JP2019069309A - Chair - Google Patents

Abstract

To provide a chair which can rock and has a wide shelf part.SOLUTION: A chair has a seating part, a leg part, and a shelf part. The seating part has a seating surface on which a user can be seated. The leg part is provided on an installation object where the chair is installed, and supports the seating part movably in a back and forth direction. The shelf part is provided below the seating part and moves in the back and forth direction as the seating part moves in the back and forth direction. The leg part is provided on either a position closer to a left side or a position closer to a right side from the center of the seating part or both of them with respect to the horizontal direction.SELECTED DRAWING: Figure 14

Description

  The present disclosure relates to a chair having a shelf on which luggage can be placed.

  As a chair that can load luggage, for example, a chair having a mounting plate provided under a seat plate, such as the chair described in Patent Document 1, has been proposed. Since the chair of Patent Document 1 is a chair on which a box of pachinko balls is placed, the shelf portion (mounting plate) is maintained in a flat state.

Japanese Utility Model Publication No. 03-7760

  An object of the present disclosure is to provide a chair that is swingable and has a large shelf.

  One aspect of the present disclosure is a chair including a seat, a leg, and a shelf. The seating portion has a seating surface on which a user can sit. The leg portion is provided on the installation object on which the chair is installed, and supports the seating portion so as to be movable in the front-rear direction. The shelf portion is provided below the seating portion, and moves in the front-rear direction as the seating portion moves in the front-rear direction. The legs are provided at one or both of the left side and the right side of the center of the seat in the lateral direction.

In one aspect of the present disclosure, the shelf portion may have a placement area on which the load can be placed, in the left-right direction over both the left and right sides with respect to the center of the seating portion.
In one aspect of the present disclosure, the shelf may be coupled to the leg, and the shelf may be coupled to the seating.

It is a figure which shows the chair of a 1st reference example, Comprising: FIG. 1A is a front view, FIG. 1B is a right side view in use condition, FIG. 1C is a right side view in an accommodation state. It is the figure which expanded the principal part of the chair of the 1st reference example, and FIG. 2A is a right side view in case a leg is a 1st position, FIG. 2B is a right side in a case where a leg is a 2nd position It is a front view. It is the figure which expanded the principal part of the chair of a 1st reference example, Comprising: FIG. 3A is a top view, FIG. 3B is a front view. FIG. 4A is a schematic right side view, and FIG. 4B is a schematic right side view corresponding to the first reference example. It is the figure which expanded the principal part of the chair of the 2nd reference example, and FIG. 5A is a right side view in case a leg is a 1st position, FIG. 5B is a right side in the case a leg is a 2nd position It is a front view. It is the figure which expanded the principal part of the chair of a 2nd reference example, Comprising: FIG. 6A is a top view, FIG. 6B is a front view. It is the figure which expanded the principal part of the chair of the 3rd reference example, and FIG. 7A is a right side view in case a leg is a 1st position, FIG. 7B is a right side in the case a leg is a 2nd position It is a front view. It is the figure which expanded the principal part of the chair of a 3rd reference example, Comprising: FIG. 8A is a top view, FIG. 8B is a front view. It is the figure which expanded the principal part of the chair of the 4th reference example, and FIG. 9A is a right side view in case a leg is a 1st position, FIG. 9B is a right side in a case where a leg is a 2nd position It is a front view. It is the figure which expanded the principal part of the chair of a 4th reference example, Comprising: FIG. 10A is a top view, FIG. 10B is a front view. It is a perspective view which shows the chair of 1st Example. It is a figure which shows the chair of 1st Example, Comprising: FIG. 12A is a front view, FIG. 12B is a right side view in use condition, FIG. 12C is a right side view in an accommodation state. It is a figure which shows the chair of 2nd Example, Comprising: FIG. 13A is a front view, FIG. 13B is a right side view in use condition, FIG. 13C is a right side view in an accommodation state. It is a perspective view which shows the chair of a modification.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
[1. First reference example]
[1-1. overall structure]
As shown in FIGS. 1A to 1C, the chair 1 of the present embodiment includes a base 11, a leg 13, a seat 15, a shelf 17, a bearing 19, and a link member 21.

