and right top plates 3 have a shape that is bilaterally symmetric when both of them are arranged at the first use position P1. Each top plate 3 is attached to the tip of a slide arm whose base end is in sliding contact with a rail disposed in the opening of the armrest 8. Each top plate 3 extends from the first use position P1 located above the armrest 8 as described above along the upper edge 8a of the structure 21, in other words, the upper edge 8a of the armrest 8. Can be slid horizontally between the second use positions P2 located in front of the chair body 2 with the upper part of the chair body 2 open. The left and right top plates 3 can be moved separately. For example, as shown in FIG. 15, the left top plate 3 as viewed from the seated person is disposed at the first use position P1, and the right top plate 3 as viewed from the seated person is placed at the first use position P1 and the second use position P1. It can arrange | position to the position between use position P2. Then, as shown in FIG. 16, when both the left and right top plates 3 are arranged at the second use position P2, the side edges 3c of the left and right top plates 3 facing each other face each other. The front of the chair body 2 is closed.

  As shown in FIGS. 11, 13, and 14, the rail A31 is mounted in the opening 8x via a rail base A33 provided on the lower surface of the opening 8x of the armrest 8. More specifically, the rail base A33 is a plate-like member having a substantially arc shape in plan view, and is provided with standing pieces A331 having female screw holes A331a at three locations on the inner end thereof. The rail base A33 is fixed to the lower surface of the opening 8x by a male screw member (not shown) in the present embodiment. On the other hand, the rail A31 is in contact with the top surface of the rail base A33 and has a bottom wall A311 on which a rolling wheel A321 provided at the base end of the slide arm A32 is placed, and the bottom wall A311 is located above the bottom wall A311 and covers the entire area. And an upper wall A312 facing each other. The upper wall A312 includes an outer element A312a that forms an outer side from the intermediate portion in the width direction and an inner element A312b that forms an inner side from the intermediate portion in the width direction, and the slide is between the outer element A312a and the inner element A312b. The base end of the arm A32 can be accommodated, and a guide groove A312x for guiding the slide arm A32 and the traveling direction of the top plate supported by the slide arm A32 is formed. From three locations on the inner end of the bottom wall A311, inner standing pieces A313 are provided upright. The inner upright piece A313 includes a spacer portion A313a located on the base end side, and a screw insertion hole A313x that further rises from the upright end of the spacer portion A313a and overlaps the female screw hole A331a of the rail base A33. And an engaging portion A313b that engages with the recessed portion A312y provided in the housing. Further, an outer upright piece A314 is provided upright from the outer end of the bottom wall A311. The outer standing piece A314 includes a spacer portion A314a located on the base end side, and an engaging portion A314b that is further raised from the standing end of the spacer portion A314a and engages with the recess A312y provided on the upper wall A312. I have. Further, side upright pieces A315 are provided upright from both longitudinal edges of the bottom wall A311. The side upright piece A315 includes a spacer portion A315a located on the base end side, and an engaging portion A315b that further rises from the upright end of the spacer portion A315a and engages with the recess A312y provided on the upper wall A312. I have. In the present embodiment, the engaging portion A313b of the inner upright piece A313, the engaging portion A314b of the outer upright piece A314, the engaging portion A315b of the side upright piece A315, and the recess A312y of the upper wall A312 are engaged. These are welded and joined. Furthermore, a lower cover A34 for covering the space between the bottom wall A311 and the upper wall A312 is provided on the outer side of the rail A31. The lower cover A34 is provided with hanging pieces provided with screw insertion holes that overlap with female screw holes (not shown) provided in the outer upright pieces A314 at six locations on the inner edge. The lower cover A34 is attached to the rail A31 by screwing the male screw member that has passed through the screw insertion hole into the female screw hole of the outer upright piece A314. On the outer surface of the lower cover A34, the same upholstery as the surface of the chair body 2 is provided. Furthermore, the lower end edge of the lower cover A34 substantially coincides with the lower end edge of the opening 8x. A top plate support roller A36 is provided on the upper surface of the front portion of the upper wall A312 of the rail A31 so as to contact the lower surface of the top plate 3 via the roller support A361 and support the top plate 3.

  As shown in FIGS. 11, 13, and 14, the slide arm A32 includes a rolling wheel A321a that can run on the bottom wall A311 of the rail A31 at the lower end and a guide provided on the upper wall A312 of the rail A31. A travel part A321 that passes through the groove A312x and an arm part A322 that connects the travel part A321 and the top plate 3 are provided. The arm portion A322 includes an inner carry-out portion A323 extending outward from the upper end of the traveling portion A321, a blindfold portion A324 extending obliquely outward and downward from a protruding end of the inner carry-out portion A323, and the blindfold portion. An upright portion integrally including an outer carry-out portion A325 extending outward from the lower end of A324 and a support bracket A327 that stands up from the protruding end of the outer carry-out portion A325 and supports the top plate 3 at the upper end portion A326. Here, the lower ends of the upright portion A326 and the blindfolded portion A324 reach below the upper end of the rail A31. Further, when the slide arm A32 reaches the rear end of the travel range, the top plate 3 is arranged at the first use position P1, and when the slide arm A32 reaches the front end of the travel range, the top plate 3 is used for the second use. It is arranged at position P2. That is, a portion above the opening 8x of the armrest 8 is disposed between the top 3 and the rail A31. In addition, although not shown, between the slide arm A32 and the arm A31, the top plate 3 supported by the slide arm A32 is placed between the first use position P1 and the second use position P2. A moderation mechanism that can be held at any one of a plurality of locations is provided.