  In the following, for convenience, the configuration of the chair 1 will be described using directions such as front and back, up and down, left and right, but these directions are merely definitions defined only for this reference example for explaining the positional relationship of each component. Moreover, the usage mode of the chair 1 is not limited. For example, although the chair 1 is configured to swing back and forth with respect to the user, it may be configured to swing left and right. The left and right directions are directions based on the state in which the user is seated on the seating portion. Therefore, the right side view shown in FIG. 1B is a view showing the left side with respect to the user.

  The base 11 is disposed on the installation surface 3 which is a flat surface on which the chair 1 is installed. As shown to FIG. 2A, B, the base 11 is provided with the rotating shaft 31 which has length in the left-right direction. The leg portion 13 is configured to be swingable back and forth around the rotation shaft 31.

  Further, in the base portion 11, a space 11a into which the leg portion 13 can be inserted is formed. The space 11 a is a hole formed in the base 11 and opened at the upper side, and the rear rear contact surface 33 and the lower lower contact surface 35 constituting the hole are stoppers for swinging the leg 13. Act as.

  The legs 13 are hollow columnar members and extend upward from the base 11. From the state where the lower end of the leg 13 is in contact with the lower contact surface 35 as shown in FIG. 2A, the leg 13 is in a state where the rear of the lower part of the leg 13 is in contact with the rear contact surface 33 as shown in FIG. Swing between FIG. 2A corresponds to the chair 1 shown in FIG. 1B, and hereinafter, the position of the leg 13 is also described as a first position. Moreover, FIG. 2B respond | corresponds to the chair 1 shown to FIG. 1C, and describes the position of this leg 13 also as a 2nd position hereafter.

In FIG. 1B, the leg 13 swings backward and the distance from the desk 2 is increased. In FIG. 1C, the leg 13 swings forward and the distance from the desk 2 decreases. The storage state is shown.
Further, a spring 37 is provided on the base 11. The spring 37 biases the leg 13 from the first position to the second position. When no external load is applied, the leg 13 is moved by the spring 37 to the second position. That is, the chair 1 will be in the accommodation state which the seating part 15 moved ahead, when load is not applied from the outside.

The seating portion 15 is provided on the leg portion 13 and has a seating surface 39 on which a user can sit and a backrest 41, as shown in FIGS. 1A to 1C.
The shelf portion 17 is provided below the seating portion 15 and includes a frame pipe 43 and a placement plate 45 as shown in FIGS. 2A and 2B and FIGS. 3A and 3B.

  The frame pipe 43 is bent to form an annular body. This annular body has a substantially rectangular shape with rounded corners when viewed from above. The mounting plate 45 is disposed inside the annular body formed by the frame pipe 43 and is fixed to the frame pipe 43. The user can load the load on the mounting plate 45 and the frame pipe 43.

  As shown in FIG. 3A, at the center in the left-right direction at the front of the mounting plate 45, a notch 45a that is cut away toward the rear is formed. By forming the notch 45 a, the center portion in the left-right direction in front of the frame pipe 43 has a gap with the mounting plate 45. This portion of the frame pipe 43 is referred to as an insertion portion 47.

  The bearing 19 is attached to the leg 13. In the bearing portion 19, as shown in FIGS. 2A and 2B, a through hole 19a in the left-right direction is formed. In the state where the insertion portion 47 is inserted into the through hole 19a, the insertion portion 47 is rotatable inside the through hole 19a.

  That is, the insertion portion 47 is rotatably held by the bearing portion 19, and in this state, the leg portion 13 and the shelf portion 17 are rotatably connected centering on the insertion portion 47. The upper portion of the bearing portion 19 may be open, and the insertion portion 47 may be configured to be removable from the through hole 19a.

  The link members 21 are members that are rotatably connected to the base 11 and the shelf 17, respectively, and are provided in pairs on the left and right. In the following description including the embodiment other than the present embodiment, the configuration provided on the left and right pair is symmetrical with respect to a plane extending in the front and back and up and down unless otherwise described.

  One end of each link member 21 is rotatably connected to the base 11 about the lower shaft 21 a. The other end is rotatably connected to the shelf 17 around an upper shaft 21 b provided on a pair of left and right connecting pieces 51 extending downward from the mounting plate 45. By linking the link members 21 in this manner, a four-bar link is configured by the link member 21, the base 11, the legs 13, and the shelf 17.

  Here, the four-bar link is a link mechanism composed of four links. In the present embodiment, the rotary shaft 31, the insertion portion 47, the upper shaft 21b, and the lower shaft 21a are joints. The base 11 is a fixed link, the leg 13 driven when the user swings the chair 1 is a drive link, the link member 21 is a driven link, and the shelf 17 is an intermediate link. Further, the distance between the rotating shaft 31 and the insertion portion 47 and the distance between the upper shaft 21b and the lower shaft 21a are substantially equal, and the intermediate link is a parallel link moving in parallel.

  In addition, although the link member 21 illustrated the structure by which one end is connected with the base 11, it may be connected with respect to the installation part provided in the installation surface 3 separately from the base 11. FIG. In addition, the position where the end of the link member 21 is connected can be made into various positions, on the condition that a four-bar link can be comprised. For example, at least the condition includes a position spaced from the rotation shaft 31 when viewed from the left and right side surfaces.

  Moreover, the position in the shelf 17 to which the other end of the link member 21 is connected can also be various positions, as long as the four-bar link can be configured as in the one end. For example, at least the condition includes a position spaced apart from the connection position with the leg 13 (here, the position of the bearing 19) when viewed from the left and right sides.

[1-2. Movement of the shelf with swinging of the leg]
When the leg portion 13 swings back and forth, the leg portion 13 and the shelf portion 17 are connected by the bearing portion 19 and the insertion portion 47, so the shelf portion 17 moves back and forth with the leg portion 13. In the chair 1, the inclination of the shelf 17 accompanying this movement is suppressed.

  First, the definition of the swing angle α when the leg 13 swings back and forth and the inclination angle β of the shelf 17 will be described with reference to FIG. 4A. In FIG. 4A, for the purpose of facilitating understanding, the inclination of the shelf 17 is shown such that the inclination angle is larger than the inclination angle β of the shelf 17 of the present embodiment.

FIG. 4A is a view from the left side of the chair 1. The swing angle α and the tilt angle β are values based on the legs 13 and the shelf 17 projected on a plane that spreads back and forth and up and down.
In FIG. 4A, the legs 13 and the shelf 17 shown by broken lines show the state where the legs 13 are at the first position, and the legs 13 and the shelf 17 shown by solid lines have the legs 13 at the second position. Indicates the state of

  The angle of rocking when the leg 13 is rocked from the first position to the second position is taken as a rocking angle α. The swing angle referred to here is the angle of rotation of the leg 13 around the rotation axis 31. For example, a straight line A passing through the center of the leg 13 at the first position and the leg at the second position It can be indicated by an angle formed by a straight line B passing through the center of 13.

  The angle of inclination with respect to the reference of the shelf 17 when the leg 13 is located at the second position is the tilt angle β, based on the shelf 17 when the leg 13 is located at the first position. The inclination angle β is, for example, represented by an angle formed by a straight line C along the upper end of the shelf 17 at the first position and a straight line D along the upper end of the shelf 17 at the second position. Can.

  The angle of inclination described above can also be referred to as a rotation angle of the shelf 17 whose axis is in the left-right direction. The term "rotation" as used herein means the angle of rotation when only the shelf 17 is focused, that is, the angle of rotation of the shelf 17 relative to the base 11 and the leg 13 of the shelf 17. Is not the angle when it moves by rotation.

  The setting method of the straight line used as the reference | standard for measuring an angle is not specifically limited, It can set as a straight line which passes arbitrary two points on the shelf part 17. FIG. Further, a change in the inclination of the mounting plate 45 may be used as the inclination angle β.

  Next, the actual inclination angle β of this reference example will be described using FIG. 4B. As shown in FIG. 4B, the straight line C and the straight line D are substantially parallel. That is, the inclination of the shelf 17 when the leg 13 moves from the first position to the second position is approximately 0 degrees.

  If the shelf portion 17 is fixed to the leg portion 13 and the swing angle is α, the inclination angle is also α. Therefore, if the inclination angle β is configured to be smaller than the swing angle α, it can be said that there is an effect of suppressing the dropout of the luggage due to the tilt of the shelf 17 caused by the swing of the leg portion 13.

  In the present embodiment, the four-bar link described above controls the movement of the shelf 17 so that the inclination angle β is smaller than the swing angle α.

[1-3. effect]
According to the first reference example described in detail above, the following effects can be obtained.
(1a) In the chair 1, the inclination angle β of the shelf 17 caused by the swing becomes smaller than the swing angle α when the leg 13 swings. Therefore, when the leg portion 13 swings while the luggage is placed on the shelf 17, the luggage may drop from the shelf 17 or move to a biased position on the shelf 17. It can be suppressed.