  Here, the rail A31, the slide arm A32, and the top plate 3 form a top plate traveling unit U that can be integrally handled. This top board traveling unit U is provided in a pair of left and right. More specifically, prior to attaching the upper wall A311 to the bottom wall A311 of the rail A31, the rolling wheel A321a of the traveling portion A321 of the slide arm A32 is placed on the bottom wall A311 of the rail A31, and then the rail A31. An outer element A312a and an inner element A312b of the upper wall A312 are attached and welded to the bottom wall A311 of the rail, and a lower cover A34 is attached to the outer standing piece A314 of the bottom wall A311 of the rail A31 and a top plate is attached to the support bracket A327 of the slide arm A32. 3 is attached to form the top board traveling unit U. Then, the top board traveling unit U was inserted from the outside into the opening 8x provided in the armrest 8, and the male screw member was inserted into the screw insertion hole A313x of the inner standing piece A313 of the bottom wall A311 of the rail A31. In this state, the top plate traveling unit U is fixed to the chair body 2 by screwing the male screw member into the female screw hole A331a of the rail base A33.

  Further, as shown in FIG. 13, the upper portion of the rail A31, more specifically, the upper surface of the opening 8x, extends downward and obliquely outward, and from the side space, the rail A31 and the traveling portion A321. An upper cover A35 is attached to cover the engaging portion. The upper cover A35 is located between the blind portion A324 and the upright portion A326 of the arm portion A322 of the slide arm A32, in other words, above the outer take-out portion A325. On the outer surface of the upper cover A35, the same upholstery as the surface of the chair body 2 is provided. Further, the upper cover A35 reaches below the upper end of the inner carry-out portion A323 and the upper end of the blindfold A324, and the upper end edge thereof substantially coincides with the upper end edge of the opening 8x.

  Since the headrest 4 has the same configuration as that of the first embodiment described above, detailed description thereof is omitted.

  As described above, even in the configuration of the chair according to the present embodiment, when the top plate 3 is arranged at the first use position P1, the top plate 3 is placed in a sitting posture in which the seated person faces sideways. While being able to be used as a memo stand or the like, the top plate 3 is located above the armrest 8, so that the top plate 3 can also function as an armrest 8 on which a seated person's elbow can be placed. On the other hand, when the top plate 3 is arranged at the second use position P2, the top plate 3 can be used as a memo stand or the like in a sitting posture where the seated person faces forward, and the upper portion of the armrest 8 is opened. Therefore, the seated person's elbow can be placed on the armrest 8. In addition, the seated person can use the backrest 7 regardless of the position of the top plate 3 between the first use position P1 and the second use position P2. Accordingly, in the chair 1 that includes the seat 5, the backrest 7, the armrest 8 and the top board 3 and can always use the functions of the entire backrest 7 and the armrest 8, the top board 3 can be used in various sitting postures. realizable.

  In addition, in the configuration of the present embodiment, a rail A31 extending along the shape of the upper edge of the chair body 2 is provided, and the top plate 3 is movable along the rail A31. The top plate can be movably supported on the chair body with a simple configuration, and the assembly of the chair can be facilitated.

  In addition, since the armrest 8 is arranged between the rail A31 and the top plate 3, the rail A31 is exposed to the upper space when the top plate is arranged at the second use position P2, and the appearance is impaired. Can be eliminated.

  Furthermore, the top plate traveling unit U including the rail A31, the top plate 3, and the slide arm A32 that connects the rail A31 and the top plate 3 and can travel along the rail A31 is provided on the chair body 2. Since it can be attached by inserting it into the opening 8x provided on the side surface below the armrest 8 from the side, it is possible to easily assemble such a chair.

  The slide arm A32 includes a traveling portion A321 that is in sliding contact with the rail A31, and an arm portion A322 that connects the traveling portion A321 and the top plate A3, and the rail A31 is connected to the front surface of the rail A31. Since the lower cover A34 that covers the engagement portion with the traveling portion A321 and the upper cover A35 that covers the engagement portion between the rail A31 and the traveling portion A321 are attached to the upper portion of the rail A31, the rail The engaging portion between A31 and the traveling portion A321 can be covered from the side space.

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

  For example, the present invention may be applied to a chair in which each of the leg, the backrest, and the armrest is configured separately, and the chair in which any two of the legs, the backrest, and the armrest are configured integrally. The present invention may be applied.

  Further, the present invention may be applied to a chair having an armrest on only one of the left and right sides, and has an armrest that makes a pair on the left and right, and only one top plate is provided in association with only one armrest. The present invention may be applied to a chair.