  (1b) The connection between the leg portion 13 and the shelf portion 17 is realized by inserting the insertion portion 47 into the bearing portion 19. Therefore, in the shelf portion 17, the leg portion 13 interlocks with the swinging to move back and forth Moving. Therefore, for example, although the leg 13 is in the second position, the shelf 17 is located at the rear to prevent the passage of the back of the chair 1 or the leg is in the first position. It is difficult for the shelf 17 to move forward and prevent the seating from being disturbed, and the shelf 17 can be prevented from being disturbed by the user or the like.

  (1c) In the chair 1, angle control of the shelf 17 at the time of swinging is realized by the four-joint link. Therefore, the position of the shelf 17 at the time of swinging can be strictly controlled, and the danger due to movement to an unexpected position can be suppressed.

[2. Second reference example]
[2-1. Differences from the first reference example]
In the second reference example, since the basic configuration of the chair is the same as the first reference example, the description of the common configuration will be omitted, and differences will be mainly described. The same reference numerals as those in the first reference example denote the same components, and reference is made to the preceding description.

The chair 1a of the second reference example will be described with reference to FIGS. 5A and 5B and FIGS. 6A and 6B.
The base 61 has on the left and right side surfaces thereof a slide groove 71 having a length in the front-rear direction and recessed toward the center side in the left-right direction of the base 61. The slide groove 71 is formed such that the center side of the base portion 61 is wider at the top and the bottom than at the outer side.

  The shelf 63 is formed with a pair of left and right support portions 75 having lengths in the vertical direction below the frame pipe 43 and the mounting plate 45. The pair of support portions 75 is disposed so as to sandwich the base 61, and the lower end thereof is bent toward the center of the base 61. At the bent end, a sliding portion 77 having a length in the front-rear direction is provided. The sliding portion 77 is configured to be slidable in the front-rear direction inside the slide groove 71. Further, the slide portion 77 is formed to have a slight clearance with the slide groove 71 with respect to the height in the vertical direction.

  The bearing portion 65 is formed with an elongated hole 65 a having a length in the longitudinal direction of the leg portion 13. In a state in which the insertion portion 47 is inserted into the long hole 65 a, the insertion portion 47 is rotatably held by the bearing portion 65, and the leg portion 13 and the shelf portion 63 are rotatably connected centering on the insertion portion 47. .

[2-2. Movement of the shelf with swinging of the leg]
Since the leg portion 13 and the shelf portion 63 are connected by the bearing portion 65 and the insertion portion 47, the shelf portion 63 moves back and forth as the leg portion 13 swings.

  Since the sliding portion 77 is movable only in the front-rear direction with respect to the slide groove 71, the shelf portion 63 connected to the sliding portion 77 via the support portion 75 is movable back and forth with the swinging of the leg portion 13. Move only in the direction.

  Further, since the sliding portion 77 has only a small clearance in the vertical direction with respect to the slide groove 71, the displacement of the sliding portion 77 other than the movement in the front-rear direction is suppressed, and as a result, the inclination of the shelf 63 is suppressed. .

  In the present embodiment, when the leg 13 moves from the first position to the second position, the shelf 63 moves only in the front-rear direction, so the inclination angle of the shelf 63 accompanying the swing is 0 degrees. That is, the inclination angle β is smaller than the swing angle α. In addition, the height of the shelf 63 does not change with the swing.

  As described above, the slide groove 71 and the sliding portion 77 control the inclination of the shelf 63 during the movement while guiding the movement of the shelf 63 in the front-rear direction accompanying the swing of the leg 13. .

[2-3. effect]
According to the second reference example described above, in addition to the same effects as the effects (1a) and (1b) of the first reference example described above, the following effects can be obtained.

  (2a) The chair 1a controls the movement of the shelf 63 along with the swing of the leg 13 by the slide mechanism. Therefore, it is suppressed that the shelf part 63 moves to the position which is not assumed with rocking | fluctuation of the leg part 13. As shown in FIG. Further, since the sliding direction is the front and back direction, the shelf 63 does not move up and down even if the leg 13 swings. Therefore, it is possible to suppress that the load placed on the shelf portion 63 moves up and down at the time of swinging, and it is possible to highly suppress dropout of the load from the shelf portion 63.

[3. Third reference example]
[3-1. Differences from the first reference example]
In the third reference example, since the basic configuration of the chair is the same as that of the first reference example, the description of the common configuration will be omitted, and differences will be mainly described. The same reference numerals as those in the first reference example denote the same components, and reference is made to the preceding description.

The chair 1b of the third reference example will be described with reference to FIGS. 7A and 7B and FIGS. 8A and 8B.
The base 81 is different from the base 11 of the first reference example only in that the link member 21 is not connected, and the other configuration is the same as the base 11.

  The shelf 83 is different from the shelf 17 of the first reference example only in that the connecting piece 51 for connecting to the link member 21 is not formed, and the other configuration is the same as that of the shelf 17. It is.

  The leg portion 85 is a hollow member similar to the leg portion 13 of the first reference example, and a through hole 87 penetrating in the left-right direction is formed on both left and right side surfaces. In the state where the insertion portion 47 is inserted into the through hole 87, the insertion portion 47 is rotatably held by the leg portion 85, and the leg portion 85 and the shelf portion 83 are rotatably connected centering on the insertion portion 47. .

The chair 1 b also has a first gear 91, a second gear 93, and a third gear 95. All of these gears are provided inside the leg 85.
The first gear 91 is a spur gear whose teeth are cut in parallel to the axis around the rotation axis 31. In the present embodiment, the rotating shaft 31 is fixed to the base 81, and the first gear 91 is fixed to the rotating shaft 31. As a result, the first gear 91 can not rotate with respect to the base 81.

The second gear 93 is a spur gear whose axis is the insertion portion 47, and is fixed to the insertion portion 47 so as not to be rotatable with respect to the insertion portion 47.
The third gear 95 is a spur gear whose axis is a shaft 97 provided on the leg portion 85, and freely rotates around the shaft 97. The second gear 93 meshes with both the first gear 91 and the third gear 95.

[3-2. Movement of the shelf with swinging of the leg]
As shown in FIG. 7B, when the leg 85 swings forward, the position of the shaft 97 moves but the first gear 91 is fixed and does not rotate, so the third gear 95 is an arrow about the shaft 97. Rotate in the E direction (that is, counterclockwise on the drawing). Then, the second gear 93 rotates about the insertion portion 47 in the arrow F direction (that is, clockwise in the drawing). When the leg 85 swings backward, the second gear 93 rotates in the opposite direction to the above.

  That is, the first gear 91, the second gear 93, and the third gear 95 control the rotation of the insertion portion 47, whereby the shelf 83 swings relative to the leg 85 when the leg 85 swings. Rotate in the opposite direction to the direction of movement. As a result, the inclination angle β is approximately 0 ° and smaller than the swing angle α.

[3-3. effect]
According to the third reference example described above, in addition to the same effects as the effects (1a) and (1b) of the first reference example described above, the following effects can be obtained.

(3a) In the chair 1b, by rotating the insertion portion 47 in the direction opposite to the swinging direction of the leg 85, the shelf 83 can be prevented from being largely inclined by the swinging.
(3b) The first gear 91, the second gear 93, and the third gear 95 are provided inside the leg portion 85, and the configuration other than the shelf portion 83 is not exposed to the outside. Therefore, it is possible to reduce the number of parts that are displaced during rocking and are exposed to the outside. Therefore, since it becomes difficult for a user's body, a luggage | load, etc. to contact such components, the danger that the rocking | fluctuation of the leg part 85 and the movement of the shelf part 83 will be inhibited by the contact can be reduced.

[4. 4th reference example]
[4-1. Differences from the first reference example]
In the fourth reference example, since the basic configuration of the chair is the same as that of the first reference example, the description of the common configuration will be omitted, and differences will be mainly described. The same reference numerals as those in the first reference example denote the same components, and reference is made to the preceding description.

The chair 1c of the fourth reference example will be described with reference to FIGS. 9A and 9B and FIGS. 10A and 10B.
The base 101 has the same configuration as the base 81 of the third reference example.
The shelf portion 103 is formed below the frame pipe 43 and the mounting plate 45 with a pair of support legs 111 having a length on the left and on the right, with the base 101 at the center. The support leg 111 has a front end portion and a rear end portion extending downward, and a roller 113 is provided at each of the extended ends.