  Further, as a configuration in which the top plate is slidable above the armrest, in addition to the one according to the above-described embodiment, for example, a guide projection provided at the base end portion of the top plate support arm that supports the top plate at the distal end portion Further, there may be mentioned one using a guide portion formed by engaging a guide groove provided on the upper end portion of the leg or the side surface of the armrest so that the guide projection can be slidably engaged. In such a guide portion, instead of engaging the guide protrusion with the guide groove, a configuration in which a rolling element provided at the base end portion of the top plate support arm can roll in the guide groove may be adopted. .

  Furthermore, you may provide the rail attachment guide part engaged with a rail between the rail base and rail in said 2nd embodiment, guiding a rail so that a movement is possible toward an inner side from the outer side. For example, the rail mounting guide portion is provided on the rail, with a guide protrusion having a retaining portion provided to stand up from the rail base, with the width dimension expanded at the standing end, although not shown in the figure. An insertion portion that can be engaged with the retaining portion of the guide projection without any gap, and that extends outward from the insertion portion and has a width dimension smaller than that of the insertion portion, so that the opening end can be in sliding contact with the base portion of the guide projection. It forms using the guide recessed part provided with the guide part which is. According to this structure, when the top plate receives an action from above and the rolling wheel on the base end side of the slide arm hits the upper wall of the rail and the action of the rail is directed upward, the retaining portion Since it strikes to the side of the guide part, the top board traveling unit including the rails can be held in the chair body more stably.

  In addition, in place of the moderation mechanism described above, the lock mechanism for regulating the movement of the slide arm and the top plate supported by the slide arm between the slide arm and the rail or chair body in the second embodiment. May be provided. This locking mechanism may adopt any one of fixing the top plate only at a predetermined position, for example, the first use position and the second use position, and one capable of holding the top plate at an arbitrary position.

  Moreover, in 2nd embodiment mentioned above, although the armrest is distribute | arranged between the rail and the top plate, the aspect which provides a notch part in the upper surface of a rail, and distributes a rail in the bottom face of this notch part, for example May be adopted.

  Furthermore, in 2nd embodiment mentioned above, the top plate traveling unit provided with the said rail, the said top plate, and the slide arm which connects these rails and a top plate and can drive | work along the said rail is used for a chair main body. It can be attached by inserting from the outside into the opening provided on the outer surface below the armrest, but the opening is provided on the inner surface below the armrest of the chair body, and the top board traveling unit is inserted from the inside It may be possible to attach it. Also, in the case of a mode in which the rail is arranged on the bottom surface of the armrest notch as described in the previous stage, a mode is adopted in which the rail is fixed to the chair body in advance and the slide arm is inserted into the notch from above. May be.

  In addition, the shape of the arm portion of the slide arm is not limited to that according to the second embodiment described above, and for example, a take-out portion extending outward from the traveling portion and a protruding end of the take-out portion stand upward. In addition, a configuration having only an upright portion integrally including a support bracket for supporting the top plate at the upper end portion may be adopted.

  A ball suspension mechanism may be provided at one end or both ends in the longitudinal direction of the rail in the second embodiment.

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

DESCRIPTION OF SYMBOLS 1 ... Chair 2 ... Chair main body 3 ... Top plate 31 ... Top plate support arm A31 ... Rail A32 ... Slide arm A321 ... Running part A322 ... Arm part A34 ... Lower cover A35 ... Upper cover 5 ... Seat 7 ... Backrest 8 ... Armrest P1 ... 1st use position P2 ... 2nd use position

Claims (9)

A chair body provided with a seat, a backrest and an armrest and opened forward, and a chair body which is supported by the chair body and is opened above the armrest from a first use position. And a top plate movable between a second use position located in front of the chair. The chair according to claim 1, wherein the chair body includes left and right armrests, and the top plate that forms a pair of left and right is provided in association with the left and right armrests. The chair according to claim 2, wherein the left and right top plates are configured to face each other at the second use position and close the front of the chair body. The chair body forms a partially cylindrical structure opened forward by left and right armrests and backrest, and the top plate slides horizontally along the upper edge of the structure. The chair according to claim 2 or 3, wherein the chair is configured to be obtained. The chair according to claim 1, 2, 3, or 4, wherein the top plate is attached to a distal end of a top plate support arm having a base end portion pivotally attached to a lower surface of the seat. The chair according to claim 1, wherein the chair has a rail extending along a shape of an upper edge portion of the chair body, and the top plate is movable along the rail. The chair according to claim 6, wherein an armrest is disposed between the rail and the top plate. A top plate traveling unit comprising the rail, the top plate, and a slide arm connecting the rail and the top plate and capable of traveling along the rail is provided in an opening provided on a side surface below the armrest of the chair body. The chair according to claim 6 or 7, which can be attached by inserting from a side. The slide arm has a traveling portion that is in sliding contact with the rail, and an arm portion that connects the traveling portion and the top plate, and covers the engagement portion between the rail and the traveling portion on the front surface of the rail. The chair according to claim 8, wherein an upper cover that covers an engagement portion between the rail and the traveling portion is attached to an upper portion of the rail and an upper portion of the rail.

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