  The bearing portion 105 has the same configuration as the bearing portion 65 of the second reference example, and the leg portion 13 and the shelf portion 103 rotate around the insertion portion 47 in a state where the insertion portion 47 is inserted into the long hole. It is linked possible.

  The rollers 113 rotate around an axis parallel to the rotation axis 31 and contact the installation surface 3 from above. The support is not limited to the installation surface 3. For example, the base 101 may be provided with a flat surface in which the roller 113 contacts. In addition, a member different from the base 101 may be installed at a position where the roller 113 contacts.

  As shown in FIGS. 9A and 9B, when the leg 13 swings back and forth, the shelf 103 moves back and forth. At this time, when the roller 113 rotates and moves the upper surface of the installation surface 3, the frictional force is reduced, and the shelf portion 103 moves smoothly. Since the shelf 103 only moves back and forth on the installation surface 3, the inclination angle β of the shelf 103 changes with respect to the reference even when the leg 13 swings from the first position to the second position. Move back and forth without.

[4-2. effect]
According to the fourth reference example described above, in addition to the same effects as the effects (1a) and (1b) of the first reference example described above, the following effects can be obtained.

  (4a) In the chair 1c, when the leg portion 13 swings, the shelf portion 103 moves back and forth at a position above a fixed distance from the installation surface 3. Therefore, it is possible to suppress that the load placed on the shelf portion 103 moves up and down due to the swing without causing the shelf portion 103 to tilt due to the swing, and to highly suppress the dropout of the load. Can.

[5. First embodiment]
[5-1. overall structure]
As shown in FIG. 11, the chair 121 of the present embodiment includes a base 131 disposed on the installation surface 3 which is a plane on which the chair 121 is installed, a leg 133 extending upward from the base 131, and a leg A seat portion 15 is attached to the seat portion 133 via a seat support 135, and a shelf 137 provided below the seat portion 15 and on which a load can be placed.

The leg portion 133 of the chair 121 is divided into two left and right hands and extends upward, and a shelf portion 137 is disposed therebetween.
The swinging of the chair 121 and the movement of the shelf 137 will be described with reference to FIGS. 12A to 12C. The base 131 is provided with a rotary shaft 139 extending in the left-right direction so as to be rotatable with respect to the base 131. The leg portion 133 is integrally formed with the rotation shaft 139 and swings back and forth around the rotation shaft 139.

  At the left and right ends of the shelf portion 137, a pair of connecting shafts 141 extending in the left-right direction is provided. Since each connecting shaft 141 is rotatably held by the leg portion 133, the leg portion 133 and the shelf portion 137 are rotatably connected centering on the connecting shaft 141.

  In addition, a pair of link members 143 provided on the left and right of the base 131 is rotatably connected to the base 131 and a connection piece 145 provided on the lower side surface of the shelf 137. A four-bar link is configured by the link member 143, the leg portion 133, and the shelf portion 137.

  In the chair 121, when the legs 133 swing between the first position shown in FIG. 12B and the second position shown in FIG. The slope of 137 hardly changes. That is, based on the shelf 137 when the leg 133 is located at the first position, the angle of inclination of the leg 137 with respect to the reference when the leg 133 is located at the second position is the same as that of the leg 133. It becomes smaller than the angle of rocking when rocking from the first position to the second position.

5-2. effect]
According to the first embodiment described above, in addition to the same effects as the effects of the first reference example described above, the following effects can be obtained.

  (5a) Since the shelf portion 137 is disposed between the leg portions 133 divided into right and left, the chair 121 can widely use the space below the seating portion 15, and the shelf portion 137 is enlarged, It is possible to widen the space where luggage can be placed.

[6. Second embodiment]
[6-1. overall structure]
As shown in FIGS. 13A to 13C, the chair 151 of the present embodiment includes a base portion 161 disposed on the installation surface 3 which is a plane on which the chair 151 is installed, and a leg portion 163 extending upward from the base portion 161. The seat portion 15 is attached to the leg portion 163 via a seat support 165, and a shelf portion 167 provided below the seat portion 15 and on which a load can be placed.

The leg portion 163 of the chair 151 is divided into two left and right hands and extends upward, and a shelf portion 167 is disposed therebetween.
The base portion 161 is integrally formed with the leg portion 163, and a rotation shaft 169 extending in the left-right direction is provided rotatably with respect to the base portion 161. In the left and right sides of the base portion 161, elongated holes 171 having a length in the front-rear direction are formed.

  At the front end of the shelf portion 167, a hanging pipe 173 connecting the shelf portion 167 and the seat support 165 is provided. The hanging pipe 173 has a pair of left and right vertical columns 173a extending upward from the left and right sides of the shelf part 167 and bending and extending backward, and a horizontal column 173b extending in the left and right direction connecting the pair of vertical columns 173a. doing.

  At the lower part of the seat support 165, a pair of projecting parts 174 extending downward at two places spaced in the left and right direction are provided, and in each of the projecting parts 174, through holes 175 penetrating in the left and right direction are provided. It is done.

  In the state where the horizontal column 173 b is inserted into the through hole 175, the horizontal column 173 b can be rotated in the through hole 175. That is, the horizontal column 173b is rotatably held by the projection 174, and in this state, the seating portion 15 and the shelf 167 are rotatably coupled to each other around the horizontal column 173b.

  At the lower part of the shelf part 167, a pair of connecting pieces 176 extending downward at two places spaced in the left-right direction are provided, and in each connecting piece 176, an insertion part 177 inserted into the elongated hole 171 Is formed.

  In the chair 151, when the leg portion 163 swings between the first position shown in FIG. 13B and the second position shown in FIG. 13C, the shelf portion 167 receives a load via the hanging pipe 173 and the front-rear direction Move to At this time, the insertion portion 177 slides and moves inside the long hole 171.

  The shape of the long holes 171 viewed from the left and right sides is a shape that matches the shape of the area in which the through hole 175 moves by swinging. Therefore, even if the leg portion 163 swings, the positional relationship between the through hole 175 and the insertion portion 177 does not greatly change, so that the shelf portion 167 is prevented from being largely inclined when the shelf portion 167 is moved back and forth. .

  That is, based on the shelf 167 when the leg 163 is at the first position, the leg 163 is at an angle of inclination relative to the reference of the shelf 167 when the leg 163 is at the second position. It becomes smaller than the angle of rocking when rocking from the first position to the second position.

6-2. effect]
According to the second embodiment described above, in addition to the effects similar to the effects (1a) and (1b) of the first reference example described above and the effects similar to (5a) of the first example, An effect is obtained.

  (6a) The chair 151 controls the movement of the shelf portion 167 accompanying the swinging of the leg portion 163 by the slide mechanism having the insertion portion 177 and the long hole 171. Therefore, it can suppress that the shelf part 167 moves to the position which is not assumed.

  (6b) The shelf part 167 is connected to the projecting part 174 provided on the seating part 15 via the hanging pipe 173. As a result, compared to the case where the shelf is connected to the leg, the amount of movement of the shelf 167 when the leg 163 swings is increased. As a result, when the leg portion 163 moves to the second position, the shelf portion 167 moves to the front largely, so even if the shelf portion 167 is formed to be large in the front-rear direction, to the rear of the chair 151 in the stored state The protrusion amount of the shelf 167 can be reduced.

[7. Other Embodiments]
Although the embodiments of the present disclosure have been described above, it is needless to say that the present disclosure is not limited to the above embodiments at all, and may take various forms within the technical scope of the present disclosure.

(7a) The chair of the present disclosure is not limited to the configuration shown in the above embodiment.
For example, the leg may extend upward in at least one of the swingable ranges from the first position to the second position. The upper side in this case does not mean only the vertical direction, but may be an upward direction inclined with respect to the vertical.

  The legs may also be configured to support the seat 15 in cooperation with other elements. For example, at the front or rear of the leg, the base and the second leg rotatably connected to the seat are provided, and the base, the seat, the leg and the second leg form a four-bar link It may be

  Further, the rotation axis serving as the center of swinging of the leg may be fixed to the base or may be held at a predetermined position of the base. The predetermined position in this case may have a certain range, and for example, the rotation axis may be configured to be movable back and forth or up and down. The rotation axis may be part of another element such as a leg.

  The leg may be configured to be swingable beyond the range from the first position to the second position. And in the range beyond the range from the first position to the second position, the angle of inclination of the shelf may not be smaller than the angle at which the leg swings.

  Further, as described in the above embodiments, the connecting portion for connecting the leg portion and the shelf portion is a main body of the connecting shaft (for example, the insertion portion 47, the connecting shaft 141, and the horizontal post 173b) fixed to the shelf portion. The connection may be realized with a configuration different from the configuration in which the bearing portion provided in the portion rotatably holds. For example, the shelf may be provided with a bearing and the main body may be provided with a connecting shaft.

  In the connecting portion, at least when the leg swings, the shelf moves in the same direction as the moving direction of the leg seen from above along with the leg, and the relative position between the shelf and the leg It is sufficient if they are linked so that the physical position can be changed. For example, the shelf may be suspended from the main body by a wire. The connecting portion may be configured to be removable by the user.

Further, the connecting shaft 141 does not have to be parallel to the rotation shaft (for example, the rotation shaft 31, the rotation shaft 139, the rotation shaft 169), and may be disposed to be inclined.
In the above embodiment, an example was described in which the leg was at the first position when in use and the leg was at the second position in the stored state. However, the first position and the second position It is not limited to what corresponds to the state.

  (7b) In the above embodiments, the inclination angle β is substantially 0 °. However, the inclination angle β may not be 0 ° as long as it is smaller than the swing angle. If the inclination angle is 10 ° or less, the risk of falling off of the package is small, and if it is 5 ° or less, the danger can be significantly reduced. On the other hand, for example, when the chair is in the stored state, that is, in the above embodiment, when the legs are at the second position, the back of the shelf may be configured to be inclined downward. With this configuration, it is possible to improve the ease of placing and removing luggage.

(7c) In each of the above-described embodiments, the shelf portion is not inclined in the left-right direction even when the leg portion swings, but may be tilted in a range not exceeding the swing angle α.
(7d) In the first embodiment and the second embodiment, the leg portion is split into two left and right hands and extends upward, and the shelf portion is disposed between the leg portions. The configuration in which the shelf portion is widely configured with restriction is illustrated. However, as in the chair 201 shown in FIG. 14, the leg portion 203 may extend from the base portion 131 only to one of the left and right. The legs 203 extend leftward from the base 131 and their tips extend upward to support the seating portion 15.

  Even with such a chair 201, it is possible to improve the freedom of the shape of the shelf by suppressing the restriction on the arrangement and the shape of the shelf. The leg 203 may be provided only on the right of the base 131.

  (7e) The plurality of functions of one component in the above embodiment may be realized by a plurality of components or one function of one component may be realized by a plurality of components . Also, a plurality of functions possessed by a plurality of components may be realized by one component, or one function realized by a plurality of components may be realized by one component. In addition, part of the configuration of the above embodiment may be omitted. In addition, at least a part of the configuration of the above-described embodiment may be added to or replaced with the configuration of the other above-described embodiment. In addition, all the aspects contained in the technical thought specified only by the words described in the claim are an embodiment of this indication.

1, 1a, 1b, 1c: chair, 3: installation surface, 11: base, 13: leg, 15: seat, 17: shelf, 19: bearing, 21: link member, 31: rotation shaft, 47 ... insert portion 61 base portion 63 shelf portion 65 bearing portion 81 base portion 83 shelf portion 85 leg portion 91 first gear 93 second gear 95 third gear 95 DESCRIPTION OF SYMBOLS 101 ... Base, 103 ... Shelf part, 105 ... Bearing part, 113 ... Roller, 121 ... Chair, 131 ... Base, 133 ... Leg part, 137 ... Shelf part, 139 ... Rotation axis, 141 ... Connecting shaft, 143 ... Link member 151: Chair, 161: base, 163: leg, 165: seat, 167: shelf, 169: rotational axis, 173: hanging pipe, 173a: vertical column, 173b: horizontal column, 174: projection, 175 ... through hole, 201 ... chair, 203 ... leg

Claims (4)

A chair,
A seating portion having a seating surface on which a user can sit;
A leg that is provided on an installation object on which the chair is installed and supports the seating portion so as to be movable in the front-rear direction;
And a shelf portion provided below the seating portion and moving in the front-rear direction along with the longitudinal movement of the seating portion,
The chair according to claim 1, wherein the leg portion is provided at one or both of a left side position and a right side position of a center of the seat in a lateral direction. A chair according to claim 1, wherein
In the chair, the shelf portion has a placement area on which a load can be placed, in both right and left directions, with respect to the center of the seating portion. A chair according to claim 1 or 2, wherein
A chair, wherein the shelf is connected to the legs. A chair according to claim 1 or 2, wherein
A chair, wherein the shelf is connected to the seating.